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_stations - 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 {
 474         int ret;
 475         u8 sta_id;
 476         struct iwl_link_quality_cmd *link_cmd;
 477         unsigned long flags;
 478
 479         ret = iwl_add_station_common(priv, addr, 0, NULL, &sta_id);
 480         if (ret) {
 481                 IWL_ERR(priv, "Unable to add station %pM\n", addr);
 482                 return ret;
 483         }
 484
 485         spin_lock_irqsave(&priv->sta_lock, flags);
 486         priv->stations[sta_id].used |= IWL_STA_LOCAL;
 487         spin_unlock_irqrestore(&priv->sta_lock, flags);
 488
 489         if (init_rs) {
 490                 /* Set up default rate scaling table in device's station table */
 491                 link_cmd = iwl_sta_alloc_lq(priv, sta_id);
 492                 if (!link_cmd) {
 493                         IWL_ERR(priv, "Unable to initialize rate scaling for station %pM.\n",
 494                                 addr);
 495                         return -ENOMEM;
 496                 }
 497
 498                 ret = iwl_send_lq_cmd(priv, link_cmd, CMD_SYNC, true);
 499                 if (ret)
 500                         IWL_ERR(priv, "Link quality command failed (%d)\n", ret);
 501
 502                 spin_lock_irqsave(&priv->sta_lock, flags);
 503                 priv->stations[sta_id].lq = link_cmd;
 504                 spin_unlock_irqrestore(&priv->sta_lock, flags);
 505         }
 506
 507         return 0;
 508 }
 509 EXPORT_SYMBOL(iwl_add_local_station);
 510
 511 /**
 512  * iwl_sta_ucode_deactivate - deactivate ucode status for a station
 513  *
 514  * priv->sta_lock must be held
 515  */
 516 static void iwl_sta_ucode_deactivate(struct iwl_priv *priv, u8 sta_id)
 517 {
 518         /* Ucode must be active and driver must be non active */
 519         if ((priv->stations[sta_id].used &
 520              (IWL_STA_UCODE_ACTIVE | IWL_STA_DRIVER_ACTIVE)) != IWL_STA_UCODE_ACTIVE)
 521                 IWL_ERR(priv, "removed non active STA %u\n", sta_id);
 522
 523         priv->stations[sta_id].used &= ~IWL_STA_UCODE_ACTIVE;
 524
 525         memset(&priv->stations[sta_id], 0, sizeof(struct iwl_station_entry));
 526         IWL_DEBUG_ASSOC(priv, "Removed STA %u\n", sta_id);
 527 }
 528
 529 static int iwl_send_remove_station(struct iwl_priv *priv,
 530                                    struct iwl_station_entry *station)
 531 {
 532         struct iwl_rx_packet *pkt;
 533         int ret;
 534
 535         unsigned long flags_spin;
 536         struct iwl_rem_sta_cmd rm_sta_cmd;
 537
 538         struct iwl_host_cmd cmd = {
 539                 .id = REPLY_REMOVE_STA,
 540                 .len = sizeof(struct iwl_rem_sta_cmd),
 541                 .flags = CMD_SYNC,
 542                 .data = &rm_sta_cmd,
 543         };
 544
 545         memset(&rm_sta_cmd, 0, sizeof(rm_sta_cmd));
 546         rm_sta_cmd.num_sta = 1;
 547         memcpy(&rm_sta_cmd.addr, &station->sta.sta.addr , ETH_ALEN);
 548
 549         cmd.flags |= CMD_WANT_SKB;
 550
 551         ret = iwl_send_cmd(priv, &cmd);
 552
 553         if (ret)
 554                 return ret;
 555
 556         pkt = (struct iwl_rx_packet *)cmd.reply_page;
 557         if (pkt->hdr.flags & IWL_CMD_FAILED_MSK) {
 558                 IWL_ERR(priv, "Bad return from REPLY_REMOVE_STA (0x%08X)\n",
 559                           pkt->hdr.flags);
 560                 ret = -EIO;
 561         }
 562
 563         if (!ret) {
 564                 switch (pkt->u.rem_sta.status) {
 565                 case REM_STA_SUCCESS_MSK:
 566                         spin_lock_irqsave(&priv->sta_lock, flags_spin);
 567                         iwl_sta_ucode_deactivate(priv, station->sta.sta.sta_id);
 568                         spin_unlock_irqrestore(&priv->sta_lock, flags_spin);
 569                         IWL_DEBUG_ASSOC(priv, "REPLY_REMOVE_STA PASSED\n");
 570                         break;
 571                 default:
 572                         ret = -EIO;
 573                         IWL_ERR(priv, "REPLY_REMOVE_STA failed\n");
 574                         break;
 575                 }
 576         }
 577         iwl_free_pages(priv, cmd.reply_page);
 578
 579         return ret;
 580 }
 581
 582 /**
 583  * iwl_remove_station - Remove driver's knowledge of station.
 584  */
 585 int iwl_remove_station(struct iwl_priv *priv, const u8 *addr)
 586 {
 587         int sta_id = IWL_INVALID_STATION;
 588         int i, ret = -EINVAL;
 589         unsigned long flags;
 590         bool is_ap = priv->iw_mode == NL80211_IFTYPE_STATION;
 591         struct iwl_station_entry *station;
 592
 593         if (!iwl_is_ready(priv)) {
 594                 IWL_DEBUG_INFO(priv,
 595                         "Unable to remove station %pM, device not ready.\n",
 596                         addr);
 597                 /*
 598                  * It is typical for stations to be removed when we are
 599                  * going down. Return success since device will be down
 600                  * soon anyway
 601                  */
 602                 return 0;
 603         }
 604
 605         spin_lock_irqsave(&priv->sta_lock, flags);
 606
 607         if (is_ap)
 608                 sta_id = IWL_AP_ID;
 609         else
 610                 for (i = IWL_STA_ID; i < priv->hw_params.max_stations; i++)
 611                         if (priv->stations[i].used &&
 612                             !compare_ether_addr(priv->stations[i].sta.sta.addr,
 613                                                 addr)) {
 614                                 sta_id = i;
 615                                 break;
 616                         }
 617
 618         if (unlikely(sta_id == IWL_INVALID_STATION))
 619                 goto out;
 620
 621         IWL_DEBUG_ASSOC(priv, "Removing STA from driver:%d  %pM\n",
 622                 sta_id, addr);
 623
 624         if (!(priv->stations[sta_id].used & IWL_STA_DRIVER_ACTIVE)) {
 625                 IWL_DEBUG_INFO(priv, "Removing %pM but non DRIVER active\n",
 626                                 addr);
 627                 goto out;
 628         }
 629
 630         if (!(priv->stations[sta_id].used & IWL_STA_UCODE_ACTIVE)) {
 631                 IWL_DEBUG_INFO(priv, "Removing %pM but non UCODE active\n",
 632                                 addr);
 633                 goto out;
 634         }
 635
 636         if (priv->stations[sta_id].used & IWL_STA_LOCAL) {
 637                 kfree(priv->stations[sta_id].lq);
 638                 priv->stations[sta_id].lq = NULL;
 639         }
 640
 641         priv->stations[sta_id].used &= ~IWL_STA_DRIVER_ACTIVE;
 642
 643         priv->num_stations--;
 644
 645         BUG_ON(priv->num_stations < 0);
 646
 647         station = &priv->stations[sta_id];
 648         spin_unlock_irqrestore(&priv->sta_lock, flags);
 649
 650         ret = iwl_send_remove_station(priv, station);
 651         return ret;
 652 out:
 653         spin_unlock_irqrestore(&priv->sta_lock, flags);
 654         return ret;
 655 }
 656 EXPORT_SYMBOL_GPL(iwl_remove_station);
 657
 658 /**
 659  * iwl_clear_ucode_stations() - clear entire station table driver and/or ucode
 660  * @priv:
 661  * @force: If set then the uCode station table needs to be cleared here. If
 662  *         not set then the uCode station table has already been cleared,
 663  *         for example after sending it a RXON command without ASSOC bit
 664  *         set, and we just need to change driver state here.
 665  */
 666 void iwl_clear_ucode_stations(struct iwl_priv *priv, bool force)
 667 {
 668         int i;
 669         unsigned long flags_spin;
 670         bool cleared = false;
 671
 672         IWL_DEBUG_INFO(priv, "Clearing ucode stations in driver%s\n",
 673                         force ? " and ucode" : "");
 674
 675         if (force) {
 676                 if (!iwl_is_ready(priv)) {
 677                         /*
 678                          * If device is not ready at this point the station
 679                          * table is likely already empty (uCode not ready
 680                          * to receive station requests) or will soon be
 681                          * due to interface going down.
 682                          */
 683                         IWL_DEBUG_INFO(priv, "Unable to remove stations from device - device not ready\n");
 684                 } else {
 685                         iwl_send_cmd_pdu_async(priv, REPLY_REMOVE_ALL_STA, 0, NULL, NULL);
 686                 }
 687         }
 688
 689         spin_lock_irqsave(&priv->sta_lock, flags_spin);
 690         if (force) {
 691                 IWL_DEBUG_INFO(priv, "Clearing all station information in driver\n");
 692                 /*
 693                  * The station entry contains a link to the LQ command. For
 694                  * all stations managed by mac80211 this memory will be
 695                  * managed by it also. For local stations (broadcast and
 696                  * bssid station when in adhoc mode) we need to maintain
 697                  * this lq command separately. This memory is created when
 698                  * these stations are added.
 699                  */
 700                 for (i = 0; i < priv->hw_params.max_stations; i++) {
 701                         if (priv->stations[i].used & IWL_STA_LOCAL) {
 702                                 kfree(priv->stations[i].lq);
 703                                 priv->stations[i].lq = NULL;
 704                         }
 705                 }
 706                 priv->num_stations = 0;
 707                 memset(priv->stations, 0, sizeof(priv->stations));
 708                 cleared = true;
 709         } else {
 710                 for (i = 0; i < priv->hw_params.max_stations; i++) {
 711                         if (priv->stations[i].used & IWL_STA_UCODE_ACTIVE) {
 712                                 IWL_DEBUG_INFO(priv, "Clearing ucode active for station %d\n", i);
 713                                 priv->stations[i].used &= ~IWL_STA_UCODE_ACTIVE;
 714                                 cleared = true;
 715                         }
 716                 }
 717         }
 718         spin_unlock_irqrestore(&priv->sta_lock, flags_spin);
 719
 720         if (!cleared)
 721                 IWL_DEBUG_INFO(priv, "No active stations found to be cleared\n");
 722 }
 723 EXPORT_SYMBOL(iwl_clear_ucode_stations);
 724
 725 /**
 726  * iwl_restore_stations() - Restore driver known stations to device
 727  *
 728  * All stations considered active by driver, but not present in ucode, is
 729  * restored.
 730  *
 731  * Function sleeps.
 732  */
 733 void iwl_restore_stations(struct iwl_priv *priv)
 734 {
 735         struct iwl_station_entry *station;
 736         unsigned long flags_spin;
 737         int i;
 738         bool found = false;
 739         int ret;
 740
 741         if (!iwl_is_ready(priv)) {
 742                 IWL_DEBUG_INFO(priv, "Not ready yet, not restoring any stations.\n");
 743                 return;
 744         }
 745
 746         IWL_DEBUG_ASSOC(priv, "Restoring all known stations ... start.\n");
 747         spin_lock_irqsave(&priv->sta_lock, flags_spin);
 748         for (i = 0; i < priv->hw_params.max_stations; i++) {
 749                 if ((priv->stations[i].used & IWL_STA_DRIVER_ACTIVE) &&
 750                             !(priv->stations[i].used & IWL_STA_UCODE_ACTIVE)) {
 751                         IWL_DEBUG_ASSOC(priv, "Restoring sta %pM\n",
 752                                         priv->stations[i].sta.sta.addr);
 753                         priv->stations[i].sta.mode = 0;
 754                         priv->stations[i].used |= IWL_STA_UCODE_INPROGRESS;
 755                         found = true;
 756                 }
 757         }
 758
 759         for (i = 0; i < priv->hw_params.max_stations; i++) {
 760                 if ((priv->stations[i].used & IWL_STA_UCODE_INPROGRESS)) {
 761                         spin_unlock_irqrestore(&priv->sta_lock, flags_spin);
 762                         station = &priv->stations[i];
 763                         ret = iwl_send_add_sta(priv, &priv->stations[i].sta, CMD_SYNC);
 764                         if (ret) {
 765                                 IWL_ERR(priv, "Adding station %pM failed.\n",
 766                                         station->sta.sta.addr);
 767                                 spin_lock_irqsave(&priv->sta_lock, flags_spin);
 768                                 priv->stations[i].used &= ~IWL_STA_DRIVER_ACTIVE;
 769                                 priv->stations[i].used &= ~IWL_STA_UCODE_INPROGRESS;
 770                                 spin_unlock_irqrestore(&priv->sta_lock, flags_spin);
 771                         }
 772                         /*
 773                          * Rate scaling has already been initialized, send
 774                          * current LQ command
 775                          */
 776                         if (station->lq)
 777                                 iwl_send_lq_cmd(priv, station->lq, CMD_SYNC, true);
 778                         spin_lock_irqsave(&priv->sta_lock, flags_spin);
 779                         priv->stations[i].used &= ~IWL_STA_UCODE_INPROGRESS;
 780                 }
 781         }
 782
 783         spin_unlock_irqrestore(&priv->sta_lock, flags_spin);
 784         if (!found)
 785                 IWL_DEBUG_INFO(priv, "Restoring all known stations .... no stations to be restored.\n");
 786         else
 787                 IWL_DEBUG_INFO(priv, "Restoring all known stations .... complete.\n");
 788 }
 789 EXPORT_SYMBOL(iwl_restore_stations);
 790
 791 int iwl_get_free_ucode_key_index(struct iwl_priv *priv)
 792 {
 793         int i;
 794
 795         for (i = 0; i < STA_KEY_MAX_NUM; i++)
 796                 if (!test_and_set_bit(i, &priv->ucode_key_table))
 797                         return i;
 798
 799         return WEP_INVALID_OFFSET;
 800 }
 801 EXPORT_SYMBOL(iwl_get_free_ucode_key_index);
 802
 803 static int iwl_send_static_wepkey_cmd(struct iwl_priv *priv, u8 send_if_empty)
 804 {
 805         int i, not_empty = 0;
 806         u8 buff[sizeof(struct iwl_wep_cmd) +
 807                 sizeof(struct iwl_wep_key) * WEP_KEYS_MAX];
 808         struct iwl_wep_cmd *wep_cmd = (struct iwl_wep_cmd *)buff;
 809         size_t cmd_size  = sizeof(struct iwl_wep_cmd);
 810         struct iwl_host_cmd cmd = {
 811                 .id = REPLY_WEPKEY,
 812                 .data = wep_cmd,
 813                 .flags = CMD_SYNC,
 814         };
 815
 816         might_sleep();
 817
 818         memset(wep_cmd, 0, cmd_size +
 819                         (sizeof(struct iwl_wep_key) * WEP_KEYS_MAX));
 820
 821         for (i = 0; i < WEP_KEYS_MAX ; i++) {
 822                 wep_cmd->key[i].key_index = i;
 823                 if (priv->wep_keys[i].key_size) {
 824                         wep_cmd->key[i].key_offset = i;
 825                         not_empty = 1;
 826                 } else {
 827                         wep_cmd->key[i].key_offset = WEP_INVALID_OFFSET;
 828                 }
 829
 830                 wep_cmd->key[i].key_size = priv->wep_keys[i].key_size;
 831                 memcpy(&wep_cmd->key[i].key[3], priv->wep_keys[i].key,
 832                                 priv->wep_keys[i].key_size);
 833         }
 834
 835         wep_cmd->global_key_type = WEP_KEY_WEP_TYPE;
 836         wep_cmd->num_keys = WEP_KEYS_MAX;
 837
 838         cmd_size += sizeof(struct iwl_wep_key) * WEP_KEYS_MAX;
 839
 840         cmd.len = cmd_size;
 841
 842         if (not_empty || send_if_empty)
 843                 return iwl_send_cmd(priv, &cmd);
 844         else
 845                 return 0;
 846 }
 847
 848 int iwl_restore_default_wep_keys(struct iwl_priv *priv)
 849 {
 850         WARN_ON(!mutex_is_locked(&priv->mutex));
 851
 852         return iwl_send_static_wepkey_cmd(priv, 0);
 853 }
 854 EXPORT_SYMBOL(iwl_restore_default_wep_keys);
 855
 856 int iwl_remove_default_wep_key(struct iwl_priv *priv,
 857                                struct ieee80211_key_conf *keyconf)
 858 {
 859         int ret;
 860
 861         WARN_ON(!mutex_is_locked(&priv->mutex));
 862
 863         IWL_DEBUG_WEP(priv, "Removing default WEP key: idx=%d\n",
 864                       keyconf->keyidx);
 865
 866         memset(&priv->wep_keys[keyconf->keyidx], 0, sizeof(priv->wep_keys[0]));
 867         if (iwl_is_rfkill(priv)) {
 868                 IWL_DEBUG_WEP(priv, "Not sending REPLY_WEPKEY command due to RFKILL.\n");
 869                 /* but keys in device are clear anyway so return success */
 870                 return 0;
 871         }
 872         ret = iwl_send_static_wepkey_cmd(priv, 1);
 873         IWL_DEBUG_WEP(priv, "Remove default WEP key: idx=%d ret=%d\n",
 874                       keyconf->keyidx, ret);
 875
 876         return ret;
 877 }
 878 EXPORT_SYMBOL(iwl_remove_default_wep_key);
 879
 880 int iwl_set_default_wep_key(struct iwl_priv *priv,
 881                             struct ieee80211_key_conf *keyconf)
 882 {
 883         int ret;
 884
 885         WARN_ON(!mutex_is_locked(&priv->mutex));
 886
 887         if (keyconf->keylen != WEP_KEY_LEN_128 &&
 888             keyconf->keylen != WEP_KEY_LEN_64) {
 889                 IWL_DEBUG_WEP(priv, "Bad WEP key length %d\n", keyconf->keylen);
 890                 return -EINVAL;
 891         }
 892
 893         keyconf->flags &= ~IEEE80211_KEY_FLAG_GENERATE_IV;
 894         keyconf->hw_key_idx = HW_KEY_DEFAULT;
 895         priv->stations[IWL_AP_ID].keyinfo.alg = ALG_WEP;
 896
 897         priv->wep_keys[keyconf->keyidx].key_size = keyconf->keylen;
 898         memcpy(&priv->wep_keys[keyconf->keyidx].key, &keyconf->key,
 899                                                         keyconf->keylen);
 900
 901         ret = iwl_send_static_wepkey_cmd(priv, 0);
 902         IWL_DEBUG_WEP(priv, "Set default WEP key: len=%d idx=%d ret=%d\n",
 903                 keyconf->keylen, keyconf->keyidx, ret);
 904
 905         return ret;
 906 }
 907 EXPORT_SYMBOL(iwl_set_default_wep_key);
 908
 909 static int iwl_set_wep_dynamic_key_info(struct iwl_priv *priv,
 910                                 struct ieee80211_key_conf *keyconf,
 911                                 u8 sta_id)
 912 {
 913         unsigned long flags;
 914         __le16 key_flags = 0;
 915         int ret;
 916
 917         keyconf->flags &= ~IEEE80211_KEY_FLAG_GENERATE_IV;
 918
 919         key_flags |= (STA_KEY_FLG_WEP | STA_KEY_FLG_MAP_KEY_MSK);
 920         key_flags |= cpu_to_le16(keyconf->keyidx << STA_KEY_FLG_KEYID_POS);
 921         key_flags &= ~STA_KEY_FLG_INVALID;
 922
 923         if (keyconf->keylen == WEP_KEY_LEN_128)
 924                 key_flags |= STA_KEY_FLG_KEY_SIZE_MSK;
 925
 926         if (sta_id == priv->hw_params.bcast_sta_id)
 927                 key_flags |= STA_KEY_MULTICAST_MSK;
 928
 929         spin_lock_irqsave(&priv->sta_lock, flags);
 930
 931         priv->stations[sta_id].keyinfo.alg = keyconf->alg;
 932         priv->stations[sta_id].keyinfo.keylen = keyconf->keylen;
 933         priv->stations[sta_id].keyinfo.keyidx = keyconf->keyidx;
 934
 935         memcpy(priv->stations[sta_id].keyinfo.key,
 936                                 keyconf->key, keyconf->keylen);
 937
 938         memcpy(&priv->stations[sta_id].sta.key.key[3],
 939                                 keyconf->key, keyconf->keylen);
 940
 941         if ((priv->stations[sta_id].sta.key.key_flags & STA_KEY_FLG_ENCRYPT_MSK)
 942                         == STA_KEY_FLG_NO_ENC)
 943                 priv->stations[sta_id].sta.key.key_offset =
 944                                  iwl_get_free_ucode_key_index(priv);
 945         /* else, we are overriding an existing key => no need to allocated room
 946          * in uCode. */
 947
 948         WARN(priv->stations[sta_id].sta.key.key_offset == WEP_INVALID_OFFSET,
 949                 "no space for a new key");
 950
 951         priv->stations[sta_id].sta.key.key_flags = key_flags;
 952         priv->stations[sta_id].sta.sta.modify_mask = STA_MODIFY_KEY_MASK;
 953         priv->stations[sta_id].sta.mode = STA_CONTROL_MODIFY_MSK;
 954
 955         ret = iwl_send_add_sta(priv, &priv->stations[sta_id].sta, CMD_ASYNC);
 956
 957         spin_unlock_irqrestore(&priv->sta_lock, flags);
 958
 959         return ret;
 960 }
 961
 962 static int iwl_set_ccmp_dynamic_key_info(struct iwl_priv *priv,
 963                                    struct ieee80211_key_conf *keyconf,
 964                                    u8 sta_id)
 965 {
 966         unsigned long flags;
 967         __le16 key_flags = 0;
 968         int ret;
 969
 970         key_flags |= (STA_KEY_FLG_CCMP | STA_KEY_FLG_MAP_KEY_MSK);
 971         key_flags |= cpu_to_le16(keyconf->keyidx << STA_KEY_FLG_KEYID_POS);
 972         key_flags &= ~STA_KEY_FLG_INVALID;
 973
 974         if (sta_id == priv->hw_params.bcast_sta_id)
 975                 key_flags |= STA_KEY_MULTICAST_MSK;
 976
 977         keyconf->flags |= IEEE80211_KEY_FLAG_GENERATE_IV;
 978
 979         spin_lock_irqsave(&priv->sta_lock, flags);
 980         priv->stations[sta_id].keyinfo.alg = keyconf->alg;
 981         priv->stations[sta_id].keyinfo.keylen = keyconf->keylen;
 982
 983         memcpy(priv->stations[sta_id].keyinfo.key, keyconf->key,
 984                keyconf->keylen);
 985
 986         memcpy(priv->stations[sta_id].sta.key.key, keyconf->key,
 987                keyconf->keylen);
 988
 989         if ((priv->stations[sta_id].sta.key.key_flags & STA_KEY_FLG_ENCRYPT_MSK)
 990                         == STA_KEY_FLG_NO_ENC)
 991                 priv->stations[sta_id].sta.key.key_offset =
 992                                  iwl_get_free_ucode_key_index(priv);
 993         /* else, we are overriding an existing key => no need to allocated room
 994          * in uCode. */
 995
 996         WARN(priv->stations[sta_id].sta.key.key_offset == WEP_INVALID_OFFSET,
 997                 "no space for a new key");
 998
 999         priv->stations[sta_id].sta.key.key_flags = key_flags;
1000         priv->stations[sta_id].sta.sta.modify_mask = STA_MODIFY_KEY_MASK;
1001         priv->stations[sta_id].sta.mode = STA_CONTROL_MODIFY_MSK;
1002
1003         ret = iwl_send_add_sta(priv, &priv->stations[sta_id].sta, CMD_ASYNC);
1004
1005         spin_unlock_irqrestore(&priv->sta_lock, flags);
1006
1007         return ret;
1008 }
1009
1010 static int iwl_set_tkip_dynamic_key_info(struct iwl_priv *priv,
1011                                    struct ieee80211_key_conf *keyconf,
1012                                    u8 sta_id)
1013 {
1014         unsigned long flags;
1015         int ret = 0;
1016         __le16 key_flags = 0;
1017
1018         key_flags |= (STA_KEY_FLG_TKIP | STA_KEY_FLG_MAP_KEY_MSK);
1019         key_flags |= cpu_to_le16(keyconf->keyidx << STA_KEY_FLG_KEYID_POS);
1020         key_flags &= ~STA_KEY_FLG_INVALID;
1021
1022         if (sta_id == priv->hw_params.bcast_sta_id)
1023                 key_flags |= STA_KEY_MULTICAST_MSK;
1024
1025         keyconf->flags |= IEEE80211_KEY_FLAG_GENERATE_IV;
1026         keyconf->flags |= IEEE80211_KEY_FLAG_GENERATE_MMIC;
1027
1028         spin_lock_irqsave(&priv->sta_lock, flags);
1029
1030         priv->stations[sta_id].keyinfo.alg = keyconf->alg;
1031         priv->stations[sta_id].keyinfo.keylen = 16;
1032
1033         if ((priv->stations[sta_id].sta.key.key_flags & STA_KEY_FLG_ENCRYPT_MSK)
1034                         == STA_KEY_FLG_NO_ENC)
1035                 priv->stations[sta_id].sta.key.key_offset =
1036                                  iwl_get_free_ucode_key_index(priv);
1037         /* else, we are overriding an existing key => no need to allocated room
1038          * in uCode. */
1039
1040         WARN(priv->stations[sta_id].sta.key.key_offset == WEP_INVALID_OFFSET,
1041                 "no space for a new key");
1042
1043         priv->stations[sta_id].sta.key.key_flags = key_flags;
1044
1045
1046         /* This copy is acutally not needed: we get the key with each TX */
1047         memcpy(priv->stations[sta_id].keyinfo.key, keyconf->key, 16);
1048
1049         memcpy(priv->stations[sta_id].sta.key.key, keyconf->key, 16);
1050
1051         spin_unlock_irqrestore(&priv->sta_lock, flags);
1052
1053         return ret;
1054 }
1055
1056 void iwl_update_tkip_key(struct iwl_priv *priv,
1057                         struct ieee80211_key_conf *keyconf,
1058                         const u8 *addr, u32 iv32, u16 *phase1key)
1059 {
1060         u8 sta_id = IWL_INVALID_STATION;
1061         unsigned long flags;
1062         int i;
1063
1064         sta_id = iwl_find_station(priv, addr);
1065         if (sta_id == IWL_INVALID_STATION) {
1066                 IWL_DEBUG_MAC80211(priv, "leave - %pM not in station map.\n",
1067                                    addr);
1068                 return;
1069         }
1070
1071         if (iwl_scan_cancel(priv)) {
1072                 /* cancel scan failed, just live w/ bad key and rely
1073                    briefly on SW decryption */
1074                 return;
1075         }
1076
1077         spin_lock_irqsave(&priv->sta_lock, flags);
1078
1079         priv->stations[sta_id].sta.key.tkip_rx_tsc_byte2 = (u8) iv32;
1080
1081         for (i = 0; i < 5; i++)
1082                 priv->stations[sta_id].sta.key.tkip_rx_ttak[i] =
1083                         cpu_to_le16(phase1key[i]);
1084
1085         priv->stations[sta_id].sta.sta.modify_mask = STA_MODIFY_KEY_MASK;
1086         priv->stations[sta_id].sta.mode = STA_CONTROL_MODIFY_MSK;
1087
1088         iwl_send_add_sta(priv, &priv->stations[sta_id].sta, CMD_ASYNC);
1089
1090         spin_unlock_irqrestore(&priv->sta_lock, flags);
1091
1092 }
1093 EXPORT_SYMBOL(iwl_update_tkip_key);
1094
1095 int iwl_remove_dynamic_key(struct iwl_priv *priv,
1096                                 struct ieee80211_key_conf *keyconf,
1097                                 u8 sta_id)
1098 {
1099         unsigned long flags;
1100         int ret = 0;
1101         u16 key_flags;
1102         u8 keyidx;
1103
1104         priv->key_mapping_key--;
1105
1106         spin_lock_irqsave(&priv->sta_lock, flags);
1107         key_flags = le16_to_cpu(priv->stations[sta_id].sta.key.key_flags);
1108         keyidx = (key_flags >> STA_KEY_FLG_KEYID_POS) & 0x3;
1109
1110         IWL_DEBUG_WEP(priv, "Remove dynamic key: idx=%d sta=%d\n",
1111                       keyconf->keyidx, sta_id);
1112
1113         if (keyconf->keyidx != keyidx) {
1114                 /* We need to remove a key with index different that the one
1115                  * in the uCode. This means that the key we need to remove has
1116                  * been replaced by another one with different index.
1117                  * Don't do anything and return ok
1118                  */
1119                 spin_unlock_irqrestore(&priv->sta_lock, flags);
1120                 return 0;
1121         }
1122
1123         if (priv->stations[sta_id].sta.key.key_offset == WEP_INVALID_OFFSET) {
1124                 IWL_WARN(priv, "Removing wrong key %d 0x%x\n",
1125                             keyconf->keyidx, key_flags);
1126                 spin_unlock_irqrestore(&priv->sta_lock, flags);
1127                 return 0;
1128         }
1129
1130         if (!test_and_clear_bit(priv->stations[sta_id].sta.key.key_offset,
1131                 &priv->ucode_key_table))
1132                 IWL_ERR(priv, "index %d not used in uCode key table.\n",
1133                         priv->stations[sta_id].sta.key.key_offset);
1134         memset(&priv->stations[sta_id].keyinfo, 0,
1135                                         sizeof(struct iwl_hw_key));
1136         memset(&priv->stations[sta_id].sta.key, 0,
1137                                         sizeof(struct iwl4965_keyinfo));
1138         priv->stations[sta_id].sta.key.key_flags =
1139                         STA_KEY_FLG_NO_ENC | STA_KEY_FLG_INVALID;
1140         priv->stations[sta_id].sta.key.key_offset = WEP_INVALID_OFFSET;
1141         priv->stations[sta_id].sta.sta.modify_mask = STA_MODIFY_KEY_MASK;
1142         priv->stations[sta_id].sta.mode = STA_CONTROL_MODIFY_MSK;
1143
1144         if (iwl_is_rfkill(priv)) {
1145                 IWL_DEBUG_WEP(priv, "Not sending REPLY_ADD_STA command because RFKILL enabled.\n");
1146                 spin_unlock_irqrestore(&priv->sta_lock, flags);
1147                 return 0;
1148         }
1149         ret =  iwl_send_add_sta(priv, &priv->stations[sta_id].sta, CMD_ASYNC);
1150         spin_unlock_irqrestore(&priv->sta_lock, flags);
1151         return ret;
1152 }
1153 EXPORT_SYMBOL(iwl_remove_dynamic_key);
1154
1155 int iwl_set_dynamic_key(struct iwl_priv *priv,
1156                                 struct ieee80211_key_conf *keyconf, u8 sta_id)
1157 {
1158         int ret;
1159
1160         priv->key_mapping_key++;
1161         keyconf->hw_key_idx = HW_KEY_DYNAMIC;
1162
1163         switch (keyconf->alg) {
1164         case ALG_CCMP:
1165                 ret = iwl_set_ccmp_dynamic_key_info(priv, keyconf, sta_id);
1166                 break;
1167         case ALG_TKIP:
1168                 ret = iwl_set_tkip_dynamic_key_info(priv, keyconf, sta_id);
1169                 break;
1170         case ALG_WEP:
1171                 ret = iwl_set_wep_dynamic_key_info(priv, keyconf, sta_id);
1172                 break;
1173         default:
1174                 IWL_ERR(priv,
1175                         "Unknown alg: %s alg = %d\n", __func__, keyconf->alg);
1176                 ret = -EINVAL;
1177         }
1178
1179         IWL_DEBUG_WEP(priv, "Set dynamic key: alg= %d len=%d idx=%d sta=%d ret=%d\n",
1180                       keyconf->alg, keyconf->keylen, keyconf->keyidx,
1181                       sta_id, ret);
1182
1183         return ret;
1184 }
1185 EXPORT_SYMBOL(iwl_set_dynamic_key);
1186
1187 #ifdef CONFIG_IWLWIFI_DEBUG
1188 static void iwl_dump_lq_cmd(struct iwl_priv *priv,
1189                            struct iwl_link_quality_cmd *lq)
1190 {
1191         int i;
1192         IWL_DEBUG_RATE(priv, "lq station id 0x%x\n", lq->sta_id);
1193         IWL_DEBUG_RATE(priv, "lq ant 0x%X 0x%X\n",
1194                        lq->general_params.single_stream_ant_msk,
1195                        lq->general_params.dual_stream_ant_msk);
1196
1197         for (i = 0; i < LINK_QUAL_MAX_RETRY_NUM; i++)
1198                 IWL_DEBUG_RATE(priv, "lq index %d 0x%X\n",
1199                                i, lq->rs_table[i].rate_n_flags);
1200 }
1201 #else
1202 static inline void iwl_dump_lq_cmd(struct iwl_priv *priv,
1203                                    struct iwl_link_quality_cmd *lq)
1204 {
1205 }
1206 #endif
1207
1208 /**
1209  * iwl_send_lq_cmd() - Send link quality command
1210  * @init: This command is sent as part of station initialization right
1211  *        after station has been added.
1212  *
1213  * The link quality command is sent as the last step of station creation.
1214  * This is the special case in which init is set and we call a callback in
1215  * this case to clear the state indicating that station creation is in
1216  * progress.
1217  */
1218 int iwl_send_lq_cmd(struct iwl_priv *priv,
1219                     struct iwl_link_quality_cmd *lq, u8 flags, bool init)
1220 {
1221         int ret = 0;
1222         unsigned long flags_spin;
1223
1224         struct iwl_host_cmd cmd = {
1225                 .id = REPLY_TX_LINK_QUALITY_CMD,
1226                 .len = sizeof(struct iwl_link_quality_cmd),
1227                 .flags = flags,
1228                 .data = lq,
1229         };
1230
1231         if (WARN_ON(lq->sta_id == IWL_INVALID_STATION))
1232                 return -EINVAL;
1233
1234         iwl_dump_lq_cmd(priv, lq);
1235         BUG_ON(init && (cmd.flags & CMD_ASYNC));
1236
1237         ret = iwl_send_cmd(priv, &cmd);
1238
1239         if (cmd.flags & CMD_ASYNC)
1240                 return ret;
1241
1242         if (init) {
1243                 IWL_DEBUG_INFO(priv, "init LQ command complete, clearing sta addition status for sta %d\n",
1244                                lq->sta_id);
1245                 spin_lock_irqsave(&priv->sta_lock, flags_spin);
1246                 priv->stations[lq->sta_id].used &= ~IWL_STA_UCODE_INPROGRESS;
1247                 spin_unlock_irqrestore(&priv->sta_lock, flags_spin);
1248         }
1249         return ret;
1250 }
1251 EXPORT_SYMBOL(iwl_send_lq_cmd);
1252
1253 /**
1254  * iwl_add_bcast_station - add broadcast station into station table.
1255  */
1256 int iwl_add_bcast_station(struct iwl_priv *priv)
1257 {
1258         IWL_DEBUG_INFO(priv, "Adding broadcast station to station table\n");
1259         return iwl_add_local_station(priv, iwl_bcast_addr, true);
1260 }
1261 EXPORT_SYMBOL(iwl_add_bcast_station);
1262
1263 /**
1264  * iwl3945_add_bcast_station - add broadcast station into station table.
1265  */
1266 int iwl3945_add_bcast_station(struct iwl_priv *priv)
1267 {
1268         int ret;
1269
1270         IWL_DEBUG_INFO(priv, "Adding broadcast station to station table\n");
1271         ret = iwl_add_local_station(priv, iwl_bcast_addr, false);
1272         /*
1273          * It is assumed that when station is added more initialization
1274          * needs to be done, but for 3945 it is not the case and we can
1275          * just release station table access right here.
1276          */
1277         priv->stations[priv->hw_params.bcast_sta_id].used &= ~IWL_STA_UCODE_INPROGRESS;
1278         return ret;
1279
1280 }
1281 EXPORT_SYMBOL(iwl3945_add_bcast_station);
1282
1283 /**
1284  * iwl_get_sta_id - Find station's index within station table
1285  *
1286  * If new IBSS station, create new entry in station table
1287  */
1288 int iwl_get_sta_id(struct iwl_priv *priv, struct ieee80211_hdr *hdr)
1289 {
1290         int sta_id;
1291         __le16 fc = hdr->frame_control;
1292
1293         /* If this frame is broadcast or management, use broadcast station id */
1294         if (!ieee80211_is_data(fc) ||  is_multicast_ether_addr(hdr->addr1))
1295                 return priv->hw_params.bcast_sta_id;
1296
1297         switch (priv->iw_mode) {
1298
1299         /* If we are a client station in a BSS network, use the special
1300          * AP station entry (that's the only station we communicate with) */
1301         case NL80211_IFTYPE_STATION:
1302                 /*
1303                  * If addition of station not complete yet, which means
1304                  * that rate scaling has not been initialized, then return
1305                  * the broadcast station.
1306                  */
1307                 if (!(priv->stations[IWL_AP_ID].used & IWL_STA_UCODE_ACTIVE))
1308                         return priv->hw_params.bcast_sta_id;
1309                 return IWL_AP_ID;
1310
1311         /* If we are an AP, then find the station, or use BCAST */
1312         case NL80211_IFTYPE_AP:
1313                 sta_id = iwl_find_station(priv, hdr->addr1);
1314                 if (sta_id != IWL_INVALID_STATION)
1315                         return sta_id;
1316                 return priv->hw_params.bcast_sta_id;
1317
1318         /* If this frame is going out to an IBSS network, find the station,
1319          * or create a new station table entry */
1320         case NL80211_IFTYPE_ADHOC:
1321                 sta_id = iwl_find_station(priv, hdr->addr1);
1322                 if (sta_id != IWL_INVALID_STATION)
1323                         return sta_id;
1324
1325                 IWL_DEBUG_DROP(priv, "Station %pM not in station map. "
1326                                "Defaulting to broadcast...\n",
1327                                hdr->addr1);
1328                 iwl_print_hex_dump(priv, IWL_DL_DROP, (u8 *) hdr, sizeof(*hdr));
1329                 return priv->hw_params.bcast_sta_id;
1330
1331         default:
1332                 IWL_WARN(priv, "Unknown mode of operation: %d\n",
1333                         priv->iw_mode);
1334                 return priv->hw_params.bcast_sta_id;
1335         }
1336 }
1337 EXPORT_SYMBOL(iwl_get_sta_id);
1338
1339 /**
1340  * iwl_sta_tx_modify_enable_tid - Enable Tx for this TID in station table
1341  */
1342 void iwl_sta_tx_modify_enable_tid(struct iwl_priv *priv, int sta_id, int tid)
1343 {
1344         unsigned long flags;
1345
1346         /* Remove "disable" flag, to enable Tx for this TID */
1347         spin_lock_irqsave(&priv->sta_lock, flags);
1348         priv->stations[sta_id].sta.sta.modify_mask = STA_MODIFY_TID_DISABLE_TX;
1349         priv->stations[sta_id].sta.tid_disable_tx &= cpu_to_le16(~(1 << tid));
1350         priv->stations[sta_id].sta.mode = STA_CONTROL_MODIFY_MSK;
1351         spin_unlock_irqrestore(&priv->sta_lock, flags);
1352
1353         iwl_send_add_sta(priv, &priv->stations[sta_id].sta, CMD_ASYNC);
1354 }
1355 EXPORT_SYMBOL(iwl_sta_tx_modify_enable_tid);
1356
1357 int iwl_sta_rx_agg_start(struct iwl_priv *priv,
1358                          const u8 *addr, int tid, u16 ssn)
1359 {
1360         unsigned long flags;
1361         int sta_id;
1362
1363         sta_id = iwl_find_station(priv, addr);
1364         if (sta_id == IWL_INVALID_STATION)
1365                 return -ENXIO;
1366
1367         spin_lock_irqsave(&priv->sta_lock, flags);
1368         priv->stations[sta_id].sta.station_flags_msk = 0;
1369         priv->stations[sta_id].sta.sta.modify_mask = STA_MODIFY_ADDBA_TID_MSK;
1370         priv->stations[sta_id].sta.add_immediate_ba_tid = (u8)tid;
1371         priv->stations[sta_id].sta.add_immediate_ba_ssn = cpu_to_le16(ssn);
1372         priv->stations[sta_id].sta.mode = STA_CONTROL_MODIFY_MSK;
1373         spin_unlock_irqrestore(&priv->sta_lock, flags);
1374
1375         return iwl_send_add_sta(priv, &priv->stations[sta_id].sta,
1376                                         CMD_ASYNC);
1377 }
1378 EXPORT_SYMBOL(iwl_sta_rx_agg_start);
1379
1380 int iwl_sta_rx_agg_stop(struct iwl_priv *priv, const u8 *addr, int tid)
1381 {
1382         unsigned long flags;
1383         int sta_id;
1384
1385         sta_id = iwl_find_station(priv, addr);
1386         if (sta_id == IWL_INVALID_STATION) {
1387                 IWL_ERR(priv, "Invalid station for AGG tid %d\n", tid);
1388                 return -ENXIO;
1389         }
1390
1391         spin_lock_irqsave(&priv->sta_lock, flags);
1392         priv->stations[sta_id].sta.station_flags_msk = 0;
1393         priv->stations[sta_id].sta.sta.modify_mask = STA_MODIFY_DELBA_TID_MSK;
1394         priv->stations[sta_id].sta.remove_immediate_ba_tid = (u8)tid;
1395         priv->stations[sta_id].sta.mode = STA_CONTROL_MODIFY_MSK;
1396         spin_unlock_irqrestore(&priv->sta_lock, flags);
1397
1398         return iwl_send_add_sta(priv, &priv->stations[sta_id].sta,
1399                                         CMD_ASYNC);
1400 }
1401 EXPORT_SYMBOL(iwl_sta_rx_agg_stop);
1402
1403 void iwl_sta_modify_ps_wake(struct iwl_priv *priv, int sta_id)
1404 {
1405         unsigned long flags;
1406
1407         spin_lock_irqsave(&priv->sta_lock, flags);
1408         priv->stations[sta_id].sta.station_flags &= ~STA_FLG_PWR_SAVE_MSK;
1409         priv->stations[sta_id].sta.station_flags_msk = STA_FLG_PWR_SAVE_MSK;
1410         priv->stations[sta_id].sta.sta.modify_mask = 0;
1411         priv->stations[sta_id].sta.sleep_tx_count = 0;
1412         priv->stations[sta_id].sta.mode = STA_CONTROL_MODIFY_MSK;
1413         spin_unlock_irqrestore(&priv->sta_lock, flags);
1414
1415         iwl_send_add_sta(priv, &priv->stations[sta_id].sta, CMD_ASYNC);
1416 }
1417 EXPORT_SYMBOL(iwl_sta_modify_ps_wake);
1418
1419 void iwl_sta_modify_sleep_tx_count(struct iwl_priv *priv, int sta_id, int cnt)
1420 {
1421         unsigned long flags;
1422
1423         spin_lock_irqsave(&priv->sta_lock, flags);
1424         priv->stations[sta_id].sta.station_flags |= STA_FLG_PWR_SAVE_MSK;
1425         priv->stations[sta_id].sta.station_flags_msk = STA_FLG_PWR_SAVE_MSK;
1426         priv->stations[sta_id].sta.sta.modify_mask =
1427                                         STA_MODIFY_SLEEP_TX_COUNT_MSK;
1428         priv->stations[sta_id].sta.sleep_tx_count = cpu_to_le16(cnt);
1429         priv->stations[sta_id].sta.mode = STA_CONTROL_MODIFY_MSK;
1430         spin_unlock_irqrestore(&priv->sta_lock, flags);
1431
1432         iwl_send_add_sta(priv, &priv->stations[sta_id].sta, CMD_ASYNC);
1433 }
1434 EXPORT_SYMBOL(iwl_sta_modify_sleep_tx_count);
1435
1436 int iwl_mac_sta_remove(struct ieee80211_hw *hw,
1437                                struct ieee80211_vif *vif,
1438                                struct ieee80211_sta *sta)
1439 {
1440         int ret;
1441         struct iwl_priv *priv = hw->priv;
1442         IWL_DEBUG_INFO(priv, "received request to remove station %pM\n",
1443                         sta->addr);
1444         ret = iwl_remove_station(priv, sta->addr);
1445         if (ret)
1446                 IWL_ERR(priv, "Error removing station %pM\n",
1447                         sta->addr);
1448         return ret;
1449 }
1450 EXPORT_SYMBOL(iwl_mac_sta_remove);