2
* Copyright (c) 2004 Video54 Technologies, Inc.
3
* Copyright (c) 2004-2011 Atheros Communications, Inc.
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.
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.
18
#include <linux/slab.h>
19
#include <linux/export.h>
23
static const struct ath_rate_table ar5416_11na_ratetable = {
27
[0] = { RC_L_SDT, WLAN_RC_PHY_OFDM, 6000,
28
5400, 0, 12, 0, 0, 0, 0 }, /* 6 Mb */
29
[1] = { RC_L_SDT, WLAN_RC_PHY_OFDM, 9000,
30
7800, 1, 18, 0, 1, 1, 1 }, /* 9 Mb */
31
[2] = { RC_L_SDT, WLAN_RC_PHY_OFDM, 12000,
32
10000, 2, 24, 2, 2, 2, 2 }, /* 12 Mb */
33
[3] = { RC_L_SDT, WLAN_RC_PHY_OFDM, 18000,
34
13900, 3, 36, 2, 3, 3, 3 }, /* 18 Mb */
35
[4] = { RC_L_SDT, WLAN_RC_PHY_OFDM, 24000,
36
17300, 4, 48, 4, 4, 4, 4 }, /* 24 Mb */
37
[5] = { RC_L_SDT, WLAN_RC_PHY_OFDM, 36000,
38
23000, 5, 72, 4, 5, 5, 5 }, /* 36 Mb */
39
[6] = { RC_L_SDT, WLAN_RC_PHY_OFDM, 48000,
40
27400, 6, 96, 4, 6, 6, 6 }, /* 48 Mb */
41
[7] = { RC_L_SDT, WLAN_RC_PHY_OFDM, 54000,
42
29300, 7, 108, 4, 7, 7, 7 }, /* 54 Mb */
43
[8] = { RC_HT_SDT_2040, WLAN_RC_PHY_HT_20_SS, 6500,
44
6400, 0, 0, 0, 38, 8, 38 }, /* 6.5 Mb */
45
[9] = { RC_HT_SDT_20, WLAN_RC_PHY_HT_20_SS, 13000,
46
12700, 1, 1, 2, 39, 9, 39 }, /* 13 Mb */
47
[10] = { RC_HT_SDT_20, WLAN_RC_PHY_HT_20_SS, 19500,
48
18800, 2, 2, 2, 40, 10, 40 }, /* 19.5 Mb */
49
[11] = { RC_HT_SD_20, WLAN_RC_PHY_HT_20_SS, 26000,
50
25000, 3, 3, 4, 41, 11, 41 }, /* 26 Mb */
51
[12] = { RC_HT_SD_20, WLAN_RC_PHY_HT_20_SS, 39000,
52
36700, 4, 4, 4, 42, 12, 42 }, /* 39 Mb */
53
[13] = { RC_HT_S_20, WLAN_RC_PHY_HT_20_SS, 52000,
54
48100, 5, 5, 4, 43, 13, 43 }, /* 52 Mb */
55
[14] = { RC_HT_S_20, WLAN_RC_PHY_HT_20_SS, 58500,
56
53500, 6, 6, 4, 44, 14, 44 }, /* 58.5 Mb */
57
[15] = { RC_HT_S_20, WLAN_RC_PHY_HT_20_SS, 65000,
58
59000, 7, 7, 4, 45, 16, 46 }, /* 65 Mb */
59
[16] = { RC_HT_S_20, WLAN_RC_PHY_HT_20_SS_HGI, 72200,
60
65400, 7, 7, 4, 45, 16, 46 }, /* 75 Mb */
61
[17] = { RC_INVALID, WLAN_RC_PHY_HT_20_DS, 13000,
62
12700, 8, 8, 0, 47, 17, 47 }, /* 13 Mb */
63
[18] = { RC_HT_T_20, WLAN_RC_PHY_HT_20_DS, 26000,
64
24800, 9, 9, 2, 48, 18, 48 }, /* 26 Mb */
65
[19] = { RC_HT_T_20, WLAN_RC_PHY_HT_20_DS, 39000,
66
36600, 10, 10, 2, 49, 19, 49 }, /* 39 Mb */
67
[20] = { RC_HT_DT_20, WLAN_RC_PHY_HT_20_DS, 52000,
68
48100, 11, 11, 4, 50, 20, 50 }, /* 52 Mb */
69
[21] = { RC_HT_DT_20, WLAN_RC_PHY_HT_20_DS, 78000,
70
69500, 12, 12, 4, 51, 21, 51 }, /* 78 Mb */
71
[22] = { RC_HT_DT_20, WLAN_RC_PHY_HT_20_DS, 104000,
72
89500, 13, 13, 4, 52, 22, 52 }, /* 104 Mb */
73
[23] = { RC_HT_DT_20, WLAN_RC_PHY_HT_20_DS, 117000,
74
98900, 14, 14, 4, 53, 23, 53 }, /* 117 Mb */
75
[24] = { RC_HT_DT_20, WLAN_RC_PHY_HT_20_DS, 130000,
76
108300, 15, 15, 4, 54, 25, 55 }, /* 130 Mb */
77
[25] = { RC_HT_DT_20, WLAN_RC_PHY_HT_20_DS_HGI, 144400,
78
120000, 15, 15, 4, 54, 25, 55 }, /* 144.4 Mb */
79
[26] = { RC_INVALID, WLAN_RC_PHY_HT_20_TS, 19500,
80
17400, 16, 16, 0, 56, 26, 56 }, /* 19.5 Mb */
81
[27] = { RC_INVALID, WLAN_RC_PHY_HT_20_TS, 39000,
82
35100, 17, 17, 2, 57, 27, 57 }, /* 39 Mb */
83
[28] = { RC_INVALID, WLAN_RC_PHY_HT_20_TS, 58500,
84
52600, 18, 18, 2, 58, 28, 58 }, /* 58.5 Mb */
85
[29] = { RC_INVALID, WLAN_RC_PHY_HT_20_TS, 78000,
86
70400, 19, 19, 4, 59, 29, 59 }, /* 78 Mb */
87
[30] = { RC_INVALID, WLAN_RC_PHY_HT_20_TS, 117000,
88
104900, 20, 20, 4, 60, 31, 61 }, /* 117 Mb */
89
[31] = { RC_INVALID, WLAN_RC_PHY_HT_20_TS_HGI, 130000,
90
115800, 20, 20, 4, 60, 31, 61 }, /* 130 Mb*/
91
[32] = { RC_HT_T_20, WLAN_RC_PHY_HT_20_TS, 156000,
92
137200, 21, 21, 4, 62, 33, 63 }, /* 156 Mb */
93
[33] = { RC_HT_T_20, WLAN_RC_PHY_HT_20_TS_HGI, 173300,
94
151100, 21, 21, 4, 62, 33, 63 }, /* 173.3 Mb */
95
[34] = { RC_HT_T_20, WLAN_RC_PHY_HT_20_TS, 175500,
96
152800, 22, 22, 4, 64, 35, 65 }, /* 175.5 Mb */
97
[35] = { RC_HT_T_20, WLAN_RC_PHY_HT_20_TS_HGI, 195000,
98
168400, 22, 22, 4, 64, 35, 65 }, /* 195 Mb*/
99
[36] = { RC_HT_T_20, WLAN_RC_PHY_HT_20_TS, 195000,
100
168400, 23, 23, 4, 66, 37, 67 }, /* 195 Mb */
101
[37] = { RC_HT_T_20, WLAN_RC_PHY_HT_20_TS_HGI, 216700,
102
185000, 23, 23, 4, 66, 37, 67 }, /* 216.7 Mb */
103
[38] = { RC_HT_SDT_40, WLAN_RC_PHY_HT_40_SS, 13500,
104
13200, 0, 0, 0, 38, 38, 38 }, /* 13.5 Mb*/
105
[39] = { RC_HT_SDT_40, WLAN_RC_PHY_HT_40_SS, 27500,
106
25900, 1, 1, 2, 39, 39, 39 }, /* 27.0 Mb*/
107
[40] = { RC_HT_SDT_40, WLAN_RC_PHY_HT_40_SS, 40500,
108
38600, 2, 2, 2, 40, 40, 40 }, /* 40.5 Mb*/
109
[41] = { RC_HT_SD_40, WLAN_RC_PHY_HT_40_SS, 54000,
110
49800, 3, 3, 4, 41, 41, 41 }, /* 54 Mb */
111
[42] = { RC_HT_SD_40, WLAN_RC_PHY_HT_40_SS, 81500,
112
72200, 4, 4, 4, 42, 42, 42 }, /* 81 Mb */
113
[43] = { RC_HT_S_40, WLAN_RC_PHY_HT_40_SS, 108000,
114
92900, 5, 5, 4, 43, 43, 43 }, /* 108 Mb */
115
[44] = { RC_HT_S_40, WLAN_RC_PHY_HT_40_SS, 121500,
116
102700, 6, 6, 4, 44, 44, 44 }, /* 121.5 Mb*/
117
[45] = { RC_HT_S_40, WLAN_RC_PHY_HT_40_SS, 135000,
118
112000, 7, 7, 4, 45, 46, 46 }, /* 135 Mb */
119
[46] = { RC_HT_S_40, WLAN_RC_PHY_HT_40_SS_HGI, 150000,
120
122000, 7, 7, 4, 45, 46, 46 }, /* 150 Mb */
121
[47] = { RC_INVALID, WLAN_RC_PHY_HT_40_DS, 27000,
122
25800, 8, 8, 0, 47, 47, 47 }, /* 27 Mb */
123
[48] = { RC_HT_T_40, WLAN_RC_PHY_HT_40_DS, 54000,
124
49800, 9, 9, 2, 48, 48, 48 }, /* 54 Mb */
125
[49] = { RC_HT_T_40, WLAN_RC_PHY_HT_40_DS, 81000,
126
71900, 10, 10, 2, 49, 49, 49 }, /* 81 Mb */
127
[50] = { RC_HT_DT_40, WLAN_RC_PHY_HT_40_DS, 108000,
128
92500, 11, 11, 4, 50, 50, 50 }, /* 108 Mb */
129
[51] = { RC_HT_DT_40, WLAN_RC_PHY_HT_40_DS, 162000,
130
130300, 12, 12, 4, 51, 51, 51 }, /* 162 Mb */
131
[52] = { RC_HT_DT_40, WLAN_RC_PHY_HT_40_DS, 216000,
132
162800, 13, 13, 4, 52, 52, 52 }, /* 216 Mb */
133
[53] = { RC_HT_DT_40, WLAN_RC_PHY_HT_40_DS, 243000,
134
178200, 14, 14, 4, 53, 53, 53 }, /* 243 Mb */
135
[54] = { RC_HT_DT_40, WLAN_RC_PHY_HT_40_DS, 270000,
136
192100, 15, 15, 4, 54, 55, 55 }, /* 270 Mb */
137
[55] = { RC_HT_DT_40, WLAN_RC_PHY_HT_40_DS_HGI, 300000,
138
207000, 15, 15, 4, 54, 55, 55 }, /* 300 Mb */
139
[56] = { RC_INVALID, WLAN_RC_PHY_HT_40_TS, 40500,
140
36100, 16, 16, 0, 56, 56, 56 }, /* 40.5 Mb */
141
[57] = { RC_INVALID, WLAN_RC_PHY_HT_40_TS, 81000,
142
72900, 17, 17, 2, 57, 57, 57 }, /* 81 Mb */
143
[58] = { RC_INVALID, WLAN_RC_PHY_HT_40_TS, 121500,
144
108300, 18, 18, 2, 58, 58, 58 }, /* 121.5 Mb */
145
[59] = { RC_INVALID, WLAN_RC_PHY_HT_40_TS, 162000,
146
142000, 19, 19, 4, 59, 59, 59 }, /* 162 Mb */
147
[60] = { RC_INVALID, WLAN_RC_PHY_HT_40_TS, 243000,
148
205100, 20, 20, 4, 60, 61, 61 }, /* 243 Mb */
149
[61] = { RC_INVALID, WLAN_RC_PHY_HT_40_TS_HGI, 270000,
150
224700, 20, 20, 4, 60, 61, 61 }, /* 270 Mb */
151
[62] = { RC_HT_T_40, WLAN_RC_PHY_HT_40_TS, 324000,
152
263100, 21, 21, 4, 62, 63, 63 }, /* 324 Mb */
153
[63] = { RC_HT_T_40, WLAN_RC_PHY_HT_40_TS_HGI, 360000,
154
288000, 21, 21, 4, 62, 63, 63 }, /* 360 Mb */
155
[64] = { RC_HT_T_40, WLAN_RC_PHY_HT_40_TS, 364500,
156
290700, 22, 22, 4, 64, 65, 65 }, /* 364.5 Mb */
157
[65] = { RC_HT_T_40, WLAN_RC_PHY_HT_40_TS_HGI, 405000,
158
317200, 22, 22, 4, 64, 65, 65 }, /* 405 Mb */
159
[66] = { RC_HT_T_40, WLAN_RC_PHY_HT_40_TS, 405000,
160
317200, 23, 23, 4, 66, 67, 67 }, /* 405 Mb */
161
[67] = { RC_HT_T_40, WLAN_RC_PHY_HT_40_TS_HGI, 450000,
162
346400, 23, 23, 4, 66, 67, 67 }, /* 450 Mb */
164
50, /* probe interval */
165
WLAN_RC_HT_FLAG, /* Phy rates allowed initially */
168
/* 4ms frame limit not used for NG mode. The values filled
169
* for HT are the 64K max aggregate limit */
171
static const struct ath_rate_table ar5416_11ng_ratetable = {
175
[0] = { RC_ALL, WLAN_RC_PHY_CCK, 1000,
176
900, 0, 2, 0, 0, 0, 0 }, /* 1 Mb */
177
[1] = { RC_ALL, WLAN_RC_PHY_CCK, 2000,
178
1900, 1, 4, 1, 1, 1, 1 }, /* 2 Mb */
179
[2] = { RC_ALL, WLAN_RC_PHY_CCK, 5500,
180
4900, 2, 11, 2, 2, 2, 2 }, /* 5.5 Mb */
181
[3] = { RC_ALL, WLAN_RC_PHY_CCK, 11000,
182
8100, 3, 22, 3, 3, 3, 3 }, /* 11 Mb */
183
[4] = { RC_INVALID, WLAN_RC_PHY_OFDM, 6000,
184
5400, 4, 12, 4, 4, 4, 4 }, /* 6 Mb */
185
[5] = { RC_INVALID, WLAN_RC_PHY_OFDM, 9000,
186
7800, 5, 18, 4, 5, 5, 5 }, /* 9 Mb */
187
[6] = { RC_L_SDT, WLAN_RC_PHY_OFDM, 12000,
188
10100, 6, 24, 6, 6, 6, 6 }, /* 12 Mb */
189
[7] = { RC_L_SDT, WLAN_RC_PHY_OFDM, 18000,
190
14100, 7, 36, 6, 7, 7, 7 }, /* 18 Mb */
191
[8] = { RC_L_SDT, WLAN_RC_PHY_OFDM, 24000,
192
17700, 8, 48, 8, 8, 8, 8 }, /* 24 Mb */
193
[9] = { RC_L_SDT, WLAN_RC_PHY_OFDM, 36000,
194
23700, 9, 72, 8, 9, 9, 9 }, /* 36 Mb */
195
[10] = { RC_L_SDT, WLAN_RC_PHY_OFDM, 48000,
196
27400, 10, 96, 8, 10, 10, 10 }, /* 48 Mb */
197
[11] = { RC_L_SDT, WLAN_RC_PHY_OFDM, 54000,
198
30900, 11, 108, 8, 11, 11, 11 }, /* 54 Mb */
199
[12] = { RC_INVALID, WLAN_RC_PHY_HT_20_SS, 6500,
200
6400, 0, 0, 4, 42, 12, 42 }, /* 6.5 Mb */
201
[13] = { RC_HT_SDT_20, WLAN_RC_PHY_HT_20_SS, 13000,
202
12700, 1, 1, 6, 43, 13, 43 }, /* 13 Mb */
203
[14] = { RC_HT_SDT_20, WLAN_RC_PHY_HT_20_SS, 19500,
204
18800, 2, 2, 6, 44, 14, 44 }, /* 19.5 Mb*/
205
[15] = { RC_HT_SD_20, WLAN_RC_PHY_HT_20_SS, 26000,
206
25000, 3, 3, 8, 45, 15, 45 }, /* 26 Mb */
207
[16] = { RC_HT_SD_20, WLAN_RC_PHY_HT_20_SS, 39000,
208
36700, 4, 4, 8, 46, 16, 46 }, /* 39 Mb */
209
[17] = { RC_HT_S_20, WLAN_RC_PHY_HT_20_SS, 52000,
210
48100, 5, 5, 8, 47, 17, 47 }, /* 52 Mb */
211
[18] = { RC_HT_S_20, WLAN_RC_PHY_HT_20_SS, 58500,
212
53500, 6, 6, 8, 48, 18, 48 }, /* 58.5 Mb */
213
[19] = { RC_HT_S_20, WLAN_RC_PHY_HT_20_SS, 65000,
214
59000, 7, 7, 8, 49, 20, 50 }, /* 65 Mb */
215
[20] = { RC_HT_S_20, WLAN_RC_PHY_HT_20_SS_HGI, 72200,
216
65400, 7, 7, 8, 49, 20, 50 }, /* 65 Mb*/
217
[21] = { RC_INVALID, WLAN_RC_PHY_HT_20_DS, 13000,
218
12700, 8, 8, 4, 51, 21, 51 }, /* 13 Mb */
219
[22] = { RC_HT_T_20, WLAN_RC_PHY_HT_20_DS, 26000,
220
24800, 9, 9, 6, 52, 22, 52 }, /* 26 Mb */
221
[23] = { RC_HT_T_20, WLAN_RC_PHY_HT_20_DS, 39000,
222
36600, 10, 10, 6, 53, 23, 53 }, /* 39 Mb */
223
[24] = { RC_HT_DT_20, WLAN_RC_PHY_HT_20_DS, 52000,
224
48100, 11, 11, 8, 54, 24, 54 }, /* 52 Mb */
225
[25] = { RC_HT_DT_20, WLAN_RC_PHY_HT_20_DS, 78000,
226
69500, 12, 12, 8, 55, 25, 55 }, /* 78 Mb */
227
[26] = { RC_HT_DT_20, WLAN_RC_PHY_HT_20_DS, 104000,
228
89500, 13, 13, 8, 56, 26, 56 }, /* 104 Mb */
229
[27] = { RC_HT_DT_20, WLAN_RC_PHY_HT_20_DS, 117000,
230
98900, 14, 14, 8, 57, 27, 57 }, /* 117 Mb */
231
[28] = { RC_HT_DT_20, WLAN_RC_PHY_HT_20_DS, 130000,
232
108300, 15, 15, 8, 58, 29, 59 }, /* 130 Mb */
233
[29] = { RC_HT_DT_20, WLAN_RC_PHY_HT_20_DS_HGI, 144400,
234
120000, 15, 15, 8, 58, 29, 59 }, /* 144.4 Mb */
235
[30] = { RC_INVALID, WLAN_RC_PHY_HT_20_TS, 19500,
236
17400, 16, 16, 4, 60, 30, 60 }, /* 19.5 Mb */
237
[31] = { RC_INVALID, WLAN_RC_PHY_HT_20_TS, 39000,
238
35100, 17, 17, 6, 61, 31, 61 }, /* 39 Mb */
239
[32] = { RC_INVALID, WLAN_RC_PHY_HT_20_TS, 58500,
240
52600, 18, 18, 6, 62, 32, 62 }, /* 58.5 Mb */
241
[33] = { RC_INVALID, WLAN_RC_PHY_HT_20_TS, 78000,
242
70400, 19, 19, 8, 63, 33, 63 }, /* 78 Mb */
243
[34] = { RC_INVALID, WLAN_RC_PHY_HT_20_TS, 117000,
244
104900, 20, 20, 8, 64, 35, 65 }, /* 117 Mb */
245
[35] = { RC_INVALID, WLAN_RC_PHY_HT_20_TS_HGI, 130000,
246
115800, 20, 20, 8, 64, 35, 65 }, /* 130 Mb */
247
[36] = { RC_HT_T_20, WLAN_RC_PHY_HT_20_TS, 156000,
248
137200, 21, 21, 8, 66, 37, 67 }, /* 156 Mb */
249
[37] = { RC_HT_T_20, WLAN_RC_PHY_HT_20_TS_HGI, 173300,
250
151100, 21, 21, 8, 66, 37, 67 }, /* 173.3 Mb */
251
[38] = { RC_HT_T_20, WLAN_RC_PHY_HT_20_TS, 175500,
252
152800, 22, 22, 8, 68, 39, 69 }, /* 175.5 Mb */
253
[39] = { RC_HT_T_20, WLAN_RC_PHY_HT_20_TS_HGI, 195000,
254
168400, 22, 22, 8, 68, 39, 69 }, /* 195 Mb */
255
[40] = { RC_HT_T_20, WLAN_RC_PHY_HT_20_TS, 195000,
256
168400, 23, 23, 8, 70, 41, 71 }, /* 195 Mb */
257
[41] = { RC_HT_T_20, WLAN_RC_PHY_HT_20_TS_HGI, 216700,
258
185000, 23, 23, 8, 70, 41, 71 }, /* 216.7 Mb */
259
[42] = { RC_HT_SDT_40, WLAN_RC_PHY_HT_40_SS, 13500,
260
13200, 0, 0, 8, 42, 42, 42 }, /* 13.5 Mb */
261
[43] = { RC_HT_SDT_40, WLAN_RC_PHY_HT_40_SS, 27500,
262
25900, 1, 1, 8, 43, 43, 43 }, /* 27.0 Mb */
263
[44] = { RC_HT_SDT_40, WLAN_RC_PHY_HT_40_SS, 40500,
264
38600, 2, 2, 8, 44, 44, 44 }, /* 40.5 Mb */
265
[45] = { RC_HT_SD_40, WLAN_RC_PHY_HT_40_SS, 54000,
266
49800, 3, 3, 8, 45, 45, 45 }, /* 54 Mb */
267
[46] = { RC_HT_SD_40, WLAN_RC_PHY_HT_40_SS, 81500,
268
72200, 4, 4, 8, 46, 46, 46 }, /* 81 Mb */
269
[47] = { RC_HT_S_40 , WLAN_RC_PHY_HT_40_SS, 108000,
270
92900, 5, 5, 8, 47, 47, 47 }, /* 108 Mb */
271
[48] = { RC_HT_S_40, WLAN_RC_PHY_HT_40_SS, 121500,
272
102700, 6, 6, 8, 48, 48, 48 }, /* 121.5 Mb */
273
[49] = { RC_HT_S_40, WLAN_RC_PHY_HT_40_SS, 135000,
274
112000, 7, 7, 8, 49, 50, 50 }, /* 135 Mb */
275
[50] = { RC_HT_S_40, WLAN_RC_PHY_HT_40_SS_HGI, 150000,
276
122000, 7, 7, 8, 49, 50, 50 }, /* 150 Mb */
277
[51] = { RC_INVALID, WLAN_RC_PHY_HT_40_DS, 27000,
278
25800, 8, 8, 8, 51, 51, 51 }, /* 27 Mb */
279
[52] = { RC_HT_T_40, WLAN_RC_PHY_HT_40_DS, 54000,
280
49800, 9, 9, 8, 52, 52, 52 }, /* 54 Mb */
281
[53] = { RC_HT_T_40, WLAN_RC_PHY_HT_40_DS, 81000,
282
71900, 10, 10, 8, 53, 53, 53 }, /* 81 Mb */
283
[54] = { RC_HT_DT_40, WLAN_RC_PHY_HT_40_DS, 108000,
284
92500, 11, 11, 8, 54, 54, 54 }, /* 108 Mb */
285
[55] = { RC_HT_DT_40, WLAN_RC_PHY_HT_40_DS, 162000,
286
130300, 12, 12, 8, 55, 55, 55 }, /* 162 Mb */
287
[56] = { RC_HT_DT_40, WLAN_RC_PHY_HT_40_DS, 216000,
288
162800, 13, 13, 8, 56, 56, 56 }, /* 216 Mb */
289
[57] = { RC_HT_DT_40, WLAN_RC_PHY_HT_40_DS, 243000,
290
178200, 14, 14, 8, 57, 57, 57 }, /* 243 Mb */
291
[58] = { RC_HT_DT_40, WLAN_RC_PHY_HT_40_DS, 270000,
292
192100, 15, 15, 8, 58, 59, 59 }, /* 270 Mb */
293
[59] = { RC_HT_DT_40, WLAN_RC_PHY_HT_40_DS_HGI, 300000,
294
207000, 15, 15, 8, 58, 59, 59 }, /* 300 Mb */
295
[60] = { RC_INVALID, WLAN_RC_PHY_HT_40_TS, 40500,
296
36100, 16, 16, 8, 60, 60, 60 }, /* 40.5 Mb */
297
[61] = { RC_INVALID, WLAN_RC_PHY_HT_40_TS, 81000,
298
72900, 17, 17, 8, 61, 61, 61 }, /* 81 Mb */
299
[62] = { RC_INVALID, WLAN_RC_PHY_HT_40_TS, 121500,
300
108300, 18, 18, 8, 62, 62, 62 }, /* 121.5 Mb */
301
[63] = { RC_INVALID, WLAN_RC_PHY_HT_40_TS, 162000,
302
142000, 19, 19, 8, 63, 63, 63 }, /* 162 Mb */
303
[64] = { RC_INVALID, WLAN_RC_PHY_HT_40_TS, 243000,
304
205100, 20, 20, 8, 64, 65, 65 }, /* 243 Mb */
305
[65] = { RC_INVALID, WLAN_RC_PHY_HT_40_TS_HGI, 270000,
306
224700, 20, 20, 8, 64, 65, 65 }, /* 270 Mb */
307
[66] = { RC_HT_T_40, WLAN_RC_PHY_HT_40_TS, 324000,
308
263100, 21, 21, 8, 66, 67, 67 }, /* 324 Mb */
309
[67] = { RC_HT_T_40, WLAN_RC_PHY_HT_40_TS_HGI, 360000,
310
288000, 21, 21, 8, 66, 67, 67 }, /* 360 Mb */
311
[68] = { RC_HT_T_40, WLAN_RC_PHY_HT_40_TS, 364500,
312
290700, 22, 22, 8, 68, 69, 69 }, /* 364.5 Mb */
313
[69] = { RC_HT_T_40, WLAN_RC_PHY_HT_40_TS_HGI, 405000,
314
317200, 22, 22, 8, 68, 69, 69 }, /* 405 Mb */
315
[70] = { RC_HT_T_40, WLAN_RC_PHY_HT_40_TS, 405000,
316
317200, 23, 23, 8, 70, 71, 71 }, /* 405 Mb */
317
[71] = { RC_HT_T_40, WLAN_RC_PHY_HT_40_TS_HGI, 450000,
318
346400, 23, 23, 8, 70, 71, 71 }, /* 450 Mb */
320
50, /* probe interval */
321
WLAN_RC_HT_FLAG, /* Phy rates allowed initially */
324
static const struct ath_rate_table ar5416_11a_ratetable = {
328
{ RC_L_SDT, WLAN_RC_PHY_OFDM, 6000, /* 6 Mb */
330
{ RC_L_SDT, WLAN_RC_PHY_OFDM, 9000, /* 9 Mb */
332
{ RC_L_SDT, WLAN_RC_PHY_OFDM, 12000, /* 12 Mb */
334
{ RC_L_SDT, WLAN_RC_PHY_OFDM, 18000, /* 18 Mb */
336
{ RC_L_SDT, WLAN_RC_PHY_OFDM, 24000, /* 24 Mb */
338
{ RC_L_SDT, WLAN_RC_PHY_OFDM, 36000, /* 36 Mb */
340
{ RC_L_SDT, WLAN_RC_PHY_OFDM, 48000, /* 48 Mb */
342
{ RC_L_SDT, WLAN_RC_PHY_OFDM, 54000, /* 54 Mb */
345
50, /* probe interval */
346
0, /* Phy rates allowed initially */
349
static const struct ath_rate_table ar5416_11g_ratetable = {
353
{ RC_L_SDT, WLAN_RC_PHY_CCK, 1000, /* 1 Mb */
355
{ RC_L_SDT, WLAN_RC_PHY_CCK, 2000, /* 2 Mb */
357
{ RC_L_SDT, WLAN_RC_PHY_CCK, 5500, /* 5.5 Mb */
359
{ RC_L_SDT, WLAN_RC_PHY_CCK, 11000, /* 11 Mb */
361
{ RC_INVALID, WLAN_RC_PHY_OFDM, 6000, /* 6 Mb */
363
{ RC_INVALID, WLAN_RC_PHY_OFDM, 9000, /* 9 Mb */
365
{ RC_L_SDT, WLAN_RC_PHY_OFDM, 12000, /* 12 Mb */
367
{ RC_L_SDT, WLAN_RC_PHY_OFDM, 18000, /* 18 Mb */
369
{ RC_L_SDT, WLAN_RC_PHY_OFDM, 24000, /* 24 Mb */
371
{ RC_L_SDT, WLAN_RC_PHY_OFDM, 36000, /* 36 Mb */
373
{ RC_L_SDT, WLAN_RC_PHY_OFDM, 48000, /* 48 Mb */
375
{ RC_L_SDT, WLAN_RC_PHY_OFDM, 54000, /* 54 Mb */
378
50, /* probe interval */
379
0, /* Phy rates allowed initially */
382
static int ath_rc_get_rateindex(const struct ath_rate_table *rate_table,
383
struct ieee80211_tx_rate *rate)
386
static const int mcs_rix_off[] = { 7, 15, 20, 21, 22, 23 };
388
if (!(rate->flags & IEEE80211_TX_RC_MCS))
391
while (i < ARRAY_SIZE(mcs_rix_off) && rate->idx > mcs_rix_off[i]) {
395
rix += rate->idx + rate_table->mcs_start;
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;
408
static void ath_rc_sort_validrates(const struct ath_rate_table *rate_table,
409
struct ath_rate_priv *ath_rc_priv)
411
u8 i, j, idx, idx_next;
413
for (i = ath_rc_priv->max_valid_rate - 1; i > 0; i--) {
414
for (j = 0; j <= i-1; j++) {
415
idx = ath_rc_priv->valid_rate_index[j];
416
idx_next = ath_rc_priv->valid_rate_index[j+1];
418
if (rate_table->info[idx].ratekbps >
419
rate_table->info[idx_next].ratekbps) {
420
ath_rc_priv->valid_rate_index[j] = idx_next;
421
ath_rc_priv->valid_rate_index[j+1] = idx;
427
static void ath_rc_init_valid_rate_idx(struct ath_rate_priv *ath_rc_priv)
431
for (i = 0; i < ath_rc_priv->rate_table_size; i++)
432
ath_rc_priv->valid_rate_index[i] = 0;
435
static inline void ath_rc_set_valid_rate_idx(struct ath_rate_priv *ath_rc_priv,
436
u8 index, int valid_tx_rate)
438
BUG_ON(index > ath_rc_priv->rate_table_size);
439
ath_rc_priv->valid_rate_index[index] = !!valid_tx_rate;
443
int ath_rc_get_nextvalid_txrate(const struct ath_rate_table *rate_table,
444
struct ath_rate_priv *ath_rc_priv,
450
for (i = 0; i < ath_rc_priv->max_valid_rate - 1; i++) {
451
if (ath_rc_priv->valid_rate_index[i] == cur_valid_txrate) {
452
*next_idx = ath_rc_priv->valid_rate_index[i+1];
457
/* No more valid rates */
463
/* Return true only for single stream */
465
static int ath_rc_valid_phyrate(u32 phy, u32 capflag, int ignore_cw)
467
if (WLAN_RC_PHY_HT(phy) && !(capflag & WLAN_RC_HT_FLAG))
469
if (WLAN_RC_PHY_DS(phy) && !(capflag & WLAN_RC_DS_FLAG))
471
if (WLAN_RC_PHY_TS(phy) && !(capflag & WLAN_RC_TS_FLAG))
473
if (WLAN_RC_PHY_SGI(phy) && !(capflag & WLAN_RC_SGI_FLAG))
475
if (!ignore_cw && WLAN_RC_PHY_HT(phy))
476
if (WLAN_RC_PHY_40(phy) && !(capflag & WLAN_RC_40_FLAG))
482
ath_rc_get_lower_rix(const struct ath_rate_table *rate_table,
483
struct ath_rate_priv *ath_rc_priv,
484
u8 cur_valid_txrate, u8 *next_idx)
488
for (i = 1; i < ath_rc_priv->max_valid_rate ; i++) {
489
if (ath_rc_priv->valid_rate_index[i] == cur_valid_txrate) {
490
*next_idx = ath_rc_priv->valid_rate_index[i-1];
498
static u8 ath_rc_init_validrates(struct ath_rate_priv *ath_rc_priv,
499
const struct ath_rate_table *rate_table,
504
for (i = 0; i < rate_table->rate_cnt; i++) {
505
if (rate_table->info[i].rate_flags & RC_LEGACY) {
506
u32 phy = rate_table->info[i].phy;
507
u8 valid_rate_count = 0;
509
if (!ath_rc_valid_phyrate(phy, capflag, 0))
512
valid_rate_count = ath_rc_priv->valid_phy_ratecnt[phy];
514
ath_rc_priv->valid_phy_rateidx[phy][valid_rate_count] = i;
515
ath_rc_priv->valid_phy_ratecnt[phy] += 1;
516
ath_rc_set_valid_rate_idx(ath_rc_priv, i, 1);
524
static u8 ath_rc_setvalid_rates(struct ath_rate_priv *ath_rc_priv,
525
const struct ath_rate_table *rate_table,
526
struct ath_rateset *rateset,
531
/* Use intersection of working rates and valid rates */
532
for (i = 0; i < rateset->rs_nrates; i++) {
533
for (j = 0; j < rate_table->rate_cnt; j++) {
534
u32 phy = rate_table->info[j].phy;
535
u16 rate_flags = rate_table->info[j].rate_flags;
536
u8 rate = rateset->rs_rates[i];
537
u8 dot11rate = rate_table->info[j].dot11rate;
539
/* We allow a rate only if its valid and the
540
* capflag matches one of the validity
541
* (VALID/VALID_20/VALID_40) flags */
543
if ((rate == dot11rate) &&
544
(rate_flags & WLAN_RC_CAP_MODE(capflag)) ==
545
WLAN_RC_CAP_MODE(capflag) &&
546
(rate_flags & WLAN_RC_CAP_STREAM(capflag)) &&
547
!WLAN_RC_PHY_HT(phy)) {
548
u8 valid_rate_count = 0;
550
if (!ath_rc_valid_phyrate(phy, capflag, 0))
554
ath_rc_priv->valid_phy_ratecnt[phy];
556
ath_rc_priv->valid_phy_rateidx[phy]
557
[valid_rate_count] = j;
558
ath_rc_priv->valid_phy_ratecnt[phy] += 1;
559
ath_rc_set_valid_rate_idx(ath_rc_priv, j, 1);
568
static u8 ath_rc_setvalid_htrates(struct ath_rate_priv *ath_rc_priv,
569
const struct ath_rate_table *rate_table,
570
u8 *mcs_set, u32 capflag)
572
struct ath_rateset *rateset = (struct ath_rateset *)mcs_set;
576
/* Use intersection of working rates and valid rates */
577
for (i = 0; i < rateset->rs_nrates; i++) {
578
for (j = 0; j < rate_table->rate_cnt; j++) {
579
u32 phy = rate_table->info[j].phy;
580
u16 rate_flags = rate_table->info[j].rate_flags;
581
u8 rate = rateset->rs_rates[i];
582
u8 dot11rate = rate_table->info[j].dot11rate;
584
if ((rate != dot11rate) || !WLAN_RC_PHY_HT(phy) ||
585
!(rate_flags & WLAN_RC_CAP_STREAM(capflag)) ||
586
!WLAN_RC_PHY_HT_VALID(rate_flags, capflag))
589
if (!ath_rc_valid_phyrate(phy, capflag, 0))
592
ath_rc_priv->valid_phy_rateidx[phy]
593
[ath_rc_priv->valid_phy_ratecnt[phy]] = j;
594
ath_rc_priv->valid_phy_ratecnt[phy] += 1;
595
ath_rc_set_valid_rate_idx(ath_rc_priv, j, 1);
603
/* Finds the highest rate index we can use */
604
static u8 ath_rc_get_highest_rix(struct ath_softc *sc,
605
struct ath_rate_priv *ath_rc_priv,
606
const struct ath_rate_table *rate_table,
610
u32 best_thruput, this_thruput, now_msec;
611
u8 rate, next_rate, best_rate, maxindex, minindex;
614
now_msec = jiffies_to_msecs(jiffies);
617
maxindex = ath_rc_priv->max_valid_rate-1;
619
best_rate = minindex;
622
* Try the higher rate first. It will reduce memory moving time
623
* if we have very good channel characteristics.
625
for (index = maxindex; index >= minindex ; index--) {
628
rate = ath_rc_priv->valid_rate_index[index];
629
if (legacy && !(rate_table->info[rate].rate_flags & RC_LEGACY))
631
if (rate > ath_rc_priv->rate_max_phy)
635
* For TCP the average collision rate is around 11%,
636
* so we ignore PERs less than this. This is to
637
* prevent the rate we are currently using (whose
638
* PER might be in the 10-15 range because of TCP
639
* collisions) looking worse than the next lower
640
* rate whose PER has decayed close to 0. If we
641
* used to next lower rate, its PER would grow to
642
* 10-15 and we would be worse off then staying
643
* at the current rate.
645
per_thres = ath_rc_priv->per[rate];
649
this_thruput = rate_table->info[rate].user_ratekbps *
652
if (best_thruput <= this_thruput) {
653
best_thruput = this_thruput;
661
* Must check the actual rate (ratekbps) to account for
662
* non-monoticity of 11g's rate table
665
if (rate >= ath_rc_priv->rate_max_phy) {
666
rate = ath_rc_priv->rate_max_phy;
668
/* Probe the next allowed phy state */
669
if (ath_rc_get_nextvalid_txrate(rate_table,
670
ath_rc_priv, rate, &next_rate) &&
671
(now_msec - ath_rc_priv->probe_time >
672
rate_table->probe_interval) &&
673
(ath_rc_priv->hw_maxretry_pktcnt >= 1)) {
675
ath_rc_priv->probe_rate = rate;
676
ath_rc_priv->probe_time = now_msec;
677
ath_rc_priv->hw_maxretry_pktcnt = 0;
682
if (rate > (ath_rc_priv->rate_table_size - 1))
683
rate = ath_rc_priv->rate_table_size - 1;
685
if (RC_TS_ONLY(rate_table->info[rate].rate_flags) &&
686
(ath_rc_priv->ht_cap & WLAN_RC_TS_FLAG))
689
if (RC_DS_OR_LATER(rate_table->info[rate].rate_flags) &&
690
(ath_rc_priv->ht_cap & (WLAN_RC_DS_FLAG | WLAN_RC_TS_FLAG)))
693
if (RC_SS_OR_LEGACY(rate_table->info[rate].rate_flags))
696
/* This should not happen */
699
rate = ath_rc_priv->valid_rate_index[0];
704
static void ath_rc_rate_set_series(const struct ath_rate_table *rate_table,
705
struct ieee80211_tx_rate *rate,
706
struct ieee80211_tx_rate_control *txrc,
707
u8 tries, u8 rix, int rtsctsenable)
710
rate->idx = rate_table->info[rix].ratecode;
712
if (txrc->short_preamble)
713
rate->flags |= IEEE80211_TX_RC_USE_SHORT_PREAMBLE;
714
if (txrc->rts || rtsctsenable)
715
rate->flags |= IEEE80211_TX_RC_USE_RTS_CTS;
717
if (WLAN_RC_PHY_HT(rate_table->info[rix].phy)) {
718
rate->flags |= IEEE80211_TX_RC_MCS;
719
if (WLAN_RC_PHY_40(rate_table->info[rix].phy) &&
720
conf_is_ht40(&txrc->hw->conf))
721
rate->flags |= IEEE80211_TX_RC_40_MHZ_WIDTH;
722
if (WLAN_RC_PHY_SGI(rate_table->info[rix].phy))
723
rate->flags |= IEEE80211_TX_RC_SHORT_GI;
727
static void ath_rc_rate_set_rtscts(struct ath_softc *sc,
728
const struct ath_rate_table *rate_table,
729
struct ieee80211_tx_info *tx_info)
731
struct ieee80211_tx_rate *rates = tx_info->control.rates;
732
int i = 0, rix = 0, cix, enable_g_protection = 0;
734
/* get the cix for the lowest valid rix */
735
for (i = 3; i >= 0; i--) {
736
if (rates[i].count && (rates[i].idx >= 0)) {
737
rix = ath_rc_get_rateindex(rate_table, &rates[i]);
741
cix = rate_table->info[rix].ctrl_rate;
743
/* All protection frames are transmited at 2Mb/s for 802.11g,
744
* otherwise we transmit them at 1Mb/s */
745
if (sc->hw->conf.channel->band == IEEE80211_BAND_2GHZ &&
746
!conf_is_ht(&sc->hw->conf))
747
enable_g_protection = 1;
750
* If 802.11g protection is enabled, determine whether to use RTS/CTS or
751
* just CTS. Note that this is only done for OFDM/HT unicast frames.
753
if ((sc->sc_flags & SC_OP_PROTECT_ENABLE) &&
754
(rate_table->info[rix].phy == WLAN_RC_PHY_OFDM ||
755
WLAN_RC_PHY_HT(rate_table->info[rix].phy))) {
756
rates[0].flags |= IEEE80211_TX_RC_USE_CTS_PROTECT;
757
cix = rate_table->info[enable_g_protection].ctrl_rate;
760
tx_info->control.rts_cts_rate_idx = cix;
763
static void ath_get_rate(void *priv, struct ieee80211_sta *sta, void *priv_sta,
764
struct ieee80211_tx_rate_control *txrc)
766
struct ath_softc *sc = priv;
767
struct ath_rate_priv *ath_rc_priv = priv_sta;
768
const struct ath_rate_table *rate_table;
769
struct sk_buff *skb = txrc->skb;
770
struct ieee80211_tx_info *tx_info = IEEE80211_SKB_CB(skb);
771
struct ieee80211_tx_rate *rates = tx_info->control.rates;
772
struct ieee80211_hdr *hdr = (struct ieee80211_hdr *)skb->data;
773
__le16 fc = hdr->frame_control;
774
u8 try_per_rate, i = 0, rix, high_rix;
777
if (rate_control_send_low(sta, priv_sta, txrc))
781
* For Multi Rate Retry we use a different number of
782
* retry attempt counts. This ends up looking like this:
792
rate_table = ath_rc_priv->rate_table;
793
rix = ath_rc_get_highest_rix(sc, ath_rc_priv, rate_table,
798
* If we're in HT mode and both us and our peer supports LDPC.
799
* We don't need to check our own device's capabilities as our own
800
* ht capabilities would have already been intersected with our peer's.
802
if (conf_is_ht(&sc->hw->conf) &&
803
(sta->ht_cap.cap & IEEE80211_HT_CAP_LDPC_CODING))
804
tx_info->flags |= IEEE80211_TX_CTL_LDPC;
806
if (conf_is_ht(&sc->hw->conf) &&
807
(sta->ht_cap.cap & IEEE80211_HT_CAP_TX_STBC))
808
tx_info->flags |= (1 << IEEE80211_TX_CTL_STBC_SHIFT);
811
/* set one try for probe rates. For the
812
* probes don't enable rts */
813
ath_rc_rate_set_series(rate_table, &rates[i++], txrc,
816
/* Get the next tried/allowed rate. No RTS for the next series
817
* after the probe rate
819
ath_rc_get_lower_rix(rate_table, ath_rc_priv, rix, &rix);
820
ath_rc_rate_set_series(rate_table, &rates[i++], txrc,
821
try_per_rate, rix, 0);
823
tx_info->flags |= IEEE80211_TX_CTL_RATE_CTRL_PROBE;
825
/* Set the chosen rate. No RTS for first series entry. */
826
ath_rc_rate_set_series(rate_table, &rates[i++], txrc,
827
try_per_rate, rix, 0);
830
/* Fill in the other rates for multirate retry */
831
for ( ; i < 3; i++) {
833
ath_rc_get_lower_rix(rate_table, ath_rc_priv, rix, &rix);
834
/* All other rates in the series have RTS enabled */
835
ath_rc_rate_set_series(rate_table, &rates[i], txrc,
836
try_per_rate, rix, 1);
839
/* Use twice the number of tries for the last MRR segment. */
843
* Use a legacy rate as last retry to ensure that the frame
844
* is tried in both MCS and legacy rates.
846
if ((rates[2].flags & IEEE80211_TX_RC_MCS) &&
847
(!(tx_info->flags & IEEE80211_TX_CTL_AMPDU) ||
848
(ath_rc_priv->per[high_rix] > 45)))
849
rix = ath_rc_get_highest_rix(sc, ath_rc_priv, rate_table,
852
ath_rc_get_lower_rix(rate_table, ath_rc_priv, rix, &rix);
854
/* All other rates in the series have RTS enabled */
855
ath_rc_rate_set_series(rate_table, &rates[i], txrc,
856
try_per_rate, rix, 1);
858
* NB:Change rate series to enable aggregation when operating
859
* at lower MCS rates. When first rate in series is MCS2
860
* in HT40 @ 2.4GHz, series should look like:
862
* {MCS2, MCS1, MCS0, MCS0}.
864
* When first rate in series is MCS3 in HT20 @ 2.4GHz, series should
867
* {MCS3, MCS2, MCS1, MCS1}
869
* So, set fourth rate in series to be same as third one for
872
if ((sc->hw->conf.channel->band == IEEE80211_BAND_2GHZ) &&
873
(conf_is_ht(&sc->hw->conf))) {
874
u8 dot11rate = rate_table->info[rix].dot11rate;
875
u8 phy = rate_table->info[rix].phy;
877
((dot11rate == 2 && phy == WLAN_RC_PHY_HT_40_SS) ||
878
(dot11rate == 3 && phy == WLAN_RC_PHY_HT_20_SS))) {
879
rates[3].idx = rates[2].idx;
880
rates[3].flags = rates[2].flags;
885
* Force hardware to use computed duration for next
886
* fragment by disabling multi-rate retry, which
887
* updates duration based on the multi-rate duration table.
889
* FIXME: Fix duration
891
if (ieee80211_has_morefrags(fc) ||
892
(le16_to_cpu(hdr->seq_ctrl) & IEEE80211_SCTL_FRAG)) {
893
rates[1].count = rates[2].count = rates[3].count = 0;
894
rates[1].idx = rates[2].idx = rates[3].idx = 0;
895
rates[0].count = ATH_TXMAXTRY;
899
ath_rc_rate_set_rtscts(sc, rate_table, tx_info);
902
static void ath_rc_update_per(struct ath_softc *sc,
903
const struct ath_rate_table *rate_table,
904
struct ath_rate_priv *ath_rc_priv,
905
struct ieee80211_tx_info *tx_info,
906
int tx_rate, int xretries, int retries,
909
int count, n_bad_frames;
911
static const u32 nretry_to_per_lookup[10] = {
924
last_per = ath_rc_priv->per[tx_rate];
925
n_bad_frames = tx_info->status.ampdu_len - tx_info->status.ampdu_ack_len;
929
ath_rc_priv->per[tx_rate] += 30;
930
if (ath_rc_priv->per[tx_rate] > 100)
931
ath_rc_priv->per[tx_rate] = 100;
934
count = ARRAY_SIZE(nretry_to_per_lookup);
935
if (retries >= count)
938
/* new_PER = 7/8*old_PER + 1/8*(currentPER) */
939
ath_rc_priv->per[tx_rate] =
940
(u8)(last_per - (last_per >> 3) + (100 >> 3));
943
/* xretries == 1 or 2 */
945
if (ath_rc_priv->probe_rate == tx_rate)
946
ath_rc_priv->probe_rate = 0;
948
} else { /* xretries == 0 */
949
count = ARRAY_SIZE(nretry_to_per_lookup);
950
if (retries >= count)
954
/* new_PER = 7/8*old_PER + 1/8*(currentPER)
955
* Assuming that n_frames is not 0. The current PER
956
* from the retries is 100 * retries / (retries+1),
957
* since the first retries attempts failed, and the
958
* next one worked. For the one that worked,
959
* n_bad_frames subframes out of n_frames wored,
960
* so the PER for that part is
961
* 100 * n_bad_frames / n_frames, and it contributes
962
* 100 * n_bad_frames / (n_frames * (retries+1)) to
963
* the above PER. The expression below is a
964
* simplified version of the sum of these two terms.
966
if (tx_info->status.ampdu_len > 0) {
967
int n_frames, n_bad_tries;
970
n_bad_tries = retries * tx_info->status.ampdu_len +
972
n_frames = tx_info->status.ampdu_len * (retries + 1);
973
cur_per = (100 * n_bad_tries / n_frames) >> 3;
974
new_per = (u8)(last_per - (last_per >> 3) + cur_per);
975
ath_rc_priv->per[tx_rate] = new_per;
978
ath_rc_priv->per[tx_rate] =
979
(u8)(last_per - (last_per >> 3) +
980
(nretry_to_per_lookup[retries] >> 3));
985
* If we got at most one retry then increase the max rate if
986
* this was a probe. Otherwise, ignore the probe.
988
if (ath_rc_priv->probe_rate && ath_rc_priv->probe_rate == tx_rate) {
989
if (retries > 0 || 2 * n_bad_frames > tx_info->status.ampdu_len) {
991
* Since we probed with just a single attempt,
992
* any retries means the probe failed. Also,
993
* if the attempt worked, but more than half
994
* the subframes were bad then also consider
995
* the probe a failure.
997
ath_rc_priv->probe_rate = 0;
1001
ath_rc_priv->rate_max_phy =
1002
ath_rc_priv->probe_rate;
1003
probe_rate = ath_rc_priv->probe_rate;
1005
if (ath_rc_priv->per[probe_rate] > 30)
1006
ath_rc_priv->per[probe_rate] = 20;
1008
ath_rc_priv->probe_rate = 0;
1011
* Since this probe succeeded, we allow the next
1012
* probe twice as soon. This allows the maxRate
1013
* to move up faster if the probes are
1016
ath_rc_priv->probe_time =
1017
now_msec - rate_table->probe_interval / 2;
1023
* Don't update anything. We don't know if
1024
* this was because of collisions or poor signal.
1026
ath_rc_priv->hw_maxretry_pktcnt = 0;
1029
* It worked with no retries. First ignore bogus (small)
1032
if (tx_rate == ath_rc_priv->rate_max_phy &&
1033
ath_rc_priv->hw_maxretry_pktcnt < 255) {
1034
ath_rc_priv->hw_maxretry_pktcnt++;
1041
static void ath_debug_stat_retries(struct ath_rate_priv *rc, int rix,
1042
int xretries, int retries, u8 per)
1044
struct ath_rc_stats *stats = &rc->rcstats[rix];
1046
stats->xretries += xretries;
1047
stats->retries += retries;
1051
/* Update PER, RSSI and whatever else that the code thinks it is doing.
1052
If you can make sense of all this, you really need to go out more. */
1054
static void ath_rc_update_ht(struct ath_softc *sc,
1055
struct ath_rate_priv *ath_rc_priv,
1056
struct ieee80211_tx_info *tx_info,
1057
int tx_rate, int xretries, int retries)
1059
u32 now_msec = jiffies_to_msecs(jiffies);
1062
const struct ath_rate_table *rate_table = ath_rc_priv->rate_table;
1063
int size = ath_rc_priv->rate_table_size;
1065
if ((tx_rate < 0) || (tx_rate > rate_table->rate_cnt))
1068
last_per = ath_rc_priv->per[tx_rate];
1070
/* Update PER first */
1071
ath_rc_update_per(sc, rate_table, ath_rc_priv,
1072
tx_info, tx_rate, xretries,
1076
* If this rate looks bad (high PER) then stop using it for
1077
* a while (except if we are probing).
1079
if (ath_rc_priv->per[tx_rate] >= 55 && tx_rate > 0 &&
1080
rate_table->info[tx_rate].ratekbps <=
1081
rate_table->info[ath_rc_priv->rate_max_phy].ratekbps) {
1082
ath_rc_get_lower_rix(rate_table, ath_rc_priv,
1083
(u8)tx_rate, &ath_rc_priv->rate_max_phy);
1085
/* Don't probe for a little while. */
1086
ath_rc_priv->probe_time = now_msec;
1089
/* Make sure the rates below this have lower PER */
1090
/* Monotonicity is kept only for rates below the current rate. */
1091
if (ath_rc_priv->per[tx_rate] < last_per) {
1092
for (rate = tx_rate - 1; rate >= 0; rate--) {
1094
if (ath_rc_priv->per[rate] >
1095
ath_rc_priv->per[rate+1]) {
1096
ath_rc_priv->per[rate] =
1097
ath_rc_priv->per[rate+1];
1102
/* Maintain monotonicity for rates above the current rate */
1103
for (rate = tx_rate; rate < size - 1; rate++) {
1104
if (ath_rc_priv->per[rate+1] <
1105
ath_rc_priv->per[rate])
1106
ath_rc_priv->per[rate+1] =
1107
ath_rc_priv->per[rate];
1110
/* Every so often, we reduce the thresholds
1111
* and PER (different for CCK and OFDM). */
1112
if (now_msec - ath_rc_priv->per_down_time >=
1113
rate_table->probe_interval) {
1114
for (rate = 0; rate < size; rate++) {
1115
ath_rc_priv->per[rate] =
1116
7 * ath_rc_priv->per[rate] / 8;
1119
ath_rc_priv->per_down_time = now_msec;
1122
ath_debug_stat_retries(ath_rc_priv, tx_rate, xretries, retries,
1123
ath_rc_priv->per[tx_rate]);
1128
static void ath_rc_tx_status(struct ath_softc *sc,
1129
struct ath_rate_priv *ath_rc_priv,
1130
struct ieee80211_tx_info *tx_info,
1131
int final_ts_idx, int xretries, int long_retry)
1133
const struct ath_rate_table *rate_table;
1134
struct ieee80211_tx_rate *rates = tx_info->status.rates;
1138
rate_table = ath_rc_priv->rate_table;
1141
* If the first rate is not the final index, there
1142
* are intermediate rate failures to be processed.
1144
if (final_ts_idx != 0) {
1145
/* Process intermediate rates that failed.*/
1146
for (i = 0; i < final_ts_idx ; i++) {
1147
if (rates[i].count != 0 && (rates[i].idx >= 0)) {
1148
flags = rates[i].flags;
1150
/* If HT40 and we have switched mode from
1151
* 40 to 20 => don't update */
1153
if ((flags & IEEE80211_TX_RC_40_MHZ_WIDTH) &&
1154
!(ath_rc_priv->ht_cap & WLAN_RC_40_FLAG))
1157
rix = ath_rc_get_rateindex(rate_table, &rates[i]);
1158
ath_rc_update_ht(sc, ath_rc_priv, tx_info,
1159
rix, xretries ? 1 : 2,
1165
* Handle the special case of MIMO PS burst, where the second
1166
* aggregate is sent out with only one rate and one try.
1167
* Treating it as an excessive retry penalizes the rate
1170
if (rates[0].count == 1 && xretries == 1)
1174
flags = rates[i].flags;
1176
/* If HT40 and we have switched mode from 40 to 20 => don't update */
1177
if ((flags & IEEE80211_TX_RC_40_MHZ_WIDTH) &&
1178
!(ath_rc_priv->ht_cap & WLAN_RC_40_FLAG))
1181
rix = ath_rc_get_rateindex(rate_table, &rates[i]);
1182
ath_rc_update_ht(sc, ath_rc_priv, tx_info, rix, xretries, long_retry);
1186
struct ath_rate_table *ath_choose_rate_table(struct ath_softc *sc,
1187
enum ieee80211_band band,
1190
struct ath_common *common = ath9k_hw_common(sc->sc_ah);
1193
case IEEE80211_BAND_2GHZ:
1195
return &ar5416_11ng_ratetable;
1196
return &ar5416_11g_ratetable;
1197
case IEEE80211_BAND_5GHZ:
1199
return &ar5416_11na_ratetable;
1200
return &ar5416_11a_ratetable;
1202
ath_dbg(common, ATH_DBG_CONFIG, "Invalid band\n");
1207
static void ath_rc_init(struct ath_softc *sc,
1208
struct ath_rate_priv *ath_rc_priv,
1209
struct ieee80211_supported_band *sband,
1210
struct ieee80211_sta *sta,
1211
const struct ath_rate_table *rate_table)
1213
struct ath_rateset *rateset = &ath_rc_priv->neg_rates;
1214
struct ath_common *common = ath9k_hw_common(sc->sc_ah);
1215
u8 *ht_mcs = (u8 *)&ath_rc_priv->neg_ht_rates;
1216
u8 i, j, k, hi = 0, hthi = 0;
1218
/* Initial rate table size. Will change depending
1219
* on the working rate set */
1220
ath_rc_priv->rate_table_size = RATE_TABLE_SIZE;
1222
/* Initialize thresholds according to the global rate table */
1223
for (i = 0 ; i < ath_rc_priv->rate_table_size; i++) {
1224
ath_rc_priv->per[i] = 0;
1227
/* Determine the valid rates */
1228
ath_rc_init_valid_rate_idx(ath_rc_priv);
1230
for (i = 0; i < WLAN_RC_PHY_MAX; i++) {
1231
for (j = 0; j < MAX_TX_RATE_PHY; j++)
1232
ath_rc_priv->valid_phy_rateidx[i][j] = 0;
1233
ath_rc_priv->valid_phy_ratecnt[i] = 0;
1236
if (!rateset->rs_nrates) {
1237
/* No working rate, just initialize valid rates */
1238
hi = ath_rc_init_validrates(ath_rc_priv, rate_table,
1239
ath_rc_priv->ht_cap);
1241
/* Use intersection of working rates and valid rates */
1242
hi = ath_rc_setvalid_rates(ath_rc_priv, rate_table,
1243
rateset, ath_rc_priv->ht_cap);
1244
if (ath_rc_priv->ht_cap & WLAN_RC_HT_FLAG) {
1245
hthi = ath_rc_setvalid_htrates(ath_rc_priv,
1248
ath_rc_priv->ht_cap);
1253
ath_rc_priv->rate_table_size = hi + 1;
1254
ath_rc_priv->rate_max_phy = 0;
1255
BUG_ON(ath_rc_priv->rate_table_size > RATE_TABLE_SIZE);
1257
for (i = 0, k = 0; i < WLAN_RC_PHY_MAX; i++) {
1258
for (j = 0; j < ath_rc_priv->valid_phy_ratecnt[i]; j++) {
1259
ath_rc_priv->valid_rate_index[k++] =
1260
ath_rc_priv->valid_phy_rateidx[i][j];
1263
if (!ath_rc_valid_phyrate(i, rate_table->initial_ratemax, 1)
1264
|| !ath_rc_priv->valid_phy_ratecnt[i])
1267
ath_rc_priv->rate_max_phy = ath_rc_priv->valid_phy_rateidx[i][j-1];
1269
BUG_ON(ath_rc_priv->rate_table_size > RATE_TABLE_SIZE);
1270
BUG_ON(k > RATE_TABLE_SIZE);
1272
ath_rc_priv->max_valid_rate = k;
1273
ath_rc_sort_validrates(rate_table, ath_rc_priv);
1274
ath_rc_priv->rate_max_phy = (k > 4) ?
1275
ath_rc_priv->valid_rate_index[k-4] :
1276
ath_rc_priv->valid_rate_index[k-1];
1277
ath_rc_priv->rate_table = rate_table;
1279
ath_dbg(common, ATH_DBG_CONFIG,
1280
"RC Initialized with capabilities: 0x%x\n",
1281
ath_rc_priv->ht_cap);
1284
static u8 ath_rc_build_ht_caps(struct ath_softc *sc, struct ieee80211_sta *sta,
1285
bool is_cw40, bool is_sgi)
1289
if (sta->ht_cap.ht_supported) {
1290
caps = WLAN_RC_HT_FLAG;
1291
if (sta->ht_cap.mcs.rx_mask[1] && sta->ht_cap.mcs.rx_mask[2])
1292
caps |= WLAN_RC_TS_FLAG | WLAN_RC_DS_FLAG;
1293
else if (sta->ht_cap.mcs.rx_mask[1])
1294
caps |= WLAN_RC_DS_FLAG;
1296
caps |= WLAN_RC_40_FLAG;
1298
caps |= WLAN_RC_SGI_FLAG;
1304
static bool ath_tx_aggr_check(struct ath_softc *sc, struct ath_node *an,
1307
struct ath_atx_tid *txtid;
1309
if (!(sc->sc_flags & SC_OP_TXAGGR))
1312
txtid = ATH_AN_2_TID(an, tidno);
1314
if (!(txtid->state & (AGGR_ADDBA_COMPLETE | AGGR_ADDBA_PROGRESS)))
1320
/***********************************/
1321
/* mac80211 Rate Control callbacks */
1322
/***********************************/
1324
static void ath_debug_stat_rc(struct ath_rate_priv *rc, int final_rate)
1326
struct ath_rc_stats *stats;
1328
stats = &rc->rcstats[final_rate];
1333
static void ath_tx_status(void *priv, struct ieee80211_supported_band *sband,
1334
struct ieee80211_sta *sta, void *priv_sta,
1335
struct sk_buff *skb)
1337
struct ath_softc *sc = priv;
1338
struct ath_rate_priv *ath_rc_priv = priv_sta;
1339
struct ieee80211_tx_info *tx_info = IEEE80211_SKB_CB(skb);
1340
struct ieee80211_hdr *hdr;
1341
int final_ts_idx = 0, tx_status = 0;
1346
hdr = (struct ieee80211_hdr *)skb->data;
1347
fc = hdr->frame_control;
1348
for (i = 0; i < sc->hw->max_rates; i++) {
1349
struct ieee80211_tx_rate *rate = &tx_info->status.rates[i];
1354
long_retry = rate->count - 1;
1357
if (!priv_sta || !ieee80211_is_data(fc))
1360
/* This packet was aggregated but doesn't carry status info */
1361
if ((tx_info->flags & IEEE80211_TX_CTL_AMPDU) &&
1362
!(tx_info->flags & IEEE80211_TX_STAT_AMPDU))
1365
if (tx_info->flags & IEEE80211_TX_STAT_TX_FILTERED)
1368
if (!(tx_info->flags & IEEE80211_TX_STAT_ACK))
1371
ath_rc_tx_status(sc, ath_rc_priv, tx_info, final_ts_idx, tx_status,
1374
/* Check if aggregation has to be enabled for this tid */
1375
if (conf_is_ht(&sc->hw->conf) &&
1376
!(skb->protocol == cpu_to_be16(ETH_P_PAE))) {
1377
if (ieee80211_is_data_qos(fc) &&
1378
skb_get_queue_mapping(skb) != IEEE80211_AC_VO) {
1380
struct ath_node *an;
1382
qc = ieee80211_get_qos_ctl(hdr);
1384
an = (struct ath_node *)sta->drv_priv;
1386
if(ath_tx_aggr_check(sc, an, tid))
1387
ieee80211_start_tx_ba_session(sta, tid, 0);
1391
ath_debug_stat_rc(ath_rc_priv,
1392
ath_rc_get_rateindex(ath_rc_priv->rate_table,
1393
&tx_info->status.rates[final_ts_idx]));
1396
static void ath_rate_init(void *priv, struct ieee80211_supported_band *sband,
1397
struct ieee80211_sta *sta, void *priv_sta)
1399
struct ath_softc *sc = priv;
1400
struct ath_rate_priv *ath_rc_priv = priv_sta;
1401
const struct ath_rate_table *rate_table;
1402
bool is_cw40, is_sgi = false;
1405
for (i = 0; i < sband->n_bitrates; i++) {
1406
if (sta->supp_rates[sband->band] & BIT(i)) {
1407
ath_rc_priv->neg_rates.rs_rates[j]
1408
= (sband->bitrates[i].bitrate * 2) / 10;
1412
ath_rc_priv->neg_rates.rs_nrates = j;
1414
if (sta->ht_cap.ht_supported) {
1415
for (i = 0, j = 0; i < 77; i++) {
1416
if (sta->ht_cap.mcs.rx_mask[i/8] & (1<<(i%8)))
1417
ath_rc_priv->neg_ht_rates.rs_rates[j++] = i;
1418
if (j == ATH_RATE_MAX)
1421
ath_rc_priv->neg_ht_rates.rs_nrates = j;
1424
is_cw40 = !!(sta->ht_cap.cap & IEEE80211_HT_CAP_SUP_WIDTH_20_40);
1427
is_sgi = !!(sta->ht_cap.cap & IEEE80211_HT_CAP_SGI_40);
1428
else if (sc->sc_ah->caps.hw_caps & ATH9K_HW_CAP_SGI_20)
1429
is_sgi = !!(sta->ht_cap.cap & IEEE80211_HT_CAP_SGI_20);
1431
/* Choose rate table first */
1433
rate_table = ath_choose_rate_table(sc, sband->band,
1434
sta->ht_cap.ht_supported);
1436
ath_rc_priv->ht_cap = ath_rc_build_ht_caps(sc, sta, is_cw40, is_sgi);
1437
ath_rc_init(sc, priv_sta, sband, sta, rate_table);
1440
static void ath_rate_update(void *priv, struct ieee80211_supported_band *sband,
1441
struct ieee80211_sta *sta, void *priv_sta,
1442
u32 changed, enum nl80211_channel_type oper_chan_type)
1444
struct ath_softc *sc = priv;
1445
struct ath_rate_priv *ath_rc_priv = priv_sta;
1446
const struct ath_rate_table *rate_table = NULL;
1447
bool oper_cw40 = false, oper_sgi;
1448
bool local_cw40 = !!(ath_rc_priv->ht_cap & WLAN_RC_40_FLAG);
1449
bool local_sgi = !!(ath_rc_priv->ht_cap & WLAN_RC_SGI_FLAG);
1451
/* FIXME: Handle AP mode later when we support CWM */
1453
if (changed & IEEE80211_RC_HT_CHANGED) {
1454
if (sc->sc_ah->opmode != NL80211_IFTYPE_STATION)
1457
if (oper_chan_type == NL80211_CHAN_HT40MINUS ||
1458
oper_chan_type == NL80211_CHAN_HT40PLUS)
1462
oper_sgi = (sta->ht_cap.cap & IEEE80211_HT_CAP_SGI_40) ?
1464
else if (sc->sc_ah->caps.hw_caps & ATH9K_HW_CAP_SGI_20)
1465
oper_sgi = (sta->ht_cap.cap & IEEE80211_HT_CAP_SGI_20) ?
1470
if ((local_cw40 != oper_cw40) || (local_sgi != oper_sgi)) {
1471
rate_table = ath_choose_rate_table(sc, sband->band,
1472
sta->ht_cap.ht_supported);
1473
ath_rc_priv->ht_cap = ath_rc_build_ht_caps(sc, sta,
1474
oper_cw40, oper_sgi);
1475
ath_rc_init(sc, priv_sta, sband, sta, rate_table);
1477
ath_dbg(ath9k_hw_common(sc->sc_ah), ATH_DBG_CONFIG,
1478
"Operating HT Bandwidth changed to: %d\n",
1479
sc->hw->conf.channel_type);
1484
#ifdef CONFIG_ATH9K_DEBUGFS
1486
static int ath9k_debugfs_open(struct inode *inode, struct file *file)
1488
file->private_data = inode->i_private;
1492
static ssize_t read_file_rcstat(struct file *file, char __user *user_buf,
1493
size_t count, loff_t *ppos)
1495
struct ath_rate_priv *rc = file->private_data;
1497
unsigned int len = 0, max;
1501
if (rc->rate_table == NULL)
1504
max = 80 + rc->rate_table_size * 1024 + 1;
1505
buf = kmalloc(max, GFP_KERNEL);
1509
len += sprintf(buf, "%6s %6s %6s "
1510
"%10s %10s %10s %10s\n",
1511
"HT", "MCS", "Rate",
1512
"Success", "Retries", "XRetries", "PER");
1514
for (i = 0; i < rc->rate_table_size; i++) {
1515
u32 ratekbps = rc->rate_table->info[i].ratekbps;
1516
struct ath_rc_stats *stats = &rc->rcstats[i];
1519
int used_mcs = 0, used_htmode = 0;
1521
if (WLAN_RC_PHY_HT(rc->rate_table->info[i].phy)) {
1522
used_mcs = snprintf(mcs, 5, "%d",
1523
rc->rate_table->info[i].ratecode);
1525
if (WLAN_RC_PHY_40(rc->rate_table->info[i].phy))
1526
used_htmode = snprintf(htmode, 5, "HT40");
1527
else if (WLAN_RC_PHY_20(rc->rate_table->info[i].phy))
1528
used_htmode = snprintf(htmode, 5, "HT20");
1530
used_htmode = snprintf(htmode, 5, "????");
1533
mcs[used_mcs] = '\0';
1534
htmode[used_htmode] = '\0';
1536
len += snprintf(buf + len, max - len,
1538
"%10u %10u %10u %10u\n",
1542
(ratekbps % 1000) / 100,
1552
retval = simple_read_from_buffer(user_buf, count, ppos, buf, len);
1557
static const struct file_operations fops_rcstat = {
1558
.read = read_file_rcstat,
1559
.open = ath9k_debugfs_open,
1560
.owner = THIS_MODULE
1563
static void ath_rate_add_sta_debugfs(void *priv, void *priv_sta,
1566
struct ath_rate_priv *rc = priv_sta;
1567
debugfs_create_file("rc_stats", S_IRUGO, dir, rc, &fops_rcstat);
1570
#endif /* CONFIG_ATH9K_DEBUGFS */
1572
static void *ath_rate_alloc(struct ieee80211_hw *hw, struct dentry *debugfsdir)
1577
static void ath_rate_free(void *priv)
1582
static void *ath_rate_alloc_sta(void *priv, struct ieee80211_sta *sta, gfp_t gfp)
1584
struct ath_softc *sc = priv;
1585
struct ath_rate_priv *rate_priv;
1587
rate_priv = kzalloc(sizeof(struct ath_rate_priv), gfp);
1589
ath_err(ath9k_hw_common(sc->sc_ah),
1590
"Unable to allocate private rc structure\n");
1597
static void ath_rate_free_sta(void *priv, struct ieee80211_sta *sta,
1600
struct ath_rate_priv *rate_priv = priv_sta;
1604
static struct rate_control_ops ath_rate_ops = {
1606
.name = "ath9k_rate_control",
1607
.tx_status = ath_tx_status,
1608
.get_rate = ath_get_rate,
1609
.rate_init = ath_rate_init,
1610
.rate_update = ath_rate_update,
1611
.alloc = ath_rate_alloc,
1612
.free = ath_rate_free,
1613
.alloc_sta = ath_rate_alloc_sta,
1614
.free_sta = ath_rate_free_sta,
1615
#ifdef CONFIG_ATH9K_DEBUGFS
1616
.add_sta_debugfs = ath_rate_add_sta_debugfs,
1620
int ath_rate_control_register(void)
1622
return ieee80211_rate_control_register(&ath_rate_ops);
1625
void ath_rate_control_unregister(void)
1627
ieee80211_rate_control_unregister(&ath_rate_ops);