[linux-2.6-block.git] / net / mac80211 / agg-rx.c

// SPDX-License-Identifier: GPL-2.0-only
/*
 * HT handling
 *
 * Copyright 2003, Jouni Malinen <jkmaline@cc.hut.fi>
 * Copyright 2002-2005, Instant802 Networks, Inc.
 * Copyright 2005-2006, Devicescape Software, Inc.
 * Copyright 2006-2007	Jiri Benc <jbenc@suse.cz>
 * Copyright 2007, Michael Wu <flamingice@sourmilk.net>
 * Copyright 2007-2010, Intel Corporation
 * Copyright(c) 2015-2017 Intel Deutschland GmbH
 * Copyright (C) 2018-2024 Intel Corporation
 */

/**
 * DOC: RX A-MPDU aggregation
 *
 * Aggregation on the RX side requires only implementing the
 * @ampdu_action callback that is invoked to start/stop any
 * block-ack sessions for RX aggregation.
 *
 * When RX aggregation is started by the peer, the driver is
 * notified via @ampdu_action function, with the
 * %IEEE80211_AMPDU_RX_START action, and may reject the request
 * in which case a negative response is sent to the peer, if it
 * accepts it a positive response is sent.
 *
 * While the session is active, the device/driver are required
 * to de-aggregate frames and pass them up one by one to mac80211,
 * which will handle the reorder buffer.
 *
 * When the aggregation session is stopped again by the peer or
 * ourselves, the driver's @ampdu_action function will be called
 * with the action %IEEE80211_AMPDU_RX_STOP. In this case, the
 * call must not fail.
 */

#include <linux/ieee80211.h>
#include <linux/slab.h>
#include <linux/export.h>
#include <net/mac80211.h>
#include "ieee80211_i.h"
#include "driver-ops.h"

static void ieee80211_free_tid_rx(struct rcu_head *h)
{
	struct tid_ampdu_rx *tid_rx =
		container_of(h, struct tid_ampdu_rx, rcu_head);
	int i;

	for (i = 0; i < tid_rx->buf_size; i++)
		__skb_queue_purge(&tid_rx->reorder_buf[i]);
	kfree(tid_rx->reorder_buf);
	kfree(tid_rx->reorder_time);
	kfree(tid_rx);
}

void __ieee80211_stop_rx_ba_session(struct sta_info *sta, u16 tid,
				    u16 initiator, u16 reason, bool tx)
{
	struct ieee80211_local *local = sta->local;
	struct tid_ampdu_rx *tid_rx;
	struct ieee80211_ampdu_params params = {
		.sta = &sta->sta,
		.action = IEEE80211_AMPDU_RX_STOP,
		.tid = tid,
		.amsdu = false,
		.timeout = 0,
		.ssn = 0,
	};

	lockdep_assert_wiphy(sta->local->hw.wiphy);

	tid_rx = rcu_dereference_protected(sta->ampdu_mlme.tid_rx[tid],
					lockdep_is_held(&sta->local->hw.wiphy->mtx));

	if (!test_bit(tid, sta->ampdu_mlme.agg_session_valid))
		return;

	RCU_INIT_POINTER(sta->ampdu_mlme.tid_rx[tid], NULL);
	__clear_bit(tid, sta->ampdu_mlme.agg_session_valid);

	ht_dbg(sta->sdata,
	       "Rx BA session stop requested for %pM tid %u %s reason: %d\n",
	       sta->sta.addr, tid,
	       initiator == WLAN_BACK_RECIPIENT ? "recipient" : "initiator",
	       (int)reason);

	if (drv_ampdu_action(local, sta->sdata, &params))
		sdata_info(sta->sdata,
			   "HW problem - can not stop rx aggregation for %pM tid %d\n",
			   sta->sta.addr, tid);

	/* check if this is a self generated aggregation halt */
	if (initiator == WLAN_BACK_RECIPIENT && tx)
		ieee80211_send_delba(sta->sdata, sta->sta.addr,
				     tid, WLAN_BACK_RECIPIENT, reason);

	/*
	 * return here in case tid_rx is not assigned - which will happen if
	 * IEEE80211_HW_SUPPORTS_REORDERING_BUFFER is set.
	 */
	if (!tid_rx)
		return;

	timer_delete_sync(&tid_rx->session_timer);

	/* make sure ieee80211_sta_reorder_release() doesn't re-arm the timer */
	spin_lock_bh(&tid_rx->reorder_lock);
	tid_rx->removed = true;
	spin_unlock_bh(&tid_rx->reorder_lock);
	timer_delete_sync(&tid_rx->reorder_timer);

	call_rcu(&tid_rx->rcu_head, ieee80211_free_tid_rx);
}

void ieee80211_stop_rx_ba_session(struct ieee80211_vif *vif, u16 ba_rx_bitmap,
				  const u8 *addr)
{
	struct ieee80211_sub_if_data *sdata = vif_to_sdata(vif);
	struct sta_info *sta;
	int i;

	rcu_read_lock();
	sta = sta_info_get_bss(sdata, addr);
	if (!sta) {
		rcu_read_unlock();
		return;
	}

	for (i = 0; i < IEEE80211_NUM_TIDS; i++)
		if (ba_rx_bitmap & BIT(i))
			set_bit(i, sta->ampdu_mlme.tid_rx_stop_requested);

	wiphy_work_queue(sta->local->hw.wiphy, &sta->ampdu_mlme.work);
	rcu_read_unlock();
}
EXPORT_SYMBOL(ieee80211_stop_rx_ba_session);

/*
 * After accepting the AddBA Request we activated a timer,
 * resetting it after each frame that arrives from the originator.
 */
static void sta_rx_agg_session_timer_expired(struct timer_list *t)
{
	struct tid_ampdu_rx *tid_rx = timer_container_of(tid_rx, t,
							 session_timer);
	struct sta_info *sta = tid_rx->sta;
	u8 tid = tid_rx->tid;
	unsigned long timeout;

	timeout = tid_rx->last_rx + TU_TO_JIFFIES(tid_rx->timeout);
	if (time_is_after_jiffies(timeout)) {
		mod_timer(&tid_rx->session_timer, timeout);
		return;
	}

	ht_dbg(sta->sdata, "RX session timer expired on %pM tid %d\n",
	       sta->sta.addr, tid);

	set_bit(tid, sta->ampdu_mlme.tid_rx_timer_expired);
	wiphy_work_queue(sta->local->hw.wiphy, &sta->ampdu_mlme.work);
}

static void sta_rx_agg_reorder_timer_expired(struct timer_list *t)
{
	struct tid_ampdu_rx *tid_rx = timer_container_of(tid_rx, t,
							 reorder_timer);

	rcu_read_lock();
	ieee80211_release_reorder_timeout(tid_rx->sta, tid_rx->tid);
	rcu_read_unlock();
}

void ieee80211_add_addbaext(struct sk_buff *skb,
			    const u8 req_addba_ext_data,
			    u16 buf_size)
{
	struct ieee80211_addba_ext_ie *addba_ext;
	u8 *pos;

	pos = skb_put_zero(skb, 2 + sizeof(struct ieee80211_addba_ext_ie));
	*pos++ = WLAN_EID_ADDBA_EXT;
	*pos++ = sizeof(struct ieee80211_addba_ext_ie);
	addba_ext = (struct ieee80211_addba_ext_ie *)pos;

	addba_ext->data = IEEE80211_ADDBA_EXT_NO_FRAG;
	if (req_addba_ext_data)
		addba_ext->data &= req_addba_ext_data;

	addba_ext->data |=
		u8_encode_bits(buf_size >> IEEE80211_ADDBA_EXT_BUF_SIZE_SHIFT,
			       IEEE80211_ADDBA_EXT_BUF_SIZE_MASK);
}

u8 ieee80211_retrieve_addba_ext_data(struct sta_info *sta,
				     const void *elem_data, ssize_t elem_len,
				     u16 *buf_size)
{
	struct ieee802_11_elems *elems;
	u8 buf_size_1k, data = 0;

	if (!sta->sta.deflink.he_cap.has_he)
		return 0;

	if (elem_len <= 0)
		return 0;

	elems = ieee802_11_parse_elems(elem_data, elem_len, true, NULL);

	if (!elems || elems->parse_error || !elems->addba_ext_ie)
		goto free;

	data = elems->addba_ext_ie->data;

	if (buf_size &&
	    (sta->sta.valid_links || sta->sta.deflink.eht_cap.has_eht)) {
		buf_size_1k = u8_get_bits(elems->addba_ext_ie->data,
					  IEEE80211_ADDBA_EXT_BUF_SIZE_MASK);
		*buf_size |= (u16)buf_size_1k <<
			     IEEE80211_ADDBA_EXT_BUF_SIZE_SHIFT;
	}

free:
	kfree(elems);

	return data;
}

static void ieee80211_send_addba_resp(struct sta_info *sta, u8 *da, u16 tid,
				      u8 dialog_token, u16 status, u16 policy,
				      u16 buf_size, u16 timeout,
				      const u8 req_addba_ext_data)
{
	struct ieee80211_sub_if_data *sdata = sta->sdata;
	struct ieee80211_local *local = sdata->local;
	struct sk_buff *skb;
	struct ieee80211_mgmt *mgmt;
	bool amsdu = ieee80211_hw_check(&local->hw, SUPPORTS_AMSDU_IN_AMPDU);
	u16 capab;

	skb = dev_alloc_skb(sizeof(*mgmt) +
		    2 + sizeof(struct ieee80211_addba_ext_ie) +
		    local->hw.extra_tx_headroom);
	if (!skb)
		return;

	skb_reserve(skb, local->hw.extra_tx_headroom);
	mgmt = ieee80211_mgmt_ba(skb, da, sdata);

	skb_put(skb, 1 + sizeof(mgmt->u.action.u.addba_resp));
	mgmt->u.action.category = WLAN_CATEGORY_BACK;
	mgmt->u.action.u.addba_resp.action_code = WLAN_ACTION_ADDBA_RESP;
	mgmt->u.action.u.addba_resp.dialog_token = dialog_token;

	capab = u16_encode_bits(amsdu, IEEE80211_ADDBA_PARAM_AMSDU_MASK);
	capab |= u16_encode_bits(policy, IEEE80211_ADDBA_PARAM_POLICY_MASK);
	capab |= u16_encode_bits(tid, IEEE80211_ADDBA_PARAM_TID_MASK);
	capab |= u16_encode_bits(buf_size, IEEE80211_ADDBA_PARAM_BUF_SIZE_MASK);

	mgmt->u.action.u.addba_resp.capab = cpu_to_le16(capab);
	mgmt->u.action.u.addba_resp.timeout = cpu_to_le16(timeout);
	mgmt->u.action.u.addba_resp.status = cpu_to_le16(status);

	if (sta->sta.valid_links || sta->sta.deflink.he_cap.has_he)
		ieee80211_add_addbaext(skb, req_addba_ext_data, buf_size);

	ieee80211_tx_skb(sdata, skb);
}

void __ieee80211_start_rx_ba_session(struct sta_info *sta,
				     u8 dialog_token, u16 timeout,
				     u16 start_seq_num, u16 ba_policy, u16 tid,
				     u16 buf_size, bool tx, bool auto_seq,
				     const u8 addba_ext_data)
{
	struct ieee80211_local *local = sta->sdata->local;
	struct tid_ampdu_rx *tid_agg_rx;
	struct ieee80211_ampdu_params params = {
		.sta = &sta->sta,
		.action = IEEE80211_AMPDU_RX_START,
		.tid = tid,
		.amsdu = false,
		.timeout = timeout,
		.ssn = start_seq_num,
	};
	int i, ret = -EOPNOTSUPP;
	u16 status = WLAN_STATUS_REQUEST_DECLINED;
	u16 max_buf_size;

	lockdep_assert_wiphy(sta->local->hw.wiphy);

	if (tid >= IEEE80211_FIRST_TSPEC_TSID) {
		ht_dbg(sta->sdata,
		       "STA %pM requests BA session on unsupported tid %d\n",
		       sta->sta.addr, tid);
		goto end;
	}

	if (!sta->sta.valid_links &&
	    !sta->sta.deflink.ht_cap.ht_supported &&
	    !sta->sta.deflink.he_cap.has_he) {
		ht_dbg(sta->sdata,
		       "STA %pM erroneously requests BA session on tid %d w/o HT\n",
		       sta->sta.addr, tid);
		/* send a response anyway, it's an error case if we get here */
		goto end;
	}

	if (test_sta_flag(sta, WLAN_STA_BLOCK_BA)) {
		ht_dbg(sta->sdata,
		       "Suspend in progress - Denying ADDBA request (%pM tid %d)\n",
		       sta->sta.addr, tid);
		goto end;
	}

	if (sta->sta.valid_links || sta->sta.deflink.eht_cap.has_eht)
		max_buf_size = IEEE80211_MAX_AMPDU_BUF_EHT;
	else if (sta->sta.deflink.he_cap.has_he)
		max_buf_size = IEEE80211_MAX_AMPDU_BUF_HE;
	else
		max_buf_size = IEEE80211_MAX_AMPDU_BUF_HT;

	/* sanity check for incoming parameters:
	 * check if configuration can support the BA policy
	 * and if buffer size does not exceeds max value */
	/* XXX: check own ht delayed BA capability?? */
	if (((ba_policy != 1) &&
	     (sta->sta.valid_links ||
	      !(sta->sta.deflink.ht_cap.cap & IEEE80211_HT_CAP_DELAY_BA))) ||
	    (buf_size > max_buf_size)) {
		status = WLAN_STATUS_INVALID_QOS_PARAM;
		ht_dbg_ratelimited(sta->sdata,
				   "AddBA Req with bad params from %pM on tid %u. policy %d, buffer size %d\n",
				   sta->sta.addr, tid, ba_policy, buf_size);
		goto end;
	}
	/* determine default buffer size */
	if (buf_size == 0)
		buf_size = max_buf_size;

	/* make sure the size doesn't exceed the maximum supported by the hw */
	if (buf_size > sta->sta.max_rx_aggregation_subframes)
		buf_size = sta->sta.max_rx_aggregation_subframes;
	params.buf_size = buf_size;

	ht_dbg(sta->sdata, "AddBA Req buf_size=%d for %pM\n",
	       buf_size, sta->sta.addr);

	if (test_bit(tid, sta->ampdu_mlme.agg_session_valid)) {
		if (sta->ampdu_mlme.tid_rx_token[tid] == dialog_token) {
			struct tid_ampdu_rx *tid_rx;

			ht_dbg_ratelimited(sta->sdata,
					   "updated AddBA Req from %pM on tid %u\n",
					   sta->sta.addr, tid);
			/* We have no API to update the timeout value in the
			 * driver so reject the timeout update if the timeout
			 * changed. If it did not change, i.e., no real update,
			 * just reply with success.
			 */
			rcu_read_lock();
			tid_rx = rcu_dereference(sta->ampdu_mlme.tid_rx[tid]);
			if (tid_rx && tid_rx->timeout == timeout)
				status = WLAN_STATUS_SUCCESS;
			else
				status = WLAN_STATUS_REQUEST_DECLINED;
			rcu_read_unlock();
			goto end;
		}

		ht_dbg_ratelimited(sta->sdata,
				   "unexpected AddBA Req from %pM on tid %u\n",
				   sta->sta.addr, tid);

		/* delete existing Rx BA session on the same tid */
		__ieee80211_stop_rx_ba_session(sta, tid, WLAN_BACK_RECIPIENT,
					       WLAN_STATUS_UNSPECIFIED_QOS,
					       false);
	}

	if (ieee80211_hw_check(&local->hw, SUPPORTS_REORDERING_BUFFER)) {
		ret = drv_ampdu_action(local, sta->sdata, &params);
		ht_dbg(sta->sdata,
		       "Rx A-MPDU request on %pM tid %d result %d\n",
		       sta->sta.addr, tid, ret);
		if (!ret)
			status = WLAN_STATUS_SUCCESS;
		goto end;
	}

	/* prepare A-MPDU MLME for Rx aggregation */
	tid_agg_rx = kzalloc(sizeof(*tid_agg_rx), GFP_KERNEL);
	if (!tid_agg_rx)
		goto end;

	spin_lock_init(&tid_agg_rx->reorder_lock);

	/* rx timer */
	timer_setup(&tid_agg_rx->session_timer,
		    sta_rx_agg_session_timer_expired, TIMER_DEFERRABLE);

	/* rx reorder timer */
	timer_setup(&tid_agg_rx->reorder_timer,
		    sta_rx_agg_reorder_timer_expired, 0);

	/* prepare reordering buffer */
	tid_agg_rx->reorder_buf =
		kcalloc(buf_size, sizeof(struct sk_buff_head), GFP_KERNEL);
	tid_agg_rx->reorder_time =
		kcalloc(buf_size, sizeof(unsigned long), GFP_KERNEL);
	if (!tid_agg_rx->reorder_buf || !tid_agg_rx->reorder_time) {
		kfree(tid_agg_rx->reorder_buf);
		kfree(tid_agg_rx->reorder_time);
		kfree(tid_agg_rx);
		goto end;
	}

	for (i = 0; i < buf_size; i++)
		__skb_queue_head_init(&tid_agg_rx->reorder_buf[i]);

	ret = drv_ampdu_action(local, sta->sdata, &params);
	ht_dbg(sta->sdata, "Rx A-MPDU request on %pM tid %d result %d\n",
	       sta->sta.addr, tid, ret);
	if (ret) {
		kfree(tid_agg_rx->reorder_buf);
		kfree(tid_agg_rx->reorder_time);
		kfree(tid_agg_rx);
		goto end;
	}

	/* update data */
	tid_agg_rx->ssn = start_seq_num;
	tid_agg_rx->head_seq_num = start_seq_num;
	tid_agg_rx->buf_size = buf_size;
	tid_agg_rx->timeout = timeout;
	tid_agg_rx->stored_mpdu_num = 0;
	tid_agg_rx->auto_seq = auto_seq;
	tid_agg_rx->started = false;
	tid_agg_rx->reorder_buf_filtered = 0;
	tid_agg_rx->tid = tid;
	tid_agg_rx->sta = sta;
	status = WLAN_STATUS_SUCCESS;

	/* activate it for RX */
	rcu_assign_pointer(sta->ampdu_mlme.tid_rx[tid], tid_agg_rx);

	if (timeout) {
		mod_timer(&tid_agg_rx->session_timer, TU_TO_EXP_TIME(timeout));
		tid_agg_rx->last_rx = jiffies;
	}

end:
	if (status == WLAN_STATUS_SUCCESS) {
		__set_bit(tid, sta->ampdu_mlme.agg_session_valid);
		__clear_bit(tid, sta->ampdu_mlme.unexpected_agg);
		sta->ampdu_mlme.tid_rx_token[tid] = dialog_token;
	}

	if (tx)
		ieee80211_send_addba_resp(sta, sta->sta.addr, tid,
					  dialog_token, status, 1, buf_size,
					  timeout, addba_ext_data);
}

void ieee80211_process_addba_request(struct ieee80211_local *local,
				     struct sta_info *sta,
				     struct ieee80211_mgmt *mgmt,
				     size_t len)
{
	u16 capab, tid, timeout, ba_policy, buf_size, start_seq_num;
	u8 dialog_token, addba_ext_data;

	/* extract session parameters from addba request frame */
	dialog_token = mgmt->u.action.u.addba_req.dialog_token;
	timeout = le16_to_cpu(mgmt->u.action.u.addba_req.timeout);
	start_seq_num =
		le16_to_cpu(mgmt->u.action.u.addba_req.start_seq_num) >> 4;

	capab = le16_to_cpu(mgmt->u.action.u.addba_req.capab);
	ba_policy = (capab & IEEE80211_ADDBA_PARAM_POLICY_MASK) >> 1;
	tid = (capab & IEEE80211_ADDBA_PARAM_TID_MASK) >> 2;
	buf_size = (capab & IEEE80211_ADDBA_PARAM_BUF_SIZE_MASK) >> 6;

	addba_ext_data =
		ieee80211_retrieve_addba_ext_data(sta,
						  mgmt->u.action.u.addba_req.variable,
						  len -
						  offsetof(typeof(*mgmt),
							   u.action.u.addba_req.variable),
						  &buf_size);

	__ieee80211_start_rx_ba_session(sta, dialog_token, timeout,
					start_seq_num, ba_policy, tid,
					buf_size, true, false, addba_ext_data);
}

void ieee80211_manage_rx_ba_offl(struct ieee80211_vif *vif,
				 const u8 *addr, unsigned int tid)
{
	struct ieee80211_sub_if_data *sdata = vif_to_sdata(vif);
	struct sta_info *sta;

	rcu_read_lock();
	sta = sta_info_get_bss(sdata, addr);
	if (!sta)
		goto unlock;

	set_bit(tid, sta->ampdu_mlme.tid_rx_manage_offl);
	wiphy_work_queue(sta->local->hw.wiphy, &sta->ampdu_mlme.work);
 unlock:
	rcu_read_unlock();
}
EXPORT_SYMBOL(ieee80211_manage_rx_ba_offl);

void ieee80211_rx_ba_timer_expired(struct ieee80211_vif *vif,
				   const u8 *addr, unsigned int tid)
{
	struct ieee80211_sub_if_data *sdata = vif_to_sdata(vif);
	struct sta_info *sta;

	rcu_read_lock();
	sta = sta_info_get_bss(sdata, addr);
	if (!sta)
		goto unlock;

	set_bit(tid, sta->ampdu_mlme.tid_rx_timer_expired);
	wiphy_work_queue(sta->local->hw.wiphy, &sta->ampdu_mlme.work);

 unlock:
	rcu_read_unlock();
}
EXPORT_SYMBOL(ieee80211_rx_ba_timer_expired);
Commit	Line	Data
d2912cb1	1	// SPDX-License-Identifier: GPL-2.0-only
b8695a8f JB	2	/*
	3	* HT handling
	4	*
	5	* Copyright 2003, Jouni Malinen <jkmaline@cc.hut.fi>
	6	* Copyright 2002-2005, Instant802 Networks, Inc.
	7	* Copyright 2005-2006, Devicescape Software, Inc.
	8	* Copyright 2006-2007 Jiri Benc <jbenc@suse.cz>
	9	* Copyright 2007, Michael Wu <flamingice@sourmilk.net>
a93e3644	10	* Copyright 2007-2010, Intel Corporation
04c2cf34	11	* Copyright(c) 2015-2017 Intel Deutschland GmbH
3979c8e6	12	* Copyright (C) 2018-2024 Intel Corporation
b8695a8f JB	13	*/
b8695a8f JB	14
73a72a81 JB	15	/**
	16	* DOC: RX A-MPDU aggregation
	17	*
	18	* Aggregation on the RX side requires only implementing the
	19	* @ampdu_action callback that is invoked to start/stop any
	20	* block-ack sessions for RX aggregation.
	21	*
	22	* When RX aggregation is started by the peer, the driver is
	23	* notified via @ampdu_action function, with the
	24	* %IEEE80211_AMPDU_RX_START action, and may reject the request
	25	* in which case a negative response is sent to the peer, if it
	26	* accepts it a positive response is sent.
	27	*
	28	* While the session is active, the device/driver are required
	29	* to de-aggregate frames and pass them up one by one to mac80211,
	30	* which will handle the reorder buffer.
	31	*
	32	* When the aggregation session is stopped again by the peer or
	33	* ourselves, the driver's @ampdu_action function will be called
	34	* with the action %IEEE80211_AMPDU_RX_STOP. In this case, the
	35	* call must not fail.
	36	*/
	37
b8695a8f	38	#include <linux/ieee80211.h>
5a0e3ad6	39	#include <linux/slab.h>
bc3b2d7f	40	#include <linux/export.h>
b8695a8f JB	41	#include <net/mac80211.h>
b8695a8f JB	42	#include "ieee80211_i.h"
24487981	43	#include "driver-ops.h"
b8695a8f	44
a87f736d JB	45	static void ieee80211_free_tid_rx(struct rcu_head *h)
	46	{
	47	struct tid_ampdu_rx *tid_rx =
	48	container_of(h, struct tid_ampdu_rx, rcu_head);
	49	int i;
	50
	51	for (i = 0; i < tid_rx->buf_size; i++)
83eb935e	52	__skb_queue_purge(&tid_rx->reorder_buf[i]);
a87f736d JB	53	kfree(tid_rx->reorder_buf);
	54	kfree(tid_rx->reorder_time);
	55	kfree(tid_rx);
	56	}
	57
463559b7 JB	58	void __ieee80211_stop_rx_ba_session(struct sta_info *sta, u16 tid,
463559b7 JB	59	u16 initiator, u16 reason, bool tx)
b8695a8f	60	{
d75636ef	61	struct ieee80211_local *local = sta->local;
098a6070	62	struct tid_ampdu_rx *tid_rx;
50ea05ef SS	63	struct ieee80211_ampdu_params params = {
	64	.sta = &sta->sta,
	65	.action = IEEE80211_AMPDU_RX_STOP,
	66	.tid = tid,
	67	.amsdu = false,
	68	.timeout = 0,
	69	.ssn = 0,
	70	};
b8695a8f	71
463559b7	72	lockdep_assert_wiphy(sta->local->hw.wiphy);
098a6070	73
40b275b6	74	tid_rx = rcu_dereference_protected(sta->ampdu_mlme.tid_rx[tid],
463559b7	75	lockdep_is_held(&sta->local->hw.wiphy->mtx));
a87f736d	76
412a6d80	77	if (!test_bit(tid, sta->ampdu_mlme.agg_session_valid))
b8695a8f	78	return;
d75636ef	79
a9b3cd7f	80	RCU_INIT_POINTER(sta->ampdu_mlme.tid_rx[tid], NULL);
412a6d80	81	__clear_bit(tid, sta->ampdu_mlme.agg_session_valid);
b8695a8f	82
bdcbd8e0 JB	83	ht_dbg(sta->sdata,
	84	"Rx BA session stop requested for %pM tid %u %s reason: %d\n",
	85	sta->sta.addr, tid,
09e0a2fe	86	initiator == WLAN_BACK_RECIPIENT ? "recipient" : "initiator",
bdcbd8e0	87	(int)reason);
b8695a8f	88
50ea05ef	89	if (drv_ampdu_action(local, sta->sdata, &params))
bdcbd8e0	90	sdata_info(sta->sdata,
0a214d3f JB	91	"HW problem - can not stop rx aggregation for %pM tid %d\n",
0a214d3f JB	92	sta->sta.addr, tid);
b8695a8f	93
b8695a8f	94	/* check if this is a self generated aggregation halt */
53f73c09	95	if (initiator == WLAN_BACK_RECIPIENT && tx)
d75636ef	96	ieee80211_send_delba(sta->sdata, sta->sta.addr,
a7f39f60	97	tid, WLAN_BACK_RECIPIENT, reason);
b8695a8f	98
412a6d80 SS	99	/*
	100	* return here in case tid_rx is not assigned - which will happen if
	101	* IEEE80211_HW_SUPPORTS_REORDERING_BUFFER is set.
	102	*/
	103	if (!tid_rx)
	104	return;
	105
8fa7292f	106	timer_delete_sync(&tid_rx->session_timer);
a87f736d	107
788211d8 JB	108	/* make sure ieee80211_sta_reorder_release() doesn't re-arm the timer */
	109	spin_lock_bh(&tid_rx->reorder_lock);
	110	tid_rx->removed = true;
	111	spin_unlock_bh(&tid_rx->reorder_lock);
8fa7292f	112	timer_delete_sync(&tid_rx->reorder_timer);
788211d8	113
a87f736d	114	call_rcu(&tid_rx->rcu_head, ieee80211_free_tid_rx);
b8695a8f JB	115	}
b8695a8f JB	116
f41ccd71 SL	117	void ieee80211_stop_rx_ba_session(struct ieee80211_vif *vif, u16 ba_rx_bitmap,
	118	const u8 *addr)
	119	{
	120	struct ieee80211_sub_if_data *sdata = vif_to_sdata(vif);
0a557ed3	121	struct sta_info *sta;
f41ccd71 SL	122	int i;
f41ccd71 SL	123
0a557ed3	124	rcu_read_lock();
bc192f89	125	sta = sta_info_get_bss(sdata, addr);
0a557ed3 EP	126	if (!sta) {
	127	rcu_read_unlock();
	128	return;
	129	}
	130
5a306f58	131	for (i = 0; i < IEEE80211_NUM_TIDS; i++)
f41ccd71 SL	132	if (ba_rx_bitmap & BIT(i))
	133	set_bit(i, sta->ampdu_mlme.tid_rx_stop_requested);
	134
1b672118	135	wiphy_work_queue(sta->local->hw.wiphy, &sta->ampdu_mlme.work);
0a557ed3	136	rcu_read_unlock();
f41ccd71 SL	137	}
	138	EXPORT_SYMBOL(ieee80211_stop_rx_ba_session);
	139
b8695a8f JB	140	/*
	141	* After accepting the AddBA Request we activated a timer,
	142	* resetting it after each frame that arrives from the originator.
b8695a8f	143	*/
7cca2acd	144	static void sta_rx_agg_session_timer_expired(struct timer_list *t)
b8695a8f	145	{
41cb0855 IM	146	struct tid_ampdu_rx *tid_rx = timer_container_of(tid_rx, t,
41cb0855 IM	147	session_timer);
d559e303 JB	148	struct sta_info *sta = tid_rx->sta;
d559e303 JB	149	u8 tid = tid_rx->tid;
12d3952f FF	150	unsigned long timeout;
12d3952f FF	151
12d3952f FF	152	timeout = tid_rx->last_rx + TU_TO_JIFFIES(tid_rx->timeout);
	153	if (time_is_after_jiffies(timeout)) {
	154	mod_timer(&tid_rx->session_timer, timeout);
	155	return;
	156	}
b8695a8f	157
0a214d3f	158	ht_dbg(sta->sdata, "RX session timer expired on %pM tid %d\n",
7cca2acd	159	sta->sta.addr, tid);
d63e9ae3	160
7cca2acd	161	set_bit(tid, sta->ampdu_mlme.tid_rx_timer_expired);
1b672118	162	wiphy_work_queue(sta->local->hw.wiphy, &sta->ampdu_mlme.work);
b8695a8f JB	163	}
b8695a8f JB	164
7cca2acd	165	static void sta_rx_agg_reorder_timer_expired(struct timer_list *t)
2bff8ebf	166	{
41cb0855 IM	167	struct tid_ampdu_rx *tid_rx = timer_container_of(tid_rx, t,
41cb0855 IM	168	reorder_timer);
2bff8ebf CL	169
2bff8ebf CL	170	rcu_read_lock();
7cca2acd	171	ieee80211_release_reorder_timeout(tid_rx->sta, tid_rx->tid);
2bff8ebf CL	172	rcu_read_unlock();
	173	}
	174
406c5548 MC	175	void ieee80211_add_addbaext(struct sk_buff *skb,
	176	const u8 req_addba_ext_data,
	177	u16 buf_size)
2ab45876	178	{
406c5548	179	struct ieee80211_addba_ext_ie *addba_ext;
2ab45876 JC	180	u8 *pos;
2ab45876 JC	181
2ab45876 JC	182	pos = skb_put_zero(skb, 2 + sizeof(struct ieee80211_addba_ext_ie));
	183	*pos++ = WLAN_EID_ADDBA_EXT;
	184	*pos++ = sizeof(struct ieee80211_addba_ext_ie);
406c5548	185	addba_ext = (struct ieee80211_addba_ext_ie *)pos;
2ab45876	186
406c5548 MC	187	addba_ext->data = IEEE80211_ADDBA_EXT_NO_FRAG;
	188	if (req_addba_ext_data)
	189	addba_ext->data &= req_addba_ext_data;
	190
	191	addba_ext->data \|=
	192	u8_encode_bits(buf_size >> IEEE80211_ADDBA_EXT_BUF_SIZE_SHIFT,
	193	IEEE80211_ADDBA_EXT_BUF_SIZE_MASK);
	194	}
	195
	196	u8 ieee80211_retrieve_addba_ext_data(struct sta_info *sta,
	197	const void *elem_data, ssize_t elem_len,
	198	u16 *buf_size)
	199	{
	200	struct ieee802_11_elems *elems;
	201	u8 buf_size_1k, data = 0;
	202
	203	if (!sta->sta.deflink.he_cap.has_he)
	204	return 0;
	205
	206	if (elem_len <= 0)
	207	return 0;
	208
	209	elems = ieee802_11_parse_elems(elem_data, elem_len, true, NULL);
	210
3979c8e6 JB	211	if (!elems \|\| elems->parse_error \|\| !elems->addba_ext_ie)
3979c8e6 JB	212	goto free;
406c5548	213
3979c8e6	214	data = elems->addba_ext_ie->data;
406c5548	215
3979c8e6 JB	216	if (buf_size &&
3979c8e6 JB	217	(sta->sta.valid_links \|\| sta->sta.deflink.eht_cap.has_eht)) {
406c5548 MC	218	buf_size_1k = u8_get_bits(elems->addba_ext_ie->data,
	219	IEEE80211_ADDBA_EXT_BUF_SIZE_MASK);
	220	*buf_size \|= (u16)buf_size_1k <<
	221	IEEE80211_ADDBA_EXT_BUF_SIZE_SHIFT;
	222	}
3979c8e6	223
406c5548 MC	224	free:
	225	kfree(elems);
	226
	227	return data;
2ab45876 JC	228	}
	229
	230	static void ieee80211_send_addba_resp(struct sta_info sta, u8 da, u16 tid,
b8695a8f	231	u8 dialog_token, u16 status, u16 policy,
2ab45876	232	u16 buf_size, u16 timeout,
406c5548	233	const u8 req_addba_ext_data)
b8695a8f	234	{
2ab45876	235	struct ieee80211_sub_if_data *sdata = sta->sdata;
b8695a8f JB	236	struct ieee80211_local *local = sdata->local;
	237	struct sk_buff *skb;
	238	struct ieee80211_mgmt *mgmt;
99e7ca44	239	bool amsdu = ieee80211_hw_check(&local->hw, SUPPORTS_AMSDU_IN_AMPDU);
b8695a8f JB	240	u16 capab;
b8695a8f JB	241
2ab45876 JC	242	skb = dev_alloc_skb(sizeof(*mgmt) +
	243	2 + sizeof(struct ieee80211_addba_ext_ie) +
	244	local->hw.extra_tx_headroom);
d15b8459	245	if (!skb)
b8695a8f	246	return;
b8695a8f JB	247
b8695a8f JB	248	skb_reserve(skb, local->hw.extra_tx_headroom);
ea63fb71	249	mgmt = ieee80211_mgmt_ba(skb, da, sdata);
b8695a8f JB	250
	251	skb_put(skb, 1 + sizeof(mgmt->u.action.u.addba_resp));
	252	mgmt->u.action.category = WLAN_CATEGORY_BACK;
	253	mgmt->u.action.u.addba_resp.action_code = WLAN_ACTION_ADDBA_RESP;
	254	mgmt->u.action.u.addba_resp.dialog_token = dialog_token;
	255
db8ebd06 JB	256	capab = u16_encode_bits(amsdu, IEEE80211_ADDBA_PARAM_AMSDU_MASK);
	257	capab \|= u16_encode_bits(policy, IEEE80211_ADDBA_PARAM_POLICY_MASK);
	258	capab \|= u16_encode_bits(tid, IEEE80211_ADDBA_PARAM_TID_MASK);
	259	capab \|= u16_encode_bits(buf_size, IEEE80211_ADDBA_PARAM_BUF_SIZE_MASK);
b8695a8f JB	260
	261	mgmt->u.action.u.addba_resp.capab = cpu_to_le16(capab);
	262	mgmt->u.action.u.addba_resp.timeout = cpu_to_le16(timeout);
	263	mgmt->u.action.u.addba_resp.status = cpu_to_le16(status);
	264
3979c8e6	265	if (sta->sta.valid_links \|\| sta->sta.deflink.he_cap.has_he)
406c5548	266	ieee80211_add_addbaext(skb, req_addba_ext_data, buf_size);
2ab45876	267
62ae67be	268	ieee80211_tx_skb(sdata, skb);
b8695a8f JB	269	}
b8695a8f JB	270
463559b7 JB	271	void __ieee80211_start_rx_ba_session(struct sta_info *sta,
	272	u8 dialog_token, u16 timeout,
	273	u16 start_seq_num, u16 ba_policy, u16 tid,
	274	u16 buf_size, bool tx, bool auto_seq,
406c5548	275	const u8 addba_ext_data)
b8695a8f	276	{
08cf42e8	277	struct ieee80211_local *local = sta->sdata->local;
b8695a8f	278	struct tid_ampdu_rx *tid_agg_rx;
50ea05ef SS	279	struct ieee80211_ampdu_params params = {
	280	.sta = &sta->sta,
	281	.action = IEEE80211_AMPDU_RX_START,
	282	.tid = tid,
	283	.amsdu = false,
	284	.timeout = timeout,
	285	.ssn = start_seq_num,
	286	};
83eb935e	287	int i, ret = -EOPNOTSUPP;
08cf42e8	288	u16 status = WLAN_STATUS_REQUEST_DECLINED;
41cbb0f5	289	u16 max_buf_size;
b8695a8f	290
463559b7 JB	291	lockdep_assert_wiphy(sta->local->hw.wiphy);
463559b7 JB	292
85d5313e JB	293	if (tid >= IEEE80211_FIRST_TSPEC_TSID) {
	294	ht_dbg(sta->sdata,
	295	"STA %pM requests BA session on unsupported tid %d\n",
	296	sta->sta.addr, tid);
bde59c47	297	goto end;
85d5313e JB	298	}
85d5313e JB	299
3979c8e6 JB	300	if (!sta->sta.valid_links &&
3979c8e6 JB	301	!sta->sta.deflink.ht_cap.ht_supported &&
2e82be13	302	!sta->sta.deflink.he_cap.has_he) {
8f9c77fc	303	ht_dbg(sta->sdata,
e406121e	304	"STA %pM erroneously requests BA session on tid %d w/o HT\n",
8f9c77fc JB	305	sta->sta.addr, tid);
8f9c77fc JB	306	/* send a response anyway, it's an error case if we get here */
bde59c47	307	goto end;
8f9c77fc JB	308	}
8f9c77fc JB	309
c2c98fde	310	if (test_sta_flag(sta, WLAN_STA_BLOCK_BA)) {
0a214d3f JB	311	ht_dbg(sta->sdata,
	312	"Suspend in progress - Denying ADDBA request (%pM tid %d)\n",
	313	sta->sta.addr, tid);
bde59c47	314	goto end;
722f069a S	315	}
722f069a S	316
3979c8e6	317	if (sta->sta.valid_links \|\| sta->sta.deflink.eht_cap.has_eht)
c1c5c8a2	318	max_buf_size = IEEE80211_MAX_AMPDU_BUF_EHT;
046d2e7c	319	else if (sta->sta.deflink.he_cap.has_he)
2a2c86f1	320	max_buf_size = IEEE80211_MAX_AMPDU_BUF_HE;
41cbb0f5 LC	321	else
	322	max_buf_size = IEEE80211_MAX_AMPDU_BUF_HT;
	323
b8695a8f JB	324	/* sanity check for incoming parameters:
	325	* check if configuration can support the BA policy
	326	* and if buffer size does not exceeds max value */
	327	/* XXX: check own ht delayed BA capability?? */
f64f9e71	328	if (((ba_policy != 1) &&
3979c8e6 JB	329	(sta->sta.valid_links \|\|
3979c8e6 JB	330	!(sta->sta.deflink.ht_cap.cap & IEEE80211_HT_CAP_DELAY_BA))) \|\|
41cbb0f5	331	(buf_size > max_buf_size)) {
b8695a8f	332	status = WLAN_STATUS_INVALID_QOS_PARAM;
bdcbd8e0 JB	333	ht_dbg_ratelimited(sta->sdata,
bdcbd8e0 JB	334	"AddBA Req with bad params from %pM on tid %u. policy %d, buffer size %d\n",
08cf42e8	335	sta->sta.addr, tid, ba_policy, buf_size);
bde59c47	336	goto end;
b8695a8f JB	337	}
b8695a8f JB	338	/* determine default buffer size */
82694f76	339	if (buf_size == 0)
41cbb0f5	340	buf_size = max_buf_size;
b8695a8f	341
df6ba5d8	342	/* make sure the size doesn't exceed the maximum supported by the hw */
480dd46b MA	343	if (buf_size > sta->sta.max_rx_aggregation_subframes)
480dd46b MA	344	buf_size = sta->sta.max_rx_aggregation_subframes;
50ea05ef	345	params.buf_size = buf_size;
b8695a8f	346
480dd46b MA	347	ht_dbg(sta->sdata, "AddBA Req buf_size=%d for %pM\n",
	348	buf_size, sta->sta.addr);
	349
412a6d80	350	if (test_bit(tid, sta->ampdu_mlme.agg_session_valid)) {
1c3d185a	351	if (sta->ampdu_mlme.tid_rx_token[tid] == dialog_token) {
21b7022f IP	352	struct tid_ampdu_rx *tid_rx;
21b7022f IP	353
f89e07d4 JB	354	ht_dbg_ratelimited(sta->sdata,
	355	"updated AddBA Req from %pM on tid %u\n",
	356	sta->sta.addr, tid);
	357	/* We have no API to update the timeout value in the
21b7022f	358	* driver so reject the timeout update if the timeout
39f774e7	359	* changed. If it did not change, i.e., no real update,
21b7022f	360	* just reply with success.
f89e07d4	361	*/
21b7022f IP	362	rcu_read_lock();
	363	tid_rx = rcu_dereference(sta->ampdu_mlme.tid_rx[tid]);
	364	if (tid_rx && tid_rx->timeout == timeout)
	365	status = WLAN_STATUS_SUCCESS;
	366	else
	367	status = WLAN_STATUS_REQUEST_DECLINED;
	368	rcu_read_unlock();
f89e07d4 JB	369	goto end;
	370	}
	371
bdcbd8e0 JB	372	ht_dbg_ratelimited(sta->sdata,
bdcbd8e0 JB	373	"unexpected AddBA Req from %pM on tid %u\n",
08cf42e8	374	sta->sta.addr, tid);
15b4d843 AN	375
15b4d843 AN	376	/* delete existing Rx BA session on the same tid */
463559b7 JB	377	__ieee80211_stop_rx_ba_session(sta, tid, WLAN_BACK_RECIPIENT,
	378	WLAN_STATUS_UNSPECIFIED_QOS,
	379	false);
b8695a8f JB	380	}
b8695a8f JB	381
412a6d80 SS	382	if (ieee80211_hw_check(&local->hw, SUPPORTS_REORDERING_BUFFER)) {
	383	ret = drv_ampdu_action(local, sta->sdata, &params);
	384	ht_dbg(sta->sdata,
	385	"Rx A-MPDU request on %pM tid %d result %d\n",
	386	sta->sta.addr, tid, ret);
	387	if (!ret)
	388	status = WLAN_STATUS_SUCCESS;
	389	goto end;
	390	}
	391
b8695a8f	392	/* prepare A-MPDU MLME for Rx aggregation */
f39ea269	393	tid_agg_rx = kzalloc(sizeof(*tid_agg_rx), GFP_KERNEL);
d15b8459	394	if (!tid_agg_rx)
b8695a8f	395	goto end;
b8695a8f	396
2bff8ebf CL	397	spin_lock_init(&tid_agg_rx->reorder_lock);
2bff8ebf CL	398
a87f736d	399	/* rx timer */
7cca2acd KC	400	timer_setup(&tid_agg_rx->session_timer,
7cca2acd KC	401	sta_rx_agg_session_timer_expired, TIMER_DEFERRABLE);
b8695a8f	402
2bff8ebf	403	/* rx reorder timer */
7cca2acd KC	404	timer_setup(&tid_agg_rx->reorder_timer,
7cca2acd KC	405	sta_rx_agg_reorder_timer_expired, 0);
2bff8ebf	406
b8695a8f JB	407	/* prepare reordering buffer */
b8695a8f JB	408	tid_agg_rx->reorder_buf =
83eb935e	409	kcalloc(buf_size, sizeof(struct sk_buff_head), GFP_KERNEL);
4d050f1d	410	tid_agg_rx->reorder_time =
dd318575	411	kcalloc(buf_size, sizeof(unsigned long), GFP_KERNEL);
4d050f1d	412	if (!tid_agg_rx->reorder_buf \|\| !tid_agg_rx->reorder_time) {
4d050f1d JM	413	kfree(tid_agg_rx->reorder_buf);
4d050f1d JM	414	kfree(tid_agg_rx->reorder_time);
a87f736d	415	kfree(tid_agg_rx);
b8695a8f JB	416	goto end;
	417	}
	418
83eb935e MK	419	for (i = 0; i < buf_size; i++)
	420	__skb_queue_head_init(&tid_agg_rx->reorder_buf[i]);
	421
50ea05ef	422	ret = drv_ampdu_action(local, sta->sdata, &params);
0a214d3f JB	423	ht_dbg(sta->sdata, "Rx A-MPDU request on %pM tid %d result %d\n",
0a214d3f JB	424	sta->sta.addr, tid, ret);
b8695a8f JB	425	if (ret) {
b8695a8f JB	426	kfree(tid_agg_rx->reorder_buf);
a87f736d	427	kfree(tid_agg_rx->reorder_time);
b8695a8f	428	kfree(tid_agg_rx);
b8695a8f JB	429	goto end;
	430	}
	431
a87f736d	432	/* update data */
b8695a8f JB	433	tid_agg_rx->ssn = start_seq_num;
	434	tid_agg_rx->head_seq_num = start_seq_num;
	435	tid_agg_rx->buf_size = buf_size;
	436	tid_agg_rx->timeout = timeout;
	437	tid_agg_rx->stored_mpdu_num = 0;
4549cf2b	438	tid_agg_rx->auto_seq = auto_seq;
b7540d8f	439	tid_agg_rx->started = false;
06470f74	440	tid_agg_rx->reorder_buf_filtered = 0;
7cca2acd KC	441	tid_agg_rx->tid = tid;
7cca2acd KC	442	tid_agg_rx->sta = sta;
b8695a8f	443	status = WLAN_STATUS_SUCCESS;
a87f736d JB	444
a87f736d JB	445	/* activate it for RX */
cf778b00	446	rcu_assign_pointer(sta->ampdu_mlme.tid_rx[tid], tid_agg_rx);
f955ebb4	447
12d3952f	448	if (timeout) {
f955ebb4	449	mod_timer(&tid_agg_rx->session_timer, TU_TO_EXP_TIME(timeout));
12d3952f FF	450	tid_agg_rx->last_rx = jiffies;
12d3952f FF	451	}
f955ebb4	452
b8695a8f	453	end:
bfe40fa3	454	if (status == WLAN_STATUS_SUCCESS) {
412a6d80	455	__set_bit(tid, sta->ampdu_mlme.agg_session_valid);
bfe40fa3	456	__clear_bit(tid, sta->ampdu_mlme.unexpected_agg);
1c3d185a	457	sta->ampdu_mlme.tid_rx_token[tid] = dialog_token;
bfe40fa3	458	}
b8695a8f	459
08cf42e8	460	if (tx)
2ab45876	461	ieee80211_send_addba_resp(sta, sta->sta.addr, tid,
08cf42e8	462	dialog_token, status, 1, buf_size,
406c5548	463	timeout, addba_ext_data);
08cf42e8 MK	464	}
	465
	466	void ieee80211_process_addba_request(struct ieee80211_local *local,
	467	struct sta_info *sta,
	468	struct ieee80211_mgmt *mgmt,
	469	size_t len)
	470	{
	471	u16 capab, tid, timeout, ba_policy, buf_size, start_seq_num;
406c5548	472	u8 dialog_token, addba_ext_data;
08cf42e8 MK	473
	474	/* extract session parameters from addba request frame */
	475	dialog_token = mgmt->u.action.u.addba_req.dialog_token;
	476	timeout = le16_to_cpu(mgmt->u.action.u.addba_req.timeout);
	477	start_seq_num =
	478	le16_to_cpu(mgmt->u.action.u.addba_req.start_seq_num) >> 4;
	479
	480	capab = le16_to_cpu(mgmt->u.action.u.addba_req.capab);
	481	ba_policy = (capab & IEEE80211_ADDBA_PARAM_POLICY_MASK) >> 1;
	482	tid = (capab & IEEE80211_ADDBA_PARAM_TID_MASK) >> 2;
	483	buf_size = (capab & IEEE80211_ADDBA_PARAM_BUF_SIZE_MASK) >> 6;
	484
406c5548 MC	485	addba_ext_data =
	486	ieee80211_retrieve_addba_ext_data(sta,
	487	mgmt->u.action.u.addba_req.variable,
	488	len -
	489	offsetof(typeof(*mgmt),
	490	u.action.u.addba_req.variable),
	491	&buf_size);
c1c5c8a2	492
08cf42e8 MK	493	__ieee80211_start_rx_ba_session(sta, dialog_token, timeout,
08cf42e8 MK	494	start_seq_num, ba_policy, tid,
406c5548	495	buf_size, true, false, addba_ext_data);
08cf42e8 MK	496	}
08cf42e8 MK	497
699cb58c	498	void ieee80211_manage_rx_ba_offl(struct ieee80211_vif *vif,
1272c5d8	499	const u8 *addr, unsigned int tid)
08cf42e8 MK	500	{
08cf42e8 MK	501	struct ieee80211_sub_if_data *sdata = vif_to_sdata(vif);
699cb58c	502	struct sta_info *sta;
08cf42e8	503
699cb58c JB	504	rcu_read_lock();
	505	sta = sta_info_get_bss(sdata, addr);
	506	if (!sta)
	507	goto unlock;
08cf42e8	508
1272c5d8	509	set_bit(tid, sta->ampdu_mlme.tid_rx_manage_offl);
1b672118	510	wiphy_work_queue(sta->local->hw.wiphy, &sta->ampdu_mlme.work);
699cb58c JB	511	unlock:
699cb58c JB	512	rcu_read_unlock();
b8695a8f	513	}
699cb58c	514	EXPORT_SYMBOL(ieee80211_manage_rx_ba_offl);
04c2cf34 NG	515
	516	void ieee80211_rx_ba_timer_expired(struct ieee80211_vif *vif,
	517	const u8 *addr, unsigned int tid)
	518	{
	519	struct ieee80211_sub_if_data *sdata = vif_to_sdata(vif);
04c2cf34 NG	520	struct sta_info *sta;
	521
	522	rcu_read_lock();
	523	sta = sta_info_get_bss(sdata, addr);
	524	if (!sta)
	525	goto unlock;
	526
	527	set_bit(tid, sta->ampdu_mlme.tid_rx_timer_expired);
1b672118	528	wiphy_work_queue(sta->local->hw.wiphy, &sta->ampdu_mlme.work);
04c2cf34 NG	529
	530	unlock:
	531	rcu_read_unlock();
	532	}
	533	EXPORT_SYMBOL(ieee80211_rx_ba_timer_expired);