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

   1 /******************************************************************************
   2  *
   3  * Copyright(c) 2003 - 2009 Intel Corporation. All rights reserved.
   4  *
   5  * Portions of this file are derived from the ipw3945 project, as well
   6  * as portions of the ieee80211 subsystem header files.
   7  *
   8  * This program is free software; you can redistribute it and/or modify it
   9  * under the terms of version 2 of the GNU General Public License as
  10  * published by the Free Software Foundation.
  11  *
  12  * This program is distributed in the hope that it will be useful, but WITHOUT
  13  * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
  14  * FITNESS FOR A PARTICULAR PURPOSE.  See the GNU General Public License for
  15  * more details.
  16  *
  17  * You should have received a copy of the GNU General Public License along with
  18  * this program; if not, write to the Free Software Foundation, Inc.,
  19  * 51 Franklin Street, Fifth Floor, Boston, MA 02110, USA
  20  *
  21  * The full GNU General Public License is included in this distribution in the
  22  * file called LICENSE.
  23  *
  24  * Contact Information:
  25  *  Intel Linux Wireless <ilw@linux.intel.com>
  26  * Intel Corporation, 5200 N.E. Elam Young Parkway, Hillsboro, OR 97124-6497
  27  *
  28  *****************************************************************************/
  29
  30 #include <net/mac80211.h>
  31 #include <linux/etherdevice.h>
  32
  33 #include "iwl-dev.h"
  34 #include "iwl-core.h"
  35 #include "iwl-sta.h"
  36
  37 #define IWL_STA_DRIVER_ACTIVE BIT(0) /* driver entry is active */
  38 #define IWL_STA_UCODE_ACTIVE  BIT(1) /* ucode entry is active */
  39
  40 u8 iwl_find_station(struct iwl_priv *priv, const u8 *addr)
  41 {
  42         int i;
  43         int start = 0;
  44         int ret = IWL_INVALID_STATION;
  45         unsigned long flags;
  46
  47         if ((priv->iw_mode == NL80211_IFTYPE_ADHOC) ||
  48             (priv->iw_mode == NL80211_IFTYPE_AP))
  49                 start = IWL_STA_ID;
  50
  51         if (is_broadcast_ether_addr(addr))
  52                 return priv->hw_params.bcast_sta_id;
  53
  54         spin_lock_irqsave(&priv->sta_lock, flags);
  55         for (i = start; i < priv->hw_params.max_stations; i++)
  56                 if (priv->stations[i].used &&
  57                     (!compare_ether_addr(priv->stations[i].sta.sta.addr,
  58                                          addr))) {
  59                         ret = i;
  60                         goto out;
  61                 }
  62
  63         IWL_DEBUG_ASSOC_LIMIT("can not find STA %pM total %d\n",
  64                               addr, priv->num_stations);
  65
  66  out:
  67         spin_unlock_irqrestore(&priv->sta_lock, flags);
  68         return ret;
  69 }
  70 EXPORT_SYMBOL(iwl_find_station);
  71
  72 int iwl_get_ra_sta_id(struct iwl_priv *priv, struct ieee80211_hdr *hdr)
  73 {
  74         if (priv->iw_mode == NL80211_IFTYPE_STATION) {
  75                 return IWL_AP_ID;
  76         } else {
  77                 u8 *da = ieee80211_get_DA(hdr);
  78                 return iwl_find_station(priv, da);
  79         }
  80 }
  81 EXPORT_SYMBOL(iwl_get_ra_sta_id);
  82
  83 static void iwl_sta_ucode_activate(struct iwl_priv *priv, u8 sta_id)
  84 {
  85         unsigned long flags;
  86
  87         spin_lock_irqsave(&priv->sta_lock, flags);
  88
  89         if (!(priv->stations[sta_id].used & IWL_STA_DRIVER_ACTIVE))
  90                 IWL_ERR(priv, "ACTIVATE a non DRIVER active station %d\n",
  91                         sta_id);
  92
  93         priv->stations[sta_id].used |= IWL_STA_UCODE_ACTIVE;
  94         IWL_DEBUG_ASSOC("Added STA to Ucode: %pM\n",
  95                         priv->stations[sta_id].sta.sta.addr);
  96
  97         spin_unlock_irqrestore(&priv->sta_lock, flags);
  98 }
  99
 100 static int iwl_add_sta_callback(struct iwl_priv *priv,
 101                                    struct iwl_cmd *cmd, struct sk_buff *skb)
 102 {
 103         struct iwl_rx_packet *res = NULL;
 104         struct iwl_addsta_cmd *addsta =
 105                 (struct iwl_addsta_cmd *)cmd->cmd.payload;
 106         u8 sta_id = addsta->sta.sta_id;
 107
 108         if (!skb) {
 109                 IWL_ERR(priv, "Error: Response NULL in REPLY_ADD_STA.\n");
 110                 return 1;
 111         }
 112
 113         res = (struct iwl_rx_packet *)skb->data;
 114         if (res->hdr.flags & IWL_CMD_FAILED_MSK) {
 115                 IWL_ERR(priv, "Bad return from REPLY_ADD_STA (0x%08X)\n",
 116                           res->hdr.flags);
 117                 return 1;
 118         }
 119
 120         switch (res->u.add_sta.status) {
 121         case ADD_STA_SUCCESS_MSK:
 122                 iwl_sta_ucode_activate(priv, sta_id);
 123                  /* fall through */
 124         default:
 125                 IWL_DEBUG_HC("Received REPLY_ADD_STA:(0x%08X)\n",
 126                              res->u.add_sta.status);
 127                 break;
 128         }
 129
 130         /* We didn't cache the SKB; let the caller free it */
 131         return 1;
 132 }
 133
 134 static int iwl_send_add_sta(struct iwl_priv *priv,
 135                      struct iwl_addsta_cmd *sta, u8 flags)
 136 {
 137         struct iwl_rx_packet *res = NULL;
 138         int ret = 0;
 139         u8 data[sizeof(*sta)];
 140         struct iwl_host_cmd cmd = {
 141                 .id = REPLY_ADD_STA,
 142                 .meta.flags = flags,
 143                 .data = data,
 144         };
 145
 146         if (flags & CMD_ASYNC)
 147                 cmd.meta.u.callback = iwl_add_sta_callback;
 148         else
 149                 cmd.meta.flags |= CMD_WANT_SKB;
 150
 151         cmd.len = priv->cfg->ops->utils->build_addsta_hcmd(sta, data);
 152         ret = iwl_send_cmd(priv, &cmd);
 153
 154         if (ret || (flags & CMD_ASYNC))
 155                 return ret;
 156
 157         res = (struct iwl_rx_packet *)cmd.meta.u.skb->data;
 158         if (res->hdr.flags & IWL_CMD_FAILED_MSK) {
 159                 IWL_ERR(priv, "Bad return from REPLY_ADD_STA (0x%08X)\n",
 160                           res->hdr.flags);
 161                 ret = -EIO;
 162         }
 163
 164         if (ret == 0) {
 165                 switch (res->u.add_sta.status) {
 166                 case ADD_STA_SUCCESS_MSK:
 167                         iwl_sta_ucode_activate(priv, sta->sta.sta_id);
 168                         IWL_DEBUG_INFO("REPLY_ADD_STA PASSED\n");
 169                         break;
 170                 default:
 171                         ret = -EIO;
 172                         IWL_WARN(priv, "REPLY_ADD_STA failed\n");
 173                         break;
 174                 }
 175         }
 176
 177         priv->alloc_rxb_skb--;
 178         dev_kfree_skb_any(cmd.meta.u.skb);
 179
 180         return ret;
 181 }
 182
 183 static void iwl_set_ht_add_station(struct iwl_priv *priv, u8 index,
 184                                    struct ieee80211_sta_ht_cap *sta_ht_inf)
 185 {
 186         __le32 sta_flags;
 187         u8 mimo_ps_mode;
 188
 189         if (!sta_ht_inf || !sta_ht_inf->ht_supported)
 190                 goto done;
 191
 192         mimo_ps_mode = (sta_ht_inf->cap & IEEE80211_HT_CAP_SM_PS) >> 2;
 193
 194         sta_flags = priv->stations[index].sta.station_flags;
 195
 196         sta_flags &= ~(STA_FLG_RTS_MIMO_PROT_MSK | STA_FLG_MIMO_DIS_MSK);
 197
 198         switch (mimo_ps_mode) {
 199         case WLAN_HT_CAP_SM_PS_STATIC:
 200                 sta_flags |= STA_FLG_MIMO_DIS_MSK;
 201                 break;
 202         case WLAN_HT_CAP_SM_PS_DYNAMIC:
 203                 sta_flags |= STA_FLG_RTS_MIMO_PROT_MSK;
 204                 break;
 205         case WLAN_HT_CAP_SM_PS_DISABLED:
 206                 break;
 207         default:
 208                 IWL_WARN(priv, "Invalid MIMO PS mode %d\n", mimo_ps_mode);
 209                 break;
 210         }
 211
 212         sta_flags |= cpu_to_le32(
 213               (u32)sta_ht_inf->ampdu_factor << STA_FLG_MAX_AGG_SIZE_POS);
 214
 215         sta_flags |= cpu_to_le32(
 216               (u32)sta_ht_inf->ampdu_density << STA_FLG_AGG_MPDU_DENSITY_POS);
 217
 218         if (iwl_is_fat_tx_allowed(priv, sta_ht_inf))
 219                 sta_flags |= STA_FLG_FAT_EN_MSK;
 220         else
 221                 sta_flags &= ~STA_FLG_FAT_EN_MSK;
 222
 223         priv->stations[index].sta.station_flags = sta_flags;
 224  done:
 225         return;
 226 }
 227
 228 /**
 229  * iwl_add_station_flags - Add station to tables in driver and device
 230  */
 231 u8 iwl_add_station_flags(struct iwl_priv *priv, const u8 *addr, int is_ap,
 232                          u8 flags, struct ieee80211_sta_ht_cap *ht_info)
 233 {
 234         int i;
 235         int sta_id = IWL_INVALID_STATION;
 236         struct iwl_station_entry *station;
 237         unsigned long flags_spin;
 238
 239         spin_lock_irqsave(&priv->sta_lock, flags_spin);
 240         if (is_ap)
 241                 sta_id = IWL_AP_ID;
 242         else if (is_broadcast_ether_addr(addr))
 243                 sta_id = priv->hw_params.bcast_sta_id;
 244         else
 245                 for (i = IWL_STA_ID; i < priv->hw_params.max_stations; i++) {
 246                         if (!compare_ether_addr(priv->stations[i].sta.sta.addr,
 247                                                 addr)) {
 248                                 sta_id = i;
 249                                 break;
 250                         }
 251
 252                         if (!priv->stations[i].used &&
 253                             sta_id == IWL_INVALID_STATION)
 254                                 sta_id = i;
 255                 }
 256
 257         /* These two conditions have the same outcome, but keep them separate
 258            since they have different meanings */
 259         if (unlikely(sta_id == IWL_INVALID_STATION)) {
 260                 spin_unlock_irqrestore(&priv->sta_lock, flags_spin);
 261                 return sta_id;
 262         }
 263
 264         if (priv->stations[sta_id].used &&
 265             !compare_ether_addr(priv->stations[sta_id].sta.sta.addr, addr)) {
 266                 spin_unlock_irqrestore(&priv->sta_lock, flags_spin);
 267                 return sta_id;
 268         }
 269
 270
 271         station = &priv->stations[sta_id];
 272         station->used = IWL_STA_DRIVER_ACTIVE;
 273         IWL_DEBUG_ASSOC("Add STA to driver ID %d: %pM\n",
 274                         sta_id, addr);
 275         priv->num_stations++;
 276
 277         /* Set up the REPLY_ADD_STA command to send to device */
 278         memset(&station->sta, 0, sizeof(struct iwl_addsta_cmd));
 279         memcpy(station->sta.sta.addr, addr, ETH_ALEN);
 280         station->sta.mode = 0;
 281         station->sta.sta.sta_id = sta_id;
 282         station->sta.station_flags = 0;
 283
 284         /* BCAST station and IBSS stations do not work in HT mode */
 285         if (sta_id != priv->hw_params.bcast_sta_id &&
 286             priv->iw_mode != NL80211_IFTYPE_ADHOC)
 287                 iwl_set_ht_add_station(priv, sta_id, ht_info);
 288
 289         spin_unlock_irqrestore(&priv->sta_lock, flags_spin);
 290
 291         /* Add station to device's station table */
 292         iwl_send_add_sta(priv, &station->sta, flags);
 293         return sta_id;
 294
 295 }
 296 EXPORT_SYMBOL(iwl_add_station_flags);
 297
 298 static void iwl_sta_ucode_deactivate(struct iwl_priv *priv, const char *addr)
 299 {
 300         unsigned long flags;
 301         u8 sta_id = iwl_find_station(priv, addr);
 302
 303         BUG_ON(sta_id == IWL_INVALID_STATION);
 304
 305         IWL_DEBUG_ASSOC("Removed STA from Ucode: %pM\n", addr);
 306
 307         spin_lock_irqsave(&priv->sta_lock, flags);
 308
 309         /* Ucode must be active and driver must be non active */
 310         if (priv->stations[sta_id].used != IWL_STA_UCODE_ACTIVE)
 311                 IWL_ERR(priv, "removed non active STA %d\n", sta_id);
 312
 313         priv->stations[sta_id].used &= ~IWL_STA_UCODE_ACTIVE;
 314
 315         memset(&priv->stations[sta_id], 0, sizeof(struct iwl_station_entry));
 316         spin_unlock_irqrestore(&priv->sta_lock, flags);
 317 }
 318
 319 static int iwl_remove_sta_callback(struct iwl_priv *priv,
 320                                    struct iwl_cmd *cmd, struct sk_buff *skb)
 321 {
 322         struct iwl_rx_packet *res = NULL;
 323         struct iwl_rem_sta_cmd *rm_sta =
 324                  (struct iwl_rem_sta_cmd *)cmd->cmd.payload;
 325         const char *addr = rm_sta->addr;
 326
 327         if (!skb) {
 328                 IWL_ERR(priv, "Error: Response NULL in REPLY_REMOVE_STA.\n");
 329                 return 1;
 330         }
 331
 332         res = (struct iwl_rx_packet *)skb->data;
 333         if (res->hdr.flags & IWL_CMD_FAILED_MSK) {
 334                 IWL_ERR(priv, "Bad return from REPLY_REMOVE_STA (0x%08X)\n",
 335                 res->hdr.flags);
 336                 return 1;
 337         }
 338
 339         switch (res->u.rem_sta.status) {
 340         case REM_STA_SUCCESS_MSK:
 341                 iwl_sta_ucode_deactivate(priv, addr);
 342                 break;
 343         default:
 344                 IWL_ERR(priv, "REPLY_REMOVE_STA failed\n");
 345                 break;
 346         }
 347
 348         /* We didn't cache the SKB; let the caller free it */
 349         return 1;
 350 }
 351
 352 static int iwl_send_remove_station(struct iwl_priv *priv, const u8 *addr,
 353                                    u8 flags)
 354 {
 355         struct iwl_rx_packet *res = NULL;
 356         int ret;
 357
 358         struct iwl_rem_sta_cmd rm_sta_cmd;
 359
 360         struct iwl_host_cmd cmd = {
 361                 .id = REPLY_REMOVE_STA,
 362                 .len = sizeof(struct iwl_rem_sta_cmd),
 363                 .meta.flags = flags,
 364                 .data = &rm_sta_cmd,
 365         };
 366
 367         memset(&rm_sta_cmd, 0, sizeof(rm_sta_cmd));
 368         rm_sta_cmd.num_sta = 1;
 369         memcpy(&rm_sta_cmd.addr, addr , ETH_ALEN);
 370
 371         if (flags & CMD_ASYNC)
 372                 cmd.meta.u.callback = iwl_remove_sta_callback;
 373         else
 374                 cmd.meta.flags |= CMD_WANT_SKB;
 375         ret = iwl_send_cmd(priv, &cmd);
 376
 377         if (ret || (flags & CMD_ASYNC))
 378                 return ret;
 379
 380         res = (struct iwl_rx_packet *)cmd.meta.u.skb->data;
 381         if (res->hdr.flags & IWL_CMD_FAILED_MSK) {
 382                 IWL_ERR(priv, "Bad return from REPLY_REMOVE_STA (0x%08X)\n",
 383                           res->hdr.flags);
 384                 ret = -EIO;
 385         }
 386
 387         if (!ret) {
 388                 switch (res->u.rem_sta.status) {
 389                 case REM_STA_SUCCESS_MSK:
 390                         iwl_sta_ucode_deactivate(priv, addr);
 391                         IWL_DEBUG_ASSOC("REPLY_REMOVE_STA PASSED\n");
 392                         break;
 393                 default:
 394                         ret = -EIO;
 395                         IWL_ERR(priv, "REPLY_REMOVE_STA failed\n");
 396                         break;
 397                 }
 398         }
 399
 400         priv->alloc_rxb_skb--;
 401         dev_kfree_skb_any(cmd.meta.u.skb);
 402
 403         return ret;
 404 }
 405
 406 /**
 407  * iwl_remove_station - Remove driver's knowledge of station.
 408  */
 409 int iwl_remove_station(struct iwl_priv *priv, const u8 *addr, int is_ap)
 410 {
 411         int sta_id = IWL_INVALID_STATION;
 412         int i, ret = -EINVAL;
 413         unsigned long flags;
 414
 415         spin_lock_irqsave(&priv->sta_lock, flags);
 416
 417         if (is_ap)
 418                 sta_id = IWL_AP_ID;
 419         else if (is_broadcast_ether_addr(addr))
 420                 sta_id = priv->hw_params.bcast_sta_id;
 421         else
 422                 for (i = IWL_STA_ID; i < priv->hw_params.max_stations; i++)
 423                         if (priv->stations[i].used &&
 424                             !compare_ether_addr(priv->stations[i].sta.sta.addr,
 425                                                 addr)) {
 426                                 sta_id = i;
 427                                 break;
 428                         }
 429
 430         if (unlikely(sta_id == IWL_INVALID_STATION))
 431                 goto out;
 432
 433         IWL_DEBUG_ASSOC("Removing STA from driver:%d  %pM\n",
 434                 sta_id, addr);
 435
 436         if (!(priv->stations[sta_id].used & IWL_STA_DRIVER_ACTIVE)) {
 437                 IWL_ERR(priv, "Removing %pM but non DRIVER active\n",
 438                                 addr);
 439                 goto out;
 440         }
 441
 442         if (!(priv->stations[sta_id].used & IWL_STA_UCODE_ACTIVE)) {
 443                 IWL_ERR(priv, "Removing %pM but non UCODE active\n",
 444                                 addr);
 445                 goto out;
 446         }
 447
 448
 449         priv->stations[sta_id].used &= ~IWL_STA_DRIVER_ACTIVE;
 450
 451         priv->num_stations--;
 452
 453         BUG_ON(priv->num_stations < 0);
 454
 455         spin_unlock_irqrestore(&priv->sta_lock, flags);
 456
 457         ret = iwl_send_remove_station(priv, addr, CMD_ASYNC);
 458         return ret;
 459 out:
 460         spin_unlock_irqrestore(&priv->sta_lock, flags);
 461         return ret;
 462 }
 463 EXPORT_SYMBOL(iwl_remove_station);
 464
 465 /**
 466  * iwl_clear_stations_table - Clear the driver's station table
 467  *
 468  * NOTE:  This does not clear or otherwise alter the device's station table.
 469  */
 470 void iwl_clear_stations_table(struct iwl_priv *priv)
 471 {
 472         unsigned long flags;
 473
 474         spin_lock_irqsave(&priv->sta_lock, flags);
 475
 476         if (iwl_is_alive(priv) &&
 477            !test_bit(STATUS_EXIT_PENDING, &priv->status) &&
 478            iwl_send_cmd_pdu_async(priv, REPLY_REMOVE_ALL_STA, 0, NULL, NULL))
 479                 IWL_ERR(priv, "Couldn't clear the station table\n");
 480
 481         priv->num_stations = 0;
 482         memset(priv->stations, 0, sizeof(priv->stations));
 483
 484         spin_unlock_irqrestore(&priv->sta_lock, flags);
 485 }
 486 EXPORT_SYMBOL(iwl_clear_stations_table);
 487
 488 static int iwl_get_free_ucode_key_index(struct iwl_priv *priv)
 489 {
 490         int i;
 491
 492         for (i = 0; i < STA_KEY_MAX_NUM; i++)
 493                 if (!test_and_set_bit(i, &priv->ucode_key_table))
 494                         return i;
 495
 496         return WEP_INVALID_OFFSET;
 497 }
 498
 499 int iwl_send_static_wepkey_cmd(struct iwl_priv *priv, u8 send_if_empty)
 500 {
 501         int i, not_empty = 0;
 502         u8 buff[sizeof(struct iwl_wep_cmd) +
 503                 sizeof(struct iwl_wep_key) * WEP_KEYS_MAX];
 504         struct iwl_wep_cmd *wep_cmd = (struct iwl_wep_cmd *)buff;
 505         size_t cmd_size  = sizeof(struct iwl_wep_cmd);
 506         struct iwl_host_cmd cmd = {
 507                 .id = REPLY_WEPKEY,
 508                 .data = wep_cmd,
 509                 .meta.flags = CMD_ASYNC,
 510         };
 511
 512         memset(wep_cmd, 0, cmd_size +
 513                         (sizeof(struct iwl_wep_key) * WEP_KEYS_MAX));
 514
 515         for (i = 0; i < WEP_KEYS_MAX ; i++) {
 516                 wep_cmd->key[i].key_index = i;
 517                 if (priv->wep_keys[i].key_size) {
 518                         wep_cmd->key[i].key_offset = i;
 519                         not_empty = 1;
 520                 } else {
 521                         wep_cmd->key[i].key_offset = WEP_INVALID_OFFSET;
 522                 }
 523
 524                 wep_cmd->key[i].key_size = priv->wep_keys[i].key_size;
 525                 memcpy(&wep_cmd->key[i].key[3], priv->wep_keys[i].key,
 526                                 priv->wep_keys[i].key_size);
 527         }
 528
 529         wep_cmd->global_key_type = WEP_KEY_WEP_TYPE;
 530         wep_cmd->num_keys = WEP_KEYS_MAX;
 531
 532         cmd_size += sizeof(struct iwl_wep_key) * WEP_KEYS_MAX;
 533
 534         cmd.len = cmd_size;
 535
 536         if (not_empty || send_if_empty)
 537                 return iwl_send_cmd(priv, &cmd);
 538         else
 539                 return 0;
 540 }
 541 EXPORT_SYMBOL(iwl_send_static_wepkey_cmd);
 542
 543 int iwl_remove_default_wep_key(struct iwl_priv *priv,
 544                                struct ieee80211_key_conf *keyconf)
 545 {
 546         int ret;
 547         unsigned long flags;
 548
 549         spin_lock_irqsave(&priv->sta_lock, flags);
 550
 551         if (!test_and_clear_bit(keyconf->keyidx, &priv->ucode_key_table))
 552                 IWL_ERR(priv, "index %d not used in uCode key table.\n",
 553                           keyconf->keyidx);
 554
 555         priv->default_wep_key--;
 556         memset(&priv->wep_keys[keyconf->keyidx], 0, sizeof(priv->wep_keys[0]));
 557         ret = iwl_send_static_wepkey_cmd(priv, 1);
 558         IWL_DEBUG_WEP("Remove default WEP key: idx=%d ret=%d\n",
 559                       keyconf->keyidx, ret);
 560         spin_unlock_irqrestore(&priv->sta_lock, flags);
 561
 562         return ret;
 563 }
 564 EXPORT_SYMBOL(iwl_remove_default_wep_key);
 565
 566 int iwl_set_default_wep_key(struct iwl_priv *priv,
 567                             struct ieee80211_key_conf *keyconf)
 568 {
 569         int ret;
 570         unsigned long flags;
 571
 572         if (keyconf->keylen != WEP_KEY_LEN_128 &&
 573             keyconf->keylen != WEP_KEY_LEN_64) {
 574                 IWL_DEBUG_WEP("Bad WEP key length %d\n", keyconf->keylen);
 575                 return -EINVAL;
 576         }
 577
 578         keyconf->flags &= ~IEEE80211_KEY_FLAG_GENERATE_IV;
 579         keyconf->hw_key_idx = HW_KEY_DEFAULT;
 580         priv->stations[IWL_AP_ID].keyinfo.alg = ALG_WEP;
 581
 582         spin_lock_irqsave(&priv->sta_lock, flags);
 583         priv->default_wep_key++;
 584
 585         if (test_and_set_bit(keyconf->keyidx, &priv->ucode_key_table))
 586                 IWL_ERR(priv, "index %d already used in uCode key table.\n",
 587                         keyconf->keyidx);
 588
 589         priv->wep_keys[keyconf->keyidx].key_size = keyconf->keylen;
 590         memcpy(&priv->wep_keys[keyconf->keyidx].key, &keyconf->key,
 591                                                         keyconf->keylen);
 592
 593         ret = iwl_send_static_wepkey_cmd(priv, 0);
 594         IWL_DEBUG_WEP("Set default WEP key: len=%d idx=%d ret=%d\n",
 595                 keyconf->keylen, keyconf->keyidx, ret);
 596         spin_unlock_irqrestore(&priv->sta_lock, flags);
 597
 598         return ret;
 599 }
 600 EXPORT_SYMBOL(iwl_set_default_wep_key);
 601
 602 static int iwl_set_wep_dynamic_key_info(struct iwl_priv *priv,
 603                                 struct ieee80211_key_conf *keyconf,
 604                                 u8 sta_id)
 605 {
 606         unsigned long flags;
 607         __le16 key_flags = 0;
 608         int ret;
 609
 610         keyconf->flags &= ~IEEE80211_KEY_FLAG_GENERATE_IV;
 611
 612         key_flags |= (STA_KEY_FLG_WEP | STA_KEY_FLG_MAP_KEY_MSK);
 613         key_flags |= cpu_to_le16(keyconf->keyidx << STA_KEY_FLG_KEYID_POS);
 614         key_flags &= ~STA_KEY_FLG_INVALID;
 615
 616         if (keyconf->keylen == WEP_KEY_LEN_128)
 617                 key_flags |= STA_KEY_FLG_KEY_SIZE_MSK;
 618
 619         if (sta_id == priv->hw_params.bcast_sta_id)
 620                 key_flags |= STA_KEY_MULTICAST_MSK;
 621
 622         spin_lock_irqsave(&priv->sta_lock, flags);
 623
 624         priv->stations[sta_id].keyinfo.alg = keyconf->alg;
 625         priv->stations[sta_id].keyinfo.keylen = keyconf->keylen;
 626         priv->stations[sta_id].keyinfo.keyidx = keyconf->keyidx;
 627
 628         memcpy(priv->stations[sta_id].keyinfo.key,
 629                                 keyconf->key, keyconf->keylen);
 630
 631         memcpy(&priv->stations[sta_id].sta.key.key[3],
 632                                 keyconf->key, keyconf->keylen);
 633
 634         if ((priv->stations[sta_id].sta.key.key_flags & STA_KEY_FLG_ENCRYPT_MSK)
 635                         == STA_KEY_FLG_NO_ENC)
 636                 priv->stations[sta_id].sta.key.key_offset =
 637                                  iwl_get_free_ucode_key_index(priv);
 638         /* else, we are overriding an existing key => no need to allocated room
 639          * in uCode. */
 640
 641         WARN(priv->stations[sta_id].sta.key.key_offset == WEP_INVALID_OFFSET,
 642                 "no space for new kew");
 643
 644         priv->stations[sta_id].sta.key.key_flags = key_flags;
 645         priv->stations[sta_id].sta.sta.modify_mask = STA_MODIFY_KEY_MASK;
 646         priv->stations[sta_id].sta.mode = STA_CONTROL_MODIFY_MSK;
 647
 648         ret = iwl_send_add_sta(priv, &priv->stations[sta_id].sta, CMD_ASYNC);
 649
 650         spin_unlock_irqrestore(&priv->sta_lock, flags);
 651
 652         return ret;
 653 }
 654
 655 static int iwl_set_ccmp_dynamic_key_info(struct iwl_priv *priv,
 656                                    struct ieee80211_key_conf *keyconf,
 657                                    u8 sta_id)
 658 {
 659         unsigned long flags;
 660         __le16 key_flags = 0;
 661         int ret;
 662
 663         key_flags |= (STA_KEY_FLG_CCMP | STA_KEY_FLG_MAP_KEY_MSK);
 664         key_flags |= cpu_to_le16(keyconf->keyidx << STA_KEY_FLG_KEYID_POS);
 665         key_flags &= ~STA_KEY_FLG_INVALID;
 666
 667         if (sta_id == priv->hw_params.bcast_sta_id)
 668                 key_flags |= STA_KEY_MULTICAST_MSK;
 669
 670         keyconf->flags |= IEEE80211_KEY_FLAG_GENERATE_IV;
 671
 672         spin_lock_irqsave(&priv->sta_lock, flags);
 673         priv->stations[sta_id].keyinfo.alg = keyconf->alg;
 674         priv->stations[sta_id].keyinfo.keylen = keyconf->keylen;
 675
 676         memcpy(priv->stations[sta_id].keyinfo.key, keyconf->key,
 677                keyconf->keylen);
 678
 679         memcpy(priv->stations[sta_id].sta.key.key, keyconf->key,
 680                keyconf->keylen);
 681
 682         if ((priv->stations[sta_id].sta.key.key_flags & STA_KEY_FLG_ENCRYPT_MSK)
 683                         == STA_KEY_FLG_NO_ENC)
 684                 priv->stations[sta_id].sta.key.key_offset =
 685                                  iwl_get_free_ucode_key_index(priv);
 686         /* else, we are overriding an existing key => no need to allocated room
 687          * in uCode. */
 688
 689         WARN(priv->stations[sta_id].sta.key.key_offset == WEP_INVALID_OFFSET,
 690                 "no space for new kew");
 691
 692         priv->stations[sta_id].sta.key.key_flags = key_flags;
 693         priv->stations[sta_id].sta.sta.modify_mask = STA_MODIFY_KEY_MASK;
 694         priv->stations[sta_id].sta.mode = STA_CONTROL_MODIFY_MSK;
 695
 696         ret = iwl_send_add_sta(priv, &priv->stations[sta_id].sta, CMD_ASYNC);
 697
 698         spin_unlock_irqrestore(&priv->sta_lock, flags);
 699
 700         return ret;
 701 }
 702
 703 static int iwl_set_tkip_dynamic_key_info(struct iwl_priv *priv,
 704                                    struct ieee80211_key_conf *keyconf,
 705                                    u8 sta_id)
 706 {
 707         unsigned long flags;
 708         int ret = 0;
 709
 710         keyconf->flags |= IEEE80211_KEY_FLAG_GENERATE_IV;
 711         keyconf->flags |= IEEE80211_KEY_FLAG_GENERATE_MMIC;
 712
 713         spin_lock_irqsave(&priv->sta_lock, flags);
 714
 715         priv->stations[sta_id].keyinfo.alg = keyconf->alg;
 716         priv->stations[sta_id].keyinfo.keylen = 16;
 717
 718         if ((priv->stations[sta_id].sta.key.key_flags & STA_KEY_FLG_ENCRYPT_MSK)
 719                         == STA_KEY_FLG_NO_ENC)
 720                 priv->stations[sta_id].sta.key.key_offset =
 721                                  iwl_get_free_ucode_key_index(priv);
 722         /* else, we are overriding an existing key => no need to allocated room
 723          * in uCode. */
 724
 725         WARN(priv->stations[sta_id].sta.key.key_offset == WEP_INVALID_OFFSET,
 726                 "no space for new kew");
 727
 728         /* This copy is acutally not needed: we get the key with each TX */
 729         memcpy(priv->stations[sta_id].keyinfo.key, keyconf->key, 16);
 730
 731         memcpy(priv->stations[sta_id].sta.key.key, keyconf->key, 16);
 732
 733         spin_unlock_irqrestore(&priv->sta_lock, flags);
 734
 735         return ret;
 736 }
 737
 738 void iwl_update_tkip_key(struct iwl_priv *priv,
 739                         struct ieee80211_key_conf *keyconf,
 740                         const u8 *addr, u32 iv32, u16 *phase1key)
 741 {
 742         u8 sta_id = IWL_INVALID_STATION;
 743         unsigned long flags;
 744         __le16 key_flags = 0;
 745         int i;
 746         DECLARE_MAC_BUF(mac);
 747
 748         sta_id = iwl_find_station(priv, addr);
 749         if (sta_id == IWL_INVALID_STATION) {
 750                 IWL_DEBUG_MAC80211("leave - %pM not in station map.\n",
 751                                    addr);
 752                 return;
 753         }
 754
 755         if (iwl_scan_cancel(priv)) {
 756                 /* cancel scan failed, just live w/ bad key and rely
 757                    briefly on SW decryption */
 758                 return;
 759         }
 760
 761         key_flags |= (STA_KEY_FLG_TKIP | STA_KEY_FLG_MAP_KEY_MSK);
 762         key_flags |= cpu_to_le16(keyconf->keyidx << STA_KEY_FLG_KEYID_POS);
 763         key_flags &= ~STA_KEY_FLG_INVALID;
 764
 765         if (sta_id == priv->hw_params.bcast_sta_id)
 766                 key_flags |= STA_KEY_MULTICAST_MSK;
 767
 768         spin_lock_irqsave(&priv->sta_lock, flags);
 769
 770         priv->stations[sta_id].sta.key.key_flags = key_flags;
 771         priv->stations[sta_id].sta.key.tkip_rx_tsc_byte2 = (u8) iv32;
 772
 773         for (i = 0; i < 5; i++)
 774                 priv->stations[sta_id].sta.key.tkip_rx_ttak[i] =
 775                         cpu_to_le16(phase1key[i]);
 776
 777         priv->stations[sta_id].sta.sta.modify_mask = STA_MODIFY_KEY_MASK;
 778         priv->stations[sta_id].sta.mode = STA_CONTROL_MODIFY_MSK;
 779
 780         iwl_send_add_sta(priv, &priv->stations[sta_id].sta, CMD_ASYNC);
 781
 782         spin_unlock_irqrestore(&priv->sta_lock, flags);
 783
 784 }
 785 EXPORT_SYMBOL(iwl_update_tkip_key);
 786
 787 int iwl_remove_dynamic_key(struct iwl_priv *priv,
 788                                 struct ieee80211_key_conf *keyconf,
 789                                 u8 sta_id)
 790 {
 791         unsigned long flags;
 792         int ret = 0;
 793         u16 key_flags;
 794         u8 keyidx;
 795
 796         priv->key_mapping_key--;
 797
 798         spin_lock_irqsave(&priv->sta_lock, flags);
 799         key_flags = le16_to_cpu(priv->stations[sta_id].sta.key.key_flags);
 800         keyidx = (key_flags >> STA_KEY_FLG_KEYID_POS) & 0x3;
 801
 802         IWL_DEBUG_WEP("Remove dynamic key: idx=%d sta=%d\n",
 803                       keyconf->keyidx, sta_id);
 804
 805         if (keyconf->keyidx != keyidx) {
 806                 /* We need to remove a key with index different that the one
 807                  * in the uCode. This means that the key we need to remove has
 808                  * been replaced by another one with different index.
 809                  * Don't do anything and return ok
 810                  */
 811                 spin_unlock_irqrestore(&priv->sta_lock, flags);
 812                 return 0;
 813         }
 814
 815         if (priv->stations[sta_id].sta.key.key_offset == WEP_INVALID_OFFSET) {
 816                 IWL_WARN(priv, "Removing wrong key %d 0x%x\n",
 817                             keyconf->keyidx, key_flags);
 818                 spin_unlock_irqrestore(&priv->sta_lock, flags);
 819                 return 0;
 820         }
 821
 822         if (!test_and_clear_bit(priv->stations[sta_id].sta.key.key_offset,
 823                 &priv->ucode_key_table))
 824                 IWL_ERR(priv, "index %d not used in uCode key table.\n",
 825                         priv->stations[sta_id].sta.key.key_offset);
 826         memset(&priv->stations[sta_id].keyinfo, 0,
 827                                         sizeof(struct iwl_hw_key));
 828         memset(&priv->stations[sta_id].sta.key, 0,
 829                                         sizeof(struct iwl4965_keyinfo));
 830         priv->stations[sta_id].sta.key.key_flags =
 831                         STA_KEY_FLG_NO_ENC | STA_KEY_FLG_INVALID;
 832         priv->stations[sta_id].sta.key.key_offset = WEP_INVALID_OFFSET;
 833         priv->stations[sta_id].sta.sta.modify_mask = STA_MODIFY_KEY_MASK;
 834         priv->stations[sta_id].sta.mode = STA_CONTROL_MODIFY_MSK;
 835
 836         ret =  iwl_send_add_sta(priv, &priv->stations[sta_id].sta, CMD_ASYNC);
 837         spin_unlock_irqrestore(&priv->sta_lock, flags);
 838         return ret;
 839 }
 840 EXPORT_SYMBOL(iwl_remove_dynamic_key);
 841
 842 int iwl_set_dynamic_key(struct iwl_priv *priv,
 843                                 struct ieee80211_key_conf *keyconf, u8 sta_id)
 844 {
 845         int ret;
 846
 847         priv->key_mapping_key++;
 848         keyconf->hw_key_idx = HW_KEY_DYNAMIC;
 849
 850         switch (keyconf->alg) {
 851         case ALG_CCMP:
 852                 ret = iwl_set_ccmp_dynamic_key_info(priv, keyconf, sta_id);
 853                 break;
 854         case ALG_TKIP:
 855                 ret = iwl_set_tkip_dynamic_key_info(priv, keyconf, sta_id);
 856                 break;
 857         case ALG_WEP:
 858                 ret = iwl_set_wep_dynamic_key_info(priv, keyconf, sta_id);
 859                 break;
 860         default:
 861                 IWL_ERR(priv,
 862                         "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_WARN(priv, "Unknown mode of operation: %d\n",
1075                         priv->iw_mode);
1076                 return priv->hw_params.bcast_sta_id;
1077         }
1078 }
1079 EXPORT_SYMBOL(iwl_get_sta_id);
1080
1081 /**
1082  * iwl_sta_tx_modify_enable_tid - Enable Tx for this TID in station table
1083  */
1084 void iwl_sta_tx_modify_enable_tid(struct iwl_priv *priv, int sta_id, int tid)
1085 {
1086         unsigned long flags;
1087
1088         /* Remove "disable" flag, to enable Tx for this TID */
1089         spin_lock_irqsave(&priv->sta_lock, flags);
1090         priv->stations[sta_id].sta.sta.modify_mask = STA_MODIFY_TID_DISABLE_TX;
1091         priv->stations[sta_id].sta.tid_disable_tx &= cpu_to_le16(~(1 << tid));
1092         priv->stations[sta_id].sta.mode = STA_CONTROL_MODIFY_MSK;
1093         spin_unlock_irqrestore(&priv->sta_lock, flags);
1094
1095         iwl_send_add_sta(priv, &priv->stations[sta_id].sta, CMD_ASYNC);
1096 }
1097 EXPORT_SYMBOL(iwl_sta_tx_modify_enable_tid);
1098
1099 int iwl_sta_rx_agg_start(struct iwl_priv *priv,
1100                          const u8 *addr, int tid, u16 ssn)
1101 {
1102         unsigned long flags;
1103         int sta_id;
1104
1105         sta_id = iwl_find_station(priv, addr);
1106         if (sta_id == IWL_INVALID_STATION)
1107                 return -ENXIO;
1108
1109         spin_lock_irqsave(&priv->sta_lock, flags);
1110         priv->stations[sta_id].sta.station_flags_msk = 0;
1111         priv->stations[sta_id].sta.sta.modify_mask = STA_MODIFY_ADDBA_TID_MSK;
1112         priv->stations[sta_id].sta.add_immediate_ba_tid = (u8)tid;
1113         priv->stations[sta_id].sta.add_immediate_ba_ssn = cpu_to_le16(ssn);
1114         priv->stations[sta_id].sta.mode = STA_CONTROL_MODIFY_MSK;
1115         spin_unlock_irqrestore(&priv->sta_lock, flags);
1116
1117         return iwl_send_add_sta(priv, &priv->stations[sta_id].sta,
1118                                         CMD_ASYNC);
1119 }
1120 EXPORT_SYMBOL(iwl_sta_rx_agg_start);
1121
1122 int iwl_sta_rx_agg_stop(struct iwl_priv *priv, const u8 *addr, int tid)
1123 {
1124         unsigned long flags;
1125         int sta_id;
1126
1127         sta_id = iwl_find_station(priv, addr);
1128         if (sta_id == IWL_INVALID_STATION)
1129                 return -ENXIO;
1130
1131         spin_lock_irqsave(&priv->sta_lock, flags);
1132         priv->stations[sta_id].sta.station_flags_msk = 0;
1133         priv->stations[sta_id].sta.sta.modify_mask = STA_MODIFY_DELBA_TID_MSK;
1134         priv->stations[sta_id].sta.remove_immediate_ba_tid = (u8)tid;
1135         priv->stations[sta_id].sta.mode = STA_CONTROL_MODIFY_MSK;
1136         spin_unlock_irqrestore(&priv->sta_lock, flags);
1137
1138         return iwl_send_add_sta(priv, &priv->stations[sta_id].sta,
1139                                         CMD_ASYNC);
1140 }
1141 EXPORT_SYMBOL(iwl_sta_rx_agg_stop);
1142
1143 static void iwl_sta_modify_ps_wake(struct iwl_priv *priv, int sta_id)
1144 {
1145         unsigned long flags;
1146
1147         spin_lock_irqsave(&priv->sta_lock, flags);
1148         priv->stations[sta_id].sta.station_flags &= ~STA_FLG_PWR_SAVE_MSK;
1149         priv->stations[sta_id].sta.station_flags_msk = STA_FLG_PWR_SAVE_MSK;
1150         priv->stations[sta_id].sta.sta.modify_mask = 0;
1151         priv->stations[sta_id].sta.mode = STA_CONTROL_MODIFY_MSK;
1152         spin_unlock_irqrestore(&priv->sta_lock, flags);
1153
1154         iwl_send_add_sta(priv, &priv->stations[sta_id].sta, CMD_ASYNC);
1155 }
1156
1157 void iwl_update_ps_mode(struct iwl_priv *priv, u16 ps_bit, u8 *addr)
1158 {
1159         /* FIXME: need locking over ps_status ??? */
1160         u8 sta_id = iwl_find_station(priv, addr);
1161
1162         if (sta_id != IWL_INVALID_STATION) {
1163                 u8 sta_awake = priv->stations[sta_id].
1164                                 ps_status == STA_PS_STATUS_WAKE;
1165
1166                 if (sta_awake && ps_bit)
1167                         priv->stations[sta_id].ps_status = STA_PS_STATUS_SLEEP;
1168                 else if (!sta_awake && !ps_bit) {
1169                         iwl_sta_modify_ps_wake(priv, sta_id);
1170                         priv->stations[sta_id].ps_status = STA_PS_STATUS_WAKE;
1171                 }
1172         }
1173 }
1174