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

   1 /******************************************************************************
   2  *
   3  * Copyright(c) 2003 - 2008 Intel Corporation. All rights reserved.
   4  *
   5  * Portions of this file are derived from the ipw3945 project, as well
   6  * as portions of the ieee80211 subsystem header files.
   7  *
   8  * This program is free software; you can redistribute it and/or modify it
   9  * under the terms of version 2 of the GNU General Public License as
  10  * published by the Free Software Foundation.
  11  *
  12  * This program is distributed in the hope that it will be useful, but WITHOUT
  13  * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
  14  * FITNESS FOR A PARTICULAR PURPOSE.  See the GNU General Public License for
  15  * more details.
  16  *
  17  * You should have received a copy of the GNU General Public License along with
  18  * this program; if not, write to the Free Software Foundation, Inc.,
  19  * 51 Franklin Street, Fifth Floor, Boston, MA 02110, USA
  20  *
  21  * The full GNU General Public License is included in this distribution in the
  22  * file called LICENSE.
  23  *
  24  * Contact Information:
  25  * James P. Ketrenos <ipw2100-admin@linux.intel.com>
  26  * Intel Corporation, 5200 N.E. Elam Young Parkway, Hillsboro, OR 97124-6497
  27  *
  28  *****************************************************************************/
  29
  30 #include <net/mac80211.h>
  31 #include <linux/etherdevice.h>
  32
  33 #include "iwl-dev.h"
  34 #include "iwl-core.h"
  35 #include "iwl-sta.h"
  36 #include "iwl-helpers.h"
  37
  38
  39 #define IWL_STA_DRIVER_ACTIVE BIT(0) /* driver entry is active */
  40 #define IWL_STA_UCODE_ACTIVE  BIT(1) /* ucode entry is active */
  41
  42 u8 iwl_find_station(struct iwl_priv *priv, const u8 *addr)
  43 {
  44         int i;
  45         int start = 0;
  46         int ret = IWL_INVALID_STATION;
  47         unsigned long flags;
  48
  49         if ((priv->iw_mode == NL80211_IFTYPE_ADHOC) ||
  50             (priv->iw_mode == NL80211_IFTYPE_AP))
  51                 start = IWL_STA_ID;
  52
  53         if (is_broadcast_ether_addr(addr))
  54                 return priv->hw_params.bcast_sta_id;
  55
  56         spin_lock_irqsave(&priv->sta_lock, flags);
  57         for (i = start; i < priv->hw_params.max_stations; i++)
  58                 if (priv->stations[i].used &&
  59                     (!compare_ether_addr(priv->stations[i].sta.sta.addr,
  60                                          addr))) {
  61                         ret = i;
  62                         goto out;
  63                 }
  64
  65         IWL_DEBUG_ASSOC_LIMIT("can not find STA %pM total %d\n",
  66                               addr, priv->num_stations);
  67
  68  out:
  69         spin_unlock_irqrestore(&priv->sta_lock, flags);
  70         return ret;
  71 }
  72 EXPORT_SYMBOL(iwl_find_station);
  73
  74 int iwl_get_ra_sta_id(struct iwl_priv *priv, struct ieee80211_hdr *hdr)
  75 {
  76         if (priv->iw_mode == NL80211_IFTYPE_STATION) {
  77                 return IWL_AP_ID;
  78         } else {
  79                 u8 *da = ieee80211_get_DA(hdr);
  80                 return iwl_find_station(priv, da);
  81         }
  82 }
  83 EXPORT_SYMBOL(iwl_get_ra_sta_id);
  84
  85 static void iwl_sta_ucode_activate(struct iwl_priv *priv, u8 sta_id)
  86 {
  87         unsigned long flags;
  88
  89         spin_lock_irqsave(&priv->sta_lock, flags);
  90
  91         if (!(priv->stations[sta_id].used & IWL_STA_DRIVER_ACTIVE))
  92                 IWL_ERROR("ACTIVATE a non DRIVER active station %d\n", sta_id);
  93
  94         priv->stations[sta_id].used |= IWL_STA_UCODE_ACTIVE;
  95         IWL_DEBUG_ASSOC("Added STA to Ucode: %pM\n",
  96                         priv->stations[sta_id].sta.sta.addr);
  97
  98         spin_unlock_irqrestore(&priv->sta_lock, flags);
  99 }
 100
 101 static int iwl_add_sta_callback(struct iwl_priv *priv,
 102                                    struct iwl_cmd *cmd, struct sk_buff *skb)
 103 {
 104         struct iwl_rx_packet *res = NULL;
 105         struct iwl_addsta_cmd *addsta =
 106                 (struct iwl_addsta_cmd *)cmd->cmd.payload;
 107         u8 sta_id = addsta->sta.sta_id;
 108
 109         if (!skb) {
 110                 IWL_ERROR("Error: Response NULL in REPLY_ADD_STA.\n");
 111                 return 1;
 112         }
 113
 114         res = (struct iwl_rx_packet *)skb->data;
 115         if (res->hdr.flags & IWL_CMD_FAILED_MSK) {
 116                 IWL_ERROR("Bad return from REPLY_ADD_STA (0x%08X)\n",
 117                           res->hdr.flags);
 118                 return 1;
 119         }
 120
 121         switch (res->u.add_sta.status) {
 122         case ADD_STA_SUCCESS_MSK:
 123                 iwl_sta_ucode_activate(priv, sta_id);
 124                  /* fall through */
 125         default:
 126                 IWL_DEBUG_HC("Received REPLY_ADD_STA:(0x%08X)\n",
 127                              res->u.add_sta.status);
 128                 break;
 129         }
 130
 131         /* We didn't cache the SKB; let the caller free it */
 132         return 1;
 133 }
 134
 135 static int iwl_send_add_sta(struct iwl_priv *priv,
 136                      struct iwl_addsta_cmd *sta, u8 flags)
 137 {
 138         struct iwl_rx_packet *res = NULL;
 139         int ret = 0;
 140         u8 data[sizeof(*sta)];
 141         struct iwl_host_cmd cmd = {
 142                 .id = REPLY_ADD_STA,
 143                 .meta.flags = flags,
 144                 .data = data,
 145         };
 146
 147         if (flags & CMD_ASYNC)
 148                 cmd.meta.u.callback = iwl_add_sta_callback;
 149         else
 150                 cmd.meta.flags |= CMD_WANT_SKB;
 151
 152         cmd.len = priv->cfg->ops->utils->build_addsta_hcmd(sta, data);
 153         ret = iwl_send_cmd(priv, &cmd);
 154
 155         if (ret || (flags & CMD_ASYNC))
 156                 return ret;
 157
 158         res = (struct iwl_rx_packet *)cmd.meta.u.skb->data;
 159         if (res->hdr.flags & IWL_CMD_FAILED_MSK) {
 160                 IWL_ERROR("Bad return from REPLY_ADD_STA (0x%08X)\n",
 161                           res->hdr.flags);
 162                 ret = -EIO;
 163         }
 164
 165         if (ret == 0) {
 166                 switch (res->u.add_sta.status) {
 167                 case ADD_STA_SUCCESS_MSK:
 168                         iwl_sta_ucode_activate(priv, sta->sta.sta_id);
 169                         IWL_DEBUG_INFO("REPLY_ADD_STA PASSED\n");
 170                         break;
 171                 default:
 172                         ret = -EIO;
 173                         IWL_WARNING("REPLY_ADD_STA failed\n");
 174                         break;
 175                 }
 176         }
 177
 178         priv->alloc_rxb_skb--;
 179         dev_kfree_skb_any(cmd.meta.u.skb);
 180
 181         return ret;
 182 }
 183
 184 static void iwl_set_ht_add_station(struct iwl_priv *priv, u8 index,
 185                                    struct ieee80211_sta_ht_cap *sta_ht_inf)
 186 {
 187         __le32 sta_flags;
 188         u8 mimo_ps_mode;
 189
 190         if (!sta_ht_inf || !sta_ht_inf->ht_supported)
 191                 goto done;
 192
 193         mimo_ps_mode = (sta_ht_inf->cap & IEEE80211_HT_CAP_SM_PS) >> 2;
 194
 195         sta_flags = priv->stations[index].sta.station_flags;
 196
 197         sta_flags &= ~(STA_FLG_RTS_MIMO_PROT_MSK | STA_FLG_MIMO_DIS_MSK);
 198
 199         switch (mimo_ps_mode) {
 200         case WLAN_HT_CAP_SM_PS_STATIC:
 201                 sta_flags |= STA_FLG_MIMO_DIS_MSK;
 202                 break;
 203         case WLAN_HT_CAP_SM_PS_DYNAMIC:
 204                 sta_flags |= STA_FLG_RTS_MIMO_PROT_MSK;
 205                 break;
 206         case WLAN_HT_CAP_SM_PS_DISABLED:
 207                 break;
 208         default:
 209                 IWL_WARNING("Invalid MIMO PS mode %d\n", mimo_ps_mode);
 210                 break;
 211         }
 212
 213         sta_flags |= cpu_to_le32(
 214               (u32)sta_ht_inf->ampdu_factor << STA_FLG_MAX_AGG_SIZE_POS);
 215
 216         sta_flags |= cpu_to_le32(
 217               (u32)sta_ht_inf->ampdu_density << STA_FLG_AGG_MPDU_DENSITY_POS);
 218
 219         if (iwl_is_fat_tx_allowed(priv, sta_ht_inf))
 220                 sta_flags |= STA_FLG_FAT_EN_MSK;
 221         else
 222                 sta_flags &= ~STA_FLG_FAT_EN_MSK;
 223
 224         priv->stations[index].sta.station_flags = sta_flags;
 225  done:
 226         return;
 227 }
 228
 229 /**
 230  * iwl_add_station_flags - Add station to tables in driver and device
 231  */
 232 u8 iwl_add_station_flags(struct iwl_priv *priv, const u8 *addr, int is_ap,
 233                          u8 flags, struct ieee80211_sta_ht_cap *ht_info)
 234 {
 235         int i;
 236         int sta_id = IWL_INVALID_STATION;
 237         struct iwl_station_entry *station;
 238         unsigned long flags_spin;
 239
 240         spin_lock_irqsave(&priv->sta_lock, flags_spin);
 241         if (is_ap)
 242                 sta_id = IWL_AP_ID;
 243         else if (is_broadcast_ether_addr(addr))
 244                 sta_id = priv->hw_params.bcast_sta_id;
 245         else
 246                 for (i = IWL_STA_ID; i < priv->hw_params.max_stations; i++) {
 247                         if (!compare_ether_addr(priv->stations[i].sta.sta.addr,
 248                                                 addr)) {
 249                                 sta_id = i;
 250                                 break;
 251                         }
 252
 253                         if (!priv->stations[i].used &&
 254                             sta_id == IWL_INVALID_STATION)
 255                                 sta_id = i;
 256                 }
 257
 258         /* These two conditions have the same outcome, but keep them separate
 259            since they have different meanings */
 260         if (unlikely(sta_id == IWL_INVALID_STATION)) {
 261                 spin_unlock_irqrestore(&priv->sta_lock, flags_spin);
 262                 return sta_id;
 263         }
 264
 265         if (priv->stations[sta_id].used &&
 266             !compare_ether_addr(priv->stations[sta_id].sta.sta.addr, addr)) {
 267                 spin_unlock_irqrestore(&priv->sta_lock, flags_spin);
 268                 return sta_id;
 269         }
 270
 271
 272         station = &priv->stations[sta_id];
 273         station->used = IWL_STA_DRIVER_ACTIVE;
 274         IWL_DEBUG_ASSOC("Add STA to driver ID %d: %pM\n",
 275                         sta_id, addr);
 276         priv->num_stations++;
 277
 278         /* Set up the REPLY_ADD_STA command to send to device */
 279         memset(&station->sta, 0, sizeof(struct iwl_addsta_cmd));
 280         memcpy(station->sta.sta.addr, addr, ETH_ALEN);
 281         station->sta.mode = 0;
 282         station->sta.sta.sta_id = sta_id;
 283         station->sta.station_flags = 0;
 284
 285         /* BCAST station and IBSS stations do not work in HT mode */
 286         if (sta_id != priv->hw_params.bcast_sta_id &&
 287             priv->iw_mode != NL80211_IFTYPE_ADHOC)
 288                 iwl_set_ht_add_station(priv, sta_id, ht_info);
 289
 290         spin_unlock_irqrestore(&priv->sta_lock, flags_spin);
 291
 292         /* Add station to device's station table */
 293         iwl_send_add_sta(priv, &station->sta, flags);
 294         return sta_id;
 295
 296 }
 297 EXPORT_SYMBOL(iwl_add_station_flags);
 298
 299 static void iwl_sta_ucode_deactivate(struct iwl_priv *priv, const char *addr)
 300 {
 301         unsigned long flags;
 302         u8 sta_id = iwl_find_station(priv, addr);
 303
 304         BUG_ON(sta_id == IWL_INVALID_STATION);
 305
 306         IWL_DEBUG_ASSOC("Removed STA from Ucode: %pM\n", addr);
 307
 308         spin_lock_irqsave(&priv->sta_lock, flags);
 309
 310         /* Ucode must be active and driver must be non active */
 311         if (priv->stations[sta_id].used != IWL_STA_UCODE_ACTIVE)
 312                 IWL_ERROR("removed non active STA %d\n", sta_id);
 313
 314         priv->stations[sta_id].used &= ~IWL_STA_UCODE_ACTIVE;
 315
 316         memset(&priv->stations[sta_id], 0, sizeof(struct iwl_station_entry));
 317         spin_unlock_irqrestore(&priv->sta_lock, flags);
 318 }
 319
 320 static int iwl_remove_sta_callback(struct iwl_priv *priv,
 321                                    struct iwl_cmd *cmd, struct sk_buff *skb)
 322 {
 323         struct iwl_rx_packet *res = NULL;
 324         struct iwl_rem_sta_cmd *rm_sta =
 325                  (struct iwl_rem_sta_cmd *)cmd->cmd.payload;
 326         const char *addr = rm_sta->addr;
 327
 328         if (!skb) {
 329                 IWL_ERROR("Error: Response NULL in REPLY_REMOVE_STA.\n");
 330                 return 1;
 331         }
 332
 333         res = (struct iwl_rx_packet *)skb->data;
 334         if (res->hdr.flags & IWL_CMD_FAILED_MSK) {
 335                 IWL_ERROR("Bad return from REPLY_REMOVE_STA (0x%08X)\n",
 336                 res->hdr.flags);
 337                 return 1;
 338         }
 339
 340         switch (res->u.rem_sta.status) {
 341         case REM_STA_SUCCESS_MSK:
 342                 iwl_sta_ucode_deactivate(priv, addr);
 343                 break;
 344         default:
 345                 IWL_ERROR("REPLY_REMOVE_STA failed\n");
 346                 break;
 347         }
 348
 349         /* We didn't cache the SKB; let the caller free it */
 350         return 1;
 351 }
 352
 353 static int iwl_send_remove_station(struct iwl_priv *priv, const u8 *addr,
 354                                    u8 flags)
 355 {
 356         struct iwl_rx_packet *res = NULL;
 357         int ret;
 358
 359         struct iwl_rem_sta_cmd rm_sta_cmd;
 360
 361         struct iwl_host_cmd cmd = {
 362                 .id = REPLY_REMOVE_STA,
 363                 .len = sizeof(struct iwl_rem_sta_cmd),
 364                 .meta.flags = flags,
 365                 .data = &rm_sta_cmd,
 366         };
 367
 368         memset(&rm_sta_cmd, 0, sizeof(rm_sta_cmd));
 369         rm_sta_cmd.num_sta = 1;
 370         memcpy(&rm_sta_cmd.addr, addr , ETH_ALEN);
 371
 372         if (flags & CMD_ASYNC)
 373                 cmd.meta.u.callback = iwl_remove_sta_callback;
 374         else
 375                 cmd.meta.flags |= CMD_WANT_SKB;
 376         ret = iwl_send_cmd(priv, &cmd);
 377
 378         if (ret || (flags & CMD_ASYNC))
 379                 return ret;
 380
 381         res = (struct iwl_rx_packet *)cmd.meta.u.skb->data;
 382         if (res->hdr.flags & IWL_CMD_FAILED_MSK) {
 383                 IWL_ERROR("Bad return from REPLY_REMOVE_STA (0x%08X)\n",
 384                           res->hdr.flags);
 385                 ret = -EIO;
 386         }
 387
 388         if (!ret) {
 389                 switch (res->u.rem_sta.status) {
 390                 case REM_STA_SUCCESS_MSK:
 391                         iwl_sta_ucode_deactivate(priv, addr);
 392                         IWL_DEBUG_ASSOC("REPLY_REMOVE_STA PASSED\n");
 393                         break;
 394                 default:
 395                         ret = -EIO;
 396                         IWL_ERROR("REPLY_REMOVE_STA failed\n");
 397                         break;
 398                 }
 399         }
 400
 401         priv->alloc_rxb_skb--;
 402         dev_kfree_skb_any(cmd.meta.u.skb);
 403
 404         return ret;
 405 }
 406
 407 /**
 408  * iwl_remove_station - Remove driver's knowledge of station.
 409  */
 410 int iwl_remove_station(struct iwl_priv *priv, const u8 *addr, int is_ap)
 411 {
 412         int sta_id = IWL_INVALID_STATION;
 413         int i, ret = -EINVAL;
 414         unsigned long flags;
 415
 416         spin_lock_irqsave(&priv->sta_lock, flags);
 417
 418         if (is_ap)
 419                 sta_id = IWL_AP_ID;
 420         else if (is_broadcast_ether_addr(addr))
 421                 sta_id = priv->hw_params.bcast_sta_id;
 422         else
 423                 for (i = IWL_STA_ID; i < priv->hw_params.max_stations; i++)
 424                         if (priv->stations[i].used &&
 425                             !compare_ether_addr(priv->stations[i].sta.sta.addr,
 426                                                 addr)) {
 427                                 sta_id = i;
 428                                 break;
 429                         }
 430
 431         if (unlikely(sta_id == IWL_INVALID_STATION))
 432                 goto out;
 433
 434         IWL_DEBUG_ASSOC("Removing STA from driver:%d  %pM\n",
 435                 sta_id, addr);
 436
 437         if (!(priv->stations[sta_id].used & IWL_STA_DRIVER_ACTIVE)) {
 438                 IWL_ERROR("Removing %pM but non DRIVER active\n",
 439                                 addr);
 440                 goto out;
 441         }
 442
 443         if (!(priv->stations[sta_id].used & IWL_STA_UCODE_ACTIVE)) {
 444                 IWL_ERROR("Removing %pM but non UCODE active\n",
 445                                 addr);
 446                 goto out;
 447         }
 448
 449
 450         priv->stations[sta_id].used &= ~IWL_STA_DRIVER_ACTIVE;
 451
 452         priv->num_stations--;
 453
 454         BUG_ON(priv->num_stations < 0);
 455
 456         spin_unlock_irqrestore(&priv->sta_lock, flags);
 457
 458         ret = iwl_send_remove_station(priv, addr, CMD_ASYNC);
 459         return ret;
 460 out:
 461         spin_unlock_irqrestore(&priv->sta_lock, flags);
 462         return ret;
 463 }
 464 EXPORT_SYMBOL(iwl_remove_station);
 465
 466 /**
 467  * iwl_clear_stations_table - Clear the driver's station table
 468  *
 469  * NOTE:  This does not clear or otherwise alter the device's station table.
 470  */
 471 void iwl_clear_stations_table(struct iwl_priv *priv)
 472 {
 473         unsigned long flags;
 474
 475         spin_lock_irqsave(&priv->sta_lock, flags);
 476
 477         if (iwl_is_alive(priv) &&
 478            !test_bit(STATUS_EXIT_PENDING, &priv->status) &&
 479            iwl_send_cmd_pdu_async(priv, REPLY_REMOVE_ALL_STA, 0, NULL, NULL))
 480                 IWL_ERROR("Couldn't clear the station table\n");
 481
 482         priv->num_stations = 0;
 483         memset(priv->stations, 0, sizeof(priv->stations));
 484
 485         spin_unlock_irqrestore(&priv->sta_lock, flags);
 486 }
 487 EXPORT_SYMBOL(iwl_clear_stations_table);
 488
 489 static int iwl_get_free_ucode_key_index(struct iwl_priv *priv)
 490 {
 491         int i;
 492
 493         for (i = 0; i < STA_KEY_MAX_NUM; i++)
 494                 if (!test_and_set_bit(i, &priv->ucode_key_table))
 495                         return i;
 496
 497         return WEP_INVALID_OFFSET;
 498 }
 499
 500 int iwl_send_static_wepkey_cmd(struct iwl_priv *priv, u8 send_if_empty)
 501 {
 502         int i, not_empty = 0;
 503         u8 buff[sizeof(struct iwl_wep_cmd) +
 504                 sizeof(struct iwl_wep_key) * WEP_KEYS_MAX];
 505         struct iwl_wep_cmd *wep_cmd = (struct iwl_wep_cmd *)buff;
 506         size_t cmd_size  = sizeof(struct iwl_wep_cmd);
 507         struct iwl_host_cmd cmd = {
 508                 .id = REPLY_WEPKEY,
 509                 .data = wep_cmd,
 510                 .meta.flags = CMD_ASYNC,
 511         };
 512
 513         memset(wep_cmd, 0, cmd_size +
 514                         (sizeof(struct iwl_wep_key) * WEP_KEYS_MAX));
 515
 516         for (i = 0; i < WEP_KEYS_MAX ; i++) {
 517                 wep_cmd->key[i].key_index = i;
 518                 if (priv->wep_keys[i].key_size) {
 519                         wep_cmd->key[i].key_offset = i;
 520                         not_empty = 1;
 521                 } else {
 522                         wep_cmd->key[i].key_offset = WEP_INVALID_OFFSET;
 523                 }
 524
 525                 wep_cmd->key[i].key_size = priv->wep_keys[i].key_size;
 526                 memcpy(&wep_cmd->key[i].key[3], priv->wep_keys[i].key,
 527                                 priv->wep_keys[i].key_size);
 528         }
 529
 530         wep_cmd->global_key_type = WEP_KEY_WEP_TYPE;
 531         wep_cmd->num_keys = WEP_KEYS_MAX;
 532
 533         cmd_size += sizeof(struct iwl_wep_key) * WEP_KEYS_MAX;
 534
 535         cmd.len = cmd_size;
 536
 537         if (not_empty || send_if_empty)
 538                 return iwl_send_cmd(priv, &cmd);
 539         else
 540                 return 0;
 541 }
 542 EXPORT_SYMBOL(iwl_send_static_wepkey_cmd);
 543
 544 int iwl_remove_default_wep_key(struct iwl_priv *priv,
 545                                struct ieee80211_key_conf *keyconf)
 546 {
 547         int ret;
 548         unsigned long flags;
 549
 550         spin_lock_irqsave(&priv->sta_lock, flags);
 551
 552         if (!test_and_clear_bit(keyconf->keyidx, &priv->ucode_key_table))
 553                 IWL_ERROR("index %d not used in uCode key table.\n",
 554                           keyconf->keyidx);
 555
 556         priv->default_wep_key--;
 557         memset(&priv->wep_keys[keyconf->keyidx], 0, sizeof(priv->wep_keys[0]));
 558         ret = iwl_send_static_wepkey_cmd(priv, 1);
 559         IWL_DEBUG_WEP("Remove default WEP key: idx=%d ret=%d\n",
 560                       keyconf->keyidx, ret);
 561         spin_unlock_irqrestore(&priv->sta_lock, flags);
 562
 563         return ret;
 564 }
 565 EXPORT_SYMBOL(iwl_remove_default_wep_key);
 566
 567 int iwl_set_default_wep_key(struct iwl_priv *priv,
 568                             struct ieee80211_key_conf *keyconf)
 569 {
 570         int ret;
 571         unsigned long flags;
 572
 573         if (keyconf->keylen != WEP_KEY_LEN_128 &&
 574             keyconf->keylen != WEP_KEY_LEN_64) {
 575                 IWL_DEBUG_WEP("Bad WEP key length %d\n", keyconf->keylen);
 576                 return -EINVAL;
 577         }
 578
 579         keyconf->flags &= ~IEEE80211_KEY_FLAG_GENERATE_IV;
 580         keyconf->hw_key_idx = HW_KEY_DEFAULT;
 581         priv->stations[IWL_AP_ID].keyinfo.alg = ALG_WEP;
 582
 583         spin_lock_irqsave(&priv->sta_lock, flags);
 584         priv->default_wep_key++;
 585
 586         if (test_and_set_bit(keyconf->keyidx, &priv->ucode_key_table))
 587                 IWL_ERROR("index %d already used in uCode key table.\n",
 588                         keyconf->keyidx);
 589
 590         priv->wep_keys[keyconf->keyidx].key_size = keyconf->keylen;
 591         memcpy(&priv->wep_keys[keyconf->keyidx].key, &keyconf->key,
 592                                                         keyconf->keylen);
 593
 594         ret = iwl_send_static_wepkey_cmd(priv, 0);
 595         IWL_DEBUG_WEP("Set default WEP key: len=%d idx=%d ret=%d\n",
 596                 keyconf->keylen, keyconf->keyidx, ret);
 597         spin_unlock_irqrestore(&priv->sta_lock, flags);
 598
 599         return ret;
 600 }
 601 EXPORT_SYMBOL(iwl_set_default_wep_key);
 602
 603 static int iwl_set_wep_dynamic_key_info(struct iwl_priv *priv,
 604                                 struct ieee80211_key_conf *keyconf,
 605                                 u8 sta_id)
 606 {
 607         unsigned long flags;
 608         __le16 key_flags = 0;
 609         int ret;
 610
 611         keyconf->flags &= ~IEEE80211_KEY_FLAG_GENERATE_IV;
 612
 613         key_flags |= (STA_KEY_FLG_WEP | STA_KEY_FLG_MAP_KEY_MSK);
 614         key_flags |= cpu_to_le16(keyconf->keyidx << STA_KEY_FLG_KEYID_POS);
 615         key_flags &= ~STA_KEY_FLG_INVALID;
 616
 617         if (keyconf->keylen == WEP_KEY_LEN_128)
 618                 key_flags |= STA_KEY_FLG_KEY_SIZE_MSK;
 619
 620         if (sta_id == priv->hw_params.bcast_sta_id)
 621                 key_flags |= STA_KEY_MULTICAST_MSK;
 622
 623         spin_lock_irqsave(&priv->sta_lock, flags);
 624
 625         priv->stations[sta_id].keyinfo.alg = keyconf->alg;
 626         priv->stations[sta_id].keyinfo.keylen = keyconf->keylen;
 627         priv->stations[sta_id].keyinfo.keyidx = keyconf->keyidx;
 628
 629         memcpy(priv->stations[sta_id].keyinfo.key,
 630                                 keyconf->key, keyconf->keylen);
 631
 632         memcpy(&priv->stations[sta_id].sta.key.key[3],
 633                                 keyconf->key, keyconf->keylen);
 634
 635         if ((priv->stations[sta_id].sta.key.key_flags & STA_KEY_FLG_ENCRYPT_MSK)
 636                         == STA_KEY_FLG_NO_ENC)
 637                 priv->stations[sta_id].sta.key.key_offset =
 638                                  iwl_get_free_ucode_key_index(priv);
 639         /* else, we are overriding an existing key => no need to allocated room
 640          * in uCode. */
 641
 642         WARN(priv->stations[sta_id].sta.key.key_offset == WEP_INVALID_OFFSET,
 643                 "no space for new kew");
 644
 645         priv->stations[sta_id].sta.key.key_flags = key_flags;
 646         priv->stations[sta_id].sta.sta.modify_mask = STA_MODIFY_KEY_MASK;
 647         priv->stations[sta_id].sta.mode = STA_CONTROL_MODIFY_MSK;
 648
 649         ret = iwl_send_add_sta(priv, &priv->stations[sta_id].sta, CMD_ASYNC);
 650
 651         spin_unlock_irqrestore(&priv->sta_lock, flags);
 652
 653         return ret;
 654 }
 655
 656 static int iwl_set_ccmp_dynamic_key_info(struct iwl_priv *priv,
 657                                    struct ieee80211_key_conf *keyconf,
 658                                    u8 sta_id)
 659 {
 660         unsigned long flags;
 661         __le16 key_flags = 0;
 662         int ret;
 663
 664         key_flags |= (STA_KEY_FLG_CCMP | STA_KEY_FLG_MAP_KEY_MSK);
 665         key_flags |= cpu_to_le16(keyconf->keyidx << STA_KEY_FLG_KEYID_POS);
 666         key_flags &= ~STA_KEY_FLG_INVALID;
 667
 668         if (sta_id == priv->hw_params.bcast_sta_id)
 669                 key_flags |= STA_KEY_MULTICAST_MSK;
 670
 671         keyconf->flags |= IEEE80211_KEY_FLAG_GENERATE_IV;
 672
 673         spin_lock_irqsave(&priv->sta_lock, flags);
 674         priv->stations[sta_id].keyinfo.alg = keyconf->alg;
 675         priv->stations[sta_id].keyinfo.keylen = keyconf->keylen;
 676
 677         memcpy(priv->stations[sta_id].keyinfo.key, keyconf->key,
 678                keyconf->keylen);
 679
 680         memcpy(priv->stations[sta_id].sta.key.key, keyconf->key,
 681                keyconf->keylen);
 682
 683         if ((priv->stations[sta_id].sta.key.key_flags & STA_KEY_FLG_ENCRYPT_MSK)
 684                         == STA_KEY_FLG_NO_ENC)
 685                 priv->stations[sta_id].sta.key.key_offset =
 686                                  iwl_get_free_ucode_key_index(priv);
 687         /* else, we are overriding an existing key => no need to allocated room
 688          * in uCode. */
 689
 690         WARN(priv->stations[sta_id].sta.key.key_offset == WEP_INVALID_OFFSET,
 691                 "no space for new kew");
 692
 693         priv->stations[sta_id].sta.key.key_flags = key_flags;
 694         priv->stations[sta_id].sta.sta.modify_mask = STA_MODIFY_KEY_MASK;
 695         priv->stations[sta_id].sta.mode = STA_CONTROL_MODIFY_MSK;
 696
 697         ret = iwl_send_add_sta(priv, &priv->stations[sta_id].sta, CMD_ASYNC);
 698
 699         spin_unlock_irqrestore(&priv->sta_lock, flags);
 700
 701         return ret;
 702 }
 703
 704 static int iwl_set_tkip_dynamic_key_info(struct iwl_priv *priv,
 705                                    struct ieee80211_key_conf *keyconf,
 706                                    u8 sta_id)
 707 {
 708         unsigned long flags;
 709         int ret = 0;
 710
 711         keyconf->flags |= IEEE80211_KEY_FLAG_GENERATE_IV;
 712         keyconf->flags |= IEEE80211_KEY_FLAG_GENERATE_MMIC;
 713
 714         spin_lock_irqsave(&priv->sta_lock, flags);
 715
 716         priv->stations[sta_id].keyinfo.alg = keyconf->alg;
 717         priv->stations[sta_id].keyinfo.keylen = 16;
 718
 719         if ((priv->stations[sta_id].sta.key.key_flags & STA_KEY_FLG_ENCRYPT_MSK)
 720                         == STA_KEY_FLG_NO_ENC)
 721                 priv->stations[sta_id].sta.key.key_offset =
 722                                  iwl_get_free_ucode_key_index(priv);
 723         /* else, we are overriding an existing key => no need to allocated room
 724          * in uCode. */
 725
 726         WARN(priv->stations[sta_id].sta.key.key_offset == WEP_INVALID_OFFSET,
 727                 "no space for new kew");
 728
 729         /* This copy is acutally not needed: we get the key with each TX */
 730         memcpy(priv->stations[sta_id].keyinfo.key, keyconf->key, 16);
 731
 732         memcpy(priv->stations[sta_id].sta.key.key, keyconf->key, 16);
 733
 734         spin_unlock_irqrestore(&priv->sta_lock, flags);
 735
 736         return ret;
 737 }
 738
 739 void iwl_update_tkip_key(struct iwl_priv *priv,
 740                         struct ieee80211_key_conf *keyconf,
 741                         const u8 *addr, u32 iv32, u16 *phase1key)
 742 {
 743         u8 sta_id = IWL_INVALID_STATION;
 744         unsigned long flags;
 745         __le16 key_flags = 0;
 746         int i;
 747         DECLARE_MAC_BUF(mac);
 748
 749         sta_id = iwl_find_station(priv, addr);
 750         if (sta_id == IWL_INVALID_STATION) {
 751                 IWL_DEBUG_MAC80211("leave - %pM not in station map.\n",
 752                                    addr);
 753                 return;
 754         }
 755
 756         if (iwl_scan_cancel(priv)) {
 757                 /* cancel scan failed, just live w/ bad key and rely
 758                    briefly on SW decryption */
 759                 return;
 760         }
 761
 762         key_flags |= (STA_KEY_FLG_TKIP | STA_KEY_FLG_MAP_KEY_MSK);
 763         key_flags |= cpu_to_le16(keyconf->keyidx << STA_KEY_FLG_KEYID_POS);
 764         key_flags &= ~STA_KEY_FLG_INVALID;
 765
 766         if (sta_id == priv->hw_params.bcast_sta_id)
 767                 key_flags |= STA_KEY_MULTICAST_MSK;
 768
 769         spin_lock_irqsave(&priv->sta_lock, flags);
 770
 771         priv->stations[sta_id].sta.key.key_flags = key_flags;
 772         priv->stations[sta_id].sta.key.tkip_rx_tsc_byte2 = (u8) iv32;
 773
 774         for (i = 0; i < 5; i++)
 775                 priv->stations[sta_id].sta.key.tkip_rx_ttak[i] =
 776                         cpu_to_le16(phase1key[i]);
 777
 778         priv->stations[sta_id].sta.sta.modify_mask = STA_MODIFY_KEY_MASK;
 779         priv->stations[sta_id].sta.mode = STA_CONTROL_MODIFY_MSK;
 780
 781         iwl_send_add_sta(priv, &priv->stations[sta_id].sta, CMD_ASYNC);
 782
 783         spin_unlock_irqrestore(&priv->sta_lock, flags);
 784
 785 }
 786 EXPORT_SYMBOL(iwl_update_tkip_key);
 787
 788 int iwl_remove_dynamic_key(struct iwl_priv *priv,
 789                                 struct ieee80211_key_conf *keyconf,
 790                                 u8 sta_id)
 791 {
 792         unsigned long flags;
 793         int ret = 0;
 794         u16 key_flags;
 795         u8 keyidx;
 796
 797         priv->key_mapping_key--;
 798
 799         spin_lock_irqsave(&priv->sta_lock, flags);
 800         key_flags = le16_to_cpu(priv->stations[sta_id].sta.key.key_flags);
 801         keyidx = (key_flags >> STA_KEY_FLG_KEYID_POS) & 0x3;
 802
 803         IWL_DEBUG_WEP("Remove dynamic key: idx=%d sta=%d\n",
 804                       keyconf->keyidx, sta_id);
 805
 806         if (keyconf->keyidx != keyidx) {
 807                 /* We need to remove a key with index different that the one
 808                  * in the uCode. This means that the key we need to remove has
 809                  * been replaced by another one with different index.
 810                  * Don't do anything and return ok
 811                  */
 812                 spin_unlock_irqrestore(&priv->sta_lock, flags);
 813                 return 0;
 814         }
 815
 816         if (priv->stations[sta_id].sta.key.key_offset == WEP_INVALID_OFFSET) {
 817                 IWL_WARNING("Removing wrong key %d 0x%x\n",
 818                             keyconf->keyidx, key_flags);
 819                 spin_unlock_irqrestore(&priv->sta_lock, flags);
 820                 return 0;
 821         }
 822
 823         if (!test_and_clear_bit(priv->stations[sta_id].sta.key.key_offset,
 824                 &priv->ucode_key_table))
 825                 IWL_ERROR("index %d not used in uCode key table.\n",
 826                         priv->stations[sta_id].sta.key.key_offset);
 827         memset(&priv->stations[sta_id].keyinfo, 0,
 828                                         sizeof(struct iwl_hw_key));
 829         memset(&priv->stations[sta_id].sta.key, 0,
 830                                         sizeof(struct iwl4965_keyinfo));
 831         priv->stations[sta_id].sta.key.key_flags =
 832                         STA_KEY_FLG_NO_ENC | STA_KEY_FLG_INVALID;
 833         priv->stations[sta_id].sta.key.key_offset = WEP_INVALID_OFFSET;
 834         priv->stations[sta_id].sta.sta.modify_mask = STA_MODIFY_KEY_MASK;
 835         priv->stations[sta_id].sta.mode = STA_CONTROL_MODIFY_MSK;
 836
 837         ret =  iwl_send_add_sta(priv, &priv->stations[sta_id].sta, CMD_ASYNC);
 838         spin_unlock_irqrestore(&priv->sta_lock, flags);
 839         return ret;
 840 }
 841 EXPORT_SYMBOL(iwl_remove_dynamic_key);
 842
 843 int iwl_set_dynamic_key(struct iwl_priv *priv,
 844                                 struct ieee80211_key_conf *keyconf, u8 sta_id)
 845 {
 846         int ret;
 847
 848         priv->key_mapping_key++;
 849         keyconf->hw_key_idx = HW_KEY_DYNAMIC;
 850
 851         switch (keyconf->alg) {
 852         case ALG_CCMP:
 853                 ret = iwl_set_ccmp_dynamic_key_info(priv, keyconf, sta_id);
 854                 break;
 855         case ALG_TKIP:
 856                 ret = iwl_set_tkip_dynamic_key_info(priv, keyconf, sta_id);
 857                 break;
 858         case ALG_WEP:
 859                 ret = iwl_set_wep_dynamic_key_info(priv, keyconf, sta_id);
 860                 break;
 861         default:
 862                 IWL_ERROR("Unknown alg: %s alg = %d\n", __func__, keyconf->alg);
 863                 ret = -EINVAL;
 864         }
 865
 866         IWL_DEBUG_WEP("Set dynamic key: alg= %d len=%d idx=%d sta=%d ret=%d\n",
 867                       keyconf->alg, keyconf->keylen, keyconf->keyidx,
 868                       sta_id, ret);
 869
 870         return ret;
 871 }
 872 EXPORT_SYMBOL(iwl_set_dynamic_key);
 873
 874 #ifdef CONFIG_IWLWIFI_DEBUG
 875 static void iwl_dump_lq_cmd(struct iwl_priv *priv,
 876                            struct iwl_link_quality_cmd *lq)
 877 {
 878         int i;
 879         IWL_DEBUG_RATE("lq station id 0x%x\n", lq->sta_id);
 880         IWL_DEBUG_RATE("lq ant 0x%X 0x%X\n",
 881                        lq->general_params.single_stream_ant_msk,
 882                        lq->general_params.dual_stream_ant_msk);
 883
 884         for (i = 0; i < LINK_QUAL_MAX_RETRY_NUM; i++)
 885                 IWL_DEBUG_RATE("lq index %d 0x%X\n",
 886                                i, lq->rs_table[i].rate_n_flags);
 887 }
 888 #else
 889 static inline void iwl_dump_lq_cmd(struct iwl_priv *priv,
 890                                    struct iwl_link_quality_cmd *lq)
 891 {
 892 }
 893 #endif
 894
 895 int iwl_send_lq_cmd(struct iwl_priv *priv,
 896                     struct iwl_link_quality_cmd *lq, u8 flags)
 897 {
 898         struct iwl_host_cmd cmd = {
 899                 .id = REPLY_TX_LINK_QUALITY_CMD,
 900                 .len = sizeof(struct iwl_link_quality_cmd),
 901                 .meta.flags = flags,
 902                 .data = lq,
 903         };
 904
 905         if ((lq->sta_id == 0xFF) &&
 906             (priv->iw_mode == NL80211_IFTYPE_ADHOC))
 907                 return -EINVAL;
 908
 909         if (lq->sta_id == 0xFF)
 910                 lq->sta_id = IWL_AP_ID;
 911
 912         iwl_dump_lq_cmd(priv, lq);
 913
 914         if (iwl_is_associated(priv) && priv->assoc_station_added)
 915                 return  iwl_send_cmd(priv, &cmd);
 916
 917         return 0;
 918 }
 919 EXPORT_SYMBOL(iwl_send_lq_cmd);
 920
 921 /**
 922  * iwl_sta_init_lq - Initialize a station's hardware rate table
 923  *
 924  * The uCode's station table contains a table of fallback rates
 925  * for automatic fallback during transmission.
 926  *
 927  * NOTE: This sets up a default set of values.  These will be replaced later
 928  *       if the driver's iwl-agn-rs rate scaling algorithm is used, instead of
 929  *       rc80211_simple.
 930  *
 931  * NOTE: Run REPLY_ADD_STA command to set up station table entry, before
 932  *       calling this function (which runs REPLY_TX_LINK_QUALITY_CMD,
 933  *       which requires station table entry to exist).
 934  */
 935 static void iwl_sta_init_lq(struct iwl_priv *priv, const u8 *addr, int is_ap)
 936 {
 937         int i, r;
 938         struct iwl_link_quality_cmd link_cmd = {
 939                 .reserved1 = 0,
 940         };
 941         u32 rate_flags;
 942
 943         /* Set up the rate scaling to start at selected rate, fall back
 944          * all the way down to 1M in IEEE order, and then spin on 1M */
 945         if (is_ap)
 946                 r = IWL_RATE_54M_INDEX;
 947         else if (priv->band == IEEE80211_BAND_5GHZ)
 948                 r = IWL_RATE_6M_INDEX;
 949         else
 950                 r = IWL_RATE_1M_INDEX;
 951
 952         for (i = 0; i < LINK_QUAL_MAX_RETRY_NUM; i++) {
 953                 rate_flags = 0;
 954                 if (r >= IWL_FIRST_CCK_RATE && r <= IWL_LAST_CCK_RATE)
 955                         rate_flags |= RATE_MCS_CCK_MSK;
 956
 957                 rate_flags |= first_antenna(priv->hw_params.valid_tx_ant) <<
 958                                 RATE_MCS_ANT_POS;
 959
 960                 link_cmd.rs_table[i].rate_n_flags =
 961                         iwl_hw_set_rate_n_flags(iwl_rates[r].plcp, rate_flags);
 962                 r = iwl_get_prev_ieee_rate(r);
 963         }
 964
 965         link_cmd.general_params.single_stream_ant_msk =
 966                                 first_antenna(priv->hw_params.valid_tx_ant);
 967         link_cmd.general_params.dual_stream_ant_msk = 3;
 968         link_cmd.agg_params.agg_dis_start_th = 3;
 969         link_cmd.agg_params.agg_time_limit = cpu_to_le16(4000);
 970
 971         /* Update the rate scaling for control frame Tx to AP */
 972         link_cmd.sta_id = is_ap ? IWL_AP_ID : priv->hw_params.bcast_sta_id;
 973
 974         iwl_send_cmd_pdu_async(priv, REPLY_TX_LINK_QUALITY_CMD,
 975                                sizeof(link_cmd), &link_cmd, NULL);
 976 }
 977
 978 /**
 979  * iwl_rxon_add_station - add station into station table.
 980  *
 981  * there is only one AP station with id= IWL_AP_ID
 982  * NOTE: mutex must be held before calling this function
 983  */
 984 int iwl_rxon_add_station(struct iwl_priv *priv, const u8 *addr, int is_ap)
 985 {
 986         struct ieee80211_sta *sta;
 987         struct ieee80211_sta_ht_cap ht_config;
 988         struct ieee80211_sta_ht_cap *cur_ht_config = NULL;
 989         u8 sta_id;
 990
 991         /* Add station to device's station table */
 992
 993         /*
 994          * XXX: This check is definitely not correct, if we're an AP
 995          *      it'll always be false which is not what we want, but
 996          *      it doesn't look like iwlagn is prepared to be an HT
 997          *      AP anyway.
 998          */
 999         if (priv->current_ht_config.is_ht) {
1000                 rcu_read_lock();
1001                 sta = ieee80211_find_sta(priv->hw, addr);
1002                 if (sta) {
1003                         memcpy(&ht_config, &sta->ht_cap, sizeof(ht_config));
1004                         cur_ht_config = &ht_config;
1005                 }
1006                 rcu_read_unlock();
1007         }
1008
1009         sta_id = iwl_add_station_flags(priv, addr, is_ap,
1010                                        0, cur_ht_config);
1011
1012         /* Set up default rate scaling table in device's station table */
1013         iwl_sta_init_lq(priv, addr, is_ap);
1014
1015         return sta_id;
1016 }
1017 EXPORT_SYMBOL(iwl_rxon_add_station);
1018
1019 /**
1020  * iwl_get_sta_id - Find station's index within station table
1021  *
1022  * If new IBSS station, create new entry in station table
1023  */
1024 int iwl_get_sta_id(struct iwl_priv *priv, struct ieee80211_hdr *hdr)
1025 {
1026         int sta_id;
1027         u16 fc = le16_to_cpu(hdr->frame_control);
1028
1029         /* If this frame is broadcast or management, use broadcast station id */
1030         if (((fc & IEEE80211_FCTL_FTYPE) != IEEE80211_FTYPE_DATA) ||
1031             is_multicast_ether_addr(hdr->addr1))
1032                 return priv->hw_params.bcast_sta_id;
1033
1034         switch (priv->iw_mode) {
1035
1036         /* If we are a client station in a BSS network, use the special
1037          * AP station entry (that's the only station we communicate with) */
1038         case NL80211_IFTYPE_STATION:
1039                 return IWL_AP_ID;
1040
1041         /* If we are an AP, then find the station, or use BCAST */
1042         case NL80211_IFTYPE_AP:
1043                 sta_id = iwl_find_station(priv, hdr->addr1);
1044                 if (sta_id != IWL_INVALID_STATION)
1045                         return sta_id;
1046                 return priv->hw_params.bcast_sta_id;
1047
1048         /* If this frame is going out to an IBSS network, find the station,
1049          * or create a new station table entry */
1050         case NL80211_IFTYPE_ADHOC:
1051                 sta_id = iwl_find_station(priv, hdr->addr1);
1052                 if (sta_id != IWL_INVALID_STATION)
1053                         return sta_id;
1054
1055                 /* Create new station table entry */
1056                 sta_id = iwl_add_station_flags(priv, hdr->addr1,
1057                                                    0, CMD_ASYNC, NULL);
1058
1059                 if (sta_id != IWL_INVALID_STATION)
1060                         return sta_id;
1061
1062                 IWL_DEBUG_DROP("Station %pM not in station map. "
1063                                "Defaulting to broadcast...\n",
1064                                hdr->addr1);
1065                 iwl_print_hex_dump(priv, IWL_DL_DROP, (u8 *) hdr, sizeof(*hdr));
1066                 return priv->hw_params.bcast_sta_id;
1067
1068         /* If we are in monitor mode, use BCAST. This is required for
1069          * packet injection. */
1070         case NL80211_IFTYPE_MONITOR:
1071                 return priv->hw_params.bcast_sta_id;
1072
1073         default:
1074                 IWL_WARNING("Unknown mode of operation: %d\n", priv->iw_mode);
1075                 return priv->hw_params.bcast_sta_id;
1076         }
1077 }
1078 EXPORT_SYMBOL(iwl_get_sta_id);
1079
1080 /**
1081  * iwl_sta_tx_modify_enable_tid - Enable Tx for this TID in station table
1082  */
1083 void iwl_sta_tx_modify_enable_tid(struct iwl_priv *priv, int sta_id, int tid)
1084 {
1085         unsigned long flags;
1086
1087         /* Remove "disable" flag, to enable Tx for this TID */
1088         spin_lock_irqsave(&priv->sta_lock, flags);
1089         priv->stations[sta_id].sta.sta.modify_mask = STA_MODIFY_TID_DISABLE_TX;
1090         priv->stations[sta_id].sta.tid_disable_tx &= cpu_to_le16(~(1 << tid));
1091         priv->stations[sta_id].sta.mode = STA_CONTROL_MODIFY_MSK;
1092         spin_unlock_irqrestore(&priv->sta_lock, flags);
1093
1094         iwl_send_add_sta(priv, &priv->stations[sta_id].sta, CMD_ASYNC);
1095 }
1096 EXPORT_SYMBOL(iwl_sta_tx_modify_enable_tid);
1097
1098 int iwl_sta_rx_agg_start(struct iwl_priv *priv,
1099                          const u8 *addr, int tid, u16 ssn)
1100 {
1101         unsigned long flags;
1102         int sta_id;
1103
1104         sta_id = iwl_find_station(priv, addr);
1105         if (sta_id == IWL_INVALID_STATION)
1106                 return -ENXIO;
1107
1108         spin_lock_irqsave(&priv->sta_lock, flags);
1109         priv->stations[sta_id].sta.station_flags_msk = 0;
1110         priv->stations[sta_id].sta.sta.modify_mask = STA_MODIFY_ADDBA_TID_MSK;
1111         priv->stations[sta_id].sta.add_immediate_ba_tid = (u8)tid;
1112         priv->stations[sta_id].sta.add_immediate_ba_ssn = cpu_to_le16(ssn);
1113         priv->stations[sta_id].sta.mode = STA_CONTROL_MODIFY_MSK;
1114         spin_unlock_irqrestore(&priv->sta_lock, flags);
1115
1116         return iwl_send_add_sta(priv, &priv->stations[sta_id].sta,
1117                                         CMD_ASYNC);
1118 }
1119 EXPORT_SYMBOL(iwl_sta_rx_agg_start);
1120
1121 int iwl_sta_rx_agg_stop(struct iwl_priv *priv, const u8 *addr, int tid)
1122 {
1123         unsigned long flags;
1124         int sta_id;
1125
1126         sta_id = iwl_find_station(priv, addr);
1127         if (sta_id == IWL_INVALID_STATION)
1128                 return -ENXIO;
1129
1130         spin_lock_irqsave(&priv->sta_lock, flags);
1131         priv->stations[sta_id].sta.station_flags_msk = 0;
1132         priv->stations[sta_id].sta.sta.modify_mask = STA_MODIFY_DELBA_TID_MSK;
1133         priv->stations[sta_id].sta.remove_immediate_ba_tid = (u8)tid;
1134         priv->stations[sta_id].sta.mode = STA_CONTROL_MODIFY_MSK;
1135         spin_unlock_irqrestore(&priv->sta_lock, flags);
1136
1137         return iwl_send_add_sta(priv, &priv->stations[sta_id].sta,
1138                                         CMD_ASYNC);
1139 }
1140 EXPORT_SYMBOL(iwl_sta_rx_agg_stop);
1141
1142 static void iwl_sta_modify_ps_wake(struct iwl_priv *priv, int sta_id)
1143 {
1144         unsigned long flags;
1145
1146         spin_lock_irqsave(&priv->sta_lock, flags);
1147         priv->stations[sta_id].sta.station_flags &= ~STA_FLG_PWR_SAVE_MSK;
1148         priv->stations[sta_id].sta.station_flags_msk = STA_FLG_PWR_SAVE_MSK;
1149         priv->stations[sta_id].sta.sta.modify_mask = 0;
1150         priv->stations[sta_id].sta.mode = STA_CONTROL_MODIFY_MSK;
1151         spin_unlock_irqrestore(&priv->sta_lock, flags);
1152
1153         iwl_send_add_sta(priv, &priv->stations[sta_id].sta, CMD_ASYNC);
1154 }
1155
1156 void iwl_update_ps_mode(struct iwl_priv *priv, u16 ps_bit, u8 *addr)
1157 {
1158         /* FIXME: need locking over ps_status ??? */
1159         u8 sta_id = iwl_find_station(priv, addr);
1160
1161         if (sta_id != IWL_INVALID_STATION) {
1162                 u8 sta_awake = priv->stations[sta_id].
1163                                 ps_status == STA_PS_STATUS_WAKE;
1164
1165                 if (sta_awake && ps_bit)
1166                         priv->stations[sta_id].ps_status = STA_PS_STATUS_SLEEP;
1167                 else if (!sta_awake && !ps_bit) {
1168                         iwl_sta_modify_ps_wake(priv, sta_id);
1169                         priv->stations[sta_id].ps_status = STA_PS_STATUS_WAKE;
1170                 }
1171         }
1172 }
1173