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

   1 /******************************************************************************
   2  *
   3  * Copyright(c) 2003 - 2011 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 void iwl_sta_ucode_activate(struct iwl_priv *priv, u8 sta_id)
  39 {
  40
  41         if (!(priv->stations[sta_id].used & IWL_STA_DRIVER_ACTIVE))
  42                 IWL_ERR(priv, "ACTIVATE a non DRIVER active station id %u "
  43                         "addr %pM\n",
  44                         sta_id, priv->stations[sta_id].sta.sta.addr);
  45
  46         if (priv->stations[sta_id].used & IWL_STA_UCODE_ACTIVE) {
  47                 IWL_DEBUG_ASSOC(priv,
  48                                 "STA id %u addr %pM already present in uCode "
  49                                 "(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 {
  62         u8 sta_id = addsta->sta.sta_id;
  63         unsigned long flags;
  64         int ret = -EIO;
  65
  66         if (pkt->hdr.flags & IWL_CMD_FAILED_MSK) {
  67                 IWL_ERR(priv, "Bad return from REPLY_ADD_STA (0x%08X)\n",
  68                         pkt->hdr.flags);
  69                 return ret;
  70         }
  71
  72         IWL_DEBUG_INFO(priv, "Processing response for adding station %u\n",
  73                        sta_id);
  74
  75         spin_lock_irqsave(&priv->shrd->sta_lock, flags);
  76
  77         switch (pkt->u.add_sta.status) {
  78         case ADD_STA_SUCCESS_MSK:
  79                 IWL_DEBUG_INFO(priv, "REPLY_ADD_STA PASSED\n");
  80                 iwl_sta_ucode_activate(priv, sta_id);
  81                 ret = 0;
  82                 break;
  83         case ADD_STA_NO_ROOM_IN_TABLE:
  84                 IWL_ERR(priv, "Adding station %d failed, no room in table.\n",
  85                         sta_id);
  86                 break;
  87         case ADD_STA_NO_BLOCK_ACK_RESOURCE:
  88                 IWL_ERR(priv, "Adding station %d failed, no block ack "
  89                         "resource.\n", sta_id);
  90                 break;
  91         case ADD_STA_MODIFY_NON_EXIST_STA:
  92                 IWL_ERR(priv, "Attempting to modify non-existing station %d\n",
  93                         sta_id);
  94                 break;
  95         default:
  96                 IWL_DEBUG_ASSOC(priv, "Received REPLY_ADD_STA:(0x%08X)\n",
  97                                 pkt->u.add_sta.status);
  98                 break;
  99         }
 100
 101         IWL_DEBUG_INFO(priv, "%s station id %u addr %pM\n",
 102                        priv->stations[sta_id].sta.mode ==
 103                        STA_CONTROL_MODIFY_MSK ?  "Modified" : "Added",
 104                        sta_id, priv->stations[sta_id].sta.sta.addr);
 105
 106         /*
 107          * XXX: The MAC address in the command buffer is often changed from
 108          * the original sent to the device. That is, the MAC address
 109          * written to the command buffer often is not the same MAC address
 110          * read from the command buffer when the command returns. This
 111          * issue has not yet been resolved and this debugging is left to
 112          * observe the problem.
 113          */
 114         IWL_DEBUG_INFO(priv, "%s station according to cmd buffer %pM\n",
 115                        priv->stations[sta_id].sta.mode ==
 116                        STA_CONTROL_MODIFY_MSK ? "Modified" : "Added",
 117                        addsta->sta.addr);
 118         spin_unlock_irqrestore(&priv->shrd->sta_lock, flags);
 119
 120         return ret;
 121 }
 122
 123 int iwl_add_sta_callback(struct iwl_priv *priv, struct iwl_rx_mem_buffer *rxb,
 124                                struct iwl_device_cmd *cmd)
 125 {
 126         struct iwl_rx_packet *pkt = rxb_addr(rxb);
 127         struct iwl_addsta_cmd *addsta =
 128                 (struct iwl_addsta_cmd *) cmd->payload;
 129
 130         return iwl_process_add_sta_resp(priv, addsta, pkt);
 131 }
 132
 133 static u16 iwlagn_build_addsta_hcmd(const struct iwl_addsta_cmd *cmd, u8 *data)
 134 {
 135         u16 size = (u16)sizeof(struct iwl_addsta_cmd);
 136         struct iwl_addsta_cmd *addsta = (struct iwl_addsta_cmd *)data;
 137         memcpy(addsta, cmd, size);
 138         /* resrved in 5000 */
 139         addsta->rate_n_flags = cpu_to_le16(0);
 140         return size;
 141 }
 142
 143 int iwl_send_add_sta(struct iwl_priv *priv,
 144                      struct iwl_addsta_cmd *sta, u8 flags)
 145 {
 146         int ret = 0;
 147         u8 data[sizeof(*sta)];
 148         struct iwl_host_cmd cmd = {
 149                 .id = REPLY_ADD_STA,
 150                 .flags = flags,
 151                 .data = { data, },
 152         };
 153         u8 sta_id __maybe_unused = sta->sta.sta_id;
 154
 155         IWL_DEBUG_INFO(priv, "Adding sta %u (%pM) %ssynchronously\n",
 156                        sta_id, sta->sta.addr, flags & CMD_ASYNC ?  "a" : "");
 157
 158         if (!(flags & CMD_ASYNC)) {
 159                 cmd.flags |= CMD_WANT_SKB;
 160                 might_sleep();
 161         }
 162
 163         cmd.len[0] = iwlagn_build_addsta_hcmd(sta, data);
 164         ret = iwl_trans_send_cmd(trans(priv), &cmd);
 165
 166         if (ret || (flags & CMD_ASYNC))
 167                 return ret;
 168         /*else the command was successfully sent in SYNC mode, need to free
 169          * the reply page */
 170
 171         iwl_free_pages(priv->shrd, cmd.reply_page);
 172
 173         if (cmd.handler_status)
 174                 IWL_ERR(priv, "%s - error in the CMD response %d", __func__,
 175                         cmd.handler_status);
 176
 177         return cmd.handler_status;
 178 }
 179
 180 static void iwl_set_ht_add_station(struct iwl_priv *priv, u8 index,
 181                                    struct ieee80211_sta *sta,
 182                                    struct iwl_rxon_context *ctx)
 183 {
 184         struct ieee80211_sta_ht_cap *sta_ht_inf = &sta->ht_cap;
 185         __le32 sta_flags;
 186         u8 mimo_ps_mode;
 187
 188         if (!sta || !sta_ht_inf->ht_supported)
 189                 goto done;
 190
 191         mimo_ps_mode = (sta_ht_inf->cap & IEEE80211_HT_CAP_SM_PS) >> 2;
 192         IWL_DEBUG_ASSOC(priv, "spatial multiplexing power save mode: %s\n",
 193                         (mimo_ps_mode == WLAN_HT_CAP_SM_PS_STATIC) ?
 194                         "static" :
 195                         (mimo_ps_mode == WLAN_HT_CAP_SM_PS_DYNAMIC) ?
 196                         "dynamic" : "disabled");
 197
 198         sta_flags = priv->stations[index].sta.station_flags;
 199
 200         sta_flags &= ~(STA_FLG_RTS_MIMO_PROT_MSK | STA_FLG_MIMO_DIS_MSK);
 201
 202         switch (mimo_ps_mode) {
 203         case WLAN_HT_CAP_SM_PS_STATIC:
 204                 sta_flags |= STA_FLG_MIMO_DIS_MSK;
 205                 break;
 206         case WLAN_HT_CAP_SM_PS_DYNAMIC:
 207                 sta_flags |= STA_FLG_RTS_MIMO_PROT_MSK;
 208                 break;
 209         case WLAN_HT_CAP_SM_PS_DISABLED:
 210                 break;
 211         default:
 212                 IWL_WARN(priv, "Invalid MIMO PS mode %d\n", mimo_ps_mode);
 213                 break;
 214         }
 215
 216         sta_flags |= cpu_to_le32(
 217               (u32)sta_ht_inf->ampdu_factor << STA_FLG_MAX_AGG_SIZE_POS);
 218
 219         sta_flags |= cpu_to_le32(
 220               (u32)sta_ht_inf->ampdu_density << STA_FLG_AGG_MPDU_DENSITY_POS);
 221
 222         if (iwl_is_ht40_tx_allowed(priv, ctx, &sta->ht_cap))
 223                 sta_flags |= STA_FLG_HT40_EN_MSK;
 224         else
 225                 sta_flags &= ~STA_FLG_HT40_EN_MSK;
 226
 227         priv->stations[index].sta.station_flags = sta_flags;
 228  done:
 229         return;
 230 }
 231
 232 /**
 233  * iwl_prep_station - Prepare station information for addition
 234  *
 235  * should be called with sta_lock held
 236  */
 237 u8 iwl_prep_station(struct iwl_priv *priv, struct iwl_rxon_context *ctx,
 238                     const u8 *addr, bool is_ap, struct ieee80211_sta *sta)
 239 {
 240         struct iwl_station_entry *station;
 241         int i;
 242         u8 sta_id = IWL_INVALID_STATION;
 243
 244         if (is_ap)
 245                 sta_id = ctx->ap_sta_id;
 246         else if (is_broadcast_ether_addr(addr))
 247                 sta_id = ctx->bcast_sta_id;
 248         else
 249                 for (i = IWL_STA_ID; i < IWLAGN_STATION_COUNT; i++) {
 250                         if (!compare_ether_addr(priv->stations[i].sta.sta.addr,
 251                                                 addr)) {
 252                                 sta_id = i;
 253                                 break;
 254                         }
 255
 256                         if (!priv->stations[i].used &&
 257                             sta_id == IWL_INVALID_STATION)
 258                                 sta_id = i;
 259                 }
 260
 261         /*
 262          * These two conditions have the same outcome, but keep them
 263          * separate
 264          */
 265         if (unlikely(sta_id == IWL_INVALID_STATION))
 266                 return sta_id;
 267
 268         /*
 269          * uCode is not able to deal with multiple requests to add a
 270          * station. Keep track if one is in progress so that we do not send
 271          * another.
 272          */
 273         if (priv->stations[sta_id].used & IWL_STA_UCODE_INPROGRESS) {
 274                 IWL_DEBUG_INFO(priv, "STA %d already in process of being "
 275                                "added.\n", sta_id);
 276                 return sta_id;
 277         }
 278
 279         if ((priv->stations[sta_id].used & IWL_STA_DRIVER_ACTIVE) &&
 280             (priv->stations[sta_id].used & IWL_STA_UCODE_ACTIVE) &&
 281             !compare_ether_addr(priv->stations[sta_id].sta.sta.addr, addr)) {
 282                 IWL_DEBUG_ASSOC(priv, "STA %d (%pM) already added, not "
 283                                 "adding again.\n", sta_id, addr);
 284                 return sta_id;
 285         }
 286
 287         station = &priv->stations[sta_id];
 288         station->used = IWL_STA_DRIVER_ACTIVE;
 289         IWL_DEBUG_ASSOC(priv, "Add STA to driver ID %d: %pM\n",
 290                         sta_id, addr);
 291         priv->num_stations++;
 292
 293         /* Set up the REPLY_ADD_STA command to send to device */
 294         memset(&station->sta, 0, sizeof(struct iwl_addsta_cmd));
 295         memcpy(station->sta.sta.addr, addr, ETH_ALEN);
 296         station->sta.mode = 0;
 297         station->sta.sta.sta_id = sta_id;
 298         station->sta.station_flags = ctx->station_flags;
 299         station->ctxid = ctx->ctxid;
 300
 301         if (sta) {
 302                 struct iwl_station_priv *sta_priv;
 303
 304                 sta_priv = (void *)sta->drv_priv;
 305                 sta_priv->ctx = ctx;
 306         }
 307
 308         /*
 309          * OK to call unconditionally, since local stations (IBSS BSSID
 310          * STA and broadcast STA) pass in a NULL sta, and mac80211
 311          * doesn't allow HT IBSS.
 312          */
 313         iwl_set_ht_add_station(priv, sta_id, sta, ctx);
 314
 315         return sta_id;
 316
 317 }
 318
 319 #define STA_WAIT_TIMEOUT (HZ/2)
 320
 321 /**
 322  * iwl_add_station_common -
 323  */
 324 int iwl_add_station_common(struct iwl_priv *priv, struct iwl_rxon_context *ctx,
 325                            const u8 *addr, bool is_ap,
 326                            struct ieee80211_sta *sta, u8 *sta_id_r)
 327 {
 328         unsigned long flags_spin;
 329         int ret = 0;
 330         u8 sta_id;
 331         struct iwl_addsta_cmd sta_cmd;
 332
 333         *sta_id_r = 0;
 334         spin_lock_irqsave(&priv->shrd->sta_lock, flags_spin);
 335         sta_id = iwl_prep_station(priv, ctx, addr, is_ap, sta);
 336         if (sta_id == IWL_INVALID_STATION) {
 337                 IWL_ERR(priv, "Unable to prepare station %pM for addition\n",
 338                         addr);
 339                 spin_unlock_irqrestore(&priv->shrd->sta_lock, flags_spin);
 340                 return -EINVAL;
 341         }
 342
 343         /*
 344          * uCode is not able to deal with multiple requests to add a
 345          * station. Keep track if one is in progress so that we do not send
 346          * another.
 347          */
 348         if (priv->stations[sta_id].used & IWL_STA_UCODE_INPROGRESS) {
 349                 IWL_DEBUG_INFO(priv, "STA %d already in process of being "
 350                                "added.\n", sta_id);
 351                 spin_unlock_irqrestore(&priv->shrd->sta_lock, flags_spin);
 352                 return -EEXIST;
 353         }
 354
 355         if ((priv->stations[sta_id].used & IWL_STA_DRIVER_ACTIVE) &&
 356             (priv->stations[sta_id].used & IWL_STA_UCODE_ACTIVE)) {
 357                 IWL_DEBUG_ASSOC(priv, "STA %d (%pM) already added, not "
 358                                 "adding again.\n", sta_id, addr);
 359                 spin_unlock_irqrestore(&priv->shrd->sta_lock, flags_spin);
 360                 return -EEXIST;
 361         }
 362
 363         priv->stations[sta_id].used |= IWL_STA_UCODE_INPROGRESS;
 364         memcpy(&sta_cmd, &priv->stations[sta_id].sta,
 365                sizeof(struct iwl_addsta_cmd));
 366         spin_unlock_irqrestore(&priv->shrd->sta_lock, flags_spin);
 367
 368         /* Add station to device's station table */
 369         ret = iwl_send_add_sta(priv, &sta_cmd, CMD_SYNC);
 370         if (ret) {
 371                 spin_lock_irqsave(&priv->shrd->sta_lock, flags_spin);
 372                 IWL_ERR(priv, "Adding station %pM failed.\n",
 373                         priv->stations[sta_id].sta.sta.addr);
 374                 priv->stations[sta_id].used &= ~IWL_STA_DRIVER_ACTIVE;
 375                 priv->stations[sta_id].used &= ~IWL_STA_UCODE_INPROGRESS;
 376                 spin_unlock_irqrestore(&priv->shrd->sta_lock, flags_spin);
 377         }
 378         *sta_id_r = sta_id;
 379         return ret;
 380 }
 381
 382 /**
 383  * iwl_sta_ucode_deactivate - deactivate ucode status for a station
 384  *
 385  * priv->shrd->sta_lock must be held
 386  */
 387 static void iwl_sta_ucode_deactivate(struct iwl_priv *priv, u8 sta_id)
 388 {
 389         /* Ucode must be active and driver must be non active */
 390         if ((priv->stations[sta_id].used &
 391              (IWL_STA_UCODE_ACTIVE | IWL_STA_DRIVER_ACTIVE)) !=
 392               IWL_STA_UCODE_ACTIVE)
 393                 IWL_ERR(priv, "removed non active STA %u\n", sta_id);
 394
 395         priv->stations[sta_id].used &= ~IWL_STA_UCODE_ACTIVE;
 396
 397         memset(&priv->stations[sta_id], 0, sizeof(struct iwl_station_entry));
 398         IWL_DEBUG_ASSOC(priv, "Removed STA %u\n", sta_id);
 399 }
 400
 401 static int iwl_send_remove_station(struct iwl_priv *priv,
 402                                    const u8 *addr, int sta_id,
 403                                    bool temporary)
 404 {
 405         struct iwl_rx_packet *pkt;
 406         int ret;
 407
 408         unsigned long flags_spin;
 409         struct iwl_rem_sta_cmd rm_sta_cmd;
 410
 411         struct iwl_host_cmd cmd = {
 412                 .id = REPLY_REMOVE_STA,
 413                 .len = { sizeof(struct iwl_rem_sta_cmd), },
 414                 .flags = CMD_SYNC,
 415                 .data = { &rm_sta_cmd, },
 416         };
 417
 418         memset(&rm_sta_cmd, 0, sizeof(rm_sta_cmd));
 419         rm_sta_cmd.num_sta = 1;
 420         memcpy(&rm_sta_cmd.addr, addr, ETH_ALEN);
 421
 422         cmd.flags |= CMD_WANT_SKB;
 423
 424         ret = iwl_trans_send_cmd(trans(priv), &cmd);
 425
 426         if (ret)
 427                 return ret;
 428
 429         pkt = (struct iwl_rx_packet *)cmd.reply_page;
 430         if (pkt->hdr.flags & IWL_CMD_FAILED_MSK) {
 431                 IWL_ERR(priv, "Bad return from REPLY_REMOVE_STA (0x%08X)\n",
 432                           pkt->hdr.flags);
 433                 ret = -EIO;
 434         }
 435
 436         if (!ret) {
 437                 switch (pkt->u.rem_sta.status) {
 438                 case REM_STA_SUCCESS_MSK:
 439                         if (!temporary) {
 440                                 spin_lock_irqsave(&priv->shrd->sta_lock,
 441                                         flags_spin);
 442                                 iwl_sta_ucode_deactivate(priv, sta_id);
 443                                 spin_unlock_irqrestore(&priv->shrd->sta_lock,
 444                                         flags_spin);
 445                         }
 446                         IWL_DEBUG_ASSOC(priv, "REPLY_REMOVE_STA PASSED\n");
 447                         break;
 448                 default:
 449                         ret = -EIO;
 450                         IWL_ERR(priv, "REPLY_REMOVE_STA failed\n");
 451                         break;
 452                 }
 453         }
 454         iwl_free_pages(priv->shrd, cmd.reply_page);
 455
 456         return ret;
 457 }
 458
 459 /**
 460  * iwl_remove_station - Remove driver's knowledge of station.
 461  */
 462 int iwl_remove_station(struct iwl_priv *priv, const u8 sta_id,
 463                        const u8 *addr)
 464 {
 465         unsigned long flags;
 466
 467         if (!iwl_is_ready(priv->shrd)) {
 468                 IWL_DEBUG_INFO(priv,
 469                         "Unable to remove station %pM, device not ready.\n",
 470                         addr);
 471                 /*
 472                  * It is typical for stations to be removed when we are
 473                  * going down. Return success since device will be down
 474                  * soon anyway
 475                  */
 476                 return 0;
 477         }
 478
 479         IWL_DEBUG_ASSOC(priv, "Removing STA from driver:%d  %pM\n",
 480                         sta_id, addr);
 481
 482         if (WARN_ON(sta_id == IWL_INVALID_STATION))
 483                 return -EINVAL;
 484
 485         spin_lock_irqsave(&priv->shrd->sta_lock, flags);
 486
 487         if (!(priv->stations[sta_id].used & IWL_STA_DRIVER_ACTIVE)) {
 488                 IWL_DEBUG_INFO(priv, "Removing %pM but non DRIVER active\n",
 489                                 addr);
 490                 goto out_err;
 491         }
 492
 493         if (!(priv->stations[sta_id].used & IWL_STA_UCODE_ACTIVE)) {
 494                 IWL_DEBUG_INFO(priv, "Removing %pM but non UCODE active\n",
 495                                 addr);
 496                 goto out_err;
 497         }
 498
 499         if (priv->stations[sta_id].used & IWL_STA_LOCAL) {
 500                 kfree(priv->stations[sta_id].lq);
 501                 priv->stations[sta_id].lq = NULL;
 502         }
 503
 504         priv->stations[sta_id].used &= ~IWL_STA_DRIVER_ACTIVE;
 505
 506         priv->num_stations--;
 507
 508         if (WARN_ON(priv->num_stations < 0))
 509                 priv->num_stations = 0;
 510
 511         spin_unlock_irqrestore(&priv->shrd->sta_lock, flags);
 512
 513         return iwl_send_remove_station(priv, addr, sta_id, false);
 514 out_err:
 515         spin_unlock_irqrestore(&priv->shrd->sta_lock, flags);
 516         return -EINVAL;
 517 }
 518
 519 /**
 520  * iwl_clear_ucode_stations - clear ucode station table bits
 521  *
 522  * This function clears all the bits in the driver indicating
 523  * which stations are active in the ucode. Call when something
 524  * other than explicit station management would cause this in
 525  * the ucode, e.g. unassociated RXON.
 526  */
 527 void iwl_clear_ucode_stations(struct iwl_priv *priv,
 528                               struct iwl_rxon_context *ctx)
 529 {
 530         int i;
 531         unsigned long flags_spin;
 532         bool cleared = false;
 533
 534         IWL_DEBUG_INFO(priv, "Clearing ucode stations in driver\n");
 535
 536         spin_lock_irqsave(&priv->shrd->sta_lock, flags_spin);
 537         for (i = 0; i < IWLAGN_STATION_COUNT; i++) {
 538                 if (ctx && ctx->ctxid != priv->stations[i].ctxid)
 539                         continue;
 540
 541                 if (priv->stations[i].used & IWL_STA_UCODE_ACTIVE) {
 542                         IWL_DEBUG_INFO(priv,
 543                                 "Clearing ucode active for station %d\n", i);
 544                         priv->stations[i].used &= ~IWL_STA_UCODE_ACTIVE;
 545                         cleared = true;
 546                 }
 547         }
 548         spin_unlock_irqrestore(&priv->shrd->sta_lock, flags_spin);
 549
 550         if (!cleared)
 551                 IWL_DEBUG_INFO(priv,
 552                                "No active stations found to be cleared\n");
 553 }
 554
 555 /**
 556  * iwl_restore_stations() - Restore driver known stations to device
 557  *
 558  * All stations considered active by driver, but not present in ucode, is
 559  * restored.
 560  *
 561  * Function sleeps.
 562  */
 563 void iwl_restore_stations(struct iwl_priv *priv, struct iwl_rxon_context *ctx)
 564 {
 565         struct iwl_addsta_cmd sta_cmd;
 566         struct iwl_link_quality_cmd lq;
 567         unsigned long flags_spin;
 568         int i;
 569         bool found = false;
 570         int ret;
 571         bool send_lq;
 572
 573         if (!iwl_is_ready(priv->shrd)) {
 574                 IWL_DEBUG_INFO(priv,
 575                                "Not ready yet, not restoring any stations.\n");
 576                 return;
 577         }
 578
 579         IWL_DEBUG_ASSOC(priv, "Restoring all known stations ... start.\n");
 580         spin_lock_irqsave(&priv->shrd->sta_lock, flags_spin);
 581         for (i = 0; i < IWLAGN_STATION_COUNT; i++) {
 582                 if (ctx->ctxid != priv->stations[i].ctxid)
 583                         continue;
 584                 if ((priv->stations[i].used & IWL_STA_DRIVER_ACTIVE) &&
 585                             !(priv->stations[i].used & IWL_STA_UCODE_ACTIVE)) {
 586                         IWL_DEBUG_ASSOC(priv, "Restoring sta %pM\n",
 587                                         priv->stations[i].sta.sta.addr);
 588                         priv->stations[i].sta.mode = 0;
 589                         priv->stations[i].used |= IWL_STA_UCODE_INPROGRESS;
 590                         found = true;
 591                 }
 592         }
 593
 594         for (i = 0; i < IWLAGN_STATION_COUNT; i++) {
 595                 if ((priv->stations[i].used & IWL_STA_UCODE_INPROGRESS)) {
 596                         memcpy(&sta_cmd, &priv->stations[i].sta,
 597                                sizeof(struct iwl_addsta_cmd));
 598                         send_lq = false;
 599                         if (priv->stations[i].lq) {
 600                                 if (priv->shrd->wowlan)
 601                                         iwl_sta_fill_lq(priv, ctx, i, &lq);
 602                                 else
 603                                         memcpy(&lq, priv->stations[i].lq,
 604                                                sizeof(struct iwl_link_quality_cmd));
 605                                 send_lq = true;
 606                         }
 607                         spin_unlock_irqrestore(&priv->shrd->sta_lock,
 608                                                flags_spin);
 609                         ret = iwl_send_add_sta(priv, &sta_cmd, CMD_SYNC);
 610                         if (ret) {
 611                                 spin_lock_irqsave(&priv->shrd->sta_lock,
 612                                                   flags_spin);
 613                                 IWL_ERR(priv, "Adding station %pM failed.\n",
 614                                         priv->stations[i].sta.sta.addr);
 615                                 priv->stations[i].used &=
 616                                                 ~IWL_STA_DRIVER_ACTIVE;
 617                                 priv->stations[i].used &=
 618                                                 ~IWL_STA_UCODE_INPROGRESS;
 619                                 spin_unlock_irqrestore(&priv->shrd->sta_lock,
 620                                                        flags_spin);
 621                         }
 622                         /*
 623                          * Rate scaling has already been initialized, send
 624                          * current LQ command
 625                          */
 626                         if (send_lq)
 627                                 iwl_send_lq_cmd(priv, ctx, &lq,
 628                                                 CMD_SYNC, true);
 629                         spin_lock_irqsave(&priv->shrd->sta_lock, flags_spin);
 630                         priv->stations[i].used &= ~IWL_STA_UCODE_INPROGRESS;
 631                 }
 632         }
 633
 634         spin_unlock_irqrestore(&priv->shrd->sta_lock, flags_spin);
 635         if (!found)
 636                 IWL_DEBUG_INFO(priv, "Restoring all known stations .... "
 637                         "no stations to be restored.\n");
 638         else
 639                 IWL_DEBUG_INFO(priv, "Restoring all known stations .... "
 640                         "complete.\n");
 641 }
 642
 643 void iwl_reprogram_ap_sta(struct iwl_priv *priv, struct iwl_rxon_context *ctx)
 644 {
 645         unsigned long flags;
 646         int sta_id = ctx->ap_sta_id;
 647         int ret;
 648         struct iwl_addsta_cmd sta_cmd;
 649         struct iwl_link_quality_cmd lq;
 650         bool active, have_lq = false;
 651
 652         spin_lock_irqsave(&priv->shrd->sta_lock, flags);
 653         if (!(priv->stations[sta_id].used & IWL_STA_DRIVER_ACTIVE)) {
 654                 spin_unlock_irqrestore(&priv->shrd->sta_lock, flags);
 655                 return;
 656         }
 657
 658         memcpy(&sta_cmd, &priv->stations[sta_id].sta, sizeof(sta_cmd));
 659         sta_cmd.mode = 0;
 660         if (priv->stations[sta_id].lq) {
 661                 memcpy(&lq, priv->stations[sta_id].lq, sizeof(lq));
 662                 have_lq = true;
 663         }
 664
 665         active = priv->stations[sta_id].used & IWL_STA_UCODE_ACTIVE;
 666         priv->stations[sta_id].used &= ~IWL_STA_DRIVER_ACTIVE;
 667         spin_unlock_irqrestore(&priv->shrd->sta_lock, flags);
 668
 669         if (active) {
 670                 ret = iwl_send_remove_station(
 671                         priv, priv->stations[sta_id].sta.sta.addr,
 672                         sta_id, true);
 673                 if (ret)
 674                         IWL_ERR(priv, "failed to remove STA %pM (%d)\n",
 675                                 priv->stations[sta_id].sta.sta.addr, ret);
 676         }
 677         spin_lock_irqsave(&priv->shrd->sta_lock, flags);
 678         priv->stations[sta_id].used |= IWL_STA_DRIVER_ACTIVE;
 679         spin_unlock_irqrestore(&priv->shrd->sta_lock, flags);
 680
 681         ret = iwl_send_add_sta(priv, &sta_cmd, CMD_SYNC);
 682         if (ret)
 683                 IWL_ERR(priv, "failed to re-add STA %pM (%d)\n",
 684                         priv->stations[sta_id].sta.sta.addr, ret);
 685         if (have_lq)
 686                 iwl_send_lq_cmd(priv, ctx, &lq, CMD_SYNC, true);
 687 }
 688
 689 int iwl_get_free_ucode_key_offset(struct iwl_priv *priv)
 690 {
 691         int i;
 692
 693         for (i = 0; i < priv->sta_key_max_num; i++)
 694                 if (!test_and_set_bit(i, &priv->ucode_key_table))
 695                         return i;
 696
 697         return WEP_INVALID_OFFSET;
 698 }
 699
 700 void iwl_dealloc_bcast_stations(struct iwl_priv *priv)
 701 {
 702         unsigned long flags;
 703         int i;
 704
 705         spin_lock_irqsave(&priv->shrd->sta_lock, flags);
 706         for (i = 0; i < IWLAGN_STATION_COUNT; i++) {
 707                 if (!(priv->stations[i].used & IWL_STA_BCAST))
 708                         continue;
 709
 710                 priv->stations[i].used &= ~IWL_STA_UCODE_ACTIVE;
 711                 priv->num_stations--;
 712                 if (WARN_ON(priv->num_stations < 0))
 713                         priv->num_stations = 0;
 714                 kfree(priv->stations[i].lq);
 715                 priv->stations[i].lq = NULL;
 716         }
 717         spin_unlock_irqrestore(&priv->shrd->sta_lock, flags);
 718 }
 719
 720 #ifdef CONFIG_IWLWIFI_DEBUG
 721 static void iwl_dump_lq_cmd(struct iwl_priv *priv,
 722                            struct iwl_link_quality_cmd *lq)
 723 {
 724         int i;
 725         IWL_DEBUG_RATE(priv, "lq station id 0x%x\n", lq->sta_id);
 726         IWL_DEBUG_RATE(priv, "lq ant 0x%X 0x%X\n",
 727                        lq->general_params.single_stream_ant_msk,
 728                        lq->general_params.dual_stream_ant_msk);
 729
 730         for (i = 0; i < LINK_QUAL_MAX_RETRY_NUM; i++)
 731                 IWL_DEBUG_RATE(priv, "lq index %d 0x%X\n",
 732                                i, lq->rs_table[i].rate_n_flags);
 733 }
 734 #else
 735 static inline void iwl_dump_lq_cmd(struct iwl_priv *priv,
 736                                    struct iwl_link_quality_cmd *lq)
 737 {
 738 }
 739 #endif
 740
 741 /**
 742  * is_lq_table_valid() - Test one aspect of LQ cmd for validity
 743  *
 744  * It sometimes happens when a HT rate has been in use and we
 745  * loose connectivity with AP then mac80211 will first tell us that the
 746  * current channel is not HT anymore before removing the station. In such a
 747  * scenario the RXON flags will be updated to indicate we are not
 748  * communicating HT anymore, but the LQ command may still contain HT rates.
 749  * Test for this to prevent driver from sending LQ command between the time
 750  * RXON flags are updated and when LQ command is updated.
 751  */
 752 static bool is_lq_table_valid(struct iwl_priv *priv,
 753                               struct iwl_rxon_context *ctx,
 754                               struct iwl_link_quality_cmd *lq)
 755 {
 756         int i;
 757
 758         if (ctx->ht.enabled)
 759                 return true;
 760
 761         IWL_DEBUG_INFO(priv, "Channel %u is not an HT channel\n",
 762                        ctx->active.channel);
 763         for (i = 0; i < LINK_QUAL_MAX_RETRY_NUM; i++) {
 764                 if (le32_to_cpu(lq->rs_table[i].rate_n_flags) &
 765                     RATE_MCS_HT_MSK) {
 766                         IWL_DEBUG_INFO(priv,
 767                                        "index %d of LQ expects HT channel\n",
 768                                        i);
 769                         return false;
 770                 }
 771         }
 772         return true;
 773 }
 774
 775 /**
 776  * iwl_send_lq_cmd() - Send link quality command
 777  * @init: This command is sent as part of station initialization right
 778  *        after station has been added.
 779  *
 780  * The link quality command is sent as the last step of station creation.
 781  * This is the special case in which init is set and we call a callback in
 782  * this case to clear the state indicating that station creation is in
 783  * progress.
 784  */
 785 int iwl_send_lq_cmd(struct iwl_priv *priv, struct iwl_rxon_context *ctx,
 786                     struct iwl_link_quality_cmd *lq, u8 flags, bool init)
 787 {
 788         int ret = 0;
 789         unsigned long flags_spin;
 790
 791         struct iwl_host_cmd cmd = {
 792                 .id = REPLY_TX_LINK_QUALITY_CMD,
 793                 .len = { sizeof(struct iwl_link_quality_cmd), },
 794                 .flags = flags,
 795                 .data = { lq, },
 796         };
 797
 798         if (WARN_ON(lq->sta_id == IWL_INVALID_STATION))
 799                 return -EINVAL;
 800
 801
 802         spin_lock_irqsave(&priv->shrd->sta_lock, flags_spin);
 803         if (!(priv->stations[lq->sta_id].used & IWL_STA_DRIVER_ACTIVE)) {
 804                 spin_unlock_irqrestore(&priv->shrd->sta_lock, flags_spin);
 805                 return -EINVAL;
 806         }
 807         spin_unlock_irqrestore(&priv->shrd->sta_lock, flags_spin);
 808
 809         iwl_dump_lq_cmd(priv, lq);
 810         if (WARN_ON(init && (cmd.flags & CMD_ASYNC)))
 811                 return -EINVAL;
 812
 813         if (is_lq_table_valid(priv, ctx, lq))
 814                 ret = iwl_trans_send_cmd(trans(priv), &cmd);
 815         else
 816                 ret = -EINVAL;
 817
 818         if (cmd.flags & CMD_ASYNC)
 819                 return ret;
 820
 821         if (init) {
 822                 IWL_DEBUG_INFO(priv, "init LQ command complete, "
 823                                "clearing sta addition status for sta %d\n",
 824                                lq->sta_id);
 825                 spin_lock_irqsave(&priv->shrd->sta_lock, flags_spin);
 826                 priv->stations[lq->sta_id].used &= ~IWL_STA_UCODE_INPROGRESS;
 827                 spin_unlock_irqrestore(&priv->shrd->sta_lock, flags_spin);
 828         }
 829         return ret;
 830 }
 831
 832
 833 void iwl_sta_fill_lq(struct iwl_priv *priv, struct iwl_rxon_context *ctx,
 834                      u8 sta_id, struct iwl_link_quality_cmd *link_cmd)
 835 {
 836         int i, r;
 837         u32 rate_flags = 0;
 838         __le32 rate_n_flags;
 839
 840         lockdep_assert_held(&priv->shrd->mutex);
 841
 842         memset(link_cmd, 0, sizeof(*link_cmd));
 843
 844         /* Set up the rate scaling to start at selected rate, fall back
 845          * all the way down to 1M in IEEE order, and then spin on 1M */
 846         if (priv->band == IEEE80211_BAND_5GHZ)
 847                 r = IWL_RATE_6M_INDEX;
 848         else if (ctx && ctx->vif && ctx->vif->p2p)
 849                 r = IWL_RATE_6M_INDEX;
 850         else
 851                 r = IWL_RATE_1M_INDEX;
 852
 853         if (r >= IWL_FIRST_CCK_RATE && r <= IWL_LAST_CCK_RATE)
 854                 rate_flags |= RATE_MCS_CCK_MSK;
 855
 856         rate_flags |= first_antenna(hw_params(priv).valid_tx_ant) <<
 857                                 RATE_MCS_ANT_POS;
 858         rate_n_flags = iwl_hw_set_rate_n_flags(iwl_rates[r].plcp, rate_flags);
 859         for (i = 0; i < LINK_QUAL_MAX_RETRY_NUM; i++)
 860                 link_cmd->rs_table[i].rate_n_flags = rate_n_flags;
 861
 862         link_cmd->general_params.single_stream_ant_msk =
 863                         first_antenna(hw_params(priv).valid_tx_ant);
 864
 865         link_cmd->general_params.dual_stream_ant_msk =
 866                 hw_params(priv).valid_tx_ant &
 867                 ~first_antenna(hw_params(priv).valid_tx_ant);
 868         if (!link_cmd->general_params.dual_stream_ant_msk) {
 869                 link_cmd->general_params.dual_stream_ant_msk = ANT_AB;
 870         } else if (num_of_ant(hw_params(priv).valid_tx_ant) == 2) {
 871                 link_cmd->general_params.dual_stream_ant_msk =
 872                         hw_params(priv).valid_tx_ant;
 873         }
 874
 875         link_cmd->agg_params.agg_dis_start_th =
 876                 LINK_QUAL_AGG_DISABLE_START_DEF;
 877         link_cmd->agg_params.agg_time_limit =
 878                 cpu_to_le16(LINK_QUAL_AGG_TIME_LIMIT_DEF);
 879
 880         link_cmd->sta_id = sta_id;
 881 }
 882
 883 static struct iwl_link_quality_cmd *
 884 iwl_sta_alloc_lq(struct iwl_priv *priv, struct iwl_rxon_context *ctx,
 885                  u8 sta_id)
 886 {
 887         struct iwl_link_quality_cmd *link_cmd;
 888
 889         link_cmd = kzalloc(sizeof(struct iwl_link_quality_cmd), GFP_KERNEL);
 890         if (!link_cmd) {
 891                 IWL_ERR(priv, "Unable to allocate memory for LQ cmd.\n");
 892                 return NULL;
 893         }
 894
 895         iwl_sta_fill_lq(priv, ctx, sta_id, link_cmd);
 896
 897         return link_cmd;
 898 }
 899
 900 /*
 901  * iwlagn_add_bssid_station - Add the special IBSS BSSID station
 902  *
 903  * Function sleeps.
 904  */
 905 int iwlagn_add_bssid_station(struct iwl_priv *priv,
 906                              struct iwl_rxon_context *ctx,
 907                              const u8 *addr, u8 *sta_id_r)
 908 {
 909         int ret;
 910         u8 sta_id;
 911         struct iwl_link_quality_cmd *link_cmd;
 912         unsigned long flags;
 913
 914         if (sta_id_r)
 915                 *sta_id_r = IWL_INVALID_STATION;
 916
 917         ret = iwl_add_station_common(priv, ctx, addr, 0, NULL, &sta_id);
 918         if (ret) {
 919                 IWL_ERR(priv, "Unable to add station %pM\n", addr);
 920                 return ret;
 921         }
 922
 923         if (sta_id_r)
 924                 *sta_id_r = sta_id;
 925
 926         spin_lock_irqsave(&priv->shrd->sta_lock, flags);
 927         priv->stations[sta_id].used |= IWL_STA_LOCAL;
 928         spin_unlock_irqrestore(&priv->shrd->sta_lock, flags);
 929
 930         /* Set up default rate scaling table in device's station table */
 931         link_cmd = iwl_sta_alloc_lq(priv, ctx, sta_id);
 932         if (!link_cmd) {
 933                 IWL_ERR(priv,
 934                         "Unable to initialize rate scaling for station %pM.\n",
 935                         addr);
 936                 return -ENOMEM;
 937         }
 938
 939         ret = iwl_send_lq_cmd(priv, ctx, link_cmd, CMD_SYNC, true);
 940         if (ret)
 941                 IWL_ERR(priv, "Link quality command failed (%d)\n", ret);
 942
 943         spin_lock_irqsave(&priv->shrd->sta_lock, flags);
 944         priv->stations[sta_id].lq = link_cmd;
 945         spin_unlock_irqrestore(&priv->shrd->sta_lock, flags);
 946
 947         return 0;
 948 }
 949
 950 /*
 951  * static WEP keys
 952  *
 953  * For each context, the device has a table of 4 static WEP keys
 954  * (one for each key index) that is updated with the following
 955  * commands.
 956  */
 957
 958 static int iwl_send_static_wepkey_cmd(struct iwl_priv *priv,
 959                                       struct iwl_rxon_context *ctx,
 960                                       bool send_if_empty)
 961 {
 962         int i, not_empty = 0;
 963         u8 buff[sizeof(struct iwl_wep_cmd) +
 964                 sizeof(struct iwl_wep_key) * WEP_KEYS_MAX];
 965         struct iwl_wep_cmd *wep_cmd = (struct iwl_wep_cmd *)buff;
 966         size_t cmd_size  = sizeof(struct iwl_wep_cmd);
 967         struct iwl_host_cmd cmd = {
 968                 .id = ctx->wep_key_cmd,
 969                 .data = { wep_cmd, },
 970                 .flags = CMD_SYNC,
 971         };
 972
 973         might_sleep();
 974
 975         memset(wep_cmd, 0, cmd_size +
 976                         (sizeof(struct iwl_wep_key) * WEP_KEYS_MAX));
 977
 978         for (i = 0; i < WEP_KEYS_MAX ; i++) {
 979                 wep_cmd->key[i].key_index = i;
 980                 if (ctx->wep_keys[i].key_size) {
 981                         wep_cmd->key[i].key_offset = i;
 982                         not_empty = 1;
 983                 } else {
 984                         wep_cmd->key[i].key_offset = WEP_INVALID_OFFSET;
 985                 }
 986
 987                 wep_cmd->key[i].key_size = ctx->wep_keys[i].key_size;
 988                 memcpy(&wep_cmd->key[i].key[3], ctx->wep_keys[i].key,
 989                                 ctx->wep_keys[i].key_size);
 990         }
 991
 992         wep_cmd->global_key_type = WEP_KEY_WEP_TYPE;
 993         wep_cmd->num_keys = WEP_KEYS_MAX;
 994
 995         cmd_size += sizeof(struct iwl_wep_key) * WEP_KEYS_MAX;
 996
 997         cmd.len[0] = cmd_size;
 998
 999         if (not_empty || send_if_empty)
1000                 return iwl_trans_send_cmd(trans(priv), &cmd);
1001         else
1002                 return 0;
1003 }
1004
1005 int iwl_restore_default_wep_keys(struct iwl_priv *priv,
1006                                  struct iwl_rxon_context *ctx)
1007 {
1008         lockdep_assert_held(&priv->shrd->mutex);
1009
1010         return iwl_send_static_wepkey_cmd(priv, ctx, false);
1011 }
1012
1013 int iwl_remove_default_wep_key(struct iwl_priv *priv,
1014                                struct iwl_rxon_context *ctx,
1015                                struct ieee80211_key_conf *keyconf)
1016 {
1017         int ret;
1018
1019         lockdep_assert_held(&priv->shrd->mutex);
1020
1021         IWL_DEBUG_WEP(priv, "Removing default WEP key: idx=%d\n",
1022                       keyconf->keyidx);
1023
1024         memset(&ctx->wep_keys[keyconf->keyidx], 0, sizeof(ctx->wep_keys[0]));
1025         if (iwl_is_rfkill(priv->shrd)) {
1026                 IWL_DEBUG_WEP(priv,
1027                         "Not sending REPLY_WEPKEY command due to RFKILL.\n");
1028                 /* but keys in device are clear anyway so return success */
1029                 return 0;
1030         }
1031         ret = iwl_send_static_wepkey_cmd(priv, ctx, 1);
1032         IWL_DEBUG_WEP(priv, "Remove default WEP key: idx=%d ret=%d\n",
1033                       keyconf->keyidx, ret);
1034
1035         return ret;
1036 }
1037
1038 int iwl_set_default_wep_key(struct iwl_priv *priv,
1039                             struct iwl_rxon_context *ctx,
1040                             struct ieee80211_key_conf *keyconf)
1041 {
1042         int ret;
1043
1044         lockdep_assert_held(&priv->shrd->mutex);
1045
1046         if (keyconf->keylen != WEP_KEY_LEN_128 &&
1047             keyconf->keylen != WEP_KEY_LEN_64) {
1048                 IWL_DEBUG_WEP(priv,
1049                               "Bad WEP key length %d\n", keyconf->keylen);
1050                 return -EINVAL;
1051         }
1052
1053         keyconf->hw_key_idx = IWLAGN_HW_KEY_DEFAULT;
1054
1055         ctx->wep_keys[keyconf->keyidx].key_size = keyconf->keylen;
1056         memcpy(&ctx->wep_keys[keyconf->keyidx].key, &keyconf->key,
1057                                                         keyconf->keylen);
1058
1059         ret = iwl_send_static_wepkey_cmd(priv, ctx, false);
1060         IWL_DEBUG_WEP(priv, "Set default WEP key: len=%d idx=%d ret=%d\n",
1061                 keyconf->keylen, keyconf->keyidx, ret);
1062
1063         return ret;
1064 }
1065
1066 /*
1067  * dynamic (per-station) keys
1068  *
1069  * The dynamic keys are a little more complicated. The device has
1070  * a key cache of up to STA_KEY_MAX_NUM/STA_KEY_MAX_NUM_PAN keys.
1071  * These are linked to stations by a table that contains an index
1072  * into the key table for each station/key index/{mcast,unicast},
1073  * i.e. it's basically an array of pointers like this:
1074  *      key_offset_t key_mapping[NUM_STATIONS][4][2];
1075  * (it really works differently, but you can think of it as such)
1076  *
1077  * The key uploading and linking happens in the same command, the
1078  * add station command with STA_MODIFY_KEY_MASK.
1079  */
1080
1081 static u8 iwlagn_key_sta_id(struct iwl_priv *priv,
1082                             struct ieee80211_vif *vif,
1083                             struct ieee80211_sta *sta)
1084 {
1085         struct iwl_vif_priv *vif_priv = (void *)vif->drv_priv;
1086         u8 sta_id = IWL_INVALID_STATION;
1087
1088         if (sta)
1089                 sta_id = iwl_sta_id(sta);
1090
1091         /*
1092          * The device expects GTKs for station interfaces to be
1093          * installed as GTKs for the AP station. If we have no
1094          * station ID, then use the ap_sta_id in that case.
1095          */
1096         if (!sta && vif && vif_priv->ctx) {
1097                 switch (vif->type) {
1098                 case NL80211_IFTYPE_STATION:
1099                         sta_id = vif_priv->ctx->ap_sta_id;
1100                         break;
1101                 default:
1102                         /*
1103                          * In all other cases, the key will be
1104                          * used either for TX only or is bound
1105                          * to a station already.
1106                          */
1107                         break;
1108                 }
1109         }
1110
1111         return sta_id;
1112 }
1113
1114 static int iwlagn_send_sta_key(struct iwl_priv *priv,
1115                                struct ieee80211_key_conf *keyconf,
1116                                u8 sta_id, u32 tkip_iv32, u16 *tkip_p1k,
1117                                u32 cmd_flags)
1118 {
1119         unsigned long flags;
1120         __le16 key_flags;
1121         struct iwl_addsta_cmd sta_cmd;
1122         int i;
1123
1124         spin_lock_irqsave(&priv->shrd->sta_lock, flags);
1125         memcpy(&sta_cmd, &priv->stations[sta_id].sta, sizeof(sta_cmd));
1126         spin_unlock_irqrestore(&priv->shrd->sta_lock, flags);
1127
1128         key_flags = cpu_to_le16(keyconf->keyidx << STA_KEY_FLG_KEYID_POS);
1129         key_flags |= STA_KEY_FLG_MAP_KEY_MSK;
1130
1131         switch (keyconf->cipher) {
1132         case WLAN_CIPHER_SUITE_CCMP:
1133                 key_flags |= STA_KEY_FLG_CCMP;
1134                 memcpy(sta_cmd.key.key, keyconf->key, keyconf->keylen);
1135                 break;
1136         case WLAN_CIPHER_SUITE_TKIP:
1137                 key_flags |= STA_KEY_FLG_TKIP;
1138                 sta_cmd.key.tkip_rx_tsc_byte2 = tkip_iv32;
1139                 for (i = 0; i < 5; i++)
1140                         sta_cmd.key.tkip_rx_ttak[i] = cpu_to_le16(tkip_p1k[i]);
1141                 memcpy(sta_cmd.key.key, keyconf->key, keyconf->keylen);
1142                 break;
1143         case WLAN_CIPHER_SUITE_WEP104:
1144                 key_flags |= STA_KEY_FLG_KEY_SIZE_MSK;
1145                 /* fall through */
1146         case WLAN_CIPHER_SUITE_WEP40:
1147                 key_flags |= STA_KEY_FLG_WEP;
1148                 memcpy(&sta_cmd.key.key[3], keyconf->key, keyconf->keylen);
1149                 break;
1150         default:
1151                 WARN_ON(1);
1152                 return -EINVAL;
1153         }
1154
1155         if (!(keyconf->flags & IEEE80211_KEY_FLAG_PAIRWISE))
1156                 key_flags |= STA_KEY_MULTICAST_MSK;
1157
1158         /* key pointer (offset) */
1159         sta_cmd.key.key_offset = keyconf->hw_key_idx;
1160
1161         sta_cmd.key.key_flags = key_flags;
1162         sta_cmd.mode = STA_CONTROL_MODIFY_MSK;
1163         sta_cmd.sta.modify_mask = STA_MODIFY_KEY_MASK;
1164
1165         return iwl_send_add_sta(priv, &sta_cmd, cmd_flags);
1166 }
1167
1168 void iwl_update_tkip_key(struct iwl_priv *priv,
1169                          struct ieee80211_vif *vif,
1170                          struct ieee80211_key_conf *keyconf,
1171                          struct ieee80211_sta *sta, u32 iv32, u16 *phase1key)
1172 {
1173         u8 sta_id = iwlagn_key_sta_id(priv, vif, sta);
1174
1175         if (sta_id == IWL_INVALID_STATION)
1176                 return;
1177
1178         if (iwl_scan_cancel(priv)) {
1179                 /* cancel scan failed, just live w/ bad key and rely
1180                    briefly on SW decryption */
1181                 return;
1182         }
1183
1184         iwlagn_send_sta_key(priv, keyconf, sta_id,
1185                             iv32, phase1key, CMD_ASYNC);
1186 }
1187
1188 int iwl_remove_dynamic_key(struct iwl_priv *priv,
1189                            struct iwl_rxon_context *ctx,
1190                            struct ieee80211_key_conf *keyconf,
1191                            struct ieee80211_sta *sta)
1192 {
1193         unsigned long flags;
1194         struct iwl_addsta_cmd sta_cmd;
1195         u8 sta_id = iwlagn_key_sta_id(priv, ctx->vif, sta);
1196
1197         /* if station isn't there, neither is the key */
1198         if (sta_id == IWL_INVALID_STATION)
1199                 return -ENOENT;
1200
1201         spin_lock_irqsave(&priv->shrd->sta_lock, flags);
1202         memcpy(&sta_cmd, &priv->stations[sta_id].sta, sizeof(sta_cmd));
1203         if (!(priv->stations[sta_id].used & IWL_STA_UCODE_ACTIVE))
1204                 sta_id = IWL_INVALID_STATION;
1205         spin_unlock_irqrestore(&priv->shrd->sta_lock, flags);
1206
1207         if (sta_id == IWL_INVALID_STATION)
1208                 return 0;
1209
1210         lockdep_assert_held(&priv->shrd->mutex);
1211
1212         ctx->key_mapping_keys--;
1213
1214         IWL_DEBUG_WEP(priv, "Remove dynamic key: idx=%d sta=%d\n",
1215                       keyconf->keyidx, sta_id);
1216
1217         if (!test_and_clear_bit(keyconf->hw_key_idx, &priv->ucode_key_table))
1218                 IWL_ERR(priv, "offset %d not used in uCode key table.\n",
1219                         keyconf->hw_key_idx);
1220
1221         sta_cmd.key.key_flags = STA_KEY_FLG_NO_ENC | STA_KEY_FLG_INVALID;
1222         sta_cmd.key.key_offset = WEP_INVALID_OFFSET;
1223         sta_cmd.sta.modify_mask = STA_MODIFY_KEY_MASK;
1224         sta_cmd.mode = STA_CONTROL_MODIFY_MSK;
1225
1226         return iwl_send_add_sta(priv, &sta_cmd, CMD_SYNC);
1227 }
1228
1229 int iwl_set_dynamic_key(struct iwl_priv *priv,
1230                         struct iwl_rxon_context *ctx,
1231                         struct ieee80211_key_conf *keyconf,
1232                         struct ieee80211_sta *sta)
1233 {
1234         struct ieee80211_key_seq seq;
1235         u16 p1k[5];
1236         int ret;
1237         u8 sta_id = iwlagn_key_sta_id(priv, ctx->vif, sta);
1238         const u8 *addr;
1239
1240         if (sta_id == IWL_INVALID_STATION)
1241                 return -EINVAL;
1242
1243         lockdep_assert_held(&priv->shrd->mutex);
1244
1245         keyconf->hw_key_idx = iwl_get_free_ucode_key_offset(priv);
1246         if (keyconf->hw_key_idx == WEP_INVALID_OFFSET)
1247                 return -ENOSPC;
1248
1249         ctx->key_mapping_keys++;
1250
1251         switch (keyconf->cipher) {
1252         case WLAN_CIPHER_SUITE_TKIP:
1253                 if (sta)
1254                         addr = sta->addr;
1255                 else /* station mode case only */
1256                         addr = ctx->active.bssid_addr;
1257
1258                 /* pre-fill phase 1 key into device cache */
1259                 ieee80211_get_key_rx_seq(keyconf, 0, &seq);
1260                 ieee80211_get_tkip_rx_p1k(keyconf, addr, seq.tkip.iv32, p1k);
1261                 ret = iwlagn_send_sta_key(priv, keyconf, sta_id,
1262                                           seq.tkip.iv32, p1k, CMD_SYNC);
1263                 break;
1264         case WLAN_CIPHER_SUITE_CCMP:
1265         case WLAN_CIPHER_SUITE_WEP40:
1266         case WLAN_CIPHER_SUITE_WEP104:
1267                 ret = iwlagn_send_sta_key(priv, keyconf, sta_id,
1268                                           0, NULL, CMD_SYNC);
1269                 break;
1270         default:
1271                 IWL_ERR(priv, "Unknown cipher %x\n", keyconf->cipher);
1272                 ret = -EINVAL;
1273         }
1274
1275         if (ret) {
1276                 ctx->key_mapping_keys--;
1277                 clear_bit(keyconf->hw_key_idx, &priv->ucode_key_table);
1278         }
1279
1280         IWL_DEBUG_WEP(priv, "Set dynamic key: cipher=%x len=%d idx=%d sta=%pM ret=%d\n",
1281                       keyconf->cipher, keyconf->keylen, keyconf->keyidx,
1282                       sta ? sta->addr : NULL, ret);
1283
1284         return ret;
1285 }
1286
1287 /**
1288  * iwlagn_alloc_bcast_station - add broadcast station into driver's station table.
1289  *
1290  * This adds the broadcast station into the driver's station table
1291  * and marks it driver active, so that it will be restored to the
1292  * device at the next best time.
1293  */
1294 int iwlagn_alloc_bcast_station(struct iwl_priv *priv,
1295                                struct iwl_rxon_context *ctx)
1296 {
1297         struct iwl_link_quality_cmd *link_cmd;
1298         unsigned long flags;
1299         u8 sta_id;
1300
1301         spin_lock_irqsave(&priv->shrd->sta_lock, flags);
1302         sta_id = iwl_prep_station(priv, ctx, iwl_bcast_addr, false, NULL);
1303         if (sta_id == IWL_INVALID_STATION) {
1304                 IWL_ERR(priv, "Unable to prepare broadcast station\n");
1305                 spin_unlock_irqrestore(&priv->shrd->sta_lock, flags);
1306
1307                 return -EINVAL;
1308         }
1309
1310         priv->stations[sta_id].used |= IWL_STA_DRIVER_ACTIVE;
1311         priv->stations[sta_id].used |= IWL_STA_BCAST;
1312         spin_unlock_irqrestore(&priv->shrd->sta_lock, flags);
1313
1314         link_cmd = iwl_sta_alloc_lq(priv, ctx, sta_id);
1315         if (!link_cmd) {
1316                 IWL_ERR(priv,
1317                         "Unable to initialize rate scaling for bcast station.\n");
1318                 return -ENOMEM;
1319         }
1320
1321         spin_lock_irqsave(&priv->shrd->sta_lock, flags);
1322         priv->stations[sta_id].lq = link_cmd;
1323         spin_unlock_irqrestore(&priv->shrd->sta_lock, flags);
1324
1325         return 0;
1326 }
1327
1328 /**
1329  * iwl_update_bcast_station - update broadcast station's LQ command
1330  *
1331  * Only used by iwlagn. Placed here to have all bcast station management
1332  * code together.
1333  */
1334 int iwl_update_bcast_station(struct iwl_priv *priv,
1335                              struct iwl_rxon_context *ctx)
1336 {
1337         unsigned long flags;
1338         struct iwl_link_quality_cmd *link_cmd;
1339         u8 sta_id = ctx->bcast_sta_id;
1340
1341         link_cmd = iwl_sta_alloc_lq(priv, ctx, sta_id);
1342         if (!link_cmd) {
1343                 IWL_ERR(priv, "Unable to initialize rate scaling for bcast station.\n");
1344                 return -ENOMEM;
1345         }
1346
1347         spin_lock_irqsave(&priv->shrd->sta_lock, flags);
1348         if (priv->stations[sta_id].lq)
1349                 kfree(priv->stations[sta_id].lq);
1350         else
1351                 IWL_DEBUG_INFO(priv, "Bcast station rate scaling has not been initialized yet.\n");
1352         priv->stations[sta_id].lq = link_cmd;
1353         spin_unlock_irqrestore(&priv->shrd->sta_lock, flags);
1354
1355         return 0;
1356 }
1357
1358 int iwl_update_bcast_stations(struct iwl_priv *priv)
1359 {
1360         struct iwl_rxon_context *ctx;
1361         int ret = 0;
1362
1363         for_each_context(priv, ctx) {
1364                 ret = iwl_update_bcast_station(priv, ctx);
1365                 if (ret)
1366                         break;
1367         }
1368
1369         return ret;
1370 }
1371
1372 /**
1373  * iwl_sta_tx_modify_enable_tid - Enable Tx for this TID in station table
1374  */
1375 int iwl_sta_tx_modify_enable_tid(struct iwl_priv *priv, int sta_id, int tid)
1376 {
1377         unsigned long flags;
1378         struct iwl_addsta_cmd sta_cmd;
1379
1380         lockdep_assert_held(&priv->shrd->mutex);
1381
1382         /* Remove "disable" flag, to enable Tx for this TID */
1383         spin_lock_irqsave(&priv->shrd->sta_lock, flags);
1384         priv->stations[sta_id].sta.sta.modify_mask = STA_MODIFY_TID_DISABLE_TX;
1385         priv->stations[sta_id].sta.tid_disable_tx &= cpu_to_le16(~(1 << tid));
1386         priv->stations[sta_id].sta.mode = STA_CONTROL_MODIFY_MSK;
1387         memcpy(&sta_cmd, &priv->stations[sta_id].sta, sizeof(struct iwl_addsta_cmd));
1388         spin_unlock_irqrestore(&priv->shrd->sta_lock, flags);
1389
1390         return iwl_send_add_sta(priv, &sta_cmd, CMD_SYNC);
1391 }
1392
1393 int iwl_sta_rx_agg_start(struct iwl_priv *priv, struct ieee80211_sta *sta,
1394                          int tid, u16 ssn)
1395 {
1396         unsigned long flags;
1397         int sta_id;
1398         struct iwl_addsta_cmd sta_cmd;
1399
1400         lockdep_assert_held(&priv->shrd->mutex);
1401
1402         sta_id = iwl_sta_id(sta);
1403         if (sta_id == IWL_INVALID_STATION)
1404                 return -ENXIO;
1405
1406         spin_lock_irqsave(&priv->shrd->sta_lock, flags);
1407         priv->stations[sta_id].sta.station_flags_msk = 0;
1408         priv->stations[sta_id].sta.sta.modify_mask = STA_MODIFY_ADDBA_TID_MSK;
1409         priv->stations[sta_id].sta.add_immediate_ba_tid = (u8)tid;
1410         priv->stations[sta_id].sta.add_immediate_ba_ssn = cpu_to_le16(ssn);
1411         priv->stations[sta_id].sta.mode = STA_CONTROL_MODIFY_MSK;
1412         memcpy(&sta_cmd, &priv->stations[sta_id].sta, sizeof(struct iwl_addsta_cmd));
1413         spin_unlock_irqrestore(&priv->shrd->sta_lock, flags);
1414
1415         return iwl_send_add_sta(priv, &sta_cmd, CMD_SYNC);
1416 }
1417
1418 int iwl_sta_rx_agg_stop(struct iwl_priv *priv, struct ieee80211_sta *sta,
1419                         int tid)
1420 {
1421         unsigned long flags;
1422         int sta_id;
1423         struct iwl_addsta_cmd sta_cmd;
1424
1425         lockdep_assert_held(&priv->shrd->mutex);
1426
1427         sta_id = iwl_sta_id(sta);
1428         if (sta_id == IWL_INVALID_STATION) {
1429                 IWL_ERR(priv, "Invalid station for AGG tid %d\n", tid);
1430                 return -ENXIO;
1431         }
1432
1433         spin_lock_irqsave(&priv->shrd->sta_lock, flags);
1434         priv->stations[sta_id].sta.station_flags_msk = 0;
1435         priv->stations[sta_id].sta.sta.modify_mask = STA_MODIFY_DELBA_TID_MSK;
1436         priv->stations[sta_id].sta.remove_immediate_ba_tid = (u8)tid;
1437         priv->stations[sta_id].sta.mode = STA_CONTROL_MODIFY_MSK;
1438         memcpy(&sta_cmd, &priv->stations[sta_id].sta, sizeof(struct iwl_addsta_cmd));
1439         spin_unlock_irqrestore(&priv->shrd->sta_lock, flags);
1440
1441         return iwl_send_add_sta(priv, &sta_cmd, CMD_SYNC);
1442 }
1443
1444
1445
1446 void iwl_sta_modify_sleep_tx_count(struct iwl_priv *priv, int sta_id, int cnt)
1447 {
1448         unsigned long flags;
1449
1450         spin_lock_irqsave(&priv->shrd->sta_lock, flags);
1451         priv->stations[sta_id].sta.station_flags |= STA_FLG_PWR_SAVE_MSK;
1452         priv->stations[sta_id].sta.station_flags_msk = STA_FLG_PWR_SAVE_MSK;
1453         priv->stations[sta_id].sta.sta.modify_mask =
1454                                         STA_MODIFY_SLEEP_TX_COUNT_MSK;
1455         priv->stations[sta_id].sta.sleep_tx_count = cpu_to_le16(cnt);
1456         priv->stations[sta_id].sta.mode = STA_CONTROL_MODIFY_MSK;
1457         iwl_send_add_sta(priv, &priv->stations[sta_id].sta, CMD_ASYNC);
1458         spin_unlock_irqrestore(&priv->shrd->sta_lock, flags);
1459
1460 }