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           0x1     /* ucode entry is active */
  40 #define IWL_STA_UCODE_ACTIVE            0x2     /* 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 int iwl_add_sta_callback(struct iwl_priv *priv,
  87                                    struct iwl_cmd *cmd, struct sk_buff *skb)
  88 {
  89         struct iwl_rx_packet *res = NULL;
  90
  91         if (!skb) {
  92                 IWL_ERROR("Error: Response NULL in REPLY_ADD_STA.\n");
  93                 return 1;
  94         }
  95
  96         res = (struct iwl_rx_packet *)skb->data;
  97         if (res->hdr.flags & IWL_CMD_FAILED_MSK) {
  98                 IWL_ERROR("Bad return from REPLY_ADD_STA (0x%08X)\n",
  99                           res->hdr.flags);
 100                 return 1;
 101         }
 102
 103         switch (res->u.add_sta.status) {
 104         case ADD_STA_SUCCESS_MSK:
 105                 /* FIXME: implement iwl_sta_ucode_activate(priv, addr); */
 106                 /* fail through */
 107         default:
 108                 IWL_DEBUG_HC("Received REPLY_ADD_STA:(0x%08X)\n",
 109                              res->u.add_sta.status);
 110                 break;
 111         }
 112
 113         /* We didn't cache the SKB; let the caller free it */
 114         return 1;
 115 }
 116
 117 int iwl_send_add_sta(struct iwl_priv *priv,
 118                      struct iwl_addsta_cmd *sta, u8 flags)
 119 {
 120         struct iwl_rx_packet *res = NULL;
 121         int ret = 0;
 122         u8 data[sizeof(*sta)];
 123         struct iwl_host_cmd cmd = {
 124                 .id = REPLY_ADD_STA,
 125                 .meta.flags = flags,
 126                 .data = data,
 127         };
 128
 129         if (flags & CMD_ASYNC)
 130                 cmd.meta.u.callback = iwl_add_sta_callback;
 131         else
 132                 cmd.meta.flags |= CMD_WANT_SKB;
 133
 134         cmd.len = priv->cfg->ops->utils->build_addsta_hcmd(sta, data);
 135         ret = iwl_send_cmd(priv, &cmd);
 136
 137         if (ret || (flags & CMD_ASYNC))
 138                 return ret;
 139
 140         res = (struct iwl_rx_packet *)cmd.meta.u.skb->data;
 141         if (res->hdr.flags & IWL_CMD_FAILED_MSK) {
 142                 IWL_ERROR("Bad return from REPLY_ADD_STA (0x%08X)\n",
 143                           res->hdr.flags);
 144                 ret = -EIO;
 145         }
 146
 147         if (ret == 0) {
 148                 switch (res->u.add_sta.status) {
 149                 case ADD_STA_SUCCESS_MSK:
 150                         IWL_DEBUG_INFO("REPLY_ADD_STA PASSED\n");
 151                         break;
 152                 default:
 153                         ret = -EIO;
 154                         IWL_WARNING("REPLY_ADD_STA failed\n");
 155                         break;
 156                 }
 157         }
 158
 159         priv->alloc_rxb_skb--;
 160         dev_kfree_skb_any(cmd.meta.u.skb);
 161
 162         return ret;
 163 }
 164 EXPORT_SYMBOL(iwl_send_add_sta);
 165
 166 static void iwl_set_ht_add_station(struct iwl_priv *priv, u8 index,
 167                                    struct ieee80211_ht_info *sta_ht_inf)
 168 {
 169         __le32 sta_flags;
 170         u8 mimo_ps_mode;
 171
 172         if (!sta_ht_inf || !sta_ht_inf->ht_supported)
 173                 goto done;
 174
 175         mimo_ps_mode = (sta_ht_inf->cap & IEEE80211_HT_CAP_MIMO_PS) >> 2;
 176
 177         sta_flags = priv->stations[index].sta.station_flags;
 178
 179         sta_flags &= ~(STA_FLG_RTS_MIMO_PROT_MSK | STA_FLG_MIMO_DIS_MSK);
 180
 181         switch (mimo_ps_mode) {
 182         case WLAN_HT_CAP_MIMO_PS_STATIC:
 183                 sta_flags |= STA_FLG_MIMO_DIS_MSK;
 184                 break;
 185         case WLAN_HT_CAP_MIMO_PS_DYNAMIC:
 186                 sta_flags |= STA_FLG_RTS_MIMO_PROT_MSK;
 187                 break;
 188         case WLAN_HT_CAP_MIMO_PS_DISABLED:
 189                 break;
 190         default:
 191                 IWL_WARNING("Invalid MIMO PS mode %d", mimo_ps_mode);
 192                 break;
 193         }
 194
 195         sta_flags |= cpu_to_le32(
 196               (u32)sta_ht_inf->ampdu_factor << STA_FLG_MAX_AGG_SIZE_POS);
 197
 198         sta_flags |= cpu_to_le32(
 199               (u32)sta_ht_inf->ampdu_density << STA_FLG_AGG_MPDU_DENSITY_POS);
 200
 201         if (iwl_is_fat_tx_allowed(priv, sta_ht_inf))
 202                 sta_flags |= STA_FLG_FAT_EN_MSK;
 203         else
 204                 sta_flags &= ~STA_FLG_FAT_EN_MSK;
 205
 206         priv->stations[index].sta.station_flags = sta_flags;
 207  done:
 208         return;
 209 }
 210
 211 /**
 212  * iwl_add_station_flags - Add station to tables in driver and device
 213  */
 214 u8 iwl_add_station_flags(struct iwl_priv *priv, const u8 *addr, int is_ap,
 215                          u8 flags, struct ieee80211_ht_info *ht_info)
 216 {
 217         int i;
 218         int index = IWL_INVALID_STATION;
 219         struct iwl_station_entry *station;
 220         unsigned long flags_spin;
 221         DECLARE_MAC_BUF(mac);
 222
 223         spin_lock_irqsave(&priv->sta_lock, flags_spin);
 224         if (is_ap)
 225                 index = IWL_AP_ID;
 226         else if (is_broadcast_ether_addr(addr))
 227                 index = priv->hw_params.bcast_sta_id;
 228         else
 229                 for (i = IWL_STA_ID; i < priv->hw_params.max_stations; i++) {
 230                         if (!compare_ether_addr(priv->stations[i].sta.sta.addr,
 231                                                 addr)) {
 232                                 index = i;
 233                                 break;
 234                         }
 235
 236                         if (!priv->stations[i].used &&
 237                             index == IWL_INVALID_STATION)
 238                                 index = i;
 239                 }
 240
 241
 242         /* These two conditions have the same outcome, but keep them separate
 243           since they have different meanings */
 244         if (unlikely(index == IWL_INVALID_STATION)) {
 245                 spin_unlock_irqrestore(&priv->sta_lock, flags_spin);
 246                 return index;
 247         }
 248
 249         if (priv->stations[index].used &&
 250             !compare_ether_addr(priv->stations[index].sta.sta.addr, addr)) {
 251                 spin_unlock_irqrestore(&priv->sta_lock, flags_spin);
 252                 return index;
 253         }
 254
 255
 256         IWL_DEBUG_ASSOC("Add STA ID %d: %s\n", index, print_mac(mac, addr));
 257         station = &priv->stations[index];
 258         station->used = 1;
 259         priv->num_stations++;
 260
 261         /* Set up the REPLY_ADD_STA command to send to device */
 262         memset(&station->sta, 0, sizeof(struct iwl_addsta_cmd));
 263         memcpy(station->sta.sta.addr, addr, ETH_ALEN);
 264         station->sta.mode = 0;
 265         station->sta.sta.sta_id = index;
 266         station->sta.station_flags = 0;
 267
 268         /* BCAST station and IBSS stations do not work in HT mode */
 269         if (index != priv->hw_params.bcast_sta_id &&
 270             priv->iw_mode != IEEE80211_IF_TYPE_IBSS)
 271                 iwl_set_ht_add_station(priv, index, ht_info);
 272
 273         spin_unlock_irqrestore(&priv->sta_lock, flags_spin);
 274
 275         /* Add station to device's station table */
 276         iwl_send_add_sta(priv, &station->sta, flags);
 277         return index;
 278
 279 }
 280 EXPORT_SYMBOL(iwl_add_station_flags);
 281
 282 static int iwl_sta_ucode_deactivate(struct iwl_priv *priv, const char *addr)
 283 {
 284         unsigned long flags;
 285         u8 sta_id;
 286         DECLARE_MAC_BUF(mac);
 287
 288         sta_id = iwl_find_station(priv, addr);
 289         if (sta_id != IWL_INVALID_STATION) {
 290                 IWL_DEBUG_ASSOC("Removed STA from Ucode: %s\n",
 291                                 print_mac(mac, addr));
 292                 spin_lock_irqsave(&priv->sta_lock, flags);
 293                 priv->stations[sta_id].used &= ~IWL_STA_UCODE_ACTIVE;
 294                 memset(&priv->stations[sta_id], 0,
 295                         sizeof(struct iwl_station_entry));
 296                 spin_unlock_irqrestore(&priv->sta_lock, flags);
 297                 return 0;
 298         }
 299         return -EINVAL;
 300 }
 301
 302 static int iwl_remove_sta_callback(struct iwl_priv *priv,
 303                                    struct iwl_cmd *cmd, struct sk_buff *skb)
 304 {
 305         struct iwl_rx_packet *res = NULL;
 306         const char *addr = cmd->cmd.rm_sta.addr;
 307
 308         if (!skb) {
 309                 IWL_ERROR("Error: Response NULL in REPLY_REMOVE_STA.\n");
 310                 return 1;
 311         }
 312
 313         res = (struct iwl_rx_packet *)skb->data;
 314         if (res->hdr.flags & IWL_CMD_FAILED_MSK) {
 315                 IWL_ERROR("Bad return from REPLY_REMOVE_STA (0x%08X)\n",
 316                 res->hdr.flags);
 317                 return 1;
 318         }
 319
 320         switch (res->u.rem_sta.status) {
 321         case REM_STA_SUCCESS_MSK:
 322                 iwl_sta_ucode_deactivate(priv, addr);
 323                 break;
 324         default:
 325                 break;
 326         }
 327
 328         /* We didn't cache the SKB; let the caller free it */
 329         return 1;
 330 }
 331
 332 static int iwl_send_remove_station(struct iwl_priv *priv, const u8 *addr,
 333                                    u8 flags)
 334 {
 335         struct iwl_rx_packet *res = NULL;
 336         int ret;
 337
 338         struct iwl_rem_sta_cmd rm_sta_cmd;
 339
 340         struct iwl_host_cmd cmd = {
 341                 .id = REPLY_REMOVE_STA,
 342                 .len = sizeof(struct iwl_rem_sta_cmd),
 343                 .meta.flags = flags,
 344                 .data = &rm_sta_cmd,
 345         };
 346
 347         memset(&rm_sta_cmd, 0, sizeof(rm_sta_cmd));
 348         rm_sta_cmd.num_sta = 1;
 349         memcpy(&rm_sta_cmd.addr, addr , ETH_ALEN);
 350
 351         if (flags & CMD_ASYNC)
 352                 cmd.meta.u.callback = iwl_remove_sta_callback;
 353         else
 354                 cmd.meta.flags |= CMD_WANT_SKB;
 355         ret = iwl_send_cmd(priv, &cmd);
 356
 357         if (ret || (flags & CMD_ASYNC))
 358                 return ret;
 359
 360         res = (struct iwl_rx_packet *)cmd.meta.u.skb->data;
 361         if (res->hdr.flags & IWL_CMD_FAILED_MSK) {
 362                 IWL_ERROR("Bad return from REPLY_REMOVE_STA (0x%08X)\n",
 363                           res->hdr.flags);
 364                 ret = -EIO;
 365         }
 366
 367         if (!ret) {
 368                 switch (res->u.rem_sta.status) {
 369                 case REM_STA_SUCCESS_MSK:
 370                         iwl_sta_ucode_deactivate(priv, addr);
 371                         IWL_DEBUG_ASSOC("REPLY_REMOVE_STA PASSED\n");
 372                         break;
 373                 default:
 374                         ret = -EIO;
 375                         IWL_ERROR("REPLY_REMOVE_STA failed\n");
 376                         break;
 377                 }
 378         }
 379
 380         priv->alloc_rxb_skb--;
 381         dev_kfree_skb_any(cmd.meta.u.skb);
 382
 383         return ret;
 384 }
 385
 386 /**
 387  * iwl_remove_station - Remove driver's knowledge of station.
 388  */
 389 u8 iwl_remove_station(struct iwl_priv *priv, const u8 *addr, int is_ap)
 390 {
 391         int index = IWL_INVALID_STATION;
 392         int i;
 393         unsigned long flags;
 394
 395         spin_lock_irqsave(&priv->sta_lock, flags);
 396
 397         if (is_ap)
 398                 index = IWL_AP_ID;
 399         else if (is_broadcast_ether_addr(addr))
 400                 index = priv->hw_params.bcast_sta_id;
 401         else
 402                 for (i = IWL_STA_ID; i < priv->hw_params.max_stations; i++)
 403                         if (priv->stations[i].used &&
 404                             !compare_ether_addr(priv->stations[i].sta.sta.addr,
 405                                                 addr)) {
 406                                 index = i;
 407                                 break;
 408                         }
 409
 410         if (unlikely(index == IWL_INVALID_STATION))
 411                 goto out;
 412
 413         if (priv->stations[index].used) {
 414                 priv->stations[index].used = 0;
 415                 priv->num_stations--;
 416         }
 417
 418         BUG_ON(priv->num_stations < 0);
 419         spin_unlock_irqrestore(&priv->sta_lock, flags);
 420         iwl_send_remove_station(priv, addr, CMD_ASYNC);
 421         return index;
 422 out:
 423         spin_unlock_irqrestore(&priv->sta_lock, flags);
 424         return 0;
 425 }
 426 EXPORT_SYMBOL(iwl_remove_station);
 427 static int iwl_get_free_ucode_key_index(struct iwl_priv *priv)
 428 {
 429         int i;
 430
 431         for (i = 0; i < STA_KEY_MAX_NUM; i++)
 432                 if (!test_and_set_bit(i, &priv->ucode_key_table))
 433                         return i;
 434
 435         return -1;
 436 }
 437
 438 int iwl_send_static_wepkey_cmd(struct iwl_priv *priv, u8 send_if_empty)
 439 {
 440         int i, not_empty = 0;
 441         u8 buff[sizeof(struct iwl_wep_cmd) +
 442                 sizeof(struct iwl_wep_key) * WEP_KEYS_MAX];
 443         struct iwl_wep_cmd *wep_cmd = (struct iwl_wep_cmd *)buff;
 444         size_t cmd_size  = sizeof(struct iwl_wep_cmd);
 445         struct iwl_host_cmd cmd = {
 446                 .id = REPLY_WEPKEY,
 447                 .data = wep_cmd,
 448                 .meta.flags = CMD_ASYNC,
 449         };
 450
 451         memset(wep_cmd, 0, cmd_size +
 452                         (sizeof(struct iwl_wep_key) * WEP_KEYS_MAX));
 453
 454         for (i = 0; i < WEP_KEYS_MAX ; i++) {
 455                 wep_cmd->key[i].key_index = i;
 456                 if (priv->wep_keys[i].key_size) {
 457                         wep_cmd->key[i].key_offset = i;
 458                         not_empty = 1;
 459                 } else {
 460                         wep_cmd->key[i].key_offset = WEP_INVALID_OFFSET;
 461                 }
 462
 463                 wep_cmd->key[i].key_size = priv->wep_keys[i].key_size;
 464                 memcpy(&wep_cmd->key[i].key[3], priv->wep_keys[i].key,
 465                                 priv->wep_keys[i].key_size);
 466         }
 467
 468         wep_cmd->global_key_type = WEP_KEY_WEP_TYPE;
 469         wep_cmd->num_keys = WEP_KEYS_MAX;
 470
 471         cmd_size += sizeof(struct iwl_wep_key) * WEP_KEYS_MAX;
 472
 473         cmd.len = cmd_size;
 474
 475         if (not_empty || send_if_empty)
 476                 return iwl_send_cmd(priv, &cmd);
 477         else
 478                 return 0;
 479 }
 480 EXPORT_SYMBOL(iwl_send_static_wepkey_cmd);
 481
 482 int iwl_remove_default_wep_key(struct iwl_priv *priv,
 483                                struct ieee80211_key_conf *keyconf)
 484 {
 485         int ret;
 486         unsigned long flags;
 487
 488         spin_lock_irqsave(&priv->sta_lock, flags);
 489
 490         if (!test_and_clear_bit(keyconf->keyidx, &priv->ucode_key_table))
 491                 IWL_ERROR("index %d not used in uCode key table.\n",
 492                           keyconf->keyidx);
 493
 494         priv->default_wep_key--;
 495         memset(&priv->wep_keys[keyconf->keyidx], 0, sizeof(priv->wep_keys[0]));
 496         ret = iwl_send_static_wepkey_cmd(priv, 1);
 497         IWL_DEBUG_WEP("Remove default WEP key: idx=%d ret=%d\n",
 498                       keyconf->keyidx, ret);
 499         spin_unlock_irqrestore(&priv->sta_lock, flags);
 500
 501         return ret;
 502 }
 503 EXPORT_SYMBOL(iwl_remove_default_wep_key);
 504
 505 int iwl_set_default_wep_key(struct iwl_priv *priv,
 506                             struct ieee80211_key_conf *keyconf)
 507 {
 508         int ret;
 509         unsigned long flags;
 510
 511         if (keyconf->keylen != WEP_KEY_LEN_128 &&
 512             keyconf->keylen != WEP_KEY_LEN_64) {
 513                 IWL_DEBUG_WEP("Bad WEP key length %d\n", keyconf->keylen);
 514                 return -EINVAL;
 515         }
 516
 517         keyconf->flags &= ~IEEE80211_KEY_FLAG_GENERATE_IV;
 518         keyconf->hw_key_idx = HW_KEY_DEFAULT;
 519         priv->stations[IWL_AP_ID].keyinfo.alg = ALG_WEP;
 520
 521         spin_lock_irqsave(&priv->sta_lock, flags);
 522         priv->default_wep_key++;
 523
 524         if (test_and_set_bit(keyconf->keyidx, &priv->ucode_key_table))
 525                 IWL_ERROR("index %d already used in uCode key table.\n",
 526                         keyconf->keyidx);
 527
 528         priv->wep_keys[keyconf->keyidx].key_size = keyconf->keylen;
 529         memcpy(&priv->wep_keys[keyconf->keyidx].key, &keyconf->key,
 530                                                         keyconf->keylen);
 531
 532         ret = iwl_send_static_wepkey_cmd(priv, 0);
 533         IWL_DEBUG_WEP("Set default WEP key: len=%d idx=%d ret=%d\n",
 534                 keyconf->keylen, keyconf->keyidx, ret);
 535         spin_unlock_irqrestore(&priv->sta_lock, flags);
 536
 537         return ret;
 538 }
 539 EXPORT_SYMBOL(iwl_set_default_wep_key);
 540
 541 static int iwl_set_wep_dynamic_key_info(struct iwl_priv *priv,
 542                                 struct ieee80211_key_conf *keyconf,
 543                                 u8 sta_id)
 544 {
 545         unsigned long flags;
 546         __le16 key_flags = 0;
 547         int ret;
 548
 549         keyconf->flags &= ~IEEE80211_KEY_FLAG_GENERATE_IV;
 550
 551         key_flags |= (STA_KEY_FLG_WEP | STA_KEY_FLG_MAP_KEY_MSK);
 552         key_flags |= cpu_to_le16(keyconf->keyidx << STA_KEY_FLG_KEYID_POS);
 553         key_flags &= ~STA_KEY_FLG_INVALID;
 554
 555         if (keyconf->keylen == WEP_KEY_LEN_128)
 556                 key_flags |= STA_KEY_FLG_KEY_SIZE_MSK;
 557
 558         if (sta_id == priv->hw_params.bcast_sta_id)
 559                 key_flags |= STA_KEY_MULTICAST_MSK;
 560
 561         spin_lock_irqsave(&priv->sta_lock, flags);
 562
 563         priv->stations[sta_id].keyinfo.alg = keyconf->alg;
 564         priv->stations[sta_id].keyinfo.keylen = keyconf->keylen;
 565         priv->stations[sta_id].keyinfo.keyidx = keyconf->keyidx;
 566
 567         memcpy(priv->stations[sta_id].keyinfo.key,
 568                                 keyconf->key, keyconf->keylen);
 569
 570         memcpy(&priv->stations[sta_id].sta.key.key[3],
 571                                 keyconf->key, keyconf->keylen);
 572
 573         if ((priv->stations[sta_id].sta.key.key_flags & STA_KEY_FLG_ENCRYPT_MSK)
 574                         == STA_KEY_FLG_NO_ENC)
 575                 priv->stations[sta_id].sta.key.key_offset =
 576                                  iwl_get_free_ucode_key_index(priv);
 577         /* else, we are overriding an existing key => no need to allocated room
 578          * in uCode. */
 579
 580         priv->stations[sta_id].sta.key.key_flags = key_flags;
 581         priv->stations[sta_id].sta.sta.modify_mask = STA_MODIFY_KEY_MASK;
 582         priv->stations[sta_id].sta.mode = STA_CONTROL_MODIFY_MSK;
 583
 584         ret = iwl_send_add_sta(priv, &priv->stations[sta_id].sta, CMD_ASYNC);
 585
 586         spin_unlock_irqrestore(&priv->sta_lock, flags);
 587
 588         return ret;
 589 }
 590
 591 static int iwl_set_ccmp_dynamic_key_info(struct iwl_priv *priv,
 592                                    struct ieee80211_key_conf *keyconf,
 593                                    u8 sta_id)
 594 {
 595         unsigned long flags;
 596         __le16 key_flags = 0;
 597
 598         key_flags |= (STA_KEY_FLG_CCMP | STA_KEY_FLG_MAP_KEY_MSK);
 599         key_flags |= cpu_to_le16(keyconf->keyidx << STA_KEY_FLG_KEYID_POS);
 600         key_flags &= ~STA_KEY_FLG_INVALID;
 601
 602         if (sta_id == priv->hw_params.bcast_sta_id)
 603                 key_flags |= STA_KEY_MULTICAST_MSK;
 604
 605         keyconf->flags |= IEEE80211_KEY_FLAG_GENERATE_IV;
 606
 607         spin_lock_irqsave(&priv->sta_lock, flags);
 608         priv->stations[sta_id].keyinfo.alg = keyconf->alg;
 609         priv->stations[sta_id].keyinfo.keylen = keyconf->keylen;
 610
 611         memcpy(priv->stations[sta_id].keyinfo.key, keyconf->key,
 612                keyconf->keylen);
 613
 614         memcpy(priv->stations[sta_id].sta.key.key, keyconf->key,
 615                keyconf->keylen);
 616
 617         if ((priv->stations[sta_id].sta.key.key_flags & STA_KEY_FLG_ENCRYPT_MSK)
 618                         == STA_KEY_FLG_NO_ENC)
 619                 priv->stations[sta_id].sta.key.key_offset =
 620                                  iwl_get_free_ucode_key_index(priv);
 621         /* else, we are overriding an existing key => no need to allocated room
 622          * in uCode. */
 623
 624         priv->stations[sta_id].sta.key.key_flags = key_flags;
 625         priv->stations[sta_id].sta.sta.modify_mask = STA_MODIFY_KEY_MASK;
 626         priv->stations[sta_id].sta.mode = STA_CONTROL_MODIFY_MSK;
 627
 628         spin_unlock_irqrestore(&priv->sta_lock, flags);
 629
 630         IWL_DEBUG_INFO("hwcrypto: modify ucode station key info\n");
 631         return iwl_send_add_sta(priv, &priv->stations[sta_id].sta, CMD_ASYNC);
 632 }
 633
 634 static int iwl_set_tkip_dynamic_key_info(struct iwl_priv *priv,
 635                                    struct ieee80211_key_conf *keyconf,
 636                                    u8 sta_id)
 637 {
 638         unsigned long flags;
 639         int ret = 0;
 640
 641         keyconf->flags |= IEEE80211_KEY_FLAG_GENERATE_IV;
 642         keyconf->flags |= IEEE80211_KEY_FLAG_GENERATE_MMIC;
 643
 644         spin_lock_irqsave(&priv->sta_lock, flags);
 645
 646         priv->stations[sta_id].keyinfo.alg = keyconf->alg;
 647         priv->stations[sta_id].keyinfo.keylen = 16;
 648
 649         if ((priv->stations[sta_id].sta.key.key_flags & STA_KEY_FLG_ENCRYPT_MSK)
 650                         == STA_KEY_FLG_NO_ENC)
 651                 priv->stations[sta_id].sta.key.key_offset =
 652                                  iwl_get_free_ucode_key_index(priv);
 653         /* else, we are overriding an existing key => no need to allocated room
 654          * in uCode. */
 655
 656         /* This copy is acutally not needed: we get the key with each TX */
 657         memcpy(priv->stations[sta_id].keyinfo.key, keyconf->key, 16);
 658
 659         memcpy(priv->stations[sta_id].sta.key.key, keyconf->key, 16);
 660
 661         spin_unlock_irqrestore(&priv->sta_lock, flags);
 662
 663         return ret;
 664 }
 665
 666 int iwl_remove_dynamic_key(struct iwl_priv *priv,
 667                                 struct ieee80211_key_conf *keyconf,
 668                                 u8 sta_id)
 669 {
 670         unsigned long flags;
 671         int ret = 0;
 672         u16 key_flags;
 673         u8 keyidx;
 674
 675         priv->key_mapping_key--;
 676
 677         spin_lock_irqsave(&priv->sta_lock, flags);
 678         key_flags = le16_to_cpu(priv->stations[sta_id].sta.key.key_flags);
 679         keyidx = (key_flags >> STA_KEY_FLG_KEYID_POS) & 0x3;
 680
 681         IWL_DEBUG_WEP("Remove dynamic key: idx=%d sta=%d\n",
 682                       keyconf->keyidx, sta_id);
 683
 684         if (keyconf->keyidx != keyidx) {
 685                 /* We need to remove a key with index different that the one
 686                  * in the uCode. This means that the key we need to remove has
 687                  * been replaced by another one with different index.
 688                  * Don't do anything and return ok
 689                  */
 690                 spin_unlock_irqrestore(&priv->sta_lock, flags);
 691                 return 0;
 692         }
 693
 694         if (!test_and_clear_bit(priv->stations[sta_id].sta.key.key_offset,
 695                 &priv->ucode_key_table))
 696                 IWL_ERROR("index %d not used in uCode key table.\n",
 697                         priv->stations[sta_id].sta.key.key_offset);
 698         memset(&priv->stations[sta_id].keyinfo, 0,
 699                                         sizeof(struct iwl_hw_key));
 700         memset(&priv->stations[sta_id].sta.key, 0,
 701                                         sizeof(struct iwl4965_keyinfo));
 702         priv->stations[sta_id].sta.key.key_flags =
 703                         STA_KEY_FLG_NO_ENC | STA_KEY_FLG_INVALID;
 704         priv->stations[sta_id].sta.key.key_offset = WEP_INVALID_OFFSET;
 705         priv->stations[sta_id].sta.sta.modify_mask = STA_MODIFY_KEY_MASK;
 706         priv->stations[sta_id].sta.mode = STA_CONTROL_MODIFY_MSK;
 707
 708         ret =  iwl_send_add_sta(priv, &priv->stations[sta_id].sta, CMD_ASYNC);
 709         spin_unlock_irqrestore(&priv->sta_lock, flags);
 710         return ret;
 711 }
 712 EXPORT_SYMBOL(iwl_remove_dynamic_key);
 713
 714 int iwl_set_dynamic_key(struct iwl_priv *priv,
 715                                 struct ieee80211_key_conf *keyconf, u8 sta_id)
 716 {
 717         int ret;
 718
 719         priv->key_mapping_key++;
 720         keyconf->hw_key_idx = HW_KEY_DYNAMIC;
 721
 722         switch (keyconf->alg) {
 723         case ALG_CCMP:
 724                 ret = iwl_set_ccmp_dynamic_key_info(priv, keyconf, sta_id);
 725                 break;
 726         case ALG_TKIP:
 727                 ret = iwl_set_tkip_dynamic_key_info(priv, keyconf, sta_id);
 728                 break;
 729         case ALG_WEP:
 730                 ret = iwl_set_wep_dynamic_key_info(priv, keyconf, sta_id);
 731                 break;
 732         default:
 733                 IWL_ERROR("Unknown alg: %s alg = %d\n", __func__, keyconf->alg);
 734                 ret = -EINVAL;
 735         }
 736
 737         IWL_DEBUG_WEP("Set dynamic key: alg= %d len=%d idx=%d sta=%d ret=%d\n",
 738                       keyconf->alg, keyconf->keylen, keyconf->keyidx,
 739                       sta_id, ret);
 740
 741         return ret;
 742 }
 743 EXPORT_SYMBOL(iwl_set_dynamic_key);
 744
 745 #ifdef CONFIG_IWLWIFI_DEBUG
 746 static void iwl_dump_lq_cmd(struct iwl_priv *priv,
 747                            struct iwl_link_quality_cmd *lq)
 748 {
 749         int i;
 750         IWL_DEBUG_RATE("lq station id 0x%x\n", lq->sta_id);
 751         IWL_DEBUG_RATE("lq dta 0x%X 0x%X\n",
 752                        lq->general_params.single_stream_ant_msk,
 753                        lq->general_params.dual_stream_ant_msk);
 754
 755         for (i = 0; i < LINK_QUAL_MAX_RETRY_NUM; i++)
 756                 IWL_DEBUG_RATE("lq index %d 0x%X\n",
 757                                i, lq->rs_table[i].rate_n_flags);
 758 }
 759 #else
 760 static inline void iwl_dump_lq_cmd(struct iwl_priv *priv,
 761                                    struct iwl_link_quality_cmd *lq)
 762 {
 763 }
 764 #endif
 765
 766 int iwl_send_lq_cmd(struct iwl_priv *priv,
 767                     struct iwl_link_quality_cmd *lq, u8 flags)
 768 {
 769         struct iwl_host_cmd cmd = {
 770                 .id = REPLY_TX_LINK_QUALITY_CMD,
 771                 .len = sizeof(struct iwl_link_quality_cmd),
 772                 .meta.flags = flags,
 773                 .data = lq,
 774         };
 775
 776         if ((lq->sta_id == 0xFF) &&
 777             (priv->iw_mode == IEEE80211_IF_TYPE_IBSS))
 778                 return -EINVAL;
 779
 780         if (lq->sta_id == 0xFF)
 781                 lq->sta_id = IWL_AP_ID;
 782
 783         iwl_dump_lq_cmd(priv,lq);
 784
 785         if (iwl_is_associated(priv) && priv->assoc_station_added &&
 786             priv->lq_mngr.lq_ready)
 787                 return  iwl_send_cmd(priv, &cmd);
 788
 789         return 0;
 790 }
 791 EXPORT_SYMBOL(iwl_send_lq_cmd);
 792
 793 /**
 794  * iwl_sta_init_lq - Initialize a station's hardware rate table
 795  *
 796  * The uCode's station table contains a table of fallback rates
 797  * for automatic fallback during transmission.
 798  *
 799  * NOTE: This sets up a default set of values.  These will be replaced later
 800  *       if the driver's iwl-4965-rs rate scaling algorithm is used, instead of
 801  *       rc80211_simple.
 802  *
 803  * NOTE: Run REPLY_ADD_STA command to set up station table entry, before
 804  *       calling this function (which runs REPLY_TX_LINK_QUALITY_CMD,
 805  *       which requires station table entry to exist).
 806  */
 807 static void iwl_sta_init_lq(struct iwl_priv *priv, const u8 *addr, int is_ap)
 808 {
 809         int i, r;
 810         struct iwl_link_quality_cmd link_cmd = {
 811                 .reserved1 = 0,
 812         };
 813         u16 rate_flags;
 814
 815         /* Set up the rate scaling to start at selected rate, fall back
 816          * all the way down to 1M in IEEE order, and then spin on 1M */
 817         if (is_ap)
 818                 r = IWL_RATE_54M_INDEX;
 819         else if (priv->band == IEEE80211_BAND_5GHZ)
 820                 r = IWL_RATE_6M_INDEX;
 821         else
 822                 r = IWL_RATE_1M_INDEX;
 823
 824         for (i = 0; i < LINK_QUAL_MAX_RETRY_NUM; i++) {
 825                 rate_flags = 0;
 826                 if (r >= IWL_FIRST_CCK_RATE && r <= IWL_LAST_CCK_RATE)
 827                         rate_flags |= RATE_MCS_CCK_MSK;
 828
 829                 /* Use Tx antenna B only */
 830                 rate_flags |= RATE_MCS_ANT_B_MSK; /*FIXME:RS*/
 831
 832                 link_cmd.rs_table[i].rate_n_flags =
 833                         iwl_hw_set_rate_n_flags(iwl_rates[r].plcp, rate_flags);
 834                 r = iwl4965_get_prev_ieee_rate(r);
 835         }
 836
 837         link_cmd.general_params.single_stream_ant_msk = 2;
 838         link_cmd.general_params.dual_stream_ant_msk = 3;
 839         link_cmd.agg_params.agg_dis_start_th = 3;
 840         link_cmd.agg_params.agg_time_limit = cpu_to_le16(4000);
 841
 842         /* Update the rate scaling for control frame Tx to AP */
 843         link_cmd.sta_id = is_ap ? IWL_AP_ID : priv->hw_params.bcast_sta_id;
 844
 845         iwl_send_cmd_pdu_async(priv, REPLY_TX_LINK_QUALITY_CMD,
 846                                sizeof(link_cmd), &link_cmd, NULL);
 847 }
 848 /**
 849  * iwl_rxon_add_station - add station into station table.
 850  *
 851  * there is only one AP station with id= IWL_AP_ID
 852  * NOTE: mutex must be held before calling this fnction
 853  */
 854 int iwl_rxon_add_station(struct iwl_priv *priv, const u8 *addr, int is_ap)
 855 {
 856         u8 sta_id;
 857
 858         /* Add station to device's station table */
 859         struct ieee80211_conf *conf = &priv->hw->conf;
 860         struct ieee80211_ht_info *cur_ht_config = &conf->ht_conf;
 861
 862         if ((is_ap) &&
 863             (conf->flags & IEEE80211_CONF_SUPPORT_HT_MODE) &&
 864             (priv->iw_mode == IEEE80211_IF_TYPE_STA))
 865                 sta_id = iwl_add_station_flags(priv, addr, is_ap,
 866                                                    0, cur_ht_config);
 867         else
 868                 sta_id = iwl_add_station_flags(priv, addr, is_ap,
 869                                                    0, NULL);
 870
 871         /* Set up default rate scaling table in device's station table */
 872         iwl_sta_init_lq(priv, addr, is_ap);
 873
 874         return sta_id;
 875 }
 876 EXPORT_SYMBOL(iwl_rxon_add_station);
 877
 878 /**
 879  * iwl_get_sta_id - Find station's index within station table
 880  *
 881  * If new IBSS station, create new entry in station table
 882  */
 883 int iwl_get_sta_id(struct iwl_priv *priv, struct ieee80211_hdr *hdr)
 884 {
 885         int sta_id;
 886         u16 fc = le16_to_cpu(hdr->frame_control);
 887         DECLARE_MAC_BUF(mac);
 888
 889         /* If this frame is broadcast or management, use broadcast station id */
 890         if (((fc & IEEE80211_FCTL_FTYPE) != IEEE80211_FTYPE_DATA) ||
 891             is_multicast_ether_addr(hdr->addr1))
 892                 return priv->hw_params.bcast_sta_id;
 893
 894         switch (priv->iw_mode) {
 895
 896         /* If we are a client station in a BSS network, use the special
 897          * AP station entry (that's the only station we communicate with) */
 898         case IEEE80211_IF_TYPE_STA:
 899                 return IWL_AP_ID;
 900
 901         /* If we are an AP, then find the station, or use BCAST */
 902         case IEEE80211_IF_TYPE_AP:
 903                 sta_id = iwl_find_station(priv, hdr->addr1);
 904                 if (sta_id != IWL_INVALID_STATION)
 905                         return sta_id;
 906                 return priv->hw_params.bcast_sta_id;
 907
 908         /* If this frame is going out to an IBSS network, find the station,
 909          * or create a new station table entry */
 910         case IEEE80211_IF_TYPE_IBSS:
 911                 sta_id = iwl_find_station(priv, hdr->addr1);
 912                 if (sta_id != IWL_INVALID_STATION)
 913                         return sta_id;
 914
 915                 /* Create new station table entry */
 916                 sta_id = iwl_add_station_flags(priv, hdr->addr1,
 917                                                    0, CMD_ASYNC, NULL);
 918
 919                 if (sta_id != IWL_INVALID_STATION)
 920                         return sta_id;
 921
 922                 IWL_DEBUG_DROP("Station %s not in station map. "
 923                                "Defaulting to broadcast...\n",
 924                                print_mac(mac, hdr->addr1));
 925                 iwl_print_hex_dump(priv, IWL_DL_DROP, (u8 *) hdr, sizeof(*hdr));
 926                 return priv->hw_params.bcast_sta_id;
 927
 928         default:
 929                 IWL_WARNING("Unknown mode of operation: %d", priv->iw_mode);
 930                 return priv->hw_params.bcast_sta_id;
 931         }
 932 }
 933 EXPORT_SYMBOL(iwl_get_sta_id);
 934
 935 /**
 936  * iwl_sta_modify_enable_tid_tx - Enable Tx for this TID in station table
 937  */
 938 void iwl_sta_modify_enable_tid_tx(struct iwl_priv *priv, int sta_id, int tid)
 939 {
 940         unsigned long flags;
 941
 942         /* Remove "disable" flag, to enable Tx for this TID */
 943         spin_lock_irqsave(&priv->sta_lock, flags);
 944         priv->stations[sta_id].sta.sta.modify_mask = STA_MODIFY_TID_DISABLE_TX;
 945         priv->stations[sta_id].sta.tid_disable_tx &= cpu_to_le16(~(1 << tid));
 946         priv->stations[sta_id].sta.mode = STA_CONTROL_MODIFY_MSK;
 947         spin_unlock_irqrestore(&priv->sta_lock, flags);
 948
 949         iwl_send_add_sta(priv, &priv->stations[sta_id].sta, CMD_ASYNC);
 950 }
 951 EXPORT_SYMBOL(iwl_sta_modify_enable_tid_tx);
 952