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-sta.h"
  35 #include "iwl-agn.h"
  36 #include "iwl-trans.h"
  37
  38 static struct iwl_link_quality_cmd *
  39 iwl_sta_alloc_lq(struct iwl_priv *priv, struct iwl_rxon_context *ctx, u8 sta_id)
  40 {
  41         int i, r;
  42         struct iwl_link_quality_cmd *link_cmd;
  43         u32 rate_flags = 0;
  44         __le32 rate_n_flags;
  45
  46         link_cmd = kzalloc(sizeof(struct iwl_link_quality_cmd), GFP_KERNEL);
  47         if (!link_cmd) {
  48                 IWL_ERR(priv, "Unable to allocate memory for LQ cmd.\n");
  49                 return NULL;
  50         }
  51
  52         lockdep_assert_held(&priv->mutex);
  53
  54         /* Set up the rate scaling to start at selected rate, fall back
  55          * all the way down to 1M in IEEE order, and then spin on 1M */
  56         if (priv->band == IEEE80211_BAND_5GHZ)
  57                 r = IWL_RATE_6M_INDEX;
  58         else if (ctx && ctx->vif && ctx->vif->p2p)
  59                 r = IWL_RATE_6M_INDEX;
  60         else
  61                 r = IWL_RATE_1M_INDEX;
  62
  63         if (r >= IWL_FIRST_CCK_RATE && r <= IWL_LAST_CCK_RATE)
  64                 rate_flags |= RATE_MCS_CCK_MSK;
  65
  66         rate_flags |= first_antenna(priv->hw_params.valid_tx_ant) <<
  67                                 RATE_MCS_ANT_POS;
  68         rate_n_flags = iwl_hw_set_rate_n_flags(iwl_rates[r].plcp, rate_flags);
  69         for (i = 0; i < LINK_QUAL_MAX_RETRY_NUM; i++)
  70                 link_cmd->rs_table[i].rate_n_flags = rate_n_flags;
  71
  72         link_cmd->general_params.single_stream_ant_msk =
  73                                 first_antenna(priv->hw_params.valid_tx_ant);
  74
  75         link_cmd->general_params.dual_stream_ant_msk =
  76                 priv->hw_params.valid_tx_ant &
  77                 ~first_antenna(priv->hw_params.valid_tx_ant);
  78         if (!link_cmd->general_params.dual_stream_ant_msk) {
  79                 link_cmd->general_params.dual_stream_ant_msk = ANT_AB;
  80         } else if (num_of_ant(priv->hw_params.valid_tx_ant) == 2) {
  81                 link_cmd->general_params.dual_stream_ant_msk =
  82                         priv->hw_params.valid_tx_ant;
  83         }
  84
  85         link_cmd->agg_params.agg_dis_start_th = LINK_QUAL_AGG_DISABLE_START_DEF;
  86         link_cmd->agg_params.agg_time_limit =
  87                 cpu_to_le16(LINK_QUAL_AGG_TIME_LIMIT_DEF);
  88
  89         link_cmd->sta_id = sta_id;
  90
  91         return link_cmd;
  92 }
  93
  94 /*
  95  * iwlagn_add_bssid_station - Add the special IBSS BSSID station
  96  *
  97  * Function sleeps.
  98  */
  99 int iwlagn_add_bssid_station(struct iwl_priv *priv, struct iwl_rxon_context *ctx,
 100                              const u8 *addr, u8 *sta_id_r)
 101 {
 102         int ret;
 103         u8 sta_id;
 104         struct iwl_link_quality_cmd *link_cmd;
 105         unsigned long flags;
 106
 107         if (sta_id_r)
 108                 *sta_id_r = IWL_INVALID_STATION;
 109
 110         ret = iwl_add_station_common(priv, ctx, addr, 0, NULL, &sta_id);
 111         if (ret) {
 112                 IWL_ERR(priv, "Unable to add station %pM\n", addr);
 113                 return ret;
 114         }
 115
 116         if (sta_id_r)
 117                 *sta_id_r = sta_id;
 118
 119         spin_lock_irqsave(&priv->sta_lock, flags);
 120         priv->stations[sta_id].used |= IWL_STA_LOCAL;
 121         spin_unlock_irqrestore(&priv->sta_lock, flags);
 122
 123         /* Set up default rate scaling table in device's station table */
 124         link_cmd = iwl_sta_alloc_lq(priv, ctx, sta_id);
 125         if (!link_cmd) {
 126                 IWL_ERR(priv, "Unable to initialize rate scaling for station %pM.\n",
 127                         addr);
 128                 return -ENOMEM;
 129         }
 130
 131         ret = iwl_send_lq_cmd(priv, ctx, link_cmd, CMD_SYNC, true);
 132         if (ret)
 133                 IWL_ERR(priv, "Link quality command failed (%d)\n", ret);
 134
 135         spin_lock_irqsave(&priv->sta_lock, flags);
 136         priv->stations[sta_id].lq = link_cmd;
 137         spin_unlock_irqrestore(&priv->sta_lock, flags);
 138
 139         return 0;
 140 }
 141
 142 /*
 143  * static WEP keys
 144  *
 145  * For each context, the device has a table of 4 static WEP keys
 146  * (one for each key index) that is updated with the following
 147  * commands.
 148  */
 149
 150 static int iwl_send_static_wepkey_cmd(struct iwl_priv *priv,
 151                                       struct iwl_rxon_context *ctx,
 152                                       bool send_if_empty)
 153 {
 154         int i, not_empty = 0;
 155         u8 buff[sizeof(struct iwl_wep_cmd) +
 156                 sizeof(struct iwl_wep_key) * WEP_KEYS_MAX];
 157         struct iwl_wep_cmd *wep_cmd = (struct iwl_wep_cmd *)buff;
 158         size_t cmd_size  = sizeof(struct iwl_wep_cmd);
 159         struct iwl_host_cmd cmd = {
 160                 .id = ctx->wep_key_cmd,
 161                 .data = { wep_cmd, },
 162                 .flags = CMD_SYNC,
 163         };
 164
 165         might_sleep();
 166
 167         memset(wep_cmd, 0, cmd_size +
 168                         (sizeof(struct iwl_wep_key) * WEP_KEYS_MAX));
 169
 170         for (i = 0; i < WEP_KEYS_MAX ; i++) {
 171                 wep_cmd->key[i].key_index = i;
 172                 if (ctx->wep_keys[i].key_size) {
 173                         wep_cmd->key[i].key_offset = i;
 174                         not_empty = 1;
 175                 } else {
 176                         wep_cmd->key[i].key_offset = WEP_INVALID_OFFSET;
 177                 }
 178
 179                 wep_cmd->key[i].key_size = ctx->wep_keys[i].key_size;
 180                 memcpy(&wep_cmd->key[i].key[3], ctx->wep_keys[i].key,
 181                                 ctx->wep_keys[i].key_size);
 182         }
 183
 184         wep_cmd->global_key_type = WEP_KEY_WEP_TYPE;
 185         wep_cmd->num_keys = WEP_KEYS_MAX;
 186
 187         cmd_size += sizeof(struct iwl_wep_key) * WEP_KEYS_MAX;
 188
 189         cmd.len[0] = cmd_size;
 190
 191         if (not_empty || send_if_empty)
 192                 return trans_send_cmd(&priv->trans, &cmd);
 193         else
 194                 return 0;
 195 }
 196
 197 int iwl_restore_default_wep_keys(struct iwl_priv *priv,
 198                                  struct iwl_rxon_context *ctx)
 199 {
 200         lockdep_assert_held(&priv->mutex);
 201
 202         return iwl_send_static_wepkey_cmd(priv, ctx, false);
 203 }
 204
 205 int iwl_remove_default_wep_key(struct iwl_priv *priv,
 206                                struct iwl_rxon_context *ctx,
 207                                struct ieee80211_key_conf *keyconf)
 208 {
 209         int ret;
 210
 211         lockdep_assert_held(&priv->mutex);
 212
 213         IWL_DEBUG_WEP(priv, "Removing default WEP key: idx=%d\n",
 214                       keyconf->keyidx);
 215
 216         memset(&ctx->wep_keys[keyconf->keyidx], 0, sizeof(ctx->wep_keys[0]));
 217         if (iwl_is_rfkill(priv)) {
 218                 IWL_DEBUG_WEP(priv, "Not sending REPLY_WEPKEY command due to RFKILL.\n");
 219                 /* but keys in device are clear anyway so return success */
 220                 return 0;
 221         }
 222         ret = iwl_send_static_wepkey_cmd(priv, ctx, 1);
 223         IWL_DEBUG_WEP(priv, "Remove default WEP key: idx=%d ret=%d\n",
 224                       keyconf->keyidx, ret);
 225
 226         return ret;
 227 }
 228
 229 int iwl_set_default_wep_key(struct iwl_priv *priv,
 230                             struct iwl_rxon_context *ctx,
 231                             struct ieee80211_key_conf *keyconf)
 232 {
 233         int ret;
 234
 235         lockdep_assert_held(&priv->mutex);
 236
 237         if (keyconf->keylen != WEP_KEY_LEN_128 &&
 238             keyconf->keylen != WEP_KEY_LEN_64) {
 239                 IWL_DEBUG_WEP(priv, "Bad WEP key length %d\n", keyconf->keylen);
 240                 return -EINVAL;
 241         }
 242
 243         keyconf->hw_key_idx = IWLAGN_HW_KEY_DEFAULT;
 244
 245         ctx->wep_keys[keyconf->keyidx].key_size = keyconf->keylen;
 246         memcpy(&ctx->wep_keys[keyconf->keyidx].key, &keyconf->key,
 247                                                         keyconf->keylen);
 248
 249         ret = iwl_send_static_wepkey_cmd(priv, ctx, false);
 250         IWL_DEBUG_WEP(priv, "Set default WEP key: len=%d idx=%d ret=%d\n",
 251                 keyconf->keylen, keyconf->keyidx, ret);
 252
 253         return ret;
 254 }
 255
 256 /*
 257  * dynamic (per-station) keys
 258  *
 259  * The dynamic keys are a little more complicated. The device has
 260  * a key cache of up to STA_KEY_MAX_NUM/STA_KEY_MAX_NUM_PAN keys.
 261  * These are linked to stations by a table that contains an index
 262  * into the key table for each station/key index/{mcast,unicast},
 263  * i.e. it's basically an array of pointers like this:
 264  *      key_offset_t key_mapping[NUM_STATIONS][4][2];
 265  * (it really works differently, but you can think of it as such)
 266  *
 267  * The key uploading and linking happens in the same command, the
 268  * add station command with STA_MODIFY_KEY_MASK.
 269  */
 270
 271 static u8 iwlagn_key_sta_id(struct iwl_priv *priv,
 272                             struct ieee80211_vif *vif,
 273                             struct ieee80211_sta *sta)
 274 {
 275         struct iwl_vif_priv *vif_priv = (void *)vif->drv_priv;
 276         u8 sta_id = IWL_INVALID_STATION;
 277
 278         if (sta)
 279                 sta_id = iwl_sta_id(sta);
 280
 281         /*
 282          * The device expects GTKs for station interfaces to be
 283          * installed as GTKs for the AP station. If we have no
 284          * station ID, then use the ap_sta_id in that case.
 285          */
 286         if (!sta && vif && vif_priv->ctx) {
 287                 switch (vif->type) {
 288                 case NL80211_IFTYPE_STATION:
 289                         sta_id = vif_priv->ctx->ap_sta_id;
 290                         break;
 291                 default:
 292                         /*
 293                          * In all other cases, the key will be
 294                          * used either for TX only or is bound
 295                          * to a station already.
 296                          */
 297                         break;
 298                 }
 299         }
 300
 301         return sta_id;
 302 }
 303
 304 static int iwlagn_send_sta_key(struct iwl_priv *priv,
 305                                struct ieee80211_key_conf *keyconf,
 306                                u8 sta_id, u32 tkip_iv32, u16 *tkip_p1k,
 307                                u32 cmd_flags)
 308 {
 309         unsigned long flags;
 310         __le16 key_flags;
 311         struct iwl_addsta_cmd sta_cmd;
 312         int i;
 313
 314         spin_lock_irqsave(&priv->sta_lock, flags);
 315         memcpy(&sta_cmd, &priv->stations[sta_id].sta, sizeof(sta_cmd));
 316         spin_unlock_irqrestore(&priv->sta_lock, flags);
 317
 318         key_flags = cpu_to_le16(keyconf->keyidx << STA_KEY_FLG_KEYID_POS);
 319         key_flags |= STA_KEY_FLG_MAP_KEY_MSK;
 320
 321         switch (keyconf->cipher) {
 322         case WLAN_CIPHER_SUITE_CCMP:
 323                 key_flags |= STA_KEY_FLG_CCMP;
 324                 memcpy(sta_cmd.key.key, keyconf->key, keyconf->keylen);
 325                 break;
 326         case WLAN_CIPHER_SUITE_TKIP:
 327                 key_flags |= STA_KEY_FLG_TKIP;
 328                 sta_cmd.key.tkip_rx_tsc_byte2 = tkip_iv32;
 329                 for (i = 0; i < 5; i++)
 330                         sta_cmd.key.tkip_rx_ttak[i] = cpu_to_le16(tkip_p1k[i]);
 331                 memcpy(sta_cmd.key.key, keyconf->key, keyconf->keylen);
 332                 break;
 333         case WLAN_CIPHER_SUITE_WEP104:
 334                 key_flags |= STA_KEY_FLG_KEY_SIZE_MSK;
 335                 /* fall through */
 336         case WLAN_CIPHER_SUITE_WEP40:
 337                 key_flags |= STA_KEY_FLG_WEP;
 338                 memcpy(&sta_cmd.key.key[3], keyconf->key, keyconf->keylen);
 339                 break;
 340         default:
 341                 WARN_ON(1);
 342                 return -EINVAL;
 343         }
 344
 345         if (!(keyconf->flags & IEEE80211_KEY_FLAG_PAIRWISE))
 346                 key_flags |= STA_KEY_MULTICAST_MSK;
 347
 348         /* key pointer (offset) */
 349         sta_cmd.key.key_offset = keyconf->hw_key_idx;
 350
 351         sta_cmd.key.key_flags = key_flags;
 352         sta_cmd.mode = STA_CONTROL_MODIFY_MSK;
 353         sta_cmd.sta.modify_mask = STA_MODIFY_KEY_MASK;
 354
 355         return iwl_send_add_sta(priv, &sta_cmd, cmd_flags);
 356 }
 357
 358 void iwl_update_tkip_key(struct iwl_priv *priv,
 359                          struct ieee80211_vif *vif,
 360                          struct ieee80211_key_conf *keyconf,
 361                          struct ieee80211_sta *sta, u32 iv32, u16 *phase1key)
 362 {
 363         u8 sta_id = iwlagn_key_sta_id(priv, vif, sta);
 364
 365         if (sta_id == IWL_INVALID_STATION)
 366                 return;
 367
 368         if (iwl_scan_cancel(priv)) {
 369                 /* cancel scan failed, just live w/ bad key and rely
 370                    briefly on SW decryption */
 371                 return;
 372         }
 373
 374         iwlagn_send_sta_key(priv, keyconf, sta_id,
 375                             iv32, phase1key, CMD_ASYNC);
 376 }
 377
 378 int iwl_remove_dynamic_key(struct iwl_priv *priv,
 379                            struct iwl_rxon_context *ctx,
 380                            struct ieee80211_key_conf *keyconf,
 381                            struct ieee80211_sta *sta)
 382 {
 383         unsigned long flags;
 384         struct iwl_addsta_cmd sta_cmd;
 385         u8 sta_id = iwlagn_key_sta_id(priv, ctx->vif, sta);
 386
 387         /* if station isn't there, neither is the key */
 388         if (sta_id == IWL_INVALID_STATION)
 389                 return -ENOENT;
 390
 391         spin_lock_irqsave(&priv->sta_lock, flags);
 392         memcpy(&sta_cmd, &priv->stations[sta_id].sta, sizeof(sta_cmd));
 393         if (!(priv->stations[sta_id].used & IWL_STA_UCODE_ACTIVE))
 394                 sta_id = IWL_INVALID_STATION;
 395         spin_unlock_irqrestore(&priv->sta_lock, flags);
 396
 397         if (sta_id == IWL_INVALID_STATION)
 398                 return 0;
 399
 400         lockdep_assert_held(&priv->mutex);
 401
 402         ctx->key_mapping_keys--;
 403
 404         IWL_DEBUG_WEP(priv, "Remove dynamic key: idx=%d sta=%d\n",
 405                       keyconf->keyidx, sta_id);
 406
 407         if (!test_and_clear_bit(keyconf->hw_key_idx, &priv->ucode_key_table))
 408                 IWL_ERR(priv, "offset %d not used in uCode key table.\n",
 409                         keyconf->hw_key_idx);
 410
 411         sta_cmd.key.key_flags = STA_KEY_FLG_NO_ENC | STA_KEY_FLG_INVALID;
 412         sta_cmd.key.key_offset = WEP_INVALID_OFFSET;
 413         sta_cmd.sta.modify_mask = STA_MODIFY_KEY_MASK;
 414         sta_cmd.mode = STA_CONTROL_MODIFY_MSK;
 415
 416         return iwl_send_add_sta(priv, &sta_cmd, CMD_SYNC);
 417 }
 418
 419 int iwl_set_dynamic_key(struct iwl_priv *priv,
 420                         struct iwl_rxon_context *ctx,
 421                         struct ieee80211_key_conf *keyconf,
 422                         struct ieee80211_sta *sta)
 423 {
 424         struct ieee80211_key_seq seq;
 425         u16 p1k[5];
 426         int ret;
 427         u8 sta_id = iwlagn_key_sta_id(priv, ctx->vif, sta);
 428         const u8 *addr;
 429
 430         if (sta_id == IWL_INVALID_STATION)
 431                 return -EINVAL;
 432
 433         lockdep_assert_held(&priv->mutex);
 434
 435         keyconf->hw_key_idx = iwl_get_free_ucode_key_offset(priv);
 436         if (keyconf->hw_key_idx == WEP_INVALID_OFFSET)
 437                 return -ENOSPC;
 438
 439         ctx->key_mapping_keys++;
 440
 441         switch (keyconf->cipher) {
 442         case WLAN_CIPHER_SUITE_TKIP:
 443                 keyconf->flags |= IEEE80211_KEY_FLAG_GENERATE_MMIC;
 444                 keyconf->flags |= IEEE80211_KEY_FLAG_GENERATE_IV;
 445
 446                 if (sta)
 447                         addr = sta->addr;
 448                 else /* station mode case only */
 449                         addr = ctx->active.bssid_addr;
 450
 451                 /* pre-fill phase 1 key into device cache */
 452                 ieee80211_get_key_rx_seq(keyconf, 0, &seq);
 453                 ieee80211_get_tkip_rx_p1k(keyconf, addr, seq.tkip.iv32, p1k);
 454                 ret = iwlagn_send_sta_key(priv, keyconf, sta_id,
 455                                           seq.tkip.iv32, p1k, CMD_SYNC);
 456                 break;
 457         case WLAN_CIPHER_SUITE_CCMP:
 458                 keyconf->flags |= IEEE80211_KEY_FLAG_GENERATE_IV;
 459                 /* fall through */
 460         case WLAN_CIPHER_SUITE_WEP40:
 461         case WLAN_CIPHER_SUITE_WEP104:
 462                 ret = iwlagn_send_sta_key(priv, keyconf, sta_id,
 463                                           0, NULL, CMD_SYNC);
 464                 break;
 465         default:
 466                 IWL_ERR(priv, "Unknown cipher %x\n", keyconf->cipher);
 467                 ret = -EINVAL;
 468         }
 469
 470         if (ret) {
 471                 ctx->key_mapping_keys--;
 472                 clear_bit(keyconf->hw_key_idx, &priv->ucode_key_table);
 473         }
 474
 475         IWL_DEBUG_WEP(priv, "Set dynamic key: cipher=%x len=%d idx=%d sta=%pM ret=%d\n",
 476                       keyconf->cipher, keyconf->keylen, keyconf->keyidx,
 477                       sta ? sta->addr : NULL, ret);
 478
 479         return ret;
 480 }
 481
 482 /**
 483  * iwlagn_alloc_bcast_station - add broadcast station into driver's station table.
 484  *
 485  * This adds the broadcast station into the driver's station table
 486  * and marks it driver active, so that it will be restored to the
 487  * device at the next best time.
 488  */
 489 int iwlagn_alloc_bcast_station(struct iwl_priv *priv,
 490                                struct iwl_rxon_context *ctx)
 491 {
 492         struct iwl_link_quality_cmd *link_cmd;
 493         unsigned long flags;
 494         u8 sta_id;
 495
 496         spin_lock_irqsave(&priv->sta_lock, flags);
 497         sta_id = iwl_prep_station(priv, ctx, iwl_bcast_addr, false, NULL);
 498         if (sta_id == IWL_INVALID_STATION) {
 499                 IWL_ERR(priv, "Unable to prepare broadcast station\n");
 500                 spin_unlock_irqrestore(&priv->sta_lock, flags);
 501
 502                 return -EINVAL;
 503         }
 504
 505         priv->stations[sta_id].used |= IWL_STA_DRIVER_ACTIVE;
 506         priv->stations[sta_id].used |= IWL_STA_BCAST;
 507         spin_unlock_irqrestore(&priv->sta_lock, flags);
 508
 509         link_cmd = iwl_sta_alloc_lq(priv, ctx, sta_id);
 510         if (!link_cmd) {
 511                 IWL_ERR(priv,
 512                         "Unable to initialize rate scaling for bcast station.\n");
 513                 return -ENOMEM;
 514         }
 515
 516         spin_lock_irqsave(&priv->sta_lock, flags);
 517         priv->stations[sta_id].lq = link_cmd;
 518         spin_unlock_irqrestore(&priv->sta_lock, flags);
 519
 520         return 0;
 521 }
 522
 523 /**
 524  * iwl_update_bcast_station - update broadcast station's LQ command
 525  *
 526  * Only used by iwlagn. Placed here to have all bcast station management
 527  * code together.
 528  */
 529 int iwl_update_bcast_station(struct iwl_priv *priv,
 530                              struct iwl_rxon_context *ctx)
 531 {
 532         unsigned long flags;
 533         struct iwl_link_quality_cmd *link_cmd;
 534         u8 sta_id = ctx->bcast_sta_id;
 535
 536         link_cmd = iwl_sta_alloc_lq(priv, ctx, sta_id);
 537         if (!link_cmd) {
 538                 IWL_ERR(priv, "Unable to initialize rate scaling for bcast station.\n");
 539                 return -ENOMEM;
 540         }
 541
 542         spin_lock_irqsave(&priv->sta_lock, flags);
 543         if (priv->stations[sta_id].lq)
 544                 kfree(priv->stations[sta_id].lq);
 545         else
 546                 IWL_DEBUG_INFO(priv, "Bcast station rate scaling has not been initialized yet.\n");
 547         priv->stations[sta_id].lq = link_cmd;
 548         spin_unlock_irqrestore(&priv->sta_lock, flags);
 549
 550         return 0;
 551 }
 552
 553 int iwl_update_bcast_stations(struct iwl_priv *priv)
 554 {
 555         struct iwl_rxon_context *ctx;
 556         int ret = 0;
 557
 558         for_each_context(priv, ctx) {
 559                 ret = iwl_update_bcast_station(priv, ctx);
 560                 if (ret)
 561                         break;
 562         }
 563
 564         return ret;
 565 }
 566
 567 /**
 568  * iwl_sta_tx_modify_enable_tid - Enable Tx for this TID in station table
 569  */
 570 int iwl_sta_tx_modify_enable_tid(struct iwl_priv *priv, int sta_id, int tid)
 571 {
 572         unsigned long flags;
 573         struct iwl_addsta_cmd sta_cmd;
 574
 575         lockdep_assert_held(&priv->mutex);
 576
 577         /* Remove "disable" flag, to enable Tx for this TID */
 578         spin_lock_irqsave(&priv->sta_lock, flags);
 579         priv->stations[sta_id].sta.sta.modify_mask = STA_MODIFY_TID_DISABLE_TX;
 580         priv->stations[sta_id].sta.tid_disable_tx &= cpu_to_le16(~(1 << tid));
 581         priv->stations[sta_id].sta.mode = STA_CONTROL_MODIFY_MSK;
 582         memcpy(&sta_cmd, &priv->stations[sta_id].sta, sizeof(struct iwl_addsta_cmd));
 583         spin_unlock_irqrestore(&priv->sta_lock, flags);
 584
 585         return iwl_send_add_sta(priv, &sta_cmd, CMD_SYNC);
 586 }
 587
 588 int iwl_sta_rx_agg_start(struct iwl_priv *priv, struct ieee80211_sta *sta,
 589                          int tid, u16 ssn)
 590 {
 591         unsigned long flags;
 592         int sta_id;
 593         struct iwl_addsta_cmd sta_cmd;
 594
 595         lockdep_assert_held(&priv->mutex);
 596
 597         sta_id = iwl_sta_id(sta);
 598         if (sta_id == IWL_INVALID_STATION)
 599                 return -ENXIO;
 600
 601         spin_lock_irqsave(&priv->sta_lock, flags);
 602         priv->stations[sta_id].sta.station_flags_msk = 0;
 603         priv->stations[sta_id].sta.sta.modify_mask = STA_MODIFY_ADDBA_TID_MSK;
 604         priv->stations[sta_id].sta.add_immediate_ba_tid = (u8)tid;
 605         priv->stations[sta_id].sta.add_immediate_ba_ssn = cpu_to_le16(ssn);
 606         priv->stations[sta_id].sta.mode = STA_CONTROL_MODIFY_MSK;
 607         memcpy(&sta_cmd, &priv->stations[sta_id].sta, sizeof(struct iwl_addsta_cmd));
 608         spin_unlock_irqrestore(&priv->sta_lock, flags);
 609
 610         return iwl_send_add_sta(priv, &sta_cmd, CMD_SYNC);
 611 }
 612
 613 int iwl_sta_rx_agg_stop(struct iwl_priv *priv, struct ieee80211_sta *sta,
 614                         int tid)
 615 {
 616         unsigned long flags;
 617         int sta_id;
 618         struct iwl_addsta_cmd sta_cmd;
 619
 620         lockdep_assert_held(&priv->mutex);
 621
 622         sta_id = iwl_sta_id(sta);
 623         if (sta_id == IWL_INVALID_STATION) {
 624                 IWL_ERR(priv, "Invalid station for AGG tid %d\n", tid);
 625                 return -ENXIO;
 626         }
 627
 628         spin_lock_irqsave(&priv->sta_lock, flags);
 629         priv->stations[sta_id].sta.station_flags_msk = 0;
 630         priv->stations[sta_id].sta.sta.modify_mask = STA_MODIFY_DELBA_TID_MSK;
 631         priv->stations[sta_id].sta.remove_immediate_ba_tid = (u8)tid;
 632         priv->stations[sta_id].sta.mode = STA_CONTROL_MODIFY_MSK;
 633         memcpy(&sta_cmd, &priv->stations[sta_id].sta, sizeof(struct iwl_addsta_cmd));
 634         spin_unlock_irqrestore(&priv->sta_lock, flags);
 635
 636         return iwl_send_add_sta(priv, &sta_cmd, CMD_SYNC);
 637 }
 638
 639 static void iwl_sta_modify_ps_wake(struct iwl_priv *priv, int sta_id)
 640 {
 641         unsigned long flags;
 642
 643         spin_lock_irqsave(&priv->sta_lock, flags);
 644         priv->stations[sta_id].sta.station_flags &= ~STA_FLG_PWR_SAVE_MSK;
 645         priv->stations[sta_id].sta.station_flags_msk = STA_FLG_PWR_SAVE_MSK;
 646         priv->stations[sta_id].sta.sta.modify_mask = 0;
 647         priv->stations[sta_id].sta.sleep_tx_count = 0;
 648         priv->stations[sta_id].sta.mode = STA_CONTROL_MODIFY_MSK;
 649         iwl_send_add_sta(priv, &priv->stations[sta_id].sta, CMD_ASYNC);
 650         spin_unlock_irqrestore(&priv->sta_lock, flags);
 651
 652 }
 653
 654 void iwl_sta_modify_sleep_tx_count(struct iwl_priv *priv, int sta_id, int cnt)
 655 {
 656         unsigned long flags;
 657
 658         spin_lock_irqsave(&priv->sta_lock, flags);
 659         priv->stations[sta_id].sta.station_flags |= STA_FLG_PWR_SAVE_MSK;
 660         priv->stations[sta_id].sta.station_flags_msk = STA_FLG_PWR_SAVE_MSK;
 661         priv->stations[sta_id].sta.sta.modify_mask =
 662                                         STA_MODIFY_SLEEP_TX_COUNT_MSK;
 663         priv->stations[sta_id].sta.sleep_tx_count = cpu_to_le16(cnt);
 664         priv->stations[sta_id].sta.mode = STA_CONTROL_MODIFY_MSK;
 665         iwl_send_add_sta(priv, &priv->stations[sta_id].sta, CMD_ASYNC);
 666         spin_unlock_irqrestore(&priv->sta_lock, flags);
 667
 668 }
 669
 670 void iwlagn_mac_sta_notify(struct ieee80211_hw *hw,
 671                            struct ieee80211_vif *vif,
 672                            enum sta_notify_cmd cmd,
 673                            struct ieee80211_sta *sta)
 674 {
 675         struct iwl_priv *priv = hw->priv;
 676         struct iwl_station_priv *sta_priv = (void *)sta->drv_priv;
 677         int sta_id;
 678
 679         switch (cmd) {
 680         case STA_NOTIFY_SLEEP:
 681                 WARN_ON(!sta_priv->client);
 682                 sta_priv->asleep = true;
 683                 if (atomic_read(&sta_priv->pending_frames) > 0)
 684                         ieee80211_sta_block_awake(hw, sta, true);
 685                 break;
 686         case STA_NOTIFY_AWAKE:
 687                 WARN_ON(!sta_priv->client);
 688                 if (!sta_priv->asleep)
 689                         break;
 690                 sta_priv->asleep = false;
 691                 sta_id = iwl_sta_id(sta);
 692                 if (sta_id != IWL_INVALID_STATION)
 693                         iwl_sta_modify_ps_wake(priv, sta_id);
 694                 break;
 695         default:
 696                 break;
 697         }
 698 }