drivers/net/wireless/intel/iwlwifi/mvm/nvm.c

   1 /******************************************************************************
   2  *
   3  * This file is provided under a dual BSD/GPLv2 license.  When using or
   4  * redistributing this file, you may do so under either license.
   5  *
   6  * GPL LICENSE SUMMARY
   7  *
   8  * Copyright(c) 2012 - 2014 Intel Corporation. All rights reserved.
   9  * Copyright(c) 2013 - 2015 Intel Mobile Communications GmbH
  10  * Copyright(c) 2016 - 2017 Intel Deutschland GmbH
  11  * Copyright(c) 2018        Intel Corporation
  12  *
  13  * This program is free software; you can redistribute it and/or modify
  14  * it under the terms of version 2 of the GNU General Public License as
  15  * published by the Free Software Foundation.
  16  *
  17  * This program is distributed in the hope that it will be useful, but
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  19  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
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  31  *  Intel Linux Wireless <linuxwifi@intel.com>
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  35  *
  36  * Copyright(c) 2012 - 2014 Intel Corporation. All rights reserved.
  37  * Copyright(c) 2013 - 2015 Intel Mobile Communications GmbH
  38  * Copyright(c) 2016 - 2017 Intel Deutschland GmbH
  39  * Copyright(c) 2018        Intel Corporation
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  43  * modification, are permitted provided that the following conditions
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  53  *    contributors may be used to endorse or promote products derived
  54  *    from this software without specific prior written permission.
  55  *
  56  * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
  57  * "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
  58  * LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
  59  * A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
  60  * OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
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  66  * OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
  67  *
  68  *****************************************************************************/
  69 #include <linux/firmware.h>
  70 #include <linux/rtnetlink.h>
  71 #include "iwl-trans.h"
  72 #include "iwl-csr.h"
  73 #include "mvm.h"
  74 #include "iwl-eeprom-parse.h"
  75 #include "iwl-eeprom-read.h"
  76 #include "iwl-nvm-parse.h"
  77 #include "iwl-prph.h"
  78 #include "fw/acpi.h"
  79
  80 /* Default NVM size to read */
  81 #define IWL_NVM_DEFAULT_CHUNK_SIZE (2 * 1024)
  82
  83 #define NVM_WRITE_OPCODE 1
  84 #define NVM_READ_OPCODE 0
  85
  86 /* load nvm chunk response */
  87 enum {
  88         READ_NVM_CHUNK_SUCCEED = 0,
  89         READ_NVM_CHUNK_NOT_VALID_ADDRESS = 1
  90 };
  91
  92 /*
  93  * prepare the NVM host command w/ the pointers to the nvm buffer
  94  * and send it to fw
  95  */
  96 static int iwl_nvm_write_chunk(struct iwl_mvm *mvm, u16 section,
  97                                u16 offset, u16 length, const u8 *data)
  98 {
  99         struct iwl_nvm_access_cmd nvm_access_cmd = {
 100                 .offset = cpu_to_le16(offset),
 101                 .length = cpu_to_le16(length),
 102                 .type = cpu_to_le16(section),
 103                 .op_code = NVM_WRITE_OPCODE,
 104         };
 105         struct iwl_host_cmd cmd = {
 106                 .id = NVM_ACCESS_CMD,
 107                 .len = { sizeof(struct iwl_nvm_access_cmd), length },
 108                 .flags = CMD_WANT_SKB | CMD_SEND_IN_RFKILL,
 109                 .data = { &nvm_access_cmd, data },
 110                 /* data may come from vmalloc, so use _DUP */
 111                 .dataflags = { 0, IWL_HCMD_DFL_DUP },
 112         };
 113         struct iwl_rx_packet *pkt;
 114         struct iwl_nvm_access_resp *nvm_resp;
 115         int ret;
 116
 117         ret = iwl_mvm_send_cmd(mvm, &cmd);
 118         if (ret)
 119                 return ret;
 120
 121         pkt = cmd.resp_pkt;
 122         /* Extract & check NVM write response */
 123         nvm_resp = (void *)pkt->data;
 124         if (le16_to_cpu(nvm_resp->status) != READ_NVM_CHUNK_SUCCEED) {
 125                 IWL_ERR(mvm,
 126                         "NVM access write command failed for section %u (status = 0x%x)\n",
 127                         section, le16_to_cpu(nvm_resp->status));
 128                 ret = -EIO;
 129         }
 130
 131         iwl_free_resp(&cmd);
 132         return ret;
 133 }
 134
 135 static int iwl_nvm_read_chunk(struct iwl_mvm *mvm, u16 section,
 136                               u16 offset, u16 length, u8 *data)
 137 {
 138         struct iwl_nvm_access_cmd nvm_access_cmd = {
 139                 .offset = cpu_to_le16(offset),
 140                 .length = cpu_to_le16(length),
 141                 .type = cpu_to_le16(section),
 142                 .op_code = NVM_READ_OPCODE,
 143         };
 144         struct iwl_nvm_access_resp *nvm_resp;
 145         struct iwl_rx_packet *pkt;
 146         struct iwl_host_cmd cmd = {
 147                 .id = NVM_ACCESS_CMD,
 148                 .flags = CMD_WANT_SKB | CMD_SEND_IN_RFKILL,
 149                 .data = { &nvm_access_cmd, },
 150         };
 151         int ret, bytes_read, offset_read;
 152         u8 *resp_data;
 153
 154         cmd.len[0] = sizeof(struct iwl_nvm_access_cmd);
 155
 156         ret = iwl_mvm_send_cmd(mvm, &cmd);
 157         if (ret)
 158                 return ret;
 159
 160         pkt = cmd.resp_pkt;
 161
 162         /* Extract NVM response */
 163         nvm_resp = (void *)pkt->data;
 164         ret = le16_to_cpu(nvm_resp->status);
 165         bytes_read = le16_to_cpu(nvm_resp->length);
 166         offset_read = le16_to_cpu(nvm_resp->offset);
 167         resp_data = nvm_resp->data;
 168         if (ret) {
 169                 if ((offset != 0) &&
 170                     (ret == READ_NVM_CHUNK_NOT_VALID_ADDRESS)) {
 171                         /*
 172                          * meaning of NOT_VALID_ADDRESS:
 173                          * driver try to read chunk from address that is
 174                          * multiple of 2K and got an error since addr is empty.
 175                          * meaning of (offset != 0): driver already
 176                          * read valid data from another chunk so this case
 177                          * is not an error.
 178                          */
 179                         IWL_DEBUG_EEPROM(mvm->trans->dev,
 180                                          "NVM access command failed on offset 0x%x since that section size is multiple 2K\n",
 181                                          offset);
 182                         ret = 0;
 183                 } else {
 184                         IWL_DEBUG_EEPROM(mvm->trans->dev,
 185                                          "NVM access command failed with status %d (device: %s)\n",
 186                                          ret, mvm->cfg->name);
 187                         ret = -EIO;
 188                 }
 189                 goto exit;
 190         }
 191
 192         if (offset_read != offset) {
 193                 IWL_ERR(mvm, "NVM ACCESS response with invalid offset %d\n",
 194                         offset_read);
 195                 ret = -EINVAL;
 196                 goto exit;
 197         }
 198
 199         /* Write data to NVM */
 200         memcpy(data + offset, resp_data, bytes_read);
 201         ret = bytes_read;
 202
 203 exit:
 204         iwl_free_resp(&cmd);
 205         return ret;
 206 }
 207
 208 static int iwl_nvm_write_section(struct iwl_mvm *mvm, u16 section,
 209                                  const u8 *data, u16 length)
 210 {
 211         int offset = 0;
 212
 213         /* copy data in chunks of 2k (and remainder if any) */
 214
 215         while (offset < length) {
 216                 int chunk_size, ret;
 217
 218                 chunk_size = min(IWL_NVM_DEFAULT_CHUNK_SIZE,
 219                                  length - offset);
 220
 221                 ret = iwl_nvm_write_chunk(mvm, section, offset,
 222                                           chunk_size, data + offset);
 223                 if (ret < 0)
 224                         return ret;
 225
 226                 offset += chunk_size;
 227         }
 228
 229         return 0;
 230 }
 231
 232 /*
 233  * Reads an NVM section completely.
 234  * NICs prior to 7000 family doesn't have a real NVM, but just read
 235  * section 0 which is the EEPROM. Because the EEPROM reading is unlimited
 236  * by uCode, we need to manually check in this case that we don't
 237  * overflow and try to read more than the EEPROM size.
 238  * For 7000 family NICs, we supply the maximal size we can read, and
 239  * the uCode fills the response with as much data as we can,
 240  * without overflowing, so no check is needed.
 241  */
 242 static int iwl_nvm_read_section(struct iwl_mvm *mvm, u16 section,
 243                                 u8 *data, u32 size_read)
 244 {
 245         u16 length, offset = 0;
 246         int ret;
 247
 248         /* Set nvm section read length */
 249         length = IWL_NVM_DEFAULT_CHUNK_SIZE;
 250
 251         ret = length;
 252
 253         /* Read the NVM until exhausted (reading less than requested) */
 254         while (ret == length) {
 255                 /* Check no memory assumptions fail and cause an overflow */
 256                 if ((size_read + offset + length) >
 257                     mvm->cfg->base_params->eeprom_size) {
 258                         IWL_ERR(mvm, "EEPROM size is too small for NVM\n");
 259                         return -ENOBUFS;
 260                 }
 261
 262                 ret = iwl_nvm_read_chunk(mvm, section, offset, length, data);
 263                 if (ret < 0) {
 264                         IWL_DEBUG_EEPROM(mvm->trans->dev,
 265                                          "Cannot read NVM from section %d offset %d, length %d\n",
 266                                          section, offset, length);
 267                         return ret;
 268                 }
 269                 offset += ret;
 270         }
 271
 272         iwl_nvm_fixups(mvm->trans->hw_id, section, data, offset);
 273
 274         IWL_DEBUG_EEPROM(mvm->trans->dev,
 275                          "NVM section %d read completed\n", section);
 276         return offset;
 277 }
 278
 279 static struct iwl_nvm_data *
 280 iwl_parse_nvm_sections(struct iwl_mvm *mvm)
 281 {
 282         struct iwl_nvm_section *sections = mvm->nvm_sections;
 283         const __be16 *hw;
 284         const __le16 *sw, *calib, *regulatory, *mac_override, *phy_sku;
 285         bool lar_enabled;
 286         int regulatory_type;
 287
 288         /* Checking for required sections */
 289         if (mvm->trans->cfg->nvm_type == IWL_NVM) {
 290                 if (!mvm->nvm_sections[NVM_SECTION_TYPE_SW].data ||
 291                     !mvm->nvm_sections[mvm->cfg->nvm_hw_section_num].data) {
 292                         IWL_ERR(mvm, "Can't parse empty OTP/NVM sections\n");
 293                         return NULL;
 294                 }
 295         } else {
 296                 if (mvm->trans->cfg->nvm_type == IWL_NVM_SDP)
 297                         regulatory_type = NVM_SECTION_TYPE_REGULATORY_SDP;
 298                 else
 299                         regulatory_type = NVM_SECTION_TYPE_REGULATORY;
 300
 301                 /* SW and REGULATORY sections are mandatory */
 302                 if (!mvm->nvm_sections[NVM_SECTION_TYPE_SW].data ||
 303                     !mvm->nvm_sections[regulatory_type].data) {
 304                         IWL_ERR(mvm,
 305                                 "Can't parse empty family 8000 OTP/NVM sections\n");
 306                         return NULL;
 307                 }
 308                 /* MAC_OVERRIDE or at least HW section must exist */
 309                 if (!mvm->nvm_sections[mvm->cfg->nvm_hw_section_num].data &&
 310                     !mvm->nvm_sections[NVM_SECTION_TYPE_MAC_OVERRIDE].data) {
 311                         IWL_ERR(mvm,
 312                                 "Can't parse mac_address, empty sections\n");
 313                         return NULL;
 314                 }
 315
 316                 /* PHY_SKU section is mandatory in B0 */
 317                 if (mvm->trans->cfg->nvm_type == IWL_NVM_EXT &&
 318                     !mvm->nvm_sections[NVM_SECTION_TYPE_PHY_SKU].data) {
 319                         IWL_ERR(mvm,
 320                                 "Can't parse phy_sku in B0, empty sections\n");
 321                         return NULL;
 322                 }
 323         }
 324
 325         hw = (const __be16 *)sections[mvm->cfg->nvm_hw_section_num].data;
 326         sw = (const __le16 *)sections[NVM_SECTION_TYPE_SW].data;
 327         calib = (const __le16 *)sections[NVM_SECTION_TYPE_CALIBRATION].data;
 328         mac_override =
 329                 (const __le16 *)sections[NVM_SECTION_TYPE_MAC_OVERRIDE].data;
 330         phy_sku = (const __le16 *)sections[NVM_SECTION_TYPE_PHY_SKU].data;
 331
 332         regulatory = mvm->trans->cfg->nvm_type == IWL_NVM_SDP ?
 333                 (const __le16 *)sections[NVM_SECTION_TYPE_REGULATORY_SDP].data :
 334                 (const __le16 *)sections[NVM_SECTION_TYPE_REGULATORY].data;
 335
 336         lar_enabled = !iwlwifi_mod_params.lar_disable &&
 337                       fw_has_capa(&mvm->fw->ucode_capa,
 338                                   IWL_UCODE_TLV_CAPA_LAR_SUPPORT);
 339
 340         return iwl_parse_nvm_data(mvm->trans, mvm->cfg, hw, sw, calib,
 341                                   regulatory, mac_override, phy_sku,
 342                                   mvm->fw->valid_tx_ant, mvm->fw->valid_rx_ant,
 343                                   lar_enabled);
 344 }
 345
 346 /* Loads the NVM data stored in mvm->nvm_sections into the NIC */
 347 int iwl_mvm_load_nvm_to_nic(struct iwl_mvm *mvm)
 348 {
 349         int i, ret = 0;
 350         struct iwl_nvm_section *sections = mvm->nvm_sections;
 351
 352         IWL_DEBUG_EEPROM(mvm->trans->dev, "'Write to NVM\n");
 353
 354         for (i = 0; i < ARRAY_SIZE(mvm->nvm_sections); i++) {
 355                 if (!mvm->nvm_sections[i].data || !mvm->nvm_sections[i].length)
 356                         continue;
 357                 ret = iwl_nvm_write_section(mvm, i, sections[i].data,
 358                                             sections[i].length);
 359                 if (ret < 0) {
 360                         IWL_ERR(mvm, "iwl_mvm_send_cmd failed: %d\n", ret);
 361                         break;
 362                 }
 363         }
 364         return ret;
 365 }
 366
 367 int iwl_nvm_init(struct iwl_mvm *mvm)
 368 {
 369         int ret, section;
 370         u32 size_read = 0;
 371         u8 *nvm_buffer, *temp;
 372         const char *nvm_file_C = mvm->cfg->default_nvm_file_C_step;
 373
 374         if (WARN_ON_ONCE(mvm->cfg->nvm_hw_section_num >= NVM_MAX_NUM_SECTIONS))
 375                 return -EINVAL;
 376
 377         /* load NVM values from nic */
 378         /* Read From FW NVM */
 379         IWL_DEBUG_EEPROM(mvm->trans->dev, "Read from NVM\n");
 380
 381         nvm_buffer = kmalloc(mvm->cfg->base_params->eeprom_size,
 382                              GFP_KERNEL);
 383         if (!nvm_buffer)
 384                 return -ENOMEM;
 385         for (section = 0; section < NVM_MAX_NUM_SECTIONS; section++) {
 386                 /* we override the constness for initial read */
 387                 ret = iwl_nvm_read_section(mvm, section, nvm_buffer,
 388                                            size_read);
 389                 if (ret < 0)
 390                         continue;
 391                 size_read += ret;
 392                 temp = kmemdup(nvm_buffer, ret, GFP_KERNEL);
 393                 if (!temp) {
 394                         ret = -ENOMEM;
 395                         break;
 396                 }
 397
 398                 iwl_nvm_fixups(mvm->trans->hw_id, section, temp, ret);
 399
 400                 mvm->nvm_sections[section].data = temp;
 401                 mvm->nvm_sections[section].length = ret;
 402
 403 #ifdef CONFIG_IWLWIFI_DEBUGFS
 404                 switch (section) {
 405                 case NVM_SECTION_TYPE_SW:
 406                         mvm->nvm_sw_blob.data = temp;
 407                         mvm->nvm_sw_blob.size  = ret;
 408                         break;
 409                 case NVM_SECTION_TYPE_CALIBRATION:
 410                         mvm->nvm_calib_blob.data = temp;
 411                         mvm->nvm_calib_blob.size  = ret;
 412                         break;
 413                 case NVM_SECTION_TYPE_PRODUCTION:
 414                         mvm->nvm_prod_blob.data = temp;
 415                         mvm->nvm_prod_blob.size  = ret;
 416                         break;
 417                 case NVM_SECTION_TYPE_PHY_SKU:
 418                         mvm->nvm_phy_sku_blob.data = temp;
 419                         mvm->nvm_phy_sku_blob.size  = ret;
 420                         break;
 421                 default:
 422                         if (section == mvm->cfg->nvm_hw_section_num) {
 423                                 mvm->nvm_hw_blob.data = temp;
 424                                 mvm->nvm_hw_blob.size = ret;
 425                                 break;
 426                         }
 427                 }
 428 #endif
 429         }
 430         if (!size_read)
 431                 IWL_ERR(mvm, "OTP is blank\n");
 432         kfree(nvm_buffer);
 433
 434         /* Only if PNVM selected in the mod param - load external NVM  */
 435         if (mvm->nvm_file_name) {
 436                 /* read External NVM file from the mod param */
 437                 ret = iwl_read_external_nvm(mvm->trans, mvm->nvm_file_name,
 438                                             mvm->nvm_sections);
 439                 if (ret) {
 440                         mvm->nvm_file_name = nvm_file_C;
 441
 442                         if ((ret == -EFAULT || ret == -ENOENT) &&
 443                             mvm->nvm_file_name) {
 444                                 /* in case nvm file was failed try again */
 445                                 ret = iwl_read_external_nvm(mvm->trans,
 446                                                             mvm->nvm_file_name,
 447                                                             mvm->nvm_sections);
 448                                 if (ret)
 449                                         return ret;
 450                         } else {
 451                                 return ret;
 452                         }
 453                 }
 454         }
 455
 456         /* parse the relevant nvm sections */
 457         mvm->nvm_data = iwl_parse_nvm_sections(mvm);
 458         if (!mvm->nvm_data)
 459                 return -ENODATA;
 460         IWL_DEBUG_EEPROM(mvm->trans->dev, "nvm version = %x\n",
 461                          mvm->nvm_data->nvm_version);
 462
 463         return 0;
 464 }
 465
 466 struct iwl_mcc_update_resp *
 467 iwl_mvm_update_mcc(struct iwl_mvm *mvm, const char *alpha2,
 468                    enum iwl_mcc_source src_id)
 469 {
 470         struct iwl_mcc_update_cmd mcc_update_cmd = {
 471                 .mcc = cpu_to_le16(alpha2[0] << 8 | alpha2[1]),
 472                 .source_id = (u8)src_id,
 473         };
 474         struct iwl_mcc_update_resp *resp_cp;
 475         struct iwl_rx_packet *pkt;
 476         struct iwl_host_cmd cmd = {
 477                 .id = MCC_UPDATE_CMD,
 478                 .flags = CMD_WANT_SKB,
 479                 .data = { &mcc_update_cmd },
 480         };
 481
 482         int ret;
 483         u32 status;
 484         int resp_len, n_channels;
 485         u16 mcc;
 486         bool resp_v2 = fw_has_capa(&mvm->fw->ucode_capa,
 487                                    IWL_UCODE_TLV_CAPA_LAR_SUPPORT_V2);
 488
 489         if (WARN_ON_ONCE(!iwl_mvm_is_lar_supported(mvm)))
 490                 return ERR_PTR(-EOPNOTSUPP);
 491
 492         cmd.len[0] = sizeof(struct iwl_mcc_update_cmd);
 493         if (!resp_v2)
 494                 cmd.len[0] = sizeof(struct iwl_mcc_update_cmd_v1);
 495
 496         IWL_DEBUG_LAR(mvm, "send MCC update to FW with '%c%c' src = %d\n",
 497                       alpha2[0], alpha2[1], src_id);
 498
 499         ret = iwl_mvm_send_cmd(mvm, &cmd);
 500         if (ret)
 501                 return ERR_PTR(ret);
 502
 503         pkt = cmd.resp_pkt;
 504
 505         /* Extract MCC response */
 506         if (resp_v2) {
 507                 struct iwl_mcc_update_resp *mcc_resp = (void *)pkt->data;
 508
 509                 n_channels =  __le32_to_cpu(mcc_resp->n_channels);
 510                 resp_len = sizeof(struct iwl_mcc_update_resp) +
 511                            n_channels * sizeof(__le32);
 512                 resp_cp = kmemdup(mcc_resp, resp_len, GFP_KERNEL);
 513                 if (!resp_cp) {
 514                         resp_cp = ERR_PTR(-ENOMEM);
 515                         goto exit;
 516                 }
 517         } else {
 518                 struct iwl_mcc_update_resp_v1 *mcc_resp_v1 = (void *)pkt->data;
 519
 520                 n_channels =  __le32_to_cpu(mcc_resp_v1->n_channels);
 521                 resp_len = sizeof(struct iwl_mcc_update_resp) +
 522                            n_channels * sizeof(__le32);
 523                 resp_cp = kzalloc(resp_len, GFP_KERNEL);
 524                 if (!resp_cp) {
 525                         resp_cp = ERR_PTR(-ENOMEM);
 526                         goto exit;
 527                 }
 528
 529                 resp_cp->status = mcc_resp_v1->status;
 530                 resp_cp->mcc = mcc_resp_v1->mcc;
 531                 resp_cp->cap = mcc_resp_v1->cap;
 532                 resp_cp->source_id = mcc_resp_v1->source_id;
 533                 resp_cp->n_channels = mcc_resp_v1->n_channels;
 534                 memcpy(resp_cp->channels, mcc_resp_v1->channels,
 535                        n_channels * sizeof(__le32));
 536         }
 537
 538         status = le32_to_cpu(resp_cp->status);
 539
 540         mcc = le16_to_cpu(resp_cp->mcc);
 541
 542         /* W/A for a FW/NVM issue - returns 0x00 for the world domain */
 543         if (mcc == 0) {
 544                 mcc = 0x3030;  /* "00" - world */
 545                 resp_cp->mcc = cpu_to_le16(mcc);
 546         }
 547
 548         IWL_DEBUG_LAR(mvm,
 549                       "MCC response status: 0x%x. new MCC: 0x%x ('%c%c') n_chans: %d\n",
 550                       status, mcc, mcc >> 8, mcc & 0xff, n_channels);
 551
 552 exit:
 553         iwl_free_resp(&cmd);
 554         return resp_cp;
 555 }
 556
 557 int iwl_mvm_init_mcc(struct iwl_mvm *mvm)
 558 {
 559         bool tlv_lar;
 560         bool nvm_lar;
 561         int retval;
 562         struct ieee80211_regdomain *regd;
 563         char mcc[3];
 564
 565         if (mvm->cfg->nvm_type == IWL_NVM_EXT) {
 566                 tlv_lar = fw_has_capa(&mvm->fw->ucode_capa,
 567                                       IWL_UCODE_TLV_CAPA_LAR_SUPPORT);
 568                 nvm_lar = mvm->nvm_data->lar_enabled;
 569                 if (tlv_lar != nvm_lar)
 570                         IWL_INFO(mvm,
 571                                  "Conflict between TLV & NVM regarding enabling LAR (TLV = %s NVM =%s)\n",
 572                                  tlv_lar ? "enabled" : "disabled",
 573                                  nvm_lar ? "enabled" : "disabled");
 574         }
 575
 576         if (!iwl_mvm_is_lar_supported(mvm))
 577                 return 0;
 578
 579         /*
 580          * try to replay the last set MCC to FW. If it doesn't exist,
 581          * queue an update to cfg80211 to retrieve the default alpha2 from FW.
 582          */
 583         retval = iwl_mvm_init_fw_regd(mvm);
 584         if (retval != -ENOENT)
 585                 return retval;
 586
 587         /*
 588          * Driver regulatory hint for initial update, this also informs the
 589          * firmware we support wifi location updates.
 590          * Disallow scans that might crash the FW while the LAR regdomain
 591          * is not set.
 592          */
 593         mvm->lar_regdom_set = false;
 594
 595         regd = iwl_mvm_get_current_regdomain(mvm, NULL);
 596         if (IS_ERR_OR_NULL(regd))
 597                 return -EIO;
 598
 599         if (iwl_mvm_is_wifi_mcc_supported(mvm) &&
 600             !iwl_acpi_get_mcc(mvm->dev, mcc)) {
 601                 kfree(regd);
 602                 regd = iwl_mvm_get_regdomain(mvm->hw->wiphy, mcc,
 603                                              MCC_SOURCE_BIOS, NULL);
 604                 if (IS_ERR_OR_NULL(regd))
 605                         return -EIO;
 606         }
 607
 608         retval = regulatory_set_wiphy_regd_sync_rtnl(mvm->hw->wiphy, regd);
 609         kfree(regd);
 610         return retval;
 611 }
 612
 613 void iwl_mvm_rx_chub_update_mcc(struct iwl_mvm *mvm,
 614                                 struct iwl_rx_cmd_buffer *rxb)
 615 {
 616         struct iwl_rx_packet *pkt = rxb_addr(rxb);
 617         struct iwl_mcc_chub_notif *notif = (void *)pkt->data;
 618         enum iwl_mcc_source src;
 619         char mcc[3];
 620         struct ieee80211_regdomain *regd;
 621
 622         lockdep_assert_held(&mvm->mutex);
 623
 624         if (iwl_mvm_is_vif_assoc(mvm) && notif->source_id == MCC_SOURCE_WIFI) {
 625                 IWL_DEBUG_LAR(mvm, "Ignore mcc update while associated\n");
 626                 return;
 627         }
 628
 629         if (WARN_ON_ONCE(!iwl_mvm_is_lar_supported(mvm)))
 630                 return;
 631
 632         mcc[0] = le16_to_cpu(notif->mcc) >> 8;
 633         mcc[1] = le16_to_cpu(notif->mcc) & 0xff;
 634         mcc[2] = '\0';
 635         src = notif->source_id;
 636
 637         IWL_DEBUG_LAR(mvm,
 638                       "RX: received chub update mcc cmd (mcc '%s' src %d)\n",
 639                       mcc, src);
 640         regd = iwl_mvm_get_regdomain(mvm->hw->wiphy, mcc, src, NULL);
 641         if (IS_ERR_OR_NULL(regd))
 642                 return;
 643
 644         regulatory_set_wiphy_regd(mvm->hw->wiphy, regd);
 645         kfree(regd);
 646 }