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

   1 /******************************************************************************
   2  *
   3  * Copyright(c) 2003 - 2011 Intel Corporation. All rights reserved.
   4  *
   5  * Portions of this file are derived from the ipw3945 project, as well
   6  * as portions of the ieee80211 subsystem header files.
   7  *
   8  * This program is free software; you can redistribute it and/or modify it
   9  * under the terms of version 2 of the GNU General Public License as
  10  * published by the Free Software Foundation.
  11  *
  12  * This program is distributed in the hope that it will be useful, but WITHOUT
  13  * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
  14  * FITNESS FOR A PARTICULAR PURPOSE.  See the GNU General Public License for
  15  * more details.
  16  *
  17  * You should have received a copy of the GNU General Public License along with
  18  * this program; if not, write to the Free Software Foundation, Inc.,
  19  * 51 Franklin Street, Fifth Floor, Boston, MA 02110, USA
  20  *
  21  * The full GNU General Public License is included in this distribution in the
  22  * file called LICENSE.
  23  *
  24  * Contact Information:
  25  *  Intel Linux Wireless <ilw@linux.intel.com>
  26  * Intel Corporation, 5200 N.E. Elam Young Parkway, Hillsboro, OR 97124-6497
  27  *
  28  *****************************************************************************/
  29
  30 #include <net/mac80211.h>
  31
  32 #include "iwl-dev.h"
  33 #include "iwl-core.h"
  34 #include "iwl-agn.h"
  35 #include "iwl-trans.h"
  36
  37 /* priv->shrd->sta_lock must be held */
  38 static void iwl_sta_ucode_activate(struct iwl_priv *priv, u8 sta_id)
  39 {
  40
  41         if (!(priv->stations[sta_id].used & IWL_STA_DRIVER_ACTIVE))
  42                 IWL_ERR(priv, "ACTIVATE a non DRIVER active station id %u "
  43                         "addr %pM\n",
  44                         sta_id, priv->stations[sta_id].sta.sta.addr);
  45
  46         if (priv->stations[sta_id].used & IWL_STA_UCODE_ACTIVE) {
  47                 IWL_DEBUG_ASSOC(priv,
  48                                 "STA id %u addr %pM already present in uCode "
  49                                 "(according to driver)\n",
  50                                 sta_id, priv->stations[sta_id].sta.sta.addr);
  51         } else {
  52                 priv->stations[sta_id].used |= IWL_STA_UCODE_ACTIVE;
  53                 IWL_DEBUG_ASSOC(priv, "Added STA id %u addr %pM to uCode\n",
  54                                 sta_id, priv->stations[sta_id].sta.sta.addr);
  55         }
  56 }
  57
  58 static int iwl_process_add_sta_resp(struct iwl_priv *priv,
  59                                     struct iwl_addsta_cmd *addsta,
  60                                     struct iwl_rx_packet *pkt)
  61 {
  62         u8 sta_id = addsta->sta.sta_id;
  63         unsigned long flags;
  64         int ret = -EIO;
  65
  66         if (pkt->hdr.flags & IWL_CMD_FAILED_MSK) {
  67                 IWL_ERR(priv, "Bad return from REPLY_ADD_STA (0x%08X)\n",
  68                         pkt->hdr.flags);
  69                 return ret;
  70         }
  71
  72         IWL_DEBUG_INFO(priv, "Processing response for adding station %u\n",
  73                        sta_id);
  74
  75         spin_lock_irqsave(&priv->shrd->sta_lock, flags);
  76
  77         switch (pkt->u.add_sta.status) {
  78         case ADD_STA_SUCCESS_MSK:
  79                 IWL_DEBUG_INFO(priv, "REPLY_ADD_STA PASSED\n");
  80                 iwl_sta_ucode_activate(priv, sta_id);
  81                 ret = 0;
  82                 break;
  83         case ADD_STA_NO_ROOM_IN_TABLE:
  84                 IWL_ERR(priv, "Adding station %d failed, no room in table.\n",
  85                         sta_id);
  86                 break;
  87         case ADD_STA_NO_BLOCK_ACK_RESOURCE:
  88                 IWL_ERR(priv, "Adding station %d failed, no block ack "
  89                         "resource.\n", sta_id);
  90                 break;
  91         case ADD_STA_MODIFY_NON_EXIST_STA:
  92                 IWL_ERR(priv, "Attempting to modify non-existing station %d\n",
  93                         sta_id);
  94                 break;
  95         default:
  96                 IWL_DEBUG_ASSOC(priv, "Received REPLY_ADD_STA:(0x%08X)\n",
  97                                 pkt->u.add_sta.status);
  98                 break;
  99         }
 100
 101         IWL_DEBUG_INFO(priv, "%s station id %u addr %pM\n",
 102                        priv->stations[sta_id].sta.mode ==
 103                        STA_CONTROL_MODIFY_MSK ?  "Modified" : "Added",
 104                        sta_id, priv->stations[sta_id].sta.sta.addr);
 105
 106         /*
 107          * XXX: The MAC address in the command buffer is often changed from
 108          * the original sent to the device. That is, the MAC address
 109          * written to the command buffer often is not the same MAC address
 110          * read from the command buffer when the command returns. This
 111          * issue has not yet been resolved and this debugging is left to
 112          * observe the problem.
 113          */
 114         IWL_DEBUG_INFO(priv, "%s station according to cmd buffer %pM\n",
 115                        priv->stations[sta_id].sta.mode ==
 116                        STA_CONTROL_MODIFY_MSK ? "Modified" : "Added",
 117                        addsta->sta.addr);
 118         spin_unlock_irqrestore(&priv->shrd->sta_lock, flags);
 119
 120         return ret;
 121 }
 122
 123 int iwl_add_sta_callback(struct iwl_priv *priv, struct iwl_rx_mem_buffer *rxb,
 124                                struct iwl_device_cmd *cmd)
 125 {
 126         struct iwl_rx_packet *pkt = rxb_addr(rxb);
 127         struct iwl_addsta_cmd *addsta =
 128                 (struct iwl_addsta_cmd *) cmd->payload;
 129
 130         return iwl_process_add_sta_resp(priv, addsta, pkt);
 131 }
 132
 133 static u16 iwlagn_build_addsta_hcmd(const struct iwl_addsta_cmd *cmd, u8 *data)
 134 {
 135         u16 size = (u16)sizeof(struct iwl_addsta_cmd);
 136         struct iwl_addsta_cmd *addsta = (struct iwl_addsta_cmd *)data;
 137         memcpy(addsta, cmd, size);
 138         /* resrved in 5000 */
 139         addsta->rate_n_flags = cpu_to_le16(0);
 140         return size;
 141 }
 142
 143 int iwl_send_add_sta(struct iwl_priv *priv,
 144                      struct iwl_addsta_cmd *sta, u8 flags)
 145 {
 146         int ret = 0;
 147         u8 data[sizeof(*sta)];
 148         struct iwl_host_cmd cmd = {
 149                 .id = REPLY_ADD_STA,
 150                 .flags = flags,
 151                 .data = { data, },
 152         };
 153         u8 sta_id __maybe_unused = sta->sta.sta_id;
 154
 155         IWL_DEBUG_INFO(priv, "Adding sta %u (%pM) %ssynchronously\n",
 156                        sta_id, sta->sta.addr, flags & CMD_ASYNC ?  "a" : "");
 157
 158         if (!(flags & CMD_ASYNC)) {
 159                 cmd.flags |= CMD_WANT_SKB;
 160                 might_sleep();
 161         }
 162
 163         cmd.len[0] = iwlagn_build_addsta_hcmd(sta, data);
 164         ret = iwl_trans_send_cmd(trans(priv), &cmd);
 165
 166         if (ret || (flags & CMD_ASYNC))
 167                 return ret;
 168         /*else the command was successfully sent in SYNC mode, need to free
 169          * the reply page */
 170
 171         iwl_free_pages(priv->shrd, cmd.reply_page);
 172
 173         if (cmd.handler_status)
 174                 IWL_ERR(priv, "%s - error in the CMD response %d", __func__,
 175                         cmd.handler_status);
 176
 177         return cmd.handler_status;
 178 }
 179
 180 static void iwl_set_ht_add_station(struct iwl_priv *priv, u8 index,
 181                                    struct ieee80211_sta *sta,
 182                                    struct iwl_rxon_context *ctx)
 183 {
 184         struct ieee80211_sta_ht_cap *sta_ht_inf = &sta->ht_cap;
 185         __le32 sta_flags;
 186         u8 mimo_ps_mode;
 187
 188         if (!sta || !sta_ht_inf->ht_supported)
 189                 goto done;
 190
 191         mimo_ps_mode = (sta_ht_inf->cap & IEEE80211_HT_CAP_SM_PS) >> 2;
 192         IWL_DEBUG_ASSOC(priv, "spatial multiplexing power save mode: %s\n",
 193                         (mimo_ps_mode == WLAN_HT_CAP_SM_PS_STATIC) ?
 194                         "static" :
 195                         (mimo_ps_mode == WLAN_HT_CAP_SM_PS_DYNAMIC) ?
 196                         "dynamic" : "disabled");
 197
 198         sta_flags = priv->stations[index].sta.station_flags;
 199
 200         sta_flags &= ~(STA_FLG_RTS_MIMO_PROT_MSK | STA_FLG_MIMO_DIS_MSK);
 201
 202         switch (mimo_ps_mode) {
 203         case WLAN_HT_CAP_SM_PS_STATIC:
 204                 sta_flags |= STA_FLG_MIMO_DIS_MSK;
 205                 break;
 206         case WLAN_HT_CAP_SM_PS_DYNAMIC:
 207                 sta_flags |= STA_FLG_RTS_MIMO_PROT_MSK;
 208                 break;
 209         case WLAN_HT_CAP_SM_PS_DISABLED:
 210                 break;
 211         default:
 212                 IWL_WARN(priv, "Invalid MIMO PS mode %d\n", mimo_ps_mode);
 213                 break;
 214         }
 215
 216         sta_flags |= cpu_to_le32(
 217               (u32)sta_ht_inf->ampdu_factor << STA_FLG_MAX_AGG_SIZE_POS);
 218
 219         sta_flags |= cpu_to_le32(
 220               (u32)sta_ht_inf->ampdu_density << STA_FLG_AGG_MPDU_DENSITY_POS);
 221
 222         if (iwl_is_ht40_tx_allowed(priv, ctx, &sta->ht_cap))
 223                 sta_flags |= STA_FLG_HT40_EN_MSK;
 224         else
 225                 sta_flags &= ~STA_FLG_HT40_EN_MSK;
 226
 227         priv->stations[index].sta.station_flags = sta_flags;
 228  done:
 229         return;
 230 }
 231
 232 /**
 233  * iwl_prep_station - Prepare station information for addition
 234  *
 235  * should be called with sta_lock held
 236  */
 237 u8 iwl_prep_station(struct iwl_priv *priv, struct iwl_rxon_context *ctx,
 238                     const u8 *addr, bool is_ap, struct ieee80211_sta *sta)
 239 {
 240         struct iwl_station_entry *station;
 241         int i;
 242         u8 sta_id = IWL_INVALID_STATION;
 243
 244         if (is_ap)
 245                 sta_id = ctx->ap_sta_id;
 246         else if (is_broadcast_ether_addr(addr))
 247                 sta_id = ctx->bcast_sta_id;
 248         else
 249                 for (i = IWL_STA_ID; i < IWLAGN_STATION_COUNT; i++) {
 250                         if (!compare_ether_addr(priv->stations[i].sta.sta.addr,
 251                                                 addr)) {
 252                                 sta_id = i;
 253                                 break;
 254                         }
 255
 256                         if (!priv->stations[i].used &&
 257                             sta_id == IWL_INVALID_STATION)
 258                                 sta_id = i;
 259                 }
 260
 261         /*
 262          * These two conditions have the same outcome, but keep them
 263          * separate
 264          */
 265         if (unlikely(sta_id == IWL_INVALID_STATION))
 266                 return sta_id;
 267
 268         /*
 269          * uCode is not able to deal with multiple requests to add a
 270          * station. Keep track if one is in progress so that we do not send
 271          * another.
 272          */
 273         if (priv->stations[sta_id].used & IWL_STA_UCODE_INPROGRESS) {
 274                 IWL_DEBUG_INFO(priv, "STA %d already in process of being "
 275                                "added.\n", sta_id);
 276                 return sta_id;
 277         }
 278
 279         if ((priv->stations[sta_id].used & IWL_STA_DRIVER_ACTIVE) &&
 280             (priv->stations[sta_id].used & IWL_STA_UCODE_ACTIVE) &&
 281             !compare_ether_addr(priv->stations[sta_id].sta.sta.addr, addr)) {
 282                 IWL_DEBUG_ASSOC(priv, "STA %d (%pM) already added, not "
 283                                 "adding again.\n", sta_id, addr);
 284                 return sta_id;
 285         }
 286
 287         station = &priv->stations[sta_id];
 288         station->used = IWL_STA_DRIVER_ACTIVE;
 289         IWL_DEBUG_ASSOC(priv, "Add STA to driver ID %d: %pM\n",
 290                         sta_id, addr);
 291         priv->num_stations++;
 292
 293         /* Set up the REPLY_ADD_STA command to send to device */
 294         memset(&station->sta, 0, sizeof(struct iwl_addsta_cmd));
 295         memcpy(station->sta.sta.addr, addr, ETH_ALEN);
 296         station->sta.mode = 0;
 297         station->sta.sta.sta_id = sta_id;
 298         station->sta.station_flags = ctx->station_flags;
 299         station->ctxid = ctx->ctxid;
 300
 301         if (sta) {
 302                 struct iwl_station_priv *sta_priv;
 303
 304                 sta_priv = (void *)sta->drv_priv;
 305                 sta_priv->ctx = ctx;
 306         }
 307
 308         /*
 309          * OK to call unconditionally, since local stations (IBSS BSSID
 310          * STA and broadcast STA) pass in a NULL sta, and mac80211
 311          * doesn't allow HT IBSS.
 312          */
 313         iwl_set_ht_add_station(priv, sta_id, sta, ctx);
 314
 315         return sta_id;
 316
 317 }
 318
 319 #define STA_WAIT_TIMEOUT (HZ/2)
 320
 321 /**
 322  * iwl_add_station_common -
 323  */
 324 int iwl_add_station_common(struct iwl_priv *priv, struct iwl_rxon_context *ctx,
 325                            const u8 *addr, bool is_ap,
 326                            struct ieee80211_sta *sta, u8 *sta_id_r)
 327 {
 328         unsigned long flags_spin;
 329         int ret = 0;
 330         u8 sta_id;
 331         struct iwl_addsta_cmd sta_cmd;
 332
 333         *sta_id_r = 0;
 334         spin_lock_irqsave(&priv->shrd->sta_lock, flags_spin);
 335         sta_id = iwl_prep_station(priv, ctx, addr, is_ap, sta);
 336         if (sta_id == IWL_INVALID_STATION) {
 337                 IWL_ERR(priv, "Unable to prepare station %pM for addition\n",
 338                         addr);
 339                 spin_unlock_irqrestore(&priv->shrd->sta_lock, flags_spin);
 340                 return -EINVAL;
 341         }
 342
 343         /*
 344          * uCode is not able to deal with multiple requests to add a
 345          * station. Keep track if one is in progress so that we do not send
 346          * another.
 347          */
 348         if (priv->stations[sta_id].used & IWL_STA_UCODE_INPROGRESS) {
 349                 IWL_DEBUG_INFO(priv, "STA %d already in process of being "
 350                                "added.\n", sta_id);
 351                 spin_unlock_irqrestore(&priv->shrd->sta_lock, flags_spin);
 352                 return -EEXIST;
 353         }
 354
 355         if ((priv->stations[sta_id].used & IWL_STA_DRIVER_ACTIVE) &&
 356             (priv->stations[sta_id].used & IWL_STA_UCODE_ACTIVE)) {
 357                 IWL_DEBUG_ASSOC(priv, "STA %d (%pM) already added, not "
 358                                 "adding again.\n", sta_id, addr);
 359                 spin_unlock_irqrestore(&priv->shrd->sta_lock, flags_spin);
 360                 return -EEXIST;
 361         }
 362
 363         priv->stations[sta_id].used |= IWL_STA_UCODE_INPROGRESS;
 364         memcpy(&sta_cmd, &priv->stations[sta_id].sta,
 365                sizeof(struct iwl_addsta_cmd));
 366         spin_unlock_irqrestore(&priv->shrd->sta_lock, flags_spin);
 367
 368         /* Add station to device's station table */
 369         ret = iwl_send_add_sta(priv, &sta_cmd, CMD_SYNC);
 370         if (ret) {
 371                 spin_lock_irqsave(&priv->shrd->sta_lock, flags_spin);
 372                 IWL_ERR(priv, "Adding station %pM failed.\n",
 373                         priv->stations[sta_id].sta.sta.addr);
 374                 priv->stations[sta_id].used &= ~IWL_STA_DRIVER_ACTIVE;
 375                 priv->stations[sta_id].used &= ~IWL_STA_UCODE_INPROGRESS;
 376                 spin_unlock_irqrestore(&priv->shrd->sta_lock, flags_spin);
 377         }
 378         *sta_id_r = sta_id;
 379         return ret;
 380 }
 381
 382 /**
 383  * iwl_sta_ucode_deactivate - deactivate ucode status for a station
 384  *
 385  * priv->shrd->sta_lock must be held
 386  */
 387 static void iwl_sta_ucode_deactivate(struct iwl_priv *priv, u8 sta_id)
 388 {
 389         /* Ucode must be active and driver must be non active */
 390         if ((priv->stations[sta_id].used &
 391              (IWL_STA_UCODE_ACTIVE | IWL_STA_DRIVER_ACTIVE)) !=
 392               IWL_STA_UCODE_ACTIVE)
 393                 IWL_ERR(priv, "removed non active STA %u\n", sta_id);
 394
 395         priv->stations[sta_id].used &= ~IWL_STA_UCODE_ACTIVE;
 396
 397         memset(&priv->stations[sta_id], 0, sizeof(struct iwl_station_entry));
 398         IWL_DEBUG_ASSOC(priv, "Removed STA %u\n", sta_id);
 399 }
 400
 401 static int iwl_send_remove_station(struct iwl_priv *priv,
 402                                    const u8 *addr, int sta_id,
 403                                    bool temporary)
 404 {
 405         struct iwl_rx_packet *pkt;
 406         int ret;
 407
 408         unsigned long flags_spin;
 409         struct iwl_rem_sta_cmd rm_sta_cmd;
 410
 411         struct iwl_host_cmd cmd = {
 412                 .id = REPLY_REMOVE_STA,
 413                 .len = { sizeof(struct iwl_rem_sta_cmd), },
 414                 .flags = CMD_SYNC,
 415                 .data = { &rm_sta_cmd, },
 416         };
 417
 418         memset(&rm_sta_cmd, 0, sizeof(rm_sta_cmd));
 419         rm_sta_cmd.num_sta = 1;
 420         memcpy(&rm_sta_cmd.addr, addr, ETH_ALEN);
 421
 422         cmd.flags |= CMD_WANT_SKB;
 423
 424         ret = iwl_trans_send_cmd(trans(priv), &cmd);
 425
 426         if (ret)
 427                 return ret;
 428
 429         pkt = (struct iwl_rx_packet *)cmd.reply_page;
 430         if (pkt->hdr.flags & IWL_CMD_FAILED_MSK) {
 431                 IWL_ERR(priv, "Bad return from REPLY_REMOVE_STA (0x%08X)\n",
 432                           pkt->hdr.flags);
 433                 ret = -EIO;
 434         }
 435
 436         if (!ret) {
 437                 switch (pkt->u.rem_sta.status) {
 438                 case REM_STA_SUCCESS_MSK:
 439                         if (!temporary) {
 440                                 spin_lock_irqsave(&priv->shrd->sta_lock,
 441                                         flags_spin);
 442                                 iwl_sta_ucode_deactivate(priv, sta_id);
 443                                 spin_unlock_irqrestore(&priv->shrd->sta_lock,
 444                                         flags_spin);
 445                         }
 446                         IWL_DEBUG_ASSOC(priv, "REPLY_REMOVE_STA PASSED\n");
 447                         break;
 448                 default:
 449                         ret = -EIO;
 450                         IWL_ERR(priv, "REPLY_REMOVE_STA failed\n");
 451                         break;
 452                 }
 453         }
 454         iwl_free_pages(priv->shrd, cmd.reply_page);
 455
 456         return ret;
 457 }
 458
 459 /**
 460  * iwl_remove_station - Remove driver's knowledge of station.
 461  */
 462 int iwl_remove_station(struct iwl_priv *priv, const u8 sta_id,
 463                        const u8 *addr)
 464 {
 465         unsigned long flags;
 466
 467         if (!iwl_is_ready(priv->shrd)) {
 468                 IWL_DEBUG_INFO(priv,
 469                         "Unable to remove station %pM, device not ready.\n",
 470                         addr);
 471                 /*
 472                  * It is typical for stations to be removed when we are
 473                  * going down. Return success since device will be down
 474                  * soon anyway
 475                  */
 476                 return 0;
 477         }
 478
 479         IWL_DEBUG_ASSOC(priv, "Removing STA from driver:%d  %pM\n",
 480                         sta_id, addr);
 481
 482         if (WARN_ON(sta_id == IWL_INVALID_STATION))
 483                 return -EINVAL;
 484
 485         spin_lock_irqsave(&priv->shrd->sta_lock, flags);
 486
 487         if (!(priv->stations[sta_id].used & IWL_STA_DRIVER_ACTIVE)) {
 488                 IWL_DEBUG_INFO(priv, "Removing %pM but non DRIVER active\n",
 489                                 addr);
 490                 goto out_err;
 491         }
 492
 493         if (!(priv->stations[sta_id].used & IWL_STA_UCODE_ACTIVE)) {
 494                 IWL_DEBUG_INFO(priv, "Removing %pM but non UCODE active\n",
 495                                 addr);
 496                 goto out_err;
 497         }
 498
 499         if (priv->stations[sta_id].used & IWL_STA_LOCAL) {
 500                 kfree(priv->stations[sta_id].lq);
 501                 priv->stations[sta_id].lq = NULL;
 502         }
 503
 504         priv->stations[sta_id].used &= ~IWL_STA_DRIVER_ACTIVE;
 505
 506         priv->num_stations--;
 507
 508         if (WARN_ON(priv->num_stations < 0))
 509                 priv->num_stations = 0;
 510
 511         spin_unlock_irqrestore(&priv->shrd->sta_lock, flags);
 512
 513         return iwl_send_remove_station(priv, addr, sta_id, false);
 514 out_err:
 515         spin_unlock_irqrestore(&priv->shrd->sta_lock, flags);
 516         return -EINVAL;
 517 }
 518
 519 /**
 520  * iwl_clear_ucode_stations - clear ucode station table bits
 521  *
 522  * This function clears all the bits in the driver indicating
 523  * which stations are active in the ucode. Call when something
 524  * other than explicit station management would cause this in
 525  * the ucode, e.g. unassociated RXON.
 526  */
 527 void iwl_clear_ucode_stations(struct iwl_priv *priv,
 528                               struct iwl_rxon_context *ctx)
 529 {
 530         int i;
 531         unsigned long flags_spin;
 532         bool cleared = false;
 533
 534         IWL_DEBUG_INFO(priv, "Clearing ucode stations in driver\n");
 535
 536         spin_lock_irqsave(&priv->shrd->sta_lock, flags_spin);
 537         for (i = 0; i < IWLAGN_STATION_COUNT; i++) {
 538                 if (ctx && ctx->ctxid != priv->stations[i].ctxid)
 539                         continue;
 540
 541                 if (priv->stations[i].used & IWL_STA_UCODE_ACTIVE) {
 542                         IWL_DEBUG_INFO(priv,
 543                                 "Clearing ucode active for station %d\n", i);
 544                         priv->stations[i].used &= ~IWL_STA_UCODE_ACTIVE;
 545                         cleared = true;
 546                 }
 547         }
 548         spin_unlock_irqrestore(&priv->shrd->sta_lock, flags_spin);
 549
 550         if (!cleared)
 551                 IWL_DEBUG_INFO(priv,
 552                                "No active stations found to be cleared\n");
 553 }
 554
 555 /**
 556  * iwl_restore_stations() - Restore driver known stations to device
 557  *
 558  * All stations considered active by driver, but not present in ucode, is
 559  * restored.
 560  *
 561  * Function sleeps.
 562  */
 563 void iwl_restore_stations(struct iwl_priv *priv, struct iwl_rxon_context *ctx)
 564 {
 565         struct iwl_addsta_cmd sta_cmd;
 566         struct iwl_link_quality_cmd lq;
 567         unsigned long flags_spin;
 568         int i;
 569         bool found = false;
 570         int ret;
 571         bool send_lq;
 572
 573         if (!iwl_is_ready(priv->shrd)) {
 574                 IWL_DEBUG_INFO(priv,
 575                                "Not ready yet, not restoring any stations.\n");
 576                 return;
 577         }
 578
 579         IWL_DEBUG_ASSOC(priv, "Restoring all known stations ... start.\n");
 580         spin_lock_irqsave(&priv->shrd->sta_lock, flags_spin);
 581         for (i = 0; i < IWLAGN_STATION_COUNT; i++) {
 582                 if (ctx->ctxid != priv->stations[i].ctxid)
 583                         continue;
 584                 if ((priv->stations[i].used & IWL_STA_DRIVER_ACTIVE) &&
 585                             !(priv->stations[i].used & IWL_STA_UCODE_ACTIVE)) {
 586                         IWL_DEBUG_ASSOC(priv, "Restoring sta %pM\n",
 587                                         priv->stations[i].sta.sta.addr);
 588                         priv->stations[i].sta.mode = 0;
 589                         priv->stations[i].used |= IWL_STA_UCODE_INPROGRESS;
 590                         found = true;
 591                 }
 592         }
 593
 594         for (i = 0; i < IWLAGN_STATION_COUNT; i++) {
 595                 if ((priv->stations[i].used & IWL_STA_UCODE_INPROGRESS)) {
 596                         memcpy(&sta_cmd, &priv->stations[i].sta,
 597                                sizeof(struct iwl_addsta_cmd));
 598                         send_lq = false;
 599                         if (priv->stations[i].lq) {
 600                                 if (priv->shrd->wowlan)
 601                                         iwl_sta_fill_lq(priv, ctx, i, &lq);
 602                                 else
 603                                         memcpy(&lq, priv->stations[i].lq,
 604                                                sizeof(struct iwl_link_quality_cmd));
 605                                 send_lq = true;
 606                         }
 607                         spin_unlock_irqrestore(&priv->shrd->sta_lock,
 608                                                flags_spin);
 609                         ret = iwl_send_add_sta(priv, &sta_cmd, CMD_SYNC);
 610                         if (ret) {
 611                                 spin_lock_irqsave(&priv->shrd->sta_lock,
 612                                                   flags_spin);
 613                                 IWL_ERR(priv, "Adding station %pM failed.\n",
 614                                         priv->stations[i].sta.sta.addr);
 615                                 priv->stations[i].used &=
 616                                                 ~IWL_STA_DRIVER_ACTIVE;
 617                                 priv->stations[i].used &=
 618                                                 ~IWL_STA_UCODE_INPROGRESS;
 619                                 spin_unlock_irqrestore(&priv->shrd->sta_lock,
 620                                                        flags_spin);
 621                         }
 622                         /*
 623                          * Rate scaling has already been initialized, send
 624                          * current LQ command
 625                          */
 626                         if (send_lq)
 627                                 iwl_send_lq_cmd(priv, ctx, &lq,
 628                                                 CMD_SYNC, true);
 629                         spin_lock_irqsave(&priv->shrd->sta_lock, flags_spin);
 630                         priv->stations[i].used &= ~IWL_STA_UCODE_INPROGRESS;
 631                 }
 632         }
 633
 634         spin_unlock_irqrestore(&priv->shrd->sta_lock, flags_spin);
 635         if (!found)
 636                 IWL_DEBUG_INFO(priv, "Restoring all known stations .... "
 637                         "no stations to be restored.\n");
 638         else
 639                 IWL_DEBUG_INFO(priv, "Restoring all known stations .... "
 640                         "complete.\n");
 641 }
 642
 643 void iwl_reprogram_ap_sta(struct iwl_priv *priv, struct iwl_rxon_context *ctx)
 644 {
 645         unsigned long flags;
 646         int sta_id = ctx->ap_sta_id;
 647         int ret;
 648         struct iwl_addsta_cmd sta_cmd;
 649         struct iwl_link_quality_cmd lq;
 650         bool active;
 651
 652         spin_lock_irqsave(&priv->shrd->sta_lock, flags);
 653         if (!(priv->stations[sta_id].used & IWL_STA_DRIVER_ACTIVE)) {
 654                 spin_unlock_irqrestore(&priv->shrd->sta_lock, flags);
 655                 return;
 656         }
 657
 658         memcpy(&sta_cmd, &priv->stations[sta_id].sta, sizeof(sta_cmd));
 659         sta_cmd.mode = 0;
 660         memcpy(&lq, priv->stations[sta_id].lq, sizeof(lq));
 661
 662         active = priv->stations[sta_id].used & IWL_STA_UCODE_ACTIVE;
 663         priv->stations[sta_id].used &= ~IWL_STA_DRIVER_ACTIVE;
 664         spin_unlock_irqrestore(&priv->shrd->sta_lock, flags);
 665
 666         if (active) {
 667                 ret = iwl_send_remove_station(
 668                         priv, priv->stations[sta_id].sta.sta.addr,
 669                         sta_id, true);
 670                 if (ret)
 671                         IWL_ERR(priv, "failed to remove STA %pM (%d)\n",
 672                                 priv->stations[sta_id].sta.sta.addr, ret);
 673         }
 674         spin_lock_irqsave(&priv->shrd->sta_lock, flags);
 675         priv->stations[sta_id].used |= IWL_STA_DRIVER_ACTIVE;
 676         spin_unlock_irqrestore(&priv->shrd->sta_lock, flags);
 677
 678         ret = iwl_send_add_sta(priv, &sta_cmd, CMD_SYNC);
 679         if (ret)
 680                 IWL_ERR(priv, "failed to re-add STA %pM (%d)\n",
 681                         priv->stations[sta_id].sta.sta.addr, ret);
 682         iwl_send_lq_cmd(priv, ctx, &lq, CMD_SYNC, true);
 683 }
 684
 685 int iwl_get_free_ucode_key_offset(struct iwl_priv *priv)
 686 {
 687         int i;
 688
 689         for (i = 0; i < priv->sta_key_max_num; i++)
 690                 if (!test_and_set_bit(i, &priv->ucode_key_table))
 691                         return i;
 692
 693         return WEP_INVALID_OFFSET;
 694 }
 695
 696 void iwl_dealloc_bcast_stations(struct iwl_priv *priv)
 697 {
 698         unsigned long flags;
 699         int i;
 700
 701         spin_lock_irqsave(&priv->shrd->sta_lock, flags);
 702         for (i = 0; i < IWLAGN_STATION_COUNT; i++) {
 703                 if (!(priv->stations[i].used & IWL_STA_BCAST))
 704                         continue;
 705
 706                 priv->stations[i].used &= ~IWL_STA_UCODE_ACTIVE;
 707                 priv->num_stations--;
 708                 if (WARN_ON(priv->num_stations < 0))
 709                         priv->num_stations = 0;
 710                 kfree(priv->stations[i].lq);
 711                 priv->stations[i].lq = NULL;
 712         }
 713         spin_unlock_irqrestore(&priv->shrd->sta_lock, flags);
 714 }
 715
 716 #ifdef CONFIG_IWLWIFI_DEBUG
 717 static void iwl_dump_lq_cmd(struct iwl_priv *priv,
 718                            struct iwl_link_quality_cmd *lq)
 719 {
 720         int i;
 721         IWL_DEBUG_RATE(priv, "lq station id 0x%x\n", lq->sta_id);
 722         IWL_DEBUG_RATE(priv, "lq ant 0x%X 0x%X\n",
 723                        lq->general_params.single_stream_ant_msk,
 724                        lq->general_params.dual_stream_ant_msk);
 725
 726         for (i = 0; i < LINK_QUAL_MAX_RETRY_NUM; i++)
 727                 IWL_DEBUG_RATE(priv, "lq index %d 0x%X\n",
 728                                i, lq->rs_table[i].rate_n_flags);
 729 }
 730 #else
 731 static inline void iwl_dump_lq_cmd(struct iwl_priv *priv,
 732                                    struct iwl_link_quality_cmd *lq)
 733 {
 734 }
 735 #endif
 736
 737 /**
 738  * is_lq_table_valid() - Test one aspect of LQ cmd for validity
 739  *
 740  * It sometimes happens when a HT rate has been in use and we
 741  * loose connectivity with AP then mac80211 will first tell us that the
 742  * current channel is not HT anymore before removing the station. In such a
 743  * scenario the RXON flags will be updated to indicate we are not
 744  * communicating HT anymore, but the LQ command may still contain HT rates.
 745  * Test for this to prevent driver from sending LQ command between the time
 746  * RXON flags are updated and when LQ command is updated.
 747  */
 748 static bool is_lq_table_valid(struct iwl_priv *priv,
 749                               struct iwl_rxon_context *ctx,
 750                               struct iwl_link_quality_cmd *lq)
 751 {
 752         int i;
 753
 754         if (ctx->ht.enabled)
 755                 return true;
 756
 757         IWL_DEBUG_INFO(priv, "Channel %u is not an HT channel\n",
 758                        ctx->active.channel);
 759         for (i = 0; i < LINK_QUAL_MAX_RETRY_NUM; i++) {
 760                 if (le32_to_cpu(lq->rs_table[i].rate_n_flags) &
 761                     RATE_MCS_HT_MSK) {
 762                         IWL_DEBUG_INFO(priv,
 763                                        "index %d of LQ expects HT channel\n",
 764                                        i);
 765                         return false;
 766                 }
 767         }
 768         return true;
 769 }
 770
 771 /**
 772  * iwl_send_lq_cmd() - Send link quality command
 773  * @init: This command is sent as part of station initialization right
 774  *        after station has been added.
 775  *
 776  * The link quality command is sent as the last step of station creation.
 777  * This is the special case in which init is set and we call a callback in
 778  * this case to clear the state indicating that station creation is in
 779  * progress.
 780  */
 781 int iwl_send_lq_cmd(struct iwl_priv *priv, struct iwl_rxon_context *ctx,
 782                     struct iwl_link_quality_cmd *lq, u8 flags, bool init)
 783 {
 784         int ret = 0;
 785         unsigned long flags_spin;
 786
 787         struct iwl_host_cmd cmd = {
 788                 .id = REPLY_TX_LINK_QUALITY_CMD,
 789                 .len = { sizeof(struct iwl_link_quality_cmd), },
 790                 .flags = flags,
 791                 .data = { lq, },
 792         };
 793
 794         if (WARN_ON(lq->sta_id == IWL_INVALID_STATION))
 795                 return -EINVAL;
 796
 797
 798         spin_lock_irqsave(&priv->shrd->sta_lock, flags_spin);
 799         if (!(priv->stations[lq->sta_id].used & IWL_STA_DRIVER_ACTIVE)) {
 800                 spin_unlock_irqrestore(&priv->shrd->sta_lock, flags_spin);
 801                 return -EINVAL;
 802         }
 803         spin_unlock_irqrestore(&priv->shrd->sta_lock, flags_spin);
 804
 805         iwl_dump_lq_cmd(priv, lq);
 806         if (WARN_ON(init && (cmd.flags & CMD_ASYNC)))
 807                 return -EINVAL;
 808
 809         if (is_lq_table_valid(priv, ctx, lq))
 810                 ret = iwl_trans_send_cmd(trans(priv), &cmd);
 811         else
 812                 ret = -EINVAL;
 813
 814         if (cmd.flags & CMD_ASYNC)
 815                 return ret;
 816
 817         if (init) {
 818                 IWL_DEBUG_INFO(priv, "init LQ command complete, "
 819                                "clearing sta addition status for sta %d\n",
 820                                lq->sta_id);
 821                 spin_lock_irqsave(&priv->shrd->sta_lock, flags_spin);
 822                 priv->stations[lq->sta_id].used &= ~IWL_STA_UCODE_INPROGRESS;
 823                 spin_unlock_irqrestore(&priv->shrd->sta_lock, flags_spin);
 824         }
 825         return ret;
 826 }
 827
 828 int iwlagn_mac_sta_remove(struct ieee80211_hw *hw,
 829                        struct ieee80211_vif *vif,
 830                        struct ieee80211_sta *sta)
 831 {
 832         struct iwl_priv *priv = hw->priv;
 833         struct iwl_station_priv *sta_priv = (void *)sta->drv_priv;
 834         int ret;
 835
 836         IWL_DEBUG_MAC80211(priv, "enter: received request to remove "
 837                            "station %pM\n", sta->addr);
 838         mutex_lock(&priv->shrd->mutex);
 839         IWL_DEBUG_INFO(priv, "proceeding to remove station %pM\n",
 840                         sta->addr);
 841         ret = iwl_remove_station(priv, sta_priv->sta_id, sta->addr);
 842         if (ret)
 843                 IWL_ERR(priv, "Error removing station %pM\n",
 844                         sta->addr);
 845         mutex_unlock(&priv->shrd->mutex);
 846         IWL_DEBUG_MAC80211(priv, "leave\n");
 847
 848         return ret;
 849 }
 850
 851 void iwl_sta_fill_lq(struct iwl_priv *priv, struct iwl_rxon_context *ctx,
 852                      u8 sta_id, struct iwl_link_quality_cmd *link_cmd)
 853 {
 854         int i, r;
 855         u32 rate_flags = 0;
 856         __le32 rate_n_flags;
 857
 858         lockdep_assert_held(&priv->shrd->mutex);
 859
 860         memset(link_cmd, 0, sizeof(*link_cmd));
 861
 862         /* Set up the rate scaling to start at selected rate, fall back
 863          * all the way down to 1M in IEEE order, and then spin on 1M */
 864         if (priv->band == IEEE80211_BAND_5GHZ)
 865                 r = IWL_RATE_6M_INDEX;
 866         else if (ctx && ctx->vif && ctx->vif->p2p)
 867                 r = IWL_RATE_6M_INDEX;
 868         else
 869                 r = IWL_RATE_1M_INDEX;
 870
 871         if (r >= IWL_FIRST_CCK_RATE && r <= IWL_LAST_CCK_RATE)
 872                 rate_flags |= RATE_MCS_CCK_MSK;
 873
 874         rate_flags |= first_antenna(hw_params(priv).valid_tx_ant) <<
 875                                 RATE_MCS_ANT_POS;
 876         rate_n_flags = iwl_hw_set_rate_n_flags(iwl_rates[r].plcp, rate_flags);
 877         for (i = 0; i < LINK_QUAL_MAX_RETRY_NUM; i++)
 878                 link_cmd->rs_table[i].rate_n_flags = rate_n_flags;
 879
 880         link_cmd->general_params.single_stream_ant_msk =
 881                         first_antenna(hw_params(priv).valid_tx_ant);
 882
 883         link_cmd->general_params.dual_stream_ant_msk =
 884                 hw_params(priv).valid_tx_ant &
 885                 ~first_antenna(hw_params(priv).valid_tx_ant);
 886         if (!link_cmd->general_params.dual_stream_ant_msk) {
 887                 link_cmd->general_params.dual_stream_ant_msk = ANT_AB;
 888         } else if (num_of_ant(hw_params(priv).valid_tx_ant) == 2) {
 889                 link_cmd->general_params.dual_stream_ant_msk =
 890                         hw_params(priv).valid_tx_ant;
 891         }
 892
 893         link_cmd->agg_params.agg_dis_start_th =
 894                 LINK_QUAL_AGG_DISABLE_START_DEF;
 895         link_cmd->agg_params.agg_time_limit =
 896                 cpu_to_le16(LINK_QUAL_AGG_TIME_LIMIT_DEF);
 897
 898         link_cmd->sta_id = sta_id;
 899 }
 900
 901 static struct iwl_link_quality_cmd *
 902 iwl_sta_alloc_lq(struct iwl_priv *priv, struct iwl_rxon_context *ctx,
 903                  u8 sta_id)
 904 {
 905         struct iwl_link_quality_cmd *link_cmd;
 906
 907         link_cmd = kzalloc(sizeof(struct iwl_link_quality_cmd), GFP_KERNEL);
 908         if (!link_cmd) {
 909                 IWL_ERR(priv, "Unable to allocate memory for LQ cmd.\n");
 910                 return NULL;
 911         }
 912
 913         iwl_sta_fill_lq(priv, ctx, sta_id, link_cmd);
 914
 915         return link_cmd;
 916 }
 917
 918 /*
 919  * iwlagn_add_bssid_station - Add the special IBSS BSSID station
 920  *
 921  * Function sleeps.
 922  */
 923 int iwlagn_add_bssid_station(struct iwl_priv *priv,
 924                              struct iwl_rxon_context *ctx,
 925                              const u8 *addr, u8 *sta_id_r)
 926 {
 927         int ret;
 928         u8 sta_id;
 929         struct iwl_link_quality_cmd *link_cmd;
 930         unsigned long flags;
 931
 932         if (sta_id_r)
 933                 *sta_id_r = IWL_INVALID_STATION;
 934
 935         ret = iwl_add_station_common(priv, ctx, addr, 0, NULL, &sta_id);
 936         if (ret) {
 937                 IWL_ERR(priv, "Unable to add station %pM\n", addr);
 938                 return ret;
 939         }
 940
 941         if (sta_id_r)
 942                 *sta_id_r = sta_id;
 943
 944         spin_lock_irqsave(&priv->shrd->sta_lock, flags);
 945         priv->stations[sta_id].used |= IWL_STA_LOCAL;
 946         spin_unlock_irqrestore(&priv->shrd->sta_lock, flags);
 947
 948         /* Set up default rate scaling table in device's station table */
 949         link_cmd = iwl_sta_alloc_lq(priv, ctx, sta_id);
 950         if (!link_cmd) {
 951                 IWL_ERR(priv,
 952                         "Unable to initialize rate scaling for station %pM.\n",
 953                         addr);
 954                 return -ENOMEM;
 955         }
 956
 957         ret = iwl_send_lq_cmd(priv, ctx, link_cmd, CMD_SYNC, true);
 958         if (ret)
 959                 IWL_ERR(priv, "Link quality command failed (%d)\n", ret);
 960
 961         spin_lock_irqsave(&priv->shrd->sta_lock, flags);
 962         priv->stations[sta_id].lq = link_cmd;
 963         spin_unlock_irqrestore(&priv->shrd->sta_lock, flags);
 964
 965         return 0;
 966 }
 967
 968 /*
 969  * static WEP keys
 970  *
 971  * For each context, the device has a table of 4 static WEP keys
 972  * (one for each key index) that is updated with the following
 973  * commands.
 974  */
 975
 976 static int iwl_send_static_wepkey_cmd(struct iwl_priv *priv,
 977                                       struct iwl_rxon_context *ctx,
 978                                       bool send_if_empty)
 979 {
 980         int i, not_empty = 0;
 981         u8 buff[sizeof(struct iwl_wep_cmd) +
 982                 sizeof(struct iwl_wep_key) * WEP_KEYS_MAX];
 983         struct iwl_wep_cmd *wep_cmd = (struct iwl_wep_cmd *)buff;
 984         size_t cmd_size  = sizeof(struct iwl_wep_cmd);
 985         struct iwl_host_cmd cmd = {
 986                 .id = ctx->wep_key_cmd,
 987                 .data = { wep_cmd, },
 988                 .flags = CMD_SYNC,
 989         };
 990
 991         might_sleep();
 992
 993         memset(wep_cmd, 0, cmd_size +
 994                         (sizeof(struct iwl_wep_key) * WEP_KEYS_MAX));
 995
 996         for (i = 0; i < WEP_KEYS_MAX ; i++) {
 997                 wep_cmd->key[i].key_index = i;
 998                 if (ctx->wep_keys[i].key_size) {
 999                         wep_cmd->key[i].key_offset = i;
1000                         not_empty = 1;
1001                 } else {
1002                         wep_cmd->key[i].key_offset = WEP_INVALID_OFFSET;
1003                 }
1004
1005                 wep_cmd->key[i].key_size = ctx->wep_keys[i].key_size;
1006                 memcpy(&wep_cmd->key[i].key[3], ctx->wep_keys[i].key,
1007                                 ctx->wep_keys[i].key_size);
1008         }
1009
1010         wep_cmd->global_key_type = WEP_KEY_WEP_TYPE;
1011         wep_cmd->num_keys = WEP_KEYS_MAX;
1012
1013         cmd_size += sizeof(struct iwl_wep_key) * WEP_KEYS_MAX;
1014
1015         cmd.len[0] = cmd_size;
1016
1017         if (not_empty || send_if_empty)
1018                 return iwl_trans_send_cmd(trans(priv), &cmd);
1019         else
1020                 return 0;
1021 }
1022
1023 int iwl_restore_default_wep_keys(struct iwl_priv *priv,
1024                                  struct iwl_rxon_context *ctx)
1025 {
1026         lockdep_assert_held(&priv->shrd->mutex);
1027
1028         return iwl_send_static_wepkey_cmd(priv, ctx, false);
1029 }
1030
1031 int iwl_remove_default_wep_key(struct iwl_priv *priv,
1032                                struct iwl_rxon_context *ctx,
1033                                struct ieee80211_key_conf *keyconf)
1034 {
1035         int ret;
1036
1037         lockdep_assert_held(&priv->shrd->mutex);
1038
1039         IWL_DEBUG_WEP(priv, "Removing default WEP key: idx=%d\n",
1040                       keyconf->keyidx);
1041
1042         memset(&ctx->wep_keys[keyconf->keyidx], 0, sizeof(ctx->wep_keys[0]));
1043         if (iwl_is_rfkill(priv->shrd)) {
1044                 IWL_DEBUG_WEP(priv,
1045                         "Not sending REPLY_WEPKEY command due to RFKILL.\n");
1046                 /* but keys in device are clear anyway so return success */
1047                 return 0;
1048         }
1049         ret = iwl_send_static_wepkey_cmd(priv, ctx, 1);
1050         IWL_DEBUG_WEP(priv, "Remove default WEP key: idx=%d ret=%d\n",
1051                       keyconf->keyidx, ret);
1052
1053         return ret;
1054 }
1055
1056 int iwl_set_default_wep_key(struct iwl_priv *priv,
1057                             struct iwl_rxon_context *ctx,
1058                             struct ieee80211_key_conf *keyconf)
1059 {
1060         int ret;
1061
1062         lockdep_assert_held(&priv->shrd->mutex);
1063
1064         if (keyconf->keylen != WEP_KEY_LEN_128 &&
1065             keyconf->keylen != WEP_KEY_LEN_64) {
1066                 IWL_DEBUG_WEP(priv,
1067                               "Bad WEP key length %d\n", keyconf->keylen);
1068                 return -EINVAL;
1069         }
1070
1071         keyconf->hw_key_idx = IWLAGN_HW_KEY_DEFAULT;
1072
1073         ctx->wep_keys[keyconf->keyidx].key_size = keyconf->keylen;
1074         memcpy(&ctx->wep_keys[keyconf->keyidx].key, &keyconf->key,
1075                                                         keyconf->keylen);
1076
1077         ret = iwl_send_static_wepkey_cmd(priv, ctx, false);
1078         IWL_DEBUG_WEP(priv, "Set default WEP key: len=%d idx=%d ret=%d\n",
1079                 keyconf->keylen, keyconf->keyidx, ret);
1080
1081         return ret;
1082 }
1083
1084 /*
1085  * dynamic (per-station) keys
1086  *
1087  * The dynamic keys are a little more complicated. The device has
1088  * a key cache of up to STA_KEY_MAX_NUM/STA_KEY_MAX_NUM_PAN keys.
1089  * These are linked to stations by a table that contains an index
1090  * into the key table for each station/key index/{mcast,unicast},
1091  * i.e. it's basically an array of pointers like this:
1092  *      key_offset_t key_mapping[NUM_STATIONS][4][2];
1093  * (it really works differently, but you can think of it as such)
1094  *
1095  * The key uploading and linking happens in the same command, the
1096  * add station command with STA_MODIFY_KEY_MASK.
1097  */
1098
1099 static u8 iwlagn_key_sta_id(struct iwl_priv *priv,
1100                             struct ieee80211_vif *vif,
1101                             struct ieee80211_sta *sta)
1102 {
1103         struct iwl_vif_priv *vif_priv = (void *)vif->drv_priv;
1104         u8 sta_id = IWL_INVALID_STATION;
1105
1106         if (sta)
1107                 sta_id = iwl_sta_id(sta);
1108
1109         /*
1110          * The device expects GTKs for station interfaces to be
1111          * installed as GTKs for the AP station. If we have no
1112          * station ID, then use the ap_sta_id in that case.
1113          */
1114         if (!sta && vif && vif_priv->ctx) {
1115                 switch (vif->type) {
1116                 case NL80211_IFTYPE_STATION:
1117                         sta_id = vif_priv->ctx->ap_sta_id;
1118                         break;
1119                 default:
1120                         /*
1121                          * In all other cases, the key will be
1122                          * used either for TX only or is bound
1123                          * to a station already.
1124                          */
1125                         break;
1126                 }
1127         }
1128
1129         return sta_id;
1130 }
1131
1132 static int iwlagn_send_sta_key(struct iwl_priv *priv,
1133                                struct ieee80211_key_conf *keyconf,
1134                                u8 sta_id, u32 tkip_iv32, u16 *tkip_p1k,
1135                                u32 cmd_flags)
1136 {
1137         unsigned long flags;
1138         __le16 key_flags;
1139         struct iwl_addsta_cmd sta_cmd;
1140         int i;
1141
1142         spin_lock_irqsave(&priv->shrd->sta_lock, flags);
1143         memcpy(&sta_cmd, &priv->stations[sta_id].sta, sizeof(sta_cmd));
1144         spin_unlock_irqrestore(&priv->shrd->sta_lock, flags);
1145
1146         key_flags = cpu_to_le16(keyconf->keyidx << STA_KEY_FLG_KEYID_POS);
1147         key_flags |= STA_KEY_FLG_MAP_KEY_MSK;
1148
1149         switch (keyconf->cipher) {
1150         case WLAN_CIPHER_SUITE_CCMP:
1151                 key_flags |= STA_KEY_FLG_CCMP;
1152                 memcpy(sta_cmd.key.key, keyconf->key, keyconf->keylen);
1153                 break;
1154         case WLAN_CIPHER_SUITE_TKIP:
1155                 key_flags |= STA_KEY_FLG_TKIP;
1156                 sta_cmd.key.tkip_rx_tsc_byte2 = tkip_iv32;
1157                 for (i = 0; i < 5; i++)
1158                         sta_cmd.key.tkip_rx_ttak[i] = cpu_to_le16(tkip_p1k[i]);
1159                 memcpy(sta_cmd.key.key, keyconf->key, keyconf->keylen);
1160                 break;
1161         case WLAN_CIPHER_SUITE_WEP104:
1162                 key_flags |= STA_KEY_FLG_KEY_SIZE_MSK;
1163                 /* fall through */
1164         case WLAN_CIPHER_SUITE_WEP40:
1165                 key_flags |= STA_KEY_FLG_WEP;
1166                 memcpy(&sta_cmd.key.key[3], keyconf->key, keyconf->keylen);
1167                 break;
1168         default:
1169                 WARN_ON(1);
1170                 return -EINVAL;
1171         }
1172
1173         if (!(keyconf->flags & IEEE80211_KEY_FLAG_PAIRWISE))
1174                 key_flags |= STA_KEY_MULTICAST_MSK;
1175
1176         /* key pointer (offset) */
1177         sta_cmd.key.key_offset = keyconf->hw_key_idx;
1178
1179         sta_cmd.key.key_flags = key_flags;
1180         sta_cmd.mode = STA_CONTROL_MODIFY_MSK;
1181         sta_cmd.sta.modify_mask = STA_MODIFY_KEY_MASK;
1182
1183         return iwl_send_add_sta(priv, &sta_cmd, cmd_flags);
1184 }
1185
1186 void iwl_update_tkip_key(struct iwl_priv *priv,
1187                          struct ieee80211_vif *vif,
1188                          struct ieee80211_key_conf *keyconf,
1189                          struct ieee80211_sta *sta, u32 iv32, u16 *phase1key)
1190 {
1191         u8 sta_id = iwlagn_key_sta_id(priv, vif, sta);
1192
1193         if (sta_id == IWL_INVALID_STATION)
1194                 return;
1195
1196         if (iwl_scan_cancel(priv)) {
1197                 /* cancel scan failed, just live w/ bad key and rely
1198                    briefly on SW decryption */
1199                 return;
1200         }
1201
1202         iwlagn_send_sta_key(priv, keyconf, sta_id,
1203                             iv32, phase1key, CMD_ASYNC);
1204 }
1205
1206 int iwl_remove_dynamic_key(struct iwl_priv *priv,
1207                            struct iwl_rxon_context *ctx,
1208                            struct ieee80211_key_conf *keyconf,
1209                            struct ieee80211_sta *sta)
1210 {
1211         unsigned long flags;
1212         struct iwl_addsta_cmd sta_cmd;
1213         u8 sta_id = iwlagn_key_sta_id(priv, ctx->vif, sta);
1214
1215         /* if station isn't there, neither is the key */
1216         if (sta_id == IWL_INVALID_STATION)
1217                 return -ENOENT;
1218
1219         spin_lock_irqsave(&priv->shrd->sta_lock, flags);
1220         memcpy(&sta_cmd, &priv->stations[sta_id].sta, sizeof(sta_cmd));
1221         if (!(priv->stations[sta_id].used & IWL_STA_UCODE_ACTIVE))
1222                 sta_id = IWL_INVALID_STATION;
1223         spin_unlock_irqrestore(&priv->shrd->sta_lock, flags);
1224
1225         if (sta_id == IWL_INVALID_STATION)
1226                 return 0;
1227
1228         lockdep_assert_held(&priv->shrd->mutex);
1229
1230         ctx->key_mapping_keys--;
1231
1232         IWL_DEBUG_WEP(priv, "Remove dynamic key: idx=%d sta=%d\n",
1233                       keyconf->keyidx, sta_id);
1234
1235         if (!test_and_clear_bit(keyconf->hw_key_idx, &priv->ucode_key_table))
1236                 IWL_ERR(priv, "offset %d not used in uCode key table.\n",
1237                         keyconf->hw_key_idx);
1238
1239         sta_cmd.key.key_flags = STA_KEY_FLG_NO_ENC | STA_KEY_FLG_INVALID;
1240         sta_cmd.key.key_offset = WEP_INVALID_OFFSET;
1241         sta_cmd.sta.modify_mask = STA_MODIFY_KEY_MASK;
1242         sta_cmd.mode = STA_CONTROL_MODIFY_MSK;
1243
1244         return iwl_send_add_sta(priv, &sta_cmd, CMD_SYNC);
1245 }
1246
1247 int iwl_set_dynamic_key(struct iwl_priv *priv,
1248                         struct iwl_rxon_context *ctx,
1249                         struct ieee80211_key_conf *keyconf,
1250                         struct ieee80211_sta *sta)
1251 {
1252         struct ieee80211_key_seq seq;
1253         u16 p1k[5];
1254         int ret;
1255         u8 sta_id = iwlagn_key_sta_id(priv, ctx->vif, sta);
1256         const u8 *addr;
1257
1258         if (sta_id == IWL_INVALID_STATION)
1259                 return -EINVAL;
1260
1261         lockdep_assert_held(&priv->shrd->mutex);
1262
1263         keyconf->hw_key_idx = iwl_get_free_ucode_key_offset(priv);
1264         if (keyconf->hw_key_idx == WEP_INVALID_OFFSET)
1265                 return -ENOSPC;
1266
1267         ctx->key_mapping_keys++;
1268
1269         switch (keyconf->cipher) {
1270         case WLAN_CIPHER_SUITE_TKIP:
1271                 keyconf->flags |= IEEE80211_KEY_FLAG_GENERATE_MMIC;
1272                 keyconf->flags |= IEEE80211_KEY_FLAG_GENERATE_IV;
1273
1274                 if (sta)
1275                         addr = sta->addr;
1276                 else /* station mode case only */
1277                         addr = ctx->active.bssid_addr;
1278
1279                 /* pre-fill phase 1 key into device cache */
1280                 ieee80211_get_key_rx_seq(keyconf, 0, &seq);
1281                 ieee80211_get_tkip_rx_p1k(keyconf, addr, seq.tkip.iv32, p1k);
1282                 ret = iwlagn_send_sta_key(priv, keyconf, sta_id,
1283                                           seq.tkip.iv32, p1k, CMD_SYNC);
1284                 break;
1285         case WLAN_CIPHER_SUITE_CCMP:
1286                 keyconf->flags |= IEEE80211_KEY_FLAG_GENERATE_IV;
1287                 /* fall through */
1288         case WLAN_CIPHER_SUITE_WEP40:
1289         case WLAN_CIPHER_SUITE_WEP104:
1290                 ret = iwlagn_send_sta_key(priv, keyconf, sta_id,
1291                                           0, NULL, CMD_SYNC);
1292                 break;
1293         default:
1294                 IWL_ERR(priv, "Unknown cipher %x\n", keyconf->cipher);
1295                 ret = -EINVAL;
1296         }
1297
1298         if (ret) {
1299                 ctx->key_mapping_keys--;
1300                 clear_bit(keyconf->hw_key_idx, &priv->ucode_key_table);
1301         }
1302
1303         IWL_DEBUG_WEP(priv, "Set dynamic key: cipher=%x len=%d idx=%d sta=%pM ret=%d\n",
1304                       keyconf->cipher, keyconf->keylen, keyconf->keyidx,
1305                       sta ? sta->addr : NULL, ret);
1306
1307         return ret;
1308 }
1309
1310 /**
1311  * iwlagn_alloc_bcast_station - add broadcast station into driver's station table.
1312  *
1313  * This adds the broadcast station into the driver's station table
1314  * and marks it driver active, so that it will be restored to the
1315  * device at the next best time.
1316  */
1317 int iwlagn_alloc_bcast_station(struct iwl_priv *priv,
1318                                struct iwl_rxon_context *ctx)
1319 {
1320         struct iwl_link_quality_cmd *link_cmd;
1321         unsigned long flags;
1322         u8 sta_id;
1323
1324         spin_lock_irqsave(&priv->shrd->sta_lock, flags);
1325         sta_id = iwl_prep_station(priv, ctx, iwl_bcast_addr, false, NULL);
1326         if (sta_id == IWL_INVALID_STATION) {
1327                 IWL_ERR(priv, "Unable to prepare broadcast station\n");
1328                 spin_unlock_irqrestore(&priv->shrd->sta_lock, flags);
1329
1330                 return -EINVAL;
1331         }
1332
1333         priv->stations[sta_id].used |= IWL_STA_DRIVER_ACTIVE;
1334         priv->stations[sta_id].used |= IWL_STA_BCAST;
1335         spin_unlock_irqrestore(&priv->shrd->sta_lock, flags);
1336
1337         link_cmd = iwl_sta_alloc_lq(priv, ctx, sta_id);
1338         if (!link_cmd) {
1339                 IWL_ERR(priv,
1340                         "Unable to initialize rate scaling for bcast station.\n");
1341                 return -ENOMEM;
1342         }
1343
1344         spin_lock_irqsave(&priv->shrd->sta_lock, flags);
1345         priv->stations[sta_id].lq = link_cmd;
1346         spin_unlock_irqrestore(&priv->shrd->sta_lock, flags);
1347
1348         return 0;
1349 }
1350
1351 /**
1352  * iwl_update_bcast_station - update broadcast station's LQ command
1353  *
1354  * Only used by iwlagn. Placed here to have all bcast station management
1355  * code together.
1356  */
1357 int iwl_update_bcast_station(struct iwl_priv *priv,
1358                              struct iwl_rxon_context *ctx)
1359 {
1360         unsigned long flags;
1361         struct iwl_link_quality_cmd *link_cmd;
1362         u8 sta_id = ctx->bcast_sta_id;
1363
1364         link_cmd = iwl_sta_alloc_lq(priv, ctx, sta_id);
1365         if (!link_cmd) {
1366                 IWL_ERR(priv, "Unable to initialize rate scaling for bcast station.\n");
1367                 return -ENOMEM;
1368         }
1369
1370         spin_lock_irqsave(&priv->shrd->sta_lock, flags);
1371         if (priv->stations[sta_id].lq)
1372                 kfree(priv->stations[sta_id].lq);
1373         else
1374                 IWL_DEBUG_INFO(priv, "Bcast station rate scaling has not been initialized yet.\n");
1375         priv->stations[sta_id].lq = link_cmd;
1376         spin_unlock_irqrestore(&priv->shrd->sta_lock, flags);
1377
1378         return 0;
1379 }
1380
1381 int iwl_update_bcast_stations(struct iwl_priv *priv)
1382 {
1383         struct iwl_rxon_context *ctx;
1384         int ret = 0;
1385
1386         for_each_context(priv, ctx) {
1387                 ret = iwl_update_bcast_station(priv, ctx);
1388                 if (ret)
1389                         break;
1390         }
1391
1392         return ret;
1393 }
1394
1395 /**
1396  * iwl_sta_tx_modify_enable_tid - Enable Tx for this TID in station table
1397  */
1398 int iwl_sta_tx_modify_enable_tid(struct iwl_priv *priv, int sta_id, int tid)
1399 {
1400         unsigned long flags;
1401         struct iwl_addsta_cmd sta_cmd;
1402
1403         lockdep_assert_held(&priv->shrd->mutex);
1404
1405         /* Remove "disable" flag, to enable Tx for this TID */
1406         spin_lock_irqsave(&priv->shrd->sta_lock, flags);
1407         priv->stations[sta_id].sta.sta.modify_mask = STA_MODIFY_TID_DISABLE_TX;
1408         priv->stations[sta_id].sta.tid_disable_tx &= cpu_to_le16(~(1 << tid));
1409         priv->stations[sta_id].sta.mode = STA_CONTROL_MODIFY_MSK;
1410         memcpy(&sta_cmd, &priv->stations[sta_id].sta, sizeof(struct iwl_addsta_cmd));
1411         spin_unlock_irqrestore(&priv->shrd->sta_lock, flags);
1412
1413         return iwl_send_add_sta(priv, &sta_cmd, CMD_SYNC);
1414 }
1415
1416 int iwl_sta_rx_agg_start(struct iwl_priv *priv, struct ieee80211_sta *sta,
1417                          int tid, u16 ssn)
1418 {
1419         unsigned long flags;
1420         int sta_id;
1421         struct iwl_addsta_cmd sta_cmd;
1422
1423         lockdep_assert_held(&priv->shrd->mutex);
1424
1425         sta_id = iwl_sta_id(sta);
1426         if (sta_id == IWL_INVALID_STATION)
1427                 return -ENXIO;
1428
1429         spin_lock_irqsave(&priv->shrd->sta_lock, flags);
1430         priv->stations[sta_id].sta.station_flags_msk = 0;
1431         priv->stations[sta_id].sta.sta.modify_mask = STA_MODIFY_ADDBA_TID_MSK;
1432         priv->stations[sta_id].sta.add_immediate_ba_tid = (u8)tid;
1433         priv->stations[sta_id].sta.add_immediate_ba_ssn = cpu_to_le16(ssn);
1434         priv->stations[sta_id].sta.mode = STA_CONTROL_MODIFY_MSK;
1435         memcpy(&sta_cmd, &priv->stations[sta_id].sta, sizeof(struct iwl_addsta_cmd));
1436         spin_unlock_irqrestore(&priv->shrd->sta_lock, flags);
1437
1438         return iwl_send_add_sta(priv, &sta_cmd, CMD_SYNC);
1439 }
1440
1441 int iwl_sta_rx_agg_stop(struct iwl_priv *priv, struct ieee80211_sta *sta,
1442                         int tid)
1443 {
1444         unsigned long flags;
1445         int sta_id;
1446         struct iwl_addsta_cmd sta_cmd;
1447
1448         lockdep_assert_held(&priv->shrd->mutex);
1449
1450         sta_id = iwl_sta_id(sta);
1451         if (sta_id == IWL_INVALID_STATION) {
1452                 IWL_ERR(priv, "Invalid station for AGG tid %d\n", tid);
1453                 return -ENXIO;
1454         }
1455
1456         spin_lock_irqsave(&priv->shrd->sta_lock, flags);
1457         priv->stations[sta_id].sta.station_flags_msk = 0;
1458         priv->stations[sta_id].sta.sta.modify_mask = STA_MODIFY_DELBA_TID_MSK;
1459         priv->stations[sta_id].sta.remove_immediate_ba_tid = (u8)tid;
1460         priv->stations[sta_id].sta.mode = STA_CONTROL_MODIFY_MSK;
1461         memcpy(&sta_cmd, &priv->stations[sta_id].sta, sizeof(struct iwl_addsta_cmd));
1462         spin_unlock_irqrestore(&priv->shrd->sta_lock, flags);
1463
1464         return iwl_send_add_sta(priv, &sta_cmd, CMD_SYNC);
1465 }
1466
1467 static void iwl_sta_modify_ps_wake(struct iwl_priv *priv, int sta_id)
1468 {
1469         unsigned long flags;
1470
1471         spin_lock_irqsave(&priv->shrd->sta_lock, flags);
1472         priv->stations[sta_id].sta.station_flags &= ~STA_FLG_PWR_SAVE_MSK;
1473         priv->stations[sta_id].sta.station_flags_msk = STA_FLG_PWR_SAVE_MSK;
1474         priv->stations[sta_id].sta.sta.modify_mask = 0;
1475         priv->stations[sta_id].sta.sleep_tx_count = 0;
1476         priv->stations[sta_id].sta.mode = STA_CONTROL_MODIFY_MSK;
1477         iwl_send_add_sta(priv, &priv->stations[sta_id].sta, CMD_ASYNC);
1478         spin_unlock_irqrestore(&priv->shrd->sta_lock, flags);
1479
1480 }
1481
1482 void iwl_sta_modify_sleep_tx_count(struct iwl_priv *priv, int sta_id, int cnt)
1483 {
1484         unsigned long flags;
1485
1486         spin_lock_irqsave(&priv->shrd->sta_lock, flags);
1487         priv->stations[sta_id].sta.station_flags |= STA_FLG_PWR_SAVE_MSK;
1488         priv->stations[sta_id].sta.station_flags_msk = STA_FLG_PWR_SAVE_MSK;
1489         priv->stations[sta_id].sta.sta.modify_mask =
1490                                         STA_MODIFY_SLEEP_TX_COUNT_MSK;
1491         priv->stations[sta_id].sta.sleep_tx_count = cpu_to_le16(cnt);
1492         priv->stations[sta_id].sta.mode = STA_CONTROL_MODIFY_MSK;
1493         iwl_send_add_sta(priv, &priv->stations[sta_id].sta, CMD_ASYNC);
1494         spin_unlock_irqrestore(&priv->shrd->sta_lock, flags);
1495
1496 }
1497
1498 void iwlagn_mac_sta_notify(struct ieee80211_hw *hw,
1499                            struct ieee80211_vif *vif,
1500                            enum sta_notify_cmd cmd,
1501                            struct ieee80211_sta *sta)
1502 {
1503         struct iwl_priv *priv = hw->priv;
1504         struct iwl_station_priv *sta_priv = (void *)sta->drv_priv;
1505         int sta_id;
1506
1507         IWL_DEBUG_MAC80211(priv, "enter\n");
1508
1509         switch (cmd) {
1510         case STA_NOTIFY_SLEEP:
1511                 WARN_ON(!sta_priv->client);
1512                 sta_priv->asleep = true;
1513                 if (atomic_read(&sta_priv->pending_frames) > 0)
1514                         ieee80211_sta_block_awake(hw, sta, true);
1515                 break;
1516         case STA_NOTIFY_AWAKE:
1517                 WARN_ON(!sta_priv->client);
1518                 if (!sta_priv->asleep)
1519                         break;
1520                 sta_priv->asleep = false;
1521                 sta_id = iwl_sta_id(sta);
1522                 if (sta_id != IWL_INVALID_STATION)
1523                         iwl_sta_modify_ps_wake(priv, sta_id);
1524                 break;
1525         default:
1526                 break;
1527         }
1528         IWL_DEBUG_MAC80211(priv, "leave\n");
1529 }