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ath9k: Cleanup ath_rc_setvalid_htrates
[GitHub/mt8127/android_kernel_alcatel_ttab.git] / drivers / net / wireless / ath / ath9k / rc.c
CommitLineData
f078f209
LR		 1/*
2 * Copyright (c) 2004 Video54 Technologies, Inc.
5b68138e 3 * Copyright (c) 2004-2011 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 18#include <linux/slab.h>
ee40fa06 19#include <linux/export.h>
5a0e3ad6 20
394cf0a1 21#include "ath9k.h"
f078f209 22
4f0fc7c3 23static const struct ath_rate_table ar5416_11na_ratetable = {
1d9d06a2 24 68,
545750d3 25 8, /* MCS start */
f078f209 26 {
1d9d06a2 27 [0] = { RC_L_SDT, WLAN_RC_PHY_OFDM, 6000,
aaa41ec4 28 5400, 0, 12, 0, 0, 0, 0 }, /* 6 Mb */
1d9d06a2 29 [1] = { RC_L_SDT, WLAN_RC_PHY_OFDM, 9000,
aaa41ec4 30 7800, 1, 18, 0, 1, 1, 1 }, /* 9 Mb */
1d9d06a2 31 [2] = { RC_L_SDT, WLAN_RC_PHY_OFDM, 12000,
aaa41ec4 32 10000, 2, 24, 2, 2, 2, 2 }, /* 12 Mb */
1d9d06a2 33 [3] = { RC_L_SDT, WLAN_RC_PHY_OFDM, 18000,
aaa41ec4 34 13900, 3, 36, 2, 3, 3, 3 }, /* 18 Mb */
1d9d06a2 35 [4] = { RC_L_SDT, WLAN_RC_PHY_OFDM, 24000,
aaa41ec4 36 17300, 4, 48, 4, 4, 4, 4 }, /* 24 Mb */
1d9d06a2 37 [5] = { RC_L_SDT, WLAN_RC_PHY_OFDM, 36000,
aaa41ec4 38 23000, 5, 72, 4, 5, 5, 5 }, /* 36 Mb */
1d9d06a2 39 [6] = { RC_L_SDT, WLAN_RC_PHY_OFDM, 48000,
aaa41ec4 40 27400, 6, 96, 4, 6, 6, 6 }, /* 48 Mb */
1d9d06a2 41 [7] = { RC_L_SDT, WLAN_RC_PHY_OFDM, 54000,
aaa41ec4 42 29300, 7, 108, 4, 7, 7, 7 }, /* 54 Mb */
1d9d06a2 43 [8] = { RC_HT_SDT_2040, WLAN_RC_PHY_HT_20_SS, 6500,
aaa41ec4 44 6400, 0, 0, 0, 38, 8, 38 }, /* 6.5 Mb */
1d9d06a2 45 [9] = { RC_HT_SDT_20, WLAN_RC_PHY_HT_20_SS, 13000,
aaa41ec4 46 12700, 1, 1, 2, 39, 9, 39 }, /* 13 Mb */
1d9d06a2 47 [10] = { RC_HT_SDT_20, WLAN_RC_PHY_HT_20_SS, 19500,
aaa41ec4 48 18800, 2, 2, 2, 40, 10, 40 }, /* 19.5 Mb */
1d9d06a2 49 [11] = { RC_HT_SD_20, WLAN_RC_PHY_HT_20_SS, 26000,
aaa41ec4 50 25000, 3, 3, 4, 41, 11, 41 }, /* 26 Mb */
1d9d06a2 51 [12] = { RC_HT_SD_20, WLAN_RC_PHY_HT_20_SS, 39000,
aaa41ec4 52 36700, 4, 4, 4, 42, 12, 42 }, /* 39 Mb */
1d9d06a2 53 [13] = { RC_HT_S_20, WLAN_RC_PHY_HT_20_SS, 52000,
aaa41ec4 54 48100, 5, 5, 4, 43, 13, 43 }, /* 52 Mb */
1d9d06a2 55 [14] = { RC_HT_S_20, WLAN_RC_PHY_HT_20_SS, 58500,
aaa41ec4 56 53500, 6, 6, 4, 44, 14, 44 }, /* 58.5 Mb */
1d9d06a2 57 [15] = { RC_HT_S_20, WLAN_RC_PHY_HT_20_SS, 65000,
aaa41ec4 58 59000, 7, 7, 4, 45, 16, 46 }, /* 65 Mb */
1d9d06a2 59 [16] = { RC_HT_S_20, WLAN_RC_PHY_HT_20_SS_HGI, 72200,
aaa41ec4 60 65400, 7, 7, 4, 45, 16, 46 }, /* 75 Mb */
1d9d06a2 61 [17] = { RC_INVALID, WLAN_RC_PHY_HT_20_DS, 13000,
aaa41ec4 62 12700, 8, 8, 0, 47, 17, 47 }, /* 13 Mb */
1d9d06a2 63 [18] = { RC_HT_T_20, WLAN_RC_PHY_HT_20_DS, 26000,
aaa41ec4 64 24800, 9, 9, 2, 48, 18, 48 }, /* 26 Mb */
1d9d06a2 65 [19] = { RC_HT_T_20, WLAN_RC_PHY_HT_20_DS, 39000,
aaa41ec4 66 36600, 10, 10, 2, 49, 19, 49 }, /* 39 Mb */
1d9d06a2 67 [20] = { RC_HT_DT_20, WLAN_RC_PHY_HT_20_DS, 52000,
aaa41ec4 68 48100, 11, 11, 4, 50, 20, 50 }, /* 52 Mb */
1d9d06a2 69 [21] = { RC_HT_DT_20, WLAN_RC_PHY_HT_20_DS, 78000,
aaa41ec4 70 69500, 12, 12, 4, 51, 21, 51 }, /* 78 Mb */
1d9d06a2 71 [22] = { RC_HT_DT_20, WLAN_RC_PHY_HT_20_DS, 104000,
aaa41ec4 72 89500, 13, 13, 4, 52, 22, 52 }, /* 104 Mb */
1d9d06a2 73 [23] = { RC_HT_DT_20, WLAN_RC_PHY_HT_20_DS, 117000,
aaa41ec4 74 98900, 14, 14, 4, 53, 23, 53 }, /* 117 Mb */
1d9d06a2 75 [24] = { RC_HT_DT_20, WLAN_RC_PHY_HT_20_DS, 130000,
aaa41ec4 76 108300, 15, 15, 4, 54, 25, 55 }, /* 130 Mb */
1d9d06a2 77 [25] = { RC_HT_DT_20, WLAN_RC_PHY_HT_20_DS_HGI, 144400,
aaa41ec4 78 120000, 15, 15, 4, 54, 25, 55 }, /* 144.4 Mb */
1d9d06a2 79 [26] = { RC_INVALID, WLAN_RC_PHY_HT_20_TS, 19500,
aaa41ec4 80 17400, 16, 16, 0, 56, 26, 56 }, /* 19.5 Mb */
1d9d06a2 81 [27] = { RC_INVALID, WLAN_RC_PHY_HT_20_TS, 39000,
aaa41ec4 82 35100, 17, 17, 2, 57, 27, 57 }, /* 39 Mb */
1d9d06a2 83 [28] = { RC_INVALID, WLAN_RC_PHY_HT_20_TS, 58500,
aaa41ec4 84 52600, 18, 18, 2, 58, 28, 58 }, /* 58.5 Mb */
1d9d06a2 85 [29] = { RC_INVALID, WLAN_RC_PHY_HT_20_TS, 78000,
aaa41ec4 86 70400, 19, 19, 4, 59, 29, 59 }, /* 78 Mb */
1d9d06a2 87 [30] = { RC_INVALID, WLAN_RC_PHY_HT_20_TS, 117000,
aaa41ec4 88 104900, 20, 20, 4, 60, 31, 61 }, /* 117 Mb */
1d9d06a2 89 [31] = { RC_INVALID, WLAN_RC_PHY_HT_20_TS_HGI, 130000,
aaa41ec4 90 115800, 20, 20, 4, 60, 31, 61 }, /* 130 Mb*/
1d9d06a2 91 [32] = { RC_HT_T_20, WLAN_RC_PHY_HT_20_TS, 156000,
aaa41ec4 92 137200, 21, 21, 4, 62, 33, 63 }, /* 156 Mb */
1d9d06a2 93 [33] = { RC_HT_T_20, WLAN_RC_PHY_HT_20_TS_HGI, 173300,
aaa41ec4 94 151100, 21, 21, 4, 62, 33, 63 }, /* 173.3 Mb */
1d9d06a2 95 [34] = { RC_HT_T_20, WLAN_RC_PHY_HT_20_TS, 175500,
aaa41ec4 96 152800, 22, 22, 4, 64, 35, 65 }, /* 175.5 Mb */
1d9d06a2 97 [35] = { RC_HT_T_20, WLAN_RC_PHY_HT_20_TS_HGI, 195000,
aaa41ec4 98 168400, 22, 22, 4, 64, 35, 65 }, /* 195 Mb*/
1d9d06a2 99 [36] = { RC_HT_T_20, WLAN_RC_PHY_HT_20_TS, 195000,
aaa41ec4 100 168400, 23, 23, 4, 66, 37, 67 }, /* 195 Mb */
1d9d06a2 101 [37] = { RC_HT_T_20, WLAN_RC_PHY_HT_20_TS_HGI, 216700,
aaa41ec4 102 185000, 23, 23, 4, 66, 37, 67 }, /* 216.7 Mb */
1d9d06a2 103 [38] = { RC_HT_SDT_40, WLAN_RC_PHY_HT_40_SS, 13500,
aaa41ec4 104 13200, 0, 0, 0, 38, 38, 38 }, /* 13.5 Mb*/
1d9d06a2 105 [39] = { RC_HT_SDT_40, WLAN_RC_PHY_HT_40_SS, 27500,
aaa41ec4 106 25900, 1, 1, 2, 39, 39, 39 }, /* 27.0 Mb*/
1d9d06a2 107 [40] = { RC_HT_SDT_40, WLAN_RC_PHY_HT_40_SS, 40500,
aaa41ec4 108 38600, 2, 2, 2, 40, 40, 40 }, /* 40.5 Mb*/
1d9d06a2 109 [41] = { RC_HT_SD_40, WLAN_RC_PHY_HT_40_SS, 54000,
aaa41ec4 110 49800, 3, 3, 4, 41, 41, 41 }, /* 54 Mb */
1d9d06a2 111 [42] = { RC_HT_SD_40, WLAN_RC_PHY_HT_40_SS, 81500,
aaa41ec4 112 72200, 4, 4, 4, 42, 42, 42 }, /* 81 Mb */
1d9d06a2 113 [43] = { RC_HT_S_40, WLAN_RC_PHY_HT_40_SS, 108000,
aaa41ec4 114 92900, 5, 5, 4, 43, 43, 43 }, /* 108 Mb */
1d9d06a2 115 [44] = { RC_HT_S_40, WLAN_RC_PHY_HT_40_SS, 121500,
aaa41ec4 116 102700, 6, 6, 4, 44, 44, 44 }, /* 121.5 Mb*/
1d9d06a2 117 [45] = { RC_HT_S_40, WLAN_RC_PHY_HT_40_SS, 135000,
aaa41ec4 118 112000, 7, 7, 4, 45, 46, 46 }, /* 135 Mb */
1d9d06a2 119 [46] = { RC_HT_S_40, WLAN_RC_PHY_HT_40_SS_HGI, 150000,
aaa41ec4 120 122000, 7, 7, 4, 45, 46, 46 }, /* 150 Mb */
1d9d06a2 121 [47] = { RC_INVALID, WLAN_RC_PHY_HT_40_DS, 27000,
aaa41ec4 122 25800, 8, 8, 0, 47, 47, 47 }, /* 27 Mb */
1d9d06a2 123 [48] = { RC_HT_T_40, WLAN_RC_PHY_HT_40_DS, 54000,
aaa41ec4 124 49800, 9, 9, 2, 48, 48, 48 }, /* 54 Mb */
1d9d06a2 125 [49] = { RC_HT_T_40, WLAN_RC_PHY_HT_40_DS, 81000,
aaa41ec4 126 71900, 10, 10, 2, 49, 49, 49 }, /* 81 Mb */
1d9d06a2 127 [50] = { RC_HT_DT_40, WLAN_RC_PHY_HT_40_DS, 108000,
aaa41ec4 128 92500, 11, 11, 4, 50, 50, 50 }, /* 108 Mb */
1d9d06a2 129 [51] = { RC_HT_DT_40, WLAN_RC_PHY_HT_40_DS, 162000,
aaa41ec4 130 130300, 12, 12, 4, 51, 51, 51 }, /* 162 Mb */
1d9d06a2 131 [52] = { RC_HT_DT_40, WLAN_RC_PHY_HT_40_DS, 216000,
aaa41ec4 132 162800, 13, 13, 4, 52, 52, 52 }, /* 216 Mb */
1d9d06a2 133 [53] = { RC_HT_DT_40, WLAN_RC_PHY_HT_40_DS, 243000,
aaa41ec4 134 178200, 14, 14, 4, 53, 53, 53 }, /* 243 Mb */
1d9d06a2 135 [54] = { RC_HT_DT_40, WLAN_RC_PHY_HT_40_DS, 270000,
aaa41ec4 136 192100, 15, 15, 4, 54, 55, 55 }, /* 270 Mb */
1d9d06a2 137 [55] = { RC_HT_DT_40, WLAN_RC_PHY_HT_40_DS_HGI, 300000,
aaa41ec4 138 207000, 15, 15, 4, 54, 55, 55 }, /* 300 Mb */
1d9d06a2 139 [56] = { RC_INVALID, WLAN_RC_PHY_HT_40_TS, 40500,
aaa41ec4 140 36100, 16, 16, 0, 56, 56, 56 }, /* 40.5 Mb */
1d9d06a2 141 [57] = { RC_INVALID, WLAN_RC_PHY_HT_40_TS, 81000,
aaa41ec4 142 72900, 17, 17, 2, 57, 57, 57 }, /* 81 Mb */
1d9d06a2 143 [58] = { RC_INVALID, WLAN_RC_PHY_HT_40_TS, 121500,
aaa41ec4 144 108300, 18, 18, 2, 58, 58, 58 }, /* 121.5 Mb */
1d9d06a2 145 [59] = { RC_INVALID, WLAN_RC_PHY_HT_40_TS, 162000,
aaa41ec4 146 142000, 19, 19, 4, 59, 59, 59 }, /* 162 Mb */
1d9d06a2 147 [60] = { RC_INVALID, WLAN_RC_PHY_HT_40_TS, 243000,
aaa41ec4 148 205100, 20, 20, 4, 60, 61, 61 }, /* 243 Mb */
1d9d06a2 149 [61] = { RC_INVALID, WLAN_RC_PHY_HT_40_TS_HGI, 270000,
aaa41ec4 150 224700, 20, 20, 4, 60, 61, 61 }, /* 270 Mb */
1d9d06a2 151 [62] = { RC_HT_T_40, WLAN_RC_PHY_HT_40_TS, 324000,
aaa41ec4 152 263100, 21, 21, 4, 62, 63, 63 }, /* 324 Mb */
1d9d06a2 153 [63] = { RC_HT_T_40, WLAN_RC_PHY_HT_40_TS_HGI, 360000,
aaa41ec4 154 288000, 21, 21, 4, 62, 63, 63 }, /* 360 Mb */
1d9d06a2 155 [64] = { RC_HT_T_40, WLAN_RC_PHY_HT_40_TS, 364500,
aaa41ec4 156 290700, 22, 22, 4, 64, 65, 65 }, /* 364.5 Mb */
1d9d06a2 157 [65] = { RC_HT_T_40, WLAN_RC_PHY_HT_40_TS_HGI, 405000,
aaa41ec4 158 317200, 22, 22, 4, 64, 65, 65 }, /* 405 Mb */
1d9d06a2 159 [66] = { RC_HT_T_40, WLAN_RC_PHY_HT_40_TS, 405000,
aaa41ec4 160 317200, 23, 23, 4, 66, 67, 67 }, /* 405 Mb */
1d9d06a2 161 [67] = { RC_HT_T_40, WLAN_RC_PHY_HT_40_TS_HGI, 450000,
aaa41ec4 162 346400, 23, 23, 4, 66, 67, 67 }, /* 450 Mb */
f078f209
LR		 163 },
164 50, /* probe interval */
f078f209
LR		 165 WLAN_RC_HT_FLAG, /* Phy rates allowed initially */
166};
167
f078f209
LR		 168/* 4ms frame limit not used for NG mode. The values filled
169 * for HT are the 64K max aggregate limit */
170
4f0fc7c3 171static const struct ath_rate_table ar5416_11ng_ratetable = {
1d9d06a2 172 72,
545750d3 173 12, /* MCS start */
f078f209 174 {
1d9d06a2 175 [0] = { RC_ALL, WLAN_RC_PHY_CCK, 1000,
aaa41ec4 176 900, 0, 2, 0, 0, 0, 0 }, /* 1 Mb */
1d9d06a2 177 [1] = { RC_ALL, WLAN_RC_PHY_CCK, 2000,
aaa41ec4 178 1900, 1, 4, 1, 1, 1, 1 }, /* 2 Mb */
1d9d06a2 179 [2] = { RC_ALL, WLAN_RC_PHY_CCK, 5500,
aaa41ec4 180 4900, 2, 11, 2, 2, 2, 2 }, /* 5.5 Mb */
1d9d06a2 181 [3] = { RC_ALL, WLAN_RC_PHY_CCK, 11000,
aaa41ec4 182 8100, 3, 22, 3, 3, 3, 3 }, /* 11 Mb */
1d9d06a2 183 [4] = { RC_INVALID, WLAN_RC_PHY_OFDM, 6000,
aaa41ec4 184 5400, 4, 12, 4, 4, 4, 4 }, /* 6 Mb */
1d9d06a2 185 [5] = { RC_INVALID, WLAN_RC_PHY_OFDM, 9000,
aaa41ec4 186 7800, 5, 18, 4, 5, 5, 5 }, /* 9 Mb */
1d9d06a2 187 [6] = { RC_L_SDT, WLAN_RC_PHY_OFDM, 12000,
aaa41ec4 188 10100, 6, 24, 6, 6, 6, 6 }, /* 12 Mb */
1d9d06a2 189 [7] = { RC_L_SDT, WLAN_RC_PHY_OFDM, 18000,
aaa41ec4 190 14100, 7, 36, 6, 7, 7, 7 }, /* 18 Mb */
1d9d06a2 191 [8] = { RC_L_SDT, WLAN_RC_PHY_OFDM, 24000,
aaa41ec4 192 17700, 8, 48, 8, 8, 8, 8 }, /* 24 Mb */
1d9d06a2 193 [9] = { RC_L_SDT, WLAN_RC_PHY_OFDM, 36000,
aaa41ec4 194 23700, 9, 72, 8, 9, 9, 9 }, /* 36 Mb */
1d9d06a2 195 [10] = { RC_L_SDT, WLAN_RC_PHY_OFDM, 48000,
aaa41ec4 196 27400, 10, 96, 8, 10, 10, 10 }, /* 48 Mb */
1d9d06a2 197 [11] = { RC_L_SDT, WLAN_RC_PHY_OFDM, 54000,
aaa41ec4 198 30900, 11, 108, 8, 11, 11, 11 }, /* 54 Mb */
1d9d06a2 199 [12] = { RC_INVALID, WLAN_RC_PHY_HT_20_SS, 6500,
aaa41ec4 200 6400, 0, 0, 4, 42, 12, 42 }, /* 6.5 Mb */
1d9d06a2 201 [13] = { RC_HT_SDT_20, WLAN_RC_PHY_HT_20_SS, 13000,
aaa41ec4 202 12700, 1, 1, 6, 43, 13, 43 }, /* 13 Mb */
1d9d06a2 203 [14] = { RC_HT_SDT_20, WLAN_RC_PHY_HT_20_SS, 19500,
aaa41ec4 204 18800, 2, 2, 6, 44, 14, 44 }, /* 19.5 Mb*/
1d9d06a2 205 [15] = { RC_HT_SD_20, WLAN_RC_PHY_HT_20_SS, 26000,
aaa41ec4 206 25000, 3, 3, 8, 45, 15, 45 }, /* 26 Mb */
1d9d06a2 207 [16] = { RC_HT_SD_20, WLAN_RC_PHY_HT_20_SS, 39000,
aaa41ec4 208 36700, 4, 4, 8, 46, 16, 46 }, /* 39 Mb */
1d9d06a2 209 [17] = { RC_HT_S_20, WLAN_RC_PHY_HT_20_SS, 52000,
aaa41ec4 210 48100, 5, 5, 8, 47, 17, 47 }, /* 52 Mb */
1d9d06a2 211 [18] = { RC_HT_S_20, WLAN_RC_PHY_HT_20_SS, 58500,
aaa41ec4 212 53500, 6, 6, 8, 48, 18, 48 }, /* 58.5 Mb */
1d9d06a2 213 [19] = { RC_HT_S_20, WLAN_RC_PHY_HT_20_SS, 65000,
aaa41ec4 214 59000, 7, 7, 8, 49, 20, 50 }, /* 65 Mb */
1d9d06a2 215 [20] = { RC_HT_S_20, WLAN_RC_PHY_HT_20_SS_HGI, 72200,
aaa41ec4 216 65400, 7, 7, 8, 49, 20, 50 }, /* 65 Mb*/
1d9d06a2 217 [21] = { RC_INVALID, WLAN_RC_PHY_HT_20_DS, 13000,
aaa41ec4 218 12700, 8, 8, 4, 51, 21, 51 }, /* 13 Mb */
1d9d06a2 219 [22] = { RC_HT_T_20, WLAN_RC_PHY_HT_20_DS, 26000,
aaa41ec4 220 24800, 9, 9, 6, 52, 22, 52 }, /* 26 Mb */
1d9d06a2 221 [23] = { RC_HT_T_20, WLAN_RC_PHY_HT_20_DS, 39000,
aaa41ec4 222 36600, 10, 10, 6, 53, 23, 53 }, /* 39 Mb */
1d9d06a2 223 [24] = { RC_HT_DT_20, WLAN_RC_PHY_HT_20_DS, 52000,
aaa41ec4 224 48100, 11, 11, 8, 54, 24, 54 }, /* 52 Mb */
1d9d06a2 225 [25] = { RC_HT_DT_20, WLAN_RC_PHY_HT_20_DS, 78000,
aaa41ec4 226 69500, 12, 12, 8, 55, 25, 55 }, /* 78 Mb */
1d9d06a2 227 [26] = { RC_HT_DT_20, WLAN_RC_PHY_HT_20_DS, 104000,
aaa41ec4 228 89500, 13, 13, 8, 56, 26, 56 }, /* 104 Mb */
1d9d06a2 229 [27] = { RC_HT_DT_20, WLAN_RC_PHY_HT_20_DS, 117000,
aaa41ec4 230 98900, 14, 14, 8, 57, 27, 57 }, /* 117 Mb */
1d9d06a2 231 [28] = { RC_HT_DT_20, WLAN_RC_PHY_HT_20_DS, 130000,
aaa41ec4 232 108300, 15, 15, 8, 58, 29, 59 }, /* 130 Mb */
1d9d06a2 233 [29] = { RC_HT_DT_20, WLAN_RC_PHY_HT_20_DS_HGI, 144400,
aaa41ec4 234 120000, 15, 15, 8, 58, 29, 59 }, /* 144.4 Mb */
1d9d06a2 235 [30] = { RC_INVALID, WLAN_RC_PHY_HT_20_TS, 19500,
aaa41ec4 236 17400, 16, 16, 4, 60, 30, 60 }, /* 19.5 Mb */
1d9d06a2 237 [31] = { RC_INVALID, WLAN_RC_PHY_HT_20_TS, 39000,
aaa41ec4 238 35100, 17, 17, 6, 61, 31, 61 }, /* 39 Mb */
1d9d06a2 239 [32] = { RC_INVALID, WLAN_RC_PHY_HT_20_TS, 58500,
aaa41ec4 240 52600, 18, 18, 6, 62, 32, 62 }, /* 58.5 Mb */
1d9d06a2 241 [33] = { RC_INVALID, WLAN_RC_PHY_HT_20_TS, 78000,
aaa41ec4 242 70400, 19, 19, 8, 63, 33, 63 }, /* 78 Mb */
1d9d06a2 243 [34] = { RC_INVALID, WLAN_RC_PHY_HT_20_TS, 117000,
aaa41ec4 244 104900, 20, 20, 8, 64, 35, 65 }, /* 117 Mb */
1d9d06a2 245 [35] = { RC_INVALID, WLAN_RC_PHY_HT_20_TS_HGI, 130000,
aaa41ec4 246 115800, 20, 20, 8, 64, 35, 65 }, /* 130 Mb */
1d9d06a2 247 [36] = { RC_HT_T_20, WLAN_RC_PHY_HT_20_TS, 156000,
aaa41ec4 248 137200, 21, 21, 8, 66, 37, 67 }, /* 156 Mb */
1d9d06a2 249 [37] = { RC_HT_T_20, WLAN_RC_PHY_HT_20_TS_HGI, 173300,
aaa41ec4 250 151100, 21, 21, 8, 66, 37, 67 }, /* 173.3 Mb */
1d9d06a2 251 [38] = { RC_HT_T_20, WLAN_RC_PHY_HT_20_TS, 175500,
aaa41ec4 252 152800, 22, 22, 8, 68, 39, 69 }, /* 175.5 Mb */
1d9d06a2 253 [39] = { RC_HT_T_20, WLAN_RC_PHY_HT_20_TS_HGI, 195000,
aaa41ec4 254 168400, 22, 22, 8, 68, 39, 69 }, /* 195 Mb */
1d9d06a2 255 [40] = { RC_HT_T_20, WLAN_RC_PHY_HT_20_TS, 195000,
aaa41ec4 256 168400, 23, 23, 8, 70, 41, 71 }, /* 195 Mb */
1d9d06a2 257 [41] = { RC_HT_T_20, WLAN_RC_PHY_HT_20_TS_HGI, 216700,
aaa41ec4 258 185000, 23, 23, 8, 70, 41, 71 }, /* 216.7 Mb */
1d9d06a2 259 [42] = { RC_HT_SDT_40, WLAN_RC_PHY_HT_40_SS, 13500,
aaa41ec4 260 13200, 0, 0, 8, 42, 42, 42 }, /* 13.5 Mb */
1d9d06a2 261 [43] = { RC_HT_SDT_40, WLAN_RC_PHY_HT_40_SS, 27500,
aaa41ec4 262 25900, 1, 1, 8, 43, 43, 43 }, /* 27.0 Mb */
1d9d06a2 263 [44] = { RC_HT_SDT_40, WLAN_RC_PHY_HT_40_SS, 40500,
aaa41ec4 264 38600, 2, 2, 8, 44, 44, 44 }, /* 40.5 Mb */
1d9d06a2 265 [45] = { RC_HT_SD_40, WLAN_RC_PHY_HT_40_SS, 54000,
aaa41ec4 266 49800, 3, 3, 8, 45, 45, 45 }, /* 54 Mb */
1d9d06a2 267 [46] = { RC_HT_SD_40, WLAN_RC_PHY_HT_40_SS, 81500,
aaa41ec4 268 72200, 4, 4, 8, 46, 46, 46 }, /* 81 Mb */
1d9d06a2 269 [47] = { RC_HT_S_40 , WLAN_RC_PHY_HT_40_SS, 108000,
aaa41ec4 270 92900, 5, 5, 8, 47, 47, 47 }, /* 108 Mb */
1d9d06a2 271 [48] = { RC_HT_S_40, WLAN_RC_PHY_HT_40_SS, 121500,
aaa41ec4 272 102700, 6, 6, 8, 48, 48, 48 }, /* 121.5 Mb */
1d9d06a2 273 [49] = { RC_HT_S_40, WLAN_RC_PHY_HT_40_SS, 135000,
aaa41ec4 274 112000, 7, 7, 8, 49, 50, 50 }, /* 135 Mb */
1d9d06a2 275 [50] = { RC_HT_S_40, WLAN_RC_PHY_HT_40_SS_HGI, 150000,
aaa41ec4 276 122000, 7, 7, 8, 49, 50, 50 }, /* 150 Mb */
1d9d06a2 277 [51] = { RC_INVALID, WLAN_RC_PHY_HT_40_DS, 27000,
aaa41ec4 278 25800, 8, 8, 8, 51, 51, 51 }, /* 27 Mb */
1d9d06a2 279 [52] = { RC_HT_T_40, WLAN_RC_PHY_HT_40_DS, 54000,
aaa41ec4 280 49800, 9, 9, 8, 52, 52, 52 }, /* 54 Mb */
1d9d06a2 281 [53] = { RC_HT_T_40, WLAN_RC_PHY_HT_40_DS, 81000,
aaa41ec4 282 71900, 10, 10, 8, 53, 53, 53 }, /* 81 Mb */
1d9d06a2 283 [54] = { RC_HT_DT_40, WLAN_RC_PHY_HT_40_DS, 108000,
aaa41ec4 284 92500, 11, 11, 8, 54, 54, 54 }, /* 108 Mb */
1d9d06a2 285 [55] = { RC_HT_DT_40, WLAN_RC_PHY_HT_40_DS, 162000,
aaa41ec4 286 130300, 12, 12, 8, 55, 55, 55 }, /* 162 Mb */
1d9d06a2 287 [56] = { RC_HT_DT_40, WLAN_RC_PHY_HT_40_DS, 216000,
aaa41ec4 288 162800, 13, 13, 8, 56, 56, 56 }, /* 216 Mb */
1d9d06a2 289 [57] = { RC_HT_DT_40, WLAN_RC_PHY_HT_40_DS, 243000,
aaa41ec4 290 178200, 14, 14, 8, 57, 57, 57 }, /* 243 Mb */
1d9d06a2 291 [58] = { RC_HT_DT_40, WLAN_RC_PHY_HT_40_DS, 270000,
aaa41ec4 292 192100, 15, 15, 8, 58, 59, 59 }, /* 270 Mb */
1d9d06a2 293 [59] = { RC_HT_DT_40, WLAN_RC_PHY_HT_40_DS_HGI, 300000,
aaa41ec4 294 207000, 15, 15, 8, 58, 59, 59 }, /* 300 Mb */
1d9d06a2 295 [60] = { RC_INVALID, WLAN_RC_PHY_HT_40_TS, 40500,
aaa41ec4 296 36100, 16, 16, 8, 60, 60, 60 }, /* 40.5 Mb */
1d9d06a2 297 [61] = { RC_INVALID, WLAN_RC_PHY_HT_40_TS, 81000,
aaa41ec4 298 72900, 17, 17, 8, 61, 61, 61 }, /* 81 Mb */
1d9d06a2 299 [62] = { RC_INVALID, WLAN_RC_PHY_HT_40_TS, 121500,
aaa41ec4 300 108300, 18, 18, 8, 62, 62, 62 }, /* 121.5 Mb */
1d9d06a2 301 [63] = { RC_INVALID, WLAN_RC_PHY_HT_40_TS, 162000,
aaa41ec4 302 142000, 19, 19, 8, 63, 63, 63 }, /* 162 Mb */
1d9d06a2 303 [64] = { RC_INVALID, WLAN_RC_PHY_HT_40_TS, 243000,
aaa41ec4 304 205100, 20, 20, 8, 64, 65, 65 }, /* 243 Mb */
1d9d06a2 305 [65] = { RC_INVALID, WLAN_RC_PHY_HT_40_TS_HGI, 270000,
7a826652 306 224700, 20, 20, 8, 64, 65, 65 }, /* 270 Mb */
1d9d06a2 307 [66] = { RC_HT_T_40, WLAN_RC_PHY_HT_40_TS, 324000,
aaa41ec4 308 263100, 21, 21, 8, 66, 67, 67 }, /* 324 Mb */
1d9d06a2 309 [67] = { RC_HT_T_40, WLAN_RC_PHY_HT_40_TS_HGI, 360000,
aaa41ec4 310 288000, 21, 21, 8, 66, 67, 67 }, /* 360 Mb */
1d9d06a2 311 [68] = { RC_HT_T_40, WLAN_RC_PHY_HT_40_TS, 364500,
aaa41ec4 312 290700, 22, 22, 8, 68, 69, 69 }, /* 364.5 Mb */
1d9d06a2 313 [69] = { RC_HT_T_40, WLAN_RC_PHY_HT_40_TS_HGI, 405000,
aaa41ec4 314 317200, 22, 22, 8, 68, 69, 69 }, /* 405 Mb */
1d9d06a2 315 [70] = { RC_HT_T_40, WLAN_RC_PHY_HT_40_TS, 405000,
aaa41ec4 316 317200, 23, 23, 8, 70, 71, 71 }, /* 405 Mb */
1d9d06a2 317 [71] = { RC_HT_T_40, WLAN_RC_PHY_HT_40_TS_HGI, 450000,
aaa41ec4 318 346400, 23, 23, 8, 70, 71, 71 }, /* 450 Mb */
1fe8234a 319 },
f078f209 320 50, /* probe interval */
f078f209
LR		 321 WLAN_RC_HT_FLAG, /* Phy rates allowed initially */
322};
323
4f0fc7c3 324static const struct ath_rate_table ar5416_11a_ratetable = {
f078f209 325 8,
545750d3 326 0,
f078f209 327 {
1d9d06a2 328 { RC_L_SDT, WLAN_RC_PHY_OFDM, 6000, /* 6 Mb */
aaa41ec4 329 5400, 0, 12, 0},
1d9d06a2 330 { RC_L_SDT, WLAN_RC_PHY_OFDM, 9000, /* 9 Mb */
aaa41ec4 331 7800, 1, 18, 0},
1d9d06a2 332 { RC_L_SDT, WLAN_RC_PHY_OFDM, 12000, /* 12 Mb */
aaa41ec4 333 10000, 2, 24, 2},
1d9d06a2 334 { RC_L_SDT, WLAN_RC_PHY_OFDM, 18000, /* 18 Mb */
aaa41ec4 335 13900, 3, 36, 2},
1d9d06a2 336 { RC_L_SDT, WLAN_RC_PHY_OFDM, 24000, /* 24 Mb */
aaa41ec4 337 17300, 4, 48, 4},
1d9d06a2 338 { RC_L_SDT, WLAN_RC_PHY_OFDM, 36000, /* 36 Mb */
aaa41ec4 339 23000, 5, 72, 4},
1d9d06a2 340 { RC_L_SDT, WLAN_RC_PHY_OFDM, 48000, /* 48 Mb */
aaa41ec4 341 27400, 6, 96, 4},
1d9d06a2 342 { RC_L_SDT, WLAN_RC_PHY_OFDM, 54000, /* 54 Mb */
aaa41ec4 343 29300, 7, 108, 4},
f078f209
LR		 344 },
345 50, /* probe interval */
f078f209
LR		 346 0, /* Phy rates allowed initially */
347};
348
4f0fc7c3 349static const struct ath_rate_table ar5416_11g_ratetable = {
f078f209 350 12,
545750d3 351 0,
f078f209 352 {
1d9d06a2 353 { RC_L_SDT, WLAN_RC_PHY_CCK, 1000, /* 1 Mb */
aaa41ec4 354 900, 0, 2, 0},
1d9d06a2 355 { RC_L_SDT, WLAN_RC_PHY_CCK, 2000, /* 2 Mb */
aaa41ec4 356 1900, 1, 4, 1},
1d9d06a2 357 { RC_L_SDT, WLAN_RC_PHY_CCK, 5500, /* 5.5 Mb */
aaa41ec4 358 4900, 2, 11, 2},
1d9d06a2 359 { RC_L_SDT, WLAN_RC_PHY_CCK, 11000, /* 11 Mb */
aaa41ec4 360 8100, 3, 22, 3},
f63b340d 361 { RC_INVALID, WLAN_RC_PHY_OFDM, 6000, /* 6 Mb */
aaa41ec4 362 5400, 4, 12, 4},
f63b340d 363 { RC_INVALID, WLAN_RC_PHY_OFDM, 9000, /* 9 Mb */
aaa41ec4 364 7800, 5, 18, 4},
1d9d06a2 365 { RC_L_SDT, WLAN_RC_PHY_OFDM, 12000, /* 12 Mb */
aaa41ec4 366 10000, 6, 24, 6},
1d9d06a2 367 { RC_L_SDT, WLAN_RC_PHY_OFDM, 18000, /* 18 Mb */
aaa41ec4 368 13900, 7, 36, 6},
1d9d06a2 369 { RC_L_SDT, WLAN_RC_PHY_OFDM, 24000, /* 24 Mb */
aaa41ec4 370 17300, 8, 48, 8},
1d9d06a2 371 { RC_L_SDT, WLAN_RC_PHY_OFDM, 36000, /* 36 Mb */
aaa41ec4 372 23000, 9, 72, 8},
1d9d06a2 373 { RC_L_SDT, WLAN_RC_PHY_OFDM, 48000, /* 48 Mb */
aaa41ec4 374 27400, 10, 96, 8},
1d9d06a2 375 { RC_L_SDT, WLAN_RC_PHY_OFDM, 54000, /* 54 Mb */
aaa41ec4 376 29300, 11, 108, 8},
f078f209
LR		 377 },
378 50, /* probe interval */
f078f209
LR		 379 0, /* Phy rates allowed initially */
380};
381
545750d3 382static int ath_rc_get_rateindex(const struct ath_rate_table *rate_table,
9dff3870
MSS		 383 struct ieee80211_tx_rate *rate)
384{
385 int rix = 0, i = 0;
386 static const int mcs_rix_off[] = { 7, 15, 20, 21, 22, 23 };
387
388 if (!(rate->flags & IEEE80211_TX_RC_MCS))
389 return rate->idx;
390
391 while (i < ARRAY_SIZE(mcs_rix_off) && rate->idx > mcs_rix_off[i]) {
392 rix++; i++;
393 }
394
395 rix += rate->idx + rate_table->mcs_start;
396
397 if ((rate->flags & IEEE80211_TX_RC_40_MHZ_WIDTH) &&
398 (rate->flags & IEEE80211_TX_RC_SHORT_GI))
399 rix = rate_table->info[rix].ht_index;
400 else if (rate->flags & IEEE80211_TX_RC_SHORT_GI)
401 rix = rate_table->info[rix].sgi_index;
402 else if (rate->flags & IEEE80211_TX_RC_40_MHZ_WIDTH)
403 rix = rate_table->info[rix].cw40index;
404
405 return rix;
406}
545750d3 407
ea2771f6 408static void ath_rc_sort_validrates(struct ath_rate_priv *ath_rc_priv)
f078f209 409{
ea2771f6 410 const struct ath_rate_table *rate_table = ath_rc_priv->rate_table;
f078f209
LR		 411 u8 i, j, idx, idx_next;
412
256b7759 413 for (i = ath_rc_priv->max_valid_rate - 1; i > 0; i--) {
f078f209 414 for (j = 0; j <= i-1; j++) {
256b7759
S		 415 idx = ath_rc_priv->valid_rate_index[j];
416 idx_next = ath_rc_priv->valid_rate_index[j+1];
f078f209
LR		 417
418 if (rate_table->info[idx].ratekbps >
419 rate_table->info[idx_next].ratekbps) {
256b7759
S		 420 ath_rc_priv->valid_rate_index[j] = idx_next;
421 ath_rc_priv->valid_rate_index[j+1] = idx;
f078f209
LR		 422 }
423 }
424 }
425}
426
2ae79d52 427static inline void ath_rc_set_valid_rate_idx(struct ath_rate_priv *ath_rc_priv,
f078f209
LR		 428 u8 index, int valid_tx_rate)
429{
9680e8a3 430 BUG_ON(index > ath_rc_priv->rate_table_size);
f63b340d 431 ath_rc_priv->valid_rate_index[index] = !!valid_tx_rate;
f078f209
LR		 432}
433
4f0fc7c3
LR		 434static inline
435int ath_rc_get_nextvalid_txrate(const struct ath_rate_table *rate_table,
436 struct ath_rate_priv *ath_rc_priv,
437 u8 cur_valid_txrate,
438 u8 *next_idx)
f078f209
LR		 439{
440 u8 i;
441
256b7759
S		 442 for (i = 0; i < ath_rc_priv->max_valid_rate - 1; i++) {
443 if (ath_rc_priv->valid_rate_index[i] == cur_valid_txrate) {
444 *next_idx = ath_rc_priv->valid_rate_index[i+1];
46d14a58 445 return 1;
f078f209
LR		 446 }
447 }
448
449 /* No more valid rates */
450 *next_idx = 0;
2c5a744d 451
46d14a58 452 return 0;
f078f209
LR		 453}
454
455/* Return true only for single stream */
456
457static int ath_rc_valid_phyrate(u32 phy, u32 capflag, int ignore_cw)
458{
b657eade 459 if (WLAN_RC_PHY_HT(phy) && !(capflag & WLAN_RC_HT_FLAG))
46d14a58 460 return 0;
f078f209 461 if (WLAN_RC_PHY_DS(phy) && !(capflag & WLAN_RC_DS_FLAG))
46d14a58 462 return 0;
1d9d06a2
SB		 463 if (WLAN_RC_PHY_TS(phy) && !(capflag & WLAN_RC_TS_FLAG))
464 return 0;
f078f209 465 if (WLAN_RC_PHY_SGI(phy) && !(capflag & WLAN_RC_SGI_FLAG))
46d14a58 466 return 0;
f078f209
LR		 467 if (!ignore_cw && WLAN_RC_PHY_HT(phy))
468 if (WLAN_RC_PHY_40(phy) && !(capflag & WLAN_RC_40_FLAG))
46d14a58 469 return 0;
46d14a58 470 return 1;
f078f209
LR		 471}
472
473static inline int
39448b0a
LR		 474ath_rc_get_lower_rix(const struct ath_rate_table *rate_table,
475 struct ath_rate_priv *ath_rc_priv,
476 u8 cur_valid_txrate, u8 *next_idx)
f078f209
LR		 477{
478 int8_t i;
479
256b7759
S		 480 for (i = 1; i < ath_rc_priv->max_valid_rate ; i++) {
481 if (ath_rc_priv->valid_rate_index[i] == cur_valid_txrate) {
482 *next_idx = ath_rc_priv->valid_rate_index[i-1];
46d14a58 483 return 1;
f078f209
LR		 484 }
485 }
2c5a744d 486
46d14a58 487 return 0;
f078f209
LR		 488}
489
ea2771f6 490static u8 ath_rc_init_validrates(struct ath_rate_priv *ath_rc_priv)
f078f209 491{
ea2771f6 492 const struct ath_rate_table *rate_table = ath_rc_priv->rate_table;
f078f209 493 u8 i, hi = 0;
f078f209 494
f078f209 495 for (i = 0; i < rate_table->rate_cnt; i++) {
f63b340d 496 if (rate_table->info[i].rate_flags & RC_LEGACY) {
f078f209
LR		 497 u32 phy = rate_table->info[i].phy;
498 u8 valid_rate_count = 0;
499
ea2771f6 500 if (!ath_rc_valid_phyrate(phy, ath_rc_priv->ht_cap, 0))
f078f209
LR		 501 continue;
502
256b7759 503 valid_rate_count = ath_rc_priv->valid_phy_ratecnt[phy];
f078f209 504
256b7759
S		 505 ath_rc_priv->valid_phy_rateidx[phy][valid_rate_count] = i;
506 ath_rc_priv->valid_phy_ratecnt[phy] += 1;
2ae79d52 507 ath_rc_set_valid_rate_idx(ath_rc_priv, i, 1);
f63b340d 508 hi = i;
f078f209
LR		 509 }
510 }
2c5a744d 511
f078f209
LR		 512 return hi;
513}
514
ea2771f6 515static u8 ath_rc_setvalid_rates(struct ath_rate_priv *ath_rc_priv)
f078f209 516{
ea2771f6
SM		 517 const struct ath_rate_table *rate_table = ath_rc_priv->rate_table;
518 struct ath_rateset *rateset = &ath_rc_priv->neg_rates;
c05ea151
SM		 519 u32 phy, capflag = ath_rc_priv->ht_cap;
520 u16 rate_flags;
521 u8 i, j, hi = 0, rate, dot11rate, valid_rate_count;
f078f209 522
f078f209
LR		 523 for (i = 0; i < rateset->rs_nrates; i++) {
524 for (j = 0; j < rate_table->rate_cnt; j++) {
c05ea151
SM		 525 phy = rate_table->info[j].phy;
526 rate_flags = rate_table->info[j].rate_flags;
527 rate = rateset->rs_rates[i];
528 dot11rate = rate_table->info[j].dot11rate;
529
530 if (rate != dot11rate
531 || ((rate_flags & WLAN_RC_CAP_MODE(capflag)) !=
532 WLAN_RC_CAP_MODE(capflag))
533 || !(rate_flags & WLAN_RC_CAP_STREAM(capflag))
534 || WLAN_RC_PHY_HT(phy))
535 continue;
536
537 if (!ath_rc_valid_phyrate(phy, capflag, 0))
538 continue;
539
540 valid_rate_count = ath_rc_priv->valid_phy_ratecnt[phy];
541 ath_rc_priv->valid_phy_rateidx[phy][valid_rate_count] = j;
542 ath_rc_priv->valid_phy_ratecnt[phy] += 1;
543 ath_rc_set_valid_rate_idx(ath_rc_priv, j, 1);
544 hi = max(hi, j);
f078f209
LR		 545 }
546 }
2c5a744d 547
f078f209
LR		 548 return hi;
549}
550
ea2771f6 551static u8 ath_rc_setvalid_htrates(struct ath_rate_priv *ath_rc_priv)
f078f209 552{
ea2771f6
SM		 553 const struct ath_rate_table *rate_table = ath_rc_priv->rate_table;
554 struct ath_rateset *rateset = &ath_rc_priv->neg_ht_rates;
dacde357
SM		 555 u32 phy, capflag = ath_rc_priv->ht_cap;
556 u16 rate_flags;
557 u8 i, j, hi = 0, rate, dot11rate, valid_rate_count;
f078f209 558
2c5a744d 559 for (i = 0; i < rateset->rs_nrates; i++) {
f078f209 560 for (j = 0; j < rate_table->rate_cnt; j++) {
dacde357
SM		 561 phy = rate_table->info[j].phy;
562 rate_flags = rate_table->info[j].rate_flags;
563 rate = rateset->rs_rates[i];
564 dot11rate = rate_table->info[j].dot11rate;
f078f209 565
545750d3 566 if ((rate != dot11rate) || !WLAN_RC_PHY_HT(phy) ||
f63b340d
SB		 567 !(rate_flags & WLAN_RC_CAP_STREAM(capflag)) ||
568 !WLAN_RC_PHY_HT_VALID(rate_flags, capflag))
f078f209
LR		 569 continue;
570
46d14a58 571 if (!ath_rc_valid_phyrate(phy, capflag, 0))
f078f209
LR		 572 continue;
573
dacde357
SM		 574 valid_rate_count = ath_rc_priv->valid_phy_ratecnt[phy];
575 ath_rc_priv->valid_phy_rateidx[phy][valid_rate_count] = j;
256b7759 576 ath_rc_priv->valid_phy_ratecnt[phy] += 1;
2ae79d52 577 ath_rc_set_valid_rate_idx(ath_rc_priv, j, 1);
f6351d48 578 hi = max(hi, j);
f078f209
LR		 579 }
580 }
f078f209 581
2c5a744d 582 return hi;
f078f209
LR		 583}
584
201c3b41
LR		 585/* Finds the highest rate index we can use */
586static u8 ath_rc_get_highest_rix(struct ath_softc *sc,
587 struct ath_rate_priv *ath_rc_priv,
588 const struct ath_rate_table *rate_table,
a35e2780
RM		 589 int *is_probing,
590 bool legacy)
f078f209 591{
39a4cafe 592 u32 best_thruput, this_thruput, now_msec;
f078f209 593 u8 rate, next_rate, best_rate, maxindex, minindex;
39a4cafe 594 int8_t index = 0;
f078f209
LR		 595
596 now_msec = jiffies_to_msecs(jiffies);
39a4cafe 597 *is_probing = 0;
f078f209 598 best_thruput = 0;
256b7759 599 maxindex = ath_rc_priv->max_valid_rate-1;
f078f209
LR		 600 minindex = 0;
601 best_rate = minindex;
602
603 /*
604 * Try the higher rate first. It will reduce memory moving time
605 * if we have very good channel characteristics.
606 */
607 for (index = maxindex; index >= minindex ; index--) {
608 u8 per_thres;
609
256b7759 610 rate = ath_rc_priv->valid_rate_index[index];
a35e2780
RM		 611 if (legacy && !(rate_table->info[rate].rate_flags & RC_LEGACY))
612 continue;
256b7759 613 if (rate > ath_rc_priv->rate_max_phy)
f078f209
LR		 614 continue;
615
616 /*
617 * For TCP the average collision rate is around 11%,
618 * so we ignore PERs less than this. This is to
619 * prevent the rate we are currently using (whose
620 * PER might be in the 10-15 range because of TCP
621 * collisions) looking worse than the next lower
622 * rate whose PER has decayed close to 0. If we
623 * used to next lower rate, its PER would grow to
624 * 10-15 and we would be worse off then staying
625 * at the current rate.
626 */
922bac60 627 per_thres = ath_rc_priv->per[rate];
f078f209
LR		 628 if (per_thres < 12)
629 per_thres = 12;
630
631 this_thruput = rate_table->info[rate].user_ratekbps *
632 (100 - per_thres);
633
634 if (best_thruput <= this_thruput) {
635 best_thruput = this_thruput;
636 best_rate = rate;
637 }
638 }
639
640 rate = best_rate;
f078f209
LR		 641
642 /*
643 * Must check the actual rate (ratekbps) to account for
644 * non-monoticity of 11g's rate table
645 */
646
3900898c 647 if (rate >= ath_rc_priv->rate_max_phy) {
256b7759 648 rate = ath_rc_priv->rate_max_phy;
f078f209
LR		 649
650 /* Probe the next allowed phy state */
f078f209 651 if (ath_rc_get_nextvalid_txrate(rate_table,
3900898c 652 ath_rc_priv, rate, &next_rate) &&
256b7759 653 (now_msec - ath_rc_priv->probe_time >
f078f209 654 rate_table->probe_interval) &&
256b7759 655 (ath_rc_priv->hw_maxretry_pktcnt >= 1)) {
f078f209 656 rate = next_rate;
256b7759
S		 657 ath_rc_priv->probe_rate = rate;
658 ath_rc_priv->probe_time = now_msec;
659 ath_rc_priv->hw_maxretry_pktcnt = 0;
46d14a58 660 *is_probing = 1;
f078f209
LR		 661 }
662 }
663
256b7759
S		 664 if (rate > (ath_rc_priv->rate_table_size - 1))
665 rate = ath_rc_priv->rate_table_size - 1;
f078f209 666
1d9d06a2
SB		 667 if (RC_TS_ONLY(rate_table->info[rate].rate_flags) &&
668 (ath_rc_priv->ht_cap & WLAN_RC_TS_FLAG))
669 return rate;
670
671 if (RC_DS_OR_LATER(rate_table->info[rate].rate_flags) &&
672 (ath_rc_priv->ht_cap & (WLAN_RC_DS_FLAG | WLAN_RC_TS_FLAG)))
e43419f9
LR		 673 return rate;
674
f63b340d 675 if (RC_SS_OR_LEGACY(rate_table->info[rate].rate_flags))
e43419f9
LR		 676 return rate;
677
678 /* This should not happen */
8149415e 679 WARN_ON_ONCE(1);
e43419f9
LR		 680
681 rate = ath_rc_priv->valid_rate_index[0];
f078f209
LR		 682
683 return rate;
684}
685
4f0fc7c3 686static void ath_rc_rate_set_series(const struct ath_rate_table *rate_table,
a8efee4f 687 struct ieee80211_tx_rate *rate,
c89424df 688 struct ieee80211_tx_rate_control *txrc,
2c5a744d 689 u8 tries, u8 rix, int rtsctsenable)
f078f209 690{
a8efee4f 691 rate->count = tries;
545750d3 692 rate->idx = rate_table->info[rix].ratecode;
a8efee4f 693
c89424df
S		 694 if (txrc->short_preamble)
695 rate->flags |= IEEE80211_TX_RC_USE_SHORT_PREAMBLE;
696 if (txrc->rts || rtsctsenable)
a8efee4f 697 rate->flags |= IEEE80211_TX_RC_USE_RTS_CTS;
545750d3
FF		 698
699 if (WLAN_RC_PHY_HT(rate_table->info[rix].phy)) {
a8efee4f 700 rate->flags |= IEEE80211_TX_RC_MCS;
41e2b05b
RM		 701 if (WLAN_RC_PHY_40(rate_table->info[rix].phy) &&
702 conf_is_ht40(&txrc->hw->conf))
545750d3
FF		 703 rate->flags |= IEEE80211_TX_RC_40_MHZ_WIDTH;
704 if (WLAN_RC_PHY_SGI(rate_table->info[rix].phy))
705 rate->flags |= IEEE80211_TX_RC_SHORT_GI;
706 }
f078f209
LR		 707}
708
c89424df 709static void ath_rc_rate_set_rtscts(struct ath_softc *sc,
4f0fc7c3 710 const struct ath_rate_table *rate_table,
c89424df
S		 711 struct ieee80211_tx_info *tx_info)
712{
713 struct ieee80211_tx_rate *rates = tx_info->control.rates;
714 int i = 0, rix = 0, cix, enable_g_protection = 0;
715
716 /* get the cix for the lowest valid rix */
717 for (i = 3; i >= 0; i--) {
718 if (rates[i].count && (rates[i].idx >= 0)) {
545750d3 719 rix = ath_rc_get_rateindex(rate_table, &rates[i]);
c89424df
S		 720 break;
721 }
722 }
723 cix = rate_table->info[rix].ctrl_rate;
724
725 /* All protection frames are transmited at 2Mb/s for 802.11g,
726 * otherwise we transmit them at 1Mb/s */
727 if (sc->hw->conf.channel->band == IEEE80211_BAND_2GHZ &&
728 !conf_is_ht(&sc->hw->conf))
729 enable_g_protection = 1;
730
731 /*
732 * If 802.11g protection is enabled, determine whether to use RTS/CTS or
733 * just CTS. Note that this is only done for OFDM/HT unicast frames.
734 */
d47a61aa
SM		 735 if ((tx_info->control.vif &&
736 tx_info->control.vif->bss_conf.use_cts_prot) &&
c89424df
S		 737 (rate_table->info[rix].phy == WLAN_RC_PHY_OFDM ||
738 WLAN_RC_PHY_HT(rate_table->info[rix].phy))) {
739 rates[0].flags |= IEEE80211_TX_RC_USE_CTS_PROTECT;
740 cix = rate_table->info[enable_g_protection].ctrl_rate;
741 }
742
743 tx_info->control.rts_cts_rate_idx = cix;
744}
745
e25739a1
LR		 746static void ath_get_rate(void *priv, struct ieee80211_sta *sta, void *priv_sta,
747 struct ieee80211_tx_rate_control *txrc)
f078f209 748{
e25739a1
LR		 749 struct ath_softc *sc = priv;
750 struct ath_rate_priv *ath_rc_priv = priv_sta;
4f0fc7c3 751 const struct ath_rate_table *rate_table;
3900898c
S		 752 struct sk_buff *skb = txrc->skb;
753 struct ieee80211_tx_info *tx_info = IEEE80211_SKB_CB(skb);
a8efee4f 754 struct ieee80211_tx_rate *rates = tx_info->control.rates;
c89424df
S		 755 struct ieee80211_hdr *hdr = (struct ieee80211_hdr *)skb->data;
756 __le16 fc = hdr->frame_control;
cec429dd 757 u8 try_per_rate, i = 0, rix;
3900898c 758 int is_probe = 0;
f078f209 759
e25739a1
LR		 760 if (rate_control_send_low(sta, priv_sta, txrc))
761 return;
762
dd190183
LR		 763 /*
764 * For Multi Rate Retry we use a different number of
765 * retry attempt counts. This ends up looking like this:
766 *
65896510
FF		 767 * MRR[0] = 4
768 * MRR[1] = 4
769 * MRR[2] = 4
770 * MRR[3] = 8
dd190183
LR		 771 *
772 */
65896510 773 try_per_rate = 4;
dd190183 774
4e990018 775 rate_table = ath_rc_priv->rate_table;
a35e2780
RM		 776 rix = ath_rc_get_highest_rix(sc, ath_rc_priv, rate_table,
777 &is_probe, false);
f078f209 778
b0a33448
LR		 779 /*
780 * If we're in HT mode and both us and our peer supports LDPC.
781 * We don't need to check our own device's capabilities as our own
782 * ht capabilities would have already been intersected with our peer's.
783 */
784 if (conf_is_ht(&sc->hw->conf) &&
785 (sta->ht_cap.cap & IEEE80211_HT_CAP_LDPC_CODING))
786 tx_info->flags |= IEEE80211_TX_CTL_LDPC;
787
58b5190e
FF		 788 if (conf_is_ht(&sc->hw->conf) &&
789 (sta->ht_cap.cap & IEEE80211_HT_CAP_TX_STBC))
790 tx_info->flags |= (1 << IEEE80211_TX_CTL_STBC_SHIFT);
791
3900898c 792 if (is_probe) {
f078f209
LR		 793 /* set one try for probe rates. For the
794 * probes don't enable rts */
c89424df 795 ath_rc_rate_set_series(rate_table, &rates[i++], txrc,
5c0ba62f 796 1, rix, 0);
f078f209 797
f078f209
LR		 798 /* Get the next tried/allowed rate. No RTS for the next series
799 * after the probe rate
800 */
5c0ba62f 801 ath_rc_get_lower_rix(rate_table, ath_rc_priv, rix, &rix);
c89424df 802 ath_rc_rate_set_series(rate_table, &rates[i++], txrc,
5c0ba62f 803 try_per_rate, rix, 0);
14587ce2
VT		 804
805 tx_info->flags |= IEEE80211_TX_CTL_RATE_CTRL_PROBE;
f078f209 806 } else {
25985edc 807 /* Set the chosen rate. No RTS for first series entry. */
c89424df 808 ath_rc_rate_set_series(rate_table, &rates[i++], txrc,
5c0ba62f 809 try_per_rate, rix, 0);
f078f209
LR		 810 }
811
812 /* Fill in the other rates for multirate retry */
a35e2780 813 for ( ; i < 3; i++) {
dd190183 814
5c0ba62f 815 ath_rc_get_lower_rix(rate_table, ath_rc_priv, rix, &rix);
f078f209 816 /* All other rates in the series have RTS enabled */
c89424df 817 ath_rc_rate_set_series(rate_table, &rates[i], txrc,
5c0ba62f 818 try_per_rate, rix, 1);
f078f209
LR		 819 }
820
a35e2780
RM		 821 /* Use twice the number of tries for the last MRR segment. */
822 try_per_rate = 8;
823
824 /*
cec429dd
RM		 825 * If the last rate in the rate series is MCS and has
826 * more than 80% of per thresh, then use a legacy rate
827 * as last retry to ensure that the frame is tried in both
828 * MCS and legacy rate.
a35e2780 829 */
cec429dd
RM		 830 ath_rc_get_lower_rix(rate_table, ath_rc_priv, rix, &rix);
831 if (WLAN_RC_PHY_HT(rate_table->info[rix].phy) &&
832 (ath_rc_priv->per[rix] > 45))
a35e2780
RM		 833 rix = ath_rc_get_highest_rix(sc, ath_rc_priv, rate_table,
834 &is_probe, true);
a35e2780
RM		 835
836 /* All other rates in the series have RTS enabled */
837 ath_rc_rate_set_series(rate_table, &rates[i], txrc,
838 try_per_rate, rix, 1);
f078f209
LR		 839 /*
840 * NB:Change rate series to enable aggregation when operating
841 * at lower MCS rates. When first rate in series is MCS2
842 * in HT40 @ 2.4GHz, series should look like:
843 *
844 * {MCS2, MCS1, MCS0, MCS0}.
845 *
846 * When first rate in series is MCS3 in HT20 @ 2.4GHz, series should
847 * look like:
848 *
849 * {MCS3, MCS2, MCS1, MCS1}
850 *
851 * So, set fourth rate in series to be same as third one for
852 * above conditions.
853 */
3706de6f 854 if ((sc->hw->conf.channel->band == IEEE80211_BAND_2GHZ) &&
ecf70441 855 (conf_is_ht(&sc->hw->conf))) {
40990ec0 856 u8 dot11rate = rate_table->info[rix].dot11rate;
f078f209
LR		 857 u8 phy = rate_table->info[rix].phy;
858 if (i == 4 &&
859 ((dot11rate == 2 && phy == WLAN_RC_PHY_HT_40_SS) ||
dc2222a8 860 (dot11rate == 3 && phy == WLAN_RC_PHY_HT_20_SS))) {
a8efee4f
S		 861 rates[3].idx = rates[2].idx;
862 rates[3].flags = rates[2].flags;
f078f209
LR		 863 }
864 }
c89424df
S		 865
866 /*
867 * Force hardware to use computed duration for next
868 * fragment by disabling multi-rate retry, which
869 * updates duration based on the multi-rate duration table.
870 *
871 * FIXME: Fix duration
872 */
7682a76d
LR		 873 if (ieee80211_has_morefrags(fc) ||
874 (le16_to_cpu(hdr->seq_ctrl) & IEEE80211_SCTL_FRAG)) {
c89424df
S		 875 rates[1].count = rates[2].count = rates[3].count = 0;
876 rates[1].idx = rates[2].idx = rates[3].idx = 0;
877 rates[0].count = ATH_TXMAXTRY;
878 }
879
880 /* Setup RTS/CTS */
881 ath_rc_rate_set_rtscts(sc, rate_table, tx_info);
f078f209
LR		 882}
883
0ff2b5c0 884static void ath_rc_update_per(struct ath_softc *sc,
4f0fc7c3 885 const struct ath_rate_table *rate_table,
2c5a744d 886 struct ath_rate_priv *ath_rc_priv,
827e69bf 887 struct ieee80211_tx_info *tx_info,
2c5a744d
S		 888 int tx_rate, int xretries, int retries,
889 u32 now_msec)
f078f209 890{
827e69bf 891 int count, n_bad_frames;
f078f209 892 u8 last_per;
07b2fa5a 893 static const u32 nretry_to_per_lookup[10] = {
f078f209
LR		 894 100 * 0 / 1,
895 100 * 1 / 4,
896 100 * 1 / 2,
897 100 * 3 / 4,
898 100 * 4 / 5,
899 100 * 5 / 6,
900 100 * 6 / 7,
901 100 * 7 / 8,
902 100 * 8 / 9,
903 100 * 9 / 10
904 };
905
922bac60 906 last_per = ath_rc_priv->per[tx_rate];
827e69bf 907 n_bad_frames = tx_info->status.ampdu_len - tx_info->status.ampdu_ack_len;
f078f209
LR		 908
909 if (xretries) {
f078f209 910 if (xretries == 1) {
922bac60
VT		 911 ath_rc_priv->per[tx_rate] += 30;
912 if (ath_rc_priv->per[tx_rate] > 100)
913 ath_rc_priv->per[tx_rate] = 100;
f078f209
LR		 914 } else {
915 /* xretries == 2 */
87c1687d 916 count = ARRAY_SIZE(nretry_to_per_lookup);
f078f209
LR		 917 if (retries >= count)
918 retries = count - 1;
2c5a744d 919
f078f209 920 /* new_PER = 7/8*old_PER + 1/8*(currentPER) */
922bac60 921 ath_rc_priv->per[tx_rate] =
2c5a744d 922 (u8)(last_per - (last_per >> 3) + (100 >> 3));
f078f209
LR		 923 }
924
925 /* xretries == 1 or 2 */
926
256b7759
S		 927 if (ath_rc_priv->probe_rate == tx_rate)
928 ath_rc_priv->probe_rate = 0;
f078f209 929
2c5a744d 930 } else { /* xretries == 0 */
87c1687d 931 count = ARRAY_SIZE(nretry_to_per_lookup);
f078f209
LR		 932 if (retries >= count)
933 retries = count - 1;
2c5a744d 934
827e69bf 935 if (n_bad_frames) {
dc2222a8 936 /* new_PER = 7/8*old_PER + 1/8*(currentPER)
f078f209
LR		 937 * Assuming that n_frames is not 0. The current PER
938 * from the retries is 100 * retries / (retries+1),
939 * since the first retries attempts failed, and the
940 * next one worked. For the one that worked,
941 * n_bad_frames subframes out of n_frames wored,
942 * so the PER for that part is
943 * 100 * n_bad_frames / n_frames, and it contributes
944 * 100 * n_bad_frames / (n_frames * (retries+1)) to
945 * the above PER. The expression below is a
946 * simplified version of the sum of these two terms.
947 */
827e69bf
FF		 948 if (tx_info->status.ampdu_len > 0) {
949 int n_frames, n_bad_tries;
2c5a744d
S		 950 u8 cur_per, new_per;
951
827e69bf
FF		 952 n_bad_tries = retries * tx_info->status.ampdu_len +
953 n_bad_frames;
954 n_frames = tx_info->status.ampdu_len * (retries + 1);
955 cur_per = (100 * n_bad_tries / n_frames) >> 3;
2c5a744d 956 new_per = (u8)(last_per - (last_per >> 3) + cur_per);
922bac60 957 ath_rc_priv->per[tx_rate] = new_per;
2c5a744d 958 }
f078f209 959 } else {
922bac60 960 ath_rc_priv->per[tx_rate] =
2c5a744d
S		 961 (u8)(last_per - (last_per >> 3) +
962 (nretry_to_per_lookup[retries] >> 3));
f078f209
LR		 963 }
964
f078f209
LR		 965
966 /*
967 * If we got at most one retry then increase the max rate if
968 * this was a probe. Otherwise, ignore the probe.
969 */
256b7759 970 if (ath_rc_priv->probe_rate && ath_rc_priv->probe_rate == tx_rate) {
827e69bf 971 if (retries > 0 || 2 * n_bad_frames > tx_info->status.ampdu_len) {
f078f209
LR		 972 /*
973 * Since we probed with just a single attempt,
974 * any retries means the probe failed. Also,
975 * if the attempt worked, but more than half
976 * the subframes were bad then also consider
977 * the probe a failure.
978 */
256b7759 979 ath_rc_priv->probe_rate = 0;
f078f209
LR		 980 } else {
981 u8 probe_rate = 0;
982
2c5a744d
S		 983 ath_rc_priv->rate_max_phy =
984 ath_rc_priv->probe_rate;
256b7759 985 probe_rate = ath_rc_priv->probe_rate;
f078f209 986
922bac60
VT		 987 if (ath_rc_priv->per[probe_rate] > 30)
988 ath_rc_priv->per[probe_rate] = 20;
f078f209 989
256b7759 990 ath_rc_priv->probe_rate = 0;
f078f209
LR		 991
992 /*
993 * Since this probe succeeded, we allow the next
994 * probe twice as soon. This allows the maxRate
995 * to move up faster if the probes are
af901ca1 996 * successful.
f078f209 997 */
2c5a744d
S		 998 ath_rc_priv->probe_time =
999 now_msec - rate_table->probe_interval / 2;
f078f209
LR		 1000 }
1001 }
1002
1003 if (retries > 0) {
1004 /*
1005 * Don't update anything. We don't know if
1006 * this was because of collisions or poor signal.
f078f209 1007 */
256b7759 1008 ath_rc_priv->hw_maxretry_pktcnt = 0;
f078f209
LR		 1009 } else {
1010 /*
1011 * It worked with no retries. First ignore bogus (small)
1012 * rssi_ack values.
1013 */
256b7759
S		 1014 if (tx_rate == ath_rc_priv->rate_max_phy &&
1015 ath_rc_priv->hw_maxretry_pktcnt < 255) {
1016 ath_rc_priv->hw_maxretry_pktcnt++;
f078f209
LR		 1017 }
1018
f078f209
LR		 1019 }
1020 }
2c5a744d
S		 1021}
1022
772d5515
FF		 1023static void ath_debug_stat_retries(struct ath_rate_priv *rc, int rix,
1024 int xretries, int retries, u8 per)
1025{
1026 struct ath_rc_stats *stats = &rc->rcstats[rix];
1027
1028 stats->xretries += xretries;
1029 stats->retries += retries;
1030 stats->per = per;
1031}
1032
2c5a744d
S		 1033/* Update PER, RSSI and whatever else that the code thinks it is doing.
1034 If you can make sense of all this, you really need to go out more. */
1035
1036static void ath_rc_update_ht(struct ath_softc *sc,
1037 struct ath_rate_priv *ath_rc_priv,
827e69bf 1038 struct ieee80211_tx_info *tx_info,
2c5a744d
S		 1039 int tx_rate, int xretries, int retries)
1040{
2c5a744d
S		 1041 u32 now_msec = jiffies_to_msecs(jiffies);
1042 int rate;
1043 u8 last_per;
4e990018 1044 const struct ath_rate_table *rate_table = ath_rc_priv->rate_table;
2c5a744d
S		 1045 int size = ath_rc_priv->rate_table_size;
1046
1047 if ((tx_rate < 0) || (tx_rate > rate_table->rate_cnt))
1048 return;
f078f209 1049
922bac60 1050 last_per = ath_rc_priv->per[tx_rate];
2c5a744d
S		 1051
1052 /* Update PER first */
0ff2b5c0
SM		 1053 ath_rc_update_per(sc, rate_table, ath_rc_priv,
1054 tx_info, tx_rate, xretries,
1055 retries, now_msec);
f078f209
LR		 1056
1057 /*
1058 * If this rate looks bad (high PER) then stop using it for
1059 * a while (except if we are probing).
1060 */
922bac60 1061 if (ath_rc_priv->per[tx_rate] >= 55 && tx_rate > 0 &&
dc2222a8 1062 rate_table->info[tx_rate].ratekbps <=
256b7759 1063 rate_table->info[ath_rc_priv->rate_max_phy].ratekbps) {
39448b0a
LR		 1064 ath_rc_get_lower_rix(rate_table, ath_rc_priv,
1065 (u8)tx_rate, &ath_rc_priv->rate_max_phy);
f078f209
LR		 1066
1067 /* Don't probe for a little while. */
256b7759 1068 ath_rc_priv->probe_time = now_msec;
f078f209
LR		 1069 }
1070
f078f209
LR		 1071 /* Make sure the rates below this have lower PER */
1072 /* Monotonicity is kept only for rates below the current rate. */
922bac60 1073 if (ath_rc_priv->per[tx_rate] < last_per) {
f078f209 1074 for (rate = tx_rate - 1; rate >= 0; rate--) {
f078f209 1075
922bac60
VT		 1076 if (ath_rc_priv->per[rate] >
1077 ath_rc_priv->per[rate+1]) {
1078 ath_rc_priv->per[rate] =
1079 ath_rc_priv->per[rate+1];
f078f209
LR		 1080 }
1081 }
1082 }
1083
1084 /* Maintain monotonicity for rates above the current rate */
2c5a744d 1085 for (rate = tx_rate; rate < size - 1; rate++) {
922bac60
VT		 1086 if (ath_rc_priv->per[rate+1] <
1087 ath_rc_priv->per[rate])
1088 ath_rc_priv->per[rate+1] =
1089 ath_rc_priv->per[rate];
f078f209
LR		 1090 }
1091
f078f209
LR		 1092 /* Every so often, we reduce the thresholds
1093 * and PER (different for CCK and OFDM). */
256b7759 1094 if (now_msec - ath_rc_priv->per_down_time >=
c4130465 1095 rate_table->probe_interval) {
2c5a744d 1096 for (rate = 0; rate < size; rate++) {
922bac60
VT		 1097 ath_rc_priv->per[rate] =
1098 7 * ath_rc_priv->per[rate] / 8;
f078f209
LR		 1099 }
1100
256b7759 1101 ath_rc_priv->per_down_time = now_msec;
f078f209 1102 }
2c5a744d 1103
772d5515 1104 ath_debug_stat_retries(ath_rc_priv, tx_rate, xretries, retries,
922bac60 1105 ath_rc_priv->per[tx_rate]);
029bc432 1106
2c5a744d
S		 1107}
1108
f078f209 1109
46d14a58
S		 1110static void ath_rc_tx_status(struct ath_softc *sc,
1111 struct ath_rate_priv *ath_rc_priv,
1112 struct ieee80211_tx_info *tx_info,
1113 int final_ts_idx, int xretries, int long_retry)
f078f209 1114{
4f0fc7c3 1115 const struct ath_rate_table *rate_table;
a8efee4f 1116 struct ieee80211_tx_rate *rates = tx_info->status.rates;
f078f209 1117 u8 flags;
2c5a744d 1118 u32 i = 0, rix;
f078f209 1119
4e990018 1120 rate_table = ath_rc_priv->rate_table;
f078f209
LR		 1121
1122 /*
1123 * If the first rate is not the final index, there
1124 * are intermediate rate failures to be processed.
1125 */
1126 if (final_ts_idx != 0) {
1127 /* Process intermediate rates that failed.*/
2c5a744d
S		 1128 for (i = 0; i < final_ts_idx ; i++) {
1129 if (rates[i].count != 0 && (rates[i].idx >= 0)) {
1130 flags = rates[i].flags;
1131
f078f209
LR		 1132 /* If HT40 and we have switched mode from
1133 * 40 to 20 => don't update */
2c5a744d 1134
a8efee4f 1135 if ((flags & IEEE80211_TX_RC_40_MHZ_WIDTH) &&
f5c38ef0 1136 !(ath_rc_priv->ht_cap & WLAN_RC_40_FLAG))
f078f209 1137 return;
e63835b0 1138
2c5a744d 1139 rix = ath_rc_get_rateindex(rate_table, &rates[i]);
827e69bf
FF		 1140 ath_rc_update_ht(sc, ath_rc_priv, tx_info,
1141 rix, xretries ? 1 : 2,
2c5a744d 1142 rates[i].count);
f078f209
LR		 1143 }
1144 }
1145 } else {
1146 /*
1147 * Handle the special case of MIMO PS burst, where the second
1148 * aggregate is sent out with only one rate and one try.
1149 * Treating it as an excessive retry penalizes the rate
1150 * inordinately.
1151 */
a8efee4f 1152 if (rates[0].count == 1 && xretries == 1)
f078f209
LR		 1153 xretries = 2;
1154 }
1155
2c5a744d
S		 1156 flags = rates[i].flags;
1157
f078f209 1158 /* If HT40 and we have switched mode from 40 to 20 => don't update */
a8efee4f 1159 if ((flags & IEEE80211_TX_RC_40_MHZ_WIDTH) &&
f5c38ef0 1160 !(ath_rc_priv->ht_cap & WLAN_RC_40_FLAG))
f078f209
LR		 1161 return;
1162
2c5a744d 1163 rix = ath_rc_get_rateindex(rate_table, &rates[i]);
827e69bf 1164 ath_rc_update_ht(sc, ath_rc_priv, tx_info, rix, xretries, long_retry);
f078f209
LR		 1165}
1166
4f0fc7c3
LR		 1167static const
1168struct ath_rate_table *ath_choose_rate_table(struct ath_softc *sc,
1169 enum ieee80211_band band,
d4659912 1170 bool is_ht)
e11602b7 1171{
e11602b7
S		 1172 switch(band) {
1173 case IEEE80211_BAND_2GHZ:
e11602b7 1174 if (is_ht)
d4659912
FF		 1175 return &ar5416_11ng_ratetable;
1176 return &ar5416_11g_ratetable;
e11602b7 1177 case IEEE80211_BAND_5GHZ:
e11602b7 1178 if (is_ht)
d4659912
FF		 1179 return &ar5416_11na_ratetable;
1180 return &ar5416_11a_ratetable;
e11602b7 1181 default:
e11602b7
S		 1182 return NULL;
1183 }
e11602b7
S		 1184}
1185
5ddfac3b 1186static void ath_rc_init(struct ath_softc *sc,
ea2771f6 1187 struct ath_rate_priv *ath_rc_priv)
f078f209 1188{
ea2771f6 1189 const struct ath_rate_table *rate_table = ath_rc_priv->rate_table;
5ddfac3b 1190 struct ath_rateset *rateset = &ath_rc_priv->neg_rates;
c46917bb 1191 struct ath_common *common = ath9k_hw_common(sc->sc_ah);
f078f209 1192 u8 i, j, k, hi = 0, hthi = 0;
f078f209 1193
46d14a58 1194 ath_rc_priv->rate_table_size = RATE_TABLE_SIZE;
f078f209 1195
5ddfac3b 1196 for (i = 0 ; i < ath_rc_priv->rate_table_size; i++) {
922bac60 1197 ath_rc_priv->per[i] = 0;
ea2771f6 1198 ath_rc_priv->valid_rate_index[i] = 0;
f078f209
LR		 1199 }
1200
f078f209 1201 for (i = 0; i < WLAN_RC_PHY_MAX; i++) {
d53c74e5 1202 for (j = 0; j < RATE_TABLE_SIZE; j++)
256b7759
S		 1203 ath_rc_priv->valid_phy_rateidx[i][j] = 0;
1204 ath_rc_priv->valid_phy_ratecnt[i] = 0;
f078f209 1205 }
f078f209 1206
f078f209 1207 if (!rateset->rs_nrates) {
ea2771f6 1208 hi = ath_rc_init_validrates(ath_rc_priv);
f078f209 1209 } else {
ea2771f6
SM		 1210 hi = ath_rc_setvalid_rates(ath_rc_priv);
1211
1212 if (ath_rc_priv->ht_cap & WLAN_RC_HT_FLAG)
1213 hthi = ath_rc_setvalid_htrates(ath_rc_priv);
1214
f6351d48 1215 hi = max(hi, hthi);
f078f209
LR		 1216 }
1217
256b7759
S		 1218 ath_rc_priv->rate_table_size = hi + 1;
1219 ath_rc_priv->rate_max_phy = 0;
ea2771f6 1220 WARN_ON(ath_rc_priv->rate_table_size > RATE_TABLE_SIZE);
f078f209
LR		 1221
1222 for (i = 0, k = 0; i < WLAN_RC_PHY_MAX; i++) {
256b7759
S		 1223 for (j = 0; j < ath_rc_priv->valid_phy_ratecnt[i]; j++) {
1224 ath_rc_priv->valid_rate_index[k++] =
1225 ath_rc_priv->valid_phy_rateidx[i][j];
f078f209
LR		 1226 }
1227
ea2771f6
SM		 1228 if (!ath_rc_valid_phyrate(i, rate_table->initial_ratemax, 1) ||
1229 !ath_rc_priv->valid_phy_ratecnt[i])
f078f209
LR		 1230 continue;
1231
256b7759 1232 ath_rc_priv->rate_max_phy = ath_rc_priv->valid_phy_rateidx[i][j-1];
f078f209 1233 }
ea2771f6
SM		 1234 WARN_ON(ath_rc_priv->rate_table_size > RATE_TABLE_SIZE);
1235 WARN_ON(k > RATE_TABLE_SIZE);
f078f209 1236
256b7759 1237 ath_rc_priv->max_valid_rate = k;
ea2771f6 1238 ath_rc_sort_validrates(ath_rc_priv);
10636bc2 1239 ath_rc_priv->rate_max_phy = (k > 4) ?
ea2771f6
SM		 1240 ath_rc_priv->valid_rate_index[k-4] :
1241 ath_rc_priv->valid_rate_index[k-1];
9331ec80 1242
d2182b69 1243 ath_dbg(common, CONFIG, "RC Initialized with capabilities: 0x%x\n",
226afe68 1244 ath_rc_priv->ht_cap);
f078f209
LR		 1245}
1246
62a29186 1247static u8 ath_rc_build_ht_caps(struct ath_softc *sc, struct ieee80211_sta *sta)
9331ec80
S		 1248{
1249 u8 caps = 0;
1250
c2da50e5 1251 if (sta->ht_cap.ht_supported) {
9331ec80 1252 caps = WLAN_RC_HT_FLAG;
1d9d06a2
SB		 1253 if (sta->ht_cap.mcs.rx_mask[1] && sta->ht_cap.mcs.rx_mask[2])
1254 caps |= WLAN_RC_TS_FLAG | WLAN_RC_DS_FLAG;
1255 else if (sta->ht_cap.mcs.rx_mask[1])
3553727c 1256 caps |= WLAN_RC_DS_FLAG;
62a29186 1257 if (sta->ht_cap.cap & IEEE80211_HT_CAP_SUP_WIDTH_20_40)
9331ec80 1258 caps |= WLAN_RC_40_FLAG;
62a29186
SM		 1259 if (sta->ht_cap.cap & IEEE80211_HT_CAP_SGI_40 ||
1260 sta->ht_cap.cap & IEEE80211_HT_CAP_SGI_20)
9331ec80
S		 1261 caps |= WLAN_RC_SGI_FLAG;
1262 }
1263
1264 return caps;
1265}
1266
3d4e20f2 1267static bool ath_tx_aggr_check(struct ath_softc *sc, struct ieee80211_sta *sta,
334b0602
FF		 1268 u8 tidno)
1269{
3d4e20f2 1270 struct ath_node *an = (struct ath_node *)sta->drv_priv;
334b0602
FF		 1271 struct ath_atx_tid *txtid;
1272
3d4e20f2 1273 if (!sta->ht_cap.ht_supported)
334b0602
FF		 1274 return false;
1275
1276 txtid = ATH_AN_2_TID(an, tidno);
1277
1278 if (!(txtid->state & (AGGR_ADDBA_COMPLETE | AGGR_ADDBA_PROGRESS)))
1279 return true;
1280 return false;
1281}
1282
1283
9331ec80
S		 1284/***********************************/
1285/* mac80211 Rate Control callbacks */
1286/***********************************/
1287
772d5515
FF		 1288static void ath_debug_stat_rc(struct ath_rate_priv *rc, int final_rate)
1289{
1290 struct ath_rc_stats *stats;
1291
1292 stats = &rc->rcstats[final_rate];
1293 stats->success++;
1294}
1295
1296
4b7679a5
JB		 1297static void ath_tx_status(void *priv, struct ieee80211_supported_band *sband,
1298 struct ieee80211_sta *sta, void *priv_sta,
f078f209
LR		 1299 struct sk_buff *skb)
1300{
1301 struct ath_softc *sc = priv;
46d14a58 1302 struct ath_rate_priv *ath_rc_priv = priv_sta;
f078f209
LR		 1303 struct ieee80211_tx_info *tx_info = IEEE80211_SKB_CB(skb);
1304 struct ieee80211_hdr *hdr;
2ae79d52 1305 int final_ts_idx = 0, tx_status = 0;
827e69bf 1306 int long_retry = 0;
f078f209 1307 __le16 fc;
827e69bf 1308 int i;
f078f209 1309
f078f209
LR		 1310 hdr = (struct ieee80211_hdr *)skb->data;
1311 fc = hdr->frame_control;
19b96750 1312 for (i = 0; i < sc->hw->max_rates; i++) {
827e69bf 1313 struct ieee80211_tx_rate *rate = &tx_info->status.rates[i];
2504a642 1314 if (rate->idx < 0 || !rate->count)
827e69bf
FF		 1315 break;
1316
1317 final_ts_idx = i;
1318 long_retry = rate->count - 1;
1319 }
f078f209 1320
d969847c
FF		 1321 if (!priv_sta || !ieee80211_is_data(fc))
1322 return;
1323
1324 /* This packet was aggregated but doesn't carry status info */
1325 if ((tx_info->flags & IEEE80211_TX_CTL_AMPDU) &&
1326 !(tx_info->flags & IEEE80211_TX_STAT_AMPDU))
827e69bf 1327 return;
e6a9854b 1328
827e69bf
FF		 1329 if (tx_info->flags & IEEE80211_TX_STAT_TX_FILTERED)
1330 return;
e6a9854b 1331
1d666d8e 1332 if (!(tx_info->flags & IEEE80211_TX_STAT_ACK))
46d14a58
S		 1333 tx_status = 1;
1334
1335 ath_rc_tx_status(sc, ath_rc_priv, tx_info, final_ts_idx, tx_status,
2ae79d52 1336 long_retry);
46d14a58 1337
d22b0022 1338 /* Check if aggregation has to be enabled for this tid */
d5c232ff
VT		 1339 if (conf_is_ht(&sc->hw->conf) &&
1340 !(skb->protocol == cpu_to_be16(ETH_P_PAE))) {
c8b57606
LR		 1341 if (ieee80211_is_data_qos(fc) &&
1342 skb_get_queue_mapping(skb) != IEEE80211_AC_VO) {
d22b0022 1343 u8 *qc, tid;
d22b0022
S		 1344
1345 qc = ieee80211_get_qos_ctl(hdr);
1346 tid = qc[0] & 0xf;
d22b0022 1347
3d4e20f2 1348 if(ath_tx_aggr_check(sc, sta, tid))
bd2ce6e4 1349 ieee80211_start_tx_ba_session(sta, tid, 0);
d22b0022
S		 1350 }
1351 }
7a7dec65 1352
4e990018
FF		 1353 ath_debug_stat_rc(ath_rc_priv,
1354 ath_rc_get_rateindex(ath_rc_priv->rate_table,
1355 &tx_info->status.rates[final_ts_idx]));
f078f209
LR		 1356}
1357
4b7679a5
JB		 1358static void ath_rate_init(void *priv, struct ieee80211_supported_band *sband,
1359 struct ieee80211_sta *sta, void *priv_sta)
f078f209 1360{
4b7679a5 1361 struct ath_softc *sc = priv;
62a29186 1362 struct ath_common *common = ath9k_hw_common(sc->sc_ah);
46d14a58 1363 struct ath_rate_priv *ath_rc_priv = priv_sta;
f078f209
LR		 1364 int i, j = 0;
1365
7b4d2735
S		 1366 for (i = 0; i < sband->n_bitrates; i++) {
1367 if (sta->supp_rates[sband->band] & BIT(i)) {
1368 ath_rc_priv->neg_rates.rs_rates[j]
1369 = (sband->bitrates[i].bitrate * 2) / 10;
1370 j++;
1371 }
1372 }
1373 ath_rc_priv->neg_rates.rs_nrates = j;
f078f209 1374
a4510bf8 1375 if (sta->ht_cap.ht_supported) {
7b4d2735 1376 for (i = 0, j = 0; i < 77; i++) {
ae5eb026 1377 if (sta->ht_cap.mcs.rx_mask[i/8] & (1<<(i%8)))
dc2222a8 1378 ath_rc_priv->neg_ht_rates.rs_rates[j++] = i;
f078f209
LR		 1379 if (j == ATH_RATE_MAX)
1380 break;
1381 }
dc2222a8 1382 ath_rc_priv->neg_ht_rates.rs_nrates = j;
f078f209 1383 }
7b4d2735 1384
ea2771f6
SM		 1385 ath_rc_priv->rate_table = ath_choose_rate_table(sc, sband->band,
1386 sta->ht_cap.ht_supported);
1387 if (!ath_rc_priv->rate_table) {
62a29186
SM		 1388 ath_err(common, "No rate table chosen\n");
1389 return;
1390 }
9331ec80 1391
62a29186 1392 ath_rc_priv->ht_cap = ath_rc_build_ht_caps(sc, sta);
ea2771f6 1393 ath_rc_init(sc, priv_sta);
9331ec80
S		 1394}
1395
1396static void ath_rate_update(void *priv, struct ieee80211_supported_band *sband,
1397 struct ieee80211_sta *sta, void *priv_sta,
64f68e5d 1398 u32 changed)
9331ec80
S		 1399{
1400 struct ath_softc *sc = priv;
1401 struct ath_rate_priv *ath_rc_priv = priv_sta;
9331ec80 1402
8f727ef3 1403 if (changed & IEEE80211_RC_BW_CHANGED) {
62a29186 1404 ath_rc_priv->ht_cap = ath_rc_build_ht_caps(sc, sta);
ea2771f6 1405 ath_rc_init(sc, priv_sta);
9331ec80 1406
62a29186
SM		 1407 ath_dbg(ath9k_hw_common(sc->sc_ah), CONFIG,
1408 "Operating HT Bandwidth changed to: %d\n",
1409 sc->hw->conf.channel_type);
9331ec80 1410 }
f078f209
LR		 1411}
1412
772d5515
FF		 1413#ifdef CONFIG_ATH9K_DEBUGFS
1414
772d5515
FF		 1415static ssize_t read_file_rcstat(struct file *file, char __user *user_buf,
1416 size_t count, loff_t *ppos)
1417{
1418 struct ath_rate_priv *rc = file->private_data;
1419 char *buf;
1420 unsigned int len = 0, max;
1421 int i = 0;
1422 ssize_t retval;
1423
1424 if (rc->rate_table == NULL)
1425 return 0;
1426
32359e30 1427 max = 80 + rc->rate_table_size * 1024 + 1;
772d5515
FF		 1428 buf = kmalloc(max, GFP_KERNEL);
1429 if (buf == NULL)
1430 return -ENOMEM;
1431
1432 len += sprintf(buf, "%6s %6s %6s "
1433 "%10s %10s %10s %10s\n",
1434 "HT", "MCS", "Rate",
1435 "Success", "Retries", "XRetries", "PER");
1436
32359e30 1437 for (i = 0; i < rc->rate_table_size; i++) {
772d5515
FF		 1438 u32 ratekbps = rc->rate_table->info[i].ratekbps;
1439 struct ath_rc_stats *stats = &rc->rcstats[i];
1440 char mcs[5];
1441 char htmode[5];
1442 int used_mcs = 0, used_htmode = 0;
1443
1444 if (WLAN_RC_PHY_HT(rc->rate_table->info[i].phy)) {
1445 used_mcs = snprintf(mcs, 5, "%d",
1446 rc->rate_table->info[i].ratecode);
1447
1448 if (WLAN_RC_PHY_40(rc->rate_table->info[i].phy))
1449 used_htmode = snprintf(htmode, 5, "HT40");
1450 else if (WLAN_RC_PHY_20(rc->rate_table->info[i].phy))
1451 used_htmode = snprintf(htmode, 5, "HT20");
1452 else
1453 used_htmode = snprintf(htmode, 5, "????");
1454 }
1455
1456 mcs[used_mcs] = '\0';
1457 htmode[used_htmode] = '\0';
1458
1459 len += snprintf(buf + len, max - len,
1460 "%6s %6s %3u.%d: "
1461 "%10u %10u %10u %10u\n",
1462 htmode,
1463 mcs,
1464 ratekbps / 1000,
1465 (ratekbps % 1000) / 100,
1466 stats->success,
1467 stats->retries,
1468 stats->xretries,
1469 stats->per);
1470 }
1471
1472 if (len > max)
1473 len = max;
1474
1475 retval = simple_read_from_buffer(user_buf, count, ppos, buf, len);
1476 kfree(buf);
1477 return retval;
1478}
1479
1480static const struct file_operations fops_rcstat = {
1481 .read = read_file_rcstat,
234e3405 1482 .open = simple_open,
772d5515
FF		 1483 .owner = THIS_MODULE
1484};
1485
1486static void ath_rate_add_sta_debugfs(void *priv, void *priv_sta,
1487 struct dentry *dir)
1488{
1489 struct ath_rate_priv *rc = priv_sta;
1490 debugfs_create_file("rc_stats", S_IRUGO, dir, rc, &fops_rcstat);
1491}
1492
1493#endif /* CONFIG_ATH9K_DEBUGFS */
1494
4b7679a5 1495static void *ath_rate_alloc(struct ieee80211_hw *hw, struct dentry *debugfsdir)
f078f209 1496{
9ac58615 1497 return hw->priv;
f078f209
LR		 1498}
1499
1500static void ath_rate_free(void *priv)
1501{
1502 return;
1503}
1504
4b7679a5 1505static void *ath_rate_alloc_sta(void *priv, struct ieee80211_sta *sta, gfp_t gfp)
f078f209
LR		 1506{
1507 struct ath_softc *sc = priv;
46d14a58 1508 struct ath_rate_priv *rate_priv;
f078f209 1509
46d14a58 1510 rate_priv = kzalloc(sizeof(struct ath_rate_priv), gfp);
f078f209 1511 if (!rate_priv) {
3800276a
JP		 1512 ath_err(ath9k_hw_common(sc->sc_ah),
1513 "Unable to allocate private rc structure\n");
f078f209
LR		 1514 return NULL;
1515 }
fe60594a 1516
f078f209
LR		 1517 return rate_priv;
1518}
1519
4b7679a5
JB		 1520static void ath_rate_free_sta(void *priv, struct ieee80211_sta *sta,
1521 void *priv_sta)
f078f209 1522{
46d14a58 1523 struct ath_rate_priv *rate_priv = priv_sta;
fe60594a 1524 kfree(rate_priv);
f078f209
LR		 1525}
1526
1527static struct rate_control_ops ath_rate_ops = {
1528 .module = NULL,
1529 .name = "ath9k_rate_control",
1530 .tx_status = ath_tx_status,
1531 .get_rate = ath_get_rate,
1532 .rate_init = ath_rate_init,
9331ec80 1533 .rate_update = ath_rate_update,
f078f209
LR		 1534 .alloc = ath_rate_alloc,
1535 .free = ath_rate_free,
1536 .alloc_sta = ath_rate_alloc_sta,
4b7679a5 1537 .free_sta = ath_rate_free_sta,
772d5515
FF		 1538#ifdef CONFIG_ATH9K_DEBUGFS
1539 .add_sta_debugfs = ath_rate_add_sta_debugfs,
1540#endif
f078f209
LR		 1541};
1542
1543int ath_rate_control_register(void)
1544{
1545 return ieee80211_rate_control_register(&ath_rate_ops);
1546}
1547
1548void ath_rate_control_unregister(void)
1549{
1550 ieee80211_rate_control_unregister(&ath_rate_ops);
1551}
kernel source for telekom puls (alcatel/mediatek)