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