[linux-block.git] / net / mac80211 / ht.c

/*
 * 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
 *
 * This program is free software; you can redistribute it and/or modify
 * it under the terms of the GNU General Public License version 2 as
 * published by the Free Software Foundation.
 */

#include <linux/ieee80211.h>
#include <net/mac80211.h>
#include "ieee80211_i.h"
#include "rate.h"

void ieee80211_ht_cap_ie_to_sta_ht_cap(struct ieee80211_supported_band *sband,
				       struct ieee80211_ht_cap *ht_cap_ie,
				       struct ieee80211_sta_ht_cap *ht_cap)
{
	u8 ampdu_info, tx_mcs_set_cap;
	int i, max_tx_streams;

	BUG_ON(!ht_cap);

	memset(ht_cap, 0, sizeof(*ht_cap));

	if (!ht_cap_ie || !sband->ht_cap.ht_supported)
		return;

	ht_cap->ht_supported = true;

	/*
	 * The bits listed in this expression should be
	 * the same for the peer and us, if the station
	 * advertises more then we can't use those thus
	 * we mask them out.
	 */
	ht_cap->cap = le16_to_cpu(ht_cap_ie->cap_info) &
		(sband->ht_cap.cap |
		 ~(IEEE80211_HT_CAP_LDPC_CODING |
		   IEEE80211_HT_CAP_SUP_WIDTH_20_40 |
		   IEEE80211_HT_CAP_GRN_FLD |
		   IEEE80211_HT_CAP_SGI_20 |
		   IEEE80211_HT_CAP_SGI_40 |
		   IEEE80211_HT_CAP_DSSSCCK40));
	/*
	 * The STBC bits are asymmetric -- if we don't have
	 * TX then mask out the peer's RX and vice versa.
	 */
	if (!(sband->ht_cap.cap & IEEE80211_HT_CAP_TX_STBC))
		ht_cap->cap &= ~IEEE80211_HT_CAP_RX_STBC;
	if (!(sband->ht_cap.cap & IEEE80211_HT_CAP_RX_STBC))
		ht_cap->cap &= ~IEEE80211_HT_CAP_TX_STBC;

	ampdu_info = ht_cap_ie->ampdu_params_info;
	ht_cap->ampdu_factor =
		ampdu_info & IEEE80211_HT_AMPDU_PARM_FACTOR;
	ht_cap->ampdu_density =
		(ampdu_info & IEEE80211_HT_AMPDU_PARM_DENSITY) >> 2;

	/* own MCS TX capabilities */
	tx_mcs_set_cap = sband->ht_cap.mcs.tx_params;

	/* Copy peer MCS TX capabilities, the driver might need them. */
	ht_cap->mcs.tx_params = ht_cap_ie->mcs.tx_params;

	/* can we TX with MCS rates? */
	if (!(tx_mcs_set_cap & IEEE80211_HT_MCS_TX_DEFINED))
		return;

	/* Counting from 0, therefore +1 */
	if (tx_mcs_set_cap & IEEE80211_HT_MCS_TX_RX_DIFF)
		max_tx_streams =
			((tx_mcs_set_cap & IEEE80211_HT_MCS_TX_MAX_STREAMS_MASK)
				>> IEEE80211_HT_MCS_TX_MAX_STREAMS_SHIFT) + 1;
	else
		max_tx_streams = IEEE80211_HT_MCS_TX_MAX_STREAMS;

	/*
	 * 802.11n-2009 20.3.5 / 20.6 says:
	 * - indices 0 to 7 and 32 are single spatial stream
	 * - 8 to 31 are multiple spatial streams using equal modulation
	 *   [8..15 for two streams, 16..23 for three and 24..31 for four]
	 * - remainder are multiple spatial streams using unequal modulation
	 */
	for (i = 0; i < max_tx_streams; i++)
		ht_cap->mcs.rx_mask[i] =
			sband->ht_cap.mcs.rx_mask[i] & ht_cap_ie->mcs.rx_mask[i];

	if (tx_mcs_set_cap & IEEE80211_HT_MCS_TX_UNEQUAL_MODULATION)
		for (i = IEEE80211_HT_MCS_UNEQUAL_MODULATION_START_BYTE;
		     i < IEEE80211_HT_MCS_MASK_LEN; i++)
			ht_cap->mcs.rx_mask[i] =
				sband->ht_cap.mcs.rx_mask[i] &
					ht_cap_ie->mcs.rx_mask[i];

	/* handle MCS rate 32 too */
	if (sband->ht_cap.mcs.rx_mask[32/8] & ht_cap_ie->mcs.rx_mask[32/8] & 1)
		ht_cap->mcs.rx_mask[32/8] |= 1;
}

void ieee80211_sta_tear_down_BA_sessions(struct sta_info *sta, bool tx)
{
	int i;

	cancel_work_sync(&sta->ampdu_mlme.work);

	for (i = 0; i <  STA_TID_NUM; i++) {
		__ieee80211_stop_tx_ba_session(sta, i, WLAN_BACK_INITIATOR, tx);
		__ieee80211_stop_rx_ba_session(sta, i, WLAN_BACK_RECIPIENT,
					       WLAN_REASON_QSTA_LEAVE_QBSS, tx);
	}
}

void ieee80211_ba_session_work(struct work_struct *work)
{
	struct sta_info *sta =
		container_of(work, struct sta_info, ampdu_mlme.work);
	struct tid_ampdu_tx *tid_tx;
	int tid;

	/*
	 * When this flag is set, new sessions should be
	 * blocked, and existing sessions will be torn
	 * down by the code that set the flag, so this
	 * need not run.
	 */
	if (test_sta_flags(sta, WLAN_STA_BLOCK_BA))
		return;

	mutex_lock(&sta->ampdu_mlme.mtx);
	for (tid = 0; tid < STA_TID_NUM; tid++) {
		if (test_and_clear_bit(tid, sta->ampdu_mlme.tid_rx_timer_expired))
			___ieee80211_stop_rx_ba_session(
				sta, tid, WLAN_BACK_RECIPIENT,
				WLAN_REASON_QSTA_TIMEOUT, true);

		tid_tx = sta->ampdu_mlme.tid_start_tx[tid];
		if (tid_tx) {
			/*
			 * Assign it over to the normal tid_tx array
			 * where it "goes live".
			 */
			spin_lock_bh(&sta->lock);

			sta->ampdu_mlme.tid_start_tx[tid] = NULL;
			/* could there be a race? */
			if (sta->ampdu_mlme.tid_tx[tid])
				kfree(tid_tx);
			else
				ieee80211_assign_tid_tx(sta, tid, tid_tx);
			spin_unlock_bh(&sta->lock);

			ieee80211_tx_ba_session_handle_start(sta, tid);
			continue;
		}

		tid_tx = rcu_dereference_protected_tid_tx(sta, tid);
		if (tid_tx && test_and_clear_bit(HT_AGG_STATE_WANT_STOP,
						 &tid_tx->state))
			___ieee80211_stop_tx_ba_session(sta, tid,
							WLAN_BACK_INITIATOR,
							true);
	}
	mutex_unlock(&sta->ampdu_mlme.mtx);
}

void ieee80211_send_delba(struct ieee80211_sub_if_data *sdata,
			  const u8 *da, u16 tid,
			  u16 initiator, u16 reason_code)
{
	struct ieee80211_local *local = sdata->local;
	struct sk_buff *skb;
	struct ieee80211_mgmt *mgmt;
	u16 params;

	skb = dev_alloc_skb(sizeof(*mgmt) + local->hw.extra_tx_headroom);

	if (!skb) {
		printk(KERN_ERR "%s: failed to allocate buffer "
					"for delba frame\n", sdata->name);
		return;
	}

	skb_reserve(skb, local->hw.extra_tx_headroom);
	mgmt = (struct ieee80211_mgmt *) skb_put(skb, 24);
	memset(mgmt, 0, 24);
	memcpy(mgmt->da, da, ETH_ALEN);
	memcpy(mgmt->sa, sdata->vif.addr, ETH_ALEN);
	if (sdata->vif.type == NL80211_IFTYPE_AP ||
	    sdata->vif.type == NL80211_IFTYPE_AP_VLAN)
		memcpy(mgmt->bssid, sdata->vif.addr, ETH_ALEN);
	else if (sdata->vif.type == NL80211_IFTYPE_STATION)
		memcpy(mgmt->bssid, sdata->u.mgd.bssid, ETH_ALEN);

	mgmt->frame_control = cpu_to_le16(IEEE80211_FTYPE_MGMT |
					  IEEE80211_STYPE_ACTION);

	skb_put(skb, 1 + sizeof(mgmt->u.action.u.delba));

	mgmt->u.action.category = WLAN_CATEGORY_BACK;
	mgmt->u.action.u.delba.action_code = WLAN_ACTION_DELBA;
	params = (u16)(initiator << 11); 	/* bit 11 initiator */
	params |= (u16)(tid << 12); 		/* bit 15:12 TID number */

	mgmt->u.action.u.delba.params = cpu_to_le16(params);
	mgmt->u.action.u.delba.reason_code = cpu_to_le16(reason_code);

	ieee80211_tx_skb(sdata, skb);
}

void ieee80211_process_delba(struct ieee80211_sub_if_data *sdata,
			     struct sta_info *sta,
			     struct ieee80211_mgmt *mgmt, size_t len)
{
	u16 tid, params;
	u16 initiator;

	params = le16_to_cpu(mgmt->u.action.u.delba.params);
	tid = (params & IEEE80211_DELBA_PARAM_TID_MASK) >> 12;
	initiator = (params & IEEE80211_DELBA_PARAM_INITIATOR_MASK) >> 11;

#ifdef CONFIG_MAC80211_HT_DEBUG
	if (net_ratelimit())
		printk(KERN_DEBUG "delba from %pM (%s) tid %d reason code %d\n",
			mgmt->sa, initiator ? "initiator" : "recipient", tid,
			le16_to_cpu(mgmt->u.action.u.delba.reason_code));
#endif /* CONFIG_MAC80211_HT_DEBUG */

	if (initiator == WLAN_BACK_INITIATOR)
		__ieee80211_stop_rx_ba_session(sta, tid, WLAN_BACK_INITIATOR, 0,
					       true);
	else
		__ieee80211_stop_tx_ba_session(sta, tid, WLAN_BACK_RECIPIENT,
					       true);
}

int ieee80211_send_smps_action(struct ieee80211_sub_if_data *sdata,
			       enum ieee80211_smps_mode smps, const u8 *da,
			       const u8 *bssid)
{
	struct ieee80211_local *local = sdata->local;
	struct sk_buff *skb;
	struct ieee80211_mgmt *action_frame;

	/* 27 = header + category + action + smps mode */
	skb = dev_alloc_skb(27 + local->hw.extra_tx_headroom);
	if (!skb)
		return -ENOMEM;

	skb_reserve(skb, local->hw.extra_tx_headroom);
	action_frame = (void *)skb_put(skb, 27);
	memcpy(action_frame->da, da, ETH_ALEN);
	memcpy(action_frame->sa, sdata->dev->dev_addr, ETH_ALEN);
	memcpy(action_frame->bssid, bssid, ETH_ALEN);
	action_frame->frame_control = cpu_to_le16(IEEE80211_FTYPE_MGMT |
						  IEEE80211_STYPE_ACTION);
	action_frame->u.action.category = WLAN_CATEGORY_HT;
	action_frame->u.action.u.ht_smps.action = WLAN_HT_ACTION_SMPS;
	switch (smps) {
	case IEEE80211_SMPS_AUTOMATIC:
	case IEEE80211_SMPS_NUM_MODES:
		WARN_ON(1);
	case IEEE80211_SMPS_OFF:
		action_frame->u.action.u.ht_smps.smps_control =
				WLAN_HT_SMPS_CONTROL_DISABLED;
		break;
	case IEEE80211_SMPS_STATIC:
		action_frame->u.action.u.ht_smps.smps_control =
				WLAN_HT_SMPS_CONTROL_STATIC;
		break;
	case IEEE80211_SMPS_DYNAMIC:
		action_frame->u.action.u.ht_smps.smps_control =
				WLAN_HT_SMPS_CONTROL_DYNAMIC;
		break;
	}

	/* we'll do more on status of this frame */
	IEEE80211_SKB_CB(skb)->flags |= IEEE80211_TX_CTL_REQ_TX_STATUS;
	ieee80211_tx_skb(sdata, skb);

	return 0;
}

void ieee80211_request_smps_work(struct work_struct *work)
{
	struct ieee80211_sub_if_data *sdata =
		container_of(work, struct ieee80211_sub_if_data,
			     u.mgd.request_smps_work);

	mutex_lock(&sdata->u.mgd.mtx);
	__ieee80211_request_smps(sdata, sdata->u.mgd.driver_smps_mode);
	mutex_unlock(&sdata->u.mgd.mtx);
}

void ieee80211_request_smps(struct ieee80211_vif *vif,
			    enum ieee80211_smps_mode smps_mode)
{
	struct ieee80211_sub_if_data *sdata = vif_to_sdata(vif);

	if (WARN_ON(vif->type != NL80211_IFTYPE_STATION))
		return;

	if (WARN_ON(smps_mode == IEEE80211_SMPS_OFF))
		smps_mode = IEEE80211_SMPS_AUTOMATIC;

	sdata->u.mgd.driver_smps_mode = smps_mode;

	ieee80211_queue_work(&sdata->local->hw,
			     &sdata->u.mgd.request_smps_work);
}
/* this might change ... don't want non-open drivers using it */
EXPORT_SYMBOL_GPL(ieee80211_request_smps);
Commit	Line	Data
44d414db JB	1	/*
	2	* HT handling
	3	*
	4	* Copyright 2003, Jouni Malinen <jkmaline@cc.hut.fi>
bacac545 JB	5	* Copyright 2002-2005, Instant802 Networks, Inc.
bacac545 JB	6	* Copyright 2005-2006, Devicescape Software, Inc.
44d414db JB	7	* Copyright 2006-2007 Jiri Benc <jbenc@suse.cz>
44d414db JB	8	* Copyright 2007, Michael Wu <flamingice@sourmilk.net>
cfcdbde3	9	* Copyright 2007-2010, Intel Corporation
44d414db JB	10	*
	11	* This program is free software; you can redistribute it and/or modify
	12	* it under the terms of the GNU General Public License version 2 as
	13	* published by the Free Software Foundation.
	14	*/
	15
	16	#include <linux/ieee80211.h>
44d414db JB	17	#include <net/mac80211.h>
44d414db JB	18	#include "ieee80211_i.h"
81cb7623	19	#include "rate.h"
44d414db	20
ae5eb026 JB	21	void ieee80211_ht_cap_ie_to_sta_ht_cap(struct ieee80211_supported_band *sband,
ae5eb026 JB	22	struct ieee80211_ht_cap *ht_cap_ie,
d9fe60de	23	struct ieee80211_sta_ht_cap *ht_cap)
44d414db	24	{
ae5eb026 JB	25	u8 ampdu_info, tx_mcs_set_cap;
ae5eb026 JB	26	int i, max_tx_streams;
44d414db	27
d9fe60de	28	BUG_ON(!ht_cap);
44d414db	29
d9fe60de	30	memset(ht_cap, 0, sizeof(*ht_cap));
44d414db	31
15804e3e	32	if (!ht_cap_ie \|\| !sband->ht_cap.ht_supported)
ae5eb026	33	return;
d9fe60de	34
ae5eb026	35	ht_cap->ht_supported = true;
d9fe60de	36
9a418af5 JB	37	/*
	38	* The bits listed in this expression should be
	39	* the same for the peer and us, if the station
	40	* advertises more then we can't use those thus
	41	* we mask them out.
	42	*/
	43	ht_cap->cap = le16_to_cpu(ht_cap_ie->cap_info) &
	44	(sband->ht_cap.cap \|
	45	~(IEEE80211_HT_CAP_LDPC_CODING \|
	46	IEEE80211_HT_CAP_SUP_WIDTH_20_40 \|
	47	IEEE80211_HT_CAP_GRN_FLD \|
	48	IEEE80211_HT_CAP_SGI_20 \|
	49	IEEE80211_HT_CAP_SGI_40 \|
	50	IEEE80211_HT_CAP_DSSSCCK40));
	51	/*
	52	* The STBC bits are asymmetric -- if we don't have
	53	* TX then mask out the peer's RX and vice versa.
	54	*/
	55	if (!(sband->ht_cap.cap & IEEE80211_HT_CAP_TX_STBC))
	56	ht_cap->cap &= ~IEEE80211_HT_CAP_RX_STBC;
	57	if (!(sband->ht_cap.cap & IEEE80211_HT_CAP_RX_STBC))
	58	ht_cap->cap &= ~IEEE80211_HT_CAP_TX_STBC;
d9fe60de	59
ae5eb026 JB	60	ampdu_info = ht_cap_ie->ampdu_params_info;
	61	ht_cap->ampdu_factor =
	62	ampdu_info & IEEE80211_HT_AMPDU_PARM_FACTOR;
	63	ht_cap->ampdu_density =
	64	(ampdu_info & IEEE80211_HT_AMPDU_PARM_DENSITY) >> 2;
44d414db	65
d9fe60de JB	66	/* own MCS TX capabilities */
	67	tx_mcs_set_cap = sband->ht_cap.mcs.tx_params;
	68
90b4ca9d JB	69	/* Copy peer MCS TX capabilities, the driver might need them. */
	70	ht_cap->mcs.tx_params = ht_cap_ie->mcs.tx_params;
	71
d9fe60de JB	72	/* can we TX with MCS rates? */
d9fe60de JB	73	if (!(tx_mcs_set_cap & IEEE80211_HT_MCS_TX_DEFINED))
ae5eb026	74	return;
d9fe60de JB	75
	76	/* Counting from 0, therefore +1 */
	77	if (tx_mcs_set_cap & IEEE80211_HT_MCS_TX_RX_DIFF)
	78	max_tx_streams =
	79	((tx_mcs_set_cap & IEEE80211_HT_MCS_TX_MAX_STREAMS_MASK)
	80	>> IEEE80211_HT_MCS_TX_MAX_STREAMS_SHIFT) + 1;
	81	else
	82	max_tx_streams = IEEE80211_HT_MCS_TX_MAX_STREAMS;
	83
	84	/*
90b4ca9d	85	* 802.11n-2009 20.3.5 / 20.6 says:
d9fe60de JB	86	* - indices 0 to 7 and 32 are single spatial stream
	87	* - 8 to 31 are multiple spatial streams using equal modulation
	88	* [8..15 for two streams, 16..23 for three and 24..31 for four]
	89	* - remainder are multiple spatial streams using unequal modulation
	90	*/
	91	for (i = 0; i < max_tx_streams; i++)
ae5eb026 JB	92	ht_cap->mcs.rx_mask[i] =
ae5eb026 JB	93	sband->ht_cap.mcs.rx_mask[i] & ht_cap_ie->mcs.rx_mask[i];
d9fe60de JB	94
	95	if (tx_mcs_set_cap & IEEE80211_HT_MCS_TX_UNEQUAL_MODULATION)
	96	for (i = IEEE80211_HT_MCS_UNEQUAL_MODULATION_START_BYTE;
	97	i < IEEE80211_HT_MCS_MASK_LEN; i++)
ae5eb026	98	ht_cap->mcs.rx_mask[i] =
d9fe60de	99	sband->ht_cap.mcs.rx_mask[i] &
ae5eb026	100	ht_cap_ie->mcs.rx_mask[i];
d9fe60de JB	101
d9fe60de JB	102	/* handle MCS rate 32 too */
ae5eb026 JB	103	if (sband->ht_cap.mcs.rx_mask[32/8] & ht_cap_ie->mcs.rx_mask[32/8] & 1)
	104	ht_cap->mcs.rx_mask[32/8] \|= 1;
	105	}
	106
53f73c09	107	void ieee80211_sta_tear_down_BA_sessions(struct sta_info *sta, bool tx)
de1ede7a	108	{
b8695a8f	109	int i;
de1ede7a	110
0ab33703 JB	111	cancel_work_sync(&sta->ampdu_mlme.work);
0ab33703 JB	112
b8695a8f	113	for (i = 0; i < STA_TID_NUM; i++) {
53f73c09	114	__ieee80211_stop_tx_ba_session(sta, i, WLAN_BACK_INITIATOR, tx);
849b7967	115	__ieee80211_stop_rx_ba_session(sta, i, WLAN_BACK_RECIPIENT,
53f73c09	116	WLAN_REASON_QSTA_LEAVE_QBSS, tx);
de1ede7a	117	}
de1ede7a JB	118	}
de1ede7a JB	119
67c282c0 JB	120	void ieee80211_ba_session_work(struct work_struct *work)
	121	{
	122	struct sta_info *sta =
	123	container_of(work, struct sta_info, ampdu_mlme.work);
	124	struct tid_ampdu_tx *tid_tx;
	125	int tid;
	126
	127	/*
	128	* When this flag is set, new sessions should be
	129	* blocked, and existing sessions will be torn
	130	* down by the code that set the flag, so this
	131	* need not run.
	132	*/
	133	if (test_sta_flags(sta, WLAN_STA_BLOCK_BA))
	134	return;
	135
a93e3644	136	mutex_lock(&sta->ampdu_mlme.mtx);
67c282c0	137	for (tid = 0; tid < STA_TID_NUM; tid++) {
7c3b1dd8 JB	138	if (test_and_clear_bit(tid, sta->ampdu_mlme.tid_rx_timer_expired))
	139	___ieee80211_stop_rx_ba_session(
	140	sta, tid, WLAN_BACK_RECIPIENT,
53f73c09	141	WLAN_REASON_QSTA_TIMEOUT, true);
7c3b1dd8	142
ec034b20 JB	143	tid_tx = sta->ampdu_mlme.tid_start_tx[tid];
	144	if (tid_tx) {
	145	/*
	146	* Assign it over to the normal tid_tx array
	147	* where it "goes live".
	148	*/
	149	spin_lock_bh(&sta->lock);
	150
	151	sta->ampdu_mlme.tid_start_tx[tid] = NULL;
	152	/* could there be a race? */
	153	if (sta->ampdu_mlme.tid_tx[tid])
	154	kfree(tid_tx);
	155	else
	156	ieee80211_assign_tid_tx(sta, tid, tid_tx);
	157	spin_unlock_bh(&sta->lock);
67c282c0	158
67c282c0	159	ieee80211_tx_ba_session_handle_start(sta, tid);
ec034b20 JB	160	continue;
	161	}
	162
40b275b6	163	tid_tx = rcu_dereference_protected_tid_tx(sta, tid);
ec034b20 JB	164	if (tid_tx && test_and_clear_bit(HT_AGG_STATE_WANT_STOP,
ec034b20 JB	165	&tid_tx->state))
67c282c0	166	___ieee80211_stop_tx_ba_session(sta, tid,
53f73c09 JB	167	WLAN_BACK_INITIATOR,
53f73c09 JB	168	true);
67c282c0	169	}
cfcdbde3	170	mutex_unlock(&sta->ampdu_mlme.mtx);
67c282c0 JB	171	}
67c282c0 JB	172
b8695a8f JB	173	void ieee80211_send_delba(struct ieee80211_sub_if_data *sdata,
	174	const u8 *da, u16 tid,
	175	u16 initiator, u16 reason_code)
44d414db JB	176	{
44d414db JB	177	struct ieee80211_local *local = sdata->local;
44d414db JB	178	struct sk_buff *skb;
	179	struct ieee80211_mgmt *mgmt;
	180	u16 params;
	181
	182	skb = dev_alloc_skb(sizeof(*mgmt) + local->hw.extra_tx_headroom);
	183
	184	if (!skb) {
	185	printk(KERN_ERR "%s: failed to allocate buffer "
47846c9b	186	"for delba frame\n", sdata->name);
44d414db JB	187	return;
	188	}
	189
	190	skb_reserve(skb, local->hw.extra_tx_headroom);
	191	mgmt = (struct ieee80211_mgmt *) skb_put(skb, 24);
	192	memset(mgmt, 0, 24);
	193	memcpy(mgmt->da, da, ETH_ALEN);
47846c9b	194	memcpy(mgmt->sa, sdata->vif.addr, ETH_ALEN);
8abd3f9b JB	195	if (sdata->vif.type == NL80211_IFTYPE_AP \|\|
8abd3f9b JB	196	sdata->vif.type == NL80211_IFTYPE_AP_VLAN)
47846c9b	197	memcpy(mgmt->bssid, sdata->vif.addr, ETH_ALEN);
46900298 JB	198	else if (sdata->vif.type == NL80211_IFTYPE_STATION)
	199	memcpy(mgmt->bssid, sdata->u.mgd.bssid, ETH_ALEN);
	200
44d414db JB	201	mgmt->frame_control = cpu_to_le16(IEEE80211_FTYPE_MGMT \|
	202	IEEE80211_STYPE_ACTION);
	203
	204	skb_put(skb, 1 + sizeof(mgmt->u.action.u.delba));
	205
	206	mgmt->u.action.category = WLAN_CATEGORY_BACK;
	207	mgmt->u.action.u.delba.action_code = WLAN_ACTION_DELBA;
	208	params = (u16)(initiator << 11); /* bit 11 initiator */
	209	params \|= (u16)(tid << 12); /* bit 15:12 TID number */
	210
	211	mgmt->u.action.u.delba.params = cpu_to_le16(params);
	212	mgmt->u.action.u.delba.reason_code = cpu_to_le16(reason_code);
	213
62ae67be	214	ieee80211_tx_skb(sdata, skb);
44d414db JB	215	}
44d414db JB	216
de1ede7a JB	217	void ieee80211_process_delba(struct ieee80211_sub_if_data *sdata,
	218	struct sta_info *sta,
	219	struct ieee80211_mgmt *mgmt, size_t len)
	220	{
de1ede7a JB	221	u16 tid, params;
de1ede7a JB	222	u16 initiator;
de1ede7a JB	223
	224	params = le16_to_cpu(mgmt->u.action.u.delba.params);
	225	tid = (params & IEEE80211_DELBA_PARAM_TID_MASK) >> 12;
	226	initiator = (params & IEEE80211_DELBA_PARAM_INITIATOR_MASK) >> 11;
	227
	228	#ifdef CONFIG_MAC80211_HT_DEBUG
	229	if (net_ratelimit())
0c68ae26 JB	230	printk(KERN_DEBUG "delba from %pM (%s) tid %d reason code %d\n",
0c68ae26 JB	231	mgmt->sa, initiator ? "initiator" : "recipient", tid,
372362ad	232	le16_to_cpu(mgmt->u.action.u.delba.reason_code));
de1ede7a JB	233	#endif /* CONFIG_MAC80211_HT_DEBUG */
	234
	235	if (initiator == WLAN_BACK_INITIATOR)
53f73c09 JB	236	__ieee80211_stop_rx_ba_session(sta, tid, WLAN_BACK_INITIATOR, 0,
53f73c09 JB	237	true);
a622ab72	238	else
53f73c09 JB	239	__ieee80211_stop_tx_ba_session(sta, tid, WLAN_BACK_RECIPIENT,
53f73c09 JB	240	true);
de1ede7a	241	}
0f78231b JB	242
	243	int ieee80211_send_smps_action(struct ieee80211_sub_if_data *sdata,
	244	enum ieee80211_smps_mode smps, const u8 *da,
	245	const u8 *bssid)
	246	{
	247	struct ieee80211_local *local = sdata->local;
	248	struct sk_buff *skb;
	249	struct ieee80211_mgmt *action_frame;
	250
	251	/* 27 = header + category + action + smps mode */
	252	skb = dev_alloc_skb(27 + local->hw.extra_tx_headroom);
	253	if (!skb)
	254	return -ENOMEM;
	255
	256	skb_reserve(skb, local->hw.extra_tx_headroom);
	257	action_frame = (void *)skb_put(skb, 27);
	258	memcpy(action_frame->da, da, ETH_ALEN);
	259	memcpy(action_frame->sa, sdata->dev->dev_addr, ETH_ALEN);
	260	memcpy(action_frame->bssid, bssid, ETH_ALEN);
	261	action_frame->frame_control = cpu_to_le16(IEEE80211_FTYPE_MGMT \|
	262	IEEE80211_STYPE_ACTION);
	263	action_frame->u.action.category = WLAN_CATEGORY_HT;
	264	action_frame->u.action.u.ht_smps.action = WLAN_HT_ACTION_SMPS;
	265	switch (smps) {
	266	case IEEE80211_SMPS_AUTOMATIC:
	267	case IEEE80211_SMPS_NUM_MODES:
	268	WARN_ON(1);
	269	case IEEE80211_SMPS_OFF:
	270	action_frame->u.action.u.ht_smps.smps_control =
	271	WLAN_HT_SMPS_CONTROL_DISABLED;
	272	break;
	273	case IEEE80211_SMPS_STATIC:
	274	action_frame->u.action.u.ht_smps.smps_control =
	275	WLAN_HT_SMPS_CONTROL_STATIC;
	276	break;
	277	case IEEE80211_SMPS_DYNAMIC:
	278	action_frame->u.action.u.ht_smps.smps_control =
	279	WLAN_HT_SMPS_CONTROL_DYNAMIC;
	280	break;
	281	}
	282
	283	/* we'll do more on status of this frame */
	284	IEEE80211_SKB_CB(skb)->flags \|= IEEE80211_TX_CTL_REQ_TX_STATUS;
	285	ieee80211_tx_skb(sdata, skb);
	286
	287	return 0;
	288	}
d1f5b7a3 JB	289
	290	void ieee80211_request_smps_work(struct work_struct *work)
	291	{
	292	struct ieee80211_sub_if_data *sdata =
	293	container_of(work, struct ieee80211_sub_if_data,
	294	u.mgd.request_smps_work);
	295
	296	mutex_lock(&sdata->u.mgd.mtx);
	297	__ieee80211_request_smps(sdata, sdata->u.mgd.driver_smps_mode);
	298	mutex_unlock(&sdata->u.mgd.mtx);
	299	}
	300
	301	void ieee80211_request_smps(struct ieee80211_vif *vif,
	302	enum ieee80211_smps_mode smps_mode)
	303	{
	304	struct ieee80211_sub_if_data *sdata = vif_to_sdata(vif);
	305
	306	if (WARN_ON(vif->type != NL80211_IFTYPE_STATION))
	307	return;
	308
	309	if (WARN_ON(smps_mode == IEEE80211_SMPS_OFF))
	310	smps_mode = IEEE80211_SMPS_AUTOMATIC;
	311
e4b55957 JB	312	sdata->u.mgd.driver_smps_mode = smps_mode;
e4b55957 JB	313
d1f5b7a3 JB	314	ieee80211_queue_work(&sdata->local->hw,
	315	&sdata->u.mgd.request_smps_work);
	316	}
	317	/* this might change ... don't want non-open drivers using it */
	318	EXPORT_SYMBOL_GPL(ieee80211_request_smps);