sta.c 77.2 KB
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/******************************************************************************
 *
 * 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
 *
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 * Copyright(c) 2012 - 2015 Intel Corporation. All rights reserved.
 * Copyright(c) 2013 - 2015 Intel Mobile Communications GmbH
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 * Copyright(c) 2016 Intel Deutschland GmbH
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 *
 * 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
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 * in the file called COPYING.
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 *
 * Contact Information:
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 *  Intel Linux Wireless <linuxwifi@intel.com>
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 * Intel Corporation, 5200 N.E. Elam Young Parkway, Hillsboro, OR 97124-6497
 *
 * BSD LICENSE
 *
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 * Copyright(c) 2012 - 2015 Intel Corporation. All rights reserved.
 * Copyright(c) 2013 - 2015 Intel Mobile Communications GmbH
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 * Copyright(c) 2016 Intel Deutschland GmbH
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 * All rights reserved.
 *
 * Redistribution and use in source and binary forms, with or without
 * modification, are permitted provided that the following conditions
 * are met:
 *
 *  * 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
 *    the documentation and/or other materials provided with the
 *    distribution.
 *  * Neither the name Intel Corporation nor the names of its
 *    contributors may be used to endorse or promote products derived
 *    from this software without specific prior written permission.
 *
 * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
 * "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
 * LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
 * A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
 * 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,
 * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
 * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
 * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
 * OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
 *
 *****************************************************************************/
#include <net/mac80211.h>

#include "mvm.h"
#include "sta.h"
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#include "rs.h"
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/*
 * New version of ADD_STA_sta command added new fields at the end of the
 * structure, so sending the size of the relevant API's structure is enough to
 * support both API versions.
 */
static inline int iwl_mvm_add_sta_cmd_size(struct iwl_mvm *mvm)
{
	return iwl_mvm_has_new_rx_api(mvm) ?
		sizeof(struct iwl_mvm_add_sta_cmd) :
		sizeof(struct iwl_mvm_add_sta_cmd_v7);
}

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static int iwl_mvm_find_free_sta_id(struct iwl_mvm *mvm,
				    enum nl80211_iftype iftype)
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{
	int sta_id;
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	u32 reserved_ids = 0;
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	BUILD_BUG_ON(IWL_MVM_STATION_COUNT > 32);
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	WARN_ON_ONCE(test_bit(IWL_MVM_STATUS_IN_HW_RESTART, &mvm->status));

	lockdep_assert_held(&mvm->mutex);

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	/* d0i3/d3 assumes the AP's sta_id (of sta vif) is 0. reserve it. */
	if (iftype != NL80211_IFTYPE_STATION)
		reserved_ids = BIT(0);

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	/* Don't take rcu_read_lock() since we are protected by mvm->mutex */
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	for (sta_id = 0; sta_id < IWL_MVM_STATION_COUNT; sta_id++) {
		if (BIT(sta_id) & reserved_ids)
			continue;

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		if (!rcu_dereference_protected(mvm->fw_id_to_mac_id[sta_id],
					       lockdep_is_held(&mvm->mutex)))
			return sta_id;
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	}
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	return IWL_MVM_STATION_COUNT;
}

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/* send station add/update command to firmware */
int iwl_mvm_sta_send_to_fw(struct iwl_mvm *mvm, struct ieee80211_sta *sta,
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			   bool update, unsigned int flags)
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{
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	struct iwl_mvm_sta *mvm_sta = iwl_mvm_sta_from_mac80211(sta);
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	struct iwl_mvm_add_sta_cmd add_sta_cmd = {
		.sta_id = mvm_sta->sta_id,
		.mac_id_n_color = cpu_to_le32(mvm_sta->mac_id_n_color),
		.add_modify = update ? 1 : 0,
		.station_flags_msk = cpu_to_le32(STA_FLG_FAT_EN_MSK |
						 STA_FLG_MIMO_EN_MSK),
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		.tid_disable_tx = cpu_to_le16(mvm_sta->tid_disable_agg),
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	};
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	int ret;
	u32 status;
	u32 agg_size = 0, mpdu_dens = 0;

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	if (!update || (flags & STA_MODIFY_QUEUES)) {
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		add_sta_cmd.tfd_queue_msk = cpu_to_le32(mvm_sta->tfd_queue_msk);
		memcpy(&add_sta_cmd.addr, sta->addr, ETH_ALEN);
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		if (flags & STA_MODIFY_QUEUES)
			add_sta_cmd.modify_mask |= STA_MODIFY_QUEUES;
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	}
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	switch (sta->bandwidth) {
	case IEEE80211_STA_RX_BW_160:
		add_sta_cmd.station_flags |= cpu_to_le32(STA_FLG_FAT_EN_160MHZ);
		/* fall through */
	case IEEE80211_STA_RX_BW_80:
		add_sta_cmd.station_flags |= cpu_to_le32(STA_FLG_FAT_EN_80MHZ);
		/* fall through */
	case IEEE80211_STA_RX_BW_40:
		add_sta_cmd.station_flags |= cpu_to_le32(STA_FLG_FAT_EN_40MHZ);
		/* fall through */
	case IEEE80211_STA_RX_BW_20:
		if (sta->ht_cap.ht_supported)
			add_sta_cmd.station_flags |=
				cpu_to_le32(STA_FLG_FAT_EN_20MHZ);
		break;
	}

	switch (sta->rx_nss) {
	case 1:
		add_sta_cmd.station_flags |= cpu_to_le32(STA_FLG_MIMO_EN_SISO);
		break;
	case 2:
		add_sta_cmd.station_flags |= cpu_to_le32(STA_FLG_MIMO_EN_MIMO2);
		break;
	case 3 ... 8:
		add_sta_cmd.station_flags |= cpu_to_le32(STA_FLG_MIMO_EN_MIMO3);
		break;
	}

	switch (sta->smps_mode) {
	case IEEE80211_SMPS_AUTOMATIC:
	case IEEE80211_SMPS_NUM_MODES:
		WARN_ON(1);
		break;
	case IEEE80211_SMPS_STATIC:
		/* override NSS */
		add_sta_cmd.station_flags &= ~cpu_to_le32(STA_FLG_MIMO_EN_MSK);
		add_sta_cmd.station_flags |= cpu_to_le32(STA_FLG_MIMO_EN_SISO);
		break;
	case IEEE80211_SMPS_DYNAMIC:
		add_sta_cmd.station_flags |= cpu_to_le32(STA_FLG_RTS_MIMO_PROT);
		break;
	case IEEE80211_SMPS_OFF:
		/* nothing */
		break;
	}
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	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) {
		agg_size = sta->vht_cap.cap &
			IEEE80211_VHT_CAP_MAX_A_MPDU_LENGTH_EXPONENT_MASK;
		agg_size >>=
			IEEE80211_VHT_CAP_MAX_A_MPDU_LENGTH_EXPONENT_SHIFT;
	} else if (sta->ht_cap.ht_supported) {
		agg_size = sta->ht_cap.ampdu_factor;
	}

	add_sta_cmd.station_flags |=
		cpu_to_le32(agg_size << STA_FLG_MAX_AGG_SIZE_SHIFT);
	add_sta_cmd.station_flags |=
		cpu_to_le32(mpdu_dens << STA_FLG_AGG_MPDU_DENS_SHIFT);

	status = ADD_STA_SUCCESS;
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	ret = iwl_mvm_send_cmd_pdu_status(mvm, ADD_STA,
					  iwl_mvm_add_sta_cmd_size(mvm),
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					  &add_sta_cmd, &status);
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	if (ret)
		return ret;

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	switch (status & IWL_ADD_STA_STATUS_MASK) {
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	case ADD_STA_SUCCESS:
		IWL_DEBUG_ASSOC(mvm, "ADD_STA PASSED\n");
		break;
	default:
		ret = -EIO;
		IWL_ERR(mvm, "ADD_STA failed\n");
		break;
	}

	return ret;
}

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static void iwl_mvm_rx_agg_session_expired(unsigned long data)
{
	struct iwl_mvm_baid_data __rcu **rcu_ptr = (void *)data;
	struct iwl_mvm_baid_data *ba_data;
	struct ieee80211_sta *sta;
	struct iwl_mvm_sta *mvm_sta;
	unsigned long timeout;

	rcu_read_lock();

	ba_data = rcu_dereference(*rcu_ptr);

	if (WARN_ON(!ba_data))
		goto unlock;

	if (!ba_data->timeout)
		goto unlock;

	timeout = ba_data->last_rx + TU_TO_JIFFIES(ba_data->timeout * 2);
	if (time_is_after_jiffies(timeout)) {
		mod_timer(&ba_data->session_timer, timeout);
		goto unlock;
	}

	/* Timer expired */
	sta = rcu_dereference(ba_data->mvm->fw_id_to_mac_id[ba_data->sta_id]);
	mvm_sta = iwl_mvm_sta_from_mac80211(sta);
	ieee80211_stop_rx_ba_session_offl(mvm_sta->vif,
					  sta->addr, ba_data->tid);
unlock:
	rcu_read_unlock();
}

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static int iwl_mvm_tdls_sta_init(struct iwl_mvm *mvm,
				 struct ieee80211_sta *sta)
{
	unsigned long used_hw_queues;
	struct iwl_mvm_sta *mvmsta = iwl_mvm_sta_from_mac80211(sta);
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	unsigned int wdg_timeout =
		iwl_mvm_get_wd_timeout(mvm, NULL, true, false);
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	u32 ac;

	lockdep_assert_held(&mvm->mutex);

	used_hw_queues = iwl_mvm_get_used_hw_queues(mvm, NULL);

	/* Find available queues, and allocate them to the ACs */
	for (ac = 0; ac < IEEE80211_NUM_ACS; ac++) {
		u8 queue = find_first_zero_bit(&used_hw_queues,
					       mvm->first_agg_queue);

		if (queue >= mvm->first_agg_queue) {
			IWL_ERR(mvm, "Failed to allocate STA queue\n");
			return -EBUSY;
		}

		__set_bit(queue, &used_hw_queues);
		mvmsta->hw_queue[ac] = queue;
	}

	/* Found a place for all queues - enable them */
	for (ac = 0; ac < IEEE80211_NUM_ACS; ac++) {
		iwl_mvm_enable_ac_txq(mvm, mvmsta->hw_queue[ac],
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				      mvmsta->hw_queue[ac],
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				      iwl_mvm_ac_to_tx_fifo[ac], 0,
				      wdg_timeout);
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		mvmsta->tfd_queue_msk |= BIT(mvmsta->hw_queue[ac]);
	}

	return 0;
}

static void iwl_mvm_tdls_sta_deinit(struct iwl_mvm *mvm,
				    struct ieee80211_sta *sta)
{
	struct iwl_mvm_sta *mvmsta = iwl_mvm_sta_from_mac80211(sta);
	unsigned long sta_msk;
	int i;

	lockdep_assert_held(&mvm->mutex);

	/* disable the TDLS STA-specific queues */
	sta_msk = mvmsta->tfd_queue_msk;
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	for_each_set_bit(i, &sta_msk, sizeof(sta_msk) * BITS_PER_BYTE)
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		iwl_mvm_disable_txq(mvm, i, i, IWL_MAX_TID_COUNT, 0);
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}

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/* Disable aggregations for a bitmap of TIDs for a given station */
static int iwl_mvm_invalidate_sta_queue(struct iwl_mvm *mvm, int queue,
					unsigned long disable_agg_tids,
					bool remove_queue)
{
	struct iwl_mvm_add_sta_cmd cmd = {};
	struct ieee80211_sta *sta;
	struct iwl_mvm_sta *mvmsta;
	u32 status;
	u8 sta_id;
	int ret;

	spin_lock_bh(&mvm->queue_info_lock);
	sta_id = mvm->queue_info[queue].ra_sta_id;
	spin_unlock_bh(&mvm->queue_info_lock);

	rcu_read_lock();

	sta = rcu_dereference(mvm->fw_id_to_mac_id[sta_id]);

	if (WARN_ON_ONCE(IS_ERR_OR_NULL(sta))) {
		rcu_read_unlock();
		return -EINVAL;
	}

	mvmsta = iwl_mvm_sta_from_mac80211(sta);

	mvmsta->tid_disable_agg |= disable_agg_tids;

	cmd.mac_id_n_color = cpu_to_le32(mvmsta->mac_id_n_color);
	cmd.sta_id = mvmsta->sta_id;
	cmd.add_modify = STA_MODE_MODIFY;
	cmd.modify_mask = STA_MODIFY_QUEUES;
	if (disable_agg_tids)
		cmd.modify_mask |= STA_MODIFY_TID_DISABLE_TX;
	if (remove_queue)
		cmd.modify_mask |= STA_MODIFY_QUEUE_REMOVAL;
	cmd.tfd_queue_msk = cpu_to_le32(mvmsta->tfd_queue_msk);
	cmd.tid_disable_tx = cpu_to_le16(mvmsta->tid_disable_agg);

	rcu_read_unlock();

	/* Notify FW of queue removal from the STA queues */
	status = ADD_STA_SUCCESS;
	ret = iwl_mvm_send_cmd_pdu_status(mvm, ADD_STA,
					  iwl_mvm_add_sta_cmd_size(mvm),
					  &cmd, &status);

	return ret;
}

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static int iwl_mvm_get_queue_agg_tids(struct iwl_mvm *mvm, int queue)
{
	struct ieee80211_sta *sta;
	struct iwl_mvm_sta *mvmsta;
	unsigned long tid_bitmap;
	unsigned long agg_tids = 0;
	s8 sta_id;
	int tid;

	lockdep_assert_held(&mvm->mutex);

	spin_lock_bh(&mvm->queue_info_lock);
	sta_id = mvm->queue_info[queue].ra_sta_id;
	tid_bitmap = mvm->queue_info[queue].tid_bitmap;
	spin_unlock_bh(&mvm->queue_info_lock);

	sta = rcu_dereference_protected(mvm->fw_id_to_mac_id[sta_id],
					lockdep_is_held(&mvm->mutex));

	if (WARN_ON_ONCE(IS_ERR_OR_NULL(sta)))
		return -EINVAL;

	mvmsta = iwl_mvm_sta_from_mac80211(sta);

	spin_lock_bh(&mvmsta->lock);
	for_each_set_bit(tid, &tid_bitmap, IWL_MAX_TID_COUNT + 1) {
		if (mvmsta->tid_data[tid].state == IWL_AGG_ON)
			agg_tids |= BIT(tid);
	}
	spin_unlock_bh(&mvmsta->lock);

	return agg_tids;
}

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/*
 * Remove a queue from a station's resources.
 * Note that this only marks as free. It DOESN'T delete a BA agreement, and
 * doesn't disable the queue
 */
static int iwl_mvm_remove_sta_queue_marking(struct iwl_mvm *mvm, int queue)
{
	struct ieee80211_sta *sta;
	struct iwl_mvm_sta *mvmsta;
	unsigned long tid_bitmap;
	unsigned long disable_agg_tids = 0;
	u8 sta_id;
	int tid;

	lockdep_assert_held(&mvm->mutex);

	spin_lock_bh(&mvm->queue_info_lock);
	sta_id = mvm->queue_info[queue].ra_sta_id;
	tid_bitmap = mvm->queue_info[queue].tid_bitmap;
	spin_unlock_bh(&mvm->queue_info_lock);

	rcu_read_lock();

	sta = rcu_dereference(mvm->fw_id_to_mac_id[sta_id]);

	if (WARN_ON_ONCE(IS_ERR_OR_NULL(sta))) {
		rcu_read_unlock();
		return 0;
	}

	mvmsta = iwl_mvm_sta_from_mac80211(sta);

	spin_lock_bh(&mvmsta->lock);
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	/* Unmap MAC queues and TIDs from this queue */
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	for_each_set_bit(tid, &tid_bitmap, IWL_MAX_TID_COUNT + 1) {
		if (mvmsta->tid_data[tid].state == IWL_AGG_ON)
			disable_agg_tids |= BIT(tid);
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		mvmsta->tid_data[tid].txq_id = IEEE80211_INVAL_HW_QUEUE;
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	}

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	mvmsta->tfd_queue_msk &= ~BIT(queue); /* Don't use this queue anymore */
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	spin_unlock_bh(&mvmsta->lock);

	rcu_read_unlock();

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	spin_lock_bh(&mvm->queue_info_lock);
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	/* Unmap MAC queues and TIDs from this queue */
	mvm->queue_info[queue].hw_queue_to_mac80211 = 0;
	mvm->queue_info[queue].hw_queue_refcount = 0;
	mvm->queue_info[queue].tid_bitmap = 0;
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	spin_unlock_bh(&mvm->queue_info_lock);
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	return disable_agg_tids;
}

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static int iwl_mvm_get_shared_queue(struct iwl_mvm *mvm,
				    unsigned long tfd_queue_mask, u8 ac)
{
	int queue = 0;
	u8 ac_to_queue[IEEE80211_NUM_ACS];
	int i;

	lockdep_assert_held(&mvm->queue_info_lock);

	memset(&ac_to_queue, IEEE80211_INVAL_HW_QUEUE, sizeof(ac_to_queue));

	/* See what ACs the existing queues for this STA have */
	for_each_set_bit(i, &tfd_queue_mask, IWL_MVM_DQA_MAX_DATA_QUEUE) {
		/* Only DATA queues can be shared */
		if (i < IWL_MVM_DQA_MIN_DATA_QUEUE &&
		    i != IWL_MVM_DQA_BSS_CLIENT_QUEUE)
			continue;

		ac_to_queue[mvm->queue_info[i].mac80211_ac] = i;
	}

	/*
	 * The queue to share is chosen only from DATA queues as follows (in
	 * descending priority):
	 * 1. An AC_BE queue
	 * 2. Same AC queue
	 * 3. Highest AC queue that is lower than new AC
	 * 4. Any existing AC (there always is at least 1 DATA queue)
	 */

	/* Priority 1: An AC_BE queue */
	if (ac_to_queue[IEEE80211_AC_BE] != IEEE80211_INVAL_HW_QUEUE)
		queue = ac_to_queue[IEEE80211_AC_BE];
	/* Priority 2: Same AC queue */
	else if (ac_to_queue[ac] != IEEE80211_INVAL_HW_QUEUE)
		queue = ac_to_queue[ac];
	/* Priority 3a: If new AC is VO and VI exists - use VI */
	else if (ac == IEEE80211_AC_VO &&
		 ac_to_queue[IEEE80211_AC_VI] != IEEE80211_INVAL_HW_QUEUE)
		queue = ac_to_queue[IEEE80211_AC_VI];
	/* Priority 3b: No BE so only AC less than the new one is BK */
	else if (ac_to_queue[IEEE80211_AC_BK] != IEEE80211_INVAL_HW_QUEUE)
		queue = ac_to_queue[IEEE80211_AC_BK];
	/* Priority 4a: No BE nor BK - use VI if exists */
	else if (ac_to_queue[IEEE80211_AC_VI] != IEEE80211_INVAL_HW_QUEUE)
		queue = ac_to_queue[IEEE80211_AC_VI];
	/* Priority 4b: No BE, BK nor VI - use VO if exists */
	else if (ac_to_queue[IEEE80211_AC_VO] != IEEE80211_INVAL_HW_QUEUE)
		queue = ac_to_queue[IEEE80211_AC_VO];

	/* Make sure queue found (or not) is legal */
	if (!((queue >= IWL_MVM_DQA_MIN_MGMT_QUEUE &&
	       queue <= IWL_MVM_DQA_MAX_MGMT_QUEUE) ||
	      (queue >= IWL_MVM_DQA_MIN_DATA_QUEUE &&
	       queue <= IWL_MVM_DQA_MAX_DATA_QUEUE) ||
	      (queue == IWL_MVM_DQA_BSS_CLIENT_QUEUE))) {
		IWL_ERR(mvm, "No DATA queues available to share\n");
		queue = -ENOSPC;
	}

	return queue;
}

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static int iwl_mvm_sta_alloc_queue(struct iwl_mvm *mvm,
				   struct ieee80211_sta *sta, u8 ac, int tid,
				   struct ieee80211_hdr *hdr)
{
	struct iwl_mvm_sta *mvmsta = iwl_mvm_sta_from_mac80211(sta);
	struct iwl_trans_txq_scd_cfg cfg = {
		.fifo = iwl_mvm_ac_to_tx_fifo[ac],
		.sta_id = mvmsta->sta_id,
		.tid = tid,
		.frame_limit = IWL_FRAME_LIMIT,
	};
	unsigned int wdg_timeout =
		iwl_mvm_get_wd_timeout(mvm, mvmsta->vif, false, false);
	u8 mac_queue = mvmsta->vif->hw_queue[ac];
	int queue = -1;
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	bool using_inactive_queue = false;
	unsigned long disable_agg_tids = 0;
	enum iwl_mvm_agg_state queue_state;
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	bool shared_queue = false;
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	int ssn;
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	unsigned long tfd_queue_mask;
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	int ret;
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	lockdep_assert_held(&mvm->mutex);

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	spin_lock_bh(&mvmsta->lock);
	tfd_queue_mask = mvmsta->tfd_queue_msk;
	spin_unlock_bh(&mvmsta->lock);

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	spin_lock_bh(&mvm->queue_info_lock);
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	/*
	 * Non-QoS, QoS NDP and MGMT frames should go to a MGMT queue, if one
	 * exists
	 */
	if (!ieee80211_is_data_qos(hdr->frame_control) ||
	    ieee80211_is_qos_nullfunc(hdr->frame_control)) {
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		queue = iwl_mvm_find_free_queue(mvm, mvmsta->sta_id,
						IWL_MVM_DQA_MIN_MGMT_QUEUE,
555 556 557 558 559 560 561 562
						IWL_MVM_DQA_MAX_MGMT_QUEUE);
		if (queue >= IWL_MVM_DQA_MIN_MGMT_QUEUE)
			IWL_DEBUG_TX_QUEUES(mvm, "Found free MGMT queue #%d\n",
					    queue);

		/* If no such queue is found, we'll use a DATA queue instead */
	}

563 564 565 566 567
	if ((queue < 0 && mvmsta->reserved_queue != IEEE80211_INVAL_HW_QUEUE) &&
	    (mvm->queue_info[mvmsta->reserved_queue].status ==
	     IWL_MVM_QUEUE_RESERVED ||
	     mvm->queue_info[mvmsta->reserved_queue].status ==
	     IWL_MVM_QUEUE_INACTIVE)) {
568
		queue = mvmsta->reserved_queue;
569
		mvm->queue_info[queue].reserved = true;
570 571 572 573
		IWL_DEBUG_TX_QUEUES(mvm, "Using reserved queue #%d\n", queue);
	}

	if (queue < 0)
574 575
		queue = iwl_mvm_find_free_queue(mvm, mvmsta->sta_id,
						IWL_MVM_DQA_MIN_DATA_QUEUE,
576
						IWL_MVM_DQA_MAX_DATA_QUEUE);
577

578 579 580 581 582 583 584 585 586 587 588 589 590 591 592
	/*
	 * Check if this queue is already allocated but inactive.
	 * In such a case, we'll need to first free this queue before enabling
	 * it again, so we'll mark it as reserved to make sure no new traffic
	 * arrives on it
	 */
	if (queue > 0 &&
	    mvm->queue_info[queue].status == IWL_MVM_QUEUE_INACTIVE) {
		mvm->queue_info[queue].status = IWL_MVM_QUEUE_RESERVED;
		using_inactive_queue = true;
		IWL_DEBUG_TX_QUEUES(mvm,
				    "Re-assigning TXQ %d: sta_id=%d, tid=%d\n",
				    queue, mvmsta->sta_id, tid);
	}

593 594 595 596 597 598 599 600 601
	/* No free queue - we'll have to share */
	if (queue <= 0) {
		queue = iwl_mvm_get_shared_queue(mvm, tfd_queue_mask, ac);
		if (queue > 0) {
			shared_queue = true;
			mvm->queue_info[queue].status = IWL_MVM_QUEUE_SHARED;
		}
	}

602 603 604 605 606 607
	/*
	 * Mark TXQ as ready, even though it hasn't been fully configured yet,
	 * to make sure no one else takes it.
	 * This will allow avoiding re-acquiring the lock at the end of the
	 * configuration. On error we'll mark it back as free.
	 */
608
	if ((queue > 0) && !shared_queue)
609
		mvm->queue_info[queue].status = IWL_MVM_QUEUE_READY;
610

611
	spin_unlock_bh(&mvm->queue_info_lock);
612

613 614 615 616
	/* This shouldn't happen - out of queues */
	if (WARN_ON(queue <= 0)) {
		IWL_ERR(mvm, "No available queues for tid %d on sta_id %d\n",
			tid, cfg.sta_id);
617
		return -ENOSPC;
618
	}
619 620 621 622 623 624 625

	/*
	 * Actual en/disablement of aggregations is through the ADD_STA HCMD,
	 * but for configuring the SCD to send A-MPDUs we need to mark the queue
	 * as aggregatable.
	 * Mark all DATA queues as allowing to be aggregated at some point
	 */
626 627
	cfg.aggregate = (queue >= IWL_MVM_DQA_MIN_DATA_QUEUE ||
			 queue == IWL_MVM_DQA_BSS_CLIENT_QUEUE);
628

629 630 631 632 633 634 635 636 637
	/*
	 * If this queue was previously inactive (idle) - we need to free it
	 * first
	 */
	if (using_inactive_queue) {
		struct iwl_scd_txq_cfg_cmd cmd = {
			.scd_queue = queue,
			.enable = 0,
		};
638
		u8 ac;
639 640 641

		disable_agg_tids = iwl_mvm_remove_sta_queue_marking(mvm, queue);

642 643 644 645 646 647
		spin_lock_bh(&mvm->queue_info_lock);
		ac = mvm->queue_info[queue].mac80211_ac;
		cmd.sta_id = mvm->queue_info[queue].ra_sta_id;
		cmd.tx_fifo = iwl_mvm_ac_to_tx_fifo[ac];
		spin_unlock_bh(&mvm->queue_info_lock);

648 649 650 651 652 653 654 655 656 657 658 659 660 661 662 663 664 665 666 667
		/* Disable the queue */
		iwl_mvm_invalidate_sta_queue(mvm, queue, disable_agg_tids,
					     true);
		iwl_trans_txq_disable(mvm->trans, queue, false);
		ret = iwl_mvm_send_cmd_pdu(mvm, SCD_QUEUE_CFG, 0, sizeof(cmd),
					   &cmd);
		if (ret) {
			IWL_ERR(mvm,
				"Failed to free inactive queue %d (ret=%d)\n",
				queue, ret);

			/* Re-mark the inactive queue as inactive */
			spin_lock_bh(&mvm->queue_info_lock);
			mvm->queue_info[queue].status = IWL_MVM_QUEUE_INACTIVE;
			spin_unlock_bh(&mvm->queue_info_lock);

			return ret;
		}
	}

668 669 670 671 672 673 674 675 676 677 678 679 680 681 682 683 684 685 686 687 688
	IWL_DEBUG_TX_QUEUES(mvm,
			    "Allocating %squeue #%d to sta %d on tid %d\n",
			    shared_queue ? "shared " : "", queue,
			    mvmsta->sta_id, tid);

	if (shared_queue) {
		/* Disable any open aggs on this queue */
		disable_agg_tids = iwl_mvm_get_queue_agg_tids(mvm, queue);

		if (disable_agg_tids) {
			IWL_DEBUG_TX_QUEUES(mvm, "Disabling aggs on queue %d\n",
					    queue);
			iwl_mvm_invalidate_sta_queue(mvm, queue,
						     disable_agg_tids, false);
		}

		/* Mark queue as shared in transport */
		iwl_trans_txq_set_shared_mode(mvm->trans, queue, true);

		/* TODO: a redirection may be required - DQA phase 2 */
	}
689 690 691 692 693 694 695

	ssn = IEEE80211_SEQ_TO_SN(le16_to_cpu(hdr->seq_ctrl));
	iwl_mvm_enable_txq(mvm, queue, mac_queue, ssn, &cfg,
			   wdg_timeout);

	spin_lock_bh(&mvmsta->lock);
	mvmsta->tid_data[tid].txq_id = queue;
696
	mvmsta->tid_data[tid].is_tid_active = true;
697
	mvmsta->tfd_queue_msk |= BIT(queue);
698
	queue_state = mvmsta->tid_data[tid].state;
699 700 701 702 703

	if (mvmsta->reserved_queue == queue)
		mvmsta->reserved_queue = IEEE80211_INVAL_HW_QUEUE;
	spin_unlock_bh(&mvmsta->lock);

704 705 706 707
	if (!shared_queue) {
		ret = iwl_mvm_sta_send_to_fw(mvm, sta, true, STA_MODIFY_QUEUES);
		if (ret)
			goto out_err;
708

709 710 711 712 713 714 715
		/* If we need to re-enable aggregations... */
		if (queue_state == IWL_AGG_ON) {
			ret = iwl_mvm_sta_tx_agg(mvm, sta, tid, queue, true);
			if (ret)
				goto out_err;
		}
	}
716

717
	return 0;
718 719 720 721 722

out_err:
	iwl_mvm_disable_txq(mvm, queue, mac_queue, tid, 0);

	return ret;
723 724 725 726 727 728 729 730 731 732 733 734 735 736 737 738 739 740 741 742 743 744 745 746 747 748 749 750 751 752 753 754 755 756 757 758 759 760 761 762 763 764 765 766 767 768 769
}

static inline u8 iwl_mvm_tid_to_ac_queue(int tid)
{
	if (tid == IWL_MAX_TID_COUNT)
		return IEEE80211_AC_VO; /* MGMT */

	return tid_to_mac80211_ac[tid];
}

static void iwl_mvm_tx_deferred_stream(struct iwl_mvm *mvm,
				       struct ieee80211_sta *sta, int tid)
{
	struct iwl_mvm_sta *mvmsta = iwl_mvm_sta_from_mac80211(sta);
	struct iwl_mvm_tid_data *tid_data = &mvmsta->tid_data[tid];
	struct sk_buff *skb;
	struct ieee80211_hdr *hdr;
	struct sk_buff_head deferred_tx;
	u8 mac_queue;
	bool no_queue = false; /* Marks if there is a problem with the queue */
	u8 ac;

	lockdep_assert_held(&mvm->mutex);

	skb = skb_peek(&tid_data->deferred_tx_frames);
	if (!skb)
		return;
	hdr = (void *)skb->data;

	ac = iwl_mvm_tid_to_ac_queue(tid);
	mac_queue = IEEE80211_SKB_CB(skb)->hw_queue;

	if (tid_data->txq_id == IEEE80211_INVAL_HW_QUEUE &&
	    iwl_mvm_sta_alloc_queue(mvm, sta, ac, tid, hdr)) {
		IWL_ERR(mvm,
			"Can't alloc TXQ for sta %d tid %d - dropping frame\n",
			mvmsta->sta_id, tid);

		/*
		 * Mark queue as problematic so later the deferred traffic is
		 * freed, as we can do nothing with it
		 */
		no_queue = true;
	}

	__skb_queue_head_init(&deferred_tx);

770 771
	/* Disable bottom-halves when entering TX path */
	local_bh_disable();
772 773 774 775 776 777 778 779 780 781 782 783 784 785 786 787 788 789 790 791 792 793
	spin_lock(&mvmsta->lock);
	skb_queue_splice_init(&tid_data->deferred_tx_frames, &deferred_tx);
	spin_unlock(&mvmsta->lock);

	while ((skb = __skb_dequeue(&deferred_tx)))
		if (no_queue || iwl_mvm_tx_skb(mvm, skb, sta))
			ieee80211_free_txskb(mvm->hw, skb);
	local_bh_enable();

	/* Wake queue */
	iwl_mvm_start_mac_queues(mvm, BIT(mac_queue));
}

void iwl_mvm_add_new_dqa_stream_wk(struct work_struct *wk)
{
	struct iwl_mvm *mvm = container_of(wk, struct iwl_mvm,
					   add_stream_wk);
	struct ieee80211_sta *sta;
	struct iwl_mvm_sta *mvmsta;
	unsigned long deferred_tid_traffic;
	int sta_id, tid;

794 795 796
	/* Check inactivity of queues */
	iwl_mvm_inactivity_check(mvm);

797 798 799 800 801 802 803 804 805 806 807 808 809 810 811 812 813 814 815 816 817 818 819
	mutex_lock(&mvm->mutex);

	/* Go over all stations with deferred traffic */
	for_each_set_bit(sta_id, mvm->sta_deferred_frames,
			 IWL_MVM_STATION_COUNT) {
		clear_bit(sta_id, mvm->sta_deferred_frames);
		sta = rcu_dereference_protected(mvm->fw_id_to_mac_id[sta_id],
						lockdep_is_held(&mvm->mutex));
		if (IS_ERR_OR_NULL(sta))
			continue;

		mvmsta = iwl_mvm_sta_from_mac80211(sta);
		deferred_tid_traffic = mvmsta->deferred_traffic_tid_map;

		for_each_set_bit(tid, &deferred_tid_traffic,
				 IWL_MAX_TID_COUNT + 1)
			iwl_mvm_tx_deferred_stream(mvm, sta, tid);
	}

	mutex_unlock(&mvm->mutex);
}

static int iwl_mvm_reserve_sta_stream(struct iwl_mvm *mvm,
820 821
				      struct ieee80211_sta *sta,
				      enum nl80211_iftype vif_type)
822 823 824 825
{
	struct iwl_mvm_sta *mvmsta = iwl_mvm_sta_from_mac80211(sta);
	int queue;

826 827 828 829 830 831
	/*
	 * Check for inactive queues, so we don't reach a situation where we
	 * can't add a STA due to a shortage in queues that doesn't really exist
	 */
	iwl_mvm_inactivity_check(mvm);

832 833 834
	spin_lock_bh(&mvm->queue_info_lock);

	/* Make sure we have free resources for this STA */
835 836
	if (vif_type == NL80211_IFTYPE_STATION && !sta->tdls &&
	    !mvm->queue_info[IWL_MVM_DQA_BSS_CLIENT_QUEUE].hw_queue_refcount &&
837 838
	    (mvm->queue_info[IWL_MVM_DQA_BSS_CLIENT_QUEUE].status ==
	     IWL_MVM_QUEUE_FREE))
839 840
		queue = IWL_MVM_DQA_BSS_CLIENT_QUEUE;
	else
841 842
		queue = iwl_mvm_find_free_queue(mvm, mvmsta->sta_id,
						IWL_MVM_DQA_MIN_DATA_QUEUE,
843
						IWL_MVM_DQA_MAX_DATA_QUEUE);
844 845 846 847 848
	if (queue < 0) {
		spin_unlock_bh(&mvm->queue_info_lock);
		IWL_ERR(mvm, "No available queues for new station\n");
		return -ENOSPC;
	}
849
	mvm->queue_info[queue].status = IWL_MVM_QUEUE_RESERVED;
850 851 852 853 854 855 856 857 858 859 860

	spin_unlock_bh(&mvm->queue_info_lock);

	mvmsta->reserved_queue = queue;

	IWL_DEBUG_TX_QUEUES(mvm, "Reserving data queue #%d for sta_id %d\n",
			    queue, mvmsta->sta_id);

	return 0;
}

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Johannes Berg 已提交
861 862 863 864 865
int iwl_mvm_add_sta(struct iwl_mvm *mvm,
		    struct ieee80211_vif *vif,
		    struct ieee80211_sta *sta)
{
	struct iwl_mvm_vif *mvmvif = iwl_mvm_vif_from_mac80211(vif);
866
	struct iwl_mvm_sta *mvm_sta = iwl_mvm_sta_from_mac80211(sta);
867
	struct iwl_mvm_rxq_dup_data *dup_data;
J
Johannes Berg 已提交
868 869 870 871 872
	int i, ret, sta_id;

	lockdep_assert_held(&mvm->mutex);

	if (!test_bit(IWL_MVM_STATUS_IN_HW_RESTART, &mvm->status))
873 874
		sta_id = iwl_mvm_find_free_sta_id(mvm,
						  ieee80211_vif_type_p2p(vif));
J
Johannes Berg 已提交
875 876 877
	else
		sta_id = mvm_sta->sta_id;

878
	if (sta_id == IWL_MVM_STATION_COUNT)
J
Johannes Berg 已提交
879 880 881 882 883 884 885 886 887
		return -ENOSPC;

	spin_lock_init(&mvm_sta->lock);

	mvm_sta->sta_id = sta_id;
	mvm_sta->mac_id_n_color = FW_CMD_ID_AND_COLOR(mvmvif->id,
						      mvmvif->color);
	mvm_sta->vif = vif;
	mvm_sta->max_agg_bufsize = LINK_QUAL_AGG_FRAME_LIMIT_DEF;
888 889
	mvm_sta->tx_protection = 0;
	mvm_sta->tt_tx_protection = false;
J
Johannes Berg 已提交
890 891

	/* HW restart, don't assume the memory has been zeroed */
892
	atomic_set(&mvm->pending_frames[sta_id], 0);
893
	mvm_sta->tid_disable_agg = 0xffff; /* No aggs at first */
J
Johannes Berg 已提交
894
	mvm_sta->tfd_queue_msk = 0;
895 896 897 898 899 900

	/* allocate new queues for a TDLS station */
	if (sta->tdls) {
		ret = iwl_mvm_tdls_sta_init(mvm, sta);
		if (ret)
			return ret;
901
	} else if (!iwl_mvm_is_dqa_supported(mvm)) {
902 903 904 905
		for (i = 0; i < IEEE80211_NUM_ACS; i++)
			if (vif->hw_queue[i] != IEEE80211_INVAL_HW_QUEUE)
				mvm_sta->tfd_queue_msk |= BIT(vif->hw_queue[i]);
	}
J
Johannes Berg 已提交
906

907
	/* for HW restart - reset everything but the sequence number */
908
	for (i = 0; i <= IWL_MAX_TID_COUNT; i++) {
909 910 911
		u16 seq = mvm_sta->tid_data[i].seq_number;
		memset(&mvm_sta->tid_data[i], 0, sizeof(mvm_sta->tid_data[i]));
		mvm_sta->tid_data[i].seq_number = seq;
912 913 914 915 916 917 918 919 920 921

		if (!iwl_mvm_is_dqa_supported(mvm))
			continue;

		/*
		 * Mark all queues for this STA as unallocated and defer TX
		 * frames until the queue is allocated
		 */
		mvm_sta->tid_data[i].txq_id = IEEE80211_INVAL_HW_QUEUE;
		skb_queue_head_init(&mvm_sta->tid_data[i].deferred_tx_frames);
922
	}
923
	mvm_sta->deferred_traffic_tid_map = 0;
924
	mvm_sta->agg_tids = 0;
J
Johannes Berg 已提交
925

926 927 928 929 930 931 932 933 934 935
	if (iwl_mvm_has_new_rx_api(mvm) &&
	    !test_bit(IWL_MVM_STATUS_IN_HW_RESTART, &mvm->status)) {
		dup_data = kcalloc(mvm->trans->num_rx_queues,
				   sizeof(*dup_data),
				   GFP_KERNEL);
		if (!dup_data)
			return -ENOMEM;
		mvm_sta->dup_data = dup_data;
	}

936
	if (iwl_mvm_is_dqa_supported(mvm)) {
937 938
		ret = iwl_mvm_reserve_sta_stream(mvm, sta,
						 ieee80211_vif_type_p2p(vif));
939 940 941 942 943
		if (ret)
			goto err;
	}

	ret = iwl_mvm_sta_send_to_fw(mvm, sta, false, 0);
J
Johannes Berg 已提交
944
	if (ret)
945
		goto err;
J
Johannes Berg 已提交
946

947 948 949 950 951 952 953 954
	if (vif->type == NL80211_IFTYPE_STATION) {
		if (!sta->tdls) {
			WARN_ON(mvmvif->ap_sta_id != IWL_MVM_STATION_COUNT);
			mvmvif->ap_sta_id = sta_id;
		} else {
			WARN_ON(mvmvif->ap_sta_id == IWL_MVM_STATION_COUNT);
		}
	}
J
Johannes Berg 已提交
955 956 957 958

	rcu_assign_pointer(mvm->fw_id_to_mac_id[sta_id], sta);

	return 0;
959 960 961 962

err:
	iwl_mvm_tdls_sta_deinit(mvm, sta);
	return ret;
J
Johannes Berg 已提交
963 964
}

965 966 967 968
int iwl_mvm_update_sta(struct iwl_mvm *mvm,
		       struct ieee80211_vif *vif,
		       struct ieee80211_sta *sta)
{
969
	return iwl_mvm_sta_send_to_fw(mvm, sta, true, 0);
970 971
}

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Johannes Berg 已提交
972 973 974
int iwl_mvm_drain_sta(struct iwl_mvm *mvm, struct iwl_mvm_sta *mvmsta,
		      bool drain)
{
975
	struct iwl_mvm_add_sta_cmd cmd = {};
J
Johannes Berg 已提交
976 977 978 979 980 981 982 983 984 985 986 987
	int ret;
	u32 status;

	lockdep_assert_held(&mvm->mutex);

	cmd.mac_id_n_color = cpu_to_le32(mvmsta->mac_id_n_color);
	cmd.sta_id = mvmsta->sta_id;
	cmd.add_modify = STA_MODE_MODIFY;
	cmd.station_flags = drain ? cpu_to_le32(STA_FLG_DRAIN_FLOW) : 0;
	cmd.station_flags_msk = cpu_to_le32(STA_FLG_DRAIN_FLOW);

	status = ADD_STA_SUCCESS;
988 989
	ret = iwl_mvm_send_cmd_pdu_status(mvm, ADD_STA,
					  iwl_mvm_add_sta_cmd_size(mvm),
990
					  &cmd, &status);
J
Johannes Berg 已提交
991 992 993
	if (ret)
		return ret;

994
	switch (status & IWL_ADD_STA_STATUS_MASK) {
J
Johannes Berg 已提交
995 996 997 998 999 1000 1001 1002 1003 1004 1005 1006 1007 1008 1009 1010 1011 1012 1013 1014 1015 1016 1017 1018 1019 1020 1021 1022 1023 1024 1025 1026 1027 1028 1029 1030
	case ADD_STA_SUCCESS:
		IWL_DEBUG_INFO(mvm, "Frames for staid %d will drained in fw\n",
			       mvmsta->sta_id);
		break;
	default:
		ret = -EIO;
		IWL_ERR(mvm, "Couldn't drain frames for staid %d\n",
			mvmsta->sta_id);
		break;
	}

	return ret;
}

/*
 * Remove a station from the FW table. Before sending the command to remove
 * the station validate that the station is indeed known to the driver (sanity
 * only).
 */
static int iwl_mvm_rm_sta_common(struct iwl_mvm *mvm, u8 sta_id)
{
	struct ieee80211_sta *sta;
	struct iwl_mvm_rm_sta_cmd rm_sta_cmd = {
		.sta_id = sta_id,
	};
	int ret;

	sta = rcu_dereference_protected(mvm->fw_id_to_mac_id[sta_id],
					lockdep_is_held(&mvm->mutex));

	/* Note: internal stations are marked as error values */
	if (!sta) {
		IWL_ERR(mvm, "Invalid station id\n");
		return -EINVAL;
	}

E
Emmanuel Grumbach 已提交
1031
	ret = iwl_mvm_send_cmd_pdu(mvm, REMOVE_STA, 0,
J
Johannes Berg 已提交
1032 1033 1034 1035 1036 1037 1038 1039 1040 1041 1042 1043 1044 1045 1046 1047 1048 1049 1050 1051 1052 1053 1054 1055 1056 1057 1058 1059 1060
				   sizeof(rm_sta_cmd), &rm_sta_cmd);
	if (ret) {
		IWL_ERR(mvm, "Failed to remove station. Id=%d\n", sta_id);
		return ret;
	}

	return 0;
}

void iwl_mvm_sta_drained_wk(struct work_struct *wk)
{
	struct iwl_mvm *mvm = container_of(wk, struct iwl_mvm, sta_drained_wk);
	u8 sta_id;

	/*
	 * The mutex is needed because of the SYNC cmd, but not only: if the
	 * work would run concurrently with iwl_mvm_rm_sta, it would run before
	 * iwl_mvm_rm_sta sets the station as busy, and exit. Then
	 * iwl_mvm_rm_sta would set the station as busy, and nobody will clean
	 * that later.
	 */
	mutex_lock(&mvm->mutex);

	for_each_set_bit(sta_id, mvm->sta_drained, IWL_MVM_STATION_COUNT) {
		int ret;
		struct ieee80211_sta *sta =
			rcu_dereference_protected(mvm->fw_id_to_mac_id[sta_id],
						  lockdep_is_held(&mvm->mutex));

1061 1062 1063 1064 1065 1066 1067 1068 1069
		/*
		 * This station is in use or RCU-removed; the latter happens in
		 * managed mode, where mac80211 removes the station before we
		 * can remove it from firmware (we can only do that after the
		 * MAC is marked unassociated), and possibly while the deauth
		 * frame to disconnect from the AP is still queued. Then, the
		 * station pointer is -ENOENT when the last skb is reclaimed.
		 */
		if (!IS_ERR(sta) || PTR_ERR(sta) == -ENOENT)
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Johannes Berg 已提交
1070 1071 1072 1073 1074 1075 1076 1077 1078 1079 1080 1081 1082 1083 1084 1085 1086 1087 1088 1089 1090 1091 1092 1093 1094
			continue;

		if (PTR_ERR(sta) == -EINVAL) {
			IWL_ERR(mvm, "Drained sta %d, but it is internal?\n",
				sta_id);
			continue;
		}

		if (!sta) {
			IWL_ERR(mvm, "Drained sta %d, but it was NULL?\n",
				sta_id);
			continue;
		}

		WARN_ON(PTR_ERR(sta) != -EBUSY);
		/* This station was removed and we waited until it got drained,
		 * we can now proceed and remove it.
		 */
		ret = iwl_mvm_rm_sta_common(mvm, sta_id);
		if (ret) {
			IWL_ERR(mvm,
				"Couldn't remove sta %d after it was drained\n",
				sta_id);
			continue;
		}
1095
		RCU_INIT_POINTER(mvm->fw_id_to_mac_id[sta_id], NULL);
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		clear_bit(sta_id, mvm->sta_drained);
1097 1098 1099 1100

		if (mvm->tfd_drained[sta_id]) {
			unsigned long i, msk = mvm->tfd_drained[sta_id];

1101
			for_each_set_bit(i, &msk, sizeof(msk) * BITS_PER_BYTE)
1102 1103
				iwl_mvm_disable_txq(mvm, i, i,
						    IWL_MAX_TID_COUNT, 0);
1104 1105 1106 1107 1108

			mvm->tfd_drained[sta_id] = 0;
			IWL_DEBUG_TDLS(mvm, "Drained sta %d, with queues %ld\n",
				       sta_id, msk);
		}
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	}

	mutex_unlock(&mvm->mutex);
}

1114 1115 1116 1117 1118 1119 1120 1121 1122 1123 1124 1125 1126 1127 1128 1129 1130 1131 1132 1133
static void iwl_mvm_disable_sta_queues(struct iwl_mvm *mvm,
				       struct ieee80211_vif *vif,
				       struct iwl_mvm_sta *mvm_sta)
{
	int ac;
	int i;

	lockdep_assert_held(&mvm->mutex);

	for (i = 0; i < ARRAY_SIZE(mvm_sta->tid_data); i++) {
		if (mvm_sta->tid_data[i].txq_id == IEEE80211_INVAL_HW_QUEUE)
			continue;

		ac = iwl_mvm_tid_to_ac_queue(i);
		iwl_mvm_disable_txq(mvm, mvm_sta->tid_data[i].txq_id,
				    vif->hw_queue[ac], i, 0);
		mvm_sta->tid_data[i].txq_id = IEEE80211_INVAL_HW_QUEUE;
	}
}

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int iwl_mvm_rm_sta(struct iwl_mvm *mvm,
		   struct ieee80211_vif *vif,
		   struct ieee80211_sta *sta)
{
	struct iwl_mvm_vif *mvmvif = iwl_mvm_vif_from_mac80211(vif);
1139
	struct iwl_mvm_sta *mvm_sta = iwl_mvm_sta_from_mac80211(sta);
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	int ret;

	lockdep_assert_held(&mvm->mutex);

1144 1145 1146
	if (iwl_mvm_has_new_rx_api(mvm))
		kfree(mvm_sta->dup_data);

1147 1148 1149
	if ((vif->type == NL80211_IFTYPE_STATION &&
	     mvmvif->ap_sta_id == mvm_sta->sta_id) ||
	    iwl_mvm_is_dqa_supported(mvm)){
1150 1151 1152
		ret = iwl_mvm_drain_sta(mvm, mvm_sta, true);
		if (ret)
			return ret;
1153
		/* flush its queues here since we are freeing mvm_sta */
1154
		ret = iwl_mvm_flush_tx_path(mvm, mvm_sta->tfd_queue_msk, 0);
1155 1156 1157 1158 1159 1160 1161
		if (ret)
			return ret;
		ret = iwl_trans_wait_tx_queue_empty(mvm->trans,
						    mvm_sta->tfd_queue_msk);
		if (ret)
			return ret;
		ret = iwl_mvm_drain_sta(mvm, mvm_sta, false);
1162

1163 1164 1165 1166
		/* If DQA is supported - the queues can be disabled now */
		if (iwl_mvm_is_dqa_supported(mvm))
			iwl_mvm_disable_sta_queues(mvm, vif, mvm_sta);

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		/* if we are associated - we can't remove the AP STA now */
		if (vif->bss_conf.assoc)
			return ret;

		/* unassoc - go ahead - remove the AP STA now */
		mvmvif->ap_sta_id = IWL_MVM_STATION_COUNT;
1173 1174 1175 1176

		/* clear d0i3_ap_sta_id if no longer relevant */
		if (mvm->d0i3_ap_sta_id == mvm_sta->sta_id)
			mvm->d0i3_ap_sta_id = IWL_MVM_STATION_COUNT;
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	}

1179 1180 1181 1182 1183 1184 1185 1186 1187
	/*
	 * This shouldn't happen - the TDLS channel switch should be canceled
	 * before the STA is removed.
	 */
	if (WARN_ON_ONCE(mvm->tdls_cs.peer.sta_id == mvm_sta->sta_id)) {
		mvm->tdls_cs.peer.sta_id = IWL_MVM_STATION_COUNT;
		cancel_delayed_work(&mvm->tdls_cs.dwork);
	}

1188 1189 1190 1191 1192
	/*
	 * Make sure that the tx response code sees the station as -EBUSY and
	 * calls the drain worker.
	 */
	spin_lock_bh(&mvm_sta->lock);
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	/*
	 * There are frames pending on the AC queues for this station.
	 * We need to wait until all the frames are drained...
	 */
1197
	if (atomic_read(&mvm->pending_frames[mvm_sta->sta_id])) {
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		rcu_assign_pointer(mvm->fw_id_to_mac_id[mvm_sta->sta_id],
				   ERR_PTR(-EBUSY));
1200
		spin_unlock_bh(&mvm_sta->lock);
1201 1202 1203 1204 1205 1206 1207 1208 1209

		/* disable TDLS sta queues on drain complete */
		if (sta->tdls) {
			mvm->tfd_drained[mvm_sta->sta_id] =
							mvm_sta->tfd_queue_msk;
			IWL_DEBUG_TDLS(mvm, "Draining TDLS sta %d\n",
				       mvm_sta->sta_id);
		}

1210
		ret = iwl_mvm_drain_sta(mvm, mvm_sta, true);
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	} else {
1212
		spin_unlock_bh(&mvm_sta->lock);
1213 1214 1215 1216

		if (sta->tdls)
			iwl_mvm_tdls_sta_deinit(mvm, sta);

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		ret = iwl_mvm_rm_sta_common(mvm, mvm_sta->sta_id);
1218
		RCU_INIT_POINTER(mvm->fw_id_to_mac_id[mvm_sta->sta_id], NULL);
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	}

	return ret;
}

int iwl_mvm_rm_sta_id(struct iwl_mvm *mvm,
		      struct ieee80211_vif *vif,
		      u8 sta_id)
{
	int ret = iwl_mvm_rm_sta_common(mvm, sta_id);

	lockdep_assert_held(&mvm->mutex);

1232
	RCU_INIT_POINTER(mvm->fw_id_to_mac_id[sta_id], NULL);
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	return ret;
}

1236 1237 1238
int iwl_mvm_allocate_int_sta(struct iwl_mvm *mvm,
			     struct iwl_mvm_int_sta *sta,
			     u32 qmask, enum nl80211_iftype iftype)
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{
	if (!test_bit(IWL_MVM_STATUS_IN_HW_RESTART, &mvm->status)) {
1241
		sta->sta_id = iwl_mvm_find_free_sta_id(mvm, iftype);
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		if (WARN_ON_ONCE(sta->sta_id == IWL_MVM_STATION_COUNT))
			return -ENOSPC;
	}

	sta->tfd_queue_msk = qmask;

	/* put a non-NULL value so iterating over the stations won't stop */
	rcu_assign_pointer(mvm->fw_id_to_mac_id[sta->sta_id], ERR_PTR(-EINVAL));
	return 0;
}

1253 1254
static void iwl_mvm_dealloc_int_sta(struct iwl_mvm *mvm,
				    struct iwl_mvm_int_sta *sta)
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{
1256
	RCU_INIT_POINTER(mvm->fw_id_to_mac_id[sta->sta_id], NULL);
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	memset(sta, 0, sizeof(struct iwl_mvm_int_sta));
	sta->sta_id = IWL_MVM_STATION_COUNT;
}

static int iwl_mvm_add_int_sta_common(struct iwl_mvm *mvm,
				      struct iwl_mvm_int_sta *sta,
				      const u8 *addr,
				      u16 mac_id, u16 color)
{
1266
	struct iwl_mvm_add_sta_cmd cmd;
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	int ret;
	u32 status;

	lockdep_assert_held(&mvm->mutex);

1272
	memset(&cmd, 0, sizeof(cmd));
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	cmd.sta_id = sta->sta_id;
	cmd.mac_id_n_color = cpu_to_le32(FW_CMD_ID_AND_COLOR(mac_id,
							     color));

	cmd.tfd_queue_msk = cpu_to_le32(sta->tfd_queue_msk);
1278
	cmd.tid_disable_tx = cpu_to_le16(0xffff);
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	if (addr)
		memcpy(cmd.addr, addr, ETH_ALEN);

1283 1284
	ret = iwl_mvm_send_cmd_pdu_status(mvm, ADD_STA,
					  iwl_mvm_add_sta_cmd_size(mvm),
1285
					  &cmd, &status);
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	if (ret)
		return ret;

1289
	switch (status & IWL_ADD_STA_STATUS_MASK) {
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	case ADD_STA_SUCCESS:
		IWL_DEBUG_INFO(mvm, "Internal station added.\n");
		return 0;
	default:
		ret = -EIO;
		IWL_ERR(mvm, "Add internal station failed, status=0x%x\n",
			status);
		break;
	}
	return ret;
}

int iwl_mvm_add_aux_sta(struct iwl_mvm *mvm)
{
1304 1305 1306
	unsigned int wdg_timeout = iwlmvm_mod_params.tfd_q_hang_detect ?
					mvm->cfg->base_params->wd_timeout :
					IWL_WATCHDOG_DISABLED;
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	int ret;

	lockdep_assert_held(&mvm->mutex);

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	/* Map Aux queue to fifo - needs to happen before adding Aux station */
1312 1313 1314
	if (!iwl_mvm_is_dqa_supported(mvm))
		iwl_mvm_enable_ac_txq(mvm, mvm->aux_queue, mvm->aux_queue,
				      IWL_MVM_TX_FIFO_MCAST, 0, wdg_timeout);
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	/* Allocate aux station and assign to it the aux queue */
	ret = iwl_mvm_allocate_int_sta(mvm, &mvm->aux_sta, BIT(mvm->aux_queue),
1318
				       NL80211_IFTYPE_UNSPECIFIED);
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	if (ret)
		return ret;

1322 1323 1324 1325 1326 1327 1328 1329 1330 1331 1332 1333 1334
	if (iwl_mvm_is_dqa_supported(mvm)) {
		struct iwl_trans_txq_scd_cfg cfg = {
			.fifo = IWL_MVM_TX_FIFO_MCAST,
			.sta_id = mvm->aux_sta.sta_id,
			.tid = IWL_MAX_TID_COUNT,
			.aggregate = false,
			.frame_limit = IWL_FRAME_LIMIT,
		};

		iwl_mvm_enable_txq(mvm, mvm->aux_queue, mvm->aux_queue, 0, &cfg,
				   wdg_timeout);
	}

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	ret = iwl_mvm_add_int_sta_common(mvm, &mvm->aux_sta, NULL,
					 MAC_INDEX_AUX, 0);

	if (ret)
		iwl_mvm_dealloc_int_sta(mvm, &mvm->aux_sta);
	return ret;
}

1343 1344 1345 1346 1347 1348 1349 1350 1351 1352 1353 1354 1355 1356 1357 1358 1359 1360 1361 1362 1363 1364 1365 1366 1367 1368 1369
int iwl_mvm_add_snif_sta(struct iwl_mvm *mvm, struct ieee80211_vif *vif)
{
	struct iwl_mvm_vif *mvmvif = iwl_mvm_vif_from_mac80211(vif);

	lockdep_assert_held(&mvm->mutex);
	return iwl_mvm_add_int_sta_common(mvm, &mvm->snif_sta, vif->addr,
					 mvmvif->id, 0);
}

int iwl_mvm_rm_snif_sta(struct iwl_mvm *mvm, struct ieee80211_vif *vif)
{
	int ret;

	lockdep_assert_held(&mvm->mutex);

	ret = iwl_mvm_rm_sta_common(mvm, mvm->snif_sta.sta_id);
	if (ret)
		IWL_WARN(mvm, "Failed sending remove station\n");

	return ret;
}

void iwl_mvm_dealloc_snif_sta(struct iwl_mvm *mvm)
{
	iwl_mvm_dealloc_int_sta(mvm, &mvm->snif_sta);
}

1370 1371 1372 1373 1374 1375 1376
void iwl_mvm_del_aux_sta(struct iwl_mvm *mvm)
{
	lockdep_assert_held(&mvm->mutex);

	iwl_mvm_dealloc_int_sta(mvm, &mvm->aux_sta);
}

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/*
 * Send the add station command for the vif's broadcast station.
 * Assumes that the station was already allocated.
 *
 * @mvm: the mvm component
 * @vif: the interface to which the broadcast station is added
 * @bsta: the broadcast station to add.
 */
1385
int iwl_mvm_send_add_bcast_sta(struct iwl_mvm *mvm, struct ieee80211_vif *vif)
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{
	struct iwl_mvm_vif *mvmvif = iwl_mvm_vif_from_mac80211(vif);
1388
	struct iwl_mvm_int_sta *bsta = &mvmvif->bcast_sta;
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	static const u8 _baddr[] = {0xFF, 0xFF, 0xFF, 0xFF, 0xFF, 0xFF};
1390
	const u8 *baddr = _baddr;
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	lockdep_assert_held(&mvm->mutex);

1394 1395 1396 1397 1398 1399 1400 1401 1402 1403 1404 1405 1406 1407 1408 1409
	if (iwl_mvm_is_dqa_supported(mvm)) {
		struct iwl_trans_txq_scd_cfg cfg = {
			.fifo = IWL_MVM_TX_FIFO_VO,
			.sta_id = mvmvif->bcast_sta.sta_id,
			.tid = IWL_MAX_TID_COUNT,
			.aggregate = false,
			.frame_limit = IWL_FRAME_LIMIT,
		};
		unsigned int wdg_timeout =
			iwl_mvm_get_wd_timeout(mvm, vif, false, false);
		int queue;

		if ((vif->type == NL80211_IFTYPE_AP) &&
		    (mvmvif->bcast_sta.tfd_queue_msk &
		     BIT(IWL_MVM_DQA_AP_PROBE_RESP_QUEUE)))
			queue = IWL_MVM_DQA_AP_PROBE_RESP_QUEUE;
1410 1411 1412 1413
		else if ((vif->type == NL80211_IFTYPE_P2P_DEVICE) &&
			 (mvmvif->bcast_sta.tfd_queue_msk &
			  BIT(IWL_MVM_DQA_P2P_DEVICE_QUEUE)))
			queue = IWL_MVM_DQA_P2P_DEVICE_QUEUE;
1414 1415 1416 1417 1418 1419 1420
		else if (WARN(1, "Missed required TXQ for adding bcast STA\n"))
			return -EINVAL;

		iwl_mvm_enable_txq(mvm, queue, vif->hw_queue[0], 0, &cfg,
				   wdg_timeout);
	}

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	if (vif->type == NL80211_IFTYPE_ADHOC)
		baddr = vif->bss_conf.bssid;

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	if (WARN_ON_ONCE(bsta->sta_id == IWL_MVM_STATION_COUNT))
		return -ENOSPC;

	return iwl_mvm_add_int_sta_common(mvm, bsta, baddr,
					  mvmvif->id, mvmvif->color);
}

/* Send the FW a request to remove the station from it's internal data
 * structures, but DO NOT remove the entry from the local data structures. */
1433
int iwl_mvm_send_rm_bcast_sta(struct iwl_mvm *mvm, struct ieee80211_vif *vif)
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{
1435
	struct iwl_mvm_vif *mvmvif = iwl_mvm_vif_from_mac80211(vif);
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	int ret;

	lockdep_assert_held(&mvm->mutex);

1440
	ret = iwl_mvm_rm_sta_common(mvm, mvmvif->bcast_sta.sta_id);
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	if (ret)
		IWL_WARN(mvm, "Failed sending remove station\n");
	return ret;
}

1446 1447 1448
int iwl_mvm_alloc_bcast_sta(struct iwl_mvm *mvm, struct ieee80211_vif *vif)
{
	struct iwl_mvm_vif *mvmvif = iwl_mvm_vif_from_mac80211(vif);
1449
	u32 qmask = 0;
1450 1451 1452

	lockdep_assert_held(&mvm->mutex);

1453 1454
	if (!iwl_mvm_is_dqa_supported(mvm))
		qmask = iwl_mvm_mac_get_queues_mask(vif);
1455

1456 1457 1458 1459 1460 1461
	if (vif->type == NL80211_IFTYPE_AP) {
		/*
		 * The firmware defines the TFD queue mask to only be relevant
		 * for *unicast* queues, so the multicast (CAB) queue shouldn't
		 * be included.
		 */
1462 1463
		qmask &= ~BIT(vif->cab_queue);

1464 1465
		if (iwl_mvm_is_dqa_supported(mvm))
			qmask |= BIT(IWL_MVM_DQA_AP_PROBE_RESP_QUEUE);
1466 1467 1468
	} else if (iwl_mvm_is_dqa_supported(mvm) &&
		   vif->type == NL80211_IFTYPE_P2P_DEVICE) {
		qmask |= BIT(IWL_MVM_DQA_P2P_DEVICE_QUEUE);
1469 1470
	}

1471 1472 1473 1474
	return iwl_mvm_allocate_int_sta(mvm, &mvmvif->bcast_sta, qmask,
					ieee80211_vif_type_p2p(vif));
}

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/* Allocate a new station entry for the broadcast station to the given vif,
 * and send it to the FW.
 * Note that each P2P mac should have its own broadcast station.
 *
 * @mvm: the mvm component
 * @vif: the interface to which the broadcast station is added
 * @bsta: the broadcast station to add. */
1482
int iwl_mvm_add_bcast_sta(struct iwl_mvm *mvm, struct ieee80211_vif *vif)
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{
	struct iwl_mvm_vif *mvmvif = iwl_mvm_vif_from_mac80211(vif);
1485
	struct iwl_mvm_int_sta *bsta = &mvmvif->bcast_sta;
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	int ret;

	lockdep_assert_held(&mvm->mutex);

1490
	ret = iwl_mvm_alloc_bcast_sta(mvm, vif);
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	if (ret)
		return ret;

1494
	ret = iwl_mvm_send_add_bcast_sta(mvm, vif);
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	if (ret)
		iwl_mvm_dealloc_int_sta(mvm, bsta);
1498

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	return ret;
}

1502 1503 1504 1505 1506 1507 1508
void iwl_mvm_dealloc_bcast_sta(struct iwl_mvm *mvm, struct ieee80211_vif *vif)
{
	struct iwl_mvm_vif *mvmvif = iwl_mvm_vif_from_mac80211(vif);

	iwl_mvm_dealloc_int_sta(mvm, &mvmvif->bcast_sta);
}

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/*
 * Send the FW a request to remove the station from it's internal data
 * structures, and in addition remove it from the local data structure.
 */
1513
int iwl_mvm_rm_bcast_sta(struct iwl_mvm *mvm, struct ieee80211_vif *vif)
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{
	int ret;

	lockdep_assert_held(&mvm->mutex);

1519 1520 1521
	ret = iwl_mvm_send_rm_bcast_sta(mvm, vif);

	iwl_mvm_dealloc_bcast_sta(mvm, vif);
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	return ret;
}

1526 1527
#define IWL_MAX_RX_BA_SESSIONS 16

1528
static void iwl_mvm_sync_rxq_del_ba(struct iwl_mvm *mvm, u8 baid)
1529
{
1530 1531 1532 1533
	struct iwl_mvm_delba_notif notif = {
		.metadata.type = IWL_MVM_RXQ_NOTIF_DEL_BA,
		.metadata.sync = 1,
		.delba.baid = baid,
1534
	};
1535 1536
	iwl_mvm_sync_rx_queues_internal(mvm, (void *)&notif, sizeof(notif));
};
1537

1538 1539 1540 1541 1542 1543 1544 1545 1546 1547 1548 1549
static void iwl_mvm_free_reorder(struct iwl_mvm *mvm,
				 struct iwl_mvm_baid_data *data)
{
	int i;

	iwl_mvm_sync_rxq_del_ba(mvm, data->baid);

	for (i = 0; i < mvm->trans->num_rx_queues; i++) {
		int j;
		struct iwl_mvm_reorder_buffer *reorder_buf =
			&data->reorder_buf[i];

1550 1551 1552
		spin_lock_bh(&reorder_buf->lock);
		if (likely(!reorder_buf->num_stored)) {
			spin_unlock_bh(&reorder_buf->lock);
1553
			continue;
1554
		}
1555 1556 1557 1558 1559 1560 1561 1562 1563 1564

		/*
		 * This shouldn't happen in regular DELBA since the internal
		 * delBA notification should trigger a release of all frames in
		 * the reorder buffer.
		 */
		WARN_ON(1);

		for (j = 0; j < reorder_buf->buf_size; j++)
			__skb_queue_purge(&reorder_buf->entries[j]);
1565 1566 1567 1568 1569 1570 1571 1572 1573 1574 1575
		/*
		 * Prevent timer re-arm. This prevents a very far fetched case
		 * where we timed out on the notification. There may be prior
		 * RX frames pending in the RX queue before the notification
		 * that might get processed between now and the actual deletion
		 * and we would re-arm the timer although we are deleting the
		 * reorder buffer.
		 */
		reorder_buf->removed = true;
		spin_unlock_bh(&reorder_buf->lock);
		del_timer_sync(&reorder_buf->reorder_timer);
1576 1577 1578 1579 1580 1581 1582 1583 1584 1585 1586 1587 1588 1589 1590 1591 1592 1593
	}
}

static void iwl_mvm_init_reorder_buffer(struct iwl_mvm *mvm,
					u32 sta_id,
					struct iwl_mvm_baid_data *data,
					u16 ssn, u8 buf_size)
{
	int i;

	for (i = 0; i < mvm->trans->num_rx_queues; i++) {
		struct iwl_mvm_reorder_buffer *reorder_buf =
			&data->reorder_buf[i];
		int j;

		reorder_buf->num_stored = 0;
		reorder_buf->head_sn = ssn;
		reorder_buf->buf_size = buf_size;
1594 1595 1596 1597 1598 1599 1600
		/* rx reorder timer */
		reorder_buf->reorder_timer.function =
			iwl_mvm_reorder_timer_expired;
		reorder_buf->reorder_timer.data = (unsigned long)reorder_buf;
		init_timer(&reorder_buf->reorder_timer);
		spin_lock_init(&reorder_buf->lock);
		reorder_buf->mvm = mvm;
1601 1602 1603 1604 1605
		reorder_buf->queue = i;
		reorder_buf->sta_id = sta_id;
		for (j = 0; j < reorder_buf->buf_size; j++)
			__skb_queue_head_init(&reorder_buf->entries[j]);
	}
1606 1607
}

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1608
int iwl_mvm_sta_rx_agg(struct iwl_mvm *mvm, struct ieee80211_sta *sta,
1609
		       int tid, u16 ssn, bool start, u8 buf_size, u16 timeout)
J
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1610
{
1611
	struct iwl_mvm_sta *mvm_sta = iwl_mvm_sta_from_mac80211(sta);
1612
	struct iwl_mvm_add_sta_cmd cmd = {};
1613
	struct iwl_mvm_baid_data *baid_data = NULL;
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1614 1615 1616 1617 1618
	int ret;
	u32 status;

	lockdep_assert_held(&mvm->mutex);

1619 1620 1621 1622 1623
	if (start && mvm->rx_ba_sessions >= IWL_MAX_RX_BA_SESSIONS) {
		IWL_WARN(mvm, "Not enough RX BA SESSIONS\n");
		return -ENOSPC;
	}

1624 1625 1626 1627 1628
	if (iwl_mvm_has_new_rx_api(mvm) && start) {
		/*
		 * Allocate here so if allocation fails we can bail out early
		 * before starting the BA session in the firmware
		 */
1629 1630 1631 1632
		baid_data = kzalloc(sizeof(*baid_data) +
				    mvm->trans->num_rx_queues *
				    sizeof(baid_data->reorder_buf[0]),
				    GFP_KERNEL);
1633 1634 1635 1636
		if (!baid_data)
			return -ENOMEM;
	}

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1637 1638 1639
	cmd.mac_id_n_color = cpu_to_le32(mvm_sta->mac_id_n_color);
	cmd.sta_id = mvm_sta->sta_id;
	cmd.add_modify = STA_MODE_MODIFY;
1640 1641 1642
	if (start) {
		cmd.add_immediate_ba_tid = (u8) tid;
		cmd.add_immediate_ba_ssn = cpu_to_le16(ssn);
1643
		cmd.rx_ba_window = cpu_to_le16((u16)buf_size);
1644 1645 1646
	} else {
		cmd.remove_immediate_ba_tid = (u8) tid;
	}
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1647 1648 1649 1650
	cmd.modify_mask = start ? STA_MODIFY_ADD_BA_TID :
				  STA_MODIFY_REMOVE_BA_TID;

	status = ADD_STA_SUCCESS;
1651 1652
	ret = iwl_mvm_send_cmd_pdu_status(mvm, ADD_STA,
					  iwl_mvm_add_sta_cmd_size(mvm),
1653
					  &cmd, &status);
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1654
	if (ret)
1655
		goto out_free;
J
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1656

1657
	switch (status & IWL_ADD_STA_STATUS_MASK) {
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1658 1659 1660 1661 1662 1663 1664 1665 1666 1667 1668 1669 1670 1671 1672
	case ADD_STA_SUCCESS:
		IWL_DEBUG_INFO(mvm, "RX BA Session %sed in fw\n",
			       start ? "start" : "stopp");
		break;
	case ADD_STA_IMMEDIATE_BA_FAILURE:
		IWL_WARN(mvm, "RX BA Session refused by fw\n");
		ret = -ENOSPC;
		break;
	default:
		ret = -EIO;
		IWL_ERR(mvm, "RX BA Session failed %sing, status 0x%x\n",
			start ? "start" : "stopp", status);
		break;
	}

1673 1674 1675 1676 1677 1678 1679 1680 1681 1682 1683 1684 1685 1686 1687 1688 1689 1690 1691 1692 1693 1694 1695 1696 1697 1698 1699 1700 1701 1702 1703 1704 1705 1706
	if (ret)
		goto out_free;

	if (start) {
		u8 baid;

		mvm->rx_ba_sessions++;

		if (!iwl_mvm_has_new_rx_api(mvm))
			return 0;

		if (WARN_ON(!(status & IWL_ADD_STA_BAID_VALID_MASK))) {
			ret = -EINVAL;
			goto out_free;
		}
		baid = (u8)((status & IWL_ADD_STA_BAID_MASK) >>
			    IWL_ADD_STA_BAID_SHIFT);
		baid_data->baid = baid;
		baid_data->timeout = timeout;
		baid_data->last_rx = jiffies;
		init_timer(&baid_data->session_timer);
		baid_data->session_timer.function =
			iwl_mvm_rx_agg_session_expired;
		baid_data->session_timer.data =
			(unsigned long)&mvm->baid_map[baid];
		baid_data->mvm = mvm;
		baid_data->tid = tid;
		baid_data->sta_id = mvm_sta->sta_id;

		mvm_sta->tid_to_baid[tid] = baid;
		if (timeout)
			mod_timer(&baid_data->session_timer,
				  TU_TO_EXP_TIME(timeout * 2));

1707 1708
		iwl_mvm_init_reorder_buffer(mvm, mvm_sta->sta_id,
					    baid_data, ssn, buf_size);
1709 1710 1711 1712 1713 1714 1715 1716 1717 1718 1719 1720 1721 1722 1723 1724 1725 1726 1727 1728 1729 1730 1731 1732
		/*
		 * protect the BA data with RCU to cover a case where our
		 * internal RX sync mechanism will timeout (not that it's
		 * supposed to happen) and we will free the session data while
		 * RX is being processed in parallel
		 */
		WARN_ON(rcu_access_pointer(mvm->baid_map[baid]));
		rcu_assign_pointer(mvm->baid_map[baid], baid_data);
	} else if (mvm->rx_ba_sessions > 0) {
		u8 baid = mvm_sta->tid_to_baid[tid];

		/* check that restart flow didn't zero the counter */
		mvm->rx_ba_sessions--;
		if (!iwl_mvm_has_new_rx_api(mvm))
			return 0;

		if (WARN_ON(baid == IWL_RX_REORDER_DATA_INVALID_BAID))
			return -EINVAL;

		baid_data = rcu_access_pointer(mvm->baid_map[baid]);
		if (WARN_ON(!baid_data))
			return -EINVAL;

		/* synchronize all rx queues so we can safely delete */
1733
		iwl_mvm_free_reorder(mvm, baid_data);
1734 1735 1736
		del_timer_sync(&baid_data->session_timer);
		RCU_INIT_POINTER(mvm->baid_map[baid], NULL);
		kfree_rcu(baid_data, rcu_head);
1737
	}
1738
	return 0;
1739

1740 1741
out_free:
	kfree(baid_data);
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1742 1743 1744
	return ret;
}

1745 1746
int iwl_mvm_sta_tx_agg(struct iwl_mvm *mvm, struct ieee80211_sta *sta,
		       int tid, u8 queue, bool start)
J
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1747
{
1748
	struct iwl_mvm_sta *mvm_sta = iwl_mvm_sta_from_mac80211(sta);
1749
	struct iwl_mvm_add_sta_cmd cmd = {};
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1750 1751 1752 1753 1754 1755 1756 1757 1758
	int ret;
	u32 status;

	lockdep_assert_held(&mvm->mutex);

	if (start) {
		mvm_sta->tfd_queue_msk |= BIT(queue);
		mvm_sta->tid_disable_agg &= ~BIT(tid);
	} else {
1759 1760 1761
		/* In DQA-mode the queue isn't removed on agg termination */
		if (!iwl_mvm_is_dqa_supported(mvm))
			mvm_sta->tfd_queue_msk &= ~BIT(queue);
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1762 1763 1764 1765 1766 1767 1768 1769 1770 1771 1772
		mvm_sta->tid_disable_agg |= BIT(tid);
	}

	cmd.mac_id_n_color = cpu_to_le32(mvm_sta->mac_id_n_color);
	cmd.sta_id = mvm_sta->sta_id;
	cmd.add_modify = STA_MODE_MODIFY;
	cmd.modify_mask = STA_MODIFY_QUEUES | STA_MODIFY_TID_DISABLE_TX;
	cmd.tfd_queue_msk = cpu_to_le32(mvm_sta->tfd_queue_msk);
	cmd.tid_disable_tx = cpu_to_le16(mvm_sta->tid_disable_agg);

	status = ADD_STA_SUCCESS;
1773 1774
	ret = iwl_mvm_send_cmd_pdu_status(mvm, ADD_STA,
					  iwl_mvm_add_sta_cmd_size(mvm),
1775
					  &cmd, &status);
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1776 1777 1778
	if (ret)
		return ret;

1779
	switch (status & IWL_ADD_STA_STATUS_MASK) {
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1780 1781 1782 1783 1784 1785 1786 1787 1788 1789 1790 1791
	case ADD_STA_SUCCESS:
		break;
	default:
		ret = -EIO;
		IWL_ERR(mvm, "TX BA Session failed %sing, status 0x%x\n",
			start ? "start" : "stopp", status);
		break;
	}

	return ret;
}

1792
const u8 tid_to_mac80211_ac[] = {
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1793 1794 1795 1796 1797 1798 1799 1800
	IEEE80211_AC_BE,
	IEEE80211_AC_BK,
	IEEE80211_AC_BK,
	IEEE80211_AC_BE,
	IEEE80211_AC_VI,
	IEEE80211_AC_VI,
	IEEE80211_AC_VO,
	IEEE80211_AC_VO,
1801
	IEEE80211_AC_VO, /* We treat MGMT as TID 8, which is set as AC_VO */
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1802 1803
};

1804 1805 1806 1807 1808 1809 1810 1811 1812 1813 1814
static const u8 tid_to_ucode_ac[] = {
	AC_BE,
	AC_BK,
	AC_BK,
	AC_BE,
	AC_VI,
	AC_VI,
	AC_VO,
	AC_VO,
};

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int iwl_mvm_sta_tx_agg_start(struct iwl_mvm *mvm, struct ieee80211_vif *vif,
			     struct ieee80211_sta *sta, u16 tid, u16 *ssn)
{
1818
	struct iwl_mvm_sta *mvmsta = iwl_mvm_sta_from_mac80211(sta);
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1819 1820
	struct iwl_mvm_tid_data *tid_data;
	int txq_id;
1821
	int ret;
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1822 1823 1824 1825 1826 1827 1828 1829 1830 1831 1832 1833

	if (WARN_ON_ONCE(tid >= IWL_MAX_TID_COUNT))
		return -EINVAL;

	if (mvmsta->tid_data[tid].state != IWL_AGG_OFF) {
		IWL_ERR(mvm, "Start AGG when state is not IWL_AGG_OFF %d!\n",
			mvmsta->tid_data[tid].state);
		return -ENXIO;
	}

	lockdep_assert_held(&mvm->mutex);

1834 1835 1836 1837 1838 1839 1840 1841 1842
	spin_lock_bh(&mvmsta->lock);

	/* possible race condition - we entered D0i3 while starting agg */
	if (test_bit(IWL_MVM_STATUS_IN_D0I3, &mvm->status)) {
		spin_unlock_bh(&mvmsta->lock);
		IWL_ERR(mvm, "Entered D0i3 while starting Tx agg\n");
		return -EIO;
	}

1843 1844
	spin_lock_bh(&mvm->queue_info_lock);

1845 1846 1847 1848 1849 1850 1851 1852 1853 1854 1855
	/*
	 * Note the possible cases:
	 *  1. In DQA mode with an enabled TXQ - TXQ needs to become agg'ed
	 *  2. Non-DQA mode: the TXQ hasn't yet been enabled, so find a free
	 *	one and mark it as reserved
	 *  3. In DQA mode, but no traffic yet on this TID: same treatment as in
	 *	non-DQA mode, since the TXQ hasn't yet been allocated
	 */
	txq_id = mvmsta->tid_data[tid].txq_id;
	if (!iwl_mvm_is_dqa_supported(mvm) ||
	    mvm->queue_info[txq_id].status != IWL_MVM_QUEUE_READY) {
1856 1857
		txq_id = iwl_mvm_find_free_queue(mvm, mvmsta->sta_id,
						 mvm->first_agg_queue,
1858 1859 1860 1861 1862 1863 1864 1865 1866 1867
						 mvm->last_agg_queue);
		if (txq_id < 0) {
			ret = txq_id;
			spin_unlock_bh(&mvm->queue_info_lock);
			IWL_ERR(mvm, "Failed to allocate agg queue\n");
			goto release_locks;
		}

		/* TXQ hasn't yet been enabled, so mark it only as reserved */
		mvm->queue_info[txq_id].status = IWL_MVM_QUEUE_RESERVED;
1868 1869
	}
	spin_unlock_bh(&mvm->queue_info_lock);
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1870

1871 1872 1873 1874
	IWL_DEBUG_TX_QUEUES(mvm,
			    "AGG for tid %d will be on queue #%d\n",
			    tid, txq_id);

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1875
	tid_data = &mvmsta->tid_data[tid];
1876
	tid_data->ssn = IEEE80211_SEQ_TO_SN(tid_data->seq_number);
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1877 1878 1879 1880 1881 1882 1883 1884 1885 1886 1887 1888 1889 1890 1891
	tid_data->txq_id = txq_id;
	*ssn = tid_data->ssn;

	IWL_DEBUG_TX_QUEUES(mvm,
			    "Start AGG: sta %d tid %d queue %d - ssn = %d, next_recl = %d\n",
			    mvmsta->sta_id, tid, txq_id, tid_data->ssn,
			    tid_data->next_reclaimed);

	if (tid_data->ssn == tid_data->next_reclaimed) {
		tid_data->state = IWL_AGG_STARTING;
		ieee80211_start_tx_ba_cb_irqsafe(vif, sta->addr, tid);
	} else {
		tid_data->state = IWL_EMPTYING_HW_QUEUE_ADDBA;
	}

1892 1893 1894
	ret = 0;

release_locks:
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1895 1896
	spin_unlock_bh(&mvmsta->lock);

1897
	return ret;
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1898 1899 1900
}

int iwl_mvm_sta_tx_agg_oper(struct iwl_mvm *mvm, struct ieee80211_vif *vif,
1901 1902
			    struct ieee80211_sta *sta, u16 tid, u8 buf_size,
			    bool amsdu)
J
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1903
{
1904
	struct iwl_mvm_sta *mvmsta = iwl_mvm_sta_from_mac80211(sta);
J
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1905
	struct iwl_mvm_tid_data *tid_data = &mvmsta->tid_data[tid];
1906 1907
	unsigned int wdg_timeout =
		iwl_mvm_get_wd_timeout(mvm, vif, sta->tdls, false);
1908
	int queue, ret;
1909
	bool alloc_queue = true;
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1910 1911
	u16 ssn;

1912 1913 1914 1915 1916 1917 1918
	struct iwl_trans_txq_scd_cfg cfg = {
		.sta_id = mvmsta->sta_id,
		.tid = tid,
		.frame_limit = buf_size,
		.aggregate = true,
	};

1919 1920 1921
	BUILD_BUG_ON((sizeof(mvmsta->agg_tids) * BITS_PER_BYTE)
		     != IWL_MAX_TID_COUNT);

J
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1922 1923 1924 1925 1926 1927
	buf_size = min_t(int, buf_size, LINK_QUAL_AGG_FRAME_LIMIT_DEF);

	spin_lock_bh(&mvmsta->lock);
	ssn = tid_data->ssn;
	queue = tid_data->txq_id;
	tid_data->state = IWL_AGG_ON;
1928
	mvmsta->agg_tids |= BIT(tid);
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1929
	tid_data->ssn = 0xffff;
1930
	tid_data->amsdu_in_ampdu_allowed = amsdu;
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1931 1932
	spin_unlock_bh(&mvmsta->lock);

1933
	cfg.fifo = iwl_mvm_ac_to_tx_fifo[tid_to_mac80211_ac[tid]];
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1934

1935 1936 1937 1938 1939 1940 1941 1942 1943 1944 1945 1946 1947 1948 1949 1950 1951 1952 1953 1954 1955 1956 1957 1958 1959 1960 1961 1962 1963 1964 1965 1966 1967 1968 1969 1970 1971 1972 1973 1974
	/* In DQA mode, the existing queue might need to be reconfigured */
	if (iwl_mvm_is_dqa_supported(mvm)) {
		spin_lock_bh(&mvm->queue_info_lock);
		/* Maybe there is no need to even alloc a queue... */
		if (mvm->queue_info[queue].status == IWL_MVM_QUEUE_READY)
			alloc_queue = false;
		spin_unlock_bh(&mvm->queue_info_lock);

		/*
		 * Only reconfig the SCD for the queue if the window size has
		 * changed from current (become smaller)
		 */
		if (!alloc_queue && buf_size < mvmsta->max_agg_bufsize) {
			/*
			 * If reconfiguring an existing queue, it first must be
			 * drained
			 */
			ret = iwl_trans_wait_tx_queue_empty(mvm->trans,
							    BIT(queue));
			if (ret) {
				IWL_ERR(mvm,
					"Error draining queue before reconfig\n");
				return ret;
			}

			ret = iwl_mvm_reconfig_scd(mvm, queue, cfg.fifo,
						   mvmsta->sta_id, tid,
						   buf_size, ssn);
			if (ret) {
				IWL_ERR(mvm,
					"Error reconfiguring TXQ #%d\n", queue);
				return ret;
			}
		}
	}

	if (alloc_queue)
		iwl_mvm_enable_txq(mvm, queue,
				   vif->hw_queue[tid_to_mac80211_ac[tid]], ssn,
				   &cfg, wdg_timeout);
1975

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1976 1977 1978 1979
	ret = iwl_mvm_sta_tx_agg(mvm, sta, tid, queue, true);
	if (ret)
		return -EIO;

1980 1981
	/* No need to mark as reserved */
	spin_lock_bh(&mvm->queue_info_lock);
1982
	mvm->queue_info[queue].status = IWL_MVM_QUEUE_READY;
1983 1984
	spin_unlock_bh(&mvm->queue_info_lock);

J
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1985 1986 1987 1988 1989 1990 1991 1992 1993 1994 1995
	/*
	 * Even though in theory the peer could have different
	 * aggregation reorder buffer sizes for different sessions,
	 * our ucode doesn't allow for that and has a global limit
	 * for each station. Therefore, use the minimum of all the
	 * aggregation sessions and our default value.
	 */
	mvmsta->max_agg_bufsize =
		min(mvmsta->max_agg_bufsize, buf_size);
	mvmsta->lq_sta.lq.agg_frame_cnt_limit = mvmsta->max_agg_bufsize;

1996 1997 1998
	IWL_DEBUG_HT(mvm, "Tx aggregation enabled on ra = %pM tid = %d\n",
		     sta->addr, tid);

1999
	return iwl_mvm_send_lq_cmd(mvm, &mvmsta->lq_sta.lq, false);
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2000 2001 2002 2003 2004
}

int iwl_mvm_sta_tx_agg_stop(struct iwl_mvm *mvm, struct ieee80211_vif *vif,
			    struct ieee80211_sta *sta, u16 tid)
{
2005
	struct iwl_mvm_sta *mvmsta = iwl_mvm_sta_from_mac80211(sta);
J
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2006 2007 2008 2009
	struct iwl_mvm_tid_data *tid_data = &mvmsta->tid_data[tid];
	u16 txq_id;
	int err;

2010 2011 2012 2013 2014 2015 2016 2017 2018 2019

	/*
	 * If mac80211 is cleaning its state, then say that we finished since
	 * our state has been cleared anyway.
	 */
	if (test_bit(IWL_MVM_STATUS_IN_HW_RESTART, &mvm->status)) {
		ieee80211_stop_tx_ba_cb_irqsafe(vif, sta->addr, tid);
		return 0;
	}

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2020 2021 2022 2023 2024 2025 2026
	spin_lock_bh(&mvmsta->lock);

	txq_id = tid_data->txq_id;

	IWL_DEBUG_TX_QUEUES(mvm, "Stop AGG: sta %d tid %d q %d state %d\n",
			    mvmsta->sta_id, tid, txq_id, tid_data->state);

2027 2028
	mvmsta->agg_tids &= ~BIT(tid);

2029
	spin_lock_bh(&mvm->queue_info_lock);
2030 2031 2032 2033 2034 2035 2036 2037 2038
	/*
	 * The TXQ is marked as reserved only if no traffic came through yet
	 * This means no traffic has been sent on this TID (agg'd or not), so
	 * we no longer have use for the queue. Since it hasn't even been
	 * allocated through iwl_mvm_enable_txq, so we can just mark it back as
	 * free.
	 */
	if (mvm->queue_info[txq_id].status == IWL_MVM_QUEUE_RESERVED)
		mvm->queue_info[txq_id].status = IWL_MVM_QUEUE_FREE;
2039 2040
	spin_unlock_bh(&mvm->queue_info_lock);

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2041 2042
	switch (tid_data->state) {
	case IWL_AGG_ON:
2043
		tid_data->ssn = IEEE80211_SEQ_TO_SN(tid_data->seq_number);
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2044 2045 2046 2047 2048 2049 2050 2051 2052 2053 2054 2055 2056

		IWL_DEBUG_TX_QUEUES(mvm,
				    "ssn = %d, next_recl = %d\n",
				    tid_data->ssn, tid_data->next_reclaimed);

		/* There are still packets for this RA / TID in the HW */
		if (tid_data->ssn != tid_data->next_reclaimed) {
			tid_data->state = IWL_EMPTYING_HW_QUEUE_DELBA;
			err = 0;
			break;
		}

		tid_data->ssn = 0xffff;
2057 2058 2059 2060 2061 2062 2063
		tid_data->state = IWL_AGG_OFF;
		spin_unlock_bh(&mvmsta->lock);

		ieee80211_stop_tx_ba_cb_irqsafe(vif, sta->addr, tid);

		iwl_mvm_sta_tx_agg(mvm, sta, tid, txq_id, false);

2064 2065 2066 2067 2068
		if (!iwl_mvm_is_dqa_supported(mvm)) {
			int mac_queue = vif->hw_queue[tid_to_mac80211_ac[tid]];

			iwl_mvm_disable_txq(mvm, txq_id, mac_queue, tid, 0);
		}
2069
		return 0;
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2070 2071 2072 2073 2074 2075 2076 2077 2078 2079 2080 2081 2082 2083 2084 2085 2086 2087 2088 2089 2090 2091 2092 2093 2094 2095 2096 2097
	case IWL_AGG_STARTING:
	case IWL_EMPTYING_HW_QUEUE_ADDBA:
		/*
		 * The agg session has been stopped before it was set up. This
		 * can happen when the AddBA timer times out for example.
		 */

		/* No barriers since we are under mutex */
		lockdep_assert_held(&mvm->mutex);

		ieee80211_stop_tx_ba_cb_irqsafe(vif, sta->addr, tid);
		tid_data->state = IWL_AGG_OFF;
		err = 0;
		break;
	default:
		IWL_ERR(mvm,
			"Stopping AGG while state not ON or starting for %d on %d (%d)\n",
			mvmsta->sta_id, tid, tid_data->state);
		IWL_ERR(mvm,
			"\ttid_data->txq_id = %d\n", tid_data->txq_id);
		err = -EINVAL;
	}

	spin_unlock_bh(&mvmsta->lock);

	return err;
}

2098 2099 2100
int iwl_mvm_sta_tx_agg_flush(struct iwl_mvm *mvm, struct ieee80211_vif *vif,
			    struct ieee80211_sta *sta, u16 tid)
{
2101
	struct iwl_mvm_sta *mvmsta = iwl_mvm_sta_from_mac80211(sta);
2102 2103
	struct iwl_mvm_tid_data *tid_data = &mvmsta->tid_data[tid];
	u16 txq_id;
2104
	enum iwl_mvm_agg_state old_state;
2105 2106 2107 2108 2109 2110 2111 2112 2113

	/*
	 * First set the agg state to OFF to avoid calling
	 * ieee80211_stop_tx_ba_cb in iwl_mvm_check_ratid_empty.
	 */
	spin_lock_bh(&mvmsta->lock);
	txq_id = tid_data->txq_id;
	IWL_DEBUG_TX_QUEUES(mvm, "Flush AGG: sta %d tid %d q %d state %d\n",
			    mvmsta->sta_id, tid, txq_id, tid_data->state);
2114
	old_state = tid_data->state;
2115
	tid_data->state = IWL_AGG_OFF;
2116
	mvmsta->agg_tids &= ~BIT(tid);
2117 2118
	spin_unlock_bh(&mvmsta->lock);

2119
	spin_lock_bh(&mvm->queue_info_lock);
2120 2121 2122 2123 2124 2125 2126 2127 2128
	/*
	 * The TXQ is marked as reserved only if no traffic came through yet
	 * This means no traffic has been sent on this TID (agg'd or not), so
	 * we no longer have use for the queue. Since it hasn't even been
	 * allocated through iwl_mvm_enable_txq, so we can just mark it back as
	 * free.
	 */
	if (mvm->queue_info[txq_id].status == IWL_MVM_QUEUE_RESERVED)
		mvm->queue_info[txq_id].status = IWL_MVM_QUEUE_FREE;
2129 2130
	spin_unlock_bh(&mvm->queue_info_lock);

2131
	if (old_state >= IWL_AGG_ON) {
2132
		iwl_mvm_drain_sta(mvm, mvmsta, true);
2133
		if (iwl_mvm_flush_tx_path(mvm, BIT(txq_id), 0))
2134
			IWL_ERR(mvm, "Couldn't flush the AGG queue\n");
2135 2136 2137
		iwl_trans_wait_tx_queue_empty(mvm->trans,
					      mvmsta->tfd_queue_msk);
		iwl_mvm_drain_sta(mvm, mvmsta, false);
2138

2139 2140
		iwl_mvm_sta_tx_agg(mvm, sta, tid, txq_id, false);

2141 2142 2143 2144 2145 2146
		if (!iwl_mvm_is_dqa_supported(mvm)) {
			int mac_queue = vif->hw_queue[tid_to_mac80211_ac[tid]];

			iwl_mvm_disable_txq(mvm, tid_data->txq_id, mac_queue,
					    tid, 0);
		}
2147
	}
2148 2149 2150 2151

	return 0;
}

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2152 2153
static int iwl_mvm_set_fw_key_idx(struct iwl_mvm *mvm)
{
2154
	int i, max = -1, max_offs = -1;
J
Johannes Berg 已提交
2155 2156 2157

	lockdep_assert_held(&mvm->mutex);

2158 2159 2160 2161 2162 2163 2164 2165 2166 2167 2168 2169 2170 2171
	/* Pick the unused key offset with the highest 'deleted'
	 * counter. Every time a key is deleted, all the counters
	 * are incremented and the one that was just deleted is
	 * reset to zero. Thus, the highest counter is the one
	 * that was deleted longest ago. Pick that one.
	 */
	for (i = 0; i < STA_KEY_MAX_NUM; i++) {
		if (test_bit(i, mvm->fw_key_table))
			continue;
		if (mvm->fw_key_deleted[i] > max) {
			max = mvm->fw_key_deleted[i];
			max_offs = i;
		}
	}
J
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2172

2173
	if (max_offs < 0)
J
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2174 2175
		return STA_KEY_IDX_INVALID;

2176
	return max_offs;
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2177 2178
}

2179 2180 2181
static struct iwl_mvm_sta *iwl_mvm_get_key_sta(struct iwl_mvm *mvm,
					       struct ieee80211_vif *vif,
					       struct ieee80211_sta *sta)
J
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2182
{
2183
	struct iwl_mvm_vif *mvmvif = iwl_mvm_vif_from_mac80211(vif);
J
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2184

2185 2186
	if (sta)
		return iwl_mvm_sta_from_mac80211(sta);
J
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2187 2188 2189 2190 2191 2192 2193

	/*
	 * The device expects GTKs for station interfaces to be
	 * installed as GTKs for the AP station. If we have no
	 * station ID, then use AP's station ID.
	 */
	if (vif->type == NL80211_IFTYPE_STATION &&
2194 2195 2196 2197 2198 2199 2200 2201
	    mvmvif->ap_sta_id != IWL_MVM_STATION_COUNT) {
		u8 sta_id = mvmvif->ap_sta_id;

		/*
		 * It is possible that the 'sta' parameter is NULL,
		 * for example when a GTK is removed - the sta_id will then
		 * be the AP ID, and no station was passed by mac80211.
		 */
2202
		return iwl_mvm_sta_from_staid_protected(mvm, sta_id);
2203
	}
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2204

2205
	return NULL;
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2206 2207 2208 2209
}

static int iwl_mvm_send_sta_key(struct iwl_mvm *mvm,
				struct iwl_mvm_sta *mvm_sta,
2210
				struct ieee80211_key_conf *keyconf, bool mcast,
2211 2212
				u32 tkip_iv32, u16 *tkip_p1k, u32 cmd_flags,
				u8 key_offset)
J
Johannes Berg 已提交
2213
{
2214
	struct iwl_mvm_add_sta_key_cmd cmd = {};
2215
	__le16 key_flags;
2216 2217
	int ret;
	u32 status;
J
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2218 2219
	u16 keyidx;
	int i;
2220
	u8 sta_id = mvm_sta->sta_id;
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2221 2222 2223 2224 2225 2226 2227 2228 2229

	keyidx = (keyconf->keyidx << STA_KEY_FLG_KEYID_POS) &
		 STA_KEY_FLG_KEYID_MSK;
	key_flags = cpu_to_le16(keyidx);
	key_flags |= cpu_to_le16(STA_KEY_FLG_WEP_KEY_MAP);

	switch (keyconf->cipher) {
	case WLAN_CIPHER_SUITE_TKIP:
		key_flags |= cpu_to_le16(STA_KEY_FLG_TKIP);
2230
		cmd.tkip_rx_tsc_byte2 = tkip_iv32;
J
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2231
		for (i = 0; i < 5; i++)
2232 2233
			cmd.tkip_rx_ttak[i] = cpu_to_le16(tkip_p1k[i]);
		memcpy(cmd.key, keyconf->key, keyconf->keylen);
J
Johannes Berg 已提交
2234 2235 2236
		break;
	case WLAN_CIPHER_SUITE_CCMP:
		key_flags |= cpu_to_le16(STA_KEY_FLG_CCM);
2237
		memcpy(cmd.key, keyconf->key, keyconf->keylen);
J
Johannes Berg 已提交
2238
		break;
2239 2240
	case WLAN_CIPHER_SUITE_WEP104:
		key_flags |= cpu_to_le16(STA_KEY_FLG_WEP_13BYTES);
2241
		/* fall through */
2242 2243 2244 2245
	case WLAN_CIPHER_SUITE_WEP40:
		key_flags |= cpu_to_le16(STA_KEY_FLG_WEP);
		memcpy(cmd.key + 3, keyconf->key, keyconf->keylen);
		break;
J
Johannes Berg 已提交
2246
	default:
2247 2248
		key_flags |= cpu_to_le16(STA_KEY_FLG_EXT);
		memcpy(cmd.key, keyconf->key, keyconf->keylen);
J
Johannes Berg 已提交
2249 2250
	}

2251
	if (mcast)
J
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2252 2253
		key_flags |= cpu_to_le16(STA_KEY_MULTICAST);

2254
	cmd.key_offset = key_offset;
2255
	cmd.key_flags = key_flags;
J
Johannes Berg 已提交
2256 2257 2258
	cmd.sta_id = sta_id;

	status = ADD_STA_SUCCESS;
E
Emmanuel Grumbach 已提交
2259
	if (cmd_flags & CMD_ASYNC)
2260 2261
		ret =  iwl_mvm_send_cmd_pdu(mvm, ADD_STA_KEY, CMD_ASYNC,
					    sizeof(cmd), &cmd);
E
Emmanuel Grumbach 已提交
2262 2263 2264
	else
		ret = iwl_mvm_send_cmd_pdu_status(mvm, ADD_STA_KEY, sizeof(cmd),
						  &cmd, &status);
J
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2265 2266 2267 2268 2269 2270 2271 2272 2273 2274 2275 2276 2277 2278 2279 2280 2281 2282 2283 2284 2285 2286 2287 2288 2289 2290 2291 2292 2293 2294 2295 2296 2297 2298 2299 2300 2301 2302 2303 2304 2305 2306 2307 2308 2309 2310 2311 2312 2313 2314

	switch (status) {
	case ADD_STA_SUCCESS:
		IWL_DEBUG_WEP(mvm, "MODIFY_STA: set dynamic key passed\n");
		break;
	default:
		ret = -EIO;
		IWL_ERR(mvm, "MODIFY_STA: set dynamic key failed\n");
		break;
	}

	return ret;
}

static int iwl_mvm_send_sta_igtk(struct iwl_mvm *mvm,
				 struct ieee80211_key_conf *keyconf,
				 u8 sta_id, bool remove_key)
{
	struct iwl_mvm_mgmt_mcast_key_cmd igtk_cmd = {};

	/* verify the key details match the required command's expectations */
	if (WARN_ON((keyconf->cipher != WLAN_CIPHER_SUITE_AES_CMAC) ||
		    (keyconf->flags & IEEE80211_KEY_FLAG_PAIRWISE) ||
		    (keyconf->keyidx != 4 && keyconf->keyidx != 5)))
		return -EINVAL;

	igtk_cmd.key_id = cpu_to_le32(keyconf->keyidx);
	igtk_cmd.sta_id = cpu_to_le32(sta_id);

	if (remove_key) {
		igtk_cmd.ctrl_flags |= cpu_to_le32(STA_KEY_NOT_VALID);
	} else {
		struct ieee80211_key_seq seq;
		const u8 *pn;

		memcpy(igtk_cmd.IGTK, keyconf->key, keyconf->keylen);
		ieee80211_get_key_rx_seq(keyconf, 0, &seq);
		pn = seq.aes_cmac.pn;
		igtk_cmd.receive_seq_cnt = cpu_to_le64(((u64) pn[5] << 0) |
						       ((u64) pn[4] << 8) |
						       ((u64) pn[3] << 16) |
						       ((u64) pn[2] << 24) |
						       ((u64) pn[1] << 32) |
						       ((u64) pn[0] << 40));
	}

	IWL_DEBUG_INFO(mvm, "%s igtk for sta %u\n",
		       remove_key ? "removing" : "installing",
		       igtk_cmd.sta_id);

E
Emmanuel Grumbach 已提交
2315
	return iwl_mvm_send_cmd_pdu(mvm, MGMT_MCAST_KEY, 0,
J
Johannes Berg 已提交
2316 2317 2318 2319 2320 2321 2322 2323
				    sizeof(igtk_cmd), &igtk_cmd);
}


static inline u8 *iwl_mvm_get_mac_addr(struct iwl_mvm *mvm,
				       struct ieee80211_vif *vif,
				       struct ieee80211_sta *sta)
{
2324
	struct iwl_mvm_vif *mvmvif = iwl_mvm_vif_from_mac80211(vif);
J
Johannes Berg 已提交
2325 2326 2327 2328 2329 2330 2331 2332 2333 2334 2335 2336 2337 2338 2339 2340

	if (sta)
		return sta->addr;

	if (vif->type == NL80211_IFTYPE_STATION &&
	    mvmvif->ap_sta_id != IWL_MVM_STATION_COUNT) {
		u8 sta_id = mvmvif->ap_sta_id;
		sta = rcu_dereference_protected(mvm->fw_id_to_mac_id[sta_id],
						lockdep_is_held(&mvm->mutex));
		return sta->addr;
	}


	return NULL;
}

2341 2342 2343
static int __iwl_mvm_set_sta_key(struct iwl_mvm *mvm,
				 struct ieee80211_vif *vif,
				 struct ieee80211_sta *sta,
2344
				 struct ieee80211_key_conf *keyconf,
2345
				 u8 key_offset,
2346
				 bool mcast)
2347 2348 2349 2350 2351 2352 2353 2354 2355 2356 2357 2358 2359
{
	struct iwl_mvm_sta *mvm_sta = iwl_mvm_sta_from_mac80211(sta);
	int ret;
	const u8 *addr;
	struct ieee80211_key_seq seq;
	u16 p1k[5];

	switch (keyconf->cipher) {
	case WLAN_CIPHER_SUITE_TKIP:
		addr = iwl_mvm_get_mac_addr(mvm, vif, sta);
		/* get phase 1 key from mac80211 */
		ieee80211_get_key_rx_seq(keyconf, 0, &seq);
		ieee80211_get_tkip_rx_p1k(keyconf, addr, seq.tkip.iv32, p1k);
2360
		ret = iwl_mvm_send_sta_key(mvm, mvm_sta, keyconf, mcast,
2361
					   seq.tkip.iv32, p1k, 0, key_offset);
2362 2363
		break;
	case WLAN_CIPHER_SUITE_CCMP:
2364 2365 2366
	case WLAN_CIPHER_SUITE_WEP40:
	case WLAN_CIPHER_SUITE_WEP104:
		ret = iwl_mvm_send_sta_key(mvm, mvm_sta, keyconf, mcast,
2367
					   0, NULL, 0, key_offset);
2368 2369
		break;
	default:
2370
		ret = iwl_mvm_send_sta_key(mvm, mvm_sta, keyconf, mcast,
2371
					   0, NULL, 0, key_offset);
2372 2373 2374 2375 2376 2377
	}

	return ret;
}

static int __iwl_mvm_remove_sta_key(struct iwl_mvm *mvm, u8 sta_id,
2378 2379
				    struct ieee80211_key_conf *keyconf,
				    bool mcast)
2380 2381 2382 2383 2384 2385 2386 2387 2388 2389 2390
{
	struct iwl_mvm_add_sta_key_cmd cmd = {};
	__le16 key_flags;
	int ret;
	u32 status;

	key_flags = cpu_to_le16((keyconf->keyidx << STA_KEY_FLG_KEYID_POS) &
				 STA_KEY_FLG_KEYID_MSK);
	key_flags |= cpu_to_le16(STA_KEY_FLG_NO_ENC | STA_KEY_FLG_WEP_KEY_MAP);
	key_flags |= cpu_to_le16(STA_KEY_NOT_VALID);

2391
	if (mcast)
2392 2393 2394 2395 2396 2397 2398 2399 2400 2401 2402 2403 2404 2405 2406 2407 2408 2409 2410 2411 2412 2413 2414
		key_flags |= cpu_to_le16(STA_KEY_MULTICAST);

	cmd.key_flags = key_flags;
	cmd.key_offset = keyconf->hw_key_idx;
	cmd.sta_id = sta_id;

	status = ADD_STA_SUCCESS;
	ret = iwl_mvm_send_cmd_pdu_status(mvm, ADD_STA_KEY, sizeof(cmd),
					  &cmd, &status);

	switch (status) {
	case ADD_STA_SUCCESS:
		IWL_DEBUG_WEP(mvm, "MODIFY_STA: remove sta key passed\n");
		break;
	default:
		ret = -EIO;
		IWL_ERR(mvm, "MODIFY_STA: remove sta key failed\n");
		break;
	}

	return ret;
}

J
Johannes Berg 已提交
2415 2416 2417 2418
int iwl_mvm_set_sta_key(struct iwl_mvm *mvm,
			struct ieee80211_vif *vif,
			struct ieee80211_sta *sta,
			struct ieee80211_key_conf *keyconf,
2419
			u8 key_offset)
J
Johannes Berg 已提交
2420
{
2421
	bool mcast = !(keyconf->flags & IEEE80211_KEY_FLAG_PAIRWISE);
2422
	struct iwl_mvm_sta *mvm_sta;
2423
	u8 sta_id;
J
Johannes Berg 已提交
2424
	int ret;
2425
	static const u8 __maybe_unused zero_addr[ETH_ALEN] = {0};
J
Johannes Berg 已提交
2426 2427 2428 2429

	lockdep_assert_held(&mvm->mutex);

	/* Get the station id from the mvm local station table */
2430 2431 2432
	mvm_sta = iwl_mvm_get_key_sta(mvm, vif, sta);
	if (!mvm_sta) {
		IWL_ERR(mvm, "Failed to find station\n");
J
Johannes Berg 已提交
2433 2434
		return -EINVAL;
	}
2435
	sta_id = mvm_sta->sta_id;
J
Johannes Berg 已提交
2436 2437 2438 2439 2440 2441 2442 2443 2444 2445 2446 2447 2448 2449 2450 2451 2452 2453 2454

	if (keyconf->cipher == WLAN_CIPHER_SUITE_AES_CMAC) {
		ret = iwl_mvm_send_sta_igtk(mvm, keyconf, sta_id, false);
		goto end;
	}

	/*
	 * It is possible that the 'sta' parameter is NULL, and thus
	 * there is a need to retrieve  the sta from the local station table.
	 */
	if (!sta) {
		sta = rcu_dereference_protected(mvm->fw_id_to_mac_id[sta_id],
						lockdep_is_held(&mvm->mutex));
		if (IS_ERR_OR_NULL(sta)) {
			IWL_ERR(mvm, "Invalid station id\n");
			return -EINVAL;
		}
	}

2455
	if (WARN_ON_ONCE(iwl_mvm_sta_from_mac80211(sta)->vif != vif))
J
Johannes Berg 已提交
2456 2457
		return -EINVAL;

2458 2459 2460 2461 2462 2463 2464 2465 2466 2467 2468 2469 2470 2471
	/* If the key_offset is not pre-assigned, we need to find a
	 * new offset to use.  In normal cases, the offset is not
	 * pre-assigned, but during HW_RESTART we want to reuse the
	 * same indices, so we pass them when this function is called.
	 *
	 * In D3 entry, we need to hardcoded the indices (because the
	 * firmware hardcodes the PTK offset to 0).  In this case, we
	 * need to make sure we don't overwrite the hw_key_idx in the
	 * keyconf structure, because otherwise we cannot configure
	 * the original ones back when resuming.
	 */
	if (key_offset == STA_KEY_IDX_INVALID) {
		key_offset  = iwl_mvm_set_fw_key_idx(mvm);
		if (key_offset == STA_KEY_IDX_INVALID)
J
Johannes Berg 已提交
2472
			return -ENOSPC;
2473
		keyconf->hw_key_idx = key_offset;
J
Johannes Berg 已提交
2474 2475
	}

2476
	ret = __iwl_mvm_set_sta_key(mvm, vif, sta, keyconf, key_offset, mcast);
2477
	if (ret)
2478 2479 2480 2481 2482 2483 2484 2485 2486 2487
		goto end;

	/*
	 * For WEP, the same key is used for multicast and unicast. Upload it
	 * again, using the same key offset, and now pointing the other one
	 * to the same key slot (offset).
	 * If this fails, remove the original as well.
	 */
	if (keyconf->cipher == WLAN_CIPHER_SUITE_WEP40 ||
	    keyconf->cipher == WLAN_CIPHER_SUITE_WEP104) {
2488 2489
		ret = __iwl_mvm_set_sta_key(mvm, vif, sta, keyconf,
					    key_offset, !mcast);
2490 2491
		if (ret) {
			__iwl_mvm_remove_sta_key(mvm, sta_id, keyconf, mcast);
2492
			goto end;
2493 2494
		}
	}
J
Johannes Berg 已提交
2495

2496 2497
	__set_bit(key_offset, mvm->fw_key_table);

J
Johannes Berg 已提交
2498 2499 2500
end:
	IWL_DEBUG_WEP(mvm, "key: cipher=%x len=%d idx=%d sta=%pM ret=%d\n",
		      keyconf->cipher, keyconf->keylen, keyconf->keyidx,
2501
		      sta ? sta->addr : zero_addr, ret);
J
Johannes Berg 已提交
2502 2503 2504 2505 2506 2507 2508 2509
	return ret;
}

int iwl_mvm_remove_sta_key(struct iwl_mvm *mvm,
			   struct ieee80211_vif *vif,
			   struct ieee80211_sta *sta,
			   struct ieee80211_key_conf *keyconf)
{
2510
	bool mcast = !(keyconf->flags & IEEE80211_KEY_FLAG_PAIRWISE);
2511 2512
	struct iwl_mvm_sta *mvm_sta;
	u8 sta_id = IWL_MVM_STATION_COUNT;
2513
	int ret, i;
J
Johannes Berg 已提交
2514 2515 2516

	lockdep_assert_held(&mvm->mutex);

2517 2518
	/* Get the station from the mvm local station table */
	mvm_sta = iwl_mvm_get_key_sta(mvm, vif, sta);
J
Johannes Berg 已提交
2519 2520 2521 2522 2523 2524 2525

	IWL_DEBUG_WEP(mvm, "mvm remove dynamic key: idx=%d sta=%d\n",
		      keyconf->keyidx, sta_id);

	if (keyconf->cipher == WLAN_CIPHER_SUITE_AES_CMAC)
		return iwl_mvm_send_sta_igtk(mvm, keyconf, sta_id, true);

2526
	if (!__test_and_clear_bit(keyconf->hw_key_idx, mvm->fw_key_table)) {
J
Johannes Berg 已提交
2527 2528 2529 2530 2531
		IWL_ERR(mvm, "offset %d not used in fw key table.\n",
			keyconf->hw_key_idx);
		return -ENOENT;
	}

2532 2533 2534 2535 2536 2537 2538
	/* track which key was deleted last */
	for (i = 0; i < STA_KEY_MAX_NUM; i++) {
		if (mvm->fw_key_deleted[i] < U8_MAX)
			mvm->fw_key_deleted[i]++;
	}
	mvm->fw_key_deleted[keyconf->hw_key_idx] = 0;

2539
	if (!mvm_sta) {
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Johannes Berg 已提交
2540 2541 2542 2543
		IWL_DEBUG_WEP(mvm, "station non-existent, early return.\n");
		return 0;
	}

2544 2545
	sta_id = mvm_sta->sta_id;

2546 2547 2548 2549 2550 2551 2552 2553 2554 2555
	ret = __iwl_mvm_remove_sta_key(mvm, sta_id, keyconf, mcast);
	if (ret)
		return ret;

	/* delete WEP key twice to get rid of (now useless) offset */
	if (keyconf->cipher == WLAN_CIPHER_SUITE_WEP40 ||
	    keyconf->cipher == WLAN_CIPHER_SUITE_WEP104)
		ret = __iwl_mvm_remove_sta_key(mvm, sta_id, keyconf, !mcast);

	return ret;
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2556 2557 2558 2559 2560 2561 2562 2563
}

void iwl_mvm_update_tkip_key(struct iwl_mvm *mvm,
			     struct ieee80211_vif *vif,
			     struct ieee80211_key_conf *keyconf,
			     struct ieee80211_sta *sta, u32 iv32,
			     u16 *phase1key)
{
B
Beni Lev 已提交
2564
	struct iwl_mvm_sta *mvm_sta;
2565
	bool mcast = !(keyconf->flags & IEEE80211_KEY_FLAG_PAIRWISE);
J
Johannes Berg 已提交
2566

B
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2567 2568
	rcu_read_lock();

2569 2570
	mvm_sta = iwl_mvm_get_key_sta(mvm, vif, sta);
	if (WARN_ON_ONCE(!mvm_sta))
2571
		goto unlock;
2572
	iwl_mvm_send_sta_key(mvm, mvm_sta, keyconf, mcast,
2573
			     iv32, phase1key, CMD_ASYNC, keyconf->hw_key_idx);
2574 2575

 unlock:
B
Beni Lev 已提交
2576
	rcu_read_unlock();
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2577 2578
}

2579 2580
void iwl_mvm_sta_modify_ps_wake(struct iwl_mvm *mvm,
				struct ieee80211_sta *sta)
J
Johannes Berg 已提交
2581
{
2582
	struct iwl_mvm_sta *mvmsta = iwl_mvm_sta_from_mac80211(sta);
2583
	struct iwl_mvm_add_sta_cmd cmd = {
J
Johannes Berg 已提交
2584
		.add_modify = STA_MODE_MODIFY,
2585
		.sta_id = mvmsta->sta_id,
2586
		.station_flags_msk = cpu_to_le32(STA_FLG_PS),
2587
		.mac_id_n_color = cpu_to_le32(mvmsta->mac_id_n_color),
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2588 2589 2590
	};
	int ret;

2591 2592
	ret = iwl_mvm_send_cmd_pdu(mvm, ADD_STA, CMD_ASYNC,
				   iwl_mvm_add_sta_cmd_size(mvm), &cmd);
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Johannes Berg 已提交
2593 2594 2595 2596
	if (ret)
		IWL_ERR(mvm, "Failed to send ADD_STA command (%d)\n", ret);
}

2597 2598
void iwl_mvm_sta_modify_sleep_tx_count(struct iwl_mvm *mvm,
				       struct ieee80211_sta *sta,
J
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2599
				       enum ieee80211_frame_release_type reason,
2600 2601
				       u16 cnt, u16 tids, bool more_data,
				       bool agg)
J
Johannes Berg 已提交
2602
{
2603
	struct iwl_mvm_sta *mvmsta = iwl_mvm_sta_from_mac80211(sta);
2604
	struct iwl_mvm_add_sta_cmd cmd = {
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Johannes Berg 已提交
2605
		.add_modify = STA_MODE_MODIFY,
2606
		.sta_id = mvmsta->sta_id,
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2607 2608
		.modify_mask = STA_MODIFY_SLEEPING_STA_TX_COUNT,
		.sleep_tx_count = cpu_to_le16(cnt),
2609
		.mac_id_n_color = cpu_to_le32(mvmsta->mac_id_n_color),
J
Johannes Berg 已提交
2610
	};
2611 2612 2613 2614 2615 2616 2617 2618 2619 2620 2621 2622 2623 2624 2625 2626 2627 2628 2629
	int tid, ret;
	unsigned long _tids = tids;

	/* convert TIDs to ACs - we don't support TSPEC so that's OK
	 * Note that this field is reserved and unused by firmware not
	 * supporting GO uAPSD, so it's safe to always do this.
	 */
	for_each_set_bit(tid, &_tids, IWL_MAX_TID_COUNT)
		cmd.awake_acs |= BIT(tid_to_ucode_ac[tid]);

	/* If we're releasing frames from aggregation queues then check if the
	 * all queues combined that we're releasing frames from have
	 *  - more frames than the service period, in which case more_data
	 *    needs to be set
	 *  - fewer than 'cnt' frames, in which case we need to adjust the
	 *    firmware command (but do that unconditionally)
	 */
	if (agg) {
		int remaining = cnt;
2630
		int sleep_tx_count;
2631 2632 2633 2634 2635 2636 2637 2638 2639 2640 2641 2642 2643 2644 2645 2646 2647 2648 2649 2650 2651 2652 2653 2654

		spin_lock_bh(&mvmsta->lock);
		for_each_set_bit(tid, &_tids, IWL_MAX_TID_COUNT) {
			struct iwl_mvm_tid_data *tid_data;
			u16 n_queued;

			tid_data = &mvmsta->tid_data[tid];
			if (WARN(tid_data->state != IWL_AGG_ON &&
				 tid_data->state != IWL_EMPTYING_HW_QUEUE_DELBA,
				 "TID %d state is %d\n",
				 tid, tid_data->state)) {
				spin_unlock_bh(&mvmsta->lock);
				ieee80211_sta_eosp(sta);
				return;
			}

			n_queued = iwl_mvm_tid_queued(tid_data);
			if (n_queued > remaining) {
				more_data = true;
				remaining = 0;
				break;
			}
			remaining -= n_queued;
		}
2655 2656 2657
		sleep_tx_count = cnt - remaining;
		if (reason == IEEE80211_FRAME_RELEASE_UAPSD)
			mvmsta->sleep_tx_count = sleep_tx_count;
2658 2659
		spin_unlock_bh(&mvmsta->lock);

2660
		cmd.sleep_tx_count = cpu_to_le16(sleep_tx_count);
2661 2662 2663 2664 2665 2666 2667 2668 2669 2670 2671 2672 2673 2674 2675 2676
		if (WARN_ON(cnt - remaining == 0)) {
			ieee80211_sta_eosp(sta);
			return;
		}
	}

	/* Note: this is ignored by firmware not supporting GO uAPSD */
	if (more_data)
		cmd.sleep_state_flags |= cpu_to_le16(STA_SLEEP_STATE_MOREDATA);

	if (reason == IEEE80211_FRAME_RELEASE_PSPOLL) {
		mvmsta->next_status_eosp = true;
		cmd.sleep_state_flags |= cpu_to_le16(STA_SLEEP_STATE_PS_POLL);
	} else {
		cmd.sleep_state_flags |= cpu_to_le16(STA_SLEEP_STATE_UAPSD);
	}
J
Johannes Berg 已提交
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2678 2679 2680 2681 2682
	/* block the Tx queues until the FW updated the sleep Tx count */
	iwl_trans_block_txq_ptrs(mvm->trans, true);

	ret = iwl_mvm_send_cmd_pdu(mvm, ADD_STA,
				   CMD_ASYNC | CMD_WANT_ASYNC_CALLBACK,
2683
				   iwl_mvm_add_sta_cmd_size(mvm), &cmd);
J
Johannes Berg 已提交
2684 2685 2686
	if (ret)
		IWL_ERR(mvm, "Failed to send ADD_STA command (%d)\n", ret);
}
2687

2688 2689
void iwl_mvm_rx_eosp_notif(struct iwl_mvm *mvm,
			   struct iwl_rx_cmd_buffer *rxb)
2690 2691 2692 2693 2694 2695 2696
{
	struct iwl_rx_packet *pkt = rxb_addr(rxb);
	struct iwl_mvm_eosp_notification *notif = (void *)pkt->data;
	struct ieee80211_sta *sta;
	u32 sta_id = le32_to_cpu(notif->sta_id);

	if (WARN_ON_ONCE(sta_id >= IWL_MVM_STATION_COUNT))
2697
		return;
2698 2699 2700 2701 2702 2703 2704

	rcu_read_lock();
	sta = rcu_dereference(mvm->fw_id_to_mac_id[sta_id]);
	if (!IS_ERR_OR_NULL(sta))
		ieee80211_sta_eosp(sta);
	rcu_read_unlock();
}
2705 2706 2707 2708 2709 2710 2711 2712 2713 2714 2715 2716 2717

void iwl_mvm_sta_modify_disable_tx(struct iwl_mvm *mvm,
				   struct iwl_mvm_sta *mvmsta, bool disable)
{
	struct iwl_mvm_add_sta_cmd cmd = {
		.add_modify = STA_MODE_MODIFY,
		.sta_id = mvmsta->sta_id,
		.station_flags = disable ? cpu_to_le32(STA_FLG_DISABLE_TX) : 0,
		.station_flags_msk = cpu_to_le32(STA_FLG_DISABLE_TX),
		.mac_id_n_color = cpu_to_le32(mvmsta->mac_id_n_color),
	};
	int ret;

2718 2719
	ret = iwl_mvm_send_cmd_pdu(mvm, ADD_STA, CMD_ASYNC,
				   iwl_mvm_add_sta_cmd_size(mvm), &cmd);
2720 2721 2722
	if (ret)
		IWL_ERR(mvm, "Failed to send ADD_STA command (%d)\n", ret);
}
2723 2724 2725 2726 2727 2728 2729 2730 2731 2732 2733 2734 2735 2736 2737 2738 2739

void iwl_mvm_sta_modify_disable_tx_ap(struct iwl_mvm *mvm,
				      struct ieee80211_sta *sta,
				      bool disable)
{
	struct iwl_mvm_sta *mvm_sta = iwl_mvm_sta_from_mac80211(sta);

	spin_lock_bh(&mvm_sta->lock);

	if (mvm_sta->disable_tx == disable) {
		spin_unlock_bh(&mvm_sta->lock);
		return;
	}

	mvm_sta->disable_tx = disable;

	/*
S
Sara Sharon 已提交
2740 2741
	 * Tell mac80211 to start/stop queuing tx for this station,
	 * but don't stop queuing if there are still pending frames
2742 2743 2744 2745 2746 2747 2748 2749 2750 2751 2752 2753 2754 2755 2756 2757 2758 2759 2760 2761 2762 2763 2764 2765 2766 2767 2768 2769 2770 2771 2772 2773 2774 2775 2776
	 * for this station.
	 */
	if (disable || !atomic_read(&mvm->pending_frames[mvm_sta->sta_id]))
		ieee80211_sta_block_awake(mvm->hw, sta, disable);

	iwl_mvm_sta_modify_disable_tx(mvm, mvm_sta, disable);

	spin_unlock_bh(&mvm_sta->lock);
}

void iwl_mvm_modify_all_sta_disable_tx(struct iwl_mvm *mvm,
				       struct iwl_mvm_vif *mvmvif,
				       bool disable)
{
	struct ieee80211_sta *sta;
	struct iwl_mvm_sta *mvm_sta;
	int i;

	lockdep_assert_held(&mvm->mutex);

	/* Block/unblock all the stations of the given mvmvif */
	for (i = 0; i < IWL_MVM_STATION_COUNT; i++) {
		sta = rcu_dereference_protected(mvm->fw_id_to_mac_id[i],
						lockdep_is_held(&mvm->mutex));
		if (IS_ERR_OR_NULL(sta))
			continue;

		mvm_sta = iwl_mvm_sta_from_mac80211(sta);
		if (mvm_sta->mac_id_n_color !=
		    FW_CMD_ID_AND_COLOR(mvmvif->id, mvmvif->color))
			continue;

		iwl_mvm_sta_modify_disable_tx_ap(mvm, sta, disable);
	}
}
2777 2778 2779 2780 2781 2782 2783 2784 2785 2786 2787 2788 2789 2790 2791

void iwl_mvm_csa_client_absent(struct iwl_mvm *mvm, struct ieee80211_vif *vif)
{
	struct iwl_mvm_vif *mvmvif = iwl_mvm_vif_from_mac80211(vif);
	struct iwl_mvm_sta *mvmsta;

	rcu_read_lock();

	mvmsta = iwl_mvm_sta_from_staid_rcu(mvm, mvmvif->ap_sta_id);

	if (!WARN_ON(!mvmsta))
		iwl_mvm_sta_modify_disable_tx(mvm, mvmsta, true);

	rcu_read_unlock();
}