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
  32 #include "iwl-eeprom.h"
  33 #include "iwl-4965.h"
  34 #include "iwl-core.h"
  35 #include "iwl-sta.h"
  36 #include "iwl-io.h"
  37 #include "iwl-helpers.h"
  38 #include "iwl-4965.h"
  39 #include "iwl-sta.h"
  40
  41 int iwl_get_free_ucode_key_index(struct iwl_priv *priv)
  42 {
  43         int i;
  44
  45         for (i = 0; i < STA_KEY_MAX_NUM; i++)
  46                 if (!test_and_set_bit(i, &priv->ucode_key_table))
  47                         return i;
  48
  49         return -1;
  50 }
  51
  52 int iwl_send_static_wepkey_cmd(struct iwl_priv *priv, u8 send_if_empty)
  53 {
  54         int i, not_empty = 0;
  55         u8 buff[sizeof(struct iwl_wep_cmd) +
  56                 sizeof(struct iwl_wep_key) * WEP_KEYS_MAX];
  57         struct iwl_wep_cmd *wep_cmd = (struct iwl_wep_cmd *)buff;
  58         size_t cmd_size  = sizeof(struct iwl_wep_cmd);
  59         struct iwl_host_cmd cmd = {
  60                 .id = REPLY_WEPKEY,
  61                 .data = wep_cmd,
  62                 .meta.flags = CMD_ASYNC,
  63         };
  64
  65         memset(wep_cmd, 0, cmd_size +
  66                         (sizeof(struct iwl_wep_key) * WEP_KEYS_MAX));
  67
  68         for (i = 0; i < WEP_KEYS_MAX ; i++) {
  69                 wep_cmd->key[i].key_index = i;
  70                 if (priv->wep_keys[i].key_size) {
  71                         wep_cmd->key[i].key_offset = i;
  72                         not_empty = 1;
  73                 } else {
  74                         wep_cmd->key[i].key_offset = WEP_INVALID_OFFSET;
  75                 }
  76
  77                 wep_cmd->key[i].key_size = priv->wep_keys[i].key_size;
  78                 memcpy(&wep_cmd->key[i].key[3], priv->wep_keys[i].key,
  79                                 priv->wep_keys[i].key_size);
  80         }
  81
  82         wep_cmd->global_key_type = WEP_KEY_WEP_TYPE;
  83         wep_cmd->num_keys = WEP_KEYS_MAX;
  84
  85         cmd_size += sizeof(struct iwl_wep_key) * WEP_KEYS_MAX;
  86
  87         cmd.len = cmd_size;
  88
  89         if (not_empty || send_if_empty)
  90                 return iwl_send_cmd(priv, &cmd);
  91         else
  92                 return 0;
  93 }
  94
  95 int iwl_remove_default_wep_key(struct iwl_priv *priv,
  96                                struct ieee80211_key_conf *keyconf)
  97 {
  98         int ret;
  99         unsigned long flags;
 100
 101         spin_lock_irqsave(&priv->sta_lock, flags);
 102
 103         if (!test_and_clear_bit(keyconf->keyidx, &priv->ucode_key_table))
 104                 IWL_ERROR("index %d not used in uCode key table.\n",
 105                           keyconf->keyidx);
 106
 107         priv->default_wep_key--;
 108         memset(&priv->wep_keys[keyconf->keyidx], 0, sizeof(priv->wep_keys[0]));
 109         ret = iwl_send_static_wepkey_cmd(priv, 1);
 110         spin_unlock_irqrestore(&priv->sta_lock, flags);
 111
 112         return ret;
 113 }
 114
 115 int iwl_set_default_wep_key(struct iwl_priv *priv,
 116                             struct ieee80211_key_conf *keyconf)
 117 {
 118         int ret;
 119         unsigned long flags;
 120
 121         keyconf->flags &= ~IEEE80211_KEY_FLAG_GENERATE_IV;
 122         keyconf->hw_key_idx = keyconf->keyidx;
 123         priv->stations[IWL_AP_ID].keyinfo.alg = ALG_WEP;
 124
 125         spin_lock_irqsave(&priv->sta_lock, flags);
 126         priv->default_wep_key++;
 127
 128         if (test_and_set_bit(keyconf->keyidx, &priv->ucode_key_table))
 129                 IWL_ERROR("index %d already used in uCode key table.\n",
 130                         keyconf->keyidx);
 131
 132         priv->wep_keys[keyconf->keyidx].key_size = keyconf->keylen;
 133         memcpy(&priv->wep_keys[keyconf->keyidx].key, &keyconf->key,
 134                                                         keyconf->keylen);
 135
 136         ret = iwl_send_static_wepkey_cmd(priv, 0);
 137         spin_unlock_irqrestore(&priv->sta_lock, flags);
 138
 139         return ret;
 140 }
 141
 142 static int iwl_set_wep_dynamic_key_info(struct iwl_priv *priv,
 143                                 struct ieee80211_key_conf *keyconf,
 144                                 u8 sta_id)
 145 {
 146         unsigned long flags;
 147         __le16 key_flags = 0;
 148         int ret;
 149
 150         keyconf->flags &= ~IEEE80211_KEY_FLAG_GENERATE_IV;
 151         keyconf->hw_key_idx = keyconf->keyidx;
 152
 153         key_flags |= (STA_KEY_FLG_WEP | STA_KEY_FLG_MAP_KEY_MSK);
 154         key_flags |= cpu_to_le16(keyconf->keyidx << STA_KEY_FLG_KEYID_POS);
 155         key_flags &= ~STA_KEY_FLG_INVALID;
 156
 157         if (keyconf->keylen == WEP_KEY_LEN_128)
 158                 key_flags |= STA_KEY_FLG_KEY_SIZE_MSK;
 159
 160         if (sta_id == priv->hw_params.bcast_sta_id)
 161                 key_flags |= STA_KEY_MULTICAST_MSK;
 162
 163         spin_lock_irqsave(&priv->sta_lock, flags);
 164
 165         priv->stations[sta_id].keyinfo.alg = keyconf->alg;
 166         priv->stations[sta_id].keyinfo.keylen = keyconf->keylen;
 167         priv->stations[sta_id].keyinfo.keyidx = keyconf->keyidx;
 168
 169         memcpy(priv->stations[sta_id].keyinfo.key,
 170                                 keyconf->key, keyconf->keylen);
 171
 172         memcpy(&priv->stations[sta_id].sta.key.key[3],
 173                                 keyconf->key, keyconf->keylen);
 174
 175         priv->stations[sta_id].sta.key.key_offset =
 176                                  iwl_get_free_ucode_key_index(priv);
 177         priv->stations[sta_id].sta.key.key_flags = key_flags;
 178
 179         priv->stations[sta_id].sta.sta.modify_mask = STA_MODIFY_KEY_MASK;
 180         priv->stations[sta_id].sta.mode = STA_CONTROL_MODIFY_MSK;
 181
 182         ret = iwl4965_send_add_station(priv,
 183                 &priv->stations[sta_id].sta, CMD_ASYNC);
 184
 185         spin_unlock_irqrestore(&priv->sta_lock, flags);
 186
 187         return ret;
 188 }
 189
 190 static int iwl_set_ccmp_dynamic_key_info(struct iwl_priv *priv,
 191                                    struct ieee80211_key_conf *keyconf,
 192                                    u8 sta_id)
 193 {
 194         unsigned long flags;
 195         __le16 key_flags = 0;
 196
 197         key_flags |= (STA_KEY_FLG_CCMP | STA_KEY_FLG_MAP_KEY_MSK);
 198         key_flags |= cpu_to_le16(keyconf->keyidx << STA_KEY_FLG_KEYID_POS);
 199         key_flags &= ~STA_KEY_FLG_INVALID;
 200
 201         if (sta_id == priv->hw_params.bcast_sta_id)
 202                 key_flags |= STA_KEY_MULTICAST_MSK;
 203
 204         keyconf->flags |= IEEE80211_KEY_FLAG_GENERATE_IV;
 205         keyconf->hw_key_idx = keyconf->keyidx;
 206
 207         spin_lock_irqsave(&priv->sta_lock, flags);
 208         priv->stations[sta_id].keyinfo.alg = keyconf->alg;
 209         priv->stations[sta_id].keyinfo.keylen = keyconf->keylen;
 210
 211         memcpy(priv->stations[sta_id].keyinfo.key, keyconf->key,
 212                keyconf->keylen);
 213
 214         memcpy(priv->stations[sta_id].sta.key.key, keyconf->key,
 215                keyconf->keylen);
 216
 217         priv->stations[sta_id].sta.key.key_offset =
 218                                 iwl_get_free_ucode_key_index(priv);
 219         priv->stations[sta_id].sta.key.key_flags = key_flags;
 220         priv->stations[sta_id].sta.sta.modify_mask = STA_MODIFY_KEY_MASK;
 221         priv->stations[sta_id].sta.mode = STA_CONTROL_MODIFY_MSK;
 222
 223         spin_unlock_irqrestore(&priv->sta_lock, flags);
 224
 225         IWL_DEBUG_INFO("hwcrypto: modify ucode station key info\n");
 226         return iwl4965_send_add_station(priv,
 227                                 &priv->stations[sta_id].sta, CMD_ASYNC);
 228 }
 229
 230 static int iwl_set_tkip_dynamic_key_info(struct iwl_priv *priv,
 231                                    struct ieee80211_key_conf *keyconf,
 232                                    u8 sta_id)
 233 {
 234         unsigned long flags;
 235         int ret = 0;
 236
 237         keyconf->flags |= IEEE80211_KEY_FLAG_GENERATE_IV;
 238         keyconf->flags |= IEEE80211_KEY_FLAG_GENERATE_MMIC;
 239         keyconf->hw_key_idx = keyconf->keyidx;
 240
 241         spin_lock_irqsave(&priv->sta_lock, flags);
 242
 243         priv->stations[sta_id].keyinfo.alg = keyconf->alg;
 244         priv->stations[sta_id].keyinfo.conf = keyconf;
 245         priv->stations[sta_id].keyinfo.keylen = 16;
 246         priv->stations[sta_id].sta.key.key_offset =
 247                                  iwl_get_free_ucode_key_index(priv);
 248
 249         /* This copy is acutally not needed: we get the key with each TX */
 250         memcpy(priv->stations[sta_id].keyinfo.key, keyconf->key, 16);
 251
 252         memcpy(priv->stations[sta_id].sta.key.key, keyconf->key, 16);
 253
 254         spin_unlock_irqrestore(&priv->sta_lock, flags);
 255
 256         return ret;
 257 }
 258
 259 int iwl_remove_dynamic_key(struct iwl_priv *priv, u8 sta_id)
 260 {
 261         unsigned long flags;
 262
 263         priv->key_mapping_key = 0;
 264
 265         spin_lock_irqsave(&priv->sta_lock, flags);
 266         if (!test_and_clear_bit(priv->stations[sta_id].sta.key.key_offset,
 267                 &priv->ucode_key_table))
 268                 IWL_ERROR("index %d not used in uCode key table.\n",
 269                         priv->stations[sta_id].sta.key.key_offset);
 270         memset(&priv->stations[sta_id].keyinfo, 0,
 271                                         sizeof(struct iwl4965_hw_key));
 272         memset(&priv->stations[sta_id].sta.key, 0,
 273                                         sizeof(struct iwl4965_keyinfo));
 274         priv->stations[sta_id].sta.key.key_flags = STA_KEY_FLG_NO_ENC;
 275         priv->stations[sta_id].sta.sta.modify_mask = STA_MODIFY_KEY_MASK;
 276         priv->stations[sta_id].sta.mode = STA_CONTROL_MODIFY_MSK;
 277         spin_unlock_irqrestore(&priv->sta_lock, flags);
 278
 279         IWL_DEBUG_INFO("hwcrypto: clear ucode station key info\n");
 280         return iwl4965_send_add_station(priv, &priv->stations[sta_id].sta, 0);
 281 }
 282
 283 int iwl_set_dynamic_key(struct iwl_priv *priv,
 284                                 struct ieee80211_key_conf *key, u8 sta_id)
 285 {
 286         int ret;
 287
 288         priv->key_mapping_key = 1;
 289
 290         switch (key->alg) {
 291         case ALG_CCMP:
 292                 ret = iwl_set_ccmp_dynamic_key_info(priv, key, sta_id);
 293                 break;
 294         case ALG_TKIP:
 295                 ret = iwl_set_tkip_dynamic_key_info(priv, key, sta_id);
 296                 break;
 297         case ALG_WEP:
 298                 ret = iwl_set_wep_dynamic_key_info(priv, key, sta_id);
 299                 break;
 300         default:
 301                 IWL_ERROR("Unknown alg: %s alg = %d\n", __func__, key->alg);
 302                 ret = -EINVAL;
 303         }
 304
 305         return ret;
 306 }
 307
 308 #ifdef CONFIG_IWLWIFI_DEBUG
 309 static void iwl_dump_lq_cmd(struct iwl_priv *priv,
 310                            struct iwl_link_quality_cmd *lq)
 311 {
 312         int i;
 313         IWL_DEBUG_RATE("lq station id 0x%x\n", lq->sta_id);
 314         IWL_DEBUG_RATE("lq dta 0x%X 0x%X\n",
 315                        lq->general_params.single_stream_ant_msk,
 316                        lq->general_params.dual_stream_ant_msk);
 317
 318         for (i = 0; i < LINK_QUAL_MAX_RETRY_NUM; i++)
 319                 IWL_DEBUG_RATE("lq index %d 0x%X\n",
 320                                i, lq->rs_table[i].rate_n_flags);
 321 }
 322 #else
 323 static inline void iwl_dump_lq_cmd(struct iwl_priv *priv,
 324                                    struct iwl_link_quality_cmd *lq)
 325 {
 326 }
 327 #endif
 328
 329 int iwl_send_lq_cmd(struct iwl_priv *priv,
 330                     struct iwl_link_quality_cmd *lq, u8 flags)
 331 {
 332         struct iwl_host_cmd cmd = {
 333                 .id = REPLY_TX_LINK_QUALITY_CMD,
 334                 .len = sizeof(struct iwl_link_quality_cmd),
 335                 .meta.flags = flags,
 336                 .data = lq,
 337         };
 338
 339         if ((lq->sta_id == 0xFF) &&
 340             (priv->iw_mode == IEEE80211_IF_TYPE_IBSS))
 341                 return -EINVAL;
 342
 343         if (lq->sta_id == 0xFF)
 344                 lq->sta_id = IWL_AP_ID;
 345
 346         iwl_dump_lq_cmd(priv,lq);
 347
 348         if (iwl_is_associated(priv) && priv->assoc_station_added &&
 349             priv->lq_mngr.lq_ready)
 350                 return  iwl_send_cmd(priv, &cmd);
 351
 352         return 0;
 353 }
 354 EXPORT_SYMBOL(iwl_send_lq_cmd);
 355