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

   1 /******************************************************************************
   2  *
   3  * Copyright(c) 2003 - 2009 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
 168         priv->alloc_rxb_page--;
 169         free_pages(cmd.reply_page, priv->hw_params.rx_page_order);
 170
 171         return ret;
 172 }
 173 EXPORT_SYMBOL(iwl_send_add_sta);
 174
 175 static void iwl_set_ht_add_station(struct iwl_priv *priv, u8 index,
 176                                    struct ieee80211_sta_ht_cap *sta_ht_inf)
 177 {
 178         __le32 sta_flags;
 179         u8 mimo_ps_mode;
 180
 181         if (!sta_ht_inf || !sta_ht_inf->ht_supported)
 182                 goto done;
 183
 184         mimo_ps_mode = (sta_ht_inf->cap & IEEE80211_HT_CAP_SM_PS) >> 2;
 185
 186         sta_flags = priv->stations[index].sta.station_flags;
 187
 188         sta_flags &= ~(STA_FLG_RTS_MIMO_PROT_MSK | STA_FLG_MIMO_DIS_MSK);
 189
 190         switch (mimo_ps_mode) {
 191         case WLAN_HT_CAP_SM_PS_STATIC:
 192                 sta_flags |= STA_FLG_MIMO_DIS_MSK;
 193                 break;
 194         case WLAN_HT_CAP_SM_PS_DYNAMIC:
 195                 sta_flags |= STA_FLG_RTS_MIMO_PROT_MSK;
 196                 break;
 197         case WLAN_HT_CAP_SM_PS_DISABLED:
 198                 break;
 199         default:
 200                 IWL_WARN(priv, "Invalid MIMO PS mode %d\n", mimo_ps_mode);
 201                 break;
 202         }
 203
 204         sta_flags |= cpu_to_le32(
 205               (u32)sta_ht_inf->ampdu_factor << STA_FLG_MAX_AGG_SIZE_POS);
 206
 207         sta_flags |= cpu_to_le32(
 208               (u32)sta_ht_inf->ampdu_density << STA_FLG_AGG_MPDU_DENSITY_POS);
 209
 210         if (iwl_is_ht40_tx_allowed(priv, sta_ht_inf))
 211                 sta_flags |= STA_FLG_HT40_EN_MSK;
 212         else
 213                 sta_flags &= ~STA_FLG_HT40_EN_MSK;
 214
 215         priv->stations[index].sta.station_flags = sta_flags;
 216  done:
 217         return;
 218 }
 219
 220 /**
 221  * iwl_add_station - Add station to tables in driver and device
 222  */
 223 u8 iwl_add_station(struct iwl_priv *priv, const u8 *addr, bool is_ap, u8 flags,
 224                 struct ieee80211_sta_ht_cap *ht_info)
 225 {
 226         struct iwl_station_entry *station;
 227         unsigned long flags_spin;
 228         int i;
 229         int sta_id = IWL_INVALID_STATION;
 230         u16 rate;
 231
 232         spin_lock_irqsave(&priv->sta_lock, flags_spin);
 233         if (is_ap)
 234                 sta_id = IWL_AP_ID;
 235         else if (is_broadcast_ether_addr(addr))
 236                 sta_id = priv->hw_params.bcast_sta_id;
 237         else
 238                 for (i = IWL_STA_ID; i < priv->hw_params.max_stations; i++) {
 239                         if (!compare_ether_addr(priv->stations[i].sta.sta.addr,
 240                                                 addr)) {
 241                                 sta_id = i;
 242                                 break;
 243                         }
 244
 245                         if (!priv->stations[i].used &&
 246                             sta_id == IWL_INVALID_STATION)
 247                                 sta_id = i;
 248                 }
 249
 250         /* These two conditions have the same outcome, but keep them separate
 251            since they have different meanings */
 252         if (unlikely(sta_id == IWL_INVALID_STATION)) {
 253                 spin_unlock_irqrestore(&priv->sta_lock, flags_spin);
 254                 return sta_id;
 255         }
 256
 257         if (priv->stations[sta_id].used &&
 258             !compare_ether_addr(priv->stations[sta_id].sta.sta.addr, addr)) {
 259                 spin_unlock_irqrestore(&priv->sta_lock, flags_spin);
 260                 return sta_id;
 261         }
 262
 263
 264         station = &priv->stations[sta_id];
 265         station->used = IWL_STA_DRIVER_ACTIVE;
 266         IWL_DEBUG_ASSOC(priv, "Add STA to driver ID %d: %pM\n",
 267                         sta_id, addr);
 268         priv->num_stations++;
 269
 270         /* Set up the REPLY_ADD_STA command to send to device */
 271         memset(&station->sta, 0, sizeof(struct iwl_addsta_cmd));
 272         memcpy(station->sta.sta.addr, addr, ETH_ALEN);
 273         station->sta.mode = 0;
 274         station->sta.sta.sta_id = sta_id;
 275         station->sta.station_flags = 0;
 276
 277         /* BCAST station and IBSS stations do not work in HT mode */
 278         if (sta_id != priv->hw_params.bcast_sta_id &&
 279             priv->iw_mode != NL80211_IFTYPE_ADHOC)
 280                 iwl_set_ht_add_station(priv, sta_id, ht_info);
 281
 282         /* 3945 only */
 283         rate = (priv->band == IEEE80211_BAND_5GHZ) ?
 284                 IWL_RATE_6M_PLCP : IWL_RATE_1M_PLCP;
 285         /* Turn on both antennas for the station... */
 286         station->sta.rate_n_flags = cpu_to_le16(rate | RATE_MCS_ANT_AB_MSK);
 287
 288         spin_unlock_irqrestore(&priv->sta_lock, flags_spin);
 289
 290         /* Add station to device's station table */
 291         iwl_send_add_sta(priv, &station->sta, flags);
 292         return sta_id;
 293
 294 }
 295 EXPORT_SYMBOL(iwl_add_station);
 296
 297 static void iwl_sta_ucode_deactivate(struct iwl_priv *priv, const char *addr)
 298 {
 299         unsigned long flags;
 300         u8 sta_id = iwl_find_station(priv, addr);
 301
 302         BUG_ON(sta_id == IWL_INVALID_STATION);
 303
 304         IWL_DEBUG_ASSOC(priv, "Removed STA from Ucode: %pM\n", addr);
 305
 306         spin_lock_irqsave(&priv->sta_lock, flags);
 307
 308         /* Ucode must be active and driver must be non active */
 309         if (priv->stations[sta_id].used != IWL_STA_UCODE_ACTIVE)
 310                 IWL_ERR(priv, "removed non active STA %d\n", sta_id);
 311
 312         priv->stations[sta_id].used &= ~IWL_STA_UCODE_ACTIVE;
 313
 314         memset(&priv->stations[sta_id], 0, sizeof(struct iwl_station_entry));
 315         spin_unlock_irqrestore(&priv->sta_lock, flags);
 316 }
 317
 318 static void iwl_remove_sta_callback(struct iwl_priv *priv,
 319                                     struct iwl_device_cmd *cmd,
 320                                     struct iwl_rx_packet *pkt)
 321 {
 322         struct iwl_rem_sta_cmd *rm_sta =
 323                         (struct iwl_rem_sta_cmd *)cmd->cmd.payload;
 324         const char *addr = rm_sta->addr;
 325
 326         if (pkt->hdr.flags & IWL_CMD_FAILED_MSK) {
 327                 IWL_ERR(priv, "Bad return from REPLY_REMOVE_STA (0x%08X)\n",
 328                 pkt->hdr.flags);
 329                 return;
 330         }
 331
 332         switch (pkt->u.rem_sta.status) {
 333         case REM_STA_SUCCESS_MSK:
 334                 iwl_sta_ucode_deactivate(priv, addr);
 335                 break;
 336         default:
 337                 IWL_ERR(priv, "REPLY_REMOVE_STA failed\n");
 338                 break;
 339         }
 340 }
 341
 342 static int iwl_send_remove_station(struct iwl_priv *priv, const u8 *addr,
 343                                    u8 flags)
 344 {
 345         struct iwl_rx_packet *pkt;
 346         int ret;
 347
 348         struct iwl_rem_sta_cmd rm_sta_cmd;
 349
 350         struct iwl_host_cmd cmd = {
 351                 .id = REPLY_REMOVE_STA,
 352                 .len = sizeof(struct iwl_rem_sta_cmd),
 353                 .flags = flags,
 354                 .data = &rm_sta_cmd,
 355         };
 356
 357         memset(&rm_sta_cmd, 0, sizeof(rm_sta_cmd));
 358         rm_sta_cmd.num_sta = 1;
 359         memcpy(&rm_sta_cmd.addr, addr , ETH_ALEN);
 360
 361         if (flags & CMD_ASYNC)
 362                 cmd.callback = iwl_remove_sta_callback;
 363         else
 364                 cmd.flags |= CMD_WANT_SKB;
 365         ret = iwl_send_cmd(priv, &cmd);
 366
 367         if (ret || (flags & CMD_ASYNC))
 368                 return ret;
 369
 370         pkt = (struct iwl_rx_packet *)cmd.reply_page;
 371         if (pkt->hdr.flags & IWL_CMD_FAILED_MSK) {
 372                 IWL_ERR(priv, "Bad return from REPLY_REMOVE_STA (0x%08X)\n",
 373                           pkt->hdr.flags);
 374                 ret = -EIO;
 375         }
 376
 377         if (!ret) {
 378                 switch (pkt->u.rem_sta.status) {
 379                 case REM_STA_SUCCESS_MSK:
 380                         iwl_sta_ucode_deactivate(priv, addr);
 381                         IWL_DEBUG_ASSOC(priv, "REPLY_REMOVE_STA PASSED\n");
 382                         break;
 383                 default:
 384                         ret = -EIO;
 385                         IWL_ERR(priv, "REPLY_REMOVE_STA failed\n");
 386                         break;
 387                 }
 388         }
 389
 390         priv->alloc_rxb_page--;
 391         free_pages(cmd.reply_page, priv->hw_params.rx_page_order);
 392
 393         return ret;
 394 }
 395
 396 /**
 397  * iwl_remove_station - Remove driver's knowledge of station.
 398  */
 399 int iwl_remove_station(struct iwl_priv *priv, const u8 *addr, bool is_ap)
 400 {
 401         int sta_id = IWL_INVALID_STATION;
 402         int i, ret = -EINVAL;
 403         unsigned long flags;
 404
 405         spin_lock_irqsave(&priv->sta_lock, flags);
 406
 407         if (is_ap)
 408                 sta_id = IWL_AP_ID;
 409         else if (is_broadcast_ether_addr(addr))
 410                 sta_id = priv->hw_params.bcast_sta_id;
 411         else
 412                 for (i = IWL_STA_ID; i < priv->hw_params.max_stations; i++)
 413                         if (priv->stations[i].used &&
 414                             !compare_ether_addr(priv->stations[i].sta.sta.addr,
 415                                                 addr)) {
 416                                 sta_id = i;
 417                                 break;
 418                         }
 419
 420         if (unlikely(sta_id == IWL_INVALID_STATION))
 421                 goto out;
 422
 423         IWL_DEBUG_ASSOC(priv, "Removing STA from driver:%d  %pM\n",
 424                 sta_id, addr);
 425
 426         if (!(priv->stations[sta_id].used & IWL_STA_DRIVER_ACTIVE)) {
 427                 IWL_ERR(priv, "Removing %pM but non DRIVER active\n",
 428                                 addr);
 429                 goto out;
 430         }
 431
 432         if (!(priv->stations[sta_id].used & IWL_STA_UCODE_ACTIVE)) {
 433                 IWL_ERR(priv, "Removing %pM but non UCODE active\n",
 434                                 addr);
 435                 goto out;
 436         }
 437
 438
 439         priv->stations[sta_id].used &= ~IWL_STA_DRIVER_ACTIVE;
 440
 441         priv->num_stations--;
 442
 443         BUG_ON(priv->num_stations < 0);
 444
 445         spin_unlock_irqrestore(&priv->sta_lock, flags);
 446
 447         ret = iwl_send_remove_station(priv, addr, CMD_ASYNC);
 448         return ret;
 449 out:
 450         spin_unlock_irqrestore(&priv->sta_lock, flags);
 451         return ret;
 452 }
 453
 454 /**
 455  * iwl_clear_stations_table - Clear the driver's station table
 456  *
 457  * NOTE:  This does not clear or otherwise alter the device's station table.
 458  */
 459 void iwl_clear_stations_table(struct iwl_priv *priv)
 460 {
 461         unsigned long flags;
 462         int i;
 463
 464         spin_lock_irqsave(&priv->sta_lock, flags);
 465
 466         if (iwl_is_alive(priv) &&
 467            !test_bit(STATUS_EXIT_PENDING, &priv->status) &&
 468            iwl_send_cmd_pdu_async(priv, REPLY_REMOVE_ALL_STA, 0, NULL, NULL))
 469                 IWL_ERR(priv, "Couldn't clear the station table\n");
 470
 471         priv->num_stations = 0;
 472         memset(priv->stations, 0, sizeof(priv->stations));
 473
 474         /* clean ucode key table bit map */
 475         priv->ucode_key_table = 0;
 476
 477         /* keep track of static keys */
 478         for (i = 0; i < WEP_KEYS_MAX ; i++) {
 479                 if (priv->wep_keys[i].key_size)
 480                         set_bit(i, &priv->ucode_key_table);
 481         }
 482
 483         spin_unlock_irqrestore(&priv->sta_lock, flags);
 484 }
 485 EXPORT_SYMBOL(iwl_clear_stations_table);
 486
 487 int iwl_get_free_ucode_key_index(struct iwl_priv *priv)
 488 {
 489         int i;
 490
 491         for (i = 0; i < STA_KEY_MAX_NUM; i++)
 492                 if (!test_and_set_bit(i, &priv->ucode_key_table))
 493                         return i;
 494
 495         return WEP_INVALID_OFFSET;
 496 }
 497 EXPORT_SYMBOL(iwl_get_free_ucode_key_index);
 498
 499 int iwl_send_static_wepkey_cmd(struct iwl_priv *priv, u8 send_if_empty)
 500 {
 501         int i, not_empty = 0;
 502         u8 buff[sizeof(struct iwl_wep_cmd) +
 503                 sizeof(struct iwl_wep_key) * WEP_KEYS_MAX];
 504         struct iwl_wep_cmd *wep_cmd = (struct iwl_wep_cmd *)buff;
 505         size_t cmd_size  = sizeof(struct iwl_wep_cmd);
 506         struct iwl_host_cmd cmd = {
 507                 .id = REPLY_WEPKEY,
 508                 .data = wep_cmd,
 509                 .flags = CMD_ASYNC,
 510         };
 511
 512         memset(wep_cmd, 0, cmd_size +
 513                         (sizeof(struct iwl_wep_key) * WEP_KEYS_MAX));
 514
 515         for (i = 0; i < WEP_KEYS_MAX ; i++) {
 516                 wep_cmd->key[i].key_index = i;
 517                 if (priv->wep_keys[i].key_size) {
 518                         wep_cmd->key[i].key_offset = i;
 519                         not_empty = 1;
 520                 } else {
 521                         wep_cmd->key[i].key_offset = WEP_INVALID_OFFSET;
 522                 }
 523
 524                 wep_cmd->key[i].key_size = priv->wep_keys[i].key_size;
 525                 memcpy(&wep_cmd->key[i].key[3], priv->wep_keys[i].key,
 526                                 priv->wep_keys[i].key_size);
 527         }
 528
 529         wep_cmd->global_key_type = WEP_KEY_WEP_TYPE;
 530         wep_cmd->num_keys = WEP_KEYS_MAX;
 531
 532         cmd_size += sizeof(struct iwl_wep_key) * WEP_KEYS_MAX;
 533
 534         cmd.len = cmd_size;
 535
 536         if (not_empty || send_if_empty)
 537                 return iwl_send_cmd(priv, &cmd);
 538         else
 539                 return 0;
 540 }
 541 EXPORT_SYMBOL(iwl_send_static_wepkey_cmd);
 542
 543 int iwl_remove_default_wep_key(struct iwl_priv *priv,
 544                                struct ieee80211_key_conf *keyconf)
 545 {
 546         int ret;
 547         unsigned long flags;
 548
 549         spin_lock_irqsave(&priv->sta_lock, flags);
 550         IWL_DEBUG_WEP(priv, "Removing default WEP key: idx=%d\n",
 551                       keyconf->keyidx);
 552
 553         if (!test_and_clear_bit(keyconf->keyidx, &priv->ucode_key_table))
 554                 IWL_ERR(priv, "index %d not used in uCode key table.\n",
 555                           keyconf->keyidx);
 556
 557         priv->default_wep_key--;
 558         memset(&priv->wep_keys[keyconf->keyidx], 0, sizeof(priv->wep_keys[0]));
 559         if (iwl_is_rfkill(priv)) {
 560                 IWL_DEBUG_WEP(priv, "Not sending REPLY_WEPKEY command due to RFKILL.\n");
 561                 spin_unlock_irqrestore(&priv->sta_lock, flags);
 562                 return 0;
 563         }
 564         ret = iwl_send_static_wepkey_cmd(priv, 1);
 565         IWL_DEBUG_WEP(priv, "Remove default WEP key: idx=%d ret=%d\n",
 566                       keyconf->keyidx, ret);
 567         spin_unlock_irqrestore(&priv->sta_lock, flags);
 568
 569         return ret;
 570 }
 571 EXPORT_SYMBOL(iwl_remove_default_wep_key);
 572
 573 int iwl_set_default_wep_key(struct iwl_priv *priv,
 574                             struct ieee80211_key_conf *keyconf)
 575 {
 576         int ret;
 577         unsigned long flags;
 578
 579         if (keyconf->keylen != WEP_KEY_LEN_128 &&
 580             keyconf->keylen != WEP_KEY_LEN_64) {
 581                 IWL_DEBUG_WEP(priv, "Bad WEP key length %d\n", keyconf->keylen);
 582                 return -EINVAL;
 583         }
 584
 585         keyconf->flags &= ~IEEE80211_KEY_FLAG_GENERATE_IV;
 586         keyconf->hw_key_idx = HW_KEY_DEFAULT;
 587         priv->stations[IWL_AP_ID].keyinfo.alg = ALG_WEP;
 588
 589         spin_lock_irqsave(&priv->sta_lock, flags);
 590         priv->default_wep_key++;
 591
 592         if (test_and_set_bit(keyconf->keyidx, &priv->ucode_key_table))
 593                 IWL_ERR(priv, "index %d already used in uCode key table.\n",
 594                         keyconf->keyidx);
 595
 596         priv->wep_keys[keyconf->keyidx].key_size = keyconf->keylen;
 597         memcpy(&priv->wep_keys[keyconf->keyidx].key, &keyconf->key,
 598                                                         keyconf->keylen);
 599
 600         ret = iwl_send_static_wepkey_cmd(priv, 0);
 601         IWL_DEBUG_WEP(priv, "Set default WEP key: len=%d idx=%d ret=%d\n",
 602                 keyconf->keylen, keyconf->keyidx, ret);
 603         spin_unlock_irqrestore(&priv->sta_lock, flags);
 604
 605         return ret;
 606 }
 607 EXPORT_SYMBOL(iwl_set_default_wep_key);
 608
 609 static int iwl_set_wep_dynamic_key_info(struct iwl_priv *priv,
 610                                 struct ieee80211_key_conf *keyconf,
 611                                 u8 sta_id)
 612 {
 613         unsigned long flags;
 614         __le16 key_flags = 0;
 615         int ret;
 616
 617         keyconf->flags &= ~IEEE80211_KEY_FLAG_GENERATE_IV;
 618
 619         key_flags |= (STA_KEY_FLG_WEP | STA_KEY_FLG_MAP_KEY_MSK);
 620         key_flags |= cpu_to_le16(keyconf->keyidx << STA_KEY_FLG_KEYID_POS);
 621         key_flags &= ~STA_KEY_FLG_INVALID;
 622
 623         if (keyconf->keylen == WEP_KEY_LEN_128)
 624                 key_flags |= STA_KEY_FLG_KEY_SIZE_MSK;
 625
 626         if (sta_id == priv->hw_params.bcast_sta_id)
 627                 key_flags |= STA_KEY_MULTICAST_MSK;
 628
 629         spin_lock_irqsave(&priv->sta_lock, flags);
 630
 631         priv->stations[sta_id].keyinfo.alg = keyconf->alg;
 632         priv->stations[sta_id].keyinfo.keylen = keyconf->keylen;
 633         priv->stations[sta_id].keyinfo.keyidx = keyconf->keyidx;
 634
 635         memcpy(priv->stations[sta_id].keyinfo.key,
 636                                 keyconf->key, keyconf->keylen);
 637
 638         memcpy(&priv->stations[sta_id].sta.key.key[3],
 639                                 keyconf->key, keyconf->keylen);
 640
 641         if ((priv->stations[sta_id].sta.key.key_flags & STA_KEY_FLG_ENCRYPT_MSK)
 642                         == STA_KEY_FLG_NO_ENC)
 643                 priv->stations[sta_id].sta.key.key_offset =
 644                                  iwl_get_free_ucode_key_index(priv);
 645         /* else, we are overriding an existing key => no need to allocated room
 646          * in uCode. */
 647
 648         WARN(priv->stations[sta_id].sta.key.key_offset == WEP_INVALID_OFFSET,
 649                 "no space for a new key");
 650
 651         priv->stations[sta_id].sta.key.key_flags = key_flags;
 652         priv->stations[sta_id].sta.sta.modify_mask = STA_MODIFY_KEY_MASK;
 653         priv->stations[sta_id].sta.mode = STA_CONTROL_MODIFY_MSK;
 654
 655         ret = iwl_send_add_sta(priv, &priv->stations[sta_id].sta, CMD_ASYNC);
 656
 657         spin_unlock_irqrestore(&priv->sta_lock, flags);
 658
 659         return ret;
 660 }
 661
 662 static int iwl_set_ccmp_dynamic_key_info(struct iwl_priv *priv,
 663                                    struct ieee80211_key_conf *keyconf,
 664                                    u8 sta_id)
 665 {
 666         unsigned long flags;
 667         __le16 key_flags = 0;
 668         int ret;
 669
 670         key_flags |= (STA_KEY_FLG_CCMP | STA_KEY_FLG_MAP_KEY_MSK);
 671         key_flags |= cpu_to_le16(keyconf->keyidx << STA_KEY_FLG_KEYID_POS);
 672         key_flags &= ~STA_KEY_FLG_INVALID;
 673
 674         if (sta_id == priv->hw_params.bcast_sta_id)
 675                 key_flags |= STA_KEY_MULTICAST_MSK;
 676
 677         keyconf->flags |= IEEE80211_KEY_FLAG_GENERATE_IV;
 678
 679         spin_lock_irqsave(&priv->sta_lock, flags);
 680         priv->stations[sta_id].keyinfo.alg = keyconf->alg;
 681         priv->stations[sta_id].keyinfo.keylen = keyconf->keylen;
 682
 683         memcpy(priv->stations[sta_id].keyinfo.key, keyconf->key,
 684                keyconf->keylen);
 685
 686         memcpy(priv->stations[sta_id].sta.key.key, keyconf->key,
 687                keyconf->keylen);
 688
 689         if ((priv->stations[sta_id].sta.key.key_flags & STA_KEY_FLG_ENCRYPT_MSK)
 690                         == STA_KEY_FLG_NO_ENC)
 691                 priv->stations[sta_id].sta.key.key_offset =
 692                                  iwl_get_free_ucode_key_index(priv);
 693         /* else, we are overriding an existing key => no need to allocated room
 694          * in uCode. */
 695
 696         WARN(priv->stations[sta_id].sta.key.key_offset == WEP_INVALID_OFFSET,
 697                 "no space for a new key");
 698
 699         priv->stations[sta_id].sta.key.key_flags = key_flags;
 700         priv->stations[sta_id].sta.sta.modify_mask = STA_MODIFY_KEY_MASK;
 701         priv->stations[sta_id].sta.mode = STA_CONTROL_MODIFY_MSK;
 702
 703         ret = iwl_send_add_sta(priv, &priv->stations[sta_id].sta, CMD_ASYNC);
 704
 705         spin_unlock_irqrestore(&priv->sta_lock, flags);
 706
 707         return ret;
 708 }
 709
 710 static int iwl_set_tkip_dynamic_key_info(struct iwl_priv *priv,
 711                                    struct ieee80211_key_conf *keyconf,
 712                                    u8 sta_id)
 713 {
 714         unsigned long flags;
 715         int ret = 0;
 716         __le16 key_flags = 0;
 717
 718         key_flags |= (STA_KEY_FLG_TKIP | STA_KEY_FLG_MAP_KEY_MSK);
 719         key_flags |= cpu_to_le16(keyconf->keyidx << STA_KEY_FLG_KEYID_POS);
 720         key_flags &= ~STA_KEY_FLG_INVALID;
 721
 722         if (sta_id == priv->hw_params.bcast_sta_id)
 723                 key_flags |= STA_KEY_MULTICAST_MSK;
 724
 725         keyconf->flags |= IEEE80211_KEY_FLAG_GENERATE_IV;
 726         keyconf->flags |= IEEE80211_KEY_FLAG_GENERATE_MMIC;
 727
 728         spin_lock_irqsave(&priv->sta_lock, flags);
 729
 730         priv->stations[sta_id].keyinfo.alg = keyconf->alg;
 731         priv->stations[sta_id].keyinfo.keylen = 16;
 732
 733         if ((priv->stations[sta_id].sta.key.key_flags & STA_KEY_FLG_ENCRYPT_MSK)
 734                         == STA_KEY_FLG_NO_ENC)
 735                 priv->stations[sta_id].sta.key.key_offset =
 736                                  iwl_get_free_ucode_key_index(priv);
 737         /* else, we are overriding an existing key => no need to allocated room
 738          * in uCode. */
 739
 740         WARN(priv->stations[sta_id].sta.key.key_offset == WEP_INVALID_OFFSET,
 741                 "no space for a new key");
 742
 743         priv->stations[sta_id].sta.key.key_flags = key_flags;
 744
 745
 746         /* This copy is acutally not needed: we get the key with each TX */
 747         memcpy(priv->stations[sta_id].keyinfo.key, keyconf->key, 16);
 748
 749         memcpy(priv->stations[sta_id].sta.key.key, keyconf->key, 16);
 750
 751         spin_unlock_irqrestore(&priv->sta_lock, flags);
 752
 753         return ret;
 754 }
 755
 756 void iwl_update_tkip_key(struct iwl_priv *priv,
 757                         struct ieee80211_key_conf *keyconf,
 758                         const u8 *addr, u32 iv32, u16 *phase1key)
 759 {
 760         u8 sta_id = IWL_INVALID_STATION;
 761         unsigned long flags;
 762         int i;
 763
 764         sta_id = iwl_find_station(priv, addr);
 765         if (sta_id == IWL_INVALID_STATION) {
 766                 IWL_DEBUG_MAC80211(priv, "leave - %pM not in station map.\n",
 767                                    addr);
 768                 return;
 769         }
 770
 771         if (iwl_scan_cancel(priv)) {
 772                 /* cancel scan failed, just live w/ bad key and rely
 773                    briefly on SW decryption */
 774                 return;
 775         }
 776
 777         spin_lock_irqsave(&priv->sta_lock, flags);
 778
 779         priv->stations[sta_id].sta.key.tkip_rx_tsc_byte2 = (u8) iv32;
 780
 781         for (i = 0; i < 5; i++)
 782                 priv->stations[sta_id].sta.key.tkip_rx_ttak[i] =
 783                         cpu_to_le16(phase1key[i]);
 784
 785         priv->stations[sta_id].sta.sta.modify_mask = STA_MODIFY_KEY_MASK;
 786         priv->stations[sta_id].sta.mode = STA_CONTROL_MODIFY_MSK;
 787
 788         iwl_send_add_sta(priv, &priv->stations[sta_id].sta, CMD_ASYNC);
 789
 790         spin_unlock_irqrestore(&priv->sta_lock, flags);
 791
 792 }
 793 EXPORT_SYMBOL(iwl_update_tkip_key);
 794
 795 int iwl_remove_dynamic_key(struct iwl_priv *priv,
 796                                 struct ieee80211_key_conf *keyconf,
 797                                 u8 sta_id)
 798 {
 799         unsigned long flags;
 800         int ret = 0;
 801         u16 key_flags;
 802         u8 keyidx;
 803
 804         priv->key_mapping_key--;
 805
 806         spin_lock_irqsave(&priv->sta_lock, flags);
 807         key_flags = le16_to_cpu(priv->stations[sta_id].sta.key.key_flags);
 808         keyidx = (key_flags >> STA_KEY_FLG_KEYID_POS) & 0x3;
 809
 810         IWL_DEBUG_WEP(priv, "Remove dynamic key: idx=%d sta=%d\n",
 811                       keyconf->keyidx, sta_id);
 812
 813         if (keyconf->keyidx != keyidx) {
 814                 /* We need to remove a key with index different that the one
 815                  * in the uCode. This means that the key we need to remove has
 816                  * been replaced by another one with different index.
 817                  * Don't do anything and return ok
 818                  */
 819                 spin_unlock_irqrestore(&priv->sta_lock, flags);
 820                 return 0;
 821         }
 822
 823         if (priv->stations[sta_id].sta.key.key_offset == WEP_INVALID_OFFSET) {
 824                 IWL_WARN(priv, "Removing wrong key %d 0x%x\n",
 825                             keyconf->keyidx, key_flags);
 826                 spin_unlock_irqrestore(&priv->sta_lock, flags);
 827                 return 0;
 828         }
 829
 830         if (!test_and_clear_bit(priv->stations[sta_id].sta.key.key_offset,
 831                 &priv->ucode_key_table))
 832                 IWL_ERR(priv, "index %d not used in uCode key table.\n",
 833                         priv->stations[sta_id].sta.key.key_offset);
 834         memset(&priv->stations[sta_id].keyinfo, 0,
 835                                         sizeof(struct iwl_hw_key));
 836         memset(&priv->stations[sta_id].sta.key, 0,
 837                                         sizeof(struct iwl4965_keyinfo));
 838         priv->stations[sta_id].sta.key.key_flags =
 839                         STA_KEY_FLG_NO_ENC | STA_KEY_FLG_INVALID;
 840         priv->stations[sta_id].sta.key.key_offset = WEP_INVALID_OFFSET;
 841         priv->stations[sta_id].sta.sta.modify_mask = STA_MODIFY_KEY_MASK;
 842         priv->stations[sta_id].sta.mode = STA_CONTROL_MODIFY_MSK;
 843
 844         if (iwl_is_rfkill(priv)) {
 845                 IWL_DEBUG_WEP(priv, "Not sending REPLY_ADD_STA command because RFKILL enabled. \n");
 846                 spin_unlock_irqrestore(&priv->sta_lock, flags);
 847                 return 0;
 848         }
 849         ret =  iwl_send_add_sta(priv, &priv->stations[sta_id].sta, CMD_ASYNC);
 850         spin_unlock_irqrestore(&priv->sta_lock, flags);
 851         return ret;
 852 }
 853 EXPORT_SYMBOL(iwl_remove_dynamic_key);
 854
 855 int iwl_set_dynamic_key(struct iwl_priv *priv,
 856                                 struct ieee80211_key_conf *keyconf, u8 sta_id)
 857 {
 858         int ret;
 859
 860         priv->key_mapping_key++;
 861         keyconf->hw_key_idx = HW_KEY_DYNAMIC;
 862
 863         switch (keyconf->alg) {
 864         case ALG_CCMP:
 865                 ret = iwl_set_ccmp_dynamic_key_info(priv, keyconf, sta_id);
 866                 break;
 867         case ALG_TKIP:
 868                 ret = iwl_set_tkip_dynamic_key_info(priv, keyconf, sta_id);
 869                 break;
 870         case ALG_WEP:
 871                 ret = iwl_set_wep_dynamic_key_info(priv, keyconf, sta_id);
 872                 break;
 873         default:
 874                 IWL_ERR(priv,
 875                         "Unknown alg: %s alg = %d\n", __func__, keyconf->alg);
 876                 ret = -EINVAL;
 877         }
 878
 879         IWL_DEBUG_WEP(priv, "Set dynamic key: alg= %d len=%d idx=%d sta=%d ret=%d\n",
 880                       keyconf->alg, keyconf->keylen, keyconf->keyidx,
 881                       sta_id, ret);
 882
 883         return ret;
 884 }
 885 EXPORT_SYMBOL(iwl_set_dynamic_key);
 886
 887 #ifdef CONFIG_IWLWIFI_DEBUG
 888 static void iwl_dump_lq_cmd(struct iwl_priv *priv,
 889                            struct iwl_link_quality_cmd *lq)
 890 {
 891         int i;
 892         IWL_DEBUG_RATE(priv, "lq station id 0x%x\n", lq->sta_id);
 893         IWL_DEBUG_RATE(priv, "lq ant 0x%X 0x%X\n",
 894                        lq->general_params.single_stream_ant_msk,
 895                        lq->general_params.dual_stream_ant_msk);
 896
 897         for (i = 0; i < LINK_QUAL_MAX_RETRY_NUM; i++)
 898                 IWL_DEBUG_RATE(priv, "lq index %d 0x%X\n",
 899                                i, lq->rs_table[i].rate_n_flags);
 900 }
 901 #else
 902 static inline void iwl_dump_lq_cmd(struct iwl_priv *priv,
 903                                    struct iwl_link_quality_cmd *lq)
 904 {
 905 }
 906 #endif
 907
 908 int iwl_send_lq_cmd(struct iwl_priv *priv,
 909                     struct iwl_link_quality_cmd *lq, u8 flags)
 910 {
 911         struct iwl_host_cmd cmd = {
 912                 .id = REPLY_TX_LINK_QUALITY_CMD,
 913                 .len = sizeof(struct iwl_link_quality_cmd),
 914                 .flags = flags,
 915                 .data = lq,
 916         };
 917
 918         if ((lq->sta_id == 0xFF) &&
 919             (priv->iw_mode == NL80211_IFTYPE_ADHOC))
 920                 return -EINVAL;
 921
 922         if (lq->sta_id == 0xFF)
 923                 lq->sta_id = IWL_AP_ID;
 924
 925         iwl_dump_lq_cmd(priv, lq);
 926
 927         if (iwl_is_associated(priv) && priv->assoc_station_added)
 928                 return  iwl_send_cmd(priv, &cmd);
 929
 930         return 0;
 931 }
 932 EXPORT_SYMBOL(iwl_send_lq_cmd);
 933
 934 /**
 935  * iwl_sta_init_lq - Initialize a station's hardware rate table
 936  *
 937  * The uCode's station table contains a table of fallback rates
 938  * for automatic fallback during transmission.
 939  *
 940  * NOTE: This sets up a default set of values.  These will be replaced later
 941  *       if the driver's iwl-agn-rs rate scaling algorithm is used, instead of
 942  *       rc80211_simple.
 943  *
 944  * NOTE: Run REPLY_ADD_STA command to set up station table entry, before
 945  *       calling this function (which runs REPLY_TX_LINK_QUALITY_CMD,
 946  *       which requires station table entry to exist).
 947  */
 948 static void iwl_sta_init_lq(struct iwl_priv *priv, const u8 *addr, bool is_ap)
 949 {
 950         int i, r;
 951         struct iwl_link_quality_cmd link_cmd = {
 952                 .reserved1 = 0,
 953         };
 954         u32 rate_flags;
 955
 956         /* Set up the rate scaling to start at selected rate, fall back
 957          * all the way down to 1M in IEEE order, and then spin on 1M */
 958         if (is_ap)
 959                 r = IWL_RATE_54M_INDEX;
 960         else if (priv->band == IEEE80211_BAND_5GHZ)
 961                 r = IWL_RATE_6M_INDEX;
 962         else
 963                 r = IWL_RATE_1M_INDEX;
 964
 965         for (i = 0; i < LINK_QUAL_MAX_RETRY_NUM; i++) {
 966                 rate_flags = 0;
 967                 if (r >= IWL_FIRST_CCK_RATE && r <= IWL_LAST_CCK_RATE)
 968                         rate_flags |= RATE_MCS_CCK_MSK;
 969
 970                 rate_flags |= first_antenna(priv->hw_params.valid_tx_ant) <<
 971                                 RATE_MCS_ANT_POS;
 972
 973                 link_cmd.rs_table[i].rate_n_flags =
 974                         iwl_hw_set_rate_n_flags(iwl_rates[r].plcp, rate_flags);
 975                 r = iwl_get_prev_ieee_rate(r);
 976         }
 977
 978         link_cmd.general_params.single_stream_ant_msk =
 979                                 first_antenna(priv->hw_params.valid_tx_ant);
 980         link_cmd.general_params.dual_stream_ant_msk = 3;
 981         link_cmd.agg_params.agg_dis_start_th = LINK_QUAL_AGG_DISABLE_START_DEF;
 982         link_cmd.agg_params.agg_time_limit =
 983                 cpu_to_le16(LINK_QUAL_AGG_TIME_LIMIT_DEF);
 984
 985         /* Update the rate scaling for control frame Tx to AP */
 986         link_cmd.sta_id = is_ap ? IWL_AP_ID : priv->hw_params.bcast_sta_id;
 987
 988         iwl_send_cmd_pdu_async(priv, REPLY_TX_LINK_QUALITY_CMD,
 989                                sizeof(link_cmd), &link_cmd, NULL);
 990 }
 991
 992 /**
 993  * iwl_rxon_add_station - add station into station table.
 994  *
 995  * there is only one AP station with id= IWL_AP_ID
 996  * NOTE: mutex must be held before calling this function
 997  */
 998 int iwl_rxon_add_station(struct iwl_priv *priv, const u8 *addr, bool is_ap)
 999 {
1000         struct ieee80211_sta *sta;
1001         struct ieee80211_sta_ht_cap ht_config;
1002         struct ieee80211_sta_ht_cap *cur_ht_config = NULL;
1003         u8 sta_id;
1004
1005         /* Add station to device's station table */
1006
1007         /*
1008          * XXX: This check is definitely not correct, if we're an AP
1009          *      it'll always be false which is not what we want, but
1010          *      it doesn't look like iwlagn is prepared to be an HT
1011          *      AP anyway.
1012          */
1013         if (priv->current_ht_config.is_ht) {
1014                 rcu_read_lock();
1015                 sta = ieee80211_find_sta(priv->hw, addr);
1016                 if (sta) {
1017                         memcpy(&ht_config, &sta->ht_cap, sizeof(ht_config));
1018                         cur_ht_config = &ht_config;
1019                 }
1020                 rcu_read_unlock();
1021         }
1022
1023         sta_id = iwl_add_station(priv, addr, is_ap, CMD_SYNC, cur_ht_config);
1024
1025         /* Set up default rate scaling table in device's station table */
1026         iwl_sta_init_lq(priv, addr, is_ap);
1027
1028         return sta_id;
1029 }
1030 EXPORT_SYMBOL(iwl_rxon_add_station);
1031
1032 /**
1033  * iwl_sta_init_bcast_lq - Initialize a bcast station's hardware rate table
1034  *
1035  * NOTE: Run REPLY_ADD_STA command to set up station table entry, before
1036  *       calling this function (which runs REPLY_TX_LINK_QUALITY_CMD,
1037  *       which requires station table entry to exist).
1038  */
1039 static void iwl_sta_init_bcast_lq(struct iwl_priv *priv)
1040 {
1041         int i, r;
1042         struct iwl_link_quality_cmd link_cmd = {
1043                 .reserved1 = 0,
1044         };
1045         u32 rate_flags;
1046
1047         /* Set up the rate scaling to start at selected rate, fall back
1048          * all the way down to 1M in IEEE order, and then spin on 1M */
1049         if (priv->band == IEEE80211_BAND_5GHZ)
1050                 r = IWL_RATE_6M_INDEX;
1051         else
1052                 r = IWL_RATE_1M_INDEX;
1053
1054         for (i = 0; i < LINK_QUAL_MAX_RETRY_NUM; i++) {
1055                 rate_flags = 0;
1056                 if (r >= IWL_FIRST_CCK_RATE && r <= IWL_LAST_CCK_RATE)
1057                         rate_flags |= RATE_MCS_CCK_MSK;
1058
1059                 rate_flags |= first_antenna(priv->hw_params.valid_tx_ant) <<
1060                                 RATE_MCS_ANT_POS;
1061
1062                 link_cmd.rs_table[i].rate_n_flags =
1063                         iwl_hw_set_rate_n_flags(iwl_rates[r].plcp, rate_flags);
1064                 r = iwl_get_prev_ieee_rate(r);
1065         }
1066
1067         link_cmd.general_params.single_stream_ant_msk =
1068                                 first_antenna(priv->hw_params.valid_tx_ant);
1069         link_cmd.general_params.dual_stream_ant_msk = 3;
1070         link_cmd.agg_params.agg_dis_start_th = LINK_QUAL_AGG_DISABLE_START_DEF;
1071         link_cmd.agg_params.agg_time_limit =
1072                 cpu_to_le16(LINK_QUAL_AGG_TIME_LIMIT_DEF);
1073
1074         /* Update the rate scaling for control frame Tx to AP */
1075         link_cmd.sta_id = priv->hw_params.bcast_sta_id;
1076
1077         iwl_send_cmd_pdu_async(priv, REPLY_TX_LINK_QUALITY_CMD,
1078                                sizeof(link_cmd), &link_cmd, NULL);
1079 }
1080
1081
1082 /**
1083  * iwl_add_bcast_station - add broadcast station into station table.
1084  */
1085 void iwl_add_bcast_station(struct iwl_priv *priv)
1086 {
1087         iwl_add_station(priv, iwl_bcast_addr, false, CMD_SYNC, NULL);
1088
1089         /* Set up default rate scaling table in device's station table */
1090         iwl_sta_init_bcast_lq(priv);
1091 }
1092 EXPORT_SYMBOL(iwl_add_bcast_station);
1093
1094 /**
1095  * iwl_get_sta_id - Find station's index within station table
1096  *
1097  * If new IBSS station, create new entry in station table
1098  */
1099 int iwl_get_sta_id(struct iwl_priv *priv, struct ieee80211_hdr *hdr)
1100 {
1101         int sta_id;
1102         __le16 fc = hdr->frame_control;
1103
1104         /* If this frame is broadcast or management, use broadcast station id */
1105         if (!ieee80211_is_data(fc) ||  is_multicast_ether_addr(hdr->addr1))
1106                 return priv->hw_params.bcast_sta_id;
1107
1108         switch (priv->iw_mode) {
1109
1110         /* If we are a client station in a BSS network, use the special
1111          * AP station entry (that's the only station we communicate with) */
1112         case NL80211_IFTYPE_STATION:
1113                 return IWL_AP_ID;
1114
1115         /* If we are an AP, then find the station, or use BCAST */
1116         case NL80211_IFTYPE_AP:
1117                 sta_id = iwl_find_station(priv, hdr->addr1);
1118                 if (sta_id != IWL_INVALID_STATION)
1119                         return sta_id;
1120                 return priv->hw_params.bcast_sta_id;
1121
1122         /* If this frame is going out to an IBSS network, find the station,
1123          * or create a new station table entry */
1124         case NL80211_IFTYPE_ADHOC:
1125                 sta_id = iwl_find_station(priv, hdr->addr1);
1126                 if (sta_id != IWL_INVALID_STATION)
1127                         return sta_id;
1128
1129                 /* Create new station table entry */
1130                 sta_id = iwl_add_station(priv, hdr->addr1, false,
1131                                         CMD_ASYNC, NULL);
1132
1133                 if (sta_id != IWL_INVALID_STATION)
1134                         return sta_id;
1135
1136                 IWL_DEBUG_DROP(priv, "Station %pM not in station map. "
1137                                "Defaulting to broadcast...\n",
1138                                hdr->addr1);
1139                 iwl_print_hex_dump(priv, IWL_DL_DROP, (u8 *) hdr, sizeof(*hdr));
1140                 return priv->hw_params.bcast_sta_id;
1141
1142         default:
1143                 IWL_WARN(priv, "Unknown mode of operation: %d\n",
1144                         priv->iw_mode);
1145                 return priv->hw_params.bcast_sta_id;
1146         }
1147 }
1148 EXPORT_SYMBOL(iwl_get_sta_id);
1149
1150 /**
1151  * iwl_sta_tx_modify_enable_tid - Enable Tx for this TID in station table
1152  */
1153 void iwl_sta_tx_modify_enable_tid(struct iwl_priv *priv, int sta_id, int tid)
1154 {
1155         unsigned long flags;
1156
1157         /* Remove "disable" flag, to enable Tx for this TID */
1158         spin_lock_irqsave(&priv->sta_lock, flags);
1159         priv->stations[sta_id].sta.sta.modify_mask = STA_MODIFY_TID_DISABLE_TX;
1160         priv->stations[sta_id].sta.tid_disable_tx &= cpu_to_le16(~(1 << tid));
1161         priv->stations[sta_id].sta.mode = STA_CONTROL_MODIFY_MSK;
1162         spin_unlock_irqrestore(&priv->sta_lock, flags);
1163
1164         iwl_send_add_sta(priv, &priv->stations[sta_id].sta, CMD_ASYNC);
1165 }
1166 EXPORT_SYMBOL(iwl_sta_tx_modify_enable_tid);
1167
1168 int iwl_sta_rx_agg_start(struct iwl_priv *priv,
1169                          const u8 *addr, int tid, u16 ssn)
1170 {
1171         unsigned long flags;
1172         int sta_id;
1173
1174         sta_id = iwl_find_station(priv, addr);
1175         if (sta_id == IWL_INVALID_STATION)
1176                 return -ENXIO;
1177
1178         spin_lock_irqsave(&priv->sta_lock, flags);
1179         priv->stations[sta_id].sta.station_flags_msk = 0;
1180         priv->stations[sta_id].sta.sta.modify_mask = STA_MODIFY_ADDBA_TID_MSK;
1181         priv->stations[sta_id].sta.add_immediate_ba_tid = (u8)tid;
1182         priv->stations[sta_id].sta.add_immediate_ba_ssn = cpu_to_le16(ssn);
1183         priv->stations[sta_id].sta.mode = STA_CONTROL_MODIFY_MSK;
1184         spin_unlock_irqrestore(&priv->sta_lock, flags);
1185
1186         return iwl_send_add_sta(priv, &priv->stations[sta_id].sta,
1187                                         CMD_ASYNC);
1188 }
1189 EXPORT_SYMBOL(iwl_sta_rx_agg_start);
1190
1191 int iwl_sta_rx_agg_stop(struct iwl_priv *priv, const u8 *addr, int tid)
1192 {
1193         unsigned long flags;
1194         int sta_id;
1195
1196         sta_id = iwl_find_station(priv, addr);
1197         if (sta_id == IWL_INVALID_STATION) {
1198                 IWL_ERR(priv, "Invalid station for AGG tid %d\n", tid);
1199                 return -ENXIO;
1200         }
1201
1202         spin_lock_irqsave(&priv->sta_lock, flags);
1203         priv->stations[sta_id].sta.station_flags_msk = 0;
1204         priv->stations[sta_id].sta.sta.modify_mask = STA_MODIFY_DELBA_TID_MSK;
1205         priv->stations[sta_id].sta.remove_immediate_ba_tid = (u8)tid;
1206         priv->stations[sta_id].sta.mode = STA_CONTROL_MODIFY_MSK;
1207         spin_unlock_irqrestore(&priv->sta_lock, flags);
1208
1209         return iwl_send_add_sta(priv, &priv->stations[sta_id].sta,
1210                                         CMD_ASYNC);
1211 }
1212 EXPORT_SYMBOL(iwl_sta_rx_agg_stop);
1213
1214 static void iwl_sta_modify_ps_wake(struct iwl_priv *priv, int sta_id)
1215 {
1216         unsigned long flags;
1217
1218         spin_lock_irqsave(&priv->sta_lock, flags);
1219         priv->stations[sta_id].sta.station_flags &= ~STA_FLG_PWR_SAVE_MSK;
1220         priv->stations[sta_id].sta.station_flags_msk = STA_FLG_PWR_SAVE_MSK;
1221         priv->stations[sta_id].sta.sta.modify_mask = 0;
1222         priv->stations[sta_id].sta.mode = STA_CONTROL_MODIFY_MSK;
1223         spin_unlock_irqrestore(&priv->sta_lock, flags);
1224
1225         iwl_send_add_sta(priv, &priv->stations[sta_id].sta, CMD_ASYNC);
1226 }
1227
1228 void iwl_update_ps_mode(struct iwl_priv *priv, u16 ps_bit, u8 *addr)
1229 {
1230         /* FIXME: need locking over ps_status ??? */
1231         u8 sta_id = iwl_find_station(priv, addr);
1232
1233         if (sta_id != IWL_INVALID_STATION) {
1234                 u8 sta_awake = priv->stations[sta_id].
1235                                 ps_status == STA_PS_STATUS_WAKE;
1236
1237                 if (sta_awake && ps_bit)
1238                         priv->stations[sta_id].ps_status = STA_PS_STATUS_SLEEP;
1239                 else if (!sta_awake && !ps_bit) {
1240                         iwl_sta_modify_ps_wake(priv, sta_id);
1241                         priv->stations[sta_id].ps_status = STA_PS_STATUS_WAKE;
1242                 }
1243         }
1244 }
1245