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/*
* 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(CONFIG_MAC80211_DEBUGFS) && defined(CONFIG_ATH9K_DEBUGFS)
struct dentry *debugfs_rcstats;
struct ath_rc_stats rcstats[RATE_TABLE_SIZE];
#endif
};
#if defined(CONFIG_MAC80211_DEBUGFS) && defined(CONFIG_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 CONFIG_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 */
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