drivers/net/wireless/mwifiex/11ac.c - kernel/msm-5.4 - Gitiles

 /*
  * Marvell Wireless LAN device driver: 802.11ac
  *
  * Copyright (C) 2013, Marvell International Ltd.
  *
  * This software file (the "File") is distributed by Marvell International
  * Ltd. under the terms of the GNU General Public License Version 2, June 1991
  * (the "License").  You may use, redistribute and/or modify this File in
  * accordance with the terms and conditions of the License, a copy of which
  * is available by writing to the Free Software Foundation, Inc.,
  * 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA or on the
  * worldwide web at http://www.gnu.org/licenses/old-licenses/gpl-2.0.txt.
  *
  * THE FILE IS DISTRIBUTED AS-IS, WITHOUT WARRANTY OF ANY KIND, AND THE
  * IMPLIED WARRANTIES OF MERCHANTABILITY OR FITNESS FOR A PARTICULAR PURPOSE
  * ARE EXPRESSLY DISCLAIMED.  The License provides additional details about
  * this warranty disclaimer.
  */

 #include "decl.h"
 #include "ioctl.h"
 #include "fw.h"
 #include "main.h"
 #include "11ac.h"

 /* This function converts the 2-bit MCS map to the highest long GI
  * VHT data rate.
  */
 static u16
 mwifiex_convert_mcsmap_to_maxrate(struct mwifiex_private *priv,
 				  u8 bands, u16 mcs_map)
 {
 	u8 i, nss, max_mcs;
 	u16 max_rate = 0;
 	u32 usr_vht_cap_info = 0;
 	struct mwifiex_adapter *adapter = priv->adapter;
 	/* tables of the MCS map to the highest data rate (in Mbps)
 	 * supported for long GI
 	 */
 	u16 max_rate_lgi_80MHZ[8][3] = {
 		{0x124, 0x15F, 0x186},	/* NSS = 1 */
 		{0x249, 0x2BE, 0x30C},  /* NSS = 2 */
 		{0x36D, 0x41D, 0x492},  /* NSS = 3 */
 		{0x492, 0x57C, 0x618},  /* NSS = 4 */
 		{0x5B6, 0x6DB, 0x79E},  /* NSS = 5 */
 		{0x6DB, 0x83A, 0x0},    /* NSS = 6 */
 		{0x7FF, 0x999, 0xAAA},  /* NSS = 7 */
 		{0x924, 0xAF8, 0xC30}   /* NSS = 8 */
 	};
 	u16 max_rate_lgi_160MHZ[8][3] = {
 		{0x249, 0x2BE, 0x30C},   /* NSS = 1 */
 		{0x492, 0x57C, 0x618},   /* NSS = 2 */
 		{0x6DB, 0x83A, 0x0},     /* NSS = 3 */
 		{0x924, 0xAF8, 0xC30},   /* NSS = 4 */
 		{0xB6D, 0xDB6, 0xF3C},   /* NSS = 5 */
 		{0xDB6, 0x1074, 0x1248}, /* NSS = 6 */
 		{0xFFF, 0x1332, 0x1554}, /* NSS = 7 */
 		{0x1248, 0x15F0, 0x1860} /* NSS = 8 */
 	};

 	if (bands & BAND_AAC)
 		usr_vht_cap_info = adapter->usr_dot_11ac_dev_cap_a;
 	else
 		usr_vht_cap_info = adapter->usr_dot_11ac_dev_cap_bg;

 	/* find the max NSS supported */
 	nss = 0;
 	for (i = 0; i < 8; i++) {
 		max_mcs = (mcs_map >> (2 * i)) & 0x3;
 		if (max_mcs < 3)
 			nss = i;
 	}
 	max_mcs = (mcs_map >> (2 * nss)) & 0x3;

 	/* if max_mcs is 3, nss must be 0 (SS = 1). Thus, max mcs is MCS 9 */
 	if (max_mcs >= 3)
 		max_mcs = 2;

 	if (GET_VHTCAP_CHWDSET(usr_vht_cap_info)) {
 		/* support 160 MHz */
 		max_rate = max_rate_lgi_160MHZ[nss][max_mcs];
 		if (!max_rate)
 			/* MCS9 is not supported in NSS6 */
 			max_rate = max_rate_lgi_160MHZ[nss][max_mcs - 1];
 	} else {
 		max_rate = max_rate_lgi_80MHZ[nss][max_mcs];
 		if (!max_rate)
 			/* MCS9 is not supported in NSS3 */
 			max_rate = max_rate_lgi_80MHZ[nss][max_mcs - 1];
 	}

 	return max_rate;
 }

 static void
 mwifiex_fill_vht_cap_info(struct mwifiex_private *priv,
 			  struct mwifiex_ie_types_vhtcap *vht_cap, u8 bands)
 {
 	struct mwifiex_adapter *adapter = priv->adapter;

 	if (bands & BAND_A)
 		vht_cap->vht_cap.vht_cap_info =
 				cpu_to_le32(adapter->usr_dot_11ac_dev_cap_a);
 	else
 		vht_cap->vht_cap.vht_cap_info =
 				cpu_to_le32(adapter->usr_dot_11ac_dev_cap_bg);
 }

 static void
 mwifiex_fill_vht_cap_tlv(struct mwifiex_private *priv,
 			 struct mwifiex_ie_types_vhtcap *vht_cap, u8 bands)
 {
 	struct mwifiex_adapter *adapter = priv->adapter;
 	u16 mcs_map_user, mcs_map_resp, mcs_map_result;
 	u16 mcs_user, mcs_resp, nss, tmp;

 	/* Fill VHT cap info */
 	mwifiex_fill_vht_cap_info(priv, vht_cap, bands);

 	/* rx MCS Set: find the minimum of the user rx mcs and ap rx mcs */
 	mcs_map_user = GET_DEVRXMCSMAP(adapter->usr_dot_11ac_mcs_support);
 	mcs_map_resp = le16_to_cpu(vht_cap->vht_cap.supp_mcs.rx_mcs_map);
 	mcs_map_result = 0;

 	for (nss = 1; nss <= 8; nss++) {
 		mcs_user = GET_VHTNSSMCS(mcs_map_user, nss);
 		mcs_resp = GET_VHTNSSMCS(mcs_map_resp, nss);

 		if ((mcs_user == NO_NSS_SUPPORT) ||
 		    (mcs_resp == NO_NSS_SUPPORT))
 			SET_VHTNSSMCS(mcs_map_result, nss, NO_NSS_SUPPORT);
 		else
 			SET_VHTNSSMCS(mcs_map_result, nss,
 				      min(mcs_user, mcs_resp));
 	}

 	vht_cap->vht_cap.supp_mcs.rx_mcs_map = cpu_to_le16(mcs_map_result);

 	tmp = mwifiex_convert_mcsmap_to_maxrate(priv, bands, mcs_map_result);
 	vht_cap->vht_cap.supp_mcs.rx_highest = cpu_to_le16(tmp);

 	/* tx MCS Set: find the minimum of the user tx mcs and ap tx mcs */
 	mcs_map_user = GET_DEVTXMCSMAP(adapter->usr_dot_11ac_mcs_support);
 	mcs_map_resp = le16_to_cpu(vht_cap->vht_cap.supp_mcs.tx_mcs_map);
 	mcs_map_result = 0;

 	for (nss = 1; nss <= 8; nss++) {
 		mcs_user = GET_VHTNSSMCS(mcs_map_user, nss);
 		mcs_resp = GET_VHTNSSMCS(mcs_map_resp, nss);
 		if ((mcs_user == NO_NSS_SUPPORT) ||
 		    (mcs_resp == NO_NSS_SUPPORT))
 			SET_VHTNSSMCS(mcs_map_result, nss, NO_NSS_SUPPORT);
 		else
 			SET_VHTNSSMCS(mcs_map_result, nss,
 				      min(mcs_user, mcs_resp));
 	}

 	vht_cap->vht_cap.supp_mcs.tx_mcs_map = cpu_to_le16(mcs_map_result);

 	tmp = mwifiex_convert_mcsmap_to_maxrate(priv, bands, mcs_map_result);
 	vht_cap->vht_cap.supp_mcs.tx_highest = cpu_to_le16(tmp);

 	return;
 }

 int mwifiex_cmd_append_11ac_tlv(struct mwifiex_private *priv,
 			     struct mwifiex_bssdescriptor *bss_desc,
 			     u8 **buffer)
 {
 	struct mwifiex_ie_types_vhtcap *vht_cap;
 	struct mwifiex_ie_types_oper_mode_ntf *oper_ntf;
 	struct ieee_types_oper_mode_ntf *ieee_oper_ntf;
 	struct mwifiex_ie_types_vht_oper *vht_op;
 	struct mwifiex_adapter *adapter = priv->adapter;
 	u8 supp_chwd_set;
 	u32 usr_vht_cap_info;
 	int ret_len = 0;

 	if (bss_desc->bss_band & BAND_A)
 		usr_vht_cap_info = adapter->usr_dot_11ac_dev_cap_a;
 	else
 		usr_vht_cap_info = adapter->usr_dot_11ac_dev_cap_bg;

 	/* VHT Capabilities IE */
 	if (bss_desc->bcn_vht_cap) {
 		vht_cap = (struct mwifiex_ie_types_vhtcap *)*buffer;
 		memset(vht_cap, 0, sizeof(*vht_cap));
 		vht_cap->header.type = cpu_to_le16(WLAN_EID_VHT_CAPABILITY);
 		vht_cap->header.len  =
 				cpu_to_le16(sizeof(struct ieee80211_vht_cap));
 		memcpy((u8 *)vht_cap + sizeof(struct mwifiex_ie_types_header),
 		       (u8 *)bss_desc->bcn_vht_cap +
 		       sizeof(struct ieee_types_header),
 		       le16_to_cpu(vht_cap->header.len));

 		mwifiex_fill_vht_cap_tlv(priv, vht_cap, bss_desc->bss_band);
 		*buffer += sizeof(*vht_cap);
 		ret_len += sizeof(*vht_cap);
 	}

 	/* VHT Operation IE */
 	if (bss_desc->bcn_vht_oper) {
 		if (priv->bss_mode == NL80211_IFTYPE_STATION) {
 			vht_op = (struct mwifiex_ie_types_vht_oper *)*buffer;
 			memset(vht_op, 0, sizeof(*vht_op));
 			vht_op->header.type =
 					cpu_to_le16(WLAN_EID_VHT_OPERATION);
 			vht_op->header.len  = cpu_to_le16(sizeof(*vht_op) -
 				      sizeof(struct mwifiex_ie_types_header));
 			memcpy((u8 *)vht_op +
 				sizeof(struct mwifiex_ie_types_header),
 			       (u8 *)bss_desc->bcn_vht_oper +
 			       sizeof(struct ieee_types_header),
 			       le16_to_cpu(vht_op->header.len));

 			/* negotiate the channel width and central freq
 			 * and keep the central freq as the peer suggests
 			 */
 			supp_chwd_set = GET_VHTCAP_CHWDSET(usr_vht_cap_info);

 			switch (supp_chwd_set) {
 			case 0:
 				vht_op->chan_width =
 				     min_t(u8, IEEE80211_VHT_CHANWIDTH_80MHZ,
 					   bss_desc->bcn_vht_oper->chan_width);
 				break;
 			case 1:
 				vht_op->chan_width =
 				     min_t(u8, IEEE80211_VHT_CHANWIDTH_160MHZ,
 					   bss_desc->bcn_vht_oper->chan_width);
 				break;
 			case 2:
 				vht_op->chan_width =
 				     min_t(u8, IEEE80211_VHT_CHANWIDTH_80P80MHZ,
 					   bss_desc->bcn_vht_oper->chan_width);
 				break;
 			default:
 				vht_op->chan_width =
 				     IEEE80211_VHT_CHANWIDTH_USE_HT;
 				break;
 			}

 			*buffer += sizeof(*vht_op);
 			ret_len += sizeof(*vht_op);
 		}
 	}

 	/* Operating Mode Notification IE */
 	if (bss_desc->oper_mode) {
 		ieee_oper_ntf = bss_desc->oper_mode;
 		oper_ntf = (void *)*buffer;
 		memset(oper_ntf, 0, sizeof(*oper_ntf));
 		oper_ntf->header.type = cpu_to_le16(WLAN_EID_OPMODE_NOTIF);
 		oper_ntf->header.len = cpu_to_le16(sizeof(u8));
 		oper_ntf->oper_mode = ieee_oper_ntf->oper_mode;
 		*buffer += sizeof(*oper_ntf);
 		ret_len += sizeof(*oper_ntf);
 	}

 	return ret_len;
 }

 int mwifiex_cmd_11ac_cfg(struct mwifiex_private *priv,
 			 struct host_cmd_ds_command *cmd, u16 cmd_action,
 			 struct mwifiex_11ac_vht_cfg *cfg)
 {
 	struct host_cmd_11ac_vht_cfg *vhtcfg = &cmd->params.vht_cfg;

 	cmd->command = cpu_to_le16(HostCmd_CMD_11AC_CFG);
 	cmd->size = cpu_to_le16(sizeof(struct host_cmd_11ac_vht_cfg) +
 				S_DS_GEN);
 	vhtcfg->action = cpu_to_le16(cmd_action);
 	vhtcfg->band_config = cfg->band_config;
 	vhtcfg->misc_config = cfg->misc_config;
 	vhtcfg->cap_info = cpu_to_le32(cfg->cap_info);
 	vhtcfg->mcs_tx_set = cpu_to_le32(cfg->mcs_tx_set);
 	vhtcfg->mcs_rx_set = cpu_to_le32(cfg->mcs_rx_set);

 	return 0;
 }

 /* This function initializes the BlockACK setup information for given
  * mwifiex_private structure for 11ac enabled networks.
  */
 void mwifiex_set_11ac_ba_params(struct mwifiex_private *priv)
 {
 	priv->add_ba_param.timeout = MWIFIEX_DEFAULT_BLOCK_ACK_TIMEOUT;

 	if (GET_BSS_ROLE(priv) == MWIFIEX_BSS_ROLE_UAP) {
 		priv->add_ba_param.tx_win_size =
 					   MWIFIEX_11AC_UAP_AMPDU_DEF_TXWINSIZE;
 		priv->add_ba_param.rx_win_size =
 					   MWIFIEX_11AC_UAP_AMPDU_DEF_RXWINSIZE;
 	} else {
 		priv->add_ba_param.tx_win_size =
 					   MWIFIEX_11AC_STA_AMPDU_DEF_TXWINSIZE;
 		priv->add_ba_param.rx_win_size =
 					   MWIFIEX_11AC_STA_AMPDU_DEF_RXWINSIZE;
 	}

 	return;
 }
	/*
	* Marvell Wireless LAN device driver: 802.11ac
	*
	* Copyright (C) 2013, Marvell International Ltd.
	*
	* This software file (the "File") is distributed by Marvell International
	* Ltd. under the terms of the GNU General Public License Version 2, June 1991
	* (the "License"). You may use, redistribute and/or modify this File in
	* accordance with the terms and conditions of the License, a copy of which
	* is available by writing to the Free Software Foundation, Inc.,
	* 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA or on the
	* worldwide web at http://www.gnu.org/licenses/old-licenses/gpl-2.0.txt.
	*
	* THE FILE IS DISTRIBUTED AS-IS, WITHOUT WARRANTY OF ANY KIND, AND THE
	* IMPLIED WARRANTIES OF MERCHANTABILITY OR FITNESS FOR A PARTICULAR PURPOSE
	* ARE EXPRESSLY DISCLAIMED. The License provides additional details about
	* this warranty disclaimer.
	*/

	#include "decl.h"
	#include "ioctl.h"
	#include "fw.h"
	#include "main.h"
	#include "11ac.h"

	/* This function converts the 2-bit MCS map to the highest long GI
	* VHT data rate.
	*/
	static u16
	mwifiex_convert_mcsmap_to_maxrate(struct mwifiex_private *priv,
	u8 bands, u16 mcs_map)
	{
	u8 i, nss, max_mcs;
	u16 max_rate = 0;
	u32 usr_vht_cap_info = 0;
	struct mwifiex_adapter *adapter = priv->adapter;
	/* tables of the MCS map to the highest data rate (in Mbps)
	* supported for long GI
	*/
	u16 max_rate_lgi_80MHZ[8][3] = {
	{0x124, 0x15F, 0x186}, /* NSS = 1 */
	{0x249, 0x2BE, 0x30C}, /* NSS = 2 */
	{0x36D, 0x41D, 0x492}, /* NSS = 3 */
	{0x492, 0x57C, 0x618}, /* NSS = 4 */
	{0x5B6, 0x6DB, 0x79E}, /* NSS = 5 */
	{0x6DB, 0x83A, 0x0}, /* NSS = 6 */
	{0x7FF, 0x999, 0xAAA}, /* NSS = 7 */
	{0x924, 0xAF8, 0xC30} /* NSS = 8 */
	};
	u16 max_rate_lgi_160MHZ[8][3] = {
	{0x249, 0x2BE, 0x30C}, /* NSS = 1 */
	{0x492, 0x57C, 0x618}, /* NSS = 2 */
	{0x6DB, 0x83A, 0x0}, /* NSS = 3 */
	{0x924, 0xAF8, 0xC30}, /* NSS = 4 */
	{0xB6D, 0xDB6, 0xF3C}, /* NSS = 5 */
	{0xDB6, 0x1074, 0x1248}, /* NSS = 6 */
	{0xFFF, 0x1332, 0x1554}, /* NSS = 7 */
	{0x1248, 0x15F0, 0x1860} /* NSS = 8 */
	};

	if (bands & BAND_AAC)
	usr_vht_cap_info = adapter->usr_dot_11ac_dev_cap_a;
	else
	usr_vht_cap_info = adapter->usr_dot_11ac_dev_cap_bg;

	/* find the max NSS supported */
	nss = 0;
	for (i = 0; i < 8; i++) {
	max_mcs = (mcs_map >> (2 * i)) & 0x3;
	if (max_mcs < 3)
	nss = i;
	}
	max_mcs = (mcs_map >> (2 * nss)) & 0x3;

	/* if max_mcs is 3, nss must be 0 (SS = 1). Thus, max mcs is MCS 9 */
	if (max_mcs >= 3)
	max_mcs = 2;

	if (GET_VHTCAP_CHWDSET(usr_vht_cap_info)) {
	/* support 160 MHz */
	max_rate = max_rate_lgi_160MHZ[nss][max_mcs];
	if (!max_rate)
	/* MCS9 is not supported in NSS6 */
	max_rate = max_rate_lgi_160MHZ[nss][max_mcs - 1];
	} else {
	max_rate = max_rate_lgi_80MHZ[nss][max_mcs];
	if (!max_rate)
	/* MCS9 is not supported in NSS3 */
	max_rate = max_rate_lgi_80MHZ[nss][max_mcs - 1];
	}

	return max_rate;
	}

	static void
	mwifiex_fill_vht_cap_info(struct mwifiex_private *priv,
	struct mwifiex_ie_types_vhtcap *vht_cap, u8 bands)
	{
	struct mwifiex_adapter *adapter = priv->adapter;

	if (bands & BAND_A)
	vht_cap->vht_cap.vht_cap_info =
	cpu_to_le32(adapter->usr_dot_11ac_dev_cap_a);
	else
	vht_cap->vht_cap.vht_cap_info =
	cpu_to_le32(adapter->usr_dot_11ac_dev_cap_bg);
	}

	static void
	mwifiex_fill_vht_cap_tlv(struct mwifiex_private *priv,
	struct mwifiex_ie_types_vhtcap *vht_cap, u8 bands)
	{
	struct mwifiex_adapter *adapter = priv->adapter;
	u16 mcs_map_user, mcs_map_resp, mcs_map_result;
	u16 mcs_user, mcs_resp, nss, tmp;

	/* Fill VHT cap info */
	mwifiex_fill_vht_cap_info(priv, vht_cap, bands);

	/* rx MCS Set: find the minimum of the user rx mcs and ap rx mcs */
	mcs_map_user = GET_DEVRXMCSMAP(adapter->usr_dot_11ac_mcs_support);
	mcs_map_resp = le16_to_cpu(vht_cap->vht_cap.supp_mcs.rx_mcs_map);
	mcs_map_result = 0;

	for (nss = 1; nss <= 8; nss++) {
	mcs_user = GET_VHTNSSMCS(mcs_map_user, nss);
	mcs_resp = GET_VHTNSSMCS(mcs_map_resp, nss);

	if ((mcs_user == NO_NSS_SUPPORT) \|\|
	(mcs_resp == NO_NSS_SUPPORT))
	SET_VHTNSSMCS(mcs_map_result, nss, NO_NSS_SUPPORT);
	else
	SET_VHTNSSMCS(mcs_map_result, nss,
	min(mcs_user, mcs_resp));
	}

	vht_cap->vht_cap.supp_mcs.rx_mcs_map = cpu_to_le16(mcs_map_result);

	tmp = mwifiex_convert_mcsmap_to_maxrate(priv, bands, mcs_map_result);
	vht_cap->vht_cap.supp_mcs.rx_highest = cpu_to_le16(tmp);

	/* tx MCS Set: find the minimum of the user tx mcs and ap tx mcs */
	mcs_map_user = GET_DEVTXMCSMAP(adapter->usr_dot_11ac_mcs_support);
	mcs_map_resp = le16_to_cpu(vht_cap->vht_cap.supp_mcs.tx_mcs_map);
	mcs_map_result = 0;

	for (nss = 1; nss <= 8; nss++) {
	mcs_user = GET_VHTNSSMCS(mcs_map_user, nss);
	mcs_resp = GET_VHTNSSMCS(mcs_map_resp, nss);
	if ((mcs_user == NO_NSS_SUPPORT) \|\|
	(mcs_resp == NO_NSS_SUPPORT))
	SET_VHTNSSMCS(mcs_map_result, nss, NO_NSS_SUPPORT);
	else
	SET_VHTNSSMCS(mcs_map_result, nss,
	min(mcs_user, mcs_resp));
	}

	vht_cap->vht_cap.supp_mcs.tx_mcs_map = cpu_to_le16(mcs_map_result);

	tmp = mwifiex_convert_mcsmap_to_maxrate(priv, bands, mcs_map_result);
	vht_cap->vht_cap.supp_mcs.tx_highest = cpu_to_le16(tmp);

	return;
	}

	int mwifiex_cmd_append_11ac_tlv(struct mwifiex_private *priv,
	struct mwifiex_bssdescriptor *bss_desc,
	u8 **buffer)
	{
	struct mwifiex_ie_types_vhtcap *vht_cap;
	struct mwifiex_ie_types_oper_mode_ntf *oper_ntf;
	struct ieee_types_oper_mode_ntf *ieee_oper_ntf;
	struct mwifiex_ie_types_vht_oper *vht_op;
	struct mwifiex_adapter *adapter = priv->adapter;
	u8 supp_chwd_set;
	u32 usr_vht_cap_info;
	int ret_len = 0;

	if (bss_desc->bss_band & BAND_A)
	usr_vht_cap_info = adapter->usr_dot_11ac_dev_cap_a;
	else
	usr_vht_cap_info = adapter->usr_dot_11ac_dev_cap_bg;

	/* VHT Capabilities IE */
	if (bss_desc->bcn_vht_cap) {
	vht_cap = (struct mwifiex_ie_types_vhtcap )buffer;
	memset(vht_cap, 0, sizeof(*vht_cap));
	vht_cap->header.type = cpu_to_le16(WLAN_EID_VHT_CAPABILITY);
	vht_cap->header.len =
	cpu_to_le16(sizeof(struct ieee80211_vht_cap));
	memcpy((u8 *)vht_cap + sizeof(struct mwifiex_ie_types_header),
	(u8 *)bss_desc->bcn_vht_cap +
	sizeof(struct ieee_types_header),
	le16_to_cpu(vht_cap->header.len));

	mwifiex_fill_vht_cap_tlv(priv, vht_cap, bss_desc->bss_band);
	buffer += sizeof(vht_cap);
	ret_len += sizeof(*vht_cap);
	}

	/* VHT Operation IE */
	if (bss_desc->bcn_vht_oper) {
	if (priv->bss_mode == NL80211_IFTYPE_STATION) {
	vht_op = (struct mwifiex_ie_types_vht_oper )buffer;
	memset(vht_op, 0, sizeof(*vht_op));
	vht_op->header.type =
	cpu_to_le16(WLAN_EID_VHT_OPERATION);
	vht_op->header.len = cpu_to_le16(sizeof(*vht_op) -
	sizeof(struct mwifiex_ie_types_header));
	memcpy((u8 *)vht_op +
	sizeof(struct mwifiex_ie_types_header),
	(u8 *)bss_desc->bcn_vht_oper +
	sizeof(struct ieee_types_header),
	le16_to_cpu(vht_op->header.len));

	/* negotiate the channel width and central freq
	* and keep the central freq as the peer suggests
	*/
	supp_chwd_set = GET_VHTCAP_CHWDSET(usr_vht_cap_info);

	switch (supp_chwd_set) {
	case 0:
	vht_op->chan_width =
	min_t(u8, IEEE80211_VHT_CHANWIDTH_80MHZ,
	bss_desc->bcn_vht_oper->chan_width);
	break;
	case 1:
	vht_op->chan_width =
	min_t(u8, IEEE80211_VHT_CHANWIDTH_160MHZ,
	bss_desc->bcn_vht_oper->chan_width);
	break;
	case 2:
	vht_op->chan_width =
	min_t(u8, IEEE80211_VHT_CHANWIDTH_80P80MHZ,
	bss_desc->bcn_vht_oper->chan_width);
	break;
	default:
	vht_op->chan_width =
	IEEE80211_VHT_CHANWIDTH_USE_HT;
	break;
	}

	buffer += sizeof(vht_op);
	ret_len += sizeof(*vht_op);
	}
	}

	/* Operating Mode Notification IE */
	if (bss_desc->oper_mode) {
	ieee_oper_ntf = bss_desc->oper_mode;
	oper_ntf = (void )buffer;
	memset(oper_ntf, 0, sizeof(*oper_ntf));
	oper_ntf->header.type = cpu_to_le16(WLAN_EID_OPMODE_NOTIF);
	oper_ntf->header.len = cpu_to_le16(sizeof(u8));
	oper_ntf->oper_mode = ieee_oper_ntf->oper_mode;
	buffer += sizeof(oper_ntf);
	ret_len += sizeof(*oper_ntf);
	}

	return ret_len;
	}

	int mwifiex_cmd_11ac_cfg(struct mwifiex_private *priv,
	struct host_cmd_ds_command *cmd, u16 cmd_action,
	struct mwifiex_11ac_vht_cfg *cfg)
	{
	struct host_cmd_11ac_vht_cfg *vhtcfg = &cmd->params.vht_cfg;

	cmd->command = cpu_to_le16(HostCmd_CMD_11AC_CFG);
	cmd->size = cpu_to_le16(sizeof(struct host_cmd_11ac_vht_cfg) +
	S_DS_GEN);
	vhtcfg->action = cpu_to_le16(cmd_action);
	vhtcfg->band_config = cfg->band_config;
	vhtcfg->misc_config = cfg->misc_config;
	vhtcfg->cap_info = cpu_to_le32(cfg->cap_info);
	vhtcfg->mcs_tx_set = cpu_to_le32(cfg->mcs_tx_set);
	vhtcfg->mcs_rx_set = cpu_to_le32(cfg->mcs_rx_set);

	return 0;
	}

	/* This function initializes the BlockACK setup information for given
	* mwifiex_private structure for 11ac enabled networks.
	*/
	void mwifiex_set_11ac_ba_params(struct mwifiex_private *priv)
	{
	priv->add_ba_param.timeout = MWIFIEX_DEFAULT_BLOCK_ACK_TIMEOUT;

	if (GET_BSS_ROLE(priv) == MWIFIEX_BSS_ROLE_UAP) {
	priv->add_ba_param.tx_win_size =
	MWIFIEX_11AC_UAP_AMPDU_DEF_TXWINSIZE;
	priv->add_ba_param.rx_win_size =
	MWIFIEX_11AC_UAP_AMPDU_DEF_RXWINSIZE;
	} else {
	priv->add_ba_param.tx_win_size =
	MWIFIEX_11AC_STA_AMPDU_DEF_TXWINSIZE;
	priv->add_ba_param.rx_win_size =
	MWIFIEX_11AC_STA_AMPDU_DEF_RXWINSIZE;
	}

	return;
	}