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   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 int iwl_get_free_ucode_key_index(struct iwl_priv *priv)
 121 {
 122         int i;
 123
 124         for (i = 0; i < STA_KEY_MAX_NUM; i++)
 125                 if (!test_and_set_bit(i, &priv->ucode_key_table))
 126                         return i;
 127
 128         return -1;
 129 }
 130
 131 int iwl_send_static_wepkey_cmd(struct iwl_priv *priv, u8 send_if_empty)
 132 {
 133         int i, not_empty = 0;
 134         u8 buff[sizeof(struct iwl_wep_cmd) +
 135                 sizeof(struct iwl_wep_key) * WEP_KEYS_MAX];
 136         struct iwl_wep_cmd *wep_cmd = (struct iwl_wep_cmd *)buff;
 137         size_t cmd_size  = sizeof(struct iwl_wep_cmd);
 138         struct iwl_host_cmd cmd = {
 139                 .id = REPLY_WEPKEY,
 140                 .data = wep_cmd,
 141                 .meta.flags = CMD_ASYNC,
 142         };
 143
 144         memset(wep_cmd, 0, cmd_size +
 145                         (sizeof(struct iwl_wep_key) * WEP_KEYS_MAX));
 146
 147         for (i = 0; i < WEP_KEYS_MAX ; i++) {
 148                 wep_cmd->key[i].key_index = i;
 149                 if (priv->wep_keys[i].key_size) {
 150                         wep_cmd->key[i].key_offset = i;
 151                         not_empty = 1;
 152                 } else {
 153                         wep_cmd->key[i].key_offset = WEP_INVALID_OFFSET;
 154                 }
 155
 156                 wep_cmd->key[i].key_size = priv->wep_keys[i].key_size;
 157                 memcpy(&wep_cmd->key[i].key[3], priv->wep_keys[i].key,
 158                                 priv->wep_keys[i].key_size);
 159         }
 160
 161         wep_cmd->global_key_type = WEP_KEY_WEP_TYPE;
 162         wep_cmd->num_keys = WEP_KEYS_MAX;
 163
 164         cmd_size += sizeof(struct iwl_wep_key) * WEP_KEYS_MAX;
 165
 166         cmd.len = cmd_size;
 167
 168         if (not_empty || send_if_empty)
 169                 return iwl_send_cmd(priv, &cmd);
 170         else
 171                 return 0;
 172 }
 173 EXPORT_SYMBOL(iwl_send_static_wepkey_cmd);
 174
 175 int iwl_remove_default_wep_key(struct iwl_priv *priv,
 176                                struct ieee80211_key_conf *keyconf)
 177 {
 178         int ret;
 179         unsigned long flags;
 180
 181         spin_lock_irqsave(&priv->sta_lock, flags);
 182
 183         if (!test_and_clear_bit(keyconf->keyidx, &priv->ucode_key_table))
 184                 IWL_ERROR("index %d not used in uCode key table.\n",
 185                           keyconf->keyidx);
 186
 187         priv->default_wep_key--;
 188         memset(&priv->wep_keys[keyconf->keyidx], 0, sizeof(priv->wep_keys[0]));
 189         ret = iwl_send_static_wepkey_cmd(priv, 1);
 190         spin_unlock_irqrestore(&priv->sta_lock, flags);
 191
 192         return ret;
 193 }
 194 EXPORT_SYMBOL(iwl_remove_default_wep_key);
 195
 196 int iwl_set_default_wep_key(struct iwl_priv *priv,
 197                             struct ieee80211_key_conf *keyconf)
 198 {
 199         int ret;
 200         unsigned long flags;
 201
 202         keyconf->flags &= ~IEEE80211_KEY_FLAG_GENERATE_IV;
 203         keyconf->hw_key_idx = keyconf->keyidx;
 204         priv->stations[IWL_AP_ID].keyinfo.alg = ALG_WEP;
 205
 206         spin_lock_irqsave(&priv->sta_lock, flags);
 207         priv->default_wep_key++;
 208
 209         if (test_and_set_bit(keyconf->keyidx, &priv->ucode_key_table))
 210                 IWL_ERROR("index %d already used in uCode key table.\n",
 211                         keyconf->keyidx);
 212
 213         priv->wep_keys[keyconf->keyidx].key_size = keyconf->keylen;
 214         memcpy(&priv->wep_keys[keyconf->keyidx].key, &keyconf->key,
 215                                                         keyconf->keylen);
 216
 217         ret = iwl_send_static_wepkey_cmd(priv, 0);
 218         spin_unlock_irqrestore(&priv->sta_lock, flags);
 219
 220         return ret;
 221 }
 222 EXPORT_SYMBOL(iwl_set_default_wep_key);
 223
 224 static int iwl_set_wep_dynamic_key_info(struct iwl_priv *priv,
 225                                 struct ieee80211_key_conf *keyconf,
 226                                 u8 sta_id)
 227 {
 228         unsigned long flags;
 229         __le16 key_flags = 0;
 230         int ret;
 231
 232         keyconf->flags &= ~IEEE80211_KEY_FLAG_GENERATE_IV;
 233         keyconf->hw_key_idx = keyconf->keyidx;
 234
 235         key_flags |= (STA_KEY_FLG_WEP | STA_KEY_FLG_MAP_KEY_MSK);
 236         key_flags |= cpu_to_le16(keyconf->keyidx << STA_KEY_FLG_KEYID_POS);
 237         key_flags &= ~STA_KEY_FLG_INVALID;
 238
 239         if (keyconf->keylen == WEP_KEY_LEN_128)
 240                 key_flags |= STA_KEY_FLG_KEY_SIZE_MSK;
 241
 242         if (sta_id == priv->hw_params.bcast_sta_id)
 243                 key_flags |= STA_KEY_MULTICAST_MSK;
 244
 245         spin_lock_irqsave(&priv->sta_lock, flags);
 246
 247         priv->stations[sta_id].keyinfo.alg = keyconf->alg;
 248         priv->stations[sta_id].keyinfo.keylen = keyconf->keylen;
 249         priv->stations[sta_id].keyinfo.keyidx = keyconf->keyidx;
 250
 251         memcpy(priv->stations[sta_id].keyinfo.key,
 252                                 keyconf->key, keyconf->keylen);
 253
 254         memcpy(&priv->stations[sta_id].sta.key.key[3],
 255                                 keyconf->key, keyconf->keylen);
 256
 257         if ((priv->stations[sta_id].sta.key.key_flags & STA_KEY_FLG_ENCRYPT_MSK)
 258                         == STA_KEY_FLG_NO_ENC)
 259                 priv->stations[sta_id].sta.key.key_offset =
 260                                  iwl_get_free_ucode_key_index(priv);
 261         /* else, we are overriding an existing key => no need to allocated room
 262          * in uCode. */
 263
 264         priv->stations[sta_id].sta.key.key_flags = key_flags;
 265         priv->stations[sta_id].sta.sta.modify_mask = STA_MODIFY_KEY_MASK;
 266         priv->stations[sta_id].sta.mode = STA_CONTROL_MODIFY_MSK;
 267
 268         ret = iwl_send_add_sta(priv, &priv->stations[sta_id].sta, CMD_ASYNC);
 269
 270         spin_unlock_irqrestore(&priv->sta_lock, flags);
 271
 272         return ret;
 273 }
 274
 275 static int iwl_set_ccmp_dynamic_key_info(struct iwl_priv *priv,
 276                                    struct ieee80211_key_conf *keyconf,
 277                                    u8 sta_id)
 278 {
 279         unsigned long flags;
 280         __le16 key_flags = 0;
 281
 282         key_flags |= (STA_KEY_FLG_CCMP | STA_KEY_FLG_MAP_KEY_MSK);
 283         key_flags |= cpu_to_le16(keyconf->keyidx << STA_KEY_FLG_KEYID_POS);
 284         key_flags &= ~STA_KEY_FLG_INVALID;
 285
 286         if (sta_id == priv->hw_params.bcast_sta_id)
 287                 key_flags |= STA_KEY_MULTICAST_MSK;
 288
 289         keyconf->flags |= IEEE80211_KEY_FLAG_GENERATE_IV;
 290         keyconf->hw_key_idx = keyconf->keyidx;
 291
 292         spin_lock_irqsave(&priv->sta_lock, flags);
 293         priv->stations[sta_id].keyinfo.alg = keyconf->alg;
 294         priv->stations[sta_id].keyinfo.keylen = keyconf->keylen;
 295
 296         memcpy(priv->stations[sta_id].keyinfo.key, keyconf->key,
 297                keyconf->keylen);
 298
 299         memcpy(priv->stations[sta_id].sta.key.key, keyconf->key,
 300                keyconf->keylen);
 301
 302         if ((priv->stations[sta_id].sta.key.key_flags & STA_KEY_FLG_ENCRYPT_MSK)
 303                         == STA_KEY_FLG_NO_ENC)
 304                 priv->stations[sta_id].sta.key.key_offset =
 305                                  iwl_get_free_ucode_key_index(priv);
 306         /* else, we are overriding an existing key => no need to allocated room
 307          * in uCode. */
 308
 309         priv->stations[sta_id].sta.key.key_flags = key_flags;
 310         priv->stations[sta_id].sta.sta.modify_mask = STA_MODIFY_KEY_MASK;
 311         priv->stations[sta_id].sta.mode = STA_CONTROL_MODIFY_MSK;
 312
 313         spin_unlock_irqrestore(&priv->sta_lock, flags);
 314
 315         IWL_DEBUG_INFO("hwcrypto: modify ucode station key info\n");
 316         return iwl_send_add_sta(priv, &priv->stations[sta_id].sta, CMD_ASYNC);
 317 }
 318
 319 static int iwl_set_tkip_dynamic_key_info(struct iwl_priv *priv,
 320                                    struct ieee80211_key_conf *keyconf,
 321                                    u8 sta_id)
 322 {
 323         unsigned long flags;
 324         int ret = 0;
 325
 326         keyconf->flags |= IEEE80211_KEY_FLAG_GENERATE_IV;
 327         keyconf->flags |= IEEE80211_KEY_FLAG_GENERATE_MMIC;
 328         keyconf->hw_key_idx = keyconf->keyidx;
 329
 330         spin_lock_irqsave(&priv->sta_lock, flags);
 331
 332         priv->stations[sta_id].keyinfo.alg = keyconf->alg;
 333         priv->stations[sta_id].keyinfo.conf = keyconf;
 334         priv->stations[sta_id].keyinfo.keylen = 16;
 335
 336         if ((priv->stations[sta_id].sta.key.key_flags & STA_KEY_FLG_ENCRYPT_MSK)
 337                         == STA_KEY_FLG_NO_ENC)
 338                 priv->stations[sta_id].sta.key.key_offset =
 339                                  iwl_get_free_ucode_key_index(priv);
 340         /* else, we are overriding an existing key => no need to allocated room
 341          * in uCode. */
 342
 343         /* This copy is acutally not needed: we get the key with each TX */
 344         memcpy(priv->stations[sta_id].keyinfo.key, keyconf->key, 16);
 345
 346         memcpy(priv->stations[sta_id].sta.key.key, keyconf->key, 16);
 347
 348         spin_unlock_irqrestore(&priv->sta_lock, flags);
 349
 350         return ret;
 351 }
 352
 353 int iwl_remove_dynamic_key(struct iwl_priv *priv,
 354                                 struct ieee80211_key_conf *keyconf,
 355                                 u8 sta_id)
 356 {
 357         unsigned long flags;
 358         int ret = 0;
 359         u16 key_flags;
 360         u8 keyidx;
 361
 362         priv->key_mapping_key = 0;
 363
 364         spin_lock_irqsave(&priv->sta_lock, flags);
 365         key_flags = le16_to_cpu(priv->stations[sta_id].sta.key.key_flags);
 366         keyidx = (key_flags >> STA_KEY_FLG_KEYID_POS) & 0x3;
 367
 368         if (keyconf->keyidx != keyidx) {
 369                 /* We need to remove a key with index different that the one
 370                  * in the uCode. This means that the key we need to remove has
 371                  * been replaced by another one with different index.
 372                  * Don't do anything and return ok
 373                  */
 374                 spin_unlock_irqrestore(&priv->sta_lock, flags);
 375                 return 0;
 376         }
 377
 378         if (!test_and_clear_bit(priv->stations[sta_id].sta.key.key_offset,
 379                 &priv->ucode_key_table))
 380                 IWL_ERROR("index %d not used in uCode key table.\n",
 381                         priv->stations[sta_id].sta.key.key_offset);
 382         memset(&priv->stations[sta_id].keyinfo, 0,
 383                                         sizeof(struct iwl_hw_key));
 384         memset(&priv->stations[sta_id].sta.key, 0,
 385                                         sizeof(struct iwl4965_keyinfo));
 386         priv->stations[sta_id].sta.key.key_flags =
 387                         STA_KEY_FLG_NO_ENC | STA_KEY_FLG_INVALID;
 388         priv->stations[sta_id].sta.key.key_offset = WEP_INVALID_OFFSET;
 389         priv->stations[sta_id].sta.sta.modify_mask = STA_MODIFY_KEY_MASK;
 390         priv->stations[sta_id].sta.mode = STA_CONTROL_MODIFY_MSK;
 391
 392         IWL_DEBUG_INFO("hwcrypto: clear ucode station key info\n");
 393         ret =  iwl_send_add_sta(priv, &priv->stations[sta_id].sta, 0);
 394         spin_unlock_irqrestore(&priv->sta_lock, flags);
 395         return ret;
 396 }
 397 EXPORT_SYMBOL(iwl_remove_dynamic_key);
 398
 399 int iwl_set_dynamic_key(struct iwl_priv *priv,
 400                                 struct ieee80211_key_conf *key, u8 sta_id)
 401 {
 402         int ret;
 403
 404         priv->key_mapping_key = 1;
 405
 406         switch (key->alg) {
 407         case ALG_CCMP:
 408                 ret = iwl_set_ccmp_dynamic_key_info(priv, key, sta_id);
 409                 break;
 410         case ALG_TKIP:
 411                 ret = iwl_set_tkip_dynamic_key_info(priv, key, sta_id);
 412                 break;
 413         case ALG_WEP:
 414                 ret = iwl_set_wep_dynamic_key_info(priv, key, sta_id);
 415                 break;
 416         default:
 417                 IWL_ERROR("Unknown alg: %s alg = %d\n", __func__, key->alg);
 418                 ret = -EINVAL;
 419         }
 420
 421         return ret;
 422 }
 423 EXPORT_SYMBOL(iwl_set_dynamic_key);
 424
 425 #ifdef CONFIG_IWLWIFI_DEBUG
 426 static void iwl_dump_lq_cmd(struct iwl_priv *priv,
 427                            struct iwl_link_quality_cmd *lq)
 428 {
 429         int i;
 430         IWL_DEBUG_RATE("lq station id 0x%x\n", lq->sta_id);
 431         IWL_DEBUG_RATE("lq dta 0x%X 0x%X\n",
 432                        lq->general_params.single_stream_ant_msk,
 433                        lq->general_params.dual_stream_ant_msk);
 434
 435         for (i = 0; i < LINK_QUAL_MAX_RETRY_NUM; i++)
 436                 IWL_DEBUG_RATE("lq index %d 0x%X\n",
 437                                i, lq->rs_table[i].rate_n_flags);
 438 }
 439 #else
 440 static inline void iwl_dump_lq_cmd(struct iwl_priv *priv,
 441                                    struct iwl_link_quality_cmd *lq)
 442 {
 443 }
 444 #endif
 445
 446 int iwl_send_lq_cmd(struct iwl_priv *priv,
 447                     struct iwl_link_quality_cmd *lq, u8 flags)
 448 {
 449         struct iwl_host_cmd cmd = {
 450                 .id = REPLY_TX_LINK_QUALITY_CMD,
 451                 .len = sizeof(struct iwl_link_quality_cmd),
 452                 .meta.flags = flags,
 453                 .data = lq,
 454         };
 455
 456         if ((lq->sta_id == 0xFF) &&
 457             (priv->iw_mode == IEEE80211_IF_TYPE_IBSS))
 458                 return -EINVAL;
 459
 460         if (lq->sta_id == 0xFF)
 461                 lq->sta_id = IWL_AP_ID;
 462
 463         iwl_dump_lq_cmd(priv,lq);
 464
 465         if (iwl_is_associated(priv) && priv->assoc_station_added &&
 466             priv->lq_mngr.lq_ready)
 467                 return  iwl_send_cmd(priv, &cmd);
 468
 469         return 0;
 470 }
 471 EXPORT_SYMBOL(iwl_send_lq_cmd);
 472