| /* |
| * Copyright (c) 2004 Sam Leffler, Errno Consulting |
| * Copyright (c) 2004 Video54 Technologies, Inc. |
| * Copyright (c) 2008-2009 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 |
| |
| struct ath_softc; |
| |
| #define ATH_RATE_MAX 30 |
| #define RATE_TABLE_SIZE 64 |
| #define MAX_TX_RATE_PHY 48 |
| #define WLAN_CTRL_FRAME_SIZE (2+2+6+4) |
| |
| /* 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) |
| |
| 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_40_SS, |
| WLAN_RC_PHY_HT_40_DS, |
| WLAN_RC_PHY_HT_20_SS_HGI, |
| WLAN_RC_PHY_HT_20_DS_HGI, |
| WLAN_RC_PHY_HT_40_SS_HGI, |
| WLAN_RC_PHY_HT_40_DS_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_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; |
| 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; |
| } 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; |
| }; |
| |
| enum ath9k_internal_frame_type { |
| ATH9K_NOT_INTERNAL, |
| ATH9K_INT_PAUSE, |
| ATH9K_INT_UNPAUSE |
| }; |
| |
| struct ath_tx_info_priv { |
| struct ath_wiphy *aphy; |
| struct ath_tx_status tx; |
| int n_frames; |
| int n_bad_frames; |
| bool update_rc; |
| enum ath9k_internal_frame_type frame_type; |
| }; |
| |
| #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 */ |