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

   1 /******************************************************************************
   2  *
   3  * Copyright(c) 2003 - 2010 Intel Corporation. All rights reserved.
   4  *
   5  * Portions of this file are derived from the ipw3945 project, as well
   6  * as portions of the ieee80211 subsystem header files.
   7  *
   8  * This program is free software; you can redistribute it and/or modify it
   9  * under the terms of version 2 of the GNU General Public License as
  10  * published by the Free Software Foundation.
  11  *
  12  * This program is distributed in the hope that it will be useful, but WITHOUT
  13  * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
  14  * FITNESS FOR A PARTICULAR PURPOSE.  See the GNU General Public License for
  15  * more details.
  16  *
  17  * You should have received a copy of the GNU General Public License along with
  18  * this program; if not, write to the Free Software Foundation, Inc.,
  19  * 51 Franklin Street, Fifth Floor, Boston, MA 02110, USA
  20  *
  21  * The full GNU General Public License is included in this distribution in the
  22  * file called LICENSE.
  23  *
  24  * Contact Information:
  25  *  Intel Linux Wireless <ilw@linux.intel.com>
  26  * Intel Corporation, 5200 N.E. Elam Young Parkway, Hillsboro, OR 97124-6497
  27  *
  28  *****************************************************************************/
  29
  30 #include <net/mac80211.h>
  31 #include <linux/etherdevice.h>
  32
  33 #include "iwl-dev.h"
  34 #include "iwl-core.h"
  35 #include "iwl-sta.h"
  36
  37 u8 iwl_find_station(struct iwl_priv *priv, const u8 *addr)
  38 {
  39         int i;
  40         int start = 0;
  41         int ret = IWL_INVALID_STATION;
  42         unsigned long flags;
  43
  44         if ((priv->iw_mode == NL80211_IFTYPE_ADHOC) ||
  45             (priv->iw_mode == NL80211_IFTYPE_AP))
  46                 start = IWL_STA_ID;
  47
  48         if (is_broadcast_ether_addr(addr))
  49                 return priv->hw_params.bcast_sta_id;
  50
  51         spin_lock_irqsave(&priv->sta_lock, flags);
  52         for (i = start; i < priv->hw_params.max_stations; i++)
  53                 if (priv->stations[i].used &&
  54                     (!compare_ether_addr(priv->stations[i].sta.sta.addr,
  55                                          addr))) {
  56                         ret = i;
  57                         goto out;
  58                 }
  59
  60         IWL_DEBUG_ASSOC_LIMIT(priv, "can not find STA %pM total %d\n",
  61                               addr, priv->num_stations);
  62
  63  out:
  64         spin_unlock_irqrestore(&priv->sta_lock, flags);
  65         return ret;
  66 }
  67 EXPORT_SYMBOL(iwl_find_station);
  68
  69 int iwl_get_ra_sta_id(struct iwl_priv *priv, struct ieee80211_hdr *hdr)
  70 {
  71         if (priv->iw_mode == NL80211_IFTYPE_STATION) {
  72                 return IWL_AP_ID;
  73         } else {
  74                 u8 *da = ieee80211_get_DA(hdr);
  75                 return iwl_find_station(priv, da);
  76         }
  77 }
  78 EXPORT_SYMBOL(iwl_get_ra_sta_id);
  79
  80 /* priv->sta_lock must be held */
  81 static void iwl_sta_ucode_activate(struct iwl_priv *priv, u8 sta_id)
  82 {
  83
  84         if (!(priv->stations[sta_id].used & IWL_STA_DRIVER_ACTIVE))
  85                 IWL_ERR(priv, "ACTIVATE a non DRIVER active station id %u addr %pM\n",
  86                         sta_id, priv->stations[sta_id].sta.sta.addr);
  87
  88         if (priv->stations[sta_id].used & IWL_STA_UCODE_ACTIVE) {
  89                 IWL_DEBUG_ASSOC(priv,
  90                                 "STA id %u addr %pM already present in uCode (according to driver)\n",
  91                                 sta_id, priv->stations[sta_id].sta.sta.addr);
  92         } else {
  93                 priv->stations[sta_id].used |= IWL_STA_UCODE_ACTIVE;
  94                 IWL_DEBUG_ASSOC(priv, "Added STA id %u addr %pM to uCode\n",
  95                                 sta_id, priv->stations[sta_id].sta.sta.addr);
  96         }
  97 }
  98
  99 static void iwl_process_add_sta_resp(struct iwl_priv *priv,
 100                                      struct iwl_addsta_cmd *addsta,
 101                                      struct iwl_rx_packet *pkt,
 102                                      bool sync)
 103 {
 104         u8 sta_id = addsta->sta.sta_id;
 105         unsigned long flags;
 106
 107         if (pkt->hdr.flags & IWL_CMD_FAILED_MSK) {
 108                 IWL_ERR(priv, "Bad return from REPLY_ADD_STA (0x%08X)\n",
 109                         pkt->hdr.flags);
 110                 return;
 111         }
 112
 113         IWL_DEBUG_INFO(priv, "Processing response for adding station %u\n",
 114                        sta_id);
 115
 116         spin_lock_irqsave(&priv->sta_lock, flags);
 117
 118         switch (pkt->u.add_sta.status) {
 119         case ADD_STA_SUCCESS_MSK:
 120                 IWL_DEBUG_INFO(priv, "REPLY_ADD_STA PASSED\n");
 121                 iwl_sta_ucode_activate(priv, sta_id);
 122                 break;
 123         case ADD_STA_NO_ROOM_IN_TABLE:
 124                 IWL_ERR(priv, "Adding station %d failed, no room in table.\n",
 125                         sta_id);
 126                 break;
 127         case ADD_STA_NO_BLOCK_ACK_RESOURCE:
 128                 IWL_ERR(priv, "Adding station %d failed, no block ack resource.\n",
 129                         sta_id);
 130                 break;
 131         case ADD_STA_MODIFY_NON_EXIST_STA:
 132                 IWL_ERR(priv, "Attempting to modify non-existing station %d \n",
 133                         sta_id);
 134                 break;
 135         default:
 136                 IWL_DEBUG_ASSOC(priv, "Received REPLY_ADD_STA:(0x%08X)\n",
 137                                 pkt->u.add_sta.status);
 138                 break;
 139         }
 140
 141         IWL_DEBUG_INFO(priv, "%s station id %u addr %pM\n",
 142                        priv->stations[sta_id].sta.mode ==
 143                        STA_CONTROL_MODIFY_MSK ?  "Modified" : "Added",
 144                        sta_id, priv->stations[sta_id].sta.sta.addr);
 145
 146         /*
 147          * XXX: The MAC address in the command buffer is often changed from
 148          * the original sent to the device. That is, the MAC address
 149          * written to the command buffer often is not the same MAC adress
 150          * read from the command buffer when the command returns. This
 151          * issue has not yet been resolved and this debugging is left to
 152          * observe the problem.
 153          */
 154         IWL_DEBUG_INFO(priv, "%s station according to cmd buffer %pM\n",
 155                        priv->stations[sta_id].sta.mode ==
 156                        STA_CONTROL_MODIFY_MSK ? "Modified" : "Added",
 157                        addsta->sta.addr);
 158
 159         /*
 160          * Determine if we wanted to modify or add a station,
 161          * if adding a station succeeded we have some more initialization
 162          * to do when using station notification. TODO
 163          */
 164
 165         spin_unlock_irqrestore(&priv->sta_lock, flags);
 166 }
 167
 168 static void iwl_add_sta_callback(struct iwl_priv *priv,
 169                                  struct iwl_device_cmd *cmd,
 170                                  struct iwl_rx_packet *pkt)
 171 {
 172         struct iwl_addsta_cmd *addsta =
 173                 (struct iwl_addsta_cmd *)cmd->cmd.payload;
 174
 175         iwl_process_add_sta_resp(priv, addsta, pkt, false);
 176
 177 }
 178
 179 int iwl_send_add_sta(struct iwl_priv *priv,
 180                      struct iwl_addsta_cmd *sta, u8 flags)
 181 {
 182         struct iwl_rx_packet *pkt = NULL;
 183         int ret = 0;
 184         u8 data[sizeof(*sta)];
 185         struct iwl_host_cmd cmd = {
 186                 .id = REPLY_ADD_STA,
 187                 .flags = flags,
 188                 .data = data,
 189         };
 190
 191         if (flags & CMD_ASYNC)
 192                 cmd.callback = iwl_add_sta_callback;
 193         else
 194                 cmd.flags |= CMD_WANT_SKB;
 195
 196         cmd.len = priv->cfg->ops->utils->build_addsta_hcmd(sta, data);
 197         ret = iwl_send_cmd(priv, &cmd);
 198
 199         if (ret || (flags & CMD_ASYNC))
 200                 return ret;
 201
 202         if (ret == 0) {
 203                 pkt = (struct iwl_rx_packet *)cmd.reply_page;
 204                 iwl_process_add_sta_resp(priv, sta, pkt, true);
 205         }
 206         iwl_free_pages(priv, cmd.reply_page);
 207
 208         return ret;
 209 }
 210 EXPORT_SYMBOL(iwl_send_add_sta);
 211
 212 static void iwl_set_ht_add_station(struct iwl_priv *priv, u8 index,
 213                                    struct ieee80211_sta_ht_cap *sta_ht_inf)
 214 {
 215         __le32 sta_flags;
 216         u8 mimo_ps_mode;
 217
 218         if (!sta_ht_inf || !sta_ht_inf->ht_supported)
 219                 goto done;
 220
 221         mimo_ps_mode = (sta_ht_inf->cap & IEEE80211_HT_CAP_SM_PS) >> 2;
 222         IWL_DEBUG_ASSOC(priv, "spatial multiplexing power save mode: %s\n",
 223                         (mimo_ps_mode == WLAN_HT_CAP_SM_PS_STATIC) ?
 224                         "static" :
 225                         (mimo_ps_mode == WLAN_HT_CAP_SM_PS_DYNAMIC) ?
 226                         "dynamic" : "disabled");
 227
 228         sta_flags = priv->stations[index].sta.station_flags;
 229
 230         sta_flags &= ~(STA_FLG_RTS_MIMO_PROT_MSK | STA_FLG_MIMO_DIS_MSK);
 231
 232         switch (mimo_ps_mode) {
 233         case WLAN_HT_CAP_SM_PS_STATIC:
 234                 sta_flags |= STA_FLG_MIMO_DIS_MSK;
 235                 break;
 236         case WLAN_HT_CAP_SM_PS_DYNAMIC:
 237                 sta_flags |= STA_FLG_RTS_MIMO_PROT_MSK;
 238                 break;
 239         case WLAN_HT_CAP_SM_PS_DISABLED:
 240                 break;
 241         default:
 242                 IWL_WARN(priv, "Invalid MIMO PS mode %d\n", mimo_ps_mode);
 243                 break;
 244         }
 245
 246         sta_flags |= cpu_to_le32(
 247               (u32)sta_ht_inf->ampdu_factor << STA_FLG_MAX_AGG_SIZE_POS);
 248
 249         sta_flags |= cpu_to_le32(
 250               (u32)sta_ht_inf->ampdu_density << STA_FLG_AGG_MPDU_DENSITY_POS);
 251
 252         if (iwl_is_ht40_tx_allowed(priv, sta_ht_inf))
 253                 sta_flags |= STA_FLG_HT40_EN_MSK;
 254         else
 255                 sta_flags &= ~STA_FLG_HT40_EN_MSK;
 256
 257         priv->stations[index].sta.station_flags = sta_flags;
 258  done:
 259         return;
 260 }
 261
 262 /**
 263  * iwl_add_station - Add station to tables in driver and device
 264  */
 265 u8 iwl_add_station(struct iwl_priv *priv, const u8 *addr, bool is_ap, u8 flags,
 266                 struct ieee80211_sta_ht_cap *ht_info)
 267 {
 268         struct iwl_station_entry *station;
 269         unsigned long flags_spin;
 270         int i;
 271         int sta_id = IWL_INVALID_STATION;
 272         u16 rate;
 273
 274         spin_lock_irqsave(&priv->sta_lock, flags_spin);
 275         if (is_ap)
 276                 sta_id = IWL_AP_ID;
 277         else if (is_broadcast_ether_addr(addr))
 278                 sta_id = priv->hw_params.bcast_sta_id;
 279         else
 280                 for (i = IWL_STA_ID; i < priv->hw_params.max_stations; i++) {
 281                         if (!compare_ether_addr(priv->stations[i].sta.sta.addr,
 282                                                 addr)) {
 283                                 sta_id = i;
 284                                 break;
 285                         }
 286
 287                         if (!priv->stations[i].used &&
 288                             sta_id == IWL_INVALID_STATION)
 289                                 sta_id = i;
 290                 }
 291
 292         /* These two conditions have the same outcome, but keep them separate
 293            since they have different meanings */
 294         if (unlikely(sta_id == IWL_INVALID_STATION)) {
 295                 spin_unlock_irqrestore(&priv->sta_lock, flags_spin);
 296                 return sta_id;
 297         }
 298
 299         if (priv->stations[sta_id].used &&
 300             !compare_ether_addr(priv->stations[sta_id].sta.sta.addr, addr)) {
 301                 spin_unlock_irqrestore(&priv->sta_lock, flags_spin);
 302                 return sta_id;
 303         }
 304
 305
 306         station = &priv->stations[sta_id];
 307         station->used = IWL_STA_DRIVER_ACTIVE;
 308         IWL_DEBUG_ASSOC(priv, "Add STA to driver ID %d: %pM\n",
 309                         sta_id, addr);
 310         priv->num_stations++;
 311
 312         /* Set up the REPLY_ADD_STA command to send to device */
 313         memset(&station->sta, 0, sizeof(struct iwl_addsta_cmd));
 314         memcpy(station->sta.sta.addr, addr, ETH_ALEN);
 315         station->sta.mode = 0;
 316         station->sta.sta.sta_id = sta_id;
 317         station->sta.station_flags = 0;
 318
 319         /* BCAST station and IBSS stations do not work in HT mode */
 320         if (sta_id != priv->hw_params.bcast_sta_id &&
 321             priv->iw_mode != NL80211_IFTYPE_ADHOC)
 322                 iwl_set_ht_add_station(priv, sta_id, ht_info);
 323
 324         /* 3945 only */
 325         rate = (priv->band == IEEE80211_BAND_5GHZ) ?
 326                 IWL_RATE_6M_PLCP : IWL_RATE_1M_PLCP;
 327         /* Turn on both antennas for the station... */
 328         station->sta.rate_n_flags = cpu_to_le16(rate | RATE_MCS_ANT_AB_MSK);
 329
 330         spin_unlock_irqrestore(&priv->sta_lock, flags_spin);
 331
 332         /* Add station to device's station table */
 333         iwl_send_add_sta(priv, &station->sta, flags);
 334         return sta_id;
 335
 336 }
 337 EXPORT_SYMBOL(iwl_add_station);
 338
 339 static void iwl_sta_ucode_deactivate(struct iwl_priv *priv, const u8 *addr)
 340 {
 341         unsigned long flags;
 342         u8 sta_id = iwl_find_station(priv, addr);
 343
 344         BUG_ON(sta_id == IWL_INVALID_STATION);
 345
 346         IWL_DEBUG_ASSOC(priv, "Removed STA from Ucode: %pM\n", addr);
 347
 348         spin_lock_irqsave(&priv->sta_lock, flags);
 349
 350         /* Ucode must be active and driver must be non active */
 351         if (priv->stations[sta_id].used != IWL_STA_UCODE_ACTIVE)
 352                 IWL_ERR(priv, "removed non active STA %d\n", sta_id);
 353
 354         priv->stations[sta_id].used &= ~IWL_STA_UCODE_ACTIVE;
 355
 356         memset(&priv->stations[sta_id], 0, sizeof(struct iwl_station_entry));
 357         spin_unlock_irqrestore(&priv->sta_lock, flags);
 358 }
 359
 360 static void iwl_remove_sta_callback(struct iwl_priv *priv,
 361                                     struct iwl_device_cmd *cmd,
 362                                     struct iwl_rx_packet *pkt)
 363 {
 364         struct iwl_rem_sta_cmd *rm_sta =
 365                         (struct iwl_rem_sta_cmd *)cmd->cmd.payload;
 366         const u8 *addr = rm_sta->addr;
 367
 368         if (pkt->hdr.flags & IWL_CMD_FAILED_MSK) {
 369                 IWL_ERR(priv, "Bad return from REPLY_REMOVE_STA (0x%08X)\n",
 370                 pkt->hdr.flags);
 371                 return;
 372         }
 373
 374         switch (pkt->u.rem_sta.status) {
 375         case REM_STA_SUCCESS_MSK:
 376                 iwl_sta_ucode_deactivate(priv, addr);
 377                 break;
 378         default:
 379                 IWL_ERR(priv, "REPLY_REMOVE_STA failed\n");
 380                 break;
 381         }
 382 }
 383
 384 static int iwl_send_remove_station(struct iwl_priv *priv, const u8 *addr,
 385                                    u8 flags)
 386 {
 387         struct iwl_rx_packet *pkt;
 388         int ret;
 389
 390         struct iwl_rem_sta_cmd rm_sta_cmd;
 391
 392         struct iwl_host_cmd cmd = {
 393                 .id = REPLY_REMOVE_STA,
 394                 .len = sizeof(struct iwl_rem_sta_cmd),
 395                 .flags = flags,
 396                 .data = &rm_sta_cmd,
 397         };
 398
 399         memset(&rm_sta_cmd, 0, sizeof(rm_sta_cmd));
 400         rm_sta_cmd.num_sta = 1;
 401         memcpy(&rm_sta_cmd.addr, addr , ETH_ALEN);
 402
 403         if (flags & CMD_ASYNC)
 404                 cmd.callback = iwl_remove_sta_callback;
 405         else
 406                 cmd.flags |= CMD_WANT_SKB;
 407         ret = iwl_send_cmd(priv, &cmd);
 408
 409         if (ret || (flags & CMD_ASYNC))
 410                 return ret;
 411
 412         pkt = (struct iwl_rx_packet *)cmd.reply_page;
 413         if (pkt->hdr.flags & IWL_CMD_FAILED_MSK) {
 414                 IWL_ERR(priv, "Bad return from REPLY_REMOVE_STA (0x%08X)\n",
 415                           pkt->hdr.flags);
 416                 ret = -EIO;
 417         }
 418
 419         if (!ret) {
 420                 switch (pkt->u.rem_sta.status) {
 421                 case REM_STA_SUCCESS_MSK:
 422                         iwl_sta_ucode_deactivate(priv, addr);
 423                         IWL_DEBUG_ASSOC(priv, "REPLY_REMOVE_STA PASSED\n");
 424                         break;
 425                 default:
 426                         ret = -EIO;
 427                         IWL_ERR(priv, "REPLY_REMOVE_STA failed\n");
 428                         break;
 429                 }
 430         }
 431         iwl_free_pages(priv, cmd.reply_page);
 432
 433         return ret;
 434 }
 435
 436 /**
 437  * iwl_remove_station - Remove driver's knowledge of station.
 438  */
 439 int iwl_remove_station(struct iwl_priv *priv, const u8 *addr, bool is_ap)
 440 {
 441         int sta_id = IWL_INVALID_STATION;
 442         int i, ret = -EINVAL;
 443         unsigned long flags;
 444
 445         spin_lock_irqsave(&priv->sta_lock, flags);
 446
 447         if (is_ap)
 448                 sta_id = IWL_AP_ID;
 449         else if (is_broadcast_ether_addr(addr))
 450                 sta_id = priv->hw_params.bcast_sta_id;
 451         else
 452                 for (i = IWL_STA_ID; i < priv->hw_params.max_stations; i++)
 453                         if (priv->stations[i].used &&
 454                             !compare_ether_addr(priv->stations[i].sta.sta.addr,
 455                                                 addr)) {
 456                                 sta_id = i;
 457                                 break;
 458                         }
 459
 460         if (unlikely(sta_id == IWL_INVALID_STATION))
 461                 goto out;
 462
 463         IWL_DEBUG_ASSOC(priv, "Removing STA from driver:%d  %pM\n",
 464                 sta_id, addr);
 465
 466         if (!(priv->stations[sta_id].used & IWL_STA_DRIVER_ACTIVE)) {
 467                 IWL_ERR(priv, "Removing %pM but non DRIVER active\n",
 468                                 addr);
 469                 goto out;
 470         }
 471
 472         if (!(priv->stations[sta_id].used & IWL_STA_UCODE_ACTIVE)) {
 473                 IWL_ERR(priv, "Removing %pM but non UCODE active\n",
 474                                 addr);
 475                 goto out;
 476         }
 477
 478
 479         priv->stations[sta_id].used &= ~IWL_STA_DRIVER_ACTIVE;
 480
 481         priv->num_stations--;
 482
 483         BUG_ON(priv->num_stations < 0);
 484
 485         spin_unlock_irqrestore(&priv->sta_lock, flags);
 486
 487         ret = iwl_send_remove_station(priv, addr, CMD_ASYNC);
 488         return ret;
 489 out:
 490         spin_unlock_irqrestore(&priv->sta_lock, flags);
 491         return ret;
 492 }
 493
 494 /**
 495  * iwl_clear_ucode_stations() - clear entire station table driver and/or ucode
 496  * @priv:
 497  * @force: If set then the uCode station table needs to be cleared here. If
 498  *         not set then the uCode station table has already been cleared,
 499  *         for example after sending it a RXON command without ASSOC bit
 500  *         set, and we just need to change driver state here.
 501  */
 502 void iwl_clear_ucode_stations(struct iwl_priv *priv, bool force)
 503 {
 504         int i;
 505         unsigned long flags_spin;
 506         bool cleared = false;
 507
 508         IWL_DEBUG_INFO(priv, "Clearing ucode stations in driver%s\n",
 509                         force ? " and ucode" : "");
 510
 511         if (force) {
 512                 if (!iwl_is_ready(priv)) {
 513                         /*
 514                          * If device is not ready at this point the station
 515                          * table is likely already empty (uCode not ready
 516                          * to receive station requests) or will soon be
 517                          * due to interface going down.
 518                          */
 519                         IWL_DEBUG_INFO(priv, "Unable to remove stations from device - device not ready\n");
 520                 } else {
 521                         iwl_send_cmd_pdu_async(priv, REPLY_REMOVE_ALL_STA, 0, NULL, NULL);
 522                 }
 523         }
 524
 525         spin_lock_irqsave(&priv->sta_lock, flags_spin);
 526         if (force) {
 527                 IWL_DEBUG_INFO(priv, "Clearing all station information in driver\n");
 528                 priv->num_stations = 0;
 529                 memset(priv->stations, 0, sizeof(priv->stations));
 530         } else {
 531                 for (i = 0; i < priv->hw_params.max_stations; i++) {
 532                         if (priv->stations[i].used & IWL_STA_UCODE_ACTIVE) {
 533                                 IWL_DEBUG_INFO(priv, "Clearing ucode active for station %d \n", i);
 534                                 priv->stations[i].used &= ~IWL_STA_UCODE_ACTIVE;
 535                                 cleared = true;
 536                         }
 537                 }
 538         }
 539         spin_unlock_irqrestore(&priv->sta_lock, flags_spin);
 540
 541         if (!cleared)
 542                 IWL_DEBUG_INFO(priv, "No active stations found to be cleared\n");
 543 }
 544 EXPORT_SYMBOL(iwl_clear_ucode_stations);
 545
 546 /**
 547  * iwl_restore_stations() - Restore driver known stations to device
 548  *
 549  * All stations considered active by driver, but not present in ucode, is
 550  * restored.
 551  */
 552 void iwl_restore_stations(struct iwl_priv *priv)
 553 {
 554         unsigned long flags_spin;
 555         int i;
 556         bool found = false;
 557
 558         if (!iwl_is_ready(priv)) {
 559                 IWL_DEBUG_INFO(priv, "Not ready yet, not restoring any stations.\n");
 560                 return;
 561         }
 562
 563         IWL_DEBUG_ASSOC(priv, "Restoring all known stations ... start.\n");
 564         spin_lock_irqsave(&priv->sta_lock, flags_spin);
 565         for (i = 0; i < priv->hw_params.max_stations; i++) {
 566                 if ((priv->stations[i].used & IWL_STA_DRIVER_ACTIVE) &&
 567                             !(priv->stations[i].used & IWL_STA_UCODE_ACTIVE)) {
 568                         IWL_DEBUG_ASSOC(priv, "Restoring sta %pM\n",
 569                                         priv->stations[i].sta.sta.addr);
 570                         priv->stations[i].sta.mode = 0;
 571                         priv->stations[i].used |= IWL_STA_UCODE_INPROGRESS;
 572                         found = true;
 573                 }
 574         }
 575
 576         for (i = 0; i < priv->hw_params.max_stations; i++) {
 577                 if ((priv->stations[i].used & IWL_STA_UCODE_INPROGRESS)) {
 578                         iwl_send_add_sta(priv, &priv->stations[i].sta,
 579                                          CMD_ASYNC);
 580                         priv->stations[i].used &= ~IWL_STA_UCODE_INPROGRESS;
 581                 }
 582         }
 583
 584         spin_unlock_irqrestore(&priv->sta_lock, flags_spin);
 585         if (!found)
 586                 IWL_DEBUG_INFO(priv, "Restoring all known stations .... no stations to be restored.\n");
 587         else
 588                 IWL_DEBUG_INFO(priv, "Restoring all known stations .... in progress.\n");
 589 }
 590 EXPORT_SYMBOL(iwl_restore_stations);
 591
 592 int iwl_get_free_ucode_key_index(struct iwl_priv *priv)
 593 {
 594         int i;
 595
 596         for (i = 0; i < STA_KEY_MAX_NUM; i++)
 597                 if (!test_and_set_bit(i, &priv->ucode_key_table))
 598                         return i;
 599
 600         return WEP_INVALID_OFFSET;
 601 }
 602 EXPORT_SYMBOL(iwl_get_free_ucode_key_index);
 603
 604 int iwl_send_static_wepkey_cmd(struct iwl_priv *priv, u8 send_if_empty)
 605 {
 606         int i, not_empty = 0;
 607         u8 buff[sizeof(struct iwl_wep_cmd) +
 608                 sizeof(struct iwl_wep_key) * WEP_KEYS_MAX];
 609         struct iwl_wep_cmd *wep_cmd = (struct iwl_wep_cmd *)buff;
 610         size_t cmd_size  = sizeof(struct iwl_wep_cmd);
 611         struct iwl_host_cmd cmd = {
 612                 .id = REPLY_WEPKEY,
 613                 .data = wep_cmd,
 614                 .flags = CMD_SYNC,
 615         };
 616
 617         might_sleep();
 618
 619         memset(wep_cmd, 0, cmd_size +
 620                         (sizeof(struct iwl_wep_key) * WEP_KEYS_MAX));
 621
 622         for (i = 0; i < WEP_KEYS_MAX ; i++) {
 623                 wep_cmd->key[i].key_index = i;
 624                 if (priv->wep_keys[i].key_size) {
 625                         wep_cmd->key[i].key_offset = i;
 626                         not_empty = 1;
 627                 } else {
 628                         wep_cmd->key[i].key_offset = WEP_INVALID_OFFSET;
 629                 }
 630
 631                 wep_cmd->key[i].key_size = priv->wep_keys[i].key_size;
 632                 memcpy(&wep_cmd->key[i].key[3], priv->wep_keys[i].key,
 633                                 priv->wep_keys[i].key_size);
 634         }
 635
 636         wep_cmd->global_key_type = WEP_KEY_WEP_TYPE;
 637         wep_cmd->num_keys = WEP_KEYS_MAX;
 638
 639         cmd_size += sizeof(struct iwl_wep_key) * WEP_KEYS_MAX;
 640
 641         cmd.len = cmd_size;
 642
 643         if (not_empty || send_if_empty)
 644                 return iwl_send_cmd(priv, &cmd);
 645         else
 646                 return 0;
 647 }
 648 EXPORT_SYMBOL(iwl_send_static_wepkey_cmd);
 649
 650 int iwl_remove_default_wep_key(struct iwl_priv *priv,
 651                                struct ieee80211_key_conf *keyconf)
 652 {
 653         int ret;
 654
 655         WARN_ON(!mutex_is_locked(&priv->mutex));
 656
 657         IWL_DEBUG_WEP(priv, "Removing default WEP key: idx=%d\n",
 658                       keyconf->keyidx);
 659
 660         if (!test_and_clear_bit(keyconf->keyidx, &priv->ucode_key_table))
 661                 IWL_ERR(priv, "index %d not used in uCode key table.\n",
 662                           keyconf->keyidx);
 663
 664         priv->default_wep_key--;
 665         memset(&priv->wep_keys[keyconf->keyidx], 0, sizeof(priv->wep_keys[0]));
 666         if (iwl_is_rfkill(priv)) {
 667                 IWL_DEBUG_WEP(priv, "Not sending REPLY_WEPKEY command due to RFKILL.\n");
 668                 /* but keys in device are clear anyway so return success */
 669                 return 0;
 670         }
 671         ret = iwl_send_static_wepkey_cmd(priv, 1);
 672         IWL_DEBUG_WEP(priv, "Remove default WEP key: idx=%d ret=%d\n",
 673                       keyconf->keyidx, ret);
 674
 675         return ret;
 676 }
 677 EXPORT_SYMBOL(iwl_remove_default_wep_key);
 678
 679 int iwl_set_default_wep_key(struct iwl_priv *priv,
 680                             struct ieee80211_key_conf *keyconf)
 681 {
 682         int ret;
 683
 684         WARN_ON(!mutex_is_locked(&priv->mutex));
 685
 686         if (keyconf->keylen != WEP_KEY_LEN_128 &&
 687             keyconf->keylen != WEP_KEY_LEN_64) {
 688                 IWL_DEBUG_WEP(priv, "Bad WEP key length %d\n", keyconf->keylen);
 689                 return -EINVAL;
 690         }
 691
 692         keyconf->flags &= ~IEEE80211_KEY_FLAG_GENERATE_IV;
 693         keyconf->hw_key_idx = HW_KEY_DEFAULT;
 694         priv->stations[IWL_AP_ID].keyinfo.alg = ALG_WEP;
 695
 696         priv->default_wep_key++;
 697
 698         if (test_and_set_bit(keyconf->keyidx, &priv->ucode_key_table))
 699                 IWL_ERR(priv, "index %d already used in uCode key table.\n",
 700                           keyconf->keyidx);
 701
 702         priv->wep_keys[keyconf->keyidx].key_size = keyconf->keylen;
 703         memcpy(&priv->wep_keys[keyconf->keyidx].key, &keyconf->key,
 704                                                         keyconf->keylen);
 705
 706         ret = iwl_send_static_wepkey_cmd(priv, 0);
 707         IWL_DEBUG_WEP(priv, "Set default WEP key: len=%d idx=%d ret=%d\n",
 708                 keyconf->keylen, keyconf->keyidx, ret);
 709
 710         return ret;
 711 }
 712 EXPORT_SYMBOL(iwl_set_default_wep_key);
 713
 714 static int iwl_set_wep_dynamic_key_info(struct iwl_priv *priv,
 715                                 struct ieee80211_key_conf *keyconf,
 716                                 u8 sta_id)
 717 {
 718         unsigned long flags;
 719         __le16 key_flags = 0;
 720         int ret;
 721
 722         keyconf->flags &= ~IEEE80211_KEY_FLAG_GENERATE_IV;
 723
 724         key_flags |= (STA_KEY_FLG_WEP | STA_KEY_FLG_MAP_KEY_MSK);
 725         key_flags |= cpu_to_le16(keyconf->keyidx << STA_KEY_FLG_KEYID_POS);
 726         key_flags &= ~STA_KEY_FLG_INVALID;
 727
 728         if (keyconf->keylen == WEP_KEY_LEN_128)
 729                 key_flags |= STA_KEY_FLG_KEY_SIZE_MSK;
 730
 731         if (sta_id == priv->hw_params.bcast_sta_id)
 732                 key_flags |= STA_KEY_MULTICAST_MSK;
 733
 734         spin_lock_irqsave(&priv->sta_lock, flags);
 735
 736         priv->stations[sta_id].keyinfo.alg = keyconf->alg;
 737         priv->stations[sta_id].keyinfo.keylen = keyconf->keylen;
 738         priv->stations[sta_id].keyinfo.keyidx = keyconf->keyidx;
 739
 740         memcpy(priv->stations[sta_id].keyinfo.key,
 741                                 keyconf->key, keyconf->keylen);
 742
 743         memcpy(&priv->stations[sta_id].sta.key.key[3],
 744                                 keyconf->key, keyconf->keylen);
 745
 746         if ((priv->stations[sta_id].sta.key.key_flags & STA_KEY_FLG_ENCRYPT_MSK)
 747                         == STA_KEY_FLG_NO_ENC)
 748                 priv->stations[sta_id].sta.key.key_offset =
 749                                  iwl_get_free_ucode_key_index(priv);
 750         /* else, we are overriding an existing key => no need to allocated room
 751          * in uCode. */
 752
 753         WARN(priv->stations[sta_id].sta.key.key_offset == WEP_INVALID_OFFSET,
 754                 "no space for a new key");
 755
 756         priv->stations[sta_id].sta.key.key_flags = key_flags;
 757         priv->stations[sta_id].sta.sta.modify_mask = STA_MODIFY_KEY_MASK;
 758         priv->stations[sta_id].sta.mode = STA_CONTROL_MODIFY_MSK;
 759
 760         ret = iwl_send_add_sta(priv, &priv->stations[sta_id].sta, CMD_ASYNC);
 761
 762         spin_unlock_irqrestore(&priv->sta_lock, flags);
 763
 764         return ret;
 765 }
 766
 767 static int iwl_set_ccmp_dynamic_key_info(struct iwl_priv *priv,
 768                                    struct ieee80211_key_conf *keyconf,
 769                                    u8 sta_id)
 770 {
 771         unsigned long flags;
 772         __le16 key_flags = 0;
 773         int ret;
 774
 775         key_flags |= (STA_KEY_FLG_CCMP | STA_KEY_FLG_MAP_KEY_MSK);
 776         key_flags |= cpu_to_le16(keyconf->keyidx << STA_KEY_FLG_KEYID_POS);
 777         key_flags &= ~STA_KEY_FLG_INVALID;
 778
 779         if (sta_id == priv->hw_params.bcast_sta_id)
 780                 key_flags |= STA_KEY_MULTICAST_MSK;
 781
 782         keyconf->flags |= IEEE80211_KEY_FLAG_GENERATE_IV;
 783
 784         spin_lock_irqsave(&priv->sta_lock, flags);
 785         priv->stations[sta_id].keyinfo.alg = keyconf->alg;
 786         priv->stations[sta_id].keyinfo.keylen = keyconf->keylen;
 787
 788         memcpy(priv->stations[sta_id].keyinfo.key, keyconf->key,
 789                keyconf->keylen);
 790
 791         memcpy(priv->stations[sta_id].sta.key.key, keyconf->key,
 792                keyconf->keylen);
 793
 794         if ((priv->stations[sta_id].sta.key.key_flags & STA_KEY_FLG_ENCRYPT_MSK)
 795                         == STA_KEY_FLG_NO_ENC)
 796                 priv->stations[sta_id].sta.key.key_offset =
 797                                  iwl_get_free_ucode_key_index(priv);
 798         /* else, we are overriding an existing key => no need to allocated room
 799          * in uCode. */
 800
 801         WARN(priv->stations[sta_id].sta.key.key_offset == WEP_INVALID_OFFSET,
 802                 "no space for a new key");
 803
 804         priv->stations[sta_id].sta.key.key_flags = key_flags;
 805         priv->stations[sta_id].sta.sta.modify_mask = STA_MODIFY_KEY_MASK;
 806         priv->stations[sta_id].sta.mode = STA_CONTROL_MODIFY_MSK;
 807
 808         ret = iwl_send_add_sta(priv, &priv->stations[sta_id].sta, CMD_ASYNC);
 809
 810         spin_unlock_irqrestore(&priv->sta_lock, flags);
 811
 812         return ret;
 813 }
 814
 815 static int iwl_set_tkip_dynamic_key_info(struct iwl_priv *priv,
 816                                    struct ieee80211_key_conf *keyconf,
 817                                    u8 sta_id)
 818 {
 819         unsigned long flags;
 820         int ret = 0;
 821         __le16 key_flags = 0;
 822
 823         key_flags |= (STA_KEY_FLG_TKIP | STA_KEY_FLG_MAP_KEY_MSK);
 824         key_flags |= cpu_to_le16(keyconf->keyidx << STA_KEY_FLG_KEYID_POS);
 825         key_flags &= ~STA_KEY_FLG_INVALID;
 826
 827         if (sta_id == priv->hw_params.bcast_sta_id)
 828                 key_flags |= STA_KEY_MULTICAST_MSK;
 829
 830         keyconf->flags |= IEEE80211_KEY_FLAG_GENERATE_IV;
 831         keyconf->flags |= IEEE80211_KEY_FLAG_GENERATE_MMIC;
 832
 833         spin_lock_irqsave(&priv->sta_lock, flags);
 834
 835         priv->stations[sta_id].keyinfo.alg = keyconf->alg;
 836         priv->stations[sta_id].keyinfo.keylen = 16;
 837
 838         if ((priv->stations[sta_id].sta.key.key_flags & STA_KEY_FLG_ENCRYPT_MSK)
 839                         == STA_KEY_FLG_NO_ENC)
 840                 priv->stations[sta_id].sta.key.key_offset =
 841                                  iwl_get_free_ucode_key_index(priv);
 842         /* else, we are overriding an existing key => no need to allocated room
 843          * in uCode. */
 844
 845         WARN(priv->stations[sta_id].sta.key.key_offset == WEP_INVALID_OFFSET,
 846                 "no space for a new key");
 847
 848         priv->stations[sta_id].sta.key.key_flags = key_flags;
 849
 850
 851         /* This copy is acutally not needed: we get the key with each TX */
 852         memcpy(priv->stations[sta_id].keyinfo.key, keyconf->key, 16);
 853
 854         memcpy(priv->stations[sta_id].sta.key.key, keyconf->key, 16);
 855
 856         spin_unlock_irqrestore(&priv->sta_lock, flags);
 857
 858         return ret;
 859 }
 860
 861 void iwl_update_tkip_key(struct iwl_priv *priv,
 862                         struct ieee80211_key_conf *keyconf,
 863                         const u8 *addr, u32 iv32, u16 *phase1key)
 864 {
 865         u8 sta_id = IWL_INVALID_STATION;
 866         unsigned long flags;
 867         int i;
 868
 869         sta_id = iwl_find_station(priv, addr);
 870         if (sta_id == IWL_INVALID_STATION) {
 871                 IWL_DEBUG_MAC80211(priv, "leave - %pM not in station map.\n",
 872                                    addr);
 873                 return;
 874         }
 875
 876         if (iwl_scan_cancel(priv)) {
 877                 /* cancel scan failed, just live w/ bad key and rely
 878                    briefly on SW decryption */
 879                 return;
 880         }
 881
 882         spin_lock_irqsave(&priv->sta_lock, flags);
 883
 884         priv->stations[sta_id].sta.key.tkip_rx_tsc_byte2 = (u8) iv32;
 885
 886         for (i = 0; i < 5; i++)
 887                 priv->stations[sta_id].sta.key.tkip_rx_ttak[i] =
 888                         cpu_to_le16(phase1key[i]);
 889
 890         priv->stations[sta_id].sta.sta.modify_mask = STA_MODIFY_KEY_MASK;
 891         priv->stations[sta_id].sta.mode = STA_CONTROL_MODIFY_MSK;
 892
 893         iwl_send_add_sta(priv, &priv->stations[sta_id].sta, CMD_ASYNC);
 894
 895         spin_unlock_irqrestore(&priv->sta_lock, flags);
 896
 897 }
 898 EXPORT_SYMBOL(iwl_update_tkip_key);
 899
 900 int iwl_remove_dynamic_key(struct iwl_priv *priv,
 901                                 struct ieee80211_key_conf *keyconf,
 902                                 u8 sta_id)
 903 {
 904         unsigned long flags;
 905         int ret = 0;
 906         u16 key_flags;
 907         u8 keyidx;
 908
 909         priv->key_mapping_key--;
 910
 911         spin_lock_irqsave(&priv->sta_lock, flags);
 912         key_flags = le16_to_cpu(priv->stations[sta_id].sta.key.key_flags);
 913         keyidx = (key_flags >> STA_KEY_FLG_KEYID_POS) & 0x3;
 914
 915         IWL_DEBUG_WEP(priv, "Remove dynamic key: idx=%d sta=%d\n",
 916                       keyconf->keyidx, sta_id);
 917
 918         if (keyconf->keyidx != keyidx) {
 919                 /* We need to remove a key with index different that the one
 920                  * in the uCode. This means that the key we need to remove has
 921                  * been replaced by another one with different index.
 922                  * Don't do anything and return ok
 923                  */
 924                 spin_unlock_irqrestore(&priv->sta_lock, flags);
 925                 return 0;
 926         }
 927
 928         if (priv->stations[sta_id].sta.key.key_offset == WEP_INVALID_OFFSET) {
 929                 IWL_WARN(priv, "Removing wrong key %d 0x%x\n",
 930                             keyconf->keyidx, key_flags);
 931                 spin_unlock_irqrestore(&priv->sta_lock, flags);
 932                 return 0;
 933         }
 934
 935         if (!test_and_clear_bit(priv->stations[sta_id].sta.key.key_offset,
 936                 &priv->ucode_key_table))
 937                 IWL_ERR(priv, "index %d not used in uCode key table.\n",
 938                         priv->stations[sta_id].sta.key.key_offset);
 939         memset(&priv->stations[sta_id].keyinfo, 0,
 940                                         sizeof(struct iwl_hw_key));
 941         memset(&priv->stations[sta_id].sta.key, 0,
 942                                         sizeof(struct iwl4965_keyinfo));
 943         priv->stations[sta_id].sta.key.key_flags =
 944                         STA_KEY_FLG_NO_ENC | STA_KEY_FLG_INVALID;
 945         priv->stations[sta_id].sta.key.key_offset = WEP_INVALID_OFFSET;
 946         priv->stations[sta_id].sta.sta.modify_mask = STA_MODIFY_KEY_MASK;
 947         priv->stations[sta_id].sta.mode = STA_CONTROL_MODIFY_MSK;
 948
 949         if (iwl_is_rfkill(priv)) {
 950                 IWL_DEBUG_WEP(priv, "Not sending REPLY_ADD_STA command because RFKILL enabled. \n");
 951                 spin_unlock_irqrestore(&priv->sta_lock, flags);
 952                 return 0;
 953         }
 954         ret =  iwl_send_add_sta(priv, &priv->stations[sta_id].sta, CMD_ASYNC);
 955         spin_unlock_irqrestore(&priv->sta_lock, flags);
 956         return ret;
 957 }
 958 EXPORT_SYMBOL(iwl_remove_dynamic_key);
 959
 960 int iwl_set_dynamic_key(struct iwl_priv *priv,
 961                                 struct ieee80211_key_conf *keyconf, u8 sta_id)
 962 {
 963         int ret;
 964
 965         priv->key_mapping_key++;
 966         keyconf->hw_key_idx = HW_KEY_DYNAMIC;
 967
 968         switch (keyconf->alg) {
 969         case ALG_CCMP:
 970                 ret = iwl_set_ccmp_dynamic_key_info(priv, keyconf, sta_id);
 971                 break;
 972         case ALG_TKIP:
 973                 ret = iwl_set_tkip_dynamic_key_info(priv, keyconf, sta_id);
 974                 break;
 975         case ALG_WEP:
 976                 ret = iwl_set_wep_dynamic_key_info(priv, keyconf, sta_id);
 977                 break;
 978         default:
 979                 IWL_ERR(priv,
 980                         "Unknown alg: %s alg = %d\n", __func__, keyconf->alg);
 981                 ret = -EINVAL;
 982         }
 983
 984         IWL_DEBUG_WEP(priv, "Set dynamic key: alg= %d len=%d idx=%d sta=%d ret=%d\n",
 985                       keyconf->alg, keyconf->keylen, keyconf->keyidx,
 986                       sta_id, ret);
 987
 988         return ret;
 989 }
 990 EXPORT_SYMBOL(iwl_set_dynamic_key);
 991
 992 #ifdef CONFIG_IWLWIFI_DEBUG
 993 static void iwl_dump_lq_cmd(struct iwl_priv *priv,
 994                            struct iwl_link_quality_cmd *lq)
 995 {
 996         int i;
 997         IWL_DEBUG_RATE(priv, "lq station id 0x%x\n", lq->sta_id);
 998         IWL_DEBUG_RATE(priv, "lq ant 0x%X 0x%X\n",
 999                        lq->general_params.single_stream_ant_msk,
1000                        lq->general_params.dual_stream_ant_msk);
1001
1002         for (i = 0; i < LINK_QUAL_MAX_RETRY_NUM; i++)
1003                 IWL_DEBUG_RATE(priv, "lq index %d 0x%X\n",
1004                                i, lq->rs_table[i].rate_n_flags);
1005 }
1006 #else
1007 static inline void iwl_dump_lq_cmd(struct iwl_priv *priv,
1008                                    struct iwl_link_quality_cmd *lq)
1009 {
1010 }
1011 #endif
1012
1013 int iwl_send_lq_cmd(struct iwl_priv *priv,
1014                     struct iwl_link_quality_cmd *lq, u8 flags)
1015 {
1016         struct iwl_host_cmd cmd = {
1017                 .id = REPLY_TX_LINK_QUALITY_CMD,
1018                 .len = sizeof(struct iwl_link_quality_cmd),
1019                 .flags = flags,
1020                 .data = lq,
1021         };
1022
1023         if ((lq->sta_id == 0xFF) &&
1024             (priv->iw_mode == NL80211_IFTYPE_ADHOC))
1025                 return -EINVAL;
1026
1027         if (lq->sta_id == 0xFF)
1028                 lq->sta_id = IWL_AP_ID;
1029
1030         iwl_dump_lq_cmd(priv, lq);
1031
1032         if (iwl_is_associated(priv) && priv->assoc_station_added)
1033                 return  iwl_send_cmd(priv, &cmd);
1034
1035         return 0;
1036 }
1037 EXPORT_SYMBOL(iwl_send_lq_cmd);
1038
1039 /**
1040  * iwl_sta_init_lq - Initialize a station's hardware rate table
1041  *
1042  * The uCode's station table contains a table of fallback rates
1043  * for automatic fallback during transmission.
1044  *
1045  * NOTE: This sets up a default set of values.  These will be replaced later
1046  *       if the driver's iwl-agn-rs rate scaling algorithm is used, instead of
1047  *       rc80211_simple.
1048  *
1049  * NOTE: Run REPLY_ADD_STA command to set up station table entry, before
1050  *       calling this function (which runs REPLY_TX_LINK_QUALITY_CMD,
1051  *       which requires station table entry to exist).
1052  */
1053 static void iwl_sta_init_lq(struct iwl_priv *priv, const u8 *addr, bool is_ap)
1054 {
1055         int i, r;
1056         struct iwl_link_quality_cmd link_cmd = {
1057                 .reserved1 = 0,
1058         };
1059         u32 rate_flags;
1060
1061         /* Set up the rate scaling to start at selected rate, fall back
1062          * all the way down to 1M in IEEE order, and then spin on 1M */
1063         if (is_ap)
1064                 r = IWL_RATE_54M_INDEX;
1065         else if (priv->band == IEEE80211_BAND_5GHZ)
1066                 r = IWL_RATE_6M_INDEX;
1067         else
1068                 r = IWL_RATE_1M_INDEX;
1069
1070         for (i = 0; i < LINK_QUAL_MAX_RETRY_NUM; i++) {
1071                 rate_flags = 0;
1072                 if (r >= IWL_FIRST_CCK_RATE && r <= IWL_LAST_CCK_RATE)
1073                         rate_flags |= RATE_MCS_CCK_MSK;
1074
1075                 rate_flags |= first_antenna(priv->hw_params.valid_tx_ant) <<
1076                                 RATE_MCS_ANT_POS;
1077
1078                 link_cmd.rs_table[i].rate_n_flags =
1079                         iwl_hw_set_rate_n_flags(iwl_rates[r].plcp, rate_flags);
1080                 r = iwl_get_prev_ieee_rate(r);
1081         }
1082
1083         link_cmd.general_params.single_stream_ant_msk =
1084                                 first_antenna(priv->hw_params.valid_tx_ant);
1085         link_cmd.general_params.dual_stream_ant_msk = 3;
1086         link_cmd.agg_params.agg_dis_start_th = LINK_QUAL_AGG_DISABLE_START_DEF;
1087         link_cmd.agg_params.agg_time_limit =
1088                 cpu_to_le16(LINK_QUAL_AGG_TIME_LIMIT_DEF);
1089
1090         /* Update the rate scaling for control frame Tx to AP */
1091         link_cmd.sta_id = is_ap ? IWL_AP_ID : priv->hw_params.bcast_sta_id;
1092
1093         iwl_send_cmd_pdu_async(priv, REPLY_TX_LINK_QUALITY_CMD,
1094                                sizeof(link_cmd), &link_cmd, NULL);
1095 }
1096
1097 /**
1098  * iwl_rxon_add_station - add station into station table.
1099  *
1100  * there is only one AP station with id= IWL_AP_ID
1101  * NOTE: mutex must be held before calling this function
1102  */
1103 int iwl_rxon_add_station(struct iwl_priv *priv, const u8 *addr, bool is_ap)
1104 {
1105         struct ieee80211_sta *sta;
1106         struct ieee80211_sta_ht_cap ht_config;
1107         struct ieee80211_sta_ht_cap *cur_ht_config = NULL;
1108         u8 sta_id;
1109
1110         /*
1111          * Set HT capabilities. It is ok to set this struct even if not using
1112          * HT config: the priv->current_ht_config.is_ht flag will just be false
1113          */
1114         rcu_read_lock();
1115         sta = ieee80211_find_sta(priv->vif, addr);
1116         if (sta) {
1117                 memcpy(&ht_config, &sta->ht_cap, sizeof(ht_config));
1118                 cur_ht_config = &ht_config;
1119         }
1120         rcu_read_unlock();
1121
1122         /* Add station to device's station table */
1123         sta_id = iwl_add_station(priv, addr, is_ap, CMD_SYNC, cur_ht_config);
1124
1125         /* Set up default rate scaling table in device's station table */
1126         iwl_sta_init_lq(priv, addr, is_ap);
1127
1128         return sta_id;
1129 }
1130 EXPORT_SYMBOL(iwl_rxon_add_station);
1131
1132 /**
1133  * iwl_sta_init_bcast_lq - Initialize a bcast station's hardware rate table
1134  *
1135  * NOTE: Run REPLY_ADD_STA command to set up station table entry, before
1136  *       calling this function (which runs REPLY_TX_LINK_QUALITY_CMD,
1137  *       which requires station table entry to exist).
1138  */
1139 static void iwl_sta_init_bcast_lq(struct iwl_priv *priv)
1140 {
1141         int i, r;
1142         struct iwl_link_quality_cmd link_cmd = {
1143                 .reserved1 = 0,
1144         };
1145         u32 rate_flags;
1146
1147         /* Set up the rate scaling to start at selected rate, fall back
1148          * all the way down to 1M in IEEE order, and then spin on 1M */
1149         if (priv->band == IEEE80211_BAND_5GHZ)
1150                 r = IWL_RATE_6M_INDEX;
1151         else
1152                 r = IWL_RATE_1M_INDEX;
1153
1154         for (i = 0; i < LINK_QUAL_MAX_RETRY_NUM; i++) {
1155                 rate_flags = 0;
1156                 if (r >= IWL_FIRST_CCK_RATE && r <= IWL_LAST_CCK_RATE)
1157                         rate_flags |= RATE_MCS_CCK_MSK;
1158
1159                 rate_flags |= first_antenna(priv->hw_params.valid_tx_ant) <<
1160                                 RATE_MCS_ANT_POS;
1161
1162                 link_cmd.rs_table[i].rate_n_flags =
1163                         iwl_hw_set_rate_n_flags(iwl_rates[r].plcp, rate_flags);
1164                 r = iwl_get_prev_ieee_rate(r);
1165         }
1166
1167         link_cmd.general_params.single_stream_ant_msk =
1168                                 first_antenna(priv->hw_params.valid_tx_ant);
1169         link_cmd.general_params.dual_stream_ant_msk = 3;
1170         link_cmd.agg_params.agg_dis_start_th = LINK_QUAL_AGG_DISABLE_START_DEF;
1171         link_cmd.agg_params.agg_time_limit =
1172                 cpu_to_le16(LINK_QUAL_AGG_TIME_LIMIT_DEF);
1173
1174         /* Update the rate scaling for control frame Tx to AP */
1175         link_cmd.sta_id = priv->hw_params.bcast_sta_id;
1176
1177         iwl_send_cmd_pdu_async(priv, REPLY_TX_LINK_QUALITY_CMD,
1178                                sizeof(link_cmd), &link_cmd, NULL);
1179 }
1180
1181
1182 /**
1183  * iwl_add_bcast_station - add broadcast station into station table.
1184  */
1185 void iwl_add_bcast_station(struct iwl_priv *priv)
1186 {
1187         IWL_DEBUG_INFO(priv, "Adding broadcast station to station table\n");
1188         iwl_add_station(priv, iwl_bcast_addr, false, CMD_SYNC, NULL);
1189
1190         /* Set up default rate scaling table in device's station table */
1191         iwl_sta_init_bcast_lq(priv);
1192 }
1193 EXPORT_SYMBOL(iwl_add_bcast_station);
1194
1195 /**
1196  * iwl3945_add_bcast_station - add broadcast station into station table.
1197  */
1198 void iwl3945_add_bcast_station(struct iwl_priv *priv)
1199 {
1200         IWL_DEBUG_INFO(priv, "Adding broadcast station to station table\n");
1201         iwl_add_station(priv, iwl_bcast_addr, false, CMD_SYNC, NULL);
1202 }
1203 EXPORT_SYMBOL(iwl3945_add_bcast_station);
1204
1205 /**
1206  * iwl_get_sta_id - Find station's index within station table
1207  *
1208  * If new IBSS station, create new entry in station table
1209  */
1210 int iwl_get_sta_id(struct iwl_priv *priv, struct ieee80211_hdr *hdr)
1211 {
1212         int sta_id;
1213         __le16 fc = hdr->frame_control;
1214
1215         /* If this frame is broadcast or management, use broadcast station id */
1216         if (!ieee80211_is_data(fc) ||  is_multicast_ether_addr(hdr->addr1))
1217                 return priv->hw_params.bcast_sta_id;
1218
1219         switch (priv->iw_mode) {
1220
1221         /* If we are a client station in a BSS network, use the special
1222          * AP station entry (that's the only station we communicate with) */
1223         case NL80211_IFTYPE_STATION:
1224                 return IWL_AP_ID;
1225
1226         /* If we are an AP, then find the station, or use BCAST */
1227         case NL80211_IFTYPE_AP:
1228                 sta_id = iwl_find_station(priv, hdr->addr1);
1229                 if (sta_id != IWL_INVALID_STATION)
1230                         return sta_id;
1231                 return priv->hw_params.bcast_sta_id;
1232
1233         /* If this frame is going out to an IBSS network, find the station,
1234          * or create a new station table entry */
1235         case NL80211_IFTYPE_ADHOC:
1236                 sta_id = iwl_find_station(priv, hdr->addr1);
1237                 if (sta_id != IWL_INVALID_STATION)
1238                         return sta_id;
1239
1240                 /* Create new station table entry */
1241                 sta_id = iwl_add_station(priv, hdr->addr1, false,
1242                                         CMD_ASYNC, NULL);
1243
1244                 if (sta_id != IWL_INVALID_STATION)
1245                         return sta_id;
1246
1247                 IWL_DEBUG_DROP(priv, "Station %pM not in station map. "
1248                                "Defaulting to broadcast...\n",
1249                                hdr->addr1);
1250                 iwl_print_hex_dump(priv, IWL_DL_DROP, (u8 *) hdr, sizeof(*hdr));
1251                 return priv->hw_params.bcast_sta_id;
1252
1253         default:
1254                 IWL_WARN(priv, "Unknown mode of operation: %d\n",
1255                         priv->iw_mode);
1256                 return priv->hw_params.bcast_sta_id;
1257         }
1258 }
1259 EXPORT_SYMBOL(iwl_get_sta_id);
1260
1261 /**
1262  * iwl_sta_tx_modify_enable_tid - Enable Tx for this TID in station table
1263  */
1264 void iwl_sta_tx_modify_enable_tid(struct iwl_priv *priv, int sta_id, int tid)
1265 {
1266         unsigned long flags;
1267
1268         /* Remove "disable" flag, to enable Tx for this TID */
1269         spin_lock_irqsave(&priv->sta_lock, flags);
1270         priv->stations[sta_id].sta.sta.modify_mask = STA_MODIFY_TID_DISABLE_TX;
1271         priv->stations[sta_id].sta.tid_disable_tx &= cpu_to_le16(~(1 << tid));
1272         priv->stations[sta_id].sta.mode = STA_CONTROL_MODIFY_MSK;
1273         spin_unlock_irqrestore(&priv->sta_lock, flags);
1274
1275         iwl_send_add_sta(priv, &priv->stations[sta_id].sta, CMD_ASYNC);
1276 }
1277 EXPORT_SYMBOL(iwl_sta_tx_modify_enable_tid);
1278
1279 int iwl_sta_rx_agg_start(struct iwl_priv *priv,
1280                          const u8 *addr, int tid, u16 ssn)
1281 {
1282         unsigned long flags;
1283         int sta_id;
1284
1285         sta_id = iwl_find_station(priv, addr);
1286         if (sta_id == IWL_INVALID_STATION)
1287                 return -ENXIO;
1288
1289         spin_lock_irqsave(&priv->sta_lock, flags);
1290         priv->stations[sta_id].sta.station_flags_msk = 0;
1291         priv->stations[sta_id].sta.sta.modify_mask = STA_MODIFY_ADDBA_TID_MSK;
1292         priv->stations[sta_id].sta.add_immediate_ba_tid = (u8)tid;
1293         priv->stations[sta_id].sta.add_immediate_ba_ssn = cpu_to_le16(ssn);
1294         priv->stations[sta_id].sta.mode = STA_CONTROL_MODIFY_MSK;
1295         spin_unlock_irqrestore(&priv->sta_lock, flags);
1296
1297         return iwl_send_add_sta(priv, &priv->stations[sta_id].sta,
1298                                         CMD_ASYNC);
1299 }
1300 EXPORT_SYMBOL(iwl_sta_rx_agg_start);
1301
1302 int iwl_sta_rx_agg_stop(struct iwl_priv *priv, const u8 *addr, int tid)
1303 {
1304         unsigned long flags;
1305         int sta_id;
1306
1307         sta_id = iwl_find_station(priv, addr);
1308         if (sta_id == IWL_INVALID_STATION) {
1309                 IWL_ERR(priv, "Invalid station for AGG tid %d\n", tid);
1310                 return -ENXIO;
1311         }
1312
1313         spin_lock_irqsave(&priv->sta_lock, flags);
1314         priv->stations[sta_id].sta.station_flags_msk = 0;
1315         priv->stations[sta_id].sta.sta.modify_mask = STA_MODIFY_DELBA_TID_MSK;
1316         priv->stations[sta_id].sta.remove_immediate_ba_tid = (u8)tid;
1317         priv->stations[sta_id].sta.mode = STA_CONTROL_MODIFY_MSK;
1318         spin_unlock_irqrestore(&priv->sta_lock, flags);
1319
1320         return iwl_send_add_sta(priv, &priv->stations[sta_id].sta,
1321                                         CMD_ASYNC);
1322 }
1323 EXPORT_SYMBOL(iwl_sta_rx_agg_stop);
1324
1325 void iwl_sta_modify_ps_wake(struct iwl_priv *priv, int sta_id)
1326 {
1327         unsigned long flags;
1328
1329         spin_lock_irqsave(&priv->sta_lock, flags);
1330         priv->stations[sta_id].sta.station_flags &= ~STA_FLG_PWR_SAVE_MSK;
1331         priv->stations[sta_id].sta.station_flags_msk = STA_FLG_PWR_SAVE_MSK;
1332         priv->stations[sta_id].sta.sta.modify_mask = 0;
1333         priv->stations[sta_id].sta.sleep_tx_count = 0;
1334         priv->stations[sta_id].sta.mode = STA_CONTROL_MODIFY_MSK;
1335         spin_unlock_irqrestore(&priv->sta_lock, flags);
1336
1337         iwl_send_add_sta(priv, &priv->stations[sta_id].sta, CMD_ASYNC);
1338 }
1339 EXPORT_SYMBOL(iwl_sta_modify_ps_wake);
1340
1341 void iwl_sta_modify_sleep_tx_count(struct iwl_priv *priv, int sta_id, int cnt)
1342 {
1343         unsigned long flags;
1344
1345         spin_lock_irqsave(&priv->sta_lock, flags);
1346         priv->stations[sta_id].sta.station_flags |= STA_FLG_PWR_SAVE_MSK;
1347         priv->stations[sta_id].sta.station_flags_msk = STA_FLG_PWR_SAVE_MSK;
1348         priv->stations[sta_id].sta.sta.modify_mask =
1349                                         STA_MODIFY_SLEEP_TX_COUNT_MSK;
1350         priv->stations[sta_id].sta.sleep_tx_count = cpu_to_le16(cnt);
1351         priv->stations[sta_id].sta.mode = STA_CONTROL_MODIFY_MSK;
1352         spin_unlock_irqrestore(&priv->sta_lock, flags);
1353
1354         iwl_send_add_sta(priv, &priv->stations[sta_id].sta, CMD_ASYNC);
1355 }