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 #include <linux/lockdep.h>
  34
  35 #include "iwl-dev.h"
  36 #include "iwl-core.h"
  37 #include "iwl-sta.h"
  38
  39 /* priv->sta_lock must be held */
  40 static void iwl_sta_ucode_activate(struct iwl_priv *priv, u8 sta_id)
  41 {
  42
  43         if (!(priv->stations[sta_id].used & IWL_STA_DRIVER_ACTIVE))
  44                 IWL_ERR(priv, "ACTIVATE a non DRIVER active station id %u addr %pM\n",
  45                         sta_id, priv->stations[sta_id].sta.sta.addr);
  46
  47         if (priv->stations[sta_id].used & IWL_STA_UCODE_ACTIVE) {
  48                 IWL_DEBUG_ASSOC(priv,
  49                                 "STA id %u addr %pM already present in uCode (according to driver)\n",
  50                                 sta_id, priv->stations[sta_id].sta.sta.addr);
  51         } else {
  52                 priv->stations[sta_id].used |= IWL_STA_UCODE_ACTIVE;
  53                 IWL_DEBUG_ASSOC(priv, "Added STA id %u addr %pM to uCode\n",
  54                                 sta_id, priv->stations[sta_id].sta.sta.addr);
  55         }
  56 }
  57
  58 static int iwl_process_add_sta_resp(struct iwl_priv *priv,
  59                                     struct iwl_addsta_cmd *addsta,
  60                                     struct iwl_rx_packet *pkt,
  61                                     bool sync)
  62 {
  63         u8 sta_id = addsta->sta.sta_id;
  64         unsigned long flags;
  65         int ret = -EIO;
  66
  67         if (pkt->hdr.flags & IWL_CMD_FAILED_MSK) {
  68                 IWL_ERR(priv, "Bad return from REPLY_ADD_STA (0x%08X)\n",
  69                         pkt->hdr.flags);
  70                 return ret;
  71         }
  72
  73         IWL_DEBUG_INFO(priv, "Processing response for adding station %u\n",
  74                        sta_id);
  75
  76         spin_lock_irqsave(&priv->sta_lock, flags);
  77
  78         switch (pkt->u.add_sta.status) {
  79         case ADD_STA_SUCCESS_MSK:
  80                 IWL_DEBUG_INFO(priv, "REPLY_ADD_STA PASSED\n");
  81                 iwl_sta_ucode_activate(priv, sta_id);
  82                 ret = 0;
  83                 break;
  84         case ADD_STA_NO_ROOM_IN_TABLE:
  85                 IWL_ERR(priv, "Adding station %d failed, no room in table.\n",
  86                         sta_id);
  87                 break;
  88         case ADD_STA_NO_BLOCK_ACK_RESOURCE:
  89                 IWL_ERR(priv, "Adding station %d failed, no block ack resource.\n",
  90                         sta_id);
  91                 break;
  92         case ADD_STA_MODIFY_NON_EXIST_STA:
  93                 IWL_ERR(priv, "Attempting to modify non-existing station %d\n",
  94                         sta_id);
  95                 break;
  96         default:
  97                 IWL_DEBUG_ASSOC(priv, "Received REPLY_ADD_STA:(0x%08X)\n",
  98                                 pkt->u.add_sta.status);
  99                 break;
 100         }
 101
 102         IWL_DEBUG_INFO(priv, "%s station id %u addr %pM\n",
 103                        priv->stations[sta_id].sta.mode ==
 104                        STA_CONTROL_MODIFY_MSK ?  "Modified" : "Added",
 105                        sta_id, priv->stations[sta_id].sta.sta.addr);
 106
 107         /*
 108          * XXX: The MAC address in the command buffer is often changed from
 109          * the original sent to the device. That is, the MAC address
 110          * written to the command buffer often is not the same MAC adress
 111          * read from the command buffer when the command returns. This
 112          * issue has not yet been resolved and this debugging is left to
 113          * observe the problem.
 114          */
 115         IWL_DEBUG_INFO(priv, "%s station according to cmd buffer %pM\n",
 116                        priv->stations[sta_id].sta.mode ==
 117                        STA_CONTROL_MODIFY_MSK ? "Modified" : "Added",
 118                        addsta->sta.addr);
 119         spin_unlock_irqrestore(&priv->sta_lock, flags);
 120
 121         return ret;
 122 }
 123
 124 static void iwl_add_sta_callback(struct iwl_priv *priv,
 125                                  struct iwl_device_cmd *cmd,
 126                                  struct iwl_rx_packet *pkt)
 127 {
 128         struct iwl_addsta_cmd *addsta =
 129                 (struct iwl_addsta_cmd *)cmd->cmd.payload;
 130
 131         iwl_process_add_sta_resp(priv, addsta, pkt, false);
 132
 133 }
 134
 135 int iwl_send_add_sta(struct iwl_priv *priv,
 136                      struct iwl_addsta_cmd *sta, u8 flags)
 137 {
 138         struct iwl_rx_packet *pkt = NULL;
 139         int ret = 0;
 140         u8 data[sizeof(*sta)];
 141         struct iwl_host_cmd cmd = {
 142                 .id = REPLY_ADD_STA,
 143                 .flags = flags,
 144                 .data = data,
 145         };
 146         u8 sta_id __maybe_unused = sta->sta.sta_id;
 147
 148         IWL_DEBUG_INFO(priv, "Adding sta %u (%pM) %ssynchronously\n",
 149                        sta_id, sta->sta.addr, flags & CMD_ASYNC ?  "a" : "");
 150
 151         if (flags & CMD_ASYNC)
 152                 cmd.callback = iwl_add_sta_callback;
 153         else {
 154                 cmd.flags |= CMD_WANT_SKB;
 155                 might_sleep();
 156         }
 157
 158         cmd.len = priv->cfg->ops->utils->build_addsta_hcmd(sta, data);
 159         ret = iwl_send_cmd(priv, &cmd);
 160
 161         if (ret || (flags & CMD_ASYNC))
 162                 return ret;
 163
 164         if (ret == 0) {
 165                 pkt = (struct iwl_rx_packet *)cmd.reply_page;
 166                 ret = iwl_process_add_sta_resp(priv, sta, pkt, true);
 167         }
 168         iwl_free_pages(priv, cmd.reply_page);
 169
 170         return ret;
 171 }
 172 EXPORT_SYMBOL(iwl_send_add_sta);
 173
 174 static void iwl_set_ht_add_station(struct iwl_priv *priv, u8 index,
 175                                    struct ieee80211_sta *sta,
 176                                    struct iwl_rxon_context *ctx)
 177 {
 178         struct ieee80211_sta_ht_cap *sta_ht_inf = &sta->ht_cap;
 179         __le32 sta_flags;
 180         u8 mimo_ps_mode;
 181
 182         if (!sta || !sta_ht_inf->ht_supported)
 183                 goto done;
 184
 185         mimo_ps_mode = (sta_ht_inf->cap & IEEE80211_HT_CAP_SM_PS) >> 2;
 186         IWL_DEBUG_ASSOC(priv, "spatial multiplexing power save mode: %s\n",
 187                         (mimo_ps_mode == WLAN_HT_CAP_SM_PS_STATIC) ?
 188                         "static" :
 189                         (mimo_ps_mode == WLAN_HT_CAP_SM_PS_DYNAMIC) ?
 190                         "dynamic" : "disabled");
 191
 192         sta_flags = priv->stations[index].sta.station_flags;
 193
 194         sta_flags &= ~(STA_FLG_RTS_MIMO_PROT_MSK | STA_FLG_MIMO_DIS_MSK);
 195
 196         switch (mimo_ps_mode) {
 197         case WLAN_HT_CAP_SM_PS_STATIC:
 198                 sta_flags |= STA_FLG_MIMO_DIS_MSK;
 199                 break;
 200         case WLAN_HT_CAP_SM_PS_DYNAMIC:
 201                 sta_flags |= STA_FLG_RTS_MIMO_PROT_MSK;
 202                 break;
 203         case WLAN_HT_CAP_SM_PS_DISABLED:
 204                 break;
 205         default:
 206                 IWL_WARN(priv, "Invalid MIMO PS mode %d\n", mimo_ps_mode);
 207                 break;
 208         }
 209
 210         sta_flags |= cpu_to_le32(
 211               (u32)sta_ht_inf->ampdu_factor << STA_FLG_MAX_AGG_SIZE_POS);
 212
 213         sta_flags |= cpu_to_le32(
 214               (u32)sta_ht_inf->ampdu_density << STA_FLG_AGG_MPDU_DENSITY_POS);
 215
 216         if (iwl_is_ht40_tx_allowed(priv, ctx, &sta->ht_cap))
 217                 sta_flags |= STA_FLG_HT40_EN_MSK;
 218         else
 219                 sta_flags &= ~STA_FLG_HT40_EN_MSK;
 220
 221         priv->stations[index].sta.station_flags = sta_flags;
 222  done:
 223         return;
 224 }
 225
 226 /**
 227  * iwl_prep_station - Prepare station information for addition
 228  *
 229  * should be called with sta_lock held
 230  */
 231 static u8 iwl_prep_station(struct iwl_priv *priv, struct iwl_rxon_context *ctx,
 232                            const u8 *addr, bool is_ap,
 233                            struct ieee80211_sta *sta)
 234 {
 235         struct iwl_station_entry *station;
 236         int i;
 237         u8 sta_id = IWL_INVALID_STATION;
 238         u16 rate;
 239
 240         if (is_ap)
 241                 sta_id = ctx->ap_sta_id;
 242         else if (is_broadcast_ether_addr(addr))
 243                 sta_id = ctx->bcast_sta_id;
 244         else
 245                 for (i = IWL_STA_ID; i < priv->hw_params.max_stations; i++) {
 246                         if (!compare_ether_addr(priv->stations[i].sta.sta.addr,
 247                                                 addr)) {
 248                                 sta_id = i;
 249                                 break;
 250                         }
 251
 252                         if (!priv->stations[i].used &&
 253                             sta_id == IWL_INVALID_STATION)
 254                                 sta_id = i;
 255                 }
 256
 257         /*
 258          * These two conditions have the same outcome, but keep them
 259          * separate
 260          */
 261         if (unlikely(sta_id == IWL_INVALID_STATION))
 262                 return sta_id;
 263
 264         /*
 265          * uCode is not able to deal with multiple requests to add a
 266          * station. Keep track if one is in progress so that we do not send
 267          * another.
 268          */
 269         if (priv->stations[sta_id].used & IWL_STA_UCODE_INPROGRESS) {
 270                 IWL_DEBUG_INFO(priv, "STA %d already in process of being added.\n",
 271                                 sta_id);
 272                 return sta_id;
 273         }
 274
 275         if ((priv->stations[sta_id].used & IWL_STA_DRIVER_ACTIVE) &&
 276             (priv->stations[sta_id].used & IWL_STA_UCODE_ACTIVE) &&
 277             !compare_ether_addr(priv->stations[sta_id].sta.sta.addr, addr)) {
 278                 IWL_DEBUG_ASSOC(priv, "STA %d (%pM) already added, not adding again.\n",
 279                                 sta_id, addr);
 280                 return sta_id;
 281         }
 282
 283         station = &priv->stations[sta_id];
 284         station->used = IWL_STA_DRIVER_ACTIVE;
 285         IWL_DEBUG_ASSOC(priv, "Add STA to driver ID %d: %pM\n",
 286                         sta_id, addr);
 287         priv->num_stations++;
 288
 289         /* Set up the REPLY_ADD_STA command to send to device */
 290         memset(&station->sta, 0, sizeof(struct iwl_addsta_cmd));
 291         memcpy(station->sta.sta.addr, addr, ETH_ALEN);
 292         station->sta.mode = 0;
 293         station->sta.sta.sta_id = sta_id;
 294         station->sta.station_flags = ctx->station_flags;
 295         station->ctxid = ctx->ctxid;
 296
 297         if (sta) {
 298                 struct iwl_station_priv_common *sta_priv;
 299
 300                 sta_priv = (void *)sta->drv_priv;
 301                 sta_priv->ctx = ctx;
 302         }
 303
 304         /*
 305          * OK to call unconditionally, since local stations (IBSS BSSID
 306          * STA and broadcast STA) pass in a NULL sta, and mac80211
 307          * doesn't allow HT IBSS.
 308          */
 309         iwl_set_ht_add_station(priv, sta_id, sta, ctx);
 310
 311         /* 3945 only */
 312         rate = (priv->band == IEEE80211_BAND_5GHZ) ?
 313                 IWL_RATE_6M_PLCP : IWL_RATE_1M_PLCP;
 314         /* Turn on both antennas for the station... */
 315         station->sta.rate_n_flags = cpu_to_le16(rate | RATE_MCS_ANT_AB_MSK);
 316
 317         return sta_id;
 318
 319 }
 320
 321 #define STA_WAIT_TIMEOUT (HZ/2)
 322
 323 /**
 324  * iwl_add_station_common -
 325  */
 326 int iwl_add_station_common(struct iwl_priv *priv, struct iwl_rxon_context *ctx,
 327                            const u8 *addr, bool is_ap,
 328                            struct ieee80211_sta *sta, u8 *sta_id_r)
 329 {
 330         unsigned long flags_spin;
 331         int ret = 0;
 332         u8 sta_id;
 333         struct iwl_addsta_cmd sta_cmd;
 334
 335         *sta_id_r = 0;
 336         spin_lock_irqsave(&priv->sta_lock, flags_spin);
 337         sta_id = iwl_prep_station(priv, ctx, addr, is_ap, sta);
 338         if (sta_id == IWL_INVALID_STATION) {
 339                 IWL_ERR(priv, "Unable to prepare station %pM for addition\n",
 340                         addr);
 341                 spin_unlock_irqrestore(&priv->sta_lock, flags_spin);
 342                 return -EINVAL;
 343         }
 344
 345         /*
 346          * uCode is not able to deal with multiple requests to add a
 347          * station. Keep track if one is in progress so that we do not send
 348          * another.
 349          */
 350         if (priv->stations[sta_id].used & IWL_STA_UCODE_INPROGRESS) {
 351                 IWL_DEBUG_INFO(priv, "STA %d already in process of being added.\n",
 352                                sta_id);
 353                 spin_unlock_irqrestore(&priv->sta_lock, flags_spin);
 354                 return -EEXIST;
 355         }
 356
 357         if ((priv->stations[sta_id].used & IWL_STA_DRIVER_ACTIVE) &&
 358             (priv->stations[sta_id].used & IWL_STA_UCODE_ACTIVE)) {
 359                 IWL_DEBUG_ASSOC(priv, "STA %d (%pM) already added, not adding again.\n",
 360                                 sta_id, addr);
 361                 spin_unlock_irqrestore(&priv->sta_lock, flags_spin);
 362                 return -EEXIST;
 363         }
 364
 365         priv->stations[sta_id].used |= IWL_STA_UCODE_INPROGRESS;
 366         memcpy(&sta_cmd, &priv->stations[sta_id].sta, sizeof(struct iwl_addsta_cmd));
 367         spin_unlock_irqrestore(&priv->sta_lock, flags_spin);
 368
 369         /* Add station to device's station table */
 370         ret = iwl_send_add_sta(priv, &sta_cmd, CMD_SYNC);
 371         if (ret) {
 372                 spin_lock_irqsave(&priv->sta_lock, flags_spin);
 373                 IWL_ERR(priv, "Adding station %pM failed.\n",
 374                         priv->stations[sta_id].sta.sta.addr);
 375                 priv->stations[sta_id].used &= ~IWL_STA_DRIVER_ACTIVE;
 376                 priv->stations[sta_id].used &= ~IWL_STA_UCODE_INPROGRESS;
 377                 spin_unlock_irqrestore(&priv->sta_lock, flags_spin);
 378         }
 379         *sta_id_r = sta_id;
 380         return ret;
 381 }
 382 EXPORT_SYMBOL(iwl_add_station_common);
 383
 384 static struct iwl_link_quality_cmd *iwl_sta_alloc_lq(struct iwl_priv *priv,
 385                                                      u8 sta_id)
 386 {
 387         int i, r;
 388         struct iwl_link_quality_cmd *link_cmd;
 389         u32 rate_flags = 0;
 390         __le32 rate_n_flags;
 391
 392         link_cmd = kzalloc(sizeof(struct iwl_link_quality_cmd), GFP_KERNEL);
 393         if (!link_cmd) {
 394                 IWL_ERR(priv, "Unable to allocate memory for LQ cmd.\n");
 395                 return NULL;
 396         }
 397         /* Set up the rate scaling to start at selected rate, fall back
 398          * all the way down to 1M in IEEE order, and then spin on 1M */
 399         if (priv->band == IEEE80211_BAND_5GHZ)
 400                 r = IWL_RATE_6M_INDEX;
 401         else
 402                 r = IWL_RATE_1M_INDEX;
 403
 404         if (r >= IWL_FIRST_CCK_RATE && r <= IWL_LAST_CCK_RATE)
 405                 rate_flags |= RATE_MCS_CCK_MSK;
 406
 407         rate_flags |= first_antenna(priv->hw_params.valid_tx_ant) <<
 408                                 RATE_MCS_ANT_POS;
 409         rate_n_flags = iwl_hw_set_rate_n_flags(iwl_rates[r].plcp, rate_flags);
 410         for (i = 0; i < LINK_QUAL_MAX_RETRY_NUM; i++)
 411                 link_cmd->rs_table[i].rate_n_flags = rate_n_flags;
 412
 413         link_cmd->general_params.single_stream_ant_msk =
 414                                 first_antenna(priv->hw_params.valid_tx_ant);
 415
 416         link_cmd->general_params.dual_stream_ant_msk =
 417                 priv->hw_params.valid_tx_ant &
 418                 ~first_antenna(priv->hw_params.valid_tx_ant);
 419         if (!link_cmd->general_params.dual_stream_ant_msk) {
 420                 link_cmd->general_params.dual_stream_ant_msk = ANT_AB;
 421         } else if (num_of_ant(priv->hw_params.valid_tx_ant) == 2) {
 422                 link_cmd->general_params.dual_stream_ant_msk =
 423                         priv->hw_params.valid_tx_ant;
 424         }
 425
 426         link_cmd->agg_params.agg_dis_start_th = LINK_QUAL_AGG_DISABLE_START_DEF;
 427         link_cmd->agg_params.agg_time_limit =
 428                 cpu_to_le16(LINK_QUAL_AGG_TIME_LIMIT_DEF);
 429
 430         link_cmd->sta_id = sta_id;
 431
 432         return link_cmd;
 433 }
 434
 435 /*
 436  * iwl_add_bssid_station - Add the special IBSS BSSID station
 437  *
 438  * Function sleeps.
 439  */
 440 int iwl_add_bssid_station(struct iwl_priv *priv, struct iwl_rxon_context *ctx,
 441                           const u8 *addr, bool init_rs, u8 *sta_id_r)
 442 {
 443         int ret;
 444         u8 sta_id;
 445         struct iwl_link_quality_cmd *link_cmd;
 446         unsigned long flags;
 447
 448         if (sta_id_r)
 449                 *sta_id_r = IWL_INVALID_STATION;
 450
 451         ret = iwl_add_station_common(priv, ctx, addr, 0, NULL, &sta_id);
 452         if (ret) {
 453                 IWL_ERR(priv, "Unable to add station %pM\n", addr);
 454                 return ret;
 455         }
 456
 457         if (sta_id_r)
 458                 *sta_id_r = sta_id;
 459
 460         spin_lock_irqsave(&priv->sta_lock, flags);
 461         priv->stations[sta_id].used |= IWL_STA_LOCAL;
 462         spin_unlock_irqrestore(&priv->sta_lock, flags);
 463
 464         if (init_rs) {
 465                 /* Set up default rate scaling table in device's station table */
 466                 link_cmd = iwl_sta_alloc_lq(priv, sta_id);
 467                 if (!link_cmd) {
 468                         IWL_ERR(priv, "Unable to initialize rate scaling for station %pM.\n",
 469                                 addr);
 470                         return -ENOMEM;
 471                 }
 472
 473                 ret = iwl_send_lq_cmd(priv, ctx, link_cmd, CMD_SYNC, true);
 474                 if (ret)
 475                         IWL_ERR(priv, "Link quality command failed (%d)\n", ret);
 476
 477                 spin_lock_irqsave(&priv->sta_lock, flags);
 478                 priv->stations[sta_id].lq = link_cmd;
 479                 spin_unlock_irqrestore(&priv->sta_lock, flags);
 480         }
 481
 482         return 0;
 483 }
 484 EXPORT_SYMBOL(iwl_add_bssid_station);
 485
 486 /**
 487  * iwl_sta_ucode_deactivate - deactivate ucode status for a station
 488  *
 489  * priv->sta_lock must be held
 490  */
 491 static void iwl_sta_ucode_deactivate(struct iwl_priv *priv, u8 sta_id)
 492 {
 493         /* Ucode must be active and driver must be non active */
 494         if ((priv->stations[sta_id].used &
 495              (IWL_STA_UCODE_ACTIVE | IWL_STA_DRIVER_ACTIVE)) != IWL_STA_UCODE_ACTIVE)
 496                 IWL_ERR(priv, "removed non active STA %u\n", sta_id);
 497
 498         priv->stations[sta_id].used &= ~IWL_STA_UCODE_ACTIVE;
 499
 500         memset(&priv->stations[sta_id], 0, sizeof(struct iwl_station_entry));
 501         IWL_DEBUG_ASSOC(priv, "Removed STA %u\n", sta_id);
 502 }
 503
 504 static int iwl_send_remove_station(struct iwl_priv *priv,
 505                                    const u8 *addr, int sta_id)
 506 {
 507         struct iwl_rx_packet *pkt;
 508         int ret;
 509
 510         unsigned long flags_spin;
 511         struct iwl_rem_sta_cmd rm_sta_cmd;
 512
 513         struct iwl_host_cmd cmd = {
 514                 .id = REPLY_REMOVE_STA,
 515                 .len = sizeof(struct iwl_rem_sta_cmd),
 516                 .flags = CMD_SYNC,
 517                 .data = &rm_sta_cmd,
 518         };
 519
 520         memset(&rm_sta_cmd, 0, sizeof(rm_sta_cmd));
 521         rm_sta_cmd.num_sta = 1;
 522         memcpy(&rm_sta_cmd.addr, addr, ETH_ALEN);
 523
 524         cmd.flags |= CMD_WANT_SKB;
 525
 526         ret = iwl_send_cmd(priv, &cmd);
 527
 528         if (ret)
 529                 return ret;
 530
 531         pkt = (struct iwl_rx_packet *)cmd.reply_page;
 532         if (pkt->hdr.flags & IWL_CMD_FAILED_MSK) {
 533                 IWL_ERR(priv, "Bad return from REPLY_REMOVE_STA (0x%08X)\n",
 534                           pkt->hdr.flags);
 535                 ret = -EIO;
 536         }
 537
 538         if (!ret) {
 539                 switch (pkt->u.rem_sta.status) {
 540                 case REM_STA_SUCCESS_MSK:
 541                         spin_lock_irqsave(&priv->sta_lock, flags_spin);
 542                         iwl_sta_ucode_deactivate(priv, sta_id);
 543                         spin_unlock_irqrestore(&priv->sta_lock, flags_spin);
 544                         IWL_DEBUG_ASSOC(priv, "REPLY_REMOVE_STA PASSED\n");
 545                         break;
 546                 default:
 547                         ret = -EIO;
 548                         IWL_ERR(priv, "REPLY_REMOVE_STA failed\n");
 549                         break;
 550                 }
 551         }
 552         iwl_free_pages(priv, cmd.reply_page);
 553
 554         return ret;
 555 }
 556
 557 /**
 558  * iwl_remove_station - Remove driver's knowledge of station.
 559  */
 560 int iwl_remove_station(struct iwl_priv *priv, const u8 sta_id,
 561                        const u8 *addr)
 562 {
 563         unsigned long flags;
 564
 565         if (!iwl_is_ready(priv)) {
 566                 IWL_DEBUG_INFO(priv,
 567                         "Unable to remove station %pM, device not ready.\n",
 568                         addr);
 569                 /*
 570                  * It is typical for stations to be removed when we are
 571                  * going down. Return success since device will be down
 572                  * soon anyway
 573                  */
 574                 return 0;
 575         }
 576
 577         IWL_DEBUG_ASSOC(priv, "Removing STA from driver:%d  %pM\n",
 578                         sta_id, addr);
 579
 580         if (WARN_ON(sta_id == IWL_INVALID_STATION))
 581                 return -EINVAL;
 582
 583         spin_lock_irqsave(&priv->sta_lock, flags);
 584
 585         if (!(priv->stations[sta_id].used & IWL_STA_DRIVER_ACTIVE)) {
 586                 IWL_DEBUG_INFO(priv, "Removing %pM but non DRIVER active\n",
 587                                 addr);
 588                 goto out_err;
 589         }
 590
 591         if (!(priv->stations[sta_id].used & IWL_STA_UCODE_ACTIVE)) {
 592                 IWL_DEBUG_INFO(priv, "Removing %pM but non UCODE active\n",
 593                                 addr);
 594                 goto out_err;
 595         }
 596
 597         if (priv->stations[sta_id].used & IWL_STA_LOCAL) {
 598                 kfree(priv->stations[sta_id].lq);
 599                 priv->stations[sta_id].lq = NULL;
 600         }
 601
 602         priv->stations[sta_id].used &= ~IWL_STA_DRIVER_ACTIVE;
 603
 604         priv->num_stations--;
 605
 606         BUG_ON(priv->num_stations < 0);
 607
 608         spin_unlock_irqrestore(&priv->sta_lock, flags);
 609
 610         return iwl_send_remove_station(priv, addr, sta_id);
 611 out_err:
 612         spin_unlock_irqrestore(&priv->sta_lock, flags);
 613         return -EINVAL;
 614 }
 615 EXPORT_SYMBOL_GPL(iwl_remove_station);
 616
 617 /**
 618  * iwl_clear_ucode_stations - clear ucode station table bits
 619  *
 620  * This function clears all the bits in the driver indicating
 621  * which stations are active in the ucode. Call when something
 622  * other than explicit station management would cause this in
 623  * the ucode, e.g. unassociated RXON.
 624  */
 625 void iwl_clear_ucode_stations(struct iwl_priv *priv,
 626                               struct iwl_rxon_context *ctx)
 627 {
 628         int i;
 629         unsigned long flags_spin;
 630         bool cleared = false;
 631
 632         IWL_DEBUG_INFO(priv, "Clearing ucode stations in driver\n");
 633
 634         spin_lock_irqsave(&priv->sta_lock, flags_spin);
 635         for (i = 0; i < priv->hw_params.max_stations; i++) {
 636                 if (ctx && ctx->ctxid != priv->stations[i].ctxid)
 637                         continue;
 638
 639                 if (priv->stations[i].used & IWL_STA_UCODE_ACTIVE) {
 640                         IWL_DEBUG_INFO(priv, "Clearing ucode active for station %d\n", i);
 641                         priv->stations[i].used &= ~IWL_STA_UCODE_ACTIVE;
 642                         cleared = true;
 643                 }
 644         }
 645         spin_unlock_irqrestore(&priv->sta_lock, flags_spin);
 646
 647         if (!cleared)
 648                 IWL_DEBUG_INFO(priv, "No active stations found to be cleared\n");
 649 }
 650 EXPORT_SYMBOL(iwl_clear_ucode_stations);
 651
 652 /**
 653  * iwl_restore_stations() - Restore driver known stations to device
 654  *
 655  * All stations considered active by driver, but not present in ucode, is
 656  * restored.
 657  *
 658  * Function sleeps.
 659  */
 660 void iwl_restore_stations(struct iwl_priv *priv, struct iwl_rxon_context *ctx)
 661 {
 662         struct iwl_addsta_cmd sta_cmd;
 663         struct iwl_link_quality_cmd lq;
 664         unsigned long flags_spin;
 665         int i;
 666         bool found = false;
 667         int ret;
 668         bool send_lq;
 669
 670         if (!iwl_is_ready(priv)) {
 671                 IWL_DEBUG_INFO(priv, "Not ready yet, not restoring any stations.\n");
 672                 return;
 673         }
 674
 675         IWL_DEBUG_ASSOC(priv, "Restoring all known stations ... start.\n");
 676         spin_lock_irqsave(&priv->sta_lock, flags_spin);
 677         for (i = 0; i < priv->hw_params.max_stations; i++) {
 678                 if (ctx->ctxid != priv->stations[i].ctxid)
 679                         continue;
 680                 if ((priv->stations[i].used & IWL_STA_DRIVER_ACTIVE) &&
 681                             !(priv->stations[i].used & IWL_STA_UCODE_ACTIVE)) {
 682                         IWL_DEBUG_ASSOC(priv, "Restoring sta %pM\n",
 683                                         priv->stations[i].sta.sta.addr);
 684                         priv->stations[i].sta.mode = 0;
 685                         priv->stations[i].used |= IWL_STA_UCODE_INPROGRESS;
 686                         found = true;
 687                 }
 688         }
 689
 690         for (i = 0; i < priv->hw_params.max_stations; i++) {
 691                 if ((priv->stations[i].used & IWL_STA_UCODE_INPROGRESS)) {
 692                         memcpy(&sta_cmd, &priv->stations[i].sta,
 693                                sizeof(struct iwl_addsta_cmd));
 694                         send_lq = false;
 695                         if (priv->stations[i].lq) {
 696                                 memcpy(&lq, priv->stations[i].lq,
 697                                        sizeof(struct iwl_link_quality_cmd));
 698                                 send_lq = true;
 699                         }
 700                         spin_unlock_irqrestore(&priv->sta_lock, flags_spin);
 701                         ret = iwl_send_add_sta(priv, &sta_cmd, CMD_SYNC);
 702                         if (ret) {
 703                                 spin_lock_irqsave(&priv->sta_lock, flags_spin);
 704                                 IWL_ERR(priv, "Adding station %pM failed.\n",
 705                                         priv->stations[i].sta.sta.addr);
 706                                 priv->stations[i].used &= ~IWL_STA_DRIVER_ACTIVE;
 707                                 priv->stations[i].used &= ~IWL_STA_UCODE_INPROGRESS;
 708                                 spin_unlock_irqrestore(&priv->sta_lock, flags_spin);
 709                         }
 710                         /*
 711                          * Rate scaling has already been initialized, send
 712                          * current LQ command
 713                          */
 714                         if (send_lq)
 715                                 iwl_send_lq_cmd(priv, ctx, &lq, CMD_SYNC, true);
 716                         spin_lock_irqsave(&priv->sta_lock, flags_spin);
 717                         priv->stations[i].used &= ~IWL_STA_UCODE_INPROGRESS;
 718                 }
 719         }
 720
 721         spin_unlock_irqrestore(&priv->sta_lock, flags_spin);
 722         if (!found)
 723                 IWL_DEBUG_INFO(priv, "Restoring all known stations .... no stations to be restored.\n");
 724         else
 725                 IWL_DEBUG_INFO(priv, "Restoring all known stations .... complete.\n");
 726 }
 727 EXPORT_SYMBOL(iwl_restore_stations);
 728
 729 int iwl_get_free_ucode_key_index(struct iwl_priv *priv)
 730 {
 731         int i;
 732
 733         for (i = 0; i < priv->sta_key_max_num; i++)
 734                 if (!test_and_set_bit(i, &priv->ucode_key_table))
 735                         return i;
 736
 737         return WEP_INVALID_OFFSET;
 738 }
 739 EXPORT_SYMBOL(iwl_get_free_ucode_key_index);
 740
 741 static int iwl_send_static_wepkey_cmd(struct iwl_priv *priv,
 742                                       struct iwl_rxon_context *ctx,
 743                                       bool send_if_empty)
 744 {
 745         int i, not_empty = 0;
 746         u8 buff[sizeof(struct iwl_wep_cmd) +
 747                 sizeof(struct iwl_wep_key) * WEP_KEYS_MAX];
 748         struct iwl_wep_cmd *wep_cmd = (struct iwl_wep_cmd *)buff;
 749         size_t cmd_size  = sizeof(struct iwl_wep_cmd);
 750         struct iwl_host_cmd cmd = {
 751                 .id = ctx->wep_key_cmd,
 752                 .data = wep_cmd,
 753                 .flags = CMD_SYNC,
 754         };
 755
 756         might_sleep();
 757
 758         memset(wep_cmd, 0, cmd_size +
 759                         (sizeof(struct iwl_wep_key) * WEP_KEYS_MAX));
 760
 761         for (i = 0; i < WEP_KEYS_MAX ; i++) {
 762                 wep_cmd->key[i].key_index = i;
 763                 if (ctx->wep_keys[i].key_size) {
 764                         wep_cmd->key[i].key_offset = i;
 765                         not_empty = 1;
 766                 } else {
 767                         wep_cmd->key[i].key_offset = WEP_INVALID_OFFSET;
 768                 }
 769
 770                 wep_cmd->key[i].key_size = ctx->wep_keys[i].key_size;
 771                 memcpy(&wep_cmd->key[i].key[3], ctx->wep_keys[i].key,
 772                                 ctx->wep_keys[i].key_size);
 773         }
 774
 775         wep_cmd->global_key_type = WEP_KEY_WEP_TYPE;
 776         wep_cmd->num_keys = WEP_KEYS_MAX;
 777
 778         cmd_size += sizeof(struct iwl_wep_key) * WEP_KEYS_MAX;
 779
 780         cmd.len = cmd_size;
 781
 782         if (not_empty || send_if_empty)
 783                 return iwl_send_cmd(priv, &cmd);
 784         else
 785                 return 0;
 786 }
 787
 788 int iwl_restore_default_wep_keys(struct iwl_priv *priv,
 789                                  struct iwl_rxon_context *ctx)
 790 {
 791         lockdep_assert_held(&priv->mutex);
 792
 793         return iwl_send_static_wepkey_cmd(priv, ctx, false);
 794 }
 795 EXPORT_SYMBOL(iwl_restore_default_wep_keys);
 796
 797 int iwl_remove_default_wep_key(struct iwl_priv *priv,
 798                                struct iwl_rxon_context *ctx,
 799                                struct ieee80211_key_conf *keyconf)
 800 {
 801         int ret;
 802
 803         lockdep_assert_held(&priv->mutex);
 804
 805         IWL_DEBUG_WEP(priv, "Removing default WEP key: idx=%d\n",
 806                       keyconf->keyidx);
 807
 808         memset(&ctx->wep_keys[keyconf->keyidx], 0, sizeof(ctx->wep_keys[0]));
 809         if (iwl_is_rfkill(priv)) {
 810                 IWL_DEBUG_WEP(priv, "Not sending REPLY_WEPKEY command due to RFKILL.\n");
 811                 /* but keys in device are clear anyway so return success */
 812                 return 0;
 813         }
 814         ret = iwl_send_static_wepkey_cmd(priv, ctx, 1);
 815         IWL_DEBUG_WEP(priv, "Remove default WEP key: idx=%d ret=%d\n",
 816                       keyconf->keyidx, ret);
 817
 818         return ret;
 819 }
 820 EXPORT_SYMBOL(iwl_remove_default_wep_key);
 821
 822 int iwl_set_default_wep_key(struct iwl_priv *priv,
 823                             struct iwl_rxon_context *ctx,
 824                             struct ieee80211_key_conf *keyconf)
 825 {
 826         int ret;
 827
 828         lockdep_assert_held(&priv->mutex);
 829
 830         if (keyconf->keylen != WEP_KEY_LEN_128 &&
 831             keyconf->keylen != WEP_KEY_LEN_64) {
 832                 IWL_DEBUG_WEP(priv, "Bad WEP key length %d\n", keyconf->keylen);
 833                 return -EINVAL;
 834         }
 835
 836         keyconf->flags &= ~IEEE80211_KEY_FLAG_GENERATE_IV;
 837         keyconf->hw_key_idx = HW_KEY_DEFAULT;
 838         priv->stations[ctx->ap_sta_id].keyinfo.cipher = keyconf->cipher;
 839
 840         ctx->wep_keys[keyconf->keyidx].key_size = keyconf->keylen;
 841         memcpy(&ctx->wep_keys[keyconf->keyidx].key, &keyconf->key,
 842                                                         keyconf->keylen);
 843
 844         ret = iwl_send_static_wepkey_cmd(priv, ctx, false);
 845         IWL_DEBUG_WEP(priv, "Set default WEP key: len=%d idx=%d ret=%d\n",
 846                 keyconf->keylen, keyconf->keyidx, ret);
 847
 848         return ret;
 849 }
 850 EXPORT_SYMBOL(iwl_set_default_wep_key);
 851
 852 static int iwl_set_wep_dynamic_key_info(struct iwl_priv *priv,
 853                                         struct iwl_rxon_context *ctx,
 854                                         struct ieee80211_key_conf *keyconf,
 855                                         u8 sta_id)
 856 {
 857         unsigned long flags;
 858         __le16 key_flags = 0;
 859         struct iwl_addsta_cmd sta_cmd;
 860
 861         lockdep_assert_held(&priv->mutex);
 862
 863         keyconf->flags &= ~IEEE80211_KEY_FLAG_GENERATE_IV;
 864
 865         key_flags |= (STA_KEY_FLG_WEP | STA_KEY_FLG_MAP_KEY_MSK);
 866         key_flags |= cpu_to_le16(keyconf->keyidx << STA_KEY_FLG_KEYID_POS);
 867         key_flags &= ~STA_KEY_FLG_INVALID;
 868
 869         if (keyconf->keylen == WEP_KEY_LEN_128)
 870                 key_flags |= STA_KEY_FLG_KEY_SIZE_MSK;
 871
 872         if (sta_id == ctx->bcast_sta_id)
 873                 key_flags |= STA_KEY_MULTICAST_MSK;
 874
 875         spin_lock_irqsave(&priv->sta_lock, flags);
 876
 877         priv->stations[sta_id].keyinfo.cipher = keyconf->cipher;
 878         priv->stations[sta_id].keyinfo.keylen = keyconf->keylen;
 879         priv->stations[sta_id].keyinfo.keyidx = keyconf->keyidx;
 880
 881         memcpy(priv->stations[sta_id].keyinfo.key,
 882                                 keyconf->key, keyconf->keylen);
 883
 884         memcpy(&priv->stations[sta_id].sta.key.key[3],
 885                                 keyconf->key, keyconf->keylen);
 886
 887         if ((priv->stations[sta_id].sta.key.key_flags & STA_KEY_FLG_ENCRYPT_MSK)
 888                         == STA_KEY_FLG_NO_ENC)
 889                 priv->stations[sta_id].sta.key.key_offset =
 890                                  iwl_get_free_ucode_key_index(priv);
 891         /* else, we are overriding an existing key => no need to allocated room
 892          * in uCode. */
 893
 894         WARN(priv->stations[sta_id].sta.key.key_offset == WEP_INVALID_OFFSET,
 895                 "no space for a new key");
 896
 897         priv->stations[sta_id].sta.key.key_flags = key_flags;
 898         priv->stations[sta_id].sta.sta.modify_mask = STA_MODIFY_KEY_MASK;
 899         priv->stations[sta_id].sta.mode = STA_CONTROL_MODIFY_MSK;
 900
 901         memcpy(&sta_cmd, &priv->stations[sta_id].sta, sizeof(struct iwl_addsta_cmd));
 902         spin_unlock_irqrestore(&priv->sta_lock, flags);
 903
 904         return iwl_send_add_sta(priv, &sta_cmd, CMD_SYNC);
 905 }
 906
 907 static int iwl_set_ccmp_dynamic_key_info(struct iwl_priv *priv,
 908                                          struct iwl_rxon_context *ctx,
 909                                          struct ieee80211_key_conf *keyconf,
 910                                          u8 sta_id)
 911 {
 912         unsigned long flags;
 913         __le16 key_flags = 0;
 914         struct iwl_addsta_cmd sta_cmd;
 915
 916         lockdep_assert_held(&priv->mutex);
 917
 918         key_flags |= (STA_KEY_FLG_CCMP | STA_KEY_FLG_MAP_KEY_MSK);
 919         key_flags |= cpu_to_le16(keyconf->keyidx << STA_KEY_FLG_KEYID_POS);
 920         key_flags &= ~STA_KEY_FLG_INVALID;
 921
 922         if (sta_id == ctx->bcast_sta_id)
 923                 key_flags |= STA_KEY_MULTICAST_MSK;
 924
 925         keyconf->flags |= IEEE80211_KEY_FLAG_GENERATE_IV;
 926
 927         spin_lock_irqsave(&priv->sta_lock, flags);
 928         priv->stations[sta_id].keyinfo.cipher = keyconf->cipher;
 929         priv->stations[sta_id].keyinfo.keylen = keyconf->keylen;
 930
 931         memcpy(priv->stations[sta_id].keyinfo.key, keyconf->key,
 932                keyconf->keylen);
 933
 934         memcpy(priv->stations[sta_id].sta.key.key, keyconf->key,
 935                keyconf->keylen);
 936
 937         if ((priv->stations[sta_id].sta.key.key_flags & STA_KEY_FLG_ENCRYPT_MSK)
 938                         == STA_KEY_FLG_NO_ENC)
 939                 priv->stations[sta_id].sta.key.key_offset =
 940                                  iwl_get_free_ucode_key_index(priv);
 941         /* else, we are overriding an existing key => no need to allocated room
 942          * in uCode. */
 943
 944         WARN(priv->stations[sta_id].sta.key.key_offset == WEP_INVALID_OFFSET,
 945                 "no space for a new key");
 946
 947         priv->stations[sta_id].sta.key.key_flags = key_flags;
 948         priv->stations[sta_id].sta.sta.modify_mask = STA_MODIFY_KEY_MASK;
 949         priv->stations[sta_id].sta.mode = STA_CONTROL_MODIFY_MSK;
 950
 951         memcpy(&sta_cmd, &priv->stations[sta_id].sta, sizeof(struct iwl_addsta_cmd));
 952         spin_unlock_irqrestore(&priv->sta_lock, flags);
 953
 954         return iwl_send_add_sta(priv, &sta_cmd, CMD_SYNC);
 955 }
 956
 957 static int iwl_set_tkip_dynamic_key_info(struct iwl_priv *priv,
 958                                          struct iwl_rxon_context *ctx,
 959                                          struct ieee80211_key_conf *keyconf,
 960                                          u8 sta_id)
 961 {
 962         unsigned long flags;
 963         int ret = 0;
 964         __le16 key_flags = 0;
 965
 966         key_flags |= (STA_KEY_FLG_TKIP | STA_KEY_FLG_MAP_KEY_MSK);
 967         key_flags |= cpu_to_le16(keyconf->keyidx << STA_KEY_FLG_KEYID_POS);
 968         key_flags &= ~STA_KEY_FLG_INVALID;
 969
 970         if (sta_id == ctx->bcast_sta_id)
 971                 key_flags |= STA_KEY_MULTICAST_MSK;
 972
 973         keyconf->flags |= IEEE80211_KEY_FLAG_GENERATE_IV;
 974         keyconf->flags |= IEEE80211_KEY_FLAG_GENERATE_MMIC;
 975
 976         spin_lock_irqsave(&priv->sta_lock, flags);
 977
 978         priv->stations[sta_id].keyinfo.cipher = keyconf->cipher;
 979         priv->stations[sta_id].keyinfo.keylen = 16;
 980
 981         if ((priv->stations[sta_id].sta.key.key_flags & STA_KEY_FLG_ENCRYPT_MSK)
 982                         == STA_KEY_FLG_NO_ENC)
 983                 priv->stations[sta_id].sta.key.key_offset =
 984                                  iwl_get_free_ucode_key_index(priv);
 985         /* else, we are overriding an existing key => no need to allocated room
 986          * in uCode. */
 987
 988         WARN(priv->stations[sta_id].sta.key.key_offset == WEP_INVALID_OFFSET,
 989                 "no space for a new key");
 990
 991         priv->stations[sta_id].sta.key.key_flags = key_flags;
 992
 993
 994         /* This copy is acutally not needed: we get the key with each TX */
 995         memcpy(priv->stations[sta_id].keyinfo.key, keyconf->key, 16);
 996
 997         memcpy(priv->stations[sta_id].sta.key.key, keyconf->key, 16);
 998
 999         spin_unlock_irqrestore(&priv->sta_lock, flags);
1000
1001         return ret;
1002 }
1003
1004 void iwl_update_tkip_key(struct iwl_priv *priv,
1005                          struct iwl_rxon_context *ctx,
1006                          struct ieee80211_key_conf *keyconf,
1007                          struct ieee80211_sta *sta, u32 iv32, u16 *phase1key)
1008 {
1009         u8 sta_id;
1010         unsigned long flags;
1011         int i;
1012
1013         if (iwl_scan_cancel(priv)) {
1014                 /* cancel scan failed, just live w/ bad key and rely
1015                    briefly on SW decryption */
1016                 return;
1017         }
1018
1019         sta_id = iwl_sta_id_or_broadcast(priv, ctx, sta);
1020         if (sta_id == IWL_INVALID_STATION)
1021                 return;
1022
1023         spin_lock_irqsave(&priv->sta_lock, flags);
1024
1025         priv->stations[sta_id].sta.key.tkip_rx_tsc_byte2 = (u8) iv32;
1026
1027         for (i = 0; i < 5; i++)
1028                 priv->stations[sta_id].sta.key.tkip_rx_ttak[i] =
1029                         cpu_to_le16(phase1key[i]);
1030
1031         priv->stations[sta_id].sta.sta.modify_mask = STA_MODIFY_KEY_MASK;
1032         priv->stations[sta_id].sta.mode = STA_CONTROL_MODIFY_MSK;
1033
1034         iwl_send_add_sta(priv, &priv->stations[sta_id].sta, CMD_ASYNC);
1035
1036         spin_unlock_irqrestore(&priv->sta_lock, flags);
1037
1038 }
1039 EXPORT_SYMBOL(iwl_update_tkip_key);
1040
1041 int iwl_remove_dynamic_key(struct iwl_priv *priv,
1042                            struct iwl_rxon_context *ctx,
1043                            struct ieee80211_key_conf *keyconf,
1044                            u8 sta_id)
1045 {
1046         unsigned long flags;
1047         u16 key_flags;
1048         u8 keyidx;
1049         struct iwl_addsta_cmd sta_cmd;
1050
1051         lockdep_assert_held(&priv->mutex);
1052
1053         ctx->key_mapping_keys--;
1054
1055         spin_lock_irqsave(&priv->sta_lock, flags);
1056         key_flags = le16_to_cpu(priv->stations[sta_id].sta.key.key_flags);
1057         keyidx = (key_flags >> STA_KEY_FLG_KEYID_POS) & 0x3;
1058
1059         IWL_DEBUG_WEP(priv, "Remove dynamic key: idx=%d sta=%d\n",
1060                       keyconf->keyidx, sta_id);
1061
1062         if (keyconf->keyidx != keyidx) {
1063                 /* We need to remove a key with index different that the one
1064                  * in the uCode. This means that the key we need to remove has
1065                  * been replaced by another one with different index.
1066                  * Don't do anything and return ok
1067                  */
1068                 spin_unlock_irqrestore(&priv->sta_lock, flags);
1069                 return 0;
1070         }
1071
1072         if (priv->stations[sta_id].sta.key.key_offset == WEP_INVALID_OFFSET) {
1073                 IWL_WARN(priv, "Removing wrong key %d 0x%x\n",
1074                             keyconf->keyidx, key_flags);
1075                 spin_unlock_irqrestore(&priv->sta_lock, flags);
1076                 return 0;
1077         }
1078
1079         if (!test_and_clear_bit(priv->stations[sta_id].sta.key.key_offset,
1080                 &priv->ucode_key_table))
1081                 IWL_ERR(priv, "index %d not used in uCode key table.\n",
1082                         priv->stations[sta_id].sta.key.key_offset);
1083         memset(&priv->stations[sta_id].keyinfo, 0,
1084                                         sizeof(struct iwl_hw_key));
1085         memset(&priv->stations[sta_id].sta.key, 0,
1086                                         sizeof(struct iwl4965_keyinfo));
1087         priv->stations[sta_id].sta.key.key_flags =
1088                         STA_KEY_FLG_NO_ENC | STA_KEY_FLG_INVALID;
1089         priv->stations[sta_id].sta.key.key_offset = WEP_INVALID_OFFSET;
1090         priv->stations[sta_id].sta.sta.modify_mask = STA_MODIFY_KEY_MASK;
1091         priv->stations[sta_id].sta.mode = STA_CONTROL_MODIFY_MSK;
1092
1093         if (iwl_is_rfkill(priv)) {
1094                 IWL_DEBUG_WEP(priv, "Not sending REPLY_ADD_STA command because RFKILL enabled.\n");
1095                 spin_unlock_irqrestore(&priv->sta_lock, flags);
1096                 return 0;
1097         }
1098         memcpy(&sta_cmd, &priv->stations[sta_id].sta, sizeof(struct iwl_addsta_cmd));
1099         spin_unlock_irqrestore(&priv->sta_lock, flags);
1100
1101         return iwl_send_add_sta(priv, &sta_cmd, CMD_SYNC);
1102 }
1103 EXPORT_SYMBOL(iwl_remove_dynamic_key);
1104
1105 int iwl_set_dynamic_key(struct iwl_priv *priv, struct iwl_rxon_context *ctx,
1106                         struct ieee80211_key_conf *keyconf, u8 sta_id)
1107 {
1108         int ret;
1109
1110         lockdep_assert_held(&priv->mutex);
1111
1112         ctx->key_mapping_keys++;
1113         keyconf->hw_key_idx = HW_KEY_DYNAMIC;
1114
1115         switch (keyconf->cipher) {
1116         case WLAN_CIPHER_SUITE_CCMP:
1117                 ret = iwl_set_ccmp_dynamic_key_info(priv, ctx, keyconf, sta_id);
1118                 break;
1119         case WLAN_CIPHER_SUITE_TKIP:
1120                 ret = iwl_set_tkip_dynamic_key_info(priv, ctx, keyconf, sta_id);
1121                 break;
1122         case WLAN_CIPHER_SUITE_WEP40:
1123         case WLAN_CIPHER_SUITE_WEP104:
1124                 ret = iwl_set_wep_dynamic_key_info(priv, ctx, keyconf, sta_id);
1125                 break;
1126         default:
1127                 IWL_ERR(priv,
1128                         "Unknown alg: %s cipher = %x\n", __func__,
1129                         keyconf->cipher);
1130                 ret = -EINVAL;
1131         }
1132
1133         IWL_DEBUG_WEP(priv, "Set dynamic key: cipher=%x len=%d idx=%d sta=%d ret=%d\n",
1134                       keyconf->cipher, keyconf->keylen, keyconf->keyidx,
1135                       sta_id, ret);
1136
1137         return ret;
1138 }
1139 EXPORT_SYMBOL(iwl_set_dynamic_key);
1140
1141 #ifdef CONFIG_IWLWIFI_DEBUG
1142 static void iwl_dump_lq_cmd(struct iwl_priv *priv,
1143                            struct iwl_link_quality_cmd *lq)
1144 {
1145         int i;
1146         IWL_DEBUG_RATE(priv, "lq station id 0x%x\n", lq->sta_id);
1147         IWL_DEBUG_RATE(priv, "lq ant 0x%X 0x%X\n",
1148                        lq->general_params.single_stream_ant_msk,
1149                        lq->general_params.dual_stream_ant_msk);
1150
1151         for (i = 0; i < LINK_QUAL_MAX_RETRY_NUM; i++)
1152                 IWL_DEBUG_RATE(priv, "lq index %d 0x%X\n",
1153                                i, lq->rs_table[i].rate_n_flags);
1154 }
1155 #else
1156 static inline void iwl_dump_lq_cmd(struct iwl_priv *priv,
1157                                    struct iwl_link_quality_cmd *lq)
1158 {
1159 }
1160 #endif
1161
1162 /**
1163  * is_lq_table_valid() - Test one aspect of LQ cmd for validity
1164  *
1165  * It sometimes happens when a HT rate has been in use and we
1166  * loose connectivity with AP then mac80211 will first tell us that the
1167  * current channel is not HT anymore before removing the station. In such a
1168  * scenario the RXON flags will be updated to indicate we are not
1169  * communicating HT anymore, but the LQ command may still contain HT rates.
1170  * Test for this to prevent driver from sending LQ command between the time
1171  * RXON flags are updated and when LQ command is updated.
1172  */
1173 static bool is_lq_table_valid(struct iwl_priv *priv,
1174                               struct iwl_rxon_context *ctx,
1175                               struct iwl_link_quality_cmd *lq)
1176 {
1177         int i;
1178
1179         if (ctx->ht.enabled)
1180                 return true;
1181
1182         IWL_DEBUG_INFO(priv, "Channel %u is not an HT channel\n",
1183                        ctx->active.channel);
1184         for (i = 0; i < LINK_QUAL_MAX_RETRY_NUM; i++) {
1185                 if (le32_to_cpu(lq->rs_table[i].rate_n_flags) & RATE_MCS_HT_MSK) {
1186                         IWL_DEBUG_INFO(priv,
1187                                        "index %d of LQ expects HT channel\n",
1188                                        i);
1189                         return false;
1190                 }
1191         }
1192         return true;
1193 }
1194
1195 /**
1196  * iwl_send_lq_cmd() - Send link quality command
1197  * @init: This command is sent as part of station initialization right
1198  *        after station has been added.
1199  *
1200  * The link quality command is sent as the last step of station creation.
1201  * This is the special case in which init is set and we call a callback in
1202  * this case to clear the state indicating that station creation is in
1203  * progress.
1204  */
1205 int iwl_send_lq_cmd(struct iwl_priv *priv, struct iwl_rxon_context *ctx,
1206                     struct iwl_link_quality_cmd *lq, u8 flags, bool init)
1207 {
1208         int ret = 0;
1209         unsigned long flags_spin;
1210
1211         struct iwl_host_cmd cmd = {
1212                 .id = REPLY_TX_LINK_QUALITY_CMD,
1213                 .len = sizeof(struct iwl_link_quality_cmd),
1214                 .flags = flags,
1215                 .data = lq,
1216         };
1217
1218         if (WARN_ON(lq->sta_id == IWL_INVALID_STATION))
1219                 return -EINVAL;
1220
1221         iwl_dump_lq_cmd(priv, lq);
1222         BUG_ON(init && (cmd.flags & CMD_ASYNC));
1223
1224         if (is_lq_table_valid(priv, ctx, lq))
1225                 ret = iwl_send_cmd(priv, &cmd);
1226         else
1227                 ret = -EINVAL;
1228
1229         if (cmd.flags & CMD_ASYNC)
1230                 return ret;
1231
1232         if (init) {
1233                 IWL_DEBUG_INFO(priv, "init LQ command complete, clearing sta addition status for sta %d\n",
1234                                lq->sta_id);
1235                 spin_lock_irqsave(&priv->sta_lock, flags_spin);
1236                 priv->stations[lq->sta_id].used &= ~IWL_STA_UCODE_INPROGRESS;
1237                 spin_unlock_irqrestore(&priv->sta_lock, flags_spin);
1238         }
1239         return ret;
1240 }
1241 EXPORT_SYMBOL(iwl_send_lq_cmd);
1242
1243 /**
1244  * iwl_alloc_bcast_station - add broadcast station into driver's station table.
1245  *
1246  * This adds the broadcast station into the driver's station table
1247  * and marks it driver active, so that it will be restored to the
1248  * device at the next best time.
1249  */
1250 int iwl_alloc_bcast_station(struct iwl_priv *priv, struct iwl_rxon_context *ctx,
1251                             bool init_lq)
1252 {
1253         struct iwl_link_quality_cmd *link_cmd;
1254         unsigned long flags;
1255         u8 sta_id;
1256
1257         spin_lock_irqsave(&priv->sta_lock, flags);
1258         sta_id = iwl_prep_station(priv, ctx, iwl_bcast_addr, false, NULL);
1259         if (sta_id == IWL_INVALID_STATION) {
1260                 IWL_ERR(priv, "Unable to prepare broadcast station\n");
1261                 spin_unlock_irqrestore(&priv->sta_lock, flags);
1262
1263                 return -EINVAL;
1264         }
1265
1266         priv->stations[sta_id].used |= IWL_STA_DRIVER_ACTIVE;
1267         priv->stations[sta_id].used |= IWL_STA_BCAST;
1268         spin_unlock_irqrestore(&priv->sta_lock, flags);
1269
1270         if (init_lq) {
1271                 link_cmd = iwl_sta_alloc_lq(priv, sta_id);
1272                 if (!link_cmd) {
1273                         IWL_ERR(priv,
1274                                 "Unable to initialize rate scaling for bcast station.\n");
1275                         return -ENOMEM;
1276                 }
1277
1278                 spin_lock_irqsave(&priv->sta_lock, flags);
1279                 priv->stations[sta_id].lq = link_cmd;
1280                 spin_unlock_irqrestore(&priv->sta_lock, flags);
1281         }
1282
1283         return 0;
1284 }
1285 EXPORT_SYMBOL_GPL(iwl_alloc_bcast_station);
1286
1287 /**
1288  * iwl_update_bcast_station - update broadcast station's LQ command
1289  *
1290  * Only used by iwlagn. Placed here to have all bcast station management
1291  * code together.
1292  */
1293 static int iwl_update_bcast_station(struct iwl_priv *priv,
1294                                     struct iwl_rxon_context *ctx)
1295 {
1296         unsigned long flags;
1297         struct iwl_link_quality_cmd *link_cmd;
1298         u8 sta_id = ctx->bcast_sta_id;
1299
1300         link_cmd = iwl_sta_alloc_lq(priv, sta_id);
1301         if (!link_cmd) {
1302                 IWL_ERR(priv, "Unable to initialize rate scaling for bcast station.\n");
1303                 return -ENOMEM;
1304         }
1305
1306         spin_lock_irqsave(&priv->sta_lock, flags);
1307         if (priv->stations[sta_id].lq)
1308                 kfree(priv->stations[sta_id].lq);
1309         else
1310                 IWL_DEBUG_INFO(priv, "Bcast station rate scaling has not been initialized yet.\n");
1311         priv->stations[sta_id].lq = link_cmd;
1312         spin_unlock_irqrestore(&priv->sta_lock, flags);
1313
1314         return 0;
1315 }
1316
1317 int iwl_update_bcast_stations(struct iwl_priv *priv)
1318 {
1319         struct iwl_rxon_context *ctx;
1320         int ret = 0;
1321
1322         for_each_context(priv, ctx) {
1323                 ret = iwl_update_bcast_station(priv, ctx);
1324                 if (ret)
1325                         break;
1326         }
1327
1328         return ret;
1329 }
1330 EXPORT_SYMBOL_GPL(iwl_update_bcast_stations);
1331
1332 void iwl_dealloc_bcast_stations(struct iwl_priv *priv)
1333 {
1334         unsigned long flags;
1335         int i;
1336
1337         spin_lock_irqsave(&priv->sta_lock, flags);
1338         for (i = 0; i < priv->hw_params.max_stations; i++) {
1339                 if (!(priv->stations[i].used & IWL_STA_BCAST))
1340                         continue;
1341
1342                 priv->stations[i].used &= ~IWL_STA_UCODE_ACTIVE;
1343                 priv->num_stations--;
1344                 BUG_ON(priv->num_stations < 0);
1345                 kfree(priv->stations[i].lq);
1346                 priv->stations[i].lq = NULL;
1347         }
1348         spin_unlock_irqrestore(&priv->sta_lock, flags);
1349 }
1350 EXPORT_SYMBOL_GPL(iwl_dealloc_bcast_stations);
1351
1352 /**
1353  * iwl_sta_tx_modify_enable_tid - Enable Tx for this TID in station table
1354  */
1355 int iwl_sta_tx_modify_enable_tid(struct iwl_priv *priv, int sta_id, int tid)
1356 {
1357         unsigned long flags;
1358         struct iwl_addsta_cmd sta_cmd;
1359
1360         lockdep_assert_held(&priv->mutex);
1361
1362         /* Remove "disable" flag, to enable Tx for this TID */
1363         spin_lock_irqsave(&priv->sta_lock, flags);
1364         priv->stations[sta_id].sta.sta.modify_mask = STA_MODIFY_TID_DISABLE_TX;
1365         priv->stations[sta_id].sta.tid_disable_tx &= cpu_to_le16(~(1 << tid));
1366         priv->stations[sta_id].sta.mode = STA_CONTROL_MODIFY_MSK;
1367         memcpy(&sta_cmd, &priv->stations[sta_id].sta, sizeof(struct iwl_addsta_cmd));
1368         spin_unlock_irqrestore(&priv->sta_lock, flags);
1369
1370         return iwl_send_add_sta(priv, &sta_cmd, CMD_SYNC);
1371 }
1372 EXPORT_SYMBOL(iwl_sta_tx_modify_enable_tid);
1373
1374 int iwl_sta_rx_agg_start(struct iwl_priv *priv, struct ieee80211_sta *sta,
1375                          int tid, u16 ssn)
1376 {
1377         unsigned long flags;
1378         int sta_id;
1379         struct iwl_addsta_cmd sta_cmd;
1380
1381         lockdep_assert_held(&priv->mutex);
1382
1383         sta_id = iwl_sta_id(sta);
1384         if (sta_id == IWL_INVALID_STATION)
1385                 return -ENXIO;
1386
1387         spin_lock_irqsave(&priv->sta_lock, flags);
1388         priv->stations[sta_id].sta.station_flags_msk = 0;
1389         priv->stations[sta_id].sta.sta.modify_mask = STA_MODIFY_ADDBA_TID_MSK;
1390         priv->stations[sta_id].sta.add_immediate_ba_tid = (u8)tid;
1391         priv->stations[sta_id].sta.add_immediate_ba_ssn = cpu_to_le16(ssn);
1392         priv->stations[sta_id].sta.mode = STA_CONTROL_MODIFY_MSK;
1393         memcpy(&sta_cmd, &priv->stations[sta_id].sta, sizeof(struct iwl_addsta_cmd));
1394         spin_unlock_irqrestore(&priv->sta_lock, flags);
1395
1396         return iwl_send_add_sta(priv, &sta_cmd, CMD_SYNC);
1397 }
1398 EXPORT_SYMBOL(iwl_sta_rx_agg_start);
1399
1400 int iwl_sta_rx_agg_stop(struct iwl_priv *priv, struct ieee80211_sta *sta,
1401                         int tid)
1402 {
1403         unsigned long flags;
1404         int sta_id;
1405         struct iwl_addsta_cmd sta_cmd;
1406
1407         lockdep_assert_held(&priv->mutex);
1408
1409         sta_id = iwl_sta_id(sta);
1410         if (sta_id == IWL_INVALID_STATION) {
1411                 IWL_ERR(priv, "Invalid station for AGG tid %d\n", tid);
1412                 return -ENXIO;
1413         }
1414
1415         spin_lock_irqsave(&priv->sta_lock, flags);
1416         priv->stations[sta_id].sta.station_flags_msk = 0;
1417         priv->stations[sta_id].sta.sta.modify_mask = STA_MODIFY_DELBA_TID_MSK;
1418         priv->stations[sta_id].sta.remove_immediate_ba_tid = (u8)tid;
1419         priv->stations[sta_id].sta.mode = STA_CONTROL_MODIFY_MSK;
1420         memcpy(&sta_cmd, &priv->stations[sta_id].sta, sizeof(struct iwl_addsta_cmd));
1421         spin_unlock_irqrestore(&priv->sta_lock, flags);
1422
1423         return iwl_send_add_sta(priv, &sta_cmd, CMD_SYNC);
1424 }
1425 EXPORT_SYMBOL(iwl_sta_rx_agg_stop);
1426
1427 void iwl_sta_modify_ps_wake(struct iwl_priv *priv, int sta_id)
1428 {
1429         unsigned long flags;
1430
1431         spin_lock_irqsave(&priv->sta_lock, flags);
1432         priv->stations[sta_id].sta.station_flags &= ~STA_FLG_PWR_SAVE_MSK;
1433         priv->stations[sta_id].sta.station_flags_msk = STA_FLG_PWR_SAVE_MSK;
1434         priv->stations[sta_id].sta.sta.modify_mask = 0;
1435         priv->stations[sta_id].sta.sleep_tx_count = 0;
1436         priv->stations[sta_id].sta.mode = STA_CONTROL_MODIFY_MSK;
1437         iwl_send_add_sta(priv, &priv->stations[sta_id].sta, CMD_ASYNC);
1438         spin_unlock_irqrestore(&priv->sta_lock, flags);
1439
1440 }
1441 EXPORT_SYMBOL(iwl_sta_modify_ps_wake);
1442
1443 void iwl_sta_modify_sleep_tx_count(struct iwl_priv *priv, int sta_id, int cnt)
1444 {
1445         unsigned long flags;
1446
1447         spin_lock_irqsave(&priv->sta_lock, flags);
1448         priv->stations[sta_id].sta.station_flags |= STA_FLG_PWR_SAVE_MSK;
1449         priv->stations[sta_id].sta.station_flags_msk = STA_FLG_PWR_SAVE_MSK;
1450         priv->stations[sta_id].sta.sta.modify_mask =
1451                                         STA_MODIFY_SLEEP_TX_COUNT_MSK;
1452         priv->stations[sta_id].sta.sleep_tx_count = cpu_to_le16(cnt);
1453         priv->stations[sta_id].sta.mode = STA_CONTROL_MODIFY_MSK;
1454         iwl_send_add_sta(priv, &priv->stations[sta_id].sta, CMD_ASYNC);
1455         spin_unlock_irqrestore(&priv->sta_lock, flags);
1456
1457 }
1458 EXPORT_SYMBOL(iwl_sta_modify_sleep_tx_count);
1459
1460 int iwl_mac_sta_remove(struct ieee80211_hw *hw,
1461                        struct ieee80211_vif *vif,
1462                        struct ieee80211_sta *sta)
1463 {
1464         struct iwl_priv *priv = hw->priv;
1465         struct iwl_station_priv_common *sta_common = (void *)sta->drv_priv;
1466         int ret;
1467
1468         IWL_DEBUG_INFO(priv, "received request to remove station %pM\n",
1469                         sta->addr);
1470         mutex_lock(&priv->mutex);
1471         IWL_DEBUG_INFO(priv, "proceeding to remove station %pM\n",
1472                         sta->addr);
1473         ret = iwl_remove_station(priv, sta_common->sta_id, sta->addr);
1474         if (ret)
1475                 IWL_ERR(priv, "Error removing station %pM\n",
1476                         sta->addr);
1477         mutex_unlock(&priv->mutex);
1478         return ret;
1479 }
1480 EXPORT_SYMBOL(iwl_mac_sta_remove);