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("can not find STA %pM total %d\n",
  64                               addr, priv->num_stations);
  65
  66  out:
  67         spin_unlock_irqrestore(&priv->sta_lock, flags);
  68         return ret;
  69 }
  70 EXPORT_SYMBOL(iwl_find_station);
  71
  72 int iwl_get_ra_sta_id(struct iwl_priv *priv, struct ieee80211_hdr *hdr)
  73 {
  74         if (priv->iw_mode == NL80211_IFTYPE_STATION) {
  75                 return IWL_AP_ID;
  76         } else {
  77                 u8 *da = ieee80211_get_DA(hdr);
  78                 return iwl_find_station(priv, da);
  79         }
  80 }
  81 EXPORT_SYMBOL(iwl_get_ra_sta_id);
  82
  83 static void iwl_sta_ucode_activate(struct iwl_priv *priv, u8 sta_id)
  84 {
  85         unsigned long flags;
  86
  87         spin_lock_irqsave(&priv->sta_lock, flags);
  88
  89         if (!(priv->stations[sta_id].used & IWL_STA_DRIVER_ACTIVE) &&
  90             !(priv->stations_39[sta_id].used & IWL_STA_DRIVER_ACTIVE))
  91                 IWL_ERR(priv, "ACTIVATE a non DRIVER active station %d\n",
  92                         sta_id);
  93
  94         priv->stations[sta_id].used |= IWL_STA_UCODE_ACTIVE;
  95         IWL_DEBUG_ASSOC("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("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("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("Add STA to driver ID %d: %pM\n",
 276                         sta_id, addr);
 277         priv->num_stations++;
 278
 279         /* Set up the REPLY_ADD_STA command to send to device */
 280         memset(&station->sta, 0, sizeof(struct iwl_addsta_cmd));
 281         memcpy(station->sta.sta.addr, addr, ETH_ALEN);
 282         station->sta.mode = 0;
 283         station->sta.sta.sta_id = sta_id;
 284         station->sta.station_flags = 0;
 285
 286         /* BCAST station and IBSS stations do not work in HT mode */
 287         if (sta_id != priv->hw_params.bcast_sta_id &&
 288             priv->iw_mode != NL80211_IFTYPE_ADHOC)
 289                 iwl_set_ht_add_station(priv, sta_id, ht_info);
 290
 291         spin_unlock_irqrestore(&priv->sta_lock, flags_spin);
 292
 293         /* Add station to device's station table */
 294         iwl_send_add_sta(priv, &station->sta, flags);
 295         return sta_id;
 296
 297 }
 298 EXPORT_SYMBOL(iwl_add_station_flags);
 299
 300 static void iwl_sta_ucode_deactivate(struct iwl_priv *priv, const char *addr)
 301 {
 302         unsigned long flags;
 303         u8 sta_id = iwl_find_station(priv, addr);
 304
 305         BUG_ON(sta_id == IWL_INVALID_STATION);
 306
 307         IWL_DEBUG_ASSOC("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("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("Removing STA from driver:%d  %pM\n",
 436                 sta_id, addr);
 437
 438         if (!(priv->stations[sta_id].used & IWL_STA_DRIVER_ACTIVE)) {
 439                 IWL_ERR(priv, "Removing %pM but non DRIVER active\n",
 440                                 addr);
 441                 goto out;
 442         }
 443
 444         if (!(priv->stations[sta_id].used & IWL_STA_UCODE_ACTIVE)) {
 445                 IWL_ERR(priv, "Removing %pM but non UCODE active\n",
 446                                 addr);
 447                 goto out;
 448         }
 449
 450
 451         priv->stations[sta_id].used &= ~IWL_STA_DRIVER_ACTIVE;
 452
 453         priv->num_stations--;
 454
 455         BUG_ON(priv->num_stations < 0);
 456
 457         spin_unlock_irqrestore(&priv->sta_lock, flags);
 458
 459         ret = iwl_send_remove_station(priv, addr, CMD_ASYNC);
 460         return ret;
 461 out:
 462         spin_unlock_irqrestore(&priv->sta_lock, flags);
 463         return ret;
 464 }
 465 EXPORT_SYMBOL(iwl_remove_station);
 466
 467 /**
 468  * iwl_clear_stations_table - Clear the driver's station table
 469  *
 470  * NOTE:  This does not clear or otherwise alter the device's station table.
 471  */
 472 void iwl_clear_stations_table(struct iwl_priv *priv)
 473 {
 474         unsigned long flags;
 475
 476         spin_lock_irqsave(&priv->sta_lock, flags);
 477
 478         if (iwl_is_alive(priv) &&
 479            !test_bit(STATUS_EXIT_PENDING, &priv->status) &&
 480            iwl_send_cmd_pdu_async(priv, REPLY_REMOVE_ALL_STA, 0, NULL, NULL))
 481                 IWL_ERR(priv, "Couldn't clear the station table\n");
 482
 483         priv->num_stations = 0;
 484         memset(priv->stations, 0, sizeof(priv->stations));
 485
 486         spin_unlock_irqrestore(&priv->sta_lock, flags);
 487 }
 488 EXPORT_SYMBOL(iwl_clear_stations_table);
 489
 490 static int iwl_get_free_ucode_key_index(struct iwl_priv *priv)
 491 {
 492         int i;
 493
 494         for (i = 0; i < STA_KEY_MAX_NUM; i++)
 495                 if (!test_and_set_bit(i, &priv->ucode_key_table))
 496                         return i;
 497
 498         return WEP_INVALID_OFFSET;
 499 }
 500
 501 int iwl_send_static_wepkey_cmd(struct iwl_priv *priv, u8 send_if_empty)
 502 {
 503         int i, not_empty = 0;
 504         u8 buff[sizeof(struct iwl_wep_cmd) +
 505                 sizeof(struct iwl_wep_key) * WEP_KEYS_MAX];
 506         struct iwl_wep_cmd *wep_cmd = (struct iwl_wep_cmd *)buff;
 507         size_t cmd_size  = sizeof(struct iwl_wep_cmd);
 508         struct iwl_host_cmd cmd = {
 509                 .id = REPLY_WEPKEY,
 510                 .data = wep_cmd,
 511                 .meta.flags = CMD_ASYNC,
 512         };
 513
 514         memset(wep_cmd, 0, cmd_size +
 515                         (sizeof(struct iwl_wep_key) * WEP_KEYS_MAX));
 516
 517         for (i = 0; i < WEP_KEYS_MAX ; i++) {
 518                 wep_cmd->key[i].key_index = i;
 519                 if (priv->wep_keys[i].key_size) {
 520                         wep_cmd->key[i].key_offset = i;
 521                         not_empty = 1;
 522                 } else {
 523                         wep_cmd->key[i].key_offset = WEP_INVALID_OFFSET;
 524                 }
 525
 526                 wep_cmd->key[i].key_size = priv->wep_keys[i].key_size;
 527                 memcpy(&wep_cmd->key[i].key[3], priv->wep_keys[i].key,
 528                                 priv->wep_keys[i].key_size);
 529         }
 530
 531         wep_cmd->global_key_type = WEP_KEY_WEP_TYPE;
 532         wep_cmd->num_keys = WEP_KEYS_MAX;
 533
 534         cmd_size += sizeof(struct iwl_wep_key) * WEP_KEYS_MAX;
 535
 536         cmd.len = cmd_size;
 537
 538         if (not_empty || send_if_empty)
 539                 return iwl_send_cmd(priv, &cmd);
 540         else
 541                 return 0;
 542 }
 543 EXPORT_SYMBOL(iwl_send_static_wepkey_cmd);
 544
 545 int iwl_remove_default_wep_key(struct iwl_priv *priv,
 546                                struct ieee80211_key_conf *keyconf)
 547 {
 548         int ret;
 549         unsigned long flags;
 550
 551         spin_lock_irqsave(&priv->sta_lock, flags);
 552
 553         if (!test_and_clear_bit(keyconf->keyidx, &priv->ucode_key_table))
 554                 IWL_ERR(priv, "index %d not used in uCode key table.\n",
 555                           keyconf->keyidx);
 556
 557         priv->default_wep_key--;
 558         memset(&priv->wep_keys[keyconf->keyidx], 0, sizeof(priv->wep_keys[0]));
 559         ret = iwl_send_static_wepkey_cmd(priv, 1);
 560         IWL_DEBUG_WEP("Remove default WEP key: idx=%d ret=%d\n",
 561                       keyconf->keyidx, ret);
 562         spin_unlock_irqrestore(&priv->sta_lock, flags);
 563
 564         return ret;
 565 }
 566 EXPORT_SYMBOL(iwl_remove_default_wep_key);
 567
 568 int iwl_set_default_wep_key(struct iwl_priv *priv,
 569                             struct ieee80211_key_conf *keyconf)
 570 {
 571         int ret;
 572         unsigned long flags;
 573
 574         if (keyconf->keylen != WEP_KEY_LEN_128 &&
 575             keyconf->keylen != WEP_KEY_LEN_64) {
 576                 IWL_DEBUG_WEP("Bad WEP key length %d\n", keyconf->keylen);
 577                 return -EINVAL;
 578         }
 579
 580         keyconf->flags &= ~IEEE80211_KEY_FLAG_GENERATE_IV;
 581         keyconf->hw_key_idx = HW_KEY_DEFAULT;
 582         priv->stations[IWL_AP_ID].keyinfo.alg = ALG_WEP;
 583
 584         spin_lock_irqsave(&priv->sta_lock, flags);
 585         priv->default_wep_key++;
 586
 587         if (test_and_set_bit(keyconf->keyidx, &priv->ucode_key_table))
 588                 IWL_ERR(priv, "index %d already used in uCode key table.\n",
 589                         keyconf->keyidx);
 590
 591         priv->wep_keys[keyconf->keyidx].key_size = keyconf->keylen;
 592         memcpy(&priv->wep_keys[keyconf->keyidx].key, &keyconf->key,
 593                                                         keyconf->keylen);
 594
 595         ret = iwl_send_static_wepkey_cmd(priv, 0);
 596         IWL_DEBUG_WEP("Set default WEP key: len=%d idx=%d ret=%d\n",
 597                 keyconf->keylen, keyconf->keyidx, ret);
 598         spin_unlock_irqrestore(&priv->sta_lock, flags);
 599
 600         return ret;
 601 }
 602 EXPORT_SYMBOL(iwl_set_default_wep_key);
 603
 604 static int iwl_set_wep_dynamic_key_info(struct iwl_priv *priv,
 605                                 struct ieee80211_key_conf *keyconf,
 606                                 u8 sta_id)
 607 {
 608         unsigned long flags;
 609         __le16 key_flags = 0;
 610         int ret;
 611
 612         keyconf->flags &= ~IEEE80211_KEY_FLAG_GENERATE_IV;
 613
 614         key_flags |= (STA_KEY_FLG_WEP | STA_KEY_FLG_MAP_KEY_MSK);
 615         key_flags |= cpu_to_le16(keyconf->keyidx << STA_KEY_FLG_KEYID_POS);
 616         key_flags &= ~STA_KEY_FLG_INVALID;
 617
 618         if (keyconf->keylen == WEP_KEY_LEN_128)
 619                 key_flags |= STA_KEY_FLG_KEY_SIZE_MSK;
 620
 621         if (sta_id == priv->hw_params.bcast_sta_id)
 622                 key_flags |= STA_KEY_MULTICAST_MSK;
 623
 624         spin_lock_irqsave(&priv->sta_lock, flags);
 625
 626         priv->stations[sta_id].keyinfo.alg = keyconf->alg;
 627         priv->stations[sta_id].keyinfo.keylen = keyconf->keylen;
 628         priv->stations[sta_id].keyinfo.keyidx = keyconf->keyidx;
 629
 630         memcpy(priv->stations[sta_id].keyinfo.key,
 631                                 keyconf->key, keyconf->keylen);
 632
 633         memcpy(&priv->stations[sta_id].sta.key.key[3],
 634                                 keyconf->key, keyconf->keylen);
 635
 636         if ((priv->stations[sta_id].sta.key.key_flags & STA_KEY_FLG_ENCRYPT_MSK)
 637                         == STA_KEY_FLG_NO_ENC)
 638                 priv->stations[sta_id].sta.key.key_offset =
 639                                  iwl_get_free_ucode_key_index(priv);
 640         /* else, we are overriding an existing key => no need to allocated room
 641          * in uCode. */
 642
 643         WARN(priv->stations[sta_id].sta.key.key_offset == WEP_INVALID_OFFSET,
 644                 "no space for a new key");
 645
 646         priv->stations[sta_id].sta.key.key_flags = key_flags;
 647         priv->stations[sta_id].sta.sta.modify_mask = STA_MODIFY_KEY_MASK;
 648         priv->stations[sta_id].sta.mode = STA_CONTROL_MODIFY_MSK;
 649
 650         ret = iwl_send_add_sta(priv, &priv->stations[sta_id].sta, CMD_ASYNC);
 651
 652         spin_unlock_irqrestore(&priv->sta_lock, flags);
 653
 654         return ret;
 655 }
 656
 657 static int iwl_set_ccmp_dynamic_key_info(struct iwl_priv *priv,
 658                                    struct ieee80211_key_conf *keyconf,
 659                                    u8 sta_id)
 660 {
 661         unsigned long flags;
 662         __le16 key_flags = 0;
 663         int ret;
 664
 665         key_flags |= (STA_KEY_FLG_CCMP | STA_KEY_FLG_MAP_KEY_MSK);
 666         key_flags |= cpu_to_le16(keyconf->keyidx << STA_KEY_FLG_KEYID_POS);
 667         key_flags &= ~STA_KEY_FLG_INVALID;
 668
 669         if (sta_id == priv->hw_params.bcast_sta_id)
 670                 key_flags |= STA_KEY_MULTICAST_MSK;
 671
 672         keyconf->flags |= IEEE80211_KEY_FLAG_GENERATE_IV;
 673
 674         spin_lock_irqsave(&priv->sta_lock, flags);
 675         priv->stations[sta_id].keyinfo.alg = keyconf->alg;
 676         priv->stations[sta_id].keyinfo.keylen = keyconf->keylen;
 677
 678         memcpy(priv->stations[sta_id].keyinfo.key, keyconf->key,
 679                keyconf->keylen);
 680
 681         memcpy(priv->stations[sta_id].sta.key.key, keyconf->key,
 682                keyconf->keylen);
 683
 684         if ((priv->stations[sta_id].sta.key.key_flags & STA_KEY_FLG_ENCRYPT_MSK)
 685                         == STA_KEY_FLG_NO_ENC)
 686                 priv->stations[sta_id].sta.key.key_offset =
 687                                  iwl_get_free_ucode_key_index(priv);
 688         /* else, we are overriding an existing key => no need to allocated room
 689          * in uCode. */
 690
 691         WARN(priv->stations[sta_id].sta.key.key_offset == WEP_INVALID_OFFSET,
 692                 "no space for a new key");
 693
 694         priv->stations[sta_id].sta.key.key_flags = key_flags;
 695         priv->stations[sta_id].sta.sta.modify_mask = STA_MODIFY_KEY_MASK;
 696         priv->stations[sta_id].sta.mode = STA_CONTROL_MODIFY_MSK;
 697
 698         ret = iwl_send_add_sta(priv, &priv->stations[sta_id].sta, CMD_ASYNC);
 699
 700         spin_unlock_irqrestore(&priv->sta_lock, flags);
 701
 702         return ret;
 703 }
 704
 705 static int iwl_set_tkip_dynamic_key_info(struct iwl_priv *priv,
 706                                    struct ieee80211_key_conf *keyconf,
 707                                    u8 sta_id)
 708 {
 709         unsigned long flags;
 710         int ret = 0;
 711
 712         keyconf->flags |= IEEE80211_KEY_FLAG_GENERATE_IV;
 713         keyconf->flags |= IEEE80211_KEY_FLAG_GENERATE_MMIC;
 714
 715         spin_lock_irqsave(&priv->sta_lock, flags);
 716
 717         priv->stations[sta_id].keyinfo.alg = keyconf->alg;
 718         priv->stations[sta_id].keyinfo.keylen = 16;
 719
 720         if ((priv->stations[sta_id].sta.key.key_flags & STA_KEY_FLG_ENCRYPT_MSK)
 721                         == STA_KEY_FLG_NO_ENC)
 722                 priv->stations[sta_id].sta.key.key_offset =
 723                                  iwl_get_free_ucode_key_index(priv);
 724         /* else, we are overriding an existing key => no need to allocated room
 725          * in uCode. */
 726
 727         WARN(priv->stations[sta_id].sta.key.key_offset == WEP_INVALID_OFFSET,
 728                 "no space for a new key");
 729
 730         /* This copy is acutally not needed: we get the key with each TX */
 731         memcpy(priv->stations[sta_id].keyinfo.key, keyconf->key, 16);
 732
 733         memcpy(priv->stations[sta_id].sta.key.key, keyconf->key, 16);
 734
 735         spin_unlock_irqrestore(&priv->sta_lock, flags);
 736
 737         return ret;
 738 }
 739
 740 void iwl_update_tkip_key(struct iwl_priv *priv,
 741                         struct ieee80211_key_conf *keyconf,
 742                         const u8 *addr, u32 iv32, u16 *phase1key)
 743 {
 744         u8 sta_id = IWL_INVALID_STATION;
 745         unsigned long flags;
 746         __le16 key_flags = 0;
 747         int i;
 748         DECLARE_MAC_BUF(mac);
 749
 750         sta_id = iwl_find_station(priv, addr);
 751         if (sta_id == IWL_INVALID_STATION) {
 752                 IWL_DEBUG_MAC80211("leave - %pM not in station map.\n",
 753                                    addr);
 754                 return;
 755         }
 756
 757         if (iwl_scan_cancel(priv)) {
 758                 /* cancel scan failed, just live w/ bad key and rely
 759                    briefly on SW decryption */
 760                 return;
 761         }
 762
 763         key_flags |= (STA_KEY_FLG_TKIP | STA_KEY_FLG_MAP_KEY_MSK);
 764         key_flags |= cpu_to_le16(keyconf->keyidx << STA_KEY_FLG_KEYID_POS);
 765         key_flags &= ~STA_KEY_FLG_INVALID;
 766
 767         if (sta_id == priv->hw_params.bcast_sta_id)
 768                 key_flags |= STA_KEY_MULTICAST_MSK;
 769
 770         spin_lock_irqsave(&priv->sta_lock, flags);
 771
 772         priv->stations[sta_id].sta.key.key_flags = key_flags;
 773         priv->stations[sta_id].sta.key.tkip_rx_tsc_byte2 = (u8) iv32;
 774
 775         for (i = 0; i < 5; i++)
 776                 priv->stations[sta_id].sta.key.tkip_rx_ttak[i] =
 777                         cpu_to_le16(phase1key[i]);
 778
 779         priv->stations[sta_id].sta.sta.modify_mask = STA_MODIFY_KEY_MASK;
 780         priv->stations[sta_id].sta.mode = STA_CONTROL_MODIFY_MSK;
 781
 782         iwl_send_add_sta(priv, &priv->stations[sta_id].sta, CMD_ASYNC);
 783
 784         spin_unlock_irqrestore(&priv->sta_lock, flags);
 785
 786 }
 787 EXPORT_SYMBOL(iwl_update_tkip_key);
 788
 789 int iwl_remove_dynamic_key(struct iwl_priv *priv,
 790                                 struct ieee80211_key_conf *keyconf,
 791                                 u8 sta_id)
 792 {
 793         unsigned long flags;
 794         int ret = 0;
 795         u16 key_flags;
 796         u8 keyidx;
 797
 798         priv->key_mapping_key--;
 799
 800         spin_lock_irqsave(&priv->sta_lock, flags);
 801         key_flags = le16_to_cpu(priv->stations[sta_id].sta.key.key_flags);
 802         keyidx = (key_flags >> STA_KEY_FLG_KEYID_POS) & 0x3;
 803
 804         IWL_DEBUG_WEP("Remove dynamic key: idx=%d sta=%d\n",
 805                       keyconf->keyidx, sta_id);
 806
 807         if (keyconf->keyidx != keyidx) {
 808                 /* We need to remove a key with index different that the one
 809                  * in the uCode. This means that the key we need to remove has
 810                  * been replaced by another one with different index.
 811                  * Don't do anything and return ok
 812                  */
 813                 spin_unlock_irqrestore(&priv->sta_lock, flags);
 814                 return 0;
 815         }
 816
 817         if (priv->stations[sta_id].sta.key.key_offset == WEP_INVALID_OFFSET) {
 818                 IWL_WARN(priv, "Removing wrong key %d 0x%x\n",
 819                             keyconf->keyidx, key_flags);
 820                 spin_unlock_irqrestore(&priv->sta_lock, flags);
 821                 return 0;
 822         }
 823
 824         if (!test_and_clear_bit(priv->stations[sta_id].sta.key.key_offset,
 825                 &priv->ucode_key_table))
 826                 IWL_ERR(priv, "index %d not used in uCode key table.\n",
 827                         priv->stations[sta_id].sta.key.key_offset);
 828         memset(&priv->stations[sta_id].keyinfo, 0,
 829                                         sizeof(struct iwl_hw_key));
 830         memset(&priv->stations[sta_id].sta.key, 0,
 831                                         sizeof(struct iwl4965_keyinfo));
 832         priv->stations[sta_id].sta.key.key_flags =
 833                         STA_KEY_FLG_NO_ENC | STA_KEY_FLG_INVALID;
 834         priv->stations[sta_id].sta.key.key_offset = WEP_INVALID_OFFSET;
 835         priv->stations[sta_id].sta.sta.modify_mask = STA_MODIFY_KEY_MASK;
 836         priv->stations[sta_id].sta.mode = STA_CONTROL_MODIFY_MSK;
 837
 838         ret =  iwl_send_add_sta(priv, &priv->stations[sta_id].sta, CMD_ASYNC);
 839         spin_unlock_irqrestore(&priv->sta_lock, flags);
 840         return ret;
 841 }
 842 EXPORT_SYMBOL(iwl_remove_dynamic_key);
 843
 844 int iwl_set_dynamic_key(struct iwl_priv *priv,
 845                                 struct ieee80211_key_conf *keyconf, u8 sta_id)
 846 {
 847         int ret;
 848
 849         priv->key_mapping_key++;
 850         keyconf->hw_key_idx = HW_KEY_DYNAMIC;
 851
 852         switch (keyconf->alg) {
 853         case ALG_CCMP:
 854                 ret = iwl_set_ccmp_dynamic_key_info(priv, keyconf, sta_id);
 855                 break;
 856         case ALG_TKIP:
 857                 ret = iwl_set_tkip_dynamic_key_info(priv, keyconf, sta_id);
 858                 break;
 859         case ALG_WEP:
 860                 ret = iwl_set_wep_dynamic_key_info(priv, keyconf, sta_id);
 861                 break;
 862         default:
 863                 IWL_ERR(priv,
 864                         "Unknown alg: %s alg = %d\n", __func__, keyconf->alg);
 865                 ret = -EINVAL;
 866         }
 867
 868         IWL_DEBUG_WEP("Set dynamic key: alg= %d len=%d idx=%d sta=%d ret=%d\n",
 869                       keyconf->alg, keyconf->keylen, keyconf->keyidx,
 870                       sta_id, ret);
 871
 872         return ret;
 873 }
 874 EXPORT_SYMBOL(iwl_set_dynamic_key);
 875
 876 #ifdef CONFIG_IWLWIFI_DEBUG
 877 static void iwl_dump_lq_cmd(struct iwl_priv *priv,
 878                            struct iwl_link_quality_cmd *lq)
 879 {
 880         int i;
 881         IWL_DEBUG_RATE("lq station id 0x%x\n", lq->sta_id);
 882         IWL_DEBUG_RATE("lq ant 0x%X 0x%X\n",
 883                        lq->general_params.single_stream_ant_msk,
 884                        lq->general_params.dual_stream_ant_msk);
 885
 886         for (i = 0; i < LINK_QUAL_MAX_RETRY_NUM; i++)
 887                 IWL_DEBUG_RATE("lq index %d 0x%X\n",
 888                                i, lq->rs_table[i].rate_n_flags);
 889 }
 890 #else
 891 static inline void iwl_dump_lq_cmd(struct iwl_priv *priv,
 892                                    struct iwl_link_quality_cmd *lq)
 893 {
 894 }
 895 #endif
 896
 897 int iwl_send_lq_cmd(struct iwl_priv *priv,
 898                     struct iwl_link_quality_cmd *lq, u8 flags)
 899 {
 900         struct iwl_host_cmd cmd = {
 901                 .id = REPLY_TX_LINK_QUALITY_CMD,
 902                 .len = sizeof(struct iwl_link_quality_cmd),
 903                 .meta.flags = flags,
 904                 .data = lq,
 905         };
 906
 907         if ((lq->sta_id == 0xFF) &&
 908             (priv->iw_mode == NL80211_IFTYPE_ADHOC))
 909                 return -EINVAL;
 910
 911         if (lq->sta_id == 0xFF)
 912                 lq->sta_id = IWL_AP_ID;
 913
 914         iwl_dump_lq_cmd(priv, lq);
 915
 916         if (iwl_is_associated(priv) && priv->assoc_station_added)
 917                 return  iwl_send_cmd(priv, &cmd);
 918
 919         return 0;
 920 }
 921 EXPORT_SYMBOL(iwl_send_lq_cmd);
 922
 923 /**
 924  * iwl_sta_init_lq - Initialize a station's hardware rate table
 925  *
 926  * The uCode's station table contains a table of fallback rates
 927  * for automatic fallback during transmission.
 928  *
 929  * NOTE: This sets up a default set of values.  These will be replaced later
 930  *       if the driver's iwl-agn-rs rate scaling algorithm is used, instead of
 931  *       rc80211_simple.
 932  *
 933  * NOTE: Run REPLY_ADD_STA command to set up station table entry, before
 934  *       calling this function (which runs REPLY_TX_LINK_QUALITY_CMD,
 935  *       which requires station table entry to exist).
 936  */
 937 static void iwl_sta_init_lq(struct iwl_priv *priv, const u8 *addr, int is_ap)
 938 {
 939         int i, r;
 940         struct iwl_link_quality_cmd link_cmd = {
 941                 .reserved1 = 0,
 942         };
 943         u32 rate_flags;
 944
 945         /* Set up the rate scaling to start at selected rate, fall back
 946          * all the way down to 1M in IEEE order, and then spin on 1M */
 947         if (is_ap)
 948                 r = IWL_RATE_54M_INDEX;
 949         else if (priv->band == IEEE80211_BAND_5GHZ)
 950                 r = IWL_RATE_6M_INDEX;
 951         else
 952                 r = IWL_RATE_1M_INDEX;
 953
 954         for (i = 0; i < LINK_QUAL_MAX_RETRY_NUM; i++) {
 955                 rate_flags = 0;
 956                 if (r >= IWL_FIRST_CCK_RATE && r <= IWL_LAST_CCK_RATE)
 957                         rate_flags |= RATE_MCS_CCK_MSK;
 958
 959                 rate_flags |= first_antenna(priv->hw_params.valid_tx_ant) <<
 960                                 RATE_MCS_ANT_POS;
 961
 962                 link_cmd.rs_table[i].rate_n_flags =
 963                         iwl_hw_set_rate_n_flags(iwl_rates[r].plcp, rate_flags);
 964                 r = iwl_get_prev_ieee_rate(r);
 965         }
 966
 967         link_cmd.general_params.single_stream_ant_msk =
 968                                 first_antenna(priv->hw_params.valid_tx_ant);
 969         link_cmd.general_params.dual_stream_ant_msk = 3;
 970         link_cmd.agg_params.agg_dis_start_th = 3;
 971         link_cmd.agg_params.agg_time_limit = cpu_to_le16(4000);
 972
 973         /* Update the rate scaling for control frame Tx to AP */
 974         link_cmd.sta_id = is_ap ? IWL_AP_ID : priv->hw_params.bcast_sta_id;
 975
 976         iwl_send_cmd_pdu_async(priv, REPLY_TX_LINK_QUALITY_CMD,
 977                                sizeof(link_cmd), &link_cmd, NULL);
 978 }
 979
 980 /**
 981  * iwl_rxon_add_station - add station into station table.
 982  *
 983  * there is only one AP station with id= IWL_AP_ID
 984  * NOTE: mutex must be held before calling this function
 985  */
 986 int iwl_rxon_add_station(struct iwl_priv *priv, const u8 *addr, int is_ap)
 987 {
 988         struct ieee80211_sta *sta;
 989         struct ieee80211_sta_ht_cap ht_config;
 990         struct ieee80211_sta_ht_cap *cur_ht_config = NULL;
 991         u8 sta_id;
 992
 993         /* Add station to device's station table */
 994
 995         /*
 996          * XXX: This check is definitely not correct, if we're an AP
 997          *      it'll always be false which is not what we want, but
 998          *      it doesn't look like iwlagn is prepared to be an HT
 999          *      AP anyway.
1000          */
1001         if (priv->current_ht_config.is_ht) {
1002                 rcu_read_lock();
1003                 sta = ieee80211_find_sta(priv->hw, addr);
1004                 if (sta) {
1005                         memcpy(&ht_config, &sta->ht_cap, sizeof(ht_config));
1006                         cur_ht_config = &ht_config;
1007                 }
1008                 rcu_read_unlock();
1009         }
1010
1011         sta_id = iwl_add_station_flags(priv, addr, is_ap,
1012                                        0, cur_ht_config);
1013
1014         /* Set up default rate scaling table in device's station table */
1015         iwl_sta_init_lq(priv, addr, is_ap);
1016
1017         return sta_id;
1018 }
1019 EXPORT_SYMBOL(iwl_rxon_add_station);
1020
1021 /**
1022  * iwl_get_sta_id - Find station's index within station table
1023  *
1024  * If new IBSS station, create new entry in station table
1025  */
1026 int iwl_get_sta_id(struct iwl_priv *priv, struct ieee80211_hdr *hdr)
1027 {
1028         int sta_id;
1029         u16 fc = le16_to_cpu(hdr->frame_control);
1030
1031         /* If this frame is broadcast or management, use broadcast station id */
1032         if (((fc & IEEE80211_FCTL_FTYPE) != IEEE80211_FTYPE_DATA) ||
1033             is_multicast_ether_addr(hdr->addr1))
1034                 return priv->hw_params.bcast_sta_id;
1035
1036         switch (priv->iw_mode) {
1037
1038         /* If we are a client station in a BSS network, use the special
1039          * AP station entry (that's the only station we communicate with) */
1040         case NL80211_IFTYPE_STATION:
1041                 return IWL_AP_ID;
1042
1043         /* If we are an AP, then find the station, or use BCAST */
1044         case NL80211_IFTYPE_AP:
1045                 sta_id = iwl_find_station(priv, hdr->addr1);
1046                 if (sta_id != IWL_INVALID_STATION)
1047                         return sta_id;
1048                 return priv->hw_params.bcast_sta_id;
1049
1050         /* If this frame is going out to an IBSS network, find the station,
1051          * or create a new station table entry */
1052         case NL80211_IFTYPE_ADHOC:
1053                 sta_id = iwl_find_station(priv, hdr->addr1);
1054                 if (sta_id != IWL_INVALID_STATION)
1055                         return sta_id;
1056
1057                 /* Create new station table entry */
1058                 sta_id = iwl_add_station_flags(priv, hdr->addr1,
1059                                                    0, CMD_ASYNC, NULL);
1060
1061                 if (sta_id != IWL_INVALID_STATION)
1062                         return sta_id;
1063
1064                 IWL_DEBUG_DROP("Station %pM not in station map. "
1065                                "Defaulting to broadcast...\n",
1066                                hdr->addr1);
1067                 iwl_print_hex_dump(priv, IWL_DL_DROP, (u8 *) hdr, sizeof(*hdr));
1068                 return priv->hw_params.bcast_sta_id;
1069
1070         /* If we are in monitor mode, use BCAST. This is required for
1071          * packet injection. */
1072         case NL80211_IFTYPE_MONITOR:
1073                 return priv->hw_params.bcast_sta_id;
1074
1075         default:
1076                 IWL_WARN(priv, "Unknown mode of operation: %d\n",
1077                         priv->iw_mode);
1078                 return priv->hw_params.bcast_sta_id;
1079         }
1080 }
1081 EXPORT_SYMBOL(iwl_get_sta_id);
1082
1083 /**
1084  * iwl_sta_tx_modify_enable_tid - Enable Tx for this TID in station table
1085  */
1086 void iwl_sta_tx_modify_enable_tid(struct iwl_priv *priv, int sta_id, int tid)
1087 {
1088         unsigned long flags;
1089
1090         /* Remove "disable" flag, to enable Tx for this TID */
1091         spin_lock_irqsave(&priv->sta_lock, flags);
1092         priv->stations[sta_id].sta.sta.modify_mask = STA_MODIFY_TID_DISABLE_TX;
1093         priv->stations[sta_id].sta.tid_disable_tx &= cpu_to_le16(~(1 << tid));
1094         priv->stations[sta_id].sta.mode = STA_CONTROL_MODIFY_MSK;
1095         spin_unlock_irqrestore(&priv->sta_lock, flags);
1096
1097         iwl_send_add_sta(priv, &priv->stations[sta_id].sta, CMD_ASYNC);
1098 }
1099 EXPORT_SYMBOL(iwl_sta_tx_modify_enable_tid);
1100
1101 int iwl_sta_rx_agg_start(struct iwl_priv *priv,
1102                          const u8 *addr, int tid, u16 ssn)
1103 {
1104         unsigned long flags;
1105         int sta_id;
1106
1107         sta_id = iwl_find_station(priv, addr);
1108         if (sta_id == IWL_INVALID_STATION)
1109                 return -ENXIO;
1110
1111         spin_lock_irqsave(&priv->sta_lock, flags);
1112         priv->stations[sta_id].sta.station_flags_msk = 0;
1113         priv->stations[sta_id].sta.sta.modify_mask = STA_MODIFY_ADDBA_TID_MSK;
1114         priv->stations[sta_id].sta.add_immediate_ba_tid = (u8)tid;
1115         priv->stations[sta_id].sta.add_immediate_ba_ssn = cpu_to_le16(ssn);
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_start);
1123
1124 int iwl_sta_rx_agg_stop(struct iwl_priv *priv, const u8 *addr, int tid)
1125 {
1126         unsigned long flags;
1127         int sta_id;
1128
1129         sta_id = iwl_find_station(priv, addr);
1130         if (sta_id == IWL_INVALID_STATION)
1131                 return -ENXIO;
1132
1133         spin_lock_irqsave(&priv->sta_lock, flags);
1134         priv->stations[sta_id].sta.station_flags_msk = 0;
1135         priv->stations[sta_id].sta.sta.modify_mask = STA_MODIFY_DELBA_TID_MSK;
1136         priv->stations[sta_id].sta.remove_immediate_ba_tid = (u8)tid;
1137         priv->stations[sta_id].sta.mode = STA_CONTROL_MODIFY_MSK;
1138         spin_unlock_irqrestore(&priv->sta_lock, flags);
1139
1140         return iwl_send_add_sta(priv, &priv->stations[sta_id].sta,
1141                                         CMD_ASYNC);
1142 }
1143 EXPORT_SYMBOL(iwl_sta_rx_agg_stop);
1144
1145 static void iwl_sta_modify_ps_wake(struct iwl_priv *priv, int sta_id)
1146 {
1147         unsigned long flags;
1148
1149         spin_lock_irqsave(&priv->sta_lock, flags);
1150         priv->stations[sta_id].sta.station_flags &= ~STA_FLG_PWR_SAVE_MSK;
1151         priv->stations[sta_id].sta.station_flags_msk = STA_FLG_PWR_SAVE_MSK;
1152         priv->stations[sta_id].sta.sta.modify_mask = 0;
1153         priv->stations[sta_id].sta.mode = STA_CONTROL_MODIFY_MSK;
1154         spin_unlock_irqrestore(&priv->sta_lock, flags);
1155
1156         iwl_send_add_sta(priv, &priv->stations[sta_id].sta, CMD_ASYNC);
1157 }
1158
1159 void iwl_update_ps_mode(struct iwl_priv *priv, u16 ps_bit, u8 *addr)
1160 {
1161         /* FIXME: need locking over ps_status ??? */
1162         u8 sta_id = iwl_find_station(priv, addr);
1163
1164         if (sta_id != IWL_INVALID_STATION) {
1165                 u8 sta_awake = priv->stations[sta_id].
1166                                 ps_status == STA_PS_STATUS_WAKE;
1167
1168                 if (sta_awake && ps_bit)
1169                         priv->stations[sta_id].ps_status = STA_PS_STATUS_SLEEP;
1170                 else if (!sta_awake && !ps_bit) {
1171                         iwl_sta_modify_ps_wake(priv, sta_id);
1172                         priv->stations[sta_id].ps_status = STA_PS_STATUS_WAKE;
1173                 }
1174         }
1175 }
1176