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 static 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
 651         priv->stations[sta_id].used &= ~IWL_STA_DRIVER_ACTIVE;
 652
 653         priv->num_stations--;
 654
 655         BUG_ON(priv->num_stations < 0);
 656
 657         station = &priv->stations[sta_id];
 658         spin_unlock_irqrestore(&priv->sta_lock, flags);
 659
 660         ret = iwl_send_remove_station(priv, station);
 661         return ret;
 662 out:
 663         spin_unlock_irqrestore(&priv->sta_lock, flags);
 664         return ret;
 665 }
 666
 667 /**
 668  * iwl_clear_ucode_stations() - clear entire station table driver and/or ucode
 669  * @priv:
 670  * @force: If set then the uCode station table needs to be cleared here. If
 671  *         not set then the uCode station table has already been cleared,
 672  *         for example after sending it a RXON command without ASSOC bit
 673  *         set, and we just need to change driver state here.
 674  */
 675 void iwl_clear_ucode_stations(struct iwl_priv *priv, bool force)
 676 {
 677         int i;
 678         unsigned long flags_spin;
 679         bool cleared = false;
 680
 681         IWL_DEBUG_INFO(priv, "Clearing ucode stations in driver%s\n",
 682                         force ? " and ucode" : "");
 683
 684         if (force) {
 685                 if (!iwl_is_ready(priv)) {
 686                         /*
 687                          * If device is not ready at this point the station
 688                          * table is likely already empty (uCode not ready
 689                          * to receive station requests) or will soon be
 690                          * due to interface going down.
 691                          */
 692                         IWL_DEBUG_INFO(priv, "Unable to remove stations from device - device not ready\n");
 693                 } else {
 694                         iwl_send_cmd_pdu_async(priv, REPLY_REMOVE_ALL_STA, 0, NULL, NULL);
 695                 }
 696         }
 697
 698         spin_lock_irqsave(&priv->sta_lock, flags_spin);
 699         if (force) {
 700                 IWL_DEBUG_INFO(priv, "Clearing all station information in driver\n");
 701                 /*
 702                  * The station entry contains a link to the LQ command. For
 703                  * all stations managed by mac80211 this memory will be
 704                  * managed by it also. For local stations (broadcast and
 705                  * bssid station when in adhoc mode) we need to maintain
 706                  * this lq command separately. This memory is created when
 707                  * these stations are added.
 708                  */
 709                 for (i = 0; i < priv->hw_params.max_stations; i++) {
 710                         if (priv->stations[i].used & IWL_STA_LOCAL) {
 711                                 kfree(priv->stations[i].lq);
 712                                 priv->stations[i].lq = NULL;
 713                         }
 714                 }
 715                 priv->num_stations = 0;
 716                 memset(priv->stations, 0, sizeof(priv->stations));
 717                 cleared = true;
 718         } else {
 719                 for (i = 0; i < priv->hw_params.max_stations; i++) {
 720                         if (priv->stations[i].used & IWL_STA_UCODE_ACTIVE) {
 721                                 IWL_DEBUG_INFO(priv, "Clearing ucode active for station %d\n", i);
 722                                 priv->stations[i].used &= ~IWL_STA_UCODE_ACTIVE;
 723                                 cleared = true;
 724                         }
 725                 }
 726         }
 727         spin_unlock_irqrestore(&priv->sta_lock, flags_spin);
 728
 729         if (!cleared)
 730                 IWL_DEBUG_INFO(priv, "No active stations found to be cleared\n");
 731 }
 732 EXPORT_SYMBOL(iwl_clear_ucode_stations);
 733
 734 /**
 735  * iwl_restore_stations() - Restore driver known stations to device
 736  *
 737  * All stations considered active by driver, but not present in ucode, is
 738  * restored.
 739  *
 740  * Function sleeps.
 741  */
 742 void iwl_restore_stations(struct iwl_priv *priv)
 743 {
 744         struct iwl_station_entry *station;
 745         unsigned long flags_spin;
 746         int i;
 747         bool found = false;
 748         int ret;
 749
 750         if (!iwl_is_ready(priv)) {
 751                 IWL_DEBUG_INFO(priv, "Not ready yet, not restoring any stations.\n");
 752                 return;
 753         }
 754
 755         IWL_DEBUG_ASSOC(priv, "Restoring all known stations ... start.\n");
 756         spin_lock_irqsave(&priv->sta_lock, flags_spin);
 757         for (i = 0; i < priv->hw_params.max_stations; i++) {
 758                 if ((priv->stations[i].used & IWL_STA_DRIVER_ACTIVE) &&
 759                             !(priv->stations[i].used & IWL_STA_UCODE_ACTIVE)) {
 760                         IWL_DEBUG_ASSOC(priv, "Restoring sta %pM\n",
 761                                         priv->stations[i].sta.sta.addr);
 762                         priv->stations[i].sta.mode = 0;
 763                         priv->stations[i].used |= IWL_STA_UCODE_INPROGRESS;
 764                         found = true;
 765                 }
 766         }
 767
 768         for (i = 0; i < priv->hw_params.max_stations; i++) {
 769                 if ((priv->stations[i].used & IWL_STA_UCODE_INPROGRESS)) {
 770                         spin_unlock_irqrestore(&priv->sta_lock, flags_spin);
 771                         station = &priv->stations[i];
 772                         ret = iwl_send_add_sta(priv, &priv->stations[i].sta, CMD_SYNC);
 773                         if (ret) {
 774                                 IWL_ERR(priv, "Adding station %pM failed.\n",
 775                                         station->sta.sta.addr);
 776                                 spin_lock_irqsave(&priv->sta_lock, flags_spin);
 777                                 priv->stations[i].used &= ~IWL_STA_DRIVER_ACTIVE;
 778                                 priv->stations[i].used &= ~IWL_STA_UCODE_INPROGRESS;
 779                                 spin_unlock_irqrestore(&priv->sta_lock, flags_spin);
 780                         }
 781                         /*
 782                          * Rate scaling has already been initialized, send
 783                          * current LQ command
 784                          */
 785                         if (station->lq)
 786                                 iwl_send_lq_cmd(priv, station->lq, CMD_SYNC, true);
 787                         spin_lock_irqsave(&priv->sta_lock, flags_spin);
 788                         priv->stations[i].used &= ~IWL_STA_UCODE_INPROGRESS;
 789                 }
 790         }
 791
 792         spin_unlock_irqrestore(&priv->sta_lock, flags_spin);
 793         if (!found)
 794                 IWL_DEBUG_INFO(priv, "Restoring all known stations .... no stations to be restored.\n");
 795         else
 796                 IWL_DEBUG_INFO(priv, "Restoring all known stations .... complete.\n");
 797 }
 798 EXPORT_SYMBOL(iwl_restore_stations);
 799
 800 int iwl_get_free_ucode_key_index(struct iwl_priv *priv)
 801 {
 802         int i;
 803
 804         for (i = 0; i < STA_KEY_MAX_NUM; i++)
 805                 if (!test_and_set_bit(i, &priv->ucode_key_table))
 806                         return i;
 807
 808         return WEP_INVALID_OFFSET;
 809 }
 810 EXPORT_SYMBOL(iwl_get_free_ucode_key_index);
 811
 812 static int iwl_send_static_wepkey_cmd(struct iwl_priv *priv, u8 send_if_empty)
 813 {
 814         int i, not_empty = 0;
 815         u8 buff[sizeof(struct iwl_wep_cmd) +
 816                 sizeof(struct iwl_wep_key) * WEP_KEYS_MAX];
 817         struct iwl_wep_cmd *wep_cmd = (struct iwl_wep_cmd *)buff;
 818         size_t cmd_size  = sizeof(struct iwl_wep_cmd);
 819         struct iwl_host_cmd cmd = {
 820                 .id = REPLY_WEPKEY,
 821                 .data = wep_cmd,
 822                 .flags = CMD_SYNC,
 823         };
 824
 825         might_sleep();
 826
 827         memset(wep_cmd, 0, cmd_size +
 828                         (sizeof(struct iwl_wep_key) * WEP_KEYS_MAX));
 829
 830         for (i = 0; i < WEP_KEYS_MAX ; i++) {
 831                 wep_cmd->key[i].key_index = i;
 832                 if (priv->wep_keys[i].key_size) {
 833                         wep_cmd->key[i].key_offset = i;
 834                         not_empty = 1;
 835                 } else {
 836                         wep_cmd->key[i].key_offset = WEP_INVALID_OFFSET;
 837                 }
 838
 839                 wep_cmd->key[i].key_size = priv->wep_keys[i].key_size;
 840                 memcpy(&wep_cmd->key[i].key[3], priv->wep_keys[i].key,
 841                                 priv->wep_keys[i].key_size);
 842         }
 843
 844         wep_cmd->global_key_type = WEP_KEY_WEP_TYPE;
 845         wep_cmd->num_keys = WEP_KEYS_MAX;
 846
 847         cmd_size += sizeof(struct iwl_wep_key) * WEP_KEYS_MAX;
 848
 849         cmd.len = cmd_size;
 850
 851         if (not_empty || send_if_empty)
 852                 return iwl_send_cmd(priv, &cmd);
 853         else
 854                 return 0;
 855 }
 856
 857 int iwl_restore_default_wep_keys(struct iwl_priv *priv)
 858 {
 859         WARN_ON(!mutex_is_locked(&priv->mutex));
 860
 861         return iwl_send_static_wepkey_cmd(priv, 0);
 862 }
 863 EXPORT_SYMBOL(iwl_restore_default_wep_keys);
 864
 865 int iwl_remove_default_wep_key(struct iwl_priv *priv,
 866                                struct ieee80211_key_conf *keyconf)
 867 {
 868         int ret;
 869
 870         WARN_ON(!mutex_is_locked(&priv->mutex));
 871
 872         IWL_DEBUG_WEP(priv, "Removing default WEP key: idx=%d\n",
 873                       keyconf->keyidx);
 874
 875         memset(&priv->wep_keys[keyconf->keyidx], 0, sizeof(priv->wep_keys[0]));
 876         if (iwl_is_rfkill(priv)) {
 877                 IWL_DEBUG_WEP(priv, "Not sending REPLY_WEPKEY command due to RFKILL.\n");
 878                 /* but keys in device are clear anyway so return success */
 879                 return 0;
 880         }
 881         ret = iwl_send_static_wepkey_cmd(priv, 1);
 882         IWL_DEBUG_WEP(priv, "Remove default WEP key: idx=%d ret=%d\n",
 883                       keyconf->keyidx, ret);
 884
 885         return ret;
 886 }
 887 EXPORT_SYMBOL(iwl_remove_default_wep_key);
 888
 889 int iwl_set_default_wep_key(struct iwl_priv *priv,
 890                             struct ieee80211_key_conf *keyconf)
 891 {
 892         int ret;
 893
 894         WARN_ON(!mutex_is_locked(&priv->mutex));
 895
 896         if (keyconf->keylen != WEP_KEY_LEN_128 &&
 897             keyconf->keylen != WEP_KEY_LEN_64) {
 898                 IWL_DEBUG_WEP(priv, "Bad WEP key length %d\n", keyconf->keylen);
 899                 return -EINVAL;
 900         }
 901
 902         keyconf->flags &= ~IEEE80211_KEY_FLAG_GENERATE_IV;
 903         keyconf->hw_key_idx = HW_KEY_DEFAULT;
 904         priv->stations[IWL_AP_ID].keyinfo.alg = ALG_WEP;
 905
 906         priv->wep_keys[keyconf->keyidx].key_size = keyconf->keylen;
 907         memcpy(&priv->wep_keys[keyconf->keyidx].key, &keyconf->key,
 908                                                         keyconf->keylen);
 909
 910         ret = iwl_send_static_wepkey_cmd(priv, 0);
 911         IWL_DEBUG_WEP(priv, "Set default WEP key: len=%d idx=%d ret=%d\n",
 912                 keyconf->keylen, keyconf->keyidx, ret);
 913
 914         return ret;
 915 }
 916 EXPORT_SYMBOL(iwl_set_default_wep_key);
 917
 918 static int iwl_set_wep_dynamic_key_info(struct iwl_priv *priv,
 919                                 struct ieee80211_key_conf *keyconf,
 920                                 u8 sta_id)
 921 {
 922         unsigned long flags;
 923         __le16 key_flags = 0;
 924         int ret;
 925
 926         keyconf->flags &= ~IEEE80211_KEY_FLAG_GENERATE_IV;
 927
 928         key_flags |= (STA_KEY_FLG_WEP | STA_KEY_FLG_MAP_KEY_MSK);
 929         key_flags |= cpu_to_le16(keyconf->keyidx << STA_KEY_FLG_KEYID_POS);
 930         key_flags &= ~STA_KEY_FLG_INVALID;
 931
 932         if (keyconf->keylen == WEP_KEY_LEN_128)
 933                 key_flags |= STA_KEY_FLG_KEY_SIZE_MSK;
 934
 935         if (sta_id == priv->hw_params.bcast_sta_id)
 936                 key_flags |= STA_KEY_MULTICAST_MSK;
 937
 938         spin_lock_irqsave(&priv->sta_lock, flags);
 939
 940         priv->stations[sta_id].keyinfo.alg = keyconf->alg;
 941         priv->stations[sta_id].keyinfo.keylen = keyconf->keylen;
 942         priv->stations[sta_id].keyinfo.keyidx = keyconf->keyidx;
 943
 944         memcpy(priv->stations[sta_id].keyinfo.key,
 945                                 keyconf->key, keyconf->keylen);
 946
 947         memcpy(&priv->stations[sta_id].sta.key.key[3],
 948                                 keyconf->key, keyconf->keylen);
 949
 950         if ((priv->stations[sta_id].sta.key.key_flags & STA_KEY_FLG_ENCRYPT_MSK)
 951                         == STA_KEY_FLG_NO_ENC)
 952                 priv->stations[sta_id].sta.key.key_offset =
 953                                  iwl_get_free_ucode_key_index(priv);
 954         /* else, we are overriding an existing key => no need to allocated room
 955          * in uCode. */
 956
 957         WARN(priv->stations[sta_id].sta.key.key_offset == WEP_INVALID_OFFSET,
 958                 "no space for a new key");
 959
 960         priv->stations[sta_id].sta.key.key_flags = key_flags;
 961         priv->stations[sta_id].sta.sta.modify_mask = STA_MODIFY_KEY_MASK;
 962         priv->stations[sta_id].sta.mode = STA_CONTROL_MODIFY_MSK;
 963
 964         ret = iwl_send_add_sta(priv, &priv->stations[sta_id].sta, CMD_ASYNC);
 965
 966         spin_unlock_irqrestore(&priv->sta_lock, flags);
 967
 968         return ret;
 969 }
 970
 971 static int iwl_set_ccmp_dynamic_key_info(struct iwl_priv *priv,
 972                                    struct ieee80211_key_conf *keyconf,
 973                                    u8 sta_id)
 974 {
 975         unsigned long flags;
 976         __le16 key_flags = 0;
 977         int ret;
 978
 979         key_flags |= (STA_KEY_FLG_CCMP | STA_KEY_FLG_MAP_KEY_MSK);
 980         key_flags |= cpu_to_le16(keyconf->keyidx << STA_KEY_FLG_KEYID_POS);
 981         key_flags &= ~STA_KEY_FLG_INVALID;
 982
 983         if (sta_id == priv->hw_params.bcast_sta_id)
 984                 key_flags |= STA_KEY_MULTICAST_MSK;
 985
 986         keyconf->flags |= IEEE80211_KEY_FLAG_GENERATE_IV;
 987
 988         spin_lock_irqsave(&priv->sta_lock, flags);
 989         priv->stations[sta_id].keyinfo.alg = keyconf->alg;
 990         priv->stations[sta_id].keyinfo.keylen = keyconf->keylen;
 991
 992         memcpy(priv->stations[sta_id].keyinfo.key, keyconf->key,
 993                keyconf->keylen);
 994
 995         memcpy(priv->stations[sta_id].sta.key.key, keyconf->key,
 996                keyconf->keylen);
 997
 998         if ((priv->stations[sta_id].sta.key.key_flags & STA_KEY_FLG_ENCRYPT_MSK)
 999                         == STA_KEY_FLG_NO_ENC)
1000                 priv->stations[sta_id].sta.key.key_offset =
1001                                  iwl_get_free_ucode_key_index(priv);
1002         /* else, we are overriding an existing key => no need to allocated room
1003          * in uCode. */
1004
1005         WARN(priv->stations[sta_id].sta.key.key_offset == WEP_INVALID_OFFSET,
1006                 "no space for a new key");
1007
1008         priv->stations[sta_id].sta.key.key_flags = key_flags;
1009         priv->stations[sta_id].sta.sta.modify_mask = STA_MODIFY_KEY_MASK;
1010         priv->stations[sta_id].sta.mode = STA_CONTROL_MODIFY_MSK;
1011
1012         ret = iwl_send_add_sta(priv, &priv->stations[sta_id].sta, CMD_ASYNC);
1013
1014         spin_unlock_irqrestore(&priv->sta_lock, flags);
1015
1016         return ret;
1017 }
1018
1019 static int iwl_set_tkip_dynamic_key_info(struct iwl_priv *priv,
1020                                    struct ieee80211_key_conf *keyconf,
1021                                    u8 sta_id)
1022 {
1023         unsigned long flags;
1024         int ret = 0;
1025         __le16 key_flags = 0;
1026
1027         key_flags |= (STA_KEY_FLG_TKIP | STA_KEY_FLG_MAP_KEY_MSK);
1028         key_flags |= cpu_to_le16(keyconf->keyidx << STA_KEY_FLG_KEYID_POS);
1029         key_flags &= ~STA_KEY_FLG_INVALID;
1030
1031         if (sta_id == priv->hw_params.bcast_sta_id)
1032                 key_flags |= STA_KEY_MULTICAST_MSK;
1033
1034         keyconf->flags |= IEEE80211_KEY_FLAG_GENERATE_IV;
1035         keyconf->flags |= IEEE80211_KEY_FLAG_GENERATE_MMIC;
1036
1037         spin_lock_irqsave(&priv->sta_lock, flags);
1038
1039         priv->stations[sta_id].keyinfo.alg = keyconf->alg;
1040         priv->stations[sta_id].keyinfo.keylen = 16;
1041
1042         if ((priv->stations[sta_id].sta.key.key_flags & STA_KEY_FLG_ENCRYPT_MSK)
1043                         == STA_KEY_FLG_NO_ENC)
1044                 priv->stations[sta_id].sta.key.key_offset =
1045                                  iwl_get_free_ucode_key_index(priv);
1046         /* else, we are overriding an existing key => no need to allocated room
1047          * in uCode. */
1048
1049         WARN(priv->stations[sta_id].sta.key.key_offset == WEP_INVALID_OFFSET,
1050                 "no space for a new key");
1051
1052         priv->stations[sta_id].sta.key.key_flags = key_flags;
1053
1054
1055         /* This copy is acutally not needed: we get the key with each TX */
1056         memcpy(priv->stations[sta_id].keyinfo.key, keyconf->key, 16);
1057
1058         memcpy(priv->stations[sta_id].sta.key.key, keyconf->key, 16);
1059
1060         spin_unlock_irqrestore(&priv->sta_lock, flags);
1061
1062         return ret;
1063 }
1064
1065 void iwl_update_tkip_key(struct iwl_priv *priv,
1066                         struct ieee80211_key_conf *keyconf,
1067                         const u8 *addr, u32 iv32, u16 *phase1key)
1068 {
1069         u8 sta_id = IWL_INVALID_STATION;
1070         unsigned long flags;
1071         int i;
1072
1073         sta_id = iwl_find_station(priv, addr);
1074         if (sta_id == IWL_INVALID_STATION) {
1075                 IWL_DEBUG_MAC80211(priv, "leave - %pM not in station map.\n",
1076                                    addr);
1077                 return;
1078         }
1079
1080         if (iwl_scan_cancel(priv)) {
1081                 /* cancel scan failed, just live w/ bad key and rely
1082                    briefly on SW decryption */
1083                 return;
1084         }
1085
1086         spin_lock_irqsave(&priv->sta_lock, flags);
1087
1088         priv->stations[sta_id].sta.key.tkip_rx_tsc_byte2 = (u8) iv32;
1089
1090         for (i = 0; i < 5; i++)
1091                 priv->stations[sta_id].sta.key.tkip_rx_ttak[i] =
1092                         cpu_to_le16(phase1key[i]);
1093
1094         priv->stations[sta_id].sta.sta.modify_mask = STA_MODIFY_KEY_MASK;
1095         priv->stations[sta_id].sta.mode = STA_CONTROL_MODIFY_MSK;
1096
1097         iwl_send_add_sta(priv, &priv->stations[sta_id].sta, CMD_ASYNC);
1098
1099         spin_unlock_irqrestore(&priv->sta_lock, flags);
1100
1101 }
1102 EXPORT_SYMBOL(iwl_update_tkip_key);
1103
1104 int iwl_remove_dynamic_key(struct iwl_priv *priv,
1105                                 struct ieee80211_key_conf *keyconf,
1106                                 u8 sta_id)
1107 {
1108         unsigned long flags;
1109         int ret = 0;
1110         u16 key_flags;
1111         u8 keyidx;
1112
1113         priv->key_mapping_key--;
1114
1115         spin_lock_irqsave(&priv->sta_lock, flags);
1116         key_flags = le16_to_cpu(priv->stations[sta_id].sta.key.key_flags);
1117         keyidx = (key_flags >> STA_KEY_FLG_KEYID_POS) & 0x3;
1118
1119         IWL_DEBUG_WEP(priv, "Remove dynamic key: idx=%d sta=%d\n",
1120                       keyconf->keyidx, sta_id);
1121
1122         if (keyconf->keyidx != keyidx) {
1123                 /* We need to remove a key with index different that the one
1124                  * in the uCode. This means that the key we need to remove has
1125                  * been replaced by another one with different index.
1126                  * Don't do anything and return ok
1127                  */
1128                 spin_unlock_irqrestore(&priv->sta_lock, flags);
1129                 return 0;
1130         }
1131
1132         if (priv->stations[sta_id].sta.key.key_offset == WEP_INVALID_OFFSET) {
1133                 IWL_WARN(priv, "Removing wrong key %d 0x%x\n",
1134                             keyconf->keyidx, key_flags);
1135                 spin_unlock_irqrestore(&priv->sta_lock, flags);
1136                 return 0;
1137         }
1138
1139         if (!test_and_clear_bit(priv->stations[sta_id].sta.key.key_offset,
1140                 &priv->ucode_key_table))
1141                 IWL_ERR(priv, "index %d not used in uCode key table.\n",
1142                         priv->stations[sta_id].sta.key.key_offset);
1143         memset(&priv->stations[sta_id].keyinfo, 0,
1144                                         sizeof(struct iwl_hw_key));
1145         memset(&priv->stations[sta_id].sta.key, 0,
1146                                         sizeof(struct iwl4965_keyinfo));
1147         priv->stations[sta_id].sta.key.key_flags =
1148                         STA_KEY_FLG_NO_ENC | STA_KEY_FLG_INVALID;
1149         priv->stations[sta_id].sta.key.key_offset = WEP_INVALID_OFFSET;
1150         priv->stations[sta_id].sta.sta.modify_mask = STA_MODIFY_KEY_MASK;
1151         priv->stations[sta_id].sta.mode = STA_CONTROL_MODIFY_MSK;
1152
1153         if (iwl_is_rfkill(priv)) {
1154                 IWL_DEBUG_WEP(priv, "Not sending REPLY_ADD_STA command because RFKILL enabled.\n");
1155                 spin_unlock_irqrestore(&priv->sta_lock, flags);
1156                 return 0;
1157         }
1158         ret =  iwl_send_add_sta(priv, &priv->stations[sta_id].sta, CMD_ASYNC);
1159         spin_unlock_irqrestore(&priv->sta_lock, flags);
1160         return ret;
1161 }
1162 EXPORT_SYMBOL(iwl_remove_dynamic_key);
1163
1164 int iwl_set_dynamic_key(struct iwl_priv *priv,
1165                                 struct ieee80211_key_conf *keyconf, u8 sta_id)
1166 {
1167         int ret;
1168
1169         priv->key_mapping_key++;
1170         keyconf->hw_key_idx = HW_KEY_DYNAMIC;
1171
1172         switch (keyconf->alg) {
1173         case ALG_CCMP:
1174                 ret = iwl_set_ccmp_dynamic_key_info(priv, keyconf, sta_id);
1175                 break;
1176         case ALG_TKIP:
1177                 ret = iwl_set_tkip_dynamic_key_info(priv, keyconf, sta_id);
1178                 break;
1179         case ALG_WEP:
1180                 ret = iwl_set_wep_dynamic_key_info(priv, keyconf, sta_id);
1181                 break;
1182         default:
1183                 IWL_ERR(priv,
1184                         "Unknown alg: %s alg = %d\n", __func__, keyconf->alg);
1185                 ret = -EINVAL;
1186         }
1187
1188         IWL_DEBUG_WEP(priv, "Set dynamic key: alg= %d len=%d idx=%d sta=%d ret=%d\n",
1189                       keyconf->alg, keyconf->keylen, keyconf->keyidx,
1190                       sta_id, ret);
1191
1192         return ret;
1193 }
1194 EXPORT_SYMBOL(iwl_set_dynamic_key);
1195
1196 #ifdef CONFIG_IWLWIFI_DEBUG
1197 static void iwl_dump_lq_cmd(struct iwl_priv *priv,
1198                            struct iwl_link_quality_cmd *lq)
1199 {
1200         int i;
1201         IWL_DEBUG_RATE(priv, "lq station id 0x%x\n", lq->sta_id);
1202         IWL_DEBUG_RATE(priv, "lq ant 0x%X 0x%X\n",
1203                        lq->general_params.single_stream_ant_msk,
1204                        lq->general_params.dual_stream_ant_msk);
1205
1206         for (i = 0; i < LINK_QUAL_MAX_RETRY_NUM; i++)
1207                 IWL_DEBUG_RATE(priv, "lq index %d 0x%X\n",
1208                                i, lq->rs_table[i].rate_n_flags);
1209 }
1210 #else
1211 static inline void iwl_dump_lq_cmd(struct iwl_priv *priv,
1212                                    struct iwl_link_quality_cmd *lq)
1213 {
1214 }
1215 #endif
1216
1217 /**
1218  * iwl_send_lq_cmd() - Send link quality command
1219  * @init: This command is sent as part of station initialization right
1220  *        after station has been added.
1221  *
1222  * The link quality command is sent as the last step of station creation.
1223  * This is the special case in which init is set and we call a callback in
1224  * this case to clear the state indicating that station creation is in
1225  * progress.
1226  */
1227 int iwl_send_lq_cmd(struct iwl_priv *priv,
1228                     struct iwl_link_quality_cmd *lq, u8 flags, bool init)
1229 {
1230         int ret = 0;
1231         unsigned long flags_spin;
1232
1233         struct iwl_host_cmd cmd = {
1234                 .id = REPLY_TX_LINK_QUALITY_CMD,
1235                 .len = sizeof(struct iwl_link_quality_cmd),
1236                 .flags = flags,
1237                 .data = lq,
1238         };
1239
1240         if (WARN_ON(lq->sta_id == IWL_INVALID_STATION))
1241                 return -EINVAL;
1242
1243         iwl_dump_lq_cmd(priv, lq);
1244         BUG_ON(init && (cmd.flags & CMD_ASYNC));
1245
1246         ret = iwl_send_cmd(priv, &cmd);
1247
1248         if (cmd.flags & CMD_ASYNC)
1249                 return ret;
1250
1251         if (init) {
1252                 IWL_DEBUG_INFO(priv, "init LQ command complete, clearing sta addition status for sta %d\n",
1253                                lq->sta_id);
1254                 spin_lock_irqsave(&priv->sta_lock, flags_spin);
1255                 priv->stations[lq->sta_id].used &= ~IWL_STA_UCODE_INPROGRESS;
1256                 spin_unlock_irqrestore(&priv->sta_lock, flags_spin);
1257         }
1258         return ret;
1259 }
1260 EXPORT_SYMBOL(iwl_send_lq_cmd);
1261
1262 /**
1263  * iwl_add_bcast_station - add broadcast station into station table.
1264  */
1265 int iwl_add_bcast_station(struct iwl_priv *priv)
1266 {
1267         IWL_DEBUG_INFO(priv, "Adding broadcast station to station table\n");
1268         return iwl_add_local_station(priv, iwl_bcast_addr, true);
1269 }
1270 EXPORT_SYMBOL(iwl_add_bcast_station);
1271
1272 /**
1273  * iwl3945_add_bcast_station - add broadcast station into station table.
1274  */
1275 int iwl3945_add_bcast_station(struct iwl_priv *priv)
1276 {
1277         int ret;
1278
1279         IWL_DEBUG_INFO(priv, "Adding broadcast station to station table\n");
1280         ret = iwl_add_local_station(priv, iwl_bcast_addr, false);
1281         /*
1282          * It is assumed that when station is added more initialization
1283          * needs to be done, but for 3945 it is not the case and we can
1284          * just release station table access right here.
1285          */
1286         priv->stations[priv->hw_params.bcast_sta_id].used &= ~IWL_STA_UCODE_INPROGRESS;
1287         return ret;
1288
1289 }
1290 EXPORT_SYMBOL(iwl3945_add_bcast_station);
1291
1292 /**
1293  * iwl_get_sta_id - Find station's index within station table
1294  *
1295  * If new IBSS station, create new entry in station table
1296  */
1297 int iwl_get_sta_id(struct iwl_priv *priv, struct ieee80211_hdr *hdr)
1298 {
1299         int sta_id;
1300         __le16 fc = hdr->frame_control;
1301
1302         /* If this frame is broadcast or management, use broadcast station id */
1303         if (!ieee80211_is_data(fc) ||  is_multicast_ether_addr(hdr->addr1))
1304                 return priv->hw_params.bcast_sta_id;
1305
1306         switch (priv->iw_mode) {
1307
1308         /* If we are a client station in a BSS network, use the special
1309          * AP station entry (that's the only station we communicate with) */
1310         case NL80211_IFTYPE_STATION:
1311                 /*
1312                  * If addition of station not complete yet, which means
1313                  * that rate scaling has not been initialized, then return
1314                  * the broadcast station.
1315                  */
1316                 if (!(priv->stations[IWL_AP_ID].used & IWL_STA_UCODE_ACTIVE))
1317                         return priv->hw_params.bcast_sta_id;
1318                 return IWL_AP_ID;
1319
1320         /* If we are an AP, then find the station, or use BCAST */
1321         case NL80211_IFTYPE_AP:
1322                 sta_id = iwl_find_station(priv, hdr->addr1);
1323                 if (sta_id != IWL_INVALID_STATION)
1324                         return sta_id;
1325                 return priv->hw_params.bcast_sta_id;
1326
1327         /* If this frame is going out to an IBSS network, find the station,
1328          * or create a new station table entry */
1329         case NL80211_IFTYPE_ADHOC:
1330                 sta_id = iwl_find_station(priv, hdr->addr1);
1331                 if (sta_id != IWL_INVALID_STATION)
1332                         return sta_id;
1333
1334                 IWL_DEBUG_DROP(priv, "Station %pM not in station map. "
1335                                "Defaulting to broadcast...\n",
1336                                hdr->addr1);
1337                 iwl_print_hex_dump(priv, IWL_DL_DROP, (u8 *) hdr, sizeof(*hdr));
1338                 return priv->hw_params.bcast_sta_id;
1339
1340         default:
1341                 IWL_WARN(priv, "Unknown mode of operation: %d\n",
1342                         priv->iw_mode);
1343                 return priv->hw_params.bcast_sta_id;
1344         }
1345 }
1346 EXPORT_SYMBOL(iwl_get_sta_id);
1347
1348 /**
1349  * iwl_sta_tx_modify_enable_tid - Enable Tx for this TID in station table
1350  */
1351 void iwl_sta_tx_modify_enable_tid(struct iwl_priv *priv, int sta_id, int tid)
1352 {
1353         unsigned long flags;
1354
1355         /* Remove "disable" flag, to enable Tx for this TID */
1356         spin_lock_irqsave(&priv->sta_lock, flags);
1357         priv->stations[sta_id].sta.sta.modify_mask = STA_MODIFY_TID_DISABLE_TX;
1358         priv->stations[sta_id].sta.tid_disable_tx &= cpu_to_le16(~(1 << tid));
1359         priv->stations[sta_id].sta.mode = STA_CONTROL_MODIFY_MSK;
1360         spin_unlock_irqrestore(&priv->sta_lock, flags);
1361
1362         iwl_send_add_sta(priv, &priv->stations[sta_id].sta, CMD_ASYNC);
1363 }
1364 EXPORT_SYMBOL(iwl_sta_tx_modify_enable_tid);
1365
1366 int iwl_sta_rx_agg_start(struct iwl_priv *priv,
1367                          const u8 *addr, int tid, u16 ssn)
1368 {
1369         unsigned long flags;
1370         int sta_id;
1371
1372         sta_id = iwl_find_station(priv, addr);
1373         if (sta_id == IWL_INVALID_STATION)
1374                 return -ENXIO;
1375
1376         spin_lock_irqsave(&priv->sta_lock, flags);
1377         priv->stations[sta_id].sta.station_flags_msk = 0;
1378         priv->stations[sta_id].sta.sta.modify_mask = STA_MODIFY_ADDBA_TID_MSK;
1379         priv->stations[sta_id].sta.add_immediate_ba_tid = (u8)tid;
1380         priv->stations[sta_id].sta.add_immediate_ba_ssn = cpu_to_le16(ssn);
1381         priv->stations[sta_id].sta.mode = STA_CONTROL_MODIFY_MSK;
1382         spin_unlock_irqrestore(&priv->sta_lock, flags);
1383
1384         return iwl_send_add_sta(priv, &priv->stations[sta_id].sta,
1385                                         CMD_ASYNC);
1386 }
1387 EXPORT_SYMBOL(iwl_sta_rx_agg_start);
1388
1389 int iwl_sta_rx_agg_stop(struct iwl_priv *priv, const u8 *addr, int tid)
1390 {
1391         unsigned long flags;
1392         int sta_id;
1393
1394         sta_id = iwl_find_station(priv, addr);
1395         if (sta_id == IWL_INVALID_STATION) {
1396                 IWL_ERR(priv, "Invalid station for AGG tid %d\n", tid);
1397                 return -ENXIO;
1398         }
1399
1400         spin_lock_irqsave(&priv->sta_lock, flags);
1401         priv->stations[sta_id].sta.station_flags_msk = 0;
1402         priv->stations[sta_id].sta.sta.modify_mask = STA_MODIFY_DELBA_TID_MSK;
1403         priv->stations[sta_id].sta.remove_immediate_ba_tid = (u8)tid;
1404         priv->stations[sta_id].sta.mode = STA_CONTROL_MODIFY_MSK;
1405         spin_unlock_irqrestore(&priv->sta_lock, flags);
1406
1407         return iwl_send_add_sta(priv, &priv->stations[sta_id].sta,
1408                                         CMD_ASYNC);
1409 }
1410 EXPORT_SYMBOL(iwl_sta_rx_agg_stop);
1411
1412 void iwl_sta_modify_ps_wake(struct iwl_priv *priv, int sta_id)
1413 {
1414         unsigned long flags;
1415
1416         spin_lock_irqsave(&priv->sta_lock, flags);
1417         priv->stations[sta_id].sta.station_flags &= ~STA_FLG_PWR_SAVE_MSK;
1418         priv->stations[sta_id].sta.station_flags_msk = STA_FLG_PWR_SAVE_MSK;
1419         priv->stations[sta_id].sta.sta.modify_mask = 0;
1420         priv->stations[sta_id].sta.sleep_tx_count = 0;
1421         priv->stations[sta_id].sta.mode = STA_CONTROL_MODIFY_MSK;
1422         spin_unlock_irqrestore(&priv->sta_lock, flags);
1423
1424         iwl_send_add_sta(priv, &priv->stations[sta_id].sta, CMD_ASYNC);
1425 }
1426 EXPORT_SYMBOL(iwl_sta_modify_ps_wake);
1427
1428 void iwl_sta_modify_sleep_tx_count(struct iwl_priv *priv, int sta_id, int cnt)
1429 {
1430         unsigned long flags;
1431
1432         spin_lock_irqsave(&priv->sta_lock, flags);
1433         priv->stations[sta_id].sta.station_flags |= STA_FLG_PWR_SAVE_MSK;
1434         priv->stations[sta_id].sta.station_flags_msk = STA_FLG_PWR_SAVE_MSK;
1435         priv->stations[sta_id].sta.sta.modify_mask =
1436                                         STA_MODIFY_SLEEP_TX_COUNT_MSK;
1437         priv->stations[sta_id].sta.sleep_tx_count = cpu_to_le16(cnt);
1438         priv->stations[sta_id].sta.mode = STA_CONTROL_MODIFY_MSK;
1439         spin_unlock_irqrestore(&priv->sta_lock, flags);
1440
1441         iwl_send_add_sta(priv, &priv->stations[sta_id].sta, CMD_ASYNC);
1442 }
1443 EXPORT_SYMBOL(iwl_sta_modify_sleep_tx_count);
1444
1445 int iwl_mac_sta_remove(struct ieee80211_hw *hw,
1446                                struct ieee80211_vif *vif,
1447                                struct ieee80211_sta *sta)
1448 {
1449         int ret;
1450         struct iwl_priv *priv = hw->priv;
1451         IWL_DEBUG_INFO(priv, "received request to remove station %pM\n",
1452                         sta->addr);
1453         ret = iwl_remove_station(priv, sta->addr);
1454         if (ret)
1455                 IWL_ERR(priv, "Error removing station %pM\n",
1456                         sta->addr);
1457         return ret;
1458 }
1459 EXPORT_SYMBOL(iwl_mac_sta_remove);