diff options
Diffstat (limited to 'drivers/net/wireless/ath/ath9k/rc.h')
| -rw-r--r-- | drivers/net/wireless/ath/ath9k/rc.h | 248 |
1 files changed, 248 insertions, 0 deletions
diff --git a/drivers/net/wireless/ath/ath9k/rc.h b/drivers/net/wireless/ath/ath9k/rc.h new file mode 100644 index 0000000..8b87893 --- /dev/null +++ b/drivers/net/wireless/ath/ath9k/rc.h @@ -0,0 +1,248 @@ +/* + * 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 */ |