sta.c 51.5 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,
			   bool update)
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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) {
		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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	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 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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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);
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	struct iwl_mvm_sta *mvm_sta = iwl_mvm_sta_from_mac80211(sta);
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	struct iwl_mvm_rxq_dup_data *dup_data;
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	int i, ret, sta_id;

	lockdep_assert_held(&mvm->mutex);

	if (!test_bit(IWL_MVM_STATUS_IN_HW_RESTART, &mvm->status))
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		sta_id = iwl_mvm_find_free_sta_id(mvm,
						  ieee80211_vif_type_p2p(vif));
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	else
		sta_id = mvm_sta->sta_id;

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	if (sta_id == IWL_MVM_STATION_COUNT)
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		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;
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	mvm_sta->tx_protection = 0;
	mvm_sta->tt_tx_protection = false;
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	/* HW restart, don't assume the memory has been zeroed */
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	atomic_set(&mvm->pending_frames[sta_id], 0);
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	mvm_sta->tid_disable_agg = 0xffff; /* No aggs at first */
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	mvm_sta->tfd_queue_msk = 0;
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	/* allocate new queues for a TDLS station */
	if (sta->tdls) {
		ret = iwl_mvm_tdls_sta_init(mvm, sta);
		if (ret)
			return ret;
	} else {
		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]);
	}
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	/* for HW restart - reset everything but the sequence number */
	for (i = 0; i < IWL_MAX_TID_COUNT; i++) {
		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;
	}
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	mvm_sta->agg_tids = 0;
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	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;
	}

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	ret = iwl_mvm_sta_send_to_fw(mvm, sta, false);
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	if (ret)
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		goto err;
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	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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	rcu_assign_pointer(mvm->fw_id_to_mac_id[sta_id], sta);

	return 0;
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err:
	iwl_mvm_tdls_sta_deinit(mvm, sta);
	return ret;
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}

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int iwl_mvm_update_sta(struct iwl_mvm *mvm,
		       struct ieee80211_vif *vif,
		       struct ieee80211_sta *sta)
{
	return iwl_mvm_sta_send_to_fw(mvm, sta, true);
}

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int iwl_mvm_drain_sta(struct iwl_mvm *mvm, struct iwl_mvm_sta *mvmsta,
		      bool drain)
{
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	struct iwl_mvm_add_sta_cmd cmd = {};
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	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;
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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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					  &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_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;
	}

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	ret = iwl_mvm_send_cmd_pdu(mvm, REMOVE_STA, 0,
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				   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));

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		/*
		 * 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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			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;
		}
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		RCU_INIT_POINTER(mvm->fw_id_to_mac_id[sta_id], NULL);
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		clear_bit(sta_id, mvm->sta_drained);
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		if (mvm->tfd_drained[sta_id]) {
			unsigned long i, msk = mvm->tfd_drained[sta_id];

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			for_each_set_bit(i, &msk, sizeof(msk) * BITS_PER_BYTE)
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				iwl_mvm_disable_txq(mvm, i, i,
						    IWL_MAX_TID_COUNT, 0);
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			mvm->tfd_drained[sta_id] = 0;
			IWL_DEBUG_TDLS(mvm, "Drained sta %d, with queues %ld\n",
				       sta_id, msk);
		}
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	}

	mutex_unlock(&mvm->mutex);
}

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);
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	struct iwl_mvm_sta *mvm_sta = iwl_mvm_sta_from_mac80211(sta);
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	int ret;

	lockdep_assert_held(&mvm->mutex);

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	if (iwl_mvm_has_new_rx_api(mvm))
		kfree(mvm_sta->dup_data);

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	if (vif->type == NL80211_IFTYPE_STATION &&
	    mvmvif->ap_sta_id == mvm_sta->sta_id) {
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		ret = iwl_mvm_drain_sta(mvm, mvm_sta, true);
		if (ret)
			return ret;
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		/* flush its queues here since we are freeing mvm_sta */
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		ret = iwl_mvm_flush_tx_path(mvm, mvm_sta->tfd_queue_msk, 0);
532 533 534 535 536 537 538
		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);
539

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

		/* unassoc - go ahead - remove the AP STA now */
		mvmvif->ap_sta_id = IWL_MVM_STATION_COUNT;
546 547 548 549

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

552 553 554 555 556 557 558 559 560
	/*
	 * 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);
	}

561 562 563 564 565
	/*
	 * Make sure that the tx response code sees the station as -EBUSY and
	 * calls the drain worker.
	 */
	spin_lock_bh(&mvm_sta->lock);
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	/*
	 * There are frames pending on the AC queues for this station.
	 * We need to wait until all the frames are drained...
	 */
570
	if (atomic_read(&mvm->pending_frames[mvm_sta->sta_id])) {
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		rcu_assign_pointer(mvm->fw_id_to_mac_id[mvm_sta->sta_id],
				   ERR_PTR(-EBUSY));
573
		spin_unlock_bh(&mvm_sta->lock);
574 575 576 577 578 579 580 581 582

		/* 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);
		}

583
		ret = iwl_mvm_drain_sta(mvm, mvm_sta, true);
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	} else {
585
		spin_unlock_bh(&mvm_sta->lock);
586 587 588 589

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

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		ret = iwl_mvm_rm_sta_common(mvm, mvm_sta->sta_id);
591
		RCU_INIT_POINTER(mvm->fw_id_to_mac_id[mvm_sta->sta_id], NULL);
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	}

	return ret;
}

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

	lockdep_assert_held(&mvm->mutex);

605
	RCU_INIT_POINTER(mvm->fw_id_to_mac_id[sta_id], NULL);
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	return ret;
}

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int iwl_mvm_allocate_int_sta(struct iwl_mvm *mvm,
			     struct iwl_mvm_int_sta *sta,
			     u32 qmask, enum nl80211_iftype iftype)
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{
	if (!test_bit(IWL_MVM_STATUS_IN_HW_RESTART, &mvm->status)) {
614
		sta->sta_id = iwl_mvm_find_free_sta_id(mvm, iftype);
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		if (WARN_ON_ONCE(sta->sta_id == IWL_MVM_STATION_COUNT))
			return -ENOSPC;
	}

	sta->tfd_queue_msk = qmask;

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

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static void iwl_mvm_dealloc_int_sta(struct iwl_mvm *mvm,
				    struct iwl_mvm_int_sta *sta)
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{
629
	RCU_INIT_POINTER(mvm->fw_id_to_mac_id[sta->sta_id], NULL);
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	memset(sta, 0, sizeof(struct iwl_mvm_int_sta));
	sta->sta_id = IWL_MVM_STATION_COUNT;
}

static int iwl_mvm_add_int_sta_common(struct iwl_mvm *mvm,
				      struct iwl_mvm_int_sta *sta,
				      const u8 *addr,
				      u16 mac_id, u16 color)
{
639
	struct iwl_mvm_add_sta_cmd cmd;
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	int ret;
	u32 status;

	lockdep_assert_held(&mvm->mutex);

645
	memset(&cmd, 0, sizeof(cmd));
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	cmd.sta_id = sta->sta_id;
	cmd.mac_id_n_color = cpu_to_le32(FW_CMD_ID_AND_COLOR(mac_id,
							     color));

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

656 657
	ret = iwl_mvm_send_cmd_pdu_status(mvm, ADD_STA,
					  iwl_mvm_add_sta_cmd_size(mvm),
658
					  &cmd, &status);
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	if (ret)
		return ret;

662
	switch (status & IWL_ADD_STA_STATUS_MASK) {
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	case ADD_STA_SUCCESS:
		IWL_DEBUG_INFO(mvm, "Internal station added.\n");
		return 0;
	default:
		ret = -EIO;
		IWL_ERR(mvm, "Add internal station failed, status=0x%x\n",
			status);
		break;
	}
	return ret;
}

int iwl_mvm_add_aux_sta(struct iwl_mvm *mvm)
{
677 678 679
	unsigned int wdg_timeout = iwlmvm_mod_params.tfd_q_hang_detect ?
					mvm->cfg->base_params->wd_timeout :
					IWL_WATCHDOG_DISABLED;
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	int ret;

	lockdep_assert_held(&mvm->mutex);

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	/* Map Aux queue to fifo - needs to happen before adding Aux station */
685
	iwl_mvm_enable_ac_txq(mvm, mvm->aux_queue, mvm->aux_queue,
686
			      IWL_MVM_TX_FIFO_MCAST, 0, wdg_timeout);
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	/* Allocate aux station and assign to it the aux queue */
	ret = iwl_mvm_allocate_int_sta(mvm, &mvm->aux_sta, BIT(mvm->aux_queue),
690
				       NL80211_IFTYPE_UNSPECIFIED);
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	if (ret)
		return ret;

	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;
}

702 703 704 705 706 707 708 709 710 711 712 713 714 715 716 717 718 719 720 721 722 723 724 725 726 727 728
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);
}

729 730 731 732 733 734 735
void iwl_mvm_del_aux_sta(struct iwl_mvm *mvm)
{
	lockdep_assert_held(&mvm->mutex);

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

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/*
 * Send the add station command for the vif's broadcast station.
 * Assumes that the station was already allocated.
 *
 * @mvm: the mvm component
 * @vif: the interface to which the broadcast station is added
 * @bsta: the broadcast station to add.
 */
744
int iwl_mvm_send_add_bcast_sta(struct iwl_mvm *mvm, struct ieee80211_vif *vif)
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{
	struct iwl_mvm_vif *mvmvif = iwl_mvm_vif_from_mac80211(vif);
747
	struct iwl_mvm_int_sta *bsta = &mvmvif->bcast_sta;
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	static const u8 _baddr[] = {0xFF, 0xFF, 0xFF, 0xFF, 0xFF, 0xFF};
749
	const u8 *baddr = _baddr;
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	lockdep_assert_held(&mvm->mutex);

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

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

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

/* Send the FW a request to remove the station from it's internal data
 * structures, but DO NOT remove the entry from the local data structures. */
765
int iwl_mvm_send_rm_bcast_sta(struct iwl_mvm *mvm, struct ieee80211_vif *vif)
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{
767
	struct iwl_mvm_vif *mvmvif = iwl_mvm_vif_from_mac80211(vif);
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	int ret;

	lockdep_assert_held(&mvm->mutex);

772
	ret = iwl_mvm_rm_sta_common(mvm, mvmvif->bcast_sta.sta_id);
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	if (ret)
		IWL_WARN(mvm, "Failed sending remove station\n");
	return ret;
}

778 779 780 781 782 783 784
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);
	u32 qmask;

	lockdep_assert_held(&mvm->mutex);

785
	qmask = iwl_mvm_mac_get_queues_mask(vif);
786 787 788 789 790 791 792 793 794 795 796 797 798

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

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

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/* Allocate a new station entry for the broadcast station to the given vif,
 * and send it to the FW.
 * Note that each P2P mac should have its own broadcast station.
 *
 * @mvm: the mvm component
 * @vif: the interface to which the broadcast station is added
 * @bsta: the broadcast station to add. */
806
int iwl_mvm_add_bcast_sta(struct iwl_mvm *mvm, struct ieee80211_vif *vif)
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{
	struct iwl_mvm_vif *mvmvif = iwl_mvm_vif_from_mac80211(vif);
809
	struct iwl_mvm_int_sta *bsta = &mvmvif->bcast_sta;
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	int ret;

	lockdep_assert_held(&mvm->mutex);

814
	ret = iwl_mvm_alloc_bcast_sta(mvm, vif);
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	if (ret)
		return ret;

818
	ret = iwl_mvm_send_add_bcast_sta(mvm, vif);
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	if (ret)
		iwl_mvm_dealloc_int_sta(mvm, bsta);
822

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	return ret;
}

826 827 828 829 830 831 832
void iwl_mvm_dealloc_bcast_sta(struct iwl_mvm *mvm, struct ieee80211_vif *vif)
{
	struct iwl_mvm_vif *mvmvif = iwl_mvm_vif_from_mac80211(vif);

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

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/*
 * Send the FW a request to remove the station from it's internal data
 * structures, and in addition remove it from the local data structure.
 */
837
int iwl_mvm_rm_bcast_sta(struct iwl_mvm *mvm, struct ieee80211_vif *vif)
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{
	int ret;

	lockdep_assert_held(&mvm->mutex);

843 844 845
	ret = iwl_mvm_send_rm_bcast_sta(mvm, vif);

	iwl_mvm_dealloc_bcast_sta(mvm, vif);
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	return ret;
}

850 851
#define IWL_MAX_RX_BA_SESSIONS 16

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int iwl_mvm_sta_rx_agg(struct iwl_mvm *mvm, struct ieee80211_sta *sta,
853
		       int tid, u16 ssn, bool start, u8 buf_size)
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{
855
	struct iwl_mvm_sta *mvm_sta = iwl_mvm_sta_from_mac80211(sta);
856
	struct iwl_mvm_add_sta_cmd cmd = {};
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	int ret;
	u32 status;

	lockdep_assert_held(&mvm->mutex);

862 863 864 865 866
	if (start && mvm->rx_ba_sessions >= IWL_MAX_RX_BA_SESSIONS) {
		IWL_WARN(mvm, "Not enough RX BA SESSIONS\n");
		return -ENOSPC;
	}

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	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;
870 871 872
	if (start) {
		cmd.add_immediate_ba_tid = (u8) tid;
		cmd.add_immediate_ba_ssn = cpu_to_le16(ssn);
873
		cmd.rx_ba_window = cpu_to_le16((u16)buf_size);
874 875 876
	} else {
		cmd.remove_immediate_ba_tid = (u8) tid;
	}
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	cmd.modify_mask = start ? STA_MODIFY_ADD_BA_TID :
				  STA_MODIFY_REMOVE_BA_TID;

	status = ADD_STA_SUCCESS;
881 882
	ret = iwl_mvm_send_cmd_pdu_status(mvm, ADD_STA,
					  iwl_mvm_add_sta_cmd_size(mvm),
883
					  &cmd, &status);
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	if (ret)
		return ret;

887
	switch (status & IWL_ADD_STA_STATUS_MASK) {
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	case ADD_STA_SUCCESS:
		IWL_DEBUG_INFO(mvm, "RX BA Session %sed in fw\n",
			       start ? "start" : "stopp");
		break;
	case ADD_STA_IMMEDIATE_BA_FAILURE:
		IWL_WARN(mvm, "RX BA Session refused by fw\n");
		ret = -ENOSPC;
		break;
	default:
		ret = -EIO;
		IWL_ERR(mvm, "RX BA Session failed %sing, status 0x%x\n",
			start ? "start" : "stopp", status);
		break;
	}

903 904 905 906 907 908 909 910
	if (!ret) {
		if (start)
			mvm->rx_ba_sessions++;
		else if (mvm->rx_ba_sessions > 0)
			/* check that restart flow didn't zero the counter */
			mvm->rx_ba_sessions--;
	}

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	return ret;
}

static int iwl_mvm_sta_tx_agg(struct iwl_mvm *mvm, struct ieee80211_sta *sta,
			      int tid, u8 queue, bool start)
{
917
	struct iwl_mvm_sta *mvm_sta = iwl_mvm_sta_from_mac80211(sta);
918
	struct iwl_mvm_add_sta_cmd cmd = {};
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	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 {
		mvm_sta->tfd_queue_msk &= ~BIT(queue);
		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;
940 941
	ret = iwl_mvm_send_cmd_pdu_status(mvm, ADD_STA,
					  iwl_mvm_add_sta_cmd_size(mvm),
942
					  &cmd, &status);
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	if (ret)
		return ret;

946
	switch (status & IWL_ADD_STA_STATUS_MASK) {
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	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;
}

959
const u8 tid_to_mac80211_ac[] = {
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	IEEE80211_AC_BE,
	IEEE80211_AC_BK,
	IEEE80211_AC_BK,
	IEEE80211_AC_BE,
	IEEE80211_AC_VI,
	IEEE80211_AC_VI,
	IEEE80211_AC_VO,
	IEEE80211_AC_VO,
};

970 971 972 973 974 975 976 977 978 979 980
static const u8 tid_to_ucode_ac[] = {
	AC_BE,
	AC_BK,
	AC_BK,
	AC_BE,
	AC_VI,
	AC_VI,
	AC_VO,
	AC_VO,
};

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int iwl_mvm_sta_tx_agg_start(struct iwl_mvm *mvm, struct ieee80211_vif *vif,
			     struct ieee80211_sta *sta, u16 tid, u16 *ssn)
{
984
	struct iwl_mvm_sta *mvmsta = iwl_mvm_sta_from_mac80211(sta);
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	struct iwl_mvm_tid_data *tid_data;
	int txq_id;
987
	int ret;
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	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);

1000 1001 1002 1003 1004 1005 1006 1007 1008
	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;
	}

1009 1010 1011 1012 1013 1014 1015 1016 1017 1018 1019 1020
	spin_lock_bh(&mvm->queue_info_lock);

	txq_id = iwl_mvm_find_free_queue(mvm, mvm->first_agg_queue,
					 mvm->last_agg_queue);
	if (txq_id < 0) {
		ret = txq_id;
		spin_unlock_bh(&mvm->queue_info_lock);
		IWL_ERR(mvm, "Failed to allocate agg queue\n");
		goto release_locks;
	}
	mvm->queue_info[txq_id].setup_reserved = true;
	spin_unlock_bh(&mvm->queue_info_lock);
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	tid_data = &mvmsta->tid_data[tid];
1023
	tid_data->ssn = IEEE80211_SEQ_TO_SN(tid_data->seq_number);
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	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;
	}

1039 1040 1041
	ret = 0;

release_locks:
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	spin_unlock_bh(&mvmsta->lock);

1044
	return ret;
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}

int iwl_mvm_sta_tx_agg_oper(struct iwl_mvm *mvm, struct ieee80211_vif *vif,
1048 1049
			    struct ieee80211_sta *sta, u16 tid, u8 buf_size,
			    bool amsdu)
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{
1051
	struct iwl_mvm_sta *mvmsta = iwl_mvm_sta_from_mac80211(sta);
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	struct iwl_mvm_tid_data *tid_data = &mvmsta->tid_data[tid];
1053 1054
	unsigned int wdg_timeout =
		iwl_mvm_get_wd_timeout(mvm, vif, sta->tdls, false);
1055
	int queue, ret;
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	u16 ssn;

1058 1059 1060 1061 1062 1063 1064
	struct iwl_trans_txq_scd_cfg cfg = {
		.sta_id = mvmsta->sta_id,
		.tid = tid,
		.frame_limit = buf_size,
		.aggregate = true,
	};

1065 1066 1067
	BUILD_BUG_ON((sizeof(mvmsta->agg_tids) * BITS_PER_BYTE)
		     != IWL_MAX_TID_COUNT);

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	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;
1074
	mvmsta->agg_tids |= BIT(tid);
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	tid_data->ssn = 0xffff;
1076
	tid_data->amsdu_in_ampdu_allowed = amsdu;
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	spin_unlock_bh(&mvmsta->lock);

1079
	cfg.fifo = iwl_mvm_ac_to_tx_fifo[tid_to_mac80211_ac[tid]];
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1081 1082
	iwl_mvm_enable_txq(mvm, queue, vif->hw_queue[tid_to_mac80211_ac[tid]],
			   ssn, &cfg, wdg_timeout);
1083

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

1088 1089 1090 1091 1092
	/* No need to mark as reserved */
	spin_lock_bh(&mvm->queue_info_lock);
	mvm->queue_info[queue].setup_reserved = false;
	spin_unlock_bh(&mvm->queue_info_lock);

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	/*
	 * 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;

1104 1105 1106
	IWL_DEBUG_HT(mvm, "Tx aggregation enabled on ra = %pM tid = %d\n",
		     sta->addr, tid);

1107
	return iwl_mvm_send_lq_cmd(mvm, &mvmsta->lq_sta.lq, false);
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}

int iwl_mvm_sta_tx_agg_stop(struct iwl_mvm *mvm, struct ieee80211_vif *vif,
			    struct ieee80211_sta *sta, u16 tid)
{
1113
	struct iwl_mvm_sta *mvmsta = iwl_mvm_sta_from_mac80211(sta);
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	struct iwl_mvm_tid_data *tid_data = &mvmsta->tid_data[tid];
	u16 txq_id;
	int err;

1118 1119 1120 1121 1122 1123 1124 1125 1126 1127

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

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	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);

1135 1136
	mvmsta->agg_tids &= ~BIT(tid);

1137 1138 1139 1140 1141
	/* No need to mark as reserved anymore */
	spin_lock_bh(&mvm->queue_info_lock);
	mvm->queue_info[txq_id].setup_reserved = false;
	spin_unlock_bh(&mvm->queue_info_lock);

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	switch (tid_data->state) {
	case IWL_AGG_ON:
1144
		tid_data->ssn = IEEE80211_SEQ_TO_SN(tid_data->seq_number);
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		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;
1158 1159 1160 1161 1162 1163 1164
		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);

1165 1166 1167
		iwl_mvm_disable_txq(mvm, txq_id,
				    vif->hw_queue[tid_to_mac80211_ac[tid]], tid,
				    0);
1168
		return 0;
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	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;
}

1197 1198 1199
int iwl_mvm_sta_tx_agg_flush(struct iwl_mvm *mvm, struct ieee80211_vif *vif,
			    struct ieee80211_sta *sta, u16 tid)
{
1200
	struct iwl_mvm_sta *mvmsta = iwl_mvm_sta_from_mac80211(sta);
1201 1202
	struct iwl_mvm_tid_data *tid_data = &mvmsta->tid_data[tid];
	u16 txq_id;
1203
	enum iwl_mvm_agg_state old_state;
1204 1205 1206 1207 1208 1209 1210 1211 1212

	/*
	 * 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);
1213
	old_state = tid_data->state;
1214
	tid_data->state = IWL_AGG_OFF;
1215
	mvmsta->agg_tids &= ~BIT(tid);
1216 1217
	spin_unlock_bh(&mvmsta->lock);

1218 1219 1220 1221 1222
	/* No need to mark as reserved */
	spin_lock_bh(&mvm->queue_info_lock);
	mvm->queue_info[txq_id].setup_reserved = false;
	spin_unlock_bh(&mvm->queue_info_lock);

1223
	if (old_state >= IWL_AGG_ON) {
1224
		iwl_mvm_drain_sta(mvm, mvmsta, true);
1225
		if (iwl_mvm_flush_tx_path(mvm, BIT(txq_id), 0))
1226
			IWL_ERR(mvm, "Couldn't flush the AGG queue\n");
1227 1228 1229
		iwl_trans_wait_tx_queue_empty(mvm->trans,
					      mvmsta->tfd_queue_msk);
		iwl_mvm_drain_sta(mvm, mvmsta, false);
1230

1231 1232
		iwl_mvm_sta_tx_agg(mvm, sta, tid, txq_id, false);

1233 1234 1235
		iwl_mvm_disable_txq(mvm, tid_data->txq_id,
				    vif->hw_queue[tid_to_mac80211_ac[tid]], tid,
				    0);
1236
	}
1237 1238 1239 1240

	return 0;
}

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static int iwl_mvm_set_fw_key_idx(struct iwl_mvm *mvm)
{
1243
	int i, max = -1, max_offs = -1;
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	lockdep_assert_held(&mvm->mutex);

1247 1248 1249 1250 1251 1252 1253 1254 1255 1256 1257 1258 1259 1260
	/* 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;
		}
	}
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1262
	if (max_offs < 0)
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		return STA_KEY_IDX_INVALID;

1265
	return max_offs;
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}

1268 1269 1270
static struct iwl_mvm_sta *iwl_mvm_get_key_sta(struct iwl_mvm *mvm,
					       struct ieee80211_vif *vif,
					       struct ieee80211_sta *sta)
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{
1272
	struct iwl_mvm_vif *mvmvif = iwl_mvm_vif_from_mac80211(vif);
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1274 1275
	if (sta)
		return iwl_mvm_sta_from_mac80211(sta);
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	/*
	 * 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 &&
1283 1284 1285
	    mvmvif->ap_sta_id != IWL_MVM_STATION_COUNT) {
		u8 sta_id = mvmvif->ap_sta_id;

1286 1287
		sta = rcu_dereference_check(mvm->fw_id_to_mac_id[sta_id],
					    lockdep_is_held(&mvm->mutex));
1288 1289 1290 1291 1292 1293
		/*
		 * 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.
		 */
		if (IS_ERR_OR_NULL(sta))
1294
			return NULL;
1295

1296
		return iwl_mvm_sta_from_mac80211(sta);
1297
	}
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1299
	return NULL;
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}

static int iwl_mvm_send_sta_key(struct iwl_mvm *mvm,
				struct iwl_mvm_sta *mvm_sta,
1304
				struct ieee80211_key_conf *keyconf, bool mcast,
1305 1306
				u32 tkip_iv32, u16 *tkip_p1k, u32 cmd_flags,
				u8 key_offset)
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{
1308
	struct iwl_mvm_add_sta_key_cmd cmd = {};
1309
	__le16 key_flags;
1310 1311
	int ret;
	u32 status;
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	u16 keyidx;
	int i;
1314
	u8 sta_id = mvm_sta->sta_id;
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	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);
1324
		cmd.tkip_rx_tsc_byte2 = tkip_iv32;
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		for (i = 0; i < 5; i++)
1326 1327
			cmd.tkip_rx_ttak[i] = cpu_to_le16(tkip_p1k[i]);
		memcpy(cmd.key, keyconf->key, keyconf->keylen);
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		break;
	case WLAN_CIPHER_SUITE_CCMP:
		key_flags |= cpu_to_le16(STA_KEY_FLG_CCM);
1331
		memcpy(cmd.key, keyconf->key, keyconf->keylen);
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		break;
1333 1334
	case WLAN_CIPHER_SUITE_WEP104:
		key_flags |= cpu_to_le16(STA_KEY_FLG_WEP_13BYTES);
1335
		/* fall through */
1336 1337 1338 1339
	case WLAN_CIPHER_SUITE_WEP40:
		key_flags |= cpu_to_le16(STA_KEY_FLG_WEP);
		memcpy(cmd.key + 3, keyconf->key, keyconf->keylen);
		break;
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	default:
1341 1342
		key_flags |= cpu_to_le16(STA_KEY_FLG_EXT);
		memcpy(cmd.key, keyconf->key, keyconf->keylen);
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1343 1344
	}

1345
	if (mcast)
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1346 1347
		key_flags |= cpu_to_le16(STA_KEY_MULTICAST);

1348
	cmd.key_offset = key_offset;
1349
	cmd.key_flags = key_flags;
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1350 1351 1352
	cmd.sta_id = sta_id;

	status = ADD_STA_SUCCESS;
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1353
	if (cmd_flags & CMD_ASYNC)
1354 1355
		ret =  iwl_mvm_send_cmd_pdu(mvm, ADD_STA_KEY, CMD_ASYNC,
					    sizeof(cmd), &cmd);
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1356 1357 1358
	else
		ret = iwl_mvm_send_cmd_pdu_status(mvm, ADD_STA_KEY, sizeof(cmd),
						  &cmd, &status);
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	switch (status) {
	case ADD_STA_SUCCESS:
		IWL_DEBUG_WEP(mvm, "MODIFY_STA: set dynamic key passed\n");
		break;
	default:
		ret = -EIO;
		IWL_ERR(mvm, "MODIFY_STA: set dynamic key failed\n");
		break;
	}

	return ret;
}

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

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

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

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

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

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

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	return iwl_mvm_send_cmd_pdu(mvm, MGMT_MCAST_KEY, 0,
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				    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)
{
1418
	struct iwl_mvm_vif *mvmvif = iwl_mvm_vif_from_mac80211(vif);
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	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;
}

1435 1436 1437
static int __iwl_mvm_set_sta_key(struct iwl_mvm *mvm,
				 struct ieee80211_vif *vif,
				 struct ieee80211_sta *sta,
1438
				 struct ieee80211_key_conf *keyconf,
1439
				 u8 key_offset,
1440
				 bool mcast)
1441 1442 1443 1444 1445 1446 1447 1448 1449 1450 1451 1452 1453
{
	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);
1454
		ret = iwl_mvm_send_sta_key(mvm, mvm_sta, keyconf, mcast,
1455
					   seq.tkip.iv32, p1k, 0, key_offset);
1456 1457
		break;
	case WLAN_CIPHER_SUITE_CCMP:
1458 1459 1460
	case WLAN_CIPHER_SUITE_WEP40:
	case WLAN_CIPHER_SUITE_WEP104:
		ret = iwl_mvm_send_sta_key(mvm, mvm_sta, keyconf, mcast,
1461
					   0, NULL, 0, key_offset);
1462 1463
		break;
	default:
1464
		ret = iwl_mvm_send_sta_key(mvm, mvm_sta, keyconf, mcast,
1465
					   0, NULL, 0, key_offset);
1466 1467 1468 1469 1470 1471
	}

	return ret;
}

static int __iwl_mvm_remove_sta_key(struct iwl_mvm *mvm, u8 sta_id,
1472 1473
				    struct ieee80211_key_conf *keyconf,
				    bool mcast)
1474 1475 1476 1477 1478 1479 1480 1481 1482 1483 1484
{
	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);

1485
	if (mcast)
1486 1487 1488 1489 1490 1491 1492 1493 1494 1495 1496 1497 1498 1499 1500 1501 1502 1503 1504 1505 1506 1507 1508
		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
1509 1510 1511 1512
int iwl_mvm_set_sta_key(struct iwl_mvm *mvm,
			struct ieee80211_vif *vif,
			struct ieee80211_sta *sta,
			struct ieee80211_key_conf *keyconf,
1513
			u8 key_offset)
J
Johannes Berg 已提交
1514
{
1515
	bool mcast = !(keyconf->flags & IEEE80211_KEY_FLAG_PAIRWISE);
1516
	struct iwl_mvm_sta *mvm_sta;
1517
	u8 sta_id;
J
Johannes Berg 已提交
1518
	int ret;
1519
	static const u8 __maybe_unused zero_addr[ETH_ALEN] = {0};
J
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1520 1521 1522 1523

	lockdep_assert_held(&mvm->mutex);

	/* Get the station id from the mvm local station table */
1524 1525 1526
	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
1527 1528
		return -EINVAL;
	}
1529
	sta_id = mvm_sta->sta_id;
J
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1530 1531 1532 1533 1534 1535 1536 1537 1538 1539 1540 1541 1542 1543 1544 1545 1546 1547 1548

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

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

1549
	if (WARN_ON_ONCE(iwl_mvm_sta_from_mac80211(sta)->vif != vif))
J
Johannes Berg 已提交
1550 1551
		return -EINVAL;

1552 1553 1554 1555 1556 1557 1558 1559 1560 1561 1562 1563 1564 1565
	/* 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
1566
			return -ENOSPC;
1567
		keyconf->hw_key_idx = key_offset;
J
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1568 1569
	}

1570
	ret = __iwl_mvm_set_sta_key(mvm, vif, sta, keyconf, key_offset, mcast);
1571
	if (ret)
1572 1573 1574 1575 1576 1577 1578 1579 1580 1581
		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) {
1582 1583
		ret = __iwl_mvm_set_sta_key(mvm, vif, sta, keyconf,
					    key_offset, !mcast);
1584 1585
		if (ret) {
			__iwl_mvm_remove_sta_key(mvm, sta_id, keyconf, mcast);
1586
			goto end;
1587 1588
		}
	}
J
Johannes Berg 已提交
1589

1590 1591
	__set_bit(key_offset, mvm->fw_key_table);

J
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1592 1593 1594
end:
	IWL_DEBUG_WEP(mvm, "key: cipher=%x len=%d idx=%d sta=%pM ret=%d\n",
		      keyconf->cipher, keyconf->keylen, keyconf->keyidx,
1595
		      sta ? sta->addr : zero_addr, ret);
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1596 1597 1598 1599 1600 1601 1602 1603
	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)
{
1604
	bool mcast = !(keyconf->flags & IEEE80211_KEY_FLAG_PAIRWISE);
1605 1606
	struct iwl_mvm_sta *mvm_sta;
	u8 sta_id = IWL_MVM_STATION_COUNT;
1607
	int ret, i;
J
Johannes Berg 已提交
1608 1609 1610

	lockdep_assert_held(&mvm->mutex);

1611 1612
	/* Get the station from the mvm local station table */
	mvm_sta = iwl_mvm_get_key_sta(mvm, vif, sta);
J
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1613 1614 1615 1616 1617 1618 1619

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

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

1620
	if (!__test_and_clear_bit(keyconf->hw_key_idx, mvm->fw_key_table)) {
J
Johannes Berg 已提交
1621 1622 1623 1624 1625
		IWL_ERR(mvm, "offset %d not used in fw key table.\n",
			keyconf->hw_key_idx);
		return -ENOENT;
	}

1626 1627 1628 1629 1630 1631 1632
	/* 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;

1633
	if (!mvm_sta) {
J
Johannes Berg 已提交
1634 1635 1636 1637
		IWL_DEBUG_WEP(mvm, "station non-existent, early return.\n");
		return 0;
	}

1638 1639
	sta_id = mvm_sta->sta_id;

1640 1641 1642 1643 1644 1645 1646 1647 1648 1649
	ret = __iwl_mvm_remove_sta_key(mvm, sta_id, keyconf, mcast);
	if (ret)
		return ret;

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

	return ret;
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1650 1651 1652 1653 1654 1655 1656 1657
}

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
1658
	struct iwl_mvm_sta *mvm_sta;
1659
	bool mcast = !(keyconf->flags & IEEE80211_KEY_FLAG_PAIRWISE);
J
Johannes Berg 已提交
1660

B
Beni Lev 已提交
1661 1662
	rcu_read_lock();

1663 1664
	mvm_sta = iwl_mvm_get_key_sta(mvm, vif, sta);
	if (WARN_ON_ONCE(!mvm_sta))
1665
		goto unlock;
1666
	iwl_mvm_send_sta_key(mvm, mvm_sta, keyconf, mcast,
1667
			     iv32, phase1key, CMD_ASYNC, keyconf->hw_key_idx);
1668 1669

 unlock:
B
Beni Lev 已提交
1670
	rcu_read_unlock();
J
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1671 1672
}

1673 1674
void iwl_mvm_sta_modify_ps_wake(struct iwl_mvm *mvm,
				struct ieee80211_sta *sta)
J
Johannes Berg 已提交
1675
{
1676
	struct iwl_mvm_sta *mvmsta = iwl_mvm_sta_from_mac80211(sta);
1677
	struct iwl_mvm_add_sta_cmd cmd = {
J
Johannes Berg 已提交
1678
		.add_modify = STA_MODE_MODIFY,
1679
		.sta_id = mvmsta->sta_id,
1680
		.station_flags_msk = cpu_to_le32(STA_FLG_PS),
1681
		.mac_id_n_color = cpu_to_le32(mvmsta->mac_id_n_color),
J
Johannes Berg 已提交
1682 1683 1684
	};
	int ret;

1685 1686
	ret = iwl_mvm_send_cmd_pdu(mvm, ADD_STA, CMD_ASYNC,
				   iwl_mvm_add_sta_cmd_size(mvm), &cmd);
J
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1687 1688 1689 1690
	if (ret)
		IWL_ERR(mvm, "Failed to send ADD_STA command (%d)\n", ret);
}

1691 1692
void iwl_mvm_sta_modify_sleep_tx_count(struct iwl_mvm *mvm,
				       struct ieee80211_sta *sta,
J
Johannes Berg 已提交
1693
				       enum ieee80211_frame_release_type reason,
1694 1695
				       u16 cnt, u16 tids, bool more_data,
				       bool agg)
J
Johannes Berg 已提交
1696
{
1697
	struct iwl_mvm_sta *mvmsta = iwl_mvm_sta_from_mac80211(sta);
1698
	struct iwl_mvm_add_sta_cmd cmd = {
J
Johannes Berg 已提交
1699
		.add_modify = STA_MODE_MODIFY,
1700
		.sta_id = mvmsta->sta_id,
J
Johannes Berg 已提交
1701 1702
		.modify_mask = STA_MODIFY_SLEEPING_STA_TX_COUNT,
		.sleep_tx_count = cpu_to_le16(cnt),
1703
		.mac_id_n_color = cpu_to_le32(mvmsta->mac_id_n_color),
J
Johannes Berg 已提交
1704
	};
1705 1706 1707 1708 1709 1710 1711 1712 1713 1714 1715 1716 1717 1718 1719 1720 1721 1722 1723
	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;
1724
		int sleep_tx_count;
1725 1726 1727 1728 1729 1730 1731 1732 1733 1734 1735 1736 1737 1738 1739 1740 1741 1742 1743 1744 1745 1746 1747 1748

		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;
		}
1749 1750 1751
		sleep_tx_count = cnt - remaining;
		if (reason == IEEE80211_FRAME_RELEASE_UAPSD)
			mvmsta->sleep_tx_count = sleep_tx_count;
1752 1753
		spin_unlock_bh(&mvmsta->lock);

1754
		cmd.sleep_tx_count = cpu_to_le16(sleep_tx_count);
1755 1756 1757 1758 1759 1760 1761 1762 1763 1764 1765 1766 1767 1768 1769 1770
		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
1771

1772 1773 1774 1775 1776
	/* 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,
1777
				   iwl_mvm_add_sta_cmd_size(mvm), &cmd);
J
Johannes Berg 已提交
1778 1779 1780
	if (ret)
		IWL_ERR(mvm, "Failed to send ADD_STA command (%d)\n", ret);
}
1781

1782 1783
void iwl_mvm_rx_eosp_notif(struct iwl_mvm *mvm,
			   struct iwl_rx_cmd_buffer *rxb)
1784 1785 1786 1787 1788 1789 1790
{
	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))
1791
		return;
1792 1793 1794 1795 1796 1797 1798

	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();
}
1799 1800 1801 1802 1803 1804 1805 1806 1807 1808 1809 1810 1811

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;

1812 1813
	ret = iwl_mvm_send_cmd_pdu(mvm, ADD_STA, CMD_ASYNC,
				   iwl_mvm_add_sta_cmd_size(mvm), &cmd);
1814 1815 1816
	if (ret)
		IWL_ERR(mvm, "Failed to send ADD_STA command (%d)\n", ret);
}
1817 1818 1819 1820 1821 1822 1823 1824 1825 1826 1827 1828 1829 1830 1831 1832 1833

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

	spin_lock_bh(&mvm_sta->lock);

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

	mvm_sta->disable_tx = disable;

	/*
S
Sara Sharon 已提交
1834 1835
	 * Tell mac80211 to start/stop queuing tx for this station,
	 * but don't stop queuing if there are still pending frames
1836 1837 1838 1839 1840 1841 1842 1843 1844 1845 1846 1847 1848 1849 1850 1851 1852 1853 1854 1855 1856 1857 1858 1859 1860 1861 1862 1863 1864 1865 1866 1867 1868 1869 1870
	 * 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);
	}
}
1871 1872 1873 1874 1875 1876 1877 1878 1879 1880 1881 1882 1883 1884 1885

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();
}