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

   1 /*
   2  * Copyright 2015-2017 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/pci.h>
  24 #include <linux/acpi.h>
  25 #include "kfd_crat.h"
  26 #include "kfd_priv.h"
  27 #include "kfd_topology.h"
  28 #include "kfd_iommu.h"
  29
  30 /* GPU Processor ID base for dGPUs for which VCRAT needs to be created.
  31  * GPU processor ID are expressed with Bit[31]=1.
  32  * The base is set to 0x8000_0000 + 0x1000 to avoid collision with GPU IDs
  33  * used in the CRAT.
  34  */
  35 static uint32_t gpu_processor_id_low = 0x80001000;
  36
  37 /* Return the next available gpu_processor_id and increment it for next GPU
  38  *      @total_cu_count - Total CUs present in the GPU including ones
  39  *                        masked off
  40  */
  41 static inline unsigned int get_and_inc_gpu_processor_id(
  42                                 unsigned int total_cu_count)
  43 {
  44         int current_id = gpu_processor_id_low;
  45
  46         gpu_processor_id_low += total_cu_count;
  47         return current_id;
  48 }
  49
  50 /* Static table to describe GPU Cache information */
  51 struct kfd_gpu_cache_info {
  52         uint32_t        cache_size;
  53         uint32_t        cache_level;
  54         uint32_t        flags;
  55         /* Indicates how many Compute Units share this cache
  56          * Value = 1 indicates the cache is not shared
  57          */
  58         uint32_t        num_cu_shared;
  59 };
  60
  61 static struct kfd_gpu_cache_info kaveri_cache_info[] = {
  62         {
  63                 /* TCP L1 Cache per CU */
  64                 .cache_size = 16,
  65                 .cache_level = 1,
  66                 .flags = (CRAT_CACHE_FLAGS_ENABLED |
  67                                 CRAT_CACHE_FLAGS_DATA_CACHE |
  68                                 CRAT_CACHE_FLAGS_SIMD_CACHE),
  69                 .num_cu_shared = 1,
  70
  71         },
  72         {
  73                 /* Scalar L1 Instruction Cache (in SQC module) per bank */
  74                 .cache_size = 16,
  75                 .cache_level = 1,
  76                 .flags = (CRAT_CACHE_FLAGS_ENABLED |
  77                                 CRAT_CACHE_FLAGS_INST_CACHE |
  78                                 CRAT_CACHE_FLAGS_SIMD_CACHE),
  79                 .num_cu_shared = 2,
  80         },
  81         {
  82                 /* Scalar L1 Data Cache (in SQC module) per bank */
  83                 .cache_size = 8,
  84                 .cache_level = 1,
  85                 .flags = (CRAT_CACHE_FLAGS_ENABLED |
  86                                 CRAT_CACHE_FLAGS_DATA_CACHE |
  87                                 CRAT_CACHE_FLAGS_SIMD_CACHE),
  88                 .num_cu_shared = 2,
  89         },
  90
  91         /* TODO: Add L2 Cache information */
  92 };
  93
  94
  95 static struct kfd_gpu_cache_info carrizo_cache_info[] = {
  96         {
  97                 /* TCP L1 Cache per CU */
  98                 .cache_size = 16,
  99                 .cache_level = 1,
 100                 .flags = (CRAT_CACHE_FLAGS_ENABLED |
 101                                 CRAT_CACHE_FLAGS_DATA_CACHE |
 102                                 CRAT_CACHE_FLAGS_SIMD_CACHE),
 103                 .num_cu_shared = 1,
 104         },
 105         {
 106                 /* Scalar L1 Instruction Cache (in SQC module) per bank */
 107                 .cache_size = 8,
 108                 .cache_level = 1,
 109                 .flags = (CRAT_CACHE_FLAGS_ENABLED |
 110                                 CRAT_CACHE_FLAGS_INST_CACHE |
 111                                 CRAT_CACHE_FLAGS_SIMD_CACHE),
 112                 .num_cu_shared = 4,
 113         },
 114         {
 115                 /* Scalar L1 Data Cache (in SQC module) per bank. */
 116                 .cache_size = 4,
 117                 .cache_level = 1,
 118                 .flags = (CRAT_CACHE_FLAGS_ENABLED |
 119                                 CRAT_CACHE_FLAGS_DATA_CACHE |
 120                                 CRAT_CACHE_FLAGS_SIMD_CACHE),
 121                 .num_cu_shared = 4,
 122         },
 123
 124         /* TODO: Add L2 Cache information */
 125 };
 126
 127 /* NOTE: In future if more information is added to struct kfd_gpu_cache_info
 128  * the following ASICs may need a separate table.
 129  */
 130 #define hawaii_cache_info kaveri_cache_info
 131 #define tonga_cache_info carrizo_cache_info
 132 #define fiji_cache_info  carrizo_cache_info
 133 #define polaris10_cache_info carrizo_cache_info
 134 #define polaris11_cache_info carrizo_cache_info
 135 /* TODO - check & update Vega10 cache details */
 136 #define vega10_cache_info carrizo_cache_info
 137 #define raven_cache_info carrizo_cache_info
 138
 139 static void kfd_populated_cu_info_cpu(struct kfd_topology_device *dev,
 140                 struct crat_subtype_computeunit *cu)
 141 {
 142         dev->node_props.cpu_cores_count = cu->num_cpu_cores;
 143         dev->node_props.cpu_core_id_base = cu->processor_id_low;
 144         if (cu->hsa_capability & CRAT_CU_FLAGS_IOMMU_PRESENT)
 145                 dev->node_props.capability |= HSA_CAP_ATS_PRESENT;
 146
 147         pr_debug("CU CPU: cores=%d id_base=%d\n", cu->num_cpu_cores,
 148                         cu->processor_id_low);
 149 }
 150
 151 static void kfd_populated_cu_info_gpu(struct kfd_topology_device *dev,
 152                 struct crat_subtype_computeunit *cu)
 153 {
 154         dev->node_props.simd_id_base = cu->processor_id_low;
 155         dev->node_props.simd_count = cu->num_simd_cores;
 156         dev->node_props.lds_size_in_kb = cu->lds_size_in_kb;
 157         dev->node_props.max_waves_per_simd = cu->max_waves_simd;
 158         dev->node_props.wave_front_size = cu->wave_front_size;
 159         dev->node_props.array_count = cu->array_count;
 160         dev->node_props.cu_per_simd_array = cu->num_cu_per_array;
 161         dev->node_props.simd_per_cu = cu->num_simd_per_cu;
 162         dev->node_props.max_slots_scratch_cu = cu->max_slots_scatch_cu;
 163         if (cu->hsa_capability & CRAT_CU_FLAGS_HOT_PLUGGABLE)
 164                 dev->node_props.capability |= HSA_CAP_HOT_PLUGGABLE;
 165         pr_debug("CU GPU: id_base=%d\n", cu->processor_id_low);
 166 }
 167
 168 /* kfd_parse_subtype_cu - parse compute unit subtypes and attach it to correct
 169  * topology device present in the device_list
 170  */
 171 static int kfd_parse_subtype_cu(struct crat_subtype_computeunit *cu,
 172                                 struct list_head *device_list)
 173 {
 174         struct kfd_topology_device *dev;
 175
 176         pr_debug("Found CU entry in CRAT table with proximity_domain=%d caps=%x\n",
 177                         cu->proximity_domain, cu->hsa_capability);
 178         list_for_each_entry(dev, device_list, list) {
 179                 if (cu->proximity_domain == dev->proximity_domain) {
 180                         if (cu->flags & CRAT_CU_FLAGS_CPU_PRESENT)
 181                                 kfd_populated_cu_info_cpu(dev, cu);
 182
 183                         if (cu->flags & CRAT_CU_FLAGS_GPU_PRESENT)
 184                                 kfd_populated_cu_info_gpu(dev, cu);
 185                         break;
 186                 }
 187         }
 188
 189         return 0;
 190 }
 191
 192 /* kfd_parse_subtype_mem - parse memory subtypes and attach it to correct
 193  * topology device present in the device_list
 194  */
 195 static int kfd_parse_subtype_mem(struct crat_subtype_memory *mem,
 196                                 struct list_head *device_list)
 197 {
 198         struct kfd_mem_properties *props;
 199         struct kfd_topology_device *dev;
 200
 201         pr_debug("Found memory entry in CRAT table with proximity_domain=%d\n",
 202                         mem->proximity_domain);
 203         list_for_each_entry(dev, device_list, list) {
 204                 if (mem->proximity_domain == dev->proximity_domain) {
 205                         props = kfd_alloc_struct(props);
 206                         if (!props)
 207                                 return -ENOMEM;
 208
 209                         /* We're on GPU node */
 210                         if (dev->node_props.cpu_cores_count == 0) {
 211                                 /* APU */
 212                                 if (mem->visibility_type == 0)
 213                                         props->heap_type =
 214                                                 HSA_MEM_HEAP_TYPE_FB_PRIVATE;
 215                                 /* dGPU */
 216                                 else
 217                                         props->heap_type = mem->visibility_type;
 218                         } else
 219                                 props->heap_type = HSA_MEM_HEAP_TYPE_SYSTEM;
 220
 221                         if (mem->flags & CRAT_MEM_FLAGS_HOT_PLUGGABLE)
 222                                 props->flags |= HSA_MEM_FLAGS_HOT_PLUGGABLE;
 223                         if (mem->flags & CRAT_MEM_FLAGS_NON_VOLATILE)
 224                                 props->flags |= HSA_MEM_FLAGS_NON_VOLATILE;
 225
 226                         props->size_in_bytes =
 227                                 ((uint64_t)mem->length_high << 32) +
 228                                                         mem->length_low;
 229                         props->width = mem->width;
 230
 231                         dev->node_props.mem_banks_count++;
 232                         list_add_tail(&props->list, &dev->mem_props);
 233
 234                         break;
 235                 }
 236         }
 237
 238         return 0;
 239 }
 240
 241 /* kfd_parse_subtype_cache - parse cache subtypes and attach it to correct
 242  * topology device present in the device_list
 243  */
 244 static int kfd_parse_subtype_cache(struct crat_subtype_cache *cache,
 245                         struct list_head *device_list)
 246 {
 247         struct kfd_cache_properties *props;
 248         struct kfd_topology_device *dev;
 249         uint32_t id;
 250         uint32_t total_num_of_cu;
 251
 252         id = cache->processor_id_low;
 253
 254         pr_debug("Found cache entry in CRAT table with processor_id=%d\n", id);
 255         list_for_each_entry(dev, device_list, list) {
 256                 total_num_of_cu = (dev->node_props.array_count *
 257                                         dev->node_props.cu_per_simd_array);
 258
 259                 /* Cache infomration in CRAT doesn't have proximity_domain
 260                  * information as it is associated with a CPU core or GPU
 261                  * Compute Unit. So map the cache using CPU core Id or SIMD
 262                  * (GPU) ID.
 263                  * TODO: This works because currently we can safely assume that
 264                  *  Compute Units are parsed before caches are parsed. In
 265                  *  future, remove this dependency
 266                  */
 267                 if ((id >= dev->node_props.cpu_core_id_base &&
 268                         id <= dev->node_props.cpu_core_id_base +
 269                                 dev->node_props.cpu_cores_count) ||
 270                         (id >= dev->node_props.simd_id_base &&
 271                         id < dev->node_props.simd_id_base +
 272                                 total_num_of_cu)) {
 273                         props = kfd_alloc_struct(props);
 274                         if (!props)
 275                                 return -ENOMEM;
 276
 277                         props->processor_id_low = id;
 278                         props->cache_level = cache->cache_level;
 279                         props->cache_size = cache->cache_size;
 280                         props->cacheline_size = cache->cache_line_size;
 281                         props->cachelines_per_tag = cache->lines_per_tag;
 282                         props->cache_assoc = cache->associativity;
 283                         props->cache_latency = cache->cache_latency;
 284                         memcpy(props->sibling_map, cache->sibling_map,
 285                                         sizeof(props->sibling_map));
 286
 287                         if (cache->flags & CRAT_CACHE_FLAGS_DATA_CACHE)
 288                                 props->cache_type |= HSA_CACHE_TYPE_DATA;
 289                         if (cache->flags & CRAT_CACHE_FLAGS_INST_CACHE)
 290                                 props->cache_type |= HSA_CACHE_TYPE_INSTRUCTION;
 291                         if (cache->flags & CRAT_CACHE_FLAGS_CPU_CACHE)
 292                                 props->cache_type |= HSA_CACHE_TYPE_CPU;
 293                         if (cache->flags & CRAT_CACHE_FLAGS_SIMD_CACHE)
 294                                 props->cache_type |= HSA_CACHE_TYPE_HSACU;
 295
 296                         dev->cache_count++;
 297                         dev->node_props.caches_count++;
 298                         list_add_tail(&props->list, &dev->cache_props);
 299
 300                         break;
 301                 }
 302         }
 303
 304         return 0;
 305 }
 306
 307 /* kfd_parse_subtype_iolink - parse iolink subtypes and attach it to correct
 308  * topology device present in the device_list
 309  */
 310 static int kfd_parse_subtype_iolink(struct crat_subtype_iolink *iolink,
 311                                         struct list_head *device_list)
 312 {
 313         struct kfd_iolink_properties *props = NULL, *props2;
 314         struct kfd_topology_device *dev, *cpu_dev;
 315         uint32_t id_from;
 316         uint32_t id_to;
 317
 318         id_from = iolink->proximity_domain_from;
 319         id_to = iolink->proximity_domain_to;
 320
 321         pr_debug("Found IO link entry in CRAT table with id_from=%d\n",
 322                         id_from);
 323         list_for_each_entry(dev, device_list, list) {
 324                 if (id_from == dev->proximity_domain) {
 325                         props = kfd_alloc_struct(props);
 326                         if (!props)
 327                                 return -ENOMEM;
 328
 329                         props->node_from = id_from;
 330                         props->node_to = id_to;
 331                         props->ver_maj = iolink->version_major;
 332                         props->ver_min = iolink->version_minor;
 333                         props->iolink_type = iolink->io_interface_type;
 334
 335                         if (props->iolink_type == CRAT_IOLINK_TYPE_PCIEXPRESS)
 336                                 props->weight = 20;
 337                         else
 338                                 props->weight = node_distance(id_from, id_to);
 339
 340                         props->min_latency = iolink->minimum_latency;
 341                         props->max_latency = iolink->maximum_latency;
 342                         props->min_bandwidth = iolink->minimum_bandwidth_mbs;
 343                         props->max_bandwidth = iolink->maximum_bandwidth_mbs;
 344                         props->rec_transfer_size =
 345                                         iolink->recommended_transfer_size;
 346
 347                         dev->io_link_count++;
 348                         dev->node_props.io_links_count++;
 349                         list_add_tail(&props->list, &dev->io_link_props);
 350                         break;
 351                 }
 352         }
 353
 354         /* CPU topology is created before GPUs are detected, so CPU->GPU
 355          * links are not built at that time. If a PCIe type is discovered, it
 356          * means a GPU is detected and we are adding GPU->CPU to the topology.
 357          * At this time, also add the corresponded CPU->GPU link.
 358          */
 359         if (props && props->iolink_type == CRAT_IOLINK_TYPE_PCIEXPRESS) {
 360                 cpu_dev = kfd_topology_device_by_proximity_domain(id_to);
 361                 if (!cpu_dev)
 362                         return -ENODEV;
 363                 /* same everything but the other direction */
 364                 props2 = kmemdup(props, sizeof(*props2), GFP_KERNEL);
 365                 props2->node_from = id_to;
 366                 props2->node_to = id_from;
 367                 props2->kobj = NULL;
 368                 cpu_dev->io_link_count++;
 369                 cpu_dev->node_props.io_links_count++;
 370                 list_add_tail(&props2->list, &cpu_dev->io_link_props);
 371         }
 372
 373         return 0;
 374 }
 375
 376 /* kfd_parse_subtype - parse subtypes and attach it to correct topology device
 377  * present in the device_list
 378  *      @sub_type_hdr - subtype section of crat_image
 379  *      @device_list - list of topology devices present in this crat_image
 380  */
 381 static int kfd_parse_subtype(struct crat_subtype_generic *sub_type_hdr,
 382                                 struct list_head *device_list)
 383 {
 384         struct crat_subtype_computeunit *cu;
 385         struct crat_subtype_memory *mem;
 386         struct crat_subtype_cache *cache;
 387         struct crat_subtype_iolink *iolink;
 388         int ret = 0;
 389
 390         switch (sub_type_hdr->type) {
 391         case CRAT_SUBTYPE_COMPUTEUNIT_AFFINITY:
 392                 cu = (struct crat_subtype_computeunit *)sub_type_hdr;
 393                 ret = kfd_parse_subtype_cu(cu, device_list);
 394                 break;
 395         case CRAT_SUBTYPE_MEMORY_AFFINITY:
 396                 mem = (struct crat_subtype_memory *)sub_type_hdr;
 397                 ret = kfd_parse_subtype_mem(mem, device_list);
 398                 break;
 399         case CRAT_SUBTYPE_CACHE_AFFINITY:
 400                 cache = (struct crat_subtype_cache *)sub_type_hdr;
 401                 ret = kfd_parse_subtype_cache(cache, device_list);
 402                 break;
 403         case CRAT_SUBTYPE_TLB_AFFINITY:
 404                 /*
 405                  * For now, nothing to do here
 406                  */
 407                 pr_debug("Found TLB entry in CRAT table (not processing)\n");
 408                 break;
 409         case CRAT_SUBTYPE_CCOMPUTE_AFFINITY:
 410                 /*
 411                  * For now, nothing to do here
 412                  */
 413                 pr_debug("Found CCOMPUTE entry in CRAT table (not processing)\n");
 414                 break;
 415         case CRAT_SUBTYPE_IOLINK_AFFINITY:
 416                 iolink = (struct crat_subtype_iolink *)sub_type_hdr;
 417                 ret = kfd_parse_subtype_iolink(iolink, device_list);
 418                 break;
 419         default:
 420                 pr_warn("Unknown subtype %d in CRAT\n",
 421                                 sub_type_hdr->type);
 422         }
 423
 424         return ret;
 425 }
 426
 427 /* kfd_parse_crat_table - parse CRAT table. For each node present in CRAT
 428  * create a kfd_topology_device and add in to device_list. Also parse
 429  * CRAT subtypes and attach it to appropriate kfd_topology_device
 430  *      @crat_image - input image containing CRAT
 431  *      @device_list - [OUT] list of kfd_topology_device generated after
 432  *                     parsing crat_image
 433  *      @proximity_domain - Proximity domain of the first device in the table
 434  *
 435  *      Return - 0 if successful else -ve value
 436  */
 437 int kfd_parse_crat_table(void *crat_image, struct list_head *device_list,
 438                          uint32_t proximity_domain)
 439 {
 440         struct kfd_topology_device *top_dev = NULL;
 441         struct crat_subtype_generic *sub_type_hdr;
 442         uint16_t node_id;
 443         int ret = 0;
 444         struct crat_header *crat_table = (struct crat_header *)crat_image;
 445         uint16_t num_nodes;
 446         uint32_t image_len;
 447
 448         if (!crat_image)
 449                 return -EINVAL;
 450
 451         if (!list_empty(device_list)) {
 452                 pr_warn("Error device list should be empty\n");
 453                 return -EINVAL;
 454         }
 455
 456         num_nodes = crat_table->num_domains;
 457         image_len = crat_table->length;
 458
 459         pr_info("Parsing CRAT table with %d nodes\n", num_nodes);
 460
 461         for (node_id = 0; node_id < num_nodes; node_id++) {
 462                 top_dev = kfd_create_topology_device(device_list);
 463                 if (!top_dev)
 464                         break;
 465                 top_dev->proximity_domain = proximity_domain++;
 466         }
 467
 468         if (!top_dev) {
 469                 ret = -ENOMEM;
 470                 goto err;
 471         }
 472
 473         memcpy(top_dev->oem_id, crat_table->oem_id, CRAT_OEMID_LENGTH);
 474         memcpy(top_dev->oem_table_id, crat_table->oem_table_id,
 475                         CRAT_OEMTABLEID_LENGTH);
 476         top_dev->oem_revision = crat_table->oem_revision;
 477
 478         sub_type_hdr = (struct crat_subtype_generic *)(crat_table+1);
 479         while ((char *)sub_type_hdr + sizeof(struct crat_subtype_generic) <
 480                         ((char *)crat_image) + image_len) {
 481                 if (sub_type_hdr->flags & CRAT_SUBTYPE_FLAGS_ENABLED) {
 482                         ret = kfd_parse_subtype(sub_type_hdr, device_list);
 483                         if (ret)
 484                                 break;
 485                 }
 486
 487                 sub_type_hdr = (typeof(sub_type_hdr))((char *)sub_type_hdr +
 488                                 sub_type_hdr->length);
 489         }
 490
 491 err:
 492         if (ret)
 493                 kfd_release_topology_device_list(device_list);
 494
 495         return ret;
 496 }
 497
 498 /* Helper function. See kfd_fill_gpu_cache_info for parameter description */
 499 static int fill_in_pcache(struct crat_subtype_cache *pcache,
 500                                 struct kfd_gpu_cache_info *pcache_info,
 501                                 struct kfd_cu_info *cu_info,
 502                                 int mem_available,
 503                                 int cu_bitmask,
 504                                 int cache_type, unsigned int cu_processor_id,
 505                                 int cu_block)
 506 {
 507         unsigned int cu_sibling_map_mask;
 508         int first_active_cu;
 509
 510         /* First check if enough memory is available */
 511         if (sizeof(struct crat_subtype_cache) > mem_available)
 512                 return -ENOMEM;
 513
 514         cu_sibling_map_mask = cu_bitmask;
 515         cu_sibling_map_mask >>= cu_block;
 516         cu_sibling_map_mask &=
 517                 ((1 << pcache_info[cache_type].num_cu_shared) - 1);
 518         first_active_cu = ffs(cu_sibling_map_mask);
 519
 520         /* CU could be inactive. In case of shared cache find the first active
 521          * CU. and incase of non-shared cache check if the CU is inactive. If
 522          * inactive active skip it
 523          */
 524         if (first_active_cu) {
 525                 memset(pcache, 0, sizeof(struct crat_subtype_cache));
 526                 pcache->type = CRAT_SUBTYPE_CACHE_AFFINITY;
 527                 pcache->length = sizeof(struct crat_subtype_cache);
 528                 pcache->flags = pcache_info[cache_type].flags;
 529                 pcache->processor_id_low = cu_processor_id
 530                                          + (first_active_cu - 1);
 531                 pcache->cache_level = pcache_info[cache_type].cache_level;
 532                 pcache->cache_size = pcache_info[cache_type].cache_size;
 533
 534                 /* Sibling map is w.r.t processor_id_low, so shift out
 535                  * inactive CU
 536                  */
 537                 cu_sibling_map_mask =
 538                         cu_sibling_map_mask >> (first_active_cu - 1);
 539
 540                 pcache->sibling_map[0] = (uint8_t)(cu_sibling_map_mask & 0xFF);
 541                 pcache->sibling_map[1] =
 542                                 (uint8_t)((cu_sibling_map_mask >> 8) & 0xFF);
 543                 pcache->sibling_map[2] =
 544                                 (uint8_t)((cu_sibling_map_mask >> 16) & 0xFF);
 545                 pcache->sibling_map[3] =
 546                                 (uint8_t)((cu_sibling_map_mask >> 24) & 0xFF);
 547                 return 0;
 548         }
 549         return 1;
 550 }
 551
 552 /* kfd_fill_gpu_cache_info - Fill GPU cache info using kfd_gpu_cache_info
 553  * tables
 554  *
 555  *      @kdev - [IN] GPU device
 556  *      @gpu_processor_id - [IN] GPU processor ID to which these caches
 557  *                          associate
 558  *      @available_size - [IN] Amount of memory available in pcache
 559  *      @cu_info - [IN] Compute Unit info obtained from KGD
 560  *      @pcache - [OUT] memory into which cache data is to be filled in.
 561  *      @size_filled - [OUT] amount of data used up in pcache.
 562  *      @num_of_entries - [OUT] number of caches added
 563  */
 564 static int kfd_fill_gpu_cache_info(struct kfd_dev *kdev,
 565                         int gpu_processor_id,
 566                         int available_size,
 567                         struct kfd_cu_info *cu_info,
 568                         struct crat_subtype_cache *pcache,
 569                         int *size_filled,
 570                         int *num_of_entries)
 571 {
 572         struct kfd_gpu_cache_info *pcache_info;
 573         int num_of_cache_types = 0;
 574         int i, j, k;
 575         int ct = 0;
 576         int mem_available = available_size;
 577         unsigned int cu_processor_id;
 578         int ret;
 579
 580         switch (kdev->device_info->asic_family) {
 581         case CHIP_KAVERI:
 582                 pcache_info = kaveri_cache_info;
 583                 num_of_cache_types = ARRAY_SIZE(kaveri_cache_info);
 584                 break;
 585         case CHIP_HAWAII:
 586                 pcache_info = hawaii_cache_info;
 587                 num_of_cache_types = ARRAY_SIZE(hawaii_cache_info);
 588                 break;
 589         case CHIP_CARRIZO:
 590                 pcache_info = carrizo_cache_info;
 591                 num_of_cache_types = ARRAY_SIZE(carrizo_cache_info);
 592                 break;
 593         case CHIP_TONGA:
 594                 pcache_info = tonga_cache_info;
 595                 num_of_cache_types = ARRAY_SIZE(tonga_cache_info);
 596                 break;
 597         case CHIP_FIJI:
 598                 pcache_info = fiji_cache_info;
 599                 num_of_cache_types = ARRAY_SIZE(fiji_cache_info);
 600                 break;
 601         case CHIP_POLARIS10:
 602                 pcache_info = polaris10_cache_info;
 603                 num_of_cache_types = ARRAY_SIZE(polaris10_cache_info);
 604                 break;
 605         case CHIP_POLARIS11:
 606                 pcache_info = polaris11_cache_info;
 607                 num_of_cache_types = ARRAY_SIZE(polaris11_cache_info);
 608                 break;
 609         case CHIP_VEGA10:
 610                 pcache_info = vega10_cache_info;
 611                 num_of_cache_types = ARRAY_SIZE(vega10_cache_info);
 612                 break;
 613         case CHIP_RAVEN:
 614                 pcache_info = raven_cache_info;
 615                 num_of_cache_types = ARRAY_SIZE(raven_cache_info);
 616                 break;
 617         default:
 618                 return -EINVAL;
 619         }
 620
 621         *size_filled = 0;
 622         *num_of_entries = 0;
 623
 624         /* For each type of cache listed in the kfd_gpu_cache_info table,
 625          * go through all available Compute Units.
 626          * The [i,j,k] loop will
 627          *              if kfd_gpu_cache_info.num_cu_shared = 1
 628          *                      will parse through all available CU
 629          *              If (kfd_gpu_cache_info.num_cu_shared != 1)
 630          *                      then it will consider only one CU from
 631          *                      the shared unit
 632          */
 633
 634         for (ct = 0; ct < num_of_cache_types; ct++) {
 635                 cu_processor_id = gpu_processor_id;
 636                 for (i = 0; i < cu_info->num_shader_engines; i++) {
 637                         for (j = 0; j < cu_info->num_shader_arrays_per_engine;
 638                                 j++) {
 639                                 for (k = 0; k < cu_info->num_cu_per_sh;
 640                                         k += pcache_info[ct].num_cu_shared) {
 641
 642                                         ret = fill_in_pcache(pcache,
 643                                                 pcache_info,
 644                                                 cu_info,
 645                                                 mem_available,
 646                                                 cu_info->cu_bitmap[i][j],
 647                                                 ct,
 648                                                 cu_processor_id,
 649                                                 k);
 650
 651                                         if (ret < 0)
 652                                                 break;
 653
 654                                         if (!ret) {
 655                                                 pcache++;
 656                                                 (*num_of_entries)++;
 657                                                 mem_available -=
 658                                                         sizeof(*pcache);
 659                                                 (*size_filled) +=
 660                                                         sizeof(*pcache);
 661                                         }
 662
 663                                         /* Move to next CU block */
 664                                         cu_processor_id +=
 665                                                 pcache_info[ct].num_cu_shared;
 666                                 }
 667                         }
 668                 }
 669         }
 670
 671         pr_debug("Added [%d] GPU cache entries\n", *num_of_entries);
 672
 673         return 0;
 674 }
 675
 676 /*
 677  * kfd_create_crat_image_acpi - Allocates memory for CRAT image and
 678  * copies CRAT from ACPI (if available).
 679  * NOTE: Call kfd_destroy_crat_image to free CRAT image memory
 680  *
 681  *      @crat_image: CRAT read from ACPI. If no CRAT in ACPI then
 682  *                   crat_image will be NULL
 683  *      @size: [OUT] size of crat_image
 684  *
 685  *      Return 0 if successful else return error code
 686  */
 687 int kfd_create_crat_image_acpi(void **crat_image, size_t *size)
 688 {
 689         struct acpi_table_header *crat_table;
 690         acpi_status status;
 691         void *pcrat_image;
 692
 693         if (!crat_image)
 694                 return -EINVAL;
 695
 696         *crat_image = NULL;
 697
 698         /* Fetch the CRAT table from ACPI */
 699         status = acpi_get_table(CRAT_SIGNATURE, 0, &crat_table);
 700         if (status == AE_NOT_FOUND) {
 701                 pr_warn("CRAT table not found\n");
 702                 return -ENODATA;
 703         } else if (ACPI_FAILURE(status)) {
 704                 const char *err = acpi_format_exception(status);
 705
 706                 pr_err("CRAT table error: %s\n", err);
 707                 return -EINVAL;
 708         }
 709
 710         if (ignore_crat) {
 711                 pr_info("CRAT table disabled by module option\n");
 712                 return -ENODATA;
 713         }
 714
 715         pcrat_image = kmalloc(crat_table->length, GFP_KERNEL);
 716         if (!pcrat_image)
 717                 return -ENOMEM;
 718
 719         memcpy(pcrat_image, crat_table, crat_table->length);
 720
 721         *crat_image = pcrat_image;
 722         *size = crat_table->length;
 723
 724         return 0;
 725 }
 726
 727 /* Memory required to create Virtual CRAT.
 728  * Since there is no easy way to predict the amount of memory required, the
 729  * following amount are allocated for CPU and GPU Virtual CRAT. This is
 730  * expected to cover all known conditions. But to be safe additional check
 731  * is put in the code to ensure we don't overwrite.
 732  */
 733 #define VCRAT_SIZE_FOR_CPU      (2 * PAGE_SIZE)
 734 #define VCRAT_SIZE_FOR_GPU      (3 * PAGE_SIZE)
 735
 736 /* kfd_fill_cu_for_cpu - Fill in Compute info for the given CPU NUMA node
 737  *
 738  *      @numa_node_id: CPU NUMA node id
 739  *      @avail_size: Available size in the memory
 740  *      @sub_type_hdr: Memory into which compute info will be filled in
 741  *
 742  *      Return 0 if successful else return -ve value
 743  */
 744 static int kfd_fill_cu_for_cpu(int numa_node_id, int *avail_size,
 745                                 int proximity_domain,
 746                                 struct crat_subtype_computeunit *sub_type_hdr)
 747 {
 748         const struct cpumask *cpumask;
 749
 750         *avail_size -= sizeof(struct crat_subtype_computeunit);
 751         if (*avail_size < 0)
 752                 return -ENOMEM;
 753
 754         memset(sub_type_hdr, 0, sizeof(struct crat_subtype_computeunit));
 755
 756         /* Fill in subtype header data */
 757         sub_type_hdr->type = CRAT_SUBTYPE_COMPUTEUNIT_AFFINITY;
 758         sub_type_hdr->length = sizeof(struct crat_subtype_computeunit);
 759         sub_type_hdr->flags = CRAT_SUBTYPE_FLAGS_ENABLED;
 760
 761         cpumask = cpumask_of_node(numa_node_id);
 762
 763         /* Fill in CU data */
 764         sub_type_hdr->flags |= CRAT_CU_FLAGS_CPU_PRESENT;
 765         sub_type_hdr->proximity_domain = proximity_domain;
 766         sub_type_hdr->processor_id_low = kfd_numa_node_to_apic_id(numa_node_id);
 767         if (sub_type_hdr->processor_id_low == -1)
 768                 return -EINVAL;
 769
 770         sub_type_hdr->num_cpu_cores = cpumask_weight(cpumask);
 771
 772         return 0;
 773 }
 774
 775 /* kfd_fill_mem_info_for_cpu - Fill in Memory info for the given CPU NUMA node
 776  *
 777  *      @numa_node_id: CPU NUMA node id
 778  *      @avail_size: Available size in the memory
 779  *      @sub_type_hdr: Memory into which compute info will be filled in
 780  *
 781  *      Return 0 if successful else return -ve value
 782  */
 783 static int kfd_fill_mem_info_for_cpu(int numa_node_id, int *avail_size,
 784                         int proximity_domain,
 785                         struct crat_subtype_memory *sub_type_hdr)
 786 {
 787         uint64_t mem_in_bytes = 0;
 788         pg_data_t *pgdat;
 789         int zone_type;
 790
 791         *avail_size -= sizeof(struct crat_subtype_memory);
 792         if (*avail_size < 0)
 793                 return -ENOMEM;
 794
 795         memset(sub_type_hdr, 0, sizeof(struct crat_subtype_memory));
 796
 797         /* Fill in subtype header data */
 798         sub_type_hdr->type = CRAT_SUBTYPE_MEMORY_AFFINITY;
 799         sub_type_hdr->length = sizeof(struct crat_subtype_memory);
 800         sub_type_hdr->flags = CRAT_SUBTYPE_FLAGS_ENABLED;
 801
 802         /* Fill in Memory Subunit data */
 803
 804         /* Unlike si_meminfo, si_meminfo_node is not exported. So
 805          * the following lines are duplicated from si_meminfo_node
 806          * function
 807          */
 808         pgdat = NODE_DATA(numa_node_id);
 809         for (zone_type = 0; zone_type < MAX_NR_ZONES; zone_type++)
 810                 mem_in_bytes += pgdat->node_zones[zone_type].managed_pages;
 811         mem_in_bytes <<= PAGE_SHIFT;
 812
 813         sub_type_hdr->length_low = lower_32_bits(mem_in_bytes);
 814         sub_type_hdr->length_high = upper_32_bits(mem_in_bytes);
 815         sub_type_hdr->proximity_domain = proximity_domain;
 816
 817         return 0;
 818 }
 819
 820 static int kfd_fill_iolink_info_for_cpu(int numa_node_id, int *avail_size,
 821                                 uint32_t *num_entries,
 822                                 struct crat_subtype_iolink *sub_type_hdr)
 823 {
 824         int nid;
 825         struct cpuinfo_x86 *c = &cpu_data(0);
 826         uint8_t link_type;
 827
 828         if (c->x86_vendor == X86_VENDOR_AMD)
 829                 link_type = CRAT_IOLINK_TYPE_HYPERTRANSPORT;
 830         else
 831                 link_type = CRAT_IOLINK_TYPE_QPI_1_1;
 832
 833         *num_entries = 0;
 834
 835         /* Create IO links from this node to other CPU nodes */
 836         for_each_online_node(nid) {
 837                 if (nid == numa_node_id) /* node itself */
 838                         continue;
 839
 840                 *avail_size -= sizeof(struct crat_subtype_iolink);
 841                 if (*avail_size < 0)
 842                         return -ENOMEM;
 843
 844                 memset(sub_type_hdr, 0, sizeof(struct crat_subtype_iolink));
 845
 846                 /* Fill in subtype header data */
 847                 sub_type_hdr->type = CRAT_SUBTYPE_IOLINK_AFFINITY;
 848                 sub_type_hdr->length = sizeof(struct crat_subtype_iolink);
 849                 sub_type_hdr->flags = CRAT_SUBTYPE_FLAGS_ENABLED;
 850
 851                 /* Fill in IO link data */
 852                 sub_type_hdr->proximity_domain_from = numa_node_id;
 853                 sub_type_hdr->proximity_domain_to = nid;
 854                 sub_type_hdr->io_interface_type = link_type;
 855
 856                 (*num_entries)++;
 857                 sub_type_hdr++;
 858         }
 859
 860         return 0;
 861 }
 862
 863 /* kfd_create_vcrat_image_cpu - Create Virtual CRAT for CPU
 864  *
 865  *      @pcrat_image: Fill in VCRAT for CPU
 866  *      @size:  [IN] allocated size of crat_image.
 867  *              [OUT] actual size of data filled in crat_image
 868  */
 869 static int kfd_create_vcrat_image_cpu(void *pcrat_image, size_t *size)
 870 {
 871         struct crat_header *crat_table = (struct crat_header *)pcrat_image;
 872         struct acpi_table_header *acpi_table;
 873         acpi_status status;
 874         struct crat_subtype_generic *sub_type_hdr;
 875         int avail_size = *size;
 876         int numa_node_id;
 877         uint32_t entries = 0;
 878         int ret = 0;
 879
 880         if (!pcrat_image || avail_size < VCRAT_SIZE_FOR_CPU)
 881                 return -EINVAL;
 882
 883         /* Fill in CRAT Header.
 884          * Modify length and total_entries as subunits are added.
 885          */
 886         avail_size -= sizeof(struct crat_header);
 887         if (avail_size < 0)
 888                 return -ENOMEM;
 889
 890         memset(crat_table, 0, sizeof(struct crat_header));
 891         memcpy(&crat_table->signature, CRAT_SIGNATURE,
 892                         sizeof(crat_table->signature));
 893         crat_table->length = sizeof(struct crat_header);
 894
 895         status = acpi_get_table("DSDT", 0, &acpi_table);
 896         if (status != AE_OK)
 897                 pr_warn("DSDT table not found for OEM information\n");
 898         else {
 899                 crat_table->oem_revision = acpi_table->revision;
 900                 memcpy(crat_table->oem_id, acpi_table->oem_id,
 901                                 CRAT_OEMID_LENGTH);
 902                 memcpy(crat_table->oem_table_id, acpi_table->oem_table_id,
 903                                 CRAT_OEMTABLEID_LENGTH);
 904         }
 905         crat_table->total_entries = 0;
 906         crat_table->num_domains = 0;
 907
 908         sub_type_hdr = (struct crat_subtype_generic *)(crat_table+1);
 909
 910         for_each_online_node(numa_node_id) {
 911                 if (kfd_numa_node_to_apic_id(numa_node_id) == -1)
 912                         continue;
 913
 914                 /* Fill in Subtype: Compute Unit */
 915                 ret = kfd_fill_cu_for_cpu(numa_node_id, &avail_size,
 916                         crat_table->num_domains,
 917                         (struct crat_subtype_computeunit *)sub_type_hdr);
 918                 if (ret < 0)
 919                         return ret;
 920                 crat_table->length += sub_type_hdr->length;
 921                 crat_table->total_entries++;
 922
 923                 sub_type_hdr = (typeof(sub_type_hdr))((char *)sub_type_hdr +
 924                         sub_type_hdr->length);
 925
 926                 /* Fill in Subtype: Memory */
 927                 ret = kfd_fill_mem_info_for_cpu(numa_node_id, &avail_size,
 928                         crat_table->num_domains,
 929                         (struct crat_subtype_memory *)sub_type_hdr);
 930                 if (ret < 0)
 931                         return ret;
 932                 crat_table->length += sub_type_hdr->length;
 933                 crat_table->total_entries++;
 934
 935                 sub_type_hdr = (typeof(sub_type_hdr))((char *)sub_type_hdr +
 936                         sub_type_hdr->length);
 937
 938                 /* Fill in Subtype: IO Link */
 939                 ret = kfd_fill_iolink_info_for_cpu(numa_node_id, &avail_size,
 940                                 &entries,
 941                                 (struct crat_subtype_iolink *)sub_type_hdr);
 942                 if (ret < 0)
 943                         return ret;
 944                 crat_table->length += (sub_type_hdr->length * entries);
 945                 crat_table->total_entries += entries;
 946
 947                 sub_type_hdr = (typeof(sub_type_hdr))((char *)sub_type_hdr +
 948                                 sub_type_hdr->length * entries);
 949
 950                 crat_table->num_domains++;
 951         }
 952
 953         /* TODO: Add cache Subtype for CPU.
 954          * Currently, CPU cache information is available in function
 955          * detect_cache_attributes(cpu) defined in the file
 956          * ./arch/x86/kernel/cpu/intel_cacheinfo.c. This function is not
 957          * exported and to get the same information the code needs to be
 958          * duplicated.
 959          */
 960
 961         *size = crat_table->length;
 962         pr_info("Virtual CRAT table created for CPU\n");
 963
 964         return 0;
 965 }
 966
 967 static int kfd_fill_gpu_memory_affinity(int *avail_size,
 968                 struct kfd_dev *kdev, uint8_t type, uint64_t size,
 969                 struct crat_subtype_memory *sub_type_hdr,
 970                 uint32_t proximity_domain,
 971                 const struct kfd_local_mem_info *local_mem_info)
 972 {
 973         *avail_size -= sizeof(struct crat_subtype_memory);
 974         if (*avail_size < 0)
 975                 return -ENOMEM;
 976
 977         memset((void *)sub_type_hdr, 0, sizeof(struct crat_subtype_memory));
 978         sub_type_hdr->type = CRAT_SUBTYPE_MEMORY_AFFINITY;
 979         sub_type_hdr->length = sizeof(struct crat_subtype_memory);
 980         sub_type_hdr->flags |= CRAT_SUBTYPE_FLAGS_ENABLED;
 981
 982         sub_type_hdr->proximity_domain = proximity_domain;
 983
 984         pr_debug("Fill gpu memory affinity - type 0x%x size 0x%llx\n",
 985                         type, size);
 986
 987         sub_type_hdr->length_low = lower_32_bits(size);
 988         sub_type_hdr->length_high = upper_32_bits(size);
 989
 990         sub_type_hdr->width = local_mem_info->vram_width;
 991         sub_type_hdr->visibility_type = type;
 992
 993         return 0;
 994 }
 995
 996 /* kfd_fill_gpu_direct_io_link - Fill in direct io link from GPU
 997  * to its NUMA node
 998  *      @avail_size: Available size in the memory
 999  *      @kdev - [IN] GPU device
1000  *      @sub_type_hdr: Memory into which io link info will be filled in
1001  *      @proximity_domain - proximity domain of the GPU node
1002  *
1003  *      Return 0 if successful else return -ve value
1004  */
1005 static int kfd_fill_gpu_direct_io_link(int *avail_size,
1006                         struct kfd_dev *kdev,
1007                         struct crat_subtype_iolink *sub_type_hdr,
1008                         uint32_t proximity_domain)
1009 {
1010         *avail_size -= sizeof(struct crat_subtype_iolink);
1011         if (*avail_size < 0)
1012                 return -ENOMEM;
1013
1014         memset((void *)sub_type_hdr, 0, sizeof(struct crat_subtype_iolink));
1015
1016         /* Fill in subtype header data */
1017         sub_type_hdr->type = CRAT_SUBTYPE_IOLINK_AFFINITY;
1018         sub_type_hdr->length = sizeof(struct crat_subtype_iolink);
1019         sub_type_hdr->flags |= CRAT_SUBTYPE_FLAGS_ENABLED;
1020
1021         /* Fill in IOLINK subtype.
1022          * TODO: Fill-in other fields of iolink subtype
1023          */
1024         sub_type_hdr->io_interface_type = CRAT_IOLINK_TYPE_PCIEXPRESS;
1025         sub_type_hdr->proximity_domain_from = proximity_domain;
1026 #ifdef CONFIG_NUMA
1027         if (kdev->pdev->dev.numa_node == NUMA_NO_NODE)
1028                 sub_type_hdr->proximity_domain_to = 0;
1029         else
1030                 sub_type_hdr->proximity_domain_to = kdev->pdev->dev.numa_node;
1031 #else
1032         sub_type_hdr->proximity_domain_to = 0;
1033 #endif
1034         return 0;
1035 }
1036
1037 /* kfd_create_vcrat_image_gpu - Create Virtual CRAT for CPU
1038  *
1039  *      @pcrat_image: Fill in VCRAT for GPU
1040  *      @size:  [IN] allocated size of crat_image.
1041  *              [OUT] actual size of data filled in crat_image
1042  */
1043 static int kfd_create_vcrat_image_gpu(void *pcrat_image,
1044                                       size_t *size, struct kfd_dev *kdev,
1045                                       uint32_t proximity_domain)
1046 {
1047         struct crat_header *crat_table = (struct crat_header *)pcrat_image;
1048         struct crat_subtype_generic *sub_type_hdr;
1049         struct crat_subtype_computeunit *cu;
1050         struct kfd_cu_info cu_info;
1051         int avail_size = *size;
1052         uint32_t total_num_of_cu;
1053         int num_of_cache_entries = 0;
1054         int cache_mem_filled = 0;
1055         int ret = 0;
1056         struct kfd_local_mem_info local_mem_info;
1057
1058         if (!pcrat_image || avail_size < VCRAT_SIZE_FOR_GPU)
1059                 return -EINVAL;
1060
1061         /* Fill the CRAT Header.
1062          * Modify length and total_entries as subunits are added.
1063          */
1064         avail_size -= sizeof(struct crat_header);
1065         if (avail_size < 0)
1066                 return -ENOMEM;
1067
1068         memset(crat_table, 0, sizeof(struct crat_header));
1069
1070         memcpy(&crat_table->signature, CRAT_SIGNATURE,
1071                         sizeof(crat_table->signature));
1072         /* Change length as we add more subtypes*/
1073         crat_table->length = sizeof(struct crat_header);
1074         crat_table->num_domains = 1;
1075         crat_table->total_entries = 0;
1076
1077         /* Fill in Subtype: Compute Unit
1078          * First fill in the sub type header and then sub type data
1079          */
1080         avail_size -= sizeof(struct crat_subtype_computeunit);
1081         if (avail_size < 0)
1082                 return -ENOMEM;
1083
1084         sub_type_hdr = (struct crat_subtype_generic *)(crat_table + 1);
1085         memset(sub_type_hdr, 0, sizeof(struct crat_subtype_computeunit));
1086
1087         sub_type_hdr->type = CRAT_SUBTYPE_COMPUTEUNIT_AFFINITY;
1088         sub_type_hdr->length = sizeof(struct crat_subtype_computeunit);
1089         sub_type_hdr->flags = CRAT_SUBTYPE_FLAGS_ENABLED;
1090
1091         /* Fill CU subtype data */
1092         cu = (struct crat_subtype_computeunit *)sub_type_hdr;
1093         cu->flags |= CRAT_CU_FLAGS_GPU_PRESENT;
1094         cu->proximity_domain = proximity_domain;
1095
1096         kdev->kfd2kgd->get_cu_info(kdev->kgd, &cu_info);
1097         cu->num_simd_per_cu = cu_info.simd_per_cu;
1098         cu->num_simd_cores = cu_info.simd_per_cu * cu_info.cu_active_number;
1099         cu->max_waves_simd = cu_info.max_waves_per_simd;
1100
1101         cu->wave_front_size = cu_info.wave_front_size;
1102         cu->array_count = cu_info.num_shader_arrays_per_engine *
1103                 cu_info.num_shader_engines;
1104         total_num_of_cu = (cu->array_count * cu_info.num_cu_per_sh);
1105         cu->processor_id_low = get_and_inc_gpu_processor_id(total_num_of_cu);
1106         cu->num_cu_per_array = cu_info.num_cu_per_sh;
1107         cu->max_slots_scatch_cu = cu_info.max_scratch_slots_per_cu;
1108         cu->num_banks = cu_info.num_shader_engines;
1109         cu->lds_size_in_kb = cu_info.lds_size;
1110
1111         cu->hsa_capability = 0;
1112
1113         /* Check if this node supports IOMMU. During parsing this flag will
1114          * translate to HSA_CAP_ATS_PRESENT
1115          */
1116         if (!kfd_iommu_check_device(kdev))
1117                 cu->hsa_capability |= CRAT_CU_FLAGS_IOMMU_PRESENT;
1118
1119         crat_table->length += sub_type_hdr->length;
1120         crat_table->total_entries++;
1121
1122         /* Fill in Subtype: Memory. Only on systems with large BAR (no
1123          * private FB), report memory as public. On other systems
1124          * report the total FB size (public+private) as a single
1125          * private heap.
1126          */
1127         kdev->kfd2kgd->get_local_mem_info(kdev->kgd, &local_mem_info);
1128         sub_type_hdr = (typeof(sub_type_hdr))((char *)sub_type_hdr +
1129                         sub_type_hdr->length);
1130
1131         if (debug_largebar)
1132                 local_mem_info.local_mem_size_private = 0;
1133
1134         if (local_mem_info.local_mem_size_private == 0)
1135                 ret = kfd_fill_gpu_memory_affinity(&avail_size,
1136                                 kdev, HSA_MEM_HEAP_TYPE_FB_PUBLIC,
1137                                 local_mem_info.local_mem_size_public,
1138                                 (struct crat_subtype_memory *)sub_type_hdr,
1139                                 proximity_domain,
1140                                 &local_mem_info);
1141         else
1142                 ret = kfd_fill_gpu_memory_affinity(&avail_size,
1143                                 kdev, HSA_MEM_HEAP_TYPE_FB_PRIVATE,
1144                                 local_mem_info.local_mem_size_public +
1145                                 local_mem_info.local_mem_size_private,
1146                                 (struct crat_subtype_memory *)sub_type_hdr,
1147                                 proximity_domain,
1148                                 &local_mem_info);
1149         if (ret < 0)
1150                 return ret;
1151
1152         crat_table->length += sizeof(struct crat_subtype_memory);
1153         crat_table->total_entries++;
1154
1155         /* TODO: Fill in cache information. This information is NOT readily
1156          * available in KGD
1157          */
1158         sub_type_hdr = (typeof(sub_type_hdr))((char *)sub_type_hdr +
1159                 sub_type_hdr->length);
1160         ret = kfd_fill_gpu_cache_info(kdev, cu->processor_id_low,
1161                                 avail_size,
1162                                 &cu_info,
1163                                 (struct crat_subtype_cache *)sub_type_hdr,
1164                                 &cache_mem_filled,
1165                                 &num_of_cache_entries);
1166
1167         if (ret < 0)
1168                 return ret;
1169
1170         crat_table->length += cache_mem_filled;
1171         crat_table->total_entries += num_of_cache_entries;
1172         avail_size -= cache_mem_filled;
1173
1174         /* Fill in Subtype: IO_LINKS
1175          *  Only direct links are added here which is Link from GPU to
1176          *  to its NUMA node. Indirect links are added by userspace.
1177          */
1178         sub_type_hdr = (typeof(sub_type_hdr))((char *)sub_type_hdr +
1179                 cache_mem_filled);
1180         ret = kfd_fill_gpu_direct_io_link(&avail_size, kdev,
1181                 (struct crat_subtype_iolink *)sub_type_hdr, proximity_domain);
1182
1183         if (ret < 0)
1184                 return ret;
1185
1186         crat_table->length += sub_type_hdr->length;
1187         crat_table->total_entries++;
1188
1189         *size = crat_table->length;
1190         pr_info("Virtual CRAT table created for GPU\n");
1191
1192         return ret;
1193 }
1194
1195 /* kfd_create_crat_image_virtual - Allocates memory for CRAT image and
1196  *              creates a Virtual CRAT (VCRAT) image
1197  *
1198  * NOTE: Call kfd_destroy_crat_image to free CRAT image memory
1199  *
1200  *      @crat_image: VCRAT image created because ACPI does not have a
1201  *                   CRAT for this device
1202  *      @size: [OUT] size of virtual crat_image
1203  *      @flags: COMPUTE_UNIT_CPU - Create VCRAT for CPU device
1204  *              COMPUTE_UNIT_GPU - Create VCRAT for GPU
1205  *              (COMPUTE_UNIT_CPU | COMPUTE_UNIT_GPU) - Create VCRAT for APU
1206  *                      -- this option is not currently implemented.
1207  *                      The assumption is that all AMD APUs will have CRAT
1208  *      @kdev: Valid kfd_device required if flags contain COMPUTE_UNIT_GPU
1209  *
1210  *      Return 0 if successful else return -ve value
1211  */
1212 int kfd_create_crat_image_virtual(void **crat_image, size_t *size,
1213                                   int flags, struct kfd_dev *kdev,
1214                                   uint32_t proximity_domain)
1215 {
1216         void *pcrat_image = NULL;
1217         int ret = 0;
1218
1219         if (!crat_image)
1220                 return -EINVAL;
1221
1222         *crat_image = NULL;
1223
1224         /* Allocate one VCRAT_SIZE_FOR_CPU for CPU virtual CRAT image and
1225          * VCRAT_SIZE_FOR_GPU for GPU virtual CRAT image. This should cover
1226          * all the current conditions. A check is put not to overwrite beyond
1227          * allocated size
1228          */
1229         switch (flags) {
1230         case COMPUTE_UNIT_CPU:
1231                 pcrat_image = kmalloc(VCRAT_SIZE_FOR_CPU, GFP_KERNEL);
1232                 if (!pcrat_image)
1233                         return -ENOMEM;
1234                 *size = VCRAT_SIZE_FOR_CPU;
1235                 ret = kfd_create_vcrat_image_cpu(pcrat_image, size);
1236                 break;
1237         case COMPUTE_UNIT_GPU:
1238                 if (!kdev)
1239                         return -EINVAL;
1240                 pcrat_image = kmalloc(VCRAT_SIZE_FOR_GPU, GFP_KERNEL);
1241                 if (!pcrat_image)
1242                         return -ENOMEM;
1243                 *size = VCRAT_SIZE_FOR_GPU;
1244                 ret = kfd_create_vcrat_image_gpu(pcrat_image, size, kdev,
1245                                                  proximity_domain);
1246                 break;
1247         case (COMPUTE_UNIT_CPU | COMPUTE_UNIT_GPU):
1248                 /* TODO: */
1249                 ret = -EINVAL;
1250                 pr_err("VCRAT not implemented for APU\n");
1251                 break;
1252         default:
1253                 ret = -EINVAL;
1254         }
1255
1256         if (!ret)
1257                 *crat_image = pcrat_image;
1258         else
1259                 kfree(pcrat_image);
1260
1261         return ret;
1262 }
1263
1264
1265 /* kfd_destroy_crat_image
1266  *
1267  *      @crat_image: [IN] - crat_image from kfd_create_crat_image_xxx(..)
1268  *
1269  */
1270 void kfd_destroy_crat_image(void *crat_image)
1271 {
1272         kfree(crat_image);
1273 }