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-eeprom.h"
  34 #include "iwl-dev.h"
  35 #include "iwl-core.h"
  36 #include "iwl-sta.h"
  37 #include "iwl-io.h"
  38 #include "iwl-helpers.h"
  39
  40 u8 iwl_find_station(struct iwl_priv *priv, const u8 *addr)
  41 {
  42         int i;
  43         int start = 0;
  44         int ret = IWL_INVALID_STATION;
  45         unsigned long flags;
  46         DECLARE_MAC_BUF(mac);
  47
  48         if ((priv->iw_mode == IEEE80211_IF_TYPE_IBSS) ||
  49             (priv->iw_mode == IEEE80211_IF_TYPE_AP))
  50                 start = IWL_STA_ID;
  51
  52         if (is_broadcast_ether_addr(addr))
  53                 return priv->hw_params.bcast_sta_id;
  54
  55         spin_lock_irqsave(&priv->sta_lock, flags);
  56         for (i = start; i < priv->hw_params.max_stations; i++)
  57                 if (priv->stations[i].used &&
  58                     (!compare_ether_addr(priv->stations[i].sta.sta.addr,
  59                                          addr))) {
  60                         ret = i;
  61                         goto out;
  62                 }
  63
  64         IWL_DEBUG_ASSOC_LIMIT("can not find STA %s total %d\n",
  65                               print_mac(mac, addr), priv->num_stations);
  66
  67  out:
  68         spin_unlock_irqrestore(&priv->sta_lock, flags);
  69         return ret;
  70 }
  71 EXPORT_SYMBOL(iwl_find_station);
  72
  73 int iwl_send_add_sta(struct iwl_priv *priv,
  74                      struct iwl_addsta_cmd *sta, u8 flags)
  75 {
  76         struct iwl_rx_packet *res = NULL;
  77         int ret = 0;
  78         u8 data[sizeof(*sta)];
  79         struct iwl_host_cmd cmd = {
  80                 .id = REPLY_ADD_STA,
  81                 .meta.flags = flags,
  82                 .data = data,
  83         };
  84
  85         if (!(flags & CMD_ASYNC))
  86                 cmd.meta.flags |= CMD_WANT_SKB;
  87
  88         cmd.len = priv->cfg->ops->utils->build_addsta_hcmd(sta, data);
  89         ret = iwl_send_cmd(priv, &cmd);
  90
  91         if (ret || (flags & CMD_ASYNC))
  92                 return ret;
  93
  94         res = (struct iwl_rx_packet *)cmd.meta.u.skb->data;
  95         if (res->hdr.flags & IWL_CMD_FAILED_MSK) {
  96                 IWL_ERROR("Bad return from REPLY_ADD_STA (0x%08X)\n",
  97                           res->hdr.flags);
  98                 ret = -EIO;
  99         }
 100
 101         if (ret == 0) {
 102                 switch (res->u.add_sta.status) {
 103                 case ADD_STA_SUCCESS_MSK:
 104                         IWL_DEBUG_INFO("REPLY_ADD_STA PASSED\n");
 105                         break;
 106                 default:
 107                         ret = -EIO;
 108                         IWL_WARNING("REPLY_ADD_STA failed\n");
 109                         break;
 110                 }
 111         }
 112
 113         priv->alloc_rxb_skb--;
 114         dev_kfree_skb_any(cmd.meta.u.skb);
 115
 116         return ret;
 117 }
 118 EXPORT_SYMBOL(iwl_send_add_sta);
 119
 120 #ifdef CONFIG_IWL4965_HT
 121
 122 static void iwl_set_ht_add_station(struct iwl_priv *priv, u8 index,
 123                                    struct ieee80211_ht_info *sta_ht_inf)
 124 {
 125         __le32 sta_flags;
 126         u8 mimo_ps_mode;
 127
 128         if (!sta_ht_inf || !sta_ht_inf->ht_supported)
 129                 goto done;
 130
 131         mimo_ps_mode = (sta_ht_inf->cap & IEEE80211_HT_CAP_MIMO_PS) >> 2;
 132
 133         sta_flags = priv->stations[index].sta.station_flags;
 134
 135         sta_flags &= ~(STA_FLG_RTS_MIMO_PROT_MSK | STA_FLG_MIMO_DIS_MSK);
 136
 137         switch (mimo_ps_mode) {
 138         case WLAN_HT_CAP_MIMO_PS_STATIC:
 139                 sta_flags |= STA_FLG_MIMO_DIS_MSK;
 140                 break;
 141         case WLAN_HT_CAP_MIMO_PS_DYNAMIC:
 142                 sta_flags |= STA_FLG_RTS_MIMO_PROT_MSK;
 143                 break;
 144         case WLAN_HT_CAP_MIMO_PS_DISABLED:
 145                 break;
 146         default:
 147                 IWL_WARNING("Invalid MIMO PS mode %d", mimo_ps_mode);
 148                 break;
 149         }
 150
 151         sta_flags |= cpu_to_le32(
 152               (u32)sta_ht_inf->ampdu_factor << STA_FLG_MAX_AGG_SIZE_POS);
 153
 154         sta_flags |= cpu_to_le32(
 155               (u32)sta_ht_inf->ampdu_density << STA_FLG_AGG_MPDU_DENSITY_POS);
 156
 157         if (iwl_is_fat_tx_allowed(priv, sta_ht_inf))
 158                 sta_flags |= STA_FLG_FAT_EN_MSK;
 159         else
 160                 sta_flags &= ~STA_FLG_FAT_EN_MSK;
 161
 162         priv->stations[index].sta.station_flags = sta_flags;
 163  done:
 164         return;
 165 }
 166 #else
 167 static inline void iwl_set_ht_add_station(struct iwl_priv *priv, u8 index,
 168                                         struct ieee80211_ht_info *sta_ht_info)
 169 {
 170 }
 171 #endif
 172
 173 /**
 174  * iwl_add_station_flags - Add station to tables in driver and device
 175  */
 176 u8 iwl_add_station_flags(struct iwl_priv *priv, const u8 *addr, int is_ap,
 177                          u8 flags, struct ieee80211_ht_info *ht_info)
 178 {
 179         int i;
 180         int index = IWL_INVALID_STATION;
 181         struct iwl_station_entry *station;
 182         unsigned long flags_spin;
 183         DECLARE_MAC_BUF(mac);
 184
 185         spin_lock_irqsave(&priv->sta_lock, flags_spin);
 186         if (is_ap)
 187                 index = IWL_AP_ID;
 188         else if (is_broadcast_ether_addr(addr))
 189                 index = priv->hw_params.bcast_sta_id;
 190         else
 191                 for (i = IWL_STA_ID; i < priv->hw_params.max_stations; i++) {
 192                         if (!compare_ether_addr(priv->stations[i].sta.sta.addr,
 193                                                 addr)) {
 194                                 index = i;
 195                                 break;
 196                         }
 197
 198                         if (!priv->stations[i].used &&
 199                             index == IWL_INVALID_STATION)
 200                                 index = i;
 201                 }
 202
 203
 204         /* These two conditions have the same outcome, but keep them separate
 205           since they have different meanings */
 206         if (unlikely(index == IWL_INVALID_STATION)) {
 207                 spin_unlock_irqrestore(&priv->sta_lock, flags_spin);
 208                 return index;
 209         }
 210
 211         if (priv->stations[index].used &&
 212             !compare_ether_addr(priv->stations[index].sta.sta.addr, addr)) {
 213                 spin_unlock_irqrestore(&priv->sta_lock, flags_spin);
 214                 return index;
 215         }
 216
 217
 218         IWL_DEBUG_ASSOC("Add STA ID %d: %s\n", index, print_mac(mac, addr));
 219         station = &priv->stations[index];
 220         station->used = 1;
 221         priv->num_stations++;
 222
 223         /* Set up the REPLY_ADD_STA command to send to device */
 224         memset(&station->sta, 0, sizeof(struct iwl_addsta_cmd));
 225         memcpy(station->sta.sta.addr, addr, ETH_ALEN);
 226         station->sta.mode = 0;
 227         station->sta.sta.sta_id = index;
 228         station->sta.station_flags = 0;
 229
 230         /* BCAST station and IBSS stations do not work in HT mode */
 231         if (index != priv->hw_params.bcast_sta_id &&
 232             priv->iw_mode != IEEE80211_IF_TYPE_IBSS)
 233                 iwl_set_ht_add_station(priv, index, ht_info);
 234
 235         spin_unlock_irqrestore(&priv->sta_lock, flags_spin);
 236
 237         /* Add station to device's station table */
 238         iwl_send_add_sta(priv, &station->sta, flags);
 239         return index;
 240
 241 }
 242 EXPORT_SYMBOL(iwl_add_station_flags);
 243
 244 int iwl_get_free_ucode_key_index(struct iwl_priv *priv)
 245 {
 246         int i;
 247
 248         for (i = 0; i < STA_KEY_MAX_NUM; i++)
 249                 if (!test_and_set_bit(i, &priv->ucode_key_table))
 250                         return i;
 251
 252         return -1;
 253 }
 254
 255 int iwl_send_static_wepkey_cmd(struct iwl_priv *priv, u8 send_if_empty)
 256 {
 257         int i, not_empty = 0;
 258         u8 buff[sizeof(struct iwl_wep_cmd) +
 259                 sizeof(struct iwl_wep_key) * WEP_KEYS_MAX];
 260         struct iwl_wep_cmd *wep_cmd = (struct iwl_wep_cmd *)buff;
 261         size_t cmd_size  = sizeof(struct iwl_wep_cmd);
 262         struct iwl_host_cmd cmd = {
 263                 .id = REPLY_WEPKEY,
 264                 .data = wep_cmd,
 265                 .meta.flags = CMD_ASYNC,
 266         };
 267
 268         memset(wep_cmd, 0, cmd_size +
 269                         (sizeof(struct iwl_wep_key) * WEP_KEYS_MAX));
 270
 271         for (i = 0; i < WEP_KEYS_MAX ; i++) {
 272                 wep_cmd->key[i].key_index = i;
 273                 if (priv->wep_keys[i].key_size) {
 274                         wep_cmd->key[i].key_offset = i;
 275                         not_empty = 1;
 276                 } else {
 277                         wep_cmd->key[i].key_offset = WEP_INVALID_OFFSET;
 278                 }
 279
 280                 wep_cmd->key[i].key_size = priv->wep_keys[i].key_size;
 281                 memcpy(&wep_cmd->key[i].key[3], priv->wep_keys[i].key,
 282                                 priv->wep_keys[i].key_size);
 283         }
 284
 285         wep_cmd->global_key_type = WEP_KEY_WEP_TYPE;
 286         wep_cmd->num_keys = WEP_KEYS_MAX;
 287
 288         cmd_size += sizeof(struct iwl_wep_key) * WEP_KEYS_MAX;
 289
 290         cmd.len = cmd_size;
 291
 292         if (not_empty || send_if_empty)
 293                 return iwl_send_cmd(priv, &cmd);
 294         else
 295                 return 0;
 296 }
 297 EXPORT_SYMBOL(iwl_send_static_wepkey_cmd);
 298
 299 int iwl_remove_default_wep_key(struct iwl_priv *priv,
 300                                struct ieee80211_key_conf *keyconf)
 301 {
 302         int ret;
 303         unsigned long flags;
 304
 305         spin_lock_irqsave(&priv->sta_lock, flags);
 306
 307         if (!test_and_clear_bit(keyconf->keyidx, &priv->ucode_key_table))
 308                 IWL_ERROR("index %d not used in uCode key table.\n",
 309                           keyconf->keyidx);
 310
 311         priv->default_wep_key--;
 312         memset(&priv->wep_keys[keyconf->keyidx], 0, sizeof(priv->wep_keys[0]));
 313         ret = iwl_send_static_wepkey_cmd(priv, 1);
 314         spin_unlock_irqrestore(&priv->sta_lock, flags);
 315
 316         return ret;
 317 }
 318 EXPORT_SYMBOL(iwl_remove_default_wep_key);
 319
 320 int iwl_set_default_wep_key(struct iwl_priv *priv,
 321                             struct ieee80211_key_conf *keyconf)
 322 {
 323         int ret;
 324         unsigned long flags;
 325
 326         keyconf->flags &= ~IEEE80211_KEY_FLAG_GENERATE_IV;
 327         keyconf->hw_key_idx = HW_KEY_DEFAULT;
 328         priv->stations[IWL_AP_ID].keyinfo.alg = ALG_WEP;
 329
 330         spin_lock_irqsave(&priv->sta_lock, flags);
 331         priv->default_wep_key++;
 332
 333         if (test_and_set_bit(keyconf->keyidx, &priv->ucode_key_table))
 334                 IWL_ERROR("index %d already used in uCode key table.\n",
 335                         keyconf->keyidx);
 336
 337         priv->wep_keys[keyconf->keyidx].key_size = keyconf->keylen;
 338         memcpy(&priv->wep_keys[keyconf->keyidx].key, &keyconf->key,
 339                                                         keyconf->keylen);
 340
 341         ret = iwl_send_static_wepkey_cmd(priv, 0);
 342         spin_unlock_irqrestore(&priv->sta_lock, flags);
 343
 344         return ret;
 345 }
 346 EXPORT_SYMBOL(iwl_set_default_wep_key);
 347
 348 static int iwl_set_wep_dynamic_key_info(struct iwl_priv *priv,
 349                                 struct ieee80211_key_conf *keyconf,
 350                                 u8 sta_id)
 351 {
 352         unsigned long flags;
 353         __le16 key_flags = 0;
 354         int ret;
 355
 356         keyconf->flags &= ~IEEE80211_KEY_FLAG_GENERATE_IV;
 357
 358         key_flags |= (STA_KEY_FLG_WEP | STA_KEY_FLG_MAP_KEY_MSK);
 359         key_flags |= cpu_to_le16(keyconf->keyidx << STA_KEY_FLG_KEYID_POS);
 360         key_flags &= ~STA_KEY_FLG_INVALID;
 361
 362         if (keyconf->keylen == WEP_KEY_LEN_128)
 363                 key_flags |= STA_KEY_FLG_KEY_SIZE_MSK;
 364
 365         if (sta_id == priv->hw_params.bcast_sta_id)
 366                 key_flags |= STA_KEY_MULTICAST_MSK;
 367
 368         spin_lock_irqsave(&priv->sta_lock, flags);
 369
 370         priv->stations[sta_id].keyinfo.alg = keyconf->alg;
 371         priv->stations[sta_id].keyinfo.keylen = keyconf->keylen;
 372         priv->stations[sta_id].keyinfo.keyidx = keyconf->keyidx;
 373
 374         memcpy(priv->stations[sta_id].keyinfo.key,
 375                                 keyconf->key, keyconf->keylen);
 376
 377         memcpy(&priv->stations[sta_id].sta.key.key[3],
 378                                 keyconf->key, keyconf->keylen);
 379
 380         if ((priv->stations[sta_id].sta.key.key_flags & STA_KEY_FLG_ENCRYPT_MSK)
 381                         == STA_KEY_FLG_NO_ENC)
 382                 priv->stations[sta_id].sta.key.key_offset =
 383                                  iwl_get_free_ucode_key_index(priv);
 384         /* else, we are overriding an existing key => no need to allocated room
 385          * in uCode. */
 386
 387         priv->stations[sta_id].sta.key.key_flags = key_flags;
 388         priv->stations[sta_id].sta.sta.modify_mask = STA_MODIFY_KEY_MASK;
 389         priv->stations[sta_id].sta.mode = STA_CONTROL_MODIFY_MSK;
 390
 391         ret = iwl_send_add_sta(priv, &priv->stations[sta_id].sta, CMD_ASYNC);
 392
 393         spin_unlock_irqrestore(&priv->sta_lock, flags);
 394
 395         return ret;
 396 }
 397
 398 static int iwl_set_ccmp_dynamic_key_info(struct iwl_priv *priv,
 399                                    struct ieee80211_key_conf *keyconf,
 400                                    u8 sta_id)
 401 {
 402         unsigned long flags;
 403         __le16 key_flags = 0;
 404
 405         key_flags |= (STA_KEY_FLG_CCMP | STA_KEY_FLG_MAP_KEY_MSK);
 406         key_flags |= cpu_to_le16(keyconf->keyidx << STA_KEY_FLG_KEYID_POS);
 407         key_flags &= ~STA_KEY_FLG_INVALID;
 408
 409         if (sta_id == priv->hw_params.bcast_sta_id)
 410                 key_flags |= STA_KEY_MULTICAST_MSK;
 411
 412         keyconf->flags |= IEEE80211_KEY_FLAG_GENERATE_IV;
 413
 414         spin_lock_irqsave(&priv->sta_lock, flags);
 415         priv->stations[sta_id].keyinfo.alg = keyconf->alg;
 416         priv->stations[sta_id].keyinfo.keylen = keyconf->keylen;
 417
 418         memcpy(priv->stations[sta_id].keyinfo.key, keyconf->key,
 419                keyconf->keylen);
 420
 421         memcpy(priv->stations[sta_id].sta.key.key, keyconf->key,
 422                keyconf->keylen);
 423
 424         if ((priv->stations[sta_id].sta.key.key_flags & STA_KEY_FLG_ENCRYPT_MSK)
 425                         == STA_KEY_FLG_NO_ENC)
 426                 priv->stations[sta_id].sta.key.key_offset =
 427                                  iwl_get_free_ucode_key_index(priv);
 428         /* else, we are overriding an existing key => no need to allocated room
 429          * in uCode. */
 430
 431         priv->stations[sta_id].sta.key.key_flags = key_flags;
 432         priv->stations[sta_id].sta.sta.modify_mask = STA_MODIFY_KEY_MASK;
 433         priv->stations[sta_id].sta.mode = STA_CONTROL_MODIFY_MSK;
 434
 435         spin_unlock_irqrestore(&priv->sta_lock, flags);
 436
 437         IWL_DEBUG_INFO("hwcrypto: modify ucode station key info\n");
 438         return iwl_send_add_sta(priv, &priv->stations[sta_id].sta, CMD_ASYNC);
 439 }
 440
 441 static int iwl_set_tkip_dynamic_key_info(struct iwl_priv *priv,
 442                                    struct ieee80211_key_conf *keyconf,
 443                                    u8 sta_id)
 444 {
 445         unsigned long flags;
 446         int ret = 0;
 447
 448         keyconf->flags |= IEEE80211_KEY_FLAG_GENERATE_IV;
 449         keyconf->flags |= IEEE80211_KEY_FLAG_GENERATE_MMIC;
 450
 451         spin_lock_irqsave(&priv->sta_lock, flags);
 452
 453         priv->stations[sta_id].keyinfo.alg = keyconf->alg;
 454         priv->stations[sta_id].keyinfo.keylen = 16;
 455
 456         if ((priv->stations[sta_id].sta.key.key_flags & STA_KEY_FLG_ENCRYPT_MSK)
 457                         == STA_KEY_FLG_NO_ENC)
 458                 priv->stations[sta_id].sta.key.key_offset =
 459                                  iwl_get_free_ucode_key_index(priv);
 460         /* else, we are overriding an existing key => no need to allocated room
 461          * in uCode. */
 462
 463         /* This copy is acutally not needed: we get the key with each TX */
 464         memcpy(priv->stations[sta_id].keyinfo.key, keyconf->key, 16);
 465
 466         memcpy(priv->stations[sta_id].sta.key.key, keyconf->key, 16);
 467
 468         spin_unlock_irqrestore(&priv->sta_lock, flags);
 469
 470         return ret;
 471 }
 472
 473 int iwl_remove_dynamic_key(struct iwl_priv *priv,
 474                                 struct ieee80211_key_conf *keyconf,
 475                                 u8 sta_id)
 476 {
 477         unsigned long flags;
 478         int ret = 0;
 479         u16 key_flags;
 480         u8 keyidx;
 481
 482         priv->key_mapping_key--;
 483
 484         spin_lock_irqsave(&priv->sta_lock, flags);
 485         key_flags = le16_to_cpu(priv->stations[sta_id].sta.key.key_flags);
 486         keyidx = (key_flags >> STA_KEY_FLG_KEYID_POS) & 0x3;
 487
 488         if (keyconf->keyidx != keyidx) {
 489                 /* We need to remove a key with index different that the one
 490                  * in the uCode. This means that the key we need to remove has
 491                  * been replaced by another one with different index.
 492                  * Don't do anything and return ok
 493                  */
 494                 spin_unlock_irqrestore(&priv->sta_lock, flags);
 495                 return 0;
 496         }
 497
 498         if (!test_and_clear_bit(priv->stations[sta_id].sta.key.key_offset,
 499                 &priv->ucode_key_table))
 500                 IWL_ERROR("index %d not used in uCode key table.\n",
 501                         priv->stations[sta_id].sta.key.key_offset);
 502         memset(&priv->stations[sta_id].keyinfo, 0,
 503                                         sizeof(struct iwl_hw_key));
 504         memset(&priv->stations[sta_id].sta.key, 0,
 505                                         sizeof(struct iwl4965_keyinfo));
 506         priv->stations[sta_id].sta.key.key_flags =
 507                         STA_KEY_FLG_NO_ENC | STA_KEY_FLG_INVALID;
 508         priv->stations[sta_id].sta.key.key_offset = WEP_INVALID_OFFSET;
 509         priv->stations[sta_id].sta.sta.modify_mask = STA_MODIFY_KEY_MASK;
 510         priv->stations[sta_id].sta.mode = STA_CONTROL_MODIFY_MSK;
 511
 512         IWL_DEBUG_INFO("hwcrypto: clear ucode station key info\n");
 513         ret =  iwl_send_add_sta(priv, &priv->stations[sta_id].sta, CMD_ASYNC);
 514         spin_unlock_irqrestore(&priv->sta_lock, flags);
 515         return ret;
 516 }
 517 EXPORT_SYMBOL(iwl_remove_dynamic_key);
 518
 519 int iwl_set_dynamic_key(struct iwl_priv *priv,
 520                                 struct ieee80211_key_conf *keyconf, u8 sta_id)
 521 {
 522         int ret;
 523
 524         priv->key_mapping_key++;
 525         keyconf->hw_key_idx = HW_KEY_DYNAMIC;
 526
 527         switch (keyconf->alg) {
 528         case ALG_CCMP:
 529                 ret = iwl_set_ccmp_dynamic_key_info(priv, keyconf, sta_id);
 530                 break;
 531         case ALG_TKIP:
 532                 ret = iwl_set_tkip_dynamic_key_info(priv, keyconf, sta_id);
 533                 break;
 534         case ALG_WEP:
 535                 ret = iwl_set_wep_dynamic_key_info(priv, keyconf, sta_id);
 536                 break;
 537         default:
 538                 IWL_ERROR("Unknown alg: %s alg = %d\n", __func__, keyconf->alg);
 539                 ret = -EINVAL;
 540         }
 541
 542         return ret;
 543 }
 544 EXPORT_SYMBOL(iwl_set_dynamic_key);
 545
 546 #ifdef CONFIG_IWLWIFI_DEBUG
 547 static void iwl_dump_lq_cmd(struct iwl_priv *priv,
 548                            struct iwl_link_quality_cmd *lq)
 549 {
 550         int i;
 551         IWL_DEBUG_RATE("lq station id 0x%x\n", lq->sta_id);
 552         IWL_DEBUG_RATE("lq dta 0x%X 0x%X\n",
 553                        lq->general_params.single_stream_ant_msk,
 554                        lq->general_params.dual_stream_ant_msk);
 555
 556         for (i = 0; i < LINK_QUAL_MAX_RETRY_NUM; i++)
 557                 IWL_DEBUG_RATE("lq index %d 0x%X\n",
 558                                i, lq->rs_table[i].rate_n_flags);
 559 }
 560 #else
 561 static inline void iwl_dump_lq_cmd(struct iwl_priv *priv,
 562                                    struct iwl_link_quality_cmd *lq)
 563 {
 564 }
 565 #endif
 566
 567 int iwl_send_lq_cmd(struct iwl_priv *priv,
 568                     struct iwl_link_quality_cmd *lq, u8 flags)
 569 {
 570         struct iwl_host_cmd cmd = {
 571                 .id = REPLY_TX_LINK_QUALITY_CMD,
 572                 .len = sizeof(struct iwl_link_quality_cmd),
 573                 .meta.flags = flags,
 574                 .data = lq,
 575         };
 576
 577         if ((lq->sta_id == 0xFF) &&
 578             (priv->iw_mode == IEEE80211_IF_TYPE_IBSS))
 579                 return -EINVAL;
 580
 581         if (lq->sta_id == 0xFF)
 582                 lq->sta_id = IWL_AP_ID;
 583
 584         iwl_dump_lq_cmd(priv,lq);
 585
 586         if (iwl_is_associated(priv) && priv->assoc_station_added &&
 587             priv->lq_mngr.lq_ready)
 588                 return  iwl_send_cmd(priv, &cmd);
 589
 590         return 0;
 591 }
 592 EXPORT_SYMBOL(iwl_send_lq_cmd);
 593
 594 /**
 595  * iwl_sta_init_lq - Initialize a station's hardware rate table
 596  *
 597  * The uCode's station table contains a table of fallback rates
 598  * for automatic fallback during transmission.
 599  *
 600  * NOTE: This sets up a default set of values.  These will be replaced later
 601  *       if the driver's iwl-4965-rs rate scaling algorithm is used, instead of
 602  *       rc80211_simple.
 603  *
 604  * NOTE: Run REPLY_ADD_STA command to set up station table entry, before
 605  *       calling this function (which runs REPLY_TX_LINK_QUALITY_CMD,
 606  *       which requires station table entry to exist).
 607  */
 608 static void iwl_sta_init_lq(struct iwl_priv *priv, const u8 *addr, int is_ap)
 609 {
 610         int i, r;
 611         struct iwl_link_quality_cmd link_cmd = {
 612                 .reserved1 = 0,
 613         };
 614         u16 rate_flags;
 615
 616         /* Set up the rate scaling to start at selected rate, fall back
 617          * all the way down to 1M in IEEE order, and then spin on 1M */
 618         if (is_ap)
 619                 r = IWL_RATE_54M_INDEX;
 620         else if (priv->band == IEEE80211_BAND_5GHZ)
 621                 r = IWL_RATE_6M_INDEX;
 622         else
 623                 r = IWL_RATE_1M_INDEX;
 624
 625         for (i = 0; i < LINK_QUAL_MAX_RETRY_NUM; i++) {
 626                 rate_flags = 0;
 627                 if (r >= IWL_FIRST_CCK_RATE && r <= IWL_LAST_CCK_RATE)
 628                         rate_flags |= RATE_MCS_CCK_MSK;
 629
 630                 /* Use Tx antenna B only */
 631                 rate_flags |= RATE_MCS_ANT_B_MSK; /*FIXME:RS*/
 632
 633                 link_cmd.rs_table[i].rate_n_flags =
 634                         iwl4965_hw_set_rate_n_flags(iwl_rates[r].plcp, rate_flags);
 635                 r = iwl4965_get_prev_ieee_rate(r);
 636         }
 637
 638         link_cmd.general_params.single_stream_ant_msk = 2;
 639         link_cmd.general_params.dual_stream_ant_msk = 3;
 640         link_cmd.agg_params.agg_dis_start_th = 3;
 641         link_cmd.agg_params.agg_time_limit = cpu_to_le16(4000);
 642
 643         /* Update the rate scaling for control frame Tx to AP */
 644         link_cmd.sta_id = is_ap ? IWL_AP_ID : priv->hw_params.bcast_sta_id;
 645
 646         iwl_send_cmd_pdu_async(priv, REPLY_TX_LINK_QUALITY_CMD,
 647                                sizeof(link_cmd), &link_cmd, NULL);
 648 }
 649 /**
 650  * iwl_rxon_add_station - add station into station table.
 651  *
 652  * there is only one AP station with id= IWL_AP_ID
 653  * NOTE: mutex must be held before calling this fnction
 654  */
 655 int iwl_rxon_add_station(struct iwl_priv *priv, const u8 *addr, int is_ap)
 656 {
 657         u8 sta_id;
 658
 659         /* Add station to device's station table */
 660 #ifdef CONFIG_IWL4965_HT
 661         struct ieee80211_conf *conf = &priv->hw->conf;
 662         struct ieee80211_ht_info *cur_ht_config = &conf->ht_conf;
 663
 664         if ((is_ap) &&
 665             (conf->flags & IEEE80211_CONF_SUPPORT_HT_MODE) &&
 666             (priv->iw_mode == IEEE80211_IF_TYPE_STA))
 667                 sta_id = iwl_add_station_flags(priv, addr, is_ap,
 668                                                    0, cur_ht_config);
 669         else
 670 #endif /* CONFIG_IWL4965_HT */
 671                 sta_id = iwl_add_station_flags(priv, addr, is_ap,
 672                                                    0, NULL);
 673
 674         /* Set up default rate scaling table in device's station table */
 675         iwl_sta_init_lq(priv, addr, is_ap);
 676
 677         return sta_id;
 678 }
 679 EXPORT_SYMBOL(iwl_rxon_add_station);
 680
 681
 682 /**
 683  * iwl_get_sta_id - Find station's index within station table
 684  *
 685  * If new IBSS station, create new entry in station table
 686  */
 687 int iwl_get_sta_id(struct iwl_priv *priv, struct ieee80211_hdr *hdr)
 688 {
 689         int sta_id;
 690         u16 fc = le16_to_cpu(hdr->frame_control);
 691         DECLARE_MAC_BUF(mac);
 692
 693         /* If this frame is broadcast or management, use broadcast station id */
 694         if (((fc & IEEE80211_FCTL_FTYPE) != IEEE80211_FTYPE_DATA) ||
 695             is_multicast_ether_addr(hdr->addr1))
 696                 return priv->hw_params.bcast_sta_id;
 697
 698         switch (priv->iw_mode) {
 699
 700         /* If we are a client station in a BSS network, use the special
 701          * AP station entry (that's the only station we communicate with) */
 702         case IEEE80211_IF_TYPE_STA:
 703                 return IWL_AP_ID;
 704
 705         /* If we are an AP, then find the station, or use BCAST */
 706         case IEEE80211_IF_TYPE_AP:
 707                 sta_id = iwl_find_station(priv, hdr->addr1);
 708                 if (sta_id != IWL_INVALID_STATION)
 709                         return sta_id;
 710                 return priv->hw_params.bcast_sta_id;
 711
 712         /* If this frame is going out to an IBSS network, find the station,
 713          * or create a new station table entry */
 714         case IEEE80211_IF_TYPE_IBSS:
 715                 sta_id = iwl_find_station(priv, hdr->addr1);
 716                 if (sta_id != IWL_INVALID_STATION)
 717                         return sta_id;
 718
 719                 /* Create new station table entry */
 720                 sta_id = iwl_add_station_flags(priv, hdr->addr1,
 721                                                    0, CMD_ASYNC, NULL);
 722
 723                 if (sta_id != IWL_INVALID_STATION)
 724                         return sta_id;
 725
 726                 IWL_DEBUG_DROP("Station %s not in station map. "
 727                                "Defaulting to broadcast...\n",
 728                                print_mac(mac, hdr->addr1));
 729                 iwl_print_hex_dump(priv, IWL_DL_DROP, (u8 *) hdr, sizeof(*hdr));
 730                 return priv->hw_params.bcast_sta_id;
 731
 732         default:
 733                 IWL_WARNING("Unknown mode of operation: %d", priv->iw_mode);
 734                 return priv->hw_params.bcast_sta_id;
 735         }
 736 }
 737 EXPORT_SYMBOL(iwl_get_sta_id);
 738