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         int channel;
  38         switch (channel_type) {
  39         case NL80211_CHAN_NO_HT:
  40         case NL80211_CHAN_HT20:
  41                 channel = NO_SEC_CHANNEL;
  42                 break;
  43         case NL80211_CHAN_HT40PLUS:
  44                 channel = SEC_CHANNEL_ABOVE;
  45                 break;
  46         case NL80211_CHAN_HT40MINUS:
  47                 channel = SEC_CHANNEL_BELOW;
  48                 break;
  49         default:
  50                 channel = NO_SEC_CHANNEL;
  51         }
  52         return channel;
  53 }
  54
  55 /*
  56  * This function maps the driver channel type into nl802.11 channel type.
  57  *
  58  * The mapping is as follows -
  59  *      NO_SEC_CHANNEL      -> NL80211_CHAN_HT20
  60  *      SEC_CHANNEL_ABOVE   -> NL80211_CHAN_HT40PLUS
  61  *      SEC_CHANNEL_BELOW   -> NL80211_CHAN_HT40MINUS
  62  *      Others              -> NL80211_CHAN_HT20
  63  */
  64 static enum nl80211_channel_type
  65 mwifiex_channels_to_cfg80211_channel_type(int channel_type)
  66 {
  67         int channel;
  68         switch (channel_type) {
  69         case NO_SEC_CHANNEL:
  70                 channel = NL80211_CHAN_HT20;
  71                 break;
  72         case SEC_CHANNEL_ABOVE:
  73                 channel = NL80211_CHAN_HT40PLUS;
  74                 break;
  75         case SEC_CHANNEL_BELOW:
  76                 channel = NL80211_CHAN_HT40MINUS;
  77                 break;
  78         default:
  79                 channel = NL80211_CHAN_HT20;
  80         }
  81         return channel;
  82 }
  83
  84 /*
  85  * This function checks whether WEP is set.
  86  */
  87 static int
  88 mwifiex_is_alg_wep(u32 cipher)
  89 {
  90         int alg = 0;
  91
  92         switch (cipher) {
  93         case MWIFIEX_ENCRYPTION_MODE_WEP40:
  94         case MWIFIEX_ENCRYPTION_MODE_WEP104:
  95                 alg = 1;
  96                 break;
  97         default:
  98                 alg = 0;
  99                 break;
 100         }
 101         return alg;
 102 }
 103
 104 /*
 105  * This function maps the given cipher type into driver specific type.
 106  *
 107  * It also sets a flag to indicate whether WPA is enabled or not.
 108  *
 109  * The mapping table is -
 110  *      Input cipher                Driver cipher type              WPA enabled?
 111  *      ------------                ------------------              ------------
 112  *      IW_AUTH_CIPHER_NONE         MWIFIEX_ENCRYPTION_MODE_NONE    No
 113  *      WLAN_CIPHER_SUITE_WEP40     MWIFIEX_ENCRYPTION_MODE_WEP40   No
 114  *      WLAN_CIPHER_SUITE_WEP104    MWIFIEX_ENCRYPTION_MODE_WEP104  No
 115  *      WLAN_CIPHER_SUITE_TKIP      MWIFIEX_ENCRYPTION_MODE_TKIP    Yes
 116  *      WLAN_CIPHER_SUITE_CCMP      MWIFIEX_ENCRYPTION_MODE_CCMP    Yes
 117  *      Others                      -1                              No
 118  */
 119 static int
 120 mwifiex_get_mwifiex_cipher(u32 cipher, int *wpa_enabled)
 121 {
 122         int encrypt_mode;
 123
 124         if (wpa_enabled)
 125                 *wpa_enabled = 0;
 126         switch (cipher) {
 127         case IW_AUTH_CIPHER_NONE:
 128                 encrypt_mode = MWIFIEX_ENCRYPTION_MODE_NONE;
 129                 break;
 130         case WLAN_CIPHER_SUITE_WEP40:
 131                 encrypt_mode = MWIFIEX_ENCRYPTION_MODE_WEP40;
 132                 break;
 133         case WLAN_CIPHER_SUITE_WEP104:
 134                 encrypt_mode = MWIFIEX_ENCRYPTION_MODE_WEP104;
 135                 break;
 136         case WLAN_CIPHER_SUITE_TKIP:
 137                 encrypt_mode = MWIFIEX_ENCRYPTION_MODE_TKIP;
 138                 if (wpa_enabled)
 139                         *wpa_enabled = 1;
 140                 break;
 141         case WLAN_CIPHER_SUITE_CCMP:
 142                 encrypt_mode = MWIFIEX_ENCRYPTION_MODE_CCMP;
 143                 if (wpa_enabled)
 144                         *wpa_enabled = 1;
 145                 break;
 146         default:
 147                 encrypt_mode = -1;
 148         }
 149
 150         return encrypt_mode;
 151 }
 152
 153 /*
 154  * This function retrieves the private structure from kernel wiphy structure.
 155  */
 156 static void *mwifiex_cfg80211_get_priv(struct wiphy *wiphy)
 157 {
 158         return (void *) (*(unsigned long *) wiphy_priv(wiphy));
 159 }
 160
 161 /*
 162  * CFG802.11 operation handler to delete a network key.
 163  */
 164 static int
 165 mwifiex_cfg80211_del_key(struct wiphy *wiphy, struct net_device *netdev,
 166                          u8 key_index, bool pairwise, const u8 *mac_addr)
 167 {
 168         struct mwifiex_private *priv = mwifiex_cfg80211_get_priv(wiphy);
 169         int ret = 0;
 170
 171         ret = mwifiex_set_encode(priv, NULL, 0, key_index, 1);
 172         if (ret) {
 173                 wiphy_err(wiphy, "deleting the crypto keys\n");
 174                 return -EFAULT;
 175         }
 176
 177         wiphy_dbg(wiphy, "info: crypto keys deleted\n");
 178         return 0;
 179 }
 180
 181 /*
 182  * CFG802.11 operation handler to set Tx power.
 183  */
 184 static int
 185 mwifiex_cfg80211_set_tx_power(struct wiphy *wiphy,
 186                               enum nl80211_tx_power_setting type,
 187                               int dbm)
 188 {
 189         int ret = 0;
 190         struct mwifiex_private *priv = mwifiex_cfg80211_get_priv(wiphy);
 191
 192         ret = mwifiex_set_tx_power(priv, type, dbm);
 193
 194         return ret;
 195 }
 196
 197 /*
 198  * CFG802.11 operation handler to set Power Save option.
 199  *
 200  * The timeout value, if provided, is currently ignored.
 201  */
 202 static int
 203 mwifiex_cfg80211_set_power_mgmt(struct wiphy *wiphy,
 204                                 struct net_device *dev,
 205                                 bool enabled, int timeout)
 206 {
 207         int ret = 0;
 208         struct mwifiex_private *priv = mwifiex_cfg80211_get_priv(wiphy);
 209
 210         if (timeout)
 211                 wiphy_dbg(wiphy,
 212                         "info: ignoring the timeout value"
 213                         " for IEEE power save\n");
 214
 215         ret = mwifiex_drv_set_power(priv, enabled);
 216
 217         return ret;
 218 }
 219
 220 /*
 221  * CFG802.11 operation handler to set the default network key.
 222  */
 223 static int
 224 mwifiex_cfg80211_set_default_key(struct wiphy *wiphy, struct net_device *netdev,
 225                                  u8 key_index, bool unicast,
 226                                  bool multicast)
 227 {
 228         struct mwifiex_private *priv = mwifiex_cfg80211_get_priv(wiphy);
 229         int ret;
 230
 231         ret = mwifiex_set_encode(priv, NULL, 0, key_index, 0);
 232
 233         wiphy_dbg(wiphy, "info: set default Tx key index\n");
 234
 235         if (ret)
 236                 return -EFAULT;
 237
 238         return 0;
 239 }
 240
 241 /*
 242  * CFG802.11 operation handler to add a network key.
 243  */
 244 static int
 245 mwifiex_cfg80211_add_key(struct wiphy *wiphy, struct net_device *netdev,
 246                          u8 key_index, bool pairwise, const u8 *mac_addr,
 247                          struct key_params *params)
 248 {
 249         struct mwifiex_private *priv = mwifiex_cfg80211_get_priv(wiphy);
 250         int ret = 0;
 251         int encrypt_mode;
 252
 253         encrypt_mode = mwifiex_get_mwifiex_cipher(params->cipher, NULL);
 254
 255         if (encrypt_mode != -1)
 256                 ret = mwifiex_set_encode(priv, params->key, params->key_len,
 257                                                 key_index, 0);
 258
 259         wiphy_dbg(wiphy, "info: crypto keys added\n");
 260
 261         if (ret)
 262                 return -EFAULT;
 263
 264         return 0;
 265 }
 266
 267 /*
 268  * This function sends domain information to the firmware.
 269  *
 270  * The following information are passed to the firmware -
 271  *      - Country codes
 272  *      - Sub bands (first channel, number of channels, maximum Tx power)
 273  */
 274 static int mwifiex_send_domain_info_cmd_fw(struct wiphy *wiphy)
 275 {
 276         u8 no_of_triplet = 0;
 277         struct ieee80211_country_ie_triplet *t;
 278         u8 no_of_parsed_chan = 0;
 279         u8 first_chan = 0, next_chan = 0, max_pwr = 0;
 280         u8 i, flag = 0;
 281         enum ieee80211_band band;
 282         struct ieee80211_supported_band *sband;
 283         struct ieee80211_channel *ch;
 284         struct mwifiex_private *priv = mwifiex_cfg80211_get_priv(wiphy);
 285         struct mwifiex_adapter *adapter = priv->adapter;
 286         struct mwifiex_802_11d_domain_reg *domain_info = &adapter->domain_reg;
 287         int ret = 0;
 288
 289         /* Set country code */
 290         domain_info->country_code[0] = priv->country_code[0];
 291         domain_info->country_code[1] = priv->country_code[1];
 292         domain_info->country_code[2] = ' ';
 293
 294         band = mwifiex_band_to_radio_type(adapter->config_bands);
 295         if (!wiphy->bands[band]) {
 296                 wiphy_err(wiphy, "11D: setting domain info in FW\n");
 297                 return -1;
 298         }
 299
 300         sband = wiphy->bands[band];
 301
 302         for (i = 0; i < sband->n_channels ; i++) {
 303                 ch = &sband->channels[i];
 304                 if (ch->flags & IEEE80211_CHAN_DISABLED)
 305                         continue;
 306
 307                 if (!flag) {
 308                         flag = 1;
 309                         first_chan = (u32) ch->hw_value;
 310                         next_chan = first_chan;
 311                         max_pwr = ch->max_power;
 312                         no_of_parsed_chan = 1;
 313                         continue;
 314                 }
 315
 316                 if (ch->hw_value == next_chan + 1 &&
 317                                 ch->max_power == max_pwr) {
 318                         next_chan++;
 319                         no_of_parsed_chan++;
 320                 } else {
 321                         t = &domain_info->triplet[no_of_triplet];
 322                         t->chans.first_channel = first_chan;
 323                         t->chans.num_channels = no_of_parsed_chan;
 324                         t->chans.max_power = max_pwr;
 325                         no_of_triplet++;
 326                         first_chan = (u32) ch->hw_value;
 327                         next_chan = first_chan;
 328                         max_pwr = ch->max_power;
 329                         no_of_parsed_chan = 1;
 330                 }
 331         }
 332
 333         if (flag) {
 334                 t = &domain_info->triplet[no_of_triplet];
 335                 t->chans.first_channel = first_chan;
 336                 t->chans.num_channels = no_of_parsed_chan;
 337                 t->chans.max_power = max_pwr;
 338                 no_of_triplet++;
 339         }
 340
 341         domain_info->no_of_triplet = no_of_triplet;
 342         /* Send cmd to FW to set domain info */
 343         ret = mwifiex_prepare_cmd(priv, HostCmd_CMD_802_11D_DOMAIN_INFO,
 344                                   HostCmd_ACT_GEN_SET, 0, NULL, NULL);
 345         if (ret)
 346                 wiphy_err(wiphy, "11D: setting domain info in FW\n");
 347
 348         return ret;
 349 }
 350
 351 /*
 352  * CFG802.11 regulatory domain callback function.
 353  *
 354  * This function is called when the regulatory domain is changed due to the
 355  * following reasons -
 356  *      - Set by driver
 357  *      - Set by system core
 358  *      - Set by user
 359  *      - Set bt Country IE
 360  */
 361 static int mwifiex_reg_notifier(struct wiphy *wiphy,
 362                 struct regulatory_request *request)
 363 {
 364         struct mwifiex_private *priv = mwifiex_cfg80211_get_priv(wiphy);
 365
 366         wiphy_dbg(wiphy, "info: cfg80211 regulatory domain callback for domain"
 367                         " %c%c\n", request->alpha2[0], request->alpha2[1]);
 368
 369         memcpy(priv->country_code, request->alpha2, sizeof(request->alpha2));
 370
 371         switch (request->initiator) {
 372         case NL80211_REGDOM_SET_BY_DRIVER:
 373         case NL80211_REGDOM_SET_BY_CORE:
 374         case NL80211_REGDOM_SET_BY_USER:
 375                 break;
 376                 /* Todo: apply driver specific changes in channel flags based
 377                    on the request initiator if necessary. */
 378         case NL80211_REGDOM_SET_BY_COUNTRY_IE:
 379                 break;
 380         }
 381         mwifiex_send_domain_info_cmd_fw(wiphy);
 382
 383         return 0;
 384 }
 385
 386 /*
 387  * This function sets the RF channel.
 388  *
 389  * This function creates multiple IOCTL requests, populates them accordingly
 390  * and issues them to set the band/channel and frequency.
 391  */
 392 static int
 393 mwifiex_set_rf_channel(struct mwifiex_private *priv,
 394                        struct ieee80211_channel *chan,
 395                        enum nl80211_channel_type channel_type)
 396 {
 397         struct mwifiex_chan_freq_power cfp;
 398         int ret = 0;
 399         int status = 0;
 400         struct mwifiex_ds_band_cfg band_cfg;
 401         u32 config_bands = 0;
 402         struct wiphy *wiphy = priv->wdev->wiphy;
 403
 404         if (chan) {
 405                 memset(&band_cfg, 0, sizeof(band_cfg));
 406                 /* Set appropriate bands */
 407                 if (chan->band == IEEE80211_BAND_2GHZ)
 408                         config_bands = BAND_B | BAND_G | BAND_GN;
 409                 else
 410                         config_bands = BAND_AN | BAND_A;
 411                 if (priv->bss_mode == NL80211_IFTYPE_STATION
 412                     || priv->bss_mode == NL80211_IFTYPE_UNSPECIFIED) {
 413                         band_cfg.config_bands = config_bands;
 414                 } else if (priv->bss_mode == NL80211_IFTYPE_ADHOC) {
 415                         band_cfg.config_bands = config_bands;
 416                         band_cfg.adhoc_start_band = config_bands;
 417                 }
 418                 /* Set channel offset */
 419                 band_cfg.sec_chan_offset =
 420                         mwifiex_cfg80211_channel_type_to_mwifiex_channels
 421                         (channel_type);
 422                 status = mwifiex_radio_ioctl_band_cfg(priv, HostCmd_ACT_GEN_SET,
 423                                                       &band_cfg);
 424
 425                 if (status)
 426                         return -EFAULT;
 427                 mwifiex_send_domain_info_cmd_fw(wiphy);
 428         }
 429
 430         wiphy_dbg(wiphy, "info: setting band %d, channel offset %d and "
 431                 "mode %d\n", config_bands, band_cfg.sec_chan_offset,
 432                 priv->bss_mode);
 433         if (!chan)
 434                 return ret;
 435
 436         memset(&cfp, 0, sizeof(cfp));
 437         cfp.freq = chan->center_freq;
 438         /* Convert frequency to channel */
 439         cfp.channel = ieee80211_frequency_to_channel(chan->center_freq);
 440
 441         status = mwifiex_bss_ioctl_channel(priv, HostCmd_ACT_GEN_SET, &cfp);
 442         if (status)
 443                 return -EFAULT;
 444
 445         ret = mwifiex_drv_change_adhoc_chan(priv, cfp.channel);
 446
 447         return ret;
 448 }
 449
 450 /*
 451  * CFG802.11 operation handler to set channel.
 452  *
 453  * This function can only be used when station is not connected.
 454  */
 455 static int
 456 mwifiex_cfg80211_set_channel(struct wiphy *wiphy, struct net_device *dev,
 457                              struct ieee80211_channel *chan,
 458                              enum nl80211_channel_type channel_type)
 459 {
 460         struct mwifiex_private *priv = mwifiex_cfg80211_get_priv(wiphy);
 461
 462         if (priv->media_connected) {
 463                 wiphy_err(wiphy, "This setting is valid only when station "
 464                                 "is not connected\n");
 465                 return -EINVAL;
 466         }
 467
 468         return mwifiex_set_rf_channel(priv, chan, channel_type);
 469 }
 470
 471 /*
 472  * This function sets the fragmentation threshold.
 473  *
 474  * This function creates an IOCTL request, populates it accordingly
 475  * and issues an IOCTL.
 476  *
 477  * The fragmentation threshold value must lies between MWIFIEX_FRAG_MIN_VALUE
 478  * and MWIFIEX_FRAG_MAX_VALUE.
 479  */
 480 static int
 481 mwifiex_set_frag(struct mwifiex_private *priv, u32 frag_thr)
 482 {
 483         int ret = 0;
 484         int status = 0;
 485         struct mwifiex_wait_queue *wait = NULL;
 486         u8 wait_option = MWIFIEX_IOCTL_WAIT;
 487
 488         if (frag_thr < MWIFIEX_FRAG_MIN_VALUE
 489             || frag_thr > MWIFIEX_FRAG_MAX_VALUE)
 490                 return -EINVAL;
 491
 492         wait = mwifiex_alloc_fill_wait_queue(priv, wait_option);
 493         if (!wait)
 494                 return -ENOMEM;
 495
 496         status = mwifiex_snmp_mib_ioctl(priv, wait, FRAG_THRESH_I,
 497                                         HostCmd_ACT_GEN_SET, &frag_thr);
 498
 499         if (mwifiex_request_ioctl(priv, wait, status, wait_option))
 500                 ret = -EFAULT;
 501
 502         kfree(wait);
 503         return ret;
 504 }
 505
 506 /*
 507  * This function sets the RTS threshold.
 508  *
 509  * This function creates an IOCTL request, populates it accordingly
 510  * and issues an IOCTL.
 511  */
 512 static int
 513 mwifiex_set_rts(struct mwifiex_private *priv, u32 rts_thr)
 514 {
 515         int ret = 0;
 516         struct mwifiex_wait_queue *wait = NULL;
 517         int status = 0;
 518         u8 wait_option = MWIFIEX_IOCTL_WAIT;
 519
 520         if (rts_thr < MWIFIEX_RTS_MIN_VALUE || rts_thr > MWIFIEX_RTS_MAX_VALUE)
 521                 rts_thr = MWIFIEX_RTS_MAX_VALUE;
 522
 523         wait = mwifiex_alloc_fill_wait_queue(priv, wait_option);
 524         if (!wait)
 525                 return -ENOMEM;
 526
 527         status = mwifiex_snmp_mib_ioctl(priv, wait, RTS_THRESH_I,
 528                                         HostCmd_ACT_GEN_SET, &rts_thr);
 529
 530         if (mwifiex_request_ioctl(priv, wait, status, wait_option))
 531                 ret = -EFAULT;
 532
 533         kfree(wait);
 534         return ret;
 535 }
 536
 537 /*
 538  * CFG802.11 operation handler to set wiphy parameters.
 539  *
 540  * This function can be used to set the RTS threshold and the
 541  * Fragmentation threshold of the driver.
 542  */
 543 static int
 544 mwifiex_cfg80211_set_wiphy_params(struct wiphy *wiphy, u32 changed)
 545 {
 546         struct mwifiex_private *priv = mwifiex_cfg80211_get_priv(wiphy);
 547
 548         int ret = 0;
 549
 550         if (changed & WIPHY_PARAM_RTS_THRESHOLD)
 551                 ret = mwifiex_set_rts(priv, wiphy->rts_threshold);
 552
 553         if (changed & WIPHY_PARAM_FRAG_THRESHOLD)
 554                 ret = mwifiex_set_frag(priv, wiphy->frag_threshold);
 555
 556         return ret;
 557 }
 558
 559 /*
 560  * CFG802.11 operation handler to change interface type.
 561  */
 562 static int
 563 mwifiex_cfg80211_change_virtual_intf(struct wiphy *wiphy,
 564                                      struct net_device *dev,
 565                                      enum nl80211_iftype type, u32 *flags,
 566                                      struct vif_params *params)
 567 {
 568         int ret = 0;
 569         struct mwifiex_private *priv = mwifiex_netdev_get_priv(dev);
 570         struct mwifiex_wait_queue *wait = NULL;
 571
 572         if (priv->bss_mode == type) {
 573                 wiphy_warn(wiphy, "already set to required type\n");
 574                 return 0;
 575         }
 576
 577         priv->bss_mode = type;
 578
 579         switch (type) {
 580         case NL80211_IFTYPE_ADHOC:
 581                 dev->ieee80211_ptr->iftype = NL80211_IFTYPE_ADHOC;
 582                 wiphy_dbg(wiphy, "info: setting interface type to adhoc\n");
 583                 break;
 584         case NL80211_IFTYPE_STATION:
 585                 dev->ieee80211_ptr->iftype = NL80211_IFTYPE_STATION;
 586                 wiphy_dbg(wiphy, "info: setting interface type to managed\n");
 587                 break;
 588         case NL80211_IFTYPE_UNSPECIFIED:
 589                 dev->ieee80211_ptr->iftype = NL80211_IFTYPE_STATION;
 590                 wiphy_dbg(wiphy, "info: setting interface type to auto\n");
 591                 return 0;
 592         default:
 593                 wiphy_err(wiphy, "unknown interface type: %d\n", type);
 594                 return -EINVAL;
 595         }
 596
 597         wait = mwifiex_alloc_fill_wait_queue(priv, MWIFIEX_IOCTL_WAIT);
 598         if (!wait)
 599                 return -ENOMEM;
 600
 601         mwifiex_deauthenticate(priv, wait, NULL);
 602
 603         priv->sec_info.authentication_mode = MWIFIEX_AUTH_MODE_OPEN;
 604
 605         ret = mwifiex_prepare_cmd(priv, HostCmd_CMD_SET_BSS_MODE,
 606                                   HostCmd_ACT_GEN_SET, 0, wait, NULL);
 607         if (!ret)
 608                 ret = -EINPROGRESS;
 609
 610         ret = mwifiex_request_ioctl(priv, wait, ret, MWIFIEX_IOCTL_WAIT);
 611         if (ret)
 612                 ret = -EFAULT;
 613
 614         kfree(wait);
 615         return ret;
 616 }
 617
 618 /*
 619  * This function dumps the station information on a buffer.
 620  *
 621  * The following information are shown -
 622  *      - Total bytes transmitted
 623  *      - Total bytes received
 624  *      - Total packets transmitted
 625  *      - Total packets received
 626  *      - Signal quality level
 627  *      - Transmission rate
 628  */
 629 static int
 630 mwifiex_dump_station_info(struct mwifiex_private *priv,
 631                           struct station_info *sinfo)
 632 {
 633         struct mwifiex_ds_get_signal signal;
 634         struct mwifiex_rate_cfg rate;
 635         int ret = 0;
 636
 637         sinfo->filled = STATION_INFO_RX_BYTES | STATION_INFO_TX_BYTES |
 638                 STATION_INFO_RX_PACKETS |
 639                 STATION_INFO_TX_PACKETS
 640                 | STATION_INFO_SIGNAL | STATION_INFO_TX_BITRATE;
 641
 642         /* Get signal information from the firmware */
 643         memset(&signal, 0, sizeof(struct mwifiex_ds_get_signal));
 644         if (mwifiex_get_signal_info(priv, MWIFIEX_IOCTL_WAIT, &signal)) {
 645                 dev_err(priv->adapter->dev, "getting signal information\n");
 646                 ret = -EFAULT;
 647         }
 648
 649         if (mwifiex_drv_get_data_rate(priv, &rate)) {
 650                 dev_err(priv->adapter->dev, "getting data rate\n");
 651                 ret = -EFAULT;
 652         }
 653
 654         sinfo->rx_bytes = priv->stats.rx_bytes;
 655         sinfo->tx_bytes = priv->stats.tx_bytes;
 656         sinfo->rx_packets = priv->stats.rx_packets;
 657         sinfo->tx_packets = priv->stats.tx_packets;
 658         sinfo->signal = priv->w_stats.qual.level;
 659         sinfo->txrate.legacy = rate.rate;
 660
 661         return ret;
 662 }
 663
 664 /*
 665  * CFG802.11 operation handler to get station information.
 666  *
 667  * This function only works in connected mode, and dumps the
 668  * requested station information, if available.
 669  */
 670 static int
 671 mwifiex_cfg80211_get_station(struct wiphy *wiphy, struct net_device *dev,
 672                              u8 *mac, struct station_info *sinfo)
 673 {
 674         struct mwifiex_private *priv = mwifiex_netdev_get_priv(dev);
 675         int ret = 0;
 676
 677         mwifiex_dump_station_info(priv, sinfo);
 678
 679         if (!priv->media_connected)
 680                 return -ENOENT;
 681         if (memcmp(mac, priv->cfg_bssid, ETH_ALEN))
 682                 return -ENOENT;
 683
 684
 685         ret = mwifiex_dump_station_info(priv, sinfo);
 686
 687         return ret;
 688 }
 689
 690 /* Supported rates to be advertised to the cfg80211 */
 691
 692 static struct ieee80211_rate mwifiex_rates[] = {
 693         {.bitrate = 10, .hw_value = 2, },
 694         {.bitrate = 20, .hw_value = 4, },
 695         {.bitrate = 55, .hw_value = 11, },
 696         {.bitrate = 110, .hw_value = 22, },
 697         {.bitrate = 220, .hw_value = 44, },
 698         {.bitrate = 60, .hw_value = 12, },
 699         {.bitrate = 90, .hw_value = 18, },
 700         {.bitrate = 120, .hw_value = 24, },
 701         {.bitrate = 180, .hw_value = 36, },
 702         {.bitrate = 240, .hw_value = 48, },
 703         {.bitrate = 360, .hw_value = 72, },
 704         {.bitrate = 480, .hw_value = 96, },
 705         {.bitrate = 540, .hw_value = 108, },
 706         {.bitrate = 720, .hw_value = 144, },
 707 };
 708
 709 /* Channel definitions to be advertised to cfg80211 */
 710
 711 static struct ieee80211_channel mwifiex_channels_2ghz[] = {
 712         {.center_freq = 2412, .hw_value = 1, },
 713         {.center_freq = 2417, .hw_value = 2, },
 714         {.center_freq = 2422, .hw_value = 3, },
 715         {.center_freq = 2427, .hw_value = 4, },
 716         {.center_freq = 2432, .hw_value = 5, },
 717         {.center_freq = 2437, .hw_value = 6, },
 718         {.center_freq = 2442, .hw_value = 7, },
 719         {.center_freq = 2447, .hw_value = 8, },
 720         {.center_freq = 2452, .hw_value = 9, },
 721         {.center_freq = 2457, .hw_value = 10, },
 722         {.center_freq = 2462, .hw_value = 11, },
 723         {.center_freq = 2467, .hw_value = 12, },
 724         {.center_freq = 2472, .hw_value = 13, },
 725         {.center_freq = 2484, .hw_value = 14, },
 726 };
 727
 728 static struct ieee80211_supported_band mwifiex_band_2ghz = {
 729         .channels = mwifiex_channels_2ghz,
 730         .n_channels = ARRAY_SIZE(mwifiex_channels_2ghz),
 731         .bitrates = mwifiex_rates,
 732         .n_bitrates = 14,
 733 };
 734
 735 static struct ieee80211_channel mwifiex_channels_5ghz[] = {
 736         {.center_freq = 5040, .hw_value = 8, },
 737         {.center_freq = 5060, .hw_value = 12, },
 738         {.center_freq = 5080, .hw_value = 16, },
 739         {.center_freq = 5170, .hw_value = 34, },
 740         {.center_freq = 5190, .hw_value = 38, },
 741         {.center_freq = 5210, .hw_value = 42, },
 742         {.center_freq = 5230, .hw_value = 46, },
 743         {.center_freq = 5180, .hw_value = 36, },
 744         {.center_freq = 5200, .hw_value = 40, },
 745         {.center_freq = 5220, .hw_value = 44, },
 746         {.center_freq = 5240, .hw_value = 48, },
 747         {.center_freq = 5260, .hw_value = 52, },
 748         {.center_freq = 5280, .hw_value = 56, },
 749         {.center_freq = 5300, .hw_value = 60, },
 750         {.center_freq = 5320, .hw_value = 64, },
 751         {.center_freq = 5500, .hw_value = 100, },
 752         {.center_freq = 5520, .hw_value = 104, },
 753         {.center_freq = 5540, .hw_value = 108, },
 754         {.center_freq = 5560, .hw_value = 112, },
 755         {.center_freq = 5580, .hw_value = 116, },
 756         {.center_freq = 5600, .hw_value = 120, },
 757         {.center_freq = 5620, .hw_value = 124, },
 758         {.center_freq = 5640, .hw_value = 128, },
 759         {.center_freq = 5660, .hw_value = 132, },
 760         {.center_freq = 5680, .hw_value = 136, },
 761         {.center_freq = 5700, .hw_value = 140, },
 762         {.center_freq = 5745, .hw_value = 149, },
 763         {.center_freq = 5765, .hw_value = 153, },
 764         {.center_freq = 5785, .hw_value = 157, },
 765         {.center_freq = 5805, .hw_value = 161, },
 766         {.center_freq = 5825, .hw_value = 165, },
 767 };
 768
 769 static struct ieee80211_supported_band mwifiex_band_5ghz = {
 770         .channels = mwifiex_channels_5ghz,
 771         .n_channels = ARRAY_SIZE(mwifiex_channels_5ghz),
 772         .bitrates = mwifiex_rates - 4,
 773         .n_bitrates = ARRAY_SIZE(mwifiex_rates) + 4,
 774 };
 775
 776
 777 /* Supported crypto cipher suits to be advertised to cfg80211 */
 778
 779 static const u32 mwifiex_cipher_suites[] = {
 780         WLAN_CIPHER_SUITE_WEP40,
 781         WLAN_CIPHER_SUITE_WEP104,
 782         WLAN_CIPHER_SUITE_TKIP,
 783         WLAN_CIPHER_SUITE_CCMP,
 784 };
 785
 786 /*
 787  * CFG802.11 operation handler for disconnection request.
 788  *
 789  * This function does not work when there is already a disconnection
 790  * procedure going on.
 791  */
 792 static int
 793 mwifiex_cfg80211_disconnect(struct wiphy *wiphy, struct net_device *dev,
 794                             u16 reason_code)
 795 {
 796         struct mwifiex_private *priv = mwifiex_netdev_get_priv(dev);
 797
 798         if (priv->disconnect)
 799                 return -EBUSY;
 800
 801         priv->disconnect = 1;
 802         if (mwifiex_disconnect(priv, MWIFIEX_IOCTL_WAIT, NULL))
 803                 return -EFAULT;
 804
 805         wiphy_dbg(wiphy, "info: successfully disconnected from %pM:"
 806                 " reason code %d\n", priv->cfg_bssid, reason_code);
 807
 808         queue_work(priv->workqueue, &priv->cfg_workqueue);
 809
 810         return 0;
 811 }
 812
 813 /*
 814  * This function informs the CFG802.11 subsystem of a new IBSS.
 815  *
 816  * The following information are sent to the CFG802.11 subsystem
 817  * to register the new IBSS. If we do not register the new IBSS,
 818  * a kernel panic will result.
 819  *      - SSID
 820  *      - SSID length
 821  *      - BSSID
 822  *      - Channel
 823  */
 824 static int mwifiex_cfg80211_inform_ibss_bss(struct mwifiex_private *priv)
 825 {
 826         int ret = 0;
 827         struct ieee80211_channel *chan;
 828         struct mwifiex_bss_info bss_info;
 829         int ie_len = 0;
 830         u8 ie_buf[IEEE80211_MAX_SSID_LEN + sizeof(struct ieee_types_header)];
 831
 832         ret = mwifiex_get_bss_info(priv, &bss_info);
 833         if (ret)
 834                 return ret;
 835
 836         ie_buf[0] = WLAN_EID_SSID;
 837         ie_buf[1] = bss_info.ssid.ssid_len;
 838
 839         memcpy(&ie_buf[sizeof(struct ieee_types_header)],
 840                         &bss_info.ssid.ssid,
 841                         bss_info.ssid.ssid_len);
 842         ie_len = ie_buf[1] + sizeof(struct ieee_types_header);
 843
 844         chan = __ieee80211_get_channel(priv->wdev->wiphy,
 845                         ieee80211_channel_to_frequency(bss_info.bss_chan,
 846                                                 priv->curr_bss_params.band));
 847
 848         cfg80211_inform_bss(priv->wdev->wiphy, chan,
 849                 bss_info.bssid, 0, WLAN_CAPABILITY_IBSS,
 850                 0, ie_buf, ie_len, 0, GFP_KERNEL);
 851         memcpy(priv->cfg_bssid, bss_info.bssid, ETH_ALEN);
 852
 853         return ret;
 854 }
 855
 856 /*
 857  * This function informs the CFG802.11 subsystem of a new BSS connection.
 858  *
 859  * The following information are sent to the CFG802.11 subsystem
 860  * to register the new BSS connection. If we do not register the new BSS,
 861  * a kernel panic will result.
 862  *      - MAC address
 863  *      - Capabilities
 864  *      - Beacon period
 865  *      - RSSI value
 866  *      - Channel
 867  *      - Supported rates IE
 868  *      - Extended capabilities IE
 869  *      - DS parameter set IE
 870  *      - HT Capability IE
 871  *      - Vendor Specific IE (221)
 872  *      - WPA IE
 873  *      - RSN IE
 874  */
 875 static int mwifiex_inform_bss_from_scan_result(struct mwifiex_private *priv,
 876                                                struct mwifiex_802_11_ssid *ssid)
 877 {
 878         struct mwifiex_scan_resp scan_resp;
 879         struct mwifiex_bssdescriptor *scan_table;
 880         int i, j;
 881         struct ieee80211_channel *chan;
 882         u8 *ie, *tmp, *ie_buf;
 883         u32 ie_len;
 884         u64 ts = 0;
 885         u8 *beacon;
 886         int beacon_size;
 887         u8 element_id, element_len;
 888
 889         memset(&scan_resp, 0, sizeof(scan_resp));
 890         if (mwifiex_get_scan_table(priv, MWIFIEX_IOCTL_WAIT, &scan_resp))
 891                 return -EFAULT;
 892
 893 #define MAX_IE_BUF      2048
 894         ie_buf = kzalloc(MAX_IE_BUF, GFP_KERNEL);
 895         if (!ie_buf) {
 896                 dev_err(priv->adapter->dev, "%s: failed to alloc ie_buf\n",
 897                                                 __func__);
 898                 return -ENOMEM;
 899         }
 900
 901         scan_table = (struct mwifiex_bssdescriptor *) scan_resp.scan_table;
 902         for (i = 0; i < scan_resp.num_in_scan_table; i++) {
 903                 if (ssid) {
 904                         /* Inform specific BSS only */
 905                         if (memcmp(ssid->ssid, scan_table[i].ssid.ssid,
 906                                            ssid->ssid_len))
 907                                 continue;
 908                 }
 909                 memset(ie_buf, 0, MAX_IE_BUF);
 910                 ie_buf[0] = WLAN_EID_SSID;
 911                 ie_buf[1] = scan_table[i].ssid.ssid_len;
 912                 memcpy(&ie_buf[sizeof(struct ieee_types_header)],
 913                        scan_table[i].ssid.ssid, ie_buf[1]);
 914
 915                 ie = ie_buf + ie_buf[1] + sizeof(struct ieee_types_header);
 916                 ie_len = ie_buf[1] + sizeof(struct ieee_types_header);
 917
 918                 ie[0] = WLAN_EID_SUPP_RATES;
 919
 920                 for (j = 0; j < sizeof(scan_table[i].supported_rates); j++) {
 921                         if (!scan_table[i].supported_rates[j])
 922                                 break;
 923                         else
 924                                 ie[j + sizeof(struct ieee_types_header)] =
 925                                         scan_table[i].supported_rates[j];
 926                 }
 927
 928                 ie[1] = j;
 929                 ie_len += ie[1] + sizeof(struct ieee_types_header);
 930
 931                 beacon = scan_table[i].beacon_buf;
 932                 beacon_size = scan_table[i].beacon_buf_size;
 933
 934                 /* Skip time stamp, beacon interval and capability */
 935
 936                 if (beacon) {
 937                         beacon += sizeof(scan_table[i].beacon_period)
 938                                 + sizeof(scan_table[i].time_stamp) +
 939                                 +sizeof(scan_table[i].cap_info_bitmap);
 940
 941                         beacon_size -= sizeof(scan_table[i].beacon_period)
 942                                 + sizeof(scan_table[i].time_stamp)
 943                                 + sizeof(scan_table[i].cap_info_bitmap);
 944                 }
 945
 946                 while (beacon_size >= sizeof(struct ieee_types_header)) {
 947                         ie = ie_buf + ie_len;
 948                         element_id = *beacon;
 949                         element_len = *(beacon + 1);
 950                         if (beacon_size < (int) element_len +
 951                             sizeof(struct ieee_types_header)) {
 952                                 dev_err(priv->adapter->dev, "%s: in processing"
 953                                         " IE, bytes left < IE length\n",
 954                                         __func__);
 955                                 break;
 956                         }
 957                         switch (element_id) {
 958                         case WLAN_EID_EXT_CAPABILITY:
 959                         case WLAN_EID_DS_PARAMS:
 960                         case WLAN_EID_HT_CAPABILITY:
 961                         case WLAN_EID_VENDOR_SPECIFIC:
 962                         case WLAN_EID_RSN:
 963                         case WLAN_EID_BSS_AC_ACCESS_DELAY:
 964                                 ie[0] = element_id;
 965                                 ie[1] = element_len;
 966                                 tmp = (u8 *) beacon;
 967                                 memcpy(&ie[sizeof(struct ieee_types_header)],
 968                                        tmp + sizeof(struct ieee_types_header),
 969                                        element_len);
 970                                 ie_len += ie[1] +
 971                                         sizeof(struct ieee_types_header);
 972                                 break;
 973                         default:
 974                                 break;
 975                         }
 976                         beacon += element_len +
 977                                         sizeof(struct ieee_types_header);
 978                         beacon_size -= element_len +
 979                                         sizeof(struct ieee_types_header);
 980                 }
 981                 chan = ieee80211_get_channel(priv->wdev->wiphy,
 982                                                 scan_table[i].freq);
 983                 cfg80211_inform_bss(priv->wdev->wiphy, chan,
 984                                         scan_table[i].mac_address,
 985                                         ts, scan_table[i].cap_info_bitmap,
 986                                         scan_table[i].beacon_period,
 987                                         ie_buf, ie_len,
 988                                         scan_table[i].rssi, GFP_KERNEL);
 989         }
 990
 991         kfree(ie_buf);
 992         return 0;
 993 }
 994
 995 /*
 996  * This function connects with a BSS.
 997  *
 998  * This function handles both Infra and Ad-Hoc modes. It also performs
 999  * validity checking on the provided parameters, disconnects from the
1000  * current BSS (if any), sets up the association/scan parameters,
1001  * including security settings, and performs specific SSID scan before
1002  * trying to connect.
1003  *
1004  * For Infra mode, the function returns failure if the specified SSID
1005  * is not found in scan table. However, for Ad-Hoc mode, it can create
1006  * the IBSS if it does not exist. On successful completion in either case,
1007  * the function notifies the CFG802.11 subsystem of the new BSS connection,
1008  * otherwise the kernel will panic.
1009  */
1010 static int
1011 mwifiex_cfg80211_assoc(struct mwifiex_private *priv, size_t ssid_len, u8 *ssid,
1012                        u8 *bssid, int mode, struct ieee80211_channel *channel,
1013                        struct cfg80211_connect_params *sme, bool privacy)
1014 {
1015         struct mwifiex_802_11_ssid req_ssid;
1016         struct mwifiex_ssid_bssid ssid_bssid;
1017         int ret = 0;
1018         int auth_type = 0, pairwise_encrypt_mode = 0, wpa_enabled = 0;
1019         int group_encrypt_mode = 0;
1020         int alg_is_wep = 0;
1021
1022         memset(&req_ssid, 0, sizeof(struct mwifiex_802_11_ssid));
1023         memset(&ssid_bssid, 0, sizeof(struct mwifiex_ssid_bssid));
1024
1025         req_ssid.ssid_len = ssid_len;
1026         if (ssid_len > IEEE80211_MAX_SSID_LEN) {
1027                 dev_err(priv->adapter->dev, "invalid SSID - aborting\n");
1028                 return -EINVAL;
1029         }
1030
1031         memcpy(req_ssid.ssid, ssid, ssid_len);
1032         if (!req_ssid.ssid_len || req_ssid.ssid[0] < 0x20) {
1033                 dev_err(priv->adapter->dev, "invalid SSID - aborting\n");
1034                 return -EINVAL;
1035         }
1036
1037         /* disconnect before try to associate */
1038         mwifiex_disconnect(priv, MWIFIEX_IOCTL_WAIT, NULL);
1039
1040         if (channel)
1041                 ret = mwifiex_set_rf_channel(priv, channel,
1042                                 mwifiex_channels_to_cfg80211_channel_type
1043                                 (priv->adapter->chan_offset));
1044
1045         ret = mwifiex_set_encode(priv, NULL, 0, 0, 1);  /* Disable keys */
1046
1047         if (mode == NL80211_IFTYPE_ADHOC) {
1048                 /* "privacy" is set only for ad-hoc mode */
1049                 if (privacy) {
1050                         /*
1051                          * Keep MWIFIEX_ENCRYPTION_MODE_WEP104 for now so that
1052                          * the firmware can find a matching network from the
1053                          * scan. The cfg80211 does not give us the encryption
1054                          * mode at this stage so just setting it to WEP here.
1055                          */
1056                         priv->sec_info.encryption_mode =
1057                                         MWIFIEX_ENCRYPTION_MODE_WEP104;
1058                         priv->sec_info.authentication_mode =
1059                                         MWIFIEX_AUTH_MODE_OPEN;
1060                 }
1061
1062                 goto done;
1063         }
1064
1065         /* Now handle infra mode. "sme" is valid for infra mode only */
1066         if (sme->auth_type == NL80211_AUTHTYPE_AUTOMATIC
1067                         || sme->auth_type == NL80211_AUTHTYPE_OPEN_SYSTEM)
1068                 auth_type = MWIFIEX_AUTH_MODE_OPEN;
1069         else if (sme->auth_type == NL80211_AUTHTYPE_SHARED_KEY)
1070                 auth_type = MWIFIEX_AUTH_MODE_SHARED;
1071
1072         if (sme->crypto.n_ciphers_pairwise) {
1073                 pairwise_encrypt_mode = mwifiex_get_mwifiex_cipher(sme->crypto.
1074                                         ciphers_pairwise[0], &wpa_enabled);
1075                 priv->sec_info.encryption_mode = pairwise_encrypt_mode;
1076                 priv->sec_info.authentication_mode = auth_type;
1077         }
1078
1079         if (sme->crypto.cipher_group) {
1080                 group_encrypt_mode = mwifiex_get_mwifiex_cipher(sme->crypto.
1081                                                    cipher_group, &wpa_enabled);
1082                 priv->sec_info.encryption_mode = group_encrypt_mode;
1083                 priv->sec_info.authentication_mode = auth_type;
1084         }
1085         if (sme->ie)
1086                 ret = mwifiex_set_gen_ie(priv, sme->ie, sme->ie_len);
1087
1088         if (sme->key) {
1089                 alg_is_wep = mwifiex_is_alg_wep(pairwise_encrypt_mode)
1090                         | mwifiex_is_alg_wep(group_encrypt_mode);
1091                 if (alg_is_wep) {
1092                         dev_dbg(priv->adapter->dev,
1093                                 "info: setting wep encryption"
1094                                 " with key len %d\n", sme->key_len);
1095                         ret = mwifiex_set_encode(priv, sme->key, sme->key_len,
1096                                                         sme->key_idx, 0);
1097                 }
1098         }
1099 done:
1100         /* Do specific SSID scanning */
1101         if (mwifiex_request_scan(priv, MWIFIEX_IOCTL_WAIT, &req_ssid)) {
1102                 dev_err(priv->adapter->dev, "scan error\n");
1103                 return -EFAULT;
1104         }
1105
1106
1107         memcpy(&ssid_bssid.ssid, &req_ssid, sizeof(struct mwifiex_802_11_ssid));
1108
1109         if (mode != NL80211_IFTYPE_ADHOC) {
1110                 if (mwifiex_find_best_bss(priv, MWIFIEX_IOCTL_WAIT,
1111                                           &ssid_bssid))
1112                         return -EFAULT;
1113                 /* Inform the BSS information to kernel, otherwise
1114                  * kernel will give a panic after successful assoc */
1115                 if (mwifiex_inform_bss_from_scan_result(priv, &req_ssid))
1116                         return -EFAULT;
1117         }
1118
1119         dev_dbg(priv->adapter->dev, "info: trying to associate to %s and bssid %pM\n",
1120                (char *) req_ssid.ssid, ssid_bssid.bssid);
1121
1122         memcpy(&priv->cfg_bssid, ssid_bssid.bssid, 6);
1123
1124         /* Connect to BSS by ESSID */
1125         memset(&ssid_bssid.bssid, 0, ETH_ALEN);
1126
1127         if (mwifiex_bss_start(priv, MWIFIEX_IOCTL_WAIT, &ssid_bssid))
1128                 return -EFAULT;
1129
1130         if (mode == NL80211_IFTYPE_ADHOC) {
1131                 /* Inform the BSS information to kernel, otherwise
1132                  * kernel will give a panic after successful assoc */
1133                 if (mwifiex_cfg80211_inform_ibss_bss(priv))
1134                         return -EFAULT;
1135         }
1136
1137         return ret;
1138 }
1139
1140 /*
1141  * CFG802.11 operation handler for association request.
1142  *
1143  * This function does not work when the current mode is set to Ad-Hoc, or
1144  * when there is already an association procedure going on. The given BSS
1145  * information is used to associate.
1146  */
1147 static int
1148 mwifiex_cfg80211_connect(struct wiphy *wiphy, struct net_device *dev,
1149                          struct cfg80211_connect_params *sme)
1150 {
1151         struct mwifiex_private *priv = mwifiex_netdev_get_priv(dev);
1152         int ret = 0;
1153
1154         if (priv->assoc_request)
1155                 return -EBUSY;
1156
1157         if (priv->bss_mode == NL80211_IFTYPE_ADHOC) {
1158                 wiphy_err(wiphy, "received infra assoc request "
1159                                 "when station is in ibss mode\n");
1160                 goto done;
1161         }
1162
1163         priv->assoc_request = 1;
1164
1165         wiphy_dbg(wiphy, "info: Trying to associate to %s and bssid %pM\n",
1166                (char *) sme->ssid, sme->bssid);
1167
1168         ret = mwifiex_cfg80211_assoc(priv, sme->ssid_len, sme->ssid, sme->bssid,
1169                                      priv->bss_mode, sme->channel, sme, 0);
1170
1171 done:
1172         priv->assoc_result = ret;
1173         queue_work(priv->workqueue, &priv->cfg_workqueue);
1174         return ret;
1175 }
1176
1177 /*
1178  * CFG802.11 operation handler to join an IBSS.
1179  *
1180  * This function does not work in any mode other than Ad-Hoc, or if
1181  * a join operation is already in progress.
1182  */
1183 static int
1184 mwifiex_cfg80211_join_ibss(struct wiphy *wiphy, struct net_device *dev,
1185                            struct cfg80211_ibss_params *params)
1186 {
1187         struct mwifiex_private *priv = mwifiex_cfg80211_get_priv(wiphy);
1188         int ret = 0;
1189
1190         if (priv->ibss_join_request)
1191                 return -EBUSY;
1192
1193         if (priv->bss_mode != NL80211_IFTYPE_ADHOC) {
1194                 wiphy_err(wiphy, "request to join ibss received "
1195                                 "when station is not in ibss mode\n");
1196                 goto done;
1197         }
1198
1199         priv->ibss_join_request = 1;
1200
1201         wiphy_dbg(wiphy, "info: trying to join to %s and bssid %pM\n",
1202                (char *) params->ssid, params->bssid);
1203
1204         ret = mwifiex_cfg80211_assoc(priv, params->ssid_len, params->ssid,
1205                                 params->bssid, priv->bss_mode,
1206                                 params->channel, NULL, params->privacy);
1207 done:
1208         priv->ibss_join_result = ret;
1209         queue_work(priv->workqueue, &priv->cfg_workqueue);
1210         return ret;
1211 }
1212
1213 /*
1214  * CFG802.11 operation handler to leave an IBSS.
1215  *
1216  * This function does not work if a leave operation is
1217  * already in progress.
1218  */
1219 static int
1220 mwifiex_cfg80211_leave_ibss(struct wiphy *wiphy, struct net_device *dev)
1221 {
1222         struct mwifiex_private *priv = mwifiex_cfg80211_get_priv(wiphy);
1223
1224         if (priv->disconnect)
1225                 return -EBUSY;
1226
1227         priv->disconnect = 1;
1228
1229         wiphy_dbg(wiphy, "info: disconnecting from essid %pM\n",
1230                         priv->cfg_bssid);
1231         if (mwifiex_disconnect(priv, MWIFIEX_IOCTL_WAIT, NULL))
1232                 return -EFAULT;
1233
1234         queue_work(priv->workqueue, &priv->cfg_workqueue);
1235
1236         return 0;
1237 }
1238
1239 /*
1240  * CFG802.11 operation handler for scan request.
1241  *
1242  * This function issues a scan request to the firmware based upon
1243  * the user specified scan configuration. On successfull completion,
1244  * it also informs the results.
1245  */
1246 static int
1247 mwifiex_cfg80211_scan(struct wiphy *wiphy, struct net_device *dev,
1248                       struct cfg80211_scan_request *request)
1249 {
1250         struct mwifiex_private *priv = mwifiex_netdev_get_priv(dev);
1251
1252         wiphy_dbg(wiphy, "info: received scan request on %s\n", dev->name);
1253
1254         if (priv->scan_request && priv->scan_request != request)
1255                 return -EBUSY;
1256
1257         priv->scan_request = request;
1258
1259         queue_work(priv->workqueue, &priv->cfg_workqueue);
1260         return 0;
1261 }
1262
1263 /*
1264  * This function sets up the CFG802.11 specific HT capability fields
1265  * with default values.
1266  *
1267  * The following default values are set -
1268  *      - HT Supported = True
1269  *      - Maximum AMPDU length factor = 0x3
1270  *      - Minimum AMPDU spacing = 0x6
1271  *      - HT Capabilities map = IEEE80211_HT_CAP_SUP_WIDTH_20_40 (0x0002)
1272  *      - MCS information, Rx mask = 0xff
1273  *      - MCD information, Tx parameters = IEEE80211_HT_MCS_TX_DEFINED (0x01)
1274  */
1275 static void
1276 mwifiex_setup_ht_caps(struct ieee80211_sta_ht_cap *ht_info,
1277                       struct mwifiex_private *priv)
1278 {
1279         int rx_mcs_supp;
1280         struct ieee80211_mcs_info mcs_set;
1281         u8 *mcs = (u8 *)&mcs_set;
1282         struct mwifiex_adapter *adapter = priv->adapter;
1283
1284         ht_info->ht_supported = true;
1285         ht_info->ampdu_factor = 0x3;
1286         ht_info->ampdu_density = 0x6;
1287
1288         memset(&ht_info->mcs, 0, sizeof(ht_info->mcs));
1289         ht_info->cap = IEEE80211_HT_CAP_SUP_WIDTH_20_40;
1290
1291         rx_mcs_supp = GET_RXMCSSUPP(priv->adapter->hw_dev_mcs_support);
1292         /* Set MCS for 1x1 */
1293         memset(mcs, 0xff, rx_mcs_supp);
1294         /* Clear all the other values */
1295         memset(&mcs[rx_mcs_supp], 0,
1296                         sizeof(struct ieee80211_mcs_info) - rx_mcs_supp);
1297         if (priv->bss_mode == NL80211_IFTYPE_STATION ||
1298                         ISSUPP_CHANWIDTH40(adapter->hw_dot_11n_dev_cap))
1299                 /* Set MCS32 for infra mode or ad-hoc mode with 40MHz support */
1300                 SETHT_MCS32(mcs_set.rx_mask);
1301
1302         memcpy((u8 *) &ht_info->mcs, mcs, sizeof(struct ieee80211_mcs_info));
1303
1304         ht_info->mcs.tx_params = IEEE80211_HT_MCS_TX_DEFINED;
1305 }
1306
1307 /* station cfg80211 operations */
1308 static struct cfg80211_ops mwifiex_cfg80211_ops = {
1309         .change_virtual_intf = mwifiex_cfg80211_change_virtual_intf,
1310         .scan = mwifiex_cfg80211_scan,
1311         .connect = mwifiex_cfg80211_connect,
1312         .disconnect = mwifiex_cfg80211_disconnect,
1313         .get_station = mwifiex_cfg80211_get_station,
1314         .set_wiphy_params = mwifiex_cfg80211_set_wiphy_params,
1315         .set_channel = mwifiex_cfg80211_set_channel,
1316         .join_ibss = mwifiex_cfg80211_join_ibss,
1317         .leave_ibss = mwifiex_cfg80211_leave_ibss,
1318         .add_key = mwifiex_cfg80211_add_key,
1319         .del_key = mwifiex_cfg80211_del_key,
1320         .set_default_key = mwifiex_cfg80211_set_default_key,
1321         .set_power_mgmt = mwifiex_cfg80211_set_power_mgmt,
1322         .set_tx_power = mwifiex_cfg80211_set_tx_power,
1323 };
1324
1325 /*
1326  * This function registers the device with CFG802.11 subsystem.
1327  *
1328  * The function creates the wireless device/wiphy, populates it with
1329  * default parameters and handler function pointers, and finally
1330  * registers the device.
1331  */
1332 int mwifiex_register_cfg80211(struct net_device *dev, u8 *mac,
1333                               struct mwifiex_private *priv)
1334 {
1335         int ret = 0;
1336         void *wdev_priv = NULL;
1337         struct wireless_dev *wdev;
1338
1339         wdev = kzalloc(sizeof(struct wireless_dev), GFP_KERNEL);
1340         if (!wdev) {
1341                 dev_err(priv->adapter->dev, "%s: allocating wireless device\n",
1342                                                 __func__);
1343                 return -ENOMEM;
1344         }
1345         wdev->wiphy =
1346                 wiphy_new(&mwifiex_cfg80211_ops,
1347                           sizeof(struct mwifiex_private *));
1348         if (!wdev->wiphy)
1349                 return -ENOMEM;
1350         wdev->iftype = NL80211_IFTYPE_STATION;
1351         wdev->wiphy->max_scan_ssids = 10;
1352         wdev->wiphy->interface_modes =
1353                 BIT(NL80211_IFTYPE_STATION) | BIT(NL80211_IFTYPE_ADHOC);
1354         wdev->wiphy->bands[IEEE80211_BAND_2GHZ] = &mwifiex_band_2ghz;
1355         wdev->wiphy->bands[IEEE80211_BAND_5GHZ] = &mwifiex_band_5ghz;
1356
1357         /* Initialize cipher suits */
1358         wdev->wiphy->cipher_suites = mwifiex_cipher_suites;
1359         wdev->wiphy->n_cipher_suites = ARRAY_SIZE(mwifiex_cipher_suites);
1360
1361         /* Initialize parameters for 2GHz band */
1362
1363         mwifiex_setup_ht_caps(&wdev->wiphy->bands[IEEE80211_BAND_2GHZ]->ht_cap,
1364                                                                         priv);
1365         mwifiex_setup_ht_caps(&wdev->wiphy->bands[IEEE80211_BAND_5GHZ]->ht_cap,
1366                                                                         priv);
1367
1368         memcpy(wdev->wiphy->perm_addr, mac, 6);
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         wdev->wiphy->reg_notifier = mwifiex_reg_notifier;
1375
1376         /* Set struct mwifiex_private pointer in wiphy_priv */
1377         wdev_priv = wiphy_priv(wdev->wiphy);
1378
1379         *(unsigned long *) wdev_priv = (unsigned long) priv;
1380
1381         ret = wiphy_register(wdev->wiphy);
1382         if (ret < 0) {
1383                 dev_err(priv->adapter->dev, "%s: registering cfg80211 device\n",
1384                                                 __func__);
1385                 wiphy_free(wdev->wiphy);
1386                 return ret;
1387         } else {
1388                 dev_dbg(priv->adapter->dev,
1389                                 "info: successfully registered wiphy device\n");
1390         }
1391
1392         dev_net_set(dev, wiphy_net(wdev->wiphy));
1393         dev->ieee80211_ptr = wdev;
1394         memcpy(dev->dev_addr, wdev->wiphy->perm_addr, 6);
1395         memcpy(dev->perm_addr, wdev->wiphy->perm_addr, 6);
1396         SET_NETDEV_DEV(dev, wiphy_dev(wdev->wiphy));
1397         priv->wdev = wdev;
1398
1399         dev->flags |= IFF_BROADCAST | IFF_MULTICAST;
1400         dev->watchdog_timeo = MWIFIEX_DEFAULT_WATCHDOG_TIMEOUT;
1401         dev->hard_header_len += MWIFIEX_MIN_DATA_HEADER_LEN;
1402
1403         return ret;
1404 }
1405
1406 /*
1407  * This function handles the result of different pending network operations.
1408  *
1409  * The following operations are handled and CFG802.11 subsystem is
1410  * notified accordingly -
1411  *      - Scan request completion
1412  *      - Association request completion
1413  *      - IBSS join request completion
1414  *      - Disconnect request completion
1415  */
1416 void
1417 mwifiex_cfg80211_results(struct work_struct *work)
1418 {
1419         struct mwifiex_private *priv =
1420                 container_of(work, struct mwifiex_private, cfg_workqueue);
1421         struct mwifiex_user_scan_cfg *scan_req;
1422         int ret = 0, i;
1423         struct ieee80211_channel *chan;
1424
1425         if (priv->scan_request) {
1426                 scan_req = kzalloc(sizeof(struct mwifiex_user_scan_cfg),
1427                                    GFP_KERNEL);
1428                 if (!scan_req) {
1429                         dev_err(priv->adapter->dev, "failed to alloc "
1430                                                     "scan_req\n");
1431                         return;
1432                 }
1433                 for (i = 0; i < priv->scan_request->n_ssids; i++) {
1434                         memcpy(scan_req->ssid_list[i].ssid,
1435                                         priv->scan_request->ssids[i].ssid,
1436                                         priv->scan_request->ssids[i].ssid_len);
1437                         scan_req->ssid_list[i].max_len =
1438                                         priv->scan_request->ssids[i].ssid_len;
1439                 }
1440                 for (i = 0; i < priv->scan_request->n_channels; i++) {
1441                         chan = priv->scan_request->channels[i];
1442                         scan_req->chan_list[i].chan_number = chan->hw_value;
1443                         scan_req->chan_list[i].radio_type = chan->band;
1444                         if (chan->flags & IEEE80211_CHAN_DISABLED)
1445                                 scan_req->chan_list[i].scan_type =
1446                                         MWIFIEX_SCAN_TYPE_PASSIVE;
1447                         else
1448                                 scan_req->chan_list[i].scan_type =
1449                                         MWIFIEX_SCAN_TYPE_ACTIVE;
1450                         scan_req->chan_list[i].scan_time = 0;
1451                 }
1452                 if (mwifiex_set_user_scan_ioctl(priv, scan_req)) {
1453                         ret = -EFAULT;
1454                         goto done;
1455                 }
1456                 if (mwifiex_inform_bss_from_scan_result(priv, NULL))
1457                         ret = -EFAULT;
1458 done:
1459                 priv->scan_result_status = ret;
1460                 dev_dbg(priv->adapter->dev, "info: %s: sending scan results\n",
1461                                                         __func__);
1462                 cfg80211_scan_done(priv->scan_request,
1463                                 (priv->scan_result_status < 0));
1464                 priv->scan_request = NULL;
1465                 kfree(scan_req);
1466         }
1467
1468         if (priv->assoc_request) {
1469                 if (!priv->assoc_result) {
1470                         cfg80211_connect_result(priv->netdev, priv->cfg_bssid,
1471                                                 NULL, 0, NULL, 0,
1472                                                 WLAN_STATUS_SUCCESS,
1473                                                 GFP_KERNEL);
1474                         dev_dbg(priv->adapter->dev,
1475                                 "info: associated to bssid %pM successfully\n",
1476                                priv->cfg_bssid);
1477                 } else {
1478                         dev_dbg(priv->adapter->dev,
1479                                 "info: association to bssid %pM failed\n",
1480                                priv->cfg_bssid);
1481                         memset(priv->cfg_bssid, 0, ETH_ALEN);
1482                 }
1483                 priv->assoc_request = 0;
1484                 priv->assoc_result = 0;
1485         }
1486
1487         if (priv->ibss_join_request) {
1488                 if (!priv->ibss_join_result) {
1489                         cfg80211_ibss_joined(priv->netdev, priv->cfg_bssid,
1490                                              GFP_KERNEL);
1491                         dev_dbg(priv->adapter->dev,
1492                                 "info: joined/created adhoc network with bssid"
1493                                         " %pM successfully\n", priv->cfg_bssid);
1494                 } else {
1495                         dev_dbg(priv->adapter->dev,
1496                                 "info: failed creating/joining adhoc network\n");
1497                 }
1498                 priv->ibss_join_request = 0;
1499                 priv->ibss_join_result = 0;
1500         }
1501
1502         if (priv->disconnect) {
1503                 memset(priv->cfg_bssid, 0, ETH_ALEN);
1504                 priv->disconnect = 0;
1505         }
1506
1507         return;
1508 }