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 /* priv->sta_lock must be held */
  39 static void iwl_sta_ucode_activate(struct iwl_priv *priv, u8 sta_id)
  40 {
  41
  42         if (!(priv->stations[sta_id].used & IWL_STA_DRIVER_ACTIVE))
  43                 IWL_ERR(priv, "ACTIVATE a non DRIVER active station id %u addr %pM\n",
  44                         sta_id, priv->stations[sta_id].sta.sta.addr);
  45
  46         if (priv->stations[sta_id].used & IWL_STA_UCODE_ACTIVE) {
  47                 IWL_DEBUG_ASSOC(priv,
  48                                 "STA id %u addr %pM already present in uCode (according to driver)\n",
  49                                 sta_id, priv->stations[sta_id].sta.sta.addr);
  50         } else {
  51                 priv->stations[sta_id].used |= IWL_STA_UCODE_ACTIVE;
  52                 IWL_DEBUG_ASSOC(priv, "Added STA id %u addr %pM to uCode\n",
  53                                 sta_id, priv->stations[sta_id].sta.sta.addr);
  54         }
  55 }
  56
  57 static void iwl_process_add_sta_resp(struct iwl_priv *priv,
  58                                      struct iwl_addsta_cmd *addsta,
  59                                      struct iwl_rx_packet *pkt,
  60                                      bool sync)
  61 {
  62         u8 sta_id = addsta->sta.sta_id;
  63         unsigned long flags;
  64
  65         if (pkt->hdr.flags & IWL_CMD_FAILED_MSK) {
  66                 IWL_ERR(priv, "Bad return from REPLY_ADD_STA (0x%08X)\n",
  67                         pkt->hdr.flags);
  68                 return;
  69         }
  70
  71         IWL_DEBUG_INFO(priv, "Processing response for adding station %u\n",
  72                        sta_id);
  73
  74         spin_lock_irqsave(&priv->sta_lock, flags);
  75
  76         switch (pkt->u.add_sta.status) {
  77         case ADD_STA_SUCCESS_MSK:
  78                 IWL_DEBUG_INFO(priv, "REPLY_ADD_STA PASSED\n");
  79                 iwl_sta_ucode_activate(priv, sta_id);
  80                 break;
  81         case ADD_STA_NO_ROOM_IN_TABLE:
  82                 IWL_ERR(priv, "Adding station %d failed, no room in table.\n",
  83                         sta_id);
  84                 break;
  85         case ADD_STA_NO_BLOCK_ACK_RESOURCE:
  86                 IWL_ERR(priv, "Adding station %d failed, no block ack resource.\n",
  87                         sta_id);
  88                 break;
  89         case ADD_STA_MODIFY_NON_EXIST_STA:
  90                 IWL_ERR(priv, "Attempting to modify non-existing station %d\n",
  91                         sta_id);
  92                 break;
  93         default:
  94                 IWL_DEBUG_ASSOC(priv, "Received REPLY_ADD_STA:(0x%08X)\n",
  95                                 pkt->u.add_sta.status);
  96                 break;
  97         }
  98
  99         IWL_DEBUG_INFO(priv, "%s station id %u addr %pM\n",
 100                        priv->stations[sta_id].sta.mode ==
 101                        STA_CONTROL_MODIFY_MSK ?  "Modified" : "Added",
 102                        sta_id, priv->stations[sta_id].sta.sta.addr);
 103
 104         /*
 105          * XXX: The MAC address in the command buffer is often changed from
 106          * the original sent to the device. That is, the MAC address
 107          * written to the command buffer often is not the same MAC adress
 108          * read from the command buffer when the command returns. This
 109          * issue has not yet been resolved and this debugging is left to
 110          * observe the problem.
 111          */
 112         IWL_DEBUG_INFO(priv, "%s station according to cmd buffer %pM\n",
 113                        priv->stations[sta_id].sta.mode ==
 114                        STA_CONTROL_MODIFY_MSK ? "Modified" : "Added",
 115                        addsta->sta.addr);
 116         spin_unlock_irqrestore(&priv->sta_lock, flags);
 117 }
 118
 119 static void iwl_add_sta_callback(struct iwl_priv *priv,
 120                                  struct iwl_device_cmd *cmd,
 121                                  struct iwl_rx_packet *pkt)
 122 {
 123         struct iwl_addsta_cmd *addsta =
 124                 (struct iwl_addsta_cmd *)cmd->cmd.payload;
 125
 126         iwl_process_add_sta_resp(priv, addsta, pkt, false);
 127
 128 }
 129
 130 int iwl_send_add_sta(struct iwl_priv *priv,
 131                      struct iwl_addsta_cmd *sta, u8 flags)
 132 {
 133         struct iwl_rx_packet *pkt = NULL;
 134         int ret = 0;
 135         u8 data[sizeof(*sta)];
 136         struct iwl_host_cmd cmd = {
 137                 .id = REPLY_ADD_STA,
 138                 .flags = flags,
 139                 .data = data,
 140         };
 141         u8 sta_id __maybe_unused = sta->sta.sta_id;
 142
 143         IWL_DEBUG_INFO(priv, "Adding sta %u (%pM) %ssynchronously\n",
 144                        sta_id, sta->sta.addr, flags & CMD_ASYNC ?  "a" : "");
 145
 146         if (flags & CMD_ASYNC)
 147                 cmd.callback = iwl_add_sta_callback;
 148         else
 149                 cmd.flags |= CMD_WANT_SKB;
 150
 151         cmd.len = priv->cfg->ops->utils->build_addsta_hcmd(sta, data);
 152         ret = iwl_send_cmd(priv, &cmd);
 153
 154         if (ret || (flags & CMD_ASYNC))
 155                 return ret;
 156
 157         if (ret == 0) {
 158                 pkt = (struct iwl_rx_packet *)cmd.reply_page;
 159                 iwl_process_add_sta_resp(priv, sta, pkt, true);
 160         }
 161         iwl_free_pages(priv, cmd.reply_page);
 162
 163         return ret;
 164 }
 165 EXPORT_SYMBOL(iwl_send_add_sta);
 166
 167 static void iwl_set_ht_add_station(struct iwl_priv *priv, u8 index,
 168                                    struct ieee80211_sta_ht_cap *sta_ht_inf)
 169 {
 170         __le32 sta_flags;
 171         u8 mimo_ps_mode;
 172
 173         if (!sta_ht_inf || !sta_ht_inf->ht_supported)
 174                 goto done;
 175
 176         mimo_ps_mode = (sta_ht_inf->cap & IEEE80211_HT_CAP_SM_PS) >> 2;
 177         IWL_DEBUG_ASSOC(priv, "spatial multiplexing power save mode: %s\n",
 178                         (mimo_ps_mode == WLAN_HT_CAP_SM_PS_STATIC) ?
 179                         "static" :
 180                         (mimo_ps_mode == WLAN_HT_CAP_SM_PS_DYNAMIC) ?
 181                         "dynamic" : "disabled");
 182
 183         sta_flags = priv->stations[index].sta.station_flags;
 184
 185         sta_flags &= ~(STA_FLG_RTS_MIMO_PROT_MSK | STA_FLG_MIMO_DIS_MSK);
 186
 187         switch (mimo_ps_mode) {
 188         case WLAN_HT_CAP_SM_PS_STATIC:
 189                 sta_flags |= STA_FLG_MIMO_DIS_MSK;
 190                 break;
 191         case WLAN_HT_CAP_SM_PS_DYNAMIC:
 192                 sta_flags |= STA_FLG_RTS_MIMO_PROT_MSK;
 193                 break;
 194         case WLAN_HT_CAP_SM_PS_DISABLED:
 195                 break;
 196         default:
 197                 IWL_WARN(priv, "Invalid MIMO PS mode %d\n", mimo_ps_mode);
 198                 break;
 199         }
 200
 201         sta_flags |= cpu_to_le32(
 202               (u32)sta_ht_inf->ampdu_factor << STA_FLG_MAX_AGG_SIZE_POS);
 203
 204         sta_flags |= cpu_to_le32(
 205               (u32)sta_ht_inf->ampdu_density << STA_FLG_AGG_MPDU_DENSITY_POS);
 206
 207         if (iwl_is_ht40_tx_allowed(priv, sta_ht_inf))
 208                 sta_flags |= STA_FLG_HT40_EN_MSK;
 209         else
 210                 sta_flags &= ~STA_FLG_HT40_EN_MSK;
 211
 212         priv->stations[index].sta.station_flags = sta_flags;
 213  done:
 214         return;
 215 }
 216
 217 /**
 218  * iwl_prep_station - Prepare station information for addition
 219  *
 220  * should be called with sta_lock held
 221  */
 222 static u8 iwl_prep_station(struct iwl_priv *priv, const u8 *addr,
 223                            bool is_ap,
 224                            struct ieee80211_sta_ht_cap *ht_info)
 225 {
 226         struct iwl_station_entry *station;
 227         int i;
 228         u8 sta_id = IWL_INVALID_STATION;
 229         u16 rate;
 230
 231         if (is_ap)
 232                 sta_id = IWL_AP_ID;
 233         else if (is_broadcast_ether_addr(addr))
 234                 sta_id = priv->hw_params.bcast_sta_id;
 235         else
 236                 for (i = IWL_STA_ID; i < priv->hw_params.max_stations; i++) {
 237                         if (!compare_ether_addr(priv->stations[i].sta.sta.addr,
 238                                                 addr)) {
 239                                 sta_id = i;
 240                                 break;
 241                         }
 242
 243                         if (!priv->stations[i].used &&
 244                             sta_id == IWL_INVALID_STATION)
 245                                 sta_id = i;
 246                 }
 247
 248         /*
 249          * These two conditions have the same outcome, but keep them
 250          * separate
 251          */
 252         if (unlikely(sta_id == IWL_INVALID_STATION))
 253                 return sta_id;
 254
 255         /*
 256          * uCode is not able to deal with multiple requests to add a
 257          * station. Keep track if one is in progress so that we do not send
 258          * another.
 259          */
 260         if (priv->stations[sta_id].used & IWL_STA_UCODE_INPROGRESS) {
 261                 IWL_DEBUG_INFO(priv, "STA %d already in process of being added.\n",
 262                                 sta_id);
 263                 return sta_id;
 264         }
 265
 266         if ((priv->stations[sta_id].used & IWL_STA_DRIVER_ACTIVE) &&
 267             (priv->stations[sta_id].used & IWL_STA_UCODE_ACTIVE) &&
 268             !compare_ether_addr(priv->stations[sta_id].sta.sta.addr, addr)) {
 269                 IWL_DEBUG_ASSOC(priv, "STA %d (%pM) already added, not adding again.\n",
 270                                 sta_id, addr);
 271                 return sta_id;
 272         }
 273
 274         station = &priv->stations[sta_id];
 275         station->used = IWL_STA_DRIVER_ACTIVE;
 276         IWL_DEBUG_ASSOC(priv, "Add STA to driver ID %d: %pM\n",
 277                         sta_id, addr);
 278         priv->num_stations++;
 279
 280         /* Set up the REPLY_ADD_STA command to send to device */
 281         memset(&station->sta, 0, sizeof(struct iwl_addsta_cmd));
 282         memcpy(station->sta.sta.addr, addr, ETH_ALEN);
 283         station->sta.mode = 0;
 284         station->sta.sta.sta_id = sta_id;
 285         station->sta.station_flags = 0;
 286
 287         /* BCAST station and IBSS stations do not work in HT mode */
 288         if (sta_id != priv->hw_params.bcast_sta_id &&
 289             priv->iw_mode != NL80211_IFTYPE_ADHOC)
 290                 iwl_set_ht_add_station(priv, sta_id, ht_info);
 291
 292         /* 3945 only */
 293         rate = (priv->band == IEEE80211_BAND_5GHZ) ?
 294                 IWL_RATE_6M_PLCP : IWL_RATE_1M_PLCP;
 295         /* Turn on both antennas for the station... */
 296         station->sta.rate_n_flags = cpu_to_le16(rate | RATE_MCS_ANT_AB_MSK);
 297
 298         return sta_id;
 299
 300 }
 301
 302 #define STA_WAIT_TIMEOUT (HZ/2)
 303
 304 /**
 305  * iwl_add_station_common -
 306  */
 307 int iwl_add_station_common(struct iwl_priv *priv, const u8 *addr,
 308                                   bool is_ap,
 309                                   struct ieee80211_sta_ht_cap *ht_info,
 310                                   u8 *sta_id_r)
 311 {
 312         struct iwl_station_entry *station;
 313         unsigned long flags_spin;
 314         int ret = 0;
 315         u8 sta_id;
 316
 317         *sta_id_r = 0;
 318         spin_lock_irqsave(&priv->sta_lock, flags_spin);
 319         sta_id = iwl_prep_station(priv, addr, is_ap, ht_info);
 320         if (sta_id == IWL_INVALID_STATION) {
 321                 IWL_ERR(priv, "Unable to prepare station %pM for addition\n",
 322                         addr);
 323                 spin_unlock_irqrestore(&priv->sta_lock, flags_spin);
 324                 return -EINVAL;
 325         }
 326
 327         /*
 328          * uCode is not able to deal with multiple requests to add a
 329          * station. Keep track if one is in progress so that we do not send
 330          * another.
 331          */
 332         if (priv->stations[sta_id].used & IWL_STA_UCODE_INPROGRESS) {
 333                 IWL_DEBUG_INFO(priv, "STA %d already in process of being added.\n",
 334                                sta_id);
 335                 spin_unlock_irqrestore(&priv->sta_lock, flags_spin);
 336                 return -EEXIST;
 337         }
 338
 339         if ((priv->stations[sta_id].used & IWL_STA_DRIVER_ACTIVE) &&
 340             (priv->stations[sta_id].used & IWL_STA_UCODE_ACTIVE)) {
 341                 IWL_DEBUG_ASSOC(priv, "STA %d (%pM) already added, not adding again.\n",
 342                                 sta_id, addr);
 343                 spin_unlock_irqrestore(&priv->sta_lock, flags_spin);
 344                 return -EEXIST;
 345         }
 346
 347         priv->stations[sta_id].used |= IWL_STA_UCODE_INPROGRESS;
 348         station = &priv->stations[sta_id];
 349         spin_unlock_irqrestore(&priv->sta_lock, flags_spin);
 350
 351         /* Add station to device's station table */
 352         ret = iwl_send_add_sta(priv, &station->sta, CMD_SYNC);
 353         if (ret) {
 354                 IWL_ERR(priv, "Adding station %pM failed.\n", station->sta.sta.addr);
 355                 spin_lock_irqsave(&priv->sta_lock, flags_spin);
 356                 priv->stations[sta_id].used &= ~IWL_STA_DRIVER_ACTIVE;
 357                 priv->stations[sta_id].used &= ~IWL_STA_UCODE_INPROGRESS;
 358                 spin_unlock_irqrestore(&priv->sta_lock, flags_spin);
 359         }
 360         *sta_id_r = sta_id;
 361         return ret;
 362 }
 363 EXPORT_SYMBOL(iwl_add_station_common);
 364
 365 static struct iwl_link_quality_cmd *iwl_sta_alloc_lq(struct iwl_priv *priv,
 366                                                      u8 sta_id)
 367 {
 368         int i, r;
 369         struct iwl_link_quality_cmd *link_cmd;
 370         u32 rate_flags;
 371
 372         link_cmd = kzalloc(sizeof(struct iwl_link_quality_cmd), GFP_KERNEL);
 373         if (!link_cmd) {
 374                 IWL_ERR(priv, "Unable to allocate memory for LQ cmd.\n");
 375                 return NULL;
 376         }
 377         /* Set up the rate scaling to start at selected rate, fall back
 378          * all the way down to 1M in IEEE order, and then spin on 1M */
 379         if (priv->band == IEEE80211_BAND_5GHZ)
 380                 r = IWL_RATE_6M_INDEX;
 381         else
 382                 r = IWL_RATE_1M_INDEX;
 383
 384         for (i = 0; i < LINK_QUAL_MAX_RETRY_NUM; i++) {
 385                 rate_flags = 0;
 386                 if (r >= IWL_FIRST_CCK_RATE && r <= IWL_LAST_CCK_RATE)
 387                         rate_flags |= RATE_MCS_CCK_MSK;
 388
 389                 rate_flags |= first_antenna(priv->hw_params.valid_tx_ant) <<
 390                                 RATE_MCS_ANT_POS;
 391
 392                 link_cmd->rs_table[i].rate_n_flags =
 393                         iwl_hw_set_rate_n_flags(iwl_rates[r].plcp, rate_flags);
 394                 r = iwl_get_prev_ieee_rate(r);
 395         }
 396
 397         link_cmd->general_params.single_stream_ant_msk =
 398                                 first_antenna(priv->hw_params.valid_tx_ant);
 399
 400         link_cmd->general_params.dual_stream_ant_msk =
 401                 priv->hw_params.valid_tx_ant &
 402                 ~first_antenna(priv->hw_params.valid_tx_ant);
 403         if (!link_cmd->general_params.dual_stream_ant_msk) {
 404                 link_cmd->general_params.dual_stream_ant_msk = ANT_AB;
 405         } else if (num_of_ant(priv->hw_params.valid_tx_ant) == 2) {
 406                 link_cmd->general_params.dual_stream_ant_msk =
 407                         priv->hw_params.valid_tx_ant;
 408         }
 409
 410         link_cmd->agg_params.agg_dis_start_th = LINK_QUAL_AGG_DISABLE_START_DEF;
 411         link_cmd->agg_params.agg_time_limit =
 412                 cpu_to_le16(LINK_QUAL_AGG_TIME_LIMIT_DEF);
 413
 414         link_cmd->sta_id = sta_id;
 415
 416         return link_cmd;
 417 }
 418
 419 /*
 420  * iwl_add_local_station - Add stations not requested by mac80211
 421  *
 422  * This will be either the broadcast station or the bssid station needed by
 423  * ad-hoc.
 424  *
 425  * Function sleeps.
 426  */
 427 int iwl_add_local_station(struct iwl_priv *priv, const u8 *addr, bool init_rs,
 428                           u8 *sta_id_r)
 429 {
 430         int ret;
 431         u8 sta_id;
 432         struct iwl_link_quality_cmd *link_cmd;
 433         unsigned long flags;
 434
 435         if (*sta_id_r)
 436                 *sta_id_r = IWL_INVALID_STATION;
 437
 438         ret = iwl_add_station_common(priv, addr, 0, NULL, &sta_id);
 439         if (ret) {
 440                 IWL_ERR(priv, "Unable to add station %pM\n", addr);
 441                 return ret;
 442         }
 443
 444         if (sta_id_r)
 445                 *sta_id_r = sta_id;
 446
 447         spin_lock_irqsave(&priv->sta_lock, flags);
 448         priv->stations[sta_id].used |= IWL_STA_LOCAL;
 449         spin_unlock_irqrestore(&priv->sta_lock, flags);
 450
 451         if (init_rs) {
 452                 /* Set up default rate scaling table in device's station table */
 453                 link_cmd = iwl_sta_alloc_lq(priv, sta_id);
 454                 if (!link_cmd) {
 455                         IWL_ERR(priv, "Unable to initialize rate scaling for station %pM.\n",
 456                                 addr);
 457                         return -ENOMEM;
 458                 }
 459
 460                 ret = iwl_send_lq_cmd(priv, link_cmd, CMD_SYNC, true);
 461                 if (ret)
 462                         IWL_ERR(priv, "Link quality command failed (%d)\n", ret);
 463
 464                 spin_lock_irqsave(&priv->sta_lock, flags);
 465                 priv->stations[sta_id].lq = link_cmd;
 466                 spin_unlock_irqrestore(&priv->sta_lock, flags);
 467         }
 468
 469         return 0;
 470 }
 471 EXPORT_SYMBOL(iwl_add_local_station);
 472
 473 /**
 474  * iwl_sta_ucode_deactivate - deactivate ucode status for a station
 475  *
 476  * priv->sta_lock must be held
 477  */
 478 static void iwl_sta_ucode_deactivate(struct iwl_priv *priv, u8 sta_id)
 479 {
 480         /* Ucode must be active and driver must be non active */
 481         if ((priv->stations[sta_id].used &
 482              (IWL_STA_UCODE_ACTIVE | IWL_STA_DRIVER_ACTIVE)) != IWL_STA_UCODE_ACTIVE)
 483                 IWL_ERR(priv, "removed non active STA %u\n", sta_id);
 484
 485         priv->stations[sta_id].used &= ~IWL_STA_UCODE_ACTIVE;
 486
 487         memset(&priv->stations[sta_id], 0, sizeof(struct iwl_station_entry));
 488         IWL_DEBUG_ASSOC(priv, "Removed STA %u\n", sta_id);
 489 }
 490
 491 static int iwl_send_remove_station(struct iwl_priv *priv,
 492                                    struct iwl_station_entry *station)
 493 {
 494         struct iwl_rx_packet *pkt;
 495         int ret;
 496
 497         unsigned long flags_spin;
 498         struct iwl_rem_sta_cmd rm_sta_cmd;
 499
 500         struct iwl_host_cmd cmd = {
 501                 .id = REPLY_REMOVE_STA,
 502                 .len = sizeof(struct iwl_rem_sta_cmd),
 503                 .flags = CMD_SYNC,
 504                 .data = &rm_sta_cmd,
 505         };
 506
 507         memset(&rm_sta_cmd, 0, sizeof(rm_sta_cmd));
 508         rm_sta_cmd.num_sta = 1;
 509         memcpy(&rm_sta_cmd.addr, &station->sta.sta.addr , ETH_ALEN);
 510
 511         cmd.flags |= CMD_WANT_SKB;
 512
 513         ret = iwl_send_cmd(priv, &cmd);
 514
 515         if (ret)
 516                 return ret;
 517
 518         pkt = (struct iwl_rx_packet *)cmd.reply_page;
 519         if (pkt->hdr.flags & IWL_CMD_FAILED_MSK) {
 520                 IWL_ERR(priv, "Bad return from REPLY_REMOVE_STA (0x%08X)\n",
 521                           pkt->hdr.flags);
 522                 ret = -EIO;
 523         }
 524
 525         if (!ret) {
 526                 switch (pkt->u.rem_sta.status) {
 527                 case REM_STA_SUCCESS_MSK:
 528                         spin_lock_irqsave(&priv->sta_lock, flags_spin);
 529                         iwl_sta_ucode_deactivate(priv, station->sta.sta.sta_id);
 530                         spin_unlock_irqrestore(&priv->sta_lock, flags_spin);
 531                         IWL_DEBUG_ASSOC(priv, "REPLY_REMOVE_STA PASSED\n");
 532                         break;
 533                 default:
 534                         ret = -EIO;
 535                         IWL_ERR(priv, "REPLY_REMOVE_STA failed\n");
 536                         break;
 537                 }
 538         }
 539         iwl_free_pages(priv, cmd.reply_page);
 540
 541         return ret;
 542 }
 543
 544 /**
 545  * iwl_remove_station - Remove driver's knowledge of station.
 546  */
 547 int iwl_remove_station(struct iwl_priv *priv, const u8 sta_id,
 548                        const u8 *addr)
 549 {
 550         struct iwl_station_entry *station;
 551         unsigned long flags;
 552
 553         if (!iwl_is_ready(priv)) {
 554                 IWL_DEBUG_INFO(priv,
 555                         "Unable to remove station %pM, device not ready.\n",
 556                         addr);
 557                 /*
 558                  * It is typical for stations to be removed when we are
 559                  * going down. Return success since device will be down
 560                  * soon anyway
 561                  */
 562                 return 0;
 563         }
 564
 565         IWL_DEBUG_ASSOC(priv, "Removing STA from driver:%d  %pM\n",
 566                         sta_id, addr);
 567
 568         if (WARN_ON(sta_id == IWL_INVALID_STATION))
 569                 return -EINVAL;
 570
 571         spin_lock_irqsave(&priv->sta_lock, flags);
 572
 573         if (!(priv->stations[sta_id].used & IWL_STA_DRIVER_ACTIVE)) {
 574                 IWL_DEBUG_INFO(priv, "Removing %pM but non DRIVER active\n",
 575                                 addr);
 576                 goto out_err;
 577         }
 578
 579         if (!(priv->stations[sta_id].used & IWL_STA_UCODE_ACTIVE)) {
 580                 IWL_DEBUG_INFO(priv, "Removing %pM but non UCODE active\n",
 581                                 addr);
 582                 goto out_err;
 583         }
 584
 585         if (priv->stations[sta_id].used & IWL_STA_LOCAL) {
 586                 kfree(priv->stations[sta_id].lq);
 587                 priv->stations[sta_id].lq = NULL;
 588         }
 589
 590         priv->stations[sta_id].used &= ~IWL_STA_DRIVER_ACTIVE;
 591
 592         priv->num_stations--;
 593
 594         BUG_ON(priv->num_stations < 0);
 595
 596         station = &priv->stations[sta_id];
 597         spin_unlock_irqrestore(&priv->sta_lock, flags);
 598
 599         return iwl_send_remove_station(priv, station);
 600 out_err:
 601         spin_unlock_irqrestore(&priv->sta_lock, flags);
 602         return -EINVAL;
 603 }
 604 EXPORT_SYMBOL_GPL(iwl_remove_station);
 605
 606 /**
 607  * iwl_clear_ucode_stations - clear ucode station table bits
 608  *
 609  * This function clears all the bits in the driver indicating
 610  * which stations are active in the ucode. Call when something
 611  * other than explicit station management would cause this in
 612  * the ucode, e.g. unassociated RXON.
 613  */
 614 void iwl_clear_ucode_stations(struct iwl_priv *priv)
 615 {
 616         int i;
 617         unsigned long flags_spin;
 618         bool cleared = false;
 619
 620         IWL_DEBUG_INFO(priv, "Clearing ucode stations in driver\n");
 621
 622         spin_lock_irqsave(&priv->sta_lock, flags_spin);
 623         for (i = 0; i < priv->hw_params.max_stations; i++) {
 624                 if (priv->stations[i].used & IWL_STA_UCODE_ACTIVE) {
 625                         IWL_DEBUG_INFO(priv, "Clearing ucode active for station %d\n", i);
 626                         priv->stations[i].used &= ~IWL_STA_UCODE_ACTIVE;
 627                         cleared = true;
 628                 }
 629         }
 630         spin_unlock_irqrestore(&priv->sta_lock, flags_spin);
 631
 632         if (!cleared)
 633                 IWL_DEBUG_INFO(priv, "No active stations found to be cleared\n");
 634 }
 635 EXPORT_SYMBOL(iwl_clear_ucode_stations);
 636
 637 /**
 638  * iwl_restore_stations() - Restore driver known stations to device
 639  *
 640  * All stations considered active by driver, but not present in ucode, is
 641  * restored.
 642  *
 643  * Function sleeps.
 644  */
 645 void iwl_restore_stations(struct iwl_priv *priv)
 646 {
 647         struct iwl_station_entry *station;
 648         unsigned long flags_spin;
 649         int i;
 650         bool found = false;
 651         int ret;
 652
 653         if (!iwl_is_ready(priv)) {
 654                 IWL_DEBUG_INFO(priv, "Not ready yet, not restoring any stations.\n");
 655                 return;
 656         }
 657
 658         IWL_DEBUG_ASSOC(priv, "Restoring all known stations ... start.\n");
 659         spin_lock_irqsave(&priv->sta_lock, flags_spin);
 660         for (i = 0; i < priv->hw_params.max_stations; i++) {
 661                 if ((priv->stations[i].used & IWL_STA_DRIVER_ACTIVE) &&
 662                             !(priv->stations[i].used & IWL_STA_UCODE_ACTIVE)) {
 663                         IWL_DEBUG_ASSOC(priv, "Restoring sta %pM\n",
 664                                         priv->stations[i].sta.sta.addr);
 665                         priv->stations[i].sta.mode = 0;
 666                         priv->stations[i].used |= IWL_STA_UCODE_INPROGRESS;
 667                         found = true;
 668                 }
 669         }
 670
 671         for (i = 0; i < priv->hw_params.max_stations; i++) {
 672                 if ((priv->stations[i].used & IWL_STA_UCODE_INPROGRESS)) {
 673                         spin_unlock_irqrestore(&priv->sta_lock, flags_spin);
 674                         station = &priv->stations[i];
 675                         ret = iwl_send_add_sta(priv, &priv->stations[i].sta, CMD_SYNC);
 676                         if (ret) {
 677                                 IWL_ERR(priv, "Adding station %pM failed.\n",
 678                                         station->sta.sta.addr);
 679                                 spin_lock_irqsave(&priv->sta_lock, flags_spin);
 680                                 priv->stations[i].used &= ~IWL_STA_DRIVER_ACTIVE;
 681                                 priv->stations[i].used &= ~IWL_STA_UCODE_INPROGRESS;
 682                                 spin_unlock_irqrestore(&priv->sta_lock, flags_spin);
 683                         }
 684                         /*
 685                          * Rate scaling has already been initialized, send
 686                          * current LQ command
 687                          */
 688                         if (station->lq)
 689                                 iwl_send_lq_cmd(priv, station->lq, CMD_SYNC, true);
 690                         spin_lock_irqsave(&priv->sta_lock, flags_spin);
 691                         priv->stations[i].used &= ~IWL_STA_UCODE_INPROGRESS;
 692                 }
 693         }
 694
 695         spin_unlock_irqrestore(&priv->sta_lock, flags_spin);
 696         if (!found)
 697                 IWL_DEBUG_INFO(priv, "Restoring all known stations .... no stations to be restored.\n");
 698         else
 699                 IWL_DEBUG_INFO(priv, "Restoring all known stations .... complete.\n");
 700 }
 701 EXPORT_SYMBOL(iwl_restore_stations);
 702
 703 int iwl_get_free_ucode_key_index(struct iwl_priv *priv)
 704 {
 705         int i;
 706
 707         for (i = 0; i < STA_KEY_MAX_NUM; i++)
 708                 if (!test_and_set_bit(i, &priv->ucode_key_table))
 709                         return i;
 710
 711         return WEP_INVALID_OFFSET;
 712 }
 713 EXPORT_SYMBOL(iwl_get_free_ucode_key_index);
 714
 715 static int iwl_send_static_wepkey_cmd(struct iwl_priv *priv, u8 send_if_empty)
 716 {
 717         int i, not_empty = 0;
 718         u8 buff[sizeof(struct iwl_wep_cmd) +
 719                 sizeof(struct iwl_wep_key) * WEP_KEYS_MAX];
 720         struct iwl_wep_cmd *wep_cmd = (struct iwl_wep_cmd *)buff;
 721         size_t cmd_size  = sizeof(struct iwl_wep_cmd);
 722         struct iwl_host_cmd cmd = {
 723                 .id = REPLY_WEPKEY,
 724                 .data = wep_cmd,
 725                 .flags = CMD_SYNC,
 726         };
 727
 728         might_sleep();
 729
 730         memset(wep_cmd, 0, cmd_size +
 731                         (sizeof(struct iwl_wep_key) * WEP_KEYS_MAX));
 732
 733         for (i = 0; i < WEP_KEYS_MAX ; i++) {
 734                 wep_cmd->key[i].key_index = i;
 735                 if (priv->wep_keys[i].key_size) {
 736                         wep_cmd->key[i].key_offset = i;
 737                         not_empty = 1;
 738                 } else {
 739                         wep_cmd->key[i].key_offset = WEP_INVALID_OFFSET;
 740                 }
 741
 742                 wep_cmd->key[i].key_size = priv->wep_keys[i].key_size;
 743                 memcpy(&wep_cmd->key[i].key[3], priv->wep_keys[i].key,
 744                                 priv->wep_keys[i].key_size);
 745         }
 746
 747         wep_cmd->global_key_type = WEP_KEY_WEP_TYPE;
 748         wep_cmd->num_keys = WEP_KEYS_MAX;
 749
 750         cmd_size += sizeof(struct iwl_wep_key) * WEP_KEYS_MAX;
 751
 752         cmd.len = cmd_size;
 753
 754         if (not_empty || send_if_empty)
 755                 return iwl_send_cmd(priv, &cmd);
 756         else
 757                 return 0;
 758 }
 759
 760 int iwl_restore_default_wep_keys(struct iwl_priv *priv)
 761 {
 762         WARN_ON(!mutex_is_locked(&priv->mutex));
 763
 764         return iwl_send_static_wepkey_cmd(priv, 0);
 765 }
 766 EXPORT_SYMBOL(iwl_restore_default_wep_keys);
 767
 768 int iwl_remove_default_wep_key(struct iwl_priv *priv,
 769                                struct ieee80211_key_conf *keyconf)
 770 {
 771         int ret;
 772
 773         WARN_ON(!mutex_is_locked(&priv->mutex));
 774
 775         IWL_DEBUG_WEP(priv, "Removing default WEP key: idx=%d\n",
 776                       keyconf->keyidx);
 777
 778         memset(&priv->wep_keys[keyconf->keyidx], 0, sizeof(priv->wep_keys[0]));
 779         if (iwl_is_rfkill(priv)) {
 780                 IWL_DEBUG_WEP(priv, "Not sending REPLY_WEPKEY command due to RFKILL.\n");
 781                 /* but keys in device are clear anyway so return success */
 782                 return 0;
 783         }
 784         ret = iwl_send_static_wepkey_cmd(priv, 1);
 785         IWL_DEBUG_WEP(priv, "Remove default WEP key: idx=%d ret=%d\n",
 786                       keyconf->keyidx, ret);
 787
 788         return ret;
 789 }
 790 EXPORT_SYMBOL(iwl_remove_default_wep_key);
 791
 792 int iwl_set_default_wep_key(struct iwl_priv *priv,
 793                             struct ieee80211_key_conf *keyconf)
 794 {
 795         int ret;
 796
 797         WARN_ON(!mutex_is_locked(&priv->mutex));
 798
 799         if (keyconf->keylen != WEP_KEY_LEN_128 &&
 800             keyconf->keylen != WEP_KEY_LEN_64) {
 801                 IWL_DEBUG_WEP(priv, "Bad WEP key length %d\n", keyconf->keylen);
 802                 return -EINVAL;
 803         }
 804
 805         keyconf->flags &= ~IEEE80211_KEY_FLAG_GENERATE_IV;
 806         keyconf->hw_key_idx = HW_KEY_DEFAULT;
 807         priv->stations[IWL_AP_ID].keyinfo.alg = ALG_WEP;
 808
 809         priv->wep_keys[keyconf->keyidx].key_size = keyconf->keylen;
 810         memcpy(&priv->wep_keys[keyconf->keyidx].key, &keyconf->key,
 811                                                         keyconf->keylen);
 812
 813         ret = iwl_send_static_wepkey_cmd(priv, 0);
 814         IWL_DEBUG_WEP(priv, "Set default WEP key: len=%d idx=%d ret=%d\n",
 815                 keyconf->keylen, keyconf->keyidx, ret);
 816
 817         return ret;
 818 }
 819 EXPORT_SYMBOL(iwl_set_default_wep_key);
 820
 821 static int iwl_set_wep_dynamic_key_info(struct iwl_priv *priv,
 822                                 struct ieee80211_key_conf *keyconf,
 823                                 u8 sta_id)
 824 {
 825         unsigned long flags;
 826         __le16 key_flags = 0;
 827         int ret;
 828
 829         keyconf->flags &= ~IEEE80211_KEY_FLAG_GENERATE_IV;
 830
 831         key_flags |= (STA_KEY_FLG_WEP | STA_KEY_FLG_MAP_KEY_MSK);
 832         key_flags |= cpu_to_le16(keyconf->keyidx << STA_KEY_FLG_KEYID_POS);
 833         key_flags &= ~STA_KEY_FLG_INVALID;
 834
 835         if (keyconf->keylen == WEP_KEY_LEN_128)
 836                 key_flags |= STA_KEY_FLG_KEY_SIZE_MSK;
 837
 838         if (sta_id == priv->hw_params.bcast_sta_id)
 839                 key_flags |= STA_KEY_MULTICAST_MSK;
 840
 841         spin_lock_irqsave(&priv->sta_lock, flags);
 842
 843         priv->stations[sta_id].keyinfo.alg = keyconf->alg;
 844         priv->stations[sta_id].keyinfo.keylen = keyconf->keylen;
 845         priv->stations[sta_id].keyinfo.keyidx = keyconf->keyidx;
 846
 847         memcpy(priv->stations[sta_id].keyinfo.key,
 848                                 keyconf->key, keyconf->keylen);
 849
 850         memcpy(&priv->stations[sta_id].sta.key.key[3],
 851                                 keyconf->key, keyconf->keylen);
 852
 853         if ((priv->stations[sta_id].sta.key.key_flags & STA_KEY_FLG_ENCRYPT_MSK)
 854                         == STA_KEY_FLG_NO_ENC)
 855                 priv->stations[sta_id].sta.key.key_offset =
 856                                  iwl_get_free_ucode_key_index(priv);
 857         /* else, we are overriding an existing key => no need to allocated room
 858          * in uCode. */
 859
 860         WARN(priv->stations[sta_id].sta.key.key_offset == WEP_INVALID_OFFSET,
 861                 "no space for a new key");
 862
 863         priv->stations[sta_id].sta.key.key_flags = key_flags;
 864         priv->stations[sta_id].sta.sta.modify_mask = STA_MODIFY_KEY_MASK;
 865         priv->stations[sta_id].sta.mode = STA_CONTROL_MODIFY_MSK;
 866
 867         ret = iwl_send_add_sta(priv, &priv->stations[sta_id].sta, CMD_ASYNC);
 868
 869         spin_unlock_irqrestore(&priv->sta_lock, flags);
 870
 871         return ret;
 872 }
 873
 874 static int iwl_set_ccmp_dynamic_key_info(struct iwl_priv *priv,
 875                                    struct ieee80211_key_conf *keyconf,
 876                                    u8 sta_id)
 877 {
 878         unsigned long flags;
 879         __le16 key_flags = 0;
 880         int ret;
 881
 882         key_flags |= (STA_KEY_FLG_CCMP | STA_KEY_FLG_MAP_KEY_MSK);
 883         key_flags |= cpu_to_le16(keyconf->keyidx << STA_KEY_FLG_KEYID_POS);
 884         key_flags &= ~STA_KEY_FLG_INVALID;
 885
 886         if (sta_id == priv->hw_params.bcast_sta_id)
 887                 key_flags |= STA_KEY_MULTICAST_MSK;
 888
 889         keyconf->flags |= IEEE80211_KEY_FLAG_GENERATE_IV;
 890
 891         spin_lock_irqsave(&priv->sta_lock, flags);
 892         priv->stations[sta_id].keyinfo.alg = keyconf->alg;
 893         priv->stations[sta_id].keyinfo.keylen = keyconf->keylen;
 894
 895         memcpy(priv->stations[sta_id].keyinfo.key, keyconf->key,
 896                keyconf->keylen);
 897
 898         memcpy(priv->stations[sta_id].sta.key.key, keyconf->key,
 899                keyconf->keylen);
 900
 901         if ((priv->stations[sta_id].sta.key.key_flags & STA_KEY_FLG_ENCRYPT_MSK)
 902                         == STA_KEY_FLG_NO_ENC)
 903                 priv->stations[sta_id].sta.key.key_offset =
 904                                  iwl_get_free_ucode_key_index(priv);
 905         /* else, we are overriding an existing key => no need to allocated room
 906          * in uCode. */
 907
 908         WARN(priv->stations[sta_id].sta.key.key_offset == WEP_INVALID_OFFSET,
 909                 "no space for a new key");
 910
 911         priv->stations[sta_id].sta.key.key_flags = key_flags;
 912         priv->stations[sta_id].sta.sta.modify_mask = STA_MODIFY_KEY_MASK;
 913         priv->stations[sta_id].sta.mode = STA_CONTROL_MODIFY_MSK;
 914
 915         ret = iwl_send_add_sta(priv, &priv->stations[sta_id].sta, CMD_ASYNC);
 916
 917         spin_unlock_irqrestore(&priv->sta_lock, flags);
 918
 919         return ret;
 920 }
 921
 922 static int iwl_set_tkip_dynamic_key_info(struct iwl_priv *priv,
 923                                    struct ieee80211_key_conf *keyconf,
 924                                    u8 sta_id)
 925 {
 926         unsigned long flags;
 927         int ret = 0;
 928         __le16 key_flags = 0;
 929
 930         key_flags |= (STA_KEY_FLG_TKIP | STA_KEY_FLG_MAP_KEY_MSK);
 931         key_flags |= cpu_to_le16(keyconf->keyidx << STA_KEY_FLG_KEYID_POS);
 932         key_flags &= ~STA_KEY_FLG_INVALID;
 933
 934         if (sta_id == priv->hw_params.bcast_sta_id)
 935                 key_flags |= STA_KEY_MULTICAST_MSK;
 936
 937         keyconf->flags |= IEEE80211_KEY_FLAG_GENERATE_IV;
 938         keyconf->flags |= IEEE80211_KEY_FLAG_GENERATE_MMIC;
 939
 940         spin_lock_irqsave(&priv->sta_lock, flags);
 941
 942         priv->stations[sta_id].keyinfo.alg = keyconf->alg;
 943         priv->stations[sta_id].keyinfo.keylen = 16;
 944
 945         if ((priv->stations[sta_id].sta.key.key_flags & STA_KEY_FLG_ENCRYPT_MSK)
 946                         == STA_KEY_FLG_NO_ENC)
 947                 priv->stations[sta_id].sta.key.key_offset =
 948                                  iwl_get_free_ucode_key_index(priv);
 949         /* else, we are overriding an existing key => no need to allocated room
 950          * in uCode. */
 951
 952         WARN(priv->stations[sta_id].sta.key.key_offset == WEP_INVALID_OFFSET,
 953                 "no space for a new key");
 954
 955         priv->stations[sta_id].sta.key.key_flags = key_flags;
 956
 957
 958         /* This copy is acutally not needed: we get the key with each TX */
 959         memcpy(priv->stations[sta_id].keyinfo.key, keyconf->key, 16);
 960
 961         memcpy(priv->stations[sta_id].sta.key.key, keyconf->key, 16);
 962
 963         spin_unlock_irqrestore(&priv->sta_lock, flags);
 964
 965         return ret;
 966 }
 967
 968 void iwl_update_tkip_key(struct iwl_priv *priv,
 969                         struct ieee80211_key_conf *keyconf,
 970                         struct ieee80211_sta *sta, u32 iv32, u16 *phase1key)
 971 {
 972         u8 sta_id;
 973         unsigned long flags;
 974         int i;
 975
 976         if (sta) {
 977                 sta_id = iwl_sta_id(sta);
 978
 979                 if (sta_id == IWL_INVALID_STATION) {
 980                         IWL_DEBUG_MAC80211(priv, "leave - %pM not initialised.\n",
 981                                            sta->addr);
 982                         return;
 983                 }
 984         } else
 985                 sta_id = priv->hw_params.bcast_sta_id;
 986
 987
 988         if (iwl_scan_cancel(priv)) {
 989                 /* cancel scan failed, just live w/ bad key and rely
 990                    briefly on SW decryption */
 991                 return;
 992         }
 993
 994         spin_lock_irqsave(&priv->sta_lock, flags);
 995
 996         priv->stations[sta_id].sta.key.tkip_rx_tsc_byte2 = (u8) iv32;
 997
 998         for (i = 0; i < 5; i++)
 999                 priv->stations[sta_id].sta.key.tkip_rx_ttak[i] =
1000                         cpu_to_le16(phase1key[i]);
1001
1002         priv->stations[sta_id].sta.sta.modify_mask = STA_MODIFY_KEY_MASK;
1003         priv->stations[sta_id].sta.mode = STA_CONTROL_MODIFY_MSK;
1004
1005         iwl_send_add_sta(priv, &priv->stations[sta_id].sta, CMD_ASYNC);
1006
1007         spin_unlock_irqrestore(&priv->sta_lock, flags);
1008
1009 }
1010 EXPORT_SYMBOL(iwl_update_tkip_key);
1011
1012 int iwl_remove_dynamic_key(struct iwl_priv *priv,
1013                                 struct ieee80211_key_conf *keyconf,
1014                                 u8 sta_id)
1015 {
1016         unsigned long flags;
1017         int ret = 0;
1018         u16 key_flags;
1019         u8 keyidx;
1020
1021         priv->key_mapping_key--;
1022
1023         spin_lock_irqsave(&priv->sta_lock, flags);
1024         key_flags = le16_to_cpu(priv->stations[sta_id].sta.key.key_flags);
1025         keyidx = (key_flags >> STA_KEY_FLG_KEYID_POS) & 0x3;
1026
1027         IWL_DEBUG_WEP(priv, "Remove dynamic key: idx=%d sta=%d\n",
1028                       keyconf->keyidx, sta_id);
1029
1030         if (keyconf->keyidx != keyidx) {
1031                 /* We need to remove a key with index different that the one
1032                  * in the uCode. This means that the key we need to remove has
1033                  * been replaced by another one with different index.
1034                  * Don't do anything and return ok
1035                  */
1036                 spin_unlock_irqrestore(&priv->sta_lock, flags);
1037                 return 0;
1038         }
1039
1040         if (priv->stations[sta_id].sta.key.key_offset == WEP_INVALID_OFFSET) {
1041                 IWL_WARN(priv, "Removing wrong key %d 0x%x\n",
1042                             keyconf->keyidx, key_flags);
1043                 spin_unlock_irqrestore(&priv->sta_lock, flags);
1044                 return 0;
1045         }
1046
1047         if (!test_and_clear_bit(priv->stations[sta_id].sta.key.key_offset,
1048                 &priv->ucode_key_table))
1049                 IWL_ERR(priv, "index %d not used in uCode key table.\n",
1050                         priv->stations[sta_id].sta.key.key_offset);
1051         memset(&priv->stations[sta_id].keyinfo, 0,
1052                                         sizeof(struct iwl_hw_key));
1053         memset(&priv->stations[sta_id].sta.key, 0,
1054                                         sizeof(struct iwl4965_keyinfo));
1055         priv->stations[sta_id].sta.key.key_flags =
1056                         STA_KEY_FLG_NO_ENC | STA_KEY_FLG_INVALID;
1057         priv->stations[sta_id].sta.key.key_offset = WEP_INVALID_OFFSET;
1058         priv->stations[sta_id].sta.sta.modify_mask = STA_MODIFY_KEY_MASK;
1059         priv->stations[sta_id].sta.mode = STA_CONTROL_MODIFY_MSK;
1060
1061         if (iwl_is_rfkill(priv)) {
1062                 IWL_DEBUG_WEP(priv, "Not sending REPLY_ADD_STA command because RFKILL enabled.\n");
1063                 spin_unlock_irqrestore(&priv->sta_lock, flags);
1064                 return 0;
1065         }
1066         ret =  iwl_send_add_sta(priv, &priv->stations[sta_id].sta, CMD_ASYNC);
1067         spin_unlock_irqrestore(&priv->sta_lock, flags);
1068         return ret;
1069 }
1070 EXPORT_SYMBOL(iwl_remove_dynamic_key);
1071
1072 int iwl_set_dynamic_key(struct iwl_priv *priv,
1073                                 struct ieee80211_key_conf *keyconf, u8 sta_id)
1074 {
1075         int ret;
1076
1077         priv->key_mapping_key++;
1078         keyconf->hw_key_idx = HW_KEY_DYNAMIC;
1079
1080         switch (keyconf->alg) {
1081         case ALG_CCMP:
1082                 ret = iwl_set_ccmp_dynamic_key_info(priv, keyconf, sta_id);
1083                 break;
1084         case ALG_TKIP:
1085                 ret = iwl_set_tkip_dynamic_key_info(priv, keyconf, sta_id);
1086                 break;
1087         case ALG_WEP:
1088                 ret = iwl_set_wep_dynamic_key_info(priv, keyconf, sta_id);
1089                 break;
1090         default:
1091                 IWL_ERR(priv,
1092                         "Unknown alg: %s alg = %d\n", __func__, keyconf->alg);
1093                 ret = -EINVAL;
1094         }
1095
1096         IWL_DEBUG_WEP(priv, "Set dynamic key: alg= %d len=%d idx=%d sta=%d ret=%d\n",
1097                       keyconf->alg, keyconf->keylen, keyconf->keyidx,
1098                       sta_id, ret);
1099
1100         return ret;
1101 }
1102 EXPORT_SYMBOL(iwl_set_dynamic_key);
1103
1104 #ifdef CONFIG_IWLWIFI_DEBUG
1105 static void iwl_dump_lq_cmd(struct iwl_priv *priv,
1106                            struct iwl_link_quality_cmd *lq)
1107 {
1108         int i;
1109         IWL_DEBUG_RATE(priv, "lq station id 0x%x\n", lq->sta_id);
1110         IWL_DEBUG_RATE(priv, "lq ant 0x%X 0x%X\n",
1111                        lq->general_params.single_stream_ant_msk,
1112                        lq->general_params.dual_stream_ant_msk);
1113
1114         for (i = 0; i < LINK_QUAL_MAX_RETRY_NUM; i++)
1115                 IWL_DEBUG_RATE(priv, "lq index %d 0x%X\n",
1116                                i, lq->rs_table[i].rate_n_flags);
1117 }
1118 #else
1119 static inline void iwl_dump_lq_cmd(struct iwl_priv *priv,
1120                                    struct iwl_link_quality_cmd *lq)
1121 {
1122 }
1123 #endif
1124
1125 /**
1126  * is_lq_table_valid() - Test one aspect of LQ cmd for validity
1127  *
1128  * It sometimes happens when a HT rate has been in use and we
1129  * loose connectivity with AP then mac80211 will first tell us that the
1130  * current channel is not HT anymore before removing the station. In such a
1131  * scenario the RXON flags will be updated to indicate we are not
1132  * communicating HT anymore, but the LQ command may still contain HT rates.
1133  * Test for this to prevent driver from sending LQ command between the time
1134  * RXON flags are updated and when LQ command is updated.
1135  */
1136 static bool is_lq_table_valid(struct iwl_priv *priv,
1137                               struct iwl_link_quality_cmd *lq)
1138 {
1139         int i;
1140         struct iwl_ht_config *ht_conf = &priv->current_ht_config;
1141
1142         if (ht_conf->is_ht)
1143                 return true;
1144
1145         IWL_DEBUG_INFO(priv, "Channel %u is not an HT channel\n",
1146                        priv->active_rxon.channel);
1147         for (i = 0; i < LINK_QUAL_MAX_RETRY_NUM; i++) {
1148                 if (le32_to_cpu(lq->rs_table[i].rate_n_flags) & RATE_MCS_HT_MSK) {
1149                         IWL_DEBUG_INFO(priv,
1150                                        "index %d of LQ expects HT channel\n",
1151                                        i);
1152                         return false;
1153                 }
1154         }
1155         return true;
1156 }
1157
1158 /**
1159  * iwl_send_lq_cmd() - Send link quality command
1160  * @init: This command is sent as part of station initialization right
1161  *        after station has been added.
1162  *
1163  * The link quality command is sent as the last step of station creation.
1164  * This is the special case in which init is set and we call a callback in
1165  * this case to clear the state indicating that station creation is in
1166  * progress.
1167  */
1168 int iwl_send_lq_cmd(struct iwl_priv *priv,
1169                     struct iwl_link_quality_cmd *lq, u8 flags, bool init)
1170 {
1171         int ret = 0;
1172         unsigned long flags_spin;
1173
1174         struct iwl_host_cmd cmd = {
1175                 .id = REPLY_TX_LINK_QUALITY_CMD,
1176                 .len = sizeof(struct iwl_link_quality_cmd),
1177                 .flags = flags,
1178                 .data = lq,
1179         };
1180
1181         if (WARN_ON(lq->sta_id == IWL_INVALID_STATION))
1182                 return -EINVAL;
1183
1184         iwl_dump_lq_cmd(priv, lq);
1185         BUG_ON(init && (cmd.flags & CMD_ASYNC));
1186
1187         if (is_lq_table_valid(priv, lq))
1188                 ret = iwl_send_cmd(priv, &cmd);
1189         else
1190                 ret = -EINVAL;
1191
1192         if (cmd.flags & CMD_ASYNC)
1193                 return ret;
1194
1195         if (init) {
1196                 IWL_DEBUG_INFO(priv, "init LQ command complete, clearing sta addition status for sta %d\n",
1197                                lq->sta_id);
1198                 spin_lock_irqsave(&priv->sta_lock, flags_spin);
1199                 priv->stations[lq->sta_id].used &= ~IWL_STA_UCODE_INPROGRESS;
1200                 spin_unlock_irqrestore(&priv->sta_lock, flags_spin);
1201         }
1202         return ret;
1203 }
1204 EXPORT_SYMBOL(iwl_send_lq_cmd);
1205
1206 /**
1207  * iwl_alloc_bcast_station - add broadcast station into driver's station table.
1208  *
1209  * This adds the broadcast station into the driver's station table
1210  * and marks it driver active, so that it will be restored to the
1211  * device at the next best time.
1212  */
1213 int iwl_alloc_bcast_station(struct iwl_priv *priv, bool init_lq)
1214 {
1215         struct iwl_link_quality_cmd *link_cmd;
1216         unsigned long flags;
1217         u8 sta_id;
1218
1219         spin_lock_irqsave(&priv->sta_lock, flags);
1220         sta_id = iwl_prep_station(priv, iwl_bcast_addr, false, NULL);
1221         if (sta_id == IWL_INVALID_STATION) {
1222                 IWL_ERR(priv, "Unable to prepare broadcast station\n");
1223                 spin_unlock_irqrestore(&priv->sta_lock, flags);
1224
1225                 return -EINVAL;
1226         }
1227
1228         priv->stations[sta_id].used |= IWL_STA_DRIVER_ACTIVE;
1229         priv->stations[sta_id].used |= IWL_STA_BCAST;
1230         spin_unlock_irqrestore(&priv->sta_lock, flags);
1231
1232         if (init_lq) {
1233                 link_cmd = iwl_sta_alloc_lq(priv, sta_id);
1234                 if (!link_cmd) {
1235                         IWL_ERR(priv,
1236                                 "Unable to initialize rate scaling for bcast station.\n");
1237                         return -ENOMEM;
1238                 }
1239
1240                 spin_lock_irqsave(&priv->sta_lock, flags);
1241                 priv->stations[sta_id].lq = link_cmd;
1242                 spin_unlock_irqrestore(&priv->sta_lock, flags);
1243         }
1244
1245         return 0;
1246 }
1247 EXPORT_SYMBOL_GPL(iwl_alloc_bcast_station);
1248
1249 void iwl_dealloc_bcast_station(struct iwl_priv *priv)
1250 {
1251         unsigned long flags;
1252         int i;
1253
1254         spin_lock_irqsave(&priv->sta_lock, flags);
1255         for (i = 0; i < priv->hw_params.max_stations; i++) {
1256                 if (!(priv->stations[i].used & IWL_STA_BCAST))
1257                         continue;
1258
1259                 priv->stations[i].used &= ~IWL_STA_UCODE_ACTIVE;
1260                 priv->num_stations--;
1261                 BUG_ON(priv->num_stations < 0);
1262                 kfree(priv->stations[i].lq);
1263                 priv->stations[i].lq = NULL;
1264         }
1265         spin_unlock_irqrestore(&priv->sta_lock, flags);
1266 }
1267 EXPORT_SYMBOL_GPL(iwl_dealloc_bcast_station);
1268
1269 /**
1270  * iwl_sta_tx_modify_enable_tid - Enable Tx for this TID in station table
1271  */
1272 void iwl_sta_tx_modify_enable_tid(struct iwl_priv *priv, int sta_id, int tid)
1273 {
1274         unsigned long flags;
1275
1276         /* Remove "disable" flag, to enable Tx for this TID */
1277         spin_lock_irqsave(&priv->sta_lock, flags);
1278         priv->stations[sta_id].sta.sta.modify_mask = STA_MODIFY_TID_DISABLE_TX;
1279         priv->stations[sta_id].sta.tid_disable_tx &= cpu_to_le16(~(1 << tid));
1280         priv->stations[sta_id].sta.mode = STA_CONTROL_MODIFY_MSK;
1281         spin_unlock_irqrestore(&priv->sta_lock, flags);
1282
1283         iwl_send_add_sta(priv, &priv->stations[sta_id].sta, CMD_ASYNC);
1284 }
1285 EXPORT_SYMBOL(iwl_sta_tx_modify_enable_tid);
1286
1287 int iwl_sta_rx_agg_start(struct iwl_priv *priv, struct ieee80211_sta *sta,
1288                          int tid, u16 ssn)
1289 {
1290         unsigned long flags;
1291         int sta_id;
1292
1293         sta_id = iwl_sta_id(sta);
1294         if (sta_id == IWL_INVALID_STATION)
1295                 return -ENXIO;
1296
1297         spin_lock_irqsave(&priv->sta_lock, flags);
1298         priv->stations[sta_id].sta.station_flags_msk = 0;
1299         priv->stations[sta_id].sta.sta.modify_mask = STA_MODIFY_ADDBA_TID_MSK;
1300         priv->stations[sta_id].sta.add_immediate_ba_tid = (u8)tid;
1301         priv->stations[sta_id].sta.add_immediate_ba_ssn = cpu_to_le16(ssn);
1302         priv->stations[sta_id].sta.mode = STA_CONTROL_MODIFY_MSK;
1303         spin_unlock_irqrestore(&priv->sta_lock, flags);
1304
1305         return iwl_send_add_sta(priv, &priv->stations[sta_id].sta,
1306                                 CMD_ASYNC);
1307 }
1308 EXPORT_SYMBOL(iwl_sta_rx_agg_start);
1309
1310 int iwl_sta_rx_agg_stop(struct iwl_priv *priv, struct ieee80211_sta *sta,
1311                         int tid)
1312 {
1313         unsigned long flags;
1314         int sta_id;
1315
1316         sta_id = iwl_sta_id(sta);
1317         if (sta_id == IWL_INVALID_STATION) {
1318                 IWL_ERR(priv, "Invalid station for AGG tid %d\n", tid);
1319                 return -ENXIO;
1320         }
1321
1322         spin_lock_irqsave(&priv->sta_lock, flags);
1323         priv->stations[sta_id].sta.station_flags_msk = 0;
1324         priv->stations[sta_id].sta.sta.modify_mask = STA_MODIFY_DELBA_TID_MSK;
1325         priv->stations[sta_id].sta.remove_immediate_ba_tid = (u8)tid;
1326         priv->stations[sta_id].sta.mode = STA_CONTROL_MODIFY_MSK;
1327         spin_unlock_irqrestore(&priv->sta_lock, flags);
1328
1329         return iwl_send_add_sta(priv, &priv->stations[sta_id].sta,
1330                                         CMD_ASYNC);
1331 }
1332 EXPORT_SYMBOL(iwl_sta_rx_agg_stop);
1333
1334 void iwl_sta_modify_ps_wake(struct iwl_priv *priv, int sta_id)
1335 {
1336         unsigned long flags;
1337
1338         spin_lock_irqsave(&priv->sta_lock, flags);
1339         priv->stations[sta_id].sta.station_flags &= ~STA_FLG_PWR_SAVE_MSK;
1340         priv->stations[sta_id].sta.station_flags_msk = STA_FLG_PWR_SAVE_MSK;
1341         priv->stations[sta_id].sta.sta.modify_mask = 0;
1342         priv->stations[sta_id].sta.sleep_tx_count = 0;
1343         priv->stations[sta_id].sta.mode = STA_CONTROL_MODIFY_MSK;
1344         spin_unlock_irqrestore(&priv->sta_lock, flags);
1345
1346         iwl_send_add_sta(priv, &priv->stations[sta_id].sta, CMD_ASYNC);
1347 }
1348 EXPORT_SYMBOL(iwl_sta_modify_ps_wake);
1349
1350 void iwl_sta_modify_sleep_tx_count(struct iwl_priv *priv, int sta_id, int cnt)
1351 {
1352         unsigned long flags;
1353
1354         spin_lock_irqsave(&priv->sta_lock, flags);
1355         priv->stations[sta_id].sta.station_flags |= STA_FLG_PWR_SAVE_MSK;
1356         priv->stations[sta_id].sta.station_flags_msk = STA_FLG_PWR_SAVE_MSK;
1357         priv->stations[sta_id].sta.sta.modify_mask =
1358                                         STA_MODIFY_SLEEP_TX_COUNT_MSK;
1359         priv->stations[sta_id].sta.sleep_tx_count = cpu_to_le16(cnt);
1360         priv->stations[sta_id].sta.mode = STA_CONTROL_MODIFY_MSK;
1361         spin_unlock_irqrestore(&priv->sta_lock, flags);
1362
1363         iwl_send_add_sta(priv, &priv->stations[sta_id].sta, CMD_ASYNC);
1364 }
1365 EXPORT_SYMBOL(iwl_sta_modify_sleep_tx_count);
1366
1367 int iwl_mac_sta_remove(struct ieee80211_hw *hw,
1368                        struct ieee80211_vif *vif,
1369                        struct ieee80211_sta *sta)
1370 {
1371         struct iwl_priv *priv = hw->priv;
1372         struct iwl_station_priv_common *sta_common = (void *)sta->drv_priv;
1373         int ret;
1374
1375         IWL_DEBUG_INFO(priv, "received request to remove station %pM\n",
1376                         sta->addr);
1377         ret = iwl_remove_station(priv, sta_common->sta_id, sta->addr);
1378         if (ret)
1379                 IWL_ERR(priv, "Error removing station %pM\n",
1380                         sta->addr);
1381         return ret;
1382 }
1383 EXPORT_SYMBOL(iwl_mac_sta_remove);