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

   1 /******************************************************************************
   2  *
   3  * Copyright(c) 2003 - 2008 Intel Corporation. All rights reserved.
   4  *
   5  * Portions of this file are derived from the ipw3945 project, as well
   6  * as portions of the ieee80211 subsystem header files.
   7  *
   8  * This program is free software; you can redistribute it and/or modify it
   9  * under the terms of version 2 of the GNU General Public License as
  10  * published by the Free Software Foundation.
  11  *
  12  * This program is distributed in the hope that it will be useful, but WITHOUT
  13  * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
  14  * FITNESS FOR A PARTICULAR PURPOSE.  See the GNU General Public License for
  15  * more details.
  16  *
  17  * You should have received a copy of the GNU General Public License along with
  18  * this program; if not, write to the Free Software Foundation, Inc.,
  19  * 51 Franklin Street, Fifth Floor, Boston, MA 02110, USA
  20  *
  21  * The full GNU General Public License is included in this distribution in the
  22  * file called LICENSE.
  23  *
  24  * Contact Information:
  25  *  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                 IWL_ERROR("ACTIVATE a non DRIVER active station %d\n", sta_id);
  91
  92         priv->stations[sta_id].used |= IWL_STA_UCODE_ACTIVE;
  93         IWL_DEBUG_ASSOC("Added STA to Ucode: %pM\n",
  94                         priv->stations[sta_id].sta.sta.addr);
  95
  96         spin_unlock_irqrestore(&priv->sta_lock, flags);
  97 }
  98
  99 static int iwl_add_sta_callback(struct iwl_priv *priv,
 100                                    struct iwl_cmd *cmd, struct sk_buff *skb)
 101 {
 102         struct iwl_rx_packet *res = NULL;
 103         struct iwl_addsta_cmd *addsta =
 104                 (struct iwl_addsta_cmd *)cmd->cmd.payload;
 105         u8 sta_id = addsta->sta.sta_id;
 106
 107         if (!skb) {
 108                 IWL_ERROR("Error: Response NULL in REPLY_ADD_STA.\n");
 109                 return 1;
 110         }
 111
 112         res = (struct iwl_rx_packet *)skb->data;
 113         if (res->hdr.flags & IWL_CMD_FAILED_MSK) {
 114                 IWL_ERROR("Bad return from REPLY_ADD_STA (0x%08X)\n",
 115                           res->hdr.flags);
 116                 return 1;
 117         }
 118
 119         switch (res->u.add_sta.status) {
 120         case ADD_STA_SUCCESS_MSK:
 121                 iwl_sta_ucode_activate(priv, sta_id);
 122                  /* fall through */
 123         default:
 124                 IWL_DEBUG_HC("Received REPLY_ADD_STA:(0x%08X)\n",
 125                              res->u.add_sta.status);
 126                 break;
 127         }
 128
 129         /* We didn't cache the SKB; let the caller free it */
 130         return 1;
 131 }
 132
 133 static int iwl_send_add_sta(struct iwl_priv *priv,
 134                      struct iwl_addsta_cmd *sta, u8 flags)
 135 {
 136         struct iwl_rx_packet *res = NULL;
 137         int ret = 0;
 138         u8 data[sizeof(*sta)];
 139         struct iwl_host_cmd cmd = {
 140                 .id = REPLY_ADD_STA,
 141                 .meta.flags = flags,
 142                 .data = data,
 143         };
 144
 145         if (flags & CMD_ASYNC)
 146                 cmd.meta.u.callback = iwl_add_sta_callback;
 147         else
 148                 cmd.meta.flags |= CMD_WANT_SKB;
 149
 150         cmd.len = priv->cfg->ops->utils->build_addsta_hcmd(sta, data);
 151         ret = iwl_send_cmd(priv, &cmd);
 152
 153         if (ret || (flags & CMD_ASYNC))
 154                 return ret;
 155
 156         res = (struct iwl_rx_packet *)cmd.meta.u.skb->data;
 157         if (res->hdr.flags & IWL_CMD_FAILED_MSK) {
 158                 IWL_ERROR("Bad return from REPLY_ADD_STA (0x%08X)\n",
 159                           res->hdr.flags);
 160                 ret = -EIO;
 161         }
 162
 163         if (ret == 0) {
 164                 switch (res->u.add_sta.status) {
 165                 case ADD_STA_SUCCESS_MSK:
 166                         iwl_sta_ucode_activate(priv, sta->sta.sta_id);
 167                         IWL_DEBUG_INFO("REPLY_ADD_STA PASSED\n");
 168                         break;
 169                 default:
 170                         ret = -EIO;
 171                         IWL_WARNING("REPLY_ADD_STA failed\n");
 172                         break;
 173                 }
 174         }
 175
 176         priv->alloc_rxb_skb--;
 177         dev_kfree_skb_any(cmd.meta.u.skb);
 178
 179         return ret;
 180 }
 181
 182 static void iwl_set_ht_add_station(struct iwl_priv *priv, u8 index,
 183                                    struct ieee80211_sta_ht_cap *sta_ht_inf)
 184 {
 185         __le32 sta_flags;
 186         u8 mimo_ps_mode;
 187
 188         if (!sta_ht_inf || !sta_ht_inf->ht_supported)
 189                 goto done;
 190
 191         mimo_ps_mode = (sta_ht_inf->cap & IEEE80211_HT_CAP_SM_PS) >> 2;
 192
 193         sta_flags = priv->stations[index].sta.station_flags;
 194
 195         sta_flags &= ~(STA_FLG_RTS_MIMO_PROT_MSK | STA_FLG_MIMO_DIS_MSK);
 196
 197         switch (mimo_ps_mode) {
 198         case WLAN_HT_CAP_SM_PS_STATIC:
 199                 sta_flags |= STA_FLG_MIMO_DIS_MSK;
 200                 break;
 201         case WLAN_HT_CAP_SM_PS_DYNAMIC:
 202                 sta_flags |= STA_FLG_RTS_MIMO_PROT_MSK;
 203                 break;
 204         case WLAN_HT_CAP_SM_PS_DISABLED:
 205                 break;
 206         default:
 207                 IWL_WARNING("Invalid MIMO PS mode %d\n", mimo_ps_mode);
 208                 break;
 209         }
 210
 211         sta_flags |= cpu_to_le32(
 212               (u32)sta_ht_inf->ampdu_factor << STA_FLG_MAX_AGG_SIZE_POS);
 213
 214         sta_flags |= cpu_to_le32(
 215               (u32)sta_ht_inf->ampdu_density << STA_FLG_AGG_MPDU_DENSITY_POS);
 216
 217         if (iwl_is_fat_tx_allowed(priv, sta_ht_inf))
 218                 sta_flags |= STA_FLG_FAT_EN_MSK;
 219         else
 220                 sta_flags &= ~STA_FLG_FAT_EN_MSK;
 221
 222         priv->stations[index].sta.station_flags = sta_flags;
 223  done:
 224         return;
 225 }
 226
 227 /**
 228  * iwl_add_station_flags - Add station to tables in driver and device
 229  */
 230 u8 iwl_add_station_flags(struct iwl_priv *priv, const u8 *addr, int is_ap,
 231                          u8 flags, struct ieee80211_sta_ht_cap *ht_info)
 232 {
 233         int i;
 234         int sta_id = IWL_INVALID_STATION;
 235         struct iwl_station_entry *station;
 236         unsigned long flags_spin;
 237
 238         spin_lock_irqsave(&priv->sta_lock, flags_spin);
 239         if (is_ap)
 240                 sta_id = IWL_AP_ID;
 241         else if (is_broadcast_ether_addr(addr))
 242                 sta_id = priv->hw_params.bcast_sta_id;
 243         else
 244                 for (i = IWL_STA_ID; i < priv->hw_params.max_stations; i++) {
 245                         if (!compare_ether_addr(priv->stations[i].sta.sta.addr,
 246                                                 addr)) {
 247                                 sta_id = i;
 248                                 break;
 249                         }
 250
 251                         if (!priv->stations[i].used &&
 252                             sta_id == IWL_INVALID_STATION)
 253                                 sta_id = i;
 254                 }
 255
 256         /* These two conditions have the same outcome, but keep them separate
 257            since they have different meanings */
 258         if (unlikely(sta_id == IWL_INVALID_STATION)) {
 259                 spin_unlock_irqrestore(&priv->sta_lock, flags_spin);
 260                 return sta_id;
 261         }
 262
 263         if (priv->stations[sta_id].used &&
 264             !compare_ether_addr(priv->stations[sta_id].sta.sta.addr, addr)) {
 265                 spin_unlock_irqrestore(&priv->sta_lock, flags_spin);
 266                 return sta_id;
 267         }
 268
 269
 270         station = &priv->stations[sta_id];
 271         station->used = IWL_STA_DRIVER_ACTIVE;
 272         IWL_DEBUG_ASSOC("Add STA to driver ID %d: %pM\n",
 273                         sta_id, addr);
 274         priv->num_stations++;
 275
 276         /* Set up the REPLY_ADD_STA command to send to device */
 277         memset(&station->sta, 0, sizeof(struct iwl_addsta_cmd));
 278         memcpy(station->sta.sta.addr, addr, ETH_ALEN);
 279         station->sta.mode = 0;
 280         station->sta.sta.sta_id = sta_id;
 281         station->sta.station_flags = 0;
 282
 283         /* BCAST station and IBSS stations do not work in HT mode */
 284         if (sta_id != priv->hw_params.bcast_sta_id &&
 285             priv->iw_mode != NL80211_IFTYPE_ADHOC)
 286                 iwl_set_ht_add_station(priv, sta_id, ht_info);
 287
 288         spin_unlock_irqrestore(&priv->sta_lock, flags_spin);
 289
 290         /* Add station to device's station table */
 291         iwl_send_add_sta(priv, &station->sta, flags);
 292         return sta_id;
 293
 294 }
 295 EXPORT_SYMBOL(iwl_add_station_flags);
 296
 297 static void iwl_sta_ucode_deactivate(struct iwl_priv *priv, const char *addr)
 298 {
 299         unsigned long flags;
 300         u8 sta_id = iwl_find_station(priv, addr);
 301
 302         BUG_ON(sta_id == IWL_INVALID_STATION);
 303
 304         IWL_DEBUG_ASSOC("Removed STA from Ucode: %pM\n", addr);
 305
 306         spin_lock_irqsave(&priv->sta_lock, flags);
 307
 308         /* Ucode must be active and driver must be non active */
 309         if (priv->stations[sta_id].used != IWL_STA_UCODE_ACTIVE)
 310                 IWL_ERROR("removed non active STA %d\n", sta_id);
 311
 312         priv->stations[sta_id].used &= ~IWL_STA_UCODE_ACTIVE;
 313
 314         memset(&priv->stations[sta_id], 0, sizeof(struct iwl_station_entry));
 315         spin_unlock_irqrestore(&priv->sta_lock, flags);
 316 }
 317
 318 static int iwl_remove_sta_callback(struct iwl_priv *priv,
 319                                    struct iwl_cmd *cmd, struct sk_buff *skb)
 320 {
 321         struct iwl_rx_packet *res = NULL;
 322         struct iwl_rem_sta_cmd *rm_sta =
 323                  (struct iwl_rem_sta_cmd *)cmd->cmd.payload;
 324         const char *addr = rm_sta->addr;
 325
 326         if (!skb) {
 327                 IWL_ERROR("Error: Response NULL in REPLY_REMOVE_STA.\n");
 328                 return 1;
 329         }
 330
 331         res = (struct iwl_rx_packet *)skb->data;
 332         if (res->hdr.flags & IWL_CMD_FAILED_MSK) {
 333                 IWL_ERROR("Bad return from REPLY_REMOVE_STA (0x%08X)\n",
 334                 res->hdr.flags);
 335                 return 1;
 336         }
 337
 338         switch (res->u.rem_sta.status) {
 339         case REM_STA_SUCCESS_MSK:
 340                 iwl_sta_ucode_deactivate(priv, addr);
 341                 break;
 342         default:
 343                 IWL_ERROR("REPLY_REMOVE_STA failed\n");
 344                 break;
 345         }
 346
 347         /* We didn't cache the SKB; let the caller free it */
 348         return 1;
 349 }
 350
 351 static int iwl_send_remove_station(struct iwl_priv *priv, const u8 *addr,
 352                                    u8 flags)
 353 {
 354         struct iwl_rx_packet *res = NULL;
 355         int ret;
 356
 357         struct iwl_rem_sta_cmd rm_sta_cmd;
 358
 359         struct iwl_host_cmd cmd = {
 360                 .id = REPLY_REMOVE_STA,
 361                 .len = sizeof(struct iwl_rem_sta_cmd),
 362                 .meta.flags = flags,
 363                 .data = &rm_sta_cmd,
 364         };
 365
 366         memset(&rm_sta_cmd, 0, sizeof(rm_sta_cmd));
 367         rm_sta_cmd.num_sta = 1;
 368         memcpy(&rm_sta_cmd.addr, addr , ETH_ALEN);
 369
 370         if (flags & CMD_ASYNC)
 371                 cmd.meta.u.callback = iwl_remove_sta_callback;
 372         else
 373                 cmd.meta.flags |= CMD_WANT_SKB;
 374         ret = iwl_send_cmd(priv, &cmd);
 375
 376         if (ret || (flags & CMD_ASYNC))
 377                 return ret;
 378
 379         res = (struct iwl_rx_packet *)cmd.meta.u.skb->data;
 380         if (res->hdr.flags & IWL_CMD_FAILED_MSK) {
 381                 IWL_ERROR("Bad return from REPLY_REMOVE_STA (0x%08X)\n",
 382                           res->hdr.flags);
 383                 ret = -EIO;
 384         }
 385
 386         if (!ret) {
 387                 switch (res->u.rem_sta.status) {
 388                 case REM_STA_SUCCESS_MSK:
 389                         iwl_sta_ucode_deactivate(priv, addr);
 390                         IWL_DEBUG_ASSOC("REPLY_REMOVE_STA PASSED\n");
 391                         break;
 392                 default:
 393                         ret = -EIO;
 394                         IWL_ERROR("REPLY_REMOVE_STA failed\n");
 395                         break;
 396                 }
 397         }
 398
 399         priv->alloc_rxb_skb--;
 400         dev_kfree_skb_any(cmd.meta.u.skb);
 401
 402         return ret;
 403 }
 404
 405 /**
 406  * iwl_remove_station - Remove driver's knowledge of station.
 407  */
 408 int iwl_remove_station(struct iwl_priv *priv, const u8 *addr, int is_ap)
 409 {
 410         int sta_id = IWL_INVALID_STATION;
 411         int i, ret = -EINVAL;
 412         unsigned long flags;
 413
 414         spin_lock_irqsave(&priv->sta_lock, flags);
 415
 416         if (is_ap)
 417                 sta_id = IWL_AP_ID;
 418         else if (is_broadcast_ether_addr(addr))
 419                 sta_id = priv->hw_params.bcast_sta_id;
 420         else
 421                 for (i = IWL_STA_ID; i < priv->hw_params.max_stations; i++)
 422                         if (priv->stations[i].used &&
 423                             !compare_ether_addr(priv->stations[i].sta.sta.addr,
 424                                                 addr)) {
 425                                 sta_id = i;
 426                                 break;
 427                         }
 428
 429         if (unlikely(sta_id == IWL_INVALID_STATION))
 430                 goto out;
 431
 432         IWL_DEBUG_ASSOC("Removing STA from driver:%d  %pM\n",
 433                 sta_id, addr);
 434
 435         if (!(priv->stations[sta_id].used & IWL_STA_DRIVER_ACTIVE)) {
 436                 IWL_ERROR("Removing %pM but non DRIVER active\n",
 437                                 addr);
 438                 goto out;
 439         }
 440
 441         if (!(priv->stations[sta_id].used & IWL_STA_UCODE_ACTIVE)) {
 442                 IWL_ERROR("Removing %pM but non UCODE active\n",
 443                                 addr);
 444                 goto out;
 445         }
 446
 447
 448         priv->stations[sta_id].used &= ~IWL_STA_DRIVER_ACTIVE;
 449
 450         priv->num_stations--;
 451
 452         BUG_ON(priv->num_stations < 0);
 453
 454         spin_unlock_irqrestore(&priv->sta_lock, flags);
 455
 456         ret = iwl_send_remove_station(priv, addr, CMD_ASYNC);
 457         return ret;
 458 out:
 459         spin_unlock_irqrestore(&priv->sta_lock, flags);
 460         return ret;
 461 }
 462 EXPORT_SYMBOL(iwl_remove_station);
 463
 464 /**
 465  * iwl_clear_stations_table - Clear the driver's station table
 466  *
 467  * NOTE:  This does not clear or otherwise alter the device's station table.
 468  */
 469 void iwl_clear_stations_table(struct iwl_priv *priv)
 470 {
 471         unsigned long flags;
 472
 473         spin_lock_irqsave(&priv->sta_lock, flags);
 474
 475         if (iwl_is_alive(priv) &&
 476            !test_bit(STATUS_EXIT_PENDING, &priv->status) &&
 477            iwl_send_cmd_pdu_async(priv, REPLY_REMOVE_ALL_STA, 0, NULL, NULL))
 478                 IWL_ERROR("Couldn't clear the station table\n");
 479
 480         priv->num_stations = 0;
 481         memset(priv->stations, 0, sizeof(priv->stations));
 482
 483         spin_unlock_irqrestore(&priv->sta_lock, flags);
 484 }
 485 EXPORT_SYMBOL(iwl_clear_stations_table);
 486
 487 static int iwl_get_free_ucode_key_index(struct iwl_priv *priv)
 488 {
 489         int i;
 490
 491         for (i = 0; i < STA_KEY_MAX_NUM; i++)
 492                 if (!test_and_set_bit(i, &priv->ucode_key_table))
 493                         return i;
 494
 495         return WEP_INVALID_OFFSET;
 496 }
 497
 498 int iwl_send_static_wepkey_cmd(struct iwl_priv *priv, u8 send_if_empty)
 499 {
 500         int i, not_empty = 0;
 501         u8 buff[sizeof(struct iwl_wep_cmd) +
 502                 sizeof(struct iwl_wep_key) * WEP_KEYS_MAX];
 503         struct iwl_wep_cmd *wep_cmd = (struct iwl_wep_cmd *)buff;
 504         size_t cmd_size  = sizeof(struct iwl_wep_cmd);
 505         struct iwl_host_cmd cmd = {
 506                 .id = REPLY_WEPKEY,
 507                 .data = wep_cmd,
 508                 .meta.flags = CMD_ASYNC,
 509         };
 510
 511         memset(wep_cmd, 0, cmd_size +
 512                         (sizeof(struct iwl_wep_key) * WEP_KEYS_MAX));
 513
 514         for (i = 0; i < WEP_KEYS_MAX ; i++) {
 515                 wep_cmd->key[i].key_index = i;
 516                 if (priv->wep_keys[i].key_size) {
 517                         wep_cmd->key[i].key_offset = i;
 518                         not_empty = 1;
 519                 } else {
 520                         wep_cmd->key[i].key_offset = WEP_INVALID_OFFSET;
 521                 }
 522
 523                 wep_cmd->key[i].key_size = priv->wep_keys[i].key_size;
 524                 memcpy(&wep_cmd->key[i].key[3], priv->wep_keys[i].key,
 525                                 priv->wep_keys[i].key_size);
 526         }
 527
 528         wep_cmd->global_key_type = WEP_KEY_WEP_TYPE;
 529         wep_cmd->num_keys = WEP_KEYS_MAX;
 530
 531         cmd_size += sizeof(struct iwl_wep_key) * WEP_KEYS_MAX;
 532
 533         cmd.len = cmd_size;
 534
 535         if (not_empty || send_if_empty)
 536                 return iwl_send_cmd(priv, &cmd);
 537         else
 538                 return 0;
 539 }
 540 EXPORT_SYMBOL(iwl_send_static_wepkey_cmd);
 541
 542 int iwl_remove_default_wep_key(struct iwl_priv *priv,
 543                                struct ieee80211_key_conf *keyconf)
 544 {
 545         int ret;
 546         unsigned long flags;
 547
 548         spin_lock_irqsave(&priv->sta_lock, flags);
 549
 550         if (!test_and_clear_bit(keyconf->keyidx, &priv->ucode_key_table))
 551                 IWL_ERROR("index %d not used in uCode key table.\n",
 552                           keyconf->keyidx);
 553
 554         priv->default_wep_key--;
 555         memset(&priv->wep_keys[keyconf->keyidx], 0, sizeof(priv->wep_keys[0]));
 556         ret = iwl_send_static_wepkey_cmd(priv, 1);
 557         IWL_DEBUG_WEP("Remove default WEP key: idx=%d ret=%d\n",
 558                       keyconf->keyidx, ret);
 559         spin_unlock_irqrestore(&priv->sta_lock, flags);
 560
 561         return ret;
 562 }
 563 EXPORT_SYMBOL(iwl_remove_default_wep_key);
 564
 565 int iwl_set_default_wep_key(struct iwl_priv *priv,
 566                             struct ieee80211_key_conf *keyconf)
 567 {
 568         int ret;
 569         unsigned long flags;
 570
 571         if (keyconf->keylen != WEP_KEY_LEN_128 &&
 572             keyconf->keylen != WEP_KEY_LEN_64) {
 573                 IWL_DEBUG_WEP("Bad WEP key length %d\n", keyconf->keylen);
 574                 return -EINVAL;
 575         }
 576
 577         keyconf->flags &= ~IEEE80211_KEY_FLAG_GENERATE_IV;
 578         keyconf->hw_key_idx = HW_KEY_DEFAULT;
 579         priv->stations[IWL_AP_ID].keyinfo.alg = ALG_WEP;
 580
 581         spin_lock_irqsave(&priv->sta_lock, flags);
 582         priv->default_wep_key++;
 583
 584         if (test_and_set_bit(keyconf->keyidx, &priv->ucode_key_table))
 585                 IWL_ERROR("index %d already used in uCode key table.\n",
 586                         keyconf->keyidx);
 587
 588         priv->wep_keys[keyconf->keyidx].key_size = keyconf->keylen;
 589         memcpy(&priv->wep_keys[keyconf->keyidx].key, &keyconf->key,
 590                                                         keyconf->keylen);
 591
 592         ret = iwl_send_static_wepkey_cmd(priv, 0);
 593         IWL_DEBUG_WEP("Set default WEP key: len=%d idx=%d ret=%d\n",
 594                 keyconf->keylen, keyconf->keyidx, ret);
 595         spin_unlock_irqrestore(&priv->sta_lock, flags);
 596
 597         return ret;
 598 }
 599 EXPORT_SYMBOL(iwl_set_default_wep_key);
 600
 601 static int iwl_set_wep_dynamic_key_info(struct iwl_priv *priv,
 602                                 struct ieee80211_key_conf *keyconf,
 603                                 u8 sta_id)
 604 {
 605         unsigned long flags;
 606         __le16 key_flags = 0;
 607         int ret;
 608
 609         keyconf->flags &= ~IEEE80211_KEY_FLAG_GENERATE_IV;
 610
 611         key_flags |= (STA_KEY_FLG_WEP | STA_KEY_FLG_MAP_KEY_MSK);
 612         key_flags |= cpu_to_le16(keyconf->keyidx << STA_KEY_FLG_KEYID_POS);
 613         key_flags &= ~STA_KEY_FLG_INVALID;
 614
 615         if (keyconf->keylen == WEP_KEY_LEN_128)
 616                 key_flags |= STA_KEY_FLG_KEY_SIZE_MSK;
 617
 618         if (sta_id == priv->hw_params.bcast_sta_id)
 619                 key_flags |= STA_KEY_MULTICAST_MSK;
 620
 621         spin_lock_irqsave(&priv->sta_lock, flags);
 622
 623         priv->stations[sta_id].keyinfo.alg = keyconf->alg;
 624         priv->stations[sta_id].keyinfo.keylen = keyconf->keylen;
 625         priv->stations[sta_id].keyinfo.keyidx = keyconf->keyidx;
 626
 627         memcpy(priv->stations[sta_id].keyinfo.key,
 628                                 keyconf->key, keyconf->keylen);
 629
 630         memcpy(&priv->stations[sta_id].sta.key.key[3],
 631                                 keyconf->key, keyconf->keylen);
 632
 633         if ((priv->stations[sta_id].sta.key.key_flags & STA_KEY_FLG_ENCRYPT_MSK)
 634                         == STA_KEY_FLG_NO_ENC)
 635                 priv->stations[sta_id].sta.key.key_offset =
 636                                  iwl_get_free_ucode_key_index(priv);
 637         /* else, we are overriding an existing key => no need to allocated room
 638          * in uCode. */
 639
 640         WARN(priv->stations[sta_id].sta.key.key_offset == WEP_INVALID_OFFSET,
 641                 "no space for new kew");
 642
 643         priv->stations[sta_id].sta.key.key_flags = key_flags;
 644         priv->stations[sta_id].sta.sta.modify_mask = STA_MODIFY_KEY_MASK;
 645         priv->stations[sta_id].sta.mode = STA_CONTROL_MODIFY_MSK;
 646
 647         ret = iwl_send_add_sta(priv, &priv->stations[sta_id].sta, CMD_ASYNC);
 648
 649         spin_unlock_irqrestore(&priv->sta_lock, flags);
 650
 651         return ret;
 652 }
 653
 654 static int iwl_set_ccmp_dynamic_key_info(struct iwl_priv *priv,
 655                                    struct ieee80211_key_conf *keyconf,
 656                                    u8 sta_id)
 657 {
 658         unsigned long flags;
 659         __le16 key_flags = 0;
 660         int ret;
 661
 662         key_flags |= (STA_KEY_FLG_CCMP | STA_KEY_FLG_MAP_KEY_MSK);
 663         key_flags |= cpu_to_le16(keyconf->keyidx << STA_KEY_FLG_KEYID_POS);
 664         key_flags &= ~STA_KEY_FLG_INVALID;
 665
 666         if (sta_id == priv->hw_params.bcast_sta_id)
 667                 key_flags |= STA_KEY_MULTICAST_MSK;
 668
 669         keyconf->flags |= IEEE80211_KEY_FLAG_GENERATE_IV;
 670
 671         spin_lock_irqsave(&priv->sta_lock, flags);
 672         priv->stations[sta_id].keyinfo.alg = keyconf->alg;
 673         priv->stations[sta_id].keyinfo.keylen = keyconf->keylen;
 674
 675         memcpy(priv->stations[sta_id].keyinfo.key, keyconf->key,
 676                keyconf->keylen);
 677
 678         memcpy(priv->stations[sta_id].sta.key.key, keyconf->key,
 679                keyconf->keylen);
 680
 681         if ((priv->stations[sta_id].sta.key.key_flags & STA_KEY_FLG_ENCRYPT_MSK)
 682                         == STA_KEY_FLG_NO_ENC)
 683                 priv->stations[sta_id].sta.key.key_offset =
 684                                  iwl_get_free_ucode_key_index(priv);
 685         /* else, we are overriding an existing key => no need to allocated room
 686          * in uCode. */
 687
 688         WARN(priv->stations[sta_id].sta.key.key_offset == WEP_INVALID_OFFSET,
 689                 "no space for new kew");
 690
 691         priv->stations[sta_id].sta.key.key_flags = key_flags;
 692         priv->stations[sta_id].sta.sta.modify_mask = STA_MODIFY_KEY_MASK;
 693         priv->stations[sta_id].sta.mode = STA_CONTROL_MODIFY_MSK;
 694
 695         ret = iwl_send_add_sta(priv, &priv->stations[sta_id].sta, CMD_ASYNC);
 696
 697         spin_unlock_irqrestore(&priv->sta_lock, flags);
 698
 699         return ret;
 700 }
 701
 702 static int iwl_set_tkip_dynamic_key_info(struct iwl_priv *priv,
 703                                    struct ieee80211_key_conf *keyconf,
 704                                    u8 sta_id)
 705 {
 706         unsigned long flags;
 707         int ret = 0;
 708
 709         keyconf->flags |= IEEE80211_KEY_FLAG_GENERATE_IV;
 710         keyconf->flags |= IEEE80211_KEY_FLAG_GENERATE_MMIC;
 711
 712         spin_lock_irqsave(&priv->sta_lock, flags);
 713
 714         priv->stations[sta_id].keyinfo.alg = keyconf->alg;
 715         priv->stations[sta_id].keyinfo.keylen = 16;
 716
 717         if ((priv->stations[sta_id].sta.key.key_flags & STA_KEY_FLG_ENCRYPT_MSK)
 718                         == STA_KEY_FLG_NO_ENC)
 719                 priv->stations[sta_id].sta.key.key_offset =
 720                                  iwl_get_free_ucode_key_index(priv);
 721         /* else, we are overriding an existing key => no need to allocated room
 722          * in uCode. */
 723
 724         WARN(priv->stations[sta_id].sta.key.key_offset == WEP_INVALID_OFFSET,
 725                 "no space for new kew");
 726
 727         /* This copy is acutally not needed: we get the key with each TX */
 728         memcpy(priv->stations[sta_id].keyinfo.key, keyconf->key, 16);
 729
 730         memcpy(priv->stations[sta_id].sta.key.key, keyconf->key, 16);
 731
 732         spin_unlock_irqrestore(&priv->sta_lock, flags);
 733
 734         return ret;
 735 }
 736
 737 void iwl_update_tkip_key(struct iwl_priv *priv,
 738                         struct ieee80211_key_conf *keyconf,
 739                         const u8 *addr, u32 iv32, u16 *phase1key)
 740 {
 741         u8 sta_id = IWL_INVALID_STATION;
 742         unsigned long flags;
 743         __le16 key_flags = 0;
 744         int i;
 745         DECLARE_MAC_BUF(mac);
 746
 747         sta_id = iwl_find_station(priv, addr);
 748         if (sta_id == IWL_INVALID_STATION) {
 749                 IWL_DEBUG_MAC80211("leave - %pM not in station map.\n",
 750                                    addr);
 751                 return;
 752         }
 753
 754         if (iwl_scan_cancel(priv)) {
 755                 /* cancel scan failed, just live w/ bad key and rely
 756                    briefly on SW decryption */
 757                 return;
 758         }
 759
 760         key_flags |= (STA_KEY_FLG_TKIP | STA_KEY_FLG_MAP_KEY_MSK);
 761         key_flags |= cpu_to_le16(keyconf->keyidx << STA_KEY_FLG_KEYID_POS);
 762         key_flags &= ~STA_KEY_FLG_INVALID;
 763
 764         if (sta_id == priv->hw_params.bcast_sta_id)
 765                 key_flags |= STA_KEY_MULTICAST_MSK;
 766
 767         spin_lock_irqsave(&priv->sta_lock, flags);
 768
 769         priv->stations[sta_id].sta.key.key_flags = key_flags;
 770         priv->stations[sta_id].sta.key.tkip_rx_tsc_byte2 = (u8) iv32;
 771
 772         for (i = 0; i < 5; i++)
 773                 priv->stations[sta_id].sta.key.tkip_rx_ttak[i] =
 774                         cpu_to_le16(phase1key[i]);
 775
 776         priv->stations[sta_id].sta.sta.modify_mask = STA_MODIFY_KEY_MASK;
 777         priv->stations[sta_id].sta.mode = STA_CONTROL_MODIFY_MSK;
 778
 779         iwl_send_add_sta(priv, &priv->stations[sta_id].sta, CMD_ASYNC);
 780
 781         spin_unlock_irqrestore(&priv->sta_lock, flags);
 782
 783 }
 784 EXPORT_SYMBOL(iwl_update_tkip_key);
 785
 786 int iwl_remove_dynamic_key(struct iwl_priv *priv,
 787                                 struct ieee80211_key_conf *keyconf,
 788                                 u8 sta_id)
 789 {
 790         unsigned long flags;
 791         int ret = 0;
 792         u16 key_flags;
 793         u8 keyidx;
 794
 795         priv->key_mapping_key--;
 796
 797         spin_lock_irqsave(&priv->sta_lock, flags);
 798         key_flags = le16_to_cpu(priv->stations[sta_id].sta.key.key_flags);
 799         keyidx = (key_flags >> STA_KEY_FLG_KEYID_POS) & 0x3;
 800
 801         IWL_DEBUG_WEP("Remove dynamic key: idx=%d sta=%d\n",
 802                       keyconf->keyidx, sta_id);
 803
 804         if (keyconf->keyidx != keyidx) {
 805                 /* We need to remove a key with index different that the one
 806                  * in the uCode. This means that the key we need to remove has
 807                  * been replaced by another one with different index.
 808                  * Don't do anything and return ok
 809                  */
 810                 spin_unlock_irqrestore(&priv->sta_lock, flags);
 811                 return 0;
 812         }
 813
 814         if (priv->stations[sta_id].sta.key.key_offset == WEP_INVALID_OFFSET) {
 815                 IWL_WARNING("Removing wrong key %d 0x%x\n",
 816                             keyconf->keyidx, key_flags);
 817                 spin_unlock_irqrestore(&priv->sta_lock, flags);
 818                 return 0;
 819         }
 820
 821         if (!test_and_clear_bit(priv->stations[sta_id].sta.key.key_offset,
 822                 &priv->ucode_key_table))
 823                 IWL_ERROR("index %d not used in uCode key table.\n",
 824                         priv->stations[sta_id].sta.key.key_offset);
 825         memset(&priv->stations[sta_id].keyinfo, 0,
 826                                         sizeof(struct iwl_hw_key));
 827         memset(&priv->stations[sta_id].sta.key, 0,
 828                                         sizeof(struct iwl4965_keyinfo));
 829         priv->stations[sta_id].sta.key.key_flags =
 830                         STA_KEY_FLG_NO_ENC | STA_KEY_FLG_INVALID;
 831         priv->stations[sta_id].sta.key.key_offset = WEP_INVALID_OFFSET;
 832         priv->stations[sta_id].sta.sta.modify_mask = STA_MODIFY_KEY_MASK;
 833         priv->stations[sta_id].sta.mode = STA_CONTROL_MODIFY_MSK;
 834
 835         ret =  iwl_send_add_sta(priv, &priv->stations[sta_id].sta, CMD_ASYNC);
 836         spin_unlock_irqrestore(&priv->sta_lock, flags);
 837         return ret;
 838 }
 839 EXPORT_SYMBOL(iwl_remove_dynamic_key);
 840
 841 int iwl_set_dynamic_key(struct iwl_priv *priv,
 842                                 struct ieee80211_key_conf *keyconf, u8 sta_id)
 843 {
 844         int ret;
 845
 846         priv->key_mapping_key++;
 847         keyconf->hw_key_idx = HW_KEY_DYNAMIC;
 848
 849         switch (keyconf->alg) {
 850         case ALG_CCMP:
 851                 ret = iwl_set_ccmp_dynamic_key_info(priv, keyconf, sta_id);
 852                 break;
 853         case ALG_TKIP:
 854                 ret = iwl_set_tkip_dynamic_key_info(priv, keyconf, sta_id);
 855                 break;
 856         case ALG_WEP:
 857                 ret = iwl_set_wep_dynamic_key_info(priv, keyconf, sta_id);
 858                 break;
 859         default:
 860                 IWL_ERROR("Unknown alg: %s alg = %d\n", __func__, keyconf->alg);
 861                 ret = -EINVAL;
 862         }
 863
 864         IWL_DEBUG_WEP("Set dynamic key: alg= %d len=%d idx=%d sta=%d ret=%d\n",
 865                       keyconf->alg, keyconf->keylen, keyconf->keyidx,
 866                       sta_id, ret);
 867
 868         return ret;
 869 }
 870 EXPORT_SYMBOL(iwl_set_dynamic_key);
 871
 872 #ifdef CONFIG_IWLWIFI_DEBUG
 873 static void iwl_dump_lq_cmd(struct iwl_priv *priv,
 874                            struct iwl_link_quality_cmd *lq)
 875 {
 876         int i;
 877         IWL_DEBUG_RATE("lq station id 0x%x\n", lq->sta_id);
 878         IWL_DEBUG_RATE("lq ant 0x%X 0x%X\n",
 879                        lq->general_params.single_stream_ant_msk,
 880                        lq->general_params.dual_stream_ant_msk);
 881
 882         for (i = 0; i < LINK_QUAL_MAX_RETRY_NUM; i++)
 883                 IWL_DEBUG_RATE("lq index %d 0x%X\n",
 884                                i, lq->rs_table[i].rate_n_flags);
 885 }
 886 #else
 887 static inline void iwl_dump_lq_cmd(struct iwl_priv *priv,
 888                                    struct iwl_link_quality_cmd *lq)
 889 {
 890 }
 891 #endif
 892
 893 int iwl_send_lq_cmd(struct iwl_priv *priv,
 894                     struct iwl_link_quality_cmd *lq, u8 flags)
 895 {
 896         struct iwl_host_cmd cmd = {
 897                 .id = REPLY_TX_LINK_QUALITY_CMD,
 898                 .len = sizeof(struct iwl_link_quality_cmd),
 899                 .meta.flags = flags,
 900                 .data = lq,
 901         };
 902
 903         if ((lq->sta_id == 0xFF) &&
 904             (priv->iw_mode == NL80211_IFTYPE_ADHOC))
 905                 return -EINVAL;
 906
 907         if (lq->sta_id == 0xFF)
 908                 lq->sta_id = IWL_AP_ID;
 909
 910         iwl_dump_lq_cmd(priv, lq);
 911
 912         if (iwl_is_associated(priv) && priv->assoc_station_added)
 913                 return  iwl_send_cmd(priv, &cmd);
 914
 915         return 0;
 916 }
 917 EXPORT_SYMBOL(iwl_send_lq_cmd);
 918
 919 /**
 920  * iwl_sta_init_lq - Initialize a station's hardware rate table
 921  *
 922  * The uCode's station table contains a table of fallback rates
 923  * for automatic fallback during transmission.
 924  *
 925  * NOTE: This sets up a default set of values.  These will be replaced later
 926  *       if the driver's iwl-agn-rs rate scaling algorithm is used, instead of
 927  *       rc80211_simple.
 928  *
 929  * NOTE: Run REPLY_ADD_STA command to set up station table entry, before
 930  *       calling this function (which runs REPLY_TX_LINK_QUALITY_CMD,
 931  *       which requires station table entry to exist).
 932  */
 933 static void iwl_sta_init_lq(struct iwl_priv *priv, const u8 *addr, int is_ap)
 934 {
 935         int i, r;
 936         struct iwl_link_quality_cmd link_cmd = {
 937                 .reserved1 = 0,
 938         };
 939         u32 rate_flags;
 940
 941         /* Set up the rate scaling to start at selected rate, fall back
 942          * all the way down to 1M in IEEE order, and then spin on 1M */
 943         if (is_ap)
 944                 r = IWL_RATE_54M_INDEX;
 945         else if (priv->band == IEEE80211_BAND_5GHZ)
 946                 r = IWL_RATE_6M_INDEX;
 947         else
 948                 r = IWL_RATE_1M_INDEX;
 949
 950         for (i = 0; i < LINK_QUAL_MAX_RETRY_NUM; i++) {
 951                 rate_flags = 0;
 952                 if (r >= IWL_FIRST_CCK_RATE && r <= IWL_LAST_CCK_RATE)
 953                         rate_flags |= RATE_MCS_CCK_MSK;
 954
 955                 rate_flags |= first_antenna(priv->hw_params.valid_tx_ant) <<
 956                                 RATE_MCS_ANT_POS;
 957
 958                 link_cmd.rs_table[i].rate_n_flags =
 959                         iwl_hw_set_rate_n_flags(iwl_rates[r].plcp, rate_flags);
 960                 r = iwl_get_prev_ieee_rate(r);
 961         }
 962
 963         link_cmd.general_params.single_stream_ant_msk =
 964                                 first_antenna(priv->hw_params.valid_tx_ant);
 965         link_cmd.general_params.dual_stream_ant_msk = 3;
 966         link_cmd.agg_params.agg_dis_start_th = 3;
 967         link_cmd.agg_params.agg_time_limit = cpu_to_le16(4000);
 968
 969         /* Update the rate scaling for control frame Tx to AP */
 970         link_cmd.sta_id = is_ap ? IWL_AP_ID : priv->hw_params.bcast_sta_id;
 971
 972         iwl_send_cmd_pdu_async(priv, REPLY_TX_LINK_QUALITY_CMD,
 973                                sizeof(link_cmd), &link_cmd, NULL);
 974 }
 975
 976 /**
 977  * iwl_rxon_add_station - add station into station table.
 978  *
 979  * there is only one AP station with id= IWL_AP_ID
 980  * NOTE: mutex must be held before calling this function
 981  */
 982 int iwl_rxon_add_station(struct iwl_priv *priv, const u8 *addr, int is_ap)
 983 {
 984         struct ieee80211_sta *sta;
 985         struct ieee80211_sta_ht_cap ht_config;
 986         struct ieee80211_sta_ht_cap *cur_ht_config = NULL;
 987         u8 sta_id;
 988
 989         /* Add station to device's station table */
 990
 991         /*
 992          * XXX: This check is definitely not correct, if we're an AP
 993          *      it'll always be false which is not what we want, but
 994          *      it doesn't look like iwlagn is prepared to be an HT
 995          *      AP anyway.
 996          */
 997         if (priv->current_ht_config.is_ht) {
 998                 rcu_read_lock();
 999                 sta = ieee80211_find_sta(priv->hw, addr);
1000                 if (sta) {
1001                         memcpy(&ht_config, &sta->ht_cap, sizeof(ht_config));
1002                         cur_ht_config = &ht_config;
1003                 }
1004                 rcu_read_unlock();
1005         }
1006
1007         sta_id = iwl_add_station_flags(priv, addr, is_ap,
1008                                        0, cur_ht_config);
1009
1010         /* Set up default rate scaling table in device's station table */
1011         iwl_sta_init_lq(priv, addr, is_ap);
1012
1013         return sta_id;
1014 }
1015 EXPORT_SYMBOL(iwl_rxon_add_station);
1016
1017 /**
1018  * iwl_get_sta_id - Find station's index within station table
1019  *
1020  * If new IBSS station, create new entry in station table
1021  */
1022 int iwl_get_sta_id(struct iwl_priv *priv, struct ieee80211_hdr *hdr)
1023 {
1024         int sta_id;
1025         u16 fc = le16_to_cpu(hdr->frame_control);
1026
1027         /* If this frame is broadcast or management, use broadcast station id */
1028         if (((fc & IEEE80211_FCTL_FTYPE) != IEEE80211_FTYPE_DATA) ||
1029             is_multicast_ether_addr(hdr->addr1))
1030                 return priv->hw_params.bcast_sta_id;
1031
1032         switch (priv->iw_mode) {
1033
1034         /* If we are a client station in a BSS network, use the special
1035          * AP station entry (that's the only station we communicate with) */
1036         case NL80211_IFTYPE_STATION:
1037                 return IWL_AP_ID;
1038
1039         /* If we are an AP, then find the station, or use BCAST */
1040         case NL80211_IFTYPE_AP:
1041                 sta_id = iwl_find_station(priv, hdr->addr1);
1042                 if (sta_id != IWL_INVALID_STATION)
1043                         return sta_id;
1044                 return priv->hw_params.bcast_sta_id;
1045
1046         /* If this frame is going out to an IBSS network, find the station,
1047          * or create a new station table entry */
1048         case NL80211_IFTYPE_ADHOC:
1049                 sta_id = iwl_find_station(priv, hdr->addr1);
1050                 if (sta_id != IWL_INVALID_STATION)
1051                         return sta_id;
1052
1053                 /* Create new station table entry */
1054                 sta_id = iwl_add_station_flags(priv, hdr->addr1,
1055                                                    0, CMD_ASYNC, NULL);
1056
1057                 if (sta_id != IWL_INVALID_STATION)
1058                         return sta_id;
1059
1060                 IWL_DEBUG_DROP("Station %pM not in station map. "
1061                                "Defaulting to broadcast...\n",
1062                                hdr->addr1);
1063                 iwl_print_hex_dump(priv, IWL_DL_DROP, (u8 *) hdr, sizeof(*hdr));
1064                 return priv->hw_params.bcast_sta_id;
1065
1066         /* If we are in monitor mode, use BCAST. This is required for
1067          * packet injection. */
1068         case NL80211_IFTYPE_MONITOR:
1069                 return priv->hw_params.bcast_sta_id;
1070
1071         default:
1072                 IWL_WARNING("Unknown mode of operation: %d\n", priv->iw_mode);
1073                 return priv->hw_params.bcast_sta_id;
1074         }
1075 }
1076 EXPORT_SYMBOL(iwl_get_sta_id);
1077
1078 /**
1079  * iwl_sta_tx_modify_enable_tid - Enable Tx for this TID in station table
1080  */
1081 void iwl_sta_tx_modify_enable_tid(struct iwl_priv *priv, int sta_id, int tid)
1082 {
1083         unsigned long flags;
1084
1085         /* Remove "disable" flag, to enable Tx for this TID */
1086         spin_lock_irqsave(&priv->sta_lock, flags);
1087         priv->stations[sta_id].sta.sta.modify_mask = STA_MODIFY_TID_DISABLE_TX;
1088         priv->stations[sta_id].sta.tid_disable_tx &= cpu_to_le16(~(1 << tid));
1089         priv->stations[sta_id].sta.mode = STA_CONTROL_MODIFY_MSK;
1090         spin_unlock_irqrestore(&priv->sta_lock, flags);
1091
1092         iwl_send_add_sta(priv, &priv->stations[sta_id].sta, CMD_ASYNC);
1093 }
1094 EXPORT_SYMBOL(iwl_sta_tx_modify_enable_tid);
1095
1096 int iwl_sta_rx_agg_start(struct iwl_priv *priv,
1097                          const u8 *addr, int tid, u16 ssn)
1098 {
1099         unsigned long flags;
1100         int sta_id;
1101
1102         sta_id = iwl_find_station(priv, addr);
1103         if (sta_id == IWL_INVALID_STATION)
1104                 return -ENXIO;
1105
1106         spin_lock_irqsave(&priv->sta_lock, flags);
1107         priv->stations[sta_id].sta.station_flags_msk = 0;
1108         priv->stations[sta_id].sta.sta.modify_mask = STA_MODIFY_ADDBA_TID_MSK;
1109         priv->stations[sta_id].sta.add_immediate_ba_tid = (u8)tid;
1110         priv->stations[sta_id].sta.add_immediate_ba_ssn = cpu_to_le16(ssn);
1111         priv->stations[sta_id].sta.mode = STA_CONTROL_MODIFY_MSK;
1112         spin_unlock_irqrestore(&priv->sta_lock, flags);
1113
1114         return iwl_send_add_sta(priv, &priv->stations[sta_id].sta,
1115                                         CMD_ASYNC);
1116 }
1117 EXPORT_SYMBOL(iwl_sta_rx_agg_start);
1118
1119 int iwl_sta_rx_agg_stop(struct iwl_priv *priv, const u8 *addr, int tid)
1120 {
1121         unsigned long flags;
1122         int sta_id;
1123
1124         sta_id = iwl_find_station(priv, addr);
1125         if (sta_id == IWL_INVALID_STATION)
1126                 return -ENXIO;
1127
1128         spin_lock_irqsave(&priv->sta_lock, flags);
1129         priv->stations[sta_id].sta.station_flags_msk = 0;
1130         priv->stations[sta_id].sta.sta.modify_mask = STA_MODIFY_DELBA_TID_MSK;
1131         priv->stations[sta_id].sta.remove_immediate_ba_tid = (u8)tid;
1132         priv->stations[sta_id].sta.mode = STA_CONTROL_MODIFY_MSK;
1133         spin_unlock_irqrestore(&priv->sta_lock, flags);
1134
1135         return iwl_send_add_sta(priv, &priv->stations[sta_id].sta,
1136                                         CMD_ASYNC);
1137 }
1138 EXPORT_SYMBOL(iwl_sta_rx_agg_stop);
1139
1140 static void iwl_sta_modify_ps_wake(struct iwl_priv *priv, int sta_id)
1141 {
1142         unsigned long flags;
1143
1144         spin_lock_irqsave(&priv->sta_lock, flags);
1145         priv->stations[sta_id].sta.station_flags &= ~STA_FLG_PWR_SAVE_MSK;
1146         priv->stations[sta_id].sta.station_flags_msk = STA_FLG_PWR_SAVE_MSK;
1147         priv->stations[sta_id].sta.sta.modify_mask = 0;
1148         priv->stations[sta_id].sta.mode = STA_CONTROL_MODIFY_MSK;
1149         spin_unlock_irqrestore(&priv->sta_lock, flags);
1150
1151         iwl_send_add_sta(priv, &priv->stations[sta_id].sta, CMD_ASYNC);
1152 }
1153
1154 void iwl_update_ps_mode(struct iwl_priv *priv, u16 ps_bit, u8 *addr)
1155 {
1156         /* FIXME: need locking over ps_status ??? */
1157         u8 sta_id = iwl_find_station(priv, addr);
1158
1159         if (sta_id != IWL_INVALID_STATION) {
1160                 u8 sta_awake = priv->stations[sta_id].
1161                                 ps_status == STA_PS_STATUS_WAKE;
1162
1163                 if (sta_awake && ps_bit)
1164                         priv->stations[sta_id].ps_status = STA_PS_STATUS_SLEEP;
1165                 else if (!sta_awake && !ps_bit) {
1166                         iwl_sta_modify_ps_wake(priv, sta_id);
1167                         priv->stations[sta_id].ps_status = STA_PS_STATUS_WAKE;
1168                 }
1169         }
1170 }
1171