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     -> NO_SEC_CHANNEL
  28  *      NL80211_CHAN_HT20      -> NO_SEC_CHANNEL
  29  *      NL80211_CHAN_HT40PLUS  -> SEC_CHANNEL_ABOVE
  30  *      NL80211_CHAN_HT40MINUS -> SEC_CHANNEL_BELOW
  31  *      Others                 -> NO_SEC_CHANNEL
  32  */
  33 static int
  34 mwifiex_cfg80211_channel_type_to_mwifiex_channels(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 NO_SEC_CHANNEL;
  41         case NL80211_CHAN_HT40PLUS:
  42                 return SEC_CHANNEL_ABOVE;
  43         case NL80211_CHAN_HT40MINUS:
  44                 return SEC_CHANNEL_BELOW;
  45         default:
  46                 return NO_SEC_CHANNEL;
  47         }
  48 }
  49
  50 /*
  51  * This function maps the driver channel type into nl802.11 channel type.
  52  *
  53  * The mapping is as follows -
  54  *      NO_SEC_CHANNEL      -> NL80211_CHAN_HT20
  55  *      SEC_CHANNEL_ABOVE   -> NL80211_CHAN_HT40PLUS
  56  *      SEC_CHANNEL_BELOW   -> NL80211_CHAN_HT40MINUS
  57  *      Others              -> NL80211_CHAN_HT20
  58  */
  59 static enum nl80211_channel_type
  60 mwifiex_channels_to_cfg80211_channel_type(int channel_type)
  61 {
  62         switch (channel_type) {
  63         case NO_SEC_CHANNEL:
  64                 return NL80211_CHAN_HT20;
  65         case SEC_CHANNEL_ABOVE:
  66                 return NL80211_CHAN_HT40PLUS;
  67         case SEC_CHANNEL_BELOW:
  68                 return NL80211_CHAN_HT40MINUS;
  69         default:
  70                 return NL80211_CHAN_HT20;
  71         }
  72 }
  73
  74 /*
  75  * This function checks whether WEP is set.
  76  */
  77 static int
  78 mwifiex_is_alg_wep(u32 cipher)
  79 {
  80         switch (cipher) {
  81         case WLAN_CIPHER_SUITE_WEP40:
  82         case WLAN_CIPHER_SUITE_WEP104:
  83                 return 1;
  84         default:
  85                 break;
  86         }
  87
  88         return 0;
  89 }
  90
  91 /*
  92  * This function retrieves the private structure from kernel wiphy structure.
  93  */
  94 static void *mwifiex_cfg80211_get_priv(struct wiphy *wiphy)
  95 {
  96         return (void *) (*(unsigned long *) wiphy_priv(wiphy));
  97 }
  98
  99 /*
 100  * CFG802.11 operation handler to delete a network key.
 101  */
 102 static int
 103 mwifiex_cfg80211_del_key(struct wiphy *wiphy, struct net_device *netdev,
 104                          u8 key_index, bool pairwise, const u8 *mac_addr)
 105 {
 106         struct mwifiex_private *priv = mwifiex_cfg80211_get_priv(wiphy);
 107
 108         if (mwifiex_set_encode(priv, NULL, 0, key_index, 1)) {
 109                 wiphy_err(wiphy, "deleting the crypto keys\n");
 110                 return -EFAULT;
 111         }
 112
 113         wiphy_dbg(wiphy, "info: crypto keys deleted\n");
 114         return 0;
 115 }
 116
 117 /*
 118  * CFG802.11 operation handler to set Tx power.
 119  */
 120 static int
 121 mwifiex_cfg80211_set_tx_power(struct wiphy *wiphy,
 122                               enum nl80211_tx_power_setting type,
 123                               int dbm)
 124 {
 125         struct mwifiex_private *priv = mwifiex_cfg80211_get_priv(wiphy);
 126         struct mwifiex_power_cfg power_cfg;
 127
 128         if (type == NL80211_TX_POWER_FIXED) {
 129                 power_cfg.is_power_auto = 0;
 130                 power_cfg.power_level = dbm;
 131         } else {
 132                 power_cfg.is_power_auto = 1;
 133         }
 134
 135         return mwifiex_set_tx_power(priv, &power_cfg);
 136 }
 137
 138 /*
 139  * CFG802.11 operation handler to set Power Save option.
 140  *
 141  * The timeout value, if provided, is currently ignored.
 142  */
 143 static int
 144 mwifiex_cfg80211_set_power_mgmt(struct wiphy *wiphy,
 145                                 struct net_device *dev,
 146                                 bool enabled, int timeout)
 147 {
 148         struct mwifiex_private *priv = mwifiex_cfg80211_get_priv(wiphy);
 149         u32 ps_mode;
 150
 151         if (timeout)
 152                 wiphy_dbg(wiphy,
 153                         "info: ignoring the timeout value"
 154                         " for IEEE power save\n");
 155
 156         ps_mode = enabled;
 157
 158         return mwifiex_drv_set_power(priv, &ps_mode);
 159 }
 160
 161 /*
 162  * CFG802.11 operation handler to set the default network key.
 163  */
 164 static int
 165 mwifiex_cfg80211_set_default_key(struct wiphy *wiphy, struct net_device *netdev,
 166                                  u8 key_index, bool unicast,
 167                                  bool multicast)
 168 {
 169         struct mwifiex_private *priv = mwifiex_cfg80211_get_priv(wiphy);
 170
 171         /* Return if WEP key not configured */
 172         if (priv->sec_info.wep_status == MWIFIEX_802_11_WEP_DISABLED)
 173                 return 0;
 174
 175         if (mwifiex_set_encode(priv, NULL, 0, key_index, 0)) {
 176                 wiphy_err(wiphy, "set default Tx key index\n");
 177                 return -EFAULT;
 178         }
 179
 180         return 0;
 181 }
 182
 183 /*
 184  * CFG802.11 operation handler to add a network key.
 185  */
 186 static int
 187 mwifiex_cfg80211_add_key(struct wiphy *wiphy, struct net_device *netdev,
 188                          u8 key_index, bool pairwise, const u8 *mac_addr,
 189                          struct key_params *params)
 190 {
 191         struct mwifiex_private *priv = mwifiex_cfg80211_get_priv(wiphy);
 192
 193         if (mwifiex_set_encode(priv, params->key, params->key_len,
 194                                                         key_index, 0)) {
 195                 wiphy_err(wiphy, "crypto keys added\n");
 196                 return -EFAULT;
 197         }
 198
 199         return 0;
 200 }
 201
 202 /*
 203  * This function sends domain information to the firmware.
 204  *
 205  * The following information are passed to the firmware -
 206  *      - Country codes
 207  *      - Sub bands (first channel, number of channels, maximum Tx power)
 208  */
 209 static int mwifiex_send_domain_info_cmd_fw(struct wiphy *wiphy)
 210 {
 211         u8 no_of_triplet = 0;
 212         struct ieee80211_country_ie_triplet *t;
 213         u8 no_of_parsed_chan = 0;
 214         u8 first_chan = 0, next_chan = 0, max_pwr = 0;
 215         u8 i, flag = 0;
 216         enum ieee80211_band band;
 217         struct ieee80211_supported_band *sband;
 218         struct ieee80211_channel *ch;
 219         struct mwifiex_private *priv = mwifiex_cfg80211_get_priv(wiphy);
 220         struct mwifiex_adapter *adapter = priv->adapter;
 221         struct mwifiex_802_11d_domain_reg *domain_info = &adapter->domain_reg;
 222
 223         /* Set country code */
 224         domain_info->country_code[0] = priv->country_code[0];
 225         domain_info->country_code[1] = priv->country_code[1];
 226         domain_info->country_code[2] = ' ';
 227
 228         band = mwifiex_band_to_radio_type(adapter->config_bands);
 229         if (!wiphy->bands[band]) {
 230                 wiphy_err(wiphy, "11D: setting domain info in FW\n");
 231                 return -1;
 232         }
 233
 234         sband = wiphy->bands[band];
 235
 236         for (i = 0; i < sband->n_channels ; i++) {
 237                 ch = &sband->channels[i];
 238                 if (ch->flags & IEEE80211_CHAN_DISABLED)
 239                         continue;
 240
 241                 if (!flag) {
 242                         flag = 1;
 243                         first_chan = (u32) ch->hw_value;
 244                         next_chan = first_chan;
 245                         max_pwr = ch->max_power;
 246                         no_of_parsed_chan = 1;
 247                         continue;
 248                 }
 249
 250                 if (ch->hw_value == next_chan + 1 &&
 251                                 ch->max_power == max_pwr) {
 252                         next_chan++;
 253                         no_of_parsed_chan++;
 254                 } else {
 255                         t = &domain_info->triplet[no_of_triplet];
 256                         t->chans.first_channel = first_chan;
 257                         t->chans.num_channels = no_of_parsed_chan;
 258                         t->chans.max_power = max_pwr;
 259                         no_of_triplet++;
 260                         first_chan = (u32) ch->hw_value;
 261                         next_chan = first_chan;
 262                         max_pwr = ch->max_power;
 263                         no_of_parsed_chan = 1;
 264                 }
 265         }
 266
 267         if (flag) {
 268                 t = &domain_info->triplet[no_of_triplet];
 269                 t->chans.first_channel = first_chan;
 270                 t->chans.num_channels = no_of_parsed_chan;
 271                 t->chans.max_power = max_pwr;
 272                 no_of_triplet++;
 273         }
 274
 275         domain_info->no_of_triplet = no_of_triplet;
 276
 277         if (mwifiex_send_cmd_async(priv, HostCmd_CMD_802_11D_DOMAIN_INFO,
 278                                      HostCmd_ACT_GEN_SET, 0, NULL)) {
 279                 wiphy_err(wiphy, "11D: setting domain info in FW\n");
 280                 return -1;
 281         }
 282
 283         return 0;
 284 }
 285
 286 /*
 287  * CFG802.11 regulatory domain callback function.
 288  *
 289  * This function is called when the regulatory domain is changed due to the
 290  * following reasons -
 291  *      - Set by driver
 292  *      - Set by system core
 293  *      - Set by user
 294  *      - Set bt Country IE
 295  */
 296 static int mwifiex_reg_notifier(struct wiphy *wiphy,
 297                 struct regulatory_request *request)
 298 {
 299         struct mwifiex_private *priv = mwifiex_cfg80211_get_priv(wiphy);
 300
 301         wiphy_dbg(wiphy, "info: cfg80211 regulatory domain callback for domain"
 302                         " %c%c\n", request->alpha2[0], request->alpha2[1]);
 303
 304         memcpy(priv->country_code, request->alpha2, sizeof(request->alpha2));
 305
 306         switch (request->initiator) {
 307         case NL80211_REGDOM_SET_BY_DRIVER:
 308         case NL80211_REGDOM_SET_BY_CORE:
 309         case NL80211_REGDOM_SET_BY_USER:
 310                 break;
 311                 /* Todo: apply driver specific changes in channel flags based
 312                    on the request initiator if necessary. */
 313         case NL80211_REGDOM_SET_BY_COUNTRY_IE:
 314                 break;
 315         }
 316         mwifiex_send_domain_info_cmd_fw(wiphy);
 317
 318         return 0;
 319 }
 320
 321 /*
 322  * This function sets the RF channel.
 323  *
 324  * This function creates multiple IOCTL requests, populates them accordingly
 325  * and issues them to set the band/channel and frequency.
 326  */
 327 static int
 328 mwifiex_set_rf_channel(struct mwifiex_private *priv,
 329                        struct ieee80211_channel *chan,
 330                        enum nl80211_channel_type channel_type)
 331 {
 332         struct mwifiex_chan_freq_power cfp;
 333         struct mwifiex_ds_band_cfg band_cfg;
 334         u32 config_bands = 0;
 335         struct wiphy *wiphy = priv->wdev->wiphy;
 336
 337         if (chan) {
 338                 memset(&band_cfg, 0, sizeof(band_cfg));
 339                 /* Set appropriate bands */
 340                 if (chan->band == IEEE80211_BAND_2GHZ)
 341                         config_bands = BAND_B | BAND_G | BAND_GN;
 342                 else
 343                         config_bands = BAND_AN | BAND_A;
 344                 if (priv->bss_mode == NL80211_IFTYPE_STATION
 345                     || priv->bss_mode == NL80211_IFTYPE_UNSPECIFIED) {
 346                         band_cfg.config_bands = config_bands;
 347                 } else if (priv->bss_mode == NL80211_IFTYPE_ADHOC) {
 348                         band_cfg.config_bands = config_bands;
 349                         band_cfg.adhoc_start_band = config_bands;
 350                 }
 351
 352                 band_cfg.sec_chan_offset =
 353                         mwifiex_cfg80211_channel_type_to_mwifiex_channels
 354                         (channel_type);
 355
 356                 if (mwifiex_set_radio_band_cfg(priv, &band_cfg))
 357                         return -EFAULT;
 358
 359                 mwifiex_send_domain_info_cmd_fw(wiphy);
 360         }
 361
 362         wiphy_dbg(wiphy, "info: setting band %d, channel offset %d and "
 363                 "mode %d\n", config_bands, band_cfg.sec_chan_offset,
 364                 priv->bss_mode);
 365         if (!chan)
 366                 return 0;
 367
 368         memset(&cfp, 0, sizeof(cfp));
 369         cfp.freq = chan->center_freq;
 370         cfp.channel = ieee80211_frequency_to_channel(chan->center_freq);
 371
 372         if (mwifiex_bss_set_channel(priv, &cfp))
 373                 return -EFAULT;
 374
 375         return mwifiex_drv_change_adhoc_chan(priv, cfp.channel);
 376 }
 377
 378 /*
 379  * CFG802.11 operation handler to set channel.
 380  *
 381  * This function can only be used when station is not connected.
 382  */
 383 static int
 384 mwifiex_cfg80211_set_channel(struct wiphy *wiphy, struct net_device *dev,
 385                              struct ieee80211_channel *chan,
 386                              enum nl80211_channel_type channel_type)
 387 {
 388         struct mwifiex_private *priv = mwifiex_cfg80211_get_priv(wiphy);
 389
 390         if (priv->media_connected) {
 391                 wiphy_err(wiphy, "This setting is valid only when station "
 392                                 "is not connected\n");
 393                 return -EINVAL;
 394         }
 395
 396         return mwifiex_set_rf_channel(priv, chan, channel_type);
 397 }
 398
 399 /*
 400  * This function sets the fragmentation threshold.
 401  *
 402  * The fragmentation threshold value must lie between MWIFIEX_FRAG_MIN_VALUE
 403  * and MWIFIEX_FRAG_MAX_VALUE.
 404  */
 405 static int
 406 mwifiex_set_frag(struct mwifiex_private *priv, u32 frag_thr)
 407 {
 408         int ret;
 409
 410         if (frag_thr < MWIFIEX_FRAG_MIN_VALUE
 411             || frag_thr > MWIFIEX_FRAG_MAX_VALUE)
 412                 return -EINVAL;
 413
 414         /* Send request to firmware */
 415         ret = mwifiex_send_cmd_sync(priv, HostCmd_CMD_802_11_SNMP_MIB,
 416                                     HostCmd_ACT_GEN_SET, FRAG_THRESH_I,
 417                                     &frag_thr);
 418
 419         return ret;
 420 }
 421
 422 /*
 423  * This function sets the RTS threshold.
 424
 425  * The rts value must lie between MWIFIEX_RTS_MIN_VALUE
 426  * and MWIFIEX_RTS_MAX_VALUE.
 427  */
 428 static int
 429 mwifiex_set_rts(struct mwifiex_private *priv, u32 rts_thr)
 430 {
 431         if (rts_thr < MWIFIEX_RTS_MIN_VALUE || rts_thr > MWIFIEX_RTS_MAX_VALUE)
 432                 rts_thr = MWIFIEX_RTS_MAX_VALUE;
 433
 434         return mwifiex_send_cmd_sync(priv, HostCmd_CMD_802_11_SNMP_MIB,
 435                                     HostCmd_ACT_GEN_SET, RTS_THRESH_I,
 436                                     &rts_thr);
 437 }
 438
 439 /*
 440  * CFG802.11 operation handler to set wiphy parameters.
 441  *
 442  * This function can be used to set the RTS threshold and the
 443  * Fragmentation threshold of the driver.
 444  */
 445 static int
 446 mwifiex_cfg80211_set_wiphy_params(struct wiphy *wiphy, u32 changed)
 447 {
 448         struct mwifiex_private *priv = mwifiex_cfg80211_get_priv(wiphy);
 449         int ret = 0;
 450
 451         if (changed & WIPHY_PARAM_RTS_THRESHOLD) {
 452                 ret = mwifiex_set_rts(priv, wiphy->rts_threshold);
 453                 if (ret)
 454                         return ret;
 455         }
 456
 457         if (changed & WIPHY_PARAM_FRAG_THRESHOLD)
 458                 ret = mwifiex_set_frag(priv, wiphy->frag_threshold);
 459
 460         return ret;
 461 }
 462
 463 /*
 464  * CFG802.11 operation handler to change interface type.
 465  */
 466 static int
 467 mwifiex_cfg80211_change_virtual_intf(struct wiphy *wiphy,
 468                                      struct net_device *dev,
 469                                      enum nl80211_iftype type, u32 *flags,
 470                                      struct vif_params *params)
 471 {
 472         int ret;
 473         struct mwifiex_private *priv = mwifiex_netdev_get_priv(dev);
 474
 475         if (priv->bss_mode == type) {
 476                 wiphy_warn(wiphy, "already set to required type\n");
 477                 return 0;
 478         }
 479
 480         priv->bss_mode = type;
 481
 482         switch (type) {
 483         case NL80211_IFTYPE_ADHOC:
 484                 dev->ieee80211_ptr->iftype = NL80211_IFTYPE_ADHOC;
 485                 wiphy_dbg(wiphy, "info: setting interface type to adhoc\n");
 486                 break;
 487         case NL80211_IFTYPE_STATION:
 488                 dev->ieee80211_ptr->iftype = NL80211_IFTYPE_STATION;
 489                 wiphy_dbg(wiphy, "info: setting interface type to managed\n");
 490                 break;
 491         case NL80211_IFTYPE_UNSPECIFIED:
 492                 dev->ieee80211_ptr->iftype = NL80211_IFTYPE_STATION;
 493                 wiphy_dbg(wiphy, "info: setting interface type to auto\n");
 494                 return 0;
 495         default:
 496                 wiphy_err(wiphy, "unknown interface type: %d\n", type);
 497                 return -EINVAL;
 498         }
 499
 500         mwifiex_deauthenticate(priv, NULL);
 501
 502         priv->sec_info.authentication_mode = NL80211_AUTHTYPE_OPEN_SYSTEM;
 503
 504         ret = mwifiex_send_cmd_sync(priv, HostCmd_CMD_SET_BSS_MODE,
 505                                     HostCmd_ACT_GEN_SET, 0, NULL);
 506
 507         return ret;
 508 }
 509
 510 /*
 511  * This function dumps the station information on a buffer.
 512  *
 513  * The following information are shown -
 514  *      - Total bytes transmitted
 515  *      - Total bytes received
 516  *      - Total packets transmitted
 517  *      - Total packets received
 518  *      - Signal quality level
 519  *      - Transmission rate
 520  */
 521 static int
 522 mwifiex_dump_station_info(struct mwifiex_private *priv,
 523                           struct station_info *sinfo)
 524 {
 525         struct mwifiex_ds_get_signal signal;
 526         struct mwifiex_rate_cfg rate;
 527         int ret = 0;
 528
 529         sinfo->filled = STATION_INFO_RX_BYTES | STATION_INFO_TX_BYTES |
 530                 STATION_INFO_RX_PACKETS |
 531                 STATION_INFO_TX_PACKETS
 532                 | STATION_INFO_SIGNAL | STATION_INFO_TX_BITRATE;
 533
 534         /* Get signal information from the firmware */
 535         memset(&signal, 0, sizeof(struct mwifiex_ds_get_signal));
 536         if (mwifiex_get_signal_info(priv, &signal)) {
 537                 dev_err(priv->adapter->dev, "getting signal information\n");
 538                 ret = -EFAULT;
 539         }
 540
 541         if (mwifiex_drv_get_data_rate(priv, &rate)) {
 542                 dev_err(priv->adapter->dev, "getting data rate\n");
 543                 ret = -EFAULT;
 544         }
 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 15.
 549          */
 550         if ((priv->tx_htinfo & BIT(0)) && (priv->tx_rate < 16)) {
 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->rx_bytes = priv->stats.rx_bytes;
 562         sinfo->tx_bytes = priv->stats.tx_bytes;
 563         sinfo->rx_packets = priv->stats.rx_packets;
 564         sinfo->tx_packets = priv->stats.tx_packets;
 565         sinfo->signal = priv->qual_level;
 566         /* bit rate is in 500 kb/s units. Convert it to 100kb/s units */
 567         sinfo->txrate.legacy = rate.rate * 5;
 568
 569         return ret;
 570 }
 571
 572 /*
 573  * CFG802.11 operation handler to get station information.
 574  *
 575  * This function only works in connected mode, and dumps the
 576  * requested station information, if available.
 577  */
 578 static int
 579 mwifiex_cfg80211_get_station(struct wiphy *wiphy, struct net_device *dev,
 580                              u8 *mac, struct station_info *sinfo)
 581 {
 582         struct mwifiex_private *priv = mwifiex_netdev_get_priv(dev);
 583
 584         if (!priv->media_connected)
 585                 return -ENOENT;
 586         if (memcmp(mac, priv->cfg_bssid, ETH_ALEN))
 587                 return -ENOENT;
 588
 589         return mwifiex_dump_station_info(priv, sinfo);
 590 }
 591
 592 /* Supported rates to be advertised to the cfg80211 */
 593
 594 static struct ieee80211_rate mwifiex_rates[] = {
 595         {.bitrate = 10, .hw_value = 2, },
 596         {.bitrate = 20, .hw_value = 4, },
 597         {.bitrate = 55, .hw_value = 11, },
 598         {.bitrate = 110, .hw_value = 22, },
 599         {.bitrate = 220, .hw_value = 44, },
 600         {.bitrate = 60, .hw_value = 12, },
 601         {.bitrate = 90, .hw_value = 18, },
 602         {.bitrate = 120, .hw_value = 24, },
 603         {.bitrate = 180, .hw_value = 36, },
 604         {.bitrate = 240, .hw_value = 48, },
 605         {.bitrate = 360, .hw_value = 72, },
 606         {.bitrate = 480, .hw_value = 96, },
 607         {.bitrate = 540, .hw_value = 108, },
 608         {.bitrate = 720, .hw_value = 144, },
 609 };
 610
 611 /* Channel definitions to be advertised to cfg80211 */
 612
 613 static struct ieee80211_channel mwifiex_channels_2ghz[] = {
 614         {.center_freq = 2412, .hw_value = 1, },
 615         {.center_freq = 2417, .hw_value = 2, },
 616         {.center_freq = 2422, .hw_value = 3, },
 617         {.center_freq = 2427, .hw_value = 4, },
 618         {.center_freq = 2432, .hw_value = 5, },
 619         {.center_freq = 2437, .hw_value = 6, },
 620         {.center_freq = 2442, .hw_value = 7, },
 621         {.center_freq = 2447, .hw_value = 8, },
 622         {.center_freq = 2452, .hw_value = 9, },
 623         {.center_freq = 2457, .hw_value = 10, },
 624         {.center_freq = 2462, .hw_value = 11, },
 625         {.center_freq = 2467, .hw_value = 12, },
 626         {.center_freq = 2472, .hw_value = 13, },
 627         {.center_freq = 2484, .hw_value = 14, },
 628 };
 629
 630 static struct ieee80211_supported_band mwifiex_band_2ghz = {
 631         .channels = mwifiex_channels_2ghz,
 632         .n_channels = ARRAY_SIZE(mwifiex_channels_2ghz),
 633         .bitrates = mwifiex_rates,
 634         .n_bitrates = 14,
 635 };
 636
 637 static struct ieee80211_channel mwifiex_channels_5ghz[] = {
 638         {.center_freq = 5040, .hw_value = 8, },
 639         {.center_freq = 5060, .hw_value = 12, },
 640         {.center_freq = 5080, .hw_value = 16, },
 641         {.center_freq = 5170, .hw_value = 34, },
 642         {.center_freq = 5190, .hw_value = 38, },
 643         {.center_freq = 5210, .hw_value = 42, },
 644         {.center_freq = 5230, .hw_value = 46, },
 645         {.center_freq = 5180, .hw_value = 36, },
 646         {.center_freq = 5200, .hw_value = 40, },
 647         {.center_freq = 5220, .hw_value = 44, },
 648         {.center_freq = 5240, .hw_value = 48, },
 649         {.center_freq = 5260, .hw_value = 52, },
 650         {.center_freq = 5280, .hw_value = 56, },
 651         {.center_freq = 5300, .hw_value = 60, },
 652         {.center_freq = 5320, .hw_value = 64, },
 653         {.center_freq = 5500, .hw_value = 100, },
 654         {.center_freq = 5520, .hw_value = 104, },
 655         {.center_freq = 5540, .hw_value = 108, },
 656         {.center_freq = 5560, .hw_value = 112, },
 657         {.center_freq = 5580, .hw_value = 116, },
 658         {.center_freq = 5600, .hw_value = 120, },
 659         {.center_freq = 5620, .hw_value = 124, },
 660         {.center_freq = 5640, .hw_value = 128, },
 661         {.center_freq = 5660, .hw_value = 132, },
 662         {.center_freq = 5680, .hw_value = 136, },
 663         {.center_freq = 5700, .hw_value = 140, },
 664         {.center_freq = 5745, .hw_value = 149, },
 665         {.center_freq = 5765, .hw_value = 153, },
 666         {.center_freq = 5785, .hw_value = 157, },
 667         {.center_freq = 5805, .hw_value = 161, },
 668         {.center_freq = 5825, .hw_value = 165, },
 669 };
 670
 671 static struct ieee80211_supported_band mwifiex_band_5ghz = {
 672         .channels = mwifiex_channels_5ghz,
 673         .n_channels = ARRAY_SIZE(mwifiex_channels_5ghz),
 674         .bitrates = mwifiex_rates - 4,
 675         .n_bitrates = ARRAY_SIZE(mwifiex_rates) + 4,
 676 };
 677
 678
 679 /* Supported crypto cipher suits to be advertised to cfg80211 */
 680
 681 static const u32 mwifiex_cipher_suites[] = {
 682         WLAN_CIPHER_SUITE_WEP40,
 683         WLAN_CIPHER_SUITE_WEP104,
 684         WLAN_CIPHER_SUITE_TKIP,
 685         WLAN_CIPHER_SUITE_CCMP,
 686 };
 687
 688 /*
 689  * CFG802.11 operation handler for setting bit rates.
 690  *
 691  * Function selects legacy bang B/G/BG from corresponding bitrates selection.
 692  * Currently only 2.4GHz band is supported.
 693  */
 694 static int mwifiex_cfg80211_set_bitrate_mask(struct wiphy *wiphy,
 695                                 struct net_device *dev,
 696                                 const u8 *peer,
 697                                 const struct cfg80211_bitrate_mask *mask)
 698 {
 699         struct mwifiex_ds_band_cfg band_cfg;
 700         struct mwifiex_private *priv = mwifiex_netdev_get_priv(dev);
 701         int index = 0, mode = 0, i;
 702
 703         /* Currently only 2.4GHz is supported */
 704         for (i = 0; i < mwifiex_band_2ghz.n_bitrates; i++) {
 705                 /*
 706                  * Rates below 6 Mbps in the table are CCK rates; 802.11b
 707                  * and from 6 they are OFDM; 802.11G
 708                  */
 709                 if (mwifiex_rates[i].bitrate == 60) {
 710                         index = 1 << i;
 711                         break;
 712                 }
 713         }
 714
 715         if (mask->control[IEEE80211_BAND_2GHZ].legacy < index) {
 716                 mode = BAND_B;
 717         } else {
 718                 mode = BAND_G;
 719                 if (mask->control[IEEE80211_BAND_2GHZ].legacy % index)
 720                         mode |=  BAND_B;
 721         }
 722
 723         memset(&band_cfg, 0, sizeof(band_cfg));
 724         band_cfg.config_bands = mode;
 725
 726         if (priv->bss_mode == NL80211_IFTYPE_ADHOC)
 727                 band_cfg.adhoc_start_band = mode;
 728
 729         band_cfg.sec_chan_offset = NO_SEC_CHANNEL;
 730
 731         if (mwifiex_set_radio_band_cfg(priv, &band_cfg))
 732                 return -EFAULT;
 733
 734         wiphy_debug(wiphy, "info: device configured in 802.11%s%s mode\n",
 735                                 (mode & BAND_B) ? "b" : "",
 736                                 (mode & BAND_G) ? "g" : "");
 737
 738         return 0;
 739 }
 740
 741 /*
 742  * CFG802.11 operation handler for disconnection request.
 743  *
 744  * This function does not work when there is already a disconnection
 745  * procedure going on.
 746  */
 747 static int
 748 mwifiex_cfg80211_disconnect(struct wiphy *wiphy, struct net_device *dev,
 749                             u16 reason_code)
 750 {
 751         struct mwifiex_private *priv = mwifiex_netdev_get_priv(dev);
 752
 753         if (priv->disconnect)
 754                 return -EBUSY;
 755
 756         priv->disconnect = 1;
 757         if (mwifiex_deauthenticate(priv, NULL))
 758                 return -EFAULT;
 759
 760         wiphy_dbg(wiphy, "info: successfully disconnected from %pM:"
 761                 " reason code %d\n", priv->cfg_bssid, reason_code);
 762
 763         queue_work(priv->workqueue, &priv->cfg_workqueue);
 764
 765         return 0;
 766 }
 767
 768 /*
 769  * This function informs the CFG802.11 subsystem of a new IBSS.
 770  *
 771  * The following information are sent to the CFG802.11 subsystem
 772  * to register the new IBSS. If we do not register the new IBSS,
 773  * a kernel panic will result.
 774  *      - SSID
 775  *      - SSID length
 776  *      - BSSID
 777  *      - Channel
 778  */
 779 static int mwifiex_cfg80211_inform_ibss_bss(struct mwifiex_private *priv)
 780 {
 781         struct ieee80211_channel *chan;
 782         struct mwifiex_bss_info bss_info;
 783         int ie_len;
 784         u8 ie_buf[IEEE80211_MAX_SSID_LEN + sizeof(struct ieee_types_header)];
 785         enum ieee80211_band band;
 786
 787         if (mwifiex_get_bss_info(priv, &bss_info))
 788                 return -1;
 789
 790         ie_buf[0] = WLAN_EID_SSID;
 791         ie_buf[1] = bss_info.ssid.ssid_len;
 792
 793         memcpy(&ie_buf[sizeof(struct ieee_types_header)],
 794                         &bss_info.ssid.ssid,
 795                         bss_info.ssid.ssid_len);
 796         ie_len = ie_buf[1] + sizeof(struct ieee_types_header);
 797
 798         band = mwifiex_band_to_radio_type(priv->curr_bss_params.band);
 799         chan = __ieee80211_get_channel(priv->wdev->wiphy,
 800                         ieee80211_channel_to_frequency(bss_info.bss_chan,
 801                                                        band));
 802
 803         cfg80211_inform_bss(priv->wdev->wiphy, chan,
 804                 bss_info.bssid, 0, WLAN_CAPABILITY_IBSS,
 805                 0, ie_buf, ie_len, 0, GFP_KERNEL);
 806         memcpy(priv->cfg_bssid, bss_info.bssid, ETH_ALEN);
 807
 808         return 0;
 809 }
 810
 811 /*
 812  * This function connects with a BSS.
 813  *
 814  * This function handles both Infra and Ad-Hoc modes. It also performs
 815  * validity checking on the provided parameters, disconnects from the
 816  * current BSS (if any), sets up the association/scan parameters,
 817  * including security settings, and performs specific SSID scan before
 818  * trying to connect.
 819  *
 820  * For Infra mode, the function returns failure if the specified SSID
 821  * is not found in scan table. However, for Ad-Hoc mode, it can create
 822  * the IBSS if it does not exist. On successful completion in either case,
 823  * the function notifies the CFG802.11 subsystem of the new BSS connection.
 824  */
 825 static int
 826 mwifiex_cfg80211_assoc(struct mwifiex_private *priv, size_t ssid_len, u8 *ssid,
 827                        u8 *bssid, int mode, struct ieee80211_channel *channel,
 828                        struct cfg80211_connect_params *sme, bool privacy)
 829 {
 830         struct mwifiex_802_11_ssid req_ssid;
 831         int ret, auth_type = 0;
 832         struct cfg80211_bss *bss = NULL;
 833         u8 is_scanning_required = 0;
 834
 835         memset(&req_ssid, 0, sizeof(struct mwifiex_802_11_ssid));
 836
 837         req_ssid.ssid_len = ssid_len;
 838         if (ssid_len > IEEE80211_MAX_SSID_LEN) {
 839                 dev_err(priv->adapter->dev, "invalid SSID - aborting\n");
 840                 return -EINVAL;
 841         }
 842
 843         memcpy(req_ssid.ssid, ssid, ssid_len);
 844         if (!req_ssid.ssid_len || req_ssid.ssid[0] < 0x20) {
 845                 dev_err(priv->adapter->dev, "invalid SSID - aborting\n");
 846                 return -EINVAL;
 847         }
 848
 849         /* disconnect before try to associate */
 850         mwifiex_deauthenticate(priv, NULL);
 851
 852         if (channel)
 853                 ret = mwifiex_set_rf_channel(priv, channel,
 854                                 mwifiex_channels_to_cfg80211_channel_type
 855                                 (priv->adapter->chan_offset));
 856
 857         ret = mwifiex_set_encode(priv, NULL, 0, 0, 1);  /* Disable keys */
 858
 859         if (mode == NL80211_IFTYPE_ADHOC) {
 860                 /* "privacy" is set only for ad-hoc mode */
 861                 if (privacy) {
 862                         /*
 863                          * Keep WLAN_CIPHER_SUITE_WEP104 for now so that
 864                          * the firmware can find a matching network from the
 865                          * scan. The cfg80211 does not give us the encryption
 866                          * mode at this stage so just setting it to WEP here.
 867                          */
 868                         priv->sec_info.encryption_mode =
 869                                         WLAN_CIPHER_SUITE_WEP104;
 870                         priv->sec_info.authentication_mode =
 871                                         NL80211_AUTHTYPE_OPEN_SYSTEM;
 872                 }
 873
 874                 goto done;
 875         }
 876
 877         /* Now handle infra mode. "sme" is valid for infra mode only */
 878         if (sme->auth_type == NL80211_AUTHTYPE_AUTOMATIC
 879                         || sme->auth_type == NL80211_AUTHTYPE_OPEN_SYSTEM)
 880                 auth_type = NL80211_AUTHTYPE_OPEN_SYSTEM;
 881         else if (sme->auth_type == NL80211_AUTHTYPE_SHARED_KEY)
 882                 auth_type = NL80211_AUTHTYPE_SHARED_KEY;
 883
 884         if (sme->crypto.n_ciphers_pairwise) {
 885                 priv->sec_info.encryption_mode =
 886                                                 sme->crypto.ciphers_pairwise[0];
 887                 priv->sec_info.authentication_mode = auth_type;
 888         }
 889
 890         if (sme->crypto.cipher_group) {
 891                 priv->sec_info.encryption_mode = sme->crypto.cipher_group;
 892                 priv->sec_info.authentication_mode = auth_type;
 893         }
 894         if (sme->ie)
 895                 ret = mwifiex_set_gen_ie(priv, sme->ie, sme->ie_len);
 896
 897         if (sme->key) {
 898                 if (mwifiex_is_alg_wep(priv->sec_info.encryption_mode)) {
 899                         dev_dbg(priv->adapter->dev,
 900                                 "info: setting wep encryption"
 901                                 " with key len %d\n", sme->key_len);
 902                         ret = mwifiex_set_encode(priv, sme->key, sme->key_len,
 903                                                         sme->key_idx, 0);
 904                 }
 905         }
 906 done:
 907         /* Do specific SSID scanning */
 908         if (mwifiex_request_scan(priv, &req_ssid)) {
 909                 dev_err(priv->adapter->dev, "scan error\n");
 910                 return -EFAULT;
 911         }
 912
 913         /*
 914          * Scan entries are valid for some time (15 sec). So we can save one
 915          * active scan time if we just try cfg80211_get_bss first. If it fails
 916          * then request scan and cfg80211_get_bss() again for final output.
 917          */
 918         while (1) {
 919                 if (is_scanning_required) {
 920                         /* Do specific SSID scanning */
 921                         if (mwifiex_request_scan(priv, &req_ssid)) {
 922                                 dev_err(priv->adapter->dev, "scan error\n");
 923                                 return -EFAULT;
 924                         }
 925                 }
 926
 927                 /* Find the BSS we want using available scan results */
 928                 if (mode == NL80211_IFTYPE_ADHOC)
 929                         bss = cfg80211_get_bss(priv->wdev->wiphy, channel,
 930                                                bssid, ssid, ssid_len,
 931                                                WLAN_CAPABILITY_IBSS,
 932                                                WLAN_CAPABILITY_IBSS);
 933                 else
 934                         bss = cfg80211_get_bss(priv->wdev->wiphy, channel,
 935                                                bssid, ssid, ssid_len,
 936                                                WLAN_CAPABILITY_ESS,
 937                                                WLAN_CAPABILITY_ESS);
 938
 939                 if (!bss) {
 940                         if (is_scanning_required) {
 941                                 dev_warn(priv->adapter->dev, "assoc: requested "
 942                                          "bss not found in scan results\n");
 943                                 break;
 944                         }
 945                         is_scanning_required = 1;
 946                 } else {
 947                         dev_dbg(priv->adapter->dev, "info: trying to associate to '%.*s' bssid %pM\n",
 948                                 req_ssid.ssid_len, (char *)req_ssid.ssid,
 949                                 bss->bssid);
 950                         memcpy(&priv->cfg_bssid, bss->bssid, ETH_ALEN);
 951                         break;
 952                 }
 953         }
 954
 955         if (mwifiex_bss_start(priv, bss, &req_ssid))
 956                 return -EFAULT;
 957
 958         if (mode == NL80211_IFTYPE_ADHOC) {
 959                 /* Inform the BSS information to kernel, otherwise
 960                  * kernel will give a panic after successful assoc */
 961                 if (mwifiex_cfg80211_inform_ibss_bss(priv))
 962                         return -EFAULT;
 963         }
 964
 965         return ret;
 966 }
 967
 968 /*
 969  * CFG802.11 operation handler for association request.
 970  *
 971  * This function does not work when the current mode is set to Ad-Hoc, or
 972  * when there is already an association procedure going on. The given BSS
 973  * information is used to associate.
 974  */
 975 static int
 976 mwifiex_cfg80211_connect(struct wiphy *wiphy, struct net_device *dev,
 977                          struct cfg80211_connect_params *sme)
 978 {
 979         struct mwifiex_private *priv = mwifiex_netdev_get_priv(dev);
 980         int ret = 0;
 981
 982         if (priv->assoc_request)
 983                 return -EBUSY;
 984
 985         if (priv->bss_mode == NL80211_IFTYPE_ADHOC) {
 986                 wiphy_err(wiphy, "received infra assoc request "
 987                                 "when station is in ibss mode\n");
 988                 goto done;
 989         }
 990
 991         priv->assoc_request = -EINPROGRESS;
 992
 993         wiphy_dbg(wiphy, "info: Trying to associate to %.*s and bssid %pM\n",
 994                   (int)sme->ssid_len, (char *)sme->ssid, sme->bssid);
 995
 996         ret = mwifiex_cfg80211_assoc(priv, sme->ssid_len, sme->ssid, sme->bssid,
 997                                      priv->bss_mode, sme->channel, sme, 0);
 998
 999         priv->assoc_request = 1;
1000 done:
1001         priv->assoc_result = ret;
1002         queue_work(priv->workqueue, &priv->cfg_workqueue);
1003         return ret;
1004 }
1005
1006 /*
1007  * CFG802.11 operation handler to join an IBSS.
1008  *
1009  * This function does not work in any mode other than Ad-Hoc, or if
1010  * a join operation is already in progress.
1011  */
1012 static int
1013 mwifiex_cfg80211_join_ibss(struct wiphy *wiphy, struct net_device *dev,
1014                            struct cfg80211_ibss_params *params)
1015 {
1016         struct mwifiex_private *priv = mwifiex_cfg80211_get_priv(wiphy);
1017         int ret = 0;
1018
1019         if (priv->ibss_join_request)
1020                 return -EBUSY;
1021
1022         if (priv->bss_mode != NL80211_IFTYPE_ADHOC) {
1023                 wiphy_err(wiphy, "request to join ibss received "
1024                                 "when station is not in ibss mode\n");
1025                 goto done;
1026         }
1027
1028         priv->ibss_join_request = -EINPROGRESS;
1029
1030         wiphy_dbg(wiphy, "info: trying to join to %.*s and bssid %pM\n",
1031                   params->ssid_len, (char *)params->ssid, params->bssid);
1032
1033         ret = mwifiex_cfg80211_assoc(priv, params->ssid_len, params->ssid,
1034                                 params->bssid, priv->bss_mode,
1035                                 params->channel, NULL, params->privacy);
1036
1037         priv->ibss_join_request = 1;
1038 done:
1039         priv->ibss_join_result = ret;
1040         queue_work(priv->workqueue, &priv->cfg_workqueue);
1041         return ret;
1042 }
1043
1044 /*
1045  * CFG802.11 operation handler to leave an IBSS.
1046  *
1047  * This function does not work if a leave operation is
1048  * already in progress.
1049  */
1050 static int
1051 mwifiex_cfg80211_leave_ibss(struct wiphy *wiphy, struct net_device *dev)
1052 {
1053         struct mwifiex_private *priv = mwifiex_cfg80211_get_priv(wiphy);
1054
1055         if (priv->disconnect)
1056                 return -EBUSY;
1057
1058         priv->disconnect = 1;
1059
1060         wiphy_dbg(wiphy, "info: disconnecting from essid %pM\n",
1061                         priv->cfg_bssid);
1062         if (mwifiex_deauthenticate(priv, NULL))
1063                 return -EFAULT;
1064
1065         queue_work(priv->workqueue, &priv->cfg_workqueue);
1066
1067         return 0;
1068 }
1069
1070 /*
1071  * CFG802.11 operation handler for scan request.
1072  *
1073  * This function issues a scan request to the firmware based upon
1074  * the user specified scan configuration. On successfull completion,
1075  * it also informs the results.
1076  */
1077 static int
1078 mwifiex_cfg80211_scan(struct wiphy *wiphy, struct net_device *dev,
1079                       struct cfg80211_scan_request *request)
1080 {
1081         struct mwifiex_private *priv = mwifiex_netdev_get_priv(dev);
1082
1083         wiphy_dbg(wiphy, "info: received scan request on %s\n", dev->name);
1084
1085         if (priv->scan_request && priv->scan_request != request)
1086                 return -EBUSY;
1087
1088         priv->scan_request = request;
1089
1090         queue_work(priv->workqueue, &priv->cfg_workqueue);
1091         return 0;
1092 }
1093
1094 /*
1095  * This function sets up the CFG802.11 specific HT capability fields
1096  * with default values.
1097  *
1098  * The following default values are set -
1099  *      - HT Supported = True
1100  *      - Maximum AMPDU length factor = IEEE80211_HT_MAX_AMPDU_64K
1101  *      - Minimum AMPDU spacing = IEEE80211_HT_MPDU_DENSITY_NONE
1102  *      - HT Capabilities supported by firmware
1103  *      - MCS information, Rx mask = 0xff
1104  *      - MCD information, Tx parameters = IEEE80211_HT_MCS_TX_DEFINED (0x01)
1105  */
1106 static void
1107 mwifiex_setup_ht_caps(struct ieee80211_sta_ht_cap *ht_info,
1108                       struct mwifiex_private *priv)
1109 {
1110         int rx_mcs_supp;
1111         struct ieee80211_mcs_info mcs_set;
1112         u8 *mcs = (u8 *)&mcs_set;
1113         struct mwifiex_adapter *adapter = priv->adapter;
1114
1115         ht_info->ht_supported = true;
1116         ht_info->ampdu_factor = IEEE80211_HT_MAX_AMPDU_64K;
1117         ht_info->ampdu_density = IEEE80211_HT_MPDU_DENSITY_NONE;
1118
1119         memset(&ht_info->mcs, 0, sizeof(ht_info->mcs));
1120
1121         /* Fill HT capability information */
1122         if (ISSUPP_CHANWIDTH40(adapter->hw_dot_11n_dev_cap))
1123                 ht_info->cap |= IEEE80211_HT_CAP_SUP_WIDTH_20_40;
1124         else
1125                 ht_info->cap &= ~IEEE80211_HT_CAP_SUP_WIDTH_20_40;
1126
1127         if (ISSUPP_SHORTGI20(adapter->hw_dot_11n_dev_cap))
1128                 ht_info->cap |= IEEE80211_HT_CAP_SGI_20;
1129         else
1130                 ht_info->cap &= ~IEEE80211_HT_CAP_SGI_20;
1131
1132         if (ISSUPP_SHORTGI40(adapter->hw_dot_11n_dev_cap))
1133                 ht_info->cap |= IEEE80211_HT_CAP_SGI_40;
1134         else
1135                 ht_info->cap &= ~IEEE80211_HT_CAP_SGI_40;
1136
1137         if (ISSUPP_RXSTBC(adapter->hw_dot_11n_dev_cap))
1138                 ht_info->cap |= 1 << IEEE80211_HT_CAP_RX_STBC_SHIFT;
1139         else
1140                 ht_info->cap &= ~(3 << IEEE80211_HT_CAP_RX_STBC_SHIFT);
1141
1142         if (ISSUPP_TXSTBC(adapter->hw_dot_11n_dev_cap))
1143                 ht_info->cap |= IEEE80211_HT_CAP_TX_STBC;
1144         else
1145                 ht_info->cap &= ~IEEE80211_HT_CAP_TX_STBC;
1146
1147         ht_info->cap &= ~IEEE80211_HT_CAP_MAX_AMSDU;
1148         ht_info->cap |= IEEE80211_HT_CAP_SM_PS;
1149
1150         rx_mcs_supp = GET_RXMCSSUPP(adapter->hw_dev_mcs_support);
1151         /* Set MCS for 1x1 */
1152         memset(mcs, 0xff, rx_mcs_supp);
1153         /* Clear all the other values */
1154         memset(&mcs[rx_mcs_supp], 0,
1155                         sizeof(struct ieee80211_mcs_info) - rx_mcs_supp);
1156         if (priv->bss_mode == NL80211_IFTYPE_STATION ||
1157                         ISSUPP_CHANWIDTH40(adapter->hw_dot_11n_dev_cap))
1158                 /* Set MCS32 for infra mode or ad-hoc mode with 40MHz support */
1159                 SETHT_MCS32(mcs_set.rx_mask);
1160
1161         memcpy((u8 *) &ht_info->mcs, mcs, sizeof(struct ieee80211_mcs_info));
1162
1163         ht_info->mcs.tx_params = IEEE80211_HT_MCS_TX_DEFINED;
1164 }
1165
1166 /*
1167  *  create a new virtual interface with the given name
1168  */
1169 struct net_device *mwifiex_add_virtual_intf(struct wiphy *wiphy,
1170                                                 char *name,
1171                                                 enum nl80211_iftype type,
1172                                                 u32 *flags,
1173                                                 struct vif_params *params)
1174 {
1175         struct mwifiex_private *priv = mwifiex_cfg80211_get_priv(wiphy);
1176         struct mwifiex_adapter *adapter;
1177         struct net_device *dev;
1178         void *mdev_priv;
1179
1180         if (!priv)
1181                 return ERR_PTR(-EFAULT);
1182
1183         adapter = priv->adapter;
1184         if (!adapter)
1185                 return ERR_PTR(-EFAULT);
1186
1187         switch (type) {
1188         case NL80211_IFTYPE_UNSPECIFIED:
1189         case NL80211_IFTYPE_STATION:
1190         case NL80211_IFTYPE_ADHOC:
1191                 if (priv->bss_mode) {
1192                         wiphy_err(wiphy, "cannot create multiple"
1193                                         " station/adhoc interfaces\n");
1194                         return ERR_PTR(-EINVAL);
1195                 }
1196
1197                 if (type == NL80211_IFTYPE_UNSPECIFIED)
1198                         priv->bss_mode = NL80211_IFTYPE_STATION;
1199                 else
1200                         priv->bss_mode = type;
1201
1202                 priv->bss_type = MWIFIEX_BSS_TYPE_STA;
1203                 priv->frame_type = MWIFIEX_DATA_FRAME_TYPE_ETH_II;
1204                 priv->bss_priority = 0;
1205                 priv->bss_role = MWIFIEX_BSS_ROLE_STA;
1206                 priv->bss_index = 0;
1207                 priv->bss_num = 0;
1208
1209                 break;
1210         default:
1211                 wiphy_err(wiphy, "type not supported\n");
1212                 return ERR_PTR(-EINVAL);
1213         }
1214
1215         dev = alloc_netdev_mq(sizeof(struct mwifiex_private *), name,
1216                               ether_setup, 1);
1217         if (!dev) {
1218                 wiphy_err(wiphy, "no memory available for netdevice\n");
1219                 priv->bss_mode = NL80211_IFTYPE_UNSPECIFIED;
1220                 return ERR_PTR(-ENOMEM);
1221         }
1222
1223         dev_net_set(dev, wiphy_net(wiphy));
1224         dev->ieee80211_ptr = priv->wdev;
1225         dev->ieee80211_ptr->iftype = priv->bss_mode;
1226         memcpy(dev->dev_addr, wiphy->perm_addr, ETH_ALEN);
1227         memcpy(dev->perm_addr, wiphy->perm_addr, ETH_ALEN);
1228         SET_NETDEV_DEV(dev, wiphy_dev(wiphy));
1229
1230         dev->flags |= IFF_BROADCAST | IFF_MULTICAST;
1231         dev->watchdog_timeo = MWIFIEX_DEFAULT_WATCHDOG_TIMEOUT;
1232         dev->hard_header_len += MWIFIEX_MIN_DATA_HEADER_LEN;
1233
1234         mdev_priv = netdev_priv(dev);
1235         *((unsigned long *) mdev_priv) = (unsigned long) priv;
1236
1237         priv->netdev = dev;
1238         mwifiex_init_priv_params(priv, dev);
1239
1240         SET_NETDEV_DEV(dev, adapter->dev);
1241
1242         /* Register network device */
1243         if (register_netdevice(dev)) {
1244                 wiphy_err(wiphy, "cannot register virtual network device\n");
1245                 free_netdev(dev);
1246                 priv->bss_mode = NL80211_IFTYPE_UNSPECIFIED;
1247                 return ERR_PTR(-EFAULT);
1248         }
1249
1250         sema_init(&priv->async_sem, 1);
1251         priv->scan_pending_on_block = false;
1252
1253         dev_dbg(adapter->dev, "info: %s: Marvell 802.11 Adapter\n", dev->name);
1254
1255 #ifdef CONFIG_DEBUG_FS
1256         mwifiex_dev_debugfs_init(priv);
1257 #endif
1258         return dev;
1259 }
1260 EXPORT_SYMBOL_GPL(mwifiex_add_virtual_intf);
1261
1262 /*
1263  * del_virtual_intf: remove the virtual interface determined by dev
1264  */
1265 int mwifiex_del_virtual_intf(struct wiphy *wiphy, struct net_device *dev)
1266 {
1267         struct mwifiex_private *priv = mwifiex_cfg80211_get_priv(wiphy);
1268
1269         if (!priv || !dev)
1270                 return 0;
1271
1272 #ifdef CONFIG_DEBUG_FS
1273         mwifiex_dev_debugfs_remove(priv);
1274 #endif
1275
1276         if (!netif_queue_stopped(priv->netdev))
1277                 netif_stop_queue(priv->netdev);
1278
1279         if (netif_carrier_ok(priv->netdev))
1280                 netif_carrier_off(priv->netdev);
1281
1282         if (dev->reg_state == NETREG_REGISTERED)
1283                 unregister_netdevice(dev);
1284
1285         /* Clear the priv in adapter */
1286         priv->netdev = NULL;
1287
1288         priv->media_connected = false;
1289
1290         cancel_work_sync(&priv->cfg_workqueue);
1291         flush_workqueue(priv->workqueue);
1292         destroy_workqueue(priv->workqueue);
1293
1294         priv->bss_mode = NL80211_IFTYPE_UNSPECIFIED;
1295
1296         return 0;
1297 }
1298 EXPORT_SYMBOL_GPL(mwifiex_del_virtual_intf);
1299
1300 /* station cfg80211 operations */
1301 static struct cfg80211_ops mwifiex_cfg80211_ops = {
1302         .add_virtual_intf = mwifiex_add_virtual_intf,
1303         .del_virtual_intf = mwifiex_del_virtual_intf,
1304         .change_virtual_intf = mwifiex_cfg80211_change_virtual_intf,
1305         .scan = mwifiex_cfg80211_scan,
1306         .connect = mwifiex_cfg80211_connect,
1307         .disconnect = mwifiex_cfg80211_disconnect,
1308         .get_station = mwifiex_cfg80211_get_station,
1309         .set_wiphy_params = mwifiex_cfg80211_set_wiphy_params,
1310         .set_channel = mwifiex_cfg80211_set_channel,
1311         .join_ibss = mwifiex_cfg80211_join_ibss,
1312         .leave_ibss = mwifiex_cfg80211_leave_ibss,
1313         .add_key = mwifiex_cfg80211_add_key,
1314         .del_key = mwifiex_cfg80211_del_key,
1315         .set_default_key = mwifiex_cfg80211_set_default_key,
1316         .set_power_mgmt = mwifiex_cfg80211_set_power_mgmt,
1317         .set_tx_power = mwifiex_cfg80211_set_tx_power,
1318         .set_bitrate_mask = mwifiex_cfg80211_set_bitrate_mask,
1319 };
1320
1321 /*
1322  * This function registers the device with CFG802.11 subsystem.
1323  *
1324  * The function creates the wireless device/wiphy, populates it with
1325  * default parameters and handler function pointers, and finally
1326  * registers the device.
1327  */
1328 int mwifiex_register_cfg80211(struct mwifiex_private *priv)
1329 {
1330         int ret;
1331         void *wdev_priv;
1332         struct wireless_dev *wdev;
1333
1334         wdev = kzalloc(sizeof(struct wireless_dev), GFP_KERNEL);
1335         if (!wdev) {
1336                 dev_err(priv->adapter->dev, "%s: allocating wireless device\n",
1337                                                 __func__);
1338                 return -ENOMEM;
1339         }
1340         wdev->wiphy =
1341                 wiphy_new(&mwifiex_cfg80211_ops,
1342                           sizeof(struct mwifiex_private *));
1343         if (!wdev->wiphy) {
1344                 kfree(wdev);
1345                 return -ENOMEM;
1346         }
1347         wdev->iftype = NL80211_IFTYPE_STATION;
1348         wdev->wiphy->max_scan_ssids = 10;
1349         wdev->wiphy->interface_modes =
1350                 BIT(NL80211_IFTYPE_STATION) | BIT(NL80211_IFTYPE_ADHOC);
1351
1352         wdev->wiphy->bands[IEEE80211_BAND_2GHZ] = &mwifiex_band_2ghz;
1353         mwifiex_setup_ht_caps(
1354                 &wdev->wiphy->bands[IEEE80211_BAND_2GHZ]->ht_cap, priv);
1355
1356         if (priv->adapter->config_bands & BAND_A) {
1357                 wdev->wiphy->bands[IEEE80211_BAND_5GHZ] = &mwifiex_band_5ghz;
1358                 mwifiex_setup_ht_caps(
1359                         &wdev->wiphy->bands[IEEE80211_BAND_5GHZ]->ht_cap, priv);
1360         } else {
1361                 wdev->wiphy->bands[IEEE80211_BAND_5GHZ] = NULL;
1362         }
1363
1364         /* Initialize cipher suits */
1365         wdev->wiphy->cipher_suites = mwifiex_cipher_suites;
1366         wdev->wiphy->n_cipher_suites = ARRAY_SIZE(mwifiex_cipher_suites);
1367
1368         memcpy(wdev->wiphy->perm_addr, priv->curr_addr, ETH_ALEN);
1369         wdev->wiphy->signal_type = CFG80211_SIGNAL_TYPE_MBM;
1370
1371         /* We are using custom domains */
1372         wdev->wiphy->flags |= WIPHY_FLAG_CUSTOM_REGULATORY;
1373
1374         /* Reserve space for bss band information */
1375         wdev->wiphy->bss_priv_size = sizeof(u8);
1376
1377         wdev->wiphy->reg_notifier = mwifiex_reg_notifier;
1378
1379         /* Set struct mwifiex_private pointer in wiphy_priv */
1380         wdev_priv = wiphy_priv(wdev->wiphy);
1381
1382         *(unsigned long *) wdev_priv = (unsigned long) priv;
1383
1384         set_wiphy_dev(wdev->wiphy, (struct device *) priv->adapter->dev);
1385
1386         ret = wiphy_register(wdev->wiphy);
1387         if (ret < 0) {
1388                 dev_err(priv->adapter->dev, "%s: registering cfg80211 device\n",
1389                                                 __func__);
1390                 wiphy_free(wdev->wiphy);
1391                 kfree(wdev);
1392                 return ret;
1393         } else {
1394                 dev_dbg(priv->adapter->dev,
1395                                 "info: successfully registered wiphy device\n");
1396         }
1397
1398         priv->wdev = wdev;
1399
1400         return ret;
1401 }
1402
1403 /*
1404  * This function handles the result of different pending network operations.
1405  *
1406  * The following operations are handled and CFG802.11 subsystem is
1407  * notified accordingly -
1408  *      - Scan request completion
1409  *      - Association request completion
1410  *      - IBSS join request completion
1411  *      - Disconnect request completion
1412  */
1413 void
1414 mwifiex_cfg80211_results(struct work_struct *work)
1415 {
1416         struct mwifiex_private *priv =
1417                 container_of(work, struct mwifiex_private, cfg_workqueue);
1418         struct mwifiex_user_scan_cfg *scan_req;
1419         int ret = 0, i;
1420         struct ieee80211_channel *chan;
1421
1422         if (priv->scan_request) {
1423                 scan_req = kzalloc(sizeof(struct mwifiex_user_scan_cfg),
1424                                    GFP_KERNEL);
1425                 if (!scan_req) {
1426                         dev_err(priv->adapter->dev, "failed to alloc "
1427                                                     "scan_req\n");
1428                         return;
1429                 }
1430                 for (i = 0; i < priv->scan_request->n_ssids; i++) {
1431                         memcpy(scan_req->ssid_list[i].ssid,
1432                                         priv->scan_request->ssids[i].ssid,
1433                                         priv->scan_request->ssids[i].ssid_len);
1434                         scan_req->ssid_list[i].max_len =
1435                                         priv->scan_request->ssids[i].ssid_len;
1436                 }
1437                 for (i = 0; i < priv->scan_request->n_channels; i++) {
1438                         chan = priv->scan_request->channels[i];
1439                         scan_req->chan_list[i].chan_number = chan->hw_value;
1440                         scan_req->chan_list[i].radio_type = chan->band;
1441                         if (chan->flags & IEEE80211_CHAN_DISABLED)
1442                                 scan_req->chan_list[i].scan_type =
1443                                         MWIFIEX_SCAN_TYPE_PASSIVE;
1444                         else
1445                                 scan_req->chan_list[i].scan_type =
1446                                         MWIFIEX_SCAN_TYPE_ACTIVE;
1447                         scan_req->chan_list[i].scan_time = 0;
1448                 }
1449                 if (mwifiex_set_user_scan_ioctl(priv, scan_req))
1450                         ret = -EFAULT;
1451                 priv->scan_result_status = ret;
1452                 dev_dbg(priv->adapter->dev, "info: %s: sending scan results\n",
1453                                                         __func__);
1454                 cfg80211_scan_done(priv->scan_request,
1455                                 (priv->scan_result_status < 0));
1456                 priv->scan_request = NULL;
1457                 kfree(scan_req);
1458         }
1459
1460         if (priv->assoc_request == 1) {
1461                 if (!priv->assoc_result) {
1462                         cfg80211_connect_result(priv->netdev, priv->cfg_bssid,
1463                                                 NULL, 0, NULL, 0,
1464                                                 WLAN_STATUS_SUCCESS,
1465                                                 GFP_KERNEL);
1466                         dev_dbg(priv->adapter->dev,
1467                                 "info: associated to bssid %pM successfully\n",
1468                                priv->cfg_bssid);
1469                 } else {
1470                         dev_dbg(priv->adapter->dev,
1471                                 "info: association to bssid %pM failed\n",
1472                                priv->cfg_bssid);
1473                         memset(priv->cfg_bssid, 0, ETH_ALEN);
1474                 }
1475                 priv->assoc_request = 0;
1476                 priv->assoc_result = 0;
1477         }
1478
1479         if (priv->ibss_join_request == 1) {
1480                 if (!priv->ibss_join_result) {
1481                         cfg80211_ibss_joined(priv->netdev, priv->cfg_bssid,
1482                                              GFP_KERNEL);
1483                         dev_dbg(priv->adapter->dev,
1484                                 "info: joined/created adhoc network with bssid"
1485                                         " %pM successfully\n", priv->cfg_bssid);
1486                 } else {
1487                         dev_dbg(priv->adapter->dev,
1488                                 "info: failed creating/joining adhoc network\n");
1489                 }
1490                 priv->ibss_join_request = 0;
1491                 priv->ibss_join_result = 0;
1492         }
1493
1494         if (priv->disconnect) {
1495                 memset(priv->cfg_bssid, 0, ETH_ALEN);
1496                 priv->disconnect = 0;
1497         }
1498 }