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