drivers/net/wireless/mwifiex/cfg80211.c

   1 /*
   2  * Marvell Wireless LAN device driver: CFG80211
   3  *
   4  * Copyright (C) 2011, Marvell International Ltd.
   5  *
   6  * This software file (the "File") is distributed by Marvell International
   7  * Ltd. under the terms of the GNU General Public License Version 2, June 1991
   8  * (the "License").  You may use, redistribute and/or modify this File in
   9  * accordance with the terms and conditions of the License, a copy of which
  10  * is available by writing to the Free Software Foundation, Inc.,
  11  * 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA or on the
  12  * worldwide web at http://www.gnu.org/licenses/old-licenses/gpl-2.0.txt.
  13  *
  14  * THE FILE IS DISTRIBUTED AS-IS, WITHOUT WARRANTY OF ANY KIND, AND THE
  15  * IMPLIED WARRANTIES OF MERCHANTABILITY OR FITNESS FOR A PARTICULAR PURPOSE
  16  * ARE EXPRESSLY DISCLAIMED.  The License provides additional details about
  17  * this warranty disclaimer.
  18  */
  19
  20 #include "cfg80211.h"
  21 #include "main.h"
  22
  23 /*
  24  * This function maps the nl802.11 channel type into driver channel type.
  25  *
  26  * The mapping is as follows -
  27  *      NL80211_CHAN_NO_HT     -> IEEE80211_HT_PARAM_CHA_SEC_NONE
  28  *      NL80211_CHAN_HT20      -> IEEE80211_HT_PARAM_CHA_SEC_NONE
  29  *      NL80211_CHAN_HT40PLUS  -> IEEE80211_HT_PARAM_CHA_SEC_ABOVE
  30  *      NL80211_CHAN_HT40MINUS -> IEEE80211_HT_PARAM_CHA_SEC_BELOW
  31  *      Others                 -> IEEE80211_HT_PARAM_CHA_SEC_NONE
  32  */
  33 static u8
  34 mwifiex_cfg80211_channel_type_to_sec_chan_offset(enum nl80211_channel_type
  35                                                  channel_type)
  36 {
  37         switch (channel_type) {
  38         case NL80211_CHAN_NO_HT:
  39         case NL80211_CHAN_HT20:
  40                 return IEEE80211_HT_PARAM_CHA_SEC_NONE;
  41         case NL80211_CHAN_HT40PLUS:
  42                 return IEEE80211_HT_PARAM_CHA_SEC_ABOVE;
  43         case NL80211_CHAN_HT40MINUS:
  44                 return IEEE80211_HT_PARAM_CHA_SEC_BELOW;
  45         default:
  46                 return IEEE80211_HT_PARAM_CHA_SEC_NONE;
  47         }
  48 }
  49
  50 /*
  51  * This function checks whether WEP is set.
  52  */
  53 static int
  54 mwifiex_is_alg_wep(u32 cipher)
  55 {
  56         switch (cipher) {
  57         case WLAN_CIPHER_SUITE_WEP40:
  58         case WLAN_CIPHER_SUITE_WEP104:
  59                 return 1;
  60         default:
  61                 break;
  62         }
  63
  64         return 0;
  65 }
  66
  67 /*
  68  * This function retrieves the private structure from kernel wiphy structure.
  69  */
  70 static void *mwifiex_cfg80211_get_priv(struct wiphy *wiphy)
  71 {
  72         return (void *) (*(unsigned long *) wiphy_priv(wiphy));
  73 }
  74
  75 /*
  76  * CFG802.11 operation handler to delete a network key.
  77  */
  78 static int
  79 mwifiex_cfg80211_del_key(struct wiphy *wiphy, struct net_device *netdev,
  80                          u8 key_index, bool pairwise, const u8 *mac_addr)
  81 {
  82         struct mwifiex_private *priv = mwifiex_netdev_get_priv(netdev);
  83
  84         if (mwifiex_set_encode(priv, NULL, 0, key_index, 1)) {
  85                 wiphy_err(wiphy, "deleting the crypto keys\n");
  86                 return -EFAULT;
  87         }
  88
  89         wiphy_dbg(wiphy, "info: crypto keys deleted\n");
  90         return 0;
  91 }
  92
  93 /*
  94  * CFG802.11 operation handler to set Tx power.
  95  */
  96 static int
  97 mwifiex_cfg80211_set_tx_power(struct wiphy *wiphy,
  98                               enum nl80211_tx_power_setting type,
  99                               int mbm)
 100 {
 101         struct mwifiex_private *priv = mwifiex_cfg80211_get_priv(wiphy);
 102         struct mwifiex_power_cfg power_cfg;
 103         int dbm = MBM_TO_DBM(mbm);
 104
 105         if (type == NL80211_TX_POWER_FIXED) {
 106                 power_cfg.is_power_auto = 0;
 107                 power_cfg.power_level = dbm;
 108         } else {
 109                 power_cfg.is_power_auto = 1;
 110         }
 111
 112         return mwifiex_set_tx_power(priv, &power_cfg);
 113 }
 114
 115 /*
 116  * CFG802.11 operation handler to set Power Save option.
 117  *
 118  * The timeout value, if provided, is currently ignored.
 119  */
 120 static int
 121 mwifiex_cfg80211_set_power_mgmt(struct wiphy *wiphy,
 122                                 struct net_device *dev,
 123                                 bool enabled, int timeout)
 124 {
 125         struct mwifiex_private *priv = mwifiex_netdev_get_priv(dev);
 126         u32 ps_mode;
 127
 128         if (timeout)
 129                 wiphy_dbg(wiphy,
 130                           "info: ignore timeout value for IEEE Power Save\n");
 131
 132         ps_mode = enabled;
 133
 134         return mwifiex_drv_set_power(priv, &ps_mode);
 135 }
 136
 137 /*
 138  * CFG802.11 operation handler to set the default network key.
 139  */
 140 static int
 141 mwifiex_cfg80211_set_default_key(struct wiphy *wiphy, struct net_device *netdev,
 142                                  u8 key_index, bool unicast,
 143                                  bool multicast)
 144 {
 145         struct mwifiex_private *priv = mwifiex_netdev_get_priv(netdev);
 146
 147         /* Return if WEP key not configured */
 148         if (!priv->sec_info.wep_enabled)
 149                 return 0;
 150
 151         if (mwifiex_set_encode(priv, NULL, 0, key_index, 0)) {
 152                 wiphy_err(wiphy, "set default Tx key index\n");
 153                 return -EFAULT;
 154         }
 155
 156         return 0;
 157 }
 158
 159 /*
 160  * CFG802.11 operation handler to add a network key.
 161  */
 162 static int
 163 mwifiex_cfg80211_add_key(struct wiphy *wiphy, struct net_device *netdev,
 164                          u8 key_index, bool pairwise, const u8 *mac_addr,
 165                          struct key_params *params)
 166 {
 167         struct mwifiex_private *priv = mwifiex_netdev_get_priv(netdev);
 168
 169         if (mwifiex_set_encode(priv, params->key, params->key_len,
 170                                key_index, 0)) {
 171                 wiphy_err(wiphy, "crypto keys added\n");
 172                 return -EFAULT;
 173         }
 174
 175         return 0;
 176 }
 177
 178 /*
 179  * This function sends domain information to the firmware.
 180  *
 181  * The following information are passed to the firmware -
 182  *      - Country codes
 183  *      - Sub bands (first channel, number of channels, maximum Tx power)
 184  */
 185 static int mwifiex_send_domain_info_cmd_fw(struct wiphy *wiphy)
 186 {
 187         u8 no_of_triplet = 0;
 188         struct ieee80211_country_ie_triplet *t;
 189         u8 no_of_parsed_chan = 0;
 190         u8 first_chan = 0, next_chan = 0, max_pwr = 0;
 191         u8 i, flag = 0;
 192         enum ieee80211_band band;
 193         struct ieee80211_supported_band *sband;
 194         struct ieee80211_channel *ch;
 195         struct mwifiex_private *priv = mwifiex_cfg80211_get_priv(wiphy);
 196         struct mwifiex_adapter *adapter = priv->adapter;
 197         struct mwifiex_802_11d_domain_reg *domain_info = &adapter->domain_reg;
 198
 199         /* Set country code */
 200         domain_info->country_code[0] = priv->country_code[0];
 201         domain_info->country_code[1] = priv->country_code[1];
 202         domain_info->country_code[2] = ' ';
 203
 204         band = mwifiex_band_to_radio_type(adapter->config_bands);
 205         if (!wiphy->bands[band]) {
 206                 wiphy_err(wiphy, "11D: setting domain info in FW\n");
 207                 return -1;
 208         }
 209
 210         sband = wiphy->bands[band];
 211
 212         for (i = 0; i < sband->n_channels ; i++) {
 213                 ch = &sband->channels[i];
 214                 if (ch->flags & IEEE80211_CHAN_DISABLED)
 215                         continue;
 216
 217                 if (!flag) {
 218                         flag = 1;
 219                         first_chan = (u32) ch->hw_value;
 220                         next_chan = first_chan;
 221                         max_pwr = ch->max_power;
 222                         no_of_parsed_chan = 1;
 223                         continue;
 224                 }
 225
 226                 if (ch->hw_value == next_chan + 1 &&
 227                     ch->max_power == max_pwr) {
 228                         next_chan++;
 229                         no_of_parsed_chan++;
 230                 } else {
 231                         t = &domain_info->triplet[no_of_triplet];
 232                         t->chans.first_channel = first_chan;
 233                         t->chans.num_channels = no_of_parsed_chan;
 234                         t->chans.max_power = max_pwr;
 235                         no_of_triplet++;
 236                         first_chan = (u32) ch->hw_value;
 237                         next_chan = first_chan;
 238                         max_pwr = ch->max_power;
 239                         no_of_parsed_chan = 1;
 240                 }
 241         }
 242
 243         if (flag) {
 244                 t = &domain_info->triplet[no_of_triplet];
 245                 t->chans.first_channel = first_chan;
 246                 t->chans.num_channels = no_of_parsed_chan;
 247                 t->chans.max_power = max_pwr;
 248                 no_of_triplet++;
 249         }
 250
 251         domain_info->no_of_triplet = no_of_triplet;
 252
 253         if (mwifiex_send_cmd_async(priv, HostCmd_CMD_802_11D_DOMAIN_INFO,
 254                                    HostCmd_ACT_GEN_SET, 0, NULL)) {
 255                 wiphy_err(wiphy, "11D: setting domain info in FW\n");
 256                 return -1;
 257         }
 258
 259         return 0;
 260 }
 261
 262 /*
 263  * CFG802.11 regulatory domain callback function.
 264  *
 265  * This function is called when the regulatory domain is changed due to the
 266  * following reasons -
 267  *      - Set by driver
 268  *      - Set by system core
 269  *      - Set by user
 270  *      - Set bt Country IE
 271  */
 272 static int mwifiex_reg_notifier(struct wiphy *wiphy,
 273                                 struct regulatory_request *request)
 274 {
 275         struct mwifiex_private *priv = mwifiex_cfg80211_get_priv(wiphy);
 276
 277         wiphy_dbg(wiphy, "info: cfg80211 regulatory domain callback for domain"
 278                         " %c%c\n", request->alpha2[0], request->alpha2[1]);
 279
 280         memcpy(priv->country_code, request->alpha2, sizeof(request->alpha2));
 281
 282         switch (request->initiator) {
 283         case NL80211_REGDOM_SET_BY_DRIVER:
 284         case NL80211_REGDOM_SET_BY_CORE:
 285         case NL80211_REGDOM_SET_BY_USER:
 286                 break;
 287                 /* Todo: apply driver specific changes in channel flags based
 288                    on the request initiator if necessary. */
 289         case NL80211_REGDOM_SET_BY_COUNTRY_IE:
 290                 break;
 291         }
 292         mwifiex_send_domain_info_cmd_fw(wiphy);
 293
 294         return 0;
 295 }
 296
 297 /*
 298  * This function sets the RF channel.
 299  *
 300  * This function creates multiple IOCTL requests, populates them accordingly
 301  * and issues them to set the band/channel and frequency.
 302  */
 303 static int
 304 mwifiex_set_rf_channel(struct mwifiex_private *priv,
 305                        struct ieee80211_channel *chan,
 306                        enum nl80211_channel_type channel_type)
 307 {
 308         struct mwifiex_chan_freq_power cfp;
 309         u32 config_bands = 0;
 310         struct wiphy *wiphy = priv->wdev->wiphy;
 311         struct mwifiex_adapter *adapter = priv->adapter;
 312
 313         if (chan) {
 314                 /* Set appropriate bands */
 315                 if (chan->band == IEEE80211_BAND_2GHZ) {
 316                         if (channel_type == NL80211_CHAN_NO_HT)
 317                                 if (priv->adapter->config_bands == BAND_B ||
 318                                     priv->adapter->config_bands == BAND_G)
 319                                         config_bands =
 320                                                 priv->adapter->config_bands;
 321                                 else
 322                                         config_bands = BAND_B | BAND_G;
 323                         else
 324                                 config_bands = BAND_B | BAND_G | BAND_GN;
 325                 } else {
 326                         if (channel_type == NL80211_CHAN_NO_HT)
 327                                 config_bands = BAND_A;
 328                         else
 329                                 config_bands = BAND_AN | BAND_A;
 330                 }
 331
 332                 if (!((config_bands | adapter->fw_bands) &
 333                                                 ~adapter->fw_bands)) {
 334                         adapter->config_bands = config_bands;
 335                         if (priv->bss_mode == NL80211_IFTYPE_ADHOC) {
 336                                 adapter->adhoc_start_band = config_bands;
 337                                 if ((config_bands & BAND_GN) ||
 338                                     (config_bands & BAND_AN))
 339                                         adapter->adhoc_11n_enabled = true;
 340                                 else
 341                                         adapter->adhoc_11n_enabled = false;
 342                         }
 343                 }
 344                 adapter->sec_chan_offset =
 345                         mwifiex_cfg80211_channel_type_to_sec_chan_offset
 346                         (channel_type);
 347                 adapter->channel_type = channel_type;
 348
 349                 mwifiex_send_domain_info_cmd_fw(wiphy);
 350         }
 351
 352         wiphy_dbg(wiphy, "info: setting band %d, chan offset %d, mode %d\n",
 353                   config_bands, adapter->sec_chan_offset, priv->bss_mode);
 354         if (!chan)
 355                 return 0;
 356
 357         memset(&cfp, 0, sizeof(cfp));
 358         cfp.freq = chan->center_freq;
 359         cfp.channel = ieee80211_frequency_to_channel(chan->center_freq);
 360
 361         if (mwifiex_bss_set_channel(priv, &cfp))
 362                 return -EFAULT;
 363
 364         return mwifiex_drv_change_adhoc_chan(priv, cfp.channel);
 365 }
 366
 367 /*
 368  * CFG802.11 operation handler to set channel.
 369  *
 370  * This function can only be used when station is not connected.
 371  */
 372 static int
 373 mwifiex_cfg80211_set_channel(struct wiphy *wiphy, struct net_device *dev,
 374                              struct ieee80211_channel *chan,
 375                              enum nl80211_channel_type channel_type)
 376 {
 377         struct mwifiex_private *priv;
 378
 379         wiphy_info(wiphy, "entry: %s: channel_type=%d\n",
 380                    __func__, channel_type);
 381
 382         if (dev)
 383                 priv = mwifiex_netdev_get_priv(dev);
 384         else
 385                 priv = mwifiex_cfg80211_get_priv(wiphy);
 386
 387         if (priv->media_connected) {
 388                 wiphy_err(wiphy, "This setting is valid only when station "
 389                                 "is not connected\n");
 390                 return -EINVAL;
 391         }
 392
 393         return mwifiex_set_rf_channel(priv, chan, channel_type);
 394 }
 395
 396 /*
 397  * This function sets the fragmentation threshold.
 398  *
 399  * The fragmentation threshold value must lie between MWIFIEX_FRAG_MIN_VALUE
 400  * and MWIFIEX_FRAG_MAX_VALUE.
 401  */
 402 static int
 403 mwifiex_set_frag(struct mwifiex_private *priv, u32 frag_thr)
 404 {
 405         int ret;
 406
 407         if (frag_thr < MWIFIEX_FRAG_MIN_VALUE ||
 408             frag_thr > MWIFIEX_FRAG_MAX_VALUE)
 409                 return -EINVAL;
 410
 411         /* Send request to firmware */
 412         ret = mwifiex_send_cmd_sync(priv, HostCmd_CMD_802_11_SNMP_MIB,
 413                                     HostCmd_ACT_GEN_SET, FRAG_THRESH_I,
 414                                     &frag_thr);
 415
 416         return ret;
 417 }
 418
 419 /*
 420  * This function sets the RTS threshold.
 421
 422  * The rts value must lie between MWIFIEX_RTS_MIN_VALUE
 423  * and MWIFIEX_RTS_MAX_VALUE.
 424  */
 425 static int
 426 mwifiex_set_rts(struct mwifiex_private *priv, u32 rts_thr)
 427 {
 428         if (rts_thr < MWIFIEX_RTS_MIN_VALUE || rts_thr > MWIFIEX_RTS_MAX_VALUE)
 429                 rts_thr = MWIFIEX_RTS_MAX_VALUE;
 430
 431         return mwifiex_send_cmd_sync(priv, HostCmd_CMD_802_11_SNMP_MIB,
 432                                     HostCmd_ACT_GEN_SET, RTS_THRESH_I,
 433                                     &rts_thr);
 434 }
 435
 436 /*
 437  * CFG802.11 operation handler to set wiphy parameters.
 438  *
 439  * This function can be used to set the RTS threshold and the
 440  * Fragmentation threshold of the driver.
 441  */
 442 static int
 443 mwifiex_cfg80211_set_wiphy_params(struct wiphy *wiphy, u32 changed)
 444 {
 445         struct mwifiex_private *priv = mwifiex_cfg80211_get_priv(wiphy);
 446         int ret = 0;
 447
 448         if (changed & WIPHY_PARAM_RTS_THRESHOLD) {
 449                 ret = mwifiex_set_rts(priv, wiphy->rts_threshold);
 450                 if (ret)
 451                         return ret;
 452         }
 453
 454         if (changed & WIPHY_PARAM_FRAG_THRESHOLD)
 455                 ret = mwifiex_set_frag(priv, wiphy->frag_threshold);
 456
 457         return ret;
 458 }
 459
 460 /*
 461  * CFG802.11 operation handler to change interface type.
 462  */
 463 static int
 464 mwifiex_cfg80211_change_virtual_intf(struct wiphy *wiphy,
 465                                      struct net_device *dev,
 466                                      enum nl80211_iftype type, u32 *flags,
 467                                      struct vif_params *params)
 468 {
 469         int ret;
 470         struct mwifiex_private *priv = mwifiex_netdev_get_priv(dev);
 471
 472         if (priv->bss_mode == type) {
 473                 wiphy_warn(wiphy, "already set to required type\n");
 474                 return 0;
 475         }
 476
 477         priv->bss_mode = type;
 478
 479         switch (type) {
 480         case NL80211_IFTYPE_ADHOC:
 481                 dev->ieee80211_ptr->iftype = NL80211_IFTYPE_ADHOC;
 482                 wiphy_dbg(wiphy, "info: setting interface type to adhoc\n");
 483                 break;
 484         case NL80211_IFTYPE_STATION:
 485                 dev->ieee80211_ptr->iftype = NL80211_IFTYPE_STATION;
 486                 wiphy_dbg(wiphy, "info: setting interface type to managed\n");
 487                 break;
 488         case NL80211_IFTYPE_UNSPECIFIED:
 489                 dev->ieee80211_ptr->iftype = NL80211_IFTYPE_STATION;
 490                 wiphy_dbg(wiphy, "info: setting interface type to auto\n");
 491                 return 0;
 492         default:
 493                 wiphy_err(wiphy, "unknown interface type: %d\n", type);
 494                 return -EINVAL;
 495         }
 496
 497         mwifiex_deauthenticate(priv, NULL);
 498
 499         priv->sec_info.authentication_mode = NL80211_AUTHTYPE_OPEN_SYSTEM;
 500
 501         ret = mwifiex_send_cmd_sync(priv, HostCmd_CMD_SET_BSS_MODE,
 502                                     HostCmd_ACT_GEN_SET, 0, NULL);
 503
 504         return ret;
 505 }
 506
 507 /*
 508  * This function dumps the station information on a buffer.
 509  *
 510  * The following information are shown -
 511  *      - Total bytes transmitted
 512  *      - Total bytes received
 513  *      - Total packets transmitted
 514  *      - Total packets received
 515  *      - Signal quality level
 516  *      - Transmission rate
 517  */
 518 static int
 519 mwifiex_dump_station_info(struct mwifiex_private *priv,
 520                           struct station_info *sinfo)
 521 {
 522         struct mwifiex_rate_cfg rate;
 523
 524         sinfo->filled = STATION_INFO_RX_BYTES | STATION_INFO_TX_BYTES |
 525                         STATION_INFO_RX_PACKETS | STATION_INFO_TX_PACKETS |
 526                         STATION_INFO_TX_BITRATE |
 527                         STATION_INFO_SIGNAL | STATION_INFO_SIGNAL_AVG;
 528
 529         /* Get signal information from the firmware */
 530         if (mwifiex_send_cmd_sync(priv, HostCmd_CMD_RSSI_INFO,
 531                                   HostCmd_ACT_GEN_GET, 0, NULL)) {
 532                 dev_err(priv->adapter->dev, "failed to get signal information\n");
 533                 return -EFAULT;
 534         }
 535
 536         if (mwifiex_drv_get_data_rate(priv, &rate)) {
 537                 dev_err(priv->adapter->dev, "getting data rate\n");
 538                 return -EFAULT;
 539         }
 540
 541         /* Get DTIM period information from firmware */
 542         mwifiex_send_cmd_sync(priv, HostCmd_CMD_802_11_SNMP_MIB,
 543                               HostCmd_ACT_GEN_GET, DTIM_PERIOD_I,
 544                               &priv->dtim_period);
 545
 546         /*
 547          * Bit 0 in tx_htinfo indicates that current Tx rate is 11n rate. Valid
 548          * MCS index values for us are 0 to 7.
 549          */
 550         if ((priv->tx_htinfo & BIT(0)) && (priv->tx_rate < 8)) {
 551                 sinfo->txrate.mcs = priv->tx_rate;
 552                 sinfo->txrate.flags |= RATE_INFO_FLAGS_MCS;
 553                 /* 40MHz rate */
 554                 if (priv->tx_htinfo & BIT(1))
 555                         sinfo->txrate.flags |= RATE_INFO_FLAGS_40_MHZ_WIDTH;
 556                 /* SGI enabled */
 557                 if (priv->tx_htinfo & BIT(2))
 558                         sinfo->txrate.flags |= RATE_INFO_FLAGS_SHORT_GI;
 559         }
 560
 561         sinfo->signal_avg = priv->bcn_rssi_avg;
 562         sinfo->rx_bytes = priv->stats.rx_bytes;
 563         sinfo->tx_bytes = priv->stats.tx_bytes;
 564         sinfo->rx_packets = priv->stats.rx_packets;
 565         sinfo->tx_packets = priv->stats.tx_packets;
 566         sinfo->signal = priv->bcn_rssi_avg;
 567         /* bit rate is in 500 kb/s units. Convert it to 100kb/s units */
 568         sinfo->txrate.legacy = rate.rate * 5;
 569
 570         if (priv->bss_mode == NL80211_IFTYPE_STATION) {
 571                 sinfo->filled |= STATION_INFO_BSS_PARAM;
 572                 sinfo->bss_param.flags = 0;
 573                 if (priv->curr_bss_params.bss_descriptor.cap_info_bitmap &
 574                                                 WLAN_CAPABILITY_SHORT_PREAMBLE)
 575                         sinfo->bss_param.flags |=
 576                                         BSS_PARAM_FLAGS_SHORT_PREAMBLE;
 577                 if (priv->curr_bss_params.bss_descriptor.cap_info_bitmap &
 578                                                 WLAN_CAPABILITY_SHORT_SLOT_TIME)
 579                         sinfo->bss_param.flags |=
 580                                         BSS_PARAM_FLAGS_SHORT_SLOT_TIME;
 581                 sinfo->bss_param.dtim_period = priv->dtim_period;
 582                 sinfo->bss_param.beacon_interval =
 583                         priv->curr_bss_params.bss_descriptor.beacon_period;
 584         }
 585
 586         return 0;
 587 }
 588
 589 /*
 590  * CFG802.11 operation handler to get station information.
 591  *
 592  * This function only works in connected mode, and dumps the
 593  * requested station information, if available.
 594  */
 595 static int
 596 mwifiex_cfg80211_get_station(struct wiphy *wiphy, struct net_device *dev,
 597                              u8 *mac, struct station_info *sinfo)
 598 {
 599         struct mwifiex_private *priv = mwifiex_netdev_get_priv(dev);
 600
 601         if (!priv->media_connected)
 602                 return -ENOENT;
 603         if (memcmp(mac, priv->cfg_bssid, ETH_ALEN))
 604                 return -ENOENT;
 605
 606         return mwifiex_dump_station_info(priv, sinfo);
 607 }
 608
 609 /*
 610  * CFG802.11 operation handler to dump station information.
 611  */
 612 static int
 613 mwifiex_cfg80211_dump_station(struct wiphy *wiphy, struct net_device *dev,
 614                               int idx, u8 *mac, struct station_info *sinfo)
 615 {
 616         struct mwifiex_private *priv = mwifiex_netdev_get_priv(dev);
 617
 618         if (!priv->media_connected || idx)
 619                 return -ENOENT;
 620
 621         memcpy(mac, priv->cfg_bssid, ETH_ALEN);
 622
 623         return mwifiex_dump_station_info(priv, sinfo);
 624 }
 625
 626 /* Supported rates to be advertised to the cfg80211 */
 627
 628 static struct ieee80211_rate mwifiex_rates[] = {
 629         {.bitrate = 10, .hw_value = 2, },
 630         {.bitrate = 20, .hw_value = 4, },
 631         {.bitrate = 55, .hw_value = 11, },
 632         {.bitrate = 110, .hw_value = 22, },
 633         {.bitrate = 60, .hw_value = 12, },
 634         {.bitrate = 90, .hw_value = 18, },
 635         {.bitrate = 120, .hw_value = 24, },
 636         {.bitrate = 180, .hw_value = 36, },
 637         {.bitrate = 240, .hw_value = 48, },
 638         {.bitrate = 360, .hw_value = 72, },
 639         {.bitrate = 480, .hw_value = 96, },
 640         {.bitrate = 540, .hw_value = 108, },
 641 };
 642
 643 /* Channel definitions to be advertised to cfg80211 */
 644
 645 static struct ieee80211_channel mwifiex_channels_2ghz[] = {
 646         {.center_freq = 2412, .hw_value = 1, },
 647         {.center_freq = 2417, .hw_value = 2, },
 648         {.center_freq = 2422, .hw_value = 3, },
 649         {.center_freq = 2427, .hw_value = 4, },
 650         {.center_freq = 2432, .hw_value = 5, },
 651         {.center_freq = 2437, .hw_value = 6, },
 652         {.center_freq = 2442, .hw_value = 7, },
 653         {.center_freq = 2447, .hw_value = 8, },
 654         {.center_freq = 2452, .hw_value = 9, },
 655         {.center_freq = 2457, .hw_value = 10, },
 656         {.center_freq = 2462, .hw_value = 11, },
 657         {.center_freq = 2467, .hw_value = 12, },
 658         {.center_freq = 2472, .hw_value = 13, },
 659         {.center_freq = 2484, .hw_value = 14, },
 660 };
 661
 662 static struct ieee80211_supported_band mwifiex_band_2ghz = {
 663         .channels = mwifiex_channels_2ghz,
 664         .n_channels = ARRAY_SIZE(mwifiex_channels_2ghz),
 665         .bitrates = mwifiex_rates,
 666         .n_bitrates = ARRAY_SIZE(mwifiex_rates),
 667 };
 668
 669 static struct ieee80211_channel mwifiex_channels_5ghz[] = {
 670         {.center_freq = 5040, .hw_value = 8, },
 671         {.center_freq = 5060, .hw_value = 12, },
 672         {.center_freq = 5080, .hw_value = 16, },
 673         {.center_freq = 5170, .hw_value = 34, },
 674         {.center_freq = 5190, .hw_value = 38, },
 675         {.center_freq = 5210, .hw_value = 42, },
 676         {.center_freq = 5230, .hw_value = 46, },
 677         {.center_freq = 5180, .hw_value = 36, },
 678         {.center_freq = 5200, .hw_value = 40, },
 679         {.center_freq = 5220, .hw_value = 44, },
 680         {.center_freq = 5240, .hw_value = 48, },
 681         {.center_freq = 5260, .hw_value = 52, },
 682         {.center_freq = 5280, .hw_value = 56, },
 683         {.center_freq = 5300, .hw_value = 60, },
 684         {.center_freq = 5320, .hw_value = 64, },
 685         {.center_freq = 5500, .hw_value = 100, },
 686         {.center_freq = 5520, .hw_value = 104, },
 687         {.center_freq = 5540, .hw_value = 108, },
 688         {.center_freq = 5560, .hw_value = 112, },
 689         {.center_freq = 5580, .hw_value = 116, },
 690         {.center_freq = 5600, .hw_value = 120, },
 691         {.center_freq = 5620, .hw_value = 124, },
 692         {.center_freq = 5640, .hw_value = 128, },
 693         {.center_freq = 5660, .hw_value = 132, },
 694         {.center_freq = 5680, .hw_value = 136, },
 695         {.center_freq = 5700, .hw_value = 140, },
 696         {.center_freq = 5745, .hw_value = 149, },
 697         {.center_freq = 5765, .hw_value = 153, },
 698         {.center_freq = 5785, .hw_value = 157, },
 699         {.center_freq = 5805, .hw_value = 161, },
 700         {.center_freq = 5825, .hw_value = 165, },
 701 };
 702
 703 static struct ieee80211_supported_band mwifiex_band_5ghz = {
 704         .channels = mwifiex_channels_5ghz,
 705         .n_channels = ARRAY_SIZE(mwifiex_channels_5ghz),
 706         .bitrates = mwifiex_rates + 4,
 707         .n_bitrates = ARRAY_SIZE(mwifiex_rates) - 4,
 708 };
 709
 710
 711 /* Supported crypto cipher suits to be advertised to cfg80211 */
 712
 713 static const u32 mwifiex_cipher_suites[] = {
 714         WLAN_CIPHER_SUITE_WEP40,
 715         WLAN_CIPHER_SUITE_WEP104,
 716         WLAN_CIPHER_SUITE_TKIP,
 717         WLAN_CIPHER_SUITE_CCMP,
 718 };
 719
 720 /*
 721  * CFG802.11 operation handler for setting bit rates.
 722  *
 723  * Function selects legacy bang B/G/BG from corresponding bitrates selection.
 724  * Currently only 2.4GHz band is supported.
 725  */
 726 static int mwifiex_cfg80211_set_bitrate_mask(struct wiphy *wiphy,
 727                                 struct net_device *dev,
 728                                 const u8 *peer,
 729                                 const struct cfg80211_bitrate_mask *mask)
 730 {
 731         struct mwifiex_private *priv = mwifiex_netdev_get_priv(dev);
 732         int index = 0, mode = 0, i;
 733         struct mwifiex_adapter *adapter = priv->adapter;
 734
 735         /* Currently only 2.4GHz is supported */
 736         for (i = 0; i < mwifiex_band_2ghz.n_bitrates; i++) {
 737                 /*
 738                  * Rates below 6 Mbps in the table are CCK rates; 802.11b
 739                  * and from 6 they are OFDM; 802.11G
 740                  */
 741                 if (mwifiex_rates[i].bitrate == 60) {
 742                         index = 1 << i;
 743                         break;
 744                 }
 745         }
 746
 747         if (mask->control[IEEE80211_BAND_2GHZ].legacy < index) {
 748                 mode = BAND_B;
 749         } else {
 750                 mode = BAND_G;
 751                 if (mask->control[IEEE80211_BAND_2GHZ].legacy % index)
 752                         mode |=  BAND_B;
 753         }
 754
 755         if (!((mode | adapter->fw_bands) & ~adapter->fw_bands)) {
 756                 adapter->config_bands = mode;
 757                 if (priv->bss_mode == NL80211_IFTYPE_ADHOC) {
 758                         adapter->adhoc_start_band = mode;
 759                         adapter->adhoc_11n_enabled = false;
 760                 }
 761         }
 762         adapter->sec_chan_offset = IEEE80211_HT_PARAM_CHA_SEC_NONE;
 763         adapter->channel_type = NL80211_CHAN_NO_HT;
 764
 765         wiphy_debug(wiphy, "info: device configured in 802.11%s%s mode\n",
 766                     (mode & BAND_B) ? "b" : "", (mode & BAND_G) ? "g" : "");
 767
 768         return 0;
 769 }
 770
 771 /*
 772  * CFG802.11 operation handler for connection quality monitoring.
 773  *
 774  * This function subscribes/unsubscribes HIGH_RSSI and LOW_RSSI
 775  * events to FW.
 776  */
 777 static int mwifiex_cfg80211_set_cqm_rssi_config(struct wiphy *wiphy,
 778                                                 struct net_device *dev,
 779                                                 s32 rssi_thold, u32 rssi_hyst)
 780 {
 781         struct mwifiex_private *priv = mwifiex_netdev_get_priv(dev);
 782         struct mwifiex_ds_misc_subsc_evt subsc_evt;
 783
 784         wiphy_info(wiphy, "entry: %s: thold=%d hyst=%d\n",
 785                    __func__, rssi_thold, rssi_hyst);
 786
 787         priv->cqm_rssi_thold = rssi_thold;
 788         priv->cqm_rssi_hyst = rssi_hyst;
 789
 790         memset(&subsc_evt, 0x00, sizeof(struct mwifiex_ds_misc_subsc_evt));
 791         subsc_evt.events = BITMASK_BCN_RSSI_LOW | BITMASK_BCN_RSSI_HIGH;
 792
 793         /* Subscribe/unsubscribe low and high rssi events */
 794         if (rssi_thold && rssi_hyst) {
 795                 subsc_evt.action = HostCmd_ACT_BITWISE_SET;
 796                 subsc_evt.bcn_l_rssi_cfg.abs_value = abs(rssi_thold);
 797                 subsc_evt.bcn_h_rssi_cfg.abs_value = abs(rssi_thold);
 798                 subsc_evt.bcn_l_rssi_cfg.evt_freq = 1;
 799                 subsc_evt.bcn_h_rssi_cfg.evt_freq = 1;
 800                 return mwifiex_send_cmd_sync(priv,
 801                                              HostCmd_CMD_802_11_SUBSCRIBE_EVENT,
 802                                              0, 0, &subsc_evt);
 803         } else {
 804                 subsc_evt.action = HostCmd_ACT_BITWISE_CLR;
 805                 return mwifiex_send_cmd_sync(priv,
 806                                              HostCmd_CMD_802_11_SUBSCRIBE_EVENT,
 807                                              0, 0, &subsc_evt);
 808         }
 809
 810         return 0;
 811 }
 812
 813 /*
 814  * CFG802.11 operation handler for disconnection request.
 815  *
 816  * This function does not work when there is already a disconnection
 817  * procedure going on.
 818  */
 819 static int
 820 mwifiex_cfg80211_disconnect(struct wiphy *wiphy, struct net_device *dev,
 821                             u16 reason_code)
 822 {
 823         struct mwifiex_private *priv = mwifiex_netdev_get_priv(dev);
 824
 825         wiphy_info(wiphy, "entry: %s: reason_code=%d\n", __func__, reason_code);
 826
 827         if (mwifiex_deauthenticate(priv, NULL))
 828                 return -EFAULT;
 829
 830         wiphy_dbg(wiphy, "info: successfully disconnected from %pM:"
 831                 " reason code %d\n", priv->cfg_bssid, reason_code);
 832
 833         memset(priv->cfg_bssid, 0, ETH_ALEN);
 834
 835         return 0;
 836 }
 837
 838 /*
 839  * This function informs the CFG802.11 subsystem of a new IBSS.
 840  *
 841  * The following information are sent to the CFG802.11 subsystem
 842  * to register the new IBSS. If we do not register the new IBSS,
 843  * a kernel panic will result.
 844  *      - SSID
 845  *      - SSID length
 846  *      - BSSID
 847  *      - Channel
 848  */
 849 static int mwifiex_cfg80211_inform_ibss_bss(struct mwifiex_private *priv)
 850 {
 851         struct ieee80211_channel *chan;
 852         struct mwifiex_bss_info bss_info;
 853         struct cfg80211_bss *bss;
 854         int ie_len;
 855         u8 ie_buf[IEEE80211_MAX_SSID_LEN + sizeof(struct ieee_types_header)];
 856         enum ieee80211_band band;
 857
 858         if (mwifiex_get_bss_info(priv, &bss_info))
 859                 return -1;
 860
 861         ie_buf[0] = WLAN_EID_SSID;
 862         ie_buf[1] = bss_info.ssid.ssid_len;
 863
 864         memcpy(&ie_buf[sizeof(struct ieee_types_header)],
 865                &bss_info.ssid.ssid, bss_info.ssid.ssid_len);
 866         ie_len = ie_buf[1] + sizeof(struct ieee_types_header);
 867
 868         band = mwifiex_band_to_radio_type(priv->curr_bss_params.band);
 869         chan = __ieee80211_get_channel(priv->wdev->wiphy,
 870                         ieee80211_channel_to_frequency(bss_info.bss_chan,
 871                                                        band));
 872
 873         bss = cfg80211_inform_bss(priv->wdev->wiphy, chan,
 874                                   bss_info.bssid, 0, WLAN_CAPABILITY_IBSS,
 875                                   0, ie_buf, ie_len, 0, GFP_KERNEL);
 876         cfg80211_put_bss(bss);
 877         memcpy(priv->cfg_bssid, bss_info.bssid, ETH_ALEN);
 878
 879         return 0;
 880 }
 881
 882 /*
 883  * This function connects with a BSS.
 884  *
 885  * This function handles both Infra and Ad-Hoc modes. It also performs
 886  * validity checking on the provided parameters, disconnects from the
 887  * current BSS (if any), sets up the association/scan parameters,
 888  * including security settings, and performs specific SSID scan before
 889  * trying to connect.
 890  *
 891  * For Infra mode, the function returns failure if the specified SSID
 892  * is not found in scan table. However, for Ad-Hoc mode, it can create
 893  * the IBSS if it does not exist. On successful completion in either case,
 894  * the function notifies the CFG802.11 subsystem of the new BSS connection.
 895  */
 896 static int
 897 mwifiex_cfg80211_assoc(struct mwifiex_private *priv, size_t ssid_len, u8 *ssid,
 898                        u8 *bssid, int mode, struct ieee80211_channel *channel,
 899                        struct cfg80211_connect_params *sme, bool privacy)
 900 {
 901         struct cfg80211_ssid req_ssid;
 902         int ret, auth_type = 0;
 903         struct cfg80211_bss *bss = NULL;
 904         u8 is_scanning_required = 0;
 905
 906         memset(&req_ssid, 0, sizeof(struct cfg80211_ssid));
 907
 908         req_ssid.ssid_len = ssid_len;
 909         if (ssid_len > IEEE80211_MAX_SSID_LEN) {
 910                 dev_err(priv->adapter->dev, "invalid SSID - aborting\n");
 911                 return -EINVAL;
 912         }
 913
 914         memcpy(req_ssid.ssid, ssid, ssid_len);
 915         if (!req_ssid.ssid_len || req_ssid.ssid[0] < 0x20) {
 916                 dev_err(priv->adapter->dev, "invalid SSID - aborting\n");
 917                 return -EINVAL;
 918         }
 919
 920         /* disconnect before try to associate */
 921         mwifiex_deauthenticate(priv, NULL);
 922
 923         if (channel)
 924                 ret = mwifiex_set_rf_channel(priv, channel,
 925                                                 priv->adapter->channel_type);
 926
 927         /* As this is new association, clear locally stored
 928          * keys and security related flags */
 929         priv->sec_info.wpa_enabled = false;
 930         priv->sec_info.wpa2_enabled = false;
 931         priv->wep_key_curr_index = 0;
 932         priv->sec_info.encryption_mode = 0;
 933         priv->sec_info.is_authtype_auto = 0;
 934         ret = mwifiex_set_encode(priv, NULL, 0, 0, 1);
 935
 936         if (mode == NL80211_IFTYPE_ADHOC) {
 937                 /* "privacy" is set only for ad-hoc mode */
 938                 if (privacy) {
 939                         /*
 940                          * Keep WLAN_CIPHER_SUITE_WEP104 for now so that
 941                          * the firmware can find a matching network from the
 942                          * scan. The cfg80211 does not give us the encryption
 943                          * mode at this stage so just setting it to WEP here.
 944                          */
 945                         priv->sec_info.encryption_mode =
 946                                         WLAN_CIPHER_SUITE_WEP104;
 947                         priv->sec_info.authentication_mode =
 948                                         NL80211_AUTHTYPE_OPEN_SYSTEM;
 949                 }
 950
 951                 goto done;
 952         }
 953
 954         /* Now handle infra mode. "sme" is valid for infra mode only */
 955         if (sme->auth_type == NL80211_AUTHTYPE_AUTOMATIC) {
 956                 auth_type = NL80211_AUTHTYPE_OPEN_SYSTEM;
 957                 priv->sec_info.is_authtype_auto = 1;
 958         } else {
 959                 auth_type = sme->auth_type;
 960         }
 961
 962         if (sme->crypto.n_ciphers_pairwise) {
 963                 priv->sec_info.encryption_mode =
 964                                                 sme->crypto.ciphers_pairwise[0];
 965                 priv->sec_info.authentication_mode = auth_type;
 966         }
 967
 968         if (sme->crypto.cipher_group) {
 969                 priv->sec_info.encryption_mode = sme->crypto.cipher_group;
 970                 priv->sec_info.authentication_mode = auth_type;
 971         }
 972         if (sme->ie)
 973                 ret = mwifiex_set_gen_ie(priv, sme->ie, sme->ie_len);
 974
 975         if (sme->key) {
 976                 if (mwifiex_is_alg_wep(priv->sec_info.encryption_mode)) {
 977                         dev_dbg(priv->adapter->dev,
 978                                 "info: setting wep encryption"
 979                                 " with key len %d\n", sme->key_len);
 980                         priv->wep_key_curr_index = sme->key_idx;
 981                         ret = mwifiex_set_encode(priv, sme->key, sme->key_len,
 982                                                         sme->key_idx, 0);
 983                 }
 984         }
 985 done:
 986         /*
 987          * Scan entries are valid for some time (15 sec). So we can save one
 988          * active scan time if we just try cfg80211_get_bss first. If it fails
 989          * then request scan and cfg80211_get_bss() again for final output.
 990          */
 991         while (1) {
 992                 if (is_scanning_required) {
 993                         /* Do specific SSID scanning */
 994                         if (mwifiex_request_scan(priv, &req_ssid)) {
 995                                 dev_err(priv->adapter->dev, "scan error\n");
 996                                 return -EFAULT;
 997                         }
 998                 }
 999
1000                 /* Find the BSS we want using available scan results */
1001                 if (mode == NL80211_IFTYPE_ADHOC)
1002                         bss = cfg80211_get_bss(priv->wdev->wiphy, channel,
1003                                                bssid, ssid, ssid_len,
1004                                                WLAN_CAPABILITY_IBSS,
1005                                                WLAN_CAPABILITY_IBSS);
1006                 else
1007                         bss = cfg80211_get_bss(priv->wdev->wiphy, channel,
1008                                                bssid, ssid, ssid_len,
1009                                                WLAN_CAPABILITY_ESS,
1010                                                WLAN_CAPABILITY_ESS);
1011
1012                 if (!bss) {
1013                         if (is_scanning_required) {
1014                                 dev_warn(priv->adapter->dev,
1015                                          "assoc: requested bss not found in scan results\n");
1016                                 break;
1017                         }
1018                         is_scanning_required = 1;
1019                 } else {
1020                         dev_dbg(priv->adapter->dev,
1021                                 "info: trying to associate to '%s' bssid %pM\n",
1022                                 (char *) req_ssid.ssid, bss->bssid);
1023                         memcpy(&priv->cfg_bssid, bss->bssid, ETH_ALEN);
1024                         break;
1025                 }
1026         }
1027
1028         if (mwifiex_bss_start(priv, bss, &req_ssid))
1029                 return -EFAULT;
1030
1031         if (mode == NL80211_IFTYPE_ADHOC) {
1032                 /* Inform the BSS information to kernel, otherwise
1033                  * kernel will give a panic after successful assoc */
1034                 if (mwifiex_cfg80211_inform_ibss_bss(priv))
1035                         return -EFAULT;
1036         }
1037
1038         return ret;
1039 }
1040
1041 /*
1042  * CFG802.11 operation handler for association request.
1043  *
1044  * This function does not work when the current mode is set to Ad-Hoc, or
1045  * when there is already an association procedure going on. The given BSS
1046  * information is used to associate.
1047  */
1048 static int
1049 mwifiex_cfg80211_connect(struct wiphy *wiphy, struct net_device *dev,
1050                          struct cfg80211_connect_params *sme)
1051 {
1052         struct mwifiex_private *priv = mwifiex_netdev_get_priv(dev);
1053         int ret = 0;
1054
1055         wiphy_info(wiphy, "entry: %s\n", __func__);
1056
1057         if (priv->bss_mode == NL80211_IFTYPE_ADHOC) {
1058                 wiphy_err(wiphy, "received infra assoc request "
1059                                 "when station is in ibss mode\n");
1060                 goto done;
1061         }
1062
1063         wiphy_info(wiphy, "info: Trying to associate to %s and bssid %pM\n",
1064                    (char *)sme->ssid, sme->bssid);
1065
1066         ret = mwifiex_cfg80211_assoc(priv, sme->ssid_len, sme->ssid, sme->bssid,
1067                                      priv->bss_mode, sme->channel, sme, 0);
1068 done:
1069         if (!ret) {
1070                 cfg80211_connect_result(priv->netdev, priv->cfg_bssid, NULL, 0,
1071                                         NULL, 0, WLAN_STATUS_SUCCESS,
1072                                         GFP_KERNEL);
1073                 dev_dbg(priv->adapter->dev,
1074                         "info: associated to bssid %pM successfully\n",
1075                         priv->cfg_bssid);
1076         } else {
1077                 dev_dbg(priv->adapter->dev,
1078                         "info: association to bssid %pM failed\n",
1079                         priv->cfg_bssid);
1080                 memset(priv->cfg_bssid, 0, ETH_ALEN);
1081         }
1082
1083         return ret;
1084 }
1085
1086 /*
1087  * CFG802.11 operation handler to join an IBSS.
1088  *
1089  * This function does not work in any mode other than Ad-Hoc, or if
1090  * a join operation is already in progress.
1091  */
1092 static int
1093 mwifiex_cfg80211_join_ibss(struct wiphy *wiphy, struct net_device *dev,
1094                            struct cfg80211_ibss_params *params)
1095 {
1096         struct mwifiex_private *priv = mwifiex_netdev_get_priv(dev);
1097         int ret = 0;
1098
1099         if (priv->bss_mode != NL80211_IFTYPE_ADHOC) {
1100                 wiphy_err(wiphy, "request to join ibss received "
1101                                 "when station is not in ibss mode\n");
1102                 goto done;
1103         }
1104
1105         wiphy_dbg(wiphy, "info: trying to join to %s and bssid %pM\n",
1106                   (char *) params->ssid, params->bssid);
1107
1108         ret = mwifiex_cfg80211_assoc(priv, params->ssid_len, params->ssid,
1109                                      params->bssid, priv->bss_mode,
1110                                      params->channel, NULL, params->privacy);
1111 done:
1112         if (!ret) {
1113                 cfg80211_ibss_joined(priv->netdev, priv->cfg_bssid, GFP_KERNEL);
1114                 dev_dbg(priv->adapter->dev,
1115                         "info: joined/created adhoc network with bssid"
1116                         " %pM successfully\n", priv->cfg_bssid);
1117         } else {
1118                 dev_dbg(priv->adapter->dev,
1119                         "info: failed creating/joining adhoc network\n");
1120         }
1121
1122         return ret;
1123 }
1124
1125 /*
1126  * CFG802.11 operation handler to leave an IBSS.
1127  *
1128  * This function does not work if a leave operation is
1129  * already in progress.
1130  */
1131 static int
1132 mwifiex_cfg80211_leave_ibss(struct wiphy *wiphy, struct net_device *dev)
1133 {
1134         struct mwifiex_private *priv = mwifiex_netdev_get_priv(dev);
1135
1136         wiphy_dbg(wiphy, "info: disconnecting from essid %pM\n",
1137                   priv->cfg_bssid);
1138         if (mwifiex_deauthenticate(priv, NULL))
1139                 return -EFAULT;
1140
1141         memset(priv->cfg_bssid, 0, ETH_ALEN);
1142
1143         return 0;
1144 }
1145
1146 /*
1147  * CFG802.11 operation handler for scan request.
1148  *
1149  * This function issues a scan request to the firmware based upon
1150  * the user specified scan configuration. On successfull completion,
1151  * it also informs the results.
1152  */
1153 static int
1154 mwifiex_cfg80211_scan(struct wiphy *wiphy, struct net_device *dev,
1155                       struct cfg80211_scan_request *request)
1156 {
1157         struct mwifiex_private *priv = mwifiex_netdev_get_priv(dev);
1158         int i;
1159         struct ieee80211_channel *chan;
1160
1161         wiphy_info(wiphy, "entry: %s\n", __func__);
1162         wiphy_dbg(wiphy, "info: received scan request on %s\n", dev->name);
1163
1164         priv->scan_request = request;
1165
1166         priv->user_scan_cfg = kzalloc(sizeof(struct mwifiex_user_scan_cfg),
1167                                       GFP_KERNEL);
1168         if (!priv->user_scan_cfg) {
1169                 dev_err(priv->adapter->dev, "failed to alloc scan_req\n");
1170                 return -ENOMEM;
1171         }
1172
1173         priv->user_scan_cfg->num_ssids = request->n_ssids;
1174         priv->user_scan_cfg->ssid_list = request->ssids;
1175
1176         if (request->ie && request->ie_len) {
1177                 for (i = 0; i < MWIFIEX_MAX_VSIE_NUM; i++) {
1178                         if (priv->vs_ie[i].mask != MWIFIEX_VSIE_MASK_CLEAR)
1179                                 continue;
1180                         priv->vs_ie[i].mask = MWIFIEX_VSIE_MASK_SCAN;
1181                         memcpy(&priv->vs_ie[i].ie, request->ie,
1182                                request->ie_len);
1183                         break;
1184                 }
1185         }
1186
1187         for (i = 0; i < request->n_channels; i++) {
1188                 chan = request->channels[i];
1189                 priv->user_scan_cfg->chan_list[i].chan_number = chan->hw_value;
1190                 priv->user_scan_cfg->chan_list[i].radio_type = chan->band;
1191
1192                 if (chan->flags & IEEE80211_CHAN_PASSIVE_SCAN)
1193                         priv->user_scan_cfg->chan_list[i].scan_type =
1194                                                 MWIFIEX_SCAN_TYPE_PASSIVE;
1195                 else
1196                         priv->user_scan_cfg->chan_list[i].scan_type =
1197                                                 MWIFIEX_SCAN_TYPE_ACTIVE;
1198
1199                 priv->user_scan_cfg->chan_list[i].scan_time = 0;
1200         }
1201         if (mwifiex_set_user_scan_ioctl(priv, priv->user_scan_cfg))
1202                 return -EFAULT;
1203
1204         if (request->ie && request->ie_len) {
1205                 for (i = 0; i < MWIFIEX_MAX_VSIE_NUM; i++) {
1206                         if (priv->vs_ie[i].mask == MWIFIEX_VSIE_MASK_SCAN) {
1207                                 priv->vs_ie[i].mask = MWIFIEX_VSIE_MASK_CLEAR;
1208                                 memset(&priv->vs_ie[i].ie, 0,
1209                                        MWIFIEX_MAX_VSIE_LEN);
1210                         }
1211                 }
1212         }
1213         return 0;
1214 }
1215
1216 /*
1217  * This function sets up the CFG802.11 specific HT capability fields
1218  * with default values.
1219  *
1220  * The following default values are set -
1221  *      - HT Supported = True
1222  *      - Maximum AMPDU length factor = IEEE80211_HT_MAX_AMPDU_64K
1223  *      - Minimum AMPDU spacing = IEEE80211_HT_MPDU_DENSITY_NONE
1224  *      - HT Capabilities supported by firmware
1225  *      - MCS information, Rx mask = 0xff
1226  *      - MCD information, Tx parameters = IEEE80211_HT_MCS_TX_DEFINED (0x01)
1227  */
1228 static void
1229 mwifiex_setup_ht_caps(struct ieee80211_sta_ht_cap *ht_info,
1230                       struct mwifiex_private *priv)
1231 {
1232         int rx_mcs_supp;
1233         struct ieee80211_mcs_info mcs_set;
1234         u8 *mcs = (u8 *)&mcs_set;
1235         struct mwifiex_adapter *adapter = priv->adapter;
1236
1237         ht_info->ht_supported = true;
1238         ht_info->ampdu_factor = IEEE80211_HT_MAX_AMPDU_64K;
1239         ht_info->ampdu_density = IEEE80211_HT_MPDU_DENSITY_NONE;
1240
1241         memset(&ht_info->mcs, 0, sizeof(ht_info->mcs));
1242
1243         /* Fill HT capability information */
1244         if (ISSUPP_CHANWIDTH40(adapter->hw_dot_11n_dev_cap))
1245                 ht_info->cap |= IEEE80211_HT_CAP_SUP_WIDTH_20_40;
1246         else
1247                 ht_info->cap &= ~IEEE80211_HT_CAP_SUP_WIDTH_20_40;
1248
1249         if (ISSUPP_SHORTGI20(adapter->hw_dot_11n_dev_cap))
1250                 ht_info->cap |= IEEE80211_HT_CAP_SGI_20;
1251         else
1252                 ht_info->cap &= ~IEEE80211_HT_CAP_SGI_20;
1253
1254         if (ISSUPP_SHORTGI40(adapter->hw_dot_11n_dev_cap))
1255                 ht_info->cap |= IEEE80211_HT_CAP_SGI_40;
1256         else
1257                 ht_info->cap &= ~IEEE80211_HT_CAP_SGI_40;
1258
1259         if (ISSUPP_RXSTBC(adapter->hw_dot_11n_dev_cap))
1260                 ht_info->cap |= 1 << IEEE80211_HT_CAP_RX_STBC_SHIFT;
1261         else
1262                 ht_info->cap &= ~(3 << IEEE80211_HT_CAP_RX_STBC_SHIFT);
1263
1264         if (ISSUPP_TXSTBC(adapter->hw_dot_11n_dev_cap))
1265                 ht_info->cap |= IEEE80211_HT_CAP_TX_STBC;
1266         else
1267                 ht_info->cap &= ~IEEE80211_HT_CAP_TX_STBC;
1268
1269         ht_info->cap &= ~IEEE80211_HT_CAP_MAX_AMSDU;
1270         ht_info->cap |= IEEE80211_HT_CAP_SM_PS;
1271
1272         rx_mcs_supp = GET_RXMCSSUPP(adapter->hw_dev_mcs_support);
1273         /* Set MCS for 1x1 */
1274         memset(mcs, 0xff, rx_mcs_supp);
1275         /* Clear all the other values */
1276         memset(&mcs[rx_mcs_supp], 0,
1277                sizeof(struct ieee80211_mcs_info) - rx_mcs_supp);
1278         if (priv->bss_mode == NL80211_IFTYPE_STATION ||
1279             ISSUPP_CHANWIDTH40(adapter->hw_dot_11n_dev_cap))
1280                 /* Set MCS32 for infra mode or ad-hoc mode with 40MHz support */
1281                 SETHT_MCS32(mcs_set.rx_mask);
1282
1283         memcpy((u8 *) &ht_info->mcs, mcs, sizeof(struct ieee80211_mcs_info));
1284
1285         ht_info->mcs.tx_params = IEEE80211_HT_MCS_TX_DEFINED;
1286 }
1287
1288 /*
1289  *  create a new virtual interface with the given name
1290  */
1291 struct net_device *mwifiex_add_virtual_intf(struct wiphy *wiphy,
1292                                             char *name,
1293                                             enum nl80211_iftype type,
1294                                             u32 *flags,
1295                                             struct vif_params *params)
1296 {
1297         struct mwifiex_private *priv = mwifiex_cfg80211_get_priv(wiphy);
1298         struct mwifiex_adapter *adapter;
1299         struct net_device *dev;
1300         void *mdev_priv;
1301
1302         if (!priv)
1303                 return NULL;
1304
1305         adapter = priv->adapter;
1306         if (!adapter)
1307                 return NULL;
1308
1309         switch (type) {
1310         case NL80211_IFTYPE_UNSPECIFIED:
1311         case NL80211_IFTYPE_STATION:
1312         case NL80211_IFTYPE_ADHOC:
1313                 if (priv->bss_mode) {
1314                         wiphy_err(wiphy, "cannot create multiple"
1315                                         " station/adhoc interfaces\n");
1316                         return NULL;
1317                 }
1318
1319                 if (type == NL80211_IFTYPE_UNSPECIFIED)
1320                         priv->bss_mode = NL80211_IFTYPE_STATION;
1321                 else
1322                         priv->bss_mode = type;
1323
1324                 priv->bss_type = MWIFIEX_BSS_TYPE_STA;
1325                 priv->frame_type = MWIFIEX_DATA_FRAME_TYPE_ETH_II;
1326                 priv->bss_priority = 0;
1327                 priv->bss_role = MWIFIEX_BSS_ROLE_STA;
1328                 priv->bss_num = 0;
1329
1330                 break;
1331         default:
1332                 wiphy_err(wiphy, "type not supported\n");
1333                 return NULL;
1334         }
1335
1336         dev = alloc_netdev_mq(sizeof(struct mwifiex_private *), name,
1337                               ether_setup, 1);
1338         if (!dev) {
1339                 wiphy_err(wiphy, "no memory available for netdevice\n");
1340                 goto error;
1341         }
1342
1343         dev_net_set(dev, wiphy_net(wiphy));
1344         dev->ieee80211_ptr = priv->wdev;
1345         dev->ieee80211_ptr->iftype = priv->bss_mode;
1346         memcpy(dev->dev_addr, wiphy->perm_addr, ETH_ALEN);
1347         memcpy(dev->perm_addr, wiphy->perm_addr, ETH_ALEN);
1348         SET_NETDEV_DEV(dev, wiphy_dev(wiphy));
1349
1350         dev->flags |= IFF_BROADCAST | IFF_MULTICAST;
1351         dev->watchdog_timeo = MWIFIEX_DEFAULT_WATCHDOG_TIMEOUT;
1352         dev->hard_header_len += MWIFIEX_MIN_DATA_HEADER_LEN;
1353
1354         mdev_priv = netdev_priv(dev);
1355         *((unsigned long *) mdev_priv) = (unsigned long) priv;
1356
1357         priv->netdev = dev;
1358         mwifiex_init_priv_params(priv, dev);
1359
1360         SET_NETDEV_DEV(dev, adapter->dev);
1361
1362         /* Register network device */
1363         if (register_netdevice(dev)) {
1364                 wiphy_err(wiphy, "cannot register virtual network device\n");
1365                 goto error;
1366         }
1367
1368         sema_init(&priv->async_sem, 1);
1369         priv->scan_pending_on_block = false;
1370
1371         dev_dbg(adapter->dev, "info: %s: Marvell 802.11 Adapter\n", dev->name);
1372
1373 #ifdef CONFIG_DEBUG_FS
1374         mwifiex_dev_debugfs_init(priv);
1375 #endif
1376         return dev;
1377 error:
1378         if (dev && (dev->reg_state == NETREG_UNREGISTERED))
1379                 free_netdev(dev);
1380         priv->bss_mode = NL80211_IFTYPE_UNSPECIFIED;
1381
1382         return NULL;
1383 }
1384 EXPORT_SYMBOL_GPL(mwifiex_add_virtual_intf);
1385
1386 /*
1387  * del_virtual_intf: remove the virtual interface determined by dev
1388  */
1389 int mwifiex_del_virtual_intf(struct wiphy *wiphy, struct net_device *dev)
1390 {
1391         struct mwifiex_private *priv = mwifiex_netdev_get_priv(dev);
1392
1393 #ifdef CONFIG_DEBUG_FS
1394         mwifiex_dev_debugfs_remove(priv);
1395 #endif
1396
1397         if (!netif_queue_stopped(priv->netdev))
1398                 netif_stop_queue(priv->netdev);
1399
1400         if (netif_carrier_ok(priv->netdev))
1401                 netif_carrier_off(priv->netdev);
1402
1403         if (dev->reg_state == NETREG_REGISTERED)
1404                 unregister_netdevice(dev);
1405
1406         if (dev->reg_state == NETREG_UNREGISTERED)
1407                 free_netdev(dev);
1408
1409         /* Clear the priv in adapter */
1410         priv->netdev = NULL;
1411
1412         priv->media_connected = false;
1413
1414         priv->bss_mode = NL80211_IFTYPE_UNSPECIFIED;
1415
1416         return 0;
1417 }
1418 EXPORT_SYMBOL_GPL(mwifiex_del_virtual_intf);
1419
1420 /* station cfg80211 operations */
1421 static struct cfg80211_ops mwifiex_cfg80211_ops = {
1422         .add_virtual_intf = mwifiex_add_virtual_intf,
1423         .del_virtual_intf = mwifiex_del_virtual_intf,
1424         .change_virtual_intf = mwifiex_cfg80211_change_virtual_intf,
1425         .scan = mwifiex_cfg80211_scan,
1426         .connect = mwifiex_cfg80211_connect,
1427         .disconnect = mwifiex_cfg80211_disconnect,
1428         .get_station = mwifiex_cfg80211_get_station,
1429         .dump_station = mwifiex_cfg80211_dump_station,
1430         .set_wiphy_params = mwifiex_cfg80211_set_wiphy_params,
1431         .set_channel = mwifiex_cfg80211_set_channel,
1432         .join_ibss = mwifiex_cfg80211_join_ibss,
1433         .leave_ibss = mwifiex_cfg80211_leave_ibss,
1434         .add_key = mwifiex_cfg80211_add_key,
1435         .del_key = mwifiex_cfg80211_del_key,
1436         .set_default_key = mwifiex_cfg80211_set_default_key,
1437         .set_power_mgmt = mwifiex_cfg80211_set_power_mgmt,
1438         .set_tx_power = mwifiex_cfg80211_set_tx_power,
1439         .set_bitrate_mask = mwifiex_cfg80211_set_bitrate_mask,
1440         .set_cqm_rssi_config = mwifiex_cfg80211_set_cqm_rssi_config,
1441 };
1442
1443 /*
1444  * This function registers the device with CFG802.11 subsystem.
1445  *
1446  * The function creates the wireless device/wiphy, populates it with
1447  * default parameters and handler function pointers, and finally
1448  * registers the device.
1449  */
1450 int mwifiex_register_cfg80211(struct mwifiex_private *priv)
1451 {
1452         int ret;
1453         void *wdev_priv;
1454         struct wireless_dev *wdev;
1455         struct ieee80211_sta_ht_cap *ht_info;
1456         u8 *country_code;
1457
1458         wdev = kzalloc(sizeof(struct wireless_dev), GFP_KERNEL);
1459         if (!wdev) {
1460                 dev_err(priv->adapter->dev, "%s: allocating wireless device\n",
1461                         __func__);
1462                 return -ENOMEM;
1463         }
1464         wdev->wiphy =
1465                 wiphy_new(&mwifiex_cfg80211_ops,
1466                           sizeof(struct mwifiex_private *));
1467         if (!wdev->wiphy) {
1468                 kfree(wdev);
1469                 return -ENOMEM;
1470         }
1471         wdev->iftype = NL80211_IFTYPE_STATION;
1472         wdev->wiphy->max_scan_ssids = 10;
1473         wdev->wiphy->max_scan_ie_len = MWIFIEX_MAX_VSIE_LEN;
1474         wdev->wiphy->interface_modes = BIT(NL80211_IFTYPE_STATION) |
1475                                        BIT(NL80211_IFTYPE_ADHOC);
1476
1477         wdev->wiphy->bands[IEEE80211_BAND_2GHZ] = &mwifiex_band_2ghz;
1478         ht_info = &wdev->wiphy->bands[IEEE80211_BAND_2GHZ]->ht_cap;
1479         mwifiex_setup_ht_caps(ht_info, priv);
1480
1481         if (priv->adapter->config_bands & BAND_A) {
1482                 wdev->wiphy->bands[IEEE80211_BAND_5GHZ] = &mwifiex_band_5ghz;
1483                 ht_info = &wdev->wiphy->bands[IEEE80211_BAND_5GHZ]->ht_cap;
1484                 mwifiex_setup_ht_caps(ht_info, priv);
1485         } else {
1486                 wdev->wiphy->bands[IEEE80211_BAND_5GHZ] = NULL;
1487         }
1488
1489         /* Initialize cipher suits */
1490         wdev->wiphy->cipher_suites = mwifiex_cipher_suites;
1491         wdev->wiphy->n_cipher_suites = ARRAY_SIZE(mwifiex_cipher_suites);
1492
1493         memcpy(wdev->wiphy->perm_addr, priv->curr_addr, ETH_ALEN);
1494         wdev->wiphy->signal_type = CFG80211_SIGNAL_TYPE_MBM;
1495
1496         /* Reserve space for mwifiex specific private data for BSS */
1497         wdev->wiphy->bss_priv_size = sizeof(struct mwifiex_bss_priv);
1498
1499         wdev->wiphy->reg_notifier = mwifiex_reg_notifier;
1500
1501         /* Set struct mwifiex_private pointer in wiphy_priv */
1502         wdev_priv = wiphy_priv(wdev->wiphy);
1503
1504         *(unsigned long *) wdev_priv = (unsigned long) priv;
1505
1506         set_wiphy_dev(wdev->wiphy, (struct device *) priv->adapter->dev);
1507
1508         ret = wiphy_register(wdev->wiphy);
1509         if (ret < 0) {
1510                 dev_err(priv->adapter->dev, "%s: registering cfg80211 device\n",
1511                         __func__);
1512                 wiphy_free(wdev->wiphy);
1513                 kfree(wdev);
1514                 return ret;
1515         } else {
1516                 dev_dbg(priv->adapter->dev,
1517                         "info: successfully registered wiphy device\n");
1518         }
1519
1520         country_code = mwifiex_11d_code_2_region(priv->adapter->region_code);
1521         if (country_code && regulatory_hint(wdev->wiphy, country_code))
1522                 dev_err(priv->adapter->dev,
1523                         "%s: regulatory_hint failed\n", __func__);
1524
1525         priv->wdev = wdev;
1526
1527         return ret;
1528 }