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.
20 static const struct ath_rate_table ar5416_11na_ratetable
= {
23 { VALID
, VALID
, WLAN_RC_PHY_OFDM
, 6000, /* 6 Mb */
25 0, 2, 1, 0, 0, 0, 0, 0 },
26 { VALID
, VALID
, WLAN_RC_PHY_OFDM
, 9000, /* 9 Mb */
28 0, 3, 1, 1, 1, 1, 1, 0 },
29 { VALID
, VALID
, WLAN_RC_PHY_OFDM
, 12000, /* 12 Mb */
30 10000, 0x0a, 0x00, 24,
31 2, 4, 2, 2, 2, 2, 2, 0 },
32 { VALID
, VALID
, WLAN_RC_PHY_OFDM
, 18000, /* 18 Mb */
33 13900, 0x0e, 0x00, 36,
34 2, 6, 2, 3, 3, 3, 3, 0 },
35 { VALID
, VALID
, WLAN_RC_PHY_OFDM
, 24000, /* 24 Mb */
36 17300, 0x09, 0x00, 48,
37 4, 10, 3, 4, 4, 4, 4, 0 },
38 { VALID
, VALID
, WLAN_RC_PHY_OFDM
, 36000, /* 36 Mb */
39 23000, 0x0d, 0x00, 72,
40 4, 14, 3, 5, 5, 5, 5, 0 },
41 { VALID
, VALID
, WLAN_RC_PHY_OFDM
, 48000, /* 48 Mb */
42 27400, 0x08, 0x00, 96,
43 4, 20, 3, 6, 6, 6, 6, 0 },
44 { VALID
, VALID
, WLAN_RC_PHY_OFDM
, 54000, /* 54 Mb */
45 29300, 0x0c, 0x00, 108,
46 4, 23, 3, 7, 7, 7, 7, 0 },
47 { VALID_20
, VALID_20
, WLAN_RC_PHY_HT_20_SS
, 6500, /* 6.5 Mb */
49 0, 2, 3, 8, 24, 8, 24, 3216 },
50 { VALID_20
, VALID_20
, WLAN_RC_PHY_HT_20_SS
, 13000, /* 13 Mb */
52 2, 4, 3, 9, 25, 9, 25, 6434 },
53 { VALID_20
, VALID_20
, WLAN_RC_PHY_HT_20_SS
, 19500, /* 19.5 Mb */
55 2, 6, 3, 10, 26, 10, 26, 9650 },
56 { VALID_20
, VALID_20
, WLAN_RC_PHY_HT_20_SS
, 26000, /* 26 Mb */
58 4, 10, 3, 11, 27, 11, 27, 12868 },
59 { VALID_20
, VALID_20
, WLAN_RC_PHY_HT_20_SS
, 39000, /* 39 Mb */
61 4, 14, 3, 12, 28, 12, 28, 19304 },
62 { INVALID
, VALID_20
, WLAN_RC_PHY_HT_20_SS
, 52000, /* 52 Mb */
64 4, 20, 3, 13, 29, 13, 29, 25740 },
65 { INVALID
, VALID_20
, WLAN_RC_PHY_HT_20_SS
, 58500, /* 58.5 Mb */
67 4, 23, 3, 14, 30, 14, 30, 28956 },
68 { INVALID
, VALID_20
, WLAN_RC_PHY_HT_20_SS
, 65000, /* 65 Mb */
70 4, 25, 3, 15, 31, 15, 32, 32180 },
71 { INVALID
, INVALID
, WLAN_RC_PHY_HT_20_DS
, 13000, /* 13 Mb */
73 8, 0, 2, 3, 16, 33, 16, 33, 6430 },
74 { INVALID
, INVALID
, WLAN_RC_PHY_HT_20_DS
, 26000, /* 26 Mb */
76 2, 4, 3, 17, 34, 17, 34, 12860 },
77 { INVALID
, INVALID
, WLAN_RC_PHY_HT_20_DS
, 39000, /* 39 Mb */
78 36600, 0x8a, 0x00, 10,
79 2, 6, 3, 18, 35, 18, 35, 19300 },
80 { VALID_20
, INVALID
, WLAN_RC_PHY_HT_20_DS
, 52000, /* 52 Mb */
81 48100, 0x8b, 0x00, 11,
82 4, 10, 3, 19, 36, 19, 36, 25736 },
83 { VALID_20
, INVALID
, WLAN_RC_PHY_HT_20_DS
, 78000, /* 78 Mb */
84 69500, 0x8c, 0x00, 12,
85 4, 14, 3, 20, 37, 20, 37, 38600 },
86 { VALID_20
, INVALID
, WLAN_RC_PHY_HT_20_DS
, 104000, /* 104 Mb */
87 89500, 0x8d, 0x00, 13,
88 4, 20, 3, 21, 38, 21, 38, 51472 },
89 { VALID_20
, INVALID
, WLAN_RC_PHY_HT_20_DS
, 117000, /* 117 Mb */
90 98900, 0x8e, 0x00, 14,
91 4, 23, 3, 22, 39, 22, 39, 57890 },
92 { VALID_20
, INVALID
, WLAN_RC_PHY_HT_20_DS
, 130000, /* 130 Mb */
93 108300, 0x8f, 0x00, 15,
94 4, 25, 3, 23, 40, 23, 41, 64320 },
95 { VALID_40
, VALID_40
, WLAN_RC_PHY_HT_40_SS
, 13500, /* 13.5 Mb */
97 0, 2, 3, 8, 24, 24, 24, 6684 },
98 { VALID_40
, VALID_40
, WLAN_RC_PHY_HT_40_SS
, 27500, /* 27.0 Mb */
100 2, 4, 3, 9, 25, 25, 25, 13368 },
101 { VALID_40
, VALID_40
, WLAN_RC_PHY_HT_40_SS
, 40500, /* 40.5 Mb */
102 38600, 0x82, 0x00, 2,
103 2, 6, 3, 10, 26, 26, 26, 20052 },
104 { VALID_40
, VALID_40
, WLAN_RC_PHY_HT_40_SS
, 54000, /* 54 Mb */
105 49800, 0x83, 0x00, 3,
106 4, 10, 3, 11, 27, 27, 27, 26738 },
107 { VALID_40
, VALID_40
, WLAN_RC_PHY_HT_40_SS
, 81500, /* 81 Mb */
108 72200, 0x84, 0x00, 4,
109 4, 14, 3, 12, 28, 28, 28, 40104 },
110 { INVALID
, VALID_40
, WLAN_RC_PHY_HT_40_SS
, 108000, /* 108 Mb */
111 92900, 0x85, 0x00, 5,
112 4, 20, 3, 13, 29, 29, 29, 53476 },
113 { INVALID
, VALID_40
, WLAN_RC_PHY_HT_40_SS
, 121500, /* 121.5 Mb */
114 102700, 0x86, 0x00, 6,
115 4, 23, 3, 14, 30, 30, 30, 60156 },
116 { INVALID
, VALID_40
, WLAN_RC_PHY_HT_40_SS
, 135000, /* 135 Mb */
117 112000, 0x87, 0x00, 7,
118 4, 25, 3, 15, 31, 32, 32, 66840 },
119 { INVALID
, VALID_40
, WLAN_RC_PHY_HT_40_SS_HGI
, 150000, /* 150 Mb */
120 122000, 0x87, 0x00, 7,
121 4, 25, 3, 15, 31, 32, 32, 74200 },
122 { INVALID
, INVALID
, WLAN_RC_PHY_HT_40_DS
, 27000, /* 27 Mb */
123 25800, 0x88, 0x00, 8,
124 0, 2, 3, 16, 33, 33, 33, 13360 },
125 { INVALID
, INVALID
, WLAN_RC_PHY_HT_40_DS
, 54000, /* 54 Mb */
126 49800, 0x89, 0x00, 9,
127 2, 4, 3, 17, 34, 34, 34, 26720 },
128 { INVALID
, INVALID
, WLAN_RC_PHY_HT_40_DS
, 81000, /* 81 Mb */
129 71900, 0x8a, 0x00, 10,
130 2, 6, 3, 18, 35, 35, 35, 40080 },
131 { VALID_40
, INVALID
, WLAN_RC_PHY_HT_40_DS
, 108000, /* 108 Mb */
132 92500, 0x8b, 0x00, 11,
133 4, 10, 3, 19, 36, 36, 36, 53440 },
134 { VALID_40
, INVALID
, WLAN_RC_PHY_HT_40_DS
, 162000, /* 162 Mb */
135 130300, 0x8c, 0x00, 12,
136 4, 14, 3, 20, 37, 37, 37, 80160 },
137 { VALID_40
, INVALID
, WLAN_RC_PHY_HT_40_DS
, 216000, /* 216 Mb */
138 162800, 0x8d, 0x00, 13,
139 4, 20, 3, 21, 38, 38, 38, 106880 },
140 { VALID_40
, INVALID
, WLAN_RC_PHY_HT_40_DS
, 243000, /* 243 Mb */
141 178200, 0x8e, 0x00, 14,
142 4, 23, 3, 22, 39, 39, 39, 120240 },
143 { VALID_40
, INVALID
, WLAN_RC_PHY_HT_40_DS
, 270000, /* 270 Mb */
144 192100, 0x8f, 0x00, 15,
145 4, 25, 3, 23, 40, 41, 41, 133600 },
146 { VALID_40
, INVALID
, WLAN_RC_PHY_HT_40_DS_HGI
, 300000, /* 300 Mb */
147 207000, 0x8f, 0x00, 15,
148 4, 25, 3, 23, 40, 41, 41, 148400 },
150 50, /* probe interval */
151 50, /* rssi reduce interval */
152 WLAN_RC_HT_FLAG
, /* Phy rates allowed initially */
155 /* 4ms frame limit not used for NG mode. The values filled
156 * for HT are the 64K max aggregate limit */
158 static const struct ath_rate_table ar5416_11ng_ratetable
= {
161 { VALID_ALL
, VALID_ALL
, WLAN_RC_PHY_CCK
, 1000, /* 1 Mb */
163 0, 0, 1, 0, 0, 0, 0, 0 },
164 { VALID_ALL
, VALID_ALL
, WLAN_RC_PHY_CCK
, 2000, /* 2 Mb */
166 1, 1, 1, 1, 1, 1, 1, 0 },
167 { VALID_ALL
, VALID_ALL
, WLAN_RC_PHY_CCK
, 5500, /* 5.5 Mb */
168 4900, 0x19, 0x04, 11,
169 2, 2, 2, 2, 2, 2, 2, 0 },
170 { VALID_ALL
, VALID_ALL
, WLAN_RC_PHY_CCK
, 11000, /* 11 Mb */
171 8100, 0x18, 0x04, 22,
172 3, 3, 2, 3, 3, 3, 3, 0 },
173 { INVALID
, INVALID
, WLAN_RC_PHY_OFDM
, 6000, /* 6 Mb */
174 5400, 0x0b, 0x00, 12,
175 4, 2, 1, 4, 4, 4, 4, 0 },
176 { INVALID
, INVALID
, WLAN_RC_PHY_OFDM
, 9000, /* 9 Mb */
177 7800, 0x0f, 0x00, 18,
178 4, 3, 1, 5, 5, 5, 5, 0 },
179 { VALID
, VALID
, WLAN_RC_PHY_OFDM
, 12000, /* 12 Mb */
180 10100, 0x0a, 0x00, 24,
181 6, 4, 1, 6, 6, 6, 6, 0 },
182 { VALID
, VALID
, WLAN_RC_PHY_OFDM
, 18000, /* 18 Mb */
183 14100, 0x0e, 0x00, 36,
184 6, 6, 2, 7, 7, 7, 7, 0 },
185 { VALID
, VALID
, WLAN_RC_PHY_OFDM
, 24000, /* 24 Mb */
186 17700, 0x09, 0x00, 48,
187 8, 10, 3, 8, 8, 8, 8, 0 },
188 { VALID
, VALID
, WLAN_RC_PHY_OFDM
, 36000, /* 36 Mb */
189 23700, 0x0d, 0x00, 72,
190 8, 14, 3, 9, 9, 9, 9, 0 },
191 { VALID
, VALID
, WLAN_RC_PHY_OFDM
, 48000, /* 48 Mb */
192 27400, 0x08, 0x00, 96,
193 8, 20, 3, 10, 10, 10, 10, 0 },
194 { VALID
, VALID
, WLAN_RC_PHY_OFDM
, 54000, /* 54 Mb */
195 30900, 0x0c, 0x00, 108,
196 8, 23, 3, 11, 11, 11, 11, 0 },
197 { INVALID
, INVALID
, WLAN_RC_PHY_HT_20_SS
, 6500, /* 6.5 Mb */
199 4, 2, 3, 12, 28, 12, 28, 3216 },
200 { VALID_20
, VALID_20
, WLAN_RC_PHY_HT_20_SS
, 13000, /* 13 Mb */
201 12700, 0x81, 0x00, 1,
202 6, 4, 3, 13, 29, 13, 29, 6434 },
203 { VALID_20
, VALID_20
, WLAN_RC_PHY_HT_20_SS
, 19500, /* 19.5 Mb */
204 18800, 0x82, 0x00, 2,
205 6, 6, 3, 14, 30, 14, 30, 9650 },
206 { VALID_20
, VALID_20
, WLAN_RC_PHY_HT_20_SS
, 26000, /* 26 Mb */
207 25000, 0x83, 0x00, 3,
208 8, 10, 3, 15, 31, 15, 31, 12868 },
209 { VALID_20
, VALID_20
, WLAN_RC_PHY_HT_20_SS
, 39000, /* 39 Mb */
210 36700, 0x84, 0x00, 4,
211 8, 14, 3, 16, 32, 16, 32, 19304 },
212 { INVALID
, VALID_20
, WLAN_RC_PHY_HT_20_SS
, 52000, /* 52 Mb */
213 48100, 0x85, 0x00, 5,
214 8, 20, 3, 17, 33, 17, 33, 25740 },
215 { INVALID
, VALID_20
, WLAN_RC_PHY_HT_20_SS
, 58500, /* 58.5 Mb */
216 53500, 0x86, 0x00, 6,
217 8, 23, 3, 18, 34, 18, 34, 28956 },
218 { INVALID
, VALID_20
, WLAN_RC_PHY_HT_20_SS
, 65000, /* 65 Mb */
219 59000, 0x87, 0x00, 7,
220 8, 25, 3, 19, 35, 19, 36, 32180 },
221 { INVALID
, INVALID
, WLAN_RC_PHY_HT_20_DS
, 13000, /* 13 Mb */
222 12700, 0x88, 0x00, 8,
223 4, 2, 3, 20, 37, 20, 37, 6430 },
224 { INVALID
, INVALID
, WLAN_RC_PHY_HT_20_DS
, 26000, /* 26 Mb */
225 24800, 0x89, 0x00, 9,
226 6, 4, 3, 21, 38, 21, 38, 12860 },
227 { INVALID
, INVALID
, WLAN_RC_PHY_HT_20_DS
, 39000, /* 39 Mb */
228 36600, 0x8a, 0x00, 10,
229 6, 6, 3, 22, 39, 22, 39, 19300 },
230 { VALID_20
, INVALID
, WLAN_RC_PHY_HT_20_DS
, 52000, /* 52 Mb */
231 48100, 0x8b, 0x00, 11,
232 8, 10, 3, 23, 40, 23, 40, 25736 },
233 { VALID_20
, INVALID
, WLAN_RC_PHY_HT_20_DS
, 78000, /* 78 Mb */
234 69500, 0x8c, 0x00, 12,
235 8, 14, 3, 24, 41, 24, 41, 38600 },
236 { VALID_20
, INVALID
, WLAN_RC_PHY_HT_20_DS
, 104000, /* 104 Mb */
237 89500, 0x8d, 0x00, 13,
238 8, 20, 3, 25, 42, 25, 42, 51472 },
239 { VALID_20
, INVALID
, WLAN_RC_PHY_HT_20_DS
, 117000, /* 117 Mb */
240 98900, 0x8e, 0x00, 14,
241 8, 23, 3, 26, 43, 26, 44, 57890 },
242 { VALID_20
, INVALID
, WLAN_RC_PHY_HT_20_DS
, 130000, /* 130 Mb */
243 108300, 0x8f, 0x00, 15,
244 8, 25, 3, 27, 44, 27, 45, 64320 },
245 { VALID_40
, VALID_40
, WLAN_RC_PHY_HT_40_SS
, 13500, /* 13.5 Mb */
246 13200, 0x80, 0x00, 0,
247 8, 2, 3, 12, 28, 28, 28, 6684 },
248 { VALID_40
, VALID_40
, WLAN_RC_PHY_HT_40_SS
, 27500, /* 27.0 Mb */
249 25900, 0x81, 0x00, 1,
250 8, 4, 3, 13, 29, 29, 29, 13368 },
251 { VALID_40
, VALID_40
, WLAN_RC_PHY_HT_40_SS
, 40500, /* 40.5 Mb */
252 38600, 0x82, 0x00, 2,
253 8, 6, 3, 14, 30, 30, 30, 20052 },
254 { VALID_40
, VALID_40
, WLAN_RC_PHY_HT_40_SS
, 54000, /* 54 Mb */
255 49800, 0x83, 0x00, 3,
256 8, 10, 3, 15, 31, 31, 31, 26738 },
257 { VALID_40
, VALID_40
, WLAN_RC_PHY_HT_40_SS
, 81500, /* 81 Mb */
258 72200, 0x84, 0x00, 4,
259 8, 14, 3, 16, 32, 32, 32, 40104 },
260 { INVALID
, VALID_40
, WLAN_RC_PHY_HT_40_SS
, 108000, /* 108 Mb */
261 92900, 0x85, 0x00, 5,
262 8, 20, 3, 17, 33, 33, 33, 53476 },
263 { INVALID
, VALID_40
, WLAN_RC_PHY_HT_40_SS
, 121500, /* 121.5 Mb */
264 102700, 0x86, 0x00, 6,
265 8, 23, 3, 18, 34, 34, 34, 60156 },
266 { INVALID
, VALID_40
, WLAN_RC_PHY_HT_40_SS
, 135000, /* 135 Mb */
267 112000, 0x87, 0x00, 7,
268 8, 23, 3, 19, 35, 36, 36, 66840 },
269 { INVALID
, VALID_40
, WLAN_RC_PHY_HT_40_SS_HGI
, 150000, /* 150 Mb */
270 122000, 0x87, 0x00, 7,
271 8, 25, 3, 19, 35, 36, 36, 74200 },
272 { INVALID
, INVALID
, WLAN_RC_PHY_HT_40_DS
, 27000, /* 27 Mb */
273 25800, 0x88, 0x00, 8,
274 8, 2, 3, 20, 37, 37, 37, 13360 },
275 { INVALID
, INVALID
, WLAN_RC_PHY_HT_40_DS
, 54000, /* 54 Mb */
276 49800, 0x89, 0x00, 9,
277 8, 4, 3, 21, 38, 38, 38, 26720 },
278 { INVALID
, INVALID
, WLAN_RC_PHY_HT_40_DS
, 81000, /* 81 Mb */
279 71900, 0x8a, 0x00, 10,
280 8, 6, 3, 22, 39, 39, 39, 40080 },
281 { VALID_40
, INVALID
, WLAN_RC_PHY_HT_40_DS
, 108000, /* 108 Mb */
282 92500, 0x8b, 0x00, 11,
283 8, 10, 3, 23, 40, 40, 40, 53440 },
284 { VALID_40
, INVALID
, WLAN_RC_PHY_HT_40_DS
, 162000, /* 162 Mb */
285 130300, 0x8c, 0x00, 12,
286 8, 14, 3, 24, 41, 41, 41, 80160 },
287 { VALID_40
, INVALID
, WLAN_RC_PHY_HT_40_DS
, 216000, /* 216 Mb */
288 162800, 0x8d, 0x00, 13,
289 8, 20, 3, 25, 42, 42, 42, 106880 },
290 { VALID_40
, INVALID
, WLAN_RC_PHY_HT_40_DS
, 243000, /* 243 Mb */
291 178200, 0x8e, 0x00, 14,
292 8, 23, 3, 26, 43, 43, 43, 120240 },
293 { VALID_40
, INVALID
, WLAN_RC_PHY_HT_40_DS
, 270000, /* 270 Mb */
294 192100, 0x8f, 0x00, 15,
295 8, 23, 3, 27, 44, 45, 45, 133600 },
296 { VALID_40
, INVALID
, WLAN_RC_PHY_HT_40_DS_HGI
, 300000, /* 300 Mb */
297 207000, 0x8f, 0x00, 15,
298 8, 25, 3, 27, 44, 45, 45, 148400 },
300 50, /* probe interval */
301 50, /* rssi reduce interval */
302 WLAN_RC_HT_FLAG
, /* Phy rates allowed initially */
305 static const struct ath_rate_table ar5416_11a_ratetable
= {
308 { VALID
, VALID
, WLAN_RC_PHY_OFDM
, 6000, /* 6 Mb */
309 5400, 0x0b, 0x00, (0x80|12),
311 { VALID
, VALID
, WLAN_RC_PHY_OFDM
, 9000, /* 9 Mb */
312 7800, 0x0f, 0x00, 18,
314 { VALID
, VALID
, WLAN_RC_PHY_OFDM
, 12000, /* 12 Mb */
315 10000, 0x0a, 0x00, (0x80|24),
317 { VALID
, VALID
, WLAN_RC_PHY_OFDM
, 18000, /* 18 Mb */
318 13900, 0x0e, 0x00, 36,
320 { VALID
, VALID
, WLAN_RC_PHY_OFDM
, 24000, /* 24 Mb */
321 17300, 0x09, 0x00, (0x80|48),
323 { VALID
, VALID
, WLAN_RC_PHY_OFDM
, 36000, /* 36 Mb */
324 23000, 0x0d, 0x00, 72,
326 { VALID
, VALID
, WLAN_RC_PHY_OFDM
, 48000, /* 48 Mb */
327 27400, 0x08, 0x00, 96,
329 { VALID
, VALID
, WLAN_RC_PHY_OFDM
, 54000, /* 54 Mb */
330 29300, 0x0c, 0x00, 108,
333 50, /* probe interval */
334 50, /* rssi reduce interval */
335 0, /* Phy rates allowed initially */
338 static const struct ath_rate_table ar5416_11g_ratetable
= {
341 { VALID
, VALID
, WLAN_RC_PHY_CCK
, 1000, /* 1 Mb */
344 { VALID
, VALID
, WLAN_RC_PHY_CCK
, 2000, /* 2 Mb */
347 { VALID
, VALID
, WLAN_RC_PHY_CCK
, 5500, /* 5.5 Mb */
348 4900, 0x19, 0x04, 11,
350 { VALID
, VALID
, WLAN_RC_PHY_CCK
, 11000, /* 11 Mb */
351 8100, 0x18, 0x04, 22,
353 { INVALID
, INVALID
, WLAN_RC_PHY_OFDM
, 6000, /* 6 Mb */
354 5400, 0x0b, 0x00, 12,
356 { INVALID
, INVALID
, WLAN_RC_PHY_OFDM
, 9000, /* 9 Mb */
357 7800, 0x0f, 0x00, 18,
359 { VALID
, VALID
, WLAN_RC_PHY_OFDM
, 12000, /* 12 Mb */
360 10000, 0x0a, 0x00, 24,
362 { VALID
, VALID
, WLAN_RC_PHY_OFDM
, 18000, /* 18 Mb */
363 13900, 0x0e, 0x00, 36,
365 { VALID
, VALID
, WLAN_RC_PHY_OFDM
, 24000, /* 24 Mb */
366 17300, 0x09, 0x00, 48,
368 { VALID
, VALID
, WLAN_RC_PHY_OFDM
, 36000, /* 36 Mb */
369 23000, 0x0d, 0x00, 72,
371 { VALID
, VALID
, WLAN_RC_PHY_OFDM
, 48000, /* 48 Mb */
372 27400, 0x08, 0x00, 96,
374 { VALID
, VALID
, WLAN_RC_PHY_OFDM
, 54000, /* 54 Mb */
375 29300, 0x0c, 0x00, 108,
378 50, /* probe interval */
379 50, /* rssi reduce interval */
380 0, /* Phy rates allowed initially */
383 static const struct ath_rate_table ar5416_11b_ratetable
= {
386 { VALID
, VALID
, WLAN_RC_PHY_CCK
, 1000, /* 1 Mb */
387 900, 0x1b, 0x00, (0x80|2),
389 { VALID
, VALID
, WLAN_RC_PHY_CCK
, 2000, /* 2 Mb */
390 1800, 0x1a, 0x04, (0x80|4),
392 { VALID
, VALID
, WLAN_RC_PHY_CCK
, 5500, /* 5.5 Mb */
393 4300, 0x19, 0x04, (0x80|11),
395 { VALID
, VALID
, WLAN_RC_PHY_CCK
, 11000, /* 11 Mb */
396 7100, 0x18, 0x04, (0x80|22),
399 100, /* probe interval */
400 100, /* rssi reduce interval */
401 0, /* Phy rates allowed initially */
404 static inline int8_t median(int8_t a
, int8_t b
, int8_t c
)
423 static void ath_rc_sort_validrates(const struct ath_rate_table
*rate_table
,
424 struct ath_rate_priv
*ath_rc_priv
)
426 u8 i
, j
, idx
, idx_next
;
428 for (i
= ath_rc_priv
->max_valid_rate
- 1; i
> 0; i
--) {
429 for (j
= 0; j
<= i
-1; j
++) {
430 idx
= ath_rc_priv
->valid_rate_index
[j
];
431 idx_next
= ath_rc_priv
->valid_rate_index
[j
+1];
433 if (rate_table
->info
[idx
].ratekbps
>
434 rate_table
->info
[idx_next
].ratekbps
) {
435 ath_rc_priv
->valid_rate_index
[j
] = idx_next
;
436 ath_rc_priv
->valid_rate_index
[j
+1] = idx
;
442 static void ath_rc_init_valid_txmask(struct ath_rate_priv
*ath_rc_priv
)
446 for (i
= 0; i
< ath_rc_priv
->rate_table_size
; i
++)
447 ath_rc_priv
->valid_rate_index
[i
] = 0;
450 static inline void ath_rc_set_valid_txmask(struct ath_rate_priv
*ath_rc_priv
,
451 u8 index
, int valid_tx_rate
)
453 ASSERT(index
<= ath_rc_priv
->rate_table_size
);
454 ath_rc_priv
->valid_rate_index
[index
] = valid_tx_rate
? 1 : 0;
457 static inline int ath_rc_isvalid_txmask(struct ath_rate_priv
*ath_rc_priv
,
460 ASSERT(index
<= ath_rc_priv
->rate_table_size
);
461 return ath_rc_priv
->valid_rate_index
[index
];
465 int ath_rc_get_nextvalid_txrate(const struct ath_rate_table
*rate_table
,
466 struct ath_rate_priv
*ath_rc_priv
,
472 for (i
= 0; i
< ath_rc_priv
->max_valid_rate
- 1; i
++) {
473 if (ath_rc_priv
->valid_rate_index
[i
] == cur_valid_txrate
) {
474 *next_idx
= ath_rc_priv
->valid_rate_index
[i
+1];
479 /* No more valid rates */
485 /* Return true only for single stream */
487 static int ath_rc_valid_phyrate(u32 phy
, u32 capflag
, int ignore_cw
)
489 if (WLAN_RC_PHY_HT(phy
) && !(capflag
& WLAN_RC_HT_FLAG
))
491 if (WLAN_RC_PHY_DS(phy
) && !(capflag
& WLAN_RC_DS_FLAG
))
493 if (WLAN_RC_PHY_SGI(phy
) && !(capflag
& WLAN_RC_SGI_FLAG
))
495 if (!ignore_cw
&& WLAN_RC_PHY_HT(phy
))
496 if (WLAN_RC_PHY_40(phy
) && !(capflag
& WLAN_RC_40_FLAG
))
498 if (!WLAN_RC_PHY_40(phy
) && (capflag
& WLAN_RC_40_FLAG
))
504 ath_rc_get_nextlowervalid_txrate(const struct ath_rate_table
*rate_table
,
505 struct ath_rate_priv
*ath_rc_priv
,
506 u8 cur_valid_txrate
, u8
*next_idx
)
510 for (i
= 1; i
< ath_rc_priv
->max_valid_rate
; i
++) {
511 if (ath_rc_priv
->valid_rate_index
[i
] == cur_valid_txrate
) {
512 *next_idx
= ath_rc_priv
->valid_rate_index
[i
-1];
520 static u8
ath_rc_init_validrates(struct ath_rate_priv
*ath_rc_priv
,
521 const struct ath_rate_table
*rate_table
,
527 for (i
= 0; i
< rate_table
->rate_cnt
; i
++) {
528 valid
= (!(ath_rc_priv
->ht_cap
& WLAN_RC_DS_FLAG
) ?
529 rate_table
->info
[i
].valid_single_stream
:
530 rate_table
->info
[i
].valid
);
532 u32 phy
= rate_table
->info
[i
].phy
;
533 u8 valid_rate_count
= 0;
535 if (!ath_rc_valid_phyrate(phy
, capflag
, 0))
538 valid_rate_count
= ath_rc_priv
->valid_phy_ratecnt
[phy
];
540 ath_rc_priv
->valid_phy_rateidx
[phy
][valid_rate_count
] = i
;
541 ath_rc_priv
->valid_phy_ratecnt
[phy
] += 1;
542 ath_rc_set_valid_txmask(ath_rc_priv
, i
, 1);
550 static u8
ath_rc_setvalid_rates(struct ath_rate_priv
*ath_rc_priv
,
551 const struct ath_rate_table
*rate_table
,
552 struct ath_rateset
*rateset
,
557 /* Use intersection of working rates and valid rates */
558 for (i
= 0; i
< rateset
->rs_nrates
; i
++) {
559 for (j
= 0; j
< rate_table
->rate_cnt
; j
++) {
560 u32 phy
= rate_table
->info
[j
].phy
;
561 u32 valid
= (!(ath_rc_priv
->ht_cap
& WLAN_RC_DS_FLAG
) ?
562 rate_table
->info
[j
].valid_single_stream
:
563 rate_table
->info
[j
].valid
);
564 u8 rate
= rateset
->rs_rates
[i
];
565 u8 dot11rate
= rate_table
->info
[j
].dot11rate
;
567 /* We allow a rate only if its valid and the
568 * capflag matches one of the validity
569 * (VALID/VALID_20/VALID_40) flags */
571 if (((rate
& 0x7F) == (dot11rate
& 0x7F)) &&
572 ((valid
& WLAN_RC_CAP_MODE(capflag
)) ==
573 WLAN_RC_CAP_MODE(capflag
)) &&
574 !WLAN_RC_PHY_HT(phy
)) {
575 u8 valid_rate_count
= 0;
577 if (!ath_rc_valid_phyrate(phy
, capflag
, 0))
581 ath_rc_priv
->valid_phy_ratecnt
[phy
];
583 ath_rc_priv
->valid_phy_rateidx
[phy
]
584 [valid_rate_count
] = j
;
585 ath_rc_priv
->valid_phy_ratecnt
[phy
] += 1;
586 ath_rc_set_valid_txmask(ath_rc_priv
, j
, 1);
595 static u8
ath_rc_setvalid_htrates(struct ath_rate_priv
*ath_rc_priv
,
596 const struct ath_rate_table
*rate_table
,
597 u8
*mcs_set
, u32 capflag
)
599 struct ath_rateset
*rateset
= (struct ath_rateset
*)mcs_set
;
603 /* Use intersection of working rates and valid rates */
604 for (i
= 0; i
< rateset
->rs_nrates
; i
++) {
605 for (j
= 0; j
< rate_table
->rate_cnt
; j
++) {
606 u32 phy
= rate_table
->info
[j
].phy
;
607 u32 valid
= (!(ath_rc_priv
->ht_cap
& WLAN_RC_DS_FLAG
) ?
608 rate_table
->info
[j
].valid_single_stream
:
609 rate_table
->info
[j
].valid
);
610 u8 rate
= rateset
->rs_rates
[i
];
611 u8 dot11rate
= rate_table
->info
[j
].dot11rate
;
613 if (((rate
& 0x7F) != (dot11rate
& 0x7F)) ||
614 !WLAN_RC_PHY_HT(phy
) ||
615 !WLAN_RC_PHY_HT_VALID(valid
, capflag
))
618 if (!ath_rc_valid_phyrate(phy
, capflag
, 0))
621 ath_rc_priv
->valid_phy_rateidx
[phy
]
622 [ath_rc_priv
->valid_phy_ratecnt
[phy
]] = j
;
623 ath_rc_priv
->valid_phy_ratecnt
[phy
] += 1;
624 ath_rc_set_valid_txmask(ath_rc_priv
, j
, 1);
632 static u8
ath_rc_ratefind_ht(struct ath_softc
*sc
,
633 struct ath_rate_priv
*ath_rc_priv
,
634 const struct ath_rate_table
*rate_table
,
637 u32 dt
, best_thruput
, this_thruput
, now_msec
;
638 u8 rate
, next_rate
, best_rate
, maxindex
, minindex
;
639 int8_t rssi_last
, rssi_reduce
= 0, index
= 0;
643 rssi_last
= median(ath_rc_priv
->rssi_last
,
644 ath_rc_priv
->rssi_last_prev
,
645 ath_rc_priv
->rssi_last_prev2
);
648 * Age (reduce) last ack rssi based on how old it is.
649 * The bizarre numbers are so the delta is 160msec,
650 * meaning we divide by 16.
651 * 0msec <= dt <= 25msec: don't derate
652 * 25msec <= dt <= 185msec: derate linearly from 0 to 10dB
653 * 185msec <= dt: derate by 10dB
656 now_msec
= jiffies_to_msecs(jiffies
);
657 dt
= now_msec
- ath_rc_priv
->rssi_time
;
662 rssi_reduce
= (u8
)((dt
- 25) >> 4);
664 /* Now reduce rssi_last by rssi_reduce */
665 if (rssi_last
< rssi_reduce
)
668 rssi_last
-= rssi_reduce
;
671 * Now look up the rate in the rssi table and return it.
672 * If no rates match then we return 0 (lowest rate)
676 maxindex
= ath_rc_priv
->max_valid_rate
-1;
679 best_rate
= minindex
;
682 * Try the higher rate first. It will reduce memory moving time
683 * if we have very good channel characteristics.
685 for (index
= maxindex
; index
>= minindex
; index
--) {
688 rate
= ath_rc_priv
->valid_rate_index
[index
];
689 if (rate
> ath_rc_priv
->rate_max_phy
)
693 * For TCP the average collision rate is around 11%,
694 * so we ignore PERs less than this. This is to
695 * prevent the rate we are currently using (whose
696 * PER might be in the 10-15 range because of TCP
697 * collisions) looking worse than the next lower
698 * rate whose PER has decayed close to 0. If we
699 * used to next lower rate, its PER would grow to
700 * 10-15 and we would be worse off then staying
701 * at the current rate.
703 per_thres
= ath_rc_priv
->state
[rate
].per
;
707 this_thruput
= rate_table
->info
[rate
].user_ratekbps
*
710 if (best_thruput
<= this_thruput
) {
711 best_thruput
= this_thruput
;
717 ath_rc_priv
->rssi_last_lookup
= rssi_last
;
720 * Must check the actual rate (ratekbps) to account for
721 * non-monoticity of 11g's rate table
724 if (rate
>= ath_rc_priv
->rate_max_phy
) {
725 rate
= ath_rc_priv
->rate_max_phy
;
727 /* Probe the next allowed phy state */
728 if (ath_rc_get_nextvalid_txrate(rate_table
,
729 ath_rc_priv
, rate
, &next_rate
) &&
730 (now_msec
- ath_rc_priv
->probe_time
>
731 rate_table
->probe_interval
) &&
732 (ath_rc_priv
->hw_maxretry_pktcnt
>= 1)) {
734 ath_rc_priv
->probe_rate
= rate
;
735 ath_rc_priv
->probe_time
= now_msec
;
736 ath_rc_priv
->hw_maxretry_pktcnt
= 0;
741 if (rate
> (ath_rc_priv
->rate_table_size
- 1))
742 rate
= ath_rc_priv
->rate_table_size
- 1;
744 ASSERT((rate_table
->info
[rate
].valid
&&
745 (ath_rc_priv
->ht_cap
& WLAN_RC_DS_FLAG
)) ||
746 (rate_table
->info
[rate
].valid_single_stream
&&
747 !(ath_rc_priv
->ht_cap
& WLAN_RC_DS_FLAG
)));
752 static void ath_rc_rate_set_series(const struct ath_rate_table
*rate_table
,
753 struct ieee80211_tx_rate
*rate
,
754 struct ieee80211_tx_rate_control
*txrc
,
755 u8 tries
, u8 rix
, int rtsctsenable
)
760 if (txrc
->short_preamble
)
761 rate
->flags
|= IEEE80211_TX_RC_USE_SHORT_PREAMBLE
;
762 if (txrc
->rts
|| rtsctsenable
)
763 rate
->flags
|= IEEE80211_TX_RC_USE_RTS_CTS
;
764 if (WLAN_RC_PHY_40(rate_table
->info
[rix
].phy
))
765 rate
->flags
|= IEEE80211_TX_RC_40_MHZ_WIDTH
;
766 if (WLAN_RC_PHY_SGI(rate_table
->info
[rix
].phy
))
767 rate
->flags
|= IEEE80211_TX_RC_SHORT_GI
;
768 if (WLAN_RC_PHY_HT(rate_table
->info
[rix
].phy
))
769 rate
->flags
|= IEEE80211_TX_RC_MCS
;
772 static void ath_rc_rate_set_rtscts(struct ath_softc
*sc
,
773 const struct ath_rate_table
*rate_table
,
774 struct ieee80211_tx_info
*tx_info
)
776 struct ieee80211_tx_rate
*rates
= tx_info
->control
.rates
;
777 int i
= 0, rix
= 0, cix
, enable_g_protection
= 0;
779 /* get the cix for the lowest valid rix */
780 for (i
= 3; i
>= 0; i
--) {
781 if (rates
[i
].count
&& (rates
[i
].idx
>= 0)) {
786 cix
= rate_table
->info
[rix
].ctrl_rate
;
788 /* All protection frames are transmited at 2Mb/s for 802.11g,
789 * otherwise we transmit them at 1Mb/s */
790 if (sc
->hw
->conf
.channel
->band
== IEEE80211_BAND_2GHZ
&&
791 !conf_is_ht(&sc
->hw
->conf
))
792 enable_g_protection
= 1;
795 * If 802.11g protection is enabled, determine whether to use RTS/CTS or
796 * just CTS. Note that this is only done for OFDM/HT unicast frames.
798 if ((sc
->sc_flags
& SC_OP_PROTECT_ENABLE
) &&
799 !(tx_info
->flags
& IEEE80211_TX_CTL_NO_ACK
) &&
800 (rate_table
->info
[rix
].phy
== WLAN_RC_PHY_OFDM
||
801 WLAN_RC_PHY_HT(rate_table
->info
[rix
].phy
))) {
802 rates
[0].flags
|= IEEE80211_TX_RC_USE_CTS_PROTECT
;
803 cix
= rate_table
->info
[enable_g_protection
].ctrl_rate
;
806 tx_info
->control
.rts_cts_rate_idx
= cix
;
809 static u8
ath_rc_rate_getidx(struct ath_softc
*sc
,
810 struct ath_rate_priv
*ath_rc_priv
,
811 const struct ath_rate_table
*rate_table
,
812 u8 rix
, u16 stepdown
,
819 for (j
= RATE_TABLE_SIZE
; j
> 0; j
--) {
820 if (ath_rc_get_nextlowervalid_txrate(rate_table
,
821 ath_rc_priv
, rix
, &nextindex
))
827 for (j
= stepdown
; j
> 0; j
--) {
828 if (ath_rc_get_nextlowervalid_txrate(rate_table
,
829 ath_rc_priv
, rix
, &nextindex
))
838 static void ath_rc_ratefind(struct ath_softc
*sc
,
839 struct ath_rate_priv
*ath_rc_priv
,
840 struct ieee80211_tx_rate_control
*txrc
)
842 const struct ath_rate_table
*rate_table
;
843 struct sk_buff
*skb
= txrc
->skb
;
844 struct ieee80211_tx_info
*tx_info
= IEEE80211_SKB_CB(skb
);
845 struct ieee80211_tx_rate
*rates
= tx_info
->control
.rates
;
846 struct ieee80211_hdr
*hdr
= (struct ieee80211_hdr
*)skb
->data
;
847 __le16 fc
= hdr
->frame_control
;
848 u8 try_per_rate
= 0, i
= 0, rix
, nrix
;
851 rate_table
= sc
->cur_rate_table
;
852 rix
= ath_rc_ratefind_ht(sc
, ath_rc_priv
, rate_table
, &is_probe
);
856 /* set one try for probe rates. For the
857 * probes don't enable rts */
858 ath_rc_rate_set_series(rate_table
, &rates
[i
++], txrc
,
861 try_per_rate
= (ATH_11N_TXMAXTRY
/4);
862 /* Get the next tried/allowed rate. No RTS for the next series
863 * after the probe rate
865 nrix
= ath_rc_rate_getidx(sc
, ath_rc_priv
,
866 rate_table
, nrix
, 1, 0);
867 ath_rc_rate_set_series(rate_table
, &rates
[i
++], txrc
,
868 try_per_rate
, nrix
, 0);
870 tx_info
->flags
|= IEEE80211_TX_CTL_RATE_CTRL_PROBE
;
872 try_per_rate
= (ATH_11N_TXMAXTRY
/4);
873 /* Set the choosen rate. No RTS for first series entry. */
874 ath_rc_rate_set_series(rate_table
, &rates
[i
++], txrc
,
875 try_per_rate
, nrix
, 0);
878 /* Fill in the other rates for multirate retry */
879 for ( ; i
< 4; i
++) {
883 try_num
= ((i
+ 1) == 4) ?
884 ATH_11N_TXMAXTRY
- (try_per_rate
* i
) : try_per_rate
;
885 min_rate
= (((i
+ 1) == 4) && 0);
887 nrix
= ath_rc_rate_getidx(sc
, ath_rc_priv
,
888 rate_table
, nrix
, 1, min_rate
);
889 /* All other rates in the series have RTS enabled */
890 ath_rc_rate_set_series(rate_table
, &rates
[i
], txrc
,
895 * NB:Change rate series to enable aggregation when operating
896 * at lower MCS rates. When first rate in series is MCS2
897 * in HT40 @ 2.4GHz, series should look like:
899 * {MCS2, MCS1, MCS0, MCS0}.
901 * When first rate in series is MCS3 in HT20 @ 2.4GHz, series should
904 * {MCS3, MCS2, MCS1, MCS1}
906 * So, set fourth rate in series to be same as third one for
909 if ((sc
->hw
->conf
.channel
->band
== IEEE80211_BAND_2GHZ
) &&
910 (conf_is_ht(&sc
->hw
->conf
))) {
911 u8 dot11rate
= rate_table
->info
[rix
].dot11rate
;
912 u8 phy
= rate_table
->info
[rix
].phy
;
914 ((dot11rate
== 2 && phy
== WLAN_RC_PHY_HT_40_SS
) ||
915 (dot11rate
== 3 && phy
== WLAN_RC_PHY_HT_20_SS
))) {
916 rates
[3].idx
= rates
[2].idx
;
917 rates
[3].flags
= rates
[2].flags
;
922 * Force hardware to use computed duration for next
923 * fragment by disabling multi-rate retry, which
924 * updates duration based on the multi-rate duration table.
926 * FIXME: Fix duration
928 if (!(tx_info
->flags
& IEEE80211_TX_CTL_NO_ACK
) &&
929 (ieee80211_has_morefrags(fc
) ||
930 (le16_to_cpu(hdr
->seq_ctrl
) & IEEE80211_SCTL_FRAG
))) {
931 rates
[1].count
= rates
[2].count
= rates
[3].count
= 0;
932 rates
[1].idx
= rates
[2].idx
= rates
[3].idx
= 0;
933 rates
[0].count
= ATH_TXMAXTRY
;
937 ath_rc_rate_set_rtscts(sc
, rate_table
, tx_info
);
940 static bool ath_rc_update_per(struct ath_softc
*sc
,
941 const struct ath_rate_table
*rate_table
,
942 struct ath_rate_priv
*ath_rc_priv
,
943 struct ath_tx_info_priv
*tx_info_priv
,
944 int tx_rate
, int xretries
, int retries
,
947 bool state_change
= false;
950 static u32 nretry_to_per_lookup
[10] = {
963 last_per
= ath_rc_priv
->state
[tx_rate
].per
;
967 ath_rc_priv
->state
[tx_rate
].per
+= 30;
968 if (ath_rc_priv
->state
[tx_rate
].per
> 100)
969 ath_rc_priv
->state
[tx_rate
].per
= 100;
972 count
= ARRAY_SIZE(nretry_to_per_lookup
);
973 if (retries
>= count
)
976 /* new_PER = 7/8*old_PER + 1/8*(currentPER) */
977 ath_rc_priv
->state
[tx_rate
].per
=
978 (u8
)(last_per
- (last_per
>> 3) + (100 >> 3));
981 /* xretries == 1 or 2 */
983 if (ath_rc_priv
->probe_rate
== tx_rate
)
984 ath_rc_priv
->probe_rate
= 0;
986 } else { /* xretries == 0 */
987 count
= ARRAY_SIZE(nretry_to_per_lookup
);
988 if (retries
>= count
)
991 if (tx_info_priv
->n_bad_frames
) {
992 /* new_PER = 7/8*old_PER + 1/8*(currentPER)
993 * Assuming that n_frames is not 0. The current PER
994 * from the retries is 100 * retries / (retries+1),
995 * since the first retries attempts failed, and the
996 * next one worked. For the one that worked,
997 * n_bad_frames subframes out of n_frames wored,
998 * so the PER for that part is
999 * 100 * n_bad_frames / n_frames, and it contributes
1000 * 100 * n_bad_frames / (n_frames * (retries+1)) to
1001 * the above PER. The expression below is a
1002 * simplified version of the sum of these two terms.
1004 if (tx_info_priv
->n_frames
> 0) {
1005 int n_frames
, n_bad_frames
;
1006 u8 cur_per
, new_per
;
1008 n_bad_frames
= retries
* tx_info_priv
->n_frames
+
1009 tx_info_priv
->n_bad_frames
;
1010 n_frames
= tx_info_priv
->n_frames
* (retries
+ 1);
1011 cur_per
= (100 * n_bad_frames
/ n_frames
) >> 3;
1012 new_per
= (u8
)(last_per
- (last_per
>> 3) + cur_per
);
1013 ath_rc_priv
->state
[tx_rate
].per
= new_per
;
1016 ath_rc_priv
->state
[tx_rate
].per
=
1017 (u8
)(last_per
- (last_per
>> 3) +
1018 (nretry_to_per_lookup
[retries
] >> 3));
1021 ath_rc_priv
->rssi_last_prev2
= ath_rc_priv
->rssi_last_prev
;
1022 ath_rc_priv
->rssi_last_prev
= ath_rc_priv
->rssi_last
;
1023 ath_rc_priv
->rssi_last
= tx_info_priv
->tx
.ts_rssi
;
1024 ath_rc_priv
->rssi_time
= now_msec
;
1027 * If we got at most one retry then increase the max rate if
1028 * this was a probe. Otherwise, ignore the probe.
1030 if (ath_rc_priv
->probe_rate
&& ath_rc_priv
->probe_rate
== tx_rate
) {
1031 if (retries
> 0 || 2 * tx_info_priv
->n_bad_frames
>
1032 tx_info_priv
->n_frames
) {
1034 * Since we probed with just a single attempt,
1035 * any retries means the probe failed. Also,
1036 * if the attempt worked, but more than half
1037 * the subframes were bad then also consider
1038 * the probe a failure.
1040 ath_rc_priv
->probe_rate
= 0;
1044 ath_rc_priv
->rate_max_phy
=
1045 ath_rc_priv
->probe_rate
;
1046 probe_rate
= ath_rc_priv
->probe_rate
;
1048 if (ath_rc_priv
->state
[probe_rate
].per
> 30)
1049 ath_rc_priv
->state
[probe_rate
].per
= 20;
1051 ath_rc_priv
->probe_rate
= 0;
1054 * Since this probe succeeded, we allow the next
1055 * probe twice as soon. This allows the maxRate
1056 * to move up faster if the probes are
1059 ath_rc_priv
->probe_time
=
1060 now_msec
- rate_table
->probe_interval
/ 2;
1066 * Don't update anything. We don't know if
1067 * this was because of collisions or poor signal.
1069 * Later: if rssi_ack is close to
1070 * ath_rc_priv->state[txRate].rssi_thres and we see lots
1071 * of retries, then we could increase
1072 * ath_rc_priv->state[txRate].rssi_thres.
1074 ath_rc_priv
->hw_maxretry_pktcnt
= 0;
1076 int32_t rssi_ackAvg
;
1078 int8_t rssi_ack_vmin
;
1081 * It worked with no retries. First ignore bogus (small)
1084 if (tx_rate
== ath_rc_priv
->rate_max_phy
&&
1085 ath_rc_priv
->hw_maxretry_pktcnt
< 255) {
1086 ath_rc_priv
->hw_maxretry_pktcnt
++;
1089 if (tx_info_priv
->tx
.ts_rssi
<
1090 rate_table
->info
[tx_rate
].rssi_ack_validmin
)
1093 /* Average the rssi */
1094 if (tx_rate
!= ath_rc_priv
->rssi_sum_rate
) {
1095 ath_rc_priv
->rssi_sum_rate
= tx_rate
;
1096 ath_rc_priv
->rssi_sum
=
1097 ath_rc_priv
->rssi_sum_cnt
= 0;
1100 ath_rc_priv
->rssi_sum
+= tx_info_priv
->tx
.ts_rssi
;
1101 ath_rc_priv
->rssi_sum_cnt
++;
1103 if (ath_rc_priv
->rssi_sum_cnt
< 4)
1107 (ath_rc_priv
->rssi_sum
+ 2) / 4;
1109 ath_rc_priv
->state
[tx_rate
].rssi_thres
;
1111 rate_table
->info
[tx_rate
].rssi_ack_validmin
;
1113 ath_rc_priv
->rssi_sum
=
1114 ath_rc_priv
->rssi_sum_cnt
= 0;
1116 /* Now reduce the current rssi threshold */
1117 if ((rssi_ackAvg
< rssi_thres
+ 2) &&
1118 (rssi_thres
> rssi_ack_vmin
)) {
1119 ath_rc_priv
->state
[tx_rate
].rssi_thres
--;
1122 state_change
= true;
1126 return state_change
;
1129 /* Update PER, RSSI and whatever else that the code thinks it is doing.
1130 If you can make sense of all this, you really need to go out more. */
1132 static void ath_rc_update_ht(struct ath_softc
*sc
,
1133 struct ath_rate_priv
*ath_rc_priv
,
1134 struct ath_tx_info_priv
*tx_info_priv
,
1135 int tx_rate
, int xretries
, int retries
)
1137 #define CHK_RSSI(rate) \
1138 ((ath_rc_priv->state[(rate)].rssi_thres + \
1139 rate_table->info[(rate)].rssi_ack_deltamin) > \
1140 ath_rc_priv->state[(rate)+1].rssi_thres)
1142 u32 now_msec
= jiffies_to_msecs(jiffies
);
1145 bool state_change
= false;
1146 const struct ath_rate_table
*rate_table
= sc
->cur_rate_table
;
1147 int size
= ath_rc_priv
->rate_table_size
;
1149 if ((tx_rate
< 0) || (tx_rate
> rate_table
->rate_cnt
))
1152 /* To compensate for some imbalance between ctrl and ext. channel */
1154 if (WLAN_RC_PHY_40(rate_table
->info
[tx_rate
].phy
))
1155 tx_info_priv
->tx
.ts_rssi
=
1156 tx_info_priv
->tx
.ts_rssi
< 3 ? 0 :
1157 tx_info_priv
->tx
.ts_rssi
- 3;
1159 last_per
= ath_rc_priv
->state
[tx_rate
].per
;
1161 /* Update PER first */
1162 state_change
= ath_rc_update_per(sc
, rate_table
, ath_rc_priv
,
1163 tx_info_priv
, tx_rate
, xretries
,
1167 * If this rate looks bad (high PER) then stop using it for
1168 * a while (except if we are probing).
1170 if (ath_rc_priv
->state
[tx_rate
].per
>= 55 && tx_rate
> 0 &&
1171 rate_table
->info
[tx_rate
].ratekbps
<=
1172 rate_table
->info
[ath_rc_priv
->rate_max_phy
].ratekbps
) {
1173 ath_rc_get_nextlowervalid_txrate(rate_table
, ath_rc_priv
,
1174 (u8
)tx_rate
, &ath_rc_priv
->rate_max_phy
);
1176 /* Don't probe for a little while. */
1177 ath_rc_priv
->probe_time
= now_msec
;
1182 * Make sure the rates above this have higher rssi thresholds.
1183 * (Note: Monotonicity is kept within the OFDM rates and
1184 * within the CCK rates. However, no adjustment is
1185 * made to keep the rssi thresholds monotonically
1186 * increasing between the CCK and OFDM rates.)
1188 for (rate
= tx_rate
; rate
< size
- 1; rate
++) {
1189 if (rate_table
->info
[rate
+1].phy
!=
1190 rate_table
->info
[tx_rate
].phy
)
1193 if (CHK_RSSI(rate
)) {
1194 ath_rc_priv
->state
[rate
+1].rssi_thres
=
1195 ath_rc_priv
->state
[rate
].rssi_thres
+
1196 rate_table
->info
[rate
].rssi_ack_deltamin
;
1200 /* Make sure the rates below this have lower rssi thresholds. */
1201 for (rate
= tx_rate
- 1; rate
>= 0; rate
--) {
1202 if (rate_table
->info
[rate
].phy
!=
1203 rate_table
->info
[tx_rate
].phy
)
1206 if (CHK_RSSI(rate
)) {
1207 if (ath_rc_priv
->state
[rate
+1].rssi_thres
<
1208 rate_table
->info
[rate
].rssi_ack_deltamin
)
1209 ath_rc_priv
->state
[rate
].rssi_thres
= 0;
1211 ath_rc_priv
->state
[rate
].rssi_thres
=
1212 ath_rc_priv
->state
[rate
+1].rssi_thres
-
1213 rate_table
->info
[rate
].rssi_ack_deltamin
;
1216 if (ath_rc_priv
->state
[rate
].rssi_thres
<
1217 rate_table
->info
[rate
].rssi_ack_validmin
) {
1218 ath_rc_priv
->state
[rate
].rssi_thres
=
1219 rate_table
->info
[rate
].rssi_ack_validmin
;
1225 /* Make sure the rates below this have lower PER */
1226 /* Monotonicity is kept only for rates below the current rate. */
1227 if (ath_rc_priv
->state
[tx_rate
].per
< last_per
) {
1228 for (rate
= tx_rate
- 1; rate
>= 0; rate
--) {
1229 if (rate_table
->info
[rate
].phy
!=
1230 rate_table
->info
[tx_rate
].phy
)
1233 if (ath_rc_priv
->state
[rate
].per
>
1234 ath_rc_priv
->state
[rate
+1].per
) {
1235 ath_rc_priv
->state
[rate
].per
=
1236 ath_rc_priv
->state
[rate
+1].per
;
1241 /* Maintain monotonicity for rates above the current rate */
1242 for (rate
= tx_rate
; rate
< size
- 1; rate
++) {
1243 if (ath_rc_priv
->state
[rate
+1].per
<
1244 ath_rc_priv
->state
[rate
].per
)
1245 ath_rc_priv
->state
[rate
+1].per
=
1246 ath_rc_priv
->state
[rate
].per
;
1249 /* Every so often, we reduce the thresholds and
1250 * PER (different for CCK and OFDM). */
1251 if (now_msec
- ath_rc_priv
->rssi_down_time
>=
1252 rate_table
->rssi_reduce_interval
) {
1254 for (rate
= 0; rate
< size
; rate
++) {
1255 if (ath_rc_priv
->state
[rate
].rssi_thres
>
1256 rate_table
->info
[rate
].rssi_ack_validmin
)
1257 ath_rc_priv
->state
[rate
].rssi_thres
-= 1;
1259 ath_rc_priv
->rssi_down_time
= now_msec
;
1262 /* Every so often, we reduce the thresholds
1263 * and PER (different for CCK and OFDM). */
1264 if (now_msec
- ath_rc_priv
->per_down_time
>=
1265 rate_table
->rssi_reduce_interval
) {
1266 for (rate
= 0; rate
< size
; rate
++) {
1267 ath_rc_priv
->state
[rate
].per
=
1268 7 * ath_rc_priv
->state
[rate
].per
/ 8;
1271 ath_rc_priv
->per_down_time
= now_msec
;
1274 ath_debug_stat_retries(sc
, tx_rate
, xretries
, retries
,
1275 ath_rc_priv
->state
[tx_rate
].per
);
1280 static int ath_rc_get_rateindex(const struct ath_rate_table
*rate_table
,
1281 struct ieee80211_tx_rate
*rate
)
1285 if ((rate
->flags
& IEEE80211_TX_RC_40_MHZ_WIDTH
) &&
1286 (rate
->flags
& IEEE80211_TX_RC_SHORT_GI
))
1287 rix
= rate_table
->info
[rate
->idx
].ht_index
;
1288 else if (rate
->flags
& IEEE80211_TX_RC_SHORT_GI
)
1289 rix
= rate_table
->info
[rate
->idx
].sgi_index
;
1290 else if (rate
->flags
& IEEE80211_TX_RC_40_MHZ_WIDTH
)
1291 rix
= rate_table
->info
[rate
->idx
].cw40index
;
1293 rix
= rate_table
->info
[rate
->idx
].base_index
;
1298 static void ath_rc_tx_status(struct ath_softc
*sc
,
1299 struct ath_rate_priv
*ath_rc_priv
,
1300 struct ieee80211_tx_info
*tx_info
,
1301 int final_ts_idx
, int xretries
, int long_retry
)
1303 struct ath_tx_info_priv
*tx_info_priv
= ATH_TX_INFO_PRIV(tx_info
);
1304 const struct ath_rate_table
*rate_table
;
1305 struct ieee80211_tx_rate
*rates
= tx_info
->status
.rates
;
1309 rate_table
= sc
->cur_rate_table
;
1312 * If the first rate is not the final index, there
1313 * are intermediate rate failures to be processed.
1315 if (final_ts_idx
!= 0) {
1316 /* Process intermediate rates that failed.*/
1317 for (i
= 0; i
< final_ts_idx
; i
++) {
1318 if (rates
[i
].count
!= 0 && (rates
[i
].idx
>= 0)) {
1319 flags
= rates
[i
].flags
;
1321 /* If HT40 and we have switched mode from
1322 * 40 to 20 => don't update */
1324 if ((flags
& IEEE80211_TX_RC_40_MHZ_WIDTH
) &&
1325 !(ath_rc_priv
->ht_cap
& WLAN_RC_40_FLAG
))
1328 rix
= ath_rc_get_rateindex(rate_table
, &rates
[i
]);
1329 ath_rc_update_ht(sc
, ath_rc_priv
,
1337 * Handle the special case of MIMO PS burst, where the second
1338 * aggregate is sent out with only one rate and one try.
1339 * Treating it as an excessive retry penalizes the rate
1342 if (rates
[0].count
== 1 && xretries
== 1)
1346 flags
= rates
[i
].flags
;
1348 /* If HT40 and we have switched mode from 40 to 20 => don't update */
1349 if ((flags
& IEEE80211_TX_RC_40_MHZ_WIDTH
) &&
1350 !(ath_rc_priv
->ht_cap
& WLAN_RC_40_FLAG
))
1353 rix
= ath_rc_get_rateindex(rate_table
, &rates
[i
]);
1354 ath_rc_update_ht(sc
, ath_rc_priv
, tx_info_priv
, rix
,
1355 xretries
, long_retry
);
1359 struct ath_rate_table
*ath_choose_rate_table(struct ath_softc
*sc
,
1360 enum ieee80211_band band
,
1367 case IEEE80211_BAND_2GHZ
:
1368 mode
= ATH9K_MODE_11G
;
1370 mode
= ATH9K_MODE_11NG_HT20
;
1372 mode
= ATH9K_MODE_11NG_HT40PLUS
;
1374 case IEEE80211_BAND_5GHZ
:
1375 mode
= ATH9K_MODE_11A
;
1377 mode
= ATH9K_MODE_11NA_HT20
;
1379 mode
= ATH9K_MODE_11NA_HT40PLUS
;
1382 DPRINTF(sc
, ATH_DBG_CONFIG
, "Invalid band\n");
1386 BUG_ON(mode
>= ATH9K_MODE_MAX
);
1388 DPRINTF(sc
, ATH_DBG_CONFIG
, "Choosing rate table for mode: %d\n", mode
);
1389 return sc
->hw_rate_table
[mode
];
1392 static void ath_rc_init(struct ath_softc
*sc
,
1393 struct ath_rate_priv
*ath_rc_priv
,
1394 struct ieee80211_supported_band
*sband
,
1395 struct ieee80211_sta
*sta
,
1396 const struct ath_rate_table
*rate_table
)
1398 struct ath_rateset
*rateset
= &ath_rc_priv
->neg_rates
;
1399 u8
*ht_mcs
= (u8
*)&ath_rc_priv
->neg_ht_rates
;
1400 u8 i
, j
, k
, hi
= 0, hthi
= 0;
1403 DPRINTF(sc
, ATH_DBG_FATAL
, "Rate table not initialized\n");
1407 /* Initial rate table size. Will change depending
1408 * on the working rate set */
1409 ath_rc_priv
->rate_table_size
= RATE_TABLE_SIZE
;
1411 /* Initialize thresholds according to the global rate table */
1412 for (i
= 0 ; i
< ath_rc_priv
->rate_table_size
; i
++) {
1413 ath_rc_priv
->state
[i
].rssi_thres
=
1414 rate_table
->info
[i
].rssi_ack_validmin
;
1415 ath_rc_priv
->state
[i
].per
= 0;
1418 /* Determine the valid rates */
1419 ath_rc_init_valid_txmask(ath_rc_priv
);
1421 for (i
= 0; i
< WLAN_RC_PHY_MAX
; i
++) {
1422 for (j
= 0; j
< MAX_TX_RATE_PHY
; j
++)
1423 ath_rc_priv
->valid_phy_rateidx
[i
][j
] = 0;
1424 ath_rc_priv
->valid_phy_ratecnt
[i
] = 0;
1427 if (!rateset
->rs_nrates
) {
1428 /* No working rate, just initialize valid rates */
1429 hi
= ath_rc_init_validrates(ath_rc_priv
, rate_table
,
1430 ath_rc_priv
->ht_cap
);
1432 /* Use intersection of working rates and valid rates */
1433 hi
= ath_rc_setvalid_rates(ath_rc_priv
, rate_table
,
1434 rateset
, ath_rc_priv
->ht_cap
);
1435 if (ath_rc_priv
->ht_cap
& WLAN_RC_HT_FLAG
) {
1436 hthi
= ath_rc_setvalid_htrates(ath_rc_priv
,
1439 ath_rc_priv
->ht_cap
);
1441 hi
= A_MAX(hi
, hthi
);
1444 ath_rc_priv
->rate_table_size
= hi
+ 1;
1445 ath_rc_priv
->rate_max_phy
= 0;
1446 ASSERT(ath_rc_priv
->rate_table_size
<= RATE_TABLE_SIZE
);
1448 for (i
= 0, k
= 0; i
< WLAN_RC_PHY_MAX
; i
++) {
1449 for (j
= 0; j
< ath_rc_priv
->valid_phy_ratecnt
[i
]; j
++) {
1450 ath_rc_priv
->valid_rate_index
[k
++] =
1451 ath_rc_priv
->valid_phy_rateidx
[i
][j
];
1454 if (!ath_rc_valid_phyrate(i
, rate_table
->initial_ratemax
, 1)
1455 || !ath_rc_priv
->valid_phy_ratecnt
[i
])
1458 ath_rc_priv
->rate_max_phy
= ath_rc_priv
->valid_phy_rateidx
[i
][j
-1];
1460 ASSERT(ath_rc_priv
->rate_table_size
<= RATE_TABLE_SIZE
);
1461 ASSERT(k
<= RATE_TABLE_SIZE
);
1463 ath_rc_priv
->max_valid_rate
= k
;
1464 ath_rc_sort_validrates(rate_table
, ath_rc_priv
);
1465 ath_rc_priv
->rate_max_phy
= ath_rc_priv
->valid_rate_index
[k
-4];
1466 sc
->cur_rate_table
= rate_table
;
1468 DPRINTF(sc
, ATH_DBG_CONFIG
, "RC Initialized with capabilities: 0x%x\n",
1469 ath_rc_priv
->ht_cap
);
1472 static u8
ath_rc_build_ht_caps(struct ath_softc
*sc
, struct ieee80211_sta
*sta
,
1473 bool is_cw40
, bool is_sgi40
)
1477 if (sta
->ht_cap
.ht_supported
) {
1478 caps
= WLAN_RC_HT_FLAG
;
1479 if (sc
->sc_ah
->caps
.tx_chainmask
!= 1 &&
1480 ath9k_hw_getcapability(sc
->sc_ah
, ATH9K_CAP_DS
, 0, NULL
)) {
1481 if (sta
->ht_cap
.mcs
.rx_mask
[1])
1482 caps
|= WLAN_RC_DS_FLAG
;
1485 caps
|= WLAN_RC_40_FLAG
;
1487 caps
|= WLAN_RC_SGI_FLAG
;
1493 /***********************************/
1494 /* mac80211 Rate Control callbacks */
1495 /***********************************/
1497 static void ath_tx_status(void *priv
, struct ieee80211_supported_band
*sband
,
1498 struct ieee80211_sta
*sta
, void *priv_sta
,
1499 struct sk_buff
*skb
)
1501 struct ath_softc
*sc
= priv
;
1502 struct ath_rate_priv
*ath_rc_priv
= priv_sta
;
1503 struct ath_tx_info_priv
*tx_info_priv
= NULL
;
1504 struct ieee80211_tx_info
*tx_info
= IEEE80211_SKB_CB(skb
);
1505 struct ieee80211_hdr
*hdr
;
1506 int final_ts_idx
, tx_status
= 0, is_underrun
= 0;
1509 hdr
= (struct ieee80211_hdr
*)skb
->data
;
1510 fc
= hdr
->frame_control
;
1511 tx_info_priv
= ATH_TX_INFO_PRIV(tx_info
);
1512 final_ts_idx
= tx_info_priv
->tx
.ts_rateindex
;
1514 if (!priv_sta
|| !ieee80211_is_data(fc
) ||
1515 !tx_info_priv
->update_rc
)
1518 if (tx_info_priv
->tx
.ts_status
& ATH9K_TXERR_FILT
)
1522 * If underrun error is seen assume it as an excessive retry only
1523 * if prefetch trigger level have reached the max (0x3f for 5416)
1524 * Adjust the long retry as if the frame was tried ATH_11N_TXMAXTRY
1525 * times. This affects how ratectrl updates PER for the failed rate.
1527 if (tx_info_priv
->tx
.ts_flags
&
1528 (ATH9K_TX_DATA_UNDERRUN
| ATH9K_TX_DELIM_UNDERRUN
) &&
1529 ((sc
->sc_ah
->tx_trig_level
) >= ath_rc_priv
->tx_triglevel_max
)) {
1534 if ((tx_info_priv
->tx
.ts_status
& ATH9K_TXERR_XRETRY
) ||
1535 (tx_info_priv
->tx
.ts_status
& ATH9K_TXERR_FIFO
))
1538 ath_rc_tx_status(sc
, ath_rc_priv
, tx_info
, final_ts_idx
, tx_status
,
1539 (is_underrun
) ? ATH_11N_TXMAXTRY
:
1540 tx_info_priv
->tx
.ts_longretry
);
1542 /* Check if aggregation has to be enabled for this tid */
1543 if (conf_is_ht(&sc
->hw
->conf
) &&
1544 !(skb
->protocol
== cpu_to_be16(ETH_P_PAE
))) {
1545 if (ieee80211_is_data_qos(fc
)) {
1547 struct ath_node
*an
;
1549 qc
= ieee80211_get_qos_ctl(hdr
);
1551 an
= (struct ath_node
*)sta
->drv_priv
;
1553 if(ath_tx_aggr_check(sc
, an
, tid
))
1554 ieee80211_start_tx_ba_session(sc
->hw
, hdr
->addr1
, tid
);
1558 ath_debug_stat_rc(sc
, skb
);
1560 kfree(tx_info_priv
);
1563 static void ath_get_rate(void *priv
, struct ieee80211_sta
*sta
, void *priv_sta
,
1564 struct ieee80211_tx_rate_control
*txrc
)
1566 struct ieee80211_supported_band
*sband
= txrc
->sband
;
1567 struct sk_buff
*skb
= txrc
->skb
;
1568 struct ieee80211_hdr
*hdr
= (struct ieee80211_hdr
*)skb
->data
;
1569 struct ieee80211_tx_info
*tx_info
= IEEE80211_SKB_CB(skb
);
1570 struct ath_softc
*sc
= priv
;
1571 struct ath_rate_priv
*ath_rc_priv
= priv_sta
;
1572 __le16 fc
= hdr
->frame_control
;
1574 /* lowest rate for management and NO_ACK frames */
1575 if (!ieee80211_is_data(fc
) ||
1576 tx_info
->flags
& IEEE80211_TX_CTL_NO_ACK
|| !sta
) {
1577 tx_info
->control
.rates
[0].idx
= rate_lowest_index(sband
, sta
);
1578 tx_info
->control
.rates
[0].count
=
1579 (tx_info
->flags
& IEEE80211_TX_CTL_NO_ACK
) ?
1580 1 : ATH_MGT_TXMAXTRY
;
1584 /* Find tx rate for unicast frames */
1585 ath_rc_ratefind(sc
, ath_rc_priv
, txrc
);
1588 static void ath_rate_init(void *priv
, struct ieee80211_supported_band
*sband
,
1589 struct ieee80211_sta
*sta
, void *priv_sta
)
1591 struct ath_softc
*sc
= priv
;
1592 struct ath_rate_priv
*ath_rc_priv
= priv_sta
;
1593 const struct ath_rate_table
*rate_table
= NULL
;
1594 bool is_cw40
, is_sgi40
;
1597 for (i
= 0; i
< sband
->n_bitrates
; i
++) {
1598 if (sta
->supp_rates
[sband
->band
] & BIT(i
)) {
1599 ath_rc_priv
->neg_rates
.rs_rates
[j
]
1600 = (sband
->bitrates
[i
].bitrate
* 2) / 10;
1604 ath_rc_priv
->neg_rates
.rs_nrates
= j
;
1606 if (sta
->ht_cap
.ht_supported
) {
1607 for (i
= 0, j
= 0; i
< 77; i
++) {
1608 if (sta
->ht_cap
.mcs
.rx_mask
[i
/8] & (1<<(i
%8)))
1609 ath_rc_priv
->neg_ht_rates
.rs_rates
[j
++] = i
;
1610 if (j
== ATH_RATE_MAX
)
1613 ath_rc_priv
->neg_ht_rates
.rs_nrates
= j
;
1616 is_cw40
= sta
->ht_cap
.cap
& IEEE80211_HT_CAP_SUP_WIDTH_20_40
;
1617 is_sgi40
= sta
->ht_cap
.cap
& IEEE80211_HT_CAP_SGI_40
;
1619 /* Choose rate table first */
1621 if ((sc
->sc_ah
->opmode
== NL80211_IFTYPE_STATION
) ||
1622 (sc
->sc_ah
->opmode
== NL80211_IFTYPE_MESH_POINT
) ||
1623 (sc
->sc_ah
->opmode
== NL80211_IFTYPE_ADHOC
)) {
1624 rate_table
= ath_choose_rate_table(sc
, sband
->band
,
1625 sta
->ht_cap
.ht_supported
,
1627 } else if (sc
->sc_ah
->opmode
== NL80211_IFTYPE_AP
) {
1628 /* cur_rate_table would be set on init through config() */
1629 rate_table
= sc
->cur_rate_table
;
1632 ath_rc_priv
->ht_cap
= ath_rc_build_ht_caps(sc
, sta
, is_cw40
, is_sgi40
);
1633 ath_rc_init(sc
, priv_sta
, sband
, sta
, rate_table
);
1636 static void ath_rate_update(void *priv
, struct ieee80211_supported_band
*sband
,
1637 struct ieee80211_sta
*sta
, void *priv_sta
,
1640 struct ath_softc
*sc
= priv
;
1641 struct ath_rate_priv
*ath_rc_priv
= priv_sta
;
1642 const struct ath_rate_table
*rate_table
= NULL
;
1643 bool oper_cw40
= false, oper_sgi40
;
1644 bool local_cw40
= (ath_rc_priv
->ht_cap
& WLAN_RC_40_FLAG
) ?
1646 bool local_sgi40
= (ath_rc_priv
->ht_cap
& WLAN_RC_SGI_FLAG
) ?
1649 /* FIXME: Handle AP mode later when we support CWM */
1651 if (changed
& IEEE80211_RC_HT_CHANGED
) {
1652 if (sc
->sc_ah
->opmode
!= NL80211_IFTYPE_STATION
)
1655 if (sc
->hw
->conf
.channel_type
== NL80211_CHAN_HT40MINUS
||
1656 sc
->hw
->conf
.channel_type
== NL80211_CHAN_HT40PLUS
)
1659 oper_sgi40
= (sta
->ht_cap
.cap
& IEEE80211_HT_CAP_SGI_40
) ?
1662 if ((local_cw40
!= oper_cw40
) || (local_sgi40
!= oper_sgi40
)) {
1663 rate_table
= ath_choose_rate_table(sc
, sband
->band
,
1664 sta
->ht_cap
.ht_supported
,
1666 ath_rc_priv
->ht_cap
= ath_rc_build_ht_caps(sc
, sta
,
1667 oper_cw40
, oper_sgi40
);
1668 ath_rc_init(sc
, priv_sta
, sband
, sta
, rate_table
);
1670 DPRINTF(sc
, ATH_DBG_CONFIG
,
1671 "Operating HT Bandwidth changed to: %d\n",
1672 sc
->hw
->conf
.channel_type
);
1677 static void *ath_rate_alloc(struct ieee80211_hw
*hw
, struct dentry
*debugfsdir
)
1679 struct ath_wiphy
*aphy
= hw
->priv
;
1683 static void ath_rate_free(void *priv
)
1688 static void *ath_rate_alloc_sta(void *priv
, struct ieee80211_sta
*sta
, gfp_t gfp
)
1690 struct ath_softc
*sc
= priv
;
1691 struct ath_rate_priv
*rate_priv
;
1693 rate_priv
= kzalloc(sizeof(struct ath_rate_priv
), gfp
);
1695 DPRINTF(sc
, ATH_DBG_FATAL
,
1696 "Unable to allocate private rc structure\n");
1700 rate_priv
->rssi_down_time
= jiffies_to_msecs(jiffies
);
1701 rate_priv
->tx_triglevel_max
= sc
->sc_ah
->caps
.tx_triglevel_max
;
1706 static void ath_rate_free_sta(void *priv
, struct ieee80211_sta
*sta
,
1709 struct ath_rate_priv
*rate_priv
= priv_sta
;
1713 static struct rate_control_ops ath_rate_ops
= {
1715 .name
= "ath9k_rate_control",
1716 .tx_status
= ath_tx_status
,
1717 .get_rate
= ath_get_rate
,
1718 .rate_init
= ath_rate_init
,
1719 .rate_update
= ath_rate_update
,
1720 .alloc
= ath_rate_alloc
,
1721 .free
= ath_rate_free
,
1722 .alloc_sta
= ath_rate_alloc_sta
,
1723 .free_sta
= ath_rate_free_sta
,
1726 void ath_rate_attach(struct ath_softc
*sc
)
1728 sc
->hw_rate_table
[ATH9K_MODE_11B
] =
1729 &ar5416_11b_ratetable
;
1730 sc
->hw_rate_table
[ATH9K_MODE_11A
] =
1731 &ar5416_11a_ratetable
;
1732 sc
->hw_rate_table
[ATH9K_MODE_11G
] =
1733 &ar5416_11g_ratetable
;
1734 sc
->hw_rate_table
[ATH9K_MODE_11NA_HT20
] =
1735 &ar5416_11na_ratetable
;
1736 sc
->hw_rate_table
[ATH9K_MODE_11NG_HT20
] =
1737 &ar5416_11ng_ratetable
;
1738 sc
->hw_rate_table
[ATH9K_MODE_11NA_HT40PLUS
] =
1739 &ar5416_11na_ratetable
;
1740 sc
->hw_rate_table
[ATH9K_MODE_11NA_HT40MINUS
] =
1741 &ar5416_11na_ratetable
;
1742 sc
->hw_rate_table
[ATH9K_MODE_11NG_HT40PLUS
] =
1743 &ar5416_11ng_ratetable
;
1744 sc
->hw_rate_table
[ATH9K_MODE_11NG_HT40MINUS
] =
1745 &ar5416_11ng_ratetable
;
1748 int ath_rate_control_register(void)
1750 return ieee80211_rate_control_register(&ath_rate_ops
);
1753 void ath_rate_control_unregister(void)
1755 ieee80211_rate_control_unregister(&ath_rate_ops
);