/* * 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 MAX_TX_RATE_PHY 48 #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; u8 ctrl_rate; u8 cw40index; u8 sgi_index; u8 ht_index; } 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; struct dentry *debugfs_rcstats; struct ath_rc_stats rcstats[RATE_TABLE_SIZE]; }; #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 */