drivers/net/wireless/ath/ath9k/rc.h - nest-cam/v366/kernel_backports - Git at Google

 /*
  * Copyright (c) 2004 Sam Leffler, Errno Consulting
  * Copyright (c) 2004 Video54 Technologies, Inc.
  * Copyright (c) 2008-2011 Atheros Communications Inc.
  *
  * Permission to use, copy, modify, and/or distribute this software for any
  * purpose with or without fee is hereby granted, provided that the above
  * copyright notice and this permission notice appear in all copies.
  *
  * THE SOFTWARE IS PROVIDED "AS IS" AND THE AUTHOR DISCLAIMS ALL WARRANTIES
  * WITH REGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED WARRANTIES OF
  * MERCHANTABILITY AND FITNESS. IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR
  * ANY SPECIAL, DIRECT, INDIRECT, OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES
  * WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR PROFITS, WHETHER IN AN
  * ACTION OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION, ARISING OUT OF
  * OR IN CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE.
  */

 #ifndef RC_H
 #define RC_H

 #include "hw.h"

 struct ath_softc;

 #define ATH_RATE_MAX     30
 #define RATE_TABLE_SIZE  72

 #define RC_INVALID	0x0000
 #define RC_LEGACY	0x0001
 #define RC_SS		0x0002
 #define RC_DS		0x0004
 #define RC_TS		0x0008
 #define RC_HT_20	0x0010
 #define RC_HT_40	0x0020

 #define RC_STREAM_MASK	0xe
 #define RC_DS_OR_LATER(f)	((((f) & RC_STREAM_MASK) == RC_DS) || \
 				(((f) & RC_STREAM_MASK) == (RC_DS | RC_TS)))
 #define RC_TS_ONLY(f)		(((f) & RC_STREAM_MASK) == RC_TS)
 #define RC_SS_OR_LEGACY(f)	((f) & (RC_SS | RC_LEGACY))

 #define RC_HT_2040		(RC_HT_20 | RC_HT_40)
 #define RC_ALL_STREAM		(RC_SS | RC_DS | RC_TS)
 #define RC_L_SD			(RC_LEGACY | RC_SS | RC_DS)
 #define RC_L_SDT		(RC_LEGACY | RC_SS | RC_DS | RC_TS)
 #define RC_HT_S_20		(RC_HT_20 | RC_SS)
 #define RC_HT_D_20		(RC_HT_20 | RC_DS)
 #define RC_HT_T_20		(RC_HT_20 | RC_TS)
 #define RC_HT_S_40		(RC_HT_40 | RC_SS)
 #define RC_HT_D_40		(RC_HT_40 | RC_DS)
 #define RC_HT_T_40		(RC_HT_40 | RC_TS)

 #define RC_HT_SD_20		(RC_HT_20 | RC_SS | RC_DS)
 #define RC_HT_DT_20		(RC_HT_20 | RC_DS | RC_TS)
 #define RC_HT_SD_40		(RC_HT_40 | RC_SS | RC_DS)
 #define RC_HT_DT_40		(RC_HT_40 | RC_DS | RC_TS)

 #define RC_HT_SD_2040		(RC_HT_2040 | RC_SS | RC_DS)
 #define RC_HT_SDT_2040		(RC_HT_2040 | RC_SS | RC_DS | RC_TS)

 #define RC_HT_SDT_20		(RC_HT_20 | RC_SS | RC_DS | RC_TS)
 #define RC_HT_SDT_40		(RC_HT_40 | RC_SS | RC_DS | RC_TS)

 #define RC_ALL			(RC_LEGACY | RC_HT_2040 | RC_ALL_STREAM)

 enum {
 	WLAN_RC_PHY_OFDM,
 	WLAN_RC_PHY_CCK,
 	WLAN_RC_PHY_HT_20_SS,
 	WLAN_RC_PHY_HT_20_DS,
 	WLAN_RC_PHY_HT_20_TS,
 	WLAN_RC_PHY_HT_40_SS,
 	WLAN_RC_PHY_HT_40_DS,
 	WLAN_RC_PHY_HT_40_TS,
 	WLAN_RC_PHY_HT_20_SS_HGI,
 	WLAN_RC_PHY_HT_20_DS_HGI,
 	WLAN_RC_PHY_HT_20_TS_HGI,
 	WLAN_RC_PHY_HT_40_SS_HGI,
 	WLAN_RC_PHY_HT_40_DS_HGI,
 	WLAN_RC_PHY_HT_40_TS_HGI,
 	WLAN_RC_PHY_MAX
 };

 #define WLAN_RC_PHY_DS(_phy)   ((_phy == WLAN_RC_PHY_HT_20_DS)		\
 				|| (_phy == WLAN_RC_PHY_HT_40_DS)	\
 				|| (_phy == WLAN_RC_PHY_HT_20_DS_HGI)	\
 				|| (_phy == WLAN_RC_PHY_HT_40_DS_HGI))
 #define WLAN_RC_PHY_TS(_phy)   ((_phy == WLAN_RC_PHY_HT_20_TS)		\
 				|| (_phy == WLAN_RC_PHY_HT_40_TS)	\
 				|| (_phy == WLAN_RC_PHY_HT_20_TS_HGI)	\
 				|| (_phy == WLAN_RC_PHY_HT_40_TS_HGI))
 #define WLAN_RC_PHY_20(_phy)   ((_phy == WLAN_RC_PHY_HT_20_SS)		\
 				|| (_phy == WLAN_RC_PHY_HT_20_DS)	\
 				|| (_phy == WLAN_RC_PHY_HT_20_TS)	\
 				|| (_phy == WLAN_RC_PHY_HT_20_SS_HGI)	\
 				|| (_phy == WLAN_RC_PHY_HT_20_DS_HGI)	\
 				|| (_phy == WLAN_RC_PHY_HT_20_TS_HGI))
 #define WLAN_RC_PHY_40(_phy)   ((_phy == WLAN_RC_PHY_HT_40_SS)		\
 				|| (_phy == WLAN_RC_PHY_HT_40_DS)	\
 				|| (_phy == WLAN_RC_PHY_HT_40_TS)	\
 				|| (_phy == WLAN_RC_PHY_HT_40_SS_HGI)	\
 				|| (_phy == WLAN_RC_PHY_HT_40_DS_HGI)	\
 				|| (_phy == WLAN_RC_PHY_HT_40_TS_HGI))
 #define WLAN_RC_PHY_SGI(_phy)  ((_phy == WLAN_RC_PHY_HT_20_SS_HGI)      \
 				|| (_phy == WLAN_RC_PHY_HT_20_DS_HGI)   \
 				|| (_phy == WLAN_RC_PHY_HT_20_TS_HGI)   \
 				|| (_phy == WLAN_RC_PHY_HT_40_SS_HGI)   \
 				|| (_phy == WLAN_RC_PHY_HT_40_DS_HGI)   \
 				|| (_phy == WLAN_RC_PHY_HT_40_TS_HGI))

 #define WLAN_RC_PHY_HT(_phy)    (_phy >= WLAN_RC_PHY_HT_20_SS)

 #define WLAN_RC_CAP_MODE(capflag) (((capflag & WLAN_RC_HT_FLAG) ?	\
 	((capflag & WLAN_RC_40_FLAG) ? RC_HT_40 : RC_HT_20) : RC_LEGACY))

 #define WLAN_RC_CAP_STREAM(capflag) (((capflag & WLAN_RC_TS_FLAG) ?	\
 	(RC_TS) : ((capflag & WLAN_RC_DS_FLAG) ? RC_DS : RC_SS)))

 /* Return TRUE if flag supports HT20 && client supports HT20 or
  * return TRUE if flag supports HT40 && client supports HT40.
  * This is used becos some rates overlap between HT20/HT40.
  */
 #define WLAN_RC_PHY_HT_VALID(flag, capflag)			\
 	(((flag & RC_HT_20) && !(capflag & WLAN_RC_40_FLAG)) || \
 	 ((flag & RC_HT_40) && (capflag & WLAN_RC_40_FLAG)))

 #define WLAN_RC_DS_FLAG         (0x01)
 #define WLAN_RC_TS_FLAG         (0x02)
 #define WLAN_RC_40_FLAG         (0x04)
 #define WLAN_RC_SGI_FLAG        (0x08)
 #define WLAN_RC_HT_FLAG         (0x10)

 /**
  * struct ath_rate_table - Rate Control table
  * @rate_cnt: total number of rates for the given wireless mode
  * @mcs_start: MCS rate index offset
  * @rate_flags: Rate Control flags
  * @phy: CCK/OFDM/HT20/HT40
  * @ratekbps: rate in Kbits per second
  * @user_ratekbps: user rate in Kbits per second
  * @ratecode: rate that goes into HW descriptors
  * @dot11rate: value that goes into supported
  * 	rates info element of MLME
  * @ctrl_rate: Index of next lower basic rate, used for duration computation
  * @cw40index: Index of rates having 40MHz channel width
  * @sgi_index: Index of rates having Short Guard Interval
  * @ht_index: high throughput rates having 40MHz channel width and
  * 	Short Guard Interval
  * @probe_interval: interval for rate control to probe for other rates
  * @initial_ratemax: initial ratemax value
  */
 struct ath_rate_table {
 	int rate_cnt;
 	int mcs_start;
 	struct {
 		u16 rate_flags;
 		u8 phy;
 		u32 ratekbps;
 		u32 user_ratekbps;
 		u8 ratecode;
 		u8 dot11rate;
 	} info[RATE_TABLE_SIZE];
 	u32 probe_interval;
 	u8 initial_ratemax;
 };

 struct ath_rateset {
 	u8 rs_nrates;
 	u8 rs_rates[ATH_RATE_MAX];
 };

 struct ath_rc_stats {
 	u32 success;
 	u32 retries;
 	u32 xretries;
 	u8 per;
 };

 /**
  * struct ath_rate_priv - Rate Control priv data
  * @state: RC state
  * @probe_rate: rate we are probing at
  * @probe_time: msec timestamp for last probe
  * @hw_maxretry_pktcnt: num of packets since we got HW max retry error
  * @max_valid_rate: maximum number of valid rate
  * @per_down_time: msec timestamp for last PER down step
  * @valid_phy_ratecnt: valid rate count
  * @rate_max_phy: phy index for the max rate
  * @per: PER for every valid rate in %
  * @probe_interval: interval for ratectrl to probe for other rates
  * @ht_cap: HT capabilities
  * @neg_rates: Negotatied rates
  * @neg_ht_rates: Negotiated HT rates
  */
 struct ath_rate_priv {
 	u8 rate_table_size;
 	u8 probe_rate;
 	u8 hw_maxretry_pktcnt;
 	u8 max_valid_rate;
 	u8 valid_rate_index[RATE_TABLE_SIZE];
 	u8 ht_cap;
 	u8 valid_phy_ratecnt[WLAN_RC_PHY_MAX];
 	u8 valid_phy_rateidx[WLAN_RC_PHY_MAX][RATE_TABLE_SIZE];
 	u8 rate_max_phy;
 	u8 per[RATE_TABLE_SIZE];
 	u32 probe_time;
 	u32 per_down_time;
 	u32 probe_interval;
 	struct ath_rateset neg_rates;
 	struct ath_rateset neg_ht_rates;
 	const struct ath_rate_table *rate_table;

 #if defined(CPTCFG_MAC80211_DEBUGFS) && defined(CPTCFG_ATH9K_DEBUGFS)
 	struct dentry *debugfs_rcstats;
 	struct ath_rc_stats rcstats[RATE_TABLE_SIZE];
 #endif
 };

 #if defined(CPTCFG_MAC80211_DEBUGFS) && defined(CPTCFG_ATH9K_DEBUGFS)
 void ath_debug_stat_rc(struct ath_rate_priv *rc, int final_rate);
 void ath_debug_stat_retries(struct ath_rate_priv *rc, int rix,
 			    int xretries, int retries, u8 per);
 #else
 static inline void ath_debug_stat_rc(struct ath_rate_priv *rc, int final_rate)
 {
 }
 static inline void ath_debug_stat_retries(struct ath_rate_priv *rc, int rix,
 					  int xretries, int retries, u8 per)
 {
 }
 #endif

 #ifdef CPTCFG_ATH9K_LEGACY_RATE_CONTROL
 int ath_rate_control_register(void);
 void ath_rate_control_unregister(void);
 #else
 static inline int ath_rate_control_register(void)
 {
 	return 0;
 }

 static inline void ath_rate_control_unregister(void)
 {
 }
 #endif

 #endif /* RC_H */
	/*
	* Copyright (c) 2004 Sam Leffler, Errno Consulting
	* Copyright (c) 2004 Video54 Technologies, Inc.
	* Copyright (c) 2008-2011 Atheros Communications Inc.
	*
	* Permission to use, copy, modify, and/or distribute this software for any
	* purpose with or without fee is hereby granted, provided that the above
	* copyright notice and this permission notice appear in all copies.
	*
	* THE SOFTWARE IS PROVIDED "AS IS" AND THE AUTHOR DISCLAIMS ALL WARRANTIES
	* WITH REGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED WARRANTIES OF
	* MERCHANTABILITY AND FITNESS. IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR
	* ANY SPECIAL, DIRECT, INDIRECT, OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES
	* WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR PROFITS, WHETHER IN AN
	* ACTION OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION, ARISING OUT OF
	* OR IN CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE.
	*/

	#ifndef RC_H
	#define RC_H

	#include "hw.h"

	struct ath_softc;

	#define ATH_RATE_MAX 30
	#define RATE_TABLE_SIZE 72

	#define RC_INVALID 0x0000
	#define RC_LEGACY 0x0001
	#define RC_SS 0x0002
	#define RC_DS 0x0004
	#define RC_TS 0x0008
	#define RC_HT_20 0x0010
	#define RC_HT_40 0x0020

	#define RC_STREAM_MASK 0xe
	#define RC_DS_OR_LATER(f) ((((f) & RC_STREAM_MASK) == RC_DS) \|\| \
	(((f) & RC_STREAM_MASK) == (RC_DS \| RC_TS)))
	#define RC_TS_ONLY(f) (((f) & RC_STREAM_MASK) == RC_TS)
	#define RC_SS_OR_LEGACY(f) ((f) & (RC_SS \| RC_LEGACY))

	#define RC_HT_2040 (RC_HT_20 \| RC_HT_40)
	#define RC_ALL_STREAM (RC_SS \| RC_DS \| RC_TS)
	#define RC_L_SD (RC_LEGACY \| RC_SS \| RC_DS)
	#define RC_L_SDT (RC_LEGACY \| RC_SS \| RC_DS \| RC_TS)
	#define RC_HT_S_20 (RC_HT_20 \| RC_SS)
	#define RC_HT_D_20 (RC_HT_20 \| RC_DS)
	#define RC_HT_T_20 (RC_HT_20 \| RC_TS)
	#define RC_HT_S_40 (RC_HT_40 \| RC_SS)
	#define RC_HT_D_40 (RC_HT_40 \| RC_DS)
	#define RC_HT_T_40 (RC_HT_40 \| RC_TS)

	#define RC_HT_SD_20 (RC_HT_20 \| RC_SS \| RC_DS)
	#define RC_HT_DT_20 (RC_HT_20 \| RC_DS \| RC_TS)
	#define RC_HT_SD_40 (RC_HT_40 \| RC_SS \| RC_DS)
	#define RC_HT_DT_40 (RC_HT_40 \| RC_DS \| RC_TS)

	#define RC_HT_SD_2040 (RC_HT_2040 \| RC_SS \| RC_DS)
	#define RC_HT_SDT_2040 (RC_HT_2040 \| RC_SS \| RC_DS \| RC_TS)

	#define RC_HT_SDT_20 (RC_HT_20 \| RC_SS \| RC_DS \| RC_TS)
	#define RC_HT_SDT_40 (RC_HT_40 \| RC_SS \| RC_DS \| RC_TS)

	#define RC_ALL (RC_LEGACY \| RC_HT_2040 \| RC_ALL_STREAM)

	enum {
	WLAN_RC_PHY_OFDM,
	WLAN_RC_PHY_CCK,
	WLAN_RC_PHY_HT_20_SS,
	WLAN_RC_PHY_HT_20_DS,
	WLAN_RC_PHY_HT_20_TS,
	WLAN_RC_PHY_HT_40_SS,
	WLAN_RC_PHY_HT_40_DS,
	WLAN_RC_PHY_HT_40_TS,
	WLAN_RC_PHY_HT_20_SS_HGI,
	WLAN_RC_PHY_HT_20_DS_HGI,
	WLAN_RC_PHY_HT_20_TS_HGI,
	WLAN_RC_PHY_HT_40_SS_HGI,
	WLAN_RC_PHY_HT_40_DS_HGI,
	WLAN_RC_PHY_HT_40_TS_HGI,
	WLAN_RC_PHY_MAX
	};

	#define WLAN_RC_PHY_DS(_phy) ((_phy == WLAN_RC_PHY_HT_20_DS) \
	\|\| (_phy == WLAN_RC_PHY_HT_40_DS) \
	\|\| (_phy == WLAN_RC_PHY_HT_20_DS_HGI) \
	\|\| (_phy == WLAN_RC_PHY_HT_40_DS_HGI))
	#define WLAN_RC_PHY_TS(_phy) ((_phy == WLAN_RC_PHY_HT_20_TS) \
	\|\| (_phy == WLAN_RC_PHY_HT_40_TS) \
	\|\| (_phy == WLAN_RC_PHY_HT_20_TS_HGI) \
	\|\| (_phy == WLAN_RC_PHY_HT_40_TS_HGI))
	#define WLAN_RC_PHY_20(_phy) ((_phy == WLAN_RC_PHY_HT_20_SS) \
	\|\| (_phy == WLAN_RC_PHY_HT_20_DS) \
	\|\| (_phy == WLAN_RC_PHY_HT_20_TS) \
	\|\| (_phy == WLAN_RC_PHY_HT_20_SS_HGI) \
	\|\| (_phy == WLAN_RC_PHY_HT_20_DS_HGI) \
	\|\| (_phy == WLAN_RC_PHY_HT_20_TS_HGI))
	#define WLAN_RC_PHY_40(_phy) ((_phy == WLAN_RC_PHY_HT_40_SS) \
	\|\| (_phy == WLAN_RC_PHY_HT_40_DS) \
	\|\| (_phy == WLAN_RC_PHY_HT_40_TS) \
	\|\| (_phy == WLAN_RC_PHY_HT_40_SS_HGI) \
	\|\| (_phy == WLAN_RC_PHY_HT_40_DS_HGI) \
	\|\| (_phy == WLAN_RC_PHY_HT_40_TS_HGI))
	#define WLAN_RC_PHY_SGI(_phy) ((_phy == WLAN_RC_PHY_HT_20_SS_HGI) \
	\|\| (_phy == WLAN_RC_PHY_HT_20_DS_HGI) \
	\|\| (_phy == WLAN_RC_PHY_HT_20_TS_HGI) \
	\|\| (_phy == WLAN_RC_PHY_HT_40_SS_HGI) \
	\|\| (_phy == WLAN_RC_PHY_HT_40_DS_HGI) \
	\|\| (_phy == WLAN_RC_PHY_HT_40_TS_HGI))

	#define WLAN_RC_PHY_HT(_phy) (_phy >= WLAN_RC_PHY_HT_20_SS)

	#define WLAN_RC_CAP_MODE(capflag) (((capflag & WLAN_RC_HT_FLAG) ? \
	((capflag & WLAN_RC_40_FLAG) ? RC_HT_40 : RC_HT_20) : RC_LEGACY))

	#define WLAN_RC_CAP_STREAM(capflag) (((capflag & WLAN_RC_TS_FLAG) ? \
	(RC_TS) : ((capflag & WLAN_RC_DS_FLAG) ? RC_DS : RC_SS)))

	/* Return TRUE if flag supports HT20 && client supports HT20 or
	* return TRUE if flag supports HT40 && client supports HT40.
	* This is used becos some rates overlap between HT20/HT40.
	*/
	#define WLAN_RC_PHY_HT_VALID(flag, capflag) \
	(((flag & RC_HT_20) && !(capflag & WLAN_RC_40_FLAG)) \|\| \
	((flag & RC_HT_40) && (capflag & WLAN_RC_40_FLAG)))

	#define WLAN_RC_DS_FLAG (0x01)
	#define WLAN_RC_TS_FLAG (0x02)
	#define WLAN_RC_40_FLAG (0x04)
	#define WLAN_RC_SGI_FLAG (0x08)
	#define WLAN_RC_HT_FLAG (0x10)

	/**
	* struct ath_rate_table - Rate Control table
	* @rate_cnt: total number of rates for the given wireless mode
	* @mcs_start: MCS rate index offset
	* @rate_flags: Rate Control flags
	* @phy: CCK/OFDM/HT20/HT40
	* @ratekbps: rate in Kbits per second
	* @user_ratekbps: user rate in Kbits per second
	* @ratecode: rate that goes into HW descriptors
	* @dot11rate: value that goes into supported
	* rates info element of MLME
	* @ctrl_rate: Index of next lower basic rate, used for duration computation
	* @cw40index: Index of rates having 40MHz channel width
	* @sgi_index: Index of rates having Short Guard Interval
	* @ht_index: high throughput rates having 40MHz channel width and
	* Short Guard Interval
	* @probe_interval: interval for rate control to probe for other rates
	* @initial_ratemax: initial ratemax value
	*/
	struct ath_rate_table {
	int rate_cnt;
	int mcs_start;
	struct {
	u16 rate_flags;
	u8 phy;
	u32 ratekbps;
	u32 user_ratekbps;
	u8 ratecode;
	u8 dot11rate;
	} info[RATE_TABLE_SIZE];
	u32 probe_interval;
	u8 initial_ratemax;
	};

	struct ath_rateset {
	u8 rs_nrates;
	u8 rs_rates[ATH_RATE_MAX];
	};

	struct ath_rc_stats {
	u32 success;
	u32 retries;
	u32 xretries;
	u8 per;
	};

	/**
	* struct ath_rate_priv - Rate Control priv data
	* @state: RC state
	* @probe_rate: rate we are probing at
	* @probe_time: msec timestamp for last probe
	* @hw_maxretry_pktcnt: num of packets since we got HW max retry error
	* @max_valid_rate: maximum number of valid rate
	* @per_down_time: msec timestamp for last PER down step
	* @valid_phy_ratecnt: valid rate count
	* @rate_max_phy: phy index for the max rate
	* @per: PER for every valid rate in %
	* @probe_interval: interval for ratectrl to probe for other rates
	* @ht_cap: HT capabilities
	* @neg_rates: Negotatied rates
	* @neg_ht_rates: Negotiated HT rates
	*/
	struct ath_rate_priv {
	u8 rate_table_size;
	u8 probe_rate;
	u8 hw_maxretry_pktcnt;
	u8 max_valid_rate;
	u8 valid_rate_index[RATE_TABLE_SIZE];
	u8 ht_cap;
	u8 valid_phy_ratecnt[WLAN_RC_PHY_MAX];
	u8 valid_phy_rateidx[WLAN_RC_PHY_MAX][RATE_TABLE_SIZE];
	u8 rate_max_phy;
	u8 per[RATE_TABLE_SIZE];
	u32 probe_time;
	u32 per_down_time;
	u32 probe_interval;
	struct ath_rateset neg_rates;
	struct ath_rateset neg_ht_rates;
	const struct ath_rate_table *rate_table;

	#if defined(CPTCFG_MAC80211_DEBUGFS) && defined(CPTCFG_ATH9K_DEBUGFS)
	struct dentry *debugfs_rcstats;
	struct ath_rc_stats rcstats[RATE_TABLE_SIZE];
	#endif
	};

	#if defined(CPTCFG_MAC80211_DEBUGFS) && defined(CPTCFG_ATH9K_DEBUGFS)
	void ath_debug_stat_rc(struct ath_rate_priv *rc, int final_rate);
	void ath_debug_stat_retries(struct ath_rate_priv *rc, int rix,
	int xretries, int retries, u8 per);
	#else
	static inline void ath_debug_stat_rc(struct ath_rate_priv *rc, int final_rate)
	{
	}
	static inline void ath_debug_stat_retries(struct ath_rate_priv *rc, int rix,
	int xretries, int retries, u8 per)
	{
	}
	#endif

	#ifdef CPTCFG_ATH9K_LEGACY_RATE_CONTROL
	int ath_rate_control_register(void);
	void ath_rate_control_unregister(void);
	#else
	static inline int ath_rate_control_register(void)
	{
	return 0;
	}

	static inline void ath_rate_control_unregister(void)
	{
	}
	#endif

	#endif /* RC_H */