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f078f209 LR |
1 | /* |
2 | * Copyright (c) 2004 Video54 Technologies, Inc. | |
3 | * Copyright (c) 2004-2008 Atheros Communications, Inc. | |
4 | * | |
5 | * Permission to use, copy, modify, and/or distribute this software for any | |
6 | * purpose with or without fee is hereby granted, provided that the above | |
7 | * copyright notice and this permission notice appear in all copies. | |
8 | * | |
9 | * THE SOFTWARE IS PROVIDED "AS IS" AND THE AUTHOR DISCLAIMS ALL WARRANTIES | |
10 | * WITH REGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED WARRANTIES OF | |
11 | * MERCHANTABILITY AND FITNESS. IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR | |
12 | * ANY SPECIAL, DIRECT, INDIRECT, OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES | |
13 | * WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR PROFITS, WHETHER IN AN | |
14 | * ACTION OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION, ARISING OUT OF | |
15 | * OR IN CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE. | |
16 | */ | |
17 | ||
f078f209 | 18 | #include "core.h" |
f078f209 | 19 | |
f078f209 LR |
20 | static struct ath_rate_table ar5416_11na_ratetable = { |
21 | 42, | |
e63835b0 | 22 | {0}, |
f078f209 | 23 | { |
46d14a58 | 24 | { VALID, VALID, WLAN_RC_PHY_OFDM, 6000, /* 6 Mb */ |
f078f209 LR |
25 | 5400, 0x0b, 0x00, 12, |
26 | 0, 2, 1, 0, 0, 0, 0, 0 }, | |
46d14a58 | 27 | { VALID, VALID, WLAN_RC_PHY_OFDM, 9000, /* 9 Mb */ |
f078f209 LR |
28 | 7800, 0x0f, 0x00, 18, |
29 | 0, 3, 1, 1, 1, 1, 1, 0 }, | |
46d14a58 | 30 | { VALID, VALID, WLAN_RC_PHY_OFDM, 12000, /* 12 Mb */ |
f078f209 LR |
31 | 10000, 0x0a, 0x00, 24, |
32 | 2, 4, 2, 2, 2, 2, 2, 0 }, | |
46d14a58 | 33 | { VALID, VALID, WLAN_RC_PHY_OFDM, 18000, /* 18 Mb */ |
f078f209 LR |
34 | 13900, 0x0e, 0x00, 36, |
35 | 2, 6, 2, 3, 3, 3, 3, 0 }, | |
46d14a58 | 36 | { VALID, VALID, WLAN_RC_PHY_OFDM, 24000, /* 24 Mb */ |
f078f209 LR |
37 | 17300, 0x09, 0x00, 48, |
38 | 4, 10, 3, 4, 4, 4, 4, 0 }, | |
46d14a58 | 39 | { VALID, VALID, WLAN_RC_PHY_OFDM, 36000, /* 36 Mb */ |
f078f209 LR |
40 | 23000, 0x0d, 0x00, 72, |
41 | 4, 14, 3, 5, 5, 5, 5, 0 }, | |
46d14a58 | 42 | { VALID, VALID, WLAN_RC_PHY_OFDM, 48000, /* 48 Mb */ |
f078f209 LR |
43 | 27400, 0x08, 0x00, 96, |
44 | 4, 20, 3, 6, 6, 6, 6, 0 }, | |
46d14a58 | 45 | { VALID, VALID, WLAN_RC_PHY_OFDM, 54000, /* 54 Mb */ |
f078f209 LR |
46 | 29300, 0x0c, 0x00, 108, |
47 | 4, 23, 3, 7, 7, 7, 7, 0 }, | |
46d14a58 | 48 | { VALID_20, VALID_20, WLAN_RC_PHY_HT_20_SS, 6500, /* 6.5 Mb */ |
f078f209 LR |
49 | 6400, 0x80, 0x00, 0, |
50 | 0, 2, 3, 8, 24, 8, 24, 3216 }, | |
46d14a58 | 51 | { VALID_20, VALID_20, WLAN_RC_PHY_HT_20_SS, 13000, /* 13 Mb */ |
f078f209 LR |
52 | 12700, 0x81, 0x00, 1, |
53 | 2, 4, 3, 9, 25, 9, 25, 6434 }, | |
46d14a58 | 54 | { VALID_20, VALID_20, WLAN_RC_PHY_HT_20_SS, 19500, /* 19.5 Mb */ |
f078f209 LR |
55 | 18800, 0x82, 0x00, 2, |
56 | 2, 6, 3, 10, 26, 10, 26, 9650 }, | |
46d14a58 | 57 | { VALID_20, VALID_20, WLAN_RC_PHY_HT_20_SS, 26000, /* 26 Mb */ |
f078f209 LR |
58 | 25000, 0x83, 0x00, 3, |
59 | 4, 10, 3, 11, 27, 11, 27, 12868 }, | |
46d14a58 | 60 | { VALID_20, VALID_20, WLAN_RC_PHY_HT_20_SS, 39000, /* 39 Mb */ |
f078f209 LR |
61 | 36700, 0x84, 0x00, 4, |
62 | 4, 14, 3, 12, 28, 12, 28, 19304 }, | |
46d14a58 | 63 | { INVALID, VALID_20, WLAN_RC_PHY_HT_20_SS, 52000, /* 52 Mb */ |
f078f209 LR |
64 | 48100, 0x85, 0x00, 5, |
65 | 4, 20, 3, 13, 29, 13, 29, 25740 }, | |
46d14a58 | 66 | { INVALID, VALID_20, WLAN_RC_PHY_HT_20_SS, 58500, /* 58.5 Mb */ |
f078f209 LR |
67 | 53500, 0x86, 0x00, 6, |
68 | 4, 23, 3, 14, 30, 14, 30, 28956 }, | |
46d14a58 | 69 | { INVALID, VALID_20, WLAN_RC_PHY_HT_20_SS, 65000, /* 65 Mb */ |
f078f209 LR |
70 | 59000, 0x87, 0x00, 7, |
71 | 4, 25, 3, 15, 31, 15, 32, 32180 }, | |
46d14a58 | 72 | { INVALID, INVALID, WLAN_RC_PHY_HT_20_DS, 13000, /* 13 Mb */ |
f078f209 LR |
73 | 12700, 0x88, 0x00, |
74 | 8, 0, 2, 3, 16, 33, 16, 33, 6430 }, | |
46d14a58 | 75 | { INVALID, INVALID, WLAN_RC_PHY_HT_20_DS, 26000, /* 26 Mb */ |
f078f209 LR |
76 | 24800, 0x89, 0x00, 9, |
77 | 2, 4, 3, 17, 34, 17, 34, 12860 }, | |
46d14a58 | 78 | { INVALID, INVALID, WLAN_RC_PHY_HT_20_DS, 39000, /* 39 Mb */ |
f078f209 LR |
79 | 36600, 0x8a, 0x00, 10, |
80 | 2, 6, 3, 18, 35, 18, 35, 19300 }, | |
46d14a58 | 81 | { VALID_20, INVALID, WLAN_RC_PHY_HT_20_DS, 52000, /* 52 Mb */ |
f078f209 LR |
82 | 48100, 0x8b, 0x00, 11, |
83 | 4, 10, 3, 19, 36, 19, 36, 25736 }, | |
46d14a58 | 84 | { VALID_20, INVALID, WLAN_RC_PHY_HT_20_DS, 78000, /* 78 Mb */ |
f078f209 LR |
85 | 69500, 0x8c, 0x00, 12, |
86 | 4, 14, 3, 20, 37, 20, 37, 38600 }, | |
46d14a58 | 87 | { VALID_20, INVALID, WLAN_RC_PHY_HT_20_DS, 104000, /* 104 Mb */ |
f078f209 LR |
88 | 89500, 0x8d, 0x00, 13, |
89 | 4, 20, 3, 21, 38, 21, 38, 51472 }, | |
46d14a58 | 90 | { VALID_20, INVALID, WLAN_RC_PHY_HT_20_DS, 117000, /* 117 Mb */ |
f078f209 LR |
91 | 98900, 0x8e, 0x00, 14, |
92 | 4, 23, 3, 22, 39, 22, 39, 57890 }, | |
46d14a58 | 93 | { VALID_20, INVALID, WLAN_RC_PHY_HT_20_DS, 130000, /* 130 Mb */ |
f078f209 LR |
94 | 108300, 0x8f, 0x00, 15, |
95 | 4, 25, 3, 23, 40, 23, 41, 64320 }, | |
46d14a58 | 96 | { VALID_40, VALID_40, WLAN_RC_PHY_HT_40_SS, 13500, /* 13.5 Mb */ |
f078f209 LR |
97 | 13200, 0x80, 0x00, 0, |
98 | 0, 2, 3, 8, 24, 24, 24, 6684 }, | |
46d14a58 | 99 | { VALID_40, VALID_40, WLAN_RC_PHY_HT_40_SS, 27500, /* 27.0 Mb */ |
f078f209 LR |
100 | 25900, 0x81, 0x00, 1, |
101 | 2, 4, 3, 9, 25, 25, 25, 13368 }, | |
46d14a58 | 102 | { VALID_40, VALID_40, WLAN_RC_PHY_HT_40_SS, 40500, /* 40.5 Mb */ |
f078f209 LR |
103 | 38600, 0x82, 0x00, 2, |
104 | 2, 6, 3, 10, 26, 26, 26, 20052 }, | |
46d14a58 | 105 | { VALID_40, VALID_40, WLAN_RC_PHY_HT_40_SS, 54000, /* 54 Mb */ |
f078f209 LR |
106 | 49800, 0x83, 0x00, 3, |
107 | 4, 10, 3, 11, 27, 27, 27, 26738 }, | |
46d14a58 | 108 | { VALID_40, VALID_40, WLAN_RC_PHY_HT_40_SS, 81500, /* 81 Mb */ |
f078f209 LR |
109 | 72200, 0x84, 0x00, 4, |
110 | 4, 14, 3, 12, 28, 28, 28, 40104 }, | |
46d14a58 | 111 | { INVALID, VALID_40, WLAN_RC_PHY_HT_40_SS, 108000, /* 108 Mb */ |
f078f209 LR |
112 | 92900, 0x85, 0x00, 5, |
113 | 4, 20, 3, 13, 29, 29, 29, 53476 }, | |
46d14a58 | 114 | { INVALID, VALID_40, WLAN_RC_PHY_HT_40_SS, 121500, /* 121.5 Mb */ |
f078f209 LR |
115 | 102700, 0x86, 0x00, 6, |
116 | 4, 23, 3, 14, 30, 30, 30, 60156 }, | |
46d14a58 | 117 | { INVALID, VALID_40, WLAN_RC_PHY_HT_40_SS, 135000, /* 135 Mb */ |
f078f209 LR |
118 | 112000, 0x87, 0x00, 7, |
119 | 4, 25, 3, 15, 31, 32, 32, 66840 }, | |
46d14a58 | 120 | { INVALID, VALID_40, WLAN_RC_PHY_HT_40_SS_HGI, 150000, /* 150 Mb */ |
f078f209 LR |
121 | 122000, 0x87, 0x00, 7, |
122 | 4, 25, 3, 15, 31, 32, 32, 74200 }, | |
46d14a58 | 123 | { INVALID, INVALID, WLAN_RC_PHY_HT_40_DS, 27000, /* 27 Mb */ |
f078f209 LR |
124 | 25800, 0x88, 0x00, 8, |
125 | 0, 2, 3, 16, 33, 33, 33, 13360 }, | |
46d14a58 | 126 | { INVALID, INVALID, WLAN_RC_PHY_HT_40_DS, 54000, /* 54 Mb */ |
f078f209 LR |
127 | 49800, 0x89, 0x00, 9, |
128 | 2, 4, 3, 17, 34, 34, 34, 26720 }, | |
46d14a58 | 129 | { INVALID, INVALID, WLAN_RC_PHY_HT_40_DS, 81000, /* 81 Mb */ |
f078f209 LR |
130 | 71900, 0x8a, 0x00, 10, |
131 | 2, 6, 3, 18, 35, 35, 35, 40080 }, | |
46d14a58 | 132 | { VALID_40, INVALID, WLAN_RC_PHY_HT_40_DS, 108000, /* 108 Mb */ |
f078f209 LR |
133 | 92500, 0x8b, 0x00, 11, |
134 | 4, 10, 3, 19, 36, 36, 36, 53440 }, | |
46d14a58 | 135 | { VALID_40, INVALID, WLAN_RC_PHY_HT_40_DS, 162000, /* 162 Mb */ |
f078f209 LR |
136 | 130300, 0x8c, 0x00, 12, |
137 | 4, 14, 3, 20, 37, 37, 37, 80160 }, | |
46d14a58 | 138 | { VALID_40, INVALID, WLAN_RC_PHY_HT_40_DS, 216000, /* 216 Mb */ |
f078f209 LR |
139 | 162800, 0x8d, 0x00, 13, |
140 | 4, 20, 3, 21, 38, 38, 38, 106880 }, | |
46d14a58 | 141 | { VALID_40, INVALID, WLAN_RC_PHY_HT_40_DS, 243000, /* 243 Mb */ |
f078f209 LR |
142 | 178200, 0x8e, 0x00, 14, |
143 | 4, 23, 3, 22, 39, 39, 39, 120240 }, | |
46d14a58 | 144 | { VALID_40, INVALID, WLAN_RC_PHY_HT_40_DS, 270000, /* 270 Mb */ |
f078f209 LR |
145 | 192100, 0x8f, 0x00, 15, |
146 | 4, 25, 3, 23, 40, 41, 41, 133600 }, | |
46d14a58 | 147 | { VALID_40, INVALID, WLAN_RC_PHY_HT_40_DS_HGI, 300000, /* 300 Mb */ |
f078f209 LR |
148 | 207000, 0x8f, 0x00, 15, |
149 | 4, 25, 3, 23, 40, 41, 41, 148400 }, | |
150 | }, | |
151 | 50, /* probe interval */ | |
152 | 50, /* rssi reduce interval */ | |
153 | WLAN_RC_HT_FLAG, /* Phy rates allowed initially */ | |
154 | }; | |
155 | ||
f078f209 LR |
156 | /* 4ms frame limit not used for NG mode. The values filled |
157 | * for HT are the 64K max aggregate limit */ | |
158 | ||
159 | static struct ath_rate_table ar5416_11ng_ratetable = { | |
160 | 46, | |
e63835b0 | 161 | {0}, |
f078f209 | 162 | { |
46d14a58 | 163 | { VALID_ALL, VALID_ALL, WLAN_RC_PHY_CCK, 1000, /* 1 Mb */ |
f078f209 LR |
164 | 900, 0x1b, 0x00, 2, |
165 | 0, 0, 1, 0, 0, 0, 0, 0 }, | |
46d14a58 | 166 | { VALID_ALL, VALID_ALL, WLAN_RC_PHY_CCK, 2000, /* 2 Mb */ |
f078f209 LR |
167 | 1900, 0x1a, 0x04, 4, |
168 | 1, 1, 1, 1, 1, 1, 1, 0 }, | |
46d14a58 | 169 | { VALID_ALL, VALID_ALL, WLAN_RC_PHY_CCK, 5500, /* 5.5 Mb */ |
f078f209 LR |
170 | 4900, 0x19, 0x04, 11, |
171 | 2, 2, 2, 2, 2, 2, 2, 0 }, | |
46d14a58 | 172 | { VALID_ALL, VALID_ALL, WLAN_RC_PHY_CCK, 11000, /* 11 Mb */ |
f078f209 LR |
173 | 8100, 0x18, 0x04, 22, |
174 | 3, 3, 2, 3, 3, 3, 3, 0 }, | |
46d14a58 | 175 | { INVALID, INVALID, WLAN_RC_PHY_OFDM, 6000, /* 6 Mb */ |
f078f209 LR |
176 | 5400, 0x0b, 0x00, 12, |
177 | 4, 2, 1, 4, 4, 4, 4, 0 }, | |
46d14a58 | 178 | { INVALID, INVALID, WLAN_RC_PHY_OFDM, 9000, /* 9 Mb */ |
f078f209 LR |
179 | 7800, 0x0f, 0x00, 18, |
180 | 4, 3, 1, 5, 5, 5, 5, 0 }, | |
46d14a58 | 181 | { VALID, VALID, WLAN_RC_PHY_OFDM, 12000, /* 12 Mb */ |
f078f209 LR |
182 | 10100, 0x0a, 0x00, 24, |
183 | 6, 4, 1, 6, 6, 6, 6, 0 }, | |
46d14a58 | 184 | { VALID, VALID, WLAN_RC_PHY_OFDM, 18000, /* 18 Mb */ |
f078f209 LR |
185 | 14100, 0x0e, 0x00, 36, |
186 | 6, 6, 2, 7, 7, 7, 7, 0 }, | |
46d14a58 | 187 | { VALID, VALID, WLAN_RC_PHY_OFDM, 24000, /* 24 Mb */ |
f078f209 LR |
188 | 17700, 0x09, 0x00, 48, |
189 | 8, 10, 3, 8, 8, 8, 8, 0 }, | |
46d14a58 | 190 | { VALID, VALID, WLAN_RC_PHY_OFDM, 36000, /* 36 Mb */ |
f078f209 LR |
191 | 23700, 0x0d, 0x00, 72, |
192 | 8, 14, 3, 9, 9, 9, 9, 0 }, | |
46d14a58 | 193 | { VALID, VALID, WLAN_RC_PHY_OFDM, 48000, /* 48 Mb */ |
f078f209 LR |
194 | 27400, 0x08, 0x00, 96, |
195 | 8, 20, 3, 10, 10, 10, 10, 0 }, | |
46d14a58 | 196 | { VALID, VALID, WLAN_RC_PHY_OFDM, 54000, /* 54 Mb */ |
f078f209 LR |
197 | 30900, 0x0c, 0x00, 108, |
198 | 8, 23, 3, 11, 11, 11, 11, 0 }, | |
46d14a58 | 199 | { INVALID, INVALID, WLAN_RC_PHY_HT_20_SS, 6500, /* 6.5 Mb */ |
f078f209 LR |
200 | 6400, 0x80, 0x00, 0, |
201 | 4, 2, 3, 12, 28, 12, 28, 3216 }, | |
46d14a58 | 202 | { VALID_20, VALID_20, WLAN_RC_PHY_HT_20_SS, 13000, /* 13 Mb */ |
f078f209 LR |
203 | 12700, 0x81, 0x00, 1, |
204 | 6, 4, 3, 13, 29, 13, 29, 6434 }, | |
46d14a58 | 205 | { VALID_20, VALID_20, WLAN_RC_PHY_HT_20_SS, 19500, /* 19.5 Mb */ |
f078f209 LR |
206 | 18800, 0x82, 0x00, 2, |
207 | 6, 6, 3, 14, 30, 14, 30, 9650 }, | |
46d14a58 | 208 | { VALID_20, VALID_20, WLAN_RC_PHY_HT_20_SS, 26000, /* 26 Mb */ |
f078f209 LR |
209 | 25000, 0x83, 0x00, 3, |
210 | 8, 10, 3, 15, 31, 15, 31, 12868 }, | |
46d14a58 | 211 | { VALID_20, VALID_20, WLAN_RC_PHY_HT_20_SS, 39000, /* 39 Mb */ |
f078f209 LR |
212 | 36700, 0x84, 0x00, 4, |
213 | 8, 14, 3, 16, 32, 16, 32, 19304 }, | |
46d14a58 | 214 | { INVALID, VALID_20, WLAN_RC_PHY_HT_20_SS, 52000, /* 52 Mb */ |
f078f209 LR |
215 | 48100, 0x85, 0x00, 5, |
216 | 8, 20, 3, 17, 33, 17, 33, 25740 }, | |
46d14a58 | 217 | { INVALID, VALID_20, WLAN_RC_PHY_HT_20_SS, 58500, /* 58.5 Mb */ |
f078f209 LR |
218 | 53500, 0x86, 0x00, 6, |
219 | 8, 23, 3, 18, 34, 18, 34, 28956 }, | |
46d14a58 | 220 | { INVALID, VALID_20, WLAN_RC_PHY_HT_20_SS, 65000, /* 65 Mb */ |
f078f209 LR |
221 | 59000, 0x87, 0x00, 7, |
222 | 8, 25, 3, 19, 35, 19, 36, 32180 }, | |
46d14a58 | 223 | { INVALID, INVALID, WLAN_RC_PHY_HT_20_DS, 13000, /* 13 Mb */ |
f078f209 LR |
224 | 12700, 0x88, 0x00, 8, |
225 | 4, 2, 3, 20, 37, 20, 37, 6430 }, | |
46d14a58 | 226 | { INVALID, INVALID, WLAN_RC_PHY_HT_20_DS, 26000, /* 26 Mb */ |
f078f209 LR |
227 | 24800, 0x89, 0x00, 9, |
228 | 6, 4, 3, 21, 38, 21, 38, 12860 }, | |
46d14a58 | 229 | { INVALID, INVALID, WLAN_RC_PHY_HT_20_DS, 39000, /* 39 Mb */ |
f078f209 LR |
230 | 36600, 0x8a, 0x00, 10, |
231 | 6, 6, 3, 22, 39, 22, 39, 19300 }, | |
46d14a58 | 232 | { VALID_20, INVALID, WLAN_RC_PHY_HT_20_DS, 52000, /* 52 Mb */ |
f078f209 LR |
233 | 48100, 0x8b, 0x00, 11, |
234 | 8, 10, 3, 23, 40, 23, 40, 25736 }, | |
46d14a58 | 235 | { VALID_20, INVALID, WLAN_RC_PHY_HT_20_DS, 78000, /* 78 Mb */ |
f078f209 LR |
236 | 69500, 0x8c, 0x00, 12, |
237 | 8, 14, 3, 24, 41, 24, 41, 38600 }, | |
46d14a58 | 238 | { VALID_20, INVALID, WLAN_RC_PHY_HT_20_DS, 104000, /* 104 Mb */ |
f078f209 LR |
239 | 89500, 0x8d, 0x00, 13, |
240 | 8, 20, 3, 25, 42, 25, 42, 51472 }, | |
46d14a58 | 241 | { VALID_20, INVALID, WLAN_RC_PHY_HT_20_DS, 117000, /* 117 Mb */ |
f078f209 LR |
242 | 98900, 0x8e, 0x00, 14, |
243 | 8, 23, 3, 26, 43, 26, 44, 57890 }, | |
46d14a58 | 244 | { VALID_20, INVALID, WLAN_RC_PHY_HT_20_DS, 130000, /* 130 Mb */ |
f078f209 LR |
245 | 108300, 0x8f, 0x00, 15, |
246 | 8, 25, 3, 27, 44, 27, 45, 64320 }, | |
46d14a58 | 247 | { VALID_40, VALID_40, WLAN_RC_PHY_HT_40_SS, 13500, /* 13.5 Mb */ |
f078f209 LR |
248 | 13200, 0x80, 0x00, 0, |
249 | 8, 2, 3, 12, 28, 28, 28, 6684 }, | |
46d14a58 | 250 | { VALID_40, VALID_40, WLAN_RC_PHY_HT_40_SS, 27500, /* 27.0 Mb */ |
f078f209 LR |
251 | 25900, 0x81, 0x00, 1, |
252 | 8, 4, 3, 13, 29, 29, 29, 13368 }, | |
46d14a58 | 253 | { VALID_40, VALID_40, WLAN_RC_PHY_HT_40_SS, 40500, /* 40.5 Mb */ |
f078f209 LR |
254 | 38600, 0x82, 0x00, 2, |
255 | 8, 6, 3, 14, 30, 30, 30, 20052 }, | |
46d14a58 | 256 | { VALID_40, VALID_40, WLAN_RC_PHY_HT_40_SS, 54000, /* 54 Mb */ |
f078f209 LR |
257 | 49800, 0x83, 0x00, 3, |
258 | 8, 10, 3, 15, 31, 31, 31, 26738 }, | |
46d14a58 | 259 | { VALID_40, VALID_40, WLAN_RC_PHY_HT_40_SS, 81500, /* 81 Mb */ |
f078f209 LR |
260 | 72200, 0x84, 0x00, 4, |
261 | 8, 14, 3, 16, 32, 32, 32, 40104 }, | |
46d14a58 | 262 | { INVALID, VALID_40, WLAN_RC_PHY_HT_40_SS, 108000, /* 108 Mb */ |
f078f209 LR |
263 | 92900, 0x85, 0x00, 5, |
264 | 8, 20, 3, 17, 33, 33, 33, 53476 }, | |
46d14a58 | 265 | { INVALID, VALID_40, WLAN_RC_PHY_HT_40_SS, 121500, /* 121.5 Mb */ |
f078f209 LR |
266 | 102700, 0x86, 0x00, 6, |
267 | 8, 23, 3, 18, 34, 34, 34, 60156 }, | |
46d14a58 | 268 | { INVALID, VALID_40, WLAN_RC_PHY_HT_40_SS, 135000, /* 135 Mb */ |
f078f209 LR |
269 | 112000, 0x87, 0x00, 7, |
270 | 8, 23, 3, 19, 35, 36, 36, 66840 }, | |
46d14a58 | 271 | { INVALID, VALID_40, WLAN_RC_PHY_HT_40_SS_HGI, 150000, /* 150 Mb */ |
f078f209 LR |
272 | 122000, 0x87, 0x00, 7, |
273 | 8, 25, 3, 19, 35, 36, 36, 74200 }, | |
46d14a58 | 274 | { INVALID, INVALID, WLAN_RC_PHY_HT_40_DS, 27000, /* 27 Mb */ |
f078f209 LR |
275 | 25800, 0x88, 0x00, 8, |
276 | 8, 2, 3, 20, 37, 37, 37, 13360 }, | |
46d14a58 | 277 | { INVALID, INVALID, WLAN_RC_PHY_HT_40_DS, 54000, /* 54 Mb */ |
f078f209 LR |
278 | 49800, 0x89, 0x00, 9, |
279 | 8, 4, 3, 21, 38, 38, 38, 26720 }, | |
46d14a58 | 280 | { INVALID, INVALID, WLAN_RC_PHY_HT_40_DS, 81000, /* 81 Mb */ |
f078f209 LR |
281 | 71900, 0x8a, 0x00, 10, |
282 | 8, 6, 3, 22, 39, 39, 39, 40080 }, | |
46d14a58 | 283 | { VALID_40, INVALID, WLAN_RC_PHY_HT_40_DS, 108000, /* 108 Mb */ |
f078f209 LR |
284 | 92500, 0x8b, 0x00, 11, |
285 | 8, 10, 3, 23, 40, 40, 40, 53440 }, | |
46d14a58 | 286 | { VALID_40, INVALID, WLAN_RC_PHY_HT_40_DS, 162000, /* 162 Mb */ |
f078f209 LR |
287 | 130300, 0x8c, 0x00, 12, |
288 | 8, 14, 3, 24, 41, 41, 41, 80160 }, | |
46d14a58 | 289 | { VALID_40, INVALID, WLAN_RC_PHY_HT_40_DS, 216000, /* 216 Mb */ |
f078f209 LR |
290 | 162800, 0x8d, 0x00, 13, |
291 | 8, 20, 3, 25, 42, 42, 42, 106880 }, | |
46d14a58 | 292 | { VALID_40, INVALID, WLAN_RC_PHY_HT_40_DS, 243000, /* 243 Mb */ |
f078f209 LR |
293 | 178200, 0x8e, 0x00, 14, |
294 | 8, 23, 3, 26, 43, 43, 43, 120240 }, | |
46d14a58 | 295 | { VALID_40, INVALID, WLAN_RC_PHY_HT_40_DS, 270000, /* 270 Mb */ |
f078f209 LR |
296 | 192100, 0x8f, 0x00, 15, |
297 | 8, 23, 3, 27, 44, 45, 45, 133600 }, | |
46d14a58 | 298 | { VALID_40, INVALID, WLAN_RC_PHY_HT_40_DS_HGI, 300000, /* 300 Mb */ |
f078f209 LR |
299 | 207000, 0x8f, 0x00, 15, |
300 | 8, 25, 3, 27, 44, 45, 45, 148400 }, | |
301 | }, | |
302 | 50, /* probe interval */ | |
303 | 50, /* rssi reduce interval */ | |
304 | WLAN_RC_HT_FLAG, /* Phy rates allowed initially */ | |
305 | }; | |
306 | ||
307 | static struct ath_rate_table ar5416_11a_ratetable = { | |
308 | 8, | |
e63835b0 | 309 | {0}, |
f078f209 | 310 | { |
46d14a58 | 311 | { VALID, VALID, WLAN_RC_PHY_OFDM, 6000, /* 6 Mb */ |
f078f209 LR |
312 | 5400, 0x0b, 0x00, (0x80|12), |
313 | 0, 2, 1, 0, 0 }, | |
46d14a58 | 314 | { VALID, VALID, WLAN_RC_PHY_OFDM, 9000, /* 9 Mb */ |
f078f209 LR |
315 | 7800, 0x0f, 0x00, 18, |
316 | 0, 3, 1, 1, 0 }, | |
46d14a58 | 317 | { VALID, VALID, WLAN_RC_PHY_OFDM, 12000, /* 12 Mb */ |
f078f209 LR |
318 | 10000, 0x0a, 0x00, (0x80|24), |
319 | 2, 4, 2, 2, 0 }, | |
46d14a58 | 320 | { VALID, VALID, WLAN_RC_PHY_OFDM, 18000, /* 18 Mb */ |
f078f209 LR |
321 | 13900, 0x0e, 0x00, 36, |
322 | 2, 6, 2, 3, 0 }, | |
46d14a58 | 323 | { VALID, VALID, WLAN_RC_PHY_OFDM, 24000, /* 24 Mb */ |
f078f209 LR |
324 | 17300, 0x09, 0x00, (0x80|48), |
325 | 4, 10, 3, 4, 0 }, | |
46d14a58 | 326 | { VALID, VALID, WLAN_RC_PHY_OFDM, 36000, /* 36 Mb */ |
f078f209 LR |
327 | 23000, 0x0d, 0x00, 72, |
328 | 4, 14, 3, 5, 0 }, | |
46d14a58 | 329 | { VALID, VALID, WLAN_RC_PHY_OFDM, 48000, /* 48 Mb */ |
f078f209 LR |
330 | 27400, 0x08, 0x00, 96, |
331 | 4, 19, 3, 6, 0 }, | |
46d14a58 | 332 | { VALID, VALID, WLAN_RC_PHY_OFDM, 54000, /* 54 Mb */ |
f078f209 LR |
333 | 29300, 0x0c, 0x00, 108, |
334 | 4, 23, 3, 7, 0 }, | |
335 | }, | |
336 | 50, /* probe interval */ | |
337 | 50, /* rssi reduce interval */ | |
338 | 0, /* Phy rates allowed initially */ | |
339 | }; | |
340 | ||
f078f209 LR |
341 | static struct ath_rate_table ar5416_11g_ratetable = { |
342 | 12, | |
e63835b0 | 343 | {0}, |
f078f209 | 344 | { |
46d14a58 | 345 | { VALID, VALID, WLAN_RC_PHY_CCK, 1000, /* 1 Mb */ |
f078f209 LR |
346 | 900, 0x1b, 0x00, 2, |
347 | 0, 0, 1, 0, 0 }, | |
46d14a58 | 348 | { VALID, VALID, WLAN_RC_PHY_CCK, 2000, /* 2 Mb */ |
f078f209 LR |
349 | 1900, 0x1a, 0x04, 4, |
350 | 1, 1, 1, 1, 0 }, | |
46d14a58 | 351 | { VALID, VALID, WLAN_RC_PHY_CCK, 5500, /* 5.5 Mb */ |
f078f209 LR |
352 | 4900, 0x19, 0x04, 11, |
353 | 2, 2, 2, 2, 0 }, | |
46d14a58 | 354 | { VALID, VALID, WLAN_RC_PHY_CCK, 11000, /* 11 Mb */ |
f078f209 LR |
355 | 8100, 0x18, 0x04, 22, |
356 | 3, 3, 2, 3, 0 }, | |
46d14a58 | 357 | { INVALID, INVALID, WLAN_RC_PHY_OFDM, 6000, /* 6 Mb */ |
f078f209 LR |
358 | 5400, 0x0b, 0x00, 12, |
359 | 4, 2, 1, 4, 0 }, | |
46d14a58 | 360 | { INVALID, INVALID, WLAN_RC_PHY_OFDM, 9000, /* 9 Mb */ |
f078f209 LR |
361 | 7800, 0x0f, 0x00, 18, |
362 | 4, 3, 1, 5, 0 }, | |
46d14a58 | 363 | { VALID, VALID, WLAN_RC_PHY_OFDM, 12000, /* 12 Mb */ |
f078f209 LR |
364 | 10000, 0x0a, 0x00, 24, |
365 | 6, 4, 1, 6, 0 }, | |
46d14a58 | 366 | { VALID, VALID, WLAN_RC_PHY_OFDM, 18000, /* 18 Mb */ |
f078f209 LR |
367 | 13900, 0x0e, 0x00, 36, |
368 | 6, 6, 2, 7, 0 }, | |
46d14a58 | 369 | { VALID, VALID, WLAN_RC_PHY_OFDM, 24000, /* 24 Mb */ |
f078f209 LR |
370 | 17300, 0x09, 0x00, 48, |
371 | 8, 10, 3, 8, 0 }, | |
46d14a58 | 372 | { VALID, VALID, WLAN_RC_PHY_OFDM, 36000, /* 36 Mb */ |
f078f209 LR |
373 | 23000, 0x0d, 0x00, 72, |
374 | 8, 14, 3, 9, 0 }, | |
46d14a58 | 375 | { VALID, VALID, WLAN_RC_PHY_OFDM, 48000, /* 48 Mb */ |
f078f209 LR |
376 | 27400, 0x08, 0x00, 96, |
377 | 8, 19, 3, 10, 0 }, | |
46d14a58 | 378 | { VALID, VALID, WLAN_RC_PHY_OFDM, 54000, /* 54 Mb */ |
f078f209 LR |
379 | 29300, 0x0c, 0x00, 108, |
380 | 8, 23, 3, 11, 0 }, | |
381 | }, | |
382 | 50, /* probe interval */ | |
383 | 50, /* rssi reduce interval */ | |
384 | 0, /* Phy rates allowed initially */ | |
385 | }; | |
386 | ||
387 | static struct ath_rate_table ar5416_11b_ratetable = { | |
388 | 4, | |
e63835b0 | 389 | {0}, |
f078f209 | 390 | { |
46d14a58 | 391 | { VALID, VALID, WLAN_RC_PHY_CCK, 1000, /* 1 Mb */ |
f078f209 LR |
392 | 900, 0x1b, 0x00, (0x80|2), |
393 | 0, 0, 1, 0, 0 }, | |
46d14a58 | 394 | { VALID, VALID, WLAN_RC_PHY_CCK, 2000, /* 2 Mb */ |
f078f209 LR |
395 | 1800, 0x1a, 0x04, (0x80|4), |
396 | 1, 1, 1, 1, 0 }, | |
46d14a58 | 397 | { VALID, VALID, WLAN_RC_PHY_CCK, 5500, /* 5.5 Mb */ |
f078f209 LR |
398 | 4300, 0x19, 0x04, (0x80|11), |
399 | 1, 2, 2, 2, 0 }, | |
46d14a58 | 400 | { VALID, VALID, WLAN_RC_PHY_CCK, 11000, /* 11 Mb */ |
f078f209 LR |
401 | 7100, 0x18, 0x04, (0x80|22), |
402 | 1, 4, 100, 3, 0 }, | |
403 | }, | |
404 | 100, /* probe interval */ | |
405 | 100, /* rssi reduce interval */ | |
406 | 0, /* Phy rates allowed initially */ | |
407 | }; | |
408 | ||
f078f209 LR |
409 | static inline int8_t median(int8_t a, int8_t b, int8_t c) |
410 | { | |
411 | if (a >= b) { | |
412 | if (b >= c) | |
413 | return b; | |
414 | else if (a > c) | |
415 | return c; | |
416 | else | |
417 | return a; | |
418 | } else { | |
419 | if (a >= c) | |
420 | return a; | |
421 | else if (b >= c) | |
422 | return c; | |
423 | else | |
424 | return b; | |
425 | } | |
426 | } | |
427 | ||
fe7f4a77 | 428 | static void ath_rc_sort_validrates(struct ath_rate_table *rate_table, |
46d14a58 | 429 | struct ath_rate_priv *ath_rc_priv) |
f078f209 LR |
430 | { |
431 | u8 i, j, idx, idx_next; | |
432 | ||
256b7759 | 433 | for (i = ath_rc_priv->max_valid_rate - 1; i > 0; i--) { |
f078f209 | 434 | for (j = 0; j <= i-1; j++) { |
256b7759 S |
435 | idx = ath_rc_priv->valid_rate_index[j]; |
436 | idx_next = ath_rc_priv->valid_rate_index[j+1]; | |
f078f209 LR |
437 | |
438 | if (rate_table->info[idx].ratekbps > | |
439 | rate_table->info[idx_next].ratekbps) { | |
256b7759 S |
440 | ath_rc_priv->valid_rate_index[j] = idx_next; |
441 | ath_rc_priv->valid_rate_index[j+1] = idx; | |
f078f209 LR |
442 | } |
443 | } | |
444 | } | |
445 | } | |
446 | ||
46d14a58 | 447 | static void ath_rc_init_valid_txmask(struct ath_rate_priv *ath_rc_priv) |
f078f209 LR |
448 | { |
449 | u8 i; | |
450 | ||
256b7759 | 451 | for (i = 0; i < ath_rc_priv->rate_table_size; i++) |
46d14a58 | 452 | ath_rc_priv->valid_rate_index[i] = 0; |
f078f209 LR |
453 | } |
454 | ||
46d14a58 | 455 | static inline void ath_rc_set_valid_txmask(struct ath_rate_priv *ath_rc_priv, |
f078f209 LR |
456 | u8 index, int valid_tx_rate) |
457 | { | |
256b7759 | 458 | ASSERT(index <= ath_rc_priv->rate_table_size); |
46d14a58 | 459 | ath_rc_priv->valid_rate_index[index] = valid_tx_rate ? 1 : 0; |
f078f209 LR |
460 | } |
461 | ||
46d14a58 | 462 | static inline int ath_rc_isvalid_txmask(struct ath_rate_priv *ath_rc_priv, |
f078f209 LR |
463 | u8 index) |
464 | { | |
256b7759 S |
465 | ASSERT(index <= ath_rc_priv->rate_table_size); |
466 | return ath_rc_priv->valid_rate_index[index]; | |
f078f209 LR |
467 | } |
468 | ||
2c5a744d S |
469 | static inline int ath_rc_get_nextvalid_txrate(struct ath_rate_table *rate_table, |
470 | struct ath_rate_priv *ath_rc_priv, | |
471 | u8 cur_valid_txrate, | |
472 | u8 *next_idx) | |
f078f209 LR |
473 | { |
474 | u8 i; | |
475 | ||
256b7759 S |
476 | for (i = 0; i < ath_rc_priv->max_valid_rate - 1; i++) { |
477 | if (ath_rc_priv->valid_rate_index[i] == cur_valid_txrate) { | |
478 | *next_idx = ath_rc_priv->valid_rate_index[i+1]; | |
46d14a58 | 479 | return 1; |
f078f209 LR |
480 | } |
481 | } | |
482 | ||
483 | /* No more valid rates */ | |
484 | *next_idx = 0; | |
2c5a744d | 485 | |
46d14a58 | 486 | return 0; |
f078f209 LR |
487 | } |
488 | ||
489 | /* Return true only for single stream */ | |
490 | ||
491 | static int ath_rc_valid_phyrate(u32 phy, u32 capflag, int ignore_cw) | |
492 | { | |
493 | if (WLAN_RC_PHY_HT(phy) & !(capflag & WLAN_RC_HT_FLAG)) | |
46d14a58 | 494 | return 0; |
f078f209 | 495 | if (WLAN_RC_PHY_DS(phy) && !(capflag & WLAN_RC_DS_FLAG)) |
46d14a58 | 496 | return 0; |
f078f209 | 497 | if (WLAN_RC_PHY_SGI(phy) && !(capflag & WLAN_RC_SGI_FLAG)) |
46d14a58 | 498 | return 0; |
f078f209 LR |
499 | if (!ignore_cw && WLAN_RC_PHY_HT(phy)) |
500 | if (WLAN_RC_PHY_40(phy) && !(capflag & WLAN_RC_40_FLAG)) | |
46d14a58 | 501 | return 0; |
f078f209 | 502 | if (!WLAN_RC_PHY_40(phy) && (capflag & WLAN_RC_40_FLAG)) |
46d14a58 S |
503 | return 0; |
504 | return 1; | |
f078f209 LR |
505 | } |
506 | ||
507 | static inline int | |
fe7f4a77 | 508 | ath_rc_get_nextlowervalid_txrate(struct ath_rate_table *rate_table, |
46d14a58 | 509 | struct ath_rate_priv *ath_rc_priv, |
f078f209 LR |
510 | u8 cur_valid_txrate, u8 *next_idx) |
511 | { | |
512 | int8_t i; | |
513 | ||
256b7759 S |
514 | for (i = 1; i < ath_rc_priv->max_valid_rate ; i++) { |
515 | if (ath_rc_priv->valid_rate_index[i] == cur_valid_txrate) { | |
516 | *next_idx = ath_rc_priv->valid_rate_index[i-1]; | |
46d14a58 | 517 | return 1; |
f078f209 LR |
518 | } |
519 | } | |
2c5a744d | 520 | |
46d14a58 | 521 | return 0; |
f078f209 LR |
522 | } |
523 | ||
2c5a744d S |
524 | static u8 ath_rc_init_validrates(struct ath_rate_priv *ath_rc_priv, |
525 | struct ath_rate_table *rate_table, | |
526 | u32 capflag) | |
f078f209 | 527 | { |
f078f209 LR |
528 | u8 i, hi = 0; |
529 | u32 valid; | |
530 | ||
f078f209 LR |
531 | for (i = 0; i < rate_table->rate_cnt; i++) { |
532 | valid = (ath_rc_priv->single_stream ? | |
dc2222a8 S |
533 | rate_table->info[i].valid_single_stream : |
534 | rate_table->info[i].valid); | |
46d14a58 | 535 | if (valid == 1) { |
f078f209 LR |
536 | u32 phy = rate_table->info[i].phy; |
537 | u8 valid_rate_count = 0; | |
538 | ||
46d14a58 | 539 | if (!ath_rc_valid_phyrate(phy, capflag, 0)) |
f078f209 LR |
540 | continue; |
541 | ||
256b7759 | 542 | valid_rate_count = ath_rc_priv->valid_phy_ratecnt[phy]; |
f078f209 | 543 | |
256b7759 S |
544 | ath_rc_priv->valid_phy_rateidx[phy][valid_rate_count] = i; |
545 | ath_rc_priv->valid_phy_ratecnt[phy] += 1; | |
46d14a58 | 546 | ath_rc_set_valid_txmask(ath_rc_priv, i, 1); |
f078f209 LR |
547 | hi = A_MAX(hi, i); |
548 | } | |
549 | } | |
2c5a744d | 550 | |
f078f209 LR |
551 | return hi; |
552 | } | |
553 | ||
2c5a744d S |
554 | static u8 ath_rc_setvalid_rates(struct ath_rate_priv *ath_rc_priv, |
555 | struct ath_rate_table *rate_table, | |
556 | struct ath_rateset *rateset, | |
557 | u32 capflag) | |
f078f209 | 558 | { |
f078f209 | 559 | u8 i, j, hi = 0; |
f078f209 LR |
560 | |
561 | /* Use intersection of working rates and valid rates */ | |
562 | for (i = 0; i < rateset->rs_nrates; i++) { | |
563 | for (j = 0; j < rate_table->rate_cnt; j++) { | |
564 | u32 phy = rate_table->info[j].phy; | |
565 | u32 valid = (ath_rc_priv->single_stream ? | |
566 | rate_table->info[j].valid_single_stream : | |
567 | rate_table->info[j].valid); | |
2c5a744d S |
568 | u8 rate = rateset->rs_rates[i]; |
569 | u8 dot11rate = rate_table->info[j].dot11rate; | |
f078f209 LR |
570 | |
571 | /* We allow a rate only if its valid and the | |
572 | * capflag matches one of the validity | |
46d14a58 | 573 | * (VALID/VALID_20/VALID_40) flags */ |
f078f209 | 574 | |
2c5a744d S |
575 | if (((rate & 0x7F) == (dot11rate & 0x7F)) && |
576 | ((valid & WLAN_RC_CAP_MODE(capflag)) == | |
577 | WLAN_RC_CAP_MODE(capflag)) && | |
578 | !WLAN_RC_PHY_HT(phy)) { | |
f078f209 LR |
579 | u8 valid_rate_count = 0; |
580 | ||
46d14a58 | 581 | if (!ath_rc_valid_phyrate(phy, capflag, 0)) |
f078f209 LR |
582 | continue; |
583 | ||
584 | valid_rate_count = | |
256b7759 | 585 | ath_rc_priv->valid_phy_ratecnt[phy]; |
f078f209 | 586 | |
256b7759 | 587 | ath_rc_priv->valid_phy_rateidx[phy] |
f078f209 | 588 | [valid_rate_count] = j; |
256b7759 | 589 | ath_rc_priv->valid_phy_ratecnt[phy] += 1; |
46d14a58 | 590 | ath_rc_set_valid_txmask(ath_rc_priv, j, 1); |
f078f209 LR |
591 | hi = A_MAX(hi, j); |
592 | } | |
593 | } | |
594 | } | |
2c5a744d | 595 | |
f078f209 LR |
596 | return hi; |
597 | } | |
598 | ||
2c5a744d S |
599 | static u8 ath_rc_setvalid_htrates(struct ath_rate_priv *ath_rc_priv, |
600 | struct ath_rate_table *rate_table, | |
601 | u8 *mcs_set, u32 capflag) | |
f078f209 | 602 | { |
2c5a744d S |
603 | struct ath_rateset *rateset = (struct ath_rateset *)mcs_set; |
604 | ||
f078f209 | 605 | u8 i, j, hi = 0; |
f078f209 LR |
606 | |
607 | /* Use intersection of working rates and valid rates */ | |
2c5a744d | 608 | for (i = 0; i < rateset->rs_nrates; i++) { |
f078f209 LR |
609 | for (j = 0; j < rate_table->rate_cnt; j++) { |
610 | u32 phy = rate_table->info[j].phy; | |
611 | u32 valid = (ath_rc_priv->single_stream ? | |
dc2222a8 S |
612 | rate_table->info[j].valid_single_stream : |
613 | rate_table->info[j].valid); | |
2c5a744d S |
614 | u8 rate = rateset->rs_rates[i]; |
615 | u8 dot11rate = rate_table->info[j].dot11rate; | |
f078f209 | 616 | |
2c5a744d | 617 | if (((rate & 0x7F) != (dot11rate & 0x7F)) || |
dc2222a8 S |
618 | !WLAN_RC_PHY_HT(phy) || |
619 | !WLAN_RC_PHY_HT_VALID(valid, capflag)) | |
f078f209 LR |
620 | continue; |
621 | ||
46d14a58 | 622 | if (!ath_rc_valid_phyrate(phy, capflag, 0)) |
f078f209 LR |
623 | continue; |
624 | ||
256b7759 S |
625 | ath_rc_priv->valid_phy_rateidx[phy] |
626 | [ath_rc_priv->valid_phy_ratecnt[phy]] = j; | |
627 | ath_rc_priv->valid_phy_ratecnt[phy] += 1; | |
46d14a58 | 628 | ath_rc_set_valid_txmask(ath_rc_priv, j, 1); |
f078f209 LR |
629 | hi = A_MAX(hi, j); |
630 | } | |
631 | } | |
f078f209 | 632 | |
2c5a744d | 633 | return hi; |
f078f209 LR |
634 | } |
635 | ||
f078f209 | 636 | static u8 ath_rc_ratefind_ht(struct ath_softc *sc, |
46d14a58 | 637 | struct ath_rate_priv *ath_rc_priv, |
fe7f4a77 | 638 | struct ath_rate_table *rate_table, |
dc2222a8 S |
639 | int probe_allowed, int *is_probing, |
640 | int is_retry) | |
f078f209 LR |
641 | { |
642 | u32 dt, best_thruput, this_thruput, now_msec; | |
643 | u8 rate, next_rate, best_rate, maxindex, minindex; | |
644 | int8_t rssi_last, rssi_reduce = 0, index = 0; | |
f078f209 | 645 | |
46d14a58 | 646 | *is_probing = 0; |
f078f209 | 647 | |
256b7759 S |
648 | rssi_last = median(ath_rc_priv->rssi_last, |
649 | ath_rc_priv->rssi_last_prev, | |
650 | ath_rc_priv->rssi_last_prev2); | |
f078f209 LR |
651 | |
652 | /* | |
653 | * Age (reduce) last ack rssi based on how old it is. | |
654 | * The bizarre numbers are so the delta is 160msec, | |
655 | * meaning we divide by 16. | |
656 | * 0msec <= dt <= 25msec: don't derate | |
657 | * 25msec <= dt <= 185msec: derate linearly from 0 to 10dB | |
658 | * 185msec <= dt: derate by 10dB | |
659 | */ | |
660 | ||
661 | now_msec = jiffies_to_msecs(jiffies); | |
256b7759 | 662 | dt = now_msec - ath_rc_priv->rssi_time; |
f078f209 LR |
663 | |
664 | if (dt >= 185) | |
665 | rssi_reduce = 10; | |
666 | else if (dt >= 25) | |
667 | rssi_reduce = (u8)((dt - 25) >> 4); | |
668 | ||
669 | /* Now reduce rssi_last by rssi_reduce */ | |
670 | if (rssi_last < rssi_reduce) | |
671 | rssi_last = 0; | |
672 | else | |
673 | rssi_last -= rssi_reduce; | |
674 | ||
675 | /* | |
676 | * Now look up the rate in the rssi table and return it. | |
677 | * If no rates match then we return 0 (lowest rate) | |
678 | */ | |
679 | ||
680 | best_thruput = 0; | |
256b7759 | 681 | maxindex = ath_rc_priv->max_valid_rate-1; |
f078f209 LR |
682 | |
683 | minindex = 0; | |
684 | best_rate = minindex; | |
685 | ||
686 | /* | |
687 | * Try the higher rate first. It will reduce memory moving time | |
688 | * if we have very good channel characteristics. | |
689 | */ | |
690 | for (index = maxindex; index >= minindex ; index--) { | |
691 | u8 per_thres; | |
692 | ||
256b7759 S |
693 | rate = ath_rc_priv->valid_rate_index[index]; |
694 | if (rate > ath_rc_priv->rate_max_phy) | |
f078f209 LR |
695 | continue; |
696 | ||
697 | /* | |
698 | * For TCP the average collision rate is around 11%, | |
699 | * so we ignore PERs less than this. This is to | |
700 | * prevent the rate we are currently using (whose | |
701 | * PER might be in the 10-15 range because of TCP | |
702 | * collisions) looking worse than the next lower | |
703 | * rate whose PER has decayed close to 0. If we | |
704 | * used to next lower rate, its PER would grow to | |
705 | * 10-15 and we would be worse off then staying | |
706 | * at the current rate. | |
707 | */ | |
256b7759 | 708 | per_thres = ath_rc_priv->state[rate].per; |
f078f209 LR |
709 | if (per_thres < 12) |
710 | per_thres = 12; | |
711 | ||
712 | this_thruput = rate_table->info[rate].user_ratekbps * | |
713 | (100 - per_thres); | |
714 | ||
715 | if (best_thruput <= this_thruput) { | |
716 | best_thruput = this_thruput; | |
717 | best_rate = rate; | |
718 | } | |
719 | } | |
720 | ||
721 | rate = best_rate; | |
722 | ||
723 | /* if we are retrying for more than half the number | |
724 | * of max retries, use the min rate for the next retry | |
725 | */ | |
726 | if (is_retry) | |
256b7759 | 727 | rate = ath_rc_priv->valid_rate_index[minindex]; |
f078f209 | 728 | |
256b7759 | 729 | ath_rc_priv->rssi_last_lookup = rssi_last; |
f078f209 LR |
730 | |
731 | /* | |
732 | * Must check the actual rate (ratekbps) to account for | |
733 | * non-monoticity of 11g's rate table | |
734 | */ | |
735 | ||
256b7759 S |
736 | if (rate >= ath_rc_priv->rate_max_phy && probe_allowed) { |
737 | rate = ath_rc_priv->rate_max_phy; | |
f078f209 LR |
738 | |
739 | /* Probe the next allowed phy state */ | |
740 | /* FIXME:XXXX Check to make sure ratMax is checked properly */ | |
741 | if (ath_rc_get_nextvalid_txrate(rate_table, | |
256b7759 S |
742 | ath_rc_priv, rate, &next_rate) && |
743 | (now_msec - ath_rc_priv->probe_time > | |
f078f209 | 744 | rate_table->probe_interval) && |
256b7759 | 745 | (ath_rc_priv->hw_maxretry_pktcnt >= 1)) { |
f078f209 | 746 | rate = next_rate; |
256b7759 S |
747 | ath_rc_priv->probe_rate = rate; |
748 | ath_rc_priv->probe_time = now_msec; | |
749 | ath_rc_priv->hw_maxretry_pktcnt = 0; | |
46d14a58 | 750 | *is_probing = 1; |
f078f209 LR |
751 | } |
752 | } | |
753 | ||
256b7759 S |
754 | if (rate > (ath_rc_priv->rate_table_size - 1)) |
755 | rate = ath_rc_priv->rate_table_size - 1; | |
f078f209 LR |
756 | |
757 | ASSERT((rate_table->info[rate].valid && !ath_rc_priv->single_stream) || | |
dc2222a8 S |
758 | (rate_table->info[rate].valid_single_stream && |
759 | ath_rc_priv->single_stream)); | |
f078f209 LR |
760 | |
761 | return rate; | |
762 | } | |
763 | ||
fe7f4a77 | 764 | static void ath_rc_rate_set_series(struct ath_rate_table *rate_table , |
a8efee4f | 765 | struct ieee80211_tx_rate *rate, |
2c5a744d | 766 | u8 tries, u8 rix, int rtsctsenable) |
f078f209 | 767 | { |
a8efee4f S |
768 | rate->count = tries; |
769 | rate->idx = rix; | |
770 | ||
771 | if (rtsctsenable) | |
772 | rate->flags |= IEEE80211_TX_RC_USE_RTS_CTS; | |
773 | if (WLAN_RC_PHY_40(rate_table->info[rix].phy)) | |
774 | rate->flags |= IEEE80211_TX_RC_40_MHZ_WIDTH; | |
775 | if (WLAN_RC_PHY_SGI(rate_table->info[rix].phy)) | |
776 | rate->flags |= IEEE80211_TX_RC_SHORT_GI; | |
777 | if (WLAN_RC_PHY_HT(rate_table->info[rix].phy)) | |
778 | rate->flags |= IEEE80211_TX_RC_MCS; | |
f078f209 LR |
779 | } |
780 | ||
781 | static u8 ath_rc_rate_getidx(struct ath_softc *sc, | |
46d14a58 | 782 | struct ath_rate_priv *ath_rc_priv, |
fe7f4a77 | 783 | struct ath_rate_table *rate_table, |
dc2222a8 S |
784 | u8 rix, u16 stepdown, |
785 | u16 min_rate) | |
f078f209 LR |
786 | { |
787 | u32 j; | |
788 | u8 nextindex; | |
f078f209 LR |
789 | |
790 | if (min_rate) { | |
791 | for (j = RATE_TABLE_SIZE; j > 0; j--) { | |
792 | if (ath_rc_get_nextlowervalid_txrate(rate_table, | |
256b7759 | 793 | ath_rc_priv, rix, &nextindex)) |
f078f209 LR |
794 | rix = nextindex; |
795 | else | |
796 | break; | |
797 | } | |
798 | } else { | |
799 | for (j = stepdown; j > 0; j--) { | |
800 | if (ath_rc_get_nextlowervalid_txrate(rate_table, | |
256b7759 | 801 | ath_rc_priv, rix, &nextindex)) |
f078f209 LR |
802 | rix = nextindex; |
803 | else | |
804 | break; | |
805 | } | |
806 | } | |
807 | return rix; | |
808 | } | |
809 | ||
810 | static void ath_rc_ratefind(struct ath_softc *sc, | |
46d14a58 S |
811 | struct ath_rate_priv *ath_rc_priv, |
812 | int num_tries, int num_rates, | |
a8efee4f | 813 | struct ieee80211_tx_info *tx_info, int *is_probe, |
f078f209 LR |
814 | int is_retry) |
815 | { | |
816 | u8 try_per_rate = 0, i = 0, rix, nrix; | |
f078f209 | 817 | struct ath_rate_table *rate_table; |
a8efee4f | 818 | struct ieee80211_tx_rate *rates = tx_info->control.rates; |
f078f209 | 819 | |
fe7f4a77 | 820 | rate_table = sc->hw_rate_table[sc->sc_curmode]; |
46d14a58 | 821 | rix = ath_rc_ratefind_ht(sc, ath_rc_priv, rate_table, 1, |
dc2222a8 | 822 | is_probe, is_retry); |
f078f209 LR |
823 | nrix = rix; |
824 | ||
46d14a58 | 825 | if (*is_probe) { |
f078f209 LR |
826 | /* set one try for probe rates. For the |
827 | * probes don't enable rts */ | |
828 | ath_rc_rate_set_series(rate_table, | |
46d14a58 | 829 | &rates[i++], 1, nrix, 0); |
f078f209 LR |
830 | |
831 | try_per_rate = (num_tries/num_rates); | |
832 | /* Get the next tried/allowed rate. No RTS for the next series | |
833 | * after the probe rate | |
834 | */ | |
835 | nrix = ath_rc_rate_getidx(sc, | |
46d14a58 | 836 | ath_rc_priv, rate_table, nrix, 1, 0); |
f078f209 | 837 | ath_rc_rate_set_series(rate_table, |
a8efee4f | 838 | &rates[i++], try_per_rate, nrix, 0); |
f078f209 LR |
839 | } else { |
840 | try_per_rate = (num_tries/num_rates); | |
841 | /* Set the choosen rate. No RTS for first series entry. */ | |
842 | ath_rc_rate_set_series(rate_table, | |
46d14a58 | 843 | &rates[i++], try_per_rate, nrix, 0); |
f078f209 LR |
844 | } |
845 | ||
846 | /* Fill in the other rates for multirate retry */ | |
847 | for ( ; i < num_rates; i++) { | |
848 | u8 try_num; | |
849 | u8 min_rate; | |
850 | ||
851 | try_num = ((i + 1) == num_rates) ? | |
852 | num_tries - (try_per_rate * i) : try_per_rate ; | |
46d14a58 | 853 | min_rate = (((i + 1) == num_rates) && 0); |
f078f209 LR |
854 | |
855 | nrix = ath_rc_rate_getidx(sc, ath_rc_priv, | |
dc2222a8 | 856 | rate_table, nrix, 1, min_rate); |
f078f209 LR |
857 | /* All other rates in the series have RTS enabled */ |
858 | ath_rc_rate_set_series(rate_table, | |
46d14a58 | 859 | &rates[i], try_num, nrix, 1); |
f078f209 LR |
860 | } |
861 | ||
862 | /* | |
863 | * NB:Change rate series to enable aggregation when operating | |
864 | * at lower MCS rates. When first rate in series is MCS2 | |
865 | * in HT40 @ 2.4GHz, series should look like: | |
866 | * | |
867 | * {MCS2, MCS1, MCS0, MCS0}. | |
868 | * | |
869 | * When first rate in series is MCS3 in HT20 @ 2.4GHz, series should | |
870 | * look like: | |
871 | * | |
872 | * {MCS3, MCS2, MCS1, MCS1} | |
873 | * | |
874 | * So, set fourth rate in series to be same as third one for | |
875 | * above conditions. | |
876 | */ | |
86b89eed | 877 | if ((sc->sc_curmode == ATH9K_MODE_11NG_HT20) || |
dc2222a8 S |
878 | (sc->sc_curmode == ATH9K_MODE_11NG_HT40PLUS) || |
879 | (sc->sc_curmode == ATH9K_MODE_11NG_HT40MINUS)) { | |
f078f209 LR |
880 | u8 dot11rate = rate_table->info[rix].dot11rate; |
881 | u8 phy = rate_table->info[rix].phy; | |
882 | if (i == 4 && | |
883 | ((dot11rate == 2 && phy == WLAN_RC_PHY_HT_40_SS) || | |
dc2222a8 | 884 | (dot11rate == 3 && phy == WLAN_RC_PHY_HT_20_SS))) { |
a8efee4f S |
885 | rates[3].idx = rates[2].idx; |
886 | rates[3].flags = rates[2].flags; | |
f078f209 LR |
887 | } |
888 | } | |
889 | } | |
890 | ||
2c5a744d S |
891 | static bool ath_rc_update_per(struct ath_softc *sc, |
892 | struct ath_rate_table *rate_table, | |
893 | struct ath_rate_priv *ath_rc_priv, | |
894 | struct ath_tx_info_priv *tx_info_priv, | |
895 | int tx_rate, int xretries, int retries, | |
896 | u32 now_msec) | |
f078f209 | 897 | { |
2c5a744d S |
898 | bool state_change = false; |
899 | int count; | |
f078f209 | 900 | u8 last_per; |
f078f209 LR |
901 | static u32 nretry_to_per_lookup[10] = { |
902 | 100 * 0 / 1, | |
903 | 100 * 1 / 4, | |
904 | 100 * 1 / 2, | |
905 | 100 * 3 / 4, | |
906 | 100 * 4 / 5, | |
907 | 100 * 5 / 6, | |
908 | 100 * 6 / 7, | |
909 | 100 * 7 / 8, | |
910 | 100 * 8 / 9, | |
911 | 100 * 9 / 10 | |
912 | }; | |
913 | ||
256b7759 | 914 | last_per = ath_rc_priv->state[tx_rate].per; |
f078f209 LR |
915 | |
916 | if (xretries) { | |
f078f209 | 917 | if (xretries == 1) { |
256b7759 S |
918 | ath_rc_priv->state[tx_rate].per += 30; |
919 | if (ath_rc_priv->state[tx_rate].per > 100) | |
920 | ath_rc_priv->state[tx_rate].per = 100; | |
f078f209 LR |
921 | } else { |
922 | /* xretries == 2 */ | |
87c1687d | 923 | count = ARRAY_SIZE(nretry_to_per_lookup); |
f078f209 LR |
924 | if (retries >= count) |
925 | retries = count - 1; | |
2c5a744d | 926 | |
f078f209 | 927 | /* new_PER = 7/8*old_PER + 1/8*(currentPER) */ |
256b7759 | 928 | ath_rc_priv->state[tx_rate].per = |
2c5a744d | 929 | (u8)(last_per - (last_per >> 3) + (100 >> 3)); |
f078f209 LR |
930 | } |
931 | ||
932 | /* xretries == 1 or 2 */ | |
933 | ||
256b7759 S |
934 | if (ath_rc_priv->probe_rate == tx_rate) |
935 | ath_rc_priv->probe_rate = 0; | |
f078f209 | 936 | |
2c5a744d | 937 | } else { /* xretries == 0 */ |
87c1687d | 938 | count = ARRAY_SIZE(nretry_to_per_lookup); |
f078f209 LR |
939 | if (retries >= count) |
940 | retries = count - 1; | |
2c5a744d | 941 | |
46d14a58 | 942 | if (tx_info_priv->n_bad_frames) { |
dc2222a8 | 943 | /* new_PER = 7/8*old_PER + 1/8*(currentPER) |
f078f209 LR |
944 | * Assuming that n_frames is not 0. The current PER |
945 | * from the retries is 100 * retries / (retries+1), | |
946 | * since the first retries attempts failed, and the | |
947 | * next one worked. For the one that worked, | |
948 | * n_bad_frames subframes out of n_frames wored, | |
949 | * so the PER for that part is | |
950 | * 100 * n_bad_frames / n_frames, and it contributes | |
951 | * 100 * n_bad_frames / (n_frames * (retries+1)) to | |
952 | * the above PER. The expression below is a | |
953 | * simplified version of the sum of these two terms. | |
954 | */ | |
2c5a744d S |
955 | if (tx_info_priv->n_frames > 0) { |
956 | int n_frames, n_bad_frames; | |
957 | u8 cur_per, new_per; | |
958 | ||
959 | n_bad_frames = retries * tx_info_priv->n_frames + | |
960 | tx_info_priv->n_bad_frames; | |
961 | n_frames = tx_info_priv->n_frames * (retries + 1); | |
962 | cur_per = (100 * n_bad_frames / n_frames) >> 3; | |
963 | new_per = (u8)(last_per - (last_per >> 3) + cur_per); | |
964 | ath_rc_priv->state[tx_rate].per = new_per; | |
965 | } | |
f078f209 | 966 | } else { |
2c5a744d S |
967 | ath_rc_priv->state[tx_rate].per = |
968 | (u8)(last_per - (last_per >> 3) + | |
969 | (nretry_to_per_lookup[retries] >> 3)); | |
f078f209 LR |
970 | } |
971 | ||
256b7759 S |
972 | ath_rc_priv->rssi_last_prev2 = ath_rc_priv->rssi_last_prev; |
973 | ath_rc_priv->rssi_last_prev = ath_rc_priv->rssi_last; | |
46d14a58 | 974 | ath_rc_priv->rssi_last = tx_info_priv->tx.ts_rssi; |
256b7759 | 975 | ath_rc_priv->rssi_time = now_msec; |
f078f209 LR |
976 | |
977 | /* | |
978 | * If we got at most one retry then increase the max rate if | |
979 | * this was a probe. Otherwise, ignore the probe. | |
980 | */ | |
256b7759 | 981 | if (ath_rc_priv->probe_rate && ath_rc_priv->probe_rate == tx_rate) { |
46d14a58 S |
982 | if (retries > 0 || 2 * tx_info_priv->n_bad_frames > |
983 | tx_info_priv->n_frames) { | |
f078f209 LR |
984 | /* |
985 | * Since we probed with just a single attempt, | |
986 | * any retries means the probe failed. Also, | |
987 | * if the attempt worked, but more than half | |
988 | * the subframes were bad then also consider | |
989 | * the probe a failure. | |
990 | */ | |
256b7759 | 991 | ath_rc_priv->probe_rate = 0; |
f078f209 LR |
992 | } else { |
993 | u8 probe_rate = 0; | |
994 | ||
2c5a744d S |
995 | ath_rc_priv->rate_max_phy = |
996 | ath_rc_priv->probe_rate; | |
256b7759 | 997 | probe_rate = ath_rc_priv->probe_rate; |
f078f209 | 998 | |
256b7759 S |
999 | if (ath_rc_priv->state[probe_rate].per > 30) |
1000 | ath_rc_priv->state[probe_rate].per = 20; | |
f078f209 | 1001 | |
256b7759 | 1002 | ath_rc_priv->probe_rate = 0; |
f078f209 LR |
1003 | |
1004 | /* | |
1005 | * Since this probe succeeded, we allow the next | |
1006 | * probe twice as soon. This allows the maxRate | |
1007 | * to move up faster if the probes are | |
1008 | * succesful. | |
1009 | */ | |
2c5a744d S |
1010 | ath_rc_priv->probe_time = |
1011 | now_msec - rate_table->probe_interval / 2; | |
f078f209 LR |
1012 | } |
1013 | } | |
1014 | ||
1015 | if (retries > 0) { | |
1016 | /* | |
1017 | * Don't update anything. We don't know if | |
1018 | * this was because of collisions or poor signal. | |
1019 | * | |
1020 | * Later: if rssi_ack is close to | |
256b7759 | 1021 | * ath_rc_priv->state[txRate].rssi_thres and we see lots |
f078f209 | 1022 | * of retries, then we could increase |
256b7759 | 1023 | * ath_rc_priv->state[txRate].rssi_thres. |
f078f209 | 1024 | */ |
256b7759 | 1025 | ath_rc_priv->hw_maxretry_pktcnt = 0; |
f078f209 | 1026 | } else { |
2c5a744d S |
1027 | int32_t rssi_ackAvg; |
1028 | int8_t rssi_thres; | |
1029 | int8_t rssi_ack_vmin; | |
1030 | ||
f078f209 LR |
1031 | /* |
1032 | * It worked with no retries. First ignore bogus (small) | |
1033 | * rssi_ack values. | |
1034 | */ | |
256b7759 S |
1035 | if (tx_rate == ath_rc_priv->rate_max_phy && |
1036 | ath_rc_priv->hw_maxretry_pktcnt < 255) { | |
1037 | ath_rc_priv->hw_maxretry_pktcnt++; | |
f078f209 LR |
1038 | } |
1039 | ||
2c5a744d S |
1040 | if (tx_info_priv->tx.ts_rssi < |
1041 | rate_table->info[tx_rate].rssi_ack_validmin) | |
1042 | goto exit; | |
f078f209 | 1043 | |
2c5a744d S |
1044 | /* Average the rssi */ |
1045 | if (tx_rate != ath_rc_priv->rssi_sum_rate) { | |
1046 | ath_rc_priv->rssi_sum_rate = tx_rate; | |
1047 | ath_rc_priv->rssi_sum = | |
1048 | ath_rc_priv->rssi_sum_cnt = 0; | |
1049 | } | |
1050 | ||
1051 | ath_rc_priv->rssi_sum += tx_info_priv->tx.ts_rssi; | |
1052 | ath_rc_priv->rssi_sum_cnt++; | |
1053 | ||
1054 | if (ath_rc_priv->rssi_sum_cnt < 4) | |
1055 | goto exit; | |
1056 | ||
1057 | rssi_ackAvg = | |
1058 | (ath_rc_priv->rssi_sum + 2) / 4; | |
1059 | rssi_thres = | |
1060 | ath_rc_priv->state[tx_rate].rssi_thres; | |
1061 | rssi_ack_vmin = | |
1062 | rate_table->info[tx_rate].rssi_ack_validmin; | |
1063 | ||
1064 | ath_rc_priv->rssi_sum = | |
1065 | ath_rc_priv->rssi_sum_cnt = 0; | |
1066 | ||
1067 | /* Now reduce the current rssi threshold */ | |
1068 | if ((rssi_ackAvg < rssi_thres + 2) && | |
1069 | (rssi_thres > rssi_ack_vmin)) { | |
1070 | ath_rc_priv->state[tx_rate].rssi_thres--; | |
f078f209 | 1071 | } |
2c5a744d S |
1072 | |
1073 | state_change = true; | |
f078f209 LR |
1074 | } |
1075 | } | |
2c5a744d S |
1076 | exit: |
1077 | return state_change; | |
1078 | } | |
1079 | ||
1080 | /* Update PER, RSSI and whatever else that the code thinks it is doing. | |
1081 | If you can make sense of all this, you really need to go out more. */ | |
1082 | ||
1083 | static void ath_rc_update_ht(struct ath_softc *sc, | |
1084 | struct ath_rate_priv *ath_rc_priv, | |
1085 | struct ath_tx_info_priv *tx_info_priv, | |
1086 | int tx_rate, int xretries, int retries) | |
1087 | { | |
1088 | #define CHK_RSSI(rate) \ | |
1089 | ((ath_rc_priv->state[(rate)].rssi_thres + \ | |
1090 | rate_table->info[(rate)].rssi_ack_deltamin) > \ | |
1091 | ath_rc_priv->state[(rate)+1].rssi_thres) | |
1092 | ||
1093 | u32 now_msec = jiffies_to_msecs(jiffies); | |
1094 | int rate; | |
1095 | u8 last_per; | |
1096 | bool state_change = false; | |
1097 | struct ath_rate_table *rate_table = sc->hw_rate_table[sc->sc_curmode]; | |
1098 | int size = ath_rc_priv->rate_table_size; | |
1099 | ||
1100 | if ((tx_rate < 0) || (tx_rate > rate_table->rate_cnt)) | |
1101 | return; | |
f078f209 | 1102 | |
2c5a744d S |
1103 | /* To compensate for some imbalance between ctrl and ext. channel */ |
1104 | ||
1105 | if (WLAN_RC_PHY_40(rate_table->info[tx_rate].phy)) | |
1106 | tx_info_priv->tx.ts_rssi = | |
1107 | tx_info_priv->tx.ts_rssi < 3 ? 0 : | |
1108 | tx_info_priv->tx.ts_rssi - 3; | |
1109 | ||
1110 | last_per = ath_rc_priv->state[tx_rate].per; | |
1111 | ||
1112 | /* Update PER first */ | |
1113 | state_change = ath_rc_update_per(sc, rate_table, ath_rc_priv, | |
1114 | tx_info_priv, tx_rate, xretries, | |
1115 | retries, now_msec); | |
f078f209 LR |
1116 | |
1117 | /* | |
1118 | * If this rate looks bad (high PER) then stop using it for | |
1119 | * a while (except if we are probing). | |
1120 | */ | |
256b7759 | 1121 | if (ath_rc_priv->state[tx_rate].per >= 55 && tx_rate > 0 && |
dc2222a8 | 1122 | rate_table->info[tx_rate].ratekbps <= |
256b7759 S |
1123 | rate_table->info[ath_rc_priv->rate_max_phy].ratekbps) { |
1124 | ath_rc_get_nextlowervalid_txrate(rate_table, ath_rc_priv, | |
2c5a744d | 1125 | (u8)tx_rate, &ath_rc_priv->rate_max_phy); |
f078f209 LR |
1126 | |
1127 | /* Don't probe for a little while. */ | |
256b7759 | 1128 | ath_rc_priv->probe_time = now_msec; |
f078f209 LR |
1129 | } |
1130 | ||
1131 | if (state_change) { | |
1132 | /* | |
1133 | * Make sure the rates above this have higher rssi thresholds. | |
1134 | * (Note: Monotonicity is kept within the OFDM rates and | |
1135 | * within the CCK rates. However, no adjustment is | |
1136 | * made to keep the rssi thresholds monotonically | |
1137 | * increasing between the CCK and OFDM rates.) | |
1138 | */ | |
2c5a744d | 1139 | for (rate = tx_rate; rate < size - 1; rate++) { |
f078f209 | 1140 | if (rate_table->info[rate+1].phy != |
2c5a744d | 1141 | rate_table->info[tx_rate].phy) |
f078f209 LR |
1142 | break; |
1143 | ||
2c5a744d | 1144 | if (CHK_RSSI(rate)) { |
256b7759 | 1145 | ath_rc_priv->state[rate+1].rssi_thres = |
2c5a744d S |
1146 | ath_rc_priv->state[rate].rssi_thres + |
1147 | rate_table->info[rate].rssi_ack_deltamin; | |
f078f209 LR |
1148 | } |
1149 | } | |
1150 | ||
1151 | /* Make sure the rates below this have lower rssi thresholds. */ | |
1152 | for (rate = tx_rate - 1; rate >= 0; rate--) { | |
1153 | if (rate_table->info[rate].phy != | |
dc2222a8 | 1154 | rate_table->info[tx_rate].phy) |
f078f209 LR |
1155 | break; |
1156 | ||
2c5a744d | 1157 | if (CHK_RSSI(rate)) { |
256b7759 | 1158 | if (ath_rc_priv->state[rate+1].rssi_thres < |
2c5a744d | 1159 | rate_table->info[rate].rssi_ack_deltamin) |
256b7759 | 1160 | ath_rc_priv->state[rate].rssi_thres = 0; |
f078f209 | 1161 | else { |
256b7759 | 1162 | ath_rc_priv->state[rate].rssi_thres = |
2c5a744d S |
1163 | ath_rc_priv->state[rate+1].rssi_thres - |
1164 | rate_table->info[rate].rssi_ack_deltamin; | |
f078f209 LR |
1165 | } |
1166 | ||
256b7759 | 1167 | if (ath_rc_priv->state[rate].rssi_thres < |
2c5a744d | 1168 | rate_table->info[rate].rssi_ack_validmin) { |
256b7759 | 1169 | ath_rc_priv->state[rate].rssi_thres = |
2c5a744d | 1170 | rate_table->info[rate].rssi_ack_validmin; |
f078f209 LR |
1171 | } |
1172 | } | |
1173 | } | |
1174 | } | |
1175 | ||
1176 | /* Make sure the rates below this have lower PER */ | |
1177 | /* Monotonicity is kept only for rates below the current rate. */ | |
256b7759 | 1178 | if (ath_rc_priv->state[tx_rate].per < last_per) { |
f078f209 LR |
1179 | for (rate = tx_rate - 1; rate >= 0; rate--) { |
1180 | if (rate_table->info[rate].phy != | |
dc2222a8 | 1181 | rate_table->info[tx_rate].phy) |
f078f209 LR |
1182 | break; |
1183 | ||
256b7759 S |
1184 | if (ath_rc_priv->state[rate].per > |
1185 | ath_rc_priv->state[rate+1].per) { | |
1186 | ath_rc_priv->state[rate].per = | |
1187 | ath_rc_priv->state[rate+1].per; | |
f078f209 LR |
1188 | } |
1189 | } | |
1190 | } | |
1191 | ||
1192 | /* Maintain monotonicity for rates above the current rate */ | |
2c5a744d S |
1193 | for (rate = tx_rate; rate < size - 1; rate++) { |
1194 | if (ath_rc_priv->state[rate+1].per < | |
1195 | ath_rc_priv->state[rate].per) | |
256b7759 S |
1196 | ath_rc_priv->state[rate+1].per = |
1197 | ath_rc_priv->state[rate].per; | |
f078f209 LR |
1198 | } |
1199 | ||
1200 | /* Every so often, we reduce the thresholds and | |
1201 | * PER (different for CCK and OFDM). */ | |
256b7759 | 1202 | if (now_msec - ath_rc_priv->rssi_down_time >= |
dc2222a8 | 1203 | rate_table->rssi_reduce_interval) { |
f078f209 | 1204 | |
2c5a744d | 1205 | for (rate = 0; rate < size; rate++) { |
256b7759 | 1206 | if (ath_rc_priv->state[rate].rssi_thres > |
dc2222a8 | 1207 | rate_table->info[rate].rssi_ack_validmin) |
256b7759 | 1208 | ath_rc_priv->state[rate].rssi_thres -= 1; |
f078f209 | 1209 | } |
256b7759 | 1210 | ath_rc_priv->rssi_down_time = now_msec; |
f078f209 LR |
1211 | } |
1212 | ||
1213 | /* Every so often, we reduce the thresholds | |
1214 | * and PER (different for CCK and OFDM). */ | |
256b7759 | 1215 | if (now_msec - ath_rc_priv->per_down_time >= |
dc2222a8 | 1216 | rate_table->rssi_reduce_interval) { |
2c5a744d | 1217 | for (rate = 0; rate < size; rate++) { |
256b7759 S |
1218 | ath_rc_priv->state[rate].per = |
1219 | 7 * ath_rc_priv->state[rate].per / 8; | |
f078f209 LR |
1220 | } |
1221 | ||
256b7759 | 1222 | ath_rc_priv->per_down_time = now_msec; |
f078f209 | 1223 | } |
2c5a744d S |
1224 | |
1225 | #undef CHK_RSSI | |
1226 | } | |
1227 | ||
1228 | static int ath_rc_get_rateindex(struct ath_rate_table *rate_table, | |
1229 | struct ieee80211_tx_rate *rate) | |
1230 | { | |
1231 | int rix; | |
1232 | ||
1233 | if ((rate->flags & IEEE80211_TX_RC_40_MHZ_WIDTH) && | |
1234 | (rate->flags & IEEE80211_TX_RC_SHORT_GI)) | |
1235 | rix = rate_table->info[rate->idx].ht_index; | |
1236 | else if (rate->flags & IEEE80211_TX_RC_SHORT_GI) | |
1237 | rix = rate_table->info[rate->idx].sgi_index; | |
1238 | else if (rate->flags & IEEE80211_TX_RC_40_MHZ_WIDTH) | |
1239 | rix = rate_table->info[rate->idx].cw40index; | |
1240 | else | |
1241 | rix = rate_table->info[rate->idx].base_index; | |
1242 | ||
1243 | return rix; | |
f078f209 LR |
1244 | } |
1245 | ||
46d14a58 S |
1246 | static void ath_rc_tx_status(struct ath_softc *sc, |
1247 | struct ath_rate_priv *ath_rc_priv, | |
1248 | struct ieee80211_tx_info *tx_info, | |
1249 | int final_ts_idx, int xretries, int long_retry) | |
f078f209 | 1250 | { |
46d14a58 | 1251 | struct ath_tx_info_priv *tx_info_priv = ATH_TX_INFO_PRIV(tx_info); |
f078f209 | 1252 | struct ath_rate_table *rate_table; |
a8efee4f | 1253 | struct ieee80211_tx_rate *rates = tx_info->status.rates; |
f078f209 | 1254 | u8 flags; |
2c5a744d | 1255 | u32 i = 0, rix; |
f078f209 | 1256 | |
fe7f4a77 | 1257 | rate_table = sc->hw_rate_table[sc->sc_curmode]; |
f078f209 LR |
1258 | |
1259 | /* | |
1260 | * If the first rate is not the final index, there | |
1261 | * are intermediate rate failures to be processed. | |
1262 | */ | |
1263 | if (final_ts_idx != 0) { | |
1264 | /* Process intermediate rates that failed.*/ | |
2c5a744d S |
1265 | for (i = 0; i < final_ts_idx ; i++) { |
1266 | if (rates[i].count != 0 && (rates[i].idx >= 0)) { | |
1267 | flags = rates[i].flags; | |
1268 | ||
f078f209 LR |
1269 | /* If HT40 and we have switched mode from |
1270 | * 40 to 20 => don't update */ | |
2c5a744d | 1271 | |
a8efee4f | 1272 | if ((flags & IEEE80211_TX_RC_40_MHZ_WIDTH) && |
e63835b0 | 1273 | (ath_rc_priv->rc_phy_mode != WLAN_RC_40_FLAG)) |
f078f209 | 1274 | return; |
e63835b0 | 1275 | |
2c5a744d | 1276 | rix = ath_rc_get_rateindex(rate_table, &rates[i]); |
f078f209 | 1277 | ath_rc_update_ht(sc, ath_rc_priv, |
46d14a58 | 1278 | tx_info_priv, rix, |
f078f209 | 1279 | xretries ? 1 : 2, |
2c5a744d | 1280 | rates[i].count); |
f078f209 LR |
1281 | } |
1282 | } | |
1283 | } else { | |
1284 | /* | |
1285 | * Handle the special case of MIMO PS burst, where the second | |
1286 | * aggregate is sent out with only one rate and one try. | |
1287 | * Treating it as an excessive retry penalizes the rate | |
1288 | * inordinately. | |
1289 | */ | |
a8efee4f | 1290 | if (rates[0].count == 1 && xretries == 1) |
f078f209 LR |
1291 | xretries = 2; |
1292 | } | |
1293 | ||
2c5a744d S |
1294 | flags = rates[i].flags; |
1295 | ||
f078f209 | 1296 | /* If HT40 and we have switched mode from 40 to 20 => don't update */ |
a8efee4f | 1297 | if ((flags & IEEE80211_TX_RC_40_MHZ_WIDTH) && |
e63835b0 | 1298 | (ath_rc_priv->rc_phy_mode != WLAN_RC_40_FLAG)) { |
f078f209 | 1299 | return; |
e63835b0 | 1300 | } |
f078f209 | 1301 | |
2c5a744d | 1302 | rix = ath_rc_get_rateindex(rate_table, &rates[i]); |
46d14a58 | 1303 | ath_rc_update_ht(sc, ath_rc_priv, tx_info_priv, rix, |
2c5a744d | 1304 | xretries, long_retry); |
f078f209 LR |
1305 | } |
1306 | ||
5ddfac3b | 1307 | static void ath_rc_init(struct ath_softc *sc, |
46d14a58 | 1308 | struct ath_rate_priv *ath_rc_priv, |
5ddfac3b S |
1309 | struct ieee80211_supported_band *sband, |
1310 | struct ieee80211_sta *sta) | |
f078f209 LR |
1311 | { |
1312 | struct ath_rate_table *rate_table = NULL; | |
5ddfac3b S |
1313 | struct ath_rateset *rateset = &ath_rc_priv->neg_rates; |
1314 | u8 *ht_mcs = (u8 *)&ath_rc_priv->neg_ht_rates; | |
f078f209 LR |
1315 | u8 i, j, k, hi = 0, hthi = 0; |
1316 | ||
fe7f4a77 | 1317 | rate_table = sc->hw_rate_table[sc->sc_curmode]; |
f078f209 | 1318 | |
5ddfac3b S |
1319 | if (sta->ht_cap.ht_supported) { |
1320 | if (sband->band == IEEE80211_BAND_2GHZ) | |
fe7f4a77 | 1321 | rate_table = sc->hw_rate_table[ATH9K_MODE_11NG_HT20]; |
5ddfac3b | 1322 | else |
fe7f4a77 | 1323 | rate_table = sc->hw_rate_table[ATH9K_MODE_11NA_HT20]; |
5ddfac3b S |
1324 | |
1325 | ath_rc_priv->ht_cap = (WLAN_RC_HT_FLAG | WLAN_RC_DS_FLAG); | |
46d14a58 | 1326 | |
5ddfac3b S |
1327 | if (sta->ht_cap.cap & IEEE80211_HT_CAP_SUP_WIDTH_20_40) |
1328 | ath_rc_priv->ht_cap |= WLAN_RC_40_FLAG; | |
1329 | } | |
1330 | ||
f078f209 LR |
1331 | /* Initial rate table size. Will change depending |
1332 | * on the working rate set */ | |
46d14a58 | 1333 | ath_rc_priv->rate_table_size = RATE_TABLE_SIZE; |
f078f209 LR |
1334 | |
1335 | /* Initialize thresholds according to the global rate table */ | |
5ddfac3b | 1336 | for (i = 0 ; i < ath_rc_priv->rate_table_size; i++) { |
256b7759 | 1337 | ath_rc_priv->state[i].rssi_thres = |
f078f209 | 1338 | rate_table->info[i].rssi_ack_validmin; |
256b7759 | 1339 | ath_rc_priv->state[i].per = 0; |
f078f209 LR |
1340 | } |
1341 | ||
1342 | /* Determine the valid rates */ | |
256b7759 | 1343 | ath_rc_init_valid_txmask(ath_rc_priv); |
f078f209 LR |
1344 | |
1345 | for (i = 0; i < WLAN_RC_PHY_MAX; i++) { | |
1346 | for (j = 0; j < MAX_TX_RATE_PHY; j++) | |
256b7759 S |
1347 | ath_rc_priv->valid_phy_rateidx[i][j] = 0; |
1348 | ath_rc_priv->valid_phy_ratecnt[i] = 0; | |
f078f209 | 1349 | } |
5ddfac3b | 1350 | ath_rc_priv->rc_phy_mode = (ath_rc_priv->ht_cap & WLAN_RC_40_FLAG); |
f078f209 LR |
1351 | |
1352 | /* Set stream capability */ | |
5ddfac3b | 1353 | ath_rc_priv->single_stream = (ath_rc_priv->ht_cap & WLAN_RC_DS_FLAG) ? 0 : 1; |
f078f209 LR |
1354 | |
1355 | if (!rateset->rs_nrates) { | |
1356 | /* No working rate, just initialize valid rates */ | |
2c5a744d | 1357 | hi = ath_rc_init_validrates(ath_rc_priv, rate_table, |
5ddfac3b | 1358 | ath_rc_priv->ht_cap); |
f078f209 LR |
1359 | } else { |
1360 | /* Use intersection of working rates and valid rates */ | |
2c5a744d | 1361 | hi = ath_rc_setvalid_rates(ath_rc_priv, rate_table, |
5ddfac3b S |
1362 | rateset, ath_rc_priv->ht_cap); |
1363 | if (ath_rc_priv->ht_cap & WLAN_RC_HT_FLAG) { | |
2c5a744d | 1364 | hthi = ath_rc_setvalid_htrates(ath_rc_priv, |
f078f209 LR |
1365 | rate_table, |
1366 | ht_mcs, | |
5ddfac3b | 1367 | ath_rc_priv->ht_cap); |
f078f209 LR |
1368 | } |
1369 | hi = A_MAX(hi, hthi); | |
1370 | } | |
1371 | ||
256b7759 S |
1372 | ath_rc_priv->rate_table_size = hi + 1; |
1373 | ath_rc_priv->rate_max_phy = 0; | |
46d14a58 | 1374 | ASSERT(ath_rc_priv->rate_table_size <= RATE_TABLE_SIZE); |
f078f209 LR |
1375 | |
1376 | for (i = 0, k = 0; i < WLAN_RC_PHY_MAX; i++) { | |
256b7759 S |
1377 | for (j = 0; j < ath_rc_priv->valid_phy_ratecnt[i]; j++) { |
1378 | ath_rc_priv->valid_rate_index[k++] = | |
1379 | ath_rc_priv->valid_phy_rateidx[i][j]; | |
f078f209 LR |
1380 | } |
1381 | ||
46d14a58 | 1382 | if (!ath_rc_valid_phyrate(i, rate_table->initial_ratemax, 1) |
256b7759 | 1383 | || !ath_rc_priv->valid_phy_ratecnt[i]) |
f078f209 LR |
1384 | continue; |
1385 | ||
256b7759 | 1386 | ath_rc_priv->rate_max_phy = ath_rc_priv->valid_phy_rateidx[i][j-1]; |
f078f209 | 1387 | } |
46d14a58 S |
1388 | ASSERT(ath_rc_priv->rate_table_size <= RATE_TABLE_SIZE); |
1389 | ASSERT(k <= RATE_TABLE_SIZE); | |
f078f209 | 1390 | |
256b7759 | 1391 | ath_rc_priv->max_valid_rate = k; |
256b7759 S |
1392 | ath_rc_sort_validrates(rate_table, ath_rc_priv); |
1393 | ath_rc_priv->rate_max_phy = ath_rc_priv->valid_rate_index[k-4]; | |
f078f209 LR |
1394 | } |
1395 | ||
f078f209 | 1396 | /* Rate Control callbacks */ |
4b7679a5 JB |
1397 | static void ath_tx_status(void *priv, struct ieee80211_supported_band *sband, |
1398 | struct ieee80211_sta *sta, void *priv_sta, | |
f078f209 LR |
1399 | struct sk_buff *skb) |
1400 | { | |
1401 | struct ath_softc *sc = priv; | |
46d14a58 S |
1402 | struct ath_rate_priv *ath_rc_priv = priv_sta; |
1403 | struct ath_tx_info_priv *tx_info_priv = NULL; | |
f078f209 | 1404 | struct ath_node *an; |
f078f209 LR |
1405 | struct ieee80211_tx_info *tx_info = IEEE80211_SKB_CB(skb); |
1406 | struct ieee80211_hdr *hdr; | |
46d14a58 | 1407 | int final_ts_idx, tx_status = 0, is_underrun = 0; |
f078f209 LR |
1408 | __le16 fc; |
1409 | ||
f078f209 LR |
1410 | hdr = (struct ieee80211_hdr *)skb->data; |
1411 | fc = hdr->frame_control; | |
46d14a58 | 1412 | tx_info_priv = ATH_TX_INFO_PRIV(tx_info); |
b5aa9bf9 | 1413 | an = (struct ath_node *)sta->drv_priv; |
46d14a58 | 1414 | final_ts_idx = tx_info_priv->tx.ts_rateindex; |
f078f209 | 1415 | |
7ac47010 VT |
1416 | if (!an || !priv_sta || !ieee80211_is_data(fc) || |
1417 | !tx_info_priv->update_rc) | |
46d14a58 | 1418 | goto exit; |
e6a9854b | 1419 | |
46d14a58 S |
1420 | if (tx_info_priv->tx.ts_status & ATH9K_TXERR_FILT) |
1421 | goto exit; | |
e6a9854b | 1422 | |
46d14a58 S |
1423 | if (tx_info_priv->tx.ts_rssi > 0) { |
1424 | ATH_RSSI_LPF(an->an_chainmask_sel.tx_avgrssi, | |
1425 | tx_info_priv->tx.ts_rssi); | |
1426 | } | |
1427 | ||
1428 | /* | |
1429 | * If underrun error is seen assume it as an excessive retry only | |
1430 | * if prefetch trigger level have reached the max (0x3f for 5416) | |
1431 | * Adjust the long retry as if the frame was tried ATH_11N_TXMAXTRY | |
1432 | * times. This affects how ratectrl updates PER for the failed rate. | |
1433 | */ | |
1434 | if (tx_info_priv->tx.ts_flags & | |
1435 | (ATH9K_TX_DATA_UNDERRUN | ATH9K_TX_DELIM_UNDERRUN) && | |
1436 | ((sc->sc_ah->ah_txTrigLevel) >= ath_rc_priv->tx_triglevel_max)) { | |
1437 | tx_status = 1; | |
1438 | is_underrun = 1; | |
1439 | } | |
1440 | ||
1441 | if ((tx_info_priv->tx.ts_status & ATH9K_TXERR_XRETRY) || | |
1442 | (tx_info_priv->tx.ts_status & ATH9K_TXERR_FIFO)) | |
1443 | tx_status = 1; | |
1444 | ||
1445 | ath_rc_tx_status(sc, ath_rc_priv, tx_info, final_ts_idx, tx_status, | |
1446 | (is_underrun) ? ATH_11N_TXMAXTRY : | |
1447 | tx_info_priv->tx.ts_longretry); | |
1448 | ||
1449 | exit: | |
e6a9854b | 1450 | kfree(tx_info_priv); |
f078f209 LR |
1451 | } |
1452 | ||
e6a9854b JB |
1453 | static void ath_get_rate(void *priv, struct ieee80211_sta *sta, void *priv_sta, |
1454 | struct ieee80211_tx_rate_control *txrc) | |
f078f209 | 1455 | { |
e6a9854b JB |
1456 | struct ieee80211_supported_band *sband = txrc->sband; |
1457 | struct sk_buff *skb = txrc->skb; | |
f078f209 | 1458 | struct ieee80211_hdr *hdr = (struct ieee80211_hdr *)skb->data; |
4b7679a5 | 1459 | struct ath_softc *sc = priv; |
f078f209 | 1460 | struct ieee80211_hw *hw = sc->hw; |
46d14a58 | 1461 | struct ath_rate_priv *ath_rc_priv = priv_sta; |
f078f209 | 1462 | struct ieee80211_tx_info *tx_info = IEEE80211_SKB_CB(skb); |
46d14a58 | 1463 | int is_probe = 0; |
f078f209 | 1464 | __le16 fc = hdr->frame_control; |
f078f209 | 1465 | |
f078f209 | 1466 | /* lowest rate for management and multicast/broadcast frames */ |
a8efee4f S |
1467 | if (!ieee80211_is_data(fc) || is_multicast_ether_addr(hdr->addr1)) { |
1468 | tx_info->control.rates[0].idx = rate_lowest_index(sband, sta); | |
1469 | tx_info->control.rates[0].count = | |
1470 | is_multicast_ether_addr(hdr->addr1) ? 1 : ATH_MGT_TXMAXTRY; | |
f078f209 LR |
1471 | return; |
1472 | } | |
1473 | ||
f078f209 | 1474 | /* Find tx rate for unicast frames */ |
46d14a58 S |
1475 | ath_rc_ratefind(sc, ath_rc_priv, ATH_11N_TXMAXTRY, 4, |
1476 | tx_info, &is_probe, false); | |
f078f209 LR |
1477 | |
1478 | /* Check if aggregation has to be enabled for this tid */ | |
ae5eb026 | 1479 | if (hw->conf.ht.enabled) { |
f078f209 | 1480 | if (ieee80211_is_data_qos(fc)) { |
46d14a58 S |
1481 | u8 *qc, tid; |
1482 | struct ath_node *an; | |
1483 | ||
f078f209 LR |
1484 | qc = ieee80211_get_qos_ctl(hdr); |
1485 | tid = qc[0] & 0xf; | |
b5aa9bf9 | 1486 | an = (struct ath_node *)sta->drv_priv; |
f078f209 | 1487 | |
ccc75c52 S |
1488 | if(ath_tx_aggr_check(sc, an, tid)) |
1489 | ieee80211_start_tx_ba_session(hw, hdr->addr1, tid); | |
f078f209 LR |
1490 | } |
1491 | } | |
1492 | } | |
1493 | ||
4b7679a5 JB |
1494 | static void ath_rate_init(void *priv, struct ieee80211_supported_band *sband, |
1495 | struct ieee80211_sta *sta, void *priv_sta) | |
f078f209 | 1496 | { |
4b7679a5 | 1497 | struct ath_softc *sc = priv; |
46d14a58 | 1498 | struct ath_rate_priv *ath_rc_priv = priv_sta; |
f078f209 LR |
1499 | int i, j = 0; |
1500 | ||
7b4d2735 S |
1501 | for (i = 0; i < sband->n_bitrates; i++) { |
1502 | if (sta->supp_rates[sband->band] & BIT(i)) { | |
1503 | ath_rc_priv->neg_rates.rs_rates[j] | |
1504 | = (sband->bitrates[i].bitrate * 2) / 10; | |
1505 | j++; | |
1506 | } | |
1507 | } | |
1508 | ath_rc_priv->neg_rates.rs_nrates = j; | |
f078f209 | 1509 | |
a4510bf8 | 1510 | if (sta->ht_cap.ht_supported) { |
7b4d2735 | 1511 | for (i = 0, j = 0; i < 77; i++) { |
ae5eb026 | 1512 | if (sta->ht_cap.mcs.rx_mask[i/8] & (1<<(i%8))) |
dc2222a8 | 1513 | ath_rc_priv->neg_ht_rates.rs_rates[j++] = i; |
f078f209 LR |
1514 | if (j == ATH_RATE_MAX) |
1515 | break; | |
1516 | } | |
dc2222a8 | 1517 | ath_rc_priv->neg_ht_rates.rs_nrates = j; |
f078f209 | 1518 | } |
7b4d2735 | 1519 | |
5ddfac3b | 1520 | ath_rc_init(sc, priv_sta, sband, sta); |
f078f209 LR |
1521 | } |
1522 | ||
4b7679a5 | 1523 | static void *ath_rate_alloc(struct ieee80211_hw *hw, struct dentry *debugfsdir) |
f078f209 | 1524 | { |
4b7679a5 | 1525 | return hw->priv; |
f078f209 LR |
1526 | } |
1527 | ||
1528 | static void ath_rate_free(void *priv) | |
1529 | { | |
1530 | return; | |
1531 | } | |
1532 | ||
4b7679a5 | 1533 | static void *ath_rate_alloc_sta(void *priv, struct ieee80211_sta *sta, gfp_t gfp) |
f078f209 LR |
1534 | { |
1535 | struct ath_softc *sc = priv; | |
46d14a58 | 1536 | struct ath_rate_priv *rate_priv; |
f078f209 | 1537 | |
46d14a58 | 1538 | rate_priv = kzalloc(sizeof(struct ath_rate_priv), gfp); |
f078f209 | 1539 | if (!rate_priv) { |
dc2222a8 S |
1540 | DPRINTF(sc, ATH_DBG_FATAL, |
1541 | "%s: Unable to allocate private rc structure\n", | |
1542 | __func__); | |
f078f209 LR |
1543 | return NULL; |
1544 | } | |
fe60594a | 1545 | |
fe60594a | 1546 | rate_priv->rssi_down_time = jiffies_to_msecs(jiffies); |
fe7f4a77 | 1547 | rate_priv->tx_triglevel_max = sc->sc_ah->ah_caps.tx_triglevel_max; |
dc2222a8 | 1548 | |
f078f209 LR |
1549 | return rate_priv; |
1550 | } | |
1551 | ||
4b7679a5 JB |
1552 | static void ath_rate_free_sta(void *priv, struct ieee80211_sta *sta, |
1553 | void *priv_sta) | |
f078f209 | 1554 | { |
46d14a58 | 1555 | struct ath_rate_priv *rate_priv = priv_sta; |
fe60594a | 1556 | kfree(rate_priv); |
f078f209 LR |
1557 | } |
1558 | ||
1559 | static struct rate_control_ops ath_rate_ops = { | |
1560 | .module = NULL, | |
1561 | .name = "ath9k_rate_control", | |
1562 | .tx_status = ath_tx_status, | |
1563 | .get_rate = ath_get_rate, | |
1564 | .rate_init = ath_rate_init, | |
f078f209 LR |
1565 | .alloc = ath_rate_alloc, |
1566 | .free = ath_rate_free, | |
1567 | .alloc_sta = ath_rate_alloc_sta, | |
4b7679a5 | 1568 | .free_sta = ath_rate_free_sta, |
f078f209 LR |
1569 | }; |
1570 | ||
e63835b0 S |
1571 | static void ath_setup_rate_table(struct ath_softc *sc, |
1572 | struct ath_rate_table *rate_table) | |
1573 | { | |
1574 | int i; | |
1575 | ||
1576 | for (i = 0; i < 256; i++) | |
1577 | rate_table->rateCodeToIndex[i] = (u8)-1; | |
1578 | ||
1579 | for (i = 0; i < rate_table->rate_cnt; i++) { | |
1580 | u8 code = rate_table->info[i].ratecode; | |
1581 | u8 cix = rate_table->info[i].ctrl_rate; | |
1582 | u8 sh = rate_table->info[i].short_preamble; | |
1583 | ||
1584 | rate_table->rateCodeToIndex[code] = i; | |
1585 | rate_table->rateCodeToIndex[code | sh] = i; | |
1586 | ||
1587 | rate_table->info[i].lpAckDuration = | |
1588 | ath9k_hw_computetxtime(sc->sc_ah, rate_table, | |
1589 | WLAN_CTRL_FRAME_SIZE, | |
1590 | cix, | |
1591 | false); | |
1592 | rate_table->info[i].spAckDuration = | |
1593 | ath9k_hw_computetxtime(sc->sc_ah, rate_table, | |
1594 | WLAN_CTRL_FRAME_SIZE, | |
1595 | cix, | |
1596 | true); | |
1597 | } | |
1598 | } | |
1599 | ||
fe7f4a77 S |
1600 | void ath_rate_attach(struct ath_softc *sc) |
1601 | { | |
1602 | sc->hw_rate_table[ATH9K_MODE_11B] = | |
1603 | &ar5416_11b_ratetable; | |
1604 | sc->hw_rate_table[ATH9K_MODE_11A] = | |
1605 | &ar5416_11a_ratetable; | |
1606 | sc->hw_rate_table[ATH9K_MODE_11G] = | |
1607 | &ar5416_11g_ratetable; | |
1608 | sc->hw_rate_table[ATH9K_MODE_11NA_HT20] = | |
1609 | &ar5416_11na_ratetable; | |
1610 | sc->hw_rate_table[ATH9K_MODE_11NG_HT20] = | |
1611 | &ar5416_11ng_ratetable; | |
1612 | sc->hw_rate_table[ATH9K_MODE_11NA_HT40PLUS] = | |
1613 | &ar5416_11na_ratetable; | |
1614 | sc->hw_rate_table[ATH9K_MODE_11NA_HT40MINUS] = | |
1615 | &ar5416_11na_ratetable; | |
1616 | sc->hw_rate_table[ATH9K_MODE_11NG_HT40PLUS] = | |
1617 | &ar5416_11ng_ratetable; | |
1618 | sc->hw_rate_table[ATH9K_MODE_11NG_HT40MINUS] = | |
1619 | &ar5416_11ng_ratetable; | |
e63835b0 S |
1620 | |
1621 | ath_setup_rate_table(sc, &ar5416_11b_ratetable); | |
1622 | ath_setup_rate_table(sc, &ar5416_11a_ratetable); | |
1623 | ath_setup_rate_table(sc, &ar5416_11g_ratetable); | |
1624 | ath_setup_rate_table(sc, &ar5416_11na_ratetable); | |
1625 | ath_setup_rate_table(sc, &ar5416_11ng_ratetable); | |
fe7f4a77 S |
1626 | } |
1627 | ||
f078f209 LR |
1628 | int ath_rate_control_register(void) |
1629 | { | |
1630 | return ieee80211_rate_control_register(&ath_rate_ops); | |
1631 | } | |
1632 | ||
1633 | void ath_rate_control_unregister(void) | |
1634 | { | |
1635 | ieee80211_rate_control_unregister(&ath_rate_ops); | |
1636 | } |