SAFE public projects git trees. - safe/jmp/linux-2.6/blob - drivers/net/wireless/iwlwifi/iwl-sta.c

   1 /******************************************************************************
   2  *
   3  * Copyright(c) 2003 - 2009 Intel Corporation. All rights reserved.
   4  *
   5  * Portions of this file are derived from the ipw3945 project, as well
   6  * as portions of the ieee80211 subsystem header files.
   7  *
   8  * This program is free software; you can redistribute it and/or modify it
   9  * under the terms of version 2 of the GNU General Public License as
  10  * published by the Free Software Foundation.
  11  *
  12  * This program is distributed in the hope that it will be useful, but WITHOUT
  13  * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
  14  * FITNESS FOR A PARTICULAR PURPOSE.  See the GNU General Public License for
  15  * more details.
  16  *
  17  * You should have received a copy of the GNU General Public License along with
  18  * this program; if not, write to the Free Software Foundation, Inc.,
  19  * 51 Franklin Street, Fifth Floor, Boston, MA 02110, USA
  20  *
  21  * The full GNU General Public License is included in this distribution in the
  22  * file called LICENSE.
  23  *
  24  * Contact Information:
  25  *  Intel Linux Wireless <ilw@linux.intel.com>
  26  * Intel Corporation, 5200 N.E. Elam Young Parkway, Hillsboro, OR 97124-6497
  27  *
  28  *****************************************************************************/
  29
  30 #include <net/mac80211.h>
  31 #include <linux/etherdevice.h>
  32
  33 #include "iwl-dev.h"
  34 #include "iwl-core.h"
  35 #include "iwl-sta.h"
  36
  37 #define IWL_STA_DRIVER_ACTIVE BIT(0) /* driver entry is active */
  38 #define IWL_STA_UCODE_ACTIVE  BIT(1) /* ucode entry is active */
  39
  40 u8 iwl_find_station(struct iwl_priv *priv, const u8 *addr)
  41 {
  42         int i;
  43         int start = 0;
  44         int ret = IWL_INVALID_STATION;
  45         unsigned long flags;
  46
  47         if ((priv->iw_mode == NL80211_IFTYPE_ADHOC) ||
  48             (priv->iw_mode == NL80211_IFTYPE_AP))
  49                 start = IWL_STA_ID;
  50
  51         if (is_broadcast_ether_addr(addr))
  52                 return priv->hw_params.bcast_sta_id;
  53
  54         spin_lock_irqsave(&priv->sta_lock, flags);
  55         for (i = start; i < priv->hw_params.max_stations; i++)
  56                 if (priv->stations[i].used &&
  57                     (!compare_ether_addr(priv->stations[i].sta.sta.addr,
  58                                          addr))) {
  59                         ret = i;
  60                         goto out;
  61                 }
  62
  63         IWL_DEBUG_ASSOC_LIMIT(priv, "can not find STA %pM total %d\n",
  64                               addr, priv->num_stations);
  65
  66  out:
  67         spin_unlock_irqrestore(&priv->sta_lock, flags);
  68         return ret;
  69 }
  70 EXPORT_SYMBOL(iwl_find_station);
  71
  72 int iwl_get_ra_sta_id(struct iwl_priv *priv, struct ieee80211_hdr *hdr)
  73 {
  74         if (priv->iw_mode == NL80211_IFTYPE_STATION) {
  75                 return IWL_AP_ID;
  76         } else {
  77                 u8 *da = ieee80211_get_DA(hdr);
  78                 return 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(priv, "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_device_cmd *cmd,
 102                                 struct sk_buff *skb)
 103 {
 104         struct iwl_rx_packet *res = NULL;
 105         struct iwl_addsta_cmd *addsta =
 106                 (struct iwl_addsta_cmd *)cmd->cmd.payload;
 107         u8 sta_id = addsta->sta.sta_id;
 108
 109         if (!skb) {
 110                 IWL_ERR(priv, "Error: Response NULL in REPLY_ADD_STA.\n");
 111                 return 1;
 112         }
 113
 114         res = (struct iwl_rx_packet *)skb->data;
 115         if (res->hdr.flags & IWL_CMD_FAILED_MSK) {
 116                 IWL_ERR(priv, "Bad return from REPLY_ADD_STA (0x%08X)\n",
 117                           res->hdr.flags);
 118                 return 1;
 119         }
 120
 121         switch (res->u.add_sta.status) {
 122         case ADD_STA_SUCCESS_MSK:
 123                 iwl_sta_ucode_activate(priv, sta_id);
 124                  /* fall through */
 125         default:
 126                 IWL_DEBUG_HC(priv, "Received REPLY_ADD_STA:(0x%08X)\n",
 127                              res->u.add_sta.status);
 128                 break;
 129         }
 130
 131         /* We didn't cache the SKB; let the caller free it */
 132         return 1;
 133 }
 134
 135 int iwl_send_add_sta(struct iwl_priv *priv,
 136                      struct iwl_addsta_cmd *sta, u8 flags)
 137 {
 138         struct iwl_rx_packet *res = NULL;
 139         int ret = 0;
 140         u8 data[sizeof(*sta)];
 141         struct iwl_host_cmd cmd = {
 142                 .id = REPLY_ADD_STA,
 143                 .flags = flags,
 144                 .data = data,
 145         };
 146
 147         if (flags & CMD_ASYNC)
 148                 cmd.callback = iwl_add_sta_callback;
 149         else
 150                 cmd.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.reply_skb->data;
 159         if (res->hdr.flags & IWL_CMD_FAILED_MSK) {
 160                 IWL_ERR(priv, "Bad return from REPLY_ADD_STA (0x%08X)\n",
 161                           res->hdr.flags);
 162                 ret = -EIO;
 163         }
 164
 165         if (ret == 0) {
 166                 switch (res->u.add_sta.status) {
 167                 case ADD_STA_SUCCESS_MSK:
 168                         iwl_sta_ucode_activate(priv, sta->sta.sta_id);
 169                         IWL_DEBUG_INFO(priv, "REPLY_ADD_STA PASSED\n");
 170                         break;
 171                 default:
 172                         ret = -EIO;
 173                         IWL_WARN(priv, "REPLY_ADD_STA failed\n");
 174                         break;
 175                 }
 176         }
 177
 178         priv->alloc_rxb_skb--;
 179         dev_kfree_skb_any(cmd.reply_skb);
 180
 181         return ret;
 182 }
 183 EXPORT_SYMBOL(iwl_send_add_sta);
 184
 185 static void iwl_set_ht_add_station(struct iwl_priv *priv, u8 index,
 186                                    struct ieee80211_sta_ht_cap *sta_ht_inf)
 187 {
 188         __le32 sta_flags;
 189         u8 mimo_ps_mode;
 190
 191         if (!sta_ht_inf || !sta_ht_inf->ht_supported)
 192                 goto done;
 193
 194         mimo_ps_mode = (sta_ht_inf->cap & IEEE80211_HT_CAP_SM_PS) >> 2;
 195
 196         sta_flags = priv->stations[index].sta.station_flags;
 197
 198         sta_flags &= ~(STA_FLG_RTS_MIMO_PROT_MSK | STA_FLG_MIMO_DIS_MSK);
 199
 200         switch (mimo_ps_mode) {
 201         case WLAN_HT_CAP_SM_PS_STATIC:
 202                 sta_flags |= STA_FLG_MIMO_DIS_MSK;
 203                 break;
 204         case WLAN_HT_CAP_SM_PS_DYNAMIC:
 205                 sta_flags |= STA_FLG_RTS_MIMO_PROT_MSK;
 206                 break;
 207         case WLAN_HT_CAP_SM_PS_DISABLED:
 208                 break;
 209         default:
 210                 IWL_WARN(priv, "Invalid MIMO PS mode %d\n", mimo_ps_mode);
 211                 break;
 212         }
 213
 214         sta_flags |= cpu_to_le32(
 215               (u32)sta_ht_inf->ampdu_factor << STA_FLG_MAX_AGG_SIZE_POS);
 216
 217         sta_flags |= cpu_to_le32(
 218               (u32)sta_ht_inf->ampdu_density << STA_FLG_AGG_MPDU_DENSITY_POS);
 219
 220         if (iwl_is_fat_tx_allowed(priv, sta_ht_inf))
 221                 sta_flags |= STA_FLG_FAT_EN_MSK;
 222         else
 223                 sta_flags &= ~STA_FLG_FAT_EN_MSK;
 224
 225         priv->stations[index].sta.station_flags = sta_flags;
 226  done:
 227         return;
 228 }
 229
 230 /**
 231  * iwl_add_station - Add station to tables in driver and device
 232  */
 233 u8 iwl_add_station(struct iwl_priv *priv, const u8 *addr, bool is_ap, u8 flags,
 234                 struct ieee80211_sta_ht_cap *ht_info)
 235 {
 236         struct iwl_station_entry *station;
 237         unsigned long flags_spin;
 238         int i;
 239         int sta_id = IWL_INVALID_STATION;
 240         u16 rate;
 241
 242         spin_lock_irqsave(&priv->sta_lock, flags_spin);
 243         if (is_ap)
 244                 sta_id = IWL_AP_ID;
 245         else if (is_broadcast_ether_addr(addr))
 246                 sta_id = priv->hw_params.bcast_sta_id;
 247         else
 248                 for (i = IWL_STA_ID; i < priv->hw_params.max_stations; i++) {
 249                         if (!compare_ether_addr(priv->stations[i].sta.sta.addr,
 250                                                 addr)) {
 251                                 sta_id = i;
 252                                 break;
 253                         }
 254
 255                         if (!priv->stations[i].used &&
 256                             sta_id == IWL_INVALID_STATION)
 257                                 sta_id = i;
 258                 }
 259
 260         /* These two conditions have the same outcome, but keep them separate
 261            since they have different meanings */
 262         if (unlikely(sta_id == IWL_INVALID_STATION)) {
 263                 spin_unlock_irqrestore(&priv->sta_lock, flags_spin);
 264                 return sta_id;
 265         }
 266
 267         if (priv->stations[sta_id].used &&
 268             !compare_ether_addr(priv->stations[sta_id].sta.sta.addr, addr)) {
 269                 spin_unlock_irqrestore(&priv->sta_lock, flags_spin);
 270                 return sta_id;
 271         }
 272
 273
 274         station = &priv->stations[sta_id];
 275         station->used = IWL_STA_DRIVER_ACTIVE;
 276         IWL_DEBUG_ASSOC(priv, "Add STA to driver ID %d: %pM\n",
 277                         sta_id, addr);
 278         priv->num_stations++;
 279
 280         /* Set up the REPLY_ADD_STA command to send to device */
 281         memset(&station->sta, 0, sizeof(struct iwl_addsta_cmd));
 282         memcpy(station->sta.sta.addr, addr, ETH_ALEN);
 283         station->sta.mode = 0;
 284         station->sta.sta.sta_id = sta_id;
 285         station->sta.station_flags = 0;
 286
 287         /* BCAST station and IBSS stations do not work in HT mode */
 288         if (sta_id != priv->hw_params.bcast_sta_id &&
 289             priv->iw_mode != NL80211_IFTYPE_ADHOC)
 290                 iwl_set_ht_add_station(priv, sta_id, ht_info);
 291
 292         /* 3945 only */
 293         rate = (priv->band == IEEE80211_BAND_5GHZ) ?
 294                 IWL_RATE_6M_PLCP : IWL_RATE_1M_PLCP;
 295         /* Turn on both antennas for the station... */
 296         station->sta.rate_n_flags = cpu_to_le16(rate | RATE_MCS_ANT_AB_MSK);
 297
 298         spin_unlock_irqrestore(&priv->sta_lock, flags_spin);
 299
 300         /* Add station to device's station table */
 301         iwl_send_add_sta(priv, &station->sta, flags);
 302         return sta_id;
 303
 304 }
 305 EXPORT_SYMBOL(iwl_add_station);
 306
 307 static void iwl_sta_ucode_deactivate(struct iwl_priv *priv, const char *addr)
 308 {
 309         unsigned long flags;
 310         u8 sta_id = iwl_find_station(priv, addr);
 311
 312         BUG_ON(sta_id == IWL_INVALID_STATION);
 313
 314         IWL_DEBUG_ASSOC(priv, "Removed STA from Ucode: %pM\n", addr);
 315
 316         spin_lock_irqsave(&priv->sta_lock, flags);
 317
 318         /* Ucode must be active and driver must be non active */
 319         if (priv->stations[sta_id].used != IWL_STA_UCODE_ACTIVE)
 320                 IWL_ERR(priv, "removed non active STA %d\n", sta_id);
 321
 322         priv->stations[sta_id].used &= ~IWL_STA_UCODE_ACTIVE;
 323
 324         memset(&priv->stations[sta_id], 0, sizeof(struct iwl_station_entry));
 325         spin_unlock_irqrestore(&priv->sta_lock, flags);
 326 }
 327
 328 static int iwl_remove_sta_callback(struct iwl_priv *priv,
 329                                    struct iwl_device_cmd *cmd,
 330                                    struct sk_buff *skb)
 331 {
 332         struct iwl_rx_packet *res = NULL;
 333         struct iwl_rem_sta_cmd *rm_sta =
 334                  (struct iwl_rem_sta_cmd *)cmd->cmd.payload;
 335         const char *addr = rm_sta->addr;
 336
 337         if (!skb) {
 338                 IWL_ERR(priv, "Error: Response NULL in REPLY_REMOVE_STA.\n");
 339                 return 1;
 340         }
 341
 342         res = (struct iwl_rx_packet *)skb->data;
 343         if (res->hdr.flags & IWL_CMD_FAILED_MSK) {
 344                 IWL_ERR(priv, "Bad return from REPLY_REMOVE_STA (0x%08X)\n",
 345                 res->hdr.flags);
 346                 return 1;
 347         }
 348
 349         switch (res->u.rem_sta.status) {
 350         case REM_STA_SUCCESS_MSK:
 351                 iwl_sta_ucode_deactivate(priv, addr);
 352                 break;
 353         default:
 354                 IWL_ERR(priv, "REPLY_REMOVE_STA failed\n");
 355                 break;
 356         }
 357
 358         /* We didn't cache the SKB; let the caller free it */
 359         return 1;
 360 }
 361
 362 static int iwl_send_remove_station(struct iwl_priv *priv, const u8 *addr,
 363                                    u8 flags)
 364 {
 365         struct iwl_rx_packet *res = NULL;
 366         int ret;
 367
 368         struct iwl_rem_sta_cmd rm_sta_cmd;
 369
 370         struct iwl_host_cmd cmd = {
 371                 .id = REPLY_REMOVE_STA,
 372                 .len = sizeof(struct iwl_rem_sta_cmd),
 373                 .flags = flags,
 374                 .data = &rm_sta_cmd,
 375         };
 376
 377         memset(&rm_sta_cmd, 0, sizeof(rm_sta_cmd));
 378         rm_sta_cmd.num_sta = 1;
 379         memcpy(&rm_sta_cmd.addr, addr , ETH_ALEN);
 380
 381         if (flags & CMD_ASYNC)
 382                 cmd.callback = iwl_remove_sta_callback;
 383         else
 384                 cmd.flags |= CMD_WANT_SKB;
 385         ret = iwl_send_cmd(priv, &cmd);
 386
 387         if (ret || (flags & CMD_ASYNC))
 388                 return ret;
 389
 390         res = (struct iwl_rx_packet *)cmd.reply_skb->data;
 391         if (res->hdr.flags & IWL_CMD_FAILED_MSK) {
 392                 IWL_ERR(priv, "Bad return from REPLY_REMOVE_STA (0x%08X)\n",
 393                           res->hdr.flags);
 394                 ret = -EIO;
 395         }
 396
 397         if (!ret) {
 398                 switch (res->u.rem_sta.status) {
 399                 case REM_STA_SUCCESS_MSK:
 400                         iwl_sta_ucode_deactivate(priv, addr);
 401                         IWL_DEBUG_ASSOC(priv, "REPLY_REMOVE_STA PASSED\n");
 402                         break;
 403                 default:
 404                         ret = -EIO;
 405                         IWL_ERR(priv, "REPLY_REMOVE_STA failed\n");
 406                         break;
 407                 }
 408         }
 409
 410         priv->alloc_rxb_skb--;
 411         dev_kfree_skb_any(cmd.reply_skb);
 412
 413         return ret;
 414 }
 415
 416 /**
 417  * iwl_remove_station - Remove driver's knowledge of station.
 418  */
 419 int iwl_remove_station(struct iwl_priv *priv, const u8 *addr, bool is_ap)
 420 {
 421         int sta_id = IWL_INVALID_STATION;
 422         int i, ret = -EINVAL;
 423         unsigned long flags;
 424
 425         spin_lock_irqsave(&priv->sta_lock, flags);
 426
 427         if (is_ap)
 428                 sta_id = IWL_AP_ID;
 429         else if (is_broadcast_ether_addr(addr))
 430                 sta_id = priv->hw_params.bcast_sta_id;
 431         else
 432                 for (i = IWL_STA_ID; i < priv->hw_params.max_stations; i++)
 433                         if (priv->stations[i].used &&
 434                             !compare_ether_addr(priv->stations[i].sta.sta.addr,
 435                                                 addr)) {
 436                                 sta_id = i;
 437                                 break;
 438                         }
 439
 440         if (unlikely(sta_id == IWL_INVALID_STATION))
 441                 goto out;
 442
 443         IWL_DEBUG_ASSOC(priv, "Removing STA from driver:%d  %pM\n",
 444                 sta_id, addr);
 445
 446         if (!(priv->stations[sta_id].used & IWL_STA_DRIVER_ACTIVE)) {
 447                 IWL_ERR(priv, "Removing %pM but non DRIVER active\n",
 448                                 addr);
 449                 goto out;
 450         }
 451
 452         if (!(priv->stations[sta_id].used & IWL_STA_UCODE_ACTIVE)) {
 453                 IWL_ERR(priv, "Removing %pM but non UCODE active\n",
 454                                 addr);
 455                 goto out;
 456         }
 457
 458
 459         priv->stations[sta_id].used &= ~IWL_STA_DRIVER_ACTIVE;
 460
 461         priv->num_stations--;
 462
 463         BUG_ON(priv->num_stations < 0);
 464
 465         spin_unlock_irqrestore(&priv->sta_lock, flags);
 466
 467         ret = iwl_send_remove_station(priv, addr, CMD_ASYNC);
 468         return ret;
 469 out:
 470         spin_unlock_irqrestore(&priv->sta_lock, flags);
 471         return ret;
 472 }
 473 EXPORT_SYMBOL(iwl_remove_station);
 474
 475 /**
 476  * iwl_clear_stations_table - Clear the driver's station table
 477  *
 478  * NOTE:  This does not clear or otherwise alter the device's station table.
 479  */
 480 void iwl_clear_stations_table(struct iwl_priv *priv)
 481 {
 482         unsigned long flags;
 483         int i;
 484
 485         spin_lock_irqsave(&priv->sta_lock, flags);
 486
 487         if (iwl_is_alive(priv) &&
 488            !test_bit(STATUS_EXIT_PENDING, &priv->status) &&
 489            iwl_send_cmd_pdu_async(priv, REPLY_REMOVE_ALL_STA, 0, NULL, NULL))
 490                 IWL_ERR(priv, "Couldn't clear the station table\n");
 491
 492         priv->num_stations = 0;
 493         memset(priv->stations, 0, sizeof(priv->stations));
 494
 495         /* clean ucode key table bit map */
 496         priv->ucode_key_table = 0;
 497
 498         /* keep track of static keys */
 499         for (i = 0; i < WEP_KEYS_MAX ; i++) {
 500                 if (priv->wep_keys[i].key_size)
 501                         set_bit(i, &priv->ucode_key_table);
 502         }
 503
 504         spin_unlock_irqrestore(&priv->sta_lock, flags);
 505 }
 506 EXPORT_SYMBOL(iwl_clear_stations_table);
 507
 508 int iwl_get_free_ucode_key_index(struct iwl_priv *priv)
 509 {
 510         int i;
 511
 512         for (i = 0; i < STA_KEY_MAX_NUM; i++)
 513                 if (!test_and_set_bit(i, &priv->ucode_key_table))
 514                         return i;
 515
 516         return WEP_INVALID_OFFSET;
 517 }
 518 EXPORT_SYMBOL(iwl_get_free_ucode_key_index);
 519
 520 int iwl_send_static_wepkey_cmd(struct iwl_priv *priv, u8 send_if_empty)
 521 {
 522         int i, not_empty = 0;
 523         u8 buff[sizeof(struct iwl_wep_cmd) +
 524                 sizeof(struct iwl_wep_key) * WEP_KEYS_MAX];
 525         struct iwl_wep_cmd *wep_cmd = (struct iwl_wep_cmd *)buff;
 526         size_t cmd_size  = sizeof(struct iwl_wep_cmd);
 527         struct iwl_host_cmd cmd = {
 528                 .id = REPLY_WEPKEY,
 529                 .data = wep_cmd,
 530                 .flags = CMD_ASYNC,
 531         };
 532
 533         memset(wep_cmd, 0, cmd_size +
 534                         (sizeof(struct iwl_wep_key) * WEP_KEYS_MAX));
 535
 536         for (i = 0; i < WEP_KEYS_MAX ; i++) {
 537                 wep_cmd->key[i].key_index = i;
 538                 if (priv->wep_keys[i].key_size) {
 539                         wep_cmd->key[i].key_offset = i;
 540                         not_empty = 1;
 541                 } else {
 542                         wep_cmd->key[i].key_offset = WEP_INVALID_OFFSET;
 543                 }
 544
 545                 wep_cmd->key[i].key_size = priv->wep_keys[i].key_size;
 546                 memcpy(&wep_cmd->key[i].key[3], priv->wep_keys[i].key,
 547                                 priv->wep_keys[i].key_size);
 548         }
 549
 550         wep_cmd->global_key_type = WEP_KEY_WEP_TYPE;
 551         wep_cmd->num_keys = WEP_KEYS_MAX;
 552
 553         cmd_size += sizeof(struct iwl_wep_key) * WEP_KEYS_MAX;
 554
 555         cmd.len = cmd_size;
 556
 557         if (not_empty || send_if_empty)
 558                 return iwl_send_cmd(priv, &cmd);
 559         else
 560                 return 0;
 561 }
 562 EXPORT_SYMBOL(iwl_send_static_wepkey_cmd);
 563
 564 int iwl_remove_default_wep_key(struct iwl_priv *priv,
 565                                struct ieee80211_key_conf *keyconf)
 566 {
 567         int ret;
 568         unsigned long flags;
 569
 570         spin_lock_irqsave(&priv->sta_lock, flags);
 571         IWL_DEBUG_WEP(priv, "Removing default WEP key: idx=%d\n",
 572                       keyconf->keyidx);
 573
 574         if (!test_and_clear_bit(keyconf->keyidx, &priv->ucode_key_table))
 575                 IWL_ERR(priv, "index %d not used in uCode key table.\n",
 576                           keyconf->keyidx);
 577
 578         priv->default_wep_key--;
 579         memset(&priv->wep_keys[keyconf->keyidx], 0, sizeof(priv->wep_keys[0]));
 580         if (iwl_is_rfkill(priv)) {
 581                 IWL_DEBUG_WEP(priv, "Not sending REPLY_WEPKEY command due to RFKILL.\n");
 582                 spin_unlock_irqrestore(&priv->sta_lock, flags);
 583                 return 0;
 584         }
 585         ret = iwl_send_static_wepkey_cmd(priv, 1);
 586         IWL_DEBUG_WEP(priv, "Remove default WEP key: idx=%d ret=%d\n",
 587                       keyconf->keyidx, ret);
 588         spin_unlock_irqrestore(&priv->sta_lock, flags);
 589
 590         return ret;
 591 }
 592 EXPORT_SYMBOL(iwl_remove_default_wep_key);
 593
 594 int iwl_set_default_wep_key(struct iwl_priv *priv,
 595                             struct ieee80211_key_conf *keyconf)
 596 {
 597         int ret;
 598         unsigned long flags;
 599
 600         if (keyconf->keylen != WEP_KEY_LEN_128 &&
 601             keyconf->keylen != WEP_KEY_LEN_64) {
 602                 IWL_DEBUG_WEP(priv, "Bad WEP key length %d\n", keyconf->keylen);
 603                 return -EINVAL;
 604         }
 605
 606         keyconf->flags &= ~IEEE80211_KEY_FLAG_GENERATE_IV;
 607         keyconf->hw_key_idx = HW_KEY_DEFAULT;
 608         priv->stations[IWL_AP_ID].keyinfo.alg = ALG_WEP;
 609
 610         spin_lock_irqsave(&priv->sta_lock, flags);
 611         priv->default_wep_key++;
 612
 613         if (test_and_set_bit(keyconf->keyidx, &priv->ucode_key_table))
 614                 IWL_ERR(priv, "index %d already used in uCode key table.\n",
 615                         keyconf->keyidx);
 616
 617         priv->wep_keys[keyconf->keyidx].key_size = keyconf->keylen;
 618         memcpy(&priv->wep_keys[keyconf->keyidx].key, &keyconf->key,
 619                                                         keyconf->keylen);
 620
 621         ret = iwl_send_static_wepkey_cmd(priv, 0);
 622         IWL_DEBUG_WEP(priv, "Set default WEP key: len=%d idx=%d ret=%d\n",
 623                 keyconf->keylen, keyconf->keyidx, ret);
 624         spin_unlock_irqrestore(&priv->sta_lock, flags);
 625
 626         return ret;
 627 }
 628 EXPORT_SYMBOL(iwl_set_default_wep_key);
 629
 630 static int iwl_set_wep_dynamic_key_info(struct iwl_priv *priv,
 631                                 struct ieee80211_key_conf *keyconf,
 632                                 u8 sta_id)
 633 {
 634         unsigned long flags;
 635         __le16 key_flags = 0;
 636         int ret;
 637
 638         keyconf->flags &= ~IEEE80211_KEY_FLAG_GENERATE_IV;
 639
 640         key_flags |= (STA_KEY_FLG_WEP | STA_KEY_FLG_MAP_KEY_MSK);
 641         key_flags |= cpu_to_le16(keyconf->keyidx << STA_KEY_FLG_KEYID_POS);
 642         key_flags &= ~STA_KEY_FLG_INVALID;
 643
 644         if (keyconf->keylen == WEP_KEY_LEN_128)
 645                 key_flags |= STA_KEY_FLG_KEY_SIZE_MSK;
 646
 647         if (sta_id == priv->hw_params.bcast_sta_id)
 648                 key_flags |= STA_KEY_MULTICAST_MSK;
 649
 650         spin_lock_irqsave(&priv->sta_lock, flags);
 651
 652         priv->stations[sta_id].keyinfo.alg = keyconf->alg;
 653         priv->stations[sta_id].keyinfo.keylen = keyconf->keylen;
 654         priv->stations[sta_id].keyinfo.keyidx = keyconf->keyidx;
 655
 656         memcpy(priv->stations[sta_id].keyinfo.key,
 657                                 keyconf->key, keyconf->keylen);
 658
 659         memcpy(&priv->stations[sta_id].sta.key.key[3],
 660                                 keyconf->key, keyconf->keylen);
 661
 662         if ((priv->stations[sta_id].sta.key.key_flags & STA_KEY_FLG_ENCRYPT_MSK)
 663                         == STA_KEY_FLG_NO_ENC)
 664                 priv->stations[sta_id].sta.key.key_offset =
 665                                  iwl_get_free_ucode_key_index(priv);
 666         /* else, we are overriding an existing key => no need to allocated room
 667          * in uCode. */
 668
 669         WARN(priv->stations[sta_id].sta.key.key_offset == WEP_INVALID_OFFSET,
 670                 "no space for a new key");
 671
 672         priv->stations[sta_id].sta.key.key_flags = key_flags;
 673         priv->stations[sta_id].sta.sta.modify_mask = STA_MODIFY_KEY_MASK;
 674         priv->stations[sta_id].sta.mode = STA_CONTROL_MODIFY_MSK;
 675
 676         ret = iwl_send_add_sta(priv, &priv->stations[sta_id].sta, CMD_ASYNC);
 677
 678         spin_unlock_irqrestore(&priv->sta_lock, flags);
 679
 680         return ret;
 681 }
 682
 683 static int iwl_set_ccmp_dynamic_key_info(struct iwl_priv *priv,
 684                                    struct ieee80211_key_conf *keyconf,
 685                                    u8 sta_id)
 686 {
 687         unsigned long flags;
 688         __le16 key_flags = 0;
 689         int ret;
 690
 691         key_flags |= (STA_KEY_FLG_CCMP | STA_KEY_FLG_MAP_KEY_MSK);
 692         key_flags |= cpu_to_le16(keyconf->keyidx << STA_KEY_FLG_KEYID_POS);
 693         key_flags &= ~STA_KEY_FLG_INVALID;
 694
 695         if (sta_id == priv->hw_params.bcast_sta_id)
 696                 key_flags |= STA_KEY_MULTICAST_MSK;
 697
 698         keyconf->flags |= IEEE80211_KEY_FLAG_GENERATE_IV;
 699
 700         spin_lock_irqsave(&priv->sta_lock, flags);
 701         priv->stations[sta_id].keyinfo.alg = keyconf->alg;
 702         priv->stations[sta_id].keyinfo.keylen = keyconf->keylen;
 703
 704         memcpy(priv->stations[sta_id].keyinfo.key, keyconf->key,
 705                keyconf->keylen);
 706
 707         memcpy(priv->stations[sta_id].sta.key.key, keyconf->key,
 708                keyconf->keylen);
 709
 710         if ((priv->stations[sta_id].sta.key.key_flags & STA_KEY_FLG_ENCRYPT_MSK)
 711                         == STA_KEY_FLG_NO_ENC)
 712                 priv->stations[sta_id].sta.key.key_offset =
 713                                  iwl_get_free_ucode_key_index(priv);
 714         /* else, we are overriding an existing key => no need to allocated room
 715          * in uCode. */
 716
 717         WARN(priv->stations[sta_id].sta.key.key_offset == WEP_INVALID_OFFSET,
 718                 "no space for a new key");
 719
 720         priv->stations[sta_id].sta.key.key_flags = key_flags;
 721         priv->stations[sta_id].sta.sta.modify_mask = STA_MODIFY_KEY_MASK;
 722         priv->stations[sta_id].sta.mode = STA_CONTROL_MODIFY_MSK;
 723
 724         ret = iwl_send_add_sta(priv, &priv->stations[sta_id].sta, CMD_ASYNC);
 725
 726         spin_unlock_irqrestore(&priv->sta_lock, flags);
 727
 728         return ret;
 729 }
 730
 731 static int iwl_set_tkip_dynamic_key_info(struct iwl_priv *priv,
 732                                    struct ieee80211_key_conf *keyconf,
 733                                    u8 sta_id)
 734 {
 735         unsigned long flags;
 736         int ret = 0;
 737         __le16 key_flags = 0;
 738
 739         key_flags |= (STA_KEY_FLG_TKIP | STA_KEY_FLG_MAP_KEY_MSK);
 740         key_flags |= cpu_to_le16(keyconf->keyidx << STA_KEY_FLG_KEYID_POS);
 741         key_flags &= ~STA_KEY_FLG_INVALID;
 742
 743         if (sta_id == priv->hw_params.bcast_sta_id)
 744                 key_flags |= STA_KEY_MULTICAST_MSK;
 745
 746         keyconf->flags |= IEEE80211_KEY_FLAG_GENERATE_IV;
 747         keyconf->flags |= IEEE80211_KEY_FLAG_GENERATE_MMIC;
 748
 749         spin_lock_irqsave(&priv->sta_lock, flags);
 750
 751         priv->stations[sta_id].keyinfo.alg = keyconf->alg;
 752         priv->stations[sta_id].keyinfo.keylen = 16;
 753
 754         if ((priv->stations[sta_id].sta.key.key_flags & STA_KEY_FLG_ENCRYPT_MSK)
 755                         == STA_KEY_FLG_NO_ENC)
 756                 priv->stations[sta_id].sta.key.key_offset =
 757                                  iwl_get_free_ucode_key_index(priv);
 758         /* else, we are overriding an existing key => no need to allocated room
 759          * in uCode. */
 760
 761         WARN(priv->stations[sta_id].sta.key.key_offset == WEP_INVALID_OFFSET,
 762                 "no space for a new key");
 763
 764         priv->stations[sta_id].sta.key.key_flags = key_flags;
 765
 766
 767         /* This copy is acutally not needed: we get the key with each TX */
 768         memcpy(priv->stations[sta_id].keyinfo.key, keyconf->key, 16);
 769
 770         memcpy(priv->stations[sta_id].sta.key.key, keyconf->key, 16);
 771
 772         spin_unlock_irqrestore(&priv->sta_lock, flags);
 773
 774         return ret;
 775 }
 776
 777 void iwl_update_tkip_key(struct iwl_priv *priv,
 778                         struct ieee80211_key_conf *keyconf,
 779                         const u8 *addr, u32 iv32, u16 *phase1key)
 780 {
 781         u8 sta_id = IWL_INVALID_STATION;
 782         unsigned long flags;
 783         int i;
 784
 785         sta_id = iwl_find_station(priv, addr);
 786         if (sta_id == IWL_INVALID_STATION) {
 787                 IWL_DEBUG_MAC80211(priv, "leave - %pM not in station map.\n",
 788                                    addr);
 789                 return;
 790         }
 791
 792         if (iwl_scan_cancel(priv)) {
 793                 /* cancel scan failed, just live w/ bad key and rely
 794                    briefly on SW decryption */
 795                 return;
 796         }
 797
 798         spin_lock_irqsave(&priv->sta_lock, flags);
 799
 800         priv->stations[sta_id].sta.key.tkip_rx_tsc_byte2 = (u8) iv32;
 801
 802         for (i = 0; i < 5; i++)
 803                 priv->stations[sta_id].sta.key.tkip_rx_ttak[i] =
 804                         cpu_to_le16(phase1key[i]);
 805
 806         priv->stations[sta_id].sta.sta.modify_mask = STA_MODIFY_KEY_MASK;
 807         priv->stations[sta_id].sta.mode = STA_CONTROL_MODIFY_MSK;
 808
 809         iwl_send_add_sta(priv, &priv->stations[sta_id].sta, CMD_ASYNC);
 810
 811         spin_unlock_irqrestore(&priv->sta_lock, flags);
 812
 813 }
 814 EXPORT_SYMBOL(iwl_update_tkip_key);
 815
 816 int iwl_remove_dynamic_key(struct iwl_priv *priv,
 817                                 struct ieee80211_key_conf *keyconf,
 818                                 u8 sta_id)
 819 {
 820         unsigned long flags;
 821         int ret = 0;
 822         u16 key_flags;
 823         u8 keyidx;
 824
 825         priv->key_mapping_key--;
 826
 827         spin_lock_irqsave(&priv->sta_lock, flags);
 828         key_flags = le16_to_cpu(priv->stations[sta_id].sta.key.key_flags);
 829         keyidx = (key_flags >> STA_KEY_FLG_KEYID_POS) & 0x3;
 830
 831         IWL_DEBUG_WEP(priv, "Remove dynamic key: idx=%d sta=%d\n",
 832                       keyconf->keyidx, sta_id);
 833
 834         if (keyconf->keyidx != keyidx) {
 835                 /* We need to remove a key with index different that the one
 836                  * in the uCode. This means that the key we need to remove has
 837                  * been replaced by another one with different index.
 838                  * Don't do anything and return ok
 839                  */
 840                 spin_unlock_irqrestore(&priv->sta_lock, flags);
 841                 return 0;
 842         }
 843
 844         if (priv->stations[sta_id].sta.key.key_offset == WEP_INVALID_OFFSET) {
 845                 IWL_WARN(priv, "Removing wrong key %d 0x%x\n",
 846                             keyconf->keyidx, key_flags);
 847                 spin_unlock_irqrestore(&priv->sta_lock, flags);
 848                 return 0;
 849         }
 850
 851         if (!test_and_clear_bit(priv->stations[sta_id].sta.key.key_offset,
 852                 &priv->ucode_key_table))
 853                 IWL_ERR(priv, "index %d not used in uCode key table.\n",
 854                         priv->stations[sta_id].sta.key.key_offset);
 855         memset(&priv->stations[sta_id].keyinfo, 0,
 856                                         sizeof(struct iwl_hw_key));
 857         memset(&priv->stations[sta_id].sta.key, 0,
 858                                         sizeof(struct iwl4965_keyinfo));
 859         priv->stations[sta_id].sta.key.key_flags =
 860                         STA_KEY_FLG_NO_ENC | STA_KEY_FLG_INVALID;
 861         priv->stations[sta_id].sta.key.key_offset = WEP_INVALID_OFFSET;
 862         priv->stations[sta_id].sta.sta.modify_mask = STA_MODIFY_KEY_MASK;
 863         priv->stations[sta_id].sta.mode = STA_CONTROL_MODIFY_MSK;
 864
 865         if (iwl_is_rfkill(priv)) {
 866                 IWL_DEBUG_WEP(priv, "Not sending REPLY_ADD_STA command because RFKILL enabled. \n");
 867                 spin_unlock_irqrestore(&priv->sta_lock, flags);
 868                 return 0;
 869         }
 870         ret =  iwl_send_add_sta(priv, &priv->stations[sta_id].sta, CMD_ASYNC);
 871         spin_unlock_irqrestore(&priv->sta_lock, flags);
 872         return ret;
 873 }
 874 EXPORT_SYMBOL(iwl_remove_dynamic_key);
 875
 876 int iwl_set_dynamic_key(struct iwl_priv *priv,
 877                                 struct ieee80211_key_conf *keyconf, u8 sta_id)
 878 {
 879         int ret;
 880
 881         priv->key_mapping_key++;
 882         keyconf->hw_key_idx = HW_KEY_DYNAMIC;
 883
 884         switch (keyconf->alg) {
 885         case ALG_CCMP:
 886                 ret = iwl_set_ccmp_dynamic_key_info(priv, keyconf, sta_id);
 887                 break;
 888         case ALG_TKIP:
 889                 ret = iwl_set_tkip_dynamic_key_info(priv, keyconf, sta_id);
 890                 break;
 891         case ALG_WEP:
 892                 ret = iwl_set_wep_dynamic_key_info(priv, keyconf, sta_id);
 893                 break;
 894         default:
 895                 IWL_ERR(priv,
 896                         "Unknown alg: %s alg = %d\n", __func__, keyconf->alg);
 897                 ret = -EINVAL;
 898         }
 899
 900         IWL_DEBUG_WEP(priv, "Set dynamic key: alg= %d len=%d idx=%d sta=%d ret=%d\n",
 901                       keyconf->alg, keyconf->keylen, keyconf->keyidx,
 902                       sta_id, ret);
 903
 904         return ret;
 905 }
 906 EXPORT_SYMBOL(iwl_set_dynamic_key);
 907
 908 #ifdef CONFIG_IWLWIFI_DEBUG
 909 static void iwl_dump_lq_cmd(struct iwl_priv *priv,
 910                            struct iwl_link_quality_cmd *lq)
 911 {
 912         int i;
 913         IWL_DEBUG_RATE(priv, "lq station id 0x%x\n", lq->sta_id);
 914         IWL_DEBUG_RATE(priv, "lq ant 0x%X 0x%X\n",
 915                        lq->general_params.single_stream_ant_msk,
 916                        lq->general_params.dual_stream_ant_msk);
 917
 918         for (i = 0; i < LINK_QUAL_MAX_RETRY_NUM; i++)
 919                 IWL_DEBUG_RATE(priv, "lq index %d 0x%X\n",
 920                                i, lq->rs_table[i].rate_n_flags);
 921 }
 922 #else
 923 static inline void iwl_dump_lq_cmd(struct iwl_priv *priv,
 924                                    struct iwl_link_quality_cmd *lq)
 925 {
 926 }
 927 #endif
 928
 929 int iwl_send_lq_cmd(struct iwl_priv *priv,
 930                     struct iwl_link_quality_cmd *lq, u8 flags)
 931 {
 932         struct iwl_host_cmd cmd = {
 933                 .id = REPLY_TX_LINK_QUALITY_CMD,
 934                 .len = sizeof(struct iwl_link_quality_cmd),
 935                 .flags = flags,
 936                 .data = lq,
 937         };
 938
 939         if ((lq->sta_id == 0xFF) &&
 940             (priv->iw_mode == NL80211_IFTYPE_ADHOC))
 941                 return -EINVAL;
 942
 943         if (lq->sta_id == 0xFF)
 944                 lq->sta_id = IWL_AP_ID;
 945
 946         iwl_dump_lq_cmd(priv, lq);
 947
 948         if (iwl_is_associated(priv) && priv->assoc_station_added)
 949                 return  iwl_send_cmd(priv, &cmd);
 950
 951         return 0;
 952 }
 953 EXPORT_SYMBOL(iwl_send_lq_cmd);
 954
 955 /**
 956  * iwl_sta_init_lq - Initialize a station's hardware rate table
 957  *
 958  * The uCode's station table contains a table of fallback rates
 959  * for automatic fallback during transmission.
 960  *
 961  * NOTE: This sets up a default set of values.  These will be replaced later
 962  *       if the driver's iwl-agn-rs rate scaling algorithm is used, instead of
 963  *       rc80211_simple.
 964  *
 965  * NOTE: Run REPLY_ADD_STA command to set up station table entry, before
 966  *       calling this function (which runs REPLY_TX_LINK_QUALITY_CMD,
 967  *       which requires station table entry to exist).
 968  */
 969 static void iwl_sta_init_lq(struct iwl_priv *priv, const u8 *addr, bool is_ap)
 970 {
 971         int i, r;
 972         struct iwl_link_quality_cmd link_cmd = {
 973                 .reserved1 = 0,
 974         };
 975         u32 rate_flags;
 976
 977         /* Set up the rate scaling to start at selected rate, fall back
 978          * all the way down to 1M in IEEE order, and then spin on 1M */
 979         if (is_ap)
 980                 r = IWL_RATE_54M_INDEX;
 981         else if (priv->band == IEEE80211_BAND_5GHZ)
 982                 r = IWL_RATE_6M_INDEX;
 983         else
 984                 r = IWL_RATE_1M_INDEX;
 985
 986         for (i = 0; i < LINK_QUAL_MAX_RETRY_NUM; i++) {
 987                 rate_flags = 0;
 988                 if (r >= IWL_FIRST_CCK_RATE && r <= IWL_LAST_CCK_RATE)
 989                         rate_flags |= RATE_MCS_CCK_MSK;
 990
 991                 rate_flags |= first_antenna(priv->hw_params.valid_tx_ant) <<
 992                                 RATE_MCS_ANT_POS;
 993
 994                 link_cmd.rs_table[i].rate_n_flags =
 995                         iwl_hw_set_rate_n_flags(iwl_rates[r].plcp, rate_flags);
 996                 r = iwl_get_prev_ieee_rate(r);
 997         }
 998
 999         link_cmd.general_params.single_stream_ant_msk =
1000                                 first_antenna(priv->hw_params.valid_tx_ant);
1001         link_cmd.general_params.dual_stream_ant_msk = 3;
1002         link_cmd.agg_params.agg_dis_start_th = LINK_QUAL_AGG_DISABLE_START_DEF;
1003         link_cmd.agg_params.agg_time_limit =
1004                 cpu_to_le16(LINK_QUAL_AGG_TIME_LIMIT_DEF);
1005
1006         /* Update the rate scaling for control frame Tx to AP */
1007         link_cmd.sta_id = is_ap ? IWL_AP_ID : priv->hw_params.bcast_sta_id;
1008
1009         iwl_send_cmd_pdu_async(priv, REPLY_TX_LINK_QUALITY_CMD,
1010                                sizeof(link_cmd), &link_cmd, NULL);
1011 }
1012
1013 /**
1014  * iwl_rxon_add_station - add station into station table.
1015  *
1016  * there is only one AP station with id= IWL_AP_ID
1017  * NOTE: mutex must be held before calling this function
1018  */
1019 int iwl_rxon_add_station(struct iwl_priv *priv, const u8 *addr, bool is_ap)
1020 {
1021         struct ieee80211_sta *sta;
1022         struct ieee80211_sta_ht_cap ht_config;
1023         struct ieee80211_sta_ht_cap *cur_ht_config = NULL;
1024         u8 sta_id;
1025
1026         /* Add station to device's station table */
1027
1028         /*
1029          * XXX: This check is definitely not correct, if we're an AP
1030          *      it'll always be false which is not what we want, but
1031          *      it doesn't look like iwlagn is prepared to be an HT
1032          *      AP anyway.
1033          */
1034         if (priv->current_ht_config.is_ht) {
1035                 rcu_read_lock();
1036                 sta = ieee80211_find_sta(priv->hw, addr);
1037                 if (sta) {
1038                         memcpy(&ht_config, &sta->ht_cap, sizeof(ht_config));
1039                         cur_ht_config = &ht_config;
1040                 }
1041                 rcu_read_unlock();
1042         }
1043
1044         sta_id = iwl_add_station(priv, addr, is_ap, CMD_SYNC, cur_ht_config);
1045
1046         /* Set up default rate scaling table in device's station table */
1047         iwl_sta_init_lq(priv, addr, is_ap);
1048
1049         return sta_id;
1050 }
1051 EXPORT_SYMBOL(iwl_rxon_add_station);
1052
1053 /**
1054  * iwl_get_sta_id - Find station's index within station table
1055  *
1056  * If new IBSS station, create new entry in station table
1057  */
1058 int iwl_get_sta_id(struct iwl_priv *priv, struct ieee80211_hdr *hdr)
1059 {
1060         int sta_id;
1061         __le16 fc = hdr->frame_control;
1062
1063         /* If this frame is broadcast or management, use broadcast station id */
1064         if (!ieee80211_is_data(fc) ||  is_multicast_ether_addr(hdr->addr1))
1065                 return priv->hw_params.bcast_sta_id;
1066
1067         switch (priv->iw_mode) {
1068
1069         /* If we are a client station in a BSS network, use the special
1070          * AP station entry (that's the only station we communicate with) */
1071         case NL80211_IFTYPE_STATION:
1072                 return IWL_AP_ID;
1073
1074         /* If we are an AP, then find the station, or use BCAST */
1075         case NL80211_IFTYPE_AP:
1076                 sta_id = iwl_find_station(priv, hdr->addr1);
1077                 if (sta_id != IWL_INVALID_STATION)
1078                         return sta_id;
1079                 return priv->hw_params.bcast_sta_id;
1080
1081         /* If this frame is going out to an IBSS network, find the station,
1082          * or create a new station table entry */
1083         case NL80211_IFTYPE_ADHOC:
1084                 sta_id = iwl_find_station(priv, hdr->addr1);
1085                 if (sta_id != IWL_INVALID_STATION)
1086                         return sta_id;
1087
1088                 /* Create new station table entry */
1089                 sta_id = iwl_add_station(priv, hdr->addr1, false,
1090                                         CMD_ASYNC, NULL);
1091
1092                 if (sta_id != IWL_INVALID_STATION)
1093                         return sta_id;
1094
1095                 IWL_DEBUG_DROP(priv, "Station %pM not in station map. "
1096                                "Defaulting to broadcast...\n",
1097                                hdr->addr1);
1098                 iwl_print_hex_dump(IWL_DL_DROP, (u8 *) hdr, sizeof(*hdr));
1099                 return priv->hw_params.bcast_sta_id;
1100
1101         default:
1102                 IWL_WARN(priv, "Unknown mode of operation: %d\n",
1103                         priv->iw_mode);
1104                 return priv->hw_params.bcast_sta_id;
1105         }
1106 }
1107 EXPORT_SYMBOL(iwl_get_sta_id);
1108
1109 /**
1110  * iwl_sta_tx_modify_enable_tid - Enable Tx for this TID in station table
1111  */
1112 void iwl_sta_tx_modify_enable_tid(struct iwl_priv *priv, int sta_id, int tid)
1113 {
1114         unsigned long flags;
1115
1116         /* Remove "disable" flag, to enable Tx for this TID */
1117         spin_lock_irqsave(&priv->sta_lock, flags);
1118         priv->stations[sta_id].sta.sta.modify_mask = STA_MODIFY_TID_DISABLE_TX;
1119         priv->stations[sta_id].sta.tid_disable_tx &= cpu_to_le16(~(1 << tid));
1120         priv->stations[sta_id].sta.mode = STA_CONTROL_MODIFY_MSK;
1121         spin_unlock_irqrestore(&priv->sta_lock, flags);
1122
1123         iwl_send_add_sta(priv, &priv->stations[sta_id].sta, CMD_ASYNC);
1124 }
1125 EXPORT_SYMBOL(iwl_sta_tx_modify_enable_tid);
1126
1127 int iwl_sta_rx_agg_start(struct iwl_priv *priv,
1128                          const u8 *addr, int tid, u16 ssn)
1129 {
1130         unsigned long flags;
1131         int sta_id;
1132
1133         sta_id = iwl_find_station(priv, addr);
1134         if (sta_id == IWL_INVALID_STATION)
1135                 return -ENXIO;
1136
1137         spin_lock_irqsave(&priv->sta_lock, flags);
1138         priv->stations[sta_id].sta.station_flags_msk = 0;
1139         priv->stations[sta_id].sta.sta.modify_mask = STA_MODIFY_ADDBA_TID_MSK;
1140         priv->stations[sta_id].sta.add_immediate_ba_tid = (u8)tid;
1141         priv->stations[sta_id].sta.add_immediate_ba_ssn = cpu_to_le16(ssn);
1142         priv->stations[sta_id].sta.mode = STA_CONTROL_MODIFY_MSK;
1143         spin_unlock_irqrestore(&priv->sta_lock, flags);
1144
1145         return iwl_send_add_sta(priv, &priv->stations[sta_id].sta,
1146                                         CMD_ASYNC);
1147 }
1148 EXPORT_SYMBOL(iwl_sta_rx_agg_start);
1149
1150 int iwl_sta_rx_agg_stop(struct iwl_priv *priv, const u8 *addr, int tid)
1151 {
1152         unsigned long flags;
1153         int sta_id;
1154
1155         sta_id = iwl_find_station(priv, addr);
1156         if (sta_id == IWL_INVALID_STATION) {
1157                 IWL_ERR(priv, "Invalid station for AGG tid %d\n", tid);
1158                 return -ENXIO;
1159         }
1160
1161         spin_lock_irqsave(&priv->sta_lock, flags);
1162         priv->stations[sta_id].sta.station_flags_msk = 0;
1163         priv->stations[sta_id].sta.sta.modify_mask = STA_MODIFY_DELBA_TID_MSK;
1164         priv->stations[sta_id].sta.remove_immediate_ba_tid = (u8)tid;
1165         priv->stations[sta_id].sta.mode = STA_CONTROL_MODIFY_MSK;
1166         spin_unlock_irqrestore(&priv->sta_lock, flags);
1167
1168         return iwl_send_add_sta(priv, &priv->stations[sta_id].sta,
1169                                         CMD_ASYNC);
1170 }
1171 EXPORT_SYMBOL(iwl_sta_rx_agg_stop);
1172
1173 static void iwl_sta_modify_ps_wake(struct iwl_priv *priv, int sta_id)
1174 {
1175         unsigned long flags;
1176
1177         spin_lock_irqsave(&priv->sta_lock, flags);
1178         priv->stations[sta_id].sta.station_flags &= ~STA_FLG_PWR_SAVE_MSK;
1179         priv->stations[sta_id].sta.station_flags_msk = STA_FLG_PWR_SAVE_MSK;
1180         priv->stations[sta_id].sta.sta.modify_mask = 0;
1181         priv->stations[sta_id].sta.mode = STA_CONTROL_MODIFY_MSK;
1182         spin_unlock_irqrestore(&priv->sta_lock, flags);
1183
1184         iwl_send_add_sta(priv, &priv->stations[sta_id].sta, CMD_ASYNC);
1185 }
1186
1187 void iwl_update_ps_mode(struct iwl_priv *priv, u16 ps_bit, u8 *addr)
1188 {
1189         /* FIXME: need locking over ps_status ??? */
1190         u8 sta_id = iwl_find_station(priv, addr);
1191
1192         if (sta_id != IWL_INVALID_STATION) {
1193                 u8 sta_awake = priv->stations[sta_id].
1194                                 ps_status == STA_PS_STATUS_WAKE;
1195
1196                 if (sta_awake && ps_bit)
1197                         priv->stations[sta_id].ps_status = STA_PS_STATUS_SLEEP;
1198                 else if (!sta_awake && !ps_bit) {
1199                         iwl_sta_modify_ps_wake(priv, sta_id);
1200                         priv->stations[sta_id].ps_status = STA_PS_STATUS_WAKE;
1201                 }
1202         }
1203 }
1204