sta.c 85.9 KB
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/******************************************************************************
 *
 * This file is provided under a dual BSD/GPLv2 license.  When using or
 * redistributing this file, you may do so under either license.
 *
 * GPL LICENSE SUMMARY
 *
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 * Copyright(c) 2012 - 2015 Intel Corporation. All rights reserved.
 * Copyright(c) 2013 - 2015 Intel Mobile Communications GmbH
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 * Copyright(c) 2016 Intel Deutschland GmbH
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 *
 * This program is free software; you can redistribute it and/or modify
 * it under the terms of version 2 of the GNU General Public License as
 * published by the Free Software Foundation.
 *
 * This program is distributed in the hope that it will be useful, but
 * WITHOUT ANY WARRANTY; without even the implied warranty of
 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
 * General Public License for more details.
 *
 * You should have received a copy of the GNU General Public License
 * along with this program; if not, write to the Free Software
 * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110,
 * USA
 *
 * The full GNU General Public License is included in this distribution
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 * in the file called COPYING.
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 *
 * Contact Information:
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 *  Intel Linux Wireless <linuxwifi@intel.com>
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 * Intel Corporation, 5200 N.E. Elam Young Parkway, Hillsboro, OR 97124-6497
 *
 * BSD LICENSE
 *
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 * Copyright(c) 2012 - 2015 Intel Corporation. All rights reserved.
 * Copyright(c) 2013 - 2015 Intel Mobile Communications GmbH
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 * Copyright(c) 2016 Intel Deutschland GmbH
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 * All rights reserved.
 *
 * Redistribution and use in source and binary forms, with or without
 * modification, are permitted provided that the following conditions
 * are met:
 *
 *  * Redistributions of source code must retain the above copyright
 *    notice, this list of conditions and the following disclaimer.
 *  * Redistributions in binary form must reproduce the above copyright
 *    notice, this list of conditions and the following disclaimer in
 *    the documentation and/or other materials provided with the
 *    distribution.
 *  * Neither the name Intel Corporation nor the names of its
 *    contributors may be used to endorse or promote products derived
 *    from this software without specific prior written permission.
 *
 * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
 * "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
 * LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
 * A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
 * OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
 * SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
 * LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
 * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
 * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
 * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
 * OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
 *
 *****************************************************************************/
#include <net/mac80211.h>

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

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

	lockdep_assert_held(&mvm->mutex);

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

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

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

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

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

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

	switch (sta->smps_mode) {
	case IEEE80211_SMPS_AUTOMATIC:
	case IEEE80211_SMPS_NUM_MODES:
		WARN_ON(1);
		break;
	case IEEE80211_SMPS_STATIC:
		/* override NSS */
		add_sta_cmd.station_flags &= ~cpu_to_le32(STA_FLG_MIMO_EN_MSK);
		add_sta_cmd.station_flags |= cpu_to_le32(STA_FLG_MIMO_EN_SISO);
		break;
	case IEEE80211_SMPS_DYNAMIC:
		add_sta_cmd.station_flags |= cpu_to_le32(STA_FLG_RTS_MIMO_PROT);
		break;
	case IEEE80211_SMPS_OFF:
		/* nothing */
		break;
	}
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	if (sta->ht_cap.ht_supported) {
		add_sta_cmd.station_flags_msk |=
			cpu_to_le32(STA_FLG_MAX_AGG_SIZE_MSK |
				    STA_FLG_AGG_MPDU_DENS_MSK);

		mpdu_dens = sta->ht_cap.ampdu_density;
	}

	if (sta->vht_cap.vht_supported) {
		agg_size = sta->vht_cap.cap &
			IEEE80211_VHT_CAP_MAX_A_MPDU_LENGTH_EXPONENT_MASK;
		agg_size >>=
			IEEE80211_VHT_CAP_MAX_A_MPDU_LENGTH_EXPONENT_SHIFT;
	} else if (sta->ht_cap.ht_supported) {
		agg_size = sta->ht_cap.ampdu_factor;
	}

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

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

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

	return ret;
}

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

	rcu_read_lock();

	ba_data = rcu_dereference(*rcu_ptr);

	if (WARN_ON(!ba_data))
		goto unlock;

	if (!ba_data->timeout)
		goto unlock;

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

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

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

	lockdep_assert_held(&mvm->mutex);

	used_hw_queues = iwl_mvm_get_used_hw_queues(mvm, NULL);

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

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

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

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

	return 0;
}

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

	lockdep_assert_held(&mvm->mutex);

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

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

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

	rcu_read_lock();

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

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

	mvmsta = iwl_mvm_sta_from_mac80211(sta);

	mvmsta->tid_disable_agg |= disable_agg_tids;

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

	rcu_read_unlock();

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

	return ret;
}

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

	lockdep_assert_held(&mvm->mutex);

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

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

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

	mvmsta = iwl_mvm_sta_from_mac80211(sta);

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

	return agg_tids;
}

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

	lockdep_assert_held(&mvm->mutex);

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

	rcu_read_lock();

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

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

	mvmsta = iwl_mvm_sta_from_mac80211(sta);

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

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

	rcu_read_unlock();

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

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

	lockdep_assert_held(&mvm->queue_info_lock);

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

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

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

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

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

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

	/* Make sure queue found (or not) is legal */
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	if (!iwl_mvm_is_dqa_data_queue(mvm, queue) &&
	    !iwl_mvm_is_dqa_mgmt_queue(mvm, queue) &&
	    (queue != IWL_MVM_DQA_BSS_CLIENT_QUEUE)) {
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		IWL_ERR(mvm, "No DATA queues available to share\n");
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		return -ENOSPC;
	}

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

	return queue;
}

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/*
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 * If a given queue has a higher AC than the TID stream that is being compared
 * to, the queue needs to be redirected to the lower AC. This function does that
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 * in such a case, otherwise - if no redirection required - it does nothing,
 * unless the %force param is true.
 */
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int iwl_mvm_scd_queue_redirect(struct iwl_mvm *mvm, int queue, int tid,
			       int ac, int ssn, unsigned int wdg_timeout,
			       bool force)
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{
	struct iwl_scd_txq_cfg_cmd cmd = {
		.scd_queue = queue,
		.enable = 0,
	};
	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];
	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);

569
	IWL_DEBUG_TX_QUEUES(mvm, "Redirecting TXQ #%d to FIFO #%d\n",
570 571 572 573 574 575 576 577 578 579 580 581 582 583 584 585 586 587 588 589 590 591 592 593 594 595 596 597 598 599 600 601 602 603 604 605 606 607 608 609 610 611 612 613 614 615 616 617 618 619 620 621
			    queue, iwl_mvm_ac_to_tx_fifo[ac]);

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

	/* Before redirecting the queue we need to de-activate it */
	iwl_trans_txq_disable(mvm->trans, queue, false);
	ret = iwl_mvm_send_cmd_pdu(mvm, SCD_QUEUE_CFG, 0, sizeof(cmd), &cmd);
	if (ret)
		IWL_ERR(mvm, "Failed SCD disable TXQ %d (ret=%d)\n", queue,
			ret);

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

	/* 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;
}

622 623 624 625 626 627 628 629 630 631 632 633 634 635 636
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;
637 638 639
	bool using_inactive_queue = false;
	unsigned long disable_agg_tids = 0;
	enum iwl_mvm_agg_state queue_state;
640
	bool shared_queue = false;
641
	int ssn;
642
	unsigned long tfd_queue_mask;
643
	int ret;
644 645 646

	lockdep_assert_held(&mvm->mutex);

647 648 649 650
	spin_lock_bh(&mvmsta->lock);
	tfd_queue_mask = mvmsta->tfd_queue_msk;
	spin_unlock_bh(&mvmsta->lock);

651
	spin_lock_bh(&mvm->queue_info_lock);
652 653 654 655 656 657 658

	/*
	 * 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)) {
659 660
		queue = iwl_mvm_find_free_queue(mvm, mvmsta->sta_id,
						IWL_MVM_DQA_MIN_MGMT_QUEUE,
661 662 663 664 665 666 667 668
						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 */
	}

669 670 671 672 673
	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)) {
674
		queue = mvmsta->reserved_queue;
675
		mvm->queue_info[queue].reserved = true;
676 677 678 679
		IWL_DEBUG_TX_QUEUES(mvm, "Using reserved queue #%d\n", queue);
	}

	if (queue < 0)
680 681
		queue = iwl_mvm_find_free_queue(mvm, mvmsta->sta_id,
						IWL_MVM_DQA_MIN_DATA_QUEUE,
682
						IWL_MVM_DQA_MAX_DATA_QUEUE);
683

684 685 686 687 688 689 690 691 692 693 694 695 696 697 698
	/*
	 * 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);
	}

699 700 701 702 703 704 705 706 707
	/* 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;
		}
	}

708 709 710 711 712 713
	/*
	 * 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.
	 */
714
	if ((queue > 0) && !shared_queue)
715
		mvm->queue_info[queue].status = IWL_MVM_QUEUE_READY;
716

717
	spin_unlock_bh(&mvm->queue_info_lock);
718

719 720 721 722
	/* 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);
723
		return queue;
724
	}
725 726 727 728 729 730 731

	/*
	 * 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
	 */
732 733
	cfg.aggregate = (queue >= IWL_MVM_DQA_MIN_DATA_QUEUE ||
			 queue == IWL_MVM_DQA_BSS_CLIENT_QUEUE);
734

735 736 737 738 739 740 741 742 743
	/*
	 * If this queue was previously inactive (idle) - we need to free it
	 * first
	 */
	if (using_inactive_queue) {
		struct iwl_scd_txq_cfg_cmd cmd = {
			.scd_queue = queue,
			.enable = 0,
		};
744
		u8 ac;
745 746 747

		disable_agg_tids = iwl_mvm_remove_sta_queue_marking(mvm, queue);

748 749 750 751 752 753
		spin_lock_bh(&mvm->queue_info_lock);
		ac = mvm->queue_info[queue].mac80211_ac;
		cmd.sta_id = mvm->queue_info[queue].ra_sta_id;
		cmd.tx_fifo = iwl_mvm_ac_to_tx_fifo[ac];
		spin_unlock_bh(&mvm->queue_info_lock);

754 755 756 757 758 759 760 761 762 763 764 765 766 767 768 769 770 771 772 773
		/* Disable the queue */
		iwl_mvm_invalidate_sta_queue(mvm, queue, disable_agg_tids,
					     true);
		iwl_trans_txq_disable(mvm->trans, queue, false);
		ret = iwl_mvm_send_cmd_pdu(mvm, SCD_QUEUE_CFG, 0, sizeof(cmd),
					   &cmd);
		if (ret) {
			IWL_ERR(mvm,
				"Failed to free inactive queue %d (ret=%d)\n",
				queue, ret);

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

			return ret;
		}
	}

774 775 776 777 778 779 780 781 782 783 784 785 786 787 788 789
	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);
		}
	}
790 791 792 793 794

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

795 796 797 798 799 800 801 802 803
	/*
	 * 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);

804 805
	spin_lock_bh(&mvmsta->lock);
	mvmsta->tid_data[tid].txq_id = queue;
806
	mvmsta->tid_data[tid].is_tid_active = true;
807
	mvmsta->tfd_queue_msk |= BIT(queue);
808
	queue_state = mvmsta->tid_data[tid].state;
809 810 811 812 813

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

814 815 816 817
	if (!shared_queue) {
		ret = iwl_mvm_sta_send_to_fw(mvm, sta, true, STA_MODIFY_QUEUES);
		if (ret)
			goto out_err;
818

819 820 821 822 823 824
		/* 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;
		}
825 826 827 828 829 830
	} else {
		/* Redirect queue, if needed */
		ret = iwl_mvm_scd_queue_redirect(mvm, queue, tid, ac, ssn,
						 wdg_timeout, false);
		if (ret)
			goto out_err;
831
	}
832

833
	return 0;
834 835 836 837 838

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

	return ret;
839 840
}

841 842 843 844 845 846 847 848 849 850 851 852 853 854 855 856 857 858 859 860 861 862 863 864 865 866 867 868 869 870 871 872 873 874 875 876 877 878 879 880 881 882 883 884 885 886 887 888 889 890 891 892 893 894 895 896 897 898 899 900 901 902 903 904 905 906 907 908 909 910 911 912 913 914 915 916 917 918
static void iwl_mvm_unshare_queue(struct iwl_mvm *mvm, int queue)
{
	struct ieee80211_sta *sta;
	struct iwl_mvm_sta *mvmsta;
	s8 sta_id;
	int tid = -1;
	unsigned long tid_bitmap;
	unsigned int wdg_timeout;
	int ssn;
	int ret = true;

	lockdep_assert_held(&mvm->mutex);

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

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

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

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

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

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

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

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

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

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

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

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

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

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

919 920 921 922 923 924 925 926 927 928 929 930 931 932 933 934 935 936 937 938 939 940 941 942 943 944 945 946 947 948 949 950 951 952 953 954 955 956 957 958 959 960 961 962 963
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);

964 965
	/* Disable bottom-halves when entering TX path */
	local_bh_disable();
966 967 968 969 970 971 972 973 974 975 976 977 978 979 980 981 982 983 984 985
	spin_lock(&mvmsta->lock);
	skb_queue_splice_init(&tid_data->deferred_tx_frames, &deferred_tx);
	spin_unlock(&mvmsta->lock);

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

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

void iwl_mvm_add_new_dqa_stream_wk(struct work_struct *wk)
{
	struct iwl_mvm *mvm = container_of(wk, struct iwl_mvm,
					   add_stream_wk);
	struct ieee80211_sta *sta;
	struct iwl_mvm_sta *mvmsta;
	unsigned long deferred_tid_traffic;
986
	int queue, sta_id, tid;
987

988 989 990
	/* Check inactivity of queues */
	iwl_mvm_inactivity_check(mvm);

991 992
	mutex_lock(&mvm->mutex);

993 994 995 996 997 998 999 1000 1001 1002 1003 1004 1005
	/* Reconfigure queues requiring reconfiguation */
	for (queue = 0; queue < IWL_MAX_HW_QUEUES; queue++) {
		bool reconfig;

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

		if (reconfig)
			iwl_mvm_unshare_queue(mvm, queue);
	}

1006 1007 1008 1009 1010 1011 1012 1013 1014 1015 1016 1017 1018 1019 1020 1021 1022 1023 1024 1025 1026
	/* 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,
1027 1028
				      struct ieee80211_sta *sta,
				      enum nl80211_iftype vif_type)
1029 1030 1031 1032
{
	struct iwl_mvm_sta *mvmsta = iwl_mvm_sta_from_mac80211(sta);
	int queue;

1033 1034 1035 1036 1037 1038
	/*
	 * 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);

1039 1040 1041
	spin_lock_bh(&mvm->queue_info_lock);

	/* Make sure we have free resources for this STA */
1042 1043
	if (vif_type == NL80211_IFTYPE_STATION && !sta->tdls &&
	    !mvm->queue_info[IWL_MVM_DQA_BSS_CLIENT_QUEUE].hw_queue_refcount &&
1044 1045
	    (mvm->queue_info[IWL_MVM_DQA_BSS_CLIENT_QUEUE].status ==
	     IWL_MVM_QUEUE_FREE))
1046 1047
		queue = IWL_MVM_DQA_BSS_CLIENT_QUEUE;
	else
1048 1049
		queue = iwl_mvm_find_free_queue(mvm, mvmsta->sta_id,
						IWL_MVM_DQA_MIN_DATA_QUEUE,
1050
						IWL_MVM_DQA_MAX_DATA_QUEUE);
1051 1052 1053 1054 1055
	if (queue < 0) {
		spin_unlock_bh(&mvm->queue_info_lock);
		IWL_ERR(mvm, "No available queues for new station\n");
		return -ENOSPC;
	}
1056
	mvm->queue_info[queue].status = IWL_MVM_QUEUE_RESERVED;
1057 1058 1059 1060 1061 1062 1063 1064 1065 1066 1067

	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;
}

J
Johannes Berg 已提交
1068 1069 1070 1071 1072
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);
1073
	struct iwl_mvm_sta *mvm_sta = iwl_mvm_sta_from_mac80211(sta);
1074
	struct iwl_mvm_rxq_dup_data *dup_data;
J
Johannes Berg 已提交
1075 1076 1077 1078 1079
	int i, ret, sta_id;

	lockdep_assert_held(&mvm->mutex);

	if (!test_bit(IWL_MVM_STATUS_IN_HW_RESTART, &mvm->status))
1080 1081
		sta_id = iwl_mvm_find_free_sta_id(mvm,
						  ieee80211_vif_type_p2p(vif));
J
Johannes Berg 已提交
1082 1083 1084
	else
		sta_id = mvm_sta->sta_id;

1085
	if (sta_id == IWL_MVM_STATION_COUNT)
J
Johannes Berg 已提交
1086 1087 1088 1089 1090 1091 1092 1093 1094
		return -ENOSPC;

	spin_lock_init(&mvm_sta->lock);

	mvm_sta->sta_id = sta_id;
	mvm_sta->mac_id_n_color = FW_CMD_ID_AND_COLOR(mvmvif->id,
						      mvmvif->color);
	mvm_sta->vif = vif;
	mvm_sta->max_agg_bufsize = LINK_QUAL_AGG_FRAME_LIMIT_DEF;
1095 1096
	mvm_sta->tx_protection = 0;
	mvm_sta->tt_tx_protection = false;
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Johannes Berg 已提交
1097 1098

	/* HW restart, don't assume the memory has been zeroed */
1099
	atomic_set(&mvm->pending_frames[sta_id], 0);
1100
	mvm_sta->tid_disable_agg = 0xffff; /* No aggs at first */
J
Johannes Berg 已提交
1101
	mvm_sta->tfd_queue_msk = 0;
1102

1103 1104 1105 1106 1107
	/*
	 * 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) {
1108 1109 1110
		ret = iwl_mvm_tdls_sta_init(mvm, sta);
		if (ret)
			return ret;
1111
	} else if (!iwl_mvm_is_dqa_supported(mvm)) {
1112 1113 1114 1115
		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
1116

1117
	/* for HW restart - reset everything but the sequence number */
1118
	for (i = 0; i <= IWL_MAX_TID_COUNT; i++) {
1119 1120 1121
		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;
1122 1123 1124 1125 1126 1127 1128 1129 1130 1131

		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);
1132
	}
1133
	mvm_sta->deferred_traffic_tid_map = 0;
1134
	mvm_sta->agg_tids = 0;
J
Johannes Berg 已提交
1135

1136 1137 1138 1139 1140 1141 1142 1143 1144 1145
	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;
	}

1146
	if (iwl_mvm_is_dqa_supported(mvm)) {
1147 1148
		ret = iwl_mvm_reserve_sta_stream(mvm, sta,
						 ieee80211_vif_type_p2p(vif));
1149 1150 1151 1152 1153
		if (ret)
			goto err;
	}

	ret = iwl_mvm_sta_send_to_fw(mvm, sta, false, 0);
J
Johannes Berg 已提交
1154
	if (ret)
1155
		goto err;
J
Johannes Berg 已提交
1156

1157 1158 1159 1160 1161 1162 1163 1164
	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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1165 1166 1167 1168

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

	return 0;
1169 1170

err:
1171 1172
	if (!iwl_mvm_is_dqa_supported(mvm) && sta->tdls)
		iwl_mvm_tdls_sta_deinit(mvm, sta);
1173
	return ret;
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Johannes Berg 已提交
1174 1175
}

1176 1177 1178 1179
int iwl_mvm_update_sta(struct iwl_mvm *mvm,
		       struct ieee80211_vif *vif,
		       struct ieee80211_sta *sta)
{
1180
	return iwl_mvm_sta_send_to_fw(mvm, sta, true, 0);
1181 1182
}

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1183 1184 1185
int iwl_mvm_drain_sta(struct iwl_mvm *mvm, struct iwl_mvm_sta *mvmsta,
		      bool drain)
{
1186
	struct iwl_mvm_add_sta_cmd cmd = {};
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1187 1188 1189 1190 1191 1192 1193 1194 1195 1196 1197 1198
	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;
1199 1200
	ret = iwl_mvm_send_cmd_pdu_status(mvm, ADD_STA,
					  iwl_mvm_add_sta_cmd_size(mvm),
1201
					  &cmd, &status);
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Johannes Berg 已提交
1202 1203 1204
	if (ret)
		return ret;

1205
	switch (status & IWL_ADD_STA_STATUS_MASK) {
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1206 1207 1208 1209 1210 1211 1212 1213 1214 1215 1216 1217 1218 1219 1220 1221 1222 1223 1224 1225 1226 1227 1228 1229 1230 1231 1232 1233 1234 1235 1236 1237 1238 1239 1240 1241
	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
1242
	ret = iwl_mvm_send_cmd_pdu(mvm, REMOVE_STA, 0,
J
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1243 1244 1245 1246 1247 1248 1249 1250 1251 1252 1253 1254 1255 1256 1257 1258 1259 1260 1261 1262 1263 1264 1265 1266 1267 1268 1269 1270 1271
				   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));

1272 1273 1274 1275 1276 1277 1278 1279 1280
		/*
		 * This station is in use or RCU-removed; the latter happens in
		 * managed mode, where mac80211 removes the station before we
		 * can remove it from firmware (we can only do that after the
		 * MAC is marked unassociated), and possibly while the deauth
		 * frame to disconnect from the AP is still queued. Then, the
		 * station pointer is -ENOENT when the last skb is reclaimed.
		 */
		if (!IS_ERR(sta) || PTR_ERR(sta) == -ENOENT)
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Johannes Berg 已提交
1281 1282 1283 1284 1285 1286 1287 1288 1289 1290 1291 1292 1293 1294 1295 1296 1297 1298 1299 1300 1301 1302 1303 1304 1305
			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;
		}
1306
		RCU_INIT_POINTER(mvm->fw_id_to_mac_id[sta_id], NULL);
J
Johannes Berg 已提交
1307
		clear_bit(sta_id, mvm->sta_drained);
1308 1309 1310 1311

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

1312
			for_each_set_bit(i, &msk, sizeof(msk) * BITS_PER_BYTE)
1313 1314
				iwl_mvm_disable_txq(mvm, i, i,
						    IWL_MAX_TID_COUNT, 0);
1315 1316 1317 1318 1319

			mvm->tfd_drained[sta_id] = 0;
			IWL_DEBUG_TDLS(mvm, "Drained sta %d, with queues %ld\n",
				       sta_id, msk);
		}
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1320 1321 1322 1323 1324
	}

	mutex_unlock(&mvm->mutex);
}

1325 1326 1327 1328 1329 1330 1331 1332 1333 1334 1335 1336 1337 1338 1339 1340 1341 1342 1343 1344
static void iwl_mvm_disable_sta_queues(struct iwl_mvm *mvm,
				       struct ieee80211_vif *vif,
				       struct iwl_mvm_sta *mvm_sta)
{
	int ac;
	int i;

	lockdep_assert_held(&mvm->mutex);

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

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

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1345 1346 1347 1348 1349
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);
1350
	struct iwl_mvm_sta *mvm_sta = iwl_mvm_sta_from_mac80211(sta);
J
Johannes Berg 已提交
1351 1352 1353 1354
	int ret;

	lockdep_assert_held(&mvm->mutex);

1355 1356 1357
	if (iwl_mvm_has_new_rx_api(mvm))
		kfree(mvm_sta->dup_data);

1358 1359 1360
	if ((vif->type == NL80211_IFTYPE_STATION &&
	     mvmvif->ap_sta_id == mvm_sta->sta_id) ||
	    iwl_mvm_is_dqa_supported(mvm)){
1361 1362 1363
		ret = iwl_mvm_drain_sta(mvm, mvm_sta, true);
		if (ret)
			return ret;
1364
		/* flush its queues here since we are freeing mvm_sta */
1365
		ret = iwl_mvm_flush_tx_path(mvm, mvm_sta->tfd_queue_msk, 0);
1366 1367 1368 1369 1370 1371 1372
		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);
1373

1374 1375 1376 1377
		/* If DQA is supported - the queues can be disabled now */
		if (iwl_mvm_is_dqa_supported(mvm))
			iwl_mvm_disable_sta_queues(mvm, vif, mvm_sta);

1378 1379 1380 1381 1382
		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
1383

1384 1385
			/* unassoc - go ahead - remove the AP STA now */
			mvmvif->ap_sta_id = IWL_MVM_STATION_COUNT;
1386

1387 1388 1389 1390
			/* 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
1391 1392
	}

1393 1394 1395 1396 1397 1398 1399 1400 1401
	/*
	 * 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);
	}

1402 1403 1404 1405 1406
	/*
	 * 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
1407 1408 1409 1410
	/*
	 * There are frames pending on the AC queues for this station.
	 * We need to wait until all the frames are drained...
	 */
1411
	if (atomic_read(&mvm->pending_frames[mvm_sta->sta_id])) {
J
Johannes Berg 已提交
1412 1413
		rcu_assign_pointer(mvm->fw_id_to_mac_id[mvm_sta->sta_id],
				   ERR_PTR(-EBUSY));
1414
		spin_unlock_bh(&mvm_sta->lock);
1415 1416 1417 1418 1419 1420 1421 1422 1423

		/* 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);
		}

1424
		ret = iwl_mvm_drain_sta(mvm, mvm_sta, true);
J
Johannes Berg 已提交
1425
	} else {
1426
		spin_unlock_bh(&mvm_sta->lock);
1427

1428
		if (!iwl_mvm_is_dqa_supported(mvm) && sta->tdls)
1429 1430
			iwl_mvm_tdls_sta_deinit(mvm, sta);

J
Johannes Berg 已提交
1431
		ret = iwl_mvm_rm_sta_common(mvm, mvm_sta->sta_id);
1432
		RCU_INIT_POINTER(mvm->fw_id_to_mac_id[mvm_sta->sta_id], NULL);
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Johannes Berg 已提交
1433 1434 1435 1436 1437 1438 1439 1440 1441 1442 1443 1444 1445
	}

	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);

1446
	RCU_INIT_POINTER(mvm->fw_id_to_mac_id[sta_id], NULL);
J
Johannes Berg 已提交
1447 1448 1449
	return ret;
}

1450 1451 1452
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
1453 1454
{
	if (!test_bit(IWL_MVM_STATUS_IN_HW_RESTART, &mvm->status)) {
1455
		sta->sta_id = iwl_mvm_find_free_sta_id(mvm, iftype);
J
Johannes Berg 已提交
1456 1457 1458 1459 1460 1461 1462 1463 1464 1465 1466
		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;
}

1467 1468
static void iwl_mvm_dealloc_int_sta(struct iwl_mvm *mvm,
				    struct iwl_mvm_int_sta *sta)
J
Johannes Berg 已提交
1469
{
1470
	RCU_INIT_POINTER(mvm->fw_id_to_mac_id[sta->sta_id], NULL);
J
Johannes Berg 已提交
1471 1472 1473 1474 1475 1476 1477 1478 1479
	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)
{
1480
	struct iwl_mvm_add_sta_cmd cmd;
J
Johannes Berg 已提交
1481 1482 1483 1484 1485
	int ret;
	u32 status;

	lockdep_assert_held(&mvm->mutex);

1486
	memset(&cmd, 0, sizeof(cmd));
J
Johannes Berg 已提交
1487 1488 1489 1490 1491
	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);
1492
	cmd.tid_disable_tx = cpu_to_le16(0xffff);
J
Johannes Berg 已提交
1493 1494 1495 1496

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

1497 1498
	ret = iwl_mvm_send_cmd_pdu_status(mvm, ADD_STA,
					  iwl_mvm_add_sta_cmd_size(mvm),
1499
					  &cmd, &status);
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Johannes Berg 已提交
1500 1501 1502
	if (ret)
		return ret;

1503
	switch (status & IWL_ADD_STA_STATUS_MASK) {
J
Johannes Berg 已提交
1504 1505 1506 1507 1508 1509 1510 1511 1512 1513 1514 1515 1516 1517
	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)
{
1518 1519 1520
	unsigned int wdg_timeout = iwlmvm_mod_params.tfd_q_hang_detect ?
					mvm->cfg->base_params->wd_timeout :
					IWL_WATCHDOG_DISABLED;
J
Johannes Berg 已提交
1521 1522 1523 1524
	int ret;

	lockdep_assert_held(&mvm->mutex);

A
Ariej Marjieh 已提交
1525
	/* Map Aux queue to fifo - needs to happen before adding Aux station */
1526 1527 1528
	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);
A
Ariej Marjieh 已提交
1529 1530 1531

	/* Allocate aux station and assign to it the aux queue */
	ret = iwl_mvm_allocate_int_sta(mvm, &mvm->aux_sta, BIT(mvm->aux_queue),
1532
				       NL80211_IFTYPE_UNSPECIFIED);
J
Johannes Berg 已提交
1533 1534 1535
	if (ret)
		return ret;

1536 1537 1538 1539 1540 1541 1542 1543 1544 1545 1546 1547 1548
	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);
	}

J
Johannes Berg 已提交
1549 1550 1551 1552 1553 1554 1555 1556
	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;
}

1557 1558 1559 1560 1561 1562 1563 1564 1565 1566 1567 1568 1569 1570 1571 1572 1573 1574 1575 1576 1577 1578 1579 1580 1581 1582 1583
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);
}

1584 1585 1586 1587 1588 1589 1590
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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1591 1592 1593 1594 1595 1596 1597 1598
/*
 * 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.
 */
1599
int iwl_mvm_send_add_bcast_sta(struct iwl_mvm *mvm, struct ieee80211_vif *vif)
J
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1600 1601
{
	struct iwl_mvm_vif *mvmvif = iwl_mvm_vif_from_mac80211(vif);
1602
	struct iwl_mvm_int_sta *bsta = &mvmvif->bcast_sta;
J
Johannes Berg 已提交
1603
	static const u8 _baddr[] = {0xFF, 0xFF, 0xFF, 0xFF, 0xFF, 0xFF};
1604
	const u8 *baddr = _baddr;
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1605 1606 1607

	lockdep_assert_held(&mvm->mutex);

1608 1609 1610 1611 1612 1613 1614 1615 1616 1617 1618 1619 1620 1621 1622 1623
	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;
1624 1625 1626 1627
		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;
1628 1629 1630 1631 1632 1633 1634
		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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1635 1636 1637
	if (vif->type == NL80211_IFTYPE_ADHOC)
		baddr = vif->bss_conf.bssid;

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1638 1639 1640 1641 1642 1643 1644 1645 1646
	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. */
1647
int iwl_mvm_send_rm_bcast_sta(struct iwl_mvm *mvm, struct ieee80211_vif *vif)
J
Johannes Berg 已提交
1648
{
1649
	struct iwl_mvm_vif *mvmvif = iwl_mvm_vif_from_mac80211(vif);
J
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1650 1651 1652 1653
	int ret;

	lockdep_assert_held(&mvm->mutex);

1654
	ret = iwl_mvm_rm_sta_common(mvm, mvmvif->bcast_sta.sta_id);
J
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1655 1656 1657 1658 1659
	if (ret)
		IWL_WARN(mvm, "Failed sending remove station\n");
	return ret;
}

1660 1661 1662
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);
1663
	u32 qmask = 0;
1664 1665 1666

	lockdep_assert_held(&mvm->mutex);

1667 1668
	if (!iwl_mvm_is_dqa_supported(mvm))
		qmask = iwl_mvm_mac_get_queues_mask(vif);
1669

1670 1671 1672 1673 1674 1675
	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.
		 */
1676 1677
		qmask &= ~BIT(vif->cab_queue);

1678 1679
		if (iwl_mvm_is_dqa_supported(mvm))
			qmask |= BIT(IWL_MVM_DQA_AP_PROBE_RESP_QUEUE);
1680 1681 1682
	} else if (iwl_mvm_is_dqa_supported(mvm) &&
		   vif->type == NL80211_IFTYPE_P2P_DEVICE) {
		qmask |= BIT(IWL_MVM_DQA_P2P_DEVICE_QUEUE);
1683 1684
	}

1685 1686 1687 1688
	return iwl_mvm_allocate_int_sta(mvm, &mvmvif->bcast_sta, qmask,
					ieee80211_vif_type_p2p(vif));
}

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1689 1690 1691 1692 1693 1694 1695
/* 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. */
1696
int iwl_mvm_add_bcast_sta(struct iwl_mvm *mvm, struct ieee80211_vif *vif)
J
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1697 1698
{
	struct iwl_mvm_vif *mvmvif = iwl_mvm_vif_from_mac80211(vif);
1699
	struct iwl_mvm_int_sta *bsta = &mvmvif->bcast_sta;
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1700 1701 1702 1703
	int ret;

	lockdep_assert_held(&mvm->mutex);

1704
	ret = iwl_mvm_alloc_bcast_sta(mvm, vif);
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1705 1706 1707
	if (ret)
		return ret;

1708
	ret = iwl_mvm_send_add_bcast_sta(mvm, vif);
J
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1709 1710 1711

	if (ret)
		iwl_mvm_dealloc_int_sta(mvm, bsta);
1712

J
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1713 1714 1715
	return ret;
}

1716 1717 1718 1719 1720 1721 1722
void iwl_mvm_dealloc_bcast_sta(struct iwl_mvm *mvm, struct ieee80211_vif *vif)
{
	struct iwl_mvm_vif *mvmvif = iwl_mvm_vif_from_mac80211(vif);

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

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1723 1724 1725 1726
/*
 * 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.
 */
1727
int iwl_mvm_rm_bcast_sta(struct iwl_mvm *mvm, struct ieee80211_vif *vif)
J
Johannes Berg 已提交
1728 1729 1730 1731 1732
{
	int ret;

	lockdep_assert_held(&mvm->mutex);

1733 1734 1735
	ret = iwl_mvm_send_rm_bcast_sta(mvm, vif);

	iwl_mvm_dealloc_bcast_sta(mvm, vif);
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Johannes Berg 已提交
1736 1737 1738 1739

	return ret;
}

1740 1741
#define IWL_MAX_RX_BA_SESSIONS 16

1742
static void iwl_mvm_sync_rxq_del_ba(struct iwl_mvm *mvm, u8 baid)
1743
{
1744 1745 1746 1747
	struct iwl_mvm_delba_notif notif = {
		.metadata.type = IWL_MVM_RXQ_NOTIF_DEL_BA,
		.metadata.sync = 1,
		.delba.baid = baid,
1748
	};
1749 1750
	iwl_mvm_sync_rx_queues_internal(mvm, (void *)&notif, sizeof(notif));
};
1751

1752 1753 1754 1755 1756 1757 1758 1759 1760 1761 1762 1763
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];

1764 1765 1766
		spin_lock_bh(&reorder_buf->lock);
		if (likely(!reorder_buf->num_stored)) {
			spin_unlock_bh(&reorder_buf->lock);
1767
			continue;
1768
		}
1769 1770 1771 1772 1773 1774 1775 1776 1777 1778

		/*
		 * 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]);
1779 1780 1781 1782 1783 1784 1785 1786 1787 1788 1789
		/*
		 * 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);
1790 1791 1792 1793 1794 1795 1796 1797 1798 1799 1800 1801 1802 1803 1804 1805 1806 1807
	}
}

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;
1808 1809 1810 1811 1812 1813 1814
		/* 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;
1815 1816 1817 1818 1819
		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]);
	}
1820 1821
}

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1822
int iwl_mvm_sta_rx_agg(struct iwl_mvm *mvm, struct ieee80211_sta *sta,
1823
		       int tid, u16 ssn, bool start, u8 buf_size, u16 timeout)
J
Johannes Berg 已提交
1824
{
1825
	struct iwl_mvm_sta *mvm_sta = iwl_mvm_sta_from_mac80211(sta);
1826
	struct iwl_mvm_add_sta_cmd cmd = {};
1827
	struct iwl_mvm_baid_data *baid_data = NULL;
J
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1828 1829 1830 1831 1832
	int ret;
	u32 status;

	lockdep_assert_held(&mvm->mutex);

1833 1834 1835 1836 1837
	if (start && mvm->rx_ba_sessions >= IWL_MAX_RX_BA_SESSIONS) {
		IWL_WARN(mvm, "Not enough RX BA SESSIONS\n");
		return -ENOSPC;
	}

1838 1839 1840 1841 1842
	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
		 */
1843 1844 1845 1846
		baid_data = kzalloc(sizeof(*baid_data) +
				    mvm->trans->num_rx_queues *
				    sizeof(baid_data->reorder_buf[0]),
				    GFP_KERNEL);
1847 1848 1849 1850
		if (!baid_data)
			return -ENOMEM;
	}

J
Johannes Berg 已提交
1851 1852 1853
	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;
1854 1855 1856
	if (start) {
		cmd.add_immediate_ba_tid = (u8) tid;
		cmd.add_immediate_ba_ssn = cpu_to_le16(ssn);
1857
		cmd.rx_ba_window = cpu_to_le16((u16)buf_size);
1858 1859 1860
	} else {
		cmd.remove_immediate_ba_tid = (u8) tid;
	}
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1861 1862 1863 1864
	cmd.modify_mask = start ? STA_MODIFY_ADD_BA_TID :
				  STA_MODIFY_REMOVE_BA_TID;

	status = ADD_STA_SUCCESS;
1865 1866
	ret = iwl_mvm_send_cmd_pdu_status(mvm, ADD_STA,
					  iwl_mvm_add_sta_cmd_size(mvm),
1867
					  &cmd, &status);
J
Johannes Berg 已提交
1868
	if (ret)
1869
		goto out_free;
J
Johannes Berg 已提交
1870

1871
	switch (status & IWL_ADD_STA_STATUS_MASK) {
J
Johannes Berg 已提交
1872
	case ADD_STA_SUCCESS:
1873 1874
		IWL_DEBUG_HT(mvm, "RX BA Session %sed in fw\n",
			     start ? "start" : "stopp");
J
Johannes Berg 已提交
1875 1876 1877 1878 1879 1880 1881 1882 1883 1884 1885 1886
		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;
	}

1887 1888 1889 1890 1891 1892 1893 1894 1895 1896 1897 1898 1899 1900 1901 1902 1903 1904 1905 1906 1907 1908 1909 1910 1911 1912 1913 1914 1915 1916 1917 1918 1919 1920
	if (ret)
		goto out_free;

	if (start) {
		u8 baid;

		mvm->rx_ba_sessions++;

		if (!iwl_mvm_has_new_rx_api(mvm))
			return 0;

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

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

1921 1922
		iwl_mvm_init_reorder_buffer(mvm, mvm_sta->sta_id,
					    baid_data, ssn, buf_size);
1923 1924 1925 1926 1927 1928
		/*
		 * 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
		 */
1929 1930
		IWL_DEBUG_HT(mvm, "Sta %d(%d) is assigned to BAID %d\n",
			     mvm_sta->sta_id, tid, baid);
1931 1932
		WARN_ON(rcu_access_pointer(mvm->baid_map[baid]));
		rcu_assign_pointer(mvm->baid_map[baid], baid_data);
1933
	} else  {
1934 1935
		u8 baid = mvm_sta->tid_to_baid[tid];

1936 1937 1938
		if (mvm->rx_ba_sessions > 0)
			/* check that restart flow didn't zero the counter */
			mvm->rx_ba_sessions--;
1939 1940 1941 1942 1943 1944 1945 1946 1947 1948 1949
		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 */
1950
		iwl_mvm_free_reorder(mvm, baid_data);
1951 1952 1953
		del_timer_sync(&baid_data->session_timer);
		RCU_INIT_POINTER(mvm->baid_map[baid], NULL);
		kfree_rcu(baid_data, rcu_head);
1954
		IWL_DEBUG_HT(mvm, "BAID %d is free\n", baid);
1955
	}
1956
	return 0;
1957

1958 1959
out_free:
	kfree(baid_data);
J
Johannes Berg 已提交
1960 1961 1962
	return ret;
}

1963 1964
int iwl_mvm_sta_tx_agg(struct iwl_mvm *mvm, struct ieee80211_sta *sta,
		       int tid, u8 queue, bool start)
J
Johannes Berg 已提交
1965
{
1966
	struct iwl_mvm_sta *mvm_sta = iwl_mvm_sta_from_mac80211(sta);
1967
	struct iwl_mvm_add_sta_cmd cmd = {};
J
Johannes Berg 已提交
1968 1969 1970 1971 1972 1973 1974 1975 1976
	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 {
1977 1978 1979
		/* 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
Johannes Berg 已提交
1980 1981 1982 1983 1984 1985 1986 1987 1988 1989 1990
		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;
1991 1992
	ret = iwl_mvm_send_cmd_pdu_status(mvm, ADD_STA,
					  iwl_mvm_add_sta_cmd_size(mvm),
1993
					  &cmd, &status);
J
Johannes Berg 已提交
1994 1995 1996
	if (ret)
		return ret;

1997
	switch (status & IWL_ADD_STA_STATUS_MASK) {
J
Johannes Berg 已提交
1998 1999 2000 2001 2002 2003 2004 2005 2006 2007 2008 2009
	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;
}

2010
const u8 tid_to_mac80211_ac[] = {
J
Johannes Berg 已提交
2011 2012 2013 2014 2015 2016 2017 2018
	IEEE80211_AC_BE,
	IEEE80211_AC_BK,
	IEEE80211_AC_BK,
	IEEE80211_AC_BE,
	IEEE80211_AC_VI,
	IEEE80211_AC_VI,
	IEEE80211_AC_VO,
	IEEE80211_AC_VO,
2019
	IEEE80211_AC_VO, /* We treat MGMT as TID 8, which is set as AC_VO */
J
Johannes Berg 已提交
2020 2021
};

2022 2023 2024 2025 2026 2027 2028 2029 2030 2031 2032
static const u8 tid_to_ucode_ac[] = {
	AC_BE,
	AC_BK,
	AC_BK,
	AC_BE,
	AC_VI,
	AC_VI,
	AC_VO,
	AC_VO,
};

J
Johannes Berg 已提交
2033 2034 2035
int iwl_mvm_sta_tx_agg_start(struct iwl_mvm *mvm, struct ieee80211_vif *vif,
			     struct ieee80211_sta *sta, u16 tid, u16 *ssn)
{
2036
	struct iwl_mvm_sta *mvmsta = iwl_mvm_sta_from_mac80211(sta);
J
Johannes Berg 已提交
2037 2038
	struct iwl_mvm_tid_data *tid_data;
	int txq_id;
2039
	int ret;
J
Johannes Berg 已提交
2040 2041 2042 2043 2044 2045 2046 2047 2048 2049 2050 2051

	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);

2052 2053 2054 2055 2056 2057 2058 2059 2060
	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;
	}

2061
	spin_lock(&mvm->queue_info_lock);
2062

2063 2064 2065 2066 2067 2068 2069 2070 2071
	/*
	 * 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;
2072 2073 2074 2075 2076 2077 2078 2079
	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) ||
2080
	    mvm->queue_info[txq_id].status != IWL_MVM_QUEUE_READY) {
2081 2082
		txq_id = iwl_mvm_find_free_queue(mvm, mvmsta->sta_id,
						 mvm->first_agg_queue,
2083 2084 2085 2086 2087 2088 2089 2090 2091
						 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;
2092
	}
2093 2094

	spin_unlock(&mvm->queue_info_lock);
J
Johannes Berg 已提交
2095

2096 2097 2098 2099
	IWL_DEBUG_TX_QUEUES(mvm,
			    "AGG for tid %d will be on queue #%d\n",
			    tid, txq_id);

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Johannes Berg 已提交
2100
	tid_data = &mvmsta->tid_data[tid];
2101
	tid_data->ssn = IEEE80211_SEQ_TO_SN(tid_data->seq_number);
J
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2102 2103 2104 2105 2106 2107 2108 2109 2110 2111 2112 2113 2114 2115 2116
	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;
	}

2117
	ret = 0;
2118
	goto out;
2119 2120

release_locks:
2121 2122
	spin_unlock(&mvm->queue_info_lock);
out:
J
Johannes Berg 已提交
2123 2124
	spin_unlock_bh(&mvmsta->lock);

2125
	return ret;
J
Johannes Berg 已提交
2126 2127 2128
}

int iwl_mvm_sta_tx_agg_oper(struct iwl_mvm *mvm, struct ieee80211_vif *vif,
2129 2130
			    struct ieee80211_sta *sta, u16 tid, u8 buf_size,
			    bool amsdu)
J
Johannes Berg 已提交
2131
{
2132
	struct iwl_mvm_sta *mvmsta = iwl_mvm_sta_from_mac80211(sta);
J
Johannes Berg 已提交
2133
	struct iwl_mvm_tid_data *tid_data = &mvmsta->tid_data[tid];
2134 2135
	unsigned int wdg_timeout =
		iwl_mvm_get_wd_timeout(mvm, vif, sta->tdls, false);
2136
	int queue, ret;
2137
	bool alloc_queue = true;
2138
	enum iwl_mvm_queue_status queue_status;
J
Johannes Berg 已提交
2139 2140
	u16 ssn;

2141 2142 2143 2144 2145 2146 2147
	struct iwl_trans_txq_scd_cfg cfg = {
		.sta_id = mvmsta->sta_id,
		.tid = tid,
		.frame_limit = buf_size,
		.aggregate = true,
	};

2148 2149 2150
	BUILD_BUG_ON((sizeof(mvmsta->agg_tids) * BITS_PER_BYTE)
		     != IWL_MAX_TID_COUNT);

J
Johannes Berg 已提交
2151 2152 2153 2154 2155 2156
	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;
2157
	mvmsta->agg_tids |= BIT(tid);
J
Johannes Berg 已提交
2158
	tid_data->ssn = 0xffff;
2159
	tid_data->amsdu_in_ampdu_allowed = amsdu;
J
Johannes Berg 已提交
2160 2161
	spin_unlock_bh(&mvmsta->lock);

2162
	cfg.fifo = iwl_mvm_ac_to_tx_fifo[tid_to_mac80211_ac[tid]];
J
Johannes Berg 已提交
2163

2164 2165 2166 2167
	spin_lock_bh(&mvm->queue_info_lock);
	queue_status = mvm->queue_info[queue].status;
	spin_unlock_bh(&mvm->queue_info_lock);

2168 2169 2170 2171 2172 2173 2174 2175 2176 2177 2178 2179 2180 2181 2182 2183 2184 2185 2186 2187 2188 2189 2190 2191 2192 2193 2194 2195 2196 2197 2198 2199 2200 2201 2202 2203 2204 2205
	/* 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);
2206

2207 2208 2209 2210 2211 2212
	/* 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
2213

2214 2215
	/* No need to mark as reserved */
	spin_lock_bh(&mvm->queue_info_lock);
2216
	mvm->queue_info[queue].status = IWL_MVM_QUEUE_READY;
2217 2218
	spin_unlock_bh(&mvm->queue_info_lock);

J
Johannes Berg 已提交
2219 2220 2221 2222 2223 2224 2225 2226 2227 2228 2229
	/*
	 * 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;

2230 2231 2232
	IWL_DEBUG_HT(mvm, "Tx aggregation enabled on ra = %pM tid = %d\n",
		     sta->addr, tid);

2233
	return iwl_mvm_send_lq_cmd(mvm, &mvmsta->lq_sta.lq, false);
J
Johannes Berg 已提交
2234 2235 2236 2237 2238
}

int iwl_mvm_sta_tx_agg_stop(struct iwl_mvm *mvm, struct ieee80211_vif *vif,
			    struct ieee80211_sta *sta, u16 tid)
{
2239
	struct iwl_mvm_sta *mvmsta = iwl_mvm_sta_from_mac80211(sta);
J
Johannes Berg 已提交
2240 2241 2242 2243
	struct iwl_mvm_tid_data *tid_data = &mvmsta->tid_data[tid];
	u16 txq_id;
	int err;

2244 2245 2246 2247 2248 2249 2250 2251 2252
	/*
	 * 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
Johannes Berg 已提交
2253 2254 2255 2256 2257 2258 2259
	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);

2260 2261
	mvmsta->agg_tids &= ~BIT(tid);

2262
	spin_lock_bh(&mvm->queue_info_lock);
2263 2264 2265 2266 2267 2268 2269 2270 2271
	/*
	 * 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;
2272

2273 2274
	spin_unlock_bh(&mvm->queue_info_lock);

J
Johannes Berg 已提交
2275 2276
	switch (tid_data->state) {
	case IWL_AGG_ON:
2277
		tid_data->ssn = IEEE80211_SEQ_TO_SN(tid_data->seq_number);
J
Johannes Berg 已提交
2278 2279 2280 2281 2282 2283 2284 2285 2286 2287 2288 2289 2290

		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;
2291 2292 2293 2294 2295 2296 2297
		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);

2298 2299 2300 2301 2302
		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);
		}
2303
		return 0;
J
Johannes Berg 已提交
2304 2305 2306 2307 2308 2309 2310 2311 2312 2313 2314 2315 2316 2317 2318 2319 2320 2321 2322 2323 2324 2325 2326 2327 2328 2329 2330 2331
	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;
}

2332 2333 2334
int iwl_mvm_sta_tx_agg_flush(struct iwl_mvm *mvm, struct ieee80211_vif *vif,
			    struct ieee80211_sta *sta, u16 tid)
{
2335
	struct iwl_mvm_sta *mvmsta = iwl_mvm_sta_from_mac80211(sta);
2336 2337
	struct iwl_mvm_tid_data *tid_data = &mvmsta->tid_data[tid];
	u16 txq_id;
2338
	enum iwl_mvm_agg_state old_state;
2339 2340 2341 2342 2343 2344 2345 2346 2347

	/*
	 * 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);
2348
	old_state = tid_data->state;
2349
	tid_data->state = IWL_AGG_OFF;
2350
	mvmsta->agg_tids &= ~BIT(tid);
2351 2352
	spin_unlock_bh(&mvmsta->lock);

2353
	spin_lock_bh(&mvm->queue_info_lock);
2354 2355 2356 2357 2358 2359 2360 2361 2362
	/*
	 * 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;
2363 2364
	spin_unlock_bh(&mvm->queue_info_lock);

2365
	if (old_state >= IWL_AGG_ON) {
2366
		iwl_mvm_drain_sta(mvm, mvmsta, true);
2367
		if (iwl_mvm_flush_tx_path(mvm, BIT(txq_id), 0))
2368
			IWL_ERR(mvm, "Couldn't flush the AGG queue\n");
2369 2370 2371
		iwl_trans_wait_tx_queue_empty(mvm->trans,
					      mvmsta->tfd_queue_msk);
		iwl_mvm_drain_sta(mvm, mvmsta, false);
2372

2373 2374
		iwl_mvm_sta_tx_agg(mvm, sta, tid, txq_id, false);

2375 2376 2377 2378 2379 2380
		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);
		}
2381
	}
2382 2383 2384 2385

	return 0;
}

J
Johannes Berg 已提交
2386 2387
static int iwl_mvm_set_fw_key_idx(struct iwl_mvm *mvm)
{
2388
	int i, max = -1, max_offs = -1;
J
Johannes Berg 已提交
2389 2390 2391

	lockdep_assert_held(&mvm->mutex);

2392 2393 2394 2395 2396 2397 2398 2399 2400 2401 2402 2403 2404 2405
	/* 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
2406

2407
	if (max_offs < 0)
J
Johannes Berg 已提交
2408 2409
		return STA_KEY_IDX_INVALID;

2410
	return max_offs;
J
Johannes Berg 已提交
2411 2412
}

2413 2414 2415
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
2416
{
2417
	struct iwl_mvm_vif *mvmvif = iwl_mvm_vif_from_mac80211(vif);
J
Johannes Berg 已提交
2418

2419 2420
	if (sta)
		return iwl_mvm_sta_from_mac80211(sta);
J
Johannes Berg 已提交
2421 2422 2423 2424 2425 2426 2427

	/*
	 * 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 &&
2428 2429 2430
	    mvmvif->ap_sta_id != IWL_MVM_STATION_COUNT) {
		u8 sta_id = mvmvif->ap_sta_id;

2431 2432 2433
		sta = rcu_dereference_check(mvm->fw_id_to_mac_id[sta_id],
					    lockdep_is_held(&mvm->mutex));

2434 2435 2436 2437 2438
		/*
		 * 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.
		 */
2439 2440 2441 2442
		if (IS_ERR_OR_NULL(sta))
			return NULL;

		return iwl_mvm_sta_from_mac80211(sta);
2443
	}
J
Johannes Berg 已提交
2444

2445
	return NULL;
J
Johannes Berg 已提交
2446 2447 2448 2449
}

static int iwl_mvm_send_sta_key(struct iwl_mvm *mvm,
				struct iwl_mvm_sta *mvm_sta,
2450
				struct ieee80211_key_conf *keyconf, bool mcast,
2451 2452
				u32 tkip_iv32, u16 *tkip_p1k, u32 cmd_flags,
				u8 key_offset)
J
Johannes Berg 已提交
2453
{
2454
	struct iwl_mvm_add_sta_key_cmd cmd = {};
2455
	__le16 key_flags;
2456 2457
	int ret;
	u32 status;
J
Johannes Berg 已提交
2458 2459
	u16 keyidx;
	int i;
2460
	u8 sta_id = mvm_sta->sta_id;
J
Johannes Berg 已提交
2461 2462 2463 2464 2465 2466 2467 2468 2469

	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);
2470
		cmd.tkip_rx_tsc_byte2 = tkip_iv32;
J
Johannes Berg 已提交
2471
		for (i = 0; i < 5; i++)
2472 2473
			cmd.tkip_rx_ttak[i] = cpu_to_le16(tkip_p1k[i]);
		memcpy(cmd.key, keyconf->key, keyconf->keylen);
J
Johannes Berg 已提交
2474 2475 2476
		break;
	case WLAN_CIPHER_SUITE_CCMP:
		key_flags |= cpu_to_le16(STA_KEY_FLG_CCM);
2477
		memcpy(cmd.key, keyconf->key, keyconf->keylen);
J
Johannes Berg 已提交
2478
		break;
2479 2480
	case WLAN_CIPHER_SUITE_WEP104:
		key_flags |= cpu_to_le16(STA_KEY_FLG_WEP_13BYTES);
2481
		/* fall through */
2482 2483 2484 2485
	case WLAN_CIPHER_SUITE_WEP40:
		key_flags |= cpu_to_le16(STA_KEY_FLG_WEP);
		memcpy(cmd.key + 3, keyconf->key, keyconf->keylen);
		break;
2486 2487 2488 2489 2490 2491 2492
	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
2493
	default:
2494 2495
		key_flags |= cpu_to_le16(STA_KEY_FLG_EXT);
		memcpy(cmd.key, keyconf->key, keyconf->keylen);
J
Johannes Berg 已提交
2496 2497
	}

2498
	if (mcast)
J
Johannes Berg 已提交
2499 2500
		key_flags |= cpu_to_le16(STA_KEY_MULTICAST);

2501
	cmd.key_offset = key_offset;
2502
	cmd.key_flags = key_flags;
J
Johannes Berg 已提交
2503 2504 2505
	cmd.sta_id = sta_id;

	status = ADD_STA_SUCCESS;
E
Emmanuel Grumbach 已提交
2506
	if (cmd_flags & CMD_ASYNC)
2507 2508
		ret =  iwl_mvm_send_cmd_pdu(mvm, ADD_STA_KEY, CMD_ASYNC,
					    sizeof(cmd), &cmd);
E
Emmanuel Grumbach 已提交
2509 2510 2511
	else
		ret = iwl_mvm_send_cmd_pdu_status(mvm, ADD_STA_KEY, sizeof(cmd),
						  &cmd, &status);
J
Johannes Berg 已提交
2512 2513 2514 2515 2516 2517 2518 2519 2520 2521 2522 2523 2524 2525 2526 2527 2528 2529 2530 2531 2532

	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 */
2533 2534 2535 2536 2537 2538 2539 2540 2541
	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
2542 2543 2544 2545 2546 2547 2548 2549 2550 2551 2552
		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;

2553 2554 2555 2556
		switch (keyconf->cipher) {
		case WLAN_CIPHER_SUITE_AES_CMAC:
			igtk_cmd.ctrl_flags |= cpu_to_le32(STA_KEY_FLG_CCM);
			break;
2557 2558 2559 2560
		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;
2561 2562 2563 2564
		default:
			return -EINVAL;
		}

2565 2566 2567 2568
		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
2569 2570 2571 2572 2573 2574 2575 2576 2577 2578 2579 2580 2581 2582
		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);

2583 2584 2585 2586 2587 2588 2589 2590 2591 2592 2593 2594 2595
	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
2596
	return iwl_mvm_send_cmd_pdu(mvm, MGMT_MCAST_KEY, 0,
J
Johannes Berg 已提交
2597 2598 2599 2600 2601 2602 2603 2604
				    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)
{
2605
	struct iwl_mvm_vif *mvmvif = iwl_mvm_vif_from_mac80211(vif);
J
Johannes Berg 已提交
2606 2607 2608 2609 2610 2611 2612 2613 2614 2615 2616 2617 2618 2619 2620 2621

	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;
}

2622 2623 2624
static int __iwl_mvm_set_sta_key(struct iwl_mvm *mvm,
				 struct ieee80211_vif *vif,
				 struct ieee80211_sta *sta,
2625
				 struct ieee80211_key_conf *keyconf,
2626
				 u8 key_offset,
2627
				 bool mcast)
2628 2629 2630 2631 2632 2633 2634 2635 2636 2637 2638 2639 2640
{
	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);
2641
		ret = iwl_mvm_send_sta_key(mvm, mvm_sta, keyconf, mcast,
2642
					   seq.tkip.iv32, p1k, 0, key_offset);
2643 2644
		break;
	case WLAN_CIPHER_SUITE_CCMP:
2645 2646
	case WLAN_CIPHER_SUITE_WEP40:
	case WLAN_CIPHER_SUITE_WEP104:
2647 2648
	case WLAN_CIPHER_SUITE_GCMP:
	case WLAN_CIPHER_SUITE_GCMP_256:
2649
		ret = iwl_mvm_send_sta_key(mvm, mvm_sta, keyconf, mcast,
2650
					   0, NULL, 0, key_offset);
2651 2652
		break;
	default:
2653
		ret = iwl_mvm_send_sta_key(mvm, mvm_sta, keyconf, mcast,
2654
					   0, NULL, 0, key_offset);
2655 2656 2657 2658 2659 2660
	}

	return ret;
}

static int __iwl_mvm_remove_sta_key(struct iwl_mvm *mvm, u8 sta_id,
2661 2662
				    struct ieee80211_key_conf *keyconf,
				    bool mcast)
2663 2664 2665 2666 2667 2668 2669 2670 2671 2672 2673
{
	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);

2674
	if (mcast)
2675 2676 2677 2678 2679 2680 2681 2682 2683 2684 2685 2686 2687 2688 2689 2690 2691 2692 2693 2694 2695 2696 2697
		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
2698 2699 2700 2701
int iwl_mvm_set_sta_key(struct iwl_mvm *mvm,
			struct ieee80211_vif *vif,
			struct ieee80211_sta *sta,
			struct ieee80211_key_conf *keyconf,
2702
			u8 key_offset)
J
Johannes Berg 已提交
2703
{
2704
	bool mcast = !(keyconf->flags & IEEE80211_KEY_FLAG_PAIRWISE);
2705
	struct iwl_mvm_sta *mvm_sta;
2706
	u8 sta_id;
J
Johannes Berg 已提交
2707
	int ret;
2708
	static const u8 __maybe_unused zero_addr[ETH_ALEN] = {0};
J
Johannes Berg 已提交
2709 2710 2711 2712

	lockdep_assert_held(&mvm->mutex);

	/* Get the station id from the mvm local station table */
2713 2714 2715
	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
2716 2717
		return -EINVAL;
	}
2718
	sta_id = mvm_sta->sta_id;
J
Johannes Berg 已提交
2719

2720 2721 2722
	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
2723 2724 2725 2726 2727 2728 2729 2730 2731 2732 2733 2734 2735 2736 2737 2738 2739
		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;
		}
	}

2740
	if (WARN_ON_ONCE(iwl_mvm_sta_from_mac80211(sta)->vif != vif))
J
Johannes Berg 已提交
2741 2742
		return -EINVAL;

2743 2744 2745 2746 2747 2748 2749 2750 2751 2752 2753 2754 2755 2756
	/* 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
2757
			return -ENOSPC;
2758
		keyconf->hw_key_idx = key_offset;
J
Johannes Berg 已提交
2759 2760
	}

2761
	ret = __iwl_mvm_set_sta_key(mvm, vif, sta, keyconf, key_offset, mcast);
2762
	if (ret)
2763 2764 2765 2766 2767 2768 2769 2770 2771 2772
		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) {
2773 2774
		ret = __iwl_mvm_set_sta_key(mvm, vif, sta, keyconf,
					    key_offset, !mcast);
2775 2776
		if (ret) {
			__iwl_mvm_remove_sta_key(mvm, sta_id, keyconf, mcast);
2777
			goto end;
2778 2779
		}
	}
J
Johannes Berg 已提交
2780

2781 2782
	__set_bit(key_offset, mvm->fw_key_table);

J
Johannes Berg 已提交
2783 2784 2785
end:
	IWL_DEBUG_WEP(mvm, "key: cipher=%x len=%d idx=%d sta=%pM ret=%d\n",
		      keyconf->cipher, keyconf->keylen, keyconf->keyidx,
2786
		      sta ? sta->addr : zero_addr, ret);
J
Johannes Berg 已提交
2787 2788 2789 2790 2791 2792 2793 2794
	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)
{
2795
	bool mcast = !(keyconf->flags & IEEE80211_KEY_FLAG_PAIRWISE);
2796 2797
	struct iwl_mvm_sta *mvm_sta;
	u8 sta_id = IWL_MVM_STATION_COUNT;
2798
	int ret, i;
J
Johannes Berg 已提交
2799 2800 2801

	lockdep_assert_held(&mvm->mutex);

2802 2803
	/* 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
2804 2805 2806 2807

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

2808 2809 2810
	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
2811 2812
		return iwl_mvm_send_sta_igtk(mvm, keyconf, sta_id, true);

2813
	if (!__test_and_clear_bit(keyconf->hw_key_idx, mvm->fw_key_table)) {
J
Johannes Berg 已提交
2814 2815 2816 2817 2818
		IWL_ERR(mvm, "offset %d not used in fw key table.\n",
			keyconf->hw_key_idx);
		return -ENOENT;
	}

2819 2820 2821 2822 2823 2824 2825
	/* 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;

2826
	if (!mvm_sta) {
J
Johannes Berg 已提交
2827 2828 2829 2830
		IWL_DEBUG_WEP(mvm, "station non-existent, early return.\n");
		return 0;
	}

2831 2832
	sta_id = mvm_sta->sta_id;

2833 2834 2835 2836 2837 2838 2839 2840 2841 2842
	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
2843 2844 2845 2846 2847 2848 2849 2850
}

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
2851
	struct iwl_mvm_sta *mvm_sta;
2852
	bool mcast = !(keyconf->flags & IEEE80211_KEY_FLAG_PAIRWISE);
J
Johannes Berg 已提交
2853

B
Beni Lev 已提交
2854 2855
	rcu_read_lock();

2856 2857
	mvm_sta = iwl_mvm_get_key_sta(mvm, vif, sta);
	if (WARN_ON_ONCE(!mvm_sta))
2858
		goto unlock;
2859
	iwl_mvm_send_sta_key(mvm, mvm_sta, keyconf, mcast,
2860
			     iv32, phase1key, CMD_ASYNC, keyconf->hw_key_idx);
2861 2862

 unlock:
B
Beni Lev 已提交
2863
	rcu_read_unlock();
J
Johannes Berg 已提交
2864 2865
}

2866 2867
void iwl_mvm_sta_modify_ps_wake(struct iwl_mvm *mvm,
				struct ieee80211_sta *sta)
J
Johannes Berg 已提交
2868
{
2869
	struct iwl_mvm_sta *mvmsta = iwl_mvm_sta_from_mac80211(sta);
2870
	struct iwl_mvm_add_sta_cmd cmd = {
J
Johannes Berg 已提交
2871
		.add_modify = STA_MODE_MODIFY,
2872
		.sta_id = mvmsta->sta_id,
2873
		.station_flags_msk = cpu_to_le32(STA_FLG_PS),
2874
		.mac_id_n_color = cpu_to_le32(mvmsta->mac_id_n_color),
J
Johannes Berg 已提交
2875 2876 2877
	};
	int ret;

2878 2879
	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
2880 2881 2882 2883
	if (ret)
		IWL_ERR(mvm, "Failed to send ADD_STA command (%d)\n", ret);
}

2884 2885
void iwl_mvm_sta_modify_sleep_tx_count(struct iwl_mvm *mvm,
				       struct ieee80211_sta *sta,
J
Johannes Berg 已提交
2886
				       enum ieee80211_frame_release_type reason,
2887 2888
				       u16 cnt, u16 tids, bool more_data,
				       bool agg)
J
Johannes Berg 已提交
2889
{
2890
	struct iwl_mvm_sta *mvmsta = iwl_mvm_sta_from_mac80211(sta);
2891
	struct iwl_mvm_add_sta_cmd cmd = {
J
Johannes Berg 已提交
2892
		.add_modify = STA_MODE_MODIFY,
2893
		.sta_id = mvmsta->sta_id,
J
Johannes Berg 已提交
2894 2895
		.modify_mask = STA_MODIFY_SLEEPING_STA_TX_COUNT,
		.sleep_tx_count = cpu_to_le16(cnt),
2896
		.mac_id_n_color = cpu_to_le32(mvmsta->mac_id_n_color),
J
Johannes Berg 已提交
2897
	};
2898 2899 2900 2901 2902 2903 2904 2905 2906 2907 2908 2909 2910 2911 2912 2913 2914 2915 2916
	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;
2917
		int sleep_tx_count;
2918 2919 2920 2921 2922 2923 2924 2925 2926 2927 2928 2929 2930 2931 2932 2933 2934 2935 2936 2937 2938 2939 2940 2941

		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;
		}
2942 2943 2944
		sleep_tx_count = cnt - remaining;
		if (reason == IEEE80211_FRAME_RELEASE_UAPSD)
			mvmsta->sleep_tx_count = sleep_tx_count;
2945 2946
		spin_unlock_bh(&mvmsta->lock);

2947
		cmd.sleep_tx_count = cpu_to_le16(sleep_tx_count);
2948 2949 2950 2951 2952 2953 2954 2955 2956 2957 2958 2959 2960 2961 2962 2963
		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
2964

2965 2966 2967 2968 2969
	/* 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,
2970
				   iwl_mvm_add_sta_cmd_size(mvm), &cmd);
J
Johannes Berg 已提交
2971 2972 2973
	if (ret)
		IWL_ERR(mvm, "Failed to send ADD_STA command (%d)\n", ret);
}
2974

2975 2976
void iwl_mvm_rx_eosp_notif(struct iwl_mvm *mvm,
			   struct iwl_rx_cmd_buffer *rxb)
2977 2978 2979 2980 2981 2982 2983
{
	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))
2984
		return;
2985 2986 2987 2988 2989 2990 2991

	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();
}
2992 2993 2994 2995 2996 2997 2998 2999 3000 3001 3002 3003 3004

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;

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	ret = iwl_mvm_send_cmd_pdu(mvm, ADD_STA, CMD_ASYNC,
				   iwl_mvm_add_sta_cmd_size(mvm), &cmd);
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	if (ret)
		IWL_ERR(mvm, "Failed to send ADD_STA command (%d)\n", ret);
}
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void iwl_mvm_sta_modify_disable_tx_ap(struct iwl_mvm *mvm,
				      struct ieee80211_sta *sta,
				      bool disable)
{
	struct iwl_mvm_sta *mvm_sta = iwl_mvm_sta_from_mac80211(sta);

	spin_lock_bh(&mvm_sta->lock);

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

	mvm_sta->disable_tx = disable;

	/*
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Sara Sharon 已提交
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	 * Tell mac80211 to start/stop queuing tx for this station,
	 * but don't stop queuing if there are still pending frames
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	 * 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);
	}
}
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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();
}