drivers/net/wireless/intel/iwlwifi/dvm/sta.c

   1 /******************************************************************************
   2  *
   3  * Copyright(c) 2003 - 2014 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 <linuxwifi@intel.com>
  26  * Intel Corporation, 5200 N.E. Elam Young Parkway, Hillsboro, OR 97124-6497
  27  *
  28  *****************************************************************************/
  29 #include <linux/etherdevice.h>
  30 #include <net/mac80211.h>
  31 #include "iwl-trans.h"
  32 #include "dev.h"
  33 #include "agn.h"
  34
  35 const u8 iwl_bcast_addr[ETH_ALEN] = { 0xFF, 0xFF, 0xFF, 0xFF, 0xFF, 0xFF };
  36
  37 static int iwl_sta_ucode_activate(struct iwl_priv *priv, u8 sta_id)
  38 {
  39         lockdep_assert_held(&priv->sta_lock);
  40
  41         if (sta_id >= IWLAGN_STATION_COUNT) {
  42                 IWL_ERR(priv, "invalid sta_id %u\n", sta_id);
  43                 return -EINVAL;
  44         }
  45         if (!(priv->stations[sta_id].used & IWL_STA_DRIVER_ACTIVE))
  46                 IWL_ERR(priv, "ACTIVATE a non DRIVER active station id %u "
  47                         "addr %pM\n",
  48                         sta_id, priv->stations[sta_id].sta.sta.addr);
  49
  50         if (priv->stations[sta_id].used & IWL_STA_UCODE_ACTIVE) {
  51                 IWL_DEBUG_ASSOC(priv,
  52                                 "STA id %u addr %pM already present in uCode "
  53                                 "(according to driver)\n",
  54                                 sta_id, priv->stations[sta_id].sta.sta.addr);
  55         } else {
  56                 priv->stations[sta_id].used |= IWL_STA_UCODE_ACTIVE;
  57                 IWL_DEBUG_ASSOC(priv, "Added STA id %u addr %pM to uCode\n",
  58                                 sta_id, priv->stations[sta_id].sta.sta.addr);
  59         }
  60         return 0;
  61 }
  62
  63 static void iwl_process_add_sta_resp(struct iwl_priv *priv,
  64                                      struct iwl_rx_packet *pkt)
  65 {
  66         struct iwl_add_sta_resp *add_sta_resp = (void *)pkt->data;
  67
  68         IWL_DEBUG_INFO(priv, "Processing response for adding station\n");
  69
  70         spin_lock_bh(&priv->sta_lock);
  71
  72         switch (add_sta_resp->status) {
  73         case ADD_STA_SUCCESS_MSK:
  74                 IWL_DEBUG_INFO(priv, "REPLY_ADD_STA PASSED\n");
  75                 break;
  76         case ADD_STA_NO_ROOM_IN_TABLE:
  77                 IWL_ERR(priv, "Adding station failed, no room in table.\n");
  78                 break;
  79         case ADD_STA_NO_BLOCK_ACK_RESOURCE:
  80                 IWL_ERR(priv,
  81                         "Adding station failed, no block ack resource.\n");
  82                 break;
  83         case ADD_STA_MODIFY_NON_EXIST_STA:
  84                 IWL_ERR(priv, "Attempting to modify non-existing station\n");
  85                 break;
  86         default:
  87                 IWL_DEBUG_ASSOC(priv, "Received REPLY_ADD_STA:(0x%08X)\n",
  88                                 add_sta_resp->status);
  89                 break;
  90         }
  91
  92         spin_unlock_bh(&priv->sta_lock);
  93 }
  94
  95 void iwl_add_sta_callback(struct iwl_priv *priv, struct iwl_rx_cmd_buffer *rxb)
  96 {
  97         struct iwl_rx_packet *pkt = rxb_addr(rxb);
  98
  99         iwl_process_add_sta_resp(priv, pkt);
 100 }
 101
 102 int iwl_send_add_sta(struct iwl_priv *priv,
 103                      struct iwl_addsta_cmd *sta, u8 flags)
 104 {
 105         int ret = 0;
 106         struct iwl_host_cmd cmd = {
 107                 .id = REPLY_ADD_STA,
 108                 .flags = flags,
 109                 .data = { sta, },
 110                 .len = { sizeof(*sta), },
 111         };
 112         u8 sta_id __maybe_unused = sta->sta.sta_id;
 113         struct iwl_rx_packet *pkt;
 114         struct iwl_add_sta_resp *add_sta_resp;
 115
 116         IWL_DEBUG_INFO(priv, "Adding sta %u (%pM) %ssynchronously\n",
 117                        sta_id, sta->sta.addr, flags & CMD_ASYNC ?  "a" : "");
 118
 119         if (!(flags & CMD_ASYNC)) {
 120                 cmd.flags |= CMD_WANT_SKB;
 121                 might_sleep();
 122         }
 123
 124         ret = iwl_dvm_send_cmd(priv, &cmd);
 125
 126         if (ret || (flags & CMD_ASYNC))
 127                 return ret;
 128
 129         pkt = cmd.resp_pkt;
 130         add_sta_resp = (void *)pkt->data;
 131
 132         /* debug messages are printed in the handler */
 133         if (add_sta_resp->status == ADD_STA_SUCCESS_MSK) {
 134                 spin_lock_bh(&priv->sta_lock);
 135                 ret = iwl_sta_ucode_activate(priv, sta_id);
 136                 spin_unlock_bh(&priv->sta_lock);
 137         } else {
 138                 ret = -EIO;
 139         }
 140
 141         iwl_free_resp(&cmd);
 142
 143         return ret;
 144 }
 145
 146 bool iwl_is_ht40_tx_allowed(struct iwl_priv *priv,
 147                             struct iwl_rxon_context *ctx,
 148                             struct ieee80211_sta *sta)
 149 {
 150         if (!ctx->ht.enabled || !ctx->ht.is_40mhz)
 151                 return false;
 152
 153 #ifdef CONFIG_IWLWIFI_DEBUGFS
 154         if (priv->disable_ht40)
 155                 return false;
 156 #endif
 157
 158         /* special case for RXON */
 159         if (!sta)
 160                 return true;
 161
 162         return sta->bandwidth >= IEEE80211_STA_RX_BW_40;
 163 }
 164
 165 static void iwl_sta_calc_ht_flags(struct iwl_priv *priv,
 166                                   struct ieee80211_sta *sta,
 167                                   struct iwl_rxon_context *ctx,
 168                                   __le32 *flags, __le32 *mask)
 169 {
 170         struct ieee80211_sta_ht_cap *sta_ht_inf = &sta->ht_cap;
 171
 172         *mask = STA_FLG_RTS_MIMO_PROT_MSK |
 173                 STA_FLG_MIMO_DIS_MSK |
 174                 STA_FLG_HT40_EN_MSK |
 175                 STA_FLG_MAX_AGG_SIZE_MSK |
 176                 STA_FLG_AGG_MPDU_DENSITY_MSK;
 177         *flags = 0;
 178
 179         if (!sta || !sta_ht_inf->ht_supported)
 180                 return;
 181
 182         IWL_DEBUG_INFO(priv, "STA %pM SM PS mode: %s\n",
 183                         sta->addr,
 184                         (sta->smps_mode == IEEE80211_SMPS_STATIC) ?
 185                         "static" :
 186                         (sta->smps_mode == IEEE80211_SMPS_DYNAMIC) ?
 187                         "dynamic" : "disabled");
 188
 189         switch (sta->smps_mode) {
 190         case IEEE80211_SMPS_STATIC:
 191                 *flags |= STA_FLG_MIMO_DIS_MSK;
 192                 break;
 193         case IEEE80211_SMPS_DYNAMIC:
 194                 *flags |= STA_FLG_RTS_MIMO_PROT_MSK;
 195                 break;
 196         case IEEE80211_SMPS_OFF:
 197                 break;
 198         default:
 199                 IWL_WARN(priv, "Invalid MIMO PS mode %d\n", sta->smps_mode);
 200                 break;
 201         }
 202
 203         *flags |= cpu_to_le32(
 204                 (u32)sta_ht_inf->ampdu_factor << STA_FLG_MAX_AGG_SIZE_POS);
 205
 206         *flags |= cpu_to_le32(
 207                 (u32)sta_ht_inf->ampdu_density << STA_FLG_AGG_MPDU_DENSITY_POS);
 208
 209         if (iwl_is_ht40_tx_allowed(priv, ctx, sta))
 210                 *flags |= STA_FLG_HT40_EN_MSK;
 211 }
 212
 213 int iwl_sta_update_ht(struct iwl_priv *priv, struct iwl_rxon_context *ctx,
 214                       struct ieee80211_sta *sta)
 215 {
 216         u8 sta_id = iwl_sta_id(sta);
 217         __le32 flags, mask;
 218         struct iwl_addsta_cmd cmd;
 219
 220         if (WARN_ON_ONCE(sta_id == IWL_INVALID_STATION))
 221                 return -EINVAL;
 222
 223         iwl_sta_calc_ht_flags(priv, sta, ctx, &flags, &mask);
 224
 225         spin_lock_bh(&priv->sta_lock);
 226         priv->stations[sta_id].sta.station_flags &= ~mask;
 227         priv->stations[sta_id].sta.station_flags |= flags;
 228         spin_unlock_bh(&priv->sta_lock);
 229
 230         memset(&cmd, 0, sizeof(cmd));
 231         cmd.mode = STA_CONTROL_MODIFY_MSK;
 232         cmd.station_flags_msk = mask;
 233         cmd.station_flags = flags;
 234         cmd.sta.sta_id = sta_id;
 235
 236         return iwl_send_add_sta(priv, &cmd, 0);
 237 }
 238
 239 static void iwl_set_ht_add_station(struct iwl_priv *priv, u8 index,
 240                                    struct ieee80211_sta *sta,
 241                                    struct iwl_rxon_context *ctx)
 242 {
 243         __le32 flags, mask;
 244
 245         iwl_sta_calc_ht_flags(priv, sta, ctx, &flags, &mask);
 246
 247         lockdep_assert_held(&priv->sta_lock);
 248         priv->stations[index].sta.station_flags &= ~mask;
 249         priv->stations[index].sta.station_flags |= flags;
 250 }
 251
 252 /**
 253  * iwl_prep_station - Prepare station information for addition
 254  *
 255  * should be called with sta_lock held
 256  */
 257 u8 iwl_prep_station(struct iwl_priv *priv, struct iwl_rxon_context *ctx,
 258                     const u8 *addr, bool is_ap, struct ieee80211_sta *sta)
 259 {
 260         struct iwl_station_entry *station;
 261         int i;
 262         u8 sta_id = IWL_INVALID_STATION;
 263
 264         if (is_ap)
 265                 sta_id = ctx->ap_sta_id;
 266         else if (is_broadcast_ether_addr(addr))
 267                 sta_id = ctx->bcast_sta_id;
 268         else
 269                 for (i = IWL_STA_ID; i < IWLAGN_STATION_COUNT; i++) {
 270                         if (ether_addr_equal(priv->stations[i].sta.sta.addr,
 271                                              addr)) {
 272                                 sta_id = i;
 273                                 break;
 274                         }
 275
 276                         if (!priv->stations[i].used &&
 277                             sta_id == IWL_INVALID_STATION)
 278                                 sta_id = i;
 279                 }
 280
 281         /*
 282          * These two conditions have the same outcome, but keep them
 283          * separate
 284          */
 285         if (unlikely(sta_id == IWL_INVALID_STATION))
 286                 return sta_id;
 287
 288         /*
 289          * uCode is not able to deal with multiple requests to add a
 290          * station. Keep track if one is in progress so that we do not send
 291          * another.
 292          */
 293         if (priv->stations[sta_id].used & IWL_STA_UCODE_INPROGRESS) {
 294                 IWL_DEBUG_INFO(priv, "STA %d already in process of being "
 295                                "added.\n", sta_id);
 296                 return sta_id;
 297         }
 298
 299         if ((priv->stations[sta_id].used & IWL_STA_DRIVER_ACTIVE) &&
 300             (priv->stations[sta_id].used & IWL_STA_UCODE_ACTIVE) &&
 301             ether_addr_equal(priv->stations[sta_id].sta.sta.addr, addr)) {
 302                 IWL_DEBUG_ASSOC(priv, "STA %d (%pM) already added, not "
 303                                 "adding again.\n", sta_id, addr);
 304                 return sta_id;
 305         }
 306
 307         station = &priv->stations[sta_id];
 308         station->used = IWL_STA_DRIVER_ACTIVE;
 309         IWL_DEBUG_ASSOC(priv, "Add STA to driver ID %d: %pM\n",
 310                         sta_id, addr);
 311         priv->num_stations++;
 312
 313         /* Set up the REPLY_ADD_STA command to send to device */
 314         memset(&station->sta, 0, sizeof(struct iwl_addsta_cmd));
 315         memcpy(station->sta.sta.addr, addr, ETH_ALEN);
 316         station->sta.mode = 0;
 317         station->sta.sta.sta_id = sta_id;
 318         station->sta.station_flags = ctx->station_flags;
 319         station->ctxid = ctx->ctxid;
 320
 321         if (sta) {
 322                 struct iwl_station_priv *sta_priv;
 323
 324                 sta_priv = (void *)sta->drv_priv;
 325                 sta_priv->ctx = ctx;
 326         }
 327
 328         /*
 329          * OK to call unconditionally, since local stations (IBSS BSSID
 330          * STA and broadcast STA) pass in a NULL sta, and mac80211
 331          * doesn't allow HT IBSS.
 332          */
 333         iwl_set_ht_add_station(priv, sta_id, sta, ctx);
 334
 335         return sta_id;
 336
 337 }
 338
 339 #define STA_WAIT_TIMEOUT (HZ/2)
 340
 341 /**
 342  * iwl_add_station_common -
 343  */
 344 int iwl_add_station_common(struct iwl_priv *priv, struct iwl_rxon_context *ctx,
 345                            const u8 *addr, bool is_ap,
 346                            struct ieee80211_sta *sta, u8 *sta_id_r)
 347 {
 348         int ret = 0;
 349         u8 sta_id;
 350         struct iwl_addsta_cmd sta_cmd;
 351
 352         *sta_id_r = 0;
 353         spin_lock_bh(&priv->sta_lock);
 354         sta_id = iwl_prep_station(priv, ctx, addr, is_ap, sta);
 355         if (sta_id == IWL_INVALID_STATION) {
 356                 IWL_ERR(priv, "Unable to prepare station %pM for addition\n",
 357                         addr);
 358                 spin_unlock_bh(&priv->sta_lock);
 359                 return -EINVAL;
 360         }
 361
 362         /*
 363          * uCode is not able to deal with multiple requests to add a
 364          * station. Keep track if one is in progress so that we do not send
 365          * another.
 366          */
 367         if (priv->stations[sta_id].used & IWL_STA_UCODE_INPROGRESS) {
 368                 IWL_DEBUG_INFO(priv, "STA %d already in process of being "
 369                                "added.\n", sta_id);
 370                 spin_unlock_bh(&priv->sta_lock);
 371                 return -EEXIST;
 372         }
 373
 374         if ((priv->stations[sta_id].used & IWL_STA_DRIVER_ACTIVE) &&
 375             (priv->stations[sta_id].used & IWL_STA_UCODE_ACTIVE)) {
 376                 IWL_DEBUG_ASSOC(priv, "STA %d (%pM) already added, not "
 377                                 "adding again.\n", sta_id, addr);
 378                 spin_unlock_bh(&priv->sta_lock);
 379                 return -EEXIST;
 380         }
 381
 382         priv->stations[sta_id].used |= IWL_STA_UCODE_INPROGRESS;
 383         memcpy(&sta_cmd, &priv->stations[sta_id].sta,
 384                sizeof(struct iwl_addsta_cmd));
 385         spin_unlock_bh(&priv->sta_lock);
 386
 387         /* Add station to device's station table */
 388         ret = iwl_send_add_sta(priv, &sta_cmd, 0);
 389         if (ret) {
 390                 spin_lock_bh(&priv->sta_lock);
 391                 IWL_ERR(priv, "Adding station %pM failed.\n",
 392                         priv->stations[sta_id].sta.sta.addr);
 393                 priv->stations[sta_id].used &= ~IWL_STA_DRIVER_ACTIVE;
 394                 priv->stations[sta_id].used &= ~IWL_STA_UCODE_INPROGRESS;
 395                 spin_unlock_bh(&priv->sta_lock);
 396         }
 397         *sta_id_r = sta_id;
 398         return ret;
 399 }
 400
 401 /**
 402  * iwl_sta_ucode_deactivate - deactivate ucode status for a station
 403  */
 404 static void iwl_sta_ucode_deactivate(struct iwl_priv *priv, u8 sta_id)
 405 {
 406         lockdep_assert_held(&priv->sta_lock);
 407
 408         /* Ucode must be active and driver must be non active */
 409         if ((priv->stations[sta_id].used &
 410              (IWL_STA_UCODE_ACTIVE | IWL_STA_DRIVER_ACTIVE)) !=
 411               IWL_STA_UCODE_ACTIVE)
 412                 IWL_ERR(priv, "removed non active STA %u\n", sta_id);
 413
 414         priv->stations[sta_id].used &= ~IWL_STA_UCODE_ACTIVE;
 415
 416         memset(&priv->stations[sta_id], 0, sizeof(struct iwl_station_entry));
 417         IWL_DEBUG_ASSOC(priv, "Removed STA %u\n", sta_id);
 418 }
 419
 420 static int iwl_send_remove_station(struct iwl_priv *priv,
 421                                    const u8 *addr, int sta_id,
 422                                    bool temporary)
 423 {
 424         struct iwl_rx_packet *pkt;
 425         int ret;
 426         struct iwl_rem_sta_cmd rm_sta_cmd;
 427         struct iwl_rem_sta_resp *rem_sta_resp;
 428
 429         struct iwl_host_cmd cmd = {
 430                 .id = REPLY_REMOVE_STA,
 431                 .len = { sizeof(struct iwl_rem_sta_cmd), },
 432                 .data = { &rm_sta_cmd, },
 433         };
 434
 435         memset(&rm_sta_cmd, 0, sizeof(rm_sta_cmd));
 436         rm_sta_cmd.num_sta = 1;
 437         memcpy(&rm_sta_cmd.addr, addr, ETH_ALEN);
 438
 439         cmd.flags |= CMD_WANT_SKB;
 440
 441         ret = iwl_dvm_send_cmd(priv, &cmd);
 442
 443         if (ret)
 444                 return ret;
 445
 446         pkt = cmd.resp_pkt;
 447         rem_sta_resp = (void *)pkt->data;
 448
 449         switch (rem_sta_resp->status) {
 450         case REM_STA_SUCCESS_MSK:
 451                 if (!temporary) {
 452                         spin_lock_bh(&priv->sta_lock);
 453                         iwl_sta_ucode_deactivate(priv, sta_id);
 454                         spin_unlock_bh(&priv->sta_lock);
 455                 }
 456                 IWL_DEBUG_ASSOC(priv, "REPLY_REMOVE_STA PASSED\n");
 457                 break;
 458         default:
 459                 ret = -EIO;
 460                 IWL_ERR(priv, "REPLY_REMOVE_STA failed\n");
 461                 break;
 462         }
 463
 464         iwl_free_resp(&cmd);
 465
 466         return ret;
 467 }
 468
 469 /**
 470  * iwl_remove_station - Remove driver's knowledge of station.
 471  */
 472 int iwl_remove_station(struct iwl_priv *priv, const u8 sta_id,
 473                        const u8 *addr)
 474 {
 475         u8 tid;
 476
 477         if (!iwl_is_ready(priv)) {
 478                 IWL_DEBUG_INFO(priv,
 479                         "Unable to remove station %pM, device not ready.\n",
 480                         addr);
 481                 /*
 482                  * It is typical for stations to be removed when we are
 483                  * going down. Return success since device will be down
 484                  * soon anyway
 485                  */
 486                 return 0;
 487         }
 488
 489         IWL_DEBUG_ASSOC(priv, "Removing STA from driver:%d  %pM\n",
 490                         sta_id, addr);
 491
 492         if (WARN_ON(sta_id == IWL_INVALID_STATION))
 493                 return -EINVAL;
 494
 495         spin_lock_bh(&priv->sta_lock);
 496
 497         if (!(priv->stations[sta_id].used & IWL_STA_DRIVER_ACTIVE)) {
 498                 IWL_DEBUG_INFO(priv, "Removing %pM but non DRIVER active\n",
 499                                 addr);
 500                 goto out_err;
 501         }
 502
 503         if (!(priv->stations[sta_id].used & IWL_STA_UCODE_ACTIVE)) {
 504                 IWL_DEBUG_INFO(priv, "Removing %pM but non UCODE active\n",
 505                                 addr);
 506                 goto out_err;
 507         }
 508
 509         if (priv->stations[sta_id].used & IWL_STA_LOCAL) {
 510                 kfree(priv->stations[sta_id].lq);
 511                 priv->stations[sta_id].lq = NULL;
 512         }
 513
 514         for (tid = 0; tid < IWL_MAX_TID_COUNT; tid++)
 515                 memset(&priv->tid_data[sta_id][tid], 0,
 516                         sizeof(priv->tid_data[sta_id][tid]));
 517
 518         priv->stations[sta_id].used &= ~IWL_STA_DRIVER_ACTIVE;
 519
 520         priv->num_stations--;
 521
 522         if (WARN_ON(priv->num_stations < 0))
 523                 priv->num_stations = 0;
 524
 525         spin_unlock_bh(&priv->sta_lock);
 526
 527         return iwl_send_remove_station(priv, addr, sta_id, false);
 528 out_err:
 529         spin_unlock_bh(&priv->sta_lock);
 530         return -EINVAL;
 531 }
 532
 533 void iwl_deactivate_station(struct iwl_priv *priv, const u8 sta_id,
 534                             const u8 *addr)
 535 {
 536         u8 tid;
 537
 538         if (!iwl_is_ready(priv)) {
 539                 IWL_DEBUG_INFO(priv,
 540                         "Unable to remove station %pM, device not ready.\n",
 541                         addr);
 542                 return;
 543         }
 544
 545         IWL_DEBUG_ASSOC(priv, "Deactivating STA: %pM (%d)\n", addr, sta_id);
 546
 547         if (WARN_ON_ONCE(sta_id == IWL_INVALID_STATION))
 548                 return;
 549
 550         spin_lock_bh(&priv->sta_lock);
 551
 552         WARN_ON_ONCE(!(priv->stations[sta_id].used & IWL_STA_DRIVER_ACTIVE));
 553
 554         for (tid = 0; tid < IWL_MAX_TID_COUNT; tid++)
 555                 memset(&priv->tid_data[sta_id][tid], 0,
 556                         sizeof(priv->tid_data[sta_id][tid]));
 557
 558         priv->stations[sta_id].used &= ~IWL_STA_DRIVER_ACTIVE;
 559         priv->stations[sta_id].used &= ~IWL_STA_UCODE_INPROGRESS;
 560
 561         priv->num_stations--;
 562
 563         if (WARN_ON_ONCE(priv->num_stations < 0))
 564                 priv->num_stations = 0;
 565
 566         spin_unlock_bh(&priv->sta_lock);
 567 }
 568
 569 static void iwl_sta_fill_lq(struct iwl_priv *priv, struct iwl_rxon_context *ctx,
 570                             u8 sta_id, struct iwl_link_quality_cmd *link_cmd)
 571 {
 572         int i, r;
 573         u32 rate_flags = 0;
 574         __le32 rate_n_flags;
 575
 576         lockdep_assert_held(&priv->mutex);
 577
 578         memset(link_cmd, 0, sizeof(*link_cmd));
 579
 580         /* Set up the rate scaling to start at selected rate, fall back
 581          * all the way down to 1M in IEEE order, and then spin on 1M */
 582         if (priv->band == NL80211_BAND_5GHZ)
 583                 r = IWL_RATE_6M_INDEX;
 584         else if (ctx && ctx->vif && ctx->vif->p2p)
 585                 r = IWL_RATE_6M_INDEX;
 586         else
 587                 r = IWL_RATE_1M_INDEX;
 588
 589         if (r >= IWL_FIRST_CCK_RATE && r <= IWL_LAST_CCK_RATE)
 590                 rate_flags |= RATE_MCS_CCK_MSK;
 591
 592         rate_flags |= first_antenna(priv->nvm_data->valid_tx_ant) <<
 593                                 RATE_MCS_ANT_POS;
 594         rate_n_flags = iwl_hw_set_rate_n_flags(iwl_rates[r].plcp, rate_flags);
 595         for (i = 0; i < LINK_QUAL_MAX_RETRY_NUM; i++)
 596                 link_cmd->rs_table[i].rate_n_flags = rate_n_flags;
 597
 598         link_cmd->general_params.single_stream_ant_msk =
 599                         first_antenna(priv->nvm_data->valid_tx_ant);
 600
 601         link_cmd->general_params.dual_stream_ant_msk =
 602                 priv->nvm_data->valid_tx_ant &
 603                 ~first_antenna(priv->nvm_data->valid_tx_ant);
 604         if (!link_cmd->general_params.dual_stream_ant_msk) {
 605                 link_cmd->general_params.dual_stream_ant_msk = ANT_AB;
 606         } else if (num_of_ant(priv->nvm_data->valid_tx_ant) == 2) {
 607                 link_cmd->general_params.dual_stream_ant_msk =
 608                         priv->nvm_data->valid_tx_ant;
 609         }
 610
 611         link_cmd->agg_params.agg_dis_start_th =
 612                 LINK_QUAL_AGG_DISABLE_START_DEF;
 613         link_cmd->agg_params.agg_time_limit =
 614                 cpu_to_le16(LINK_QUAL_AGG_TIME_LIMIT_DEF);
 615
 616         link_cmd->sta_id = sta_id;
 617 }
 618
 619 /**
 620  * iwl_clear_ucode_stations - clear ucode station table bits
 621  *
 622  * This function clears all the bits in the driver indicating
 623  * which stations are active in the ucode. Call when something
 624  * other than explicit station management would cause this in
 625  * the ucode, e.g. unassociated RXON.
 626  */
 627 void iwl_clear_ucode_stations(struct iwl_priv *priv,
 628                               struct iwl_rxon_context *ctx)
 629 {
 630         int i;
 631         bool cleared = false;
 632
 633         IWL_DEBUG_INFO(priv, "Clearing ucode stations in driver\n");
 634
 635         spin_lock_bh(&priv->sta_lock);
 636         for (i = 0; i < IWLAGN_STATION_COUNT; i++) {
 637                 if (ctx && ctx->ctxid != priv->stations[i].ctxid)
 638                         continue;
 639
 640                 if (priv->stations[i].used & IWL_STA_UCODE_ACTIVE) {
 641                         IWL_DEBUG_INFO(priv,
 642                                 "Clearing ucode active for station %d\n", i);
 643                         priv->stations[i].used &= ~IWL_STA_UCODE_ACTIVE;
 644                         cleared = true;
 645                 }
 646         }
 647         spin_unlock_bh(&priv->sta_lock);
 648
 649         if (!cleared)
 650                 IWL_DEBUG_INFO(priv,
 651                                "No active stations found to be cleared\n");
 652 }
 653
 654 /**
 655  * iwl_restore_stations() - Restore driver known stations to device
 656  *
 657  * All stations considered active by driver, but not present in ucode, is
 658  * restored.
 659  *
 660  * Function sleeps.
 661  */
 662 void iwl_restore_stations(struct iwl_priv *priv, struct iwl_rxon_context *ctx)
 663 {
 664         struct iwl_addsta_cmd sta_cmd;
 665         static const struct iwl_link_quality_cmd zero_lq = {};
 666         struct iwl_link_quality_cmd lq;
 667         int i;
 668         bool found = false;
 669         int ret;
 670         bool send_lq;
 671
 672         if (!iwl_is_ready(priv)) {
 673                 IWL_DEBUG_INFO(priv,
 674                                "Not ready yet, not restoring any stations.\n");
 675                 return;
 676         }
 677
 678         IWL_DEBUG_ASSOC(priv, "Restoring all known stations ... start.\n");
 679         spin_lock_bh(&priv->sta_lock);
 680         for (i = 0; i < IWLAGN_STATION_COUNT; i++) {
 681                 if (ctx->ctxid != priv->stations[i].ctxid)
 682                         continue;
 683                 if ((priv->stations[i].used & IWL_STA_DRIVER_ACTIVE) &&
 684                             !(priv->stations[i].used & IWL_STA_UCODE_ACTIVE)) {
 685                         IWL_DEBUG_ASSOC(priv, "Restoring sta %pM\n",
 686                                         priv->stations[i].sta.sta.addr);
 687                         priv->stations[i].sta.mode = 0;
 688                         priv->stations[i].used |= IWL_STA_UCODE_INPROGRESS;
 689                         found = true;
 690                 }
 691         }
 692
 693         for (i = 0; i < IWLAGN_STATION_COUNT; i++) {
 694                 if ((priv->stations[i].used & IWL_STA_UCODE_INPROGRESS)) {
 695                         memcpy(&sta_cmd, &priv->stations[i].sta,
 696                                sizeof(struct iwl_addsta_cmd));
 697                         send_lq = false;
 698                         if (priv->stations[i].lq) {
 699                                 if (priv->wowlan)
 700                                         iwl_sta_fill_lq(priv, ctx, i, &lq);
 701                                 else
 702                                         memcpy(&lq, priv->stations[i].lq,
 703                                                sizeof(struct iwl_link_quality_cmd));
 704
 705                                 if (memcmp(&lq, &zero_lq, sizeof(lq)))
 706                                         send_lq = true;
 707                         }
 708                         spin_unlock_bh(&priv->sta_lock);
 709                         ret = iwl_send_add_sta(priv, &sta_cmd, 0);
 710                         if (ret) {
 711                                 spin_lock_bh(&priv->sta_lock);
 712                                 IWL_ERR(priv, "Adding station %pM failed.\n",
 713                                         priv->stations[i].sta.sta.addr);
 714                                 priv->stations[i].used &=
 715                                                 ~IWL_STA_DRIVER_ACTIVE;
 716                                 priv->stations[i].used &=
 717                                                 ~IWL_STA_UCODE_INPROGRESS;
 718                                 continue;
 719                         }
 720                         /*
 721                          * Rate scaling has already been initialized, send
 722                          * current LQ command
 723                          */
 724                         if (send_lq)
 725                                 iwl_send_lq_cmd(priv, ctx, &lq, 0, true);
 726                         spin_lock_bh(&priv->sta_lock);
 727                         priv->stations[i].used &= ~IWL_STA_UCODE_INPROGRESS;
 728                 }
 729         }
 730
 731         spin_unlock_bh(&priv->sta_lock);
 732         if (!found)
 733                 IWL_DEBUG_INFO(priv, "Restoring all known stations .... "
 734                         "no stations to be restored.\n");
 735         else
 736                 IWL_DEBUG_INFO(priv, "Restoring all known stations .... "
 737                         "complete.\n");
 738 }
 739
 740 int iwl_get_free_ucode_key_offset(struct iwl_priv *priv)
 741 {
 742         int i;
 743
 744         for (i = 0; i < priv->sta_key_max_num; i++)
 745                 if (!test_and_set_bit(i, &priv->ucode_key_table))
 746                         return i;
 747
 748         return WEP_INVALID_OFFSET;
 749 }
 750
 751 void iwl_dealloc_bcast_stations(struct iwl_priv *priv)
 752 {
 753         int i;
 754
 755         spin_lock_bh(&priv->sta_lock);
 756         for (i = 0; i < IWLAGN_STATION_COUNT; i++) {
 757                 if (!(priv->stations[i].used & IWL_STA_BCAST))
 758                         continue;
 759
 760                 priv->stations[i].used &= ~IWL_STA_UCODE_ACTIVE;
 761                 priv->num_stations--;
 762                 if (WARN_ON(priv->num_stations < 0))
 763                         priv->num_stations = 0;
 764                 kfree(priv->stations[i].lq);
 765                 priv->stations[i].lq = NULL;
 766         }
 767         spin_unlock_bh(&priv->sta_lock);
 768 }
 769
 770 #ifdef CONFIG_IWLWIFI_DEBUG
 771 static void iwl_dump_lq_cmd(struct iwl_priv *priv,
 772                            struct iwl_link_quality_cmd *lq)
 773 {
 774         int i;
 775         IWL_DEBUG_RATE(priv, "lq station id 0x%x\n", lq->sta_id);
 776         IWL_DEBUG_RATE(priv, "lq ant 0x%X 0x%X\n",
 777                        lq->general_params.single_stream_ant_msk,
 778                        lq->general_params.dual_stream_ant_msk);
 779
 780         for (i = 0; i < LINK_QUAL_MAX_RETRY_NUM; i++)
 781                 IWL_DEBUG_RATE(priv, "lq index %d 0x%X\n",
 782                                i, lq->rs_table[i].rate_n_flags);
 783 }
 784 #else
 785 static inline void iwl_dump_lq_cmd(struct iwl_priv *priv,
 786                                    struct iwl_link_quality_cmd *lq)
 787 {
 788 }
 789 #endif
 790
 791 /**
 792  * is_lq_table_valid() - Test one aspect of LQ cmd for validity
 793  *
 794  * It sometimes happens when a HT rate has been in use and we
 795  * loose connectivity with AP then mac80211 will first tell us that the
 796  * current channel is not HT anymore before removing the station. In such a
 797  * scenario the RXON flags will be updated to indicate we are not
 798  * communicating HT anymore, but the LQ command may still contain HT rates.
 799  * Test for this to prevent driver from sending LQ command between the time
 800  * RXON flags are updated and when LQ command is updated.
 801  */
 802 static bool is_lq_table_valid(struct iwl_priv *priv,
 803                               struct iwl_rxon_context *ctx,
 804                               struct iwl_link_quality_cmd *lq)
 805 {
 806         int i;
 807
 808         if (ctx->ht.enabled)
 809                 return true;
 810
 811         IWL_DEBUG_INFO(priv, "Channel %u is not an HT channel\n",
 812                        ctx->active.channel);
 813         for (i = 0; i < LINK_QUAL_MAX_RETRY_NUM; i++) {
 814                 if (le32_to_cpu(lq->rs_table[i].rate_n_flags) &
 815                     RATE_MCS_HT_MSK) {
 816                         IWL_DEBUG_INFO(priv,
 817                                        "index %d of LQ expects HT channel\n",
 818                                        i);
 819                         return false;
 820                 }
 821         }
 822         return true;
 823 }
 824
 825 /**
 826  * iwl_send_lq_cmd() - Send link quality command
 827  * @init: This command is sent as part of station initialization right
 828  *        after station has been added.
 829  *
 830  * The link quality command is sent as the last step of station creation.
 831  * This is the special case in which init is set and we call a callback in
 832  * this case to clear the state indicating that station creation is in
 833  * progress.
 834  */
 835 int iwl_send_lq_cmd(struct iwl_priv *priv, struct iwl_rxon_context *ctx,
 836                     struct iwl_link_quality_cmd *lq, u8 flags, bool init)
 837 {
 838         int ret = 0;
 839         struct iwl_host_cmd cmd = {
 840                 .id = REPLY_TX_LINK_QUALITY_CMD,
 841                 .len = { sizeof(struct iwl_link_quality_cmd), },
 842                 .flags = flags,
 843                 .data = { lq, },
 844         };
 845
 846         if (WARN_ON(lq->sta_id == IWL_INVALID_STATION))
 847                 return -EINVAL;
 848
 849
 850         spin_lock_bh(&priv->sta_lock);
 851         if (!(priv->stations[lq->sta_id].used & IWL_STA_DRIVER_ACTIVE)) {
 852                 spin_unlock_bh(&priv->sta_lock);
 853                 return -EINVAL;
 854         }
 855         spin_unlock_bh(&priv->sta_lock);
 856
 857         iwl_dump_lq_cmd(priv, lq);
 858         if (WARN_ON(init && (cmd.flags & CMD_ASYNC)))
 859                 return -EINVAL;
 860
 861         if (is_lq_table_valid(priv, ctx, lq))
 862                 ret = iwl_dvm_send_cmd(priv, &cmd);
 863         else
 864                 ret = -EINVAL;
 865
 866         if (cmd.flags & CMD_ASYNC)
 867                 return ret;
 868
 869         if (init) {
 870                 IWL_DEBUG_INFO(priv, "init LQ command complete, "
 871                                "clearing sta addition status for sta %d\n",
 872                                lq->sta_id);
 873                 spin_lock_bh(&priv->sta_lock);
 874                 priv->stations[lq->sta_id].used &= ~IWL_STA_UCODE_INPROGRESS;
 875                 spin_unlock_bh(&priv->sta_lock);
 876         }
 877         return ret;
 878 }
 879
 880
 881 static struct iwl_link_quality_cmd *
 882 iwl_sta_alloc_lq(struct iwl_priv *priv, struct iwl_rxon_context *ctx,
 883                  u8 sta_id)
 884 {
 885         struct iwl_link_quality_cmd *link_cmd;
 886
 887         link_cmd = kzalloc(sizeof(struct iwl_link_quality_cmd), GFP_KERNEL);
 888         if (!link_cmd) {
 889                 IWL_ERR(priv, "Unable to allocate memory for LQ cmd.\n");
 890                 return NULL;
 891         }
 892
 893         iwl_sta_fill_lq(priv, ctx, sta_id, link_cmd);
 894
 895         return link_cmd;
 896 }
 897
 898 /*
 899  * iwlagn_add_bssid_station - Add the special IBSS BSSID station
 900  *
 901  * Function sleeps.
 902  */
 903 int iwlagn_add_bssid_station(struct iwl_priv *priv,
 904                              struct iwl_rxon_context *ctx,
 905                              const u8 *addr, u8 *sta_id_r)
 906 {
 907         int ret;
 908         u8 sta_id;
 909         struct iwl_link_quality_cmd *link_cmd;
 910
 911         if (sta_id_r)
 912                 *sta_id_r = IWL_INVALID_STATION;
 913
 914         ret = iwl_add_station_common(priv, ctx, addr, 0, NULL, &sta_id);
 915         if (ret) {
 916                 IWL_ERR(priv, "Unable to add station %pM\n", addr);
 917                 return ret;
 918         }
 919
 920         if (sta_id_r)
 921                 *sta_id_r = sta_id;
 922
 923         spin_lock_bh(&priv->sta_lock);
 924         priv->stations[sta_id].used |= IWL_STA_LOCAL;
 925         spin_unlock_bh(&priv->sta_lock);
 926
 927         /* Set up default rate scaling table in device's station table */
 928         link_cmd = iwl_sta_alloc_lq(priv, ctx, sta_id);
 929         if (!link_cmd) {
 930                 IWL_ERR(priv,
 931                         "Unable to initialize rate scaling for station %pM.\n",
 932                         addr);
 933                 return -ENOMEM;
 934         }
 935
 936         ret = iwl_send_lq_cmd(priv, ctx, link_cmd, 0, true);
 937         if (ret)
 938                 IWL_ERR(priv, "Link quality command failed (%d)\n", ret);
 939
 940         spin_lock_bh(&priv->sta_lock);
 941         priv->stations[sta_id].lq = link_cmd;
 942         spin_unlock_bh(&priv->sta_lock);
 943
 944         return 0;
 945 }
 946
 947 /*
 948  * static WEP keys
 949  *
 950  * For each context, the device has a table of 4 static WEP keys
 951  * (one for each key index) that is updated with the following
 952  * commands.
 953  */
 954
 955 static int iwl_send_static_wepkey_cmd(struct iwl_priv *priv,
 956                                       struct iwl_rxon_context *ctx,
 957                                       bool send_if_empty)
 958 {
 959         int i, not_empty = 0;
 960         u8 buff[sizeof(struct iwl_wep_cmd) +
 961                 sizeof(struct iwl_wep_key) * WEP_KEYS_MAX];
 962         struct iwl_wep_cmd *wep_cmd = (struct iwl_wep_cmd *)buff;
 963         size_t cmd_size  = sizeof(struct iwl_wep_cmd);
 964         struct iwl_host_cmd cmd = {
 965                 .id = ctx->wep_key_cmd,
 966                 .data = { wep_cmd, },
 967         };
 968
 969         might_sleep();
 970
 971         memset(wep_cmd, 0, cmd_size +
 972                         (sizeof(struct iwl_wep_key) * WEP_KEYS_MAX));
 973
 974         for (i = 0; i < WEP_KEYS_MAX ; i++) {
 975                 wep_cmd->key[i].key_index = i;
 976                 if (ctx->wep_keys[i].key_size) {
 977                         wep_cmd->key[i].key_offset = i;
 978                         not_empty = 1;
 979                 } else {
 980                         wep_cmd->key[i].key_offset = WEP_INVALID_OFFSET;
 981                 }
 982
 983                 wep_cmd->key[i].key_size = ctx->wep_keys[i].key_size;
 984                 memcpy(&wep_cmd->key[i].key[3], ctx->wep_keys[i].key,
 985                                 ctx->wep_keys[i].key_size);
 986         }
 987
 988         wep_cmd->global_key_type = WEP_KEY_WEP_TYPE;
 989         wep_cmd->num_keys = WEP_KEYS_MAX;
 990
 991         cmd_size += sizeof(struct iwl_wep_key) * WEP_KEYS_MAX;
 992
 993         cmd.len[0] = cmd_size;
 994
 995         if (not_empty || send_if_empty)
 996                 return iwl_dvm_send_cmd(priv, &cmd);
 997         else
 998                 return 0;
 999 }
1000
1001 int iwl_restore_default_wep_keys(struct iwl_priv *priv,
1002                                  struct iwl_rxon_context *ctx)
1003 {
1004         lockdep_assert_held(&priv->mutex);
1005
1006         return iwl_send_static_wepkey_cmd(priv, ctx, false);
1007 }
1008
1009 int iwl_remove_default_wep_key(struct iwl_priv *priv,
1010                                struct iwl_rxon_context *ctx,
1011                                struct ieee80211_key_conf *keyconf)
1012 {
1013         int ret;
1014
1015         lockdep_assert_held(&priv->mutex);
1016
1017         IWL_DEBUG_WEP(priv, "Removing default WEP key: idx=%d\n",
1018                       keyconf->keyidx);
1019
1020         memset(&ctx->wep_keys[keyconf->keyidx], 0, sizeof(ctx->wep_keys[0]));
1021         if (iwl_is_rfkill(priv)) {
1022                 IWL_DEBUG_WEP(priv,
1023                         "Not sending REPLY_WEPKEY command due to RFKILL.\n");
1024                 /* but keys in device are clear anyway so return success */
1025                 return 0;
1026         }
1027         ret = iwl_send_static_wepkey_cmd(priv, ctx, 1);
1028         IWL_DEBUG_WEP(priv, "Remove default WEP key: idx=%d ret=%d\n",
1029                       keyconf->keyidx, ret);
1030
1031         return ret;
1032 }
1033
1034 int iwl_set_default_wep_key(struct iwl_priv *priv,
1035                             struct iwl_rxon_context *ctx,
1036                             struct ieee80211_key_conf *keyconf)
1037 {
1038         int ret;
1039
1040         lockdep_assert_held(&priv->mutex);
1041
1042         if (keyconf->keylen != WEP_KEY_LEN_128 &&
1043             keyconf->keylen != WEP_KEY_LEN_64) {
1044                 IWL_DEBUG_WEP(priv,
1045                               "Bad WEP key length %d\n", keyconf->keylen);
1046                 return -EINVAL;
1047         }
1048
1049         keyconf->hw_key_idx = IWLAGN_HW_KEY_DEFAULT;
1050
1051         ctx->wep_keys[keyconf->keyidx].key_size = keyconf->keylen;
1052         memcpy(&ctx->wep_keys[keyconf->keyidx].key, &keyconf->key,
1053                                                         keyconf->keylen);
1054
1055         ret = iwl_send_static_wepkey_cmd(priv, ctx, false);
1056         IWL_DEBUG_WEP(priv, "Set default WEP key: len=%d idx=%d ret=%d\n",
1057                 keyconf->keylen, keyconf->keyidx, ret);
1058
1059         return ret;
1060 }
1061
1062 /*
1063  * dynamic (per-station) keys
1064  *
1065  * The dynamic keys are a little more complicated. The device has
1066  * a key cache of up to STA_KEY_MAX_NUM/STA_KEY_MAX_NUM_PAN keys.
1067  * These are linked to stations by a table that contains an index
1068  * into the key table for each station/key index/{mcast,unicast},
1069  * i.e. it's basically an array of pointers like this:
1070  *      key_offset_t key_mapping[NUM_STATIONS][4][2];
1071  * (it really works differently, but you can think of it as such)
1072  *
1073  * The key uploading and linking happens in the same command, the
1074  * add station command with STA_MODIFY_KEY_MASK.
1075  */
1076
1077 static u8 iwlagn_key_sta_id(struct iwl_priv *priv,
1078                             struct ieee80211_vif *vif,
1079                             struct ieee80211_sta *sta)
1080 {
1081         struct iwl_vif_priv *vif_priv = (void *)vif->drv_priv;
1082
1083         if (sta)
1084                 return iwl_sta_id(sta);
1085
1086         /*
1087          * The device expects GTKs for station interfaces to be
1088          * installed as GTKs for the AP station. If we have no
1089          * station ID, then use the ap_sta_id in that case.
1090          */
1091         if (vif->type == NL80211_IFTYPE_STATION && vif_priv->ctx)
1092                 return vif_priv->ctx->ap_sta_id;
1093
1094         return IWL_INVALID_STATION;
1095 }
1096
1097 static int iwlagn_send_sta_key(struct iwl_priv *priv,
1098                                struct ieee80211_key_conf *keyconf,
1099                                u8 sta_id, u32 tkip_iv32, u16 *tkip_p1k,
1100                                u32 cmd_flags)
1101 {
1102         __le16 key_flags;
1103         struct iwl_addsta_cmd sta_cmd;
1104         int i;
1105
1106         spin_lock_bh(&priv->sta_lock);
1107         memcpy(&sta_cmd, &priv->stations[sta_id].sta, sizeof(sta_cmd));
1108         spin_unlock_bh(&priv->sta_lock);
1109
1110         key_flags = cpu_to_le16(keyconf->keyidx << STA_KEY_FLG_KEYID_POS);
1111         key_flags |= STA_KEY_FLG_MAP_KEY_MSK;
1112
1113         switch (keyconf->cipher) {
1114         case WLAN_CIPHER_SUITE_CCMP:
1115                 key_flags |= STA_KEY_FLG_CCMP;
1116                 memcpy(sta_cmd.key.key, keyconf->key, keyconf->keylen);
1117                 break;
1118         case WLAN_CIPHER_SUITE_TKIP:
1119                 key_flags |= STA_KEY_FLG_TKIP;
1120                 sta_cmd.key.tkip_rx_tsc_byte2 = tkip_iv32;
1121                 for (i = 0; i < 5; i++)
1122                         sta_cmd.key.tkip_rx_ttak[i] = cpu_to_le16(tkip_p1k[i]);
1123                 memcpy(sta_cmd.key.key, keyconf->key, keyconf->keylen);
1124                 break;
1125         case WLAN_CIPHER_SUITE_WEP104:
1126                 key_flags |= STA_KEY_FLG_KEY_SIZE_MSK;
1127                 /* fall through */
1128         case WLAN_CIPHER_SUITE_WEP40:
1129                 key_flags |= STA_KEY_FLG_WEP;
1130                 memcpy(&sta_cmd.key.key[3], keyconf->key, keyconf->keylen);
1131                 break;
1132         default:
1133                 WARN_ON(1);
1134                 return -EINVAL;
1135         }
1136
1137         if (!(keyconf->flags & IEEE80211_KEY_FLAG_PAIRWISE))
1138                 key_flags |= STA_KEY_MULTICAST_MSK;
1139
1140         /* key pointer (offset) */
1141         sta_cmd.key.key_offset = keyconf->hw_key_idx;
1142
1143         sta_cmd.key.key_flags = key_flags;
1144         sta_cmd.mode = STA_CONTROL_MODIFY_MSK;
1145         sta_cmd.sta.modify_mask = STA_MODIFY_KEY_MASK;
1146
1147         return iwl_send_add_sta(priv, &sta_cmd, cmd_flags);
1148 }
1149
1150 void iwl_update_tkip_key(struct iwl_priv *priv,
1151                          struct ieee80211_vif *vif,
1152                          struct ieee80211_key_conf *keyconf,
1153                          struct ieee80211_sta *sta, u32 iv32, u16 *phase1key)
1154 {
1155         u8 sta_id = iwlagn_key_sta_id(priv, vif, sta);
1156
1157         if (sta_id == IWL_INVALID_STATION)
1158                 return;
1159
1160         if (iwl_scan_cancel(priv)) {
1161                 /* cancel scan failed, just live w/ bad key and rely
1162                    briefly on SW decryption */
1163                 return;
1164         }
1165
1166         iwlagn_send_sta_key(priv, keyconf, sta_id,
1167                             iv32, phase1key, CMD_ASYNC);
1168 }
1169
1170 int iwl_remove_dynamic_key(struct iwl_priv *priv,
1171                            struct iwl_rxon_context *ctx,
1172                            struct ieee80211_key_conf *keyconf,
1173                            struct ieee80211_sta *sta)
1174 {
1175         struct iwl_addsta_cmd sta_cmd;
1176         u8 sta_id = iwlagn_key_sta_id(priv, ctx->vif, sta);
1177         __le16 key_flags;
1178
1179         /* if station isn't there, neither is the key */
1180         if (sta_id == IWL_INVALID_STATION)
1181                 return -ENOENT;
1182
1183         spin_lock_bh(&priv->sta_lock);
1184         memcpy(&sta_cmd, &priv->stations[sta_id].sta, sizeof(sta_cmd));
1185         if (!(priv->stations[sta_id].used & IWL_STA_UCODE_ACTIVE))
1186                 sta_id = IWL_INVALID_STATION;
1187         spin_unlock_bh(&priv->sta_lock);
1188
1189         if (sta_id == IWL_INVALID_STATION)
1190                 return 0;
1191
1192         lockdep_assert_held(&priv->mutex);
1193
1194         ctx->key_mapping_keys--;
1195
1196         IWL_DEBUG_WEP(priv, "Remove dynamic key: idx=%d sta=%d\n",
1197                       keyconf->keyidx, sta_id);
1198
1199         if (!test_and_clear_bit(keyconf->hw_key_idx, &priv->ucode_key_table))
1200                 IWL_ERR(priv, "offset %d not used in uCode key table.\n",
1201                         keyconf->hw_key_idx);
1202
1203         key_flags = cpu_to_le16(keyconf->keyidx << STA_KEY_FLG_KEYID_POS);
1204         key_flags |= STA_KEY_FLG_MAP_KEY_MSK | STA_KEY_FLG_NO_ENC |
1205                      STA_KEY_FLG_INVALID;
1206
1207         if (!(keyconf->flags & IEEE80211_KEY_FLAG_PAIRWISE))
1208                 key_flags |= STA_KEY_MULTICAST_MSK;
1209
1210         sta_cmd.key.key_flags = key_flags;
1211         sta_cmd.key.key_offset = keyconf->hw_key_idx;
1212         sta_cmd.sta.modify_mask = STA_MODIFY_KEY_MASK;
1213         sta_cmd.mode = STA_CONTROL_MODIFY_MSK;
1214
1215         return iwl_send_add_sta(priv, &sta_cmd, 0);
1216 }
1217
1218 int iwl_set_dynamic_key(struct iwl_priv *priv,
1219                         struct iwl_rxon_context *ctx,
1220                         struct ieee80211_key_conf *keyconf,
1221                         struct ieee80211_sta *sta)
1222 {
1223         struct ieee80211_key_seq seq;
1224         u16 p1k[5];
1225         int ret;
1226         u8 sta_id = iwlagn_key_sta_id(priv, ctx->vif, sta);
1227         const u8 *addr;
1228
1229         if (sta_id == IWL_INVALID_STATION)
1230                 return -EINVAL;
1231
1232         lockdep_assert_held(&priv->mutex);
1233
1234         keyconf->hw_key_idx = iwl_get_free_ucode_key_offset(priv);
1235         if (keyconf->hw_key_idx == WEP_INVALID_OFFSET)
1236                 return -ENOSPC;
1237
1238         ctx->key_mapping_keys++;
1239
1240         switch (keyconf->cipher) {
1241         case WLAN_CIPHER_SUITE_TKIP:
1242                 if (sta)
1243                         addr = sta->addr;
1244                 else /* station mode case only */
1245                         addr = ctx->active.bssid_addr;
1246
1247                 /* pre-fill phase 1 key into device cache */
1248                 ieee80211_get_key_rx_seq(keyconf, 0, &seq);
1249                 ieee80211_get_tkip_rx_p1k(keyconf, addr, seq.tkip.iv32, p1k);
1250                 ret = iwlagn_send_sta_key(priv, keyconf, sta_id,
1251                                           seq.tkip.iv32, p1k, 0);
1252                 break;
1253         case WLAN_CIPHER_SUITE_CCMP:
1254         case WLAN_CIPHER_SUITE_WEP40:
1255         case WLAN_CIPHER_SUITE_WEP104:
1256                 ret = iwlagn_send_sta_key(priv, keyconf, sta_id,
1257                                           0, NULL, 0);
1258                 break;
1259         default:
1260                 IWL_ERR(priv, "Unknown cipher %x\n", keyconf->cipher);
1261                 ret = -EINVAL;
1262         }
1263
1264         if (ret) {
1265                 ctx->key_mapping_keys--;
1266                 clear_bit(keyconf->hw_key_idx, &priv->ucode_key_table);
1267         }
1268
1269         IWL_DEBUG_WEP(priv, "Set dynamic key: cipher=%x len=%d idx=%d sta=%pM ret=%d\n",
1270                       keyconf->cipher, keyconf->keylen, keyconf->keyidx,
1271                       sta ? sta->addr : NULL, ret);
1272
1273         return ret;
1274 }
1275
1276 /**
1277  * iwlagn_alloc_bcast_station - add broadcast station into driver's station table.
1278  *
1279  * This adds the broadcast station into the driver's station table
1280  * and marks it driver active, so that it will be restored to the
1281  * device at the next best time.
1282  */
1283 int iwlagn_alloc_bcast_station(struct iwl_priv *priv,
1284                                struct iwl_rxon_context *ctx)
1285 {
1286         struct iwl_link_quality_cmd *link_cmd;
1287         u8 sta_id;
1288
1289         spin_lock_bh(&priv->sta_lock);
1290         sta_id = iwl_prep_station(priv, ctx, iwl_bcast_addr, false, NULL);
1291         if (sta_id == IWL_INVALID_STATION) {
1292                 IWL_ERR(priv, "Unable to prepare broadcast station\n");
1293                 spin_unlock_bh(&priv->sta_lock);
1294
1295                 return -EINVAL;
1296         }
1297
1298         priv->stations[sta_id].used |= IWL_STA_DRIVER_ACTIVE;
1299         priv->stations[sta_id].used |= IWL_STA_BCAST;
1300         spin_unlock_bh(&priv->sta_lock);
1301
1302         link_cmd = iwl_sta_alloc_lq(priv, ctx, sta_id);
1303         if (!link_cmd) {
1304                 IWL_ERR(priv,
1305                         "Unable to initialize rate scaling for bcast station.\n");
1306                 return -ENOMEM;
1307         }
1308
1309         spin_lock_bh(&priv->sta_lock);
1310         priv->stations[sta_id].lq = link_cmd;
1311         spin_unlock_bh(&priv->sta_lock);
1312
1313         return 0;
1314 }
1315
1316 /**
1317  * iwl_update_bcast_station - update broadcast station's LQ command
1318  *
1319  * Only used by iwlagn. Placed here to have all bcast station management
1320  * code together.
1321  */
1322 int iwl_update_bcast_station(struct iwl_priv *priv,
1323                              struct iwl_rxon_context *ctx)
1324 {
1325         struct iwl_link_quality_cmd *link_cmd;
1326         u8 sta_id = ctx->bcast_sta_id;
1327
1328         link_cmd = iwl_sta_alloc_lq(priv, ctx, sta_id);
1329         if (!link_cmd) {
1330                 IWL_ERR(priv, "Unable to initialize rate scaling for bcast station.\n");
1331                 return -ENOMEM;
1332         }
1333
1334         spin_lock_bh(&priv->sta_lock);
1335         if (priv->stations[sta_id].lq)
1336                 kfree(priv->stations[sta_id].lq);
1337         else
1338                 IWL_DEBUG_INFO(priv, "Bcast station rate scaling has not been initialized yet.\n");
1339         priv->stations[sta_id].lq = link_cmd;
1340         spin_unlock_bh(&priv->sta_lock);
1341
1342         return 0;
1343 }
1344
1345 int iwl_update_bcast_stations(struct iwl_priv *priv)
1346 {
1347         struct iwl_rxon_context *ctx;
1348         int ret = 0;
1349
1350         for_each_context(priv, ctx) {
1351                 ret = iwl_update_bcast_station(priv, ctx);
1352                 if (ret)
1353                         break;
1354         }
1355
1356         return ret;
1357 }
1358
1359 /**
1360  * iwl_sta_tx_modify_enable_tid - Enable Tx for this TID in station table
1361  */
1362 int iwl_sta_tx_modify_enable_tid(struct iwl_priv *priv, int sta_id, int tid)
1363 {
1364         struct iwl_addsta_cmd sta_cmd;
1365
1366         lockdep_assert_held(&priv->mutex);
1367
1368         /* Remove "disable" flag, to enable Tx for this TID */
1369         spin_lock_bh(&priv->sta_lock);
1370         priv->stations[sta_id].sta.sta.modify_mask = STA_MODIFY_TID_DISABLE_TX;
1371         priv->stations[sta_id].sta.tid_disable_tx &= cpu_to_le16(~(1 << tid));
1372         priv->stations[sta_id].sta.mode = STA_CONTROL_MODIFY_MSK;
1373         memcpy(&sta_cmd, &priv->stations[sta_id].sta, sizeof(struct iwl_addsta_cmd));
1374         spin_unlock_bh(&priv->sta_lock);
1375
1376         return iwl_send_add_sta(priv, &sta_cmd, 0);
1377 }
1378
1379 int iwl_sta_rx_agg_start(struct iwl_priv *priv, struct ieee80211_sta *sta,
1380                          int tid, u16 ssn)
1381 {
1382         int sta_id;
1383         struct iwl_addsta_cmd sta_cmd;
1384
1385         lockdep_assert_held(&priv->mutex);
1386
1387         sta_id = iwl_sta_id(sta);
1388         if (sta_id == IWL_INVALID_STATION)
1389                 return -ENXIO;
1390
1391         spin_lock_bh(&priv->sta_lock);
1392         priv->stations[sta_id].sta.station_flags_msk = 0;
1393         priv->stations[sta_id].sta.sta.modify_mask = STA_MODIFY_ADDBA_TID_MSK;
1394         priv->stations[sta_id].sta.add_immediate_ba_tid = (u8)tid;
1395         priv->stations[sta_id].sta.add_immediate_ba_ssn = cpu_to_le16(ssn);
1396         priv->stations[sta_id].sta.mode = STA_CONTROL_MODIFY_MSK;
1397         memcpy(&sta_cmd, &priv->stations[sta_id].sta, sizeof(struct iwl_addsta_cmd));
1398         spin_unlock_bh(&priv->sta_lock);
1399
1400         return iwl_send_add_sta(priv, &sta_cmd, 0);
1401 }
1402
1403 int iwl_sta_rx_agg_stop(struct iwl_priv *priv, struct ieee80211_sta *sta,
1404                         int tid)
1405 {
1406         int sta_id;
1407         struct iwl_addsta_cmd sta_cmd;
1408
1409         lockdep_assert_held(&priv->mutex);
1410
1411         sta_id = iwl_sta_id(sta);
1412         if (sta_id == IWL_INVALID_STATION) {
1413                 IWL_ERR(priv, "Invalid station for AGG tid %d\n", tid);
1414                 return -ENXIO;
1415         }
1416
1417         spin_lock_bh(&priv->sta_lock);
1418         priv->stations[sta_id].sta.station_flags_msk = 0;
1419         priv->stations[sta_id].sta.sta.modify_mask = STA_MODIFY_DELBA_TID_MSK;
1420         priv->stations[sta_id].sta.remove_immediate_ba_tid = (u8)tid;
1421         priv->stations[sta_id].sta.mode = STA_CONTROL_MODIFY_MSK;
1422         memcpy(&sta_cmd, &priv->stations[sta_id].sta, sizeof(struct iwl_addsta_cmd));
1423         spin_unlock_bh(&priv->sta_lock);
1424
1425         return iwl_send_add_sta(priv, &sta_cmd, 0);
1426 }
1427
1428
1429
1430 void iwl_sta_modify_sleep_tx_count(struct iwl_priv *priv, int sta_id, int cnt)
1431 {
1432         struct iwl_addsta_cmd cmd = {
1433                 .mode = STA_CONTROL_MODIFY_MSK,
1434                 .station_flags = STA_FLG_PWR_SAVE_MSK,
1435                 .station_flags_msk = STA_FLG_PWR_SAVE_MSK,
1436                 .sta.sta_id = sta_id,
1437                 .sta.modify_mask = STA_MODIFY_SLEEP_TX_COUNT_MSK,
1438                 .sleep_tx_count = cpu_to_le16(cnt),
1439         };
1440
1441         iwl_send_add_sta(priv, &cmd, CMD_ASYNC);
1442 }