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

   1 /******************************************************************************
   2  *
   3  * Copyright(c) 2003 - 2010 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 #include <linux/sched.h>
  33
  34 #include "iwl-dev.h"
  35 #include "iwl-core.h"
  36 #include "iwl-sta.h"
  37
  38 u8 iwl_find_station(struct iwl_priv *priv, const u8 *addr)
  39 {
  40         int i;
  41         int start = 0;
  42         int ret = IWL_INVALID_STATION;
  43         unsigned long flags;
  44
  45         if ((priv->iw_mode == NL80211_IFTYPE_ADHOC) ||
  46             (priv->iw_mode == NL80211_IFTYPE_AP))
  47                 start = IWL_STA_ID;
  48
  49         if (is_broadcast_ether_addr(addr))
  50                 return priv->hw_params.bcast_sta_id;
  51
  52         spin_lock_irqsave(&priv->sta_lock, flags);
  53         for (i = start; i < priv->hw_params.max_stations; i++)
  54                 if (priv->stations[i].used &&
  55                     (!compare_ether_addr(priv->stations[i].sta.sta.addr,
  56                                          addr))) {
  57                         ret = i;
  58                         goto out;
  59                 }
  60
  61         IWL_DEBUG_ASSOC_LIMIT(priv, "can not find STA %pM total %d\n",
  62                               addr, priv->num_stations);
  63
  64  out:
  65         /*
  66          * It may be possible that more commands interacting with stations
  67          * arrive before we completed processing the adding of
  68          * station
  69          */
  70         if (ret != IWL_INVALID_STATION &&
  71             (!(priv->stations[ret].used & IWL_STA_UCODE_ACTIVE) ||
  72              ((priv->stations[ret].used & IWL_STA_UCODE_ACTIVE) &&
  73               (priv->stations[ret].used & IWL_STA_UCODE_INPROGRESS)))) {
  74                 IWL_ERR(priv, "Requested station info for sta %d before ready.\n",
  75                         ret);
  76                 ret = IWL_INVALID_STATION;
  77         }
  78         spin_unlock_irqrestore(&priv->sta_lock, flags);
  79         return ret;
  80 }
  81 EXPORT_SYMBOL(iwl_find_station);
  82
  83 /* priv->sta_lock must be held */
  84 static void iwl_sta_ucode_activate(struct iwl_priv *priv, u8 sta_id)
  85 {
  86
  87         if (!(priv->stations[sta_id].used & IWL_STA_DRIVER_ACTIVE))
  88                 IWL_ERR(priv, "ACTIVATE a non DRIVER active station id %u addr %pM\n",
  89                         sta_id, priv->stations[sta_id].sta.sta.addr);
  90
  91         if (priv->stations[sta_id].used & IWL_STA_UCODE_ACTIVE) {
  92                 IWL_DEBUG_ASSOC(priv,
  93                                 "STA id %u addr %pM already present in uCode (according to driver)\n",
  94                                 sta_id, priv->stations[sta_id].sta.sta.addr);
  95         } else {
  96                 priv->stations[sta_id].used |= IWL_STA_UCODE_ACTIVE;
  97                 IWL_DEBUG_ASSOC(priv, "Added STA id %u addr %pM to uCode\n",
  98                                 sta_id, priv->stations[sta_id].sta.sta.addr);
  99         }
 100 }
 101
 102 static void iwl_process_add_sta_resp(struct iwl_priv *priv,
 103                                      struct iwl_addsta_cmd *addsta,
 104                                      struct iwl_rx_packet *pkt,
 105                                      bool sync)
 106 {
 107         u8 sta_id = addsta->sta.sta_id;
 108         unsigned long flags;
 109
 110         if (pkt->hdr.flags & IWL_CMD_FAILED_MSK) {
 111                 IWL_ERR(priv, "Bad return from REPLY_ADD_STA (0x%08X)\n",
 112                         pkt->hdr.flags);
 113                 return;
 114         }
 115
 116         IWL_DEBUG_INFO(priv, "Processing response for adding station %u\n",
 117                        sta_id);
 118
 119         spin_lock_irqsave(&priv->sta_lock, flags);
 120
 121         switch (pkt->u.add_sta.status) {
 122         case ADD_STA_SUCCESS_MSK:
 123                 IWL_DEBUG_INFO(priv, "REPLY_ADD_STA PASSED\n");
 124                 iwl_sta_ucode_activate(priv, sta_id);
 125                 break;
 126         case ADD_STA_NO_ROOM_IN_TABLE:
 127                 IWL_ERR(priv, "Adding station %d failed, no room in table.\n",
 128                         sta_id);
 129                 break;
 130         case ADD_STA_NO_BLOCK_ACK_RESOURCE:
 131                 IWL_ERR(priv, "Adding station %d failed, no block ack resource.\n",
 132                         sta_id);
 133                 break;
 134         case ADD_STA_MODIFY_NON_EXIST_STA:
 135                 IWL_ERR(priv, "Attempting to modify non-existing station %d\n",
 136                         sta_id);
 137                 break;
 138         default:
 139                 IWL_DEBUG_ASSOC(priv, "Received REPLY_ADD_STA:(0x%08X)\n",
 140                                 pkt->u.add_sta.status);
 141                 break;
 142         }
 143
 144         IWL_DEBUG_INFO(priv, "%s station id %u addr %pM\n",
 145                        priv->stations[sta_id].sta.mode ==
 146                        STA_CONTROL_MODIFY_MSK ?  "Modified" : "Added",
 147                        sta_id, priv->stations[sta_id].sta.sta.addr);
 148
 149         /*
 150          * XXX: The MAC address in the command buffer is often changed from
 151          * the original sent to the device. That is, the MAC address
 152          * written to the command buffer often is not the same MAC adress
 153          * read from the command buffer when the command returns. This
 154          * issue has not yet been resolved and this debugging is left to
 155          * observe the problem.
 156          */
 157         IWL_DEBUG_INFO(priv, "%s station according to cmd buffer %pM\n",
 158                        priv->stations[sta_id].sta.mode ==
 159                        STA_CONTROL_MODIFY_MSK ? "Modified" : "Added",
 160                        addsta->sta.addr);
 161         spin_unlock_irqrestore(&priv->sta_lock, flags);
 162 }
 163
 164 static void iwl_add_sta_callback(struct iwl_priv *priv,
 165                                  struct iwl_device_cmd *cmd,
 166                                  struct iwl_rx_packet *pkt)
 167 {
 168         struct iwl_addsta_cmd *addsta =
 169                 (struct iwl_addsta_cmd *)cmd->cmd.payload;
 170
 171         iwl_process_add_sta_resp(priv, addsta, pkt, false);
 172
 173 }
 174
 175 int iwl_send_add_sta(struct iwl_priv *priv,
 176                      struct iwl_addsta_cmd *sta, u8 flags)
 177 {
 178         struct iwl_rx_packet *pkt = NULL;
 179         int ret = 0;
 180         u8 data[sizeof(*sta)];
 181         struct iwl_host_cmd cmd = {
 182                 .id = REPLY_ADD_STA,
 183                 .flags = flags,
 184                 .data = data,
 185         };
 186         u8 sta_id __maybe_unused = sta->sta.sta_id;
 187
 188         IWL_DEBUG_INFO(priv, "Adding sta %u (%pM) %ssynchronously\n",
 189                        sta_id, sta->sta.addr, flags & CMD_ASYNC ?  "a" : "");
 190
 191         if (flags & CMD_ASYNC)
 192                 cmd.callback = iwl_add_sta_callback;
 193         else
 194                 cmd.flags |= CMD_WANT_SKB;
 195
 196         cmd.len = priv->cfg->ops->utils->build_addsta_hcmd(sta, data);
 197         ret = iwl_send_cmd(priv, &cmd);
 198
 199         if (ret || (flags & CMD_ASYNC))
 200                 return ret;
 201
 202         if (ret == 0) {
 203                 pkt = (struct iwl_rx_packet *)cmd.reply_page;
 204                 iwl_process_add_sta_resp(priv, sta, pkt, true);
 205         }
 206         iwl_free_pages(priv, cmd.reply_page);
 207
 208         return ret;
 209 }
 210 EXPORT_SYMBOL(iwl_send_add_sta);
 211
 212 static void iwl_set_ht_add_station(struct iwl_priv *priv, u8 index,
 213                                    struct ieee80211_sta_ht_cap *sta_ht_inf)
 214 {
 215         __le32 sta_flags;
 216         u8 mimo_ps_mode;
 217
 218         if (!sta_ht_inf || !sta_ht_inf->ht_supported)
 219                 goto done;
 220
 221         mimo_ps_mode = (sta_ht_inf->cap & IEEE80211_HT_CAP_SM_PS) >> 2;
 222         IWL_DEBUG_ASSOC(priv, "spatial multiplexing power save mode: %s\n",
 223                         (mimo_ps_mode == WLAN_HT_CAP_SM_PS_STATIC) ?
 224                         "static" :
 225                         (mimo_ps_mode == WLAN_HT_CAP_SM_PS_DYNAMIC) ?
 226                         "dynamic" : "disabled");
 227
 228         sta_flags = priv->stations[index].sta.station_flags;
 229
 230         sta_flags &= ~(STA_FLG_RTS_MIMO_PROT_MSK | STA_FLG_MIMO_DIS_MSK);
 231
 232         switch (mimo_ps_mode) {
 233         case WLAN_HT_CAP_SM_PS_STATIC:
 234                 sta_flags |= STA_FLG_MIMO_DIS_MSK;
 235                 break;
 236         case WLAN_HT_CAP_SM_PS_DYNAMIC:
 237                 sta_flags |= STA_FLG_RTS_MIMO_PROT_MSK;
 238                 break;
 239         case WLAN_HT_CAP_SM_PS_DISABLED:
 240                 break;
 241         default:
 242                 IWL_WARN(priv, "Invalid MIMO PS mode %d\n", mimo_ps_mode);
 243                 break;
 244         }
 245
 246         sta_flags |= cpu_to_le32(
 247               (u32)sta_ht_inf->ampdu_factor << STA_FLG_MAX_AGG_SIZE_POS);
 248
 249         sta_flags |= cpu_to_le32(
 250               (u32)sta_ht_inf->ampdu_density << STA_FLG_AGG_MPDU_DENSITY_POS);
 251
 252         if (iwl_is_ht40_tx_allowed(priv, sta_ht_inf))
 253                 sta_flags |= STA_FLG_HT40_EN_MSK;
 254         else
 255                 sta_flags &= ~STA_FLG_HT40_EN_MSK;
 256
 257         priv->stations[index].sta.station_flags = sta_flags;
 258  done:
 259         return;
 260 }
 261
 262 /**
 263  * iwl_prep_station - Prepare station information for addition
 264  *
 265  * should be called with sta_lock held
 266  */
 267 static u8 iwl_prep_station(struct iwl_priv *priv, const u8 *addr,
 268                            bool is_ap,
 269                            struct ieee80211_sta_ht_cap *ht_info)
 270 {
 271         struct iwl_station_entry *station;
 272         int i;
 273         u8 sta_id = IWL_INVALID_STATION;
 274         u16 rate;
 275
 276         if (is_ap)
 277                 sta_id = IWL_AP_ID;
 278         else if (is_broadcast_ether_addr(addr))
 279                 sta_id = priv->hw_params.bcast_sta_id;
 280         else
 281                 for (i = IWL_STA_ID; i < priv->hw_params.max_stations; i++) {
 282                         if (!compare_ether_addr(priv->stations[i].sta.sta.addr,
 283                                                 addr)) {
 284                                 sta_id = i;
 285                                 break;
 286                         }
 287
 288                         if (!priv->stations[i].used &&
 289                             sta_id == IWL_INVALID_STATION)
 290                                 sta_id = i;
 291                 }
 292
 293         /*
 294          * These two conditions have the same outcome, but keep them
 295          * separate
 296          */
 297         if (unlikely(sta_id == IWL_INVALID_STATION))
 298                 return sta_id;
 299
 300         /*
 301          * uCode is not able to deal with multiple requests to add a
 302          * station. Keep track if one is in progress so that we do not send
 303          * another.
 304          */
 305         if (priv->stations[sta_id].used & IWL_STA_UCODE_INPROGRESS) {
 306                 IWL_DEBUG_INFO(priv, "STA %d already in process of being added.\n",
 307                                 sta_id);
 308                 return sta_id;
 309         }
 310
 311         if ((priv->stations[sta_id].used & IWL_STA_DRIVER_ACTIVE) &&
 312             (priv->stations[sta_id].used & IWL_STA_UCODE_ACTIVE) &&
 313             !compare_ether_addr(priv->stations[sta_id].sta.sta.addr, addr)) {
 314                 IWL_DEBUG_ASSOC(priv, "STA %d (%pM) already added, not adding again.\n",
 315                                 sta_id, addr);
 316                 return sta_id;
 317         }
 318
 319         station = &priv->stations[sta_id];
 320         station->used = IWL_STA_DRIVER_ACTIVE;
 321         IWL_DEBUG_ASSOC(priv, "Add STA to driver ID %d: %pM\n",
 322                         sta_id, addr);
 323         priv->num_stations++;
 324
 325         /* Set up the REPLY_ADD_STA command to send to device */
 326         memset(&station->sta, 0, sizeof(struct iwl_addsta_cmd));
 327         memcpy(station->sta.sta.addr, addr, ETH_ALEN);
 328         station->sta.mode = 0;
 329         station->sta.sta.sta_id = sta_id;
 330         station->sta.station_flags = 0;
 331
 332         /* BCAST station and IBSS stations do not work in HT mode */
 333         if (sta_id != priv->hw_params.bcast_sta_id &&
 334             priv->iw_mode != NL80211_IFTYPE_ADHOC)
 335                 iwl_set_ht_add_station(priv, sta_id, ht_info);
 336
 337         /* 3945 only */
 338         rate = (priv->band == IEEE80211_BAND_5GHZ) ?
 339                 IWL_RATE_6M_PLCP : IWL_RATE_1M_PLCP;
 340         /* Turn on both antennas for the station... */
 341         station->sta.rate_n_flags = cpu_to_le16(rate | RATE_MCS_ANT_AB_MSK);
 342
 343         return sta_id;
 344
 345 }
 346
 347 #define STA_WAIT_TIMEOUT (HZ/2)
 348
 349 /**
 350  * iwl_add_station_common -
 351  */
 352 int iwl_add_station_common(struct iwl_priv *priv, const u8 *addr,
 353                                   bool is_ap,
 354                                   struct ieee80211_sta_ht_cap *ht_info,
 355                                   u8 *sta_id_r)
 356 {
 357         struct iwl_station_entry *station;
 358         unsigned long flags_spin;
 359         int ret = 0;
 360         u8 sta_id;
 361
 362         *sta_id_r = 0;
 363         spin_lock_irqsave(&priv->sta_lock, flags_spin);
 364         sta_id = iwl_prep_station(priv, addr, is_ap, ht_info);
 365         if (sta_id == IWL_INVALID_STATION) {
 366                 IWL_ERR(priv, "Unable to prepare station %pM for addition\n",
 367                         addr);
 368                 spin_unlock_irqrestore(&priv->sta_lock, flags_spin);
 369                 return -EINVAL;
 370         }
 371
 372         /*
 373          * uCode is not able to deal with multiple requests to add a
 374          * station. Keep track if one is in progress so that we do not send
 375          * another.
 376          */
 377         if (priv->stations[sta_id].used & IWL_STA_UCODE_INPROGRESS) {
 378                 IWL_DEBUG_INFO(priv, "STA %d already in process of being added.\n",
 379                                sta_id);
 380                 spin_unlock_irqrestore(&priv->sta_lock, flags_spin);
 381                 return -EEXIST;
 382         }
 383
 384         if ((priv->stations[sta_id].used & IWL_STA_DRIVER_ACTIVE) &&
 385             (priv->stations[sta_id].used & IWL_STA_UCODE_ACTIVE)) {
 386                 IWL_DEBUG_ASSOC(priv, "STA %d (%pM) already added, not adding again.\n",
 387                                 sta_id, addr);
 388                 spin_unlock_irqrestore(&priv->sta_lock, flags_spin);
 389                 return -EEXIST;
 390         }
 391
 392         priv->stations[sta_id].used |= IWL_STA_UCODE_INPROGRESS;
 393         station = &priv->stations[sta_id];
 394         spin_unlock_irqrestore(&priv->sta_lock, flags_spin);
 395
 396         /* Add station to device's station table */
 397         ret = iwl_send_add_sta(priv, &station->sta, CMD_SYNC);
 398         if (ret) {
 399                 IWL_ERR(priv, "Adding station %pM failed.\n", station->sta.sta.addr);
 400                 spin_lock_irqsave(&priv->sta_lock, flags_spin);
 401                 priv->stations[sta_id].used &= ~IWL_STA_DRIVER_ACTIVE;
 402                 priv->stations[sta_id].used &= ~IWL_STA_UCODE_INPROGRESS;
 403                 spin_unlock_irqrestore(&priv->sta_lock, flags_spin);
 404         }
 405         *sta_id_r = sta_id;
 406         return ret;
 407 }
 408 EXPORT_SYMBOL(iwl_add_station_common);
 409
 410 static struct iwl_link_quality_cmd *iwl_sta_alloc_lq(struct iwl_priv *priv,
 411                                                      u8 sta_id)
 412 {
 413         int i, r;
 414         struct iwl_link_quality_cmd *link_cmd;
 415         u32 rate_flags;
 416
 417         link_cmd = kzalloc(sizeof(struct iwl_link_quality_cmd), GFP_KERNEL);
 418         if (!link_cmd) {
 419                 IWL_ERR(priv, "Unable to allocate memory for LQ cmd.\n");
 420                 return NULL;
 421         }
 422         /* Set up the rate scaling to start at selected rate, fall back
 423          * all the way down to 1M in IEEE order, and then spin on 1M */
 424         if (priv->band == IEEE80211_BAND_5GHZ)
 425                 r = IWL_RATE_6M_INDEX;
 426         else
 427                 r = IWL_RATE_1M_INDEX;
 428
 429         for (i = 0; i < LINK_QUAL_MAX_RETRY_NUM; i++) {
 430                 rate_flags = 0;
 431                 if (r >= IWL_FIRST_CCK_RATE && r <= IWL_LAST_CCK_RATE)
 432                         rate_flags |= RATE_MCS_CCK_MSK;
 433
 434                 rate_flags |= first_antenna(priv->hw_params.valid_tx_ant) <<
 435                                 RATE_MCS_ANT_POS;
 436
 437                 link_cmd->rs_table[i].rate_n_flags =
 438                         iwl_hw_set_rate_n_flags(iwl_rates[r].plcp, rate_flags);
 439                 r = iwl_get_prev_ieee_rate(r);
 440         }
 441
 442         link_cmd->general_params.single_stream_ant_msk =
 443                                 first_antenna(priv->hw_params.valid_tx_ant);
 444
 445         link_cmd->general_params.dual_stream_ant_msk =
 446                 priv->hw_params.valid_tx_ant &
 447                 ~first_antenna(priv->hw_params.valid_tx_ant);
 448         if (!link_cmd->general_params.dual_stream_ant_msk) {
 449                 link_cmd->general_params.dual_stream_ant_msk = ANT_AB;
 450         } else if (num_of_ant(priv->hw_params.valid_tx_ant) == 2) {
 451                 link_cmd->general_params.dual_stream_ant_msk =
 452                         priv->hw_params.valid_tx_ant;
 453         }
 454
 455         link_cmd->agg_params.agg_dis_start_th = LINK_QUAL_AGG_DISABLE_START_DEF;
 456         link_cmd->agg_params.agg_time_limit =
 457                 cpu_to_le16(LINK_QUAL_AGG_TIME_LIMIT_DEF);
 458
 459         link_cmd->sta_id = sta_id;
 460
 461         return link_cmd;
 462 }
 463
 464 /*
 465  * iwl_add_local_station - Add stations not requested by mac80211
 466  *
 467  * This will be either the broadcast station or the bssid station needed by
 468  * ad-hoc.
 469  *
 470  * Function sleeps.
 471  */
 472 int iwl_add_local_station(struct iwl_priv *priv, const u8 *addr, bool init_rs,
 473                           u8 *sta_id_r)
 474 {
 475         int ret;
 476         u8 sta_id;
 477         struct iwl_link_quality_cmd *link_cmd;
 478         unsigned long flags;
 479
 480         if (*sta_id_r)
 481                 *sta_id_r = IWL_INVALID_STATION;
 482
 483         ret = iwl_add_station_common(priv, addr, 0, NULL, &sta_id);
 484         if (ret) {
 485                 IWL_ERR(priv, "Unable to add station %pM\n", addr);
 486                 return ret;
 487         }
 488
 489         if (sta_id_r)
 490                 *sta_id_r = sta_id;
 491
 492         spin_lock_irqsave(&priv->sta_lock, flags);
 493         priv->stations[sta_id].used |= IWL_STA_LOCAL;
 494         spin_unlock_irqrestore(&priv->sta_lock, flags);
 495
 496         if (init_rs) {
 497                 /* Set up default rate scaling table in device's station table */
 498                 link_cmd = iwl_sta_alloc_lq(priv, sta_id);
 499                 if (!link_cmd) {
 500                         IWL_ERR(priv, "Unable to initialize rate scaling for station %pM.\n",
 501                                 addr);
 502                         return -ENOMEM;
 503                 }
 504
 505                 ret = iwl_send_lq_cmd(priv, link_cmd, CMD_SYNC, true);
 506                 if (ret)
 507                         IWL_ERR(priv, "Link quality command failed (%d)\n", ret);
 508
 509                 spin_lock_irqsave(&priv->sta_lock, flags);
 510                 priv->stations[sta_id].lq = link_cmd;
 511                 spin_unlock_irqrestore(&priv->sta_lock, flags);
 512         }
 513
 514         return 0;
 515 }
 516 EXPORT_SYMBOL(iwl_add_local_station);
 517
 518 /**
 519  * iwl_sta_ucode_deactivate - deactivate ucode status for a station
 520  *
 521  * priv->sta_lock must be held
 522  */
 523 static void iwl_sta_ucode_deactivate(struct iwl_priv *priv, u8 sta_id)
 524 {
 525         /* Ucode must be active and driver must be non active */
 526         if ((priv->stations[sta_id].used &
 527              (IWL_STA_UCODE_ACTIVE | IWL_STA_DRIVER_ACTIVE)) != IWL_STA_UCODE_ACTIVE)
 528                 IWL_ERR(priv, "removed non active STA %u\n", sta_id);
 529
 530         priv->stations[sta_id].used &= ~IWL_STA_UCODE_ACTIVE;
 531
 532         memset(&priv->stations[sta_id], 0, sizeof(struct iwl_station_entry));
 533         IWL_DEBUG_ASSOC(priv, "Removed STA %u\n", sta_id);
 534 }
 535
 536 static int iwl_send_remove_station(struct iwl_priv *priv,
 537                                    struct iwl_station_entry *station)
 538 {
 539         struct iwl_rx_packet *pkt;
 540         int ret;
 541
 542         unsigned long flags_spin;
 543         struct iwl_rem_sta_cmd rm_sta_cmd;
 544
 545         struct iwl_host_cmd cmd = {
 546                 .id = REPLY_REMOVE_STA,
 547                 .len = sizeof(struct iwl_rem_sta_cmd),
 548                 .flags = CMD_SYNC,
 549                 .data = &rm_sta_cmd,
 550         };
 551
 552         memset(&rm_sta_cmd, 0, sizeof(rm_sta_cmd));
 553         rm_sta_cmd.num_sta = 1;
 554         memcpy(&rm_sta_cmd.addr, &station->sta.sta.addr , ETH_ALEN);
 555
 556         cmd.flags |= CMD_WANT_SKB;
 557
 558         ret = iwl_send_cmd(priv, &cmd);
 559
 560         if (ret)
 561                 return ret;
 562
 563         pkt = (struct iwl_rx_packet *)cmd.reply_page;
 564         if (pkt->hdr.flags & IWL_CMD_FAILED_MSK) {
 565                 IWL_ERR(priv, "Bad return from REPLY_REMOVE_STA (0x%08X)\n",
 566                           pkt->hdr.flags);
 567                 ret = -EIO;
 568         }
 569
 570         if (!ret) {
 571                 switch (pkt->u.rem_sta.status) {
 572                 case REM_STA_SUCCESS_MSK:
 573                         spin_lock_irqsave(&priv->sta_lock, flags_spin);
 574                         iwl_sta_ucode_deactivate(priv, station->sta.sta.sta_id);
 575                         spin_unlock_irqrestore(&priv->sta_lock, flags_spin);
 576                         IWL_DEBUG_ASSOC(priv, "REPLY_REMOVE_STA PASSED\n");
 577                         break;
 578                 default:
 579                         ret = -EIO;
 580                         IWL_ERR(priv, "REPLY_REMOVE_STA failed\n");
 581                         break;
 582                 }
 583         }
 584         iwl_free_pages(priv, cmd.reply_page);
 585
 586         return ret;
 587 }
 588
 589 /**
 590  * iwl_remove_station - Remove driver's knowledge of station.
 591  */
 592 int iwl_remove_station(struct iwl_priv *priv, const u8 sta_id,
 593                        const u8 *addr)
 594 {
 595         struct iwl_station_entry *station;
 596         unsigned long flags;
 597
 598         if (!iwl_is_ready(priv)) {
 599                 IWL_DEBUG_INFO(priv,
 600                         "Unable to remove station %pM, device not ready.\n",
 601                         addr);
 602                 /*
 603                  * It is typical for stations to be removed when we are
 604                  * going down. Return success since device will be down
 605                  * soon anyway
 606                  */
 607                 return 0;
 608         }
 609
 610         IWL_DEBUG_ASSOC(priv, "Removing STA from driver:%d  %pM\n",
 611                         sta_id, addr);
 612
 613         if (WARN_ON(sta_id == IWL_INVALID_STATION))
 614                 return -EINVAL;
 615
 616         spin_lock_irqsave(&priv->sta_lock, flags);
 617
 618         if (!(priv->stations[sta_id].used & IWL_STA_DRIVER_ACTIVE)) {
 619                 IWL_DEBUG_INFO(priv, "Removing %pM but non DRIVER active\n",
 620                                 addr);
 621                 goto out_err;
 622         }
 623
 624         if (!(priv->stations[sta_id].used & IWL_STA_UCODE_ACTIVE)) {
 625                 IWL_DEBUG_INFO(priv, "Removing %pM but non UCODE active\n",
 626                                 addr);
 627                 goto out_err;
 628         }
 629
 630         if (priv->stations[sta_id].used & IWL_STA_LOCAL) {
 631                 kfree(priv->stations[sta_id].lq);
 632                 priv->stations[sta_id].lq = NULL;
 633         }
 634
 635         priv->stations[sta_id].used &= ~IWL_STA_DRIVER_ACTIVE;
 636
 637         priv->num_stations--;
 638
 639         BUG_ON(priv->num_stations < 0);
 640
 641         station = &priv->stations[sta_id];
 642         spin_unlock_irqrestore(&priv->sta_lock, flags);
 643
 644         return iwl_send_remove_station(priv, station);
 645 out_err:
 646         spin_unlock_irqrestore(&priv->sta_lock, flags);
 647         return -EINVAL;
 648 }
 649 EXPORT_SYMBOL_GPL(iwl_remove_station);
 650
 651 /**
 652  * iwl_clear_ucode_stations - clear ucode station table bits
 653  *
 654  * This function clears all the bits in the driver indicating
 655  * which stations are active in the ucode. Call when something
 656  * other than explicit station management would cause this in
 657  * the ucode, e.g. unassociated RXON.
 658  */
 659 void iwl_clear_ucode_stations(struct iwl_priv *priv)
 660 {
 661         int i;
 662         unsigned long flags_spin;
 663         bool cleared = false;
 664
 665         IWL_DEBUG_INFO(priv, "Clearing ucode stations in driver\n");
 666
 667         spin_lock_irqsave(&priv->sta_lock, flags_spin);
 668         for (i = 0; i < priv->hw_params.max_stations; i++) {
 669                 if (priv->stations[i].used & IWL_STA_UCODE_ACTIVE) {
 670                         IWL_DEBUG_INFO(priv, "Clearing ucode active for station %d\n", i);
 671                         priv->stations[i].used &= ~IWL_STA_UCODE_ACTIVE;
 672                         cleared = true;
 673                 }
 674         }
 675         spin_unlock_irqrestore(&priv->sta_lock, flags_spin);
 676
 677         if (!cleared)
 678                 IWL_DEBUG_INFO(priv, "No active stations found to be cleared\n");
 679 }
 680 EXPORT_SYMBOL(iwl_clear_ucode_stations);
 681
 682 /**
 683  * iwl_restore_stations() - Restore driver known stations to device
 684  *
 685  * All stations considered active by driver, but not present in ucode, is
 686  * restored.
 687  *
 688  * Function sleeps.
 689  */
 690 void iwl_restore_stations(struct iwl_priv *priv)
 691 {
 692         struct iwl_station_entry *station;
 693         unsigned long flags_spin;
 694         int i;
 695         bool found = false;
 696         int ret;
 697
 698         if (!iwl_is_ready(priv)) {
 699                 IWL_DEBUG_INFO(priv, "Not ready yet, not restoring any stations.\n");
 700                 return;
 701         }
 702
 703         IWL_DEBUG_ASSOC(priv, "Restoring all known stations ... start.\n");
 704         spin_lock_irqsave(&priv->sta_lock, flags_spin);
 705         for (i = 0; i < priv->hw_params.max_stations; i++) {
 706                 if ((priv->stations[i].used & IWL_STA_DRIVER_ACTIVE) &&
 707                             !(priv->stations[i].used & IWL_STA_UCODE_ACTIVE)) {
 708                         IWL_DEBUG_ASSOC(priv, "Restoring sta %pM\n",
 709                                         priv->stations[i].sta.sta.addr);
 710                         priv->stations[i].sta.mode = 0;
 711                         priv->stations[i].used |= IWL_STA_UCODE_INPROGRESS;
 712                         found = true;
 713                 }
 714         }
 715
 716         for (i = 0; i < priv->hw_params.max_stations; i++) {
 717                 if ((priv->stations[i].used & IWL_STA_UCODE_INPROGRESS)) {
 718                         spin_unlock_irqrestore(&priv->sta_lock, flags_spin);
 719                         station = &priv->stations[i];
 720                         ret = iwl_send_add_sta(priv, &priv->stations[i].sta, CMD_SYNC);
 721                         if (ret) {
 722                                 IWL_ERR(priv, "Adding station %pM failed.\n",
 723                                         station->sta.sta.addr);
 724                                 spin_lock_irqsave(&priv->sta_lock, flags_spin);
 725                                 priv->stations[i].used &= ~IWL_STA_DRIVER_ACTIVE;
 726                                 priv->stations[i].used &= ~IWL_STA_UCODE_INPROGRESS;
 727                                 spin_unlock_irqrestore(&priv->sta_lock, flags_spin);
 728                         }
 729                         /*
 730                          * Rate scaling has already been initialized, send
 731                          * current LQ command
 732                          */
 733                         if (station->lq)
 734                                 iwl_send_lq_cmd(priv, station->lq, CMD_SYNC, true);
 735                         spin_lock_irqsave(&priv->sta_lock, flags_spin);
 736                         priv->stations[i].used &= ~IWL_STA_UCODE_INPROGRESS;
 737                 }
 738         }
 739
 740         spin_unlock_irqrestore(&priv->sta_lock, flags_spin);
 741         if (!found)
 742                 IWL_DEBUG_INFO(priv, "Restoring all known stations .... no stations to be restored.\n");
 743         else
 744                 IWL_DEBUG_INFO(priv, "Restoring all known stations .... complete.\n");
 745 }
 746 EXPORT_SYMBOL(iwl_restore_stations);
 747
 748 int iwl_get_free_ucode_key_index(struct iwl_priv *priv)
 749 {
 750         int i;
 751
 752         for (i = 0; i < STA_KEY_MAX_NUM; i++)
 753                 if (!test_and_set_bit(i, &priv->ucode_key_table))
 754                         return i;
 755
 756         return WEP_INVALID_OFFSET;
 757 }
 758 EXPORT_SYMBOL(iwl_get_free_ucode_key_index);
 759
 760 static int iwl_send_static_wepkey_cmd(struct iwl_priv *priv, u8 send_if_empty)
 761 {
 762         int i, not_empty = 0;
 763         u8 buff[sizeof(struct iwl_wep_cmd) +
 764                 sizeof(struct iwl_wep_key) * WEP_KEYS_MAX];
 765         struct iwl_wep_cmd *wep_cmd = (struct iwl_wep_cmd *)buff;
 766         size_t cmd_size  = sizeof(struct iwl_wep_cmd);
 767         struct iwl_host_cmd cmd = {
 768                 .id = REPLY_WEPKEY,
 769                 .data = wep_cmd,
 770                 .flags = CMD_SYNC,
 771         };
 772
 773         might_sleep();
 774
 775         memset(wep_cmd, 0, cmd_size +
 776                         (sizeof(struct iwl_wep_key) * WEP_KEYS_MAX));
 777
 778         for (i = 0; i < WEP_KEYS_MAX ; i++) {
 779                 wep_cmd->key[i].key_index = i;
 780                 if (priv->wep_keys[i].key_size) {
 781                         wep_cmd->key[i].key_offset = i;
 782                         not_empty = 1;
 783                 } else {
 784                         wep_cmd->key[i].key_offset = WEP_INVALID_OFFSET;
 785                 }
 786
 787                 wep_cmd->key[i].key_size = priv->wep_keys[i].key_size;
 788                 memcpy(&wep_cmd->key[i].key[3], priv->wep_keys[i].key,
 789                                 priv->wep_keys[i].key_size);
 790         }
 791
 792         wep_cmd->global_key_type = WEP_KEY_WEP_TYPE;
 793         wep_cmd->num_keys = WEP_KEYS_MAX;
 794
 795         cmd_size += sizeof(struct iwl_wep_key) * WEP_KEYS_MAX;
 796
 797         cmd.len = cmd_size;
 798
 799         if (not_empty || send_if_empty)
 800                 return iwl_send_cmd(priv, &cmd);
 801         else
 802                 return 0;
 803 }
 804
 805 int iwl_restore_default_wep_keys(struct iwl_priv *priv)
 806 {
 807         WARN_ON(!mutex_is_locked(&priv->mutex));
 808
 809         return iwl_send_static_wepkey_cmd(priv, 0);
 810 }
 811 EXPORT_SYMBOL(iwl_restore_default_wep_keys);
 812
 813 int iwl_remove_default_wep_key(struct iwl_priv *priv,
 814                                struct ieee80211_key_conf *keyconf)
 815 {
 816         int ret;
 817
 818         WARN_ON(!mutex_is_locked(&priv->mutex));
 819
 820         IWL_DEBUG_WEP(priv, "Removing default WEP key: idx=%d\n",
 821                       keyconf->keyidx);
 822
 823         memset(&priv->wep_keys[keyconf->keyidx], 0, sizeof(priv->wep_keys[0]));
 824         if (iwl_is_rfkill(priv)) {
 825                 IWL_DEBUG_WEP(priv, "Not sending REPLY_WEPKEY command due to RFKILL.\n");
 826                 /* but keys in device are clear anyway so return success */
 827                 return 0;
 828         }
 829         ret = iwl_send_static_wepkey_cmd(priv, 1);
 830         IWL_DEBUG_WEP(priv, "Remove default WEP key: idx=%d ret=%d\n",
 831                       keyconf->keyidx, ret);
 832
 833         return ret;
 834 }
 835 EXPORT_SYMBOL(iwl_remove_default_wep_key);
 836
 837 int iwl_set_default_wep_key(struct iwl_priv *priv,
 838                             struct ieee80211_key_conf *keyconf)
 839 {
 840         int ret;
 841
 842         WARN_ON(!mutex_is_locked(&priv->mutex));
 843
 844         if (keyconf->keylen != WEP_KEY_LEN_128 &&
 845             keyconf->keylen != WEP_KEY_LEN_64) {
 846                 IWL_DEBUG_WEP(priv, "Bad WEP key length %d\n", keyconf->keylen);
 847                 return -EINVAL;
 848         }
 849
 850         keyconf->flags &= ~IEEE80211_KEY_FLAG_GENERATE_IV;
 851         keyconf->hw_key_idx = HW_KEY_DEFAULT;
 852         priv->stations[IWL_AP_ID].keyinfo.alg = ALG_WEP;
 853
 854         priv->wep_keys[keyconf->keyidx].key_size = keyconf->keylen;
 855         memcpy(&priv->wep_keys[keyconf->keyidx].key, &keyconf->key,
 856                                                         keyconf->keylen);
 857
 858         ret = iwl_send_static_wepkey_cmd(priv, 0);
 859         IWL_DEBUG_WEP(priv, "Set default WEP key: len=%d idx=%d ret=%d\n",
 860                 keyconf->keylen, keyconf->keyidx, ret);
 861
 862         return ret;
 863 }
 864 EXPORT_SYMBOL(iwl_set_default_wep_key);
 865
 866 static int iwl_set_wep_dynamic_key_info(struct iwl_priv *priv,
 867                                 struct ieee80211_key_conf *keyconf,
 868                                 u8 sta_id)
 869 {
 870         unsigned long flags;
 871         __le16 key_flags = 0;
 872         int ret;
 873
 874         keyconf->flags &= ~IEEE80211_KEY_FLAG_GENERATE_IV;
 875
 876         key_flags |= (STA_KEY_FLG_WEP | STA_KEY_FLG_MAP_KEY_MSK);
 877         key_flags |= cpu_to_le16(keyconf->keyidx << STA_KEY_FLG_KEYID_POS);
 878         key_flags &= ~STA_KEY_FLG_INVALID;
 879
 880         if (keyconf->keylen == WEP_KEY_LEN_128)
 881                 key_flags |= STA_KEY_FLG_KEY_SIZE_MSK;
 882
 883         if (sta_id == priv->hw_params.bcast_sta_id)
 884                 key_flags |= STA_KEY_MULTICAST_MSK;
 885
 886         spin_lock_irqsave(&priv->sta_lock, flags);
 887
 888         priv->stations[sta_id].keyinfo.alg = keyconf->alg;
 889         priv->stations[sta_id].keyinfo.keylen = keyconf->keylen;
 890         priv->stations[sta_id].keyinfo.keyidx = keyconf->keyidx;
 891
 892         memcpy(priv->stations[sta_id].keyinfo.key,
 893                                 keyconf->key, keyconf->keylen);
 894
 895         memcpy(&priv->stations[sta_id].sta.key.key[3],
 896                                 keyconf->key, keyconf->keylen);
 897
 898         if ((priv->stations[sta_id].sta.key.key_flags & STA_KEY_FLG_ENCRYPT_MSK)
 899                         == STA_KEY_FLG_NO_ENC)
 900                 priv->stations[sta_id].sta.key.key_offset =
 901                                  iwl_get_free_ucode_key_index(priv);
 902         /* else, we are overriding an existing key => no need to allocated room
 903          * in uCode. */
 904
 905         WARN(priv->stations[sta_id].sta.key.key_offset == WEP_INVALID_OFFSET,
 906                 "no space for a new key");
 907
 908         priv->stations[sta_id].sta.key.key_flags = key_flags;
 909         priv->stations[sta_id].sta.sta.modify_mask = STA_MODIFY_KEY_MASK;
 910         priv->stations[sta_id].sta.mode = STA_CONTROL_MODIFY_MSK;
 911
 912         ret = iwl_send_add_sta(priv, &priv->stations[sta_id].sta, CMD_ASYNC);
 913
 914         spin_unlock_irqrestore(&priv->sta_lock, flags);
 915
 916         return ret;
 917 }
 918
 919 static int iwl_set_ccmp_dynamic_key_info(struct iwl_priv *priv,
 920                                    struct ieee80211_key_conf *keyconf,
 921                                    u8 sta_id)
 922 {
 923         unsigned long flags;
 924         __le16 key_flags = 0;
 925         int ret;
 926
 927         key_flags |= (STA_KEY_FLG_CCMP | STA_KEY_FLG_MAP_KEY_MSK);
 928         key_flags |= cpu_to_le16(keyconf->keyidx << STA_KEY_FLG_KEYID_POS);
 929         key_flags &= ~STA_KEY_FLG_INVALID;
 930
 931         if (sta_id == priv->hw_params.bcast_sta_id)
 932                 key_flags |= STA_KEY_MULTICAST_MSK;
 933
 934         keyconf->flags |= IEEE80211_KEY_FLAG_GENERATE_IV;
 935
 936         spin_lock_irqsave(&priv->sta_lock, flags);
 937         priv->stations[sta_id].keyinfo.alg = keyconf->alg;
 938         priv->stations[sta_id].keyinfo.keylen = keyconf->keylen;
 939
 940         memcpy(priv->stations[sta_id].keyinfo.key, keyconf->key,
 941                keyconf->keylen);
 942
 943         memcpy(priv->stations[sta_id].sta.key.key, keyconf->key,
 944                keyconf->keylen);
 945
 946         if ((priv->stations[sta_id].sta.key.key_flags & STA_KEY_FLG_ENCRYPT_MSK)
 947                         == STA_KEY_FLG_NO_ENC)
 948                 priv->stations[sta_id].sta.key.key_offset =
 949                                  iwl_get_free_ucode_key_index(priv);
 950         /* else, we are overriding an existing key => no need to allocated room
 951          * in uCode. */
 952
 953         WARN(priv->stations[sta_id].sta.key.key_offset == WEP_INVALID_OFFSET,
 954                 "no space for a new key");
 955
 956         priv->stations[sta_id].sta.key.key_flags = key_flags;
 957         priv->stations[sta_id].sta.sta.modify_mask = STA_MODIFY_KEY_MASK;
 958         priv->stations[sta_id].sta.mode = STA_CONTROL_MODIFY_MSK;
 959
 960         ret = iwl_send_add_sta(priv, &priv->stations[sta_id].sta, CMD_ASYNC);
 961
 962         spin_unlock_irqrestore(&priv->sta_lock, flags);
 963
 964         return ret;
 965 }
 966
 967 static int iwl_set_tkip_dynamic_key_info(struct iwl_priv *priv,
 968                                    struct ieee80211_key_conf *keyconf,
 969                                    u8 sta_id)
 970 {
 971         unsigned long flags;
 972         int ret = 0;
 973         __le16 key_flags = 0;
 974
 975         key_flags |= (STA_KEY_FLG_TKIP | STA_KEY_FLG_MAP_KEY_MSK);
 976         key_flags |= cpu_to_le16(keyconf->keyidx << STA_KEY_FLG_KEYID_POS);
 977         key_flags &= ~STA_KEY_FLG_INVALID;
 978
 979         if (sta_id == priv->hw_params.bcast_sta_id)
 980                 key_flags |= STA_KEY_MULTICAST_MSK;
 981
 982         keyconf->flags |= IEEE80211_KEY_FLAG_GENERATE_IV;
 983         keyconf->flags |= IEEE80211_KEY_FLAG_GENERATE_MMIC;
 984
 985         spin_lock_irqsave(&priv->sta_lock, flags);
 986
 987         priv->stations[sta_id].keyinfo.alg = keyconf->alg;
 988         priv->stations[sta_id].keyinfo.keylen = 16;
 989
 990         if ((priv->stations[sta_id].sta.key.key_flags & STA_KEY_FLG_ENCRYPT_MSK)
 991                         == STA_KEY_FLG_NO_ENC)
 992                 priv->stations[sta_id].sta.key.key_offset =
 993                                  iwl_get_free_ucode_key_index(priv);
 994         /* else, we are overriding an existing key => no need to allocated room
 995          * in uCode. */
 996
 997         WARN(priv->stations[sta_id].sta.key.key_offset == WEP_INVALID_OFFSET,
 998                 "no space for a new key");
 999
1000         priv->stations[sta_id].sta.key.key_flags = key_flags;
1001
1002
1003         /* This copy is acutally not needed: we get the key with each TX */
1004         memcpy(priv->stations[sta_id].keyinfo.key, keyconf->key, 16);
1005
1006         memcpy(priv->stations[sta_id].sta.key.key, keyconf->key, 16);
1007
1008         spin_unlock_irqrestore(&priv->sta_lock, flags);
1009
1010         return ret;
1011 }
1012
1013 void iwl_update_tkip_key(struct iwl_priv *priv,
1014                         struct ieee80211_key_conf *keyconf,
1015                         const u8 *addr, u32 iv32, u16 *phase1key)
1016 {
1017         u8 sta_id = IWL_INVALID_STATION;
1018         unsigned long flags;
1019         int i;
1020
1021         sta_id = iwl_find_station(priv, addr);
1022         if (sta_id == IWL_INVALID_STATION) {
1023                 IWL_DEBUG_MAC80211(priv, "leave - %pM not in station map.\n",
1024                                    addr);
1025                 return;
1026         }
1027
1028         if (iwl_scan_cancel(priv)) {
1029                 /* cancel scan failed, just live w/ bad key and rely
1030                    briefly on SW decryption */
1031                 return;
1032         }
1033
1034         spin_lock_irqsave(&priv->sta_lock, flags);
1035
1036         priv->stations[sta_id].sta.key.tkip_rx_tsc_byte2 = (u8) iv32;
1037
1038         for (i = 0; i < 5; i++)
1039                 priv->stations[sta_id].sta.key.tkip_rx_ttak[i] =
1040                         cpu_to_le16(phase1key[i]);
1041
1042         priv->stations[sta_id].sta.sta.modify_mask = STA_MODIFY_KEY_MASK;
1043         priv->stations[sta_id].sta.mode = STA_CONTROL_MODIFY_MSK;
1044
1045         iwl_send_add_sta(priv, &priv->stations[sta_id].sta, CMD_ASYNC);
1046
1047         spin_unlock_irqrestore(&priv->sta_lock, flags);
1048
1049 }
1050 EXPORT_SYMBOL(iwl_update_tkip_key);
1051
1052 int iwl_remove_dynamic_key(struct iwl_priv *priv,
1053                                 struct ieee80211_key_conf *keyconf,
1054                                 u8 sta_id)
1055 {
1056         unsigned long flags;
1057         int ret = 0;
1058         u16 key_flags;
1059         u8 keyidx;
1060
1061         priv->key_mapping_key--;
1062
1063         spin_lock_irqsave(&priv->sta_lock, flags);
1064         key_flags = le16_to_cpu(priv->stations[sta_id].sta.key.key_flags);
1065         keyidx = (key_flags >> STA_KEY_FLG_KEYID_POS) & 0x3;
1066
1067         IWL_DEBUG_WEP(priv, "Remove dynamic key: idx=%d sta=%d\n",
1068                       keyconf->keyidx, sta_id);
1069
1070         if (keyconf->keyidx != keyidx) {
1071                 /* We need to remove a key with index different that the one
1072                  * in the uCode. This means that the key we need to remove has
1073                  * been replaced by another one with different index.
1074                  * Don't do anything and return ok
1075                  */
1076                 spin_unlock_irqrestore(&priv->sta_lock, flags);
1077                 return 0;
1078         }
1079
1080         if (priv->stations[sta_id].sta.key.key_offset == WEP_INVALID_OFFSET) {
1081                 IWL_WARN(priv, "Removing wrong key %d 0x%x\n",
1082                             keyconf->keyidx, key_flags);
1083                 spin_unlock_irqrestore(&priv->sta_lock, flags);
1084                 return 0;
1085         }
1086
1087         if (!test_and_clear_bit(priv->stations[sta_id].sta.key.key_offset,
1088                 &priv->ucode_key_table))
1089                 IWL_ERR(priv, "index %d not used in uCode key table.\n",
1090                         priv->stations[sta_id].sta.key.key_offset);
1091         memset(&priv->stations[sta_id].keyinfo, 0,
1092                                         sizeof(struct iwl_hw_key));
1093         memset(&priv->stations[sta_id].sta.key, 0,
1094                                         sizeof(struct iwl4965_keyinfo));
1095         priv->stations[sta_id].sta.key.key_flags =
1096                         STA_KEY_FLG_NO_ENC | STA_KEY_FLG_INVALID;
1097         priv->stations[sta_id].sta.key.key_offset = WEP_INVALID_OFFSET;
1098         priv->stations[sta_id].sta.sta.modify_mask = STA_MODIFY_KEY_MASK;
1099         priv->stations[sta_id].sta.mode = STA_CONTROL_MODIFY_MSK;
1100
1101         if (iwl_is_rfkill(priv)) {
1102                 IWL_DEBUG_WEP(priv, "Not sending REPLY_ADD_STA command because RFKILL enabled.\n");
1103                 spin_unlock_irqrestore(&priv->sta_lock, flags);
1104                 return 0;
1105         }
1106         ret =  iwl_send_add_sta(priv, &priv->stations[sta_id].sta, CMD_ASYNC);
1107         spin_unlock_irqrestore(&priv->sta_lock, flags);
1108         return ret;
1109 }
1110 EXPORT_SYMBOL(iwl_remove_dynamic_key);
1111
1112 int iwl_set_dynamic_key(struct iwl_priv *priv,
1113                                 struct ieee80211_key_conf *keyconf, u8 sta_id)
1114 {
1115         int ret;
1116
1117         priv->key_mapping_key++;
1118         keyconf->hw_key_idx = HW_KEY_DYNAMIC;
1119
1120         switch (keyconf->alg) {
1121         case ALG_CCMP:
1122                 ret = iwl_set_ccmp_dynamic_key_info(priv, keyconf, sta_id);
1123                 break;
1124         case ALG_TKIP:
1125                 ret = iwl_set_tkip_dynamic_key_info(priv, keyconf, sta_id);
1126                 break;
1127         case ALG_WEP:
1128                 ret = iwl_set_wep_dynamic_key_info(priv, keyconf, sta_id);
1129                 break;
1130         default:
1131                 IWL_ERR(priv,
1132                         "Unknown alg: %s alg = %d\n", __func__, keyconf->alg);
1133                 ret = -EINVAL;
1134         }
1135
1136         IWL_DEBUG_WEP(priv, "Set dynamic key: alg= %d len=%d idx=%d sta=%d ret=%d\n",
1137                       keyconf->alg, keyconf->keylen, keyconf->keyidx,
1138                       sta_id, ret);
1139
1140         return ret;
1141 }
1142 EXPORT_SYMBOL(iwl_set_dynamic_key);
1143
1144 #ifdef CONFIG_IWLWIFI_DEBUG
1145 static void iwl_dump_lq_cmd(struct iwl_priv *priv,
1146                            struct iwl_link_quality_cmd *lq)
1147 {
1148         int i;
1149         IWL_DEBUG_RATE(priv, "lq station id 0x%x\n", lq->sta_id);
1150         IWL_DEBUG_RATE(priv, "lq ant 0x%X 0x%X\n",
1151                        lq->general_params.single_stream_ant_msk,
1152                        lq->general_params.dual_stream_ant_msk);
1153
1154         for (i = 0; i < LINK_QUAL_MAX_RETRY_NUM; i++)
1155                 IWL_DEBUG_RATE(priv, "lq index %d 0x%X\n",
1156                                i, lq->rs_table[i].rate_n_flags);
1157 }
1158 #else
1159 static inline void iwl_dump_lq_cmd(struct iwl_priv *priv,
1160                                    struct iwl_link_quality_cmd *lq)
1161 {
1162 }
1163 #endif
1164
1165 /**
1166  * is_lq_table_valid() - Test one aspect of LQ cmd for validity
1167  *
1168  * It sometimes happens when a HT rate has been in use and we
1169  * loose connectivity with AP then mac80211 will first tell us that the
1170  * current channel is not HT anymore before removing the station. In such a
1171  * scenario the RXON flags will be updated to indicate we are not
1172  * communicating HT anymore, but the LQ command may still contain HT rates.
1173  * Test for this to prevent driver from sending LQ command between the time
1174  * RXON flags are updated and when LQ command is updated.
1175  */
1176 static bool is_lq_table_valid(struct iwl_priv *priv,
1177                               struct iwl_link_quality_cmd *lq)
1178 {
1179         int i;
1180         struct iwl_ht_config *ht_conf = &priv->current_ht_config;
1181
1182         if (ht_conf->is_ht)
1183                 return true;
1184
1185         IWL_DEBUG_INFO(priv, "Channel %u is not an HT channel\n",
1186                        priv->active_rxon.channel);
1187         for (i = 0; i < LINK_QUAL_MAX_RETRY_NUM; i++) {
1188                 if (le32_to_cpu(lq->rs_table[i].rate_n_flags) & RATE_MCS_HT_MSK) {
1189                         IWL_DEBUG_INFO(priv,
1190                                        "index %d of LQ expects HT channel\n",
1191                                        i);
1192                         return false;
1193                 }
1194         }
1195         return true;
1196 }
1197
1198 /**
1199  * iwl_send_lq_cmd() - Send link quality command
1200  * @init: This command is sent as part of station initialization right
1201  *        after station has been added.
1202  *
1203  * The link quality command is sent as the last step of station creation.
1204  * This is the special case in which init is set and we call a callback in
1205  * this case to clear the state indicating that station creation is in
1206  * progress.
1207  */
1208 int iwl_send_lq_cmd(struct iwl_priv *priv,
1209                     struct iwl_link_quality_cmd *lq, u8 flags, bool init)
1210 {
1211         int ret = 0;
1212         unsigned long flags_spin;
1213
1214         struct iwl_host_cmd cmd = {
1215                 .id = REPLY_TX_LINK_QUALITY_CMD,
1216                 .len = sizeof(struct iwl_link_quality_cmd),
1217                 .flags = flags,
1218                 .data = lq,
1219         };
1220
1221         if (WARN_ON(lq->sta_id == IWL_INVALID_STATION))
1222                 return -EINVAL;
1223
1224         iwl_dump_lq_cmd(priv, lq);
1225         BUG_ON(init && (cmd.flags & CMD_ASYNC));
1226
1227         if (is_lq_table_valid(priv, lq))
1228                 ret = iwl_send_cmd(priv, &cmd);
1229         else
1230                 ret = -EINVAL;
1231
1232         if (cmd.flags & CMD_ASYNC)
1233                 return ret;
1234
1235         if (init) {
1236                 IWL_DEBUG_INFO(priv, "init LQ command complete, clearing sta addition status for sta %d\n",
1237                                lq->sta_id);
1238                 spin_lock_irqsave(&priv->sta_lock, flags_spin);
1239                 priv->stations[lq->sta_id].used &= ~IWL_STA_UCODE_INPROGRESS;
1240                 spin_unlock_irqrestore(&priv->sta_lock, flags_spin);
1241         }
1242         return ret;
1243 }
1244 EXPORT_SYMBOL(iwl_send_lq_cmd);
1245
1246 /**
1247  * iwl_alloc_bcast_station - add broadcast station into driver's station table.
1248  *
1249  * This adds the broadcast station into the driver's station table
1250  * and marks it driver active, so that it will be restored to the
1251  * device at the next best time.
1252  */
1253 int iwl_alloc_bcast_station(struct iwl_priv *priv, bool init_lq)
1254 {
1255         struct iwl_link_quality_cmd *link_cmd;
1256         unsigned long flags;
1257         u8 sta_id;
1258
1259         spin_lock_irqsave(&priv->sta_lock, flags);
1260         sta_id = iwl_prep_station(priv, iwl_bcast_addr, false, NULL);
1261         if (sta_id == IWL_INVALID_STATION) {
1262                 IWL_ERR(priv, "Unable to prepare broadcast station\n");
1263                 spin_unlock_irqrestore(&priv->sta_lock, flags);
1264
1265                 return -EINVAL;
1266         }
1267
1268         priv->stations[sta_id].used |= IWL_STA_DRIVER_ACTIVE;
1269         priv->stations[sta_id].used |= IWL_STA_BCAST;
1270         spin_unlock_irqrestore(&priv->sta_lock, flags);
1271
1272         if (init_lq) {
1273                 link_cmd = iwl_sta_alloc_lq(priv, sta_id);
1274                 if (!link_cmd) {
1275                         IWL_ERR(priv,
1276                                 "Unable to initialize rate scaling for bcast station.\n");
1277                         return -ENOMEM;
1278                 }
1279
1280                 spin_lock_irqsave(&priv->sta_lock, flags);
1281                 priv->stations[sta_id].lq = link_cmd;
1282                 spin_unlock_irqrestore(&priv->sta_lock, flags);
1283         }
1284
1285         return 0;
1286 }
1287 EXPORT_SYMBOL_GPL(iwl_alloc_bcast_station);
1288
1289 void iwl_dealloc_bcast_station(struct iwl_priv *priv)
1290 {
1291         unsigned long flags;
1292         int i;
1293
1294         spin_lock_irqsave(&priv->sta_lock, flags);
1295         for (i = 0; i < priv->hw_params.max_stations; i++) {
1296                 if (!(priv->stations[i].used & IWL_STA_BCAST))
1297                         continue;
1298
1299                 priv->stations[i].used &= ~IWL_STA_UCODE_ACTIVE;
1300                 priv->num_stations--;
1301                 BUG_ON(priv->num_stations < 0);
1302                 kfree(priv->stations[i].lq);
1303                 priv->stations[i].lq = NULL;
1304         }
1305         spin_unlock_irqrestore(&priv->sta_lock, flags);
1306 }
1307 EXPORT_SYMBOL_GPL(iwl_dealloc_bcast_station);
1308
1309 /**
1310  * iwl_get_sta_id - Find station's index within station table
1311  *
1312  * If new IBSS station, create new entry in station table
1313  */
1314 int iwl_get_sta_id(struct iwl_priv *priv, struct ieee80211_hdr *hdr)
1315 {
1316         int sta_id;
1317         __le16 fc = hdr->frame_control;
1318
1319         /* If this frame is broadcast or management, use broadcast station id */
1320         if (!ieee80211_is_data(fc) ||  is_multicast_ether_addr(hdr->addr1))
1321                 return priv->hw_params.bcast_sta_id;
1322
1323         switch (priv->iw_mode) {
1324
1325         /* If we are a client station in a BSS network, use the special
1326          * AP station entry (that's the only station we communicate with) */
1327         case NL80211_IFTYPE_STATION:
1328                 /*
1329                  * If addition of station not complete yet, which means
1330                  * that rate scaling has not been initialized, then return
1331                  * the broadcast station.
1332                  */
1333                 if (!(priv->stations[IWL_AP_ID].used & IWL_STA_UCODE_ACTIVE))
1334                         return priv->hw_params.bcast_sta_id;
1335                 return IWL_AP_ID;
1336
1337         /* If we are an AP, then find the station, or use BCAST */
1338         case NL80211_IFTYPE_AP:
1339                 sta_id = iwl_find_station(priv, hdr->addr1);
1340                 if (sta_id != IWL_INVALID_STATION)
1341                         return sta_id;
1342                 return priv->hw_params.bcast_sta_id;
1343
1344         /* If this frame is going out to an IBSS network, find the station,
1345          * or create a new station table entry */
1346         case NL80211_IFTYPE_ADHOC:
1347                 sta_id = iwl_find_station(priv, hdr->addr1);
1348                 if (sta_id != IWL_INVALID_STATION)
1349                         return sta_id;
1350
1351                 IWL_DEBUG_DROP(priv, "Station %pM not in station map. "
1352                                "Defaulting to broadcast...\n",
1353                                hdr->addr1);
1354                 iwl_print_hex_dump(priv, IWL_DL_DROP, (u8 *) hdr, sizeof(*hdr));
1355                 return priv->hw_params.bcast_sta_id;
1356
1357         default:
1358                 IWL_WARN(priv, "Unknown mode of operation: %d\n",
1359                         priv->iw_mode);
1360                 return priv->hw_params.bcast_sta_id;
1361         }
1362 }
1363 EXPORT_SYMBOL(iwl_get_sta_id);
1364
1365 /**
1366  * iwl_sta_tx_modify_enable_tid - Enable Tx for this TID in station table
1367  */
1368 void iwl_sta_tx_modify_enable_tid(struct iwl_priv *priv, int sta_id, int tid)
1369 {
1370         unsigned long flags;
1371
1372         /* Remove "disable" flag, to enable Tx for this TID */
1373         spin_lock_irqsave(&priv->sta_lock, flags);
1374         priv->stations[sta_id].sta.sta.modify_mask = STA_MODIFY_TID_DISABLE_TX;
1375         priv->stations[sta_id].sta.tid_disable_tx &= cpu_to_le16(~(1 << tid));
1376         priv->stations[sta_id].sta.mode = STA_CONTROL_MODIFY_MSK;
1377         spin_unlock_irqrestore(&priv->sta_lock, flags);
1378
1379         iwl_send_add_sta(priv, &priv->stations[sta_id].sta, CMD_ASYNC);
1380 }
1381 EXPORT_SYMBOL(iwl_sta_tx_modify_enable_tid);
1382
1383 int iwl_sta_rx_agg_start(struct iwl_priv *priv,
1384                          const u8 *addr, int tid, u16 ssn)
1385 {
1386         unsigned long flags;
1387         int sta_id;
1388
1389         sta_id = iwl_find_station(priv, addr);
1390         if (sta_id == IWL_INVALID_STATION)
1391                 return -ENXIO;
1392
1393         spin_lock_irqsave(&priv->sta_lock, flags);
1394         priv->stations[sta_id].sta.station_flags_msk = 0;
1395         priv->stations[sta_id].sta.sta.modify_mask = STA_MODIFY_ADDBA_TID_MSK;
1396         priv->stations[sta_id].sta.add_immediate_ba_tid = (u8)tid;
1397         priv->stations[sta_id].sta.add_immediate_ba_ssn = cpu_to_le16(ssn);
1398         priv->stations[sta_id].sta.mode = STA_CONTROL_MODIFY_MSK;
1399         spin_unlock_irqrestore(&priv->sta_lock, flags);
1400
1401         return iwl_send_add_sta(priv, &priv->stations[sta_id].sta,
1402                                         CMD_ASYNC);
1403 }
1404 EXPORT_SYMBOL(iwl_sta_rx_agg_start);
1405
1406 int iwl_sta_rx_agg_stop(struct iwl_priv *priv, const u8 *addr, int tid)
1407 {
1408         unsigned long flags;
1409         int sta_id;
1410
1411         sta_id = iwl_find_station(priv, addr);
1412         if (sta_id == IWL_INVALID_STATION) {
1413                 IWL_ERR(priv, "Invalid station for AGG tid %d\n", tid);
1414                 return -ENXIO;
1415         }
1416
1417         spin_lock_irqsave(&priv->sta_lock, flags);
1418         priv->stations[sta_id].sta.station_flags_msk = 0;
1419         priv->stations[sta_id].sta.sta.modify_mask = STA_MODIFY_DELBA_TID_MSK;
1420         priv->stations[sta_id].sta.remove_immediate_ba_tid = (u8)tid;
1421         priv->stations[sta_id].sta.mode = STA_CONTROL_MODIFY_MSK;
1422         spin_unlock_irqrestore(&priv->sta_lock, flags);
1423
1424         return iwl_send_add_sta(priv, &priv->stations[sta_id].sta,
1425                                         CMD_ASYNC);
1426 }
1427 EXPORT_SYMBOL(iwl_sta_rx_agg_stop);
1428
1429 void iwl_sta_modify_ps_wake(struct iwl_priv *priv, int sta_id)
1430 {
1431         unsigned long flags;
1432
1433         spin_lock_irqsave(&priv->sta_lock, flags);
1434         priv->stations[sta_id].sta.station_flags &= ~STA_FLG_PWR_SAVE_MSK;
1435         priv->stations[sta_id].sta.station_flags_msk = STA_FLG_PWR_SAVE_MSK;
1436         priv->stations[sta_id].sta.sta.modify_mask = 0;
1437         priv->stations[sta_id].sta.sleep_tx_count = 0;
1438         priv->stations[sta_id].sta.mode = STA_CONTROL_MODIFY_MSK;
1439         spin_unlock_irqrestore(&priv->sta_lock, flags);
1440
1441         iwl_send_add_sta(priv, &priv->stations[sta_id].sta, CMD_ASYNC);
1442 }
1443 EXPORT_SYMBOL(iwl_sta_modify_ps_wake);
1444
1445 void iwl_sta_modify_sleep_tx_count(struct iwl_priv *priv, int sta_id, int cnt)
1446 {
1447         unsigned long flags;
1448
1449         spin_lock_irqsave(&priv->sta_lock, flags);
1450         priv->stations[sta_id].sta.station_flags |= STA_FLG_PWR_SAVE_MSK;
1451         priv->stations[sta_id].sta.station_flags_msk = STA_FLG_PWR_SAVE_MSK;
1452         priv->stations[sta_id].sta.sta.modify_mask =
1453                                         STA_MODIFY_SLEEP_TX_COUNT_MSK;
1454         priv->stations[sta_id].sta.sleep_tx_count = cpu_to_le16(cnt);
1455         priv->stations[sta_id].sta.mode = STA_CONTROL_MODIFY_MSK;
1456         spin_unlock_irqrestore(&priv->sta_lock, flags);
1457
1458         iwl_send_add_sta(priv, &priv->stations[sta_id].sta, CMD_ASYNC);
1459 }
1460 EXPORT_SYMBOL(iwl_sta_modify_sleep_tx_count);
1461
1462 int iwl_mac_sta_remove(struct ieee80211_hw *hw,
1463                        struct ieee80211_vif *vif,
1464                        struct ieee80211_sta *sta)
1465 {
1466         struct iwl_priv *priv = hw->priv;
1467         struct iwl_station_priv_common *sta_common = (void *)sta->drv_priv;
1468         int ret;
1469
1470         IWL_DEBUG_INFO(priv, "received request to remove station %pM\n",
1471                         sta->addr);
1472         ret = iwl_remove_station(priv, sta_common->sta_id, sta->addr);
1473         if (ret)
1474                 IWL_ERR(priv, "Error removing station %pM\n",
1475                         sta->addr);
1476         return ret;
1477 }
1478 EXPORT_SYMBOL(iwl_mac_sta_remove);