SAFE public projects git trees. - safe/jmp/linux-2.6/blob - drivers/net/wireless/iwlwifi/iwl-sta.c

   1 /******************************************************************************
   2  *
   3  * Copyright(c) 2003 - 2008 Intel Corporation. All rights reserved.
   4  *
   5  * Portions of this file are derived from the ipw3945 project, as well
   6  * as portions of the ieee80211 subsystem header files.
   7  *
   8  * This program is free software; you can redistribute it and/or modify it
   9  * under the terms of version 2 of the GNU General Public License as
  10  * published by the Free Software Foundation.
  11  *
  12  * This program is distributed in the hope that it will be useful, but WITHOUT
  13  * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
  14  * FITNESS FOR A PARTICULAR PURPOSE.  See the GNU General Public License for
  15  * more details.
  16  *
  17  * You should have received a copy of the GNU General Public License along with
  18  * this program; if not, write to the Free Software Foundation, Inc.,
  19  * 51 Franklin Street, Fifth Floor, Boston, MA 02110, USA
  20  *
  21  * The full GNU General Public License is included in this distribution in the
  22  * file called LICENSE.
  23  *
  24  * Contact Information:
  25  * James P. Ketrenos <ipw2100-admin@linux.intel.com>
  26  * Intel Corporation, 5200 N.E. Elam Young Parkway, Hillsboro, OR 97124-6497
  27  *
  28  *****************************************************************************/
  29
  30 #include <net/mac80211.h>
  31 #include <linux/etherdevice.h>
  32
  33 #include "iwl-eeprom.h"
  34 #include "iwl-4965.h"
  35 #include "iwl-core.h"
  36 #include "iwl-sta.h"
  37 #include "iwl-io.h"
  38 #include "iwl-helpers.h"
  39 #include "iwl-4965.h"
  40 #include "iwl-sta.h"
  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
  76 int iwl_get_free_ucode_key_index(struct iwl_priv *priv)
  77 {
  78         int i;
  79
  80         for (i = 0; i < STA_KEY_MAX_NUM; i++)
  81                 if (!test_and_set_bit(i, &priv->ucode_key_table))
  82                         return i;
  83
  84         return -1;
  85 }
  86
  87 int iwl_send_static_wepkey_cmd(struct iwl_priv *priv, u8 send_if_empty)
  88 {
  89         int i, not_empty = 0;
  90         u8 buff[sizeof(struct iwl_wep_cmd) +
  91                 sizeof(struct iwl_wep_key) * WEP_KEYS_MAX];
  92         struct iwl_wep_cmd *wep_cmd = (struct iwl_wep_cmd *)buff;
  93         size_t cmd_size  = sizeof(struct iwl_wep_cmd);
  94         struct iwl_host_cmd cmd = {
  95                 .id = REPLY_WEPKEY,
  96                 .data = wep_cmd,
  97                 .meta.flags = CMD_ASYNC,
  98         };
  99
 100         memset(wep_cmd, 0, cmd_size +
 101                         (sizeof(struct iwl_wep_key) * WEP_KEYS_MAX));
 102
 103         for (i = 0; i < WEP_KEYS_MAX ; i++) {
 104                 wep_cmd->key[i].key_index = i;
 105                 if (priv->wep_keys[i].key_size) {
 106                         wep_cmd->key[i].key_offset = i;
 107                         not_empty = 1;
 108                 } else {
 109                         wep_cmd->key[i].key_offset = WEP_INVALID_OFFSET;
 110                 }
 111
 112                 wep_cmd->key[i].key_size = priv->wep_keys[i].key_size;
 113                 memcpy(&wep_cmd->key[i].key[3], priv->wep_keys[i].key,
 114                                 priv->wep_keys[i].key_size);
 115         }
 116
 117         wep_cmd->global_key_type = WEP_KEY_WEP_TYPE;
 118         wep_cmd->num_keys = WEP_KEYS_MAX;
 119
 120         cmd_size += sizeof(struct iwl_wep_key) * WEP_KEYS_MAX;
 121
 122         cmd.len = cmd_size;
 123
 124         if (not_empty || send_if_empty)
 125                 return iwl_send_cmd(priv, &cmd);
 126         else
 127                 return 0;
 128 }
 129
 130 int iwl_remove_default_wep_key(struct iwl_priv *priv,
 131                                struct ieee80211_key_conf *keyconf)
 132 {
 133         int ret;
 134         unsigned long flags;
 135
 136         spin_lock_irqsave(&priv->sta_lock, flags);
 137
 138         if (!test_and_clear_bit(keyconf->keyidx, &priv->ucode_key_table))
 139                 IWL_ERROR("index %d not used in uCode key table.\n",
 140                           keyconf->keyidx);
 141
 142         priv->default_wep_key--;
 143         memset(&priv->wep_keys[keyconf->keyidx], 0, sizeof(priv->wep_keys[0]));
 144         ret = iwl_send_static_wepkey_cmd(priv, 1);
 145         spin_unlock_irqrestore(&priv->sta_lock, flags);
 146
 147         return ret;
 148 }
 149
 150 int iwl_set_default_wep_key(struct iwl_priv *priv,
 151                             struct ieee80211_key_conf *keyconf)
 152 {
 153         int ret;
 154         unsigned long flags;
 155
 156         keyconf->flags &= ~IEEE80211_KEY_FLAG_GENERATE_IV;
 157         keyconf->hw_key_idx = keyconf->keyidx;
 158         priv->stations[IWL_AP_ID].keyinfo.alg = ALG_WEP;
 159
 160         spin_lock_irqsave(&priv->sta_lock, flags);
 161         priv->default_wep_key++;
 162
 163         if (test_and_set_bit(keyconf->keyidx, &priv->ucode_key_table))
 164                 IWL_ERROR("index %d already used in uCode key table.\n",
 165                         keyconf->keyidx);
 166
 167         priv->wep_keys[keyconf->keyidx].key_size = keyconf->keylen;
 168         memcpy(&priv->wep_keys[keyconf->keyidx].key, &keyconf->key,
 169                                                         keyconf->keylen);
 170
 171         ret = iwl_send_static_wepkey_cmd(priv, 0);
 172         spin_unlock_irqrestore(&priv->sta_lock, flags);
 173
 174         return ret;
 175 }
 176
 177 static int iwl_set_wep_dynamic_key_info(struct iwl_priv *priv,
 178                                 struct ieee80211_key_conf *keyconf,
 179                                 u8 sta_id)
 180 {
 181         unsigned long flags;
 182         __le16 key_flags = 0;
 183         int ret;
 184
 185         keyconf->flags &= ~IEEE80211_KEY_FLAG_GENERATE_IV;
 186         keyconf->hw_key_idx = keyconf->keyidx;
 187
 188         key_flags |= (STA_KEY_FLG_WEP | STA_KEY_FLG_MAP_KEY_MSK);
 189         key_flags |= cpu_to_le16(keyconf->keyidx << STA_KEY_FLG_KEYID_POS);
 190         key_flags &= ~STA_KEY_FLG_INVALID;
 191
 192         if (keyconf->keylen == WEP_KEY_LEN_128)
 193                 key_flags |= STA_KEY_FLG_KEY_SIZE_MSK;
 194
 195         if (sta_id == priv->hw_params.bcast_sta_id)
 196                 key_flags |= STA_KEY_MULTICAST_MSK;
 197
 198         spin_lock_irqsave(&priv->sta_lock, flags);
 199
 200         priv->stations[sta_id].keyinfo.alg = keyconf->alg;
 201         priv->stations[sta_id].keyinfo.keylen = keyconf->keylen;
 202         priv->stations[sta_id].keyinfo.keyidx = keyconf->keyidx;
 203
 204         memcpy(priv->stations[sta_id].keyinfo.key,
 205                                 keyconf->key, keyconf->keylen);
 206
 207         memcpy(&priv->stations[sta_id].sta.key.key[3],
 208                                 keyconf->key, keyconf->keylen);
 209
 210         priv->stations[sta_id].sta.key.key_offset =
 211                                  iwl_get_free_ucode_key_index(priv);
 212         priv->stations[sta_id].sta.key.key_flags = key_flags;
 213
 214         priv->stations[sta_id].sta.sta.modify_mask = STA_MODIFY_KEY_MASK;
 215         priv->stations[sta_id].sta.mode = STA_CONTROL_MODIFY_MSK;
 216
 217         ret = iwl4965_send_add_station(priv,
 218                 &priv->stations[sta_id].sta, CMD_ASYNC);
 219
 220         spin_unlock_irqrestore(&priv->sta_lock, flags);
 221
 222         return ret;
 223 }
 224
 225 static int iwl_set_ccmp_dynamic_key_info(struct iwl_priv *priv,
 226                                    struct ieee80211_key_conf *keyconf,
 227                                    u8 sta_id)
 228 {
 229         unsigned long flags;
 230         __le16 key_flags = 0;
 231
 232         key_flags |= (STA_KEY_FLG_CCMP | STA_KEY_FLG_MAP_KEY_MSK);
 233         key_flags |= cpu_to_le16(keyconf->keyidx << STA_KEY_FLG_KEYID_POS);
 234         key_flags &= ~STA_KEY_FLG_INVALID;
 235
 236         if (sta_id == priv->hw_params.bcast_sta_id)
 237                 key_flags |= STA_KEY_MULTICAST_MSK;
 238
 239         keyconf->flags |= IEEE80211_KEY_FLAG_GENERATE_IV;
 240         keyconf->hw_key_idx = keyconf->keyidx;
 241
 242         spin_lock_irqsave(&priv->sta_lock, flags);
 243         priv->stations[sta_id].keyinfo.alg = keyconf->alg;
 244         priv->stations[sta_id].keyinfo.keylen = keyconf->keylen;
 245
 246         memcpy(priv->stations[sta_id].keyinfo.key, keyconf->key,
 247                keyconf->keylen);
 248
 249         memcpy(priv->stations[sta_id].sta.key.key, keyconf->key,
 250                keyconf->keylen);
 251
 252         priv->stations[sta_id].sta.key.key_offset =
 253                                 iwl_get_free_ucode_key_index(priv);
 254         priv->stations[sta_id].sta.key.key_flags = key_flags;
 255         priv->stations[sta_id].sta.sta.modify_mask = STA_MODIFY_KEY_MASK;
 256         priv->stations[sta_id].sta.mode = STA_CONTROL_MODIFY_MSK;
 257
 258         spin_unlock_irqrestore(&priv->sta_lock, flags);
 259
 260         IWL_DEBUG_INFO("hwcrypto: modify ucode station key info\n");
 261         return iwl4965_send_add_station(priv,
 262                                 &priv->stations[sta_id].sta, CMD_ASYNC);
 263 }
 264
 265 static int iwl_set_tkip_dynamic_key_info(struct iwl_priv *priv,
 266                                    struct ieee80211_key_conf *keyconf,
 267                                    u8 sta_id)
 268 {
 269         unsigned long flags;
 270         int ret = 0;
 271
 272         keyconf->flags |= IEEE80211_KEY_FLAG_GENERATE_IV;
 273         keyconf->flags |= IEEE80211_KEY_FLAG_GENERATE_MMIC;
 274         keyconf->hw_key_idx = keyconf->keyidx;
 275
 276         spin_lock_irqsave(&priv->sta_lock, flags);
 277
 278         priv->stations[sta_id].keyinfo.alg = keyconf->alg;
 279         priv->stations[sta_id].keyinfo.conf = keyconf;
 280         priv->stations[sta_id].keyinfo.keylen = 16;
 281         priv->stations[sta_id].sta.key.key_offset =
 282                                  iwl_get_free_ucode_key_index(priv);
 283
 284         /* This copy is acutally not needed: we get the key with each TX */
 285         memcpy(priv->stations[sta_id].keyinfo.key, keyconf->key, 16);
 286
 287         memcpy(priv->stations[sta_id].sta.key.key, keyconf->key, 16);
 288
 289         spin_unlock_irqrestore(&priv->sta_lock, flags);
 290
 291         return ret;
 292 }
 293
 294 int iwl_remove_dynamic_key(struct iwl_priv *priv, u8 sta_id)
 295 {
 296         unsigned long flags;
 297
 298         priv->key_mapping_key = 0;
 299
 300         spin_lock_irqsave(&priv->sta_lock, flags);
 301         if (!test_and_clear_bit(priv->stations[sta_id].sta.key.key_offset,
 302                 &priv->ucode_key_table))
 303                 IWL_ERROR("index %d not used in uCode key table.\n",
 304                         priv->stations[sta_id].sta.key.key_offset);
 305         memset(&priv->stations[sta_id].keyinfo, 0,
 306                                         sizeof(struct iwl4965_hw_key));
 307         memset(&priv->stations[sta_id].sta.key, 0,
 308                                         sizeof(struct iwl4965_keyinfo));
 309         priv->stations[sta_id].sta.key.key_flags = STA_KEY_FLG_NO_ENC;
 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         spin_unlock_irqrestore(&priv->sta_lock, flags);
 313
 314         IWL_DEBUG_INFO("hwcrypto: clear ucode station key info\n");
 315         return iwl4965_send_add_station(priv, &priv->stations[sta_id].sta, 0);
 316 }
 317
 318 int iwl_set_dynamic_key(struct iwl_priv *priv,
 319                                 struct ieee80211_key_conf *key, u8 sta_id)
 320 {
 321         int ret;
 322
 323         priv->key_mapping_key = 1;
 324
 325         switch (key->alg) {
 326         case ALG_CCMP:
 327                 ret = iwl_set_ccmp_dynamic_key_info(priv, key, sta_id);
 328                 break;
 329         case ALG_TKIP:
 330                 ret = iwl_set_tkip_dynamic_key_info(priv, key, sta_id);
 331                 break;
 332         case ALG_WEP:
 333                 ret = iwl_set_wep_dynamic_key_info(priv, key, sta_id);
 334                 break;
 335         default:
 336                 IWL_ERROR("Unknown alg: %s alg = %d\n", __func__, key->alg);
 337                 ret = -EINVAL;
 338         }
 339
 340         return ret;
 341 }
 342
 343 #ifdef CONFIG_IWLWIFI_DEBUG
 344 static void iwl_dump_lq_cmd(struct iwl_priv *priv,
 345                            struct iwl_link_quality_cmd *lq)
 346 {
 347         int i;
 348         IWL_DEBUG_RATE("lq station id 0x%x\n", lq->sta_id);
 349         IWL_DEBUG_RATE("lq dta 0x%X 0x%X\n",
 350                        lq->general_params.single_stream_ant_msk,
 351                        lq->general_params.dual_stream_ant_msk);
 352
 353         for (i = 0; i < LINK_QUAL_MAX_RETRY_NUM; i++)
 354                 IWL_DEBUG_RATE("lq index %d 0x%X\n",
 355                                i, lq->rs_table[i].rate_n_flags);
 356 }
 357 #else
 358 static inline void iwl_dump_lq_cmd(struct iwl_priv *priv,
 359                                    struct iwl_link_quality_cmd *lq)
 360 {
 361 }
 362 #endif
 363
 364 int iwl_send_lq_cmd(struct iwl_priv *priv,
 365                     struct iwl_link_quality_cmd *lq, u8 flags)
 366 {
 367         struct iwl_host_cmd cmd = {
 368                 .id = REPLY_TX_LINK_QUALITY_CMD,
 369                 .len = sizeof(struct iwl_link_quality_cmd),
 370                 .meta.flags = flags,
 371                 .data = lq,
 372         };
 373
 374         if ((lq->sta_id == 0xFF) &&
 375             (priv->iw_mode == IEEE80211_IF_TYPE_IBSS))
 376                 return -EINVAL;
 377
 378         if (lq->sta_id == 0xFF)
 379                 lq->sta_id = IWL_AP_ID;
 380
 381         iwl_dump_lq_cmd(priv,lq);
 382
 383         if (iwl_is_associated(priv) && priv->assoc_station_added &&
 384             priv->lq_mngr.lq_ready)
 385                 return  iwl_send_cmd(priv, &cmd);
 386
 387         return 0;
 388 }
 389 EXPORT_SYMBOL(iwl_send_lq_cmd);
 390