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 int iwl_get_ra_sta_id(struct iwl_priv *priv, struct ieee80211_hdr *hdr)
  84 {
  85         if (priv->iw_mode == NL80211_IFTYPE_STATION) {
  86                 return IWL_AP_ID;
  87         } else {
  88                 u8 *da = ieee80211_get_DA(hdr);
  89                 return iwl_find_station(priv, da);
  90         }
  91 }
  92 EXPORT_SYMBOL(iwl_get_ra_sta_id);
  93
  94 /* priv->sta_lock must be held */
  95 static void iwl_sta_ucode_activate(struct iwl_priv *priv, u8 sta_id)
  96 {
  97
  98         if (!(priv->stations[sta_id].used & IWL_STA_DRIVER_ACTIVE))
  99                 IWL_ERR(priv, "ACTIVATE a non DRIVER active station id %u addr %pM\n",
 100                         sta_id, priv->stations[sta_id].sta.sta.addr);
 101
 102         if (priv->stations[sta_id].used & IWL_STA_UCODE_ACTIVE) {
 103                 IWL_DEBUG_ASSOC(priv,
 104                                 "STA id %u addr %pM already present in uCode (according to driver)\n",
 105                                 sta_id, priv->stations[sta_id].sta.sta.addr);
 106         } else {
 107                 priv->stations[sta_id].used |= IWL_STA_UCODE_ACTIVE;
 108                 IWL_DEBUG_ASSOC(priv, "Added STA id %u addr %pM to uCode\n",
 109                                 sta_id, priv->stations[sta_id].sta.sta.addr);
 110         }
 111 }
 112
 113 static void iwl_process_add_sta_resp(struct iwl_priv *priv,
 114                                      struct iwl_addsta_cmd *addsta,
 115                                      struct iwl_rx_packet *pkt,
 116                                      bool sync)
 117 {
 118         u8 sta_id = addsta->sta.sta_id;
 119         unsigned long flags;
 120
 121         if (pkt->hdr.flags & IWL_CMD_FAILED_MSK) {
 122                 IWL_ERR(priv, "Bad return from REPLY_ADD_STA (0x%08X)\n",
 123                         pkt->hdr.flags);
 124                 return;
 125         }
 126
 127         IWL_DEBUG_INFO(priv, "Processing response for adding station %u\n",
 128                        sta_id);
 129
 130         spin_lock_irqsave(&priv->sta_lock, flags);
 131
 132         switch (pkt->u.add_sta.status) {
 133         case ADD_STA_SUCCESS_MSK:
 134                 IWL_DEBUG_INFO(priv, "REPLY_ADD_STA PASSED\n");
 135                 iwl_sta_ucode_activate(priv, sta_id);
 136                 break;
 137         case ADD_STA_NO_ROOM_IN_TABLE:
 138                 IWL_ERR(priv, "Adding station %d failed, no room in table.\n",
 139                         sta_id);
 140                 break;
 141         case ADD_STA_NO_BLOCK_ACK_RESOURCE:
 142                 IWL_ERR(priv, "Adding station %d failed, no block ack resource.\n",
 143                         sta_id);
 144                 break;
 145         case ADD_STA_MODIFY_NON_EXIST_STA:
 146                 IWL_ERR(priv, "Attempting to modify non-existing station %d\n",
 147                         sta_id);
 148                 break;
 149         default:
 150                 IWL_DEBUG_ASSOC(priv, "Received REPLY_ADD_STA:(0x%08X)\n",
 151                                 pkt->u.add_sta.status);
 152                 break;
 153         }
 154
 155         IWL_DEBUG_INFO(priv, "%s station id %u addr %pM\n",
 156                        priv->stations[sta_id].sta.mode ==
 157                        STA_CONTROL_MODIFY_MSK ?  "Modified" : "Added",
 158                        sta_id, priv->stations[sta_id].sta.sta.addr);
 159
 160         /*
 161          * XXX: The MAC address in the command buffer is often changed from
 162          * the original sent to the device. That is, the MAC address
 163          * written to the command buffer often is not the same MAC adress
 164          * read from the command buffer when the command returns. This
 165          * issue has not yet been resolved and this debugging is left to
 166          * observe the problem.
 167          */
 168         IWL_DEBUG_INFO(priv, "%s station according to cmd buffer %pM\n",
 169                        priv->stations[sta_id].sta.mode ==
 170                        STA_CONTROL_MODIFY_MSK ? "Modified" : "Added",
 171                        addsta->sta.addr);
 172         spin_unlock_irqrestore(&priv->sta_lock, flags);
 173 }
 174
 175 static void iwl_add_sta_callback(struct iwl_priv *priv,
 176                                  struct iwl_device_cmd *cmd,
 177                                  struct iwl_rx_packet *pkt)
 178 {
 179         struct iwl_addsta_cmd *addsta =
 180                 (struct iwl_addsta_cmd *)cmd->cmd.payload;
 181
 182         iwl_process_add_sta_resp(priv, addsta, pkt, false);
 183
 184 }
 185
 186 int iwl_send_add_sta(struct iwl_priv *priv,
 187                      struct iwl_addsta_cmd *sta, u8 flags)
 188 {
 189         struct iwl_rx_packet *pkt = NULL;
 190         int ret = 0;
 191         u8 data[sizeof(*sta)];
 192         struct iwl_host_cmd cmd = {
 193                 .id = REPLY_ADD_STA,
 194                 .flags = flags,
 195                 .data = data,
 196         };
 197         u8 sta_id __maybe_unused = sta->sta.sta_id;
 198
 199         IWL_DEBUG_INFO(priv, "Adding sta %u (%pM) %ssynchronously\n",
 200                        sta_id, sta->sta.addr, flags & CMD_ASYNC ?  "a" : "");
 201
 202         if (flags & CMD_ASYNC)
 203                 cmd.callback = iwl_add_sta_callback;
 204         else
 205                 cmd.flags |= CMD_WANT_SKB;
 206
 207         cmd.len = priv->cfg->ops->utils->build_addsta_hcmd(sta, data);
 208         ret = iwl_send_cmd(priv, &cmd);
 209
 210         if (ret || (flags & CMD_ASYNC))
 211                 return ret;
 212
 213         if (ret == 0) {
 214                 pkt = (struct iwl_rx_packet *)cmd.reply_page;
 215                 iwl_process_add_sta_resp(priv, sta, pkt, true);
 216         }
 217         iwl_free_pages(priv, cmd.reply_page);
 218
 219         return ret;
 220 }
 221 EXPORT_SYMBOL(iwl_send_add_sta);
 222
 223 static void iwl_set_ht_add_station(struct iwl_priv *priv, u8 index,
 224                                    struct ieee80211_sta_ht_cap *sta_ht_inf)
 225 {
 226         __le32 sta_flags;
 227         u8 mimo_ps_mode;
 228
 229         if (!sta_ht_inf || !sta_ht_inf->ht_supported)
 230                 goto done;
 231
 232         mimo_ps_mode = (sta_ht_inf->cap & IEEE80211_HT_CAP_SM_PS) >> 2;
 233         IWL_DEBUG_ASSOC(priv, "spatial multiplexing power save mode: %s\n",
 234                         (mimo_ps_mode == WLAN_HT_CAP_SM_PS_STATIC) ?
 235                         "static" :
 236                         (mimo_ps_mode == WLAN_HT_CAP_SM_PS_DYNAMIC) ?
 237                         "dynamic" : "disabled");
 238
 239         sta_flags = priv->stations[index].sta.station_flags;
 240
 241         sta_flags &= ~(STA_FLG_RTS_MIMO_PROT_MSK | STA_FLG_MIMO_DIS_MSK);
 242
 243         switch (mimo_ps_mode) {
 244         case WLAN_HT_CAP_SM_PS_STATIC:
 245                 sta_flags |= STA_FLG_MIMO_DIS_MSK;
 246                 break;
 247         case WLAN_HT_CAP_SM_PS_DYNAMIC:
 248                 sta_flags |= STA_FLG_RTS_MIMO_PROT_MSK;
 249                 break;
 250         case WLAN_HT_CAP_SM_PS_DISABLED:
 251                 break;
 252         default:
 253                 IWL_WARN(priv, "Invalid MIMO PS mode %d\n", mimo_ps_mode);
 254                 break;
 255         }
 256
 257         sta_flags |= cpu_to_le32(
 258               (u32)sta_ht_inf->ampdu_factor << STA_FLG_MAX_AGG_SIZE_POS);
 259
 260         sta_flags |= cpu_to_le32(
 261               (u32)sta_ht_inf->ampdu_density << STA_FLG_AGG_MPDU_DENSITY_POS);
 262
 263         if (iwl_is_ht40_tx_allowed(priv, sta_ht_inf))
 264                 sta_flags |= STA_FLG_HT40_EN_MSK;
 265         else
 266                 sta_flags &= ~STA_FLG_HT40_EN_MSK;
 267
 268         priv->stations[index].sta.station_flags = sta_flags;
 269  done:
 270         return;
 271 }
 272
 273 /**
 274  * iwl_prep_station - Prepare station information for addition
 275  *
 276  * should be called with sta_lock held
 277  */
 278 static u8 iwl_prep_station(struct iwl_priv *priv, const u8 *addr,
 279                            bool is_ap,
 280                            struct ieee80211_sta_ht_cap *ht_info)
 281 {
 282         struct iwl_station_entry *station;
 283         int i;
 284         u8 sta_id = IWL_INVALID_STATION;
 285         u16 rate;
 286
 287         if (is_ap)
 288                 sta_id = IWL_AP_ID;
 289         else if (is_broadcast_ether_addr(addr))
 290                 sta_id = priv->hw_params.bcast_sta_id;
 291         else
 292                 for (i = IWL_STA_ID; i < priv->hw_params.max_stations; i++) {
 293                         if (!compare_ether_addr(priv->stations[i].sta.sta.addr,
 294                                                 addr)) {
 295                                 sta_id = i;
 296                                 break;
 297                         }
 298
 299                         if (!priv->stations[i].used &&
 300                             sta_id == IWL_INVALID_STATION)
 301                                 sta_id = i;
 302                 }
 303
 304         /*
 305          * These two conditions have the same outcome, but keep them
 306          * separate
 307          */
 308         if (unlikely(sta_id == IWL_INVALID_STATION))
 309                 return sta_id;
 310
 311         /*
 312          * uCode is not able to deal with multiple requests to add a
 313          * station. Keep track if one is in progress so that we do not send
 314          * another.
 315          */
 316         if (priv->stations[sta_id].used & IWL_STA_UCODE_INPROGRESS) {
 317                 IWL_DEBUG_INFO(priv, "STA %d already in process of being added.\n",
 318                                 sta_id);
 319                 return sta_id;
 320         }
 321
 322         if ((priv->stations[sta_id].used & IWL_STA_DRIVER_ACTIVE) &&
 323             (priv->stations[sta_id].used & IWL_STA_UCODE_ACTIVE) &&
 324             !compare_ether_addr(priv->stations[sta_id].sta.sta.addr, addr)) {
 325                 IWL_DEBUG_ASSOC(priv, "STA %d (%pM) already added, not adding again.\n",
 326                                 sta_id, addr);
 327                 return sta_id;
 328         }
 329
 330         station = &priv->stations[sta_id];
 331         station->used = IWL_STA_DRIVER_ACTIVE;
 332         IWL_DEBUG_ASSOC(priv, "Add STA to driver ID %d: %pM\n",
 333                         sta_id, addr);
 334         priv->num_stations++;
 335
 336         /* Set up the REPLY_ADD_STA command to send to device */
 337         memset(&station->sta, 0, sizeof(struct iwl_addsta_cmd));
 338         memcpy(station->sta.sta.addr, addr, ETH_ALEN);
 339         station->sta.mode = 0;
 340         station->sta.sta.sta_id = sta_id;
 341         station->sta.station_flags = 0;
 342
 343         /* BCAST station and IBSS stations do not work in HT mode */
 344         if (sta_id != priv->hw_params.bcast_sta_id &&
 345             priv->iw_mode != NL80211_IFTYPE_ADHOC)
 346                 iwl_set_ht_add_station(priv, sta_id, ht_info);
 347
 348         /* 3945 only */
 349         rate = (priv->band == IEEE80211_BAND_5GHZ) ?
 350                 IWL_RATE_6M_PLCP : IWL_RATE_1M_PLCP;
 351         /* Turn on both antennas for the station... */
 352         station->sta.rate_n_flags = cpu_to_le16(rate | RATE_MCS_ANT_AB_MSK);
 353
 354         return sta_id;
 355
 356 }
 357
 358 #define STA_WAIT_TIMEOUT (HZ/2)
 359
 360 /**
 361  * iwl_add_station_common -
 362  */
 363 int iwl_add_station_common(struct iwl_priv *priv, const u8 *addr,
 364                                   bool is_ap,
 365                                   struct ieee80211_sta_ht_cap *ht_info,
 366                                   u8 *sta_id_r)
 367 {
 368         struct iwl_station_entry *station;
 369         unsigned long flags_spin;
 370         int ret = 0;
 371         u8 sta_id;
 372
 373         *sta_id_r = 0;
 374         spin_lock_irqsave(&priv->sta_lock, flags_spin);
 375         sta_id = iwl_prep_station(priv, addr, is_ap, ht_info);
 376         if (sta_id == IWL_INVALID_STATION) {
 377                 IWL_ERR(priv, "Unable to prepare station %pM for addition\n",
 378                         addr);
 379                 spin_unlock_irqrestore(&priv->sta_lock, flags_spin);
 380                 return -EINVAL;
 381         }
 382
 383         /*
 384          * uCode is not able to deal with multiple requests to add a
 385          * station. Keep track if one is in progress so that we do not send
 386          * another.
 387          */
 388         if (priv->stations[sta_id].used & IWL_STA_UCODE_INPROGRESS) {
 389                 IWL_DEBUG_INFO(priv, "STA %d already in process of being added.\n",
 390                                sta_id);
 391                 spin_unlock_irqrestore(&priv->sta_lock, flags_spin);
 392                 return -EEXIST;
 393         }
 394
 395         if ((priv->stations[sta_id].used & IWL_STA_DRIVER_ACTIVE) &&
 396             (priv->stations[sta_id].used & IWL_STA_UCODE_ACTIVE)) {
 397                 IWL_DEBUG_ASSOC(priv, "STA %d (%pM) already added, not adding again.\n",
 398                                 sta_id, addr);
 399                 spin_unlock_irqrestore(&priv->sta_lock, flags_spin);
 400                 return -EEXIST;
 401         }
 402
 403         priv->stations[sta_id].used |= IWL_STA_UCODE_INPROGRESS;
 404         station = &priv->stations[sta_id];
 405         spin_unlock_irqrestore(&priv->sta_lock, flags_spin);
 406
 407         /* Add station to device's station table */
 408         ret = iwl_send_add_sta(priv, &station->sta, CMD_SYNC);
 409         if (ret) {
 410                 IWL_ERR(priv, "Adding station %pM failed.\n", station->sta.sta.addr);
 411                 spin_lock_irqsave(&priv->sta_lock, flags_spin);
 412                 priv->stations[sta_id].used &= ~IWL_STA_DRIVER_ACTIVE;
 413                 priv->stations[sta_id].used &= ~IWL_STA_UCODE_INPROGRESS;
 414                 spin_unlock_irqrestore(&priv->sta_lock, flags_spin);
 415         }
 416         *sta_id_r = sta_id;
 417         return ret;
 418 }
 419 EXPORT_SYMBOL(iwl_add_station_common);
 420
 421 static void iwl_sta_init_lq(struct iwl_priv *priv, const u8 *addr, bool is_ap)
 422 {
 423         int i, r;
 424         struct iwl_link_quality_cmd link_cmd = {
 425                 .reserved1 = 0,
 426         };
 427         u32 rate_flags;
 428         int ret = 0;
 429
 430         /* Set up the rate scaling to start at selected rate, fall back
 431          * all the way down to 1M in IEEE order, and then spin on 1M */
 432         if (is_ap)
 433                 r = IWL_RATE_54M_INDEX;
 434         else if (priv->band == IEEE80211_BAND_5GHZ)
 435                 r = IWL_RATE_6M_INDEX;
 436         else
 437                 r = IWL_RATE_1M_INDEX;
 438
 439         for (i = 0; i < LINK_QUAL_MAX_RETRY_NUM; i++) {
 440                 rate_flags = 0;
 441                 if (r >= IWL_FIRST_CCK_RATE && r <= IWL_LAST_CCK_RATE)
 442                         rate_flags |= RATE_MCS_CCK_MSK;
 443
 444                 rate_flags |= first_antenna(priv->hw_params.valid_tx_ant) <<
 445                                 RATE_MCS_ANT_POS;
 446
 447                 link_cmd.rs_table[i].rate_n_flags =
 448                         iwl_hw_set_rate_n_flags(iwl_rates[r].plcp, rate_flags);
 449                 r = iwl_get_prev_ieee_rate(r);
 450         }
 451
 452         link_cmd.general_params.single_stream_ant_msk =
 453                                 first_antenna(priv->hw_params.valid_tx_ant);
 454
 455         link_cmd.general_params.dual_stream_ant_msk =
 456                 priv->hw_params.valid_tx_ant &
 457                 ~first_antenna(priv->hw_params.valid_tx_ant);
 458         if (!link_cmd.general_params.dual_stream_ant_msk) {
 459                 link_cmd.general_params.dual_stream_ant_msk = ANT_AB;
 460         } else if (num_of_ant(priv->hw_params.valid_tx_ant) == 2) {
 461                 link_cmd.general_params.dual_stream_ant_msk =
 462                         priv->hw_params.valid_tx_ant;
 463         }
 464
 465         link_cmd.agg_params.agg_dis_start_th = LINK_QUAL_AGG_DISABLE_START_DEF;
 466         link_cmd.agg_params.agg_time_limit =
 467                 cpu_to_le16(LINK_QUAL_AGG_TIME_LIMIT_DEF);
 468
 469         /* Update the rate scaling for control frame Tx to AP */
 470         link_cmd.sta_id = is_ap ? IWL_AP_ID : priv->hw_params.bcast_sta_id;
 471
 472         ret = iwl_send_cmd_pdu(priv, REPLY_TX_LINK_QUALITY_CMD,
 473                                sizeof(link_cmd), &link_cmd);
 474         if (ret)
 475                 IWL_ERR(priv, "REPLY_TX_LINK_QUALITY_CMD failed (%d)\n", ret);
 476 }
 477
 478 /*
 479  * iwl_add_local_stations - Add stations not requested by mac80211
 480  *
 481  * This will be either the broadcast station or the bssid station needed by
 482  * ad-hoc.
 483  *
 484  * Function sleeps.
 485  */
 486 int iwl_add_local_station(struct iwl_priv *priv, const u8 *addr, bool init_rs)
 487 {
 488         int ret;
 489         u8 sta_id;
 490
 491         ret = iwl_add_station_common(priv, addr, 0, NULL, &sta_id);
 492         if (ret) {
 493                 IWL_ERR(priv, "Unable to add station %pM\n", addr);
 494                 return ret;
 495         }
 496
 497         if (init_rs)
 498                 /* Set up default rate scaling table in device's station table */
 499                 iwl_sta_init_lq(priv, addr, false);
 500         return 0;
 501 }
 502 EXPORT_SYMBOL(iwl_add_local_station);
 503
 504 /**
 505  * iwl_sta_ucode_deactivate - deactivate ucode status for a station
 506  *
 507  * priv->sta_lock must be held
 508  */
 509 static void iwl_sta_ucode_deactivate(struct iwl_priv *priv, u8 sta_id)
 510 {
 511         /* Ucode must be active and driver must be non active */
 512         if (priv->stations[sta_id].used != IWL_STA_UCODE_ACTIVE)
 513                 IWL_ERR(priv, "removed non active STA %u\n", sta_id);
 514
 515         priv->stations[sta_id].used &= ~IWL_STA_UCODE_ACTIVE;
 516
 517         memset(&priv->stations[sta_id], 0, sizeof(struct iwl_station_entry));
 518         IWL_DEBUG_ASSOC(priv, "Removed STA %u\n", sta_id);
 519 }
 520
 521 static int iwl_send_remove_station(struct iwl_priv *priv,
 522                                    struct iwl_station_entry *station)
 523 {
 524         struct iwl_rx_packet *pkt;
 525         int ret;
 526
 527         unsigned long flags_spin;
 528         struct iwl_rem_sta_cmd rm_sta_cmd;
 529
 530         struct iwl_host_cmd cmd = {
 531                 .id = REPLY_REMOVE_STA,
 532                 .len = sizeof(struct iwl_rem_sta_cmd),
 533                 .flags = CMD_SYNC,
 534                 .data = &rm_sta_cmd,
 535         };
 536
 537         memset(&rm_sta_cmd, 0, sizeof(rm_sta_cmd));
 538         rm_sta_cmd.num_sta = 1;
 539         memcpy(&rm_sta_cmd.addr, &station->sta.sta.addr , ETH_ALEN);
 540
 541         cmd.flags |= CMD_WANT_SKB;
 542
 543         ret = iwl_send_cmd(priv, &cmd);
 544
 545         if (ret)
 546                 return ret;
 547
 548         pkt = (struct iwl_rx_packet *)cmd.reply_page;
 549         if (pkt->hdr.flags & IWL_CMD_FAILED_MSK) {
 550                 IWL_ERR(priv, "Bad return from REPLY_REMOVE_STA (0x%08X)\n",
 551                           pkt->hdr.flags);
 552                 ret = -EIO;
 553         }
 554
 555         if (!ret) {
 556                 switch (pkt->u.rem_sta.status) {
 557                 case REM_STA_SUCCESS_MSK:
 558                         spin_lock_irqsave(&priv->sta_lock, flags_spin);
 559                         iwl_sta_ucode_deactivate(priv, station->sta.sta.sta_id);
 560                         spin_unlock_irqrestore(&priv->sta_lock, flags_spin);
 561                         IWL_DEBUG_ASSOC(priv, "REPLY_REMOVE_STA PASSED\n");
 562                         break;
 563                 default:
 564                         ret = -EIO;
 565                         IWL_ERR(priv, "REPLY_REMOVE_STA failed\n");
 566                         break;
 567                 }
 568         }
 569         iwl_free_pages(priv, cmd.reply_page);
 570
 571         return ret;
 572 }
 573
 574 /**
 575  * iwl_remove_station - Remove driver's knowledge of station.
 576  */
 577 static int iwl_remove_station(struct iwl_priv *priv, struct ieee80211_sta *sta)
 578 {
 579         int sta_id = IWL_INVALID_STATION;
 580         int i, ret = -EINVAL;
 581         unsigned long flags;
 582         bool is_ap = priv->iw_mode == NL80211_IFTYPE_STATION;
 583         struct iwl_station_entry *station;
 584
 585         if (!iwl_is_ready(priv)) {
 586                 IWL_DEBUG_INFO(priv,
 587                         "Unable to remove station %pM, device not ready.\n",
 588                         sta->addr);
 589                 /*
 590                  * It is typical for stations to be removed when we are
 591                  * going down. Return success since device will be down
 592                  * soon anyway
 593                  */
 594                 return 0;
 595         }
 596
 597         spin_lock_irqsave(&priv->sta_lock, flags);
 598
 599         if (is_ap)
 600                 sta_id = IWL_AP_ID;
 601         else
 602                 for (i = IWL_STA_ID; i < priv->hw_params.max_stations; i++)
 603                         if (priv->stations[i].used &&
 604                             !compare_ether_addr(priv->stations[i].sta.sta.addr,
 605                                                 sta->addr)) {
 606                                 sta_id = i;
 607                                 break;
 608                         }
 609
 610         if (unlikely(sta_id == IWL_INVALID_STATION))
 611                 goto out;
 612
 613         IWL_DEBUG_ASSOC(priv, "Removing STA from driver:%d  %pM\n",
 614                 sta_id, sta->addr);
 615
 616         if (!(priv->stations[sta_id].used & IWL_STA_DRIVER_ACTIVE)) {
 617                 IWL_DEBUG_INFO(priv, "Removing %pM but non DRIVER active\n",
 618                                 sta->addr);
 619                 goto out;
 620         }
 621
 622         if (!(priv->stations[sta_id].used & IWL_STA_UCODE_ACTIVE)) {
 623                 IWL_DEBUG_INFO(priv, "Removing %pM but non UCODE active\n",
 624                                 sta->addr);
 625                 goto out;
 626         }
 627
 628
 629         priv->stations[sta_id].used &= ~IWL_STA_DRIVER_ACTIVE;
 630
 631         priv->num_stations--;
 632
 633         BUG_ON(priv->num_stations < 0);
 634
 635         station = &priv->stations[sta_id];
 636         spin_unlock_irqrestore(&priv->sta_lock, flags);
 637
 638         ret = iwl_send_remove_station(priv, station);
 639         return ret;
 640 out:
 641         spin_unlock_irqrestore(&priv->sta_lock, flags);
 642         return ret;
 643 }
 644
 645 /**
 646  * iwl_clear_ucode_stations() - clear entire station table driver and/or ucode
 647  * @priv:
 648  * @force: If set then the uCode station table needs to be cleared here. If
 649  *         not set then the uCode station table has already been cleared,
 650  *         for example after sending it a RXON command without ASSOC bit
 651  *         set, and we just need to change driver state here.
 652  */
 653 void iwl_clear_ucode_stations(struct iwl_priv *priv, bool force)
 654 {
 655         int i;
 656         unsigned long flags_spin;
 657         bool cleared = false;
 658
 659         IWL_DEBUG_INFO(priv, "Clearing ucode stations in driver%s\n",
 660                         force ? " and ucode" : "");
 661
 662         if (force) {
 663                 if (!iwl_is_ready(priv)) {
 664                         /*
 665                          * If device is not ready at this point the station
 666                          * table is likely already empty (uCode not ready
 667                          * to receive station requests) or will soon be
 668                          * due to interface going down.
 669                          */
 670                         IWL_DEBUG_INFO(priv, "Unable to remove stations from device - device not ready\n");
 671                 } else {
 672                         iwl_send_cmd_pdu_async(priv, REPLY_REMOVE_ALL_STA, 0, NULL, NULL);
 673                 }
 674         }
 675
 676         spin_lock_irqsave(&priv->sta_lock, flags_spin);
 677         if (force) {
 678                 IWL_DEBUG_INFO(priv, "Clearing all station information in driver\n");
 679                 priv->num_stations = 0;
 680                 memset(priv->stations, 0, sizeof(priv->stations));
 681         } else {
 682                 for (i = 0; i < priv->hw_params.max_stations; i++) {
 683                         if (priv->stations[i].used & IWL_STA_UCODE_ACTIVE) {
 684                                 IWL_DEBUG_INFO(priv, "Clearing ucode active for station %d\n", i);
 685                                 priv->stations[i].used &= ~IWL_STA_UCODE_ACTIVE;
 686                                 cleared = true;
 687                         }
 688                 }
 689         }
 690         spin_unlock_irqrestore(&priv->sta_lock, flags_spin);
 691
 692         if (!cleared)
 693                 IWL_DEBUG_INFO(priv, "No active stations found to be cleared\n");
 694 }
 695 EXPORT_SYMBOL(iwl_clear_ucode_stations);
 696
 697 /**
 698  * iwl_restore_stations() - Restore driver known stations to device
 699  *
 700  * All stations considered active by driver, but not present in ucode, is
 701  * restored.
 702  *
 703  * Function sleeps.
 704  */
 705 void iwl_restore_stations(struct iwl_priv *priv)
 706 {
 707         struct iwl_station_entry *station;
 708         unsigned long flags_spin;
 709         int i;
 710         bool found = false;
 711         int ret;
 712
 713         if (!iwl_is_ready(priv)) {
 714                 IWL_DEBUG_INFO(priv, "Not ready yet, not restoring any stations.\n");
 715                 return;
 716         }
 717
 718         IWL_DEBUG_ASSOC(priv, "Restoring all known stations ... start.\n");
 719         spin_lock_irqsave(&priv->sta_lock, flags_spin);
 720         for (i = 0; i < priv->hw_params.max_stations; i++) {
 721                 if ((priv->stations[i].used & IWL_STA_DRIVER_ACTIVE) &&
 722                             !(priv->stations[i].used & IWL_STA_UCODE_ACTIVE)) {
 723                         IWL_DEBUG_ASSOC(priv, "Restoring sta %pM\n",
 724                                         priv->stations[i].sta.sta.addr);
 725                         priv->stations[i].sta.mode = 0;
 726                         priv->stations[i].used |= IWL_STA_UCODE_INPROGRESS;
 727                         found = true;
 728                 }
 729         }
 730
 731         for (i = 0; i < priv->hw_params.max_stations; i++) {
 732                 if ((priv->stations[i].used & IWL_STA_UCODE_INPROGRESS)) {
 733                         spin_unlock_irqrestore(&priv->sta_lock, flags_spin);
 734                         station = &priv->stations[i];
 735                         ret = iwl_send_add_sta(priv, &priv->stations[i].sta, CMD_SYNC);
 736                         if (ret) {
 737                                 IWL_ERR(priv, "Adding station %pM failed.\n",
 738                                         station->sta.sta.addr);
 739                                 spin_lock_irqsave(&priv->sta_lock, flags_spin);
 740                                 priv->stations[i].used &= ~IWL_STA_DRIVER_ACTIVE;
 741                                 priv->stations[i].used &= ~IWL_STA_UCODE_INPROGRESS;
 742                                 spin_unlock_irqrestore(&priv->sta_lock, flags_spin);
 743                         }
 744                         /*
 745                          * Rate scaling has already been initialized, send
 746                          * current LQ command
 747                          */
 748                         if (station->lq)
 749                                 iwl_send_lq_cmd(priv, station->lq, CMD_SYNC, true);
 750                         spin_lock_irqsave(&priv->sta_lock, flags_spin);
 751                         priv->stations[i].used &= ~IWL_STA_UCODE_INPROGRESS;
 752                 }
 753         }
 754
 755         spin_unlock_irqrestore(&priv->sta_lock, flags_spin);
 756         if (!found)
 757                 IWL_DEBUG_INFO(priv, "Restoring all known stations .... no stations to be restored.\n");
 758         else
 759                 IWL_DEBUG_INFO(priv, "Restoring all known stations .... complete.\n");
 760 }
 761 EXPORT_SYMBOL(iwl_restore_stations);
 762
 763 int iwl_get_free_ucode_key_index(struct iwl_priv *priv)
 764 {
 765         int i;
 766
 767         for (i = 0; i < STA_KEY_MAX_NUM; i++)
 768                 if (!test_and_set_bit(i, &priv->ucode_key_table))
 769                         return i;
 770
 771         return WEP_INVALID_OFFSET;
 772 }
 773 EXPORT_SYMBOL(iwl_get_free_ucode_key_index);
 774
 775 static int iwl_send_static_wepkey_cmd(struct iwl_priv *priv, u8 send_if_empty)
 776 {
 777         int i, not_empty = 0;
 778         u8 buff[sizeof(struct iwl_wep_cmd) +
 779                 sizeof(struct iwl_wep_key) * WEP_KEYS_MAX];
 780         struct iwl_wep_cmd *wep_cmd = (struct iwl_wep_cmd *)buff;
 781         size_t cmd_size  = sizeof(struct iwl_wep_cmd);
 782         struct iwl_host_cmd cmd = {
 783                 .id = REPLY_WEPKEY,
 784                 .data = wep_cmd,
 785                 .flags = CMD_SYNC,
 786         };
 787
 788         might_sleep();
 789
 790         memset(wep_cmd, 0, cmd_size +
 791                         (sizeof(struct iwl_wep_key) * WEP_KEYS_MAX));
 792
 793         for (i = 0; i < WEP_KEYS_MAX ; i++) {
 794                 wep_cmd->key[i].key_index = i;
 795                 if (priv->wep_keys[i].key_size) {
 796                         wep_cmd->key[i].key_offset = i;
 797                         not_empty = 1;
 798                 } else {
 799                         wep_cmd->key[i].key_offset = WEP_INVALID_OFFSET;
 800                 }
 801
 802                 wep_cmd->key[i].key_size = priv->wep_keys[i].key_size;
 803                 memcpy(&wep_cmd->key[i].key[3], priv->wep_keys[i].key,
 804                                 priv->wep_keys[i].key_size);
 805         }
 806
 807         wep_cmd->global_key_type = WEP_KEY_WEP_TYPE;
 808         wep_cmd->num_keys = WEP_KEYS_MAX;
 809
 810         cmd_size += sizeof(struct iwl_wep_key) * WEP_KEYS_MAX;
 811
 812         cmd.len = cmd_size;
 813
 814         if (not_empty || send_if_empty)
 815                 return iwl_send_cmd(priv, &cmd);
 816         else
 817                 return 0;
 818 }
 819
 820 int iwl_restore_default_wep_keys(struct iwl_priv *priv)
 821 {
 822         WARN_ON(!mutex_is_locked(&priv->mutex));
 823
 824         return iwl_send_static_wepkey_cmd(priv, 0);
 825 }
 826 EXPORT_SYMBOL(iwl_restore_default_wep_keys);
 827
 828 int iwl_remove_default_wep_key(struct iwl_priv *priv,
 829                                struct ieee80211_key_conf *keyconf)
 830 {
 831         int ret;
 832
 833         WARN_ON(!mutex_is_locked(&priv->mutex));
 834
 835         IWL_DEBUG_WEP(priv, "Removing default WEP key: idx=%d\n",
 836                       keyconf->keyidx);
 837
 838         memset(&priv->wep_keys[keyconf->keyidx], 0, sizeof(priv->wep_keys[0]));
 839         if (iwl_is_rfkill(priv)) {
 840                 IWL_DEBUG_WEP(priv, "Not sending REPLY_WEPKEY command due to RFKILL.\n");
 841                 /* but keys in device are clear anyway so return success */
 842                 return 0;
 843         }
 844         ret = iwl_send_static_wepkey_cmd(priv, 1);
 845         IWL_DEBUG_WEP(priv, "Remove default WEP key: idx=%d ret=%d\n",
 846                       keyconf->keyidx, ret);
 847
 848         return ret;
 849 }
 850 EXPORT_SYMBOL(iwl_remove_default_wep_key);
 851
 852 int iwl_set_default_wep_key(struct iwl_priv *priv,
 853                             struct ieee80211_key_conf *keyconf)
 854 {
 855         int ret;
 856
 857         WARN_ON(!mutex_is_locked(&priv->mutex));
 858
 859         if (keyconf->keylen != WEP_KEY_LEN_128 &&
 860             keyconf->keylen != WEP_KEY_LEN_64) {
 861                 IWL_DEBUG_WEP(priv, "Bad WEP key length %d\n", keyconf->keylen);
 862                 return -EINVAL;
 863         }
 864
 865         keyconf->flags &= ~IEEE80211_KEY_FLAG_GENERATE_IV;
 866         keyconf->hw_key_idx = HW_KEY_DEFAULT;
 867         priv->stations[IWL_AP_ID].keyinfo.alg = ALG_WEP;
 868
 869         priv->wep_keys[keyconf->keyidx].key_size = keyconf->keylen;
 870         memcpy(&priv->wep_keys[keyconf->keyidx].key, &keyconf->key,
 871                                                         keyconf->keylen);
 872
 873         ret = iwl_send_static_wepkey_cmd(priv, 0);
 874         IWL_DEBUG_WEP(priv, "Set default WEP key: len=%d idx=%d ret=%d\n",
 875                 keyconf->keylen, keyconf->keyidx, ret);
 876
 877         return ret;
 878 }
 879 EXPORT_SYMBOL(iwl_set_default_wep_key);
 880
 881 static int iwl_set_wep_dynamic_key_info(struct iwl_priv *priv,
 882                                 struct ieee80211_key_conf *keyconf,
 883                                 u8 sta_id)
 884 {
 885         unsigned long flags;
 886         __le16 key_flags = 0;
 887         int ret;
 888
 889         keyconf->flags &= ~IEEE80211_KEY_FLAG_GENERATE_IV;
 890
 891         key_flags |= (STA_KEY_FLG_WEP | STA_KEY_FLG_MAP_KEY_MSK);
 892         key_flags |= cpu_to_le16(keyconf->keyidx << STA_KEY_FLG_KEYID_POS);
 893         key_flags &= ~STA_KEY_FLG_INVALID;
 894
 895         if (keyconf->keylen == WEP_KEY_LEN_128)
 896                 key_flags |= STA_KEY_FLG_KEY_SIZE_MSK;
 897
 898         if (sta_id == priv->hw_params.bcast_sta_id)
 899                 key_flags |= STA_KEY_MULTICAST_MSK;
 900
 901         spin_lock_irqsave(&priv->sta_lock, flags);
 902
 903         priv->stations[sta_id].keyinfo.alg = keyconf->alg;
 904         priv->stations[sta_id].keyinfo.keylen = keyconf->keylen;
 905         priv->stations[sta_id].keyinfo.keyidx = keyconf->keyidx;
 906
 907         memcpy(priv->stations[sta_id].keyinfo.key,
 908                                 keyconf->key, keyconf->keylen);
 909
 910         memcpy(&priv->stations[sta_id].sta.key.key[3],
 911                                 keyconf->key, keyconf->keylen);
 912
 913         if ((priv->stations[sta_id].sta.key.key_flags & STA_KEY_FLG_ENCRYPT_MSK)
 914                         == STA_KEY_FLG_NO_ENC)
 915                 priv->stations[sta_id].sta.key.key_offset =
 916                                  iwl_get_free_ucode_key_index(priv);
 917         /* else, we are overriding an existing key => no need to allocated room
 918          * in uCode. */
 919
 920         WARN(priv->stations[sta_id].sta.key.key_offset == WEP_INVALID_OFFSET,
 921                 "no space for a new key");
 922
 923         priv->stations[sta_id].sta.key.key_flags = key_flags;
 924         priv->stations[sta_id].sta.sta.modify_mask = STA_MODIFY_KEY_MASK;
 925         priv->stations[sta_id].sta.mode = STA_CONTROL_MODIFY_MSK;
 926
 927         ret = iwl_send_add_sta(priv, &priv->stations[sta_id].sta, CMD_ASYNC);
 928
 929         spin_unlock_irqrestore(&priv->sta_lock, flags);
 930
 931         return ret;
 932 }
 933
 934 static int iwl_set_ccmp_dynamic_key_info(struct iwl_priv *priv,
 935                                    struct ieee80211_key_conf *keyconf,
 936                                    u8 sta_id)
 937 {
 938         unsigned long flags;
 939         __le16 key_flags = 0;
 940         int ret;
 941
 942         key_flags |= (STA_KEY_FLG_CCMP | STA_KEY_FLG_MAP_KEY_MSK);
 943         key_flags |= cpu_to_le16(keyconf->keyidx << STA_KEY_FLG_KEYID_POS);
 944         key_flags &= ~STA_KEY_FLG_INVALID;
 945
 946         if (sta_id == priv->hw_params.bcast_sta_id)
 947                 key_flags |= STA_KEY_MULTICAST_MSK;
 948
 949         keyconf->flags |= IEEE80211_KEY_FLAG_GENERATE_IV;
 950
 951         spin_lock_irqsave(&priv->sta_lock, flags);
 952         priv->stations[sta_id].keyinfo.alg = keyconf->alg;
 953         priv->stations[sta_id].keyinfo.keylen = keyconf->keylen;
 954
 955         memcpy(priv->stations[sta_id].keyinfo.key, keyconf->key,
 956                keyconf->keylen);
 957
 958         memcpy(priv->stations[sta_id].sta.key.key, keyconf->key,
 959                keyconf->keylen);
 960
 961         if ((priv->stations[sta_id].sta.key.key_flags & STA_KEY_FLG_ENCRYPT_MSK)
 962                         == STA_KEY_FLG_NO_ENC)
 963                 priv->stations[sta_id].sta.key.key_offset =
 964                                  iwl_get_free_ucode_key_index(priv);
 965         /* else, we are overriding an existing key => no need to allocated room
 966          * in uCode. */
 967
 968         WARN(priv->stations[sta_id].sta.key.key_offset == WEP_INVALID_OFFSET,
 969                 "no space for a new key");
 970
 971         priv->stations[sta_id].sta.key.key_flags = key_flags;
 972         priv->stations[sta_id].sta.sta.modify_mask = STA_MODIFY_KEY_MASK;
 973         priv->stations[sta_id].sta.mode = STA_CONTROL_MODIFY_MSK;
 974
 975         ret = iwl_send_add_sta(priv, &priv->stations[sta_id].sta, CMD_ASYNC);
 976
 977         spin_unlock_irqrestore(&priv->sta_lock, flags);
 978
 979         return ret;
 980 }
 981
 982 static int iwl_set_tkip_dynamic_key_info(struct iwl_priv *priv,
 983                                    struct ieee80211_key_conf *keyconf,
 984                                    u8 sta_id)
 985 {
 986         unsigned long flags;
 987         int ret = 0;
 988         __le16 key_flags = 0;
 989
 990         key_flags |= (STA_KEY_FLG_TKIP | STA_KEY_FLG_MAP_KEY_MSK);
 991         key_flags |= cpu_to_le16(keyconf->keyidx << STA_KEY_FLG_KEYID_POS);
 992         key_flags &= ~STA_KEY_FLG_INVALID;
 993
 994         if (sta_id == priv->hw_params.bcast_sta_id)
 995                 key_flags |= STA_KEY_MULTICAST_MSK;
 996
 997         keyconf->flags |= IEEE80211_KEY_FLAG_GENERATE_IV;
 998         keyconf->flags |= IEEE80211_KEY_FLAG_GENERATE_MMIC;
 999
1000         spin_lock_irqsave(&priv->sta_lock, flags);
1001
1002         priv->stations[sta_id].keyinfo.alg = keyconf->alg;
1003         priv->stations[sta_id].keyinfo.keylen = 16;
1004
1005         if ((priv->stations[sta_id].sta.key.key_flags & STA_KEY_FLG_ENCRYPT_MSK)
1006                         == STA_KEY_FLG_NO_ENC)
1007                 priv->stations[sta_id].sta.key.key_offset =
1008                                  iwl_get_free_ucode_key_index(priv);
1009         /* else, we are overriding an existing key => no need to allocated room
1010          * in uCode. */
1011
1012         WARN(priv->stations[sta_id].sta.key.key_offset == WEP_INVALID_OFFSET,
1013                 "no space for a new key");
1014
1015         priv->stations[sta_id].sta.key.key_flags = key_flags;
1016
1017
1018         /* This copy is acutally not needed: we get the key with each TX */
1019         memcpy(priv->stations[sta_id].keyinfo.key, keyconf->key, 16);
1020
1021         memcpy(priv->stations[sta_id].sta.key.key, keyconf->key, 16);
1022
1023         spin_unlock_irqrestore(&priv->sta_lock, flags);
1024
1025         return ret;
1026 }
1027
1028 void iwl_update_tkip_key(struct iwl_priv *priv,
1029                         struct ieee80211_key_conf *keyconf,
1030                         const u8 *addr, u32 iv32, u16 *phase1key)
1031 {
1032         u8 sta_id = IWL_INVALID_STATION;
1033         unsigned long flags;
1034         int i;
1035
1036         sta_id = iwl_find_station(priv, addr);
1037         if (sta_id == IWL_INVALID_STATION) {
1038                 IWL_DEBUG_MAC80211(priv, "leave - %pM not in station map.\n",
1039                                    addr);
1040                 return;
1041         }
1042
1043         if (iwl_scan_cancel(priv)) {
1044                 /* cancel scan failed, just live w/ bad key and rely
1045                    briefly on SW decryption */
1046                 return;
1047         }
1048
1049         spin_lock_irqsave(&priv->sta_lock, flags);
1050
1051         priv->stations[sta_id].sta.key.tkip_rx_tsc_byte2 = (u8) iv32;
1052
1053         for (i = 0; i < 5; i++)
1054                 priv->stations[sta_id].sta.key.tkip_rx_ttak[i] =
1055                         cpu_to_le16(phase1key[i]);
1056
1057         priv->stations[sta_id].sta.sta.modify_mask = STA_MODIFY_KEY_MASK;
1058         priv->stations[sta_id].sta.mode = STA_CONTROL_MODIFY_MSK;
1059
1060         iwl_send_add_sta(priv, &priv->stations[sta_id].sta, CMD_ASYNC);
1061
1062         spin_unlock_irqrestore(&priv->sta_lock, flags);
1063
1064 }
1065 EXPORT_SYMBOL(iwl_update_tkip_key);
1066
1067 int iwl_remove_dynamic_key(struct iwl_priv *priv,
1068                                 struct ieee80211_key_conf *keyconf,
1069                                 u8 sta_id)
1070 {
1071         unsigned long flags;
1072         int ret = 0;
1073         u16 key_flags;
1074         u8 keyidx;
1075
1076         priv->key_mapping_key--;
1077
1078         spin_lock_irqsave(&priv->sta_lock, flags);
1079         key_flags = le16_to_cpu(priv->stations[sta_id].sta.key.key_flags);
1080         keyidx = (key_flags >> STA_KEY_FLG_KEYID_POS) & 0x3;
1081
1082         IWL_DEBUG_WEP(priv, "Remove dynamic key: idx=%d sta=%d\n",
1083                       keyconf->keyidx, sta_id);
1084
1085         if (keyconf->keyidx != keyidx) {
1086                 /* We need to remove a key with index different that the one
1087                  * in the uCode. This means that the key we need to remove has
1088                  * been replaced by another one with different index.
1089                  * Don't do anything and return ok
1090                  */
1091                 spin_unlock_irqrestore(&priv->sta_lock, flags);
1092                 return 0;
1093         }
1094
1095         if (priv->stations[sta_id].sta.key.key_offset == WEP_INVALID_OFFSET) {
1096                 IWL_WARN(priv, "Removing wrong key %d 0x%x\n",
1097                             keyconf->keyidx, key_flags);
1098                 spin_unlock_irqrestore(&priv->sta_lock, flags);
1099                 return 0;
1100         }
1101
1102         if (!test_and_clear_bit(priv->stations[sta_id].sta.key.key_offset,
1103                 &priv->ucode_key_table))
1104                 IWL_ERR(priv, "index %d not used in uCode key table.\n",
1105                         priv->stations[sta_id].sta.key.key_offset);
1106         memset(&priv->stations[sta_id].keyinfo, 0,
1107                                         sizeof(struct iwl_hw_key));
1108         memset(&priv->stations[sta_id].sta.key, 0,
1109                                         sizeof(struct iwl4965_keyinfo));
1110         priv->stations[sta_id].sta.key.key_flags =
1111                         STA_KEY_FLG_NO_ENC | STA_KEY_FLG_INVALID;
1112         priv->stations[sta_id].sta.key.key_offset = WEP_INVALID_OFFSET;
1113         priv->stations[sta_id].sta.sta.modify_mask = STA_MODIFY_KEY_MASK;
1114         priv->stations[sta_id].sta.mode = STA_CONTROL_MODIFY_MSK;
1115
1116         if (iwl_is_rfkill(priv)) {
1117                 IWL_DEBUG_WEP(priv, "Not sending REPLY_ADD_STA command because RFKILL enabled.\n");
1118                 spin_unlock_irqrestore(&priv->sta_lock, flags);
1119                 return 0;
1120         }
1121         ret =  iwl_send_add_sta(priv, &priv->stations[sta_id].sta, CMD_ASYNC);
1122         spin_unlock_irqrestore(&priv->sta_lock, flags);
1123         return ret;
1124 }
1125 EXPORT_SYMBOL(iwl_remove_dynamic_key);
1126
1127 int iwl_set_dynamic_key(struct iwl_priv *priv,
1128                                 struct ieee80211_key_conf *keyconf, u8 sta_id)
1129 {
1130         int ret;
1131
1132         priv->key_mapping_key++;
1133         keyconf->hw_key_idx = HW_KEY_DYNAMIC;
1134
1135         switch (keyconf->alg) {
1136         case ALG_CCMP:
1137                 ret = iwl_set_ccmp_dynamic_key_info(priv, keyconf, sta_id);
1138                 break;
1139         case ALG_TKIP:
1140                 ret = iwl_set_tkip_dynamic_key_info(priv, keyconf, sta_id);
1141                 break;
1142         case ALG_WEP:
1143                 ret = iwl_set_wep_dynamic_key_info(priv, keyconf, sta_id);
1144                 break;
1145         default:
1146                 IWL_ERR(priv,
1147                         "Unknown alg: %s alg = %d\n", __func__, keyconf->alg);
1148                 ret = -EINVAL;
1149         }
1150
1151         IWL_DEBUG_WEP(priv, "Set dynamic key: alg= %d len=%d idx=%d sta=%d ret=%d\n",
1152                       keyconf->alg, keyconf->keylen, keyconf->keyidx,
1153                       sta_id, ret);
1154
1155         return ret;
1156 }
1157 EXPORT_SYMBOL(iwl_set_dynamic_key);
1158
1159 #ifdef CONFIG_IWLWIFI_DEBUG
1160 static void iwl_dump_lq_cmd(struct iwl_priv *priv,
1161                            struct iwl_link_quality_cmd *lq)
1162 {
1163         int i;
1164         IWL_DEBUG_RATE(priv, "lq station id 0x%x\n", lq->sta_id);
1165         IWL_DEBUG_RATE(priv, "lq ant 0x%X 0x%X\n",
1166                        lq->general_params.single_stream_ant_msk,
1167                        lq->general_params.dual_stream_ant_msk);
1168
1169         for (i = 0; i < LINK_QUAL_MAX_RETRY_NUM; i++)
1170                 IWL_DEBUG_RATE(priv, "lq index %d 0x%X\n",
1171                                i, lq->rs_table[i].rate_n_flags);
1172 }
1173 #else
1174 static inline void iwl_dump_lq_cmd(struct iwl_priv *priv,
1175                                    struct iwl_link_quality_cmd *lq)
1176 {
1177 }
1178 #endif
1179
1180 /**
1181  * iwl_send_lq_cmd() - Send link quality command
1182  * @init: This command is sent as part of station initialization right
1183  *        after station has been added.
1184  *
1185  * The link quality command is sent as the last step of station creation.
1186  * This is the special case in which init is set and we call a callback in
1187  * this case to clear the state indicating that station creation is in
1188  * progress.
1189  */
1190 int iwl_send_lq_cmd(struct iwl_priv *priv,
1191                     struct iwl_link_quality_cmd *lq, u8 flags, bool init)
1192 {
1193         int ret = 0;
1194         unsigned long flags_spin;
1195
1196         struct iwl_host_cmd cmd = {
1197                 .id = REPLY_TX_LINK_QUALITY_CMD,
1198                 .len = sizeof(struct iwl_link_quality_cmd),
1199                 .flags = flags,
1200                 .data = lq,
1201         };
1202
1203         if (WARN_ON(lq->sta_id == IWL_INVALID_STATION))
1204                 return -EINVAL;
1205
1206         iwl_dump_lq_cmd(priv, lq);
1207         BUG_ON(init && (cmd.flags & CMD_ASYNC));
1208
1209         iwl_dump_lq_cmd(priv, lq);
1210         ret = iwl_send_cmd(priv, &cmd);
1211         if (ret || (cmd.flags & CMD_ASYNC))
1212                 return ret;
1213
1214         if (init) {
1215                 IWL_DEBUG_INFO(priv, "init LQ command complete, clearing sta addition status for sta %d\n",
1216                                lq->sta_id);
1217                 spin_lock_irqsave(&priv->sta_lock, flags_spin);
1218                 priv->stations[lq->sta_id].used &= ~IWL_STA_UCODE_INPROGRESS;
1219                 spin_unlock_irqrestore(&priv->sta_lock, flags_spin);
1220         }
1221         return 0;
1222 }
1223 EXPORT_SYMBOL(iwl_send_lq_cmd);
1224
1225 /**
1226  * iwl_add_bcast_station - add broadcast station into station table.
1227  */
1228 void iwl_add_bcast_station(struct iwl_priv *priv)
1229 {
1230         IWL_DEBUG_INFO(priv, "Adding broadcast station to station table\n");
1231         iwl_add_local_station(priv, iwl_bcast_addr, true);
1232 }
1233 EXPORT_SYMBOL(iwl_add_bcast_station);
1234
1235 /**
1236  * iwl3945_add_bcast_station - add broadcast station into station table.
1237  */
1238 void iwl3945_add_bcast_station(struct iwl_priv *priv)
1239 {
1240         IWL_DEBUG_INFO(priv, "Adding broadcast station to station table\n");
1241         iwl_add_local_station(priv, iwl_bcast_addr, false);
1242         /*
1243          * It is assumed that when station is added more initialization
1244          * needs to be done, but for 3945 it is not the case and we can
1245          * just release station table access right here.
1246          */
1247         priv->stations[priv->hw_params.bcast_sta_id].used &= ~IWL_STA_UCODE_INPROGRESS;
1248
1249 }
1250 EXPORT_SYMBOL(iwl3945_add_bcast_station);
1251
1252 /**
1253  * iwl_get_sta_id - Find station's index within station table
1254  *
1255  * If new IBSS station, create new entry in station table
1256  */
1257 int iwl_get_sta_id(struct iwl_priv *priv, struct ieee80211_hdr *hdr)
1258 {
1259         int sta_id;
1260         __le16 fc = hdr->frame_control;
1261
1262         /* If this frame is broadcast or management, use broadcast station id */
1263         if (!ieee80211_is_data(fc) ||  is_multicast_ether_addr(hdr->addr1))
1264                 return priv->hw_params.bcast_sta_id;
1265
1266         switch (priv->iw_mode) {
1267
1268         /* If we are a client station in a BSS network, use the special
1269          * AP station entry (that's the only station we communicate with) */
1270         case NL80211_IFTYPE_STATION:
1271                 /*
1272                  * If addition of station not complete yet, which means
1273                  * that rate scaling has not been initialized, then return
1274                  * the broadcast station.
1275                  */
1276                 if (!(priv->stations[IWL_AP_ID].used & IWL_STA_UCODE_ACTIVE))
1277                         return priv->hw_params.bcast_sta_id;
1278                 return IWL_AP_ID;
1279
1280         /* If we are an AP, then find the station, or use BCAST */
1281         case NL80211_IFTYPE_AP:
1282                 sta_id = iwl_find_station(priv, hdr->addr1);
1283                 if (sta_id != IWL_INVALID_STATION)
1284                         return sta_id;
1285                 return priv->hw_params.bcast_sta_id;
1286
1287         /* If this frame is going out to an IBSS network, find the station,
1288          * or create a new station table entry */
1289         case NL80211_IFTYPE_ADHOC:
1290                 sta_id = iwl_find_station(priv, hdr->addr1);
1291                 if (sta_id != IWL_INVALID_STATION)
1292                         return sta_id;
1293
1294                 IWL_DEBUG_DROP(priv, "Station %pM not in station map. "
1295                                "Defaulting to broadcast...\n",
1296                                hdr->addr1);
1297                 iwl_print_hex_dump(priv, IWL_DL_DROP, (u8 *) hdr, sizeof(*hdr));
1298                 return priv->hw_params.bcast_sta_id;
1299
1300         default:
1301                 IWL_WARN(priv, "Unknown mode of operation: %d\n",
1302                         priv->iw_mode);
1303                 return priv->hw_params.bcast_sta_id;
1304         }
1305 }
1306 EXPORT_SYMBOL(iwl_get_sta_id);
1307
1308 /**
1309  * iwl_sta_tx_modify_enable_tid - Enable Tx for this TID in station table
1310  */
1311 void iwl_sta_tx_modify_enable_tid(struct iwl_priv *priv, int sta_id, int tid)
1312 {
1313         unsigned long flags;
1314
1315         /* Remove "disable" flag, to enable Tx for this TID */
1316         spin_lock_irqsave(&priv->sta_lock, flags);
1317         priv->stations[sta_id].sta.sta.modify_mask = STA_MODIFY_TID_DISABLE_TX;
1318         priv->stations[sta_id].sta.tid_disable_tx &= cpu_to_le16(~(1 << tid));
1319         priv->stations[sta_id].sta.mode = STA_CONTROL_MODIFY_MSK;
1320         spin_unlock_irqrestore(&priv->sta_lock, flags);
1321
1322         iwl_send_add_sta(priv, &priv->stations[sta_id].sta, CMD_ASYNC);
1323 }
1324 EXPORT_SYMBOL(iwl_sta_tx_modify_enable_tid);
1325
1326 int iwl_sta_rx_agg_start(struct iwl_priv *priv,
1327                          const u8 *addr, int tid, u16 ssn)
1328 {
1329         unsigned long flags;
1330         int sta_id;
1331
1332         sta_id = iwl_find_station(priv, addr);
1333         if (sta_id == IWL_INVALID_STATION)
1334                 return -ENXIO;
1335
1336         spin_lock_irqsave(&priv->sta_lock, flags);
1337         priv->stations[sta_id].sta.station_flags_msk = 0;
1338         priv->stations[sta_id].sta.sta.modify_mask = STA_MODIFY_ADDBA_TID_MSK;
1339         priv->stations[sta_id].sta.add_immediate_ba_tid = (u8)tid;
1340         priv->stations[sta_id].sta.add_immediate_ba_ssn = cpu_to_le16(ssn);
1341         priv->stations[sta_id].sta.mode = STA_CONTROL_MODIFY_MSK;
1342         spin_unlock_irqrestore(&priv->sta_lock, flags);
1343
1344         return iwl_send_add_sta(priv, &priv->stations[sta_id].sta,
1345                                         CMD_ASYNC);
1346 }
1347 EXPORT_SYMBOL(iwl_sta_rx_agg_start);
1348
1349 int iwl_sta_rx_agg_stop(struct iwl_priv *priv, const u8 *addr, int tid)
1350 {
1351         unsigned long flags;
1352         int sta_id;
1353
1354         sta_id = iwl_find_station(priv, addr);
1355         if (sta_id == IWL_INVALID_STATION) {
1356                 IWL_ERR(priv, "Invalid station for AGG tid %d\n", tid);
1357                 return -ENXIO;
1358         }
1359
1360         spin_lock_irqsave(&priv->sta_lock, flags);
1361         priv->stations[sta_id].sta.station_flags_msk = 0;
1362         priv->stations[sta_id].sta.sta.modify_mask = STA_MODIFY_DELBA_TID_MSK;
1363         priv->stations[sta_id].sta.remove_immediate_ba_tid = (u8)tid;
1364         priv->stations[sta_id].sta.mode = STA_CONTROL_MODIFY_MSK;
1365         spin_unlock_irqrestore(&priv->sta_lock, flags);
1366
1367         return iwl_send_add_sta(priv, &priv->stations[sta_id].sta,
1368                                         CMD_ASYNC);
1369 }
1370 EXPORT_SYMBOL(iwl_sta_rx_agg_stop);
1371
1372 void iwl_sta_modify_ps_wake(struct iwl_priv *priv, int sta_id)
1373 {
1374         unsigned long flags;
1375
1376         spin_lock_irqsave(&priv->sta_lock, flags);
1377         priv->stations[sta_id].sta.station_flags &= ~STA_FLG_PWR_SAVE_MSK;
1378         priv->stations[sta_id].sta.station_flags_msk = STA_FLG_PWR_SAVE_MSK;
1379         priv->stations[sta_id].sta.sta.modify_mask = 0;
1380         priv->stations[sta_id].sta.sleep_tx_count = 0;
1381         priv->stations[sta_id].sta.mode = STA_CONTROL_MODIFY_MSK;
1382         spin_unlock_irqrestore(&priv->sta_lock, flags);
1383
1384         iwl_send_add_sta(priv, &priv->stations[sta_id].sta, CMD_ASYNC);
1385 }
1386 EXPORT_SYMBOL(iwl_sta_modify_ps_wake);
1387
1388 void iwl_sta_modify_sleep_tx_count(struct iwl_priv *priv, int sta_id, int cnt)
1389 {
1390         unsigned long flags;
1391
1392         spin_lock_irqsave(&priv->sta_lock, flags);
1393         priv->stations[sta_id].sta.station_flags |= STA_FLG_PWR_SAVE_MSK;
1394         priv->stations[sta_id].sta.station_flags_msk = STA_FLG_PWR_SAVE_MSK;
1395         priv->stations[sta_id].sta.sta.modify_mask =
1396                                         STA_MODIFY_SLEEP_TX_COUNT_MSK;
1397         priv->stations[sta_id].sta.sleep_tx_count = cpu_to_le16(cnt);
1398         priv->stations[sta_id].sta.mode = STA_CONTROL_MODIFY_MSK;
1399         spin_unlock_irqrestore(&priv->sta_lock, flags);
1400
1401         iwl_send_add_sta(priv, &priv->stations[sta_id].sta, CMD_ASYNC);
1402 }
1403 EXPORT_SYMBOL(iwl_sta_modify_sleep_tx_count);
1404
1405 int iwl_mac_sta_remove(struct ieee80211_hw *hw,
1406                                struct ieee80211_vif *vif,
1407                                struct ieee80211_sta *sta)
1408 {
1409         int ret;
1410         struct iwl_priv *priv = hw->priv;
1411         IWL_DEBUG_INFO(priv, "received request to remove station %pM\n",
1412                         sta->addr);
1413         ret = iwl_remove_station(priv, sta);
1414         if (ret)
1415                 IWL_ERR(priv, "Error removing station %pM\n",
1416                         sta->addr);
1417         return ret;
1418 }
1419 EXPORT_SYMBOL(iwl_mac_sta_remove);