2 * Copyright (c) 2004 Sam Leffler, Errno Consulting
3 * Copyright (c) 2004 Video54 Technologies, Inc.
4 * Copyright (c) 2008-2009 Atheros Communications Inc.
6 * Permission to use, copy, modify, and/or distribute this software for any
7 * purpose with or without fee is hereby granted, provided that the above
8 * copyright notice and this permission notice appear in all copies.
10 * THE SOFTWARE IS PROVIDED "AS IS" AND THE AUTHOR DISCLAIMS ALL WARRANTIES
11 * WITH REGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED WARRANTIES OF
12 * MERCHANTABILITY AND FITNESS. IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR
13 * ANY SPECIAL, DIRECT, INDIRECT, OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES
14 * WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR PROFITS, WHETHER IN AN
15 * ACTION OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION, ARISING OUT OF
16 * OR IN CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE.
26 #define ATH_RATE_MAX 30
27 #define RATE_TABLE_SIZE 64
28 #define MAX_TX_RATE_PHY 48
30 /* VALID_ALL - valid for 20/40/Legacy,
31 * VALID - Legacy only,
32 * VALID_20 - HT 20 only,
33 * VALID_40 - HT 40 only */
39 #define VALID_2040 (VALID_20|VALID_40)
40 #define VALID_ALL (VALID_2040|VALID)
49 WLAN_RC_PHY_HT_20_SS_HGI,
50 WLAN_RC_PHY_HT_20_DS_HGI,
51 WLAN_RC_PHY_HT_40_SS_HGI,
52 WLAN_RC_PHY_HT_40_DS_HGI,
56 #define WLAN_RC_PHY_DS(_phy) ((_phy == WLAN_RC_PHY_HT_20_DS) \
57 || (_phy == WLAN_RC_PHY_HT_40_DS) \
58 || (_phy == WLAN_RC_PHY_HT_20_DS_HGI) \
59 || (_phy == WLAN_RC_PHY_HT_40_DS_HGI))
60 #define WLAN_RC_PHY_20(_phy) ((_phy == WLAN_RC_PHY_HT_20_SS) \
61 || (_phy == WLAN_RC_PHY_HT_20_DS) \
62 || (_phy == WLAN_RC_PHY_HT_20_SS_HGI) \
63 || (_phy == WLAN_RC_PHY_HT_20_DS_HGI))
64 #define WLAN_RC_PHY_40(_phy) ((_phy == WLAN_RC_PHY_HT_40_SS) \
65 || (_phy == WLAN_RC_PHY_HT_40_DS) \
66 || (_phy == WLAN_RC_PHY_HT_40_SS_HGI) \
67 || (_phy == WLAN_RC_PHY_HT_40_DS_HGI))
68 #define WLAN_RC_PHY_SGI(_phy) ((_phy == WLAN_RC_PHY_HT_20_SS_HGI) \
69 || (_phy == WLAN_RC_PHY_HT_20_DS_HGI) \
70 || (_phy == WLAN_RC_PHY_HT_40_SS_HGI) \
71 || (_phy == WLAN_RC_PHY_HT_40_DS_HGI))
73 #define WLAN_RC_PHY_HT(_phy) (_phy >= WLAN_RC_PHY_HT_20_SS)
75 #define WLAN_RC_CAP_MODE(capflag) (((capflag & WLAN_RC_HT_FLAG) ? \
76 (capflag & WLAN_RC_40_FLAG) ? VALID_40 : VALID_20 : VALID))
78 /* Return TRUE if flag supports HT20 && client supports HT20 or
79 * return TRUE if flag supports HT40 && client supports HT40.
80 * This is used becos some rates overlap between HT20/HT40.
82 #define WLAN_RC_PHY_HT_VALID(flag, capflag) \
83 (((flag & VALID_20) && !(capflag & WLAN_RC_40_FLAG)) || \
84 ((flag & VALID_40) && (capflag & WLAN_RC_40_FLAG)))
86 #define WLAN_RC_DS_FLAG (0x01)
87 #define WLAN_RC_40_FLAG (0x02)
88 #define WLAN_RC_SGI_FLAG (0x04)
89 #define WLAN_RC_HT_FLAG (0x08)
92 * struct ath_rate_table - Rate Control table
93 * @valid: valid for use in rate control
94 * @valid_single_stream: valid for use in rate control for
95 * single stream operation
97 * @ratekbps: rate in Kbits per second
98 * @user_ratekbps: user rate in Kbits per second
99 * @ratecode: rate that goes into HW descriptors
100 * @short_preamble: Mask for enabling short preamble in ratecode for CCK
101 * @dot11rate: value that goes into supported
102 * rates info element of MLME
103 * @ctrl_rate: Index of next lower basic rate, used for duration computation
104 * @max_4ms_framelen: maximum frame length(bytes) for tx duration
105 * @probe_interval: interval for rate control to probe for other rates
106 * @rssi_reduce_interval: interval for rate control to reduce rssi
107 * @initial_ratemax: initial ratemax value
109 struct ath_rate_table {
114 int valid_single_stream;
125 } info[RATE_TABLE_SIZE];
132 u8 rs_rates[ATH_RATE_MAX];
136 * struct ath_rate_priv - Rate Control priv data
138 * @probe_rate: rate we are probing at
139 * @probe_time: msec timestamp for last probe
140 * @hw_maxretry_pktcnt: num of packets since we got HW max retry error
141 * @max_valid_rate: maximum number of valid rate
142 * @per_down_time: msec timestamp for last PER down step
143 * @valid_phy_ratecnt: valid rate count
144 * @rate_max_phy: phy index for the max rate
145 * @per: PER for every valid rate in %
146 * @probe_interval: interval for ratectrl to probe for other rates
147 * @prev_data_rix: rate idx of last data frame
148 * @ht_cap: HT capabilities
149 * @neg_rates: Negotatied rates
150 * @neg_ht_rates: Negotiated HT rates
152 struct ath_rate_priv {
155 u8 hw_maxretry_pktcnt;
157 u8 valid_rate_index[RATE_TABLE_SIZE];
159 u8 valid_phy_ratecnt[WLAN_RC_PHY_MAX];
160 u8 valid_phy_rateidx[WLAN_RC_PHY_MAX][RATE_TABLE_SIZE];
162 u8 per[RATE_TABLE_SIZE];
167 u32 tx_triglevel_max;
168 struct ath_rateset neg_rates;
169 struct ath_rateset neg_ht_rates;
170 struct ath_rate_softc *asc;
173 #define ATH_TX_INFO_FRAME_TYPE_INTERNAL (1 << 0)
174 #define ATH_TX_INFO_FRAME_TYPE_PAUSE (1 << 1)
175 #define ATH_TX_INFO_UPDATE_RC (1 << 2)
176 #define ATH_TX_INFO_XRETRY (1 << 3)
177 #define ATH_TX_INFO_UNDERRUN (1 << 4)
179 enum ath9k_internal_frame_type {
185 int ath_rate_control_register(void);
186 void ath_rate_control_unregister(void);