sta.c 89.8 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;

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		/* Don't try and take queues being reconfigured */
		if (mvm->queue_info[queue].status ==
		    IWL_MVM_QUEUE_RECONFIGURING)
			continue;

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		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 */
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	if (!iwl_mvm_is_dqa_data_queue(mvm, queue) &&
	    !iwl_mvm_is_dqa_mgmt_queue(mvm, queue) &&
	    (queue != IWL_MVM_DQA_BSS_CLIENT_QUEUE)) {
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		IWL_ERR(mvm, "No DATA queues available to share\n");
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		return -ENOSPC;
	}

	/* Make sure the queue isn't in the middle of being reconfigured */
	if (mvm->queue_info[queue].status == IWL_MVM_QUEUE_RECONFIGURING) {
		IWL_ERR(mvm,
			"TXQ %d is in the middle of re-config - try again\n",
			queue);
		return -EBUSY;
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	}

	return queue;
}

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/*
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 * If a given queue has a higher AC than the TID stream that is being compared
 * to, the queue needs to be redirected to the lower AC. This function does that
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 * in such a case, otherwise - if no redirection required - it does nothing,
 * unless the %force param is true.
 */
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int iwl_mvm_scd_queue_redirect(struct iwl_mvm *mvm, int queue, int tid,
			       int ac, int ssn, unsigned int wdg_timeout,
			       bool force)
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{
	struct iwl_scd_txq_cfg_cmd cmd = {
		.scd_queue = queue,
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		.action = SCD_CFG_DISABLE_QUEUE,
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	};
	bool shared_queue;
	unsigned long mq;
	int ret;

	/*
	 * If the AC is lower than current one - FIFO needs to be redirected to
	 * the lowest one of the streams in the queue. Check if this is needed
	 * here.
	 * Notice that the enum ieee80211_ac_numbers is "flipped", so BK is with
	 * value 3 and VO with value 0, so to check if ac X is lower than ac Y
	 * we need to check if the numerical value of X is LARGER than of Y.
	 */
	spin_lock_bh(&mvm->queue_info_lock);
	if (ac <= mvm->queue_info[queue].mac80211_ac && !force) {
		spin_unlock_bh(&mvm->queue_info_lock);

		IWL_DEBUG_TX_QUEUES(mvm,
				    "No redirection needed on TXQ #%d\n",
				    queue);
		return 0;
	}

	cmd.sta_id = mvm->queue_info[queue].ra_sta_id;
	cmd.tx_fifo = iwl_mvm_ac_to_tx_fifo[mvm->queue_info[queue].mac80211_ac];
565
	cmd.tid = mvm->queue_info[queue].txq_tid;
566 567 568 569
	mq = mvm->queue_info[queue].hw_queue_to_mac80211;
	shared_queue = (mvm->queue_info[queue].hw_queue_refcount > 1);
	spin_unlock_bh(&mvm->queue_info_lock);

570
	IWL_DEBUG_TX_QUEUES(mvm, "Redirecting TXQ #%d to FIFO #%d\n",
571 572 573 574 575 576 577 578 579 580 581 582 583 584 585 586 587 588 589 590 591 592 593 594
			    queue, iwl_mvm_ac_to_tx_fifo[ac]);

	/* Stop MAC queues and wait for this queue to empty */
	iwl_mvm_stop_mac_queues(mvm, mq);
	ret = iwl_trans_wait_tx_queue_empty(mvm->trans, BIT(queue));
	if (ret) {
		IWL_ERR(mvm, "Error draining queue %d before reconfig\n",
			queue);
		ret = -EIO;
		goto out;
	}

	/* Before redirecting the queue we need to de-activate it */
	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 SCD disable TXQ %d (ret=%d)\n", queue,
			ret);

	/* Make sure the SCD wrptr is correctly set before reconfiguring */
	iwl_trans_txq_enable(mvm->trans, queue, iwl_mvm_ac_to_tx_fifo[ac],
			     cmd.sta_id, tid, LINK_QUAL_AGG_FRAME_LIMIT_DEF,
			     ssn, wdg_timeout);

595 596 597 598 599
	/* Update the TID "owner" of the queue */
	spin_lock_bh(&mvm->queue_info_lock);
	mvm->queue_info[queue].txq_tid = tid;
	spin_unlock_bh(&mvm->queue_info_lock);

600 601 602 603 604 605 606 607 608 609 610 611 612 613 614 615 616 617 618 619 620 621 622 623 624 625 626 627
	/* TODO: Work-around SCD bug when moving back by multiples of 0x40 */

	/* Redirect to lower AC */
	iwl_mvm_reconfig_scd(mvm, queue, iwl_mvm_ac_to_tx_fifo[ac],
			     cmd.sta_id, tid, LINK_QUAL_AGG_FRAME_LIMIT_DEF,
			     ssn);

	/* Update AC marking of the queue */
	spin_lock_bh(&mvm->queue_info_lock);
	mvm->queue_info[queue].mac80211_ac = ac;
	spin_unlock_bh(&mvm->queue_info_lock);

	/*
	 * Mark queue as shared in transport if shared
	 * Note this has to be done after queue enablement because enablement
	 * can also set this value, and there is no indication there to shared
	 * queues
	 */
	if (shared_queue)
		iwl_trans_txq_set_shared_mode(mvm->trans, queue, true);

out:
	/* Continue using the MAC queues */
	iwl_mvm_start_mac_queues(mvm, mq);

	return ret;
}

628 629 630 631 632 633 634 635 636 637 638 639 640 641 642
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;
643 644 645
	bool using_inactive_queue = false;
	unsigned long disable_agg_tids = 0;
	enum iwl_mvm_agg_state queue_state;
646
	bool shared_queue = false;
647
	int ssn;
648
	unsigned long tfd_queue_mask;
649
	int ret;
650 651 652

	lockdep_assert_held(&mvm->mutex);

653 654 655 656
	spin_lock_bh(&mvmsta->lock);
	tfd_queue_mask = mvmsta->tfd_queue_msk;
	spin_unlock_bh(&mvmsta->lock);

657
	spin_lock_bh(&mvm->queue_info_lock);
658 659 660 661 662 663 664

	/*
	 * 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)) {
665 666
		queue = iwl_mvm_find_free_queue(mvm, mvmsta->sta_id,
						IWL_MVM_DQA_MIN_MGMT_QUEUE,
667 668 669 670 671 672 673 674
						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 */
	}

675 676 677 678 679
	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)) {
680
		queue = mvmsta->reserved_queue;
681
		mvm->queue_info[queue].reserved = true;
682 683 684 685
		IWL_DEBUG_TX_QUEUES(mvm, "Using reserved queue #%d\n", queue);
	}

	if (queue < 0)
686 687
		queue = iwl_mvm_find_free_queue(mvm, mvmsta->sta_id,
						IWL_MVM_DQA_MIN_DATA_QUEUE,
688
						IWL_MVM_DQA_MAX_DATA_QUEUE);
689

690 691 692 693 694 695 696 697 698 699 700 701 702 703 704
	/*
	 * 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);
	}

705 706 707 708 709 710 711 712 713
	/* 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;
		}
	}

714 715 716 717 718 719
	/*
	 * 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.
	 */
720
	if ((queue > 0) && !shared_queue)
721
		mvm->queue_info[queue].status = IWL_MVM_QUEUE_READY;
722

723
	spin_unlock_bh(&mvm->queue_info_lock);
724

725 726 727 728
	/* 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);
729
		return queue;
730
	}
731 732 733 734 735 736 737

	/*
	 * 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
	 */
738 739
	cfg.aggregate = (queue >= IWL_MVM_DQA_MIN_DATA_QUEUE ||
			 queue == IWL_MVM_DQA_BSS_CLIENT_QUEUE);
740

741 742 743 744 745 746 747
	/*
	 * 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,
748
			.action = SCD_CFG_DISABLE_QUEUE,
749
		};
750
		u8 ac;
751 752 753

		disable_agg_tids = iwl_mvm_remove_sta_queue_marking(mvm, queue);

754 755 756 757
		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];
758
		cmd.tid = mvm->queue_info[queue].txq_tid;
759 760
		spin_unlock_bh(&mvm->queue_info_lock);

761
		/* Disable the queue */
762 763 764
		if (disable_agg_tids)
			iwl_mvm_invalidate_sta_queue(mvm, queue,
						     disable_agg_tids, false);
765 766 767 768 769 770 771 772 773 774 775 776 777 778 779
		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;
		}
780 781 782 783

		/* If TXQ is allocated to another STA, update removal in FW */
		if (cmd.sta_id != mvmsta->sta_id)
			iwl_mvm_invalidate_sta_queue(mvm, queue, 0, true);
784 785
	}

786 787 788 789 790 791 792 793 794 795 796 797 798 799 800 801
	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);
		}
	}
802 803 804 805 806

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

807 808 809 810 811 812 813 814 815
	/*
	 * Mark queue as shared in transport if shared
	 * Note this has to be done after queue enablement because enablement
	 * can also set this value, and there is no indication there to shared
	 * queues
	 */
	if (shared_queue)
		iwl_trans_txq_set_shared_mode(mvm->trans, queue, true);

816 817
	spin_lock_bh(&mvmsta->lock);
	mvmsta->tid_data[tid].txq_id = queue;
818
	mvmsta->tid_data[tid].is_tid_active = true;
819
	mvmsta->tfd_queue_msk |= BIT(queue);
820
	queue_state = mvmsta->tid_data[tid].state;
821 822 823 824 825

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

826 827 828 829
	if (!shared_queue) {
		ret = iwl_mvm_sta_send_to_fw(mvm, sta, true, STA_MODIFY_QUEUES);
		if (ret)
			goto out_err;
830

831 832 833 834 835 836
		/* 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;
		}
837 838 839 840 841 842
	} else {
		/* Redirect queue, if needed */
		ret = iwl_mvm_scd_queue_redirect(mvm, queue, tid, ac, ssn,
						 wdg_timeout, false);
		if (ret)
			goto out_err;
843
	}
844

845
	return 0;
846 847 848 849 850

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

	return ret;
851 852
}

853 854 855 856 857 858 859 860 861 862 863 864 865 866 867 868 869 870 871 872 873 874 875 876 877 878 879 880 881 882 883 884 885 886 887
static void iwl_mvm_change_queue_owner(struct iwl_mvm *mvm, int queue)
{
	struct iwl_scd_txq_cfg_cmd cmd = {
		.scd_queue = queue,
		.action = SCD_CFG_UPDATE_QUEUE_TID,
	};
	s8 sta_id;
	int tid;
	unsigned long tid_bitmap;
	int ret;

	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);

	if (WARN(!tid_bitmap, "TXQ %d has no tids assigned to it\n", queue))
		return;

	/* Find any TID for queue */
	tid = find_first_bit(&tid_bitmap, IWL_MAX_TID_COUNT + 1);
	cmd.tid = tid;
	cmd.tx_fifo = iwl_mvm_ac_to_tx_fifo[tid_to_mac80211_ac[tid]];

	ret = iwl_mvm_send_cmd_pdu(mvm, SCD_QUEUE_CFG, 0, sizeof(cmd), &cmd);
	if (ret)
		IWL_ERR(mvm, "Failed to update owner of TXQ %d (ret=%d)\n",
			queue, ret);
	else
		IWL_DEBUG_TX_QUEUES(mvm, "Changed TXQ %d ownership to tid %d\n",
				    queue, tid);
}

888 889 890 891 892 893 894 895 896 897 898 899 900 901 902 903 904 905 906 907 908 909 910 911 912 913 914 915 916 917 918 919 920 921 922 923 924 925 926 927 928 929 930 931 932 933 934 935 936 937 938 939 940 941 942 943 944 945 946 947 948 949 950 951 952 953 954 955 956 957 958 959 960 961 962 963 964 965
static void iwl_mvm_unshare_queue(struct iwl_mvm *mvm, int queue)
{
	struct ieee80211_sta *sta;
	struct iwl_mvm_sta *mvmsta;
	s8 sta_id;
	int tid = -1;
	unsigned long tid_bitmap;
	unsigned int wdg_timeout;
	int ssn;
	int ret = true;

	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);

	/* Find TID for queue, and make sure it is the only one on the queue */
	tid = find_first_bit(&tid_bitmap, IWL_MAX_TID_COUNT + 1);
	if (tid_bitmap != BIT(tid)) {
		IWL_ERR(mvm, "Failed to unshare q %d, active tids=0x%lx\n",
			queue, tid_bitmap);
		return;
	}

	IWL_DEBUG_TX_QUEUES(mvm, "Unsharing TXQ %d, keeping tid %d\n", queue,
			    tid);

	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;

	mvmsta = iwl_mvm_sta_from_mac80211(sta);
	wdg_timeout = iwl_mvm_get_wd_timeout(mvm, mvmsta->vif, false, false);

	ssn = IEEE80211_SEQ_TO_SN(mvmsta->tid_data[tid].seq_number);

	ret = iwl_mvm_scd_queue_redirect(mvm, queue, tid,
					 tid_to_mac80211_ac[tid], ssn,
					 wdg_timeout, true);
	if (ret) {
		IWL_ERR(mvm, "Failed to redirect TXQ %d\n", queue);
		return;
	}

	/* If aggs should be turned back on - do it */
	if (mvmsta->tid_data[tid].state == IWL_AGG_ON) {
		struct iwl_mvm_add_sta_cmd cmd;

		mvmsta->tid_disable_agg &= ~BIT(tid);

		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_TID_DISABLE_TX;
		cmd.tfd_queue_msk = cpu_to_le32(mvmsta->tfd_queue_msk);
		cmd.tid_disable_tx = cpu_to_le16(mvmsta->tid_disable_agg);

		ret = iwl_mvm_send_cmd_pdu(mvm, ADD_STA, CMD_ASYNC,
					   iwl_mvm_add_sta_cmd_size(mvm), &cmd);
		if (!ret) {
			IWL_DEBUG_TX_QUEUES(mvm,
					    "TXQ #%d is now aggregated again\n",
					    queue);

			/* Mark queue intenally as aggregating again */
			iwl_trans_txq_set_shared_mode(mvm->trans, queue, false);
		}
	}

	spin_lock_bh(&mvm->queue_info_lock);
	mvm->queue_info[queue].status = IWL_MVM_QUEUE_READY;
	spin_unlock_bh(&mvm->queue_info_lock);
}

966 967 968 969 970 971 972 973 974 975 976 977 978 979 980 981 982 983 984 985 986 987 988 989 990 991 992 993 994 995 996 997 998 999 1000 1001 1002 1003 1004 1005 1006 1007 1008 1009 1010
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);

1011 1012
	/* Disable bottom-halves when entering TX path */
	local_bh_disable();
1013 1014 1015 1016 1017 1018 1019 1020 1021 1022 1023 1024 1025 1026 1027 1028 1029 1030 1031 1032
	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;
1033
	int queue, sta_id, tid;
1034

1035 1036 1037
	/* Check inactivity of queues */
	iwl_mvm_inactivity_check(mvm);

1038 1039
	mutex_lock(&mvm->mutex);

1040 1041 1042
	/* Reconfigure queues requiring reconfiguation */
	for (queue = 0; queue < IWL_MAX_HW_QUEUES; queue++) {
		bool reconfig;
1043
		bool change_owner;
1044 1045 1046 1047

		spin_lock_bh(&mvm->queue_info_lock);
		reconfig = (mvm->queue_info[queue].status ==
			    IWL_MVM_QUEUE_RECONFIGURING);
1048 1049 1050 1051 1052 1053 1054 1055 1056 1057 1058 1059 1060

		/*
		 * We need to take into account a situation in which a TXQ was
		 * allocated to TID x, and then turned shared by adding TIDs y
		 * and z. If TID x becomes inactive and is removed from the TXQ,
		 * ownership must be given to one of the remaining TIDs.
		 * This is mainly because if TID x continues - a new queue can't
		 * be allocated for it as long as it is an owner of another TXQ.
		 */
		change_owner = !(mvm->queue_info[queue].tid_bitmap &
				 BIT(mvm->queue_info[queue].txq_tid)) &&
			       (mvm->queue_info[queue].status ==
				IWL_MVM_QUEUE_SHARED);
1061 1062 1063 1064
		spin_unlock_bh(&mvm->queue_info_lock);

		if (reconfig)
			iwl_mvm_unshare_queue(mvm, queue);
1065 1066
		else if (change_owner)
			iwl_mvm_change_queue_owner(mvm, queue);
1067 1068
	}

1069 1070 1071 1072 1073 1074 1075 1076 1077 1078 1079 1080 1081 1082 1083 1084 1085 1086 1087 1088 1089
	/* 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,
1090 1091
				      struct ieee80211_sta *sta,
				      enum nl80211_iftype vif_type)
1092 1093 1094 1095
{
	struct iwl_mvm_sta *mvmsta = iwl_mvm_sta_from_mac80211(sta);
	int queue;

1096 1097 1098 1099 1100 1101
	/*
	 * 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);

1102 1103 1104
	spin_lock_bh(&mvm->queue_info_lock);

	/* Make sure we have free resources for this STA */
1105 1106
	if (vif_type == NL80211_IFTYPE_STATION && !sta->tdls &&
	    !mvm->queue_info[IWL_MVM_DQA_BSS_CLIENT_QUEUE].hw_queue_refcount &&
1107 1108
	    (mvm->queue_info[IWL_MVM_DQA_BSS_CLIENT_QUEUE].status ==
	     IWL_MVM_QUEUE_FREE))
1109 1110
		queue = IWL_MVM_DQA_BSS_CLIENT_QUEUE;
	else
1111 1112
		queue = iwl_mvm_find_free_queue(mvm, mvmsta->sta_id,
						IWL_MVM_DQA_MIN_DATA_QUEUE,
1113
						IWL_MVM_DQA_MAX_DATA_QUEUE);
1114 1115 1116 1117 1118
	if (queue < 0) {
		spin_unlock_bh(&mvm->queue_info_lock);
		IWL_ERR(mvm, "No available queues for new station\n");
		return -ENOSPC;
	}
1119
	mvm->queue_info[queue].status = IWL_MVM_QUEUE_RESERVED;
1120 1121 1122 1123 1124 1125 1126 1127 1128 1129 1130

	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;
}

1131 1132 1133 1134 1135 1136 1137 1138 1139 1140 1141 1142 1143 1144 1145 1146 1147 1148 1149 1150 1151 1152 1153 1154 1155 1156 1157 1158 1159 1160 1161 1162 1163 1164 1165 1166 1167 1168 1169 1170 1171 1172 1173 1174 1175 1176 1177 1178 1179 1180 1181 1182 1183 1184 1185
/*
 * In DQA mode, after a HW restart the queues should be allocated as before, in
 * order to avoid race conditions when there are shared queues. This function
 * does the re-mapping and queue allocation.
 *
 * Note that re-enabling aggregations isn't done in this function.
 */
static void iwl_mvm_realloc_queues_after_restart(struct iwl_mvm *mvm,
						 struct iwl_mvm_sta *mvm_sta)
{
	unsigned int wdg_timeout =
			iwl_mvm_get_wd_timeout(mvm, mvm_sta->vif, false, false);
	int i;
	struct iwl_trans_txq_scd_cfg cfg = {
		.sta_id = mvm_sta->sta_id,
		.frame_limit = IWL_FRAME_LIMIT,
	};

	/* Make sure reserved queue is still marked as such (or allocated) */
	mvm->queue_info[mvm_sta->reserved_queue].status =
		IWL_MVM_QUEUE_RESERVED;

	for (i = 0; i <= IWL_MAX_TID_COUNT; i++) {
		struct iwl_mvm_tid_data *tid_data = &mvm_sta->tid_data[i];
		int txq_id = tid_data->txq_id;
		int ac;
		u8 mac_queue;

		if (txq_id == IEEE80211_INVAL_HW_QUEUE)
			continue;

		skb_queue_head_init(&tid_data->deferred_tx_frames);

		ac = tid_to_mac80211_ac[i];
		mac_queue = mvm_sta->vif->hw_queue[ac];

		cfg.tid = i;
		cfg.fifo = iwl_mvm_ac_to_tx_fifo[ac];
		cfg.aggregate = (txq_id >= IWL_MVM_DQA_MIN_DATA_QUEUE ||
				 txq_id == IWL_MVM_DQA_BSS_CLIENT_QUEUE);

		IWL_DEBUG_TX_QUEUES(mvm,
				    "Re-mapping sta %d tid %d to queue %d\n",
				    mvm_sta->sta_id, i, txq_id);

		iwl_mvm_enable_txq(mvm, txq_id, mac_queue,
				   IEEE80211_SEQ_TO_SN(tid_data->seq_number),
				   &cfg, wdg_timeout);

		mvm->queue_info[txq_id].status = IWL_MVM_QUEUE_READY;
	}

	atomic_set(&mvm->pending_frames[mvm_sta->sta_id], 0);
}

J
Johannes Berg 已提交
1186 1187 1188 1189 1190
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);
1191
	struct iwl_mvm_sta *mvm_sta = iwl_mvm_sta_from_mac80211(sta);
1192
	struct iwl_mvm_rxq_dup_data *dup_data;
J
Johannes Berg 已提交
1193 1194 1195 1196 1197
	int i, ret, sta_id;

	lockdep_assert_held(&mvm->mutex);

	if (!test_bit(IWL_MVM_STATUS_IN_HW_RESTART, &mvm->status))
1198 1199
		sta_id = iwl_mvm_find_free_sta_id(mvm,
						  ieee80211_vif_type_p2p(vif));
J
Johannes Berg 已提交
1200 1201 1202
	else
		sta_id = mvm_sta->sta_id;

1203
	if (sta_id == IWL_MVM_STATION_COUNT)
J
Johannes Berg 已提交
1204 1205 1206 1207
		return -ENOSPC;

	spin_lock_init(&mvm_sta->lock);

1208 1209 1210 1211 1212 1213 1214
	/* In DQA mode, if this is a HW restart, re-alloc existing queues */
	if (iwl_mvm_is_dqa_supported(mvm) &&
	    test_bit(IWL_MVM_STATUS_IN_HW_RESTART, &mvm->status)) {
		iwl_mvm_realloc_queues_after_restart(mvm, mvm_sta);
		goto update_fw;
	}

J
Johannes Berg 已提交
1215 1216 1217 1218 1219
	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;
1220 1221
	mvm_sta->tx_protection = 0;
	mvm_sta->tt_tx_protection = false;
J
Johannes Berg 已提交
1222 1223

	/* HW restart, don't assume the memory has been zeroed */
1224
	atomic_set(&mvm->pending_frames[sta_id], 0);
1225
	mvm_sta->tid_disable_agg = 0xffff; /* No aggs at first */
J
Johannes Berg 已提交
1226
	mvm_sta->tfd_queue_msk = 0;
1227

1228 1229 1230 1231 1232
	/*
	 * Allocate new queues for a TDLS station, unless we're in DQA mode,
	 * and then they'll be allocated dynamically
	 */
	if (!iwl_mvm_is_dqa_supported(mvm) && sta->tdls) {
1233 1234 1235
		ret = iwl_mvm_tdls_sta_init(mvm, sta);
		if (ret)
			return ret;
1236
	} else if (!iwl_mvm_is_dqa_supported(mvm)) {
1237 1238 1239 1240
		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
1241

1242
	/* for HW restart - reset everything but the sequence number */
1243
	for (i = 0; i <= IWL_MAX_TID_COUNT; i++) {
1244 1245 1246
		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;
1247 1248 1249 1250 1251 1252 1253 1254 1255 1256

		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);
1257
	}
1258
	mvm_sta->deferred_traffic_tid_map = 0;
1259
	mvm_sta->agg_tids = 0;
J
Johannes Berg 已提交
1260

1261 1262 1263 1264 1265 1266 1267 1268 1269 1270
	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;
	}

1271
	if (iwl_mvm_is_dqa_supported(mvm)) {
1272 1273
		ret = iwl_mvm_reserve_sta_stream(mvm, sta,
						 ieee80211_vif_type_p2p(vif));
1274 1275 1276 1277
		if (ret)
			goto err;
	}

1278
update_fw:
1279
	ret = iwl_mvm_sta_send_to_fw(mvm, sta, false, 0);
J
Johannes Berg 已提交
1280
	if (ret)
1281
		goto err;
J
Johannes Berg 已提交
1282

1283 1284 1285 1286 1287 1288 1289 1290
	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);
		}
	}
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1291 1292 1293 1294

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

	return 0;
1295 1296

err:
1297 1298
	if (!iwl_mvm_is_dqa_supported(mvm) && sta->tdls)
		iwl_mvm_tdls_sta_deinit(mvm, sta);
1299
	return ret;
J
Johannes Berg 已提交
1300 1301
}

1302 1303 1304 1305
int iwl_mvm_update_sta(struct iwl_mvm *mvm,
		       struct ieee80211_vif *vif,
		       struct ieee80211_sta *sta)
{
1306
	return iwl_mvm_sta_send_to_fw(mvm, sta, true, 0);
1307 1308
}

J
Johannes Berg 已提交
1309 1310 1311
int iwl_mvm_drain_sta(struct iwl_mvm *mvm, struct iwl_mvm_sta *mvmsta,
		      bool drain)
{
1312
	struct iwl_mvm_add_sta_cmd cmd = {};
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1313 1314 1315 1316 1317 1318 1319 1320 1321 1322 1323 1324
	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;
1325 1326
	ret = iwl_mvm_send_cmd_pdu_status(mvm, ADD_STA,
					  iwl_mvm_add_sta_cmd_size(mvm),
1327
					  &cmd, &status);
J
Johannes Berg 已提交
1328 1329 1330
	if (ret)
		return ret;

1331
	switch (status & IWL_ADD_STA_STATUS_MASK) {
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1332 1333 1334 1335 1336 1337 1338 1339 1340 1341 1342 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
	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
1368
	ret = iwl_mvm_send_cmd_pdu(mvm, REMOVE_STA, 0,
J
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1369 1370 1371 1372 1373 1374 1375 1376 1377 1378 1379 1380 1381 1382 1383 1384 1385 1386 1387 1388 1389 1390 1391 1392 1393 1394 1395 1396 1397
				   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));

1398 1399 1400 1401 1402 1403 1404 1405 1406
		/*
		 * 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)
J
Johannes Berg 已提交
1407 1408 1409 1410 1411 1412 1413 1414 1415 1416 1417 1418 1419 1420 1421 1422 1423 1424 1425 1426 1427 1428 1429 1430 1431
			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;
		}
1432
		RCU_INIT_POINTER(mvm->fw_id_to_mac_id[sta_id], NULL);
J
Johannes Berg 已提交
1433
		clear_bit(sta_id, mvm->sta_drained);
1434 1435 1436 1437

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

1438
			for_each_set_bit(i, &msk, sizeof(msk) * BITS_PER_BYTE)
1439 1440
				iwl_mvm_disable_txq(mvm, i, i,
						    IWL_MAX_TID_COUNT, 0);
1441 1442 1443 1444 1445

			mvm->tfd_drained[sta_id] = 0;
			IWL_DEBUG_TDLS(mvm, "Drained sta %d, with queues %ld\n",
				       sta_id, msk);
		}
J
Johannes Berg 已提交
1446 1447 1448 1449 1450
	}

	mutex_unlock(&mvm->mutex);
}

1451 1452 1453 1454 1455 1456 1457 1458 1459 1460 1461 1462 1463 1464 1465 1466 1467 1468 1469 1470
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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1471 1472 1473 1474 1475
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);
1476
	struct iwl_mvm_sta *mvm_sta = iwl_mvm_sta_from_mac80211(sta);
J
Johannes Berg 已提交
1477 1478 1479 1480
	int ret;

	lockdep_assert_held(&mvm->mutex);

1481 1482 1483
	if (iwl_mvm_has_new_rx_api(mvm))
		kfree(mvm_sta->dup_data);

1484 1485 1486
	if ((vif->type == NL80211_IFTYPE_STATION &&
	     mvmvif->ap_sta_id == mvm_sta->sta_id) ||
	    iwl_mvm_is_dqa_supported(mvm)){
1487 1488 1489
		ret = iwl_mvm_drain_sta(mvm, mvm_sta, true);
		if (ret)
			return ret;
1490
		/* flush its queues here since we are freeing mvm_sta */
1491
		ret = iwl_mvm_flush_tx_path(mvm, mvm_sta->tfd_queue_msk, 0);
1492 1493 1494 1495 1496 1497 1498
		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);
1499

1500 1501 1502 1503
		/* 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);

1504 1505 1506 1507 1508
		if (vif->type == NL80211_IFTYPE_STATION &&
		    mvmvif->ap_sta_id == mvm_sta->sta_id) {
			/* if associated - we can't remove the AP STA now */
			if (vif->bss_conf.assoc)
				return ret;
J
Johannes Berg 已提交
1509

1510 1511
			/* unassoc - go ahead - remove the AP STA now */
			mvmvif->ap_sta_id = IWL_MVM_STATION_COUNT;
1512

1513 1514 1515 1516
			/* 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;
		}
J
Johannes Berg 已提交
1517 1518
	}

1519 1520 1521 1522 1523 1524 1525 1526 1527
	/*
	 * 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);
	}

1528 1529 1530 1531 1532
	/*
	 * Make sure that the tx response code sees the station as -EBUSY and
	 * calls the drain worker.
	 */
	spin_lock_bh(&mvm_sta->lock);
J
Johannes Berg 已提交
1533 1534 1535 1536
	/*
	 * There are frames pending on the AC queues for this station.
	 * We need to wait until all the frames are drained...
	 */
1537
	if (atomic_read(&mvm->pending_frames[mvm_sta->sta_id])) {
J
Johannes Berg 已提交
1538 1539
		rcu_assign_pointer(mvm->fw_id_to_mac_id[mvm_sta->sta_id],
				   ERR_PTR(-EBUSY));
1540
		spin_unlock_bh(&mvm_sta->lock);
1541 1542 1543 1544 1545 1546 1547 1548 1549

		/* 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);
		}

1550
		ret = iwl_mvm_drain_sta(mvm, mvm_sta, true);
J
Johannes Berg 已提交
1551
	} else {
1552
		spin_unlock_bh(&mvm_sta->lock);
1553

1554
		if (!iwl_mvm_is_dqa_supported(mvm) && sta->tdls)
1555 1556
			iwl_mvm_tdls_sta_deinit(mvm, sta);

J
Johannes Berg 已提交
1557
		ret = iwl_mvm_rm_sta_common(mvm, mvm_sta->sta_id);
1558
		RCU_INIT_POINTER(mvm->fw_id_to_mac_id[mvm_sta->sta_id], NULL);
J
Johannes Berg 已提交
1559 1560 1561 1562 1563 1564 1565 1566 1567 1568 1569 1570 1571
	}

	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);

1572
	RCU_INIT_POINTER(mvm->fw_id_to_mac_id[sta_id], NULL);
J
Johannes Berg 已提交
1573 1574 1575
	return ret;
}

1576 1577 1578
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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1579 1580
{
	if (!test_bit(IWL_MVM_STATUS_IN_HW_RESTART, &mvm->status)) {
1581
		sta->sta_id = iwl_mvm_find_free_sta_id(mvm, iftype);
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1582 1583 1584 1585 1586 1587 1588 1589 1590 1591 1592
		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;
}

1593 1594
static void iwl_mvm_dealloc_int_sta(struct iwl_mvm *mvm,
				    struct iwl_mvm_int_sta *sta)
J
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1595
{
1596
	RCU_INIT_POINTER(mvm->fw_id_to_mac_id[sta->sta_id], NULL);
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1597 1598 1599 1600 1601 1602 1603 1604 1605
	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)
{
1606
	struct iwl_mvm_add_sta_cmd cmd;
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1607 1608 1609 1610 1611
	int ret;
	u32 status;

	lockdep_assert_held(&mvm->mutex);

1612
	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);
1618
	cmd.tid_disable_tx = cpu_to_le16(0xffff);
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1619 1620 1621 1622

	if (addr)
		memcpy(cmd.addr, addr, ETH_ALEN);

1623 1624
	ret = iwl_mvm_send_cmd_pdu_status(mvm, ADD_STA,
					  iwl_mvm_add_sta_cmd_size(mvm),
1625
					  &cmd, &status);
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1626 1627 1628
	if (ret)
		return ret;

1629
	switch (status & IWL_ADD_STA_STATUS_MASK) {
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1630 1631 1632 1633 1634 1635 1636 1637 1638 1639 1640 1641 1642 1643
	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)
{
1644 1645 1646
	unsigned int wdg_timeout = iwlmvm_mod_params.tfd_q_hang_detect ?
					mvm->cfg->base_params->wd_timeout :
					IWL_WATCHDOG_DISABLED;
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1647 1648 1649 1650
	int ret;

	lockdep_assert_held(&mvm->mutex);

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1651
	/* Map Aux queue to fifo - needs to happen before adding Aux station */
1652 1653 1654
	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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1655 1656 1657

	/* Allocate aux station and assign to it the aux queue */
	ret = iwl_mvm_allocate_int_sta(mvm, &mvm->aux_sta, BIT(mvm->aux_queue),
1658
				       NL80211_IFTYPE_UNSPECIFIED);
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1659 1660 1661
	if (ret)
		return ret;

1662 1663 1664 1665 1666 1667 1668 1669 1670 1671 1672 1673 1674
	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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1675 1676 1677 1678 1679 1680 1681 1682
	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;
}

1683 1684 1685 1686 1687 1688 1689 1690 1691 1692 1693 1694 1695 1696 1697 1698 1699 1700 1701 1702 1703 1704 1705 1706 1707 1708 1709
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);
}

1710 1711 1712 1713 1714 1715 1716
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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1717 1718 1719 1720 1721 1722 1723 1724
/*
 * 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.
 */
1725
int iwl_mvm_send_add_bcast_sta(struct iwl_mvm *mvm, struct ieee80211_vif *vif)
J
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1726 1727
{
	struct iwl_mvm_vif *mvmvif = iwl_mvm_vif_from_mac80211(vif);
1728
	struct iwl_mvm_int_sta *bsta = &mvmvif->bcast_sta;
J
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1729
	static const u8 _baddr[] = {0xFF, 0xFF, 0xFF, 0xFF, 0xFF, 0xFF};
1730
	const u8 *baddr = _baddr;
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1731 1732 1733

	lockdep_assert_held(&mvm->mutex);

1734 1735 1736 1737 1738 1739 1740 1741 1742 1743 1744 1745 1746 1747 1748 1749
	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;
1750 1751 1752 1753
		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;
1754 1755 1756 1757 1758 1759 1760
		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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1761 1762 1763
	if (vif->type == NL80211_IFTYPE_ADHOC)
		baddr = vif->bss_conf.bssid;

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1764 1765 1766 1767 1768 1769 1770 1771 1772
	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. */
1773
int iwl_mvm_send_rm_bcast_sta(struct iwl_mvm *mvm, struct ieee80211_vif *vif)
J
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1774
{
1775
	struct iwl_mvm_vif *mvmvif = iwl_mvm_vif_from_mac80211(vif);
J
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1776 1777 1778 1779
	int ret;

	lockdep_assert_held(&mvm->mutex);

1780
	ret = iwl_mvm_rm_sta_common(mvm, mvmvif->bcast_sta.sta_id);
J
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1781 1782 1783 1784 1785
	if (ret)
		IWL_WARN(mvm, "Failed sending remove station\n");
	return ret;
}

1786 1787 1788
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);
1789
	u32 qmask = 0;
1790 1791 1792

	lockdep_assert_held(&mvm->mutex);

1793 1794
	if (!iwl_mvm_is_dqa_supported(mvm))
		qmask = iwl_mvm_mac_get_queues_mask(vif);
1795

1796 1797 1798 1799 1800 1801
	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.
		 */
1802 1803
		qmask &= ~BIT(vif->cab_queue);

1804 1805
		if (iwl_mvm_is_dqa_supported(mvm))
			qmask |= BIT(IWL_MVM_DQA_AP_PROBE_RESP_QUEUE);
1806 1807 1808
	} else if (iwl_mvm_is_dqa_supported(mvm) &&
		   vif->type == NL80211_IFTYPE_P2P_DEVICE) {
		qmask |= BIT(IWL_MVM_DQA_P2P_DEVICE_QUEUE);
1809 1810
	}

1811 1812 1813 1814
	return iwl_mvm_allocate_int_sta(mvm, &mvmvif->bcast_sta, qmask,
					ieee80211_vif_type_p2p(vif));
}

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1815 1816 1817 1818 1819 1820 1821
/* 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. */
1822
int iwl_mvm_add_bcast_sta(struct iwl_mvm *mvm, struct ieee80211_vif *vif)
J
Johannes Berg 已提交
1823 1824
{
	struct iwl_mvm_vif *mvmvif = iwl_mvm_vif_from_mac80211(vif);
1825
	struct iwl_mvm_int_sta *bsta = &mvmvif->bcast_sta;
J
Johannes Berg 已提交
1826 1827 1828 1829
	int ret;

	lockdep_assert_held(&mvm->mutex);

1830
	ret = iwl_mvm_alloc_bcast_sta(mvm, vif);
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Johannes Berg 已提交
1831 1832 1833
	if (ret)
		return ret;

1834
	ret = iwl_mvm_send_add_bcast_sta(mvm, vif);
J
Johannes Berg 已提交
1835 1836 1837

	if (ret)
		iwl_mvm_dealloc_int_sta(mvm, bsta);
1838

J
Johannes Berg 已提交
1839 1840 1841
	return ret;
}

1842 1843 1844 1845 1846 1847 1848
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);
}

J
Johannes Berg 已提交
1849 1850 1851 1852
/*
 * 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.
 */
1853
int iwl_mvm_rm_bcast_sta(struct iwl_mvm *mvm, struct ieee80211_vif *vif)
J
Johannes Berg 已提交
1854 1855 1856 1857 1858
{
	int ret;

	lockdep_assert_held(&mvm->mutex);

1859 1860 1861
	ret = iwl_mvm_send_rm_bcast_sta(mvm, vif);

	iwl_mvm_dealloc_bcast_sta(mvm, vif);
J
Johannes Berg 已提交
1862 1863 1864 1865

	return ret;
}

1866 1867
#define IWL_MAX_RX_BA_SESSIONS 16

1868
static void iwl_mvm_sync_rxq_del_ba(struct iwl_mvm *mvm, u8 baid)
1869
{
1870 1871 1872 1873
	struct iwl_mvm_delba_notif notif = {
		.metadata.type = IWL_MVM_RXQ_NOTIF_DEL_BA,
		.metadata.sync = 1,
		.delba.baid = baid,
1874
	};
1875 1876
	iwl_mvm_sync_rx_queues_internal(mvm, (void *)&notif, sizeof(notif));
};
1877

1878 1879 1880 1881 1882 1883 1884 1885 1886 1887 1888 1889
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];

1890 1891 1892
		spin_lock_bh(&reorder_buf->lock);
		if (likely(!reorder_buf->num_stored)) {
			spin_unlock_bh(&reorder_buf->lock);
1893
			continue;
1894
		}
1895 1896 1897 1898 1899 1900 1901 1902 1903 1904

		/*
		 * 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]);
1905 1906 1907 1908 1909 1910 1911 1912 1913 1914 1915
		/*
		 * 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);
1916 1917 1918 1919 1920 1921 1922 1923 1924 1925 1926 1927 1928 1929 1930 1931 1932 1933
	}
}

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;
1934 1935 1936 1937 1938 1939 1940
		/* 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;
1941 1942 1943 1944 1945
		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]);
	}
1946 1947
}

J
Johannes Berg 已提交
1948
int iwl_mvm_sta_rx_agg(struct iwl_mvm *mvm, struct ieee80211_sta *sta,
1949
		       int tid, u16 ssn, bool start, u8 buf_size, u16 timeout)
J
Johannes Berg 已提交
1950
{
1951
	struct iwl_mvm_sta *mvm_sta = iwl_mvm_sta_from_mac80211(sta);
1952
	struct iwl_mvm_add_sta_cmd cmd = {};
1953
	struct iwl_mvm_baid_data *baid_data = NULL;
J
Johannes Berg 已提交
1954 1955 1956 1957 1958
	int ret;
	u32 status;

	lockdep_assert_held(&mvm->mutex);

1959 1960 1961 1962 1963
	if (start && mvm->rx_ba_sessions >= IWL_MAX_RX_BA_SESSIONS) {
		IWL_WARN(mvm, "Not enough RX BA SESSIONS\n");
		return -ENOSPC;
	}

1964 1965 1966 1967 1968
	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
		 */
1969 1970 1971 1972
		baid_data = kzalloc(sizeof(*baid_data) +
				    mvm->trans->num_rx_queues *
				    sizeof(baid_data->reorder_buf[0]),
				    GFP_KERNEL);
1973 1974 1975 1976
		if (!baid_data)
			return -ENOMEM;
	}

J
Johannes Berg 已提交
1977 1978 1979
	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;
1980 1981 1982
	if (start) {
		cmd.add_immediate_ba_tid = (u8) tid;
		cmd.add_immediate_ba_ssn = cpu_to_le16(ssn);
1983
		cmd.rx_ba_window = cpu_to_le16((u16)buf_size);
1984 1985 1986
	} else {
		cmd.remove_immediate_ba_tid = (u8) tid;
	}
J
Johannes Berg 已提交
1987 1988 1989 1990
	cmd.modify_mask = start ? STA_MODIFY_ADD_BA_TID :
				  STA_MODIFY_REMOVE_BA_TID;

	status = ADD_STA_SUCCESS;
1991 1992
	ret = iwl_mvm_send_cmd_pdu_status(mvm, ADD_STA,
					  iwl_mvm_add_sta_cmd_size(mvm),
1993
					  &cmd, &status);
J
Johannes Berg 已提交
1994
	if (ret)
1995
		goto out_free;
J
Johannes Berg 已提交
1996

1997
	switch (status & IWL_ADD_STA_STATUS_MASK) {
J
Johannes Berg 已提交
1998
	case ADD_STA_SUCCESS:
1999 2000
		IWL_DEBUG_HT(mvm, "RX BA Session %sed in fw\n",
			     start ? "start" : "stopp");
J
Johannes Berg 已提交
2001 2002 2003 2004 2005 2006 2007 2008 2009 2010 2011 2012
		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;
	}

2013 2014 2015 2016 2017 2018 2019 2020 2021 2022 2023 2024 2025 2026 2027 2028 2029 2030 2031 2032 2033 2034 2035 2036 2037 2038 2039 2040 2041 2042 2043 2044 2045 2046
	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));

2047 2048
		iwl_mvm_init_reorder_buffer(mvm, mvm_sta->sta_id,
					    baid_data, ssn, buf_size);
2049 2050 2051 2052 2053 2054
		/*
		 * 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
		 */
2055 2056
		IWL_DEBUG_HT(mvm, "Sta %d(%d) is assigned to BAID %d\n",
			     mvm_sta->sta_id, tid, baid);
2057 2058
		WARN_ON(rcu_access_pointer(mvm->baid_map[baid]));
		rcu_assign_pointer(mvm->baid_map[baid], baid_data);
2059
	} else  {
2060 2061
		u8 baid = mvm_sta->tid_to_baid[tid];

2062 2063 2064
		if (mvm->rx_ba_sessions > 0)
			/* check that restart flow didn't zero the counter */
			mvm->rx_ba_sessions--;
2065 2066 2067 2068 2069 2070 2071 2072 2073 2074 2075
		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 */
2076
		iwl_mvm_free_reorder(mvm, baid_data);
2077 2078 2079
		del_timer_sync(&baid_data->session_timer);
		RCU_INIT_POINTER(mvm->baid_map[baid], NULL);
		kfree_rcu(baid_data, rcu_head);
2080
		IWL_DEBUG_HT(mvm, "BAID %d is free\n", baid);
2081
	}
2082
	return 0;
2083

2084 2085
out_free:
	kfree(baid_data);
J
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2086 2087 2088
	return ret;
}

2089 2090
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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2091
{
2092
	struct iwl_mvm_sta *mvm_sta = iwl_mvm_sta_from_mac80211(sta);
2093
	struct iwl_mvm_add_sta_cmd cmd = {};
J
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2094 2095 2096 2097 2098 2099 2100 2101 2102
	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 {
2103 2104 2105
		/* 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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2106 2107 2108 2109 2110 2111 2112 2113 2114 2115 2116
		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;
2117 2118
	ret = iwl_mvm_send_cmd_pdu_status(mvm, ADD_STA,
					  iwl_mvm_add_sta_cmd_size(mvm),
2119
					  &cmd, &status);
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2120 2121 2122
	if (ret)
		return ret;

2123
	switch (status & IWL_ADD_STA_STATUS_MASK) {
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2124 2125 2126 2127 2128 2129 2130 2131 2132 2133 2134 2135
	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;
}

2136
const u8 tid_to_mac80211_ac[] = {
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2137 2138 2139 2140 2141 2142 2143 2144
	IEEE80211_AC_BE,
	IEEE80211_AC_BK,
	IEEE80211_AC_BK,
	IEEE80211_AC_BE,
	IEEE80211_AC_VI,
	IEEE80211_AC_VI,
	IEEE80211_AC_VO,
	IEEE80211_AC_VO,
2145
	IEEE80211_AC_VO, /* We treat MGMT as TID 8, which is set as AC_VO */
J
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2146 2147
};

2148 2149 2150 2151 2152 2153 2154 2155 2156 2157 2158
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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2159 2160 2161
int iwl_mvm_sta_tx_agg_start(struct iwl_mvm *mvm, struct ieee80211_vif *vif,
			     struct ieee80211_sta *sta, u16 tid, u16 *ssn)
{
2162
	struct iwl_mvm_sta *mvmsta = iwl_mvm_sta_from_mac80211(sta);
J
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2163 2164
	struct iwl_mvm_tid_data *tid_data;
	int txq_id;
2165
	int ret;
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2166 2167 2168 2169 2170 2171 2172 2173 2174 2175 2176 2177

	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);

2178 2179 2180 2181 2182 2183 2184 2185 2186
	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;
	}

2187
	spin_lock(&mvm->queue_info_lock);
2188

2189 2190 2191 2192 2193 2194 2195 2196 2197
	/*
	 * 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;
2198 2199 2200 2201 2202 2203 2204 2205
	if (iwl_mvm_is_dqa_supported(mvm) &&
	    unlikely(mvm->queue_info[txq_id].status == IWL_MVM_QUEUE_SHARED)) {
		ret = -ENXIO;
		IWL_DEBUG_TX_QUEUES(mvm,
				    "Can't start tid %d agg on shared queue!\n",
				    tid);
		goto release_locks;
	} else if (!iwl_mvm_is_dqa_supported(mvm) ||
2206
	    mvm->queue_info[txq_id].status != IWL_MVM_QUEUE_READY) {
2207 2208
		txq_id = iwl_mvm_find_free_queue(mvm, mvmsta->sta_id,
						 mvm->first_agg_queue,
2209 2210 2211 2212 2213 2214 2215 2216 2217
						 mvm->last_agg_queue);
		if (txq_id < 0) {
			ret = txq_id;
			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;
2218
	}
2219 2220

	spin_unlock(&mvm->queue_info_lock);
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2221

2222 2223 2224 2225
	IWL_DEBUG_TX_QUEUES(mvm,
			    "AGG for tid %d will be on queue #%d\n",
			    tid, txq_id);

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2226
	tid_data = &mvmsta->tid_data[tid];
2227
	tid_data->ssn = IEEE80211_SEQ_TO_SN(tid_data->seq_number);
J
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2228 2229 2230 2231 2232 2233 2234 2235 2236 2237 2238 2239 2240 2241 2242
	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;
	}

2243
	ret = 0;
2244
	goto out;
2245 2246

release_locks:
2247 2248
	spin_unlock(&mvm->queue_info_lock);
out:
J
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2249 2250
	spin_unlock_bh(&mvmsta->lock);

2251
	return ret;
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2252 2253 2254
}

int iwl_mvm_sta_tx_agg_oper(struct iwl_mvm *mvm, struct ieee80211_vif *vif,
2255 2256
			    struct ieee80211_sta *sta, u16 tid, u8 buf_size,
			    bool amsdu)
J
Johannes Berg 已提交
2257
{
2258
	struct iwl_mvm_sta *mvmsta = iwl_mvm_sta_from_mac80211(sta);
J
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2259
	struct iwl_mvm_tid_data *tid_data = &mvmsta->tid_data[tid];
2260 2261
	unsigned int wdg_timeout =
		iwl_mvm_get_wd_timeout(mvm, vif, sta->tdls, false);
2262
	int queue, ret;
2263
	bool alloc_queue = true;
2264
	enum iwl_mvm_queue_status queue_status;
J
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2265 2266
	u16 ssn;

2267 2268 2269 2270 2271 2272 2273
	struct iwl_trans_txq_scd_cfg cfg = {
		.sta_id = mvmsta->sta_id,
		.tid = tid,
		.frame_limit = buf_size,
		.aggregate = true,
	};

2274 2275 2276
	BUILD_BUG_ON((sizeof(mvmsta->agg_tids) * BITS_PER_BYTE)
		     != IWL_MAX_TID_COUNT);

J
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2277 2278 2279 2280 2281 2282
	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;
2283
	mvmsta->agg_tids |= BIT(tid);
J
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2284
	tid_data->ssn = 0xffff;
2285
	tid_data->amsdu_in_ampdu_allowed = amsdu;
J
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2286 2287
	spin_unlock_bh(&mvmsta->lock);

2288
	cfg.fifo = iwl_mvm_ac_to_tx_fifo[tid_to_mac80211_ac[tid]];
J
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2289

2290 2291 2292 2293
	spin_lock_bh(&mvm->queue_info_lock);
	queue_status = mvm->queue_info[queue].status;
	spin_unlock_bh(&mvm->queue_info_lock);

2294 2295 2296 2297 2298 2299 2300 2301 2302 2303 2304 2305 2306 2307 2308 2309 2310 2311 2312 2313 2314 2315 2316 2317 2318 2319 2320 2321 2322 2323 2324 2325 2326 2327 2328 2329 2330 2331
	/* In DQA mode, the existing queue might need to be reconfigured */
	if (iwl_mvm_is_dqa_supported(mvm)) {
		/* Maybe there is no need to even alloc a queue... */
		if (mvm->queue_info[queue].status == IWL_MVM_QUEUE_READY)
			alloc_queue = false;

		/*
		 * 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);
2332

2333 2334 2335 2336 2337 2338
	/* Send ADD_STA command to enable aggs only if the queue isn't shared */
	if (queue_status != IWL_MVM_QUEUE_SHARED) {
		ret = iwl_mvm_sta_tx_agg(mvm, sta, tid, queue, true);
		if (ret)
			return -EIO;
	}
J
Johannes Berg 已提交
2339

2340 2341
	/* No need to mark as reserved */
	spin_lock_bh(&mvm->queue_info_lock);
2342
	mvm->queue_info[queue].status = IWL_MVM_QUEUE_READY;
2343 2344
	spin_unlock_bh(&mvm->queue_info_lock);

J
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2345 2346 2347 2348 2349 2350 2351 2352 2353 2354 2355
	/*
	 * 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;

2356 2357 2358
	IWL_DEBUG_HT(mvm, "Tx aggregation enabled on ra = %pM tid = %d\n",
		     sta->addr, tid);

2359
	return iwl_mvm_send_lq_cmd(mvm, &mvmsta->lq_sta.lq, false);
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2360 2361 2362 2363 2364
}

int iwl_mvm_sta_tx_agg_stop(struct iwl_mvm *mvm, struct ieee80211_vif *vif,
			    struct ieee80211_sta *sta, u16 tid)
{
2365
	struct iwl_mvm_sta *mvmsta = iwl_mvm_sta_from_mac80211(sta);
J
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2366 2367 2368 2369
	struct iwl_mvm_tid_data *tid_data = &mvmsta->tid_data[tid];
	u16 txq_id;
	int err;

2370 2371 2372 2373 2374 2375 2376 2377 2378
	/*
	 * 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;
	}

J
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2379 2380 2381 2382 2383 2384 2385
	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);

2386 2387
	mvmsta->agg_tids &= ~BIT(tid);

2388
	spin_lock_bh(&mvm->queue_info_lock);
2389 2390 2391 2392 2393 2394 2395 2396 2397
	/*
	 * 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;
2398

2399 2400
	spin_unlock_bh(&mvm->queue_info_lock);

J
Johannes Berg 已提交
2401 2402
	switch (tid_data->state) {
	case IWL_AGG_ON:
2403
		tid_data->ssn = IEEE80211_SEQ_TO_SN(tid_data->seq_number);
J
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2404 2405 2406 2407 2408 2409 2410 2411 2412 2413 2414 2415 2416

		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;
2417 2418 2419 2420 2421 2422 2423
		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);

2424 2425 2426 2427 2428
		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);
		}
2429
		return 0;
J
Johannes Berg 已提交
2430 2431 2432 2433 2434 2435 2436 2437 2438 2439 2440 2441 2442 2443 2444 2445 2446 2447 2448 2449 2450 2451 2452 2453 2454 2455 2456 2457
	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;
}

2458 2459 2460
int iwl_mvm_sta_tx_agg_flush(struct iwl_mvm *mvm, struct ieee80211_vif *vif,
			    struct ieee80211_sta *sta, u16 tid)
{
2461
	struct iwl_mvm_sta *mvmsta = iwl_mvm_sta_from_mac80211(sta);
2462 2463
	struct iwl_mvm_tid_data *tid_data = &mvmsta->tid_data[tid];
	u16 txq_id;
2464
	enum iwl_mvm_agg_state old_state;
2465 2466 2467 2468 2469 2470 2471 2472 2473

	/*
	 * 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);
2474
	old_state = tid_data->state;
2475
	tid_data->state = IWL_AGG_OFF;
2476
	mvmsta->agg_tids &= ~BIT(tid);
2477 2478
	spin_unlock_bh(&mvmsta->lock);

2479
	spin_lock_bh(&mvm->queue_info_lock);
2480 2481 2482 2483 2484 2485 2486 2487 2488
	/*
	 * 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;
2489 2490
	spin_unlock_bh(&mvm->queue_info_lock);

2491
	if (old_state >= IWL_AGG_ON) {
2492
		iwl_mvm_drain_sta(mvm, mvmsta, true);
2493
		if (iwl_mvm_flush_tx_path(mvm, BIT(txq_id), 0))
2494
			IWL_ERR(mvm, "Couldn't flush the AGG queue\n");
2495 2496 2497
		iwl_trans_wait_tx_queue_empty(mvm->trans,
					      mvmsta->tfd_queue_msk);
		iwl_mvm_drain_sta(mvm, mvmsta, false);
2498

2499 2500
		iwl_mvm_sta_tx_agg(mvm, sta, tid, txq_id, false);

2501 2502 2503 2504 2505 2506
		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);
		}
2507
	}
2508 2509 2510 2511

	return 0;
}

J
Johannes Berg 已提交
2512 2513
static int iwl_mvm_set_fw_key_idx(struct iwl_mvm *mvm)
{
2514
	int i, max = -1, max_offs = -1;
J
Johannes Berg 已提交
2515 2516 2517

	lockdep_assert_held(&mvm->mutex);

2518 2519 2520 2521 2522 2523 2524 2525 2526 2527 2528 2529 2530 2531
	/* 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
Johannes Berg 已提交
2532

2533
	if (max_offs < 0)
J
Johannes Berg 已提交
2534 2535
		return STA_KEY_IDX_INVALID;

2536
	return max_offs;
J
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2537 2538
}

2539 2540 2541
static struct iwl_mvm_sta *iwl_mvm_get_key_sta(struct iwl_mvm *mvm,
					       struct ieee80211_vif *vif,
					       struct ieee80211_sta *sta)
J
Johannes Berg 已提交
2542
{
2543
	struct iwl_mvm_vif *mvmvif = iwl_mvm_vif_from_mac80211(vif);
J
Johannes Berg 已提交
2544

2545 2546
	if (sta)
		return iwl_mvm_sta_from_mac80211(sta);
J
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2547 2548 2549 2550 2551 2552 2553

	/*
	 * 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 &&
2554 2555 2556
	    mvmvif->ap_sta_id != IWL_MVM_STATION_COUNT) {
		u8 sta_id = mvmvif->ap_sta_id;

2557 2558 2559
		sta = rcu_dereference_check(mvm->fw_id_to_mac_id[sta_id],
					    lockdep_is_held(&mvm->mutex));

2560 2561 2562 2563 2564
		/*
		 * 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.
		 */
2565 2566 2567 2568
		if (IS_ERR_OR_NULL(sta))
			return NULL;

		return iwl_mvm_sta_from_mac80211(sta);
2569
	}
J
Johannes Berg 已提交
2570

2571
	return NULL;
J
Johannes Berg 已提交
2572 2573 2574 2575
}

static int iwl_mvm_send_sta_key(struct iwl_mvm *mvm,
				struct iwl_mvm_sta *mvm_sta,
2576
				struct ieee80211_key_conf *keyconf, bool mcast,
2577 2578
				u32 tkip_iv32, u16 *tkip_p1k, u32 cmd_flags,
				u8 key_offset)
J
Johannes Berg 已提交
2579
{
2580
	struct iwl_mvm_add_sta_key_cmd cmd = {};
2581
	__le16 key_flags;
2582 2583
	int ret;
	u32 status;
J
Johannes Berg 已提交
2584 2585
	u16 keyidx;
	int i;
2586
	u8 sta_id = mvm_sta->sta_id;
J
Johannes Berg 已提交
2587 2588 2589 2590 2591 2592 2593 2594 2595

	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);
2596
		cmd.tkip_rx_tsc_byte2 = tkip_iv32;
J
Johannes Berg 已提交
2597
		for (i = 0; i < 5; i++)
2598 2599
			cmd.tkip_rx_ttak[i] = cpu_to_le16(tkip_p1k[i]);
		memcpy(cmd.key, keyconf->key, keyconf->keylen);
J
Johannes Berg 已提交
2600 2601 2602
		break;
	case WLAN_CIPHER_SUITE_CCMP:
		key_flags |= cpu_to_le16(STA_KEY_FLG_CCM);
2603
		memcpy(cmd.key, keyconf->key, keyconf->keylen);
J
Johannes Berg 已提交
2604
		break;
2605 2606
	case WLAN_CIPHER_SUITE_WEP104:
		key_flags |= cpu_to_le16(STA_KEY_FLG_WEP_13BYTES);
2607
		/* fall through */
2608 2609 2610 2611
	case WLAN_CIPHER_SUITE_WEP40:
		key_flags |= cpu_to_le16(STA_KEY_FLG_WEP);
		memcpy(cmd.key + 3, keyconf->key, keyconf->keylen);
		break;
2612 2613 2614 2615 2616 2617 2618
	case WLAN_CIPHER_SUITE_GCMP_256:
		key_flags |= cpu_to_le16(STA_KEY_FLG_KEY_32BYTES);
		/* fall through */
	case WLAN_CIPHER_SUITE_GCMP:
		key_flags |= cpu_to_le16(STA_KEY_FLG_GCMP);
		memcpy(cmd.key, keyconf->key, keyconf->keylen);
		break;
J
Johannes Berg 已提交
2619
	default:
2620 2621
		key_flags |= cpu_to_le16(STA_KEY_FLG_EXT);
		memcpy(cmd.key, keyconf->key, keyconf->keylen);
J
Johannes Berg 已提交
2622 2623
	}

2624
	if (mcast)
J
Johannes Berg 已提交
2625 2626
		key_flags |= cpu_to_le16(STA_KEY_MULTICAST);

2627
	cmd.key_offset = key_offset;
2628
	cmd.key_flags = key_flags;
J
Johannes Berg 已提交
2629 2630 2631
	cmd.sta_id = sta_id;

	status = ADD_STA_SUCCESS;
E
Emmanuel Grumbach 已提交
2632
	if (cmd_flags & CMD_ASYNC)
2633 2634
		ret =  iwl_mvm_send_cmd_pdu(mvm, ADD_STA_KEY, CMD_ASYNC,
					    sizeof(cmd), &cmd);
E
Emmanuel Grumbach 已提交
2635 2636 2637
	else
		ret = iwl_mvm_send_cmd_pdu_status(mvm, ADD_STA_KEY, sizeof(cmd),
						  &cmd, &status);
J
Johannes Berg 已提交
2638 2639 2640 2641 2642 2643 2644 2645 2646 2647 2648 2649 2650 2651 2652 2653 2654 2655 2656 2657 2658

	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 */
2659 2660 2661 2662 2663 2664 2665 2666 2667
	if (WARN_ON((keyconf->flags & IEEE80211_KEY_FLAG_PAIRWISE) ||
		    (keyconf->keyidx != 4 && keyconf->keyidx != 5) ||
		    (keyconf->cipher != WLAN_CIPHER_SUITE_AES_CMAC &&
		     keyconf->cipher != WLAN_CIPHER_SUITE_BIP_GMAC_128 &&
		     keyconf->cipher != WLAN_CIPHER_SUITE_BIP_GMAC_256)))
		return -EINVAL;

	if (WARN_ON(!iwl_mvm_has_new_rx_api(mvm) &&
		    keyconf->cipher != WLAN_CIPHER_SUITE_AES_CMAC))
J
Johannes Berg 已提交
2668 2669 2670 2671 2672 2673 2674 2675 2676 2677 2678
		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;

2679 2680 2681 2682
		switch (keyconf->cipher) {
		case WLAN_CIPHER_SUITE_AES_CMAC:
			igtk_cmd.ctrl_flags |= cpu_to_le32(STA_KEY_FLG_CCM);
			break;
2683 2684 2685 2686
		case WLAN_CIPHER_SUITE_BIP_GMAC_128:
		case WLAN_CIPHER_SUITE_BIP_GMAC_256:
			igtk_cmd.ctrl_flags |= cpu_to_le32(STA_KEY_FLG_GCMP);
			break;
2687 2688 2689 2690
		default:
			return -EINVAL;
		}

2691 2692 2693 2694
		memcpy(igtk_cmd.igtk, keyconf->key, keyconf->keylen);
		if (keyconf->cipher == WLAN_CIPHER_SUITE_BIP_GMAC_256)
			igtk_cmd.ctrl_flags |=
				cpu_to_le32(STA_KEY_FLG_KEY_32BYTES);
J
Johannes Berg 已提交
2695 2696 2697 2698 2699 2700 2701 2702 2703 2704 2705 2706 2707 2708
		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);

2709 2710 2711 2712 2713 2714 2715 2716 2717 2718 2719 2720 2721
	if (!iwl_mvm_has_new_rx_api(mvm)) {
		struct iwl_mvm_mgmt_mcast_key_cmd_v1 igtk_cmd_v1 = {
			.ctrl_flags = igtk_cmd.ctrl_flags,
			.key_id = igtk_cmd.key_id,
			.sta_id = igtk_cmd.sta_id,
			.receive_seq_cnt = igtk_cmd.receive_seq_cnt
		};

		memcpy(igtk_cmd_v1.igtk, igtk_cmd.igtk,
		       ARRAY_SIZE(igtk_cmd_v1.igtk));
		return iwl_mvm_send_cmd_pdu(mvm, MGMT_MCAST_KEY, 0,
					    sizeof(igtk_cmd_v1), &igtk_cmd_v1);
	}
E
Emmanuel Grumbach 已提交
2722
	return iwl_mvm_send_cmd_pdu(mvm, MGMT_MCAST_KEY, 0,
J
Johannes Berg 已提交
2723 2724 2725 2726 2727 2728 2729 2730
				    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)
{
2731
	struct iwl_mvm_vif *mvmvif = iwl_mvm_vif_from_mac80211(vif);
J
Johannes Berg 已提交
2732 2733 2734 2735 2736 2737 2738 2739 2740 2741 2742 2743 2744 2745 2746 2747

	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;
}

2748 2749 2750
static int __iwl_mvm_set_sta_key(struct iwl_mvm *mvm,
				 struct ieee80211_vif *vif,
				 struct ieee80211_sta *sta,
2751
				 struct ieee80211_key_conf *keyconf,
2752
				 u8 key_offset,
2753
				 bool mcast)
2754 2755 2756 2757 2758 2759 2760 2761 2762 2763 2764 2765 2766
{
	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);
2767
		ret = iwl_mvm_send_sta_key(mvm, mvm_sta, keyconf, mcast,
2768
					   seq.tkip.iv32, p1k, 0, key_offset);
2769 2770
		break;
	case WLAN_CIPHER_SUITE_CCMP:
2771 2772
	case WLAN_CIPHER_SUITE_WEP40:
	case WLAN_CIPHER_SUITE_WEP104:
2773 2774
	case WLAN_CIPHER_SUITE_GCMP:
	case WLAN_CIPHER_SUITE_GCMP_256:
2775
		ret = iwl_mvm_send_sta_key(mvm, mvm_sta, keyconf, mcast,
2776
					   0, NULL, 0, key_offset);
2777 2778
		break;
	default:
2779
		ret = iwl_mvm_send_sta_key(mvm, mvm_sta, keyconf, mcast,
2780
					   0, NULL, 0, key_offset);
2781 2782 2783 2784 2785 2786
	}

	return ret;
}

static int __iwl_mvm_remove_sta_key(struct iwl_mvm *mvm, u8 sta_id,
2787 2788
				    struct ieee80211_key_conf *keyconf,
				    bool mcast)
2789 2790 2791 2792 2793 2794 2795 2796 2797 2798 2799
{
	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);

2800
	if (mcast)
2801 2802 2803 2804 2805 2806 2807 2808 2809 2810 2811 2812 2813 2814 2815 2816 2817 2818 2819 2820 2821 2822 2823
		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
2824 2825 2826 2827
int iwl_mvm_set_sta_key(struct iwl_mvm *mvm,
			struct ieee80211_vif *vif,
			struct ieee80211_sta *sta,
			struct ieee80211_key_conf *keyconf,
2828
			u8 key_offset)
J
Johannes Berg 已提交
2829
{
2830
	bool mcast = !(keyconf->flags & IEEE80211_KEY_FLAG_PAIRWISE);
2831
	struct iwl_mvm_sta *mvm_sta;
2832
	u8 sta_id;
J
Johannes Berg 已提交
2833
	int ret;
2834
	static const u8 __maybe_unused zero_addr[ETH_ALEN] = {0};
J
Johannes Berg 已提交
2835 2836 2837 2838

	lockdep_assert_held(&mvm->mutex);

	/* Get the station id from the mvm local station table */
2839 2840 2841
	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
2842 2843
		return -EINVAL;
	}
2844
	sta_id = mvm_sta->sta_id;
J
Johannes Berg 已提交
2845

2846 2847 2848
	if (keyconf->cipher == WLAN_CIPHER_SUITE_AES_CMAC ||
	    keyconf->cipher == WLAN_CIPHER_SUITE_BIP_GMAC_128 ||
	    keyconf->cipher == WLAN_CIPHER_SUITE_BIP_GMAC_256) {
J
Johannes Berg 已提交
2849 2850 2851 2852 2853 2854 2855 2856 2857 2858 2859 2860 2861 2862 2863 2864 2865
		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;
		}
	}

2866
	if (WARN_ON_ONCE(iwl_mvm_sta_from_mac80211(sta)->vif != vif))
J
Johannes Berg 已提交
2867 2868
		return -EINVAL;

2869 2870 2871 2872 2873 2874 2875 2876 2877 2878 2879 2880 2881 2882
	/* 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
2883
			return -ENOSPC;
2884
		keyconf->hw_key_idx = key_offset;
J
Johannes Berg 已提交
2885 2886
	}

2887
	ret = __iwl_mvm_set_sta_key(mvm, vif, sta, keyconf, key_offset, mcast);
2888
	if (ret)
2889 2890 2891 2892 2893 2894 2895 2896 2897 2898
		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) {
2899 2900
		ret = __iwl_mvm_set_sta_key(mvm, vif, sta, keyconf,
					    key_offset, !mcast);
2901 2902
		if (ret) {
			__iwl_mvm_remove_sta_key(mvm, sta_id, keyconf, mcast);
2903
			goto end;
2904 2905
		}
	}
J
Johannes Berg 已提交
2906

2907 2908
	__set_bit(key_offset, mvm->fw_key_table);

J
Johannes Berg 已提交
2909 2910 2911
end:
	IWL_DEBUG_WEP(mvm, "key: cipher=%x len=%d idx=%d sta=%pM ret=%d\n",
		      keyconf->cipher, keyconf->keylen, keyconf->keyidx,
2912
		      sta ? sta->addr : zero_addr, ret);
J
Johannes Berg 已提交
2913 2914 2915 2916 2917 2918 2919 2920
	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)
{
2921
	bool mcast = !(keyconf->flags & IEEE80211_KEY_FLAG_PAIRWISE);
2922 2923
	struct iwl_mvm_sta *mvm_sta;
	u8 sta_id = IWL_MVM_STATION_COUNT;
2924
	int ret, i;
J
Johannes Berg 已提交
2925 2926 2927

	lockdep_assert_held(&mvm->mutex);

2928 2929
	/* 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
2930 2931 2932 2933

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

2934 2935 2936
	if (keyconf->cipher == WLAN_CIPHER_SUITE_AES_CMAC ||
	    keyconf->cipher == WLAN_CIPHER_SUITE_BIP_GMAC_128 ||
	    keyconf->cipher == WLAN_CIPHER_SUITE_BIP_GMAC_256)
J
Johannes Berg 已提交
2937 2938
		return iwl_mvm_send_sta_igtk(mvm, keyconf, sta_id, true);

2939
	if (!__test_and_clear_bit(keyconf->hw_key_idx, mvm->fw_key_table)) {
J
Johannes Berg 已提交
2940 2941 2942 2943 2944
		IWL_ERR(mvm, "offset %d not used in fw key table.\n",
			keyconf->hw_key_idx);
		return -ENOENT;
	}

2945 2946 2947 2948 2949 2950 2951
	/* 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;

2952
	if (!mvm_sta) {
J
Johannes Berg 已提交
2953 2954 2955 2956
		IWL_DEBUG_WEP(mvm, "station non-existent, early return.\n");
		return 0;
	}

2957 2958
	sta_id = mvm_sta->sta_id;

2959 2960 2961 2962 2963 2964 2965 2966 2967 2968
	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;
J
Johannes Berg 已提交
2969 2970 2971 2972 2973 2974 2975 2976
}

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
2977
	struct iwl_mvm_sta *mvm_sta;
2978
	bool mcast = !(keyconf->flags & IEEE80211_KEY_FLAG_PAIRWISE);
J
Johannes Berg 已提交
2979

B
Beni Lev 已提交
2980 2981
	rcu_read_lock();

2982 2983
	mvm_sta = iwl_mvm_get_key_sta(mvm, vif, sta);
	if (WARN_ON_ONCE(!mvm_sta))
2984
		goto unlock;
2985
	iwl_mvm_send_sta_key(mvm, mvm_sta, keyconf, mcast,
2986
			     iv32, phase1key, CMD_ASYNC, keyconf->hw_key_idx);
2987 2988

 unlock:
B
Beni Lev 已提交
2989
	rcu_read_unlock();
J
Johannes Berg 已提交
2990 2991
}

2992 2993
void iwl_mvm_sta_modify_ps_wake(struct iwl_mvm *mvm,
				struct ieee80211_sta *sta)
J
Johannes Berg 已提交
2994
{
2995
	struct iwl_mvm_sta *mvmsta = iwl_mvm_sta_from_mac80211(sta);
2996
	struct iwl_mvm_add_sta_cmd cmd = {
J
Johannes Berg 已提交
2997
		.add_modify = STA_MODE_MODIFY,
2998
		.sta_id = mvmsta->sta_id,
2999
		.station_flags_msk = cpu_to_le32(STA_FLG_PS),
3000
		.mac_id_n_color = cpu_to_le32(mvmsta->mac_id_n_color),
J
Johannes Berg 已提交
3001 3002 3003
	};
	int ret;

3004 3005
	ret = iwl_mvm_send_cmd_pdu(mvm, ADD_STA, CMD_ASYNC,
				   iwl_mvm_add_sta_cmd_size(mvm), &cmd);
J
Johannes Berg 已提交
3006 3007 3008 3009
	if (ret)
		IWL_ERR(mvm, "Failed to send ADD_STA command (%d)\n", ret);
}

3010 3011
void iwl_mvm_sta_modify_sleep_tx_count(struct iwl_mvm *mvm,
				       struct ieee80211_sta *sta,
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				       enum ieee80211_frame_release_type reason,
3013 3014
				       u16 cnt, u16 tids, bool more_data,
				       bool agg)
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{
3016
	struct iwl_mvm_sta *mvmsta = iwl_mvm_sta_from_mac80211(sta);
3017
	struct iwl_mvm_add_sta_cmd cmd = {
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		.add_modify = STA_MODE_MODIFY,
3019
		.sta_id = mvmsta->sta_id,
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		.modify_mask = STA_MODIFY_SLEEPING_STA_TX_COUNT,
		.sleep_tx_count = cpu_to_le16(cnt),
3022
		.mac_id_n_color = cpu_to_le32(mvmsta->mac_id_n_color),
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	};
3024 3025 3026 3027 3028 3029 3030 3031 3032 3033 3034 3035 3036 3037 3038 3039 3040 3041 3042
	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;
3043
		int sleep_tx_count;
3044 3045 3046 3047 3048 3049 3050 3051 3052 3053 3054 3055 3056 3057 3058 3059 3060 3061 3062 3063 3064 3065 3066 3067

		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;
		}
3068 3069 3070
		sleep_tx_count = cnt - remaining;
		if (reason == IEEE80211_FRAME_RELEASE_UAPSD)
			mvmsta->sleep_tx_count = sleep_tx_count;
3071 3072
		spin_unlock_bh(&mvmsta->lock);

3073
		cmd.sleep_tx_count = cpu_to_le16(sleep_tx_count);
3074 3075 3076 3077 3078 3079 3080 3081 3082 3083 3084 3085 3086 3087 3088 3089
		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);
	}
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3091 3092 3093 3094 3095
	/* 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,
3096
				   iwl_mvm_add_sta_cmd_size(mvm), &cmd);
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	if (ret)
		IWL_ERR(mvm, "Failed to send ADD_STA command (%d)\n", ret);
}
3100

3101 3102
void iwl_mvm_rx_eosp_notif(struct iwl_mvm *mvm,
			   struct iwl_rx_cmd_buffer *rxb)
3103 3104 3105 3106 3107 3108 3109
{
	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))
3110
		return;
3111 3112 3113 3114 3115 3116 3117

	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();
}
3118 3119 3120 3121 3122 3123 3124 3125 3126 3127 3128 3129 3130

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;

3131 3132
	ret = iwl_mvm_send_cmd_pdu(mvm, ADD_STA, CMD_ASYNC,
				   iwl_mvm_add_sta_cmd_size(mvm), &cmd);
3133 3134 3135
	if (ret)
		IWL_ERR(mvm, "Failed to send ADD_STA command (%d)\n", ret);
}
3136 3137 3138 3139 3140 3141 3142 3143 3144 3145 3146 3147 3148 3149 3150 3151 3152

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;

	/*
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	 * Tell mac80211 to start/stop queuing tx for this station,
	 * but don't stop queuing if there are still pending frames
3155 3156 3157 3158 3159 3160 3161 3162 3163 3164 3165 3166 3167 3168 3169 3170 3171 3172 3173 3174 3175 3176 3177 3178 3179 3180 3181 3182 3183 3184 3185 3186 3187 3188 3189
	 * 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);
	}
}
3190 3191 3192 3193 3194 3195 3196 3197 3198 3199 3200 3201 3202 3203 3204

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();
}