]>
Commit | Line | Data |
---|---|---|
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 | { |
f63b340d | 26 | { RC_L_SD, WLAN_RC_PHY_OFDM, 6000, /* 6 Mb */ |
1fe8234a | 27 | 5400, 0, 12, 0, 0, 0, 0, 0 }, |
f63b340d | 28 | { RC_L_SD, WLAN_RC_PHY_OFDM, 9000, /* 9 Mb */ |
1fe8234a | 29 | 7800, 1, 18, 0, 1, 1, 1, 1 }, |
f63b340d | 30 | { RC_L_SD, WLAN_RC_PHY_OFDM, 12000, /* 12 Mb */ |
1fe8234a | 31 | 10000, 2, 24, 2, 2, 2, 2, 2 }, |
f63b340d | 32 | { RC_L_SD, WLAN_RC_PHY_OFDM, 18000, /* 18 Mb */ |
1fe8234a | 33 | 13900, 3, 36, 2, 3, 3, 3, 3 }, |
f63b340d | 34 | { RC_L_SD, WLAN_RC_PHY_OFDM, 24000, /* 24 Mb */ |
1fe8234a | 35 | 17300, 4, 48, 4, 4, 4, 4, 4 }, |
f63b340d | 36 | { RC_L_SD, WLAN_RC_PHY_OFDM, 36000, /* 36 Mb */ |
1fe8234a | 37 | 23000, 5, 72, 4, 5, 5, 5, 5 }, |
f63b340d | 38 | { RC_L_SD, WLAN_RC_PHY_OFDM, 48000, /* 48 Mb */ |
1fe8234a | 39 | 27400, 6, 96, 4, 6, 6, 6, 6 }, |
f63b340d | 40 | { RC_L_SD, WLAN_RC_PHY_OFDM, 54000, /* 54 Mb */ |
1fe8234a | 41 | 29300, 7, 108, 4, 7, 7, 7, 7 }, |
f63b340d | 42 | { RC_HT_SD_2040, WLAN_RC_PHY_HT_20_SS, 6500, /* 6.5 Mb */ |
6473d24d | 43 | 6400, 0, 0, 0, 8, 25, 8, 25 }, |
f63b340d | 44 | { RC_HT_SD_20, WLAN_RC_PHY_HT_20_SS, 13000, /* 13 Mb */ |
6473d24d | 45 | 12700, 1, 1, 2, 9, 26, 9, 26 }, |
f63b340d | 46 | { RC_HT_SD_20, WLAN_RC_PHY_HT_20_SS, 19500, /* 19.5 Mb */ |
6473d24d | 47 | 18800, 2, 2, 2, 10, 27, 10, 27 }, |
f63b340d | 48 | { RC_HT_SD_20, WLAN_RC_PHY_HT_20_SS, 26000, /* 26 Mb */ |
6473d24d | 49 | 25000, 3, 3, 4, 11, 28, 11, 28 }, |
f63b340d | 50 | { RC_HT_SD_20, WLAN_RC_PHY_HT_20_SS, 39000, /* 39 Mb */ |
6473d24d | 51 | 36700, 4, 4, 4, 12, 29, 12, 29 }, |
f63b340d | 52 | { RC_HT_S_20, WLAN_RC_PHY_HT_20_SS, 52000, /* 52 Mb */ |
6473d24d | 53 | 48100, 5, 5, 4, 13, 30, 13, 30 }, |
f63b340d | 54 | { RC_HT_S_20, WLAN_RC_PHY_HT_20_SS, 58500, /* 58.5 Mb */ |
6473d24d | 55 | 53500, 6, 6, 4, 14, 31, 14, 31 }, |
f63b340d | 56 | { RC_HT_S_20, WLAN_RC_PHY_HT_20_SS, 65000, /* 65 Mb */ |
6473d24d | 57 | 59000, 7, 7, 4, 15, 32, 15, 33 }, |
f63b340d | 58 | { RC_INVALID, WLAN_RC_PHY_HT_20_DS, 13000, /* 13 Mb */ |
6473d24d | 59 | 12700, 8, 8, 3, 16, 34, 16, 34 }, |
f63b340d | 60 | { RC_INVALID, WLAN_RC_PHY_HT_20_DS, 26000, /* 26 Mb */ |
6473d24d | 61 | 24800, 9, 9, 2, 17, 35, 17, 35 }, |
f63b340d | 62 | { RC_INVALID, WLAN_RC_PHY_HT_20_DS, 39000, /* 39 Mb */ |
6473d24d | 63 | 36600, 10, 10, 2, 18, 36, 18, 36 }, |
f63b340d | 64 | { RC_HT_D_20, WLAN_RC_PHY_HT_20_DS, 52000, /* 52 Mb */ |
6473d24d | 65 | 48100, 11, 11, 4, 19, 37, 19, 37 }, |
f63b340d | 66 | { RC_HT_D_20, WLAN_RC_PHY_HT_20_DS, 78000, /* 78 Mb */ |
6473d24d | 67 | 69500, 12, 12, 4, 20, 38, 20, 38 }, |
f63b340d | 68 | { RC_HT_D_20, WLAN_RC_PHY_HT_20_DS, 104000, /* 104 Mb */ |
6473d24d | 69 | 89500, 13, 13, 4, 21, 39, 21, 39 }, |
f63b340d | 70 | { RC_HT_D_20, WLAN_RC_PHY_HT_20_DS, 117000, /* 117 Mb */ |
6473d24d | 71 | 98900, 14, 14, 4, 22, 40, 22, 40 }, |
f63b340d | 72 | { RC_HT_D_20, WLAN_RC_PHY_HT_20_DS, 130000, /* 130 Mb */ |
6473d24d | 73 | 108300, 15, 15, 4, 23, 41, 24, 42 }, |
f63b340d | 74 | { RC_HT_D_20, WLAN_RC_PHY_HT_20_DS_HGI, 144400, /* 144.4 Mb */ |
6473d24d | 75 | 12000, 15, 15, 4, 23, 41, 24, 42 }, |
f63b340d | 76 | { RC_HT_SD_40, WLAN_RC_PHY_HT_40_SS, 13500, /* 13.5 Mb */ |
6473d24d | 77 | 13200, 0, 0, 0, 8, 25, 25, 25 }, |
f63b340d | 78 | { RC_HT_SD_40, WLAN_RC_PHY_HT_40_SS, 27500, /* 27.0 Mb */ |
6473d24d | 79 | 25900, 1, 1, 2, 9, 26, 26, 26 }, |
f63b340d | 80 | { RC_HT_SD_40, WLAN_RC_PHY_HT_40_SS, 40500, /* 40.5 Mb */ |
6473d24d | 81 | 38600, 2, 2, 2, 10, 27, 27, 27 }, |
f63b340d | 82 | { RC_HT_SD_40, WLAN_RC_PHY_HT_40_SS, 54000, /* 54 Mb */ |
6473d24d | 83 | 49800, 3, 3, 4, 11, 28, 28, 28 }, |
f63b340d | 84 | { RC_HT_SD_40, WLAN_RC_PHY_HT_40_SS, 81500, /* 81 Mb */ |
6473d24d | 85 | 72200, 4, 4, 4, 12, 29, 29, 29 }, |
f63b340d | 86 | { RC_HT_S_40, WLAN_RC_PHY_HT_40_SS, 108000, /* 108 Mb */ |
6473d24d | 87 | 92900, 5, 5, 4, 13, 30, 30, 30 }, |
f63b340d | 88 | { RC_HT_S_40, WLAN_RC_PHY_HT_40_SS, 121500, /* 121.5 Mb */ |
6473d24d | 89 | 102700, 6, 6, 4, 14, 31, 31, 31 }, |
f63b340d | 90 | { RC_HT_S_40, WLAN_RC_PHY_HT_40_SS, 135000, /* 135 Mb */ |
6473d24d | 91 | 112000, 7, 7, 4, 15, 32, 33, 33 }, |
f63b340d | 92 | { RC_HT_S_40, WLAN_RC_PHY_HT_40_SS_HGI, 150000, /* 150 Mb */ |
6473d24d | 93 | 122000, 7, 7, 4, 15, 32, 33, 33 }, |
f63b340d | 94 | { RC_INVALID, WLAN_RC_PHY_HT_40_DS, 27000, /* 27 Mb */ |
6473d24d | 95 | 25800, 8, 8, 0, 16, 34, 34, 34 }, |
f63b340d | 96 | { RC_INVALID, WLAN_RC_PHY_HT_40_DS, 54000, /* 54 Mb */ |
6473d24d | 97 | 49800, 9, 9, 2, 17, 35, 35, 35 }, |
f63b340d | 98 | { RC_INVALID, WLAN_RC_PHY_HT_40_DS, 81000, /* 81 Mb */ |
6473d24d | 99 | 71900, 10, 10, 2, 18, 36, 36, 36 }, |
f63b340d | 100 | { RC_HT_D_40, WLAN_RC_PHY_HT_40_DS, 108000, /* 108 Mb */ |
6473d24d | 101 | 92500, 11, 11, 4, 19, 37, 37, 37 }, |
f63b340d | 102 | { RC_HT_D_40, WLAN_RC_PHY_HT_40_DS, 162000, /* 162 Mb */ |
6473d24d | 103 | 130300, 12, 12, 4, 20, 38, 38, 38 }, |
f63b340d | 104 | { RC_HT_D_40, WLAN_RC_PHY_HT_40_DS, 216000, /* 216 Mb */ |
6473d24d | 105 | 162800, 13, 13, 4, 21, 39, 39, 39 }, |
f63b340d | 106 | { RC_HT_D_40, WLAN_RC_PHY_HT_40_DS, 243000, /* 243 Mb */ |
6473d24d | 107 | 178200, 14, 14, 4, 22, 40, 40, 40 }, |
f63b340d | 108 | { RC_HT_D_40, WLAN_RC_PHY_HT_40_DS, 270000, /* 270 Mb */ |
6473d24d | 109 | 192100, 15, 15, 4, 23, 41, 42, 42 }, |
f63b340d | 110 | { RC_HT_D_40, 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 | { |
f63b340d | 124 | { RC_ALL, WLAN_RC_PHY_CCK, 1000, /* 1 Mb */ |
1fe8234a | 125 | 900, 0, 2, 0, 0, 0, 0, 0 }, |
f63b340d | 126 | { RC_ALL, WLAN_RC_PHY_CCK, 2000, /* 2 Mb */ |
1fe8234a | 127 | 1900, 1, 4, 1, 1, 1, 1, 1 }, |
f63b340d | 128 | { RC_ALL, WLAN_RC_PHY_CCK, 5500, /* 5.5 Mb */ |
1fe8234a | 129 | 4900, 2, 11, 2, 2, 2, 2, 2 }, |
f63b340d | 130 | { RC_ALL, WLAN_RC_PHY_CCK, 11000, /* 11 Mb */ |
1fe8234a | 131 | 8100, 3, 22, 3, 3, 3, 3, 3 }, |
f63b340d | 132 | { RC_INVALID, WLAN_RC_PHY_OFDM, 6000, /* 6 Mb */ |
1fe8234a | 133 | 5400, 4, 12, 4, 4, 4, 4, 4 }, |
f63b340d | 134 | { RC_INVALID, WLAN_RC_PHY_OFDM, 9000, /* 9 Mb */ |
1fe8234a | 135 | 7800, 5, 18, 4, 5, 5, 5, 5 }, |
f63b340d | 136 | { RC_L_SD, WLAN_RC_PHY_OFDM, 12000, /* 12 Mb */ |
1fe8234a | 137 | 10100, 6, 24, 6, 6, 6, 6, 6 }, |
f63b340d | 138 | { RC_L_SD, WLAN_RC_PHY_OFDM, 18000, /* 18 Mb */ |
1fe8234a | 139 | 14100, 7, 36, 6, 7, 7, 7, 7 }, |
f63b340d | 140 | { RC_L_SD, WLAN_RC_PHY_OFDM, 24000, /* 24 Mb */ |
1fe8234a | 141 | 17700, 8, 48, 8, 8, 8, 8, 8 }, |
f63b340d | 142 | { RC_L_SD, WLAN_RC_PHY_OFDM, 36000, /* 36 Mb */ |
1fe8234a | 143 | 23700, 9, 72, 8, 9, 9, 9, 9 }, |
f63b340d | 144 | { RC_L_SD, WLAN_RC_PHY_OFDM, 48000, /* 48 Mb */ |
1fe8234a | 145 | 27400, 10, 96, 8, 10, 10, 10, 10 }, |
f63b340d | 146 | { RC_L_SD, WLAN_RC_PHY_OFDM, 54000, /* 54 Mb */ |
1fe8234a | 147 | 30900, 11, 108, 8, 11, 11, 11, 11 }, |
f63b340d | 148 | { RC_INVALID, WLAN_RC_PHY_HT_20_SS, 6500, /* 6.5 Mb */ |
6473d24d | 149 | 6400, 0, 0, 4, 12, 29, 12, 29 }, |
f63b340d | 150 | { RC_HT_SD_20, WLAN_RC_PHY_HT_20_SS, 13000, /* 13 Mb */ |
6473d24d | 151 | 12700, 1, 1, 6, 13, 30, 13, 30 }, |
f63b340d | 152 | { RC_HT_SD_20, WLAN_RC_PHY_HT_20_SS, 19500, /* 19.5 Mb */ |
6473d24d | 153 | 18800, 2, 2, 6, 14, 31, 14, 31 }, |
f63b340d | 154 | { RC_HT_SD_20, WLAN_RC_PHY_HT_20_SS, 26000, /* 26 Mb */ |
6473d24d | 155 | 25000, 3, 3, 8, 15, 32, 15, 32 }, |
f63b340d | 156 | { RC_HT_SD_20, WLAN_RC_PHY_HT_20_SS, 39000, /* 39 Mb */ |
6473d24d | 157 | 36700, 4, 4, 8, 16, 33, 16, 33 }, |
f63b340d | 158 | { RC_HT_S_20, WLAN_RC_PHY_HT_20_SS, 52000, /* 52 Mb */ |
6473d24d | 159 | 48100, 5, 5, 8, 17, 34, 17, 34 }, |
f63b340d | 160 | { RC_HT_S_20, WLAN_RC_PHY_HT_20_SS, 58500, /* 58.5 Mb */ |
6473d24d | 161 | 53500, 6, 6, 8, 18, 35, 18, 35 }, |
f63b340d | 162 | { RC_HT_S_20, WLAN_RC_PHY_HT_20_SS, 65000, /* 65 Mb */ |
6473d24d | 163 | 59000, 7, 7, 8, 19, 36, 19, 37 }, |
f63b340d | 164 | { RC_INVALID, WLAN_RC_PHY_HT_20_DS, 13000, /* 13 Mb */ |
6473d24d | 165 | 12700, 8, 8, 4, 20, 38, 20, 38 }, |
f63b340d | 166 | { RC_INVALID, WLAN_RC_PHY_HT_20_DS, 26000, /* 26 Mb */ |
6473d24d | 167 | 24800, 9, 9, 6, 21, 39, 21, 39 }, |
f63b340d | 168 | { RC_INVALID, WLAN_RC_PHY_HT_20_DS, 39000, /* 39 Mb */ |
6473d24d | 169 | 36600, 10, 10, 6, 22, 40, 22, 40 }, |
f63b340d | 170 | { RC_HT_D_20, WLAN_RC_PHY_HT_20_DS, 52000, /* 52 Mb */ |
6473d24d | 171 | 48100, 11, 11, 8, 23, 41, 23, 41 }, |
f63b340d | 172 | { RC_HT_D_20, WLAN_RC_PHY_HT_20_DS, 78000, /* 78 Mb */ |
6473d24d | 173 | 69500, 12, 12, 8, 24, 42, 24, 42 }, |
f63b340d | 174 | { RC_HT_D_20, WLAN_RC_PHY_HT_20_DS, 104000, /* 104 Mb */ |
6473d24d | 175 | 89500, 13, 13, 8, 25, 43, 25, 43 }, |
f63b340d | 176 | { RC_HT_D_20, WLAN_RC_PHY_HT_20_DS, 117000, /* 117 Mb */ |
6473d24d | 177 | 98900, 14, 14, 8, 26, 44, 26, 44 }, |
f63b340d | 178 | { RC_HT_D_20, WLAN_RC_PHY_HT_20_DS, 130000, /* 130 Mb */ |
6473d24d | 179 | 108300, 15, 15, 8, 27, 45, 28, 46 }, |
f63b340d | 180 | { RC_HT_D_20, WLAN_RC_PHY_HT_20_DS_HGI, 144400, /* 130 Mb */ |
6473d24d | 181 | 120000, 15, 15, 8, 27, 45, 28, 46 }, |
f63b340d | 182 | { RC_HT_SD_40, WLAN_RC_PHY_HT_40_SS, 13500, /* 13.5 Mb */ |
6473d24d | 183 | 13200, 0, 0, 8, 12, 29, 29, 29 }, |
f63b340d | 184 | { RC_HT_SD_40, WLAN_RC_PHY_HT_40_SS, 27500, /* 27.0 Mb */ |
6473d24d | 185 | 25900, 1, 1, 8, 13, 30, 30, 30 }, |
f63b340d | 186 | { RC_HT_SD_40, WLAN_RC_PHY_HT_40_SS, 40500, /* 40.5 Mb */ |
6473d24d | 187 | 38600, 2, 2, 8, 14, 31, 31, 31 }, |
f63b340d | 188 | { RC_HT_SD_40, WLAN_RC_PHY_HT_40_SS, 54000, /* 54 Mb */ |
6473d24d | 189 | 49800, 3, 3, 8, 15, 32, 32, 32 }, |
f63b340d | 190 | { RC_HT_SD_40, WLAN_RC_PHY_HT_40_SS, 81500, /* 81 Mb */ |
6473d24d | 191 | 72200, 4, 4, 8, 16, 33, 33, 33 }, |
f63b340d | 192 | { RC_HT_S_40 , WLAN_RC_PHY_HT_40_SS, 108000, /* 108 Mb */ |
6473d24d | 193 | 92900, 5, 5, 8, 17, 34, 34, 34 }, |
f63b340d | 194 | { RC_HT_S_40, WLAN_RC_PHY_HT_40_SS, 121500, /* 121.5 Mb */ |
6473d24d | 195 | 102700, 6, 6, 8, 18, 35, 35, 35 }, |
f63b340d | 196 | { RC_HT_S_40, WLAN_RC_PHY_HT_40_SS, 135000, /* 135 Mb */ |
6473d24d | 197 | 112000, 7, 7, 8, 19, 36, 37, 37 }, |
f63b340d | 198 | { RC_HT_S_40, WLAN_RC_PHY_HT_40_SS_HGI, 150000, /* 150 Mb */ |
6473d24d | 199 | 122000, 7, 7, 8, 19, 36, 37, 37 }, |
f63b340d | 200 | { RC_INVALID, WLAN_RC_PHY_HT_40_DS, 27000, /* 27 Mb */ |
6473d24d | 201 | 25800, 8, 8, 8, 20, 38, 38, 38 }, |
f63b340d | 202 | { RC_INVALID, WLAN_RC_PHY_HT_40_DS, 54000, /* 54 Mb */ |
6473d24d | 203 | 49800, 9, 9, 8, 21, 39, 39, 39 }, |
f63b340d | 204 | { RC_INVALID, WLAN_RC_PHY_HT_40_DS, 81000, /* 81 Mb */ |
6473d24d | 205 | 71900, 10, 10, 8, 22, 40, 40, 40 }, |
f63b340d | 206 | { RC_HT_D_40, WLAN_RC_PHY_HT_40_DS, 108000, /* 108 Mb */ |
6473d24d | 207 | 92500, 11, 11, 8, 23, 41, 41, 41 }, |
f63b340d | 208 | { RC_HT_D_40, WLAN_RC_PHY_HT_40_DS, 162000, /* 162 Mb */ |
6473d24d | 209 | 130300, 12, 12, 8, 24, 42, 42, 42 }, |
f63b340d | 210 | { RC_HT_D_40, WLAN_RC_PHY_HT_40_DS, 216000, /* 216 Mb */ |
6473d24d | 211 | 162800, 13, 13, 8, 25, 43, 43, 43 }, |
f63b340d | 212 | { RC_HT_D_40, WLAN_RC_PHY_HT_40_DS, 243000, /* 243 Mb */ |
6473d24d | 213 | 178200, 14, 14, 8, 26, 44, 44, 44 }, |
f63b340d | 214 | { RC_HT_D_40, WLAN_RC_PHY_HT_40_DS, 270000, /* 270 Mb */ |
6473d24d | 215 | 192100, 15, 15, 8, 27, 45, 46, 46 }, |
f63b340d | 216 | { RC_HT_D_40, 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 | { |
f63b340d | 227 | { RC_L_SD, WLAN_RC_PHY_OFDM, 6000, /* 6 Mb */ |
1fe8234a | 228 | 5400, 0, 12, 0, 0, 0 }, |
f63b340d | 229 | { RC_L_SD, WLAN_RC_PHY_OFDM, 9000, /* 9 Mb */ |
1fe8234a | 230 | 7800, 1, 18, 0, 1, 0 }, |
f63b340d | 231 | { RC_L_SD, WLAN_RC_PHY_OFDM, 12000, /* 12 Mb */ |
1fe8234a | 232 | 10000, 2, 24, 2, 2, 0 }, |
f63b340d | 233 | { RC_L_SD, WLAN_RC_PHY_OFDM, 18000, /* 18 Mb */ |
1fe8234a | 234 | 13900, 3, 36, 2, 3, 0 }, |
f63b340d | 235 | { RC_L_SD, WLAN_RC_PHY_OFDM, 24000, /* 24 Mb */ |
1fe8234a | 236 | 17300, 4, 48, 4, 4, 0 }, |
f63b340d | 237 | { RC_L_SD, WLAN_RC_PHY_OFDM, 36000, /* 36 Mb */ |
1fe8234a | 238 | 23000, 5, 72, 4, 5, 0 }, |
f63b340d | 239 | { RC_L_SD, WLAN_RC_PHY_OFDM, 48000, /* 48 Mb */ |
1fe8234a | 240 | 27400, 6, 96, 4, 6, 0 }, |
f63b340d | 241 | { RC_L_SD, 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 | { |
f63b340d | 252 | { RC_L_SD, WLAN_RC_PHY_CCK, 1000, /* 1 Mb */ |
1fe8234a | 253 | 900, 0, 2, 0, 0, 0 }, |
f63b340d | 254 | { RC_L_SD, WLAN_RC_PHY_CCK, 2000, /* 2 Mb */ |
1fe8234a | 255 | 1900, 1, 4, 1, 1, 0 }, |
f63b340d | 256 | { RC_L_SD, WLAN_RC_PHY_CCK, 5500, /* 5.5 Mb */ |
1fe8234a | 257 | 4900, 2, 11, 2, 2, 0 }, |
f63b340d | 258 | { RC_L_SD, WLAN_RC_PHY_CCK, 11000, /* 11 Mb */ |
1fe8234a | 259 | 8100, 3, 22, 3, 3, 0 }, |
f63b340d | 260 | { RC_INVALID, WLAN_RC_PHY_OFDM, 6000, /* 6 Mb */ |
1fe8234a | 261 | 5400, 4, 12, 4, 4, 0 }, |
f63b340d | 262 | { RC_INVALID, WLAN_RC_PHY_OFDM, 9000, /* 9 Mb */ |
1fe8234a | 263 | 7800, 5, 18, 4, 5, 0 }, |
f63b340d | 264 | { RC_L_SD, WLAN_RC_PHY_OFDM, 12000, /* 12 Mb */ |
1fe8234a | 265 | 10000, 6, 24, 6, 6, 0 }, |
f63b340d | 266 | { RC_L_SD, WLAN_RC_PHY_OFDM, 18000, /* 18 Mb */ |
1fe8234a | 267 | 13900, 7, 36, 6, 7, 0 }, |
f63b340d | 268 | { RC_L_SD, WLAN_RC_PHY_OFDM, 24000, /* 24 Mb */ |
1fe8234a | 269 | 17300, 8, 48, 8, 8, 0 }, |
f63b340d | 270 | { RC_L_SD, WLAN_RC_PHY_OFDM, 36000, /* 36 Mb */ |
1fe8234a | 271 | 23000, 9, 72, 8, 9, 0 }, |
f63b340d | 272 | { RC_L_SD, WLAN_RC_PHY_OFDM, 48000, /* 48 Mb */ |
1fe8234a | 273 | 27400, 10, 96, 8, 10, 0 }, |
f63b340d | 274 | { RC_L_SD, 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); |
f63b340d | 345 | ath_rc_priv->valid_rate_index[index] = !!valid_tx_rate; |
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 | 406 | u8 i, hi = 0; |
f078f209 | 407 | |
f078f209 | 408 | for (i = 0; i < rate_table->rate_cnt; i++) { |
f63b340d | 409 | if (rate_table->info[i].rate_flags & RC_LEGACY) { |
f078f209 LR |
410 | u32 phy = rate_table->info[i].phy; |
411 | u8 valid_rate_count = 0; | |
412 | ||
46d14a58 | 413 | if (!ath_rc_valid_phyrate(phy, capflag, 0)) |
f078f209 LR |
414 | continue; |
415 | ||
256b7759 | 416 | valid_rate_count = ath_rc_priv->valid_phy_ratecnt[phy]; |
f078f209 | 417 | |
256b7759 S |
418 | ath_rc_priv->valid_phy_rateidx[phy][valid_rate_count] = i; |
419 | ath_rc_priv->valid_phy_ratecnt[phy] += 1; | |
46d14a58 | 420 | ath_rc_set_valid_txmask(ath_rc_priv, i, 1); |
f63b340d | 421 | hi = i; |
f078f209 LR |
422 | } |
423 | } | |
2c5a744d | 424 | |
f078f209 LR |
425 | return hi; |
426 | } | |
427 | ||
2c5a744d | 428 | static u8 ath_rc_setvalid_rates(struct ath_rate_priv *ath_rc_priv, |
4f0fc7c3 | 429 | const struct ath_rate_table *rate_table, |
2c5a744d S |
430 | struct ath_rateset *rateset, |
431 | u32 capflag) | |
f078f209 | 432 | { |
f078f209 | 433 | u8 i, j, hi = 0; |
f078f209 LR |
434 | |
435 | /* Use intersection of working rates and valid rates */ | |
436 | for (i = 0; i < rateset->rs_nrates; i++) { | |
437 | for (j = 0; j < rate_table->rate_cnt; j++) { | |
438 | u32 phy = rate_table->info[j].phy; | |
f63b340d | 439 | u16 rate_flags = rate_table->info[i].rate_flags; |
2c5a744d S |
440 | u8 rate = rateset->rs_rates[i]; |
441 | u8 dot11rate = rate_table->info[j].dot11rate; | |
f078f209 LR |
442 | |
443 | /* We allow a rate only if its valid and the | |
444 | * capflag matches one of the validity | |
46d14a58 | 445 | * (VALID/VALID_20/VALID_40) flags */ |
f078f209 | 446 | |
545750d3 | 447 | if ((rate == dot11rate) && |
f63b340d SB |
448 | (rate_flags & WLAN_RC_CAP_MODE(capflag)) == |
449 | WLAN_RC_CAP_MODE(capflag) && | |
450 | (rate_flags & WLAN_RC_CAP_STREAM(capflag)) && | |
2c5a744d | 451 | !WLAN_RC_PHY_HT(phy)) { |
f078f209 LR |
452 | u8 valid_rate_count = 0; |
453 | ||
46d14a58 | 454 | if (!ath_rc_valid_phyrate(phy, capflag, 0)) |
f078f209 LR |
455 | continue; |
456 | ||
457 | valid_rate_count = | |
256b7759 | 458 | ath_rc_priv->valid_phy_ratecnt[phy]; |
f078f209 | 459 | |
256b7759 | 460 | ath_rc_priv->valid_phy_rateidx[phy] |
f078f209 | 461 | [valid_rate_count] = j; |
256b7759 | 462 | ath_rc_priv->valid_phy_ratecnt[phy] += 1; |
46d14a58 | 463 | ath_rc_set_valid_txmask(ath_rc_priv, j, 1); |
f078f209 LR |
464 | hi = A_MAX(hi, j); |
465 | } | |
466 | } | |
467 | } | |
2c5a744d | 468 | |
f078f209 LR |
469 | return hi; |
470 | } | |
471 | ||
2c5a744d | 472 | static u8 ath_rc_setvalid_htrates(struct ath_rate_priv *ath_rc_priv, |
4f0fc7c3 | 473 | const struct ath_rate_table *rate_table, |
2c5a744d | 474 | u8 *mcs_set, u32 capflag) |
f078f209 | 475 | { |
2c5a744d S |
476 | struct ath_rateset *rateset = (struct ath_rateset *)mcs_set; |
477 | ||
f078f209 | 478 | u8 i, j, hi = 0; |
f078f209 LR |
479 | |
480 | /* Use intersection of working rates and valid rates */ | |
2c5a744d | 481 | for (i = 0; i < rateset->rs_nrates; i++) { |
f078f209 LR |
482 | for (j = 0; j < rate_table->rate_cnt; j++) { |
483 | u32 phy = rate_table->info[j].phy; | |
f63b340d | 484 | u16 rate_flags = rate_table->info[j].rate_flags; |
2c5a744d S |
485 | u8 rate = rateset->rs_rates[i]; |
486 | u8 dot11rate = rate_table->info[j].dot11rate; | |
f078f209 | 487 | |
545750d3 | 488 | if ((rate != dot11rate) || !WLAN_RC_PHY_HT(phy) || |
f63b340d SB |
489 | !(rate_flags & WLAN_RC_CAP_STREAM(capflag)) || |
490 | !WLAN_RC_PHY_HT_VALID(rate_flags, capflag)) | |
f078f209 LR |
491 | continue; |
492 | ||
46d14a58 | 493 | if (!ath_rc_valid_phyrate(phy, capflag, 0)) |
f078f209 LR |
494 | continue; |
495 | ||
256b7759 S |
496 | ath_rc_priv->valid_phy_rateidx[phy] |
497 | [ath_rc_priv->valid_phy_ratecnt[phy]] = j; | |
498 | ath_rc_priv->valid_phy_ratecnt[phy] += 1; | |
46d14a58 | 499 | ath_rc_set_valid_txmask(ath_rc_priv, j, 1); |
f078f209 LR |
500 | hi = A_MAX(hi, j); |
501 | } | |
502 | } | |
f078f209 | 503 | |
2c5a744d | 504 | return hi; |
f078f209 LR |
505 | } |
506 | ||
201c3b41 LR |
507 | /* Finds the highest rate index we can use */ |
508 | static u8 ath_rc_get_highest_rix(struct ath_softc *sc, | |
509 | struct ath_rate_priv *ath_rc_priv, | |
510 | const struct ath_rate_table *rate_table, | |
511 | int *is_probing) | |
f078f209 | 512 | { |
39a4cafe | 513 | u32 best_thruput, this_thruput, now_msec; |
f078f209 | 514 | u8 rate, next_rate, best_rate, maxindex, minindex; |
39a4cafe | 515 | int8_t index = 0; |
f078f209 LR |
516 | |
517 | now_msec = jiffies_to_msecs(jiffies); | |
39a4cafe | 518 | *is_probing = 0; |
f078f209 | 519 | best_thruput = 0; |
256b7759 | 520 | maxindex = ath_rc_priv->max_valid_rate-1; |
f078f209 LR |
521 | minindex = 0; |
522 | best_rate = minindex; | |
523 | ||
524 | /* | |
525 | * Try the higher rate first. It will reduce memory moving time | |
526 | * if we have very good channel characteristics. | |
527 | */ | |
528 | for (index = maxindex; index >= minindex ; index--) { | |
529 | u8 per_thres; | |
530 | ||
256b7759 S |
531 | rate = ath_rc_priv->valid_rate_index[index]; |
532 | if (rate > ath_rc_priv->rate_max_phy) | |
f078f209 LR |
533 | continue; |
534 | ||
535 | /* | |
536 | * For TCP the average collision rate is around 11%, | |
537 | * so we ignore PERs less than this. This is to | |
538 | * prevent the rate we are currently using (whose | |
539 | * PER might be in the 10-15 range because of TCP | |
540 | * collisions) looking worse than the next lower | |
541 | * rate whose PER has decayed close to 0. If we | |
542 | * used to next lower rate, its PER would grow to | |
543 | * 10-15 and we would be worse off then staying | |
544 | * at the current rate. | |
545 | */ | |
922bac60 | 546 | per_thres = ath_rc_priv->per[rate]; |
f078f209 LR |
547 | if (per_thres < 12) |
548 | per_thres = 12; | |
549 | ||
550 | this_thruput = rate_table->info[rate].user_ratekbps * | |
551 | (100 - per_thres); | |
552 | ||
553 | if (best_thruput <= this_thruput) { | |
554 | best_thruput = this_thruput; | |
555 | best_rate = rate; | |
556 | } | |
557 | } | |
558 | ||
559 | rate = best_rate; | |
f078f209 LR |
560 | |
561 | /* | |
562 | * Must check the actual rate (ratekbps) to account for | |
563 | * non-monoticity of 11g's rate table | |
564 | */ | |
565 | ||
3900898c | 566 | if (rate >= ath_rc_priv->rate_max_phy) { |
256b7759 | 567 | rate = ath_rc_priv->rate_max_phy; |
f078f209 LR |
568 | |
569 | /* Probe the next allowed phy state */ | |
f078f209 | 570 | if (ath_rc_get_nextvalid_txrate(rate_table, |
3900898c | 571 | ath_rc_priv, rate, &next_rate) && |
256b7759 | 572 | (now_msec - ath_rc_priv->probe_time > |
f078f209 | 573 | rate_table->probe_interval) && |
256b7759 | 574 | (ath_rc_priv->hw_maxretry_pktcnt >= 1)) { |
f078f209 | 575 | rate = next_rate; |
256b7759 S |
576 | ath_rc_priv->probe_rate = rate; |
577 | ath_rc_priv->probe_time = now_msec; | |
578 | ath_rc_priv->hw_maxretry_pktcnt = 0; | |
46d14a58 | 579 | *is_probing = 1; |
f078f209 LR |
580 | } |
581 | } | |
582 | ||
256b7759 S |
583 | if (rate > (ath_rc_priv->rate_table_size - 1)) |
584 | rate = ath_rc_priv->rate_table_size - 1; | |
f078f209 | 585 | |
f63b340d | 586 | if (rate_table->info[rate].rate_flags & RC_DS && |
e43419f9 LR |
587 | (ath_rc_priv->ht_cap & WLAN_RC_DS_FLAG)) |
588 | return rate; | |
589 | ||
f63b340d | 590 | if (RC_SS_OR_LEGACY(rate_table->info[rate].rate_flags)) |
e43419f9 LR |
591 | return rate; |
592 | ||
593 | /* This should not happen */ | |
594 | WARN_ON(1); | |
595 | ||
596 | rate = ath_rc_priv->valid_rate_index[0]; | |
f078f209 LR |
597 | |
598 | return rate; | |
599 | } | |
600 | ||
4f0fc7c3 | 601 | static void ath_rc_rate_set_series(const struct ath_rate_table *rate_table, |
a8efee4f | 602 | struct ieee80211_tx_rate *rate, |
c89424df | 603 | struct ieee80211_tx_rate_control *txrc, |
2c5a744d | 604 | u8 tries, u8 rix, int rtsctsenable) |
f078f209 | 605 | { |
a8efee4f | 606 | rate->count = tries; |
545750d3 | 607 | rate->idx = rate_table->info[rix].ratecode; |
a8efee4f | 608 | |
c89424df S |
609 | if (txrc->short_preamble) |
610 | rate->flags |= IEEE80211_TX_RC_USE_SHORT_PREAMBLE; | |
611 | if (txrc->rts || rtsctsenable) | |
a8efee4f | 612 | rate->flags |= IEEE80211_TX_RC_USE_RTS_CTS; |
545750d3 FF |
613 | |
614 | if (WLAN_RC_PHY_HT(rate_table->info[rix].phy)) { | |
a8efee4f | 615 | rate->flags |= IEEE80211_TX_RC_MCS; |
545750d3 FF |
616 | if (WLAN_RC_PHY_40(rate_table->info[rix].phy)) |
617 | rate->flags |= IEEE80211_TX_RC_40_MHZ_WIDTH; | |
618 | if (WLAN_RC_PHY_SGI(rate_table->info[rix].phy)) | |
619 | rate->flags |= IEEE80211_TX_RC_SHORT_GI; | |
620 | } | |
f078f209 LR |
621 | } |
622 | ||
c89424df | 623 | static void ath_rc_rate_set_rtscts(struct ath_softc *sc, |
4f0fc7c3 | 624 | const struct ath_rate_table *rate_table, |
c89424df S |
625 | struct ieee80211_tx_info *tx_info) |
626 | { | |
627 | struct ieee80211_tx_rate *rates = tx_info->control.rates; | |
628 | int i = 0, rix = 0, cix, enable_g_protection = 0; | |
629 | ||
630 | /* get the cix for the lowest valid rix */ | |
631 | for (i = 3; i >= 0; i--) { | |
632 | if (rates[i].count && (rates[i].idx >= 0)) { | |
545750d3 | 633 | rix = ath_rc_get_rateindex(rate_table, &rates[i]); |
c89424df S |
634 | break; |
635 | } | |
636 | } | |
637 | cix = rate_table->info[rix].ctrl_rate; | |
638 | ||
639 | /* All protection frames are transmited at 2Mb/s for 802.11g, | |
640 | * otherwise we transmit them at 1Mb/s */ | |
641 | if (sc->hw->conf.channel->band == IEEE80211_BAND_2GHZ && | |
642 | !conf_is_ht(&sc->hw->conf)) | |
643 | enable_g_protection = 1; | |
644 | ||
645 | /* | |
646 | * If 802.11g protection is enabled, determine whether to use RTS/CTS or | |
647 | * just CTS. Note that this is only done for OFDM/HT unicast frames. | |
648 | */ | |
649 | if ((sc->sc_flags & SC_OP_PROTECT_ENABLE) && | |
c89424df S |
650 | (rate_table->info[rix].phy == WLAN_RC_PHY_OFDM || |
651 | WLAN_RC_PHY_HT(rate_table->info[rix].phy))) { | |
652 | rates[0].flags |= IEEE80211_TX_RC_USE_CTS_PROTECT; | |
653 | cix = rate_table->info[enable_g_protection].ctrl_rate; | |
654 | } | |
655 | ||
656 | tx_info->control.rts_cts_rate_idx = cix; | |
657 | } | |
658 | ||
e25739a1 LR |
659 | static void ath_get_rate(void *priv, struct ieee80211_sta *sta, void *priv_sta, |
660 | struct ieee80211_tx_rate_control *txrc) | |
f078f209 | 661 | { |
e25739a1 LR |
662 | struct ath_softc *sc = priv; |
663 | struct ath_rate_priv *ath_rc_priv = priv_sta; | |
4f0fc7c3 | 664 | const struct ath_rate_table *rate_table; |
3900898c S |
665 | struct sk_buff *skb = txrc->skb; |
666 | struct ieee80211_tx_info *tx_info = IEEE80211_SKB_CB(skb); | |
a8efee4f | 667 | struct ieee80211_tx_rate *rates = tx_info->control.rates; |
c89424df S |
668 | struct ieee80211_hdr *hdr = (struct ieee80211_hdr *)skb->data; |
669 | __le16 fc = hdr->frame_control; | |
5c0ba62f | 670 | u8 try_per_rate, i = 0, rix; |
3900898c | 671 | int is_probe = 0; |
f078f209 | 672 | |
e25739a1 LR |
673 | if (rate_control_send_low(sta, priv_sta, txrc)) |
674 | return; | |
675 | ||
dd190183 LR |
676 | /* |
677 | * For Multi Rate Retry we use a different number of | |
678 | * retry attempt counts. This ends up looking like this: | |
679 | * | |
65896510 FF |
680 | * MRR[0] = 4 |
681 | * MRR[1] = 4 | |
682 | * MRR[2] = 4 | |
683 | * MRR[3] = 8 | |
dd190183 LR |
684 | * |
685 | */ | |
65896510 | 686 | try_per_rate = 4; |
dd190183 | 687 | |
40990ec0 | 688 | rate_table = sc->cur_rate_table; |
201c3b41 | 689 | rix = ath_rc_get_highest_rix(sc, ath_rc_priv, rate_table, &is_probe); |
f078f209 | 690 | |
b0a33448 LR |
691 | /* |
692 | * If we're in HT mode and both us and our peer supports LDPC. | |
693 | * We don't need to check our own device's capabilities as our own | |
694 | * ht capabilities would have already been intersected with our peer's. | |
695 | */ | |
696 | if (conf_is_ht(&sc->hw->conf) && | |
697 | (sta->ht_cap.cap & IEEE80211_HT_CAP_LDPC_CODING)) | |
698 | tx_info->flags |= IEEE80211_TX_CTL_LDPC; | |
699 | ||
58b5190e FF |
700 | if (conf_is_ht(&sc->hw->conf) && |
701 | (sta->ht_cap.cap & IEEE80211_HT_CAP_TX_STBC)) | |
702 | tx_info->flags |= (1 << IEEE80211_TX_CTL_STBC_SHIFT); | |
703 | ||
3900898c | 704 | if (is_probe) { |
f078f209 LR |
705 | /* set one try for probe rates. For the |
706 | * probes don't enable rts */ | |
c89424df | 707 | ath_rc_rate_set_series(rate_table, &rates[i++], txrc, |
5c0ba62f | 708 | 1, rix, 0); |
f078f209 | 709 | |
f078f209 LR |
710 | /* Get the next tried/allowed rate. No RTS for the next series |
711 | * after the probe rate | |
712 | */ | |
5c0ba62f | 713 | ath_rc_get_lower_rix(rate_table, ath_rc_priv, rix, &rix); |
c89424df | 714 | ath_rc_rate_set_series(rate_table, &rates[i++], txrc, |
5c0ba62f | 715 | try_per_rate, rix, 0); |
14587ce2 VT |
716 | |
717 | tx_info->flags |= IEEE80211_TX_CTL_RATE_CTRL_PROBE; | |
f078f209 | 718 | } else { |
f078f209 | 719 | /* Set the choosen rate. No RTS for first series entry. */ |
c89424df | 720 | ath_rc_rate_set_series(rate_table, &rates[i++], txrc, |
5c0ba62f | 721 | try_per_rate, rix, 0); |
f078f209 LR |
722 | } |
723 | ||
724 | /* Fill in the other rates for multirate retry */ | |
3900898c | 725 | for ( ; i < 4; i++) { |
dd190183 LR |
726 | /* Use twice the number of tries for the last MRR segment. */ |
727 | if (i + 1 == 4) | |
65896510 | 728 | try_per_rate = 8; |
dd190183 | 729 | |
5c0ba62f | 730 | ath_rc_get_lower_rix(rate_table, ath_rc_priv, rix, &rix); |
f078f209 | 731 | /* All other rates in the series have RTS enabled */ |
c89424df | 732 | ath_rc_rate_set_series(rate_table, &rates[i], txrc, |
5c0ba62f | 733 | try_per_rate, rix, 1); |
f078f209 LR |
734 | } |
735 | ||
736 | /* | |
737 | * NB:Change rate series to enable aggregation when operating | |
738 | * at lower MCS rates. When first rate in series is MCS2 | |
739 | * in HT40 @ 2.4GHz, series should look like: | |
740 | * | |
741 | * {MCS2, MCS1, MCS0, MCS0}. | |
742 | * | |
743 | * When first rate in series is MCS3 in HT20 @ 2.4GHz, series should | |
744 | * look like: | |
745 | * | |
746 | * {MCS3, MCS2, MCS1, MCS1} | |
747 | * | |
748 | * So, set fourth rate in series to be same as third one for | |
749 | * above conditions. | |
750 | */ | |
3706de6f | 751 | if ((sc->hw->conf.channel->band == IEEE80211_BAND_2GHZ) && |
ecf70441 | 752 | (conf_is_ht(&sc->hw->conf))) { |
40990ec0 | 753 | u8 dot11rate = rate_table->info[rix].dot11rate; |
f078f209 LR |
754 | u8 phy = rate_table->info[rix].phy; |
755 | if (i == 4 && | |
756 | ((dot11rate == 2 && phy == WLAN_RC_PHY_HT_40_SS) || | |
dc2222a8 | 757 | (dot11rate == 3 && phy == WLAN_RC_PHY_HT_20_SS))) { |
a8efee4f S |
758 | rates[3].idx = rates[2].idx; |
759 | rates[3].flags = rates[2].flags; | |
f078f209 LR |
760 | } |
761 | } | |
c89424df S |
762 | |
763 | /* | |
764 | * Force hardware to use computed duration for next | |
765 | * fragment by disabling multi-rate retry, which | |
766 | * updates duration based on the multi-rate duration table. | |
767 | * | |
768 | * FIXME: Fix duration | |
769 | */ | |
7682a76d LR |
770 | if (ieee80211_has_morefrags(fc) || |
771 | (le16_to_cpu(hdr->seq_ctrl) & IEEE80211_SCTL_FRAG)) { | |
c89424df S |
772 | rates[1].count = rates[2].count = rates[3].count = 0; |
773 | rates[1].idx = rates[2].idx = rates[3].idx = 0; | |
774 | rates[0].count = ATH_TXMAXTRY; | |
775 | } | |
776 | ||
777 | /* Setup RTS/CTS */ | |
778 | ath_rc_rate_set_rtscts(sc, rate_table, tx_info); | |
f078f209 LR |
779 | } |
780 | ||
2c5a744d | 781 | static bool ath_rc_update_per(struct ath_softc *sc, |
4f0fc7c3 | 782 | const struct ath_rate_table *rate_table, |
2c5a744d | 783 | struct ath_rate_priv *ath_rc_priv, |
827e69bf | 784 | struct ieee80211_tx_info *tx_info, |
2c5a744d S |
785 | int tx_rate, int xretries, int retries, |
786 | u32 now_msec) | |
f078f209 | 787 | { |
2c5a744d | 788 | bool state_change = false; |
827e69bf | 789 | int count, n_bad_frames; |
f078f209 | 790 | u8 last_per; |
f078f209 LR |
791 | static u32 nretry_to_per_lookup[10] = { |
792 | 100 * 0 / 1, | |
793 | 100 * 1 / 4, | |
794 | 100 * 1 / 2, | |
795 | 100 * 3 / 4, | |
796 | 100 * 4 / 5, | |
797 | 100 * 5 / 6, | |
798 | 100 * 6 / 7, | |
799 | 100 * 7 / 8, | |
800 | 100 * 8 / 9, | |
801 | 100 * 9 / 10 | |
802 | }; | |
803 | ||
922bac60 | 804 | last_per = ath_rc_priv->per[tx_rate]; |
827e69bf | 805 | n_bad_frames = tx_info->status.ampdu_len - tx_info->status.ampdu_ack_len; |
f078f209 LR |
806 | |
807 | if (xretries) { | |
f078f209 | 808 | if (xretries == 1) { |
922bac60 VT |
809 | ath_rc_priv->per[tx_rate] += 30; |
810 | if (ath_rc_priv->per[tx_rate] > 100) | |
811 | ath_rc_priv->per[tx_rate] = 100; | |
f078f209 LR |
812 | } else { |
813 | /* xretries == 2 */ | |
87c1687d | 814 | count = ARRAY_SIZE(nretry_to_per_lookup); |
f078f209 LR |
815 | if (retries >= count) |
816 | retries = count - 1; | |
2c5a744d | 817 | |
f078f209 | 818 | /* new_PER = 7/8*old_PER + 1/8*(currentPER) */ |
922bac60 | 819 | ath_rc_priv->per[tx_rate] = |
2c5a744d | 820 | (u8)(last_per - (last_per >> 3) + (100 >> 3)); |
f078f209 LR |
821 | } |
822 | ||
823 | /* xretries == 1 or 2 */ | |
824 | ||
256b7759 S |
825 | if (ath_rc_priv->probe_rate == tx_rate) |
826 | ath_rc_priv->probe_rate = 0; | |
f078f209 | 827 | |
2c5a744d | 828 | } else { /* xretries == 0 */ |
87c1687d | 829 | count = ARRAY_SIZE(nretry_to_per_lookup); |
f078f209 LR |
830 | if (retries >= count) |
831 | retries = count - 1; | |
2c5a744d | 832 | |
827e69bf | 833 | if (n_bad_frames) { |
dc2222a8 | 834 | /* new_PER = 7/8*old_PER + 1/8*(currentPER) |
f078f209 LR |
835 | * Assuming that n_frames is not 0. The current PER |
836 | * from the retries is 100 * retries / (retries+1), | |
837 | * since the first retries attempts failed, and the | |
838 | * next one worked. For the one that worked, | |
839 | * n_bad_frames subframes out of n_frames wored, | |
840 | * so the PER for that part is | |
841 | * 100 * n_bad_frames / n_frames, and it contributes | |
842 | * 100 * n_bad_frames / (n_frames * (retries+1)) to | |
843 | * the above PER. The expression below is a | |
844 | * simplified version of the sum of these two terms. | |
845 | */ | |
827e69bf FF |
846 | if (tx_info->status.ampdu_len > 0) { |
847 | int n_frames, n_bad_tries; | |
2c5a744d S |
848 | u8 cur_per, new_per; |
849 | ||
827e69bf FF |
850 | n_bad_tries = retries * tx_info->status.ampdu_len + |
851 | n_bad_frames; | |
852 | n_frames = tx_info->status.ampdu_len * (retries + 1); | |
853 | cur_per = (100 * n_bad_tries / n_frames) >> 3; | |
2c5a744d | 854 | new_per = (u8)(last_per - (last_per >> 3) + cur_per); |
922bac60 | 855 | ath_rc_priv->per[tx_rate] = new_per; |
2c5a744d | 856 | } |
f078f209 | 857 | } else { |
922bac60 | 858 | ath_rc_priv->per[tx_rate] = |
2c5a744d S |
859 | (u8)(last_per - (last_per >> 3) + |
860 | (nretry_to_per_lookup[retries] >> 3)); | |
f078f209 LR |
861 | } |
862 | ||
f078f209 LR |
863 | |
864 | /* | |
865 | * If we got at most one retry then increase the max rate if | |
866 | * this was a probe. Otherwise, ignore the probe. | |
867 | */ | |
256b7759 | 868 | if (ath_rc_priv->probe_rate && ath_rc_priv->probe_rate == tx_rate) { |
827e69bf | 869 | if (retries > 0 || 2 * n_bad_frames > tx_info->status.ampdu_len) { |
f078f209 LR |
870 | /* |
871 | * Since we probed with just a single attempt, | |
872 | * any retries means the probe failed. Also, | |
873 | * if the attempt worked, but more than half | |
874 | * the subframes were bad then also consider | |
875 | * the probe a failure. | |
876 | */ | |
256b7759 | 877 | ath_rc_priv->probe_rate = 0; |
f078f209 LR |
878 | } else { |
879 | u8 probe_rate = 0; | |
880 | ||
2c5a744d S |
881 | ath_rc_priv->rate_max_phy = |
882 | ath_rc_priv->probe_rate; | |
256b7759 | 883 | probe_rate = ath_rc_priv->probe_rate; |
f078f209 | 884 | |
922bac60 VT |
885 | if (ath_rc_priv->per[probe_rate] > 30) |
886 | ath_rc_priv->per[probe_rate] = 20; | |
f078f209 | 887 | |
256b7759 | 888 | ath_rc_priv->probe_rate = 0; |
f078f209 LR |
889 | |
890 | /* | |
891 | * Since this probe succeeded, we allow the next | |
892 | * probe twice as soon. This allows the maxRate | |
893 | * to move up faster if the probes are | |
af901ca1 | 894 | * successful. |
f078f209 | 895 | */ |
2c5a744d S |
896 | ath_rc_priv->probe_time = |
897 | now_msec - rate_table->probe_interval / 2; | |
f078f209 LR |
898 | } |
899 | } | |
900 | ||
901 | if (retries > 0) { | |
902 | /* | |
903 | * Don't update anything. We don't know if | |
904 | * this was because of collisions or poor signal. | |
f078f209 | 905 | */ |
256b7759 | 906 | ath_rc_priv->hw_maxretry_pktcnt = 0; |
f078f209 LR |
907 | } else { |
908 | /* | |
909 | * It worked with no retries. First ignore bogus (small) | |
910 | * rssi_ack values. | |
911 | */ | |
256b7759 S |
912 | if (tx_rate == ath_rc_priv->rate_max_phy && |
913 | ath_rc_priv->hw_maxretry_pktcnt < 255) { | |
914 | ath_rc_priv->hw_maxretry_pktcnt++; | |
f078f209 LR |
915 | } |
916 | ||
f078f209 LR |
917 | } |
918 | } | |
39a4cafe | 919 | |
2c5a744d S |
920 | return state_change; |
921 | } | |
922 | ||
923 | /* Update PER, RSSI and whatever else that the code thinks it is doing. | |
924 | If you can make sense of all this, you really need to go out more. */ | |
925 | ||
926 | static void ath_rc_update_ht(struct ath_softc *sc, | |
927 | struct ath_rate_priv *ath_rc_priv, | |
827e69bf | 928 | struct ieee80211_tx_info *tx_info, |
2c5a744d S |
929 | int tx_rate, int xretries, int retries) |
930 | { | |
2c5a744d S |
931 | u32 now_msec = jiffies_to_msecs(jiffies); |
932 | int rate; | |
933 | u8 last_per; | |
934 | bool state_change = false; | |
4f0fc7c3 | 935 | const struct ath_rate_table *rate_table = sc->cur_rate_table; |
2c5a744d S |
936 | int size = ath_rc_priv->rate_table_size; |
937 | ||
938 | if ((tx_rate < 0) || (tx_rate > rate_table->rate_cnt)) | |
939 | return; | |
f078f209 | 940 | |
922bac60 | 941 | last_per = ath_rc_priv->per[tx_rate]; |
2c5a744d S |
942 | |
943 | /* Update PER first */ | |
944 | state_change = ath_rc_update_per(sc, rate_table, ath_rc_priv, | |
827e69bf | 945 | tx_info, tx_rate, xretries, |
2c5a744d | 946 | retries, now_msec); |
f078f209 LR |
947 | |
948 | /* | |
949 | * If this rate looks bad (high PER) then stop using it for | |
950 | * a while (except if we are probing). | |
951 | */ | |
922bac60 | 952 | if (ath_rc_priv->per[tx_rate] >= 55 && tx_rate > 0 && |
dc2222a8 | 953 | rate_table->info[tx_rate].ratekbps <= |
256b7759 | 954 | rate_table->info[ath_rc_priv->rate_max_phy].ratekbps) { |
39448b0a LR |
955 | ath_rc_get_lower_rix(rate_table, ath_rc_priv, |
956 | (u8)tx_rate, &ath_rc_priv->rate_max_phy); | |
f078f209 LR |
957 | |
958 | /* Don't probe for a little while. */ | |
256b7759 | 959 | ath_rc_priv->probe_time = now_msec; |
f078f209 LR |
960 | } |
961 | ||
f078f209 LR |
962 | /* Make sure the rates below this have lower PER */ |
963 | /* Monotonicity is kept only for rates below the current rate. */ | |
922bac60 | 964 | if (ath_rc_priv->per[tx_rate] < last_per) { |
f078f209 | 965 | for (rate = tx_rate - 1; rate >= 0; rate--) { |
f078f209 | 966 | |
922bac60 VT |
967 | if (ath_rc_priv->per[rate] > |
968 | ath_rc_priv->per[rate+1]) { | |
969 | ath_rc_priv->per[rate] = | |
970 | ath_rc_priv->per[rate+1]; | |
f078f209 LR |
971 | } |
972 | } | |
973 | } | |
974 | ||
975 | /* Maintain monotonicity for rates above the current rate */ | |
2c5a744d | 976 | for (rate = tx_rate; rate < size - 1; rate++) { |
922bac60 VT |
977 | if (ath_rc_priv->per[rate+1] < |
978 | ath_rc_priv->per[rate]) | |
979 | ath_rc_priv->per[rate+1] = | |
980 | ath_rc_priv->per[rate]; | |
f078f209 LR |
981 | } |
982 | ||
f078f209 LR |
983 | /* Every so often, we reduce the thresholds |
984 | * and PER (different for CCK and OFDM). */ | |
256b7759 | 985 | if (now_msec - ath_rc_priv->per_down_time >= |
c4130465 | 986 | rate_table->probe_interval) { |
2c5a744d | 987 | for (rate = 0; rate < size; rate++) { |
922bac60 VT |
988 | ath_rc_priv->per[rate] = |
989 | 7 * ath_rc_priv->per[rate] / 8; | |
f078f209 LR |
990 | } |
991 | ||
256b7759 | 992 | ath_rc_priv->per_down_time = now_msec; |
f078f209 | 993 | } |
2c5a744d | 994 | |
9e712790 | 995 | ath_debug_stat_retries(sc, tx_rate, xretries, retries, |
922bac60 | 996 | ath_rc_priv->per[tx_rate]); |
029bc432 | 997 | |
2c5a744d S |
998 | } |
999 | ||
4f0fc7c3 | 1000 | static int ath_rc_get_rateindex(const struct ath_rate_table *rate_table, |
2c5a744d S |
1001 | struct ieee80211_tx_rate *rate) |
1002 | { | |
1003 | int rix; | |
1004 | ||
545750d3 FF |
1005 | if (!(rate->flags & IEEE80211_TX_RC_MCS)) |
1006 | return rate->idx; | |
1007 | ||
1008 | rix = rate->idx + rate_table->mcs_start; | |
2c5a744d S |
1009 | if ((rate->flags & IEEE80211_TX_RC_40_MHZ_WIDTH) && |
1010 | (rate->flags & IEEE80211_TX_RC_SHORT_GI)) | |
545750d3 | 1011 | rix = rate_table->info[rix].ht_index; |
2c5a744d | 1012 | else if (rate->flags & IEEE80211_TX_RC_SHORT_GI) |
545750d3 | 1013 | rix = rate_table->info[rix].sgi_index; |
2c5a744d | 1014 | else if (rate->flags & IEEE80211_TX_RC_40_MHZ_WIDTH) |
545750d3 | 1015 | rix = rate_table->info[rix].cw40index; |
2c5a744d | 1016 | else |
545750d3 | 1017 | rix = rate_table->info[rix].base_index; |
2c5a744d S |
1018 | |
1019 | return rix; | |
f078f209 LR |
1020 | } |
1021 | ||
46d14a58 S |
1022 | static void ath_rc_tx_status(struct ath_softc *sc, |
1023 | struct ath_rate_priv *ath_rc_priv, | |
1024 | struct ieee80211_tx_info *tx_info, | |
1025 | int final_ts_idx, int xretries, int long_retry) | |
f078f209 | 1026 | { |
4f0fc7c3 | 1027 | const struct ath_rate_table *rate_table; |
a8efee4f | 1028 | struct ieee80211_tx_rate *rates = tx_info->status.rates; |
f078f209 | 1029 | u8 flags; |
2c5a744d | 1030 | u32 i = 0, rix; |
f078f209 | 1031 | |
40990ec0 | 1032 | rate_table = sc->cur_rate_table; |
f078f209 LR |
1033 | |
1034 | /* | |
1035 | * If the first rate is not the final index, there | |
1036 | * are intermediate rate failures to be processed. | |
1037 | */ | |
1038 | if (final_ts_idx != 0) { | |
1039 | /* Process intermediate rates that failed.*/ | |
2c5a744d S |
1040 | for (i = 0; i < final_ts_idx ; i++) { |
1041 | if (rates[i].count != 0 && (rates[i].idx >= 0)) { | |
1042 | flags = rates[i].flags; | |
1043 | ||
f078f209 LR |
1044 | /* If HT40 and we have switched mode from |
1045 | * 40 to 20 => don't update */ | |
2c5a744d | 1046 | |
a8efee4f | 1047 | if ((flags & IEEE80211_TX_RC_40_MHZ_WIDTH) && |
f5c38ef0 | 1048 | !(ath_rc_priv->ht_cap & WLAN_RC_40_FLAG)) |
f078f209 | 1049 | return; |
e63835b0 | 1050 | |
2c5a744d | 1051 | rix = ath_rc_get_rateindex(rate_table, &rates[i]); |
827e69bf FF |
1052 | ath_rc_update_ht(sc, ath_rc_priv, tx_info, |
1053 | rix, xretries ? 1 : 2, | |
2c5a744d | 1054 | rates[i].count); |
f078f209 LR |
1055 | } |
1056 | } | |
1057 | } else { | |
1058 | /* | |
1059 | * Handle the special case of MIMO PS burst, where the second | |
1060 | * aggregate is sent out with only one rate and one try. | |
1061 | * Treating it as an excessive retry penalizes the rate | |
1062 | * inordinately. | |
1063 | */ | |
a8efee4f | 1064 | if (rates[0].count == 1 && xretries == 1) |
f078f209 LR |
1065 | xretries = 2; |
1066 | } | |
1067 | ||
2c5a744d S |
1068 | flags = rates[i].flags; |
1069 | ||
f078f209 | 1070 | /* If HT40 and we have switched mode from 40 to 20 => don't update */ |
a8efee4f | 1071 | if ((flags & IEEE80211_TX_RC_40_MHZ_WIDTH) && |
f5c38ef0 | 1072 | !(ath_rc_priv->ht_cap & WLAN_RC_40_FLAG)) |
f078f209 LR |
1073 | return; |
1074 | ||
2c5a744d | 1075 | rix = ath_rc_get_rateindex(rate_table, &rates[i]); |
827e69bf | 1076 | ath_rc_update_ht(sc, ath_rc_priv, tx_info, rix, xretries, long_retry); |
f078f209 LR |
1077 | } |
1078 | ||
4f0fc7c3 LR |
1079 | static const |
1080 | struct ath_rate_table *ath_choose_rate_table(struct ath_softc *sc, | |
1081 | enum ieee80211_band band, | |
1082 | bool is_ht, | |
1083 | bool is_cw_40) | |
e11602b7 S |
1084 | { |
1085 | int mode = 0; | |
c46917bb | 1086 | struct ath_common *common = ath9k_hw_common(sc->sc_ah); |
e11602b7 S |
1087 | |
1088 | switch(band) { | |
1089 | case IEEE80211_BAND_2GHZ: | |
1090 | mode = ATH9K_MODE_11G; | |
1091 | if (is_ht) | |
1092 | mode = ATH9K_MODE_11NG_HT20; | |
1093 | if (is_cw_40) | |
1094 | mode = ATH9K_MODE_11NG_HT40PLUS; | |
1095 | break; | |
1096 | case IEEE80211_BAND_5GHZ: | |
1097 | mode = ATH9K_MODE_11A; | |
1098 | if (is_ht) | |
1099 | mode = ATH9K_MODE_11NA_HT20; | |
1100 | if (is_cw_40) | |
1101 | mode = ATH9K_MODE_11NA_HT40PLUS; | |
1102 | break; | |
1103 | default: | |
c46917bb | 1104 | ath_print(common, ATH_DBG_CONFIG, "Invalid band\n"); |
e11602b7 S |
1105 | return NULL; |
1106 | } | |
1107 | ||
1108 | BUG_ON(mode >= ATH9K_MODE_MAX); | |
1109 | ||
c46917bb LR |
1110 | ath_print(common, ATH_DBG_CONFIG, |
1111 | "Choosing rate table for mode: %d\n", mode); | |
545750d3 FF |
1112 | |
1113 | sc->cur_rate_mode = mode; | |
1114 | return hw_rate_table[mode]; | |
e11602b7 S |
1115 | } |
1116 | ||
5ddfac3b | 1117 | static void ath_rc_init(struct ath_softc *sc, |
46d14a58 | 1118 | struct ath_rate_priv *ath_rc_priv, |
5ddfac3b | 1119 | struct ieee80211_supported_band *sband, |
9331ec80 | 1120 | struct ieee80211_sta *sta, |
4f0fc7c3 | 1121 | const struct ath_rate_table *rate_table) |
f078f209 | 1122 | { |
5ddfac3b | 1123 | struct ath_rateset *rateset = &ath_rc_priv->neg_rates; |
c46917bb | 1124 | struct ath_common *common = ath9k_hw_common(sc->sc_ah); |
5ddfac3b | 1125 | u8 *ht_mcs = (u8 *)&ath_rc_priv->neg_ht_rates; |
f078f209 | 1126 | u8 i, j, k, hi = 0, hthi = 0; |
f078f209 LR |
1127 | |
1128 | /* Initial rate table size. Will change depending | |
1129 | * on the working rate set */ | |
46d14a58 | 1130 | ath_rc_priv->rate_table_size = RATE_TABLE_SIZE; |
f078f209 LR |
1131 | |
1132 | /* Initialize thresholds according to the global rate table */ | |
5ddfac3b | 1133 | for (i = 0 ; i < ath_rc_priv->rate_table_size; i++) { |
922bac60 | 1134 | ath_rc_priv->per[i] = 0; |
f078f209 LR |
1135 | } |
1136 | ||
1137 | /* Determine the valid rates */ | |
256b7759 | 1138 | ath_rc_init_valid_txmask(ath_rc_priv); |
f078f209 LR |
1139 | |
1140 | for (i = 0; i < WLAN_RC_PHY_MAX; i++) { | |
1141 | for (j = 0; j < MAX_TX_RATE_PHY; j++) | |
256b7759 S |
1142 | ath_rc_priv->valid_phy_rateidx[i][j] = 0; |
1143 | ath_rc_priv->valid_phy_ratecnt[i] = 0; | |
f078f209 | 1144 | } |
f078f209 | 1145 | |
f078f209 LR |
1146 | if (!rateset->rs_nrates) { |
1147 | /* No working rate, just initialize valid rates */ | |
2c5a744d | 1148 | hi = ath_rc_init_validrates(ath_rc_priv, rate_table, |
c89424df | 1149 | ath_rc_priv->ht_cap); |
f078f209 LR |
1150 | } else { |
1151 | /* Use intersection of working rates and valid rates */ | |
2c5a744d | 1152 | hi = ath_rc_setvalid_rates(ath_rc_priv, rate_table, |
c89424df | 1153 | rateset, ath_rc_priv->ht_cap); |
5ddfac3b | 1154 | if (ath_rc_priv->ht_cap & WLAN_RC_HT_FLAG) { |
2c5a744d | 1155 | hthi = ath_rc_setvalid_htrates(ath_rc_priv, |
c89424df S |
1156 | rate_table, |
1157 | ht_mcs, | |
1158 | ath_rc_priv->ht_cap); | |
f078f209 LR |
1159 | } |
1160 | hi = A_MAX(hi, hthi); | |
1161 | } | |
1162 | ||
256b7759 S |
1163 | ath_rc_priv->rate_table_size = hi + 1; |
1164 | ath_rc_priv->rate_max_phy = 0; | |
9680e8a3 | 1165 | BUG_ON(ath_rc_priv->rate_table_size > RATE_TABLE_SIZE); |
f078f209 LR |
1166 | |
1167 | for (i = 0, k = 0; i < WLAN_RC_PHY_MAX; i++) { | |
256b7759 S |
1168 | for (j = 0; j < ath_rc_priv->valid_phy_ratecnt[i]; j++) { |
1169 | ath_rc_priv->valid_rate_index[k++] = | |
1170 | ath_rc_priv->valid_phy_rateidx[i][j]; | |
f078f209 LR |
1171 | } |
1172 | ||
46d14a58 | 1173 | if (!ath_rc_valid_phyrate(i, rate_table->initial_ratemax, 1) |
256b7759 | 1174 | || !ath_rc_priv->valid_phy_ratecnt[i]) |
f078f209 LR |
1175 | continue; |
1176 | ||
256b7759 | 1177 | ath_rc_priv->rate_max_phy = ath_rc_priv->valid_phy_rateidx[i][j-1]; |
f078f209 | 1178 | } |
9680e8a3 LR |
1179 | BUG_ON(ath_rc_priv->rate_table_size > RATE_TABLE_SIZE); |
1180 | BUG_ON(k > RATE_TABLE_SIZE); | |
f078f209 | 1181 | |
256b7759 | 1182 | ath_rc_priv->max_valid_rate = k; |
256b7759 S |
1183 | ath_rc_sort_validrates(rate_table, ath_rc_priv); |
1184 | ath_rc_priv->rate_max_phy = ath_rc_priv->valid_rate_index[k-4]; | |
40990ec0 | 1185 | sc->cur_rate_table = rate_table; |
9331ec80 | 1186 | |
c46917bb LR |
1187 | ath_print(common, ATH_DBG_CONFIG, |
1188 | "RC Initialized with capabilities: 0x%x\n", | |
1189 | ath_rc_priv->ht_cap); | |
f078f209 LR |
1190 | } |
1191 | ||
c2da50e5 | 1192 | static u8 ath_rc_build_ht_caps(struct ath_softc *sc, struct ieee80211_sta *sta, |
6473d24d | 1193 | bool is_cw40, bool is_sgi) |
9331ec80 S |
1194 | { |
1195 | u8 caps = 0; | |
1196 | ||
c2da50e5 | 1197 | if (sta->ht_cap.ht_supported) { |
9331ec80 | 1198 | caps = WLAN_RC_HT_FLAG; |
3553727c FF |
1199 | if (sta->ht_cap.mcs.rx_mask[1]) |
1200 | caps |= WLAN_RC_DS_FLAG; | |
9331ec80 S |
1201 | if (is_cw40) |
1202 | caps |= WLAN_RC_40_FLAG; | |
6473d24d | 1203 | if (is_sgi) |
9331ec80 | 1204 | caps |= WLAN_RC_SGI_FLAG; |
6473d24d | 1205 | |
9331ec80 S |
1206 | } |
1207 | ||
1208 | return caps; | |
1209 | } | |
1210 | ||
1211 | /***********************************/ | |
1212 | /* mac80211 Rate Control callbacks */ | |
1213 | /***********************************/ | |
1214 | ||
4b7679a5 JB |
1215 | static void ath_tx_status(void *priv, struct ieee80211_supported_band *sband, |
1216 | struct ieee80211_sta *sta, void *priv_sta, | |
f078f209 LR |
1217 | struct sk_buff *skb) |
1218 | { | |
1219 | struct ath_softc *sc = priv; | |
46d14a58 | 1220 | struct ath_rate_priv *ath_rc_priv = priv_sta; |
f078f209 LR |
1221 | struct ieee80211_tx_info *tx_info = IEEE80211_SKB_CB(skb); |
1222 | struct ieee80211_hdr *hdr; | |
827e69bf FF |
1223 | int final_ts_idx = 0, tx_status = 0, is_underrun = 0; |
1224 | int long_retry = 0; | |
f078f209 | 1225 | __le16 fc; |
827e69bf | 1226 | int i; |
f078f209 | 1227 | |
f078f209 LR |
1228 | hdr = (struct ieee80211_hdr *)skb->data; |
1229 | fc = hdr->frame_control; | |
827e69bf FF |
1230 | for (i = 0; i < IEEE80211_TX_MAX_RATES; i++) { |
1231 | struct ieee80211_tx_rate *rate = &tx_info->status.rates[i]; | |
1232 | if (!rate->count) | |
1233 | break; | |
1234 | ||
1235 | final_ts_idx = i; | |
1236 | long_retry = rate->count - 1; | |
1237 | } | |
f078f209 | 1238 | |
d969847c FF |
1239 | if (!priv_sta || !ieee80211_is_data(fc)) |
1240 | return; | |
1241 | ||
1242 | /* This packet was aggregated but doesn't carry status info */ | |
1243 | if ((tx_info->flags & IEEE80211_TX_CTL_AMPDU) && | |
1244 | !(tx_info->flags & IEEE80211_TX_STAT_AMPDU)) | |
827e69bf | 1245 | return; |
e6a9854b | 1246 | |
827e69bf FF |
1247 | if (tx_info->flags & IEEE80211_TX_STAT_TX_FILTERED) |
1248 | return; | |
e6a9854b | 1249 | |
46d14a58 | 1250 | /* |
f4709fdf LR |
1251 | * If an underrun error is seen assume it as an excessive retry only |
1252 | * if max frame trigger level has been reached (2 KB for singel stream, | |
1253 | * and 4 KB for dual stream). Adjust the long retry as if the frame was | |
1254 | * tried hw->max_rate_tries times to affect how ratectrl updates PER for | |
1255 | * the failed rate. In case of congestion on the bus penalizing these | |
1256 | * type of underruns should help hardware actually transmit new frames | |
1257 | * successfully by eventually preferring slower rates. This itself | |
1258 | * should also alleviate congestion on the bus. | |
46d14a58 | 1259 | */ |
827e69bf FF |
1260 | if ((tx_info->pad[0] & ATH_TX_INFO_UNDERRUN) && |
1261 | (sc->sc_ah->tx_trig_level >= ath_rc_priv->tx_triglevel_max)) { | |
46d14a58 S |
1262 | tx_status = 1; |
1263 | is_underrun = 1; | |
1264 | } | |
1265 | ||
827e69bf | 1266 | if (tx_info->pad[0] & ATH_TX_INFO_XRETRY) |
46d14a58 S |
1267 | tx_status = 1; |
1268 | ||
1269 | ath_rc_tx_status(sc, ath_rc_priv, tx_info, final_ts_idx, tx_status, | |
827e69bf | 1270 | (is_underrun) ? sc->hw->max_rate_tries : long_retry); |
46d14a58 | 1271 | |
d22b0022 | 1272 | /* Check if aggregation has to be enabled for this tid */ |
d5c232ff VT |
1273 | if (conf_is_ht(&sc->hw->conf) && |
1274 | !(skb->protocol == cpu_to_be16(ETH_P_PAE))) { | |
d22b0022 S |
1275 | if (ieee80211_is_data_qos(fc)) { |
1276 | u8 *qc, tid; | |
1277 | struct ath_node *an; | |
1278 | ||
1279 | qc = ieee80211_get_qos_ctl(hdr); | |
1280 | tid = qc[0] & 0xf; | |
1281 | an = (struct ath_node *)sta->drv_priv; | |
1282 | ||
1283 | if(ath_tx_aggr_check(sc, an, tid)) | |
c951ad35 | 1284 | ieee80211_start_tx_ba_session(sta, tid); |
d22b0022 S |
1285 | } |
1286 | } | |
7a7dec65 | 1287 | |
545750d3 FF |
1288 | ath_debug_stat_rc(sc, ath_rc_get_rateindex(sc->cur_rate_table, |
1289 | &tx_info->status.rates[final_ts_idx])); | |
f078f209 LR |
1290 | } |
1291 | ||
4b7679a5 JB |
1292 | static void ath_rate_init(void *priv, struct ieee80211_supported_band *sband, |
1293 | struct ieee80211_sta *sta, void *priv_sta) | |
f078f209 | 1294 | { |
4b7679a5 | 1295 | struct ath_softc *sc = priv; |
46d14a58 | 1296 | struct ath_rate_priv *ath_rc_priv = priv_sta; |
545750d3 | 1297 | const struct ath_rate_table *rate_table; |
6473d24d | 1298 | bool is_cw40, is_sgi = false; |
f078f209 LR |
1299 | int i, j = 0; |
1300 | ||
7b4d2735 S |
1301 | for (i = 0; i < sband->n_bitrates; i++) { |
1302 | if (sta->supp_rates[sband->band] & BIT(i)) { | |
1303 | ath_rc_priv->neg_rates.rs_rates[j] | |
1304 | = (sband->bitrates[i].bitrate * 2) / 10; | |
1305 | j++; | |
1306 | } | |
1307 | } | |
1308 | ath_rc_priv->neg_rates.rs_nrates = j; | |
f078f209 | 1309 | |
a4510bf8 | 1310 | if (sta->ht_cap.ht_supported) { |
7b4d2735 | 1311 | for (i = 0, j = 0; i < 77; i++) { |
ae5eb026 | 1312 | if (sta->ht_cap.mcs.rx_mask[i/8] & (1<<(i%8))) |
dc2222a8 | 1313 | ath_rc_priv->neg_ht_rates.rs_rates[j++] = i; |
f078f209 LR |
1314 | if (j == ATH_RATE_MAX) |
1315 | break; | |
1316 | } | |
dc2222a8 | 1317 | ath_rc_priv->neg_ht_rates.rs_nrates = j; |
f078f209 | 1318 | } |
7b4d2735 | 1319 | |
9331ec80 | 1320 | is_cw40 = sta->ht_cap.cap & IEEE80211_HT_CAP_SUP_WIDTH_20_40; |
6473d24d VT |
1321 | |
1322 | if (is_cw40) | |
1323 | is_sgi = sta->ht_cap.cap & IEEE80211_HT_CAP_SGI_40; | |
1324 | else if (sc->sc_ah->caps.hw_caps & ATH9K_HW_CAP_SGI_20) | |
1325 | is_sgi = sta->ht_cap.cap & IEEE80211_HT_CAP_SGI_20; | |
9331ec80 S |
1326 | |
1327 | /* Choose rate table first */ | |
1328 | ||
1329 | if ((sc->sc_ah->opmode == NL80211_IFTYPE_STATION) || | |
9cb5412b | 1330 | (sc->sc_ah->opmode == NL80211_IFTYPE_MESH_POINT) || |
9331ec80 S |
1331 | (sc->sc_ah->opmode == NL80211_IFTYPE_ADHOC)) { |
1332 | rate_table = ath_choose_rate_table(sc, sband->band, | |
545750d3 FF |
1333 | sta->ht_cap.ht_supported, is_cw40); |
1334 | } else { | |
1335 | rate_table = hw_rate_table[sc->cur_rate_mode]; | |
9331ec80 S |
1336 | } |
1337 | ||
6473d24d | 1338 | ath_rc_priv->ht_cap = ath_rc_build_ht_caps(sc, sta, is_cw40, is_sgi); |
9331ec80 S |
1339 | ath_rc_init(sc, priv_sta, sband, sta, rate_table); |
1340 | } | |
1341 | ||
1342 | static void ath_rate_update(void *priv, struct ieee80211_supported_band *sband, | |
1343 | struct ieee80211_sta *sta, void *priv_sta, | |
4fa00437 | 1344 | u32 changed, enum nl80211_channel_type oper_chan_type) |
9331ec80 S |
1345 | { |
1346 | struct ath_softc *sc = priv; | |
1347 | struct ath_rate_priv *ath_rc_priv = priv_sta; | |
4f0fc7c3 | 1348 | const struct ath_rate_table *rate_table = NULL; |
6473d24d | 1349 | bool oper_cw40 = false, oper_sgi; |
9331ec80 S |
1350 | bool local_cw40 = (ath_rc_priv->ht_cap & WLAN_RC_40_FLAG) ? |
1351 | true : false; | |
6473d24d | 1352 | bool local_sgi = (ath_rc_priv->ht_cap & WLAN_RC_SGI_FLAG) ? |
9331ec80 S |
1353 | true : false; |
1354 | ||
1355 | /* FIXME: Handle AP mode later when we support CWM */ | |
1356 | ||
1357 | if (changed & IEEE80211_RC_HT_CHANGED) { | |
1358 | if (sc->sc_ah->opmode != NL80211_IFTYPE_STATION) | |
1359 | return; | |
1360 | ||
4fa00437 S |
1361 | if (oper_chan_type == NL80211_CHAN_HT40MINUS || |
1362 | oper_chan_type == NL80211_CHAN_HT40PLUS) | |
9331ec80 S |
1363 | oper_cw40 = true; |
1364 | ||
6473d24d VT |
1365 | if (oper_cw40) |
1366 | oper_sgi = (sta->ht_cap.cap & IEEE80211_HT_CAP_SGI_40) ? | |
1367 | true : false; | |
1368 | else if (sc->sc_ah->caps.hw_caps & ATH9K_HW_CAP_SGI_20) | |
1369 | oper_sgi = (sta->ht_cap.cap & IEEE80211_HT_CAP_SGI_20) ? | |
1370 | true : false; | |
1371 | else | |
1372 | oper_sgi = false; | |
9331ec80 | 1373 | |
6473d24d | 1374 | if ((local_cw40 != oper_cw40) || (local_sgi != oper_sgi)) { |
9331ec80 S |
1375 | rate_table = ath_choose_rate_table(sc, sband->band, |
1376 | sta->ht_cap.ht_supported, | |
1377 | oper_cw40); | |
c2da50e5 | 1378 | ath_rc_priv->ht_cap = ath_rc_build_ht_caps(sc, sta, |
6473d24d | 1379 | oper_cw40, oper_sgi); |
9331ec80 S |
1380 | ath_rc_init(sc, priv_sta, sband, sta, rate_table); |
1381 | ||
c46917bb LR |
1382 | ath_print(ath9k_hw_common(sc->sc_ah), ATH_DBG_CONFIG, |
1383 | "Operating HT Bandwidth changed to: %d\n", | |
1384 | sc->hw->conf.channel_type); | |
545750d3 | 1385 | sc->cur_rate_table = hw_rate_table[sc->cur_rate_mode]; |
9331ec80 S |
1386 | } |
1387 | } | |
f078f209 LR |
1388 | } |
1389 | ||
4b7679a5 | 1390 | static void *ath_rate_alloc(struct ieee80211_hw *hw, struct dentry *debugfsdir) |
f078f209 | 1391 | { |
bce048d7 JM |
1392 | struct ath_wiphy *aphy = hw->priv; |
1393 | return aphy->sc; | |
f078f209 LR |
1394 | } |
1395 | ||
1396 | static void ath_rate_free(void *priv) | |
1397 | { | |
1398 | return; | |
1399 | } | |
1400 | ||
4b7679a5 | 1401 | static void *ath_rate_alloc_sta(void *priv, struct ieee80211_sta *sta, gfp_t gfp) |
f078f209 LR |
1402 | { |
1403 | struct ath_softc *sc = priv; | |
46d14a58 | 1404 | struct ath_rate_priv *rate_priv; |
f078f209 | 1405 | |
46d14a58 | 1406 | rate_priv = kzalloc(sizeof(struct ath_rate_priv), gfp); |
f078f209 | 1407 | if (!rate_priv) { |
c46917bb LR |
1408 | ath_print(ath9k_hw_common(sc->sc_ah), ATH_DBG_FATAL, |
1409 | "Unable to allocate private rc structure\n"); | |
f078f209 LR |
1410 | return NULL; |
1411 | } | |
fe60594a | 1412 | |
2660b81a | 1413 | rate_priv->tx_triglevel_max = sc->sc_ah->caps.tx_triglevel_max; |
dc2222a8 | 1414 | |
f078f209 LR |
1415 | return rate_priv; |
1416 | } | |
1417 | ||
4b7679a5 JB |
1418 | static void ath_rate_free_sta(void *priv, struct ieee80211_sta *sta, |
1419 | void *priv_sta) | |
f078f209 | 1420 | { |
46d14a58 | 1421 | struct ath_rate_priv *rate_priv = priv_sta; |
fe60594a | 1422 | kfree(rate_priv); |
f078f209 LR |
1423 | } |
1424 | ||
1425 | static struct rate_control_ops ath_rate_ops = { | |
1426 | .module = NULL, | |
1427 | .name = "ath9k_rate_control", | |
1428 | .tx_status = ath_tx_status, | |
1429 | .get_rate = ath_get_rate, | |
1430 | .rate_init = ath_rate_init, | |
9331ec80 | 1431 | .rate_update = ath_rate_update, |
f078f209 LR |
1432 | .alloc = ath_rate_alloc, |
1433 | .free = ath_rate_free, | |
1434 | .alloc_sta = ath_rate_alloc_sta, | |
4b7679a5 | 1435 | .free_sta = ath_rate_free_sta, |
f078f209 LR |
1436 | }; |
1437 | ||
1438 | int ath_rate_control_register(void) | |
1439 | { | |
1440 | return ieee80211_rate_control_register(&ath_rate_ops); | |
1441 | } | |
1442 | ||
1443 | void ath_rate_control_unregister(void) | |
1444 | { | |
1445 | ieee80211_rate_control_unregister(&ath_rate_ops); | |
1446 | } |