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

   1 // SPDX-License-Identifier: GPL-2.0 OR BSD-3-Clause
   2 /*
   3  * Copyright (C) 2012-2014, 2018-2019, 2021-2023 Intel Corporation
   4  * Copyright (C) 2013-2015 Intel Mobile Communications GmbH
   5  * Copyright (C) 2016-2017 Intel Deutschland GmbH
   6  */
   7 #include <linux/firmware.h>
   8 #include <linux/rtnetlink.h>
   9 #include "iwl-trans.h"
  10 #include "iwl-csr.h"
  11 #include "mvm.h"
  12 #include "iwl-eeprom-parse.h"
  13 #include "iwl-eeprom-read.h"
  14 #include "iwl-nvm-parse.h"
  15 #include "iwl-prph.h"
  16 #include "fw/acpi.h"
  17
  18 /* Default NVM size to read */
  19 #define IWL_NVM_DEFAULT_CHUNK_SIZE (2 * 1024)
  20
  21 #define NVM_WRITE_OPCODE 1
  22 #define NVM_READ_OPCODE 0
  23
  24 /* load nvm chunk response */
  25 enum {
  26         READ_NVM_CHUNK_SUCCEED = 0,
  27         READ_NVM_CHUNK_NOT_VALID_ADDRESS = 1
  28 };
  29
  30 /*
  31  * prepare the NVM host command w/ the pointers to the nvm buffer
  32  * and send it to fw
  33  */
  34 static int iwl_nvm_write_chunk(struct iwl_mvm *mvm, u16 section,
  35                                u16 offset, u16 length, const u8 *data)
  36 {
  37         struct iwl_nvm_access_cmd nvm_access_cmd = {
  38                 .offset = cpu_to_le16(offset),
  39                 .length = cpu_to_le16(length),
  40                 .type = cpu_to_le16(section),
  41                 .op_code = NVM_WRITE_OPCODE,
  42         };
  43         struct iwl_host_cmd cmd = {
  44                 .id = NVM_ACCESS_CMD,
  45                 .len = { sizeof(struct iwl_nvm_access_cmd), length },
  46                 .flags = CMD_WANT_SKB | CMD_SEND_IN_RFKILL,
  47                 .data = { &nvm_access_cmd, data },
  48                 /* data may come from vmalloc, so use _DUP */
  49                 .dataflags = { 0, IWL_HCMD_DFL_DUP },
  50         };
  51         struct iwl_rx_packet *pkt;
  52         struct iwl_nvm_access_resp *nvm_resp;
  53         int ret;
  54
  55         ret = iwl_mvm_send_cmd(mvm, &cmd);
  56         if (ret)
  57                 return ret;
  58
  59         pkt = cmd.resp_pkt;
  60         /* Extract & check NVM write response */
  61         nvm_resp = (void *)pkt->data;
  62         if (le16_to_cpu(nvm_resp->status) != READ_NVM_CHUNK_SUCCEED) {
  63                 IWL_ERR(mvm,
  64                         "NVM access write command failed for section %u (status = 0x%x)\n",
  65                         section, le16_to_cpu(nvm_resp->status));
  66                 ret = -EIO;
  67         }
  68
  69         iwl_free_resp(&cmd);
  70         return ret;
  71 }
  72
  73 static int iwl_nvm_read_chunk(struct iwl_mvm *mvm, u16 section,
  74                               u16 offset, u16 length, u8 *data)
  75 {
  76         struct iwl_nvm_access_cmd nvm_access_cmd = {
  77                 .offset = cpu_to_le16(offset),
  78                 .length = cpu_to_le16(length),
  79                 .type = cpu_to_le16(section),
  80                 .op_code = NVM_READ_OPCODE,
  81         };
  82         struct iwl_nvm_access_resp *nvm_resp;
  83         struct iwl_rx_packet *pkt;
  84         struct iwl_host_cmd cmd = {
  85                 .id = NVM_ACCESS_CMD,
  86                 .flags = CMD_WANT_SKB | CMD_SEND_IN_RFKILL,
  87                 .data = { &nvm_access_cmd, },
  88         };
  89         int ret, bytes_read, offset_read;
  90         u8 *resp_data;
  91
  92         cmd.len[0] = sizeof(struct iwl_nvm_access_cmd);
  93
  94         ret = iwl_mvm_send_cmd(mvm, &cmd);
  95         if (ret)
  96                 return ret;
  97
  98         pkt = cmd.resp_pkt;
  99
 100         /* Extract NVM response */
 101         nvm_resp = (void *)pkt->data;
 102         ret = le16_to_cpu(nvm_resp->status);
 103         bytes_read = le16_to_cpu(nvm_resp->length);
 104         offset_read = le16_to_cpu(nvm_resp->offset);
 105         resp_data = nvm_resp->data;
 106         if (ret) {
 107                 if ((offset != 0) &&
 108                     (ret == READ_NVM_CHUNK_NOT_VALID_ADDRESS)) {
 109                         /*
 110                          * meaning of NOT_VALID_ADDRESS:
 111                          * driver try to read chunk from address that is
 112                          * multiple of 2K and got an error since addr is empty.
 113                          * meaning of (offset != 0): driver already
 114                          * read valid data from another chunk so this case
 115                          * is not an error.
 116                          */
 117                         IWL_DEBUG_EEPROM(mvm->trans->dev,
 118                                          "NVM access command failed on offset 0x%x since that section size is multiple 2K\n",
 119                                          offset);
 120                         ret = 0;
 121                 } else {
 122                         IWL_DEBUG_EEPROM(mvm->trans->dev,
 123                                          "NVM access command failed with status %d (device: %s)\n",
 124                                          ret, mvm->trans->name);
 125                         ret = -ENODATA;
 126                 }
 127                 goto exit;
 128         }
 129
 130         if (offset_read != offset) {
 131                 IWL_ERR(mvm, "NVM ACCESS response with invalid offset %d\n",
 132                         offset_read);
 133                 ret = -EINVAL;
 134                 goto exit;
 135         }
 136
 137         /* Write data to NVM */
 138         memcpy(data + offset, resp_data, bytes_read);
 139         ret = bytes_read;
 140
 141 exit:
 142         iwl_free_resp(&cmd);
 143         return ret;
 144 }
 145
 146 static int iwl_nvm_write_section(struct iwl_mvm *mvm, u16 section,
 147                                  const u8 *data, u16 length)
 148 {
 149         int offset = 0;
 150
 151         /* copy data in chunks of 2k (and remainder if any) */
 152
 153         while (offset < length) {
 154                 int chunk_size, ret;
 155
 156                 chunk_size = min(IWL_NVM_DEFAULT_CHUNK_SIZE,
 157                                  length - offset);
 158
 159                 ret = iwl_nvm_write_chunk(mvm, section, offset,
 160                                           chunk_size, data + offset);
 161                 if (ret < 0)
 162                         return ret;
 163
 164                 offset += chunk_size;
 165         }
 166
 167         return 0;
 168 }
 169
 170 /*
 171  * Reads an NVM section completely.
 172  * NICs prior to 7000 family doesn't have a real NVM, but just read
 173  * section 0 which is the EEPROM. Because the EEPROM reading is unlimited
 174  * by uCode, we need to manually check in this case that we don't
 175  * overflow and try to read more than the EEPROM size.
 176  * For 7000 family NICs, we supply the maximal size we can read, and
 177  * the uCode fills the response with as much data as we can,
 178  * without overflowing, so no check is needed.
 179  */
 180 static int iwl_nvm_read_section(struct iwl_mvm *mvm, u16 section,
 181                                 u8 *data, u32 size_read)
 182 {
 183         u16 length, offset = 0;
 184         int ret;
 185
 186         /* Set nvm section read length */
 187         length = IWL_NVM_DEFAULT_CHUNK_SIZE;
 188
 189         ret = length;
 190
 191         /* Read the NVM until exhausted (reading less than requested) */
 192         while (ret == length) {
 193                 /* Check no memory assumptions fail and cause an overflow */
 194                 if ((size_read + offset + length) >
 195                     mvm->trans->trans_cfg->base_params->eeprom_size) {
 196                         IWL_ERR(mvm, "EEPROM size is too small for NVM\n");
 197                         return -ENOBUFS;
 198                 }
 199
 200                 ret = iwl_nvm_read_chunk(mvm, section, offset, length, data);
 201                 if (ret < 0) {
 202                         IWL_DEBUG_EEPROM(mvm->trans->dev,
 203                                          "Cannot read NVM from section %d offset %d, length %d\n",
 204                                          section, offset, length);
 205                         return ret;
 206                 }
 207                 offset += ret;
 208         }
 209
 210         iwl_nvm_fixups(mvm->trans->hw_id, section, data, offset);
 211
 212         IWL_DEBUG_EEPROM(mvm->trans->dev,
 213                          "NVM section %d read completed\n", section);
 214         return offset;
 215 }
 216
 217 static struct iwl_nvm_data *
 218 iwl_parse_nvm_sections(struct iwl_mvm *mvm)
 219 {
 220         struct iwl_nvm_section *sections = mvm->nvm_sections;
 221         const __be16 *hw;
 222         const __le16 *sw, *calib, *regulatory, *mac_override, *phy_sku;
 223         u8 tx_ant = mvm->fw->valid_tx_ant;
 224         u8 rx_ant = mvm->fw->valid_rx_ant;
 225         int regulatory_type;
 226
 227         /* Checking for required sections */
 228         if (mvm->trans->cfg->nvm_type == IWL_NVM) {
 229                 if (!mvm->nvm_sections[NVM_SECTION_TYPE_SW].data ||
 230                     !mvm->nvm_sections[mvm->cfg->nvm_hw_section_num].data) {
 231                         IWL_ERR(mvm, "Can't parse empty OTP/NVM sections\n");
 232                         return NULL;
 233                 }
 234         } else {
 235                 if (mvm->trans->cfg->nvm_type == IWL_NVM_SDP)
 236                         regulatory_type = NVM_SECTION_TYPE_REGULATORY_SDP;
 237                 else
 238                         regulatory_type = NVM_SECTION_TYPE_REGULATORY;
 239
 240                 /* SW and REGULATORY sections are mandatory */
 241                 if (!mvm->nvm_sections[NVM_SECTION_TYPE_SW].data ||
 242                     !mvm->nvm_sections[regulatory_type].data) {
 243                         IWL_ERR(mvm,
 244                                 "Can't parse empty family 8000 OTP/NVM sections\n");
 245                         return NULL;
 246                 }
 247                 /* MAC_OVERRIDE or at least HW section must exist */
 248                 if (!mvm->nvm_sections[mvm->cfg->nvm_hw_section_num].data &&
 249                     !mvm->nvm_sections[NVM_SECTION_TYPE_MAC_OVERRIDE].data) {
 250                         IWL_ERR(mvm,
 251                                 "Can't parse mac_address, empty sections\n");
 252                         return NULL;
 253                 }
 254
 255                 /* PHY_SKU section is mandatory in B0 */
 256                 if (mvm->trans->cfg->nvm_type == IWL_NVM_EXT &&
 257                     !mvm->nvm_sections[NVM_SECTION_TYPE_PHY_SKU].data) {
 258                         IWL_ERR(mvm,
 259                                 "Can't parse phy_sku in B0, empty sections\n");
 260                         return NULL;
 261                 }
 262         }
 263
 264         hw = (const __be16 *)sections[mvm->cfg->nvm_hw_section_num].data;
 265         sw = (const __le16 *)sections[NVM_SECTION_TYPE_SW].data;
 266         calib = (const __le16 *)sections[NVM_SECTION_TYPE_CALIBRATION].data;
 267         mac_override =
 268                 (const __le16 *)sections[NVM_SECTION_TYPE_MAC_OVERRIDE].data;
 269         phy_sku = (const __le16 *)sections[NVM_SECTION_TYPE_PHY_SKU].data;
 270
 271         regulatory = mvm->trans->cfg->nvm_type == IWL_NVM_SDP ?
 272                 (const __le16 *)sections[NVM_SECTION_TYPE_REGULATORY_SDP].data :
 273                 (const __le16 *)sections[NVM_SECTION_TYPE_REGULATORY].data;
 274
 275         if (mvm->set_tx_ant)
 276                 tx_ant &= mvm->set_tx_ant;
 277
 278         if (mvm->set_rx_ant)
 279                 rx_ant &= mvm->set_rx_ant;
 280
 281         return iwl_parse_nvm_data(mvm->trans, mvm->cfg, mvm->fw, hw, sw, calib,
 282                                   regulatory, mac_override, phy_sku,
 283                                   tx_ant, rx_ant);
 284 }
 285
 286 /* Loads the NVM data stored in mvm->nvm_sections into the NIC */
 287 int iwl_mvm_load_nvm_to_nic(struct iwl_mvm *mvm)
 288 {
 289         int i, ret = 0;
 290         struct iwl_nvm_section *sections = mvm->nvm_sections;
 291
 292         IWL_DEBUG_EEPROM(mvm->trans->dev, "'Write to NVM\n");
 293
 294         for (i = 0; i < ARRAY_SIZE(mvm->nvm_sections); i++) {
 295                 if (!mvm->nvm_sections[i].data || !mvm->nvm_sections[i].length)
 296                         continue;
 297                 ret = iwl_nvm_write_section(mvm, i, sections[i].data,
 298                                             sections[i].length);
 299                 if (ret < 0) {
 300                         IWL_ERR(mvm, "iwl_mvm_send_cmd failed: %d\n", ret);
 301                         break;
 302                 }
 303         }
 304         return ret;
 305 }
 306
 307 int iwl_nvm_init(struct iwl_mvm *mvm)
 308 {
 309         int ret, section;
 310         u32 size_read = 0;
 311         u8 *nvm_buffer, *temp;
 312         const char *nvm_file_C = mvm->cfg->default_nvm_file_C_step;
 313
 314         if (WARN_ON_ONCE(mvm->cfg->nvm_hw_section_num >= NVM_MAX_NUM_SECTIONS))
 315                 return -EINVAL;
 316
 317         /* load NVM values from nic */
 318         /* Read From FW NVM */
 319         IWL_DEBUG_EEPROM(mvm->trans->dev, "Read from NVM\n");
 320
 321         nvm_buffer = kmalloc(mvm->trans->trans_cfg->base_params->eeprom_size,
 322                              GFP_KERNEL);
 323         if (!nvm_buffer)
 324                 return -ENOMEM;
 325         for (section = 0; section < NVM_MAX_NUM_SECTIONS; section++) {
 326                 /* we override the constness for initial read */
 327                 ret = iwl_nvm_read_section(mvm, section, nvm_buffer,
 328                                            size_read);
 329                 if (ret == -ENODATA) {
 330                         ret = 0;
 331                         continue;
 332                 }
 333                 if (ret < 0)
 334                         break;
 335                 size_read += ret;
 336                 temp = kmemdup(nvm_buffer, ret, GFP_KERNEL);
 337                 if (!temp) {
 338                         ret = -ENOMEM;
 339                         break;
 340                 }
 341
 342                 iwl_nvm_fixups(mvm->trans->hw_id, section, temp, ret);
 343
 344                 mvm->nvm_sections[section].data = temp;
 345                 mvm->nvm_sections[section].length = ret;
 346
 347 #ifdef CONFIG_IWLWIFI_DEBUGFS
 348                 switch (section) {
 349                 case NVM_SECTION_TYPE_SW:
 350                         mvm->nvm_sw_blob.data = temp;
 351                         mvm->nvm_sw_blob.size  = ret;
 352                         break;
 353                 case NVM_SECTION_TYPE_CALIBRATION:
 354                         mvm->nvm_calib_blob.data = temp;
 355                         mvm->nvm_calib_blob.size  = ret;
 356                         break;
 357                 case NVM_SECTION_TYPE_PRODUCTION:
 358                         mvm->nvm_prod_blob.data = temp;
 359                         mvm->nvm_prod_blob.size  = ret;
 360                         break;
 361                 case NVM_SECTION_TYPE_PHY_SKU:
 362                         mvm->nvm_phy_sku_blob.data = temp;
 363                         mvm->nvm_phy_sku_blob.size  = ret;
 364                         break;
 365                 case NVM_SECTION_TYPE_REGULATORY_SDP:
 366                 case NVM_SECTION_TYPE_REGULATORY:
 367                         mvm->nvm_reg_blob.data = temp;
 368                         mvm->nvm_reg_blob.size  = ret;
 369                         break;
 370                 default:
 371                         if (section == mvm->cfg->nvm_hw_section_num) {
 372                                 mvm->nvm_hw_blob.data = temp;
 373                                 mvm->nvm_hw_blob.size = ret;
 374                                 break;
 375                         }
 376                 }
 377 #endif
 378         }
 379         if (!size_read)
 380                 IWL_ERR(mvm, "OTP is blank\n");
 381         kfree(nvm_buffer);
 382
 383         /* Only if PNVM selected in the mod param - load external NVM  */
 384         if (mvm->nvm_file_name) {
 385                 /* read External NVM file from the mod param */
 386                 ret = iwl_read_external_nvm(mvm->trans, mvm->nvm_file_name,
 387                                             mvm->nvm_sections);
 388                 if (ret) {
 389                         mvm->nvm_file_name = nvm_file_C;
 390
 391                         if ((ret == -EFAULT || ret == -ENOENT) &&
 392                             mvm->nvm_file_name) {
 393                                 /* in case nvm file was failed try again */
 394                                 ret = iwl_read_external_nvm(mvm->trans,
 395                                                             mvm->nvm_file_name,
 396                                                             mvm->nvm_sections);
 397                                 if (ret)
 398                                         return ret;
 399                         } else {
 400                                 return ret;
 401                         }
 402                 }
 403         }
 404
 405         /* parse the relevant nvm sections */
 406         mvm->nvm_data = iwl_parse_nvm_sections(mvm);
 407         if (!mvm->nvm_data)
 408                 return -ENODATA;
 409         IWL_DEBUG_EEPROM(mvm->trans->dev, "nvm version = %x\n",
 410                          mvm->nvm_data->nvm_version);
 411
 412         return ret < 0 ? ret : 0;
 413 }
 414
 415 struct iwl_mcc_update_resp_v8 *
 416 iwl_mvm_update_mcc(struct iwl_mvm *mvm, const char *alpha2,
 417                    enum iwl_mcc_source src_id)
 418 {
 419         struct iwl_mcc_update_cmd mcc_update_cmd = {
 420                 .mcc = cpu_to_le16(alpha2[0] << 8 | alpha2[1]),
 421                 .source_id = (u8)src_id,
 422         };
 423         struct iwl_mcc_update_resp_v8 *resp_cp;
 424         struct iwl_rx_packet *pkt;
 425         struct iwl_host_cmd cmd = {
 426                 .id = MCC_UPDATE_CMD,
 427                 .flags = CMD_WANT_SKB | CMD_SEND_IN_RFKILL,
 428                 .data = { &mcc_update_cmd },
 429         };
 430
 431         int ret, resp_ver;
 432         u32 status;
 433         int resp_len, n_channels;
 434         u16 mcc;
 435
 436         if (WARN_ON_ONCE(!iwl_mvm_is_lar_supported(mvm)))
 437                 return ERR_PTR(-EOPNOTSUPP);
 438
 439         cmd.len[0] = sizeof(struct iwl_mcc_update_cmd);
 440
 441         IWL_DEBUG_LAR(mvm, "send MCC update to FW with '%c%c' src = %d\n",
 442                       alpha2[0], alpha2[1], src_id);
 443
 444         ret = iwl_mvm_send_cmd(mvm, &cmd);
 445         if (ret)
 446                 return ERR_PTR(ret);
 447
 448         pkt = cmd.resp_pkt;
 449
 450         resp_ver = iwl_fw_lookup_notif_ver(mvm->fw, IWL_ALWAYS_LONG_GROUP,
 451                                            MCC_UPDATE_CMD, 0);
 452
 453         /* Extract MCC response */
 454         if (resp_ver >= 8) {
 455                 struct iwl_mcc_update_resp_v8 *mcc_resp_v8 = (void *)pkt->data;
 456
 457                 n_channels =  __le32_to_cpu(mcc_resp_v8->n_channels);
 458                 if (iwl_rx_packet_payload_len(pkt) !=
 459                     struct_size(mcc_resp_v8, channels, n_channels)) {
 460                         resp_cp = ERR_PTR(-EINVAL);
 461                         goto exit;
 462                 }
 463                 resp_len = struct_size(resp_cp, channels, n_channels);
 464                 resp_cp = kzalloc(resp_len, GFP_KERNEL);
 465                 if (!resp_cp) {
 466                         resp_cp = ERR_PTR(-ENOMEM);
 467                         goto exit;
 468                 }
 469                 resp_cp->status = mcc_resp_v8->status;
 470                 resp_cp->mcc = mcc_resp_v8->mcc;
 471                 resp_cp->cap = mcc_resp_v8->cap;
 472                 resp_cp->source_id = mcc_resp_v8->source_id;
 473                 resp_cp->time = mcc_resp_v8->time;
 474                 resp_cp->geo_info = mcc_resp_v8->geo_info;
 475                 resp_cp->n_channels = mcc_resp_v8->n_channels;
 476                 memcpy(resp_cp->channels, mcc_resp_v8->channels,
 477                        n_channels * sizeof(__le32));
 478         } else if (fw_has_capa(&mvm->fw->ucode_capa,
 479                                IWL_UCODE_TLV_CAPA_MCC_UPDATE_11AX_SUPPORT)) {
 480                 struct iwl_mcc_update_resp_v4 *mcc_resp_v4 = (void *)pkt->data;
 481
 482                 n_channels =  __le32_to_cpu(mcc_resp_v4->n_channels);
 483                 if (iwl_rx_packet_payload_len(pkt) !=
 484                     struct_size(mcc_resp_v4, channels, n_channels)) {
 485                         resp_cp = ERR_PTR(-EINVAL);
 486                         goto exit;
 487                 }
 488                 resp_len = struct_size(resp_cp, channels, n_channels);
 489                 resp_cp = kzalloc(resp_len, GFP_KERNEL);
 490                 if (!resp_cp) {
 491                         resp_cp = ERR_PTR(-ENOMEM);
 492                         goto exit;
 493                 }
 494
 495                 resp_cp->status = mcc_resp_v4->status;
 496                 resp_cp->mcc = mcc_resp_v4->mcc;
 497                 resp_cp->cap = cpu_to_le32(le16_to_cpu(mcc_resp_v4->cap));
 498                 resp_cp->source_id = mcc_resp_v4->source_id;
 499                 resp_cp->time = mcc_resp_v4->time;
 500                 resp_cp->geo_info = mcc_resp_v4->geo_info;
 501                 resp_cp->n_channels = mcc_resp_v4->n_channels;
 502                 memcpy(resp_cp->channels, mcc_resp_v4->channels,
 503                        n_channels * sizeof(__le32));
 504         } else {
 505                 struct iwl_mcc_update_resp_v3 *mcc_resp_v3 = (void *)pkt->data;
 506
 507                 n_channels =  __le32_to_cpu(mcc_resp_v3->n_channels);
 508                 if (iwl_rx_packet_payload_len(pkt) !=
 509                     struct_size(mcc_resp_v3, channels, n_channels)) {
 510                         resp_cp = ERR_PTR(-EINVAL);
 511                         goto exit;
 512                 }
 513                 resp_len = struct_size(resp_cp, channels, n_channels);
 514                 resp_cp = kzalloc(resp_len, GFP_KERNEL);
 515                 if (!resp_cp) {
 516                         resp_cp = ERR_PTR(-ENOMEM);
 517                         goto exit;
 518                 }
 519
 520                 resp_cp->status = mcc_resp_v3->status;
 521                 resp_cp->mcc = mcc_resp_v3->mcc;
 522                 resp_cp->cap = cpu_to_le32(mcc_resp_v3->cap);
 523                 resp_cp->source_id = mcc_resp_v3->source_id;
 524                 resp_cp->time = mcc_resp_v3->time;
 525                 resp_cp->geo_info = mcc_resp_v3->geo_info;
 526                 resp_cp->n_channels = mcc_resp_v3->n_channels;
 527                 memcpy(resp_cp->channels, mcc_resp_v3->channels,
 528                        n_channels * sizeof(__le32));
 529         }
 530
 531         status = le32_to_cpu(resp_cp->status);
 532
 533         mcc = le16_to_cpu(resp_cp->mcc);
 534
 535         /* W/A for a FW/NVM issue - returns 0x00 for the world domain */
 536         if (mcc == 0) {
 537                 mcc = 0x3030;  /* "00" - world */
 538                 resp_cp->mcc = cpu_to_le16(mcc);
 539         }
 540
 541         IWL_DEBUG_LAR(mvm,
 542                       "MCC response status: 0x%x. new MCC: 0x%x ('%c%c') n_chans: %d\n",
 543                       status, mcc, mcc >> 8, mcc & 0xff, n_channels);
 544
 545 exit:
 546         iwl_free_resp(&cmd);
 547         return resp_cp;
 548 }
 549
 550 int iwl_mvm_init_mcc(struct iwl_mvm *mvm)
 551 {
 552         bool tlv_lar;
 553         bool nvm_lar;
 554         int retval;
 555         struct ieee80211_regdomain *regd;
 556         char mcc[3];
 557
 558         if (mvm->cfg->nvm_type == IWL_NVM_EXT) {
 559                 tlv_lar = fw_has_capa(&mvm->fw->ucode_capa,
 560                                       IWL_UCODE_TLV_CAPA_LAR_SUPPORT);
 561                 nvm_lar = mvm->nvm_data->lar_enabled;
 562                 if (tlv_lar != nvm_lar)
 563                         IWL_INFO(mvm,
 564                                  "Conflict between TLV & NVM regarding enabling LAR (TLV = %s NVM =%s)\n",
 565                                  tlv_lar ? "enabled" : "disabled",
 566                                  nvm_lar ? "enabled" : "disabled");
 567         }
 568
 569         if (!iwl_mvm_is_lar_supported(mvm))
 570                 return 0;
 571
 572         /*
 573          * try to replay the last set MCC to FW. If it doesn't exist,
 574          * queue an update to cfg80211 to retrieve the default alpha2 from FW.
 575          */
 576         retval = iwl_mvm_init_fw_regd(mvm, true);
 577         if (retval != -ENOENT)
 578                 return retval;
 579
 580         /*
 581          * Driver regulatory hint for initial update, this also informs the
 582          * firmware we support wifi location updates.
 583          * Disallow scans that might crash the FW while the LAR regdomain
 584          * is not set.
 585          */
 586         mvm->lar_regdom_set = false;
 587
 588         regd = iwl_mvm_get_current_regdomain(mvm, NULL);
 589         if (IS_ERR_OR_NULL(regd))
 590                 return -EIO;
 591
 592         if (iwl_mvm_is_wifi_mcc_supported(mvm) &&
 593             !iwl_bios_get_mcc(&mvm->fwrt, mcc)) {
 594                 kfree(regd);
 595                 regd = iwl_mvm_get_regdomain(mvm->hw->wiphy, mcc,
 596                                              MCC_SOURCE_BIOS, NULL);
 597                 if (IS_ERR_OR_NULL(regd))
 598                         return -EIO;
 599         }
 600
 601         retval = regulatory_set_wiphy_regd_sync(mvm->hw->wiphy, regd);
 602         kfree(regd);
 603         return retval;
 604 }
 605
 606 void iwl_mvm_rx_chub_update_mcc(struct iwl_mvm *mvm,
 607                                 struct iwl_rx_cmd_buffer *rxb)
 608 {
 609         struct iwl_rx_packet *pkt = rxb_addr(rxb);
 610         struct iwl_mcc_chub_notif *notif = (void *)pkt->data;
 611         enum iwl_mcc_source src;
 612         char mcc[3];
 613         struct ieee80211_regdomain *regd;
 614         int wgds_tbl_idx;
 615
 616         lockdep_assert_held(&mvm->mutex);
 617
 618         if (iwl_mvm_is_vif_assoc(mvm) && notif->source_id == MCC_SOURCE_WIFI) {
 619                 IWL_DEBUG_LAR(mvm, "Ignore mcc update while associated\n");
 620                 return;
 621         }
 622
 623         if (WARN_ON_ONCE(!iwl_mvm_is_lar_supported(mvm)))
 624                 return;
 625
 626         mcc[0] = le16_to_cpu(notif->mcc) >> 8;
 627         mcc[1] = le16_to_cpu(notif->mcc) & 0xff;
 628         mcc[2] = '\0';
 629         src = notif->source_id;
 630
 631         IWL_DEBUG_LAR(mvm,
 632                       "RX: received chub update mcc cmd (mcc '%s' src %d)\n",
 633                       mcc, src);
 634         regd = iwl_mvm_get_regdomain(mvm->hw->wiphy, mcc, src, NULL);
 635         if (IS_ERR_OR_NULL(regd))
 636                 return;
 637
 638         wgds_tbl_idx = iwl_mvm_get_sar_geo_profile(mvm);
 639         if (wgds_tbl_idx < 1)
 640                 IWL_DEBUG_INFO(mvm,
 641                                "SAR WGDS is disabled or error received (%d)\n",
 642                                wgds_tbl_idx);
 643         else
 644                 IWL_DEBUG_INFO(mvm, "SAR WGDS: geo profile %d is configured\n",
 645                                wgds_tbl_idx);
 646
 647         regulatory_set_wiphy_regd(mvm->hw->wiphy, regd);
 648         kfree(regd);
 649 }