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         u8 sta_id = cmd->cmd.addsta.sta.sta_id;
 106
 107         if (!skb) {
 108                 IWL_ERROR("Error: Response NULL in REPLY_ADD_STA.\n");
 109                 return 1;
 110         }
 111
 112         res = (struct iwl_rx_packet *)skb->data;
 113         if (res->hdr.flags & IWL_CMD_FAILED_MSK) {
 114                 IWL_ERROR("Bad return from REPLY_ADD_STA (0x%08X)\n",
 115                           res->hdr.flags);
 116                 return 1;
 117         }
 118
 119         switch (res->u.add_sta.status) {
 120         case ADD_STA_SUCCESS_MSK:
 121                 iwl_sta_ucode_activate(priv, sta_id);
 122                  /* fall through */
 123         default:
 124                 IWL_DEBUG_HC("Received REPLY_ADD_STA:(0x%08X)\n",
 125                              res->u.add_sta.status);
 126                 break;
 127         }
 128
 129         /* We didn't cache the SKB; let the caller free it */
 130         return 1;
 131 }
 132
 133 int iwl_send_add_sta(struct iwl_priv *priv,
 134                      struct iwl_addsta_cmd *sta, u8 flags)
 135 {
 136         struct iwl_rx_packet *res = NULL;
 137         int ret = 0;
 138         u8 data[sizeof(*sta)];
 139         struct iwl_host_cmd cmd = {
 140                 .id = REPLY_ADD_STA,
 141                 .meta.flags = flags,
 142                 .data = data,
 143         };
 144
 145         if (flags & CMD_ASYNC)
 146                 cmd.meta.u.callback = iwl_add_sta_callback;
 147         else
 148                 cmd.meta.flags |= CMD_WANT_SKB;
 149
 150         cmd.len = priv->cfg->ops->utils->build_addsta_hcmd(sta, data);
 151         ret = iwl_send_cmd(priv, &cmd);
 152
 153         if (ret || (flags & CMD_ASYNC))
 154                 return ret;
 155
 156         res = (struct iwl_rx_packet *)cmd.meta.u.skb->data;
 157         if (res->hdr.flags & IWL_CMD_FAILED_MSK) {
 158                 IWL_ERROR("Bad return from REPLY_ADD_STA (0x%08X)\n",
 159                           res->hdr.flags);
 160                 ret = -EIO;
 161         }
 162
 163         if (ret == 0) {
 164                 switch (res->u.add_sta.status) {
 165                 case ADD_STA_SUCCESS_MSK:
 166                         iwl_sta_ucode_activate(priv, sta->sta.sta_id);
 167                         IWL_DEBUG_INFO("REPLY_ADD_STA PASSED\n");
 168                         break;
 169                 default:
 170                         ret = -EIO;
 171                         IWL_WARNING("REPLY_ADD_STA failed\n");
 172                         break;
 173                 }
 174         }
 175
 176         priv->alloc_rxb_skb--;
 177         dev_kfree_skb_any(cmd.meta.u.skb);
 178
 179         return ret;
 180 }
 181 EXPORT_SYMBOL(iwl_send_add_sta);
 182
 183 static void iwl_set_ht_add_station(struct iwl_priv *priv, u8 index,
 184                                    struct ieee80211_sta_ht_cap *sta_ht_inf)
 185 {
 186         __le32 sta_flags;
 187         u8 mimo_ps_mode;
 188
 189         if (!sta_ht_inf || !sta_ht_inf->ht_supported)
 190                 goto done;
 191
 192         mimo_ps_mode = (sta_ht_inf->cap & IEEE80211_HT_CAP_SM_PS) >> 2;
 193
 194         sta_flags = priv->stations[index].sta.station_flags;
 195
 196         sta_flags &= ~(STA_FLG_RTS_MIMO_PROT_MSK | STA_FLG_MIMO_DIS_MSK);
 197
 198         switch (mimo_ps_mode) {
 199         case WLAN_HT_CAP_SM_PS_STATIC:
 200                 sta_flags |= STA_FLG_MIMO_DIS_MSK;
 201                 break;
 202         case WLAN_HT_CAP_SM_PS_DYNAMIC:
 203                 sta_flags |= STA_FLG_RTS_MIMO_PROT_MSK;
 204                 break;
 205         case WLAN_HT_CAP_SM_PS_DISABLED:
 206                 break;
 207         default:
 208                 IWL_WARNING("Invalid MIMO PS mode %d\n", mimo_ps_mode);
 209                 break;
 210         }
 211
 212         sta_flags |= cpu_to_le32(
 213               (u32)sta_ht_inf->ampdu_factor << STA_FLG_MAX_AGG_SIZE_POS);
 214
 215         sta_flags |= cpu_to_le32(
 216               (u32)sta_ht_inf->ampdu_density << STA_FLG_AGG_MPDU_DENSITY_POS);
 217
 218         if (iwl_is_fat_tx_allowed(priv, sta_ht_inf))
 219                 sta_flags |= STA_FLG_FAT_EN_MSK;
 220         else
 221                 sta_flags &= ~STA_FLG_FAT_EN_MSK;
 222
 223         priv->stations[index].sta.station_flags = sta_flags;
 224  done:
 225         return;
 226 }
 227
 228 /**
 229  * iwl_add_station_flags - Add station to tables in driver and device
 230  */
 231 u8 iwl_add_station_flags(struct iwl_priv *priv, const u8 *addr, int is_ap,
 232                          u8 flags, struct ieee80211_sta_ht_cap *ht_info)
 233 {
 234         int i;
 235         int sta_id = IWL_INVALID_STATION;
 236         struct iwl_station_entry *station;
 237         unsigned long flags_spin;
 238
 239         spin_lock_irqsave(&priv->sta_lock, flags_spin);
 240         if (is_ap)
 241                 sta_id = IWL_AP_ID;
 242         else if (is_broadcast_ether_addr(addr))
 243                 sta_id = priv->hw_params.bcast_sta_id;
 244         else
 245                 for (i = IWL_STA_ID; i < priv->hw_params.max_stations; i++) {
 246                         if (!compare_ether_addr(priv->stations[i].sta.sta.addr,
 247                                                 addr)) {
 248                                 sta_id = i;
 249                                 break;
 250                         }
 251
 252                         if (!priv->stations[i].used &&
 253                             sta_id == IWL_INVALID_STATION)
 254                                 sta_id = i;
 255                 }
 256
 257         /* These two conditions have the same outcome, but keep them separate
 258            since they have different meanings */
 259         if (unlikely(sta_id == IWL_INVALID_STATION)) {
 260                 spin_unlock_irqrestore(&priv->sta_lock, flags_spin);
 261                 return sta_id;
 262         }
 263
 264         if (priv->stations[sta_id].used &&
 265             !compare_ether_addr(priv->stations[sta_id].sta.sta.addr, addr)) {
 266                 spin_unlock_irqrestore(&priv->sta_lock, flags_spin);
 267                 return sta_id;
 268         }
 269
 270
 271         station = &priv->stations[sta_id];
 272         station->used = IWL_STA_DRIVER_ACTIVE;
 273         IWL_DEBUG_ASSOC("Add STA to driver ID %d: %pM\n",
 274                         sta_id, addr);
 275         priv->num_stations++;
 276
 277         /* Set up the REPLY_ADD_STA command to send to device */
 278         memset(&station->sta, 0, sizeof(struct iwl_addsta_cmd));
 279         memcpy(station->sta.sta.addr, addr, ETH_ALEN);
 280         station->sta.mode = 0;
 281         station->sta.sta.sta_id = sta_id;
 282         station->sta.station_flags = 0;
 283
 284         /* BCAST station and IBSS stations do not work in HT mode */
 285         if (sta_id != priv->hw_params.bcast_sta_id &&
 286             priv->iw_mode != NL80211_IFTYPE_ADHOC)
 287                 iwl_set_ht_add_station(priv, sta_id, ht_info);
 288
 289         spin_unlock_irqrestore(&priv->sta_lock, flags_spin);
 290
 291         /* Add station to device's station table */
 292         iwl_send_add_sta(priv, &station->sta, flags);
 293         return sta_id;
 294
 295 }
 296 EXPORT_SYMBOL(iwl_add_station_flags);
 297
 298 static void iwl_sta_ucode_deactivate(struct iwl_priv *priv, const char *addr)
 299 {
 300         unsigned long flags;
 301         u8 sta_id = iwl_find_station(priv, addr);
 302
 303         BUG_ON(sta_id == IWL_INVALID_STATION);
 304
 305         IWL_DEBUG_ASSOC("Removed STA from Ucode: %pM\n", addr);
 306
 307         spin_lock_irqsave(&priv->sta_lock, flags);
 308
 309         /* Ucode must be active and driver must be non active */
 310         if (priv->stations[sta_id].used != IWL_STA_UCODE_ACTIVE)
 311                 IWL_ERROR("removed non active STA %d\n", sta_id);
 312
 313         priv->stations[sta_id].used &= ~IWL_STA_UCODE_ACTIVE;
 314
 315         memset(&priv->stations[sta_id], 0, sizeof(struct iwl_station_entry));
 316         spin_unlock_irqrestore(&priv->sta_lock, flags);
 317 }
 318
 319 static int iwl_remove_sta_callback(struct iwl_priv *priv,
 320                                    struct iwl_cmd *cmd, struct sk_buff *skb)
 321 {
 322         struct iwl_rx_packet *res = NULL;
 323         const char *addr = cmd->cmd.rm_sta.addr;
 324
 325         if (!skb) {
 326                 IWL_ERROR("Error: Response NULL in REPLY_REMOVE_STA.\n");
 327                 return 1;
 328         }
 329
 330         res = (struct iwl_rx_packet *)skb->data;
 331         if (res->hdr.flags & IWL_CMD_FAILED_MSK) {
 332                 IWL_ERROR("Bad return from REPLY_REMOVE_STA (0x%08X)\n",
 333                 res->hdr.flags);
 334                 return 1;
 335         }
 336
 337         switch (res->u.rem_sta.status) {
 338         case REM_STA_SUCCESS_MSK:
 339                 iwl_sta_ucode_deactivate(priv, addr);
 340                 break;
 341         default:
 342                 IWL_ERROR("REPLY_REMOVE_STA failed\n");
 343                 break;
 344         }
 345
 346         /* We didn't cache the SKB; let the caller free it */
 347         return 1;
 348 }
 349
 350 static int iwl_send_remove_station(struct iwl_priv *priv, const u8 *addr,
 351                                    u8 flags)
 352 {
 353         struct iwl_rx_packet *res = NULL;
 354         int ret;
 355
 356         struct iwl_rem_sta_cmd rm_sta_cmd;
 357
 358         struct iwl_host_cmd cmd = {
 359                 .id = REPLY_REMOVE_STA,
 360                 .len = sizeof(struct iwl_rem_sta_cmd),
 361                 .meta.flags = flags,
 362                 .data = &rm_sta_cmd,
 363         };
 364
 365         memset(&rm_sta_cmd, 0, sizeof(rm_sta_cmd));
 366         rm_sta_cmd.num_sta = 1;
 367         memcpy(&rm_sta_cmd.addr, addr , ETH_ALEN);
 368
 369         if (flags & CMD_ASYNC)
 370                 cmd.meta.u.callback = iwl_remove_sta_callback;
 371         else
 372                 cmd.meta.flags |= CMD_WANT_SKB;
 373         ret = iwl_send_cmd(priv, &cmd);
 374
 375         if (ret || (flags & CMD_ASYNC))
 376                 return ret;
 377
 378         res = (struct iwl_rx_packet *)cmd.meta.u.skb->data;
 379         if (res->hdr.flags & IWL_CMD_FAILED_MSK) {
 380                 IWL_ERROR("Bad return from REPLY_REMOVE_STA (0x%08X)\n",
 381                           res->hdr.flags);
 382                 ret = -EIO;
 383         }
 384
 385         if (!ret) {
 386                 switch (res->u.rem_sta.status) {
 387                 case REM_STA_SUCCESS_MSK:
 388                         iwl_sta_ucode_deactivate(priv, addr);
 389                         IWL_DEBUG_ASSOC("REPLY_REMOVE_STA PASSED\n");
 390                         break;
 391                 default:
 392                         ret = -EIO;
 393                         IWL_ERROR("REPLY_REMOVE_STA failed\n");
 394                         break;
 395                 }
 396         }
 397
 398         priv->alloc_rxb_skb--;
 399         dev_kfree_skb_any(cmd.meta.u.skb);
 400
 401         return ret;
 402 }
 403
 404 /**
 405  * iwl_remove_station - Remove driver's knowledge of station.
 406  */
 407 int iwl_remove_station(struct iwl_priv *priv, const u8 *addr, int is_ap)
 408 {
 409         int sta_id = IWL_INVALID_STATION;
 410         int i, ret = -EINVAL;
 411         unsigned long flags;
 412
 413         spin_lock_irqsave(&priv->sta_lock, flags);
 414
 415         if (is_ap)
 416                 sta_id = IWL_AP_ID;
 417         else if (is_broadcast_ether_addr(addr))
 418                 sta_id = priv->hw_params.bcast_sta_id;
 419         else
 420                 for (i = IWL_STA_ID; i < priv->hw_params.max_stations; i++)
 421                         if (priv->stations[i].used &&
 422                             !compare_ether_addr(priv->stations[i].sta.sta.addr,
 423                                                 addr)) {
 424                                 sta_id = i;
 425                                 break;
 426                         }
 427
 428         if (unlikely(sta_id == IWL_INVALID_STATION))
 429                 goto out;
 430
 431         IWL_DEBUG_ASSOC("Removing STA from driver:%d  %pM\n",
 432                 sta_id, addr);
 433
 434         if (!(priv->stations[sta_id].used & IWL_STA_DRIVER_ACTIVE)) {
 435                 IWL_ERROR("Removing %pM but non DRIVER active\n",
 436                                 addr);
 437                 goto out;
 438         }
 439
 440         if (!(priv->stations[sta_id].used & IWL_STA_UCODE_ACTIVE)) {
 441                 IWL_ERROR("Removing %pM but non UCODE active\n",
 442                                 addr);
 443                 goto out;
 444         }
 445
 446
 447         priv->stations[sta_id].used &= ~IWL_STA_DRIVER_ACTIVE;
 448
 449         priv->num_stations--;
 450
 451         BUG_ON(priv->num_stations < 0);
 452
 453         spin_unlock_irqrestore(&priv->sta_lock, flags);
 454
 455         ret = iwl_send_remove_station(priv, addr, CMD_ASYNC);
 456         return ret;
 457 out:
 458         spin_unlock_irqrestore(&priv->sta_lock, flags);
 459         return ret;
 460 }
 461 EXPORT_SYMBOL(iwl_remove_station);
 462
 463 static int iwl_get_free_ucode_key_index(struct iwl_priv *priv)
 464 {
 465         int i;
 466
 467         for (i = 0; i < STA_KEY_MAX_NUM; i++)
 468                 if (!test_and_set_bit(i, &priv->ucode_key_table))
 469                         return i;
 470
 471         return -1;
 472 }
 473
 474 int iwl_send_static_wepkey_cmd(struct iwl_priv *priv, u8 send_if_empty)
 475 {
 476         int i, not_empty = 0;
 477         u8 buff[sizeof(struct iwl_wep_cmd) +
 478                 sizeof(struct iwl_wep_key) * WEP_KEYS_MAX];
 479         struct iwl_wep_cmd *wep_cmd = (struct iwl_wep_cmd *)buff;
 480         size_t cmd_size  = sizeof(struct iwl_wep_cmd);
 481         struct iwl_host_cmd cmd = {
 482                 .id = REPLY_WEPKEY,
 483                 .data = wep_cmd,
 484                 .meta.flags = CMD_ASYNC,
 485         };
 486
 487         memset(wep_cmd, 0, cmd_size +
 488                         (sizeof(struct iwl_wep_key) * WEP_KEYS_MAX));
 489
 490         for (i = 0; i < WEP_KEYS_MAX ; i++) {
 491                 wep_cmd->key[i].key_index = i;
 492                 if (priv->wep_keys[i].key_size) {
 493                         wep_cmd->key[i].key_offset = i;
 494                         not_empty = 1;
 495                 } else {
 496                         wep_cmd->key[i].key_offset = WEP_INVALID_OFFSET;
 497                 }
 498
 499                 wep_cmd->key[i].key_size = priv->wep_keys[i].key_size;
 500                 memcpy(&wep_cmd->key[i].key[3], priv->wep_keys[i].key,
 501                                 priv->wep_keys[i].key_size);
 502         }
 503
 504         wep_cmd->global_key_type = WEP_KEY_WEP_TYPE;
 505         wep_cmd->num_keys = WEP_KEYS_MAX;
 506
 507         cmd_size += sizeof(struct iwl_wep_key) * WEP_KEYS_MAX;
 508
 509         cmd.len = cmd_size;
 510
 511         if (not_empty || send_if_empty)
 512                 return iwl_send_cmd(priv, &cmd);
 513         else
 514                 return 0;
 515 }
 516 EXPORT_SYMBOL(iwl_send_static_wepkey_cmd);
 517
 518 int iwl_remove_default_wep_key(struct iwl_priv *priv,
 519                                struct ieee80211_key_conf *keyconf)
 520 {
 521         int ret;
 522         unsigned long flags;
 523
 524         spin_lock_irqsave(&priv->sta_lock, flags);
 525
 526         if (!test_and_clear_bit(keyconf->keyidx, &priv->ucode_key_table))
 527                 IWL_ERROR("index %d not used in uCode key table.\n",
 528                           keyconf->keyidx);
 529
 530         priv->default_wep_key--;
 531         memset(&priv->wep_keys[keyconf->keyidx], 0, sizeof(priv->wep_keys[0]));
 532         ret = iwl_send_static_wepkey_cmd(priv, 1);
 533         IWL_DEBUG_WEP("Remove default WEP key: idx=%d ret=%d\n",
 534                       keyconf->keyidx, ret);
 535         spin_unlock_irqrestore(&priv->sta_lock, flags);
 536
 537         return ret;
 538 }
 539 EXPORT_SYMBOL(iwl_remove_default_wep_key);
 540
 541 int iwl_set_default_wep_key(struct iwl_priv *priv,
 542                             struct ieee80211_key_conf *keyconf)
 543 {
 544         int ret;
 545         unsigned long flags;
 546
 547         if (keyconf->keylen != WEP_KEY_LEN_128 &&
 548             keyconf->keylen != WEP_KEY_LEN_64) {
 549                 IWL_DEBUG_WEP("Bad WEP key length %d\n", keyconf->keylen);
 550                 return -EINVAL;
 551         }
 552
 553         keyconf->flags &= ~IEEE80211_KEY_FLAG_GENERATE_IV;
 554         keyconf->hw_key_idx = HW_KEY_DEFAULT;
 555         priv->stations[IWL_AP_ID].keyinfo.alg = ALG_WEP;
 556
 557         spin_lock_irqsave(&priv->sta_lock, flags);
 558         priv->default_wep_key++;
 559
 560         if (test_and_set_bit(keyconf->keyidx, &priv->ucode_key_table))
 561                 IWL_ERROR("index %d already used in uCode key table.\n",
 562                         keyconf->keyidx);
 563
 564         priv->wep_keys[keyconf->keyidx].key_size = keyconf->keylen;
 565         memcpy(&priv->wep_keys[keyconf->keyidx].key, &keyconf->key,
 566                                                         keyconf->keylen);
 567
 568         ret = iwl_send_static_wepkey_cmd(priv, 0);
 569         IWL_DEBUG_WEP("Set default WEP key: len=%d idx=%d ret=%d\n",
 570                 keyconf->keylen, keyconf->keyidx, ret);
 571         spin_unlock_irqrestore(&priv->sta_lock, flags);
 572
 573         return ret;
 574 }
 575 EXPORT_SYMBOL(iwl_set_default_wep_key);
 576
 577 static int iwl_set_wep_dynamic_key_info(struct iwl_priv *priv,
 578                                 struct ieee80211_key_conf *keyconf,
 579                                 u8 sta_id)
 580 {
 581         unsigned long flags;
 582         __le16 key_flags = 0;
 583         int ret;
 584
 585         keyconf->flags &= ~IEEE80211_KEY_FLAG_GENERATE_IV;
 586
 587         key_flags |= (STA_KEY_FLG_WEP | STA_KEY_FLG_MAP_KEY_MSK);
 588         key_flags |= cpu_to_le16(keyconf->keyidx << STA_KEY_FLG_KEYID_POS);
 589         key_flags &= ~STA_KEY_FLG_INVALID;
 590
 591         if (keyconf->keylen == WEP_KEY_LEN_128)
 592                 key_flags |= STA_KEY_FLG_KEY_SIZE_MSK;
 593
 594         if (sta_id == priv->hw_params.bcast_sta_id)
 595                 key_flags |= STA_KEY_MULTICAST_MSK;
 596
 597         spin_lock_irqsave(&priv->sta_lock, flags);
 598
 599         priv->stations[sta_id].keyinfo.alg = keyconf->alg;
 600         priv->stations[sta_id].keyinfo.keylen = keyconf->keylen;
 601         priv->stations[sta_id].keyinfo.keyidx = keyconf->keyidx;
 602
 603         memcpy(priv->stations[sta_id].keyinfo.key,
 604                                 keyconf->key, keyconf->keylen);
 605
 606         memcpy(&priv->stations[sta_id].sta.key.key[3],
 607                                 keyconf->key, keyconf->keylen);
 608
 609         if ((priv->stations[sta_id].sta.key.key_flags & STA_KEY_FLG_ENCRYPT_MSK)
 610                         == STA_KEY_FLG_NO_ENC)
 611                 priv->stations[sta_id].sta.key.key_offset =
 612                                  iwl_get_free_ucode_key_index(priv);
 613         /* else, we are overriding an existing key => no need to allocated room
 614          * in uCode. */
 615
 616         priv->stations[sta_id].sta.key.key_flags = key_flags;
 617         priv->stations[sta_id].sta.sta.modify_mask = STA_MODIFY_KEY_MASK;
 618         priv->stations[sta_id].sta.mode = STA_CONTROL_MODIFY_MSK;
 619
 620         ret = iwl_send_add_sta(priv, &priv->stations[sta_id].sta, CMD_ASYNC);
 621
 622         spin_unlock_irqrestore(&priv->sta_lock, flags);
 623
 624         return ret;
 625 }
 626
 627 static int iwl_set_ccmp_dynamic_key_info(struct iwl_priv *priv,
 628                                    struct ieee80211_key_conf *keyconf,
 629                                    u8 sta_id)
 630 {
 631         unsigned long flags;
 632         __le16 key_flags = 0;
 633
 634         key_flags |= (STA_KEY_FLG_CCMP | STA_KEY_FLG_MAP_KEY_MSK);
 635         key_flags |= cpu_to_le16(keyconf->keyidx << STA_KEY_FLG_KEYID_POS);
 636         key_flags &= ~STA_KEY_FLG_INVALID;
 637
 638         if (sta_id == priv->hw_params.bcast_sta_id)
 639                 key_flags |= STA_KEY_MULTICAST_MSK;
 640
 641         keyconf->flags |= IEEE80211_KEY_FLAG_GENERATE_IV;
 642
 643         spin_lock_irqsave(&priv->sta_lock, flags);
 644         priv->stations[sta_id].keyinfo.alg = keyconf->alg;
 645         priv->stations[sta_id].keyinfo.keylen = keyconf->keylen;
 646
 647         memcpy(priv->stations[sta_id].keyinfo.key, keyconf->key,
 648                keyconf->keylen);
 649
 650         memcpy(priv->stations[sta_id].sta.key.key, keyconf->key,
 651                keyconf->keylen);
 652
 653         if ((priv->stations[sta_id].sta.key.key_flags & STA_KEY_FLG_ENCRYPT_MSK)
 654                         == STA_KEY_FLG_NO_ENC)
 655                 priv->stations[sta_id].sta.key.key_offset =
 656                                  iwl_get_free_ucode_key_index(priv);
 657         /* else, we are overriding an existing key => no need to allocated room
 658          * in uCode. */
 659
 660         priv->stations[sta_id].sta.key.key_flags = key_flags;
 661         priv->stations[sta_id].sta.sta.modify_mask = STA_MODIFY_KEY_MASK;
 662         priv->stations[sta_id].sta.mode = STA_CONTROL_MODIFY_MSK;
 663
 664         spin_unlock_irqrestore(&priv->sta_lock, flags);
 665
 666         IWL_DEBUG_INFO("hwcrypto: modify ucode station key info\n");
 667         return iwl_send_add_sta(priv, &priv->stations[sta_id].sta, CMD_ASYNC);
 668 }
 669
 670 static int iwl_set_tkip_dynamic_key_info(struct iwl_priv *priv,
 671                                    struct ieee80211_key_conf *keyconf,
 672                                    u8 sta_id)
 673 {
 674         unsigned long flags;
 675         int ret = 0;
 676
 677         keyconf->flags |= IEEE80211_KEY_FLAG_GENERATE_IV;
 678         keyconf->flags |= IEEE80211_KEY_FLAG_GENERATE_MMIC;
 679
 680         spin_lock_irqsave(&priv->sta_lock, flags);
 681
 682         priv->stations[sta_id].keyinfo.alg = keyconf->alg;
 683         priv->stations[sta_id].keyinfo.keylen = 16;
 684
 685         if ((priv->stations[sta_id].sta.key.key_flags & STA_KEY_FLG_ENCRYPT_MSK)
 686                         == STA_KEY_FLG_NO_ENC)
 687                 priv->stations[sta_id].sta.key.key_offset =
 688                                  iwl_get_free_ucode_key_index(priv);
 689         /* else, we are overriding an existing key => no need to allocated room
 690          * in uCode. */
 691
 692         /* This copy is acutally not needed: we get the key with each TX */
 693         memcpy(priv->stations[sta_id].keyinfo.key, keyconf->key, 16);
 694
 695         memcpy(priv->stations[sta_id].sta.key.key, keyconf->key, 16);
 696
 697         spin_unlock_irqrestore(&priv->sta_lock, flags);
 698
 699         return ret;
 700 }
 701
 702 int iwl_remove_dynamic_key(struct iwl_priv *priv,
 703                                 struct ieee80211_key_conf *keyconf,
 704                                 u8 sta_id)
 705 {
 706         unsigned long flags;
 707         int ret = 0;
 708         u16 key_flags;
 709         u8 keyidx;
 710
 711         priv->key_mapping_key--;
 712
 713         spin_lock_irqsave(&priv->sta_lock, flags);
 714         key_flags = le16_to_cpu(priv->stations[sta_id].sta.key.key_flags);
 715         keyidx = (key_flags >> STA_KEY_FLG_KEYID_POS) & 0x3;
 716
 717         IWL_DEBUG_WEP("Remove dynamic key: idx=%d sta=%d\n",
 718                       keyconf->keyidx, sta_id);
 719
 720         if (keyconf->keyidx != keyidx) {
 721                 /* We need to remove a key with index different that the one
 722                  * in the uCode. This means that the key we need to remove has
 723                  * been replaced by another one with different index.
 724                  * Don't do anything and return ok
 725                  */
 726                 spin_unlock_irqrestore(&priv->sta_lock, flags);
 727                 return 0;
 728         }
 729
 730         if (!test_and_clear_bit(priv->stations[sta_id].sta.key.key_offset,
 731                 &priv->ucode_key_table))
 732                 IWL_ERROR("index %d not used in uCode key table.\n",
 733                         priv->stations[sta_id].sta.key.key_offset);
 734         memset(&priv->stations[sta_id].keyinfo, 0,
 735                                         sizeof(struct iwl_hw_key));
 736         memset(&priv->stations[sta_id].sta.key, 0,
 737                                         sizeof(struct iwl4965_keyinfo));
 738         priv->stations[sta_id].sta.key.key_flags =
 739                         STA_KEY_FLG_NO_ENC | STA_KEY_FLG_INVALID;
 740         priv->stations[sta_id].sta.key.key_offset = WEP_INVALID_OFFSET;
 741         priv->stations[sta_id].sta.sta.modify_mask = STA_MODIFY_KEY_MASK;
 742         priv->stations[sta_id].sta.mode = STA_CONTROL_MODIFY_MSK;
 743
 744         ret =  iwl_send_add_sta(priv, &priv->stations[sta_id].sta, CMD_ASYNC);
 745         spin_unlock_irqrestore(&priv->sta_lock, flags);
 746         return ret;
 747 }
 748 EXPORT_SYMBOL(iwl_remove_dynamic_key);
 749
 750 int iwl_set_dynamic_key(struct iwl_priv *priv,
 751                                 struct ieee80211_key_conf *keyconf, u8 sta_id)
 752 {
 753         int ret;
 754
 755         priv->key_mapping_key++;
 756         keyconf->hw_key_idx = HW_KEY_DYNAMIC;
 757
 758         switch (keyconf->alg) {
 759         case ALG_CCMP:
 760                 ret = iwl_set_ccmp_dynamic_key_info(priv, keyconf, sta_id);
 761                 break;
 762         case ALG_TKIP:
 763                 ret = iwl_set_tkip_dynamic_key_info(priv, keyconf, sta_id);
 764                 break;
 765         case ALG_WEP:
 766                 ret = iwl_set_wep_dynamic_key_info(priv, keyconf, sta_id);
 767                 break;
 768         default:
 769                 IWL_ERROR("Unknown alg: %s alg = %d\n", __func__, keyconf->alg);
 770                 ret = -EINVAL;
 771         }
 772
 773         IWL_DEBUG_WEP("Set dynamic key: alg= %d len=%d idx=%d sta=%d ret=%d\n",
 774                       keyconf->alg, keyconf->keylen, keyconf->keyidx,
 775                       sta_id, ret);
 776
 777         return ret;
 778 }
 779 EXPORT_SYMBOL(iwl_set_dynamic_key);
 780
 781 #ifdef CONFIG_IWLWIFI_DEBUG
 782 static void iwl_dump_lq_cmd(struct iwl_priv *priv,
 783                            struct iwl_link_quality_cmd *lq)
 784 {
 785         int i;
 786         IWL_DEBUG_RATE("lq station id 0x%x\n", lq->sta_id);
 787         IWL_DEBUG_RATE("lq dta 0x%X 0x%X\n",
 788                        lq->general_params.single_stream_ant_msk,
 789                        lq->general_params.dual_stream_ant_msk);
 790
 791         for (i = 0; i < LINK_QUAL_MAX_RETRY_NUM; i++)
 792                 IWL_DEBUG_RATE("lq index %d 0x%X\n",
 793                                i, lq->rs_table[i].rate_n_flags);
 794 }
 795 #else
 796 static inline void iwl_dump_lq_cmd(struct iwl_priv *priv,
 797                                    struct iwl_link_quality_cmd *lq)
 798 {
 799 }
 800 #endif
 801
 802 int iwl_send_lq_cmd(struct iwl_priv *priv,
 803                     struct iwl_link_quality_cmd *lq, u8 flags)
 804 {
 805         struct iwl_host_cmd cmd = {
 806                 .id = REPLY_TX_LINK_QUALITY_CMD,
 807                 .len = sizeof(struct iwl_link_quality_cmd),
 808                 .meta.flags = flags,
 809                 .data = lq,
 810         };
 811
 812         if ((lq->sta_id == 0xFF) &&
 813             (priv->iw_mode == NL80211_IFTYPE_ADHOC))
 814                 return -EINVAL;
 815
 816         if (lq->sta_id == 0xFF)
 817                 lq->sta_id = IWL_AP_ID;
 818
 819         iwl_dump_lq_cmd(priv, lq);
 820
 821         if (iwl_is_associated(priv) && priv->assoc_station_added)
 822                 return  iwl_send_cmd(priv, &cmd);
 823
 824         return 0;
 825 }
 826 EXPORT_SYMBOL(iwl_send_lq_cmd);
 827
 828 /**
 829  * iwl_sta_init_lq - Initialize a station's hardware rate table
 830  *
 831  * The uCode's station table contains a table of fallback rates
 832  * for automatic fallback during transmission.
 833  *
 834  * NOTE: This sets up a default set of values.  These will be replaced later
 835  *       if the driver's iwl-agn-rs rate scaling algorithm is used, instead of
 836  *       rc80211_simple.
 837  *
 838  * NOTE: Run REPLY_ADD_STA command to set up station table entry, before
 839  *       calling this function (which runs REPLY_TX_LINK_QUALITY_CMD,
 840  *       which requires station table entry to exist).
 841  */
 842 static void iwl_sta_init_lq(struct iwl_priv *priv, const u8 *addr, int is_ap)
 843 {
 844         int i, r;
 845         struct iwl_link_quality_cmd link_cmd = {
 846                 .reserved1 = 0,
 847         };
 848         u32 rate_flags;
 849
 850         /* Set up the rate scaling to start at selected rate, fall back
 851          * all the way down to 1M in IEEE order, and then spin on 1M */
 852         if (is_ap)
 853                 r = IWL_RATE_54M_INDEX;
 854         else if (priv->band == IEEE80211_BAND_5GHZ)
 855                 r = IWL_RATE_6M_INDEX;
 856         else
 857                 r = IWL_RATE_1M_INDEX;
 858
 859         for (i = 0; i < LINK_QUAL_MAX_RETRY_NUM; i++) {
 860                 rate_flags = 0;
 861                 if (r >= IWL_FIRST_CCK_RATE && r <= IWL_LAST_CCK_RATE)
 862                         rate_flags |= RATE_MCS_CCK_MSK;
 863
 864                 rate_flags |= first_antenna(priv->hw_params.valid_tx_ant) <<
 865                                 RATE_MCS_ANT_POS;
 866
 867                 link_cmd.rs_table[i].rate_n_flags =
 868                         iwl_hw_set_rate_n_flags(iwl_rates[r].plcp, rate_flags);
 869                 r = iwl4965_get_prev_ieee_rate(r);
 870         }
 871
 872         link_cmd.general_params.single_stream_ant_msk =
 873                                 first_antenna(priv->hw_params.valid_tx_ant);
 874         link_cmd.general_params.dual_stream_ant_msk = 3;
 875         link_cmd.agg_params.agg_dis_start_th = 3;
 876         link_cmd.agg_params.agg_time_limit = cpu_to_le16(4000);
 877
 878         /* Update the rate scaling for control frame Tx to AP */
 879         link_cmd.sta_id = is_ap ? IWL_AP_ID : priv->hw_params.bcast_sta_id;
 880
 881         iwl_send_cmd_pdu_async(priv, REPLY_TX_LINK_QUALITY_CMD,
 882                                sizeof(link_cmd), &link_cmd, NULL);
 883 }
 884
 885 /**
 886  * iwl_rxon_add_station - add station into station table.
 887  *
 888  * there is only one AP station with id= IWL_AP_ID
 889  * NOTE: mutex must be held before calling this fnction
 890  */
 891 int iwl_rxon_add_station(struct iwl_priv *priv, const u8 *addr, int is_ap)
 892 {
 893         u8 sta_id;
 894
 895         /* Add station to device's station table */
 896         struct ieee80211_conf *conf = &priv->hw->conf;
 897         struct ieee80211_sta_ht_cap *cur_ht_config = &conf->ht_cap;
 898
 899         if ((is_ap) &&
 900             (conf->flags & IEEE80211_CONF_SUPPORT_HT_MODE) &&
 901             (priv->iw_mode == NL80211_IFTYPE_STATION))
 902                 sta_id = iwl_add_station_flags(priv, addr, is_ap,
 903                                                    0, cur_ht_config);
 904         else
 905                 sta_id = iwl_add_station_flags(priv, addr, is_ap,
 906                                                    0, NULL);
 907
 908         /* Set up default rate scaling table in device's station table */
 909         iwl_sta_init_lq(priv, addr, is_ap);
 910
 911         return sta_id;
 912 }
 913 EXPORT_SYMBOL(iwl_rxon_add_station);
 914
 915 /**
 916  * iwl_get_sta_id - Find station's index within station table
 917  *
 918  * If new IBSS station, create new entry in station table
 919  */
 920 int iwl_get_sta_id(struct iwl_priv *priv, struct ieee80211_hdr *hdr)
 921 {
 922         int sta_id;
 923         u16 fc = le16_to_cpu(hdr->frame_control);
 924
 925         /* If this frame is broadcast or management, use broadcast station id */
 926         if (((fc & IEEE80211_FCTL_FTYPE) != IEEE80211_FTYPE_DATA) ||
 927             is_multicast_ether_addr(hdr->addr1))
 928                 return priv->hw_params.bcast_sta_id;
 929
 930         switch (priv->iw_mode) {
 931
 932         /* If we are a client station in a BSS network, use the special
 933          * AP station entry (that's the only station we communicate with) */
 934         case NL80211_IFTYPE_STATION:
 935                 return IWL_AP_ID;
 936
 937         /* If we are an AP, then find the station, or use BCAST */
 938         case NL80211_IFTYPE_AP:
 939                 sta_id = iwl_find_station(priv, hdr->addr1);
 940                 if (sta_id != IWL_INVALID_STATION)
 941                         return sta_id;
 942                 return priv->hw_params.bcast_sta_id;
 943
 944         /* If this frame is going out to an IBSS network, find the station,
 945          * or create a new station table entry */
 946         case NL80211_IFTYPE_ADHOC:
 947                 sta_id = iwl_find_station(priv, hdr->addr1);
 948                 if (sta_id != IWL_INVALID_STATION)
 949                         return sta_id;
 950
 951                 /* Create new station table entry */
 952                 sta_id = iwl_add_station_flags(priv, hdr->addr1,
 953                                                    0, CMD_ASYNC, NULL);
 954
 955                 if (sta_id != IWL_INVALID_STATION)
 956                         return sta_id;
 957
 958                 IWL_DEBUG_DROP("Station %pM not in station map. "
 959                                "Defaulting to broadcast...\n",
 960                                hdr->addr1);
 961                 iwl_print_hex_dump(priv, IWL_DL_DROP, (u8 *) hdr, sizeof(*hdr));
 962                 return priv->hw_params.bcast_sta_id;
 963
 964         /* If we are in monitor mode, use BCAST. This is required for
 965          * packet injection. */
 966         case NL80211_IFTYPE_MONITOR:
 967                 return priv->hw_params.bcast_sta_id;
 968
 969         default:
 970                 IWL_WARNING("Unknown mode of operation: %d\n", priv->iw_mode);
 971                 return priv->hw_params.bcast_sta_id;
 972         }
 973 }
 974 EXPORT_SYMBOL(iwl_get_sta_id);
 975
 976 /**
 977  * iwl_sta_modify_enable_tid_tx - Enable Tx for this TID in station table
 978  */
 979 void iwl_sta_modify_enable_tid_tx(struct iwl_priv *priv, int sta_id, int tid)
 980 {
 981         unsigned long flags;
 982
 983         /* Remove "disable" flag, to enable Tx for this TID */
 984         spin_lock_irqsave(&priv->sta_lock, flags);
 985         priv->stations[sta_id].sta.sta.modify_mask = STA_MODIFY_TID_DISABLE_TX;
 986         priv->stations[sta_id].sta.tid_disable_tx &= cpu_to_le16(~(1 << tid));
 987         priv->stations[sta_id].sta.mode = STA_CONTROL_MODIFY_MSK;
 988         spin_unlock_irqrestore(&priv->sta_lock, flags);
 989
 990         iwl_send_add_sta(priv, &priv->stations[sta_id].sta, CMD_ASYNC);
 991 }
 992 EXPORT_SYMBOL(iwl_sta_modify_enable_tid_tx);
 993