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             !(priv->stations_39[sta_id].used & IWL_STA_DRIVER_ACTIVE))
  91                 IWL_ERR(priv, "ACTIVATE a non DRIVER active station %d\n",
  92                         sta_id);
  93
  94         priv->stations[sta_id].used |= IWL_STA_UCODE_ACTIVE;
  95         IWL_DEBUG_ASSOC(priv, "Added STA to Ucode: %pM\n",
  96                         priv->stations[sta_id].sta.sta.addr);
  97
  98         spin_unlock_irqrestore(&priv->sta_lock, flags);
  99 }
 100
 101 static int iwl_add_sta_callback(struct iwl_priv *priv,
 102                                    struct iwl_cmd *cmd, struct sk_buff *skb)
 103 {
 104         struct iwl_rx_packet *res = NULL;
 105         struct iwl_addsta_cmd *addsta =
 106                 (struct iwl_addsta_cmd *)cmd->cmd.payload;
 107         u8 sta_id = addsta->sta.sta_id;
 108
 109         if (!skb) {
 110                 IWL_ERR(priv, "Error: Response NULL in REPLY_ADD_STA.\n");
 111                 return 1;
 112         }
 113
 114         res = (struct iwl_rx_packet *)skb->data;
 115         if (res->hdr.flags & IWL_CMD_FAILED_MSK) {
 116                 IWL_ERR(priv, "Bad return from REPLY_ADD_STA (0x%08X)\n",
 117                           res->hdr.flags);
 118                 return 1;
 119         }
 120
 121         switch (res->u.add_sta.status) {
 122         case ADD_STA_SUCCESS_MSK:
 123                 iwl_sta_ucode_activate(priv, sta_id);
 124                  /* fall through */
 125         default:
 126                 IWL_DEBUG_HC(priv, "Received REPLY_ADD_STA:(0x%08X)\n",
 127                              res->u.add_sta.status);
 128                 break;
 129         }
 130
 131         /* We didn't cache the SKB; let the caller free it */
 132         return 1;
 133 }
 134
 135 int iwl_send_add_sta(struct iwl_priv *priv,
 136                      struct iwl_addsta_cmd *sta, u8 flags)
 137 {
 138         struct iwl_rx_packet *res = NULL;
 139         int ret = 0;
 140         u8 data[sizeof(*sta)];
 141         struct iwl_host_cmd cmd = {
 142                 .id = REPLY_ADD_STA,
 143                 .meta.flags = flags,
 144                 .data = data,
 145         };
 146
 147         if (flags & CMD_ASYNC)
 148                 cmd.meta.u.callback = iwl_add_sta_callback;
 149         else
 150                 cmd.meta.flags |= CMD_WANT_SKB;
 151
 152         cmd.len = priv->cfg->ops->utils->build_addsta_hcmd(sta, data);
 153         ret = iwl_send_cmd(priv, &cmd);
 154
 155         if (ret || (flags & CMD_ASYNC))
 156                 return ret;
 157
 158         res = (struct iwl_rx_packet *)cmd.meta.u.skb->data;
 159         if (res->hdr.flags & IWL_CMD_FAILED_MSK) {
 160                 IWL_ERR(priv, "Bad return from REPLY_ADD_STA (0x%08X)\n",
 161                           res->hdr.flags);
 162                 ret = -EIO;
 163         }
 164
 165         if (ret == 0) {
 166                 switch (res->u.add_sta.status) {
 167                 case ADD_STA_SUCCESS_MSK:
 168                         iwl_sta_ucode_activate(priv, sta->sta.sta_id);
 169                         IWL_DEBUG_INFO(priv, "REPLY_ADD_STA PASSED\n");
 170                         break;
 171                 default:
 172                         ret = -EIO;
 173                         IWL_WARN(priv, "REPLY_ADD_STA failed\n");
 174                         break;
 175                 }
 176         }
 177
 178         priv->alloc_rxb_skb--;
 179         dev_kfree_skb_any(cmd.meta.u.skb);
 180
 181         return ret;
 182 }
 183 EXPORT_SYMBOL(iwl_send_add_sta);
 184
 185 static void iwl_set_ht_add_station(struct iwl_priv *priv, u8 index,
 186                                    struct ieee80211_sta_ht_cap *sta_ht_inf)
 187 {
 188         __le32 sta_flags;
 189         u8 mimo_ps_mode;
 190
 191         if (!sta_ht_inf || !sta_ht_inf->ht_supported)
 192                 goto done;
 193
 194         mimo_ps_mode = (sta_ht_inf->cap & IEEE80211_HT_CAP_SM_PS) >> 2;
 195
 196         sta_flags = priv->stations[index].sta.station_flags;
 197
 198         sta_flags &= ~(STA_FLG_RTS_MIMO_PROT_MSK | STA_FLG_MIMO_DIS_MSK);
 199
 200         switch (mimo_ps_mode) {
 201         case WLAN_HT_CAP_SM_PS_STATIC:
 202                 sta_flags |= STA_FLG_MIMO_DIS_MSK;
 203                 break;
 204         case WLAN_HT_CAP_SM_PS_DYNAMIC:
 205                 sta_flags |= STA_FLG_RTS_MIMO_PROT_MSK;
 206                 break;
 207         case WLAN_HT_CAP_SM_PS_DISABLED:
 208                 break;
 209         default:
 210                 IWL_WARN(priv, "Invalid MIMO PS mode %d\n", mimo_ps_mode);
 211                 break;
 212         }
 213
 214         sta_flags |= cpu_to_le32(
 215               (u32)sta_ht_inf->ampdu_factor << STA_FLG_MAX_AGG_SIZE_POS);
 216
 217         sta_flags |= cpu_to_le32(
 218               (u32)sta_ht_inf->ampdu_density << STA_FLG_AGG_MPDU_DENSITY_POS);
 219
 220         if (iwl_is_fat_tx_allowed(priv, sta_ht_inf))
 221                 sta_flags |= STA_FLG_FAT_EN_MSK;
 222         else
 223                 sta_flags &= ~STA_FLG_FAT_EN_MSK;
 224
 225         priv->stations[index].sta.station_flags = sta_flags;
 226  done:
 227         return;
 228 }
 229
 230 /**
 231  * iwl_add_station_flags - Add station to tables in driver and device
 232  */
 233 u8 iwl_add_station_flags(struct iwl_priv *priv, const u8 *addr, int is_ap,
 234                          u8 flags, struct ieee80211_sta_ht_cap *ht_info)
 235 {
 236         int i;
 237         int sta_id = IWL_INVALID_STATION;
 238         struct iwl_station_entry *station;
 239         unsigned long flags_spin;
 240
 241         spin_lock_irqsave(&priv->sta_lock, flags_spin);
 242         if (is_ap)
 243                 sta_id = IWL_AP_ID;
 244         else if (is_broadcast_ether_addr(addr))
 245                 sta_id = priv->hw_params.bcast_sta_id;
 246         else
 247                 for (i = IWL_STA_ID; i < priv->hw_params.max_stations; i++) {
 248                         if (!compare_ether_addr(priv->stations[i].sta.sta.addr,
 249                                                 addr)) {
 250                                 sta_id = i;
 251                                 break;
 252                         }
 253
 254                         if (!priv->stations[i].used &&
 255                             sta_id == IWL_INVALID_STATION)
 256                                 sta_id = i;
 257                 }
 258
 259         /* These two conditions have the same outcome, but keep them separate
 260            since they have different meanings */
 261         if (unlikely(sta_id == IWL_INVALID_STATION)) {
 262                 spin_unlock_irqrestore(&priv->sta_lock, flags_spin);
 263                 return sta_id;
 264         }
 265
 266         if (priv->stations[sta_id].used &&
 267             !compare_ether_addr(priv->stations[sta_id].sta.sta.addr, addr)) {
 268                 spin_unlock_irqrestore(&priv->sta_lock, flags_spin);
 269                 return sta_id;
 270         }
 271
 272
 273         station = &priv->stations[sta_id];
 274         station->used = IWL_STA_DRIVER_ACTIVE;
 275         IWL_DEBUG_ASSOC(priv, "Add STA to driver ID %d: %pM\n",
 276                         sta_id, addr);
 277         priv->num_stations++;
 278
 279         /* Set up the REPLY_ADD_STA command to send to device */
 280         memset(&station->sta, 0, sizeof(struct iwl_addsta_cmd));
 281         memcpy(station->sta.sta.addr, addr, ETH_ALEN);
 282         station->sta.mode = 0;
 283         station->sta.sta.sta_id = sta_id;
 284         station->sta.station_flags = 0;
 285
 286         /* BCAST station and IBSS stations do not work in HT mode */
 287         if (sta_id != priv->hw_params.bcast_sta_id &&
 288             priv->iw_mode != NL80211_IFTYPE_ADHOC)
 289                 iwl_set_ht_add_station(priv, sta_id, ht_info);
 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_flags);
 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 int iwl_remove_sta_callback(struct iwl_priv *priv,
 322                                    struct iwl_cmd *cmd, struct sk_buff *skb)
 323 {
 324         struct iwl_rx_packet *res = NULL;
 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 (!skb) {
 330                 IWL_ERR(priv, "Error: Response NULL in REPLY_REMOVE_STA.\n");
 331                 return 1;
 332         }
 333
 334         res = (struct iwl_rx_packet *)skb->data;
 335         if (res->hdr.flags & IWL_CMD_FAILED_MSK) {
 336                 IWL_ERR(priv, "Bad return from REPLY_REMOVE_STA (0x%08X)\n",
 337                 res->hdr.flags);
 338                 return 1;
 339         }
 340
 341         switch (res->u.rem_sta.status) {
 342         case REM_STA_SUCCESS_MSK:
 343                 iwl_sta_ucode_deactivate(priv, addr);
 344                 break;
 345         default:
 346                 IWL_ERR(priv, "REPLY_REMOVE_STA failed\n");
 347                 break;
 348         }
 349
 350         /* We didn't cache the SKB; let the caller free it */
 351         return 1;
 352 }
 353
 354 static int iwl_send_remove_station(struct iwl_priv *priv, const u8 *addr,
 355                                    u8 flags)
 356 {
 357         struct iwl_rx_packet *res = NULL;
 358         int ret;
 359
 360         struct iwl_rem_sta_cmd rm_sta_cmd;
 361
 362         struct iwl_host_cmd cmd = {
 363                 .id = REPLY_REMOVE_STA,
 364                 .len = sizeof(struct iwl_rem_sta_cmd),
 365                 .meta.flags = flags,
 366                 .data = &rm_sta_cmd,
 367         };
 368
 369         memset(&rm_sta_cmd, 0, sizeof(rm_sta_cmd));
 370         rm_sta_cmd.num_sta = 1;
 371         memcpy(&rm_sta_cmd.addr, addr , ETH_ALEN);
 372
 373         if (flags & CMD_ASYNC)
 374                 cmd.meta.u.callback = iwl_remove_sta_callback;
 375         else
 376                 cmd.meta.flags |= CMD_WANT_SKB;
 377         ret = iwl_send_cmd(priv, &cmd);
 378
 379         if (ret || (flags & CMD_ASYNC))
 380                 return ret;
 381
 382         res = (struct iwl_rx_packet *)cmd.meta.u.skb->data;
 383         if (res->hdr.flags & IWL_CMD_FAILED_MSK) {
 384                 IWL_ERR(priv, "Bad return from REPLY_REMOVE_STA (0x%08X)\n",
 385                           res->hdr.flags);
 386                 ret = -EIO;
 387         }
 388
 389         if (!ret) {
 390                 switch (res->u.rem_sta.status) {
 391                 case REM_STA_SUCCESS_MSK:
 392                         iwl_sta_ucode_deactivate(priv, addr);
 393                         IWL_DEBUG_ASSOC(priv, "REPLY_REMOVE_STA PASSED\n");
 394                         break;
 395                 default:
 396                         ret = -EIO;
 397                         IWL_ERR(priv, "REPLY_REMOVE_STA failed\n");
 398                         break;
 399                 }
 400         }
 401
 402         priv->alloc_rxb_skb--;
 403         dev_kfree_skb_any(cmd.meta.u.skb);
 404
 405         return ret;
 406 }
 407
 408 /**
 409  * iwl_remove_station - Remove driver's knowledge of station.
 410  */
 411 int iwl_remove_station(struct iwl_priv *priv, const u8 *addr, int is_ap)
 412 {
 413         int sta_id = IWL_INVALID_STATION;
 414         int i, ret = -EINVAL;
 415         unsigned long flags;
 416
 417         spin_lock_irqsave(&priv->sta_lock, flags);
 418
 419         if (is_ap)
 420                 sta_id = IWL_AP_ID;
 421         else if (is_broadcast_ether_addr(addr))
 422                 sta_id = priv->hw_params.bcast_sta_id;
 423         else
 424                 for (i = IWL_STA_ID; i < priv->hw_params.max_stations; i++)
 425                         if (priv->stations[i].used &&
 426                             !compare_ether_addr(priv->stations[i].sta.sta.addr,
 427                                                 addr)) {
 428                                 sta_id = i;
 429                                 break;
 430                         }
 431
 432         if (unlikely(sta_id == IWL_INVALID_STATION))
 433                 goto out;
 434
 435         IWL_DEBUG_ASSOC(priv, "Removing STA from driver:%d  %pM\n",
 436                 sta_id, addr);
 437
 438         if (!(priv->stations[sta_id].used & IWL_STA_DRIVER_ACTIVE)) {
 439                 IWL_ERR(priv, "Removing %pM but non DRIVER active\n",
 440                                 addr);
 441                 goto out;
 442         }
 443
 444         if (!(priv->stations[sta_id].used & IWL_STA_UCODE_ACTIVE)) {
 445                 IWL_ERR(priv, "Removing %pM but non UCODE active\n",
 446                                 addr);
 447                 goto out;
 448         }
 449
 450
 451         priv->stations[sta_id].used &= ~IWL_STA_DRIVER_ACTIVE;
 452
 453         priv->num_stations--;
 454
 455         BUG_ON(priv->num_stations < 0);
 456
 457         spin_unlock_irqrestore(&priv->sta_lock, flags);
 458
 459         ret = iwl_send_remove_station(priv, addr, CMD_ASYNC);
 460         return ret;
 461 out:
 462         spin_unlock_irqrestore(&priv->sta_lock, flags);
 463         return ret;
 464 }
 465 EXPORT_SYMBOL(iwl_remove_station);
 466
 467 /**
 468  * iwl_clear_stations_table - Clear the driver's station table
 469  *
 470  * NOTE:  This does not clear or otherwise alter the device's station table.
 471  */
 472 void iwl_clear_stations_table(struct iwl_priv *priv)
 473 {
 474         unsigned long flags;
 475
 476         spin_lock_irqsave(&priv->sta_lock, flags);
 477
 478         if (iwl_is_alive(priv) &&
 479            !test_bit(STATUS_EXIT_PENDING, &priv->status) &&
 480            iwl_send_cmd_pdu_async(priv, REPLY_REMOVE_ALL_STA, 0, NULL, NULL))
 481                 IWL_ERR(priv, "Couldn't clear the station table\n");
 482
 483         priv->num_stations = 0;
 484         memset(priv->stations, 0, sizeof(priv->stations));
 485
 486         /* clean ucode key table bit map */
 487         priv->ucode_key_table = 0;
 488
 489         spin_unlock_irqrestore(&priv->sta_lock, flags);
 490 }
 491 EXPORT_SYMBOL(iwl_clear_stations_table);
 492
 493 static int iwl_get_free_ucode_key_index(struct iwl_priv *priv)
 494 {
 495         int i;
 496
 497         for (i = 0; i < STA_KEY_MAX_NUM; i++)
 498                 if (!test_and_set_bit(i, &priv->ucode_key_table))
 499                         return i;
 500
 501         return WEP_INVALID_OFFSET;
 502 }
 503
 504 int iwl_send_static_wepkey_cmd(struct iwl_priv *priv, u8 send_if_empty)
 505 {
 506         int i, not_empty = 0;
 507         u8 buff[sizeof(struct iwl_wep_cmd) +
 508                 sizeof(struct iwl_wep_key) * WEP_KEYS_MAX];
 509         struct iwl_wep_cmd *wep_cmd = (struct iwl_wep_cmd *)buff;
 510         size_t cmd_size  = sizeof(struct iwl_wep_cmd);
 511         struct iwl_host_cmd cmd = {
 512                 .id = REPLY_WEPKEY,
 513                 .data = wep_cmd,
 514                 .meta.flags = CMD_ASYNC,
 515         };
 516
 517         memset(wep_cmd, 0, cmd_size +
 518                         (sizeof(struct iwl_wep_key) * WEP_KEYS_MAX));
 519
 520         for (i = 0; i < WEP_KEYS_MAX ; i++) {
 521                 wep_cmd->key[i].key_index = i;
 522                 if (priv->wep_keys[i].key_size) {
 523                         wep_cmd->key[i].key_offset = i;
 524                         not_empty = 1;
 525                 } else {
 526                         wep_cmd->key[i].key_offset = WEP_INVALID_OFFSET;
 527                 }
 528
 529                 wep_cmd->key[i].key_size = priv->wep_keys[i].key_size;
 530                 memcpy(&wep_cmd->key[i].key[3], priv->wep_keys[i].key,
 531                                 priv->wep_keys[i].key_size);
 532         }
 533
 534         wep_cmd->global_key_type = WEP_KEY_WEP_TYPE;
 535         wep_cmd->num_keys = WEP_KEYS_MAX;
 536
 537         cmd_size += sizeof(struct iwl_wep_key) * WEP_KEYS_MAX;
 538
 539         cmd.len = cmd_size;
 540
 541         if (not_empty || send_if_empty)
 542                 return iwl_send_cmd(priv, &cmd);
 543         else
 544                 return 0;
 545 }
 546 EXPORT_SYMBOL(iwl_send_static_wepkey_cmd);
 547
 548 int iwl_remove_default_wep_key(struct iwl_priv *priv,
 549                                struct ieee80211_key_conf *keyconf)
 550 {
 551         int ret;
 552         unsigned long flags;
 553
 554         spin_lock_irqsave(&priv->sta_lock, flags);
 555
 556         if (!test_and_clear_bit(keyconf->keyidx, &priv->ucode_key_table))
 557                 IWL_ERR(priv, "index %d not used in uCode key table.\n",
 558                           keyconf->keyidx);
 559
 560         priv->default_wep_key--;
 561         memset(&priv->wep_keys[keyconf->keyidx], 0, sizeof(priv->wep_keys[0]));
 562         ret = iwl_send_static_wepkey_cmd(priv, 1);
 563         IWL_DEBUG_WEP(priv, "Remove default WEP key: idx=%d ret=%d\n",
 564                       keyconf->keyidx, ret);
 565         spin_unlock_irqrestore(&priv->sta_lock, flags);
 566
 567         return ret;
 568 }
 569 EXPORT_SYMBOL(iwl_remove_default_wep_key);
 570
 571 int iwl_set_default_wep_key(struct iwl_priv *priv,
 572                             struct ieee80211_key_conf *keyconf)
 573 {
 574         int ret;
 575         unsigned long flags;
 576
 577         if (keyconf->keylen != WEP_KEY_LEN_128 &&
 578             keyconf->keylen != WEP_KEY_LEN_64) {
 579                 IWL_DEBUG_WEP(priv, "Bad WEP key length %d\n", keyconf->keylen);
 580                 return -EINVAL;
 581         }
 582
 583         keyconf->flags &= ~IEEE80211_KEY_FLAG_GENERATE_IV;
 584         keyconf->hw_key_idx = HW_KEY_DEFAULT;
 585         priv->stations[IWL_AP_ID].keyinfo.alg = ALG_WEP;
 586
 587         spin_lock_irqsave(&priv->sta_lock, flags);
 588         priv->default_wep_key++;
 589
 590         if (test_and_set_bit(keyconf->keyidx, &priv->ucode_key_table))
 591                 IWL_ERR(priv, "index %d already used in uCode key table.\n",
 592                         keyconf->keyidx);
 593
 594         priv->wep_keys[keyconf->keyidx].key_size = keyconf->keylen;
 595         memcpy(&priv->wep_keys[keyconf->keyidx].key, &keyconf->key,
 596                                                         keyconf->keylen);
 597
 598         ret = iwl_send_static_wepkey_cmd(priv, 0);
 599         IWL_DEBUG_WEP(priv, "Set default WEP key: len=%d idx=%d ret=%d\n",
 600                 keyconf->keylen, keyconf->keyidx, ret);
 601         spin_unlock_irqrestore(&priv->sta_lock, flags);
 602
 603         return ret;
 604 }
 605 EXPORT_SYMBOL(iwl_set_default_wep_key);
 606
 607 static int iwl_set_wep_dynamic_key_info(struct iwl_priv *priv,
 608                                 struct ieee80211_key_conf *keyconf,
 609                                 u8 sta_id)
 610 {
 611         unsigned long flags;
 612         __le16 key_flags = 0;
 613         int ret;
 614
 615         keyconf->flags &= ~IEEE80211_KEY_FLAG_GENERATE_IV;
 616
 617         key_flags |= (STA_KEY_FLG_WEP | STA_KEY_FLG_MAP_KEY_MSK);
 618         key_flags |= cpu_to_le16(keyconf->keyidx << STA_KEY_FLG_KEYID_POS);
 619         key_flags &= ~STA_KEY_FLG_INVALID;
 620
 621         if (keyconf->keylen == WEP_KEY_LEN_128)
 622                 key_flags |= STA_KEY_FLG_KEY_SIZE_MSK;
 623
 624         if (sta_id == priv->hw_params.bcast_sta_id)
 625                 key_flags |= STA_KEY_MULTICAST_MSK;
 626
 627         spin_lock_irqsave(&priv->sta_lock, flags);
 628
 629         priv->stations[sta_id].keyinfo.alg = keyconf->alg;
 630         priv->stations[sta_id].keyinfo.keylen = keyconf->keylen;
 631         priv->stations[sta_id].keyinfo.keyidx = keyconf->keyidx;
 632
 633         memcpy(priv->stations[sta_id].keyinfo.key,
 634                                 keyconf->key, keyconf->keylen);
 635
 636         memcpy(&priv->stations[sta_id].sta.key.key[3],
 637                                 keyconf->key, keyconf->keylen);
 638
 639         if ((priv->stations[sta_id].sta.key.key_flags & STA_KEY_FLG_ENCRYPT_MSK)
 640                         == STA_KEY_FLG_NO_ENC)
 641                 priv->stations[sta_id].sta.key.key_offset =
 642                                  iwl_get_free_ucode_key_index(priv);
 643         /* else, we are overriding an existing key => no need to allocated room
 644          * in uCode. */
 645
 646         WARN(priv->stations[sta_id].sta.key.key_offset == WEP_INVALID_OFFSET,
 647                 "no space for a new key");
 648
 649         priv->stations[sta_id].sta.key.key_flags = key_flags;
 650         priv->stations[sta_id].sta.sta.modify_mask = STA_MODIFY_KEY_MASK;
 651         priv->stations[sta_id].sta.mode = STA_CONTROL_MODIFY_MSK;
 652
 653         ret = iwl_send_add_sta(priv, &priv->stations[sta_id].sta, CMD_ASYNC);
 654
 655         spin_unlock_irqrestore(&priv->sta_lock, flags);
 656
 657         return ret;
 658 }
 659
 660 static int iwl_set_ccmp_dynamic_key_info(struct iwl_priv *priv,
 661                                    struct ieee80211_key_conf *keyconf,
 662                                    u8 sta_id)
 663 {
 664         unsigned long flags;
 665         __le16 key_flags = 0;
 666         int ret;
 667
 668         key_flags |= (STA_KEY_FLG_CCMP | STA_KEY_FLG_MAP_KEY_MSK);
 669         key_flags |= cpu_to_le16(keyconf->keyidx << STA_KEY_FLG_KEYID_POS);
 670         key_flags &= ~STA_KEY_FLG_INVALID;
 671
 672         if (sta_id == priv->hw_params.bcast_sta_id)
 673                 key_flags |= STA_KEY_MULTICAST_MSK;
 674
 675         keyconf->flags |= IEEE80211_KEY_FLAG_GENERATE_IV;
 676
 677         spin_lock_irqsave(&priv->sta_lock, flags);
 678         priv->stations[sta_id].keyinfo.alg = keyconf->alg;
 679         priv->stations[sta_id].keyinfo.keylen = keyconf->keylen;
 680
 681         memcpy(priv->stations[sta_id].keyinfo.key, keyconf->key,
 682                keyconf->keylen);
 683
 684         memcpy(priv->stations[sta_id].sta.key.key, keyconf->key,
 685                keyconf->keylen);
 686
 687         if ((priv->stations[sta_id].sta.key.key_flags & STA_KEY_FLG_ENCRYPT_MSK)
 688                         == STA_KEY_FLG_NO_ENC)
 689                 priv->stations[sta_id].sta.key.key_offset =
 690                                  iwl_get_free_ucode_key_index(priv);
 691         /* else, we are overriding an existing key => no need to allocated room
 692          * in uCode. */
 693
 694         WARN(priv->stations[sta_id].sta.key.key_offset == WEP_INVALID_OFFSET,
 695                 "no space for a new key");
 696
 697         priv->stations[sta_id].sta.key.key_flags = key_flags;
 698         priv->stations[sta_id].sta.sta.modify_mask = STA_MODIFY_KEY_MASK;
 699         priv->stations[sta_id].sta.mode = STA_CONTROL_MODIFY_MSK;
 700
 701         ret = iwl_send_add_sta(priv, &priv->stations[sta_id].sta, CMD_ASYNC);
 702
 703         spin_unlock_irqrestore(&priv->sta_lock, flags);
 704
 705         return ret;
 706 }
 707
 708 static int iwl_set_tkip_dynamic_key_info(struct iwl_priv *priv,
 709                                    struct ieee80211_key_conf *keyconf,
 710                                    u8 sta_id)
 711 {
 712         unsigned long flags;
 713         int ret = 0;
 714
 715         keyconf->flags |= IEEE80211_KEY_FLAG_GENERATE_IV;
 716         keyconf->flags |= IEEE80211_KEY_FLAG_GENERATE_MMIC;
 717
 718         spin_lock_irqsave(&priv->sta_lock, flags);
 719
 720         priv->stations[sta_id].keyinfo.alg = keyconf->alg;
 721         priv->stations[sta_id].keyinfo.keylen = 16;
 722
 723         if ((priv->stations[sta_id].sta.key.key_flags & STA_KEY_FLG_ENCRYPT_MSK)
 724                         == STA_KEY_FLG_NO_ENC)
 725                 priv->stations[sta_id].sta.key.key_offset =
 726                                  iwl_get_free_ucode_key_index(priv);
 727         /* else, we are overriding an existing key => no need to allocated room
 728          * in uCode. */
 729
 730         WARN(priv->stations[sta_id].sta.key.key_offset == WEP_INVALID_OFFSET,
 731                 "no space for a new key");
 732
 733         /* This copy is acutally not needed: we get the key with each TX */
 734         memcpy(priv->stations[sta_id].keyinfo.key, keyconf->key, 16);
 735
 736         memcpy(priv->stations[sta_id].sta.key.key, keyconf->key, 16);
 737
 738         spin_unlock_irqrestore(&priv->sta_lock, flags);
 739
 740         return ret;
 741 }
 742
 743 void iwl_update_tkip_key(struct iwl_priv *priv,
 744                         struct ieee80211_key_conf *keyconf,
 745                         const u8 *addr, u32 iv32, u16 *phase1key)
 746 {
 747         u8 sta_id = IWL_INVALID_STATION;
 748         unsigned long flags;
 749         __le16 key_flags = 0;
 750         int i;
 751         DECLARE_MAC_BUF(mac);
 752
 753         sta_id = iwl_find_station(priv, addr);
 754         if (sta_id == IWL_INVALID_STATION) {
 755                 IWL_DEBUG_MAC80211(priv, "leave - %pM not in station map.\n",
 756                                    addr);
 757                 return;
 758         }
 759
 760         if (iwl_scan_cancel(priv)) {
 761                 /* cancel scan failed, just live w/ bad key and rely
 762                    briefly on SW decryption */
 763                 return;
 764         }
 765
 766         key_flags |= (STA_KEY_FLG_TKIP | STA_KEY_FLG_MAP_KEY_MSK);
 767         key_flags |= cpu_to_le16(keyconf->keyidx << STA_KEY_FLG_KEYID_POS);
 768         key_flags &= ~STA_KEY_FLG_INVALID;
 769
 770         if (sta_id == priv->hw_params.bcast_sta_id)
 771                 key_flags |= STA_KEY_MULTICAST_MSK;
 772
 773         spin_lock_irqsave(&priv->sta_lock, flags);
 774
 775         priv->stations[sta_id].sta.key.key_flags = key_flags;
 776         priv->stations[sta_id].sta.key.tkip_rx_tsc_byte2 = (u8) iv32;
 777
 778         for (i = 0; i < 5; i++)
 779                 priv->stations[sta_id].sta.key.tkip_rx_ttak[i] =
 780                         cpu_to_le16(phase1key[i]);
 781
 782         priv->stations[sta_id].sta.sta.modify_mask = STA_MODIFY_KEY_MASK;
 783         priv->stations[sta_id].sta.mode = STA_CONTROL_MODIFY_MSK;
 784
 785         iwl_send_add_sta(priv, &priv->stations[sta_id].sta, CMD_ASYNC);
 786
 787         spin_unlock_irqrestore(&priv->sta_lock, flags);
 788
 789 }
 790 EXPORT_SYMBOL(iwl_update_tkip_key);
 791
 792 int iwl_remove_dynamic_key(struct iwl_priv *priv,
 793                                 struct ieee80211_key_conf *keyconf,
 794                                 u8 sta_id)
 795 {
 796         unsigned long flags;
 797         int ret = 0;
 798         u16 key_flags;
 799         u8 keyidx;
 800
 801         priv->key_mapping_key--;
 802
 803         spin_lock_irqsave(&priv->sta_lock, flags);
 804         key_flags = le16_to_cpu(priv->stations[sta_id].sta.key.key_flags);
 805         keyidx = (key_flags >> STA_KEY_FLG_KEYID_POS) & 0x3;
 806
 807         IWL_DEBUG_WEP(priv, "Remove dynamic key: idx=%d sta=%d\n",
 808                       keyconf->keyidx, sta_id);
 809
 810         if (keyconf->keyidx != keyidx) {
 811                 /* We need to remove a key with index different that the one
 812                  * in the uCode. This means that the key we need to remove has
 813                  * been replaced by another one with different index.
 814                  * Don't do anything and return ok
 815                  */
 816                 spin_unlock_irqrestore(&priv->sta_lock, flags);
 817                 return 0;
 818         }
 819
 820         if (priv->stations[sta_id].sta.key.key_offset == WEP_INVALID_OFFSET) {
 821                 IWL_WARN(priv, "Removing wrong key %d 0x%x\n",
 822                             keyconf->keyidx, key_flags);
 823                 spin_unlock_irqrestore(&priv->sta_lock, flags);
 824                 return 0;
 825         }
 826
 827         if (!test_and_clear_bit(priv->stations[sta_id].sta.key.key_offset,
 828                 &priv->ucode_key_table))
 829                 IWL_ERR(priv, "index %d not used in uCode key table.\n",
 830                         priv->stations[sta_id].sta.key.key_offset);
 831         memset(&priv->stations[sta_id].keyinfo, 0,
 832                                         sizeof(struct iwl_hw_key));
 833         memset(&priv->stations[sta_id].sta.key, 0,
 834                                         sizeof(struct iwl4965_keyinfo));
 835         priv->stations[sta_id].sta.key.key_flags =
 836                         STA_KEY_FLG_NO_ENC | STA_KEY_FLG_INVALID;
 837         priv->stations[sta_id].sta.key.key_offset = WEP_INVALID_OFFSET;
 838         priv->stations[sta_id].sta.sta.modify_mask = STA_MODIFY_KEY_MASK;
 839         priv->stations[sta_id].sta.mode = STA_CONTROL_MODIFY_MSK;
 840
 841         ret =  iwl_send_add_sta(priv, &priv->stations[sta_id].sta, CMD_ASYNC);
 842         spin_unlock_irqrestore(&priv->sta_lock, flags);
 843         return ret;
 844 }
 845 EXPORT_SYMBOL(iwl_remove_dynamic_key);
 846
 847 int iwl_set_dynamic_key(struct iwl_priv *priv,
 848                                 struct ieee80211_key_conf *keyconf, u8 sta_id)
 849 {
 850         int ret;
 851
 852         priv->key_mapping_key++;
 853         keyconf->hw_key_idx = HW_KEY_DYNAMIC;
 854
 855         switch (keyconf->alg) {
 856         case ALG_CCMP:
 857                 ret = iwl_set_ccmp_dynamic_key_info(priv, keyconf, sta_id);
 858                 break;
 859         case ALG_TKIP:
 860                 ret = iwl_set_tkip_dynamic_key_info(priv, keyconf, sta_id);
 861                 break;
 862         case ALG_WEP:
 863                 ret = iwl_set_wep_dynamic_key_info(priv, keyconf, sta_id);
 864                 break;
 865         default:
 866                 IWL_ERR(priv,
 867                         "Unknown alg: %s alg = %d\n", __func__, keyconf->alg);
 868                 ret = -EINVAL;
 869         }
 870
 871         IWL_DEBUG_WEP(priv, "Set dynamic key: alg= %d len=%d idx=%d sta=%d ret=%d\n",
 872                       keyconf->alg, keyconf->keylen, keyconf->keyidx,
 873                       sta_id, ret);
 874
 875         return ret;
 876 }
 877 EXPORT_SYMBOL(iwl_set_dynamic_key);
 878
 879 #ifdef CONFIG_IWLWIFI_DEBUG
 880 static void iwl_dump_lq_cmd(struct iwl_priv *priv,
 881                            struct iwl_link_quality_cmd *lq)
 882 {
 883         int i;
 884         IWL_DEBUG_RATE(priv, "lq station id 0x%x\n", lq->sta_id);
 885         IWL_DEBUG_RATE(priv, "lq ant 0x%X 0x%X\n",
 886                        lq->general_params.single_stream_ant_msk,
 887                        lq->general_params.dual_stream_ant_msk);
 888
 889         for (i = 0; i < LINK_QUAL_MAX_RETRY_NUM; i++)
 890                 IWL_DEBUG_RATE(priv, "lq index %d 0x%X\n",
 891                                i, lq->rs_table[i].rate_n_flags);
 892 }
 893 #else
 894 static inline void iwl_dump_lq_cmd(struct iwl_priv *priv,
 895                                    struct iwl_link_quality_cmd *lq)
 896 {
 897 }
 898 #endif
 899
 900 int iwl_send_lq_cmd(struct iwl_priv *priv,
 901                     struct iwl_link_quality_cmd *lq, u8 flags)
 902 {
 903         struct iwl_host_cmd cmd = {
 904                 .id = REPLY_TX_LINK_QUALITY_CMD,
 905                 .len = sizeof(struct iwl_link_quality_cmd),
 906                 .meta.flags = flags,
 907                 .data = lq,
 908         };
 909
 910         if ((lq->sta_id == 0xFF) &&
 911             (priv->iw_mode == NL80211_IFTYPE_ADHOC))
 912                 return -EINVAL;
 913
 914         if (lq->sta_id == 0xFF)
 915                 lq->sta_id = IWL_AP_ID;
 916
 917         iwl_dump_lq_cmd(priv, lq);
 918
 919         if (iwl_is_associated(priv) && priv->assoc_station_added)
 920                 return  iwl_send_cmd(priv, &cmd);
 921
 922         return 0;
 923 }
 924 EXPORT_SYMBOL(iwl_send_lq_cmd);
 925
 926 /**
 927  * iwl_sta_init_lq - Initialize a station's hardware rate table
 928  *
 929  * The uCode's station table contains a table of fallback rates
 930  * for automatic fallback during transmission.
 931  *
 932  * NOTE: This sets up a default set of values.  These will be replaced later
 933  *       if the driver's iwl-agn-rs rate scaling algorithm is used, instead of
 934  *       rc80211_simple.
 935  *
 936  * NOTE: Run REPLY_ADD_STA command to set up station table entry, before
 937  *       calling this function (which runs REPLY_TX_LINK_QUALITY_CMD,
 938  *       which requires station table entry to exist).
 939  */
 940 static void iwl_sta_init_lq(struct iwl_priv *priv, const u8 *addr, int is_ap)
 941 {
 942         int i, r;
 943         struct iwl_link_quality_cmd link_cmd = {
 944                 .reserved1 = 0,
 945         };
 946         u32 rate_flags;
 947
 948         /* Set up the rate scaling to start at selected rate, fall back
 949          * all the way down to 1M in IEEE order, and then spin on 1M */
 950         if (is_ap)
 951                 r = IWL_RATE_54M_INDEX;
 952         else if (priv->band == IEEE80211_BAND_5GHZ)
 953                 r = IWL_RATE_6M_INDEX;
 954         else
 955                 r = IWL_RATE_1M_INDEX;
 956
 957         for (i = 0; i < LINK_QUAL_MAX_RETRY_NUM; i++) {
 958                 rate_flags = 0;
 959                 if (r >= IWL_FIRST_CCK_RATE && r <= IWL_LAST_CCK_RATE)
 960                         rate_flags |= RATE_MCS_CCK_MSK;
 961
 962                 rate_flags |= first_antenna(priv->hw_params.valid_tx_ant) <<
 963                                 RATE_MCS_ANT_POS;
 964
 965                 link_cmd.rs_table[i].rate_n_flags =
 966                         iwl_hw_set_rate_n_flags(iwl_rates[r].plcp, rate_flags);
 967                 r = iwl_get_prev_ieee_rate(r);
 968         }
 969
 970         link_cmd.general_params.single_stream_ant_msk =
 971                                 first_antenna(priv->hw_params.valid_tx_ant);
 972         link_cmd.general_params.dual_stream_ant_msk = 3;
 973         link_cmd.agg_params.agg_dis_start_th = 3;
 974         link_cmd.agg_params.agg_time_limit = cpu_to_le16(4000);
 975
 976         /* Update the rate scaling for control frame Tx to AP */
 977         link_cmd.sta_id = is_ap ? IWL_AP_ID : priv->hw_params.bcast_sta_id;
 978
 979         iwl_send_cmd_pdu_async(priv, REPLY_TX_LINK_QUALITY_CMD,
 980                                sizeof(link_cmd), &link_cmd, NULL);
 981 }
 982
 983 /**
 984  * iwl_rxon_add_station - add station into station table.
 985  *
 986  * there is only one AP station with id= IWL_AP_ID
 987  * NOTE: mutex must be held before calling this function
 988  */
 989 int iwl_rxon_add_station(struct iwl_priv *priv, const u8 *addr, int is_ap)
 990 {
 991         struct ieee80211_sta *sta;
 992         struct ieee80211_sta_ht_cap ht_config;
 993         struct ieee80211_sta_ht_cap *cur_ht_config = NULL;
 994         u8 sta_id;
 995
 996         /* Add station to device's station table */
 997
 998         /*
 999          * XXX: This check is definitely not correct, if we're an AP
1000          *      it'll always be false which is not what we want, but
1001          *      it doesn't look like iwlagn is prepared to be an HT
1002          *      AP anyway.
1003          */
1004         if (priv->current_ht_config.is_ht) {
1005                 rcu_read_lock();
1006                 sta = ieee80211_find_sta(priv->hw, addr);
1007                 if (sta) {
1008                         memcpy(&ht_config, &sta->ht_cap, sizeof(ht_config));
1009                         cur_ht_config = &ht_config;
1010                 }
1011                 rcu_read_unlock();
1012         }
1013
1014         sta_id = iwl_add_station_flags(priv, addr, is_ap,
1015                                        0, cur_ht_config);
1016
1017         /* Set up default rate scaling table in device's station table */
1018         iwl_sta_init_lq(priv, addr, is_ap);
1019
1020         return sta_id;
1021 }
1022 EXPORT_SYMBOL(iwl_rxon_add_station);
1023
1024 /**
1025  * iwl_get_sta_id - Find station's index within station table
1026  *
1027  * If new IBSS station, create new entry in station table
1028  */
1029 int iwl_get_sta_id(struct iwl_priv *priv, struct ieee80211_hdr *hdr)
1030 {
1031         int sta_id;
1032         u16 fc = le16_to_cpu(hdr->frame_control);
1033
1034         /* If this frame is broadcast or management, use broadcast station id */
1035         if (((fc & IEEE80211_FCTL_FTYPE) != IEEE80211_FTYPE_DATA) ||
1036             is_multicast_ether_addr(hdr->addr1))
1037                 return priv->hw_params.bcast_sta_id;
1038
1039         switch (priv->iw_mode) {
1040
1041         /* If we are a client station in a BSS network, use the special
1042          * AP station entry (that's the only station we communicate with) */
1043         case NL80211_IFTYPE_STATION:
1044                 return IWL_AP_ID;
1045
1046         /* If we are an AP, then find the station, or use BCAST */
1047         case NL80211_IFTYPE_AP:
1048                 sta_id = iwl_find_station(priv, hdr->addr1);
1049                 if (sta_id != IWL_INVALID_STATION)
1050                         return sta_id;
1051                 return priv->hw_params.bcast_sta_id;
1052
1053         /* If this frame is going out to an IBSS network, find the station,
1054          * or create a new station table entry */
1055         case NL80211_IFTYPE_ADHOC:
1056                 sta_id = iwl_find_station(priv, hdr->addr1);
1057                 if (sta_id != IWL_INVALID_STATION)
1058                         return sta_id;
1059
1060                 /* Create new station table entry */
1061                 sta_id = iwl_add_station_flags(priv, hdr->addr1,
1062                                                    0, CMD_ASYNC, NULL);
1063
1064                 if (sta_id != IWL_INVALID_STATION)
1065                         return sta_id;
1066
1067                 IWL_DEBUG_DROP(priv, "Station %pM not in station map. "
1068                                "Defaulting to broadcast...\n",
1069                                hdr->addr1);
1070                 iwl_print_hex_dump(priv, IWL_DL_DROP, (u8 *) hdr, sizeof(*hdr));
1071                 return priv->hw_params.bcast_sta_id;
1072
1073         /* If we are in monitor mode, use BCAST. This is required for
1074          * packet injection. */
1075         case NL80211_IFTYPE_MONITOR:
1076                 return priv->hw_params.bcast_sta_id;
1077
1078         default:
1079                 IWL_WARN(priv, "Unknown mode of operation: %d\n",
1080                         priv->iw_mode);
1081                 return priv->hw_params.bcast_sta_id;
1082         }
1083 }
1084 EXPORT_SYMBOL(iwl_get_sta_id);
1085
1086 /**
1087  * iwl_sta_tx_modify_enable_tid - Enable Tx for this TID in station table
1088  */
1089 void iwl_sta_tx_modify_enable_tid(struct iwl_priv *priv, int sta_id, int tid)
1090 {
1091         unsigned long flags;
1092
1093         /* Remove "disable" flag, to enable Tx for this TID */
1094         spin_lock_irqsave(&priv->sta_lock, flags);
1095         priv->stations[sta_id].sta.sta.modify_mask = STA_MODIFY_TID_DISABLE_TX;
1096         priv->stations[sta_id].sta.tid_disable_tx &= cpu_to_le16(~(1 << tid));
1097         priv->stations[sta_id].sta.mode = STA_CONTROL_MODIFY_MSK;
1098         spin_unlock_irqrestore(&priv->sta_lock, flags);
1099
1100         iwl_send_add_sta(priv, &priv->stations[sta_id].sta, CMD_ASYNC);
1101 }
1102 EXPORT_SYMBOL(iwl_sta_tx_modify_enable_tid);
1103
1104 int iwl_sta_rx_agg_start(struct iwl_priv *priv,
1105                          const u8 *addr, int tid, u16 ssn)
1106 {
1107         unsigned long flags;
1108         int sta_id;
1109
1110         sta_id = iwl_find_station(priv, addr);
1111         if (sta_id == IWL_INVALID_STATION)
1112                 return -ENXIO;
1113
1114         spin_lock_irqsave(&priv->sta_lock, flags);
1115         priv->stations[sta_id].sta.station_flags_msk = 0;
1116         priv->stations[sta_id].sta.sta.modify_mask = STA_MODIFY_ADDBA_TID_MSK;
1117         priv->stations[sta_id].sta.add_immediate_ba_tid = (u8)tid;
1118         priv->stations[sta_id].sta.add_immediate_ba_ssn = cpu_to_le16(ssn);
1119         priv->stations[sta_id].sta.mode = STA_CONTROL_MODIFY_MSK;
1120         spin_unlock_irqrestore(&priv->sta_lock, flags);
1121
1122         return iwl_send_add_sta(priv, &priv->stations[sta_id].sta,
1123                                         CMD_ASYNC);
1124 }
1125 EXPORT_SYMBOL(iwl_sta_rx_agg_start);
1126
1127 int iwl_sta_rx_agg_stop(struct iwl_priv *priv, const u8 *addr, int tid)
1128 {
1129         unsigned long flags;
1130         int sta_id;
1131
1132         sta_id = iwl_find_station(priv, addr);
1133         if (sta_id == IWL_INVALID_STATION)
1134                 return -ENXIO;
1135
1136         spin_lock_irqsave(&priv->sta_lock, flags);
1137         priv->stations[sta_id].sta.station_flags_msk = 0;
1138         priv->stations[sta_id].sta.sta.modify_mask = STA_MODIFY_DELBA_TID_MSK;
1139         priv->stations[sta_id].sta.remove_immediate_ba_tid = (u8)tid;
1140         priv->stations[sta_id].sta.mode = STA_CONTROL_MODIFY_MSK;
1141         spin_unlock_irqrestore(&priv->sta_lock, flags);
1142
1143         return iwl_send_add_sta(priv, &priv->stations[sta_id].sta,
1144                                         CMD_ASYNC);
1145 }
1146 EXPORT_SYMBOL(iwl_sta_rx_agg_stop);
1147
1148 static void iwl_sta_modify_ps_wake(struct iwl_priv *priv, int sta_id)
1149 {
1150         unsigned long flags;
1151
1152         spin_lock_irqsave(&priv->sta_lock, flags);
1153         priv->stations[sta_id].sta.station_flags &= ~STA_FLG_PWR_SAVE_MSK;
1154         priv->stations[sta_id].sta.station_flags_msk = STA_FLG_PWR_SAVE_MSK;
1155         priv->stations[sta_id].sta.sta.modify_mask = 0;
1156         priv->stations[sta_id].sta.mode = STA_CONTROL_MODIFY_MSK;
1157         spin_unlock_irqrestore(&priv->sta_lock, flags);
1158
1159         iwl_send_add_sta(priv, &priv->stations[sta_id].sta, CMD_ASYNC);
1160 }
1161
1162 void iwl_update_ps_mode(struct iwl_priv *priv, u16 ps_bit, u8 *addr)
1163 {
1164         /* FIXME: need locking over ps_status ??? */
1165         u8 sta_id = iwl_find_station(priv, addr);
1166
1167         if (sta_id != IWL_INVALID_STATION) {
1168                 u8 sta_awake = priv->stations[sta_id].
1169                                 ps_status == STA_PS_STATUS_WAKE;
1170
1171                 if (sta_awake && ps_bit)
1172                         priv->stations[sta_id].ps_status = STA_PS_STATUS_SLEEP;
1173                 else if (!sta_awake && !ps_bit) {
1174                         iwl_sta_modify_ps_wake(priv, sta_id);
1175                         priv->stations[sta_id].ps_status = STA_PS_STATUS_WAKE;
1176                 }
1177         }
1178 }
1179