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/******************************************************************************
*
* Copyright(c) 2003 - 2008 Intel Corporation. All rights reserved.
*
* Portions of this file are derived from the ipw3945 project, as well
* as portions of the ieee80211 subsystem header files.
*
* This program is free software; you can redistribute it and/or modify it
* under the terms of version 2 of the GNU General Public License as
* published by the Free Software Foundation.
*
* This program is distributed in the hope that it will be useful, but WITHOUT
* ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
* FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License for
* more details.
*
* You should have received a copy of the GNU General Public License along with
* this program; if not, write to the Free Software Foundation, Inc.,
* 51 Franklin Street, Fifth Floor, Boston, MA 02110, USA
*
* The full GNU General Public License is included in this distribution in the
* file called LICENSE.
*
* Contact Information:
* James P. Ketrenos <ipw2100-admin@linux.intel.com>
* Intel Corporation, 5200 N.E. Elam Young Parkway, Hillsboro, OR 97124-6497
*
*****************************************************************************/
#include <net/mac80211.h>
#include "iwl-eeprom.h"
#include "iwl-4965.h"
#include "iwl-core.h"
#include "iwl-sta.h"
#include "iwl-io.h"
#include "iwl-helpers.h"
#include "iwl-4965.h"
#include "iwl-sta.h"
int iwl_get_free_ucode_key_index(struct iwl_priv *priv)
{
int i;
for (i = 0; i < STA_KEY_MAX_NUM; i++)
if (test_and_set_bit(i, &priv->ucode_key_table))
return i;
return -1;
}
int iwl_send_static_wepkey_cmd(struct iwl_priv *priv, u8 send_if_empty)
{
int i, not_empty = 0;
u8 buff[sizeof(struct iwl_wep_cmd) +
sizeof(struct iwl_wep_key) * WEP_KEYS_MAX];
struct iwl_wep_cmd *wep_cmd = (struct iwl_wep_cmd *)buff;
size_t cmd_size = sizeof(struct iwl_wep_cmd);
struct iwl_host_cmd cmd = {
.id = REPLY_WEPKEY,
.data = wep_cmd,
.meta.flags = CMD_ASYNC,
};
memset(wep_cmd, 0, cmd_size +
(sizeof(struct iwl_wep_key) * WEP_KEYS_MAX));
for (i = 0; i < WEP_KEYS_MAX ; i++) {
wep_cmd->key[i].key_index = i;
if (priv->wep_keys[i].key_size) {
wep_cmd->key[i].key_offset = i;
not_empty = 1;
} else {
wep_cmd->key[i].key_offset = WEP_INVALID_OFFSET;
}
wep_cmd->key[i].key_size = priv->wep_keys[i].key_size;
memcpy(&wep_cmd->key[i].key[3], priv->wep_keys[i].key,
priv->wep_keys[i].key_size);
}
wep_cmd->global_key_type = WEP_KEY_WEP_TYPE;
wep_cmd->num_keys = WEP_KEYS_MAX;
cmd_size += sizeof(struct iwl_wep_key) * WEP_KEYS_MAX;
cmd.len = cmd_size;
if (not_empty || send_if_empty)
return iwl_send_cmd(priv, &cmd);
else
return 0;
}
int iwl_remove_default_wep_key(struct iwl_priv *priv,
struct ieee80211_key_conf *keyconf)
{
int ret;
unsigned long flags;
spin_lock_irqsave(&priv->sta_lock, flags);
if (!test_and_clear_bit(keyconf->keyidx, &priv->ucode_key_table))
IWL_ERROR("index %d not used in uCode key table.\n",
keyconf->keyidx);
priv->default_wep_key--;
memset(&priv->wep_keys[keyconf->keyidx], 0, sizeof(priv->wep_keys[0]));
ret = iwl_send_static_wepkey_cmd(priv, 1);
spin_unlock_irqrestore(&priv->sta_lock, flags);
return ret;
}
int iwl_set_default_wep_key(struct iwl_priv *priv,
struct ieee80211_key_conf *keyconf)
{
int ret;
unsigned long flags;
keyconf->flags &= ~IEEE80211_KEY_FLAG_GENERATE_IV;
keyconf->hw_key_idx = keyconf->keyidx;
priv->stations[IWL_AP_ID].keyinfo.alg = ALG_WEP;
spin_lock_irqsave(&priv->sta_lock, flags);
priv->default_wep_key++;
if (test_and_set_bit(keyconf->keyidx, &priv->ucode_key_table))
IWL_ERROR("index %d already used in uCode key table.\n",
keyconf->keyidx);
priv->wep_keys[keyconf->keyidx].key_size = keyconf->keylen;
memcpy(&priv->wep_keys[keyconf->keyidx].key, &keyconf->key,
keyconf->keylen);
ret = iwl_send_static_wepkey_cmd(priv, 0);
spin_unlock_irqrestore(&priv->sta_lock, flags);
return ret;
}
static int iwl_set_wep_dynamic_key_info(struct iwl_priv *priv,
struct ieee80211_key_conf *keyconf,
u8 sta_id)
{
unsigned long flags;
__le16 key_flags = 0;
int ret;
keyconf->flags &= ~IEEE80211_KEY_FLAG_GENERATE_IV;
keyconf->hw_key_idx = keyconf->keyidx;
key_flags |= (STA_KEY_FLG_WEP | STA_KEY_FLG_MAP_KEY_MSK);
key_flags |= cpu_to_le16(keyconf->keyidx << STA_KEY_FLG_KEYID_POS);
key_flags &= ~STA_KEY_FLG_INVALID;
if (keyconf->keylen == WEP_KEY_LEN_128)
key_flags |= STA_KEY_FLG_KEY_SIZE_MSK;
if (sta_id == priv->hw_params.bcast_sta_id)
key_flags |= STA_KEY_MULTICAST_MSK;
spin_lock_irqsave(&priv->sta_lock, flags);
priv->stations[sta_id].keyinfo.alg = keyconf->alg;
priv->stations[sta_id].keyinfo.keylen = keyconf->keylen;
priv->stations[sta_id].keyinfo.keyidx = keyconf->keyidx;
memcpy(priv->stations[sta_id].keyinfo.key,
keyconf->key, keyconf->keylen);
memcpy(&priv->stations[sta_id].sta.key.key[3],
keyconf->key, keyconf->keylen);
priv->stations[sta_id].sta.key.key_offset =
iwl_get_free_ucode_key_index(priv);
priv->stations[sta_id].sta.key.key_flags = key_flags;
priv->stations[sta_id].sta.sta.modify_mask = STA_MODIFY_KEY_MASK;
priv->stations[sta_id].sta.mode = STA_CONTROL_MODIFY_MSK;
ret = iwl4965_send_add_station(priv,
&priv->stations[sta_id].sta, CMD_ASYNC);
spin_unlock_irqrestore(&priv->sta_lock, flags);
return ret;
}
static int iwl_set_ccmp_dynamic_key_info(struct iwl_priv *priv,
struct ieee80211_key_conf *keyconf,
u8 sta_id)
{
unsigned long flags;
__le16 key_flags = 0;
key_flags |= (STA_KEY_FLG_CCMP | STA_KEY_FLG_MAP_KEY_MSK);
key_flags |= cpu_to_le16(keyconf->keyidx << STA_KEY_FLG_KEYID_POS);
key_flags &= ~STA_KEY_FLG_INVALID;
if (sta_id == priv->hw_params.bcast_sta_id)
key_flags |= STA_KEY_MULTICAST_MSK;
keyconf->flags |= IEEE80211_KEY_FLAG_GENERATE_IV;
keyconf->hw_key_idx = keyconf->keyidx;
spin_lock_irqsave(&priv->sta_lock, flags);
priv->stations[sta_id].keyinfo.alg = keyconf->alg;
priv->stations[sta_id].keyinfo.keylen = keyconf->keylen;
memcpy(priv->stations[sta_id].keyinfo.key, keyconf->key,
keyconf->keylen);
memcpy(priv->stations[sta_id].sta.key.key, keyconf->key,
keyconf->keylen);
priv->stations[sta_id].sta.key.key_offset =
iwl_get_free_ucode_key_index(priv);
priv->stations[sta_id].sta.key.key_flags = key_flags;
priv->stations[sta_id].sta.sta.modify_mask = STA_MODIFY_KEY_MASK;
priv->stations[sta_id].sta.mode = STA_CONTROL_MODIFY_MSK;
spin_unlock_irqrestore(&priv->sta_lock, flags);
IWL_DEBUG_INFO("hwcrypto: modify ucode station key info\n");
return iwl4965_send_add_station(priv,
&priv->stations[sta_id].sta, CMD_ASYNC);
}
static int iwl_set_tkip_dynamic_key_info(struct iwl_priv *priv,
struct ieee80211_key_conf *keyconf,
u8 sta_id)
{
unsigned long flags;
int ret = 0;
keyconf->flags |= IEEE80211_KEY_FLAG_GENERATE_IV;
keyconf->flags |= IEEE80211_KEY_FLAG_GENERATE_MMIC;
keyconf->hw_key_idx = keyconf->keyidx;
spin_lock_irqsave(&priv->sta_lock, flags);
priv->stations[sta_id].keyinfo.alg = keyconf->alg;
priv->stations[sta_id].keyinfo.conf = keyconf;
priv->stations[sta_id].keyinfo.keylen = 16;
/* This copy is acutally not needed: we get the key with each TX */
memcpy(priv->stations[sta_id].keyinfo.key, keyconf->key, 16);
memcpy(priv->stations[sta_id].sta.key.key, keyconf->key, 16);
spin_unlock_irqrestore(&priv->sta_lock, flags);
return ret;
}
int iwl_remove_dynamic_key(struct iwl_priv *priv, u8 sta_id)
{
unsigned long flags;
priv->key_mapping_key = 0;
spin_lock_irqsave(&priv->sta_lock, flags);
if (!test_and_clear_bit(priv->stations[sta_id].sta.key.key_offset,
&priv->ucode_key_table))
IWL_ERROR("index %d not used in uCode key table.\n",
priv->stations[sta_id].sta.key.key_offset);
memset(&priv->stations[sta_id].keyinfo, 0,
sizeof(struct iwl4965_hw_key));
memset(&priv->stations[sta_id].sta.key, 0,
sizeof(struct iwl4965_keyinfo));
priv->stations[sta_id].sta.key.key_flags = STA_KEY_FLG_NO_ENC;
priv->stations[sta_id].sta.sta.modify_mask = STA_MODIFY_KEY_MASK;
priv->stations[sta_id].sta.mode = STA_CONTROL_MODIFY_MSK;
spin_unlock_irqrestore(&priv->sta_lock, flags);
IWL_DEBUG_INFO("hwcrypto: clear ucode station key info\n");
return iwl4965_send_add_station(priv, &priv->stations[sta_id].sta, 0);
}
int iwl_set_dynamic_key(struct iwl_priv *priv,
struct ieee80211_key_conf *key, u8 sta_id)
{
int ret;
priv->key_mapping_key = 1;
switch (key->alg) {
case ALG_CCMP:
ret = iwl_set_ccmp_dynamic_key_info(priv, key, sta_id);
break;
case ALG_TKIP:
ret = iwl_set_tkip_dynamic_key_info(priv, key, sta_id);
break;
case ALG_WEP:
ret = iwl_set_wep_dynamic_key_info(priv, key, sta_id);
break;
default:
IWL_ERROR("Unknown alg: %s alg = %d\n", __func__, key->alg);
ret = -EINVAL;
}
return ret;
}
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