wireless: mwifiex: initial commit for Marvell mwifiex driver

This driver adds WiFi support for Marvell 802.11n based chipsets
with SDIO interface. Currently only SD8787 is supported. More
chipsets will be supported later.

drivers/net/wireless/mwifiex/

Signed-off-by: Nishant Sarmukadam <nishants@marvell.com>
Signed-off-by: Amitkumar Karwar <akarwar@marvell.com>
Signed-off-by: Kiran Divekar <dkiran@marvell.com>
Signed-off-by: Bing Zhao <bzhao@marvell.com>
Signed-off-by: Yogesh Ashok Powar <yogeshp@marvell.com>
Signed-off-by: Marc Yang <yangyang@marvell.com>
Signed-off-by: Ramesh Radhakrishnan <rramesh@marvell.com>
Signed-off-by: Frank Huang <frankh@marvell.com>
Signed-off-by: John W. Linville <linville@tuxdriver.com>

1 files changed, 922 insertions, 0 deletions

diff --git a/drivers/net/wireless/mwifiex/11n.c b/drivers/net/wireless/mwifiex/11n.c
new file mode 100644
index 00000000000..0e04a21be0a
--- /dev/null
+++ b/drivers/net/wireless/mwifiex/11n.c
@@ -0,0 +1,922 @@
+/*
+ * Marvell Wireless LAN device driver: 802.11n
+ *
+ * Copyright (C) 2011, 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 "util.h"
+#include "fw.h"
+#include "main.h"
+#include "wmm.h"
+#include "11n.h"
+
+/*
+ * Fills HT capability information field, AMPDU Parameters field, HT extended
+ * capability field, and supported MCS set fields.
+ *
+ * Only the following HT capability information fields are used, all other
+ * fields are always turned off.
+ *
+ *  Bit 1 : Supported channel width (0: 20MHz, 1: Both 20 and 40 MHz)
+ *  Bit 4 : Greenfield support (0: Not supported, 1: Supported)
+ *  Bit 5 : Short GI for 20 MHz support (0: Not supported, 1: Supported)
+ *  Bit 6 : Short GI for 40 MHz support (0: Not supported, 1: Supported)
+ *  Bit 7 : Tx STBC (0: Not supported, 1: Supported)
+ *  Bit 8-9 : Rx STBC (0: Not supported, X: Support for up to X spatial streams)
+ *  Bit 10 : Delayed BA support (0: Not supported, 1: Supported)
+ *  Bit 11 : Maximum AMSDU length (0: 3839 octets, 1: 7935 octets)
+ *  Bit 14 : 40-Mhz intolerant support (0: Not supported, 1: Supported)
+ *
+ *  In addition, the following AMPDU Parameters are set -
+ *      - Maximum AMPDU length exponent (set to 3)
+ *      - Minimum AMPDU start spacing (set to 0 - No restrictions)
+ *
+ *  MCS is set for 1x1, with MSC32 for infra mode or ad-hoc mode with 40 MHz
+ *  support.
+ *
+ *  RD responder bit to set to clear in the extended capability header.
+ */
+void
+mwifiex_fill_cap_info(struct mwifiex_private *priv,
+		      struct mwifiex_ie_types_htcap *ht_cap)
+{
+	struct mwifiex_adapter *adapter = priv->adapter;
+	u8 *mcs;
+	int rx_mcs_supp;
+	uint16_t ht_cap_info = le16_to_cpu(ht_cap->ht_cap.cap_info);
+	uint16_t ht_ext_cap = le16_to_cpu(ht_cap->ht_cap.extended_ht_cap_info);
+
+	if (ISSUPP_CHANWIDTH40(adapter->hw_dot_11n_dev_cap) &&
+	    ISSUPP_CHANWIDTH40(adapter->usr_dot_11n_dev_cap))
+		SETHT_SUPPCHANWIDTH(ht_cap_info);
+	else
+		RESETHT_SUPPCHANWIDTH(ht_cap_info);
+
+	if (ISSUPP_GREENFIELD(adapter->hw_dot_11n_dev_cap) &&
+	    ISSUPP_GREENFIELD(adapter->usr_dot_11n_dev_cap))
+		SETHT_GREENFIELD(ht_cap_info);
+	else
+		RESETHT_GREENFIELD(ht_cap_info);
+
+	if (ISSUPP_SHORTGI20(adapter->hw_dot_11n_dev_cap) &&
+	    ISSUPP_SHORTGI20(adapter->usr_dot_11n_dev_cap))
+		SETHT_SHORTGI20(ht_cap_info);
+	else
+		RESETHT_SHORTGI20(ht_cap_info);
+
+	if (ISSUPP_SHORTGI40(adapter->hw_dot_11n_dev_cap) &&
+	    ISSUPP_SHORTGI40(adapter->usr_dot_11n_dev_cap))
+		SETHT_SHORTGI40(ht_cap_info);
+	else
+		RESETHT_SHORTGI40(ht_cap_info);
+
+	/* No user config for RX STBC yet */
+	if (ISSUPP_RXSTBC(adapter->hw_dot_11n_dev_cap)
+	    && ISSUPP_RXSTBC(adapter->usr_dot_11n_dev_cap))
+		SETHT_RXSTBC(ht_cap_info, 1);
+	else
+		RESETHT_RXSTBC(ht_cap_info);
+
+	/* No user config for TX STBC yet */
+	if (ISSUPP_TXSTBC(adapter->hw_dot_11n_dev_cap))
+		SETHT_TXSTBC(ht_cap_info);
+	else
+		RESETHT_TXSTBC(ht_cap_info);
+
+	/* No user config for Delayed BACK yet */
+	if (GET_DELAYEDBACK(adapter->hw_dot_11n_dev_cap))
+		SETHT_DELAYEDBACK(ht_cap_info);
+	else
+		RESETHT_DELAYEDBACK(ht_cap_info);
+
+	if (ISENABLED_40MHZ_INTOLARENT(adapter->usr_dot_11n_dev_cap))
+		SETHT_40MHZ_INTOLARANT(ht_cap_info);
+	else
+		RESETHT_40MHZ_INTOLARANT(ht_cap_info);
+
+	SETAMPDU_SIZE(ht_cap->ht_cap.ampdu_params_info, AMPDU_FACTOR_64K);
+	SETAMPDU_SPACING(ht_cap->ht_cap.ampdu_params_info, 0);
+
+	/* Need change to support 8k AMSDU receive */
+	RESETHT_MAXAMSDU(ht_cap_info);
+
+	rx_mcs_supp = GET_RXMCSSUPP(adapter->hw_dev_mcs_support);
+
+	mcs = (u8 *)&ht_cap->ht_cap.mcs;
+
+	/* Set MCS for 1x1 */
+	memset(mcs, 0xff, rx_mcs_supp);
+
+	/* Clear all the other values */
+	memset(&mcs[rx_mcs_supp], 0,
+			sizeof(struct ieee80211_mcs_info) - rx_mcs_supp);
+
+	if (priv->bss_mode == MWIFIEX_BSS_MODE_INFRA ||
+	    (ISSUPP_CHANWIDTH40(adapter->hw_dot_11n_dev_cap) &&
+	     ISSUPP_CHANWIDTH40(adapter->usr_dot_11n_dev_cap)))
+		/* Set MCS32 for infra mode or ad-hoc mode with 40MHz support */
+		SETHT_MCS32(ht_cap->ht_cap.mcs.rx_mask);
+
+	/* Clear RD responder bit */
+	RESETHT_EXTCAP_RDG(ht_ext_cap);
+
+	ht_cap->ht_cap.cap_info = cpu_to_le16(ht_cap_info);
+	ht_cap->ht_cap.extended_ht_cap_info = cpu_to_le16(ht_ext_cap);
+}
+
+/*
+ * Shows HT capability information fields.
+ *
+ * The following HT capability information fields are supported.
+ *      - Maximum AMSDU length (3839 bytes or 7935 bytes)
+ *      - Beam forming support
+ *      - Greenfield preamble support
+ *      - AMPDU support
+ *      - MIMO Power Save support
+ *      - Rx STBC support
+ *      - Tx STBC support
+ *      - Short GI for 20 MHz support
+ *      - Short GI for 40 MHz support
+ *      - LDPC coded packets receive support
+ *      - Number of delayed BA streams
+ *      - Number of immediate BA streams
+ *      - 10 MHz channel width support
+ *      - 20 MHz channel width support
+ *      - 40 MHz channel width support
+ *      - Presence of Tx antenna A/B/C/D
+ *      - Presence of Rx antenna A/B/C/D
+ */
+void
+mwifiex_show_dot_11n_dev_cap(struct mwifiex_adapter *adapter, u32 cap)
+{
+	dev_dbg(adapter->dev, "info: GET_HW_SPEC: Max MSDU len = %s octets\n",
+	       (ISSUPP_MAXAMSDU(cap) ? "7935" : "3839"));
+	dev_dbg(adapter->dev, "info: GET_HW_SPEC: Beam forming %s\n",
+	       (ISSUPP_BEAMFORMING(cap) ? "supported" : "not supported"));
+	dev_dbg(adapter->dev, "info: GET_HW_SPEC: Greenfield preamble %s\n",
+	       (ISSUPP_GREENFIELD(cap) ? "supported" : "not supported"));
+	dev_dbg(adapter->dev, "info: GET_HW_SPEC: AMPDU %s\n",
+	       (ISSUPP_AMPDU(cap) ? "supported" : "not supported"));
+	dev_dbg(adapter->dev, "info: GET_HW_SPEC: MIMO Power Save %s\n",
+	       (ISSUPP_MIMOPS(cap) ? "supported" : "not supported"));
+	dev_dbg(adapter->dev, "info: GET_HW_SPEC: Rx STBC %s\n",
+	       (ISSUPP_RXSTBC(cap) ? "supported" : "not supported"));
+	dev_dbg(adapter->dev, "info: GET_HW_SPEC: Tx STBC %s\n",
+	       (ISSUPP_TXSTBC(cap) ? "supported" : "not supported"));
+	dev_dbg(adapter->dev, "info: GET_HW_SPEC: Short GI for 40 Mhz %s\n",
+	       (ISSUPP_SHORTGI40(cap) ? "supported" : "not supported"));
+	dev_dbg(adapter->dev, "info: GET_HW_SPEC: Short GI for 20 Mhz %s\n",
+	       (ISSUPP_SHORTGI20(cap) ? "supported" : "not supported"));
+	dev_dbg(adapter->dev, "info: GET_HW_SPEC: LDPC coded packet receive %s\n",
+	       (ISSUPP_RXLDPC(cap) ? "supported" : "not supported"));
+	dev_dbg(adapter->dev,
+		"info: GET_HW_SPEC: Number of Delayed Block Ack streams = %d\n",
+	       GET_DELAYEDBACK(cap));
+	dev_dbg(adapter->dev,
+		"info: GET_HW_SPEC: Number of Immediate Block Ack streams = %d\n",
+	       GET_IMMEDIATEBACK(cap));
+	dev_dbg(adapter->dev, "info: GET_HW_SPEC: 40 Mhz channel width %s\n",
+	       (ISSUPP_CHANWIDTH40(cap) ? "supported" : "not supported"));
+	dev_dbg(adapter->dev, "info: GET_HW_SPEC: 20 Mhz channel width %s\n",
+	       (ISSUPP_CHANWIDTH20(cap) ? "supported" : "not supported"));
+	dev_dbg(adapter->dev, "info: GET_HW_SPEC: 10 Mhz channel width %s\n",
+	       (ISSUPP_CHANWIDTH10(cap) ? "supported" : "not supported"));
+
+	if (ISSUPP_RXANTENNAA(cap))
+		dev_dbg(adapter->dev, "info: GET_HW_SPEC: Prescence of Rx antennea A\n");
+
+	if (ISSUPP_RXANTENNAB(cap))
+		dev_dbg(adapter->dev, "info: GET_HW_SPEC: Prescence of Rx antennea B\n");
+
+	if (ISSUPP_RXANTENNAC(cap))
+		dev_dbg(adapter->dev, "info: GET_HW_SPEC: Prescence of Rx antennea C\n");
+
+	if (ISSUPP_RXANTENNAD(cap))
+		dev_dbg(adapter->dev, "info: GET_HW_SPEC: Prescence of Rx antennea D\n");
+
+	if (ISSUPP_TXANTENNAA(cap))
+		dev_dbg(adapter->dev, "info: GET_HW_SPEC: Prescence of Tx antennea A\n");
+
+	if (ISSUPP_TXANTENNAB(cap))
+		dev_dbg(adapter->dev, "info: GET_HW_SPEC: Prescence of Tx antennea B\n");
+
+	if (ISSUPP_TXANTENNAC(cap))
+		dev_dbg(adapter->dev, "info: GET_HW_SPEC: Prescence of Tx antennea C\n");
+
+	if (ISSUPP_TXANTENNAD(cap))
+		dev_dbg(adapter->dev, "info: GET_HW_SPEC: Prescence of Tx antennea D\n");
+
+	return;
+}
+
+/*
+ * Shows HT MCS support field.
+ */
+void
+mwifiex_show_dev_mcs_support(struct mwifiex_adapter *adapter, u8 support)
+{
+	dev_dbg(adapter->dev, "info: GET_HW_SPEC: MCSs for %dx%d MIMO\n",
+	       GET_RXMCSSUPP(support), GET_TXMCSSUPP(support));
+	return;
+}
+
+/*
+ * This function returns the pointer to an entry in BA Stream
+ * table which matches the requested BA status.
+ */
+static struct mwifiex_tx_ba_stream_tbl *
+mwifiex_11n_get_tx_ba_stream_status(struct mwifiex_private *priv,
+				  enum mwifiex_ba_status ba_status)
+{
+	struct mwifiex_tx_ba_stream_tbl *tx_ba_tsr_tbl;
+	unsigned long flags;
+
+	spin_lock_irqsave(&priv->tx_ba_stream_tbl_lock, flags);
+	list_for_each_entry(tx_ba_tsr_tbl, &priv->tx_ba_stream_tbl_ptr, list) {
+		if (tx_ba_tsr_tbl->ba_status == ba_status) {
+			spin_unlock_irqrestore(&priv->tx_ba_stream_tbl_lock,
+					       flags);
+			return tx_ba_tsr_tbl;
+		}
+	}
+	spin_unlock_irqrestore(&priv->tx_ba_stream_tbl_lock, flags);
+	return NULL;
+}
+
+/*
+ * This function handles the command response of delete a block
+ * ack request.
+ *
+ * The function checks the response success status and takes action
+ * accordingly (send an add BA request in case of success, or recreate
+ * the deleted stream in case of failure, if the add BA was also
+ * initiated by us).
+ */
+int mwifiex_ret_11n_delba(struct mwifiex_private *priv,
+			  struct host_cmd_ds_command *resp)
+{
+	int tid;
+	struct mwifiex_tx_ba_stream_tbl *tx_ba_tbl;
+	struct host_cmd_ds_11n_delba *del_ba =
+		(struct host_cmd_ds_11n_delba *) &resp->params.del_ba;
+	uint16_t del_ba_param_set = le16_to_cpu(del_ba->del_ba_param_set);
+
+	tid = del_ba_param_set >> DELBA_TID_POS;
+	if (del_ba->del_result == BA_RESULT_SUCCESS) {
+		mwifiex_11n_delete_ba_stream_tbl(priv, tid,
+				del_ba->peer_mac_addr, TYPE_DELBA_SENT,
+				INITIATOR_BIT(del_ba_param_set));
+
+		tx_ba_tbl = mwifiex_11n_get_tx_ba_stream_status(priv,
+						BA_STREAM_SETUP_INPROGRESS);
+		if (tx_ba_tbl)
+			mwifiex_send_addba(priv, tx_ba_tbl->tid,
+					   tx_ba_tbl->ra);
+	} else { /*
+		  * In case of failure, recreate the deleted stream in case
+		  * we initiated the ADDBA
+		  */
+		if (INITIATOR_BIT(del_ba_param_set)) {
+			mwifiex_11n_create_tx_ba_stream_tbl(priv,
+					del_ba->peer_mac_addr, tid,
+					BA_STREAM_SETUP_INPROGRESS);
+
+			tx_ba_tbl = mwifiex_11n_get_tx_ba_stream_status(priv,
+					BA_STREAM_SETUP_INPROGRESS);
+			if (tx_ba_tbl)
+				mwifiex_11n_delete_ba_stream_tbl(priv,
+						tx_ba_tbl->tid, tx_ba_tbl->ra,
+						TYPE_DELBA_SENT, true);
+		}
+	}
+
+	return 0;
+}
+
+/*
+ * This function handles the command response of add a block
+ * ack request.
+ *
+ * Handling includes changing the header fields to CPU formats, checking
+ * the response success status and taking actions accordingly (delete the
+ * BA stream table in case of failure).
+ */
+int mwifiex_ret_11n_addba_req(struct mwifiex_private *priv,
+			      struct host_cmd_ds_command *resp)
+{
+	int tid;
+	struct host_cmd_ds_11n_addba_rsp *add_ba_rsp =
+		(struct host_cmd_ds_11n_addba_rsp *) &resp->params.add_ba_rsp;
+	struct mwifiex_tx_ba_stream_tbl *tx_ba_tbl;
+
+	add_ba_rsp->ssn = cpu_to_le16((le16_to_cpu(add_ba_rsp->ssn))
+			& SSN_MASK);
+
+	tid = (le16_to_cpu(add_ba_rsp->block_ack_param_set)
+		& IEEE80211_ADDBA_PARAM_TID_MASK)
+		>> BLOCKACKPARAM_TID_POS;
+	if (le16_to_cpu(add_ba_rsp->status_code) == BA_RESULT_SUCCESS) {
+		tx_ba_tbl = mwifiex_11n_get_tx_ba_stream_tbl(priv, tid,
+						add_ba_rsp->peer_mac_addr);
+		if (tx_ba_tbl) {
+			dev_dbg(priv->adapter->dev, "info: BA stream complete\n");
+			tx_ba_tbl->ba_status = BA_STREAM_SETUP_COMPLETE;
+		} else {
+			dev_err(priv->adapter->dev, "BA stream not created\n");
+		}
+	} else {
+		mwifiex_11n_delete_ba_stream_tbl(priv, tid,
+						add_ba_rsp->peer_mac_addr,
+						TYPE_DELBA_SENT, true);
+		if (add_ba_rsp->add_rsp_result != BA_RESULT_TIMEOUT)
+			priv->aggr_prio_tbl[tid].ampdu_ap =
+				BA_STREAM_NOT_ALLOWED;
+	}
+
+	return 0;
+}
+
+/*
+ * This function handles the command response of 11n configuration request.
+ *
+ * Handling includes changing the header fields into CPU format.
+ */
+int mwifiex_ret_11n_cfg(struct mwifiex_private *priv,
+			struct host_cmd_ds_command *resp,
+			void *data_buf)
+{
+	struct mwifiex_ds_11n_tx_cfg *tx_cfg = NULL;
+	struct host_cmd_ds_11n_cfg *htcfg = &resp->params.htcfg;
+
+	if (data_buf) {
+		tx_cfg = (struct mwifiex_ds_11n_tx_cfg *) data_buf;
+		tx_cfg->tx_htcap = le16_to_cpu(htcfg->ht_tx_cap);
+		tx_cfg->tx_htinfo = le16_to_cpu(htcfg->ht_tx_info);
+	}
+	return 0;
+}
+
+/*
+ * This function prepares command of reconfigure Tx buffer.
+ *
+ * Preparation includes -
+ *      - Setting command ID, action and proper size
+ *      - Setting Tx buffer size (for SET only)
+ *      - Ensuring correct endian-ness
+ */
+int mwifiex_cmd_recfg_tx_buf(struct mwifiex_private *priv,
+			     struct host_cmd_ds_command *cmd, int cmd_action,
+			     void *data_buf)
+{
+	struct host_cmd_ds_txbuf_cfg *tx_buf = &cmd->params.tx_buf;
+	u16 action = (u16) cmd_action;
+	u16 buf_size = *((u16 *) data_buf);
+
+	cmd->command = cpu_to_le16(HostCmd_CMD_RECONFIGURE_TX_BUFF);
+	cmd->size =
+		cpu_to_le16(sizeof(struct host_cmd_ds_txbuf_cfg) + S_DS_GEN);
+	tx_buf->action = cpu_to_le16(action);
+	switch (action) {
+	case HostCmd_ACT_GEN_SET:
+		dev_dbg(priv->adapter->dev, "cmd: set tx_buf=%d\n", buf_size);
+		tx_buf->buff_size = cpu_to_le16(buf_size);
+		break;
+	case HostCmd_ACT_GEN_GET:
+	default:
+		tx_buf->buff_size = 0;
+		break;
+	}
+	return 0;
+}
+
+/*
+ * This function prepares command of AMSDU aggregation control.
+ *
+ * Preparation includes -
+ *      - Setting command ID, action and proper size
+ *      - Setting AMSDU control parameters (for SET only)
+ *      - Ensuring correct endian-ness
+ */
+int mwifiex_cmd_amsdu_aggr_ctrl(struct mwifiex_private *priv,
+				struct host_cmd_ds_command *cmd,
+				int cmd_action, void *data_buf)
+{
+	struct host_cmd_ds_amsdu_aggr_ctrl *amsdu_ctrl =
+		&cmd->params.amsdu_aggr_ctrl;
+	u16 action = (u16) cmd_action;
+	struct mwifiex_ds_11n_amsdu_aggr_ctrl *aa_ctrl =
+		(struct mwifiex_ds_11n_amsdu_aggr_ctrl *) data_buf;
+
+	cmd->command = cpu_to_le16(HostCmd_CMD_AMSDU_AGGR_CTRL);
+	cmd->size = cpu_to_le16(sizeof(struct host_cmd_ds_amsdu_aggr_ctrl)
+				+ S_DS_GEN);
+	amsdu_ctrl->action = cpu_to_le16(action);
+	switch (action) {
+	case HostCmd_ACT_GEN_SET:
+		amsdu_ctrl->enable = cpu_to_le16(aa_ctrl->enable);
+		amsdu_ctrl->curr_buf_size = 0;
+		break;
+	case HostCmd_ACT_GEN_GET:
+	default:
+		amsdu_ctrl->curr_buf_size = 0;
+		break;
+	}
+	return 0;
+}
+
+/*
+ * This function handles the command response of AMSDU aggregation
+ * control request.
+ *
+ * Handling includes changing the header fields into CPU format.
+ */
+int mwifiex_ret_amsdu_aggr_ctrl(struct mwifiex_private *priv,
+				struct host_cmd_ds_command *resp,
+				void *data_buf)
+{
+	struct mwifiex_ds_11n_amsdu_aggr_ctrl *amsdu_aggr_ctrl = NULL;
+	struct host_cmd_ds_amsdu_aggr_ctrl *amsdu_ctrl =
+		&resp->params.amsdu_aggr_ctrl;
+
+	if (data_buf) {
+		amsdu_aggr_ctrl =
+			(struct mwifiex_ds_11n_amsdu_aggr_ctrl *) data_buf;
+		amsdu_aggr_ctrl->enable = le16_to_cpu(amsdu_ctrl->enable);
+		amsdu_aggr_ctrl->curr_buf_size =
+			le16_to_cpu(amsdu_ctrl->curr_buf_size);
+	}
+	return 0;
+}
+
+/*
+ * This function prepares 11n configuration command.
+ *
+ * Preparation includes -
+ *      - Setting command ID, action and proper size
+ *      - Setting HT Tx capability and HT Tx information fields
+ *      - Ensuring correct endian-ness
+ */
+int mwifiex_cmd_11n_cfg(struct mwifiex_private *priv,
+			struct host_cmd_ds_command *cmd,
+			u16 cmd_action, void *data_buf)
+{
+	struct host_cmd_ds_11n_cfg *htcfg = &cmd->params.htcfg;
+	struct mwifiex_ds_11n_tx_cfg *txcfg =
+		(struct mwifiex_ds_11n_tx_cfg *) data_buf;
+
+	cmd->command = cpu_to_le16(HostCmd_CMD_11N_CFG);
+	cmd->size = cpu_to_le16(sizeof(struct host_cmd_ds_11n_cfg) + S_DS_GEN);
+	htcfg->action = cpu_to_le16(cmd_action);
+	htcfg->ht_tx_cap = cpu_to_le16(txcfg->tx_htcap);
+	htcfg->ht_tx_info = cpu_to_le16(txcfg->tx_htinfo);
+	return 0;
+}
+
+/*
+ * This function appends an 11n TLV to a buffer.
+ *
+ * Buffer allocation is responsibility of the calling
+ * function. No size validation is made here.
+ *
+ * The function fills up the following sections, if applicable -
+ *      - HT capability IE
+ *      - HT information IE (with channel list)
+ *      - 20/40 BSS Coexistence IE
+ *      - HT Extended Capabilities IE
+ */
+int
+mwifiex_cmd_append_11n_tlv(struct mwifiex_private *priv,
+			   struct mwifiex_bssdescriptor *bss_desc,
+			   u8 **buffer)
+{
+	struct mwifiex_ie_types_htcap *ht_cap;
+	struct mwifiex_ie_types_htinfo *ht_info;
+	struct mwifiex_ie_types_chan_list_param_set *chan_list;
+	struct mwifiex_ie_types_2040bssco *bss_co_2040;
+	struct mwifiex_ie_types_extcap *ext_cap;
+	int ret_len = 0;
+
+	if (!buffer || !*buffer)
+		return ret_len;
+
+	if (bss_desc->bcn_ht_cap) {
+		ht_cap = (struct mwifiex_ie_types_htcap *) *buffer;
+		memset(ht_cap, 0, sizeof(struct mwifiex_ie_types_htcap));
+		ht_cap->header.type = cpu_to_le16(WLAN_EID_HT_CAPABILITY);
+		ht_cap->header.len =
+				cpu_to_le16(sizeof(struct ieee80211_ht_cap));
+		memcpy((u8 *) ht_cap + sizeof(struct mwifiex_ie_types_header),
+		       (u8 *) bss_desc->bcn_ht_cap +
+		       sizeof(struct ieee_types_header),
+		       le16_to_cpu(ht_cap->header.len));
+
+		mwifiex_fill_cap_info(priv, ht_cap);
+
+		*buffer += sizeof(struct mwifiex_ie_types_htcap);
+		ret_len += sizeof(struct mwifiex_ie_types_htcap);
+	}
+
+	if (bss_desc->bcn_ht_info) {
+		if (priv->bss_mode == MWIFIEX_BSS_MODE_IBSS) {
+			ht_info = (struct mwifiex_ie_types_htinfo *) *buffer;
+			memset(ht_info, 0,
+			       sizeof(struct mwifiex_ie_types_htinfo));
+			ht_info->header.type =
+					cpu_to_le16(WLAN_EID_HT_INFORMATION);
+			ht_info->header.len =
+				cpu_to_le16(sizeof(struct ieee80211_ht_info));
+
+			memcpy((u8 *) ht_info +
+			       sizeof(struct mwifiex_ie_types_header),
+			       (u8 *) bss_desc->bcn_ht_info +
+			       sizeof(struct ieee_types_header),
+			       le16_to_cpu(ht_info->header.len));
+
+			if (!ISSUPP_CHANWIDTH40
+			    (priv->adapter->hw_dot_11n_dev_cap)
+			    || !ISSUPP_CHANWIDTH40(priv->adapter->
+						   usr_dot_11n_dev_cap))
+				RESET_CHANWIDTH40(ht_info->ht_info.ht_param);
+
+			*buffer += sizeof(struct mwifiex_ie_types_htinfo);
+			ret_len += sizeof(struct mwifiex_ie_types_htinfo);
+		}
+
+		chan_list =
+			(struct mwifiex_ie_types_chan_list_param_set *) *buffer;
+		memset(chan_list, 0,
+		       sizeof(struct mwifiex_ie_types_chan_list_param_set));
+		chan_list->header.type = cpu_to_le16(TLV_TYPE_CHANLIST);
+		chan_list->header.len = cpu_to_le16(
+			sizeof(struct mwifiex_ie_types_chan_list_param_set) -
+			sizeof(struct mwifiex_ie_types_header));
+		chan_list->chan_scan_param[0].chan_number =
+			bss_desc->bcn_ht_info->control_chan;
+		chan_list->chan_scan_param[0].radio_type =
+			mwifiex_band_to_radio_type((u8) bss_desc->bss_band);
+
+		if ((ISSUPP_CHANWIDTH40(priv->adapter->hw_dot_11n_dev_cap) &&
+		     ISSUPP_CHANWIDTH40(priv->adapter->usr_dot_11n_dev_cap))
+		    && ISALLOWED_CHANWIDTH40(bss_desc->bcn_ht_info->ht_param))
+			SET_SECONDARYCHAN(chan_list->chan_scan_param[0].
+					  radio_type,
+					  GET_SECONDARYCHAN(bss_desc->
+					  bcn_ht_info->ht_param));
+
+		*buffer += sizeof(struct mwifiex_ie_types_chan_list_param_set);
+		ret_len += sizeof(struct mwifiex_ie_types_chan_list_param_set);
+	}
+
+	if (bss_desc->bcn_bss_co_2040) {
+		bss_co_2040 = (struct mwifiex_ie_types_2040bssco *) *buffer;
+		memset(bss_co_2040, 0,
+		       sizeof(struct mwifiex_ie_types_2040bssco));
+		bss_co_2040->header.type = cpu_to_le16(WLAN_EID_BSS_COEX_2040);
+		bss_co_2040->header.len =
+		       cpu_to_le16(sizeof(bss_co_2040->bss_co_2040));
+
+		memcpy((u8 *) bss_co_2040 +
+		       sizeof(struct mwifiex_ie_types_header),
+		       (u8 *) bss_desc->bcn_bss_co_2040 +
+		       sizeof(struct ieee_types_header),
+		       le16_to_cpu(bss_co_2040->header.len));
+
+		*buffer += sizeof(struct mwifiex_ie_types_2040bssco);
+		ret_len += sizeof(struct mwifiex_ie_types_2040bssco);
+	}
+
+	if (bss_desc->bcn_ext_cap) {
+		ext_cap = (struct mwifiex_ie_types_extcap *) *buffer;
+		memset(ext_cap, 0, sizeof(struct mwifiex_ie_types_extcap));
+		ext_cap->header.type = cpu_to_le16(WLAN_EID_EXT_CAPABILITY);
+		ext_cap->header.len = cpu_to_le16(sizeof(ext_cap->ext_cap));
+
+		memcpy((u8 *) ext_cap +
+		       sizeof(struct mwifiex_ie_types_header),
+		       (u8 *) bss_desc->bcn_ext_cap +
+		       sizeof(struct ieee_types_header),
+		       le16_to_cpu(ext_cap->header.len));
+
+		*buffer += sizeof(struct mwifiex_ie_types_extcap);
+		ret_len += sizeof(struct mwifiex_ie_types_extcap);
+	}
+
+	return ret_len;
+}
+
+/*
+ * This function reconfigures the Tx buffer size in firmware.
+ *
+ * This function prepares a firmware command and issues it, if
+ * the current Tx buffer size is different from the one requested.
+ * Maximum configurable Tx buffer size is limited by the HT capability
+ * field value.
+ */
+void
+mwifiex_cfg_tx_buf(struct mwifiex_private *priv,
+		   struct mwifiex_bssdescriptor *bss_desc)
+{
+	u16 max_amsdu = MWIFIEX_TX_DATA_BUF_SIZE_2K;
+	u16 tx_buf = 0;
+	u16 curr_tx_buf_size = 0;
+
+	if (bss_desc->bcn_ht_cap) {
+		if (GETHT_MAXAMSDU(le16_to_cpu(bss_desc->bcn_ht_cap->cap_info)))
+			max_amsdu = MWIFIEX_TX_DATA_BUF_SIZE_8K;
+		else
+			max_amsdu = MWIFIEX_TX_DATA_BUF_SIZE_4K;
+	}
+
+	tx_buf = min(priv->adapter->max_tx_buf_size, max_amsdu);
+
+	dev_dbg(priv->adapter->dev, "info: max_amsdu=%d, max_tx_buf=%d\n",
+			max_amsdu, priv->adapter->max_tx_buf_size);
+
+	if (priv->adapter->curr_tx_buf_size <= MWIFIEX_TX_DATA_BUF_SIZE_2K)
+		curr_tx_buf_size = MWIFIEX_TX_DATA_BUF_SIZE_2K;
+	else if (priv->adapter->curr_tx_buf_size <= MWIFIEX_TX_DATA_BUF_SIZE_4K)
+		curr_tx_buf_size = MWIFIEX_TX_DATA_BUF_SIZE_4K;
+	else if (priv->adapter->curr_tx_buf_size <= MWIFIEX_TX_DATA_BUF_SIZE_8K)
+		curr_tx_buf_size = MWIFIEX_TX_DATA_BUF_SIZE_8K;
+	if (curr_tx_buf_size != tx_buf)
+		mwifiex_prepare_cmd(priv, HostCmd_CMD_RECONFIGURE_TX_BUFF,
+			HostCmd_ACT_GEN_SET, 0,
+			NULL, &tx_buf);
+
+	return;
+}
+
+/*
+ * This function checks if the given pointer is valid entry of
+ * Tx BA Stream table.
+ */
+static int mwifiex_is_tx_ba_stream_ptr_valid(struct mwifiex_private *priv,
+				struct mwifiex_tx_ba_stream_tbl *tx_tbl_ptr)
+{
+	struct mwifiex_tx_ba_stream_tbl *tx_ba_tsr_tbl;
+
+	list_for_each_entry(tx_ba_tsr_tbl, &priv->tx_ba_stream_tbl_ptr, list) {
+		if (tx_ba_tsr_tbl == tx_tbl_ptr)
+			return true;
+	}
+
+	return false;
+}
+
+/*
+ * This function deletes the given entry in Tx BA Stream table.
+ *
+ * The function also performs a validity check on the supplied
+ * pointer before trying to delete.
+ */
+void mwifiex_11n_delete_tx_ba_stream_tbl_entry(struct mwifiex_private *priv,
+				struct mwifiex_tx_ba_stream_tbl *tx_ba_tsr_tbl)
+{
+	if (!tx_ba_tsr_tbl &&
+			mwifiex_is_tx_ba_stream_ptr_valid(priv, tx_ba_tsr_tbl))
+		return;
+
+	dev_dbg(priv->adapter->dev, "info: tx_ba_tsr_tbl %p\n", tx_ba_tsr_tbl);
+
+	list_del(&tx_ba_tsr_tbl->list);
+
+	kfree(tx_ba_tsr_tbl);
+
+	return;
+}
+
+/*
+ * This function deletes all the entries in Tx BA Stream table.
+ */
+void mwifiex_11n_delete_all_tx_ba_stream_tbl(struct mwifiex_private *priv)
+{
+	int i;
+	struct mwifiex_tx_ba_stream_tbl *del_tbl_ptr, *tmp_node;
+	unsigned long flags;
+
+	spin_lock_irqsave(&priv->tx_ba_stream_tbl_lock, flags);
+	list_for_each_entry_safe(del_tbl_ptr, tmp_node,
+				 &priv->tx_ba_stream_tbl_ptr, list)
+		mwifiex_11n_delete_tx_ba_stream_tbl_entry(priv, del_tbl_ptr);
+	spin_unlock_irqrestore(&priv->tx_ba_stream_tbl_lock, flags);
+
+	INIT_LIST_HEAD(&priv->tx_ba_stream_tbl_ptr);
+
+	for (i = 0; i < MAX_NUM_TID; ++i)
+		priv->aggr_prio_tbl[i].ampdu_ap =
+			priv->aggr_prio_tbl[i].ampdu_user;
+}
+
+/*
+ * This function returns the pointer to an entry in BA Stream
+ * table which matches the given RA/TID pair.
+ */
+struct mwifiex_tx_ba_stream_tbl *
+mwifiex_11n_get_tx_ba_stream_tbl(struct mwifiex_private *priv,
+				 int tid, u8 *ra)
+{
+	struct mwifiex_tx_ba_stream_tbl *tx_ba_tsr_tbl;
+	unsigned long flags;
+
+	spin_lock_irqsave(&priv->tx_ba_stream_tbl_lock, flags);
+	list_for_each_entry(tx_ba_tsr_tbl, &priv->tx_ba_stream_tbl_ptr, list) {
+		if ((!memcmp(tx_ba_tsr_tbl->ra, ra, ETH_ALEN))
+		    && (tx_ba_tsr_tbl->tid == tid)) {
+			spin_unlock_irqrestore(&priv->tx_ba_stream_tbl_lock,
+					       flags);
+			return tx_ba_tsr_tbl;
+		}
+	}
+	spin_unlock_irqrestore(&priv->tx_ba_stream_tbl_lock, flags);
+	return NULL;
+}
+
+/*
+ * This function creates an entry in Tx BA stream table for the
+ * given RA/TID pair.
+ */
+void mwifiex_11n_create_tx_ba_stream_tbl(struct mwifiex_private *priv,
+					 u8 *ra, int tid,
+					 enum mwifiex_ba_status ba_status)
+{
+	struct mwifiex_tx_ba_stream_tbl *new_node;
+	unsigned long flags;
+
+	if (!mwifiex_11n_get_tx_ba_stream_tbl(priv, tid, ra)) {
+		new_node = kzalloc(sizeof(struct mwifiex_tx_ba_stream_tbl),
+				   GFP_ATOMIC);
+		if (!new_node) {
+			dev_err(priv->adapter->dev,
+				"%s: failed to alloc new_node\n", __func__);
+			return;
+		}
+
+		INIT_LIST_HEAD(&new_node->list);
+
+		new_node->tid = tid;
+		new_node->ba_status = ba_status;
+		memcpy(new_node->ra, ra, ETH_ALEN);
+
+		spin_lock_irqsave(&priv->tx_ba_stream_tbl_lock, flags);
+		list_add_tail(&new_node->list, &priv->tx_ba_stream_tbl_ptr);
+		spin_unlock_irqrestore(&priv->tx_ba_stream_tbl_lock, flags);
+	}
+
+	return;
+}
+
+/*
+ * This function sends an add BA request to the given TID/RA pair.
+ */
+int mwifiex_send_addba(struct mwifiex_private *priv, int tid, u8 *peer_mac)
+{
+	struct host_cmd_ds_11n_addba_req add_ba_req;
+	static u8 dialog_tok;
+	int ret;
+
+	dev_dbg(priv->adapter->dev, "cmd: %s: tid %d\n", __func__, tid);
+
+	add_ba_req.block_ack_param_set = cpu_to_le16(
+		(u16) ((tid << BLOCKACKPARAM_TID_POS) |
+			 (priv->add_ba_param.
+			  tx_win_size << BLOCKACKPARAM_WINSIZE_POS) |
+			 IMMEDIATE_BLOCK_ACK));
+	add_ba_req.block_ack_tmo = cpu_to_le16((u16)priv->add_ba_param.timeout);
+
+	++dialog_tok;
+
+	if (dialog_tok == 0)
+		dialog_tok = 1;
+
+	add_ba_req.dialog_token = dialog_tok;
+	memcpy(&add_ba_req.peer_mac_addr, peer_mac, ETH_ALEN);
+
+	/* We don't wait for the response of this command */
+	ret = mwifiex_prepare_cmd(priv, HostCmd_CMD_11N_ADDBA_REQ,
+				  0, 0, NULL, &add_ba_req);
+
+	return ret;
+}
+
+/*
+ * This function sends a delete BA request to the given TID/RA pair.
+ */
+int mwifiex_send_delba(struct mwifiex_private *priv, int tid, u8 *peer_mac,
+		       int initiator)
+{
+	struct host_cmd_ds_11n_delba delba;
+	int ret;
+	uint16_t del_ba_param_set;
+
+	memset(&delba, 0, sizeof(delba));
+	delba.del_ba_param_set = cpu_to_le16(tid << DELBA_TID_POS);
+
+	del_ba_param_set = le16_to_cpu(delba.del_ba_param_set);
+	if (initiator)
+		del_ba_param_set |= IEEE80211_DELBA_PARAM_INITIATOR_MASK;
+	else
+		del_ba_param_set &= ~IEEE80211_DELBA_PARAM_INITIATOR_MASK;
+
+	memcpy(&delba.peer_mac_addr, peer_mac, ETH_ALEN);
+
+	/* We don't wait for the response of this command */
+	ret = mwifiex_prepare_cmd(priv, HostCmd_CMD_11N_DELBA,
+				  HostCmd_ACT_GEN_SET, 0, NULL, &delba);
+
+	return ret;
+}
+
+/*
+ * This function handles the command response of a delete BA request.
+ */
+void mwifiex_11n_delete_ba_stream(struct mwifiex_private *priv, u8 *del_ba)
+{
+	struct host_cmd_ds_11n_delba *cmd_del_ba =
+		(struct host_cmd_ds_11n_delba *) del_ba;
+	uint16_t del_ba_param_set = le16_to_cpu(cmd_del_ba->del_ba_param_set);
+	int tid;
+
+	tid = del_ba_param_set >> DELBA_TID_POS;
+
+	mwifiex_11n_delete_ba_stream_tbl(priv, tid, cmd_del_ba->peer_mac_addr,
+					 TYPE_DELBA_RECEIVE,
+					 INITIATOR_BIT(del_ba_param_set));
+}
+
+/*
+ * This function retrieves the Rx reordering table.
+ */
+int mwifiex_get_rx_reorder_tbl(struct mwifiex_private *priv,
+			       struct mwifiex_ds_rx_reorder_tbl *buf)
+{
+	int i;
+	struct mwifiex_ds_rx_reorder_tbl *rx_reo_tbl = buf;
+	struct mwifiex_rx_reorder_tbl *rx_reorder_tbl_ptr;
+	int count = 0;
+	unsigned long flags;
+
+	spin_lock_irqsave(&priv->rx_reorder_tbl_lock, flags);
+	list_for_each_entry(rx_reorder_tbl_ptr, &priv->rx_reorder_tbl_ptr,
+			    list) {
+		rx_reo_tbl->tid = (u16) rx_reorder_tbl_ptr->tid;
+		memcpy(rx_reo_tbl->ta, rx_reorder_tbl_ptr->ta, ETH_ALEN);
+		rx_reo_tbl->start_win = rx_reorder_tbl_ptr->start_win;
+		rx_reo_tbl->win_size = rx_reorder_tbl_ptr->win_size;
+		for (i = 0; i < rx_reorder_tbl_ptr->win_size; ++i) {
+			if (rx_reorder_tbl_ptr->rx_reorder_ptr[i])
+				rx_reo_tbl->buffer[i] = true;
+			else
+				rx_reo_tbl->buffer[i] = false;
+		}
+		rx_reo_tbl++;
+		count++;
+
+		if (count >= MWIFIEX_MAX_RX_BASTREAM_SUPPORTED)
+			break;
+	}
+	spin_unlock_irqrestore(&priv->rx_reorder_tbl_lock, flags);
+
+	return count;
+}
+
+/*
+ * This function retrieves the Tx BA stream table.
+ */
+int mwifiex_get_tx_ba_stream_tbl(struct mwifiex_private *priv,
+				 struct mwifiex_ds_tx_ba_stream_tbl *buf)
+{
+	struct mwifiex_tx_ba_stream_tbl *tx_ba_tsr_tbl;
+	struct mwifiex_ds_tx_ba_stream_tbl *rx_reo_tbl = buf;
+	int count = 0;
+	unsigned long flags;
+
+	spin_lock_irqsave(&priv->tx_ba_stream_tbl_lock, flags);
+	list_for_each_entry(tx_ba_tsr_tbl, &priv->tx_ba_stream_tbl_ptr, list) {
+		rx_reo_tbl->tid = (u16) tx_ba_tsr_tbl->tid;
+		dev_dbg(priv->adapter->dev, "data: %s tid=%d\n",
+						__func__, rx_reo_tbl->tid);
+		memcpy(rx_reo_tbl->ra, tx_ba_tsr_tbl->ra, ETH_ALEN);
+		rx_reo_tbl++;
+		count++;
+		if (count >= MWIFIEX_MAX_TX_BASTREAM_SUPPORTED)
+			break;
+	}
+	spin_unlock_irqrestore(&priv->tx_ba_stream_tbl_lock, flags);
+
+	return count;
+}