/******************************************************************************
 *
 * 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.
 *
 ******************************************************************************/
#ifndef _RTW_RECV_H_
#define _RTW_RECV_H_

	#ifdef CONFIG_SINGLE_RECV_BUF
		#define NR_RECVBUFF (1)
	#else
		#define NR_RECVBUFF (8)
	#endif /* CONFIG_SINGLE_RECV_BUF */

	#define NR_PREALLOC_RECV_SKB (8)

#define NR_RECVFRAME 256

#define RXFRAME_ALIGN	8
#define RXFRAME_ALIGN_SZ	(1<<RXFRAME_ALIGN)

#define DRVINFO_SZ	4 /*  unit is 8bytes */

#define MAX_RXFRAME_CNT	512
#define MAX_RX_NUMBLKS		(32)
#define RECVFRAME_HDR_ALIGN 128


#define PHY_RSSI_SLID_WIN_MAX				100
#define PHY_LINKQUALITY_SLID_WIN_MAX		20


#define SNAP_SIZE sizeof(struct ieee80211_snap_hdr)

#define RX_MPDU_QUEUE				0
#define RX_CMD_QUEUE				1
#define RX_MAX_QUEUE				2

#define MAX_SUBFRAME_COUNT	64
extern u8 rtw_rfc1042_header[];
extern u8 rtw_bridge_tunnel_header[];

/* for Rx reordering buffer control */
struct recv_reorder_ctrl
{
	struct adapter	*padapter;
	u8 enable;
	u16 indicate_seq;/* wstart_b, init_value = 0xffff */
	u16 wend_b;
	u8 wsize_b;
	struct __queue pending_recvframe_queue;
	_timer reordering_ctrl_timer;
};

struct	stainfo_rxcache	{
	u16 tid_rxseq[16];
/*
	unsigned short	tid0_rxseq;
	unsigned short	tid1_rxseq;
	unsigned short	tid2_rxseq;
	unsigned short	tid3_rxseq;
	unsigned short	tid4_rxseq;
	unsigned short	tid5_rxseq;
	unsigned short	tid6_rxseq;
	unsigned short	tid7_rxseq;
	unsigned short	tid8_rxseq;
	unsigned short	tid9_rxseq;
	unsigned short	tid10_rxseq;
	unsigned short	tid11_rxseq;
	unsigned short	tid12_rxseq;
	unsigned short	tid13_rxseq;
	unsigned short	tid14_rxseq;
	unsigned short	tid15_rxseq;
*/
};


struct smooth_rssi_data {
	u32 elements[100];	/* array to store values */
	u32 index;			/* index to current array to store */
	u32 total_num;		/* num of valid elements */
	u32 total_val;		/* sum of valid elements */
};

struct signal_stat {
	u8 update_req;		/* used to indicate */
	u8 avg_val;		/* avg of valid elements */
	u32 total_num;		/* num of valid elements */
	u32 total_val;		/* sum of valid elements */
};

struct phy_info {
	u8 RxPWDBAll;

	u8 SignalQuality;	 /*  in 0-100 index. */
	s8		RxMIMOSignalQuality[4];	/* per-path's EVM */
	u8 RxMIMOEVMdbm[4];		/* per-path's EVM dbm */

	u8 RxMIMOSignalStrength[4];/*  in 0~100 index */

	u16 	Cfo_short[4];			/*  per-path's Cfo_short */
	u16 	Cfo_tail[4];			/*  per-path's Cfo_tail */

	s8		RxPower; /*  in dBm Translate from PWdB */
	s8		RecvSignalPower;/*  Real power in dBm for this packet, no beautification and aggregation. Keep this raw info to be used for the other procedures. */
	u8 BTRxRSSIPercentage;
	u8 SignalStrength; /*  in 0-100 index. */

	s8		RxPwr[4];				/* per-path's pwdb */
	u8 RxSNR[4];				/* per-path's SNR */
	u8 BandWidth;
	u8 btCoexPwrAdjust;
};

#ifdef DBG_RX_SIGNAL_DISPLAY_RAW_DATA
struct rx_raw_rssi
{
	u8 data_rate;
	u8 pwdball;
	s8 pwr_all;

	u8 mimo_singal_strength[4];/*  in 0~100 index */
	u8 mimo_singal_quality[4];

	s8 ofdm_pwr[4];
	u8 ofdm_snr[4];

};
#endif

struct rx_pkt_attrib	{
	u16 pkt_len;
	u8 physt;
	u8 drvinfo_sz;
	u8 shift_sz;
	u8 hdrlen; /* the WLAN Header Len */
	u8 to_fr_ds;
	u8 amsdu;
	u8 qos;
	u8 priority;
	u8 pw_save;
	u8 mdata;
	u16 seq_num;
	u8 frag_num;
	u8 mfrag;
	u8 order;
	u8 privacy; /* in frame_ctrl field */
	u8 bdecrypted;
	u8 encrypt; /* when 0 indicate no encrypt. when non-zero, indicate the encrypt algorith */
	u8 iv_len;
	u8 icv_len;
	u8 crc_err;
	u8 icv_err;

	u16 eth_type;

	u8 dst[ETH_ALEN];
	u8 src[ETH_ALEN];
	u8 ta[ETH_ALEN];
	u8 ra[ETH_ALEN];
	u8 bssid[ETH_ALEN];

	u8 ack_policy;

/* ifdef CONFIG_TCP_CSUM_OFFLOAD_RX */
	u8 tcpchk_valid; /*  0: invalid, 1: valid */
	u8 ip_chkrpt; /* 0: incorrect, 1: correct */
	u8 tcp_chkrpt; /* 0: incorrect, 1: correct */
/* endif */
	u8 key_index;

	u8 data_rate;
	u8 sgi;
	u8 pkt_rpt_type;
	u32 MacIDValidEntry[2];	/*  64 bits present 64 entry. */

/*
	u8 signal_qual;
	s8	rx_mimo_signal_qual[2];
	u8 signal_strength;
	u32 RxPWDBAll;
	s32	RecvSignalPower;
*/
	struct phy_info phy_info;
};


/* These definition is used for Rx packet reordering. */
#define SN_LESS(a, b)		(((a-b)&0x800)!= 0)
#define SN_EQUAL(a, b)	(a == b)
/* define REORDER_WIN_SIZE	128 */
/* define REORDER_ENTRY_NUM	128 */
#define REORDER_WAIT_TIME	(50) /*  (ms) */

#define RECVBUFF_ALIGN_SZ 8

#define RXDESC_SIZE	24
#define RXDESC_OFFSET RXDESC_SIZE

struct recv_stat {
	__le32 rxdw0;
	__le32 rxdw1;
	__le32 rxdw2;
	__le32 rxdw3;
#ifndef BUF_DESC_ARCH
	__le32 rxdw4;
	__le32 rxdw5;
#endif /* if BUF_DESC_ARCH is defined, rx_buf_desc occupy 4 double words */
};

#define EOR BIT(30)

/*
accesser of recv_priv: rtw_recv_entry(dispatch / passive level); recv_thread(passive) ; returnpkt(dispatch)
; halt(passive) ;

using enter_critical section to protect
*/
struct recv_priv {
	_lock	lock;
	struct __queue	free_recv_queue;
	struct __queue	recv_pending_queue;
	struct __queue	uc_swdec_pending_queue;
	u8 *pallocated_frame_buf;
	u8 *precv_frame_buf;
	uint free_recvframe_cnt;
	struct adapter	*adapter;
	u32 bIsAnyNonBEPkts;
	u64	rx_bytes;
	u64	rx_pkts;
	u64	rx_drop;
	uint  rx_icv_err;
	uint  rx_largepacket_crcerr;
	uint  rx_smallpacket_crcerr;
	uint  rx_middlepacket_crcerr;

	struct tasklet_struct irq_prepare_beacon_tasklet;
	struct tasklet_struct recv_tasklet;
	struct sk_buff_head free_recv_skb_queue;
	struct sk_buff_head rx_skb_queue;
#ifdef CONFIG_RX_INDICATE_QUEUE
	struct task rx_indicate_tasklet;
	struct ifqueue rx_indicate_queue;
#endif	/*  CONFIG_RX_INDICATE_QUEUE */

	u8 *pallocated_recv_buf;
	u8 *precv_buf;    /*  4 alignment */
	struct __queue	free_recv_buf_queue;
	u32 free_recv_buf_queue_cnt;

	struct __queue	recv_buf_pending_queue;

	/* For display the phy informatiom */
	u8 is_signal_dbg;	/*  for debug */
	u8 signal_strength_dbg;	/*  for debug */

	u8 signal_strength;
	u8 signal_qual;
	s8 rssi;	/* translate_percentage_to_dbm(ptarget_wlan->network.PhyInfo.SignalStrength); */
	#ifdef DBG_RX_SIGNAL_DISPLAY_RAW_DATA
	struct rx_raw_rssi raw_rssi_info;
	#endif
	/* s8 rxpwdb; */
	s16 noise;
	/* int RxSNRdB[2]; */
	/* s8 RxRssi[2]; */
	/* int FalseAlmCnt_all; */


	_timer signal_stat_timer;
	u32 signal_stat_sampling_interval;
	/* u32 signal_stat_converging_constant; */
	struct signal_stat signal_qual_data;
	struct signal_stat signal_strength_data;
};

#define rtw_set_signal_stat_timer(recvpriv) _set_timer(&(recvpriv)->signal_stat_timer, (recvpriv)->signal_stat_sampling_interval)

struct sta_recv_priv {

	_lock	lock;
	sint	option;

	/* struct __queue	blk_strms[MAX_RX_NUMBLKS]; */
	struct __queue defrag_q;	 /* keeping the fragment frame until defrag */

	struct	stainfo_rxcache rxcache;

	/* uint	sta_rx_bytes; */
	/* uint	sta_rx_pkts; */
	/* uint	sta_rx_fail; */

};


struct recv_buf
{
	struct list_head list;

	_lock recvbuf_lock;

	u32 ref_cnt;

	struct adapter * adapter;

	u8 *pbuf;
	u8 *pallocated_buf;

	u32 len;
	u8 *phead;
	u8 *pdata;
	u8 *ptail;
	u8 *pend;

	_pkt	*pskb;
	u8 reuse;
};


/*
	head  ----->

		data  ----->

			payload

		tail  ----->


	end   ----->

	len = (unsigned int)(tail - data);

*/
struct recv_frame_hdr
{
	struct list_head	list;
#ifndef CONFIG_BSD_RX_USE_MBUF
	struct sk_buff	 *pkt;
	struct sk_buff	 *pkt_newalloc;
#else /*  CONFIG_BSD_RX_USE_MBUF */
	_pkt	*pkt;
	_pkt *pkt_newalloc;
#endif /*  CONFIG_BSD_RX_USE_MBUF */

	struct adapter  *adapter;

	u8 fragcnt;

	int frame_tag;

	struct rx_pkt_attrib attrib;

	uint  len;
	u8 *rx_head;
	u8 *rx_data;
	u8 *rx_tail;
	u8 *rx_end;

	void *precvbuf;


	/*  */
	struct sta_info *psta;

	/* for A-MPDU Rx reordering buffer control */
	struct recv_reorder_ctrl *preorder_ctrl;
};


union recv_frame{
	union{
		struct list_head list;
		struct recv_frame_hdr hdr;
		uint mem[RECVFRAME_HDR_ALIGN>>2];
	}u;

	/* uint mem[MAX_RXSZ>>2]; */

};

enum RX_PACKET_TYPE {
	NORMAL_RX,/* Normal rx packet */
	TX_REPORT1,/* CCX */
	TX_REPORT2,/* TX RPT */
	HIS_REPORT,/*  USB HISR RPT */
	C2H_PACKET
};

extern union recv_frame *_rtw_alloc_recvframe (struct __queue *pfree_recv_queue);  /* get a free recv_frame from pfree_recv_queue */
extern union recv_frame *rtw_alloc_recvframe (struct __queue *pfree_recv_queue);  /* get a free recv_frame from pfree_recv_queue */
extern int	 rtw_free_recvframe(union recv_frame *precvframe, struct __queue *pfree_recv_queue);

#define rtw_dequeue_recvframe(queue) rtw_alloc_recvframe(queue)
extern int _rtw_enqueue_recvframe(union recv_frame *precvframe, struct __queue *queue);
extern int rtw_enqueue_recvframe(union recv_frame *precvframe, struct __queue *queue);

extern void rtw_free_recvframe_queue(struct __queue *pframequeue,  struct __queue *pfree_recv_queue);
u32 rtw_free_uc_swdec_pending_queue(struct adapter *adapter);

sint rtw_enqueue_recvbuf_to_head(struct recv_buf *precvbuf, struct __queue *queue);
sint rtw_enqueue_recvbuf(struct recv_buf *precvbuf, struct __queue *queue);
struct recv_buf *rtw_dequeue_recvbuf (struct __queue *queue);

void rtw_reordering_ctrl_timeout_handler(void *pcontext);

__inline static u8 *get_rxmem(union recv_frame *precvframe)
{
	/* always return rx_head... */
	if (precvframe == NULL)
		return NULL;

	return precvframe->u.hdr.rx_head;
}

__inline static u8 *get_recvframe_data(union recv_frame *precvframe)
{

	/* alwasy return rx_data */
	if (precvframe == NULL)
		return NULL;

	return precvframe->u.hdr.rx_data;

}

__inline static u8 *recvframe_pull(union recv_frame *precvframe, sint sz)
{
	/*  rx_data += sz; move rx_data sz bytes  hereafter */

	/* used for extract sz bytes from rx_data, update rx_data and return the updated rx_data to the caller */


	if (precvframe == NULL)
		return NULL;


	precvframe->u.hdr.rx_data += sz;

	if (precvframe->u.hdr.rx_data > precvframe->u.hdr.rx_tail)
	{
		precvframe->u.hdr.rx_data -= sz;
		return NULL;
	}

	precvframe->u.hdr.len -=sz;

	return precvframe->u.hdr.rx_data;

}

__inline static u8 *recvframe_put(union recv_frame *precvframe, sint sz)
{
	/*  rx_tai += sz; move rx_tail sz bytes  hereafter */

	/* used for append sz bytes from ptr to rx_tail, update rx_tail and return the updated rx_tail to the caller */
	/* after putting, rx_tail must be still larger than rx_end. */
	unsigned char * prev_rx_tail;

	if (precvframe == NULL)
		return NULL;

	prev_rx_tail = precvframe->u.hdr.rx_tail;

	precvframe->u.hdr.rx_tail += sz;

	if (precvframe->u.hdr.rx_tail > precvframe->u.hdr.rx_end)
	{
		precvframe->u.hdr.rx_tail = prev_rx_tail;
		return NULL;
	}

	precvframe->u.hdr.len +=sz;

	return precvframe->u.hdr.rx_tail;

}


__inline static u8 *recvframe_pull_tail(union recv_frame *precvframe, sint sz)
{
	/*  rmv data from rx_tail (by yitsen) */

	/* used for extract sz bytes from rx_end, update rx_end and return the updated rx_end to the caller */
	/* after pulling, rx_end must be still larger than rx_data. */

	if (precvframe == NULL)
		return NULL;

	precvframe->u.hdr.rx_tail -= sz;

	if (precvframe->u.hdr.rx_tail < precvframe->u.hdr.rx_data)
	{
		precvframe->u.hdr.rx_tail += sz;
		return NULL;
	}

	precvframe->u.hdr.len -=sz;

	return precvframe->u.hdr.rx_tail;

}

__inline static union recv_frame *rxmem_to_recvframe(u8 *rxmem)
{
	/* due to the design of 2048 bytes alignment of recv_frame, we can reference the union recv_frame */
	/* from any given member of recv_frame. */
	/*  rxmem indicates the any member/address in recv_frame */

	return (union recv_frame*)(((SIZE_PTR)rxmem >> RXFRAME_ALIGN) << RXFRAME_ALIGN);

}

__inline static sint get_recvframe_len(union recv_frame *precvframe)
{
	return precvframe->u.hdr.len;
}


__inline static s32 translate_percentage_to_dbm(u32 SignalStrengthIndex)
{
	s32	SignalPower; /*  in dBm. */

#ifdef CONFIG_SKIP_SIGNAL_SCALE_MAPPING
	/*  Translate to dBm (x =y-100) */
	SignalPower = SignalStrengthIndex - 100;
#else
	/*  Translate to dBm (x = 0.5y-95). */
	SignalPower = (s32)((SignalStrengthIndex + 1) >> 1);
	SignalPower -= 95;
#endif

	return SignalPower;
}


struct sta_info;

extern void _rtw_init_sta_recv_priv(struct sta_recv_priv *psta_recvpriv);

extern void  mgt_dispatcher(struct adapter *padapter, union recv_frame *precv_frame);

#endif