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 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 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 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 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 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(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
];
464 static inline int ath_rc_get_nextvalid_txrate(struct ath_rate_table
*rate_table
,
465 struct ath_rate_priv
*ath_rc_priv
,
471 for (i
= 0; i
< ath_rc_priv
->max_valid_rate
- 1; i
++) {
472 if (ath_rc_priv
->valid_rate_index
[i
] == cur_valid_txrate
) {
473 *next_idx
= ath_rc_priv
->valid_rate_index
[i
+1];
478 /* No more valid rates */
484 /* Return true only for single stream */
486 static int ath_rc_valid_phyrate(u32 phy
, u32 capflag
, int ignore_cw
)
488 if (WLAN_RC_PHY_HT(phy
) && !(capflag
& WLAN_RC_HT_FLAG
))
490 if (WLAN_RC_PHY_DS(phy
) && !(capflag
& WLAN_RC_DS_FLAG
))
492 if (WLAN_RC_PHY_SGI(phy
) && !(capflag
& WLAN_RC_SGI_FLAG
))
494 if (!ignore_cw
&& WLAN_RC_PHY_HT(phy
))
495 if (WLAN_RC_PHY_40(phy
) && !(capflag
& WLAN_RC_40_FLAG
))
497 if (!WLAN_RC_PHY_40(phy
) && (capflag
& WLAN_RC_40_FLAG
))
503 ath_rc_get_nextlowervalid_txrate(struct ath_rate_table
*rate_table
,
504 struct ath_rate_priv
*ath_rc_priv
,
505 u8 cur_valid_txrate
, u8
*next_idx
)
509 for (i
= 1; i
< ath_rc_priv
->max_valid_rate
; i
++) {
510 if (ath_rc_priv
->valid_rate_index
[i
] == cur_valid_txrate
) {
511 *next_idx
= ath_rc_priv
->valid_rate_index
[i
-1];
519 static u8
ath_rc_init_validrates(struct ath_rate_priv
*ath_rc_priv
,
520 struct ath_rate_table
*rate_table
,
526 for (i
= 0; i
< rate_table
->rate_cnt
; i
++) {
527 valid
= (!(ath_rc_priv
->ht_cap
& WLAN_RC_DS_FLAG
) ?
528 rate_table
->info
[i
].valid_single_stream
:
529 rate_table
->info
[i
].valid
);
531 u32 phy
= rate_table
->info
[i
].phy
;
532 u8 valid_rate_count
= 0;
534 if (!ath_rc_valid_phyrate(phy
, capflag
, 0))
537 valid_rate_count
= ath_rc_priv
->valid_phy_ratecnt
[phy
];
539 ath_rc_priv
->valid_phy_rateidx
[phy
][valid_rate_count
] = i
;
540 ath_rc_priv
->valid_phy_ratecnt
[phy
] += 1;
541 ath_rc_set_valid_txmask(ath_rc_priv
, i
, 1);
549 static u8
ath_rc_setvalid_rates(struct ath_rate_priv
*ath_rc_priv
,
550 struct ath_rate_table
*rate_table
,
551 struct ath_rateset
*rateset
,
556 /* Use intersection of working rates and valid rates */
557 for (i
= 0; i
< rateset
->rs_nrates
; i
++) {
558 for (j
= 0; j
< rate_table
->rate_cnt
; j
++) {
559 u32 phy
= rate_table
->info
[j
].phy
;
560 u32 valid
= (!(ath_rc_priv
->ht_cap
& WLAN_RC_DS_FLAG
) ?
561 rate_table
->info
[j
].valid_single_stream
:
562 rate_table
->info
[j
].valid
);
563 u8 rate
= rateset
->rs_rates
[i
];
564 u8 dot11rate
= rate_table
->info
[j
].dot11rate
;
566 /* We allow a rate only if its valid and the
567 * capflag matches one of the validity
568 * (VALID/VALID_20/VALID_40) flags */
570 if (((rate
& 0x7F) == (dot11rate
& 0x7F)) &&
571 ((valid
& WLAN_RC_CAP_MODE(capflag
)) ==
572 WLAN_RC_CAP_MODE(capflag
)) &&
573 !WLAN_RC_PHY_HT(phy
)) {
574 u8 valid_rate_count
= 0;
576 if (!ath_rc_valid_phyrate(phy
, capflag
, 0))
580 ath_rc_priv
->valid_phy_ratecnt
[phy
];
582 ath_rc_priv
->valid_phy_rateidx
[phy
]
583 [valid_rate_count
] = j
;
584 ath_rc_priv
->valid_phy_ratecnt
[phy
] += 1;
585 ath_rc_set_valid_txmask(ath_rc_priv
, j
, 1);
594 static u8
ath_rc_setvalid_htrates(struct ath_rate_priv
*ath_rc_priv
,
595 struct ath_rate_table
*rate_table
,
596 u8
*mcs_set
, u32 capflag
)
598 struct ath_rateset
*rateset
= (struct ath_rateset
*)mcs_set
;
602 /* Use intersection of working rates and valid rates */
603 for (i
= 0; i
< rateset
->rs_nrates
; i
++) {
604 for (j
= 0; j
< rate_table
->rate_cnt
; j
++) {
605 u32 phy
= rate_table
->info
[j
].phy
;
606 u32 valid
= (!(ath_rc_priv
->ht_cap
& WLAN_RC_DS_FLAG
) ?
607 rate_table
->info
[j
].valid_single_stream
:
608 rate_table
->info
[j
].valid
);
609 u8 rate
= rateset
->rs_rates
[i
];
610 u8 dot11rate
= rate_table
->info
[j
].dot11rate
;
612 if (((rate
& 0x7F) != (dot11rate
& 0x7F)) ||
613 !WLAN_RC_PHY_HT(phy
) ||
614 !WLAN_RC_PHY_HT_VALID(valid
, capflag
))
617 if (!ath_rc_valid_phyrate(phy
, capflag
, 0))
620 ath_rc_priv
->valid_phy_rateidx
[phy
]
621 [ath_rc_priv
->valid_phy_ratecnt
[phy
]] = j
;
622 ath_rc_priv
->valid_phy_ratecnt
[phy
] += 1;
623 ath_rc_set_valid_txmask(ath_rc_priv
, j
, 1);
631 static u8
ath_rc_ratefind_ht(struct ath_softc
*sc
,
632 struct ath_rate_priv
*ath_rc_priv
,
633 struct ath_rate_table
*rate_table
,
636 u32 dt
, best_thruput
, this_thruput
, now_msec
;
637 u8 rate
, next_rate
, best_rate
, maxindex
, minindex
;
638 int8_t rssi_last
, rssi_reduce
= 0, index
= 0;
642 rssi_last
= median(ath_rc_priv
->rssi_last
,
643 ath_rc_priv
->rssi_last_prev
,
644 ath_rc_priv
->rssi_last_prev2
);
647 * Age (reduce) last ack rssi based on how old it is.
648 * The bizarre numbers are so the delta is 160msec,
649 * meaning we divide by 16.
650 * 0msec <= dt <= 25msec: don't derate
651 * 25msec <= dt <= 185msec: derate linearly from 0 to 10dB
652 * 185msec <= dt: derate by 10dB
655 now_msec
= jiffies_to_msecs(jiffies
);
656 dt
= now_msec
- ath_rc_priv
->rssi_time
;
661 rssi_reduce
= (u8
)((dt
- 25) >> 4);
663 /* Now reduce rssi_last by rssi_reduce */
664 if (rssi_last
< rssi_reduce
)
667 rssi_last
-= rssi_reduce
;
670 * Now look up the rate in the rssi table and return it.
671 * If no rates match then we return 0 (lowest rate)
675 maxindex
= ath_rc_priv
->max_valid_rate
-1;
678 best_rate
= minindex
;
681 * Try the higher rate first. It will reduce memory moving time
682 * if we have very good channel characteristics.
684 for (index
= maxindex
; index
>= minindex
; index
--) {
687 rate
= ath_rc_priv
->valid_rate_index
[index
];
688 if (rate
> ath_rc_priv
->rate_max_phy
)
692 * For TCP the average collision rate is around 11%,
693 * so we ignore PERs less than this. This is to
694 * prevent the rate we are currently using (whose
695 * PER might be in the 10-15 range because of TCP
696 * collisions) looking worse than the next lower
697 * rate whose PER has decayed close to 0. If we
698 * used to next lower rate, its PER would grow to
699 * 10-15 and we would be worse off then staying
700 * at the current rate.
702 per_thres
= ath_rc_priv
->state
[rate
].per
;
706 this_thruput
= rate_table
->info
[rate
].user_ratekbps
*
709 if (best_thruput
<= this_thruput
) {
710 best_thruput
= this_thruput
;
716 ath_rc_priv
->rssi_last_lookup
= rssi_last
;
719 * Must check the actual rate (ratekbps) to account for
720 * non-monoticity of 11g's rate table
723 if (rate
>= ath_rc_priv
->rate_max_phy
) {
724 rate
= ath_rc_priv
->rate_max_phy
;
726 /* Probe the next allowed phy state */
727 if (ath_rc_get_nextvalid_txrate(rate_table
,
728 ath_rc_priv
, rate
, &next_rate
) &&
729 (now_msec
- ath_rc_priv
->probe_time
>
730 rate_table
->probe_interval
) &&
731 (ath_rc_priv
->hw_maxretry_pktcnt
>= 1)) {
733 ath_rc_priv
->probe_rate
= rate
;
734 ath_rc_priv
->probe_time
= now_msec
;
735 ath_rc_priv
->hw_maxretry_pktcnt
= 0;
740 if (rate
> (ath_rc_priv
->rate_table_size
- 1))
741 rate
= ath_rc_priv
->rate_table_size
- 1;
743 ASSERT((rate_table
->info
[rate
].valid
&&
744 (ath_rc_priv
->ht_cap
& WLAN_RC_DS_FLAG
)) ||
745 (rate_table
->info
[rate
].valid_single_stream
&&
746 !(ath_rc_priv
->ht_cap
& WLAN_RC_DS_FLAG
)));
751 static void ath_rc_rate_set_series(struct ath_rate_table
*rate_table
,
752 struct ieee80211_tx_rate
*rate
,
753 struct ieee80211_tx_rate_control
*txrc
,
754 u8 tries
, u8 rix
, int rtsctsenable
)
759 if (txrc
->short_preamble
)
760 rate
->flags
|= IEEE80211_TX_RC_USE_SHORT_PREAMBLE
;
761 if (txrc
->rts
|| rtsctsenable
)
762 rate
->flags
|= IEEE80211_TX_RC_USE_RTS_CTS
;
763 if (WLAN_RC_PHY_40(rate_table
->info
[rix
].phy
))
764 rate
->flags
|= IEEE80211_TX_RC_40_MHZ_WIDTH
;
765 if (WLAN_RC_PHY_SGI(rate_table
->info
[rix
].phy
))
766 rate
->flags
|= IEEE80211_TX_RC_SHORT_GI
;
767 if (WLAN_RC_PHY_HT(rate_table
->info
[rix
].phy
))
768 rate
->flags
|= IEEE80211_TX_RC_MCS
;
771 static void ath_rc_rate_set_rtscts(struct ath_softc
*sc
,
772 struct ath_rate_table
*rate_table
,
773 struct ieee80211_tx_info
*tx_info
)
775 struct ieee80211_tx_rate
*rates
= tx_info
->control
.rates
;
776 int i
= 0, rix
= 0, cix
, enable_g_protection
= 0;
778 /* get the cix for the lowest valid rix */
779 for (i
= 3; i
>= 0; i
--) {
780 if (rates
[i
].count
&& (rates
[i
].idx
>= 0)) {
785 cix
= rate_table
->info
[rix
].ctrl_rate
;
787 /* All protection frames are transmited at 2Mb/s for 802.11g,
788 * otherwise we transmit them at 1Mb/s */
789 if (sc
->hw
->conf
.channel
->band
== IEEE80211_BAND_2GHZ
&&
790 !conf_is_ht(&sc
->hw
->conf
))
791 enable_g_protection
= 1;
794 * If 802.11g protection is enabled, determine whether to use RTS/CTS or
795 * just CTS. Note that this is only done for OFDM/HT unicast frames.
797 if ((sc
->sc_flags
& SC_OP_PROTECT_ENABLE
) &&
798 !(tx_info
->flags
& IEEE80211_TX_CTL_NO_ACK
) &&
799 (rate_table
->info
[rix
].phy
== WLAN_RC_PHY_OFDM
||
800 WLAN_RC_PHY_HT(rate_table
->info
[rix
].phy
))) {
801 rates
[0].flags
|= IEEE80211_TX_RC_USE_CTS_PROTECT
;
802 cix
= rate_table
->info
[enable_g_protection
].ctrl_rate
;
805 tx_info
->control
.rts_cts_rate_idx
= cix
;
808 static u8
ath_rc_rate_getidx(struct ath_softc
*sc
,
809 struct ath_rate_priv
*ath_rc_priv
,
810 struct ath_rate_table
*rate_table
,
811 u8 rix
, u16 stepdown
,
818 for (j
= RATE_TABLE_SIZE
; j
> 0; j
--) {
819 if (ath_rc_get_nextlowervalid_txrate(rate_table
,
820 ath_rc_priv
, rix
, &nextindex
))
826 for (j
= stepdown
; j
> 0; j
--) {
827 if (ath_rc_get_nextlowervalid_txrate(rate_table
,
828 ath_rc_priv
, rix
, &nextindex
))
837 static void ath_rc_ratefind(struct ath_softc
*sc
,
838 struct ath_rate_priv
*ath_rc_priv
,
839 struct ieee80211_tx_rate_control
*txrc
)
841 struct ath_rate_table
*rate_table
;
842 struct sk_buff
*skb
= txrc
->skb
;
843 struct ieee80211_tx_info
*tx_info
= IEEE80211_SKB_CB(skb
);
844 struct ieee80211_tx_rate
*rates
= tx_info
->control
.rates
;
845 struct ieee80211_hdr
*hdr
= (struct ieee80211_hdr
*)skb
->data
;
846 __le16 fc
= hdr
->frame_control
;
847 u8 try_per_rate
= 0, i
= 0, rix
, nrix
;
850 rate_table
= sc
->cur_rate_table
;
851 rix
= ath_rc_ratefind_ht(sc
, ath_rc_priv
, rate_table
, &is_probe
);
855 /* set one try for probe rates. For the
856 * probes don't enable rts */
857 ath_rc_rate_set_series(rate_table
, &rates
[i
++], txrc
,
860 try_per_rate
= (ATH_11N_TXMAXTRY
/4);
861 /* Get the next tried/allowed rate. No RTS for the next series
862 * after the probe rate
864 nrix
= ath_rc_rate_getidx(sc
, ath_rc_priv
,
865 rate_table
, nrix
, 1, 0);
866 ath_rc_rate_set_series(rate_table
, &rates
[i
++], txrc
,
867 try_per_rate
, nrix
, 0);
869 tx_info
->flags
|= IEEE80211_TX_CTL_RATE_CTRL_PROBE
;
871 try_per_rate
= (ATH_11N_TXMAXTRY
/4);
872 /* Set the choosen rate. No RTS for first series entry. */
873 ath_rc_rate_set_series(rate_table
, &rates
[i
++], txrc
,
874 try_per_rate
, nrix
, 0);
877 /* Fill in the other rates for multirate retry */
878 for ( ; i
< 4; i
++) {
882 try_num
= ((i
+ 1) == 4) ?
883 ATH_11N_TXMAXTRY
- (try_per_rate
* i
) : try_per_rate
;
884 min_rate
= (((i
+ 1) == 4) && 0);
886 nrix
= ath_rc_rate_getidx(sc
, ath_rc_priv
,
887 rate_table
, nrix
, 1, min_rate
);
888 /* All other rates in the series have RTS enabled */
889 ath_rc_rate_set_series(rate_table
, &rates
[i
], txrc
,
894 * NB:Change rate series to enable aggregation when operating
895 * at lower MCS rates. When first rate in series is MCS2
896 * in HT40 @ 2.4GHz, series should look like:
898 * {MCS2, MCS1, MCS0, MCS0}.
900 * When first rate in series is MCS3 in HT20 @ 2.4GHz, series should
903 * {MCS3, MCS2, MCS1, MCS1}
905 * So, set fourth rate in series to be same as third one for
908 if ((sc
->hw
->conf
.channel
->band
== IEEE80211_BAND_2GHZ
) &&
909 (conf_is_ht(&sc
->hw
->conf
))) {
910 u8 dot11rate
= rate_table
->info
[rix
].dot11rate
;
911 u8 phy
= rate_table
->info
[rix
].phy
;
913 ((dot11rate
== 2 && phy
== WLAN_RC_PHY_HT_40_SS
) ||
914 (dot11rate
== 3 && phy
== WLAN_RC_PHY_HT_20_SS
))) {
915 rates
[3].idx
= rates
[2].idx
;
916 rates
[3].flags
= rates
[2].flags
;
921 * Force hardware to use computed duration for next
922 * fragment by disabling multi-rate retry, which
923 * updates duration based on the multi-rate duration table.
925 * FIXME: Fix duration
927 if (!(tx_info
->flags
& IEEE80211_TX_CTL_NO_ACK
) &&
928 (ieee80211_has_morefrags(fc
) ||
929 (le16_to_cpu(hdr
->seq_ctrl
) & IEEE80211_SCTL_FRAG
))) {
930 rates
[1].count
= rates
[2].count
= rates
[3].count
= 0;
931 rates
[1].idx
= rates
[2].idx
= rates
[3].idx
= 0;
932 rates
[0].count
= ATH_TXMAXTRY
;
936 ath_rc_rate_set_rtscts(sc
, rate_table
, tx_info
);
939 static bool ath_rc_update_per(struct ath_softc
*sc
,
940 struct ath_rate_table
*rate_table
,
941 struct ath_rate_priv
*ath_rc_priv
,
942 struct ath_tx_info_priv
*tx_info_priv
,
943 int tx_rate
, int xretries
, int retries
,
946 bool state_change
= false;
949 static u32 nretry_to_per_lookup
[10] = {
962 last_per
= ath_rc_priv
->state
[tx_rate
].per
;
966 ath_rc_priv
->state
[tx_rate
].per
+= 30;
967 if (ath_rc_priv
->state
[tx_rate
].per
> 100)
968 ath_rc_priv
->state
[tx_rate
].per
= 100;
971 count
= ARRAY_SIZE(nretry_to_per_lookup
);
972 if (retries
>= count
)
975 /* new_PER = 7/8*old_PER + 1/8*(currentPER) */
976 ath_rc_priv
->state
[tx_rate
].per
=
977 (u8
)(last_per
- (last_per
>> 3) + (100 >> 3));
980 /* xretries == 1 or 2 */
982 if (ath_rc_priv
->probe_rate
== tx_rate
)
983 ath_rc_priv
->probe_rate
= 0;
985 } else { /* xretries == 0 */
986 count
= ARRAY_SIZE(nretry_to_per_lookup
);
987 if (retries
>= count
)
990 if (tx_info_priv
->n_bad_frames
) {
991 /* new_PER = 7/8*old_PER + 1/8*(currentPER)
992 * Assuming that n_frames is not 0. The current PER
993 * from the retries is 100 * retries / (retries+1),
994 * since the first retries attempts failed, and the
995 * next one worked. For the one that worked,
996 * n_bad_frames subframes out of n_frames wored,
997 * so the PER for that part is
998 * 100 * n_bad_frames / n_frames, and it contributes
999 * 100 * n_bad_frames / (n_frames * (retries+1)) to
1000 * the above PER. The expression below is a
1001 * simplified version of the sum of these two terms.
1003 if (tx_info_priv
->n_frames
> 0) {
1004 int n_frames
, n_bad_frames
;
1005 u8 cur_per
, new_per
;
1007 n_bad_frames
= retries
* tx_info_priv
->n_frames
+
1008 tx_info_priv
->n_bad_frames
;
1009 n_frames
= tx_info_priv
->n_frames
* (retries
+ 1);
1010 cur_per
= (100 * n_bad_frames
/ n_frames
) >> 3;
1011 new_per
= (u8
)(last_per
- (last_per
>> 3) + cur_per
);
1012 ath_rc_priv
->state
[tx_rate
].per
= new_per
;
1015 ath_rc_priv
->state
[tx_rate
].per
=
1016 (u8
)(last_per
- (last_per
>> 3) +
1017 (nretry_to_per_lookup
[retries
] >> 3));
1020 ath_rc_priv
->rssi_last_prev2
= ath_rc_priv
->rssi_last_prev
;
1021 ath_rc_priv
->rssi_last_prev
= ath_rc_priv
->rssi_last
;
1022 ath_rc_priv
->rssi_last
= tx_info_priv
->tx
.ts_rssi
;
1023 ath_rc_priv
->rssi_time
= now_msec
;
1026 * If we got at most one retry then increase the max rate if
1027 * this was a probe. Otherwise, ignore the probe.
1029 if (ath_rc_priv
->probe_rate
&& ath_rc_priv
->probe_rate
== tx_rate
) {
1030 if (retries
> 0 || 2 * tx_info_priv
->n_bad_frames
>
1031 tx_info_priv
->n_frames
) {
1033 * Since we probed with just a single attempt,
1034 * any retries means the probe failed. Also,
1035 * if the attempt worked, but more than half
1036 * the subframes were bad then also consider
1037 * the probe a failure.
1039 ath_rc_priv
->probe_rate
= 0;
1043 ath_rc_priv
->rate_max_phy
=
1044 ath_rc_priv
->probe_rate
;
1045 probe_rate
= ath_rc_priv
->probe_rate
;
1047 if (ath_rc_priv
->state
[probe_rate
].per
> 30)
1048 ath_rc_priv
->state
[probe_rate
].per
= 20;
1050 ath_rc_priv
->probe_rate
= 0;
1053 * Since this probe succeeded, we allow the next
1054 * probe twice as soon. This allows the maxRate
1055 * to move up faster if the probes are
1058 ath_rc_priv
->probe_time
=
1059 now_msec
- rate_table
->probe_interval
/ 2;
1065 * Don't update anything. We don't know if
1066 * this was because of collisions or poor signal.
1068 * Later: if rssi_ack is close to
1069 * ath_rc_priv->state[txRate].rssi_thres and we see lots
1070 * of retries, then we could increase
1071 * ath_rc_priv->state[txRate].rssi_thres.
1073 ath_rc_priv
->hw_maxretry_pktcnt
= 0;
1075 int32_t rssi_ackAvg
;
1077 int8_t rssi_ack_vmin
;
1080 * It worked with no retries. First ignore bogus (small)
1083 if (tx_rate
== ath_rc_priv
->rate_max_phy
&&
1084 ath_rc_priv
->hw_maxretry_pktcnt
< 255) {
1085 ath_rc_priv
->hw_maxretry_pktcnt
++;
1088 if (tx_info_priv
->tx
.ts_rssi
<
1089 rate_table
->info
[tx_rate
].rssi_ack_validmin
)
1092 /* Average the rssi */
1093 if (tx_rate
!= ath_rc_priv
->rssi_sum_rate
) {
1094 ath_rc_priv
->rssi_sum_rate
= tx_rate
;
1095 ath_rc_priv
->rssi_sum
=
1096 ath_rc_priv
->rssi_sum_cnt
= 0;
1099 ath_rc_priv
->rssi_sum
+= tx_info_priv
->tx
.ts_rssi
;
1100 ath_rc_priv
->rssi_sum_cnt
++;
1102 if (ath_rc_priv
->rssi_sum_cnt
< 4)
1106 (ath_rc_priv
->rssi_sum
+ 2) / 4;
1108 ath_rc_priv
->state
[tx_rate
].rssi_thres
;
1110 rate_table
->info
[tx_rate
].rssi_ack_validmin
;
1112 ath_rc_priv
->rssi_sum
=
1113 ath_rc_priv
->rssi_sum_cnt
= 0;
1115 /* Now reduce the current rssi threshold */
1116 if ((rssi_ackAvg
< rssi_thres
+ 2) &&
1117 (rssi_thres
> rssi_ack_vmin
)) {
1118 ath_rc_priv
->state
[tx_rate
].rssi_thres
--;
1121 state_change
= true;
1125 return state_change
;
1128 /* Update PER, RSSI and whatever else that the code thinks it is doing.
1129 If you can make sense of all this, you really need to go out more. */
1131 static void ath_rc_update_ht(struct ath_softc
*sc
,
1132 struct ath_rate_priv
*ath_rc_priv
,
1133 struct ath_tx_info_priv
*tx_info_priv
,
1134 int tx_rate
, int xretries
, int retries
)
1136 #define CHK_RSSI(rate) \
1137 ((ath_rc_priv->state[(rate)].rssi_thres + \
1138 rate_table->info[(rate)].rssi_ack_deltamin) > \
1139 ath_rc_priv->state[(rate)+1].rssi_thres)
1141 u32 now_msec
= jiffies_to_msecs(jiffies
);
1144 bool state_change
= false;
1145 struct ath_rate_table
*rate_table
= sc
->cur_rate_table
;
1146 int size
= ath_rc_priv
->rate_table_size
;
1148 if ((tx_rate
< 0) || (tx_rate
> rate_table
->rate_cnt
))
1151 /* To compensate for some imbalance between ctrl and ext. channel */
1153 if (WLAN_RC_PHY_40(rate_table
->info
[tx_rate
].phy
))
1154 tx_info_priv
->tx
.ts_rssi
=
1155 tx_info_priv
->tx
.ts_rssi
< 3 ? 0 :
1156 tx_info_priv
->tx
.ts_rssi
- 3;
1158 last_per
= ath_rc_priv
->state
[tx_rate
].per
;
1160 /* Update PER first */
1161 state_change
= ath_rc_update_per(sc
, rate_table
, ath_rc_priv
,
1162 tx_info_priv
, tx_rate
, xretries
,
1166 * If this rate looks bad (high PER) then stop using it for
1167 * a while (except if we are probing).
1169 if (ath_rc_priv
->state
[tx_rate
].per
>= 55 && tx_rate
> 0 &&
1170 rate_table
->info
[tx_rate
].ratekbps
<=
1171 rate_table
->info
[ath_rc_priv
->rate_max_phy
].ratekbps
) {
1172 ath_rc_get_nextlowervalid_txrate(rate_table
, ath_rc_priv
,
1173 (u8
)tx_rate
, &ath_rc_priv
->rate_max_phy
);
1175 /* Don't probe for a little while. */
1176 ath_rc_priv
->probe_time
= now_msec
;
1181 * Make sure the rates above this have higher rssi thresholds.
1182 * (Note: Monotonicity is kept within the OFDM rates and
1183 * within the CCK rates. However, no adjustment is
1184 * made to keep the rssi thresholds monotonically
1185 * increasing between the CCK and OFDM rates.)
1187 for (rate
= tx_rate
; rate
< size
- 1; rate
++) {
1188 if (rate_table
->info
[rate
+1].phy
!=
1189 rate_table
->info
[tx_rate
].phy
)
1192 if (CHK_RSSI(rate
)) {
1193 ath_rc_priv
->state
[rate
+1].rssi_thres
=
1194 ath_rc_priv
->state
[rate
].rssi_thres
+
1195 rate_table
->info
[rate
].rssi_ack_deltamin
;
1199 /* Make sure the rates below this have lower rssi thresholds. */
1200 for (rate
= tx_rate
- 1; rate
>= 0; rate
--) {
1201 if (rate_table
->info
[rate
].phy
!=
1202 rate_table
->info
[tx_rate
].phy
)
1205 if (CHK_RSSI(rate
)) {
1206 if (ath_rc_priv
->state
[rate
+1].rssi_thres
<
1207 rate_table
->info
[rate
].rssi_ack_deltamin
)
1208 ath_rc_priv
->state
[rate
].rssi_thres
= 0;
1210 ath_rc_priv
->state
[rate
].rssi_thres
=
1211 ath_rc_priv
->state
[rate
+1].rssi_thres
-
1212 rate_table
->info
[rate
].rssi_ack_deltamin
;
1215 if (ath_rc_priv
->state
[rate
].rssi_thres
<
1216 rate_table
->info
[rate
].rssi_ack_validmin
) {
1217 ath_rc_priv
->state
[rate
].rssi_thres
=
1218 rate_table
->info
[rate
].rssi_ack_validmin
;
1224 /* Make sure the rates below this have lower PER */
1225 /* Monotonicity is kept only for rates below the current rate. */
1226 if (ath_rc_priv
->state
[tx_rate
].per
< last_per
) {
1227 for (rate
= tx_rate
- 1; rate
>= 0; rate
--) {
1228 if (rate_table
->info
[rate
].phy
!=
1229 rate_table
->info
[tx_rate
].phy
)
1232 if (ath_rc_priv
->state
[rate
].per
>
1233 ath_rc_priv
->state
[rate
+1].per
) {
1234 ath_rc_priv
->state
[rate
].per
=
1235 ath_rc_priv
->state
[rate
+1].per
;
1240 /* Maintain monotonicity for rates above the current rate */
1241 for (rate
= tx_rate
; rate
< size
- 1; rate
++) {
1242 if (ath_rc_priv
->state
[rate
+1].per
<
1243 ath_rc_priv
->state
[rate
].per
)
1244 ath_rc_priv
->state
[rate
+1].per
=
1245 ath_rc_priv
->state
[rate
].per
;
1248 /* Every so often, we reduce the thresholds and
1249 * PER (different for CCK and OFDM). */
1250 if (now_msec
- ath_rc_priv
->rssi_down_time
>=
1251 rate_table
->rssi_reduce_interval
) {
1253 for (rate
= 0; rate
< size
; rate
++) {
1254 if (ath_rc_priv
->state
[rate
].rssi_thres
>
1255 rate_table
->info
[rate
].rssi_ack_validmin
)
1256 ath_rc_priv
->state
[rate
].rssi_thres
-= 1;
1258 ath_rc_priv
->rssi_down_time
= now_msec
;
1261 /* Every so often, we reduce the thresholds
1262 * and PER (different for CCK and OFDM). */
1263 if (now_msec
- ath_rc_priv
->per_down_time
>=
1264 rate_table
->rssi_reduce_interval
) {
1265 for (rate
= 0; rate
< size
; rate
++) {
1266 ath_rc_priv
->state
[rate
].per
=
1267 7 * ath_rc_priv
->state
[rate
].per
/ 8;
1270 ath_rc_priv
->per_down_time
= now_msec
;
1273 ath_debug_stat_retries(sc
, tx_rate
, xretries
, retries
,
1274 ath_rc_priv
->state
[tx_rate
].per
);
1279 static int ath_rc_get_rateindex(struct ath_rate_table
*rate_table
,
1280 struct ieee80211_tx_rate
*rate
)
1284 if ((rate
->flags
& IEEE80211_TX_RC_40_MHZ_WIDTH
) &&
1285 (rate
->flags
& IEEE80211_TX_RC_SHORT_GI
))
1286 rix
= rate_table
->info
[rate
->idx
].ht_index
;
1287 else if (rate
->flags
& IEEE80211_TX_RC_SHORT_GI
)
1288 rix
= rate_table
->info
[rate
->idx
].sgi_index
;
1289 else if (rate
->flags
& IEEE80211_TX_RC_40_MHZ_WIDTH
)
1290 rix
= rate_table
->info
[rate
->idx
].cw40index
;
1292 rix
= rate_table
->info
[rate
->idx
].base_index
;
1297 static void ath_rc_tx_status(struct ath_softc
*sc
,
1298 struct ath_rate_priv
*ath_rc_priv
,
1299 struct ieee80211_tx_info
*tx_info
,
1300 int final_ts_idx
, int xretries
, int long_retry
)
1302 struct ath_tx_info_priv
*tx_info_priv
= ATH_TX_INFO_PRIV(tx_info
);
1303 struct ath_rate_table
*rate_table
;
1304 struct ieee80211_tx_rate
*rates
= tx_info
->status
.rates
;
1308 rate_table
= sc
->cur_rate_table
;
1311 * If the first rate is not the final index, there
1312 * are intermediate rate failures to be processed.
1314 if (final_ts_idx
!= 0) {
1315 /* Process intermediate rates that failed.*/
1316 for (i
= 0; i
< final_ts_idx
; i
++) {
1317 if (rates
[i
].count
!= 0 && (rates
[i
].idx
>= 0)) {
1318 flags
= rates
[i
].flags
;
1320 /* If HT40 and we have switched mode from
1321 * 40 to 20 => don't update */
1323 if ((flags
& IEEE80211_TX_RC_40_MHZ_WIDTH
) &&
1324 !(ath_rc_priv
->ht_cap
& WLAN_RC_40_FLAG
))
1327 rix
= ath_rc_get_rateindex(rate_table
, &rates
[i
]);
1328 ath_rc_update_ht(sc
, ath_rc_priv
,
1336 * Handle the special case of MIMO PS burst, where the second
1337 * aggregate is sent out with only one rate and one try.
1338 * Treating it as an excessive retry penalizes the rate
1341 if (rates
[0].count
== 1 && xretries
== 1)
1345 flags
= rates
[i
].flags
;
1347 /* If HT40 and we have switched mode from 40 to 20 => don't update */
1348 if ((flags
& IEEE80211_TX_RC_40_MHZ_WIDTH
) &&
1349 !(ath_rc_priv
->ht_cap
& WLAN_RC_40_FLAG
))
1352 rix
= ath_rc_get_rateindex(rate_table
, &rates
[i
]);
1353 ath_rc_update_ht(sc
, ath_rc_priv
, tx_info_priv
, rix
,
1354 xretries
, long_retry
);
1357 static struct ath_rate_table
*ath_choose_rate_table(struct ath_softc
*sc
,
1358 enum ieee80211_band band
,
1359 bool is_ht
, bool is_cw_40
)
1364 case IEEE80211_BAND_2GHZ
:
1365 mode
= ATH9K_MODE_11G
;
1367 mode
= ATH9K_MODE_11NG_HT20
;
1369 mode
= ATH9K_MODE_11NG_HT40PLUS
;
1371 case IEEE80211_BAND_5GHZ
:
1372 mode
= ATH9K_MODE_11A
;
1374 mode
= ATH9K_MODE_11NA_HT20
;
1376 mode
= ATH9K_MODE_11NA_HT40PLUS
;
1379 DPRINTF(sc
, ATH_DBG_CONFIG
, "Invalid band\n");
1383 BUG_ON(mode
>= ATH9K_MODE_MAX
);
1385 DPRINTF(sc
, ATH_DBG_CONFIG
, "Choosing rate table for mode: %d\n", mode
);
1386 return sc
->hw_rate_table
[mode
];
1389 static void ath_rc_init(struct ath_softc
*sc
,
1390 struct ath_rate_priv
*ath_rc_priv
,
1391 struct ieee80211_supported_band
*sband
,
1392 struct ieee80211_sta
*sta
,
1393 struct ath_rate_table
*rate_table
)
1395 struct ath_rateset
*rateset
= &ath_rc_priv
->neg_rates
;
1396 u8
*ht_mcs
= (u8
*)&ath_rc_priv
->neg_ht_rates
;
1397 u8 i
, j
, k
, hi
= 0, hthi
= 0;
1400 DPRINTF(sc
, ATH_DBG_FATAL
, "Rate table not initialized\n");
1404 /* Initial rate table size. Will change depending
1405 * on the working rate set */
1406 ath_rc_priv
->rate_table_size
= RATE_TABLE_SIZE
;
1408 /* Initialize thresholds according to the global rate table */
1409 for (i
= 0 ; i
< ath_rc_priv
->rate_table_size
; i
++) {
1410 ath_rc_priv
->state
[i
].rssi_thres
=
1411 rate_table
->info
[i
].rssi_ack_validmin
;
1412 ath_rc_priv
->state
[i
].per
= 0;
1415 /* Determine the valid rates */
1416 ath_rc_init_valid_txmask(ath_rc_priv
);
1418 for (i
= 0; i
< WLAN_RC_PHY_MAX
; i
++) {
1419 for (j
= 0; j
< MAX_TX_RATE_PHY
; j
++)
1420 ath_rc_priv
->valid_phy_rateidx
[i
][j
] = 0;
1421 ath_rc_priv
->valid_phy_ratecnt
[i
] = 0;
1424 if (!rateset
->rs_nrates
) {
1425 /* No working rate, just initialize valid rates */
1426 hi
= ath_rc_init_validrates(ath_rc_priv
, rate_table
,
1427 ath_rc_priv
->ht_cap
);
1429 /* Use intersection of working rates and valid rates */
1430 hi
= ath_rc_setvalid_rates(ath_rc_priv
, rate_table
,
1431 rateset
, ath_rc_priv
->ht_cap
);
1432 if (ath_rc_priv
->ht_cap
& WLAN_RC_HT_FLAG
) {
1433 hthi
= ath_rc_setvalid_htrates(ath_rc_priv
,
1436 ath_rc_priv
->ht_cap
);
1438 hi
= A_MAX(hi
, hthi
);
1441 ath_rc_priv
->rate_table_size
= hi
+ 1;
1442 ath_rc_priv
->rate_max_phy
= 0;
1443 ASSERT(ath_rc_priv
->rate_table_size
<= RATE_TABLE_SIZE
);
1445 for (i
= 0, k
= 0; i
< WLAN_RC_PHY_MAX
; i
++) {
1446 for (j
= 0; j
< ath_rc_priv
->valid_phy_ratecnt
[i
]; j
++) {
1447 ath_rc_priv
->valid_rate_index
[k
++] =
1448 ath_rc_priv
->valid_phy_rateidx
[i
][j
];
1451 if (!ath_rc_valid_phyrate(i
, rate_table
->initial_ratemax
, 1)
1452 || !ath_rc_priv
->valid_phy_ratecnt
[i
])
1455 ath_rc_priv
->rate_max_phy
= ath_rc_priv
->valid_phy_rateidx
[i
][j
-1];
1457 ASSERT(ath_rc_priv
->rate_table_size
<= RATE_TABLE_SIZE
);
1458 ASSERT(k
<= RATE_TABLE_SIZE
);
1460 ath_rc_priv
->max_valid_rate
= k
;
1461 ath_rc_sort_validrates(rate_table
, ath_rc_priv
);
1462 ath_rc_priv
->rate_max_phy
= ath_rc_priv
->valid_rate_index
[k
-4];
1463 sc
->cur_rate_table
= rate_table
;
1465 DPRINTF(sc
, ATH_DBG_CONFIG
, "RC Initialized with capabilities: 0x%x\n",
1466 ath_rc_priv
->ht_cap
);
1469 static u8
ath_rc_build_ht_caps(struct ath_softc
*sc
, struct ieee80211_sta
*sta
,
1470 bool is_cw40
, bool is_sgi40
)
1474 if (sta
->ht_cap
.ht_supported
) {
1475 caps
= WLAN_RC_HT_FLAG
;
1476 if (sc
->sc_ah
->caps
.tx_chainmask
!= 1 &&
1477 ath9k_hw_getcapability(sc
->sc_ah
, ATH9K_CAP_DS
, 0, NULL
)) {
1478 if (sta
->ht_cap
.mcs
.rx_mask
[1])
1479 caps
|= WLAN_RC_DS_FLAG
;
1482 caps
|= WLAN_RC_40_FLAG
;
1484 caps
|= WLAN_RC_SGI_FLAG
;
1490 /***********************************/
1491 /* mac80211 Rate Control callbacks */
1492 /***********************************/
1494 static void ath_tx_status(void *priv
, struct ieee80211_supported_band
*sband
,
1495 struct ieee80211_sta
*sta
, void *priv_sta
,
1496 struct sk_buff
*skb
)
1498 struct ath_softc
*sc
= priv
;
1499 struct ath_rate_priv
*ath_rc_priv
= priv_sta
;
1500 struct ath_tx_info_priv
*tx_info_priv
= NULL
;
1501 struct ieee80211_tx_info
*tx_info
= IEEE80211_SKB_CB(skb
);
1502 struct ieee80211_hdr
*hdr
;
1503 int final_ts_idx
, tx_status
= 0, is_underrun
= 0;
1506 hdr
= (struct ieee80211_hdr
*)skb
->data
;
1507 fc
= hdr
->frame_control
;
1508 tx_info_priv
= ATH_TX_INFO_PRIV(tx_info
);
1509 final_ts_idx
= tx_info_priv
->tx
.ts_rateindex
;
1511 if (!priv_sta
|| !ieee80211_is_data(fc
) ||
1512 !tx_info_priv
->update_rc
)
1515 if (tx_info_priv
->tx
.ts_status
& ATH9K_TXERR_FILT
)
1519 * If underrun error is seen assume it as an excessive retry only
1520 * if prefetch trigger level have reached the max (0x3f for 5416)
1521 * Adjust the long retry as if the frame was tried ATH_11N_TXMAXTRY
1522 * times. This affects how ratectrl updates PER for the failed rate.
1524 if (tx_info_priv
->tx
.ts_flags
&
1525 (ATH9K_TX_DATA_UNDERRUN
| ATH9K_TX_DELIM_UNDERRUN
) &&
1526 ((sc
->sc_ah
->tx_trig_level
) >= ath_rc_priv
->tx_triglevel_max
)) {
1531 if ((tx_info_priv
->tx
.ts_status
& ATH9K_TXERR_XRETRY
) ||
1532 (tx_info_priv
->tx
.ts_status
& ATH9K_TXERR_FIFO
))
1535 ath_rc_tx_status(sc
, ath_rc_priv
, tx_info
, final_ts_idx
, tx_status
,
1536 (is_underrun
) ? ATH_11N_TXMAXTRY
:
1537 tx_info_priv
->tx
.ts_longretry
);
1539 /* Check if aggregation has to be enabled for this tid */
1540 if (conf_is_ht(&sc
->hw
->conf
) &&
1541 !(skb
->protocol
== cpu_to_be16(ETH_P_PAE
))) {
1542 if (ieee80211_is_data_qos(fc
)) {
1544 struct ath_node
*an
;
1546 qc
= ieee80211_get_qos_ctl(hdr
);
1548 an
= (struct ath_node
*)sta
->drv_priv
;
1550 if(ath_tx_aggr_check(sc
, an
, tid
))
1551 ieee80211_start_tx_ba_session(sc
->hw
, hdr
->addr1
, tid
);
1555 ath_debug_stat_rc(sc
, skb
);
1557 kfree(tx_info_priv
);
1560 static void ath_get_rate(void *priv
, struct ieee80211_sta
*sta
, void *priv_sta
,
1561 struct ieee80211_tx_rate_control
*txrc
)
1563 struct ieee80211_supported_band
*sband
= txrc
->sband
;
1564 struct sk_buff
*skb
= txrc
->skb
;
1565 struct ieee80211_hdr
*hdr
= (struct ieee80211_hdr
*)skb
->data
;
1566 struct ieee80211_tx_info
*tx_info
= IEEE80211_SKB_CB(skb
);
1567 struct ath_softc
*sc
= priv
;
1568 struct ath_rate_priv
*ath_rc_priv
= priv_sta
;
1569 __le16 fc
= hdr
->frame_control
;
1571 /* lowest rate for management and multicast/broadcast frames */
1572 if (!ieee80211_is_data(fc
) || is_multicast_ether_addr(hdr
->addr1
) ||
1574 tx_info
->control
.rates
[0].idx
= rate_lowest_index(sband
, sta
);
1575 tx_info
->control
.rates
[0].count
=
1576 is_multicast_ether_addr(hdr
->addr1
) ? 1 : ATH_MGT_TXMAXTRY
;
1580 /* Find tx rate for unicast frames */
1581 ath_rc_ratefind(sc
, ath_rc_priv
, txrc
);
1584 static void ath_rate_init(void *priv
, struct ieee80211_supported_band
*sband
,
1585 struct ieee80211_sta
*sta
, void *priv_sta
)
1587 struct ath_softc
*sc
= priv
;
1588 struct ath_rate_priv
*ath_rc_priv
= priv_sta
;
1589 struct ath_rate_table
*rate_table
= NULL
;
1590 bool is_cw40
, is_sgi40
;
1593 for (i
= 0; i
< sband
->n_bitrates
; i
++) {
1594 if (sta
->supp_rates
[sband
->band
] & BIT(i
)) {
1595 ath_rc_priv
->neg_rates
.rs_rates
[j
]
1596 = (sband
->bitrates
[i
].bitrate
* 2) / 10;
1600 ath_rc_priv
->neg_rates
.rs_nrates
= j
;
1602 if (sta
->ht_cap
.ht_supported
) {
1603 for (i
= 0, j
= 0; i
< 77; i
++) {
1604 if (sta
->ht_cap
.mcs
.rx_mask
[i
/8] & (1<<(i
%8)))
1605 ath_rc_priv
->neg_ht_rates
.rs_rates
[j
++] = i
;
1606 if (j
== ATH_RATE_MAX
)
1609 ath_rc_priv
->neg_ht_rates
.rs_nrates
= j
;
1612 is_cw40
= sta
->ht_cap
.cap
& IEEE80211_HT_CAP_SUP_WIDTH_20_40
;
1613 is_sgi40
= sta
->ht_cap
.cap
& IEEE80211_HT_CAP_SGI_40
;
1615 /* Choose rate table first */
1617 if ((sc
->sc_ah
->opmode
== NL80211_IFTYPE_STATION
) ||
1618 (sc
->sc_ah
->opmode
== NL80211_IFTYPE_MESH_POINT
) ||
1619 (sc
->sc_ah
->opmode
== NL80211_IFTYPE_ADHOC
)) {
1620 rate_table
= ath_choose_rate_table(sc
, sband
->band
,
1621 sta
->ht_cap
.ht_supported
,
1623 } else if (sc
->sc_ah
->opmode
== NL80211_IFTYPE_AP
) {
1624 /* cur_rate_table would be set on init through config() */
1625 rate_table
= sc
->cur_rate_table
;
1628 ath_rc_priv
->ht_cap
= ath_rc_build_ht_caps(sc
, sta
, is_cw40
, is_sgi40
);
1629 ath_rc_init(sc
, priv_sta
, sband
, sta
, rate_table
);
1632 static void ath_rate_update(void *priv
, struct ieee80211_supported_band
*sband
,
1633 struct ieee80211_sta
*sta
, void *priv_sta
,
1636 struct ath_softc
*sc
= priv
;
1637 struct ath_rate_priv
*ath_rc_priv
= priv_sta
;
1638 struct ath_rate_table
*rate_table
= NULL
;
1639 bool oper_cw40
= false, oper_sgi40
;
1640 bool local_cw40
= (ath_rc_priv
->ht_cap
& WLAN_RC_40_FLAG
) ?
1642 bool local_sgi40
= (ath_rc_priv
->ht_cap
& WLAN_RC_SGI_FLAG
) ?
1645 /* FIXME: Handle AP mode later when we support CWM */
1647 if (changed
& IEEE80211_RC_HT_CHANGED
) {
1648 if (sc
->sc_ah
->opmode
!= NL80211_IFTYPE_STATION
)
1651 if (sc
->hw
->conf
.channel_type
== NL80211_CHAN_HT40MINUS
||
1652 sc
->hw
->conf
.channel_type
== NL80211_CHAN_HT40PLUS
)
1655 oper_sgi40
= (sta
->ht_cap
.cap
& IEEE80211_HT_CAP_SGI_40
) ?
1658 if ((local_cw40
!= oper_cw40
) || (local_sgi40
!= oper_sgi40
)) {
1659 rate_table
= ath_choose_rate_table(sc
, sband
->band
,
1660 sta
->ht_cap
.ht_supported
,
1662 ath_rc_priv
->ht_cap
= ath_rc_build_ht_caps(sc
, sta
,
1663 oper_cw40
, oper_sgi40
);
1664 ath_rc_init(sc
, priv_sta
, sband
, sta
, rate_table
);
1666 DPRINTF(sc
, ATH_DBG_CONFIG
,
1667 "Operating HT Bandwidth changed to: %d\n",
1668 sc
->hw
->conf
.channel_type
);
1673 static void *ath_rate_alloc(struct ieee80211_hw
*hw
, struct dentry
*debugfsdir
)
1675 struct ath_wiphy
*aphy
= hw
->priv
;
1679 static void ath_rate_free(void *priv
)
1684 static void *ath_rate_alloc_sta(void *priv
, struct ieee80211_sta
*sta
, gfp_t gfp
)
1686 struct ath_softc
*sc
= priv
;
1687 struct ath_rate_priv
*rate_priv
;
1689 rate_priv
= kzalloc(sizeof(struct ath_rate_priv
), gfp
);
1691 DPRINTF(sc
, ATH_DBG_FATAL
,
1692 "Unable to allocate private rc structure\n");
1696 rate_priv
->rssi_down_time
= jiffies_to_msecs(jiffies
);
1697 rate_priv
->tx_triglevel_max
= sc
->sc_ah
->caps
.tx_triglevel_max
;
1702 static void ath_rate_free_sta(void *priv
, struct ieee80211_sta
*sta
,
1705 struct ath_rate_priv
*rate_priv
= priv_sta
;
1709 static struct rate_control_ops ath_rate_ops
= {
1711 .name
= "ath9k_rate_control",
1712 .tx_status
= ath_tx_status
,
1713 .get_rate
= ath_get_rate
,
1714 .rate_init
= ath_rate_init
,
1715 .rate_update
= ath_rate_update
,
1716 .alloc
= ath_rate_alloc
,
1717 .free
= ath_rate_free
,
1718 .alloc_sta
= ath_rate_alloc_sta
,
1719 .free_sta
= ath_rate_free_sta
,
1722 void ath_rate_attach(struct ath_softc
*sc
)
1724 sc
->hw_rate_table
[ATH9K_MODE_11B
] =
1725 &ar5416_11b_ratetable
;
1726 sc
->hw_rate_table
[ATH9K_MODE_11A
] =
1727 &ar5416_11a_ratetable
;
1728 sc
->hw_rate_table
[ATH9K_MODE_11G
] =
1729 &ar5416_11g_ratetable
;
1730 sc
->hw_rate_table
[ATH9K_MODE_11NA_HT20
] =
1731 &ar5416_11na_ratetable
;
1732 sc
->hw_rate_table
[ATH9K_MODE_11NG_HT20
] =
1733 &ar5416_11ng_ratetable
;
1734 sc
->hw_rate_table
[ATH9K_MODE_11NA_HT40PLUS
] =
1735 &ar5416_11na_ratetable
;
1736 sc
->hw_rate_table
[ATH9K_MODE_11NA_HT40MINUS
] =
1737 &ar5416_11na_ratetable
;
1738 sc
->hw_rate_table
[ATH9K_MODE_11NG_HT40PLUS
] =
1739 &ar5416_11ng_ratetable
;
1740 sc
->hw_rate_table
[ATH9K_MODE_11NG_HT40MINUS
] =
1741 &ar5416_11ng_ratetable
;
1744 int ath_rate_control_register(void)
1746 return ieee80211_rate_control_register(&ath_rate_ops
);
1749 void ath_rate_control_unregister(void)
1751 ieee80211_rate_control_unregister(&ath_rate_ops
);