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Commit 9b9c5aae authored by Christian Lamparter's avatar Christian Lamparter Committed by John W. Linville
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ar9170: xmit code revamp 



This patch is a back-port from aggregation testing code.

In the past, we didn't limit the amount of active tx urbs.
However, ar9170 only has a limited buffer reserved for
pending data frames.

This wasn't much of a problem with the slower 802.11b/g.
We simply stopped the full queue and moved on to something different
in the mean time. But - as you guessed it -  this simple approach
stands in way for a decent aggregation implementation.

Signed-off-by: default avatarChristian Lamparter <chunkeey@web.de>
Signed-off-by: default avatarJohn W. Linville <linville@tuxdriver.com>
parent 2543a0c4

drivers/net/wireless/ath/ar9170/ar9170.h

+24 −10
Original line number Diff line number Diff line
@@ -109,6 +109,11 @@ struct ar9170_rxstream_mpdu_merge { 
	bool has_plcp;

};



#define AR9170_QUEUE_TIMEOUT		64

#define AR9170_TX_TIMEOUT		8

#define AR9170_JANITOR_DELAY		128

#define AR9170_TX_INVALID_RATE		0xffffffff



struct ar9170 {

	struct ieee80211_hw *hw;

	struct mutex mutex;
@@ -117,10 +122,11 @@ struct ar9170 { 


	int (*open)(struct ar9170 *);

	void (*stop)(struct ar9170 *);

	int (*tx)(struct ar9170 *, struct sk_buff *, bool, unsigned int);

	int (*tx)(struct ar9170 *, struct sk_buff *);

	int (*exec_cmd)(struct ar9170 *, enum ar9170_cmd, u32 ,

			void *, u32 , void *);

	void (*callback_cmd)(struct ar9170 *, u32 , void *);

	int (*flush)(struct ar9170 *);



	/* interface mode settings */

	struct ieee80211_vif *vif;
@@ -177,10 +183,10 @@ struct ar9170 { 
	struct ar9170_eeprom eeprom;

	struct ath_regulatory regulatory;



	/* global tx status for unregistered Stations. */

	struct sk_buff_head global_tx_status;

	struct sk_buff_head global_tx_status_waste;

	struct delayed_work tx_status_janitor;

	/* tx queues - as seen by hw - */

	struct sk_buff_head tx_pending[__AR9170_NUM_TXQ];

	struct sk_buff_head tx_status[__AR9170_NUM_TXQ];

	struct delayed_work tx_janitor;



	/* rxstream mpdu merge */

	struct ar9170_rxstream_mpdu_merge rx_mpdu;
@@ -189,11 +195,19 @@ struct ar9170 { 
};



struct ar9170_sta_info {

	struct sk_buff_head tx_status[__AR9170_NUM_TXQ];

};



#define IS_STARTED(a)		(a->state >= AR9170_STARTED)

#define IS_ACCEPTING_CMD(a)	(a->state >= AR9170_IDLE)

#define AR9170_TX_FLAG_WAIT_FOR_ACK	BIT(0)

#define AR9170_TX_FLAG_NO_ACK		BIT(1)

#define AR9170_TX_FLAG_BLOCK_ACK	BIT(2)



struct ar9170_tx_info {

	unsigned long timeout;

	unsigned int flags;

};



#define IS_STARTED(a)		(((struct ar9170 *)a)->state >= AR9170_STARTED)

#define IS_ACCEPTING_CMD(a)	(((struct ar9170 *)a)->state >= AR9170_IDLE)



#define AR9170_FILTER_CHANGED_MODE		BIT(0)

#define AR9170_FILTER_CHANGED_MULTICAST		BIT(1)
@@ -204,9 +218,9 @@ void *ar9170_alloc(size_t priv_size); 
int ar9170_register(struct ar9170 *ar, struct device *pdev);

void ar9170_rx(struct ar9170 *ar, struct sk_buff *skb);

void ar9170_unregister(struct ar9170 *ar);

void ar9170_handle_tx_status(struct ar9170 *ar, struct sk_buff *skb,

			     bool update_statistics, u16 tx_status);

void ar9170_tx_callback(struct ar9170 *ar, struct sk_buff *skb);

void ar9170_handle_command_response(struct ar9170 *ar, void *buf, u32 len);

int ar9170_nag_limiter(struct ar9170 *ar);



/* MAC */

int ar9170_op_tx(struct ieee80211_hw *hw, struct sk_buff *skb);

drivers/net/wireless/ath/ar9170/hw.h

+3 −0
Original line number Diff line number Diff line
@@ -420,4 +420,7 @@ enum ar9170_txq { 
	__AR9170_NUM_TXQ,

};



#define AR9170_TXQ_DEPTH	32

#define AR9170_TX_MAX_PENDING	128



#endif /* __AR9170_HW_H */