SAFE public projects git trees. - safe/jmp/linux-2.6/blob - 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 struct iwl_link_quality_cmd *iwl_sta_init_lq(struct iwl_priv *priv,
 422                                                     const u8 *addr, bool is_ap)
 423 {
 424         int i, r;
 425         struct iwl_link_quality_cmd *link_cmd;
 426         u32 rate_flags;
 427         int ret = 0;
 428
 429         link_cmd = kzalloc(sizeof(struct iwl_link_quality_cmd), GFP_KERNEL);
 430         if (!link_cmd) {
 431                 IWL_ERR(priv, "Unable to allocate memory for LQ cmd.\n");
 432                 return NULL;
 433         }
 434         /* Set up the rate scaling to start at selected rate, fall back
 435          * all the way down to 1M in IEEE order, and then spin on 1M */
 436         if (is_ap)
 437                 r = IWL_RATE_54M_INDEX;
 438         else if (priv->band == IEEE80211_BAND_5GHZ)
 439                 r = IWL_RATE_6M_INDEX;
 440         else
 441                 r = IWL_RATE_1M_INDEX;
 442
 443         for (i = 0; i < LINK_QUAL_MAX_RETRY_NUM; i++) {
 444                 rate_flags = 0;
 445                 if (r >= IWL_FIRST_CCK_RATE && r <= IWL_LAST_CCK_RATE)
 446                         rate_flags |= RATE_MCS_CCK_MSK;
 447
 448                 rate_flags |= first_antenna(priv->hw_params.valid_tx_ant) <<
 449                                 RATE_MCS_ANT_POS;
 450
 451                 link_cmd->rs_table[i].rate_n_flags =
 452                         iwl_hw_set_rate_n_flags(iwl_rates[r].plcp, rate_flags);
 453                 r = iwl_get_prev_ieee_rate(r);
 454         }
 455
 456         link_cmd->general_params.single_stream_ant_msk =
 457                                 first_antenna(priv->hw_params.valid_tx_ant);
 458
 459         link_cmd->general_params.dual_stream_ant_msk =
 460                 priv->hw_params.valid_tx_ant &
 461                 ~first_antenna(priv->hw_params.valid_tx_ant);
 462         if (!link_cmd->general_params.dual_stream_ant_msk) {
 463                 link_cmd->general_params.dual_stream_ant_msk = ANT_AB;
 464         } else if (num_of_ant(priv->hw_params.valid_tx_ant) == 2) {
 465                 link_cmd->general_params.dual_stream_ant_msk =
 466                         priv->hw_params.valid_tx_ant;
 467         }
 468
 469         link_cmd->agg_params.agg_dis_start_th = LINK_QUAL_AGG_DISABLE_START_DEF;
 470         link_cmd->agg_params.agg_time_limit =
 471                 cpu_to_le16(LINK_QUAL_AGG_TIME_LIMIT_DEF);
 472
 473         /* Update the rate scaling for control frame Tx to AP */
 474         link_cmd->sta_id = is_ap ? IWL_AP_ID : priv->hw_params.bcast_sta_id;
 475
 476         ret = iwl_send_lq_cmd(priv, link_cmd, CMD_SYNC, true);
 477         if (ret)
 478                 IWL_ERR(priv, "Link quality command failed (%d)\n", ret);
 479
 480         return link_cmd;
 481 }
 482
 483 /*
 484  * iwl_add_local_stations - Add stations not requested by mac80211
 485  *
 486  * This will be either the broadcast station or the bssid station needed by
 487  * ad-hoc.
 488  *
 489  * Function sleeps.
 490  */
 491 int iwl_add_local_station(struct iwl_priv *priv, const u8 *addr, bool init_rs)
 492 {
 493         int ret;
 494         u8 sta_id;
 495         struct iwl_link_quality_cmd *link_cmd;
 496         unsigned long flags;
 497
 498         ret = iwl_add_station_common(priv, addr, 0, NULL, &sta_id);
 499         if (ret) {
 500                 IWL_ERR(priv, "Unable to add station %pM\n", addr);
 501                 return ret;
 502         }
 503
 504         spin_lock_irqsave(&priv->sta_lock, flags);
 505         priv->stations[sta_id].used |= IWL_STA_LOCAL;
 506         spin_unlock_irqrestore(&priv->sta_lock, flags);
 507
 508         if (init_rs) {
 509                 /* Set up default rate scaling table in device's station table */
 510                 link_cmd = iwl_sta_init_lq(priv, addr, false);
 511                 if (!link_cmd) {
 512                         IWL_ERR(priv, "Unable to initialize rate scaling for station %pM.\n",
 513                                 addr);
 514                         return -ENOMEM;
 515                 }
 516                 spin_lock_irqsave(&priv->sta_lock, flags);
 517                 priv->stations[sta_id].lq = link_cmd;
 518                 spin_unlock_irqrestore(&priv->sta_lock, flags);
 519         }
 520
 521         return 0;
 522 }
 523 EXPORT_SYMBOL(iwl_add_local_station);
 524
 525 /**
 526  * iwl_sta_ucode_deactivate - deactivate ucode status for a station
 527  *
 528  * priv->sta_lock must be held
 529  */
 530 static void iwl_sta_ucode_deactivate(struct iwl_priv *priv, u8 sta_id)
 531 {
 532         /* Ucode must be active and driver must be non active */
 533         if ((priv->stations[sta_id].used &
 534              (IWL_STA_UCODE_ACTIVE | IWL_STA_DRIVER_ACTIVE)) != IWL_STA_UCODE_ACTIVE)
 535                 IWL_ERR(priv, "removed non active STA %u\n", sta_id);
 536
 537         priv->stations[sta_id].used &= ~IWL_STA_UCODE_ACTIVE;
 538
 539         memset(&priv->stations[sta_id], 0, sizeof(struct iwl_station_entry));
 540         IWL_DEBUG_ASSOC(priv, "Removed STA %u\n", sta_id);
 541 }
 542
 543 static int iwl_send_remove_station(struct iwl_priv *priv,
 544                                    struct iwl_station_entry *station)
 545 {
 546         struct iwl_rx_packet *pkt;
 547         int ret;
 548
 549         unsigned long flags_spin;
 550         struct iwl_rem_sta_cmd rm_sta_cmd;
 551
 552         struct iwl_host_cmd cmd = {
 553                 .id = REPLY_REMOVE_STA,
 554                 .len = sizeof(struct iwl_rem_sta_cmd),
 555                 .flags = CMD_SYNC,
 556                 .data = &rm_sta_cmd,
 557         };
 558
 559         memset(&rm_sta_cmd, 0, sizeof(rm_sta_cmd));
 560         rm_sta_cmd.num_sta = 1;
 561         memcpy(&rm_sta_cmd.addr, &station->sta.sta.addr , ETH_ALEN);
 562
 563         cmd.flags |= CMD_WANT_SKB;
 564
 565         ret = iwl_send_cmd(priv, &cmd);
 566
 567         if (ret)
 568                 return ret;
 569
 570         pkt = (struct iwl_rx_packet *)cmd.reply_page;
 571         if (pkt->hdr.flags & IWL_CMD_FAILED_MSK) {
 572                 IWL_ERR(priv, "Bad return from REPLY_REMOVE_STA (0x%08X)\n",
 573                           pkt->hdr.flags);
 574                 ret = -EIO;
 575         }
 576
 577         if (!ret) {
 578                 switch (pkt->u.rem_sta.status) {
 579                 case REM_STA_SUCCESS_MSK:
 580                         spin_lock_irqsave(&priv->sta_lock, flags_spin);
 581                         iwl_sta_ucode_deactivate(priv, station->sta.sta.sta_id);
 582                         spin_unlock_irqrestore(&priv->sta_lock, flags_spin);
 583                         IWL_DEBUG_ASSOC(priv, "REPLY_REMOVE_STA PASSED\n");
 584                         break;
 585                 default:
 586                         ret = -EIO;
 587                         IWL_ERR(priv, "REPLY_REMOVE_STA failed\n");
 588                         break;
 589                 }
 590         }
 591         iwl_free_pages(priv, cmd.reply_page);
 592
 593         return ret;
 594 }
 595
 596 /**
 597  * iwl_remove_station - Remove driver's knowledge of station.
 598  */
 599 int iwl_remove_station(struct iwl_priv *priv, const u8 *addr)
 600 {
 601         int sta_id = IWL_INVALID_STATION;
 602         int i, ret = -EINVAL;
 603         unsigned long flags;
 604         bool is_ap = priv->iw_mode == NL80211_IFTYPE_STATION;
 605         struct iwl_station_entry *station;
 606
 607         if (!iwl_is_ready(priv)) {
 608                 IWL_DEBUG_INFO(priv,
 609                         "Unable to remove station %pM, device not ready.\n",
 610                         addr);
 611                 /*
 612                  * It is typical for stations to be removed when we are
 613                  * going down. Return success since device will be down
 614                  * soon anyway
 615                  */
 616                 return 0;
 617         }
 618
 619         spin_lock_irqsave(&priv->sta_lock, flags);
 620
 621         if (is_ap)
 622                 sta_id = IWL_AP_ID;
 623         else
 624                 for (i = IWL_STA_ID; i < priv->hw_params.max_stations; i++)
 625                         if (priv->stations[i].used &&
 626                             !compare_ether_addr(priv->stations[i].sta.sta.addr,
 627                                                 addr)) {
 628                                 sta_id = i;
 629                                 break;
 630                         }
 631
 632         if (unlikely(sta_id == IWL_INVALID_STATION))
 633                 goto out;
 634
 635         IWL_DEBUG_ASSOC(priv, "Removing STA from driver:%d  %pM\n",
 636                 sta_id, addr);
 637
 638         if (!(priv->stations[sta_id].used & IWL_STA_DRIVER_ACTIVE)) {
 639                 IWL_DEBUG_INFO(priv, "Removing %pM but non DRIVER active\n",
 640                                 addr);
 641                 goto out;
 642         }
 643
 644         if (!(priv->stations[sta_id].used & IWL_STA_UCODE_ACTIVE)) {
 645                 IWL_DEBUG_INFO(priv, "Removing %pM but non UCODE active\n",
 646                                 addr);
 647                 goto out;
 648         }
 649
 650         if (priv->stations[sta_id].used & IWL_STA_LOCAL) {
 651                 kfree(priv->stations[sta_id].lq);
 652                 priv->stations[sta_id].lq = NULL;
 653         }
 654
 655         priv->stations[sta_id].used &= ~IWL_STA_DRIVER_ACTIVE;
 656
 657         priv->num_stations--;
 658
 659         BUG_ON(priv->num_stations < 0);
 660
 661         station = &priv->stations[sta_id];
 662         spin_unlock_irqrestore(&priv->sta_lock, flags);
 663
 664         ret = iwl_send_remove_station(priv, station);
 665         return ret;
 666 out:
 667         spin_unlock_irqrestore(&priv->sta_lock, flags);
 668         return ret;
 669 }
 670 EXPORT_SYMBOL_GPL(iwl_remove_station);
 671
 672 /**
 673  * iwl_clear_ucode_stations() - clear entire station table driver and/or ucode
 674  * @priv:
 675  * @force: If set then the uCode station table needs to be cleared here. If
 676  *         not set then the uCode station table has already been cleared,
 677  *         for example after sending it a RXON command without ASSOC bit
 678  *         set, and we just need to change driver state here.
 679  */
 680 void iwl_clear_ucode_stations(struct iwl_priv *priv, bool force)
 681 {
 682         int i;
 683         unsigned long flags_spin;
 684         bool cleared = false;
 685
 686         IWL_DEBUG_INFO(priv, "Clearing ucode stations in driver%s\n",
 687                         force ? " and ucode" : "");
 688
 689         if (force) {
 690                 if (!iwl_is_ready(priv)) {
 691                         /*
 692                          * If device is not ready at this point the station
 693                          * table is likely already empty (uCode not ready
 694                          * to receive station requests) or will soon be
 695                          * due to interface going down.
 696                          */
 697                         IWL_DEBUG_INFO(priv, "Unable to remove stations from device - device not ready\n");
 698                 } else {
 699                         iwl_send_cmd_pdu_async(priv, REPLY_REMOVE_ALL_STA, 0, NULL, NULL);
 700                 }
 701         }
 702
 703         spin_lock_irqsave(&priv->sta_lock, flags_spin);
 704         if (force) {
 705                 IWL_DEBUG_INFO(priv, "Clearing all station information in driver\n");
 706                 /*
 707                  * The station entry contains a link to the LQ command. For
 708                  * all stations managed by mac80211 this memory will be
 709                  * managed by it also. For local stations (broadcast and
 710                  * bssid station when in adhoc mode) we need to maintain
 711                  * this lq command separately. This memory is created when
 712                  * these stations are added.
 713                  */
 714                 for (i = 0; i < priv->hw_params.max_stations; i++) {
 715                         if (priv->stations[i].used & IWL_STA_LOCAL) {
 716                                 kfree(priv->stations[i].lq);
 717                                 priv->stations[i].lq = NULL;
 718                         }
 719                 }
 720                 priv->num_stations = 0;
 721                 memset(priv->stations, 0, sizeof(priv->stations));
 722                 cleared = true;
 723         } else {
 724                 for (i = 0; i < priv->hw_params.max_stations; i++) {
 725                         if (priv->stations[i].used & IWL_STA_UCODE_ACTIVE) {
 726                                 IWL_DEBUG_INFO(priv, "Clearing ucode active for station %d\n", i);
 727                                 priv->stations[i].used &= ~IWL_STA_UCODE_ACTIVE;
 728                                 cleared = true;
 729                         }
 730                 }
 731         }
 732         spin_unlock_irqrestore(&priv->sta_lock, flags_spin);
 733
 734         if (!cleared)
 735                 IWL_DEBUG_INFO(priv, "No active stations found to be cleared\n");
 736 }
 737 EXPORT_SYMBOL(iwl_clear_ucode_stations);
 738
 739 /**
 740  * iwl_restore_stations() - Restore driver known stations to device
 741  *
 742  * All stations considered active by driver, but not present in ucode, is
 743  * restored.
 744  *
 745  * Function sleeps.
 746  */
 747 void iwl_restore_stations(struct iwl_priv *priv)
 748 {
 749         struct iwl_station_entry *station;
 750         unsigned long flags_spin;
 751         int i;
 752         bool found = false;
 753         int ret;
 754
 755         if (!iwl_is_ready(priv)) {
 756                 IWL_DEBUG_INFO(priv, "Not ready yet, not restoring any stations.\n");
 757                 return;
 758         }
 759
 760         IWL_DEBUG_ASSOC(priv, "Restoring all known stations ... start.\n");
 761         spin_lock_irqsave(&priv->sta_lock, flags_spin);
 762         for (i = 0; i < priv->hw_params.max_stations; i++) {
 763                 if ((priv->stations[i].used & IWL_STA_DRIVER_ACTIVE) &&
 764                             !(priv->stations[i].used & IWL_STA_UCODE_ACTIVE)) {
 765                         IWL_DEBUG_ASSOC(priv, "Restoring sta %pM\n",
 766                                         priv->stations[i].sta.sta.addr);
 767                         priv->stations[i].sta.mode = 0;
 768                         priv->stations[i].used |= IWL_STA_UCODE_INPROGRESS;
 769                         found = true;
 770                 }
 771         }
 772
 773         for (i = 0; i < priv->hw_params.max_stations; i++) {
 774                 if ((priv->stations[i].used & IWL_STA_UCODE_INPROGRESS)) {
 775                         spin_unlock_irqrestore(&priv->sta_lock, flags_spin);
 776                         station = &priv->stations[i];
 777                         ret = iwl_send_add_sta(priv, &priv->stations[i].sta, CMD_SYNC);
 778                         if (ret) {
 779                                 IWL_ERR(priv, "Adding station %pM failed.\n",
 780                                         station->sta.sta.addr);
 781                                 spin_lock_irqsave(&priv->sta_lock, flags_spin);
 782                                 priv->stations[i].used &= ~IWL_STA_DRIVER_ACTIVE;
 783                                 priv->stations[i].used &= ~IWL_STA_UCODE_INPROGRESS;
 784                                 spin_unlock_irqrestore(&priv->sta_lock, flags_spin);
 785                         }
 786                         /*
 787                          * Rate scaling has already been initialized, send
 788                          * current LQ command
 789                          */
 790                         if (station->lq)
 791                                 iwl_send_lq_cmd(priv, station->lq, CMD_SYNC, true);
 792                         spin_lock_irqsave(&priv->sta_lock, flags_spin);
 793                         priv->stations[i].used &= ~IWL_STA_UCODE_INPROGRESS;
 794                 }
 795         }
 796
 797         spin_unlock_irqrestore(&priv->sta_lock, flags_spin);
 798         if (!found)
 799                 IWL_DEBUG_INFO(priv, "Restoring all known stations .... no stations to be restored.\n");
 800         else
 801                 IWL_DEBUG_INFO(priv, "Restoring all known stations .... complete.\n");
 802 }
 803 EXPORT_SYMBOL(iwl_restore_stations);
 804
 805 int iwl_get_free_ucode_key_index(struct iwl_priv *priv)
 806 {
 807         int i;
 808
 809         for (i = 0; i < STA_KEY_MAX_NUM; i++)
 810                 if (!test_and_set_bit(i, &priv->ucode_key_table))
 811                         return i;
 812
 813         return WEP_INVALID_OFFSET;
 814 }
 815 EXPORT_SYMBOL(iwl_get_free_ucode_key_index);
 816
 817 static int iwl_send_static_wepkey_cmd(struct iwl_priv *priv, u8 send_if_empty)
 818 {
 819         int i, not_empty = 0;
 820         u8 buff[sizeof(struct iwl_wep_cmd) +
 821                 sizeof(struct iwl_wep_key) * WEP_KEYS_MAX];
 822         struct iwl_wep_cmd *wep_cmd = (struct iwl_wep_cmd *)buff;
 823         size_t cmd_size  = sizeof(struct iwl_wep_cmd);
 824         struct iwl_host_cmd cmd = {
 825                 .id = REPLY_WEPKEY,
 826                 .data = wep_cmd,
 827                 .flags = CMD_SYNC,
 828         };
 829
 830         might_sleep();
 831
 832         memset(wep_cmd, 0, cmd_size +
 833                         (sizeof(struct iwl_wep_key) * WEP_KEYS_MAX));
 834
 835         for (i = 0; i < WEP_KEYS_MAX ; i++) {
 836                 wep_cmd->key[i].key_index = i;
 837                 if (priv->wep_keys[i].key_size) {
 838                         wep_cmd->key[i].key_offset = i;
 839                         not_empty = 1;
 840                 } else {
 841                         wep_cmd->key[i].key_offset = WEP_INVALID_OFFSET;
 842                 }
 843
 844                 wep_cmd->key[i].key_size = priv->wep_keys[i].key_size;
 845                 memcpy(&wep_cmd->key[i].key[3], priv->wep_keys[i].key,
 846                                 priv->wep_keys[i].key_size);
 847         }
 848
 849         wep_cmd->global_key_type = WEP_KEY_WEP_TYPE;
 850         wep_cmd->num_keys = WEP_KEYS_MAX;
 851
 852         cmd_size += sizeof(struct iwl_wep_key) * WEP_KEYS_MAX;
 853
 854         cmd.len = cmd_size;
 855
 856         if (not_empty || send_if_empty)
 857                 return iwl_send_cmd(priv, &cmd);
 858         else
 859                 return 0;
 860 }
 861
 862 int iwl_restore_default_wep_keys(struct iwl_priv *priv)
 863 {
 864         WARN_ON(!mutex_is_locked(&priv->mutex));
 865
 866         return iwl_send_static_wepkey_cmd(priv, 0);
 867 }
 868 EXPORT_SYMBOL(iwl_restore_default_wep_keys);
 869
 870 int iwl_remove_default_wep_key(struct iwl_priv *priv,
 871                                struct ieee80211_key_conf *keyconf)
 872 {
 873         int ret;
 874
 875         WARN_ON(!mutex_is_locked(&priv->mutex));
 876
 877         IWL_DEBUG_WEP(priv, "Removing default WEP key: idx=%d\n",
 878                       keyconf->keyidx);
 879
 880         memset(&priv->wep_keys[keyconf->keyidx], 0, sizeof(priv->wep_keys[0]));
 881         if (iwl_is_rfkill(priv)) {
 882                 IWL_DEBUG_WEP(priv, "Not sending REPLY_WEPKEY command due to RFKILL.\n");
 883                 /* but keys in device are clear anyway so return success */
 884                 return 0;
 885         }
 886         ret = iwl_send_static_wepkey_cmd(priv, 1);
 887         IWL_DEBUG_WEP(priv, "Remove default WEP key: idx=%d ret=%d\n",
 888                       keyconf->keyidx, ret);
 889
 890         return ret;
 891 }
 892 EXPORT_SYMBOL(iwl_remove_default_wep_key);
 893
 894 int iwl_set_default_wep_key(struct iwl_priv *priv,
 895                             struct ieee80211_key_conf *keyconf)
 896 {
 897         int ret;
 898
 899         WARN_ON(!mutex_is_locked(&priv->mutex));
 900
 901         if (keyconf->keylen != WEP_KEY_LEN_128 &&
 902             keyconf->keylen != WEP_KEY_LEN_64) {
 903                 IWL_DEBUG_WEP(priv, "Bad WEP key length %d\n", keyconf->keylen);
 904                 return -EINVAL;
 905         }
 906
 907         keyconf->flags &= ~IEEE80211_KEY_FLAG_GENERATE_IV;
 908         keyconf->hw_key_idx = HW_KEY_DEFAULT;
 909         priv->stations[IWL_AP_ID].keyinfo.alg = ALG_WEP;
 910
 911         priv->wep_keys[keyconf->keyidx].key_size = keyconf->keylen;
 912         memcpy(&priv->wep_keys[keyconf->keyidx].key, &keyconf->key,
 913                                                         keyconf->keylen);
 914
 915         ret = iwl_send_static_wepkey_cmd(priv, 0);
 916         IWL_DEBUG_WEP(priv, "Set default WEP key: len=%d idx=%d ret=%d\n",
 917                 keyconf->keylen, keyconf->keyidx, ret);
 918
 919         return ret;
 920 }
 921 EXPORT_SYMBOL(iwl_set_default_wep_key);
 922
 923 static int iwl_set_wep_dynamic_key_info(struct iwl_priv *priv,
 924                                 struct ieee80211_key_conf *keyconf,
 925                                 u8 sta_id)
 926 {
 927         unsigned long flags;
 928         __le16 key_flags = 0;
 929         int ret;
 930
 931         keyconf->flags &= ~IEEE80211_KEY_FLAG_GENERATE_IV;
 932
 933         key_flags |= (STA_KEY_FLG_WEP | STA_KEY_FLG_MAP_KEY_MSK);
 934         key_flags |= cpu_to_le16(keyconf->keyidx << STA_KEY_FLG_KEYID_POS);
 935         key_flags &= ~STA_KEY_FLG_INVALID;
 936
 937         if (keyconf->keylen == WEP_KEY_LEN_128)
 938                 key_flags |= STA_KEY_FLG_KEY_SIZE_MSK;
 939
 940         if (sta_id == priv->hw_params.bcast_sta_id)
 941                 key_flags |= STA_KEY_MULTICAST_MSK;
 942
 943         spin_lock_irqsave(&priv->sta_lock, flags);
 944
 945         priv->stations[sta_id].keyinfo.alg = keyconf->alg;
 946         priv->stations[sta_id].keyinfo.keylen = keyconf->keylen;
 947         priv->stations[sta_id].keyinfo.keyidx = keyconf->keyidx;
 948
 949         memcpy(priv->stations[sta_id].keyinfo.key,
 950                                 keyconf->key, keyconf->keylen);
 951
 952         memcpy(&priv->stations[sta_id].sta.key.key[3],
 953                                 keyconf->key, keyconf->keylen);
 954
 955         if ((priv->stations[sta_id].sta.key.key_flags & STA_KEY_FLG_ENCRYPT_MSK)
 956                         == STA_KEY_FLG_NO_ENC)
 957                 priv->stations[sta_id].sta.key.key_offset =
 958                                  iwl_get_free_ucode_key_index(priv);
 959         /* else, we are overriding an existing key => no need to allocated room
 960          * in uCode. */
 961
 962         WARN(priv->stations[sta_id].sta.key.key_offset == WEP_INVALID_OFFSET,
 963                 "no space for a new key");
 964
 965         priv->stations[sta_id].sta.key.key_flags = key_flags;
 966         priv->stations[sta_id].sta.sta.modify_mask = STA_MODIFY_KEY_MASK;
 967         priv->stations[sta_id].sta.mode = STA_CONTROL_MODIFY_MSK;
 968
 969         ret = iwl_send_add_sta(priv, &priv->stations[sta_id].sta, CMD_ASYNC);
 970
 971         spin_unlock_irqrestore(&priv->sta_lock, flags);
 972
 973         return ret;
 974 }
 975
 976 static int iwl_set_ccmp_dynamic_key_info(struct iwl_priv *priv,
 977                                    struct ieee80211_key_conf *keyconf,
 978                                    u8 sta_id)
 979 {
 980         unsigned long flags;
 981         __le16 key_flags = 0;
 982         int ret;
 983
 984         key_flags |= (STA_KEY_FLG_CCMP | STA_KEY_FLG_MAP_KEY_MSK);
 985         key_flags |= cpu_to_le16(keyconf->keyidx << STA_KEY_FLG_KEYID_POS);
 986         key_flags &= ~STA_KEY_FLG_INVALID;
 987
 988         if (sta_id == priv->hw_params.bcast_sta_id)
 989                 key_flags |= STA_KEY_MULTICAST_MSK;
 990
 991         keyconf->flags |= IEEE80211_KEY_FLAG_GENERATE_IV;
 992
 993         spin_lock_irqsave(&priv->sta_lock, flags);
 994         priv->stations[sta_id].keyinfo.alg = keyconf->alg;
 995         priv->stations[sta_id].keyinfo.keylen = keyconf->keylen;
 996
 997         memcpy(priv->stations[sta_id].keyinfo.key, keyconf->key,
 998                keyconf->keylen);
 999
1000         memcpy(priv->stations[sta_id].sta.key.key, keyconf->key,
1001                keyconf->keylen);
1002
1003         if ((priv->stations[sta_id].sta.key.key_flags & STA_KEY_FLG_ENCRYPT_MSK)
1004                         == STA_KEY_FLG_NO_ENC)
1005                 priv->stations[sta_id].sta.key.key_offset =
1006                                  iwl_get_free_ucode_key_index(priv);
1007         /* else, we are overriding an existing key => no need to allocated room
1008          * in uCode. */
1009
1010         WARN(priv->stations[sta_id].sta.key.key_offset == WEP_INVALID_OFFSET,
1011                 "no space for a new key");
1012
1013         priv->stations[sta_id].sta.key.key_flags = key_flags;
1014         priv->stations[sta_id].sta.sta.modify_mask = STA_MODIFY_KEY_MASK;
1015         priv->stations[sta_id].sta.mode = STA_CONTROL_MODIFY_MSK;
1016
1017         ret = iwl_send_add_sta(priv, &priv->stations[sta_id].sta, CMD_ASYNC);
1018
1019         spin_unlock_irqrestore(&priv->sta_lock, flags);
1020
1021         return ret;
1022 }
1023
1024 static int iwl_set_tkip_dynamic_key_info(struct iwl_priv *priv,
1025                                    struct ieee80211_key_conf *keyconf,
1026                                    u8 sta_id)
1027 {
1028         unsigned long flags;
1029         int ret = 0;
1030         __le16 key_flags = 0;
1031
1032         key_flags |= (STA_KEY_FLG_TKIP | STA_KEY_FLG_MAP_KEY_MSK);
1033         key_flags |= cpu_to_le16(keyconf->keyidx << STA_KEY_FLG_KEYID_POS);
1034         key_flags &= ~STA_KEY_FLG_INVALID;
1035
1036         if (sta_id == priv->hw_params.bcast_sta_id)
1037                 key_flags |= STA_KEY_MULTICAST_MSK;
1038
1039         keyconf->flags |= IEEE80211_KEY_FLAG_GENERATE_IV;
1040         keyconf->flags |= IEEE80211_KEY_FLAG_GENERATE_MMIC;
1041
1042         spin_lock_irqsave(&priv->sta_lock, flags);
1043
1044         priv->stations[sta_id].keyinfo.alg = keyconf->alg;
1045         priv->stations[sta_id].keyinfo.keylen = 16;
1046
1047         if ((priv->stations[sta_id].sta.key.key_flags & STA_KEY_FLG_ENCRYPT_MSK)
1048                         == STA_KEY_FLG_NO_ENC)
1049                 priv->stations[sta_id].sta.key.key_offset =
1050                                  iwl_get_free_ucode_key_index(priv);
1051         /* else, we are overriding an existing key => no need to allocated room
1052          * in uCode. */
1053
1054         WARN(priv->stations[sta_id].sta.key.key_offset == WEP_INVALID_OFFSET,
1055                 "no space for a new key");
1056
1057         priv->stations[sta_id].sta.key.key_flags = key_flags;
1058
1059
1060         /* This copy is acutally not needed: we get the key with each TX */
1061         memcpy(priv->stations[sta_id].keyinfo.key, keyconf->key, 16);
1062
1063         memcpy(priv->stations[sta_id].sta.key.key, keyconf->key, 16);
1064
1065         spin_unlock_irqrestore(&priv->sta_lock, flags);
1066
1067         return ret;
1068 }
1069
1070 void iwl_update_tkip_key(struct iwl_priv *priv,
1071                         struct ieee80211_key_conf *keyconf,
1072                         const u8 *addr, u32 iv32, u16 *phase1key)
1073 {
1074         u8 sta_id = IWL_INVALID_STATION;
1075         unsigned long flags;
1076         int i;
1077
1078         sta_id = iwl_find_station(priv, addr);
1079         if (sta_id == IWL_INVALID_STATION) {
1080                 IWL_DEBUG_MAC80211(priv, "leave - %pM not in station map.\n",
1081                                    addr);
1082                 return;
1083         }
1084
1085         if (iwl_scan_cancel(priv)) {
1086                 /* cancel scan failed, just live w/ bad key and rely
1087                    briefly on SW decryption */
1088                 return;
1089         }
1090
1091         spin_lock_irqsave(&priv->sta_lock, flags);
1092
1093         priv->stations[sta_id].sta.key.tkip_rx_tsc_byte2 = (u8) iv32;
1094
1095         for (i = 0; i < 5; i++)
1096                 priv->stations[sta_id].sta.key.tkip_rx_ttak[i] =
1097                         cpu_to_le16(phase1key[i]);
1098
1099         priv->stations[sta_id].sta.sta.modify_mask = STA_MODIFY_KEY_MASK;
1100         priv->stations[sta_id].sta.mode = STA_CONTROL_MODIFY_MSK;
1101
1102         iwl_send_add_sta(priv, &priv->stations[sta_id].sta, CMD_ASYNC);
1103
1104         spin_unlock_irqrestore(&priv->sta_lock, flags);
1105
1106 }
1107 EXPORT_SYMBOL(iwl_update_tkip_key);
1108
1109 int iwl_remove_dynamic_key(struct iwl_priv *priv,
1110                                 struct ieee80211_key_conf *keyconf,
1111                                 u8 sta_id)
1112 {
1113         unsigned long flags;
1114         int ret = 0;
1115         u16 key_flags;
1116         u8 keyidx;
1117
1118         priv->key_mapping_key--;
1119
1120         spin_lock_irqsave(&priv->sta_lock, flags);
1121         key_flags = le16_to_cpu(priv->stations[sta_id].sta.key.key_flags);
1122         keyidx = (key_flags >> STA_KEY_FLG_KEYID_POS) & 0x3;
1123
1124         IWL_DEBUG_WEP(priv, "Remove dynamic key: idx=%d sta=%d\n",
1125                       keyconf->keyidx, sta_id);
1126
1127         if (keyconf->keyidx != keyidx) {
1128                 /* We need to remove a key with index different that the one
1129                  * in the uCode. This means that the key we need to remove has
1130                  * been replaced by another one with different index.
1131                  * Don't do anything and return ok
1132                  */
1133                 spin_unlock_irqrestore(&priv->sta_lock, flags);
1134                 return 0;
1135         }
1136
1137         if (priv->stations[sta_id].sta.key.key_offset == WEP_INVALID_OFFSET) {
1138                 IWL_WARN(priv, "Removing wrong key %d 0x%x\n",
1139                             keyconf->keyidx, key_flags);
1140                 spin_unlock_irqrestore(&priv->sta_lock, flags);
1141                 return 0;
1142         }
1143
1144         if (!test_and_clear_bit(priv->stations[sta_id].sta.key.key_offset,
1145                 &priv->ucode_key_table))
1146                 IWL_ERR(priv, "index %d not used in uCode key table.\n",
1147                         priv->stations[sta_id].sta.key.key_offset);
1148         memset(&priv->stations[sta_id].keyinfo, 0,
1149                                         sizeof(struct iwl_hw_key));
1150         memset(&priv->stations[sta_id].sta.key, 0,
1151                                         sizeof(struct iwl4965_keyinfo));
1152         priv->stations[sta_id].sta.key.key_flags =
1153                         STA_KEY_FLG_NO_ENC | STA_KEY_FLG_INVALID;
1154         priv->stations[sta_id].sta.key.key_offset = WEP_INVALID_OFFSET;
1155         priv->stations[sta_id].sta.sta.modify_mask = STA_MODIFY_KEY_MASK;
1156         priv->stations[sta_id].sta.mode = STA_CONTROL_MODIFY_MSK;
1157
1158         if (iwl_is_rfkill(priv)) {
1159                 IWL_DEBUG_WEP(priv, "Not sending REPLY_ADD_STA command because RFKILL enabled.\n");
1160                 spin_unlock_irqrestore(&priv->sta_lock, flags);
1161                 return 0;
1162         }
1163         ret =  iwl_send_add_sta(priv, &priv->stations[sta_id].sta, CMD_ASYNC);
1164         spin_unlock_irqrestore(&priv->sta_lock, flags);
1165         return ret;
1166 }
1167 EXPORT_SYMBOL(iwl_remove_dynamic_key);
1168
1169 int iwl_set_dynamic_key(struct iwl_priv *priv,
1170                                 struct ieee80211_key_conf *keyconf, u8 sta_id)
1171 {
1172         int ret;
1173
1174         priv->key_mapping_key++;
1175         keyconf->hw_key_idx = HW_KEY_DYNAMIC;
1176
1177         switch (keyconf->alg) {
1178         case ALG_CCMP:
1179                 ret = iwl_set_ccmp_dynamic_key_info(priv, keyconf, sta_id);
1180                 break;
1181         case ALG_TKIP:
1182                 ret = iwl_set_tkip_dynamic_key_info(priv, keyconf, sta_id);
1183                 break;
1184         case ALG_WEP:
1185                 ret = iwl_set_wep_dynamic_key_info(priv, keyconf, sta_id);
1186                 break;
1187         default:
1188                 IWL_ERR(priv,
1189                         "Unknown alg: %s alg = %d\n", __func__, keyconf->alg);
1190                 ret = -EINVAL;
1191         }
1192
1193         IWL_DEBUG_WEP(priv, "Set dynamic key: alg= %d len=%d idx=%d sta=%d ret=%d\n",
1194                       keyconf->alg, keyconf->keylen, keyconf->keyidx,
1195                       sta_id, ret);
1196
1197         return ret;
1198 }
1199 EXPORT_SYMBOL(iwl_set_dynamic_key);
1200
1201 #ifdef CONFIG_IWLWIFI_DEBUG
1202 static void iwl_dump_lq_cmd(struct iwl_priv *priv,
1203                            struct iwl_link_quality_cmd *lq)
1204 {
1205         int i;
1206         IWL_DEBUG_RATE(priv, "lq station id 0x%x\n", lq->sta_id);
1207         IWL_DEBUG_RATE(priv, "lq ant 0x%X 0x%X\n",
1208                        lq->general_params.single_stream_ant_msk,
1209                        lq->general_params.dual_stream_ant_msk);
1210
1211         for (i = 0; i < LINK_QUAL_MAX_RETRY_NUM; i++)
1212                 IWL_DEBUG_RATE(priv, "lq index %d 0x%X\n",
1213                                i, lq->rs_table[i].rate_n_flags);
1214 }
1215 #else
1216 static inline void iwl_dump_lq_cmd(struct iwl_priv *priv,
1217                                    struct iwl_link_quality_cmd *lq)
1218 {
1219 }
1220 #endif
1221
1222 /**
1223  * iwl_send_lq_cmd() - Send link quality command
1224  * @init: This command is sent as part of station initialization right
1225  *        after station has been added.
1226  *
1227  * The link quality command is sent as the last step of station creation.
1228  * This is the special case in which init is set and we call a callback in
1229  * this case to clear the state indicating that station creation is in
1230  * progress.
1231  */
1232 int iwl_send_lq_cmd(struct iwl_priv *priv,
1233                     struct iwl_link_quality_cmd *lq, u8 flags, bool init)
1234 {
1235         int ret = 0;
1236         unsigned long flags_spin;
1237
1238         struct iwl_host_cmd cmd = {
1239                 .id = REPLY_TX_LINK_QUALITY_CMD,
1240                 .len = sizeof(struct iwl_link_quality_cmd),
1241                 .flags = flags,
1242                 .data = lq,
1243         };
1244
1245         if (WARN_ON(lq->sta_id == IWL_INVALID_STATION))
1246                 return -EINVAL;
1247
1248         iwl_dump_lq_cmd(priv, lq);
1249         BUG_ON(init && (cmd.flags & CMD_ASYNC));
1250
1251         ret = iwl_send_cmd(priv, &cmd);
1252
1253         if (cmd.flags & CMD_ASYNC)
1254                 return ret;
1255
1256         if (init) {
1257                 IWL_DEBUG_INFO(priv, "init LQ command complete, clearing sta addition status for sta %d\n",
1258                                lq->sta_id);
1259                 spin_lock_irqsave(&priv->sta_lock, flags_spin);
1260                 priv->stations[lq->sta_id].used &= ~IWL_STA_UCODE_INPROGRESS;
1261                 spin_unlock_irqrestore(&priv->sta_lock, flags_spin);
1262         }
1263         return ret;
1264 }
1265 EXPORT_SYMBOL(iwl_send_lq_cmd);
1266
1267 /**
1268  * iwl_add_bcast_station - add broadcast station into station table.
1269  */
1270 int iwl_add_bcast_station(struct iwl_priv *priv)
1271 {
1272         IWL_DEBUG_INFO(priv, "Adding broadcast station to station table\n");
1273         return iwl_add_local_station(priv, iwl_bcast_addr, true);
1274 }
1275 EXPORT_SYMBOL(iwl_add_bcast_station);
1276
1277 /**
1278  * iwl3945_add_bcast_station - add broadcast station into station table.
1279  */
1280 int iwl3945_add_bcast_station(struct iwl_priv *priv)
1281 {
1282         int ret;
1283
1284         IWL_DEBUG_INFO(priv, "Adding broadcast station to station table\n");
1285         ret = iwl_add_local_station(priv, iwl_bcast_addr, false);
1286         /*
1287          * It is assumed that when station is added more initialization
1288          * needs to be done, but for 3945 it is not the case and we can
1289          * just release station table access right here.
1290          */
1291         priv->stations[priv->hw_params.bcast_sta_id].used &= ~IWL_STA_UCODE_INPROGRESS;
1292         return ret;
1293
1294 }
1295 EXPORT_SYMBOL(iwl3945_add_bcast_station);
1296
1297 /**
1298  * iwl_get_sta_id - Find station's index within station table
1299  *
1300  * If new IBSS station, create new entry in station table
1301  */
1302 int iwl_get_sta_id(struct iwl_priv *priv, struct ieee80211_hdr *hdr)
1303 {
1304         int sta_id;
1305         __le16 fc = hdr->frame_control;
1306
1307         /* If this frame is broadcast or management, use broadcast station id */
1308         if (!ieee80211_is_data(fc) ||  is_multicast_ether_addr(hdr->addr1))
1309                 return priv->hw_params.bcast_sta_id;
1310
1311         switch (priv->iw_mode) {
1312
1313         /* If we are a client station in a BSS network, use the special
1314          * AP station entry (that's the only station we communicate with) */
1315         case NL80211_IFTYPE_STATION:
1316                 /*
1317                  * If addition of station not complete yet, which means
1318                  * that rate scaling has not been initialized, then return
1319                  * the broadcast station.
1320                  */
1321                 if (!(priv->stations[IWL_AP_ID].used & IWL_STA_UCODE_ACTIVE))
1322                         return priv->hw_params.bcast_sta_id;
1323                 return IWL_AP_ID;
1324
1325         /* If we are an AP, then find the station, or use BCAST */
1326         case NL80211_IFTYPE_AP:
1327                 sta_id = iwl_find_station(priv, hdr->addr1);
1328                 if (sta_id != IWL_INVALID_STATION)
1329                         return sta_id;
1330                 return priv->hw_params.bcast_sta_id;
1331
1332         /* If this frame is going out to an IBSS network, find the station,
1333          * or create a new station table entry */
1334         case NL80211_IFTYPE_ADHOC:
1335                 sta_id = iwl_find_station(priv, hdr->addr1);
1336                 if (sta_id != IWL_INVALID_STATION)
1337                         return sta_id;
1338
1339                 IWL_DEBUG_DROP(priv, "Station %pM not in station map. "
1340                                "Defaulting to broadcast...\n",
1341                                hdr->addr1);
1342                 iwl_print_hex_dump(priv, IWL_DL_DROP, (u8 *) hdr, sizeof(*hdr));
1343                 return priv->hw_params.bcast_sta_id;
1344
1345         default:
1346                 IWL_WARN(priv, "Unknown mode of operation: %d\n",
1347                         priv->iw_mode);
1348                 return priv->hw_params.bcast_sta_id;
1349         }
1350 }
1351 EXPORT_SYMBOL(iwl_get_sta_id);
1352
1353 /**
1354  * iwl_sta_tx_modify_enable_tid - Enable Tx for this TID in station table
1355  */
1356 void iwl_sta_tx_modify_enable_tid(struct iwl_priv *priv, int sta_id, int tid)
1357 {
1358         unsigned long flags;
1359
1360         /* Remove "disable" flag, to enable Tx for this TID */
1361         spin_lock_irqsave(&priv->sta_lock, flags);
1362         priv->stations[sta_id].sta.sta.modify_mask = STA_MODIFY_TID_DISABLE_TX;
1363         priv->stations[sta_id].sta.tid_disable_tx &= cpu_to_le16(~(1 << tid));
1364         priv->stations[sta_id].sta.mode = STA_CONTROL_MODIFY_MSK;
1365         spin_unlock_irqrestore(&priv->sta_lock, flags);
1366
1367         iwl_send_add_sta(priv, &priv->stations[sta_id].sta, CMD_ASYNC);
1368 }
1369 EXPORT_SYMBOL(iwl_sta_tx_modify_enable_tid);
1370
1371 int iwl_sta_rx_agg_start(struct iwl_priv *priv,
1372                          const u8 *addr, int tid, u16 ssn)
1373 {
1374         unsigned long flags;
1375         int sta_id;
1376
1377         sta_id = iwl_find_station(priv, addr);
1378         if (sta_id == IWL_INVALID_STATION)
1379                 return -ENXIO;
1380
1381         spin_lock_irqsave(&priv->sta_lock, flags);
1382         priv->stations[sta_id].sta.station_flags_msk = 0;
1383         priv->stations[sta_id].sta.sta.modify_mask = STA_MODIFY_ADDBA_TID_MSK;
1384         priv->stations[sta_id].sta.add_immediate_ba_tid = (u8)tid;
1385         priv->stations[sta_id].sta.add_immediate_ba_ssn = cpu_to_le16(ssn);
1386         priv->stations[sta_id].sta.mode = STA_CONTROL_MODIFY_MSK;
1387         spin_unlock_irqrestore(&priv->sta_lock, flags);
1388
1389         return iwl_send_add_sta(priv, &priv->stations[sta_id].sta,
1390                                         CMD_ASYNC);
1391 }
1392 EXPORT_SYMBOL(iwl_sta_rx_agg_start);
1393
1394 int iwl_sta_rx_agg_stop(struct iwl_priv *priv, const u8 *addr, int tid)
1395 {
1396         unsigned long flags;
1397         int sta_id;
1398
1399         sta_id = iwl_find_station(priv, addr);
1400         if (sta_id == IWL_INVALID_STATION) {
1401                 IWL_ERR(priv, "Invalid station for AGG tid %d\n", tid);
1402                 return -ENXIO;
1403         }
1404
1405         spin_lock_irqsave(&priv->sta_lock, flags);
1406         priv->stations[sta_id].sta.station_flags_msk = 0;
1407         priv->stations[sta_id].sta.sta.modify_mask = STA_MODIFY_DELBA_TID_MSK;
1408         priv->stations[sta_id].sta.remove_immediate_ba_tid = (u8)tid;
1409         priv->stations[sta_id].sta.mode = STA_CONTROL_MODIFY_MSK;
1410         spin_unlock_irqrestore(&priv->sta_lock, flags);
1411
1412         return iwl_send_add_sta(priv, &priv->stations[sta_id].sta,
1413                                         CMD_ASYNC);
1414 }
1415 EXPORT_SYMBOL(iwl_sta_rx_agg_stop);
1416
1417 void iwl_sta_modify_ps_wake(struct iwl_priv *priv, int sta_id)
1418 {
1419         unsigned long flags;
1420
1421         spin_lock_irqsave(&priv->sta_lock, flags);
1422         priv->stations[sta_id].sta.station_flags &= ~STA_FLG_PWR_SAVE_MSK;
1423         priv->stations[sta_id].sta.station_flags_msk = STA_FLG_PWR_SAVE_MSK;
1424         priv->stations[sta_id].sta.sta.modify_mask = 0;
1425         priv->stations[sta_id].sta.sleep_tx_count = 0;
1426         priv->stations[sta_id].sta.mode = STA_CONTROL_MODIFY_MSK;
1427         spin_unlock_irqrestore(&priv->sta_lock, flags);
1428
1429         iwl_send_add_sta(priv, &priv->stations[sta_id].sta, CMD_ASYNC);
1430 }
1431 EXPORT_SYMBOL(iwl_sta_modify_ps_wake);
1432
1433 void iwl_sta_modify_sleep_tx_count(struct iwl_priv *priv, int sta_id, int cnt)
1434 {
1435         unsigned long flags;
1436
1437         spin_lock_irqsave(&priv->sta_lock, flags);
1438         priv->stations[sta_id].sta.station_flags |= STA_FLG_PWR_SAVE_MSK;
1439         priv->stations[sta_id].sta.station_flags_msk = STA_FLG_PWR_SAVE_MSK;
1440         priv->stations[sta_id].sta.sta.modify_mask =
1441                                         STA_MODIFY_SLEEP_TX_COUNT_MSK;
1442         priv->stations[sta_id].sta.sleep_tx_count = cpu_to_le16(cnt);
1443         priv->stations[sta_id].sta.mode = STA_CONTROL_MODIFY_MSK;
1444         spin_unlock_irqrestore(&priv->sta_lock, flags);
1445
1446         iwl_send_add_sta(priv, &priv->stations[sta_id].sta, CMD_ASYNC);
1447 }
1448 EXPORT_SYMBOL(iwl_sta_modify_sleep_tx_count);
1449
1450 int iwl_mac_sta_remove(struct ieee80211_hw *hw,
1451                                struct ieee80211_vif *vif,
1452                                struct ieee80211_sta *sta)
1453 {
1454         int ret;
1455         struct iwl_priv *priv = hw->priv;
1456         IWL_DEBUG_INFO(priv, "received request to remove station %pM\n",
1457                         sta->addr);
1458         ret = iwl_remove_station(priv, sta->addr);
1459         if (ret)
1460                 IWL_ERR(priv, "Error removing station %pM\n",
1461                         sta->addr);
1462         return ret;
1463 }
1464 EXPORT_SYMBOL(iwl_mac_sta_remove);