drivers/gpu/drm/i915/i915_query.c

   1 /*
   2  * SPDX-License-Identifier: MIT
   3  *
   4  * Copyright © 2018 Intel Corporation
   5  */
   6
   7 #include <linux/nospec.h>
   8
   9 #include "i915_drv.h"
  10 #include "i915_perf.h"
  11 #include "i915_query.h"
  12 #include "gt/intel_engine_user.h"
  13 #include <uapi/drm/i915_drm.h>
  14
  15 static int copy_query_item(void *query_hdr, size_t query_sz,
  16                            u32 total_length,
  17                            struct drm_i915_query_item *query_item)
  18 {
  19         if (query_item->length == 0)
  20                 return total_length;
  21
  22         if (query_item->length < total_length)
  23                 return -EINVAL;
  24
  25         if (copy_from_user(query_hdr, u64_to_user_ptr(query_item->data_ptr),
  26                            query_sz))
  27                 return -EFAULT;
  28
  29         return 0;
  30 }
  31
  32 static int fill_topology_info(const struct sseu_dev_info *sseu,
  33                               struct drm_i915_query_item *query_item,
  34                               intel_sseu_ss_mask_t subslice_mask)
  35 {
  36         struct drm_i915_query_topology_info topo;
  37         u32 slice_length, subslice_length, eu_length, total_length;
  38         int ss_stride = GEN_SSEU_STRIDE(sseu->max_subslices);
  39         int eu_stride = GEN_SSEU_STRIDE(sseu->max_eus_per_subslice);
  40         int ret;
  41
  42         BUILD_BUG_ON(sizeof(u8) != sizeof(sseu->slice_mask));
  43
  44         if (sseu->max_slices == 0)
  45                 return -ENODEV;
  46
  47         slice_length = sizeof(sseu->slice_mask);
  48         subslice_length = sseu->max_slices * ss_stride;
  49         eu_length = sseu->max_slices * sseu->max_subslices * eu_stride;
  50         total_length = sizeof(topo) + slice_length + subslice_length +
  51                        eu_length;
  52
  53         ret = copy_query_item(&topo, sizeof(topo), total_length, query_item);
  54
  55         if (ret != 0)
  56                 return ret;
  57
  58         memset(&topo, 0, sizeof(topo));
  59         topo.max_slices = sseu->max_slices;
  60         topo.max_subslices = sseu->max_subslices;
  61         topo.max_eus_per_subslice = sseu->max_eus_per_subslice;
  62
  63         topo.subslice_offset = slice_length;
  64         topo.subslice_stride = ss_stride;
  65         topo.eu_offset = slice_length + subslice_length;
  66         topo.eu_stride = eu_stride;
  67
  68         if (copy_to_user(u64_to_user_ptr(query_item->data_ptr),
  69                          &topo, sizeof(topo)))
  70                 return -EFAULT;
  71
  72         if (copy_to_user(u64_to_user_ptr(query_item->data_ptr + sizeof(topo)),
  73                          &sseu->slice_mask, slice_length))
  74                 return -EFAULT;
  75
  76         if (intel_sseu_copy_ssmask_to_user(u64_to_user_ptr(query_item->data_ptr +
  77                                                            sizeof(topo) + slice_length),
  78                                            sseu))
  79                 return -EFAULT;
  80
  81         if (intel_sseu_copy_eumask_to_user(u64_to_user_ptr(query_item->data_ptr +
  82                                                            sizeof(topo) +
  83                                                            slice_length + subslice_length),
  84                                            sseu))
  85                 return -EFAULT;
  86
  87         return total_length;
  88 }
  89
  90 static int query_topology_info(struct drm_i915_private *dev_priv,
  91                                struct drm_i915_query_item *query_item)
  92 {
  93         const struct sseu_dev_info *sseu = &to_gt(dev_priv)->info.sseu;
  94
  95         if (query_item->flags != 0)
  96                 return -EINVAL;
  97
  98         return fill_topology_info(sseu, query_item, sseu->subslice_mask);
  99 }
 100
 101 static int query_geometry_subslices(struct drm_i915_private *i915,
 102                                     struct drm_i915_query_item *query_item)
 103 {
 104         const struct sseu_dev_info *sseu;
 105         struct intel_engine_cs *engine;
 106         struct i915_engine_class_instance classinstance;
 107
 108         if (GRAPHICS_VER_FULL(i915) < IP_VER(12, 50))
 109                 return -ENODEV;
 110
 111         classinstance = *((struct i915_engine_class_instance *)&query_item->flags);
 112
 113         engine = intel_engine_lookup_user(i915, (u8)classinstance.engine_class,
 114                                           (u8)classinstance.engine_instance);
 115
 116         if (!engine)
 117                 return -EINVAL;
 118
 119         if (engine->class != RENDER_CLASS)
 120                 return -EINVAL;
 121
 122         sseu = &engine->gt->info.sseu;
 123
 124         return fill_topology_info(sseu, query_item, sseu->geometry_subslice_mask);
 125 }
 126
 127 static int
 128 query_engine_info(struct drm_i915_private *i915,
 129                   struct drm_i915_query_item *query_item)
 130 {
 131         struct drm_i915_query_engine_info __user *query_ptr =
 132                                 u64_to_user_ptr(query_item->data_ptr);
 133         struct drm_i915_engine_info __user *info_ptr;
 134         struct drm_i915_query_engine_info query;
 135         struct drm_i915_engine_info info = { };
 136         unsigned int num_uabi_engines = 0;
 137         struct intel_engine_cs *engine;
 138         int len, ret;
 139
 140         if (query_item->flags)
 141                 return -EINVAL;
 142
 143         for_each_uabi_engine(engine, i915)
 144                 num_uabi_engines++;
 145
 146         len = struct_size(query_ptr, engines, num_uabi_engines);
 147
 148         ret = copy_query_item(&query, sizeof(query), len, query_item);
 149         if (ret != 0)
 150                 return ret;
 151
 152         if (query.num_engines || query.rsvd[0] || query.rsvd[1] ||
 153             query.rsvd[2])
 154                 return -EINVAL;
 155
 156         info_ptr = &query_ptr->engines[0];
 157
 158         for_each_uabi_engine(engine, i915) {
 159                 info.engine.engine_class = engine->uabi_class;
 160                 info.engine.engine_instance = engine->uabi_instance;
 161                 info.flags = I915_ENGINE_INFO_HAS_LOGICAL_INSTANCE;
 162                 info.capabilities = engine->uabi_capabilities;
 163                 info.logical_instance = ilog2(engine->logical_mask);
 164
 165                 if (copy_to_user(info_ptr, &info, sizeof(info)))
 166                         return -EFAULT;
 167
 168                 query.num_engines++;
 169                 info_ptr++;
 170         }
 171
 172         if (copy_to_user(query_ptr, &query, sizeof(query)))
 173                 return -EFAULT;
 174
 175         return len;
 176 }
 177
 178 static int can_copy_perf_config_registers_or_number(u32 user_n_regs,
 179                                                     u64 user_regs_ptr,
 180                                                     u32 kernel_n_regs)
 181 {
 182         /*
 183          * We'll just put the number of registers, and won't copy the
 184          * register.
 185          */
 186         if (user_n_regs == 0)
 187                 return 0;
 188
 189         if (user_n_regs < kernel_n_regs)
 190                 return -EINVAL;
 191
 192         return 0;
 193 }
 194
 195 static int copy_perf_config_registers_or_number(const struct i915_oa_reg *kernel_regs,
 196                                                 u32 kernel_n_regs,
 197                                                 u64 user_regs_ptr,
 198                                                 u32 *user_n_regs)
 199 {
 200         u32 __user *p = u64_to_user_ptr(user_regs_ptr);
 201         u32 r;
 202
 203         if (*user_n_regs == 0) {
 204                 *user_n_regs = kernel_n_regs;
 205                 return 0;
 206         }
 207
 208         *user_n_regs = kernel_n_regs;
 209
 210         if (!user_write_access_begin(p, 2 * sizeof(u32) * kernel_n_regs))
 211                 return -EFAULT;
 212
 213         for (r = 0; r < kernel_n_regs; r++, p += 2) {
 214                 unsafe_put_user(i915_mmio_reg_offset(kernel_regs[r].addr),
 215                                 p, Efault);
 216                 unsafe_put_user(kernel_regs[r].value, p + 1, Efault);
 217         }
 218         user_write_access_end();
 219         return 0;
 220 Efault:
 221         user_write_access_end();
 222         return -EFAULT;
 223 }
 224
 225 static int query_perf_config_data(struct drm_i915_private *i915,
 226                                   struct drm_i915_query_item *query_item,
 227                                   bool use_uuid)
 228 {
 229         struct drm_i915_query_perf_config __user *user_query_config_ptr =
 230                 u64_to_user_ptr(query_item->data_ptr);
 231         struct drm_i915_perf_oa_config __user *user_config_ptr =
 232                 u64_to_user_ptr(query_item->data_ptr +
 233                                 sizeof(struct drm_i915_query_perf_config));
 234         struct drm_i915_perf_oa_config user_config;
 235         struct i915_perf *perf = &i915->perf;
 236         struct i915_oa_config *oa_config;
 237         char uuid[UUID_STRING_LEN + 1];
 238         u64 config_id;
 239         u32 flags, total_size;
 240         int ret;
 241
 242         if (!perf->i915)
 243                 return -ENODEV;
 244
 245         total_size =
 246                 sizeof(struct drm_i915_query_perf_config) +
 247                 sizeof(struct drm_i915_perf_oa_config);
 248
 249         if (query_item->length == 0)
 250                 return total_size;
 251
 252         if (query_item->length < total_size) {
 253                 DRM_DEBUG("Invalid query config data item size=%u expected=%u\n",
 254                           query_item->length, total_size);
 255                 return -EINVAL;
 256         }
 257
 258         if (get_user(flags, &user_query_config_ptr->flags))
 259                 return -EFAULT;
 260
 261         if (flags != 0)
 262                 return -EINVAL;
 263
 264         if (use_uuid) {
 265                 struct i915_oa_config *tmp;
 266                 int id;
 267
 268                 BUILD_BUG_ON(sizeof(user_query_config_ptr->uuid) >= sizeof(uuid));
 269
 270                 memset(&uuid, 0, sizeof(uuid));
 271                 if (copy_from_user(uuid, user_query_config_ptr->uuid,
 272                                      sizeof(user_query_config_ptr->uuid)))
 273                         return -EFAULT;
 274
 275                 oa_config = NULL;
 276                 rcu_read_lock();
 277                 idr_for_each_entry(&perf->metrics_idr, tmp, id) {
 278                         if (!strcmp(tmp->uuid, uuid)) {
 279                                 oa_config = i915_oa_config_get(tmp);
 280                                 break;
 281                         }
 282                 }
 283                 rcu_read_unlock();
 284         } else {
 285                 if (get_user(config_id, &user_query_config_ptr->config))
 286                         return -EFAULT;
 287
 288                 oa_config = i915_perf_get_oa_config(perf, config_id);
 289         }
 290         if (!oa_config)
 291                 return -ENOENT;
 292
 293         if (copy_from_user(&user_config, user_config_ptr, sizeof(user_config))) {
 294                 ret = -EFAULT;
 295                 goto out;
 296         }
 297
 298         ret = can_copy_perf_config_registers_or_number(user_config.n_boolean_regs,
 299                                                        user_config.boolean_regs_ptr,
 300                                                        oa_config->b_counter_regs_len);
 301         if (ret)
 302                 goto out;
 303
 304         ret = can_copy_perf_config_registers_or_number(user_config.n_flex_regs,
 305                                                        user_config.flex_regs_ptr,
 306                                                        oa_config->flex_regs_len);
 307         if (ret)
 308                 goto out;
 309
 310         ret = can_copy_perf_config_registers_or_number(user_config.n_mux_regs,
 311                                                        user_config.mux_regs_ptr,
 312                                                        oa_config->mux_regs_len);
 313         if (ret)
 314                 goto out;
 315
 316         ret = copy_perf_config_registers_or_number(oa_config->b_counter_regs,
 317                                                    oa_config->b_counter_regs_len,
 318                                                    user_config.boolean_regs_ptr,
 319                                                    &user_config.n_boolean_regs);
 320         if (ret)
 321                 goto out;
 322
 323         ret = copy_perf_config_registers_or_number(oa_config->flex_regs,
 324                                                    oa_config->flex_regs_len,
 325                                                    user_config.flex_regs_ptr,
 326                                                    &user_config.n_flex_regs);
 327         if (ret)
 328                 goto out;
 329
 330         ret = copy_perf_config_registers_or_number(oa_config->mux_regs,
 331                                                    oa_config->mux_regs_len,
 332                                                    user_config.mux_regs_ptr,
 333                                                    &user_config.n_mux_regs);
 334         if (ret)
 335                 goto out;
 336
 337         memcpy(user_config.uuid, oa_config->uuid, sizeof(user_config.uuid));
 338
 339         if (copy_to_user(user_config_ptr, &user_config, sizeof(user_config))) {
 340                 ret = -EFAULT;
 341                 goto out;
 342         }
 343
 344         ret = total_size;
 345
 346 out:
 347         i915_oa_config_put(oa_config);
 348         return ret;
 349 }
 350
 351 static size_t sizeof_perf_config_list(size_t count)
 352 {
 353         return sizeof(struct drm_i915_query_perf_config) + sizeof(u64) * count;
 354 }
 355
 356 static size_t sizeof_perf_metrics(struct i915_perf *perf)
 357 {
 358         struct i915_oa_config *tmp;
 359         size_t i;
 360         int id;
 361
 362         i = 1;
 363         rcu_read_lock();
 364         idr_for_each_entry(&perf->metrics_idr, tmp, id)
 365                 i++;
 366         rcu_read_unlock();
 367
 368         return sizeof_perf_config_list(i);
 369 }
 370
 371 static int query_perf_config_list(struct drm_i915_private *i915,
 372                                   struct drm_i915_query_item *query_item)
 373 {
 374         struct drm_i915_query_perf_config __user *user_query_config_ptr =
 375                 u64_to_user_ptr(query_item->data_ptr);
 376         struct i915_perf *perf = &i915->perf;
 377         u64 *oa_config_ids = NULL;
 378         int alloc, n_configs;
 379         u32 flags;
 380         int ret;
 381
 382         if (!perf->i915)
 383                 return -ENODEV;
 384
 385         if (query_item->length == 0)
 386                 return sizeof_perf_metrics(perf);
 387
 388         if (get_user(flags, &user_query_config_ptr->flags))
 389                 return -EFAULT;
 390
 391         if (flags != 0)
 392                 return -EINVAL;
 393
 394         n_configs = 1;
 395         do {
 396                 struct i915_oa_config *tmp;
 397                 u64 *ids;
 398                 int id;
 399
 400                 ids = krealloc(oa_config_ids,
 401                                n_configs * sizeof(*oa_config_ids),
 402                                GFP_KERNEL);
 403                 if (!ids)
 404                         return -ENOMEM;
 405
 406                 alloc = fetch_and_zero(&n_configs);
 407
 408                 ids[n_configs++] = 1ull; /* reserved for test_config */
 409                 rcu_read_lock();
 410                 idr_for_each_entry(&perf->metrics_idr, tmp, id) {
 411                         if (n_configs < alloc)
 412                                 ids[n_configs] = id;
 413                         n_configs++;
 414                 }
 415                 rcu_read_unlock();
 416
 417                 oa_config_ids = ids;
 418         } while (n_configs > alloc);
 419
 420         if (query_item->length < sizeof_perf_config_list(n_configs)) {
 421                 DRM_DEBUG("Invalid query config list item size=%u expected=%zu\n",
 422                           query_item->length,
 423                           sizeof_perf_config_list(n_configs));
 424                 kfree(oa_config_ids);
 425                 return -EINVAL;
 426         }
 427
 428         if (put_user(n_configs, &user_query_config_ptr->config)) {
 429                 kfree(oa_config_ids);
 430                 return -EFAULT;
 431         }
 432
 433         ret = copy_to_user(user_query_config_ptr + 1,
 434                            oa_config_ids,
 435                            n_configs * sizeof(*oa_config_ids));
 436         kfree(oa_config_ids);
 437         if (ret)
 438                 return -EFAULT;
 439
 440         return sizeof_perf_config_list(n_configs);
 441 }
 442
 443 static int query_perf_config(struct drm_i915_private *i915,
 444                              struct drm_i915_query_item *query_item)
 445 {
 446         switch (query_item->flags) {
 447         case DRM_I915_QUERY_PERF_CONFIG_LIST:
 448                 return query_perf_config_list(i915, query_item);
 449         case DRM_I915_QUERY_PERF_CONFIG_DATA_FOR_UUID:
 450                 return query_perf_config_data(i915, query_item, true);
 451         case DRM_I915_QUERY_PERF_CONFIG_DATA_FOR_ID:
 452                 return query_perf_config_data(i915, query_item, false);
 453         default:
 454                 return -EINVAL;
 455         }
 456 }
 457
 458 static int query_memregion_info(struct drm_i915_private *i915,
 459                                 struct drm_i915_query_item *query_item)
 460 {
 461         struct drm_i915_query_memory_regions __user *query_ptr =
 462                 u64_to_user_ptr(query_item->data_ptr);
 463         struct drm_i915_memory_region_info __user *info_ptr =
 464                 &query_ptr->regions[0];
 465         struct drm_i915_memory_region_info info = { };
 466         struct drm_i915_query_memory_regions query;
 467         struct intel_memory_region *mr;
 468         u32 total_length;
 469         int ret, id, i;
 470
 471         if (query_item->flags != 0)
 472                 return -EINVAL;
 473
 474         total_length = sizeof(query);
 475         for_each_memory_region(mr, i915, id) {
 476                 if (mr->private)
 477                         continue;
 478
 479                 total_length += sizeof(info);
 480         }
 481
 482         ret = copy_query_item(&query, sizeof(query), total_length, query_item);
 483         if (ret != 0)
 484                 return ret;
 485
 486         if (query.num_regions)
 487                 return -EINVAL;
 488
 489         for (i = 0; i < ARRAY_SIZE(query.rsvd); i++) {
 490                 if (query.rsvd[i])
 491                         return -EINVAL;
 492         }
 493
 494         for_each_memory_region(mr, i915, id) {
 495                 if (mr->private)
 496                         continue;
 497
 498                 info.region.memory_class = mr->type;
 499                 info.region.memory_instance = mr->instance;
 500                 info.probed_size = mr->total;
 501
 502                 if (mr->type == INTEL_MEMORY_LOCAL)
 503                         info.probed_cpu_visible_size = mr->io_size;
 504                 else
 505                         info.probed_cpu_visible_size = mr->total;
 506
 507                 if (perfmon_capable()) {
 508                         intel_memory_region_avail(mr,
 509                                                   &info.unallocated_size,
 510                                                   &info.unallocated_cpu_visible_size);
 511                 } else {
 512                         info.unallocated_size = info.probed_size;
 513                         info.unallocated_cpu_visible_size =
 514                                 info.probed_cpu_visible_size;
 515                 }
 516
 517                 if (__copy_to_user(info_ptr, &info, sizeof(info)))
 518                         return -EFAULT;
 519
 520                 query.num_regions++;
 521                 info_ptr++;
 522         }
 523
 524         if (__copy_to_user(query_ptr, &query, sizeof(query)))
 525                 return -EFAULT;
 526
 527         return total_length;
 528 }
 529
 530 static int query_hwconfig_blob(struct drm_i915_private *i915,
 531                                struct drm_i915_query_item *query_item)
 532 {
 533         struct intel_gt *gt = to_gt(i915);
 534         struct intel_hwconfig *hwconfig = &gt->info.hwconfig;
 535
 536         if (!hwconfig->size || !hwconfig->ptr)
 537                 return -ENODEV;
 538
 539         if (query_item->length == 0)
 540                 return hwconfig->size;
 541
 542         if (query_item->length < hwconfig->size)
 543                 return -EINVAL;
 544
 545         if (copy_to_user(u64_to_user_ptr(query_item->data_ptr),
 546                          hwconfig->ptr, hwconfig->size))
 547                 return -EFAULT;
 548
 549         return hwconfig->size;
 550 }
 551
 552 static int (* const i915_query_funcs[])(struct drm_i915_private *dev_priv,
 553                                         struct drm_i915_query_item *query_item) = {
 554         query_topology_info,
 555         query_engine_info,
 556         query_perf_config,
 557         query_memregion_info,
 558         query_hwconfig_blob,
 559         query_geometry_subslices,
 560 };
 561
 562 int i915_query_ioctl(struct drm_device *dev, void *data, struct drm_file *file)
 563 {
 564         struct drm_i915_private *dev_priv = to_i915(dev);
 565         struct drm_i915_query *args = data;
 566         struct drm_i915_query_item __user *user_item_ptr =
 567                 u64_to_user_ptr(args->items_ptr);
 568         u32 i;
 569
 570         if (args->flags != 0)
 571                 return -EINVAL;
 572
 573         for (i = 0; i < args->num_items; i++, user_item_ptr++) {
 574                 struct drm_i915_query_item item;
 575                 unsigned long func_idx;
 576                 int ret;
 577
 578                 if (copy_from_user(&item, user_item_ptr, sizeof(item)))
 579                         return -EFAULT;
 580
 581                 if (item.query_id == 0)
 582                         return -EINVAL;
 583
 584                 if (overflows_type(item.query_id - 1, unsigned long))
 585                         return -EINVAL;
 586
 587                 func_idx = item.query_id - 1;
 588
 589                 ret = -EINVAL;
 590                 if (func_idx < ARRAY_SIZE(i915_query_funcs)) {
 591                         func_idx = array_index_nospec(func_idx,
 592                                                       ARRAY_SIZE(i915_query_funcs));
 593                         ret = i915_query_funcs[func_idx](dev_priv, &item);
 594                 }
 595
 596                 /* Only write the length back to userspace if they differ. */
 597                 if (ret != item.length && put_user(ret, &user_item_ptr->length))
 598                         return -EFAULT;
 599         }
 600
 601         return 0;
 602 }