sta.c 91.0 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);
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	add_sta_cmd.assoc_id = cpu_to_le16(sta->aid);
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	if (sta->wme) {
		add_sta_cmd.modify_mask |= STA_MODIFY_UAPSD_ACS;

		if (sta->uapsd_queues & IEEE80211_WMM_IE_STA_QOSINFO_AC_BK)
			add_sta_cmd.uapsd_trigger_acs |= BIT(AC_BK);
		if (sta->uapsd_queues & IEEE80211_WMM_IE_STA_QOSINFO_AC_BE)
			add_sta_cmd.uapsd_trigger_acs |= BIT(AC_BE);
		if (sta->uapsd_queues & IEEE80211_WMM_IE_STA_QOSINFO_AC_VI)
			add_sta_cmd.uapsd_trigger_acs |= BIT(AC_VI);
		if (sta->uapsd_queues & IEEE80211_WMM_IE_STA_QOSINFO_AC_VO)
			add_sta_cmd.uapsd_trigger_acs |= BIT(AC_VO);
	}

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	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)
550 551 552
{
	struct iwl_scd_txq_cfg_cmd cmd = {
		.scd_queue = queue,
553
		.action = SCD_CFG_DISABLE_QUEUE,
554 555 556 557 558 559 560 561 562 563 564 565 566 567 568 569 570 571 572 573 574 575 576 577 578
	};
	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];
579
	cmd.tid = mvm->queue_info[queue].txq_tid;
580 581 582 583
	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);

584
	IWL_DEBUG_TX_QUEUES(mvm, "Redirecting TXQ #%d to FIFO #%d\n",
585 586 587 588 589 590 591 592 593 594 595 596 597 598 599 600 601 602 603 604
			    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 */
605
	iwl_trans_txq_enable_cfg(mvm->trans, queue, ssn, NULL, wdg_timeout);
606

607 608 609 610 611
	/* 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);

612 613 614 615 616 617 618 619 620 621 622 623 624 625 626 627 628 629 630 631 632 633 634 635 636 637 638 639
	/* 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;
}

640 641 642 643 644 645 646 647 648 649 650 651 652 653 654
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;
655 656 657
	bool using_inactive_queue = false;
	unsigned long disable_agg_tids = 0;
	enum iwl_mvm_agg_state queue_state;
658
	bool shared_queue = false;
659
	int ssn;
660
	unsigned long tfd_queue_mask;
661
	int ret;
662 663 664

	lockdep_assert_held(&mvm->mutex);

665 666 667 668
	spin_lock_bh(&mvmsta->lock);
	tfd_queue_mask = mvmsta->tfd_queue_msk;
	spin_unlock_bh(&mvmsta->lock);

669
	spin_lock_bh(&mvm->queue_info_lock);
670 671 672 673 674 675 676

	/*
	 * 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)) {
677 678
		queue = iwl_mvm_find_free_queue(mvm, mvmsta->sta_id,
						IWL_MVM_DQA_MIN_MGMT_QUEUE,
679 680 681 682 683 684 685 686
						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 */
	}

687 688 689 690 691
	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)) {
692
		queue = mvmsta->reserved_queue;
693
		mvm->queue_info[queue].reserved = true;
694 695 696 697
		IWL_DEBUG_TX_QUEUES(mvm, "Using reserved queue #%d\n", queue);
	}

	if (queue < 0)
698 699
		queue = iwl_mvm_find_free_queue(mvm, mvmsta->sta_id,
						IWL_MVM_DQA_MIN_DATA_QUEUE,
700
						IWL_MVM_DQA_MAX_DATA_QUEUE);
701

702 703 704 705 706 707 708 709 710 711 712 713 714 715 716
	/*
	 * 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);
	}

717 718 719 720 721 722 723 724 725
	/* 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;
		}
	}

726 727 728 729 730 731
	/*
	 * 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.
	 */
732
	if ((queue > 0) && !shared_queue)
733
		mvm->queue_info[queue].status = IWL_MVM_QUEUE_READY;
734

735
	spin_unlock_bh(&mvm->queue_info_lock);
736

737 738 739 740
	/* 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);
741
		return queue;
742
	}
743 744 745 746 747 748 749

	/*
	 * 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
	 */
750 751
	cfg.aggregate = (queue >= IWL_MVM_DQA_MIN_DATA_QUEUE ||
			 queue == IWL_MVM_DQA_BSS_CLIENT_QUEUE);
752

753 754 755 756 757 758 759
	/*
	 * 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,
760
			.action = SCD_CFG_DISABLE_QUEUE,
761
		};
762
		u8 txq_curr_ac;
763 764 765

		disable_agg_tids = iwl_mvm_remove_sta_queue_marking(mvm, queue);

766
		spin_lock_bh(&mvm->queue_info_lock);
767
		txq_curr_ac = mvm->queue_info[queue].mac80211_ac;
768
		cmd.sta_id = mvm->queue_info[queue].ra_sta_id;
769
		cmd.tx_fifo = iwl_mvm_ac_to_tx_fifo[txq_curr_ac];
770
		cmd.tid = mvm->queue_info[queue].txq_tid;
771 772
		spin_unlock_bh(&mvm->queue_info_lock);

773
		/* Disable the queue */
774 775 776
		if (disable_agg_tids)
			iwl_mvm_invalidate_sta_queue(mvm, queue,
						     disable_agg_tids, false);
777 778 779 780 781 782 783 784 785 786 787 788 789 790 791
		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;
		}
792 793 794 795

		/* 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);
796 797
	}

798 799 800 801 802 803 804 805 806 807 808 809 810 811 812 813
	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);
		}
	}
814 815 816 817 818

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

819 820 821 822 823 824 825 826 827
	/*
	 * 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);

828 829
	spin_lock_bh(&mvmsta->lock);
	mvmsta->tid_data[tid].txq_id = queue;
830
	mvmsta->tid_data[tid].is_tid_active = true;
831
	mvmsta->tfd_queue_msk |= BIT(queue);
832
	queue_state = mvmsta->tid_data[tid].state;
833 834 835 836 837

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

838 839 840 841
	if (!shared_queue) {
		ret = iwl_mvm_sta_send_to_fw(mvm, sta, true, STA_MODIFY_QUEUES);
		if (ret)
			goto out_err;
842

843 844 845 846 847 848
		/* 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;
		}
849 850 851 852 853 854
	} else {
		/* Redirect queue, if needed */
		ret = iwl_mvm_scd_queue_redirect(mvm, queue, tid, ac, ssn,
						 wdg_timeout, false);
		if (ret)
			goto out_err;
855
	}
856

857
	return 0;
858 859 860 861 862

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

	return ret;
863 864
}

865 866 867 868 869 870 871 872 873 874 875 876 877 878 879 880 881 882 883 884 885 886 887 888 889 890 891
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);
892
	if (ret) {
893 894
		IWL_ERR(mvm, "Failed to update owner of TXQ %d (ret=%d)\n",
			queue, ret);
895 896 897 898 899 900 901 902
		return;
	}

	spin_lock_bh(&mvm->queue_info_lock);
	mvm->queue_info[queue].txq_tid = tid;
	spin_unlock_bh(&mvm->queue_info_lock);
	IWL_DEBUG_TX_QUEUES(mvm, "Changed TXQ %d ownership to tid %d\n",
			    queue, tid);
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
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) {
955
		struct iwl_mvm_add_sta_cmd cmd = {0};
956 957 958 959 960 961 962 963 964 965 966 967 968 969 970 971 972 973 974 975 976 977 978 979 980 981 982

		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);
}

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 1011 1012 1013 1014 1015 1016 1017 1018 1019 1020 1021 1022 1023 1024 1025 1026 1027
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);

1028 1029
	/* Disable bottom-halves when entering TX path */
	local_bh_disable();
1030 1031
	spin_lock(&mvmsta->lock);
	skb_queue_splice_init(&tid_data->deferred_tx_frames, &deferred_tx);
1032
	mvmsta->deferred_traffic_tid_map &= ~BIT(tid);
1033 1034 1035 1036 1037 1038 1039 1040 1041 1042 1043 1044 1045 1046 1047 1048 1049 1050
	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;
1051
	int queue, sta_id, tid;
1052

1053 1054 1055
	/* Check inactivity of queues */
	iwl_mvm_inactivity_check(mvm);

1056 1057
	mutex_lock(&mvm->mutex);

1058 1059 1060
	/* Reconfigure queues requiring reconfiguation */
	for (queue = 0; queue < IWL_MAX_HW_QUEUES; queue++) {
		bool reconfig;
1061
		bool change_owner;
1062 1063 1064 1065

		spin_lock_bh(&mvm->queue_info_lock);
		reconfig = (mvm->queue_info[queue].status ==
			    IWL_MVM_QUEUE_RECONFIGURING);
1066 1067 1068 1069 1070 1071 1072 1073 1074 1075 1076 1077 1078

		/*
		 * 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);
1079 1080 1081 1082
		spin_unlock_bh(&mvm->queue_info_lock);

		if (reconfig)
			iwl_mvm_unshare_queue(mvm, queue);
1083 1084
		else if (change_owner)
			iwl_mvm_change_queue_owner(mvm, queue);
1085 1086
	}

1087 1088 1089 1090 1091 1092 1093 1094 1095 1096 1097 1098 1099 1100 1101 1102 1103 1104 1105 1106 1107
	/* 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,
1108 1109
				      struct ieee80211_sta *sta,
				      enum nl80211_iftype vif_type)
1110 1111 1112 1113
{
	struct iwl_mvm_sta *mvmsta = iwl_mvm_sta_from_mac80211(sta);
	int queue;

1114 1115 1116 1117 1118 1119
	/*
	 * 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);

1120 1121 1122
	spin_lock_bh(&mvm->queue_info_lock);

	/* Make sure we have free resources for this STA */
1123 1124
	if (vif_type == NL80211_IFTYPE_STATION && !sta->tdls &&
	    !mvm->queue_info[IWL_MVM_DQA_BSS_CLIENT_QUEUE].hw_queue_refcount &&
1125 1126
	    (mvm->queue_info[IWL_MVM_DQA_BSS_CLIENT_QUEUE].status ==
	     IWL_MVM_QUEUE_FREE))
1127 1128
		queue = IWL_MVM_DQA_BSS_CLIENT_QUEUE;
	else
1129 1130
		queue = iwl_mvm_find_free_queue(mvm, mvmsta->sta_id,
						IWL_MVM_DQA_MIN_DATA_QUEUE,
1131
						IWL_MVM_DQA_MAX_DATA_QUEUE);
1132 1133 1134 1135 1136
	if (queue < 0) {
		spin_unlock_bh(&mvm->queue_info_lock);
		IWL_ERR(mvm, "No available queues for new station\n");
		return -ENOSPC;
	}
1137
	mvm->queue_info[queue].status = IWL_MVM_QUEUE_RESERVED;
1138 1139 1140 1141 1142 1143 1144 1145 1146 1147 1148

	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;
}

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 1186 1187 1188 1189 1190 1191 1192 1193 1194 1195 1196 1197 1198 1199 1200 1201 1202 1203
/*
 * 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
1204 1205 1206 1207 1208
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);
1209
	struct iwl_mvm_sta *mvm_sta = iwl_mvm_sta_from_mac80211(sta);
1210
	struct iwl_mvm_rxq_dup_data *dup_data;
J
Johannes Berg 已提交
1211 1212 1213 1214 1215
	int i, ret, sta_id;

	lockdep_assert_held(&mvm->mutex);

	if (!test_bit(IWL_MVM_STATUS_IN_HW_RESTART, &mvm->status))
1216 1217
		sta_id = iwl_mvm_find_free_sta_id(mvm,
						  ieee80211_vif_type_p2p(vif));
J
Johannes Berg 已提交
1218 1219 1220
	else
		sta_id = mvm_sta->sta_id;

1221
	if (sta_id == IWL_MVM_STATION_COUNT)
J
Johannes Berg 已提交
1222 1223 1224 1225
		return -ENOSPC;

	spin_lock_init(&mvm_sta->lock);

1226 1227 1228 1229 1230 1231 1232
	/* 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
1233 1234 1235 1236 1237
	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;
1238 1239
	mvm_sta->tx_protection = 0;
	mvm_sta->tt_tx_protection = false;
J
Johannes Berg 已提交
1240 1241

	/* HW restart, don't assume the memory has been zeroed */
1242
	atomic_set(&mvm->pending_frames[sta_id], 0);
1243
	mvm_sta->tid_disable_agg = 0xffff; /* No aggs at first */
J
Johannes Berg 已提交
1244
	mvm_sta->tfd_queue_msk = 0;
1245

1246 1247 1248 1249 1250
	/*
	 * 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) {
1251 1252 1253
		ret = iwl_mvm_tdls_sta_init(mvm, sta);
		if (ret)
			return ret;
1254
	} else if (!iwl_mvm_is_dqa_supported(mvm)) {
1255 1256 1257 1258
		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
1259

1260
	/* for HW restart - reset everything but the sequence number */
1261
	for (i = 0; i <= IWL_MAX_TID_COUNT; i++) {
1262 1263 1264
		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;
1265 1266 1267 1268 1269 1270 1271 1272 1273 1274

		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);
1275
	}
1276
	mvm_sta->deferred_traffic_tid_map = 0;
1277
	mvm_sta->agg_tids = 0;
J
Johannes Berg 已提交
1278

1279 1280 1281 1282 1283 1284 1285 1286 1287 1288
	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;
	}

1289
	if (iwl_mvm_is_dqa_supported(mvm)) {
1290 1291
		ret = iwl_mvm_reserve_sta_stream(mvm, sta,
						 ieee80211_vif_type_p2p(vif));
1292 1293 1294 1295
		if (ret)
			goto err;
	}

1296
update_fw:
1297
	ret = iwl_mvm_sta_send_to_fw(mvm, sta, false, 0);
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Johannes Berg 已提交
1298
	if (ret)
1299
		goto err;
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Johannes Berg 已提交
1300

1301 1302 1303 1304 1305 1306 1307 1308
	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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Johannes Berg 已提交
1309 1310 1311 1312

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

	return 0;
1313 1314

err:
1315 1316
	if (!iwl_mvm_is_dqa_supported(mvm) && sta->tdls)
		iwl_mvm_tdls_sta_deinit(mvm, sta);
1317
	return ret;
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1318 1319 1320 1321 1322
}

int iwl_mvm_drain_sta(struct iwl_mvm *mvm, struct iwl_mvm_sta *mvmsta,
		      bool drain)
{
1323
	struct iwl_mvm_add_sta_cmd cmd = {};
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Johannes Berg 已提交
1324 1325 1326 1327 1328 1329 1330 1331 1332 1333 1334 1335
	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;
1336 1337
	ret = iwl_mvm_send_cmd_pdu_status(mvm, ADD_STA,
					  iwl_mvm_add_sta_cmd_size(mvm),
1338
					  &cmd, &status);
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Johannes Berg 已提交
1339 1340 1341
	if (ret)
		return ret;

1342
	switch (status & IWL_ADD_STA_STATUS_MASK) {
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1343 1344 1345 1346 1347 1348 1349 1350 1351 1352 1353 1354 1355 1356 1357 1358 1359 1360 1361 1362 1363 1364 1365 1366 1367 1368 1369 1370 1371 1372 1373 1374 1375 1376 1377 1378
	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
1379
	ret = iwl_mvm_send_cmd_pdu(mvm, REMOVE_STA, 0,
J
Johannes Berg 已提交
1380 1381 1382 1383 1384 1385 1386 1387 1388 1389 1390 1391 1392 1393 1394 1395 1396 1397 1398 1399 1400 1401 1402 1403 1404 1405 1406 1407 1408
				   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));

1409 1410 1411 1412 1413 1414 1415 1416 1417
		/*
		 * 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
1418 1419 1420 1421 1422 1423 1424 1425 1426 1427 1428 1429 1430 1431 1432 1433 1434 1435 1436 1437 1438 1439 1440 1441 1442
			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;
		}
1443
		RCU_INIT_POINTER(mvm->fw_id_to_mac_id[sta_id], NULL);
J
Johannes Berg 已提交
1444
		clear_bit(sta_id, mvm->sta_drained);
1445 1446 1447 1448

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

1449
			for_each_set_bit(i, &msk, sizeof(msk) * BITS_PER_BYTE)
1450 1451
				iwl_mvm_disable_txq(mvm, i, i,
						    IWL_MAX_TID_COUNT, 0);
1452 1453 1454 1455 1456

			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
1457 1458 1459 1460 1461
	}

	mutex_unlock(&mvm->mutex);
}

1462 1463 1464 1465 1466 1467 1468 1469 1470 1471 1472 1473 1474 1475 1476 1477 1478 1479 1480 1481
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;
	}
}

J
Johannes Berg 已提交
1482 1483 1484 1485 1486
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);
1487
	struct iwl_mvm_sta *mvm_sta = iwl_mvm_sta_from_mac80211(sta);
J
Johannes Berg 已提交
1488 1489 1490 1491
	int ret;

	lockdep_assert_held(&mvm->mutex);

1492 1493 1494
	if (iwl_mvm_has_new_rx_api(mvm))
		kfree(mvm_sta->dup_data);

1495 1496 1497
	if ((vif->type == NL80211_IFTYPE_STATION &&
	     mvmvif->ap_sta_id == mvm_sta->sta_id) ||
	    iwl_mvm_is_dqa_supported(mvm)){
1498 1499 1500
		ret = iwl_mvm_drain_sta(mvm, mvm_sta, true);
		if (ret)
			return ret;
1501
		/* flush its queues here since we are freeing mvm_sta */
1502
		ret = iwl_mvm_flush_tx_path(mvm, mvm_sta->tfd_queue_msk, 0);
1503 1504 1505 1506 1507 1508 1509
		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);
1510

1511
		/* If DQA is supported - the queues can be disabled now */
1512 1513 1514 1515 1516 1517
		if (iwl_mvm_is_dqa_supported(mvm))
			iwl_mvm_disable_sta_queues(mvm, vif, mvm_sta);

		/* If there is a TXQ still marked as reserved - free it */
		if (iwl_mvm_is_dqa_supported(mvm) &&
		    mvm_sta->reserved_queue != IEEE80211_INVAL_HW_QUEUE) {
1518 1519 1520 1521 1522 1523 1524 1525 1526 1527 1528 1529 1530 1531 1532 1533 1534 1535 1536 1537 1538 1539
			u8 reserved_txq = mvm_sta->reserved_queue;
			enum iwl_mvm_queue_status *status;

			/*
			 * If no traffic has gone through the reserved TXQ - it
			 * is still marked as IWL_MVM_QUEUE_RESERVED, and
			 * should be manually marked as free again
			 */
			spin_lock_bh(&mvm->queue_info_lock);
			status = &mvm->queue_info[reserved_txq].status;
			if (WARN((*status != IWL_MVM_QUEUE_RESERVED) &&
				 (*status != IWL_MVM_QUEUE_FREE),
				 "sta_id %d reserved txq %d status %d",
				 mvm_sta->sta_id, reserved_txq, *status)) {
				spin_unlock_bh(&mvm->queue_info_lock);
				return -EINVAL;
			}

			*status = IWL_MVM_QUEUE_FREE;
			spin_unlock_bh(&mvm->queue_info_lock);
		}

1540 1541 1542 1543 1544
		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
1545

1546 1547
			/* unassoc - go ahead - remove the AP STA now */
			mvmvif->ap_sta_id = IWL_MVM_STATION_COUNT;
1548

1549 1550 1551 1552
			/* 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
1553 1554
	}

1555 1556 1557 1558 1559 1560 1561 1562 1563
	/*
	 * 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);
	}

1564 1565 1566 1567 1568
	/*
	 * 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
1569 1570 1571 1572
	/*
	 * There are frames pending on the AC queues for this station.
	 * We need to wait until all the frames are drained...
	 */
1573
	if (atomic_read(&mvm->pending_frames[mvm_sta->sta_id])) {
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Johannes Berg 已提交
1574 1575
		rcu_assign_pointer(mvm->fw_id_to_mac_id[mvm_sta->sta_id],
				   ERR_PTR(-EBUSY));
1576
		spin_unlock_bh(&mvm_sta->lock);
1577 1578 1579 1580 1581 1582 1583 1584 1585

		/* 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);
		}

1586
		ret = iwl_mvm_drain_sta(mvm, mvm_sta, true);
J
Johannes Berg 已提交
1587
	} else {
1588
		spin_unlock_bh(&mvm_sta->lock);
1589

1590
		if (!iwl_mvm_is_dqa_supported(mvm) && sta->tdls)
1591 1592
			iwl_mvm_tdls_sta_deinit(mvm, sta);

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Johannes Berg 已提交
1593
		ret = iwl_mvm_rm_sta_common(mvm, mvm_sta->sta_id);
1594
		RCU_INIT_POINTER(mvm->fw_id_to_mac_id[mvm_sta->sta_id], NULL);
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1595 1596 1597 1598 1599 1600 1601 1602 1603 1604 1605 1606 1607
	}

	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);

1608
	RCU_INIT_POINTER(mvm->fw_id_to_mac_id[sta_id], NULL);
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1609 1610 1611
	return ret;
}

1612 1613 1614
int iwl_mvm_allocate_int_sta(struct iwl_mvm *mvm,
			     struct iwl_mvm_int_sta *sta,
			     u32 qmask, enum nl80211_iftype iftype)
J
Johannes Berg 已提交
1615 1616
{
	if (!test_bit(IWL_MVM_STATUS_IN_HW_RESTART, &mvm->status)) {
1617
		sta->sta_id = iwl_mvm_find_free_sta_id(mvm, iftype);
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1618 1619 1620 1621 1622 1623 1624 1625 1626 1627 1628
		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;
}

1629 1630
static void iwl_mvm_dealloc_int_sta(struct iwl_mvm *mvm,
				    struct iwl_mvm_int_sta *sta)
J
Johannes Berg 已提交
1631
{
1632
	RCU_INIT_POINTER(mvm->fw_id_to_mac_id[sta->sta_id], NULL);
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1633 1634 1635 1636 1637 1638 1639 1640 1641
	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)
{
1642
	struct iwl_mvm_add_sta_cmd cmd;
J
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1643 1644 1645 1646 1647
	int ret;
	u32 status;

	lockdep_assert_held(&mvm->mutex);

1648
	memset(&cmd, 0, sizeof(cmd));
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1649 1650 1651 1652 1653
	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);
1654
	cmd.tid_disable_tx = cpu_to_le16(0xffff);
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1655 1656 1657 1658

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

1659 1660
	ret = iwl_mvm_send_cmd_pdu_status(mvm, ADD_STA,
					  iwl_mvm_add_sta_cmd_size(mvm),
1661
					  &cmd, &status);
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1662 1663 1664
	if (ret)
		return ret;

1665
	switch (status & IWL_ADD_STA_STATUS_MASK) {
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1666 1667 1668 1669 1670 1671 1672 1673 1674 1675 1676 1677 1678 1679
	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)
{
1680 1681 1682
	unsigned int wdg_timeout = iwlmvm_mod_params.tfd_q_hang_detect ?
					mvm->cfg->base_params->wd_timeout :
					IWL_WATCHDOG_DISABLED;
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1683 1684 1685 1686
	int ret;

	lockdep_assert_held(&mvm->mutex);

A
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1687
	/* Map Aux queue to fifo - needs to happen before adding Aux station */
1688 1689 1690
	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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Ariej Marjieh 已提交
1691 1692 1693

	/* Allocate aux station and assign to it the aux queue */
	ret = iwl_mvm_allocate_int_sta(mvm, &mvm->aux_sta, BIT(mvm->aux_queue),
1694
				       NL80211_IFTYPE_UNSPECIFIED);
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1695 1696 1697
	if (ret)
		return ret;

1698 1699 1700 1701 1702 1703 1704 1705 1706 1707 1708 1709 1710
	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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1711 1712 1713 1714 1715 1716 1717 1718
	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;
}

1719 1720 1721 1722 1723 1724 1725 1726 1727 1728 1729 1730 1731 1732 1733 1734 1735 1736 1737 1738 1739 1740 1741 1742 1743 1744 1745
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);
}

1746 1747 1748 1749 1750 1751 1752
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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1753 1754 1755 1756 1757 1758 1759 1760
/*
 * 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.
 */
1761
int iwl_mvm_send_add_bcast_sta(struct iwl_mvm *mvm, struct ieee80211_vif *vif)
J
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1762 1763
{
	struct iwl_mvm_vif *mvmvif = iwl_mvm_vif_from_mac80211(vif);
1764
	struct iwl_mvm_int_sta *bsta = &mvmvif->bcast_sta;
J
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1765
	static const u8 _baddr[] = {0xFF, 0xFF, 0xFF, 0xFF, 0xFF, 0xFF};
1766
	const u8 *baddr = _baddr;
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1767 1768 1769

	lockdep_assert_held(&mvm->mutex);

1770 1771 1772 1773 1774 1775 1776 1777 1778 1779 1780 1781 1782 1783 1784 1785
	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;
1786 1787 1788 1789
		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;
1790 1791 1792 1793 1794 1795 1796
		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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1797 1798 1799
	if (vif->type == NL80211_IFTYPE_ADHOC)
		baddr = vif->bss_conf.bssid;

J
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1800 1801 1802 1803 1804 1805 1806 1807 1808
	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. */
1809
int iwl_mvm_send_rm_bcast_sta(struct iwl_mvm *mvm, struct ieee80211_vif *vif)
J
Johannes Berg 已提交
1810
{
1811
	struct iwl_mvm_vif *mvmvif = iwl_mvm_vif_from_mac80211(vif);
J
Johannes Berg 已提交
1812 1813 1814 1815
	int ret;

	lockdep_assert_held(&mvm->mutex);

1816
	ret = iwl_mvm_rm_sta_common(mvm, mvmvif->bcast_sta.sta_id);
J
Johannes Berg 已提交
1817 1818 1819 1820 1821
	if (ret)
		IWL_WARN(mvm, "Failed sending remove station\n");
	return ret;
}

1822 1823 1824
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);
1825
	u32 qmask = 0;
1826 1827 1828

	lockdep_assert_held(&mvm->mutex);

1829 1830
	if (!iwl_mvm_is_dqa_supported(mvm))
		qmask = iwl_mvm_mac_get_queues_mask(vif);
1831

1832 1833 1834 1835 1836 1837
	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.
		 */
1838 1839
		qmask &= ~BIT(vif->cab_queue);

1840 1841
		if (iwl_mvm_is_dqa_supported(mvm))
			qmask |= BIT(IWL_MVM_DQA_AP_PROBE_RESP_QUEUE);
1842 1843 1844
	} else if (iwl_mvm_is_dqa_supported(mvm) &&
		   vif->type == NL80211_IFTYPE_P2P_DEVICE) {
		qmask |= BIT(IWL_MVM_DQA_P2P_DEVICE_QUEUE);
1845 1846
	}

1847 1848 1849 1850
	return iwl_mvm_allocate_int_sta(mvm, &mvmvif->bcast_sta, qmask,
					ieee80211_vif_type_p2p(vif));
}

J
Johannes Berg 已提交
1851 1852 1853 1854 1855 1856 1857
/* 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. */
1858
int iwl_mvm_add_bcast_sta(struct iwl_mvm *mvm, struct ieee80211_vif *vif)
J
Johannes Berg 已提交
1859 1860
{
	struct iwl_mvm_vif *mvmvif = iwl_mvm_vif_from_mac80211(vif);
1861
	struct iwl_mvm_int_sta *bsta = &mvmvif->bcast_sta;
J
Johannes Berg 已提交
1862 1863 1864 1865
	int ret;

	lockdep_assert_held(&mvm->mutex);

1866
	ret = iwl_mvm_alloc_bcast_sta(mvm, vif);
J
Johannes Berg 已提交
1867 1868 1869
	if (ret)
		return ret;

1870
	ret = iwl_mvm_send_add_bcast_sta(mvm, vif);
J
Johannes Berg 已提交
1871 1872 1873

	if (ret)
		iwl_mvm_dealloc_int_sta(mvm, bsta);
1874

J
Johannes Berg 已提交
1875 1876 1877
	return ret;
}

1878 1879 1880 1881 1882 1883 1884
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
1885 1886 1887 1888
/*
 * 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.
 */
1889
int iwl_mvm_rm_bcast_sta(struct iwl_mvm *mvm, struct ieee80211_vif *vif)
J
Johannes Berg 已提交
1890 1891 1892 1893 1894
{
	int ret;

	lockdep_assert_held(&mvm->mutex);

1895 1896 1897
	ret = iwl_mvm_send_rm_bcast_sta(mvm, vif);

	iwl_mvm_dealloc_bcast_sta(mvm, vif);
J
Johannes Berg 已提交
1898 1899 1900 1901

	return ret;
}

1902 1903
#define IWL_MAX_RX_BA_SESSIONS 16

1904
static void iwl_mvm_sync_rxq_del_ba(struct iwl_mvm *mvm, u8 baid)
1905
{
1906 1907 1908 1909
	struct iwl_mvm_delba_notif notif = {
		.metadata.type = IWL_MVM_RXQ_NOTIF_DEL_BA,
		.metadata.sync = 1,
		.delba.baid = baid,
1910
	};
1911 1912
	iwl_mvm_sync_rx_queues_internal(mvm, (void *)&notif, sizeof(notif));
};
1913

1914 1915 1916 1917 1918 1919 1920 1921 1922 1923 1924 1925
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];

1926 1927 1928
		spin_lock_bh(&reorder_buf->lock);
		if (likely(!reorder_buf->num_stored)) {
			spin_unlock_bh(&reorder_buf->lock);
1929
			continue;
1930
		}
1931 1932 1933 1934 1935 1936 1937 1938 1939 1940

		/*
		 * 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]);
1941 1942 1943 1944 1945 1946 1947 1948 1949 1950 1951
		/*
		 * 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);
1952 1953 1954 1955 1956 1957 1958 1959 1960 1961 1962 1963 1964 1965 1966 1967 1968 1969
	}
}

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;
1970 1971 1972 1973 1974 1975 1976
		/* 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;
1977 1978 1979 1980 1981
		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]);
	}
1982 1983
}

J
Johannes Berg 已提交
1984
int iwl_mvm_sta_rx_agg(struct iwl_mvm *mvm, struct ieee80211_sta *sta,
1985
		       int tid, u16 ssn, bool start, u8 buf_size, u16 timeout)
J
Johannes Berg 已提交
1986
{
1987
	struct iwl_mvm_sta *mvm_sta = iwl_mvm_sta_from_mac80211(sta);
1988
	struct iwl_mvm_add_sta_cmd cmd = {};
1989
	struct iwl_mvm_baid_data *baid_data = NULL;
J
Johannes Berg 已提交
1990 1991 1992 1993 1994
	int ret;
	u32 status;

	lockdep_assert_held(&mvm->mutex);

1995 1996 1997 1998 1999
	if (start && mvm->rx_ba_sessions >= IWL_MAX_RX_BA_SESSIONS) {
		IWL_WARN(mvm, "Not enough RX BA SESSIONS\n");
		return -ENOSPC;
	}

2000 2001 2002 2003 2004
	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
		 */
2005 2006 2007 2008
		baid_data = kzalloc(sizeof(*baid_data) +
				    mvm->trans->num_rx_queues *
				    sizeof(baid_data->reorder_buf[0]),
				    GFP_KERNEL);
2009 2010 2011 2012
		if (!baid_data)
			return -ENOMEM;
	}

J
Johannes Berg 已提交
2013 2014 2015
	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;
2016 2017 2018
	if (start) {
		cmd.add_immediate_ba_tid = (u8) tid;
		cmd.add_immediate_ba_ssn = cpu_to_le16(ssn);
2019
		cmd.rx_ba_window = cpu_to_le16((u16)buf_size);
2020 2021 2022
	} else {
		cmd.remove_immediate_ba_tid = (u8) tid;
	}
J
Johannes Berg 已提交
2023 2024 2025 2026
	cmd.modify_mask = start ? STA_MODIFY_ADD_BA_TID :
				  STA_MODIFY_REMOVE_BA_TID;

	status = ADD_STA_SUCCESS;
2027 2028
	ret = iwl_mvm_send_cmd_pdu_status(mvm, ADD_STA,
					  iwl_mvm_add_sta_cmd_size(mvm),
2029
					  &cmd, &status);
J
Johannes Berg 已提交
2030
	if (ret)
2031
		goto out_free;
J
Johannes Berg 已提交
2032

2033
	switch (status & IWL_ADD_STA_STATUS_MASK) {
J
Johannes Berg 已提交
2034
	case ADD_STA_SUCCESS:
2035 2036
		IWL_DEBUG_HT(mvm, "RX BA Session %sed in fw\n",
			     start ? "start" : "stopp");
J
Johannes Berg 已提交
2037 2038 2039 2040 2041 2042 2043 2044 2045 2046 2047 2048
		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;
	}

2049 2050 2051 2052 2053 2054 2055 2056 2057 2058 2059 2060 2061 2062 2063 2064 2065 2066 2067 2068
	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;
2069 2070 2071
		setup_timer(&baid_data->session_timer,
			    iwl_mvm_rx_agg_session_expired,
			    (unsigned long)&mvm->baid_map[baid]);
2072 2073 2074 2075 2076 2077 2078 2079 2080
		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));

2081 2082
		iwl_mvm_init_reorder_buffer(mvm, mvm_sta->sta_id,
					    baid_data, ssn, buf_size);
2083 2084 2085 2086 2087 2088
		/*
		 * 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
		 */
2089 2090
		IWL_DEBUG_HT(mvm, "Sta %d(%d) is assigned to BAID %d\n",
			     mvm_sta->sta_id, tid, baid);
2091 2092
		WARN_ON(rcu_access_pointer(mvm->baid_map[baid]));
		rcu_assign_pointer(mvm->baid_map[baid], baid_data);
2093
	} else  {
2094 2095
		u8 baid = mvm_sta->tid_to_baid[tid];

2096 2097 2098
		if (mvm->rx_ba_sessions > 0)
			/* check that restart flow didn't zero the counter */
			mvm->rx_ba_sessions--;
2099 2100 2101 2102 2103 2104 2105 2106 2107 2108 2109
		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 */
2110
		iwl_mvm_free_reorder(mvm, baid_data);
2111 2112 2113
		del_timer_sync(&baid_data->session_timer);
		RCU_INIT_POINTER(mvm->baid_map[baid], NULL);
		kfree_rcu(baid_data, rcu_head);
2114
		IWL_DEBUG_HT(mvm, "BAID %d is free\n", baid);
2115
	}
2116
	return 0;
2117

2118 2119
out_free:
	kfree(baid_data);
J
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2120 2121 2122
	return ret;
}

2123 2124
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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2125
{
2126
	struct iwl_mvm_sta *mvm_sta = iwl_mvm_sta_from_mac80211(sta);
2127
	struct iwl_mvm_add_sta_cmd cmd = {};
J
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2128 2129 2130 2131 2132 2133 2134 2135 2136
	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 {
2137 2138 2139
		/* 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);
J
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2140 2141 2142 2143 2144 2145 2146 2147 2148 2149 2150
		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;
2151 2152
	ret = iwl_mvm_send_cmd_pdu_status(mvm, ADD_STA,
					  iwl_mvm_add_sta_cmd_size(mvm),
2153
					  &cmd, &status);
J
Johannes Berg 已提交
2154 2155 2156
	if (ret)
		return ret;

2157
	switch (status & IWL_ADD_STA_STATUS_MASK) {
J
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2158 2159 2160 2161 2162 2163 2164 2165 2166 2167 2168 2169
	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;
}

2170
const u8 tid_to_mac80211_ac[] = {
J
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2171 2172 2173 2174 2175 2176 2177 2178
	IEEE80211_AC_BE,
	IEEE80211_AC_BK,
	IEEE80211_AC_BK,
	IEEE80211_AC_BE,
	IEEE80211_AC_VI,
	IEEE80211_AC_VI,
	IEEE80211_AC_VO,
	IEEE80211_AC_VO,
2179
	IEEE80211_AC_VO, /* We treat MGMT as TID 8, which is set as AC_VO */
J
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2180 2181
};

2182 2183 2184 2185 2186 2187 2188 2189 2190 2191 2192
static const u8 tid_to_ucode_ac[] = {
	AC_BE,
	AC_BK,
	AC_BK,
	AC_BE,
	AC_VI,
	AC_VI,
	AC_VO,
	AC_VO,
};

J
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2193 2194 2195
int iwl_mvm_sta_tx_agg_start(struct iwl_mvm *mvm, struct ieee80211_vif *vif,
			     struct ieee80211_sta *sta, u16 tid, u16 *ssn)
{
2196
	struct iwl_mvm_sta *mvmsta = iwl_mvm_sta_from_mac80211(sta);
J
Johannes Berg 已提交
2197 2198
	struct iwl_mvm_tid_data *tid_data;
	int txq_id;
2199
	int ret;
J
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2200 2201 2202 2203 2204 2205 2206 2207 2208 2209 2210 2211

	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);

2212 2213 2214 2215 2216 2217 2218 2219 2220
	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;
	}

2221
	spin_lock(&mvm->queue_info_lock);
2222

2223 2224 2225 2226 2227 2228 2229 2230 2231
	/*
	 * 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;
2232 2233 2234 2235 2236 2237 2238 2239
	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) ||
2240
	    mvm->queue_info[txq_id].status != IWL_MVM_QUEUE_READY) {
2241 2242
		txq_id = iwl_mvm_find_free_queue(mvm, mvmsta->sta_id,
						 mvm->first_agg_queue,
2243 2244 2245 2246 2247 2248 2249 2250 2251
						 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;
2252
	}
2253 2254

	spin_unlock(&mvm->queue_info_lock);
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Johannes Berg 已提交
2255

2256 2257 2258 2259
	IWL_DEBUG_TX_QUEUES(mvm,
			    "AGG for tid %d will be on queue #%d\n",
			    tid, txq_id);

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2260
	tid_data = &mvmsta->tid_data[tid];
2261
	tid_data->ssn = IEEE80211_SEQ_TO_SN(tid_data->seq_number);
J
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2262 2263 2264 2265 2266 2267 2268 2269 2270 2271 2272 2273 2274 2275 2276
	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;
	}

2277
	ret = 0;
2278
	goto out;
2279 2280

release_locks:
2281 2282
	spin_unlock(&mvm->queue_info_lock);
out:
J
Johannes Berg 已提交
2283 2284
	spin_unlock_bh(&mvmsta->lock);

2285
	return ret;
J
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2286 2287 2288
}

int iwl_mvm_sta_tx_agg_oper(struct iwl_mvm *mvm, struct ieee80211_vif *vif,
2289 2290
			    struct ieee80211_sta *sta, u16 tid, u8 buf_size,
			    bool amsdu)
J
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2291
{
2292
	struct iwl_mvm_sta *mvmsta = iwl_mvm_sta_from_mac80211(sta);
J
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2293
	struct iwl_mvm_tid_data *tid_data = &mvmsta->tid_data[tid];
2294 2295
	unsigned int wdg_timeout =
		iwl_mvm_get_wd_timeout(mvm, vif, sta->tdls, false);
2296
	int queue, ret;
2297
	bool alloc_queue = true;
2298
	enum iwl_mvm_queue_status queue_status;
J
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2299 2300
	u16 ssn;

2301 2302 2303 2304 2305 2306 2307
	struct iwl_trans_txq_scd_cfg cfg = {
		.sta_id = mvmsta->sta_id,
		.tid = tid,
		.frame_limit = buf_size,
		.aggregate = true,
	};

2308 2309 2310
	BUILD_BUG_ON((sizeof(mvmsta->agg_tids) * BITS_PER_BYTE)
		     != IWL_MAX_TID_COUNT);

J
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2311 2312 2313 2314 2315 2316
	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;
2317
	mvmsta->agg_tids |= BIT(tid);
J
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2318
	tid_data->ssn = 0xffff;
2319
	tid_data->amsdu_in_ampdu_allowed = amsdu;
J
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2320 2321
	spin_unlock_bh(&mvmsta->lock);

2322
	cfg.fifo = iwl_mvm_ac_to_tx_fifo[tid_to_mac80211_ac[tid]];
J
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2323

2324 2325 2326 2327
	spin_lock_bh(&mvm->queue_info_lock);
	queue_status = mvm->queue_info[queue].status;
	spin_unlock_bh(&mvm->queue_info_lock);

2328 2329 2330 2331 2332 2333 2334 2335 2336 2337 2338 2339 2340 2341 2342 2343 2344 2345 2346 2347 2348 2349 2350 2351 2352 2353 2354 2355 2356 2357 2358 2359 2360 2361 2362 2363 2364 2365
	/* 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);
2366

2367 2368 2369 2370 2371 2372
	/* 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
2373

2374 2375
	/* No need to mark as reserved */
	spin_lock_bh(&mvm->queue_info_lock);
2376
	mvm->queue_info[queue].status = IWL_MVM_QUEUE_READY;
2377 2378
	spin_unlock_bh(&mvm->queue_info_lock);

J
Johannes Berg 已提交
2379 2380 2381 2382 2383 2384 2385 2386 2387 2388 2389
	/*
	 * 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;

2390 2391 2392
	IWL_DEBUG_HT(mvm, "Tx aggregation enabled on ra = %pM tid = %d\n",
		     sta->addr, tid);

2393
	return iwl_mvm_send_lq_cmd(mvm, &mvmsta->lq_sta.lq, false);
J
Johannes Berg 已提交
2394 2395 2396 2397 2398
}

int iwl_mvm_sta_tx_agg_stop(struct iwl_mvm *mvm, struct ieee80211_vif *vif,
			    struct ieee80211_sta *sta, u16 tid)
{
2399
	struct iwl_mvm_sta *mvmsta = iwl_mvm_sta_from_mac80211(sta);
J
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2400 2401 2402 2403
	struct iwl_mvm_tid_data *tid_data = &mvmsta->tid_data[tid];
	u16 txq_id;
	int err;

2404 2405 2406 2407 2408 2409 2410 2411 2412
	/*
	 * 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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2413 2414 2415 2416 2417 2418 2419
	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);

2420 2421
	mvmsta->agg_tids &= ~BIT(tid);

2422
	spin_lock_bh(&mvm->queue_info_lock);
2423 2424 2425 2426 2427 2428 2429 2430 2431
	/*
	 * 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;
2432

2433 2434
	spin_unlock_bh(&mvm->queue_info_lock);

J
Johannes Berg 已提交
2435 2436
	switch (tid_data->state) {
	case IWL_AGG_ON:
2437
		tid_data->ssn = IEEE80211_SEQ_TO_SN(tid_data->seq_number);
J
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2438 2439 2440 2441 2442 2443 2444 2445 2446 2447 2448 2449 2450

		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;
2451 2452 2453 2454 2455 2456 2457
		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);

2458 2459 2460 2461 2462
		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);
		}
2463
		return 0;
J
Johannes Berg 已提交
2464 2465 2466 2467 2468 2469 2470 2471 2472 2473 2474 2475 2476 2477 2478 2479 2480 2481 2482 2483 2484 2485 2486 2487 2488 2489 2490 2491
	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;
}

2492 2493 2494
int iwl_mvm_sta_tx_agg_flush(struct iwl_mvm *mvm, struct ieee80211_vif *vif,
			    struct ieee80211_sta *sta, u16 tid)
{
2495
	struct iwl_mvm_sta *mvmsta = iwl_mvm_sta_from_mac80211(sta);
2496 2497
	struct iwl_mvm_tid_data *tid_data = &mvmsta->tid_data[tid];
	u16 txq_id;
2498
	enum iwl_mvm_agg_state old_state;
2499 2500 2501 2502 2503 2504 2505 2506 2507

	/*
	 * 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);
2508
	old_state = tid_data->state;
2509
	tid_data->state = IWL_AGG_OFF;
2510
	mvmsta->agg_tids &= ~BIT(tid);
2511 2512
	spin_unlock_bh(&mvmsta->lock);

2513
	spin_lock_bh(&mvm->queue_info_lock);
2514 2515 2516 2517 2518 2519 2520 2521 2522
	/*
	 * 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;
2523 2524
	spin_unlock_bh(&mvm->queue_info_lock);

2525
	if (old_state >= IWL_AGG_ON) {
2526
		iwl_mvm_drain_sta(mvm, mvmsta, true);
2527
		if (iwl_mvm_flush_tx_path(mvm, BIT(txq_id), 0))
2528
			IWL_ERR(mvm, "Couldn't flush the AGG queue\n");
2529 2530 2531
		iwl_trans_wait_tx_queue_empty(mvm->trans,
					      mvmsta->tfd_queue_msk);
		iwl_mvm_drain_sta(mvm, mvmsta, false);
2532

2533 2534
		iwl_mvm_sta_tx_agg(mvm, sta, tid, txq_id, false);

2535 2536 2537 2538 2539 2540
		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);
		}
2541
	}
2542 2543 2544 2545

	return 0;
}

J
Johannes Berg 已提交
2546 2547
static int iwl_mvm_set_fw_key_idx(struct iwl_mvm *mvm)
{
2548
	int i, max = -1, max_offs = -1;
J
Johannes Berg 已提交
2549 2550 2551

	lockdep_assert_held(&mvm->mutex);

2552 2553 2554 2555 2556 2557 2558 2559 2560 2561 2562 2563 2564 2565
	/* 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
2566

2567
	if (max_offs < 0)
J
Johannes Berg 已提交
2568 2569
		return STA_KEY_IDX_INVALID;

2570
	return max_offs;
J
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2571 2572
}

2573 2574 2575
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
2576
{
2577
	struct iwl_mvm_vif *mvmvif = iwl_mvm_vif_from_mac80211(vif);
J
Johannes Berg 已提交
2578

2579 2580
	if (sta)
		return iwl_mvm_sta_from_mac80211(sta);
J
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2581 2582 2583 2584 2585 2586 2587

	/*
	 * 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 &&
2588 2589 2590
	    mvmvif->ap_sta_id != IWL_MVM_STATION_COUNT) {
		u8 sta_id = mvmvif->ap_sta_id;

2591 2592 2593
		sta = rcu_dereference_check(mvm->fw_id_to_mac_id[sta_id],
					    lockdep_is_held(&mvm->mutex));

2594 2595 2596 2597 2598
		/*
		 * 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.
		 */
2599 2600 2601 2602
		if (IS_ERR_OR_NULL(sta))
			return NULL;

		return iwl_mvm_sta_from_mac80211(sta);
2603
	}
J
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2604

2605
	return NULL;
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2606 2607 2608 2609
}

static int iwl_mvm_send_sta_key(struct iwl_mvm *mvm,
				struct iwl_mvm_sta *mvm_sta,
2610
				struct ieee80211_key_conf *keyconf, bool mcast,
2611 2612
				u32 tkip_iv32, u16 *tkip_p1k, u32 cmd_flags,
				u8 key_offset)
J
Johannes Berg 已提交
2613
{
2614
	struct iwl_mvm_add_sta_key_cmd cmd = {};
2615
	__le16 key_flags;
2616 2617
	int ret;
	u32 status;
J
Johannes Berg 已提交
2618 2619
	u16 keyidx;
	int i;
2620
	u8 sta_id = mvm_sta->sta_id;
J
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2621 2622 2623 2624 2625 2626 2627 2628 2629

	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);
2630
		cmd.tkip_rx_tsc_byte2 = tkip_iv32;
J
Johannes Berg 已提交
2631
		for (i = 0; i < 5; i++)
2632 2633
			cmd.tkip_rx_ttak[i] = cpu_to_le16(tkip_p1k[i]);
		memcpy(cmd.key, keyconf->key, keyconf->keylen);
J
Johannes Berg 已提交
2634 2635 2636
		break;
	case WLAN_CIPHER_SUITE_CCMP:
		key_flags |= cpu_to_le16(STA_KEY_FLG_CCM);
2637
		memcpy(cmd.key, keyconf->key, keyconf->keylen);
J
Johannes Berg 已提交
2638
		break;
2639 2640
	case WLAN_CIPHER_SUITE_WEP104:
		key_flags |= cpu_to_le16(STA_KEY_FLG_WEP_13BYTES);
2641
		/* fall through */
2642 2643 2644 2645
	case WLAN_CIPHER_SUITE_WEP40:
		key_flags |= cpu_to_le16(STA_KEY_FLG_WEP);
		memcpy(cmd.key + 3, keyconf->key, keyconf->keylen);
		break;
2646 2647 2648 2649 2650 2651 2652
	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
2653
	default:
2654 2655
		key_flags |= cpu_to_le16(STA_KEY_FLG_EXT);
		memcpy(cmd.key, keyconf->key, keyconf->keylen);
J
Johannes Berg 已提交
2656 2657
	}

2658
	if (mcast)
J
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2659 2660
		key_flags |= cpu_to_le16(STA_KEY_MULTICAST);

2661
	cmd.key_offset = key_offset;
2662
	cmd.key_flags = key_flags;
J
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2663 2664 2665
	cmd.sta_id = sta_id;

	status = ADD_STA_SUCCESS;
E
Emmanuel Grumbach 已提交
2666
	if (cmd_flags & CMD_ASYNC)
2667 2668
		ret =  iwl_mvm_send_cmd_pdu(mvm, ADD_STA_KEY, CMD_ASYNC,
					    sizeof(cmd), &cmd);
E
Emmanuel Grumbach 已提交
2669 2670 2671
	else
		ret = iwl_mvm_send_cmd_pdu_status(mvm, ADD_STA_KEY, sizeof(cmd),
						  &cmd, &status);
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2672 2673 2674 2675 2676 2677 2678 2679 2680 2681 2682 2683 2684 2685 2686 2687 2688 2689 2690 2691 2692

	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 */
2693 2694 2695 2696 2697 2698 2699 2700 2701
	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
2702 2703 2704 2705 2706 2707 2708 2709 2710 2711 2712
		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;

2713 2714 2715 2716
		switch (keyconf->cipher) {
		case WLAN_CIPHER_SUITE_AES_CMAC:
			igtk_cmd.ctrl_flags |= cpu_to_le32(STA_KEY_FLG_CCM);
			break;
2717 2718 2719 2720
		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;
2721 2722 2723 2724
		default:
			return -EINVAL;
		}

2725 2726 2727 2728
		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
2729 2730 2731 2732 2733 2734 2735 2736 2737 2738 2739 2740 2741 2742
		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);

2743 2744 2745 2746 2747 2748 2749 2750 2751 2752 2753 2754 2755
	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
2756
	return iwl_mvm_send_cmd_pdu(mvm, MGMT_MCAST_KEY, 0,
J
Johannes Berg 已提交
2757 2758 2759 2760 2761 2762 2763 2764
				    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)
{
2765
	struct iwl_mvm_vif *mvmvif = iwl_mvm_vif_from_mac80211(vif);
J
Johannes Berg 已提交
2766 2767 2768 2769 2770 2771 2772 2773 2774 2775 2776 2777 2778 2779 2780 2781

	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;
}

2782 2783 2784
static int __iwl_mvm_set_sta_key(struct iwl_mvm *mvm,
				 struct ieee80211_vif *vif,
				 struct ieee80211_sta *sta,
2785
				 struct ieee80211_key_conf *keyconf,
2786
				 u8 key_offset,
2787
				 bool mcast)
2788 2789 2790 2791 2792 2793 2794 2795 2796 2797 2798 2799 2800
{
	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);
2801
		ret = iwl_mvm_send_sta_key(mvm, mvm_sta, keyconf, mcast,
2802
					   seq.tkip.iv32, p1k, 0, key_offset);
2803 2804
		break;
	case WLAN_CIPHER_SUITE_CCMP:
2805 2806
	case WLAN_CIPHER_SUITE_WEP40:
	case WLAN_CIPHER_SUITE_WEP104:
2807 2808
	case WLAN_CIPHER_SUITE_GCMP:
	case WLAN_CIPHER_SUITE_GCMP_256:
2809
		ret = iwl_mvm_send_sta_key(mvm, mvm_sta, keyconf, mcast,
2810
					   0, NULL, 0, key_offset);
2811 2812
		break;
	default:
2813
		ret = iwl_mvm_send_sta_key(mvm, mvm_sta, keyconf, mcast,
2814
					   0, NULL, 0, key_offset);
2815 2816 2817 2818 2819 2820
	}

	return ret;
}

static int __iwl_mvm_remove_sta_key(struct iwl_mvm *mvm, u8 sta_id,
2821 2822
				    struct ieee80211_key_conf *keyconf,
				    bool mcast)
2823 2824 2825 2826 2827 2828 2829 2830 2831 2832 2833
{
	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);

2834
	if (mcast)
2835 2836 2837 2838 2839 2840 2841 2842 2843 2844 2845 2846 2847 2848 2849 2850 2851 2852 2853 2854 2855 2856 2857
		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
2858 2859 2860 2861
int iwl_mvm_set_sta_key(struct iwl_mvm *mvm,
			struct ieee80211_vif *vif,
			struct ieee80211_sta *sta,
			struct ieee80211_key_conf *keyconf,
2862
			u8 key_offset)
J
Johannes Berg 已提交
2863
{
2864
	bool mcast = !(keyconf->flags & IEEE80211_KEY_FLAG_PAIRWISE);
2865
	struct iwl_mvm_sta *mvm_sta;
2866
	u8 sta_id;
J
Johannes Berg 已提交
2867
	int ret;
2868
	static const u8 __maybe_unused zero_addr[ETH_ALEN] = {0};
J
Johannes Berg 已提交
2869 2870 2871 2872

	lockdep_assert_held(&mvm->mutex);

	/* Get the station id from the mvm local station table */
2873 2874 2875
	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
2876 2877
		return -EINVAL;
	}
2878
	sta_id = mvm_sta->sta_id;
J
Johannes Berg 已提交
2879

2880 2881 2882
	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
2883 2884 2885 2886 2887 2888 2889 2890 2891 2892 2893 2894 2895 2896 2897 2898 2899
		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;
		}
	}

2900
	if (WARN_ON_ONCE(iwl_mvm_sta_from_mac80211(sta)->vif != vif))
J
Johannes Berg 已提交
2901 2902
		return -EINVAL;

2903 2904 2905 2906 2907 2908 2909 2910 2911 2912 2913 2914 2915 2916
	/* 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
2917
			return -ENOSPC;
2918
		keyconf->hw_key_idx = key_offset;
J
Johannes Berg 已提交
2919 2920
	}

2921
	ret = __iwl_mvm_set_sta_key(mvm, vif, sta, keyconf, key_offset, mcast);
2922
	if (ret)
2923 2924 2925 2926 2927 2928 2929 2930 2931 2932
		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) {
2933 2934
		ret = __iwl_mvm_set_sta_key(mvm, vif, sta, keyconf,
					    key_offset, !mcast);
2935 2936
		if (ret) {
			__iwl_mvm_remove_sta_key(mvm, sta_id, keyconf, mcast);
2937
			goto end;
2938 2939
		}
	}
J
Johannes Berg 已提交
2940

2941 2942
	__set_bit(key_offset, mvm->fw_key_table);

J
Johannes Berg 已提交
2943 2944 2945
end:
	IWL_DEBUG_WEP(mvm, "key: cipher=%x len=%d idx=%d sta=%pM ret=%d\n",
		      keyconf->cipher, keyconf->keylen, keyconf->keyidx,
2946
		      sta ? sta->addr : zero_addr, ret);
J
Johannes Berg 已提交
2947 2948 2949 2950 2951 2952 2953 2954
	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)
{
2955
	bool mcast = !(keyconf->flags & IEEE80211_KEY_FLAG_PAIRWISE);
2956 2957
	struct iwl_mvm_sta *mvm_sta;
	u8 sta_id = IWL_MVM_STATION_COUNT;
2958
	int ret, i;
J
Johannes Berg 已提交
2959 2960 2961

	lockdep_assert_held(&mvm->mutex);

2962 2963
	/* 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
2964 2965 2966 2967

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

2968 2969 2970
	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
2971 2972
		return iwl_mvm_send_sta_igtk(mvm, keyconf, sta_id, true);

2973
	if (!__test_and_clear_bit(keyconf->hw_key_idx, mvm->fw_key_table)) {
J
Johannes Berg 已提交
2974 2975 2976 2977 2978
		IWL_ERR(mvm, "offset %d not used in fw key table.\n",
			keyconf->hw_key_idx);
		return -ENOENT;
	}

2979 2980 2981 2982 2983 2984 2985
	/* 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;

2986
	if (!mvm_sta) {
J
Johannes Berg 已提交
2987 2988 2989 2990
		IWL_DEBUG_WEP(mvm, "station non-existent, early return.\n");
		return 0;
	}

2991 2992
	sta_id = mvm_sta->sta_id;

2993 2994 2995 2996 2997 2998 2999 3000 3001 3002
	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
3003 3004 3005 3006 3007 3008 3009 3010
}

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
3011
	struct iwl_mvm_sta *mvm_sta;
3012
	bool mcast = !(keyconf->flags & IEEE80211_KEY_FLAG_PAIRWISE);
J
Johannes Berg 已提交
3013

B
Beni Lev 已提交
3014 3015
	rcu_read_lock();

3016 3017
	mvm_sta = iwl_mvm_get_key_sta(mvm, vif, sta);
	if (WARN_ON_ONCE(!mvm_sta))
3018
		goto unlock;
3019
	iwl_mvm_send_sta_key(mvm, mvm_sta, keyconf, mcast,
3020
			     iv32, phase1key, CMD_ASYNC, keyconf->hw_key_idx);
3021 3022

 unlock:
B
Beni Lev 已提交
3023
	rcu_read_unlock();
J
Johannes Berg 已提交
3024 3025
}

3026 3027
void iwl_mvm_sta_modify_ps_wake(struct iwl_mvm *mvm,
				struct ieee80211_sta *sta)
J
Johannes Berg 已提交
3028
{
3029
	struct iwl_mvm_sta *mvmsta = iwl_mvm_sta_from_mac80211(sta);
3030
	struct iwl_mvm_add_sta_cmd cmd = {
J
Johannes Berg 已提交
3031
		.add_modify = STA_MODE_MODIFY,
3032
		.sta_id = mvmsta->sta_id,
3033
		.station_flags_msk = cpu_to_le32(STA_FLG_PS),
3034
		.mac_id_n_color = cpu_to_le32(mvmsta->mac_id_n_color),
J
Johannes Berg 已提交
3035 3036 3037
	};
	int ret;

3038 3039
	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
3040 3041 3042 3043
	if (ret)
		IWL_ERR(mvm, "Failed to send ADD_STA command (%d)\n", ret);
}

3044 3045
void iwl_mvm_sta_modify_sleep_tx_count(struct iwl_mvm *mvm,
				       struct ieee80211_sta *sta,
J
Johannes Berg 已提交
3046
				       enum ieee80211_frame_release_type reason,
3047 3048
				       u16 cnt, u16 tids, bool more_data,
				       bool agg)
J
Johannes Berg 已提交
3049
{
3050
	struct iwl_mvm_sta *mvmsta = iwl_mvm_sta_from_mac80211(sta);
3051
	struct iwl_mvm_add_sta_cmd cmd = {
J
Johannes Berg 已提交
3052
		.add_modify = STA_MODE_MODIFY,
3053
		.sta_id = mvmsta->sta_id,
J
Johannes Berg 已提交
3054 3055
		.modify_mask = STA_MODIFY_SLEEPING_STA_TX_COUNT,
		.sleep_tx_count = cpu_to_le16(cnt),
3056
		.mac_id_n_color = cpu_to_le32(mvmsta->mac_id_n_color),
J
Johannes Berg 已提交
3057
	};
3058 3059 3060 3061 3062 3063 3064 3065 3066 3067 3068 3069 3070 3071 3072 3073 3074 3075 3076
	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;
3077
		int sleep_tx_count;
3078 3079 3080 3081 3082 3083 3084 3085 3086 3087 3088 3089 3090 3091 3092 3093 3094 3095 3096 3097 3098 3099 3100 3101

		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;
		}
3102 3103 3104
		sleep_tx_count = cnt - remaining;
		if (reason == IEEE80211_FRAME_RELEASE_UAPSD)
			mvmsta->sleep_tx_count = sleep_tx_count;
3105 3106
		spin_unlock_bh(&mvmsta->lock);

3107
		cmd.sleep_tx_count = cpu_to_le16(sleep_tx_count);
3108 3109 3110 3111 3112 3113 3114 3115 3116 3117 3118 3119 3120 3121 3122 3123
		if (WARN_ON(cnt - remaining == 0)) {
			ieee80211_sta_eosp(sta);
			return;
		}
	}

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

	if (reason == IEEE80211_FRAME_RELEASE_PSPOLL) {
		mvmsta->next_status_eosp = true;
		cmd.sleep_state_flags |= cpu_to_le16(STA_SLEEP_STATE_PS_POLL);
	} else {
		cmd.sleep_state_flags |= cpu_to_le16(STA_SLEEP_STATE_UAPSD);
	}
J
Johannes Berg 已提交
3124

3125 3126 3127 3128 3129
	/* 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,
3130
				   iwl_mvm_add_sta_cmd_size(mvm), &cmd);
J
Johannes Berg 已提交
3131 3132 3133
	if (ret)
		IWL_ERR(mvm, "Failed to send ADD_STA command (%d)\n", ret);
}
3134

3135 3136
void iwl_mvm_rx_eosp_notif(struct iwl_mvm *mvm,
			   struct iwl_rx_cmd_buffer *rxb)
3137 3138 3139 3140 3141 3142 3143
{
	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))
3144
		return;
3145 3146 3147 3148 3149 3150 3151

	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();
}
3152 3153 3154 3155 3156 3157 3158 3159 3160 3161 3162 3163 3164

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;

3165 3166
	ret = iwl_mvm_send_cmd_pdu(mvm, ADD_STA, CMD_ASYNC,
				   iwl_mvm_add_sta_cmd_size(mvm), &cmd);
3167 3168 3169
	if (ret)
		IWL_ERR(mvm, "Failed to send ADD_STA command (%d)\n", ret);
}
3170 3171 3172 3173 3174 3175 3176 3177 3178 3179 3180 3181 3182 3183 3184 3185 3186

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

	spin_lock_bh(&mvm_sta->lock);

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

	mvm_sta->disable_tx = disable;

	/*
S
Sara Sharon 已提交
3187 3188
	 * Tell mac80211 to start/stop queuing tx for this station,
	 * but don't stop queuing if there are still pending frames
3189 3190 3191 3192 3193 3194 3195 3196 3197 3198 3199 3200 3201 3202 3203 3204 3205 3206 3207 3208 3209 3210 3211 3212 3213 3214 3215 3216 3217 3218 3219 3220 3221 3222 3223
	 * 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);
	}
}
3224 3225 3226 3227 3228 3229 3230 3231 3232 3233 3234 3235 3236 3237 3238

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();
}