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