SAFE public projects git trees. - safe/jmp/linux-2.6/blob - drivers/net/wireless/iwlwifi/iwl-sta.c

   1 /******************************************************************************
   2  *
   3  * Copyright(c) 2003 - 2008 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  * James P. Ketrenos <ipw2100-admin@linux.intel.com>
  26  * Intel Corporation, 5200 N.E. Elam Young Parkway, Hillsboro, OR 97124-6497
  27  *
  28  *****************************************************************************/
  29
  30 #include <net/mac80211.h>
  31 #include <linux/etherdevice.h>
  32
  33 #include "iwl-dev.h"
  34 #include "iwl-core.h"
  35 #include "iwl-sta.h"
  36 #include "iwl-helpers.h"
  37
  38
  39 #define IWL_STA_DRIVER_ACTIVE BIT(0) /* driver entry is active */
  40 #define IWL_STA_UCODE_ACTIVE  BIT(1) /* ucode entry is active */
  41
  42 u8 iwl_find_station(struct iwl_priv *priv, const u8 *addr)
  43 {
  44         int i;
  45         int start = 0;
  46         int ret = IWL_INVALID_STATION;
  47         unsigned long flags;
  48
  49         if ((priv->iw_mode == NL80211_IFTYPE_ADHOC) ||
  50             (priv->iw_mode == NL80211_IFTYPE_AP))
  51                 start = IWL_STA_ID;
  52
  53         if (is_broadcast_ether_addr(addr))
  54                 return priv->hw_params.bcast_sta_id;
  55
  56         spin_lock_irqsave(&priv->sta_lock, flags);
  57         for (i = start; i < priv->hw_params.max_stations; i++)
  58                 if (priv->stations[i].used &&
  59                     (!compare_ether_addr(priv->stations[i].sta.sta.addr,
  60                                          addr))) {
  61                         ret = i;
  62                         goto out;
  63                 }
  64
  65         IWL_DEBUG_ASSOC_LIMIT("can not find STA %pM total %d\n",
  66                               addr, priv->num_stations);
  67
  68  out:
  69         spin_unlock_irqrestore(&priv->sta_lock, flags);
  70         return ret;
  71 }
  72 EXPORT_SYMBOL(iwl_find_station);
  73
  74 int iwl_get_ra_sta_id(struct iwl_priv *priv, struct ieee80211_hdr *hdr)
  75 {
  76         if (priv->iw_mode == NL80211_IFTYPE_STATION) {
  77                 return IWL_AP_ID;
  78         } else {
  79                 u8 *da = ieee80211_get_DA(hdr);
  80                 return iwl_find_station(priv, da);
  81         }
  82 }
  83 EXPORT_SYMBOL(iwl_get_ra_sta_id);
  84
  85 static void iwl_sta_ucode_activate(struct iwl_priv *priv, u8 sta_id)
  86 {
  87         unsigned long flags;
  88
  89         spin_lock_irqsave(&priv->sta_lock, flags);
  90
  91         if (!(priv->stations[sta_id].used & IWL_STA_DRIVER_ACTIVE))
  92                 IWL_ERROR("ACTIVATE a non DRIVER active station %d\n", sta_id);
  93
  94         priv->stations[sta_id].used |= IWL_STA_UCODE_ACTIVE;
  95         IWL_DEBUG_ASSOC("Added STA to Ucode: %pM\n",
  96                         priv->stations[sta_id].sta.sta.addr);
  97
  98         spin_unlock_irqrestore(&priv->sta_lock, flags);
  99 }
 100
 101 static int iwl_add_sta_callback(struct iwl_priv *priv,
 102                                    struct iwl_cmd *cmd, struct sk_buff *skb)
 103 {
 104         struct iwl_rx_packet *res = NULL;
 105         struct iwl_addsta_cmd *addsta =
 106                 (struct iwl_addsta_cmd *)cmd->cmd.payload;
 107         u8 sta_id = addsta->sta.sta_id;
 108
 109         if (!skb) {
 110                 IWL_ERROR("Error: Response NULL in REPLY_ADD_STA.\n");
 111                 return 1;
 112         }
 113
 114         res = (struct iwl_rx_packet *)skb->data;
 115         if (res->hdr.flags & IWL_CMD_FAILED_MSK) {
 116                 IWL_ERROR("Bad return from REPLY_ADD_STA (0x%08X)\n",
 117                           res->hdr.flags);
 118                 return 1;
 119         }
 120
 121         switch (res->u.add_sta.status) {
 122         case ADD_STA_SUCCESS_MSK:
 123                 iwl_sta_ucode_activate(priv, sta_id);
 124                  /* fall through */
 125         default:
 126                 IWL_DEBUG_HC("Received REPLY_ADD_STA:(0x%08X)\n",
 127                              res->u.add_sta.status);
 128                 break;
 129         }
 130
 131         /* We didn't cache the SKB; let the caller free it */
 132         return 1;
 133 }
 134
 135 int iwl_send_add_sta(struct iwl_priv *priv,
 136                      struct iwl_addsta_cmd *sta, u8 flags)
 137 {
 138         struct iwl_rx_packet *res = NULL;
 139         int ret = 0;
 140         u8 data[sizeof(*sta)];
 141         struct iwl_host_cmd cmd = {
 142                 .id = REPLY_ADD_STA,
 143                 .meta.flags = flags,
 144                 .data = data,
 145         };
 146
 147         if (flags & CMD_ASYNC)
 148                 cmd.meta.u.callback = iwl_add_sta_callback;
 149         else
 150                 cmd.meta.flags |= CMD_WANT_SKB;
 151
 152         cmd.len = priv->cfg->ops->utils->build_addsta_hcmd(sta, data);
 153         ret = iwl_send_cmd(priv, &cmd);
 154
 155         if (ret || (flags & CMD_ASYNC))
 156                 return ret;
 157
 158         res = (struct iwl_rx_packet *)cmd.meta.u.skb->data;
 159         if (res->hdr.flags & IWL_CMD_FAILED_MSK) {
 160                 IWL_ERROR("Bad return from REPLY_ADD_STA (0x%08X)\n",
 161                           res->hdr.flags);
 162                 ret = -EIO;
 163         }
 164
 165         if (ret == 0) {
 166                 switch (res->u.add_sta.status) {
 167                 case ADD_STA_SUCCESS_MSK:
 168                         iwl_sta_ucode_activate(priv, sta->sta.sta_id);
 169                         IWL_DEBUG_INFO("REPLY_ADD_STA PASSED\n");
 170                         break;
 171                 default:
 172                         ret = -EIO;
 173                         IWL_WARNING("REPLY_ADD_STA failed\n");
 174                         break;
 175                 }
 176         }
 177
 178         priv->alloc_rxb_skb--;
 179         dev_kfree_skb_any(cmd.meta.u.skb);
 180
 181         return ret;
 182 }
 183 EXPORT_SYMBOL(iwl_send_add_sta);
 184
 185 static void iwl_set_ht_add_station(struct iwl_priv *priv, u8 index,
 186                                    struct ieee80211_sta_ht_cap *sta_ht_inf)
 187 {
 188         __le32 sta_flags;
 189         u8 mimo_ps_mode;
 190
 191         if (!sta_ht_inf || !sta_ht_inf->ht_supported)
 192                 goto done;
 193
 194         mimo_ps_mode = (sta_ht_inf->cap & IEEE80211_HT_CAP_SM_PS) >> 2;
 195
 196         sta_flags = priv->stations[index].sta.station_flags;
 197
 198         sta_flags &= ~(STA_FLG_RTS_MIMO_PROT_MSK | STA_FLG_MIMO_DIS_MSK);
 199
 200         switch (mimo_ps_mode) {
 201         case WLAN_HT_CAP_SM_PS_STATIC:
 202                 sta_flags |= STA_FLG_MIMO_DIS_MSK;
 203                 break;
 204         case WLAN_HT_CAP_SM_PS_DYNAMIC:
 205                 sta_flags |= STA_FLG_RTS_MIMO_PROT_MSK;
 206                 break;
 207         case WLAN_HT_CAP_SM_PS_DISABLED:
 208                 break;
 209         default:
 210                 IWL_WARNING("Invalid MIMO PS mode %d\n", mimo_ps_mode);
 211                 break;
 212         }
 213
 214         sta_flags |= cpu_to_le32(
 215               (u32)sta_ht_inf->ampdu_factor << STA_FLG_MAX_AGG_SIZE_POS);
 216
 217         sta_flags |= cpu_to_le32(
 218               (u32)sta_ht_inf->ampdu_density << STA_FLG_AGG_MPDU_DENSITY_POS);
 219
 220         if (iwl_is_fat_tx_allowed(priv, sta_ht_inf))
 221                 sta_flags |= STA_FLG_FAT_EN_MSK;
 222         else
 223                 sta_flags &= ~STA_FLG_FAT_EN_MSK;
 224
 225         priv->stations[index].sta.station_flags = sta_flags;
 226  done:
 227         return;
 228 }
 229
 230 /**
 231  * iwl_add_station_flags - Add station to tables in driver and device
 232  */
 233 u8 iwl_add_station_flags(struct iwl_priv *priv, const u8 *addr, int is_ap,
 234                          u8 flags, struct ieee80211_sta_ht_cap *ht_info)
 235 {
 236         int i;
 237         int sta_id = IWL_INVALID_STATION;
 238         struct iwl_station_entry *station;
 239         unsigned long flags_spin;
 240
 241         spin_lock_irqsave(&priv->sta_lock, flags_spin);
 242         if (is_ap)
 243                 sta_id = IWL_AP_ID;
 244         else if (is_broadcast_ether_addr(addr))
 245                 sta_id = priv->hw_params.bcast_sta_id;
 246         else
 247                 for (i = IWL_STA_ID; i < priv->hw_params.max_stations; i++) {
 248                         if (!compare_ether_addr(priv->stations[i].sta.sta.addr,
 249                                                 addr)) {
 250                                 sta_id = i;
 251                                 break;
 252                         }
 253
 254                         if (!priv->stations[i].used &&
 255                             sta_id == IWL_INVALID_STATION)
 256                                 sta_id = i;
 257                 }
 258
 259         /* These two conditions have the same outcome, but keep them separate
 260            since they have different meanings */
 261         if (unlikely(sta_id == IWL_INVALID_STATION)) {
 262                 spin_unlock_irqrestore(&priv->sta_lock, flags_spin);
 263                 return sta_id;
 264         }
 265
 266         if (priv->stations[sta_id].used &&
 267             !compare_ether_addr(priv->stations[sta_id].sta.sta.addr, addr)) {
 268                 spin_unlock_irqrestore(&priv->sta_lock, flags_spin);
 269                 return sta_id;
 270         }
 271
 272
 273         station = &priv->stations[sta_id];
 274         station->used = IWL_STA_DRIVER_ACTIVE;
 275         IWL_DEBUG_ASSOC("Add STA to driver ID %d: %pM\n",
 276                         sta_id, addr);
 277         priv->num_stations++;
 278
 279         /* Set up the REPLY_ADD_STA command to send to device */
 280         memset(&station->sta, 0, sizeof(struct iwl_addsta_cmd));
 281         memcpy(station->sta.sta.addr, addr, ETH_ALEN);
 282         station->sta.mode = 0;
 283         station->sta.sta.sta_id = sta_id;
 284         station->sta.station_flags = 0;
 285
 286         /* BCAST station and IBSS stations do not work in HT mode */
 287         if (sta_id != priv->hw_params.bcast_sta_id &&
 288             priv->iw_mode != NL80211_IFTYPE_ADHOC)
 289                 iwl_set_ht_add_station(priv, sta_id, ht_info);
 290
 291         spin_unlock_irqrestore(&priv->sta_lock, flags_spin);
 292
 293         /* Add station to device's station table */
 294         iwl_send_add_sta(priv, &station->sta, flags);
 295         return sta_id;
 296
 297 }
 298 EXPORT_SYMBOL(iwl_add_station_flags);
 299
 300 static void iwl_sta_ucode_deactivate(struct iwl_priv *priv, const char *addr)
 301 {
 302         unsigned long flags;
 303         u8 sta_id = iwl_find_station(priv, addr);
 304
 305         BUG_ON(sta_id == IWL_INVALID_STATION);
 306
 307         IWL_DEBUG_ASSOC("Removed STA from Ucode: %pM\n", addr);
 308
 309         spin_lock_irqsave(&priv->sta_lock, flags);
 310
 311         /* Ucode must be active and driver must be non active */
 312         if (priv->stations[sta_id].used != IWL_STA_UCODE_ACTIVE)
 313                 IWL_ERROR("removed non active STA %d\n", sta_id);
 314
 315         priv->stations[sta_id].used &= ~IWL_STA_UCODE_ACTIVE;
 316
 317         memset(&priv->stations[sta_id], 0, sizeof(struct iwl_station_entry));
 318         spin_unlock_irqrestore(&priv->sta_lock, flags);
 319 }
 320
 321 static int iwl_remove_sta_callback(struct iwl_priv *priv,
 322                                    struct iwl_cmd *cmd, struct sk_buff *skb)
 323 {
 324         struct iwl_rx_packet *res = NULL;
 325         struct iwl_rem_sta_cmd *rm_sta =
 326                  (struct iwl_rem_sta_cmd *)cmd->cmd.payload;
 327         const char *addr = rm_sta->addr;
 328
 329         if (!skb) {
 330                 IWL_ERROR("Error: Response NULL in REPLY_REMOVE_STA.\n");
 331                 return 1;
 332         }
 333
 334         res = (struct iwl_rx_packet *)skb->data;
 335         if (res->hdr.flags & IWL_CMD_FAILED_MSK) {
 336                 IWL_ERROR("Bad return from REPLY_REMOVE_STA (0x%08X)\n",
 337                 res->hdr.flags);
 338                 return 1;
 339         }
 340
 341         switch (res->u.rem_sta.status) {
 342         case REM_STA_SUCCESS_MSK:
 343                 iwl_sta_ucode_deactivate(priv, addr);
 344                 break;
 345         default:
 346                 IWL_ERROR("REPLY_REMOVE_STA failed\n");
 347                 break;
 348         }
 349
 350         /* We didn't cache the SKB; let the caller free it */
 351         return 1;
 352 }
 353
 354 static int iwl_send_remove_station(struct iwl_priv *priv, const u8 *addr,
 355                                    u8 flags)
 356 {
 357         struct iwl_rx_packet *res = NULL;
 358         int ret;
 359
 360         struct iwl_rem_sta_cmd rm_sta_cmd;
 361
 362         struct iwl_host_cmd cmd = {
 363                 .id = REPLY_REMOVE_STA,
 364                 .len = sizeof(struct iwl_rem_sta_cmd),
 365                 .meta.flags = flags,
 366                 .data = &rm_sta_cmd,
 367         };
 368
 369         memset(&rm_sta_cmd, 0, sizeof(rm_sta_cmd));
 370         rm_sta_cmd.num_sta = 1;
 371         memcpy(&rm_sta_cmd.addr, addr , ETH_ALEN);
 372
 373         if (flags & CMD_ASYNC)
 374                 cmd.meta.u.callback = iwl_remove_sta_callback;
 375         else
 376                 cmd.meta.flags |= CMD_WANT_SKB;
 377         ret = iwl_send_cmd(priv, &cmd);
 378
 379         if (ret || (flags & CMD_ASYNC))
 380                 return ret;
 381
 382         res = (struct iwl_rx_packet *)cmd.meta.u.skb->data;
 383         if (res->hdr.flags & IWL_CMD_FAILED_MSK) {
 384                 IWL_ERROR("Bad return from REPLY_REMOVE_STA (0x%08X)\n",
 385                           res->hdr.flags);
 386                 ret = -EIO;
 387         }
 388
 389         if (!ret) {
 390                 switch (res->u.rem_sta.status) {
 391                 case REM_STA_SUCCESS_MSK:
 392                         iwl_sta_ucode_deactivate(priv, addr);
 393                         IWL_DEBUG_ASSOC("REPLY_REMOVE_STA PASSED\n");
 394                         break;
 395                 default:
 396                         ret = -EIO;
 397                         IWL_ERROR("REPLY_REMOVE_STA failed\n");
 398                         break;
 399                 }
 400         }
 401
 402         priv->alloc_rxb_skb--;
 403         dev_kfree_skb_any(cmd.meta.u.skb);
 404
 405         return ret;
 406 }
 407
 408 /**
 409  * iwl_remove_station - Remove driver's knowledge of station.
 410  */
 411 int iwl_remove_station(struct iwl_priv *priv, const u8 *addr, int is_ap)
 412 {
 413         int sta_id = IWL_INVALID_STATION;
 414         int i, ret = -EINVAL;
 415         unsigned long flags;
 416
 417         spin_lock_irqsave(&priv->sta_lock, flags);
 418
 419         if (is_ap)
 420                 sta_id = IWL_AP_ID;
 421         else if (is_broadcast_ether_addr(addr))
 422                 sta_id = priv->hw_params.bcast_sta_id;
 423         else
 424                 for (i = IWL_STA_ID; i < priv->hw_params.max_stations; i++)
 425                         if (priv->stations[i].used &&
 426                             !compare_ether_addr(priv->stations[i].sta.sta.addr,
 427                                                 addr)) {
 428                                 sta_id = i;
 429                                 break;
 430                         }
 431
 432         if (unlikely(sta_id == IWL_INVALID_STATION))
 433                 goto out;
 434
 435         IWL_DEBUG_ASSOC("Removing STA from driver:%d  %pM\n",
 436                 sta_id, addr);
 437
 438         if (!(priv->stations[sta_id].used & IWL_STA_DRIVER_ACTIVE)) {
 439                 IWL_ERROR("Removing %pM but non DRIVER active\n",
 440                                 addr);
 441                 goto out;
 442         }
 443
 444         if (!(priv->stations[sta_id].used & IWL_STA_UCODE_ACTIVE)) {
 445                 IWL_ERROR("Removing %pM but non UCODE active\n",
 446                                 addr);
 447                 goto out;
 448         }
 449
 450
 451         priv->stations[sta_id].used &= ~IWL_STA_DRIVER_ACTIVE;
 452
 453         priv->num_stations--;
 454
 455         BUG_ON(priv->num_stations < 0);
 456
 457         spin_unlock_irqrestore(&priv->sta_lock, flags);
 458
 459         ret = iwl_send_remove_station(priv, addr, CMD_ASYNC);
 460         return ret;
 461 out:
 462         spin_unlock_irqrestore(&priv->sta_lock, flags);
 463         return ret;
 464 }
 465 EXPORT_SYMBOL(iwl_remove_station);
 466
 467 static int iwl_get_free_ucode_key_index(struct iwl_priv *priv)
 468 {
 469         int i;
 470
 471         for (i = 0; i < STA_KEY_MAX_NUM; i++)
 472                 if (!test_and_set_bit(i, &priv->ucode_key_table))
 473                         return i;
 474
 475         return -1;
 476 }
 477
 478 int iwl_send_static_wepkey_cmd(struct iwl_priv *priv, u8 send_if_empty)
 479 {
 480         int i, not_empty = 0;
 481         u8 buff[sizeof(struct iwl_wep_cmd) +
 482                 sizeof(struct iwl_wep_key) * WEP_KEYS_MAX];
 483         struct iwl_wep_cmd *wep_cmd = (struct iwl_wep_cmd *)buff;
 484         size_t cmd_size  = sizeof(struct iwl_wep_cmd);
 485         struct iwl_host_cmd cmd = {
 486                 .id = REPLY_WEPKEY,
 487                 .data = wep_cmd,
 488                 .meta.flags = CMD_ASYNC,
 489         };
 490
 491         memset(wep_cmd, 0, cmd_size +
 492                         (sizeof(struct iwl_wep_key) * WEP_KEYS_MAX));
 493
 494         for (i = 0; i < WEP_KEYS_MAX ; i++) {
 495                 wep_cmd->key[i].key_index = i;
 496                 if (priv->wep_keys[i].key_size) {
 497                         wep_cmd->key[i].key_offset = i;
 498                         not_empty = 1;
 499                 } else {
 500                         wep_cmd->key[i].key_offset = WEP_INVALID_OFFSET;
 501                 }
 502
 503                 wep_cmd->key[i].key_size = priv->wep_keys[i].key_size;
 504                 memcpy(&wep_cmd->key[i].key[3], priv->wep_keys[i].key,
 505                                 priv->wep_keys[i].key_size);
 506         }
 507
 508         wep_cmd->global_key_type = WEP_KEY_WEP_TYPE;
 509         wep_cmd->num_keys = WEP_KEYS_MAX;
 510
 511         cmd_size += sizeof(struct iwl_wep_key) * WEP_KEYS_MAX;
 512
 513         cmd.len = cmd_size;
 514
 515         if (not_empty || send_if_empty)
 516                 return iwl_send_cmd(priv, &cmd);
 517         else
 518                 return 0;
 519 }
 520 EXPORT_SYMBOL(iwl_send_static_wepkey_cmd);
 521
 522 int iwl_remove_default_wep_key(struct iwl_priv *priv,
 523                                struct ieee80211_key_conf *keyconf)
 524 {
 525         int ret;
 526         unsigned long flags;
 527
 528         spin_lock_irqsave(&priv->sta_lock, flags);
 529
 530         if (!test_and_clear_bit(keyconf->keyidx, &priv->ucode_key_table))
 531                 IWL_ERROR("index %d not used in uCode key table.\n",
 532                           keyconf->keyidx);
 533
 534         priv->default_wep_key--;
 535         memset(&priv->wep_keys[keyconf->keyidx], 0, sizeof(priv->wep_keys[0]));
 536         ret = iwl_send_static_wepkey_cmd(priv, 1);
 537         IWL_DEBUG_WEP("Remove default WEP key: idx=%d ret=%d\n",
 538                       keyconf->keyidx, ret);
 539         spin_unlock_irqrestore(&priv->sta_lock, flags);
 540
 541         return ret;
 542 }
 543 EXPORT_SYMBOL(iwl_remove_default_wep_key);
 544
 545 int iwl_set_default_wep_key(struct iwl_priv *priv,
 546                             struct ieee80211_key_conf *keyconf)
 547 {
 548         int ret;
 549         unsigned long flags;
 550
 551         if (keyconf->keylen != WEP_KEY_LEN_128 &&
 552             keyconf->keylen != WEP_KEY_LEN_64) {
 553                 IWL_DEBUG_WEP("Bad WEP key length %d\n", keyconf->keylen);
 554                 return -EINVAL;
 555         }
 556
 557         keyconf->flags &= ~IEEE80211_KEY_FLAG_GENERATE_IV;
 558         keyconf->hw_key_idx = HW_KEY_DEFAULT;
 559         priv->stations[IWL_AP_ID].keyinfo.alg = ALG_WEP;
 560
 561         spin_lock_irqsave(&priv->sta_lock, flags);
 562         priv->default_wep_key++;
 563
 564         if (test_and_set_bit(keyconf->keyidx, &priv->ucode_key_table))
 565                 IWL_ERROR("index %d already used in uCode key table.\n",
 566                         keyconf->keyidx);
 567
 568         priv->wep_keys[keyconf->keyidx].key_size = keyconf->keylen;
 569         memcpy(&priv->wep_keys[keyconf->keyidx].key, &keyconf->key,
 570                                                         keyconf->keylen);
 571
 572         ret = iwl_send_static_wepkey_cmd(priv, 0);
 573         IWL_DEBUG_WEP("Set default WEP key: len=%d idx=%d ret=%d\n",
 574                 keyconf->keylen, keyconf->keyidx, ret);
 575         spin_unlock_irqrestore(&priv->sta_lock, flags);
 576
 577         return ret;
 578 }
 579 EXPORT_SYMBOL(iwl_set_default_wep_key);
 580
 581 static int iwl_set_wep_dynamic_key_info(struct iwl_priv *priv,
 582                                 struct ieee80211_key_conf *keyconf,
 583                                 u8 sta_id)
 584 {
 585         unsigned long flags;
 586         __le16 key_flags = 0;
 587         int ret;
 588
 589         keyconf->flags &= ~IEEE80211_KEY_FLAG_GENERATE_IV;
 590
 591         key_flags |= (STA_KEY_FLG_WEP | STA_KEY_FLG_MAP_KEY_MSK);
 592         key_flags |= cpu_to_le16(keyconf->keyidx << STA_KEY_FLG_KEYID_POS);
 593         key_flags &= ~STA_KEY_FLG_INVALID;
 594
 595         if (keyconf->keylen == WEP_KEY_LEN_128)
 596                 key_flags |= STA_KEY_FLG_KEY_SIZE_MSK;
 597
 598         if (sta_id == priv->hw_params.bcast_sta_id)
 599                 key_flags |= STA_KEY_MULTICAST_MSK;
 600
 601         spin_lock_irqsave(&priv->sta_lock, flags);
 602
 603         priv->stations[sta_id].keyinfo.alg = keyconf->alg;
 604         priv->stations[sta_id].keyinfo.keylen = keyconf->keylen;
 605         priv->stations[sta_id].keyinfo.keyidx = keyconf->keyidx;
 606
 607         memcpy(priv->stations[sta_id].keyinfo.key,
 608                                 keyconf->key, keyconf->keylen);
 609
 610         memcpy(&priv->stations[sta_id].sta.key.key[3],
 611                                 keyconf->key, keyconf->keylen);
 612
 613         if ((priv->stations[sta_id].sta.key.key_flags & STA_KEY_FLG_ENCRYPT_MSK)
 614                         == STA_KEY_FLG_NO_ENC)
 615                 priv->stations[sta_id].sta.key.key_offset =
 616                                  iwl_get_free_ucode_key_index(priv);
 617         /* else, we are overriding an existing key => no need to allocated room
 618          * in uCode. */
 619
 620         priv->stations[sta_id].sta.key.key_flags = key_flags;
 621         priv->stations[sta_id].sta.sta.modify_mask = STA_MODIFY_KEY_MASK;
 622         priv->stations[sta_id].sta.mode = STA_CONTROL_MODIFY_MSK;
 623
 624         ret = iwl_send_add_sta(priv, &priv->stations[sta_id].sta, CMD_ASYNC);
 625
 626         spin_unlock_irqrestore(&priv->sta_lock, flags);
 627
 628         return ret;
 629 }
 630
 631 static int iwl_set_ccmp_dynamic_key_info(struct iwl_priv *priv,
 632                                    struct ieee80211_key_conf *keyconf,
 633                                    u8 sta_id)
 634 {
 635         unsigned long flags;
 636         __le16 key_flags = 0;
 637
 638         key_flags |= (STA_KEY_FLG_CCMP | STA_KEY_FLG_MAP_KEY_MSK);
 639         key_flags |= cpu_to_le16(keyconf->keyidx << STA_KEY_FLG_KEYID_POS);
 640         key_flags &= ~STA_KEY_FLG_INVALID;
 641
 642         if (sta_id == priv->hw_params.bcast_sta_id)
 643                 key_flags |= STA_KEY_MULTICAST_MSK;
 644
 645         keyconf->flags |= IEEE80211_KEY_FLAG_GENERATE_IV;
 646
 647         spin_lock_irqsave(&priv->sta_lock, flags);
 648         priv->stations[sta_id].keyinfo.alg = keyconf->alg;
 649         priv->stations[sta_id].keyinfo.keylen = keyconf->keylen;
 650
 651         memcpy(priv->stations[sta_id].keyinfo.key, keyconf->key,
 652                keyconf->keylen);
 653
 654         memcpy(priv->stations[sta_id].sta.key.key, keyconf->key,
 655                keyconf->keylen);
 656
 657         if ((priv->stations[sta_id].sta.key.key_flags & STA_KEY_FLG_ENCRYPT_MSK)
 658                         == STA_KEY_FLG_NO_ENC)
 659                 priv->stations[sta_id].sta.key.key_offset =
 660                                  iwl_get_free_ucode_key_index(priv);
 661         /* else, we are overriding an existing key => no need to allocated room
 662          * in uCode. */
 663
 664         priv->stations[sta_id].sta.key.key_flags = key_flags;
 665         priv->stations[sta_id].sta.sta.modify_mask = STA_MODIFY_KEY_MASK;
 666         priv->stations[sta_id].sta.mode = STA_CONTROL_MODIFY_MSK;
 667
 668         spin_unlock_irqrestore(&priv->sta_lock, flags);
 669
 670         IWL_DEBUG_INFO("hwcrypto: modify ucode station key info\n");
 671         return iwl_send_add_sta(priv, &priv->stations[sta_id].sta, CMD_ASYNC);
 672 }
 673
 674 static int iwl_set_tkip_dynamic_key_info(struct iwl_priv *priv,
 675                                    struct ieee80211_key_conf *keyconf,
 676                                    u8 sta_id)
 677 {
 678         unsigned long flags;
 679         int ret = 0;
 680
 681         keyconf->flags |= IEEE80211_KEY_FLAG_GENERATE_IV;
 682         keyconf->flags |= IEEE80211_KEY_FLAG_GENERATE_MMIC;
 683
 684         spin_lock_irqsave(&priv->sta_lock, flags);
 685
 686         priv->stations[sta_id].keyinfo.alg = keyconf->alg;
 687         priv->stations[sta_id].keyinfo.keylen = 16;
 688
 689         if ((priv->stations[sta_id].sta.key.key_flags & STA_KEY_FLG_ENCRYPT_MSK)
 690                         == STA_KEY_FLG_NO_ENC)
 691                 priv->stations[sta_id].sta.key.key_offset =
 692                                  iwl_get_free_ucode_key_index(priv);
 693         /* else, we are overriding an existing key => no need to allocated room
 694          * in uCode. */
 695
 696         /* This copy is acutally not needed: we get the key with each TX */
 697         memcpy(priv->stations[sta_id].keyinfo.key, keyconf->key, 16);
 698
 699         memcpy(priv->stations[sta_id].sta.key.key, keyconf->key, 16);
 700
 701         spin_unlock_irqrestore(&priv->sta_lock, flags);
 702
 703         return ret;
 704 }
 705
 706 int iwl_remove_dynamic_key(struct iwl_priv *priv,
 707                                 struct ieee80211_key_conf *keyconf,
 708                                 u8 sta_id)
 709 {
 710         unsigned long flags;
 711         int ret = 0;
 712         u16 key_flags;
 713         u8 keyidx;
 714
 715         priv->key_mapping_key--;
 716
 717         spin_lock_irqsave(&priv->sta_lock, flags);
 718         key_flags = le16_to_cpu(priv->stations[sta_id].sta.key.key_flags);
 719         keyidx = (key_flags >> STA_KEY_FLG_KEYID_POS) & 0x3;
 720
 721         IWL_DEBUG_WEP("Remove dynamic key: idx=%d sta=%d\n",
 722                       keyconf->keyidx, sta_id);
 723
 724         if (keyconf->keyidx != keyidx) {
 725                 /* We need to remove a key with index different that the one
 726                  * in the uCode. This means that the key we need to remove has
 727                  * been replaced by another one with different index.
 728                  * Don't do anything and return ok
 729                  */
 730                 spin_unlock_irqrestore(&priv->sta_lock, flags);
 731                 return 0;
 732         }
 733
 734         if (!test_and_clear_bit(priv->stations[sta_id].sta.key.key_offset,
 735                 &priv->ucode_key_table))
 736                 IWL_ERROR("index %d not used in uCode key table.\n",
 737                         priv->stations[sta_id].sta.key.key_offset);
 738         memset(&priv->stations[sta_id].keyinfo, 0,
 739                                         sizeof(struct iwl_hw_key));
 740         memset(&priv->stations[sta_id].sta.key, 0,
 741                                         sizeof(struct iwl4965_keyinfo));
 742         priv->stations[sta_id].sta.key.key_flags =
 743                         STA_KEY_FLG_NO_ENC | STA_KEY_FLG_INVALID;
 744         priv->stations[sta_id].sta.key.key_offset = WEP_INVALID_OFFSET;
 745         priv->stations[sta_id].sta.sta.modify_mask = STA_MODIFY_KEY_MASK;
 746         priv->stations[sta_id].sta.mode = STA_CONTROL_MODIFY_MSK;
 747
 748         ret =  iwl_send_add_sta(priv, &priv->stations[sta_id].sta, CMD_ASYNC);
 749         spin_unlock_irqrestore(&priv->sta_lock, flags);
 750         return ret;
 751 }
 752 EXPORT_SYMBOL(iwl_remove_dynamic_key);
 753
 754 int iwl_set_dynamic_key(struct iwl_priv *priv,
 755                                 struct ieee80211_key_conf *keyconf, u8 sta_id)
 756 {
 757         int ret;
 758
 759         priv->key_mapping_key++;
 760         keyconf->hw_key_idx = HW_KEY_DYNAMIC;
 761
 762         switch (keyconf->alg) {
 763         case ALG_CCMP:
 764                 ret = iwl_set_ccmp_dynamic_key_info(priv, keyconf, sta_id);
 765                 break;
 766         case ALG_TKIP:
 767                 ret = iwl_set_tkip_dynamic_key_info(priv, keyconf, sta_id);
 768                 break;
 769         case ALG_WEP:
 770                 ret = iwl_set_wep_dynamic_key_info(priv, keyconf, sta_id);
 771                 break;
 772         default:
 773                 IWL_ERROR("Unknown alg: %s alg = %d\n", __func__, keyconf->alg);
 774                 ret = -EINVAL;
 775         }
 776
 777         IWL_DEBUG_WEP("Set dynamic key: alg= %d len=%d idx=%d sta=%d ret=%d\n",
 778                       keyconf->alg, keyconf->keylen, keyconf->keyidx,
 779                       sta_id, ret);
 780
 781         return ret;
 782 }
 783 EXPORT_SYMBOL(iwl_set_dynamic_key);
 784
 785 #ifdef CONFIG_IWLWIFI_DEBUG
 786 static void iwl_dump_lq_cmd(struct iwl_priv *priv,
 787                            struct iwl_link_quality_cmd *lq)
 788 {
 789         int i;
 790         IWL_DEBUG_RATE("lq station id 0x%x\n", lq->sta_id);
 791         IWL_DEBUG_RATE("lq dta 0x%X 0x%X\n",
 792                        lq->general_params.single_stream_ant_msk,
 793                        lq->general_params.dual_stream_ant_msk);
 794
 795         for (i = 0; i < LINK_QUAL_MAX_RETRY_NUM; i++)
 796                 IWL_DEBUG_RATE("lq index %d 0x%X\n",
 797                                i, lq->rs_table[i].rate_n_flags);
 798 }
 799 #else
 800 static inline void iwl_dump_lq_cmd(struct iwl_priv *priv,
 801                                    struct iwl_link_quality_cmd *lq)
 802 {
 803 }
 804 #endif
 805
 806 int iwl_send_lq_cmd(struct iwl_priv *priv,
 807                     struct iwl_link_quality_cmd *lq, u8 flags)
 808 {
 809         struct iwl_host_cmd cmd = {
 810                 .id = REPLY_TX_LINK_QUALITY_CMD,
 811                 .len = sizeof(struct iwl_link_quality_cmd),
 812                 .meta.flags = flags,
 813                 .data = lq,
 814         };
 815
 816         if ((lq->sta_id == 0xFF) &&
 817             (priv->iw_mode == NL80211_IFTYPE_ADHOC))
 818                 return -EINVAL;
 819
 820         if (lq->sta_id == 0xFF)
 821                 lq->sta_id = IWL_AP_ID;
 822
 823         iwl_dump_lq_cmd(priv, lq);
 824
 825         if (iwl_is_associated(priv) && priv->assoc_station_added)
 826                 return  iwl_send_cmd(priv, &cmd);
 827
 828         return 0;
 829 }
 830 EXPORT_SYMBOL(iwl_send_lq_cmd);
 831
 832 /**
 833  * iwl_sta_init_lq - Initialize a station's hardware rate table
 834  *
 835  * The uCode's station table contains a table of fallback rates
 836  * for automatic fallback during transmission.
 837  *
 838  * NOTE: This sets up a default set of values.  These will be replaced later
 839  *       if the driver's iwl-agn-rs rate scaling algorithm is used, instead of
 840  *       rc80211_simple.
 841  *
 842  * NOTE: Run REPLY_ADD_STA command to set up station table entry, before
 843  *       calling this function (which runs REPLY_TX_LINK_QUALITY_CMD,
 844  *       which requires station table entry to exist).
 845  */
 846 static void iwl_sta_init_lq(struct iwl_priv *priv, const u8 *addr, int is_ap)
 847 {
 848         int i, r;
 849         struct iwl_link_quality_cmd link_cmd = {
 850                 .reserved1 = 0,
 851         };
 852         u32 rate_flags;
 853
 854         /* Set up the rate scaling to start at selected rate, fall back
 855          * all the way down to 1M in IEEE order, and then spin on 1M */
 856         if (is_ap)
 857                 r = IWL_RATE_54M_INDEX;
 858         else if (priv->band == IEEE80211_BAND_5GHZ)
 859                 r = IWL_RATE_6M_INDEX;
 860         else
 861                 r = IWL_RATE_1M_INDEX;
 862
 863         for (i = 0; i < LINK_QUAL_MAX_RETRY_NUM; i++) {
 864                 rate_flags = 0;
 865                 if (r >= IWL_FIRST_CCK_RATE && r <= IWL_LAST_CCK_RATE)
 866                         rate_flags |= RATE_MCS_CCK_MSK;
 867
 868                 rate_flags |= first_antenna(priv->hw_params.valid_tx_ant) <<
 869                                 RATE_MCS_ANT_POS;
 870
 871                 link_cmd.rs_table[i].rate_n_flags =
 872                         iwl_hw_set_rate_n_flags(iwl_rates[r].plcp, rate_flags);
 873                 r = iwl4965_get_prev_ieee_rate(r);
 874         }
 875
 876         link_cmd.general_params.single_stream_ant_msk =
 877                                 first_antenna(priv->hw_params.valid_tx_ant);
 878         link_cmd.general_params.dual_stream_ant_msk = 3;
 879         link_cmd.agg_params.agg_dis_start_th = 3;
 880         link_cmd.agg_params.agg_time_limit = cpu_to_le16(4000);
 881
 882         /* Update the rate scaling for control frame Tx to AP */
 883         link_cmd.sta_id = is_ap ? IWL_AP_ID : priv->hw_params.bcast_sta_id;
 884
 885         iwl_send_cmd_pdu_async(priv, REPLY_TX_LINK_QUALITY_CMD,
 886                                sizeof(link_cmd), &link_cmd, NULL);
 887 }
 888
 889 /**
 890  * iwl_rxon_add_station - add station into station table.
 891  *
 892  * there is only one AP station with id= IWL_AP_ID
 893  * NOTE: mutex must be held before calling this fnction
 894  */
 895 int iwl_rxon_add_station(struct iwl_priv *priv, const u8 *addr, int is_ap)
 896 {
 897         struct ieee80211_sta *sta;
 898         struct ieee80211_sta_ht_cap ht_config;
 899         struct ieee80211_sta_ht_cap *cur_ht_config = NULL;
 900         u8 sta_id;
 901
 902         /* Add station to device's station table */
 903
 904         /*
 905          * XXX: This check is definitely not correct, if we're an AP
 906          *      it'll always be false which is not what we want, but
 907          *      it doesn't look like iwlagn is prepared to be an HT
 908          *      AP anyway.
 909          */
 910         if (priv->current_ht_config.is_ht) {
 911                 rcu_read_lock();
 912                 sta = ieee80211_find_sta(priv->hw, addr);
 913                 if (sta) {
 914                         memcpy(&ht_config, &sta->ht_cap, sizeof(ht_config));
 915                         cur_ht_config = &ht_config;
 916                 }
 917                 rcu_read_unlock();
 918         }
 919
 920         sta_id = iwl_add_station_flags(priv, addr, is_ap,
 921                                        0, cur_ht_config);
 922
 923         /* Set up default rate scaling table in device's station table */
 924         iwl_sta_init_lq(priv, addr, is_ap);
 925
 926         return sta_id;
 927 }
 928 EXPORT_SYMBOL(iwl_rxon_add_station);
 929
 930 /**
 931  * iwl_get_sta_id - Find station's index within station table
 932  *
 933  * If new IBSS station, create new entry in station table
 934  */
 935 int iwl_get_sta_id(struct iwl_priv *priv, struct ieee80211_hdr *hdr)
 936 {
 937         int sta_id;
 938         u16 fc = le16_to_cpu(hdr->frame_control);
 939
 940         /* If this frame is broadcast or management, use broadcast station id */
 941         if (((fc & IEEE80211_FCTL_FTYPE) != IEEE80211_FTYPE_DATA) ||
 942             is_multicast_ether_addr(hdr->addr1))
 943                 return priv->hw_params.bcast_sta_id;
 944
 945         switch (priv->iw_mode) {
 946
 947         /* If we are a client station in a BSS network, use the special
 948          * AP station entry (that's the only station we communicate with) */
 949         case NL80211_IFTYPE_STATION:
 950                 return IWL_AP_ID;
 951
 952         /* If we are an AP, then find the station, or use BCAST */
 953         case NL80211_IFTYPE_AP:
 954                 sta_id = iwl_find_station(priv, hdr->addr1);
 955                 if (sta_id != IWL_INVALID_STATION)
 956                         return sta_id;
 957                 return priv->hw_params.bcast_sta_id;
 958
 959         /* If this frame is going out to an IBSS network, find the station,
 960          * or create a new station table entry */
 961         case NL80211_IFTYPE_ADHOC:
 962                 sta_id = iwl_find_station(priv, hdr->addr1);
 963                 if (sta_id != IWL_INVALID_STATION)
 964                         return sta_id;
 965
 966                 /* Create new station table entry */
 967                 sta_id = iwl_add_station_flags(priv, hdr->addr1,
 968                                                    0, CMD_ASYNC, NULL);
 969
 970                 if (sta_id != IWL_INVALID_STATION)
 971                         return sta_id;
 972
 973                 IWL_DEBUG_DROP("Station %pM not in station map. "
 974                                "Defaulting to broadcast...\n",
 975                                hdr->addr1);
 976                 iwl_print_hex_dump(priv, IWL_DL_DROP, (u8 *) hdr, sizeof(*hdr));
 977                 return priv->hw_params.bcast_sta_id;
 978
 979         /* If we are in monitor mode, use BCAST. This is required for
 980          * packet injection. */
 981         case NL80211_IFTYPE_MONITOR:
 982                 return priv->hw_params.bcast_sta_id;
 983
 984         default:
 985                 IWL_WARNING("Unknown mode of operation: %d\n", priv->iw_mode);
 986                 return priv->hw_params.bcast_sta_id;
 987         }
 988 }
 989 EXPORT_SYMBOL(iwl_get_sta_id);
 990
 991 /**
 992  * iwl_sta_modify_enable_tid_tx - Enable Tx for this TID in station table
 993  */
 994 void iwl_sta_modify_enable_tid_tx(struct iwl_priv *priv, int sta_id, int tid)
 995 {
 996         unsigned long flags;
 997
 998         /* Remove "disable" flag, to enable Tx for this TID */
 999         spin_lock_irqsave(&priv->sta_lock, flags);
1000         priv->stations[sta_id].sta.sta.modify_mask = STA_MODIFY_TID_DISABLE_TX;
1001         priv->stations[sta_id].sta.tid_disable_tx &= cpu_to_le16(~(1 << tid));
1002         priv->stations[sta_id].sta.mode = STA_CONTROL_MODIFY_MSK;
1003         spin_unlock_irqrestore(&priv->sta_lock, flags);
1004
1005         iwl_send_add_sta(priv, &priv->stations[sta_id].sta, CMD_ASYNC);
1006 }
1007 EXPORT_SYMBOL(iwl_sta_modify_enable_tid_tx);
1008