192 lines
5.7 KiB
C
192 lines
5.7 KiB
C
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/*
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* Copyright (c) 2004 Sam Leffler, Errno Consulting
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* Copyright (c) 2004 Video54 Technologies, Inc.
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* Copyright (c) 2008-2009 Atheros Communications Inc.
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*
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* Permission to use, copy, modify, and/or distribute this software for any
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* purpose with or without fee is hereby granted, provided that the above
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* copyright notice and this permission notice appear in all copies.
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*
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* THE SOFTWARE IS PROVIDED "AS IS" AND THE AUTHOR DISCLAIMS ALL WARRANTIES
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* WITH REGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED WARRANTIES OF
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* MERCHANTABILITY AND FITNESS. IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR
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* ANY SPECIAL, DIRECT, INDIRECT, OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES
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* WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR PROFITS, WHETHER IN AN
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* ACTION OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION, ARISING OUT OF
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* OR IN CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE.
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*/
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#ifndef RC_H
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#define RC_H
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struct ath_softc;
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#define ATH_RATE_MAX 30
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#define RATE_TABLE_SIZE 64
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#define MAX_TX_RATE_PHY 48
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/* VALID_ALL - valid for 20/40/Legacy,
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* VALID - Legacy only,
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* VALID_20 - HT 20 only,
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* VALID_40 - HT 40 only */
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#define INVALID 0x0
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#define VALID 0x1
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#define VALID_20 0x2
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#define VALID_40 0x4
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#define VALID_2040 (VALID_20|VALID_40)
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#define VALID_ALL (VALID_2040|VALID)
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enum {
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WLAN_RC_PHY_OFDM,
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WLAN_RC_PHY_CCK,
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WLAN_RC_PHY_HT_20_SS,
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WLAN_RC_PHY_HT_20_DS,
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WLAN_RC_PHY_HT_40_SS,
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WLAN_RC_PHY_HT_40_DS,
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WLAN_RC_PHY_HT_20_SS_HGI,
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WLAN_RC_PHY_HT_20_DS_HGI,
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WLAN_RC_PHY_HT_40_SS_HGI,
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WLAN_RC_PHY_HT_40_DS_HGI,
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WLAN_RC_PHY_MAX
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};
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#define WLAN_RC_PHY_DS(_phy) ((_phy == WLAN_RC_PHY_HT_20_DS) \
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|| (_phy == WLAN_RC_PHY_HT_40_DS) \
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|| (_phy == WLAN_RC_PHY_HT_20_DS_HGI) \
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|| (_phy == WLAN_RC_PHY_HT_40_DS_HGI))
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#define WLAN_RC_PHY_40(_phy) ((_phy == WLAN_RC_PHY_HT_40_SS) \
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|| (_phy == WLAN_RC_PHY_HT_40_DS) \
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|| (_phy == WLAN_RC_PHY_HT_40_SS_HGI) \
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|| (_phy == WLAN_RC_PHY_HT_40_DS_HGI))
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#define WLAN_RC_PHY_SGI(_phy) ((_phy == WLAN_RC_PHY_HT_20_SS_HGI) \
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|| (_phy == WLAN_RC_PHY_HT_20_DS_HGI) \
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|| (_phy == WLAN_RC_PHY_HT_40_SS_HGI) \
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|| (_phy == WLAN_RC_PHY_HT_40_DS_HGI))
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#define WLAN_RC_PHY_HT(_phy) (_phy >= WLAN_RC_PHY_HT_20_SS)
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#define WLAN_RC_CAP_MODE(capflag) (((capflag & WLAN_RC_HT_FLAG) ? \
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(capflag & WLAN_RC_40_FLAG) ? VALID_40 : VALID_20 : VALID))
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/* Return TRUE if flag supports HT20 && client supports HT20 or
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* return TRUE if flag supports HT40 && client supports HT40.
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* This is used becos some rates overlap between HT20/HT40.
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*/
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#define WLAN_RC_PHY_HT_VALID(flag, capflag) \
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(((flag & VALID_20) && !(capflag & WLAN_RC_40_FLAG)) || \
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((flag & VALID_40) && (capflag & WLAN_RC_40_FLAG)))
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#define WLAN_RC_DS_FLAG (0x01)
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#define WLAN_RC_40_FLAG (0x02)
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#define WLAN_RC_SGI_FLAG (0x04)
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#define WLAN_RC_HT_FLAG (0x08)
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/**
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* struct ath_rate_table - Rate Control table
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* @valid: valid for use in rate control
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* @valid_single_stream: valid for use in rate control for
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* single stream operation
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* @phy: CCK/OFDM
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* @ratekbps: rate in Kbits per second
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* @user_ratekbps: user rate in Kbits per second
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* @ratecode: rate that goes into HW descriptors
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* @short_preamble: Mask for enabling short preamble in ratecode for CCK
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* @dot11rate: value that goes into supported
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* rates info element of MLME
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* @ctrl_rate: Index of next lower basic rate, used for duration computation
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* @max_4ms_framelen: maximum frame length(bytes) for tx duration
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* @probe_interval: interval for rate control to probe for other rates
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* @rssi_reduce_interval: interval for rate control to reduce rssi
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* @initial_ratemax: initial ratemax value
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*/
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struct ath_rate_table {
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int rate_cnt;
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struct {
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int valid;
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int valid_single_stream;
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u8 phy;
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u32 ratekbps;
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u32 user_ratekbps;
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u8 ratecode;
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u8 short_preamble;
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u8 dot11rate;
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u8 ctrl_rate;
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u8 base_index;
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u8 cw40index;
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u8 sgi_index;
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u8 ht_index;
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u32 max_4ms_framelen;
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} info[RATE_TABLE_SIZE];
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u32 probe_interval;
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u8 initial_ratemax;
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};
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struct ath_rateset {
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u8 rs_nrates;
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u8 rs_rates[ATH_RATE_MAX];
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};
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/**
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* struct ath_rate_priv - Rate Control priv data
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* @state: RC state
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* @probe_rate: rate we are probing at
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* @probe_time: msec timestamp for last probe
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* @hw_maxretry_pktcnt: num of packets since we got HW max retry error
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* @max_valid_rate: maximum number of valid rate
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* @per_down_time: msec timestamp for last PER down step
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* @valid_phy_ratecnt: valid rate count
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* @rate_max_phy: phy index for the max rate
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* @per: PER for every valid rate in %
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* @probe_interval: interval for ratectrl to probe for other rates
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* @prev_data_rix: rate idx of last data frame
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* @ht_cap: HT capabilities
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* @neg_rates: Negotatied rates
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* @neg_ht_rates: Negotiated HT rates
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*/
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struct ath_rate_priv {
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u8 rate_table_size;
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u8 probe_rate;
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u8 hw_maxretry_pktcnt;
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u8 max_valid_rate;
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u8 valid_rate_index[RATE_TABLE_SIZE];
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u8 ht_cap;
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u8 valid_phy_ratecnt[WLAN_RC_PHY_MAX];
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u8 valid_phy_rateidx[WLAN_RC_PHY_MAX][RATE_TABLE_SIZE];
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u8 rate_max_phy;
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u8 per[RATE_TABLE_SIZE];
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u32 probe_time;
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u32 per_down_time;
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u32 probe_interval;
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u32 prev_data_rix;
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u32 tx_triglevel_max;
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struct ath_rateset neg_rates;
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struct ath_rateset neg_ht_rates;
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struct ath_rate_softc *asc;
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};
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enum ath9k_internal_frame_type {
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ATH9K_NOT_INTERNAL,
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ATH9K_INT_PAUSE,
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ATH9K_INT_UNPAUSE
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};
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struct ath_tx_info_priv {
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struct ath_wiphy *aphy;
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struct ath_tx_status tx;
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int n_frames;
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int n_bad_frames;
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bool update_rc;
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enum ath9k_internal_frame_type frame_type;
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};
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#define ATH_TX_INFO_PRIV(tx_info) \
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((struct ath_tx_info_priv *)((tx_info)->rate_driver_data[0]))
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void ath_rate_attach(struct ath_softc *sc);
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u8 ath_rate_findrateix(struct ath_softc *sc, u8 dot11_rate);
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int ath_rate_control_register(void);
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void ath_rate_control_unregister(void);
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#endif /* RC_H */
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