git.oblomov.eu Git - linux-2.6/blob - 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 priv->cfg->ops->smgmt->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 = priv->cfg->ops->smgmt->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         int i;
 476
 477         spin_lock_irqsave(&priv->sta_lock, flags);
 478
 479         if (iwl_is_alive(priv) &&
 480            !test_bit(STATUS_EXIT_PENDING, &priv->status) &&
 481            iwl_send_cmd_pdu_async(priv, REPLY_REMOVE_ALL_STA, 0, NULL, NULL))
 482                 IWL_ERR(priv, "Couldn't clear the station table\n");
 483
 484         priv->num_stations = 0;
 485         memset(priv->stations, 0, sizeof(priv->stations));
 486
 487         /* clean ucode key table bit map */
 488         priv->ucode_key_table = 0;
 489
 490         /* keep track of static keys */
 491         for (i = 0; i < WEP_KEYS_MAX ; i++) {
 492                 if (priv->wep_keys[i].key_size)
 493                         test_and_set_bit(i, &priv->ucode_key_table);
 494         }
 495
 496         spin_unlock_irqrestore(&priv->sta_lock, flags);
 497 }
 498 EXPORT_SYMBOL(iwl_clear_stations_table);
 499
 500 int iwl_get_free_ucode_key_index(struct iwl_priv *priv)
 501 {
 502         int i;
 503
 504         for (i = 0; i < STA_KEY_MAX_NUM; i++)
 505                 if (!test_and_set_bit(i, &priv->ucode_key_table))
 506                         return i;
 507
 508         return WEP_INVALID_OFFSET;
 509 }
 510 EXPORT_SYMBOL(iwl_get_free_ucode_key_index);
 511
 512 int iwl_send_static_wepkey_cmd(struct iwl_priv *priv, u8 send_if_empty)
 513 {
 514         int i, not_empty = 0;
 515         u8 buff[sizeof(struct iwl_wep_cmd) +
 516                 sizeof(struct iwl_wep_key) * WEP_KEYS_MAX];
 517         struct iwl_wep_cmd *wep_cmd = (struct iwl_wep_cmd *)buff;
 518         size_t cmd_size  = sizeof(struct iwl_wep_cmd);
 519         struct iwl_host_cmd cmd = {
 520                 .id = REPLY_WEPKEY,
 521                 .data = wep_cmd,
 522                 .meta.flags = CMD_ASYNC,
 523         };
 524
 525         memset(wep_cmd, 0, cmd_size +
 526                         (sizeof(struct iwl_wep_key) * WEP_KEYS_MAX));
 527
 528         for (i = 0; i < WEP_KEYS_MAX ; i++) {
 529                 wep_cmd->key[i].key_index = i;
 530                 if (priv->wep_keys[i].key_size) {
 531                         wep_cmd->key[i].key_offset = i;
 532                         not_empty = 1;
 533                 } else {
 534                         wep_cmd->key[i].key_offset = WEP_INVALID_OFFSET;
 535                 }
 536
 537                 wep_cmd->key[i].key_size = priv->wep_keys[i].key_size;
 538                 memcpy(&wep_cmd->key[i].key[3], priv->wep_keys[i].key,
 539                                 priv->wep_keys[i].key_size);
 540         }
 541
 542         wep_cmd->global_key_type = WEP_KEY_WEP_TYPE;
 543         wep_cmd->num_keys = WEP_KEYS_MAX;
 544
 545         cmd_size += sizeof(struct iwl_wep_key) * WEP_KEYS_MAX;
 546
 547         cmd.len = cmd_size;
 548
 549         if (not_empty || send_if_empty)
 550                 return iwl_send_cmd(priv, &cmd);
 551         else
 552                 return 0;
 553 }
 554 EXPORT_SYMBOL(iwl_send_static_wepkey_cmd);
 555
 556 int iwl_remove_default_wep_key(struct iwl_priv *priv,
 557                                struct ieee80211_key_conf *keyconf)
 558 {
 559         int ret;
 560         unsigned long flags;
 561
 562         spin_lock_irqsave(&priv->sta_lock, flags);
 563
 564         if (!test_and_clear_bit(keyconf->keyidx, &priv->ucode_key_table))
 565                 IWL_ERR(priv, "index %d not used in uCode key table.\n",
 566                           keyconf->keyidx);
 567
 568         priv->default_wep_key--;
 569         memset(&priv->wep_keys[keyconf->keyidx], 0, sizeof(priv->wep_keys[0]));
 570         ret = iwl_send_static_wepkey_cmd(priv, 1);
 571         IWL_DEBUG_WEP(priv, "Remove default WEP key: idx=%d ret=%d\n",
 572                       keyconf->keyidx, ret);
 573         spin_unlock_irqrestore(&priv->sta_lock, flags);
 574
 575         return ret;
 576 }
 577 EXPORT_SYMBOL(iwl_remove_default_wep_key);
 578
 579 int iwl_set_default_wep_key(struct iwl_priv *priv,
 580                             struct ieee80211_key_conf *keyconf)
 581 {
 582         int ret;
 583         unsigned long flags;
 584
 585         if (keyconf->keylen != WEP_KEY_LEN_128 &&
 586             keyconf->keylen != WEP_KEY_LEN_64) {
 587                 IWL_DEBUG_WEP(priv, "Bad WEP key length %d\n", keyconf->keylen);
 588                 return -EINVAL;
 589         }
 590
 591         keyconf->flags &= ~IEEE80211_KEY_FLAG_GENERATE_IV;
 592         keyconf->hw_key_idx = HW_KEY_DEFAULT;
 593         priv->stations[IWL_AP_ID].keyinfo.alg = ALG_WEP;
 594
 595         spin_lock_irqsave(&priv->sta_lock, flags);
 596         priv->default_wep_key++;
 597
 598         if (test_and_set_bit(keyconf->keyidx, &priv->ucode_key_table))
 599                 IWL_ERR(priv, "index %d already used in uCode key table.\n",
 600                         keyconf->keyidx);
 601
 602         priv->wep_keys[keyconf->keyidx].key_size = keyconf->keylen;
 603         memcpy(&priv->wep_keys[keyconf->keyidx].key, &keyconf->key,
 604                                                         keyconf->keylen);
 605
 606         ret = iwl_send_static_wepkey_cmd(priv, 0);
 607         IWL_DEBUG_WEP(priv, "Set default WEP key: len=%d idx=%d ret=%d\n",
 608                 keyconf->keylen, keyconf->keyidx, ret);
 609         spin_unlock_irqrestore(&priv->sta_lock, flags);
 610
 611         return ret;
 612 }
 613 EXPORT_SYMBOL(iwl_set_default_wep_key);
 614
 615 static int iwl_set_wep_dynamic_key_info(struct iwl_priv *priv,
 616                                 struct ieee80211_key_conf *keyconf,
 617                                 u8 sta_id)
 618 {
 619         unsigned long flags;
 620         __le16 key_flags = 0;
 621         int ret;
 622
 623         keyconf->flags &= ~IEEE80211_KEY_FLAG_GENERATE_IV;
 624
 625         key_flags |= (STA_KEY_FLG_WEP | STA_KEY_FLG_MAP_KEY_MSK);
 626         key_flags |= cpu_to_le16(keyconf->keyidx << STA_KEY_FLG_KEYID_POS);
 627         key_flags &= ~STA_KEY_FLG_INVALID;
 628
 629         if (keyconf->keylen == WEP_KEY_LEN_128)
 630                 key_flags |= STA_KEY_FLG_KEY_SIZE_MSK;
 631
 632         if (sta_id == priv->hw_params.bcast_sta_id)
 633                 key_flags |= STA_KEY_MULTICAST_MSK;
 634
 635         spin_lock_irqsave(&priv->sta_lock, flags);
 636
 637         priv->stations[sta_id].keyinfo.alg = keyconf->alg;
 638         priv->stations[sta_id].keyinfo.keylen = keyconf->keylen;
 639         priv->stations[sta_id].keyinfo.keyidx = keyconf->keyidx;
 640
 641         memcpy(priv->stations[sta_id].keyinfo.key,
 642                                 keyconf->key, keyconf->keylen);
 643
 644         memcpy(&priv->stations[sta_id].sta.key.key[3],
 645                                 keyconf->key, keyconf->keylen);
 646
 647         if ((priv->stations[sta_id].sta.key.key_flags & STA_KEY_FLG_ENCRYPT_MSK)
 648                         == STA_KEY_FLG_NO_ENC)
 649                 priv->stations[sta_id].sta.key.key_offset =
 650                                  iwl_get_free_ucode_key_index(priv);
 651         /* else, we are overriding an existing key => no need to allocated room
 652          * in uCode. */
 653
 654         WARN(priv->stations[sta_id].sta.key.key_offset == WEP_INVALID_OFFSET,
 655                 "no space for a new key");
 656
 657         priv->stations[sta_id].sta.key.key_flags = key_flags;
 658         priv->stations[sta_id].sta.sta.modify_mask = STA_MODIFY_KEY_MASK;
 659         priv->stations[sta_id].sta.mode = STA_CONTROL_MODIFY_MSK;
 660
 661         ret = iwl_send_add_sta(priv, &priv->stations[sta_id].sta, CMD_ASYNC);
 662
 663         spin_unlock_irqrestore(&priv->sta_lock, flags);
 664
 665         return ret;
 666 }
 667
 668 static int iwl_set_ccmp_dynamic_key_info(struct iwl_priv *priv,
 669                                    struct ieee80211_key_conf *keyconf,
 670                                    u8 sta_id)
 671 {
 672         unsigned long flags;
 673         __le16 key_flags = 0;
 674         int ret;
 675
 676         key_flags |= (STA_KEY_FLG_CCMP | STA_KEY_FLG_MAP_KEY_MSK);
 677         key_flags |= cpu_to_le16(keyconf->keyidx << STA_KEY_FLG_KEYID_POS);
 678         key_flags &= ~STA_KEY_FLG_INVALID;
 679
 680         if (sta_id == priv->hw_params.bcast_sta_id)
 681                 key_flags |= STA_KEY_MULTICAST_MSK;
 682
 683         keyconf->flags |= IEEE80211_KEY_FLAG_GENERATE_IV;
 684
 685         spin_lock_irqsave(&priv->sta_lock, flags);
 686         priv->stations[sta_id].keyinfo.alg = keyconf->alg;
 687         priv->stations[sta_id].keyinfo.keylen = keyconf->keylen;
 688
 689         memcpy(priv->stations[sta_id].keyinfo.key, keyconf->key,
 690                keyconf->keylen);
 691
 692         memcpy(priv->stations[sta_id].sta.key.key, keyconf->key,
 693                keyconf->keylen);
 694
 695         if ((priv->stations[sta_id].sta.key.key_flags & STA_KEY_FLG_ENCRYPT_MSK)
 696                         == STA_KEY_FLG_NO_ENC)
 697                 priv->stations[sta_id].sta.key.key_offset =
 698                                  iwl_get_free_ucode_key_index(priv);
 699         /* else, we are overriding an existing key => no need to allocated room
 700          * in uCode. */
 701
 702         WARN(priv->stations[sta_id].sta.key.key_offset == WEP_INVALID_OFFSET,
 703                 "no space for a new key");
 704
 705         priv->stations[sta_id].sta.key.key_flags = key_flags;
 706         priv->stations[sta_id].sta.sta.modify_mask = STA_MODIFY_KEY_MASK;
 707         priv->stations[sta_id].sta.mode = STA_CONTROL_MODIFY_MSK;
 708
 709         ret = iwl_send_add_sta(priv, &priv->stations[sta_id].sta, CMD_ASYNC);
 710
 711         spin_unlock_irqrestore(&priv->sta_lock, flags);
 712
 713         return ret;
 714 }
 715
 716 static int iwl_set_tkip_dynamic_key_info(struct iwl_priv *priv,
 717                                    struct ieee80211_key_conf *keyconf,
 718                                    u8 sta_id)
 719 {
 720         unsigned long flags;
 721         int ret = 0;
 722
 723         keyconf->flags |= IEEE80211_KEY_FLAG_GENERATE_IV;
 724         keyconf->flags |= IEEE80211_KEY_FLAG_GENERATE_MMIC;
 725
 726         spin_lock_irqsave(&priv->sta_lock, flags);
 727
 728         priv->stations[sta_id].keyinfo.alg = keyconf->alg;
 729         priv->stations[sta_id].keyinfo.keylen = 16;
 730
 731         if ((priv->stations[sta_id].sta.key.key_flags & STA_KEY_FLG_ENCRYPT_MSK)
 732                         == STA_KEY_FLG_NO_ENC)
 733                 priv->stations[sta_id].sta.key.key_offset =
 734                                  iwl_get_free_ucode_key_index(priv);
 735         /* else, we are overriding an existing key => no need to allocated room
 736          * in uCode. */
 737
 738         WARN(priv->stations[sta_id].sta.key.key_offset == WEP_INVALID_OFFSET,
 739                 "no space for a new key");
 740
 741         /* This copy is acutally not needed: we get the key with each TX */
 742         memcpy(priv->stations[sta_id].keyinfo.key, keyconf->key, 16);
 743
 744         memcpy(priv->stations[sta_id].sta.key.key, keyconf->key, 16);
 745
 746         spin_unlock_irqrestore(&priv->sta_lock, flags);
 747
 748         return ret;
 749 }
 750
 751 void iwl_update_tkip_key(struct iwl_priv *priv,
 752                         struct ieee80211_key_conf *keyconf,
 753                         const u8 *addr, u32 iv32, u16 *phase1key)
 754 {
 755         u8 sta_id = IWL_INVALID_STATION;
 756         unsigned long flags;
 757         __le16 key_flags = 0;
 758         int i;
 759         DECLARE_MAC_BUF(mac);
 760
 761         sta_id = priv->cfg->ops->smgmt->find_station(priv, addr);
 762         if (sta_id == IWL_INVALID_STATION) {
 763                 IWL_DEBUG_MAC80211(priv, "leave - %pM not in station map.\n",
 764                                    addr);
 765                 return;
 766         }
 767
 768         if (iwl_scan_cancel(priv)) {
 769                 /* cancel scan failed, just live w/ bad key and rely
 770                    briefly on SW decryption */
 771                 return;
 772         }
 773
 774         key_flags |= (STA_KEY_FLG_TKIP | STA_KEY_FLG_MAP_KEY_MSK);
 775         key_flags |= cpu_to_le16(keyconf->keyidx << STA_KEY_FLG_KEYID_POS);
 776         key_flags &= ~STA_KEY_FLG_INVALID;
 777
 778         if (sta_id == priv->hw_params.bcast_sta_id)
 779                 key_flags |= STA_KEY_MULTICAST_MSK;
 780
 781         spin_lock_irqsave(&priv->sta_lock, flags);
 782
 783         priv->stations[sta_id].sta.key.key_flags = key_flags;
 784         priv->stations[sta_id].sta.key.tkip_rx_tsc_byte2 = (u8) iv32;
 785
 786         for (i = 0; i < 5; i++)
 787                 priv->stations[sta_id].sta.key.tkip_rx_ttak[i] =
 788                         cpu_to_le16(phase1key[i]);
 789
 790         priv->stations[sta_id].sta.sta.modify_mask = STA_MODIFY_KEY_MASK;
 791         priv->stations[sta_id].sta.mode = STA_CONTROL_MODIFY_MSK;
 792
 793         iwl_send_add_sta(priv, &priv->stations[sta_id].sta, CMD_ASYNC);
 794
 795         spin_unlock_irqrestore(&priv->sta_lock, flags);
 796
 797 }
 798 EXPORT_SYMBOL(iwl_update_tkip_key);
 799
 800 int iwl_remove_dynamic_key(struct iwl_priv *priv,
 801                                 struct ieee80211_key_conf *keyconf,
 802                                 u8 sta_id)
 803 {
 804         unsigned long flags;
 805         int ret = 0;
 806         u16 key_flags;
 807         u8 keyidx;
 808
 809         priv->key_mapping_key--;
 810
 811         spin_lock_irqsave(&priv->sta_lock, flags);
 812         key_flags = le16_to_cpu(priv->stations[sta_id].sta.key.key_flags);
 813         keyidx = (key_flags >> STA_KEY_FLG_KEYID_POS) & 0x3;
 814
 815         IWL_DEBUG_WEP(priv, "Remove dynamic key: idx=%d sta=%d\n",
 816                       keyconf->keyidx, sta_id);
 817
 818         if (keyconf->keyidx != keyidx) {
 819                 /* We need to remove a key with index different that the one
 820                  * in the uCode. This means that the key we need to remove has
 821                  * been replaced by another one with different index.
 822                  * Don't do anything and return ok
 823                  */
 824                 spin_unlock_irqrestore(&priv->sta_lock, flags);
 825                 return 0;
 826         }
 827
 828         if (priv->stations[sta_id].sta.key.key_offset == WEP_INVALID_OFFSET) {
 829                 IWL_WARN(priv, "Removing wrong key %d 0x%x\n",
 830                             keyconf->keyidx, key_flags);
 831                 spin_unlock_irqrestore(&priv->sta_lock, flags);
 832                 return 0;
 833         }
 834
 835         if (!test_and_clear_bit(priv->stations[sta_id].sta.key.key_offset,
 836                 &priv->ucode_key_table))
 837                 IWL_ERR(priv, "index %d not used in uCode key table.\n",
 838                         priv->stations[sta_id].sta.key.key_offset);
 839         memset(&priv->stations[sta_id].keyinfo, 0,
 840                                         sizeof(struct iwl_hw_key));
 841         memset(&priv->stations[sta_id].sta.key, 0,
 842                                         sizeof(struct iwl4965_keyinfo));
 843         priv->stations[sta_id].sta.key.key_flags =
 844                         STA_KEY_FLG_NO_ENC | STA_KEY_FLG_INVALID;
 845         priv->stations[sta_id].sta.key.key_offset = WEP_INVALID_OFFSET;
 846         priv->stations[sta_id].sta.sta.modify_mask = STA_MODIFY_KEY_MASK;
 847         priv->stations[sta_id].sta.mode = STA_CONTROL_MODIFY_MSK;
 848
 849         ret =  iwl_send_add_sta(priv, &priv->stations[sta_id].sta, CMD_ASYNC);
 850         spin_unlock_irqrestore(&priv->sta_lock, flags);
 851         return ret;
 852 }
 853 EXPORT_SYMBOL(iwl_remove_dynamic_key);
 854
 855 int iwl_set_dynamic_key(struct iwl_priv *priv,
 856                                 struct ieee80211_key_conf *keyconf, u8 sta_id)
 857 {
 858         int ret;
 859
 860         priv->key_mapping_key++;
 861         keyconf->hw_key_idx = HW_KEY_DYNAMIC;
 862
 863         switch (keyconf->alg) {
 864         case ALG_CCMP:
 865                 ret = iwl_set_ccmp_dynamic_key_info(priv, keyconf, sta_id);
 866                 break;
 867         case ALG_TKIP:
 868                 ret = iwl_set_tkip_dynamic_key_info(priv, keyconf, sta_id);
 869                 break;
 870         case ALG_WEP:
 871                 ret = iwl_set_wep_dynamic_key_info(priv, keyconf, sta_id);
 872                 break;
 873         default:
 874                 IWL_ERR(priv,
 875                         "Unknown alg: %s alg = %d\n", __func__, keyconf->alg);
 876                 ret = -EINVAL;
 877         }
 878
 879         IWL_DEBUG_WEP(priv, "Set dynamic key: alg= %d len=%d idx=%d sta=%d ret=%d\n",
 880                       keyconf->alg, keyconf->keylen, keyconf->keyidx,
 881                       sta_id, ret);
 882
 883         return ret;
 884 }
 885 EXPORT_SYMBOL(iwl_set_dynamic_key);
 886
 887 #ifdef CONFIG_IWLWIFI_DEBUG
 888 static void iwl_dump_lq_cmd(struct iwl_priv *priv,
 889                            struct iwl_link_quality_cmd *lq)
 890 {
 891         int i;
 892         IWL_DEBUG_RATE(priv, "lq station id 0x%x\n", lq->sta_id);
 893         IWL_DEBUG_RATE(priv, "lq ant 0x%X 0x%X\n",
 894                        lq->general_params.single_stream_ant_msk,
 895                        lq->general_params.dual_stream_ant_msk);
 896
 897         for (i = 0; i < LINK_QUAL_MAX_RETRY_NUM; i++)
 898                 IWL_DEBUG_RATE(priv, "lq index %d 0x%X\n",
 899                                i, lq->rs_table[i].rate_n_flags);
 900 }
 901 #else
 902 static inline void iwl_dump_lq_cmd(struct iwl_priv *priv,
 903                                    struct iwl_link_quality_cmd *lq)
 904 {
 905 }
 906 #endif
 907
 908 int iwl_send_lq_cmd(struct iwl_priv *priv,
 909                     struct iwl_link_quality_cmd *lq, u8 flags)
 910 {
 911         struct iwl_host_cmd cmd = {
 912                 .id = REPLY_TX_LINK_QUALITY_CMD,
 913                 .len = sizeof(struct iwl_link_quality_cmd),
 914                 .meta.flags = flags,
 915                 .data = lq,
 916         };
 917
 918         if ((lq->sta_id == 0xFF) &&
 919             (priv->iw_mode == NL80211_IFTYPE_ADHOC))
 920                 return -EINVAL;
 921
 922         if (lq->sta_id == 0xFF)
 923                 lq->sta_id = IWL_AP_ID;
 924
 925         iwl_dump_lq_cmd(priv, lq);
 926
 927         if (iwl_is_associated(priv) && priv->assoc_station_added)
 928                 return  iwl_send_cmd(priv, &cmd);
 929
 930         return 0;
 931 }
 932 EXPORT_SYMBOL(iwl_send_lq_cmd);
 933
 934 /**
 935  * iwl_sta_init_lq - Initialize a station's hardware rate table
 936  *
 937  * The uCode's station table contains a table of fallback rates
 938  * for automatic fallback during transmission.
 939  *
 940  * NOTE: This sets up a default set of values.  These will be replaced later
 941  *       if the driver's iwl-agn-rs rate scaling algorithm is used, instead of
 942  *       rc80211_simple.
 943  *
 944  * NOTE: Run REPLY_ADD_STA command to set up station table entry, before
 945  *       calling this function (which runs REPLY_TX_LINK_QUALITY_CMD,
 946  *       which requires station table entry to exist).
 947  */
 948 static void iwl_sta_init_lq(struct iwl_priv *priv, const u8 *addr, int is_ap)
 949 {
 950         int i, r;
 951         struct iwl_link_quality_cmd link_cmd = {
 952                 .reserved1 = 0,
 953         };
 954         u32 rate_flags;
 955
 956         /* Set up the rate scaling to start at selected rate, fall back
 957          * all the way down to 1M in IEEE order, and then spin on 1M */
 958         if (is_ap)
 959                 r = IWL_RATE_54M_INDEX;
 960         else if (priv->band == IEEE80211_BAND_5GHZ)
 961                 r = IWL_RATE_6M_INDEX;
 962         else
 963                 r = IWL_RATE_1M_INDEX;
 964
 965         for (i = 0; i < LINK_QUAL_MAX_RETRY_NUM; i++) {
 966                 rate_flags = 0;
 967                 if (r >= IWL_FIRST_CCK_RATE && r <= IWL_LAST_CCK_RATE)
 968                         rate_flags |= RATE_MCS_CCK_MSK;
 969
 970                 rate_flags |= first_antenna(priv->hw_params.valid_tx_ant) <<
 971                                 RATE_MCS_ANT_POS;
 972
 973                 link_cmd.rs_table[i].rate_n_flags =
 974                         iwl_hw_set_rate_n_flags(iwl_rates[r].plcp, rate_flags);
 975                 r = iwl_get_prev_ieee_rate(r);
 976         }
 977
 978         link_cmd.general_params.single_stream_ant_msk =
 979                                 first_antenna(priv->hw_params.valid_tx_ant);
 980         link_cmd.general_params.dual_stream_ant_msk = 3;
 981         link_cmd.agg_params.agg_dis_start_th = 3;
 982         link_cmd.agg_params.agg_time_limit = cpu_to_le16(4000);
 983
 984         /* Update the rate scaling for control frame Tx to AP */
 985         link_cmd.sta_id = is_ap ? IWL_AP_ID : priv->hw_params.bcast_sta_id;
 986
 987         iwl_send_cmd_pdu_async(priv, REPLY_TX_LINK_QUALITY_CMD,
 988                                sizeof(link_cmd), &link_cmd, NULL);
 989 }
 990
 991 /**
 992  * iwl_rxon_add_station - add station into station table.
 993  *
 994  * there is only one AP station with id= IWL_AP_ID
 995  * NOTE: mutex must be held before calling this function
 996  */
 997 int iwl_rxon_add_station(struct iwl_priv *priv, const u8 *addr, int is_ap)
 998 {
 999         struct ieee80211_sta *sta;
1000         struct ieee80211_sta_ht_cap ht_config;
1001         struct ieee80211_sta_ht_cap *cur_ht_config = NULL;
1002         u8 sta_id;
1003
1004         /* Add station to device's station table */
1005
1006         /*
1007          * XXX: This check is definitely not correct, if we're an AP
1008          *      it'll always be false which is not what we want, but
1009          *      it doesn't look like iwlagn is prepared to be an HT
1010          *      AP anyway.
1011          */
1012         if (priv->current_ht_config.is_ht) {
1013                 rcu_read_lock();
1014                 sta = ieee80211_find_sta(priv->hw, addr);
1015                 if (sta) {
1016                         memcpy(&ht_config, &sta->ht_cap, sizeof(ht_config));
1017                         cur_ht_config = &ht_config;
1018                 }
1019                 rcu_read_unlock();
1020         }
1021
1022         sta_id = priv->cfg->ops->smgmt->add_station(priv, addr, is_ap,
1023                                        0, cur_ht_config);
1024
1025         /* Set up default rate scaling table in device's station table */
1026         iwl_sta_init_lq(priv, addr, is_ap);
1027
1028         return sta_id;
1029 }
1030 EXPORT_SYMBOL(iwl_rxon_add_station);
1031
1032 /**
1033  * iwl_get_sta_id - Find station's index within station table
1034  *
1035  * If new IBSS station, create new entry in station table
1036  */
1037 int iwl_get_sta_id(struct iwl_priv *priv, struct ieee80211_hdr *hdr)
1038 {
1039         int sta_id;
1040         u16 fc = le16_to_cpu(hdr->frame_control);
1041
1042         /* If this frame is broadcast or management, use broadcast station id */
1043         if (((fc & IEEE80211_FCTL_FTYPE) != IEEE80211_FTYPE_DATA) ||
1044             is_multicast_ether_addr(hdr->addr1))
1045                 return priv->hw_params.bcast_sta_id;
1046
1047         switch (priv->iw_mode) {
1048
1049         /* If we are a client station in a BSS network, use the special
1050          * AP station entry (that's the only station we communicate with) */
1051         case NL80211_IFTYPE_STATION:
1052                 return IWL_AP_ID;
1053
1054         /* If we are an AP, then find the station, or use BCAST */
1055         case NL80211_IFTYPE_AP:
1056                 sta_id = priv->cfg->ops->smgmt->find_station(priv, hdr->addr1);
1057                 if (sta_id != IWL_INVALID_STATION)
1058                         return sta_id;
1059                 return priv->hw_params.bcast_sta_id;
1060
1061         /* If this frame is going out to an IBSS network, find the station,
1062          * or create a new station table entry */
1063         case NL80211_IFTYPE_ADHOC:
1064                 sta_id = priv->cfg->ops->smgmt->find_station(priv, hdr->addr1);
1065                 if (sta_id != IWL_INVALID_STATION)
1066                         return sta_id;
1067
1068                 /* Create new station table entry */
1069                 sta_id = priv->cfg->ops->smgmt->add_station(priv, hdr->addr1,
1070                                                    0, CMD_ASYNC, NULL);
1071
1072                 if (sta_id != IWL_INVALID_STATION)
1073                         return sta_id;
1074
1075                 IWL_DEBUG_DROP(priv, "Station %pM not in station map. "
1076                                "Defaulting to broadcast...\n",
1077                                hdr->addr1);
1078                 iwl_print_hex_dump(priv, IWL_DL_DROP, (u8 *) hdr, sizeof(*hdr));
1079                 return priv->hw_params.bcast_sta_id;
1080
1081         default:
1082                 IWL_WARN(priv, "Unknown mode of operation: %d\n",
1083                         priv->iw_mode);
1084                 return priv->hw_params.bcast_sta_id;
1085         }
1086 }
1087 EXPORT_SYMBOL(iwl_get_sta_id);
1088
1089 /**
1090  * iwl_sta_tx_modify_enable_tid - Enable Tx for this TID in station table
1091  */
1092 void iwl_sta_tx_modify_enable_tid(struct iwl_priv *priv, int sta_id, int tid)
1093 {
1094         unsigned long flags;
1095
1096         /* Remove "disable" flag, to enable Tx for this TID */
1097         spin_lock_irqsave(&priv->sta_lock, flags);
1098         priv->stations[sta_id].sta.sta.modify_mask = STA_MODIFY_TID_DISABLE_TX;
1099         priv->stations[sta_id].sta.tid_disable_tx &= cpu_to_le16(~(1 << tid));
1100         priv->stations[sta_id].sta.mode = STA_CONTROL_MODIFY_MSK;
1101         spin_unlock_irqrestore(&priv->sta_lock, flags);
1102
1103         iwl_send_add_sta(priv, &priv->stations[sta_id].sta, CMD_ASYNC);
1104 }
1105 EXPORT_SYMBOL(iwl_sta_tx_modify_enable_tid);
1106
1107 int iwl_sta_rx_agg_start(struct iwl_priv *priv,
1108                          const u8 *addr, int tid, u16 ssn)
1109 {
1110         unsigned long flags;
1111         int sta_id;
1112
1113         sta_id = priv->cfg->ops->smgmt->find_station(priv, addr);
1114         if (sta_id == IWL_INVALID_STATION)
1115                 return -ENXIO;
1116
1117         spin_lock_irqsave(&priv->sta_lock, flags);
1118         priv->stations[sta_id].sta.station_flags_msk = 0;
1119         priv->stations[sta_id].sta.sta.modify_mask = STA_MODIFY_ADDBA_TID_MSK;
1120         priv->stations[sta_id].sta.add_immediate_ba_tid = (u8)tid;
1121         priv->stations[sta_id].sta.add_immediate_ba_ssn = cpu_to_le16(ssn);
1122         priv->stations[sta_id].sta.mode = STA_CONTROL_MODIFY_MSK;
1123         spin_unlock_irqrestore(&priv->sta_lock, flags);
1124
1125         return iwl_send_add_sta(priv, &priv->stations[sta_id].sta,
1126                                         CMD_ASYNC);
1127 }
1128 EXPORT_SYMBOL(iwl_sta_rx_agg_start);
1129
1130 int iwl_sta_rx_agg_stop(struct iwl_priv *priv, const u8 *addr, int tid)
1131 {
1132         unsigned long flags;
1133         int sta_id;
1134
1135         sta_id = priv->cfg->ops->smgmt->find_station(priv, addr);
1136         if (sta_id == IWL_INVALID_STATION) {
1137                 IWL_ERR(priv, "Invalid station for AGG tid %d\n", tid);
1138                 return -ENXIO;
1139         }
1140
1141         spin_lock_irqsave(&priv->sta_lock, flags);
1142         priv->stations[sta_id].sta.station_flags_msk = 0;
1143         priv->stations[sta_id].sta.sta.modify_mask = STA_MODIFY_DELBA_TID_MSK;
1144         priv->stations[sta_id].sta.remove_immediate_ba_tid = (u8)tid;
1145         priv->stations[sta_id].sta.mode = STA_CONTROL_MODIFY_MSK;
1146         spin_unlock_irqrestore(&priv->sta_lock, flags);
1147
1148         return iwl_send_add_sta(priv, &priv->stations[sta_id].sta,
1149                                         CMD_ASYNC);
1150 }
1151 EXPORT_SYMBOL(iwl_sta_rx_agg_stop);
1152
1153 static void iwl_sta_modify_ps_wake(struct iwl_priv *priv, int sta_id)
1154 {
1155         unsigned long flags;
1156
1157         spin_lock_irqsave(&priv->sta_lock, flags);
1158         priv->stations[sta_id].sta.station_flags &= ~STA_FLG_PWR_SAVE_MSK;
1159         priv->stations[sta_id].sta.station_flags_msk = STA_FLG_PWR_SAVE_MSK;
1160         priv->stations[sta_id].sta.sta.modify_mask = 0;
1161         priv->stations[sta_id].sta.mode = STA_CONTROL_MODIFY_MSK;
1162         spin_unlock_irqrestore(&priv->sta_lock, flags);
1163
1164         iwl_send_add_sta(priv, &priv->stations[sta_id].sta, CMD_ASYNC);
1165 }
1166
1167 void iwl_update_ps_mode(struct iwl_priv *priv, u16 ps_bit, u8 *addr)
1168 {
1169         /* FIXME: need locking over ps_status ??? */
1170         u8 sta_id = priv->cfg->ops->smgmt->find_station(priv, addr);
1171
1172         if (sta_id != IWL_INVALID_STATION) {
1173                 u8 sta_awake = priv->stations[sta_id].
1174                                 ps_status == STA_PS_STATUS_WAKE;
1175
1176                 if (sta_awake && ps_bit)
1177                         priv->stations[sta_id].ps_status = STA_PS_STATUS_SLEEP;
1178                 else if (!sta_awake && !ps_bit) {
1179                         iwl_sta_modify_ps_wake(priv, sta_id);
1180                         priv->stations[sta_id].ps_status = STA_PS_STATUS_WAKE;
1181                 }
1182         }
1183 }
1184