drivers/net/wireless/iwlwifi/iwl-sta.c

   1 /******************************************************************************
   2  *
   3  * Copyright(c) 2003 - 2010 Intel Corporation. All rights reserved.
   4  *
   5  * Portions of this file are derived from the ipw3945 project, as well
   6  * as portions of the ieee80211 subsystem header files.
   7  *
   8  * This program is free software; you can redistribute it and/or modify it
   9  * under the terms of version 2 of the GNU General Public License as
  10  * published by the Free Software Foundation.
  11  *
  12  * This program is distributed in the hope that it will be useful, but WITHOUT
  13  * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
  14  * FITNESS FOR A PARTICULAR PURPOSE.  See the GNU General Public License for
  15  * more details.
  16  *
  17  * You should have received a copy of the GNU General Public License along with
  18  * this program; if not, write to the Free Software Foundation, Inc.,
  19  * 51 Franklin Street, Fifth Floor, Boston, MA 02110, USA
  20  *
  21  * The full GNU General Public License is included in this distribution in the
  22  * file called LICENSE.
  23  *
  24  * Contact Information:
  25  *  Intel Linux Wireless <ilw@linux.intel.com>
  26  * Intel Corporation, 5200 N.E. Elam Young Parkway, Hillsboro, OR 97124-6497
  27  *
  28  *****************************************************************************/
  29
  30 #include <net/mac80211.h>
  31 #include <linux/etherdevice.h>
  32 #include <linux/sched.h>
  33
  34 #include "iwl-dev.h"
  35 #include "iwl-core.h"
  36 #include "iwl-sta.h"
  37
  38 u8 iwl_find_station(struct iwl_priv *priv, const u8 *addr)
  39 {
  40         int i;
  41         int start = 0;
  42         int ret = IWL_INVALID_STATION;
  43         unsigned long flags;
  44
  45         if ((priv->iw_mode == NL80211_IFTYPE_ADHOC) ||
  46             (priv->iw_mode == NL80211_IFTYPE_AP))
  47                 start = IWL_STA_ID;
  48
  49         if (is_broadcast_ether_addr(addr))
  50                 return priv->hw_params.bcast_sta_id;
  51
  52         spin_lock_irqsave(&priv->sta_lock, flags);
  53         for (i = start; i < priv->hw_params.max_stations; i++)
  54                 if (priv->stations[i].used &&
  55                     (!compare_ether_addr(priv->stations[i].sta.sta.addr,
  56                                          addr))) {
  57                         ret = i;
  58                         goto out;
  59                 }
  60
  61         IWL_DEBUG_ASSOC_LIMIT(priv, "can not find STA %pM total %d\n",
  62                               addr, priv->num_stations);
  63
  64  out:
  65         /*
  66          * It may be possible that more commands interacting with stations
  67          * arrive before we completed processing the adding of
  68          * station
  69          */
  70         if (ret != IWL_INVALID_STATION &&
  71             (!(priv->stations[ret].used & IWL_STA_UCODE_ACTIVE) ||
  72              ((priv->stations[ret].used & IWL_STA_UCODE_ACTIVE) &&
  73               (priv->stations[ret].used & IWL_STA_UCODE_INPROGRESS)))) {
  74                 IWL_ERR(priv, "Requested station info for sta %d before ready.\n",
  75                         ret);
  76                 ret = IWL_INVALID_STATION;
  77         }
  78         spin_unlock_irqrestore(&priv->sta_lock, flags);
  79         return ret;
  80 }
  81 EXPORT_SYMBOL(iwl_find_station);
  82
  83 /* priv->sta_lock must be held */
  84 static void iwl_sta_ucode_activate(struct iwl_priv *priv, u8 sta_id)
  85 {
  86
  87         if (!(priv->stations[sta_id].used & IWL_STA_DRIVER_ACTIVE))
  88                 IWL_ERR(priv, "ACTIVATE a non DRIVER active station id %u addr %pM\n",
  89                         sta_id, priv->stations[sta_id].sta.sta.addr);
  90
  91         if (priv->stations[sta_id].used & IWL_STA_UCODE_ACTIVE) {
  92                 IWL_DEBUG_ASSOC(priv,
  93                                 "STA id %u addr %pM already present in uCode (according to driver)\n",
  94                                 sta_id, priv->stations[sta_id].sta.sta.addr);
  95         } else {
  96                 priv->stations[sta_id].used |= IWL_STA_UCODE_ACTIVE;
  97                 IWL_DEBUG_ASSOC(priv, "Added STA id %u addr %pM to uCode\n",
  98                                 sta_id, priv->stations[sta_id].sta.sta.addr);
  99         }
 100 }
 101
 102 static void iwl_process_add_sta_resp(struct iwl_priv *priv,
 103                                      struct iwl_addsta_cmd *addsta,
 104                                      struct iwl_rx_packet *pkt,
 105                                      bool sync)
 106 {
 107         u8 sta_id = addsta->sta.sta_id;
 108         unsigned long flags;
 109
 110         if (pkt->hdr.flags & IWL_CMD_FAILED_MSK) {
 111                 IWL_ERR(priv, "Bad return from REPLY_ADD_STA (0x%08X)\n",
 112                         pkt->hdr.flags);
 113                 return;
 114         }
 115
 116         IWL_DEBUG_INFO(priv, "Processing response for adding station %u\n",
 117                        sta_id);
 118
 119         spin_lock_irqsave(&priv->sta_lock, flags);
 120
 121         switch (pkt->u.add_sta.status) {
 122         case ADD_STA_SUCCESS_MSK:
 123                 IWL_DEBUG_INFO(priv, "REPLY_ADD_STA PASSED\n");
 124                 iwl_sta_ucode_activate(priv, sta_id);
 125                 break;
 126         case ADD_STA_NO_ROOM_IN_TABLE:
 127                 IWL_ERR(priv, "Adding station %d failed, no room in table.\n",
 128                         sta_id);
 129                 break;
 130         case ADD_STA_NO_BLOCK_ACK_RESOURCE:
 131                 IWL_ERR(priv, "Adding station %d failed, no block ack resource.\n",
 132                         sta_id);
 133                 break;
 134         case ADD_STA_MODIFY_NON_EXIST_STA:
 135                 IWL_ERR(priv, "Attempting to modify non-existing station %d\n",
 136                         sta_id);
 137                 break;
 138         default:
 139                 IWL_DEBUG_ASSOC(priv, "Received REPLY_ADD_STA:(0x%08X)\n",
 140                                 pkt->u.add_sta.status);
 141                 break;
 142         }
 143
 144         IWL_DEBUG_INFO(priv, "%s station id %u addr %pM\n",
 145                        priv->stations[sta_id].sta.mode ==
 146                        STA_CONTROL_MODIFY_MSK ?  "Modified" : "Added",
 147                        sta_id, priv->stations[sta_id].sta.sta.addr);
 148
 149         /*
 150          * XXX: The MAC address in the command buffer is often changed from
 151          * the original sent to the device. That is, the MAC address
 152          * written to the command buffer often is not the same MAC adress
 153          * read from the command buffer when the command returns. This
 154          * issue has not yet been resolved and this debugging is left to
 155          * observe the problem.
 156          */
 157         IWL_DEBUG_INFO(priv, "%s station according to cmd buffer %pM\n",
 158                        priv->stations[sta_id].sta.mode ==
 159                        STA_CONTROL_MODIFY_MSK ? "Modified" : "Added",
 160                        addsta->sta.addr);
 161         spin_unlock_irqrestore(&priv->sta_lock, flags);
 162 }
 163
 164 static void iwl_add_sta_callback(struct iwl_priv *priv,
 165                                  struct iwl_device_cmd *cmd,
 166                                  struct iwl_rx_packet *pkt)
 167 {
 168         struct iwl_addsta_cmd *addsta =
 169                 (struct iwl_addsta_cmd *)cmd->cmd.payload;
 170
 171         iwl_process_add_sta_resp(priv, addsta, pkt, false);
 172
 173 }
 174
 175 int iwl_send_add_sta(struct iwl_priv *priv,
 176                      struct iwl_addsta_cmd *sta, u8 flags)
 177 {
 178         struct iwl_rx_packet *pkt = NULL;
 179         int ret = 0;
 180         u8 data[sizeof(*sta)];
 181         struct iwl_host_cmd cmd = {
 182                 .id = REPLY_ADD_STA,
 183                 .flags = flags,
 184                 .data = data,
 185         };
 186         u8 sta_id __maybe_unused = sta->sta.sta_id;
 187
 188         IWL_DEBUG_INFO(priv, "Adding sta %u (%pM) %ssynchronously\n",
 189                        sta_id, sta->sta.addr, flags & CMD_ASYNC ?  "a" : "");
 190
 191         if (flags & CMD_ASYNC)
 192                 cmd.callback = iwl_add_sta_callback;
 193         else
 194                 cmd.flags |= CMD_WANT_SKB;
 195
 196         cmd.len = priv->cfg->ops->utils->build_addsta_hcmd(sta, data);
 197         ret = iwl_send_cmd(priv, &cmd);
 198
 199         if (ret || (flags & CMD_ASYNC))
 200                 return ret;
 201
 202         if (ret == 0) {
 203                 pkt = (struct iwl_rx_packet *)cmd.reply_page;
 204                 iwl_process_add_sta_resp(priv, sta, pkt, true);
 205         }
 206         iwl_free_pages(priv, cmd.reply_page);
 207
 208         return ret;
 209 }
 210 EXPORT_SYMBOL(iwl_send_add_sta);
 211
 212 static void iwl_set_ht_add_station(struct iwl_priv *priv, u8 index,
 213                                    struct ieee80211_sta_ht_cap *sta_ht_inf)
 214 {
 215         __le32 sta_flags;
 216         u8 mimo_ps_mode;
 217
 218         if (!sta_ht_inf || !sta_ht_inf->ht_supported)
 219                 goto done;
 220
 221         mimo_ps_mode = (sta_ht_inf->cap & IEEE80211_HT_CAP_SM_PS) >> 2;
 222         IWL_DEBUG_ASSOC(priv, "spatial multiplexing power save mode: %s\n",
 223                         (mimo_ps_mode == WLAN_HT_CAP_SM_PS_STATIC) ?
 224                         "static" :
 225                         (mimo_ps_mode == WLAN_HT_CAP_SM_PS_DYNAMIC) ?
 226                         "dynamic" : "disabled");
 227
 228         sta_flags = priv->stations[index].sta.station_flags;
 229
 230         sta_flags &= ~(STA_FLG_RTS_MIMO_PROT_MSK | STA_FLG_MIMO_DIS_MSK);
 231
 232         switch (mimo_ps_mode) {
 233         case WLAN_HT_CAP_SM_PS_STATIC:
 234                 sta_flags |= STA_FLG_MIMO_DIS_MSK;
 235                 break;
 236         case WLAN_HT_CAP_SM_PS_DYNAMIC:
 237                 sta_flags |= STA_FLG_RTS_MIMO_PROT_MSK;
 238                 break;
 239         case WLAN_HT_CAP_SM_PS_DISABLED:
 240                 break;
 241         default:
 242                 IWL_WARN(priv, "Invalid MIMO PS mode %d\n", mimo_ps_mode);
 243                 break;
 244         }
 245
 246         sta_flags |= cpu_to_le32(
 247               (u32)sta_ht_inf->ampdu_factor << STA_FLG_MAX_AGG_SIZE_POS);
 248
 249         sta_flags |= cpu_to_le32(
 250               (u32)sta_ht_inf->ampdu_density << STA_FLG_AGG_MPDU_DENSITY_POS);
 251
 252         if (iwl_is_ht40_tx_allowed(priv, sta_ht_inf))
 253                 sta_flags |= STA_FLG_HT40_EN_MSK;
 254         else
 255                 sta_flags &= ~STA_FLG_HT40_EN_MSK;
 256
 257         priv->stations[index].sta.station_flags = sta_flags;
 258  done:
 259         return;
 260 }
 261
 262 /**
 263  * iwl_prep_station - Prepare station information for addition
 264  *
 265  * should be called with sta_lock held
 266  */
 267 static u8 iwl_prep_station(struct iwl_priv *priv, const u8 *addr,
 268                            bool is_ap,
 269                            struct ieee80211_sta_ht_cap *ht_info)
 270 {
 271         struct iwl_station_entry *station;
 272         int i;
 273         u8 sta_id = IWL_INVALID_STATION;
 274         u16 rate;
 275
 276         if (is_ap)
 277                 sta_id = IWL_AP_ID;
 278         else if (is_broadcast_ether_addr(addr))
 279                 sta_id = priv->hw_params.bcast_sta_id;
 280         else
 281                 for (i = IWL_STA_ID; i < priv->hw_params.max_stations; i++) {
 282                         if (!compare_ether_addr(priv->stations[i].sta.sta.addr,
 283                                                 addr)) {
 284                                 sta_id = i;
 285                                 break;
 286                         }
 287
 288                         if (!priv->stations[i].used &&
 289                             sta_id == IWL_INVALID_STATION)
 290                                 sta_id = i;
 291                 }
 292
 293         /*
 294          * These two conditions have the same outcome, but keep them
 295          * separate
 296          */
 297         if (unlikely(sta_id == IWL_INVALID_STATION))
 298                 return sta_id;
 299
 300         /*
 301          * uCode is not able to deal with multiple requests to add a
 302          * station. Keep track if one is in progress so that we do not send
 303          * another.
 304          */
 305         if (priv->stations[sta_id].used & IWL_STA_UCODE_INPROGRESS) {
 306                 IWL_DEBUG_INFO(priv, "STA %d already in process of being added.\n",
 307                                 sta_id);
 308                 return sta_id;
 309         }
 310
 311         if ((priv->stations[sta_id].used & IWL_STA_DRIVER_ACTIVE) &&
 312             (priv->stations[sta_id].used & IWL_STA_UCODE_ACTIVE) &&
 313             !compare_ether_addr(priv->stations[sta_id].sta.sta.addr, addr)) {
 314                 IWL_DEBUG_ASSOC(priv, "STA %d (%pM) already added, not adding again.\n",
 315                                 sta_id, addr);
 316                 return sta_id;
 317         }
 318
 319         station = &priv->stations[sta_id];
 320         station->used = IWL_STA_DRIVER_ACTIVE;
 321         IWL_DEBUG_ASSOC(priv, "Add STA to driver ID %d: %pM\n",
 322                         sta_id, addr);
 323         priv->num_stations++;
 324
 325         /* Set up the REPLY_ADD_STA command to send to device */
 326         memset(&station->sta, 0, sizeof(struct iwl_addsta_cmd));
 327         memcpy(station->sta.sta.addr, addr, ETH_ALEN);
 328         station->sta.mode = 0;
 329         station->sta.sta.sta_id = sta_id;
 330         station->sta.station_flags = 0;
 331
 332         /* BCAST station and IBSS stations do not work in HT mode */
 333         if (sta_id != priv->hw_params.bcast_sta_id &&
 334             priv->iw_mode != NL80211_IFTYPE_ADHOC)
 335                 iwl_set_ht_add_station(priv, sta_id, ht_info);
 336
 337         /* 3945 only */
 338         rate = (priv->band == IEEE80211_BAND_5GHZ) ?
 339                 IWL_RATE_6M_PLCP : IWL_RATE_1M_PLCP;
 340         /* Turn on both antennas for the station... */
 341         station->sta.rate_n_flags = cpu_to_le16(rate | RATE_MCS_ANT_AB_MSK);
 342
 343         return sta_id;
 344
 345 }
 346
 347 #define STA_WAIT_TIMEOUT (HZ/2)
 348
 349 /**
 350  * iwl_add_station_common -
 351  */
 352 int iwl_add_station_common(struct iwl_priv *priv, const u8 *addr,
 353                                   bool is_ap,
 354                                   struct ieee80211_sta_ht_cap *ht_info,
 355                                   u8 *sta_id_r)
 356 {
 357         struct iwl_station_entry *station;
 358         unsigned long flags_spin;
 359         int ret = 0;
 360         u8 sta_id;
 361
 362         *sta_id_r = 0;
 363         spin_lock_irqsave(&priv->sta_lock, flags_spin);
 364         sta_id = iwl_prep_station(priv, addr, is_ap, ht_info);
 365         if (sta_id == IWL_INVALID_STATION) {
 366                 IWL_ERR(priv, "Unable to prepare station %pM for addition\n",
 367                         addr);
 368                 spin_unlock_irqrestore(&priv->sta_lock, flags_spin);
 369                 return -EINVAL;
 370         }
 371
 372         /*
 373          * uCode is not able to deal with multiple requests to add a
 374          * station. Keep track if one is in progress so that we do not send
 375          * another.
 376          */
 377         if (priv->stations[sta_id].used & IWL_STA_UCODE_INPROGRESS) {
 378                 IWL_DEBUG_INFO(priv, "STA %d already in process of being added.\n",
 379                                sta_id);
 380                 spin_unlock_irqrestore(&priv->sta_lock, flags_spin);
 381                 return -EEXIST;
 382         }
 383
 384         if ((priv->stations[sta_id].used & IWL_STA_DRIVER_ACTIVE) &&
 385             (priv->stations[sta_id].used & IWL_STA_UCODE_ACTIVE)) {
 386                 IWL_DEBUG_ASSOC(priv, "STA %d (%pM) already added, not adding again.\n",
 387                                 sta_id, addr);
 388                 spin_unlock_irqrestore(&priv->sta_lock, flags_spin);
 389                 return -EEXIST;
 390         }
 391
 392         priv->stations[sta_id].used |= IWL_STA_UCODE_INPROGRESS;
 393         station = &priv->stations[sta_id];
 394         spin_unlock_irqrestore(&priv->sta_lock, flags_spin);
 395
 396         /* Add station to device's station table */
 397         ret = iwl_send_add_sta(priv, &station->sta, CMD_SYNC);
 398         if (ret) {
 399                 IWL_ERR(priv, "Adding station %pM failed.\n", station->sta.sta.addr);
 400                 spin_lock_irqsave(&priv->sta_lock, flags_spin);
 401                 priv->stations[sta_id].used &= ~IWL_STA_DRIVER_ACTIVE;
 402                 priv->stations[sta_id].used &= ~IWL_STA_UCODE_INPROGRESS;
 403                 spin_unlock_irqrestore(&priv->sta_lock, flags_spin);
 404         }
 405         *sta_id_r = sta_id;
 406         return ret;
 407 }
 408 EXPORT_SYMBOL(iwl_add_station_common);
 409
 410 static struct iwl_link_quality_cmd *iwl_sta_init_lq(struct iwl_priv *priv,
 411                                                     const u8 *addr, bool is_ap)
 412 {
 413         int i, r;
 414         struct iwl_link_quality_cmd *link_cmd;
 415         u32 rate_flags;
 416         int ret = 0;
 417
 418         link_cmd = kzalloc(sizeof(struct iwl_link_quality_cmd), GFP_KERNEL);
 419         if (!link_cmd) {
 420                 IWL_ERR(priv, "Unable to allocate memory for LQ cmd.\n");
 421                 return NULL;
 422         }
 423         /* Set up the rate scaling to start at selected rate, fall back
 424          * all the way down to 1M in IEEE order, and then spin on 1M */
 425         if (is_ap)
 426                 r = IWL_RATE_54M_INDEX;
 427         else if (priv->band == IEEE80211_BAND_5GHZ)
 428                 r = IWL_RATE_6M_INDEX;
 429         else
 430                 r = IWL_RATE_1M_INDEX;
 431
 432         for (i = 0; i < LINK_QUAL_MAX_RETRY_NUM; i++) {
 433                 rate_flags = 0;
 434                 if (r >= IWL_FIRST_CCK_RATE && r <= IWL_LAST_CCK_RATE)
 435                         rate_flags |= RATE_MCS_CCK_MSK;
 436
 437                 rate_flags |= first_antenna(priv->hw_params.valid_tx_ant) <<
 438                                 RATE_MCS_ANT_POS;
 439
 440                 link_cmd->rs_table[i].rate_n_flags =
 441                         iwl_hw_set_rate_n_flags(iwl_rates[r].plcp, rate_flags);
 442                 r = iwl_get_prev_ieee_rate(r);
 443         }
 444
 445         link_cmd->general_params.single_stream_ant_msk =
 446                                 first_antenna(priv->hw_params.valid_tx_ant);
 447
 448         link_cmd->general_params.dual_stream_ant_msk =
 449                 priv->hw_params.valid_tx_ant &
 450                 ~first_antenna(priv->hw_params.valid_tx_ant);
 451         if (!link_cmd->general_params.dual_stream_ant_msk) {
 452                 link_cmd->general_params.dual_stream_ant_msk = ANT_AB;
 453         } else if (num_of_ant(priv->hw_params.valid_tx_ant) == 2) {
 454                 link_cmd->general_params.dual_stream_ant_msk =
 455                         priv->hw_params.valid_tx_ant;
 456         }
 457
 458         link_cmd->agg_params.agg_dis_start_th = LINK_QUAL_AGG_DISABLE_START_DEF;
 459         link_cmd->agg_params.agg_time_limit =
 460                 cpu_to_le16(LINK_QUAL_AGG_TIME_LIMIT_DEF);
 461
 462         /* Update the rate scaling for control frame Tx to AP */
 463         link_cmd->sta_id = is_ap ? IWL_AP_ID : priv->hw_params.bcast_sta_id;
 464
 465         ret = iwl_send_lq_cmd(priv, link_cmd, CMD_SYNC, true);
 466         if (ret)
 467                 IWL_ERR(priv, "Link quality command failed (%d)\n", ret);
 468
 469         return link_cmd;
 470 }
 471
 472 /*
 473  * iwl_add_local_stations - Add stations not requested by mac80211
 474  *
 475  * This will be either the broadcast station or the bssid station needed by
 476  * ad-hoc.
 477  *
 478  * Function sleeps.
 479  */
 480 int iwl_add_local_station(struct iwl_priv *priv, const u8 *addr, bool init_rs)
 481 {
 482         int ret;
 483         u8 sta_id;
 484         struct iwl_link_quality_cmd *link_cmd;
 485         unsigned long flags;
 486
 487         ret = iwl_add_station_common(priv, addr, 0, NULL, &sta_id);
 488         if (ret) {
 489                 IWL_ERR(priv, "Unable to add station %pM\n", addr);
 490                 return ret;
 491         }
 492
 493         spin_lock_irqsave(&priv->sta_lock, flags);
 494         priv->stations[sta_id].used |= IWL_STA_LOCAL;
 495         spin_unlock_irqrestore(&priv->sta_lock, flags);
 496
 497         if (init_rs) {
 498                 /* Set up default rate scaling table in device's station table */
 499                 link_cmd = iwl_sta_init_lq(priv, addr, false);
 500                 if (!link_cmd) {
 501                         IWL_ERR(priv, "Unable to initialize rate scaling for station %pM.\n",
 502                                 addr);
 503                         return -ENOMEM;
 504                 }
 505                 spin_lock_irqsave(&priv->sta_lock, flags);
 506                 priv->stations[sta_id].lq = link_cmd;
 507                 spin_unlock_irqrestore(&priv->sta_lock, flags);
 508         }
 509
 510         return 0;
 511 }
 512 EXPORT_SYMBOL(iwl_add_local_station);
 513
 514 /**
 515  * iwl_sta_ucode_deactivate - deactivate ucode status for a station
 516  *
 517  * priv->sta_lock must be held
 518  */
 519 static void iwl_sta_ucode_deactivate(struct iwl_priv *priv, u8 sta_id)
 520 {
 521         /* Ucode must be active and driver must be non active */
 522         if ((priv->stations[sta_id].used &
 523              (IWL_STA_UCODE_ACTIVE | IWL_STA_DRIVER_ACTIVE)) != IWL_STA_UCODE_ACTIVE)
 524                 IWL_ERR(priv, "removed non active STA %u\n", sta_id);
 525
 526         priv->stations[sta_id].used &= ~IWL_STA_UCODE_ACTIVE;
 527
 528         memset(&priv->stations[sta_id], 0, sizeof(struct iwl_station_entry));
 529         IWL_DEBUG_ASSOC(priv, "Removed STA %u\n", sta_id);
 530 }
 531
 532 static int iwl_send_remove_station(struct iwl_priv *priv,
 533                                    struct iwl_station_entry *station)
 534 {
 535         struct iwl_rx_packet *pkt;
 536         int ret;
 537
 538         unsigned long flags_spin;
 539         struct iwl_rem_sta_cmd rm_sta_cmd;
 540
 541         struct iwl_host_cmd cmd = {
 542                 .id = REPLY_REMOVE_STA,
 543                 .len = sizeof(struct iwl_rem_sta_cmd),
 544                 .flags = CMD_SYNC,
 545                 .data = &rm_sta_cmd,
 546         };
 547
 548         memset(&rm_sta_cmd, 0, sizeof(rm_sta_cmd));
 549         rm_sta_cmd.num_sta = 1;
 550         memcpy(&rm_sta_cmd.addr, &station->sta.sta.addr , ETH_ALEN);
 551
 552         cmd.flags |= CMD_WANT_SKB;
 553
 554         ret = iwl_send_cmd(priv, &cmd);
 555
 556         if (ret)
 557                 return ret;
 558
 559         pkt = (struct iwl_rx_packet *)cmd.reply_page;
 560         if (pkt->hdr.flags & IWL_CMD_FAILED_MSK) {
 561                 IWL_ERR(priv, "Bad return from REPLY_REMOVE_STA (0x%08X)\n",
 562                           pkt->hdr.flags);
 563                 ret = -EIO;
 564         }
 565
 566         if (!ret) {
 567                 switch (pkt->u.rem_sta.status) {
 568                 case REM_STA_SUCCESS_MSK:
 569                         spin_lock_irqsave(&priv->sta_lock, flags_spin);
 570                         iwl_sta_ucode_deactivate(priv, station->sta.sta.sta_id);
 571                         spin_unlock_irqrestore(&priv->sta_lock, flags_spin);
 572                         IWL_DEBUG_ASSOC(priv, "REPLY_REMOVE_STA PASSED\n");
 573                         break;
 574                 default:
 575                         ret = -EIO;
 576                         IWL_ERR(priv, "REPLY_REMOVE_STA failed\n");
 577                         break;
 578                 }
 579         }
 580         iwl_free_pages(priv, cmd.reply_page);
 581
 582         return ret;
 583 }
 584
 585 /**
 586  * iwl_remove_station - Remove driver's knowledge of station.
 587  */
 588 int iwl_remove_station(struct iwl_priv *priv, const u8 *addr)
 589 {
 590         int sta_id = IWL_INVALID_STATION;
 591         int i, ret = -EINVAL;
 592         unsigned long flags;
 593         bool is_ap = priv->iw_mode == NL80211_IFTYPE_STATION;
 594         struct iwl_station_entry *station;
 595
 596         if (!iwl_is_ready(priv)) {
 597                 IWL_DEBUG_INFO(priv,
 598                         "Unable to remove station %pM, device not ready.\n",
 599                         addr);
 600                 /*
 601                  * It is typical for stations to be removed when we are
 602                  * going down. Return success since device will be down
 603                  * soon anyway
 604                  */
 605                 return 0;
 606         }
 607
 608         spin_lock_irqsave(&priv->sta_lock, flags);
 609
 610         if (is_ap)
 611                 sta_id = IWL_AP_ID;
 612         else
 613                 for (i = IWL_STA_ID; i < priv->hw_params.max_stations; i++)
 614                         if (priv->stations[i].used &&
 615                             !compare_ether_addr(priv->stations[i].sta.sta.addr,
 616                                                 addr)) {
 617                                 sta_id = i;
 618                                 break;
 619                         }
 620
 621         if (unlikely(sta_id == IWL_INVALID_STATION))
 622                 goto out;
 623
 624         IWL_DEBUG_ASSOC(priv, "Removing STA from driver:%d  %pM\n",
 625                 sta_id, addr);
 626
 627         if (!(priv->stations[sta_id].used & IWL_STA_DRIVER_ACTIVE)) {
 628                 IWL_DEBUG_INFO(priv, "Removing %pM but non DRIVER active\n",
 629                                 addr);
 630                 goto out;
 631         }
 632
 633         if (!(priv->stations[sta_id].used & IWL_STA_UCODE_ACTIVE)) {
 634                 IWL_DEBUG_INFO(priv, "Removing %pM but non UCODE active\n",
 635                                 addr);
 636                 goto out;
 637         }
 638
 639         if (priv->stations[sta_id].used & IWL_STA_LOCAL) {
 640                 kfree(priv->stations[sta_id].lq);
 641                 priv->stations[sta_id].lq = NULL;
 642         }
 643
 644         priv->stations[sta_id].used &= ~IWL_STA_DRIVER_ACTIVE;
 645
 646         priv->num_stations--;
 647
 648         BUG_ON(priv->num_stations < 0);
 649
 650         station = &priv->stations[sta_id];
 651         spin_unlock_irqrestore(&priv->sta_lock, flags);
 652
 653         ret = iwl_send_remove_station(priv, station);
 654         return ret;
 655 out:
 656         spin_unlock_irqrestore(&priv->sta_lock, flags);
 657         return ret;
 658 }
 659 EXPORT_SYMBOL_GPL(iwl_remove_station);
 660
 661 /**
 662  * iwl_clear_ucode_stations() - clear entire station table driver and/or ucode
 663  * @priv:
 664  * @force: If set then the uCode station table needs to be cleared here. If
 665  *         not set then the uCode station table has already been cleared,
 666  *         for example after sending it a RXON command without ASSOC bit
 667  *         set, and we just need to change driver state here.
 668  */
 669 void iwl_clear_ucode_stations(struct iwl_priv *priv, bool force)
 670 {
 671         int i;
 672         unsigned long flags_spin;
 673         bool cleared = false;
 674
 675         IWL_DEBUG_INFO(priv, "Clearing ucode stations in driver%s\n",
 676                         force ? " and ucode" : "");
 677
 678         if (force) {
 679                 if (!iwl_is_ready(priv)) {
 680                         /*
 681                          * If device is not ready at this point the station
 682                          * table is likely already empty (uCode not ready
 683                          * to receive station requests) or will soon be
 684                          * due to interface going down.
 685                          */
 686                         IWL_DEBUG_INFO(priv, "Unable to remove stations from device - device not ready\n");
 687                 } else {
 688                         iwl_send_cmd_pdu_async(priv, REPLY_REMOVE_ALL_STA, 0, NULL, NULL);
 689                 }
 690         }
 691
 692         spin_lock_irqsave(&priv->sta_lock, flags_spin);
 693         if (force) {
 694                 IWL_DEBUG_INFO(priv, "Clearing all station information in driver\n");
 695                 /*
 696                  * The station entry contains a link to the LQ command. For
 697                  * all stations managed by mac80211 this memory will be
 698                  * managed by it also. For local stations (broadcast and
 699                  * bssid station when in adhoc mode) we need to maintain
 700                  * this lq command separately. This memory is created when
 701                  * these stations are added.
 702                  */
 703                 for (i = 0; i < priv->hw_params.max_stations; i++) {
 704                         if (priv->stations[i].used & IWL_STA_LOCAL) {
 705                                 kfree(priv->stations[i].lq);
 706                                 priv->stations[i].lq = NULL;
 707                         }
 708                 }
 709                 priv->num_stations = 0;
 710                 memset(priv->stations, 0, sizeof(priv->stations));
 711                 cleared = true;
 712         } else {
 713                 for (i = 0; i < priv->hw_params.max_stations; i++) {
 714                         if (priv->stations[i].used & IWL_STA_UCODE_ACTIVE) {
 715                                 IWL_DEBUG_INFO(priv, "Clearing ucode active for station %d\n", i);
 716                                 priv->stations[i].used &= ~IWL_STA_UCODE_ACTIVE;
 717                                 cleared = true;
 718                         }
 719                 }
 720         }
 721         spin_unlock_irqrestore(&priv->sta_lock, flags_spin);
 722
 723         if (!cleared)
 724                 IWL_DEBUG_INFO(priv, "No active stations found to be cleared\n");
 725 }
 726 EXPORT_SYMBOL(iwl_clear_ucode_stations);
 727
 728 /**
 729  * iwl_restore_stations() - Restore driver known stations to device
 730  *
 731  * All stations considered active by driver, but not present in ucode, is
 732  * restored.
 733  *
 734  * Function sleeps.
 735  */
 736 void iwl_restore_stations(struct iwl_priv *priv)
 737 {
 738         struct iwl_station_entry *station;
 739         unsigned long flags_spin;
 740         int i;
 741         bool found = false;
 742         int ret;
 743
 744         if (!iwl_is_ready(priv)) {
 745                 IWL_DEBUG_INFO(priv, "Not ready yet, not restoring any stations.\n");
 746                 return;
 747         }
 748
 749         IWL_DEBUG_ASSOC(priv, "Restoring all known stations ... start.\n");
 750         spin_lock_irqsave(&priv->sta_lock, flags_spin);
 751         for (i = 0; i < priv->hw_params.max_stations; i++) {
 752                 if ((priv->stations[i].used & IWL_STA_DRIVER_ACTIVE) &&
 753                             !(priv->stations[i].used & IWL_STA_UCODE_ACTIVE)) {
 754                         IWL_DEBUG_ASSOC(priv, "Restoring sta %pM\n",
 755                                         priv->stations[i].sta.sta.addr);
 756                         priv->stations[i].sta.mode = 0;
 757                         priv->stations[i].used |= IWL_STA_UCODE_INPROGRESS;
 758                         found = true;
 759                 }
 760         }
 761
 762         for (i = 0; i < priv->hw_params.max_stations; i++) {
 763                 if ((priv->stations[i].used & IWL_STA_UCODE_INPROGRESS)) {
 764                         spin_unlock_irqrestore(&priv->sta_lock, flags_spin);
 765                         station = &priv->stations[i];
 766                         ret = iwl_send_add_sta(priv, &priv->stations[i].sta, CMD_SYNC);
 767                         if (ret) {
 768                                 IWL_ERR(priv, "Adding station %pM failed.\n",
 769                                         station->sta.sta.addr);
 770                                 spin_lock_irqsave(&priv->sta_lock, flags_spin);
 771                                 priv->stations[i].used &= ~IWL_STA_DRIVER_ACTIVE;
 772                                 priv->stations[i].used &= ~IWL_STA_UCODE_INPROGRESS;
 773                                 spin_unlock_irqrestore(&priv->sta_lock, flags_spin);
 774                         }
 775                         /*
 776                          * Rate scaling has already been initialized, send
 777                          * current LQ command
 778                          */
 779                         if (station->lq)
 780                                 iwl_send_lq_cmd(priv, station->lq, CMD_SYNC, true);
 781                         spin_lock_irqsave(&priv->sta_lock, flags_spin);
 782                         priv->stations[i].used &= ~IWL_STA_UCODE_INPROGRESS;
 783                 }
 784         }
 785
 786         spin_unlock_irqrestore(&priv->sta_lock, flags_spin);
 787         if (!found)
 788                 IWL_DEBUG_INFO(priv, "Restoring all known stations .... no stations to be restored.\n");
 789         else
 790                 IWL_DEBUG_INFO(priv, "Restoring all known stations .... complete.\n");
 791 }
 792 EXPORT_SYMBOL(iwl_restore_stations);
 793
 794 int iwl_get_free_ucode_key_index(struct iwl_priv *priv)
 795 {
 796         int i;
 797
 798         for (i = 0; i < STA_KEY_MAX_NUM; i++)
 799                 if (!test_and_set_bit(i, &priv->ucode_key_table))
 800                         return i;
 801
 802         return WEP_INVALID_OFFSET;
 803 }
 804 EXPORT_SYMBOL(iwl_get_free_ucode_key_index);
 805
 806 static int iwl_send_static_wepkey_cmd(struct iwl_priv *priv, u8 send_if_empty)
 807 {
 808         int i, not_empty = 0;
 809         u8 buff[sizeof(struct iwl_wep_cmd) +
 810                 sizeof(struct iwl_wep_key) * WEP_KEYS_MAX];
 811         struct iwl_wep_cmd *wep_cmd = (struct iwl_wep_cmd *)buff;
 812         size_t cmd_size  = sizeof(struct iwl_wep_cmd);
 813         struct iwl_host_cmd cmd = {
 814                 .id = REPLY_WEPKEY,
 815                 .data = wep_cmd,
 816                 .flags = CMD_SYNC,
 817         };
 818
 819         might_sleep();
 820
 821         memset(wep_cmd, 0, cmd_size +
 822                         (sizeof(struct iwl_wep_key) * WEP_KEYS_MAX));
 823
 824         for (i = 0; i < WEP_KEYS_MAX ; i++) {
 825                 wep_cmd->key[i].key_index = i;
 826                 if (priv->wep_keys[i].key_size) {
 827                         wep_cmd->key[i].key_offset = i;
 828                         not_empty = 1;
 829                 } else {
 830                         wep_cmd->key[i].key_offset = WEP_INVALID_OFFSET;
 831                 }
 832
 833                 wep_cmd->key[i].key_size = priv->wep_keys[i].key_size;
 834                 memcpy(&wep_cmd->key[i].key[3], priv->wep_keys[i].key,
 835                                 priv->wep_keys[i].key_size);
 836         }
 837
 838         wep_cmd->global_key_type = WEP_KEY_WEP_TYPE;
 839         wep_cmd->num_keys = WEP_KEYS_MAX;
 840
 841         cmd_size += sizeof(struct iwl_wep_key) * WEP_KEYS_MAX;
 842
 843         cmd.len = cmd_size;
 844
 845         if (not_empty || send_if_empty)
 846                 return iwl_send_cmd(priv, &cmd);
 847         else
 848                 return 0;
 849 }
 850
 851 int iwl_restore_default_wep_keys(struct iwl_priv *priv)
 852 {
 853         WARN_ON(!mutex_is_locked(&priv->mutex));
 854
 855         return iwl_send_static_wepkey_cmd(priv, 0);
 856 }
 857 EXPORT_SYMBOL(iwl_restore_default_wep_keys);
 858
 859 int iwl_remove_default_wep_key(struct iwl_priv *priv,
 860                                struct ieee80211_key_conf *keyconf)
 861 {
 862         int ret;
 863
 864         WARN_ON(!mutex_is_locked(&priv->mutex));
 865
 866         IWL_DEBUG_WEP(priv, "Removing default WEP key: idx=%d\n",
 867                       keyconf->keyidx);
 868
 869         memset(&priv->wep_keys[keyconf->keyidx], 0, sizeof(priv->wep_keys[0]));
 870         if (iwl_is_rfkill(priv)) {
 871                 IWL_DEBUG_WEP(priv, "Not sending REPLY_WEPKEY command due to RFKILL.\n");
 872                 /* but keys in device are clear anyway so return success */
 873                 return 0;
 874         }
 875         ret = iwl_send_static_wepkey_cmd(priv, 1);
 876         IWL_DEBUG_WEP(priv, "Remove default WEP key: idx=%d ret=%d\n",
 877                       keyconf->keyidx, ret);
 878
 879         return ret;
 880 }
 881 EXPORT_SYMBOL(iwl_remove_default_wep_key);
 882
 883 int iwl_set_default_wep_key(struct iwl_priv *priv,
 884                             struct ieee80211_key_conf *keyconf)
 885 {
 886         int ret;
 887
 888         WARN_ON(!mutex_is_locked(&priv->mutex));
 889
 890         if (keyconf->keylen != WEP_KEY_LEN_128 &&
 891             keyconf->keylen != WEP_KEY_LEN_64) {
 892                 IWL_DEBUG_WEP(priv, "Bad WEP key length %d\n", keyconf->keylen);
 893                 return -EINVAL;
 894         }
 895
 896         keyconf->flags &= ~IEEE80211_KEY_FLAG_GENERATE_IV;
 897         keyconf->hw_key_idx = HW_KEY_DEFAULT;
 898         priv->stations[IWL_AP_ID].keyinfo.alg = ALG_WEP;
 899
 900         priv->wep_keys[keyconf->keyidx].key_size = keyconf->keylen;
 901         memcpy(&priv->wep_keys[keyconf->keyidx].key, &keyconf->key,
 902                                                         keyconf->keylen);
 903
 904         ret = iwl_send_static_wepkey_cmd(priv, 0);
 905         IWL_DEBUG_WEP(priv, "Set default WEP key: len=%d idx=%d ret=%d\n",
 906                 keyconf->keylen, keyconf->keyidx, ret);
 907
 908         return ret;
 909 }
 910 EXPORT_SYMBOL(iwl_set_default_wep_key);
 911
 912 static int iwl_set_wep_dynamic_key_info(struct iwl_priv *priv,
 913                                 struct ieee80211_key_conf *keyconf,
 914                                 u8 sta_id)
 915 {
 916         unsigned long flags;
 917         __le16 key_flags = 0;
 918         int ret;
 919
 920         keyconf->flags &= ~IEEE80211_KEY_FLAG_GENERATE_IV;
 921
 922         key_flags |= (STA_KEY_FLG_WEP | STA_KEY_FLG_MAP_KEY_MSK);
 923         key_flags |= cpu_to_le16(keyconf->keyidx << STA_KEY_FLG_KEYID_POS);
 924         key_flags &= ~STA_KEY_FLG_INVALID;
 925
 926         if (keyconf->keylen == WEP_KEY_LEN_128)
 927                 key_flags |= STA_KEY_FLG_KEY_SIZE_MSK;
 928
 929         if (sta_id == priv->hw_params.bcast_sta_id)
 930                 key_flags |= STA_KEY_MULTICAST_MSK;
 931
 932         spin_lock_irqsave(&priv->sta_lock, flags);
 933
 934         priv->stations[sta_id].keyinfo.alg = keyconf->alg;
 935         priv->stations[sta_id].keyinfo.keylen = keyconf->keylen;
 936         priv->stations[sta_id].keyinfo.keyidx = keyconf->keyidx;
 937
 938         memcpy(priv->stations[sta_id].keyinfo.key,
 939                                 keyconf->key, keyconf->keylen);
 940
 941         memcpy(&priv->stations[sta_id].sta.key.key[3],
 942                                 keyconf->key, keyconf->keylen);
 943
 944         if ((priv->stations[sta_id].sta.key.key_flags & STA_KEY_FLG_ENCRYPT_MSK)
 945                         == STA_KEY_FLG_NO_ENC)
 946                 priv->stations[sta_id].sta.key.key_offset =
 947                                  iwl_get_free_ucode_key_index(priv);
 948         /* else, we are overriding an existing key => no need to allocated room
 949          * in uCode. */
 950
 951         WARN(priv->stations[sta_id].sta.key.key_offset == WEP_INVALID_OFFSET,
 952                 "no space for a new key");
 953
 954         priv->stations[sta_id].sta.key.key_flags = key_flags;
 955         priv->stations[sta_id].sta.sta.modify_mask = STA_MODIFY_KEY_MASK;
 956         priv->stations[sta_id].sta.mode = STA_CONTROL_MODIFY_MSK;
 957
 958         ret = iwl_send_add_sta(priv, &priv->stations[sta_id].sta, CMD_ASYNC);
 959
 960         spin_unlock_irqrestore(&priv->sta_lock, flags);
 961
 962         return ret;
 963 }
 964
 965 static int iwl_set_ccmp_dynamic_key_info(struct iwl_priv *priv,
 966                                    struct ieee80211_key_conf *keyconf,
 967                                    u8 sta_id)
 968 {
 969         unsigned long flags;
 970         __le16 key_flags = 0;
 971         int ret;
 972
 973         key_flags |= (STA_KEY_FLG_CCMP | STA_KEY_FLG_MAP_KEY_MSK);
 974         key_flags |= cpu_to_le16(keyconf->keyidx << STA_KEY_FLG_KEYID_POS);
 975         key_flags &= ~STA_KEY_FLG_INVALID;
 976
 977         if (sta_id == priv->hw_params.bcast_sta_id)
 978                 key_flags |= STA_KEY_MULTICAST_MSK;
 979
 980         keyconf->flags |= IEEE80211_KEY_FLAG_GENERATE_IV;
 981
 982         spin_lock_irqsave(&priv->sta_lock, flags);
 983         priv->stations[sta_id].keyinfo.alg = keyconf->alg;
 984         priv->stations[sta_id].keyinfo.keylen = keyconf->keylen;
 985
 986         memcpy(priv->stations[sta_id].keyinfo.key, keyconf->key,
 987                keyconf->keylen);
 988
 989         memcpy(priv->stations[sta_id].sta.key.key, keyconf->key,
 990                keyconf->keylen);
 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         priv->stations[sta_id].sta.sta.modify_mask = STA_MODIFY_KEY_MASK;
1004         priv->stations[sta_id].sta.mode = STA_CONTROL_MODIFY_MSK;
1005
1006         ret = iwl_send_add_sta(priv, &priv->stations[sta_id].sta, CMD_ASYNC);
1007
1008         spin_unlock_irqrestore(&priv->sta_lock, flags);
1009
1010         return ret;
1011 }
1012
1013 static int iwl_set_tkip_dynamic_key_info(struct iwl_priv *priv,
1014                                    struct ieee80211_key_conf *keyconf,
1015                                    u8 sta_id)
1016 {
1017         unsigned long flags;
1018         int ret = 0;
1019         __le16 key_flags = 0;
1020
1021         key_flags |= (STA_KEY_FLG_TKIP | STA_KEY_FLG_MAP_KEY_MSK);
1022         key_flags |= cpu_to_le16(keyconf->keyidx << STA_KEY_FLG_KEYID_POS);
1023         key_flags &= ~STA_KEY_FLG_INVALID;
1024
1025         if (sta_id == priv->hw_params.bcast_sta_id)
1026                 key_flags |= STA_KEY_MULTICAST_MSK;
1027
1028         keyconf->flags |= IEEE80211_KEY_FLAG_GENERATE_IV;
1029         keyconf->flags |= IEEE80211_KEY_FLAG_GENERATE_MMIC;
1030
1031         spin_lock_irqsave(&priv->sta_lock, flags);
1032
1033         priv->stations[sta_id].keyinfo.alg = keyconf->alg;
1034         priv->stations[sta_id].keyinfo.keylen = 16;
1035
1036         if ((priv->stations[sta_id].sta.key.key_flags & STA_KEY_FLG_ENCRYPT_MSK)
1037                         == STA_KEY_FLG_NO_ENC)
1038                 priv->stations[sta_id].sta.key.key_offset =
1039                                  iwl_get_free_ucode_key_index(priv);
1040         /* else, we are overriding an existing key => no need to allocated room
1041          * in uCode. */
1042
1043         WARN(priv->stations[sta_id].sta.key.key_offset == WEP_INVALID_OFFSET,
1044                 "no space for a new key");
1045
1046         priv->stations[sta_id].sta.key.key_flags = key_flags;
1047
1048
1049         /* This copy is acutally not needed: we get the key with each TX */
1050         memcpy(priv->stations[sta_id].keyinfo.key, keyconf->key, 16);
1051
1052         memcpy(priv->stations[sta_id].sta.key.key, keyconf->key, 16);
1053
1054         spin_unlock_irqrestore(&priv->sta_lock, flags);
1055
1056         return ret;
1057 }
1058
1059 void iwl_update_tkip_key(struct iwl_priv *priv,
1060                         struct ieee80211_key_conf *keyconf,
1061                         const u8 *addr, u32 iv32, u16 *phase1key)
1062 {
1063         u8 sta_id = IWL_INVALID_STATION;
1064         unsigned long flags;
1065         int i;
1066
1067         sta_id = iwl_find_station(priv, addr);
1068         if (sta_id == IWL_INVALID_STATION) {
1069                 IWL_DEBUG_MAC80211(priv, "leave - %pM not in station map.\n",
1070                                    addr);
1071                 return;
1072         }
1073
1074         if (iwl_scan_cancel(priv)) {
1075                 /* cancel scan failed, just live w/ bad key and rely
1076                    briefly on SW decryption */
1077                 return;
1078         }
1079
1080         spin_lock_irqsave(&priv->sta_lock, flags);
1081
1082         priv->stations[sta_id].sta.key.tkip_rx_tsc_byte2 = (u8) iv32;
1083
1084         for (i = 0; i < 5; i++)
1085                 priv->stations[sta_id].sta.key.tkip_rx_ttak[i] =
1086                         cpu_to_le16(phase1key[i]);
1087
1088         priv->stations[sta_id].sta.sta.modify_mask = STA_MODIFY_KEY_MASK;
1089         priv->stations[sta_id].sta.mode = STA_CONTROL_MODIFY_MSK;
1090
1091         iwl_send_add_sta(priv, &priv->stations[sta_id].sta, CMD_ASYNC);
1092
1093         spin_unlock_irqrestore(&priv->sta_lock, flags);
1094
1095 }
1096 EXPORT_SYMBOL(iwl_update_tkip_key);
1097
1098 int iwl_remove_dynamic_key(struct iwl_priv *priv,
1099                                 struct ieee80211_key_conf *keyconf,
1100                                 u8 sta_id)
1101 {
1102         unsigned long flags;
1103         int ret = 0;
1104         u16 key_flags;
1105         u8 keyidx;
1106
1107         priv->key_mapping_key--;
1108
1109         spin_lock_irqsave(&priv->sta_lock, flags);
1110         key_flags = le16_to_cpu(priv->stations[sta_id].sta.key.key_flags);
1111         keyidx = (key_flags >> STA_KEY_FLG_KEYID_POS) & 0x3;
1112
1113         IWL_DEBUG_WEP(priv, "Remove dynamic key: idx=%d sta=%d\n",
1114                       keyconf->keyidx, sta_id);
1115
1116         if (keyconf->keyidx != keyidx) {
1117                 /* We need to remove a key with index different that the one
1118                  * in the uCode. This means that the key we need to remove has
1119                  * been replaced by another one with different index.
1120                  * Don't do anything and return ok
1121                  */
1122                 spin_unlock_irqrestore(&priv->sta_lock, flags);
1123                 return 0;
1124         }
1125
1126         if (priv->stations[sta_id].sta.key.key_offset == WEP_INVALID_OFFSET) {
1127                 IWL_WARN(priv, "Removing wrong key %d 0x%x\n",
1128                             keyconf->keyidx, key_flags);
1129                 spin_unlock_irqrestore(&priv->sta_lock, flags);
1130                 return 0;
1131         }
1132
1133         if (!test_and_clear_bit(priv->stations[sta_id].sta.key.key_offset,
1134                 &priv->ucode_key_table))
1135                 IWL_ERR(priv, "index %d not used in uCode key table.\n",
1136                         priv->stations[sta_id].sta.key.key_offset);
1137         memset(&priv->stations[sta_id].keyinfo, 0,
1138                                         sizeof(struct iwl_hw_key));
1139         memset(&priv->stations[sta_id].sta.key, 0,
1140                                         sizeof(struct iwl4965_keyinfo));
1141         priv->stations[sta_id].sta.key.key_flags =
1142                         STA_KEY_FLG_NO_ENC | STA_KEY_FLG_INVALID;
1143         priv->stations[sta_id].sta.key.key_offset = WEP_INVALID_OFFSET;
1144         priv->stations[sta_id].sta.sta.modify_mask = STA_MODIFY_KEY_MASK;
1145         priv->stations[sta_id].sta.mode = STA_CONTROL_MODIFY_MSK;
1146
1147         if (iwl_is_rfkill(priv)) {
1148                 IWL_DEBUG_WEP(priv, "Not sending REPLY_ADD_STA command because RFKILL enabled.\n");
1149                 spin_unlock_irqrestore(&priv->sta_lock, flags);
1150                 return 0;
1151         }
1152         ret =  iwl_send_add_sta(priv, &priv->stations[sta_id].sta, CMD_ASYNC);
1153         spin_unlock_irqrestore(&priv->sta_lock, flags);
1154         return ret;
1155 }
1156 EXPORT_SYMBOL(iwl_remove_dynamic_key);
1157
1158 int iwl_set_dynamic_key(struct iwl_priv *priv,
1159                                 struct ieee80211_key_conf *keyconf, u8 sta_id)
1160 {
1161         int ret;
1162
1163         priv->key_mapping_key++;
1164         keyconf->hw_key_idx = HW_KEY_DYNAMIC;
1165
1166         switch (keyconf->alg) {
1167         case ALG_CCMP:
1168                 ret = iwl_set_ccmp_dynamic_key_info(priv, keyconf, sta_id);
1169                 break;
1170         case ALG_TKIP:
1171                 ret = iwl_set_tkip_dynamic_key_info(priv, keyconf, sta_id);
1172                 break;
1173         case ALG_WEP:
1174                 ret = iwl_set_wep_dynamic_key_info(priv, keyconf, sta_id);
1175                 break;
1176         default:
1177                 IWL_ERR(priv,
1178                         "Unknown alg: %s alg = %d\n", __func__, keyconf->alg);
1179                 ret = -EINVAL;
1180         }
1181
1182         IWL_DEBUG_WEP(priv, "Set dynamic key: alg= %d len=%d idx=%d sta=%d ret=%d\n",
1183                       keyconf->alg, keyconf->keylen, keyconf->keyidx,
1184                       sta_id, ret);
1185
1186         return ret;
1187 }
1188 EXPORT_SYMBOL(iwl_set_dynamic_key);
1189
1190 #ifdef CONFIG_IWLWIFI_DEBUG
1191 static void iwl_dump_lq_cmd(struct iwl_priv *priv,
1192                            struct iwl_link_quality_cmd *lq)
1193 {
1194         int i;
1195         IWL_DEBUG_RATE(priv, "lq station id 0x%x\n", lq->sta_id);
1196         IWL_DEBUG_RATE(priv, "lq ant 0x%X 0x%X\n",
1197                        lq->general_params.single_stream_ant_msk,
1198                        lq->general_params.dual_stream_ant_msk);
1199
1200         for (i = 0; i < LINK_QUAL_MAX_RETRY_NUM; i++)
1201                 IWL_DEBUG_RATE(priv, "lq index %d 0x%X\n",
1202                                i, lq->rs_table[i].rate_n_flags);
1203 }
1204 #else
1205 static inline void iwl_dump_lq_cmd(struct iwl_priv *priv,
1206                                    struct iwl_link_quality_cmd *lq)
1207 {
1208 }
1209 #endif
1210
1211 /**
1212  * iwl_send_lq_cmd() - Send link quality command
1213  * @init: This command is sent as part of station initialization right
1214  *        after station has been added.
1215  *
1216  * The link quality command is sent as the last step of station creation.
1217  * This is the special case in which init is set and we call a callback in
1218  * this case to clear the state indicating that station creation is in
1219  * progress.
1220  */
1221 int iwl_send_lq_cmd(struct iwl_priv *priv,
1222                     struct iwl_link_quality_cmd *lq, u8 flags, bool init)
1223 {
1224         int ret = 0;
1225         unsigned long flags_spin;
1226
1227         struct iwl_host_cmd cmd = {
1228                 .id = REPLY_TX_LINK_QUALITY_CMD,
1229                 .len = sizeof(struct iwl_link_quality_cmd),
1230                 .flags = flags,
1231                 .data = lq,
1232         };
1233
1234         if (WARN_ON(lq->sta_id == IWL_INVALID_STATION))
1235                 return -EINVAL;
1236
1237         iwl_dump_lq_cmd(priv, lq);
1238         BUG_ON(init && (cmd.flags & CMD_ASYNC));
1239
1240         ret = iwl_send_cmd(priv, &cmd);
1241
1242         if (cmd.flags & CMD_ASYNC)
1243                 return ret;
1244
1245         if (init) {
1246                 IWL_DEBUG_INFO(priv, "init LQ command complete, clearing sta addition status for sta %d\n",
1247                                lq->sta_id);
1248                 spin_lock_irqsave(&priv->sta_lock, flags_spin);
1249                 priv->stations[lq->sta_id].used &= ~IWL_STA_UCODE_INPROGRESS;
1250                 spin_unlock_irqrestore(&priv->sta_lock, flags_spin);
1251         }
1252         return ret;
1253 }
1254 EXPORT_SYMBOL(iwl_send_lq_cmd);
1255
1256 /**
1257  * iwl_add_bcast_station - add broadcast station into station table.
1258  */
1259 int iwl_add_bcast_station(struct iwl_priv *priv)
1260 {
1261         IWL_DEBUG_INFO(priv, "Adding broadcast station to station table\n");
1262         return iwl_add_local_station(priv, iwl_bcast_addr, true);
1263 }
1264 EXPORT_SYMBOL(iwl_add_bcast_station);
1265
1266 /**
1267  * iwl3945_add_bcast_station - add broadcast station into station table.
1268  */
1269 int iwl3945_add_bcast_station(struct iwl_priv *priv)
1270 {
1271         int ret;
1272
1273         IWL_DEBUG_INFO(priv, "Adding broadcast station to station table\n");
1274         ret = iwl_add_local_station(priv, iwl_bcast_addr, false);
1275         /*
1276          * It is assumed that when station is added more initialization
1277          * needs to be done, but for 3945 it is not the case and we can
1278          * just release station table access right here.
1279          */
1280         priv->stations[priv->hw_params.bcast_sta_id].used &= ~IWL_STA_UCODE_INPROGRESS;
1281         return ret;
1282
1283 }
1284 EXPORT_SYMBOL(iwl3945_add_bcast_station);
1285
1286 /**
1287  * iwl_get_sta_id - Find station's index within station table
1288  *
1289  * If new IBSS station, create new entry in station table
1290  */
1291 int iwl_get_sta_id(struct iwl_priv *priv, struct ieee80211_hdr *hdr)
1292 {
1293         int sta_id;
1294         __le16 fc = hdr->frame_control;
1295
1296         /* If this frame is broadcast or management, use broadcast station id */
1297         if (!ieee80211_is_data(fc) ||  is_multicast_ether_addr(hdr->addr1))
1298                 return priv->hw_params.bcast_sta_id;
1299
1300         switch (priv->iw_mode) {
1301
1302         /* If we are a client station in a BSS network, use the special
1303          * AP station entry (that's the only station we communicate with) */
1304         case NL80211_IFTYPE_STATION:
1305                 /*
1306                  * If addition of station not complete yet, which means
1307                  * that rate scaling has not been initialized, then return
1308                  * the broadcast station.
1309                  */
1310                 if (!(priv->stations[IWL_AP_ID].used & IWL_STA_UCODE_ACTIVE))
1311                         return priv->hw_params.bcast_sta_id;
1312                 return IWL_AP_ID;
1313
1314         /* If we are an AP, then find the station, or use BCAST */
1315         case NL80211_IFTYPE_AP:
1316                 sta_id = iwl_find_station(priv, hdr->addr1);
1317                 if (sta_id != IWL_INVALID_STATION)
1318                         return sta_id;
1319                 return priv->hw_params.bcast_sta_id;
1320
1321         /* If this frame is going out to an IBSS network, find the station,
1322          * or create a new station table entry */
1323         case NL80211_IFTYPE_ADHOC:
1324                 sta_id = iwl_find_station(priv, hdr->addr1);
1325                 if (sta_id != IWL_INVALID_STATION)
1326                         return sta_id;
1327
1328                 IWL_DEBUG_DROP(priv, "Station %pM not in station map. "
1329                                "Defaulting to broadcast...\n",
1330                                hdr->addr1);
1331                 iwl_print_hex_dump(priv, IWL_DL_DROP, (u8 *) hdr, sizeof(*hdr));
1332                 return priv->hw_params.bcast_sta_id;
1333
1334         default:
1335                 IWL_WARN(priv, "Unknown mode of operation: %d\n",
1336                         priv->iw_mode);
1337                 return priv->hw_params.bcast_sta_id;
1338         }
1339 }
1340 EXPORT_SYMBOL(iwl_get_sta_id);
1341
1342 /**
1343  * iwl_sta_tx_modify_enable_tid - Enable Tx for this TID in station table
1344  */
1345 void iwl_sta_tx_modify_enable_tid(struct iwl_priv *priv, int sta_id, int tid)
1346 {
1347         unsigned long flags;
1348
1349         /* Remove "disable" flag, to enable Tx for this TID */
1350         spin_lock_irqsave(&priv->sta_lock, flags);
1351         priv->stations[sta_id].sta.sta.modify_mask = STA_MODIFY_TID_DISABLE_TX;
1352         priv->stations[sta_id].sta.tid_disable_tx &= cpu_to_le16(~(1 << tid));
1353         priv->stations[sta_id].sta.mode = STA_CONTROL_MODIFY_MSK;
1354         spin_unlock_irqrestore(&priv->sta_lock, flags);
1355
1356         iwl_send_add_sta(priv, &priv->stations[sta_id].sta, CMD_ASYNC);
1357 }
1358 EXPORT_SYMBOL(iwl_sta_tx_modify_enable_tid);
1359
1360 int iwl_sta_rx_agg_start(struct iwl_priv *priv,
1361                          const u8 *addr, int tid, u16 ssn)
1362 {
1363         unsigned long flags;
1364         int sta_id;
1365
1366         sta_id = iwl_find_station(priv, addr);
1367         if (sta_id == IWL_INVALID_STATION)
1368                 return -ENXIO;
1369
1370         spin_lock_irqsave(&priv->sta_lock, flags);
1371         priv->stations[sta_id].sta.station_flags_msk = 0;
1372         priv->stations[sta_id].sta.sta.modify_mask = STA_MODIFY_ADDBA_TID_MSK;
1373         priv->stations[sta_id].sta.add_immediate_ba_tid = (u8)tid;
1374         priv->stations[sta_id].sta.add_immediate_ba_ssn = cpu_to_le16(ssn);
1375         priv->stations[sta_id].sta.mode = STA_CONTROL_MODIFY_MSK;
1376         spin_unlock_irqrestore(&priv->sta_lock, flags);
1377
1378         return iwl_send_add_sta(priv, &priv->stations[sta_id].sta,
1379                                         CMD_ASYNC);
1380 }
1381 EXPORT_SYMBOL(iwl_sta_rx_agg_start);
1382
1383 int iwl_sta_rx_agg_stop(struct iwl_priv *priv, const u8 *addr, int tid)
1384 {
1385         unsigned long flags;
1386         int sta_id;
1387
1388         sta_id = iwl_find_station(priv, addr);
1389         if (sta_id == IWL_INVALID_STATION) {
1390                 IWL_ERR(priv, "Invalid station for AGG tid %d\n", tid);
1391                 return -ENXIO;
1392         }
1393
1394         spin_lock_irqsave(&priv->sta_lock, flags);
1395         priv->stations[sta_id].sta.station_flags_msk = 0;
1396         priv->stations[sta_id].sta.sta.modify_mask = STA_MODIFY_DELBA_TID_MSK;
1397         priv->stations[sta_id].sta.remove_immediate_ba_tid = (u8)tid;
1398         priv->stations[sta_id].sta.mode = STA_CONTROL_MODIFY_MSK;
1399         spin_unlock_irqrestore(&priv->sta_lock, flags);
1400
1401         return iwl_send_add_sta(priv, &priv->stations[sta_id].sta,
1402                                         CMD_ASYNC);
1403 }
1404 EXPORT_SYMBOL(iwl_sta_rx_agg_stop);
1405
1406 void iwl_sta_modify_ps_wake(struct iwl_priv *priv, int sta_id)
1407 {
1408         unsigned long flags;
1409
1410         spin_lock_irqsave(&priv->sta_lock, flags);
1411         priv->stations[sta_id].sta.station_flags &= ~STA_FLG_PWR_SAVE_MSK;
1412         priv->stations[sta_id].sta.station_flags_msk = STA_FLG_PWR_SAVE_MSK;
1413         priv->stations[sta_id].sta.sta.modify_mask = 0;
1414         priv->stations[sta_id].sta.sleep_tx_count = 0;
1415         priv->stations[sta_id].sta.mode = STA_CONTROL_MODIFY_MSK;
1416         spin_unlock_irqrestore(&priv->sta_lock, flags);
1417
1418         iwl_send_add_sta(priv, &priv->stations[sta_id].sta, CMD_ASYNC);
1419 }
1420 EXPORT_SYMBOL(iwl_sta_modify_ps_wake);
1421
1422 void iwl_sta_modify_sleep_tx_count(struct iwl_priv *priv, int sta_id, int cnt)
1423 {
1424         unsigned long flags;
1425
1426         spin_lock_irqsave(&priv->sta_lock, flags);
1427         priv->stations[sta_id].sta.station_flags |= STA_FLG_PWR_SAVE_MSK;
1428         priv->stations[sta_id].sta.station_flags_msk = STA_FLG_PWR_SAVE_MSK;
1429         priv->stations[sta_id].sta.sta.modify_mask =
1430                                         STA_MODIFY_SLEEP_TX_COUNT_MSK;
1431         priv->stations[sta_id].sta.sleep_tx_count = cpu_to_le16(cnt);
1432         priv->stations[sta_id].sta.mode = STA_CONTROL_MODIFY_MSK;
1433         spin_unlock_irqrestore(&priv->sta_lock, flags);
1434
1435         iwl_send_add_sta(priv, &priv->stations[sta_id].sta, CMD_ASYNC);
1436 }
1437 EXPORT_SYMBOL(iwl_sta_modify_sleep_tx_count);
1438
1439 int iwl_mac_sta_remove(struct ieee80211_hw *hw,
1440                                struct ieee80211_vif *vif,
1441                                struct ieee80211_sta *sta)
1442 {
1443         int ret;
1444         struct iwl_priv *priv = hw->priv;
1445         IWL_DEBUG_INFO(priv, "received request to remove station %pM\n",
1446                         sta->addr);
1447         ret = iwl_remove_station(priv, sta->addr);
1448         if (ret)
1449                 IWL_ERR(priv, "Error removing station %pM\n",
1450                         sta->addr);
1451         return ret;
1452 }
1453 EXPORT_SYMBOL(iwl_mac_sta_remove);