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f078f209 LR |
1 | /* |
2 | * Copyright (c) 2004 Video54 Technologies, Inc. | |
cee075a2 | 3 | * Copyright (c) 2004-2009 Atheros Communications, Inc. |
f078f209 LR |
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 | ||
5a0e3ad6 TH |
18 | #include <linux/slab.h> |
19 | ||
394cf0a1 | 20 | #include "ath9k.h" |
f078f209 | 21 | |
4f0fc7c3 | 22 | static const struct ath_rate_table ar5416_11na_ratetable = { |
9e55ba7b | 23 | 43, |
545750d3 | 24 | 8, /* MCS start */ |
f078f209 | 25 | { |
46d14a58 | 26 | { VALID, VALID, WLAN_RC_PHY_OFDM, 6000, /* 6 Mb */ |
1fe8234a | 27 | 5400, 0, 12, 0, 0, 0, 0, 0 }, |
e8324357 | 28 | { VALID, VALID, WLAN_RC_PHY_OFDM, 9000, /* 9 Mb */ |
1fe8234a | 29 | 7800, 1, 18, 0, 1, 1, 1, 1 }, |
46d14a58 | 30 | { VALID, VALID, WLAN_RC_PHY_OFDM, 12000, /* 12 Mb */ |
1fe8234a | 31 | 10000, 2, 24, 2, 2, 2, 2, 2 }, |
46d14a58 | 32 | { VALID, VALID, WLAN_RC_PHY_OFDM, 18000, /* 18 Mb */ |
1fe8234a | 33 | 13900, 3, 36, 2, 3, 3, 3, 3 }, |
46d14a58 | 34 | { VALID, VALID, WLAN_RC_PHY_OFDM, 24000, /* 24 Mb */ |
1fe8234a | 35 | 17300, 4, 48, 4, 4, 4, 4, 4 }, |
46d14a58 | 36 | { VALID, VALID, WLAN_RC_PHY_OFDM, 36000, /* 36 Mb */ |
1fe8234a | 37 | 23000, 5, 72, 4, 5, 5, 5, 5 }, |
46d14a58 | 38 | { VALID, VALID, WLAN_RC_PHY_OFDM, 48000, /* 48 Mb */ |
1fe8234a | 39 | 27400, 6, 96, 4, 6, 6, 6, 6 }, |
46d14a58 | 40 | { VALID, VALID, WLAN_RC_PHY_OFDM, 54000, /* 54 Mb */ |
1fe8234a | 41 | 29300, 7, 108, 4, 7, 7, 7, 7 }, |
42e88560 | 42 | { VALID_2040, VALID_2040, WLAN_RC_PHY_HT_20_SS, 6500, /* 6.5 Mb */ |
6473d24d | 43 | 6400, 0, 0, 0, 8, 25, 8, 25 }, |
46d14a58 | 44 | { VALID_20, VALID_20, WLAN_RC_PHY_HT_20_SS, 13000, /* 13 Mb */ |
6473d24d | 45 | 12700, 1, 1, 2, 9, 26, 9, 26 }, |
46d14a58 | 46 | { VALID_20, VALID_20, WLAN_RC_PHY_HT_20_SS, 19500, /* 19.5 Mb */ |
6473d24d | 47 | 18800, 2, 2, 2, 10, 27, 10, 27 }, |
46d14a58 | 48 | { VALID_20, VALID_20, WLAN_RC_PHY_HT_20_SS, 26000, /* 26 Mb */ |
6473d24d | 49 | 25000, 3, 3, 4, 11, 28, 11, 28 }, |
46d14a58 | 50 | { VALID_20, VALID_20, WLAN_RC_PHY_HT_20_SS, 39000, /* 39 Mb */ |
6473d24d | 51 | 36700, 4, 4, 4, 12, 29, 12, 29 }, |
46d14a58 | 52 | { INVALID, VALID_20, WLAN_RC_PHY_HT_20_SS, 52000, /* 52 Mb */ |
6473d24d | 53 | 48100, 5, 5, 4, 13, 30, 13, 30 }, |
46d14a58 | 54 | { INVALID, VALID_20, WLAN_RC_PHY_HT_20_SS, 58500, /* 58.5 Mb */ |
6473d24d | 55 | 53500, 6, 6, 4, 14, 31, 14, 31 }, |
46d14a58 | 56 | { INVALID, VALID_20, WLAN_RC_PHY_HT_20_SS, 65000, /* 65 Mb */ |
6473d24d | 57 | 59000, 7, 7, 4, 15, 32, 15, 33 }, |
46d14a58 | 58 | { INVALID, INVALID, WLAN_RC_PHY_HT_20_DS, 13000, /* 13 Mb */ |
6473d24d | 59 | 12700, 8, 8, 3, 16, 34, 16, 34 }, |
46d14a58 | 60 | { INVALID, INVALID, WLAN_RC_PHY_HT_20_DS, 26000, /* 26 Mb */ |
6473d24d | 61 | 24800, 9, 9, 2, 17, 35, 17, 35 }, |
46d14a58 | 62 | { INVALID, INVALID, WLAN_RC_PHY_HT_20_DS, 39000, /* 39 Mb */ |
6473d24d | 63 | 36600, 10, 10, 2, 18, 36, 18, 36 }, |
46d14a58 | 64 | { VALID_20, INVALID, WLAN_RC_PHY_HT_20_DS, 52000, /* 52 Mb */ |
6473d24d | 65 | 48100, 11, 11, 4, 19, 37, 19, 37 }, |
46d14a58 | 66 | { VALID_20, INVALID, WLAN_RC_PHY_HT_20_DS, 78000, /* 78 Mb */ |
6473d24d | 67 | 69500, 12, 12, 4, 20, 38, 20, 38 }, |
46d14a58 | 68 | { VALID_20, INVALID, WLAN_RC_PHY_HT_20_DS, 104000, /* 104 Mb */ |
6473d24d | 69 | 89500, 13, 13, 4, 21, 39, 21, 39 }, |
46d14a58 | 70 | { VALID_20, INVALID, WLAN_RC_PHY_HT_20_DS, 117000, /* 117 Mb */ |
6473d24d | 71 | 98900, 14, 14, 4, 22, 40, 22, 40 }, |
46d14a58 | 72 | { VALID_20, INVALID, WLAN_RC_PHY_HT_20_DS, 130000, /* 130 Mb */ |
6473d24d VT |
73 | 108300, 15, 15, 4, 23, 41, 24, 42 }, |
74 | { VALID_20, INVALID, WLAN_RC_PHY_HT_20_DS_HGI, 144400, /* 144.4 Mb */ | |
75 | 12000, 15, 15, 4, 23, 41, 24, 42 }, | |
46d14a58 | 76 | { VALID_40, VALID_40, WLAN_RC_PHY_HT_40_SS, 13500, /* 13.5 Mb */ |
6473d24d | 77 | 13200, 0, 0, 0, 8, 25, 25, 25 }, |
46d14a58 | 78 | { VALID_40, VALID_40, WLAN_RC_PHY_HT_40_SS, 27500, /* 27.0 Mb */ |
6473d24d | 79 | 25900, 1, 1, 2, 9, 26, 26, 26 }, |
46d14a58 | 80 | { VALID_40, VALID_40, WLAN_RC_PHY_HT_40_SS, 40500, /* 40.5 Mb */ |
6473d24d | 81 | 38600, 2, 2, 2, 10, 27, 27, 27 }, |
46d14a58 | 82 | { VALID_40, VALID_40, WLAN_RC_PHY_HT_40_SS, 54000, /* 54 Mb */ |
6473d24d | 83 | 49800, 3, 3, 4, 11, 28, 28, 28 }, |
46d14a58 | 84 | { VALID_40, VALID_40, WLAN_RC_PHY_HT_40_SS, 81500, /* 81 Mb */ |
6473d24d | 85 | 72200, 4, 4, 4, 12, 29, 29, 29 }, |
46d14a58 | 86 | { INVALID, VALID_40, WLAN_RC_PHY_HT_40_SS, 108000, /* 108 Mb */ |
6473d24d | 87 | 92900, 5, 5, 4, 13, 30, 30, 30 }, |
46d14a58 | 88 | { INVALID, VALID_40, WLAN_RC_PHY_HT_40_SS, 121500, /* 121.5 Mb */ |
6473d24d | 89 | 102700, 6, 6, 4, 14, 31, 31, 31 }, |
46d14a58 | 90 | { INVALID, VALID_40, WLAN_RC_PHY_HT_40_SS, 135000, /* 135 Mb */ |
6473d24d | 91 | 112000, 7, 7, 4, 15, 32, 33, 33 }, |
46d14a58 | 92 | { INVALID, VALID_40, WLAN_RC_PHY_HT_40_SS_HGI, 150000, /* 150 Mb */ |
6473d24d | 93 | 122000, 7, 7, 4, 15, 32, 33, 33 }, |
46d14a58 | 94 | { INVALID, INVALID, WLAN_RC_PHY_HT_40_DS, 27000, /* 27 Mb */ |
6473d24d | 95 | 25800, 8, 8, 0, 16, 34, 34, 34 }, |
46d14a58 | 96 | { INVALID, INVALID, WLAN_RC_PHY_HT_40_DS, 54000, /* 54 Mb */ |
6473d24d | 97 | 49800, 9, 9, 2, 17, 35, 35, 35 }, |
46d14a58 | 98 | { INVALID, INVALID, WLAN_RC_PHY_HT_40_DS, 81000, /* 81 Mb */ |
6473d24d | 99 | 71900, 10, 10, 2, 18, 36, 36, 36 }, |
46d14a58 | 100 | { VALID_40, INVALID, WLAN_RC_PHY_HT_40_DS, 108000, /* 108 Mb */ |
6473d24d | 101 | 92500, 11, 11, 4, 19, 37, 37, 37 }, |
46d14a58 | 102 | { VALID_40, INVALID, WLAN_RC_PHY_HT_40_DS, 162000, /* 162 Mb */ |
6473d24d | 103 | 130300, 12, 12, 4, 20, 38, 38, 38 }, |
46d14a58 | 104 | { VALID_40, INVALID, WLAN_RC_PHY_HT_40_DS, 216000, /* 216 Mb */ |
6473d24d | 105 | 162800, 13, 13, 4, 21, 39, 39, 39 }, |
46d14a58 | 106 | { VALID_40, INVALID, WLAN_RC_PHY_HT_40_DS, 243000, /* 243 Mb */ |
6473d24d | 107 | 178200, 14, 14, 4, 22, 40, 40, 40 }, |
46d14a58 | 108 | { VALID_40, INVALID, WLAN_RC_PHY_HT_40_DS, 270000, /* 270 Mb */ |
6473d24d | 109 | 192100, 15, 15, 4, 23, 41, 42, 42 }, |
46d14a58 | 110 | { VALID_40, INVALID, WLAN_RC_PHY_HT_40_DS_HGI, 300000, /* 300 Mb */ |
6473d24d | 111 | 207000, 15, 15, 4, 23, 41, 42, 42 }, |
f078f209 LR |
112 | }, |
113 | 50, /* probe interval */ | |
f078f209 LR |
114 | WLAN_RC_HT_FLAG, /* Phy rates allowed initially */ |
115 | }; | |
116 | ||
f078f209 LR |
117 | /* 4ms frame limit not used for NG mode. The values filled |
118 | * for HT are the 64K max aggregate limit */ | |
119 | ||
4f0fc7c3 | 120 | static const struct ath_rate_table ar5416_11ng_ratetable = { |
9e55ba7b | 121 | 47, |
545750d3 | 122 | 12, /* MCS start */ |
f078f209 | 123 | { |
46d14a58 | 124 | { VALID_ALL, VALID_ALL, WLAN_RC_PHY_CCK, 1000, /* 1 Mb */ |
1fe8234a | 125 | 900, 0, 2, 0, 0, 0, 0, 0 }, |
46d14a58 | 126 | { VALID_ALL, VALID_ALL, WLAN_RC_PHY_CCK, 2000, /* 2 Mb */ |
1fe8234a | 127 | 1900, 1, 4, 1, 1, 1, 1, 1 }, |
46d14a58 | 128 | { VALID_ALL, VALID_ALL, WLAN_RC_PHY_CCK, 5500, /* 5.5 Mb */ |
1fe8234a | 129 | 4900, 2, 11, 2, 2, 2, 2, 2 }, |
46d14a58 | 130 | { VALID_ALL, VALID_ALL, WLAN_RC_PHY_CCK, 11000, /* 11 Mb */ |
1fe8234a | 131 | 8100, 3, 22, 3, 3, 3, 3, 3 }, |
46d14a58 | 132 | { INVALID, INVALID, WLAN_RC_PHY_OFDM, 6000, /* 6 Mb */ |
1fe8234a | 133 | 5400, 4, 12, 4, 4, 4, 4, 4 }, |
46d14a58 | 134 | { INVALID, INVALID, WLAN_RC_PHY_OFDM, 9000, /* 9 Mb */ |
1fe8234a | 135 | 7800, 5, 18, 4, 5, 5, 5, 5 }, |
46d14a58 | 136 | { VALID, VALID, WLAN_RC_PHY_OFDM, 12000, /* 12 Mb */ |
1fe8234a | 137 | 10100, 6, 24, 6, 6, 6, 6, 6 }, |
46d14a58 | 138 | { VALID, VALID, WLAN_RC_PHY_OFDM, 18000, /* 18 Mb */ |
1fe8234a | 139 | 14100, 7, 36, 6, 7, 7, 7, 7 }, |
46d14a58 | 140 | { VALID, VALID, WLAN_RC_PHY_OFDM, 24000, /* 24 Mb */ |
1fe8234a | 141 | 17700, 8, 48, 8, 8, 8, 8, 8 }, |
46d14a58 | 142 | { VALID, VALID, WLAN_RC_PHY_OFDM, 36000, /* 36 Mb */ |
1fe8234a | 143 | 23700, 9, 72, 8, 9, 9, 9, 9 }, |
46d14a58 | 144 | { VALID, VALID, WLAN_RC_PHY_OFDM, 48000, /* 48 Mb */ |
1fe8234a | 145 | 27400, 10, 96, 8, 10, 10, 10, 10 }, |
46d14a58 | 146 | { VALID, VALID, WLAN_RC_PHY_OFDM, 54000, /* 54 Mb */ |
1fe8234a | 147 | 30900, 11, 108, 8, 11, 11, 11, 11 }, |
46d14a58 | 148 | { INVALID, INVALID, WLAN_RC_PHY_HT_20_SS, 6500, /* 6.5 Mb */ |
6473d24d | 149 | 6400, 0, 0, 4, 12, 29, 12, 29 }, |
46d14a58 | 150 | { VALID_20, VALID_20, WLAN_RC_PHY_HT_20_SS, 13000, /* 13 Mb */ |
6473d24d | 151 | 12700, 1, 1, 6, 13, 30, 13, 30 }, |
46d14a58 | 152 | { VALID_20, VALID_20, WLAN_RC_PHY_HT_20_SS, 19500, /* 19.5 Mb */ |
6473d24d | 153 | 18800, 2, 2, 6, 14, 31, 14, 31 }, |
46d14a58 | 154 | { VALID_20, VALID_20, WLAN_RC_PHY_HT_20_SS, 26000, /* 26 Mb */ |
6473d24d | 155 | 25000, 3, 3, 8, 15, 32, 15, 32 }, |
46d14a58 | 156 | { VALID_20, VALID_20, WLAN_RC_PHY_HT_20_SS, 39000, /* 39 Mb */ |
6473d24d | 157 | 36700, 4, 4, 8, 16, 33, 16, 33 }, |
46d14a58 | 158 | { INVALID, VALID_20, WLAN_RC_PHY_HT_20_SS, 52000, /* 52 Mb */ |
6473d24d | 159 | 48100, 5, 5, 8, 17, 34, 17, 34 }, |
46d14a58 | 160 | { INVALID, VALID_20, WLAN_RC_PHY_HT_20_SS, 58500, /* 58.5 Mb */ |
6473d24d | 161 | 53500, 6, 6, 8, 18, 35, 18, 35 }, |
46d14a58 | 162 | { INVALID, VALID_20, WLAN_RC_PHY_HT_20_SS, 65000, /* 65 Mb */ |
6473d24d | 163 | 59000, 7, 7, 8, 19, 36, 19, 37 }, |
46d14a58 | 164 | { INVALID, INVALID, WLAN_RC_PHY_HT_20_DS, 13000, /* 13 Mb */ |
6473d24d | 165 | 12700, 8, 8, 4, 20, 38, 20, 38 }, |
46d14a58 | 166 | { INVALID, INVALID, WLAN_RC_PHY_HT_20_DS, 26000, /* 26 Mb */ |
6473d24d | 167 | 24800, 9, 9, 6, 21, 39, 21, 39 }, |
46d14a58 | 168 | { INVALID, INVALID, WLAN_RC_PHY_HT_20_DS, 39000, /* 39 Mb */ |
6473d24d | 169 | 36600, 10, 10, 6, 22, 40, 22, 40 }, |
46d14a58 | 170 | { VALID_20, INVALID, WLAN_RC_PHY_HT_20_DS, 52000, /* 52 Mb */ |
6473d24d | 171 | 48100, 11, 11, 8, 23, 41, 23, 41 }, |
46d14a58 | 172 | { VALID_20, INVALID, WLAN_RC_PHY_HT_20_DS, 78000, /* 78 Mb */ |
6473d24d | 173 | 69500, 12, 12, 8, 24, 42, 24, 42 }, |
46d14a58 | 174 | { VALID_20, INVALID, WLAN_RC_PHY_HT_20_DS, 104000, /* 104 Mb */ |
6473d24d | 175 | 89500, 13, 13, 8, 25, 43, 25, 43 }, |
46d14a58 | 176 | { VALID_20, INVALID, WLAN_RC_PHY_HT_20_DS, 117000, /* 117 Mb */ |
6473d24d | 177 | 98900, 14, 14, 8, 26, 44, 26, 44 }, |
46d14a58 | 178 | { VALID_20, INVALID, WLAN_RC_PHY_HT_20_DS, 130000, /* 130 Mb */ |
6473d24d VT |
179 | 108300, 15, 15, 8, 27, 45, 28, 46 }, |
180 | { VALID_20, INVALID, WLAN_RC_PHY_HT_20_DS_HGI, 144400, /* 130 Mb */ | |
181 | 120000, 15, 15, 8, 27, 45, 28, 46 }, | |
46d14a58 | 182 | { VALID_40, VALID_40, WLAN_RC_PHY_HT_40_SS, 13500, /* 13.5 Mb */ |
6473d24d | 183 | 13200, 0, 0, 8, 12, 29, 29, 29 }, |
46d14a58 | 184 | { VALID_40, VALID_40, WLAN_RC_PHY_HT_40_SS, 27500, /* 27.0 Mb */ |
6473d24d | 185 | 25900, 1, 1, 8, 13, 30, 30, 30 }, |
46d14a58 | 186 | { VALID_40, VALID_40, WLAN_RC_PHY_HT_40_SS, 40500, /* 40.5 Mb */ |
6473d24d | 187 | 38600, 2, 2, 8, 14, 31, 31, 31 }, |
46d14a58 | 188 | { VALID_40, VALID_40, WLAN_RC_PHY_HT_40_SS, 54000, /* 54 Mb */ |
6473d24d | 189 | 49800, 3, 3, 8, 15, 32, 32, 32 }, |
46d14a58 | 190 | { VALID_40, VALID_40, WLAN_RC_PHY_HT_40_SS, 81500, /* 81 Mb */ |
6473d24d | 191 | 72200, 4, 4, 8, 16, 33, 33, 33 }, |
46d14a58 | 192 | { INVALID, VALID_40, WLAN_RC_PHY_HT_40_SS, 108000, /* 108 Mb */ |
6473d24d | 193 | 92900, 5, 5, 8, 17, 34, 34, 34 }, |
46d14a58 | 194 | { INVALID, VALID_40, WLAN_RC_PHY_HT_40_SS, 121500, /* 121.5 Mb */ |
6473d24d | 195 | 102700, 6, 6, 8, 18, 35, 35, 35 }, |
46d14a58 | 196 | { INVALID, VALID_40, WLAN_RC_PHY_HT_40_SS, 135000, /* 135 Mb */ |
6473d24d | 197 | 112000, 7, 7, 8, 19, 36, 37, 37 }, |
46d14a58 | 198 | { INVALID, VALID_40, WLAN_RC_PHY_HT_40_SS_HGI, 150000, /* 150 Mb */ |
6473d24d | 199 | 122000, 7, 7, 8, 19, 36, 37, 37 }, |
46d14a58 | 200 | { INVALID, INVALID, WLAN_RC_PHY_HT_40_DS, 27000, /* 27 Mb */ |
6473d24d | 201 | 25800, 8, 8, 8, 20, 38, 38, 38 }, |
46d14a58 | 202 | { INVALID, INVALID, WLAN_RC_PHY_HT_40_DS, 54000, /* 54 Mb */ |
6473d24d | 203 | 49800, 9, 9, 8, 21, 39, 39, 39 }, |
46d14a58 | 204 | { INVALID, INVALID, WLAN_RC_PHY_HT_40_DS, 81000, /* 81 Mb */ |
6473d24d | 205 | 71900, 10, 10, 8, 22, 40, 40, 40 }, |
46d14a58 | 206 | { VALID_40, INVALID, WLAN_RC_PHY_HT_40_DS, 108000, /* 108 Mb */ |
6473d24d | 207 | 92500, 11, 11, 8, 23, 41, 41, 41 }, |
46d14a58 | 208 | { VALID_40, INVALID, WLAN_RC_PHY_HT_40_DS, 162000, /* 162 Mb */ |
6473d24d | 209 | 130300, 12, 12, 8, 24, 42, 42, 42 }, |
46d14a58 | 210 | { VALID_40, INVALID, WLAN_RC_PHY_HT_40_DS, 216000, /* 216 Mb */ |
6473d24d | 211 | 162800, 13, 13, 8, 25, 43, 43, 43 }, |
46d14a58 | 212 | { VALID_40, INVALID, WLAN_RC_PHY_HT_40_DS, 243000, /* 243 Mb */ |
6473d24d | 213 | 178200, 14, 14, 8, 26, 44, 44, 44 }, |
46d14a58 | 214 | { VALID_40, INVALID, WLAN_RC_PHY_HT_40_DS, 270000, /* 270 Mb */ |
6473d24d | 215 | 192100, 15, 15, 8, 27, 45, 46, 46 }, |
46d14a58 | 216 | { VALID_40, INVALID, WLAN_RC_PHY_HT_40_DS_HGI, 300000, /* 300 Mb */ |
6473d24d | 217 | 207000, 15, 15, 8, 27, 45, 46, 46 }, |
1fe8234a | 218 | }, |
f078f209 | 219 | 50, /* probe interval */ |
f078f209 LR |
220 | WLAN_RC_HT_FLAG, /* Phy rates allowed initially */ |
221 | }; | |
222 | ||
4f0fc7c3 | 223 | static const struct ath_rate_table ar5416_11a_ratetable = { |
f078f209 | 224 | 8, |
545750d3 | 225 | 0, |
f078f209 | 226 | { |
46d14a58 | 227 | { VALID, VALID, WLAN_RC_PHY_OFDM, 6000, /* 6 Mb */ |
1fe8234a | 228 | 5400, 0, 12, 0, 0, 0 }, |
46d14a58 | 229 | { VALID, VALID, WLAN_RC_PHY_OFDM, 9000, /* 9 Mb */ |
1fe8234a | 230 | 7800, 1, 18, 0, 1, 0 }, |
46d14a58 | 231 | { VALID, VALID, WLAN_RC_PHY_OFDM, 12000, /* 12 Mb */ |
1fe8234a | 232 | 10000, 2, 24, 2, 2, 0 }, |
46d14a58 | 233 | { VALID, VALID, WLAN_RC_PHY_OFDM, 18000, /* 18 Mb */ |
1fe8234a | 234 | 13900, 3, 36, 2, 3, 0 }, |
46d14a58 | 235 | { VALID, VALID, WLAN_RC_PHY_OFDM, 24000, /* 24 Mb */ |
1fe8234a | 236 | 17300, 4, 48, 4, 4, 0 }, |
46d14a58 | 237 | { VALID, VALID, WLAN_RC_PHY_OFDM, 36000, /* 36 Mb */ |
1fe8234a | 238 | 23000, 5, 72, 4, 5, 0 }, |
46d14a58 | 239 | { VALID, VALID, WLAN_RC_PHY_OFDM, 48000, /* 48 Mb */ |
1fe8234a | 240 | 27400, 6, 96, 4, 6, 0 }, |
46d14a58 | 241 | { VALID, VALID, WLAN_RC_PHY_OFDM, 54000, /* 54 Mb */ |
1fe8234a | 242 | 29300, 7, 108, 4, 7, 0 }, |
f078f209 LR |
243 | }, |
244 | 50, /* probe interval */ | |
f078f209 LR |
245 | 0, /* Phy rates allowed initially */ |
246 | }; | |
247 | ||
4f0fc7c3 | 248 | static const struct ath_rate_table ar5416_11g_ratetable = { |
f078f209 | 249 | 12, |
545750d3 | 250 | 0, |
f078f209 | 251 | { |
46d14a58 | 252 | { VALID, VALID, WLAN_RC_PHY_CCK, 1000, /* 1 Mb */ |
1fe8234a | 253 | 900, 0, 2, 0, 0, 0 }, |
46d14a58 | 254 | { VALID, VALID, WLAN_RC_PHY_CCK, 2000, /* 2 Mb */ |
1fe8234a | 255 | 1900, 1, 4, 1, 1, 0 }, |
46d14a58 | 256 | { VALID, VALID, WLAN_RC_PHY_CCK, 5500, /* 5.5 Mb */ |
1fe8234a | 257 | 4900, 2, 11, 2, 2, 0 }, |
46d14a58 | 258 | { VALID, VALID, WLAN_RC_PHY_CCK, 11000, /* 11 Mb */ |
1fe8234a | 259 | 8100, 3, 22, 3, 3, 0 }, |
46d14a58 | 260 | { INVALID, INVALID, WLAN_RC_PHY_OFDM, 6000, /* 6 Mb */ |
1fe8234a | 261 | 5400, 4, 12, 4, 4, 0 }, |
46d14a58 | 262 | { INVALID, INVALID, WLAN_RC_PHY_OFDM, 9000, /* 9 Mb */ |
1fe8234a | 263 | 7800, 5, 18, 4, 5, 0 }, |
46d14a58 | 264 | { VALID, VALID, WLAN_RC_PHY_OFDM, 12000, /* 12 Mb */ |
1fe8234a | 265 | 10000, 6, 24, 6, 6, 0 }, |
46d14a58 | 266 | { VALID, VALID, WLAN_RC_PHY_OFDM, 18000, /* 18 Mb */ |
1fe8234a | 267 | 13900, 7, 36, 6, 7, 0 }, |
46d14a58 | 268 | { VALID, VALID, WLAN_RC_PHY_OFDM, 24000, /* 24 Mb */ |
1fe8234a | 269 | 17300, 8, 48, 8, 8, 0 }, |
46d14a58 | 270 | { VALID, VALID, WLAN_RC_PHY_OFDM, 36000, /* 36 Mb */ |
1fe8234a | 271 | 23000, 9, 72, 8, 9, 0 }, |
46d14a58 | 272 | { VALID, VALID, WLAN_RC_PHY_OFDM, 48000, /* 48 Mb */ |
1fe8234a | 273 | 27400, 10, 96, 8, 10, 0 }, |
46d14a58 | 274 | { VALID, VALID, WLAN_RC_PHY_OFDM, 54000, /* 54 Mb */ |
1fe8234a | 275 | 29300, 11, 108, 8, 11, 0 }, |
f078f209 LR |
276 | }, |
277 | 50, /* probe interval */ | |
f078f209 LR |
278 | 0, /* Phy rates allowed initially */ |
279 | }; | |
280 | ||
545750d3 FF |
281 | static const struct ath_rate_table *hw_rate_table[ATH9K_MODE_MAX] = { |
282 | [ATH9K_MODE_11A] = &ar5416_11a_ratetable, | |
283 | [ATH9K_MODE_11G] = &ar5416_11g_ratetable, | |
284 | [ATH9K_MODE_11NA_HT20] = &ar5416_11na_ratetable, | |
285 | [ATH9K_MODE_11NG_HT20] = &ar5416_11ng_ratetable, | |
286 | [ATH9K_MODE_11NA_HT40PLUS] = &ar5416_11na_ratetable, | |
287 | [ATH9K_MODE_11NA_HT40MINUS] = &ar5416_11na_ratetable, | |
288 | [ATH9K_MODE_11NG_HT40PLUS] = &ar5416_11ng_ratetable, | |
289 | [ATH9K_MODE_11NG_HT40MINUS] = &ar5416_11ng_ratetable, | |
290 | }; | |
291 | ||
292 | static int ath_rc_get_rateindex(const struct ath_rate_table *rate_table, | |
293 | struct ieee80211_tx_rate *rate); | |
294 | ||
f078f209 LR |
295 | static inline int8_t median(int8_t a, int8_t b, int8_t c) |
296 | { | |
297 | if (a >= b) { | |
298 | if (b >= c) | |
299 | return b; | |
300 | else if (a > c) | |
301 | return c; | |
302 | else | |
303 | return a; | |
304 | } else { | |
305 | if (a >= c) | |
306 | return a; | |
307 | else if (b >= c) | |
308 | return c; | |
309 | else | |
310 | return b; | |
311 | } | |
312 | } | |
313 | ||
4f0fc7c3 | 314 | static void ath_rc_sort_validrates(const struct ath_rate_table *rate_table, |
46d14a58 | 315 | struct ath_rate_priv *ath_rc_priv) |
f078f209 LR |
316 | { |
317 | u8 i, j, idx, idx_next; | |
318 | ||
256b7759 | 319 | for (i = ath_rc_priv->max_valid_rate - 1; i > 0; i--) { |
f078f209 | 320 | for (j = 0; j <= i-1; j++) { |
256b7759 S |
321 | idx = ath_rc_priv->valid_rate_index[j]; |
322 | idx_next = ath_rc_priv->valid_rate_index[j+1]; | |
f078f209 LR |
323 | |
324 | if (rate_table->info[idx].ratekbps > | |
325 | rate_table->info[idx_next].ratekbps) { | |
256b7759 S |
326 | ath_rc_priv->valid_rate_index[j] = idx_next; |
327 | ath_rc_priv->valid_rate_index[j+1] = idx; | |
f078f209 LR |
328 | } |
329 | } | |
330 | } | |
331 | } | |
332 | ||
46d14a58 | 333 | static void ath_rc_init_valid_txmask(struct ath_rate_priv *ath_rc_priv) |
f078f209 LR |
334 | { |
335 | u8 i; | |
336 | ||
256b7759 | 337 | for (i = 0; i < ath_rc_priv->rate_table_size; i++) |
46d14a58 | 338 | ath_rc_priv->valid_rate_index[i] = 0; |
f078f209 LR |
339 | } |
340 | ||
46d14a58 | 341 | static inline void ath_rc_set_valid_txmask(struct ath_rate_priv *ath_rc_priv, |
f078f209 LR |
342 | u8 index, int valid_tx_rate) |
343 | { | |
9680e8a3 | 344 | BUG_ON(index > ath_rc_priv->rate_table_size); |
46d14a58 | 345 | ath_rc_priv->valid_rate_index[index] = valid_tx_rate ? 1 : 0; |
f078f209 LR |
346 | } |
347 | ||
4f0fc7c3 LR |
348 | static inline |
349 | int ath_rc_get_nextvalid_txrate(const struct ath_rate_table *rate_table, | |
350 | struct ath_rate_priv *ath_rc_priv, | |
351 | u8 cur_valid_txrate, | |
352 | u8 *next_idx) | |
f078f209 LR |
353 | { |
354 | u8 i; | |
355 | ||
256b7759 S |
356 | for (i = 0; i < ath_rc_priv->max_valid_rate - 1; i++) { |
357 | if (ath_rc_priv->valid_rate_index[i] == cur_valid_txrate) { | |
358 | *next_idx = ath_rc_priv->valid_rate_index[i+1]; | |
46d14a58 | 359 | return 1; |
f078f209 LR |
360 | } |
361 | } | |
362 | ||
363 | /* No more valid rates */ | |
364 | *next_idx = 0; | |
2c5a744d | 365 | |
46d14a58 | 366 | return 0; |
f078f209 LR |
367 | } |
368 | ||
369 | /* Return true only for single stream */ | |
370 | ||
371 | static int ath_rc_valid_phyrate(u32 phy, u32 capflag, int ignore_cw) | |
372 | { | |
b657eade | 373 | if (WLAN_RC_PHY_HT(phy) && !(capflag & WLAN_RC_HT_FLAG)) |
46d14a58 | 374 | return 0; |
f078f209 | 375 | if (WLAN_RC_PHY_DS(phy) && !(capflag & WLAN_RC_DS_FLAG)) |
46d14a58 | 376 | return 0; |
f078f209 | 377 | if (WLAN_RC_PHY_SGI(phy) && !(capflag & WLAN_RC_SGI_FLAG)) |
46d14a58 | 378 | return 0; |
f078f209 LR |
379 | if (!ignore_cw && WLAN_RC_PHY_HT(phy)) |
380 | if (WLAN_RC_PHY_40(phy) && !(capflag & WLAN_RC_40_FLAG)) | |
46d14a58 | 381 | return 0; |
46d14a58 | 382 | return 1; |
f078f209 LR |
383 | } |
384 | ||
385 | static inline int | |
39448b0a LR |
386 | ath_rc_get_lower_rix(const struct ath_rate_table *rate_table, |
387 | struct ath_rate_priv *ath_rc_priv, | |
388 | u8 cur_valid_txrate, u8 *next_idx) | |
f078f209 LR |
389 | { |
390 | int8_t i; | |
391 | ||
256b7759 S |
392 | for (i = 1; i < ath_rc_priv->max_valid_rate ; i++) { |
393 | if (ath_rc_priv->valid_rate_index[i] == cur_valid_txrate) { | |
394 | *next_idx = ath_rc_priv->valid_rate_index[i-1]; | |
46d14a58 | 395 | return 1; |
f078f209 LR |
396 | } |
397 | } | |
2c5a744d | 398 | |
46d14a58 | 399 | return 0; |
f078f209 LR |
400 | } |
401 | ||
2c5a744d | 402 | static u8 ath_rc_init_validrates(struct ath_rate_priv *ath_rc_priv, |
4f0fc7c3 | 403 | const struct ath_rate_table *rate_table, |
2c5a744d | 404 | u32 capflag) |
f078f209 | 405 | { |
f078f209 LR |
406 | u8 i, hi = 0; |
407 | u32 valid; | |
408 | ||
f078f209 | 409 | for (i = 0; i < rate_table->rate_cnt; i++) { |
c6483cfe | 410 | valid = (!(ath_rc_priv->ht_cap & WLAN_RC_DS_FLAG) ? |
dc2222a8 S |
411 | rate_table->info[i].valid_single_stream : |
412 | rate_table->info[i].valid); | |
46d14a58 | 413 | if (valid == 1) { |
f078f209 LR |
414 | u32 phy = rate_table->info[i].phy; |
415 | u8 valid_rate_count = 0; | |
416 | ||
46d14a58 | 417 | if (!ath_rc_valid_phyrate(phy, capflag, 0)) |
f078f209 LR |
418 | continue; |
419 | ||
256b7759 | 420 | valid_rate_count = ath_rc_priv->valid_phy_ratecnt[phy]; |
f078f209 | 421 | |
256b7759 S |
422 | ath_rc_priv->valid_phy_rateidx[phy][valid_rate_count] = i; |
423 | ath_rc_priv->valid_phy_ratecnt[phy] += 1; | |
46d14a58 | 424 | ath_rc_set_valid_txmask(ath_rc_priv, i, 1); |
f078f209 LR |
425 | hi = A_MAX(hi, i); |
426 | } | |
427 | } | |
2c5a744d | 428 | |
f078f209 LR |
429 | return hi; |
430 | } | |
431 | ||
2c5a744d | 432 | static u8 ath_rc_setvalid_rates(struct ath_rate_priv *ath_rc_priv, |
4f0fc7c3 | 433 | const struct ath_rate_table *rate_table, |
2c5a744d S |
434 | struct ath_rateset *rateset, |
435 | u32 capflag) | |
f078f209 | 436 | { |
f078f209 | 437 | u8 i, j, hi = 0; |
f078f209 LR |
438 | |
439 | /* Use intersection of working rates and valid rates */ | |
440 | for (i = 0; i < rateset->rs_nrates; i++) { | |
441 | for (j = 0; j < rate_table->rate_cnt; j++) { | |
442 | u32 phy = rate_table->info[j].phy; | |
c6483cfe S |
443 | u32 valid = (!(ath_rc_priv->ht_cap & WLAN_RC_DS_FLAG) ? |
444 | rate_table->info[j].valid_single_stream : | |
445 | rate_table->info[j].valid); | |
2c5a744d S |
446 | u8 rate = rateset->rs_rates[i]; |
447 | u8 dot11rate = rate_table->info[j].dot11rate; | |
f078f209 LR |
448 | |
449 | /* We allow a rate only if its valid and the | |
450 | * capflag matches one of the validity | |
46d14a58 | 451 | * (VALID/VALID_20/VALID_40) flags */ |
f078f209 | 452 | |
545750d3 | 453 | if ((rate == dot11rate) && |
2c5a744d S |
454 | ((valid & WLAN_RC_CAP_MODE(capflag)) == |
455 | WLAN_RC_CAP_MODE(capflag)) && | |
456 | !WLAN_RC_PHY_HT(phy)) { | |
f078f209 LR |
457 | u8 valid_rate_count = 0; |
458 | ||
46d14a58 | 459 | if (!ath_rc_valid_phyrate(phy, capflag, 0)) |
f078f209 LR |
460 | continue; |
461 | ||
462 | valid_rate_count = | |
256b7759 | 463 | ath_rc_priv->valid_phy_ratecnt[phy]; |
f078f209 | 464 | |
256b7759 | 465 | ath_rc_priv->valid_phy_rateidx[phy] |
f078f209 | 466 | [valid_rate_count] = j; |
256b7759 | 467 | ath_rc_priv->valid_phy_ratecnt[phy] += 1; |
46d14a58 | 468 | ath_rc_set_valid_txmask(ath_rc_priv, j, 1); |
f078f209 LR |
469 | hi = A_MAX(hi, j); |
470 | } | |
471 | } | |
472 | } | |
2c5a744d | 473 | |
f078f209 LR |
474 | return hi; |
475 | } | |
476 | ||
2c5a744d | 477 | static u8 ath_rc_setvalid_htrates(struct ath_rate_priv *ath_rc_priv, |
4f0fc7c3 | 478 | const struct ath_rate_table *rate_table, |
2c5a744d | 479 | u8 *mcs_set, u32 capflag) |
f078f209 | 480 | { |
2c5a744d S |
481 | struct ath_rateset *rateset = (struct ath_rateset *)mcs_set; |
482 | ||
f078f209 | 483 | u8 i, j, hi = 0; |
f078f209 LR |
484 | |
485 | /* Use intersection of working rates and valid rates */ | |
2c5a744d | 486 | for (i = 0; i < rateset->rs_nrates; i++) { |
f078f209 LR |
487 | for (j = 0; j < rate_table->rate_cnt; j++) { |
488 | u32 phy = rate_table->info[j].phy; | |
c6483cfe | 489 | u32 valid = (!(ath_rc_priv->ht_cap & WLAN_RC_DS_FLAG) ? |
dc2222a8 S |
490 | rate_table->info[j].valid_single_stream : |
491 | rate_table->info[j].valid); | |
2c5a744d S |
492 | u8 rate = rateset->rs_rates[i]; |
493 | u8 dot11rate = rate_table->info[j].dot11rate; | |
f078f209 | 494 | |
545750d3 | 495 | if ((rate != dot11rate) || !WLAN_RC_PHY_HT(phy) || |
dc2222a8 | 496 | !WLAN_RC_PHY_HT_VALID(valid, capflag)) |
f078f209 LR |
497 | continue; |
498 | ||
46d14a58 | 499 | if (!ath_rc_valid_phyrate(phy, capflag, 0)) |
f078f209 LR |
500 | continue; |
501 | ||
256b7759 S |
502 | ath_rc_priv->valid_phy_rateidx[phy] |
503 | [ath_rc_priv->valid_phy_ratecnt[phy]] = j; | |
504 | ath_rc_priv->valid_phy_ratecnt[phy] += 1; | |
46d14a58 | 505 | ath_rc_set_valid_txmask(ath_rc_priv, j, 1); |
f078f209 LR |
506 | hi = A_MAX(hi, j); |
507 | } | |
508 | } | |
f078f209 | 509 | |
2c5a744d | 510 | return hi; |
f078f209 LR |
511 | } |
512 | ||
201c3b41 LR |
513 | /* Finds the highest rate index we can use */ |
514 | static u8 ath_rc_get_highest_rix(struct ath_softc *sc, | |
515 | struct ath_rate_priv *ath_rc_priv, | |
516 | const struct ath_rate_table *rate_table, | |
517 | int *is_probing) | |
f078f209 | 518 | { |
39a4cafe | 519 | u32 best_thruput, this_thruput, now_msec; |
f078f209 | 520 | u8 rate, next_rate, best_rate, maxindex, minindex; |
39a4cafe | 521 | int8_t index = 0; |
f078f209 LR |
522 | |
523 | now_msec = jiffies_to_msecs(jiffies); | |
39a4cafe | 524 | *is_probing = 0; |
f078f209 | 525 | best_thruput = 0; |
256b7759 | 526 | maxindex = ath_rc_priv->max_valid_rate-1; |
f078f209 LR |
527 | minindex = 0; |
528 | best_rate = minindex; | |
529 | ||
530 | /* | |
531 | * Try the higher rate first. It will reduce memory moving time | |
532 | * if we have very good channel characteristics. | |
533 | */ | |
534 | for (index = maxindex; index >= minindex ; index--) { | |
535 | u8 per_thres; | |
536 | ||
256b7759 S |
537 | rate = ath_rc_priv->valid_rate_index[index]; |
538 | if (rate > ath_rc_priv->rate_max_phy) | |
f078f209 LR |
539 | continue; |
540 | ||
541 | /* | |
542 | * For TCP the average collision rate is around 11%, | |
543 | * so we ignore PERs less than this. This is to | |
544 | * prevent the rate we are currently using (whose | |
545 | * PER might be in the 10-15 range because of TCP | |
546 | * collisions) looking worse than the next lower | |
547 | * rate whose PER has decayed close to 0. If we | |
548 | * used to next lower rate, its PER would grow to | |
549 | * 10-15 and we would be worse off then staying | |
550 | * at the current rate. | |
551 | */ | |
922bac60 | 552 | per_thres = ath_rc_priv->per[rate]; |
f078f209 LR |
553 | if (per_thres < 12) |
554 | per_thres = 12; | |
555 | ||
556 | this_thruput = rate_table->info[rate].user_ratekbps * | |
557 | (100 - per_thres); | |
558 | ||
559 | if (best_thruput <= this_thruput) { | |
560 | best_thruput = this_thruput; | |
561 | best_rate = rate; | |
562 | } | |
563 | } | |
564 | ||
565 | rate = best_rate; | |
f078f209 LR |
566 | |
567 | /* | |
568 | * Must check the actual rate (ratekbps) to account for | |
569 | * non-monoticity of 11g's rate table | |
570 | */ | |
571 | ||
3900898c | 572 | if (rate >= ath_rc_priv->rate_max_phy) { |
256b7759 | 573 | rate = ath_rc_priv->rate_max_phy; |
f078f209 LR |
574 | |
575 | /* Probe the next allowed phy state */ | |
f078f209 | 576 | if (ath_rc_get_nextvalid_txrate(rate_table, |
3900898c | 577 | ath_rc_priv, rate, &next_rate) && |
256b7759 | 578 | (now_msec - ath_rc_priv->probe_time > |
f078f209 | 579 | rate_table->probe_interval) && |
256b7759 | 580 | (ath_rc_priv->hw_maxretry_pktcnt >= 1)) { |
f078f209 | 581 | rate = next_rate; |
256b7759 S |
582 | ath_rc_priv->probe_rate = rate; |
583 | ath_rc_priv->probe_time = now_msec; | |
584 | ath_rc_priv->hw_maxretry_pktcnt = 0; | |
46d14a58 | 585 | *is_probing = 1; |
f078f209 LR |
586 | } |
587 | } | |
588 | ||
256b7759 S |
589 | if (rate > (ath_rc_priv->rate_table_size - 1)) |
590 | rate = ath_rc_priv->rate_table_size - 1; | |
f078f209 | 591 | |
e43419f9 LR |
592 | if (rate_table->info[rate].valid && |
593 | (ath_rc_priv->ht_cap & WLAN_RC_DS_FLAG)) | |
594 | return rate; | |
595 | ||
596 | if (rate_table->info[rate].valid_single_stream && | |
e55ea2b1 | 597 | !(ath_rc_priv->ht_cap & WLAN_RC_DS_FLAG)) |
e43419f9 LR |
598 | return rate; |
599 | ||
600 | /* This should not happen */ | |
601 | WARN_ON(1); | |
602 | ||
603 | rate = ath_rc_priv->valid_rate_index[0]; | |
f078f209 LR |
604 | |
605 | return rate; | |
606 | } | |
607 | ||
4f0fc7c3 | 608 | static void ath_rc_rate_set_series(const struct ath_rate_table *rate_table, |
a8efee4f | 609 | struct ieee80211_tx_rate *rate, |
c89424df | 610 | struct ieee80211_tx_rate_control *txrc, |
2c5a744d | 611 | u8 tries, u8 rix, int rtsctsenable) |
f078f209 | 612 | { |
a8efee4f | 613 | rate->count = tries; |
545750d3 | 614 | rate->idx = rate_table->info[rix].ratecode; |
a8efee4f | 615 | |
c89424df S |
616 | if (txrc->short_preamble) |
617 | rate->flags |= IEEE80211_TX_RC_USE_SHORT_PREAMBLE; | |
618 | if (txrc->rts || rtsctsenable) | |
a8efee4f | 619 | rate->flags |= IEEE80211_TX_RC_USE_RTS_CTS; |
545750d3 FF |
620 | |
621 | if (WLAN_RC_PHY_HT(rate_table->info[rix].phy)) { | |
a8efee4f | 622 | rate->flags |= IEEE80211_TX_RC_MCS; |
545750d3 FF |
623 | if (WLAN_RC_PHY_40(rate_table->info[rix].phy)) |
624 | rate->flags |= IEEE80211_TX_RC_40_MHZ_WIDTH; | |
625 | if (WLAN_RC_PHY_SGI(rate_table->info[rix].phy)) | |
626 | rate->flags |= IEEE80211_TX_RC_SHORT_GI; | |
627 | } | |
f078f209 LR |
628 | } |
629 | ||
c89424df | 630 | static void ath_rc_rate_set_rtscts(struct ath_softc *sc, |
4f0fc7c3 | 631 | const struct ath_rate_table *rate_table, |
c89424df S |
632 | struct ieee80211_tx_info *tx_info) |
633 | { | |
634 | struct ieee80211_tx_rate *rates = tx_info->control.rates; | |
635 | int i = 0, rix = 0, cix, enable_g_protection = 0; | |
636 | ||
637 | /* get the cix for the lowest valid rix */ | |
638 | for (i = 3; i >= 0; i--) { | |
639 | if (rates[i].count && (rates[i].idx >= 0)) { | |
545750d3 | 640 | rix = ath_rc_get_rateindex(rate_table, &rates[i]); |
c89424df S |
641 | break; |
642 | } | |
643 | } | |
644 | cix = rate_table->info[rix].ctrl_rate; | |
645 | ||
646 | /* All protection frames are transmited at 2Mb/s for 802.11g, | |
647 | * otherwise we transmit them at 1Mb/s */ | |
648 | if (sc->hw->conf.channel->band == IEEE80211_BAND_2GHZ && | |
649 | !conf_is_ht(&sc->hw->conf)) | |
650 | enable_g_protection = 1; | |
651 | ||
652 | /* | |
653 | * If 802.11g protection is enabled, determine whether to use RTS/CTS or | |
654 | * just CTS. Note that this is only done for OFDM/HT unicast frames. | |
655 | */ | |
656 | if ((sc->sc_flags & SC_OP_PROTECT_ENABLE) && | |
c89424df S |
657 | (rate_table->info[rix].phy == WLAN_RC_PHY_OFDM || |
658 | WLAN_RC_PHY_HT(rate_table->info[rix].phy))) { | |
659 | rates[0].flags |= IEEE80211_TX_RC_USE_CTS_PROTECT; | |
660 | cix = rate_table->info[enable_g_protection].ctrl_rate; | |
661 | } | |
662 | ||
663 | tx_info->control.rts_cts_rate_idx = cix; | |
664 | } | |
665 | ||
e25739a1 LR |
666 | static void ath_get_rate(void *priv, struct ieee80211_sta *sta, void *priv_sta, |
667 | struct ieee80211_tx_rate_control *txrc) | |
f078f209 | 668 | { |
e25739a1 LR |
669 | struct ath_softc *sc = priv; |
670 | struct ath_rate_priv *ath_rc_priv = priv_sta; | |
4f0fc7c3 | 671 | const struct ath_rate_table *rate_table; |
3900898c S |
672 | struct sk_buff *skb = txrc->skb; |
673 | struct ieee80211_tx_info *tx_info = IEEE80211_SKB_CB(skb); | |
a8efee4f | 674 | struct ieee80211_tx_rate *rates = tx_info->control.rates; |
c89424df S |
675 | struct ieee80211_hdr *hdr = (struct ieee80211_hdr *)skb->data; |
676 | __le16 fc = hdr->frame_control; | |
5c0ba62f | 677 | u8 try_per_rate, i = 0, rix; |
3900898c | 678 | int is_probe = 0; |
f078f209 | 679 | |
e25739a1 LR |
680 | if (rate_control_send_low(sta, priv_sta, txrc)) |
681 | return; | |
682 | ||
dd190183 LR |
683 | /* |
684 | * For Multi Rate Retry we use a different number of | |
685 | * retry attempt counts. This ends up looking like this: | |
686 | * | |
65896510 FF |
687 | * MRR[0] = 4 |
688 | * MRR[1] = 4 | |
689 | * MRR[2] = 4 | |
690 | * MRR[3] = 8 | |
dd190183 LR |
691 | * |
692 | */ | |
65896510 | 693 | try_per_rate = 4; |
dd190183 | 694 | |
40990ec0 | 695 | rate_table = sc->cur_rate_table; |
201c3b41 | 696 | rix = ath_rc_get_highest_rix(sc, ath_rc_priv, rate_table, &is_probe); |
f078f209 | 697 | |
b0a33448 LR |
698 | /* |
699 | * If we're in HT mode and both us and our peer supports LDPC. | |
700 | * We don't need to check our own device's capabilities as our own | |
701 | * ht capabilities would have already been intersected with our peer's. | |
702 | */ | |
703 | if (conf_is_ht(&sc->hw->conf) && | |
704 | (sta->ht_cap.cap & IEEE80211_HT_CAP_LDPC_CODING)) | |
705 | tx_info->flags |= IEEE80211_TX_CTL_LDPC; | |
706 | ||
58b5190e FF |
707 | if (conf_is_ht(&sc->hw->conf) && |
708 | (sta->ht_cap.cap & IEEE80211_HT_CAP_TX_STBC)) | |
709 | tx_info->flags |= (1 << IEEE80211_TX_CTL_STBC_SHIFT); | |
710 | ||
3900898c | 711 | if (is_probe) { |
f078f209 LR |
712 | /* set one try for probe rates. For the |
713 | * probes don't enable rts */ | |
c89424df | 714 | ath_rc_rate_set_series(rate_table, &rates[i++], txrc, |
5c0ba62f | 715 | 1, rix, 0); |
f078f209 | 716 | |
f078f209 LR |
717 | /* Get the next tried/allowed rate. No RTS for the next series |
718 | * after the probe rate | |
719 | */ | |
5c0ba62f | 720 | ath_rc_get_lower_rix(rate_table, ath_rc_priv, rix, &rix); |
c89424df | 721 | ath_rc_rate_set_series(rate_table, &rates[i++], txrc, |
5c0ba62f | 722 | try_per_rate, rix, 0); |
14587ce2 VT |
723 | |
724 | tx_info->flags |= IEEE80211_TX_CTL_RATE_CTRL_PROBE; | |
f078f209 | 725 | } else { |
f078f209 | 726 | /* Set the choosen rate. No RTS for first series entry. */ |
c89424df | 727 | ath_rc_rate_set_series(rate_table, &rates[i++], txrc, |
5c0ba62f | 728 | try_per_rate, rix, 0); |
f078f209 LR |
729 | } |
730 | ||
731 | /* Fill in the other rates for multirate retry */ | |
3900898c | 732 | for ( ; i < 4; i++) { |
dd190183 LR |
733 | /* Use twice the number of tries for the last MRR segment. */ |
734 | if (i + 1 == 4) | |
65896510 | 735 | try_per_rate = 8; |
dd190183 | 736 | |
5c0ba62f | 737 | ath_rc_get_lower_rix(rate_table, ath_rc_priv, rix, &rix); |
f078f209 | 738 | /* All other rates in the series have RTS enabled */ |
c89424df | 739 | ath_rc_rate_set_series(rate_table, &rates[i], txrc, |
5c0ba62f | 740 | try_per_rate, rix, 1); |
f078f209 LR |
741 | } |
742 | ||
743 | /* | |
744 | * NB:Change rate series to enable aggregation when operating | |
745 | * at lower MCS rates. When first rate in series is MCS2 | |
746 | * in HT40 @ 2.4GHz, series should look like: | |
747 | * | |
748 | * {MCS2, MCS1, MCS0, MCS0}. | |
749 | * | |
750 | * When first rate in series is MCS3 in HT20 @ 2.4GHz, series should | |
751 | * look like: | |
752 | * | |
753 | * {MCS3, MCS2, MCS1, MCS1} | |
754 | * | |
755 | * So, set fourth rate in series to be same as third one for | |
756 | * above conditions. | |
757 | */ | |
3706de6f | 758 | if ((sc->hw->conf.channel->band == IEEE80211_BAND_2GHZ) && |
ecf70441 | 759 | (conf_is_ht(&sc->hw->conf))) { |
40990ec0 | 760 | u8 dot11rate = rate_table->info[rix].dot11rate; |
f078f209 LR |
761 | u8 phy = rate_table->info[rix].phy; |
762 | if (i == 4 && | |
763 | ((dot11rate == 2 && phy == WLAN_RC_PHY_HT_40_SS) || | |
dc2222a8 | 764 | (dot11rate == 3 && phy == WLAN_RC_PHY_HT_20_SS))) { |
a8efee4f S |
765 | rates[3].idx = rates[2].idx; |
766 | rates[3].flags = rates[2].flags; | |
f078f209 LR |
767 | } |
768 | } | |
c89424df S |
769 | |
770 | /* | |
771 | * Force hardware to use computed duration for next | |
772 | * fragment by disabling multi-rate retry, which | |
773 | * updates duration based on the multi-rate duration table. | |
774 | * | |
775 | * FIXME: Fix duration | |
776 | */ | |
7682a76d LR |
777 | if (ieee80211_has_morefrags(fc) || |
778 | (le16_to_cpu(hdr->seq_ctrl) & IEEE80211_SCTL_FRAG)) { | |
c89424df S |
779 | rates[1].count = rates[2].count = rates[3].count = 0; |
780 | rates[1].idx = rates[2].idx = rates[3].idx = 0; | |
781 | rates[0].count = ATH_TXMAXTRY; | |
782 | } | |
783 | ||
784 | /* Setup RTS/CTS */ | |
785 | ath_rc_rate_set_rtscts(sc, rate_table, tx_info); | |
f078f209 LR |
786 | } |
787 | ||
2c5a744d | 788 | static bool ath_rc_update_per(struct ath_softc *sc, |
4f0fc7c3 | 789 | const struct ath_rate_table *rate_table, |
2c5a744d | 790 | struct ath_rate_priv *ath_rc_priv, |
827e69bf | 791 | struct ieee80211_tx_info *tx_info, |
2c5a744d S |
792 | int tx_rate, int xretries, int retries, |
793 | u32 now_msec) | |
f078f209 | 794 | { |
2c5a744d | 795 | bool state_change = false; |
827e69bf | 796 | int count, n_bad_frames; |
f078f209 | 797 | u8 last_per; |
f078f209 LR |
798 | static u32 nretry_to_per_lookup[10] = { |
799 | 100 * 0 / 1, | |
800 | 100 * 1 / 4, | |
801 | 100 * 1 / 2, | |
802 | 100 * 3 / 4, | |
803 | 100 * 4 / 5, | |
804 | 100 * 5 / 6, | |
805 | 100 * 6 / 7, | |
806 | 100 * 7 / 8, | |
807 | 100 * 8 / 9, | |
808 | 100 * 9 / 10 | |
809 | }; | |
810 | ||
922bac60 | 811 | last_per = ath_rc_priv->per[tx_rate]; |
827e69bf | 812 | n_bad_frames = tx_info->status.ampdu_len - tx_info->status.ampdu_ack_len; |
f078f209 LR |
813 | |
814 | if (xretries) { | |
f078f209 | 815 | if (xretries == 1) { |
922bac60 VT |
816 | ath_rc_priv->per[tx_rate] += 30; |
817 | if (ath_rc_priv->per[tx_rate] > 100) | |
818 | ath_rc_priv->per[tx_rate] = 100; | |
f078f209 LR |
819 | } else { |
820 | /* xretries == 2 */ | |
87c1687d | 821 | count = ARRAY_SIZE(nretry_to_per_lookup); |
f078f209 LR |
822 | if (retries >= count) |
823 | retries = count - 1; | |
2c5a744d | 824 | |
f078f209 | 825 | /* new_PER = 7/8*old_PER + 1/8*(currentPER) */ |
922bac60 | 826 | ath_rc_priv->per[tx_rate] = |
2c5a744d | 827 | (u8)(last_per - (last_per >> 3) + (100 >> 3)); |
f078f209 LR |
828 | } |
829 | ||
830 | /* xretries == 1 or 2 */ | |
831 | ||
256b7759 S |
832 | if (ath_rc_priv->probe_rate == tx_rate) |
833 | ath_rc_priv->probe_rate = 0; | |
f078f209 | 834 | |
2c5a744d | 835 | } else { /* xretries == 0 */ |
87c1687d | 836 | count = ARRAY_SIZE(nretry_to_per_lookup); |
f078f209 LR |
837 | if (retries >= count) |
838 | retries = count - 1; | |
2c5a744d | 839 | |
827e69bf | 840 | if (n_bad_frames) { |
dc2222a8 | 841 | /* new_PER = 7/8*old_PER + 1/8*(currentPER) |
f078f209 LR |
842 | * Assuming that n_frames is not 0. The current PER |
843 | * from the retries is 100 * retries / (retries+1), | |
844 | * since the first retries attempts failed, and the | |
845 | * next one worked. For the one that worked, | |
846 | * n_bad_frames subframes out of n_frames wored, | |
847 | * so the PER for that part is | |
848 | * 100 * n_bad_frames / n_frames, and it contributes | |
849 | * 100 * n_bad_frames / (n_frames * (retries+1)) to | |
850 | * the above PER. The expression below is a | |
851 | * simplified version of the sum of these two terms. | |
852 | */ | |
827e69bf FF |
853 | if (tx_info->status.ampdu_len > 0) { |
854 | int n_frames, n_bad_tries; | |
2c5a744d S |
855 | u8 cur_per, new_per; |
856 | ||
827e69bf FF |
857 | n_bad_tries = retries * tx_info->status.ampdu_len + |
858 | n_bad_frames; | |
859 | n_frames = tx_info->status.ampdu_len * (retries + 1); | |
860 | cur_per = (100 * n_bad_tries / n_frames) >> 3; | |
2c5a744d | 861 | new_per = (u8)(last_per - (last_per >> 3) + cur_per); |
922bac60 | 862 | ath_rc_priv->per[tx_rate] = new_per; |
2c5a744d | 863 | } |
f078f209 | 864 | } else { |
922bac60 | 865 | ath_rc_priv->per[tx_rate] = |
2c5a744d S |
866 | (u8)(last_per - (last_per >> 3) + |
867 | (nretry_to_per_lookup[retries] >> 3)); | |
f078f209 LR |
868 | } |
869 | ||
f078f209 LR |
870 | |
871 | /* | |
872 | * If we got at most one retry then increase the max rate if | |
873 | * this was a probe. Otherwise, ignore the probe. | |
874 | */ | |
256b7759 | 875 | if (ath_rc_priv->probe_rate && ath_rc_priv->probe_rate == tx_rate) { |
827e69bf | 876 | if (retries > 0 || 2 * n_bad_frames > tx_info->status.ampdu_len) { |
f078f209 LR |
877 | /* |
878 | * Since we probed with just a single attempt, | |
879 | * any retries means the probe failed. Also, | |
880 | * if the attempt worked, but more than half | |
881 | * the subframes were bad then also consider | |
882 | * the probe a failure. | |
883 | */ | |
256b7759 | 884 | ath_rc_priv->probe_rate = 0; |
f078f209 LR |
885 | } else { |
886 | u8 probe_rate = 0; | |
887 | ||
2c5a744d S |
888 | ath_rc_priv->rate_max_phy = |
889 | ath_rc_priv->probe_rate; | |
256b7759 | 890 | probe_rate = ath_rc_priv->probe_rate; |
f078f209 | 891 | |
922bac60 VT |
892 | if (ath_rc_priv->per[probe_rate] > 30) |
893 | ath_rc_priv->per[probe_rate] = 20; | |
f078f209 | 894 | |
256b7759 | 895 | ath_rc_priv->probe_rate = 0; |
f078f209 LR |
896 | |
897 | /* | |
898 | * Since this probe succeeded, we allow the next | |
899 | * probe twice as soon. This allows the maxRate | |
900 | * to move up faster if the probes are | |
af901ca1 | 901 | * successful. |
f078f209 | 902 | */ |
2c5a744d S |
903 | ath_rc_priv->probe_time = |
904 | now_msec - rate_table->probe_interval / 2; | |
f078f209 LR |
905 | } |
906 | } | |
907 | ||
908 | if (retries > 0) { | |
909 | /* | |
910 | * Don't update anything. We don't know if | |
911 | * this was because of collisions or poor signal. | |
f078f209 | 912 | */ |
256b7759 | 913 | ath_rc_priv->hw_maxretry_pktcnt = 0; |
f078f209 LR |
914 | } else { |
915 | /* | |
916 | * It worked with no retries. First ignore bogus (small) | |
917 | * rssi_ack values. | |
918 | */ | |
256b7759 S |
919 | if (tx_rate == ath_rc_priv->rate_max_phy && |
920 | ath_rc_priv->hw_maxretry_pktcnt < 255) { | |
921 | ath_rc_priv->hw_maxretry_pktcnt++; | |
f078f209 LR |
922 | } |
923 | ||
f078f209 LR |
924 | } |
925 | } | |
39a4cafe | 926 | |
2c5a744d S |
927 | return state_change; |
928 | } | |
929 | ||
930 | /* Update PER, RSSI and whatever else that the code thinks it is doing. | |
931 | If you can make sense of all this, you really need to go out more. */ | |
932 | ||
933 | static void ath_rc_update_ht(struct ath_softc *sc, | |
934 | struct ath_rate_priv *ath_rc_priv, | |
827e69bf | 935 | struct ieee80211_tx_info *tx_info, |
2c5a744d S |
936 | int tx_rate, int xretries, int retries) |
937 | { | |
2c5a744d S |
938 | u32 now_msec = jiffies_to_msecs(jiffies); |
939 | int rate; | |
940 | u8 last_per; | |
941 | bool state_change = false; | |
4f0fc7c3 | 942 | const struct ath_rate_table *rate_table = sc->cur_rate_table; |
2c5a744d S |
943 | int size = ath_rc_priv->rate_table_size; |
944 | ||
945 | if ((tx_rate < 0) || (tx_rate > rate_table->rate_cnt)) | |
946 | return; | |
f078f209 | 947 | |
922bac60 | 948 | last_per = ath_rc_priv->per[tx_rate]; |
2c5a744d S |
949 | |
950 | /* Update PER first */ | |
951 | state_change = ath_rc_update_per(sc, rate_table, ath_rc_priv, | |
827e69bf | 952 | tx_info, tx_rate, xretries, |
2c5a744d | 953 | retries, now_msec); |
f078f209 LR |
954 | |
955 | /* | |
956 | * If this rate looks bad (high PER) then stop using it for | |
957 | * a while (except if we are probing). | |
958 | */ | |
922bac60 | 959 | if (ath_rc_priv->per[tx_rate] >= 55 && tx_rate > 0 && |
dc2222a8 | 960 | rate_table->info[tx_rate].ratekbps <= |
256b7759 | 961 | rate_table->info[ath_rc_priv->rate_max_phy].ratekbps) { |
39448b0a LR |
962 | ath_rc_get_lower_rix(rate_table, ath_rc_priv, |
963 | (u8)tx_rate, &ath_rc_priv->rate_max_phy); | |
f078f209 LR |
964 | |
965 | /* Don't probe for a little while. */ | |
256b7759 | 966 | ath_rc_priv->probe_time = now_msec; |
f078f209 LR |
967 | } |
968 | ||
f078f209 LR |
969 | /* Make sure the rates below this have lower PER */ |
970 | /* Monotonicity is kept only for rates below the current rate. */ | |
922bac60 | 971 | if (ath_rc_priv->per[tx_rate] < last_per) { |
f078f209 | 972 | for (rate = tx_rate - 1; rate >= 0; rate--) { |
f078f209 | 973 | |
922bac60 VT |
974 | if (ath_rc_priv->per[rate] > |
975 | ath_rc_priv->per[rate+1]) { | |
976 | ath_rc_priv->per[rate] = | |
977 | ath_rc_priv->per[rate+1]; | |
f078f209 LR |
978 | } |
979 | } | |
980 | } | |
981 | ||
982 | /* Maintain monotonicity for rates above the current rate */ | |
2c5a744d | 983 | for (rate = tx_rate; rate < size - 1; rate++) { |
922bac60 VT |
984 | if (ath_rc_priv->per[rate+1] < |
985 | ath_rc_priv->per[rate]) | |
986 | ath_rc_priv->per[rate+1] = | |
987 | ath_rc_priv->per[rate]; | |
f078f209 LR |
988 | } |
989 | ||
f078f209 LR |
990 | /* Every so often, we reduce the thresholds |
991 | * and PER (different for CCK and OFDM). */ | |
256b7759 | 992 | if (now_msec - ath_rc_priv->per_down_time >= |
c4130465 | 993 | rate_table->probe_interval) { |
2c5a744d | 994 | for (rate = 0; rate < size; rate++) { |
922bac60 VT |
995 | ath_rc_priv->per[rate] = |
996 | 7 * ath_rc_priv->per[rate] / 8; | |
f078f209 LR |
997 | } |
998 | ||
256b7759 | 999 | ath_rc_priv->per_down_time = now_msec; |
f078f209 | 1000 | } |
2c5a744d | 1001 | |
9e712790 | 1002 | ath_debug_stat_retries(sc, tx_rate, xretries, retries, |
922bac60 | 1003 | ath_rc_priv->per[tx_rate]); |
029bc432 | 1004 | |
2c5a744d S |
1005 | } |
1006 | ||
4f0fc7c3 | 1007 | static int ath_rc_get_rateindex(const struct ath_rate_table *rate_table, |
2c5a744d S |
1008 | struct ieee80211_tx_rate *rate) |
1009 | { | |
1010 | int rix; | |
1011 | ||
545750d3 FF |
1012 | if (!(rate->flags & IEEE80211_TX_RC_MCS)) |
1013 | return rate->idx; | |
1014 | ||
1015 | rix = rate->idx + rate_table->mcs_start; | |
2c5a744d S |
1016 | if ((rate->flags & IEEE80211_TX_RC_40_MHZ_WIDTH) && |
1017 | (rate->flags & IEEE80211_TX_RC_SHORT_GI)) | |
545750d3 | 1018 | rix = rate_table->info[rix].ht_index; |
2c5a744d | 1019 | else if (rate->flags & IEEE80211_TX_RC_SHORT_GI) |
545750d3 | 1020 | rix = rate_table->info[rix].sgi_index; |
2c5a744d | 1021 | else if (rate->flags & IEEE80211_TX_RC_40_MHZ_WIDTH) |
545750d3 | 1022 | rix = rate_table->info[rix].cw40index; |
2c5a744d | 1023 | else |
545750d3 | 1024 | rix = rate_table->info[rix].base_index; |
2c5a744d S |
1025 | |
1026 | return rix; | |
f078f209 LR |
1027 | } |
1028 | ||
46d14a58 S |
1029 | static void ath_rc_tx_status(struct ath_softc *sc, |
1030 | struct ath_rate_priv *ath_rc_priv, | |
1031 | struct ieee80211_tx_info *tx_info, | |
1032 | int final_ts_idx, int xretries, int long_retry) | |
f078f209 | 1033 | { |
4f0fc7c3 | 1034 | const struct ath_rate_table *rate_table; |
a8efee4f | 1035 | struct ieee80211_tx_rate *rates = tx_info->status.rates; |
f078f209 | 1036 | u8 flags; |
2c5a744d | 1037 | u32 i = 0, rix; |
f078f209 | 1038 | |
40990ec0 | 1039 | rate_table = sc->cur_rate_table; |
f078f209 LR |
1040 | |
1041 | /* | |
1042 | * If the first rate is not the final index, there | |
1043 | * are intermediate rate failures to be processed. | |
1044 | */ | |
1045 | if (final_ts_idx != 0) { | |
1046 | /* Process intermediate rates that failed.*/ | |
2c5a744d S |
1047 | for (i = 0; i < final_ts_idx ; i++) { |
1048 | if (rates[i].count != 0 && (rates[i].idx >= 0)) { | |
1049 | flags = rates[i].flags; | |
1050 | ||
f078f209 LR |
1051 | /* If HT40 and we have switched mode from |
1052 | * 40 to 20 => don't update */ | |
2c5a744d | 1053 | |
a8efee4f | 1054 | if ((flags & IEEE80211_TX_RC_40_MHZ_WIDTH) && |
f5c38ef0 | 1055 | !(ath_rc_priv->ht_cap & WLAN_RC_40_FLAG)) |
f078f209 | 1056 | return; |
e63835b0 | 1057 | |
2c5a744d | 1058 | rix = ath_rc_get_rateindex(rate_table, &rates[i]); |
827e69bf FF |
1059 | ath_rc_update_ht(sc, ath_rc_priv, tx_info, |
1060 | rix, xretries ? 1 : 2, | |
2c5a744d | 1061 | rates[i].count); |
f078f209 LR |
1062 | } |
1063 | } | |
1064 | } else { | |
1065 | /* | |
1066 | * Handle the special case of MIMO PS burst, where the second | |
1067 | * aggregate is sent out with only one rate and one try. | |
1068 | * Treating it as an excessive retry penalizes the rate | |
1069 | * inordinately. | |
1070 | */ | |
a8efee4f | 1071 | if (rates[0].count == 1 && xretries == 1) |
f078f209 LR |
1072 | xretries = 2; |
1073 | } | |
1074 | ||
2c5a744d S |
1075 | flags = rates[i].flags; |
1076 | ||
f078f209 | 1077 | /* If HT40 and we have switched mode from 40 to 20 => don't update */ |
a8efee4f | 1078 | if ((flags & IEEE80211_TX_RC_40_MHZ_WIDTH) && |
f5c38ef0 | 1079 | !(ath_rc_priv->ht_cap & WLAN_RC_40_FLAG)) |
f078f209 LR |
1080 | return; |
1081 | ||
2c5a744d | 1082 | rix = ath_rc_get_rateindex(rate_table, &rates[i]); |
827e69bf | 1083 | ath_rc_update_ht(sc, ath_rc_priv, tx_info, rix, xretries, long_retry); |
f078f209 LR |
1084 | } |
1085 | ||
4f0fc7c3 LR |
1086 | static const |
1087 | struct ath_rate_table *ath_choose_rate_table(struct ath_softc *sc, | |
1088 | enum ieee80211_band band, | |
1089 | bool is_ht, | |
1090 | bool is_cw_40) | |
e11602b7 S |
1091 | { |
1092 | int mode = 0; | |
c46917bb | 1093 | struct ath_common *common = ath9k_hw_common(sc->sc_ah); |
e11602b7 S |
1094 | |
1095 | switch(band) { | |
1096 | case IEEE80211_BAND_2GHZ: | |
1097 | mode = ATH9K_MODE_11G; | |
1098 | if (is_ht) | |
1099 | mode = ATH9K_MODE_11NG_HT20; | |
1100 | if (is_cw_40) | |
1101 | mode = ATH9K_MODE_11NG_HT40PLUS; | |
1102 | break; | |
1103 | case IEEE80211_BAND_5GHZ: | |
1104 | mode = ATH9K_MODE_11A; | |
1105 | if (is_ht) | |
1106 | mode = ATH9K_MODE_11NA_HT20; | |
1107 | if (is_cw_40) | |
1108 | mode = ATH9K_MODE_11NA_HT40PLUS; | |
1109 | break; | |
1110 | default: | |
c46917bb | 1111 | ath_print(common, ATH_DBG_CONFIG, "Invalid band\n"); |
e11602b7 S |
1112 | return NULL; |
1113 | } | |
1114 | ||
1115 | BUG_ON(mode >= ATH9K_MODE_MAX); | |
1116 | ||
c46917bb LR |
1117 | ath_print(common, ATH_DBG_CONFIG, |
1118 | "Choosing rate table for mode: %d\n", mode); | |
545750d3 FF |
1119 | |
1120 | sc->cur_rate_mode = mode; | |
1121 | return hw_rate_table[mode]; | |
e11602b7 S |
1122 | } |
1123 | ||
5ddfac3b | 1124 | static void ath_rc_init(struct ath_softc *sc, |
46d14a58 | 1125 | struct ath_rate_priv *ath_rc_priv, |
5ddfac3b | 1126 | struct ieee80211_supported_band *sband, |
9331ec80 | 1127 | struct ieee80211_sta *sta, |
4f0fc7c3 | 1128 | const struct ath_rate_table *rate_table) |
f078f209 | 1129 | { |
5ddfac3b | 1130 | struct ath_rateset *rateset = &ath_rc_priv->neg_rates; |
c46917bb | 1131 | struct ath_common *common = ath9k_hw_common(sc->sc_ah); |
5ddfac3b | 1132 | u8 *ht_mcs = (u8 *)&ath_rc_priv->neg_ht_rates; |
f078f209 | 1133 | u8 i, j, k, hi = 0, hthi = 0; |
f078f209 LR |
1134 | |
1135 | /* Initial rate table size. Will change depending | |
1136 | * on the working rate set */ | |
46d14a58 | 1137 | ath_rc_priv->rate_table_size = RATE_TABLE_SIZE; |
f078f209 LR |
1138 | |
1139 | /* Initialize thresholds according to the global rate table */ | |
5ddfac3b | 1140 | for (i = 0 ; i < ath_rc_priv->rate_table_size; i++) { |
922bac60 | 1141 | ath_rc_priv->per[i] = 0; |
f078f209 LR |
1142 | } |
1143 | ||
1144 | /* Determine the valid rates */ | |
256b7759 | 1145 | ath_rc_init_valid_txmask(ath_rc_priv); |
f078f209 LR |
1146 | |
1147 | for (i = 0; i < WLAN_RC_PHY_MAX; i++) { | |
1148 | for (j = 0; j < MAX_TX_RATE_PHY; j++) | |
256b7759 S |
1149 | ath_rc_priv->valid_phy_rateidx[i][j] = 0; |
1150 | ath_rc_priv->valid_phy_ratecnt[i] = 0; | |
f078f209 | 1151 | } |
f078f209 | 1152 | |
f078f209 LR |
1153 | if (!rateset->rs_nrates) { |
1154 | /* No working rate, just initialize valid rates */ | |
2c5a744d | 1155 | hi = ath_rc_init_validrates(ath_rc_priv, rate_table, |
c89424df | 1156 | ath_rc_priv->ht_cap); |
f078f209 LR |
1157 | } else { |
1158 | /* Use intersection of working rates and valid rates */ | |
2c5a744d | 1159 | hi = ath_rc_setvalid_rates(ath_rc_priv, rate_table, |
c89424df | 1160 | rateset, ath_rc_priv->ht_cap); |
5ddfac3b | 1161 | if (ath_rc_priv->ht_cap & WLAN_RC_HT_FLAG) { |
2c5a744d | 1162 | hthi = ath_rc_setvalid_htrates(ath_rc_priv, |
c89424df S |
1163 | rate_table, |
1164 | ht_mcs, | |
1165 | ath_rc_priv->ht_cap); | |
f078f209 LR |
1166 | } |
1167 | hi = A_MAX(hi, hthi); | |
1168 | } | |
1169 | ||
256b7759 S |
1170 | ath_rc_priv->rate_table_size = hi + 1; |
1171 | ath_rc_priv->rate_max_phy = 0; | |
9680e8a3 | 1172 | BUG_ON(ath_rc_priv->rate_table_size > RATE_TABLE_SIZE); |
f078f209 LR |
1173 | |
1174 | for (i = 0, k = 0; i < WLAN_RC_PHY_MAX; i++) { | |
256b7759 S |
1175 | for (j = 0; j < ath_rc_priv->valid_phy_ratecnt[i]; j++) { |
1176 | ath_rc_priv->valid_rate_index[k++] = | |
1177 | ath_rc_priv->valid_phy_rateidx[i][j]; | |
f078f209 LR |
1178 | } |
1179 | ||
46d14a58 | 1180 | if (!ath_rc_valid_phyrate(i, rate_table->initial_ratemax, 1) |
256b7759 | 1181 | || !ath_rc_priv->valid_phy_ratecnt[i]) |
f078f209 LR |
1182 | continue; |
1183 | ||
256b7759 | 1184 | ath_rc_priv->rate_max_phy = ath_rc_priv->valid_phy_rateidx[i][j-1]; |
f078f209 | 1185 | } |
9680e8a3 LR |
1186 | BUG_ON(ath_rc_priv->rate_table_size > RATE_TABLE_SIZE); |
1187 | BUG_ON(k > RATE_TABLE_SIZE); | |
f078f209 | 1188 | |
256b7759 | 1189 | ath_rc_priv->max_valid_rate = k; |
256b7759 S |
1190 | ath_rc_sort_validrates(rate_table, ath_rc_priv); |
1191 | ath_rc_priv->rate_max_phy = ath_rc_priv->valid_rate_index[k-4]; | |
40990ec0 | 1192 | sc->cur_rate_table = rate_table; |
9331ec80 | 1193 | |
c46917bb LR |
1194 | ath_print(common, ATH_DBG_CONFIG, |
1195 | "RC Initialized with capabilities: 0x%x\n", | |
1196 | ath_rc_priv->ht_cap); | |
f078f209 LR |
1197 | } |
1198 | ||
c2da50e5 | 1199 | static u8 ath_rc_build_ht_caps(struct ath_softc *sc, struct ieee80211_sta *sta, |
6473d24d | 1200 | bool is_cw40, bool is_sgi) |
9331ec80 S |
1201 | { |
1202 | u8 caps = 0; | |
1203 | ||
c2da50e5 | 1204 | if (sta->ht_cap.ht_supported) { |
9331ec80 S |
1205 | caps = WLAN_RC_HT_FLAG; |
1206 | if (sc->sc_ah->caps.tx_chainmask != 1 && | |
c2da50e5 S |
1207 | ath9k_hw_getcapability(sc->sc_ah, ATH9K_CAP_DS, 0, NULL)) { |
1208 | if (sta->ht_cap.mcs.rx_mask[1]) | |
1209 | caps |= WLAN_RC_DS_FLAG; | |
1210 | } | |
9331ec80 S |
1211 | if (is_cw40) |
1212 | caps |= WLAN_RC_40_FLAG; | |
6473d24d | 1213 | if (is_sgi) |
9331ec80 | 1214 | caps |= WLAN_RC_SGI_FLAG; |
6473d24d | 1215 | |
9331ec80 S |
1216 | } |
1217 | ||
1218 | return caps; | |
1219 | } | |
1220 | ||
1221 | /***********************************/ | |
1222 | /* mac80211 Rate Control callbacks */ | |
1223 | /***********************************/ | |
1224 | ||
4b7679a5 JB |
1225 | static void ath_tx_status(void *priv, struct ieee80211_supported_band *sband, |
1226 | struct ieee80211_sta *sta, void *priv_sta, | |
f078f209 LR |
1227 | struct sk_buff *skb) |
1228 | { | |
1229 | struct ath_softc *sc = priv; | |
46d14a58 | 1230 | struct ath_rate_priv *ath_rc_priv = priv_sta; |
f078f209 LR |
1231 | struct ieee80211_tx_info *tx_info = IEEE80211_SKB_CB(skb); |
1232 | struct ieee80211_hdr *hdr; | |
827e69bf FF |
1233 | int final_ts_idx = 0, tx_status = 0, is_underrun = 0; |
1234 | int long_retry = 0; | |
f078f209 | 1235 | __le16 fc; |
827e69bf | 1236 | int i; |
f078f209 | 1237 | |
f078f209 LR |
1238 | hdr = (struct ieee80211_hdr *)skb->data; |
1239 | fc = hdr->frame_control; | |
827e69bf FF |
1240 | for (i = 0; i < IEEE80211_TX_MAX_RATES; i++) { |
1241 | struct ieee80211_tx_rate *rate = &tx_info->status.rates[i]; | |
1242 | if (!rate->count) | |
1243 | break; | |
1244 | ||
1245 | final_ts_idx = i; | |
1246 | long_retry = rate->count - 1; | |
1247 | } | |
f078f209 | 1248 | |
d969847c FF |
1249 | if (!priv_sta || !ieee80211_is_data(fc)) |
1250 | return; | |
1251 | ||
1252 | /* This packet was aggregated but doesn't carry status info */ | |
1253 | if ((tx_info->flags & IEEE80211_TX_CTL_AMPDU) && | |
1254 | !(tx_info->flags & IEEE80211_TX_STAT_AMPDU)) | |
827e69bf | 1255 | return; |
e6a9854b | 1256 | |
827e69bf FF |
1257 | if (tx_info->flags & IEEE80211_TX_STAT_TX_FILTERED) |
1258 | return; | |
e6a9854b | 1259 | |
46d14a58 | 1260 | /* |
f4709fdf LR |
1261 | * If an underrun error is seen assume it as an excessive retry only |
1262 | * if max frame trigger level has been reached (2 KB for singel stream, | |
1263 | * and 4 KB for dual stream). Adjust the long retry as if the frame was | |
1264 | * tried hw->max_rate_tries times to affect how ratectrl updates PER for | |
1265 | * the failed rate. In case of congestion on the bus penalizing these | |
1266 | * type of underruns should help hardware actually transmit new frames | |
1267 | * successfully by eventually preferring slower rates. This itself | |
1268 | * should also alleviate congestion on the bus. | |
46d14a58 | 1269 | */ |
827e69bf FF |
1270 | if ((tx_info->pad[0] & ATH_TX_INFO_UNDERRUN) && |
1271 | (sc->sc_ah->tx_trig_level >= ath_rc_priv->tx_triglevel_max)) { | |
46d14a58 S |
1272 | tx_status = 1; |
1273 | is_underrun = 1; | |
1274 | } | |
1275 | ||
827e69bf | 1276 | if (tx_info->pad[0] & ATH_TX_INFO_XRETRY) |
46d14a58 S |
1277 | tx_status = 1; |
1278 | ||
1279 | ath_rc_tx_status(sc, ath_rc_priv, tx_info, final_ts_idx, tx_status, | |
827e69bf | 1280 | (is_underrun) ? sc->hw->max_rate_tries : long_retry); |
46d14a58 | 1281 | |
d22b0022 | 1282 | /* Check if aggregation has to be enabled for this tid */ |
d5c232ff VT |
1283 | if (conf_is_ht(&sc->hw->conf) && |
1284 | !(skb->protocol == cpu_to_be16(ETH_P_PAE))) { | |
d22b0022 S |
1285 | if (ieee80211_is_data_qos(fc)) { |
1286 | u8 *qc, tid; | |
1287 | struct ath_node *an; | |
1288 | ||
1289 | qc = ieee80211_get_qos_ctl(hdr); | |
1290 | tid = qc[0] & 0xf; | |
1291 | an = (struct ath_node *)sta->drv_priv; | |
1292 | ||
1293 | if(ath_tx_aggr_check(sc, an, tid)) | |
c951ad35 | 1294 | ieee80211_start_tx_ba_session(sta, tid); |
d22b0022 S |
1295 | } |
1296 | } | |
7a7dec65 | 1297 | |
545750d3 FF |
1298 | ath_debug_stat_rc(sc, ath_rc_get_rateindex(sc->cur_rate_table, |
1299 | &tx_info->status.rates[final_ts_idx])); | |
f078f209 LR |
1300 | } |
1301 | ||
4b7679a5 JB |
1302 | static void ath_rate_init(void *priv, struct ieee80211_supported_band *sband, |
1303 | struct ieee80211_sta *sta, void *priv_sta) | |
f078f209 | 1304 | { |
4b7679a5 | 1305 | struct ath_softc *sc = priv; |
46d14a58 | 1306 | struct ath_rate_priv *ath_rc_priv = priv_sta; |
545750d3 | 1307 | const struct ath_rate_table *rate_table; |
6473d24d | 1308 | bool is_cw40, is_sgi = false; |
f078f209 LR |
1309 | int i, j = 0; |
1310 | ||
7b4d2735 S |
1311 | for (i = 0; i < sband->n_bitrates; i++) { |
1312 | if (sta->supp_rates[sband->band] & BIT(i)) { | |
1313 | ath_rc_priv->neg_rates.rs_rates[j] | |
1314 | = (sband->bitrates[i].bitrate * 2) / 10; | |
1315 | j++; | |
1316 | } | |
1317 | } | |
1318 | ath_rc_priv->neg_rates.rs_nrates = j; | |
f078f209 | 1319 | |
a4510bf8 | 1320 | if (sta->ht_cap.ht_supported) { |
7b4d2735 | 1321 | for (i = 0, j = 0; i < 77; i++) { |
ae5eb026 | 1322 | if (sta->ht_cap.mcs.rx_mask[i/8] & (1<<(i%8))) |
dc2222a8 | 1323 | ath_rc_priv->neg_ht_rates.rs_rates[j++] = i; |
f078f209 LR |
1324 | if (j == ATH_RATE_MAX) |
1325 | break; | |
1326 | } | |
dc2222a8 | 1327 | ath_rc_priv->neg_ht_rates.rs_nrates = j; |
f078f209 | 1328 | } |
7b4d2735 | 1329 | |
9331ec80 | 1330 | is_cw40 = sta->ht_cap.cap & IEEE80211_HT_CAP_SUP_WIDTH_20_40; |
6473d24d VT |
1331 | |
1332 | if (is_cw40) | |
1333 | is_sgi = sta->ht_cap.cap & IEEE80211_HT_CAP_SGI_40; | |
1334 | else if (sc->sc_ah->caps.hw_caps & ATH9K_HW_CAP_SGI_20) | |
1335 | is_sgi = sta->ht_cap.cap & IEEE80211_HT_CAP_SGI_20; | |
9331ec80 S |
1336 | |
1337 | /* Choose rate table first */ | |
1338 | ||
1339 | if ((sc->sc_ah->opmode == NL80211_IFTYPE_STATION) || | |
9cb5412b | 1340 | (sc->sc_ah->opmode == NL80211_IFTYPE_MESH_POINT) || |
9331ec80 S |
1341 | (sc->sc_ah->opmode == NL80211_IFTYPE_ADHOC)) { |
1342 | rate_table = ath_choose_rate_table(sc, sband->band, | |
545750d3 FF |
1343 | sta->ht_cap.ht_supported, is_cw40); |
1344 | } else { | |
1345 | rate_table = hw_rate_table[sc->cur_rate_mode]; | |
9331ec80 S |
1346 | } |
1347 | ||
6473d24d | 1348 | ath_rc_priv->ht_cap = ath_rc_build_ht_caps(sc, sta, is_cw40, is_sgi); |
9331ec80 S |
1349 | ath_rc_init(sc, priv_sta, sband, sta, rate_table); |
1350 | } | |
1351 | ||
1352 | static void ath_rate_update(void *priv, struct ieee80211_supported_band *sband, | |
1353 | struct ieee80211_sta *sta, void *priv_sta, | |
4fa00437 | 1354 | u32 changed, enum nl80211_channel_type oper_chan_type) |
9331ec80 S |
1355 | { |
1356 | struct ath_softc *sc = priv; | |
1357 | struct ath_rate_priv *ath_rc_priv = priv_sta; | |
4f0fc7c3 | 1358 | const struct ath_rate_table *rate_table = NULL; |
6473d24d | 1359 | bool oper_cw40 = false, oper_sgi; |
9331ec80 S |
1360 | bool local_cw40 = (ath_rc_priv->ht_cap & WLAN_RC_40_FLAG) ? |
1361 | true : false; | |
6473d24d | 1362 | bool local_sgi = (ath_rc_priv->ht_cap & WLAN_RC_SGI_FLAG) ? |
9331ec80 S |
1363 | true : false; |
1364 | ||
1365 | /* FIXME: Handle AP mode later when we support CWM */ | |
1366 | ||
1367 | if (changed & IEEE80211_RC_HT_CHANGED) { | |
1368 | if (sc->sc_ah->opmode != NL80211_IFTYPE_STATION) | |
1369 | return; | |
1370 | ||
4fa00437 S |
1371 | if (oper_chan_type == NL80211_CHAN_HT40MINUS || |
1372 | oper_chan_type == NL80211_CHAN_HT40PLUS) | |
9331ec80 S |
1373 | oper_cw40 = true; |
1374 | ||
6473d24d VT |
1375 | if (oper_cw40) |
1376 | oper_sgi = (sta->ht_cap.cap & IEEE80211_HT_CAP_SGI_40) ? | |
1377 | true : false; | |
1378 | else if (sc->sc_ah->caps.hw_caps & ATH9K_HW_CAP_SGI_20) | |
1379 | oper_sgi = (sta->ht_cap.cap & IEEE80211_HT_CAP_SGI_20) ? | |
1380 | true : false; | |
1381 | else | |
1382 | oper_sgi = false; | |
9331ec80 | 1383 | |
6473d24d | 1384 | if ((local_cw40 != oper_cw40) || (local_sgi != oper_sgi)) { |
9331ec80 S |
1385 | rate_table = ath_choose_rate_table(sc, sband->band, |
1386 | sta->ht_cap.ht_supported, | |
1387 | oper_cw40); | |
c2da50e5 | 1388 | ath_rc_priv->ht_cap = ath_rc_build_ht_caps(sc, sta, |
6473d24d | 1389 | oper_cw40, oper_sgi); |
9331ec80 S |
1390 | ath_rc_init(sc, priv_sta, sband, sta, rate_table); |
1391 | ||
c46917bb LR |
1392 | ath_print(ath9k_hw_common(sc->sc_ah), ATH_DBG_CONFIG, |
1393 | "Operating HT Bandwidth changed to: %d\n", | |
1394 | sc->hw->conf.channel_type); | |
545750d3 | 1395 | sc->cur_rate_table = hw_rate_table[sc->cur_rate_mode]; |
9331ec80 S |
1396 | } |
1397 | } | |
f078f209 LR |
1398 | } |
1399 | ||
4b7679a5 | 1400 | static void *ath_rate_alloc(struct ieee80211_hw *hw, struct dentry *debugfsdir) |
f078f209 | 1401 | { |
bce048d7 JM |
1402 | struct ath_wiphy *aphy = hw->priv; |
1403 | return aphy->sc; | |
f078f209 LR |
1404 | } |
1405 | ||
1406 | static void ath_rate_free(void *priv) | |
1407 | { | |
1408 | return; | |
1409 | } | |
1410 | ||
4b7679a5 | 1411 | static void *ath_rate_alloc_sta(void *priv, struct ieee80211_sta *sta, gfp_t gfp) |
f078f209 LR |
1412 | { |
1413 | struct ath_softc *sc = priv; | |
46d14a58 | 1414 | struct ath_rate_priv *rate_priv; |
f078f209 | 1415 | |
46d14a58 | 1416 | rate_priv = kzalloc(sizeof(struct ath_rate_priv), gfp); |
f078f209 | 1417 | if (!rate_priv) { |
c46917bb LR |
1418 | ath_print(ath9k_hw_common(sc->sc_ah), ATH_DBG_FATAL, |
1419 | "Unable to allocate private rc structure\n"); | |
f078f209 LR |
1420 | return NULL; |
1421 | } | |
fe60594a | 1422 | |
2660b81a | 1423 | rate_priv->tx_triglevel_max = sc->sc_ah->caps.tx_triglevel_max; |
dc2222a8 | 1424 | |
f078f209 LR |
1425 | return rate_priv; |
1426 | } | |
1427 | ||
4b7679a5 JB |
1428 | static void ath_rate_free_sta(void *priv, struct ieee80211_sta *sta, |
1429 | void *priv_sta) | |
f078f209 | 1430 | { |
46d14a58 | 1431 | struct ath_rate_priv *rate_priv = priv_sta; |
fe60594a | 1432 | kfree(rate_priv); |
f078f209 LR |
1433 | } |
1434 | ||
1435 | static struct rate_control_ops ath_rate_ops = { | |
1436 | .module = NULL, | |
1437 | .name = "ath9k_rate_control", | |
1438 | .tx_status = ath_tx_status, | |
1439 | .get_rate = ath_get_rate, | |
1440 | .rate_init = ath_rate_init, | |
9331ec80 | 1441 | .rate_update = ath_rate_update, |
f078f209 LR |
1442 | .alloc = ath_rate_alloc, |
1443 | .free = ath_rate_free, | |
1444 | .alloc_sta = ath_rate_alloc_sta, | |
4b7679a5 | 1445 | .free_sta = ath_rate_free_sta, |
f078f209 LR |
1446 | }; |
1447 | ||
1448 | int ath_rate_control_register(void) | |
1449 | { | |
1450 | return ieee80211_rate_control_register(&ath_rate_ops); | |
1451 | } | |
1452 | ||
1453 | void ath_rate_control_unregister(void) | |
1454 | { | |
1455 | ieee80211_rate_control_unregister(&ath_rate_ops); | |
1456 | } |