2 * Copyright (c) 2004 Video54 Technologies, Inc.
3 * Copyright (c) 2004-2009 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>
22 static const struct ath_rate_table ar5416_11na_ratetable
= {
26 [0] = { RC_L_SDT
, WLAN_RC_PHY_OFDM
, 6000,
27 5400, 0, 12, 0, 0, 0, 0 }, /* 6 Mb */
28 [1] = { RC_L_SDT
, WLAN_RC_PHY_OFDM
, 9000,
29 7800, 1, 18, 0, 1, 1, 1 }, /* 9 Mb */
30 [2] = { RC_L_SDT
, WLAN_RC_PHY_OFDM
, 12000,
31 10000, 2, 24, 2, 2, 2, 2 }, /* 12 Mb */
32 [3] = { RC_L_SDT
, WLAN_RC_PHY_OFDM
, 18000,
33 13900, 3, 36, 2, 3, 3, 3 }, /* 18 Mb */
34 [4] = { RC_L_SDT
, WLAN_RC_PHY_OFDM
, 24000,
35 17300, 4, 48, 4, 4, 4, 4 }, /* 24 Mb */
36 [5] = { RC_L_SDT
, WLAN_RC_PHY_OFDM
, 36000,
37 23000, 5, 72, 4, 5, 5, 5 }, /* 36 Mb */
38 [6] = { RC_L_SDT
, WLAN_RC_PHY_OFDM
, 48000,
39 27400, 6, 96, 4, 6, 6, 6 }, /* 48 Mb */
40 [7] = { RC_L_SDT
, WLAN_RC_PHY_OFDM
, 54000,
41 29300, 7, 108, 4, 7, 7, 7 }, /* 54 Mb */
42 [8] = { RC_HT_SDT_2040
, WLAN_RC_PHY_HT_20_SS
, 6500,
43 6400, 0, 0, 0, 38, 8, 38 }, /* 6.5 Mb */
44 [9] = { RC_HT_SDT_20
, WLAN_RC_PHY_HT_20_SS
, 13000,
45 12700, 1, 1, 2, 39, 9, 39 }, /* 13 Mb */
46 [10] = { RC_HT_SDT_20
, WLAN_RC_PHY_HT_20_SS
, 19500,
47 18800, 2, 2, 2, 40, 10, 40 }, /* 19.5 Mb */
48 [11] = { RC_HT_SD_20
, WLAN_RC_PHY_HT_20_SS
, 26000,
49 25000, 3, 3, 4, 41, 11, 41 }, /* 26 Mb */
50 [12] = { RC_HT_SD_20
, WLAN_RC_PHY_HT_20_SS
, 39000,
51 36700, 4, 4, 4, 42, 12, 42 }, /* 39 Mb */
52 [13] = { RC_HT_S_20
, WLAN_RC_PHY_HT_20_SS
, 52000,
53 48100, 5, 5, 4, 43, 13, 43 }, /* 52 Mb */
54 [14] = { RC_HT_S_20
, WLAN_RC_PHY_HT_20_SS
, 58500,
55 53500, 6, 6, 4, 44, 14, 44 }, /* 58.5 Mb */
56 [15] = { RC_HT_S_20
, WLAN_RC_PHY_HT_20_SS
, 65000,
57 59000, 7, 7, 4, 45, 16, 46 }, /* 65 Mb */
58 [16] = { RC_HT_S_20
, WLAN_RC_PHY_HT_20_SS_HGI
, 72200,
59 65400, 7, 7, 4, 45, 16, 46 }, /* 75 Mb */
60 [17] = { RC_INVALID
, WLAN_RC_PHY_HT_20_DS
, 13000,
61 12700, 8, 8, 0, 47, 17, 47 }, /* 13 Mb */
62 [18] = { RC_HT_T_20
, WLAN_RC_PHY_HT_20_DS
, 26000,
63 24800, 9, 9, 2, 48, 18, 48 }, /* 26 Mb */
64 [19] = { RC_HT_T_20
, WLAN_RC_PHY_HT_20_DS
, 39000,
65 36600, 10, 10, 2, 49, 19, 49 }, /* 39 Mb */
66 [20] = { RC_HT_DT_20
, WLAN_RC_PHY_HT_20_DS
, 52000,
67 48100, 11, 11, 4, 50, 20, 50 }, /* 52 Mb */
68 [21] = { RC_HT_DT_20
, WLAN_RC_PHY_HT_20_DS
, 78000,
69 69500, 12, 12, 4, 51, 21, 51 }, /* 78 Mb */
70 [22] = { RC_HT_DT_20
, WLAN_RC_PHY_HT_20_DS
, 104000,
71 89500, 13, 13, 4, 52, 22, 52 }, /* 104 Mb */
72 [23] = { RC_HT_DT_20
, WLAN_RC_PHY_HT_20_DS
, 117000,
73 98900, 14, 14, 4, 53, 23, 53 }, /* 117 Mb */
74 [24] = { RC_HT_DT_20
, WLAN_RC_PHY_HT_20_DS
, 130000,
75 108300, 15, 15, 4, 54, 25, 55 }, /* 130 Mb */
76 [25] = { RC_HT_DT_20
, WLAN_RC_PHY_HT_20_DS_HGI
, 144400,
77 120000, 15, 15, 4, 54, 25, 55 }, /* 144.4 Mb */
78 [26] = { RC_INVALID
, WLAN_RC_PHY_HT_20_TS
, 19500,
79 17400, 16, 16, 0, 56, 26, 56 }, /* 19.5 Mb */
80 [27] = { RC_INVALID
, WLAN_RC_PHY_HT_20_TS
, 39000,
81 35100, 17, 17, 2, 57, 27, 57 }, /* 39 Mb */
82 [28] = { RC_INVALID
, WLAN_RC_PHY_HT_20_TS
, 58500,
83 52600, 18, 18, 2, 58, 28, 58 }, /* 58.5 Mb */
84 [29] = { RC_INVALID
, WLAN_RC_PHY_HT_20_TS
, 78000,
85 70400, 19, 19, 4, 59, 29, 59 }, /* 78 Mb */
86 [30] = { RC_INVALID
, WLAN_RC_PHY_HT_20_TS
, 117000,
87 104900, 20, 20, 4, 60, 31, 61 }, /* 117 Mb */
88 [31] = { RC_INVALID
, WLAN_RC_PHY_HT_20_TS_HGI
, 130000,
89 115800, 20, 20, 4, 60, 31, 61 }, /* 130 Mb*/
90 [32] = { RC_HT_T_20
, WLAN_RC_PHY_HT_20_TS
, 156000,
91 137200, 21, 21, 4, 62, 33, 63 }, /* 156 Mb */
92 [33] = { RC_HT_T_20
, WLAN_RC_PHY_HT_20_TS_HGI
, 173300,
93 151100, 21, 21, 4, 62, 33, 63 }, /* 173.3 Mb */
94 [34] = { RC_HT_T_20
, WLAN_RC_PHY_HT_20_TS
, 175500,
95 152800, 22, 22, 4, 64, 35, 65 }, /* 175.5 Mb */
96 [35] = { RC_HT_T_20
, WLAN_RC_PHY_HT_20_TS_HGI
, 195000,
97 168400, 22, 22, 4, 64, 35, 65 }, /* 195 Mb*/
98 [36] = { RC_HT_T_20
, WLAN_RC_PHY_HT_20_TS
, 195000,
99 168400, 23, 23, 4, 66, 37, 67 }, /* 195 Mb */
100 [37] = { RC_HT_T_20
, WLAN_RC_PHY_HT_20_TS_HGI
, 216700,
101 185000, 23, 23, 4, 66, 37, 67 }, /* 216.7 Mb */
102 [38] = { RC_HT_SDT_40
, WLAN_RC_PHY_HT_40_SS
, 13500,
103 13200, 0, 0, 0, 38, 38, 38 }, /* 13.5 Mb*/
104 [39] = { RC_HT_SDT_40
, WLAN_RC_PHY_HT_40_SS
, 27500,
105 25900, 1, 1, 2, 39, 39, 39 }, /* 27.0 Mb*/
106 [40] = { RC_HT_SDT_40
, WLAN_RC_PHY_HT_40_SS
, 40500,
107 38600, 2, 2, 2, 40, 40, 40 }, /* 40.5 Mb*/
108 [41] = { RC_HT_SD_40
, WLAN_RC_PHY_HT_40_SS
, 54000,
109 49800, 3, 3, 4, 41, 41, 41 }, /* 54 Mb */
110 [42] = { RC_HT_SD_40
, WLAN_RC_PHY_HT_40_SS
, 81500,
111 72200, 4, 4, 4, 42, 42, 42 }, /* 81 Mb */
112 [43] = { RC_HT_S_40
, WLAN_RC_PHY_HT_40_SS
, 108000,
113 92900, 5, 5, 4, 43, 43, 43 }, /* 108 Mb */
114 [44] = { RC_HT_S_40
, WLAN_RC_PHY_HT_40_SS
, 121500,
115 102700, 6, 6, 4, 44, 44, 44 }, /* 121.5 Mb*/
116 [45] = { RC_HT_S_40
, WLAN_RC_PHY_HT_40_SS
, 135000,
117 112000, 7, 7, 4, 45, 46, 46 }, /* 135 Mb */
118 [46] = { RC_HT_S_40
, WLAN_RC_PHY_HT_40_SS_HGI
, 150000,
119 122000, 7, 7, 4, 45, 46, 46 }, /* 150 Mb */
120 [47] = { RC_INVALID
, WLAN_RC_PHY_HT_40_DS
, 27000,
121 25800, 8, 8, 0, 47, 47, 47 }, /* 27 Mb */
122 [48] = { RC_HT_T_40
, WLAN_RC_PHY_HT_40_DS
, 54000,
123 49800, 9, 9, 2, 48, 48, 48 }, /* 54 Mb */
124 [49] = { RC_HT_T_40
, WLAN_RC_PHY_HT_40_DS
, 81000,
125 71900, 10, 10, 2, 49, 49, 49 }, /* 81 Mb */
126 [50] = { RC_HT_DT_40
, WLAN_RC_PHY_HT_40_DS
, 108000,
127 92500, 11, 11, 4, 50, 50, 50 }, /* 108 Mb */
128 [51] = { RC_HT_DT_40
, WLAN_RC_PHY_HT_40_DS
, 162000,
129 130300, 12, 12, 4, 51, 51, 51 }, /* 162 Mb */
130 [52] = { RC_HT_DT_40
, WLAN_RC_PHY_HT_40_DS
, 216000,
131 162800, 13, 13, 4, 52, 52, 52 }, /* 216 Mb */
132 [53] = { RC_HT_DT_40
, WLAN_RC_PHY_HT_40_DS
, 243000,
133 178200, 14, 14, 4, 53, 53, 53 }, /* 243 Mb */
134 [54] = { RC_HT_DT_40
, WLAN_RC_PHY_HT_40_DS
, 270000,
135 192100, 15, 15, 4, 54, 55, 55 }, /* 270 Mb */
136 [55] = { RC_HT_DT_40
, WLAN_RC_PHY_HT_40_DS_HGI
, 300000,
137 207000, 15, 15, 4, 54, 55, 55 }, /* 300 Mb */
138 [56] = { RC_INVALID
, WLAN_RC_PHY_HT_40_TS
, 40500,
139 36100, 16, 16, 0, 56, 56, 56 }, /* 40.5 Mb */
140 [57] = { RC_INVALID
, WLAN_RC_PHY_HT_40_TS
, 81000,
141 72900, 17, 17, 2, 57, 57, 57 }, /* 81 Mb */
142 [58] = { RC_INVALID
, WLAN_RC_PHY_HT_40_TS
, 121500,
143 108300, 18, 18, 2, 58, 58, 58 }, /* 121.5 Mb */
144 [59] = { RC_INVALID
, WLAN_RC_PHY_HT_40_TS
, 162000,
145 142000, 19, 19, 4, 59, 59, 59 }, /* 162 Mb */
146 [60] = { RC_INVALID
, WLAN_RC_PHY_HT_40_TS
, 243000,
147 205100, 20, 20, 4, 60, 61, 61 }, /* 243 Mb */
148 [61] = { RC_INVALID
, WLAN_RC_PHY_HT_40_TS_HGI
, 270000,
149 224700, 20, 20, 4, 60, 61, 61 }, /* 270 Mb */
150 [62] = { RC_HT_T_40
, WLAN_RC_PHY_HT_40_TS
, 324000,
151 263100, 21, 21, 4, 62, 63, 63 }, /* 324 Mb */
152 [63] = { RC_HT_T_40
, WLAN_RC_PHY_HT_40_TS_HGI
, 360000,
153 288000, 21, 21, 4, 62, 63, 63 }, /* 360 Mb */
154 [64] = { RC_HT_T_40
, WLAN_RC_PHY_HT_40_TS
, 364500,
155 290700, 22, 22, 4, 64, 65, 65 }, /* 364.5 Mb */
156 [65] = { RC_HT_T_40
, WLAN_RC_PHY_HT_40_TS_HGI
, 405000,
157 317200, 22, 22, 4, 64, 65, 65 }, /* 405 Mb */
158 [66] = { RC_HT_T_40
, WLAN_RC_PHY_HT_40_TS
, 405000,
159 317200, 23, 23, 4, 66, 67, 67 }, /* 405 Mb */
160 [67] = { RC_HT_T_40
, WLAN_RC_PHY_HT_40_TS_HGI
, 450000,
161 346400, 23, 23, 4, 66, 67, 67 }, /* 450 Mb */
163 50, /* probe interval */
164 WLAN_RC_HT_FLAG
, /* Phy rates allowed initially */
167 /* 4ms frame limit not used for NG mode. The values filled
168 * for HT are the 64K max aggregate limit */
170 static const struct ath_rate_table ar5416_11ng_ratetable
= {
174 [0] = { RC_ALL
, WLAN_RC_PHY_CCK
, 1000,
175 900, 0, 2, 0, 0, 0, 0 }, /* 1 Mb */
176 [1] = { RC_ALL
, WLAN_RC_PHY_CCK
, 2000,
177 1900, 1, 4, 1, 1, 1, 1 }, /* 2 Mb */
178 [2] = { RC_ALL
, WLAN_RC_PHY_CCK
, 5500,
179 4900, 2, 11, 2, 2, 2, 2 }, /* 5.5 Mb */
180 [3] = { RC_ALL
, WLAN_RC_PHY_CCK
, 11000,
181 8100, 3, 22, 3, 3, 3, 3 }, /* 11 Mb */
182 [4] = { RC_INVALID
, WLAN_RC_PHY_OFDM
, 6000,
183 5400, 4, 12, 4, 4, 4, 4 }, /* 6 Mb */
184 [5] = { RC_INVALID
, WLAN_RC_PHY_OFDM
, 9000,
185 7800, 5, 18, 4, 5, 5, 5 }, /* 9 Mb */
186 [6] = { RC_L_SDT
, WLAN_RC_PHY_OFDM
, 12000,
187 10100, 6, 24, 6, 6, 6, 6 }, /* 12 Mb */
188 [7] = { RC_L_SDT
, WLAN_RC_PHY_OFDM
, 18000,
189 14100, 7, 36, 6, 7, 7, 7 }, /* 18 Mb */
190 [8] = { RC_L_SDT
, WLAN_RC_PHY_OFDM
, 24000,
191 17700, 8, 48, 8, 8, 8, 8 }, /* 24 Mb */
192 [9] = { RC_L_SDT
, WLAN_RC_PHY_OFDM
, 36000,
193 23700, 9, 72, 8, 9, 9, 9 }, /* 36 Mb */
194 [10] = { RC_L_SDT
, WLAN_RC_PHY_OFDM
, 48000,
195 27400, 10, 96, 8, 10, 10, 10 }, /* 48 Mb */
196 [11] = { RC_L_SDT
, WLAN_RC_PHY_OFDM
, 54000,
197 30900, 11, 108, 8, 11, 11, 11 }, /* 54 Mb */
198 [12] = { RC_INVALID
, WLAN_RC_PHY_HT_20_SS
, 6500,
199 6400, 0, 0, 4, 42, 12, 42 }, /* 6.5 Mb */
200 [13] = { RC_HT_SDT_20
, WLAN_RC_PHY_HT_20_SS
, 13000,
201 12700, 1, 1, 6, 43, 13, 43 }, /* 13 Mb */
202 [14] = { RC_HT_SDT_20
, WLAN_RC_PHY_HT_20_SS
, 19500,
203 18800, 2, 2, 6, 44, 14, 44 }, /* 19.5 Mb*/
204 [15] = { RC_HT_SD_20
, WLAN_RC_PHY_HT_20_SS
, 26000,
205 25000, 3, 3, 8, 45, 15, 45 }, /* 26 Mb */
206 [16] = { RC_HT_SD_20
, WLAN_RC_PHY_HT_20_SS
, 39000,
207 36700, 4, 4, 8, 46, 16, 46 }, /* 39 Mb */
208 [17] = { RC_HT_S_20
, WLAN_RC_PHY_HT_20_SS
, 52000,
209 48100, 5, 5, 8, 47, 17, 47 }, /* 52 Mb */
210 [18] = { RC_HT_S_20
, WLAN_RC_PHY_HT_20_SS
, 58500,
211 53500, 6, 6, 8, 48, 18, 48 }, /* 58.5 Mb */
212 [19] = { RC_HT_S_20
, WLAN_RC_PHY_HT_20_SS
, 65000,
213 59000, 7, 7, 8, 49, 20, 50 }, /* 65 Mb */
214 [20] = { RC_HT_S_20
, WLAN_RC_PHY_HT_20_SS_HGI
, 72200,
215 65400, 7, 7, 8, 49, 20, 50 }, /* 65 Mb*/
216 [21] = { RC_INVALID
, WLAN_RC_PHY_HT_20_DS
, 13000,
217 12700, 8, 8, 4, 51, 21, 51 }, /* 13 Mb */
218 [22] = { RC_HT_T_20
, WLAN_RC_PHY_HT_20_DS
, 26000,
219 24800, 9, 9, 6, 52, 22, 52 }, /* 26 Mb */
220 [23] = { RC_HT_T_20
, WLAN_RC_PHY_HT_20_DS
, 39000,
221 36600, 10, 10, 6, 53, 23, 53 }, /* 39 Mb */
222 [24] = { RC_HT_DT_20
, WLAN_RC_PHY_HT_20_DS
, 52000,
223 48100, 11, 11, 8, 54, 24, 54 }, /* 52 Mb */
224 [25] = { RC_HT_DT_20
, WLAN_RC_PHY_HT_20_DS
, 78000,
225 69500, 12, 12, 8, 55, 25, 55 }, /* 78 Mb */
226 [26] = { RC_HT_DT_20
, WLAN_RC_PHY_HT_20_DS
, 104000,
227 89500, 13, 13, 8, 56, 26, 56 }, /* 104 Mb */
228 [27] = { RC_HT_DT_20
, WLAN_RC_PHY_HT_20_DS
, 117000,
229 98900, 14, 14, 8, 57, 27, 57 }, /* 117 Mb */
230 [28] = { RC_HT_DT_20
, WLAN_RC_PHY_HT_20_DS
, 130000,
231 108300, 15, 15, 8, 58, 29, 59 }, /* 130 Mb */
232 [29] = { RC_HT_DT_20
, WLAN_RC_PHY_HT_20_DS_HGI
, 144400,
233 120000, 15, 15, 8, 58, 29, 59 }, /* 144.4 Mb */
234 [30] = { RC_INVALID
, WLAN_RC_PHY_HT_20_TS
, 19500,
235 17400, 16, 16, 4, 60, 30, 60 }, /* 19.5 Mb */
236 [31] = { RC_INVALID
, WLAN_RC_PHY_HT_20_TS
, 39000,
237 35100, 17, 17, 6, 61, 31, 61 }, /* 39 Mb */
238 [32] = { RC_INVALID
, WLAN_RC_PHY_HT_20_TS
, 58500,
239 52600, 18, 18, 6, 62, 32, 62 }, /* 58.5 Mb */
240 [33] = { RC_INVALID
, WLAN_RC_PHY_HT_20_TS
, 78000,
241 70400, 19, 19, 8, 63, 33, 63 }, /* 78 Mb */
242 [34] = { RC_INVALID
, WLAN_RC_PHY_HT_20_TS
, 117000,
243 104900, 20, 20, 8, 64, 35, 65 }, /* 117 Mb */
244 [35] = { RC_INVALID
, WLAN_RC_PHY_HT_20_TS_HGI
, 130000,
245 115800, 20, 20, 8, 64, 35, 65 }, /* 130 Mb */
246 [36] = { RC_HT_T_20
, WLAN_RC_PHY_HT_20_TS
, 156000,
247 137200, 21, 21, 8, 66, 37, 67 }, /* 156 Mb */
248 [37] = { RC_HT_T_20
, WLAN_RC_PHY_HT_20_TS_HGI
, 173300,
249 151100, 21, 21, 8, 66, 37, 67 }, /* 173.3 Mb */
250 [38] = { RC_HT_T_20
, WLAN_RC_PHY_HT_20_TS
, 175500,
251 152800, 22, 22, 8, 68, 39, 69 }, /* 175.5 Mb */
252 [39] = { RC_HT_T_20
, WLAN_RC_PHY_HT_20_TS_HGI
, 195000,
253 168400, 22, 22, 8, 68, 39, 69 }, /* 195 Mb */
254 [40] = { RC_HT_T_20
, WLAN_RC_PHY_HT_20_TS
, 195000,
255 168400, 23, 23, 8, 70, 41, 71 }, /* 195 Mb */
256 [41] = { RC_HT_T_20
, WLAN_RC_PHY_HT_20_TS_HGI
, 216700,
257 185000, 23, 23, 8, 70, 41, 71 }, /* 216.7 Mb */
258 [42] = { RC_HT_SDT_40
, WLAN_RC_PHY_HT_40_SS
, 13500,
259 13200, 0, 0, 8, 42, 42, 42 }, /* 13.5 Mb */
260 [43] = { RC_HT_SDT_40
, WLAN_RC_PHY_HT_40_SS
, 27500,
261 25900, 1, 1, 8, 43, 43, 43 }, /* 27.0 Mb */
262 [44] = { RC_HT_SDT_40
, WLAN_RC_PHY_HT_40_SS
, 40500,
263 38600, 2, 2, 8, 44, 44, 44 }, /* 40.5 Mb */
264 [45] = { RC_HT_SD_40
, WLAN_RC_PHY_HT_40_SS
, 54000,
265 49800, 3, 3, 8, 45, 45, 45 }, /* 54 Mb */
266 [46] = { RC_HT_SD_40
, WLAN_RC_PHY_HT_40_SS
, 81500,
267 72200, 4, 4, 8, 46, 46, 46 }, /* 81 Mb */
268 [47] = { RC_HT_S_40
, WLAN_RC_PHY_HT_40_SS
, 108000,
269 92900, 5, 5, 8, 47, 47, 47 }, /* 108 Mb */
270 [48] = { RC_HT_S_40
, WLAN_RC_PHY_HT_40_SS
, 121500,
271 102700, 6, 6, 8, 48, 48, 48 }, /* 121.5 Mb */
272 [49] = { RC_HT_S_40
, WLAN_RC_PHY_HT_40_SS
, 135000,
273 112000, 7, 7, 8, 49, 50, 50 }, /* 135 Mb */
274 [50] = { RC_HT_S_40
, WLAN_RC_PHY_HT_40_SS_HGI
, 150000,
275 122000, 7, 7, 8, 49, 50, 50 }, /* 150 Mb */
276 [51] = { RC_INVALID
, WLAN_RC_PHY_HT_40_DS
, 27000,
277 25800, 8, 8, 8, 51, 51, 51 }, /* 27 Mb */
278 [52] = { RC_HT_T_40
, WLAN_RC_PHY_HT_40_DS
, 54000,
279 49800, 9, 9, 8, 52, 52, 52 }, /* 54 Mb */
280 [53] = { RC_HT_T_40
, WLAN_RC_PHY_HT_40_DS
, 81000,
281 71900, 10, 10, 8, 53, 53, 53 }, /* 81 Mb */
282 [54] = { RC_HT_DT_40
, WLAN_RC_PHY_HT_40_DS
, 108000,
283 92500, 11, 11, 8, 54, 54, 54 }, /* 108 Mb */
284 [55] = { RC_HT_DT_40
, WLAN_RC_PHY_HT_40_DS
, 162000,
285 130300, 12, 12, 8, 55, 55, 55 }, /* 162 Mb */
286 [56] = { RC_HT_DT_40
, WLAN_RC_PHY_HT_40_DS
, 216000,
287 162800, 13, 13, 8, 56, 56, 56 }, /* 216 Mb */
288 [57] = { RC_HT_DT_40
, WLAN_RC_PHY_HT_40_DS
, 243000,
289 178200, 14, 14, 8, 57, 57, 57 }, /* 243 Mb */
290 [58] = { RC_HT_DT_40
, WLAN_RC_PHY_HT_40_DS
, 270000,
291 192100, 15, 15, 8, 58, 59, 59 }, /* 270 Mb */
292 [59] = { RC_HT_DT_40
, WLAN_RC_PHY_HT_40_DS_HGI
, 300000,
293 207000, 15, 15, 8, 58, 59, 59 }, /* 300 Mb */
294 [60] = { RC_INVALID
, WLAN_RC_PHY_HT_40_TS
, 40500,
295 36100, 16, 16, 8, 60, 60, 60 }, /* 40.5 Mb */
296 [61] = { RC_INVALID
, WLAN_RC_PHY_HT_40_TS
, 81000,
297 72900, 17, 17, 8, 61, 61, 61 }, /* 81 Mb */
298 [62] = { RC_INVALID
, WLAN_RC_PHY_HT_40_TS
, 121500,
299 108300, 18, 18, 8, 62, 62, 62 }, /* 121.5 Mb */
300 [63] = { RC_INVALID
, WLAN_RC_PHY_HT_40_TS
, 162000,
301 142000, 19, 19, 8, 63, 63, 63 }, /* 162 Mb */
302 [64] = { RC_INVALID
, WLAN_RC_PHY_HT_40_TS
, 243000,
303 205100, 20, 20, 8, 64, 65, 65 }, /* 243 Mb */
304 [65] = { RC_INVALID
, WLAN_RC_PHY_HT_40_TS_HGI
, 270000,
305 224700, 20, 20, 8, 64, 65, 65 }, /* 270 Mb */
306 [66] = { RC_HT_T_40
, WLAN_RC_PHY_HT_40_TS
, 324000,
307 263100, 21, 21, 8, 66, 67, 67 }, /* 324 Mb */
308 [67] = { RC_HT_T_40
, WLAN_RC_PHY_HT_40_TS_HGI
, 360000,
309 288000, 21, 21, 8, 66, 67, 67 }, /* 360 Mb */
310 [68] = { RC_HT_T_40
, WLAN_RC_PHY_HT_40_TS
, 364500,
311 290700, 22, 22, 8, 68, 69, 69 }, /* 364.5 Mb */
312 [69] = { RC_HT_T_40
, WLAN_RC_PHY_HT_40_TS_HGI
, 405000,
313 317200, 22, 22, 8, 68, 69, 69 }, /* 405 Mb */
314 [70] = { RC_HT_T_40
, WLAN_RC_PHY_HT_40_TS
, 405000,
315 317200, 23, 23, 8, 70, 71, 71 }, /* 405 Mb */
316 [71] = { RC_HT_T_40
, WLAN_RC_PHY_HT_40_TS_HGI
, 450000,
317 346400, 23, 23, 8, 70, 71, 71 }, /* 450 Mb */
319 50, /* probe interval */
320 WLAN_RC_HT_FLAG
, /* Phy rates allowed initially */
323 static const struct ath_rate_table ar5416_11a_ratetable
= {
327 { RC_L_SDT
, WLAN_RC_PHY_OFDM
, 6000, /* 6 Mb */
329 { RC_L_SDT
, WLAN_RC_PHY_OFDM
, 9000, /* 9 Mb */
331 { RC_L_SDT
, WLAN_RC_PHY_OFDM
, 12000, /* 12 Mb */
333 { RC_L_SDT
, WLAN_RC_PHY_OFDM
, 18000, /* 18 Mb */
335 { RC_L_SDT
, WLAN_RC_PHY_OFDM
, 24000, /* 24 Mb */
337 { RC_L_SDT
, WLAN_RC_PHY_OFDM
, 36000, /* 36 Mb */
339 { RC_L_SDT
, WLAN_RC_PHY_OFDM
, 48000, /* 48 Mb */
341 { RC_L_SDT
, WLAN_RC_PHY_OFDM
, 54000, /* 54 Mb */
344 50, /* probe interval */
345 0, /* Phy rates allowed initially */
348 static const struct ath_rate_table ar5416_11g_ratetable
= {
352 { RC_L_SDT
, WLAN_RC_PHY_CCK
, 1000, /* 1 Mb */
354 { RC_L_SDT
, WLAN_RC_PHY_CCK
, 2000, /* 2 Mb */
356 { RC_L_SDT
, WLAN_RC_PHY_CCK
, 5500, /* 5.5 Mb */
358 { RC_L_SDT
, WLAN_RC_PHY_CCK
, 11000, /* 11 Mb */
360 { RC_INVALID
, WLAN_RC_PHY_OFDM
, 6000, /* 6 Mb */
362 { RC_INVALID
, WLAN_RC_PHY_OFDM
, 9000, /* 9 Mb */
364 { RC_L_SDT
, WLAN_RC_PHY_OFDM
, 12000, /* 12 Mb */
366 { RC_L_SDT
, WLAN_RC_PHY_OFDM
, 18000, /* 18 Mb */
368 { RC_L_SDT
, WLAN_RC_PHY_OFDM
, 24000, /* 24 Mb */
370 { RC_L_SDT
, WLAN_RC_PHY_OFDM
, 36000, /* 36 Mb */
372 { RC_L_SDT
, WLAN_RC_PHY_OFDM
, 48000, /* 48 Mb */
374 { RC_L_SDT
, WLAN_RC_PHY_OFDM
, 54000, /* 54 Mb */
377 50, /* probe interval */
378 0, /* Phy rates allowed initially */
381 static int ath_rc_get_rateindex(const struct ath_rate_table
*rate_table
,
382 struct ieee80211_tx_rate
*rate
);
384 static inline int8_t median(int8_t a
, int8_t b
, int8_t c
)
403 static void ath_rc_sort_validrates(const struct ath_rate_table
*rate_table
,
404 struct ath_rate_priv
*ath_rc_priv
)
406 u8 i
, j
, idx
, idx_next
;
408 for (i
= ath_rc_priv
->max_valid_rate
- 1; i
> 0; i
--) {
409 for (j
= 0; j
<= i
-1; j
++) {
410 idx
= ath_rc_priv
->valid_rate_index
[j
];
411 idx_next
= ath_rc_priv
->valid_rate_index
[j
+1];
413 if (rate_table
->info
[idx
].ratekbps
>
414 rate_table
->info
[idx_next
].ratekbps
) {
415 ath_rc_priv
->valid_rate_index
[j
] = idx_next
;
416 ath_rc_priv
->valid_rate_index
[j
+1] = idx
;
422 static void ath_rc_init_valid_txmask(struct ath_rate_priv
*ath_rc_priv
)
426 for (i
= 0; i
< ath_rc_priv
->rate_table_size
; i
++)
427 ath_rc_priv
->valid_rate_index
[i
] = 0;
430 static inline void ath_rc_set_valid_txmask(struct ath_rate_priv
*ath_rc_priv
,
431 u8 index
, int valid_tx_rate
)
433 BUG_ON(index
> ath_rc_priv
->rate_table_size
);
434 ath_rc_priv
->valid_rate_index
[index
] = !!valid_tx_rate
;
438 int ath_rc_get_nextvalid_txrate(const struct ath_rate_table
*rate_table
,
439 struct ath_rate_priv
*ath_rc_priv
,
445 for (i
= 0; i
< ath_rc_priv
->max_valid_rate
- 1; i
++) {
446 if (ath_rc_priv
->valid_rate_index
[i
] == cur_valid_txrate
) {
447 *next_idx
= ath_rc_priv
->valid_rate_index
[i
+1];
452 /* No more valid rates */
458 /* Return true only for single stream */
460 static int ath_rc_valid_phyrate(u32 phy
, u32 capflag
, int ignore_cw
)
462 if (WLAN_RC_PHY_HT(phy
) && !(capflag
& WLAN_RC_HT_FLAG
))
464 if (WLAN_RC_PHY_DS(phy
) && !(capflag
& WLAN_RC_DS_FLAG
))
466 if (WLAN_RC_PHY_TS(phy
) && !(capflag
& WLAN_RC_TS_FLAG
))
468 if (WLAN_RC_PHY_SGI(phy
) && !(capflag
& WLAN_RC_SGI_FLAG
))
470 if (!ignore_cw
&& WLAN_RC_PHY_HT(phy
))
471 if (WLAN_RC_PHY_40(phy
) && !(capflag
& WLAN_RC_40_FLAG
))
477 ath_rc_get_lower_rix(const struct ath_rate_table
*rate_table
,
478 struct ath_rate_priv
*ath_rc_priv
,
479 u8 cur_valid_txrate
, u8
*next_idx
)
483 for (i
= 1; i
< ath_rc_priv
->max_valid_rate
; i
++) {
484 if (ath_rc_priv
->valid_rate_index
[i
] == cur_valid_txrate
) {
485 *next_idx
= ath_rc_priv
->valid_rate_index
[i
-1];
493 static u8
ath_rc_init_validrates(struct ath_rate_priv
*ath_rc_priv
,
494 const struct ath_rate_table
*rate_table
,
499 for (i
= 0; i
< rate_table
->rate_cnt
; i
++) {
500 if (rate_table
->info
[i
].rate_flags
& RC_LEGACY
) {
501 u32 phy
= rate_table
->info
[i
].phy
;
502 u8 valid_rate_count
= 0;
504 if (!ath_rc_valid_phyrate(phy
, capflag
, 0))
507 valid_rate_count
= ath_rc_priv
->valid_phy_ratecnt
[phy
];
509 ath_rc_priv
->valid_phy_rateidx
[phy
][valid_rate_count
] = i
;
510 ath_rc_priv
->valid_phy_ratecnt
[phy
] += 1;
511 ath_rc_set_valid_txmask(ath_rc_priv
, i
, 1);
519 static u8
ath_rc_setvalid_rates(struct ath_rate_priv
*ath_rc_priv
,
520 const struct ath_rate_table
*rate_table
,
521 struct ath_rateset
*rateset
,
526 /* Use intersection of working rates and valid rates */
527 for (i
= 0; i
< rateset
->rs_nrates
; i
++) {
528 for (j
= 0; j
< rate_table
->rate_cnt
; j
++) {
529 u32 phy
= rate_table
->info
[j
].phy
;
530 u16 rate_flags
= rate_table
->info
[i
].rate_flags
;
531 u8 rate
= rateset
->rs_rates
[i
];
532 u8 dot11rate
= rate_table
->info
[j
].dot11rate
;
534 /* We allow a rate only if its valid and the
535 * capflag matches one of the validity
536 * (VALID/VALID_20/VALID_40) flags */
538 if ((rate
== dot11rate
) &&
539 (rate_flags
& WLAN_RC_CAP_MODE(capflag
)) ==
540 WLAN_RC_CAP_MODE(capflag
) &&
541 (rate_flags
& WLAN_RC_CAP_STREAM(capflag
)) &&
542 !WLAN_RC_PHY_HT(phy
)) {
543 u8 valid_rate_count
= 0;
545 if (!ath_rc_valid_phyrate(phy
, capflag
, 0))
549 ath_rc_priv
->valid_phy_ratecnt
[phy
];
551 ath_rc_priv
->valid_phy_rateidx
[phy
]
552 [valid_rate_count
] = j
;
553 ath_rc_priv
->valid_phy_ratecnt
[phy
] += 1;
554 ath_rc_set_valid_txmask(ath_rc_priv
, j
, 1);
563 static u8
ath_rc_setvalid_htrates(struct ath_rate_priv
*ath_rc_priv
,
564 const struct ath_rate_table
*rate_table
,
565 u8
*mcs_set
, u32 capflag
)
567 struct ath_rateset
*rateset
= (struct ath_rateset
*)mcs_set
;
571 /* Use intersection of working rates and valid rates */
572 for (i
= 0; i
< rateset
->rs_nrates
; i
++) {
573 for (j
= 0; j
< rate_table
->rate_cnt
; j
++) {
574 u32 phy
= rate_table
->info
[j
].phy
;
575 u16 rate_flags
= rate_table
->info
[j
].rate_flags
;
576 u8 rate
= rateset
->rs_rates
[i
];
577 u8 dot11rate
= rate_table
->info
[j
].dot11rate
;
579 if ((rate
!= dot11rate
) || !WLAN_RC_PHY_HT(phy
) ||
580 !(rate_flags
& WLAN_RC_CAP_STREAM(capflag
)) ||
581 !WLAN_RC_PHY_HT_VALID(rate_flags
, capflag
))
584 if (!ath_rc_valid_phyrate(phy
, capflag
, 0))
587 ath_rc_priv
->valid_phy_rateidx
[phy
]
588 [ath_rc_priv
->valid_phy_ratecnt
[phy
]] = j
;
589 ath_rc_priv
->valid_phy_ratecnt
[phy
] += 1;
590 ath_rc_set_valid_txmask(ath_rc_priv
, j
, 1);
598 /* Finds the highest rate index we can use */
599 static u8
ath_rc_get_highest_rix(struct ath_softc
*sc
,
600 struct ath_rate_priv
*ath_rc_priv
,
601 const struct ath_rate_table
*rate_table
,
604 u32 best_thruput
, this_thruput
, now_msec
;
605 u8 rate
, next_rate
, best_rate
, maxindex
, minindex
;
608 now_msec
= jiffies_to_msecs(jiffies
);
611 maxindex
= ath_rc_priv
->max_valid_rate
-1;
613 best_rate
= minindex
;
616 * Try the higher rate first. It will reduce memory moving time
617 * if we have very good channel characteristics.
619 for (index
= maxindex
; index
>= minindex
; index
--) {
622 rate
= ath_rc_priv
->valid_rate_index
[index
];
623 if (rate
> ath_rc_priv
->rate_max_phy
)
627 * For TCP the average collision rate is around 11%,
628 * so we ignore PERs less than this. This is to
629 * prevent the rate we are currently using (whose
630 * PER might be in the 10-15 range because of TCP
631 * collisions) looking worse than the next lower
632 * rate whose PER has decayed close to 0. If we
633 * used to next lower rate, its PER would grow to
634 * 10-15 and we would be worse off then staying
635 * at the current rate.
637 per_thres
= ath_rc_priv
->per
[rate
];
641 this_thruput
= rate_table
->info
[rate
].user_ratekbps
*
644 if (best_thruput
<= this_thruput
) {
645 best_thruput
= this_thruput
;
653 * Must check the actual rate (ratekbps) to account for
654 * non-monoticity of 11g's rate table
657 if (rate
>= ath_rc_priv
->rate_max_phy
) {
658 rate
= ath_rc_priv
->rate_max_phy
;
660 /* Probe the next allowed phy state */
661 if (ath_rc_get_nextvalid_txrate(rate_table
,
662 ath_rc_priv
, rate
, &next_rate
) &&
663 (now_msec
- ath_rc_priv
->probe_time
>
664 rate_table
->probe_interval
) &&
665 (ath_rc_priv
->hw_maxretry_pktcnt
>= 1)) {
667 ath_rc_priv
->probe_rate
= rate
;
668 ath_rc_priv
->probe_time
= now_msec
;
669 ath_rc_priv
->hw_maxretry_pktcnt
= 0;
674 if (rate
> (ath_rc_priv
->rate_table_size
- 1))
675 rate
= ath_rc_priv
->rate_table_size
- 1;
677 if (RC_TS_ONLY(rate_table
->info
[rate
].rate_flags
) &&
678 (ath_rc_priv
->ht_cap
& WLAN_RC_TS_FLAG
))
681 if (RC_DS_OR_LATER(rate_table
->info
[rate
].rate_flags
) &&
682 (ath_rc_priv
->ht_cap
& (WLAN_RC_DS_FLAG
| WLAN_RC_TS_FLAG
)))
685 if (RC_SS_OR_LEGACY(rate_table
->info
[rate
].rate_flags
))
688 /* This should not happen */
691 rate
= ath_rc_priv
->valid_rate_index
[0];
696 static void ath_rc_rate_set_series(const struct ath_rate_table
*rate_table
,
697 struct ieee80211_tx_rate
*rate
,
698 struct ieee80211_tx_rate_control
*txrc
,
699 u8 tries
, u8 rix
, int rtsctsenable
)
702 rate
->idx
= rate_table
->info
[rix
].ratecode
;
704 if (txrc
->short_preamble
)
705 rate
->flags
|= IEEE80211_TX_RC_USE_SHORT_PREAMBLE
;
706 if (txrc
->rts
|| rtsctsenable
)
707 rate
->flags
|= IEEE80211_TX_RC_USE_RTS_CTS
;
709 if (WLAN_RC_PHY_HT(rate_table
->info
[rix
].phy
)) {
710 rate
->flags
|= IEEE80211_TX_RC_MCS
;
711 if (WLAN_RC_PHY_40(rate_table
->info
[rix
].phy
))
712 rate
->flags
|= IEEE80211_TX_RC_40_MHZ_WIDTH
;
713 if (WLAN_RC_PHY_SGI(rate_table
->info
[rix
].phy
))
714 rate
->flags
|= IEEE80211_TX_RC_SHORT_GI
;
718 static void ath_rc_rate_set_rtscts(struct ath_softc
*sc
,
719 const struct ath_rate_table
*rate_table
,
720 struct ieee80211_tx_info
*tx_info
)
722 struct ieee80211_tx_rate
*rates
= tx_info
->control
.rates
;
723 int i
= 0, rix
= 0, cix
, enable_g_protection
= 0;
725 /* get the cix for the lowest valid rix */
726 for (i
= 3; i
>= 0; i
--) {
727 if (rates
[i
].count
&& (rates
[i
].idx
>= 0)) {
728 rix
= ath_rc_get_rateindex(rate_table
, &rates
[i
]);
732 cix
= rate_table
->info
[rix
].ctrl_rate
;
734 /* All protection frames are transmited at 2Mb/s for 802.11g,
735 * otherwise we transmit them at 1Mb/s */
736 if (sc
->hw
->conf
.channel
->band
== IEEE80211_BAND_2GHZ
&&
737 !conf_is_ht(&sc
->hw
->conf
))
738 enable_g_protection
= 1;
741 * If 802.11g protection is enabled, determine whether to use RTS/CTS or
742 * just CTS. Note that this is only done for OFDM/HT unicast frames.
744 if ((sc
->sc_flags
& SC_OP_PROTECT_ENABLE
) &&
745 (rate_table
->info
[rix
].phy
== WLAN_RC_PHY_OFDM
||
746 WLAN_RC_PHY_HT(rate_table
->info
[rix
].phy
))) {
747 rates
[0].flags
|= IEEE80211_TX_RC_USE_CTS_PROTECT
;
748 cix
= rate_table
->info
[enable_g_protection
].ctrl_rate
;
751 tx_info
->control
.rts_cts_rate_idx
= cix
;
754 static void ath_get_rate(void *priv
, struct ieee80211_sta
*sta
, void *priv_sta
,
755 struct ieee80211_tx_rate_control
*txrc
)
757 struct ath_softc
*sc
= priv
;
758 struct ath_rate_priv
*ath_rc_priv
= priv_sta
;
759 const struct ath_rate_table
*rate_table
;
760 struct sk_buff
*skb
= txrc
->skb
;
761 struct ieee80211_tx_info
*tx_info
= IEEE80211_SKB_CB(skb
);
762 struct ieee80211_tx_rate
*rates
= tx_info
->control
.rates
;
763 struct ieee80211_hdr
*hdr
= (struct ieee80211_hdr
*)skb
->data
;
764 __le16 fc
= hdr
->frame_control
;
765 u8 try_per_rate
, i
= 0, rix
;
768 if (rate_control_send_low(sta
, priv_sta
, txrc
))
772 * For Multi Rate Retry we use a different number of
773 * retry attempt counts. This ends up looking like this:
783 rate_table
= ath_rc_priv
->rate_table
;
784 rix
= ath_rc_get_highest_rix(sc
, ath_rc_priv
, rate_table
, &is_probe
);
787 * If we're in HT mode and both us and our peer supports LDPC.
788 * We don't need to check our own device's capabilities as our own
789 * ht capabilities would have already been intersected with our peer's.
791 if (conf_is_ht(&sc
->hw
->conf
) &&
792 (sta
->ht_cap
.cap
& IEEE80211_HT_CAP_LDPC_CODING
))
793 tx_info
->flags
|= IEEE80211_TX_CTL_LDPC
;
795 if (conf_is_ht(&sc
->hw
->conf
) &&
796 (sta
->ht_cap
.cap
& IEEE80211_HT_CAP_TX_STBC
))
797 tx_info
->flags
|= (1 << IEEE80211_TX_CTL_STBC_SHIFT
);
800 /* set one try for probe rates. For the
801 * probes don't enable rts */
802 ath_rc_rate_set_series(rate_table
, &rates
[i
++], txrc
,
805 /* Get the next tried/allowed rate. No RTS for the next series
806 * after the probe rate
808 ath_rc_get_lower_rix(rate_table
, ath_rc_priv
, rix
, &rix
);
809 ath_rc_rate_set_series(rate_table
, &rates
[i
++], txrc
,
810 try_per_rate
, rix
, 0);
812 tx_info
->flags
|= IEEE80211_TX_CTL_RATE_CTRL_PROBE
;
814 /* Set the choosen rate. No RTS for first series entry. */
815 ath_rc_rate_set_series(rate_table
, &rates
[i
++], txrc
,
816 try_per_rate
, rix
, 0);
819 /* Fill in the other rates for multirate retry */
820 for ( ; i
< 4; i
++) {
821 /* Use twice the number of tries for the last MRR segment. */
825 ath_rc_get_lower_rix(rate_table
, ath_rc_priv
, rix
, &rix
);
826 /* All other rates in the series have RTS enabled */
827 ath_rc_rate_set_series(rate_table
, &rates
[i
], txrc
,
828 try_per_rate
, rix
, 1);
832 * NB:Change rate series to enable aggregation when operating
833 * at lower MCS rates. When first rate in series is MCS2
834 * in HT40 @ 2.4GHz, series should look like:
836 * {MCS2, MCS1, MCS0, MCS0}.
838 * When first rate in series is MCS3 in HT20 @ 2.4GHz, series should
841 * {MCS3, MCS2, MCS1, MCS1}
843 * So, set fourth rate in series to be same as third one for
846 if ((sc
->hw
->conf
.channel
->band
== IEEE80211_BAND_2GHZ
) &&
847 (conf_is_ht(&sc
->hw
->conf
))) {
848 u8 dot11rate
= rate_table
->info
[rix
].dot11rate
;
849 u8 phy
= rate_table
->info
[rix
].phy
;
851 ((dot11rate
== 2 && phy
== WLAN_RC_PHY_HT_40_SS
) ||
852 (dot11rate
== 3 && phy
== WLAN_RC_PHY_HT_20_SS
))) {
853 rates
[3].idx
= rates
[2].idx
;
854 rates
[3].flags
= rates
[2].flags
;
859 * Force hardware to use computed duration for next
860 * fragment by disabling multi-rate retry, which
861 * updates duration based on the multi-rate duration table.
863 * FIXME: Fix duration
865 if (ieee80211_has_morefrags(fc
) ||
866 (le16_to_cpu(hdr
->seq_ctrl
) & IEEE80211_SCTL_FRAG
)) {
867 rates
[1].count
= rates
[2].count
= rates
[3].count
= 0;
868 rates
[1].idx
= rates
[2].idx
= rates
[3].idx
= 0;
869 rates
[0].count
= ATH_TXMAXTRY
;
873 ath_rc_rate_set_rtscts(sc
, rate_table
, tx_info
);
876 static bool ath_rc_update_per(struct ath_softc
*sc
,
877 const struct ath_rate_table
*rate_table
,
878 struct ath_rate_priv
*ath_rc_priv
,
879 struct ieee80211_tx_info
*tx_info
,
880 int tx_rate
, int xretries
, int retries
,
883 bool state_change
= false;
884 int count
, n_bad_frames
;
886 static u32 nretry_to_per_lookup
[10] = {
899 last_per
= ath_rc_priv
->per
[tx_rate
];
900 n_bad_frames
= tx_info
->status
.ampdu_len
- tx_info
->status
.ampdu_ack_len
;
904 ath_rc_priv
->per
[tx_rate
] += 30;
905 if (ath_rc_priv
->per
[tx_rate
] > 100)
906 ath_rc_priv
->per
[tx_rate
] = 100;
909 count
= ARRAY_SIZE(nretry_to_per_lookup
);
910 if (retries
>= count
)
913 /* new_PER = 7/8*old_PER + 1/8*(currentPER) */
914 ath_rc_priv
->per
[tx_rate
] =
915 (u8
)(last_per
- (last_per
>> 3) + (100 >> 3));
918 /* xretries == 1 or 2 */
920 if (ath_rc_priv
->probe_rate
== tx_rate
)
921 ath_rc_priv
->probe_rate
= 0;
923 } else { /* xretries == 0 */
924 count
= ARRAY_SIZE(nretry_to_per_lookup
);
925 if (retries
>= count
)
929 /* new_PER = 7/8*old_PER + 1/8*(currentPER)
930 * Assuming that n_frames is not 0. The current PER
931 * from the retries is 100 * retries / (retries+1),
932 * since the first retries attempts failed, and the
933 * next one worked. For the one that worked,
934 * n_bad_frames subframes out of n_frames wored,
935 * so the PER for that part is
936 * 100 * n_bad_frames / n_frames, and it contributes
937 * 100 * n_bad_frames / (n_frames * (retries+1)) to
938 * the above PER. The expression below is a
939 * simplified version of the sum of these two terms.
941 if (tx_info
->status
.ampdu_len
> 0) {
942 int n_frames
, n_bad_tries
;
945 n_bad_tries
= retries
* tx_info
->status
.ampdu_len
+
947 n_frames
= tx_info
->status
.ampdu_len
* (retries
+ 1);
948 cur_per
= (100 * n_bad_tries
/ n_frames
) >> 3;
949 new_per
= (u8
)(last_per
- (last_per
>> 3) + cur_per
);
950 ath_rc_priv
->per
[tx_rate
] = new_per
;
953 ath_rc_priv
->per
[tx_rate
] =
954 (u8
)(last_per
- (last_per
>> 3) +
955 (nretry_to_per_lookup
[retries
] >> 3));
960 * If we got at most one retry then increase the max rate if
961 * this was a probe. Otherwise, ignore the probe.
963 if (ath_rc_priv
->probe_rate
&& ath_rc_priv
->probe_rate
== tx_rate
) {
964 if (retries
> 0 || 2 * n_bad_frames
> tx_info
->status
.ampdu_len
) {
966 * Since we probed with just a single attempt,
967 * any retries means the probe failed. Also,
968 * if the attempt worked, but more than half
969 * the subframes were bad then also consider
970 * the probe a failure.
972 ath_rc_priv
->probe_rate
= 0;
976 ath_rc_priv
->rate_max_phy
=
977 ath_rc_priv
->probe_rate
;
978 probe_rate
= ath_rc_priv
->probe_rate
;
980 if (ath_rc_priv
->per
[probe_rate
] > 30)
981 ath_rc_priv
->per
[probe_rate
] = 20;
983 ath_rc_priv
->probe_rate
= 0;
986 * Since this probe succeeded, we allow the next
987 * probe twice as soon. This allows the maxRate
988 * to move up faster if the probes are
991 ath_rc_priv
->probe_time
=
992 now_msec
- rate_table
->probe_interval
/ 2;
998 * Don't update anything. We don't know if
999 * this was because of collisions or poor signal.
1001 ath_rc_priv
->hw_maxretry_pktcnt
= 0;
1004 * It worked with no retries. First ignore bogus (small)
1007 if (tx_rate
== ath_rc_priv
->rate_max_phy
&&
1008 ath_rc_priv
->hw_maxretry_pktcnt
< 255) {
1009 ath_rc_priv
->hw_maxretry_pktcnt
++;
1015 return state_change
;
1018 static void ath_debug_stat_retries(struct ath_rate_priv
*rc
, int rix
,
1019 int xretries
, int retries
, u8 per
)
1021 struct ath_rc_stats
*stats
= &rc
->rcstats
[rix
];
1023 stats
->xretries
+= xretries
;
1024 stats
->retries
+= retries
;
1028 /* Update PER, RSSI and whatever else that the code thinks it is doing.
1029 If you can make sense of all this, you really need to go out more. */
1031 static void ath_rc_update_ht(struct ath_softc
*sc
,
1032 struct ath_rate_priv
*ath_rc_priv
,
1033 struct ieee80211_tx_info
*tx_info
,
1034 int tx_rate
, int xretries
, int retries
)
1036 u32 now_msec
= jiffies_to_msecs(jiffies
);
1039 bool state_change
= false;
1040 const struct ath_rate_table
*rate_table
= ath_rc_priv
->rate_table
;
1041 int size
= ath_rc_priv
->rate_table_size
;
1043 if ((tx_rate
< 0) || (tx_rate
> rate_table
->rate_cnt
))
1046 last_per
= ath_rc_priv
->per
[tx_rate
];
1048 /* Update PER first */
1049 state_change
= ath_rc_update_per(sc
, rate_table
, ath_rc_priv
,
1050 tx_info
, tx_rate
, xretries
,
1054 * If this rate looks bad (high PER) then stop using it for
1055 * a while (except if we are probing).
1057 if (ath_rc_priv
->per
[tx_rate
] >= 55 && tx_rate
> 0 &&
1058 rate_table
->info
[tx_rate
].ratekbps
<=
1059 rate_table
->info
[ath_rc_priv
->rate_max_phy
].ratekbps
) {
1060 ath_rc_get_lower_rix(rate_table
, ath_rc_priv
,
1061 (u8
)tx_rate
, &ath_rc_priv
->rate_max_phy
);
1063 /* Don't probe for a little while. */
1064 ath_rc_priv
->probe_time
= now_msec
;
1067 /* Make sure the rates below this have lower PER */
1068 /* Monotonicity is kept only for rates below the current rate. */
1069 if (ath_rc_priv
->per
[tx_rate
] < last_per
) {
1070 for (rate
= tx_rate
- 1; rate
>= 0; rate
--) {
1072 if (ath_rc_priv
->per
[rate
] >
1073 ath_rc_priv
->per
[rate
+1]) {
1074 ath_rc_priv
->per
[rate
] =
1075 ath_rc_priv
->per
[rate
+1];
1080 /* Maintain monotonicity for rates above the current rate */
1081 for (rate
= tx_rate
; rate
< size
- 1; rate
++) {
1082 if (ath_rc_priv
->per
[rate
+1] <
1083 ath_rc_priv
->per
[rate
])
1084 ath_rc_priv
->per
[rate
+1] =
1085 ath_rc_priv
->per
[rate
];
1088 /* Every so often, we reduce the thresholds
1089 * and PER (different for CCK and OFDM). */
1090 if (now_msec
- ath_rc_priv
->per_down_time
>=
1091 rate_table
->probe_interval
) {
1092 for (rate
= 0; rate
< size
; rate
++) {
1093 ath_rc_priv
->per
[rate
] =
1094 7 * ath_rc_priv
->per
[rate
] / 8;
1097 ath_rc_priv
->per_down_time
= now_msec
;
1100 ath_debug_stat_retries(ath_rc_priv
, tx_rate
, xretries
, retries
,
1101 ath_rc_priv
->per
[tx_rate
]);
1105 static int ath_rc_get_rateindex(const struct ath_rate_table
*rate_table
,
1106 struct ieee80211_tx_rate
*rate
)
1109 int mcs_rix_off
[] = { 7, 15, 20, 21, 22, 23 };
1111 if (!(rate
->flags
& IEEE80211_TX_RC_MCS
))
1114 while (rate
->idx
> mcs_rix_off
[i
] &&
1115 i
< sizeof(mcs_rix_off
)/sizeof(int)) {
1119 rix
+= rate
->idx
+ rate_table
->mcs_start
;
1121 if ((rate
->flags
& IEEE80211_TX_RC_40_MHZ_WIDTH
) &&
1122 (rate
->flags
& IEEE80211_TX_RC_SHORT_GI
))
1123 rix
= rate_table
->info
[rix
].ht_index
;
1124 else if (rate
->flags
& IEEE80211_TX_RC_SHORT_GI
)
1125 rix
= rate_table
->info
[rix
].sgi_index
;
1126 else if (rate
->flags
& IEEE80211_TX_RC_40_MHZ_WIDTH
)
1127 rix
= rate_table
->info
[rix
].cw40index
;
1132 static void ath_rc_tx_status(struct ath_softc
*sc
,
1133 struct ath_rate_priv
*ath_rc_priv
,
1134 struct ieee80211_tx_info
*tx_info
,
1135 int final_ts_idx
, int xretries
, int long_retry
)
1137 const struct ath_rate_table
*rate_table
;
1138 struct ieee80211_tx_rate
*rates
= tx_info
->status
.rates
;
1142 rate_table
= ath_rc_priv
->rate_table
;
1145 * If the first rate is not the final index, there
1146 * are intermediate rate failures to be processed.
1148 if (final_ts_idx
!= 0) {
1149 /* Process intermediate rates that failed.*/
1150 for (i
= 0; i
< final_ts_idx
; i
++) {
1151 if (rates
[i
].count
!= 0 && (rates
[i
].idx
>= 0)) {
1152 flags
= rates
[i
].flags
;
1154 /* If HT40 and we have switched mode from
1155 * 40 to 20 => don't update */
1157 if ((flags
& IEEE80211_TX_RC_40_MHZ_WIDTH
) &&
1158 !(ath_rc_priv
->ht_cap
& WLAN_RC_40_FLAG
))
1161 rix
= ath_rc_get_rateindex(rate_table
, &rates
[i
]);
1162 ath_rc_update_ht(sc
, ath_rc_priv
, tx_info
,
1163 rix
, xretries
? 1 : 2,
1169 * Handle the special case of MIMO PS burst, where the second
1170 * aggregate is sent out with only one rate and one try.
1171 * Treating it as an excessive retry penalizes the rate
1174 if (rates
[0].count
== 1 && xretries
== 1)
1178 flags
= rates
[i
].flags
;
1180 /* If HT40 and we have switched mode from 40 to 20 => don't update */
1181 if ((flags
& IEEE80211_TX_RC_40_MHZ_WIDTH
) &&
1182 !(ath_rc_priv
->ht_cap
& WLAN_RC_40_FLAG
))
1185 rix
= ath_rc_get_rateindex(rate_table
, &rates
[i
]);
1186 ath_rc_update_ht(sc
, ath_rc_priv
, tx_info
, rix
, xretries
, long_retry
);
1190 struct ath_rate_table
*ath_choose_rate_table(struct ath_softc
*sc
,
1191 enum ieee80211_band band
,
1194 struct ath_common
*common
= ath9k_hw_common(sc
->sc_ah
);
1197 case IEEE80211_BAND_2GHZ
:
1199 return &ar5416_11ng_ratetable
;
1200 return &ar5416_11g_ratetable
;
1201 case IEEE80211_BAND_5GHZ
:
1203 return &ar5416_11na_ratetable
;
1204 return &ar5416_11a_ratetable
;
1206 ath_print(common
, ATH_DBG_CONFIG
, "Invalid band\n");
1211 static void ath_rc_init(struct ath_softc
*sc
,
1212 struct ath_rate_priv
*ath_rc_priv
,
1213 struct ieee80211_supported_band
*sband
,
1214 struct ieee80211_sta
*sta
,
1215 const struct ath_rate_table
*rate_table
)
1217 struct ath_rateset
*rateset
= &ath_rc_priv
->neg_rates
;
1218 struct ath_common
*common
= ath9k_hw_common(sc
->sc_ah
);
1219 u8
*ht_mcs
= (u8
*)&ath_rc_priv
->neg_ht_rates
;
1220 u8 i
, j
, k
, hi
= 0, hthi
= 0;
1222 /* Initial rate table size. Will change depending
1223 * on the working rate set */
1224 ath_rc_priv
->rate_table_size
= RATE_TABLE_SIZE
;
1226 /* Initialize thresholds according to the global rate table */
1227 for (i
= 0 ; i
< ath_rc_priv
->rate_table_size
; i
++) {
1228 ath_rc_priv
->per
[i
] = 0;
1231 /* Determine the valid rates */
1232 ath_rc_init_valid_txmask(ath_rc_priv
);
1234 for (i
= 0; i
< WLAN_RC_PHY_MAX
; i
++) {
1235 for (j
= 0; j
< MAX_TX_RATE_PHY
; j
++)
1236 ath_rc_priv
->valid_phy_rateidx
[i
][j
] = 0;
1237 ath_rc_priv
->valid_phy_ratecnt
[i
] = 0;
1240 if (!rateset
->rs_nrates
) {
1241 /* No working rate, just initialize valid rates */
1242 hi
= ath_rc_init_validrates(ath_rc_priv
, rate_table
,
1243 ath_rc_priv
->ht_cap
);
1245 /* Use intersection of working rates and valid rates */
1246 hi
= ath_rc_setvalid_rates(ath_rc_priv
, rate_table
,
1247 rateset
, ath_rc_priv
->ht_cap
);
1248 if (ath_rc_priv
->ht_cap
& WLAN_RC_HT_FLAG
) {
1249 hthi
= ath_rc_setvalid_htrates(ath_rc_priv
,
1252 ath_rc_priv
->ht_cap
);
1254 hi
= A_MAX(hi
, hthi
);
1257 ath_rc_priv
->rate_table_size
= hi
+ 1;
1258 ath_rc_priv
->rate_max_phy
= 0;
1259 BUG_ON(ath_rc_priv
->rate_table_size
> RATE_TABLE_SIZE
);
1261 for (i
= 0, k
= 0; i
< WLAN_RC_PHY_MAX
; i
++) {
1262 for (j
= 0; j
< ath_rc_priv
->valid_phy_ratecnt
[i
]; j
++) {
1263 ath_rc_priv
->valid_rate_index
[k
++] =
1264 ath_rc_priv
->valid_phy_rateidx
[i
][j
];
1267 if (!ath_rc_valid_phyrate(i
, rate_table
->initial_ratemax
, 1)
1268 || !ath_rc_priv
->valid_phy_ratecnt
[i
])
1271 ath_rc_priv
->rate_max_phy
= ath_rc_priv
->valid_phy_rateidx
[i
][j
-1];
1273 BUG_ON(ath_rc_priv
->rate_table_size
> RATE_TABLE_SIZE
);
1274 BUG_ON(k
> RATE_TABLE_SIZE
);
1276 ath_rc_priv
->max_valid_rate
= k
;
1277 ath_rc_sort_validrates(rate_table
, ath_rc_priv
);
1278 ath_rc_priv
->rate_max_phy
= ath_rc_priv
->valid_rate_index
[k
-4];
1279 ath_rc_priv
->rate_table
= rate_table
;
1281 ath_print(common
, ATH_DBG_CONFIG
,
1282 "RC Initialized with capabilities: 0x%x\n",
1283 ath_rc_priv
->ht_cap
);
1286 static u8
ath_rc_build_ht_caps(struct ath_softc
*sc
, struct ieee80211_sta
*sta
,
1287 bool is_cw40
, bool is_sgi
)
1291 if (sta
->ht_cap
.ht_supported
) {
1292 caps
= WLAN_RC_HT_FLAG
;
1293 if (sta
->ht_cap
.mcs
.rx_mask
[1] && sta
->ht_cap
.mcs
.rx_mask
[2])
1294 caps
|= WLAN_RC_TS_FLAG
| WLAN_RC_DS_FLAG
;
1295 else if (sta
->ht_cap
.mcs
.rx_mask
[1])
1296 caps
|= WLAN_RC_DS_FLAG
;
1298 caps
|= WLAN_RC_40_FLAG
;
1300 caps
|= WLAN_RC_SGI_FLAG
;
1306 static bool ath_tx_aggr_check(struct ath_softc
*sc
, struct ath_node
*an
,
1309 struct ath_atx_tid
*txtid
;
1311 if (!(sc
->sc_flags
& SC_OP_TXAGGR
))
1314 txtid
= ATH_AN_2_TID(an
, tidno
);
1316 if (!(txtid
->state
& (AGGR_ADDBA_COMPLETE
| AGGR_ADDBA_PROGRESS
)))
1322 /***********************************/
1323 /* mac80211 Rate Control callbacks */
1324 /***********************************/
1326 static void ath_debug_stat_rc(struct ath_rate_priv
*rc
, int final_rate
)
1328 struct ath_rc_stats
*stats
;
1330 stats
= &rc
->rcstats
[final_rate
];
1335 static void ath_tx_status(void *priv
, struct ieee80211_supported_band
*sband
,
1336 struct ieee80211_sta
*sta
, void *priv_sta
,
1337 struct sk_buff
*skb
)
1339 struct ath_softc
*sc
= priv
;
1340 struct ath_rate_priv
*ath_rc_priv
= priv_sta
;
1341 struct ieee80211_tx_info
*tx_info
= IEEE80211_SKB_CB(skb
);
1342 struct ieee80211_hdr
*hdr
;
1343 int final_ts_idx
= 0, tx_status
= 0, is_underrun
= 0;
1348 hdr
= (struct ieee80211_hdr
*)skb
->data
;
1349 fc
= hdr
->frame_control
;
1350 for (i
= 0; i
< IEEE80211_TX_MAX_RATES
; i
++) {
1351 struct ieee80211_tx_rate
*rate
= &tx_info
->status
.rates
[i
];
1356 long_retry
= rate
->count
- 1;
1359 if (!priv_sta
|| !ieee80211_is_data(fc
))
1362 /* This packet was aggregated but doesn't carry status info */
1363 if ((tx_info
->flags
& IEEE80211_TX_CTL_AMPDU
) &&
1364 !(tx_info
->flags
& IEEE80211_TX_STAT_AMPDU
))
1367 if (tx_info
->flags
& IEEE80211_TX_STAT_TX_FILTERED
)
1370 if (!(tx_info
->flags
& IEEE80211_TX_STAT_AMPDU
)) {
1371 tx_info
->status
.ampdu_ack_len
=
1372 (tx_info
->flags
& IEEE80211_TX_STAT_ACK
? 1 : 0);
1373 tx_info
->status
.ampdu_len
= 1;
1377 * If an underrun error is seen assume it as an excessive retry only
1378 * if max frame trigger level has been reached (2 KB for singel stream,
1379 * and 4 KB for dual stream). Adjust the long retry as if the frame was
1380 * tried hw->max_rate_tries times to affect how ratectrl updates PER for
1381 * the failed rate. In case of congestion on the bus penalizing these
1382 * type of underruns should help hardware actually transmit new frames
1383 * successfully by eventually preferring slower rates. This itself
1384 * should also alleviate congestion on the bus.
1386 if ((tx_info
->pad
[0] & ATH_TX_INFO_UNDERRUN
) &&
1387 (sc
->sc_ah
->tx_trig_level
>= ath_rc_priv
->tx_triglevel_max
)) {
1392 if (tx_info
->pad
[0] & ATH_TX_INFO_XRETRY
)
1395 ath_rc_tx_status(sc
, ath_rc_priv
, tx_info
, final_ts_idx
, tx_status
,
1396 (is_underrun
) ? sc
->hw
->max_rate_tries
: long_retry
);
1398 /* Check if aggregation has to be enabled for this tid */
1399 if (conf_is_ht(&sc
->hw
->conf
) &&
1400 !(skb
->protocol
== cpu_to_be16(ETH_P_PAE
))) {
1401 if (ieee80211_is_data_qos(fc
)) {
1403 struct ath_node
*an
;
1405 qc
= ieee80211_get_qos_ctl(hdr
);
1407 an
= (struct ath_node
*)sta
->drv_priv
;
1409 if(ath_tx_aggr_check(sc
, an
, tid
))
1410 ieee80211_start_tx_ba_session(sta
, tid
);
1414 ath_debug_stat_rc(ath_rc_priv
,
1415 ath_rc_get_rateindex(ath_rc_priv
->rate_table
,
1416 &tx_info
->status
.rates
[final_ts_idx
]));
1419 static void ath_rate_init(void *priv
, struct ieee80211_supported_band
*sband
,
1420 struct ieee80211_sta
*sta
, void *priv_sta
)
1422 struct ath_softc
*sc
= priv
;
1423 struct ath_rate_priv
*ath_rc_priv
= priv_sta
;
1424 const struct ath_rate_table
*rate_table
;
1425 bool is_cw40
, is_sgi
= false;
1428 for (i
= 0; i
< sband
->n_bitrates
; i
++) {
1429 if (sta
->supp_rates
[sband
->band
] & BIT(i
)) {
1430 ath_rc_priv
->neg_rates
.rs_rates
[j
]
1431 = (sband
->bitrates
[i
].bitrate
* 2) / 10;
1435 ath_rc_priv
->neg_rates
.rs_nrates
= j
;
1437 if (sta
->ht_cap
.ht_supported
) {
1438 for (i
= 0, j
= 0; i
< 77; i
++) {
1439 if (sta
->ht_cap
.mcs
.rx_mask
[i
/8] & (1<<(i
%8)))
1440 ath_rc_priv
->neg_ht_rates
.rs_rates
[j
++] = i
;
1441 if (j
== ATH_RATE_MAX
)
1444 ath_rc_priv
->neg_ht_rates
.rs_nrates
= j
;
1447 is_cw40
= sta
->ht_cap
.cap
& IEEE80211_HT_CAP_SUP_WIDTH_20_40
;
1450 is_sgi
= sta
->ht_cap
.cap
& IEEE80211_HT_CAP_SGI_40
;
1451 else if (sc
->sc_ah
->caps
.hw_caps
& ATH9K_HW_CAP_SGI_20
)
1452 is_sgi
= sta
->ht_cap
.cap
& IEEE80211_HT_CAP_SGI_20
;
1454 /* Choose rate table first */
1456 rate_table
= ath_choose_rate_table(sc
, sband
->band
,
1457 sta
->ht_cap
.ht_supported
);
1459 ath_rc_priv
->ht_cap
= ath_rc_build_ht_caps(sc
, sta
, is_cw40
, is_sgi
);
1460 ath_rc_init(sc
, priv_sta
, sband
, sta
, rate_table
);
1463 static void ath_rate_update(void *priv
, struct ieee80211_supported_band
*sband
,
1464 struct ieee80211_sta
*sta
, void *priv_sta
,
1465 u32 changed
, enum nl80211_channel_type oper_chan_type
)
1467 struct ath_softc
*sc
= priv
;
1468 struct ath_rate_priv
*ath_rc_priv
= priv_sta
;
1469 const struct ath_rate_table
*rate_table
= NULL
;
1470 bool oper_cw40
= false, oper_sgi
;
1471 bool local_cw40
= (ath_rc_priv
->ht_cap
& WLAN_RC_40_FLAG
) ?
1473 bool local_sgi
= (ath_rc_priv
->ht_cap
& WLAN_RC_SGI_FLAG
) ?
1476 /* FIXME: Handle AP mode later when we support CWM */
1478 if (changed
& IEEE80211_RC_HT_CHANGED
) {
1479 if (sc
->sc_ah
->opmode
!= NL80211_IFTYPE_STATION
)
1482 if (oper_chan_type
== NL80211_CHAN_HT40MINUS
||
1483 oper_chan_type
== NL80211_CHAN_HT40PLUS
)
1487 oper_sgi
= (sta
->ht_cap
.cap
& IEEE80211_HT_CAP_SGI_40
) ?
1489 else if (sc
->sc_ah
->caps
.hw_caps
& ATH9K_HW_CAP_SGI_20
)
1490 oper_sgi
= (sta
->ht_cap
.cap
& IEEE80211_HT_CAP_SGI_20
) ?
1495 if ((local_cw40
!= oper_cw40
) || (local_sgi
!= oper_sgi
)) {
1496 rate_table
= ath_choose_rate_table(sc
, sband
->band
,
1497 sta
->ht_cap
.ht_supported
);
1498 ath_rc_priv
->ht_cap
= ath_rc_build_ht_caps(sc
, sta
,
1499 oper_cw40
, oper_sgi
);
1500 ath_rc_init(sc
, priv_sta
, sband
, sta
, rate_table
);
1502 ath_print(ath9k_hw_common(sc
->sc_ah
), ATH_DBG_CONFIG
,
1503 "Operating HT Bandwidth changed to: %d\n",
1504 sc
->hw
->conf
.channel_type
);
1509 #ifdef CONFIG_ATH9K_DEBUGFS
1511 static int ath9k_debugfs_open(struct inode
*inode
, struct file
*file
)
1513 file
->private_data
= inode
->i_private
;
1517 static ssize_t
read_file_rcstat(struct file
*file
, char __user
*user_buf
,
1518 size_t count
, loff_t
*ppos
)
1520 struct ath_rate_priv
*rc
= file
->private_data
;
1522 unsigned int len
= 0, max
;
1526 if (rc
->rate_table
== NULL
)
1529 max
= 80 + rc
->rate_table
->rate_cnt
* 1024 + 1;
1530 buf
= kmalloc(max
, GFP_KERNEL
);
1534 len
+= sprintf(buf
, "%6s %6s %6s "
1535 "%10s %10s %10s %10s\n",
1536 "HT", "MCS", "Rate",
1537 "Success", "Retries", "XRetries", "PER");
1539 for (i
= 0; i
< rc
->rate_table
->rate_cnt
; i
++) {
1540 u32 ratekbps
= rc
->rate_table
->info
[i
].ratekbps
;
1541 struct ath_rc_stats
*stats
= &rc
->rcstats
[i
];
1544 int used_mcs
= 0, used_htmode
= 0;
1546 if (WLAN_RC_PHY_HT(rc
->rate_table
->info
[i
].phy
)) {
1547 used_mcs
= snprintf(mcs
, 5, "%d",
1548 rc
->rate_table
->info
[i
].ratecode
);
1550 if (WLAN_RC_PHY_40(rc
->rate_table
->info
[i
].phy
))
1551 used_htmode
= snprintf(htmode
, 5, "HT40");
1552 else if (WLAN_RC_PHY_20(rc
->rate_table
->info
[i
].phy
))
1553 used_htmode
= snprintf(htmode
, 5, "HT20");
1555 used_htmode
= snprintf(htmode
, 5, "????");
1558 mcs
[used_mcs
] = '\0';
1559 htmode
[used_htmode
] = '\0';
1561 len
+= snprintf(buf
+ len
, max
- len
,
1563 "%10u %10u %10u %10u\n",
1567 (ratekbps
% 1000) / 100,
1577 retval
= simple_read_from_buffer(user_buf
, count
, ppos
, buf
, len
);
1582 static const struct file_operations fops_rcstat
= {
1583 .read
= read_file_rcstat
,
1584 .open
= ath9k_debugfs_open
,
1585 .owner
= THIS_MODULE
1588 static void ath_rate_add_sta_debugfs(void *priv
, void *priv_sta
,
1591 struct ath_rate_priv
*rc
= priv_sta
;
1592 debugfs_create_file("rc_stats", S_IRUGO
, dir
, rc
, &fops_rcstat
);
1595 #endif /* CONFIG_ATH9K_DEBUGFS */
1597 static void *ath_rate_alloc(struct ieee80211_hw
*hw
, struct dentry
*debugfsdir
)
1599 struct ath_wiphy
*aphy
= hw
->priv
;
1603 static void ath_rate_free(void *priv
)
1608 static void *ath_rate_alloc_sta(void *priv
, struct ieee80211_sta
*sta
, gfp_t gfp
)
1610 struct ath_softc
*sc
= priv
;
1611 struct ath_rate_priv
*rate_priv
;
1613 rate_priv
= kzalloc(sizeof(struct ath_rate_priv
), gfp
);
1615 ath_print(ath9k_hw_common(sc
->sc_ah
), ATH_DBG_FATAL
,
1616 "Unable to allocate private rc structure\n");
1620 rate_priv
->tx_triglevel_max
= sc
->sc_ah
->caps
.tx_triglevel_max
;
1625 static void ath_rate_free_sta(void *priv
, struct ieee80211_sta
*sta
,
1628 struct ath_rate_priv
*rate_priv
= priv_sta
;
1632 static struct rate_control_ops ath_rate_ops
= {
1634 .name
= "ath9k_rate_control",
1635 .tx_status
= ath_tx_status
,
1636 .get_rate
= ath_get_rate
,
1637 .rate_init
= ath_rate_init
,
1638 .rate_update
= ath_rate_update
,
1639 .alloc
= ath_rate_alloc
,
1640 .free
= ath_rate_free
,
1641 .alloc_sta
= ath_rate_alloc_sta
,
1642 .free_sta
= ath_rate_free_sta
,
1643 #ifdef CONFIG_ATH9K_DEBUGFS
1644 .add_sta_debugfs
= ath_rate_add_sta_debugfs
,
1648 int ath_rate_control_register(void)
1650 return ieee80211_rate_control_register(&ath_rate_ops
);
1653 void ath_rate_control_unregister(void)
1655 ieee80211_rate_control_unregister(&ath_rate_ops
);