drivers/net/wireless/iwlwifi/iwl-sta.c - kernel/msm-4.9 - Gitiles

 /******************************************************************************
  *
  * 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 <linux/etherdevice.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"

 u8 iwl_find_station(struct iwl_priv *priv, const u8 *addr)
 {
 	int i;
 	int start = 0;
 	int ret = IWL_INVALID_STATION;
 	unsigned long flags;
 	DECLARE_MAC_BUF(mac);

 	if ((priv->iw_mode == IEEE80211_IF_TYPE_IBSS) ||
 	    (priv->iw_mode == IEEE80211_IF_TYPE_AP))
 		start = IWL_STA_ID;

 	if (is_broadcast_ether_addr(addr))
 		return priv->hw_params.bcast_sta_id;

 	spin_lock_irqsave(&priv->sta_lock, flags);
 	for (i = start; i < priv->hw_params.max_stations; i++)
 		if (priv->stations[i].used &&
 		    (!compare_ether_addr(priv->stations[i].sta.sta.addr,
 					 addr))) {
 			ret = i;
 			goto out;
 		}

 	IWL_DEBUG_ASSOC_LIMIT("can not find STA %s total %d\n",
 			      print_mac(mac, addr), priv->num_stations);

  out:
 	spin_unlock_irqrestore(&priv->sta_lock, flags);
 	return ret;
 }
 EXPORT_SYMBOL(iwl_find_station);


 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);

 	if ((priv->stations[sta_id].sta.key.key_flags & STA_KEY_FLG_ENCRYPT_MSK)
 			== STA_KEY_FLG_NO_ENC)
 		priv->stations[sta_id].sta.key.key_offset =
 				 iwl_get_free_ucode_key_index(priv);
 	/* else, we are overriding an existing key => no need to allocated room
 	 * in uCode. */

 	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);

 	if ((priv->stations[sta_id].sta.key.key_flags & STA_KEY_FLG_ENCRYPT_MSK)
 			== STA_KEY_FLG_NO_ENC)
 		priv->stations[sta_id].sta.key.key_offset =
 				 iwl_get_free_ucode_key_index(priv);
 	/* else, we are overriding an existing key => no need to allocated room
 	 * in uCode. */

 	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;

 	if ((priv->stations[sta_id].sta.key.key_flags & STA_KEY_FLG_ENCRYPT_MSK)
 			== STA_KEY_FLG_NO_ENC)
 		priv->stations[sta_id].sta.key.key_offset =
 				 iwl_get_free_ucode_key_index(priv);
 	/* else, we are overriding an existing key => no need to allocated room
 	 * in uCode. */

 	/* 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,
 				struct ieee80211_key_conf *keyconf,
 				u8 sta_id)
 {
 	unsigned long flags;
 	int ret = 0;
 	u16 key_flags;
 	u8 keyidx;

 	priv->key_mapping_key = 0;

 	spin_lock_irqsave(&priv->sta_lock, flags);
 	key_flags = le16_to_cpu(priv->stations[sta_id].sta.key.key_flags);
 	keyidx = (key_flags >> STA_KEY_FLG_KEYID_POS) & 0x3;

 	if (keyconf->keyidx != keyidx) {
 		/* We need to remove a key with index different that the one
 		 * in the uCode. This means that the key we need to remove has
 		 * been replaced by another one with different index.
 		 * Don't do anything and return ok
 		 */
 		spin_unlock_irqrestore(&priv->sta_lock, flags);
 		return 0;
 	}

 	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 | STA_KEY_FLG_INVALID;
 	priv->stations[sta_id].sta.key.key_offset = WEP_INVALID_OFFSET;
 	priv->stations[sta_id].sta.sta.modify_mask = STA_MODIFY_KEY_MASK;
 	priv->stations[sta_id].sta.mode = STA_CONTROL_MODIFY_MSK;

 	IWL_DEBUG_INFO("hwcrypto: clear ucode station key info\n");
 	ret =  iwl4965_send_add_station(priv, &priv->stations[sta_id].sta, 0);
 	spin_unlock_irqrestore(&priv->sta_lock, flags);
 	return ret;
 }

 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;
 }

 #ifdef CONFIG_IWLWIFI_DEBUG
 static void iwl_dump_lq_cmd(struct iwl_priv *priv,
 			   struct iwl_link_quality_cmd *lq)
 {
 	int i;
 	IWL_DEBUG_RATE("lq station id 0x%x\n", lq->sta_id);
 	IWL_DEBUG_RATE("lq dta 0x%X 0x%X\n",
 		       lq->general_params.single_stream_ant_msk,
 		       lq->general_params.dual_stream_ant_msk);

 	for (i = 0; i < LINK_QUAL_MAX_RETRY_NUM; i++)
 		IWL_DEBUG_RATE("lq index %d 0x%X\n",
 			       i, lq->rs_table[i].rate_n_flags);
 }
 #else
 static inline void iwl_dump_lq_cmd(struct iwl_priv *priv,
 				   struct iwl_link_quality_cmd *lq)
 {
 }
 #endif

 int iwl_send_lq_cmd(struct iwl_priv *priv,
 		    struct iwl_link_quality_cmd *lq, u8 flags)
 {
 	struct iwl_host_cmd cmd = {
 		.id = REPLY_TX_LINK_QUALITY_CMD,
 		.len = sizeof(struct iwl_link_quality_cmd),
 		.meta.flags = flags,
 		.data = lq,
 	};

 	if ((lq->sta_id == 0xFF) &&
 	    (priv->iw_mode == IEEE80211_IF_TYPE_IBSS))
 		return -EINVAL;

 	if (lq->sta_id == 0xFF)
 		lq->sta_id = IWL_AP_ID;

 	iwl_dump_lq_cmd(priv,lq);

 	if (iwl_is_associated(priv) && priv->assoc_station_added &&
 	    priv->lq_mngr.lq_ready)
 		return  iwl_send_cmd(priv, &cmd);

 	return 0;
 }
 EXPORT_SYMBOL(iwl_send_lq_cmd);
	/******************************************************************************
	*
	* 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 <linux/etherdevice.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"

	u8 iwl_find_station(struct iwl_priv priv, const u8 addr)
	{
	int i;
	int start = 0;
	int ret = IWL_INVALID_STATION;
	unsigned long flags;
	DECLARE_MAC_BUF(mac);

	if ((priv->iw_mode == IEEE80211_IF_TYPE_IBSS) \|\|
	(priv->iw_mode == IEEE80211_IF_TYPE_AP))
	start = IWL_STA_ID;

	if (is_broadcast_ether_addr(addr))
	return priv->hw_params.bcast_sta_id;

	spin_lock_irqsave(&priv->sta_lock, flags);
	for (i = start; i < priv->hw_params.max_stations; i++)
	if (priv->stations[i].used &&
	(!compare_ether_addr(priv->stations[i].sta.sta.addr,
	addr))) {
	ret = i;
	goto out;
	}

	IWL_DEBUG_ASSOC_LIMIT("can not find STA %s total %d\n",
	print_mac(mac, addr), priv->num_stations);

	out:
	spin_unlock_irqrestore(&priv->sta_lock, flags);
	return ret;
	}
	EXPORT_SYMBOL(iwl_find_station);


	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);

	if ((priv->stations[sta_id].sta.key.key_flags & STA_KEY_FLG_ENCRYPT_MSK)
	== STA_KEY_FLG_NO_ENC)
	priv->stations[sta_id].sta.key.key_offset =
	iwl_get_free_ucode_key_index(priv);
	/* else, we are overriding an existing key => no need to allocated room
	* in uCode. */

	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);

	if ((priv->stations[sta_id].sta.key.key_flags & STA_KEY_FLG_ENCRYPT_MSK)
	== STA_KEY_FLG_NO_ENC)
	priv->stations[sta_id].sta.key.key_offset =
	iwl_get_free_ucode_key_index(priv);
	/* else, we are overriding an existing key => no need to allocated room
	* in uCode. */

	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;

	if ((priv->stations[sta_id].sta.key.key_flags & STA_KEY_FLG_ENCRYPT_MSK)
	== STA_KEY_FLG_NO_ENC)
	priv->stations[sta_id].sta.key.key_offset =
	iwl_get_free_ucode_key_index(priv);
	/* else, we are overriding an existing key => no need to allocated room
	* in uCode. */

	/* 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,
	struct ieee80211_key_conf *keyconf,
	u8 sta_id)
	{
	unsigned long flags;
	int ret = 0;
	u16 key_flags;
	u8 keyidx;

	priv->key_mapping_key = 0;

	spin_lock_irqsave(&priv->sta_lock, flags);
	key_flags = le16_to_cpu(priv->stations[sta_id].sta.key.key_flags);
	keyidx = (key_flags >> STA_KEY_FLG_KEYID_POS) & 0x3;

	if (keyconf->keyidx != keyidx) {
	/* We need to remove a key with index different that the one
	* in the uCode. This means that the key we need to remove has
	* been replaced by another one with different index.
	* Don't do anything and return ok
	*/
	spin_unlock_irqrestore(&priv->sta_lock, flags);
	return 0;
	}

	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 \| STA_KEY_FLG_INVALID;
	priv->stations[sta_id].sta.key.key_offset = WEP_INVALID_OFFSET;
	priv->stations[sta_id].sta.sta.modify_mask = STA_MODIFY_KEY_MASK;
	priv->stations[sta_id].sta.mode = STA_CONTROL_MODIFY_MSK;

	IWL_DEBUG_INFO("hwcrypto: clear ucode station key info\n");
	ret = iwl4965_send_add_station(priv, &priv->stations[sta_id].sta, 0);
	spin_unlock_irqrestore(&priv->sta_lock, flags);
	return ret;
	}

	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;
	}

	#ifdef CONFIG_IWLWIFI_DEBUG
	static void iwl_dump_lq_cmd(struct iwl_priv *priv,
	struct iwl_link_quality_cmd *lq)
	{
	int i;
	IWL_DEBUG_RATE("lq station id 0x%x\n", lq->sta_id);
	IWL_DEBUG_RATE("lq dta 0x%X 0x%X\n",
	lq->general_params.single_stream_ant_msk,
	lq->general_params.dual_stream_ant_msk);

	for (i = 0; i < LINK_QUAL_MAX_RETRY_NUM; i++)
	IWL_DEBUG_RATE("lq index %d 0x%X\n",
	i, lq->rs_table[i].rate_n_flags);
	}
	#else
	static inline void iwl_dump_lq_cmd(struct iwl_priv *priv,
	struct iwl_link_quality_cmd *lq)
	{
	}
	#endif

	int iwl_send_lq_cmd(struct iwl_priv *priv,
	struct iwl_link_quality_cmd *lq, u8 flags)
	{
	struct iwl_host_cmd cmd = {
	.id = REPLY_TX_LINK_QUALITY_CMD,
	.len = sizeof(struct iwl_link_quality_cmd),
	.meta.flags = flags,
	.data = lq,
	};

	if ((lq->sta_id == 0xFF) &&
	(priv->iw_mode == IEEE80211_IF_TYPE_IBSS))
	return -EINVAL;

	if (lq->sta_id == 0xFF)
	lq->sta_id = IWL_AP_ID;

	iwl_dump_lq_cmd(priv,lq);

	if (iwl_is_associated(priv) && priv->assoc_station_added &&
	priv->lq_mngr.lq_ready)
	return iwl_send_cmd(priv, &cmd);

	return 0;
	}
	EXPORT_SYMBOL(iwl_send_lq_cmd);