drivers/net/wireless/iwlwifi/iwl-sta.c

   1 /******************************************************************************
   2  *
   3  * Copyright(c) 2003 - 2010 Intel Corporation. All rights reserved.
   4  *
   5  * Portions of this file are derived from the ipw3945 project, as well
   6  * as portions of the ieee80211 subsystem header files.
   7  *
   8  * This program is free software; you can redistribute it and/or modify it
   9  * under the terms of version 2 of the GNU General Public License as
  10  * published by the Free Software Foundation.
  11  *
  12  * This program is distributed in the hope that it will be useful, but WITHOUT
  13  * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
  14  * FITNESS FOR A PARTICULAR PURPOSE.  See the GNU General Public License for
  15  * more details.
  16  *
  17  * You should have received a copy of the GNU General Public License along with
  18  * this program; if not, write to the Free Software Foundation, Inc.,
  19  * 51 Franklin Street, Fifth Floor, Boston, MA 02110, USA
  20  *
  21  * The full GNU General Public License is included in this distribution in the
  22  * file called LICENSE.
  23  *
  24  * Contact Information:
  25  *  Intel Linux Wireless <ilw@linux.intel.com>
  26  * Intel Corporation, 5200 N.E. Elam Young Parkway, Hillsboro, OR 97124-6497
  27  *
  28  *****************************************************************************/
  29
  30 #include <net/mac80211.h>
  31 #include <linux/etherdevice.h>
  32
  33 #include "iwl-dev.h"
  34 #include "iwl-core.h"
  35 #include "iwl-sta.h"
  36
  37 #define IWL_STA_DRIVER_ACTIVE BIT(0) /* driver entry is active */
  38 #define IWL_STA_UCODE_ACTIVE  BIT(1) /* ucode entry is active */
  39
  40 u8 iwl_find_station(struct iwl_priv *priv, const u8 *addr)
  41 {
  42         int i;
  43         int start = 0;
  44         int ret = IWL_INVALID_STATION;
  45         unsigned long flags;
  46
  47         if ((priv->iw_mode == NL80211_IFTYPE_ADHOC) ||
  48             (priv->iw_mode == NL80211_IFTYPE_AP))
  49                 start = IWL_STA_ID;
  50
  51         if (is_broadcast_ether_addr(addr))
  52                 return priv->hw_params.bcast_sta_id;
  53
  54         spin_lock_irqsave(&priv->sta_lock, flags);
  55         for (i = start; i < priv->hw_params.max_stations; i++)
  56                 if (priv->stations[i].used &&
  57                     (!compare_ether_addr(priv->stations[i].sta.sta.addr,
  58                                          addr))) {
  59                         ret = i;
  60                         goto out;
  61                 }
  62
  63         IWL_DEBUG_ASSOC_LIMIT(priv, "can not find STA %pM total %d\n",
  64                               addr, priv->num_stations);
  65
  66  out:
  67         spin_unlock_irqrestore(&priv->sta_lock, flags);
  68         return ret;
  69 }
  70 EXPORT_SYMBOL(iwl_find_station);
  71
  72 int iwl_get_ra_sta_id(struct iwl_priv *priv, struct ieee80211_hdr *hdr)
  73 {
  74         if (priv->iw_mode == NL80211_IFTYPE_STATION) {
  75                 return IWL_AP_ID;
  76         } else {
  77                 u8 *da = ieee80211_get_DA(hdr);
  78                 return iwl_find_station(priv, da);
  79         }
  80 }
  81 EXPORT_SYMBOL(iwl_get_ra_sta_id);
  82
  83 static void iwl_sta_ucode_activate(struct iwl_priv *priv, u8 sta_id)
  84 {
  85         unsigned long flags;
  86
  87         spin_lock_irqsave(&priv->sta_lock, flags);
  88
  89         if (!(priv->stations[sta_id].used & IWL_STA_DRIVER_ACTIVE))
  90                 IWL_ERR(priv, "ACTIVATE a non DRIVER active station %d\n",
  91                         sta_id);
  92
  93         priv->stations[sta_id].used |= IWL_STA_UCODE_ACTIVE;
  94         IWL_DEBUG_ASSOC(priv, "Added STA to Ucode: %pM\n",
  95                         priv->stations[sta_id].sta.sta.addr);
  96
  97         spin_unlock_irqrestore(&priv->sta_lock, flags);
  98 }
  99
 100 static void iwl_add_sta_callback(struct iwl_priv *priv,
 101                                  struct iwl_device_cmd *cmd,
 102                                  struct iwl_rx_packet *pkt)
 103 {
 104         struct iwl_addsta_cmd *addsta =
 105                 (struct iwl_addsta_cmd *)cmd->cmd.payload;
 106         u8 sta_id = addsta->sta.sta_id;
 107
 108         if (pkt->hdr.flags & IWL_CMD_FAILED_MSK) {
 109                 IWL_ERR(priv, "Bad return from REPLY_ADD_STA (0x%08X)\n",
 110                           pkt->hdr.flags);
 111                 return;
 112         }
 113
 114         switch (pkt->u.add_sta.status) {
 115         case ADD_STA_SUCCESS_MSK:
 116                 iwl_sta_ucode_activate(priv, sta_id);
 117                  /* fall through */
 118         default:
 119                 IWL_DEBUG_HC(priv, "Received REPLY_ADD_STA:(0x%08X)\n",
 120                              pkt->u.add_sta.status);
 121                 break;
 122         }
 123 }
 124
 125 int iwl_send_add_sta(struct iwl_priv *priv,
 126                      struct iwl_addsta_cmd *sta, u8 flags)
 127 {
 128         struct iwl_rx_packet *pkt = NULL;
 129         int ret = 0;
 130         u8 data[sizeof(*sta)];
 131         struct iwl_host_cmd cmd = {
 132                 .id = REPLY_ADD_STA,
 133                 .flags = flags,
 134                 .data = data,
 135         };
 136
 137         if (flags & CMD_ASYNC)
 138                 cmd.callback = iwl_add_sta_callback;
 139         else
 140                 cmd.flags |= CMD_WANT_SKB;
 141
 142         cmd.len = priv->cfg->ops->utils->build_addsta_hcmd(sta, data);
 143         ret = iwl_send_cmd(priv, &cmd);
 144
 145         if (ret || (flags & CMD_ASYNC))
 146                 return ret;
 147
 148         pkt = (struct iwl_rx_packet *)cmd.reply_page;
 149         if (pkt->hdr.flags & IWL_CMD_FAILED_MSK) {
 150                 IWL_ERR(priv, "Bad return from REPLY_ADD_STA (0x%08X)\n",
 151                           pkt->hdr.flags);
 152                 ret = -EIO;
 153         }
 154
 155         if (ret == 0) {
 156                 switch (pkt->u.add_sta.status) {
 157                 case ADD_STA_SUCCESS_MSK:
 158                         iwl_sta_ucode_activate(priv, sta->sta.sta_id);
 159                         IWL_DEBUG_INFO(priv, "REPLY_ADD_STA PASSED\n");
 160                         break;
 161                 default:
 162                         ret = -EIO;
 163                         IWL_WARN(priv, "REPLY_ADD_STA failed\n");
 164                         break;
 165                 }
 166         }
 167         iwl_free_pages(priv, cmd.reply_page);
 168
 169         return ret;
 170 }
 171 EXPORT_SYMBOL(iwl_send_add_sta);
 172
 173 static void iwl_set_ht_add_station(struct iwl_priv *priv, u8 index,
 174                                    struct ieee80211_sta_ht_cap *sta_ht_inf)
 175 {
 176         __le32 sta_flags;
 177         u8 mimo_ps_mode;
 178
 179         if (!sta_ht_inf || !sta_ht_inf->ht_supported)
 180                 goto done;
 181
 182         mimo_ps_mode = (sta_ht_inf->cap & IEEE80211_HT_CAP_SM_PS) >> 2;
 183         IWL_DEBUG_ASSOC(priv, "spatial multiplexing power save mode: %s\n",
 184                         (mimo_ps_mode == WLAN_HT_CAP_SM_PS_STATIC) ?
 185                         "static" :
 186                         (mimo_ps_mode == WLAN_HT_CAP_SM_PS_DYNAMIC) ?
 187                         "dynamic" : "disabled");
 188
 189         sta_flags = priv->stations[index].sta.station_flags;
 190
 191         sta_flags &= ~(STA_FLG_RTS_MIMO_PROT_MSK | STA_FLG_MIMO_DIS_MSK);
 192
 193         switch (mimo_ps_mode) {
 194         case WLAN_HT_CAP_SM_PS_STATIC:
 195                 sta_flags |= STA_FLG_MIMO_DIS_MSK;
 196                 break;
 197         case WLAN_HT_CAP_SM_PS_DYNAMIC:
 198                 sta_flags |= STA_FLG_RTS_MIMO_PROT_MSK;
 199                 break;
 200         case WLAN_HT_CAP_SM_PS_DISABLED:
 201                 break;
 202         default:
 203                 IWL_WARN(priv, "Invalid MIMO PS mode %d\n", mimo_ps_mode);
 204                 break;
 205         }
 206
 207         sta_flags |= cpu_to_le32(
 208               (u32)sta_ht_inf->ampdu_factor << STA_FLG_MAX_AGG_SIZE_POS);
 209
 210         sta_flags |= cpu_to_le32(
 211               (u32)sta_ht_inf->ampdu_density << STA_FLG_AGG_MPDU_DENSITY_POS);
 212
 213         if (iwl_is_ht40_tx_allowed(priv, sta_ht_inf))
 214                 sta_flags |= STA_FLG_HT40_EN_MSK;
 215         else
 216                 sta_flags &= ~STA_FLG_HT40_EN_MSK;
 217
 218         priv->stations[index].sta.station_flags = sta_flags;
 219  done:
 220         return;
 221 }
 222
 223 /**
 224  * iwl_add_station - Add station to tables in driver and device
 225  */
 226 u8 iwl_add_station(struct iwl_priv *priv, const u8 *addr, bool is_ap, u8 flags,
 227                 struct ieee80211_sta_ht_cap *ht_info)
 228 {
 229         struct iwl_station_entry *station;
 230         unsigned long flags_spin;
 231         int i;
 232         int sta_id = IWL_INVALID_STATION;
 233         u16 rate;
 234
 235         spin_lock_irqsave(&priv->sta_lock, flags_spin);
 236         if (is_ap)
 237                 sta_id = IWL_AP_ID;
 238         else if (is_broadcast_ether_addr(addr))
 239                 sta_id = priv->hw_params.bcast_sta_id;
 240         else
 241                 for (i = IWL_STA_ID; i < priv->hw_params.max_stations; i++) {
 242                         if (!compare_ether_addr(priv->stations[i].sta.sta.addr,
 243                                                 addr)) {
 244                                 sta_id = i;
 245                                 break;
 246                         }
 247
 248                         if (!priv->stations[i].used &&
 249                             sta_id == IWL_INVALID_STATION)
 250                                 sta_id = i;
 251                 }
 252
 253         /* These two conditions have the same outcome, but keep them separate
 254            since they have different meanings */
 255         if (unlikely(sta_id == IWL_INVALID_STATION)) {
 256                 spin_unlock_irqrestore(&priv->sta_lock, flags_spin);
 257                 return sta_id;
 258         }
 259
 260         if (priv->stations[sta_id].used &&
 261             !compare_ether_addr(priv->stations[sta_id].sta.sta.addr, addr)) {
 262                 spin_unlock_irqrestore(&priv->sta_lock, flags_spin);
 263                 return sta_id;
 264         }
 265
 266
 267         station = &priv->stations[sta_id];
 268         station->used = IWL_STA_DRIVER_ACTIVE;
 269         IWL_DEBUG_ASSOC(priv, "Add STA to driver ID %d: %pM\n",
 270                         sta_id, addr);
 271         priv->num_stations++;
 272
 273         /* Set up the REPLY_ADD_STA command to send to device */
 274         memset(&station->sta, 0, sizeof(struct iwl_addsta_cmd));
 275         memcpy(station->sta.sta.addr, addr, ETH_ALEN);
 276         station->sta.mode = 0;
 277         station->sta.sta.sta_id = sta_id;
 278         station->sta.station_flags = 0;
 279
 280         /* BCAST station and IBSS stations do not work in HT mode */
 281         if (sta_id != priv->hw_params.bcast_sta_id &&
 282             priv->iw_mode != NL80211_IFTYPE_ADHOC)
 283                 iwl_set_ht_add_station(priv, sta_id, ht_info);
 284
 285         /* 3945 only */
 286         rate = (priv->band == IEEE80211_BAND_5GHZ) ?
 287                 IWL_RATE_6M_PLCP : IWL_RATE_1M_PLCP;
 288         /* Turn on both antennas for the station... */
 289         station->sta.rate_n_flags = cpu_to_le16(rate | RATE_MCS_ANT_AB_MSK);
 290
 291         spin_unlock_irqrestore(&priv->sta_lock, flags_spin);
 292
 293         /* Add station to device's station table */
 294         iwl_send_add_sta(priv, &station->sta, flags);
 295         return sta_id;
 296
 297 }
 298 EXPORT_SYMBOL(iwl_add_station);
 299
 300 static void iwl_sta_ucode_deactivate(struct iwl_priv *priv, const char *addr)
 301 {
 302         unsigned long flags;
 303         u8 sta_id = iwl_find_station(priv, addr);
 304
 305         BUG_ON(sta_id == IWL_INVALID_STATION);
 306
 307         IWL_DEBUG_ASSOC(priv, "Removed STA from Ucode: %pM\n", addr);
 308
 309         spin_lock_irqsave(&priv->sta_lock, flags);
 310
 311         /* Ucode must be active and driver must be non active */
 312         if (priv->stations[sta_id].used != IWL_STA_UCODE_ACTIVE)
 313                 IWL_ERR(priv, "removed non active STA %d\n", sta_id);
 314
 315         priv->stations[sta_id].used &= ~IWL_STA_UCODE_ACTIVE;
 316
 317         memset(&priv->stations[sta_id], 0, sizeof(struct iwl_station_entry));
 318         spin_unlock_irqrestore(&priv->sta_lock, flags);
 319 }
 320
 321 static void iwl_remove_sta_callback(struct iwl_priv *priv,
 322                                     struct iwl_device_cmd *cmd,
 323                                     struct iwl_rx_packet *pkt)
 324 {
 325         struct iwl_rem_sta_cmd *rm_sta =
 326                         (struct iwl_rem_sta_cmd *)cmd->cmd.payload;
 327         const char *addr = rm_sta->addr;
 328
 329         if (pkt->hdr.flags & IWL_CMD_FAILED_MSK) {
 330                 IWL_ERR(priv, "Bad return from REPLY_REMOVE_STA (0x%08X)\n",
 331                 pkt->hdr.flags);
 332                 return;
 333         }
 334
 335         switch (pkt->u.rem_sta.status) {
 336         case REM_STA_SUCCESS_MSK:
 337                 iwl_sta_ucode_deactivate(priv, addr);
 338                 break;
 339         default:
 340                 IWL_ERR(priv, "REPLY_REMOVE_STA failed\n");
 341                 break;
 342         }
 343 }
 344
 345 static int iwl_send_remove_station(struct iwl_priv *priv, const u8 *addr,
 346                                    u8 flags)
 347 {
 348         struct iwl_rx_packet *pkt;
 349         int ret;
 350
 351         struct iwl_rem_sta_cmd rm_sta_cmd;
 352
 353         struct iwl_host_cmd cmd = {
 354                 .id = REPLY_REMOVE_STA,
 355                 .len = sizeof(struct iwl_rem_sta_cmd),
 356                 .flags = flags,
 357                 .data = &rm_sta_cmd,
 358         };
 359
 360         memset(&rm_sta_cmd, 0, sizeof(rm_sta_cmd));
 361         rm_sta_cmd.num_sta = 1;
 362         memcpy(&rm_sta_cmd.addr, addr , ETH_ALEN);
 363
 364         if (flags & CMD_ASYNC)
 365                 cmd.callback = iwl_remove_sta_callback;
 366         else
 367                 cmd.flags |= CMD_WANT_SKB;
 368         ret = iwl_send_cmd(priv, &cmd);
 369
 370         if (ret || (flags & CMD_ASYNC))
 371                 return ret;
 372
 373         pkt = (struct iwl_rx_packet *)cmd.reply_page;
 374         if (pkt->hdr.flags & IWL_CMD_FAILED_MSK) {
 375                 IWL_ERR(priv, "Bad return from REPLY_REMOVE_STA (0x%08X)\n",
 376                           pkt->hdr.flags);
 377                 ret = -EIO;
 378         }
 379
 380         if (!ret) {
 381                 switch (pkt->u.rem_sta.status) {
 382                 case REM_STA_SUCCESS_MSK:
 383                         iwl_sta_ucode_deactivate(priv, addr);
 384                         IWL_DEBUG_ASSOC(priv, "REPLY_REMOVE_STA PASSED\n");
 385                         break;
 386                 default:
 387                         ret = -EIO;
 388                         IWL_ERR(priv, "REPLY_REMOVE_STA failed\n");
 389                         break;
 390                 }
 391         }
 392         iwl_free_pages(priv, cmd.reply_page);
 393
 394         return ret;
 395 }
 396
 397 /**
 398  * iwl_remove_station - Remove driver's knowledge of station.
 399  */
 400 int iwl_remove_station(struct iwl_priv *priv, const u8 *addr, bool is_ap)
 401 {
 402         int sta_id = IWL_INVALID_STATION;
 403         int i, ret = -EINVAL;
 404         unsigned long flags;
 405
 406         spin_lock_irqsave(&priv->sta_lock, flags);
 407
 408         if (is_ap)
 409                 sta_id = IWL_AP_ID;
 410         else if (is_broadcast_ether_addr(addr))
 411                 sta_id = priv->hw_params.bcast_sta_id;
 412         else
 413                 for (i = IWL_STA_ID; i < priv->hw_params.max_stations; i++)
 414                         if (priv->stations[i].used &&
 415                             !compare_ether_addr(priv->stations[i].sta.sta.addr,
 416                                                 addr)) {
 417                                 sta_id = i;
 418                                 break;
 419                         }
 420
 421         if (unlikely(sta_id == IWL_INVALID_STATION))
 422                 goto out;
 423
 424         IWL_DEBUG_ASSOC(priv, "Removing STA from driver:%d  %pM\n",
 425                 sta_id, addr);
 426
 427         if (!(priv->stations[sta_id].used & IWL_STA_DRIVER_ACTIVE)) {
 428                 IWL_ERR(priv, "Removing %pM but non DRIVER active\n",
 429                                 addr);
 430                 goto out;
 431         }
 432
 433         if (!(priv->stations[sta_id].used & IWL_STA_UCODE_ACTIVE)) {
 434                 IWL_ERR(priv, "Removing %pM but non UCODE active\n",
 435                                 addr);
 436                 goto out;
 437         }
 438
 439
 440         priv->stations[sta_id].used &= ~IWL_STA_DRIVER_ACTIVE;
 441
 442         priv->num_stations--;
 443
 444         BUG_ON(priv->num_stations < 0);
 445
 446         spin_unlock_irqrestore(&priv->sta_lock, flags);
 447
 448         ret = iwl_send_remove_station(priv, addr, CMD_ASYNC);
 449         return ret;
 450 out:
 451         spin_unlock_irqrestore(&priv->sta_lock, flags);
 452         return ret;
 453 }
 454
 455 /**
 456  * iwl_clear_stations_table - Clear the driver's station table
 457  *
 458  * NOTE:  This does not clear or otherwise alter the device's station table.
 459  */
 460 void iwl_clear_stations_table(struct iwl_priv *priv)
 461 {
 462         unsigned long flags;
 463         int i;
 464
 465         spin_lock_irqsave(&priv->sta_lock, flags);
 466
 467         if (iwl_is_alive(priv) &&
 468            !test_bit(STATUS_EXIT_PENDING, &priv->status) &&
 469            iwl_send_cmd_pdu_async(priv, REPLY_REMOVE_ALL_STA, 0, NULL, NULL))
 470                 IWL_ERR(priv, "Couldn't clear the station table\n");
 471
 472         priv->num_stations = 0;
 473         memset(priv->stations, 0, sizeof(priv->stations));
 474
 475         /* clean ucode key table bit map */
 476         priv->ucode_key_table = 0;
 477
 478         /* keep track of static keys */
 479         for (i = 0; i < WEP_KEYS_MAX ; i++) {
 480                 if (priv->wep_keys[i].key_size)
 481                         set_bit(i, &priv->ucode_key_table);
 482         }
 483
 484         spin_unlock_irqrestore(&priv->sta_lock, flags);
 485 }
 486 EXPORT_SYMBOL(iwl_clear_stations_table);
 487
 488 int iwl_get_free_ucode_key_index(struct iwl_priv *priv)
 489 {
 490         int i;
 491
 492         for (i = 0; i < STA_KEY_MAX_NUM; i++)
 493                 if (!test_and_set_bit(i, &priv->ucode_key_table))
 494                         return i;
 495
 496         return WEP_INVALID_OFFSET;
 497 }
 498 EXPORT_SYMBOL(iwl_get_free_ucode_key_index);
 499
 500 int iwl_send_static_wepkey_cmd(struct iwl_priv *priv, u8 send_if_empty)
 501 {
 502         int i, not_empty = 0;
 503         u8 buff[sizeof(struct iwl_wep_cmd) +
 504                 sizeof(struct iwl_wep_key) * WEP_KEYS_MAX];
 505         struct iwl_wep_cmd *wep_cmd = (struct iwl_wep_cmd *)buff;
 506         size_t cmd_size  = sizeof(struct iwl_wep_cmd);
 507         struct iwl_host_cmd cmd = {
 508                 .id = REPLY_WEPKEY,
 509                 .data = wep_cmd,
 510                 .flags = CMD_ASYNC,
 511         };
 512
 513         memset(wep_cmd, 0, cmd_size +
 514                         (sizeof(struct iwl_wep_key) * WEP_KEYS_MAX));
 515
 516         for (i = 0; i < WEP_KEYS_MAX ; i++) {
 517                 wep_cmd->key[i].key_index = i;
 518                 if (priv->wep_keys[i].key_size) {
 519                         wep_cmd->key[i].key_offset = i;
 520                         not_empty = 1;
 521                 } else {
 522                         wep_cmd->key[i].key_offset = WEP_INVALID_OFFSET;
 523                 }
 524
 525                 wep_cmd->key[i].key_size = priv->wep_keys[i].key_size;
 526                 memcpy(&wep_cmd->key[i].key[3], priv->wep_keys[i].key,
 527                                 priv->wep_keys[i].key_size);
 528         }
 529
 530         wep_cmd->global_key_type = WEP_KEY_WEP_TYPE;
 531         wep_cmd->num_keys = WEP_KEYS_MAX;
 532
 533         cmd_size += sizeof(struct iwl_wep_key) * WEP_KEYS_MAX;
 534
 535         cmd.len = cmd_size;
 536
 537         if (not_empty || send_if_empty)
 538                 return iwl_send_cmd(priv, &cmd);
 539         else
 540                 return 0;
 541 }
 542 EXPORT_SYMBOL(iwl_send_static_wepkey_cmd);
 543
 544 int iwl_remove_default_wep_key(struct iwl_priv *priv,
 545                                struct ieee80211_key_conf *keyconf)
 546 {
 547         int ret;
 548         unsigned long flags;
 549
 550         spin_lock_irqsave(&priv->sta_lock, flags);
 551         IWL_DEBUG_WEP(priv, "Removing default WEP key: idx=%d\n",
 552                       keyconf->keyidx);
 553
 554         if (!test_and_clear_bit(keyconf->keyidx, &priv->ucode_key_table))
 555                 IWL_ERR(priv, "index %d not used in uCode key table.\n",
 556                           keyconf->keyidx);
 557
 558         priv->default_wep_key--;
 559         memset(&priv->wep_keys[keyconf->keyidx], 0, sizeof(priv->wep_keys[0]));
 560         if (iwl_is_rfkill(priv)) {
 561                 IWL_DEBUG_WEP(priv, "Not sending REPLY_WEPKEY command due to RFKILL.\n");
 562                 spin_unlock_irqrestore(&priv->sta_lock, flags);
 563                 return 0;
 564         }
 565         ret = iwl_send_static_wepkey_cmd(priv, 1);
 566         IWL_DEBUG_WEP(priv, "Remove default WEP key: idx=%d ret=%d\n",
 567                       keyconf->keyidx, ret);
 568         spin_unlock_irqrestore(&priv->sta_lock, flags);
 569
 570         return ret;
 571 }
 572 EXPORT_SYMBOL(iwl_remove_default_wep_key);
 573
 574 int iwl_set_default_wep_key(struct iwl_priv *priv,
 575                             struct ieee80211_key_conf *keyconf)
 576 {
 577         int ret;
 578         unsigned long flags;
 579
 580         if (keyconf->keylen != WEP_KEY_LEN_128 &&
 581             keyconf->keylen != WEP_KEY_LEN_64) {
 582                 IWL_DEBUG_WEP(priv, "Bad WEP key length %d\n", keyconf->keylen);
 583                 return -EINVAL;
 584         }
 585
 586         keyconf->flags &= ~IEEE80211_KEY_FLAG_GENERATE_IV;
 587         keyconf->hw_key_idx = HW_KEY_DEFAULT;
 588         priv->stations[IWL_AP_ID].keyinfo.alg = ALG_WEP;
 589
 590         spin_lock_irqsave(&priv->sta_lock, flags);
 591         priv->default_wep_key++;
 592
 593         if (test_and_set_bit(keyconf->keyidx, &priv->ucode_key_table))
 594                 IWL_ERR(priv, "index %d already used in uCode key table.\n",
 595                         keyconf->keyidx);
 596
 597         priv->wep_keys[keyconf->keyidx].key_size = keyconf->keylen;
 598         memcpy(&priv->wep_keys[keyconf->keyidx].key, &keyconf->key,
 599                                                         keyconf->keylen);
 600
 601         ret = iwl_send_static_wepkey_cmd(priv, 0);
 602         IWL_DEBUG_WEP(priv, "Set default WEP key: len=%d idx=%d ret=%d\n",
 603                 keyconf->keylen, keyconf->keyidx, ret);
 604         spin_unlock_irqrestore(&priv->sta_lock, flags);
 605
 606         return ret;
 607 }
 608 EXPORT_SYMBOL(iwl_set_default_wep_key);
 609
 610 static int iwl_set_wep_dynamic_key_info(struct iwl_priv *priv,
 611                                 struct ieee80211_key_conf *keyconf,
 612                                 u8 sta_id)
 613 {
 614         unsigned long flags;
 615         __le16 key_flags = 0;
 616         int ret;
 617
 618         keyconf->flags &= ~IEEE80211_KEY_FLAG_GENERATE_IV;
 619
 620         key_flags |= (STA_KEY_FLG_WEP | STA_KEY_FLG_MAP_KEY_MSK);
 621         key_flags |= cpu_to_le16(keyconf->keyidx << STA_KEY_FLG_KEYID_POS);
 622         key_flags &= ~STA_KEY_FLG_INVALID;
 623
 624         if (keyconf->keylen == WEP_KEY_LEN_128)
 625                 key_flags |= STA_KEY_FLG_KEY_SIZE_MSK;
 626
 627         if (sta_id == priv->hw_params.bcast_sta_id)
 628                 key_flags |= STA_KEY_MULTICAST_MSK;
 629
 630         spin_lock_irqsave(&priv->sta_lock, flags);
 631
 632         priv->stations[sta_id].keyinfo.alg = keyconf->alg;
 633         priv->stations[sta_id].keyinfo.keylen = keyconf->keylen;
 634         priv->stations[sta_id].keyinfo.keyidx = keyconf->keyidx;
 635
 636         memcpy(priv->stations[sta_id].keyinfo.key,
 637                                 keyconf->key, keyconf->keylen);
 638
 639         memcpy(&priv->stations[sta_id].sta.key.key[3],
 640                                 keyconf->key, keyconf->keylen);
 641
 642         if ((priv->stations[sta_id].sta.key.key_flags & STA_KEY_FLG_ENCRYPT_MSK)
 643                         == STA_KEY_FLG_NO_ENC)
 644                 priv->stations[sta_id].sta.key.key_offset =
 645                                  iwl_get_free_ucode_key_index(priv);
 646         /* else, we are overriding an existing key => no need to allocated room
 647          * in uCode. */
 648
 649         WARN(priv->stations[sta_id].sta.key.key_offset == WEP_INVALID_OFFSET,
 650                 "no space for a new key");
 651
 652         priv->stations[sta_id].sta.key.key_flags = key_flags;
 653         priv->stations[sta_id].sta.sta.modify_mask = STA_MODIFY_KEY_MASK;
 654         priv->stations[sta_id].sta.mode = STA_CONTROL_MODIFY_MSK;
 655
 656         ret = iwl_send_add_sta(priv, &priv->stations[sta_id].sta, CMD_ASYNC);
 657
 658         spin_unlock_irqrestore(&priv->sta_lock, flags);
 659
 660         return ret;
 661 }
 662
 663 static int iwl_set_ccmp_dynamic_key_info(struct iwl_priv *priv,
 664                                    struct ieee80211_key_conf *keyconf,
 665                                    u8 sta_id)
 666 {
 667         unsigned long flags;
 668         __le16 key_flags = 0;
 669         int ret;
 670
 671         key_flags |= (STA_KEY_FLG_CCMP | STA_KEY_FLG_MAP_KEY_MSK);
 672         key_flags |= cpu_to_le16(keyconf->keyidx << STA_KEY_FLG_KEYID_POS);
 673         key_flags &= ~STA_KEY_FLG_INVALID;
 674
 675         if (sta_id == priv->hw_params.bcast_sta_id)
 676                 key_flags |= STA_KEY_MULTICAST_MSK;
 677
 678         keyconf->flags |= IEEE80211_KEY_FLAG_GENERATE_IV;
 679
 680         spin_lock_irqsave(&priv->sta_lock, flags);
 681         priv->stations[sta_id].keyinfo.alg = keyconf->alg;
 682         priv->stations[sta_id].keyinfo.keylen = keyconf->keylen;
 683
 684         memcpy(priv->stations[sta_id].keyinfo.key, keyconf->key,
 685                keyconf->keylen);
 686
 687         memcpy(priv->stations[sta_id].sta.key.key, keyconf->key,
 688                keyconf->keylen);
 689
 690         if ((priv->stations[sta_id].sta.key.key_flags & STA_KEY_FLG_ENCRYPT_MSK)
 691                         == STA_KEY_FLG_NO_ENC)
 692                 priv->stations[sta_id].sta.key.key_offset =
 693                                  iwl_get_free_ucode_key_index(priv);
 694         /* else, we are overriding an existing key => no need to allocated room
 695          * in uCode. */
 696
 697         WARN(priv->stations[sta_id].sta.key.key_offset == WEP_INVALID_OFFSET,
 698                 "no space for a new key");
 699
 700         priv->stations[sta_id].sta.key.key_flags = key_flags;
 701         priv->stations[sta_id].sta.sta.modify_mask = STA_MODIFY_KEY_MASK;
 702         priv->stations[sta_id].sta.mode = STA_CONTROL_MODIFY_MSK;
 703
 704         ret = iwl_send_add_sta(priv, &priv->stations[sta_id].sta, CMD_ASYNC);
 705
 706         spin_unlock_irqrestore(&priv->sta_lock, flags);
 707
 708         return ret;
 709 }
 710
 711 static int iwl_set_tkip_dynamic_key_info(struct iwl_priv *priv,
 712                                    struct ieee80211_key_conf *keyconf,
 713                                    u8 sta_id)
 714 {
 715         unsigned long flags;
 716         int ret = 0;
 717         __le16 key_flags = 0;
 718
 719         key_flags |= (STA_KEY_FLG_TKIP | STA_KEY_FLG_MAP_KEY_MSK);
 720         key_flags |= cpu_to_le16(keyconf->keyidx << STA_KEY_FLG_KEYID_POS);
 721         key_flags &= ~STA_KEY_FLG_INVALID;
 722
 723         if (sta_id == priv->hw_params.bcast_sta_id)
 724                 key_flags |= STA_KEY_MULTICAST_MSK;
 725
 726         keyconf->flags |= IEEE80211_KEY_FLAG_GENERATE_IV;
 727         keyconf->flags |= IEEE80211_KEY_FLAG_GENERATE_MMIC;
 728
 729         spin_lock_irqsave(&priv->sta_lock, flags);
 730
 731         priv->stations[sta_id].keyinfo.alg = keyconf->alg;
 732         priv->stations[sta_id].keyinfo.keylen = 16;
 733
 734         if ((priv->stations[sta_id].sta.key.key_flags & STA_KEY_FLG_ENCRYPT_MSK)
 735                         == STA_KEY_FLG_NO_ENC)
 736                 priv->stations[sta_id].sta.key.key_offset =
 737                                  iwl_get_free_ucode_key_index(priv);
 738         /* else, we are overriding an existing key => no need to allocated room
 739          * in uCode. */
 740
 741         WARN(priv->stations[sta_id].sta.key.key_offset == WEP_INVALID_OFFSET,
 742                 "no space for a new key");
 743
 744         priv->stations[sta_id].sta.key.key_flags = key_flags;
 745
 746
 747         /* This copy is acutally not needed: we get the key with each TX */
 748         memcpy(priv->stations[sta_id].keyinfo.key, keyconf->key, 16);
 749
 750         memcpy(priv->stations[sta_id].sta.key.key, keyconf->key, 16);
 751
 752         spin_unlock_irqrestore(&priv->sta_lock, flags);
 753
 754         return ret;
 755 }
 756
 757 void iwl_update_tkip_key(struct iwl_priv *priv,
 758                         struct ieee80211_key_conf *keyconf,
 759                         const u8 *addr, u32 iv32, u16 *phase1key)
 760 {
 761         u8 sta_id = IWL_INVALID_STATION;
 762         unsigned long flags;
 763         int i;
 764
 765         sta_id = iwl_find_station(priv, addr);
 766         if (sta_id == IWL_INVALID_STATION) {
 767                 IWL_DEBUG_MAC80211(priv, "leave - %pM not in station map.\n",
 768                                    addr);
 769                 return;
 770         }
 771
 772         if (iwl_scan_cancel(priv)) {
 773                 /* cancel scan failed, just live w/ bad key and rely
 774                    briefly on SW decryption */
 775                 return;
 776         }
 777
 778         spin_lock_irqsave(&priv->sta_lock, flags);
 779
 780         priv->stations[sta_id].sta.key.tkip_rx_tsc_byte2 = (u8) iv32;
 781
 782         for (i = 0; i < 5; i++)
 783                 priv->stations[sta_id].sta.key.tkip_rx_ttak[i] =
 784                         cpu_to_le16(phase1key[i]);
 785
 786         priv->stations[sta_id].sta.sta.modify_mask = STA_MODIFY_KEY_MASK;
 787         priv->stations[sta_id].sta.mode = STA_CONTROL_MODIFY_MSK;
 788
 789         iwl_send_add_sta(priv, &priv->stations[sta_id].sta, CMD_ASYNC);
 790
 791         spin_unlock_irqrestore(&priv->sta_lock, flags);
 792
 793 }
 794 EXPORT_SYMBOL(iwl_update_tkip_key);
 795
 796 int iwl_remove_dynamic_key(struct iwl_priv *priv,
 797                                 struct ieee80211_key_conf *keyconf,
 798                                 u8 sta_id)
 799 {
 800         unsigned long flags;
 801         int ret = 0;
 802         u16 key_flags;
 803         u8 keyidx;
 804
 805         priv->key_mapping_key--;
 806
 807         spin_lock_irqsave(&priv->sta_lock, flags);
 808         key_flags = le16_to_cpu(priv->stations[sta_id].sta.key.key_flags);
 809         keyidx = (key_flags >> STA_KEY_FLG_KEYID_POS) & 0x3;
 810
 811         IWL_DEBUG_WEP(priv, "Remove dynamic key: idx=%d sta=%d\n",
 812                       keyconf->keyidx, sta_id);
 813
 814         if (keyconf->keyidx != keyidx) {
 815                 /* We need to remove a key with index different that the one
 816                  * in the uCode. This means that the key we need to remove has
 817                  * been replaced by another one with different index.
 818                  * Don't do anything and return ok
 819                  */
 820                 spin_unlock_irqrestore(&priv->sta_lock, flags);
 821                 return 0;
 822         }
 823
 824         if (priv->stations[sta_id].sta.key.key_offset == WEP_INVALID_OFFSET) {
 825                 IWL_WARN(priv, "Removing wrong key %d 0x%x\n",
 826                             keyconf->keyidx, key_flags);
 827                 spin_unlock_irqrestore(&priv->sta_lock, flags);
 828                 return 0;
 829         }
 830
 831         if (!test_and_clear_bit(priv->stations[sta_id].sta.key.key_offset,
 832                 &priv->ucode_key_table))
 833                 IWL_ERR(priv, "index %d not used in uCode key table.\n",
 834                         priv->stations[sta_id].sta.key.key_offset);
 835         memset(&priv->stations[sta_id].keyinfo, 0,
 836                                         sizeof(struct iwl_hw_key));
 837         memset(&priv->stations[sta_id].sta.key, 0,
 838                                         sizeof(struct iwl4965_keyinfo));
 839         priv->stations[sta_id].sta.key.key_flags =
 840                         STA_KEY_FLG_NO_ENC | STA_KEY_FLG_INVALID;
 841         priv->stations[sta_id].sta.key.key_offset = WEP_INVALID_OFFSET;
 842         priv->stations[sta_id].sta.sta.modify_mask = STA_MODIFY_KEY_MASK;
 843         priv->stations[sta_id].sta.mode = STA_CONTROL_MODIFY_MSK;
 844
 845         if (iwl_is_rfkill(priv)) {
 846                 IWL_DEBUG_WEP(priv, "Not sending REPLY_ADD_STA command because RFKILL enabled. \n");
 847                 spin_unlock_irqrestore(&priv->sta_lock, flags);
 848                 return 0;
 849         }
 850         ret =  iwl_send_add_sta(priv, &priv->stations[sta_id].sta, CMD_ASYNC);
 851         spin_unlock_irqrestore(&priv->sta_lock, flags);
 852         return ret;
 853 }
 854 EXPORT_SYMBOL(iwl_remove_dynamic_key);
 855
 856 int iwl_set_dynamic_key(struct iwl_priv *priv,
 857                                 struct ieee80211_key_conf *keyconf, u8 sta_id)
 858 {
 859         int ret;
 860
 861         priv->key_mapping_key++;
 862         keyconf->hw_key_idx = HW_KEY_DYNAMIC;
 863
 864         switch (keyconf->alg) {
 865         case ALG_CCMP:
 866                 ret = iwl_set_ccmp_dynamic_key_info(priv, keyconf, sta_id);
 867                 break;
 868         case ALG_TKIP:
 869                 ret = iwl_set_tkip_dynamic_key_info(priv, keyconf, sta_id);
 870                 break;
 871         case ALG_WEP:
 872                 ret = iwl_set_wep_dynamic_key_info(priv, keyconf, sta_id);
 873                 break;
 874         default:
 875                 IWL_ERR(priv,
 876                         "Unknown alg: %s alg = %d\n", __func__, keyconf->alg);
 877                 ret = -EINVAL;
 878         }
 879
 880         IWL_DEBUG_WEP(priv, "Set dynamic key: alg= %d len=%d idx=%d sta=%d ret=%d\n",
 881                       keyconf->alg, keyconf->keylen, keyconf->keyidx,
 882                       sta_id, ret);
 883
 884         return ret;
 885 }
 886 EXPORT_SYMBOL(iwl_set_dynamic_key);
 887
 888 #ifdef CONFIG_IWLWIFI_DEBUG
 889 static void iwl_dump_lq_cmd(struct iwl_priv *priv,
 890                            struct iwl_link_quality_cmd *lq)
 891 {
 892         int i;
 893         IWL_DEBUG_RATE(priv, "lq station id 0x%x\n", lq->sta_id);
 894         IWL_DEBUG_RATE(priv, "lq ant 0x%X 0x%X\n",
 895                        lq->general_params.single_stream_ant_msk,
 896                        lq->general_params.dual_stream_ant_msk);
 897
 898         for (i = 0; i < LINK_QUAL_MAX_RETRY_NUM; i++)
 899                 IWL_DEBUG_RATE(priv, "lq index %d 0x%X\n",
 900                                i, lq->rs_table[i].rate_n_flags);
 901 }
 902 #else
 903 static inline void iwl_dump_lq_cmd(struct iwl_priv *priv,
 904                                    struct iwl_link_quality_cmd *lq)
 905 {
 906 }
 907 #endif
 908
 909 int iwl_send_lq_cmd(struct iwl_priv *priv,
 910                     struct iwl_link_quality_cmd *lq, u8 flags)
 911 {
 912         struct iwl_host_cmd cmd = {
 913                 .id = REPLY_TX_LINK_QUALITY_CMD,
 914                 .len = sizeof(struct iwl_link_quality_cmd),
 915                 .flags = flags,
 916                 .data = lq,
 917         };
 918
 919         if ((lq->sta_id == 0xFF) &&
 920             (priv->iw_mode == NL80211_IFTYPE_ADHOC))
 921                 return -EINVAL;
 922
 923         if (lq->sta_id == 0xFF)
 924                 lq->sta_id = IWL_AP_ID;
 925
 926         iwl_dump_lq_cmd(priv, lq);
 927
 928         if (iwl_is_associated(priv) && priv->assoc_station_added)
 929                 return  iwl_send_cmd(priv, &cmd);
 930
 931         return 0;
 932 }
 933 EXPORT_SYMBOL(iwl_send_lq_cmd);
 934
 935 /**
 936  * iwl_sta_init_lq - Initialize a station's hardware rate table
 937  *
 938  * The uCode's station table contains a table of fallback rates
 939  * for automatic fallback during transmission.
 940  *
 941  * NOTE: This sets up a default set of values.  These will be replaced later
 942  *       if the driver's iwl-agn-rs rate scaling algorithm is used, instead of
 943  *       rc80211_simple.
 944  *
 945  * NOTE: Run REPLY_ADD_STA command to set up station table entry, before
 946  *       calling this function (which runs REPLY_TX_LINK_QUALITY_CMD,
 947  *       which requires station table entry to exist).
 948  */
 949 static void iwl_sta_init_lq(struct iwl_priv *priv, const u8 *addr, bool is_ap)
 950 {
 951         int i, r;
 952         struct iwl_link_quality_cmd link_cmd = {
 953                 .reserved1 = 0,
 954         };
 955         u32 rate_flags;
 956
 957         /* Set up the rate scaling to start at selected rate, fall back
 958          * all the way down to 1M in IEEE order, and then spin on 1M */
 959         if (is_ap)
 960                 r = IWL_RATE_54M_INDEX;
 961         else if (priv->band == IEEE80211_BAND_5GHZ)
 962                 r = IWL_RATE_6M_INDEX;
 963         else
 964                 r = IWL_RATE_1M_INDEX;
 965
 966         for (i = 0; i < LINK_QUAL_MAX_RETRY_NUM; i++) {
 967                 rate_flags = 0;
 968                 if (r >= IWL_FIRST_CCK_RATE && r <= IWL_LAST_CCK_RATE)
 969                         rate_flags |= RATE_MCS_CCK_MSK;
 970
 971                 rate_flags |= first_antenna(priv->hw_params.valid_tx_ant) <<
 972                                 RATE_MCS_ANT_POS;
 973
 974                 link_cmd.rs_table[i].rate_n_flags =
 975                         iwl_hw_set_rate_n_flags(iwl_rates[r].plcp, rate_flags);
 976                 r = iwl_get_prev_ieee_rate(r);
 977         }
 978
 979         link_cmd.general_params.single_stream_ant_msk =
 980                                 first_antenna(priv->hw_params.valid_tx_ant);
 981         link_cmd.general_params.dual_stream_ant_msk = 3;
 982         link_cmd.agg_params.agg_dis_start_th = LINK_QUAL_AGG_DISABLE_START_DEF;
 983         link_cmd.agg_params.agg_time_limit =
 984                 cpu_to_le16(LINK_QUAL_AGG_TIME_LIMIT_DEF);
 985
 986         /* Update the rate scaling for control frame Tx to AP */
 987         link_cmd.sta_id = is_ap ? IWL_AP_ID : priv->hw_params.bcast_sta_id;
 988
 989         iwl_send_cmd_pdu_async(priv, REPLY_TX_LINK_QUALITY_CMD,
 990                                sizeof(link_cmd), &link_cmd, NULL);
 991 }
 992
 993 /**
 994  * iwl_rxon_add_station - add station into station table.
 995  *
 996  * there is only one AP station with id= IWL_AP_ID
 997  * NOTE: mutex must be held before calling this function
 998  */
 999 int iwl_rxon_add_station(struct iwl_priv *priv, const u8 *addr, bool is_ap)
1000 {
1001         struct ieee80211_sta *sta;
1002         struct ieee80211_sta_ht_cap ht_config;
1003         struct ieee80211_sta_ht_cap *cur_ht_config = NULL;
1004         u8 sta_id;
1005
1006         /* Add station to device's station table */
1007
1008         /*
1009          * XXX: This check is definitely not correct, if we're an AP
1010          *      it'll always be false which is not what we want, but
1011          *      it doesn't look like iwlagn is prepared to be an HT
1012          *      AP anyway.
1013          */
1014         if (priv->current_ht_config.is_ht) {
1015                 rcu_read_lock();
1016                 sta = ieee80211_find_sta(priv->vif, addr);
1017                 if (sta) {
1018                         memcpy(&ht_config, &sta->ht_cap, sizeof(ht_config));
1019                         cur_ht_config = &ht_config;
1020                 }
1021                 rcu_read_unlock();
1022         }
1023
1024         sta_id = iwl_add_station(priv, addr, is_ap, CMD_SYNC, cur_ht_config);
1025
1026         /* Set up default rate scaling table in device's station table */
1027         iwl_sta_init_lq(priv, addr, is_ap);
1028
1029         return sta_id;
1030 }
1031 EXPORT_SYMBOL(iwl_rxon_add_station);
1032
1033 /**
1034  * iwl_sta_init_bcast_lq - Initialize a bcast station's hardware rate table
1035  *
1036  * NOTE: Run REPLY_ADD_STA command to set up station table entry, before
1037  *       calling this function (which runs REPLY_TX_LINK_QUALITY_CMD,
1038  *       which requires station table entry to exist).
1039  */
1040 static void iwl_sta_init_bcast_lq(struct iwl_priv *priv)
1041 {
1042         int i, r;
1043         struct iwl_link_quality_cmd link_cmd = {
1044                 .reserved1 = 0,
1045         };
1046         u32 rate_flags;
1047
1048         /* Set up the rate scaling to start at selected rate, fall back
1049          * all the way down to 1M in IEEE order, and then spin on 1M */
1050         if (priv->band == IEEE80211_BAND_5GHZ)
1051                 r = IWL_RATE_6M_INDEX;
1052         else
1053                 r = IWL_RATE_1M_INDEX;
1054
1055         for (i = 0; i < LINK_QUAL_MAX_RETRY_NUM; i++) {
1056                 rate_flags = 0;
1057                 if (r >= IWL_FIRST_CCK_RATE && r <= IWL_LAST_CCK_RATE)
1058                         rate_flags |= RATE_MCS_CCK_MSK;
1059
1060                 rate_flags |= first_antenna(priv->hw_params.valid_tx_ant) <<
1061                                 RATE_MCS_ANT_POS;
1062
1063                 link_cmd.rs_table[i].rate_n_flags =
1064                         iwl_hw_set_rate_n_flags(iwl_rates[r].plcp, rate_flags);
1065                 r = iwl_get_prev_ieee_rate(r);
1066         }
1067
1068         link_cmd.general_params.single_stream_ant_msk =
1069                                 first_antenna(priv->hw_params.valid_tx_ant);
1070         link_cmd.general_params.dual_stream_ant_msk = 3;
1071         link_cmd.agg_params.agg_dis_start_th = LINK_QUAL_AGG_DISABLE_START_DEF;
1072         link_cmd.agg_params.agg_time_limit =
1073                 cpu_to_le16(LINK_QUAL_AGG_TIME_LIMIT_DEF);
1074
1075         /* Update the rate scaling for control frame Tx to AP */
1076         link_cmd.sta_id = priv->hw_params.bcast_sta_id;
1077
1078         iwl_send_cmd_pdu_async(priv, REPLY_TX_LINK_QUALITY_CMD,
1079                                sizeof(link_cmd), &link_cmd, NULL);
1080 }
1081
1082
1083 /**
1084  * iwl_add_bcast_station - add broadcast station into station table.
1085  */
1086 void iwl_add_bcast_station(struct iwl_priv *priv)
1087 {
1088         iwl_add_station(priv, iwl_bcast_addr, false, CMD_SYNC, NULL);
1089
1090         /* Set up default rate scaling table in device's station table */
1091         iwl_sta_init_bcast_lq(priv);
1092 }
1093 EXPORT_SYMBOL(iwl_add_bcast_station);
1094
1095 /**
1096  * iwl_get_sta_id - Find station's index within station table
1097  *
1098  * If new IBSS station, create new entry in station table
1099  */
1100 int iwl_get_sta_id(struct iwl_priv *priv, struct ieee80211_hdr *hdr)
1101 {
1102         int sta_id;
1103         __le16 fc = hdr->frame_control;
1104
1105         /* If this frame is broadcast or management, use broadcast station id */
1106         if (!ieee80211_is_data(fc) ||  is_multicast_ether_addr(hdr->addr1))
1107                 return priv->hw_params.bcast_sta_id;
1108
1109         switch (priv->iw_mode) {
1110
1111         /* If we are a client station in a BSS network, use the special
1112          * AP station entry (that's the only station we communicate with) */
1113         case NL80211_IFTYPE_STATION:
1114                 return IWL_AP_ID;
1115
1116         /* If we are an AP, then find the station, or use BCAST */
1117         case NL80211_IFTYPE_AP:
1118                 sta_id = iwl_find_station(priv, hdr->addr1);
1119                 if (sta_id != IWL_INVALID_STATION)
1120                         return sta_id;
1121                 return priv->hw_params.bcast_sta_id;
1122
1123         /* If this frame is going out to an IBSS network, find the station,
1124          * or create a new station table entry */
1125         case NL80211_IFTYPE_ADHOC:
1126                 sta_id = iwl_find_station(priv, hdr->addr1);
1127                 if (sta_id != IWL_INVALID_STATION)
1128                         return sta_id;
1129
1130                 /* Create new station table entry */
1131                 sta_id = iwl_add_station(priv, hdr->addr1, false,
1132                                         CMD_ASYNC, NULL);
1133
1134                 if (sta_id != IWL_INVALID_STATION)
1135                         return sta_id;
1136
1137                 IWL_DEBUG_DROP(priv, "Station %pM not in station map. "
1138                                "Defaulting to broadcast...\n",
1139                                hdr->addr1);
1140                 iwl_print_hex_dump(priv, IWL_DL_DROP, (u8 *) hdr, sizeof(*hdr));
1141                 return priv->hw_params.bcast_sta_id;
1142
1143         default:
1144                 IWL_WARN(priv, "Unknown mode of operation: %d\n",
1145                         priv->iw_mode);
1146                 return priv->hw_params.bcast_sta_id;
1147         }
1148 }
1149 EXPORT_SYMBOL(iwl_get_sta_id);
1150
1151 /**
1152  * iwl_sta_tx_modify_enable_tid - Enable Tx for this TID in station table
1153  */
1154 void iwl_sta_tx_modify_enable_tid(struct iwl_priv *priv, int sta_id, int tid)
1155 {
1156         unsigned long flags;
1157
1158         /* Remove "disable" flag, to enable Tx for this TID */
1159         spin_lock_irqsave(&priv->sta_lock, flags);
1160         priv->stations[sta_id].sta.sta.modify_mask = STA_MODIFY_TID_DISABLE_TX;
1161         priv->stations[sta_id].sta.tid_disable_tx &= cpu_to_le16(~(1 << tid));
1162         priv->stations[sta_id].sta.mode = STA_CONTROL_MODIFY_MSK;
1163         spin_unlock_irqrestore(&priv->sta_lock, flags);
1164
1165         iwl_send_add_sta(priv, &priv->stations[sta_id].sta, CMD_ASYNC);
1166 }
1167 EXPORT_SYMBOL(iwl_sta_tx_modify_enable_tid);
1168
1169 int iwl_sta_rx_agg_start(struct iwl_priv *priv,
1170                          const u8 *addr, int tid, u16 ssn)
1171 {
1172         unsigned long flags;
1173         int sta_id;
1174
1175         sta_id = iwl_find_station(priv, addr);
1176         if (sta_id == IWL_INVALID_STATION)
1177                 return -ENXIO;
1178
1179         spin_lock_irqsave(&priv->sta_lock, flags);
1180         priv->stations[sta_id].sta.station_flags_msk = 0;
1181         priv->stations[sta_id].sta.sta.modify_mask = STA_MODIFY_ADDBA_TID_MSK;
1182         priv->stations[sta_id].sta.add_immediate_ba_tid = (u8)tid;
1183         priv->stations[sta_id].sta.add_immediate_ba_ssn = cpu_to_le16(ssn);
1184         priv->stations[sta_id].sta.mode = STA_CONTROL_MODIFY_MSK;
1185         spin_unlock_irqrestore(&priv->sta_lock, flags);
1186
1187         return iwl_send_add_sta(priv, &priv->stations[sta_id].sta,
1188                                         CMD_ASYNC);
1189 }
1190 EXPORT_SYMBOL(iwl_sta_rx_agg_start);
1191
1192 int iwl_sta_rx_agg_stop(struct iwl_priv *priv, const u8 *addr, int tid)
1193 {
1194         unsigned long flags;
1195         int sta_id;
1196
1197         sta_id = iwl_find_station(priv, addr);
1198         if (sta_id == IWL_INVALID_STATION) {
1199                 IWL_ERR(priv, "Invalid station for AGG tid %d\n", tid);
1200                 return -ENXIO;
1201         }
1202
1203         spin_lock_irqsave(&priv->sta_lock, flags);
1204         priv->stations[sta_id].sta.station_flags_msk = 0;
1205         priv->stations[sta_id].sta.sta.modify_mask = STA_MODIFY_DELBA_TID_MSK;
1206         priv->stations[sta_id].sta.remove_immediate_ba_tid = (u8)tid;
1207         priv->stations[sta_id].sta.mode = STA_CONTROL_MODIFY_MSK;
1208         spin_unlock_irqrestore(&priv->sta_lock, flags);
1209
1210         return iwl_send_add_sta(priv, &priv->stations[sta_id].sta,
1211                                         CMD_ASYNC);
1212 }
1213 EXPORT_SYMBOL(iwl_sta_rx_agg_stop);
1214
1215 void iwl_sta_modify_ps_wake(struct iwl_priv *priv, int sta_id)
1216 {
1217         unsigned long flags;
1218
1219         spin_lock_irqsave(&priv->sta_lock, flags);
1220         priv->stations[sta_id].sta.station_flags &= ~STA_FLG_PWR_SAVE_MSK;
1221         priv->stations[sta_id].sta.station_flags_msk = STA_FLG_PWR_SAVE_MSK;
1222         priv->stations[sta_id].sta.sta.modify_mask = 0;
1223         priv->stations[sta_id].sta.sleep_tx_count = 0;
1224         priv->stations[sta_id].sta.mode = STA_CONTROL_MODIFY_MSK;
1225         spin_unlock_irqrestore(&priv->sta_lock, flags);
1226
1227         iwl_send_add_sta(priv, &priv->stations[sta_id].sta, CMD_ASYNC);
1228 }
1229 EXPORT_SYMBOL(iwl_sta_modify_ps_wake);
1230
1231 void iwl_sta_modify_sleep_tx_count(struct iwl_priv *priv, int sta_id, int cnt)
1232 {
1233         unsigned long flags;
1234
1235         spin_lock_irqsave(&priv->sta_lock, flags);
1236         priv->stations[sta_id].sta.station_flags |= STA_FLG_PWR_SAVE_MSK;
1237         priv->stations[sta_id].sta.station_flags_msk = STA_FLG_PWR_SAVE_MSK;
1238         priv->stations[sta_id].sta.sta.modify_mask =
1239                                         STA_MODIFY_SLEEP_TX_COUNT_MSK;
1240         priv->stations[sta_id].sta.sleep_tx_count = cpu_to_le16(cnt);
1241         priv->stations[sta_id].sta.mode = STA_CONTROL_MODIFY_MSK;
1242         spin_unlock_irqrestore(&priv->sta_lock, flags);
1243
1244         iwl_send_add_sta(priv, &priv->stations[sta_id].sta, CMD_ASYNC);
1245 }