/* * Copyright (c) 2004 Sam Leffler, Errno Consulting * Copyright (c) 2004 Video54 Technologies, Inc. * Copyright (c) 2008 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 "ath9k.h" struct ath_softc; #define ATH_RATE_MAX 30 #define RATE_TABLE_SIZE 64 #define MAX_TX_RATE_PHY 48 /* VALID_ALL - valid for 20/40/Legacy, * VALID - Legacy only, * VALID_20 - HT 20 only, * VALID_40 - HT 40 only */ #define INVALID 0x0 #define VALID 0x1 #define VALID_20 0x2 #define VALID_40 0x4 #define VALID_2040 (VALID_20|VALID_40) #define VALID_ALL (VALID_2040|VALID) #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_40(_phy) ((_phy == WLAN_RC_PHY_HT_40_SS) \ || (_phy == WLAN_RC_PHY_HT_40_DS) \ || (_phy == WLAN_RC_PHY_HT_40_SS_HGI) \ || (_phy == WLAN_RC_PHY_HT_40_DS_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_40_SS_HGI) \ || (_phy == WLAN_RC_PHY_HT_40_DS_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) ? VALID_40 : VALID_20 : VALID)) /* 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 & VALID_20) && !(capflag & WLAN_RC_40_FLAG)) || \ ((flag & VALID_40) && (capflag & WLAN_RC_40_FLAG))) #define WLAN_RC_DS_FLAG (0x01) #define WLAN_RC_40_FLAG (0x02) #define WLAN_RC_SGI_FLAG (0x04) #define WLAN_RC_HT_FLAG (0x08) /** * struct ath_rate_table - Rate Control table * @valid: valid for use in rate control * @valid_single_stream: valid for use in rate control for * single stream operation * @phy: CCK/OFDM * @ratekbps: rate in Kbits per second * @user_ratekbps: user rate in Kbits per second * @ratecode: rate that goes into HW descriptors * @short_preamble: Mask for enabling short preamble in ratecode for CCK * @dot11rate: value that goes into supported * rates info element of MLME * @ctrl_rate: Index of next lower basic rate, used for duration computation * @max_4ms_framelen: maximum frame length(bytes) for tx duration * @probe_interval: interval for rate control to probe for other rates * @rssi_reduce_interval: interval for rate control to reduce rssi * @initial_ratemax: initial ratemax value */ struct ath_rate_table { int rate_cnt; u8 rateCodeToIndex[256]; struct { int valid; int valid_single_stream; u8 phy; u32 ratekbps; u32 user_ratekbps; u8 ratecode; u8 short_preamble; u8 dot11rate; u8 ctrl_rate; int8_t rssi_ack_validmin; int8_t rssi_ack_deltamin; u8 base_index; u8 cw40index; u8 sgi_index; u8 ht_index; u32 max_4ms_framelen; u16 lpAckDuration; u16 spAckDuration; } info[RATE_TABLE_SIZE]; u32 probe_interval; u32 rssi_reduce_interval; u8 initial_ratemax; }; struct ath_tx_ratectrl_state { int8_t rssi_thres; /* required rssi for this rate (dB) */ u8 per; /* recent estimate of packet error rate (%) */ }; struct ath_rateset { u8 rs_nrates; u8 rs_rates[ATH_RATE_MAX]; }; /** * struct ath_rate_priv - Rate Control priv data * @state: RC state * @rssi_last: last ACK rssi * @rssi_last_lookup: last ACK rssi used for lookup * @rssi_last_prev: previous last ACK rssi * @rssi_last_prev2: 2nd previous last ACK rssi * @rssi_sum_cnt: count of rssi_sum for averaging * @rssi_sum_rate: rate that we are averaging * @rssi_sum: running sum of rssi for averaging * @probe_rate: rate we are probing at * @rssi_time: msec timestamp for last ack rssi * @rssi_down_time: msec timestamp for last down step * @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 * @probe_interval: interval for ratectrl to probe for other rates * @prev_data_rix: rate idx of last data frame * @ht_cap: HT capabilities * @single_stream: When TRUE, only single TX stream possible * @neg_rates: Negotatied rates * @neg_ht_rates: Negotiated HT rates */ struct ath_rate_priv { int8_t rssi_last; int8_t rssi_last_lookup; int8_t rssi_last_prev; int8_t rssi_last_prev2; int32_t rssi_sum_cnt; int32_t rssi_sum_rate; int32_t rssi_sum; 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 single_stream; u8 valid_phy_ratecnt[WLAN_RC_PHY_MAX]; u8 valid_phy_rateidx[WLAN_RC_PHY_MAX][RATE_TABLE_SIZE]; u8 rc_phy_mode; u8 rate_max_phy; u32 rssi_time; u32 rssi_down_time; u32 probe_time; u32 per_down_time; u32 probe_interval; u32 prev_data_rix; u32 tx_triglevel_max; struct ath_tx_ratectrl_state state[RATE_TABLE_SIZE]; struct ath_rateset neg_rates; struct ath_rateset neg_ht_rates; struct ath_rate_softc *asc; }; struct ath_tx_info_priv { struct ath_tx_status tx; int n_frames; int n_bad_frames; bool update_rc; }; #define ATH_TX_INFO_PRIV(tx_info) \ ((struct ath_tx_info_priv *)((tx_info)->rate_driver_data[0])) void ath_rate_attach(struct ath_softc *sc); u8 ath_rate_findrateix(struct ath_softc *sc, u8 dot11_rate); int ath_rate_control_register(void); void ath_rate_control_unregister(void); #endif /* RC_H */