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-rw-r--r--drivers/net/wireless/ath/ath9k/rc.h216
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diff --git a/drivers/net/wireless/ath/ath9k/rc.h b/drivers/net/wireless/ath/ath9k/rc.h
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1/*
2 * Copyright (c) 2004 Sam Leffler, Errno Consulting
3 * Copyright (c) 2004 Video54 Technologies, Inc.
4 * Copyright (c) 2008-2009 Atheros Communications Inc.
5 *
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.
9 *
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.
17 */
18
19#ifndef RC_H
20#define RC_H
21
22struct ath_softc;
23
24#define ATH_RATE_MAX 30
25#define RATE_TABLE_SIZE 64
26#define MAX_TX_RATE_PHY 48
27
28/* VALID_ALL - valid for 20/40/Legacy,
29 * VALID - Legacy only,
30 * VALID_20 - HT 20 only,
31 * VALID_40 - HT 40 only */
32
33#define INVALID 0x0
34#define VALID 0x1
35#define VALID_20 0x2
36#define VALID_40 0x4
37#define VALID_2040 (VALID_20|VALID_40)
38#define VALID_ALL (VALID_2040|VALID)
39
40enum {
41 WLAN_RC_PHY_OFDM,
42 WLAN_RC_PHY_CCK,
43 WLAN_RC_PHY_HT_20_SS,
44 WLAN_RC_PHY_HT_20_DS,
45 WLAN_RC_PHY_HT_40_SS,
46 WLAN_RC_PHY_HT_40_DS,
47 WLAN_RC_PHY_HT_20_SS_HGI,
48 WLAN_RC_PHY_HT_20_DS_HGI,
49 WLAN_RC_PHY_HT_40_SS_HGI,
50 WLAN_RC_PHY_HT_40_DS_HGI,
51 WLAN_RC_PHY_MAX
52};
53
54#define WLAN_RC_PHY_DS(_phy) ((_phy == WLAN_RC_PHY_HT_20_DS) \
55 || (_phy == WLAN_RC_PHY_HT_40_DS) \
56 || (_phy == WLAN_RC_PHY_HT_20_DS_HGI) \
57 || (_phy == WLAN_RC_PHY_HT_40_DS_HGI))
58#define WLAN_RC_PHY_40(_phy) ((_phy == WLAN_RC_PHY_HT_40_SS) \
59 || (_phy == WLAN_RC_PHY_HT_40_DS) \
60 || (_phy == WLAN_RC_PHY_HT_40_SS_HGI) \
61 || (_phy == WLAN_RC_PHY_HT_40_DS_HGI))
62#define WLAN_RC_PHY_SGI(_phy) ((_phy == WLAN_RC_PHY_HT_20_SS_HGI) \
63 || (_phy == WLAN_RC_PHY_HT_20_DS_HGI) \
64 || (_phy == WLAN_RC_PHY_HT_40_SS_HGI) \
65 || (_phy == WLAN_RC_PHY_HT_40_DS_HGI))
66
67#define WLAN_RC_PHY_HT(_phy) (_phy >= WLAN_RC_PHY_HT_20_SS)
68
69#define WLAN_RC_CAP_MODE(capflag) (((capflag & WLAN_RC_HT_FLAG) ? \
70 (capflag & WLAN_RC_40_FLAG) ? VALID_40 : VALID_20 : VALID))
71
72/* Return TRUE if flag supports HT20 && client supports HT20 or
73 * return TRUE if flag supports HT40 && client supports HT40.
74 * This is used becos some rates overlap between HT20/HT40.
75 */
76#define WLAN_RC_PHY_HT_VALID(flag, capflag) \
77 (((flag & VALID_20) && !(capflag & WLAN_RC_40_FLAG)) || \
78 ((flag & VALID_40) && (capflag & WLAN_RC_40_FLAG)))
79
80#define WLAN_RC_DS_FLAG (0x01)
81#define WLAN_RC_40_FLAG (0x02)
82#define WLAN_RC_SGI_FLAG (0x04)
83#define WLAN_RC_HT_FLAG (0x08)
84
85/**
86 * struct ath_rate_table - Rate Control table
87 * @valid: valid for use in rate control
88 * @valid_single_stream: valid for use in rate control for
89 * single stream operation
90 * @phy: CCK/OFDM
91 * @ratekbps: rate in Kbits per second
92 * @user_ratekbps: user rate in Kbits per second
93 * @ratecode: rate that goes into HW descriptors
94 * @short_preamble: Mask for enabling short preamble in ratecode for CCK
95 * @dot11rate: value that goes into supported
96 * rates info element of MLME
97 * @ctrl_rate: Index of next lower basic rate, used for duration computation
98 * @max_4ms_framelen: maximum frame length(bytes) for tx duration
99 * @probe_interval: interval for rate control to probe for other rates
100 * @rssi_reduce_interval: interval for rate control to reduce rssi
101 * @initial_ratemax: initial ratemax value
102 */
103struct ath_rate_table {
104 int rate_cnt;
105 struct {
106 int valid;
107 int valid_single_stream;
108 u8 phy;
109 u32 ratekbps;
110 u32 user_ratekbps;
111 u8 ratecode;
112 u8 short_preamble;
113 u8 dot11rate;
114 u8 ctrl_rate;
115 int8_t rssi_ack_validmin;
116 int8_t rssi_ack_deltamin;
117 u8 base_index;
118 u8 cw40index;
119 u8 sgi_index;
120 u8 ht_index;
121 u32 max_4ms_framelen;
122 } info[RATE_TABLE_SIZE];
123 u32 probe_interval;
124 u32 rssi_reduce_interval;
125 u8 initial_ratemax;
126};
127
128struct ath_tx_ratectrl_state {
129 int8_t rssi_thres; /* required rssi for this rate (dB) */
130 u8 per; /* recent estimate of packet error rate (%) */
131};
132
133struct ath_rateset {
134 u8 rs_nrates;
135 u8 rs_rates[ATH_RATE_MAX];
136};
137
138/**
139 * struct ath_rate_priv - Rate Control priv data
140 * @state: RC state
141 * @rssi_last: last ACK rssi
142 * @rssi_last_lookup: last ACK rssi used for lookup
143 * @rssi_last_prev: previous last ACK rssi
144 * @rssi_last_prev2: 2nd previous last ACK rssi
145 * @rssi_sum_cnt: count of rssi_sum for averaging
146 * @rssi_sum_rate: rate that we are averaging
147 * @rssi_sum: running sum of rssi for averaging
148 * @probe_rate: rate we are probing at
149 * @rssi_time: msec timestamp for last ack rssi
150 * @rssi_down_time: msec timestamp for last down step
151 * @probe_time: msec timestamp for last probe
152 * @hw_maxretry_pktcnt: num of packets since we got HW max retry error
153 * @max_valid_rate: maximum number of valid rate
154 * @per_down_time: msec timestamp for last PER down step
155 * @valid_phy_ratecnt: valid rate count
156 * @rate_max_phy: phy index for the max rate
157 * @probe_interval: interval for ratectrl to probe for other rates
158 * @prev_data_rix: rate idx of last data frame
159 * @ht_cap: HT capabilities
160 * @neg_rates: Negotatied rates
161 * @neg_ht_rates: Negotiated HT rates
162 */
163struct ath_rate_priv {
164 int8_t rssi_last;
165 int8_t rssi_last_lookup;
166 int8_t rssi_last_prev;
167 int8_t rssi_last_prev2;
168 int32_t rssi_sum_cnt;
169 int32_t rssi_sum_rate;
170 int32_t rssi_sum;
171 u8 rate_table_size;
172 u8 probe_rate;
173 u8 hw_maxretry_pktcnt;
174 u8 max_valid_rate;
175 u8 valid_rate_index[RATE_TABLE_SIZE];
176 u8 ht_cap;
177 u8 valid_phy_ratecnt[WLAN_RC_PHY_MAX];
178 u8 valid_phy_rateidx[WLAN_RC_PHY_MAX][RATE_TABLE_SIZE];
179 u8 rate_max_phy;
180 u32 rssi_time;
181 u32 rssi_down_time;
182 u32 probe_time;
183 u32 per_down_time;
184 u32 probe_interval;
185 u32 prev_data_rix;
186 u32 tx_triglevel_max;
187 struct ath_tx_ratectrl_state state[RATE_TABLE_SIZE];
188 struct ath_rateset neg_rates;
189 struct ath_rateset neg_ht_rates;
190 struct ath_rate_softc *asc;
191};
192
193enum ath9k_internal_frame_type {
194 ATH9K_NOT_INTERNAL,
195 ATH9K_INT_PAUSE,
196 ATH9K_INT_UNPAUSE
197};
198
199struct ath_tx_info_priv {
200 struct ath_wiphy *aphy;
201 struct ath_tx_status tx;
202 int n_frames;
203 int n_bad_frames;
204 bool update_rc;
205 enum ath9k_internal_frame_type frame_type;
206};
207
208#define ATH_TX_INFO_PRIV(tx_info) \
209 ((struct ath_tx_info_priv *)((tx_info)->rate_driver_data[0]))
210
211void ath_rate_attach(struct ath_softc *sc);
212u8 ath_rate_findrateix(struct ath_softc *sc, u8 dot11_rate);
213int ath_rate_control_register(void);
214void ath_rate_control_unregister(void);
215
216#endif /* RC_H */
generated by cgit v1.2.2 (git 2.25.0) at 2024-12-17 00:11:40 -0500