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 void 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;
 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;
 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
 132 int iwl_send_add_sta(struct iwl_priv *priv,
 133                      struct iwl_addsta_cmd *sta, u8 flags)
 134 {
 135         struct iwl_rx_packet *res = NULL;
 136         int ret = 0;
 137         u8 data[sizeof(*sta)];
 138         struct iwl_host_cmd cmd = {
 139                 .id = REPLY_ADD_STA,
 140                 .flags = flags,
 141                 .data = data,
 142         };
 143
 144         if (flags & CMD_ASYNC)
 145                 cmd.callback = iwl_add_sta_callback;
 146         else
 147                 cmd.flags |= CMD_WANT_SKB;
 148
 149         cmd.len = priv->cfg->ops->utils->build_addsta_hcmd(sta, data);
 150         ret = iwl_send_cmd(priv, &cmd);
 151
 152         if (ret || (flags & CMD_ASYNC))
 153                 return ret;
 154
 155         res = (struct iwl_rx_packet *)cmd.reply_skb->data;
 156         if (res->hdr.flags & IWL_CMD_FAILED_MSK) {
 157                 IWL_ERR(priv, "Bad return from REPLY_ADD_STA (0x%08X)\n",
 158                           res->hdr.flags);
 159                 ret = -EIO;
 160         }
 161
 162         if (ret == 0) {
 163                 switch (res->u.add_sta.status) {
 164                 case ADD_STA_SUCCESS_MSK:
 165                         iwl_sta_ucode_activate(priv, sta->sta.sta_id);
 166                         IWL_DEBUG_INFO(priv, "REPLY_ADD_STA PASSED\n");
 167                         break;
 168                 default:
 169                         ret = -EIO;
 170                         IWL_WARN(priv, "REPLY_ADD_STA failed\n");
 171                         break;
 172                 }
 173         }
 174
 175         priv->alloc_rxb_skb--;
 176         dev_kfree_skb_any(cmd.reply_skb);
 177
 178         return ret;
 179 }
 180 EXPORT_SYMBOL(iwl_send_add_sta);
 181
 182 static void iwl_set_ht_add_station(struct iwl_priv *priv, u8 index,
 183                                    struct ieee80211_sta_ht_cap *sta_ht_inf)
 184 {
 185         __le32 sta_flags;
 186         u8 mimo_ps_mode;
 187
 188         if (!sta_ht_inf || !sta_ht_inf->ht_supported)
 189                 goto done;
 190
 191         mimo_ps_mode = (sta_ht_inf->cap & IEEE80211_HT_CAP_SM_PS) >> 2;
 192
 193         sta_flags = priv->stations[index].sta.station_flags;
 194
 195         sta_flags &= ~(STA_FLG_RTS_MIMO_PROT_MSK | STA_FLG_MIMO_DIS_MSK);
 196
 197         switch (mimo_ps_mode) {
 198         case WLAN_HT_CAP_SM_PS_STATIC:
 199                 sta_flags |= STA_FLG_MIMO_DIS_MSK;
 200                 break;
 201         case WLAN_HT_CAP_SM_PS_DYNAMIC:
 202                 sta_flags |= STA_FLG_RTS_MIMO_PROT_MSK;
 203                 break;
 204         case WLAN_HT_CAP_SM_PS_DISABLED:
 205                 break;
 206         default:
 207                 IWL_WARN(priv, "Invalid MIMO PS mode %d\n", mimo_ps_mode);
 208                 break;
 209         }
 210
 211         sta_flags |= cpu_to_le32(
 212               (u32)sta_ht_inf->ampdu_factor << STA_FLG_MAX_AGG_SIZE_POS);
 213
 214         sta_flags |= cpu_to_le32(
 215               (u32)sta_ht_inf->ampdu_density << STA_FLG_AGG_MPDU_DENSITY_POS);
 216
 217         if (iwl_is_ht40_tx_allowed(priv, sta_ht_inf))
 218                 sta_flags |= STA_FLG_HT40_EN_MSK;
 219         else
 220                 sta_flags &= ~STA_FLG_HT40_EN_MSK;
 221
 222         priv->stations[index].sta.station_flags = sta_flags;
 223  done:
 224         return;
 225 }
 226
 227 /**
 228  * iwl_add_station - Add station to tables in driver and device
 229  */
 230 u8 iwl_add_station(struct iwl_priv *priv, const u8 *addr, bool is_ap, u8 flags,
 231                 struct ieee80211_sta_ht_cap *ht_info)
 232 {
 233         struct iwl_station_entry *station;
 234         unsigned long flags_spin;
 235         int i;
 236         int sta_id = IWL_INVALID_STATION;
 237         u16 rate;
 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(priv, "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         /* 3945 only */
 290         rate = (priv->band == IEEE80211_BAND_5GHZ) ?
 291                 IWL_RATE_6M_PLCP : IWL_RATE_1M_PLCP;
 292         /* Turn on both antennas for the station... */
 293         station->sta.rate_n_flags = cpu_to_le16(rate | RATE_MCS_ANT_AB_MSK);
 294
 295         spin_unlock_irqrestore(&priv->sta_lock, flags_spin);
 296
 297         /* Add station to device's station table */
 298         iwl_send_add_sta(priv, &station->sta, flags);
 299         return sta_id;
 300
 301 }
 302 EXPORT_SYMBOL(iwl_add_station);
 303
 304 static void iwl_sta_ucode_deactivate(struct iwl_priv *priv, const char *addr)
 305 {
 306         unsigned long flags;
 307         u8 sta_id = iwl_find_station(priv, addr);
 308
 309         BUG_ON(sta_id == IWL_INVALID_STATION);
 310
 311         IWL_DEBUG_ASSOC(priv, "Removed STA from Ucode: %pM\n", addr);
 312
 313         spin_lock_irqsave(&priv->sta_lock, flags);
 314
 315         /* Ucode must be active and driver must be non active */
 316         if (priv->stations[sta_id].used != IWL_STA_UCODE_ACTIVE)
 317                 IWL_ERR(priv, "removed non active STA %d\n", sta_id);
 318
 319         priv->stations[sta_id].used &= ~IWL_STA_UCODE_ACTIVE;
 320
 321         memset(&priv->stations[sta_id], 0, sizeof(struct iwl_station_entry));
 322         spin_unlock_irqrestore(&priv->sta_lock, flags);
 323 }
 324
 325 static void iwl_remove_sta_callback(struct iwl_priv *priv,
 326                                     struct iwl_device_cmd *cmd,
 327                                     struct sk_buff *skb)
 328 {
 329         struct iwl_rx_packet *res = NULL;
 330         struct iwl_rem_sta_cmd *rm_sta =
 331                  (struct iwl_rem_sta_cmd *)cmd->cmd.payload;
 332         const char *addr = rm_sta->addr;
 333
 334         if (!skb) {
 335                 IWL_ERR(priv, "Error: Response NULL in REPLY_REMOVE_STA.\n");
 336                 return;
 337         }
 338
 339         res = (struct iwl_rx_packet *)skb->data;
 340         if (res->hdr.flags & IWL_CMD_FAILED_MSK) {
 341                 IWL_ERR(priv, "Bad return from REPLY_REMOVE_STA (0x%08X)\n",
 342                 res->hdr.flags);
 343                 return;
 344         }
 345
 346         switch (res->u.rem_sta.status) {
 347         case REM_STA_SUCCESS_MSK:
 348                 iwl_sta_ucode_deactivate(priv, addr);
 349                 break;
 350         default:
 351                 IWL_ERR(priv, "REPLY_REMOVE_STA failed\n");
 352                 break;
 353         }
 354 }
 355
 356 static int iwl_send_remove_station(struct iwl_priv *priv, const u8 *addr,
 357                                    u8 flags)
 358 {
 359         struct iwl_rx_packet *res = NULL;
 360         int ret;
 361
 362         struct iwl_rem_sta_cmd rm_sta_cmd;
 363
 364         struct iwl_host_cmd cmd = {
 365                 .id = REPLY_REMOVE_STA,
 366                 .len = sizeof(struct iwl_rem_sta_cmd),
 367                 .flags = flags,
 368                 .data = &rm_sta_cmd,
 369         };
 370
 371         memset(&rm_sta_cmd, 0, sizeof(rm_sta_cmd));
 372         rm_sta_cmd.num_sta = 1;
 373         memcpy(&rm_sta_cmd.addr, addr , ETH_ALEN);
 374
 375         if (flags & CMD_ASYNC)
 376                 cmd.callback = iwl_remove_sta_callback;
 377         else
 378                 cmd.flags |= CMD_WANT_SKB;
 379         ret = iwl_send_cmd(priv, &cmd);
 380
 381         if (ret || (flags & CMD_ASYNC))
 382                 return ret;
 383
 384         res = (struct iwl_rx_packet *)cmd.reply_skb->data;
 385         if (res->hdr.flags & IWL_CMD_FAILED_MSK) {
 386                 IWL_ERR(priv, "Bad return from REPLY_REMOVE_STA (0x%08X)\n",
 387                           res->hdr.flags);
 388                 ret = -EIO;
 389         }
 390
 391         if (!ret) {
 392                 switch (res->u.rem_sta.status) {
 393                 case REM_STA_SUCCESS_MSK:
 394                         iwl_sta_ucode_deactivate(priv, addr);
 395                         IWL_DEBUG_ASSOC(priv, "REPLY_REMOVE_STA PASSED\n");
 396                         break;
 397                 default:
 398                         ret = -EIO;
 399                         IWL_ERR(priv, "REPLY_REMOVE_STA failed\n");
 400                         break;
 401                 }
 402         }
 403
 404         priv->alloc_rxb_skb--;
 405         dev_kfree_skb_any(cmd.reply_skb);
 406
 407         return ret;
 408 }
 409
 410 /**
 411  * iwl_remove_station - Remove driver's knowledge of station.
 412  */
 413 int iwl_remove_station(struct iwl_priv *priv, const u8 *addr, bool is_ap)
 414 {
 415         int sta_id = IWL_INVALID_STATION;
 416         int i, ret = -EINVAL;
 417         unsigned long flags;
 418
 419         spin_lock_irqsave(&priv->sta_lock, flags);
 420
 421         if (is_ap)
 422                 sta_id = IWL_AP_ID;
 423         else if (is_broadcast_ether_addr(addr))
 424                 sta_id = priv->hw_params.bcast_sta_id;
 425         else
 426                 for (i = IWL_STA_ID; i < priv->hw_params.max_stations; i++)
 427                         if (priv->stations[i].used &&
 428                             !compare_ether_addr(priv->stations[i].sta.sta.addr,
 429                                                 addr)) {
 430                                 sta_id = i;
 431                                 break;
 432                         }
 433
 434         if (unlikely(sta_id == IWL_INVALID_STATION))
 435                 goto out;
 436
 437         IWL_DEBUG_ASSOC(priv, "Removing STA from driver:%d  %pM\n",
 438                 sta_id, addr);
 439
 440         if (!(priv->stations[sta_id].used & IWL_STA_DRIVER_ACTIVE)) {
 441                 IWL_ERR(priv, "Removing %pM but non DRIVER active\n",
 442                                 addr);
 443                 goto out;
 444         }
 445
 446         if (!(priv->stations[sta_id].used & IWL_STA_UCODE_ACTIVE)) {
 447                 IWL_ERR(priv, "Removing %pM but non UCODE active\n",
 448                                 addr);
 449                 goto out;
 450         }
 451
 452
 453         priv->stations[sta_id].used &= ~IWL_STA_DRIVER_ACTIVE;
 454
 455         priv->num_stations--;
 456
 457         BUG_ON(priv->num_stations < 0);
 458
 459         spin_unlock_irqrestore(&priv->sta_lock, flags);
 460
 461         ret = iwl_send_remove_station(priv, addr, CMD_ASYNC);
 462         return ret;
 463 out:
 464         spin_unlock_irqrestore(&priv->sta_lock, flags);
 465         return ret;
 466 }
 467
 468 /**
 469  * iwl_clear_stations_table - Clear the driver's station table
 470  *
 471  * NOTE:  This does not clear or otherwise alter the device's station table.
 472  */
 473 void iwl_clear_stations_table(struct iwl_priv *priv)
 474 {
 475         unsigned long flags;
 476         int i;
 477
 478         spin_lock_irqsave(&priv->sta_lock, flags);
 479
 480         if (iwl_is_alive(priv) &&
 481            !test_bit(STATUS_EXIT_PENDING, &priv->status) &&
 482            iwl_send_cmd_pdu_async(priv, REPLY_REMOVE_ALL_STA, 0, NULL, NULL))
 483                 IWL_ERR(priv, "Couldn't clear the station table\n");
 484
 485         priv->num_stations = 0;
 486         memset(priv->stations, 0, sizeof(priv->stations));
 487
 488         /* clean ucode key table bit map */
 489         priv->ucode_key_table = 0;
 490
 491         /* keep track of static keys */
 492         for (i = 0; i < WEP_KEYS_MAX ; i++) {
 493                 if (priv->wep_keys[i].key_size)
 494                         set_bit(i, &priv->ucode_key_table);
 495         }
 496
 497         spin_unlock_irqrestore(&priv->sta_lock, flags);
 498 }
 499 EXPORT_SYMBOL(iwl_clear_stations_table);
 500
 501 int iwl_get_free_ucode_key_index(struct iwl_priv *priv)
 502 {
 503         int i;
 504
 505         for (i = 0; i < STA_KEY_MAX_NUM; i++)
 506                 if (!test_and_set_bit(i, &priv->ucode_key_table))
 507                         return i;
 508
 509         return WEP_INVALID_OFFSET;
 510 }
 511 EXPORT_SYMBOL(iwl_get_free_ucode_key_index);
 512
 513 int iwl_send_static_wepkey_cmd(struct iwl_priv *priv, u8 send_if_empty)
 514 {
 515         int i, not_empty = 0;
 516         u8 buff[sizeof(struct iwl_wep_cmd) +
 517                 sizeof(struct iwl_wep_key) * WEP_KEYS_MAX];
 518         struct iwl_wep_cmd *wep_cmd = (struct iwl_wep_cmd *)buff;
 519         size_t cmd_size  = sizeof(struct iwl_wep_cmd);
 520         struct iwl_host_cmd cmd = {
 521                 .id = REPLY_WEPKEY,
 522                 .data = wep_cmd,
 523                 .flags = CMD_ASYNC,
 524         };
 525
 526         memset(wep_cmd, 0, cmd_size +
 527                         (sizeof(struct iwl_wep_key) * WEP_KEYS_MAX));
 528
 529         for (i = 0; i < WEP_KEYS_MAX ; i++) {
 530                 wep_cmd->key[i].key_index = i;
 531                 if (priv->wep_keys[i].key_size) {
 532                         wep_cmd->key[i].key_offset = i;
 533                         not_empty = 1;
 534                 } else {
 535                         wep_cmd->key[i].key_offset = WEP_INVALID_OFFSET;
 536                 }
 537
 538                 wep_cmd->key[i].key_size = priv->wep_keys[i].key_size;
 539                 memcpy(&wep_cmd->key[i].key[3], priv->wep_keys[i].key,
 540                                 priv->wep_keys[i].key_size);
 541         }
 542
 543         wep_cmd->global_key_type = WEP_KEY_WEP_TYPE;
 544         wep_cmd->num_keys = WEP_KEYS_MAX;
 545
 546         cmd_size += sizeof(struct iwl_wep_key) * WEP_KEYS_MAX;
 547
 548         cmd.len = cmd_size;
 549
 550         if (not_empty || send_if_empty)
 551                 return iwl_send_cmd(priv, &cmd);
 552         else
 553                 return 0;
 554 }
 555 EXPORT_SYMBOL(iwl_send_static_wepkey_cmd);
 556
 557 int iwl_remove_default_wep_key(struct iwl_priv *priv,
 558                                struct ieee80211_key_conf *keyconf)
 559 {
 560         int ret;
 561         unsigned long flags;
 562
 563         spin_lock_irqsave(&priv->sta_lock, flags);
 564         IWL_DEBUG_WEP(priv, "Removing default WEP key: idx=%d\n",
 565                       keyconf->keyidx);
 566
 567         if (!test_and_clear_bit(keyconf->keyidx, &priv->ucode_key_table))
 568                 IWL_ERR(priv, "index %d not used in uCode key table.\n",
 569                           keyconf->keyidx);
 570
 571         priv->default_wep_key--;
 572         memset(&priv->wep_keys[keyconf->keyidx], 0, sizeof(priv->wep_keys[0]));
 573         if (iwl_is_rfkill(priv)) {
 574                 IWL_DEBUG_WEP(priv, "Not sending REPLY_WEPKEY command due to RFKILL.\n");
 575                 spin_unlock_irqrestore(&priv->sta_lock, flags);
 576                 return 0;
 577         }
 578         ret = iwl_send_static_wepkey_cmd(priv, 1);
 579         IWL_DEBUG_WEP(priv, "Remove default WEP key: idx=%d ret=%d\n",
 580                       keyconf->keyidx, ret);
 581         spin_unlock_irqrestore(&priv->sta_lock, flags);
 582
 583         return ret;
 584 }
 585 EXPORT_SYMBOL(iwl_remove_default_wep_key);
 586
 587 int iwl_set_default_wep_key(struct iwl_priv *priv,
 588                             struct ieee80211_key_conf *keyconf)
 589 {
 590         int ret;
 591         unsigned long flags;
 592
 593         if (keyconf->keylen != WEP_KEY_LEN_128 &&
 594             keyconf->keylen != WEP_KEY_LEN_64) {
 595                 IWL_DEBUG_WEP(priv, "Bad WEP key length %d\n", keyconf->keylen);
 596                 return -EINVAL;
 597         }
 598
 599         keyconf->flags &= ~IEEE80211_KEY_FLAG_GENERATE_IV;
 600         keyconf->hw_key_idx = HW_KEY_DEFAULT;
 601         priv->stations[IWL_AP_ID].keyinfo.alg = ALG_WEP;
 602
 603         spin_lock_irqsave(&priv->sta_lock, flags);
 604         priv->default_wep_key++;
 605
 606         if (test_and_set_bit(keyconf->keyidx, &priv->ucode_key_table))
 607                 IWL_ERR(priv, "index %d already used in uCode key table.\n",
 608                         keyconf->keyidx);
 609
 610         priv->wep_keys[keyconf->keyidx].key_size = keyconf->keylen;
 611         memcpy(&priv->wep_keys[keyconf->keyidx].key, &keyconf->key,
 612                                                         keyconf->keylen);
 613
 614         ret = iwl_send_static_wepkey_cmd(priv, 0);
 615         IWL_DEBUG_WEP(priv, "Set default WEP key: len=%d idx=%d ret=%d\n",
 616                 keyconf->keylen, keyconf->keyidx, ret);
 617         spin_unlock_irqrestore(&priv->sta_lock, flags);
 618
 619         return ret;
 620 }
 621 EXPORT_SYMBOL(iwl_set_default_wep_key);
 622
 623 static int iwl_set_wep_dynamic_key_info(struct iwl_priv *priv,
 624                                 struct ieee80211_key_conf *keyconf,
 625                                 u8 sta_id)
 626 {
 627         unsigned long flags;
 628         __le16 key_flags = 0;
 629         int ret;
 630
 631         keyconf->flags &= ~IEEE80211_KEY_FLAG_GENERATE_IV;
 632
 633         key_flags |= (STA_KEY_FLG_WEP | STA_KEY_FLG_MAP_KEY_MSK);
 634         key_flags |= cpu_to_le16(keyconf->keyidx << STA_KEY_FLG_KEYID_POS);
 635         key_flags &= ~STA_KEY_FLG_INVALID;
 636
 637         if (keyconf->keylen == WEP_KEY_LEN_128)
 638                 key_flags |= STA_KEY_FLG_KEY_SIZE_MSK;
 639
 640         if (sta_id == priv->hw_params.bcast_sta_id)
 641                 key_flags |= STA_KEY_MULTICAST_MSK;
 642
 643         spin_lock_irqsave(&priv->sta_lock, flags);
 644
 645         priv->stations[sta_id].keyinfo.alg = keyconf->alg;
 646         priv->stations[sta_id].keyinfo.keylen = keyconf->keylen;
 647         priv->stations[sta_id].keyinfo.keyidx = keyconf->keyidx;
 648
 649         memcpy(priv->stations[sta_id].keyinfo.key,
 650                                 keyconf->key, keyconf->keylen);
 651
 652         memcpy(&priv->stations[sta_id].sta.key.key[3],
 653                                 keyconf->key, keyconf->keylen);
 654
 655         if ((priv->stations[sta_id].sta.key.key_flags & STA_KEY_FLG_ENCRYPT_MSK)
 656                         == STA_KEY_FLG_NO_ENC)
 657                 priv->stations[sta_id].sta.key.key_offset =
 658                                  iwl_get_free_ucode_key_index(priv);
 659         /* else, we are overriding an existing key => no need to allocated room
 660          * in uCode. */
 661
 662         WARN(priv->stations[sta_id].sta.key.key_offset == WEP_INVALID_OFFSET,
 663                 "no space for a new key");
 664
 665         priv->stations[sta_id].sta.key.key_flags = key_flags;
 666         priv->stations[sta_id].sta.sta.modify_mask = STA_MODIFY_KEY_MASK;
 667         priv->stations[sta_id].sta.mode = STA_CONTROL_MODIFY_MSK;
 668
 669         ret = iwl_send_add_sta(priv, &priv->stations[sta_id].sta, CMD_ASYNC);
 670
 671         spin_unlock_irqrestore(&priv->sta_lock, flags);
 672
 673         return ret;
 674 }
 675
 676 static int iwl_set_ccmp_dynamic_key_info(struct iwl_priv *priv,
 677                                    struct ieee80211_key_conf *keyconf,
 678                                    u8 sta_id)
 679 {
 680         unsigned long flags;
 681         __le16 key_flags = 0;
 682         int ret;
 683
 684         key_flags |= (STA_KEY_FLG_CCMP | STA_KEY_FLG_MAP_KEY_MSK);
 685         key_flags |= cpu_to_le16(keyconf->keyidx << STA_KEY_FLG_KEYID_POS);
 686         key_flags &= ~STA_KEY_FLG_INVALID;
 687
 688         if (sta_id == priv->hw_params.bcast_sta_id)
 689                 key_flags |= STA_KEY_MULTICAST_MSK;
 690
 691         keyconf->flags |= IEEE80211_KEY_FLAG_GENERATE_IV;
 692
 693         spin_lock_irqsave(&priv->sta_lock, flags);
 694         priv->stations[sta_id].keyinfo.alg = keyconf->alg;
 695         priv->stations[sta_id].keyinfo.keylen = keyconf->keylen;
 696
 697         memcpy(priv->stations[sta_id].keyinfo.key, keyconf->key,
 698                keyconf->keylen);
 699
 700         memcpy(priv->stations[sta_id].sta.key.key, keyconf->key,
 701                keyconf->keylen);
 702
 703         if ((priv->stations[sta_id].sta.key.key_flags & STA_KEY_FLG_ENCRYPT_MSK)
 704                         == STA_KEY_FLG_NO_ENC)
 705                 priv->stations[sta_id].sta.key.key_offset =
 706                                  iwl_get_free_ucode_key_index(priv);
 707         /* else, we are overriding an existing key => no need to allocated room
 708          * in uCode. */
 709
 710         WARN(priv->stations[sta_id].sta.key.key_offset == WEP_INVALID_OFFSET,
 711                 "no space for a new key");
 712
 713         priv->stations[sta_id].sta.key.key_flags = key_flags;
 714         priv->stations[sta_id].sta.sta.modify_mask = STA_MODIFY_KEY_MASK;
 715         priv->stations[sta_id].sta.mode = STA_CONTROL_MODIFY_MSK;
 716
 717         ret = iwl_send_add_sta(priv, &priv->stations[sta_id].sta, CMD_ASYNC);
 718
 719         spin_unlock_irqrestore(&priv->sta_lock, flags);
 720
 721         return ret;
 722 }
 723
 724 static int iwl_set_tkip_dynamic_key_info(struct iwl_priv *priv,
 725                                    struct ieee80211_key_conf *keyconf,
 726                                    u8 sta_id)
 727 {
 728         unsigned long flags;
 729         int ret = 0;
 730         __le16 key_flags = 0;
 731
 732         key_flags |= (STA_KEY_FLG_TKIP | STA_KEY_FLG_MAP_KEY_MSK);
 733         key_flags |= cpu_to_le16(keyconf->keyidx << STA_KEY_FLG_KEYID_POS);
 734         key_flags &= ~STA_KEY_FLG_INVALID;
 735
 736         if (sta_id == priv->hw_params.bcast_sta_id)
 737                 key_flags |= STA_KEY_MULTICAST_MSK;
 738
 739         keyconf->flags |= IEEE80211_KEY_FLAG_GENERATE_IV;
 740         keyconf->flags |= IEEE80211_KEY_FLAG_GENERATE_MMIC;
 741
 742         spin_lock_irqsave(&priv->sta_lock, flags);
 743
 744         priv->stations[sta_id].keyinfo.alg = keyconf->alg;
 745         priv->stations[sta_id].keyinfo.keylen = 16;
 746
 747         if ((priv->stations[sta_id].sta.key.key_flags & STA_KEY_FLG_ENCRYPT_MSK)
 748                         == STA_KEY_FLG_NO_ENC)
 749                 priv->stations[sta_id].sta.key.key_offset =
 750                                  iwl_get_free_ucode_key_index(priv);
 751         /* else, we are overriding an existing key => no need to allocated room
 752          * in uCode. */
 753
 754         WARN(priv->stations[sta_id].sta.key.key_offset == WEP_INVALID_OFFSET,
 755                 "no space for a new key");
 756
 757         priv->stations[sta_id].sta.key.key_flags = key_flags;
 758
 759
 760         /* This copy is acutally not needed: we get the key with each TX */
 761         memcpy(priv->stations[sta_id].keyinfo.key, keyconf->key, 16);
 762
 763         memcpy(priv->stations[sta_id].sta.key.key, keyconf->key, 16);
 764
 765         spin_unlock_irqrestore(&priv->sta_lock, flags);
 766
 767         return ret;
 768 }
 769
 770 void iwl_update_tkip_key(struct iwl_priv *priv,
 771                         struct ieee80211_key_conf *keyconf,
 772                         const u8 *addr, u32 iv32, u16 *phase1key)
 773 {
 774         u8 sta_id = IWL_INVALID_STATION;
 775         unsigned long flags;
 776         int i;
 777
 778         sta_id = iwl_find_station(priv, addr);
 779         if (sta_id == IWL_INVALID_STATION) {
 780                 IWL_DEBUG_MAC80211(priv, "leave - %pM not in station map.\n",
 781                                    addr);
 782                 return;
 783         }
 784
 785         if (iwl_scan_cancel(priv)) {
 786                 /* cancel scan failed, just live w/ bad key and rely
 787                    briefly on SW decryption */
 788                 return;
 789         }
 790
 791         spin_lock_irqsave(&priv->sta_lock, flags);
 792
 793         priv->stations[sta_id].sta.key.tkip_rx_tsc_byte2 = (u8) iv32;
 794
 795         for (i = 0; i < 5; i++)
 796                 priv->stations[sta_id].sta.key.tkip_rx_ttak[i] =
 797                         cpu_to_le16(phase1key[i]);
 798
 799         priv->stations[sta_id].sta.sta.modify_mask = STA_MODIFY_KEY_MASK;
 800         priv->stations[sta_id].sta.mode = STA_CONTROL_MODIFY_MSK;
 801
 802         iwl_send_add_sta(priv, &priv->stations[sta_id].sta, CMD_ASYNC);
 803
 804         spin_unlock_irqrestore(&priv->sta_lock, flags);
 805
 806 }
 807 EXPORT_SYMBOL(iwl_update_tkip_key);
 808
 809 int iwl_remove_dynamic_key(struct iwl_priv *priv,
 810                                 struct ieee80211_key_conf *keyconf,
 811                                 u8 sta_id)
 812 {
 813         unsigned long flags;
 814         int ret = 0;
 815         u16 key_flags;
 816         u8 keyidx;
 817
 818         priv->key_mapping_key--;
 819
 820         spin_lock_irqsave(&priv->sta_lock, flags);
 821         key_flags = le16_to_cpu(priv->stations[sta_id].sta.key.key_flags);
 822         keyidx = (key_flags >> STA_KEY_FLG_KEYID_POS) & 0x3;
 823
 824         IWL_DEBUG_WEP(priv, "Remove dynamic key: idx=%d sta=%d\n",
 825                       keyconf->keyidx, sta_id);
 826
 827         if (keyconf->keyidx != keyidx) {
 828                 /* We need to remove a key with index different that the one
 829                  * in the uCode. This means that the key we need to remove has
 830                  * been replaced by another one with different index.
 831                  * Don't do anything and return ok
 832                  */
 833                 spin_unlock_irqrestore(&priv->sta_lock, flags);
 834                 return 0;
 835         }
 836
 837         if (priv->stations[sta_id].sta.key.key_offset == WEP_INVALID_OFFSET) {
 838                 IWL_WARN(priv, "Removing wrong key %d 0x%x\n",
 839                             keyconf->keyidx, key_flags);
 840                 spin_unlock_irqrestore(&priv->sta_lock, flags);
 841                 return 0;
 842         }
 843
 844         if (!test_and_clear_bit(priv->stations[sta_id].sta.key.key_offset,
 845                 &priv->ucode_key_table))
 846                 IWL_ERR(priv, "index %d not used in uCode key table.\n",
 847                         priv->stations[sta_id].sta.key.key_offset);
 848         memset(&priv->stations[sta_id].keyinfo, 0,
 849                                         sizeof(struct iwl_hw_key));
 850         memset(&priv->stations[sta_id].sta.key, 0,
 851                                         sizeof(struct iwl4965_keyinfo));
 852         priv->stations[sta_id].sta.key.key_flags =
 853                         STA_KEY_FLG_NO_ENC | STA_KEY_FLG_INVALID;
 854         priv->stations[sta_id].sta.key.key_offset = WEP_INVALID_OFFSET;
 855         priv->stations[sta_id].sta.sta.modify_mask = STA_MODIFY_KEY_MASK;
 856         priv->stations[sta_id].sta.mode = STA_CONTROL_MODIFY_MSK;
 857
 858         if (iwl_is_rfkill(priv)) {
 859                 IWL_DEBUG_WEP(priv, "Not sending REPLY_ADD_STA command because RFKILL enabled. \n");
 860                 spin_unlock_irqrestore(&priv->sta_lock, flags);
 861                 return 0;
 862         }
 863         ret =  iwl_send_add_sta(priv, &priv->stations[sta_id].sta, CMD_ASYNC);
 864         spin_unlock_irqrestore(&priv->sta_lock, flags);
 865         return ret;
 866 }
 867 EXPORT_SYMBOL(iwl_remove_dynamic_key);
 868
 869 int iwl_set_dynamic_key(struct iwl_priv *priv,
 870                                 struct ieee80211_key_conf *keyconf, u8 sta_id)
 871 {
 872         int ret;
 873
 874         priv->key_mapping_key++;
 875         keyconf->hw_key_idx = HW_KEY_DYNAMIC;
 876
 877         switch (keyconf->alg) {
 878         case ALG_CCMP:
 879                 ret = iwl_set_ccmp_dynamic_key_info(priv, keyconf, sta_id);
 880                 break;
 881         case ALG_TKIP:
 882                 ret = iwl_set_tkip_dynamic_key_info(priv, keyconf, sta_id);
 883                 break;
 884         case ALG_WEP:
 885                 ret = iwl_set_wep_dynamic_key_info(priv, keyconf, sta_id);
 886                 break;
 887         default:
 888                 IWL_ERR(priv,
 889                         "Unknown alg: %s alg = %d\n", __func__, keyconf->alg);
 890                 ret = -EINVAL;
 891         }
 892
 893         IWL_DEBUG_WEP(priv, "Set dynamic key: alg= %d len=%d idx=%d sta=%d ret=%d\n",
 894                       keyconf->alg, keyconf->keylen, keyconf->keyidx,
 895                       sta_id, ret);
 896
 897         return ret;
 898 }
 899 EXPORT_SYMBOL(iwl_set_dynamic_key);
 900
 901 #ifdef CONFIG_IWLWIFI_DEBUG
 902 static void iwl_dump_lq_cmd(struct iwl_priv *priv,
 903                            struct iwl_link_quality_cmd *lq)
 904 {
 905         int i;
 906         IWL_DEBUG_RATE(priv, "lq station id 0x%x\n", lq->sta_id);
 907         IWL_DEBUG_RATE(priv, "lq ant 0x%X 0x%X\n",
 908                        lq->general_params.single_stream_ant_msk,
 909                        lq->general_params.dual_stream_ant_msk);
 910
 911         for (i = 0; i < LINK_QUAL_MAX_RETRY_NUM; i++)
 912                 IWL_DEBUG_RATE(priv, "lq index %d 0x%X\n",
 913                                i, lq->rs_table[i].rate_n_flags);
 914 }
 915 #else
 916 static inline void iwl_dump_lq_cmd(struct iwl_priv *priv,
 917                                    struct iwl_link_quality_cmd *lq)
 918 {
 919 }
 920 #endif
 921
 922 int iwl_send_lq_cmd(struct iwl_priv *priv,
 923                     struct iwl_link_quality_cmd *lq, u8 flags)
 924 {
 925         struct iwl_host_cmd cmd = {
 926                 .id = REPLY_TX_LINK_QUALITY_CMD,
 927                 .len = sizeof(struct iwl_link_quality_cmd),
 928                 .flags = flags,
 929                 .data = lq,
 930         };
 931
 932         if ((lq->sta_id == 0xFF) &&
 933             (priv->iw_mode == NL80211_IFTYPE_ADHOC))
 934                 return -EINVAL;
 935
 936         if (lq->sta_id == 0xFF)
 937                 lq->sta_id = IWL_AP_ID;
 938
 939         iwl_dump_lq_cmd(priv, lq);
 940
 941         if (iwl_is_associated(priv) && priv->assoc_station_added)
 942                 return  iwl_send_cmd(priv, &cmd);
 943
 944         return 0;
 945 }
 946 EXPORT_SYMBOL(iwl_send_lq_cmd);
 947
 948 /**
 949  * iwl_sta_init_lq - Initialize a station's hardware rate table
 950  *
 951  * The uCode's station table contains a table of fallback rates
 952  * for automatic fallback during transmission.
 953  *
 954  * NOTE: This sets up a default set of values.  These will be replaced later
 955  *       if the driver's iwl-agn-rs rate scaling algorithm is used, instead of
 956  *       rc80211_simple.
 957  *
 958  * NOTE: Run REPLY_ADD_STA command to set up station table entry, before
 959  *       calling this function (which runs REPLY_TX_LINK_QUALITY_CMD,
 960  *       which requires station table entry to exist).
 961  */
 962 static void iwl_sta_init_lq(struct iwl_priv *priv, const u8 *addr, bool is_ap)
 963 {
 964         int i, r;
 965         struct iwl_link_quality_cmd link_cmd = {
 966                 .reserved1 = 0,
 967         };
 968         u32 rate_flags;
 969
 970         /* Set up the rate scaling to start at selected rate, fall back
 971          * all the way down to 1M in IEEE order, and then spin on 1M */
 972         if (is_ap)
 973                 r = IWL_RATE_54M_INDEX;
 974         else if (priv->band == IEEE80211_BAND_5GHZ)
 975                 r = IWL_RATE_6M_INDEX;
 976         else
 977                 r = IWL_RATE_1M_INDEX;
 978
 979         for (i = 0; i < LINK_QUAL_MAX_RETRY_NUM; i++) {
 980                 rate_flags = 0;
 981                 if (r >= IWL_FIRST_CCK_RATE && r <= IWL_LAST_CCK_RATE)
 982                         rate_flags |= RATE_MCS_CCK_MSK;
 983
 984                 rate_flags |= first_antenna(priv->hw_params.valid_tx_ant) <<
 985                                 RATE_MCS_ANT_POS;
 986
 987                 link_cmd.rs_table[i].rate_n_flags =
 988                         iwl_hw_set_rate_n_flags(iwl_rates[r].plcp, rate_flags);
 989                 r = iwl_get_prev_ieee_rate(r);
 990         }
 991
 992         link_cmd.general_params.single_stream_ant_msk =
 993                                 first_antenna(priv->hw_params.valid_tx_ant);
 994         link_cmd.general_params.dual_stream_ant_msk = 3;
 995         link_cmd.agg_params.agg_dis_start_th = LINK_QUAL_AGG_DISABLE_START_DEF;
 996         link_cmd.agg_params.agg_time_limit =
 997                 cpu_to_le16(LINK_QUAL_AGG_TIME_LIMIT_DEF);
 998
 999         /* Update the rate scaling for control frame Tx to AP */
1000         link_cmd.sta_id = is_ap ? IWL_AP_ID : priv->hw_params.bcast_sta_id;
1001
1002         iwl_send_cmd_pdu_async(priv, REPLY_TX_LINK_QUALITY_CMD,
1003                                sizeof(link_cmd), &link_cmd, NULL);
1004 }
1005
1006 /**
1007  * iwl_rxon_add_station - add station into station table.
1008  *
1009  * there is only one AP station with id= IWL_AP_ID
1010  * NOTE: mutex must be held before calling this function
1011  */
1012 int iwl_rxon_add_station(struct iwl_priv *priv, const u8 *addr, bool is_ap)
1013 {
1014         struct ieee80211_sta *sta;
1015         struct ieee80211_sta_ht_cap ht_config;
1016         struct ieee80211_sta_ht_cap *cur_ht_config = NULL;
1017         u8 sta_id;
1018
1019         /* Add station to device's station table */
1020
1021         /*
1022          * XXX: This check is definitely not correct, if we're an AP
1023          *      it'll always be false which is not what we want, but
1024          *      it doesn't look like iwlagn is prepared to be an HT
1025          *      AP anyway.
1026          */
1027         if (priv->current_ht_config.is_ht) {
1028                 rcu_read_lock();
1029                 sta = ieee80211_find_sta(priv->hw, addr);
1030                 if (sta) {
1031                         memcpy(&ht_config, &sta->ht_cap, sizeof(ht_config));
1032                         cur_ht_config = &ht_config;
1033                 }
1034                 rcu_read_unlock();
1035         }
1036
1037         sta_id = iwl_add_station(priv, addr, is_ap, CMD_SYNC, cur_ht_config);
1038
1039         /* Set up default rate scaling table in device's station table */
1040         iwl_sta_init_lq(priv, addr, is_ap);
1041
1042         return sta_id;
1043 }
1044 EXPORT_SYMBOL(iwl_rxon_add_station);
1045
1046 /**
1047  * iwl_get_sta_id - Find station's index within station table
1048  *
1049  * If new IBSS station, create new entry in station table
1050  */
1051 int iwl_get_sta_id(struct iwl_priv *priv, struct ieee80211_hdr *hdr)
1052 {
1053         int sta_id;
1054         __le16 fc = hdr->frame_control;
1055
1056         /* If this frame is broadcast or management, use broadcast station id */
1057         if (!ieee80211_is_data(fc) ||  is_multicast_ether_addr(hdr->addr1))
1058                 return priv->hw_params.bcast_sta_id;
1059
1060         switch (priv->iw_mode) {
1061
1062         /* If we are a client station in a BSS network, use the special
1063          * AP station entry (that's the only station we communicate with) */
1064         case NL80211_IFTYPE_STATION:
1065                 return IWL_AP_ID;
1066
1067         /* If we are an AP, then find the station, or use BCAST */
1068         case NL80211_IFTYPE_AP:
1069                 sta_id = iwl_find_station(priv, hdr->addr1);
1070                 if (sta_id != IWL_INVALID_STATION)
1071                         return sta_id;
1072                 return priv->hw_params.bcast_sta_id;
1073
1074         /* If this frame is going out to an IBSS network, find the station,
1075          * or create a new station table entry */
1076         case NL80211_IFTYPE_ADHOC:
1077                 sta_id = iwl_find_station(priv, hdr->addr1);
1078                 if (sta_id != IWL_INVALID_STATION)
1079                         return sta_id;
1080
1081                 /* Create new station table entry */
1082                 sta_id = iwl_add_station(priv, hdr->addr1, false,
1083                                         CMD_ASYNC, NULL);
1084
1085                 if (sta_id != IWL_INVALID_STATION)
1086                         return sta_id;
1087
1088                 IWL_DEBUG_DROP(priv, "Station %pM not in station map. "
1089                                "Defaulting to broadcast...\n",
1090                                hdr->addr1);
1091                 iwl_print_hex_dump(priv, IWL_DL_DROP, (u8 *) hdr, sizeof(*hdr));
1092                 return priv->hw_params.bcast_sta_id;
1093
1094         default:
1095                 IWL_WARN(priv, "Unknown mode of operation: %d\n",
1096                         priv->iw_mode);
1097                 return priv->hw_params.bcast_sta_id;
1098         }
1099 }
1100 EXPORT_SYMBOL(iwl_get_sta_id);
1101
1102 /**
1103  * iwl_sta_tx_modify_enable_tid - Enable Tx for this TID in station table
1104  */
1105 void iwl_sta_tx_modify_enable_tid(struct iwl_priv *priv, int sta_id, int tid)
1106 {
1107         unsigned long flags;
1108
1109         /* Remove "disable" flag, to enable Tx for this TID */
1110         spin_lock_irqsave(&priv->sta_lock, flags);
1111         priv->stations[sta_id].sta.sta.modify_mask = STA_MODIFY_TID_DISABLE_TX;
1112         priv->stations[sta_id].sta.tid_disable_tx &= cpu_to_le16(~(1 << tid));
1113         priv->stations[sta_id].sta.mode = STA_CONTROL_MODIFY_MSK;
1114         spin_unlock_irqrestore(&priv->sta_lock, flags);
1115
1116         iwl_send_add_sta(priv, &priv->stations[sta_id].sta, CMD_ASYNC);
1117 }
1118 EXPORT_SYMBOL(iwl_sta_tx_modify_enable_tid);
1119
1120 int iwl_sta_rx_agg_start(struct iwl_priv *priv,
1121                          const u8 *addr, int tid, u16 ssn)
1122 {
1123         unsigned long flags;
1124         int sta_id;
1125
1126         sta_id = iwl_find_station(priv, addr);
1127         if (sta_id == IWL_INVALID_STATION)
1128                 return -ENXIO;
1129
1130         spin_lock_irqsave(&priv->sta_lock, flags);
1131         priv->stations[sta_id].sta.station_flags_msk = 0;
1132         priv->stations[sta_id].sta.sta.modify_mask = STA_MODIFY_ADDBA_TID_MSK;
1133         priv->stations[sta_id].sta.add_immediate_ba_tid = (u8)tid;
1134         priv->stations[sta_id].sta.add_immediate_ba_ssn = cpu_to_le16(ssn);
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_start);
1142
1143 int iwl_sta_rx_agg_stop(struct iwl_priv *priv, const u8 *addr, int tid)
1144 {
1145         unsigned long flags;
1146         int sta_id;
1147
1148         sta_id = iwl_find_station(priv, addr);
1149         if (sta_id == IWL_INVALID_STATION) {
1150                 IWL_ERR(priv, "Invalid station for AGG tid %d\n", tid);
1151                 return -ENXIO;
1152         }
1153
1154         spin_lock_irqsave(&priv->sta_lock, flags);
1155         priv->stations[sta_id].sta.station_flags_msk = 0;
1156         priv->stations[sta_id].sta.sta.modify_mask = STA_MODIFY_DELBA_TID_MSK;
1157         priv->stations[sta_id].sta.remove_immediate_ba_tid = (u8)tid;
1158         priv->stations[sta_id].sta.mode = STA_CONTROL_MODIFY_MSK;
1159         spin_unlock_irqrestore(&priv->sta_lock, flags);
1160
1161         return iwl_send_add_sta(priv, &priv->stations[sta_id].sta,
1162                                         CMD_ASYNC);
1163 }
1164 EXPORT_SYMBOL(iwl_sta_rx_agg_stop);
1165
1166 static void iwl_sta_modify_ps_wake(struct iwl_priv *priv, int sta_id)
1167 {
1168         unsigned long flags;
1169
1170         spin_lock_irqsave(&priv->sta_lock, flags);
1171         priv->stations[sta_id].sta.station_flags &= ~STA_FLG_PWR_SAVE_MSK;
1172         priv->stations[sta_id].sta.station_flags_msk = STA_FLG_PWR_SAVE_MSK;
1173         priv->stations[sta_id].sta.sta.modify_mask = 0;
1174         priv->stations[sta_id].sta.mode = STA_CONTROL_MODIFY_MSK;
1175         spin_unlock_irqrestore(&priv->sta_lock, flags);
1176
1177         iwl_send_add_sta(priv, &priv->stations[sta_id].sta, CMD_ASYNC);
1178 }
1179
1180 void iwl_update_ps_mode(struct iwl_priv *priv, u16 ps_bit, u8 *addr)
1181 {
1182         /* FIXME: need locking over ps_status ??? */
1183         u8 sta_id = iwl_find_station(priv, addr);
1184
1185         if (sta_id != IWL_INVALID_STATION) {
1186                 u8 sta_awake = priv->stations[sta_id].
1187                                 ps_status == STA_PS_STATUS_WAKE;
1188
1189                 if (sta_awake && ps_bit)
1190                         priv->stations[sta_id].ps_status = STA_PS_STATUS_SLEEP;
1191                 else if (!sta_awake && !ps_bit) {
1192                         iwl_sta_modify_ps_wake(priv, sta_id);
1193                         priv->stations[sta_id].ps_status = STA_PS_STATUS_WAKE;
1194                 }
1195         }
1196 }
1197