[deliverable/linux.git] / drivers / net / wireless / intel / iwlwifi / mvm / sf.c

/******************************************************************************
 *
 * 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
 *
 * Copyright(c) 2013 - 2014 Intel Corporation. All rights reserved.
 * Copyright(c) 2013 - 2014 Intel Mobile Communications GmbH
 *
 * 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
 * in the file called COPYING.
 *
 * Contact Information:
 *  Intel Linux Wireless <linuxwifi@intel.com>
 * Intel Corporation, 5200 N.E. Elam Young Parkway, Hillsboro, OR 97124-6497
 *
 * BSD LICENSE
 *
 * Copyright(c) 2013 - 2014 Intel Corporation. All rights reserved.
 * Copyright(c) 2013 - 2014 Intel Mobile Communications GmbH
 * 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 "mvm.h"

/* For counting bound interfaces */
struct iwl_mvm_active_iface_iterator_data {
	struct ieee80211_vif *ignore_vif;
	u8 sta_vif_ap_sta_id;
	enum iwl_sf_state sta_vif_state;
	int num_active_macs;
};

/*
 * Count bound interfaces which are not p2p, besides data->ignore_vif.
 * data->station_vif will point to one bound vif of type station, if exists.
 */
static void iwl_mvm_bound_iface_iterator(void *_data, u8 *mac,
					 struct ieee80211_vif *vif)
{
	struct iwl_mvm_active_iface_iterator_data *data = _data;
	struct iwl_mvm_vif *mvmvif = iwl_mvm_vif_from_mac80211(vif);

	if (vif == data->ignore_vif || !mvmvif->phy_ctxt ||
	    vif->type == NL80211_IFTYPE_P2P_DEVICE)
		return;

	data->num_active_macs++;

	if (vif->type == NL80211_IFTYPE_STATION) {
		data->sta_vif_ap_sta_id = mvmvif->ap_sta_id;
		if (vif->bss_conf.assoc)
			data->sta_vif_state = SF_FULL_ON;
		else
			data->sta_vif_state = SF_INIT_OFF;
	}
}

/*
 * Aging and idle timeouts for the different possible scenarios
 * in default configuration
 */
static const
__le32 sf_full_timeout_def[SF_NUM_SCENARIO][SF_NUM_TIMEOUT_TYPES] = {
	{
		cpu_to_le32(SF_SINGLE_UNICAST_AGING_TIMER_DEF),
		cpu_to_le32(SF_SINGLE_UNICAST_IDLE_TIMER_DEF)
	},
	{
		cpu_to_le32(SF_AGG_UNICAST_AGING_TIMER_DEF),
		cpu_to_le32(SF_AGG_UNICAST_IDLE_TIMER_DEF)
	},
	{
		cpu_to_le32(SF_MCAST_AGING_TIMER_DEF),
		cpu_to_le32(SF_MCAST_IDLE_TIMER_DEF)
	},
	{
		cpu_to_le32(SF_BA_AGING_TIMER_DEF),
		cpu_to_le32(SF_BA_IDLE_TIMER_DEF)
	},
	{
		cpu_to_le32(SF_TX_RE_AGING_TIMER_DEF),
		cpu_to_le32(SF_TX_RE_IDLE_TIMER_DEF)
	},
};

/*
 * Aging and idle timeouts for the different possible scenarios
 * in single BSS MAC configuration.
 */
static const __le32 sf_full_timeout[SF_NUM_SCENARIO][SF_NUM_TIMEOUT_TYPES] = {
	{
		cpu_to_le32(SF_SINGLE_UNICAST_AGING_TIMER),
		cpu_to_le32(SF_SINGLE_UNICAST_IDLE_TIMER)
	},
	{
		cpu_to_le32(SF_AGG_UNICAST_AGING_TIMER),
		cpu_to_le32(SF_AGG_UNICAST_IDLE_TIMER)
	},
	{
		cpu_to_le32(SF_MCAST_AGING_TIMER),
		cpu_to_le32(SF_MCAST_IDLE_TIMER)
	},
	{
		cpu_to_le32(SF_BA_AGING_TIMER),
		cpu_to_le32(SF_BA_IDLE_TIMER)
	},
	{
		cpu_to_le32(SF_TX_RE_AGING_TIMER),
		cpu_to_le32(SF_TX_RE_IDLE_TIMER)
	},
};

static void iwl_mvm_fill_sf_command(struct iwl_mvm *mvm,
				    struct iwl_sf_cfg_cmd *sf_cmd,
				    struct ieee80211_sta *sta)
{
	int i, j, watermark;

	sf_cmd->watermark[SF_LONG_DELAY_ON] = cpu_to_le32(SF_W_MARK_SCAN);

	/*
	 * If we are in association flow - check antenna configuration
	 * capabilities of the AP station, and choose the watermark accordingly.
	 */
	if (sta) {
		if (sta->ht_cap.ht_supported || sta->vht_cap.vht_supported) {
			switch (sta->rx_nss) {
			case 1:
				watermark = SF_W_MARK_SISO;
				break;
			case 2:
				watermark = SF_W_MARK_MIMO2;
				break;
			default:
				watermark = SF_W_MARK_MIMO3;
				break;
			}
		} else {
			watermark = SF_W_MARK_LEGACY;
		}
	/* default watermark value for unassociated mode. */
	} else {
		watermark = SF_W_MARK_MIMO2;
	}
	sf_cmd->watermark[SF_FULL_ON] = cpu_to_le32(watermark);

	for (i = 0; i < SF_NUM_SCENARIO; i++) {
		for (j = 0; j < SF_NUM_TIMEOUT_TYPES; j++) {
			sf_cmd->long_delay_timeouts[i][j] =
					cpu_to_le32(SF_LONG_DELAY_AGING_TIMER);
		}
	}

	if (sta) {
		BUILD_BUG_ON(sizeof(sf_full_timeout) !=
			     sizeof(__le32) * SF_NUM_SCENARIO *
			     SF_NUM_TIMEOUT_TYPES);

		memcpy(sf_cmd->full_on_timeouts, sf_full_timeout,
		       sizeof(sf_full_timeout));
	} else {
		BUILD_BUG_ON(sizeof(sf_full_timeout_def) !=
			     sizeof(__le32) * SF_NUM_SCENARIO *
			     SF_NUM_TIMEOUT_TYPES);

		memcpy(sf_cmd->full_on_timeouts, sf_full_timeout_def,
		       sizeof(sf_full_timeout_def));
	}

}

static int iwl_mvm_sf_config(struct iwl_mvm *mvm, u8 sta_id,
			     enum iwl_sf_state new_state)
{
	struct iwl_sf_cfg_cmd sf_cmd = {
		.state = cpu_to_le32(SF_FULL_ON),
	};
	struct ieee80211_sta *sta;
	int ret = 0;

	if (mvm->cfg->disable_dummy_notification)
		sf_cmd.state |= cpu_to_le32(SF_CFG_DUMMY_NOTIF_OFF);

	/*
	 * If an associated AP sta changed its antenna configuration, the state
	 * will remain FULL_ON but SF parameters need to be reconsidered.
	 */
	if (new_state != SF_FULL_ON && mvm->sf_state == new_state)
		return 0;

	switch (new_state) {
	case SF_UNINIT:
		iwl_mvm_fill_sf_command(mvm, &sf_cmd, NULL);
		break;
	case SF_FULL_ON:
		if (sta_id == IWL_MVM_STATION_COUNT) {
			IWL_ERR(mvm,
				"No station: Cannot switch SF to FULL_ON\n");
			return -EINVAL;
		}
		rcu_read_lock();
		sta = rcu_dereference(mvm->fw_id_to_mac_id[sta_id]);
		if (IS_ERR_OR_NULL(sta)) {
			IWL_ERR(mvm, "Invalid station id\n");
			rcu_read_unlock();
			return -EINVAL;
		}
		iwl_mvm_fill_sf_command(mvm, &sf_cmd, sta);
		rcu_read_unlock();
		break;
	case SF_INIT_OFF:
		iwl_mvm_fill_sf_command(mvm, &sf_cmd, NULL);
		break;
	default:
		WARN_ONCE(1, "Invalid state: %d. not sending Smart Fifo cmd\n",
			  new_state);
		return -EINVAL;
	}

	ret = iwl_mvm_send_cmd_pdu(mvm, REPLY_SF_CFG_CMD, CMD_ASYNC,
				   sizeof(sf_cmd), &sf_cmd);
	if (!ret)
		mvm->sf_state = new_state;

	return ret;
}

/*
 * Update Smart fifo:
 * Count bound interfaces that are not to be removed, ignoring p2p devices,
 * and set new state accordingly.
 */
int iwl_mvm_sf_update(struct iwl_mvm *mvm, struct ieee80211_vif *changed_vif,
		      bool remove_vif)
{
	enum iwl_sf_state new_state;
	u8 sta_id = IWL_MVM_STATION_COUNT;
	struct iwl_mvm_vif *mvmvif = NULL;
	struct iwl_mvm_active_iface_iterator_data data = {
		.ignore_vif = changed_vif,
		.sta_vif_state = SF_UNINIT,
		.sta_vif_ap_sta_id = IWL_MVM_STATION_COUNT,
	};

	/*
	 * Ignore the call if we are in HW Restart flow, or if the handled
	 * vif is a p2p device.
	 */
	if (test_bit(IWL_MVM_STATUS_IN_HW_RESTART, &mvm->status) ||
	    (changed_vif && changed_vif->type == NL80211_IFTYPE_P2P_DEVICE))
		return 0;

	ieee80211_iterate_active_interfaces_atomic(mvm->hw,
						   IEEE80211_IFACE_ITER_NORMAL,
						   iwl_mvm_bound_iface_iterator,
						   &data);

	/* If changed_vif exists and is not to be removed, add to the count */
	if (changed_vif && !remove_vif)
		data.num_active_macs++;

	switch (data.num_active_macs) {
	case 0:
		/* If there are no active macs - change state to SF_INIT_OFF */
		new_state = SF_INIT_OFF;
		break;
	case 1:
		if (remove_vif) {
			/* The one active mac left is of type station
			 * and we filled the relevant data during iteration
			 */
			new_state = data.sta_vif_state;
			sta_id = data.sta_vif_ap_sta_id;
		} else {
			if (WARN_ON(!changed_vif))
				return -EINVAL;
			if (changed_vif->type != NL80211_IFTYPE_STATION) {
				new_state = SF_UNINIT;
			} else if (changed_vif->bss_conf.assoc &&
				   changed_vif->bss_conf.dtim_period) {
				mvmvif = iwl_mvm_vif_from_mac80211(changed_vif);
				sta_id = mvmvif->ap_sta_id;
				new_state = SF_FULL_ON;
			} else {
				new_state = SF_INIT_OFF;
			}
		}
		break;
	default:
		/* If there are multiple active macs - change to SF_UNINIT */
		new_state = SF_UNINIT;
	}
	return iwl_mvm_sf_config(mvm, sta_id, new_state);
}
Commit	Line	Data
1f3b0ff8 LE	1	/******************************************************************************
	2	*
	3	* This file is provided under a dual BSD/GPLv2 license. When using or
	4	* redistributing this file, you may do so under either license.
	5	*
	6	* GPL LICENSE SUMMARY
	7	*
51368bf7	8	* Copyright(c) 2013 - 2014 Intel Corporation. All rights reserved.
8b4139dc	9	* Copyright(c) 2013 - 2014 Intel Mobile Communications GmbH
1f3b0ff8 LE	10	*
	11	* This program is free software; you can redistribute it and/or modify
	12	* it under the terms of version 2 of the GNU General Public License as
	13	* published by the Free Software Foundation.
	14	*
	15	* This program is distributed in the hope that it will be useful, but
	16	* WITHOUT ANY WARRANTY; without even the implied warranty of
	17	* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
	18	* General Public License for more details.
	19	*
	20	* You should have received a copy of the GNU General Public License
	21	* along with this program; if not, write to the Free Software
	22	* Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110,
	23	* USA
	24	*
	25	* The full GNU General Public License is included in this distribution
	26	* in the file called COPYING.
	27	*
	28	* Contact Information:
d01c5366	29	* Intel Linux Wireless <linuxwifi@intel.com>
1f3b0ff8 LE	30	* Intel Corporation, 5200 N.E. Elam Young Parkway, Hillsboro, OR 97124-6497
	31	*
	32	* BSD LICENSE
	33	*
51368bf7	34	* Copyright(c) 2013 - 2014 Intel Corporation. All rights reserved.
8b4139dc	35	* Copyright(c) 2013 - 2014 Intel Mobile Communications GmbH
1f3b0ff8 LE	36	* All rights reserved.
	37	*
	38	* Redistribution and use in source and binary forms, with or without
	39	* modification, are permitted provided that the following conditions
	40	* are met:
	41	*
	42	* * Redistributions of source code must retain the above copyright
	43	* notice, this list of conditions and the following disclaimer.
	44	* * Redistributions in binary form must reproduce the above copyright
	45	* notice, this list of conditions and the following disclaimer in
	46	* the documentation and/or other materials provided with the
	47	* distribution.
	48	* * Neither the name Intel Corporation nor the names of its
	49	* contributors may be used to endorse or promote products derived
	50	* from this software without specific prior written permission.
	51	*
	52	* THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
	53	* "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
	54	* LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
	55	* A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
	56	* OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
	57	* SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
	58	* LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
	59	* DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
	60	* THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
	61	* (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
	62	* OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
	63	*
	64	*****************************************************************************/
	65	#include "mvm.h"
	66
	67	/* For counting bound interfaces */
	68	struct iwl_mvm_active_iface_iterator_data {
	69	struct ieee80211_vif *ignore_vif;
	70	u8 sta_vif_ap_sta_id;
	71	enum iwl_sf_state sta_vif_state;
	72	int num_active_macs;
	73	};
	74
	75	/*
	76	* Count bound interfaces which are not p2p, besides data->ignore_vif.
	77	* data->station_vif will point to one bound vif of type station, if exists.
	78	*/
	79	static void iwl_mvm_bound_iface_iterator(void _data, u8 mac,
	80	struct ieee80211_vif *vif)
	81	{
	82	struct iwl_mvm_active_iface_iterator_data *data = _data;
	83	struct iwl_mvm_vif *mvmvif = iwl_mvm_vif_from_mac80211(vif);
	84
	85	if (vif == data->ignore_vif \|\| !mvmvif->phy_ctxt \|\|
	86	vif->type == NL80211_IFTYPE_P2P_DEVICE)
	87	return;
	88
	89	data->num_active_macs++;
	90
	91	if (vif->type == NL80211_IFTYPE_STATION) {
	92	data->sta_vif_ap_sta_id = mvmvif->ap_sta_id;
	93	if (vif->bss_conf.assoc)
	94	data->sta_vif_state = SF_FULL_ON;
	95	else
	96	data->sta_vif_state = SF_INIT_OFF;
	97	}
	98	}
	99
100	/*
101	* Aging and idle timeouts for the different possible scenarios
f4a3ee49 EH	102	* in default configuration
	103	*/
	104	static const
	105	__le32 sf_full_timeout_def[SF_NUM_SCENARIO][SF_NUM_TIMEOUT_TYPES] = {
	106	{
	107	cpu_to_le32(SF_SINGLE_UNICAST_AGING_TIMER_DEF),
	108	cpu_to_le32(SF_SINGLE_UNICAST_IDLE_TIMER_DEF)
	109	},
	110	{
	111	cpu_to_le32(SF_AGG_UNICAST_AGING_TIMER_DEF),
	112	cpu_to_le32(SF_AGG_UNICAST_IDLE_TIMER_DEF)
	113	},
	114	{
	115	cpu_to_le32(SF_MCAST_AGING_TIMER_DEF),
	116	cpu_to_le32(SF_MCAST_IDLE_TIMER_DEF)
	117	},
	118	{
	119	cpu_to_le32(SF_BA_AGING_TIMER_DEF),
	120	cpu_to_le32(SF_BA_IDLE_TIMER_DEF)
	121	},
	122	{
	123	cpu_to_le32(SF_TX_RE_AGING_TIMER_DEF),
	124	cpu_to_le32(SF_TX_RE_IDLE_TIMER_DEF)
	125	},
	126	};
	127
	128	/*
	129	* Aging and idle timeouts for the different possible scenarios
	130	* in single BSS MAC configuration.
1f3b0ff8 LE	131	*/
	132	static const __le32 sf_full_timeout[SF_NUM_SCENARIO][SF_NUM_TIMEOUT_TYPES] = {
	133	{
	134	cpu_to_le32(SF_SINGLE_UNICAST_AGING_TIMER),
	135	cpu_to_le32(SF_SINGLE_UNICAST_IDLE_TIMER)
	136	},
	137	{
	138	cpu_to_le32(SF_AGG_UNICAST_AGING_TIMER),
	139	cpu_to_le32(SF_AGG_UNICAST_IDLE_TIMER)
	140	},
	141	{
	142	cpu_to_le32(SF_MCAST_AGING_TIMER),
	143	cpu_to_le32(SF_MCAST_IDLE_TIMER)
	144	},
	145	{
	146	cpu_to_le32(SF_BA_AGING_TIMER),
	147	cpu_to_le32(SF_BA_IDLE_TIMER)
	148	},
	149	{
	150	cpu_to_le32(SF_TX_RE_AGING_TIMER),
	151	cpu_to_le32(SF_TX_RE_IDLE_TIMER)
	152	},
	153	};
	154
f4a3ee49 EH	155	static void iwl_mvm_fill_sf_command(struct iwl_mvm *mvm,
f4a3ee49 EH	156	struct iwl_sf_cfg_cmd *sf_cmd,
1f3b0ff8 LE	157	struct ieee80211_sta *sta)
	158	{
	159	int i, j, watermark;
	160
	161	sf_cmd->watermark[SF_LONG_DELAY_ON] = cpu_to_le32(SF_W_MARK_SCAN);
	162
	163	/*
	164	* If we are in association flow - check antenna configuration
	165	* capabilities of the AP station, and choose the watermark accordingly.
	166	*/
	167	if (sta) {
	168	if (sta->ht_cap.ht_supported \|\| sta->vht_cap.vht_supported) {
	169	switch (sta->rx_nss) {
	170	case 1:
	171	watermark = SF_W_MARK_SISO;
	172	break;
	173	case 2:
	174	watermark = SF_W_MARK_MIMO2;
	175	break;
	176	default:
	177	watermark = SF_W_MARK_MIMO3;
	178	break;
	179	}
	180	} else {
	181	watermark = SF_W_MARK_LEGACY;
	182	}
	183	/* default watermark value for unassociated mode. */
	184	} else {
	185	watermark = SF_W_MARK_MIMO2;
	186	}
	187	sf_cmd->watermark[SF_FULL_ON] = cpu_to_le32(watermark);
	188
	189	for (i = 0; i < SF_NUM_SCENARIO; i++) {
	190	for (j = 0; j < SF_NUM_TIMEOUT_TYPES; j++) {
	191	sf_cmd->long_delay_timeouts[i][j] =
	192	cpu_to_le32(SF_LONG_DELAY_AGING_TIMER);
	193	}
	194	}
1f3b0ff8	195
97f95c93	196	if (sta) {
f4a3ee49 EH	197	BUILD_BUG_ON(sizeof(sf_full_timeout) !=
	198	sizeof(__le32) * SF_NUM_SCENARIO *
	199	SF_NUM_TIMEOUT_TYPES);
	200
	201	memcpy(sf_cmd->full_on_timeouts, sf_full_timeout,
	202	sizeof(sf_full_timeout));
	203	} else {
	204	BUILD_BUG_ON(sizeof(sf_full_timeout_def) !=
	205	sizeof(__le32) * SF_NUM_SCENARIO *
	206	SF_NUM_TIMEOUT_TYPES);
	207
	208	memcpy(sf_cmd->full_on_timeouts, sf_full_timeout_def,
	209	sizeof(sf_full_timeout_def));
	210	}
	211
1f3b0ff8 LE	212	}
	213
	214	static int iwl_mvm_sf_config(struct iwl_mvm *mvm, u8 sta_id,
	215	enum iwl_sf_state new_state)
	216	{
	217	struct iwl_sf_cfg_cmd sf_cmd = {
f4a3ee49	218	.state = cpu_to_le32(SF_FULL_ON),
1f3b0ff8 LE	219	};
	220	struct ieee80211_sta *sta;
	221	int ret = 0;
	222
0ec850dc	223	if (mvm->cfg->disable_dummy_notification)
161bdb77 EH	224	sf_cmd.state \|= cpu_to_le32(SF_CFG_DUMMY_NOTIF_OFF);
161bdb77 EH	225
1f3b0ff8 LE	226	/*
	227	* If an associated AP sta changed its antenna configuration, the state
	228	* will remain FULL_ON but SF parameters need to be reconsidered.
	229	*/
	230	if (new_state != SF_FULL_ON && mvm->sf_state == new_state)
	231	return 0;
	232
	233	switch (new_state) {
	234	case SF_UNINIT:
97f95c93	235	iwl_mvm_fill_sf_command(mvm, &sf_cmd, NULL);
1f3b0ff8 LE	236	break;
	237	case SF_FULL_ON:
	238	if (sta_id == IWL_MVM_STATION_COUNT) {
	239	IWL_ERR(mvm,
	240	"No station: Cannot switch SF to FULL_ON\n");
	241	return -EINVAL;
	242	}
	243	rcu_read_lock();
	244	sta = rcu_dereference(mvm->fw_id_to_mac_id[sta_id]);
	245	if (IS_ERR_OR_NULL(sta)) {
	246	IWL_ERR(mvm, "Invalid station id\n");
	247	rcu_read_unlock();
	248	return -EINVAL;
	249	}
f4a3ee49	250	iwl_mvm_fill_sf_command(mvm, &sf_cmd, sta);
1f3b0ff8 LE	251	rcu_read_unlock();
	252	break;
	253	case SF_INIT_OFF:
f4a3ee49	254	iwl_mvm_fill_sf_command(mvm, &sf_cmd, NULL);
1f3b0ff8 LE	255	break;
	256	default:
	257	WARN_ONCE(1, "Invalid state: %d. not sending Smart Fifo cmd\n",
	258	new_state);
	259	return -EINVAL;
	260	}
	261
	262	ret = iwl_mvm_send_cmd_pdu(mvm, REPLY_SF_CFG_CMD, CMD_ASYNC,
	263	sizeof(sf_cmd), &sf_cmd);
	264	if (!ret)
	265	mvm->sf_state = new_state;
	266
	267	return ret;
	268	}
	269
	270	/*
	271	* Update Smart fifo:
	272	* Count bound interfaces that are not to be removed, ignoring p2p devices,
	273	* and set new state accordingly.
	274	*/
	275	int iwl_mvm_sf_update(struct iwl_mvm mvm, struct ieee80211_vif changed_vif,
	276	bool remove_vif)
	277	{
	278	enum iwl_sf_state new_state;
	279	u8 sta_id = IWL_MVM_STATION_COUNT;
	280	struct iwl_mvm_vif *mvmvif = NULL;
	281	struct iwl_mvm_active_iface_iterator_data data = {
	282	.ignore_vif = changed_vif,
	283	.sta_vif_state = SF_UNINIT,
	284	.sta_vif_ap_sta_id = IWL_MVM_STATION_COUNT,
	285	};
	286
1f3b0ff8 LE	287	/*
	288	* Ignore the call if we are in HW Restart flow, or if the handled
	289	* vif is a p2p device.
	290	*/
	291	if (test_bit(IWL_MVM_STATUS_IN_HW_RESTART, &mvm->status) \|\|
	292	(changed_vif && changed_vif->type == NL80211_IFTYPE_P2P_DEVICE))
	293	return 0;
	294
	295	ieee80211_iterate_active_interfaces_atomic(mvm->hw,
	296	IEEE80211_IFACE_ITER_NORMAL,
	297	iwl_mvm_bound_iface_iterator,
	298	&data);
	299
	300	/* If changed_vif exists and is not to be removed, add to the count */
	301	if (changed_vif && !remove_vif)
	302	data.num_active_macs++;
	303
	304	switch (data.num_active_macs) {
	305	case 0:
	306	/* If there are no active macs - change state to SF_INIT_OFF */
	307	new_state = SF_INIT_OFF;
	308	break;
	309	case 1:
	310	if (remove_vif) {
	311	/* The one active mac left is of type station
	312	* and we filled the relevant data during iteration
	313	*/
	314	new_state = data.sta_vif_state;
	315	sta_id = data.sta_vif_ap_sta_id;
	316	} else {
	317	if (WARN_ON(!changed_vif))
	318	return -EINVAL;
	319	if (changed_vif->type != NL80211_IFTYPE_STATION) {
	320	new_state = SF_UNINIT;
0229cdaf JB	321	} else if (changed_vif->bss_conf.assoc &&
0229cdaf JB	322	changed_vif->bss_conf.dtim_period) {
1f3b0ff8 LE	323	mvmvif = iwl_mvm_vif_from_mac80211(changed_vif);
	324	sta_id = mvmvif->ap_sta_id;
	325	new_state = SF_FULL_ON;
	326	} else {
	327	new_state = SF_INIT_OFF;
	328	}
	329	}
	330	break;
	331	default:
	332	/* If there are multiple active macs - change to SF_UNINIT */
	333	new_state = SF_UNINIT;
	334	}
	335	return iwl_mvm_sf_config(mvm, sta_id, new_state);
	336	}