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(struct ath_rate_priv
*ath_rc_priv
)
410 const struct ath_rate_table
*rate_table
= ath_rc_priv
->rate_table
;
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
;
428 int ath_rc_get_nextvalid_txrate(const struct ath_rate_table
*rate_table
,
429 struct ath_rate_priv
*ath_rc_priv
,
435 for (i
= 0; i
< ath_rc_priv
->max_valid_rate
- 1; i
++) {
436 if (ath_rc_priv
->valid_rate_index
[i
] == cur_valid_txrate
) {
437 *next_idx
= ath_rc_priv
->valid_rate_index
[i
+1];
442 /* No more valid rates */
448 /* Return true only for single stream */
450 static int ath_rc_valid_phyrate(u32 phy
, u32 capflag
, int ignore_cw
)
452 if (WLAN_RC_PHY_HT(phy
) && !(capflag
& WLAN_RC_HT_FLAG
))
454 if (WLAN_RC_PHY_DS(phy
) && !(capflag
& WLAN_RC_DS_FLAG
))
456 if (WLAN_RC_PHY_TS(phy
) && !(capflag
& WLAN_RC_TS_FLAG
))
458 if (WLAN_RC_PHY_SGI(phy
) && !(capflag
& WLAN_RC_SGI_FLAG
))
460 if (!ignore_cw
&& WLAN_RC_PHY_HT(phy
))
461 if (WLAN_RC_PHY_40(phy
) && !(capflag
& WLAN_RC_40_FLAG
))
467 ath_rc_get_lower_rix(struct ath_rate_priv
*ath_rc_priv
,
468 u8 cur_valid_txrate
, u8
*next_idx
)
472 for (i
= 1; i
< ath_rc_priv
->max_valid_rate
; i
++) {
473 if (ath_rc_priv
->valid_rate_index
[i
] == cur_valid_txrate
) {
474 *next_idx
= ath_rc_priv
->valid_rate_index
[i
-1];
482 static u8
ath_rc_init_validrates(struct ath_rate_priv
*ath_rc_priv
)
484 const struct ath_rate_table
*rate_table
= ath_rc_priv
->rate_table
;
487 for (i
= 0; i
< rate_table
->rate_cnt
; i
++) {
488 if (rate_table
->info
[i
].rate_flags
& RC_LEGACY
) {
489 u32 phy
= rate_table
->info
[i
].phy
;
490 u8 valid_rate_count
= 0;
492 if (!ath_rc_valid_phyrate(phy
, ath_rc_priv
->ht_cap
, 0))
495 valid_rate_count
= ath_rc_priv
->valid_phy_ratecnt
[phy
];
497 ath_rc_priv
->valid_phy_rateidx
[phy
][valid_rate_count
] = i
;
498 ath_rc_priv
->valid_phy_ratecnt
[phy
] += 1;
499 ath_rc_priv
->valid_rate_index
[i
] = true;
507 static u8
ath_rc_setvalid_rates(struct ath_rate_priv
*ath_rc_priv
)
509 const struct ath_rate_table
*rate_table
= ath_rc_priv
->rate_table
;
510 struct ath_rateset
*rateset
= &ath_rc_priv
->neg_rates
;
511 u32 phy
, capflag
= ath_rc_priv
->ht_cap
;
513 u8 i
, j
, hi
= 0, rate
, dot11rate
, valid_rate_count
;
515 for (i
= 0; i
< rateset
->rs_nrates
; i
++) {
516 for (j
= 0; j
< rate_table
->rate_cnt
; j
++) {
517 phy
= rate_table
->info
[j
].phy
;
518 rate_flags
= rate_table
->info
[j
].rate_flags
;
519 rate
= rateset
->rs_rates
[i
];
520 dot11rate
= rate_table
->info
[j
].dot11rate
;
522 if (rate
!= dot11rate
523 || ((rate_flags
& WLAN_RC_CAP_MODE(capflag
)) !=
524 WLAN_RC_CAP_MODE(capflag
))
525 || !(rate_flags
& WLAN_RC_CAP_STREAM(capflag
))
526 || WLAN_RC_PHY_HT(phy
))
529 if (!ath_rc_valid_phyrate(phy
, capflag
, 0))
532 valid_rate_count
= ath_rc_priv
->valid_phy_ratecnt
[phy
];
533 ath_rc_priv
->valid_phy_rateidx
[phy
][valid_rate_count
] = j
;
534 ath_rc_priv
->valid_phy_ratecnt
[phy
] += 1;
535 ath_rc_priv
->valid_rate_index
[j
] = true;
543 static u8
ath_rc_setvalid_htrates(struct ath_rate_priv
*ath_rc_priv
)
545 const struct ath_rate_table
*rate_table
= ath_rc_priv
->rate_table
;
546 struct ath_rateset
*rateset
= &ath_rc_priv
->neg_ht_rates
;
547 u32 phy
, capflag
= ath_rc_priv
->ht_cap
;
549 u8 i
, j
, hi
= 0, rate
, dot11rate
, valid_rate_count
;
551 for (i
= 0; i
< rateset
->rs_nrates
; i
++) {
552 for (j
= 0; j
< rate_table
->rate_cnt
; j
++) {
553 phy
= rate_table
->info
[j
].phy
;
554 rate_flags
= rate_table
->info
[j
].rate_flags
;
555 rate
= rateset
->rs_rates
[i
];
556 dot11rate
= rate_table
->info
[j
].dot11rate
;
558 if ((rate
!= dot11rate
) || !WLAN_RC_PHY_HT(phy
) ||
559 !(rate_flags
& WLAN_RC_CAP_STREAM(capflag
)) ||
560 !WLAN_RC_PHY_HT_VALID(rate_flags
, capflag
))
563 if (!ath_rc_valid_phyrate(phy
, capflag
, 0))
566 valid_rate_count
= ath_rc_priv
->valid_phy_ratecnt
[phy
];
567 ath_rc_priv
->valid_phy_rateidx
[phy
][valid_rate_count
] = j
;
568 ath_rc_priv
->valid_phy_ratecnt
[phy
] += 1;
569 ath_rc_priv
->valid_rate_index
[j
] = true;
577 static u8
ath_rc_get_highest_rix(struct ath_rate_priv
*ath_rc_priv
,
580 const struct ath_rate_table
*rate_table
= ath_rc_priv
->rate_table
;
581 u32 best_thruput
, this_thruput
, now_msec
;
582 u8 rate
, next_rate
, best_rate
, maxindex
, minindex
;
585 now_msec
= jiffies_to_msecs(jiffies
);
588 maxindex
= ath_rc_priv
->max_valid_rate
-1;
590 best_rate
= minindex
;
593 * Try the higher rate first. It will reduce memory moving time
594 * if we have very good channel characteristics.
596 for (index
= maxindex
; index
>= minindex
; index
--) {
599 rate
= ath_rc_priv
->valid_rate_index
[index
];
600 if (rate
> ath_rc_priv
->rate_max_phy
)
604 * For TCP the average collision rate is around 11%,
605 * so we ignore PERs less than this. This is to
606 * prevent the rate we are currently using (whose
607 * PER might be in the 10-15 range because of TCP
608 * collisions) looking worse than the next lower
609 * rate whose PER has decayed close to 0. If we
610 * used to next lower rate, its PER would grow to
611 * 10-15 and we would be worse off then staying
612 * at the current rate.
614 per_thres
= ath_rc_priv
->per
[rate
];
618 this_thruput
= rate_table
->info
[rate
].user_ratekbps
*
621 if (best_thruput
<= this_thruput
) {
622 best_thruput
= this_thruput
;
630 * Must check the actual rate (ratekbps) to account for
631 * non-monoticity of 11g's rate table
634 if (rate
>= ath_rc_priv
->rate_max_phy
) {
635 rate
= ath_rc_priv
->rate_max_phy
;
637 /* Probe the next allowed phy state */
638 if (ath_rc_get_nextvalid_txrate(rate_table
,
639 ath_rc_priv
, rate
, &next_rate
) &&
640 (now_msec
- ath_rc_priv
->probe_time
>
641 rate_table
->probe_interval
) &&
642 (ath_rc_priv
->hw_maxretry_pktcnt
>= 1)) {
644 ath_rc_priv
->probe_rate
= rate
;
645 ath_rc_priv
->probe_time
= now_msec
;
646 ath_rc_priv
->hw_maxretry_pktcnt
= 0;
651 if (rate
> (ath_rc_priv
->rate_table_size
- 1))
652 rate
= ath_rc_priv
->rate_table_size
- 1;
654 if (RC_TS_ONLY(rate_table
->info
[rate
].rate_flags
) &&
655 (ath_rc_priv
->ht_cap
& WLAN_RC_TS_FLAG
))
658 if (RC_DS_OR_LATER(rate_table
->info
[rate
].rate_flags
) &&
659 (ath_rc_priv
->ht_cap
& (WLAN_RC_DS_FLAG
| WLAN_RC_TS_FLAG
)))
662 if (RC_SS_OR_LEGACY(rate_table
->info
[rate
].rate_flags
))
665 /* This should not happen */
668 rate
= ath_rc_priv
->valid_rate_index
[0];
673 static void ath_rc_rate_set_series(const struct ath_rate_table
*rate_table
,
674 struct ieee80211_tx_rate
*rate
,
675 struct ieee80211_tx_rate_control
*txrc
,
676 u8 tries
, u8 rix
, int rtsctsenable
)
679 rate
->idx
= rate_table
->info
[rix
].ratecode
;
681 if (txrc
->short_preamble
)
682 rate
->flags
|= IEEE80211_TX_RC_USE_SHORT_PREAMBLE
;
683 if (txrc
->rts
|| rtsctsenable
)
684 rate
->flags
|= IEEE80211_TX_RC_USE_RTS_CTS
;
686 if (WLAN_RC_PHY_HT(rate_table
->info
[rix
].phy
)) {
687 rate
->flags
|= IEEE80211_TX_RC_MCS
;
688 if (WLAN_RC_PHY_40(rate_table
->info
[rix
].phy
) &&
689 conf_is_ht40(&txrc
->hw
->conf
))
690 rate
->flags
|= IEEE80211_TX_RC_40_MHZ_WIDTH
;
691 if (WLAN_RC_PHY_SGI(rate_table
->info
[rix
].phy
))
692 rate
->flags
|= IEEE80211_TX_RC_SHORT_GI
;
696 static void ath_rc_rate_set_rtscts(struct ath_softc
*sc
,
697 const struct ath_rate_table
*rate_table
,
698 struct ieee80211_tx_info
*tx_info
)
700 struct ieee80211_tx_rate
*rates
= tx_info
->control
.rates
;
701 int i
= 0, rix
= 0, cix
, enable_g_protection
= 0;
703 /* get the cix for the lowest valid rix */
704 for (i
= 3; i
>= 0; i
--) {
705 if (rates
[i
].count
&& (rates
[i
].idx
>= 0)) {
706 rix
= ath_rc_get_rateindex(rate_table
, &rates
[i
]);
710 cix
= rate_table
->info
[rix
].ctrl_rate
;
712 /* All protection frames are transmited at 2Mb/s for 802.11g,
713 * otherwise we transmit them at 1Mb/s */
714 if (sc
->hw
->conf
.channel
->band
== IEEE80211_BAND_2GHZ
&&
715 !conf_is_ht(&sc
->hw
->conf
))
716 enable_g_protection
= 1;
719 * If 802.11g protection is enabled, determine whether to use RTS/CTS or
720 * just CTS. Note that this is only done for OFDM/HT unicast frames.
722 if ((tx_info
->control
.vif
&&
723 tx_info
->control
.vif
->bss_conf
.use_cts_prot
) &&
724 (rate_table
->info
[rix
].phy
== WLAN_RC_PHY_OFDM
||
725 WLAN_RC_PHY_HT(rate_table
->info
[rix
].phy
))) {
726 rates
[0].flags
|= IEEE80211_TX_RC_USE_CTS_PROTECT
;
727 cix
= rate_table
->info
[enable_g_protection
].ctrl_rate
;
730 tx_info
->control
.rts_cts_rate_idx
= cix
;
733 static void ath_get_rate(void *priv
, struct ieee80211_sta
*sta
, void *priv_sta
,
734 struct ieee80211_tx_rate_control
*txrc
)
736 struct ath_softc
*sc
= priv
;
737 struct ath_rate_priv
*ath_rc_priv
= priv_sta
;
738 const struct ath_rate_table
*rate_table
;
739 struct sk_buff
*skb
= txrc
->skb
;
740 struct ieee80211_tx_info
*tx_info
= IEEE80211_SKB_CB(skb
);
741 struct ieee80211_tx_rate
*rates
= tx_info
->control
.rates
;
742 struct ieee80211_hdr
*hdr
= (struct ieee80211_hdr
*)skb
->data
;
743 __le16 fc
= hdr
->frame_control
;
744 u8 try_per_rate
, i
= 0, rix
;
747 if (rate_control_send_low(sta
, priv_sta
, txrc
))
751 * For Multi Rate Retry we use a different number of
752 * retry attempt counts. This ends up looking like this:
762 rate_table
= ath_rc_priv
->rate_table
;
763 rix
= ath_rc_get_highest_rix(ath_rc_priv
, &is_probe
);
765 if (conf_is_ht(&sc
->hw
->conf
) &&
766 (sta
->ht_cap
.cap
& IEEE80211_HT_CAP_LDPC_CODING
))
767 tx_info
->flags
|= IEEE80211_TX_CTL_LDPC
;
769 if (conf_is_ht(&sc
->hw
->conf
) &&
770 (sta
->ht_cap
.cap
& IEEE80211_HT_CAP_TX_STBC
))
771 tx_info
->flags
|= (1 << IEEE80211_TX_CTL_STBC_SHIFT
);
775 * Set one try for probe rates. For the
776 * probes don't enable RTS.
778 ath_rc_rate_set_series(rate_table
, &rates
[i
++], txrc
,
781 * Get the next tried/allowed rate.
782 * No RTS for the next series after the probe rate.
784 ath_rc_get_lower_rix(ath_rc_priv
, rix
, &rix
);
785 ath_rc_rate_set_series(rate_table
, &rates
[i
++], txrc
,
786 try_per_rate
, rix
, 0);
788 tx_info
->flags
|= IEEE80211_TX_CTL_RATE_CTRL_PROBE
;
791 * Set the chosen rate. No RTS for first series entry.
793 ath_rc_rate_set_series(rate_table
, &rates
[i
++], txrc
,
794 try_per_rate
, rix
, 0);
797 for ( ; i
< 4; i
++) {
799 * Use twice the number of tries for the last MRR segment.
804 ath_rc_get_lower_rix(ath_rc_priv
, rix
, &rix
);
807 * All other rates in the series have RTS enabled.
809 ath_rc_rate_set_series(rate_table
, &rates
[i
], txrc
,
810 try_per_rate
, rix
, 1);
814 * NB:Change rate series to enable aggregation when operating
815 * at lower MCS rates. When first rate in series is MCS2
816 * in HT40 @ 2.4GHz, series should look like:
818 * {MCS2, MCS1, MCS0, MCS0}.
820 * When first rate in series is MCS3 in HT20 @ 2.4GHz, series should
823 * {MCS3, MCS2, MCS1, MCS1}
825 * So, set fourth rate in series to be same as third one for
828 if ((sc
->hw
->conf
.channel
->band
== IEEE80211_BAND_2GHZ
) &&
829 (conf_is_ht(&sc
->hw
->conf
))) {
830 u8 dot11rate
= rate_table
->info
[rix
].dot11rate
;
831 u8 phy
= rate_table
->info
[rix
].phy
;
833 ((dot11rate
== 2 && phy
== WLAN_RC_PHY_HT_40_SS
) ||
834 (dot11rate
== 3 && phy
== WLAN_RC_PHY_HT_20_SS
))) {
835 rates
[3].idx
= rates
[2].idx
;
836 rates
[3].flags
= rates
[2].flags
;
841 * Force hardware to use computed duration for next
842 * fragment by disabling multi-rate retry, which
843 * updates duration based on the multi-rate duration table.
845 * FIXME: Fix duration
847 if (ieee80211_has_morefrags(fc
) ||
848 (le16_to_cpu(hdr
->seq_ctrl
) & IEEE80211_SCTL_FRAG
)) {
849 rates
[1].count
= rates
[2].count
= rates
[3].count
= 0;
850 rates
[1].idx
= rates
[2].idx
= rates
[3].idx
= 0;
851 rates
[0].count
= ATH_TXMAXTRY
;
855 ath_rc_rate_set_rtscts(sc
, rate_table
, tx_info
);
858 static void ath_rc_update_per(struct ath_softc
*sc
,
859 const struct ath_rate_table
*rate_table
,
860 struct ath_rate_priv
*ath_rc_priv
,
861 struct ieee80211_tx_info
*tx_info
,
862 int tx_rate
, int xretries
, int retries
,
865 int count
, n_bad_frames
;
867 static const u32 nretry_to_per_lookup
[10] = {
880 last_per
= ath_rc_priv
->per
[tx_rate
];
881 n_bad_frames
= tx_info
->status
.ampdu_len
- tx_info
->status
.ampdu_ack_len
;
885 ath_rc_priv
->per
[tx_rate
] += 30;
886 if (ath_rc_priv
->per
[tx_rate
] > 100)
887 ath_rc_priv
->per
[tx_rate
] = 100;
890 count
= ARRAY_SIZE(nretry_to_per_lookup
);
891 if (retries
>= count
)
894 /* new_PER = 7/8*old_PER + 1/8*(currentPER) */
895 ath_rc_priv
->per
[tx_rate
] =
896 (u8
)(last_per
- (last_per
>> 3) + (100 >> 3));
899 /* xretries == 1 or 2 */
901 if (ath_rc_priv
->probe_rate
== tx_rate
)
902 ath_rc_priv
->probe_rate
= 0;
904 } else { /* xretries == 0 */
905 count
= ARRAY_SIZE(nretry_to_per_lookup
);
906 if (retries
>= count
)
910 /* new_PER = 7/8*old_PER + 1/8*(currentPER)
911 * Assuming that n_frames is not 0. The current PER
912 * from the retries is 100 * retries / (retries+1),
913 * since the first retries attempts failed, and the
914 * next one worked. For the one that worked,
915 * n_bad_frames subframes out of n_frames wored,
916 * so the PER for that part is
917 * 100 * n_bad_frames / n_frames, and it contributes
918 * 100 * n_bad_frames / (n_frames * (retries+1)) to
919 * the above PER. The expression below is a
920 * simplified version of the sum of these two terms.
922 if (tx_info
->status
.ampdu_len
> 0) {
923 int n_frames
, n_bad_tries
;
926 n_bad_tries
= retries
* tx_info
->status
.ampdu_len
+
928 n_frames
= tx_info
->status
.ampdu_len
* (retries
+ 1);
929 cur_per
= (100 * n_bad_tries
/ n_frames
) >> 3;
930 new_per
= (u8
)(last_per
- (last_per
>> 3) + cur_per
);
931 ath_rc_priv
->per
[tx_rate
] = new_per
;
934 ath_rc_priv
->per
[tx_rate
] =
935 (u8
)(last_per
- (last_per
>> 3) +
936 (nretry_to_per_lookup
[retries
] >> 3));
941 * If we got at most one retry then increase the max rate if
942 * this was a probe. Otherwise, ignore the probe.
944 if (ath_rc_priv
->probe_rate
&& ath_rc_priv
->probe_rate
== tx_rate
) {
945 if (retries
> 0 || 2 * n_bad_frames
> tx_info
->status
.ampdu_len
) {
947 * Since we probed with just a single attempt,
948 * any retries means the probe failed. Also,
949 * if the attempt worked, but more than half
950 * the subframes were bad then also consider
951 * the probe a failure.
953 ath_rc_priv
->probe_rate
= 0;
957 ath_rc_priv
->rate_max_phy
=
958 ath_rc_priv
->probe_rate
;
959 probe_rate
= ath_rc_priv
->probe_rate
;
961 if (ath_rc_priv
->per
[probe_rate
] > 30)
962 ath_rc_priv
->per
[probe_rate
] = 20;
964 ath_rc_priv
->probe_rate
= 0;
967 * Since this probe succeeded, we allow the next
968 * probe twice as soon. This allows the maxRate
969 * to move up faster if the probes are
972 ath_rc_priv
->probe_time
=
973 now_msec
- rate_table
->probe_interval
/ 2;
979 * Don't update anything. We don't know if
980 * this was because of collisions or poor signal.
982 ath_rc_priv
->hw_maxretry_pktcnt
= 0;
985 * It worked with no retries. First ignore bogus (small)
988 if (tx_rate
== ath_rc_priv
->rate_max_phy
&&
989 ath_rc_priv
->hw_maxretry_pktcnt
< 255) {
990 ath_rc_priv
->hw_maxretry_pktcnt
++;
997 static void ath_debug_stat_retries(struct ath_rate_priv
*rc
, int rix
,
998 int xretries
, int retries
, u8 per
)
1000 struct ath_rc_stats
*stats
= &rc
->rcstats
[rix
];
1002 stats
->xretries
+= xretries
;
1003 stats
->retries
+= retries
;
1007 /* Update PER, RSSI and whatever else that the code thinks it is doing.
1008 If you can make sense of all this, you really need to go out more. */
1010 static void ath_rc_update_ht(struct ath_softc
*sc
,
1011 struct ath_rate_priv
*ath_rc_priv
,
1012 struct ieee80211_tx_info
*tx_info
,
1013 int tx_rate
, int xretries
, int retries
)
1015 u32 now_msec
= jiffies_to_msecs(jiffies
);
1018 const struct ath_rate_table
*rate_table
= ath_rc_priv
->rate_table
;
1019 int size
= ath_rc_priv
->rate_table_size
;
1021 if ((tx_rate
< 0) || (tx_rate
> rate_table
->rate_cnt
))
1024 last_per
= ath_rc_priv
->per
[tx_rate
];
1026 /* Update PER first */
1027 ath_rc_update_per(sc
, rate_table
, ath_rc_priv
,
1028 tx_info
, tx_rate
, xretries
,
1032 * If this rate looks bad (high PER) then stop using it for
1033 * a while (except if we are probing).
1035 if (ath_rc_priv
->per
[tx_rate
] >= 55 && tx_rate
> 0 &&
1036 rate_table
->info
[tx_rate
].ratekbps
<=
1037 rate_table
->info
[ath_rc_priv
->rate_max_phy
].ratekbps
) {
1038 ath_rc_get_lower_rix(ath_rc_priv
, (u8
)tx_rate
,
1039 &ath_rc_priv
->rate_max_phy
);
1041 /* Don't probe for a little while. */
1042 ath_rc_priv
->probe_time
= now_msec
;
1045 /* Make sure the rates below this have lower PER */
1046 /* Monotonicity is kept only for rates below the current rate. */
1047 if (ath_rc_priv
->per
[tx_rate
] < last_per
) {
1048 for (rate
= tx_rate
- 1; rate
>= 0; rate
--) {
1050 if (ath_rc_priv
->per
[rate
] >
1051 ath_rc_priv
->per
[rate
+1]) {
1052 ath_rc_priv
->per
[rate
] =
1053 ath_rc_priv
->per
[rate
+1];
1058 /* Maintain monotonicity for rates above the current rate */
1059 for (rate
= tx_rate
; rate
< size
- 1; rate
++) {
1060 if (ath_rc_priv
->per
[rate
+1] <
1061 ath_rc_priv
->per
[rate
])
1062 ath_rc_priv
->per
[rate
+1] =
1063 ath_rc_priv
->per
[rate
];
1066 /* Every so often, we reduce the thresholds
1067 * and PER (different for CCK and OFDM). */
1068 if (now_msec
- ath_rc_priv
->per_down_time
>=
1069 rate_table
->probe_interval
) {
1070 for (rate
= 0; rate
< size
; rate
++) {
1071 ath_rc_priv
->per
[rate
] =
1072 7 * ath_rc_priv
->per
[rate
] / 8;
1075 ath_rc_priv
->per_down_time
= now_msec
;
1078 ath_debug_stat_retries(ath_rc_priv
, tx_rate
, xretries
, retries
,
1079 ath_rc_priv
->per
[tx_rate
]);
1084 static void ath_rc_tx_status(struct ath_softc
*sc
,
1085 struct ath_rate_priv
*ath_rc_priv
,
1086 struct ieee80211_tx_info
*tx_info
,
1087 int final_ts_idx
, int xretries
, int long_retry
)
1089 const struct ath_rate_table
*rate_table
;
1090 struct ieee80211_tx_rate
*rates
= tx_info
->status
.rates
;
1094 rate_table
= ath_rc_priv
->rate_table
;
1097 * If the first rate is not the final index, there
1098 * are intermediate rate failures to be processed.
1100 if (final_ts_idx
!= 0) {
1101 /* Process intermediate rates that failed.*/
1102 for (i
= 0; i
< final_ts_idx
; i
++) {
1103 if (rates
[i
].count
!= 0 && (rates
[i
].idx
>= 0)) {
1104 flags
= rates
[i
].flags
;
1106 /* If HT40 and we have switched mode from
1107 * 40 to 20 => don't update */
1109 if ((flags
& IEEE80211_TX_RC_40_MHZ_WIDTH
) &&
1110 !(ath_rc_priv
->ht_cap
& WLAN_RC_40_FLAG
))
1113 rix
= ath_rc_get_rateindex(rate_table
, &rates
[i
]);
1114 ath_rc_update_ht(sc
, ath_rc_priv
, tx_info
,
1115 rix
, xretries
? 1 : 2,
1121 * Handle the special case of MIMO PS burst, where the second
1122 * aggregate is sent out with only one rate and one try.
1123 * Treating it as an excessive retry penalizes the rate
1126 if (rates
[0].count
== 1 && xretries
== 1)
1130 flags
= rates
[i
].flags
;
1132 /* If HT40 and we have switched mode from 40 to 20 => don't update */
1133 if ((flags
& IEEE80211_TX_RC_40_MHZ_WIDTH
) &&
1134 !(ath_rc_priv
->ht_cap
& WLAN_RC_40_FLAG
))
1137 rix
= ath_rc_get_rateindex(rate_table
, &rates
[i
]);
1138 ath_rc_update_ht(sc
, ath_rc_priv
, tx_info
, rix
, xretries
, long_retry
);
1142 struct ath_rate_table
*ath_choose_rate_table(struct ath_softc
*sc
,
1143 enum ieee80211_band band
,
1147 case IEEE80211_BAND_2GHZ
:
1149 return &ar5416_11ng_ratetable
;
1150 return &ar5416_11g_ratetable
;
1151 case IEEE80211_BAND_5GHZ
:
1153 return &ar5416_11na_ratetable
;
1154 return &ar5416_11a_ratetable
;
1160 static void ath_rc_init(struct ath_softc
*sc
,
1161 struct ath_rate_priv
*ath_rc_priv
)
1163 const struct ath_rate_table
*rate_table
= ath_rc_priv
->rate_table
;
1164 struct ath_rateset
*rateset
= &ath_rc_priv
->neg_rates
;
1165 struct ath_common
*common
= ath9k_hw_common(sc
->sc_ah
);
1166 u8 i
, j
, k
, hi
= 0, hthi
= 0;
1168 ath_rc_priv
->rate_table_size
= RATE_TABLE_SIZE
;
1170 for (i
= 0 ; i
< ath_rc_priv
->rate_table_size
; i
++) {
1171 ath_rc_priv
->per
[i
] = 0;
1172 ath_rc_priv
->valid_rate_index
[i
] = 0;
1175 for (i
= 0; i
< WLAN_RC_PHY_MAX
; i
++) {
1176 for (j
= 0; j
< RATE_TABLE_SIZE
; j
++)
1177 ath_rc_priv
->valid_phy_rateidx
[i
][j
] = 0;
1178 ath_rc_priv
->valid_phy_ratecnt
[i
] = 0;
1181 if (!rateset
->rs_nrates
) {
1182 hi
= ath_rc_init_validrates(ath_rc_priv
);
1184 hi
= ath_rc_setvalid_rates(ath_rc_priv
);
1186 if (ath_rc_priv
->ht_cap
& WLAN_RC_HT_FLAG
)
1187 hthi
= ath_rc_setvalid_htrates(ath_rc_priv
);
1192 ath_rc_priv
->rate_table_size
= hi
+ 1;
1193 ath_rc_priv
->rate_max_phy
= 0;
1194 WARN_ON(ath_rc_priv
->rate_table_size
> RATE_TABLE_SIZE
);
1196 for (i
= 0, k
= 0; i
< WLAN_RC_PHY_MAX
; i
++) {
1197 for (j
= 0; j
< ath_rc_priv
->valid_phy_ratecnt
[i
]; j
++) {
1198 ath_rc_priv
->valid_rate_index
[k
++] =
1199 ath_rc_priv
->valid_phy_rateidx
[i
][j
];
1202 if (!ath_rc_valid_phyrate(i
, rate_table
->initial_ratemax
, 1) ||
1203 !ath_rc_priv
->valid_phy_ratecnt
[i
])
1206 ath_rc_priv
->rate_max_phy
= ath_rc_priv
->valid_phy_rateidx
[i
][j
-1];
1208 WARN_ON(ath_rc_priv
->rate_table_size
> RATE_TABLE_SIZE
);
1209 WARN_ON(k
> RATE_TABLE_SIZE
);
1211 ath_rc_priv
->max_valid_rate
= k
;
1212 ath_rc_sort_validrates(ath_rc_priv
);
1213 ath_rc_priv
->rate_max_phy
= (k
> 4) ?
1214 ath_rc_priv
->valid_rate_index
[k
-4] :
1215 ath_rc_priv
->valid_rate_index
[k
-1];
1217 ath_dbg(common
, CONFIG
, "RC Initialized with capabilities: 0x%x\n",
1218 ath_rc_priv
->ht_cap
);
1221 static u8
ath_rc_build_ht_caps(struct ath_softc
*sc
, struct ieee80211_sta
*sta
)
1225 if (sta
->ht_cap
.ht_supported
) {
1226 caps
= WLAN_RC_HT_FLAG
;
1227 if (sta
->ht_cap
.mcs
.rx_mask
[1] && sta
->ht_cap
.mcs
.rx_mask
[2])
1228 caps
|= WLAN_RC_TS_FLAG
| WLAN_RC_DS_FLAG
;
1229 else if (sta
->ht_cap
.mcs
.rx_mask
[1])
1230 caps
|= WLAN_RC_DS_FLAG
;
1231 if (sta
->ht_cap
.cap
& IEEE80211_HT_CAP_SUP_WIDTH_20_40
)
1232 caps
|= WLAN_RC_40_FLAG
;
1233 if (sta
->ht_cap
.cap
& IEEE80211_HT_CAP_SGI_40
||
1234 sta
->ht_cap
.cap
& IEEE80211_HT_CAP_SGI_20
)
1235 caps
|= WLAN_RC_SGI_FLAG
;
1241 static bool ath_tx_aggr_check(struct ath_softc
*sc
, struct ieee80211_sta
*sta
,
1244 struct ath_node
*an
= (struct ath_node
*)sta
->drv_priv
;
1245 struct ath_atx_tid
*txtid
;
1247 if (!sta
->ht_cap
.ht_supported
)
1250 txtid
= ATH_AN_2_TID(an
, tidno
);
1252 if (!(txtid
->state
& (AGGR_ADDBA_COMPLETE
| AGGR_ADDBA_PROGRESS
)))
1258 /***********************************/
1259 /* mac80211 Rate Control callbacks */
1260 /***********************************/
1262 static void ath_debug_stat_rc(struct ath_rate_priv
*rc
, int final_rate
)
1264 struct ath_rc_stats
*stats
;
1266 stats
= &rc
->rcstats
[final_rate
];
1271 static void ath_tx_status(void *priv
, struct ieee80211_supported_band
*sband
,
1272 struct ieee80211_sta
*sta
, void *priv_sta
,
1273 struct sk_buff
*skb
)
1275 struct ath_softc
*sc
= priv
;
1276 struct ath_rate_priv
*ath_rc_priv
= priv_sta
;
1277 struct ieee80211_tx_info
*tx_info
= IEEE80211_SKB_CB(skb
);
1278 struct ieee80211_hdr
*hdr
;
1279 int final_ts_idx
= 0, tx_status
= 0;
1284 hdr
= (struct ieee80211_hdr
*)skb
->data
;
1285 fc
= hdr
->frame_control
;
1286 for (i
= 0; i
< sc
->hw
->max_rates
; i
++) {
1287 struct ieee80211_tx_rate
*rate
= &tx_info
->status
.rates
[i
];
1288 if (rate
->idx
< 0 || !rate
->count
)
1292 long_retry
= rate
->count
- 1;
1295 if (!priv_sta
|| !ieee80211_is_data(fc
))
1298 /* This packet was aggregated but doesn't carry status info */
1299 if ((tx_info
->flags
& IEEE80211_TX_CTL_AMPDU
) &&
1300 !(tx_info
->flags
& IEEE80211_TX_STAT_AMPDU
))
1303 if (tx_info
->flags
& IEEE80211_TX_STAT_TX_FILTERED
)
1306 if (!(tx_info
->flags
& IEEE80211_TX_STAT_ACK
))
1309 ath_rc_tx_status(sc
, ath_rc_priv
, tx_info
, final_ts_idx
, tx_status
,
1312 /* Check if aggregation has to be enabled for this tid */
1313 if (conf_is_ht(&sc
->hw
->conf
) &&
1314 !(skb
->protocol
== cpu_to_be16(ETH_P_PAE
))) {
1315 if (ieee80211_is_data_qos(fc
) &&
1316 skb_get_queue_mapping(skb
) != IEEE80211_AC_VO
) {
1319 qc
= ieee80211_get_qos_ctl(hdr
);
1322 if(ath_tx_aggr_check(sc
, sta
, tid
))
1323 ieee80211_start_tx_ba_session(sta
, tid
, 0);
1327 ath_debug_stat_rc(ath_rc_priv
,
1328 ath_rc_get_rateindex(ath_rc_priv
->rate_table
,
1329 &tx_info
->status
.rates
[final_ts_idx
]));
1332 static void ath_rate_init(void *priv
, struct ieee80211_supported_band
*sband
,
1333 struct ieee80211_sta
*sta
, void *priv_sta
)
1335 struct ath_softc
*sc
= priv
;
1336 struct ath_common
*common
= ath9k_hw_common(sc
->sc_ah
);
1337 struct ath_rate_priv
*ath_rc_priv
= priv_sta
;
1340 for (i
= 0; i
< sband
->n_bitrates
; i
++) {
1341 if (sta
->supp_rates
[sband
->band
] & BIT(i
)) {
1342 ath_rc_priv
->neg_rates
.rs_rates
[j
]
1343 = (sband
->bitrates
[i
].bitrate
* 2) / 10;
1347 ath_rc_priv
->neg_rates
.rs_nrates
= j
;
1349 if (sta
->ht_cap
.ht_supported
) {
1350 for (i
= 0, j
= 0; i
< 77; i
++) {
1351 if (sta
->ht_cap
.mcs
.rx_mask
[i
/8] & (1<<(i
%8)))
1352 ath_rc_priv
->neg_ht_rates
.rs_rates
[j
++] = i
;
1353 if (j
== ATH_RATE_MAX
)
1356 ath_rc_priv
->neg_ht_rates
.rs_nrates
= j
;
1359 ath_rc_priv
->rate_table
= ath_choose_rate_table(sc
, sband
->band
,
1360 sta
->ht_cap
.ht_supported
);
1361 if (!ath_rc_priv
->rate_table
) {
1362 ath_err(common
, "No rate table chosen\n");
1366 ath_rc_priv
->ht_cap
= ath_rc_build_ht_caps(sc
, sta
);
1367 ath_rc_init(sc
, priv_sta
);
1370 static void ath_rate_update(void *priv
, struct ieee80211_supported_band
*sband
,
1371 struct ieee80211_sta
*sta
, void *priv_sta
,
1374 struct ath_softc
*sc
= priv
;
1375 struct ath_rate_priv
*ath_rc_priv
= priv_sta
;
1377 if (changed
& IEEE80211_RC_BW_CHANGED
) {
1378 ath_rc_priv
->ht_cap
= ath_rc_build_ht_caps(sc
, sta
);
1379 ath_rc_init(sc
, priv_sta
);
1381 ath_dbg(ath9k_hw_common(sc
->sc_ah
), CONFIG
,
1382 "Operating HT Bandwidth changed to: %d\n",
1383 sc
->hw
->conf
.channel_type
);
1387 #ifdef CONFIG_ATH9K_DEBUGFS
1389 static ssize_t
read_file_rcstat(struct file
*file
, char __user
*user_buf
,
1390 size_t count
, loff_t
*ppos
)
1392 struct ath_rate_priv
*rc
= file
->private_data
;
1394 unsigned int len
= 0, max
;
1398 if (rc
->rate_table
== NULL
)
1401 max
= 80 + rc
->rate_table_size
* 1024 + 1;
1402 buf
= kmalloc(max
, GFP_KERNEL
);
1406 len
+= sprintf(buf
, "%6s %6s %6s "
1407 "%10s %10s %10s %10s\n",
1408 "HT", "MCS", "Rate",
1409 "Success", "Retries", "XRetries", "PER");
1411 for (i
= 0; i
< rc
->rate_table_size
; i
++) {
1412 u32 ratekbps
= rc
->rate_table
->info
[i
].ratekbps
;
1413 struct ath_rc_stats
*stats
= &rc
->rcstats
[i
];
1416 int used_mcs
= 0, used_htmode
= 0;
1418 if (WLAN_RC_PHY_HT(rc
->rate_table
->info
[i
].phy
)) {
1419 used_mcs
= snprintf(mcs
, 5, "%d",
1420 rc
->rate_table
->info
[i
].ratecode
);
1422 if (WLAN_RC_PHY_40(rc
->rate_table
->info
[i
].phy
))
1423 used_htmode
= snprintf(htmode
, 5, "HT40");
1424 else if (WLAN_RC_PHY_20(rc
->rate_table
->info
[i
].phy
))
1425 used_htmode
= snprintf(htmode
, 5, "HT20");
1427 used_htmode
= snprintf(htmode
, 5, "????");
1430 mcs
[used_mcs
] = '\0';
1431 htmode
[used_htmode
] = '\0';
1433 len
+= snprintf(buf
+ len
, max
- len
,
1435 "%10u %10u %10u %10u\n",
1439 (ratekbps
% 1000) / 100,
1449 retval
= simple_read_from_buffer(user_buf
, count
, ppos
, buf
, len
);
1454 static const struct file_operations fops_rcstat
= {
1455 .read
= read_file_rcstat
,
1456 .open
= simple_open
,
1457 .owner
= THIS_MODULE
1460 static void ath_rate_add_sta_debugfs(void *priv
, void *priv_sta
,
1463 struct ath_rate_priv
*rc
= priv_sta
;
1464 debugfs_create_file("rc_stats", S_IRUGO
, dir
, rc
, &fops_rcstat
);
1467 #endif /* CONFIG_ATH9K_DEBUGFS */
1469 static void *ath_rate_alloc(struct ieee80211_hw
*hw
, struct dentry
*debugfsdir
)
1474 static void ath_rate_free(void *priv
)
1479 static void *ath_rate_alloc_sta(void *priv
, struct ieee80211_sta
*sta
, gfp_t gfp
)
1481 struct ath_softc
*sc
= priv
;
1482 struct ath_rate_priv
*rate_priv
;
1484 rate_priv
= kzalloc(sizeof(struct ath_rate_priv
), gfp
);
1486 ath_err(ath9k_hw_common(sc
->sc_ah
),
1487 "Unable to allocate private rc structure\n");
1494 static void ath_rate_free_sta(void *priv
, struct ieee80211_sta
*sta
,
1497 struct ath_rate_priv
*rate_priv
= priv_sta
;
1501 static struct rate_control_ops ath_rate_ops
= {
1503 .name
= "ath9k_rate_control",
1504 .tx_status
= ath_tx_status
,
1505 .get_rate
= ath_get_rate
,
1506 .rate_init
= ath_rate_init
,
1507 .rate_update
= ath_rate_update
,
1508 .alloc
= ath_rate_alloc
,
1509 .free
= ath_rate_free
,
1510 .alloc_sta
= ath_rate_alloc_sta
,
1511 .free_sta
= ath_rate_free_sta
,
1512 #ifdef CONFIG_ATH9K_DEBUGFS
1513 .add_sta_debugfs
= ath_rate_add_sta_debugfs
,
1517 int ath_rate_control_register(void)
1519 return ieee80211_rate_control_register(&ath_rate_ops
);
1522 void ath_rate_control_unregister(void)
1524 ieee80211_rate_control_unregister(&ath_rate_ops
);