237 lines
7.4 KiB
C
237 lines
7.4 KiB
C
/*
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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) 2008-2011 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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#include "hw.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 72
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#define RC_INVALID 0x0000
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#define RC_LEGACY 0x0001
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#define RC_SS 0x0002
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#define RC_DS 0x0004
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#define RC_TS 0x0008
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#define RC_HT_20 0x0010
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#define RC_HT_40 0x0020
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#define RC_STREAM_MASK 0xe
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#define RC_DS_OR_LATER(f) ((((f) & RC_STREAM_MASK) == RC_DS) || \
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(((f) & RC_STREAM_MASK) == (RC_DS | RC_TS)))
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#define RC_TS_ONLY(f) (((f) & RC_STREAM_MASK) == RC_TS)
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#define RC_SS_OR_LEGACY(f) ((f) & (RC_SS | RC_LEGACY))
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#define RC_HT_2040 (RC_HT_20 | RC_HT_40)
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#define RC_ALL_STREAM (RC_SS | RC_DS | RC_TS)
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#define RC_L_SD (RC_LEGACY | RC_SS | RC_DS)
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#define RC_L_SDT (RC_LEGACY | RC_SS | RC_DS | RC_TS)
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#define RC_HT_S_20 (RC_HT_20 | RC_SS)
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#define RC_HT_D_20 (RC_HT_20 | RC_DS)
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#define RC_HT_T_20 (RC_HT_20 | RC_TS)
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#define RC_HT_S_40 (RC_HT_40 | RC_SS)
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#define RC_HT_D_40 (RC_HT_40 | RC_DS)
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#define RC_HT_T_40 (RC_HT_40 | RC_TS)
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#define RC_HT_SD_20 (RC_HT_20 | RC_SS | RC_DS)
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#define RC_HT_DT_20 (RC_HT_20 | RC_DS | RC_TS)
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#define RC_HT_SD_40 (RC_HT_40 | RC_SS | RC_DS)
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#define RC_HT_DT_40 (RC_HT_40 | RC_DS | RC_TS)
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#define RC_HT_SD_2040 (RC_HT_2040 | RC_SS | RC_DS)
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#define RC_HT_SDT_2040 (RC_HT_2040 | RC_SS | RC_DS | RC_TS)
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#define RC_HT_SDT_20 (RC_HT_20 | RC_SS | RC_DS | RC_TS)
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#define RC_HT_SDT_40 (RC_HT_40 | RC_SS | RC_DS | RC_TS)
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#define RC_ALL (RC_LEGACY | RC_HT_2040 | RC_ALL_STREAM)
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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_20_TS,
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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_40_TS,
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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_20_TS_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_HT_40_TS_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_TS(_phy) ((_phy == WLAN_RC_PHY_HT_20_TS) \
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|| (_phy == WLAN_RC_PHY_HT_40_TS) \
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|| (_phy == WLAN_RC_PHY_HT_20_TS_HGI) \
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|| (_phy == WLAN_RC_PHY_HT_40_TS_HGI))
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#define WLAN_RC_PHY_20(_phy) ((_phy == WLAN_RC_PHY_HT_20_SS) \
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|| (_phy == WLAN_RC_PHY_HT_20_DS) \
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|| (_phy == WLAN_RC_PHY_HT_20_TS) \
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|| (_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_20_TS_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_TS) \
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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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|| (_phy == WLAN_RC_PHY_HT_40_TS_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_20_TS_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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|| (_phy == WLAN_RC_PHY_HT_40_TS_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) ? RC_HT_40 : RC_HT_20) : RC_LEGACY))
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#define WLAN_RC_CAP_STREAM(capflag) (((capflag & WLAN_RC_TS_FLAG) ? \
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(RC_TS) : ((capflag & WLAN_RC_DS_FLAG) ? RC_DS : RC_SS)))
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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 & RC_HT_20) && !(capflag & WLAN_RC_40_FLAG)) || \
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((flag & RC_HT_40) && (capflag & WLAN_RC_40_FLAG)))
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#define WLAN_RC_DS_FLAG (0x01)
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#define WLAN_RC_TS_FLAG (0x02)
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#define WLAN_RC_40_FLAG (0x04)
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#define WLAN_RC_SGI_FLAG (0x08)
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#define WLAN_RC_HT_FLAG (0x10)
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/**
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* struct ath_rate_table - Rate Control table
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* @rate_cnt: total number of rates for the given wireless mode
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* @mcs_start: MCS rate index offset
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* @rate_flags: Rate Control flags
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* @phy: CCK/OFDM/HT20/HT40
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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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* @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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* @cw40index: Index of rates having 40MHz channel width
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* @sgi_index: Index of rates having Short Guard Interval
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* @ht_index: high throughput rates having 40MHz channel width and
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* Short Guard Interval
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* @probe_interval: interval for rate control to probe for other rates
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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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int mcs_start;
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struct {
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u16 rate_flags;
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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 dot11rate;
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u8 ctrl_rate;
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u8 cw40index;
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u8 sgi_index;
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u8 ht_index;
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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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struct ath_rc_stats {
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u32 success;
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u32 retries;
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u32 xretries;
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u8 per;
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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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* @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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struct ath_rateset neg_rates;
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struct ath_rateset neg_ht_rates;
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const struct ath_rate_table *rate_table;
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struct dentry *debugfs_rcstats;
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struct ath_rc_stats rcstats[RATE_TABLE_SIZE];
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};
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#ifdef CONFIG_ATH9K_RATE_CONTROL
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int ath_rate_control_register(void);
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void ath_rate_control_unregister(void);
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#else
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static inline int ath_rate_control_register(void)
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{
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return 0;
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}
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static inline void ath_rate_control_unregister(void)
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{
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}
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#endif
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#endif /* RC_H */
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