/******************************************************************************
 *
 * Copyright(c) 2007 - 2012 Realtek Corporation. All rights reserved.
 *
 * This program is free software; you can redistribute it and/or modify it
 * under the terms of version 2 of the GNU General Public License as
 * published by the Free Software Foundation.
 *
 * This program is distributed in the hope that it will be useful, but WITHOUT
 * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
 * FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License for
 * more details.
 *
 * You should have received a copy of the GNU General Public License along with
 * this program; if not, write to the Free Software Foundation, Inc.,
 * 51 Franklin Street, Fifth Floor, Boston, MA 02110, USA
 *
 *
 ******************************************************************************/
#define _RTL8703BS_RECV_C_

#include <rtl8703b_hal.h>


static s32 initrecvbuf(struct recv_buf *precvbuf, PADAPTER padapter)
{
	_rtw_init_listhead(&precvbuf->list);
	_rtw_spinlock_init(&precvbuf->recvbuf_lock);

	precvbuf->adapter = padapter;

	return _SUCCESS;
}

static void freerecvbuf(struct recv_buf *precvbuf)
{
	_rtw_spinlock_free(&precvbuf->recvbuf_lock);
}

static s32 pre_recv_entry(union recv_frame *precvframe, struct recv_buf	*precvbuf, u8 *pphy_status)
{
	s32 ret=_SUCCESS;
#ifdef CONFIG_CONCURRENT_MODE
	u8 *secondary_myid, *paddr1;
	union recv_frame	*precvframe_if2 = NULL;
	_adapter *primary_padapter = precvframe->u.hdr.adapter;
	_adapter *secondary_padapter = primary_padapter->pbuddy_adapter;
	struct recv_priv *precvpriv = &primary_padapter->recvpriv;
	_queue *pfree_recv_queue = &precvpriv->free_recv_queue;
	HAL_DATA_TYPE	*pHalData = GET_HAL_DATA(primary_padapter);

	if(!secondary_padapter)
		return ret;

	paddr1 = GetAddr1Ptr(precvframe->u.hdr.rx_data);

	if(IS_MCAST(paddr1) == _FALSE)//unicast packets
	{
		secondary_myid = adapter_mac_addr(secondary_padapter);

		if(_rtw_memcmp(paddr1, secondary_myid, ETH_ALEN))
		{
			//change to secondary interface
			precvframe->u.hdr.adapter = secondary_padapter;
		}

		//ret = recv_entry(precvframe);

	}
	else // Handle BC/MC Packets
	{
		//clone/copy to if2
		_pkt	 *pkt_copy = NULL;
		struct rx_pkt_attrib *pattrib = NULL;

		precvframe_if2 = rtw_alloc_recvframe(pfree_recv_queue);

		if(!precvframe_if2)
			return _FAIL;

		precvframe_if2->u.hdr.adapter = secondary_padapter;
		_rtw_memcpy(&precvframe_if2->u.hdr.attrib, &precvframe->u.hdr.attrib, sizeof(struct rx_pkt_attrib));
		pattrib = &precvframe_if2->u.hdr.attrib;

		//driver need to set skb len for skb_copy().
		//If skb->len is zero, skb_copy() will not copy data from original skb.
		skb_put(precvframe->u.hdr.pkt, pattrib->pkt_len);

		pkt_copy = rtw_skb_copy( precvframe->u.hdr.pkt);
		if (pkt_copy == NULL)
		{
			if((pattrib->mfrag == 1)&&(pattrib->frag_num == 0))
			{
				DBG_8192C("pre_recv_entry(): rtw_skb_copy fail , drop frag frame \n");
				rtw_free_recvframe(precvframe, &precvpriv->free_recv_queue);
				return ret;
			}

			pkt_copy = rtw_skb_clone( precvframe->u.hdr.pkt);
			if(pkt_copy == NULL)
			{
				DBG_8192C("pre_recv_entry(): rtw_skb_clone fail , drop frame\n");
				rtw_free_recvframe(precvframe, &precvpriv->free_recv_queue);
				return ret;
			}
		}

		pkt_copy->dev = secondary_padapter->pnetdev;

		precvframe_if2->u.hdr.pkt = pkt_copy;
		precvframe_if2->u.hdr.rx_head = pkt_copy->head;
		precvframe_if2->u.hdr.rx_data = pkt_copy->data;
		precvframe_if2->u.hdr.rx_tail = skb_tail_pointer(pkt_copy);
		precvframe_if2->u.hdr.rx_end = skb_end_pointer(pkt_copy);
		precvframe_if2->u.hdr.len = pkt_copy->len;

		//recvframe_put(precvframe_if2, pattrib->pkt_len);

		if ( pHalData->ReceiveConfig & RCR_APPFCS)
			recvframe_pull_tail(precvframe_if2, IEEE80211_FCS_LEN);

		if (pattrib->physt)
			rx_query_phy_status(precvframe_if2, pphy_status);

		if(rtw_recv_entry(precvframe_if2) != _SUCCESS)
		{
			RT_TRACE(_module_rtl871x_recv_c_,_drv_err_,
				("recvbuf2recvframe: rtw_recv_entry(precvframe) != _SUCCESS\n"));
		}
	}

	if (precvframe->u.hdr.attrib.physt)
		rx_query_phy_status(precvframe, pphy_status);

	ret = rtw_recv_entry(precvframe);
#endif

	return ret;

}

#ifdef CONFIG_SDIO_RX_COPY
static void rtl8703bs_recv_tasklet(void *priv)
{
	PADAPTER			padapter;
	PHAL_DATA_TYPE		pHalData;
	struct recv_priv		*precvpriv;
	struct recv_buf 	*precvbuf;
	union recv_frame		*precvframe;
	struct recv_frame_hdr	*phdr;
	struct rx_pkt_attrib	*pattrib;
	_irqL	irql;
	u8		*ptr;
	u32 	pkt_len, pkt_offset, skb_len, alloc_sz;
	_pkt		*pkt_copy = NULL;
	u8		shift_sz = 0, rx_report_sz = 0;


	padapter = (PADAPTER)priv;
	pHalData = GET_HAL_DATA(padapter);
	precvpriv = &padapter->recvpriv;

	do {
		precvbuf = rtw_dequeue_recvbuf(&precvpriv->recv_buf_pending_queue);
		if (NULL == precvbuf) break;

		ptr = precvbuf->pdata;

		while (ptr < precvbuf->ptail)
		{
			precvframe = rtw_alloc_recvframe(&precvpriv->free_recv_queue);
			if (precvframe == NULL)
			{
				DBG_8192C("%s: no enough recv frame!\n", __FUNCTION__);
				rtw_enqueue_recvbuf_to_head(precvbuf, &precvpriv->recv_buf_pending_queue);

				// The case of can't allocte recvframe should be temporary,
				// schedule again and hope recvframe is available next time.
#ifdef PLATFORM_LINUX
				tasklet_schedule(&precvpriv->recv_tasklet);
#endif
				return;
			}

			//rx desc parsing
			rtl8703b_query_rx_desc_status(precvframe, ptr);

			pattrib = &precvframe->u.hdr.attrib;

			// fix Hardware RX data error, drop whole recv_buffer
			if ((!(pHalData->ReceiveConfig & RCR_ACRC32)) && pattrib->crc_err)
			{
#if !(MP_DRIVER==1)
				DBG_8192C("%s()-%d: RX Warning! rx CRC ERROR !!\n", __FUNCTION__, __LINE__);
#endif
				rtw_free_recvframe(precvframe, &precvpriv->free_recv_queue);
				break;
			}

			rx_report_sz = RXDESC_SIZE + pattrib->drvinfo_sz;
			pkt_offset = rx_report_sz + pattrib->shift_sz + pattrib->pkt_len;

			if ((ptr + pkt_offset) > precvbuf->ptail) {
				DBG_8192C("%s()-%d: : next pkt len(%p,%d) exceed ptail(%p)!\n", __FUNCTION__, __LINE__, ptr, pkt_offset, precvbuf->ptail);
				rtw_free_recvframe(precvframe, &precvpriv->free_recv_queue);
				break;
			}

			if ((pattrib->crc_err) || (pattrib->icv_err))
			{
#ifdef CONFIG_MP_INCLUDED
				if (padapter->registrypriv.mp_mode == 1)
				{
					if ((check_fwstate(&padapter->mlmepriv, WIFI_MP_STATE) == _TRUE))//&&(padapter->mppriv.check_mp_pkt == 0))
					{
						if (pattrib->crc_err == 1)
							padapter->mppriv.rx_crcerrpktcount++;
					}
				}
				else
#endif
				{
					DBG_8192C("%s: crc_err=%d icv_err=%d, skip!\n", __FUNCTION__, pattrib->crc_err, pattrib->icv_err);
				}
				rtw_free_recvframe(precvframe, &precvpriv->free_recv_queue);
			}
			else
			{
				//	Modified by Albert 20101213
				//	For 8 bytes IP header alignment.
				if (pattrib->qos)	//	Qos data, wireless lan header length is 26
				{
					shift_sz = 6;
				}
				else
				{
					shift_sz = 0;
				}

				skb_len = pattrib->pkt_len;

				// for first fragment packet, driver need allocate 1536+drvinfo_sz+RXDESC_SIZE to defrag packet.
				// modify alloc_sz for recvive crc error packet by thomas 2011-06-02
				if((pattrib->mfrag == 1)&&(pattrib->frag_num == 0)){
					//alloc_sz = 1664;	//1664 is 128 alignment.
					if(skb_len <= 1650)
						alloc_sz = 1664;
					else
						alloc_sz = skb_len + 14;
				}
				else {
					alloc_sz = skb_len;
					//	6 is for IP header 8 bytes alignment in QoS packet case.
					//	8 is for skb->data 4 bytes alignment.
					alloc_sz += 14;
				}

				pkt_copy = rtw_skb_alloc(alloc_sz);

				if (pkt_copy)
				{
					pkt_copy->dev = padapter->pnetdev;
					precvframe->u.hdr.pkt = pkt_copy;
					skb_reserve( pkt_copy, 8 - ((SIZE_PTR)( pkt_copy->data ) & 7 ));//force pkt_copy->data at 8-byte alignment address
					skb_reserve( pkt_copy, shift_sz );//force ip_hdr at 8-byte alignment address according to shift_sz.
					_rtw_memcpy(pkt_copy->data, (ptr + rx_report_sz + pattrib->shift_sz), skb_len);
					precvframe->u.hdr.rx_head = pkt_copy->head;
					precvframe->u.hdr.rx_data = precvframe->u.hdr.rx_tail = pkt_copy->data;
					precvframe->u.hdr.rx_end = skb_end_pointer(pkt_copy);
				}
				else
				{
					if((pattrib->mfrag == 1)&&(pattrib->frag_num == 0))
					{
						DBG_8192C("%s: alloc_skb fail, drop frag frame\n", __FUNCTION__);
						rtw_free_recvframe(precvframe, &precvpriv->free_recv_queue);
						break;
					}

					precvframe->u.hdr.pkt = rtw_skb_clone(precvbuf->pskb);
					if(precvframe->u.hdr.pkt)
					{
						_pkt	*pkt_clone = precvframe->u.hdr.pkt;

						pkt_clone->data = ptr + rx_report_sz + pattrib->shift_sz;
						skb_reset_tail_pointer(pkt_clone);
						precvframe->u.hdr.rx_head = precvframe->u.hdr.rx_data = precvframe->u.hdr.rx_tail
							= pkt_clone->data;
						precvframe->u.hdr.rx_end =	pkt_clone->data + skb_len;
					}
					else
					{
						DBG_8192C("%s: rtw_skb_clone fail\n", __FUNCTION__);
						rtw_free_recvframe(precvframe, &precvpriv->free_recv_queue);
						break;
					}
				}

				recvframe_put(precvframe, skb_len);
				//recvframe_pull(precvframe, drvinfo_sz + RXDESC_SIZE);

				if (pHalData->ReceiveConfig & RCR_APPFCS)
					recvframe_pull_tail(precvframe, IEEE80211_FCS_LEN);

				// move to drv info position
				ptr += RXDESC_SIZE;

				// update drv info
				if (pHalData->ReceiveConfig & RCR_APP_BA_SSN) {
					//rtl8703s_update_bassn(padapter, pdrvinfo);
					ptr += 4;
				}

				if (pattrib->pkt_rpt_type == NORMAL_RX) {
					// skip the rx packet with abnormal length
					if (pattrib->pkt_len < 14 || pattrib->pkt_len > 8192) {	
						DBG_8192C("skip abnormal rx packet(%d)\n", pattrib->pkt_len);
						rtw_free_recvframe(precvframe, &precvpriv->free_recv_queue);
						break;
					}

#ifdef CONFIG_CONCURRENT_MODE
					if (rtw_buddy_adapter_up(padapter))
					{
						if (pre_recv_entry(precvframe, precvbuf, ptr) != _SUCCESS) {
							RT_TRACE(_module_rtl871x_recv_c_,_drv_err_,
								("recvbuf2recvframe: recv_entry(precvframe) != _SUCCESS\n"));
						}
					}
					else
#endif
					{
						if (pattrib->physt)
							rx_query_phy_status(precvframe, ptr);

						if (rtw_recv_entry(precvframe) != _SUCCESS) {
							RT_TRACE(_module_rtl871x_recv_c_, _drv_dump_, ("%s: rtw_recv_entry(precvframe) != _SUCCESS\n",__FUNCTION__));
						}
					}
				}
				else {
#ifdef CONFIG_C2H_PACKET_EN
					if (pattrib->pkt_rpt_type == C2H_PACKET) {
						rtl8703b_c2h_packet_handler(padapter, precvframe->u.hdr.rx_data, pattrib->pkt_len);
					}
					else {
						DBG_8192C("%s: [WARNNING] RX type(%d) not be handled!\n",
							__FUNCTION__, pattrib->pkt_rpt_type);
					}
#endif
					rtw_free_recvframe(precvframe, &precvpriv->free_recv_queue);
				}
			}

			pkt_offset = _RND8(pkt_offset);
			precvbuf->pdata += pkt_offset;
			ptr = precvbuf->pdata;
			precvframe = NULL;
			pkt_copy = NULL;
		}

		rtw_enqueue_recvbuf(precvbuf, &precvpriv->free_recv_buf_queue);
	} while (1);

}
#else
static void rtl8703bs_recv_tasklet(void *priv)
{
	PADAPTER				padapter;
	PHAL_DATA_TYPE			pHalData;
	struct recv_priv		*precvpriv;
	struct recv_buf 		*precvbuf;
	union recv_frame		*precvframe;
	struct recv_frame_hdr	*phdr;
	struct rx_pkt_attrib	*pattrib;
	u8			*ptr;
	_pkt		*ppkt;
	u32 		pkt_offset;
	_irqL		irql;


	padapter = (PADAPTER)priv;
	pHalData = GET_HAL_DATA(padapter);
	precvpriv = &padapter->recvpriv;

	do {
		precvbuf = rtw_dequeue_recvbuf(&precvpriv->recv_buf_pending_queue);
		if (NULL == precvbuf) break;

		ptr = precvbuf->pdata;

		while (ptr < precvbuf->ptail)
		{
			precvframe = rtw_alloc_recvframe(&precvpriv->free_recv_queue);
			if (precvframe == NULL) {
				RT_TRACE(_module_rtl871x_recv_c_, _drv_err_, ("rtl8703bs_recv_tasklet: no enough recv frame!\n"));
				rtw_enqueue_recvbuf_to_head(precvbuf, &precvpriv->recv_buf_pending_queue);

				// The case of can't allocte recvframe should be temporary,
				// schedule again and hope recvframe is available next time.
#ifdef PLATFORM_LINUX
				tasklet_schedule(&precvpriv->recv_tasklet);
#endif
				return;
			}

			phdr = &precvframe->u.hdr;
			pattrib = &phdr->attrib;

			rtl8703b_query_rx_desc_status(precvframe, ptr);

#if 0
			{
				int i, len = 64;
				u8 *pptr = ptr;

				if((*(pptr + RXDESC_SIZE + pattrib->drvinfo_sz) != 0x80) && (*(pptr + RXDESC_SIZE + pattrib->drvinfo_sz) != 0x40))
				{
					DBG_871X("##############RxDESC############### \n");
					for(i=0; i<32;i=i+16)
						DBG_871X("%02X:%02X:%02X:%02X:%02X:%02X:%02X:%02X:%02X:%02X:%02X:%02X:%02X:%02X:%02X:%02X:\n", *(pptr+i),
						*(pptr+i+1), *(pptr+i+2) ,*(pptr+i+3) ,*(pptr+i+4),*(pptr+i+5), *(pptr+i+6), *(pptr+i+7), *(pptr+i+8), *(pptr+i+9), *(pptr+i+10),
						 *(pptr+i+11), *(pptr+i+12), *(pptr+i+13), *(pptr+i+14), *(pptr+i+15));
					
					if(pattrib->pkt_len < 100)
						len = pattrib->pkt_len;
					pptr = ptr + RXDESC_SIZE + pattrib->drvinfo_sz;
					DBG_871X("##############Len=%d############### \n", pattrib->pkt_len);
					for(i=0; i<len;i=i+16)
						DBG_871X("%02X:%02X:%02X:%02X:%02X:%02X:%02X:%02X:%02X:%02X:%02X:%02X:%02X:%02X:%02X:%02X:\n", *(pptr+i),
						*(pptr+i+1), *(pptr+i+2) ,*(pptr+i+3) ,*(pptr+i+4),*(pptr+i+5), *(pptr+i+6), *(pptr+i+7), *(pptr+i+8), *(pptr+i+9), *(pptr+i+10),
						 *(pptr+i+11), *(pptr+i+12), *(pptr+i+13), *(pptr+i+14), *(pptr+i+15));
					DBG_871X("############################# \n");
				}
			}
#endif

			// fix Hardware RX data error, drop whole recv_buffer
			if ((!(pHalData->ReceiveConfig & RCR_ACRC32)) && pattrib->crc_err)
			{
				DBG_8192C("%s()-%d: RX Warning! rx CRC ERROR !!\n", __FUNCTION__, __LINE__);
				rtw_free_recvframe(precvframe, &precvpriv->free_recv_queue);
				break;
			}

			pkt_offset = RXDESC_SIZE + pattrib->drvinfo_sz + pattrib->pkt_len;
#if 0 // reduce check to speed up
			if ((ptr + pkt_offset) > precvbuf->ptail) {
				RT_TRACE(_module_rtl871x_recv_c_, _drv_err_,
						("%s: next pkt len(%p,%d) exceed ptail(%p)!\n",
						__FUNCTION__, ptr, pkt_offset, precvbuf->ptail));
				rtw_free_recvframe(precvframe, &precvpriv->free_recv_queue);
				break;
			}
#endif

			if ((pattrib->crc_err) || (pattrib->icv_err))
			{
#ifdef CONFIG_MP_INCLUDED
				if (padapter->registrypriv.mp_mode == 1)
				{
					if ((check_fwstate(&padapter->mlmepriv, WIFI_MP_STATE) == _TRUE))//&&(padapter->mppriv.check_mp_pkt == 0))
					{
						if (pattrib->crc_err == 1)
							padapter->mppriv.rx_crcerrpktcount++;
					}
				}
				else
#endif
				{
					DBG_8192C("%s: crc_err=%d icv_err=%d, skip!\n", __FUNCTION__, pattrib->crc_err, pattrib->icv_err);
				}
				rtw_free_recvframe(precvframe, &precvpriv->free_recv_queue);
			}
			else
			{
				ppkt = rtw_skb_clone(precvbuf->pskb);
				if (ppkt == NULL) {
					DBG_8192C("%s: no enough memory to allocate SKB!\n", __FUNCTION__);
					rtw_free_recvframe(precvframe, &precvpriv->free_recv_queue);
					rtw_enqueue_recvbuf_to_head(precvbuf, &precvpriv->recv_buf_pending_queue);

					// The case of can't allocte skb is serious and may never be recovered,
					// once bDriverStopped is enable, this task should be stopped.
					if (padapter->bDriverStopped == _FALSE) {
#ifdef PLATFORM_LINUX
						tasklet_schedule(&precvpriv->recv_tasklet);
#endif
					}

					return;
				}

				phdr->pkt = ppkt;
				phdr->len = 0;
				phdr->rx_head = precvbuf->phead;
				phdr->rx_data = phdr->rx_tail = precvbuf->pdata;
				phdr->rx_end = precvbuf->pend;
				recvframe_put(precvframe, pkt_offset);
				recvframe_pull(precvframe, RXDESC_SIZE + pattrib->drvinfo_sz);
				if (pHalData->ReceiveConfig & RCR_APPFCS)
					recvframe_pull_tail(precvframe, IEEE80211_FCS_LEN);

				// move to drv info position
				ptr += RXDESC_SIZE;

				// update drv info
				if (pHalData->ReceiveConfig & RCR_APP_BA_SSN) {
					//rtl8703s_update_bassn(padapter, pdrvinfo);
					ptr += 4;
				}

				if (pattrib->pkt_rpt_type == NORMAL_RX) {
#ifdef CONFIG_CONCURRENT_MODE
					if (rtw_buddy_adapter_up(padapter))
					{
						if (pre_recv_entry(precvframe, precvbuf, ptr) != _SUCCESS) {
							RT_TRACE(_module_rtl871x_recv_c_,_drv_err_,
								("recvbuf2recvframe: recv_entry(precvframe) != _SUCCESS\n"));
						}
					}
					else
#endif
					{
						if (pattrib->physt)
							rx_query_phy_status(precvframe, ptr);

						if (rtw_recv_entry(precvframe) != _SUCCESS)
						{
							RT_TRACE(_module_rtl871x_recv_c_, _drv_info_, ("rtl8703bs_recv_tasklet: rtw_recv_entry(precvframe) != _SUCCESS\n"));
						}
					}
				}
				else {
#ifdef CONFIG_C2H_PACKET_EN
					if (pattrib->pkt_rpt_type == C2H_PACKET) {
						rtl8703b_c2h_packet_handler(padapter, precvframe->u.hdr.rx_data, pattrib->pkt_len);
					}
					else {
						DBG_8192C("%s: [WARNNING] RX type(%d) not be handled!\n",
							__FUNCTION__, pattrib->pkt_rpt_type);
					}
#endif
					rtw_free_recvframe(precvframe, &precvpriv->free_recv_queue);
				}
			}

			pkt_offset = _RND8(pkt_offset);
			precvbuf->pdata += pkt_offset;
			ptr = precvbuf->pdata;
		}

		rtw_skb_free(precvbuf->pskb);
		precvbuf->pskb = NULL;
		rtw_enqueue_recvbuf(precvbuf, &precvpriv->free_recv_buf_queue);
	} while (1);
}
#endif

/*
 * Initialize recv private variable for hardware dependent
 * 1. recv buf
 * 2. recv tasklet
 *
 */
s32 rtl8703bs_init_recv_priv(PADAPTER padapter)
{
	s32			res;
	u32			i, n;
	struct recv_priv	*precvpriv;
	struct recv_buf		*precvbuf;


	res = _SUCCESS;
	precvpriv = &padapter->recvpriv;

	//3 1. init recv buffer
	_rtw_init_queue(&precvpriv->free_recv_buf_queue);
	_rtw_init_queue(&precvpriv->recv_buf_pending_queue);

	n = NR_RECVBUFF * sizeof(struct recv_buf) + 4;
	precvpriv->pallocated_recv_buf = rtw_zmalloc(n);
	if (precvpriv->pallocated_recv_buf == NULL) {
		res = _FAIL;
		RT_TRACE(_module_rtl871x_recv_c_, _drv_err_, ("alloc recv_buf fail!\n"));
		goto exit;
	}

	precvpriv->precv_buf = (u8*)N_BYTE_ALIGMENT((SIZE_PTR)(precvpriv->pallocated_recv_buf), 4);

	// init each recv buffer
	precvbuf = (struct recv_buf*)precvpriv->precv_buf;
	for (i = 0; i < NR_RECVBUFF; i++)
	{
		res = initrecvbuf(precvbuf, padapter);
		if (res == _FAIL)
			break;

		res = rtw_os_recvbuf_resource_alloc(padapter, precvbuf);
		if (res == _FAIL) {
			freerecvbuf(precvbuf);
			break;
		}

#ifdef CONFIG_SDIO_RX_COPY
		if (precvbuf->pskb == NULL) {
			SIZE_PTR tmpaddr=0;
			SIZE_PTR alignment=0;

			precvbuf->pskb = rtw_skb_alloc(MAX_RECVBUF_SZ + RECVBUFF_ALIGN_SZ);

			if(precvbuf->pskb)
			{
				precvbuf->pskb->dev = padapter->pnetdev;

				tmpaddr = (SIZE_PTR)precvbuf->pskb->data;
				alignment = tmpaddr & (RECVBUFF_ALIGN_SZ-1);
				skb_reserve(precvbuf->pskb, (RECVBUFF_ALIGN_SZ - alignment));
			}

			if (precvbuf->pskb == NULL) {
				DBG_871X("%s: alloc_skb fail!\n", __FUNCTION__);
			}
		}
#endif

		rtw_list_insert_tail(&precvbuf->list, &precvpriv->free_recv_buf_queue.queue);

		precvbuf++;
	}
	precvpriv->free_recv_buf_queue_cnt = i;

	if (res == _FAIL)
		goto initbuferror;

	//3 2. init tasklet
#ifdef PLATFORM_LINUX
	tasklet_init(&precvpriv->recv_tasklet,
	     (void(*)(unsigned long))rtl8703bs_recv_tasklet,
	     (unsigned long)padapter);
#endif

	goto exit;

initbuferror:
	precvbuf = (struct recv_buf*)precvpriv->precv_buf;
	if (precvbuf) {
		n = precvpriv->free_recv_buf_queue_cnt;
		precvpriv->free_recv_buf_queue_cnt = 0;
		for (i = 0; i < n ; i++)
		{
			rtw_list_delete(&precvbuf->list);
			rtw_os_recvbuf_resource_free(padapter, precvbuf);
			freerecvbuf(precvbuf);
			precvbuf++;
		}
		precvpriv->precv_buf = NULL;
	}

	if (precvpriv->pallocated_recv_buf) {
		n = NR_RECVBUFF * sizeof(struct recv_buf) + 4;
		rtw_mfree(precvpriv->pallocated_recv_buf, n);
		precvpriv->pallocated_recv_buf = NULL;
	}

exit:
	return res;
}

/*
 * Free recv private variable of hardware dependent
 * 1. recv buf
 * 2. recv tasklet
 *
 */
void rtl8703bs_free_recv_priv(PADAPTER padapter)
{
	u32			i, n;
	struct recv_priv	*precvpriv;
	struct recv_buf		*precvbuf;


	precvpriv = &padapter->recvpriv;

	//3 1. kill tasklet
#ifdef PLATFORM_LINUX
	tasklet_kill(&precvpriv->recv_tasklet);
#endif

	//3 2. free all recv buffers
	precvbuf = (struct recv_buf*)precvpriv->precv_buf;
	if (precvbuf) {
		n = NR_RECVBUFF;
		precvpriv->free_recv_buf_queue_cnt = 0;
		for (i = 0; i < n ; i++)
		{
			rtw_list_delete(&precvbuf->list);
			rtw_os_recvbuf_resource_free(padapter, precvbuf);
			freerecvbuf(precvbuf);
			precvbuf++;
		}
		precvpriv->precv_buf = NULL;
	}

	if (precvpriv->pallocated_recv_buf) {
		n = NR_RECVBUFF * sizeof(struct recv_buf) + 4;
		rtw_mfree(precvpriv->pallocated_recv_buf, n);
		precvpriv->pallocated_recv_buf = NULL;
	}
}

