mwifiex/mxm_wifiex/wlan_src/mlan/mlan_11n_rxreorder.c

/** @file mlan_11n_rxreorder.c
 *
 *  @brief This file contains the handling of RxReordering in wlan
 *  driver.
 *
 *
 *  Copyright 2008-2021 NXP
 *
 *  This software file (the File) is distributed by NXP
 *  under the terms of the GNU General Public License Version 2, June 1991
 *  (the License).  You may use, redistribute and/or modify the 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.
 *
 */

/********************************************************
Change log:
    11/10/2008: initial version
********************************************************/

#include "mlan.h"
#include "mlan_join.h"
#include "mlan_util.h"
#include "mlan_fw.h"
#include "mlan_main.h"
#include "mlan_wmm.h"
#include "mlan_11n.h"
#include "mlan_11n_rxreorder.h"

/********************************************************
			Local Variables
********************************************************/

/********************************************************
			Global Variables
********************************************************/

/********************************************************
			Local Functions
********************************************************/
/**
 *  @brief This function will dispatch amsdu packet and
 *         forward it to kernel/upper layer
 *
 *  @param priv     A pointer to mlan_private
 *  @param pmbuf    A pointer to the received buffer
 *
 *  @return         MLAN_STATUS_SUCCESS or MLAN_STATUS_FAILURE
 */
static mlan_status wlan_11n_dispatch_amsdu_pkt(mlan_private *priv,
					       pmlan_buffer pmbuf)
{
	RxPD *prx_pd;
	prx_pd = (RxPD *)(pmbuf->pbuf + pmbuf->data_offset);

	ENTER();
	if (prx_pd->rx_pkt_type == PKT_TYPE_AMSDU) {
		pmbuf->data_len = prx_pd->rx_pkt_length;
		pmbuf->data_offset += prx_pd->rx_pkt_offset;
		wlan_11n_deaggregate_pkt(priv, pmbuf);
		LEAVE();
		return MLAN_STATUS_SUCCESS;
	}
	LEAVE();
	return MLAN_STATUS_FAILURE;
}

/**
 *  @brief This function will process the rx packet and
 *         forward it to kernel/upper layer
 *
 *  @param priv     A pointer to mlan_private
 *  @param payload  A pointer to rx packet payload
 *  @param rx_reor_tbl_ptr       pointer to RxReorderTbl
 *
 *  @return         MLAN_STATUS_SUCCESS or MLAN_STATUS_FAILURE
 */
static mlan_status wlan_11n_dispatch_pkt(t_void *priv, t_void *payload,
					 RxReorderTbl *rx_reor_tbl_ptr)
{
	mlan_status ret = MLAN_STATUS_SUCCESS;
#ifdef STA_SUPPORT
	pmlan_adapter pmadapter = ((pmlan_private)priv)->adapter;
#endif
	ENTER();
	if (payload == (t_void *)RX_PKT_DROPPED_IN_FW) {
		LEAVE();
		return ret;
	}

#ifdef UAP_SUPPORT
	if (GET_BSS_ROLE((mlan_private *)priv) == MLAN_BSS_ROLE_UAP) {
		if (MLAN_STATUS_SUCCESS ==
		    wlan_11n_dispatch_amsdu_pkt((mlan_private *)priv,
						(pmlan_buffer)payload)) {
			LEAVE();
			return ret;
		}
		ret = wlan_process_uap_rx_packet(priv, (pmlan_buffer)payload);
		LEAVE();
		return ret;
	}
#endif /* UAP_SUPPORT */

#ifdef STA_SUPPORT
	if (MLAN_STATUS_SUCCESS ==
	    wlan_11n_dispatch_amsdu_pkt((mlan_private *)priv,
					(pmlan_buffer)payload)) {
		LEAVE();
		return ret;
	}
	ret = wlan_process_rx_packet(pmadapter, (pmlan_buffer)payload);
#endif /* STA_SUPPORT */
	LEAVE();
	return ret;
}

/**
 *  @brief This function restarts the reordering timeout timer
 *
 *  @param pmadapter        A pointer to mlan_adapter
 *  @param rx_reor_tbl_ptr  A pointer to structure RxReorderTbl
 *
 *  @return                 N/A
 */
static void mlan_11n_rxreorder_timer_restart(pmlan_adapter pmadapter,
					     RxReorderTbl *rx_reor_tbl_ptr)
{
	t_u16 min_flush_time = 0;
	ENTER();

	if (rx_reor_tbl_ptr->win_size >= 32)
		min_flush_time = MIN_FLUSH_TIMER_15_MS;
	else
		min_flush_time = MIN_FLUSH_TIMER_MS;

	if (rx_reor_tbl_ptr->timer_context.timer_is_set)
		pmadapter->callbacks.moal_stop_timer(
			pmadapter->pmoal_handle,
			rx_reor_tbl_ptr->timer_context.timer);

	pmadapter->callbacks.moal_start_timer(
		pmadapter->pmoal_handle, rx_reor_tbl_ptr->timer_context.timer,
		MFALSE, (rx_reor_tbl_ptr->win_size * min_flush_time));

	rx_reor_tbl_ptr->timer_context.timer_is_set = MTRUE;
	LEAVE();
}

/**
 *  @brief This function dispatches all the packets in the buffer.
 *         There could be holes in the buffer.
 *
 *  @param priv             A pointer to mlan_private
 *  @param rx_reor_tbl_ptr  A pointer to structure RxReorderTbl
 *  @param start_win        Start window
 *
 *  @return                 MLAN_STATUS_SUCCESS
 */
static mlan_status wlan_11n_dispatch_pkt_until_start_win(
	t_void *priv, RxReorderTbl *rx_reor_tbl_ptr, int start_win)
{
	int no_pkt_to_send, i, xchg;
	mlan_status ret = MLAN_STATUS_SUCCESS;
	void *rx_tmp_ptr = MNULL;
	mlan_private *pmpriv = (mlan_private *)priv;

	ENTER();

	no_pkt_to_send = (start_win > rx_reor_tbl_ptr->start_win) ?
				 MIN((start_win - rx_reor_tbl_ptr->start_win),
				     rx_reor_tbl_ptr->win_size) :
				 rx_reor_tbl_ptr->win_size;

	for (i = 0; i < no_pkt_to_send; ++i) {
		pmpriv->adapter->callbacks.moal_spin_lock(
			pmpriv->adapter->pmoal_handle, pmpriv->rx_pkt_lock);
		rx_tmp_ptr = MNULL;
		if (rx_reor_tbl_ptr->rx_reorder_ptr[i]) {
			rx_tmp_ptr = rx_reor_tbl_ptr->rx_reorder_ptr[i];
			rx_reor_tbl_ptr->rx_reorder_ptr[i] = MNULL;
		}
		pmpriv->adapter->callbacks.moal_spin_unlock(
			pmpriv->adapter->pmoal_handle, pmpriv->rx_pkt_lock);
		if (rx_tmp_ptr)
			wlan_11n_dispatch_pkt(priv, rx_tmp_ptr,
					      rx_reor_tbl_ptr);
	}

	pmpriv->adapter->callbacks.moal_spin_lock(pmpriv->adapter->pmoal_handle,
						  pmpriv->rx_pkt_lock);
	/*
	 * We don't have a circular buffer, hence use rotation to simulate
	 * circular buffer
	 */
	xchg = rx_reor_tbl_ptr->win_size - no_pkt_to_send;
	for (i = 0; i < xchg; ++i) {
		rx_reor_tbl_ptr->rx_reorder_ptr[i] =
			rx_reor_tbl_ptr->rx_reorder_ptr[no_pkt_to_send + i];
		rx_reor_tbl_ptr->rx_reorder_ptr[no_pkt_to_send + i] = MNULL;
	}

	rx_reor_tbl_ptr->start_win = start_win;
	pmpriv->adapter->callbacks.moal_spin_unlock(
		pmpriv->adapter->pmoal_handle, pmpriv->rx_pkt_lock);

	LEAVE();
	return ret;
}

/**
 *  @brief This function will display the rxReorder table
 *
 *  @param pmadapter          A pointer to mlan_adapter structure
 *  @param rx_reor_tbl_ptr    A pointer to structure RxReorderTbl
 *
 *  @return                   N/A
 */
static t_void wlan_11n_display_tbl_ptr(pmlan_adapter pmadapter,
				       RxReorderTbl *rx_reor_tbl_ptr)
{
	ENTER();

	DBG_HEXDUMP(MDAT_D, "Reorder ptr", rx_reor_tbl_ptr->rx_reorder_ptr,
		    sizeof(t_void *) * rx_reor_tbl_ptr->win_size);

	LEAVE();
}

/**
 *  @brief This function will dispatch all packets sequentially
 *          from start_win until a hole is found and adjust the
 *          start_win appropriately
 *
 *  @param priv             A pointer to mlan_private
 *  @param rx_reor_tbl_ptr  A pointer to structure RxReorderTbl
 *
 *  @return                 MLAN_STATUS_SUCCESS
 */
static mlan_status wlan_11n_scan_and_dispatch(t_void *priv,
					      RxReorderTbl *rx_reor_tbl_ptr)
{
	int i, j, xchg;
	mlan_status ret = MLAN_STATUS_SUCCESS;
	void *rx_tmp_ptr = MNULL;
	mlan_private *pmpriv = (mlan_private *)priv;

	ENTER();

	for (i = 0; i < rx_reor_tbl_ptr->win_size; ++i) {
		pmpriv->adapter->callbacks.moal_spin_lock(
			pmpriv->adapter->pmoal_handle, pmpriv->rx_pkt_lock);
		if (!rx_reor_tbl_ptr->rx_reorder_ptr[i]) {
			pmpriv->adapter->callbacks.moal_spin_unlock(
				pmpriv->adapter->pmoal_handle,
				pmpriv->rx_pkt_lock);
			break;
		}
		rx_tmp_ptr = rx_reor_tbl_ptr->rx_reorder_ptr[i];
		rx_reor_tbl_ptr->rx_reorder_ptr[i] = MNULL;
		pmpriv->adapter->callbacks.moal_spin_unlock(
			pmpriv->adapter->pmoal_handle, pmpriv->rx_pkt_lock);
		wlan_11n_dispatch_pkt(priv, rx_tmp_ptr, rx_reor_tbl_ptr);
	}

	pmpriv->adapter->callbacks.moal_spin_lock(pmpriv->adapter->pmoal_handle,
						  pmpriv->rx_pkt_lock);
	/*
	 * We don't have a circular buffer, hence use rotation to simulate
	 * circular buffer
	 */
	if (i > 0) {
		xchg = rx_reor_tbl_ptr->win_size - i;
		for (j = 0; j < xchg; ++j) {
			rx_reor_tbl_ptr->rx_reorder_ptr[j] =
				rx_reor_tbl_ptr->rx_reorder_ptr[i + j];
			rx_reor_tbl_ptr->rx_reorder_ptr[i + j] = MNULL;
		}
	}

	rx_reor_tbl_ptr->start_win =
		(rx_reor_tbl_ptr->start_win + i) & (MAX_TID_VALUE - 1);

	pmpriv->adapter->callbacks.moal_spin_unlock(
		pmpriv->adapter->pmoal_handle, pmpriv->rx_pkt_lock);
	LEAVE();
	return ret;
}

/**
 *  @brief This function delete rxreorder table's entry
 *          and free the memory
 *
 *  @param priv             A pointer to mlan_private
 *  @param rx_reor_tbl_ptr  A pointer to structure RxReorderTbl
 *
 *  @return                 N/A
 */
static t_void wlan_11n_delete_rxreorder_tbl_entry(mlan_private *priv,
						  RxReorderTbl *rx_reor_tbl_ptr)
{
	pmlan_adapter pmadapter = priv->adapter;

	ENTER();

	if (!rx_reor_tbl_ptr) {
		LEAVE();
		return;
	}
	mlan_block_rx_process(pmadapter, MTRUE);

	wlan_11n_dispatch_pkt_until_start_win(
		priv, rx_reor_tbl_ptr,
		(rx_reor_tbl_ptr->start_win + rx_reor_tbl_ptr->win_size) &
			(MAX_TID_VALUE - 1));

	if (rx_reor_tbl_ptr->timer_context.timer) {
		if (rx_reor_tbl_ptr->timer_context.timer_is_set) {
			priv->adapter->callbacks.moal_stop_timer(
				pmadapter->pmoal_handle,
				rx_reor_tbl_ptr->timer_context.timer);
			rx_reor_tbl_ptr->timer_context.timer_is_set = MFALSE;
		}
		priv->adapter->callbacks.moal_free_timer(
			pmadapter->pmoal_handle,
			rx_reor_tbl_ptr->timer_context.timer);
		rx_reor_tbl_ptr->timer_context.timer = MNULL;
	}

	PRINTM(MDAT_D, "Delete rx_reor_tbl_ptr: %p\n", rx_reor_tbl_ptr);
	util_unlink_list(pmadapter->pmoal_handle, &priv->rx_reorder_tbl_ptr,
			 (pmlan_linked_list)rx_reor_tbl_ptr,
			 pmadapter->callbacks.moal_spin_lock,
			 pmadapter->callbacks.moal_spin_unlock);

	pmadapter->callbacks.moal_mfree(
		pmadapter->pmoal_handle,
		(t_u8 *)rx_reor_tbl_ptr->rx_reorder_ptr);
	pmadapter->callbacks.moal_mfree(pmadapter->pmoal_handle,
					(t_u8 *)rx_reor_tbl_ptr);
	mlan_block_rx_process(pmadapter, MFALSE);

	LEAVE();
}

/**
 *  @brief This function returns the last used sequence number
 *
 *  @param rx_reorder_tbl_ptr   A pointer to structure RxReorderTbl
 *
 *  @return                     Last used sequence number
 */
static int wlan_11n_find_last_seqnum(RxReorderTbl *rx_reorder_tbl_ptr)
{
	int i;

	ENTER();
	for (i = (rx_reorder_tbl_ptr->win_size - 1); i >= 0; --i) {
		if (rx_reorder_tbl_ptr->rx_reorder_ptr[i]) {
			LEAVE();
			return i;
		}
	}
	LEAVE();
	return -1;
}

/**
 *  @brief This function flushes all data
 *
 *  @param priv          A pointer to  mlan_private structure
 *  @param rx_reor_tbl_ptr  A pointer to RxReorderTbl
 *
 *  @return             N/A
 */
static t_void wlan_start_flush_data(mlan_private *priv,
				    RxReorderTbl *rx_reor_tbl_ptr)
{
	int startWin;

	ENTER();
	wlan_11n_display_tbl_ptr(priv->adapter, rx_reor_tbl_ptr);

	startWin = wlan_11n_find_last_seqnum(rx_reor_tbl_ptr);
	if (startWin >= 0) {
		PRINTM(MINFO, "Flush data %d\n", startWin);
		wlan_11n_dispatch_pkt_until_start_win(
			priv, rx_reor_tbl_ptr,
			((rx_reor_tbl_ptr->start_win + startWin + 1) &
			 (MAX_TID_VALUE - 1)));
	}
	wlan_11n_display_tbl_ptr(priv->adapter, rx_reor_tbl_ptr);
	LEAVE();
}

/**
 *  @brief This function set the flag to flushes data
 *
 *  @param context      Reorder context pointer
 *
 *  @return             N/A
 */
static t_void wlan_flush_data(t_void *context)
{
	reorder_tmr_cnxt_t *reorder_cnxt = (reorder_tmr_cnxt_t *)context;
	ENTER();
	/* Set the flag to flush data */
	reorder_cnxt->priv->adapter->flush_data = MTRUE;
	reorder_cnxt->ptr->flush_data = MTRUE;
	reorder_cnxt->timer_is_set = MFALSE;
	wlan_recv_event(reorder_cnxt->priv, MLAN_EVENT_ID_DRV_DEFER_RX_WORK,
			MNULL);
	LEAVE();
}

/**
 *  @brief This function will create a entry in rx reordering table for the
 *          given ta/tid and will initialize it with seq_num, win_size
 *
 *  @param priv     A pointer to mlan_private
 *  @param ta       ta to find in reordering table
 *  @param tid      tid to find in reordering table
 *  @param win_size win_size for the give ta/tid pair.
 *  @param seq_num  Starting sequence number for current entry.
 *
 *  @return         N/A
 */
static t_void wlan_11n_create_rxreorder_tbl(mlan_private *priv, t_u8 *ta,
					    int tid, int win_size, int seq_num)
{
	int i;
	pmlan_adapter pmadapter = priv->adapter;
	RxReorderTbl *rx_reor_tbl_ptr, *new_node;
	sta_node *sta_ptr = MNULL;
	t_u16 last_seq = 0;

	ENTER();

	/*
	 * If we get a TID, ta pair which is already present dispatch all the
	 * the packets and move the window size until the ssn
	 */
	rx_reor_tbl_ptr = wlan_11n_get_rxreorder_tbl(priv, tid, ta);
	if (rx_reor_tbl_ptr) {
		PRINTM(MCMND, "%s: delete %p old_size=%d, win_size=%d\n",
		       __func__, rx_reor_tbl_ptr, rx_reor_tbl_ptr->win_size,
		       win_size);
		wlan_11n_delete_rxreorder_tbl_entry(priv, rx_reor_tbl_ptr);
	}
	mlan_block_rx_process(pmadapter, MTRUE);
	PRINTM(MCMND, "%s: seq_num %d, tid %d, ta " MACSTR ", win_size %d\n",
	       __func__, seq_num, tid, MAC2STR(ta), win_size);
	if (pmadapter->callbacks.moal_malloc(pmadapter->pmoal_handle,
					     sizeof(RxReorderTbl), MLAN_MEM_DEF,
					     (t_u8 **)&new_node)) {
		PRINTM(MERROR, "Rx reorder memory allocation failed\n");
		mlan_block_rx_process(pmadapter, MFALSE);
		LEAVE();
		return;
	}

	util_init_list((pmlan_linked_list)new_node);
	if (pmadapter->callbacks.moal_malloc(
		    pmadapter->pmoal_handle, sizeof(pmlan_buffer) * win_size,
		    MLAN_MEM_DEF, (t_u8 **)&new_node->rx_reorder_ptr)) {
		PRINTM(MERROR, "Rx reorder table memory allocation"
			       "failed\n");
		pmadapter->callbacks.moal_mfree(pmadapter->pmoal_handle,
						(t_u8 *)new_node);
		mlan_block_rx_process(pmadapter, MFALSE);
		LEAVE();
		return;
	}
	PRINTM(MDAT_D, "Create ReorderPtr: %p start_win=%d last_seq=%d\n",
	       new_node, new_node->start_win, last_seq);
	new_node->timer_context.ptr = new_node;
	new_node->timer_context.priv = priv;
	new_node->timer_context.timer_is_set = MFALSE;
	pmadapter->callbacks.moal_init_timer(pmadapter->pmoal_handle,
					     &new_node->timer_context.timer,
					     wlan_flush_data,
					     &new_node->timer_context);
	util_enqueue_list_tail(pmadapter->pmoal_handle,
			       &priv->rx_reorder_tbl_ptr,
			       (pmlan_linked_list)new_node,
			       pmadapter->callbacks.moal_spin_lock,
			       pmadapter->callbacks.moal_spin_unlock);
	new_node->tid = tid;
	memcpy_ext(pmadapter, new_node->ta, ta, MLAN_MAC_ADDR_LENGTH,
		   MLAN_MAC_ADDR_LENGTH);
	new_node->start_win = seq_num;
	new_node->pkt_count = 0;
	if (queuing_ra_based(priv)) {
		if (GET_BSS_ROLE(priv) == MLAN_BSS_ROLE_UAP) {
			sta_ptr = wlan_get_station_entry(priv, ta);
			if (sta_ptr)
				last_seq = sta_ptr->rx_seq[tid];
		}
		PRINTM(MINFO, "UAP/ADHOC:last_seq=%d start_win=%d\n", last_seq,
		       new_node->start_win);
	} else {
		sta_ptr = wlan_get_station_entry(priv, ta);
		if (sta_ptr)
			last_seq = sta_ptr->rx_seq[tid];
		else
			last_seq = priv->rx_seq[tid];
	}
	new_node->last_seq = last_seq;
	new_node->win_size = win_size;
	new_node->force_no_drop = MFALSE;
	new_node->check_start_win = MTRUE;
	new_node->ba_status = BA_STREAM_SETUP_INPROGRESS;
	for (i = 0; i < win_size; ++i)
		new_node->rx_reorder_ptr[i] = MNULL;

	mlan_block_rx_process(pmadapter, MFALSE);
	LEAVE();
}

/********************************************************
			Global Functions
********************************************************/

/**
 *  @brief This function will return the pointer to a entry in rx reordering
 *          table which matches the give TA/TID pair
 *
 *  @param priv    A pointer to mlan_private
 *  @param ta      ta to find in reordering table
 *  @param tid     tid to find in reordering table
 *
 *  @return        A pointer to structure RxReorderTbl
 */
RxReorderTbl *wlan_11n_get_rxreorder_tbl(mlan_private *priv, int tid, t_u8 *ta)
{
	RxReorderTbl *rx_reor_tbl_ptr;

	ENTER();

	rx_reor_tbl_ptr =
		(RxReorderTbl *)util_peek_list(priv->adapter->pmoal_handle,
					       &priv->rx_reorder_tbl_ptr, MNULL,
					       MNULL);
	if (!rx_reor_tbl_ptr) {
		LEAVE();
		return MNULL;
	}

	while (rx_reor_tbl_ptr != (RxReorderTbl *)&priv->rx_reorder_tbl_ptr) {
		if ((!memcmp(priv->adapter, rx_reor_tbl_ptr->ta, ta,
			     MLAN_MAC_ADDR_LENGTH)) &&
		    (rx_reor_tbl_ptr->tid == tid)) {
			LEAVE();
			return rx_reor_tbl_ptr;
		}

		rx_reor_tbl_ptr = rx_reor_tbl_ptr->pnext;
	}

	LEAVE();
	return MNULL;
}

/**
 *  @brief This function prepares command for adding a block ack
 *          request.
 *
 *  @param priv        A pointer to mlan_private structure
 *  @param cmd         A pointer to HostCmd_DS_COMMAND structure
 *  @param pdata_buf   A pointer to data buffer
 *
 *  @return            MLAN_STATUS_SUCCESS
 */
mlan_status wlan_cmd_11n_addba_req(mlan_private *priv, HostCmd_DS_COMMAND *cmd,
				   t_void *pdata_buf)
{
	HostCmd_DS_11N_ADDBA_REQ *padd_ba_req =
		(HostCmd_DS_11N_ADDBA_REQ *)&cmd->params.add_ba_req;
	ENTER();

	cmd->command = wlan_cpu_to_le16(HostCmd_CMD_11N_ADDBA_REQ);
	cmd->size =
		wlan_cpu_to_le16(sizeof(HostCmd_DS_11N_ADDBA_REQ) + S_DS_GEN);

	memcpy_ext(priv->adapter, padd_ba_req, pdata_buf,
		   sizeof(HostCmd_DS_11N_ADDBA_REQ),
		   sizeof(HostCmd_DS_11N_ADDBA_REQ));
	padd_ba_req->block_ack_param_set =
		wlan_cpu_to_le16(padd_ba_req->block_ack_param_set);
	padd_ba_req->block_ack_tmo =
		wlan_cpu_to_le16(padd_ba_req->block_ack_tmo);
	padd_ba_req->ssn = wlan_cpu_to_le16(padd_ba_req->ssn);
	padd_ba_req->add_req_result = 0;

	LEAVE();
	return MLAN_STATUS_SUCCESS;
}

/**
 *  @brief This function check if AMPDU Rx allowed
 *
 *  @param priv        A pointer to mlan_private structure
 *  @param tid         TID
 *
 *  @return            MTRUE/MFALSE
 */
static t_u8 wlan_is_addba_reject(mlan_private *priv, t_u8 tid)
{
	if (tid >= MAX_NUM_TID) {
		PRINTM(MERROR, "Wrong TID =%d", tid);
		return ADDBA_RSP_STATUS_REJECT;
	}
#ifdef STA_SUPPORT
#endif
	return priv->addba_reject[tid];
}
/**
 *  @brief This function prepares command for adding a block ack
 *          response.
 *
 *  @param priv        A pointer to mlan_private structure
 *  @param cmd         A pointer to HostCmd_DS_COMMAND structure
 *  @param pdata_buf   A pointer to data buffer
 *
 *  @return            MLAN_STATUS_SUCCESS
 */
mlan_status wlan_cmd_11n_addba_rspgen(mlan_private *priv,
				      HostCmd_DS_COMMAND *cmd, void *pdata_buf)
{
	HostCmd_DS_11N_ADDBA_RSP *padd_ba_rsp =
		(HostCmd_DS_11N_ADDBA_RSP *)&cmd->params.add_ba_rsp;
	HostCmd_DS_11N_ADDBA_REQ *pevt_addba_req =
		(HostCmd_DS_11N_ADDBA_REQ *)pdata_buf;
	t_u8 tid = 0;
	int win_size = 0;

	ENTER();

	pevt_addba_req->block_ack_param_set =
		wlan_le16_to_cpu(pevt_addba_req->block_ack_param_set);
	pevt_addba_req->block_ack_tmo =
		wlan_le16_to_cpu(pevt_addba_req->block_ack_tmo);
	pevt_addba_req->ssn = wlan_le16_to_cpu(pevt_addba_req->ssn);

	cmd->command = wlan_cpu_to_le16(HostCmd_CMD_11N_ADDBA_RSP);
	cmd->size =
		wlan_cpu_to_le16(sizeof(HostCmd_DS_11N_ADDBA_RSP) + S_DS_GEN);

	memcpy_ext(priv->adapter, padd_ba_rsp->peer_mac_addr,
		   pevt_addba_req->peer_mac_addr, MLAN_MAC_ADDR_LENGTH,
		   MLAN_MAC_ADDR_LENGTH);
	padd_ba_rsp->dialog_token = pevt_addba_req->dialog_token;
	padd_ba_rsp->block_ack_tmo =
		wlan_cpu_to_le16(pevt_addba_req->block_ack_tmo);
	padd_ba_rsp->ssn = wlan_cpu_to_le16(pevt_addba_req->ssn);
	padd_ba_rsp->add_rsp_result = 0;

	padd_ba_rsp->block_ack_param_set = pevt_addba_req->block_ack_param_set;
	tid = (padd_ba_rsp->block_ack_param_set & BLOCKACKPARAM_TID_MASK) >>
	      BLOCKACKPARAM_TID_POS;
	if (wlan_is_addba_reject(priv, tid)
#ifdef STA_SUPPORT
	    || ((GET_BSS_ROLE(priv) == MLAN_BSS_ROLE_STA) &&
		priv->wps.session_enable)
#endif
#ifdef UAP_SUPPORT
	    || ((GET_BSS_ROLE(priv) == MLAN_BSS_ROLE_UAP) &&
		(util_scalar_read(priv->adapter->pmoal_handle,
				  &priv->adapter->pending_bridge_pkts,
				  priv->adapter->callbacks.moal_spin_lock,
				  priv->adapter->callbacks.moal_spin_unlock) >
		 RX_LOW_THRESHOLD))
#endif
	)
		padd_ba_rsp->status_code =
			wlan_cpu_to_le16(ADDBA_RSP_STATUS_DECLINED);
	else
		padd_ba_rsp->status_code =
			wlan_cpu_to_le16(ADDBA_RSP_STATUS_ACCEPT);
	padd_ba_rsp->block_ack_param_set &= ~BLOCKACKPARAM_WINSIZE_MASK;
	if (!priv->add_ba_param.rx_amsdu)
		/* We do not support AMSDU inside AMPDU, hence reset the bit */
		padd_ba_rsp->block_ack_param_set &=
			~BLOCKACKPARAM_AMSDU_SUPP_MASK;

	padd_ba_rsp->block_ack_param_set |=
		(priv->add_ba_param.rx_win_size << BLOCKACKPARAM_WINSIZE_POS);
	win_size = (padd_ba_rsp->block_ack_param_set &
		    BLOCKACKPARAM_WINSIZE_MASK) >>
		   BLOCKACKPARAM_WINSIZE_POS;

	if (win_size == 0)
		padd_ba_rsp->status_code =
			wlan_cpu_to_le16(ADDBA_RSP_STATUS_DECLINED);

	padd_ba_rsp->block_ack_param_set =
		wlan_cpu_to_le16(padd_ba_rsp->block_ack_param_set);

	if (padd_ba_rsp->status_code ==
	    wlan_cpu_to_le16(ADDBA_RSP_STATUS_ACCEPT))
		wlan_11n_create_rxreorder_tbl(priv,
					      pevt_addba_req->peer_mac_addr,
					      tid, win_size,
					      pevt_addba_req->ssn);
	LEAVE();
	return MLAN_STATUS_SUCCESS;
}

/**
 *  @brief This function prepares command for deleting a block ack
 *          request.
 *
 *  @param priv       A pointer to mlan_private structure
 *  @param cmd        A pointer to HostCmd_DS_COMMAND structure
 *  @param pdata_buf  A pointer to data buffer
 *
 *  @return           MLAN_STATUS_SUCCESS
 */
mlan_status wlan_cmd_11n_delba(mlan_private *priv, HostCmd_DS_COMMAND *cmd,
			       void *pdata_buf)
{
	HostCmd_DS_11N_DELBA *pdel_ba =
		(HostCmd_DS_11N_DELBA *)&cmd->params.del_ba;

	ENTER();

	cmd->command = wlan_cpu_to_le16(HostCmd_CMD_11N_DELBA);
	cmd->size = wlan_cpu_to_le16(sizeof(HostCmd_DS_11N_DELBA) + S_DS_GEN);

	memcpy_ext(priv->adapter, pdel_ba, pdata_buf,
		   sizeof(HostCmd_DS_11N_DELBA), sizeof(HostCmd_DS_11N_DELBA));
	pdel_ba->del_ba_param_set = wlan_cpu_to_le16(pdel_ba->del_ba_param_set);
	pdel_ba->reason_code = wlan_cpu_to_le16(pdel_ba->reason_code);
	pdel_ba->del_result = 0;

	LEAVE();
	return MLAN_STATUS_SUCCESS;
}

/**
 *  @brief This function will identify if RxReodering is needed for the packet
 *          and will do the reordering if required before sending it to kernel
 *
 *  @param priv     A pointer to mlan_private
 *  @param seq_num  Seqence number of the current packet
 *  @param tid      Tid of the current packet
 *  @param ta       Transmiter address of the current packet
 *  @param pkt_type Packetype for the current packet (to identify if its a BAR)
 *  @param payload  Pointer to the payload
 *
 *  @return         MLAN_STATUS_SUCCESS or MLAN_STATUS_FAILURE
 */
mlan_status mlan_11n_rxreorder_pkt(void *priv, t_u16 seq_num, t_u16 tid,
				   t_u8 *ta, t_u8 pkt_type, void *payload)
{
	RxReorderTbl *rx_reor_tbl_ptr;
	int prev_start_win, start_win, end_win, win_size;
	mlan_status ret = MLAN_STATUS_SUCCESS;
	pmlan_adapter pmadapter = ((mlan_private *)priv)->adapter;

	ENTER();

	rx_reor_tbl_ptr =
		wlan_11n_get_rxreorder_tbl((mlan_private *)priv, tid, ta);
	if (!rx_reor_tbl_ptr || rx_reor_tbl_ptr->win_size <= 1) {
		if (pkt_type != PKT_TYPE_BAR)
			wlan_11n_dispatch_pkt(priv, payload, rx_reor_tbl_ptr);

		LEAVE();
		return ret;

	} else {
		if (rx_reor_tbl_ptr->flush_data) {
			rx_reor_tbl_ptr->flush_data = MFALSE;
			wlan_start_flush_data(priv, rx_reor_tbl_ptr);
		}
		if ((pkt_type == PKT_TYPE_AMSDU) && !rx_reor_tbl_ptr->amsdu) {
			wlan_11n_dispatch_pkt(priv, payload, rx_reor_tbl_ptr);
			LEAVE();
			return ret;
		}
		if (pkt_type == PKT_TYPE_BAR)
			PRINTM(MDAT_D, "BAR ");
		if (pkt_type == PKT_TYPE_AMSDU)
			PRINTM(MDAT_D, "AMSDU ");

		if (rx_reor_tbl_ptr->check_start_win) {
			if (seq_num == rx_reor_tbl_ptr->start_win)
				rx_reor_tbl_ptr->check_start_win = MFALSE;
			else {
				rx_reor_tbl_ptr->pkt_count++;
				if (rx_reor_tbl_ptr->pkt_count <
				    (rx_reor_tbl_ptr->win_size / 2)) {
					if (rx_reor_tbl_ptr->last_seq ==
					    seq_num) {
						/** drop duplicate packet */
						ret = MLAN_STATUS_FAILURE;
					} else {
						/** forward the packet to kernel
						 */
						rx_reor_tbl_ptr->last_seq =
							seq_num;
						if (pkt_type != PKT_TYPE_BAR)
							wlan_11n_dispatch_pkt(
								priv, payload,
								rx_reor_tbl_ptr);
					}
					LEAVE();
					return ret;
				}
				rx_reor_tbl_ptr->check_start_win = MFALSE;
				if ((seq_num != rx_reor_tbl_ptr->start_win) &&
				    (rx_reor_tbl_ptr->last_seq !=
				     DEFAULT_SEQ_NUM)) {
					end_win = (rx_reor_tbl_ptr->start_win +
						   rx_reor_tbl_ptr->win_size -
						   1) &
						  (MAX_TID_VALUE - 1);
					if (((end_win >
					      rx_reor_tbl_ptr->start_win) &&
					     (rx_reor_tbl_ptr->last_seq >=
					      rx_reor_tbl_ptr->start_win) &&
					     (rx_reor_tbl_ptr->last_seq <
					      end_win)) ||
					    ((end_win <
					      rx_reor_tbl_ptr->start_win) &&
					     ((rx_reor_tbl_ptr->last_seq >=
					       rx_reor_tbl_ptr->start_win) ||
					      (rx_reor_tbl_ptr->last_seq <
					       end_win)))) {
						PRINTM(MDAT_D,
						       "Update start_win: last_seq=%d, start_win=%d seq_num=%d\n",
						       rx_reor_tbl_ptr->last_seq,
						       rx_reor_tbl_ptr
							       ->start_win,
						       seq_num);
						rx_reor_tbl_ptr->start_win =
							rx_reor_tbl_ptr
								->last_seq +
							1;
					} else if ((seq_num <
						    rx_reor_tbl_ptr->start_win) &&
						   (seq_num >
						    rx_reor_tbl_ptr->last_seq)) {
						PRINTM(MDAT_D,
						       "Update start_win: last_seq=%d, start_win=%d seq_num=%d\n",
						       rx_reor_tbl_ptr->last_seq,
						       rx_reor_tbl_ptr
							       ->start_win,
						       seq_num);
						rx_reor_tbl_ptr->start_win =
							rx_reor_tbl_ptr
								->last_seq +
							1;
					}
				}
			}
		}
		if (rx_reor_tbl_ptr->force_no_drop) {
			wlan_11n_dispatch_pkt_until_start_win(
				priv, rx_reor_tbl_ptr,
				(rx_reor_tbl_ptr->start_win +
				 rx_reor_tbl_ptr->win_size) &
					(MAX_TID_VALUE - 1));
			if (pkt_type != PKT_TYPE_BAR)
				rx_reor_tbl_ptr->start_win = seq_num;
			mlan_11n_rxreorder_timer_restart(pmadapter,
							 rx_reor_tbl_ptr);
		}

		prev_start_win = start_win = rx_reor_tbl_ptr->start_win;
		win_size = rx_reor_tbl_ptr->win_size;
		end_win = ((start_win + win_size) - 1) & (MAX_TID_VALUE - 1);

		PRINTM(MDAT_D, "TID %d, TA " MACSTR "\n", tid, MAC2STR(ta));
		PRINTM(MDAT_D,
		       "1:seq_num %d start_win %d win_size %d end_win %d\n",
		       seq_num, start_win, win_size, end_win);
		/*
		 * If seq_num is less then starting win then ignore and drop
		 * the packet
		 */
		if (rx_reor_tbl_ptr->force_no_drop) {
			PRINTM(MDAT_D, "No drop packet\n");
			rx_reor_tbl_ptr->force_no_drop = MFALSE;
		} else {
			/* Wrap */
			if ((start_win + TWOPOW11) > (MAX_TID_VALUE - 1)) {
				if (seq_num >= ((start_win + (TWOPOW11)) &
						(MAX_TID_VALUE - 1)) &&
				    (seq_num < start_win)) {
					if (pkt_type == PKT_TYPE_BAR)
						PRINTM(MDAT_D,
						       "BAR: start_win=%d, end_win=%d, seq_num=%d\n",
						       start_win, end_win,
						       seq_num);
					ret = MLAN_STATUS_FAILURE;
					goto done;
				}
			} else if ((seq_num < start_win) ||
				   (seq_num >= (start_win + (TWOPOW11)))) {
				if (pkt_type == PKT_TYPE_BAR)
					PRINTM(MDAT_D,
					       "BAR: start_win=%d, end_win=%d, seq_num=%d\n",
					       start_win, end_win, seq_num);
				ret = MLAN_STATUS_FAILURE;
				goto done;
			}
		}

		/*
		 * If this packet is a BAR we adjust seq_num as
		 * WinStart = seq_num
		 */
		if (pkt_type == PKT_TYPE_BAR)
			seq_num = ((seq_num + win_size) - 1) &
				  (MAX_TID_VALUE - 1);

		PRINTM(MDAT_D,
		       "2:seq_num %d start_win %d win_size %d end_win %d\n",
		       seq_num, start_win, win_size, end_win);

		if (((end_win < start_win) && (seq_num < start_win) &&
		     (seq_num > end_win)) ||
		    ((end_win > start_win) &&
		     ((seq_num > end_win) || (seq_num < start_win)))) {
			end_win = seq_num;
			if (((seq_num - win_size) + 1) >= 0)
				start_win = (end_win - win_size) + 1;
			else
				start_win =
					(MAX_TID_VALUE - (win_size - seq_num)) +
					1;
			ret = wlan_11n_dispatch_pkt_until_start_win(
				priv, rx_reor_tbl_ptr, start_win);
			if (ret)
				goto done;
		}

		PRINTM(MDAT_D,
		       "3:seq_num %d start_win %d win_size %d"
		       " end_win %d\n",
		       seq_num, start_win, win_size, end_win);
		if (pkt_type != PKT_TYPE_BAR) {
			if (seq_num >= start_win) {
				if (rx_reor_tbl_ptr->rx_reorder_ptr[seq_num -
								    start_win]) {
					PRINTM(MDAT_D, "Drop Duplicate Pkt\n");
					ret = MLAN_STATUS_FAILURE;
					goto done;
				}
				rx_reor_tbl_ptr
					->rx_reorder_ptr[seq_num - start_win] =
					payload;
			} else { /* Wrap condition */
				if (rx_reor_tbl_ptr
					    ->rx_reorder_ptr[(seq_num +
							      (MAX_TID_VALUE)) -
							     start_win]) {
					PRINTM(MDAT_D, "Drop Duplicate Pkt\n");
					ret = MLAN_STATUS_FAILURE;
					goto done;
				}
				rx_reor_tbl_ptr
					->rx_reorder_ptr[(seq_num +
							  (MAX_TID_VALUE)) -
							 start_win] = payload;
			}
		}

		wlan_11n_display_tbl_ptr(pmadapter, rx_reor_tbl_ptr);

		/*
		 * Dispatch all packets sequentially from start_win until a
		 * hole is found and adjust the start_win appropriately
		 */
		ret = wlan_11n_scan_and_dispatch(priv, rx_reor_tbl_ptr);

		wlan_11n_display_tbl_ptr(pmadapter, rx_reor_tbl_ptr);
	}

done:
	if (!rx_reor_tbl_ptr->timer_context.timer_is_set ||
	    (prev_start_win != rx_reor_tbl_ptr->start_win)) {
		mlan_11n_rxreorder_timer_restart(pmadapter, rx_reor_tbl_ptr);
	}

	LEAVE();
	return ret;
}

/**
 *  @brief This function will delete an entry for a given tid/ta pair. tid/ta
 *          are taken from delba_event body
 *
 *  @param priv         A pointer to mlan_private
 *  @param tid          tid to send delba
 *  @param peer_mac     MAC address to send delba
 *  @param type         TYPE_DELBA_SENT	or TYPE_DELBA_RECEIVE
 *  @param initiator    MTRUE if we are initiator of ADDBA, MFALSE otherwise
 *  @param reason_code  delete ba reason
 *
 *  @return             N/A
 */
void mlan_11n_delete_bastream_tbl(mlan_private *priv, int tid, t_u8 *peer_mac,
				  t_u8 type, int initiator, t_u16 reason_code)
{
	RxReorderTbl *rx_reor_tbl_ptr;
	TxBAStreamTbl *ptxtbl;
	t_u8 cleanup_rx_reorder_tbl;
	raListTbl *ra_list = MNULL;
	int tid_down;

	ENTER();

	if (type == TYPE_DELBA_RECEIVE)
		cleanup_rx_reorder_tbl = (initiator) ? MTRUE : MFALSE;
	else
		cleanup_rx_reorder_tbl = (initiator) ? MFALSE : MTRUE;

	PRINTM(MEVENT,
	       "delete_bastream_tbl: " MACSTR " tid=%d, type=%d"
	       "initiator=%d reason=%d\n",
	       MAC2STR(peer_mac), tid, type, initiator, reason_code);

	if (cleanup_rx_reorder_tbl) {
		rx_reor_tbl_ptr =
			wlan_11n_get_rxreorder_tbl(priv, tid, peer_mac);
		if (!rx_reor_tbl_ptr) {
			PRINTM(MWARN, "TID, TA not found in table!\n");
			LEAVE();
			return;
		}
		wlan_11n_delete_rxreorder_tbl_entry(priv, rx_reor_tbl_ptr);
	} else {
		wlan_request_ralist_lock(priv);
		ptxtbl = wlan_11n_get_txbastream_tbl(priv, tid, peer_mac,
						     MFALSE);
		if (!ptxtbl) {
			PRINTM(MWARN, "TID, RA not found in table!\n");
			wlan_release_ralist_lock(priv);
			LEAVE();
			return;
		}
		wlan_11n_delete_txbastream_tbl_entry(priv, ptxtbl);
		wlan_release_ralist_lock(priv);
		tid_down = wlan_get_wmm_tid_down(priv, tid);
		ra_list = wlan_wmm_get_ralist_node(priv, tid_down, peer_mac);
		if (ra_list) {
			ra_list->amsdu_in_ampdu = MFALSE;
			ra_list->ba_status = BA_STREAM_NOT_SETUP;
			if (type == TYPE_DELBA_RECEIVE) {
				if (reason_code == REASON_CODE_STA_TIMEOUT)
					ra_list->del_ba_count = 0;
				else
					ra_list->del_ba_count++;
				ra_list->packet_count = 0;
/** after delba, we will try to set up BA again after sending 1k packets*/
#define MIN_BA_SETUP_PACKET_REQIRED 1024
				ra_list->ba_packet_threshold =
					MIN_BA_SETUP_PACKET_REQIRED +
					wlan_get_random_ba_threshold(
						priv->adapter);
			}
		}
	}

	LEAVE();
}

/**
 *  @brief This function handles the command response of
 *          a block ack response
 *
 *  @param priv    A pointer to mlan_private structure
 *  @param resp    A pointer to HostCmd_DS_COMMAND
 *
 *  @return        MLAN_STATUS_SUCCESS
 */
mlan_status wlan_ret_11n_addba_resp(mlan_private *priv,
				    HostCmd_DS_COMMAND *resp)
{
	HostCmd_DS_11N_ADDBA_RSP *padd_ba_rsp =
		(HostCmd_DS_11N_ADDBA_RSP *)&resp->params.add_ba_rsp;
	int tid;
	RxReorderTbl *rx_reor_tbl_ptr = MNULL;

	ENTER();

	padd_ba_rsp->status_code = wlan_le16_to_cpu(padd_ba_rsp->status_code);
	padd_ba_rsp->block_ack_param_set =
		wlan_le16_to_cpu(padd_ba_rsp->block_ack_param_set);
	padd_ba_rsp->block_ack_tmo =
		wlan_le16_to_cpu(padd_ba_rsp->block_ack_tmo);
	padd_ba_rsp->ssn = wlan_le16_to_cpu(padd_ba_rsp->ssn);

	tid = (padd_ba_rsp->block_ack_param_set & BLOCKACKPARAM_TID_MASK) >>
	      BLOCKACKPARAM_TID_POS;
	/* Check  if we had rejected the ADDBA, if yes then do not create the
	 * stream
	 */
	if (padd_ba_rsp->status_code == BA_RESULT_SUCCESS) {
		PRINTM(MCMND,
		       "ADDBA RSP: " MACSTR
		       " tid=%d ssn=%d win_size=%d,amsdu=%d\n",
		       MAC2STR(padd_ba_rsp->peer_mac_addr), tid,
		       padd_ba_rsp->ssn,
		       ((padd_ba_rsp->block_ack_param_set &
			 BLOCKACKPARAM_WINSIZE_MASK) >>
			BLOCKACKPARAM_WINSIZE_POS),
		       padd_ba_rsp->block_ack_param_set &
			       BLOCKACKPARAM_AMSDU_SUPP_MASK);

		rx_reor_tbl_ptr = wlan_11n_get_rxreorder_tbl(
			priv, tid, padd_ba_rsp->peer_mac_addr);
		if (rx_reor_tbl_ptr) {
			rx_reor_tbl_ptr->ba_status = BA_STREAM_SETUP_COMPLETE;
			if ((padd_ba_rsp->block_ack_param_set &
			     BLOCKACKPARAM_AMSDU_SUPP_MASK) &&
			    priv->add_ba_param.rx_amsdu)
				rx_reor_tbl_ptr->amsdu = MTRUE;
			else
				rx_reor_tbl_ptr->amsdu = MFALSE;
		}
	} else {
		PRINTM(MCMND, "ADDBA RSP: Failed(" MACSTR " tid=%d)\n",
		       MAC2STR(padd_ba_rsp->peer_mac_addr), tid);
		rx_reor_tbl_ptr = wlan_11n_get_rxreorder_tbl(
			priv, tid, padd_ba_rsp->peer_mac_addr);
		if (rx_reor_tbl_ptr)
			wlan_11n_delete_rxreorder_tbl_entry(priv,
							    rx_reor_tbl_ptr);
	}

	LEAVE();
	return MLAN_STATUS_SUCCESS;
}

/**
 *  @brief This function handles ba_stream_timeout event
 *
 *  @param priv     A pointer to mlan_private
 *  @param event    A pointer to structure HostCmd_DS_11N_BATIMEOUT
 *
 *  @return         N/A
 */
void wlan_11n_ba_stream_timeout(mlan_private *priv,
				HostCmd_DS_11N_BATIMEOUT *event)
{
	HostCmd_DS_11N_DELBA delba;
	mlan_status ret = MLAN_STATUS_SUCCESS;

	ENTER();

	DBG_HEXDUMP(MCMD_D, "Event:", (t_u8 *)event, 20);

	memset(priv->adapter, &delba, 0, sizeof(HostCmd_DS_11N_DELBA));
	memcpy_ext(priv->adapter, delba.peer_mac_addr, event->peer_mac_addr,
		   MLAN_MAC_ADDR_LENGTH, MLAN_MAC_ADDR_LENGTH);

	delba.del_ba_param_set |= (t_u16)event->tid << DELBA_TID_POS;
	delba.del_ba_param_set |= (t_u16)event->origninator
				  << DELBA_INITIATOR_POS;
	delba.reason_code = REASON_CODE_STA_TIMEOUT;
	ret = wlan_prepare_cmd(priv, HostCmd_CMD_11N_DELBA, 0, 0, MNULL,
			       &delba);
	if (ret)
		PRINTM(MERROR, "Failed to send cmd to FW\n");

	LEAVE();
	return;
}

/**
 *  @brief This function cleans up reorder tbl
 *
 *  @param priv     A pointer to mlan_private
 *
 *  @return         N/A
 */
void wlan_11n_cleanup_reorder_tbl(mlan_private *priv)
{
	RxReorderTbl *del_tbl_ptr;

	ENTER();

	while ((del_tbl_ptr = (RxReorderTbl *)util_peek_list(
			priv->adapter->pmoal_handle, &priv->rx_reorder_tbl_ptr,
			priv->adapter->callbacks.moal_spin_lock,
			priv->adapter->callbacks.moal_spin_unlock))) {
		wlan_11n_delete_rxreorder_tbl_entry(priv, del_tbl_ptr);
	}

	util_init_list((pmlan_linked_list)&priv->rx_reorder_tbl_ptr);

	memset(priv->adapter, priv->rx_seq, 0xff, sizeof(priv->rx_seq));
	LEAVE();
}

/**
 *  @brief This function handle the rxba_sync event
 *
 *  @param priv       A pointer to mlan_private
 *  @param event_buf  A pointer to event buf
 *  @param len        event_buf length
 *  @return           N/A
 */
void wlan_11n_rxba_sync_event(mlan_private *priv, t_u8 *event_buf, t_u16 len)
{
	MrvlIEtypes_RxBaSync_t *tlv_rxba = (MrvlIEtypes_RxBaSync_t *)event_buf;
	t_u16 tlv_type, tlv_len;
	RxReorderTbl *rx_reor_tbl_ptr = MNULL;
	t_u8 i, j;
	t_u16 seq_num = 0;
	int tlv_buf_left = len;
	ENTER();

	DBG_HEXDUMP(MEVT_D, "RXBA_SYNC_EVT", event_buf, len);
	while (tlv_buf_left >= (int)sizeof(MrvlIEtypes_RxBaSync_t)) {
		tlv_type = wlan_le16_to_cpu(tlv_rxba->header.type);
		tlv_len = wlan_le16_to_cpu(tlv_rxba->header.len);
		if (tlv_type != TLV_TYPE_RXBA_SYNC) {
			PRINTM(MERROR, "Wrong TLV id=0x%x\n", tlv_type);
			goto done;
		}
		tlv_rxba->seq_num = wlan_le16_to_cpu(tlv_rxba->seq_num);
		tlv_rxba->bitmap_len = wlan_le16_to_cpu(tlv_rxba->bitmap_len);
		PRINTM(MEVENT, MACSTR " tid=%d seq_num=%d bitmap_len=%d\n",
		       MAC2STR(tlv_rxba->mac), tlv_rxba->tid, tlv_rxba->seq_num,
		       tlv_rxba->bitmap_len);
		rx_reor_tbl_ptr = wlan_11n_get_rxreorder_tbl(
			priv, tlv_rxba->tid, tlv_rxba->mac);
		if (!rx_reor_tbl_ptr) {
			PRINTM(MEVENT, "Can not find rx_reorder_tbl\n");
			goto done;
		}
		if (rx_reor_tbl_ptr->force_no_drop) {
			PRINTM(MEVENT, "Ignore RXBA_SYNC_EVT in resume\n");
			goto done;
		}
		for (i = 0; i < tlv_rxba->bitmap_len; i++) {
			for (j = 0; j < 8; j++) {
				if (tlv_rxba->bitmap[i] & (1 << j)) {
					seq_num = (tlv_rxba->seq_num + i * 8 +
						   j) &
						  (MAX_TID_VALUE - 1);
					PRINTM(MEVENT,
					       "Fw dropped packet, seq=%d start_win=%d, win_size=%d\n",
					       seq_num,
					       rx_reor_tbl_ptr->start_win,
					       rx_reor_tbl_ptr->win_size);
					if (MLAN_STATUS_SUCCESS !=
					    mlan_11n_rxreorder_pkt(
						    priv, seq_num,
						    tlv_rxba->tid,
						    tlv_rxba->mac, 0,
						    (t_void *)
							    RX_PKT_DROPPED_IN_FW)) {
						PRINTM(MERROR,
						       "Fail to handle dropped packet, seq=%d\n",
						       seq_num);
					}
				}
			}
		}
		tlv_buf_left -= (sizeof(MrvlIEtypesHeader_t) + tlv_len);
		tlv_rxba =
			(MrvlIEtypes_RxBaSync_t *)((t_u8 *)tlv_rxba + tlv_len +
						   sizeof(MrvlIEtypesHeader_t));
	}
done:
	LEAVE();
	return;
}

/**
 *  @brief This function cleans up reorder tbl for specific station
 *
 *  @param priv     A pointer to mlan_private
 *  @param ta       ta to find in reordering table
 *  @return         N/A
 */
void wlan_cleanup_reorder_tbl(mlan_private *priv, t_u8 *ta)
{
	RxReorderTbl *rx_reor_tbl_ptr = MNULL;
	t_u8 i;
	ENTER();
	for (i = 0; i < MAX_NUM_TID; ++i) {
		rx_reor_tbl_ptr = wlan_11n_get_rxreorder_tbl(priv, i, ta);
		if (rx_reor_tbl_ptr)
			wlan_11n_delete_rxreorder_tbl_entry(priv,
							    rx_reor_tbl_ptr);
	}
	LEAVE();
	return;
}

/**
 *  @brief This function will set force_no_drop flag in rxreorder_tbl.
 *
 *  @param priv    A pointer to mlan_private
 *  @param flag    MTRUE/MFALSE
 *
 *  @return        N/A
 */
static void wlan_set_rxreorder_tbl_no_drop_flag(mlan_private *priv, t_u8 flag)
{
	RxReorderTbl *rx_reor_tbl_ptr;

	ENTER();

	rx_reor_tbl_ptr = (RxReorderTbl *)util_peek_list(
		priv->adapter->pmoal_handle, &priv->rx_reorder_tbl_ptr,
		priv->adapter->callbacks.moal_spin_lock,
		priv->adapter->callbacks.moal_spin_unlock);
	if (!rx_reor_tbl_ptr) {
		LEAVE();
		return;
	}

	while (rx_reor_tbl_ptr != (RxReorderTbl *)&priv->rx_reorder_tbl_ptr) {
		rx_reor_tbl_ptr->force_no_drop = flag;
		rx_reor_tbl_ptr = rx_reor_tbl_ptr->pnext;
	}

	LEAVE();
	return;
}

/**
 *  @brief This function update all the rx_reorder_tbl's force_no_drop flag
 *
 *  @param pmadapter    A pointer to mlan_adapter
 *  @param flag         MTRUE/MFALSE
 *  @return             N/A
 */
void wlan_update_rxreorder_tbl(pmlan_adapter pmadapter, t_u8 flag)
{
	t_u8 i;
	pmlan_private priv = MNULL;
	for (i = 0; i < pmadapter->priv_num; i++) {
		if (pmadapter->priv[i]) {
			priv = pmadapter->priv[i];
			wlan_set_rxreorder_tbl_no_drop_flag(priv, flag);
		}
	}
	return;
}

/**
 *  @brief This function will flush the data  in rxreorder_tbl.
 *  	   which has flush_data flag on.
 *
 *  @param priv    A pointer to mlan_private
 *
 *  @return        N/A
 */
static void wlan_flush_priv_rxreorder_tbl(mlan_private *priv)
{
	RxReorderTbl *rx_reor_tbl_ptr;

	ENTER();

	rx_reor_tbl_ptr = (RxReorderTbl *)util_peek_list(
		priv->adapter->pmoal_handle, &priv->rx_reorder_tbl_ptr,
		priv->adapter->callbacks.moal_spin_lock,
		priv->adapter->callbacks.moal_spin_unlock);
	if (!rx_reor_tbl_ptr) {
		LEAVE();
		return;
	}

	while (rx_reor_tbl_ptr != (RxReorderTbl *)&priv->rx_reorder_tbl_ptr) {
		if (rx_reor_tbl_ptr->flush_data) {
			rx_reor_tbl_ptr->flush_data = MFALSE;
			wlan_start_flush_data(priv, rx_reor_tbl_ptr);
		}
		rx_reor_tbl_ptr = rx_reor_tbl_ptr->pnext;
	}

	LEAVE();
	return;
}

/**
 *  @brief This function update all the rx_reorder_tbl's force_no_drop flag
 *
 *  @param pmadapter    A pointer to mlan_adapter
 *  @return             N/A
 */
void wlan_flush_rxreorder_tbl(pmlan_adapter pmadapter)
{
	t_u8 i;
	pmlan_private priv = MNULL;
	for (i = 0; i < pmadapter->priv_num; i++) {
		if (pmadapter->priv[i]) {
			priv = pmadapter->priv[i];
			wlan_flush_priv_rxreorder_tbl(priv);
		}
	}
	return;
}

/**
 *  @brief This function update all the rx_win_size based on coex flag
 *
 *  @param pmadapter    A pointer to mlan_adapter
 *  @param coex_flag    coex flag
 *
 *  @return             N/A
 */
static void wlan_update_ampdu_rxwinsize(pmlan_adapter pmadapter, t_u8 coex_flag)
{
	t_u8 i;
	t_u8 j;
	t_u32 rx_win_size = 0;
	pmlan_private priv = MNULL;

	ENTER();
	if (!pmadapter->coex_rx_winsize) {
		LEAVE();
		return;
	}
	PRINTM(MEVENT, "Update rxwinsize %d\n", coex_flag);
	for (i = 0; i < pmadapter->priv_num; i++) {
		if (pmadapter->priv[i]) {
			priv = pmadapter->priv[i];
			rx_win_size = priv->add_ba_param.rx_win_size;
			if (coex_flag == MTRUE) {
#ifdef STA_SUPPORT
				if (priv->bss_type == MLAN_BSS_TYPE_STA)
					priv->add_ba_param.rx_win_size =
						MLAN_STA_COEX_AMPDU_DEF_RXWINSIZE;
#endif
#ifdef WIFI_DIRECT_SUPPORT
				if (priv->bss_type == MLAN_BSS_TYPE_WIFIDIRECT)
					priv->add_ba_param.rx_win_size =
						MLAN_WFD_COEX_AMPDU_DEF_RXWINSIZE;
#endif
#ifdef UAP_SUPPORT
				if (priv->bss_type == MLAN_BSS_TYPE_UAP)
					priv->add_ba_param.rx_win_size =
						MLAN_UAP_COEX_AMPDU_DEF_RXWINSIZE;
#endif
				priv->add_ba_param.rx_win_size =
					MIN(priv->add_ba_param.rx_win_size,
					    priv->user_rxwinsize);
			} else {
				priv->add_ba_param.rx_win_size =
					priv->user_rxwinsize;
			}
			if (pmadapter->coex_win_size &&
			    pmadapter->coex_rx_win_size)
				priv->add_ba_param.rx_win_size =
					pmadapter->coex_rx_win_size;
			if (rx_win_size != priv->add_ba_param.rx_win_size) {
				if (priv->media_connected == MTRUE) {
					for (j = 0; j < MAX_NUM_TID; j++)
						wlan_11n_delba(priv, j);
					wlan_recv_event(
						priv,
						MLAN_EVENT_ID_DRV_DEFER_HANDLING,
						MNULL);
				}
			}
		}
	}
	LEAVE();
	return;
}

/**
 *  @brief check coex for
 *
 *  @param pmadapter    A pointer to mlan_adapter
 *
 *  @return             N/A
 */
void wlan_coex_ampdu_rxwinsize(pmlan_adapter pmadapter)
{
	t_u8 i;
	pmlan_private priv = MNULL;
	t_u8 count = 0;
	for (i = 0; i < pmadapter->priv_num; i++) {
		if (pmadapter->priv[i]) {
			priv = pmadapter->priv[i];
#ifdef STA_SUPPORT
			if (GET_BSS_ROLE((mlan_private *)priv) ==
			    MLAN_BSS_ROLE_STA) {
				if (priv->media_connected == MTRUE)
					count++;
			}
#endif
#ifdef UAP_SUPPORT
			if (GET_BSS_ROLE((mlan_private *)priv) ==
			    MLAN_BSS_ROLE_UAP) {
				if (priv->uap_bss_started)
					count++;
			}
#endif
		}
		if (count >= 2)
			break;
	}
	if (count >= 2)
		wlan_update_ampdu_rxwinsize(pmadapter, MTRUE);
	else
		wlan_update_ampdu_rxwinsize(pmadapter, MFALSE);
	return;
}