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hwmon: (max6650) Add support for alarms
[deliverable/linux.git] / drivers / net / wireless / ath9k / rc.c
CommitLineData
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
394cf0a1 18#include "ath9k.h"
f078f209 19
f078f209
LR		 20static struct ath_rate_table ar5416_11na_ratetable = {
21 42,
22 {
46d14a58 23 { VALID, VALID, WLAN_RC_PHY_OFDM, 6000, /* 6 Mb */
f078f209
LR		 24 5400, 0x0b, 0x00, 12,
25 0, 2, 1, 0, 0, 0, 0, 0 },
e8324357 26 { VALID, VALID, WLAN_RC_PHY_OFDM, 9000, /* 9 Mb */
f078f209
LR		 27 7800, 0x0f, 0x00, 18,
28 0, 3, 1, 1, 1, 1, 1, 0 },
46d14a58 29 { VALID, VALID, WLAN_RC_PHY_OFDM, 12000, /* 12 Mb */
f078f209
LR		 30 10000, 0x0a, 0x00, 24,
31 2, 4, 2, 2, 2, 2, 2, 0 },
46d14a58 32 { VALID, VALID, WLAN_RC_PHY_OFDM, 18000, /* 18 Mb */
f078f209
LR		 33 13900, 0x0e, 0x00, 36,
34 2, 6, 2, 3, 3, 3, 3, 0 },
46d14a58 35 { VALID, VALID, WLAN_RC_PHY_OFDM, 24000, /* 24 Mb */
f078f209
LR		 36 17300, 0x09, 0x00, 48,
37 4, 10, 3, 4, 4, 4, 4, 0 },
46d14a58 38 { VALID, VALID, WLAN_RC_PHY_OFDM, 36000, /* 36 Mb */
f078f209
LR		 39 23000, 0x0d, 0x00, 72,
40 4, 14, 3, 5, 5, 5, 5, 0 },
46d14a58 41 { VALID, VALID, WLAN_RC_PHY_OFDM, 48000, /* 48 Mb */
f078f209
LR		 42 27400, 0x08, 0x00, 96,
43 4, 20, 3, 6, 6, 6, 6, 0 },
46d14a58 44 { VALID, VALID, WLAN_RC_PHY_OFDM, 54000, /* 54 Mb */
f078f209
LR		 45 29300, 0x0c, 0x00, 108,
46 4, 23, 3, 7, 7, 7, 7, 0 },
46d14a58 47 { VALID_20, VALID_20, WLAN_RC_PHY_HT_20_SS, 6500, /* 6.5 Mb */
f078f209
LR		 48 6400, 0x80, 0x00, 0,
49 0, 2, 3, 8, 24, 8, 24, 3216 },
46d14a58 50 { VALID_20, VALID_20, WLAN_RC_PHY_HT_20_SS, 13000, /* 13 Mb */
f078f209
LR		 51 12700, 0x81, 0x00, 1,
52 2, 4, 3, 9, 25, 9, 25, 6434 },
46d14a58 53 { VALID_20, VALID_20, WLAN_RC_PHY_HT_20_SS, 19500, /* 19.5 Mb */
f078f209
LR		 54 18800, 0x82, 0x00, 2,
55 2, 6, 3, 10, 26, 10, 26, 9650 },
46d14a58 56 { VALID_20, VALID_20, WLAN_RC_PHY_HT_20_SS, 26000, /* 26 Mb */
f078f209
LR		 57 25000, 0x83, 0x00, 3,
58 4, 10, 3, 11, 27, 11, 27, 12868 },
46d14a58 59 { VALID_20, VALID_20, WLAN_RC_PHY_HT_20_SS, 39000, /* 39 Mb */
f078f209
LR		 60 36700, 0x84, 0x00, 4,
61 4, 14, 3, 12, 28, 12, 28, 19304 },
46d14a58 62 { INVALID, VALID_20, WLAN_RC_PHY_HT_20_SS, 52000, /* 52 Mb */
f078f209
LR		 63 48100, 0x85, 0x00, 5,
64 4, 20, 3, 13, 29, 13, 29, 25740 },
46d14a58 65 { INVALID, VALID_20, WLAN_RC_PHY_HT_20_SS, 58500, /* 58.5 Mb */
f078f209
LR		 66 53500, 0x86, 0x00, 6,
67 4, 23, 3, 14, 30, 14, 30, 28956 },
46d14a58 68 { INVALID, VALID_20, WLAN_RC_PHY_HT_20_SS, 65000, /* 65 Mb */
f078f209
LR		 69 59000, 0x87, 0x00, 7,
70 4, 25, 3, 15, 31, 15, 32, 32180 },
46d14a58 71 { INVALID, INVALID, WLAN_RC_PHY_HT_20_DS, 13000, /* 13 Mb */
f078f209
LR		 72 12700, 0x88, 0x00,
73 8, 0, 2, 3, 16, 33, 16, 33, 6430 },
46d14a58 74 { INVALID, INVALID, WLAN_RC_PHY_HT_20_DS, 26000, /* 26 Mb */
f078f209
LR		 75 24800, 0x89, 0x00, 9,
76 2, 4, 3, 17, 34, 17, 34, 12860 },
46d14a58 77 { INVALID, INVALID, WLAN_RC_PHY_HT_20_DS, 39000, /* 39 Mb */
f078f209
LR		 78 36600, 0x8a, 0x00, 10,
79 2, 6, 3, 18, 35, 18, 35, 19300 },
46d14a58 80 { VALID_20, INVALID, WLAN_RC_PHY_HT_20_DS, 52000, /* 52 Mb */
f078f209
LR		 81 48100, 0x8b, 0x00, 11,
82 4, 10, 3, 19, 36, 19, 36, 25736 },
46d14a58 83 { VALID_20, INVALID, WLAN_RC_PHY_HT_20_DS, 78000, /* 78 Mb */
f078f209
LR		 84 69500, 0x8c, 0x00, 12,
85 4, 14, 3, 20, 37, 20, 37, 38600 },
46d14a58 86 { VALID_20, INVALID, WLAN_RC_PHY_HT_20_DS, 104000, /* 104 Mb */
f078f209
LR		 87 89500, 0x8d, 0x00, 13,
88 4, 20, 3, 21, 38, 21, 38, 51472 },
46d14a58 89 { VALID_20, INVALID, WLAN_RC_PHY_HT_20_DS, 117000, /* 117 Mb */
f078f209
LR		 90 98900, 0x8e, 0x00, 14,
91 4, 23, 3, 22, 39, 22, 39, 57890 },
46d14a58 92 { VALID_20, INVALID, WLAN_RC_PHY_HT_20_DS, 130000, /* 130 Mb */
f078f209
LR		 93 108300, 0x8f, 0x00, 15,
94 4, 25, 3, 23, 40, 23, 41, 64320 },
46d14a58 95 { VALID_40, VALID_40, WLAN_RC_PHY_HT_40_SS, 13500, /* 13.5 Mb */
f078f209
LR		 96 13200, 0x80, 0x00, 0,
97 0, 2, 3, 8, 24, 24, 24, 6684 },
46d14a58 98 { VALID_40, VALID_40, WLAN_RC_PHY_HT_40_SS, 27500, /* 27.0 Mb */
f078f209
LR		 99 25900, 0x81, 0x00, 1,
100 2, 4, 3, 9, 25, 25, 25, 13368 },
46d14a58 101 { VALID_40, VALID_40, WLAN_RC_PHY_HT_40_SS, 40500, /* 40.5 Mb */
f078f209
LR		 102 38600, 0x82, 0x00, 2,
103 2, 6, 3, 10, 26, 26, 26, 20052 },
46d14a58 104 { VALID_40, VALID_40, WLAN_RC_PHY_HT_40_SS, 54000, /* 54 Mb */
f078f209
LR		 105 49800, 0x83, 0x00, 3,
106 4, 10, 3, 11, 27, 27, 27, 26738 },
46d14a58 107 { VALID_40, VALID_40, WLAN_RC_PHY_HT_40_SS, 81500, /* 81 Mb */
f078f209
LR		 108 72200, 0x84, 0x00, 4,
109 4, 14, 3, 12, 28, 28, 28, 40104 },
46d14a58 110 { INVALID, VALID_40, WLAN_RC_PHY_HT_40_SS, 108000, /* 108 Mb */
f078f209
LR		 111 92900, 0x85, 0x00, 5,
112 4, 20, 3, 13, 29, 29, 29, 53476 },
46d14a58 113 { INVALID, VALID_40, WLAN_RC_PHY_HT_40_SS, 121500, /* 121.5 Mb */
f078f209
LR		 114 102700, 0x86, 0x00, 6,
115 4, 23, 3, 14, 30, 30, 30, 60156 },
46d14a58 116 { INVALID, VALID_40, WLAN_RC_PHY_HT_40_SS, 135000, /* 135 Mb */
f078f209
LR		 117 112000, 0x87, 0x00, 7,
118 4, 25, 3, 15, 31, 32, 32, 66840 },
46d14a58 119 { INVALID, VALID_40, WLAN_RC_PHY_HT_40_SS_HGI, 150000, /* 150 Mb */
f078f209
LR		 120 122000, 0x87, 0x00, 7,
121 4, 25, 3, 15, 31, 32, 32, 74200 },
46d14a58 122 { INVALID, INVALID, WLAN_RC_PHY_HT_40_DS, 27000, /* 27 Mb */
f078f209
LR		 123 25800, 0x88, 0x00, 8,
124 0, 2, 3, 16, 33, 33, 33, 13360 },
46d14a58 125 { INVALID, INVALID, WLAN_RC_PHY_HT_40_DS, 54000, /* 54 Mb */
f078f209
LR		 126 49800, 0x89, 0x00, 9,
127 2, 4, 3, 17, 34, 34, 34, 26720 },
46d14a58 128 { INVALID, INVALID, WLAN_RC_PHY_HT_40_DS, 81000, /* 81 Mb */
f078f209
LR		 129 71900, 0x8a, 0x00, 10,
130 2, 6, 3, 18, 35, 35, 35, 40080 },
46d14a58 131 { VALID_40, INVALID, WLAN_RC_PHY_HT_40_DS, 108000, /* 108 Mb */
f078f209
LR		 132 92500, 0x8b, 0x00, 11,
133 4, 10, 3, 19, 36, 36, 36, 53440 },
46d14a58 134 { VALID_40, INVALID, WLAN_RC_PHY_HT_40_DS, 162000, /* 162 Mb */
f078f209
LR		 135 130300, 0x8c, 0x00, 12,
136 4, 14, 3, 20, 37, 37, 37, 80160 },
46d14a58 137 { VALID_40, INVALID, WLAN_RC_PHY_HT_40_DS, 216000, /* 216 Mb */
f078f209
LR		 138 162800, 0x8d, 0x00, 13,
139 4, 20, 3, 21, 38, 38, 38, 106880 },
46d14a58 140 { VALID_40, INVALID, WLAN_RC_PHY_HT_40_DS, 243000, /* 243 Mb */
f078f209
LR		 141 178200, 0x8e, 0x00, 14,
142 4, 23, 3, 22, 39, 39, 39, 120240 },
46d14a58 143 { VALID_40, INVALID, WLAN_RC_PHY_HT_40_DS, 270000, /* 270 Mb */
f078f209
LR		 144 192100, 0x8f, 0x00, 15,
145 4, 25, 3, 23, 40, 41, 41, 133600 },
46d14a58 146 { VALID_40, INVALID, WLAN_RC_PHY_HT_40_DS_HGI, 300000, /* 300 Mb */
f078f209
LR		 147 207000, 0x8f, 0x00, 15,
148 4, 25, 3, 23, 40, 41, 41, 148400 },
149 },
150 50, /* probe interval */
151 50, /* rssi reduce interval */
152 WLAN_RC_HT_FLAG, /* Phy rates allowed initially */
153};
154
f078f209
LR		 155/* 4ms frame limit not used for NG mode. The values filled
156 * for HT are the 64K max aggregate limit */
157
158static struct ath_rate_table ar5416_11ng_ratetable = {
159 46,
160 {
46d14a58 161 { VALID_ALL, VALID_ALL, WLAN_RC_PHY_CCK, 1000, /* 1 Mb */
f078f209
LR		 162 900, 0x1b, 0x00, 2,
163 0, 0, 1, 0, 0, 0, 0, 0 },
46d14a58 164 { VALID_ALL, VALID_ALL, WLAN_RC_PHY_CCK, 2000, /* 2 Mb */
f078f209
LR		 165 1900, 0x1a, 0x04, 4,
166 1, 1, 1, 1, 1, 1, 1, 0 },
46d14a58 167 { VALID_ALL, VALID_ALL, WLAN_RC_PHY_CCK, 5500, /* 5.5 Mb */
f078f209
LR		 168 4900, 0x19, 0x04, 11,
169 2, 2, 2, 2, 2, 2, 2, 0 },
46d14a58 170 { VALID_ALL, VALID_ALL, WLAN_RC_PHY_CCK, 11000, /* 11 Mb */
f078f209
LR		 171 8100, 0x18, 0x04, 22,
172 3, 3, 2, 3, 3, 3, 3, 0 },
46d14a58 173 { INVALID, INVALID, WLAN_RC_PHY_OFDM, 6000, /* 6 Mb */
f078f209
LR		 174 5400, 0x0b, 0x00, 12,
175 4, 2, 1, 4, 4, 4, 4, 0 },
46d14a58 176 { INVALID, INVALID, WLAN_RC_PHY_OFDM, 9000, /* 9 Mb */
f078f209
LR		 177 7800, 0x0f, 0x00, 18,
178 4, 3, 1, 5, 5, 5, 5, 0 },
46d14a58 179 { VALID, VALID, WLAN_RC_PHY_OFDM, 12000, /* 12 Mb */
f078f209
LR		 180 10100, 0x0a, 0x00, 24,
181 6, 4, 1, 6, 6, 6, 6, 0 },
46d14a58 182 { VALID, VALID, WLAN_RC_PHY_OFDM, 18000, /* 18 Mb */
f078f209
LR		 183 14100, 0x0e, 0x00, 36,
184 6, 6, 2, 7, 7, 7, 7, 0 },
46d14a58 185 { VALID, VALID, WLAN_RC_PHY_OFDM, 24000, /* 24 Mb */
f078f209
LR		 186 17700, 0x09, 0x00, 48,
187 8, 10, 3, 8, 8, 8, 8, 0 },
46d14a58 188 { VALID, VALID, WLAN_RC_PHY_OFDM, 36000, /* 36 Mb */
f078f209
LR		 189 23700, 0x0d, 0x00, 72,
190 8, 14, 3, 9, 9, 9, 9, 0 },
46d14a58 191 { VALID, VALID, WLAN_RC_PHY_OFDM, 48000, /* 48 Mb */
f078f209
LR		 192 27400, 0x08, 0x00, 96,
193 8, 20, 3, 10, 10, 10, 10, 0 },
46d14a58 194 { VALID, VALID, WLAN_RC_PHY_OFDM, 54000, /* 54 Mb */
f078f209
LR		 195 30900, 0x0c, 0x00, 108,
196 8, 23, 3, 11, 11, 11, 11, 0 },
46d14a58 197 { INVALID, INVALID, WLAN_RC_PHY_HT_20_SS, 6500, /* 6.5 Mb */
f078f209
LR		 198 6400, 0x80, 0x00, 0,
199 4, 2, 3, 12, 28, 12, 28, 3216 },
46d14a58 200 { VALID_20, VALID_20, WLAN_RC_PHY_HT_20_SS, 13000, /* 13 Mb */
f078f209
LR		 201 12700, 0x81, 0x00, 1,
202 6, 4, 3, 13, 29, 13, 29, 6434 },
46d14a58 203 { VALID_20, VALID_20, WLAN_RC_PHY_HT_20_SS, 19500, /* 19.5 Mb */
f078f209
LR		 204 18800, 0x82, 0x00, 2,
205 6, 6, 3, 14, 30, 14, 30, 9650 },
46d14a58 206 { VALID_20, VALID_20, WLAN_RC_PHY_HT_20_SS, 26000, /* 26 Mb */
f078f209
LR		 207 25000, 0x83, 0x00, 3,
208 8, 10, 3, 15, 31, 15, 31, 12868 },
46d14a58 209 { VALID_20, VALID_20, WLAN_RC_PHY_HT_20_SS, 39000, /* 39 Mb */
f078f209
LR		 210 36700, 0x84, 0x00, 4,
211 8, 14, 3, 16, 32, 16, 32, 19304 },
46d14a58 212 { INVALID, VALID_20, WLAN_RC_PHY_HT_20_SS, 52000, /* 52 Mb */
f078f209
LR		 213 48100, 0x85, 0x00, 5,
214 8, 20, 3, 17, 33, 17, 33, 25740 },
46d14a58 215 { INVALID, VALID_20, WLAN_RC_PHY_HT_20_SS, 58500, /* 58.5 Mb */
f078f209
LR		 216 53500, 0x86, 0x00, 6,
217 8, 23, 3, 18, 34, 18, 34, 28956 },
46d14a58 218 { INVALID, VALID_20, WLAN_RC_PHY_HT_20_SS, 65000, /* 65 Mb */
f078f209
LR		 219 59000, 0x87, 0x00, 7,
220 8, 25, 3, 19, 35, 19, 36, 32180 },
46d14a58 221 { INVALID, INVALID, WLAN_RC_PHY_HT_20_DS, 13000, /* 13 Mb */
f078f209
LR		 222 12700, 0x88, 0x00, 8,
223 4, 2, 3, 20, 37, 20, 37, 6430 },
46d14a58 224 { INVALID, INVALID, WLAN_RC_PHY_HT_20_DS, 26000, /* 26 Mb */
f078f209
LR		 225 24800, 0x89, 0x00, 9,
226 6, 4, 3, 21, 38, 21, 38, 12860 },
46d14a58 227 { INVALID, INVALID, WLAN_RC_PHY_HT_20_DS, 39000, /* 39 Mb */
f078f209
LR		 228 36600, 0x8a, 0x00, 10,
229 6, 6, 3, 22, 39, 22, 39, 19300 },
46d14a58 230 { VALID_20, INVALID, WLAN_RC_PHY_HT_20_DS, 52000, /* 52 Mb */
f078f209
LR		 231 48100, 0x8b, 0x00, 11,
232 8, 10, 3, 23, 40, 23, 40, 25736 },
46d14a58 233 { VALID_20, INVALID, WLAN_RC_PHY_HT_20_DS, 78000, /* 78 Mb */
f078f209
LR		 234 69500, 0x8c, 0x00, 12,
235 8, 14, 3, 24, 41, 24, 41, 38600 },
46d14a58 236 { VALID_20, INVALID, WLAN_RC_PHY_HT_20_DS, 104000, /* 104 Mb */
f078f209
LR		 237 89500, 0x8d, 0x00, 13,
238 8, 20, 3, 25, 42, 25, 42, 51472 },
46d14a58 239 { VALID_20, INVALID, WLAN_RC_PHY_HT_20_DS, 117000, /* 117 Mb */
f078f209
LR		 240 98900, 0x8e, 0x00, 14,
241 8, 23, 3, 26, 43, 26, 44, 57890 },
46d14a58 242 { VALID_20, INVALID, WLAN_RC_PHY_HT_20_DS, 130000, /* 130 Mb */
f078f209
LR		 243 108300, 0x8f, 0x00, 15,
244 8, 25, 3, 27, 44, 27, 45, 64320 },
46d14a58 245 { VALID_40, VALID_40, WLAN_RC_PHY_HT_40_SS, 13500, /* 13.5 Mb */
f078f209
LR		 246 13200, 0x80, 0x00, 0,
247 8, 2, 3, 12, 28, 28, 28, 6684 },
46d14a58 248 { VALID_40, VALID_40, WLAN_RC_PHY_HT_40_SS, 27500, /* 27.0 Mb */
f078f209
LR		 249 25900, 0x81, 0x00, 1,
250 8, 4, 3, 13, 29, 29, 29, 13368 },
46d14a58 251 { VALID_40, VALID_40, WLAN_RC_PHY_HT_40_SS, 40500, /* 40.5 Mb */
f078f209
LR		 252 38600, 0x82, 0x00, 2,
253 8, 6, 3, 14, 30, 30, 30, 20052 },
46d14a58 254 { VALID_40, VALID_40, WLAN_RC_PHY_HT_40_SS, 54000, /* 54 Mb */
f078f209
LR		 255 49800, 0x83, 0x00, 3,
256 8, 10, 3, 15, 31, 31, 31, 26738 },
46d14a58 257 { VALID_40, VALID_40, WLAN_RC_PHY_HT_40_SS, 81500, /* 81 Mb */
f078f209
LR		 258 72200, 0x84, 0x00, 4,
259 8, 14, 3, 16, 32, 32, 32, 40104 },
46d14a58 260 { INVALID, VALID_40, WLAN_RC_PHY_HT_40_SS, 108000, /* 108 Mb */
f078f209
LR		 261 92900, 0x85, 0x00, 5,
262 8, 20, 3, 17, 33, 33, 33, 53476 },
46d14a58 263 { INVALID, VALID_40, WLAN_RC_PHY_HT_40_SS, 121500, /* 121.5 Mb */
f078f209
LR		 264 102700, 0x86, 0x00, 6,
265 8, 23, 3, 18, 34, 34, 34, 60156 },
46d14a58 266 { INVALID, VALID_40, WLAN_RC_PHY_HT_40_SS, 135000, /* 135 Mb */
f078f209
LR		 267 112000, 0x87, 0x00, 7,
268 8, 23, 3, 19, 35, 36, 36, 66840 },
46d14a58 269 { INVALID, VALID_40, WLAN_RC_PHY_HT_40_SS_HGI, 150000, /* 150 Mb */
f078f209
LR		 270 122000, 0x87, 0x00, 7,
271 8, 25, 3, 19, 35, 36, 36, 74200 },
46d14a58 272 { INVALID, INVALID, WLAN_RC_PHY_HT_40_DS, 27000, /* 27 Mb */
f078f209
LR		 273 25800, 0x88, 0x00, 8,
274 8, 2, 3, 20, 37, 37, 37, 13360 },
46d14a58 275 { INVALID, INVALID, WLAN_RC_PHY_HT_40_DS, 54000, /* 54 Mb */
f078f209
LR		 276 49800, 0x89, 0x00, 9,
277 8, 4, 3, 21, 38, 38, 38, 26720 },
46d14a58 278 { INVALID, INVALID, WLAN_RC_PHY_HT_40_DS, 81000, /* 81 Mb */
f078f209
LR		 279 71900, 0x8a, 0x00, 10,
280 8, 6, 3, 22, 39, 39, 39, 40080 },
46d14a58 281 { VALID_40, INVALID, WLAN_RC_PHY_HT_40_DS, 108000, /* 108 Mb */
f078f209
LR		 282 92500, 0x8b, 0x00, 11,
283 8, 10, 3, 23, 40, 40, 40, 53440 },
46d14a58 284 { VALID_40, INVALID, WLAN_RC_PHY_HT_40_DS, 162000, /* 162 Mb */
f078f209
LR		 285 130300, 0x8c, 0x00, 12,
286 8, 14, 3, 24, 41, 41, 41, 80160 },
46d14a58 287 { VALID_40, INVALID, WLAN_RC_PHY_HT_40_DS, 216000, /* 216 Mb */
f078f209
LR		 288 162800, 0x8d, 0x00, 13,
289 8, 20, 3, 25, 42, 42, 42, 106880 },
46d14a58 290 { VALID_40, INVALID, WLAN_RC_PHY_HT_40_DS, 243000, /* 243 Mb */
f078f209
LR		 291 178200, 0x8e, 0x00, 14,
292 8, 23, 3, 26, 43, 43, 43, 120240 },
46d14a58 293 { VALID_40, INVALID, WLAN_RC_PHY_HT_40_DS, 270000, /* 270 Mb */
f078f209
LR		 294 192100, 0x8f, 0x00, 15,
295 8, 23, 3, 27, 44, 45, 45, 133600 },
46d14a58 296 { VALID_40, INVALID, WLAN_RC_PHY_HT_40_DS_HGI, 300000, /* 300 Mb */
f078f209
LR		 297 207000, 0x8f, 0x00, 15,
298 8, 25, 3, 27, 44, 45, 45, 148400 },
299 },
300 50, /* probe interval */
301 50, /* rssi reduce interval */
302 WLAN_RC_HT_FLAG, /* Phy rates allowed initially */
303};
304
305static struct ath_rate_table ar5416_11a_ratetable = {
306 8,
307 {
46d14a58 308 { VALID, VALID, WLAN_RC_PHY_OFDM, 6000, /* 6 Mb */
f078f209
LR		 309 5400, 0x0b, 0x00, (0x80|12),
310 0, 2, 1, 0, 0 },
46d14a58 311 { VALID, VALID, WLAN_RC_PHY_OFDM, 9000, /* 9 Mb */
f078f209
LR		 312 7800, 0x0f, 0x00, 18,
313 0, 3, 1, 1, 0 },
46d14a58 314 { VALID, VALID, WLAN_RC_PHY_OFDM, 12000, /* 12 Mb */
f078f209
LR		 315 10000, 0x0a, 0x00, (0x80|24),
316 2, 4, 2, 2, 0 },
46d14a58 317 { VALID, VALID, WLAN_RC_PHY_OFDM, 18000, /* 18 Mb */
f078f209
LR		 318 13900, 0x0e, 0x00, 36,
319 2, 6, 2, 3, 0 },
46d14a58 320 { VALID, VALID, WLAN_RC_PHY_OFDM, 24000, /* 24 Mb */
f078f209
LR		 321 17300, 0x09, 0x00, (0x80|48),
322 4, 10, 3, 4, 0 },
46d14a58 323 { VALID, VALID, WLAN_RC_PHY_OFDM, 36000, /* 36 Mb */
f078f209
LR		 324 23000, 0x0d, 0x00, 72,
325 4, 14, 3, 5, 0 },
46d14a58 326 { VALID, VALID, WLAN_RC_PHY_OFDM, 48000, /* 48 Mb */
f078f209
LR		 327 27400, 0x08, 0x00, 96,
328 4, 19, 3, 6, 0 },
46d14a58 329 { VALID, VALID, WLAN_RC_PHY_OFDM, 54000, /* 54 Mb */
f078f209
LR		 330 29300, 0x0c, 0x00, 108,
331 4, 23, 3, 7, 0 },
332 },
333 50, /* probe interval */
334 50, /* rssi reduce interval */
335 0, /* Phy rates allowed initially */
336};
337
f078f209
LR		 338static struct ath_rate_table ar5416_11g_ratetable = {
339 12,
340 {
46d14a58 341 { VALID, VALID, WLAN_RC_PHY_CCK, 1000, /* 1 Mb */
f078f209
LR		 342 900, 0x1b, 0x00, 2,
343 0, 0, 1, 0, 0 },
46d14a58 344 { VALID, VALID, WLAN_RC_PHY_CCK, 2000, /* 2 Mb */
f078f209
LR		 345 1900, 0x1a, 0x04, 4,
346 1, 1, 1, 1, 0 },
46d14a58 347 { VALID, VALID, WLAN_RC_PHY_CCK, 5500, /* 5.5 Mb */
f078f209
LR		 348 4900, 0x19, 0x04, 11,
349 2, 2, 2, 2, 0 },
46d14a58 350 { VALID, VALID, WLAN_RC_PHY_CCK, 11000, /* 11 Mb */
f078f209
LR		 351 8100, 0x18, 0x04, 22,
352 3, 3, 2, 3, 0 },
46d14a58 353 { INVALID, INVALID, WLAN_RC_PHY_OFDM, 6000, /* 6 Mb */
f078f209
LR		 354 5400, 0x0b, 0x00, 12,
355 4, 2, 1, 4, 0 },
46d14a58 356 { INVALID, INVALID, WLAN_RC_PHY_OFDM, 9000, /* 9 Mb */
f078f209
LR		 357 7800, 0x0f, 0x00, 18,
358 4, 3, 1, 5, 0 },
46d14a58 359 { VALID, VALID, WLAN_RC_PHY_OFDM, 12000, /* 12 Mb */
f078f209
LR		 360 10000, 0x0a, 0x00, 24,
361 6, 4, 1, 6, 0 },
46d14a58 362 { VALID, VALID, WLAN_RC_PHY_OFDM, 18000, /* 18 Mb */
f078f209
LR		 363 13900, 0x0e, 0x00, 36,
364 6, 6, 2, 7, 0 },
46d14a58 365 { VALID, VALID, WLAN_RC_PHY_OFDM, 24000, /* 24 Mb */
f078f209
LR		 366 17300, 0x09, 0x00, 48,
367 8, 10, 3, 8, 0 },
46d14a58 368 { VALID, VALID, WLAN_RC_PHY_OFDM, 36000, /* 36 Mb */
f078f209
LR		 369 23000, 0x0d, 0x00, 72,
370 8, 14, 3, 9, 0 },
46d14a58 371 { VALID, VALID, WLAN_RC_PHY_OFDM, 48000, /* 48 Mb */
f078f209
LR		 372 27400, 0x08, 0x00, 96,
373 8, 19, 3, 10, 0 },
46d14a58 374 { VALID, VALID, WLAN_RC_PHY_OFDM, 54000, /* 54 Mb */
f078f209
LR		 375 29300, 0x0c, 0x00, 108,
376 8, 23, 3, 11, 0 },
377 },
378 50, /* probe interval */
379 50, /* rssi reduce interval */
380 0, /* Phy rates allowed initially */
381};
382
383static struct ath_rate_table ar5416_11b_ratetable = {
384 4,
385 {
46d14a58 386 { VALID, VALID, WLAN_RC_PHY_CCK, 1000, /* 1 Mb */
f078f209
LR		 387 900, 0x1b, 0x00, (0x80|2),
388 0, 0, 1, 0, 0 },
46d14a58 389 { VALID, VALID, WLAN_RC_PHY_CCK, 2000, /* 2 Mb */
f078f209
LR		 390 1800, 0x1a, 0x04, (0x80|4),
391 1, 1, 1, 1, 0 },
46d14a58 392 { VALID, VALID, WLAN_RC_PHY_CCK, 5500, /* 5.5 Mb */
f078f209
LR		 393 4300, 0x19, 0x04, (0x80|11),
394 1, 2, 2, 2, 0 },
46d14a58 395 { VALID, VALID, WLAN_RC_PHY_CCK, 11000, /* 11 Mb */
f078f209
LR		 396 7100, 0x18, 0x04, (0x80|22),
397 1, 4, 100, 3, 0 },
398 },
399 100, /* probe interval */
400 100, /* rssi reduce interval */
401 0, /* Phy rates allowed initially */
402};
403
f078f209
LR		 404static inline int8_t median(int8_t a, int8_t b, int8_t c)
405{
406 if (a >= b) {
407 if (b >= c)
408 return b;
409 else if (a > c)
410 return c;
411 else
412 return a;
413 } else {
414 if (a >= c)
415 return a;
416 else if (b >= c)
417 return c;
418 else
419 return b;
420 }
421}
422
fe7f4a77 423static void ath_rc_sort_validrates(struct ath_rate_table *rate_table,
46d14a58 424 struct ath_rate_priv *ath_rc_priv)
f078f209
LR		 425{
426 u8 i, j, idx, idx_next;
427
256b7759 428 for (i = ath_rc_priv->max_valid_rate - 1; i > 0; i--) {
f078f209 429 for (j = 0; j <= i-1; j++) {
256b7759
S		 430 idx = ath_rc_priv->valid_rate_index[j];
431 idx_next = ath_rc_priv->valid_rate_index[j+1];
f078f209
LR		 432
433 if (rate_table->info[idx].ratekbps >
434 rate_table->info[idx_next].ratekbps) {
256b7759
S		 435 ath_rc_priv->valid_rate_index[j] = idx_next;
436 ath_rc_priv->valid_rate_index[j+1] = idx;
f078f209
LR		 437 }
438 }
439 }
440}
441
46d14a58 442static void ath_rc_init_valid_txmask(struct ath_rate_priv *ath_rc_priv)
f078f209
LR		 443{
444 u8 i;
445
256b7759 446 for (i = 0; i < ath_rc_priv->rate_table_size; i++)
46d14a58 447 ath_rc_priv->valid_rate_index[i] = 0;
f078f209
LR		 448}
449
46d14a58 450static inline void ath_rc_set_valid_txmask(struct ath_rate_priv *ath_rc_priv,
f078f209
LR		 451 u8 index, int valid_tx_rate)
452{
256b7759 453 ASSERT(index <= ath_rc_priv->rate_table_size);
46d14a58 454 ath_rc_priv->valid_rate_index[index] = valid_tx_rate ? 1 : 0;
f078f209
LR		 455}
456
46d14a58 457static inline int ath_rc_isvalid_txmask(struct ath_rate_priv *ath_rc_priv,
f078f209
LR		 458 u8 index)
459{
256b7759
S		 460 ASSERT(index <= ath_rc_priv->rate_table_size);
461 return ath_rc_priv->valid_rate_index[index];
f078f209
LR		 462}
463
2c5a744d
S		 464static inline int ath_rc_get_nextvalid_txrate(struct ath_rate_table *rate_table,
465 struct ath_rate_priv *ath_rc_priv,
466 u8 cur_valid_txrate,
467 u8 *next_idx)
f078f209
LR		 468{
469 u8 i;
470
256b7759
S		 471 for (i = 0; i < ath_rc_priv->max_valid_rate - 1; i++) {
472 if (ath_rc_priv->valid_rate_index[i] == cur_valid_txrate) {
473 *next_idx = ath_rc_priv->valid_rate_index[i+1];
46d14a58 474 return 1;
f078f209
LR		 475 }
476 }
477
478 /* No more valid rates */
479 *next_idx = 0;
2c5a744d 480
46d14a58 481 return 0;
f078f209
LR		 482}
483
484/* Return true only for single stream */
485
486static int ath_rc_valid_phyrate(u32 phy, u32 capflag, int ignore_cw)
487{
b657eade 488 if (WLAN_RC_PHY_HT(phy) && !(capflag & WLAN_RC_HT_FLAG))
46d14a58 489 return 0;
f078f209 490 if (WLAN_RC_PHY_DS(phy) && !(capflag & WLAN_RC_DS_FLAG))
46d14a58 491 return 0;
f078f209 492 if (WLAN_RC_PHY_SGI(phy) && !(capflag & WLAN_RC_SGI_FLAG))
46d14a58 493 return 0;
f078f209
LR		 494 if (!ignore_cw && WLAN_RC_PHY_HT(phy))
495 if (WLAN_RC_PHY_40(phy) && !(capflag & WLAN_RC_40_FLAG))
46d14a58 496 return 0;
f078f209 497 if (!WLAN_RC_PHY_40(phy) && (capflag & WLAN_RC_40_FLAG))
46d14a58
S		 498 return 0;
499 return 1;
f078f209
LR		 500}
501
502static inline int
fe7f4a77 503ath_rc_get_nextlowervalid_txrate(struct ath_rate_table *rate_table,
46d14a58 504 struct ath_rate_priv *ath_rc_priv,
f078f209
LR		 505 u8 cur_valid_txrate, u8 *next_idx)
506{
507 int8_t i;
508
256b7759
S		 509 for (i = 1; i < ath_rc_priv->max_valid_rate ; i++) {
510 if (ath_rc_priv->valid_rate_index[i] == cur_valid_txrate) {
511 *next_idx = ath_rc_priv->valid_rate_index[i-1];
46d14a58 512 return 1;
f078f209
LR		 513 }
514 }
2c5a744d 515
46d14a58 516 return 0;
f078f209
LR		 517}
518
2c5a744d
S		 519static u8 ath_rc_init_validrates(struct ath_rate_priv *ath_rc_priv,
520 struct ath_rate_table *rate_table,
521 u32 capflag)
f078f209 522{
f078f209
LR		 523 u8 i, hi = 0;
524 u32 valid;
525
f078f209
LR		 526 for (i = 0; i < rate_table->rate_cnt; i++) {
527 valid = (ath_rc_priv->single_stream ?
dc2222a8
S		 528 rate_table->info[i].valid_single_stream :
529 rate_table->info[i].valid);
46d14a58 530 if (valid == 1) {
f078f209
LR		 531 u32 phy = rate_table->info[i].phy;
532 u8 valid_rate_count = 0;
533
46d14a58 534 if (!ath_rc_valid_phyrate(phy, capflag, 0))
f078f209
LR		 535 continue;
536
256b7759 537 valid_rate_count = ath_rc_priv->valid_phy_ratecnt[phy];
f078f209 538
256b7759
S		 539 ath_rc_priv->valid_phy_rateidx[phy][valid_rate_count] = i;
540 ath_rc_priv->valid_phy_ratecnt[phy] += 1;
46d14a58 541 ath_rc_set_valid_txmask(ath_rc_priv, i, 1);
f078f209
LR		 542 hi = A_MAX(hi, i);
543 }
544 }
2c5a744d 545
f078f209
LR		 546 return hi;
547}
548
2c5a744d
S		 549static u8 ath_rc_setvalid_rates(struct ath_rate_priv *ath_rc_priv,
550 struct ath_rate_table *rate_table,
551 struct ath_rateset *rateset,
552 u32 capflag)
f078f209 553{
f078f209 554 u8 i, j, hi = 0;
f078f209
LR		 555
556 /* Use intersection of working rates and valid rates */
557 for (i = 0; i < rateset->rs_nrates; i++) {
558 for (j = 0; j < rate_table->rate_cnt; j++) {
559 u32 phy = rate_table->info[j].phy;
560 u32 valid = (ath_rc_priv->single_stream ?
561 rate_table->info[j].valid_single_stream :
562 rate_table->info[j].valid);
2c5a744d
S		 563 u8 rate = rateset->rs_rates[i];
564 u8 dot11rate = rate_table->info[j].dot11rate;
f078f209
LR		 565
566 /* We allow a rate only if its valid and the
567 * capflag matches one of the validity
46d14a58 568 * (VALID/VALID_20/VALID_40) flags */
f078f209 569
2c5a744d
S		 570 if (((rate & 0x7F) == (dot11rate & 0x7F)) &&
571 ((valid & WLAN_RC_CAP_MODE(capflag)) ==
572 WLAN_RC_CAP_MODE(capflag)) &&
573 !WLAN_RC_PHY_HT(phy)) {
f078f209
LR		 574 u8 valid_rate_count = 0;
575
46d14a58 576 if (!ath_rc_valid_phyrate(phy, capflag, 0))
f078f209
LR		 577 continue;
578
579 valid_rate_count =
256b7759 580 ath_rc_priv->valid_phy_ratecnt[phy];
f078f209 581
256b7759 582 ath_rc_priv->valid_phy_rateidx[phy]
f078f209 583 [valid_rate_count] = j;
256b7759 584 ath_rc_priv->valid_phy_ratecnt[phy] += 1;
46d14a58 585 ath_rc_set_valid_txmask(ath_rc_priv, j, 1);
f078f209
LR		 586 hi = A_MAX(hi, j);
587 }
588 }
589 }
2c5a744d 590
f078f209
LR		 591 return hi;
592}
593
2c5a744d
S		 594static u8 ath_rc_setvalid_htrates(struct ath_rate_priv *ath_rc_priv,
595 struct ath_rate_table *rate_table,
596 u8 *mcs_set, u32 capflag)
f078f209 597{
2c5a744d
S		 598 struct ath_rateset *rateset = (struct ath_rateset *)mcs_set;
599
f078f209 600 u8 i, j, hi = 0;
f078f209
LR		 601
602 /* Use intersection of working rates and valid rates */
2c5a744d 603 for (i = 0; i < rateset->rs_nrates; i++) {
f078f209
LR		 604 for (j = 0; j < rate_table->rate_cnt; j++) {
605 u32 phy = rate_table->info[j].phy;
606 u32 valid = (ath_rc_priv->single_stream ?
dc2222a8
S		 607 rate_table->info[j].valid_single_stream :
608 rate_table->info[j].valid);
2c5a744d
S		 609 u8 rate = rateset->rs_rates[i];
610 u8 dot11rate = rate_table->info[j].dot11rate;
f078f209 611
2c5a744d 612 if (((rate & 0x7F) != (dot11rate & 0x7F)) ||
dc2222a8
S		 613 !WLAN_RC_PHY_HT(phy) ||
614 !WLAN_RC_PHY_HT_VALID(valid, capflag))
f078f209
LR		 615 continue;
616
46d14a58 617 if (!ath_rc_valid_phyrate(phy, capflag, 0))
f078f209
LR		 618 continue;
619
256b7759
S		 620 ath_rc_priv->valid_phy_rateidx[phy]
621 [ath_rc_priv->valid_phy_ratecnt[phy]] = j;
622 ath_rc_priv->valid_phy_ratecnt[phy] += 1;
46d14a58 623 ath_rc_set_valid_txmask(ath_rc_priv, j, 1);
f078f209
LR		 624 hi = A_MAX(hi, j);
625 }
626 }
f078f209 627
2c5a744d 628 return hi;
f078f209
LR		 629}
630
f078f209 631static u8 ath_rc_ratefind_ht(struct ath_softc *sc,
46d14a58 632 struct ath_rate_priv *ath_rc_priv,
fe7f4a77 633 struct ath_rate_table *rate_table,
3900898c 634 int *is_probing)
f078f209
LR		 635{
636 u32 dt, best_thruput, this_thruput, now_msec;
637 u8 rate, next_rate, best_rate, maxindex, minindex;
638 int8_t rssi_last, rssi_reduce = 0, index = 0;
f078f209 639
46d14a58 640 *is_probing = 0;
f078f209 641
256b7759
S		 642 rssi_last = median(ath_rc_priv->rssi_last,
643 ath_rc_priv->rssi_last_prev,
644 ath_rc_priv->rssi_last_prev2);
f078f209
LR		 645
646 /*
647 * Age (reduce) last ack rssi based on how old it is.
648 * The bizarre numbers are so the delta is 160msec,
649 * meaning we divide by 16.
650 * 0msec <= dt <= 25msec: don't derate
651 * 25msec <= dt <= 185msec: derate linearly from 0 to 10dB
652 * 185msec <= dt: derate by 10dB
653 */
654
655 now_msec = jiffies_to_msecs(jiffies);
256b7759 656 dt = now_msec - ath_rc_priv->rssi_time;
f078f209
LR		 657
658 if (dt >= 185)
659 rssi_reduce = 10;
660 else if (dt >= 25)
661 rssi_reduce = (u8)((dt - 25) >> 4);
662
663 /* Now reduce rssi_last by rssi_reduce */
664 if (rssi_last < rssi_reduce)
665 rssi_last = 0;
666 else
667 rssi_last -= rssi_reduce;
668
669 /*
670 * Now look up the rate in the rssi table and return it.
671 * If no rates match then we return 0 (lowest rate)
672 */
673
674 best_thruput = 0;
256b7759 675 maxindex = ath_rc_priv->max_valid_rate-1;
f078f209
LR		 676
677 minindex = 0;
678 best_rate = minindex;
679
680 /*
681 * Try the higher rate first. It will reduce memory moving time
682 * if we have very good channel characteristics.
683 */
684 for (index = maxindex; index >= minindex ; index--) {
685 u8 per_thres;
686
256b7759
S		 687 rate = ath_rc_priv->valid_rate_index[index];
688 if (rate > ath_rc_priv->rate_max_phy)
f078f209
LR		 689 continue;
690
691 /*
692 * For TCP the average collision rate is around 11%,
693 * so we ignore PERs less than this. This is to
694 * prevent the rate we are currently using (whose
695 * PER might be in the 10-15 range because of TCP
696 * collisions) looking worse than the next lower
697 * rate whose PER has decayed close to 0. If we
698 * used to next lower rate, its PER would grow to
699 * 10-15 and we would be worse off then staying
700 * at the current rate.
701 */
256b7759 702 per_thres = ath_rc_priv->state[rate].per;
f078f209
LR		 703 if (per_thres < 12)
704 per_thres = 12;
705
706 this_thruput = rate_table->info[rate].user_ratekbps *
707 (100 - per_thres);
708
709 if (best_thruput <= this_thruput) {
710 best_thruput = this_thruput;
711 best_rate = rate;
712 }
713 }
714
715 rate = best_rate;
256b7759 716 ath_rc_priv->rssi_last_lookup = rssi_last;
f078f209
LR		 717
718 /*
719 * Must check the actual rate (ratekbps) to account for
720 * non-monoticity of 11g's rate table
721 */
722
3900898c 723 if (rate >= ath_rc_priv->rate_max_phy) {
256b7759 724 rate = ath_rc_priv->rate_max_phy;
f078f209
LR		 725
726 /* Probe the next allowed phy state */
f078f209 727 if (ath_rc_get_nextvalid_txrate(rate_table,
3900898c 728 ath_rc_priv, rate, &next_rate) &&
256b7759 729 (now_msec - ath_rc_priv->probe_time >
f078f209 730 rate_table->probe_interval) &&
256b7759 731 (ath_rc_priv->hw_maxretry_pktcnt >= 1)) {
f078f209 732 rate = next_rate;
256b7759
S		 733 ath_rc_priv->probe_rate = rate;
734 ath_rc_priv->probe_time = now_msec;
735 ath_rc_priv->hw_maxretry_pktcnt = 0;
46d14a58 736 *is_probing = 1;
f078f209
LR		 737 }
738 }
739
256b7759
S		 740 if (rate > (ath_rc_priv->rate_table_size - 1))
741 rate = ath_rc_priv->rate_table_size - 1;
f078f209
LR		 742
743 ASSERT((rate_table->info[rate].valid && !ath_rc_priv->single_stream) ||
dc2222a8
S		 744 (rate_table->info[rate].valid_single_stream &&
745 ath_rc_priv->single_stream));
f078f209
LR		 746
747 return rate;
748}
749
c89424df 750static void ath_rc_rate_set_series(struct ath_rate_table *rate_table,
a8efee4f 751 struct ieee80211_tx_rate *rate,
c89424df 752 struct ieee80211_tx_rate_control *txrc,
2c5a744d 753 u8 tries, u8 rix, int rtsctsenable)
f078f209 754{
a8efee4f
S		 755 rate->count = tries;
756 rate->idx = rix;
757
c89424df
S		 758 if (txrc->short_preamble)
759 rate->flags |= IEEE80211_TX_RC_USE_SHORT_PREAMBLE;
760 if (txrc->rts || rtsctsenable)
a8efee4f
S		 761 rate->flags |= IEEE80211_TX_RC_USE_RTS_CTS;
762 if (WLAN_RC_PHY_40(rate_table->info[rix].phy))
763 rate->flags |= IEEE80211_TX_RC_40_MHZ_WIDTH;
764 if (WLAN_RC_PHY_SGI(rate_table->info[rix].phy))
765 rate->flags |= IEEE80211_TX_RC_SHORT_GI;
766 if (WLAN_RC_PHY_HT(rate_table->info[rix].phy))
767 rate->flags |= IEEE80211_TX_RC_MCS;
f078f209
LR		 768}
769
c89424df
S		 770static void ath_rc_rate_set_rtscts(struct ath_softc *sc,
771 struct ath_rate_table *rate_table,
772 struct ieee80211_tx_info *tx_info)
773{
774 struct ieee80211_tx_rate *rates = tx_info->control.rates;
775 int i = 0, rix = 0, cix, enable_g_protection = 0;
776
777 /* get the cix for the lowest valid rix */
778 for (i = 3; i >= 0; i--) {
779 if (rates[i].count && (rates[i].idx >= 0)) {
780 rix = rates[i].idx;
781 break;
782 }
783 }
784 cix = rate_table->info[rix].ctrl_rate;
785
786 /* All protection frames are transmited at 2Mb/s for 802.11g,
787 * otherwise we transmit them at 1Mb/s */
788 if (sc->hw->conf.channel->band == IEEE80211_BAND_2GHZ &&
789 !conf_is_ht(&sc->hw->conf))
790 enable_g_protection = 1;
791
792 /*
793 * If 802.11g protection is enabled, determine whether to use RTS/CTS or
794 * just CTS. Note that this is only done for OFDM/HT unicast frames.
795 */
796 if ((sc->sc_flags & SC_OP_PROTECT_ENABLE) &&
797 !(tx_info->flags & IEEE80211_TX_CTL_NO_ACK) &&
798 (rate_table->info[rix].phy == WLAN_RC_PHY_OFDM ||
799 WLAN_RC_PHY_HT(rate_table->info[rix].phy))) {
800 rates[0].flags |= IEEE80211_TX_RC_USE_CTS_PROTECT;
801 cix = rate_table->info[enable_g_protection].ctrl_rate;
802 }
803
804 tx_info->control.rts_cts_rate_idx = cix;
805}
806
f078f209 807static u8 ath_rc_rate_getidx(struct ath_softc *sc,
46d14a58 808 struct ath_rate_priv *ath_rc_priv,
fe7f4a77 809 struct ath_rate_table *rate_table,
dc2222a8
S		 810 u8 rix, u16 stepdown,
811 u16 min_rate)
f078f209
LR		 812{
813 u32 j;
814 u8 nextindex;
f078f209
LR		 815
816 if (min_rate) {
817 for (j = RATE_TABLE_SIZE; j > 0; j--) {
818 if (ath_rc_get_nextlowervalid_txrate(rate_table,
256b7759 819 ath_rc_priv, rix, &nextindex))
f078f209
LR		 820 rix = nextindex;
821 else
822 break;
823 }
824 } else {
825 for (j = stepdown; j > 0; j--) {
826 if (ath_rc_get_nextlowervalid_txrate(rate_table,
256b7759 827 ath_rc_priv, rix, &nextindex))
f078f209
LR		 828 rix = nextindex;
829 else
830 break;
831 }
832 }
833 return rix;
834}
835
836static void ath_rc_ratefind(struct ath_softc *sc,
46d14a58 837 struct ath_rate_priv *ath_rc_priv,
3900898c 838 struct ieee80211_tx_rate_control *txrc)
f078f209 839{
f078f209 840 struct ath_rate_table *rate_table;
3900898c
S		 841 struct sk_buff *skb = txrc->skb;
842 struct ieee80211_tx_info *tx_info = IEEE80211_SKB_CB(skb);
a8efee4f 843 struct ieee80211_tx_rate *rates = tx_info->control.rates;
c89424df
S		 844 struct ieee80211_hdr *hdr = (struct ieee80211_hdr *)skb->data;
845 __le16 fc = hdr->frame_control;
3900898c
S		 846 u8 try_per_rate = 0, i = 0, rix, nrix;
847 int is_probe = 0;
f078f209 848
40990ec0 849 rate_table = sc->cur_rate_table;
3900898c 850 rix = ath_rc_ratefind_ht(sc, ath_rc_priv, rate_table, &is_probe);
f078f209
LR		 851 nrix = rix;
852
3900898c 853 if (is_probe) {
f078f209
LR		 854 /* set one try for probe rates. For the
855 * probes don't enable rts */
c89424df 856 ath_rc_rate_set_series(rate_table, &rates[i++], txrc,
3900898c 857 1, nrix, 0);
f078f209 858
3900898c 859 try_per_rate = (ATH_11N_TXMAXTRY/4);
f078f209
LR		 860 /* Get the next tried/allowed rate. No RTS for the next series
861 * after the probe rate
862 */
3900898c
S		 863 nrix = ath_rc_rate_getidx(sc, ath_rc_priv,
864 rate_table, nrix, 1, 0);
c89424df 865 ath_rc_rate_set_series(rate_table, &rates[i++], txrc,
3900898c 866 try_per_rate, nrix, 0);
14587ce2
VT		 867
868 tx_info->flags |= IEEE80211_TX_CTL_RATE_CTRL_PROBE;
f078f209 869 } else {
3900898c 870 try_per_rate = (ATH_11N_TXMAXTRY/4);
f078f209 871 /* Set the choosen rate. No RTS for first series entry. */
c89424df 872 ath_rc_rate_set_series(rate_table, &rates[i++], txrc,
3900898c 873 try_per_rate, nrix, 0);
f078f209
LR		 874 }
875
876 /* Fill in the other rates for multirate retry */
3900898c 877 for ( ; i < 4; i++) {
f078f209
LR		 878 u8 try_num;
879 u8 min_rate;
880
3900898c
S		 881 try_num = ((i + 1) == 4) ?
882 ATH_11N_TXMAXTRY - (try_per_rate * i) : try_per_rate ;
883 min_rate = (((i + 1) == 4) && 0);
f078f209
LR		 884
885 nrix = ath_rc_rate_getidx(sc, ath_rc_priv,
dc2222a8 886 rate_table, nrix, 1, min_rate);
f078f209 887 /* All other rates in the series have RTS enabled */
c89424df 888 ath_rc_rate_set_series(rate_table, &rates[i], txrc,
3900898c 889 try_num, nrix, 1);
f078f209
LR		 890 }
891
892 /*
893 * NB:Change rate series to enable aggregation when operating
894 * at lower MCS rates. When first rate in series is MCS2
895 * in HT40 @ 2.4GHz, series should look like:
896 *
897 * {MCS2, MCS1, MCS0, MCS0}.
898 *
899 * When first rate in series is MCS3 in HT20 @ 2.4GHz, series should
900 * look like:
901 *
902 * {MCS3, MCS2, MCS1, MCS1}
903 *
904 * So, set fourth rate in series to be same as third one for
905 * above conditions.
906 */
3706de6f 907 if ((sc->hw->conf.channel->band == IEEE80211_BAND_2GHZ) &&
ecf70441 908 (conf_is_ht(&sc->hw->conf))) {
40990ec0 909 u8 dot11rate = rate_table->info[rix].dot11rate;
f078f209
LR		 910 u8 phy = rate_table->info[rix].phy;
911 if (i == 4 &&
912 ((dot11rate == 2 && phy == WLAN_RC_PHY_HT_40_SS) ||
dc2222a8 913 (dot11rate == 3 && phy == WLAN_RC_PHY_HT_20_SS))) {
a8efee4f
S		 914 rates[3].idx = rates[2].idx;
915 rates[3].flags = rates[2].flags;
f078f209
LR		 916 }
917 }
c89424df
S		 918
919 /*
920 * Force hardware to use computed duration for next
921 * fragment by disabling multi-rate retry, which
922 * updates duration based on the multi-rate duration table.
923 *
924 * FIXME: Fix duration
925 */
926 if (!(tx_info->flags & IEEE80211_TX_CTL_NO_ACK) &&
927 (ieee80211_has_morefrags(fc) ||
928 (le16_to_cpu(hdr->seq_ctrl) & IEEE80211_SCTL_FRAG))) {
929 rates[1].count = rates[2].count = rates[3].count = 0;
930 rates[1].idx = rates[2].idx = rates[3].idx = 0;
931 rates[0].count = ATH_TXMAXTRY;
932 }
933
934 /* Setup RTS/CTS */
935 ath_rc_rate_set_rtscts(sc, rate_table, tx_info);
f078f209
LR		 936}
937
2c5a744d
S		 938static bool ath_rc_update_per(struct ath_softc *sc,
939 struct ath_rate_table *rate_table,
940 struct ath_rate_priv *ath_rc_priv,
941 struct ath_tx_info_priv *tx_info_priv,
942 int tx_rate, int xretries, int retries,
943 u32 now_msec)
f078f209 944{
2c5a744d
S		 945 bool state_change = false;
946 int count;
f078f209 947 u8 last_per;
f078f209
LR		 948 static u32 nretry_to_per_lookup[10] = {
949 100 * 0 / 1,
950 100 * 1 / 4,
951 100 * 1 / 2,
952 100 * 3 / 4,
953 100 * 4 / 5,
954 100 * 5 / 6,
955 100 * 6 / 7,
956 100 * 7 / 8,
957 100 * 8 / 9,
958 100 * 9 / 10
959 };
960
256b7759 961 last_per = ath_rc_priv->state[tx_rate].per;
f078f209
LR		 962
963 if (xretries) {
f078f209 964 if (xretries == 1) {
256b7759
S		 965 ath_rc_priv->state[tx_rate].per += 30;
966 if (ath_rc_priv->state[tx_rate].per > 100)
967 ath_rc_priv->state[tx_rate].per = 100;
f078f209
LR		 968 } else {
969 /* xretries == 2 */
87c1687d 970 count = ARRAY_SIZE(nretry_to_per_lookup);
f078f209
LR		 971 if (retries >= count)
972 retries = count - 1;
2c5a744d 973
f078f209 974 /* new_PER = 7/8*old_PER + 1/8*(currentPER) */
256b7759 975 ath_rc_priv->state[tx_rate].per =
2c5a744d 976 (u8)(last_per - (last_per >> 3) + (100 >> 3));
f078f209
LR		 977 }
978
979 /* xretries == 1 or 2 */
980
256b7759
S		 981 if (ath_rc_priv->probe_rate == tx_rate)
982 ath_rc_priv->probe_rate = 0;
f078f209 983
2c5a744d 984 } else { /* xretries == 0 */
87c1687d 985 count = ARRAY_SIZE(nretry_to_per_lookup);
f078f209
LR		 986 if (retries >= count)
987 retries = count - 1;
2c5a744d 988
46d14a58 989 if (tx_info_priv->n_bad_frames) {
dc2222a8 990 /* new_PER = 7/8*old_PER + 1/8*(currentPER)
f078f209
LR		 991 * Assuming that n_frames is not 0. The current PER
992 * from the retries is 100 * retries / (retries+1),
993 * since the first retries attempts failed, and the
994 * next one worked. For the one that worked,
995 * n_bad_frames subframes out of n_frames wored,
996 * so the PER for that part is
997 * 100 * n_bad_frames / n_frames, and it contributes
998 * 100 * n_bad_frames / (n_frames * (retries+1)) to
999 * the above PER. The expression below is a
1000 * simplified version of the sum of these two terms.
1001 */
2c5a744d
S		 1002 if (tx_info_priv->n_frames > 0) {
1003 int n_frames, n_bad_frames;
1004 u8 cur_per, new_per;
1005
1006 n_bad_frames = retries * tx_info_priv->n_frames +
1007 tx_info_priv->n_bad_frames;
1008 n_frames = tx_info_priv->n_frames * (retries + 1);
1009 cur_per = (100 * n_bad_frames / n_frames) >> 3;
1010 new_per = (u8)(last_per - (last_per >> 3) + cur_per);
1011 ath_rc_priv->state[tx_rate].per = new_per;
1012 }
f078f209 1013 } else {
2c5a744d
S		 1014 ath_rc_priv->state[tx_rate].per =
1015 (u8)(last_per - (last_per >> 3) +
1016 (nretry_to_per_lookup[retries] >> 3));
f078f209
LR		 1017 }
1018
256b7759
S		 1019 ath_rc_priv->rssi_last_prev2 = ath_rc_priv->rssi_last_prev;
1020 ath_rc_priv->rssi_last_prev = ath_rc_priv->rssi_last;
46d14a58 1021 ath_rc_priv->rssi_last = tx_info_priv->tx.ts_rssi;
256b7759 1022 ath_rc_priv->rssi_time = now_msec;
f078f209
LR		 1023
1024 /*
1025 * If we got at most one retry then increase the max rate if
1026 * this was a probe. Otherwise, ignore the probe.
1027 */
256b7759 1028 if (ath_rc_priv->probe_rate && ath_rc_priv->probe_rate == tx_rate) {
46d14a58
S		 1029 if (retries > 0 || 2 * tx_info_priv->n_bad_frames >
1030 tx_info_priv->n_frames) {
f078f209
LR		 1031 /*
1032 * Since we probed with just a single attempt,
1033 * any retries means the probe failed. Also,
1034 * if the attempt worked, but more than half
1035 * the subframes were bad then also consider
1036 * the probe a failure.
1037 */
256b7759 1038 ath_rc_priv->probe_rate = 0;
f078f209
LR		 1039 } else {
1040 u8 probe_rate = 0;
1041
2c5a744d
S		 1042 ath_rc_priv->rate_max_phy =
1043 ath_rc_priv->probe_rate;
256b7759 1044 probe_rate = ath_rc_priv->probe_rate;
f078f209 1045
256b7759
S		 1046 if (ath_rc_priv->state[probe_rate].per > 30)
1047 ath_rc_priv->state[probe_rate].per = 20;
f078f209 1048
256b7759 1049 ath_rc_priv->probe_rate = 0;
f078f209
LR		 1050
1051 /*
1052 * Since this probe succeeded, we allow the next
1053 * probe twice as soon. This allows the maxRate
1054 * to move up faster if the probes are
1055 * succesful.
1056 */
2c5a744d
S		 1057 ath_rc_priv->probe_time =
1058 now_msec - rate_table->probe_interval / 2;
f078f209
LR		 1059 }
1060 }
1061
1062 if (retries > 0) {
1063 /*
1064 * Don't update anything. We don't know if
1065 * this was because of collisions or poor signal.
1066 *
1067 * Later: if rssi_ack is close to
256b7759 1068 * ath_rc_priv->state[txRate].rssi_thres and we see lots
f078f209 1069 * of retries, then we could increase
256b7759 1070 * ath_rc_priv->state[txRate].rssi_thres.
f078f209 1071 */
256b7759 1072 ath_rc_priv->hw_maxretry_pktcnt = 0;
f078f209 1073 } else {
2c5a744d
S		 1074 int32_t rssi_ackAvg;
1075 int8_t rssi_thres;
1076 int8_t rssi_ack_vmin;
1077
f078f209
LR		 1078 /*
1079 * It worked with no retries. First ignore bogus (small)
1080 * rssi_ack values.
1081 */
256b7759
S		 1082 if (tx_rate == ath_rc_priv->rate_max_phy &&
1083 ath_rc_priv->hw_maxretry_pktcnt < 255) {
1084 ath_rc_priv->hw_maxretry_pktcnt++;
f078f209
LR		 1085 }
1086
2c5a744d
S		 1087 if (tx_info_priv->tx.ts_rssi <
1088 rate_table->info[tx_rate].rssi_ack_validmin)
1089 goto exit;
f078f209 1090
2c5a744d
S		 1091 /* Average the rssi */
1092 if (tx_rate != ath_rc_priv->rssi_sum_rate) {
1093 ath_rc_priv->rssi_sum_rate = tx_rate;
1094 ath_rc_priv->rssi_sum =
1095 ath_rc_priv->rssi_sum_cnt = 0;
1096 }
1097
1098 ath_rc_priv->rssi_sum += tx_info_priv->tx.ts_rssi;
1099 ath_rc_priv->rssi_sum_cnt++;
1100
1101 if (ath_rc_priv->rssi_sum_cnt < 4)
1102 goto exit;
1103
1104 rssi_ackAvg =
1105 (ath_rc_priv->rssi_sum + 2) / 4;
1106 rssi_thres =
1107 ath_rc_priv->state[tx_rate].rssi_thres;
1108 rssi_ack_vmin =
1109 rate_table->info[tx_rate].rssi_ack_validmin;
1110
1111 ath_rc_priv->rssi_sum =
1112 ath_rc_priv->rssi_sum_cnt = 0;
1113
1114 /* Now reduce the current rssi threshold */
1115 if ((rssi_ackAvg < rssi_thres + 2) &&
1116 (rssi_thres > rssi_ack_vmin)) {
1117 ath_rc_priv->state[tx_rate].rssi_thres--;
f078f209 1118 }
2c5a744d
S		 1119
1120 state_change = true;
f078f209
LR		 1121 }
1122 }
2c5a744d
S		 1123exit:
1124 return state_change;
1125}
1126
1127/* Update PER, RSSI and whatever else that the code thinks it is doing.
1128 If you can make sense of all this, you really need to go out more. */
1129
1130static void ath_rc_update_ht(struct ath_softc *sc,
1131 struct ath_rate_priv *ath_rc_priv,
1132 struct ath_tx_info_priv *tx_info_priv,
1133 int tx_rate, int xretries, int retries)
1134{
1135#define CHK_RSSI(rate) \
1136 ((ath_rc_priv->state[(rate)].rssi_thres + \
1137 rate_table->info[(rate)].rssi_ack_deltamin) > \
1138 ath_rc_priv->state[(rate)+1].rssi_thres)
1139
1140 u32 now_msec = jiffies_to_msecs(jiffies);
1141 int rate;
1142 u8 last_per;
1143 bool state_change = false;
40990ec0 1144 struct ath_rate_table *rate_table = sc->cur_rate_table;
2c5a744d
S		 1145 int size = ath_rc_priv->rate_table_size;
1146
1147 if ((tx_rate < 0) || (tx_rate > rate_table->rate_cnt))
1148 return;
f078f209 1149
2c5a744d
S		 1150 /* To compensate for some imbalance between ctrl and ext. channel */
1151
1152 if (WLAN_RC_PHY_40(rate_table->info[tx_rate].phy))
1153 tx_info_priv->tx.ts_rssi =
1154 tx_info_priv->tx.ts_rssi < 3 ? 0 :
1155 tx_info_priv->tx.ts_rssi - 3;
1156
1157 last_per = ath_rc_priv->state[tx_rate].per;
1158
1159 /* Update PER first */
1160 state_change = ath_rc_update_per(sc, rate_table, ath_rc_priv,
1161 tx_info_priv, tx_rate, xretries,
1162 retries, now_msec);
f078f209
LR		 1163
1164 /*
1165 * If this rate looks bad (high PER) then stop using it for
1166 * a while (except if we are probing).
1167 */
256b7759 1168 if (ath_rc_priv->state[tx_rate].per >= 55 && tx_rate > 0 &&
dc2222a8 1169 rate_table->info[tx_rate].ratekbps <=
256b7759
S		 1170 rate_table->info[ath_rc_priv->rate_max_phy].ratekbps) {
1171 ath_rc_get_nextlowervalid_txrate(rate_table, ath_rc_priv,
2c5a744d 1172 (u8)tx_rate, &ath_rc_priv->rate_max_phy);
f078f209
LR		 1173
1174 /* Don't probe for a little while. */
256b7759 1175 ath_rc_priv->probe_time = now_msec;
f078f209
LR		 1176 }
1177
1178 if (state_change) {
1179 /*
1180 * Make sure the rates above this have higher rssi thresholds.
1181 * (Note: Monotonicity is kept within the OFDM rates and
1182 * within the CCK rates. However, no adjustment is
1183 * made to keep the rssi thresholds monotonically
1184 * increasing between the CCK and OFDM rates.)
1185 */
2c5a744d 1186 for (rate = tx_rate; rate < size - 1; rate++) {
f078f209 1187 if (rate_table->info[rate+1].phy !=
2c5a744d 1188 rate_table->info[tx_rate].phy)
f078f209
LR		 1189 break;
1190
2c5a744d 1191 if (CHK_RSSI(rate)) {
256b7759 1192 ath_rc_priv->state[rate+1].rssi_thres =
2c5a744d
S		 1193 ath_rc_priv->state[rate].rssi_thres +
1194 rate_table->info[rate].rssi_ack_deltamin;
f078f209
LR		 1195 }
1196 }
1197
1198 /* Make sure the rates below this have lower rssi thresholds. */
1199 for (rate = tx_rate - 1; rate >= 0; rate--) {
1200 if (rate_table->info[rate].phy !=
dc2222a8 1201 rate_table->info[tx_rate].phy)
f078f209
LR		 1202 break;
1203
2c5a744d 1204 if (CHK_RSSI(rate)) {
256b7759 1205 if (ath_rc_priv->state[rate+1].rssi_thres <
2c5a744d 1206 rate_table->info[rate].rssi_ack_deltamin)
256b7759 1207 ath_rc_priv->state[rate].rssi_thres = 0;
f078f209 1208 else {
256b7759 1209 ath_rc_priv->state[rate].rssi_thres =
2c5a744d
S		 1210 ath_rc_priv->state[rate+1].rssi_thres -
1211 rate_table->info[rate].rssi_ack_deltamin;
f078f209
LR		 1212 }
1213
256b7759 1214 if (ath_rc_priv->state[rate].rssi_thres <
2c5a744d 1215 rate_table->info[rate].rssi_ack_validmin) {
256b7759 1216 ath_rc_priv->state[rate].rssi_thres =
2c5a744d 1217 rate_table->info[rate].rssi_ack_validmin;
f078f209
LR		 1218 }
1219 }
1220 }
1221 }
1222
1223 /* Make sure the rates below this have lower PER */
1224 /* Monotonicity is kept only for rates below the current rate. */
256b7759 1225 if (ath_rc_priv->state[tx_rate].per < last_per) {
f078f209
LR		 1226 for (rate = tx_rate - 1; rate >= 0; rate--) {
1227 if (rate_table->info[rate].phy !=
dc2222a8 1228 rate_table->info[tx_rate].phy)
f078f209
LR		 1229 break;
1230
256b7759
S		 1231 if (ath_rc_priv->state[rate].per >
1232 ath_rc_priv->state[rate+1].per) {
1233 ath_rc_priv->state[rate].per =
1234 ath_rc_priv->state[rate+1].per;
f078f209
LR		 1235 }
1236 }
1237 }
1238
1239 /* Maintain monotonicity for rates above the current rate */
2c5a744d
S		 1240 for (rate = tx_rate; rate < size - 1; rate++) {
1241 if (ath_rc_priv->state[rate+1].per <
1242 ath_rc_priv->state[rate].per)
256b7759
S		 1243 ath_rc_priv->state[rate+1].per =
1244 ath_rc_priv->state[rate].per;
f078f209
LR		 1245 }
1246
1247 /* Every so often, we reduce the thresholds and
1248 * PER (different for CCK and OFDM). */
256b7759 1249 if (now_msec - ath_rc_priv->rssi_down_time >=
dc2222a8 1250 rate_table->rssi_reduce_interval) {
f078f209 1251
2c5a744d 1252 for (rate = 0; rate < size; rate++) {
256b7759 1253 if (ath_rc_priv->state[rate].rssi_thres >
dc2222a8 1254 rate_table->info[rate].rssi_ack_validmin)
256b7759 1255 ath_rc_priv->state[rate].rssi_thres -= 1;
f078f209 1256 }
256b7759 1257 ath_rc_priv->rssi_down_time = now_msec;
f078f209
LR		 1258 }
1259
1260 /* Every so often, we reduce the thresholds
1261 * and PER (different for CCK and OFDM). */
256b7759 1262 if (now_msec - ath_rc_priv->per_down_time >=
dc2222a8 1263 rate_table->rssi_reduce_interval) {
2c5a744d 1264 for (rate = 0; rate < size; rate++) {
256b7759
S		 1265 ath_rc_priv->state[rate].per =
1266 7 * ath_rc_priv->state[rate].per / 8;
f078f209
LR		 1267 }
1268
256b7759 1269 ath_rc_priv->per_down_time = now_msec;
f078f209 1270 }
2c5a744d 1271
9e712790
S		 1272 ath_debug_stat_retries(sc, tx_rate, xretries, retries,
1273 ath_rc_priv->state[tx_rate].per);
029bc432 1274
2c5a744d
S		 1275#undef CHK_RSSI
1276}
1277
1278static int ath_rc_get_rateindex(struct ath_rate_table *rate_table,
1279 struct ieee80211_tx_rate *rate)
1280{
1281 int rix;
1282
1283 if ((rate->flags & IEEE80211_TX_RC_40_MHZ_WIDTH) &&
1284 (rate->flags & IEEE80211_TX_RC_SHORT_GI))
1285 rix = rate_table->info[rate->idx].ht_index;
1286 else if (rate->flags & IEEE80211_TX_RC_SHORT_GI)
1287 rix = rate_table->info[rate->idx].sgi_index;
1288 else if (rate->flags & IEEE80211_TX_RC_40_MHZ_WIDTH)
1289 rix = rate_table->info[rate->idx].cw40index;
1290 else
1291 rix = rate_table->info[rate->idx].base_index;
1292
1293 return rix;
f078f209
LR		 1294}
1295
46d14a58
S		 1296static void ath_rc_tx_status(struct ath_softc *sc,
1297 struct ath_rate_priv *ath_rc_priv,
1298 struct ieee80211_tx_info *tx_info,
1299 int final_ts_idx, int xretries, int long_retry)
f078f209 1300{
46d14a58 1301 struct ath_tx_info_priv *tx_info_priv = ATH_TX_INFO_PRIV(tx_info);
f078f209 1302 struct ath_rate_table *rate_table;
a8efee4f 1303 struct ieee80211_tx_rate *rates = tx_info->status.rates;
f078f209 1304 u8 flags;
2c5a744d 1305 u32 i = 0, rix;
f078f209 1306
40990ec0 1307 rate_table = sc->cur_rate_table;
f078f209
LR		 1308
1309 /*
1310 * If the first rate is not the final index, there
1311 * are intermediate rate failures to be processed.
1312 */
1313 if (final_ts_idx != 0) {
1314 /* Process intermediate rates that failed.*/
2c5a744d
S		 1315 for (i = 0; i < final_ts_idx ; i++) {
1316 if (rates[i].count != 0 && (rates[i].idx >= 0)) {
1317 flags = rates[i].flags;
1318
f078f209
LR		 1319 /* If HT40 and we have switched mode from
1320 * 40 to 20 => don't update */
2c5a744d 1321
a8efee4f 1322 if ((flags & IEEE80211_TX_RC_40_MHZ_WIDTH) &&
e63835b0 1323 (ath_rc_priv->rc_phy_mode != WLAN_RC_40_FLAG))
f078f209 1324 return;
e63835b0 1325
2c5a744d 1326 rix = ath_rc_get_rateindex(rate_table, &rates[i]);
f078f209 1327 ath_rc_update_ht(sc, ath_rc_priv,
46d14a58 1328 tx_info_priv, rix,
f078f209 1329 xretries ? 1 : 2,
2c5a744d 1330 rates[i].count);
f078f209
LR		 1331 }
1332 }
1333 } else {
1334 /*
1335 * Handle the special case of MIMO PS burst, where the second
1336 * aggregate is sent out with only one rate and one try.
1337 * Treating it as an excessive retry penalizes the rate
1338 * inordinately.
1339 */
a8efee4f 1340 if (rates[0].count == 1 && xretries == 1)
f078f209
LR		 1341 xretries = 2;
1342 }
1343
2c5a744d
S		 1344 flags = rates[i].flags;
1345
f078f209 1346 /* If HT40 and we have switched mode from 40 to 20 => don't update */
a8efee4f 1347 if ((flags & IEEE80211_TX_RC_40_MHZ_WIDTH) &&
e63835b0 1348 (ath_rc_priv->rc_phy_mode != WLAN_RC_40_FLAG)) {
f078f209 1349 return;
e63835b0 1350 }
f078f209 1351
2c5a744d 1352 rix = ath_rc_get_rateindex(rate_table, &rates[i]);
46d14a58 1353 ath_rc_update_ht(sc, ath_rc_priv, tx_info_priv, rix,
2c5a744d 1354 xretries, long_retry);
f078f209
LR		 1355}
1356
e11602b7
S		 1357static struct ath_rate_table *ath_choose_rate_table(struct ath_softc *sc,
1358 enum ieee80211_band band,
1359 bool is_ht, bool is_cw_40)
1360{
1361 int mode = 0;
1362
1363 switch(band) {
1364 case IEEE80211_BAND_2GHZ:
1365 mode = ATH9K_MODE_11G;
1366 if (is_ht)
1367 mode = ATH9K_MODE_11NG_HT20;
1368 if (is_cw_40)
1369 mode = ATH9K_MODE_11NG_HT40PLUS;
1370 break;
1371 case IEEE80211_BAND_5GHZ:
1372 mode = ATH9K_MODE_11A;
1373 if (is_ht)
1374 mode = ATH9K_MODE_11NA_HT20;
1375 if (is_cw_40)
1376 mode = ATH9K_MODE_11NA_HT40PLUS;
1377 break;
1378 default:
04bd4638 1379 DPRINTF(sc, ATH_DBG_CONFIG, "Invalid band\n");
e11602b7
S		 1380 return NULL;
1381 }
1382
1383 BUG_ON(mode >= ATH9K_MODE_MAX);
1384
04bd4638 1385 DPRINTF(sc, ATH_DBG_CONFIG, "Choosing rate table for mode: %d\n", mode);
e11602b7
S		 1386 return sc->hw_rate_table[mode];
1387}
1388
5ddfac3b 1389static void ath_rc_init(struct ath_softc *sc,
46d14a58 1390 struct ath_rate_priv *ath_rc_priv,
5ddfac3b 1391 struct ieee80211_supported_band *sband,
9331ec80
S		 1392 struct ieee80211_sta *sta,
1393 struct ath_rate_table *rate_table)
f078f209 1394{
5ddfac3b
S		 1395 struct ath_rateset *rateset = &ath_rc_priv->neg_rates;
1396 u8 *ht_mcs = (u8 *)&ath_rc_priv->neg_ht_rates;
f078f209 1397 u8 i, j, k, hi = 0, hthi = 0;
f078f209 1398
e11602b7
S		 1399 if (!rate_table) {
1400 DPRINTF(sc, ATH_DBG_FATAL, "Rate table not initialized\n");
1401 return;
1402 }
5ddfac3b 1403
f078f209
LR		 1404 /* Initial rate table size. Will change depending
1405 * on the working rate set */
46d14a58 1406 ath_rc_priv->rate_table_size = RATE_TABLE_SIZE;
f078f209
LR		 1407
1408 /* Initialize thresholds according to the global rate table */
5ddfac3b 1409 for (i = 0 ; i < ath_rc_priv->rate_table_size; i++) {
256b7759 1410 ath_rc_priv->state[i].rssi_thres =
f078f209 1411 rate_table->info[i].rssi_ack_validmin;
256b7759 1412 ath_rc_priv->state[i].per = 0;
f078f209
LR		 1413 }
1414
1415 /* Determine the valid rates */
256b7759 1416 ath_rc_init_valid_txmask(ath_rc_priv);
f078f209
LR		 1417
1418 for (i = 0; i < WLAN_RC_PHY_MAX; i++) {
1419 for (j = 0; j < MAX_TX_RATE_PHY; j++)
256b7759
S		 1420 ath_rc_priv->valid_phy_rateidx[i][j] = 0;
1421 ath_rc_priv->valid_phy_ratecnt[i] = 0;
f078f209 1422 }
9331ec80 1423 ath_rc_priv->rc_phy_mode = ath_rc_priv->ht_cap & WLAN_RC_40_FLAG;
f078f209
LR		 1424
1425 /* Set stream capability */
5ddfac3b 1426 ath_rc_priv->single_stream = (ath_rc_priv->ht_cap & WLAN_RC_DS_FLAG) ? 0 : 1;
f078f209
LR		 1427
1428 if (!rateset->rs_nrates) {
1429 /* No working rate, just initialize valid rates */
2c5a744d 1430 hi = ath_rc_init_validrates(ath_rc_priv, rate_table,
c89424df 1431 ath_rc_priv->ht_cap);
f078f209
LR		 1432 } else {
1433 /* Use intersection of working rates and valid rates */
2c5a744d 1434 hi = ath_rc_setvalid_rates(ath_rc_priv, rate_table,
c89424df 1435 rateset, ath_rc_priv->ht_cap);
5ddfac3b 1436 if (ath_rc_priv->ht_cap & WLAN_RC_HT_FLAG) {
2c5a744d 1437 hthi = ath_rc_setvalid_htrates(ath_rc_priv,
c89424df
S		 1438 rate_table,
1439 ht_mcs,
1440 ath_rc_priv->ht_cap);
f078f209
LR		 1441 }
1442 hi = A_MAX(hi, hthi);
1443 }
1444
256b7759
S		 1445 ath_rc_priv->rate_table_size = hi + 1;
1446 ath_rc_priv->rate_max_phy = 0;
46d14a58 1447 ASSERT(ath_rc_priv->rate_table_size <= RATE_TABLE_SIZE);
f078f209
LR		 1448
1449 for (i = 0, k = 0; i < WLAN_RC_PHY_MAX; i++) {
256b7759
S		 1450 for (j = 0; j < ath_rc_priv->valid_phy_ratecnt[i]; j++) {
1451 ath_rc_priv->valid_rate_index[k++] =
1452 ath_rc_priv->valid_phy_rateidx[i][j];
f078f209
LR		 1453 }
1454
46d14a58 1455 if (!ath_rc_valid_phyrate(i, rate_table->initial_ratemax, 1)
256b7759 1456 || !ath_rc_priv->valid_phy_ratecnt[i])
f078f209
LR		 1457 continue;
1458
256b7759 1459 ath_rc_priv->rate_max_phy = ath_rc_priv->valid_phy_rateidx[i][j-1];
f078f209 1460 }
46d14a58
S		 1461 ASSERT(ath_rc_priv->rate_table_size <= RATE_TABLE_SIZE);
1462 ASSERT(k <= RATE_TABLE_SIZE);
f078f209 1463
256b7759 1464 ath_rc_priv->max_valid_rate = k;
256b7759
S		 1465 ath_rc_sort_validrates(rate_table, ath_rc_priv);
1466 ath_rc_priv->rate_max_phy = ath_rc_priv->valid_rate_index[k-4];
40990ec0 1467 sc->cur_rate_table = rate_table;
9331ec80
S		 1468
1469 DPRINTF(sc, ATH_DBG_CONFIG, "RC Initialized with capabilities: 0x%x\n",
1470 ath_rc_priv->ht_cap);
f078f209
LR		 1471}
1472
c2da50e5
S		 1473static u8 ath_rc_build_ht_caps(struct ath_softc *sc, struct ieee80211_sta *sta,
1474 bool is_cw40, bool is_sgi40)
9331ec80
S		 1475{
1476 u8 caps = 0;
1477
c2da50e5 1478 if (sta->ht_cap.ht_supported) {
9331ec80
S		 1479 caps = WLAN_RC_HT_FLAG;
1480 if (sc->sc_ah->caps.tx_chainmask != 1 &&
c2da50e5
S		 1481 ath9k_hw_getcapability(sc->sc_ah, ATH9K_CAP_DS, 0, NULL)) {
1482 if (sta->ht_cap.mcs.rx_mask[1])
1483 caps |= WLAN_RC_DS_FLAG;
1484 }
9331ec80
S		 1485 if (is_cw40)
1486 caps |= WLAN_RC_40_FLAG;
1487 if (is_sgi40)
1488 caps |= WLAN_RC_SGI_FLAG;
1489 }
1490
1491 return caps;
1492}
1493
1494/***********************************/
1495/* mac80211 Rate Control callbacks */
1496/***********************************/
1497
4b7679a5
JB		 1498static void ath_tx_status(void *priv, struct ieee80211_supported_band *sband,
1499 struct ieee80211_sta *sta, void *priv_sta,
f078f209
LR		 1500 struct sk_buff *skb)
1501{
1502 struct ath_softc *sc = priv;
46d14a58
S		 1503 struct ath_rate_priv *ath_rc_priv = priv_sta;
1504 struct ath_tx_info_priv *tx_info_priv = NULL;
f078f209
LR		 1505 struct ieee80211_tx_info *tx_info = IEEE80211_SKB_CB(skb);
1506 struct ieee80211_hdr *hdr;
46d14a58 1507 int final_ts_idx, tx_status = 0, is_underrun = 0;
f078f209
LR		 1508 __le16 fc;
1509
f078f209
LR		 1510 hdr = (struct ieee80211_hdr *)skb->data;
1511 fc = hdr->frame_control;
46d14a58 1512 tx_info_priv = ATH_TX_INFO_PRIV(tx_info);
46d14a58 1513 final_ts_idx = tx_info_priv->tx.ts_rateindex;
f078f209 1514
ff37e337 1515 if (!priv_sta || !ieee80211_is_data(fc) ||
7ac47010 1516 !tx_info_priv->update_rc)
46d14a58 1517 goto exit;
e6a9854b 1518
46d14a58
S		 1519 if (tx_info_priv->tx.ts_status & ATH9K_TXERR_FILT)
1520 goto exit;
e6a9854b 1521
46d14a58
S		 1522 /*
1523 * If underrun error is seen assume it as an excessive retry only
1524 * if prefetch trigger level have reached the max (0x3f for 5416)
1525 * Adjust the long retry as if the frame was tried ATH_11N_TXMAXTRY
1526 * times. This affects how ratectrl updates PER for the failed rate.
1527 */
1528 if (tx_info_priv->tx.ts_flags &
1529 (ATH9K_TX_DATA_UNDERRUN | ATH9K_TX_DELIM_UNDERRUN) &&
2660b81a 1530 ((sc->sc_ah->tx_trig_level) >= ath_rc_priv->tx_triglevel_max)) {
46d14a58
S		 1531 tx_status = 1;
1532 is_underrun = 1;
1533 }
1534
1535 if ((tx_info_priv->tx.ts_status & ATH9K_TXERR_XRETRY) ||
1536 (tx_info_priv->tx.ts_status & ATH9K_TXERR_FIFO))
1537 tx_status = 1;
1538
1539 ath_rc_tx_status(sc, ath_rc_priv, tx_info, final_ts_idx, tx_status,
1540 (is_underrun) ? ATH_11N_TXMAXTRY :
1541 tx_info_priv->tx.ts_longretry);
1542
d22b0022 1543 /* Check if aggregation has to be enabled for this tid */
d5c232ff
VT		 1544 if (conf_is_ht(&sc->hw->conf) &&
1545 !(skb->protocol == cpu_to_be16(ETH_P_PAE))) {
d22b0022
S		 1546 if (ieee80211_is_data_qos(fc)) {
1547 u8 *qc, tid;
1548 struct ath_node *an;
1549
1550 qc = ieee80211_get_qos_ctl(hdr);
1551 tid = qc[0] & 0xf;
1552 an = (struct ath_node *)sta->drv_priv;
1553
1554 if(ath_tx_aggr_check(sc, an, tid))
1555 ieee80211_start_tx_ba_session(sc->hw, hdr->addr1, tid);
1556 }
1557 }
7a7dec65
S		 1558
1559 ath_debug_stat_rc(sc, skb);
46d14a58 1560exit:
e6a9854b 1561 kfree(tx_info_priv);
f078f209
LR		 1562}
1563
e6a9854b
JB		 1564static void ath_get_rate(void *priv, struct ieee80211_sta *sta, void *priv_sta,
1565 struct ieee80211_tx_rate_control *txrc)
f078f209 1566{
e6a9854b
JB		 1567 struct ieee80211_supported_band *sband = txrc->sband;
1568 struct sk_buff *skb = txrc->skb;
f078f209 1569 struct ieee80211_hdr *hdr = (struct ieee80211_hdr *)skb->data;
3900898c 1570 struct ieee80211_tx_info *tx_info = IEEE80211_SKB_CB(skb);
4b7679a5 1571 struct ath_softc *sc = priv;
46d14a58 1572 struct ath_rate_priv *ath_rc_priv = priv_sta;
f078f209 1573 __le16 fc = hdr->frame_control;
f078f209 1574
f078f209 1575 /* lowest rate for management and multicast/broadcast frames */
f66000f7
JM		 1576 if (!ieee80211_is_data(fc) || is_multicast_ether_addr(hdr->addr1) ||
1577 !sta) {
a8efee4f
S		 1578 tx_info->control.rates[0].idx = rate_lowest_index(sband, sta);
1579 tx_info->control.rates[0].count =
1580 is_multicast_ether_addr(hdr->addr1) ? 1 : ATH_MGT_TXMAXTRY;
f078f209
LR		 1581 return;
1582 }
1583
f078f209 1584 /* Find tx rate for unicast frames */
3900898c 1585 ath_rc_ratefind(sc, ath_rc_priv, txrc);
f078f209
LR		 1586}
1587
4b7679a5
JB		 1588static void ath_rate_init(void *priv, struct ieee80211_supported_band *sband,
1589 struct ieee80211_sta *sta, void *priv_sta)
f078f209 1590{
4b7679a5 1591 struct ath_softc *sc = priv;
46d14a58 1592 struct ath_rate_priv *ath_rc_priv = priv_sta;
9331ec80
S		 1593 struct ath_rate_table *rate_table = NULL;
1594 bool is_cw40, is_sgi40;
f078f209
LR		 1595 int i, j = 0;
1596
7b4d2735
S		 1597 for (i = 0; i < sband->n_bitrates; i++) {
1598 if (sta->supp_rates[sband->band] & BIT(i)) {
1599 ath_rc_priv->neg_rates.rs_rates[j]
1600 = (sband->bitrates[i].bitrate * 2) / 10;
1601 j++;
1602 }
1603 }
1604 ath_rc_priv->neg_rates.rs_nrates = j;
f078f209 1605
a4510bf8 1606 if (sta->ht_cap.ht_supported) {
7b4d2735 1607 for (i = 0, j = 0; i < 77; i++) {
ae5eb026 1608 if (sta->ht_cap.mcs.rx_mask[i/8] & (1<<(i%8)))
dc2222a8 1609 ath_rc_priv->neg_ht_rates.rs_rates[j++] = i;
f078f209
LR		 1610 if (j == ATH_RATE_MAX)
1611 break;
1612 }
dc2222a8 1613 ath_rc_priv->neg_ht_rates.rs_nrates = j;
f078f209 1614 }
7b4d2735 1615
9331ec80
S		 1616 is_cw40 = sta->ht_cap.cap & IEEE80211_HT_CAP_SUP_WIDTH_20_40;
1617 is_sgi40 = sta->ht_cap.cap & IEEE80211_HT_CAP_SGI_40;
1618
1619 /* Choose rate table first */
1620
1621 if ((sc->sc_ah->opmode == NL80211_IFTYPE_STATION) ||
9cb5412b 1622 (sc->sc_ah->opmode == NL80211_IFTYPE_MESH_POINT) ||
9331ec80
S		 1623 (sc->sc_ah->opmode == NL80211_IFTYPE_ADHOC)) {
1624 rate_table = ath_choose_rate_table(sc, sband->band,
1625 sta->ht_cap.ht_supported,
1626 is_cw40);
1627 } else if (sc->sc_ah->opmode == NL80211_IFTYPE_AP) {
1628 /* cur_rate_table would be set on init through config() */
1629 rate_table = sc->cur_rate_table;
1630 }
1631
c2da50e5 1632 ath_rc_priv->ht_cap = ath_rc_build_ht_caps(sc, sta, is_cw40, is_sgi40);
9331ec80
S		 1633 ath_rc_init(sc, priv_sta, sband, sta, rate_table);
1634}
1635
1636static void ath_rate_update(void *priv, struct ieee80211_supported_band *sband,
1637 struct ieee80211_sta *sta, void *priv_sta,
1638 u32 changed)
1639{
1640 struct ath_softc *sc = priv;
1641 struct ath_rate_priv *ath_rc_priv = priv_sta;
1642 struct ath_rate_table *rate_table = NULL;
1643 bool oper_cw40 = false, oper_sgi40;
1644 bool local_cw40 = (ath_rc_priv->ht_cap & WLAN_RC_40_FLAG) ?
1645 true : false;
1646 bool local_sgi40 = (ath_rc_priv->ht_cap & WLAN_RC_SGI_FLAG) ?
1647 true : false;
1648
1649 /* FIXME: Handle AP mode later when we support CWM */
1650
1651 if (changed & IEEE80211_RC_HT_CHANGED) {
1652 if (sc->sc_ah->opmode != NL80211_IFTYPE_STATION)
1653 return;
1654
1655 if (sc->hw->conf.channel_type == NL80211_CHAN_HT40MINUS ||
1656 sc->hw->conf.channel_type == NL80211_CHAN_HT40PLUS)
1657 oper_cw40 = true;
1658
1659 oper_sgi40 = (sta->ht_cap.cap & IEEE80211_HT_CAP_SGI_40) ?
1660 true : false;
1661
1662 if ((local_cw40 != oper_cw40) || (local_sgi40 != oper_sgi40)) {
1663 rate_table = ath_choose_rate_table(sc, sband->band,
1664 sta->ht_cap.ht_supported,
1665 oper_cw40);
c2da50e5 1666 ath_rc_priv->ht_cap = ath_rc_build_ht_caps(sc, sta,
9331ec80
S		 1667 oper_cw40, oper_sgi40);
1668 ath_rc_init(sc, priv_sta, sband, sta, rate_table);
1669
1670 DPRINTF(sc, ATH_DBG_CONFIG,
1671 "Operating HT Bandwidth changed to: %d\n",
1672 sc->hw->conf.channel_type);
1673 }
1674 }
f078f209
LR		 1675}
1676
4b7679a5 1677static void *ath_rate_alloc(struct ieee80211_hw *hw, struct dentry *debugfsdir)
f078f209 1678{
bce048d7
JM		 1679 struct ath_wiphy *aphy = hw->priv;
1680 return aphy->sc;
f078f209
LR		 1681}
1682
1683static void ath_rate_free(void *priv)
1684{
1685 return;
1686}
1687
4b7679a5 1688static void *ath_rate_alloc_sta(void *priv, struct ieee80211_sta *sta, gfp_t gfp)
f078f209
LR		 1689{
1690 struct ath_softc *sc = priv;
46d14a58 1691 struct ath_rate_priv *rate_priv;
f078f209 1692
46d14a58 1693 rate_priv = kzalloc(sizeof(struct ath_rate_priv), gfp);
f078f209 1694 if (!rate_priv) {
dc2222a8 1695 DPRINTF(sc, ATH_DBG_FATAL,
04bd4638 1696 "Unable to allocate private rc structure\n");
f078f209
LR		 1697 return NULL;
1698 }
fe60594a 1699
fe60594a 1700 rate_priv->rssi_down_time = jiffies_to_msecs(jiffies);
2660b81a 1701 rate_priv->tx_triglevel_max = sc->sc_ah->caps.tx_triglevel_max;
dc2222a8 1702
f078f209
LR		 1703 return rate_priv;
1704}
1705
4b7679a5
JB		 1706static void ath_rate_free_sta(void *priv, struct ieee80211_sta *sta,
1707 void *priv_sta)
f078f209 1708{
46d14a58 1709 struct ath_rate_priv *rate_priv = priv_sta;
fe60594a 1710 kfree(rate_priv);
f078f209
LR		 1711}
1712
1713static struct rate_control_ops ath_rate_ops = {
1714 .module = NULL,
1715 .name = "ath9k_rate_control",
1716 .tx_status = ath_tx_status,
1717 .get_rate = ath_get_rate,
1718 .rate_init = ath_rate_init,
9331ec80 1719 .rate_update = ath_rate_update,
f078f209
LR		 1720 .alloc = ath_rate_alloc,
1721 .free = ath_rate_free,
1722 .alloc_sta = ath_rate_alloc_sta,
4b7679a5 1723 .free_sta = ath_rate_free_sta,
f078f209
LR		 1724};
1725
fe7f4a77
S		 1726void ath_rate_attach(struct ath_softc *sc)
1727{
1728 sc->hw_rate_table[ATH9K_MODE_11B] =
1729 &ar5416_11b_ratetable;
1730 sc->hw_rate_table[ATH9K_MODE_11A] =
1731 &ar5416_11a_ratetable;
1732 sc->hw_rate_table[ATH9K_MODE_11G] =
1733 &ar5416_11g_ratetable;
1734 sc->hw_rate_table[ATH9K_MODE_11NA_HT20] =
1735 &ar5416_11na_ratetable;
1736 sc->hw_rate_table[ATH9K_MODE_11NG_HT20] =
1737 &ar5416_11ng_ratetable;
1738 sc->hw_rate_table[ATH9K_MODE_11NA_HT40PLUS] =
1739 &ar5416_11na_ratetable;
1740 sc->hw_rate_table[ATH9K_MODE_11NA_HT40MINUS] =
1741 &ar5416_11na_ratetable;
1742 sc->hw_rate_table[ATH9K_MODE_11NG_HT40PLUS] =
1743 &ar5416_11ng_ratetable;
1744 sc->hw_rate_table[ATH9K_MODE_11NG_HT40MINUS] =
1745 &ar5416_11ng_ratetable;
1746}
1747
f078f209
LR		 1748int ath_rate_control_register(void)
1749{
1750 return ieee80211_rate_control_register(&ath_rate_ops);
1751}
1752
1753void ath_rate_control_unregister(void)
1754{
1755 ieee80211_rate_control_unregister(&ath_rate_ops);
1756}
Linux kernel - Deliverables
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