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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 = { |
1d9d06a2 | 23 | 68, |
545750d3 | 24 | 8, /* MCS start */ |
f078f209 | 25 | { |
1d9d06a2 | 26 | [0] = { RC_L_SDT, WLAN_RC_PHY_OFDM, 6000, |
aaa41ec4 | 27 | 5400, 0, 12, 0, 0, 0, 0 }, /* 6 Mb */ |
1d9d06a2 | 28 | [1] = { RC_L_SDT, WLAN_RC_PHY_OFDM, 9000, |
aaa41ec4 | 29 | 7800, 1, 18, 0, 1, 1, 1 }, /* 9 Mb */ |
1d9d06a2 | 30 | [2] = { RC_L_SDT, WLAN_RC_PHY_OFDM, 12000, |
aaa41ec4 | 31 | 10000, 2, 24, 2, 2, 2, 2 }, /* 12 Mb */ |
1d9d06a2 | 32 | [3] = { RC_L_SDT, WLAN_RC_PHY_OFDM, 18000, |
aaa41ec4 | 33 | 13900, 3, 36, 2, 3, 3, 3 }, /* 18 Mb */ |
1d9d06a2 | 34 | [4] = { RC_L_SDT, WLAN_RC_PHY_OFDM, 24000, |
aaa41ec4 | 35 | 17300, 4, 48, 4, 4, 4, 4 }, /* 24 Mb */ |
1d9d06a2 | 36 | [5] = { RC_L_SDT, WLAN_RC_PHY_OFDM, 36000, |
aaa41ec4 | 37 | 23000, 5, 72, 4, 5, 5, 5 }, /* 36 Mb */ |
1d9d06a2 | 38 | [6] = { RC_L_SDT, WLAN_RC_PHY_OFDM, 48000, |
aaa41ec4 | 39 | 27400, 6, 96, 4, 6, 6, 6 }, /* 48 Mb */ |
1d9d06a2 | 40 | [7] = { RC_L_SDT, WLAN_RC_PHY_OFDM, 54000, |
aaa41ec4 | 41 | 29300, 7, 108, 4, 7, 7, 7 }, /* 54 Mb */ |
1d9d06a2 | 42 | [8] = { RC_HT_SDT_2040, WLAN_RC_PHY_HT_20_SS, 6500, |
aaa41ec4 | 43 | 6400, 0, 0, 0, 38, 8, 38 }, /* 6.5 Mb */ |
1d9d06a2 | 44 | [9] = { RC_HT_SDT_20, WLAN_RC_PHY_HT_20_SS, 13000, |
aaa41ec4 | 45 | 12700, 1, 1, 2, 39, 9, 39 }, /* 13 Mb */ |
1d9d06a2 | 46 | [10] = { RC_HT_SDT_20, WLAN_RC_PHY_HT_20_SS, 19500, |
aaa41ec4 | 47 | 18800, 2, 2, 2, 40, 10, 40 }, /* 19.5 Mb */ |
1d9d06a2 | 48 | [11] = { RC_HT_SD_20, WLAN_RC_PHY_HT_20_SS, 26000, |
aaa41ec4 | 49 | 25000, 3, 3, 4, 41, 11, 41 }, /* 26 Mb */ |
1d9d06a2 | 50 | [12] = { RC_HT_SD_20, WLAN_RC_PHY_HT_20_SS, 39000, |
aaa41ec4 | 51 | 36700, 4, 4, 4, 42, 12, 42 }, /* 39 Mb */ |
1d9d06a2 | 52 | [13] = { RC_HT_S_20, WLAN_RC_PHY_HT_20_SS, 52000, |
aaa41ec4 | 53 | 48100, 5, 5, 4, 43, 13, 43 }, /* 52 Mb */ |
1d9d06a2 | 54 | [14] = { RC_HT_S_20, WLAN_RC_PHY_HT_20_SS, 58500, |
aaa41ec4 | 55 | 53500, 6, 6, 4, 44, 14, 44 }, /* 58.5 Mb */ |
1d9d06a2 | 56 | [15] = { RC_HT_S_20, WLAN_RC_PHY_HT_20_SS, 65000, |
aaa41ec4 | 57 | 59000, 7, 7, 4, 45, 16, 46 }, /* 65 Mb */ |
1d9d06a2 | 58 | [16] = { RC_HT_S_20, WLAN_RC_PHY_HT_20_SS_HGI, 72200, |
aaa41ec4 | 59 | 65400, 7, 7, 4, 45, 16, 46 }, /* 75 Mb */ |
1d9d06a2 | 60 | [17] = { RC_INVALID, WLAN_RC_PHY_HT_20_DS, 13000, |
aaa41ec4 | 61 | 12700, 8, 8, 0, 47, 17, 47 }, /* 13 Mb */ |
1d9d06a2 | 62 | [18] = { RC_HT_T_20, WLAN_RC_PHY_HT_20_DS, 26000, |
aaa41ec4 | 63 | 24800, 9, 9, 2, 48, 18, 48 }, /* 26 Mb */ |
1d9d06a2 | 64 | [19] = { RC_HT_T_20, WLAN_RC_PHY_HT_20_DS, 39000, |
aaa41ec4 | 65 | 36600, 10, 10, 2, 49, 19, 49 }, /* 39 Mb */ |
1d9d06a2 | 66 | [20] = { RC_HT_DT_20, WLAN_RC_PHY_HT_20_DS, 52000, |
aaa41ec4 | 67 | 48100, 11, 11, 4, 50, 20, 50 }, /* 52 Mb */ |
1d9d06a2 | 68 | [21] = { RC_HT_DT_20, WLAN_RC_PHY_HT_20_DS, 78000, |
aaa41ec4 | 69 | 69500, 12, 12, 4, 51, 21, 51 }, /* 78 Mb */ |
1d9d06a2 | 70 | [22] = { RC_HT_DT_20, WLAN_RC_PHY_HT_20_DS, 104000, |
aaa41ec4 | 71 | 89500, 13, 13, 4, 52, 22, 52 }, /* 104 Mb */ |
1d9d06a2 | 72 | [23] = { RC_HT_DT_20, WLAN_RC_PHY_HT_20_DS, 117000, |
aaa41ec4 | 73 | 98900, 14, 14, 4, 53, 23, 53 }, /* 117 Mb */ |
1d9d06a2 | 74 | [24] = { RC_HT_DT_20, WLAN_RC_PHY_HT_20_DS, 130000, |
aaa41ec4 | 75 | 108300, 15, 15, 4, 54, 25, 55 }, /* 130 Mb */ |
1d9d06a2 | 76 | [25] = { RC_HT_DT_20, WLAN_RC_PHY_HT_20_DS_HGI, 144400, |
aaa41ec4 | 77 | 120000, 15, 15, 4, 54, 25, 55 }, /* 144.4 Mb */ |
1d9d06a2 | 78 | [26] = { RC_INVALID, WLAN_RC_PHY_HT_20_TS, 19500, |
aaa41ec4 | 79 | 17400, 16, 16, 0, 56, 26, 56 }, /* 19.5 Mb */ |
1d9d06a2 | 80 | [27] = { RC_INVALID, WLAN_RC_PHY_HT_20_TS, 39000, |
aaa41ec4 | 81 | 35100, 17, 17, 2, 57, 27, 57 }, /* 39 Mb */ |
1d9d06a2 | 82 | [28] = { RC_INVALID, WLAN_RC_PHY_HT_20_TS, 58500, |
aaa41ec4 | 83 | 52600, 18, 18, 2, 58, 28, 58 }, /* 58.5 Mb */ |
1d9d06a2 | 84 | [29] = { RC_INVALID, WLAN_RC_PHY_HT_20_TS, 78000, |
aaa41ec4 | 85 | 70400, 19, 19, 4, 59, 29, 59 }, /* 78 Mb */ |
1d9d06a2 | 86 | [30] = { RC_INVALID, WLAN_RC_PHY_HT_20_TS, 117000, |
aaa41ec4 | 87 | 104900, 20, 20, 4, 60, 31, 61 }, /* 117 Mb */ |
1d9d06a2 | 88 | [31] = { RC_INVALID, WLAN_RC_PHY_HT_20_TS_HGI, 130000, |
aaa41ec4 | 89 | 115800, 20, 20, 4, 60, 31, 61 }, /* 130 Mb*/ |
1d9d06a2 | 90 | [32] = { RC_HT_T_20, WLAN_RC_PHY_HT_20_TS, 156000, |
aaa41ec4 | 91 | 137200, 21, 21, 4, 62, 33, 63 }, /* 156 Mb */ |
1d9d06a2 | 92 | [33] = { RC_HT_T_20, WLAN_RC_PHY_HT_20_TS_HGI, 173300, |
aaa41ec4 | 93 | 151100, 21, 21, 4, 62, 33, 63 }, /* 173.3 Mb */ |
1d9d06a2 | 94 | [34] = { RC_HT_T_20, WLAN_RC_PHY_HT_20_TS, 175500, |
aaa41ec4 | 95 | 152800, 22, 22, 4, 64, 35, 65 }, /* 175.5 Mb */ |
1d9d06a2 | 96 | [35] = { RC_HT_T_20, WLAN_RC_PHY_HT_20_TS_HGI, 195000, |
aaa41ec4 | 97 | 168400, 22, 22, 4, 64, 35, 65 }, /* 195 Mb*/ |
1d9d06a2 | 98 | [36] = { RC_HT_T_20, WLAN_RC_PHY_HT_20_TS, 195000, |
aaa41ec4 | 99 | 168400, 23, 23, 4, 66, 37, 67 }, /* 195 Mb */ |
1d9d06a2 | 100 | [37] = { RC_HT_T_20, WLAN_RC_PHY_HT_20_TS_HGI, 216700, |
aaa41ec4 | 101 | 185000, 23, 23, 4, 66, 37, 67 }, /* 216.7 Mb */ |
1d9d06a2 | 102 | [38] = { RC_HT_SDT_40, WLAN_RC_PHY_HT_40_SS, 13500, |
aaa41ec4 | 103 | 13200, 0, 0, 0, 38, 38, 38 }, /* 13.5 Mb*/ |
1d9d06a2 | 104 | [39] = { RC_HT_SDT_40, WLAN_RC_PHY_HT_40_SS, 27500, |
aaa41ec4 | 105 | 25900, 1, 1, 2, 39, 39, 39 }, /* 27.0 Mb*/ |
1d9d06a2 | 106 | [40] = { RC_HT_SDT_40, WLAN_RC_PHY_HT_40_SS, 40500, |
aaa41ec4 | 107 | 38600, 2, 2, 2, 40, 40, 40 }, /* 40.5 Mb*/ |
1d9d06a2 | 108 | [41] = { RC_HT_SD_40, WLAN_RC_PHY_HT_40_SS, 54000, |
aaa41ec4 | 109 | 49800, 3, 3, 4, 41, 41, 41 }, /* 54 Mb */ |
1d9d06a2 | 110 | [42] = { RC_HT_SD_40, WLAN_RC_PHY_HT_40_SS, 81500, |
aaa41ec4 | 111 | 72200, 4, 4, 4, 42, 42, 42 }, /* 81 Mb */ |
1d9d06a2 | 112 | [43] = { RC_HT_S_40, WLAN_RC_PHY_HT_40_SS, 108000, |
aaa41ec4 | 113 | 92900, 5, 5, 4, 43, 43, 43 }, /* 108 Mb */ |
1d9d06a2 | 114 | [44] = { RC_HT_S_40, WLAN_RC_PHY_HT_40_SS, 121500, |
aaa41ec4 | 115 | 102700, 6, 6, 4, 44, 44, 44 }, /* 121.5 Mb*/ |
1d9d06a2 | 116 | [45] = { RC_HT_S_40, WLAN_RC_PHY_HT_40_SS, 135000, |
aaa41ec4 | 117 | 112000, 7, 7, 4, 45, 46, 46 }, /* 135 Mb */ |
1d9d06a2 | 118 | [46] = { RC_HT_S_40, WLAN_RC_PHY_HT_40_SS_HGI, 150000, |
aaa41ec4 | 119 | 122000, 7, 7, 4, 45, 46, 46 }, /* 150 Mb */ |
1d9d06a2 | 120 | [47] = { RC_INVALID, WLAN_RC_PHY_HT_40_DS, 27000, |
aaa41ec4 | 121 | 25800, 8, 8, 0, 47, 47, 47 }, /* 27 Mb */ |
1d9d06a2 | 122 | [48] = { RC_HT_T_40, WLAN_RC_PHY_HT_40_DS, 54000, |
aaa41ec4 | 123 | 49800, 9, 9, 2, 48, 48, 48 }, /* 54 Mb */ |
1d9d06a2 | 124 | [49] = { RC_HT_T_40, WLAN_RC_PHY_HT_40_DS, 81000, |
aaa41ec4 | 125 | 71900, 10, 10, 2, 49, 49, 49 }, /* 81 Mb */ |
1d9d06a2 | 126 | [50] = { RC_HT_DT_40, WLAN_RC_PHY_HT_40_DS, 108000, |
aaa41ec4 | 127 | 92500, 11, 11, 4, 50, 50, 50 }, /* 108 Mb */ |
1d9d06a2 | 128 | [51] = { RC_HT_DT_40, WLAN_RC_PHY_HT_40_DS, 162000, |
aaa41ec4 | 129 | 130300, 12, 12, 4, 51, 51, 51 }, /* 162 Mb */ |
1d9d06a2 | 130 | [52] = { RC_HT_DT_40, WLAN_RC_PHY_HT_40_DS, 216000, |
aaa41ec4 | 131 | 162800, 13, 13, 4, 52, 52, 52 }, /* 216 Mb */ |
1d9d06a2 | 132 | [53] = { RC_HT_DT_40, WLAN_RC_PHY_HT_40_DS, 243000, |
aaa41ec4 | 133 | 178200, 14, 14, 4, 53, 53, 53 }, /* 243 Mb */ |
1d9d06a2 | 134 | [54] = { RC_HT_DT_40, WLAN_RC_PHY_HT_40_DS, 270000, |
aaa41ec4 | 135 | 192100, 15, 15, 4, 54, 55, 55 }, /* 270 Mb */ |
1d9d06a2 | 136 | [55] = { RC_HT_DT_40, WLAN_RC_PHY_HT_40_DS_HGI, 300000, |
aaa41ec4 | 137 | 207000, 15, 15, 4, 54, 55, 55 }, /* 300 Mb */ |
1d9d06a2 | 138 | [56] = { RC_INVALID, WLAN_RC_PHY_HT_40_TS, 40500, |
aaa41ec4 | 139 | 36100, 16, 16, 0, 56, 56, 56 }, /* 40.5 Mb */ |
1d9d06a2 | 140 | [57] = { RC_INVALID, WLAN_RC_PHY_HT_40_TS, 81000, |
aaa41ec4 | 141 | 72900, 17, 17, 2, 57, 57, 57 }, /* 81 Mb */ |
1d9d06a2 | 142 | [58] = { RC_INVALID, WLAN_RC_PHY_HT_40_TS, 121500, |
aaa41ec4 | 143 | 108300, 18, 18, 2, 58, 58, 58 }, /* 121.5 Mb */ |
1d9d06a2 | 144 | [59] = { RC_INVALID, WLAN_RC_PHY_HT_40_TS, 162000, |
aaa41ec4 | 145 | 142000, 19, 19, 4, 59, 59, 59 }, /* 162 Mb */ |
1d9d06a2 | 146 | [60] = { RC_INVALID, WLAN_RC_PHY_HT_40_TS, 243000, |
aaa41ec4 | 147 | 205100, 20, 20, 4, 60, 61, 61 }, /* 243 Mb */ |
1d9d06a2 | 148 | [61] = { RC_INVALID, WLAN_RC_PHY_HT_40_TS_HGI, 270000, |
aaa41ec4 | 149 | 224700, 20, 20, 4, 60, 61, 61 }, /* 270 Mb */ |
1d9d06a2 | 150 | [62] = { RC_HT_T_40, WLAN_RC_PHY_HT_40_TS, 324000, |
aaa41ec4 | 151 | 263100, 21, 21, 4, 62, 63, 63 }, /* 324 Mb */ |
1d9d06a2 | 152 | [63] = { RC_HT_T_40, WLAN_RC_PHY_HT_40_TS_HGI, 360000, |
aaa41ec4 | 153 | 288000, 21, 21, 4, 62, 63, 63 }, /* 360 Mb */ |
1d9d06a2 | 154 | [64] = { RC_HT_T_40, WLAN_RC_PHY_HT_40_TS, 364500, |
aaa41ec4 | 155 | 290700, 22, 22, 4, 64, 65, 65 }, /* 364.5 Mb */ |
1d9d06a2 | 156 | [65] = { RC_HT_T_40, WLAN_RC_PHY_HT_40_TS_HGI, 405000, |
aaa41ec4 | 157 | 317200, 22, 22, 4, 64, 65, 65 }, /* 405 Mb */ |
1d9d06a2 | 158 | [66] = { RC_HT_T_40, WLAN_RC_PHY_HT_40_TS, 405000, |
aaa41ec4 | 159 | 317200, 23, 23, 4, 66, 67, 67 }, /* 405 Mb */ |
1d9d06a2 | 160 | [67] = { RC_HT_T_40, WLAN_RC_PHY_HT_40_TS_HGI, 450000, |
aaa41ec4 | 161 | 346400, 23, 23, 4, 66, 67, 67 }, /* 450 Mb */ |
f078f209 LR |
162 | }, |
163 | 50, /* probe interval */ | |
f078f209 LR |
164 | WLAN_RC_HT_FLAG, /* Phy rates allowed initially */ |
165 | }; | |
166 | ||
f078f209 LR |
167 | /* 4ms frame limit not used for NG mode. The values filled |
168 | * for HT are the 64K max aggregate limit */ | |
169 | ||
4f0fc7c3 | 170 | static const struct ath_rate_table ar5416_11ng_ratetable = { |
1d9d06a2 | 171 | 72, |
545750d3 | 172 | 12, /* MCS start */ |
f078f209 | 173 | { |
1d9d06a2 | 174 | [0] = { RC_ALL, WLAN_RC_PHY_CCK, 1000, |
aaa41ec4 | 175 | 900, 0, 2, 0, 0, 0, 0 }, /* 1 Mb */ |
1d9d06a2 | 176 | [1] = { RC_ALL, WLAN_RC_PHY_CCK, 2000, |
aaa41ec4 | 177 | 1900, 1, 4, 1, 1, 1, 1 }, /* 2 Mb */ |
1d9d06a2 | 178 | [2] = { RC_ALL, WLAN_RC_PHY_CCK, 5500, |
aaa41ec4 | 179 | 4900, 2, 11, 2, 2, 2, 2 }, /* 5.5 Mb */ |
1d9d06a2 | 180 | [3] = { RC_ALL, WLAN_RC_PHY_CCK, 11000, |
aaa41ec4 | 181 | 8100, 3, 22, 3, 3, 3, 3 }, /* 11 Mb */ |
1d9d06a2 | 182 | [4] = { RC_INVALID, WLAN_RC_PHY_OFDM, 6000, |
aaa41ec4 | 183 | 5400, 4, 12, 4, 4, 4, 4 }, /* 6 Mb */ |
1d9d06a2 | 184 | [5] = { RC_INVALID, WLAN_RC_PHY_OFDM, 9000, |
aaa41ec4 | 185 | 7800, 5, 18, 4, 5, 5, 5 }, /* 9 Mb */ |
1d9d06a2 | 186 | [6] = { RC_L_SDT, WLAN_RC_PHY_OFDM, 12000, |
aaa41ec4 | 187 | 10100, 6, 24, 6, 6, 6, 6 }, /* 12 Mb */ |
1d9d06a2 | 188 | [7] = { RC_L_SDT, WLAN_RC_PHY_OFDM, 18000, |
aaa41ec4 | 189 | 14100, 7, 36, 6, 7, 7, 7 }, /* 18 Mb */ |
1d9d06a2 | 190 | [8] = { RC_L_SDT, WLAN_RC_PHY_OFDM, 24000, |
aaa41ec4 | 191 | 17700, 8, 48, 8, 8, 8, 8 }, /* 24 Mb */ |
1d9d06a2 | 192 | [9] = { RC_L_SDT, WLAN_RC_PHY_OFDM, 36000, |
aaa41ec4 | 193 | 23700, 9, 72, 8, 9, 9, 9 }, /* 36 Mb */ |
1d9d06a2 | 194 | [10] = { RC_L_SDT, WLAN_RC_PHY_OFDM, 48000, |
aaa41ec4 | 195 | 27400, 10, 96, 8, 10, 10, 10 }, /* 48 Mb */ |
1d9d06a2 | 196 | [11] = { RC_L_SDT, WLAN_RC_PHY_OFDM, 54000, |
aaa41ec4 | 197 | 30900, 11, 108, 8, 11, 11, 11 }, /* 54 Mb */ |
1d9d06a2 | 198 | [12] = { RC_INVALID, WLAN_RC_PHY_HT_20_SS, 6500, |
aaa41ec4 | 199 | 6400, 0, 0, 4, 42, 12, 42 }, /* 6.5 Mb */ |
1d9d06a2 | 200 | [13] = { RC_HT_SDT_20, WLAN_RC_PHY_HT_20_SS, 13000, |
aaa41ec4 | 201 | 12700, 1, 1, 6, 43, 13, 43 }, /* 13 Mb */ |
1d9d06a2 | 202 | [14] = { RC_HT_SDT_20, WLAN_RC_PHY_HT_20_SS, 19500, |
aaa41ec4 | 203 | 18800, 2, 2, 6, 44, 14, 44 }, /* 19.5 Mb*/ |
1d9d06a2 | 204 | [15] = { RC_HT_SD_20, WLAN_RC_PHY_HT_20_SS, 26000, |
aaa41ec4 | 205 | 25000, 3, 3, 8, 45, 15, 45 }, /* 26 Mb */ |
1d9d06a2 | 206 | [16] = { RC_HT_SD_20, WLAN_RC_PHY_HT_20_SS, 39000, |
aaa41ec4 | 207 | 36700, 4, 4, 8, 46, 16, 46 }, /* 39 Mb */ |
1d9d06a2 | 208 | [17] = { RC_HT_S_20, WLAN_RC_PHY_HT_20_SS, 52000, |
aaa41ec4 | 209 | 48100, 5, 5, 8, 47, 17, 47 }, /* 52 Mb */ |
1d9d06a2 | 210 | [18] = { RC_HT_S_20, WLAN_RC_PHY_HT_20_SS, 58500, |
aaa41ec4 | 211 | 53500, 6, 6, 8, 48, 18, 48 }, /* 58.5 Mb */ |
1d9d06a2 | 212 | [19] = { RC_HT_S_20, WLAN_RC_PHY_HT_20_SS, 65000, |
aaa41ec4 | 213 | 59000, 7, 7, 8, 49, 20, 50 }, /* 65 Mb */ |
1d9d06a2 | 214 | [20] = { RC_HT_S_20, WLAN_RC_PHY_HT_20_SS_HGI, 72200, |
aaa41ec4 | 215 | 65400, 7, 7, 8, 49, 20, 50 }, /* 65 Mb*/ |
1d9d06a2 | 216 | [21] = { RC_INVALID, WLAN_RC_PHY_HT_20_DS, 13000, |
aaa41ec4 | 217 | 12700, 8, 8, 4, 51, 21, 51 }, /* 13 Mb */ |
1d9d06a2 | 218 | [22] = { RC_HT_T_20, WLAN_RC_PHY_HT_20_DS, 26000, |
aaa41ec4 | 219 | 24800, 9, 9, 6, 52, 22, 52 }, /* 26 Mb */ |
1d9d06a2 | 220 | [23] = { RC_HT_T_20, WLAN_RC_PHY_HT_20_DS, 39000, |
aaa41ec4 | 221 | 36600, 10, 10, 6, 53, 23, 53 }, /* 39 Mb */ |
1d9d06a2 | 222 | [24] = { RC_HT_DT_20, WLAN_RC_PHY_HT_20_DS, 52000, |
aaa41ec4 | 223 | 48100, 11, 11, 8, 54, 24, 54 }, /* 52 Mb */ |
1d9d06a2 | 224 | [25] = { RC_HT_DT_20, WLAN_RC_PHY_HT_20_DS, 78000, |
aaa41ec4 | 225 | 69500, 12, 12, 8, 55, 25, 55 }, /* 78 Mb */ |
1d9d06a2 | 226 | [26] = { RC_HT_DT_20, WLAN_RC_PHY_HT_20_DS, 104000, |
aaa41ec4 | 227 | 89500, 13, 13, 8, 56, 26, 56 }, /* 104 Mb */ |
1d9d06a2 | 228 | [27] = { RC_HT_DT_20, WLAN_RC_PHY_HT_20_DS, 117000, |
aaa41ec4 | 229 | 98900, 14, 14, 8, 57, 27, 57 }, /* 117 Mb */ |
1d9d06a2 | 230 | [28] = { RC_HT_DT_20, WLAN_RC_PHY_HT_20_DS, 130000, |
aaa41ec4 | 231 | 108300, 15, 15, 8, 58, 29, 59 }, /* 130 Mb */ |
1d9d06a2 | 232 | [29] = { RC_HT_DT_20, WLAN_RC_PHY_HT_20_DS_HGI, 144400, |
aaa41ec4 | 233 | 120000, 15, 15, 8, 58, 29, 59 }, /* 144.4 Mb */ |
1d9d06a2 | 234 | [30] = { RC_INVALID, WLAN_RC_PHY_HT_20_TS, 19500, |
aaa41ec4 | 235 | 17400, 16, 16, 4, 60, 30, 60 }, /* 19.5 Mb */ |
1d9d06a2 | 236 | [31] = { RC_INVALID, WLAN_RC_PHY_HT_20_TS, 39000, |
aaa41ec4 | 237 | 35100, 17, 17, 6, 61, 31, 61 }, /* 39 Mb */ |
1d9d06a2 | 238 | [32] = { RC_INVALID, WLAN_RC_PHY_HT_20_TS, 58500, |
aaa41ec4 | 239 | 52600, 18, 18, 6, 62, 32, 62 }, /* 58.5 Mb */ |
1d9d06a2 | 240 | [33] = { RC_INVALID, WLAN_RC_PHY_HT_20_TS, 78000, |
aaa41ec4 | 241 | 70400, 19, 19, 8, 63, 33, 63 }, /* 78 Mb */ |
1d9d06a2 | 242 | [34] = { RC_INVALID, WLAN_RC_PHY_HT_20_TS, 117000, |
aaa41ec4 | 243 | 104900, 20, 20, 8, 64, 35, 65 }, /* 117 Mb */ |
1d9d06a2 | 244 | [35] = { RC_INVALID, WLAN_RC_PHY_HT_20_TS_HGI, 130000, |
aaa41ec4 | 245 | 115800, 20, 20, 8, 64, 35, 65 }, /* 130 Mb */ |
1d9d06a2 | 246 | [36] = { RC_HT_T_20, WLAN_RC_PHY_HT_20_TS, 156000, |
aaa41ec4 | 247 | 137200, 21, 21, 8, 66, 37, 67 }, /* 156 Mb */ |
1d9d06a2 | 248 | [37] = { RC_HT_T_20, WLAN_RC_PHY_HT_20_TS_HGI, 173300, |
aaa41ec4 | 249 | 151100, 21, 21, 8, 66, 37, 67 }, /* 173.3 Mb */ |
1d9d06a2 | 250 | [38] = { RC_HT_T_20, WLAN_RC_PHY_HT_20_TS, 175500, |
aaa41ec4 | 251 | 152800, 22, 22, 8, 68, 39, 69 }, /* 175.5 Mb */ |
1d9d06a2 | 252 | [39] = { RC_HT_T_20, WLAN_RC_PHY_HT_20_TS_HGI, 195000, |
aaa41ec4 | 253 | 168400, 22, 22, 8, 68, 39, 69 }, /* 195 Mb */ |
1d9d06a2 | 254 | [40] = { RC_HT_T_20, WLAN_RC_PHY_HT_20_TS, 195000, |
aaa41ec4 | 255 | 168400, 23, 23, 8, 70, 41, 71 }, /* 195 Mb */ |
1d9d06a2 | 256 | [41] = { RC_HT_T_20, WLAN_RC_PHY_HT_20_TS_HGI, 216700, |
aaa41ec4 | 257 | 185000, 23, 23, 8, 70, 41, 71 }, /* 216.7 Mb */ |
1d9d06a2 | 258 | [42] = { RC_HT_SDT_40, WLAN_RC_PHY_HT_40_SS, 13500, |
aaa41ec4 | 259 | 13200, 0, 0, 8, 42, 42, 42 }, /* 13.5 Mb */ |
1d9d06a2 | 260 | [43] = { RC_HT_SDT_40, WLAN_RC_PHY_HT_40_SS, 27500, |
aaa41ec4 | 261 | 25900, 1, 1, 8, 43, 43, 43 }, /* 27.0 Mb */ |
1d9d06a2 | 262 | [44] = { RC_HT_SDT_40, WLAN_RC_PHY_HT_40_SS, 40500, |
aaa41ec4 | 263 | 38600, 2, 2, 8, 44, 44, 44 }, /* 40.5 Mb */ |
1d9d06a2 | 264 | [45] = { RC_HT_SD_40, WLAN_RC_PHY_HT_40_SS, 54000, |
aaa41ec4 | 265 | 49800, 3, 3, 8, 45, 45, 45 }, /* 54 Mb */ |
1d9d06a2 | 266 | [46] = { RC_HT_SD_40, WLAN_RC_PHY_HT_40_SS, 81500, |
aaa41ec4 | 267 | 72200, 4, 4, 8, 46, 46, 46 }, /* 81 Mb */ |
1d9d06a2 | 268 | [47] = { RC_HT_S_40 , WLAN_RC_PHY_HT_40_SS, 108000, |
aaa41ec4 | 269 | 92900, 5, 5, 8, 47, 47, 47 }, /* 108 Mb */ |
1d9d06a2 | 270 | [48] = { RC_HT_S_40, WLAN_RC_PHY_HT_40_SS, 121500, |
aaa41ec4 | 271 | 102700, 6, 6, 8, 48, 48, 48 }, /* 121.5 Mb */ |
1d9d06a2 | 272 | [49] = { RC_HT_S_40, WLAN_RC_PHY_HT_40_SS, 135000, |
aaa41ec4 | 273 | 112000, 7, 7, 8, 49, 50, 50 }, /* 135 Mb */ |
1d9d06a2 | 274 | [50] = { RC_HT_S_40, WLAN_RC_PHY_HT_40_SS_HGI, 150000, |
aaa41ec4 | 275 | 122000, 7, 7, 8, 49, 50, 50 }, /* 150 Mb */ |
1d9d06a2 | 276 | [51] = { RC_INVALID, WLAN_RC_PHY_HT_40_DS, 27000, |
aaa41ec4 | 277 | 25800, 8, 8, 8, 51, 51, 51 }, /* 27 Mb */ |
1d9d06a2 | 278 | [52] = { RC_HT_T_40, WLAN_RC_PHY_HT_40_DS, 54000, |
aaa41ec4 | 279 | 49800, 9, 9, 8, 52, 52, 52 }, /* 54 Mb */ |
1d9d06a2 | 280 | [53] = { RC_HT_T_40, WLAN_RC_PHY_HT_40_DS, 81000, |
aaa41ec4 | 281 | 71900, 10, 10, 8, 53, 53, 53 }, /* 81 Mb */ |
1d9d06a2 | 282 | [54] = { RC_HT_DT_40, WLAN_RC_PHY_HT_40_DS, 108000, |
aaa41ec4 | 283 | 92500, 11, 11, 8, 54, 54, 54 }, /* 108 Mb */ |
1d9d06a2 | 284 | [55] = { RC_HT_DT_40, WLAN_RC_PHY_HT_40_DS, 162000, |
aaa41ec4 | 285 | 130300, 12, 12, 8, 55, 55, 55 }, /* 162 Mb */ |
1d9d06a2 | 286 | [56] = { RC_HT_DT_40, WLAN_RC_PHY_HT_40_DS, 216000, |
aaa41ec4 | 287 | 162800, 13, 13, 8, 56, 56, 56 }, /* 216 Mb */ |
1d9d06a2 | 288 | [57] = { RC_HT_DT_40, WLAN_RC_PHY_HT_40_DS, 243000, |
aaa41ec4 | 289 | 178200, 14, 14, 8, 57, 57, 57 }, /* 243 Mb */ |
1d9d06a2 | 290 | [58] = { RC_HT_DT_40, WLAN_RC_PHY_HT_40_DS, 270000, |
aaa41ec4 | 291 | 192100, 15, 15, 8, 58, 59, 59 }, /* 270 Mb */ |
1d9d06a2 | 292 | [59] = { RC_HT_DT_40, WLAN_RC_PHY_HT_40_DS_HGI, 300000, |
aaa41ec4 | 293 | 207000, 15, 15, 8, 58, 59, 59 }, /* 300 Mb */ |
1d9d06a2 | 294 | [60] = { RC_INVALID, WLAN_RC_PHY_HT_40_TS, 40500, |
aaa41ec4 | 295 | 36100, 16, 16, 8, 60, 60, 60 }, /* 40.5 Mb */ |
1d9d06a2 | 296 | [61] = { RC_INVALID, WLAN_RC_PHY_HT_40_TS, 81000, |
aaa41ec4 | 297 | 72900, 17, 17, 8, 61, 61, 61 }, /* 81 Mb */ |
1d9d06a2 | 298 | [62] = { RC_INVALID, WLAN_RC_PHY_HT_40_TS, 121500, |
aaa41ec4 | 299 | 108300, 18, 18, 8, 62, 62, 62 }, /* 121.5 Mb */ |
1d9d06a2 | 300 | [63] = { RC_INVALID, WLAN_RC_PHY_HT_40_TS, 162000, |
aaa41ec4 | 301 | 142000, 19, 19, 8, 63, 63, 63 }, /* 162 Mb */ |
1d9d06a2 | 302 | [64] = { RC_INVALID, WLAN_RC_PHY_HT_40_TS, 243000, |
aaa41ec4 | 303 | 205100, 20, 20, 8, 64, 65, 65 }, /* 243 Mb */ |
1d9d06a2 | 304 | [65] = { RC_INVALID, WLAN_RC_PHY_HT_40_TS_HGI, 270000, |
7a826652 | 305 | 224700, 20, 20, 8, 64, 65, 65 }, /* 270 Mb */ |
1d9d06a2 | 306 | [66] = { RC_HT_T_40, WLAN_RC_PHY_HT_40_TS, 324000, |
aaa41ec4 | 307 | 263100, 21, 21, 8, 66, 67, 67 }, /* 324 Mb */ |
1d9d06a2 | 308 | [67] = { RC_HT_T_40, WLAN_RC_PHY_HT_40_TS_HGI, 360000, |
aaa41ec4 | 309 | 288000, 21, 21, 8, 66, 67, 67 }, /* 360 Mb */ |
1d9d06a2 | 310 | [68] = { RC_HT_T_40, WLAN_RC_PHY_HT_40_TS, 364500, |
aaa41ec4 | 311 | 290700, 22, 22, 8, 68, 69, 69 }, /* 364.5 Mb */ |
1d9d06a2 | 312 | [69] = { RC_HT_T_40, WLAN_RC_PHY_HT_40_TS_HGI, 405000, |
aaa41ec4 | 313 | 317200, 22, 22, 8, 68, 69, 69 }, /* 405 Mb */ |
1d9d06a2 | 314 | [70] = { RC_HT_T_40, WLAN_RC_PHY_HT_40_TS, 405000, |
aaa41ec4 | 315 | 317200, 23, 23, 8, 70, 71, 71 }, /* 405 Mb */ |
1d9d06a2 | 316 | [71] = { RC_HT_T_40, WLAN_RC_PHY_HT_40_TS_HGI, 450000, |
aaa41ec4 | 317 | 346400, 23, 23, 8, 70, 71, 71 }, /* 450 Mb */ |
1fe8234a | 318 | }, |
f078f209 | 319 | 50, /* probe interval */ |
f078f209 LR |
320 | WLAN_RC_HT_FLAG, /* Phy rates allowed initially */ |
321 | }; | |
322 | ||
4f0fc7c3 | 323 | static const struct ath_rate_table ar5416_11a_ratetable = { |
f078f209 | 324 | 8, |
545750d3 | 325 | 0, |
f078f209 | 326 | { |
1d9d06a2 | 327 | { RC_L_SDT, WLAN_RC_PHY_OFDM, 6000, /* 6 Mb */ |
aaa41ec4 | 328 | 5400, 0, 12, 0}, |
1d9d06a2 | 329 | { RC_L_SDT, WLAN_RC_PHY_OFDM, 9000, /* 9 Mb */ |
aaa41ec4 | 330 | 7800, 1, 18, 0}, |
1d9d06a2 | 331 | { RC_L_SDT, WLAN_RC_PHY_OFDM, 12000, /* 12 Mb */ |
aaa41ec4 | 332 | 10000, 2, 24, 2}, |
1d9d06a2 | 333 | { RC_L_SDT, WLAN_RC_PHY_OFDM, 18000, /* 18 Mb */ |
aaa41ec4 | 334 | 13900, 3, 36, 2}, |
1d9d06a2 | 335 | { RC_L_SDT, WLAN_RC_PHY_OFDM, 24000, /* 24 Mb */ |
aaa41ec4 | 336 | 17300, 4, 48, 4}, |
1d9d06a2 | 337 | { RC_L_SDT, WLAN_RC_PHY_OFDM, 36000, /* 36 Mb */ |
aaa41ec4 | 338 | 23000, 5, 72, 4}, |
1d9d06a2 | 339 | { RC_L_SDT, WLAN_RC_PHY_OFDM, 48000, /* 48 Mb */ |
aaa41ec4 | 340 | 27400, 6, 96, 4}, |
1d9d06a2 | 341 | { RC_L_SDT, WLAN_RC_PHY_OFDM, 54000, /* 54 Mb */ |
aaa41ec4 | 342 | 29300, 7, 108, 4}, |
f078f209 LR |
343 | }, |
344 | 50, /* probe interval */ | |
f078f209 LR |
345 | 0, /* Phy rates allowed initially */ |
346 | }; | |
347 | ||
4f0fc7c3 | 348 | static const struct ath_rate_table ar5416_11g_ratetable = { |
f078f209 | 349 | 12, |
545750d3 | 350 | 0, |
f078f209 | 351 | { |
1d9d06a2 | 352 | { RC_L_SDT, WLAN_RC_PHY_CCK, 1000, /* 1 Mb */ |
aaa41ec4 | 353 | 900, 0, 2, 0}, |
1d9d06a2 | 354 | { RC_L_SDT, WLAN_RC_PHY_CCK, 2000, /* 2 Mb */ |
aaa41ec4 | 355 | 1900, 1, 4, 1}, |
1d9d06a2 | 356 | { RC_L_SDT, WLAN_RC_PHY_CCK, 5500, /* 5.5 Mb */ |
aaa41ec4 | 357 | 4900, 2, 11, 2}, |
1d9d06a2 | 358 | { RC_L_SDT, WLAN_RC_PHY_CCK, 11000, /* 11 Mb */ |
aaa41ec4 | 359 | 8100, 3, 22, 3}, |
f63b340d | 360 | { RC_INVALID, WLAN_RC_PHY_OFDM, 6000, /* 6 Mb */ |
aaa41ec4 | 361 | 5400, 4, 12, 4}, |
f63b340d | 362 | { RC_INVALID, WLAN_RC_PHY_OFDM, 9000, /* 9 Mb */ |
aaa41ec4 | 363 | 7800, 5, 18, 4}, |
1d9d06a2 | 364 | { RC_L_SDT, WLAN_RC_PHY_OFDM, 12000, /* 12 Mb */ |
aaa41ec4 | 365 | 10000, 6, 24, 6}, |
1d9d06a2 | 366 | { RC_L_SDT, WLAN_RC_PHY_OFDM, 18000, /* 18 Mb */ |
aaa41ec4 | 367 | 13900, 7, 36, 6}, |
1d9d06a2 | 368 | { RC_L_SDT, WLAN_RC_PHY_OFDM, 24000, /* 24 Mb */ |
aaa41ec4 | 369 | 17300, 8, 48, 8}, |
1d9d06a2 | 370 | { RC_L_SDT, WLAN_RC_PHY_OFDM, 36000, /* 36 Mb */ |
aaa41ec4 | 371 | 23000, 9, 72, 8}, |
1d9d06a2 | 372 | { RC_L_SDT, WLAN_RC_PHY_OFDM, 48000, /* 48 Mb */ |
aaa41ec4 | 373 | 27400, 10, 96, 8}, |
1d9d06a2 | 374 | { RC_L_SDT, WLAN_RC_PHY_OFDM, 54000, /* 54 Mb */ |
aaa41ec4 | 375 | 29300, 11, 108, 8}, |
f078f209 LR |
376 | }, |
377 | 50, /* probe interval */ | |
f078f209 LR |
378 | 0, /* Phy rates allowed initially */ |
379 | }; | |
380 | ||
545750d3 FF |
381 | static const struct ath_rate_table *hw_rate_table[ATH9K_MODE_MAX] = { |
382 | [ATH9K_MODE_11A] = &ar5416_11a_ratetable, | |
383 | [ATH9K_MODE_11G] = &ar5416_11g_ratetable, | |
384 | [ATH9K_MODE_11NA_HT20] = &ar5416_11na_ratetable, | |
385 | [ATH9K_MODE_11NG_HT20] = &ar5416_11ng_ratetable, | |
386 | [ATH9K_MODE_11NA_HT40PLUS] = &ar5416_11na_ratetable, | |
387 | [ATH9K_MODE_11NA_HT40MINUS] = &ar5416_11na_ratetable, | |
388 | [ATH9K_MODE_11NG_HT40PLUS] = &ar5416_11ng_ratetable, | |
389 | [ATH9K_MODE_11NG_HT40MINUS] = &ar5416_11ng_ratetable, | |
390 | }; | |
391 | ||
392 | static int ath_rc_get_rateindex(const struct ath_rate_table *rate_table, | |
393 | struct ieee80211_tx_rate *rate); | |
394 | ||
f078f209 LR |
395 | static inline int8_t median(int8_t a, int8_t b, int8_t c) |
396 | { | |
397 | if (a >= b) { | |
398 | if (b >= c) | |
399 | return b; | |
400 | else if (a > c) | |
401 | return c; | |
402 | else | |
403 | return a; | |
404 | } else { | |
405 | if (a >= c) | |
406 | return a; | |
407 | else if (b >= c) | |
408 | return c; | |
409 | else | |
410 | return b; | |
411 | } | |
412 | } | |
413 | ||
4f0fc7c3 | 414 | static void ath_rc_sort_validrates(const struct ath_rate_table *rate_table, |
46d14a58 | 415 | struct ath_rate_priv *ath_rc_priv) |
f078f209 LR |
416 | { |
417 | u8 i, j, idx, idx_next; | |
418 | ||
256b7759 | 419 | for (i = ath_rc_priv->max_valid_rate - 1; i > 0; i--) { |
f078f209 | 420 | for (j = 0; j <= i-1; j++) { |
256b7759 S |
421 | idx = ath_rc_priv->valid_rate_index[j]; |
422 | idx_next = ath_rc_priv->valid_rate_index[j+1]; | |
f078f209 LR |
423 | |
424 | if (rate_table->info[idx].ratekbps > | |
425 | rate_table->info[idx_next].ratekbps) { | |
256b7759 S |
426 | ath_rc_priv->valid_rate_index[j] = idx_next; |
427 | ath_rc_priv->valid_rate_index[j+1] = idx; | |
f078f209 LR |
428 | } |
429 | } | |
430 | } | |
431 | } | |
432 | ||
46d14a58 | 433 | static void ath_rc_init_valid_txmask(struct ath_rate_priv *ath_rc_priv) |
f078f209 LR |
434 | { |
435 | u8 i; | |
436 | ||
256b7759 | 437 | for (i = 0; i < ath_rc_priv->rate_table_size; i++) |
46d14a58 | 438 | ath_rc_priv->valid_rate_index[i] = 0; |
f078f209 LR |
439 | } |
440 | ||
46d14a58 | 441 | static inline void ath_rc_set_valid_txmask(struct ath_rate_priv *ath_rc_priv, |
f078f209 LR |
442 | u8 index, int valid_tx_rate) |
443 | { | |
9680e8a3 | 444 | BUG_ON(index > ath_rc_priv->rate_table_size); |
f63b340d | 445 | ath_rc_priv->valid_rate_index[index] = !!valid_tx_rate; |
f078f209 LR |
446 | } |
447 | ||
4f0fc7c3 LR |
448 | static inline |
449 | int ath_rc_get_nextvalid_txrate(const struct ath_rate_table *rate_table, | |
450 | struct ath_rate_priv *ath_rc_priv, | |
451 | u8 cur_valid_txrate, | |
452 | u8 *next_idx) | |
f078f209 LR |
453 | { |
454 | u8 i; | |
455 | ||
256b7759 S |
456 | for (i = 0; i < ath_rc_priv->max_valid_rate - 1; i++) { |
457 | if (ath_rc_priv->valid_rate_index[i] == cur_valid_txrate) { | |
458 | *next_idx = ath_rc_priv->valid_rate_index[i+1]; | |
46d14a58 | 459 | return 1; |
f078f209 LR |
460 | } |
461 | } | |
462 | ||
463 | /* No more valid rates */ | |
464 | *next_idx = 0; | |
2c5a744d | 465 | |
46d14a58 | 466 | return 0; |
f078f209 LR |
467 | } |
468 | ||
469 | /* Return true only for single stream */ | |
470 | ||
471 | static int ath_rc_valid_phyrate(u32 phy, u32 capflag, int ignore_cw) | |
472 | { | |
b657eade | 473 | if (WLAN_RC_PHY_HT(phy) && !(capflag & WLAN_RC_HT_FLAG)) |
46d14a58 | 474 | return 0; |
f078f209 | 475 | if (WLAN_RC_PHY_DS(phy) && !(capflag & WLAN_RC_DS_FLAG)) |
46d14a58 | 476 | return 0; |
1d9d06a2 SB |
477 | if (WLAN_RC_PHY_TS(phy) && !(capflag & WLAN_RC_TS_FLAG)) |
478 | return 0; | |
f078f209 | 479 | if (WLAN_RC_PHY_SGI(phy) && !(capflag & WLAN_RC_SGI_FLAG)) |
46d14a58 | 480 | return 0; |
f078f209 LR |
481 | if (!ignore_cw && WLAN_RC_PHY_HT(phy)) |
482 | if (WLAN_RC_PHY_40(phy) && !(capflag & WLAN_RC_40_FLAG)) | |
46d14a58 | 483 | return 0; |
46d14a58 | 484 | return 1; |
f078f209 LR |
485 | } |
486 | ||
487 | static inline int | |
39448b0a LR |
488 | ath_rc_get_lower_rix(const struct ath_rate_table *rate_table, |
489 | struct ath_rate_priv *ath_rc_priv, | |
490 | u8 cur_valid_txrate, u8 *next_idx) | |
f078f209 LR |
491 | { |
492 | int8_t i; | |
493 | ||
256b7759 S |
494 | for (i = 1; i < ath_rc_priv->max_valid_rate ; i++) { |
495 | if (ath_rc_priv->valid_rate_index[i] == cur_valid_txrate) { | |
496 | *next_idx = ath_rc_priv->valid_rate_index[i-1]; | |
46d14a58 | 497 | return 1; |
f078f209 LR |
498 | } |
499 | } | |
2c5a744d | 500 | |
46d14a58 | 501 | return 0; |
f078f209 LR |
502 | } |
503 | ||
2c5a744d | 504 | static u8 ath_rc_init_validrates(struct ath_rate_priv *ath_rc_priv, |
4f0fc7c3 | 505 | const struct ath_rate_table *rate_table, |
2c5a744d | 506 | u32 capflag) |
f078f209 | 507 | { |
f078f209 | 508 | u8 i, hi = 0; |
f078f209 | 509 | |
f078f209 | 510 | for (i = 0; i < rate_table->rate_cnt; i++) { |
f63b340d | 511 | if (rate_table->info[i].rate_flags & RC_LEGACY) { |
f078f209 LR |
512 | u32 phy = rate_table->info[i].phy; |
513 | u8 valid_rate_count = 0; | |
514 | ||
46d14a58 | 515 | if (!ath_rc_valid_phyrate(phy, capflag, 0)) |
f078f209 LR |
516 | continue; |
517 | ||
256b7759 | 518 | valid_rate_count = ath_rc_priv->valid_phy_ratecnt[phy]; |
f078f209 | 519 | |
256b7759 S |
520 | ath_rc_priv->valid_phy_rateidx[phy][valid_rate_count] = i; |
521 | ath_rc_priv->valid_phy_ratecnt[phy] += 1; | |
46d14a58 | 522 | ath_rc_set_valid_txmask(ath_rc_priv, i, 1); |
f63b340d | 523 | hi = i; |
f078f209 LR |
524 | } |
525 | } | |
2c5a744d | 526 | |
f078f209 LR |
527 | return hi; |
528 | } | |
529 | ||
2c5a744d | 530 | static u8 ath_rc_setvalid_rates(struct ath_rate_priv *ath_rc_priv, |
4f0fc7c3 | 531 | const struct ath_rate_table *rate_table, |
2c5a744d S |
532 | struct ath_rateset *rateset, |
533 | u32 capflag) | |
f078f209 | 534 | { |
f078f209 | 535 | u8 i, j, hi = 0; |
f078f209 LR |
536 | |
537 | /* Use intersection of working rates and valid rates */ | |
538 | for (i = 0; i < rateset->rs_nrates; i++) { | |
539 | for (j = 0; j < rate_table->rate_cnt; j++) { | |
540 | u32 phy = rate_table->info[j].phy; | |
f63b340d | 541 | u16 rate_flags = rate_table->info[i].rate_flags; |
2c5a744d S |
542 | u8 rate = rateset->rs_rates[i]; |
543 | u8 dot11rate = rate_table->info[j].dot11rate; | |
f078f209 LR |
544 | |
545 | /* We allow a rate only if its valid and the | |
546 | * capflag matches one of the validity | |
46d14a58 | 547 | * (VALID/VALID_20/VALID_40) flags */ |
f078f209 | 548 | |
545750d3 | 549 | if ((rate == dot11rate) && |
f63b340d SB |
550 | (rate_flags & WLAN_RC_CAP_MODE(capflag)) == |
551 | WLAN_RC_CAP_MODE(capflag) && | |
552 | (rate_flags & WLAN_RC_CAP_STREAM(capflag)) && | |
2c5a744d | 553 | !WLAN_RC_PHY_HT(phy)) { |
f078f209 LR |
554 | u8 valid_rate_count = 0; |
555 | ||
46d14a58 | 556 | if (!ath_rc_valid_phyrate(phy, capflag, 0)) |
f078f209 LR |
557 | continue; |
558 | ||
559 | valid_rate_count = | |
256b7759 | 560 | ath_rc_priv->valid_phy_ratecnt[phy]; |
f078f209 | 561 | |
256b7759 | 562 | ath_rc_priv->valid_phy_rateidx[phy] |
f078f209 | 563 | [valid_rate_count] = j; |
256b7759 | 564 | ath_rc_priv->valid_phy_ratecnt[phy] += 1; |
46d14a58 | 565 | ath_rc_set_valid_txmask(ath_rc_priv, j, 1); |
f078f209 LR |
566 | hi = A_MAX(hi, j); |
567 | } | |
568 | } | |
569 | } | |
2c5a744d | 570 | |
f078f209 LR |
571 | return hi; |
572 | } | |
573 | ||
2c5a744d | 574 | static u8 ath_rc_setvalid_htrates(struct ath_rate_priv *ath_rc_priv, |
4f0fc7c3 | 575 | const struct ath_rate_table *rate_table, |
2c5a744d | 576 | u8 *mcs_set, u32 capflag) |
f078f209 | 577 | { |
2c5a744d S |
578 | struct ath_rateset *rateset = (struct ath_rateset *)mcs_set; |
579 | ||
f078f209 | 580 | u8 i, j, hi = 0; |
f078f209 LR |
581 | |
582 | /* Use intersection of working rates and valid rates */ | |
2c5a744d | 583 | for (i = 0; i < rateset->rs_nrates; i++) { |
f078f209 LR |
584 | for (j = 0; j < rate_table->rate_cnt; j++) { |
585 | u32 phy = rate_table->info[j].phy; | |
f63b340d | 586 | u16 rate_flags = rate_table->info[j].rate_flags; |
2c5a744d S |
587 | u8 rate = rateset->rs_rates[i]; |
588 | u8 dot11rate = rate_table->info[j].dot11rate; | |
f078f209 | 589 | |
545750d3 | 590 | if ((rate != dot11rate) || !WLAN_RC_PHY_HT(phy) || |
f63b340d SB |
591 | !(rate_flags & WLAN_RC_CAP_STREAM(capflag)) || |
592 | !WLAN_RC_PHY_HT_VALID(rate_flags, capflag)) | |
f078f209 LR |
593 | continue; |
594 | ||
46d14a58 | 595 | if (!ath_rc_valid_phyrate(phy, capflag, 0)) |
f078f209 LR |
596 | continue; |
597 | ||
256b7759 S |
598 | ath_rc_priv->valid_phy_rateidx[phy] |
599 | [ath_rc_priv->valid_phy_ratecnt[phy]] = j; | |
600 | ath_rc_priv->valid_phy_ratecnt[phy] += 1; | |
46d14a58 | 601 | ath_rc_set_valid_txmask(ath_rc_priv, j, 1); |
f078f209 LR |
602 | hi = A_MAX(hi, j); |
603 | } | |
604 | } | |
f078f209 | 605 | |
2c5a744d | 606 | return hi; |
f078f209 LR |
607 | } |
608 | ||
201c3b41 LR |
609 | /* Finds the highest rate index we can use */ |
610 | static u8 ath_rc_get_highest_rix(struct ath_softc *sc, | |
611 | struct ath_rate_priv *ath_rc_priv, | |
612 | const struct ath_rate_table *rate_table, | |
613 | int *is_probing) | |
f078f209 | 614 | { |
39a4cafe | 615 | u32 best_thruput, this_thruput, now_msec; |
f078f209 | 616 | u8 rate, next_rate, best_rate, maxindex, minindex; |
39a4cafe | 617 | int8_t index = 0; |
f078f209 LR |
618 | |
619 | now_msec = jiffies_to_msecs(jiffies); | |
39a4cafe | 620 | *is_probing = 0; |
f078f209 | 621 | best_thruput = 0; |
256b7759 | 622 | maxindex = ath_rc_priv->max_valid_rate-1; |
f078f209 LR |
623 | minindex = 0; |
624 | best_rate = minindex; | |
625 | ||
626 | /* | |
627 | * Try the higher rate first. It will reduce memory moving time | |
628 | * if we have very good channel characteristics. | |
629 | */ | |
630 | for (index = maxindex; index >= minindex ; index--) { | |
631 | u8 per_thres; | |
632 | ||
256b7759 S |
633 | rate = ath_rc_priv->valid_rate_index[index]; |
634 | if (rate > ath_rc_priv->rate_max_phy) | |
f078f209 LR |
635 | continue; |
636 | ||
637 | /* | |
638 | * For TCP the average collision rate is around 11%, | |
639 | * so we ignore PERs less than this. This is to | |
640 | * prevent the rate we are currently using (whose | |
641 | * PER might be in the 10-15 range because of TCP | |
642 | * collisions) looking worse than the next lower | |
643 | * rate whose PER has decayed close to 0. If we | |
644 | * used to next lower rate, its PER would grow to | |
645 | * 10-15 and we would be worse off then staying | |
646 | * at the current rate. | |
647 | */ | |
922bac60 | 648 | per_thres = ath_rc_priv->per[rate]; |
f078f209 LR |
649 | if (per_thres < 12) |
650 | per_thres = 12; | |
651 | ||
652 | this_thruput = rate_table->info[rate].user_ratekbps * | |
653 | (100 - per_thres); | |
654 | ||
655 | if (best_thruput <= this_thruput) { | |
656 | best_thruput = this_thruput; | |
657 | best_rate = rate; | |
658 | } | |
659 | } | |
660 | ||
661 | rate = best_rate; | |
f078f209 LR |
662 | |
663 | /* | |
664 | * Must check the actual rate (ratekbps) to account for | |
665 | * non-monoticity of 11g's rate table | |
666 | */ | |
667 | ||
3900898c | 668 | if (rate >= ath_rc_priv->rate_max_phy) { |
256b7759 | 669 | rate = ath_rc_priv->rate_max_phy; |
f078f209 LR |
670 | |
671 | /* Probe the next allowed phy state */ | |
f078f209 | 672 | if (ath_rc_get_nextvalid_txrate(rate_table, |
3900898c | 673 | ath_rc_priv, rate, &next_rate) && |
256b7759 | 674 | (now_msec - ath_rc_priv->probe_time > |
f078f209 | 675 | rate_table->probe_interval) && |
256b7759 | 676 | (ath_rc_priv->hw_maxretry_pktcnt >= 1)) { |
f078f209 | 677 | rate = next_rate; |
256b7759 S |
678 | ath_rc_priv->probe_rate = rate; |
679 | ath_rc_priv->probe_time = now_msec; | |
680 | ath_rc_priv->hw_maxretry_pktcnt = 0; | |
46d14a58 | 681 | *is_probing = 1; |
f078f209 LR |
682 | } |
683 | } | |
684 | ||
256b7759 S |
685 | if (rate > (ath_rc_priv->rate_table_size - 1)) |
686 | rate = ath_rc_priv->rate_table_size - 1; | |
f078f209 | 687 | |
1d9d06a2 SB |
688 | if (RC_TS_ONLY(rate_table->info[rate].rate_flags) && |
689 | (ath_rc_priv->ht_cap & WLAN_RC_TS_FLAG)) | |
690 | return rate; | |
691 | ||
692 | if (RC_DS_OR_LATER(rate_table->info[rate].rate_flags) && | |
693 | (ath_rc_priv->ht_cap & (WLAN_RC_DS_FLAG | WLAN_RC_TS_FLAG))) | |
e43419f9 LR |
694 | return rate; |
695 | ||
f63b340d | 696 | if (RC_SS_OR_LEGACY(rate_table->info[rate].rate_flags)) |
e43419f9 LR |
697 | return rate; |
698 | ||
699 | /* This should not happen */ | |
700 | WARN_ON(1); | |
701 | ||
702 | rate = ath_rc_priv->valid_rate_index[0]; | |
f078f209 LR |
703 | |
704 | return rate; | |
705 | } | |
706 | ||
4f0fc7c3 | 707 | static void ath_rc_rate_set_series(const struct ath_rate_table *rate_table, |
a8efee4f | 708 | struct ieee80211_tx_rate *rate, |
c89424df | 709 | struct ieee80211_tx_rate_control *txrc, |
2c5a744d | 710 | u8 tries, u8 rix, int rtsctsenable) |
f078f209 | 711 | { |
a8efee4f | 712 | rate->count = tries; |
545750d3 | 713 | rate->idx = rate_table->info[rix].ratecode; |
a8efee4f | 714 | |
c89424df S |
715 | if (txrc->short_preamble) |
716 | rate->flags |= IEEE80211_TX_RC_USE_SHORT_PREAMBLE; | |
717 | if (txrc->rts || rtsctsenable) | |
a8efee4f | 718 | rate->flags |= IEEE80211_TX_RC_USE_RTS_CTS; |
545750d3 FF |
719 | |
720 | if (WLAN_RC_PHY_HT(rate_table->info[rix].phy)) { | |
a8efee4f | 721 | rate->flags |= IEEE80211_TX_RC_MCS; |
545750d3 FF |
722 | if (WLAN_RC_PHY_40(rate_table->info[rix].phy)) |
723 | rate->flags |= IEEE80211_TX_RC_40_MHZ_WIDTH; | |
724 | if (WLAN_RC_PHY_SGI(rate_table->info[rix].phy)) | |
725 | rate->flags |= IEEE80211_TX_RC_SHORT_GI; | |
726 | } | |
f078f209 LR |
727 | } |
728 | ||
c89424df | 729 | static void ath_rc_rate_set_rtscts(struct ath_softc *sc, |
4f0fc7c3 | 730 | const struct ath_rate_table *rate_table, |
c89424df S |
731 | struct ieee80211_tx_info *tx_info) |
732 | { | |
733 | struct ieee80211_tx_rate *rates = tx_info->control.rates; | |
734 | int i = 0, rix = 0, cix, enable_g_protection = 0; | |
735 | ||
736 | /* get the cix for the lowest valid rix */ | |
737 | for (i = 3; i >= 0; i--) { | |
738 | if (rates[i].count && (rates[i].idx >= 0)) { | |
545750d3 | 739 | rix = ath_rc_get_rateindex(rate_table, &rates[i]); |
c89424df S |
740 | break; |
741 | } | |
742 | } | |
743 | cix = rate_table->info[rix].ctrl_rate; | |
744 | ||
745 | /* All protection frames are transmited at 2Mb/s for 802.11g, | |
746 | * otherwise we transmit them at 1Mb/s */ | |
747 | if (sc->hw->conf.channel->band == IEEE80211_BAND_2GHZ && | |
748 | !conf_is_ht(&sc->hw->conf)) | |
749 | enable_g_protection = 1; | |
750 | ||
751 | /* | |
752 | * If 802.11g protection is enabled, determine whether to use RTS/CTS or | |
753 | * just CTS. Note that this is only done for OFDM/HT unicast frames. | |
754 | */ | |
755 | if ((sc->sc_flags & SC_OP_PROTECT_ENABLE) && | |
c89424df S |
756 | (rate_table->info[rix].phy == WLAN_RC_PHY_OFDM || |
757 | WLAN_RC_PHY_HT(rate_table->info[rix].phy))) { | |
758 | rates[0].flags |= IEEE80211_TX_RC_USE_CTS_PROTECT; | |
759 | cix = rate_table->info[enable_g_protection].ctrl_rate; | |
760 | } | |
761 | ||
762 | tx_info->control.rts_cts_rate_idx = cix; | |
763 | } | |
764 | ||
e25739a1 LR |
765 | static void ath_get_rate(void *priv, struct ieee80211_sta *sta, void *priv_sta, |
766 | struct ieee80211_tx_rate_control *txrc) | |
f078f209 | 767 | { |
e25739a1 LR |
768 | struct ath_softc *sc = priv; |
769 | struct ath_rate_priv *ath_rc_priv = priv_sta; | |
4f0fc7c3 | 770 | const struct ath_rate_table *rate_table; |
3900898c S |
771 | struct sk_buff *skb = txrc->skb; |
772 | struct ieee80211_tx_info *tx_info = IEEE80211_SKB_CB(skb); | |
a8efee4f | 773 | struct ieee80211_tx_rate *rates = tx_info->control.rates; |
c89424df S |
774 | struct ieee80211_hdr *hdr = (struct ieee80211_hdr *)skb->data; |
775 | __le16 fc = hdr->frame_control; | |
5c0ba62f | 776 | u8 try_per_rate, i = 0, rix; |
3900898c | 777 | int is_probe = 0; |
f078f209 | 778 | |
e25739a1 LR |
779 | if (rate_control_send_low(sta, priv_sta, txrc)) |
780 | return; | |
781 | ||
dd190183 LR |
782 | /* |
783 | * For Multi Rate Retry we use a different number of | |
784 | * retry attempt counts. This ends up looking like this: | |
785 | * | |
65896510 FF |
786 | * MRR[0] = 4 |
787 | * MRR[1] = 4 | |
788 | * MRR[2] = 4 | |
789 | * MRR[3] = 8 | |
dd190183 LR |
790 | * |
791 | */ | |
65896510 | 792 | try_per_rate = 4; |
dd190183 | 793 | |
40990ec0 | 794 | rate_table = sc->cur_rate_table; |
201c3b41 | 795 | rix = ath_rc_get_highest_rix(sc, ath_rc_priv, rate_table, &is_probe); |
f078f209 | 796 | |
b0a33448 LR |
797 | /* |
798 | * If we're in HT mode and both us and our peer supports LDPC. | |
799 | * We don't need to check our own device's capabilities as our own | |
800 | * ht capabilities would have already been intersected with our peer's. | |
801 | */ | |
802 | if (conf_is_ht(&sc->hw->conf) && | |
803 | (sta->ht_cap.cap & IEEE80211_HT_CAP_LDPC_CODING)) | |
804 | tx_info->flags |= IEEE80211_TX_CTL_LDPC; | |
805 | ||
58b5190e FF |
806 | if (conf_is_ht(&sc->hw->conf) && |
807 | (sta->ht_cap.cap & IEEE80211_HT_CAP_TX_STBC)) | |
808 | tx_info->flags |= (1 << IEEE80211_TX_CTL_STBC_SHIFT); | |
809 | ||
3900898c | 810 | if (is_probe) { |
f078f209 LR |
811 | /* set one try for probe rates. For the |
812 | * probes don't enable rts */ | |
c89424df | 813 | ath_rc_rate_set_series(rate_table, &rates[i++], txrc, |
5c0ba62f | 814 | 1, rix, 0); |
f078f209 | 815 | |
f078f209 LR |
816 | /* Get the next tried/allowed rate. No RTS for the next series |
817 | * after the probe rate | |
818 | */ | |
5c0ba62f | 819 | ath_rc_get_lower_rix(rate_table, ath_rc_priv, rix, &rix); |
c89424df | 820 | ath_rc_rate_set_series(rate_table, &rates[i++], txrc, |
5c0ba62f | 821 | try_per_rate, rix, 0); |
14587ce2 VT |
822 | |
823 | tx_info->flags |= IEEE80211_TX_CTL_RATE_CTRL_PROBE; | |
f078f209 | 824 | } else { |
f078f209 | 825 | /* Set the choosen rate. No RTS for first series entry. */ |
c89424df | 826 | ath_rc_rate_set_series(rate_table, &rates[i++], txrc, |
5c0ba62f | 827 | try_per_rate, rix, 0); |
f078f209 LR |
828 | } |
829 | ||
830 | /* Fill in the other rates for multirate retry */ | |
3900898c | 831 | for ( ; i < 4; i++) { |
dd190183 LR |
832 | /* Use twice the number of tries for the last MRR segment. */ |
833 | if (i + 1 == 4) | |
65896510 | 834 | try_per_rate = 8; |
dd190183 | 835 | |
5c0ba62f | 836 | ath_rc_get_lower_rix(rate_table, ath_rc_priv, rix, &rix); |
f078f209 | 837 | /* All other rates in the series have RTS enabled */ |
c89424df | 838 | ath_rc_rate_set_series(rate_table, &rates[i], txrc, |
5c0ba62f | 839 | try_per_rate, rix, 1); |
f078f209 LR |
840 | } |
841 | ||
842 | /* | |
843 | * NB:Change rate series to enable aggregation when operating | |
844 | * at lower MCS rates. When first rate in series is MCS2 | |
845 | * in HT40 @ 2.4GHz, series should look like: | |
846 | * | |
847 | * {MCS2, MCS1, MCS0, MCS0}. | |
848 | * | |
849 | * When first rate in series is MCS3 in HT20 @ 2.4GHz, series should | |
850 | * look like: | |
851 | * | |
852 | * {MCS3, MCS2, MCS1, MCS1} | |
853 | * | |
854 | * So, set fourth rate in series to be same as third one for | |
855 | * above conditions. | |
856 | */ | |
3706de6f | 857 | if ((sc->hw->conf.channel->band == IEEE80211_BAND_2GHZ) && |
ecf70441 | 858 | (conf_is_ht(&sc->hw->conf))) { |
40990ec0 | 859 | u8 dot11rate = rate_table->info[rix].dot11rate; |
f078f209 LR |
860 | u8 phy = rate_table->info[rix].phy; |
861 | if (i == 4 && | |
862 | ((dot11rate == 2 && phy == WLAN_RC_PHY_HT_40_SS) || | |
dc2222a8 | 863 | (dot11rate == 3 && phy == WLAN_RC_PHY_HT_20_SS))) { |
a8efee4f S |
864 | rates[3].idx = rates[2].idx; |
865 | rates[3].flags = rates[2].flags; | |
f078f209 LR |
866 | } |
867 | } | |
c89424df S |
868 | |
869 | /* | |
870 | * Force hardware to use computed duration for next | |
871 | * fragment by disabling multi-rate retry, which | |
872 | * updates duration based on the multi-rate duration table. | |
873 | * | |
874 | * FIXME: Fix duration | |
875 | */ | |
7682a76d LR |
876 | if (ieee80211_has_morefrags(fc) || |
877 | (le16_to_cpu(hdr->seq_ctrl) & IEEE80211_SCTL_FRAG)) { | |
c89424df S |
878 | rates[1].count = rates[2].count = rates[3].count = 0; |
879 | rates[1].idx = rates[2].idx = rates[3].idx = 0; | |
880 | rates[0].count = ATH_TXMAXTRY; | |
881 | } | |
882 | ||
883 | /* Setup RTS/CTS */ | |
884 | ath_rc_rate_set_rtscts(sc, rate_table, tx_info); | |
f078f209 LR |
885 | } |
886 | ||
2c5a744d | 887 | static bool ath_rc_update_per(struct ath_softc *sc, |
4f0fc7c3 | 888 | const struct ath_rate_table *rate_table, |
2c5a744d | 889 | struct ath_rate_priv *ath_rc_priv, |
827e69bf | 890 | struct ieee80211_tx_info *tx_info, |
2c5a744d S |
891 | int tx_rate, int xretries, int retries, |
892 | u32 now_msec) | |
f078f209 | 893 | { |
2c5a744d | 894 | bool state_change = false; |
827e69bf | 895 | int count, n_bad_frames; |
f078f209 | 896 | u8 last_per; |
f078f209 LR |
897 | static u32 nretry_to_per_lookup[10] = { |
898 | 100 * 0 / 1, | |
899 | 100 * 1 / 4, | |
900 | 100 * 1 / 2, | |
901 | 100 * 3 / 4, | |
902 | 100 * 4 / 5, | |
903 | 100 * 5 / 6, | |
904 | 100 * 6 / 7, | |
905 | 100 * 7 / 8, | |
906 | 100 * 8 / 9, | |
907 | 100 * 9 / 10 | |
908 | }; | |
909 | ||
922bac60 | 910 | last_per = ath_rc_priv->per[tx_rate]; |
827e69bf | 911 | n_bad_frames = tx_info->status.ampdu_len - tx_info->status.ampdu_ack_len; |
f078f209 LR |
912 | |
913 | if (xretries) { | |
f078f209 | 914 | if (xretries == 1) { |
922bac60 VT |
915 | ath_rc_priv->per[tx_rate] += 30; |
916 | if (ath_rc_priv->per[tx_rate] > 100) | |
917 | ath_rc_priv->per[tx_rate] = 100; | |
f078f209 LR |
918 | } else { |
919 | /* xretries == 2 */ | |
87c1687d | 920 | count = ARRAY_SIZE(nretry_to_per_lookup); |
f078f209 LR |
921 | if (retries >= count) |
922 | retries = count - 1; | |
2c5a744d | 923 | |
f078f209 | 924 | /* new_PER = 7/8*old_PER + 1/8*(currentPER) */ |
922bac60 | 925 | ath_rc_priv->per[tx_rate] = |
2c5a744d | 926 | (u8)(last_per - (last_per >> 3) + (100 >> 3)); |
f078f209 LR |
927 | } |
928 | ||
929 | /* xretries == 1 or 2 */ | |
930 | ||
256b7759 S |
931 | if (ath_rc_priv->probe_rate == tx_rate) |
932 | ath_rc_priv->probe_rate = 0; | |
f078f209 | 933 | |
2c5a744d | 934 | } else { /* xretries == 0 */ |
87c1687d | 935 | count = ARRAY_SIZE(nretry_to_per_lookup); |
f078f209 LR |
936 | if (retries >= count) |
937 | retries = count - 1; | |
2c5a744d | 938 | |
827e69bf | 939 | if (n_bad_frames) { |
dc2222a8 | 940 | /* new_PER = 7/8*old_PER + 1/8*(currentPER) |
f078f209 LR |
941 | * Assuming that n_frames is not 0. The current PER |
942 | * from the retries is 100 * retries / (retries+1), | |
943 | * since the first retries attempts failed, and the | |
944 | * next one worked. For the one that worked, | |
945 | * n_bad_frames subframes out of n_frames wored, | |
946 | * so the PER for that part is | |
947 | * 100 * n_bad_frames / n_frames, and it contributes | |
948 | * 100 * n_bad_frames / (n_frames * (retries+1)) to | |
949 | * the above PER. The expression below is a | |
950 | * simplified version of the sum of these two terms. | |
951 | */ | |
827e69bf FF |
952 | if (tx_info->status.ampdu_len > 0) { |
953 | int n_frames, n_bad_tries; | |
2c5a744d S |
954 | u8 cur_per, new_per; |
955 | ||
827e69bf FF |
956 | n_bad_tries = retries * tx_info->status.ampdu_len + |
957 | n_bad_frames; | |
958 | n_frames = tx_info->status.ampdu_len * (retries + 1); | |
959 | cur_per = (100 * n_bad_tries / n_frames) >> 3; | |
2c5a744d | 960 | new_per = (u8)(last_per - (last_per >> 3) + cur_per); |
922bac60 | 961 | ath_rc_priv->per[tx_rate] = new_per; |
2c5a744d | 962 | } |
f078f209 | 963 | } else { |
922bac60 | 964 | ath_rc_priv->per[tx_rate] = |
2c5a744d S |
965 | (u8)(last_per - (last_per >> 3) + |
966 | (nretry_to_per_lookup[retries] >> 3)); | |
f078f209 LR |
967 | } |
968 | ||
f078f209 LR |
969 | |
970 | /* | |
971 | * If we got at most one retry then increase the max rate if | |
972 | * this was a probe. Otherwise, ignore the probe. | |
973 | */ | |
256b7759 | 974 | if (ath_rc_priv->probe_rate && ath_rc_priv->probe_rate == tx_rate) { |
827e69bf | 975 | if (retries > 0 || 2 * n_bad_frames > tx_info->status.ampdu_len) { |
f078f209 LR |
976 | /* |
977 | * Since we probed with just a single attempt, | |
978 | * any retries means the probe failed. Also, | |
979 | * if the attempt worked, but more than half | |
980 | * the subframes were bad then also consider | |
981 | * the probe a failure. | |
982 | */ | |
256b7759 | 983 | ath_rc_priv->probe_rate = 0; |
f078f209 LR |
984 | } else { |
985 | u8 probe_rate = 0; | |
986 | ||
2c5a744d S |
987 | ath_rc_priv->rate_max_phy = |
988 | ath_rc_priv->probe_rate; | |
256b7759 | 989 | probe_rate = ath_rc_priv->probe_rate; |
f078f209 | 990 | |
922bac60 VT |
991 | if (ath_rc_priv->per[probe_rate] > 30) |
992 | ath_rc_priv->per[probe_rate] = 20; | |
f078f209 | 993 | |
256b7759 | 994 | ath_rc_priv->probe_rate = 0; |
f078f209 LR |
995 | |
996 | /* | |
997 | * Since this probe succeeded, we allow the next | |
998 | * probe twice as soon. This allows the maxRate | |
999 | * to move up faster if the probes are | |
af901ca1 | 1000 | * successful. |
f078f209 | 1001 | */ |
2c5a744d S |
1002 | ath_rc_priv->probe_time = |
1003 | now_msec - rate_table->probe_interval / 2; | |
f078f209 LR |
1004 | } |
1005 | } | |
1006 | ||
1007 | if (retries > 0) { | |
1008 | /* | |
1009 | * Don't update anything. We don't know if | |
1010 | * this was because of collisions or poor signal. | |
f078f209 | 1011 | */ |
256b7759 | 1012 | ath_rc_priv->hw_maxretry_pktcnt = 0; |
f078f209 LR |
1013 | } else { |
1014 | /* | |
1015 | * It worked with no retries. First ignore bogus (small) | |
1016 | * rssi_ack values. | |
1017 | */ | |
256b7759 S |
1018 | if (tx_rate == ath_rc_priv->rate_max_phy && |
1019 | ath_rc_priv->hw_maxretry_pktcnt < 255) { | |
1020 | ath_rc_priv->hw_maxretry_pktcnt++; | |
f078f209 LR |
1021 | } |
1022 | ||
f078f209 LR |
1023 | } |
1024 | } | |
39a4cafe | 1025 | |
2c5a744d S |
1026 | return state_change; |
1027 | } | |
1028 | ||
1029 | /* Update PER, RSSI and whatever else that the code thinks it is doing. | |
1030 | If you can make sense of all this, you really need to go out more. */ | |
1031 | ||
1032 | static void ath_rc_update_ht(struct ath_softc *sc, | |
1033 | struct ath_rate_priv *ath_rc_priv, | |
827e69bf | 1034 | struct ieee80211_tx_info *tx_info, |
2c5a744d S |
1035 | int tx_rate, int xretries, int retries) |
1036 | { | |
2c5a744d S |
1037 | u32 now_msec = jiffies_to_msecs(jiffies); |
1038 | int rate; | |
1039 | u8 last_per; | |
1040 | bool state_change = false; | |
4f0fc7c3 | 1041 | const struct ath_rate_table *rate_table = sc->cur_rate_table; |
2c5a744d S |
1042 | int size = ath_rc_priv->rate_table_size; |
1043 | ||
1044 | if ((tx_rate < 0) || (tx_rate > rate_table->rate_cnt)) | |
1045 | return; | |
f078f209 | 1046 | |
922bac60 | 1047 | last_per = ath_rc_priv->per[tx_rate]; |
2c5a744d S |
1048 | |
1049 | /* Update PER first */ | |
1050 | state_change = ath_rc_update_per(sc, rate_table, ath_rc_priv, | |
827e69bf | 1051 | tx_info, tx_rate, xretries, |
2c5a744d | 1052 | retries, now_msec); |
f078f209 LR |
1053 | |
1054 | /* | |
1055 | * If this rate looks bad (high PER) then stop using it for | |
1056 | * a while (except if we are probing). | |
1057 | */ | |
922bac60 | 1058 | if (ath_rc_priv->per[tx_rate] >= 55 && tx_rate > 0 && |
dc2222a8 | 1059 | rate_table->info[tx_rate].ratekbps <= |
256b7759 | 1060 | rate_table->info[ath_rc_priv->rate_max_phy].ratekbps) { |
39448b0a LR |
1061 | ath_rc_get_lower_rix(rate_table, ath_rc_priv, |
1062 | (u8)tx_rate, &ath_rc_priv->rate_max_phy); | |
f078f209 LR |
1063 | |
1064 | /* Don't probe for a little while. */ | |
256b7759 | 1065 | ath_rc_priv->probe_time = now_msec; |
f078f209 LR |
1066 | } |
1067 | ||
f078f209 LR |
1068 | /* Make sure the rates below this have lower PER */ |
1069 | /* Monotonicity is kept only for rates below the current rate. */ | |
922bac60 | 1070 | if (ath_rc_priv->per[tx_rate] < last_per) { |
f078f209 | 1071 | for (rate = tx_rate - 1; rate >= 0; rate--) { |
f078f209 | 1072 | |
922bac60 VT |
1073 | if (ath_rc_priv->per[rate] > |
1074 | ath_rc_priv->per[rate+1]) { | |
1075 | ath_rc_priv->per[rate] = | |
1076 | ath_rc_priv->per[rate+1]; | |
f078f209 LR |
1077 | } |
1078 | } | |
1079 | } | |
1080 | ||
1081 | /* Maintain monotonicity for rates above the current rate */ | |
2c5a744d | 1082 | for (rate = tx_rate; rate < size - 1; rate++) { |
922bac60 VT |
1083 | if (ath_rc_priv->per[rate+1] < |
1084 | ath_rc_priv->per[rate]) | |
1085 | ath_rc_priv->per[rate+1] = | |
1086 | ath_rc_priv->per[rate]; | |
f078f209 LR |
1087 | } |
1088 | ||
f078f209 LR |
1089 | /* Every so often, we reduce the thresholds |
1090 | * and PER (different for CCK and OFDM). */ | |
256b7759 | 1091 | if (now_msec - ath_rc_priv->per_down_time >= |
c4130465 | 1092 | rate_table->probe_interval) { |
2c5a744d | 1093 | for (rate = 0; rate < size; rate++) { |
922bac60 VT |
1094 | ath_rc_priv->per[rate] = |
1095 | 7 * ath_rc_priv->per[rate] / 8; | |
f078f209 LR |
1096 | } |
1097 | ||
256b7759 | 1098 | ath_rc_priv->per_down_time = now_msec; |
f078f209 | 1099 | } |
2c5a744d | 1100 | |
9e712790 | 1101 | ath_debug_stat_retries(sc, tx_rate, xretries, retries, |
922bac60 | 1102 | ath_rc_priv->per[tx_rate]); |
029bc432 | 1103 | |
2c5a744d S |
1104 | } |
1105 | ||
4f0fc7c3 | 1106 | static int ath_rc_get_rateindex(const struct ath_rate_table *rate_table, |
2c5a744d S |
1107 | struct ieee80211_tx_rate *rate) |
1108 | { | |
1d9d06a2 SB |
1109 | int rix = 0, i = 0; |
1110 | int mcs_rix_off[] = { 7, 15, 20, 21, 22, 23 }; | |
2c5a744d | 1111 | |
545750d3 FF |
1112 | if (!(rate->flags & IEEE80211_TX_RC_MCS)) |
1113 | return rate->idx; | |
1114 | ||
1d9d06a2 SB |
1115 | while (rate->idx > mcs_rix_off[i] && |
1116 | i < sizeof(mcs_rix_off)/sizeof(int)) { | |
1117 | rix++; i++; | |
1118 | } | |
1119 | ||
1120 | rix += rate->idx + rate_table->mcs_start; | |
1121 | ||
2c5a744d S |
1122 | if ((rate->flags & IEEE80211_TX_RC_40_MHZ_WIDTH) && |
1123 | (rate->flags & IEEE80211_TX_RC_SHORT_GI)) | |
545750d3 | 1124 | rix = rate_table->info[rix].ht_index; |
2c5a744d | 1125 | else if (rate->flags & IEEE80211_TX_RC_SHORT_GI) |
545750d3 | 1126 | rix = rate_table->info[rix].sgi_index; |
2c5a744d | 1127 | else if (rate->flags & IEEE80211_TX_RC_40_MHZ_WIDTH) |
545750d3 | 1128 | rix = rate_table->info[rix].cw40index; |
2c5a744d S |
1129 | |
1130 | return rix; | |
f078f209 LR |
1131 | } |
1132 | ||
46d14a58 S |
1133 | static void ath_rc_tx_status(struct ath_softc *sc, |
1134 | struct ath_rate_priv *ath_rc_priv, | |
1135 | struct ieee80211_tx_info *tx_info, | |
1136 | int final_ts_idx, int xretries, int long_retry) | |
f078f209 | 1137 | { |
4f0fc7c3 | 1138 | const struct ath_rate_table *rate_table; |
a8efee4f | 1139 | struct ieee80211_tx_rate *rates = tx_info->status.rates; |
f078f209 | 1140 | u8 flags; |
2c5a744d | 1141 | u32 i = 0, rix; |
f078f209 | 1142 | |
40990ec0 | 1143 | rate_table = sc->cur_rate_table; |
f078f209 LR |
1144 | |
1145 | /* | |
1146 | * If the first rate is not the final index, there | |
1147 | * are intermediate rate failures to be processed. | |
1148 | */ | |
1149 | if (final_ts_idx != 0) { | |
1150 | /* Process intermediate rates that failed.*/ | |
2c5a744d S |
1151 | for (i = 0; i < final_ts_idx ; i++) { |
1152 | if (rates[i].count != 0 && (rates[i].idx >= 0)) { | |
1153 | flags = rates[i].flags; | |
1154 | ||
f078f209 LR |
1155 | /* If HT40 and we have switched mode from |
1156 | * 40 to 20 => don't update */ | |
2c5a744d | 1157 | |
a8efee4f | 1158 | if ((flags & IEEE80211_TX_RC_40_MHZ_WIDTH) && |
f5c38ef0 | 1159 | !(ath_rc_priv->ht_cap & WLAN_RC_40_FLAG)) |
f078f209 | 1160 | return; |
e63835b0 | 1161 | |
2c5a744d | 1162 | rix = ath_rc_get_rateindex(rate_table, &rates[i]); |
827e69bf FF |
1163 | ath_rc_update_ht(sc, ath_rc_priv, tx_info, |
1164 | rix, xretries ? 1 : 2, | |
2c5a744d | 1165 | rates[i].count); |
f078f209 LR |
1166 | } |
1167 | } | |
1168 | } else { | |
1169 | /* | |
1170 | * Handle the special case of MIMO PS burst, where the second | |
1171 | * aggregate is sent out with only one rate and one try. | |
1172 | * Treating it as an excessive retry penalizes the rate | |
1173 | * inordinately. | |
1174 | */ | |
a8efee4f | 1175 | if (rates[0].count == 1 && xretries == 1) |
f078f209 LR |
1176 | xretries = 2; |
1177 | } | |
1178 | ||
2c5a744d S |
1179 | flags = rates[i].flags; |
1180 | ||
f078f209 | 1181 | /* If HT40 and we have switched mode from 40 to 20 => don't update */ |
a8efee4f | 1182 | if ((flags & IEEE80211_TX_RC_40_MHZ_WIDTH) && |
f5c38ef0 | 1183 | !(ath_rc_priv->ht_cap & WLAN_RC_40_FLAG)) |
f078f209 LR |
1184 | return; |
1185 | ||
2c5a744d | 1186 | rix = ath_rc_get_rateindex(rate_table, &rates[i]); |
827e69bf | 1187 | ath_rc_update_ht(sc, ath_rc_priv, tx_info, rix, xretries, long_retry); |
f078f209 LR |
1188 | } |
1189 | ||
4f0fc7c3 LR |
1190 | static const |
1191 | struct ath_rate_table *ath_choose_rate_table(struct ath_softc *sc, | |
1192 | enum ieee80211_band band, | |
1193 | bool is_ht, | |
1194 | bool is_cw_40) | |
e11602b7 S |
1195 | { |
1196 | int mode = 0; | |
c46917bb | 1197 | struct ath_common *common = ath9k_hw_common(sc->sc_ah); |
e11602b7 S |
1198 | |
1199 | switch(band) { | |
1200 | case IEEE80211_BAND_2GHZ: | |
1201 | mode = ATH9K_MODE_11G; | |
1202 | if (is_ht) | |
1203 | mode = ATH9K_MODE_11NG_HT20; | |
1204 | if (is_cw_40) | |
1205 | mode = ATH9K_MODE_11NG_HT40PLUS; | |
1206 | break; | |
1207 | case IEEE80211_BAND_5GHZ: | |
1208 | mode = ATH9K_MODE_11A; | |
1209 | if (is_ht) | |
1210 | mode = ATH9K_MODE_11NA_HT20; | |
1211 | if (is_cw_40) | |
1212 | mode = ATH9K_MODE_11NA_HT40PLUS; | |
1213 | break; | |
1214 | default: | |
c46917bb | 1215 | ath_print(common, ATH_DBG_CONFIG, "Invalid band\n"); |
e11602b7 S |
1216 | return NULL; |
1217 | } | |
1218 | ||
1219 | BUG_ON(mode >= ATH9K_MODE_MAX); | |
1220 | ||
c46917bb LR |
1221 | ath_print(common, ATH_DBG_CONFIG, |
1222 | "Choosing rate table for mode: %d\n", mode); | |
545750d3 FF |
1223 | |
1224 | sc->cur_rate_mode = mode; | |
1225 | return hw_rate_table[mode]; | |
e11602b7 S |
1226 | } |
1227 | ||
5ddfac3b | 1228 | static void ath_rc_init(struct ath_softc *sc, |
46d14a58 | 1229 | struct ath_rate_priv *ath_rc_priv, |
5ddfac3b | 1230 | struct ieee80211_supported_band *sband, |
9331ec80 | 1231 | struct ieee80211_sta *sta, |
4f0fc7c3 | 1232 | const struct ath_rate_table *rate_table) |
f078f209 | 1233 | { |
5ddfac3b | 1234 | struct ath_rateset *rateset = &ath_rc_priv->neg_rates; |
c46917bb | 1235 | struct ath_common *common = ath9k_hw_common(sc->sc_ah); |
5ddfac3b | 1236 | u8 *ht_mcs = (u8 *)&ath_rc_priv->neg_ht_rates; |
f078f209 | 1237 | u8 i, j, k, hi = 0, hthi = 0; |
f078f209 LR |
1238 | |
1239 | /* Initial rate table size. Will change depending | |
1240 | * on the working rate set */ | |
46d14a58 | 1241 | ath_rc_priv->rate_table_size = RATE_TABLE_SIZE; |
f078f209 LR |
1242 | |
1243 | /* Initialize thresholds according to the global rate table */ | |
5ddfac3b | 1244 | for (i = 0 ; i < ath_rc_priv->rate_table_size; i++) { |
922bac60 | 1245 | ath_rc_priv->per[i] = 0; |
f078f209 LR |
1246 | } |
1247 | ||
1248 | /* Determine the valid rates */ | |
256b7759 | 1249 | ath_rc_init_valid_txmask(ath_rc_priv); |
f078f209 LR |
1250 | |
1251 | for (i = 0; i < WLAN_RC_PHY_MAX; i++) { | |
1252 | for (j = 0; j < MAX_TX_RATE_PHY; j++) | |
256b7759 S |
1253 | ath_rc_priv->valid_phy_rateidx[i][j] = 0; |
1254 | ath_rc_priv->valid_phy_ratecnt[i] = 0; | |
f078f209 | 1255 | } |
f078f209 | 1256 | |
f078f209 LR |
1257 | if (!rateset->rs_nrates) { |
1258 | /* No working rate, just initialize valid rates */ | |
2c5a744d | 1259 | hi = ath_rc_init_validrates(ath_rc_priv, rate_table, |
c89424df | 1260 | ath_rc_priv->ht_cap); |
f078f209 LR |
1261 | } else { |
1262 | /* Use intersection of working rates and valid rates */ | |
2c5a744d | 1263 | hi = ath_rc_setvalid_rates(ath_rc_priv, rate_table, |
c89424df | 1264 | rateset, ath_rc_priv->ht_cap); |
5ddfac3b | 1265 | if (ath_rc_priv->ht_cap & WLAN_RC_HT_FLAG) { |
2c5a744d | 1266 | hthi = ath_rc_setvalid_htrates(ath_rc_priv, |
c89424df S |
1267 | rate_table, |
1268 | ht_mcs, | |
1269 | ath_rc_priv->ht_cap); | |
f078f209 LR |
1270 | } |
1271 | hi = A_MAX(hi, hthi); | |
1272 | } | |
1273 | ||
256b7759 S |
1274 | ath_rc_priv->rate_table_size = hi + 1; |
1275 | ath_rc_priv->rate_max_phy = 0; | |
9680e8a3 | 1276 | BUG_ON(ath_rc_priv->rate_table_size > RATE_TABLE_SIZE); |
f078f209 LR |
1277 | |
1278 | for (i = 0, k = 0; i < WLAN_RC_PHY_MAX; i++) { | |
256b7759 S |
1279 | for (j = 0; j < ath_rc_priv->valid_phy_ratecnt[i]; j++) { |
1280 | ath_rc_priv->valid_rate_index[k++] = | |
1281 | ath_rc_priv->valid_phy_rateidx[i][j]; | |
f078f209 LR |
1282 | } |
1283 | ||
46d14a58 | 1284 | if (!ath_rc_valid_phyrate(i, rate_table->initial_ratemax, 1) |
256b7759 | 1285 | || !ath_rc_priv->valid_phy_ratecnt[i]) |
f078f209 LR |
1286 | continue; |
1287 | ||
256b7759 | 1288 | ath_rc_priv->rate_max_phy = ath_rc_priv->valid_phy_rateidx[i][j-1]; |
f078f209 | 1289 | } |
9680e8a3 LR |
1290 | BUG_ON(ath_rc_priv->rate_table_size > RATE_TABLE_SIZE); |
1291 | BUG_ON(k > RATE_TABLE_SIZE); | |
f078f209 | 1292 | |
256b7759 | 1293 | ath_rc_priv->max_valid_rate = k; |
256b7759 S |
1294 | ath_rc_sort_validrates(rate_table, ath_rc_priv); |
1295 | ath_rc_priv->rate_max_phy = ath_rc_priv->valid_rate_index[k-4]; | |
40990ec0 | 1296 | sc->cur_rate_table = rate_table; |
9331ec80 | 1297 | |
c46917bb LR |
1298 | ath_print(common, ATH_DBG_CONFIG, |
1299 | "RC Initialized with capabilities: 0x%x\n", | |
1300 | ath_rc_priv->ht_cap); | |
f078f209 LR |
1301 | } |
1302 | ||
c2da50e5 | 1303 | static u8 ath_rc_build_ht_caps(struct ath_softc *sc, struct ieee80211_sta *sta, |
6473d24d | 1304 | bool is_cw40, bool is_sgi) |
9331ec80 S |
1305 | { |
1306 | u8 caps = 0; | |
1307 | ||
c2da50e5 | 1308 | if (sta->ht_cap.ht_supported) { |
9331ec80 | 1309 | caps = WLAN_RC_HT_FLAG; |
1d9d06a2 SB |
1310 | if (sta->ht_cap.mcs.rx_mask[1] && sta->ht_cap.mcs.rx_mask[2]) |
1311 | caps |= WLAN_RC_TS_FLAG | WLAN_RC_DS_FLAG; | |
1312 | else if (sta->ht_cap.mcs.rx_mask[1]) | |
3553727c | 1313 | caps |= WLAN_RC_DS_FLAG; |
9331ec80 S |
1314 | if (is_cw40) |
1315 | caps |= WLAN_RC_40_FLAG; | |
6473d24d | 1316 | if (is_sgi) |
9331ec80 S |
1317 | caps |= WLAN_RC_SGI_FLAG; |
1318 | } | |
1319 | ||
1320 | return caps; | |
1321 | } | |
1322 | ||
334b0602 FF |
1323 | static bool ath_tx_aggr_check(struct ath_softc *sc, struct ath_node *an, |
1324 | u8 tidno) | |
1325 | { | |
1326 | struct ath_atx_tid *txtid; | |
1327 | ||
1328 | if (!(sc->sc_flags & SC_OP_TXAGGR)) | |
1329 | return false; | |
1330 | ||
1331 | txtid = ATH_AN_2_TID(an, tidno); | |
1332 | ||
1333 | if (!(txtid->state & (AGGR_ADDBA_COMPLETE | AGGR_ADDBA_PROGRESS))) | |
1334 | return true; | |
1335 | return false; | |
1336 | } | |
1337 | ||
1338 | ||
9331ec80 S |
1339 | /***********************************/ |
1340 | /* mac80211 Rate Control callbacks */ | |
1341 | /***********************************/ | |
1342 | ||
4b7679a5 JB |
1343 | static void ath_tx_status(void *priv, struct ieee80211_supported_band *sband, |
1344 | struct ieee80211_sta *sta, void *priv_sta, | |
f078f209 LR |
1345 | struct sk_buff *skb) |
1346 | { | |
1347 | struct ath_softc *sc = priv; | |
46d14a58 | 1348 | struct ath_rate_priv *ath_rc_priv = priv_sta; |
f078f209 LR |
1349 | struct ieee80211_tx_info *tx_info = IEEE80211_SKB_CB(skb); |
1350 | struct ieee80211_hdr *hdr; | |
827e69bf FF |
1351 | int final_ts_idx = 0, tx_status = 0, is_underrun = 0; |
1352 | int long_retry = 0; | |
f078f209 | 1353 | __le16 fc; |
827e69bf | 1354 | int i; |
f078f209 | 1355 | |
f078f209 LR |
1356 | hdr = (struct ieee80211_hdr *)skb->data; |
1357 | fc = hdr->frame_control; | |
827e69bf FF |
1358 | for (i = 0; i < IEEE80211_TX_MAX_RATES; i++) { |
1359 | struct ieee80211_tx_rate *rate = &tx_info->status.rates[i]; | |
1360 | if (!rate->count) | |
1361 | break; | |
1362 | ||
1363 | final_ts_idx = i; | |
1364 | long_retry = rate->count - 1; | |
1365 | } | |
f078f209 | 1366 | |
d969847c FF |
1367 | if (!priv_sta || !ieee80211_is_data(fc)) |
1368 | return; | |
1369 | ||
1370 | /* This packet was aggregated but doesn't carry status info */ | |
1371 | if ((tx_info->flags & IEEE80211_TX_CTL_AMPDU) && | |
1372 | !(tx_info->flags & IEEE80211_TX_STAT_AMPDU)) | |
827e69bf | 1373 | return; |
e6a9854b | 1374 | |
827e69bf FF |
1375 | if (tx_info->flags & IEEE80211_TX_STAT_TX_FILTERED) |
1376 | return; | |
e6a9854b | 1377 | |
a8909cfb BS |
1378 | if (!(tx_info->flags & IEEE80211_TX_STAT_AMPDU)) { |
1379 | tx_info->status.ampdu_ack_len = | |
1380 | (tx_info->flags & IEEE80211_TX_STAT_ACK ? 1 : 0); | |
1381 | tx_info->status.ampdu_len = 1; | |
1382 | } | |
1383 | ||
46d14a58 | 1384 | /* |
f4709fdf LR |
1385 | * If an underrun error is seen assume it as an excessive retry only |
1386 | * if max frame trigger level has been reached (2 KB for singel stream, | |
1387 | * and 4 KB for dual stream). Adjust the long retry as if the frame was | |
1388 | * tried hw->max_rate_tries times to affect how ratectrl updates PER for | |
1389 | * the failed rate. In case of congestion on the bus penalizing these | |
1390 | * type of underruns should help hardware actually transmit new frames | |
1391 | * successfully by eventually preferring slower rates. This itself | |
1392 | * should also alleviate congestion on the bus. | |
46d14a58 | 1393 | */ |
827e69bf FF |
1394 | if ((tx_info->pad[0] & ATH_TX_INFO_UNDERRUN) && |
1395 | (sc->sc_ah->tx_trig_level >= ath_rc_priv->tx_triglevel_max)) { | |
46d14a58 S |
1396 | tx_status = 1; |
1397 | is_underrun = 1; | |
1398 | } | |
1399 | ||
827e69bf | 1400 | if (tx_info->pad[0] & ATH_TX_INFO_XRETRY) |
46d14a58 S |
1401 | tx_status = 1; |
1402 | ||
1403 | ath_rc_tx_status(sc, ath_rc_priv, tx_info, final_ts_idx, tx_status, | |
827e69bf | 1404 | (is_underrun) ? sc->hw->max_rate_tries : long_retry); |
46d14a58 | 1405 | |
d22b0022 | 1406 | /* Check if aggregation has to be enabled for this tid */ |
d5c232ff VT |
1407 | if (conf_is_ht(&sc->hw->conf) && |
1408 | !(skb->protocol == cpu_to_be16(ETH_P_PAE))) { | |
d22b0022 S |
1409 | if (ieee80211_is_data_qos(fc)) { |
1410 | u8 *qc, tid; | |
1411 | struct ath_node *an; | |
1412 | ||
1413 | qc = ieee80211_get_qos_ctl(hdr); | |
1414 | tid = qc[0] & 0xf; | |
1415 | an = (struct ath_node *)sta->drv_priv; | |
1416 | ||
1417 | if(ath_tx_aggr_check(sc, an, tid)) | |
c951ad35 | 1418 | ieee80211_start_tx_ba_session(sta, tid); |
d22b0022 S |
1419 | } |
1420 | } | |
7a7dec65 | 1421 | |
545750d3 FF |
1422 | ath_debug_stat_rc(sc, ath_rc_get_rateindex(sc->cur_rate_table, |
1423 | &tx_info->status.rates[final_ts_idx])); | |
f078f209 LR |
1424 | } |
1425 | ||
4b7679a5 JB |
1426 | static void ath_rate_init(void *priv, struct ieee80211_supported_band *sband, |
1427 | struct ieee80211_sta *sta, void *priv_sta) | |
f078f209 | 1428 | { |
4b7679a5 | 1429 | struct ath_softc *sc = priv; |
46d14a58 | 1430 | struct ath_rate_priv *ath_rc_priv = priv_sta; |
545750d3 | 1431 | const struct ath_rate_table *rate_table; |
6473d24d | 1432 | bool is_cw40, is_sgi = false; |
f078f209 LR |
1433 | int i, j = 0; |
1434 | ||
7b4d2735 S |
1435 | for (i = 0; i < sband->n_bitrates; i++) { |
1436 | if (sta->supp_rates[sband->band] & BIT(i)) { | |
1437 | ath_rc_priv->neg_rates.rs_rates[j] | |
1438 | = (sband->bitrates[i].bitrate * 2) / 10; | |
1439 | j++; | |
1440 | } | |
1441 | } | |
1442 | ath_rc_priv->neg_rates.rs_nrates = j; | |
f078f209 | 1443 | |
a4510bf8 | 1444 | if (sta->ht_cap.ht_supported) { |
7b4d2735 | 1445 | for (i = 0, j = 0; i < 77; i++) { |
ae5eb026 | 1446 | if (sta->ht_cap.mcs.rx_mask[i/8] & (1<<(i%8))) |
dc2222a8 | 1447 | ath_rc_priv->neg_ht_rates.rs_rates[j++] = i; |
f078f209 LR |
1448 | if (j == ATH_RATE_MAX) |
1449 | break; | |
1450 | } | |
dc2222a8 | 1451 | ath_rc_priv->neg_ht_rates.rs_nrates = j; |
f078f209 | 1452 | } |
7b4d2735 | 1453 | |
9331ec80 | 1454 | is_cw40 = sta->ht_cap.cap & IEEE80211_HT_CAP_SUP_WIDTH_20_40; |
6473d24d VT |
1455 | |
1456 | if (is_cw40) | |
1457 | is_sgi = sta->ht_cap.cap & IEEE80211_HT_CAP_SGI_40; | |
1458 | else if (sc->sc_ah->caps.hw_caps & ATH9K_HW_CAP_SGI_20) | |
1459 | is_sgi = sta->ht_cap.cap & IEEE80211_HT_CAP_SGI_20; | |
9331ec80 S |
1460 | |
1461 | /* Choose rate table first */ | |
1462 | ||
1463 | if ((sc->sc_ah->opmode == NL80211_IFTYPE_STATION) || | |
9cb5412b | 1464 | (sc->sc_ah->opmode == NL80211_IFTYPE_MESH_POINT) || |
9331ec80 S |
1465 | (sc->sc_ah->opmode == NL80211_IFTYPE_ADHOC)) { |
1466 | rate_table = ath_choose_rate_table(sc, sband->band, | |
545750d3 FF |
1467 | sta->ht_cap.ht_supported, is_cw40); |
1468 | } else { | |
1469 | rate_table = hw_rate_table[sc->cur_rate_mode]; | |
9331ec80 S |
1470 | } |
1471 | ||
6473d24d | 1472 | ath_rc_priv->ht_cap = ath_rc_build_ht_caps(sc, sta, is_cw40, is_sgi); |
9331ec80 S |
1473 | ath_rc_init(sc, priv_sta, sband, sta, rate_table); |
1474 | } | |
1475 | ||
1476 | static void ath_rate_update(void *priv, struct ieee80211_supported_band *sband, | |
1477 | struct ieee80211_sta *sta, void *priv_sta, | |
4fa00437 | 1478 | u32 changed, enum nl80211_channel_type oper_chan_type) |
9331ec80 S |
1479 | { |
1480 | struct ath_softc *sc = priv; | |
1481 | struct ath_rate_priv *ath_rc_priv = priv_sta; | |
4f0fc7c3 | 1482 | const struct ath_rate_table *rate_table = NULL; |
6473d24d | 1483 | bool oper_cw40 = false, oper_sgi; |
9331ec80 S |
1484 | bool local_cw40 = (ath_rc_priv->ht_cap & WLAN_RC_40_FLAG) ? |
1485 | true : false; | |
6473d24d | 1486 | bool local_sgi = (ath_rc_priv->ht_cap & WLAN_RC_SGI_FLAG) ? |
9331ec80 S |
1487 | true : false; |
1488 | ||
1489 | /* FIXME: Handle AP mode later when we support CWM */ | |
1490 | ||
1491 | if (changed & IEEE80211_RC_HT_CHANGED) { | |
1492 | if (sc->sc_ah->opmode != NL80211_IFTYPE_STATION) | |
1493 | return; | |
1494 | ||
4fa00437 S |
1495 | if (oper_chan_type == NL80211_CHAN_HT40MINUS || |
1496 | oper_chan_type == NL80211_CHAN_HT40PLUS) | |
9331ec80 S |
1497 | oper_cw40 = true; |
1498 | ||
6473d24d VT |
1499 | if (oper_cw40) |
1500 | oper_sgi = (sta->ht_cap.cap & IEEE80211_HT_CAP_SGI_40) ? | |
1501 | true : false; | |
1502 | else if (sc->sc_ah->caps.hw_caps & ATH9K_HW_CAP_SGI_20) | |
1503 | oper_sgi = (sta->ht_cap.cap & IEEE80211_HT_CAP_SGI_20) ? | |
1504 | true : false; | |
1505 | else | |
1506 | oper_sgi = false; | |
9331ec80 | 1507 | |
6473d24d | 1508 | if ((local_cw40 != oper_cw40) || (local_sgi != oper_sgi)) { |
9331ec80 S |
1509 | rate_table = ath_choose_rate_table(sc, sband->band, |
1510 | sta->ht_cap.ht_supported, | |
1511 | oper_cw40); | |
c2da50e5 | 1512 | ath_rc_priv->ht_cap = ath_rc_build_ht_caps(sc, sta, |
6473d24d | 1513 | oper_cw40, oper_sgi); |
9331ec80 S |
1514 | ath_rc_init(sc, priv_sta, sband, sta, rate_table); |
1515 | ||
c46917bb LR |
1516 | ath_print(ath9k_hw_common(sc->sc_ah), ATH_DBG_CONFIG, |
1517 | "Operating HT Bandwidth changed to: %d\n", | |
1518 | sc->hw->conf.channel_type); | |
545750d3 | 1519 | sc->cur_rate_table = hw_rate_table[sc->cur_rate_mode]; |
9331ec80 S |
1520 | } |
1521 | } | |
f078f209 LR |
1522 | } |
1523 | ||
4b7679a5 | 1524 | static void *ath_rate_alloc(struct ieee80211_hw *hw, struct dentry *debugfsdir) |
f078f209 | 1525 | { |
bce048d7 JM |
1526 | struct ath_wiphy *aphy = hw->priv; |
1527 | return aphy->sc; | |
f078f209 LR |
1528 | } |
1529 | ||
1530 | static void ath_rate_free(void *priv) | |
1531 | { | |
1532 | return; | |
1533 | } | |
1534 | ||
4b7679a5 | 1535 | static void *ath_rate_alloc_sta(void *priv, struct ieee80211_sta *sta, gfp_t gfp) |
f078f209 LR |
1536 | { |
1537 | struct ath_softc *sc = priv; | |
46d14a58 | 1538 | struct ath_rate_priv *rate_priv; |
f078f209 | 1539 | |
46d14a58 | 1540 | rate_priv = kzalloc(sizeof(struct ath_rate_priv), gfp); |
f078f209 | 1541 | if (!rate_priv) { |
c46917bb LR |
1542 | ath_print(ath9k_hw_common(sc->sc_ah), ATH_DBG_FATAL, |
1543 | "Unable to allocate private rc structure\n"); | |
f078f209 LR |
1544 | return NULL; |
1545 | } | |
fe60594a | 1546 | |
2660b81a | 1547 | rate_priv->tx_triglevel_max = sc->sc_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, | |
9331ec80 | 1565 | .rate_update = ath_rate_update, |
f078f209 LR |
1566 | .alloc = ath_rate_alloc, |
1567 | .free = ath_rate_free, | |
1568 | .alloc_sta = ath_rate_alloc_sta, | |
4b7679a5 | 1569 | .free_sta = ath_rate_free_sta, |
f078f209 LR |
1570 | }; |
1571 | ||
1572 | int ath_rate_control_register(void) | |
1573 | { | |
1574 | return ieee80211_rate_control_register(&ath_rate_ops); | |
1575 | } | |
1576 | ||
1577 | void ath_rate_control_unregister(void) | |
1578 | { | |
1579 | ieee80211_rate_control_unregister(&ath_rate_ops); | |
1580 | } |