drivers/net/wireless/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 - 2014 Intel Mobile Communications GmbH
  10  *
  11  * This program is free software; you can redistribute it and/or modify
  12  * it under the terms of version 2 of the GNU General Public License as
  13  * published by the Free Software Foundation.
  14  *
  15  * This program is distributed in the hope that it will be useful, but
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  28  * Contact Information:
  29  *  Intel Linux Wireless <ilw@linux.intel.com>
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  31  *
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  33  *
  34  * Copyright(c) 2012 - 2014 Intel Corporation. All rights reserved.
  35  * Copyright(c) 2013 - 2014 Intel Mobile Communications GmbH
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  39  * modification, are permitted provided that the following conditions
  40  * are met:
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  43  *    notice, this list of conditions and the following disclaimer.
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  46  *    the documentation and/or other materials provided with the
  47  *    distribution.
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  49  *    contributors may be used to endorse or promote products derived
  50  *    from this software without specific prior written permission.
  51  *
  52  * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
  53  * "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
  54  * LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
  55  * A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
  56  * OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
  57  * SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
  58  * LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
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  60  * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
  61  * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
  62  * OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
  63  *
  64  *****************************************************************************/
  65 #include <linux/firmware.h>
  66 #include <linux/rtnetlink.h>
  67 #include "iwl-trans.h"
  68 #include "iwl-csr.h"
  69 #include "mvm.h"
  70 #include "iwl-eeprom-parse.h"
  71 #include "iwl-eeprom-read.h"
  72 #include "iwl-nvm-parse.h"
  73 #include "iwl-prph.h"
  74
  75 /* Default NVM size to read */
  76 #define IWL_NVM_DEFAULT_CHUNK_SIZE (2*1024)
  77 #define IWL_MAX_NVM_SECTION_SIZE        0x1b58
  78 #define IWL_MAX_NVM_8000A_SECTION_SIZE  0xffc
  79 #define IWL_MAX_NVM_8000B_SECTION_SIZE  0x1ffc
  80
  81 #define NVM_WRITE_OPCODE 1
  82 #define NVM_READ_OPCODE 0
  83
  84 /* load nvm chunk response */
  85 enum {
  86         READ_NVM_CHUNK_SUCCEED = 0,
  87         READ_NVM_CHUNK_NOT_VALID_ADDRESS = 1
  88 };
  89
  90 /*
  91  * prepare the NVM host command w/ the pointers to the nvm buffer
  92  * and send it to fw
  93  */
  94 static int iwl_nvm_write_chunk(struct iwl_mvm *mvm, u16 section,
  95                                u16 offset, u16 length, const u8 *data)
  96 {
  97         struct iwl_nvm_access_cmd nvm_access_cmd = {
  98                 .offset = cpu_to_le16(offset),
  99                 .length = cpu_to_le16(length),
 100                 .type = cpu_to_le16(section),
 101                 .op_code = NVM_WRITE_OPCODE,
 102         };
 103         struct iwl_host_cmd cmd = {
 104                 .id = NVM_ACCESS_CMD,
 105                 .len = { sizeof(struct iwl_nvm_access_cmd), length },
 106                 .flags = CMD_SEND_IN_RFKILL,
 107                 .data = { &nvm_access_cmd, data },
 108                 /* data may come from vmalloc, so use _DUP */
 109                 .dataflags = { 0, IWL_HCMD_DFL_DUP },
 110         };
 111
 112         return iwl_mvm_send_cmd(mvm, &cmd);
 113 }
 114
 115 static int iwl_nvm_read_chunk(struct iwl_mvm *mvm, u16 section,
 116                               u16 offset, u16 length, u8 *data)
 117 {
 118         struct iwl_nvm_access_cmd nvm_access_cmd = {
 119                 .offset = cpu_to_le16(offset),
 120                 .length = cpu_to_le16(length),
 121                 .type = cpu_to_le16(section),
 122                 .op_code = NVM_READ_OPCODE,
 123         };
 124         struct iwl_nvm_access_resp *nvm_resp;
 125         struct iwl_rx_packet *pkt;
 126         struct iwl_host_cmd cmd = {
 127                 .id = NVM_ACCESS_CMD,
 128                 .flags = CMD_WANT_SKB | CMD_SEND_IN_RFKILL,
 129                 .data = { &nvm_access_cmd, },
 130         };
 131         int ret, bytes_read, offset_read;
 132         u8 *resp_data;
 133
 134         cmd.len[0] = sizeof(struct iwl_nvm_access_cmd);
 135
 136         ret = iwl_mvm_send_cmd(mvm, &cmd);
 137         if (ret)
 138                 return ret;
 139
 140         pkt = cmd.resp_pkt;
 141         if (pkt->hdr.flags & IWL_CMD_FAILED_MSK) {
 142                 IWL_ERR(mvm, "Bad return from NVM_ACCES_COMMAND (0x%08X)\n",
 143                         pkt->hdr.flags);
 144                 ret = -EIO;
 145                 goto exit;
 146         }
 147
 148         /* Extract NVM response */
 149         nvm_resp = (void *)pkt->data;
 150         ret = le16_to_cpu(nvm_resp->status);
 151         bytes_read = le16_to_cpu(nvm_resp->length);
 152         offset_read = le16_to_cpu(nvm_resp->offset);
 153         resp_data = nvm_resp->data;
 154         if (ret) {
 155                 if ((offset != 0) &&
 156                     (ret == READ_NVM_CHUNK_NOT_VALID_ADDRESS)) {
 157                         /*
 158                          * meaning of NOT_VALID_ADDRESS:
 159                          * driver try to read chunk from address that is
 160                          * multiple of 2K and got an error since addr is empty.
 161                          * meaning of (offset != 0): driver already
 162                          * read valid data from another chunk so this case
 163                          * is not an error.
 164                          */
 165                         IWL_DEBUG_EEPROM(mvm->trans->dev,
 166                                          "NVM access command failed on offset 0x%x since that section size is multiple 2K\n",
 167                                          offset);
 168                         ret = 0;
 169                 } else {
 170                         IWL_DEBUG_EEPROM(mvm->trans->dev,
 171                                          "NVM access command failed with status %d (device: %s)\n",
 172                                          ret, mvm->cfg->name);
 173                         ret = -EIO;
 174                 }
 175                 goto exit;
 176         }
 177
 178         if (offset_read != offset) {
 179                 IWL_ERR(mvm, "NVM ACCESS response with invalid offset %d\n",
 180                         offset_read);
 181                 ret = -EINVAL;
 182                 goto exit;
 183         }
 184
 185         /* Write data to NVM */
 186         memcpy(data + offset, resp_data, bytes_read);
 187         ret = bytes_read;
 188
 189 exit:
 190         iwl_free_resp(&cmd);
 191         return ret;
 192 }
 193
 194 static int iwl_nvm_write_section(struct iwl_mvm *mvm, u16 section,
 195                                  const u8 *data, u16 length)
 196 {
 197         int offset = 0;
 198
 199         /* copy data in chunks of 2k (and remainder if any) */
 200
 201         while (offset < length) {
 202                 int chunk_size, ret;
 203
 204                 chunk_size = min(IWL_NVM_DEFAULT_CHUNK_SIZE,
 205                                  length - offset);
 206
 207                 ret = iwl_nvm_write_chunk(mvm, section, offset,
 208                                           chunk_size, data + offset);
 209                 if (ret < 0)
 210                         return ret;
 211
 212                 offset += chunk_size;
 213         }
 214
 215         return 0;
 216 }
 217
 218 /*
 219  * Reads an NVM section completely.
 220  * NICs prior to 7000 family doesn't have a real NVM, but just read
 221  * section 0 which is the EEPROM. Because the EEPROM reading is unlimited
 222  * by uCode, we need to manually check in this case that we don't
 223  * overflow and try to read more than the EEPROM size.
 224  * For 7000 family NICs, we supply the maximal size we can read, and
 225  * the uCode fills the response with as much data as we can,
 226  * without overflowing, so no check is needed.
 227  */
 228 static int iwl_nvm_read_section(struct iwl_mvm *mvm, u16 section,
 229                                 u8 *data, u32 size_read)
 230 {
 231         u16 length, offset = 0;
 232         int ret;
 233
 234         /* Set nvm section read length */
 235         length = IWL_NVM_DEFAULT_CHUNK_SIZE;
 236
 237         ret = length;
 238
 239         /* Read the NVM until exhausted (reading less than requested) */
 240         while (ret == length) {
 241                 /* Check no memory assumptions fail and cause an overflow */
 242                 if ((size_read + offset + length) >
 243                     mvm->cfg->base_params->eeprom_size) {
 244                         IWL_ERR(mvm, "EEPROM size is too small for NVM\n");
 245                         return -ENOBUFS;
 246                 }
 247
 248                 ret = iwl_nvm_read_chunk(mvm, section, offset, length, data);
 249                 if (ret < 0) {
 250                         IWL_DEBUG_EEPROM(mvm->trans->dev,
 251                                          "Cannot read NVM from section %d offset %d, length %d\n",
 252                                          section, offset, length);
 253                         return ret;
 254                 }
 255                 offset += ret;
 256         }
 257
 258         IWL_DEBUG_EEPROM(mvm->trans->dev,
 259                          "NVM section %d read completed\n", section);
 260         return offset;
 261 }
 262
 263 static struct iwl_nvm_data *
 264 iwl_parse_nvm_sections(struct iwl_mvm *mvm)
 265 {
 266         struct iwl_nvm_section *sections = mvm->nvm_sections;
 267         const __le16 *hw, *sw, *calib, *regulatory, *mac_override, *phy_sku;
 268         bool is_family_8000_a_step = false, lar_enabled;
 269         u32 mac_addr0, mac_addr1;
 270
 271         /* Checking for required sections */
 272         if (mvm->trans->cfg->device_family != IWL_DEVICE_FAMILY_8000) {
 273                 if (!mvm->nvm_sections[NVM_SECTION_TYPE_SW].data ||
 274                     !mvm->nvm_sections[mvm->cfg->nvm_hw_section_num].data) {
 275                         IWL_ERR(mvm, "Can't parse empty OTP/NVM sections\n");
 276                         return NULL;
 277                 }
 278         } else {
 279                 /* SW and REGULATORY sections are mandatory */
 280                 if (!mvm->nvm_sections[NVM_SECTION_TYPE_SW].data ||
 281                     !mvm->nvm_sections[NVM_SECTION_TYPE_REGULATORY].data) {
 282                         IWL_ERR(mvm,
 283                                 "Can't parse empty family 8000 OTP/NVM sections\n");
 284                         return NULL;
 285                 }
 286                 /* MAC_OVERRIDE or at least HW section must exist */
 287                 if (!mvm->nvm_sections[mvm->cfg->nvm_hw_section_num].data &&
 288                     !mvm->nvm_sections[NVM_SECTION_TYPE_MAC_OVERRIDE].data) {
 289                         IWL_ERR(mvm,
 290                                 "Can't parse mac_address, empty sections\n");
 291                         return NULL;
 292                 }
 293
 294                 if (CSR_HW_REV_STEP(mvm->trans->hw_rev) == SILICON_A_STEP)
 295                         is_family_8000_a_step = true;
 296
 297                 /* PHY_SKU section is mandatory in B0 */
 298                 if (!is_family_8000_a_step &&
 299                     !mvm->nvm_sections[NVM_SECTION_TYPE_PHY_SKU].data) {
 300                         IWL_ERR(mvm,
 301                                 "Can't parse phy_sku in B0, empty sections\n");
 302                         return NULL;
 303                 }
 304         }
 305
 306         if (WARN_ON(!mvm->cfg))
 307                 return NULL;
 308
 309         /* read the mac address from WFMP registers */
 310         mac_addr0 = iwl_trans_read_prph(mvm->trans, WFMP_MAC_ADDR_0);
 311         mac_addr1 = iwl_trans_read_prph(mvm->trans, WFMP_MAC_ADDR_1);
 312
 313         hw = (const __le16 *)sections[mvm->cfg->nvm_hw_section_num].data;
 314         sw = (const __le16 *)sections[NVM_SECTION_TYPE_SW].data;
 315         calib = (const __le16 *)sections[NVM_SECTION_TYPE_CALIBRATION].data;
 316         regulatory = (const __le16 *)sections[NVM_SECTION_TYPE_REGULATORY].data;
 317         mac_override =
 318                 (const __le16 *)sections[NVM_SECTION_TYPE_MAC_OVERRIDE].data;
 319         phy_sku = (const __le16 *)sections[NVM_SECTION_TYPE_PHY_SKU].data;
 320
 321         lar_enabled = !iwlwifi_mod_params.lar_disable &&
 322                       (mvm->fw->ucode_capa.capa[0] &
 323                        IWL_UCODE_TLV_CAPA_LAR_SUPPORT);
 324
 325         return iwl_parse_nvm_data(mvm->trans->dev, mvm->cfg, hw, sw, calib,
 326                                   regulatory, mac_override, phy_sku,
 327                                   mvm->fw->valid_tx_ant, mvm->fw->valid_rx_ant,
 328                                   lar_enabled, is_family_8000_a_step,
 329                                   mac_addr0, mac_addr1);
 330 }
 331
 332 #define MAX_NVM_FILE_LEN        16384
 333
 334 /*
 335  * Reads external NVM from a file into mvm->nvm_sections
 336  *
 337  * HOW TO CREATE THE NVM FILE FORMAT:
 338  * ------------------------------
 339  * 1. create hex file, format:
 340  *      3800 -> header
 341  *      0000 -> header
 342  *      5a40 -> data
 343  *
 344  *   rev - 6 bit (word1)
 345  *   len - 10 bit (word1)
 346  *   id - 4 bit (word2)
 347  *   rsv - 12 bit (word2)
 348  *
 349  * 2. flip 8bits with 8 bits per line to get the right NVM file format
 350  *
 351  * 3. create binary file from the hex file
 352  *
 353  * 4. save as "iNVM_xxx.bin" under /lib/firmware
 354  */
 355 static int iwl_mvm_read_external_nvm(struct iwl_mvm *mvm)
 356 {
 357         int ret, section_size;
 358         u16 section_id;
 359         const struct firmware *fw_entry;
 360         const struct {
 361                 __le16 word1;
 362                 __le16 word2;
 363                 u8 data[];
 364         } *file_sec;
 365         const u8 *eof, *temp;
 366         int max_section_size;
 367         const __le32 *dword_buff;
 368
 369 #define NVM_WORD1_LEN(x) (8 * (x & 0x03FF))
 370 #define NVM_WORD2_ID(x) (x >> 12)
 371 #define NVM_WORD2_LEN_FAMILY_8000(x) (2 * ((x & 0xFF) << 8 | x >> 8))
 372 #define NVM_WORD1_ID_FAMILY_8000(x) (x >> 4)
 373 #define NVM_HEADER_0    (0x2A504C54)
 374 #define NVM_HEADER_1    (0x4E564D2A)
 375 #define NVM_HEADER_SIZE (4 * sizeof(u32))
 376
 377         IWL_DEBUG_EEPROM(mvm->trans->dev, "Read from external NVM\n");
 378
 379         /* Maximal size depends on HW family and step */
 380         if (mvm->trans->cfg->device_family != IWL_DEVICE_FAMILY_8000)
 381                 max_section_size = IWL_MAX_NVM_SECTION_SIZE;
 382         else if (CSR_HW_REV_STEP(mvm->trans->hw_rev) == SILICON_A_STEP)
 383                 max_section_size = IWL_MAX_NVM_8000A_SECTION_SIZE;
 384         else /* Family 8000 B-step or C-step */
 385                 max_section_size = IWL_MAX_NVM_8000B_SECTION_SIZE;
 386
 387         /*
 388          * Obtain NVM image via request_firmware. Since we already used
 389          * request_firmware_nowait() for the firmware binary load and only
 390          * get here after that we assume the NVM request can be satisfied
 391          * synchronously.
 392          */
 393         ret = request_firmware(&fw_entry, mvm->nvm_file_name,
 394                                mvm->trans->dev);
 395         if (ret) {
 396                 IWL_ERR(mvm, "ERROR: %s isn't available %d\n",
 397                         mvm->nvm_file_name, ret);
 398                 return ret;
 399         }
 400
 401         IWL_INFO(mvm, "Loaded NVM file %s (%zu bytes)\n",
 402                  mvm->nvm_file_name, fw_entry->size);
 403
 404         if (fw_entry->size > MAX_NVM_FILE_LEN) {
 405                 IWL_ERR(mvm, "NVM file too large\n");
 406                 ret = -EINVAL;
 407                 goto out;
 408         }
 409
 410         eof = fw_entry->data + fw_entry->size;
 411         dword_buff = (__le32 *)fw_entry->data;
 412
 413         /* some NVM file will contain a header.
 414          * The header is identified by 2 dwords header as follow:
 415          * dword[0] = 0x2A504C54
 416          * dword[1] = 0x4E564D2A
 417          *
 418          * This header must be skipped when providing the NVM data to the FW.
 419          */
 420         if (fw_entry->size > NVM_HEADER_SIZE &&
 421             dword_buff[0] == cpu_to_le32(NVM_HEADER_0) &&
 422             dword_buff[1] == cpu_to_le32(NVM_HEADER_1)) {
 423                 file_sec = (void *)(fw_entry->data + NVM_HEADER_SIZE);
 424                 IWL_INFO(mvm, "NVM Version %08X\n", le32_to_cpu(dword_buff[2]));
 425                 IWL_INFO(mvm, "NVM Manufacturing date %08X\n",
 426                          le32_to_cpu(dword_buff[3]));
 427         } else {
 428                 file_sec = (void *)fw_entry->data;
 429         }
 430
 431         while (true) {
 432                 if (file_sec->data > eof) {
 433                         IWL_ERR(mvm,
 434                                 "ERROR - NVM file too short for section header\n");
 435                         ret = -EINVAL;
 436                         break;
 437                 }
 438
 439                 /* check for EOF marker */
 440                 if (!file_sec->word1 && !file_sec->word2) {
 441                         ret = 0;
 442                         break;
 443                 }
 444
 445                 if (mvm->trans->cfg->device_family != IWL_DEVICE_FAMILY_8000) {
 446                         section_size =
 447                                 2 * NVM_WORD1_LEN(le16_to_cpu(file_sec->word1));
 448                         section_id = NVM_WORD2_ID(le16_to_cpu(file_sec->word2));
 449                 } else {
 450                         section_size = 2 * NVM_WORD2_LEN_FAMILY_8000(
 451                                                 le16_to_cpu(file_sec->word2));
 452                         section_id = NVM_WORD1_ID_FAMILY_8000(
 453                                                 le16_to_cpu(file_sec->word1));
 454                 }
 455
 456                 if (section_size > max_section_size) {
 457                         IWL_ERR(mvm, "ERROR - section too large (%d)\n",
 458                                 section_size);
 459                         ret = -EINVAL;
 460                         break;
 461                 }
 462
 463                 if (!section_size) {
 464                         IWL_ERR(mvm, "ERROR - section empty\n");
 465                         ret = -EINVAL;
 466                         break;
 467                 }
 468
 469                 if (file_sec->data + section_size > eof) {
 470                         IWL_ERR(mvm,
 471                                 "ERROR - NVM file too short for section (%d bytes)\n",
 472                                 section_size);
 473                         ret = -EINVAL;
 474                         break;
 475                 }
 476
 477                 if (WARN(section_id >= NVM_MAX_NUM_SECTIONS,
 478                          "Invalid NVM section ID %d\n", section_id)) {
 479                         ret = -EINVAL;
 480                         break;
 481                 }
 482
 483                 temp = kmemdup(file_sec->data, section_size, GFP_KERNEL);
 484                 if (!temp) {
 485                         ret = -ENOMEM;
 486                         break;
 487                 }
 488                 mvm->nvm_sections[section_id].data = temp;
 489                 mvm->nvm_sections[section_id].length = section_size;
 490
 491                 /* advance to the next section */
 492                 file_sec = (void *)(file_sec->data + section_size);
 493         }
 494 out:
 495         release_firmware(fw_entry);
 496         return ret;
 497 }
 498
 499 /* Loads the NVM data stored in mvm->nvm_sections into the NIC */
 500 int iwl_mvm_load_nvm_to_nic(struct iwl_mvm *mvm)
 501 {
 502         int i, ret = 0;
 503         struct iwl_nvm_section *sections = mvm->nvm_sections;
 504
 505         IWL_DEBUG_EEPROM(mvm->trans->dev, "'Write to NVM\n");
 506
 507         for (i = 0; i < ARRAY_SIZE(mvm->nvm_sections); i++) {
 508                 if (!mvm->nvm_sections[i].data || !mvm->nvm_sections[i].length)
 509                         continue;
 510                 ret = iwl_nvm_write_section(mvm, i, sections[i].data,
 511                                             sections[i].length);
 512                 if (ret < 0) {
 513                         IWL_ERR(mvm, "iwl_mvm_send_cmd failed: %d\n", ret);
 514                         break;
 515                 }
 516         }
 517         return ret;
 518 }
 519
 520 int iwl_nvm_init(struct iwl_mvm *mvm, bool read_nvm_from_nic)
 521 {
 522         int ret, section;
 523         u32 size_read = 0;
 524         u8 *nvm_buffer, *temp;
 525
 526         if (WARN_ON_ONCE(mvm->cfg->nvm_hw_section_num >= NVM_MAX_NUM_SECTIONS))
 527                 return -EINVAL;
 528
 529         /* load NVM values from nic */
 530         if (read_nvm_from_nic) {
 531                 /* Read From FW NVM */
 532                 IWL_DEBUG_EEPROM(mvm->trans->dev, "Read from NVM\n");
 533
 534                 nvm_buffer = kmalloc(mvm->cfg->base_params->eeprom_size,
 535                                      GFP_KERNEL);
 536                 if (!nvm_buffer)
 537                         return -ENOMEM;
 538                 for (section = 0; section < NVM_MAX_NUM_SECTIONS; section++) {
 539                         /* we override the constness for initial read */
 540                         ret = iwl_nvm_read_section(mvm, section, nvm_buffer,
 541                                                    size_read);
 542                         if (ret < 0)
 543                                 continue;
 544                         size_read += ret;
 545                         temp = kmemdup(nvm_buffer, ret, GFP_KERNEL);
 546                         if (!temp) {
 547                                 ret = -ENOMEM;
 548                                 break;
 549                         }
 550                         mvm->nvm_sections[section].data = temp;
 551                         mvm->nvm_sections[section].length = ret;
 552
 553 #ifdef CONFIG_IWLWIFI_DEBUGFS
 554                         switch (section) {
 555                         case NVM_SECTION_TYPE_SW:
 556                                 mvm->nvm_sw_blob.data = temp;
 557                                 mvm->nvm_sw_blob.size  = ret;
 558                                 break;
 559                         case NVM_SECTION_TYPE_CALIBRATION:
 560                                 mvm->nvm_calib_blob.data = temp;
 561                                 mvm->nvm_calib_blob.size  = ret;
 562                                 break;
 563                         case NVM_SECTION_TYPE_PRODUCTION:
 564                                 mvm->nvm_prod_blob.data = temp;
 565                                 mvm->nvm_prod_blob.size  = ret;
 566                                 break;
 567                         default:
 568                                 if (section == mvm->cfg->nvm_hw_section_num) {
 569                                         mvm->nvm_hw_blob.data = temp;
 570                                         mvm->nvm_hw_blob.size = ret;
 571                                         break;
 572                                 }
 573                         }
 574 #endif
 575                 }
 576                 if (!size_read)
 577                         IWL_ERR(mvm, "OTP is blank\n");
 578                 kfree(nvm_buffer);
 579         }
 580
 581         /* load external NVM if configured */
 582         if (mvm->nvm_file_name) {
 583                 /* move to External NVM flow */
 584                 ret = iwl_mvm_read_external_nvm(mvm);
 585                 if (ret)
 586                         return ret;
 587         }
 588
 589         /* parse the relevant nvm sections */
 590         mvm->nvm_data = iwl_parse_nvm_sections(mvm);
 591         if (!mvm->nvm_data)
 592                 return -ENODATA;
 593         IWL_DEBUG_EEPROM(mvm->trans->dev, "nvm version = %x\n",
 594                          mvm->nvm_data->nvm_version);
 595
 596         return 0;
 597 }
 598
 599 struct iwl_mcc_update_resp *
 600 iwl_mvm_update_mcc(struct iwl_mvm *mvm, const char *alpha2,
 601                    enum iwl_mcc_source src_id)
 602 {
 603         struct iwl_mcc_update_cmd mcc_update_cmd = {
 604                 .mcc = cpu_to_le16(alpha2[0] << 8 | alpha2[1]),
 605                 .source_id = (u8)src_id,
 606         };
 607         struct iwl_mcc_update_resp *mcc_resp, *resp_cp = NULL;
 608         struct iwl_rx_packet *pkt;
 609         struct iwl_host_cmd cmd = {
 610                 .id = MCC_UPDATE_CMD,
 611                 .flags = CMD_WANT_SKB,
 612                 .data = { &mcc_update_cmd },
 613         };
 614
 615         int ret;
 616         u32 status;
 617         int resp_len, n_channels;
 618         u16 mcc;
 619
 620         if (WARN_ON_ONCE(!iwl_mvm_is_lar_supported(mvm)))
 621                 return ERR_PTR(-EOPNOTSUPP);
 622
 623         cmd.len[0] = sizeof(struct iwl_mcc_update_cmd);
 624
 625         IWL_DEBUG_LAR(mvm, "send MCC update to FW with '%c%c' src = %d\n",
 626                       alpha2[0], alpha2[1], src_id);
 627
 628         ret = iwl_mvm_send_cmd(mvm, &cmd);
 629         if (ret)
 630                 return ERR_PTR(ret);
 631
 632         pkt = cmd.resp_pkt;
 633         if (pkt->hdr.flags & IWL_CMD_FAILED_MSK) {
 634                 IWL_ERR(mvm, "Bad return from MCC_UPDATE_COMMAND (0x%08X)\n",
 635                         pkt->hdr.flags);
 636                 ret = -EIO;
 637                 goto exit;
 638         }
 639
 640         /* Extract MCC response */
 641         mcc_resp = (void *)pkt->data;
 642         status = le32_to_cpu(mcc_resp->status);
 643
 644         mcc = le16_to_cpu(mcc_resp->mcc);
 645
 646         /* W/A for a FW/NVM issue - returns 0x00 for the world domain */
 647         if (mcc == 0) {
 648                 mcc = 0x3030;  /* "00" - world */
 649                 mcc_resp->mcc = cpu_to_le16(mcc);
 650         }
 651
 652         n_channels =  __le32_to_cpu(mcc_resp->n_channels);
 653         IWL_DEBUG_LAR(mvm,
 654                       "MCC response status: 0x%x. new MCC: 0x%x ('%c%c') change: %d n_chans: %d\n",
 655                       status, mcc, mcc >> 8, mcc & 0xff,
 656                       !!(status == MCC_RESP_SAME_CHAN_PROFILE), n_channels);
 657
 658         resp_len = sizeof(*mcc_resp) + n_channels * sizeof(__le32);
 659         resp_cp = kmemdup(mcc_resp, resp_len, GFP_KERNEL);
 660         if (!resp_cp) {
 661                 ret = -ENOMEM;
 662                 goto exit;
 663         }
 664
 665         ret = 0;
 666 exit:
 667         iwl_free_resp(&cmd);
 668         if (ret)
 669                 return ERR_PTR(ret);
 670         return resp_cp;
 671 }
 672
 673 int iwl_mvm_init_mcc(struct iwl_mvm *mvm)
 674 {
 675         bool tlv_lar;
 676         bool nvm_lar;
 677         int retval;
 678         struct ieee80211_regdomain *regd;
 679
 680         if (mvm->cfg->device_family == IWL_DEVICE_FAMILY_8000) {
 681                 tlv_lar = mvm->fw->ucode_capa.capa[0] &
 682                         IWL_UCODE_TLV_CAPA_LAR_SUPPORT;
 683                 nvm_lar = mvm->nvm_data->lar_enabled;
 684                 if (tlv_lar != nvm_lar)
 685                         IWL_INFO(mvm,
 686                                  "Conflict between TLV & NVM regarding enabling LAR (TLV = %s NVM =%s)\n",
 687                                  tlv_lar ? "enabled" : "disabled",
 688                                  nvm_lar ? "enabled" : "disabled");
 689         }
 690
 691         if (!iwl_mvm_is_lar_supported(mvm))
 692                 return 0;
 693
 694         /*
 695          * During HW restart, only replay the last set MCC to FW. Otherwise,
 696          * queue an update to cfg80211 to retrieve the default alpha2 from FW.
 697          */
 698         if (test_bit(IWL_MVM_STATUS_IN_HW_RESTART, &mvm->status)) {
 699                 /* This should only be called during vif up and hold RTNL */
 700                 return iwl_mvm_init_fw_regd(mvm);
 701         }
 702
 703         /*
 704          * Driver regulatory hint for initial update, this also informs the
 705          * firmware we support wifi location updates.
 706          * Disallow scans that might crash the FW while the LAR regdomain
 707          * is not set.
 708          */
 709         mvm->lar_regdom_set = false;
 710
 711         regd = iwl_mvm_get_current_regdomain(mvm);
 712         if (IS_ERR_OR_NULL(regd))
 713                 return -EIO;
 714
 715         retval = regulatory_set_wiphy_regd_sync_rtnl(mvm->hw->wiphy, regd);
 716         kfree(regd);
 717         return retval;
 718 }
 719
 720 int iwl_mvm_rx_chub_update_mcc(struct iwl_mvm *mvm,
 721                                struct iwl_rx_cmd_buffer *rxb,
 722                                struct iwl_device_cmd *cmd)
 723 {
 724         struct iwl_rx_packet *pkt = rxb_addr(rxb);
 725         struct iwl_mcc_chub_notif *notif = (void *)pkt->data;
 726         enum iwl_mcc_source src;
 727         char mcc[3];
 728         struct ieee80211_regdomain *regd;
 729
 730         lockdep_assert_held(&mvm->mutex);
 731
 732         if (WARN_ON_ONCE(!iwl_mvm_is_lar_supported(mvm)))
 733                 return 0;
 734
 735         mcc[0] = notif->mcc >> 8;
 736         mcc[1] = notif->mcc & 0xff;
 737         mcc[2] = '\0';
 738         src = notif->source_id;
 739
 740         IWL_DEBUG_LAR(mvm,
 741                       "RX: received chub update mcc cmd (mcc '%s' src %d)\n",
 742                       mcc, src);
 743         regd = iwl_mvm_get_regdomain(mvm->hw->wiphy, mcc, src);
 744         if (IS_ERR_OR_NULL(regd))
 745                 return 0;
 746
 747         regulatory_set_wiphy_regd(mvm->hw->wiphy, regd);
 748         kfree(regd);
 749
 750         return 0;
 751 }