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         DECLARE_MAC_BUF(mac);
  49
  50         if ((priv->iw_mode == IEEE80211_IF_TYPE_IBSS) ||
  51             (priv->iw_mode == IEEE80211_IF_TYPE_AP))
  52                 start = IWL_STA_ID;
  53
  54         if (is_broadcast_ether_addr(addr))
  55                 return priv->hw_params.bcast_sta_id;
  56
  57         spin_lock_irqsave(&priv->sta_lock, flags);
  58         for (i = start; i < priv->hw_params.max_stations; i++)
  59                 if (priv->stations[i].used &&
  60                     (!compare_ether_addr(priv->stations[i].sta.sta.addr,
  61                                          addr))) {
  62                         ret = i;
  63                         goto out;
  64                 }
  65
  66         IWL_DEBUG_ASSOC_LIMIT("can not find STA %s total %d\n",
  67                               print_mac(mac, addr), priv->num_stations);
  68
  69  out:
  70         spin_unlock_irqrestore(&priv->sta_lock, flags);
  71         return ret;
  72 }
  73 EXPORT_SYMBOL(iwl_find_station);
  74
  75 int iwl_get_ra_sta_id(struct iwl_priv *priv, struct ieee80211_hdr *hdr)
  76 {
  77         if (priv->iw_mode == IEEE80211_IF_TYPE_STA) {
  78                 return IWL_AP_ID;
  79         } else {
  80                 u8 *da = ieee80211_get_DA(hdr);
  81                 return iwl_find_station(priv, da);
  82         }
  83 }
  84 EXPORT_SYMBOL(iwl_get_ra_sta_id);
  85
  86 static void iwl_sta_ucode_activate(struct iwl_priv *priv, u8 sta_id)
  87 {
  88         unsigned long flags;
  89         DECLARE_MAC_BUF(mac);
  90
  91         spin_lock_irqsave(&priv->sta_lock, flags);
  92
  93         if (!(priv->stations[sta_id].used & IWL_STA_DRIVER_ACTIVE))
  94                 IWL_ERROR("ACTIVATE a non DRIVER active station %d\n", sta_id);
  95
  96         priv->stations[sta_id].used |= IWL_STA_UCODE_ACTIVE;
  97         IWL_DEBUG_ASSOC("Added STA to Ucode: %s\n",
  98                         print_mac(mac, priv->stations[sta_id].sta.sta.addr));
  99
 100         spin_unlock_irqrestore(&priv->sta_lock, flags);
 101 }
 102
 103 static int iwl_add_sta_callback(struct iwl_priv *priv,
 104                                    struct iwl_cmd *cmd, struct sk_buff *skb)
 105 {
 106         struct iwl_rx_packet *res = NULL;
 107         u8 sta_id = cmd->cmd.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_ht_info *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_MIMO_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_MIMO_PS_STATIC:
 202                 sta_flags |= STA_FLG_MIMO_DIS_MSK;
 203                 break;
 204         case WLAN_HT_CAP_MIMO_PS_DYNAMIC:
 205                 sta_flags |= STA_FLG_RTS_MIMO_PROT_MSK;
 206                 break;
 207         case WLAN_HT_CAP_MIMO_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_ht_info *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         DECLARE_MAC_BUF(mac);
 241
 242         spin_lock_irqsave(&priv->sta_lock, flags_spin);
 243         if (is_ap)
 244                 sta_id = IWL_AP_ID;
 245         else if (is_broadcast_ether_addr(addr))
 246                 sta_id = priv->hw_params.bcast_sta_id;
 247         else
 248                 for (i = IWL_STA_ID; i < priv->hw_params.max_stations; i++) {
 249                         if (!compare_ether_addr(priv->stations[i].sta.sta.addr,
 250                                                 addr)) {
 251                                 sta_id = i;
 252                                 break;
 253                         }
 254
 255                         if (!priv->stations[i].used &&
 256                             sta_id == IWL_INVALID_STATION)
 257                                 sta_id = i;
 258                 }
 259
 260         /* These two conditions have the same outcome, but keep them separate
 261            since they have different meanings */
 262         if (unlikely(sta_id == IWL_INVALID_STATION)) {
 263                 spin_unlock_irqrestore(&priv->sta_lock, flags_spin);
 264                 return sta_id;
 265         }
 266
 267         if (priv->stations[sta_id].used &&
 268             !compare_ether_addr(priv->stations[sta_id].sta.sta.addr, addr)) {
 269                 spin_unlock_irqrestore(&priv->sta_lock, flags_spin);
 270                 return sta_id;
 271         }
 272
 273
 274         station = &priv->stations[sta_id];
 275         station->used = IWL_STA_DRIVER_ACTIVE;
 276         IWL_DEBUG_ASSOC("Add STA to driver ID %d: %s\n",
 277                         sta_id, print_mac(mac, addr));
 278         priv->num_stations++;
 279
 280         /* Set up the REPLY_ADD_STA command to send to device */
 281         memset(&station->sta, 0, sizeof(struct iwl_addsta_cmd));
 282         memcpy(station->sta.sta.addr, addr, ETH_ALEN);
 283         station->sta.mode = 0;
 284         station->sta.sta.sta_id = sta_id;
 285         station->sta.station_flags = 0;
 286
 287         /* BCAST station and IBSS stations do not work in HT mode */
 288         if (sta_id != priv->hw_params.bcast_sta_id &&
 289             priv->iw_mode != IEEE80211_IF_TYPE_IBSS)
 290                 iwl_set_ht_add_station(priv, sta_id, ht_info);
 291
 292         spin_unlock_irqrestore(&priv->sta_lock, flags_spin);
 293
 294         /* Add station to device's station table */
 295         iwl_send_add_sta(priv, &station->sta, flags);
 296         return sta_id;
 297
 298 }
 299 EXPORT_SYMBOL(iwl_add_station_flags);
 300
 301 static void iwl_sta_ucode_deactivate(struct iwl_priv *priv, const char *addr)
 302 {
 303         unsigned long flags;
 304         DECLARE_MAC_BUF(mac);
 305
 306         u8 sta_id = iwl_find_station(priv, addr);
 307
 308         BUG_ON(sta_id == IWL_INVALID_STATION);
 309
 310         IWL_DEBUG_ASSOC("Removed STA from Ucode: %s\n",
 311                         print_mac(mac, addr));
 312
 313         spin_lock_irqsave(&priv->sta_lock, flags);
 314
 315         /* Ucode must be active and driver must be non active */
 316         if (priv->stations[sta_id].used != IWL_STA_UCODE_ACTIVE)
 317                 IWL_ERROR("removed non active STA %d\n", sta_id);
 318
 319         priv->stations[sta_id].used &= ~IWL_STA_UCODE_ACTIVE;
 320
 321         memset(&priv->stations[sta_id], 0, sizeof(struct iwl_station_entry));
 322         spin_unlock_irqrestore(&priv->sta_lock, flags);
 323 }
 324
 325 static int iwl_remove_sta_callback(struct iwl_priv *priv,
 326                                    struct iwl_cmd *cmd, struct sk_buff *skb)
 327 {
 328         struct iwl_rx_packet *res = NULL;
 329         const char *addr = cmd->cmd.rm_sta.addr;
 330
 331         if (!skb) {
 332                 IWL_ERROR("Error: Response NULL in REPLY_REMOVE_STA.\n");
 333                 return 1;
 334         }
 335
 336         res = (struct iwl_rx_packet *)skb->data;
 337         if (res->hdr.flags & IWL_CMD_FAILED_MSK) {
 338                 IWL_ERROR("Bad return from REPLY_REMOVE_STA (0x%08X)\n",
 339                 res->hdr.flags);
 340                 return 1;
 341         }
 342
 343         switch (res->u.rem_sta.status) {
 344         case REM_STA_SUCCESS_MSK:
 345                 iwl_sta_ucode_deactivate(priv, addr);
 346                 break;
 347         default:
 348                 IWL_ERROR("REPLY_REMOVE_STA failed\n");
 349                 break;
 350         }
 351
 352         /* We didn't cache the SKB; let the caller free it */
 353         return 1;
 354 }
 355
 356 static int iwl_send_remove_station(struct iwl_priv *priv, const u8 *addr,
 357                                    u8 flags)
 358 {
 359         struct iwl_rx_packet *res = NULL;
 360         int ret;
 361
 362         struct iwl_rem_sta_cmd rm_sta_cmd;
 363
 364         struct iwl_host_cmd cmd = {
 365                 .id = REPLY_REMOVE_STA,
 366                 .len = sizeof(struct iwl_rem_sta_cmd),
 367                 .meta.flags = flags,
 368                 .data = &rm_sta_cmd,
 369         };
 370
 371         memset(&rm_sta_cmd, 0, sizeof(rm_sta_cmd));
 372         rm_sta_cmd.num_sta = 1;
 373         memcpy(&rm_sta_cmd.addr, addr , ETH_ALEN);
 374
 375         if (flags & CMD_ASYNC)
 376                 cmd.meta.u.callback = iwl_remove_sta_callback;
 377         else
 378                 cmd.meta.flags |= CMD_WANT_SKB;
 379         ret = iwl_send_cmd(priv, &cmd);
 380
 381         if (ret || (flags & CMD_ASYNC))
 382                 return ret;
 383
 384         res = (struct iwl_rx_packet *)cmd.meta.u.skb->data;
 385         if (res->hdr.flags & IWL_CMD_FAILED_MSK) {
 386                 IWL_ERROR("Bad return from REPLY_REMOVE_STA (0x%08X)\n",
 387                           res->hdr.flags);
 388                 ret = -EIO;
 389         }
 390
 391         if (!ret) {
 392                 switch (res->u.rem_sta.status) {
 393                 case REM_STA_SUCCESS_MSK:
 394                         iwl_sta_ucode_deactivate(priv, addr);
 395                         IWL_DEBUG_ASSOC("REPLY_REMOVE_STA PASSED\n");
 396                         break;
 397                 default:
 398                         ret = -EIO;
 399                         IWL_ERROR("REPLY_REMOVE_STA failed\n");
 400                         break;
 401                 }
 402         }
 403
 404         priv->alloc_rxb_skb--;
 405         dev_kfree_skb_any(cmd.meta.u.skb);
 406
 407         return ret;
 408 }
 409
 410 /**
 411  * iwl_remove_station - Remove driver's knowledge of station.
 412  */
 413 int iwl_remove_station(struct iwl_priv *priv, const u8 *addr, int is_ap)
 414 {
 415         int sta_id = IWL_INVALID_STATION;
 416         int i, ret = -EINVAL;
 417         unsigned long flags;
 418         DECLARE_MAC_BUF(mac);
 419
 420         spin_lock_irqsave(&priv->sta_lock, flags);
 421
 422         if (is_ap)
 423                 sta_id = IWL_AP_ID;
 424         else if (is_broadcast_ether_addr(addr))
 425                 sta_id = priv->hw_params.bcast_sta_id;
 426         else
 427                 for (i = IWL_STA_ID; i < priv->hw_params.max_stations; i++)
 428                         if (priv->stations[i].used &&
 429                             !compare_ether_addr(priv->stations[i].sta.sta.addr,
 430                                                 addr)) {
 431                                 sta_id = i;
 432                                 break;
 433                         }
 434
 435         if (unlikely(sta_id == IWL_INVALID_STATION))
 436                 goto out;
 437
 438         IWL_DEBUG_ASSOC("Removing STA from driver:%d  %s\n",
 439                 sta_id, print_mac(mac, addr));
 440
 441         if (!(priv->stations[sta_id].used & IWL_STA_DRIVER_ACTIVE)) {
 442                 IWL_ERROR("Removing %s but non DRIVER active\n",
 443                                 print_mac(mac, addr));
 444                 goto out;
 445         }
 446
 447         if (!(priv->stations[sta_id].used & IWL_STA_UCODE_ACTIVE)) {
 448                 IWL_ERROR("Removing %s but non UCODE active\n",
 449                                 print_mac(mac, addr));
 450                 goto out;
 451         }
 452
 453
 454         priv->stations[sta_id].used &= ~IWL_STA_DRIVER_ACTIVE;
 455
 456         priv->num_stations--;
 457
 458         BUG_ON(priv->num_stations < 0);
 459
 460         spin_unlock_irqrestore(&priv->sta_lock, flags);
 461
 462         ret = iwl_send_remove_station(priv, addr, CMD_ASYNC);
 463         return ret;
 464 out:
 465         spin_unlock_irqrestore(&priv->sta_lock, flags);
 466         return ret;
 467 }
 468 EXPORT_SYMBOL(iwl_remove_station);
 469
 470 static int iwl_get_free_ucode_key_index(struct iwl_priv *priv)
 471 {
 472         int i;
 473
 474         for (i = 0; i < STA_KEY_MAX_NUM; i++)
 475                 if (!test_and_set_bit(i, &priv->ucode_key_table))
 476                         return i;
 477
 478         return -1;
 479 }
 480
 481 int iwl_send_static_wepkey_cmd(struct iwl_priv *priv, u8 send_if_empty)
 482 {
 483         int i, not_empty = 0;
 484         u8 buff[sizeof(struct iwl_wep_cmd) +
 485                 sizeof(struct iwl_wep_key) * WEP_KEYS_MAX];
 486         struct iwl_wep_cmd *wep_cmd = (struct iwl_wep_cmd *)buff;
 487         size_t cmd_size  = sizeof(struct iwl_wep_cmd);
 488         struct iwl_host_cmd cmd = {
 489                 .id = REPLY_WEPKEY,
 490                 .data = wep_cmd,
 491                 .meta.flags = CMD_ASYNC,
 492         };
 493
 494         memset(wep_cmd, 0, cmd_size +
 495                         (sizeof(struct iwl_wep_key) * WEP_KEYS_MAX));
 496
 497         for (i = 0; i < WEP_KEYS_MAX ; i++) {
 498                 wep_cmd->key[i].key_index = i;
 499                 if (priv->wep_keys[i].key_size) {
 500                         wep_cmd->key[i].key_offset = i;
 501                         not_empty = 1;
 502                 } else {
 503                         wep_cmd->key[i].key_offset = WEP_INVALID_OFFSET;
 504                 }
 505
 506                 wep_cmd->key[i].key_size = priv->wep_keys[i].key_size;
 507                 memcpy(&wep_cmd->key[i].key[3], priv->wep_keys[i].key,
 508                                 priv->wep_keys[i].key_size);
 509         }
 510
 511         wep_cmd->global_key_type = WEP_KEY_WEP_TYPE;
 512         wep_cmd->num_keys = WEP_KEYS_MAX;
 513
 514         cmd_size += sizeof(struct iwl_wep_key) * WEP_KEYS_MAX;
 515
 516         cmd.len = cmd_size;
 517
 518         if (not_empty || send_if_empty)
 519                 return iwl_send_cmd(priv, &cmd);
 520         else
 521                 return 0;
 522 }
 523 EXPORT_SYMBOL(iwl_send_static_wepkey_cmd);
 524
 525 int iwl_remove_default_wep_key(struct iwl_priv *priv,
 526                                struct ieee80211_key_conf *keyconf)
 527 {
 528         int ret;
 529         unsigned long flags;
 530
 531         spin_lock_irqsave(&priv->sta_lock, flags);
 532
 533         if (!test_and_clear_bit(keyconf->keyidx, &priv->ucode_key_table))
 534                 IWL_ERROR("index %d not used in uCode key table.\n",
 535                           keyconf->keyidx);
 536
 537         priv->default_wep_key--;
 538         memset(&priv->wep_keys[keyconf->keyidx], 0, sizeof(priv->wep_keys[0]));
 539         ret = iwl_send_static_wepkey_cmd(priv, 1);
 540         IWL_DEBUG_WEP("Remove default WEP key: idx=%d ret=%d\n",
 541                       keyconf->keyidx, ret);
 542         spin_unlock_irqrestore(&priv->sta_lock, flags);
 543
 544         return ret;
 545 }
 546 EXPORT_SYMBOL(iwl_remove_default_wep_key);
 547
 548 int iwl_set_default_wep_key(struct iwl_priv *priv,
 549                             struct ieee80211_key_conf *keyconf)
 550 {
 551         int ret;
 552         unsigned long flags;
 553
 554         if (keyconf->keylen != WEP_KEY_LEN_128 &&
 555             keyconf->keylen != WEP_KEY_LEN_64) {
 556                 IWL_DEBUG_WEP("Bad WEP key length %d\n", keyconf->keylen);
 557                 return -EINVAL;
 558         }
 559
 560         keyconf->flags &= ~IEEE80211_KEY_FLAG_GENERATE_IV;
 561         keyconf->hw_key_idx = HW_KEY_DEFAULT;
 562         priv->stations[IWL_AP_ID].keyinfo.alg = ALG_WEP;
 563
 564         spin_lock_irqsave(&priv->sta_lock, flags);
 565         priv->default_wep_key++;
 566
 567         if (test_and_set_bit(keyconf->keyidx, &priv->ucode_key_table))
 568                 IWL_ERROR("index %d already used in uCode key table.\n",
 569                         keyconf->keyidx);
 570
 571         priv->wep_keys[keyconf->keyidx].key_size = keyconf->keylen;
 572         memcpy(&priv->wep_keys[keyconf->keyidx].key, &keyconf->key,
 573                                                         keyconf->keylen);
 574
 575         ret = iwl_send_static_wepkey_cmd(priv, 0);
 576         IWL_DEBUG_WEP("Set default WEP key: len=%d idx=%d ret=%d\n",
 577                 keyconf->keylen, keyconf->keyidx, ret);
 578         spin_unlock_irqrestore(&priv->sta_lock, flags);
 579
 580         return ret;
 581 }
 582 EXPORT_SYMBOL(iwl_set_default_wep_key);
 583
 584 static int iwl_set_wep_dynamic_key_info(struct iwl_priv *priv,
 585                                 struct ieee80211_key_conf *keyconf,
 586                                 u8 sta_id)
 587 {
 588         unsigned long flags;
 589         __le16 key_flags = 0;
 590         int ret;
 591
 592         keyconf->flags &= ~IEEE80211_KEY_FLAG_GENERATE_IV;
 593
 594         key_flags |= (STA_KEY_FLG_WEP | STA_KEY_FLG_MAP_KEY_MSK);
 595         key_flags |= cpu_to_le16(keyconf->keyidx << STA_KEY_FLG_KEYID_POS);
 596         key_flags &= ~STA_KEY_FLG_INVALID;
 597
 598         if (keyconf->keylen == WEP_KEY_LEN_128)
 599                 key_flags |= STA_KEY_FLG_KEY_SIZE_MSK;
 600
 601         if (sta_id == priv->hw_params.bcast_sta_id)
 602                 key_flags |= STA_KEY_MULTICAST_MSK;
 603
 604         spin_lock_irqsave(&priv->sta_lock, flags);
 605
 606         priv->stations[sta_id].keyinfo.alg = keyconf->alg;
 607         priv->stations[sta_id].keyinfo.keylen = keyconf->keylen;
 608         priv->stations[sta_id].keyinfo.keyidx = keyconf->keyidx;
 609
 610         memcpy(priv->stations[sta_id].keyinfo.key,
 611                                 keyconf->key, keyconf->keylen);
 612
 613         memcpy(&priv->stations[sta_id].sta.key.key[3],
 614                                 keyconf->key, keyconf->keylen);
 615
 616         if ((priv->stations[sta_id].sta.key.key_flags & STA_KEY_FLG_ENCRYPT_MSK)
 617                         == STA_KEY_FLG_NO_ENC)
 618                 priv->stations[sta_id].sta.key.key_offset =
 619                                  iwl_get_free_ucode_key_index(priv);
 620         /* else, we are overriding an existing key => no need to allocated room
 621          * in uCode. */
 622
 623         priv->stations[sta_id].sta.key.key_flags = key_flags;
 624         priv->stations[sta_id].sta.sta.modify_mask = STA_MODIFY_KEY_MASK;
 625         priv->stations[sta_id].sta.mode = STA_CONTROL_MODIFY_MSK;
 626
 627         ret = iwl_send_add_sta(priv, &priv->stations[sta_id].sta, CMD_ASYNC);
 628
 629         spin_unlock_irqrestore(&priv->sta_lock, flags);
 630
 631         return ret;
 632 }
 633
 634 static int iwl_set_ccmp_dynamic_key_info(struct iwl_priv *priv,
 635                                    struct ieee80211_key_conf *keyconf,
 636                                    u8 sta_id)
 637 {
 638         unsigned long flags;
 639         __le16 key_flags = 0;
 640
 641         key_flags |= (STA_KEY_FLG_CCMP | STA_KEY_FLG_MAP_KEY_MSK);
 642         key_flags |= cpu_to_le16(keyconf->keyidx << STA_KEY_FLG_KEYID_POS);
 643         key_flags &= ~STA_KEY_FLG_INVALID;
 644
 645         if (sta_id == priv->hw_params.bcast_sta_id)
 646                 key_flags |= STA_KEY_MULTICAST_MSK;
 647
 648         keyconf->flags |= IEEE80211_KEY_FLAG_GENERATE_IV;
 649
 650         spin_lock_irqsave(&priv->sta_lock, flags);
 651         priv->stations[sta_id].keyinfo.alg = keyconf->alg;
 652         priv->stations[sta_id].keyinfo.keylen = keyconf->keylen;
 653
 654         memcpy(priv->stations[sta_id].keyinfo.key, keyconf->key,
 655                keyconf->keylen);
 656
 657         memcpy(priv->stations[sta_id].sta.key.key, keyconf->key,
 658                keyconf->keylen);
 659
 660         if ((priv->stations[sta_id].sta.key.key_flags & STA_KEY_FLG_ENCRYPT_MSK)
 661                         == STA_KEY_FLG_NO_ENC)
 662                 priv->stations[sta_id].sta.key.key_offset =
 663                                  iwl_get_free_ucode_key_index(priv);
 664         /* else, we are overriding an existing key => no need to allocated room
 665          * in uCode. */
 666
 667         priv->stations[sta_id].sta.key.key_flags = key_flags;
 668         priv->stations[sta_id].sta.sta.modify_mask = STA_MODIFY_KEY_MASK;
 669         priv->stations[sta_id].sta.mode = STA_CONTROL_MODIFY_MSK;
 670
 671         spin_unlock_irqrestore(&priv->sta_lock, flags);
 672
 673         IWL_DEBUG_INFO("hwcrypto: modify ucode station key info\n");
 674         return iwl_send_add_sta(priv, &priv->stations[sta_id].sta, CMD_ASYNC);
 675 }
 676
 677 static int iwl_set_tkip_dynamic_key_info(struct iwl_priv *priv,
 678                                    struct ieee80211_key_conf *keyconf,
 679                                    u8 sta_id)
 680 {
 681         unsigned long flags;
 682         int ret = 0;
 683
 684         keyconf->flags |= IEEE80211_KEY_FLAG_GENERATE_IV;
 685         keyconf->flags |= IEEE80211_KEY_FLAG_GENERATE_MMIC;
 686
 687         spin_lock_irqsave(&priv->sta_lock, flags);
 688
 689         priv->stations[sta_id].keyinfo.alg = keyconf->alg;
 690         priv->stations[sta_id].keyinfo.keylen = 16;
 691
 692         if ((priv->stations[sta_id].sta.key.key_flags & STA_KEY_FLG_ENCRYPT_MSK)
 693                         == STA_KEY_FLG_NO_ENC)
 694                 priv->stations[sta_id].sta.key.key_offset =
 695                                  iwl_get_free_ucode_key_index(priv);
 696         /* else, we are overriding an existing key => no need to allocated room
 697          * in uCode. */
 698
 699         /* This copy is acutally not needed: we get the key with each TX */
 700         memcpy(priv->stations[sta_id].keyinfo.key, keyconf->key, 16);
 701
 702         memcpy(priv->stations[sta_id].sta.key.key, keyconf->key, 16);
 703
 704         spin_unlock_irqrestore(&priv->sta_lock, flags);
 705
 706         return ret;
 707 }
 708
 709 int iwl_remove_dynamic_key(struct iwl_priv *priv,
 710                                 struct ieee80211_key_conf *keyconf,
 711                                 u8 sta_id)
 712 {
 713         unsigned long flags;
 714         int ret = 0;
 715         u16 key_flags;
 716         u8 keyidx;
 717
 718         priv->key_mapping_key--;
 719
 720         spin_lock_irqsave(&priv->sta_lock, flags);
 721         key_flags = le16_to_cpu(priv->stations[sta_id].sta.key.key_flags);
 722         keyidx = (key_flags >> STA_KEY_FLG_KEYID_POS) & 0x3;
 723
 724         IWL_DEBUG_WEP("Remove dynamic key: idx=%d sta=%d\n",
 725                       keyconf->keyidx, sta_id);
 726
 727         if (keyconf->keyidx != keyidx) {
 728                 /* We need to remove a key with index different that the one
 729                  * in the uCode. This means that the key we need to remove has
 730                  * been replaced by another one with different index.
 731                  * Don't do anything and return ok
 732                  */
 733                 spin_unlock_irqrestore(&priv->sta_lock, flags);
 734                 return 0;
 735         }
 736
 737         if (!test_and_clear_bit(priv->stations[sta_id].sta.key.key_offset,
 738                 &priv->ucode_key_table))
 739                 IWL_ERROR("index %d not used in uCode key table.\n",
 740                         priv->stations[sta_id].sta.key.key_offset);
 741         memset(&priv->stations[sta_id].keyinfo, 0,
 742                                         sizeof(struct iwl_hw_key));
 743         memset(&priv->stations[sta_id].sta.key, 0,
 744                                         sizeof(struct iwl4965_keyinfo));
 745         priv->stations[sta_id].sta.key.key_flags =
 746                         STA_KEY_FLG_NO_ENC | STA_KEY_FLG_INVALID;
 747         priv->stations[sta_id].sta.key.key_offset = WEP_INVALID_OFFSET;
 748         priv->stations[sta_id].sta.sta.modify_mask = STA_MODIFY_KEY_MASK;
 749         priv->stations[sta_id].sta.mode = STA_CONTROL_MODIFY_MSK;
 750
 751         ret =  iwl_send_add_sta(priv, &priv->stations[sta_id].sta, CMD_ASYNC);
 752         spin_unlock_irqrestore(&priv->sta_lock, flags);
 753         return ret;
 754 }
 755 EXPORT_SYMBOL(iwl_remove_dynamic_key);
 756
 757 int iwl_set_dynamic_key(struct iwl_priv *priv,
 758                                 struct ieee80211_key_conf *keyconf, u8 sta_id)
 759 {
 760         int ret;
 761
 762         priv->key_mapping_key++;
 763         keyconf->hw_key_idx = HW_KEY_DYNAMIC;
 764
 765         switch (keyconf->alg) {
 766         case ALG_CCMP:
 767                 ret = iwl_set_ccmp_dynamic_key_info(priv, keyconf, sta_id);
 768                 break;
 769         case ALG_TKIP:
 770                 ret = iwl_set_tkip_dynamic_key_info(priv, keyconf, sta_id);
 771                 break;
 772         case ALG_WEP:
 773                 ret = iwl_set_wep_dynamic_key_info(priv, keyconf, sta_id);
 774                 break;
 775         default:
 776                 IWL_ERROR("Unknown alg: %s alg = %d\n", __func__, keyconf->alg);
 777                 ret = -EINVAL;
 778         }
 779
 780         IWL_DEBUG_WEP("Set dynamic key: alg= %d len=%d idx=%d sta=%d ret=%d\n",
 781                       keyconf->alg, keyconf->keylen, keyconf->keyidx,
 782                       sta_id, ret);
 783
 784         return ret;
 785 }
 786 EXPORT_SYMBOL(iwl_set_dynamic_key);
 787
 788 #ifdef CONFIG_IWLWIFI_DEBUG
 789 static void iwl_dump_lq_cmd(struct iwl_priv *priv,
 790                            struct iwl_link_quality_cmd *lq)
 791 {
 792         int i;
 793         IWL_DEBUG_RATE("lq station id 0x%x\n", lq->sta_id);
 794         IWL_DEBUG_RATE("lq dta 0x%X 0x%X\n",
 795                        lq->general_params.single_stream_ant_msk,
 796                        lq->general_params.dual_stream_ant_msk);
 797
 798         for (i = 0; i < LINK_QUAL_MAX_RETRY_NUM; i++)
 799                 IWL_DEBUG_RATE("lq index %d 0x%X\n",
 800                                i, lq->rs_table[i].rate_n_flags);
 801 }
 802 #else
 803 static inline void iwl_dump_lq_cmd(struct iwl_priv *priv,
 804                                    struct iwl_link_quality_cmd *lq)
 805 {
 806 }
 807 #endif
 808
 809 int iwl_send_lq_cmd(struct iwl_priv *priv,
 810                     struct iwl_link_quality_cmd *lq, u8 flags)
 811 {
 812         struct iwl_host_cmd cmd = {
 813                 .id = REPLY_TX_LINK_QUALITY_CMD,
 814                 .len = sizeof(struct iwl_link_quality_cmd),
 815                 .meta.flags = flags,
 816                 .data = lq,
 817         };
 818
 819         if ((lq->sta_id == 0xFF) &&
 820             (priv->iw_mode == IEEE80211_IF_TYPE_IBSS))
 821                 return -EINVAL;
 822
 823         if (lq->sta_id == 0xFF)
 824                 lq->sta_id = IWL_AP_ID;
 825
 826         iwl_dump_lq_cmd(priv, lq);
 827
 828         if (iwl_is_associated(priv) && priv->assoc_station_added)
 829                 return  iwl_send_cmd(priv, &cmd);
 830
 831         return 0;
 832 }
 833 EXPORT_SYMBOL(iwl_send_lq_cmd);
 834
 835 /**
 836  * iwl_sta_init_lq - Initialize a station's hardware rate table
 837  *
 838  * The uCode's station table contains a table of fallback rates
 839  * for automatic fallback during transmission.
 840  *
 841  * NOTE: This sets up a default set of values.  These will be replaced later
 842  *       if the driver's iwl-agn-rs rate scaling algorithm is used, instead of
 843  *       rc80211_simple.
 844  *
 845  * NOTE: Run REPLY_ADD_STA command to set up station table entry, before
 846  *       calling this function (which runs REPLY_TX_LINK_QUALITY_CMD,
 847  *       which requires station table entry to exist).
 848  */
 849 static void iwl_sta_init_lq(struct iwl_priv *priv, const u8 *addr, int is_ap)
 850 {
 851         int i, r;
 852         struct iwl_link_quality_cmd link_cmd = {
 853                 .reserved1 = 0,
 854         };
 855         u16 rate_flags;
 856
 857         /* Set up the rate scaling to start at selected rate, fall back
 858          * all the way down to 1M in IEEE order, and then spin on 1M */
 859         if (is_ap)
 860                 r = IWL_RATE_54M_INDEX;
 861         else if (priv->band == IEEE80211_BAND_5GHZ)
 862                 r = IWL_RATE_6M_INDEX;
 863         else
 864                 r = IWL_RATE_1M_INDEX;
 865
 866         for (i = 0; i < LINK_QUAL_MAX_RETRY_NUM; i++) {
 867                 rate_flags = 0;
 868                 if (r >= IWL_FIRST_CCK_RATE && r <= IWL_LAST_CCK_RATE)
 869                         rate_flags |= RATE_MCS_CCK_MSK;
 870
 871                 /* Use Tx antenna B only */
 872                 rate_flags |= RATE_MCS_ANT_B_MSK; /*FIXME:RS*/
 873
 874                 link_cmd.rs_table[i].rate_n_flags =
 875                         iwl_hw_set_rate_n_flags(iwl_rates[r].plcp, rate_flags);
 876                 r = iwl4965_get_prev_ieee_rate(r);
 877         }
 878
 879         link_cmd.general_params.single_stream_ant_msk = 2;
 880         link_cmd.general_params.dual_stream_ant_msk = 3;
 881         link_cmd.agg_params.agg_dis_start_th = 3;
 882         link_cmd.agg_params.agg_time_limit = cpu_to_le16(4000);
 883
 884         /* Update the rate scaling for control frame Tx to AP */
 885         link_cmd.sta_id = is_ap ? IWL_AP_ID : priv->hw_params.bcast_sta_id;
 886
 887         iwl_send_cmd_pdu_async(priv, REPLY_TX_LINK_QUALITY_CMD,
 888                                sizeof(link_cmd), &link_cmd, NULL);
 889 }
 890
 891 /**
 892  * iwl_rxon_add_station - add station into station table.
 893  *
 894  * there is only one AP station with id= IWL_AP_ID
 895  * NOTE: mutex must be held before calling this fnction
 896  */
 897 int iwl_rxon_add_station(struct iwl_priv *priv, const u8 *addr, int is_ap)
 898 {
 899         u8 sta_id;
 900
 901         /* Add station to device's station table */
 902         struct ieee80211_conf *conf = &priv->hw->conf;
 903         struct ieee80211_ht_info *cur_ht_config = &conf->ht_conf;
 904
 905         if ((is_ap) &&
 906             (conf->flags & IEEE80211_CONF_SUPPORT_HT_MODE) &&
 907             (priv->iw_mode == IEEE80211_IF_TYPE_STA))
 908                 sta_id = iwl_add_station_flags(priv, addr, is_ap,
 909                                                    0, cur_ht_config);
 910         else
 911                 sta_id = iwl_add_station_flags(priv, addr, is_ap,
 912                                                    0, NULL);
 913
 914         /* Set up default rate scaling table in device's station table */
 915         iwl_sta_init_lq(priv, addr, is_ap);
 916
 917         return sta_id;
 918 }
 919 EXPORT_SYMBOL(iwl_rxon_add_station);
 920
 921 /**
 922  * iwl_get_sta_id - Find station's index within station table
 923  *
 924  * If new IBSS station, create new entry in station table
 925  */
 926 int iwl_get_sta_id(struct iwl_priv *priv, struct ieee80211_hdr *hdr)
 927 {
 928         int sta_id;
 929         u16 fc = le16_to_cpu(hdr->frame_control);
 930         DECLARE_MAC_BUF(mac);
 931
 932         /* If this frame is broadcast or management, use broadcast station id */
 933         if (((fc & IEEE80211_FCTL_FTYPE) != IEEE80211_FTYPE_DATA) ||
 934             is_multicast_ether_addr(hdr->addr1))
 935                 return priv->hw_params.bcast_sta_id;
 936
 937         switch (priv->iw_mode) {
 938
 939         /* If we are a client station in a BSS network, use the special
 940          * AP station entry (that's the only station we communicate with) */
 941         case IEEE80211_IF_TYPE_STA:
 942                 return IWL_AP_ID;
 943
 944         /* If we are an AP, then find the station, or use BCAST */
 945         case IEEE80211_IF_TYPE_AP:
 946                 sta_id = iwl_find_station(priv, hdr->addr1);
 947                 if (sta_id != IWL_INVALID_STATION)
 948                         return sta_id;
 949                 return priv->hw_params.bcast_sta_id;
 950
 951         /* If this frame is going out to an IBSS network, find the station,
 952          * or create a new station table entry */
 953         case IEEE80211_IF_TYPE_IBSS:
 954                 sta_id = iwl_find_station(priv, hdr->addr1);
 955                 if (sta_id != IWL_INVALID_STATION)
 956                         return sta_id;
 957
 958                 /* Create new station table entry */
 959                 sta_id = iwl_add_station_flags(priv, hdr->addr1,
 960                                                    0, CMD_ASYNC, NULL);
 961
 962                 if (sta_id != IWL_INVALID_STATION)
 963                         return sta_id;
 964
 965                 IWL_DEBUG_DROP("Station %s not in station map. "
 966                                "Defaulting to broadcast...\n",
 967                                print_mac(mac, hdr->addr1));
 968                 iwl_print_hex_dump(priv, IWL_DL_DROP, (u8 *) hdr, sizeof(*hdr));
 969                 return priv->hw_params.bcast_sta_id;
 970
 971         default:
 972                 IWL_WARNING("Unknown mode of operation: %d\n", priv->iw_mode);
 973                 return priv->hw_params.bcast_sta_id;
 974         }
 975 }
 976 EXPORT_SYMBOL(iwl_get_sta_id);
 977
 978 /**
 979  * iwl_sta_modify_enable_tid_tx - Enable Tx for this TID in station table
 980  */
 981 void iwl_sta_modify_enable_tid_tx(struct iwl_priv *priv, int sta_id, int tid)
 982 {
 983         unsigned long flags;
 984
 985         /* Remove "disable" flag, to enable Tx for this TID */
 986         spin_lock_irqsave(&priv->sta_lock, flags);
 987         priv->stations[sta_id].sta.sta.modify_mask = STA_MODIFY_TID_DISABLE_TX;
 988         priv->stations[sta_id].sta.tid_disable_tx &= cpu_to_le16(~(1 << tid));
 989         priv->stations[sta_id].sta.mode = STA_CONTROL_MODIFY_MSK;
 990         spin_unlock_irqrestore(&priv->sta_lock, flags);
 991
 992         iwl_send_add_sta(priv, &priv->stations[sta_id].sta, CMD_ASYNC);
 993 }
 994 EXPORT_SYMBOL(iwl_sta_modify_enable_tid_tx);
 995