path: root/drivers/net/wireless/iwlwifi/mvm/sta.c

/******************************************************************************
 *
 * This file is provided under a dual BSD/GPLv2 license.  When using or
 * redistributing this file, you may do so under either license.
 *
 * GPL LICENSE SUMMARY
 *
 * Copyright(c) 2012 - 2013 Intel Corporation. All rights reserved.
 *
 * 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.GPL.
 *
 * Contact Information:
 *  Intel Linux Wireless <ilw@linux.intel.com>
 * Intel Corporation, 5200 N.E. Elam Young Parkway, Hillsboro, OR 97124-6497
 *
 * BSD LICENSE
 *
 * Copyright(c) 2012 - 2013 Intel Corporation. All rights reserved.
 * All rights reserved.
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 * modification, are permitted provided that the following conditions
 * are met:
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 *  * Redistributions of source code must retain the above copyright
 *    notice, this list of conditions and the following disclaimer.
 *  * Redistributions in binary form must reproduce the above copyright
 *    notice, this list of conditions and the following disclaimer in
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 *    contributors may be used to endorse or promote products derived
 *    from this software without specific prior written permission.
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 * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
 * "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
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 * OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
 * SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
 * LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
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 *****************************************************************************/
#include <net/mac80211.h>

#include "mvm.h"
#include "sta.h"

static int iwl_mvm_find_free_sta_id(struct iwl_mvm *mvm)
{
	int sta_id;

	WARN_ON_ONCE(test_bit(IWL_MVM_STATUS_IN_HW_RESTART, &mvm->status));

	lockdep_assert_held(&mvm->mutex);

	/* Don't take rcu_read_lock() since we are protected by mvm->mutex */
	for (sta_id = 0; sta_id < IWL_MVM_STATION_COUNT; sta_id++)
		if (!rcu_dereference_protected(mvm->fw_id_to_mac_id[sta_id],
					       lockdep_is_held(&mvm->mutex)))
			return sta_id;
	return IWL_MVM_STATION_COUNT;
}

/* send station add/update command to firmware */
int iwl_mvm_sta_send_to_fw(struct iwl_mvm *mvm, struct ieee80211_sta *sta,
			   bool update)
{
	struct iwl_mvm_sta *mvm_sta = (void *)sta->drv_priv;
	struct iwl_mvm_add_sta_cmd add_sta_cmd;
	int ret;
	u32 status;
	u32 agg_size = 0, mpdu_dens = 0;

	memset(&add_sta_cmd, 0, sizeof(add_sta_cmd));

	add_sta_cmd.sta_id = mvm_sta->sta_id;
	add_sta_cmd.mac_id_n_color = cpu_to_le32(mvm_sta->mac_id_n_color);
	if (!update) {
		add_sta_cmd.tfd_queue_msk = cpu_to_le32(mvm_sta->tfd_queue_msk);
		memcpy(&add_sta_cmd.addr, sta->addr, ETH_ALEN);
	}
	add_sta_cmd.add_modify = update ? 1 : 0;

	/* STA_FLG_FAT_EN_MSK ? */
	/* STA_FLG_MIMO_EN_MSK ? */

	if (sta->ht_cap.ht_supported) {
		add_sta_cmd.station_flags_msk |=
			cpu_to_le32(STA_FLG_MAX_AGG_SIZE_MSK |
				    STA_FLG_AGG_MPDU_DENS_MSK);

		mpdu_dens = sta->ht_cap.ampdu_density;
	}

	if (sta->vht_cap.vht_supported)