[deliverable/linux.git] / drivers / net / wireless / intel / iwlwifi / mvm / phy-ctxt.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) 2012 - 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) 2012 - 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 <net/mac80211.h>
#include "fw-api.h"
#include "mvm.h"

/* Maps the driver specific channel width definition to the fw values */
u8 iwl_mvm_get_channel_width(struct cfg80211_chan_def *chandef)
{
	switch (chandef->width) {
	case NL80211_CHAN_WIDTH_20_NOHT:
	case NL80211_CHAN_WIDTH_20:
		return PHY_VHT_CHANNEL_MODE20;
	case NL80211_CHAN_WIDTH_40:
		return PHY_VHT_CHANNEL_MODE40;
	case NL80211_CHAN_WIDTH_80:
		return PHY_VHT_CHANNEL_MODE80;
	case NL80211_CHAN_WIDTH_160:
		return PHY_VHT_CHANNEL_MODE160;
	default:
		WARN(1, "Invalid channel width=%u", chandef->width);
		return PHY_VHT_CHANNEL_MODE20;
	}
}

/*
 * Maps the driver specific control channel position (relative to the center
 * freq) definitions to the the fw values
 */
u8 iwl_mvm_get_ctrl_pos(struct cfg80211_chan_def *chandef)
{
	switch (chandef->chan->center_freq - chandef->center_freq1) {
	case -70:
		return PHY_VHT_CTRL_POS_4_BELOW;
	case -50:
		return PHY_VHT_CTRL_POS_3_BELOW;
	case -30:
		return PHY_VHT_CTRL_POS_2_BELOW;
	case -10:
		return PHY_VHT_CTRL_POS_1_BELOW;
	case  10:
		return PHY_VHT_CTRL_POS_1_ABOVE;
	case  30:
		return PHY_VHT_CTRL_POS_2_ABOVE;
	case  50:
		return PHY_VHT_CTRL_POS_3_ABOVE;
	case  70:
		return PHY_VHT_CTRL_POS_4_ABOVE;
	default:
		WARN(1, "Invalid channel definition");
	case 0:
		/*
		 * The FW is expected to check the control channel position only
		 * when in HT/VHT and the channel width is not 20MHz. Return
		 * this value as the default one.
		 */
		return PHY_VHT_CTRL_POS_1_BELOW;
	}
}

/*
 * Construct the generic fields of the PHY context command
 */
static void iwl_mvm_phy_ctxt_cmd_hdr(struct iwl_mvm_phy_ctxt *ctxt,
				     struct iwl_phy_context_cmd *cmd,
				     u32 action, u32 apply_time)
{
	memset(cmd, 0, sizeof(struct iwl_phy_context_cmd));

	cmd->id_and_color = cpu_to_le32(FW_CMD_ID_AND_COLOR(ctxt->id,
							    ctxt->color));
	cmd->action = cpu_to_le32(action);
	cmd->apply_time = cpu_to_le32(apply_time);
}

/*
 * Add the phy configuration to the PHY context command
 */
static void iwl_mvm_phy_ctxt_cmd_data(struct iwl_mvm *mvm,
				      struct iwl_phy_context_cmd *cmd,
				      struct cfg80211_chan_def *chandef,
				      u8 chains_static, u8 chains_dynamic)
{
	u8 active_cnt, idle_cnt;

	/* Set the channel info data */
	cmd->ci.band = (chandef->chan->band == NL80211_BAND_2GHZ ?
	      PHY_BAND_24 : PHY_BAND_5);

	cmd->ci.channel = chandef->chan->hw_value;
	cmd->ci.width = iwl_mvm_get_channel_width(chandef);
	cmd->ci.ctrl_pos = iwl_mvm_get_ctrl_pos(chandef);

	/* Set rx the chains */
	idle_cnt = chains_static;
	active_cnt = chains_dynamic;

	/* In scenarios where we only ever use a single-stream rates,
	 * i.e. legacy 11b/g/a associations, single-stream APs or even
	 * static SMPS, enable both chains to get diversity, improving
	 * the case where we're far enough from the AP that attenuation
	 * between the two antennas is sufficiently different to impact
	 * performance.
	 */
	if (active_cnt == 1 && iwl_mvm_rx_diversity_allowed(mvm)) {
		idle_cnt = 2;
		active_cnt = 2;
	}

	cmd->rxchain_info = cpu_to_le32(iwl_mvm_get_valid_rx_ant(mvm) <<
					PHY_RX_CHAIN_VALID_POS);
	cmd->rxchain_info |= cpu_to_le32(idle_cnt << PHY_RX_CHAIN_CNT_POS);
	cmd->rxchain_info |= cpu_to_le32(active_cnt <<
					 PHY_RX_CHAIN_MIMO_CNT_POS);
#ifdef CONFIG_IWLWIFI_DEBUGFS
	if (unlikely(mvm->dbgfs_rx_phyinfo))
		cmd->rxchain_info = cpu_to_le32(mvm->dbgfs_rx_phyinfo);
#endif

	cmd->txchain_info = cpu_to_le32(iwl_mvm_get_valid_tx_ant(mvm));
}

/*
 * Send a command to apply the current phy configuration. The command is send
 * only if something in the configuration changed: in case that this is the
 * first time that the phy configuration is applied or in case that the phy
 * configuration changed from the previous apply.
 */
static int iwl_mvm_phy_ctxt_apply(struct iwl_mvm *mvm,
				  struct iwl_mvm_phy_ctxt *ctxt,
				  struct cfg80211_chan_def *chandef,
				  u8 chains_static, u8 chains_dynamic,
				  u32 action, u32 apply_time)
{
	struct iwl_phy_context_cmd cmd;
	int ret;

	/* Set the command header fields */
	iwl_mvm_phy_ctxt_cmd_hdr(ctxt, &cmd, action, apply_time);

	/* Set the command data */
	iwl_mvm_phy_ctxt_cmd_data(mvm, &cmd, chandef,
				  chains_static, chains_dynamic);

	ret = iwl_mvm_send_cmd_pdu(mvm, PHY_CONTEXT_CMD, 0,
				   sizeof(struct iwl_phy_context_cmd),
				   &cmd);
	if (ret)
		IWL_ERR(mvm, "PHY ctxt cmd error. ret=%d\n", ret);
	return ret;
}

/*
 * Send a command to add a PHY context based on the current HW configuration.
 */
int iwl_mvm_phy_ctxt_add(struct iwl_mvm *mvm, struct iwl_mvm_phy_ctxt *ctxt,
			 struct cfg80211_chan_def *chandef,
			 u8 chains_static, u8 chains_dynamic)
{
	WARN_ON(!test_bit(IWL_MVM_STATUS_IN_HW_RESTART, &mvm->status) &&
		ctxt->ref);
	lockdep_assert_held(&mvm->mutex);

	ctxt->channel = chandef->chan;

	return iwl_mvm_phy_ctxt_apply(mvm, ctxt, chandef,
				      chains_static, chains_dynamic,
				      FW_CTXT_ACTION_ADD, 0);
}

/*
 * Update the number of references to the given PHY context. This is valid only
 * in case the PHY context was already created, i.e., its reference count > 0.
 */
void iwl_mvm_phy_ctxt_ref(struct iwl_mvm *mvm, struct iwl_mvm_phy_ctxt *ctxt)
{
	lockdep_assert_held(&mvm->mutex);
	ctxt->ref++;
}

/*
 * Send a command to modify the PHY context based on the current HW
 * configuration. Note that the function does not check that the configuration
 * changed.
 */
int iwl_mvm_phy_ctxt_changed(struct iwl_mvm *mvm, struct iwl_mvm_phy_ctxt *ctxt,
			     struct cfg80211_chan_def *chandef,
			     u8 chains_static, u8 chains_dynamic)
{
	lockdep_assert_held(&mvm->mutex);

	ctxt->channel = chandef->chan;
	return iwl_mvm_phy_ctxt_apply(mvm, ctxt, chandef,
				      chains_static, chains_dynamic,
				      FW_CTXT_ACTION_MODIFY, 0);
}

void iwl_mvm_phy_ctxt_unref(struct iwl_mvm *mvm, struct iwl_mvm_phy_ctxt *ctxt)
{
	lockdep_assert_held(&mvm->mutex);

	if (WARN_ON_ONCE(!ctxt))
		return;

	ctxt->ref--;
}

static void iwl_mvm_binding_iterator(void *_data, u8 *mac,
				     struct ieee80211_vif *vif)
{
	unsigned long *data = _data;
	struct iwl_mvm_vif *mvmvif = iwl_mvm_vif_from_mac80211(vif);

	if (!mvmvif->phy_ctxt)
		return;

	if (vif->type == NL80211_IFTYPE_STATION ||
	    vif->type == NL80211_IFTYPE_AP)
		__set_bit(mvmvif->phy_ctxt->id, data);
}

int iwl_mvm_phy_ctx_count(struct iwl_mvm *mvm)
{
	unsigned long phy_ctxt_counter = 0;

	ieee80211_iterate_active_interfaces_atomic(mvm->hw,
						   IEEE80211_IFACE_ITER_NORMAL,
						   iwl_mvm_binding_iterator,
						   &phy_ctxt_counter);

	return hweight8(phy_ctxt_counter);
}
Commit	Line	Data
8ca151b5 JB	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) 2012 - 2014 Intel Corporation. All rights reserved.
8b4139dc	9	* Copyright(c) 2013 - 2014 Intel Mobile Communications GmbH
8ca151b5 JB	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
410dc5aa	26	* in the file called COPYING.
8ca151b5 JB	27	*
8ca151b5 JB	28	* Contact Information:
cb2f8277	29	* Intel Linux Wireless <linuxwifi@intel.com>
8ca151b5 JB	30	* Intel Corporation, 5200 N.E. Elam Young Parkway, Hillsboro, OR 97124-6497
	31	*
	32	* BSD LICENSE
	33	*
51368bf7	34	* Copyright(c) 2012 - 2014 Intel Corporation. All rights reserved.
8b4139dc	35	* Copyright(c) 2013 - 2014 Intel Mobile Communications GmbH
8ca151b5 JB	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
	66	#include <net/mac80211.h>
	67	#include "fw-api.h"
	68	#include "mvm.h"
	69
0d365ae5	70	/* Maps the driver specific channel width definition to the fw values */
6ce73e65	71	u8 iwl_mvm_get_channel_width(struct cfg80211_chan_def *chandef)
8ca151b5 JB	72	{
	73	switch (chandef->width) {
	74	case NL80211_CHAN_WIDTH_20_NOHT:
	75	case NL80211_CHAN_WIDTH_20:
	76	return PHY_VHT_CHANNEL_MODE20;
	77	case NL80211_CHAN_WIDTH_40:
	78	return PHY_VHT_CHANNEL_MODE40;
	79	case NL80211_CHAN_WIDTH_80:
	80	return PHY_VHT_CHANNEL_MODE80;
	81	case NL80211_CHAN_WIDTH_160:
	82	return PHY_VHT_CHANNEL_MODE160;
	83	default:
	84	WARN(1, "Invalid channel width=%u", chandef->width);
	85	return PHY_VHT_CHANNEL_MODE20;
	86	}
	87	}
	88
	89	/*
	90	* Maps the driver specific control channel position (relative to the center
	91	* freq) definitions to the the fw values
	92	*/
6ce73e65	93	u8 iwl_mvm_get_ctrl_pos(struct cfg80211_chan_def *chandef)
8ca151b5 JB	94	{
	95	switch (chandef->chan->center_freq - chandef->center_freq1) {
	96	case -70:
	97	return PHY_VHT_CTRL_POS_4_BELOW;
	98	case -50:
	99	return PHY_VHT_CTRL_POS_3_BELOW;
	100	case -30:
	101	return PHY_VHT_CTRL_POS_2_BELOW;
	102	case -10:
	103	return PHY_VHT_CTRL_POS_1_BELOW;
	104	case 10:
	105	return PHY_VHT_CTRL_POS_1_ABOVE;
	106	case 30:
	107	return PHY_VHT_CTRL_POS_2_ABOVE;
	108	case 50:
	109	return PHY_VHT_CTRL_POS_3_ABOVE;
	110	case 70:
	111	return PHY_VHT_CTRL_POS_4_ABOVE;
	112	default:
	113	WARN(1, "Invalid channel definition");
	114	case 0:
	115	/*
	116	* The FW is expected to check the control channel position only
	117	* when in HT/VHT and the channel width is not 20MHz. Return
	118	* this value as the default one.
	119	*/
	120	return PHY_VHT_CTRL_POS_1_BELOW;
	121	}
	122	}
	123
	124	/*
	125	* Construct the generic fields of the PHY context command
	126	*/
	127	static void iwl_mvm_phy_ctxt_cmd_hdr(struct iwl_mvm_phy_ctxt *ctxt,
	128	struct iwl_phy_context_cmd *cmd,
	129	u32 action, u32 apply_time)
	130	{
	131	memset(cmd, 0, sizeof(struct iwl_phy_context_cmd));
	132
	133	cmd->id_and_color = cpu_to_le32(FW_CMD_ID_AND_COLOR(ctxt->id,
	134	ctxt->color));
	135	cmd->action = cpu_to_le32(action);
	136	cmd->apply_time = cpu_to_le32(apply_time);
	137	}
	138
	139	/*
	140	* Add the phy configuration to the PHY context command
	141	*/
	142	static void iwl_mvm_phy_ctxt_cmd_data(struct iwl_mvm *mvm,
	143	struct iwl_phy_context_cmd *cmd,
	144	struct cfg80211_chan_def *chandef,
	145	u8 chains_static, u8 chains_dynamic)
	146	{
33223542	147	u8 active_cnt, idle_cnt;
8ca151b5 JB	148
8ca151b5 JB	149	/* Set the channel info data */
57fbcce3	150	cmd->ci.band = (chandef->chan->band == NL80211_BAND_2GHZ ?
8ca151b5 JB	151	PHY_BAND_24 : PHY_BAND_5);
	152
	153	cmd->ci.channel = chandef->chan->hw_value;
	154	cmd->ci.width = iwl_mvm_get_channel_width(chandef);
	155	cmd->ci.ctrl_pos = iwl_mvm_get_ctrl_pos(chandef);
	156
	157	/* Set rx the chains */
8ca151b5 JB	158	idle_cnt = chains_static;
	159	active_cnt = chains_dynamic;
	160
1a095d30 JB	161	/* In scenarios where we only ever use a single-stream rates,
	162	* i.e. legacy 11b/g/a associations, single-stream APs or even
	163	* static SMPS, enable both chains to get diversity, improving
	164	* the case where we're far enough from the AP that attenuation
	165	* between the two antennas is sufficiently different to impact
	166	* performance.
	167	*/
5c904224	168	if (active_cnt == 1 && iwl_mvm_rx_diversity_allowed(mvm)) {
1a095d30 JB	169	idle_cnt = 2;
	170	active_cnt = 2;
	171	}
	172
0b83795a	173	cmd->rxchain_info = cpu_to_le32(iwl_mvm_get_valid_rx_ant(mvm) <<
8ca151b5 JB	174	PHY_RX_CHAIN_VALID_POS);
	175	cmd->rxchain_info \|= cpu_to_le32(idle_cnt << PHY_RX_CHAIN_CNT_POS);
	176	cmd->rxchain_info \|= cpu_to_le32(active_cnt <<
	177	PHY_RX_CHAIN_MIMO_CNT_POS);
aa5e1832	178	#ifdef CONFIG_IWLWIFI_DEBUGFS
ddf89ab1 EG	179	if (unlikely(mvm->dbgfs_rx_phyinfo))
ddf89ab1 EG	180	cmd->rxchain_info = cpu_to_le32(mvm->dbgfs_rx_phyinfo);
aa5e1832	181	#endif
8ca151b5	182
a0544272	183	cmd->txchain_info = cpu_to_le32(iwl_mvm_get_valid_tx_ant(mvm));
8ca151b5 JB	184	}
	185
	186	/*
	187	* Send a command to apply the current phy configuration. The command is send
	188	* only if something in the configuration changed: in case that this is the
	189	* first time that the phy configuration is applied or in case that the phy
	190	* configuration changed from the previous apply.
	191	*/
	192	static int iwl_mvm_phy_ctxt_apply(struct iwl_mvm *mvm,
	193	struct iwl_mvm_phy_ctxt *ctxt,
	194	struct cfg80211_chan_def *chandef,
	195	u8 chains_static, u8 chains_dynamic,
	196	u32 action, u32 apply_time)
	197	{
	198	struct iwl_phy_context_cmd cmd;
	199	int ret;
	200
	201	/* Set the command header fields */
	202	iwl_mvm_phy_ctxt_cmd_hdr(ctxt, &cmd, action, apply_time);
	203
	204	/* Set the command data */
	205	iwl_mvm_phy_ctxt_cmd_data(mvm, &cmd, chandef,
	206	chains_static, chains_dynamic);
	207
a1022927	208	ret = iwl_mvm_send_cmd_pdu(mvm, PHY_CONTEXT_CMD, 0,
8ca151b5 JB	209	sizeof(struct iwl_phy_context_cmd),
	210	&cmd);
	211	if (ret)
	212	IWL_ERR(mvm, "PHY ctxt cmd error. ret=%d\n", ret);
	213	return ret;
	214	}
	215
8ca151b5 JB	216	/*
	217	* Send a command to add a PHY context based on the current HW configuration.
	218	*/
	219	int iwl_mvm_phy_ctxt_add(struct iwl_mvm mvm, struct iwl_mvm_phy_ctxt ctxt,
	220	struct cfg80211_chan_def *chandef,
	221	u8 chains_static, u8 chains_dynamic)
	222	{
debff618 JB	223	WARN_ON(!test_bit(IWL_MVM_STATUS_IN_HW_RESTART, &mvm->status) &&
debff618 JB	224	ctxt->ref);
8ca151b5	225	lockdep_assert_held(&mvm->mutex);
8ca151b5	226
fe0f2de3	227	ctxt->channel = chandef->chan;
8ca151b5	228
7a531741 JB	229	return iwl_mvm_phy_ctxt_apply(mvm, ctxt, chandef,
	230	chains_static, chains_dynamic,
	231	FW_CTXT_ACTION_ADD, 0);
fe0f2de3	232	}
8ca151b5	233
fe0f2de3 IP	234	/*
	235	* Update the number of references to the given PHY context. This is valid only
	236	* in case the PHY context was already created, i.e., its reference count > 0.
	237	*/
	238	void iwl_mvm_phy_ctxt_ref(struct iwl_mvm mvm, struct iwl_mvm_phy_ctxt ctxt)
	239	{
fe0f2de3	240	lockdep_assert_held(&mvm->mutex);
fe0f2de3	241	ctxt->ref++;
8ca151b5 JB	242	}
	243
	244	/*
	245	* Send a command to modify the PHY context based on the current HW
	246	* configuration. Note that the function does not check that the configuration
	247	* changed.
	248	*/
	249	int iwl_mvm_phy_ctxt_changed(struct iwl_mvm mvm, struct iwl_mvm_phy_ctxt ctxt,
	250	struct cfg80211_chan_def *chandef,
	251	u8 chains_static, u8 chains_dynamic)
	252	{
	253	lockdep_assert_held(&mvm->mutex);
	254
	255	ctxt->channel = chandef->chan;
	256	return iwl_mvm_phy_ctxt_apply(mvm, ctxt, chandef,
	257	chains_static, chains_dynamic,
	258	FW_CTXT_ACTION_MODIFY, 0);
	259	}
	260
fe0f2de3 IP	261	void iwl_mvm_phy_ctxt_unref(struct iwl_mvm mvm, struct iwl_mvm_phy_ctxt ctxt)
	262	{
	263	lockdep_assert_held(&mvm->mutex);
e2821011 JB	264
	265	if (WARN_ON_ONCE(!ctxt))
	266	return;
	267
fe0f2de3	268	ctxt->ref--;
fe0f2de3	269	}
cf7b491d AN	270
	271	static void iwl_mvm_binding_iterator(void _data, u8 mac,
	272	struct ieee80211_vif *vif)
	273	{
	274	unsigned long *data = _data;
	275	struct iwl_mvm_vif *mvmvif = iwl_mvm_vif_from_mac80211(vif);
	276
	277	if (!mvmvif->phy_ctxt)
	278	return;
	279
	280	if (vif->type == NL80211_IFTYPE_STATION \|\|
	281	vif->type == NL80211_IFTYPE_AP)
	282	__set_bit(mvmvif->phy_ctxt->id, data);
	283	}
	284
	285	int iwl_mvm_phy_ctx_count(struct iwl_mvm *mvm)
	286	{
	287	unsigned long phy_ctxt_counter = 0;
	288
	289	ieee80211_iterate_active_interfaces_atomic(mvm->hw,
	290	IEEE80211_IFACE_ITER_NORMAL,
	291	iwl_mvm_binding_iterator,
	292	&phy_ctxt_counter);
	293
	294	return hweight8(phy_ctxt_counter);
	295	}