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 void iwl_add_sta_callback(struct iwl_priv *priv,
 101                                  struct iwl_device_cmd *cmd,
 102                                  struct iwl_rx_packet *pkt)
 103 {
 104         struct iwl_addsta_cmd *addsta =
 105                 (struct iwl_addsta_cmd *)cmd->cmd.payload;
 106         u8 sta_id = addsta->sta.sta_id;
 107
 108         if (pkt->hdr.flags & IWL_CMD_FAILED_MSK) {
 109                 IWL_ERR(priv, "Bad return from REPLY_ADD_STA (0x%08X)\n",
 110                           pkt->hdr.flags);
 111                 return;
 112         }
 113
 114         switch (pkt->u.add_sta.status) {
 115         case ADD_STA_SUCCESS_MSK:
 116                 iwl_sta_ucode_activate(priv, sta_id);
 117                  /* fall through */
 118         default:
 119                 IWL_DEBUG_HC(priv, "Received REPLY_ADD_STA:(0x%08X)\n",
 120                              pkt->u.add_sta.status);
 121                 break;
 122         }
 123 }
 124
 125 int iwl_send_add_sta(struct iwl_priv *priv,
 126                      struct iwl_addsta_cmd *sta, u8 flags)
 127 {
 128         struct iwl_rx_packet *pkt = NULL;
 129         int ret = 0;
 130         u8 data[sizeof(*sta)];
 131         struct iwl_host_cmd cmd = {
 132                 .id = REPLY_ADD_STA,
 133                 .flags = flags,
 134                 .data = data,
 135         };
 136
 137         if (flags & CMD_ASYNC)
 138                 cmd.callback = iwl_add_sta_callback;
 139         else
 140                 cmd.flags |= CMD_WANT_SKB;
 141
 142         cmd.len = priv->cfg->ops->utils->build_addsta_hcmd(sta, data);
 143         ret = iwl_send_cmd(priv, &cmd);
 144
 145         if (ret || (flags & CMD_ASYNC))
 146                 return ret;
 147
 148         pkt = (struct iwl_rx_packet *)cmd.reply_page;
 149         if (pkt->hdr.flags & IWL_CMD_FAILED_MSK) {
 150                 IWL_ERR(priv, "Bad return from REPLY_ADD_STA (0x%08X)\n",
 151                           pkt->hdr.flags);
 152                 ret = -EIO;
 153         }
 154
 155         if (ret == 0) {
 156                 switch (pkt->u.add_sta.status) {
 157                 case ADD_STA_SUCCESS_MSK:
 158                         iwl_sta_ucode_activate(priv, sta->sta.sta_id);
 159                         IWL_DEBUG_INFO(priv, "REPLY_ADD_STA PASSED\n");
 160                         break;
 161                 default:
 162                         ret = -EIO;
 163                         IWL_WARN(priv, "REPLY_ADD_STA failed\n");
 164                         break;
 165                 }
 166         }
 167
 168         priv->alloc_rxb_page--;
 169         free_pages(cmd.reply_page, priv->hw_params.rx_page_order);
 170
 171         return ret;
 172 }
 173 EXPORT_SYMBOL(iwl_send_add_sta);
 174
 175 static void iwl_set_ht_add_station(struct iwl_priv *priv, u8 index,
 176                                    struct ieee80211_sta_ht_cap *sta_ht_inf)
 177 {
 178         __le32 sta_flags;
 179         u8 mimo_ps_mode;
 180
 181         if (!sta_ht_inf || !sta_ht_inf->ht_supported)
 182                 goto done;
 183
 184         mimo_ps_mode = (sta_ht_inf->cap & IEEE80211_HT_CAP_SM_PS) >> 2;
 185         IWL_DEBUG_ASSOC(priv, "spatial multiplexing power save mode: %s\n",
 186                         (mimo_ps_mode == WLAN_HT_CAP_SM_PS_STATIC) ?
 187                         "static" :
 188                         (mimo_ps_mode == WLAN_HT_CAP_SM_PS_DYNAMIC) ?
 189                         "dynamic" : "disabled");
 190
 191         sta_flags = priv->stations[index].sta.station_flags;
 192
 193         sta_flags &= ~(STA_FLG_RTS_MIMO_PROT_MSK | STA_FLG_MIMO_DIS_MSK);
 194
 195         switch (mimo_ps_mode) {
 196         case WLAN_HT_CAP_SM_PS_STATIC:
 197                 sta_flags |= STA_FLG_MIMO_DIS_MSK;
 198                 break;
 199         case WLAN_HT_CAP_SM_PS_DYNAMIC:
 200                 sta_flags |= STA_FLG_RTS_MIMO_PROT_MSK;
 201                 break;
 202         case WLAN_HT_CAP_SM_PS_DISABLED:
 203                 break;
 204         default:
 205                 IWL_WARN(priv, "Invalid MIMO PS mode %d\n", mimo_ps_mode);
 206                 break;
 207         }
 208
 209         sta_flags |= cpu_to_le32(
 210               (u32)sta_ht_inf->ampdu_factor << STA_FLG_MAX_AGG_SIZE_POS);
 211
 212         sta_flags |= cpu_to_le32(
 213               (u32)sta_ht_inf->ampdu_density << STA_FLG_AGG_MPDU_DENSITY_POS);
 214
 215         if (iwl_is_ht40_tx_allowed(priv, sta_ht_inf))
 216                 sta_flags |= STA_FLG_HT40_EN_MSK;
 217         else
 218                 sta_flags &= ~STA_FLG_HT40_EN_MSK;
 219
 220         priv->stations[index].sta.station_flags = sta_flags;
 221  done:
 222         return;
 223 }
 224
 225 /**
 226  * iwl_add_station - Add station to tables in driver and device
 227  */
 228 u8 iwl_add_station(struct iwl_priv *priv, const u8 *addr, bool is_ap, u8 flags,
 229                 struct ieee80211_sta_ht_cap *ht_info)
 230 {
 231         struct iwl_station_entry *station;
 232         unsigned long flags_spin;
 233         int i;
 234         int sta_id = IWL_INVALID_STATION;
 235         u16 rate;
 236
 237         spin_lock_irqsave(&priv->sta_lock, flags_spin);
 238         if (is_ap)
 239                 sta_id = IWL_AP_ID;
 240         else if (is_broadcast_ether_addr(addr))
 241                 sta_id = priv->hw_params.bcast_sta_id;
 242         else
 243                 for (i = IWL_STA_ID; i < priv->hw_params.max_stations; i++) {
 244                         if (!compare_ether_addr(priv->stations[i].sta.sta.addr,
 245                                                 addr)) {
 246                                 sta_id = i;
 247                                 break;
 248                         }
 249
 250                         if (!priv->stations[i].used &&
 251                             sta_id == IWL_INVALID_STATION)
 252                                 sta_id = i;
 253                 }
 254
 255         /* These two conditions have the same outcome, but keep them separate
 256            since they have different meanings */
 257         if (unlikely(sta_id == IWL_INVALID_STATION)) {
 258                 spin_unlock_irqrestore(&priv->sta_lock, flags_spin);
 259                 return sta_id;
 260         }
 261
 262         if (priv->stations[sta_id].used &&
 263             !compare_ether_addr(priv->stations[sta_id].sta.sta.addr, addr)) {
 264                 spin_unlock_irqrestore(&priv->sta_lock, flags_spin);
 265                 return sta_id;
 266         }
 267
 268
 269         station = &priv->stations[sta_id];
 270         station->used = IWL_STA_DRIVER_ACTIVE;
 271         IWL_DEBUG_ASSOC(priv, "Add STA to driver ID %d: %pM\n",
 272                         sta_id, addr);
 273         priv->num_stations++;
 274
 275         /* Set up the REPLY_ADD_STA command to send to device */
 276         memset(&station->sta, 0, sizeof(struct iwl_addsta_cmd));
 277         memcpy(station->sta.sta.addr, addr, ETH_ALEN);
 278         station->sta.mode = 0;
 279         station->sta.sta.sta_id = sta_id;
 280         station->sta.station_flags = 0;
 281
 282         /* BCAST station and IBSS stations do not work in HT mode */
 283         if (sta_id != priv->hw_params.bcast_sta_id &&
 284             priv->iw_mode != NL80211_IFTYPE_ADHOC)
 285                 iwl_set_ht_add_station(priv, sta_id, ht_info);
 286
 287         /* 3945 only */
 288         rate = (priv->band == IEEE80211_BAND_5GHZ) ?
 289                 IWL_RATE_6M_PLCP : IWL_RATE_1M_PLCP;
 290         /* Turn on both antennas for the station... */
 291         station->sta.rate_n_flags = cpu_to_le16(rate | RATE_MCS_ANT_AB_MSK);
 292
 293         spin_unlock_irqrestore(&priv->sta_lock, flags_spin);
 294
 295         /* Add station to device's station table */
 296         iwl_send_add_sta(priv, &station->sta, flags);
 297         return sta_id;
 298
 299 }
 300 EXPORT_SYMBOL(iwl_add_station);
 301
 302 static void iwl_sta_ucode_deactivate(struct iwl_priv *priv, const char *addr)
 303 {
 304         unsigned long flags;
 305         u8 sta_id = iwl_find_station(priv, addr);
 306
 307         BUG_ON(sta_id == IWL_INVALID_STATION);
 308
 309         IWL_DEBUG_ASSOC(priv, "Removed STA from Ucode: %pM\n", addr);
 310
 311         spin_lock_irqsave(&priv->sta_lock, flags);
 312
 313         /* Ucode must be active and driver must be non active */
 314         if (priv->stations[sta_id].used != IWL_STA_UCODE_ACTIVE)
 315                 IWL_ERR(priv, "removed non active STA %d\n", sta_id);
 316
 317         priv->stations[sta_id].used &= ~IWL_STA_UCODE_ACTIVE;
 318
 319         memset(&priv->stations[sta_id], 0, sizeof(struct iwl_station_entry));
 320         spin_unlock_irqrestore(&priv->sta_lock, flags);
 321 }
 322
 323 static void iwl_remove_sta_callback(struct iwl_priv *priv,
 324                                     struct iwl_device_cmd *cmd,
 325                                     struct iwl_rx_packet *pkt)
 326 {
 327         struct iwl_rem_sta_cmd *rm_sta =
 328                         (struct iwl_rem_sta_cmd *)cmd->cmd.payload;
 329         const char *addr = rm_sta->addr;
 330
 331         if (pkt->hdr.flags & IWL_CMD_FAILED_MSK) {
 332                 IWL_ERR(priv, "Bad return from REPLY_REMOVE_STA (0x%08X)\n",
 333                 pkt->hdr.flags);
 334                 return;
 335         }
 336
 337         switch (pkt->u.rem_sta.status) {
 338         case REM_STA_SUCCESS_MSK:
 339                 iwl_sta_ucode_deactivate(priv, addr);
 340                 break;
 341         default:
 342                 IWL_ERR(priv, "REPLY_REMOVE_STA failed\n");
 343                 break;
 344         }
 345 }
 346
 347 static int iwl_send_remove_station(struct iwl_priv *priv, const u8 *addr,
 348                                    u8 flags)
 349 {
 350         struct iwl_rx_packet *pkt;
 351         int ret;
 352
 353         struct iwl_rem_sta_cmd rm_sta_cmd;
 354
 355         struct iwl_host_cmd cmd = {
 356                 .id = REPLY_REMOVE_STA,
 357                 .len = sizeof(struct iwl_rem_sta_cmd),
 358                 .flags = flags,
 359                 .data = &rm_sta_cmd,
 360         };
 361
 362         memset(&rm_sta_cmd, 0, sizeof(rm_sta_cmd));
 363         rm_sta_cmd.num_sta = 1;
 364         memcpy(&rm_sta_cmd.addr, addr , ETH_ALEN);
 365
 366         if (flags & CMD_ASYNC)
 367                 cmd.callback = iwl_remove_sta_callback;
 368         else
 369                 cmd.flags |= CMD_WANT_SKB;
 370         ret = iwl_send_cmd(priv, &cmd);
 371
 372         if (ret || (flags & CMD_ASYNC))
 373                 return ret;
 374
 375         pkt = (struct iwl_rx_packet *)cmd.reply_page;
 376         if (pkt->hdr.flags & IWL_CMD_FAILED_MSK) {
 377                 IWL_ERR(priv, "Bad return from REPLY_REMOVE_STA (0x%08X)\n",
 378                           pkt->hdr.flags);
 379                 ret = -EIO;
 380         }
 381
 382         if (!ret) {
 383                 switch (pkt->u.rem_sta.status) {
 384                 case REM_STA_SUCCESS_MSK:
 385                         iwl_sta_ucode_deactivate(priv, addr);
 386                         IWL_DEBUG_ASSOC(priv, "REPLY_REMOVE_STA PASSED\n");
 387                         break;
 388                 default:
 389                         ret = -EIO;
 390                         IWL_ERR(priv, "REPLY_REMOVE_STA failed\n");
 391                         break;
 392                 }
 393         }
 394
 395         priv->alloc_rxb_page--;
 396         free_pages(cmd.reply_page, priv->hw_params.rx_page_order);
 397
 398         return ret;
 399 }
 400
 401 /**
 402  * iwl_remove_station - Remove driver's knowledge of station.
 403  */
 404 int iwl_remove_station(struct iwl_priv *priv, const u8 *addr, bool is_ap)
 405 {
 406         int sta_id = IWL_INVALID_STATION;
 407         int i, ret = -EINVAL;
 408         unsigned long flags;
 409
 410         spin_lock_irqsave(&priv->sta_lock, flags);
 411
 412         if (is_ap)
 413                 sta_id = IWL_AP_ID;
 414         else if (is_broadcast_ether_addr(addr))
 415                 sta_id = priv->hw_params.bcast_sta_id;
 416         else
 417                 for (i = IWL_STA_ID; i < priv->hw_params.max_stations; i++)
 418                         if (priv->stations[i].used &&
 419                             !compare_ether_addr(priv->stations[i].sta.sta.addr,
 420                                                 addr)) {
 421                                 sta_id = i;
 422                                 break;
 423                         }
 424
 425         if (unlikely(sta_id == IWL_INVALID_STATION))
 426                 goto out;
 427
 428         IWL_DEBUG_ASSOC(priv, "Removing STA from driver:%d  %pM\n",
 429                 sta_id, addr);
 430
 431         if (!(priv->stations[sta_id].used & IWL_STA_DRIVER_ACTIVE)) {
 432                 IWL_ERR(priv, "Removing %pM but non DRIVER active\n",
 433                                 addr);
 434                 goto out;
 435         }
 436
 437         if (!(priv->stations[sta_id].used & IWL_STA_UCODE_ACTIVE)) {
 438                 IWL_ERR(priv, "Removing %pM but non UCODE active\n",
 439                                 addr);
 440                 goto out;
 441         }
 442
 443
 444         priv->stations[sta_id].used &= ~IWL_STA_DRIVER_ACTIVE;
 445
 446         priv->num_stations--;
 447
 448         BUG_ON(priv->num_stations < 0);
 449
 450         spin_unlock_irqrestore(&priv->sta_lock, flags);
 451
 452         ret = iwl_send_remove_station(priv, addr, CMD_ASYNC);
 453         return ret;
 454 out:
 455         spin_unlock_irqrestore(&priv->sta_lock, flags);
 456         return ret;
 457 }
 458
 459 /**
 460  * iwl_clear_stations_table - Clear the driver's station table
 461  *
 462  * NOTE:  This does not clear or otherwise alter the device's station table.
 463  */
 464 void iwl_clear_stations_table(struct iwl_priv *priv)
 465 {
 466         unsigned long flags;
 467         int i;
 468
 469         spin_lock_irqsave(&priv->sta_lock, flags);
 470
 471         if (iwl_is_alive(priv) &&
 472            !test_bit(STATUS_EXIT_PENDING, &priv->status) &&
 473            iwl_send_cmd_pdu_async(priv, REPLY_REMOVE_ALL_STA, 0, NULL, NULL))
 474                 IWL_ERR(priv, "Couldn't clear the station table\n");
 475
 476         priv->num_stations = 0;
 477         memset(priv->stations, 0, sizeof(priv->stations));
 478
 479         /* clean ucode key table bit map */
 480         priv->ucode_key_table = 0;
 481
 482         /* keep track of static keys */
 483         for (i = 0; i < WEP_KEYS_MAX ; i++) {
 484                 if (priv->wep_keys[i].key_size)
 485                         set_bit(i, &priv->ucode_key_table);
 486         }
 487
 488         spin_unlock_irqrestore(&priv->sta_lock, flags);
 489 }
 490 EXPORT_SYMBOL(iwl_clear_stations_table);
 491
 492 int iwl_get_free_ucode_key_index(struct iwl_priv *priv)
 493 {
 494         int i;
 495
 496         for (i = 0; i < STA_KEY_MAX_NUM; i++)
 497                 if (!test_and_set_bit(i, &priv->ucode_key_table))
 498                         return i;
 499
 500         return WEP_INVALID_OFFSET;
 501 }
 502 EXPORT_SYMBOL(iwl_get_free_ucode_key_index);
 503
 504 int iwl_send_static_wepkey_cmd(struct iwl_priv *priv, u8 send_if_empty)
 505 {
 506         int i, not_empty = 0;
 507         u8 buff[sizeof(struct iwl_wep_cmd) +
 508                 sizeof(struct iwl_wep_key) * WEP_KEYS_MAX];
 509         struct iwl_wep_cmd *wep_cmd = (struct iwl_wep_cmd *)buff;
 510         size_t cmd_size  = sizeof(struct iwl_wep_cmd);
 511         struct iwl_host_cmd cmd = {
 512                 .id = REPLY_WEPKEY,
 513                 .data = wep_cmd,
 514                 .flags = CMD_ASYNC,
 515         };
 516
 517         memset(wep_cmd, 0, cmd_size +
 518                         (sizeof(struct iwl_wep_key) * WEP_KEYS_MAX));
 519
 520         for (i = 0; i < WEP_KEYS_MAX ; i++) {
 521                 wep_cmd->key[i].key_index = i;
 522                 if (priv->wep_keys[i].key_size) {
 523                         wep_cmd->key[i].key_offset = i;
 524                         not_empty = 1;
 525                 } else {
 526                         wep_cmd->key[i].key_offset = WEP_INVALID_OFFSET;
 527                 }
 528
 529                 wep_cmd->key[i].key_size = priv->wep_keys[i].key_size;
 530                 memcpy(&wep_cmd->key[i].key[3], priv->wep_keys[i].key,
 531                                 priv->wep_keys[i].key_size);
 532         }
 533
 534         wep_cmd->global_key_type = WEP_KEY_WEP_TYPE;
 535         wep_cmd->num_keys = WEP_KEYS_MAX;
 536
 537         cmd_size += sizeof(struct iwl_wep_key) * WEP_KEYS_MAX;
 538
 539         cmd.len = cmd_size;
 540
 541         if (not_empty || send_if_empty)
 542                 return iwl_send_cmd(priv, &cmd);
 543         else
 544                 return 0;
 545 }
 546 EXPORT_SYMBOL(iwl_send_static_wepkey_cmd);
 547
 548 int iwl_remove_default_wep_key(struct iwl_priv *priv,
 549                                struct ieee80211_key_conf *keyconf)
 550 {
 551         int ret;
 552         unsigned long flags;
 553
 554         spin_lock_irqsave(&priv->sta_lock, flags);
 555         IWL_DEBUG_WEP(priv, "Removing default WEP key: idx=%d\n",
 556                       keyconf->keyidx);
 557
 558         if (!test_and_clear_bit(keyconf->keyidx, &priv->ucode_key_table))
 559                 IWL_ERR(priv, "index %d not used in uCode key table.\n",
 560                           keyconf->keyidx);
 561
 562         priv->default_wep_key--;
 563         memset(&priv->wep_keys[keyconf->keyidx], 0, sizeof(priv->wep_keys[0]));
 564         if (iwl_is_rfkill(priv)) {
 565                 IWL_DEBUG_WEP(priv, "Not sending REPLY_WEPKEY command due to RFKILL.\n");
 566                 spin_unlock_irqrestore(&priv->sta_lock, flags);
 567                 return 0;
 568         }
 569         ret = iwl_send_static_wepkey_cmd(priv, 1);
 570         IWL_DEBUG_WEP(priv, "Remove default WEP key: idx=%d ret=%d\n",
 571                       keyconf->keyidx, ret);
 572         spin_unlock_irqrestore(&priv->sta_lock, flags);
 573
 574         return ret;
 575 }
 576 EXPORT_SYMBOL(iwl_remove_default_wep_key);
 577
 578 int iwl_set_default_wep_key(struct iwl_priv *priv,
 579                             struct ieee80211_key_conf *keyconf)
 580 {
 581         int ret;
 582         unsigned long flags;
 583
 584         if (keyconf->keylen != WEP_KEY_LEN_128 &&
 585             keyconf->keylen != WEP_KEY_LEN_64) {
 586                 IWL_DEBUG_WEP(priv, "Bad WEP key length %d\n", keyconf->keylen);
 587                 return -EINVAL;
 588         }
 589
 590         keyconf->flags &= ~IEEE80211_KEY_FLAG_GENERATE_IV;
 591         keyconf->hw_key_idx = HW_KEY_DEFAULT;
 592         priv->stations[IWL_AP_ID].keyinfo.alg = ALG_WEP;
 593
 594         spin_lock_irqsave(&priv->sta_lock, flags);
 595         priv->default_wep_key++;
 596
 597         if (test_and_set_bit(keyconf->keyidx, &priv->ucode_key_table))
 598                 IWL_ERR(priv, "index %d already used in uCode key table.\n",
 599                         keyconf->keyidx);
 600
 601         priv->wep_keys[keyconf->keyidx].key_size = keyconf->keylen;
 602         memcpy(&priv->wep_keys[keyconf->keyidx].key, &keyconf->key,
 603                                                         keyconf->keylen);
 604
 605         ret = iwl_send_static_wepkey_cmd(priv, 0);
 606         IWL_DEBUG_WEP(priv, "Set default WEP key: len=%d idx=%d ret=%d\n",
 607                 keyconf->keylen, keyconf->keyidx, ret);
 608         spin_unlock_irqrestore(&priv->sta_lock, flags);
 609
 610         return ret;
 611 }
 612 EXPORT_SYMBOL(iwl_set_default_wep_key);
 613
 614 static int iwl_set_wep_dynamic_key_info(struct iwl_priv *priv,
 615                                 struct ieee80211_key_conf *keyconf,
 616                                 u8 sta_id)
 617 {
 618         unsigned long flags;
 619         __le16 key_flags = 0;
 620         int ret;
 621
 622         keyconf->flags &= ~IEEE80211_KEY_FLAG_GENERATE_IV;
 623
 624         key_flags |= (STA_KEY_FLG_WEP | STA_KEY_FLG_MAP_KEY_MSK);
 625         key_flags |= cpu_to_le16(keyconf->keyidx << STA_KEY_FLG_KEYID_POS);
 626         key_flags &= ~STA_KEY_FLG_INVALID;
 627
 628         if (keyconf->keylen == WEP_KEY_LEN_128)
 629                 key_flags |= STA_KEY_FLG_KEY_SIZE_MSK;
 630
 631         if (sta_id == priv->hw_params.bcast_sta_id)
 632                 key_flags |= STA_KEY_MULTICAST_MSK;
 633
 634         spin_lock_irqsave(&priv->sta_lock, flags);
 635
 636         priv->stations[sta_id].keyinfo.alg = keyconf->alg;
 637         priv->stations[sta_id].keyinfo.keylen = keyconf->keylen;
 638         priv->stations[sta_id].keyinfo.keyidx = keyconf->keyidx;
 639
 640         memcpy(priv->stations[sta_id].keyinfo.key,
 641                                 keyconf->key, keyconf->keylen);
 642
 643         memcpy(&priv->stations[sta_id].sta.key.key[3],
 644                                 keyconf->key, keyconf->keylen);
 645
 646         if ((priv->stations[sta_id].sta.key.key_flags & STA_KEY_FLG_ENCRYPT_MSK)
 647                         == STA_KEY_FLG_NO_ENC)
 648                 priv->stations[sta_id].sta.key.key_offset =
 649                                  iwl_get_free_ucode_key_index(priv);
 650         /* else, we are overriding an existing key => no need to allocated room
 651          * in uCode. */
 652
 653         WARN(priv->stations[sta_id].sta.key.key_offset == WEP_INVALID_OFFSET,
 654                 "no space for a new key");
 655
 656         priv->stations[sta_id].sta.key.key_flags = key_flags;
 657         priv->stations[sta_id].sta.sta.modify_mask = STA_MODIFY_KEY_MASK;
 658         priv->stations[sta_id].sta.mode = STA_CONTROL_MODIFY_MSK;
 659
 660         ret = iwl_send_add_sta(priv, &priv->stations[sta_id].sta, CMD_ASYNC);
 661
 662         spin_unlock_irqrestore(&priv->sta_lock, flags);
 663
 664         return ret;
 665 }
 666
 667 static int iwl_set_ccmp_dynamic_key_info(struct iwl_priv *priv,
 668                                    struct ieee80211_key_conf *keyconf,
 669                                    u8 sta_id)
 670 {
 671         unsigned long flags;
 672         __le16 key_flags = 0;
 673         int ret;
 674
 675         key_flags |= (STA_KEY_FLG_CCMP | STA_KEY_FLG_MAP_KEY_MSK);
 676         key_flags |= cpu_to_le16(keyconf->keyidx << STA_KEY_FLG_KEYID_POS);
 677         key_flags &= ~STA_KEY_FLG_INVALID;
 678
 679         if (sta_id == priv->hw_params.bcast_sta_id)
 680                 key_flags |= STA_KEY_MULTICAST_MSK;
 681
 682         keyconf->flags |= IEEE80211_KEY_FLAG_GENERATE_IV;
 683
 684         spin_lock_irqsave(&priv->sta_lock, flags);
 685         priv->stations[sta_id].keyinfo.alg = keyconf->alg;
 686         priv->stations[sta_id].keyinfo.keylen = keyconf->keylen;
 687
 688         memcpy(priv->stations[sta_id].keyinfo.key, keyconf->key,
 689                keyconf->keylen);
 690
 691         memcpy(priv->stations[sta_id].sta.key.key, keyconf->key,
 692                keyconf->keylen);
 693
 694         if ((priv->stations[sta_id].sta.key.key_flags & STA_KEY_FLG_ENCRYPT_MSK)
 695                         == STA_KEY_FLG_NO_ENC)
 696                 priv->stations[sta_id].sta.key.key_offset =
 697                                  iwl_get_free_ucode_key_index(priv);
 698         /* else, we are overriding an existing key => no need to allocated room
 699          * in uCode. */
 700
 701         WARN(priv->stations[sta_id].sta.key.key_offset == WEP_INVALID_OFFSET,
 702                 "no space for a new key");
 703
 704         priv->stations[sta_id].sta.key.key_flags = key_flags;
 705         priv->stations[sta_id].sta.sta.modify_mask = STA_MODIFY_KEY_MASK;
 706         priv->stations[sta_id].sta.mode = STA_CONTROL_MODIFY_MSK;
 707
 708         ret = iwl_send_add_sta(priv, &priv->stations[sta_id].sta, CMD_ASYNC);
 709
 710         spin_unlock_irqrestore(&priv->sta_lock, flags);
 711
 712         return ret;
 713 }
 714
 715 static int iwl_set_tkip_dynamic_key_info(struct iwl_priv *priv,
 716                                    struct ieee80211_key_conf *keyconf,
 717                                    u8 sta_id)
 718 {
 719         unsigned long flags;
 720         int ret = 0;
 721         __le16 key_flags = 0;
 722
 723         key_flags |= (STA_KEY_FLG_TKIP | STA_KEY_FLG_MAP_KEY_MSK);
 724         key_flags |= cpu_to_le16(keyconf->keyidx << STA_KEY_FLG_KEYID_POS);
 725         key_flags &= ~STA_KEY_FLG_INVALID;
 726
 727         if (sta_id == priv->hw_params.bcast_sta_id)
 728                 key_flags |= STA_KEY_MULTICAST_MSK;
 729
 730         keyconf->flags |= IEEE80211_KEY_FLAG_GENERATE_IV;
 731         keyconf->flags |= IEEE80211_KEY_FLAG_GENERATE_MMIC;
 732
 733         spin_lock_irqsave(&priv->sta_lock, flags);
 734
 735         priv->stations[sta_id].keyinfo.alg = keyconf->alg;
 736         priv->stations[sta_id].keyinfo.keylen = 16;
 737
 738         if ((priv->stations[sta_id].sta.key.key_flags & STA_KEY_FLG_ENCRYPT_MSK)
 739                         == STA_KEY_FLG_NO_ENC)
 740                 priv->stations[sta_id].sta.key.key_offset =
 741                                  iwl_get_free_ucode_key_index(priv);
 742         /* else, we are overriding an existing key => no need to allocated room
 743          * in uCode. */
 744
 745         WARN(priv->stations[sta_id].sta.key.key_offset == WEP_INVALID_OFFSET,
 746                 "no space for a new key");
 747
 748         priv->stations[sta_id].sta.key.key_flags = key_flags;
 749
 750
 751         /* This copy is acutally not needed: we get the key with each TX */
 752         memcpy(priv->stations[sta_id].keyinfo.key, keyconf->key, 16);
 753
 754         memcpy(priv->stations[sta_id].sta.key.key, keyconf->key, 16);
 755
 756         spin_unlock_irqrestore(&priv->sta_lock, flags);
 757
 758         return ret;
 759 }
 760
 761 void iwl_update_tkip_key(struct iwl_priv *priv,
 762                         struct ieee80211_key_conf *keyconf,
 763                         const u8 *addr, u32 iv32, u16 *phase1key)
 764 {
 765         u8 sta_id = IWL_INVALID_STATION;
 766         unsigned long flags;
 767         int i;
 768
 769         sta_id = iwl_find_station(priv, addr);
 770         if (sta_id == IWL_INVALID_STATION) {
 771                 IWL_DEBUG_MAC80211(priv, "leave - %pM not in station map.\n",
 772                                    addr);
 773                 return;
 774         }
 775
 776         if (iwl_scan_cancel(priv)) {
 777                 /* cancel scan failed, just live w/ bad key and rely
 778                    briefly on SW decryption */
 779                 return;
 780         }
 781
 782         spin_lock_irqsave(&priv->sta_lock, flags);
 783
 784         priv->stations[sta_id].sta.key.tkip_rx_tsc_byte2 = (u8) iv32;
 785
 786         for (i = 0; i < 5; i++)
 787                 priv->stations[sta_id].sta.key.tkip_rx_ttak[i] =
 788                         cpu_to_le16(phase1key[i]);
 789
 790         priv->stations[sta_id].sta.sta.modify_mask = STA_MODIFY_KEY_MASK;
 791         priv->stations[sta_id].sta.mode = STA_CONTROL_MODIFY_MSK;
 792
 793         iwl_send_add_sta(priv, &priv->stations[sta_id].sta, CMD_ASYNC);
 794
 795         spin_unlock_irqrestore(&priv->sta_lock, flags);
 796
 797 }
 798 EXPORT_SYMBOL(iwl_update_tkip_key);
 799
 800 int iwl_remove_dynamic_key(struct iwl_priv *priv,
 801                                 struct ieee80211_key_conf *keyconf,
 802                                 u8 sta_id)
 803 {
 804         unsigned long flags;
 805         int ret = 0;
 806         u16 key_flags;
 807         u8 keyidx;
 808
 809         priv->key_mapping_key--;
 810
 811         spin_lock_irqsave(&priv->sta_lock, flags);
 812         key_flags = le16_to_cpu(priv->stations[sta_id].sta.key.key_flags);
 813         keyidx = (key_flags >> STA_KEY_FLG_KEYID_POS) & 0x3;
 814
 815         IWL_DEBUG_WEP(priv, "Remove dynamic key: idx=%d sta=%d\n",
 816                       keyconf->keyidx, sta_id);
 817
 818         if (keyconf->keyidx != keyidx) {
 819                 /* We need to remove a key with index different that the one
 820                  * in the uCode. This means that the key we need to remove has
 821                  * been replaced by another one with different index.
 822                  * Don't do anything and return ok
 823                  */
 824                 spin_unlock_irqrestore(&priv->sta_lock, flags);
 825                 return 0;
 826         }
 827
 828         if (priv->stations[sta_id].sta.key.key_offset == WEP_INVALID_OFFSET) {
 829                 IWL_WARN(priv, "Removing wrong key %d 0x%x\n",
 830                             keyconf->keyidx, key_flags);
 831                 spin_unlock_irqrestore(&priv->sta_lock, flags);
 832                 return 0;
 833         }
 834
 835         if (!test_and_clear_bit(priv->stations[sta_id].sta.key.key_offset,
 836                 &priv->ucode_key_table))
 837                 IWL_ERR(priv, "index %d not used in uCode key table.\n",
 838                         priv->stations[sta_id].sta.key.key_offset);
 839         memset(&priv->stations[sta_id].keyinfo, 0,
 840                                         sizeof(struct iwl_hw_key));
 841         memset(&priv->stations[sta_id].sta.key, 0,
 842                                         sizeof(struct iwl4965_keyinfo));
 843         priv->stations[sta_id].sta.key.key_flags =
 844                         STA_KEY_FLG_NO_ENC | STA_KEY_FLG_INVALID;
 845         priv->stations[sta_id].sta.key.key_offset = WEP_INVALID_OFFSET;
 846         priv->stations[sta_id].sta.sta.modify_mask = STA_MODIFY_KEY_MASK;
 847         priv->stations[sta_id].sta.mode = STA_CONTROL_MODIFY_MSK;
 848
 849         if (iwl_is_rfkill(priv)) {
 850                 IWL_DEBUG_WEP(priv, "Not sending REPLY_ADD_STA command because RFKILL enabled. \n");
 851                 spin_unlock_irqrestore(&priv->sta_lock, flags);
 852                 return 0;
 853         }
 854         ret =  iwl_send_add_sta(priv, &priv->stations[sta_id].sta, CMD_ASYNC);
 855         spin_unlock_irqrestore(&priv->sta_lock, flags);
 856         return ret;
 857 }
 858 EXPORT_SYMBOL(iwl_remove_dynamic_key);
 859
 860 int iwl_set_dynamic_key(struct iwl_priv *priv,
 861                                 struct ieee80211_key_conf *keyconf, u8 sta_id)
 862 {
 863         int ret;
 864
 865         priv->key_mapping_key++;
 866         keyconf->hw_key_idx = HW_KEY_DYNAMIC;
 867
 868         switch (keyconf->alg) {
 869         case ALG_CCMP:
 870                 ret = iwl_set_ccmp_dynamic_key_info(priv, keyconf, sta_id);
 871                 break;
 872         case ALG_TKIP:
 873                 ret = iwl_set_tkip_dynamic_key_info(priv, keyconf, sta_id);
 874                 break;
 875         case ALG_WEP:
 876                 ret = iwl_set_wep_dynamic_key_info(priv, keyconf, sta_id);
 877                 break;
 878         default:
 879                 IWL_ERR(priv,
 880                         "Unknown alg: %s alg = %d\n", __func__, keyconf->alg);
 881                 ret = -EINVAL;
 882         }
 883
 884         IWL_DEBUG_WEP(priv, "Set dynamic key: alg= %d len=%d idx=%d sta=%d ret=%d\n",
 885                       keyconf->alg, keyconf->keylen, keyconf->keyidx,
 886                       sta_id, ret);
 887
 888         return ret;
 889 }
 890 EXPORT_SYMBOL(iwl_set_dynamic_key);
 891
 892 #ifdef CONFIG_IWLWIFI_DEBUG
 893 static void iwl_dump_lq_cmd(struct iwl_priv *priv,
 894                            struct iwl_link_quality_cmd *lq)
 895 {
 896         int i;
 897         IWL_DEBUG_RATE(priv, "lq station id 0x%x\n", lq->sta_id);
 898         IWL_DEBUG_RATE(priv, "lq ant 0x%X 0x%X\n",
 899                        lq->general_params.single_stream_ant_msk,
 900                        lq->general_params.dual_stream_ant_msk);
 901
 902         for (i = 0; i < LINK_QUAL_MAX_RETRY_NUM; i++)
 903                 IWL_DEBUG_RATE(priv, "lq index %d 0x%X\n",
 904                                i, lq->rs_table[i].rate_n_flags);
 905 }
 906 #else
 907 static inline void iwl_dump_lq_cmd(struct iwl_priv *priv,
 908                                    struct iwl_link_quality_cmd *lq)
 909 {
 910 }
 911 #endif
 912
 913 int iwl_send_lq_cmd(struct iwl_priv *priv,
 914                     struct iwl_link_quality_cmd *lq, u8 flags)
 915 {
 916         struct iwl_host_cmd cmd = {
 917                 .id = REPLY_TX_LINK_QUALITY_CMD,
 918                 .len = sizeof(struct iwl_link_quality_cmd),
 919                 .flags = flags,
 920                 .data = lq,
 921         };
 922
 923         if ((lq->sta_id == 0xFF) &&
 924             (priv->iw_mode == NL80211_IFTYPE_ADHOC))
 925                 return -EINVAL;
 926
 927         if (lq->sta_id == 0xFF)
 928                 lq->sta_id = IWL_AP_ID;
 929
 930         iwl_dump_lq_cmd(priv, lq);
 931
 932         if (iwl_is_associated(priv) && priv->assoc_station_added)
 933                 return  iwl_send_cmd(priv, &cmd);
 934
 935         return 0;
 936 }
 937 EXPORT_SYMBOL(iwl_send_lq_cmd);
 938
 939 /**
 940  * iwl_sta_init_lq - Initialize a station's hardware rate table
 941  *
 942  * The uCode's station table contains a table of fallback rates
 943  * for automatic fallback during transmission.
 944  *
 945  * NOTE: This sets up a default set of values.  These will be replaced later
 946  *       if the driver's iwl-agn-rs rate scaling algorithm is used, instead of
 947  *       rc80211_simple.
 948  *
 949  * NOTE: Run REPLY_ADD_STA command to set up station table entry, before
 950  *       calling this function (which runs REPLY_TX_LINK_QUALITY_CMD,
 951  *       which requires station table entry to exist).
 952  */
 953 static void iwl_sta_init_lq(struct iwl_priv *priv, const u8 *addr, bool is_ap)
 954 {
 955         int i, r;
 956         struct iwl_link_quality_cmd link_cmd = {
 957                 .reserved1 = 0,
 958         };
 959         u32 rate_flags;
 960
 961         /* Set up the rate scaling to start at selected rate, fall back
 962          * all the way down to 1M in IEEE order, and then spin on 1M */
 963         if (is_ap)
 964                 r = IWL_RATE_54M_INDEX;
 965         else if (priv->band == IEEE80211_BAND_5GHZ)
 966                 r = IWL_RATE_6M_INDEX;
 967         else
 968                 r = IWL_RATE_1M_INDEX;
 969
 970         for (i = 0; i < LINK_QUAL_MAX_RETRY_NUM; i++) {
 971                 rate_flags = 0;
 972                 if (r >= IWL_FIRST_CCK_RATE && r <= IWL_LAST_CCK_RATE)
 973                         rate_flags |= RATE_MCS_CCK_MSK;
 974
 975                 rate_flags |= first_antenna(priv->hw_params.valid_tx_ant) <<
 976                                 RATE_MCS_ANT_POS;
 977
 978                 link_cmd.rs_table[i].rate_n_flags =
 979                         iwl_hw_set_rate_n_flags(iwl_rates[r].plcp, rate_flags);
 980                 r = iwl_get_prev_ieee_rate(r);
 981         }
 982
 983         link_cmd.general_params.single_stream_ant_msk =
 984                                 first_antenna(priv->hw_params.valid_tx_ant);
 985         link_cmd.general_params.dual_stream_ant_msk = 3;
 986         link_cmd.agg_params.agg_dis_start_th = LINK_QUAL_AGG_DISABLE_START_DEF;
 987         link_cmd.agg_params.agg_time_limit =
 988                 cpu_to_le16(LINK_QUAL_AGG_TIME_LIMIT_DEF);
 989
 990         /* Update the rate scaling for control frame Tx to AP */
 991         link_cmd.sta_id = is_ap ? IWL_AP_ID : priv->hw_params.bcast_sta_id;
 992
 993         iwl_send_cmd_pdu_async(priv, REPLY_TX_LINK_QUALITY_CMD,
 994                                sizeof(link_cmd), &link_cmd, NULL);
 995 }
 996
 997 /**
 998  * iwl_rxon_add_station - add station into station table.
 999  *
1000  * there is only one AP station with id= IWL_AP_ID
1001  * NOTE: mutex must be held before calling this function
1002  */
1003 int iwl_rxon_add_station(struct iwl_priv *priv, const u8 *addr, bool is_ap)
1004 {
1005         struct ieee80211_sta *sta;
1006         struct ieee80211_sta_ht_cap ht_config;
1007         struct ieee80211_sta_ht_cap *cur_ht_config = NULL;
1008         u8 sta_id;
1009
1010         /* Add station to device's station table */
1011
1012         /*
1013          * XXX: This check is definitely not correct, if we're an AP
1014          *      it'll always be false which is not what we want, but
1015          *      it doesn't look like iwlagn is prepared to be an HT
1016          *      AP anyway.
1017          */
1018         if (priv->current_ht_config.is_ht) {
1019                 rcu_read_lock();
1020                 sta = ieee80211_find_sta(priv->vif, addr);
1021                 if (sta) {
1022                         memcpy(&ht_config, &sta->ht_cap, sizeof(ht_config));
1023                         cur_ht_config = &ht_config;
1024                 }
1025                 rcu_read_unlock();
1026         }
1027
1028         sta_id = iwl_add_station(priv, addr, is_ap, CMD_SYNC, cur_ht_config);
1029
1030         /* Set up default rate scaling table in device's station table */
1031         iwl_sta_init_lq(priv, addr, is_ap);
1032
1033         return sta_id;
1034 }
1035 EXPORT_SYMBOL(iwl_rxon_add_station);
1036
1037 /**
1038  * iwl_sta_init_bcast_lq - Initialize a bcast station's hardware rate table
1039  *
1040  * NOTE: Run REPLY_ADD_STA command to set up station table entry, before
1041  *       calling this function (which runs REPLY_TX_LINK_QUALITY_CMD,
1042  *       which requires station table entry to exist).
1043  */
1044 static void iwl_sta_init_bcast_lq(struct iwl_priv *priv)
1045 {
1046         int i, r;
1047         struct iwl_link_quality_cmd link_cmd = {
1048                 .reserved1 = 0,
1049         };
1050         u32 rate_flags;
1051
1052         /* Set up the rate scaling to start at selected rate, fall back
1053          * all the way down to 1M in IEEE order, and then spin on 1M */
1054         if (priv->band == IEEE80211_BAND_5GHZ)
1055                 r = IWL_RATE_6M_INDEX;
1056         else
1057                 r = IWL_RATE_1M_INDEX;
1058
1059         for (i = 0; i < LINK_QUAL_MAX_RETRY_NUM; i++) {
1060                 rate_flags = 0;
1061                 if (r >= IWL_FIRST_CCK_RATE && r <= IWL_LAST_CCK_RATE)
1062                         rate_flags |= RATE_MCS_CCK_MSK;
1063
1064                 rate_flags |= first_antenna(priv->hw_params.valid_tx_ant) <<
1065                                 RATE_MCS_ANT_POS;
1066
1067                 link_cmd.rs_table[i].rate_n_flags =
1068                         iwl_hw_set_rate_n_flags(iwl_rates[r].plcp, rate_flags);
1069                 r = iwl_get_prev_ieee_rate(r);
1070         }
1071
1072         link_cmd.general_params.single_stream_ant_msk =
1073                                 first_antenna(priv->hw_params.valid_tx_ant);
1074         link_cmd.general_params.dual_stream_ant_msk = 3;
1075         link_cmd.agg_params.agg_dis_start_th = LINK_QUAL_AGG_DISABLE_START_DEF;
1076         link_cmd.agg_params.agg_time_limit =
1077                 cpu_to_le16(LINK_QUAL_AGG_TIME_LIMIT_DEF);
1078
1079         /* Update the rate scaling for control frame Tx to AP */
1080         link_cmd.sta_id = priv->hw_params.bcast_sta_id;
1081
1082         iwl_send_cmd_pdu_async(priv, REPLY_TX_LINK_QUALITY_CMD,
1083                                sizeof(link_cmd), &link_cmd, NULL);
1084 }
1085
1086
1087 /**
1088  * iwl_add_bcast_station - add broadcast station into station table.
1089  */
1090 void iwl_add_bcast_station(struct iwl_priv *priv)
1091 {
1092         iwl_add_station(priv, iwl_bcast_addr, false, CMD_SYNC, NULL);
1093
1094         /* Set up default rate scaling table in device's station table */
1095         iwl_sta_init_bcast_lq(priv);
1096 }
1097 EXPORT_SYMBOL(iwl_add_bcast_station);
1098
1099 /**
1100  * iwl_get_sta_id - Find station's index within station table
1101  *
1102  * If new IBSS station, create new entry in station table
1103  */
1104 int iwl_get_sta_id(struct iwl_priv *priv, struct ieee80211_hdr *hdr)
1105 {
1106         int sta_id;
1107         __le16 fc = hdr->frame_control;
1108
1109         /* If this frame is broadcast or management, use broadcast station id */
1110         if (!ieee80211_is_data(fc) ||  is_multicast_ether_addr(hdr->addr1))
1111                 return priv->hw_params.bcast_sta_id;
1112
1113         switch (priv->iw_mode) {
1114
1115         /* If we are a client station in a BSS network, use the special
1116          * AP station entry (that's the only station we communicate with) */
1117         case NL80211_IFTYPE_STATION:
1118                 return IWL_AP_ID;
1119
1120         /* If we are an AP, then find the station, or use BCAST */
1121         case NL80211_IFTYPE_AP:
1122                 sta_id = iwl_find_station(priv, hdr->addr1);
1123                 if (sta_id != IWL_INVALID_STATION)
1124                         return sta_id;
1125                 return priv->hw_params.bcast_sta_id;
1126
1127         /* If this frame is going out to an IBSS network, find the station,
1128          * or create a new station table entry */
1129         case NL80211_IFTYPE_ADHOC:
1130                 sta_id = iwl_find_station(priv, hdr->addr1);
1131                 if (sta_id != IWL_INVALID_STATION)
1132                         return sta_id;
1133
1134                 /* Create new station table entry */
1135                 sta_id = iwl_add_station(priv, hdr->addr1, false,
1136                                         CMD_ASYNC, NULL);
1137
1138                 if (sta_id != IWL_INVALID_STATION)
1139                         return sta_id;
1140
1141                 IWL_DEBUG_DROP(priv, "Station %pM not in station map. "
1142                                "Defaulting to broadcast...\n",
1143                                hdr->addr1);
1144                 iwl_print_hex_dump(priv, IWL_DL_DROP, (u8 *) hdr, sizeof(*hdr));
1145                 return priv->hw_params.bcast_sta_id;
1146
1147         default:
1148                 IWL_WARN(priv, "Unknown mode of operation: %d\n",
1149                         priv->iw_mode);
1150                 return priv->hw_params.bcast_sta_id;
1151         }
1152 }
1153 EXPORT_SYMBOL(iwl_get_sta_id);
1154
1155 /**
1156  * iwl_sta_tx_modify_enable_tid - Enable Tx for this TID in station table
1157  */
1158 void iwl_sta_tx_modify_enable_tid(struct iwl_priv *priv, int sta_id, int tid)
1159 {
1160         unsigned long flags;
1161
1162         /* Remove "disable" flag, to enable Tx for this TID */
1163         spin_lock_irqsave(&priv->sta_lock, flags);
1164         priv->stations[sta_id].sta.sta.modify_mask = STA_MODIFY_TID_DISABLE_TX;
1165         priv->stations[sta_id].sta.tid_disable_tx &= cpu_to_le16(~(1 << tid));
1166         priv->stations[sta_id].sta.mode = STA_CONTROL_MODIFY_MSK;
1167         spin_unlock_irqrestore(&priv->sta_lock, flags);
1168
1169         iwl_send_add_sta(priv, &priv->stations[sta_id].sta, CMD_ASYNC);
1170 }
1171 EXPORT_SYMBOL(iwl_sta_tx_modify_enable_tid);
1172
1173 int iwl_sta_rx_agg_start(struct iwl_priv *priv,
1174                          const u8 *addr, int tid, u16 ssn)
1175 {
1176         unsigned long flags;
1177         int sta_id;
1178
1179         sta_id = iwl_find_station(priv, addr);
1180         if (sta_id == IWL_INVALID_STATION)
1181                 return -ENXIO;
1182
1183         spin_lock_irqsave(&priv->sta_lock, flags);
1184         priv->stations[sta_id].sta.station_flags_msk = 0;
1185         priv->stations[sta_id].sta.sta.modify_mask = STA_MODIFY_ADDBA_TID_MSK;
1186         priv->stations[sta_id].sta.add_immediate_ba_tid = (u8)tid;
1187         priv->stations[sta_id].sta.add_immediate_ba_ssn = cpu_to_le16(ssn);
1188         priv->stations[sta_id].sta.mode = STA_CONTROL_MODIFY_MSK;
1189         spin_unlock_irqrestore(&priv->sta_lock, flags);
1190
1191         return iwl_send_add_sta(priv, &priv->stations[sta_id].sta,
1192                                         CMD_ASYNC);
1193 }
1194 EXPORT_SYMBOL(iwl_sta_rx_agg_start);
1195
1196 int iwl_sta_rx_agg_stop(struct iwl_priv *priv, const u8 *addr, int tid)
1197 {
1198         unsigned long flags;
1199         int sta_id;
1200
1201         sta_id = iwl_find_station(priv, addr);
1202         if (sta_id == IWL_INVALID_STATION) {
1203                 IWL_ERR(priv, "Invalid station for AGG tid %d\n", tid);
1204                 return -ENXIO;
1205         }
1206
1207         spin_lock_irqsave(&priv->sta_lock, flags);
1208         priv->stations[sta_id].sta.station_flags_msk = 0;
1209         priv->stations[sta_id].sta.sta.modify_mask = STA_MODIFY_DELBA_TID_MSK;
1210         priv->stations[sta_id].sta.remove_immediate_ba_tid = (u8)tid;
1211         priv->stations[sta_id].sta.mode = STA_CONTROL_MODIFY_MSK;
1212         spin_unlock_irqrestore(&priv->sta_lock, flags);
1213
1214         return iwl_send_add_sta(priv, &priv->stations[sta_id].sta,
1215                                         CMD_ASYNC);
1216 }
1217 EXPORT_SYMBOL(iwl_sta_rx_agg_stop);
1218
1219 static void iwl_sta_modify_ps_wake(struct iwl_priv *priv, int sta_id)
1220 {
1221         unsigned long flags;
1222
1223         spin_lock_irqsave(&priv->sta_lock, flags);
1224         priv->stations[sta_id].sta.station_flags &= ~STA_FLG_PWR_SAVE_MSK;
1225         priv->stations[sta_id].sta.station_flags_msk = STA_FLG_PWR_SAVE_MSK;
1226         priv->stations[sta_id].sta.sta.modify_mask = 0;
1227         priv->stations[sta_id].sta.mode = STA_CONTROL_MODIFY_MSK;
1228         spin_unlock_irqrestore(&priv->sta_lock, flags);
1229
1230         iwl_send_add_sta(priv, &priv->stations[sta_id].sta, CMD_ASYNC);
1231 }
1232
1233 void iwl_update_ps_mode(struct iwl_priv *priv, u16 ps_bit, u8 *addr)
1234 {
1235         /* FIXME: need locking over ps_status ??? */
1236         u8 sta_id = iwl_find_station(priv, addr);
1237
1238         if (sta_id != IWL_INVALID_STATION) {
1239                 u8 sta_awake = priv->stations[sta_id].
1240                                 ps_status == STA_PS_STATUS_WAKE;
1241
1242                 if (sta_awake && ps_bit)
1243                         priv->stations[sta_id].ps_status = STA_PS_STATUS_SLEEP;
1244                 else if (!sta_awake && !ps_bit) {
1245                         iwl_sta_modify_ps_wake(priv, sta_id);
1246                         priv->stations[sta_id].ps_status = STA_PS_STATUS_WAKE;
1247                 }
1248         }
1249 }
1250