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

   1 /******************************************************************************
   2  *
   3  * Copyright(c) 2003 - 2009 Intel Corporation. All rights reserved.
   4  *
   5  * Portions of this file are derived from the ipw3945 project, as well
   6  * as portions of the ieee80211 subsystem header files.
   7  *
   8  * This program is free software; you can redistribute it and/or modify it
   9  * under the terms of version 2 of the GNU General Public License as
  10  * published by the Free Software Foundation.
  11  *
  12  * This program is distributed in the hope that it will be useful, but WITHOUT
  13  * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
  14  * FITNESS FOR A PARTICULAR PURPOSE.  See the GNU General Public License for
  15  * more details.
  16  *
  17  * You should have received a copy of the GNU General Public License along with
  18  * this program; if not, write to the Free Software Foundation, Inc.,
  19  * 51 Franklin Street, Fifth Floor, Boston, MA 02110, USA
  20  *
  21  * The full GNU General Public License is included in this distribution in the
  22  * file called LICENSE.
  23  *
  24  * Contact Information:
  25  *  Intel Linux Wireless <ilw@linux.intel.com>
  26  * Intel Corporation, 5200 N.E. Elam Young Parkway, Hillsboro, OR 97124-6497
  27  *
  28  *****************************************************************************/
  29
  30 #include <net/mac80211.h>
  31 #include <linux/etherdevice.h>
  32
  33 #include "iwl-dev.h"
  34 #include "iwl-core.h"
  35 #include "iwl-sta.h"
  36
  37 #define IWL_STA_DRIVER_ACTIVE BIT(0) /* driver entry is active */
  38 #define IWL_STA_UCODE_ACTIVE  BIT(1) /* ucode entry is active */
  39
  40 u8 iwl_find_station(struct iwl_priv *priv, const u8 *addr)
  41 {
  42         int i;
  43         int start = 0;
  44         int ret = IWL_INVALID_STATION;
  45         unsigned long flags;
  46
  47         if ((priv->iw_mode == NL80211_IFTYPE_ADHOC) ||
  48             (priv->iw_mode == NL80211_IFTYPE_AP))
  49                 start = IWL_STA_ID;
  50
  51         if (is_broadcast_ether_addr(addr))
  52                 return priv->hw_params.bcast_sta_id;
  53
  54         spin_lock_irqsave(&priv->sta_lock, flags);
  55         for (i = start; i < priv->hw_params.max_stations; i++)
  56                 if (priv->stations[i].used &&
  57                     (!compare_ether_addr(priv->stations[i].sta.sta.addr,
  58                                          addr))) {
  59                         ret = i;
  60                         goto out;
  61                 }
  62
  63         IWL_DEBUG_ASSOC_LIMIT(priv, "can not find STA %pM total %d\n",
  64                               addr, priv->num_stations);
  65
  66  out:
  67         spin_unlock_irqrestore(&priv->sta_lock, flags);
  68         return ret;
  69 }
  70 EXPORT_SYMBOL(iwl_find_station);
  71
  72 int iwl_get_ra_sta_id(struct iwl_priv *priv, struct ieee80211_hdr *hdr)
  73 {
  74         if (priv->iw_mode == NL80211_IFTYPE_STATION) {
  75                 return IWL_AP_ID;
  76         } else {
  77                 u8 *da = ieee80211_get_DA(hdr);
  78                 return iwl_find_station(priv, da);
  79         }
  80 }
  81 EXPORT_SYMBOL(iwl_get_ra_sta_id);
  82
  83 static void iwl_sta_ucode_activate(struct iwl_priv *priv, u8 sta_id)
  84 {
  85         unsigned long flags;
  86
  87         spin_lock_irqsave(&priv->sta_lock, flags);
  88
  89         if (!(priv->stations[sta_id].used & IWL_STA_DRIVER_ACTIVE))
  90                 IWL_ERR(priv, "ACTIVATE a non DRIVER active station %d\n",
  91                         sta_id);
  92
  93         priv->stations[sta_id].used |= IWL_STA_UCODE_ACTIVE;
  94         IWL_DEBUG_ASSOC(priv, "Added STA to Ucode: %pM\n",
  95                         priv->stations[sta_id].sta.sta.addr);
  96
  97         spin_unlock_irqrestore(&priv->sta_lock, flags);
  98 }
  99
 100 static int iwl_add_sta_callback(struct iwl_priv *priv,
 101                                    struct iwl_cmd *cmd, struct sk_buff *skb)
 102 {
 103         struct iwl_rx_packet *res = NULL;
 104         struct iwl_addsta_cmd *addsta =
 105                 (struct iwl_addsta_cmd *)cmd->cmd.payload;
 106         u8 sta_id = addsta->sta.sta_id;
 107
 108         if (!skb) {
 109                 IWL_ERR(priv, "Error: Response NULL in REPLY_ADD_STA.\n");
 110                 return 1;
 111         }
 112
 113         res = (struct iwl_rx_packet *)skb->data;
 114         if (res->hdr.flags & IWL_CMD_FAILED_MSK) {
 115                 IWL_ERR(priv, "Bad return from REPLY_ADD_STA (0x%08X)\n",
 116                           res->hdr.flags);
 117                 return 1;
 118         }
 119
 120         switch (res->u.add_sta.status) {
 121         case ADD_STA_SUCCESS_MSK:
 122                 iwl_sta_ucode_activate(priv, sta_id);
 123                  /* fall through */
 124         default:
 125                 IWL_DEBUG_HC(priv, "Received REPLY_ADD_STA:(0x%08X)\n",
 126                              res->u.add_sta.status);
 127                 break;
 128         }
 129
 130         /* We didn't cache the SKB; let the caller free it */
 131         return 1;
 132 }
 133
 134 int iwl_send_add_sta(struct iwl_priv *priv,
 135                      struct iwl_addsta_cmd *sta, u8 flags)
 136 {
 137         struct iwl_rx_packet *res = NULL;
 138         int ret = 0;
 139         u8 data[sizeof(*sta)];
 140         struct iwl_host_cmd cmd = {
 141                 .id = REPLY_ADD_STA,
 142                 .meta.flags = flags,
 143                 .data = data,
 144         };
 145
 146         if (flags & CMD_ASYNC)
 147                 cmd.meta.u.callback = iwl_add_sta_callback;
 148         else
 149                 cmd.meta.flags |= CMD_WANT_SKB;
 150
 151         cmd.len = priv->cfg->ops->utils->build_addsta_hcmd(sta, data);
 152         ret = iwl_send_cmd(priv, &cmd);
 153
 154         if (ret || (flags & CMD_ASYNC))
 155                 return ret;
 156
 157         res = (struct iwl_rx_packet *)cmd.meta.u.skb->data;
 158         if (res->hdr.flags & IWL_CMD_FAILED_MSK) {
 159                 IWL_ERR(priv, "Bad return from REPLY_ADD_STA (0x%08X)\n",
 160                           res->hdr.flags);
 161                 ret = -EIO;
 162         }
 163
 164         if (ret == 0) {
 165                 switch (res->u.add_sta.status) {
 166                 case ADD_STA_SUCCESS_MSK:
 167                         iwl_sta_ucode_activate(priv, sta->sta.sta_id);
 168                         IWL_DEBUG_INFO(priv, "REPLY_ADD_STA PASSED\n");
 169                         break;
 170                 default:
 171                         ret = -EIO;
 172                         IWL_WARN(priv, "REPLY_ADD_STA failed\n");
 173                         break;
 174                 }
 175         }
 176
 177         priv->alloc_rxb_skb--;
 178         dev_kfree_skb_any(cmd.meta.u.skb);
 179
 180         return ret;
 181 }
 182 EXPORT_SYMBOL(iwl_send_add_sta);
 183
 184 static void iwl_set_ht_add_station(struct iwl_priv *priv, u8 index,
 185                                    struct ieee80211_sta_ht_cap *sta_ht_inf)
 186 {
 187         __le32 sta_flags;
 188         u8 mimo_ps_mode;
 189
 190         if (!sta_ht_inf || !sta_ht_inf->ht_supported)
 191                 goto done;
 192
 193         mimo_ps_mode = (sta_ht_inf->cap & IEEE80211_HT_CAP_SM_PS) >> 2;
 194
 195         sta_flags = priv->stations[index].sta.station_flags;
 196
 197         sta_flags &= ~(STA_FLG_RTS_MIMO_PROT_MSK | STA_FLG_MIMO_DIS_MSK);
 198
 199         switch (mimo_ps_mode) {
 200         case WLAN_HT_CAP_SM_PS_STATIC:
 201                 sta_flags |= STA_FLG_MIMO_DIS_MSK;
 202                 break;
 203         case WLAN_HT_CAP_SM_PS_DYNAMIC:
 204                 sta_flags |= STA_FLG_RTS_MIMO_PROT_MSK;
 205                 break;
 206         case WLAN_HT_CAP_SM_PS_DISABLED:
 207                 break;
 208         default:
 209                 IWL_WARN(priv, "Invalid MIMO PS mode %d\n", mimo_ps_mode);
 210                 break;
 211         }
 212
 213         sta_flags |= cpu_to_le32(
 214               (u32)sta_ht_inf->ampdu_factor << STA_FLG_MAX_AGG_SIZE_POS);
 215
 216         sta_flags |= cpu_to_le32(
 217               (u32)sta_ht_inf->ampdu_density << STA_FLG_AGG_MPDU_DENSITY_POS);
 218
 219         if (iwl_is_fat_tx_allowed(priv, sta_ht_inf))
 220                 sta_flags |= STA_FLG_FAT_EN_MSK;
 221         else
 222                 sta_flags &= ~STA_FLG_FAT_EN_MSK;
 223
 224         priv->stations[index].sta.station_flags = sta_flags;
 225  done:
 226         return;
 227 }
 228
 229 /**
 230  * iwl_add_station - Add station to tables in driver and device
 231  */
 232 u8 iwl_add_station(struct iwl_priv *priv, const u8 *addr, bool is_ap, u8 flags,
 233                 struct ieee80211_sta_ht_cap *ht_info)
 234 {
 235         struct iwl_station_entry *station;
 236         unsigned long flags_spin;
 237         int i;
 238         int sta_id = IWL_INVALID_STATION;
 239         u16 rate;
 240
 241         spin_lock_irqsave(&priv->sta_lock, flags_spin);
 242         if (is_ap)
 243                 sta_id = IWL_AP_ID;
 244         else if (is_broadcast_ether_addr(addr))
 245                 sta_id = priv->hw_params.bcast_sta_id;
 246         else
 247                 for (i = IWL_STA_ID; i < priv->hw_params.max_stations; i++) {
 248                         if (!compare_ether_addr(priv->stations[i].sta.sta.addr,
 249                                                 addr)) {
 250                                 sta_id = i;
 251                                 break;
 252                         }
 253
 254                         if (!priv->stations[i].used &&
 255                             sta_id == IWL_INVALID_STATION)
 256                                 sta_id = i;
 257                 }
 258
 259         /* These two conditions have the same outcome, but keep them separate
 260            since they have different meanings */
 261         if (unlikely(sta_id == IWL_INVALID_STATION)) {
 262                 spin_unlock_irqrestore(&priv->sta_lock, flags_spin);
 263                 return sta_id;
 264         }
 265
 266         if (priv->stations[sta_id].used &&
 267             !compare_ether_addr(priv->stations[sta_id].sta.sta.addr, addr)) {
 268                 spin_unlock_irqrestore(&priv->sta_lock, flags_spin);
 269                 return sta_id;
 270         }
 271
 272
 273         station = &priv->stations[sta_id];
 274         station->used = IWL_STA_DRIVER_ACTIVE;
 275         IWL_DEBUG_ASSOC(priv, "Add STA to driver ID %d: %pM\n",
 276                         sta_id, addr);
 277         priv->num_stations++;
 278
 279         /* Set up the REPLY_ADD_STA command to send to device */
 280         memset(&station->sta, 0, sizeof(struct iwl_addsta_cmd));
 281         memcpy(station->sta.sta.addr, addr, ETH_ALEN);
 282         station->sta.mode = 0;
 283         station->sta.sta.sta_id = sta_id;
 284         station->sta.station_flags = 0;
 285
 286         /* BCAST station and IBSS stations do not work in HT mode */
 287         if (sta_id != priv->hw_params.bcast_sta_id &&
 288             priv->iw_mode != NL80211_IFTYPE_ADHOC)
 289                 iwl_set_ht_add_station(priv, sta_id, ht_info);
 290
 291         /* 3945 only */
 292         rate = (priv->band == IEEE80211_BAND_5GHZ) ?
 293                 IWL_RATE_6M_PLCP : IWL_RATE_1M_PLCP;
 294         /* Turn on both antennas for the station... */
 295         station->sta.rate_n_flags = cpu_to_le16(rate | RATE_MCS_ANT_AB_MSK);
 296
 297         spin_unlock_irqrestore(&priv->sta_lock, flags_spin);
 298
 299         /* Add station to device's station table */
 300         iwl_send_add_sta(priv, &station->sta, flags);
 301         return sta_id;
 302
 303 }
 304 EXPORT_SYMBOL(iwl_add_station);
 305
 306 static void iwl_sta_ucode_deactivate(struct iwl_priv *priv, const char *addr)
 307 {
 308         unsigned long flags;
 309         u8 sta_id = iwl_find_station(priv, addr);
 310
 311         BUG_ON(sta_id == IWL_INVALID_STATION);
 312
 313         IWL_DEBUG_ASSOC(priv, "Removed STA from Ucode: %pM\n", addr);
 314
 315         spin_lock_irqsave(&priv->sta_lock, flags);
 316
 317         /* Ucode must be active and driver must be non active */
 318         if (priv->stations[sta_id].used != IWL_STA_UCODE_ACTIVE)
 319                 IWL_ERR(priv, "removed non active STA %d\n", sta_id);
 320
 321         priv->stations[sta_id].used &= ~IWL_STA_UCODE_ACTIVE;
 322
 323         memset(&priv->stations[sta_id], 0, sizeof(struct iwl_station_entry));
 324         spin_unlock_irqrestore(&priv->sta_lock, flags);
 325 }
 326
 327 static int iwl_remove_sta_callback(struct iwl_priv *priv,
 328                                    struct iwl_cmd *cmd, struct sk_buff *skb)
 329 {
 330         struct iwl_rx_packet *res = NULL;
 331         struct iwl_rem_sta_cmd *rm_sta =
 332                  (struct iwl_rem_sta_cmd *)cmd->cmd.payload;
 333         const char *addr = rm_sta->addr;
 334
 335         if (!skb) {
 336                 IWL_ERR(priv, "Error: Response NULL in REPLY_REMOVE_STA.\n");
 337                 return 1;
 338         }
 339
 340         res = (struct iwl_rx_packet *)skb->data;
 341         if (res->hdr.flags & IWL_CMD_FAILED_MSK) {
 342                 IWL_ERR(priv, "Bad return from REPLY_REMOVE_STA (0x%08X)\n",
 343                 res->hdr.flags);
 344                 return 1;
 345         }
 346
 347         switch (res->u.rem_sta.status) {
 348         case REM_STA_SUCCESS_MSK:
 349                 iwl_sta_ucode_deactivate(priv, addr);
 350                 break;
 351         default:
 352                 IWL_ERR(priv, "REPLY_REMOVE_STA failed\n");
 353                 break;
 354         }
 355
 356         /* We didn't cache the SKB; let the caller free it */
 357         return 1;
 358 }
 359
 360 static int iwl_send_remove_station(struct iwl_priv *priv, const u8 *addr,
 361                                    u8 flags)
 362 {
 363         struct iwl_rx_packet *res = NULL;
 364         int ret;
 365
 366         struct iwl_rem_sta_cmd rm_sta_cmd;
 367
 368         struct iwl_host_cmd cmd = {
 369                 .id = REPLY_REMOVE_STA,
 370                 .len = sizeof(struct iwl_rem_sta_cmd),
 371                 .meta.flags = flags,
 372                 .data = &rm_sta_cmd,
 373         };
 374
 375         memset(&rm_sta_cmd, 0, sizeof(rm_sta_cmd));
 376         rm_sta_cmd.num_sta = 1;
 377         memcpy(&rm_sta_cmd.addr, addr , ETH_ALEN);
 378
 379         if (flags & CMD_ASYNC)
 380                 cmd.meta.u.callback = iwl_remove_sta_callback;
 381         else
 382                 cmd.meta.flags |= CMD_WANT_SKB;
 383         ret = iwl_send_cmd(priv, &cmd);
 384
 385         if (ret || (flags & CMD_ASYNC))
 386                 return ret;
 387
 388         res = (struct iwl_rx_packet *)cmd.meta.u.skb->data;
 389         if (res->hdr.flags & IWL_CMD_FAILED_MSK) {
 390                 IWL_ERR(priv, "Bad return from REPLY_REMOVE_STA (0x%08X)\n",
 391                           res->hdr.flags);
 392                 ret = -EIO;
 393         }
 394
 395         if (!ret) {
 396                 switch (res->u.rem_sta.status) {
 397                 case REM_STA_SUCCESS_MSK:
 398                         iwl_sta_ucode_deactivate(priv, addr);
 399                         IWL_DEBUG_ASSOC(priv, "REPLY_REMOVE_STA PASSED\n");
 400                         break;
 401                 default:
 402                         ret = -EIO;
 403                         IWL_ERR(priv, "REPLY_REMOVE_STA failed\n");
 404                         break;
 405                 }
 406         }
 407
 408         priv->alloc_rxb_skb--;
 409         dev_kfree_skb_any(cmd.meta.u.skb);
 410
 411         return ret;
 412 }
 413
 414 /**
 415  * iwl_remove_station - Remove driver's knowledge of station.
 416  */
 417 int iwl_remove_station(struct iwl_priv *priv, const u8 *addr, bool is_ap)
 418 {
 419         int sta_id = IWL_INVALID_STATION;
 420         int i, ret = -EINVAL;
 421         unsigned long flags;
 422
 423         spin_lock_irqsave(&priv->sta_lock, flags);
 424
 425         if (is_ap)
 426                 sta_id = IWL_AP_ID;
 427         else if (is_broadcast_ether_addr(addr))
 428                 sta_id = priv->hw_params.bcast_sta_id;
 429         else
 430                 for (i = IWL_STA_ID; i < priv->hw_params.max_stations; i++)
 431                         if (priv->stations[i].used &&
 432                             !compare_ether_addr(priv->stations[i].sta.sta.addr,
 433                                                 addr)) {
 434                                 sta_id = i;
 435                                 break;
 436                         }
 437
 438         if (unlikely(sta_id == IWL_INVALID_STATION))
 439                 goto out;
 440
 441         IWL_DEBUG_ASSOC(priv, "Removing STA from driver:%d  %pM\n",
 442                 sta_id, addr);
 443
 444         if (!(priv->stations[sta_id].used & IWL_STA_DRIVER_ACTIVE)) {
 445                 IWL_ERR(priv, "Removing %pM but non DRIVER active\n",
 446                                 addr);
 447                 goto out;
 448         }
 449
 450         if (!(priv->stations[sta_id].used & IWL_STA_UCODE_ACTIVE)) {
 451                 IWL_ERR(priv, "Removing %pM but non UCODE active\n",
 452                                 addr);
 453                 goto out;
 454         }
 455
 456
 457         priv->stations[sta_id].used &= ~IWL_STA_DRIVER_ACTIVE;
 458
 459         priv->num_stations--;
 460
 461         BUG_ON(priv->num_stations < 0);
 462
 463         spin_unlock_irqrestore(&priv->sta_lock, flags);
 464
 465         ret = iwl_send_remove_station(priv, addr, CMD_ASYNC);
 466         return ret;
 467 out:
 468         spin_unlock_irqrestore(&priv->sta_lock, flags);
 469         return ret;
 470 }
 471 EXPORT_SYMBOL(iwl_remove_station);
 472
 473 /**
 474  * iwl_clear_stations_table - Clear the driver's station table
 475  *
 476  * NOTE:  This does not clear or otherwise alter the device's station table.
 477  */
 478 void iwl_clear_stations_table(struct iwl_priv *priv)
 479 {
 480         unsigned long flags;
 481         int i;
 482
 483         spin_lock_irqsave(&priv->sta_lock, flags);
 484
 485         if (iwl_is_alive(priv) &&
 486            !test_bit(STATUS_EXIT_PENDING, &priv->status) &&
 487            iwl_send_cmd_pdu_async(priv, REPLY_REMOVE_ALL_STA, 0, NULL, NULL))
 488                 IWL_ERR(priv, "Couldn't clear the station table\n");
 489
 490         priv->num_stations = 0;
 491         memset(priv->stations, 0, sizeof(priv->stations));
 492
 493         /* clean ucode key table bit map */
 494         priv->ucode_key_table = 0;
 495
 496         /* keep track of static keys */
 497         for (i = 0; i < WEP_KEYS_MAX ; i++) {
 498                 if (priv->wep_keys[i].key_size)
 499                         set_bit(i, &priv->ucode_key_table);
 500         }
 501
 502         spin_unlock_irqrestore(&priv->sta_lock, flags);
 503 }
 504 EXPORT_SYMBOL(iwl_clear_stations_table);
 505
 506 int iwl_get_free_ucode_key_index(struct iwl_priv *priv)
 507 {
 508         int i;
 509
 510         for (i = 0; i < STA_KEY_MAX_NUM; i++)
 511                 if (!test_and_set_bit(i, &priv->ucode_key_table))
 512                         return i;
 513
 514         return WEP_INVALID_OFFSET;
 515 }
 516 EXPORT_SYMBOL(iwl_get_free_ucode_key_index);
 517
 518 int iwl_send_static_wepkey_cmd(struct iwl_priv *priv, u8 send_if_empty)
 519 {
 520         int i, not_empty = 0;
 521         u8 buff[sizeof(struct iwl_wep_cmd) +
 522                 sizeof(struct iwl_wep_key) * WEP_KEYS_MAX];
 523         struct iwl_wep_cmd *wep_cmd = (struct iwl_wep_cmd *)buff;
 524         size_t cmd_size  = sizeof(struct iwl_wep_cmd);
 525         struct iwl_host_cmd cmd = {
 526                 .id = REPLY_WEPKEY,
 527                 .data = wep_cmd,
 528                 .meta.flags = CMD_ASYNC,
 529         };
 530
 531         memset(wep_cmd, 0, cmd_size +
 532                         (sizeof(struct iwl_wep_key) * WEP_KEYS_MAX));
 533
 534         for (i = 0; i < WEP_KEYS_MAX ; i++) {
 535                 wep_cmd->key[i].key_index = i;
 536                 if (priv->wep_keys[i].key_size) {
 537                         wep_cmd->key[i].key_offset = i;
 538                         not_empty = 1;
 539                 } else {
 540                         wep_cmd->key[i].key_offset = WEP_INVALID_OFFSET;
 541                 }
 542
 543                 wep_cmd->key[i].key_size = priv->wep_keys[i].key_size;
 544                 memcpy(&wep_cmd->key[i].key[3], priv->wep_keys[i].key,
 545                                 priv->wep_keys[i].key_size);
 546         }
 547
 548         wep_cmd->global_key_type = WEP_KEY_WEP_TYPE;
 549         wep_cmd->num_keys = WEP_KEYS_MAX;
 550
 551         cmd_size += sizeof(struct iwl_wep_key) * WEP_KEYS_MAX;
 552
 553         cmd.len = cmd_size;
 554
 555         if (not_empty || send_if_empty)
 556                 return iwl_send_cmd(priv, &cmd);
 557         else
 558                 return 0;
 559 }
 560 EXPORT_SYMBOL(iwl_send_static_wepkey_cmd);
 561
 562 int iwl_remove_default_wep_key(struct iwl_priv *priv,
 563                                struct ieee80211_key_conf *keyconf)
 564 {
 565         int ret;
 566         unsigned long flags;
 567
 568         spin_lock_irqsave(&priv->sta_lock, flags);
 569
 570         if (!test_and_clear_bit(keyconf->keyidx, &priv->ucode_key_table))
 571                 IWL_ERR(priv, "index %d not used in uCode key table.\n",
 572                           keyconf->keyidx);
 573
 574         priv->default_wep_key--;
 575         memset(&priv->wep_keys[keyconf->keyidx], 0, sizeof(priv->wep_keys[0]));
 576         ret = iwl_send_static_wepkey_cmd(priv, 1);
 577         IWL_DEBUG_WEP(priv, "Remove default WEP key: idx=%d ret=%d\n",
 578                       keyconf->keyidx, ret);
 579         spin_unlock_irqrestore(&priv->sta_lock, flags);
 580
 581         return ret;
 582 }
 583 EXPORT_SYMBOL(iwl_remove_default_wep_key);
 584
 585 int iwl_set_default_wep_key(struct iwl_priv *priv,
 586                             struct ieee80211_key_conf *keyconf)
 587 {
 588         int ret;
 589         unsigned long flags;
 590
 591         if (keyconf->keylen != WEP_KEY_LEN_128 &&
 592             keyconf->keylen != WEP_KEY_LEN_64) {
 593                 IWL_DEBUG_WEP(priv, "Bad WEP key length %d\n", keyconf->keylen);
 594                 return -EINVAL;
 595         }
 596
 597         keyconf->flags &= ~IEEE80211_KEY_FLAG_GENERATE_IV;
 598         keyconf->hw_key_idx = HW_KEY_DEFAULT;
 599         priv->stations[IWL_AP_ID].keyinfo.alg = ALG_WEP;
 600
 601         spin_lock_irqsave(&priv->sta_lock, flags);
 602         priv->default_wep_key++;
 603
 604         if (test_and_set_bit(keyconf->keyidx, &priv->ucode_key_table))
 605                 IWL_ERR(priv, "index %d already used in uCode key table.\n",
 606                         keyconf->keyidx);
 607
 608         priv->wep_keys[keyconf->keyidx].key_size = keyconf->keylen;
 609         memcpy(&priv->wep_keys[keyconf->keyidx].key, &keyconf->key,
 610                                                         keyconf->keylen);
 611
 612         ret = iwl_send_static_wepkey_cmd(priv, 0);
 613         IWL_DEBUG_WEP(priv, "Set default WEP key: len=%d idx=%d ret=%d\n",
 614                 keyconf->keylen, keyconf->keyidx, ret);
 615         spin_unlock_irqrestore(&priv->sta_lock, flags);
 616
 617         return ret;
 618 }
 619 EXPORT_SYMBOL(iwl_set_default_wep_key);
 620
 621 static int iwl_set_wep_dynamic_key_info(struct iwl_priv *priv,
 622                                 struct ieee80211_key_conf *keyconf,
 623                                 u8 sta_id)
 624 {
 625         unsigned long flags;
 626         __le16 key_flags = 0;
 627         int ret;
 628
 629         keyconf->flags &= ~IEEE80211_KEY_FLAG_GENERATE_IV;
 630
 631         key_flags |= (STA_KEY_FLG_WEP | STA_KEY_FLG_MAP_KEY_MSK);
 632         key_flags |= cpu_to_le16(keyconf->keyidx << STA_KEY_FLG_KEYID_POS);
 633         key_flags &= ~STA_KEY_FLG_INVALID;
 634
 635         if (keyconf->keylen == WEP_KEY_LEN_128)
 636                 key_flags |= STA_KEY_FLG_KEY_SIZE_MSK;
 637
 638         if (sta_id == priv->hw_params.bcast_sta_id)
 639                 key_flags |= STA_KEY_MULTICAST_MSK;
 640
 641         spin_lock_irqsave(&priv->sta_lock, flags);
 642
 643         priv->stations[sta_id].keyinfo.alg = keyconf->alg;
 644         priv->stations[sta_id].keyinfo.keylen = keyconf->keylen;
 645         priv->stations[sta_id].keyinfo.keyidx = keyconf->keyidx;
 646
 647         memcpy(priv->stations[sta_id].keyinfo.key,
 648                                 keyconf->key, keyconf->keylen);
 649
 650         memcpy(&priv->stations[sta_id].sta.key.key[3],
 651                                 keyconf->key, keyconf->keylen);
 652
 653         if ((priv->stations[sta_id].sta.key.key_flags & STA_KEY_FLG_ENCRYPT_MSK)
 654                         == STA_KEY_FLG_NO_ENC)
 655                 priv->stations[sta_id].sta.key.key_offset =
 656                                  iwl_get_free_ucode_key_index(priv);
 657         /* else, we are overriding an existing key => no need to allocated room
 658          * in uCode. */
 659
 660         WARN(priv->stations[sta_id].sta.key.key_offset == WEP_INVALID_OFFSET,
 661                 "no space for a new key");
 662
 663         priv->stations[sta_id].sta.key.key_flags = key_flags;
 664         priv->stations[sta_id].sta.sta.modify_mask = STA_MODIFY_KEY_MASK;
 665         priv->stations[sta_id].sta.mode = STA_CONTROL_MODIFY_MSK;
 666
 667         ret = iwl_send_add_sta(priv, &priv->stations[sta_id].sta, CMD_ASYNC);
 668
 669         spin_unlock_irqrestore(&priv->sta_lock, flags);
 670
 671         return ret;
 672 }
 673
 674 static int iwl_set_ccmp_dynamic_key_info(struct iwl_priv *priv,
 675                                    struct ieee80211_key_conf *keyconf,
 676                                    u8 sta_id)
 677 {
 678         unsigned long flags;
 679         __le16 key_flags = 0;
 680         int ret;
 681
 682         key_flags |= (STA_KEY_FLG_CCMP | STA_KEY_FLG_MAP_KEY_MSK);
 683         key_flags |= cpu_to_le16(keyconf->keyidx << STA_KEY_FLG_KEYID_POS);
 684         key_flags &= ~STA_KEY_FLG_INVALID;
 685
 686         if (sta_id == priv->hw_params.bcast_sta_id)
 687                 key_flags |= STA_KEY_MULTICAST_MSK;
 688
 689         keyconf->flags |= IEEE80211_KEY_FLAG_GENERATE_IV;
 690
 691         spin_lock_irqsave(&priv->sta_lock, flags);
 692         priv->stations[sta_id].keyinfo.alg = keyconf->alg;
 693         priv->stations[sta_id].keyinfo.keylen = keyconf->keylen;
 694
 695         memcpy(priv->stations[sta_id].keyinfo.key, keyconf->key,
 696                keyconf->keylen);
 697
 698         memcpy(priv->stations[sta_id].sta.key.key, keyconf->key,
 699                keyconf->keylen);
 700
 701         if ((priv->stations[sta_id].sta.key.key_flags & STA_KEY_FLG_ENCRYPT_MSK)
 702                         == STA_KEY_FLG_NO_ENC)
 703                 priv->stations[sta_id].sta.key.key_offset =
 704                                  iwl_get_free_ucode_key_index(priv);
 705         /* else, we are overriding an existing key => no need to allocated room
 706          * in uCode. */
 707
 708         WARN(priv->stations[sta_id].sta.key.key_offset == WEP_INVALID_OFFSET,
 709                 "no space for a new key");
 710
 711         priv->stations[sta_id].sta.key.key_flags = key_flags;
 712         priv->stations[sta_id].sta.sta.modify_mask = STA_MODIFY_KEY_MASK;
 713         priv->stations[sta_id].sta.mode = STA_CONTROL_MODIFY_MSK;
 714
 715         ret = iwl_send_add_sta(priv, &priv->stations[sta_id].sta, CMD_ASYNC);
 716
 717         spin_unlock_irqrestore(&priv->sta_lock, flags);
 718
 719         return ret;
 720 }
 721
 722 static int iwl_set_tkip_dynamic_key_info(struct iwl_priv *priv,
 723                                    struct ieee80211_key_conf *keyconf,
 724                                    u8 sta_id)
 725 {
 726         unsigned long flags;
 727         int ret = 0;
 728         __le16 key_flags = 0;
 729
 730         key_flags |= (STA_KEY_FLG_TKIP | STA_KEY_FLG_MAP_KEY_MSK);
 731         key_flags |= cpu_to_le16(keyconf->keyidx << STA_KEY_FLG_KEYID_POS);
 732         key_flags &= ~STA_KEY_FLG_INVALID;
 733
 734         if (sta_id == priv->hw_params.bcast_sta_id)
 735                 key_flags |= STA_KEY_MULTICAST_MSK;
 736
 737         keyconf->flags |= IEEE80211_KEY_FLAG_GENERATE_IV;
 738         keyconf->flags |= IEEE80211_KEY_FLAG_GENERATE_MMIC;
 739
 740         spin_lock_irqsave(&priv->sta_lock, flags);
 741
 742         priv->stations[sta_id].keyinfo.alg = keyconf->alg;
 743         priv->stations[sta_id].keyinfo.keylen = 16;
 744
 745         if ((priv->stations[sta_id].sta.key.key_flags & STA_KEY_FLG_ENCRYPT_MSK)
 746                         == STA_KEY_FLG_NO_ENC)
 747                 priv->stations[sta_id].sta.key.key_offset =
 748                                  iwl_get_free_ucode_key_index(priv);
 749         /* else, we are overriding an existing key => no need to allocated room
 750          * in uCode. */
 751
 752         WARN(priv->stations[sta_id].sta.key.key_offset == WEP_INVALID_OFFSET,
 753                 "no space for a new key");
 754
 755         priv->stations[sta_id].sta.key.key_flags = key_flags;
 756
 757
 758         /* This copy is acutally not needed: we get the key with each TX */
 759         memcpy(priv->stations[sta_id].keyinfo.key, keyconf->key, 16);
 760
 761         memcpy(priv->stations[sta_id].sta.key.key, keyconf->key, 16);
 762
 763         spin_unlock_irqrestore(&priv->sta_lock, flags);
 764
 765         return ret;
 766 }
 767
 768 void iwl_update_tkip_key(struct iwl_priv *priv,
 769                         struct ieee80211_key_conf *keyconf,
 770                         const u8 *addr, u32 iv32, u16 *phase1key)
 771 {
 772         u8 sta_id = IWL_INVALID_STATION;
 773         unsigned long flags;
 774         int i;
 775
 776         sta_id = iwl_find_station(priv, addr);
 777         if (sta_id == IWL_INVALID_STATION) {
 778                 IWL_DEBUG_MAC80211(priv, "leave - %pM not in station map.\n",
 779                                    addr);
 780                 return;
 781         }
 782
 783         if (iwl_scan_cancel(priv)) {
 784                 /* cancel scan failed, just live w/ bad key and rely
 785                    briefly on SW decryption */
 786                 return;
 787         }
 788
 789         spin_lock_irqsave(&priv->sta_lock, flags);
 790
 791         priv->stations[sta_id].sta.key.tkip_rx_tsc_byte2 = (u8) iv32;
 792
 793         for (i = 0; i < 5; i++)
 794                 priv->stations[sta_id].sta.key.tkip_rx_ttak[i] =
 795                         cpu_to_le16(phase1key[i]);
 796
 797         priv->stations[sta_id].sta.sta.modify_mask = STA_MODIFY_KEY_MASK;
 798         priv->stations[sta_id].sta.mode = STA_CONTROL_MODIFY_MSK;
 799
 800         iwl_send_add_sta(priv, &priv->stations[sta_id].sta, CMD_ASYNC);
 801
 802         spin_unlock_irqrestore(&priv->sta_lock, flags);
 803
 804 }
 805 EXPORT_SYMBOL(iwl_update_tkip_key);
 806
 807 int iwl_remove_dynamic_key(struct iwl_priv *priv,
 808                                 struct ieee80211_key_conf *keyconf,
 809                                 u8 sta_id)
 810 {
 811         unsigned long flags;
 812         int ret = 0;
 813         u16 key_flags;
 814         u8 keyidx;
 815
 816         priv->key_mapping_key--;
 817
 818         spin_lock_irqsave(&priv->sta_lock, flags);
 819         key_flags = le16_to_cpu(priv->stations[sta_id].sta.key.key_flags);
 820         keyidx = (key_flags >> STA_KEY_FLG_KEYID_POS) & 0x3;
 821
 822         IWL_DEBUG_WEP(priv, "Remove dynamic key: idx=%d sta=%d\n",
 823                       keyconf->keyidx, sta_id);
 824
 825         if (keyconf->keyidx != keyidx) {
 826                 /* We need to remove a key with index different that the one
 827                  * in the uCode. This means that the key we need to remove has
 828                  * been replaced by another one with different index.
 829                  * Don't do anything and return ok
 830                  */
 831                 spin_unlock_irqrestore(&priv->sta_lock, flags);
 832                 return 0;
 833         }
 834
 835         if (priv->stations[sta_id].sta.key.key_offset == WEP_INVALID_OFFSET) {
 836                 IWL_WARN(priv, "Removing wrong key %d 0x%x\n",
 837                             keyconf->keyidx, key_flags);
 838                 spin_unlock_irqrestore(&priv->sta_lock, flags);
 839                 return 0;
 840         }
 841
 842         if (!test_and_clear_bit(priv->stations[sta_id].sta.key.key_offset,
 843                 &priv->ucode_key_table))
 844                 IWL_ERR(priv, "index %d not used in uCode key table.\n",
 845                         priv->stations[sta_id].sta.key.key_offset);
 846         memset(&priv->stations[sta_id].keyinfo, 0,
 847                                         sizeof(struct iwl_hw_key));
 848         memset(&priv->stations[sta_id].sta.key, 0,
 849                                         sizeof(struct iwl4965_keyinfo));
 850         priv->stations[sta_id].sta.key.key_flags =
 851                         STA_KEY_FLG_NO_ENC | STA_KEY_FLG_INVALID;
 852         priv->stations[sta_id].sta.key.key_offset = WEP_INVALID_OFFSET;
 853         priv->stations[sta_id].sta.sta.modify_mask = STA_MODIFY_KEY_MASK;
 854         priv->stations[sta_id].sta.mode = STA_CONTROL_MODIFY_MSK;
 855
 856         ret =  iwl_send_add_sta(priv, &priv->stations[sta_id].sta, CMD_ASYNC);
 857         spin_unlock_irqrestore(&priv->sta_lock, flags);
 858         return ret;
 859 }
 860 EXPORT_SYMBOL(iwl_remove_dynamic_key);
 861
 862 int iwl_set_dynamic_key(struct iwl_priv *priv,
 863                                 struct ieee80211_key_conf *keyconf, u8 sta_id)
 864 {
 865         int ret;
 866
 867         priv->key_mapping_key++;
 868         keyconf->hw_key_idx = HW_KEY_DYNAMIC;
 869
 870         switch (keyconf->alg) {
 871         case ALG_CCMP:
 872                 ret = iwl_set_ccmp_dynamic_key_info(priv, keyconf, sta_id);
 873                 break;
 874         case ALG_TKIP:
 875                 ret = iwl_set_tkip_dynamic_key_info(priv, keyconf, sta_id);
 876                 break;
 877         case ALG_WEP:
 878                 ret = iwl_set_wep_dynamic_key_info(priv, keyconf, sta_id);
 879                 break;
 880         default:
 881                 IWL_ERR(priv,
 882                         "Unknown alg: %s alg = %d\n", __func__, keyconf->alg);
 883                 ret = -EINVAL;
 884         }
 885
 886         IWL_DEBUG_WEP(priv, "Set dynamic key: alg= %d len=%d idx=%d sta=%d ret=%d\n",
 887                       keyconf->alg, keyconf->keylen, keyconf->keyidx,
 888                       sta_id, ret);
 889
 890         return ret;
 891 }
 892 EXPORT_SYMBOL(iwl_set_dynamic_key);
 893
 894 #ifdef CONFIG_IWLWIFI_DEBUG
 895 static void iwl_dump_lq_cmd(struct iwl_priv *priv,
 896                            struct iwl_link_quality_cmd *lq)
 897 {
 898         int i;
 899         IWL_DEBUG_RATE(priv, "lq station id 0x%x\n", lq->sta_id);
 900         IWL_DEBUG_RATE(priv, "lq ant 0x%X 0x%X\n",
 901                        lq->general_params.single_stream_ant_msk,
 902                        lq->general_params.dual_stream_ant_msk);
 903
 904         for (i = 0; i < LINK_QUAL_MAX_RETRY_NUM; i++)
 905                 IWL_DEBUG_RATE(priv, "lq index %d 0x%X\n",
 906                                i, lq->rs_table[i].rate_n_flags);
 907 }
 908 #else
 909 static inline void iwl_dump_lq_cmd(struct iwl_priv *priv,
 910                                    struct iwl_link_quality_cmd *lq)
 911 {
 912 }
 913 #endif
 914
 915 int iwl_send_lq_cmd(struct iwl_priv *priv,
 916                     struct iwl_link_quality_cmd *lq, u8 flags)
 917 {
 918         struct iwl_host_cmd cmd = {
 919                 .id = REPLY_TX_LINK_QUALITY_CMD,
 920                 .len = sizeof(struct iwl_link_quality_cmd),
 921                 .meta.flags = flags,
 922                 .data = lq,
 923         };
 924
 925         if ((lq->sta_id == 0xFF) &&
 926             (priv->iw_mode == NL80211_IFTYPE_ADHOC))
 927                 return -EINVAL;
 928
 929         if (lq->sta_id == 0xFF)
 930                 lq->sta_id = IWL_AP_ID;
 931
 932         iwl_dump_lq_cmd(priv, lq);
 933
 934         if (iwl_is_associated(priv) && priv->assoc_station_added)
 935                 return  iwl_send_cmd(priv, &cmd);
 936
 937         return 0;
 938 }
 939 EXPORT_SYMBOL(iwl_send_lq_cmd);
 940
 941 /**
 942  * iwl_sta_init_lq - Initialize a station's hardware rate table
 943  *
 944  * The uCode's station table contains a table of fallback rates
 945  * for automatic fallback during transmission.
 946  *
 947  * NOTE: This sets up a default set of values.  These will be replaced later
 948  *       if the driver's iwl-agn-rs rate scaling algorithm is used, instead of
 949  *       rc80211_simple.
 950  *
 951  * NOTE: Run REPLY_ADD_STA command to set up station table entry, before
 952  *       calling this function (which runs REPLY_TX_LINK_QUALITY_CMD,
 953  *       which requires station table entry to exist).
 954  */
 955 static void iwl_sta_init_lq(struct iwl_priv *priv, const u8 *addr, bool is_ap)
 956 {
 957         int i, r;
 958         struct iwl_link_quality_cmd link_cmd = {
 959                 .reserved1 = 0,
 960         };
 961         u32 rate_flags;
 962
 963         /* Set up the rate scaling to start at selected rate, fall back
 964          * all the way down to 1M in IEEE order, and then spin on 1M */
 965         if (is_ap)
 966                 r = IWL_RATE_54M_INDEX;
 967         else if (priv->band == IEEE80211_BAND_5GHZ)
 968                 r = IWL_RATE_6M_INDEX;
 969         else
 970                 r = IWL_RATE_1M_INDEX;
 971
 972         for (i = 0; i < LINK_QUAL_MAX_RETRY_NUM; i++) {
 973                 rate_flags = 0;
 974                 if (r >= IWL_FIRST_CCK_RATE && r <= IWL_LAST_CCK_RATE)
 975                         rate_flags |= RATE_MCS_CCK_MSK;
 976
 977                 rate_flags |= first_antenna(priv->hw_params.valid_tx_ant) <<
 978                                 RATE_MCS_ANT_POS;
 979
 980                 link_cmd.rs_table[i].rate_n_flags =
 981                         iwl_hw_set_rate_n_flags(iwl_rates[r].plcp, rate_flags);
 982                 r = iwl_get_prev_ieee_rate(r);
 983         }
 984
 985         link_cmd.general_params.single_stream_ant_msk =
 986                                 first_antenna(priv->hw_params.valid_tx_ant);
 987         link_cmd.general_params.dual_stream_ant_msk = 3;
 988         link_cmd.agg_params.agg_dis_start_th = LINK_QUAL_AGG_DISABLE_START_DEF;
 989         link_cmd.agg_params.agg_time_limit =
 990                 cpu_to_le16(LINK_QUAL_AGG_TIME_LIMIT_DEF);
 991
 992         /* Update the rate scaling for control frame Tx to AP */
 993         link_cmd.sta_id = is_ap ? IWL_AP_ID : priv->hw_params.bcast_sta_id;
 994
 995         iwl_send_cmd_pdu_async(priv, REPLY_TX_LINK_QUALITY_CMD,
 996                                sizeof(link_cmd), &link_cmd, NULL);
 997 }
 998
 999 /**
1000  * iwl_rxon_add_station - add station into station table.
1001  *
1002  * there is only one AP station with id= IWL_AP_ID
1003  * NOTE: mutex must be held before calling this function
1004  */
1005 int iwl_rxon_add_station(struct iwl_priv *priv, const u8 *addr, bool is_ap)
1006 {
1007         struct ieee80211_sta *sta;
1008         struct ieee80211_sta_ht_cap ht_config;
1009         struct ieee80211_sta_ht_cap *cur_ht_config = NULL;
1010         u8 sta_id;
1011
1012         /* Add station to device's station table */
1013
1014         /*
1015          * XXX: This check is definitely not correct, if we're an AP
1016          *      it'll always be false which is not what we want, but
1017          *      it doesn't look like iwlagn is prepared to be an HT
1018          *      AP anyway.
1019          */
1020         if (priv->current_ht_config.is_ht) {
1021                 rcu_read_lock();
1022                 sta = ieee80211_find_sta(priv->hw, addr);
1023                 if (sta) {
1024                         memcpy(&ht_config, &sta->ht_cap, sizeof(ht_config));
1025                         cur_ht_config = &ht_config;
1026                 }
1027                 rcu_read_unlock();
1028         }
1029
1030         sta_id = iwl_add_station(priv, addr, is_ap, CMD_SYNC, cur_ht_config);
1031
1032         /* Set up default rate scaling table in device's station table */
1033         iwl_sta_init_lq(priv, addr, is_ap);
1034
1035         return sta_id;
1036 }
1037 EXPORT_SYMBOL(iwl_rxon_add_station);
1038
1039 /**
1040  * iwl_get_sta_id - Find station's index within station table
1041  *
1042  * If new IBSS station, create new entry in station table
1043  */
1044 int iwl_get_sta_id(struct iwl_priv *priv, struct ieee80211_hdr *hdr)
1045 {
1046         int sta_id;
1047         u16 fc = le16_to_cpu(hdr->frame_control);
1048
1049         /* If this frame is broadcast or management, use broadcast station id */
1050         if (((fc & IEEE80211_FCTL_FTYPE) != IEEE80211_FTYPE_DATA) ||
1051             is_multicast_ether_addr(hdr->addr1))
1052                 return priv->hw_params.bcast_sta_id;
1053
1054         switch (priv->iw_mode) {
1055
1056         /* If we are a client station in a BSS network, use the special
1057          * AP station entry (that's the only station we communicate with) */
1058         case NL80211_IFTYPE_STATION:
1059                 return IWL_AP_ID;
1060
1061         /* If we are an AP, then find the station, or use BCAST */
1062         case NL80211_IFTYPE_AP:
1063                 sta_id = iwl_find_station(priv, hdr->addr1);
1064                 if (sta_id != IWL_INVALID_STATION)
1065                         return sta_id;
1066                 return priv->hw_params.bcast_sta_id;
1067
1068         /* If this frame is going out to an IBSS network, find the station,
1069          * or create a new station table entry */
1070         case NL80211_IFTYPE_ADHOC:
1071                 sta_id = iwl_find_station(priv, hdr->addr1);
1072                 if (sta_id != IWL_INVALID_STATION)
1073                         return sta_id;
1074
1075                 /* Create new station table entry */
1076                 sta_id = iwl_add_station(priv, hdr->addr1, false,
1077                                         CMD_ASYNC, NULL);
1078
1079                 if (sta_id != IWL_INVALID_STATION)
1080                         return sta_id;
1081
1082                 IWL_DEBUG_DROP(priv, "Station %pM not in station map. "
1083                                "Defaulting to broadcast...\n",
1084                                hdr->addr1);
1085                 iwl_print_hex_dump(priv, IWL_DL_DROP, (u8 *) hdr, sizeof(*hdr));
1086                 return priv->hw_params.bcast_sta_id;
1087
1088         default:
1089                 IWL_WARN(priv, "Unknown mode of operation: %d\n",
1090                         priv->iw_mode);
1091                 return priv->hw_params.bcast_sta_id;
1092         }
1093 }
1094 EXPORT_SYMBOL(iwl_get_sta_id);
1095
1096 /**
1097  * iwl_sta_tx_modify_enable_tid - Enable Tx for this TID in station table
1098  */
1099 void iwl_sta_tx_modify_enable_tid(struct iwl_priv *priv, int sta_id, int tid)
1100 {
1101         unsigned long flags;
1102
1103         /* Remove "disable" flag, to enable Tx for this TID */
1104         spin_lock_irqsave(&priv->sta_lock, flags);
1105         priv->stations[sta_id].sta.sta.modify_mask = STA_MODIFY_TID_DISABLE_TX;
1106         priv->stations[sta_id].sta.tid_disable_tx &= cpu_to_le16(~(1 << tid));
1107         priv->stations[sta_id].sta.mode = STA_CONTROL_MODIFY_MSK;
1108         spin_unlock_irqrestore(&priv->sta_lock, flags);
1109
1110         iwl_send_add_sta(priv, &priv->stations[sta_id].sta, CMD_ASYNC);
1111 }
1112 EXPORT_SYMBOL(iwl_sta_tx_modify_enable_tid);
1113
1114 int iwl_sta_rx_agg_start(struct iwl_priv *priv,
1115                          const u8 *addr, int tid, u16 ssn)
1116 {
1117         unsigned long flags;
1118         int sta_id;
1119
1120         sta_id = iwl_find_station(priv, addr);
1121         if (sta_id == IWL_INVALID_STATION)
1122                 return -ENXIO;
1123
1124         spin_lock_irqsave(&priv->sta_lock, flags);
1125         priv->stations[sta_id].sta.station_flags_msk = 0;
1126         priv->stations[sta_id].sta.sta.modify_mask = STA_MODIFY_ADDBA_TID_MSK;
1127         priv->stations[sta_id].sta.add_immediate_ba_tid = (u8)tid;
1128         priv->stations[sta_id].sta.add_immediate_ba_ssn = cpu_to_le16(ssn);
1129         priv->stations[sta_id].sta.mode = STA_CONTROL_MODIFY_MSK;
1130         spin_unlock_irqrestore(&priv->sta_lock, flags);
1131
1132         return iwl_send_add_sta(priv, &priv->stations[sta_id].sta,
1133                                         CMD_ASYNC);
1134 }
1135 EXPORT_SYMBOL(iwl_sta_rx_agg_start);
1136
1137 int iwl_sta_rx_agg_stop(struct iwl_priv *priv, const u8 *addr, int tid)
1138 {
1139         unsigned long flags;
1140         int sta_id;
1141
1142         sta_id = iwl_find_station(priv, addr);
1143         if (sta_id == IWL_INVALID_STATION) {
1144                 IWL_ERR(priv, "Invalid station for AGG tid %d\n", tid);
1145                 return -ENXIO;
1146         }
1147
1148         spin_lock_irqsave(&priv->sta_lock, flags);
1149         priv->stations[sta_id].sta.station_flags_msk = 0;
1150         priv->stations[sta_id].sta.sta.modify_mask = STA_MODIFY_DELBA_TID_MSK;
1151         priv->stations[sta_id].sta.remove_immediate_ba_tid = (u8)tid;
1152         priv->stations[sta_id].sta.mode = STA_CONTROL_MODIFY_MSK;
1153         spin_unlock_irqrestore(&priv->sta_lock, flags);
1154
1155         return iwl_send_add_sta(priv, &priv->stations[sta_id].sta,
1156                                         CMD_ASYNC);
1157 }
1158 EXPORT_SYMBOL(iwl_sta_rx_agg_stop);
1159
1160 static void iwl_sta_modify_ps_wake(struct iwl_priv *priv, int sta_id)
1161 {
1162         unsigned long flags;
1163
1164         spin_lock_irqsave(&priv->sta_lock, flags);
1165         priv->stations[sta_id].sta.station_flags &= ~STA_FLG_PWR_SAVE_MSK;
1166         priv->stations[sta_id].sta.station_flags_msk = STA_FLG_PWR_SAVE_MSK;
1167         priv->stations[sta_id].sta.sta.modify_mask = 0;
1168         priv->stations[sta_id].sta.mode = STA_CONTROL_MODIFY_MSK;
1169         spin_unlock_irqrestore(&priv->sta_lock, flags);
1170
1171         iwl_send_add_sta(priv, &priv->stations[sta_id].sta, CMD_ASYNC);
1172 }
1173
1174 void iwl_update_ps_mode(struct iwl_priv *priv, u16 ps_bit, u8 *addr)
1175 {
1176         /* FIXME: need locking over ps_status ??? */
1177         u8 sta_id = iwl_find_station(priv, addr);
1178
1179         if (sta_id != IWL_INVALID_STATION) {
1180                 u8 sta_awake = priv->stations[sta_id].
1181                                 ps_status == STA_PS_STATUS_WAKE;
1182
1183                 if (sta_awake && ps_bit)
1184                         priv->stations[sta_id].ps_status = STA_PS_STATUS_SLEEP;
1185                 else if (!sta_awake && !ps_bit) {
1186                         iwl_sta_modify_ps_wake(priv, sta_id);
1187                         priv->stations[sta_id].ps_status = STA_PS_STATUS_WAKE;
1188                 }
1189         }
1190 }
1191