drivers/misc/habanalabs/common/habanalabs_ioctl.c

   1 // SPDX-License-Identifier: GPL-2.0
   2
   3 /*
   4  * Copyright 2016-2019 HabanaLabs, Ltd.
   5  * All Rights Reserved.
   6  */
   7
   8 #include <uapi/misc/habanalabs.h>
   9 #include "habanalabs.h"
  10
  11 #include <linux/kernel.h>
  12 #include <linux/fs.h>
  13 #include <linux/uaccess.h>
  14 #include <linux/slab.h>
  15
  16 static u32 hl_debug_struct_size[HL_DEBUG_OP_TIMESTAMP + 1] = {
  17         [HL_DEBUG_OP_ETR] = sizeof(struct hl_debug_params_etr),
  18         [HL_DEBUG_OP_ETF] = sizeof(struct hl_debug_params_etf),
  19         [HL_DEBUG_OP_STM] = sizeof(struct hl_debug_params_stm),
  20         [HL_DEBUG_OP_FUNNEL] = 0,
  21         [HL_DEBUG_OP_BMON] = sizeof(struct hl_debug_params_bmon),
  22         [HL_DEBUG_OP_SPMU] = sizeof(struct hl_debug_params_spmu),
  23         [HL_DEBUG_OP_TIMESTAMP] = 0
  24
  25 };
  26
  27 static int device_status_info(struct hl_device *hdev, struct hl_info_args *args)
  28 {
  29         struct hl_info_device_status dev_stat = {0};
  30         u32 size = args->return_size;
  31         void __user *out = (void __user *) (uintptr_t) args->return_pointer;
  32
  33         if ((!size) || (!out))
  34                 return -EINVAL;
  35
  36         dev_stat.status = hl_device_status(hdev);
  37
  38         return copy_to_user(out, &dev_stat,
  39                         min((size_t)size, sizeof(dev_stat))) ? -EFAULT : 0;
  40 }
  41
  42 static int hw_ip_info(struct hl_device *hdev, struct hl_info_args *args)
  43 {
  44         struct hl_info_hw_ip_info hw_ip = {0};
  45         u32 size = args->return_size;
  46         void __user *out = (void __user *) (uintptr_t) args->return_pointer;
  47         struct asic_fixed_properties *prop = &hdev->asic_prop;
  48         u64 sram_kmd_size, dram_kmd_size;
  49
  50         if ((!size) || (!out))
  51                 return -EINVAL;
  52
  53         sram_kmd_size = (prop->sram_user_base_address -
  54                                 prop->sram_base_address);
  55         dram_kmd_size = (prop->dram_user_base_address -
  56                                 prop->dram_base_address);
  57
  58         hw_ip.device_id = hdev->asic_funcs->get_pci_id(hdev);
  59         hw_ip.sram_base_address = prop->sram_user_base_address;
  60         hw_ip.dram_base_address = prop->dram_user_base_address;
  61         hw_ip.tpc_enabled_mask = prop->tpc_enabled_mask;
  62         hw_ip.sram_size = prop->sram_size - sram_kmd_size;
  63         hw_ip.dram_size = prop->dram_size - dram_kmd_size;
  64         if (hw_ip.dram_size > PAGE_SIZE)
  65                 hw_ip.dram_enabled = 1;
  66         hw_ip.num_of_events = prop->num_of_events;
  67
  68         memcpy(hw_ip.cpucp_version, prop->cpucp_info.cpucp_version,
  69                 min(VERSION_MAX_LEN, HL_INFO_VERSION_MAX_LEN));
  70
  71         memcpy(hw_ip.card_name, prop->cpucp_info.card_name,
  72                 min(CARD_NAME_MAX_LEN, HL_INFO_CARD_NAME_MAX_LEN));
  73
  74         hw_ip.cpld_version = le32_to_cpu(prop->cpucp_info.cpld_version);
  75         hw_ip.module_id = le32_to_cpu(prop->cpucp_info.card_location);
  76
  77         hw_ip.psoc_pci_pll_nr = prop->psoc_pci_pll_nr;
  78         hw_ip.psoc_pci_pll_nf = prop->psoc_pci_pll_nf;
  79         hw_ip.psoc_pci_pll_od = prop->psoc_pci_pll_od;
  80         hw_ip.psoc_pci_pll_div_factor = prop->psoc_pci_pll_div_factor;
  81
  82         return copy_to_user(out, &hw_ip,
  83                 min((size_t)size, sizeof(hw_ip))) ? -EFAULT : 0;
  84 }
  85
  86 static int hw_events_info(struct hl_device *hdev, bool aggregate,
  87                         struct hl_info_args *args)
  88 {
  89         u32 size, max_size = args->return_size;
  90         void __user *out = (void __user *) (uintptr_t) args->return_pointer;
  91         void *arr;
  92
  93         if ((!max_size) || (!out))
  94                 return -EINVAL;
  95
  96         arr = hdev->asic_funcs->get_events_stat(hdev, aggregate, &size);
  97
  98         return copy_to_user(out, arr, min(max_size, size)) ? -EFAULT : 0;
  99 }
 100
 101 static int dram_usage_info(struct hl_fpriv *hpriv, struct hl_info_args *args)
 102 {
 103         struct hl_device *hdev = hpriv->hdev;
 104         struct hl_info_dram_usage dram_usage = {0};
 105         u32 max_size = args->return_size;
 106         void __user *out = (void __user *) (uintptr_t) args->return_pointer;
 107         struct asic_fixed_properties *prop = &hdev->asic_prop;
 108         u64 dram_kmd_size;
 109
 110         if ((!max_size) || (!out))
 111                 return -EINVAL;
 112
 113         dram_kmd_size = (prop->dram_user_base_address -
 114                                 prop->dram_base_address);
 115         dram_usage.dram_free_mem = (prop->dram_size - dram_kmd_size) -
 116                                         atomic64_read(&hdev->dram_used_mem);
 117         if (hpriv->ctx)
 118                 dram_usage.ctx_dram_mem =
 119                         atomic64_read(&hpriv->ctx->dram_phys_mem);
 120
 121         return copy_to_user(out, &dram_usage,
 122                 min((size_t) max_size, sizeof(dram_usage))) ? -EFAULT : 0;
 123 }
 124
 125 static int hw_idle(struct hl_device *hdev, struct hl_info_args *args)
 126 {
 127         struct hl_info_hw_idle hw_idle = {0};
 128         u32 max_size = args->return_size;
 129         void __user *out = (void __user *) (uintptr_t) args->return_pointer;
 130
 131         if ((!max_size) || (!out))
 132                 return -EINVAL;
 133
 134         hw_idle.is_idle = hdev->asic_funcs->is_device_idle(hdev,
 135                                         &hw_idle.busy_engines_mask_ext, NULL);
 136
 137         return copy_to_user(out, &hw_idle,
 138                 min((size_t) max_size, sizeof(hw_idle))) ? -EFAULT : 0;
 139 }
 140
 141 static int debug_coresight(struct hl_device *hdev, struct hl_debug_args *args)
 142 {
 143         struct hl_debug_params *params;
 144         void *input = NULL, *output = NULL;
 145         int rc;
 146
 147         params = kzalloc(sizeof(*params), GFP_KERNEL);
 148         if (!params)
 149                 return -ENOMEM;
 150
 151         params->reg_idx = args->reg_idx;
 152         params->enable = args->enable;
 153         params->op = args->op;
 154
 155         if (args->input_ptr && args->input_size) {
 156                 input = kzalloc(hl_debug_struct_size[args->op], GFP_KERNEL);
 157                 if (!input) {
 158                         rc = -ENOMEM;
 159                         goto out;
 160                 }
 161
 162                 if (copy_from_user(input, u64_to_user_ptr(args->input_ptr),
 163                                         args->input_size)) {
 164                         rc = -EFAULT;
 165                         dev_err(hdev->dev, "failed to copy input debug data\n");
 166                         goto out;
 167                 }
 168
 169                 params->input = input;
 170         }
 171
 172         if (args->output_ptr && args->output_size) {
 173                 output = kzalloc(args->output_size, GFP_KERNEL);
 174                 if (!output) {
 175                         rc = -ENOMEM;
 176                         goto out;
 177                 }
 178
 179                 params->output = output;
 180                 params->output_size = args->output_size;
 181         }
 182
 183         rc = hdev->asic_funcs->debug_coresight(hdev, params);
 184         if (rc) {
 185                 dev_err(hdev->dev,
 186                         "debug coresight operation failed %d\n", rc);
 187                 goto out;
 188         }
 189
 190         if (output && copy_to_user((void __user *) (uintptr_t) args->output_ptr,
 191                                         output, args->output_size)) {
 192                 dev_err(hdev->dev, "copy to user failed in debug ioctl\n");
 193                 rc = -EFAULT;
 194                 goto out;
 195         }
 196
 197
 198 out:
 199         kfree(params);
 200         kfree(output);
 201         kfree(input);
 202
 203         return rc;
 204 }
 205
 206 static int device_utilization(struct hl_device *hdev, struct hl_info_args *args)
 207 {
 208         struct hl_info_device_utilization device_util = {0};
 209         u32 max_size = args->return_size;
 210         void __user *out = (void __user *) (uintptr_t) args->return_pointer;
 211
 212         if ((!max_size) || (!out))
 213                 return -EINVAL;
 214
 215         if ((args->period_ms < 100) || (args->period_ms > 1000) ||
 216                 (args->period_ms % 100)) {
 217                 dev_err(hdev->dev,
 218                         "period %u must be between 100 - 1000 and must be divisible by 100\n",
 219                         args->period_ms);
 220                 return -EINVAL;
 221         }
 222
 223         device_util.utilization = hl_device_utilization(hdev, args->period_ms);
 224
 225         return copy_to_user(out, &device_util,
 226                 min((size_t) max_size, sizeof(device_util))) ? -EFAULT : 0;
 227 }
 228
 229 static int get_clk_rate(struct hl_device *hdev, struct hl_info_args *args)
 230 {
 231         struct hl_info_clk_rate clk_rate = {0};
 232         u32 max_size = args->return_size;
 233         void __user *out = (void __user *) (uintptr_t) args->return_pointer;
 234         int rc;
 235
 236         if ((!max_size) || (!out))
 237                 return -EINVAL;
 238
 239         rc = hdev->asic_funcs->get_clk_rate(hdev, &clk_rate.cur_clk_rate_mhz,
 240                                                 &clk_rate.max_clk_rate_mhz);
 241         if (rc)
 242                 return rc;
 243
 244         return copy_to_user(out, &clk_rate,
 245                 min((size_t) max_size, sizeof(clk_rate))) ? -EFAULT : 0;
 246 }
 247
 248 static int get_reset_count(struct hl_device *hdev, struct hl_info_args *args)
 249 {
 250         struct hl_info_reset_count reset_count = {0};
 251         u32 max_size = args->return_size;
 252         void __user *out = (void __user *) (uintptr_t) args->return_pointer;
 253
 254         if ((!max_size) || (!out))
 255                 return -EINVAL;
 256
 257         reset_count.hard_reset_cnt = hdev->hard_reset_cnt;
 258         reset_count.soft_reset_cnt = hdev->soft_reset_cnt;
 259
 260         return copy_to_user(out, &reset_count,
 261                 min((size_t) max_size, sizeof(reset_count))) ? -EFAULT : 0;
 262 }
 263
 264 static int time_sync_info(struct hl_device *hdev, struct hl_info_args *args)
 265 {
 266         struct hl_info_time_sync time_sync = {0};
 267         u32 max_size = args->return_size;
 268         void __user *out = (void __user *) (uintptr_t) args->return_pointer;
 269
 270         if ((!max_size) || (!out))
 271                 return -EINVAL;
 272
 273         time_sync.device_time = hdev->asic_funcs->get_device_time(hdev);
 274         time_sync.host_time = ktime_get_raw_ns();
 275
 276         return copy_to_user(out, &time_sync,
 277                 min((size_t) max_size, sizeof(time_sync))) ? -EFAULT : 0;
 278 }
 279
 280 static int pci_counters_info(struct hl_fpriv *hpriv, struct hl_info_args *args)
 281 {
 282         struct hl_device *hdev = hpriv->hdev;
 283         struct hl_info_pci_counters pci_counters = {0};
 284         u32 max_size = args->return_size;
 285         void __user *out = (void __user *) (uintptr_t) args->return_pointer;
 286         int rc;
 287
 288         if ((!max_size) || (!out))
 289                 return -EINVAL;
 290
 291         rc = hl_fw_cpucp_pci_counters_get(hdev, &pci_counters);
 292         if (rc)
 293                 return rc;
 294
 295         return copy_to_user(out, &pci_counters,
 296                 min((size_t) max_size, sizeof(pci_counters))) ? -EFAULT : 0;
 297 }
 298
 299 static int clk_throttle_info(struct hl_fpriv *hpriv, struct hl_info_args *args)
 300 {
 301         struct hl_device *hdev = hpriv->hdev;
 302         struct hl_info_clk_throttle clk_throttle = {0};
 303         u32 max_size = args->return_size;
 304         void __user *out = (void __user *) (uintptr_t) args->return_pointer;
 305
 306         if ((!max_size) || (!out))
 307                 return -EINVAL;
 308
 309         clk_throttle.clk_throttling_reason = hdev->clk_throttling_reason;
 310
 311         return copy_to_user(out, &clk_throttle,
 312                 min((size_t) max_size, sizeof(clk_throttle))) ? -EFAULT : 0;
 313 }
 314
 315 static int cs_counters_info(struct hl_fpriv *hpriv, struct hl_info_args *args)
 316 {
 317         void __user *out = (void __user *) (uintptr_t) args->return_pointer;
 318         struct hl_info_cs_counters cs_counters = {0};
 319         struct hl_device *hdev = hpriv->hdev;
 320         struct hl_cs_counters_atomic *cntr;
 321         u32 max_size = args->return_size;
 322
 323         cntr = &hdev->aggregated_cs_counters;
 324
 325         if ((!max_size) || (!out))
 326                 return -EINVAL;
 327
 328         cs_counters.total_out_of_mem_drop_cnt =
 329                         atomic64_read(&cntr->out_of_mem_drop_cnt);
 330         cs_counters.total_parsing_drop_cnt =
 331                         atomic64_read(&cntr->parsing_drop_cnt);
 332         cs_counters.total_queue_full_drop_cnt =
 333                         atomic64_read(&cntr->queue_full_drop_cnt);
 334         cs_counters.total_device_in_reset_drop_cnt =
 335                         atomic64_read(&cntr->device_in_reset_drop_cnt);
 336         cs_counters.total_max_cs_in_flight_drop_cnt =
 337                         atomic64_read(&cntr->max_cs_in_flight_drop_cnt);
 338         cs_counters.total_validation_drop_cnt =
 339                         atomic64_read(&cntr->validation_drop_cnt);
 340
 341         if (hpriv->ctx) {
 342                 cs_counters.ctx_out_of_mem_drop_cnt =
 343                                 atomic64_read(
 344                                 &hpriv->ctx->cs_counters.out_of_mem_drop_cnt);
 345                 cs_counters.ctx_parsing_drop_cnt =
 346                                 atomic64_read(
 347                                 &hpriv->ctx->cs_counters.parsing_drop_cnt);
 348                 cs_counters.ctx_queue_full_drop_cnt =
 349                                 atomic64_read(
 350                                 &hpriv->ctx->cs_counters.queue_full_drop_cnt);
 351                 cs_counters.ctx_device_in_reset_drop_cnt =
 352                                 atomic64_read(
 353                         &hpriv->ctx->cs_counters.device_in_reset_drop_cnt);
 354                 cs_counters.ctx_max_cs_in_flight_drop_cnt =
 355                                 atomic64_read(
 356                         &hpriv->ctx->cs_counters.max_cs_in_flight_drop_cnt);
 357                 cs_counters.ctx_validation_drop_cnt =
 358                                 atomic64_read(
 359                                 &hpriv->ctx->cs_counters.validation_drop_cnt);
 360         }
 361
 362         return copy_to_user(out, &cs_counters,
 363                 min((size_t) max_size, sizeof(cs_counters))) ? -EFAULT : 0;
 364 }
 365
 366 static int sync_manager_info(struct hl_fpriv *hpriv, struct hl_info_args *args)
 367 {
 368         struct hl_device *hdev = hpriv->hdev;
 369         struct asic_fixed_properties *prop = &hdev->asic_prop;
 370         struct hl_info_sync_manager sm_info = {0};
 371         u32 max_size = args->return_size;
 372         void __user *out = (void __user *) (uintptr_t) args->return_pointer;
 373
 374         if ((!max_size) || (!out))
 375                 return -EINVAL;
 376
 377         if (args->dcore_id >= HL_MAX_DCORES)
 378                 return -EINVAL;
 379
 380         sm_info.first_available_sync_object =
 381                         prop->first_available_user_sob[args->dcore_id];
 382         sm_info.first_available_monitor =
 383                         prop->first_available_user_mon[args->dcore_id];
 384
 385
 386         return copy_to_user(out, &sm_info, min_t(size_t, (size_t) max_size,
 387                         sizeof(sm_info))) ? -EFAULT : 0;
 388 }
 389
 390 static int total_energy_consumption_info(struct hl_fpriv *hpriv,
 391                         struct hl_info_args *args)
 392 {
 393         struct hl_device *hdev = hpriv->hdev;
 394         struct hl_info_energy total_energy = {0};
 395         u32 max_size = args->return_size;
 396         void __user *out = (void __user *) (uintptr_t) args->return_pointer;
 397         int rc;
 398
 399         if ((!max_size) || (!out))
 400                 return -EINVAL;
 401
 402         rc = hl_fw_cpucp_total_energy_get(hdev,
 403                         &total_energy.total_energy_consumption);
 404         if (rc)
 405                 return rc;
 406
 407         return copy_to_user(out, &total_energy,
 408                 min((size_t) max_size, sizeof(total_energy))) ? -EFAULT : 0;
 409 }
 410
 411 static int pll_frequency_info(struct hl_fpriv *hpriv, struct hl_info_args *args)
 412 {
 413         struct hl_device *hdev = hpriv->hdev;
 414         struct hl_pll_frequency_info freq_info = { {0} };
 415         u32 max_size = args->return_size;
 416         void __user *out = (void __user *) (uintptr_t) args->return_pointer;
 417         int rc;
 418
 419         if ((!max_size) || (!out))
 420                 return -EINVAL;
 421
 422         rc = hl_fw_cpucp_pll_info_get(hdev, args->pll_index, freq_info.output);
 423         if (rc)
 424                 return rc;
 425
 426         return copy_to_user(out, &freq_info,
 427                 min((size_t) max_size, sizeof(freq_info))) ? -EFAULT : 0;
 428 }
 429
 430 static int _hl_info_ioctl(struct hl_fpriv *hpriv, void *data,
 431                                 struct device *dev)
 432 {
 433         enum hl_device_status status;
 434         struct hl_info_args *args = data;
 435         struct hl_device *hdev = hpriv->hdev;
 436
 437         int rc;
 438
 439         /*
 440          * Information is returned for the following opcodes even if the device
 441          * is disabled or in reset.
 442          */
 443         switch (args->op) {
 444         case HL_INFO_HW_IP_INFO:
 445                 return hw_ip_info(hdev, args);
 446
 447         case HL_INFO_DEVICE_STATUS:
 448                 return device_status_info(hdev, args);
 449
 450         case HL_INFO_RESET_COUNT:
 451                 return get_reset_count(hdev, args);
 452
 453         default:
 454                 break;
 455         }
 456
 457         if (!hl_device_operational(hdev, &status)) {
 458                 dev_warn_ratelimited(dev,
 459                         "Device is %s. Can't execute INFO IOCTL\n",
 460                         hdev->status[status]);
 461                 return -EBUSY;
 462         }
 463
 464         switch (args->op) {
 465         case HL_INFO_HW_EVENTS:
 466                 rc = hw_events_info(hdev, false, args);
 467                 break;
 468
 469         case HL_INFO_DRAM_USAGE:
 470                 rc = dram_usage_info(hpriv, args);
 471                 break;
 472
 473         case HL_INFO_HW_IDLE:
 474                 rc = hw_idle(hdev, args);
 475                 break;
 476
 477         case HL_INFO_DEVICE_UTILIZATION:
 478                 rc = device_utilization(hdev, args);
 479                 break;
 480
 481         case HL_INFO_HW_EVENTS_AGGREGATE:
 482                 rc = hw_events_info(hdev, true, args);
 483                 break;
 484
 485         case HL_INFO_CLK_RATE:
 486                 rc = get_clk_rate(hdev, args);
 487                 break;
 488
 489         case HL_INFO_TIME_SYNC:
 490                 return time_sync_info(hdev, args);
 491
 492         case HL_INFO_CS_COUNTERS:
 493                 return cs_counters_info(hpriv, args);
 494
 495         case HL_INFO_PCI_COUNTERS:
 496                 return pci_counters_info(hpriv, args);
 497
 498         case HL_INFO_CLK_THROTTLE_REASON:
 499                 return clk_throttle_info(hpriv, args);
 500
 501         case HL_INFO_SYNC_MANAGER:
 502                 return sync_manager_info(hpriv, args);
 503
 504         case HL_INFO_TOTAL_ENERGY:
 505                 return total_energy_consumption_info(hpriv, args);
 506
 507         case HL_INFO_PLL_FREQUENCY:
 508                 return pll_frequency_info(hpriv, args);
 509
 510         default:
 511                 dev_err(dev, "Invalid request %d\n", args->op);
 512                 rc = -ENOTTY;
 513                 break;
 514         }
 515
 516         return rc;
 517 }
 518
 519 static int hl_info_ioctl(struct hl_fpriv *hpriv, void *data)
 520 {
 521         return _hl_info_ioctl(hpriv, data, hpriv->hdev->dev);
 522 }
 523
 524 static int hl_info_ioctl_control(struct hl_fpriv *hpriv, void *data)
 525 {
 526         return _hl_info_ioctl(hpriv, data, hpriv->hdev->dev_ctrl);
 527 }
 528
 529 static int hl_debug_ioctl(struct hl_fpriv *hpriv, void *data)
 530 {
 531         struct hl_debug_args *args = data;
 532         struct hl_device *hdev = hpriv->hdev;
 533         enum hl_device_status status;
 534
 535         int rc = 0;
 536
 537         if (!hl_device_operational(hdev, &status)) {
 538                 dev_warn_ratelimited(hdev->dev,
 539                         "Device is %s. Can't execute DEBUG IOCTL\n",
 540                         hdev->status[status]);
 541                 return -EBUSY;
 542         }
 543
 544         switch (args->op) {
 545         case HL_DEBUG_OP_ETR:
 546         case HL_DEBUG_OP_ETF:
 547         case HL_DEBUG_OP_STM:
 548         case HL_DEBUG_OP_FUNNEL:
 549         case HL_DEBUG_OP_BMON:
 550         case HL_DEBUG_OP_SPMU:
 551         case HL_DEBUG_OP_TIMESTAMP:
 552                 if (!hdev->in_debug) {
 553                         dev_err_ratelimited(hdev->dev,
 554                                 "Rejecting debug configuration request because device not in debug mode\n");
 555                         return -EFAULT;
 556                 }
 557                 args->input_size =
 558                         min(args->input_size, hl_debug_struct_size[args->op]);
 559                 rc = debug_coresight(hdev, args);
 560                 break;
 561         case HL_DEBUG_OP_SET_MODE:
 562                 rc = hl_device_set_debug_mode(hdev, (bool) args->enable);
 563                 break;
 564         default:
 565                 dev_err(hdev->dev, "Invalid request %d\n", args->op);
 566                 rc = -ENOTTY;
 567                 break;
 568         }
 569
 570         return rc;
 571 }
 572
 573 #define HL_IOCTL_DEF(ioctl, _func) \
 574         [_IOC_NR(ioctl)] = {.cmd = ioctl, .func = _func}
 575
 576 static const struct hl_ioctl_desc hl_ioctls[] = {
 577         HL_IOCTL_DEF(HL_IOCTL_INFO, hl_info_ioctl),
 578         HL_IOCTL_DEF(HL_IOCTL_CB, hl_cb_ioctl),
 579         HL_IOCTL_DEF(HL_IOCTL_CS, hl_cs_ioctl),
 580         HL_IOCTL_DEF(HL_IOCTL_WAIT_CS, hl_cs_wait_ioctl),
 581         HL_IOCTL_DEF(HL_IOCTL_MEMORY, hl_mem_ioctl),
 582         HL_IOCTL_DEF(HL_IOCTL_DEBUG, hl_debug_ioctl)
 583 };
 584
 585 static const struct hl_ioctl_desc hl_ioctls_control[] = {
 586         HL_IOCTL_DEF(HL_IOCTL_INFO, hl_info_ioctl_control)
 587 };
 588
 589 static long _hl_ioctl(struct file *filep, unsigned int cmd, unsigned long arg,
 590                 const struct hl_ioctl_desc *ioctl, struct device *dev)
 591 {
 592         struct hl_fpriv *hpriv = filep->private_data;
 593         struct hl_device *hdev = hpriv->hdev;
 594         unsigned int nr = _IOC_NR(cmd);
 595         char stack_kdata[128] = {0};
 596         char *kdata = NULL;
 597         unsigned int usize, asize;
 598         hl_ioctl_t *func;
 599         u32 hl_size;
 600         int retcode;
 601
 602         if (hdev->hard_reset_pending) {
 603                 dev_crit_ratelimited(dev,
 604                         "Device HARD reset pending! Please close FD\n");
 605                 return -ENODEV;
 606         }
 607
 608         /* Do not trust userspace, use our own definition */
 609         func = ioctl->func;
 610
 611         if (unlikely(!func)) {
 612                 dev_dbg(dev, "no function\n");
 613                 retcode = -ENOTTY;
 614                 goto out_err;
 615         }
 616
 617         hl_size = _IOC_SIZE(ioctl->cmd);
 618         usize = asize = _IOC_SIZE(cmd);
 619         if (hl_size > asize)
 620                 asize = hl_size;
 621
 622         cmd = ioctl->cmd;
 623
 624         if (cmd & (IOC_IN | IOC_OUT)) {
 625                 if (asize <= sizeof(stack_kdata)) {
 626                         kdata = stack_kdata;
 627                 } else {
 628                         kdata = kzalloc(asize, GFP_KERNEL);
 629                         if (!kdata) {
 630                                 retcode = -ENOMEM;
 631                                 goto out_err;
 632                         }
 633                 }
 634         }
 635
 636         if (cmd & IOC_IN) {
 637                 if (copy_from_user(kdata, (void __user *)arg, usize)) {
 638                         retcode = -EFAULT;
 639                         goto out_err;
 640                 }
 641         } else if (cmd & IOC_OUT) {
 642                 memset(kdata, 0, usize);
 643         }
 644
 645         retcode = func(hpriv, kdata);
 646
 647         if ((cmd & IOC_OUT) && copy_to_user((void __user *)arg, kdata, usize))
 648                 retcode = -EFAULT;
 649
 650 out_err:
 651         if (retcode)
 652                 dev_dbg(dev, "error in ioctl: pid=%d, cmd=0x%02x, nr=0x%02x\n",
 653                           task_pid_nr(current), cmd, nr);
 654
 655         if (kdata != stack_kdata)
 656                 kfree(kdata);
 657
 658         return retcode;
 659 }
 660
 661 long hl_ioctl(struct file *filep, unsigned int cmd, unsigned long arg)
 662 {
 663         struct hl_fpriv *hpriv = filep->private_data;
 664         struct hl_device *hdev = hpriv->hdev;
 665         const struct hl_ioctl_desc *ioctl = NULL;
 666         unsigned int nr = _IOC_NR(cmd);
 667
 668         if ((nr >= HL_COMMAND_START) && (nr < HL_COMMAND_END)) {
 669                 ioctl = &hl_ioctls[nr];
 670         } else {
 671                 dev_err(hdev->dev, "invalid ioctl: pid=%d, nr=0x%02x\n",
 672                         task_pid_nr(current), nr);
 673                 return -ENOTTY;
 674         }
 675
 676         return _hl_ioctl(filep, cmd, arg, ioctl, hdev->dev);
 677 }
 678
 679 long hl_ioctl_control(struct file *filep, unsigned int cmd, unsigned long arg)
 680 {
 681         struct hl_fpriv *hpriv = filep->private_data;
 682         struct hl_device *hdev = hpriv->hdev;
 683         const struct hl_ioctl_desc *ioctl = NULL;
 684         unsigned int nr = _IOC_NR(cmd);
 685
 686         if (nr == _IOC_NR(HL_IOCTL_INFO)) {
 687                 ioctl = &hl_ioctls_control[nr];
 688         } else {
 689                 dev_err(hdev->dev_ctrl, "invalid ioctl: pid=%d, nr=0x%02x\n",
 690                         task_pid_nr(current), nr);
 691                 return -ENOTTY;
 692         }
 693
 694         return _hl_ioctl(filep, cmd, arg, ioctl, hdev->dev_ctrl);
 695 }