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

   1 /******************************************************************************
   2  *
   3  * Copyright(c) 2003 - 2008 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  * James P. Ketrenos <ipw2100-admin@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 #include "iwl-helpers.h"
  37
  38
  39 #define IWL_STA_DRIVER_ACTIVE BIT(0) /* driver entry is active */
  40 #define IWL_STA_UCODE_ACTIVE  BIT(1) /* ucode entry is active */
  41
  42 u8 iwl_find_station(struct iwl_priv *priv, const u8 *addr)
  43 {
  44         int i;
  45         int start = 0;
  46         int ret = IWL_INVALID_STATION;
  47         unsigned long flags;
  48
  49         if ((priv->iw_mode == NL80211_IFTYPE_ADHOC) ||
  50             (priv->iw_mode == NL80211_IFTYPE_AP))
  51                 start = IWL_STA_ID;
  52
  53         if (is_broadcast_ether_addr(addr))
  54                 return priv->hw_params.bcast_sta_id;
  55
  56         spin_lock_irqsave(&priv->sta_lock, flags);
  57         for (i = start; i < priv->hw_params.max_stations; i++)
  58                 if (priv->stations[i].used &&
  59                     (!compare_ether_addr(priv->stations[i].sta.sta.addr,
  60                                          addr))) {
  61                         ret = i;
  62                         goto out;
  63                 }
  64
  65         IWL_DEBUG_ASSOC_LIMIT("can not find STA %pM total %d\n",
  66                               addr, priv->num_stations);
  67
  68  out:
  69         spin_unlock_irqrestore(&priv->sta_lock, flags);
  70         return ret;
  71 }
  72 EXPORT_SYMBOL(iwl_find_station);
  73
  74 int iwl_get_ra_sta_id(struct iwl_priv *priv, struct ieee80211_hdr *hdr)
  75 {
  76         if (priv->iw_mode == NL80211_IFTYPE_STATION) {
  77                 return IWL_AP_ID;
  78         } else {
  79                 u8 *da = ieee80211_get_DA(hdr);
  80                 return iwl_find_station(priv, da);
  81         }
  82 }
  83 EXPORT_SYMBOL(iwl_get_ra_sta_id);
  84
  85 static void iwl_sta_ucode_activate(struct iwl_priv *priv, u8 sta_id)
  86 {
  87         unsigned long flags;
  88
  89         spin_lock_irqsave(&priv->sta_lock, flags);
  90
  91         if (!(priv->stations[sta_id].used & IWL_STA_DRIVER_ACTIVE))
  92                 IWL_ERROR("ACTIVATE a non DRIVER active station %d\n", sta_id);
  93
  94         priv->stations[sta_id].used |= IWL_STA_UCODE_ACTIVE;
  95         IWL_DEBUG_ASSOC("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_ERROR("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_ERROR("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("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 static 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_ERROR("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("REPLY_ADD_STA PASSED\n");
 170                         break;
 171                 default:
 172                         ret = -EIO;
 173                         IWL_WARNING("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
 184 static void iwl_set_ht_add_station(struct iwl_priv *priv, u8 index,
 185                                    struct ieee80211_sta_ht_cap *sta_ht_inf)
 186 {
 187         __le32 sta_flags;
 188         u8 mimo_ps_mode;
 189
 190         if (!sta_ht_inf || !sta_ht_inf->ht_supported)
 191                 goto done;
 192
 193         mimo_ps_mode = (sta_ht_inf->cap & IEEE80211_HT_CAP_SM_PS) >> 2;
 194
 195         sta_flags = priv->stations[index].sta.station_flags;
 196
 197         sta_flags &= ~(STA_FLG_RTS_MIMO_PROT_MSK | STA_FLG_MIMO_DIS_MSK);
 198
 199         switch (mimo_ps_mode) {
 200         case WLAN_HT_CAP_SM_PS_STATIC:
 201                 sta_flags |= STA_FLG_MIMO_DIS_MSK;
 202                 break;
 203         case WLAN_HT_CAP_SM_PS_DYNAMIC:
 204                 sta_flags |= STA_FLG_RTS_MIMO_PROT_MSK;
 205                 break;
 206         case WLAN_HT_CAP_SM_PS_DISABLED:
 207                 break;
 208         default:
 209                 IWL_WARNING("Invalid MIMO PS mode %d\n", mimo_ps_mode);
 210                 break;
 211         }
 212
 213         sta_flags |= cpu_to_le32(
 214               (u32)sta_ht_inf->ampdu_factor << STA_FLG_MAX_AGG_SIZE_POS);
 215
 216         sta_flags |= cpu_to_le32(
 217               (u32)sta_ht_inf->ampdu_density << STA_FLG_AGG_MPDU_DENSITY_POS);
 218
 219         if (iwl_is_fat_tx_allowed(priv, sta_ht_inf))
 220                 sta_flags |= STA_FLG_FAT_EN_MSK;
 221         else
 222                 sta_flags &= ~STA_FLG_FAT_EN_MSK;
 223
 224         priv->stations[index].sta.station_flags = sta_flags;
 225  done:
 226         return;
 227 }
 228
 229 /**
 230  * iwl_add_station_flags - Add station to tables in driver and device
 231  */
 232 u8 iwl_add_station_flags(struct iwl_priv *priv, const u8 *addr, int is_ap,
 233                          u8 flags, struct ieee80211_sta_ht_cap *ht_info)
 234 {
 235         int i;
 236         int sta_id = IWL_INVALID_STATION;
 237         struct iwl_station_entry *station;
 238         unsigned long flags_spin;
 239
 240         spin_lock_irqsave(&priv->sta_lock, flags_spin);
 241         if (is_ap)
 242                 sta_id = IWL_AP_ID;
 243         else if (is_broadcast_ether_addr(addr))
 244                 sta_id = priv->hw_params.bcast_sta_id;
 245         else
 246                 for (i = IWL_STA_ID; i < priv->hw_params.max_stations; i++) {
 247                         if (!compare_ether_addr(priv->stations[i].sta.sta.addr,
 248                                                 addr)) {
 249                                 sta_id = i;
 250                                 break;
 251                         }
 252
 253                         if (!priv->stations[i].used &&
 254                             sta_id == IWL_INVALID_STATION)
 255                                 sta_id = i;
 256                 }
 257
 258         /* These two conditions have the same outcome, but keep them separate
 259            since they have different meanings */
 260         if (unlikely(sta_id == IWL_INVALID_STATION)) {
 261                 spin_unlock_irqrestore(&priv->sta_lock, flags_spin);
 262                 return sta_id;
 263         }
 264
 265         if (priv->stations[sta_id].used &&
 266             !compare_ether_addr(priv->stations[sta_id].sta.sta.addr, addr)) {
 267                 spin_unlock_irqrestore(&priv->sta_lock, flags_spin);
 268                 return sta_id;
 269         }
 270
 271
 272         station = &priv->stations[sta_id];
 273         station->used = IWL_STA_DRIVER_ACTIVE;
 274         IWL_DEBUG_ASSOC("Add STA to driver ID %d: %pM\n",
 275                         sta_id, addr);
 276         priv->num_stations++;
 277
 278         /* Set up the REPLY_ADD_STA command to send to device */
 279         memset(&station->sta, 0, sizeof(struct iwl_addsta_cmd));
 280         memcpy(station->sta.sta.addr, addr, ETH_ALEN);
 281         station->sta.mode = 0;
 282         station->sta.sta.sta_id = sta_id;
 283         station->sta.station_flags = 0;
 284
 285         /* BCAST station and IBSS stations do not work in HT mode */
 286         if (sta_id != priv->hw_params.bcast_sta_id &&
 287             priv->iw_mode != NL80211_IFTYPE_ADHOC)
 288                 iwl_set_ht_add_station(priv, sta_id, ht_info);
 289
 290         spin_unlock_irqrestore(&priv->sta_lock, flags_spin);
 291
 292         /* Add station to device's station table */
 293         iwl_send_add_sta(priv, &station->sta, flags);
 294         return sta_id;
 295
 296 }
 297 EXPORT_SYMBOL(iwl_add_station_flags);
 298
 299 static void iwl_sta_ucode_deactivate(struct iwl_priv *priv, const char *addr)
 300 {
 301         unsigned long flags;
 302         u8 sta_id = iwl_find_station(priv, addr);
 303
 304         BUG_ON(sta_id == IWL_INVALID_STATION);
 305
 306         IWL_DEBUG_ASSOC("Removed STA from Ucode: %pM\n", addr);
 307
 308         spin_lock_irqsave(&priv->sta_lock, flags);
 309
 310         /* Ucode must be active and driver must be non active */
 311         if (priv->stations[sta_id].used != IWL_STA_UCODE_ACTIVE)
 312                 IWL_ERROR("removed non active STA %d\n", sta_id);
 313
 314         priv->stations[sta_id].used &= ~IWL_STA_UCODE_ACTIVE;
 315
 316         memset(&priv->stations[sta_id], 0, sizeof(struct iwl_station_entry));
 317         spin_unlock_irqrestore(&priv->sta_lock, flags);
 318 }
 319
 320 static int iwl_remove_sta_callback(struct iwl_priv *priv,
 321                                    struct iwl_cmd *cmd, struct sk_buff *skb)
 322 {
 323         struct iwl_rx_packet *res = NULL;
 324         struct iwl_rem_sta_cmd *rm_sta =
 325                  (struct iwl_rem_sta_cmd *)cmd->cmd.payload;
 326         const char *addr = rm_sta->addr;
 327
 328         if (!skb) {
 329                 IWL_ERROR("Error: Response NULL in REPLY_REMOVE_STA.\n");
 330                 return 1;
 331         }
 332
 333         res = (struct iwl_rx_packet *)skb->data;
 334         if (res->hdr.flags & IWL_CMD_FAILED_MSK) {
 335                 IWL_ERROR("Bad return from REPLY_REMOVE_STA (0x%08X)\n",
 336                 res->hdr.flags);
 337                 return 1;
 338         }
 339
 340         switch (res->u.rem_sta.status) {
 341         case REM_STA_SUCCESS_MSK:
 342                 iwl_sta_ucode_deactivate(priv, addr);
 343                 break;
 344         default:
 345                 IWL_ERROR("REPLY_REMOVE_STA failed\n");
 346                 break;
 347         }
 348
 349         /* We didn't cache the SKB; let the caller free it */
 350         return 1;
 351 }
 352
 353 static int iwl_send_remove_station(struct iwl_priv *priv, const u8 *addr,
 354                                    u8 flags)
 355 {
 356         struct iwl_rx_packet *res = NULL;
 357         int ret;
 358
 359         struct iwl_rem_sta_cmd rm_sta_cmd;
 360
 361         struct iwl_host_cmd cmd = {
 362                 .id = REPLY_REMOVE_STA,
 363                 .len = sizeof(struct iwl_rem_sta_cmd),
 364                 .meta.flags = flags,
 365                 .data = &rm_sta_cmd,
 366         };
 367
 368         memset(&rm_sta_cmd, 0, sizeof(rm_sta_cmd));
 369         rm_sta_cmd.num_sta = 1;
 370         memcpy(&rm_sta_cmd.addr, addr , ETH_ALEN);
 371
 372         if (flags & CMD_ASYNC)
 373                 cmd.meta.u.callback = iwl_remove_sta_callback;
 374         else
 375                 cmd.meta.flags |= CMD_WANT_SKB;
 376         ret = iwl_send_cmd(priv, &cmd);
 377
 378         if (ret || (flags & CMD_ASYNC))
 379                 return ret;
 380
 381         res = (struct iwl_rx_packet *)cmd.meta.u.skb->data;
 382         if (res->hdr.flags & IWL_CMD_FAILED_MSK) {
 383                 IWL_ERROR("Bad return from REPLY_REMOVE_STA (0x%08X)\n",
 384                           res->hdr.flags);
 385                 ret = -EIO;
 386         }
 387
 388         if (!ret) {
 389                 switch (res->u.rem_sta.status) {
 390                 case REM_STA_SUCCESS_MSK:
 391                         iwl_sta_ucode_deactivate(priv, addr);
 392                         IWL_DEBUG_ASSOC("REPLY_REMOVE_STA PASSED\n");
 393                         break;
 394                 default:
 395                         ret = -EIO;
 396                         IWL_ERROR("REPLY_REMOVE_STA failed\n");
 397                         break;
 398                 }
 399         }
 400
 401         priv->alloc_rxb_skb--;
 402         dev_kfree_skb_any(cmd.meta.u.skb);
 403
 404         return ret;
 405 }
 406
 407 /**
 408  * iwl_remove_station - Remove driver's knowledge of station.
 409  */
 410 int iwl_remove_station(struct iwl_priv *priv, const u8 *addr, int is_ap)
 411 {
 412         int sta_id = IWL_INVALID_STATION;
 413         int i, ret = -EINVAL;
 414         unsigned long flags;
 415
 416         spin_lock_irqsave(&priv->sta_lock, flags);
 417
 418         if (is_ap)
 419                 sta_id = IWL_AP_ID;
 420         else if (is_broadcast_ether_addr(addr))
 421                 sta_id = priv->hw_params.bcast_sta_id;
 422         else
 423                 for (i = IWL_STA_ID; i < priv->hw_params.max_stations; i++)
 424                         if (priv->stations[i].used &&
 425                             !compare_ether_addr(priv->stations[i].sta.sta.addr,
 426                                                 addr)) {
 427                                 sta_id = i;
 428                                 break;
 429                         }
 430
 431         if (unlikely(sta_id == IWL_INVALID_STATION))
 432                 goto out;
 433
 434         IWL_DEBUG_ASSOC("Removing STA from driver:%d  %pM\n",
 435                 sta_id, addr);
 436
 437         if (!(priv->stations[sta_id].used & IWL_STA_DRIVER_ACTIVE)) {
 438                 IWL_ERROR("Removing %pM but non DRIVER active\n",
 439                                 addr);
 440                 goto out;
 441         }
 442
 443         if (!(priv->stations[sta_id].used & IWL_STA_UCODE_ACTIVE)) {
 444                 IWL_ERROR("Removing %pM but non UCODE active\n",
 445                                 addr);
 446                 goto out;
 447         }
 448
 449
 450         priv->stations[sta_id].used &= ~IWL_STA_DRIVER_ACTIVE;
 451
 452         priv->num_stations--;
 453
 454         BUG_ON(priv->num_stations < 0);
 455
 456         spin_unlock_irqrestore(&priv->sta_lock, flags);
 457
 458         ret = iwl_send_remove_station(priv, addr, CMD_ASYNC);
 459         return ret;
 460 out:
 461         spin_unlock_irqrestore(&priv->sta_lock, flags);
 462         return ret;
 463 }
 464 EXPORT_SYMBOL(iwl_remove_station);
 465
 466 /**
 467  * iwl_clear_stations_table - Clear the driver's station table
 468  *
 469  * NOTE:  This does not clear or otherwise alter the device's station table.
 470  */
 471 void iwl_clear_stations_table(struct iwl_priv *priv)
 472 {
 473         unsigned long flags;
 474
 475         spin_lock_irqsave(&priv->sta_lock, flags);
 476
 477         if (iwl_is_alive(priv) &&
 478            !test_bit(STATUS_EXIT_PENDING, &priv->status) &&
 479            iwl_send_cmd_pdu_async(priv, REPLY_REMOVE_ALL_STA, 0, NULL, NULL))
 480                 IWL_ERROR("Couldn't clear the station table\n");
 481
 482         priv->num_stations = 0;
 483         memset(priv->stations, 0, sizeof(priv->stations));
 484
 485         spin_unlock_irqrestore(&priv->sta_lock, flags);
 486 }
 487 EXPORT_SYMBOL(iwl_clear_stations_table);
 488
 489 static int iwl_get_free_ucode_key_index(struct iwl_priv *priv)
 490 {
 491         int i;
 492
 493         for (i = 0; i < STA_KEY_MAX_NUM; i++)
 494                 if (!test_and_set_bit(i, &priv->ucode_key_table))
 495                         return i;
 496
 497         return -1;
 498 }
 499
 500 int iwl_send_static_wepkey_cmd(struct iwl_priv *priv, u8 send_if_empty)
 501 {
 502         int i, not_empty = 0;
 503         u8 buff[sizeof(struct iwl_wep_cmd) +
 504                 sizeof(struct iwl_wep_key) * WEP_KEYS_MAX];
 505         struct iwl_wep_cmd *wep_cmd = (struct iwl_wep_cmd *)buff;
 506         size_t cmd_size  = sizeof(struct iwl_wep_cmd);
 507         struct iwl_host_cmd cmd = {
 508                 .id = REPLY_WEPKEY,
 509                 .data = wep_cmd,
 510                 .meta.flags = CMD_ASYNC,
 511         };
 512
 513         memset(wep_cmd, 0, cmd_size +
 514                         (sizeof(struct iwl_wep_key) * WEP_KEYS_MAX));
 515
 516         for (i = 0; i < WEP_KEYS_MAX ; i++) {
 517                 wep_cmd->key[i].key_index = i;
 518                 if (priv->wep_keys[i].key_size) {
 519                         wep_cmd->key[i].key_offset = i;
 520                         not_empty = 1;
 521                 } else {
 522                         wep_cmd->key[i].key_offset = WEP_INVALID_OFFSET;
 523                 }
 524
 525                 wep_cmd->key[i].key_size = priv->wep_keys[i].key_size;
 526                 memcpy(&wep_cmd->key[i].key[3], priv->wep_keys[i].key,
 527                                 priv->wep_keys[i].key_size);
 528         }
 529
 530         wep_cmd->global_key_type = WEP_KEY_WEP_TYPE;
 531         wep_cmd->num_keys = WEP_KEYS_MAX;
 532
 533         cmd_size += sizeof(struct iwl_wep_key) * WEP_KEYS_MAX;
 534
 535         cmd.len = cmd_size;
 536
 537         if (not_empty || send_if_empty)
 538                 return iwl_send_cmd(priv, &cmd);
 539         else
 540                 return 0;
 541 }
 542 EXPORT_SYMBOL(iwl_send_static_wepkey_cmd);
 543
 544 int iwl_remove_default_wep_key(struct iwl_priv *priv,
 545                                struct ieee80211_key_conf *keyconf)
 546 {
 547         int ret;
 548         unsigned long flags;
 549
 550         spin_lock_irqsave(&priv->sta_lock, flags);
 551
 552         if (!test_and_clear_bit(keyconf->keyidx, &priv->ucode_key_table))
 553                 IWL_ERROR("index %d not used in uCode key table.\n",
 554                           keyconf->keyidx);
 555
 556         priv->default_wep_key--;
 557         memset(&priv->wep_keys[keyconf->keyidx], 0, sizeof(priv->wep_keys[0]));
 558         ret = iwl_send_static_wepkey_cmd(priv, 1);
 559         IWL_DEBUG_WEP("Remove default WEP key: idx=%d ret=%d\n",
 560                       keyconf->keyidx, ret);
 561         spin_unlock_irqrestore(&priv->sta_lock, flags);
 562
 563         return ret;
 564 }
 565 EXPORT_SYMBOL(iwl_remove_default_wep_key);
 566
 567 int iwl_set_default_wep_key(struct iwl_priv *priv,
 568                             struct ieee80211_key_conf *keyconf)
 569 {
 570         int ret;
 571         unsigned long flags;
 572
 573         if (keyconf->keylen != WEP_KEY_LEN_128 &&
 574             keyconf->keylen != WEP_KEY_LEN_64) {
 575                 IWL_DEBUG_WEP("Bad WEP key length %d\n", keyconf->keylen);
 576                 return -EINVAL;
 577         }
 578
 579         keyconf->flags &= ~IEEE80211_KEY_FLAG_GENERATE_IV;
 580         keyconf->hw_key_idx = HW_KEY_DEFAULT;
 581         priv->stations[IWL_AP_ID].keyinfo.alg = ALG_WEP;
 582
 583         spin_lock_irqsave(&priv->sta_lock, flags);
 584         priv->default_wep_key++;
 585
 586         if (test_and_set_bit(keyconf->keyidx, &priv->ucode_key_table))
 587                 IWL_ERROR("index %d already used in uCode key table.\n",
 588                         keyconf->keyidx);
 589
 590         priv->wep_keys[keyconf->keyidx].key_size = keyconf->keylen;
 591         memcpy(&priv->wep_keys[keyconf->keyidx].key, &keyconf->key,
 592                                                         keyconf->keylen);
 593
 594         ret = iwl_send_static_wepkey_cmd(priv, 0);
 595         IWL_DEBUG_WEP("Set default WEP key: len=%d idx=%d ret=%d\n",
 596                 keyconf->keylen, keyconf->keyidx, ret);
 597         spin_unlock_irqrestore(&priv->sta_lock, flags);
 598
 599         return ret;
 600 }
 601 EXPORT_SYMBOL(iwl_set_default_wep_key);
 602
 603 static int iwl_set_wep_dynamic_key_info(struct iwl_priv *priv,
 604                                 struct ieee80211_key_conf *keyconf,
 605                                 u8 sta_id)
 606 {
 607         unsigned long flags;
 608         __le16 key_flags = 0;
 609         int ret;
 610
 611         keyconf->flags &= ~IEEE80211_KEY_FLAG_GENERATE_IV;
 612
 613         key_flags |= (STA_KEY_FLG_WEP | STA_KEY_FLG_MAP_KEY_MSK);
 614         key_flags |= cpu_to_le16(keyconf->keyidx << STA_KEY_FLG_KEYID_POS);
 615         key_flags &= ~STA_KEY_FLG_INVALID;
 616
 617         if (keyconf->keylen == WEP_KEY_LEN_128)
 618                 key_flags |= STA_KEY_FLG_KEY_SIZE_MSK;
 619
 620         if (sta_id == priv->hw_params.bcast_sta_id)
 621                 key_flags |= STA_KEY_MULTICAST_MSK;
 622
 623         spin_lock_irqsave(&priv->sta_lock, flags);
 624
 625         priv->stations[sta_id].keyinfo.alg = keyconf->alg;
 626         priv->stations[sta_id].keyinfo.keylen = keyconf->keylen;
 627         priv->stations[sta_id].keyinfo.keyidx = keyconf->keyidx;
 628
 629         memcpy(priv->stations[sta_id].keyinfo.key,
 630                                 keyconf->key, keyconf->keylen);
 631
 632         memcpy(&priv->stations[sta_id].sta.key.key[3],
 633                                 keyconf->key, keyconf->keylen);
 634
 635         if ((priv->stations[sta_id].sta.key.key_flags & STA_KEY_FLG_ENCRYPT_MSK)
 636                         == STA_KEY_FLG_NO_ENC)
 637                 priv->stations[sta_id].sta.key.key_offset =
 638                                  iwl_get_free_ucode_key_index(priv);
 639         /* else, we are overriding an existing key => no need to allocated room
 640          * in uCode. */
 641
 642         priv->stations[sta_id].sta.key.key_flags = key_flags;
 643         priv->stations[sta_id].sta.sta.modify_mask = STA_MODIFY_KEY_MASK;
 644         priv->stations[sta_id].sta.mode = STA_CONTROL_MODIFY_MSK;
 645
 646         ret = iwl_send_add_sta(priv, &priv->stations[sta_id].sta, CMD_ASYNC);
 647
 648         spin_unlock_irqrestore(&priv->sta_lock, flags);
 649
 650         return ret;
 651 }
 652
 653 static int iwl_set_ccmp_dynamic_key_info(struct iwl_priv *priv,
 654                                    struct ieee80211_key_conf *keyconf,
 655                                    u8 sta_id)
 656 {
 657         unsigned long flags;
 658         __le16 key_flags = 0;
 659
 660         key_flags |= (STA_KEY_FLG_CCMP | STA_KEY_FLG_MAP_KEY_MSK);
 661         key_flags |= cpu_to_le16(keyconf->keyidx << STA_KEY_FLG_KEYID_POS);
 662         key_flags &= ~STA_KEY_FLG_INVALID;
 663
 664         if (sta_id == priv->hw_params.bcast_sta_id)
 665                 key_flags |= STA_KEY_MULTICAST_MSK;
 666
 667         keyconf->flags |= IEEE80211_KEY_FLAG_GENERATE_IV;
 668
 669         spin_lock_irqsave(&priv->sta_lock, flags);
 670         priv->stations[sta_id].keyinfo.alg = keyconf->alg;
 671         priv->stations[sta_id].keyinfo.keylen = keyconf->keylen;
 672
 673         memcpy(priv->stations[sta_id].keyinfo.key, keyconf->key,
 674                keyconf->keylen);
 675
 676         memcpy(priv->stations[sta_id].sta.key.key, keyconf->key,
 677                keyconf->keylen);
 678
 679         if ((priv->stations[sta_id].sta.key.key_flags & STA_KEY_FLG_ENCRYPT_MSK)
 680                         == STA_KEY_FLG_NO_ENC)
 681                 priv->stations[sta_id].sta.key.key_offset =
 682                                  iwl_get_free_ucode_key_index(priv);
 683         /* else, we are overriding an existing key => no need to allocated room
 684          * in uCode. */
 685
 686         priv->stations[sta_id].sta.key.key_flags = key_flags;
 687         priv->stations[sta_id].sta.sta.modify_mask = STA_MODIFY_KEY_MASK;
 688         priv->stations[sta_id].sta.mode = STA_CONTROL_MODIFY_MSK;
 689
 690         spin_unlock_irqrestore(&priv->sta_lock, flags);
 691
 692         IWL_DEBUG_INFO("hwcrypto: modify ucode station key info\n");
 693         return iwl_send_add_sta(priv, &priv->stations[sta_id].sta, CMD_ASYNC);
 694 }
 695
 696 static int iwl_set_tkip_dynamic_key_info(struct iwl_priv *priv,
 697                                    struct ieee80211_key_conf *keyconf,
 698                                    u8 sta_id)
 699 {
 700         unsigned long flags;
 701         int ret = 0;
 702
 703         keyconf->flags |= IEEE80211_KEY_FLAG_GENERATE_IV;
 704         keyconf->flags |= IEEE80211_KEY_FLAG_GENERATE_MMIC;
 705
 706         spin_lock_irqsave(&priv->sta_lock, flags);
 707
 708         priv->stations[sta_id].keyinfo.alg = keyconf->alg;
 709         priv->stations[sta_id].keyinfo.keylen = 16;
 710
 711         if ((priv->stations[sta_id].sta.key.key_flags & STA_KEY_FLG_ENCRYPT_MSK)
 712                         == STA_KEY_FLG_NO_ENC)
 713                 priv->stations[sta_id].sta.key.key_offset =
 714                                  iwl_get_free_ucode_key_index(priv);
 715         /* else, we are overriding an existing key => no need to allocated room
 716          * in uCode. */
 717
 718         /* This copy is actually not needed: we get the key with each TX */
 719         memcpy(priv->stations[sta_id].keyinfo.key, keyconf->key, 16);
 720
 721         memcpy(priv->stations[sta_id].sta.key.key, keyconf->key, 16);
 722
 723         spin_unlock_irqrestore(&priv->sta_lock, flags);
 724
 725         return ret;
 726 }
 727
 728 void iwl_update_tkip_key(struct iwl_priv *priv,
 729                         struct ieee80211_key_conf *keyconf,
 730                         const u8 *addr, u32 iv32, u16 *phase1key)
 731 {
 732         u8 sta_id = IWL_INVALID_STATION;
 733         unsigned long flags;
 734         __le16 key_flags = 0;
 735         int i;
 736         DECLARE_MAC_BUF(mac);
 737
 738         sta_id = iwl_find_station(priv, addr);
 739         if (sta_id == IWL_INVALID_STATION) {
 740                 IWL_DEBUG_MAC80211("leave - %pM not in station map.\n",
 741                                    addr);
 742                 return;
 743         }
 744
 745         if (iwl_scan_cancel(priv)) {
 746                 /* cancel scan failed, just live w/ bad key and rely
 747                    briefly on SW decryption */
 748                 return;
 749         }
 750
 751         key_flags |= (STA_KEY_FLG_TKIP | STA_KEY_FLG_MAP_KEY_MSK);
 752         key_flags |= cpu_to_le16(keyconf->keyidx << STA_KEY_FLG_KEYID_POS);
 753         key_flags &= ~STA_KEY_FLG_INVALID;
 754
 755         if (sta_id == priv->hw_params.bcast_sta_id)
 756                 key_flags |= STA_KEY_MULTICAST_MSK;
 757
 758         spin_lock_irqsave(&priv->sta_lock, flags);
 759
 760         priv->stations[sta_id].sta.key.key_flags = key_flags;
 761         priv->stations[sta_id].sta.key.tkip_rx_tsc_byte2 = (u8) iv32;
 762
 763         for (i = 0; i < 5; i++)
 764                 priv->stations[sta_id].sta.key.tkip_rx_ttak[i] =
 765                         cpu_to_le16(phase1key[i]);
 766
 767         priv->stations[sta_id].sta.sta.modify_mask = STA_MODIFY_KEY_MASK;
 768         priv->stations[sta_id].sta.mode = STA_CONTROL_MODIFY_MSK;
 769
 770         iwl_send_add_sta(priv, &priv->stations[sta_id].sta, CMD_ASYNC);
 771
 772         spin_unlock_irqrestore(&priv->sta_lock, flags);
 773
 774 }
 775 EXPORT_SYMBOL(iwl_update_tkip_key);
 776
 777 int iwl_remove_dynamic_key(struct iwl_priv *priv,
 778                                 struct ieee80211_key_conf *keyconf,
 779                                 u8 sta_id)
 780 {
 781         unsigned long flags;
 782         int ret = 0;
 783         u16 key_flags;
 784         u8 keyidx;
 785
 786         priv->key_mapping_key--;
 787
 788         spin_lock_irqsave(&priv->sta_lock, flags);
 789         key_flags = le16_to_cpu(priv->stations[sta_id].sta.key.key_flags);
 790         keyidx = (key_flags >> STA_KEY_FLG_KEYID_POS) & 0x3;
 791
 792         IWL_DEBUG_WEP("Remove dynamic key: idx=%d sta=%d\n",
 793                       keyconf->keyidx, sta_id);
 794
 795         if (keyconf->keyidx != keyidx) {
 796                 /* We need to remove a key with index different that the one
 797                  * in the uCode. This means that the key we need to remove has
 798                  * been replaced by another one with different index.
 799                  * Don't do anything and return ok
 800                  */
 801                 spin_unlock_irqrestore(&priv->sta_lock, flags);
 802                 return 0;
 803         }
 804
 805         if (!test_and_clear_bit(priv->stations[sta_id].sta.key.key_offset,
 806                 &priv->ucode_key_table))
 807                 IWL_ERROR("index %d not used in uCode key table.\n",
 808                         priv->stations[sta_id].sta.key.key_offset);
 809         memset(&priv->stations[sta_id].keyinfo, 0,
 810                                         sizeof(struct iwl_hw_key));
 811         memset(&priv->stations[sta_id].sta.key, 0,
 812                                         sizeof(struct iwl4965_keyinfo));
 813         priv->stations[sta_id].sta.key.key_flags =
 814                         STA_KEY_FLG_NO_ENC | STA_KEY_FLG_INVALID;
 815         priv->stations[sta_id].sta.key.key_offset = WEP_INVALID_OFFSET;
 816         priv->stations[sta_id].sta.sta.modify_mask = STA_MODIFY_KEY_MASK;
 817         priv->stations[sta_id].sta.mode = STA_CONTROL_MODIFY_MSK;
 818
 819         ret =  iwl_send_add_sta(priv, &priv->stations[sta_id].sta, CMD_ASYNC);
 820         spin_unlock_irqrestore(&priv->sta_lock, flags);
 821         return ret;
 822 }
 823 EXPORT_SYMBOL(iwl_remove_dynamic_key);
 824
 825 int iwl_set_dynamic_key(struct iwl_priv *priv,
 826                                 struct ieee80211_key_conf *keyconf, u8 sta_id)
 827 {
 828         int ret;
 829
 830         priv->key_mapping_key++;
 831         keyconf->hw_key_idx = HW_KEY_DYNAMIC;
 832
 833         switch (keyconf->alg) {
 834         case ALG_CCMP:
 835                 ret = iwl_set_ccmp_dynamic_key_info(priv, keyconf, sta_id);
 836                 break;
 837         case ALG_TKIP:
 838                 ret = iwl_set_tkip_dynamic_key_info(priv, keyconf, sta_id);
 839                 break;
 840         case ALG_WEP:
 841                 ret = iwl_set_wep_dynamic_key_info(priv, keyconf, sta_id);
 842                 break;
 843         default:
 844                 IWL_ERROR("Unknown alg: %s alg = %d\n", __func__, keyconf->alg);
 845                 ret = -EINVAL;
 846         }
 847
 848         IWL_DEBUG_WEP("Set dynamic key: alg= %d len=%d idx=%d sta=%d ret=%d\n",
 849                       keyconf->alg, keyconf->keylen, keyconf->keyidx,
 850                       sta_id, ret);
 851
 852         return ret;
 853 }
 854 EXPORT_SYMBOL(iwl_set_dynamic_key);
 855
 856 #ifdef CONFIG_IWLWIFI_DEBUG
 857 static void iwl_dump_lq_cmd(struct iwl_priv *priv,
 858                            struct iwl_link_quality_cmd *lq)
 859 {
 860         int i;
 861         IWL_DEBUG_RATE("lq station id 0x%x\n", lq->sta_id);
 862         IWL_DEBUG_RATE("lq ant 0x%X 0x%X\n",
 863                        lq->general_params.single_stream_ant_msk,
 864                        lq->general_params.dual_stream_ant_msk);
 865
 866         for (i = 0; i < LINK_QUAL_MAX_RETRY_NUM; i++)
 867                 IWL_DEBUG_RATE("lq index %d 0x%X\n",
 868                                i, lq->rs_table[i].rate_n_flags);
 869 }
 870 #else
 871 static inline void iwl_dump_lq_cmd(struct iwl_priv *priv,
 872                                    struct iwl_link_quality_cmd *lq)
 873 {
 874 }
 875 #endif
 876
 877 int iwl_send_lq_cmd(struct iwl_priv *priv,
 878                     struct iwl_link_quality_cmd *lq, u8 flags)
 879 {
 880         struct iwl_host_cmd cmd = {
 881                 .id = REPLY_TX_LINK_QUALITY_CMD,
 882                 .len = sizeof(struct iwl_link_quality_cmd),
 883                 .meta.flags = flags,
 884                 .data = lq,
 885         };
 886
 887         if ((lq->sta_id == 0xFF) &&
 888             (priv->iw_mode == NL80211_IFTYPE_ADHOC))
 889                 return -EINVAL;
 890
 891         if (lq->sta_id == 0xFF)
 892                 lq->sta_id = IWL_AP_ID;
 893
 894         iwl_dump_lq_cmd(priv, lq);
 895
 896         if (iwl_is_associated(priv) && priv->assoc_station_added)
 897                 return  iwl_send_cmd(priv, &cmd);
 898
 899         return 0;
 900 }
 901 EXPORT_SYMBOL(iwl_send_lq_cmd);
 902
 903 /**
 904  * iwl_sta_init_lq - Initialize a station's hardware rate table
 905  *
 906  * The uCode's station table contains a table of fallback rates
 907  * for automatic fallback during transmission.
 908  *
 909  * NOTE: This sets up a default set of values.  These will be replaced later
 910  *       if the driver's iwl-agn-rs rate scaling algorithm is used, instead of
 911  *       rc80211_simple.
 912  *
 913  * NOTE: Run REPLY_ADD_STA command to set up station table entry, before
 914  *       calling this function (which runs REPLY_TX_LINK_QUALITY_CMD,
 915  *       which requires station table entry to exist).
 916  */
 917 static void iwl_sta_init_lq(struct iwl_priv *priv, const u8 *addr, int is_ap)
 918 {
 919         int i, r;
 920         struct iwl_link_quality_cmd link_cmd = {
 921                 .reserved1 = 0,
 922         };
 923         u32 rate_flags;
 924
 925         /* Set up the rate scaling to start at selected rate, fall back
 926          * all the way down to 1M in IEEE order, and then spin on 1M */
 927         if (is_ap)
 928                 r = IWL_RATE_54M_INDEX;
 929         else if (priv->band == IEEE80211_BAND_5GHZ)
 930                 r = IWL_RATE_6M_INDEX;
 931         else
 932                 r = IWL_RATE_1M_INDEX;
 933
 934         for (i = 0; i < LINK_QUAL_MAX_RETRY_NUM; i++) {
 935                 rate_flags = 0;
 936                 if (r >= IWL_FIRST_CCK_RATE && r <= IWL_LAST_CCK_RATE)
 937                         rate_flags |= RATE_MCS_CCK_MSK;
 938
 939                 rate_flags |= first_antenna(priv->hw_params.valid_tx_ant) <<
 940                                 RATE_MCS_ANT_POS;
 941
 942                 link_cmd.rs_table[i].rate_n_flags =
 943                         iwl_hw_set_rate_n_flags(iwl_rates[r].plcp, rate_flags);
 944                 r = iwl_get_prev_ieee_rate(r);
 945         }
 946
 947         link_cmd.general_params.single_stream_ant_msk =
 948                                 first_antenna(priv->hw_params.valid_tx_ant);
 949         link_cmd.general_params.dual_stream_ant_msk = 3;
 950         link_cmd.agg_params.agg_dis_start_th = 3;
 951         link_cmd.agg_params.agg_time_limit = cpu_to_le16(4000);
 952
 953         /* Update the rate scaling for control frame Tx to AP */
 954         link_cmd.sta_id = is_ap ? IWL_AP_ID : priv->hw_params.bcast_sta_id;
 955
 956         iwl_send_cmd_pdu_async(priv, REPLY_TX_LINK_QUALITY_CMD,
 957                                sizeof(link_cmd), &link_cmd, NULL);
 958 }
 959
 960 /**
 961  * iwl_rxon_add_station - add station into station table.
 962  *
 963  * there is only one AP station with id= IWL_AP_ID
 964  * NOTE: mutex must be held before calling this function
 965  */
 966 int iwl_rxon_add_station(struct iwl_priv *priv, const u8 *addr, int is_ap)
 967 {
 968         struct ieee80211_sta *sta;
 969         struct ieee80211_sta_ht_cap ht_config;
 970         struct ieee80211_sta_ht_cap *cur_ht_config = NULL;
 971         u8 sta_id;
 972
 973         /* Add station to device's station table */
 974
 975         /*
 976          * XXX: This check is definitely not correct, if we're an AP
 977          *      it'll always be false which is not what we want, but
 978          *      it doesn't look like iwlagn is prepared to be an HT
 979          *      AP anyway.
 980          */
 981         if (priv->current_ht_config.is_ht) {
 982                 rcu_read_lock();
 983                 sta = ieee80211_find_sta(priv->hw, addr);
 984                 if (sta) {
 985                         memcpy(&ht_config, &sta->ht_cap, sizeof(ht_config));
 986                         cur_ht_config = &ht_config;
 987                 }
 988                 rcu_read_unlock();
 989         }
 990
 991         sta_id = iwl_add_station_flags(priv, addr, is_ap,
 992                                        0, cur_ht_config);
 993
 994         /* Set up default rate scaling table in device's station table */
 995         iwl_sta_init_lq(priv, addr, is_ap);
 996
 997         return sta_id;
 998 }
 999 EXPORT_SYMBOL(iwl_rxon_add_station);
1000
1001 /**
1002  * iwl_get_sta_id - Find station's index within station table
1003  *
1004  * If new IBSS station, create new entry in station table
1005  */
1006 int iwl_get_sta_id(struct iwl_priv *priv, struct ieee80211_hdr *hdr)
1007 {
1008         int sta_id;
1009         u16 fc = le16_to_cpu(hdr->frame_control);
1010
1011         /* If this frame is broadcast or management, use broadcast station id */
1012         if (((fc & IEEE80211_FCTL_FTYPE) != IEEE80211_FTYPE_DATA) ||
1013             is_multicast_ether_addr(hdr->addr1))
1014                 return priv->hw_params.bcast_sta_id;
1015
1016         switch (priv->iw_mode) {
1017
1018         /* If we are a client station in a BSS network, use the special
1019          * AP station entry (that's the only station we communicate with) */
1020         case NL80211_IFTYPE_STATION:
1021                 return IWL_AP_ID;
1022
1023         /* If we are an AP, then find the station, or use BCAST */
1024         case NL80211_IFTYPE_AP:
1025                 sta_id = iwl_find_station(priv, hdr->addr1);
1026                 if (sta_id != IWL_INVALID_STATION)
1027                         return sta_id;
1028                 return priv->hw_params.bcast_sta_id;
1029
1030         /* If this frame is going out to an IBSS network, find the station,
1031          * or create a new station table entry */
1032         case NL80211_IFTYPE_ADHOC:
1033                 sta_id = iwl_find_station(priv, hdr->addr1);
1034                 if (sta_id != IWL_INVALID_STATION)
1035                         return sta_id;
1036
1037                 /* Create new station table entry */
1038                 sta_id = iwl_add_station_flags(priv, hdr->addr1,
1039                                                    0, CMD_ASYNC, NULL);
1040
1041                 if (sta_id != IWL_INVALID_STATION)
1042                         return sta_id;
1043
1044                 IWL_DEBUG_DROP("Station %pM not in station map. "
1045                                "Defaulting to broadcast...\n",
1046                                hdr->addr1);
1047                 iwl_print_hex_dump(priv, IWL_DL_DROP, (u8 *) hdr, sizeof(*hdr));
1048                 return priv->hw_params.bcast_sta_id;
1049
1050         /* If we are in monitor mode, use BCAST. This is required for
1051          * packet injection. */
1052         case NL80211_IFTYPE_MONITOR:
1053                 return priv->hw_params.bcast_sta_id;
1054
1055         default:
1056                 IWL_WARNING("Unknown mode of operation: %d\n", priv->iw_mode);
1057                 return priv->hw_params.bcast_sta_id;
1058         }
1059 }
1060 EXPORT_SYMBOL(iwl_get_sta_id);
1061
1062 /**
1063  * iwl_sta_tx_modify_enable_tid - Enable Tx for this TID in station table
1064  */
1065 void iwl_sta_tx_modify_enable_tid(struct iwl_priv *priv, int sta_id, int tid)
1066 {
1067         unsigned long flags;
1068
1069         /* Remove "disable" flag, to enable Tx for this TID */
1070         spin_lock_irqsave(&priv->sta_lock, flags);
1071         priv->stations[sta_id].sta.sta.modify_mask = STA_MODIFY_TID_DISABLE_TX;
1072         priv->stations[sta_id].sta.tid_disable_tx &= cpu_to_le16(~(1 << tid));
1073         priv->stations[sta_id].sta.mode = STA_CONTROL_MODIFY_MSK;
1074         spin_unlock_irqrestore(&priv->sta_lock, flags);
1075
1076         iwl_send_add_sta(priv, &priv->stations[sta_id].sta, CMD_ASYNC);
1077 }
1078 EXPORT_SYMBOL(iwl_sta_tx_modify_enable_tid);
1079
1080 int iwl_sta_rx_agg_start(struct iwl_priv *priv,
1081                          const u8 *addr, int tid, u16 ssn)
1082 {
1083         unsigned long flags;
1084         int sta_id;
1085
1086         sta_id = iwl_find_station(priv, addr);
1087         if (sta_id == IWL_INVALID_STATION)
1088                 return -ENXIO;
1089
1090         spin_lock_irqsave(&priv->sta_lock, flags);
1091         priv->stations[sta_id].sta.station_flags_msk = 0;
1092         priv->stations[sta_id].sta.sta.modify_mask = STA_MODIFY_ADDBA_TID_MSK;
1093         priv->stations[sta_id].sta.add_immediate_ba_tid = (u8)tid;
1094         priv->stations[sta_id].sta.add_immediate_ba_ssn = cpu_to_le16(ssn);
1095         priv->stations[sta_id].sta.mode = STA_CONTROL_MODIFY_MSK;
1096         spin_unlock_irqrestore(&priv->sta_lock, flags);
1097
1098         return iwl_send_add_sta(priv, &priv->stations[sta_id].sta,
1099                                         CMD_ASYNC);
1100 }
1101 EXPORT_SYMBOL(iwl_sta_rx_agg_start);
1102
1103 int iwl_sta_rx_agg_stop(struct iwl_priv *priv, const u8 *addr, int tid)
1104 {
1105         unsigned long flags;
1106         int sta_id;
1107
1108         sta_id = iwl_find_station(priv, addr);
1109         if (sta_id == IWL_INVALID_STATION)
1110                 return -ENXIO;
1111
1112         spin_lock_irqsave(&priv->sta_lock, flags);
1113         priv->stations[sta_id].sta.station_flags_msk = 0;
1114         priv->stations[sta_id].sta.sta.modify_mask = STA_MODIFY_DELBA_TID_MSK;
1115         priv->stations[sta_id].sta.remove_immediate_ba_tid = (u8)tid;
1116         priv->stations[sta_id].sta.mode = STA_CONTROL_MODIFY_MSK;
1117         spin_unlock_irqrestore(&priv->sta_lock, flags);
1118
1119         return iwl_send_add_sta(priv, &priv->stations[sta_id].sta,
1120                                         CMD_ASYNC);
1121 }
1122 EXPORT_SYMBOL(iwl_sta_rx_agg_stop);
1123
1124 static void iwl_sta_modify_ps_wake(struct iwl_priv *priv, int sta_id)
1125 {
1126         unsigned long flags;
1127
1128         spin_lock_irqsave(&priv->sta_lock, flags);
1129         priv->stations[sta_id].sta.station_flags &= ~STA_FLG_PWR_SAVE_MSK;
1130         priv->stations[sta_id].sta.station_flags_msk = STA_FLG_PWR_SAVE_MSK;
1131         priv->stations[sta_id].sta.sta.modify_mask = 0;
1132         priv->stations[sta_id].sta.mode = STA_CONTROL_MODIFY_MSK;
1133         spin_unlock_irqrestore(&priv->sta_lock, flags);
1134
1135         iwl_send_add_sta(priv, &priv->stations[sta_id].sta, CMD_ASYNC);
1136 }
1137
1138 void iwl_update_ps_mode(struct iwl_priv *priv, u16 ps_bit, u8 *addr)
1139 {
1140         /* FIXME: need locking over ps_status ??? */
1141         u8 sta_id = iwl_find_station(priv, addr);
1142
1143         if (sta_id != IWL_INVALID_STATION) {
1144                 u8 sta_awake = priv->stations[sta_id].
1145                                 ps_status == STA_PS_STATUS_WAKE;
1146
1147                 if (sta_awake && ps_bit)
1148                         priv->stations[sta_id].ps_status = STA_PS_STATUS_SLEEP;
1149                 else if (!sta_awake && !ps_bit) {
1150                         iwl_sta_modify_ps_wake(priv, sta_id);
1151                         priv->stations[sta_id].ps_status = STA_PS_STATUS_WAKE;
1152                 }
1153         }
1154 }
1155