ar9170: implement transmit aggregation

	bool has_plcp;

};

#define AR9170_NUM_MAX_BA_RETRY	5

#define AR9170_NUM_TID	16

#define WME_BA_BMP_SIZE         64

#define AR9170_NUM_MAX_AGG_LEN	(2 * WME_BA_BMP_SIZE)

#define WME_AC_BE   2

#define WME_AC_BK   3

#define WME_AC_VI   1

#define WME_AC_VO   0

#define TID_TO_WME_AC(_tid)				\

	((((_tid) == 0) || ((_tid) == 3)) ? WME_AC_BE :	\

	 (((_tid) == 1) || ((_tid) == 2)) ? WME_AC_BK :	\

	 (((_tid) == 4) || ((_tid) == 5)) ? WME_AC_VI :	\

	 WME_AC_VO)

#define BAW_WITHIN(_start, _bawsz, _seqno) \

	((((_seqno) - (_start)) & 0xfff) < (_bawsz))

enum ar9170_tid_state {

	AR9170_TID_STATE_INVALID,

	AR9170_TID_STATE_SHUTDOWN,

	AR9170_TID_STATE_PROGRESS,

	AR9170_TID_STATE_COMPLETE,

};

struct ar9170_sta_tid {

	struct list_head list;

	struct sk_buff_head queue;

	u8 addr[ETH_ALEN];

	u16 ssn;

	u16 tid;

	enum ar9170_tid_state state;

	bool active;

	u8 retry;

};

#define AR9170_QUEUE_TIMEOUT		64

#define AR9170_TX_TIMEOUT		8

#define AR9170_BA_TIMEOUT		4

#define AR9170_JANITOR_DELAY		128

#define AR9170_TX_INVALID_RATE		0xffffffff

#define AR9170_NUM_TX_STATUS		128

#define AR9170_NUM_TX_AGG_MAX		30

struct ar9170 {

	struct ieee80211_hw *hw;

	struct mutex mutex;

	struct sk_buff_head tx_pending[__AR9170_NUM_TXQ];

	struct sk_buff_head tx_status[__AR9170_NUM_TXQ];

	struct delayed_work tx_janitor;

	/* tx ampdu */

	struct sk_buff_head tx_status_ampdu;

	spinlock_t tx_ampdu_list_lock;

	struct list_head tx_ampdu_list;

	unsigned int tx_ampdu_pending;

	/* rxstream mpdu merge */

	struct ar9170_rxstream_mpdu_merge rx_mpdu;

	struct sk_buff *rx_failover;

	int rx_failover_missing;

	/* (cached) HW A-MPDU settings */

	u8 global_ampdu_density;

	u8 global_ampdu_factor;

};

struct ar9170_sta_info {

	struct ar9170_sta_tid agg[AR9170_NUM_TID];

	unsigned int ampdu_max_len;

};

#define AR9170_TX_FLAG_WAIT_FOR_ACK	BIT(0)