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

   1 /******************************************************************************
   2  *
   3  * Copyright(c) 2003 - 2012 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
  32 #include "iwl-dev.h"
  33 #include "iwl-core.h"
  34 #include "iwl-agn.h"
  35 #include "iwl-trans.h"
  36
  37 /* priv->shrd->sta_lock must be held */
  38 static int iwl_sta_ucode_activate(struct iwl_priv *priv, u8 sta_id)
  39 {
  40         if (sta_id >= IWLAGN_STATION_COUNT) {
  41                 IWL_ERR(priv, "invalid sta_id %u", sta_id);
  42                 return -EINVAL;
  43         }
  44         if (!(priv->stations[sta_id].used & IWL_STA_DRIVER_ACTIVE))
  45                 IWL_ERR(priv, "ACTIVATE a non DRIVER active station id %u "
  46                         "addr %pM\n",
  47                         sta_id, priv->stations[sta_id].sta.sta.addr);
  48
  49         if (priv->stations[sta_id].used & IWL_STA_UCODE_ACTIVE) {
  50                 IWL_DEBUG_ASSOC(priv,
  51                                 "STA id %u addr %pM already present in uCode "
  52                                 "(according to driver)\n",
  53                                 sta_id, priv->stations[sta_id].sta.sta.addr);
  54         } else {
  55                 priv->stations[sta_id].used |= IWL_STA_UCODE_ACTIVE;
  56                 IWL_DEBUG_ASSOC(priv, "Added STA id %u addr %pM to uCode\n",
  57                                 sta_id, priv->stations[sta_id].sta.sta.addr);
  58         }
  59         return 0;
  60 }
  61
  62 static int iwl_process_add_sta_resp(struct iwl_priv *priv,
  63                                     struct iwl_addsta_cmd *addsta,
  64                                     struct iwl_rx_packet *pkt)
  65 {
  66         u8 sta_id = addsta->sta.sta_id;
  67         unsigned long flags;
  68         int ret = -EIO;
  69
  70         if (pkt->hdr.flags & IWL_CMD_FAILED_MSK) {
  71                 IWL_ERR(priv, "Bad return from REPLY_ADD_STA (0x%08X)\n",
  72                         pkt->hdr.flags);
  73                 return ret;
  74         }
  75
  76         IWL_DEBUG_INFO(priv, "Processing response for adding station %u\n",
  77                        sta_id);
  78
  79         spin_lock_irqsave(&priv->shrd->sta_lock, flags);
  80
  81         switch (pkt->u.add_sta.status) {
  82         case ADD_STA_SUCCESS_MSK:
  83                 IWL_DEBUG_INFO(priv, "REPLY_ADD_STA PASSED\n");
  84                 ret = iwl_sta_ucode_activate(priv, sta_id);
  85                 break;
  86         case ADD_STA_NO_ROOM_IN_TABLE:
  87                 IWL_ERR(priv, "Adding station %d failed, no room in table.\n",
  88                         sta_id);
  89                 break;
  90         case ADD_STA_NO_BLOCK_ACK_RESOURCE:
  91                 IWL_ERR(priv, "Adding station %d failed, no block ack "
  92                         "resource.\n", sta_id);
  93                 break;
  94         case ADD_STA_MODIFY_NON_EXIST_STA:
  95                 IWL_ERR(priv, "Attempting to modify non-existing station %d\n",
  96                         sta_id);
  97                 break;
  98         default:
  99                 IWL_DEBUG_ASSOC(priv, "Received REPLY_ADD_STA:(0x%08X)\n",
 100                                 pkt->u.add_sta.status);
 101                 break;
 102         }
 103
 104         IWL_DEBUG_INFO(priv, "%s station id %u addr %pM\n",
 105                        priv->stations[sta_id].sta.mode ==
 106                        STA_CONTROL_MODIFY_MSK ?  "Modified" : "Added",
 107                        sta_id, priv->stations[sta_id].sta.sta.addr);
 108
 109         /*
 110          * XXX: The MAC address in the command buffer is often changed from
 111          * the original sent to the device. That is, the MAC address
 112          * written to the command buffer often is not the same MAC address
 113          * read from the command buffer when the command returns. This
 114          * issue has not yet been resolved and this debugging is left to
 115          * observe the problem.
 116          */
 117         IWL_DEBUG_INFO(priv, "%s station according to cmd buffer %pM\n",
 118                        priv->stations[sta_id].sta.mode ==
 119                        STA_CONTROL_MODIFY_MSK ? "Modified" : "Added",
 120                        addsta->sta.addr);
 121         spin_unlock_irqrestore(&priv->shrd->sta_lock, flags);
 122
 123         return ret;
 124 }
 125
 126 int iwl_add_sta_callback(struct iwl_priv *priv, struct iwl_rx_mem_buffer *rxb,
 127                                struct iwl_device_cmd *cmd)
 128 {
 129         struct iwl_rx_packet *pkt = rxb_addr(rxb);
 130         struct iwl_addsta_cmd *addsta =
 131                 (struct iwl_addsta_cmd *) cmd->payload;
 132
 133         return iwl_process_add_sta_resp(priv, addsta, pkt);
 134 }
 135
 136 int iwl_send_add_sta(struct iwl_priv *priv,
 137                      struct iwl_addsta_cmd *sta, u8 flags)
 138 {
 139         int ret = 0;
 140         struct iwl_host_cmd cmd = {
 141                 .id = REPLY_ADD_STA,
 142                 .flags = flags,
 143                 .data = { sta, },
 144                 .len = { sizeof(*sta), },
 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.flags |= CMD_WANT_SKB;
 153                 might_sleep();
 154         }
 155
 156         ret = iwl_trans_send_cmd(trans(priv), &cmd);
 157
 158         if (ret || (flags & CMD_ASYNC))
 159                 return ret;
 160         /*else the command was successfully sent in SYNC mode, need to free
 161          * the reply page */
 162
 163         iwl_free_pages(priv->shrd, cmd.reply_page);
 164
 165         if (cmd.handler_status)
 166                 IWL_ERR(priv, "%s - error in the CMD response %d", __func__,
 167                         cmd.handler_status);
 168
 169         return cmd.handler_status;
 170 }
 171
 172 static void iwl_set_ht_add_station(struct iwl_priv *priv, u8 index,
 173                                    struct ieee80211_sta *sta,
 174                                    struct iwl_rxon_context *ctx)
 175 {
 176         struct ieee80211_sta_ht_cap *sta_ht_inf = &sta->ht_cap;
 177         __le32 sta_flags;
 178         u8 mimo_ps_mode;
 179
 180         if (!sta || !sta_ht_inf->ht_supported)
 181                 goto done;
 182
 183         mimo_ps_mode = (sta_ht_inf->cap & IEEE80211_HT_CAP_SM_PS) >> 2;
 184         IWL_DEBUG_ASSOC(priv, "spatial multiplexing power save mode: %s\n",
 185                         (mimo_ps_mode == WLAN_HT_CAP_SM_PS_STATIC) ?
 186                         "static" :
 187                         (mimo_ps_mode == WLAN_HT_CAP_SM_PS_DYNAMIC) ?
 188                         "dynamic" : "disabled");
 189
 190         sta_flags = priv->stations[index].sta.station_flags;
 191
 192         sta_flags &= ~(STA_FLG_RTS_MIMO_PROT_MSK | STA_FLG_MIMO_DIS_MSK);
 193
 194         switch (mimo_ps_mode) {
 195         case WLAN_HT_CAP_SM_PS_STATIC:
 196                 sta_flags |= STA_FLG_MIMO_DIS_MSK;
 197                 break;
 198         case WLAN_HT_CAP_SM_PS_DYNAMIC:
 199                 sta_flags |= STA_FLG_RTS_MIMO_PROT_MSK;
 200                 break;
 201         case WLAN_HT_CAP_SM_PS_DISABLED:
 202                 break;
 203         default:
 204                 IWL_WARN(priv, "Invalid MIMO PS mode %d\n", mimo_ps_mode);
 205                 break;
 206         }
 207
 208         sta_flags |= cpu_to_le32(
 209               (u32)sta_ht_inf->ampdu_factor << STA_FLG_MAX_AGG_SIZE_POS);
 210
 211         sta_flags |= cpu_to_le32(
 212               (u32)sta_ht_inf->ampdu_density << STA_FLG_AGG_MPDU_DENSITY_POS);
 213
 214         if (iwl_is_ht40_tx_allowed(priv, ctx, &sta->ht_cap))
 215                 sta_flags |= STA_FLG_HT40_EN_MSK;
 216         else
 217                 sta_flags &= ~STA_FLG_HT40_EN_MSK;
 218
 219         priv->stations[index].sta.station_flags = sta_flags;
 220  done:
 221         return;
 222 }
 223
 224 /**
 225  * iwl_prep_station - Prepare station information for addition
 226  *
 227  * should be called with sta_lock held
 228  */
 229 u8 iwl_prep_station(struct iwl_priv *priv, struct iwl_rxon_context *ctx,
 230                     const u8 *addr, bool is_ap, struct ieee80211_sta *sta)
 231 {
 232         struct iwl_station_entry *station;
 233         int i;
 234         u8 sta_id = IWL_INVALID_STATION;
 235
 236         if (is_ap)
 237                 sta_id = ctx->ap_sta_id;
 238         else if (is_broadcast_ether_addr(addr))
 239                 sta_id = ctx->bcast_sta_id;
 240         else
 241                 for (i = IWL_STA_ID; i < IWLAGN_STATION_COUNT; i++) {
 242                         if (!compare_ether_addr(priv->stations[i].sta.sta.addr,
 243                                                 addr)) {
 244                                 sta_id = i;
 245                                 break;
 246                         }
 247
 248                         if (!priv->stations[i].used &&
 249                             sta_id == IWL_INVALID_STATION)
 250                                 sta_id = i;
 251                 }
 252
 253         /*
 254          * These two conditions have the same outcome, but keep them
 255          * separate
 256          */
 257         if (unlikely(sta_id == IWL_INVALID_STATION))
 258                 return sta_id;
 259
 260         /*
 261          * uCode is not able to deal with multiple requests to add a
 262          * station. Keep track if one is in progress so that we do not send
 263          * another.
 264          */
 265         if (priv->stations[sta_id].used & IWL_STA_UCODE_INPROGRESS) {
 266                 IWL_DEBUG_INFO(priv, "STA %d already in process of being "
 267                                "added.\n", sta_id);
 268                 return sta_id;
 269         }
 270
 271         if ((priv->stations[sta_id].used & IWL_STA_DRIVER_ACTIVE) &&
 272             (priv->stations[sta_id].used & IWL_STA_UCODE_ACTIVE) &&
 273             !compare_ether_addr(priv->stations[sta_id].sta.sta.addr, addr)) {
 274                 IWL_DEBUG_ASSOC(priv, "STA %d (%pM) already added, not "
 275                                 "adding again.\n", sta_id, addr);
 276                 return sta_id;
 277         }
 278
 279         station = &priv->stations[sta_id];
 280         station->used = IWL_STA_DRIVER_ACTIVE;
 281         IWL_DEBUG_ASSOC(priv, "Add STA to driver ID %d: %pM\n",
 282                         sta_id, addr);
 283         priv->num_stations++;
 284
 285         /* Set up the REPLY_ADD_STA command to send to device */
 286         memset(&station->sta, 0, sizeof(struct iwl_addsta_cmd));
 287         memcpy(station->sta.sta.addr, addr, ETH_ALEN);
 288         station->sta.mode = 0;
 289         station->sta.sta.sta_id = sta_id;
 290         station->sta.station_flags = ctx->station_flags;
 291         station->ctxid = ctx->ctxid;
 292
 293         if (sta) {
 294                 struct iwl_station_priv *sta_priv;
 295
 296                 sta_priv = (void *)sta->drv_priv;
 297                 sta_priv->ctx = ctx;
 298         }
 299
 300         /*
 301          * OK to call unconditionally, since local stations (IBSS BSSID
 302          * STA and broadcast STA) pass in a NULL sta, and mac80211
 303          * doesn't allow HT IBSS.
 304          */
 305         iwl_set_ht_add_station(priv, sta_id, sta, ctx);
 306
 307         return sta_id;
 308
 309 }
 310
 311 #define STA_WAIT_TIMEOUT (HZ/2)
 312
 313 /**
 314  * iwl_add_station_common -
 315  */
 316 int iwl_add_station_common(struct iwl_priv *priv, struct iwl_rxon_context *ctx,
 317                            const u8 *addr, bool is_ap,
 318                            struct ieee80211_sta *sta, u8 *sta_id_r)
 319 {
 320         unsigned long flags_spin;
 321         int ret = 0;
 322         u8 sta_id;
 323         struct iwl_addsta_cmd sta_cmd;
 324
 325         *sta_id_r = 0;
 326         spin_lock_irqsave(&priv->shrd->sta_lock, flags_spin);
 327         sta_id = iwl_prep_station(priv, ctx, addr, is_ap, sta);
 328         if (sta_id == IWL_INVALID_STATION) {
 329                 IWL_ERR(priv, "Unable to prepare station %pM for addition\n",
 330                         addr);
 331                 spin_unlock_irqrestore(&priv->shrd->sta_lock, flags_spin);
 332                 return -EINVAL;
 333         }
 334
 335         /*
 336          * uCode is not able to deal with multiple requests to add a
 337          * station. Keep track if one is in progress so that we do not send
 338          * another.
 339          */
 340         if (priv->stations[sta_id].used & IWL_STA_UCODE_INPROGRESS) {
 341                 IWL_DEBUG_INFO(priv, "STA %d already in process of being "
 342                                "added.\n", sta_id);
 343                 spin_unlock_irqrestore(&priv->shrd->sta_lock, flags_spin);
 344                 return -EEXIST;
 345         }
 346
 347         if ((priv->stations[sta_id].used & IWL_STA_DRIVER_ACTIVE) &&
 348             (priv->stations[sta_id].used & IWL_STA_UCODE_ACTIVE)) {
 349                 IWL_DEBUG_ASSOC(priv, "STA %d (%pM) already added, not "
 350                                 "adding again.\n", sta_id, addr);
 351                 spin_unlock_irqrestore(&priv->shrd->sta_lock, flags_spin);
 352                 return -EEXIST;
 353         }
 354
 355         priv->stations[sta_id].used |= IWL_STA_UCODE_INPROGRESS;
 356         memcpy(&sta_cmd, &priv->stations[sta_id].sta,
 357                sizeof(struct iwl_addsta_cmd));
 358         spin_unlock_irqrestore(&priv->shrd->sta_lock, flags_spin);
 359
 360         /* Add station to device's station table */
 361         ret = iwl_send_add_sta(priv, &sta_cmd, CMD_SYNC);
 362         if (ret) {
 363                 spin_lock_irqsave(&priv->shrd->sta_lock, flags_spin);
 364                 IWL_ERR(priv, "Adding station %pM failed.\n",
 365                         priv->stations[sta_id].sta.sta.addr);
 366                 priv->stations[sta_id].used &= ~IWL_STA_DRIVER_ACTIVE;
 367                 priv->stations[sta_id].used &= ~IWL_STA_UCODE_INPROGRESS;
 368                 spin_unlock_irqrestore(&priv->shrd->sta_lock, flags_spin);
 369         }
 370         *sta_id_r = sta_id;
 371         return ret;
 372 }
 373
 374 /**
 375  * iwl_sta_ucode_deactivate - deactivate ucode status for a station
 376  *
 377  * priv->shrd->sta_lock must be held
 378  */
 379 static void iwl_sta_ucode_deactivate(struct iwl_priv *priv, u8 sta_id)
 380 {
 381         /* Ucode must be active and driver must be non active */
 382         if ((priv->stations[sta_id].used &
 383              (IWL_STA_UCODE_ACTIVE | IWL_STA_DRIVER_ACTIVE)) !=
 384               IWL_STA_UCODE_ACTIVE)
 385                 IWL_ERR(priv, "removed non active STA %u\n", sta_id);
 386
 387         priv->stations[sta_id].used &= ~IWL_STA_UCODE_ACTIVE;
 388
 389         memset(&priv->stations[sta_id], 0, sizeof(struct iwl_station_entry));
 390         IWL_DEBUG_ASSOC(priv, "Removed STA %u\n", sta_id);
 391 }
 392
 393 static int iwl_send_remove_station(struct iwl_priv *priv,
 394                                    const u8 *addr, int sta_id,
 395                                    bool temporary)
 396 {
 397         struct iwl_rx_packet *pkt;
 398         int ret;
 399
 400         unsigned long flags_spin;
 401         struct iwl_rem_sta_cmd rm_sta_cmd;
 402
 403         struct iwl_host_cmd cmd = {
 404                 .id = REPLY_REMOVE_STA,
 405                 .len = { sizeof(struct iwl_rem_sta_cmd), },
 406                 .flags = CMD_SYNC,
 407                 .data = { &rm_sta_cmd, },
 408         };
 409
 410         memset(&rm_sta_cmd, 0, sizeof(rm_sta_cmd));
 411         rm_sta_cmd.num_sta = 1;
 412         memcpy(&rm_sta_cmd.addr, addr, ETH_ALEN);
 413
 414         cmd.flags |= CMD_WANT_SKB;
 415
 416         ret = iwl_trans_send_cmd(trans(priv), &cmd);
 417
 418         if (ret)
 419                 return ret;
 420
 421         pkt = (struct iwl_rx_packet *)cmd.reply_page;
 422         if (pkt->hdr.flags & IWL_CMD_FAILED_MSK) {
 423                 IWL_ERR(priv, "Bad return from REPLY_REMOVE_STA (0x%08X)\n",
 424                           pkt->hdr.flags);
 425                 ret = -EIO;
 426         }
 427
 428         if (!ret) {
 429                 switch (pkt->u.rem_sta.status) {
 430                 case REM_STA_SUCCESS_MSK:
 431                         if (!temporary) {
 432                                 spin_lock_irqsave(&priv->shrd->sta_lock,
 433                                         flags_spin);
 434                                 iwl_sta_ucode_deactivate(priv, sta_id);
 435                                 spin_unlock_irqrestore(&priv->shrd->sta_lock,
 436                                         flags_spin);
 437                         }
 438                         IWL_DEBUG_ASSOC(priv, "REPLY_REMOVE_STA PASSED\n");
 439                         break;
 440                 default:
 441                         ret = -EIO;
 442                         IWL_ERR(priv, "REPLY_REMOVE_STA failed\n");
 443                         break;
 444                 }
 445         }
 446         iwl_free_pages(priv->shrd, cmd.reply_page);
 447
 448         return ret;
 449 }
 450
 451 /**
 452  * iwl_remove_station - Remove driver's knowledge of station.
 453  */
 454 int iwl_remove_station(struct iwl_priv *priv, const u8 sta_id,
 455                        const u8 *addr)
 456 {
 457         unsigned long flags;
 458         u8 tid;
 459
 460         if (!iwl_is_ready(priv->shrd)) {
 461                 IWL_DEBUG_INFO(priv,
 462                         "Unable to remove station %pM, device not ready.\n",
 463                         addr);
 464                 /*
 465                  * It is typical for stations to be removed when we are
 466                  * going down. Return success since device will be down
 467                  * soon anyway
 468                  */
 469                 return 0;
 470         }
 471
 472         IWL_DEBUG_ASSOC(priv, "Removing STA from driver:%d  %pM\n",
 473                         sta_id, addr);
 474
 475         if (WARN_ON(sta_id == IWL_INVALID_STATION))
 476                 return -EINVAL;
 477
 478         spin_lock_irqsave(&priv->shrd->sta_lock, flags);
 479
 480         if (!(priv->stations[sta_id].used & IWL_STA_DRIVER_ACTIVE)) {
 481                 IWL_DEBUG_INFO(priv, "Removing %pM but non DRIVER active\n",
 482                                 addr);
 483                 goto out_err;
 484         }
 485
 486         if (!(priv->stations[sta_id].used & IWL_STA_UCODE_ACTIVE)) {
 487                 IWL_DEBUG_INFO(priv, "Removing %pM but non UCODE active\n",
 488                                 addr);
 489                 goto out_err;
 490         }
 491
 492         if (priv->stations[sta_id].used & IWL_STA_LOCAL) {
 493                 kfree(priv->stations[sta_id].lq);
 494                 priv->stations[sta_id].lq = NULL;
 495         }
 496
 497         for (tid = 0; tid < IWL_MAX_TID_COUNT; tid++)
 498                 memset(&priv->tid_data[sta_id][tid], 0,
 499                         sizeof(priv->tid_data[sta_id][tid]));
 500
 501         priv->stations[sta_id].used &= ~IWL_STA_DRIVER_ACTIVE;
 502
 503         priv->num_stations--;
 504
 505         if (WARN_ON(priv->num_stations < 0))
 506                 priv->num_stations = 0;
 507
 508         spin_unlock_irqrestore(&priv->shrd->sta_lock, flags);
 509
 510         return iwl_send_remove_station(priv, addr, sta_id, false);
 511 out_err:
 512         spin_unlock_irqrestore(&priv->shrd->sta_lock, flags);
 513         return -EINVAL;
 514 }
 515
 516 /**
 517  * iwl_clear_ucode_stations - clear ucode station table bits
 518  *
 519  * This function clears all the bits in the driver indicating
 520  * which stations are active in the ucode. Call when something
 521  * other than explicit station management would cause this in
 522  * the ucode, e.g. unassociated RXON.
 523  */
 524 void iwl_clear_ucode_stations(struct iwl_priv *priv,
 525                               struct iwl_rxon_context *ctx)
 526 {
 527         int i;
 528         unsigned long flags_spin;
 529         bool cleared = false;
 530
 531         IWL_DEBUG_INFO(priv, "Clearing ucode stations in driver\n");
 532
 533         spin_lock_irqsave(&priv->shrd->sta_lock, flags_spin);
 534         for (i = 0; i < IWLAGN_STATION_COUNT; i++) {
 535                 if (ctx && ctx->ctxid != priv->stations[i].ctxid)
 536                         continue;
 537
 538                 if (priv->stations[i].used & IWL_STA_UCODE_ACTIVE) {
 539                         IWL_DEBUG_INFO(priv,
 540                                 "Clearing ucode active for station %d\n", i);
 541                         priv->stations[i].used &= ~IWL_STA_UCODE_ACTIVE;
 542                         cleared = true;
 543                 }
 544         }
 545         spin_unlock_irqrestore(&priv->shrd->sta_lock, flags_spin);
 546
 547         if (!cleared)
 548                 IWL_DEBUG_INFO(priv,
 549                                "No active stations found to be cleared\n");
 550 }
 551
 552 /**
 553  * iwl_restore_stations() - Restore driver known stations to device
 554  *
 555  * All stations considered active by driver, but not present in ucode, is
 556  * restored.
 557  *
 558  * Function sleeps.
 559  */
 560 void iwl_restore_stations(struct iwl_priv *priv, struct iwl_rxon_context *ctx)
 561 {
 562         struct iwl_addsta_cmd sta_cmd;
 563         struct iwl_link_quality_cmd lq;
 564         unsigned long flags_spin;
 565         int i;
 566         bool found = false;
 567         int ret;
 568         bool send_lq;
 569
 570         if (!iwl_is_ready(priv->shrd)) {
 571                 IWL_DEBUG_INFO(priv,
 572                                "Not ready yet, not restoring any stations.\n");
 573                 return;
 574         }
 575
 576         IWL_DEBUG_ASSOC(priv, "Restoring all known stations ... start.\n");
 577         spin_lock_irqsave(&priv->shrd->sta_lock, flags_spin);
 578         for (i = 0; i < IWLAGN_STATION_COUNT; i++) {
 579                 if (ctx->ctxid != priv->stations[i].ctxid)
 580                         continue;
 581                 if ((priv->stations[i].used & IWL_STA_DRIVER_ACTIVE) &&
 582                             !(priv->stations[i].used & IWL_STA_UCODE_ACTIVE)) {
 583                         IWL_DEBUG_ASSOC(priv, "Restoring sta %pM\n",
 584                                         priv->stations[i].sta.sta.addr);
 585                         priv->stations[i].sta.mode = 0;
 586                         priv->stations[i].used |= IWL_STA_UCODE_INPROGRESS;
 587                         found = true;
 588                 }
 589         }
 590
 591         for (i = 0; i < IWLAGN_STATION_COUNT; i++) {
 592                 if ((priv->stations[i].used & IWL_STA_UCODE_INPROGRESS)) {
 593                         memcpy(&sta_cmd, &priv->stations[i].sta,
 594                                sizeof(struct iwl_addsta_cmd));
 595                         send_lq = false;
 596                         if (priv->stations[i].lq) {
 597                                 if (priv->shrd->wowlan)
 598                                         iwl_sta_fill_lq(priv, ctx, i, &lq);
 599                                 else
 600                                         memcpy(&lq, priv->stations[i].lq,
 601                                                sizeof(struct iwl_link_quality_cmd));
 602                                 send_lq = true;
 603                         }
 604                         spin_unlock_irqrestore(&priv->shrd->sta_lock,
 605                                                flags_spin);
 606                         ret = iwl_send_add_sta(priv, &sta_cmd, CMD_SYNC);
 607                         if (ret) {
 608                                 spin_lock_irqsave(&priv->shrd->sta_lock,
 609                                                   flags_spin);
 610                                 IWL_ERR(priv, "Adding station %pM failed.\n",
 611                                         priv->stations[i].sta.sta.addr);
 612                                 priv->stations[i].used &=
 613                                                 ~IWL_STA_DRIVER_ACTIVE;
 614                                 priv->stations[i].used &=
 615                                                 ~IWL_STA_UCODE_INPROGRESS;
 616                                 spin_unlock_irqrestore(&priv->shrd->sta_lock,
 617                                                        flags_spin);
 618                         }
 619                         /*
 620                          * Rate scaling has already been initialized, send
 621                          * current LQ command
 622                          */
 623                         if (send_lq)
 624                                 iwl_send_lq_cmd(priv, ctx, &lq,
 625                                                 CMD_SYNC, true);
 626                         spin_lock_irqsave(&priv->shrd->sta_lock, flags_spin);
 627                         priv->stations[i].used &= ~IWL_STA_UCODE_INPROGRESS;
 628                 }
 629         }
 630
 631         spin_unlock_irqrestore(&priv->shrd->sta_lock, flags_spin);
 632         if (!found)
 633                 IWL_DEBUG_INFO(priv, "Restoring all known stations .... "
 634                         "no stations to be restored.\n");
 635         else
 636                 IWL_DEBUG_INFO(priv, "Restoring all known stations .... "
 637                         "complete.\n");
 638 }
 639
 640 void iwl_reprogram_ap_sta(struct iwl_priv *priv, struct iwl_rxon_context *ctx)
 641 {
 642         unsigned long flags;
 643         int sta_id = ctx->ap_sta_id;
 644         int ret;
 645         struct iwl_addsta_cmd sta_cmd;
 646         struct iwl_link_quality_cmd lq;
 647         bool active, have_lq = false;
 648
 649         spin_lock_irqsave(&priv->shrd->sta_lock, flags);
 650         if (!(priv->stations[sta_id].used & IWL_STA_DRIVER_ACTIVE)) {
 651                 spin_unlock_irqrestore(&priv->shrd->sta_lock, flags);
 652                 return;
 653         }
 654
 655         memcpy(&sta_cmd, &priv->stations[sta_id].sta, sizeof(sta_cmd));
 656         sta_cmd.mode = 0;
 657         if (priv->stations[sta_id].lq) {
 658                 memcpy(&lq, priv->stations[sta_id].lq, sizeof(lq));
 659                 have_lq = true;
 660         }
 661
 662         active = priv->stations[sta_id].used & IWL_STA_UCODE_ACTIVE;
 663         priv->stations[sta_id].used &= ~IWL_STA_DRIVER_ACTIVE;
 664         spin_unlock_irqrestore(&priv->shrd->sta_lock, flags);
 665
 666         if (active) {
 667                 ret = iwl_send_remove_station(
 668                         priv, priv->stations[sta_id].sta.sta.addr,
 669                         sta_id, true);
 670                 if (ret)
 671                         IWL_ERR(priv, "failed to remove STA %pM (%d)\n",
 672                                 priv->stations[sta_id].sta.sta.addr, ret);
 673         }
 674         spin_lock_irqsave(&priv->shrd->sta_lock, flags);
 675         priv->stations[sta_id].used |= IWL_STA_DRIVER_ACTIVE;
 676         spin_unlock_irqrestore(&priv->shrd->sta_lock, flags);
 677
 678         ret = iwl_send_add_sta(priv, &sta_cmd, CMD_SYNC);
 679         if (ret)
 680                 IWL_ERR(priv, "failed to re-add STA %pM (%d)\n",
 681                         priv->stations[sta_id].sta.sta.addr, ret);
 682         if (have_lq)
 683                 iwl_send_lq_cmd(priv, ctx, &lq, CMD_SYNC, true);
 684 }
 685
 686 int iwl_get_free_ucode_key_offset(struct iwl_priv *priv)
 687 {
 688         int i;
 689
 690         for (i = 0; i < priv->sta_key_max_num; i++)
 691                 if (!test_and_set_bit(i, &priv->ucode_key_table))
 692                         return i;
 693
 694         return WEP_INVALID_OFFSET;
 695 }
 696
 697 void iwl_dealloc_bcast_stations(struct iwl_priv *priv)
 698 {
 699         unsigned long flags;
 700         int i;
 701
 702         spin_lock_irqsave(&priv->shrd->sta_lock, flags);
 703         for (i = 0; i < IWLAGN_STATION_COUNT; i++) {
 704                 if (!(priv->stations[i].used & IWL_STA_BCAST))
 705                         continue;
 706
 707                 priv->stations[i].used &= ~IWL_STA_UCODE_ACTIVE;
 708                 priv->num_stations--;
 709                 if (WARN_ON(priv->num_stations < 0))
 710                         priv->num_stations = 0;
 711                 kfree(priv->stations[i].lq);
 712                 priv->stations[i].lq = NULL;
 713         }
 714         spin_unlock_irqrestore(&priv->shrd->sta_lock, flags);
 715 }
 716
 717 #ifdef CONFIG_IWLWIFI_DEBUG
 718 static void iwl_dump_lq_cmd(struct iwl_priv *priv,
 719                            struct iwl_link_quality_cmd *lq)
 720 {
 721         int i;
 722         IWL_DEBUG_RATE(priv, "lq station id 0x%x\n", lq->sta_id);
 723         IWL_DEBUG_RATE(priv, "lq ant 0x%X 0x%X\n",
 724                        lq->general_params.single_stream_ant_msk,
 725                        lq->general_params.dual_stream_ant_msk);
 726
 727         for (i = 0; i < LINK_QUAL_MAX_RETRY_NUM; i++)
 728                 IWL_DEBUG_RATE(priv, "lq index %d 0x%X\n",
 729                                i, lq->rs_table[i].rate_n_flags);
 730 }
 731 #else
 732 static inline void iwl_dump_lq_cmd(struct iwl_priv *priv,
 733                                    struct iwl_link_quality_cmd *lq)
 734 {
 735 }
 736 #endif
 737
 738 /**
 739  * is_lq_table_valid() - Test one aspect of LQ cmd for validity
 740  *
 741  * It sometimes happens when a HT rate has been in use and we
 742  * loose connectivity with AP then mac80211 will first tell us that the
 743  * current channel is not HT anymore before removing the station. In such a
 744  * scenario the RXON flags will be updated to indicate we are not
 745  * communicating HT anymore, but the LQ command may still contain HT rates.
 746  * Test for this to prevent driver from sending LQ command between the time
 747  * RXON flags are updated and when LQ command is updated.
 748  */
 749 static bool is_lq_table_valid(struct iwl_priv *priv,
 750                               struct iwl_rxon_context *ctx,
 751                               struct iwl_link_quality_cmd *lq)
 752 {
 753         int i;
 754
 755         if (ctx->ht.enabled)
 756                 return true;
 757
 758         IWL_DEBUG_INFO(priv, "Channel %u is not an HT channel\n",
 759                        ctx->active.channel);
 760         for (i = 0; i < LINK_QUAL_MAX_RETRY_NUM; i++) {
 761                 if (le32_to_cpu(lq->rs_table[i].rate_n_flags) &
 762                     RATE_MCS_HT_MSK) {
 763                         IWL_DEBUG_INFO(priv,
 764                                        "index %d of LQ expects HT channel\n",
 765                                        i);
 766                         return false;
 767                 }
 768         }
 769         return true;
 770 }
 771
 772 /**
 773  * iwl_send_lq_cmd() - Send link quality command
 774  * @init: This command is sent as part of station initialization right
 775  *        after station has been added.
 776  *
 777  * The link quality command is sent as the last step of station creation.
 778  * This is the special case in which init is set and we call a callback in
 779  * this case to clear the state indicating that station creation is in
 780  * progress.
 781  */
 782 int iwl_send_lq_cmd(struct iwl_priv *priv, struct iwl_rxon_context *ctx,
 783                     struct iwl_link_quality_cmd *lq, u8 flags, bool init)
 784 {
 785         int ret = 0;
 786         unsigned long flags_spin;
 787
 788         struct iwl_host_cmd cmd = {
 789                 .id = REPLY_TX_LINK_QUALITY_CMD,
 790                 .len = { sizeof(struct iwl_link_quality_cmd), },
 791                 .flags = flags,
 792                 .data = { lq, },
 793         };
 794
 795         if (WARN_ON(lq->sta_id == IWL_INVALID_STATION))
 796                 return -EINVAL;
 797
 798
 799         spin_lock_irqsave(&priv->shrd->sta_lock, flags_spin);
 800         if (!(priv->stations[lq->sta_id].used & IWL_STA_DRIVER_ACTIVE)) {
 801                 spin_unlock_irqrestore(&priv->shrd->sta_lock, flags_spin);
 802                 return -EINVAL;
 803         }
 804         spin_unlock_irqrestore(&priv->shrd->sta_lock, flags_spin);
 805
 806         iwl_dump_lq_cmd(priv, lq);
 807         if (WARN_ON(init && (cmd.flags & CMD_ASYNC)))
 808                 return -EINVAL;
 809
 810         if (is_lq_table_valid(priv, ctx, lq))
 811                 ret = iwl_trans_send_cmd(trans(priv), &cmd);
 812         else
 813                 ret = -EINVAL;
 814
 815         if (cmd.flags & CMD_ASYNC)
 816                 return ret;
 817
 818         if (init) {
 819                 IWL_DEBUG_INFO(priv, "init LQ command complete, "
 820                                "clearing sta addition status for sta %d\n",
 821                                lq->sta_id);
 822                 spin_lock_irqsave(&priv->shrd->sta_lock, flags_spin);
 823                 priv->stations[lq->sta_id].used &= ~IWL_STA_UCODE_INPROGRESS;
 824                 spin_unlock_irqrestore(&priv->shrd->sta_lock, flags_spin);
 825         }
 826         return ret;
 827 }
 828
 829
 830 void iwl_sta_fill_lq(struct iwl_priv *priv, struct iwl_rxon_context *ctx,
 831                      u8 sta_id, struct iwl_link_quality_cmd *link_cmd)
 832 {
 833         int i, r;
 834         u32 rate_flags = 0;
 835         __le32 rate_n_flags;
 836
 837         lockdep_assert_held(&priv->shrd->mutex);
 838
 839         memset(link_cmd, 0, sizeof(*link_cmd));
 840
 841         /* Set up the rate scaling to start at selected rate, fall back
 842          * all the way down to 1M in IEEE order, and then spin on 1M */
 843         if (priv->band == IEEE80211_BAND_5GHZ)
 844                 r = IWL_RATE_6M_INDEX;
 845         else if (ctx && ctx->vif && ctx->vif->p2p)
 846                 r = IWL_RATE_6M_INDEX;
 847         else
 848                 r = IWL_RATE_1M_INDEX;
 849
 850         if (r >= IWL_FIRST_CCK_RATE && r <= IWL_LAST_CCK_RATE)
 851                 rate_flags |= RATE_MCS_CCK_MSK;
 852
 853         rate_flags |= first_antenna(hw_params(priv).valid_tx_ant) <<
 854                                 RATE_MCS_ANT_POS;
 855         rate_n_flags = iwl_hw_set_rate_n_flags(iwl_rates[r].plcp, rate_flags);
 856         for (i = 0; i < LINK_QUAL_MAX_RETRY_NUM; i++)
 857                 link_cmd->rs_table[i].rate_n_flags = rate_n_flags;
 858
 859         link_cmd->general_params.single_stream_ant_msk =
 860                         first_antenna(hw_params(priv).valid_tx_ant);
 861
 862         link_cmd->general_params.dual_stream_ant_msk =
 863                 hw_params(priv).valid_tx_ant &
 864                 ~first_antenna(hw_params(priv).valid_tx_ant);
 865         if (!link_cmd->general_params.dual_stream_ant_msk) {
 866                 link_cmd->general_params.dual_stream_ant_msk = ANT_AB;
 867         } else if (num_of_ant(hw_params(priv).valid_tx_ant) == 2) {
 868                 link_cmd->general_params.dual_stream_ant_msk =
 869                         hw_params(priv).valid_tx_ant;
 870         }
 871
 872         link_cmd->agg_params.agg_dis_start_th =
 873                 LINK_QUAL_AGG_DISABLE_START_DEF;
 874         link_cmd->agg_params.agg_time_limit =
 875                 cpu_to_le16(LINK_QUAL_AGG_TIME_LIMIT_DEF);
 876
 877         link_cmd->sta_id = sta_id;
 878 }
 879
 880 static struct iwl_link_quality_cmd *
 881 iwl_sta_alloc_lq(struct iwl_priv *priv, struct iwl_rxon_context *ctx,
 882                  u8 sta_id)
 883 {
 884         struct iwl_link_quality_cmd *link_cmd;
 885
 886         link_cmd = kzalloc(sizeof(struct iwl_link_quality_cmd), GFP_KERNEL);
 887         if (!link_cmd) {
 888                 IWL_ERR(priv, "Unable to allocate memory for LQ cmd.\n");
 889                 return NULL;
 890         }
 891
 892         iwl_sta_fill_lq(priv, ctx, sta_id, link_cmd);
 893
 894         return link_cmd;
 895 }
 896
 897 /*
 898  * iwlagn_add_bssid_station - Add the special IBSS BSSID station
 899  *
 900  * Function sleeps.
 901  */
 902 int iwlagn_add_bssid_station(struct iwl_priv *priv,
 903                              struct iwl_rxon_context *ctx,
 904                              const u8 *addr, u8 *sta_id_r)
 905 {
 906         int ret;
 907         u8 sta_id;
 908         struct iwl_link_quality_cmd *link_cmd;
 909         unsigned long flags;
 910
 911         if (sta_id_r)
 912                 *sta_id_r = IWL_INVALID_STATION;
 913
 914         ret = iwl_add_station_common(priv, ctx, addr, 0, NULL, &sta_id);
 915         if (ret) {
 916                 IWL_ERR(priv, "Unable to add station %pM\n", addr);
 917                 return ret;
 918         }
 919
 920         if (sta_id_r)
 921                 *sta_id_r = sta_id;
 922
 923         spin_lock_irqsave(&priv->shrd->sta_lock, flags);
 924         priv->stations[sta_id].used |= IWL_STA_LOCAL;
 925         spin_unlock_irqrestore(&priv->shrd->sta_lock, flags);
 926
 927         /* Set up default rate scaling table in device's station table */
 928         link_cmd = iwl_sta_alloc_lq(priv, ctx, sta_id);
 929         if (!link_cmd) {
 930                 IWL_ERR(priv,
 931                         "Unable to initialize rate scaling for station %pM.\n",
 932                         addr);
 933                 return -ENOMEM;
 934         }
 935
 936         ret = iwl_send_lq_cmd(priv, ctx, link_cmd, CMD_SYNC, true);
 937         if (ret)
 938                 IWL_ERR(priv, "Link quality command failed (%d)\n", ret);
 939
 940         spin_lock_irqsave(&priv->shrd->sta_lock, flags);
 941         priv->stations[sta_id].lq = link_cmd;
 942         spin_unlock_irqrestore(&priv->shrd->sta_lock, flags);
 943
 944         return 0;
 945 }
 946
 947 /*
 948  * static WEP keys
 949  *
 950  * For each context, the device has a table of 4 static WEP keys
 951  * (one for each key index) that is updated with the following
 952  * commands.
 953  */
 954
 955 static int iwl_send_static_wepkey_cmd(struct iwl_priv *priv,
 956                                       struct iwl_rxon_context *ctx,
 957                                       bool send_if_empty)
 958 {
 959         int i, not_empty = 0;
 960         u8 buff[sizeof(struct iwl_wep_cmd) +
 961                 sizeof(struct iwl_wep_key) * WEP_KEYS_MAX];
 962         struct iwl_wep_cmd *wep_cmd = (struct iwl_wep_cmd *)buff;
 963         size_t cmd_size  = sizeof(struct iwl_wep_cmd);
 964         struct iwl_host_cmd cmd = {
 965                 .id = ctx->wep_key_cmd,
 966                 .data = { wep_cmd, },
 967                 .flags = CMD_SYNC,
 968         };
 969
 970         might_sleep();
 971
 972         memset(wep_cmd, 0, cmd_size +
 973                         (sizeof(struct iwl_wep_key) * WEP_KEYS_MAX));
 974
 975         for (i = 0; i < WEP_KEYS_MAX ; i++) {
 976                 wep_cmd->key[i].key_index = i;
 977                 if (ctx->wep_keys[i].key_size) {
 978                         wep_cmd->key[i].key_offset = i;
 979                         not_empty = 1;
 980                 } else {
 981                         wep_cmd->key[i].key_offset = WEP_INVALID_OFFSET;
 982                 }
 983
 984                 wep_cmd->key[i].key_size = ctx->wep_keys[i].key_size;
 985                 memcpy(&wep_cmd->key[i].key[3], ctx->wep_keys[i].key,
 986                                 ctx->wep_keys[i].key_size);
 987         }
 988
 989         wep_cmd->global_key_type = WEP_KEY_WEP_TYPE;
 990         wep_cmd->num_keys = WEP_KEYS_MAX;
 991
 992         cmd_size += sizeof(struct iwl_wep_key) * WEP_KEYS_MAX;
 993
 994         cmd.len[0] = cmd_size;
 995
 996         if (not_empty || send_if_empty)
 997                 return iwl_trans_send_cmd(trans(priv), &cmd);
 998         else
 999                 return 0;
1000 }
1001
1002 int iwl_restore_default_wep_keys(struct iwl_priv *priv,
1003                                  struct iwl_rxon_context *ctx)
1004 {
1005         lockdep_assert_held(&priv->shrd->mutex);
1006
1007         return iwl_send_static_wepkey_cmd(priv, ctx, false);
1008 }
1009
1010 int iwl_remove_default_wep_key(struct iwl_priv *priv,
1011                                struct iwl_rxon_context *ctx,
1012                                struct ieee80211_key_conf *keyconf)
1013 {
1014         int ret;
1015
1016         lockdep_assert_held(&priv->shrd->mutex);
1017
1018         IWL_DEBUG_WEP(priv, "Removing default WEP key: idx=%d\n",
1019                       keyconf->keyidx);
1020
1021         memset(&ctx->wep_keys[keyconf->keyidx], 0, sizeof(ctx->wep_keys[0]));
1022         if (iwl_is_rfkill(priv->shrd)) {
1023                 IWL_DEBUG_WEP(priv,
1024                         "Not sending REPLY_WEPKEY command due to RFKILL.\n");
1025                 /* but keys in device are clear anyway so return success */
1026                 return 0;
1027         }
1028         ret = iwl_send_static_wepkey_cmd(priv, ctx, 1);
1029         IWL_DEBUG_WEP(priv, "Remove default WEP key: idx=%d ret=%d\n",
1030                       keyconf->keyidx, ret);
1031
1032         return ret;
1033 }
1034
1035 int iwl_set_default_wep_key(struct iwl_priv *priv,
1036                             struct iwl_rxon_context *ctx,
1037                             struct ieee80211_key_conf *keyconf)
1038 {
1039         int ret;
1040
1041         lockdep_assert_held(&priv->shrd->mutex);
1042
1043         if (keyconf->keylen != WEP_KEY_LEN_128 &&
1044             keyconf->keylen != WEP_KEY_LEN_64) {
1045                 IWL_DEBUG_WEP(priv,
1046                               "Bad WEP key length %d\n", keyconf->keylen);
1047                 return -EINVAL;
1048         }
1049
1050         keyconf->hw_key_idx = IWLAGN_HW_KEY_DEFAULT;
1051
1052         ctx->wep_keys[keyconf->keyidx].key_size = keyconf->keylen;
1053         memcpy(&ctx->wep_keys[keyconf->keyidx].key, &keyconf->key,
1054                                                         keyconf->keylen);
1055
1056         ret = iwl_send_static_wepkey_cmd(priv, ctx, false);
1057         IWL_DEBUG_WEP(priv, "Set default WEP key: len=%d idx=%d ret=%d\n",
1058                 keyconf->keylen, keyconf->keyidx, ret);
1059
1060         return ret;
1061 }
1062
1063 /*
1064  * dynamic (per-station) keys
1065  *
1066  * The dynamic keys are a little more complicated. The device has
1067  * a key cache of up to STA_KEY_MAX_NUM/STA_KEY_MAX_NUM_PAN keys.
1068  * These are linked to stations by a table that contains an index
1069  * into the key table for each station/key index/{mcast,unicast},
1070  * i.e. it's basically an array of pointers like this:
1071  *      key_offset_t key_mapping[NUM_STATIONS][4][2];
1072  * (it really works differently, but you can think of it as such)
1073  *
1074  * The key uploading and linking happens in the same command, the
1075  * add station command with STA_MODIFY_KEY_MASK.
1076  */
1077
1078 static u8 iwlagn_key_sta_id(struct iwl_priv *priv,
1079                             struct ieee80211_vif *vif,
1080                             struct ieee80211_sta *sta)
1081 {
1082         struct iwl_vif_priv *vif_priv = (void *)vif->drv_priv;
1083         u8 sta_id = IWL_INVALID_STATION;
1084
1085         if (sta)
1086                 sta_id = iwl_sta_id(sta);
1087
1088         /*
1089          * The device expects GTKs for station interfaces to be
1090          * installed as GTKs for the AP station. If we have no
1091          * station ID, then use the ap_sta_id in that case.
1092          */
1093         if (!sta && vif && vif_priv->ctx) {
1094                 switch (vif->type) {
1095                 case NL80211_IFTYPE_STATION:
1096                         sta_id = vif_priv->ctx->ap_sta_id;
1097                         break;
1098                 default:
1099                         /*
1100                          * In all other cases, the key will be
1101                          * used either for TX only or is bound
1102                          * to a station already.
1103                          */
1104                         break;
1105                 }
1106         }
1107
1108         return sta_id;
1109 }
1110
1111 static int iwlagn_send_sta_key(struct iwl_priv *priv,
1112                                struct ieee80211_key_conf *keyconf,
1113                                u8 sta_id, u32 tkip_iv32, u16 *tkip_p1k,
1114                                u32 cmd_flags)
1115 {
1116         unsigned long flags;
1117         __le16 key_flags;
1118         struct iwl_addsta_cmd sta_cmd;
1119         int i;
1120
1121         spin_lock_irqsave(&priv->shrd->sta_lock, flags);
1122         memcpy(&sta_cmd, &priv->stations[sta_id].sta, sizeof(sta_cmd));
1123         spin_unlock_irqrestore(&priv->shrd->sta_lock, flags);
1124
1125         key_flags = cpu_to_le16(keyconf->keyidx << STA_KEY_FLG_KEYID_POS);
1126         key_flags |= STA_KEY_FLG_MAP_KEY_MSK;
1127
1128         switch (keyconf->cipher) {
1129         case WLAN_CIPHER_SUITE_CCMP:
1130                 key_flags |= STA_KEY_FLG_CCMP;
1131                 memcpy(sta_cmd.key.key, keyconf->key, keyconf->keylen);
1132                 break;
1133         case WLAN_CIPHER_SUITE_TKIP:
1134                 key_flags |= STA_KEY_FLG_TKIP;
1135                 sta_cmd.key.tkip_rx_tsc_byte2 = tkip_iv32;
1136                 for (i = 0; i < 5; i++)
1137                         sta_cmd.key.tkip_rx_ttak[i] = cpu_to_le16(tkip_p1k[i]);
1138                 memcpy(sta_cmd.key.key, keyconf->key, keyconf->keylen);
1139                 break;
1140         case WLAN_CIPHER_SUITE_WEP104:
1141                 key_flags |= STA_KEY_FLG_KEY_SIZE_MSK;
1142                 /* fall through */
1143         case WLAN_CIPHER_SUITE_WEP40:
1144                 key_flags |= STA_KEY_FLG_WEP;
1145                 memcpy(&sta_cmd.key.key[3], keyconf->key, keyconf->keylen);
1146                 break;
1147         default:
1148                 WARN_ON(1);
1149                 return -EINVAL;
1150         }
1151
1152         if (!(keyconf->flags & IEEE80211_KEY_FLAG_PAIRWISE))
1153                 key_flags |= STA_KEY_MULTICAST_MSK;
1154
1155         /* key pointer (offset) */
1156         sta_cmd.key.key_offset = keyconf->hw_key_idx;
1157
1158         sta_cmd.key.key_flags = key_flags;
1159         sta_cmd.mode = STA_CONTROL_MODIFY_MSK;
1160         sta_cmd.sta.modify_mask = STA_MODIFY_KEY_MASK;
1161
1162         return iwl_send_add_sta(priv, &sta_cmd, cmd_flags);
1163 }
1164
1165 void iwl_update_tkip_key(struct iwl_priv *priv,
1166                          struct ieee80211_vif *vif,
1167                          struct ieee80211_key_conf *keyconf,
1168                          struct ieee80211_sta *sta, u32 iv32, u16 *phase1key)
1169 {
1170         u8 sta_id = iwlagn_key_sta_id(priv, vif, sta);
1171
1172         if (sta_id == IWL_INVALID_STATION)
1173                 return;
1174
1175         if (iwl_scan_cancel(priv)) {
1176                 /* cancel scan failed, just live w/ bad key and rely
1177                    briefly on SW decryption */
1178                 return;
1179         }
1180
1181         iwlagn_send_sta_key(priv, keyconf, sta_id,
1182                             iv32, phase1key, CMD_ASYNC);
1183 }
1184
1185 int iwl_remove_dynamic_key(struct iwl_priv *priv,
1186                            struct iwl_rxon_context *ctx,
1187                            struct ieee80211_key_conf *keyconf,
1188                            struct ieee80211_sta *sta)
1189 {
1190         unsigned long flags;
1191         struct iwl_addsta_cmd sta_cmd;
1192         u8 sta_id = iwlagn_key_sta_id(priv, ctx->vif, sta);
1193         __le16 key_flags;
1194
1195         /* if station isn't there, neither is the key */
1196         if (sta_id == IWL_INVALID_STATION)
1197                 return -ENOENT;
1198
1199         spin_lock_irqsave(&priv->shrd->sta_lock, flags);
1200         memcpy(&sta_cmd, &priv->stations[sta_id].sta, sizeof(sta_cmd));
1201         if (!(priv->stations[sta_id].used & IWL_STA_UCODE_ACTIVE))
1202                 sta_id = IWL_INVALID_STATION;
1203         spin_unlock_irqrestore(&priv->shrd->sta_lock, flags);
1204
1205         if (sta_id == IWL_INVALID_STATION)
1206                 return 0;
1207
1208         lockdep_assert_held(&priv->shrd->mutex);
1209
1210         ctx->key_mapping_keys--;
1211
1212         IWL_DEBUG_WEP(priv, "Remove dynamic key: idx=%d sta=%d\n",
1213                       keyconf->keyidx, sta_id);
1214
1215         if (!test_and_clear_bit(keyconf->hw_key_idx, &priv->ucode_key_table))
1216                 IWL_ERR(priv, "offset %d not used in uCode key table.\n",
1217                         keyconf->hw_key_idx);
1218
1219         key_flags = cpu_to_le16(keyconf->keyidx << STA_KEY_FLG_KEYID_POS);
1220         key_flags |= STA_KEY_FLG_MAP_KEY_MSK | STA_KEY_FLG_NO_ENC |
1221                      STA_KEY_FLG_INVALID;
1222
1223         if (!(keyconf->flags & IEEE80211_KEY_FLAG_PAIRWISE))
1224                 key_flags |= STA_KEY_MULTICAST_MSK;
1225
1226         sta_cmd.key.key_flags = key_flags;
1227         sta_cmd.key.key_offset = WEP_INVALID_OFFSET;
1228         sta_cmd.sta.modify_mask = STA_MODIFY_KEY_MASK;
1229         sta_cmd.mode = STA_CONTROL_MODIFY_MSK;
1230
1231         return iwl_send_add_sta(priv, &sta_cmd, CMD_SYNC);
1232 }
1233
1234 int iwl_set_dynamic_key(struct iwl_priv *priv,
1235                         struct iwl_rxon_context *ctx,
1236                         struct ieee80211_key_conf *keyconf,
1237                         struct ieee80211_sta *sta)
1238 {
1239         struct ieee80211_key_seq seq;
1240         u16 p1k[5];
1241         int ret;
1242         u8 sta_id = iwlagn_key_sta_id(priv, ctx->vif, sta);
1243         const u8 *addr;
1244
1245         if (sta_id == IWL_INVALID_STATION)
1246                 return -EINVAL;
1247
1248         lockdep_assert_held(&priv->shrd->mutex);
1249
1250         keyconf->hw_key_idx = iwl_get_free_ucode_key_offset(priv);
1251         if (keyconf->hw_key_idx == WEP_INVALID_OFFSET)
1252                 return -ENOSPC;
1253
1254         ctx->key_mapping_keys++;
1255
1256         switch (keyconf->cipher) {
1257         case WLAN_CIPHER_SUITE_TKIP:
1258                 if (sta)
1259                         addr = sta->addr;
1260                 else /* station mode case only */
1261                         addr = ctx->active.bssid_addr;
1262
1263                 /* pre-fill phase 1 key into device cache */
1264                 ieee80211_get_key_rx_seq(keyconf, 0, &seq);
1265                 ieee80211_get_tkip_rx_p1k(keyconf, addr, seq.tkip.iv32, p1k);
1266                 ret = iwlagn_send_sta_key(priv, keyconf, sta_id,
1267                                           seq.tkip.iv32, p1k, CMD_SYNC);
1268                 break;
1269         case WLAN_CIPHER_SUITE_CCMP:
1270         case WLAN_CIPHER_SUITE_WEP40:
1271         case WLAN_CIPHER_SUITE_WEP104:
1272                 ret = iwlagn_send_sta_key(priv, keyconf, sta_id,
1273                                           0, NULL, CMD_SYNC);
1274                 break;
1275         default:
1276                 IWL_ERR(priv, "Unknown cipher %x\n", keyconf->cipher);
1277                 ret = -EINVAL;
1278         }
1279
1280         if (ret) {
1281                 ctx->key_mapping_keys--;
1282                 clear_bit(keyconf->hw_key_idx, &priv->ucode_key_table);
1283         }
1284
1285         IWL_DEBUG_WEP(priv, "Set dynamic key: cipher=%x len=%d idx=%d sta=%pM ret=%d\n",
1286                       keyconf->cipher, keyconf->keylen, keyconf->keyidx,
1287                       sta ? sta->addr : NULL, ret);
1288
1289         return ret;
1290 }
1291
1292 /**
1293  * iwlagn_alloc_bcast_station - add broadcast station into driver's station table.
1294  *
1295  * This adds the broadcast station into the driver's station table
1296  * and marks it driver active, so that it will be restored to the
1297  * device at the next best time.
1298  */
1299 int iwlagn_alloc_bcast_station(struct iwl_priv *priv,
1300                                struct iwl_rxon_context *ctx)
1301 {
1302         struct iwl_link_quality_cmd *link_cmd;
1303         unsigned long flags;
1304         u8 sta_id;
1305
1306         spin_lock_irqsave(&priv->shrd->sta_lock, flags);
1307         sta_id = iwl_prep_station(priv, ctx, iwl_bcast_addr, false, NULL);
1308         if (sta_id == IWL_INVALID_STATION) {
1309                 IWL_ERR(priv, "Unable to prepare broadcast station\n");
1310                 spin_unlock_irqrestore(&priv->shrd->sta_lock, flags);
1311
1312                 return -EINVAL;
1313         }
1314
1315         priv->stations[sta_id].used |= IWL_STA_DRIVER_ACTIVE;
1316         priv->stations[sta_id].used |= IWL_STA_BCAST;
1317         spin_unlock_irqrestore(&priv->shrd->sta_lock, flags);
1318
1319         link_cmd = iwl_sta_alloc_lq(priv, ctx, sta_id);
1320         if (!link_cmd) {
1321                 IWL_ERR(priv,
1322                         "Unable to initialize rate scaling for bcast station.\n");
1323                 return -ENOMEM;
1324         }
1325
1326         spin_lock_irqsave(&priv->shrd->sta_lock, flags);
1327         priv->stations[sta_id].lq = link_cmd;
1328         spin_unlock_irqrestore(&priv->shrd->sta_lock, flags);
1329
1330         return 0;
1331 }
1332
1333 /**
1334  * iwl_update_bcast_station - update broadcast station's LQ command
1335  *
1336  * Only used by iwlagn. Placed here to have all bcast station management
1337  * code together.
1338  */
1339 int iwl_update_bcast_station(struct iwl_priv *priv,
1340                              struct iwl_rxon_context *ctx)
1341 {
1342         unsigned long flags;
1343         struct iwl_link_quality_cmd *link_cmd;
1344         u8 sta_id = ctx->bcast_sta_id;
1345
1346         link_cmd = iwl_sta_alloc_lq(priv, ctx, sta_id);
1347         if (!link_cmd) {
1348                 IWL_ERR(priv, "Unable to initialize rate scaling for bcast station.\n");
1349                 return -ENOMEM;
1350         }
1351
1352         spin_lock_irqsave(&priv->shrd->sta_lock, flags);
1353         if (priv->stations[sta_id].lq)
1354                 kfree(priv->stations[sta_id].lq);
1355         else
1356                 IWL_DEBUG_INFO(priv, "Bcast station rate scaling has not been initialized yet.\n");
1357         priv->stations[sta_id].lq = link_cmd;
1358         spin_unlock_irqrestore(&priv->shrd->sta_lock, flags);
1359
1360         return 0;
1361 }
1362
1363 int iwl_update_bcast_stations(struct iwl_priv *priv)
1364 {
1365         struct iwl_rxon_context *ctx;
1366         int ret = 0;
1367
1368         for_each_context(priv, ctx) {
1369                 ret = iwl_update_bcast_station(priv, ctx);
1370                 if (ret)
1371                         break;
1372         }
1373
1374         return ret;
1375 }
1376
1377 /**
1378  * iwl_sta_tx_modify_enable_tid - Enable Tx for this TID in station table
1379  */
1380 int iwl_sta_tx_modify_enable_tid(struct iwl_priv *priv, int sta_id, int tid)
1381 {
1382         unsigned long flags;
1383         struct iwl_addsta_cmd sta_cmd;
1384
1385         lockdep_assert_held(&priv->shrd->mutex);
1386
1387         /* Remove "disable" flag, to enable Tx for this TID */
1388         spin_lock_irqsave(&priv->shrd->sta_lock, flags);
1389         priv->stations[sta_id].sta.sta.modify_mask = STA_MODIFY_TID_DISABLE_TX;
1390         priv->stations[sta_id].sta.tid_disable_tx &= cpu_to_le16(~(1 << tid));
1391         priv->stations[sta_id].sta.mode = STA_CONTROL_MODIFY_MSK;
1392         memcpy(&sta_cmd, &priv->stations[sta_id].sta, sizeof(struct iwl_addsta_cmd));
1393         spin_unlock_irqrestore(&priv->shrd->sta_lock, flags);
1394
1395         return iwl_send_add_sta(priv, &sta_cmd, CMD_SYNC);
1396 }
1397
1398 int iwl_sta_rx_agg_start(struct iwl_priv *priv, struct ieee80211_sta *sta,
1399                          int tid, u16 ssn)
1400 {
1401         unsigned long flags;
1402         int sta_id;
1403         struct iwl_addsta_cmd sta_cmd;
1404
1405         lockdep_assert_held(&priv->shrd->mutex);
1406
1407         sta_id = iwl_sta_id(sta);
1408         if (sta_id == IWL_INVALID_STATION)
1409                 return -ENXIO;
1410
1411         spin_lock_irqsave(&priv->shrd->sta_lock, flags);
1412         priv->stations[sta_id].sta.station_flags_msk = 0;
1413         priv->stations[sta_id].sta.sta.modify_mask = STA_MODIFY_ADDBA_TID_MSK;
1414         priv->stations[sta_id].sta.add_immediate_ba_tid = (u8)tid;
1415         priv->stations[sta_id].sta.add_immediate_ba_ssn = cpu_to_le16(ssn);
1416         priv->stations[sta_id].sta.mode = STA_CONTROL_MODIFY_MSK;
1417         memcpy(&sta_cmd, &priv->stations[sta_id].sta, sizeof(struct iwl_addsta_cmd));
1418         spin_unlock_irqrestore(&priv->shrd->sta_lock, flags);
1419
1420         return iwl_send_add_sta(priv, &sta_cmd, CMD_SYNC);
1421 }
1422
1423 int iwl_sta_rx_agg_stop(struct iwl_priv *priv, struct ieee80211_sta *sta,
1424                         int tid)
1425 {
1426         unsigned long flags;
1427         int sta_id;
1428         struct iwl_addsta_cmd sta_cmd;
1429
1430         lockdep_assert_held(&priv->shrd->mutex);
1431
1432         sta_id = iwl_sta_id(sta);
1433         if (sta_id == IWL_INVALID_STATION) {
1434                 IWL_ERR(priv, "Invalid station for AGG tid %d\n", tid);
1435                 return -ENXIO;
1436         }
1437
1438         spin_lock_irqsave(&priv->shrd->sta_lock, flags);
1439         priv->stations[sta_id].sta.station_flags_msk = 0;
1440         priv->stations[sta_id].sta.sta.modify_mask = STA_MODIFY_DELBA_TID_MSK;
1441         priv->stations[sta_id].sta.remove_immediate_ba_tid = (u8)tid;
1442         priv->stations[sta_id].sta.mode = STA_CONTROL_MODIFY_MSK;
1443         memcpy(&sta_cmd, &priv->stations[sta_id].sta, sizeof(struct iwl_addsta_cmd));
1444         spin_unlock_irqrestore(&priv->shrd->sta_lock, flags);
1445
1446         return iwl_send_add_sta(priv, &sta_cmd, CMD_SYNC);
1447 }
1448
1449
1450
1451 void iwl_sta_modify_sleep_tx_count(struct iwl_priv *priv, int sta_id, int cnt)
1452 {
1453         unsigned long flags;
1454
1455         spin_lock_irqsave(&priv->shrd->sta_lock, flags);
1456         priv->stations[sta_id].sta.station_flags |= STA_FLG_PWR_SAVE_MSK;
1457         priv->stations[sta_id].sta.station_flags_msk = STA_FLG_PWR_SAVE_MSK;
1458         priv->stations[sta_id].sta.sta.modify_mask =
1459                                         STA_MODIFY_SLEEP_TX_COUNT_MSK;
1460         priv->stations[sta_id].sta.sleep_tx_count = cpu_to_le16(cnt);
1461         priv->stations[sta_id].sta.mode = STA_CONTROL_MODIFY_MSK;
1462         iwl_send_add_sta(priv, &priv->stations[sta_id].sta, CMD_ASYNC);
1463         spin_unlock_irqrestore(&priv->shrd->sta_lock, flags);
1464
1465 }