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8ca151b5 JB |
1 | /****************************************************************************** |
2 | * | |
51368bf7 | 3 | * Copyright(c) 2005 - 2014 Intel Corporation. All rights reserved. |
fcc5e851 | 4 | * Copyright(c) 2013 - 2015 Intel Mobile Communications GmbH |
8ca151b5 JB |
5 | * |
6 | * This program is free software; you can redistribute it and/or modify it | |
7 | * under the terms of version 2 of the GNU General Public License as | |
8 | * published by the Free Software Foundation. | |
9 | * | |
10 | * This program is distributed in the hope that it will be useful, but WITHOUT | |
11 | * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or | |
12 | * FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License for | |
13 | * more details. | |
14 | * | |
15 | * You should have received a copy of the GNU General Public License along with | |
16 | * this program; if not, write to the Free Software Foundation, Inc., | |
17 | * 51 Franklin Street, Fifth Floor, Boston, MA 02110, USA | |
18 | * | |
19 | * The full GNU General Public License is included in this distribution in the | |
20 | * file called LICENSE. | |
21 | * | |
22 | * Contact Information: | |
23 | * Intel Linux Wireless <ilw@linux.intel.com> | |
24 | * Intel Corporation, 5200 N.E. Elam Young Parkway, Hillsboro, OR 97124-6497 | |
25 | * | |
26 | *****************************************************************************/ | |
27 | #include <linux/kernel.h> | |
8ca151b5 JB |
28 | #include <linux/skbuff.h> |
29 | #include <linux/slab.h> | |
30 | #include <net/mac80211.h> | |
31 | ||
32 | #include <linux/netdevice.h> | |
33 | #include <linux/etherdevice.h> | |
34 | #include <linux/delay.h> | |
35 | ||
36 | #include <linux/workqueue.h> | |
37 | #include "rs.h" | |
38 | #include "fw-api.h" | |
39 | #include "sta.h" | |
40 | #include "iwl-op-mode.h" | |
41 | #include "mvm.h" | |
1e9c62fa | 42 | #include "debugfs.h" |
8ca151b5 JB |
43 | |
44 | #define RS_NAME "iwl-mvm-rs" | |
45 | ||
8ca151b5 | 46 | #define IWL_RATE_MAX_WINDOW 62 /* # tx in history window */ |
8ca151b5 | 47 | |
834437da ES |
48 | /* Calculations of success ratio are done in fixed point where 12800 is 100%. |
49 | * Use this macro when dealing with thresholds consts set as a percentage | |
50 | */ | |
51 | #define RS_PERCENT(x) (128 * x) | |
8ca151b5 JB |
52 | |
53 | static u8 rs_ht_to_legacy[] = { | |
da87d7d5 ES |
54 | [IWL_RATE_MCS_0_INDEX] = IWL_RATE_6M_INDEX, |
55 | [IWL_RATE_MCS_1_INDEX] = IWL_RATE_9M_INDEX, | |
56 | [IWL_RATE_MCS_2_INDEX] = IWL_RATE_12M_INDEX, | |
57 | [IWL_RATE_MCS_3_INDEX] = IWL_RATE_18M_INDEX, | |
58 | [IWL_RATE_MCS_4_INDEX] = IWL_RATE_24M_INDEX, | |
59 | [IWL_RATE_MCS_5_INDEX] = IWL_RATE_36M_INDEX, | |
60 | [IWL_RATE_MCS_6_INDEX] = IWL_RATE_48M_INDEX, | |
61 | [IWL_RATE_MCS_7_INDEX] = IWL_RATE_54M_INDEX, | |
62 | [IWL_RATE_MCS_8_INDEX] = IWL_RATE_54M_INDEX, | |
63 | [IWL_RATE_MCS_9_INDEX] = IWL_RATE_54M_INDEX, | |
8ca151b5 JB |
64 | }; |
65 | ||
66 | static const u8 ant_toggle_lookup[] = { | |
ef4394b9 EP |
67 | [ANT_NONE] = ANT_NONE, |
68 | [ANT_A] = ANT_B, | |
69 | [ANT_B] = ANT_C, | |
70 | [ANT_AB] = ANT_BC, | |
71 | [ANT_C] = ANT_A, | |
72 | [ANT_AC] = ANT_AB, | |
73 | [ANT_BC] = ANT_AC, | |
74 | [ANT_ABC] = ANT_ABC, | |
8ca151b5 JB |
75 | }; |
76 | ||
d310e405 ES |
77 | #define IWL_DECLARE_RATE_INFO(r, s, rp, rn) \ |
78 | [IWL_RATE_##r##M_INDEX] = { IWL_RATE_##r##M_PLCP, \ | |
79 | IWL_RATE_HT_SISO_MCS_##s##_PLCP, \ | |
80 | IWL_RATE_HT_MIMO2_MCS_##s##_PLCP, \ | |
81 | IWL_RATE_VHT_SISO_MCS_##s##_PLCP, \ | |
82 | IWL_RATE_VHT_MIMO2_MCS_##s##_PLCP,\ | |
83 | IWL_RATE_##rp##M_INDEX, \ | |
ab055ce9 | 84 | IWL_RATE_##rn##M_INDEX } |
8ca151b5 | 85 | |
d310e405 ES |
86 | #define IWL_DECLARE_MCS_RATE(s) \ |
87 | [IWL_RATE_MCS_##s##_INDEX] = { IWL_RATE_INVM_PLCP, \ | |
88 | IWL_RATE_HT_SISO_MCS_##s##_PLCP, \ | |
89 | IWL_RATE_HT_MIMO2_MCS_##s##_PLCP, \ | |
90 | IWL_RATE_VHT_SISO_MCS_##s##_PLCP, \ | |
91 | IWL_RATE_VHT_MIMO2_MCS_##s##_PLCP, \ | |
92 | IWL_RATE_INVM_INDEX, \ | |
93 | IWL_RATE_INVM_INDEX } | |
94 | ||
8ca151b5 JB |
95 | /* |
96 | * Parameter order: | |
ab055ce9 | 97 | * rate, ht rate, prev rate, next rate |
8ca151b5 JB |
98 | * |
99 | * If there isn't a valid next or previous rate then INV is used which | |
100 | * maps to IWL_RATE_INVALID | |
101 | * | |
102 | */ | |
103 | static const struct iwl_rs_rate_info iwl_rates[IWL_RATE_COUNT] = { | |
ab055ce9 ES |
104 | IWL_DECLARE_RATE_INFO(1, INV, INV, 2), /* 1mbps */ |
105 | IWL_DECLARE_RATE_INFO(2, INV, 1, 5), /* 2mbps */ | |
106 | IWL_DECLARE_RATE_INFO(5, INV, 2, 11), /*5.5mbps */ | |
107 | IWL_DECLARE_RATE_INFO(11, INV, 9, 12), /* 11mbps */ | |
d310e405 ES |
108 | IWL_DECLARE_RATE_INFO(6, 0, 5, 11), /* 6mbps ; MCS 0 */ |
109 | IWL_DECLARE_RATE_INFO(9, INV, 6, 11), /* 9mbps */ | |
110 | IWL_DECLARE_RATE_INFO(12, 1, 11, 18), /* 12mbps ; MCS 1 */ | |
111 | IWL_DECLARE_RATE_INFO(18, 2, 12, 24), /* 18mbps ; MCS 2 */ | |
112 | IWL_DECLARE_RATE_INFO(24, 3, 18, 36), /* 24mbps ; MCS 3 */ | |
113 | IWL_DECLARE_RATE_INFO(36, 4, 24, 48), /* 36mbps ; MCS 4 */ | |
114 | IWL_DECLARE_RATE_INFO(48, 5, 36, 54), /* 48mbps ; MCS 5 */ | |
115 | IWL_DECLARE_RATE_INFO(54, 6, 48, INV), /* 54mbps ; MCS 6 */ | |
116 | IWL_DECLARE_MCS_RATE(7), /* MCS 7 */ | |
117 | IWL_DECLARE_MCS_RATE(8), /* MCS 8 */ | |
118 | IWL_DECLARE_MCS_RATE(9), /* MCS 9 */ | |
8ca151b5 JB |
119 | }; |
120 | ||
4e4b815c ES |
121 | enum rs_action { |
122 | RS_ACTION_STAY = 0, | |
123 | RS_ACTION_DOWNSCALE = -1, | |
124 | RS_ACTION_UPSCALE = 1, | |
125 | }; | |
126 | ||
b3b06a32 ES |
127 | enum rs_column_mode { |
128 | RS_INVALID = 0, | |
129 | RS_LEGACY, | |
130 | RS_SISO, | |
131 | RS_MIMO2, | |
132 | }; | |
133 | ||
fd7dbee5 | 134 | #define MAX_NEXT_COLUMNS 7 |
b3b06a32 ES |
135 | #define MAX_COLUMN_CHECKS 3 |
136 | ||
0b8d17f3 ES |
137 | struct rs_tx_column; |
138 | ||
b3b06a32 ES |
139 | typedef bool (*allow_column_func_t) (struct iwl_mvm *mvm, |
140 | struct ieee80211_sta *sta, | |
bb8f44c9 | 141 | struct rs_rate *rate, |
0b8d17f3 | 142 | const struct rs_tx_column *next_col); |
b3b06a32 ES |
143 | |
144 | struct rs_tx_column { | |
145 | enum rs_column_mode mode; | |
146 | u8 ant; | |
147 | bool sgi; | |
148 | enum rs_column next_columns[MAX_NEXT_COLUMNS]; | |
149 | allow_column_func_t checks[MAX_COLUMN_CHECKS]; | |
150 | }; | |
151 | ||
219fb66b | 152 | static bool rs_ant_allow(struct iwl_mvm *mvm, struct ieee80211_sta *sta, |
bb8f44c9 | 153 | struct rs_rate *rate, |
0b8d17f3 | 154 | const struct rs_tx_column *next_col) |
219fb66b | 155 | { |
0b8d17f3 | 156 | return iwl_mvm_bt_coex_is_ant_avail(mvm, next_col->ant); |
219fb66b EG |
157 | } |
158 | ||
b3b06a32 | 159 | static bool rs_mimo_allow(struct iwl_mvm *mvm, struct ieee80211_sta *sta, |
bb8f44c9 | 160 | struct rs_rate *rate, |
0b8d17f3 | 161 | const struct rs_tx_column *next_col) |
b3b06a32 | 162 | { |
7ac4a50a ES |
163 | struct iwl_mvm_sta *mvmsta; |
164 | struct iwl_mvm_vif *mvmvif; | |
165 | ||
b3b06a32 ES |
166 | if (!sta->ht_cap.ht_supported) |
167 | return false; | |
168 | ||
169 | if (sta->smps_mode == IEEE80211_SMPS_STATIC) | |
170 | return false; | |
171 | ||
a0544272 | 172 | if (num_of_ant(iwl_mvm_get_valid_tx_ant(mvm)) < 2) |
b3b06a32 ES |
173 | return false; |
174 | ||
175 | if (!iwl_mvm_bt_coex_is_mimo_allowed(mvm, sta)) | |
176 | return false; | |
177 | ||
7ac4a50a ES |
178 | mvmsta = iwl_mvm_sta_from_mac80211(sta); |
179 | mvmvif = iwl_mvm_vif_from_mac80211(mvmsta->vif); | |
7ac4a50a | 180 | |
5f0d98f2 EG |
181 | if (mvm->nvm_data->sku_cap_mimo_disabled) |
182 | return false; | |
183 | ||
b3b06a32 ES |
184 | return true; |
185 | } | |
186 | ||
187 | static bool rs_siso_allow(struct iwl_mvm *mvm, struct ieee80211_sta *sta, | |
bb8f44c9 | 188 | struct rs_rate *rate, |
0b8d17f3 | 189 | const struct rs_tx_column *next_col) |
b3b06a32 ES |
190 | { |
191 | if (!sta->ht_cap.ht_supported) | |
192 | return false; | |
193 | ||
194 | return true; | |
195 | } | |
196 | ||
197 | static bool rs_sgi_allow(struct iwl_mvm *mvm, struct ieee80211_sta *sta, | |
bb8f44c9 | 198 | struct rs_rate *rate, |
0b8d17f3 | 199 | const struct rs_tx_column *next_col) |
b3b06a32 | 200 | { |
b3b06a32 ES |
201 | struct ieee80211_sta_ht_cap *ht_cap = &sta->ht_cap; |
202 | struct ieee80211_sta_vht_cap *vht_cap = &sta->vht_cap; | |
203 | ||
204 | if (is_ht20(rate) && (ht_cap->cap & | |
205 | IEEE80211_HT_CAP_SGI_20)) | |
206 | return true; | |
207 | if (is_ht40(rate) && (ht_cap->cap & | |
208 | IEEE80211_HT_CAP_SGI_40)) | |
209 | return true; | |
210 | if (is_ht80(rate) && (vht_cap->cap & | |
211 | IEEE80211_VHT_CAP_SHORT_GI_80)) | |
212 | return true; | |
213 | ||
214 | return false; | |
215 | } | |
216 | ||
217 | static const struct rs_tx_column rs_tx_columns[] = { | |
218 | [RS_COLUMN_LEGACY_ANT_A] = { | |
219 | .mode = RS_LEGACY, | |
220 | .ant = ANT_A, | |
221 | .next_columns = { | |
222 | RS_COLUMN_LEGACY_ANT_B, | |
223 | RS_COLUMN_SISO_ANT_A, | |
31b20452 | 224 | RS_COLUMN_MIMO2, |
d8fff919 ES |
225 | RS_COLUMN_INVALID, |
226 | RS_COLUMN_INVALID, | |
fd7dbee5 ES |
227 | RS_COLUMN_INVALID, |
228 | RS_COLUMN_INVALID, | |
b3b06a32 | 229 | }, |
219fb66b EG |
230 | .checks = { |
231 | rs_ant_allow, | |
232 | }, | |
b3b06a32 ES |
233 | }, |
234 | [RS_COLUMN_LEGACY_ANT_B] = { | |
235 | .mode = RS_LEGACY, | |
236 | .ant = ANT_B, | |
237 | .next_columns = { | |
238 | RS_COLUMN_LEGACY_ANT_A, | |
239 | RS_COLUMN_SISO_ANT_B, | |
31b20452 | 240 | RS_COLUMN_MIMO2, |
d8fff919 ES |
241 | RS_COLUMN_INVALID, |
242 | RS_COLUMN_INVALID, | |
fd7dbee5 ES |
243 | RS_COLUMN_INVALID, |
244 | RS_COLUMN_INVALID, | |
b3b06a32 | 245 | }, |
219fb66b EG |
246 | .checks = { |
247 | rs_ant_allow, | |
248 | }, | |
b3b06a32 ES |
249 | }, |
250 | [RS_COLUMN_SISO_ANT_A] = { | |
251 | .mode = RS_SISO, | |
252 | .ant = ANT_A, | |
253 | .next_columns = { | |
254 | RS_COLUMN_SISO_ANT_B, | |
255 | RS_COLUMN_MIMO2, | |
256 | RS_COLUMN_SISO_ANT_A_SGI, | |
fd7dbee5 ES |
257 | RS_COLUMN_LEGACY_ANT_A, |
258 | RS_COLUMN_LEGACY_ANT_B, | |
d8fff919 | 259 | RS_COLUMN_INVALID, |
31b20452 | 260 | RS_COLUMN_INVALID, |
b3b06a32 ES |
261 | }, |
262 | .checks = { | |
263 | rs_siso_allow, | |
219fb66b | 264 | rs_ant_allow, |
b3b06a32 ES |
265 | }, |
266 | }, | |
267 | [RS_COLUMN_SISO_ANT_B] = { | |
268 | .mode = RS_SISO, | |
269 | .ant = ANT_B, | |
270 | .next_columns = { | |
271 | RS_COLUMN_SISO_ANT_A, | |
272 | RS_COLUMN_MIMO2, | |
273 | RS_COLUMN_SISO_ANT_B_SGI, | |
fd7dbee5 ES |
274 | RS_COLUMN_LEGACY_ANT_A, |
275 | RS_COLUMN_LEGACY_ANT_B, | |
d8fff919 | 276 | RS_COLUMN_INVALID, |
31b20452 | 277 | RS_COLUMN_INVALID, |
b3b06a32 ES |
278 | }, |
279 | .checks = { | |
280 | rs_siso_allow, | |
219fb66b | 281 | rs_ant_allow, |
b3b06a32 ES |
282 | }, |
283 | }, | |
284 | [RS_COLUMN_SISO_ANT_A_SGI] = { | |
285 | .mode = RS_SISO, | |
286 | .ant = ANT_A, | |
287 | .sgi = true, | |
288 | .next_columns = { | |
289 | RS_COLUMN_SISO_ANT_B_SGI, | |
290 | RS_COLUMN_MIMO2_SGI, | |
291 | RS_COLUMN_SISO_ANT_A, | |
fd7dbee5 ES |
292 | RS_COLUMN_LEGACY_ANT_A, |
293 | RS_COLUMN_LEGACY_ANT_B, | |
31b20452 ES |
294 | RS_COLUMN_INVALID, |
295 | RS_COLUMN_INVALID, | |
b3b06a32 ES |
296 | }, |
297 | .checks = { | |
298 | rs_siso_allow, | |
219fb66b | 299 | rs_ant_allow, |
b3b06a32 ES |
300 | rs_sgi_allow, |
301 | }, | |
302 | }, | |
303 | [RS_COLUMN_SISO_ANT_B_SGI] = { | |
304 | .mode = RS_SISO, | |
305 | .ant = ANT_B, | |
306 | .sgi = true, | |
307 | .next_columns = { | |
308 | RS_COLUMN_SISO_ANT_A_SGI, | |
309 | RS_COLUMN_MIMO2_SGI, | |
310 | RS_COLUMN_SISO_ANT_B, | |
fd7dbee5 ES |
311 | RS_COLUMN_LEGACY_ANT_A, |
312 | RS_COLUMN_LEGACY_ANT_B, | |
31b20452 ES |
313 | RS_COLUMN_INVALID, |
314 | RS_COLUMN_INVALID, | |
b3b06a32 ES |
315 | }, |
316 | .checks = { | |
317 | rs_siso_allow, | |
219fb66b | 318 | rs_ant_allow, |
b3b06a32 ES |
319 | rs_sgi_allow, |
320 | }, | |
321 | }, | |
322 | [RS_COLUMN_MIMO2] = { | |
323 | .mode = RS_MIMO2, | |
324 | .ant = ANT_AB, | |
325 | .next_columns = { | |
326 | RS_COLUMN_SISO_ANT_A, | |
327 | RS_COLUMN_MIMO2_SGI, | |
fd7dbee5 ES |
328 | RS_COLUMN_LEGACY_ANT_A, |
329 | RS_COLUMN_LEGACY_ANT_B, | |
31b20452 ES |
330 | RS_COLUMN_INVALID, |
331 | RS_COLUMN_INVALID, | |
332 | RS_COLUMN_INVALID, | |
b3b06a32 ES |
333 | }, |
334 | .checks = { | |
335 | rs_mimo_allow, | |
336 | }, | |
337 | }, | |
338 | [RS_COLUMN_MIMO2_SGI] = { | |
339 | .mode = RS_MIMO2, | |
340 | .ant = ANT_AB, | |
341 | .sgi = true, | |
342 | .next_columns = { | |
343 | RS_COLUMN_SISO_ANT_A_SGI, | |
344 | RS_COLUMN_MIMO2, | |
fd7dbee5 ES |
345 | RS_COLUMN_LEGACY_ANT_A, |
346 | RS_COLUMN_LEGACY_ANT_B, | |
31b20452 ES |
347 | RS_COLUMN_INVALID, |
348 | RS_COLUMN_INVALID, | |
349 | RS_COLUMN_INVALID, | |
b3b06a32 ES |
350 | }, |
351 | .checks = { | |
352 | rs_mimo_allow, | |
353 | rs_sgi_allow, | |
354 | }, | |
355 | }, | |
356 | }; | |
357 | ||
8ca151b5 JB |
358 | static inline u8 rs_extract_rate(u32 rate_n_flags) |
359 | { | |
360 | /* also works for HT because bits 7:6 are zero there */ | |
361 | return (u8)(rate_n_flags & RATE_LEGACY_RATE_MSK); | |
362 | } | |
363 | ||
364 | static int iwl_hwrate_to_plcp_idx(u32 rate_n_flags) | |
365 | { | |
366 | int idx = 0; | |
367 | ||
8ca151b5 | 368 | if (rate_n_flags & RATE_MCS_HT_MSK) { |
d310e405 ES |
369 | idx = rate_n_flags & RATE_HT_MCS_RATE_CODE_MSK; |
370 | idx += IWL_RATE_MCS_0_INDEX; | |
8ca151b5 | 371 | |
d310e405 | 372 | /* skip 9M not supported in HT*/ |
8ca151b5 JB |
373 | if (idx >= IWL_RATE_9M_INDEX) |
374 | idx += 1; | |
4e82dd3a | 375 | if ((idx >= IWL_FIRST_HT_RATE) && (idx <= IWL_LAST_HT_RATE)) |
8ca151b5 | 376 | return idx; |
d310e405 ES |
377 | } else if (rate_n_flags & RATE_MCS_VHT_MSK) { |
378 | idx = rate_n_flags & RATE_VHT_MCS_RATE_CODE_MSK; | |
379 | idx += IWL_RATE_MCS_0_INDEX; | |
8ca151b5 | 380 | |
d310e405 ES |
381 | /* skip 9M not supported in VHT*/ |
382 | if (idx >= IWL_RATE_9M_INDEX) | |
383 | idx++; | |
384 | if ((idx >= IWL_FIRST_VHT_RATE) && (idx <= IWL_LAST_VHT_RATE)) | |
385 | return idx; | |
8ca151b5 | 386 | } else { |
d310e405 ES |
387 | /* legacy rate format, search for match in table */ |
388 | ||
389 | u8 legacy_rate = rs_extract_rate(rate_n_flags); | |
8ca151b5 | 390 | for (idx = 0; idx < ARRAY_SIZE(iwl_rates); idx++) |
d310e405 | 391 | if (iwl_rates[idx].plcp == legacy_rate) |
8ca151b5 JB |
392 | return idx; |
393 | } | |
394 | ||
560843f4 | 395 | return IWL_RATE_INVALID; |
8ca151b5 JB |
396 | } |
397 | ||
398 | static void rs_rate_scale_perform(struct iwl_mvm *mvm, | |
1ebc8f2e ES |
399 | struct ieee80211_sta *sta, |
400 | struct iwl_lq_sta *lq_sta, | |
401 | int tid); | |
8fc7c58c ES |
402 | static void rs_fill_lq_cmd(struct iwl_mvm *mvm, |
403 | struct ieee80211_sta *sta, | |
404 | struct iwl_lq_sta *lq_sta, | |
405 | const struct rs_rate *initial_rate); | |
8ca151b5 | 406 | static void rs_stay_in_table(struct iwl_lq_sta *lq_sta, bool force_search); |
8ca151b5 | 407 | |
8ca151b5 JB |
408 | /** |
409 | * The following tables contain the expected throughput metrics for all rates | |
410 | * | |
411 | * 1, 2, 5.5, 11, 6, 9, 12, 18, 24, 36, 48, 54, 60 MBits | |
412 | * | |
413 | * where invalid entries are zeros. | |
414 | * | |
415 | * CCK rates are only valid in legacy table and will only be used in G | |
416 | * (2.4 GHz) band. | |
417 | */ | |
418 | ||
a34529e8 | 419 | static const u16 expected_tpt_legacy[IWL_RATE_COUNT] = { |
4e82dd3a | 420 | 7, 13, 35, 58, 40, 57, 72, 98, 121, 154, 177, 186, 0, 0, 0 |
8ca151b5 JB |
421 | }; |
422 | ||
4e82dd3a ES |
423 | /* Expected TpT tables. 4 indexes: |
424 | * 0 - NGI, 1 - SGI, 2 - AGG+NGI, 3 - AGG+SGI | |
425 | */ | |
a34529e8 | 426 | static const u16 expected_tpt_siso_20MHz[4][IWL_RATE_COUNT] = { |
4e82dd3a ES |
427 | {0, 0, 0, 0, 42, 0, 76, 102, 124, 159, 183, 193, 202, 216, 0}, |
428 | {0, 0, 0, 0, 46, 0, 82, 110, 132, 168, 192, 202, 210, 225, 0}, | |
429 | {0, 0, 0, 0, 49, 0, 97, 145, 192, 285, 375, 420, 464, 551, 0}, | |
430 | {0, 0, 0, 0, 54, 0, 108, 160, 213, 315, 415, 465, 513, 608, 0}, | |
8ca151b5 JB |
431 | }; |
432 | ||
a34529e8 | 433 | static const u16 expected_tpt_siso_40MHz[4][IWL_RATE_COUNT] = { |
4e82dd3a ES |
434 | {0, 0, 0, 0, 77, 0, 127, 160, 184, 220, 242, 250, 257, 269, 275}, |
435 | {0, 0, 0, 0, 83, 0, 135, 169, 193, 229, 250, 257, 264, 275, 280}, | |
436 | {0, 0, 0, 0, 101, 0, 199, 295, 389, 570, 744, 828, 911, 1070, 1173}, | |
437 | {0, 0, 0, 0, 112, 0, 220, 326, 429, 629, 819, 912, 1000, 1173, 1284}, | |
8ca151b5 JB |
438 | }; |
439 | ||
a34529e8 | 440 | static const u16 expected_tpt_siso_80MHz[4][IWL_RATE_COUNT] = { |
d310e405 ES |
441 | {0, 0, 0, 0, 130, 0, 191, 223, 244, 273, 288, 294, 298, 305, 308}, |
442 | {0, 0, 0, 0, 138, 0, 200, 231, 251, 279, 293, 298, 302, 308, 312}, | |
443 | {0, 0, 0, 0, 217, 0, 429, 634, 834, 1220, 1585, 1760, 1931, 2258, 2466}, | |
444 | {0, 0, 0, 0, 241, 0, 475, 701, 921, 1343, 1741, 1931, 2117, 2468, 2691}, | |
445 | }; | |
446 | ||
a34529e8 | 447 | static const u16 expected_tpt_mimo2_20MHz[4][IWL_RATE_COUNT] = { |
4e82dd3a ES |
448 | {0, 0, 0, 0, 74, 0, 123, 155, 179, 213, 235, 243, 250, 261, 0}, |
449 | {0, 0, 0, 0, 81, 0, 131, 164, 187, 221, 242, 250, 256, 267, 0}, | |
450 | {0, 0, 0, 0, 98, 0, 193, 286, 375, 550, 718, 799, 878, 1032, 0}, | |
451 | {0, 0, 0, 0, 109, 0, 214, 316, 414, 607, 790, 879, 965, 1132, 0}, | |
8ca151b5 JB |
452 | }; |
453 | ||
a34529e8 | 454 | static const u16 expected_tpt_mimo2_40MHz[4][IWL_RATE_COUNT] = { |
4e82dd3a ES |
455 | {0, 0, 0, 0, 123, 0, 182, 214, 235, 264, 279, 285, 289, 296, 300}, |
456 | {0, 0, 0, 0, 131, 0, 191, 222, 242, 270, 284, 289, 293, 300, 303}, | |
457 | {0, 0, 0, 0, 200, 0, 390, 571, 741, 1067, 1365, 1505, 1640, 1894, 2053}, | |
458 | {0, 0, 0, 0, 221, 0, 430, 630, 816, 1169, 1490, 1641, 1784, 2053, 2221}, | |
8ca151b5 JB |
459 | }; |
460 | ||
a34529e8 | 461 | static const u16 expected_tpt_mimo2_80MHz[4][IWL_RATE_COUNT] = { |
d310e405 ES |
462 | {0, 0, 0, 0, 182, 0, 240, 264, 278, 299, 308, 311, 313, 317, 319}, |
463 | {0, 0, 0, 0, 190, 0, 247, 269, 282, 302, 310, 313, 315, 319, 320}, | |
464 | {0, 0, 0, 0, 428, 0, 833, 1215, 1577, 2254, 2863, 3147, 3418, 3913, 4219}, | |
465 | {0, 0, 0, 0, 474, 0, 920, 1338, 1732, 2464, 3116, 3418, 3705, 4225, 4545}, | |
466 | }; | |
467 | ||
8ca151b5 JB |
468 | /* mbps, mcs */ |
469 | static const struct iwl_rate_mcs_info iwl_rate_mcs[IWL_RATE_COUNT] = { | |
470 | { "1", "BPSK DSSS"}, | |
471 | { "2", "QPSK DSSS"}, | |
472 | {"5.5", "BPSK CCK"}, | |
473 | { "11", "QPSK CCK"}, | |
474 | { "6", "BPSK 1/2"}, | |
475 | { "9", "BPSK 1/2"}, | |
476 | { "12", "QPSK 1/2"}, | |
477 | { "18", "QPSK 3/4"}, | |
478 | { "24", "16QAM 1/2"}, | |
479 | { "36", "16QAM 3/4"}, | |
480 | { "48", "64QAM 2/3"}, | |
481 | { "54", "64QAM 3/4"}, | |
482 | { "60", "64QAM 5/6"}, | |
483 | }; | |
484 | ||
485 | #define MCS_INDEX_PER_STREAM (8) | |
486 | ||
9d10849e EG |
487 | static const char *rs_pretty_ant(u8 ant) |
488 | { | |
489 | static const char * const ant_name[] = { | |
490 | [ANT_NONE] = "None", | |
491 | [ANT_A] = "A", | |
492 | [ANT_B] = "B", | |
493 | [ANT_AB] = "AB", | |
494 | [ANT_C] = "C", | |
495 | [ANT_AC] = "AC", | |
496 | [ANT_BC] = "BC", | |
497 | [ANT_ABC] = "ABC", | |
498 | }; | |
499 | ||
500 | if (ant > ANT_ABC) | |
501 | return "UNKNOWN"; | |
502 | ||
503 | return ant_name[ant]; | |
504 | } | |
505 | ||
506 | static const char *rs_pretty_lq_type(enum iwl_table_type type) | |
507 | { | |
508 | static const char * const lq_types[] = { | |
509 | [LQ_NONE] = "NONE", | |
510 | [LQ_LEGACY_A] = "LEGACY_A", | |
511 | [LQ_LEGACY_G] = "LEGACY_G", | |
512 | [LQ_HT_SISO] = "HT SISO", | |
513 | [LQ_HT_MIMO2] = "HT MIMO", | |
514 | [LQ_VHT_SISO] = "VHT SISO", | |
515 | [LQ_VHT_MIMO2] = "VHT MIMO", | |
516 | }; | |
517 | ||
518 | if (type < LQ_NONE || type >= LQ_MAX) | |
519 | return "UNKNOWN"; | |
520 | ||
521 | return lq_types[type]; | |
522 | } | |
523 | ||
cc60c6e9 ES |
524 | static char *rs_pretty_rate(const struct rs_rate *rate) |
525 | { | |
526 | static char buf[40]; | |
527 | static const char * const legacy_rates[] = { | |
528 | [IWL_RATE_1M_INDEX] = "1M", | |
529 | [IWL_RATE_2M_INDEX] = "2M", | |
530 | [IWL_RATE_5M_INDEX] = "5.5M", | |
531 | [IWL_RATE_11M_INDEX] = "11M", | |
532 | [IWL_RATE_6M_INDEX] = "6M", | |
533 | [IWL_RATE_9M_INDEX] = "9M", | |
534 | [IWL_RATE_12M_INDEX] = "12M", | |
535 | [IWL_RATE_18M_INDEX] = "18M", | |
536 | [IWL_RATE_24M_INDEX] = "24M", | |
537 | [IWL_RATE_36M_INDEX] = "36M", | |
538 | [IWL_RATE_48M_INDEX] = "48M", | |
539 | [IWL_RATE_54M_INDEX] = "54M", | |
540 | }; | |
541 | static const char *const ht_vht_rates[] = { | |
542 | [IWL_RATE_MCS_0_INDEX] = "MCS0", | |
543 | [IWL_RATE_MCS_1_INDEX] = "MCS1", | |
544 | [IWL_RATE_MCS_2_INDEX] = "MCS2", | |
545 | [IWL_RATE_MCS_3_INDEX] = "MCS3", | |
546 | [IWL_RATE_MCS_4_INDEX] = "MCS4", | |
547 | [IWL_RATE_MCS_5_INDEX] = "MCS5", | |
548 | [IWL_RATE_MCS_6_INDEX] = "MCS6", | |
549 | [IWL_RATE_MCS_7_INDEX] = "MCS7", | |
550 | [IWL_RATE_MCS_8_INDEX] = "MCS8", | |
551 | [IWL_RATE_MCS_9_INDEX] = "MCS9", | |
552 | }; | |
553 | const char *rate_str; | |
554 | ||
e8b3f7b6 | 555 | if (is_type_legacy(rate->type) && (rate->index <= IWL_RATE_54M_INDEX)) |
cc60c6e9 | 556 | rate_str = legacy_rates[rate->index]; |
e8b3f7b6 ES |
557 | else if ((is_type_ht(rate->type) || is_type_vht(rate->type)) && |
558 | (rate->index <= IWL_RATE_MCS_9_INDEX)) | |
cc60c6e9 ES |
559 | rate_str = ht_vht_rates[rate->index]; |
560 | else | |
561 | rate_str = "BAD_RATE"; | |
562 | ||
563 | sprintf(buf, "(%s|%s|%s)", rs_pretty_lq_type(rate->type), | |
564 | rs_pretty_ant(rate->ant), rate_str); | |
565 | return buf; | |
566 | } | |
567 | ||
5aa33553 ES |
568 | static inline void rs_dump_rate(struct iwl_mvm *mvm, const struct rs_rate *rate, |
569 | const char *prefix) | |
570 | { | |
d8bafeaf | 571 | IWL_DEBUG_RATE(mvm, |
cc60c6e9 ES |
572 | "%s: %s BW: %d SGI: %d LDPC: %d STBC: %d\n", |
573 | prefix, rs_pretty_rate(rate), rate->bw, | |
574 | rate->sgi, rate->ldpc, rate->stbc); | |
5aa33553 ES |
575 | } |
576 | ||
8ca151b5 JB |
577 | static void rs_rate_scale_clear_window(struct iwl_rate_scale_data *window) |
578 | { | |
579 | window->data = 0; | |
580 | window->success_counter = 0; | |
581 | window->success_ratio = IWL_INVALID_VALUE; | |
582 | window->counter = 0; | |
583 | window->average_tpt = IWL_INVALID_VALUE; | |
8ca151b5 JB |
584 | } |
585 | ||
b804eeb6 ES |
586 | static void rs_rate_scale_clear_tbl_windows(struct iwl_mvm *mvm, |
587 | struct iwl_scale_tbl_info *tbl) | |
3ca71f60 EP |
588 | { |
589 | int i; | |
590 | ||
b804eeb6 | 591 | IWL_DEBUG_RATE(mvm, "Clearing up window stats\n"); |
3ca71f60 EP |
592 | for (i = 0; i < IWL_RATE_COUNT; i++) |
593 | rs_rate_scale_clear_window(&tbl->win[i]); | |
2fd647f8 EP |
594 | |
595 | for (i = 0; i < ARRAY_SIZE(tbl->tpc_win); i++) | |
596 | rs_rate_scale_clear_window(&tbl->tpc_win[i]); | |
3ca71f60 EP |
597 | } |
598 | ||
8ca151b5 JB |
599 | static inline u8 rs_is_valid_ant(u8 valid_antenna, u8 ant_type) |
600 | { | |
601 | return (ant_type & valid_antenna) == ant_type; | |
602 | } | |
603 | ||
8ca151b5 | 604 | static int rs_tl_turn_on_agg_for_tid(struct iwl_mvm *mvm, |
40ce5ed1 ES |
605 | struct iwl_lq_sta *lq_data, u8 tid, |
606 | struct ieee80211_sta *sta) | |
8ca151b5 JB |
607 | { |
608 | int ret = -EAGAIN; | |
8ca151b5 | 609 | |
44cc429c EG |
610 | IWL_DEBUG_HT(mvm, "Starting Tx agg: STA: %pM tid: %d\n", |
611 | sta->addr, tid); | |
612 | ret = ieee80211_start_tx_ba_session(sta, tid, 5000); | |
613 | if (ret == -EAGAIN) { | |
614 | /* | |
615 | * driver and mac80211 is out of sync | |
616 | * this might be cause by reloading firmware | |
617 | * stop the tx ba session here | |
618 | */ | |
619 | IWL_ERR(mvm, "Fail start Tx agg on tid: %d\n", | |
620 | tid); | |
621 | ieee80211_stop_tx_ba_session(sta, tid); | |
8ca151b5 JB |
622 | } |
623 | return ret; | |
624 | } | |
625 | ||
626 | static void rs_tl_turn_on_agg(struct iwl_mvm *mvm, u8 tid, | |
627 | struct iwl_lq_sta *lq_data, | |
628 | struct ieee80211_sta *sta) | |
629 | { | |
630 | if (tid < IWL_MAX_TID_COUNT) | |
631 | rs_tl_turn_on_agg_for_tid(mvm, lq_data, tid, sta); | |
632 | else | |
633 | IWL_ERR(mvm, "tid exceeds max TID count: %d/%d\n", | |
634 | tid, IWL_MAX_TID_COUNT); | |
635 | } | |
636 | ||
637 | static inline int get_num_of_ant_from_rate(u32 rate_n_flags) | |
638 | { | |
639 | return !!(rate_n_flags & RATE_MCS_ANT_A_MSK) + | |
640 | !!(rate_n_flags & RATE_MCS_ANT_B_MSK) + | |
641 | !!(rate_n_flags & RATE_MCS_ANT_C_MSK); | |
642 | } | |
643 | ||
644 | /* | |
645 | * Static function to get the expected throughput from an iwl_scale_tbl_info | |
646 | * that wraps a NULL pointer check | |
647 | */ | |
648 | static s32 get_expected_tpt(struct iwl_scale_tbl_info *tbl, int rs_index) | |
649 | { | |
650 | if (tbl->expected_tpt) | |
651 | return tbl->expected_tpt[rs_index]; | |
652 | return 0; | |
653 | } | |
654 | ||
655 | /** | |
656 | * rs_collect_tx_data - Update the success/failure sliding window | |
657 | * | |
658 | * We keep a sliding window of the last 62 packets transmitted | |
659 | * at this rate. window->data contains the bitmask of successful | |
660 | * packets. | |
661 | */ | |
834437da ES |
662 | static int _rs_collect_tx_data(struct iwl_mvm *mvm, |
663 | struct iwl_scale_tbl_info *tbl, | |
0bd3c5a7 EP |
664 | int scale_index, int attempts, int successes, |
665 | struct iwl_rate_scale_data *window) | |
8ca151b5 | 666 | { |
8ca151b5 JB |
667 | static const u64 mask = (((u64)1) << (IWL_RATE_MAX_WINDOW - 1)); |
668 | s32 fail_count, tpt; | |
669 | ||
8ca151b5 JB |
670 | /* Get expected throughput */ |
671 | tpt = get_expected_tpt(tbl, scale_index); | |
672 | ||
673 | /* | |
674 | * Keep track of only the latest 62 tx frame attempts in this rate's | |
675 | * history window; anything older isn't really relevant any more. | |
676 | * If we have filled up the sliding window, drop the oldest attempt; | |
677 | * if the oldest attempt (highest bit in bitmap) shows "success", | |
678 | * subtract "1" from the success counter (this is the main reason | |
679 | * we keep these bitmaps!). | |
680 | */ | |
681 | while (attempts > 0) { | |
682 | if (window->counter >= IWL_RATE_MAX_WINDOW) { | |
683 | /* remove earliest */ | |
684 | window->counter = IWL_RATE_MAX_WINDOW - 1; | |
685 | ||
686 | if (window->data & mask) { | |
687 | window->data &= ~mask; | |
688 | window->success_counter--; | |
689 | } | |
690 | } | |
691 | ||
692 | /* Increment frames-attempted counter */ | |
693 | window->counter++; | |
694 | ||
695 | /* Shift bitmap by one frame to throw away oldest history */ | |
696 | window->data <<= 1; | |
697 | ||
698 | /* Mark the most recent #successes attempts as successful */ | |
699 | if (successes > 0) { | |
700 | window->success_counter++; | |
701 | window->data |= 0x1; | |
702 | successes--; | |
703 | } | |
704 | ||
705 | attempts--; | |
706 | } | |
707 | ||
708 | /* Calculate current success ratio, avoid divide-by-0! */ | |
709 | if (window->counter > 0) | |
710 | window->success_ratio = 128 * (100 * window->success_counter) | |
711 | / window->counter; | |
712 | else | |
713 | window->success_ratio = IWL_INVALID_VALUE; | |
714 | ||
715 | fail_count = window->counter - window->success_counter; | |
716 | ||
717 | /* Calculate average throughput, if we have enough history. */ | |
834437da ES |
718 | if ((fail_count >= IWL_MVM_RS_RATE_MIN_FAILURE_TH) || |
719 | (window->success_counter >= IWL_MVM_RS_RATE_MIN_SUCCESS_TH)) | |
8ca151b5 JB |
720 | window->average_tpt = (window->success_ratio * tpt + 64) / 128; |
721 | else | |
722 | window->average_tpt = IWL_INVALID_VALUE; | |
723 | ||
8ca151b5 JB |
724 | return 0; |
725 | } | |
726 | ||
834437da ES |
727 | static int rs_collect_tx_data(struct iwl_mvm *mvm, |
728 | struct iwl_lq_sta *lq_sta, | |
757cf23b | 729 | struct iwl_scale_tbl_info *tbl, |
2fd647f8 EP |
730 | int scale_index, int attempts, int successes, |
731 | u8 reduced_txp) | |
0bd3c5a7 EP |
732 | { |
733 | struct iwl_rate_scale_data *window = NULL; | |
2fd647f8 | 734 | int ret; |
0bd3c5a7 EP |
735 | |
736 | if (scale_index < 0 || scale_index >= IWL_RATE_COUNT) | |
737 | return -EINVAL; | |
738 | ||
757cf23b | 739 | if (tbl->column != RS_COLUMN_INVALID) { |
f58220f6 ES |
740 | struct lq_sta_pers *pers = &lq_sta->pers; |
741 | ||
742 | pers->tx_stats[tbl->column][scale_index].total += attempts; | |
743 | pers->tx_stats[tbl->column][scale_index].success += successes; | |
757cf23b ES |
744 | } |
745 | ||
0bd3c5a7 EP |
746 | /* Select window for current tx bit rate */ |
747 | window = &(tbl->win[scale_index]); | |
748 | ||
834437da | 749 | ret = _rs_collect_tx_data(mvm, tbl, scale_index, attempts, successes, |
2fd647f8 EP |
750 | window); |
751 | if (ret) | |
752 | return ret; | |
753 | ||
754 | if (WARN_ON_ONCE(reduced_txp > TPC_MAX_REDUCTION)) | |
755 | return -EINVAL; | |
756 | ||
757 | window = &tbl->tpc_win[reduced_txp]; | |
834437da | 758 | return _rs_collect_tx_data(mvm, tbl, scale_index, attempts, successes, |
0bd3c5a7 EP |
759 | window); |
760 | } | |
761 | ||
5aa33553 ES |
762 | /* Convert rs_rate object into ucode rate bitmask */ |
763 | static u32 ucode_rate_from_rs_rate(struct iwl_mvm *mvm, | |
8fc7c58c | 764 | struct rs_rate *rate) |
8ca151b5 | 765 | { |
5aa33553 ES |
766 | u32 ucode_rate = 0; |
767 | int index = rate->index; | |
8ca151b5 | 768 | |
5aa33553 | 769 | ucode_rate |= ((rate->ant << RATE_MCS_ANT_POS) & |
d310e405 ES |
770 | RATE_MCS_ANT_ABC_MSK); |
771 | ||
5aa33553 ES |
772 | if (is_legacy(rate)) { |
773 | ucode_rate |= iwl_rates[index].plcp; | |
8ca151b5 | 774 | if (index >= IWL_FIRST_CCK_RATE && index <= IWL_LAST_CCK_RATE) |
5aa33553 ES |
775 | ucode_rate |= RATE_MCS_CCK_MSK; |
776 | return ucode_rate; | |
d310e405 ES |
777 | } |
778 | ||
5aa33553 | 779 | if (is_ht(rate)) { |
d310e405 | 780 | if (index < IWL_FIRST_HT_RATE || index > IWL_LAST_HT_RATE) { |
8ca151b5 | 781 | IWL_ERR(mvm, "Invalid HT rate index %d\n", index); |
4e82dd3a | 782 | index = IWL_LAST_HT_RATE; |
8ca151b5 | 783 | } |
5aa33553 | 784 | ucode_rate |= RATE_MCS_HT_MSK; |
8ca151b5 | 785 | |
5aa33553 ES |
786 | if (is_ht_siso(rate)) |
787 | ucode_rate |= iwl_rates[index].plcp_ht_siso; | |
788 | else if (is_ht_mimo2(rate)) | |
789 | ucode_rate |= iwl_rates[index].plcp_ht_mimo2; | |
8ca151b5 | 790 | else |
d972ab31 | 791 | WARN_ON_ONCE(1); |
5aa33553 | 792 | } else if (is_vht(rate)) { |
d310e405 ES |
793 | if (index < IWL_FIRST_VHT_RATE || index > IWL_LAST_VHT_RATE) { |
794 | IWL_ERR(mvm, "Invalid VHT rate index %d\n", index); | |
795 | index = IWL_LAST_VHT_RATE; | |
796 | } | |
5aa33553 ES |
797 | ucode_rate |= RATE_MCS_VHT_MSK; |
798 | if (is_vht_siso(rate)) | |
799 | ucode_rate |= iwl_rates[index].plcp_vht_siso; | |
800 | else if (is_vht_mimo2(rate)) | |
801 | ucode_rate |= iwl_rates[index].plcp_vht_mimo2; | |
d310e405 ES |
802 | else |
803 | WARN_ON_ONCE(1); | |
804 | ||
8ca151b5 | 805 | } else { |
5aa33553 | 806 | IWL_ERR(mvm, "Invalid rate->type %d\n", rate->type); |
8ca151b5 JB |
807 | } |
808 | ||
d8bafeaf ES |
809 | if (is_siso(rate) && rate->stbc) { |
810 | /* To enable STBC we need to set both a flag and ANT_AB */ | |
811 | ucode_rate |= RATE_MCS_ANT_AB_MSK; | |
812 | ucode_rate |= RATE_MCS_VHT_STBC_MSK; | |
813 | } | |
814 | ||
5aa33553 ES |
815 | ucode_rate |= rate->bw; |
816 | if (rate->sgi) | |
817 | ucode_rate |= RATE_MCS_SGI_MSK; | |
a3576ff2 ES |
818 | if (rate->ldpc) |
819 | ucode_rate |= RATE_MCS_LDPC_MSK; | |
d310e405 | 820 | |
5aa33553 | 821 | return ucode_rate; |
8ca151b5 JB |
822 | } |
823 | ||
5aa33553 ES |
824 | /* Convert a ucode rate into an rs_rate object */ |
825 | static int rs_rate_from_ucode_rate(const u32 ucode_rate, | |
826 | enum ieee80211_band band, | |
827 | struct rs_rate *rate) | |
8ca151b5 | 828 | { |
5aa33553 ES |
829 | u32 ant_msk = ucode_rate & RATE_MCS_ANT_ABC_MSK; |
830 | u8 num_of_ant = get_num_of_ant_from_rate(ucode_rate); | |
d310e405 | 831 | u8 nss; |
8ca151b5 | 832 | |
9e898f1b | 833 | memset(rate, 0, sizeof(*rate)); |
5aa33553 | 834 | rate->index = iwl_hwrate_to_plcp_idx(ucode_rate); |
8ca151b5 | 835 | |
560843f4 | 836 | if (rate->index == IWL_RATE_INVALID) |
8ca151b5 | 837 | return -EINVAL; |
5aa33553 ES |
838 | |
839 | rate->ant = (ant_msk >> RATE_MCS_ANT_POS); | |
8ca151b5 | 840 | |
d310e405 | 841 | /* Legacy */ |
5aa33553 ES |
842 | if (!(ucode_rate & RATE_MCS_HT_MSK) && |
843 | !(ucode_rate & RATE_MCS_VHT_MSK)) { | |
8ca151b5 JB |
844 | if (num_of_ant == 1) { |
845 | if (band == IEEE80211_BAND_5GHZ) | |
5aa33553 | 846 | rate->type = LQ_LEGACY_A; |
8ca151b5 | 847 | else |
5aa33553 | 848 | rate->type = LQ_LEGACY_G; |
8ca151b5 | 849 | } |
d310e405 ES |
850 | |
851 | return 0; | |
852 | } | |
853 | ||
854 | /* HT or VHT */ | |
5aa33553 ES |
855 | if (ucode_rate & RATE_MCS_SGI_MSK) |
856 | rate->sgi = true; | |
a3576ff2 ES |
857 | if (ucode_rate & RATE_MCS_LDPC_MSK) |
858 | rate->ldpc = true; | |
d8bafeaf ES |
859 | if (ucode_rate & RATE_MCS_VHT_STBC_MSK) |
860 | rate->stbc = true; | |
ba69d0e3 ES |
861 | if (ucode_rate & RATE_MCS_BF_MSK) |
862 | rate->bfer = true; | |
d310e405 | 863 | |
5aa33553 | 864 | rate->bw = ucode_rate & RATE_MCS_CHAN_WIDTH_MSK; |
d310e405 | 865 | |
5aa33553 ES |
866 | if (ucode_rate & RATE_MCS_HT_MSK) { |
867 | nss = ((ucode_rate & RATE_HT_MCS_NSS_MSK) >> | |
d310e405 ES |
868 | RATE_HT_MCS_NSS_POS) + 1; |
869 | ||
870 | if (nss == 1) { | |
5aa33553 | 871 | rate->type = LQ_HT_SISO; |
ba69d0e3 ES |
872 | WARN_ONCE(!rate->stbc && !rate->bfer && num_of_ant != 1, |
873 | "stbc %d bfer %d", | |
874 | rate->stbc, rate->bfer); | |
d310e405 | 875 | } else if (nss == 2) { |
5aa33553 | 876 | rate->type = LQ_HT_MIMO2; |
d310e405 | 877 | WARN_ON_ONCE(num_of_ant != 2); |
8ca151b5 | 878 | } else { |
d310e405 ES |
879 | WARN_ON_ONCE(1); |
880 | } | |
5aa33553 ES |
881 | } else if (ucode_rate & RATE_MCS_VHT_MSK) { |
882 | nss = ((ucode_rate & RATE_VHT_MCS_NSS_MSK) >> | |
d310e405 ES |
883 | RATE_VHT_MCS_NSS_POS) + 1; |
884 | ||
885 | if (nss == 1) { | |
5aa33553 | 886 | rate->type = LQ_VHT_SISO; |
ba69d0e3 ES |
887 | WARN_ONCE(!rate->stbc && !rate->bfer && num_of_ant != 1, |
888 | "stbc %d bfer %d", | |
889 | rate->stbc, rate->bfer); | |
d310e405 | 890 | } else if (nss == 2) { |
5aa33553 | 891 | rate->type = LQ_VHT_MIMO2; |
d310e405 ES |
892 | WARN_ON_ONCE(num_of_ant != 2); |
893 | } else { | |
894 | WARN_ON_ONCE(1); | |
8ca151b5 JB |
895 | } |
896 | } | |
d310e405 | 897 | |
5aa33553 ES |
898 | WARN_ON_ONCE(rate->bw == RATE_MCS_CHAN_WIDTH_160); |
899 | WARN_ON_ONCE(rate->bw == RATE_MCS_CHAN_WIDTH_80 && | |
900 | !is_vht(rate)); | |
d310e405 | 901 | |
8ca151b5 JB |
902 | return 0; |
903 | } | |
904 | ||
905 | /* switch to another antenna/antennas and return 1 */ | |
906 | /* if no other valid antenna found, return 0 */ | |
8fc7c58c | 907 | static int rs_toggle_antenna(u32 valid_ant, struct rs_rate *rate) |
8ca151b5 JB |
908 | { |
909 | u8 new_ant_type; | |
910 | ||
5aa33553 | 911 | if (!rate->ant || rate->ant > ANT_ABC) |
8ca151b5 JB |
912 | return 0; |
913 | ||
5aa33553 | 914 | if (!rs_is_valid_ant(valid_ant, rate->ant)) |
8ca151b5 JB |
915 | return 0; |
916 | ||
5aa33553 | 917 | new_ant_type = ant_toggle_lookup[rate->ant]; |
8ca151b5 | 918 | |
5aa33553 | 919 | while ((new_ant_type != rate->ant) && |
8ca151b5 JB |
920 | !rs_is_valid_ant(valid_ant, new_ant_type)) |
921 | new_ant_type = ant_toggle_lookup[new_ant_type]; | |
922 | ||
5aa33553 | 923 | if (new_ant_type == rate->ant) |
8ca151b5 JB |
924 | return 0; |
925 | ||
5aa33553 ES |
926 | rate->ant = new_ant_type; |
927 | ||
8ca151b5 JB |
928 | return 1; |
929 | } | |
930 | ||
8ca151b5 | 931 | static u16 rs_get_supported_rates(struct iwl_lq_sta *lq_sta, |
5aa33553 | 932 | struct rs_rate *rate) |
8ca151b5 | 933 | { |
5aa33553 | 934 | if (is_legacy(rate)) |
8ca151b5 | 935 | return lq_sta->active_legacy_rate; |
5aa33553 | 936 | else if (is_siso(rate)) |
d310e405 | 937 | return lq_sta->active_siso_rate; |
5aa33553 | 938 | else if (is_mimo2(rate)) |
d310e405 ES |
939 | return lq_sta->active_mimo2_rate; |
940 | ||
941 | WARN_ON_ONCE(1); | |
942 | return 0; | |
8ca151b5 JB |
943 | } |
944 | ||
945 | static u16 rs_get_adjacent_rate(struct iwl_mvm *mvm, u8 index, u16 rate_mask, | |
946 | int rate_type) | |
947 | { | |
948 | u8 high = IWL_RATE_INVALID; | |
949 | u8 low = IWL_RATE_INVALID; | |
950 | ||
951 | /* 802.11A or ht walks to the next literal adjacent rate in | |
952 | * the rate table */ | |
5aa33553 | 953 | if (is_type_a_band(rate_type) || !is_type_legacy(rate_type)) { |
8ca151b5 JB |
954 | int i; |
955 | u32 mask; | |
956 | ||
957 | /* Find the previous rate that is in the rate mask */ | |
958 | i = index - 1; | |
959 | for (mask = (1 << i); i >= 0; i--, mask >>= 1) { | |
960 | if (rate_mask & mask) { | |
961 | low = i; | |
962 | break; | |
963 | } | |
964 | } | |
965 | ||
966 | /* Find the next rate that is in the rate mask */ | |
967 | i = index + 1; | |
968 | for (mask = (1 << i); i < IWL_RATE_COUNT; i++, mask <<= 1) { | |
969 | if (rate_mask & mask) { | |
970 | high = i; | |
971 | break; | |
972 | } | |
973 | } | |
974 | ||
975 | return (high << 8) | low; | |
976 | } | |
977 | ||
978 | low = index; | |
979 | while (low != IWL_RATE_INVALID) { | |
980 | low = iwl_rates[low].prev_rs; | |
981 | if (low == IWL_RATE_INVALID) | |
982 | break; | |
983 | if (rate_mask & (1 << low)) | |
984 | break; | |
8ca151b5 JB |
985 | } |
986 | ||
987 | high = index; | |
988 | while (high != IWL_RATE_INVALID) { | |
989 | high = iwl_rates[high].next_rs; | |
990 | if (high == IWL_RATE_INVALID) | |
991 | break; | |
992 | if (rate_mask & (1 << high)) | |
993 | break; | |
8ca151b5 JB |
994 | } |
995 | ||
996 | return (high << 8) | low; | |
997 | } | |
998 | ||
e07be6d3 ES |
999 | static inline bool rs_rate_supported(struct iwl_lq_sta *lq_sta, |
1000 | struct rs_rate *rate) | |
8ca151b5 | 1001 | { |
e07be6d3 ES |
1002 | return BIT(rate->index) & rs_get_supported_rates(lq_sta, rate); |
1003 | } | |
1004 | ||
1005 | /* Get the next supported lower rate in the current column. | |
1006 | * Return true if bottom rate in the current column was reached | |
1007 | */ | |
1008 | static bool rs_get_lower_rate_in_column(struct iwl_lq_sta *lq_sta, | |
1009 | struct rs_rate *rate) | |
1010 | { | |
1011 | u8 low; | |
8ca151b5 | 1012 | u16 high_low; |
e07be6d3 | 1013 | u16 rate_mask; |
ae969afe | 1014 | struct iwl_mvm *mvm = lq_sta->pers.drv; |
e07be6d3 ES |
1015 | |
1016 | rate_mask = rs_get_supported_rates(lq_sta, rate); | |
1017 | high_low = rs_get_adjacent_rate(mvm, rate->index, rate_mask, | |
1018 | rate->type); | |
1019 | low = high_low & 0xff; | |
1020 | ||
1021 | /* Bottom rate of column reached */ | |
1022 | if (low == IWL_RATE_INVALID) | |
1023 | return true; | |
1024 | ||
1025 | rate->index = low; | |
1026 | return false; | |
1027 | } | |
1028 | ||
1029 | /* Get the next rate to use following a column downgrade */ | |
1030 | static void rs_get_lower_rate_down_column(struct iwl_lq_sta *lq_sta, | |
1031 | struct rs_rate *rate) | |
1032 | { | |
ae969afe | 1033 | struct iwl_mvm *mvm = lq_sta->pers.drv; |
8ca151b5 | 1034 | |
e07be6d3 ES |
1035 | if (is_legacy(rate)) { |
1036 | /* No column to downgrade from Legacy */ | |
1037 | return; | |
1038 | } else if (is_siso(rate)) { | |
1039 | /* Downgrade to Legacy if we were in SISO */ | |
8ca151b5 | 1040 | if (lq_sta->band == IEEE80211_BAND_5GHZ) |
5aa33553 | 1041 | rate->type = LQ_LEGACY_A; |
8ca151b5 | 1042 | else |
5aa33553 | 1043 | rate->type = LQ_LEGACY_G; |
8ca151b5 | 1044 | |
a56db7d1 | 1045 | rate->bw = RATE_MCS_CHAN_WIDTH_20; |
8ca151b5 | 1046 | |
b800040d | 1047 | WARN_ON_ONCE(rate->index < IWL_RATE_MCS_0_INDEX || |
e07be6d3 | 1048 | rate->index > IWL_RATE_MCS_9_INDEX); |
8ca151b5 | 1049 | |
e07be6d3 | 1050 | rate->index = rs_ht_to_legacy[rate->index]; |
a3576ff2 | 1051 | rate->ldpc = false; |
e07be6d3 ES |
1052 | } else { |
1053 | /* Downgrade to SISO with same MCS if in MIMO */ | |
1054 | rate->type = is_vht_mimo2(rate) ? | |
1055 | LQ_VHT_SISO : LQ_HT_SISO; | |
8ca151b5 JB |
1056 | } |
1057 | ||
e07be6d3 | 1058 | if (num_of_ant(rate->ant) > 1) |
a0544272 | 1059 | rate->ant = first_antenna(iwl_mvm_get_valid_tx_ant(mvm)); |
8ca151b5 | 1060 | |
e07be6d3 ES |
1061 | /* Relevant in both switching to SISO or Legacy */ |
1062 | rate->sgi = false; | |
1063 | ||
1064 | if (!rs_rate_supported(lq_sta, rate)) | |
1065 | rs_get_lower_rate_in_column(lq_sta, rate); | |
8ca151b5 JB |
1066 | } |
1067 | ||
ba69d0e3 ES |
1068 | /* Check if both rates are identical |
1069 | * allow_ant_mismatch enables matching a SISO rate on ANT_A or ANT_B | |
1070 | * with a rate indicating STBC/BFER and ANT_AB. | |
1071 | */ | |
929e6ede | 1072 | static inline bool rs_rate_equal(struct rs_rate *a, |
ba69d0e3 ES |
1073 | struct rs_rate *b, |
1074 | bool allow_ant_mismatch) | |
1075 | ||
929e6ede | 1076 | { |
ba69d0e3 ES |
1077 | bool ant_match = (a->ant == b->ant) && (a->stbc == b->stbc) && |
1078 | (a->bfer == b->bfer); | |
1079 | ||
1080 | if (allow_ant_mismatch) { | |
1081 | if (a->stbc || a->bfer) { | |
1082 | WARN_ONCE(a->ant != ANT_AB, "stbc %d bfer %d ant %d", | |
1083 | a->stbc, a->bfer, a->ant); | |
1084 | ant_match |= (b->ant == ANT_A || b->ant == ANT_B); | |
1085 | } else if (b->stbc || b->bfer) { | |
1086 | WARN_ONCE(b->ant != ANT_AB, "stbc %d bfer %d ant %d", | |
1087 | b->stbc, b->bfer, b->ant); | |
1088 | ant_match |= (a->ant == ANT_A || a->ant == ANT_B); | |
1089 | } | |
1090 | } | |
1091 | ||
929e6ede | 1092 | return (a->type == b->type) && (a->bw == b->bw) && (a->sgi == b->sgi) && |
ba69d0e3 | 1093 | (a->ldpc == b->ldpc) && (a->index == b->index) && ant_match; |
929e6ede ES |
1094 | } |
1095 | ||
1096 | /* Check if both rates share the same column */ | |
1097 | static inline bool rs_rate_column_match(struct rs_rate *a, | |
1098 | struct rs_rate *b) | |
8ca151b5 | 1099 | { |
d8bafeaf ES |
1100 | bool ant_match; |
1101 | ||
ba69d0e3 | 1102 | if (a->stbc || a->bfer) |
d8bafeaf ES |
1103 | ant_match = (b->ant == ANT_A || b->ant == ANT_B); |
1104 | else | |
1105 | ant_match = (a->ant == b->ant); | |
1106 | ||
1107 | return (a->type == b->type) && (a->bw == b->bw) && (a->sgi == b->sgi) | |
1108 | && ant_match; | |
8ca151b5 JB |
1109 | } |
1110 | ||
ad82d8a5 ES |
1111 | static inline enum rs_column rs_get_column_from_rate(struct rs_rate *rate) |
1112 | { | |
1113 | if (is_legacy(rate)) { | |
1114 | if (rate->ant == ANT_A) | |
1115 | return RS_COLUMN_LEGACY_ANT_A; | |
1116 | ||
1117 | if (rate->ant == ANT_B) | |
1118 | return RS_COLUMN_LEGACY_ANT_B; | |
1119 | ||
1120 | goto err; | |
1121 | } | |
1122 | ||
1123 | if (is_siso(rate)) { | |
1124 | if (rate->ant == ANT_A || rate->stbc || rate->bfer) | |
1125 | return rate->sgi ? RS_COLUMN_SISO_ANT_A_SGI : | |
1126 | RS_COLUMN_SISO_ANT_A; | |
1127 | ||
1128 | if (rate->ant == ANT_B) | |
1129 | return rate->sgi ? RS_COLUMN_SISO_ANT_B_SGI : | |
1130 | RS_COLUMN_SISO_ANT_B; | |
1131 | ||
1132 | goto err; | |
1133 | } | |
1134 | ||
1135 | if (is_mimo(rate)) | |
1136 | return rate->sgi ? RS_COLUMN_MIMO2_SGI : RS_COLUMN_MIMO2; | |
1137 | ||
1138 | err: | |
1139 | return RS_COLUMN_INVALID; | |
1140 | } | |
1141 | ||
1ebc8f2e ES |
1142 | static u8 rs_get_tid(struct ieee80211_hdr *hdr) |
1143 | { | |
1144 | u8 tid = IWL_MAX_TID_COUNT; | |
1145 | ||
1146 | if (ieee80211_is_data_qos(hdr->frame_control)) { | |
1147 | u8 *qc = ieee80211_get_qos_ctl(hdr); | |
1148 | tid = qc[0] & 0xf; | |
1149 | } | |
1150 | ||
1151 | if (unlikely(tid > IWL_MAX_TID_COUNT)) | |
1152 | tid = IWL_MAX_TID_COUNT; | |
1153 | ||
1154 | return tid; | |
1155 | } | |
1156 | ||
1157 | void iwl_mvm_rs_tx_status(struct iwl_mvm *mvm, struct ieee80211_sta *sta, | |
1158 | int tid, struct ieee80211_tx_info *info) | |
8ca151b5 JB |
1159 | { |
1160 | int legacy_success; | |
1161 | int retries; | |
929e6ede | 1162 | int i; |
8ca151b5 | 1163 | struct iwl_lq_cmd *table; |
929e6ede ES |
1164 | u32 lq_hwrate; |
1165 | struct rs_rate lq_rate, tx_resp_rate; | |
8ca151b5 | 1166 | struct iwl_scale_tbl_info *curr_tbl, *other_tbl, *tmp_tbl; |
2fd647f8 | 1167 | u8 reduced_txp = (uintptr_t)info->status.status_driver_data[0]; |
929e6ede | 1168 | u32 tx_resp_hwrate = (uintptr_t)info->status.status_driver_data[1]; |
1ebc8f2e ES |
1169 | struct iwl_mvm_sta *mvmsta = iwl_mvm_sta_from_mac80211(sta); |
1170 | struct iwl_lq_sta *lq_sta = &mvmsta->lq_sta; | |
859d914c JB |
1171 | bool allow_ant_mismatch = fw_has_api(&mvm->fw->ucode_capa, |
1172 | IWL_UCODE_TLV_API_LQ_SS_PARAMS); | |
8ca151b5 | 1173 | |
8ca151b5 JB |
1174 | /* Treat uninitialized rate scaling data same as non-existing. */ |
1175 | if (!lq_sta) { | |
1176 | IWL_DEBUG_RATE(mvm, "Station rate scaling not created yet.\n"); | |
1177 | return; | |
ae969afe | 1178 | } else if (!lq_sta->pers.drv) { |
8ca151b5 JB |
1179 | IWL_DEBUG_RATE(mvm, "Rate scaling not initialized yet.\n"); |
1180 | return; | |
1181 | } | |
1182 | ||
ad82d8a5 ES |
1183 | /* This packet was aggregated but doesn't carry status info */ |
1184 | if ((info->flags & IEEE80211_TX_CTL_AMPDU) && | |
1185 | !(info->flags & IEEE80211_TX_STAT_AMPDU)) | |
1186 | return; | |
1187 | ||
1188 | rs_rate_from_ucode_rate(tx_resp_hwrate, info->band, &tx_resp_rate); | |
1189 | ||
8e96440e | 1190 | #ifdef CONFIG_MAC80211_DEBUGFS |
ad82d8a5 ES |
1191 | /* Disable last tx check if we are debugging with fixed rate but |
1192 | * update tx stats */ | |
ae969afe | 1193 | if (lq_sta->pers.dbg_fixed_rate) { |
ad82d8a5 ES |
1194 | int index = tx_resp_rate.index; |
1195 | enum rs_column column; | |
1196 | int attempts, success; | |
1197 | ||
1198 | column = rs_get_column_from_rate(&tx_resp_rate); | |
1199 | if (WARN_ONCE(column == RS_COLUMN_INVALID, | |
1200 | "Can't map rate 0x%x to column", | |
1201 | tx_resp_hwrate)) | |
1202 | return; | |
1203 | ||
1204 | if (info->flags & IEEE80211_TX_STAT_AMPDU) { | |
1205 | attempts = info->status.ampdu_len; | |
1206 | success = info->status.ampdu_ack_len; | |
1207 | } else { | |
1208 | attempts = info->status.rates[0].count; | |
1209 | success = !!(info->flags & IEEE80211_TX_STAT_ACK); | |
1210 | } | |
1211 | ||
1212 | lq_sta->pers.tx_stats[column][index].total += attempts; | |
1213 | lq_sta->pers.tx_stats[column][index].success += success; | |
1214 | ||
1215 | IWL_DEBUG_RATE(mvm, "Fixed rate 0x%x success %d attempts %d\n", | |
1216 | tx_resp_hwrate, success, attempts); | |
87d5e415 ES |
1217 | return; |
1218 | } | |
1219 | #endif | |
8ca151b5 | 1220 | |
87d5e415 | 1221 | if (time_after(jiffies, |
834437da ES |
1222 | (unsigned long)(lq_sta->last_tx + |
1223 | (IWL_MVM_RS_IDLE_TIMEOUT * HZ)))) { | |
efad21d2 JB |
1224 | int t; |
1225 | ||
87d5e415 | 1226 | IWL_DEBUG_RATE(mvm, "Tx idle for too long. reinit rs\n"); |
efad21d2 JB |
1227 | for (t = 0; t < IWL_MAX_TID_COUNT; t++) |
1228 | ieee80211_stop_tx_ba_session(sta, t); | |
87d5e415 | 1229 | |
1ebc8f2e | 1230 | iwl_mvm_rs_rate_init(mvm, sta, info->band, false); |
87d5e415 ES |
1231 | return; |
1232 | } | |
1233 | lq_sta->last_tx = jiffies; | |
1234 | ||
929e6ede ES |
1235 | /* Ignore this Tx frame response if its initial rate doesn't match |
1236 | * that of latest Link Quality command. There may be stragglers | |
1237 | * from a previous Link Quality command, but we're no longer interested | |
1238 | * in those; they're either from the "active" mode while we're trying | |
1239 | * to check "search" mode, or a prior "search" mode after we've moved | |
1240 | * to a new "search" mode (which might become the new "active" mode). | |
1241 | */ | |
1242 | table = &lq_sta->lq; | |
1243 | lq_hwrate = le32_to_cpu(table->rs_table[0]); | |
1244 | rs_rate_from_ucode_rate(lq_hwrate, info->band, &lq_rate); | |
929e6ede | 1245 | |
8ca151b5 | 1246 | /* Here we actually compare this rate to the latest LQ command */ |
ba69d0e3 | 1247 | if (!rs_rate_equal(&tx_resp_rate, &lq_rate, allow_ant_mismatch)) { |
8ca151b5 | 1248 | IWL_DEBUG_RATE(mvm, |
929e6ede ES |
1249 | "initial tx resp rate 0x%x does not match 0x%x\n", |
1250 | tx_resp_hwrate, lq_hwrate); | |
1251 | ||
8ca151b5 JB |
1252 | /* |
1253 | * Since rates mis-match, the last LQ command may have failed. | |
1254 | * After IWL_MISSED_RATE_MAX mis-matches, resync the uCode with | |
1255 | * ... driver. | |
1256 | */ | |
1257 | lq_sta->missed_rate_counter++; | |
834437da | 1258 | if (lq_sta->missed_rate_counter > IWL_MVM_RS_MISSED_RATE_MAX) { |
8ca151b5 | 1259 | lq_sta->missed_rate_counter = 0; |
b3b06a32 ES |
1260 | IWL_DEBUG_RATE(mvm, |
1261 | "Too many rates mismatch. Send sync LQ. rs_state %d\n", | |
1262 | lq_sta->rs_state); | |
9e680946 | 1263 | iwl_mvm_send_lq_cmd(mvm, &lq_sta->lq, false); |
8ca151b5 JB |
1264 | } |
1265 | /* Regardless, ignore this status info for outdated rate */ | |
1266 | return; | |
1267 | } else | |
1268 | /* Rate did match, so reset the missed_rate_counter */ | |
1269 | lq_sta->missed_rate_counter = 0; | |
1270 | ||
26a2cc01 | 1271 | if (!lq_sta->search_better_tbl) { |
8ca151b5 JB |
1272 | curr_tbl = &(lq_sta->lq_info[lq_sta->active_tbl]); |
1273 | other_tbl = &(lq_sta->lq_info[1 - lq_sta->active_tbl]); | |
26a2cc01 | 1274 | } else { |
8ca151b5 JB |
1275 | curr_tbl = &(lq_sta->lq_info[1 - lq_sta->active_tbl]); |
1276 | other_tbl = &(lq_sta->lq_info[lq_sta->active_tbl]); | |
26a2cc01 ES |
1277 | } |
1278 | ||
929e6ede | 1279 | if (WARN_ON_ONCE(!rs_rate_column_match(&lq_rate, &curr_tbl->rate))) { |
8ca151b5 JB |
1280 | IWL_DEBUG_RATE(mvm, |
1281 | "Neither active nor search matches tx rate\n"); | |
1282 | tmp_tbl = &(lq_sta->lq_info[lq_sta->active_tbl]); | |
5aa33553 | 1283 | rs_dump_rate(mvm, &tmp_tbl->rate, "ACTIVE"); |
8ca151b5 | 1284 | tmp_tbl = &(lq_sta->lq_info[1 - lq_sta->active_tbl]); |
5aa33553 | 1285 | rs_dump_rate(mvm, &tmp_tbl->rate, "SEARCH"); |
929e6ede | 1286 | rs_dump_rate(mvm, &lq_rate, "ACTUAL"); |
5aa33553 | 1287 | |
8ca151b5 JB |
1288 | /* |
1289 | * no matching table found, let's by-pass the data collection | |
1290 | * and continue to perform rate scale to find the rate table | |
1291 | */ | |
1292 | rs_stay_in_table(lq_sta, true); | |
1293 | goto done; | |
1294 | } | |
1295 | ||
1296 | /* | |
1297 | * Updating the frame history depends on whether packets were | |
1298 | * aggregated. | |
1299 | * | |
1300 | * For aggregation, all packets were transmitted at the same rate, the | |
1301 | * first index into rate scale table. | |
1302 | */ | |
1303 | if (info->flags & IEEE80211_TX_STAT_AMPDU) { | |
d6bda667 ES |
1304 | /* ampdu_ack_len = 0 marks no BA was received. In this case |
1305 | * treat it as a single frame loss as we don't want the success | |
1306 | * ratio to dip too quickly because a BA wasn't received | |
1307 | */ | |
1308 | if (info->status.ampdu_ack_len == 0) | |
1309 | info->status.ampdu_len = 1; | |
1310 | ||
929e6ede | 1311 | rs_collect_tx_data(mvm, lq_sta, curr_tbl, lq_rate.index, |
8ca151b5 | 1312 | info->status.ampdu_len, |
2fd647f8 EP |
1313 | info->status.ampdu_ack_len, |
1314 | reduced_txp); | |
8ca151b5 JB |
1315 | |
1316 | /* Update success/fail counts if not searching for new mode */ | |
b3b06a32 | 1317 | if (lq_sta->rs_state == RS_STATE_STAY_IN_COLUMN) { |
8ca151b5 JB |
1318 | lq_sta->total_success += info->status.ampdu_ack_len; |
1319 | lq_sta->total_failed += (info->status.ampdu_len - | |
1320 | info->status.ampdu_ack_len); | |
1321 | } | |
1322 | } else { | |
90cb1237 | 1323 | /* For legacy, update frame history with for each Tx retry. */ |
8ca151b5 JB |
1324 | retries = info->status.rates[0].count - 1; |
1325 | /* HW doesn't send more than 15 retries */ | |
1326 | retries = min(retries, 15); | |
1327 | ||
1328 | /* The last transmission may have been successful */ | |
1329 | legacy_success = !!(info->flags & IEEE80211_TX_STAT_ACK); | |
1330 | /* Collect data for each rate used during failed TX attempts */ | |
1331 | for (i = 0; i <= retries; ++i) { | |
929e6ede ES |
1332 | lq_hwrate = le32_to_cpu(table->rs_table[i]); |
1333 | rs_rate_from_ucode_rate(lq_hwrate, info->band, | |
1334 | &lq_rate); | |
8ca151b5 JB |
1335 | /* |
1336 | * Only collect stats if retried rate is in the same RS | |
1337 | * table as active/search. | |
1338 | */ | |
929e6ede | 1339 | if (rs_rate_column_match(&lq_rate, &curr_tbl->rate)) |
8ca151b5 | 1340 | tmp_tbl = curr_tbl; |
929e6ede ES |
1341 | else if (rs_rate_column_match(&lq_rate, |
1342 | &other_tbl->rate)) | |
8ca151b5 | 1343 | tmp_tbl = other_tbl; |
4107dbd2 | 1344 | else |
8ca151b5 | 1345 | continue; |
4107dbd2 | 1346 | |
929e6ede ES |
1347 | rs_collect_tx_data(mvm, lq_sta, tmp_tbl, lq_rate.index, |
1348 | 1, i < retries ? 0 : legacy_success, | |
2fd647f8 | 1349 | reduced_txp); |
8ca151b5 JB |
1350 | } |
1351 | ||
1352 | /* Update success/fail counts if not searching for new mode */ | |
b3b06a32 | 1353 | if (lq_sta->rs_state == RS_STATE_STAY_IN_COLUMN) { |
8ca151b5 JB |
1354 | lq_sta->total_success += legacy_success; |
1355 | lq_sta->total_failed += retries + (1 - legacy_success); | |
1356 | } | |
1357 | } | |
1358 | /* The last TX rate is cached in lq_sta; it's set in if/else above */ | |
929e6ede | 1359 | lq_sta->last_rate_n_flags = lq_hwrate; |
2fd647f8 | 1360 | IWL_DEBUG_RATE(mvm, "reduced txpower: %d\n", reduced_txp); |
8ca151b5 JB |
1361 | done: |
1362 | /* See if there's a better rate or modulation mode to try. */ | |
8dfc2751 | 1363 | if (sta->supp_rates[info->band]) |
1ebc8f2e ES |
1364 | rs_rate_scale_perform(mvm, sta, lq_sta, tid); |
1365 | } | |
1366 | ||
1367 | /* | |
1368 | * mac80211 sends us Tx status | |
1369 | */ | |
1370 | static void rs_mac80211_tx_status(void *mvm_r, | |
1371 | struct ieee80211_supported_band *sband, | |
1372 | struct ieee80211_sta *sta, void *priv_sta, | |
1373 | struct sk_buff *skb) | |
1374 | { | |
1375 | struct ieee80211_hdr *hdr = (struct ieee80211_hdr *)skb->data; | |
1376 | struct iwl_op_mode *op_mode = (struct iwl_op_mode *)mvm_r; | |
1377 | struct iwl_mvm *mvm = IWL_OP_MODE_GET_MVM(op_mode); | |
1378 | struct ieee80211_tx_info *info = IEEE80211_SKB_CB(skb); | |
1379 | ||
dcbc17ad JB |
1380 | if (!iwl_mvm_sta_from_mac80211(sta)->vif) |
1381 | return; | |
1382 | ||
1ebc8f2e ES |
1383 | if (!ieee80211_is_data(hdr->frame_control) || |
1384 | info->flags & IEEE80211_TX_CTL_NO_ACK) | |
1385 | return; | |
1386 | ||
1387 | iwl_mvm_rs_tx_status(mvm, sta, rs_get_tid(hdr), info); | |
8ca151b5 JB |
1388 | } |
1389 | ||
1390 | /* | |
1391 | * Begin a period of staying with a selected modulation mode. | |
1392 | * Set "stay_in_tbl" flag to prevent any mode switches. | |
1393 | * Set frame tx success limits according to legacy vs. high-throughput, | |
1394 | * and reset overall (spanning all rates) tx success history statistics. | |
1395 | * These control how long we stay using same modulation mode before | |
1396 | * searching for a new mode. | |
1397 | */ | |
1398 | static void rs_set_stay_in_table(struct iwl_mvm *mvm, u8 is_legacy, | |
1399 | struct iwl_lq_sta *lq_sta) | |
1400 | { | |
b3b06a32 ES |
1401 | IWL_DEBUG_RATE(mvm, "Moving to RS_STATE_STAY_IN_COLUMN\n"); |
1402 | lq_sta->rs_state = RS_STATE_STAY_IN_COLUMN; | |
8ca151b5 | 1403 | if (is_legacy) { |
834437da ES |
1404 | lq_sta->table_count_limit = IWL_MVM_RS_LEGACY_TABLE_COUNT; |
1405 | lq_sta->max_failure_limit = IWL_MVM_RS_LEGACY_FAILURE_LIMIT; | |
1406 | lq_sta->max_success_limit = IWL_MVM_RS_LEGACY_SUCCESS_LIMIT; | |
8ca151b5 | 1407 | } else { |
834437da ES |
1408 | lq_sta->table_count_limit = IWL_MVM_RS_NON_LEGACY_TABLE_COUNT; |
1409 | lq_sta->max_failure_limit = IWL_MVM_RS_NON_LEGACY_FAILURE_LIMIT; | |
1410 | lq_sta->max_success_limit = IWL_MVM_RS_NON_LEGACY_SUCCESS_LIMIT; | |
8ca151b5 JB |
1411 | } |
1412 | lq_sta->table_count = 0; | |
1413 | lq_sta->total_failed = 0; | |
1414 | lq_sta->total_success = 0; | |
1415 | lq_sta->flush_timer = jiffies; | |
b3b06a32 | 1416 | lq_sta->visited_columns = 0; |
8ca151b5 JB |
1417 | } |
1418 | ||
6a028d9a ES |
1419 | static inline int rs_get_max_rate_from_mask(unsigned long rate_mask) |
1420 | { | |
1421 | if (rate_mask) | |
1422 | return find_last_bit(&rate_mask, BITS_PER_LONG); | |
1423 | return IWL_RATE_INVALID; | |
1424 | } | |
1425 | ||
198266a3 ES |
1426 | static int rs_get_max_allowed_rate(struct iwl_lq_sta *lq_sta, |
1427 | const struct rs_tx_column *column) | |
1428 | { | |
1429 | switch (column->mode) { | |
1430 | case RS_LEGACY: | |
1431 | return lq_sta->max_legacy_rate_idx; | |
1432 | case RS_SISO: | |
1433 | return lq_sta->max_siso_rate_idx; | |
1434 | case RS_MIMO2: | |
1435 | return lq_sta->max_mimo2_rate_idx; | |
1436 | default: | |
1437 | WARN_ON_ONCE(1); | |
1438 | } | |
1439 | ||
1440 | return lq_sta->max_legacy_rate_idx; | |
1441 | } | |
1442 | ||
a34529e8 | 1443 | static const u16 *rs_get_expected_tpt_table(struct iwl_lq_sta *lq_sta, |
198266a3 ES |
1444 | const struct rs_tx_column *column, |
1445 | u32 bw) | |
8ca151b5 JB |
1446 | { |
1447 | /* Used to choose among HT tables */ | |
a34529e8 | 1448 | const u16 (*ht_tbl_pointer)[IWL_RATE_COUNT]; |
8ca151b5 | 1449 | |
b3b06a32 ES |
1450 | if (WARN_ON_ONCE(column->mode != RS_LEGACY && |
1451 | column->mode != RS_SISO && | |
1452 | column->mode != RS_MIMO2)) | |
1453 | return expected_tpt_legacy; | |
8ca151b5 JB |
1454 | |
1455 | /* Legacy rates have only one table */ | |
b3b06a32 ES |
1456 | if (column->mode == RS_LEGACY) |
1457 | return expected_tpt_legacy; | |
8ca151b5 | 1458 | |
d310e405 | 1459 | ht_tbl_pointer = expected_tpt_mimo2_20MHz; |
8ca151b5 | 1460 | /* Choose among many HT tables depending on number of streams |
d310e405 | 1461 | * (SISO/MIMO2), channel width (20/40/80), SGI, and aggregation |
8ca151b5 | 1462 | * status */ |
b3b06a32 ES |
1463 | if (column->mode == RS_SISO) { |
1464 | switch (bw) { | |
d310e405 ES |
1465 | case RATE_MCS_CHAN_WIDTH_20: |
1466 | ht_tbl_pointer = expected_tpt_siso_20MHz; | |
1467 | break; | |
1468 | case RATE_MCS_CHAN_WIDTH_40: | |
1469 | ht_tbl_pointer = expected_tpt_siso_40MHz; | |
1470 | break; | |
1471 | case RATE_MCS_CHAN_WIDTH_80: | |
1472 | ht_tbl_pointer = expected_tpt_siso_80MHz; | |
1473 | break; | |
1474 | default: | |
1475 | WARN_ON_ONCE(1); | |
1476 | } | |
b3b06a32 ES |
1477 | } else if (column->mode == RS_MIMO2) { |
1478 | switch (bw) { | |
d310e405 ES |
1479 | case RATE_MCS_CHAN_WIDTH_20: |
1480 | ht_tbl_pointer = expected_tpt_mimo2_20MHz; | |
1481 | break; | |
1482 | case RATE_MCS_CHAN_WIDTH_40: | |
1483 | ht_tbl_pointer = expected_tpt_mimo2_40MHz; | |
1484 | break; | |
1485 | case RATE_MCS_CHAN_WIDTH_80: | |
1486 | ht_tbl_pointer = expected_tpt_mimo2_80MHz; | |
1487 | break; | |
1488 | default: | |
1489 | WARN_ON_ONCE(1); | |
1490 | } | |
1491 | } else { | |
1492 | WARN_ON_ONCE(1); | |
d972ab31 | 1493 | } |
8ca151b5 | 1494 | |
b3b06a32 ES |
1495 | if (!column->sgi && !lq_sta->is_agg) /* Normal */ |
1496 | return ht_tbl_pointer[0]; | |
1497 | else if (column->sgi && !lq_sta->is_agg) /* SGI */ | |
1498 | return ht_tbl_pointer[1]; | |
1499 | else if (!column->sgi && lq_sta->is_agg) /* AGG */ | |
1500 | return ht_tbl_pointer[2]; | |
8ca151b5 | 1501 | else /* AGG+SGI */ |
b3b06a32 ES |
1502 | return ht_tbl_pointer[3]; |
1503 | } | |
1504 | ||
1505 | static void rs_set_expected_tpt_table(struct iwl_lq_sta *lq_sta, | |
1506 | struct iwl_scale_tbl_info *tbl) | |
1507 | { | |
1508 | struct rs_rate *rate = &tbl->rate; | |
1509 | const struct rs_tx_column *column = &rs_tx_columns[tbl->column]; | |
1510 | ||
1511 | tbl->expected_tpt = rs_get_expected_tpt_table(lq_sta, column, rate->bw); | |
8ca151b5 JB |
1512 | } |
1513 | ||
8ca151b5 JB |
1514 | static s32 rs_get_best_rate(struct iwl_mvm *mvm, |
1515 | struct iwl_lq_sta *lq_sta, | |
1516 | struct iwl_scale_tbl_info *tbl, /* "search" */ | |
80763515 | 1517 | unsigned long rate_mask, s8 index) |
8ca151b5 | 1518 | { |
8ca151b5 JB |
1519 | struct iwl_scale_tbl_info *active_tbl = |
1520 | &(lq_sta->lq_info[lq_sta->active_tbl]); | |
80763515 ES |
1521 | s32 success_ratio = active_tbl->win[index].success_ratio; |
1522 | u16 expected_current_tpt = active_tbl->expected_tpt[index]; | |
a34529e8 | 1523 | const u16 *tpt_tbl = tbl->expected_tpt; |
8ca151b5 | 1524 | u16 high_low; |
80763515 ES |
1525 | u32 target_tpt; |
1526 | int rate_idx; | |
8ca151b5 | 1527 | |
ed21a384 | 1528 | if (success_ratio >= RS_PERCENT(IWL_MVM_RS_SR_NO_DECREASE)) { |
80763515 ES |
1529 | target_tpt = 100 * expected_current_tpt; |
1530 | IWL_DEBUG_RATE(mvm, | |
1531 | "SR %d high. Find rate exceeding EXPECTED_CURRENT %d\n", | |
1532 | success_ratio, target_tpt); | |
1533 | } else { | |
1534 | target_tpt = lq_sta->last_tpt; | |
1535 | IWL_DEBUG_RATE(mvm, | |
ed21a384 | 1536 | "SR %d not that good. Find rate exceeding ACTUAL_TPT %d\n", |
80763515 ES |
1537 | success_ratio, target_tpt); |
1538 | } | |
8ca151b5 | 1539 | |
80763515 | 1540 | rate_idx = find_first_bit(&rate_mask, BITS_PER_LONG); |
8ca151b5 | 1541 | |
80763515 ES |
1542 | while (rate_idx != IWL_RATE_INVALID) { |
1543 | if (target_tpt < (100 * tpt_tbl[rate_idx])) | |
1544 | break; | |
8ca151b5 | 1545 | |
80763515 ES |
1546 | high_low = rs_get_adjacent_rate(mvm, rate_idx, rate_mask, |
1547 | tbl->rate.type); | |
8ca151b5 | 1548 | |
80763515 | 1549 | rate_idx = (high_low >> 8) & 0xff; |
8ca151b5 JB |
1550 | } |
1551 | ||
80763515 ES |
1552 | IWL_DEBUG_RATE(mvm, "Best rate found %d target_tp %d expected_new %d\n", |
1553 | rate_idx, target_tpt, | |
1554 | rate_idx != IWL_RATE_INVALID ? | |
1555 | 100 * tpt_tbl[rate_idx] : IWL_INVALID_VALUE); | |
1556 | ||
1557 | return rate_idx; | |
8ca151b5 JB |
1558 | } |
1559 | ||
5aa33553 | 1560 | static u32 rs_bw_from_sta_bw(struct ieee80211_sta *sta) |
d310e405 ES |
1561 | { |
1562 | if (sta->bandwidth >= IEEE80211_STA_RX_BW_80) | |
5aa33553 | 1563 | return RATE_MCS_CHAN_WIDTH_80; |
d310e405 | 1564 | else if (sta->bandwidth >= IEEE80211_STA_RX_BW_40) |
5aa33553 ES |
1565 | return RATE_MCS_CHAN_WIDTH_40; |
1566 | ||
1567 | return RATE_MCS_CHAN_WIDTH_20; | |
d310e405 ES |
1568 | } |
1569 | ||
8ca151b5 JB |
1570 | /* |
1571 | * Check whether we should continue using same modulation mode, or | |
1572 | * begin search for a new mode, based on: | |
1573 | * 1) # tx successes or failures while using this mode | |
1574 | * 2) # times calling this function | |
1575 | * 3) elapsed time in this mode (not used, for now) | |
1576 | */ | |
1577 | static void rs_stay_in_table(struct iwl_lq_sta *lq_sta, bool force_search) | |
1578 | { | |
1579 | struct iwl_scale_tbl_info *tbl; | |
8ca151b5 JB |
1580 | int active_tbl; |
1581 | int flush_interval_passed = 0; | |
1582 | struct iwl_mvm *mvm; | |
1583 | ||
ae969afe | 1584 | mvm = lq_sta->pers.drv; |
8ca151b5 JB |
1585 | active_tbl = lq_sta->active_tbl; |
1586 | ||
1587 | tbl = &(lq_sta->lq_info[active_tbl]); | |
1588 | ||
1589 | /* If we've been disallowing search, see if we should now allow it */ | |
b3b06a32 | 1590 | if (lq_sta->rs_state == RS_STATE_STAY_IN_COLUMN) { |
8ca151b5 JB |
1591 | /* Elapsed time using current modulation mode */ |
1592 | if (lq_sta->flush_timer) | |
1593 | flush_interval_passed = | |
1594 | time_after(jiffies, | |
1595 | (unsigned long)(lq_sta->flush_timer + | |
834437da | 1596 | (IWL_MVM_RS_STAY_IN_COLUMN_TIMEOUT * HZ))); |
8ca151b5 JB |
1597 | |
1598 | /* | |
1599 | * Check if we should allow search for new modulation mode. | |
1600 | * If many frames have failed or succeeded, or we've used | |
1601 | * this same modulation for a long time, allow search, and | |
1602 | * reset history stats that keep track of whether we should | |
1603 | * allow a new search. Also (below) reset all bitmaps and | |
1604 | * stats in active history. | |
1605 | */ | |
1606 | if (force_search || | |
1607 | (lq_sta->total_failed > lq_sta->max_failure_limit) || | |
1608 | (lq_sta->total_success > lq_sta->max_success_limit) || | |
1609 | ((!lq_sta->search_better_tbl) && | |
1610 | (lq_sta->flush_timer) && (flush_interval_passed))) { | |
1611 | IWL_DEBUG_RATE(mvm, | |
1612 | "LQ: stay is expired %d %d %d\n", | |
1613 | lq_sta->total_failed, | |
1614 | lq_sta->total_success, | |
1615 | flush_interval_passed); | |
1616 | ||
1617 | /* Allow search for new mode */ | |
b3b06a32 ES |
1618 | lq_sta->rs_state = RS_STATE_SEARCH_CYCLE_STARTED; |
1619 | IWL_DEBUG_RATE(mvm, | |
1620 | "Moving to RS_STATE_SEARCH_CYCLE_STARTED\n"); | |
8ca151b5 JB |
1621 | lq_sta->total_failed = 0; |
1622 | lq_sta->total_success = 0; | |
1623 | lq_sta->flush_timer = 0; | |
b3b06a32 ES |
1624 | /* mark the current column as visited */ |
1625 | lq_sta->visited_columns = BIT(tbl->column); | |
8ca151b5 JB |
1626 | /* |
1627 | * Else if we've used this modulation mode enough repetitions | |
1628 | * (regardless of elapsed time or success/failure), reset | |
1629 | * history bitmaps and rate-specific stats for all rates in | |
1630 | * active table. | |
1631 | */ | |
1632 | } else { | |
1633 | lq_sta->table_count++; | |
1634 | if (lq_sta->table_count >= | |
1635 | lq_sta->table_count_limit) { | |
1636 | lq_sta->table_count = 0; | |
1637 | ||
1638 | IWL_DEBUG_RATE(mvm, | |
1639 | "LQ: stay in table clear win\n"); | |
b804eeb6 | 1640 | rs_rate_scale_clear_tbl_windows(mvm, tbl); |
8ca151b5 JB |
1641 | } |
1642 | } | |
1643 | ||
1644 | /* If transitioning to allow "search", reset all history | |
1645 | * bitmaps and stats in active table (this will become the new | |
1646 | * "search" table). */ | |
b3b06a32 | 1647 | if (lq_sta->rs_state == RS_STATE_SEARCH_CYCLE_STARTED) { |
b804eeb6 | 1648 | rs_rate_scale_clear_tbl_windows(mvm, tbl); |
8ca151b5 JB |
1649 | } |
1650 | } | |
1651 | } | |
1652 | ||
1653 | /* | |
1654 | * setup rate table in uCode | |
1655 | */ | |
1656 | static void rs_update_rate_tbl(struct iwl_mvm *mvm, | |
9145d151 | 1657 | struct ieee80211_sta *sta, |
8ca151b5 | 1658 | struct iwl_lq_sta *lq_sta, |
7b9d74e4 | 1659 | struct iwl_scale_tbl_info *tbl) |
8ca151b5 | 1660 | { |
7b9d74e4 | 1661 | rs_fill_lq_cmd(mvm, sta, lq_sta, &tbl->rate); |
9e680946 | 1662 | iwl_mvm_send_lq_cmd(mvm, &lq_sta->lq, false); |
8ca151b5 JB |
1663 | } |
1664 | ||
1191f646 ES |
1665 | static bool rs_tweak_rate_tbl(struct iwl_mvm *mvm, |
1666 | struct ieee80211_sta *sta, | |
1667 | struct iwl_lq_sta *lq_sta, | |
1668 | struct iwl_scale_tbl_info *tbl, | |
1669 | enum rs_action scale_action) | |
1670 | { | |
1671 | if (sta->bandwidth != IEEE80211_STA_RX_BW_80) | |
1672 | return false; | |
1673 | ||
1674 | if (!is_vht_siso(&tbl->rate)) | |
1675 | return false; | |
1676 | ||
1677 | if ((tbl->rate.bw == RATE_MCS_CHAN_WIDTH_80) && | |
1678 | (tbl->rate.index == IWL_RATE_MCS_0_INDEX) && | |
1679 | (scale_action == RS_ACTION_DOWNSCALE)) { | |
1680 | tbl->rate.bw = RATE_MCS_CHAN_WIDTH_20; | |
1681 | tbl->rate.index = IWL_RATE_MCS_4_INDEX; | |
1682 | IWL_DEBUG_RATE(mvm, "Switch 80Mhz SISO MCS0 -> 20Mhz MCS4\n"); | |
1683 | goto tweaked; | |
1684 | } | |
1685 | ||
1686 | /* Go back to 80Mhz MCS1 only if we've established that 20Mhz MCS5 is | |
1687 | * sustainable, i.e. we're past the test window. We can't go back | |
1688 | * if MCS5 is just tested as this will happen always after switching | |
1689 | * to 20Mhz MCS4 because the rate stats are cleared. | |
1690 | */ | |
1691 | if ((tbl->rate.bw == RATE_MCS_CHAN_WIDTH_20) && | |
1692 | (((tbl->rate.index == IWL_RATE_MCS_5_INDEX) && | |
1693 | (scale_action == RS_ACTION_STAY)) || | |
1694 | ((tbl->rate.index > IWL_RATE_MCS_5_INDEX) && | |
1695 | (scale_action == RS_ACTION_UPSCALE)))) { | |
1696 | tbl->rate.bw = RATE_MCS_CHAN_WIDTH_80; | |
1697 | tbl->rate.index = IWL_RATE_MCS_1_INDEX; | |
1698 | IWL_DEBUG_RATE(mvm, "Switch 20Mhz SISO MCS5 -> 80Mhz MCS1\n"); | |
1699 | goto tweaked; | |
1700 | } | |
1701 | ||
1702 | return false; | |
1703 | ||
1704 | tweaked: | |
1705 | rs_set_expected_tpt_table(lq_sta, tbl); | |
1706 | rs_rate_scale_clear_tbl_windows(mvm, tbl); | |
1707 | return true; | |
1708 | } | |
1709 | ||
b3b06a32 ES |
1710 | static enum rs_column rs_get_next_column(struct iwl_mvm *mvm, |
1711 | struct iwl_lq_sta *lq_sta, | |
1712 | struct ieee80211_sta *sta, | |
1713 | struct iwl_scale_tbl_info *tbl) | |
1714 | { | |
198266a3 | 1715 | int i, j, max_rate; |
b3b06a32 ES |
1716 | enum rs_column next_col_id; |
1717 | const struct rs_tx_column *curr_col = &rs_tx_columns[tbl->column]; | |
1718 | const struct rs_tx_column *next_col; | |
1719 | allow_column_func_t allow_func; | |
a0544272 | 1720 | u8 valid_ants = iwl_mvm_get_valid_tx_ant(mvm); |
a34529e8 | 1721 | const u16 *expected_tpt_tbl; |
198266a3 | 1722 | u16 tpt, max_expected_tpt; |
b3b06a32 ES |
1723 | |
1724 | for (i = 0; i < MAX_NEXT_COLUMNS; i++) { | |
1725 | next_col_id = curr_col->next_columns[i]; | |
1726 | ||
1727 | if (next_col_id == RS_COLUMN_INVALID) | |
1728 | continue; | |
1729 | ||
1730 | if (lq_sta->visited_columns & BIT(next_col_id)) { | |
1731 | IWL_DEBUG_RATE(mvm, "Skip already visited column %d\n", | |
1732 | next_col_id); | |
1733 | continue; | |
1734 | } | |
1735 | ||
1736 | next_col = &rs_tx_columns[next_col_id]; | |
1737 | ||
1738 | if (!rs_is_valid_ant(valid_ants, next_col->ant)) { | |
1739 | IWL_DEBUG_RATE(mvm, | |
1740 | "Skip column %d as ANT config isn't supported by chip. valid_ants 0x%x column ant 0x%x\n", | |
1741 | next_col_id, valid_ants, next_col->ant); | |
1742 | continue; | |
1743 | } | |
1744 | ||
1745 | for (j = 0; j < MAX_COLUMN_CHECKS; j++) { | |
1746 | allow_func = next_col->checks[j]; | |
bb8f44c9 ES |
1747 | if (allow_func && !allow_func(mvm, sta, &tbl->rate, |
1748 | next_col)) | |
b3b06a32 ES |
1749 | break; |
1750 | } | |
1751 | ||
1752 | if (j != MAX_COLUMN_CHECKS) { | |
1753 | IWL_DEBUG_RATE(mvm, | |
1754 | "Skip column %d: not allowed (check %d failed)\n", | |
1755 | next_col_id, j); | |
1756 | ||
1757 | continue; | |
1758 | } | |
1759 | ||
1760 | tpt = lq_sta->last_tpt / 100; | |
1761 | expected_tpt_tbl = rs_get_expected_tpt_table(lq_sta, next_col, | |
049e0c33 | 1762 | rs_bw_from_sta_bw(sta)); |
b3b06a32 ES |
1763 | if (WARN_ON_ONCE(!expected_tpt_tbl)) |
1764 | continue; | |
1765 | ||
198266a3 | 1766 | max_rate = rs_get_max_allowed_rate(lq_sta, next_col); |
6a028d9a ES |
1767 | if (max_rate == IWL_RATE_INVALID) { |
1768 | IWL_DEBUG_RATE(mvm, | |
1769 | "Skip column %d: no rate is allowed in this column\n", | |
1770 | next_col_id); | |
198266a3 | 1771 | continue; |
6a028d9a | 1772 | } |
b3b06a32 | 1773 | |
198266a3 | 1774 | max_expected_tpt = expected_tpt_tbl[max_rate]; |
b3b06a32 ES |
1775 | if (tpt >= max_expected_tpt) { |
1776 | IWL_DEBUG_RATE(mvm, | |
1777 | "Skip column %d: can't beat current TPT. Max expected %d current %d\n", | |
1778 | next_col_id, max_expected_tpt, tpt); | |
1779 | continue; | |
1780 | } | |
1781 | ||
198266a3 ES |
1782 | IWL_DEBUG_RATE(mvm, |
1783 | "Found potential column %d. Max expected %d current %d\n", | |
1784 | next_col_id, max_expected_tpt, tpt); | |
b3b06a32 ES |
1785 | break; |
1786 | } | |
1787 | ||
1788 | if (i == MAX_NEXT_COLUMNS) | |
1789 | return RS_COLUMN_INVALID; | |
1790 | ||
b3b06a32 ES |
1791 | return next_col_id; |
1792 | } | |
1793 | ||
1794 | static int rs_switch_to_column(struct iwl_mvm *mvm, | |
1795 | struct iwl_lq_sta *lq_sta, | |
1796 | struct ieee80211_sta *sta, | |
1797 | enum rs_column col_id) | |
1798 | { | |
1799 | struct iwl_scale_tbl_info *tbl = &(lq_sta->lq_info[lq_sta->active_tbl]); | |
1800 | struct iwl_scale_tbl_info *search_tbl = | |
1801 | &(lq_sta->lq_info[(1 - lq_sta->active_tbl)]); | |
1802 | struct rs_rate *rate = &search_tbl->rate; | |
1803 | const struct rs_tx_column *column = &rs_tx_columns[col_id]; | |
1804 | const struct rs_tx_column *curr_column = &rs_tx_columns[tbl->column]; | |
1805 | u32 sz = (sizeof(struct iwl_scale_tbl_info) - | |
1806 | (sizeof(struct iwl_rate_scale_data) * IWL_RATE_COUNT)); | |
80763515 | 1807 | unsigned long rate_mask = 0; |
b3b06a32 ES |
1808 | u32 rate_idx = 0; |
1809 | ||
1810 | memcpy(search_tbl, tbl, sz); | |
1811 | ||
1812 | rate->sgi = column->sgi; | |
1813 | rate->ant = column->ant; | |
1814 | ||
1815 | if (column->mode == RS_LEGACY) { | |
1816 | if (lq_sta->band == IEEE80211_BAND_5GHZ) | |
1817 | rate->type = LQ_LEGACY_A; | |
1818 | else | |
1819 | rate->type = LQ_LEGACY_G; | |
1820 | ||
d8bafeaf ES |
1821 | rate->bw = RATE_MCS_CHAN_WIDTH_20; |
1822 | rate->ldpc = false; | |
b3b06a32 ES |
1823 | rate_mask = lq_sta->active_legacy_rate; |
1824 | } else if (column->mode == RS_SISO) { | |
1825 | rate->type = lq_sta->is_vht ? LQ_VHT_SISO : LQ_HT_SISO; | |
1826 | rate_mask = lq_sta->active_siso_rate; | |
1827 | } else if (column->mode == RS_MIMO2) { | |
1828 | rate->type = lq_sta->is_vht ? LQ_VHT_MIMO2 : LQ_HT_MIMO2; | |
1829 | rate_mask = lq_sta->active_mimo2_rate; | |
1830 | } else { | |
7281b164 | 1831 | WARN_ONCE(1, "Bad column mode"); |
b3b06a32 ES |
1832 | } |
1833 | ||
d8bafeaf ES |
1834 | if (column->mode != RS_LEGACY) { |
1835 | rate->bw = rs_bw_from_sta_bw(sta); | |
1836 | rate->ldpc = lq_sta->ldpc; | |
1837 | } | |
1838 | ||
b3b06a32 ES |
1839 | search_tbl->column = col_id; |
1840 | rs_set_expected_tpt_table(lq_sta, search_tbl); | |
1841 | ||
75d3e2d6 ES |
1842 | lq_sta->visited_columns |= BIT(col_id); |
1843 | ||
b3b06a32 ES |
1844 | /* Get the best matching rate if we're changing modes. e.g. |
1845 | * SISO->MIMO, LEGACY->SISO, MIMO->SISO | |
1846 | */ | |
1847 | if (curr_column->mode != column->mode) { | |
1848 | rate_idx = rs_get_best_rate(mvm, lq_sta, search_tbl, | |
1849 | rate_mask, rate->index); | |
1850 | ||
1851 | if ((rate_idx == IWL_RATE_INVALID) || | |
1852 | !(BIT(rate_idx) & rate_mask)) { | |
1853 | IWL_DEBUG_RATE(mvm, | |
1854 | "can not switch with index %d" | |
80763515 | 1855 | " rate mask %lx\n", |
b3b06a32 ES |
1856 | rate_idx, rate_mask); |
1857 | ||
1858 | goto err; | |
1859 | } | |
1860 | ||
1861 | rate->index = rate_idx; | |
1862 | } | |
1863 | ||
b3b06a32 ES |
1864 | IWL_DEBUG_RATE(mvm, "Switched to column %d: Index %d\n", |
1865 | col_id, rate->index); | |
1866 | ||
b3b06a32 ES |
1867 | return 0; |
1868 | ||
1869 | err: | |
1870 | rate->type = LQ_NONE; | |
1871 | return -1; | |
1872 | } | |
1873 | ||
4e4b815c ES |
1874 | static enum rs_action rs_get_rate_action(struct iwl_mvm *mvm, |
1875 | struct iwl_scale_tbl_info *tbl, | |
1876 | s32 sr, int low, int high, | |
1877 | int current_tpt, | |
1878 | int low_tpt, int high_tpt) | |
1879 | { | |
1880 | enum rs_action action = RS_ACTION_STAY; | |
1881 | ||
834437da ES |
1882 | if ((sr <= RS_PERCENT(IWL_MVM_RS_SR_FORCE_DECREASE)) || |
1883 | (current_tpt == 0)) { | |
4e4b815c | 1884 | IWL_DEBUG_RATE(mvm, |
e53839eb ES |
1885 | "Decrease rate because of low SR\n"); |
1886 | return RS_ACTION_DOWNSCALE; | |
4e4b815c ES |
1887 | } |
1888 | ||
e53839eb ES |
1889 | if ((low_tpt == IWL_INVALID_VALUE) && |
1890 | (high_tpt == IWL_INVALID_VALUE) && | |
1891 | (high != IWL_RATE_INVALID)) { | |
4e4b815c | 1892 | IWL_DEBUG_RATE(mvm, |
e53839eb ES |
1893 | "No data about high/low rates. Increase rate\n"); |
1894 | return RS_ACTION_UPSCALE; | |
4e4b815c ES |
1895 | } |
1896 | ||
e53839eb ES |
1897 | if ((high_tpt == IWL_INVALID_VALUE) && |
1898 | (high != IWL_RATE_INVALID) && | |
1899 | (low_tpt != IWL_INVALID_VALUE) && | |
1900 | (low_tpt < current_tpt)) { | |
1901 | IWL_DEBUG_RATE(mvm, | |
1902 | "No data about high rate and low rate is worse. Increase rate\n"); | |
1903 | return RS_ACTION_UPSCALE; | |
1904 | } | |
4e4b815c | 1905 | |
e53839eb ES |
1906 | if ((high_tpt != IWL_INVALID_VALUE) && |
1907 | (high_tpt > current_tpt)) { | |
1908 | IWL_DEBUG_RATE(mvm, | |
1909 | "Higher rate is better. Increate rate\n"); | |
1910 | return RS_ACTION_UPSCALE; | |
4e4b815c ES |
1911 | } |
1912 | ||
e53839eb ES |
1913 | if ((low_tpt != IWL_INVALID_VALUE) && |
1914 | (high_tpt != IWL_INVALID_VALUE) && | |
1915 | (low_tpt < current_tpt) && | |
1916 | (high_tpt < current_tpt)) { | |
4e4b815c | 1917 | IWL_DEBUG_RATE(mvm, |
e53839eb ES |
1918 | "Both high and low are worse. Maintain rate\n"); |
1919 | return RS_ACTION_STAY; | |
1920 | } | |
1921 | ||
1922 | if ((low_tpt != IWL_INVALID_VALUE) && | |
1923 | (low_tpt > current_tpt)) { | |
1924 | IWL_DEBUG_RATE(mvm, | |
1925 | "Lower rate is better\n"); | |
1926 | action = RS_ACTION_DOWNSCALE; | |
1927 | goto out; | |
1928 | } | |
1929 | ||
1930 | if ((low_tpt == IWL_INVALID_VALUE) && | |
1931 | (low != IWL_RATE_INVALID)) { | |
4e4b815c | 1932 | IWL_DEBUG_RATE(mvm, |
e53839eb ES |
1933 | "No data about lower rate\n"); |
1934 | action = RS_ACTION_DOWNSCALE; | |
1935 | goto out; | |
1936 | } | |
1937 | ||
1938 | IWL_DEBUG_RATE(mvm, "Maintain rate\n"); | |
1939 | ||
1940 | out: | |
1941 | if ((action == RS_ACTION_DOWNSCALE) && (low != IWL_RATE_INVALID)) { | |
834437da | 1942 | if (sr >= RS_PERCENT(IWL_MVM_RS_SR_NO_DECREASE)) { |
e53839eb ES |
1943 | IWL_DEBUG_RATE(mvm, |
1944 | "SR is above NO DECREASE. Avoid downscale\n"); | |
1945 | action = RS_ACTION_STAY; | |
1946 | } else if (current_tpt > (100 * tbl->expected_tpt[low])) { | |
1947 | IWL_DEBUG_RATE(mvm, | |
1948 | "Current TPT is higher than max expected in low rate. Avoid downscale\n"); | |
1949 | action = RS_ACTION_STAY; | |
1950 | } else { | |
1951 | IWL_DEBUG_RATE(mvm, "Decrease rate\n"); | |
1952 | } | |
4e4b815c ES |
1953 | } |
1954 | ||
1955 | return action; | |
1956 | } | |
b3b06a32 | 1957 | |
d8bafeaf ES |
1958 | static bool rs_stbc_allow(struct iwl_mvm *mvm, struct ieee80211_sta *sta, |
1959 | struct iwl_lq_sta *lq_sta) | |
1960 | { | |
d8bafeaf ES |
1961 | /* Our chip supports Tx STBC and the peer is an HT/VHT STA which |
1962 | * supports STBC of at least 1*SS | |
1963 | */ | |
3d44eebf | 1964 | if (!lq_sta->stbc_capable) |
d8bafeaf ES |
1965 | return false; |
1966 | ||
d8bafeaf ES |
1967 | if (!iwl_mvm_bt_coex_is_mimo_allowed(mvm, sta)) |
1968 | return false; | |
1969 | ||
1970 | return true; | |
1971 | } | |
1972 | ||
2fd647f8 EP |
1973 | static void rs_get_adjacent_txp(struct iwl_mvm *mvm, int index, |
1974 | int *weaker, int *stronger) | |
1975 | { | |
834437da | 1976 | *weaker = index + IWL_MVM_RS_TPC_TX_POWER_STEP; |
2fd647f8 EP |
1977 | if (*weaker > TPC_MAX_REDUCTION) |
1978 | *weaker = TPC_INVALID; | |
1979 | ||
834437da | 1980 | *stronger = index - IWL_MVM_RS_TPC_TX_POWER_STEP; |
2fd647f8 EP |
1981 | if (*stronger < 0) |
1982 | *stronger = TPC_INVALID; | |
1983 | } | |
1984 | ||
1e9551de ES |
1985 | static bool rs_tpc_allowed(struct iwl_mvm *mvm, struct ieee80211_vif *vif, |
1986 | struct rs_rate *rate, enum ieee80211_band band) | |
2fd647f8 EP |
1987 | { |
1988 | int index = rate->index; | |
1e9551de ES |
1989 | bool cam = (iwlmvm_mod_params.power_scheme == IWL_POWER_SCHEME_CAM); |
1990 | bool sta_ps_disabled = (vif->type == NL80211_IFTYPE_STATION && | |
1991 | !vif->bss_conf.ps); | |
2fd647f8 | 1992 | |
1e9551de ES |
1993 | IWL_DEBUG_RATE(mvm, "cam: %d sta_ps_disabled %d\n", |
1994 | cam, sta_ps_disabled); | |
2fd647f8 EP |
1995 | /* |
1996 | * allow tpc only if power management is enabled, or bt coex | |
1997 | * activity grade allows it and we are on 2.4Ghz. | |
1998 | */ | |
1e9551de | 1999 | if ((cam || sta_ps_disabled) && |
2fd647f8 EP |
2000 | !iwl_mvm_bt_coex_is_tpc_allowed(mvm, band)) |
2001 | return false; | |
2002 | ||
2003 | IWL_DEBUG_RATE(mvm, "check rate, table type: %d\n", rate->type); | |
2004 | if (is_legacy(rate)) | |
2005 | return index == IWL_RATE_54M_INDEX; | |
2006 | if (is_ht(rate)) | |
2007 | return index == IWL_RATE_MCS_7_INDEX; | |
2008 | if (is_vht(rate)) | |
2009 | return index == IWL_RATE_MCS_7_INDEX || | |
2010 | index == IWL_RATE_MCS_8_INDEX || | |
2011 | index == IWL_RATE_MCS_9_INDEX; | |
2012 | ||
2013 | WARN_ON_ONCE(1); | |
2014 | return false; | |
2015 | } | |
2016 | ||
2017 | enum tpc_action { | |
2018 | TPC_ACTION_STAY, | |
2019 | TPC_ACTION_DECREASE, | |
2020 | TPC_ACTION_INCREASE, | |
2021 | TPC_ACTION_NO_RESTIRCTION, | |
2022 | }; | |
2023 | ||
2024 | static enum tpc_action rs_get_tpc_action(struct iwl_mvm *mvm, | |
2025 | s32 sr, int weak, int strong, | |
2026 | int current_tpt, | |
2027 | int weak_tpt, int strong_tpt) | |
2028 | { | |
2029 | /* stay until we have valid tpt */ | |
2030 | if (current_tpt == IWL_INVALID_VALUE) { | |
2031 | IWL_DEBUG_RATE(mvm, "no current tpt. stay.\n"); | |
2032 | return TPC_ACTION_STAY; | |
2033 | } | |
2034 | ||
2035 | /* Too many failures, increase txp */ | |
834437da ES |
2036 | if (sr <= RS_PERCENT(IWL_MVM_RS_TPC_SR_FORCE_INCREASE) || |
2037 | current_tpt == 0) { | |
2fd647f8 EP |
2038 | IWL_DEBUG_RATE(mvm, "increase txp because of weak SR\n"); |
2039 | return TPC_ACTION_NO_RESTIRCTION; | |
2040 | } | |
2041 | ||
2042 | /* try decreasing first if applicable */ | |
2043 | if (weak != TPC_INVALID) { | |
2044 | if (weak_tpt == IWL_INVALID_VALUE && | |
2045 | (strong_tpt == IWL_INVALID_VALUE || | |
2046 | current_tpt >= strong_tpt)) { | |
2047 | IWL_DEBUG_RATE(mvm, | |
2048 | "no weak txp measurement. decrease txp\n"); | |
2049 | return TPC_ACTION_DECREASE; | |
2050 | } | |
2051 | ||
2052 | if (weak_tpt > current_tpt) { | |
2053 | IWL_DEBUG_RATE(mvm, | |
2054 | "lower txp has better tpt. decrease txp\n"); | |
2055 | return TPC_ACTION_DECREASE; | |
2056 | } | |
2057 | } | |
2058 | ||
2059 | /* next, increase if needed */ | |
834437da ES |
2060 | if (sr < RS_PERCENT(IWL_MVM_RS_TPC_SR_NO_INCREASE) && |
2061 | strong != TPC_INVALID) { | |
2fd647f8 EP |
2062 | if (weak_tpt == IWL_INVALID_VALUE && |
2063 | strong_tpt != IWL_INVALID_VALUE && | |
2064 | current_tpt < strong_tpt) { | |
2065 | IWL_DEBUG_RATE(mvm, | |
2066 | "higher txp has better tpt. increase txp\n"); | |
2067 | return TPC_ACTION_INCREASE; | |
2068 | } | |
2069 | ||
2070 | if (weak_tpt < current_tpt && | |
2071 | (strong_tpt == IWL_INVALID_VALUE || | |
2072 | strong_tpt > current_tpt)) { | |
2073 | IWL_DEBUG_RATE(mvm, | |
2074 | "lower txp has worse tpt. increase txp\n"); | |
2075 | return TPC_ACTION_INCREASE; | |
2076 | } | |
2077 | } | |
2078 | ||
2079 | IWL_DEBUG_RATE(mvm, "no need to increase or decrease txp - stay\n"); | |
2080 | return TPC_ACTION_STAY; | |
2081 | } | |
2082 | ||
2083 | static bool rs_tpc_perform(struct iwl_mvm *mvm, | |
2084 | struct ieee80211_sta *sta, | |
2085 | struct iwl_lq_sta *lq_sta, | |
2086 | struct iwl_scale_tbl_info *tbl) | |
2087 | { | |
9d8ce6af | 2088 | struct iwl_mvm_sta *mvm_sta = iwl_mvm_sta_from_mac80211(sta); |
2fd647f8 EP |
2089 | struct ieee80211_vif *vif = mvm_sta->vif; |
2090 | struct ieee80211_chanctx_conf *chanctx_conf; | |
2091 | enum ieee80211_band band; | |
2092 | struct iwl_rate_scale_data *window; | |
2093 | struct rs_rate *rate = &tbl->rate; | |
2094 | enum tpc_action action; | |
2095 | s32 sr; | |
2096 | u8 cur = lq_sta->lq.reduced_tpc; | |
2097 | int current_tpt; | |
2098 | int weak, strong; | |
2099 | int weak_tpt = IWL_INVALID_VALUE, strong_tpt = IWL_INVALID_VALUE; | |
2100 | ||
9a75b3df | 2101 | #ifdef CONFIG_MAC80211_DEBUGFS |
ae969afe | 2102 | if (lq_sta->pers.dbg_fixed_txp_reduction <= TPC_MAX_REDUCTION) { |
3c6acb61 | 2103 | IWL_DEBUG_RATE(mvm, "fixed tpc: %d\n", |
ae969afe EP |
2104 | lq_sta->pers.dbg_fixed_txp_reduction); |
2105 | lq_sta->lq.reduced_tpc = lq_sta->pers.dbg_fixed_txp_reduction; | |
2106 | return cur != lq_sta->pers.dbg_fixed_txp_reduction; | |
9a75b3df EP |
2107 | } |
2108 | #endif | |
2109 | ||
2fd647f8 EP |
2110 | rcu_read_lock(); |
2111 | chanctx_conf = rcu_dereference(vif->chanctx_conf); | |
2112 | if (WARN_ON(!chanctx_conf)) | |
2113 | band = IEEE80211_NUM_BANDS; | |
2114 | else | |
2115 | band = chanctx_conf->def.chan->band; | |
2116 | rcu_read_unlock(); | |
2117 | ||
1e9551de | 2118 | if (!rs_tpc_allowed(mvm, vif, rate, band)) { |
2fd647f8 | 2119 | IWL_DEBUG_RATE(mvm, |
3c6acb61 | 2120 | "tpc is not allowed. remove txp restrictions\n"); |
2fd647f8 EP |
2121 | lq_sta->lq.reduced_tpc = TPC_NO_REDUCTION; |
2122 | return cur != TPC_NO_REDUCTION; | |
2123 | } | |
2124 | ||
2125 | rs_get_adjacent_txp(mvm, cur, &weak, &strong); | |
2126 | ||
2127 | /* Collect measured throughputs for current and adjacent rates */ | |
2128 | window = tbl->tpc_win; | |
2129 | sr = window[cur].success_ratio; | |
2130 | current_tpt = window[cur].average_tpt; | |
2131 | if (weak != TPC_INVALID) | |
2132 | weak_tpt = window[weak].average_tpt; | |
2133 | if (strong != TPC_INVALID) | |
2134 | strong_tpt = window[strong].average_tpt; | |
2135 | ||
2136 | IWL_DEBUG_RATE(mvm, | |
2137 | "(TPC: %d): cur_tpt %d SR %d weak %d strong %d weak_tpt %d strong_tpt %d\n", | |
2138 | cur, current_tpt, sr, weak, strong, | |
2139 | weak_tpt, strong_tpt); | |
2140 | ||
2141 | action = rs_get_tpc_action(mvm, sr, weak, strong, | |
2142 | current_tpt, weak_tpt, strong_tpt); | |
2143 | ||
2144 | /* override actions if we are on the edge */ | |
2145 | if (weak == TPC_INVALID && action == TPC_ACTION_DECREASE) { | |
3c6acb61 | 2146 | IWL_DEBUG_RATE(mvm, "already in lowest txp, stay\n"); |
2fd647f8 EP |
2147 | action = TPC_ACTION_STAY; |
2148 | } else if (strong == TPC_INVALID && | |
2149 | (action == TPC_ACTION_INCREASE || | |
2150 | action == TPC_ACTION_NO_RESTIRCTION)) { | |
3c6acb61 | 2151 | IWL_DEBUG_RATE(mvm, "already in highest txp, stay\n"); |
2fd647f8 EP |
2152 | action = TPC_ACTION_STAY; |
2153 | } | |
2154 | ||
2155 | switch (action) { | |
2156 | case TPC_ACTION_DECREASE: | |
2157 | lq_sta->lq.reduced_tpc = weak; | |
2158 | return true; | |
2159 | case TPC_ACTION_INCREASE: | |
2160 | lq_sta->lq.reduced_tpc = strong; | |
2161 | return true; | |
2162 | case TPC_ACTION_NO_RESTIRCTION: | |
2163 | lq_sta->lq.reduced_tpc = TPC_NO_REDUCTION; | |
2164 | return true; | |
2165 | case TPC_ACTION_STAY: | |
2166 | /* do nothing */ | |
2167 | break; | |
2168 | } | |
2169 | return false; | |
2170 | } | |
2171 | ||
8ca151b5 JB |
2172 | /* |
2173 | * Do rate scaling and search for new modulation mode. | |
2174 | */ | |
2175 | static void rs_rate_scale_perform(struct iwl_mvm *mvm, | |
8ca151b5 | 2176 | struct ieee80211_sta *sta, |
1ebc8f2e ES |
2177 | struct iwl_lq_sta *lq_sta, |
2178 | int tid) | |
8ca151b5 | 2179 | { |
8ca151b5 JB |
2180 | int low = IWL_RATE_INVALID; |
2181 | int high = IWL_RATE_INVALID; | |
2182 | int index; | |
8ca151b5 JB |
2183 | struct iwl_rate_scale_data *window = NULL; |
2184 | int current_tpt = IWL_INVALID_VALUE; | |
2185 | int low_tpt = IWL_INVALID_VALUE; | |
2186 | int high_tpt = IWL_INVALID_VALUE; | |
2187 | u32 fail_count; | |
4e4b815c | 2188 | enum rs_action scale_action = RS_ACTION_STAY; |
8ca151b5 JB |
2189 | u16 rate_mask; |
2190 | u8 update_lq = 0; | |
2191 | struct iwl_scale_tbl_info *tbl, *tbl1; | |
8ca151b5 JB |
2192 | u8 active_tbl = 0; |
2193 | u8 done_search = 0; | |
2194 | u16 high_low; | |
2195 | s32 sr; | |
9d015a03 | 2196 | u8 prev_agg = lq_sta->is_agg; |
9d8ce6af | 2197 | struct iwl_mvm_sta *sta_priv = iwl_mvm_sta_from_mac80211(sta); |
8ca151b5 | 2198 | struct iwl_mvm_tid_data *tid_data; |
5aa33553 | 2199 | struct rs_rate *rate; |
8ca151b5 | 2200 | |
efed6640 | 2201 | lq_sta->is_agg = !!sta_priv->agg_tids; |
8ca151b5 JB |
2202 | |
2203 | /* | |
2204 | * Select rate-scale / modulation-mode table to work with in | |
2205 | * the rest of this function: "search" if searching for better | |
2206 | * modulation mode, or "active" if doing rate scaling within a mode. | |
2207 | */ | |
2208 | if (!lq_sta->search_better_tbl) | |
2209 | active_tbl = lq_sta->active_tbl; | |
2210 | else | |
2211 | active_tbl = 1 - lq_sta->active_tbl; | |
2212 | ||
2213 | tbl = &(lq_sta->lq_info[active_tbl]); | |
5aa33553 | 2214 | rate = &tbl->rate; |
8ca151b5 | 2215 | |
9d015a03 ES |
2216 | if (prev_agg != lq_sta->is_agg) { |
2217 | IWL_DEBUG_RATE(mvm, | |
2218 | "Aggregation changed: prev %d current %d. Update expected TPT table\n", | |
2219 | prev_agg, lq_sta->is_agg); | |
2220 | rs_set_expected_tpt_table(lq_sta, tbl); | |
b804eeb6 | 2221 | rs_rate_scale_clear_tbl_windows(mvm, tbl); |
9d015a03 ES |
2222 | } |
2223 | ||
8ca151b5 | 2224 | /* current tx rate */ |
fcc5e851 | 2225 | index = rate->index; |
8ca151b5 | 2226 | |
8ca151b5 | 2227 | /* rates available for this association, and for modulation mode */ |
a8ff14f5 | 2228 | rate_mask = rs_get_supported_rates(lq_sta, rate); |
8ca151b5 | 2229 | |
ca6f38ff | 2230 | if (!(BIT(index) & rate_mask)) { |
8ca151b5 JB |
2231 | IWL_ERR(mvm, "Current Rate is not valid\n"); |
2232 | if (lq_sta->search_better_tbl) { | |
2233 | /* revert to active table if search table is not valid*/ | |
5aa33553 | 2234 | rate->type = LQ_NONE; |
8ca151b5 JB |
2235 | lq_sta->search_better_tbl = 0; |
2236 | tbl = &(lq_sta->lq_info[lq_sta->active_tbl]); | |
7b9d74e4 | 2237 | rs_update_rate_tbl(mvm, sta, lq_sta, tbl); |
8ca151b5 JB |
2238 | } |
2239 | return; | |
2240 | } | |
2241 | ||
2242 | /* Get expected throughput table and history window for current rate */ | |
2243 | if (!tbl->expected_tpt) { | |
2244 | IWL_ERR(mvm, "tbl->expected_tpt is NULL\n"); | |
2245 | return; | |
2246 | } | |
2247 | ||
2536e7c3 | 2248 | /* TODO: handle rate_idx_mask and rate_idx_mcs_mask */ |
8ca151b5 JB |
2249 | window = &(tbl->win[index]); |
2250 | ||
2251 | /* | |
2252 | * If there is not enough history to calculate actual average | |
2253 | * throughput, keep analyzing results of more tx frames, without | |
2254 | * changing rate or mode (bypass most of the rest of this function). | |
2255 | * Set up new rate table in uCode only if old rate is not supported | |
2256 | * in current association (use new rate found above). | |
2257 | */ | |
2258 | fail_count = window->counter - window->success_counter; | |
834437da ES |
2259 | if ((fail_count < IWL_MVM_RS_RATE_MIN_FAILURE_TH) && |
2260 | (window->success_counter < IWL_MVM_RS_RATE_MIN_SUCCESS_TH)) { | |
8ca151b5 | 2261 | IWL_DEBUG_RATE(mvm, |
cc60c6e9 ES |
2262 | "%s: Test Window: succ %d total %d\n", |
2263 | rs_pretty_rate(rate), | |
2264 | window->success_counter, window->counter); | |
8ca151b5 JB |
2265 | |
2266 | /* Can't calculate this yet; not enough history */ | |
2267 | window->average_tpt = IWL_INVALID_VALUE; | |
2268 | ||
2269 | /* Should we stay with this modulation mode, | |
2270 | * or search for a new one? */ | |
2271 | rs_stay_in_table(lq_sta, false); | |
2272 | ||
fcc5e851 | 2273 | return; |
8ca151b5 | 2274 | } |
8ca151b5 JB |
2275 | |
2276 | /* If we are searching for better modulation mode, check success. */ | |
2277 | if (lq_sta->search_better_tbl) { | |
2278 | /* If good success, continue using the "search" mode; | |
2279 | * no need to send new link quality command, since we're | |
2280 | * continuing to use the setup that we've been trying. */ | |
2281 | if (window->average_tpt > lq_sta->last_tpt) { | |
2282 | IWL_DEBUG_RATE(mvm, | |
4d30ee82 ES |
2283 | "SWITCHING TO NEW TABLE SR: %d " |
2284 | "cur-tpt %d old-tpt %d\n", | |
8ca151b5 JB |
2285 | window->success_ratio, |
2286 | window->average_tpt, | |
2287 | lq_sta->last_tpt); | |
2288 | ||
8ca151b5 JB |
2289 | /* Swap tables; "search" becomes "active" */ |
2290 | lq_sta->active_tbl = active_tbl; | |
2291 | current_tpt = window->average_tpt; | |
2292 | /* Else poor success; go back to mode in "active" table */ | |
2293 | } else { | |
2294 | IWL_DEBUG_RATE(mvm, | |
4d30ee82 ES |
2295 | "GOING BACK TO THE OLD TABLE: SR %d " |
2296 | "cur-tpt %d old-tpt %d\n", | |
8ca151b5 JB |
2297 | window->success_ratio, |
2298 | window->average_tpt, | |
2299 | lq_sta->last_tpt); | |
2300 | ||
2301 | /* Nullify "search" table */ | |
5aa33553 | 2302 | rate->type = LQ_NONE; |
8ca151b5 JB |
2303 | |
2304 | /* Revert to "active" table */ | |
2305 | active_tbl = lq_sta->active_tbl; | |
2306 | tbl = &(lq_sta->lq_info[active_tbl]); | |
2307 | ||
2308 | /* Revert to "active" rate and throughput info */ | |
8fc7c58c | 2309 | index = tbl->rate.index; |
8ca151b5 JB |
2310 | current_tpt = lq_sta->last_tpt; |
2311 | ||
2312 | /* Need to set up a new rate table in uCode */ | |
2313 | update_lq = 1; | |
2314 | } | |
2315 | ||
2316 | /* Either way, we've made a decision; modulation mode | |
2317 | * search is done, allow rate adjustment next time. */ | |
2318 | lq_sta->search_better_tbl = 0; | |
2319 | done_search = 1; /* Don't switch modes below! */ | |
2320 | goto lq_update; | |
2321 | } | |
2322 | ||
2323 | /* (Else) not in search of better modulation mode, try for better | |
2324 | * starting rate, while staying in this mode. */ | |
ca6f38ff | 2325 | high_low = rs_get_adjacent_rate(mvm, index, rate_mask, rate->type); |
8ca151b5 JB |
2326 | low = high_low & 0xff; |
2327 | high = (high_low >> 8) & 0xff; | |
2328 | ||
2536e7c3 | 2329 | /* TODO: handle rate_idx_mask and rate_idx_mcs_mask */ |
8ca151b5 JB |
2330 | |
2331 | sr = window->success_ratio; | |
2332 | ||
2333 | /* Collect measured throughputs for current and adjacent rates */ | |
2334 | current_tpt = window->average_tpt; | |
2335 | if (low != IWL_RATE_INVALID) | |
2336 | low_tpt = tbl->win[low].average_tpt; | |
2337 | if (high != IWL_RATE_INVALID) | |
2338 | high_tpt = tbl->win[high].average_tpt; | |
2339 | ||
4d30ee82 | 2340 | IWL_DEBUG_RATE(mvm, |
cc60c6e9 ES |
2341 | "%s: cur_tpt %d SR %d low %d high %d low_tpt %d high_tpt %d\n", |
2342 | rs_pretty_rate(rate), current_tpt, sr, | |
5aa33553 | 2343 | low, high, low_tpt, high_tpt); |
4d30ee82 | 2344 | |
4e4b815c ES |
2345 | scale_action = rs_get_rate_action(mvm, tbl, sr, low, high, |
2346 | current_tpt, low_tpt, high_tpt); | |
8ca151b5 | 2347 | |
393b9e5b | 2348 | /* Force a search in case BT doesn't like us being in MIMO */ |
5aa33553 | 2349 | if (is_mimo(rate) && |
393b9e5b | 2350 | !iwl_mvm_bt_coex_is_mimo_allowed(mvm, sta)) { |
4d30ee82 ES |
2351 | IWL_DEBUG_RATE(mvm, |
2352 | "BT Coex forbids MIMO. Search for new config\n"); | |
36946ce6 EG |
2353 | rs_stay_in_table(lq_sta, true); |
2354 | goto lq_update; | |
2355 | } | |
2356 | ||
8ca151b5 | 2357 | switch (scale_action) { |
4e4b815c | 2358 | case RS_ACTION_DOWNSCALE: |
8ca151b5 JB |
2359 | /* Decrease starting rate, update uCode's rate table */ |
2360 | if (low != IWL_RATE_INVALID) { | |
2361 | update_lq = 1; | |
2362 | index = low; | |
4d30ee82 ES |
2363 | } else { |
2364 | IWL_DEBUG_RATE(mvm, | |
2365 | "At the bottom rate. Can't decrease\n"); | |
8ca151b5 JB |
2366 | } |
2367 | ||
2368 | break; | |
4e4b815c | 2369 | case RS_ACTION_UPSCALE: |
8ca151b5 JB |
2370 | /* Increase starting rate, update uCode's rate table */ |
2371 | if (high != IWL_RATE_INVALID) { | |
2372 | update_lq = 1; | |
2373 | index = high; | |
4d30ee82 ES |
2374 | } else { |
2375 | IWL_DEBUG_RATE(mvm, | |
2376 | "At the top rate. Can't increase\n"); | |
8ca151b5 JB |
2377 | } |
2378 | ||
2379 | break; | |
4e4b815c | 2380 | case RS_ACTION_STAY: |
8ca151b5 | 2381 | /* No change */ |
e6c8d602 ES |
2382 | if (lq_sta->rs_state == RS_STATE_STAY_IN_COLUMN) |
2383 | update_lq = rs_tpc_perform(mvm, sta, lq_sta, tbl); | |
2fd647f8 | 2384 | break; |
8ca151b5 JB |
2385 | default: |
2386 | break; | |
2387 | } | |
2388 | ||
8ca151b5 JB |
2389 | lq_update: |
2390 | /* Replace uCode's rate table for the destination station. */ | |
5aa33553 ES |
2391 | if (update_lq) { |
2392 | tbl->rate.index = index; | |
1191f646 ES |
2393 | if (IWL_MVM_RS_80_20_FAR_RANGE_TWEAK) |
2394 | rs_tweak_rate_tbl(mvm, sta, lq_sta, tbl, scale_action); | |
7b9d74e4 | 2395 | rs_update_rate_tbl(mvm, sta, lq_sta, tbl); |
5aa33553 | 2396 | } |
8ca151b5 JB |
2397 | |
2398 | rs_stay_in_table(lq_sta, false); | |
2399 | ||
2400 | /* | |
2401 | * Search for new modulation mode if we're: | |
2402 | * 1) Not changing rates right now | |
2403 | * 2) Not just finishing up a search | |
2404 | * 3) Allowing a new search | |
2405 | */ | |
2406 | if (!update_lq && !done_search && | |
b3b06a32 ES |
2407 | lq_sta->rs_state == RS_STATE_SEARCH_CYCLE_STARTED |
2408 | && window->counter) { | |
2409 | enum rs_column next_column; | |
2410 | ||
8ca151b5 JB |
2411 | /* Save current throughput to compare with "search" throughput*/ |
2412 | lq_sta->last_tpt = current_tpt; | |
2413 | ||
4d30ee82 | 2414 | IWL_DEBUG_RATE(mvm, |
b3b06a32 ES |
2415 | "Start Search: update_lq %d done_search %d rs_state %d win->counter %d\n", |
2416 | update_lq, done_search, lq_sta->rs_state, | |
4d30ee82 | 2417 | window->counter); |
b3b06a32 ES |
2418 | |
2419 | next_column = rs_get_next_column(mvm, lq_sta, sta, tbl); | |
2420 | if (next_column != RS_COLUMN_INVALID) { | |
2421 | int ret = rs_switch_to_column(mvm, lq_sta, sta, | |
2422 | next_column); | |
2423 | if (!ret) | |
2424 | lq_sta->search_better_tbl = 1; | |
2425 | } else { | |
2426 | IWL_DEBUG_RATE(mvm, | |
2427 | "No more columns to explore in search cycle. Go to RS_STATE_SEARCH_CYCLE_ENDED\n"); | |
2428 | lq_sta->rs_state = RS_STATE_SEARCH_CYCLE_ENDED; | |
2429 | } | |
8ca151b5 JB |
2430 | |
2431 | /* If new "search" mode was selected, set up in uCode table */ | |
2432 | if (lq_sta->search_better_tbl) { | |
2433 | /* Access the "search" table, clear its history. */ | |
2434 | tbl = &(lq_sta->lq_info[(1 - lq_sta->active_tbl)]); | |
b804eeb6 | 2435 | rs_rate_scale_clear_tbl_windows(mvm, tbl); |
8ca151b5 JB |
2436 | |
2437 | /* Use new "search" start rate */ | |
8fc7c58c | 2438 | index = tbl->rate.index; |
8ca151b5 | 2439 | |
b3b06a32 ES |
2440 | rs_dump_rate(mvm, &tbl->rate, |
2441 | "Switch to SEARCH TABLE:"); | |
7b9d74e4 | 2442 | rs_update_rate_tbl(mvm, sta, lq_sta, tbl); |
8ca151b5 JB |
2443 | } else { |
2444 | done_search = 1; | |
2445 | } | |
2446 | } | |
2447 | ||
b3b06a32 | 2448 | if (done_search && lq_sta->rs_state == RS_STATE_SEARCH_CYCLE_ENDED) { |
8ca151b5 JB |
2449 | /* If the "active" (non-search) mode was legacy, |
2450 | * and we've tried switching antennas, | |
2451 | * but we haven't been able to try HT modes (not available), | |
2452 | * stay with best antenna legacy modulation for a while | |
2453 | * before next round of mode comparisons. */ | |
2454 | tbl1 = &(lq_sta->lq_info[lq_sta->active_tbl]); | |
fd7dbee5 | 2455 | if (is_legacy(&tbl1->rate)) { |
8ca151b5 | 2456 | IWL_DEBUG_RATE(mvm, "LQ: STAY in legacy table\n"); |
fd7dbee5 ES |
2457 | |
2458 | if (tid != IWL_MAX_TID_COUNT) { | |
2459 | tid_data = &sta_priv->tid_data[tid]; | |
2460 | if (tid_data->state != IWL_AGG_OFF) { | |
2461 | IWL_DEBUG_RATE(mvm, | |
2462 | "Stop aggregation on tid %d\n", | |
2463 | tid); | |
2464 | ieee80211_stop_tx_ba_session(sta, tid); | |
2465 | } | |
2466 | } | |
8ca151b5 | 2467 | rs_set_stay_in_table(mvm, 1, lq_sta); |
b3b06a32 | 2468 | } else { |
8ca151b5 JB |
2469 | /* If we're in an HT mode, and all 3 mode switch actions |
2470 | * have been tried and compared, stay in this best modulation | |
2471 | * mode for a while before next round of mode comparisons. */ | |
8ca151b5 JB |
2472 | if ((lq_sta->last_tpt > IWL_AGG_TPT_THREHOLD) && |
2473 | (lq_sta->tx_agg_tid_en & (1 << tid)) && | |
2474 | (tid != IWL_MAX_TID_COUNT)) { | |
2475 | tid_data = &sta_priv->tid_data[tid]; | |
2476 | if (tid_data->state == IWL_AGG_OFF) { | |
2477 | IWL_DEBUG_RATE(mvm, | |
2478 | "try to aggregate tid %d\n", | |
2479 | tid); | |
2480 | rs_tl_turn_on_agg(mvm, tid, | |
2481 | lq_sta, sta); | |
2482 | } | |
2483 | } | |
2484 | rs_set_stay_in_table(mvm, 0, lq_sta); | |
2485 | } | |
2486 | } | |
8ca151b5 JB |
2487 | } |
2488 | ||
361dbec8 ES |
2489 | struct rs_init_rate_info { |
2490 | s8 rssi; | |
2491 | u8 rate_idx; | |
2492 | }; | |
2493 | ||
b503ed60 | 2494 | static const struct rs_init_rate_info rs_optimal_rates_24ghz_legacy[] = { |
361dbec8 ES |
2495 | { -60, IWL_RATE_54M_INDEX }, |
2496 | { -64, IWL_RATE_48M_INDEX }, | |
2497 | { -68, IWL_RATE_36M_INDEX }, | |
2498 | { -80, IWL_RATE_24M_INDEX }, | |
2499 | { -84, IWL_RATE_18M_INDEX }, | |
2500 | { -85, IWL_RATE_12M_INDEX }, | |
2501 | { -86, IWL_RATE_11M_INDEX }, | |
2502 | { -88, IWL_RATE_5M_INDEX }, | |
2503 | { -90, IWL_RATE_2M_INDEX }, | |
2504 | { S8_MIN, IWL_RATE_1M_INDEX }, | |
2505 | }; | |
2506 | ||
b503ed60 | 2507 | static const struct rs_init_rate_info rs_optimal_rates_5ghz_legacy[] = { |
361dbec8 ES |
2508 | { -60, IWL_RATE_54M_INDEX }, |
2509 | { -64, IWL_RATE_48M_INDEX }, | |
2510 | { -72, IWL_RATE_36M_INDEX }, | |
2511 | { -80, IWL_RATE_24M_INDEX }, | |
2512 | { -84, IWL_RATE_18M_INDEX }, | |
2513 | { -85, IWL_RATE_12M_INDEX }, | |
2514 | { -87, IWL_RATE_9M_INDEX }, | |
2515 | { S8_MIN, IWL_RATE_6M_INDEX }, | |
2516 | }; | |
2517 | ||
b503ed60 ES |
2518 | static const struct rs_init_rate_info rs_optimal_rates_ht[] = { |
2519 | { -60, IWL_RATE_MCS_7_INDEX }, | |
2520 | { -64, IWL_RATE_MCS_6_INDEX }, | |
2521 | { -68, IWL_RATE_MCS_5_INDEX }, | |
2522 | { -72, IWL_RATE_MCS_4_INDEX }, | |
2523 | { -80, IWL_RATE_MCS_3_INDEX }, | |
2524 | { -84, IWL_RATE_MCS_2_INDEX }, | |
2525 | { -85, IWL_RATE_MCS_1_INDEX }, | |
2526 | { S8_MIN, IWL_RATE_MCS_0_INDEX}, | |
2527 | }; | |
2528 | ||
2529 | static const struct rs_init_rate_info rs_optimal_rates_vht_20mhz[] = { | |
2530 | { -60, IWL_RATE_MCS_8_INDEX }, | |
2531 | { -64, IWL_RATE_MCS_7_INDEX }, | |
2532 | { -68, IWL_RATE_MCS_6_INDEX }, | |
2533 | { -72, IWL_RATE_MCS_5_INDEX }, | |
2534 | { -80, IWL_RATE_MCS_4_INDEX }, | |
2535 | { -84, IWL_RATE_MCS_3_INDEX }, | |
2536 | { -85, IWL_RATE_MCS_2_INDEX }, | |
2537 | { -87, IWL_RATE_MCS_1_INDEX }, | |
2538 | { S8_MIN, IWL_RATE_MCS_0_INDEX}, | |
2539 | }; | |
2540 | ||
2541 | static const struct rs_init_rate_info rs_optimal_rates_vht_40_80mhz[] = { | |
2542 | { -60, IWL_RATE_MCS_9_INDEX }, | |
2543 | { -64, IWL_RATE_MCS_8_INDEX }, | |
2544 | { -68, IWL_RATE_MCS_7_INDEX }, | |
2545 | { -72, IWL_RATE_MCS_6_INDEX }, | |
2546 | { -80, IWL_RATE_MCS_5_INDEX }, | |
2547 | { -84, IWL_RATE_MCS_4_INDEX }, | |
2548 | { -85, IWL_RATE_MCS_3_INDEX }, | |
2549 | { -87, IWL_RATE_MCS_2_INDEX }, | |
2550 | { -88, IWL_RATE_MCS_1_INDEX }, | |
2551 | { S8_MIN, IWL_RATE_MCS_0_INDEX }, | |
2552 | }; | |
2553 | ||
99319b8c GG |
2554 | #define IWL_RS_LOW_RSSI_THRESHOLD (-76) /* dBm */ |
2555 | ||
b503ed60 ES |
2556 | /* Init the optimal rate based on STA caps |
2557 | * This combined with rssi is used to report the last tx rate | |
2558 | * to userspace when we haven't transmitted enough frames. | |
2559 | */ | |
2560 | static void rs_init_optimal_rate(struct iwl_mvm *mvm, | |
2561 | struct ieee80211_sta *sta, | |
2562 | struct iwl_lq_sta *lq_sta) | |
2563 | { | |
2564 | struct rs_rate *rate = &lq_sta->optimal_rate; | |
2565 | ||
2566 | if (lq_sta->max_mimo2_rate_idx != IWL_RATE_INVALID) | |
2567 | rate->type = lq_sta->is_vht ? LQ_VHT_MIMO2 : LQ_HT_MIMO2; | |
2568 | else if (lq_sta->max_siso_rate_idx != IWL_RATE_INVALID) | |
2569 | rate->type = lq_sta->is_vht ? LQ_VHT_SISO : LQ_HT_SISO; | |
2570 | else if (lq_sta->band == IEEE80211_BAND_5GHZ) | |
2571 | rate->type = LQ_LEGACY_A; | |
2572 | else | |
2573 | rate->type = LQ_LEGACY_G; | |
2574 | ||
2575 | rate->bw = rs_bw_from_sta_bw(sta); | |
2576 | rate->sgi = rs_sgi_allow(mvm, sta, rate, NULL); | |
2577 | ||
2578 | /* ANT/LDPC/STBC aren't relevant for the rate reported to userspace */ | |
2579 | ||
2580 | if (is_mimo(rate)) { | |
2581 | lq_sta->optimal_rate_mask = lq_sta->active_mimo2_rate; | |
2582 | } else if (is_siso(rate)) { | |
2583 | lq_sta->optimal_rate_mask = lq_sta->active_siso_rate; | |
2584 | } else { | |
2585 | lq_sta->optimal_rate_mask = lq_sta->active_legacy_rate; | |
2586 | ||
2587 | if (lq_sta->band == IEEE80211_BAND_5GHZ) { | |
2588 | lq_sta->optimal_rates = rs_optimal_rates_5ghz_legacy; | |
2589 | lq_sta->optimal_nentries = | |
2590 | ARRAY_SIZE(rs_optimal_rates_5ghz_legacy); | |
2591 | } else { | |
2592 | lq_sta->optimal_rates = rs_optimal_rates_24ghz_legacy; | |
2593 | lq_sta->optimal_nentries = | |
2594 | ARRAY_SIZE(rs_optimal_rates_24ghz_legacy); | |
2595 | } | |
2596 | } | |
2597 | ||
2598 | if (is_vht(rate)) { | |
2599 | if (rate->bw == RATE_MCS_CHAN_WIDTH_20) { | |
2600 | lq_sta->optimal_rates = rs_optimal_rates_vht_20mhz; | |
2601 | lq_sta->optimal_nentries = | |
2602 | ARRAY_SIZE(rs_optimal_rates_vht_20mhz); | |
2603 | } else { | |
2604 | lq_sta->optimal_rates = rs_optimal_rates_vht_40_80mhz; | |
2605 | lq_sta->optimal_nentries = | |
2606 | ARRAY_SIZE(rs_optimal_rates_vht_40_80mhz); | |
2607 | } | |
2608 | } else if (is_ht(rate)) { | |
2609 | lq_sta->optimal_rates = rs_optimal_rates_ht; | |
2610 | lq_sta->optimal_nentries = ARRAY_SIZE(rs_optimal_rates_ht); | |
2611 | } | |
2612 | } | |
2613 | ||
2614 | /* Compute the optimal rate index based on RSSI */ | |
2615 | static struct rs_rate *rs_get_optimal_rate(struct iwl_mvm *mvm, | |
2616 | struct iwl_lq_sta *lq_sta) | |
2617 | { | |
2618 | struct rs_rate *rate = &lq_sta->optimal_rate; | |
2619 | int i; | |
2620 | ||
2621 | rate->index = find_first_bit(&lq_sta->optimal_rate_mask, | |
2622 | BITS_PER_LONG); | |
2623 | ||
2624 | for (i = 0; i < lq_sta->optimal_nentries; i++) { | |
2625 | int rate_idx = lq_sta->optimal_rates[i].rate_idx; | |
2626 | ||
2627 | if ((lq_sta->pers.last_rssi >= lq_sta->optimal_rates[i].rssi) && | |
2628 | (BIT(rate_idx) & lq_sta->optimal_rate_mask)) { | |
2629 | rate->index = rate_idx; | |
2630 | break; | |
2631 | } | |
2632 | } | |
2633 | ||
b503ed60 ES |
2634 | return rate; |
2635 | } | |
2636 | ||
361dbec8 ES |
2637 | /* Choose an initial legacy rate and antenna to use based on the RSSI |
2638 | * of last Rx | |
2639 | */ | |
2640 | static void rs_get_initial_rate(struct iwl_mvm *mvm, | |
99319b8c | 2641 | struct ieee80211_sta *sta, |
361dbec8 ES |
2642 | struct iwl_lq_sta *lq_sta, |
2643 | enum ieee80211_band band, | |
2644 | struct rs_rate *rate) | |
2645 | { | |
2646 | int i, nentries; | |
99319b8c | 2647 | unsigned long active_rate; |
361dbec8 ES |
2648 | s8 best_rssi = S8_MIN; |
2649 | u8 best_ant = ANT_NONE; | |
a0544272 | 2650 | u8 valid_tx_ant = iwl_mvm_get_valid_tx_ant(mvm); |
361dbec8 ES |
2651 | const struct rs_init_rate_info *initial_rates; |
2652 | ||
2653 | for (i = 0; i < ARRAY_SIZE(lq_sta->pers.chain_signal); i++) { | |
2654 | if (!(lq_sta->pers.chains & BIT(i))) | |
2655 | continue; | |
2656 | ||
2657 | if (lq_sta->pers.chain_signal[i] > best_rssi) { | |
2658 | best_rssi = lq_sta->pers.chain_signal[i]; | |
2659 | best_ant = BIT(i); | |
2660 | } | |
2661 | } | |
2662 | ||
2663 | IWL_DEBUG_RATE(mvm, "Best ANT: %s Best RSSI: %d\n", | |
2664 | rs_pretty_ant(best_ant), best_rssi); | |
2665 | ||
2666 | if (best_ant != ANT_A && best_ant != ANT_B) | |
2667 | rate->ant = first_antenna(valid_tx_ant); | |
2668 | else | |
2669 | rate->ant = best_ant; | |
2670 | ||
2671 | rate->sgi = false; | |
2672 | rate->ldpc = false; | |
2673 | rate->bw = RATE_MCS_CHAN_WIDTH_20; | |
2674 | ||
2675 | rate->index = find_first_bit(&lq_sta->active_legacy_rate, | |
2676 | BITS_PER_LONG); | |
2677 | ||
2678 | if (band == IEEE80211_BAND_5GHZ) { | |
2679 | rate->type = LQ_LEGACY_A; | |
b503ed60 ES |
2680 | initial_rates = rs_optimal_rates_5ghz_legacy; |
2681 | nentries = ARRAY_SIZE(rs_optimal_rates_5ghz_legacy); | |
361dbec8 ES |
2682 | } else { |
2683 | rate->type = LQ_LEGACY_G; | |
b503ed60 ES |
2684 | initial_rates = rs_optimal_rates_24ghz_legacy; |
2685 | nentries = ARRAY_SIZE(rs_optimal_rates_24ghz_legacy); | |
361dbec8 ES |
2686 | } |
2687 | ||
99319b8c GG |
2688 | if (!IWL_MVM_RS_RSSI_BASED_INIT_RATE) |
2689 | goto out; | |
2690 | ||
2691 | /* Start from a higher rate if the corresponding debug capability | |
2692 | * is enabled. The rate is chosen according to AP capabilities. | |
2693 | * In case of VHT/HT when the rssi is low fallback to the case of | |
2694 | * legacy rates. | |
2695 | */ | |
2696 | if (sta->vht_cap.vht_supported && | |
2697 | best_rssi > IWL_RS_LOW_RSSI_THRESHOLD) { | |
2698 | if (sta->bandwidth >= IEEE80211_STA_RX_BW_40) { | |
2699 | initial_rates = rs_optimal_rates_vht_40_80mhz; | |
2700 | nentries = ARRAY_SIZE(rs_optimal_rates_vht_40_80mhz); | |
2701 | if (sta->bandwidth >= IEEE80211_STA_RX_BW_80) | |
2702 | rate->bw = RATE_MCS_CHAN_WIDTH_80; | |
2703 | else | |
2704 | rate->bw = RATE_MCS_CHAN_WIDTH_40; | |
2705 | } else if (sta->bandwidth == IEEE80211_STA_RX_BW_20) { | |
2706 | initial_rates = rs_optimal_rates_vht_20mhz; | |
2707 | nentries = ARRAY_SIZE(rs_optimal_rates_vht_20mhz); | |
2708 | rate->bw = RATE_MCS_CHAN_WIDTH_20; | |
2709 | } else { | |
2710 | IWL_ERR(mvm, "Invalid BW %d\n", sta->bandwidth); | |
2711 | goto out; | |
361dbec8 | 2712 | } |
99319b8c GG |
2713 | active_rate = lq_sta->active_siso_rate; |
2714 | rate->type = LQ_VHT_SISO; | |
2715 | } else if (sta->ht_cap.ht_supported && | |
2716 | best_rssi > IWL_RS_LOW_RSSI_THRESHOLD) { | |
2717 | initial_rates = rs_optimal_rates_ht; | |
2718 | nentries = ARRAY_SIZE(rs_optimal_rates_ht); | |
2719 | active_rate = lq_sta->active_siso_rate; | |
2720 | rate->type = LQ_HT_SISO; | |
2721 | } else { | |
2722 | active_rate = lq_sta->active_legacy_rate; | |
361dbec8 ES |
2723 | } |
2724 | ||
99319b8c GG |
2725 | for (i = 0; i < nentries; i++) { |
2726 | int rate_idx = initial_rates[i].rate_idx; | |
2727 | ||
2728 | if ((best_rssi >= initial_rates[i].rssi) && | |
2729 | (BIT(rate_idx) & active_rate)) { | |
2730 | rate->index = rate_idx; | |
2731 | break; | |
2732 | } | |
2733 | } | |
2734 | ||
2735 | out: | |
2736 | rs_dump_rate(mvm, rate, "INITIAL"); | |
361dbec8 ES |
2737 | } |
2738 | ||
2739 | /* Save info about RSSI of last Rx */ | |
2740 | void rs_update_last_rssi(struct iwl_mvm *mvm, | |
2741 | struct iwl_lq_sta *lq_sta, | |
2742 | struct ieee80211_rx_status *rx_status) | |
2743 | { | |
b503ed60 ES |
2744 | int i; |
2745 | ||
361dbec8 ES |
2746 | lq_sta->pers.chains = rx_status->chains; |
2747 | lq_sta->pers.chain_signal[0] = rx_status->chain_signal[0]; | |
2748 | lq_sta->pers.chain_signal[1] = rx_status->chain_signal[1]; | |
2749 | lq_sta->pers.chain_signal[2] = rx_status->chain_signal[2]; | |
b503ed60 ES |
2750 | lq_sta->pers.last_rssi = S8_MIN; |
2751 | ||
2752 | for (i = 0; i < ARRAY_SIZE(lq_sta->pers.chain_signal); i++) { | |
2753 | if (!(lq_sta->pers.chains & BIT(i))) | |
2754 | continue; | |
2755 | ||
2756 | if (lq_sta->pers.chain_signal[i] > lq_sta->pers.last_rssi) | |
2757 | lq_sta->pers.last_rssi = lq_sta->pers.chain_signal[i]; | |
2758 | } | |
361dbec8 ES |
2759 | } |
2760 | ||
8ca151b5 JB |
2761 | /** |
2762 | * rs_initialize_lq - Initialize a station's hardware rate table | |
2763 | * | |
2764 | * The uCode's station table contains a table of fallback rates | |
2765 | * for automatic fallback during transmission. | |
2766 | * | |
2767 | * NOTE: This sets up a default set of values. These will be replaced later | |
2768 | * if the driver's iwl-agn-rs rate scaling algorithm is used, instead of | |
2769 | * rc80211_simple. | |
2770 | * | |
2771 | * NOTE: Run REPLY_ADD_STA command to set up station table entry, before | |
2772 | * calling this function (which runs REPLY_TX_LINK_QUALITY_CMD, | |
2773 | * which requires station table entry to exist). | |
2774 | */ | |
2775 | static void rs_initialize_lq(struct iwl_mvm *mvm, | |
2776 | struct ieee80211_sta *sta, | |
2777 | struct iwl_lq_sta *lq_sta, | |
b87c2179 ES |
2778 | enum ieee80211_band band, |
2779 | bool init) | |
8ca151b5 JB |
2780 | { |
2781 | struct iwl_scale_tbl_info *tbl; | |
5aa33553 | 2782 | struct rs_rate *rate; |
8ca151b5 | 2783 | u8 active_tbl = 0; |
8ca151b5 JB |
2784 | |
2785 | if (!sta || !lq_sta) | |
2786 | return; | |
2787 | ||
8ca151b5 JB |
2788 | if (!lq_sta->search_better_tbl) |
2789 | active_tbl = lq_sta->active_tbl; | |
2790 | else | |
2791 | active_tbl = 1 - lq_sta->active_tbl; | |
2792 | ||
2793 | tbl = &(lq_sta->lq_info[active_tbl]); | |
5aa33553 | 2794 | rate = &tbl->rate; |
8ca151b5 | 2795 | |
99319b8c | 2796 | rs_get_initial_rate(mvm, sta, lq_sta, band, rate); |
b503ed60 | 2797 | rs_init_optimal_rate(mvm, sta, lq_sta); |
8ca151b5 | 2798 | |
b3b06a32 | 2799 | WARN_ON_ONCE(rate->ant != ANT_A && rate->ant != ANT_B); |
99319b8c | 2800 | tbl->column = rs_get_column_from_rate(rate); |
b3b06a32 | 2801 | |
8ca151b5 | 2802 | rs_set_expected_tpt_table(lq_sta, tbl); |
80e9e5cd | 2803 | rs_fill_lq_cmd(mvm, sta, lq_sta, rate); |
8ca151b5 | 2804 | /* TODO restore station should remember the lq cmd */ |
b87c2179 | 2805 | iwl_mvm_send_lq_cmd(mvm, &lq_sta->lq, init); |
8ca151b5 JB |
2806 | } |
2807 | ||
2808 | static void rs_get_rate(void *mvm_r, struct ieee80211_sta *sta, void *mvm_sta, | |
2809 | struct ieee80211_tx_rate_control *txrc) | |
2810 | { | |
2811 | struct sk_buff *skb = txrc->skb; | |
8ca151b5 JB |
2812 | struct iwl_op_mode *op_mode __maybe_unused = |
2813 | (struct iwl_op_mode *)mvm_r; | |
2814 | struct iwl_mvm *mvm __maybe_unused = IWL_OP_MODE_GET_MVM(op_mode); | |
2815 | struct ieee80211_tx_info *info = IEEE80211_SKB_CB(skb); | |
2816 | struct iwl_lq_sta *lq_sta = mvm_sta; | |
b503ed60 ES |
2817 | struct rs_rate *optimal_rate; |
2818 | u32 last_ucode_rate; | |
8ca151b5 | 2819 | |
dcbc17ad JB |
2820 | if (sta && !iwl_mvm_sta_from_mac80211(sta)->vif) { |
2821 | /* if vif isn't initialized mvm doesn't know about | |
2822 | * this station, so don't do anything with the it | |
2823 | */ | |
2824 | sta = NULL; | |
2825 | mvm_sta = NULL; | |
2826 | } | |
2827 | ||
2536e7c3 | 2828 | /* TODO: handle rate_idx_mask and rate_idx_mcs_mask */ |
8ca151b5 JB |
2829 | |
2830 | /* Treat uninitialized rate scaling data same as non-existing. */ | |
ae969afe | 2831 | if (lq_sta && !lq_sta->pers.drv) { |
8ca151b5 JB |
2832 | IWL_DEBUG_RATE(mvm, "Rate scaling not initialized yet.\n"); |
2833 | mvm_sta = NULL; | |
2834 | } | |
2835 | ||
2836 | /* Send management frames and NO_ACK data using lowest rate. */ | |
2837 | if (rate_control_send_low(sta, mvm_sta, txrc)) | |
2838 | return; | |
2839 | ||
d310e405 ES |
2840 | iwl_mvm_hwrate_to_tx_rate(lq_sta->last_rate_n_flags, |
2841 | info->band, &info->control.rates[0]); | |
622ebe99 | 2842 | info->control.rates[0].count = 1; |
b503ed60 ES |
2843 | |
2844 | /* Report the optimal rate based on rssi and STA caps if we haven't | |
2845 | * converged yet (too little traffic) or exploring other modulations | |
2846 | */ | |
2847 | if (lq_sta->rs_state != RS_STATE_STAY_IN_COLUMN) { | |
2848 | optimal_rate = rs_get_optimal_rate(mvm, lq_sta); | |
2849 | last_ucode_rate = ucode_rate_from_rs_rate(mvm, | |
2850 | optimal_rate); | |
2851 | iwl_mvm_hwrate_to_tx_rate(last_ucode_rate, info->band, | |
2852 | &txrc->reported_rate); | |
2853 | } | |
8ca151b5 JB |
2854 | } |
2855 | ||
2856 | static void *rs_alloc_sta(void *mvm_rate, struct ieee80211_sta *sta, | |
2857 | gfp_t gfp) | |
2858 | { | |
9d8ce6af | 2859 | struct iwl_mvm_sta *sta_priv = iwl_mvm_sta_from_mac80211(sta); |
ae969afe EP |
2860 | struct iwl_op_mode *op_mode = (struct iwl_op_mode *)mvm_rate; |
2861 | struct iwl_mvm *mvm = IWL_OP_MODE_GET_MVM(op_mode); | |
2862 | struct iwl_lq_sta *lq_sta = &sta_priv->lq_sta; | |
8ca151b5 JB |
2863 | |
2864 | IWL_DEBUG_RATE(mvm, "create station rate scale window\n"); | |
2865 | ||
ae969afe EP |
2866 | lq_sta->pers.drv = mvm; |
2867 | #ifdef CONFIG_MAC80211_DEBUGFS | |
2868 | lq_sta->pers.dbg_fixed_rate = 0; | |
2869 | lq_sta->pers.dbg_fixed_txp_reduction = TPC_INVALID; | |
878985ce | 2870 | lq_sta->pers.ss_force = RS_SS_FORCE_NONE; |
ae969afe | 2871 | #endif |
361dbec8 ES |
2872 | lq_sta->pers.chains = 0; |
2873 | memset(lq_sta->pers.chain_signal, 0, sizeof(lq_sta->pers.chain_signal)); | |
b503ed60 | 2874 | lq_sta->pers.last_rssi = S8_MIN; |
ae969afe | 2875 | |
8ca151b5 JB |
2876 | return &sta_priv->lq_sta; |
2877 | } | |
2878 | ||
d310e405 ES |
2879 | static int rs_vht_highest_rx_mcs_index(struct ieee80211_sta_vht_cap *vht_cap, |
2880 | int nss) | |
2881 | { | |
2882 | u16 rx_mcs = le16_to_cpu(vht_cap->vht_mcs.rx_mcs_map) & | |
2883 | (0x3 << (2 * (nss - 1))); | |
2884 | rx_mcs >>= (2 * (nss - 1)); | |
2885 | ||
2886 | if (rx_mcs == IEEE80211_VHT_MCS_SUPPORT_0_7) | |
2887 | return IWL_RATE_MCS_7_INDEX; | |
2888 | else if (rx_mcs == IEEE80211_VHT_MCS_SUPPORT_0_8) | |
2889 | return IWL_RATE_MCS_8_INDEX; | |
2890 | else if (rx_mcs == IEEE80211_VHT_MCS_SUPPORT_0_9) | |
2891 | return IWL_RATE_MCS_9_INDEX; | |
2892 | ||
2893 | WARN_ON_ONCE(rx_mcs != IEEE80211_VHT_MCS_NOT_SUPPORTED); | |
2894 | return -1; | |
2895 | } | |
2896 | ||
750a1b45 ES |
2897 | static void rs_vht_set_enabled_rates(struct ieee80211_sta *sta, |
2898 | struct ieee80211_sta_vht_cap *vht_cap, | |
2899 | struct iwl_lq_sta *lq_sta) | |
2900 | { | |
2901 | int i; | |
2902 | int highest_mcs = rs_vht_highest_rx_mcs_index(vht_cap, 1); | |
2903 | ||
2904 | if (highest_mcs >= IWL_RATE_MCS_0_INDEX) { | |
2905 | for (i = IWL_RATE_MCS_0_INDEX; i <= highest_mcs; i++) { | |
2906 | if (i == IWL_RATE_9M_INDEX) | |
2907 | continue; | |
2908 | ||
271518ad ES |
2909 | /* VHT MCS9 isn't valid for 20Mhz for NSS=1,2 */ |
2910 | if (i == IWL_RATE_MCS_9_INDEX && | |
2911 | sta->bandwidth == IEEE80211_STA_RX_BW_20) | |
2912 | continue; | |
2913 | ||
750a1b45 ES |
2914 | lq_sta->active_siso_rate |= BIT(i); |
2915 | } | |
2916 | } | |
2917 | ||
ecc90e79 ES |
2918 | if (sta->rx_nss < 2) |
2919 | return; | |
2920 | ||
750a1b45 ES |
2921 | highest_mcs = rs_vht_highest_rx_mcs_index(vht_cap, 2); |
2922 | if (highest_mcs >= IWL_RATE_MCS_0_INDEX) { | |
2923 | for (i = IWL_RATE_MCS_0_INDEX; i <= highest_mcs; i++) { | |
2924 | if (i == IWL_RATE_9M_INDEX) | |
2925 | continue; | |
2926 | ||
271518ad ES |
2927 | /* VHT MCS9 isn't valid for 20Mhz for NSS=1,2 */ |
2928 | if (i == IWL_RATE_MCS_9_INDEX && | |
2929 | sta->bandwidth == IEEE80211_STA_RX_BW_20) | |
2930 | continue; | |
2931 | ||
750a1b45 ES |
2932 | lq_sta->active_mimo2_rate |= BIT(i); |
2933 | } | |
2934 | } | |
2935 | } | |
2936 | ||
2f15a829 JB |
2937 | static void rs_ht_init(struct iwl_mvm *mvm, |
2938 | struct ieee80211_sta *sta, | |
2939 | struct iwl_lq_sta *lq_sta, | |
2940 | struct ieee80211_sta_ht_cap *ht_cap) | |
2941 | { | |
2942 | /* active_siso_rate mask includes 9 MBits (bit 5), | |
2943 | * and CCK (bits 0-3), supp_rates[] does not; | |
2944 | * shift to convert format, force 9 MBits off. | |
2945 | */ | |
2946 | lq_sta->active_siso_rate = ht_cap->mcs.rx_mask[0] << 1; | |
2947 | lq_sta->active_siso_rate |= ht_cap->mcs.rx_mask[0] & 0x1; | |
2948 | lq_sta->active_siso_rate &= ~((u16)0x2); | |
2949 | lq_sta->active_siso_rate <<= IWL_FIRST_OFDM_RATE; | |
2950 | ||
2951 | lq_sta->active_mimo2_rate = ht_cap->mcs.rx_mask[1] << 1; | |
2952 | lq_sta->active_mimo2_rate |= ht_cap->mcs.rx_mask[1] & 0x1; | |
2953 | lq_sta->active_mimo2_rate &= ~((u16)0x2); | |
2954 | lq_sta->active_mimo2_rate <<= IWL_FIRST_OFDM_RATE; | |
2955 | ||
2956 | if (mvm->cfg->ht_params->ldpc && | |
2957 | (ht_cap->cap & IEEE80211_HT_CAP_LDPC_CODING)) | |
2958 | lq_sta->ldpc = true; | |
2959 | ||
2960 | if (mvm->cfg->ht_params->stbc && | |
2961 | (num_of_ant(iwl_mvm_get_valid_tx_ant(mvm)) > 1) && | |
2962 | (ht_cap->cap & IEEE80211_HT_CAP_RX_STBC)) | |
3d44eebf | 2963 | lq_sta->stbc_capable = true; |
2f15a829 JB |
2964 | |
2965 | lq_sta->is_vht = false; | |
2966 | } | |
2967 | ||
2968 | static void rs_vht_init(struct iwl_mvm *mvm, | |
2969 | struct ieee80211_sta *sta, | |
2970 | struct iwl_lq_sta *lq_sta, | |
2971 | struct ieee80211_sta_vht_cap *vht_cap) | |
2972 | { | |
2973 | rs_vht_set_enabled_rates(sta, vht_cap, lq_sta); | |
2974 | ||
2975 | if (mvm->cfg->ht_params->ldpc && | |
2976 | (vht_cap->cap & IEEE80211_VHT_CAP_RXLDPC)) | |
2977 | lq_sta->ldpc = true; | |
2978 | ||
2979 | if (mvm->cfg->ht_params->stbc && | |
2980 | (num_of_ant(iwl_mvm_get_valid_tx_ant(mvm)) > 1) && | |
2981 | (vht_cap->cap & IEEE80211_VHT_CAP_RXSTBC_MASK)) | |
3d44eebf ES |
2982 | lq_sta->stbc_capable = true; |
2983 | ||
859d914c | 2984 | if (fw_has_capa(&mvm->fw->ucode_capa, IWL_UCODE_TLV_CAPA_BEAMFORMER) && |
3d44eebf ES |
2985 | (num_of_ant(iwl_mvm_get_valid_tx_ant(mvm)) > 1) && |
2986 | (vht_cap->cap & IEEE80211_VHT_CAP_SU_BEAMFORMEE_CAPABLE)) | |
2987 | lq_sta->bfer_capable = true; | |
2f15a829 JB |
2988 | |
2989 | lq_sta->is_vht = true; | |
2990 | } | |
2991 | ||
5fc0f76c | 2992 | #ifdef CONFIG_IWLWIFI_DEBUGFS |
2f15a829 | 2993 | static void iwl_mvm_reset_frame_stats(struct iwl_mvm *mvm) |
5fc0f76c ES |
2994 | { |
2995 | spin_lock_bh(&mvm->drv_stats_lock); | |
2f15a829 | 2996 | memset(&mvm->drv_rx_stats, 0, sizeof(mvm->drv_rx_stats)); |
5fc0f76c ES |
2997 | spin_unlock_bh(&mvm->drv_stats_lock); |
2998 | } | |
2999 | ||
2f15a829 | 3000 | void iwl_mvm_update_frame_stats(struct iwl_mvm *mvm, u32 rate, bool agg) |
5fc0f76c ES |
3001 | { |
3002 | u8 nss = 0, mcs = 0; | |
3003 | ||
3004 | spin_lock(&mvm->drv_stats_lock); | |
3005 | ||
3006 | if (agg) | |
2f15a829 | 3007 | mvm->drv_rx_stats.agg_frames++; |
5fc0f76c | 3008 | |
2f15a829 | 3009 | mvm->drv_rx_stats.success_frames++; |
5fc0f76c ES |
3010 | |
3011 | switch (rate & RATE_MCS_CHAN_WIDTH_MSK) { | |
3012 | case RATE_MCS_CHAN_WIDTH_20: | |
2f15a829 | 3013 | mvm->drv_rx_stats.bw_20_frames++; |
5fc0f76c ES |
3014 | break; |
3015 | case RATE_MCS_CHAN_WIDTH_40: | |
2f15a829 | 3016 | mvm->drv_rx_stats.bw_40_frames++; |
5fc0f76c ES |
3017 | break; |
3018 | case RATE_MCS_CHAN_WIDTH_80: | |
2f15a829 | 3019 | mvm->drv_rx_stats.bw_80_frames++; |
5fc0f76c ES |
3020 | break; |
3021 | default: | |
3022 | WARN_ONCE(1, "bad BW. rate 0x%x", rate); | |
3023 | } | |
3024 | ||
3025 | if (rate & RATE_MCS_HT_MSK) { | |
2f15a829 | 3026 | mvm->drv_rx_stats.ht_frames++; |
5fc0f76c ES |
3027 | mcs = rate & RATE_HT_MCS_RATE_CODE_MSK; |
3028 | nss = ((rate & RATE_HT_MCS_NSS_MSK) >> RATE_HT_MCS_NSS_POS) + 1; | |
3029 | } else if (rate & RATE_MCS_VHT_MSK) { | |
2f15a829 | 3030 | mvm->drv_rx_stats.vht_frames++; |
5fc0f76c ES |
3031 | mcs = rate & RATE_VHT_MCS_RATE_CODE_MSK; |
3032 | nss = ((rate & RATE_VHT_MCS_NSS_MSK) >> | |
3033 | RATE_VHT_MCS_NSS_POS) + 1; | |
3034 | } else { | |
2f15a829 | 3035 | mvm->drv_rx_stats.legacy_frames++; |
5fc0f76c ES |
3036 | } |
3037 | ||
3038 | if (nss == 1) | |
2f15a829 | 3039 | mvm->drv_rx_stats.siso_frames++; |
5fc0f76c | 3040 | else if (nss == 2) |
2f15a829 | 3041 | mvm->drv_rx_stats.mimo2_frames++; |
5fc0f76c ES |
3042 | |
3043 | if (rate & RATE_MCS_SGI_MSK) | |
2f15a829 | 3044 | mvm->drv_rx_stats.sgi_frames++; |
5fc0f76c | 3045 | else |
2f15a829 | 3046 | mvm->drv_rx_stats.ngi_frames++; |
5fc0f76c | 3047 | |
2f15a829 JB |
3048 | mvm->drv_rx_stats.last_rates[mvm->drv_rx_stats.last_frame_idx] = rate; |
3049 | mvm->drv_rx_stats.last_frame_idx = | |
3050 | (mvm->drv_rx_stats.last_frame_idx + 1) % | |
3051 | ARRAY_SIZE(mvm->drv_rx_stats.last_rates); | |
5fc0f76c ES |
3052 | |
3053 | spin_unlock(&mvm->drv_stats_lock); | |
3054 | } | |
3055 | #endif | |
3056 | ||
8ca151b5 JB |
3057 | /* |
3058 | * Called after adding a new station to initialize rate scaling | |
3059 | */ | |
3060 | void iwl_mvm_rs_rate_init(struct iwl_mvm *mvm, struct ieee80211_sta *sta, | |
b87c2179 | 3061 | enum ieee80211_band band, bool init) |
8ca151b5 JB |
3062 | { |
3063 | int i, j; | |
3064 | struct ieee80211_hw *hw = mvm->hw; | |
3065 | struct ieee80211_sta_ht_cap *ht_cap = &sta->ht_cap; | |
d310e405 | 3066 | struct ieee80211_sta_vht_cap *vht_cap = &sta->vht_cap; |
9d8ce6af JB |
3067 | struct iwl_mvm_sta *sta_priv = iwl_mvm_sta_from_mac80211(sta); |
3068 | struct iwl_lq_sta *lq_sta = &sta_priv->lq_sta; | |
8ca151b5 JB |
3069 | struct ieee80211_supported_band *sband; |
3070 | unsigned long supp; /* must be unsigned long for for_each_set_bit */ | |
3071 | ||
ae969afe EP |
3072 | /* clear all non-persistent lq data */ |
3073 | memset(lq_sta, 0, offsetof(typeof(*lq_sta), pers)); | |
b87c2179 | 3074 | |
8ca151b5 JB |
3075 | sband = hw->wiphy->bands[band]; |
3076 | ||
3077 | lq_sta->lq.sta_id = sta_priv->sta_id; | |
3078 | ||
3079 | for (j = 0; j < LQ_SIZE; j++) | |
b804eeb6 | 3080 | rs_rate_scale_clear_tbl_windows(mvm, &lq_sta->lq_info[j]); |
8ca151b5 JB |
3081 | |
3082 | lq_sta->flush_timer = 0; | |
87d5e415 | 3083 | lq_sta->last_tx = jiffies; |
8ca151b5 JB |
3084 | |
3085 | IWL_DEBUG_RATE(mvm, | |
3086 | "LQ: *** rate scale station global init for station %d ***\n", | |
3087 | sta_priv->sta_id); | |
3088 | /* TODO: what is a good starting rate for STA? About middle? Maybe not | |
3089 | * the lowest or the highest rate.. Could consider using RSSI from | |
3090 | * previous packets? Need to have IEEE 802.1X auth succeed immediately | |
3091 | * after assoc.. */ | |
3092 | ||
834437da | 3093 | lq_sta->missed_rate_counter = IWL_MVM_RS_MISSED_RATE_MAX; |
8ca151b5 JB |
3094 | lq_sta->band = sband->band; |
3095 | /* | |
3096 | * active legacy rates as per supported rates bitmap | |
3097 | */ | |
3098 | supp = sta->supp_rates[sband->band]; | |
3099 | lq_sta->active_legacy_rate = 0; | |
3100 | for_each_set_bit(i, &supp, BITS_PER_LONG) | |
3101 | lq_sta->active_legacy_rate |= BIT(sband->bitrates[i].hw_value); | |
3102 | ||
d310e405 | 3103 | /* TODO: should probably account for rx_highest for both HT/VHT */ |
2c59d80c ES |
3104 | if (!vht_cap || !vht_cap->vht_supported) |
3105 | rs_ht_init(mvm, sta, lq_sta, ht_cap); | |
3106 | else | |
3107 | rs_vht_init(mvm, sta, lq_sta, vht_cap); | |
8ca151b5 | 3108 | |
6a028d9a ES |
3109 | lq_sta->max_legacy_rate_idx = |
3110 | rs_get_max_rate_from_mask(lq_sta->active_legacy_rate); | |
3111 | lq_sta->max_siso_rate_idx = | |
3112 | rs_get_max_rate_from_mask(lq_sta->active_siso_rate); | |
3113 | lq_sta->max_mimo2_rate_idx = | |
3114 | rs_get_max_rate_from_mask(lq_sta->active_mimo2_rate); | |
198266a3 | 3115 | |
a3576ff2 | 3116 | IWL_DEBUG_RATE(mvm, |
3d44eebf | 3117 | "LEGACY=%lX SISO=%lX MIMO2=%lX VHT=%d LDPC=%d STBC=%d BFER=%d\n", |
198266a3 | 3118 | lq_sta->active_legacy_rate, |
8ca151b5 | 3119 | lq_sta->active_siso_rate, |
d310e405 | 3120 | lq_sta->active_mimo2_rate, |
3d44eebf ES |
3121 | lq_sta->is_vht, lq_sta->ldpc, lq_sta->stbc_capable, |
3122 | lq_sta->bfer_capable); | |
198266a3 ES |
3123 | IWL_DEBUG_RATE(mvm, "MAX RATE: LEGACY=%d SISO=%d MIMO2=%d\n", |
3124 | lq_sta->max_legacy_rate_idx, | |
3125 | lq_sta->max_siso_rate_idx, | |
3126 | lq_sta->max_mimo2_rate_idx); | |
8ca151b5 JB |
3127 | |
3128 | /* These values will be overridden later */ | |
3129 | lq_sta->lq.single_stream_ant_msk = | |
a0544272 | 3130 | first_antenna(iwl_mvm_get_valid_tx_ant(mvm)); |
809bccfa | 3131 | lq_sta->lq.dual_stream_ant_msk = ANT_AB; |
8ca151b5 JB |
3132 | |
3133 | /* as default allow aggregation for all tids */ | |
3134 | lq_sta->tx_agg_tid_en = IWL_AGG_ALL_TID; | |
8ca151b5 | 3135 | lq_sta->is_agg = 0; |
5fc0f76c | 3136 | #ifdef CONFIG_IWLWIFI_DEBUGFS |
2f15a829 | 3137 | iwl_mvm_reset_frame_stats(mvm); |
5fc0f76c | 3138 | #endif |
b87c2179 ES |
3139 | rs_initialize_lq(mvm, sta, lq_sta, band, init); |
3140 | } | |
3141 | ||
3142 | static void rs_rate_update(void *mvm_r, | |
3143 | struct ieee80211_supported_band *sband, | |
3144 | struct cfg80211_chan_def *chandef, | |
3145 | struct ieee80211_sta *sta, void *priv_sta, | |
3146 | u32 changed) | |
3147 | { | |
3148 | u8 tid; | |
3149 | struct iwl_op_mode *op_mode = | |
3150 | (struct iwl_op_mode *)mvm_r; | |
3151 | struct iwl_mvm *mvm = IWL_OP_MODE_GET_MVM(op_mode); | |
3152 | ||
dcbc17ad JB |
3153 | if (!iwl_mvm_sta_from_mac80211(sta)->vif) |
3154 | return; | |
3155 | ||
b87c2179 ES |
3156 | /* Stop any ongoing aggregations as rs starts off assuming no agg */ |
3157 | for (tid = 0; tid < IWL_MAX_TID_COUNT; tid++) | |
3158 | ieee80211_stop_tx_ba_session(sta, tid); | |
3159 | ||
3160 | iwl_mvm_rs_rate_init(mvm, sta, sband->band, false); | |
8ca151b5 JB |
3161 | } |
3162 | ||
8fc7c58c ES |
3163 | #ifdef CONFIG_MAC80211_DEBUGFS |
3164 | static void rs_build_rates_table_from_fixed(struct iwl_mvm *mvm, | |
3165 | struct iwl_lq_cmd *lq_cmd, | |
3166 | enum ieee80211_band band, | |
3167 | u32 ucode_rate) | |
3168 | { | |
3169 | struct rs_rate rate; | |
3170 | int i; | |
3171 | int num_rates = ARRAY_SIZE(lq_cmd->rs_table); | |
3172 | __le32 ucode_rate_le32 = cpu_to_le32(ucode_rate); | |
7ceb98a3 | 3173 | u8 ant = (ucode_rate & RATE_MCS_ANT_ABC_MSK) >> RATE_MCS_ANT_POS; |
8fc7c58c ES |
3174 | |
3175 | for (i = 0; i < num_rates; i++) | |
3176 | lq_cmd->rs_table[i] = ucode_rate_le32; | |
3177 | ||
3178 | rs_rate_from_ucode_rate(ucode_rate, band, &rate); | |
3179 | ||
3180 | if (is_mimo(&rate)) | |
3181 | lq_cmd->mimo_delim = num_rates - 1; | |
3182 | else | |
3183 | lq_cmd->mimo_delim = 0; | |
7ceb98a3 EG |
3184 | |
3185 | lq_cmd->reduced_tpc = 0; | |
3186 | ||
3187 | if (num_of_ant(ant) == 1) | |
3188 | lq_cmd->single_stream_ant_msk = ant; | |
3189 | ||
3190 | lq_cmd->agg_frame_cnt_limit = LINK_QUAL_AGG_FRAME_LIMIT_DEF; | |
8fc7c58c ES |
3191 | } |
3192 | #endif /* CONFIG_MAC80211_DEBUGFS */ | |
3193 | ||
e07be6d3 ES |
3194 | static void rs_fill_rates_for_column(struct iwl_mvm *mvm, |
3195 | struct iwl_lq_sta *lq_sta, | |
3196 | struct rs_rate *rate, | |
3197 | __le32 *rs_table, int *rs_table_index, | |
3198 | int num_rates, int num_retries, | |
3199 | u8 valid_tx_ant, bool toggle_ant) | |
3200 | { | |
3201 | int i, j; | |
3202 | __le32 ucode_rate; | |
3203 | bool bottom_reached = false; | |
3204 | int prev_rate_idx = rate->index; | |
3205 | int end = LINK_QUAL_MAX_RETRY_NUM; | |
3206 | int index = *rs_table_index; | |
3207 | ||
3208 | for (i = 0; i < num_rates && index < end; i++) { | |
bd999318 ES |
3209 | for (j = 0; j < num_retries && index < end; j++, index++) { |
3210 | ucode_rate = cpu_to_le32(ucode_rate_from_rs_rate(mvm, | |
3211 | rate)); | |
e07be6d3 | 3212 | rs_table[index] = ucode_rate; |
bd999318 ES |
3213 | if (toggle_ant) |
3214 | rs_toggle_antenna(valid_tx_ant, rate); | |
3215 | } | |
e07be6d3 ES |
3216 | |
3217 | prev_rate_idx = rate->index; | |
3218 | bottom_reached = rs_get_lower_rate_in_column(lq_sta, rate); | |
3219 | if (bottom_reached && !is_legacy(rate)) | |
3220 | break; | |
3221 | } | |
3222 | ||
bd999318 | 3223 | if (!bottom_reached && !is_legacy(rate)) |
e07be6d3 ES |
3224 | rate->index = prev_rate_idx; |
3225 | ||
3226 | *rs_table_index = index; | |
3227 | } | |
3228 | ||
3229 | /* Building the rate table is non trivial. When we're in MIMO2/VHT/80Mhz/SGI | |
3230 | * column the rate table should look like this: | |
3231 | * | |
3232 | * rate[0] 0x400D019 VHT | ANT: AB BW: 80Mhz MCS: 9 NSS: 2 SGI | |
3233 | * rate[1] 0x400D019 VHT | ANT: AB BW: 80Mhz MCS: 9 NSS: 2 SGI | |
3234 | * rate[2] 0x400D018 VHT | ANT: AB BW: 80Mhz MCS: 8 NSS: 2 SGI | |
3235 | * rate[3] 0x400D018 VHT | ANT: AB BW: 80Mhz MCS: 8 NSS: 2 SGI | |
3236 | * rate[4] 0x400D017 VHT | ANT: AB BW: 80Mhz MCS: 7 NSS: 2 SGI | |
3237 | * rate[5] 0x400D017 VHT | ANT: AB BW: 80Mhz MCS: 7 NSS: 2 SGI | |
3238 | * rate[6] 0x4005007 VHT | ANT: A BW: 80Mhz MCS: 7 NSS: 1 NGI | |
3239 | * rate[7] 0x4009006 VHT | ANT: B BW: 80Mhz MCS: 6 NSS: 1 NGI | |
3240 | * rate[8] 0x4005005 VHT | ANT: A BW: 80Mhz MCS: 5 NSS: 1 NGI | |
3241 | * rate[9] 0x800B Legacy | ANT: B Rate: 36 Mbps | |
3242 | * rate[10] 0x4009 Legacy | ANT: A Rate: 24 Mbps | |
3243 | * rate[11] 0x8007 Legacy | ANT: B Rate: 18 Mbps | |
3244 | * rate[12] 0x4005 Legacy | ANT: A Rate: 12 Mbps | |
3245 | * rate[13] 0x800F Legacy | ANT: B Rate: 9 Mbps | |
3246 | * rate[14] 0x400D Legacy | ANT: A Rate: 6 Mbps | |
3247 | * rate[15] 0x800D Legacy | ANT: B Rate: 6 Mbps | |
3248 | */ | |
8fc7c58c | 3249 | static void rs_build_rates_table(struct iwl_mvm *mvm, |
d8bafeaf | 3250 | struct ieee80211_sta *sta, |
8fc7c58c ES |
3251 | struct iwl_lq_sta *lq_sta, |
3252 | const struct rs_rate *initial_rate) | |
8ca151b5 | 3253 | { |
5aa33553 | 3254 | struct rs_rate rate; |
e07be6d3 | 3255 | int num_rates, num_retries, index = 0; |
8ca151b5 JB |
3256 | u8 valid_tx_ant = 0; |
3257 | struct iwl_lq_cmd *lq_cmd = &lq_sta->lq; | |
e07be6d3 | 3258 | bool toggle_ant = false; |
8ca151b5 | 3259 | |
9e898f1b | 3260 | memcpy(&rate, initial_rate, sizeof(rate)); |
8fc7c58c | 3261 | |
a0544272 | 3262 | valid_tx_ant = iwl_mvm_get_valid_tx_ant(mvm); |
c5d679a5 | 3263 | |
3d44eebf | 3264 | /* TODO: remove old API when min FW API hits 14 */ |
859d914c | 3265 | if (!fw_has_api(&mvm->fw->ucode_capa, IWL_UCODE_TLV_API_LQ_SS_PARAMS) && |
3d44eebf ES |
3266 | rs_stbc_allow(mvm, sta, lq_sta)) |
3267 | rate.stbc = true; | |
8ca151b5 | 3268 | |
e07be6d3 | 3269 | if (is_siso(&rate)) { |
834437da ES |
3270 | num_rates = IWL_MVM_RS_INITIAL_SISO_NUM_RATES; |
3271 | num_retries = IWL_MVM_RS_HT_VHT_RETRIES_PER_RATE; | |
e07be6d3 | 3272 | } else if (is_mimo(&rate)) { |
834437da ES |
3273 | num_rates = IWL_MVM_RS_INITIAL_MIMO_NUM_RATES; |
3274 | num_retries = IWL_MVM_RS_HT_VHT_RETRIES_PER_RATE; | |
8ca151b5 | 3275 | } else { |
834437da | 3276 | num_rates = IWL_MVM_RS_INITIAL_LEGACY_NUM_RATES; |
bd999318 | 3277 | num_retries = IWL_MVM_RS_INITIAL_LEGACY_RETRIES; |
e07be6d3 | 3278 | toggle_ant = true; |
8ca151b5 JB |
3279 | } |
3280 | ||
e07be6d3 ES |
3281 | rs_fill_rates_for_column(mvm, lq_sta, &rate, lq_cmd->rs_table, &index, |
3282 | num_rates, num_retries, valid_tx_ant, | |
3283 | toggle_ant); | |
8ca151b5 | 3284 | |
e07be6d3 | 3285 | rs_get_lower_rate_down_column(lq_sta, &rate); |
8ca151b5 | 3286 | |
e07be6d3 | 3287 | if (is_siso(&rate)) { |
834437da ES |
3288 | num_rates = IWL_MVM_RS_SECONDARY_SISO_NUM_RATES; |
3289 | num_retries = IWL_MVM_RS_SECONDARY_SISO_RETRIES; | |
d9088f60 | 3290 | lq_cmd->mimo_delim = index; |
e07be6d3 | 3291 | } else if (is_legacy(&rate)) { |
834437da | 3292 | num_rates = IWL_MVM_RS_SECONDARY_LEGACY_NUM_RATES; |
bd999318 | 3293 | num_retries = IWL_MVM_RS_SECONDARY_LEGACY_RETRIES; |
e07be6d3 ES |
3294 | } else { |
3295 | WARN_ON_ONCE(1); | |
3296 | } | |
8ca151b5 | 3297 | |
e07be6d3 | 3298 | toggle_ant = true; |
8ca151b5 | 3299 | |
e07be6d3 ES |
3300 | rs_fill_rates_for_column(mvm, lq_sta, &rate, lq_cmd->rs_table, &index, |
3301 | num_rates, num_retries, valid_tx_ant, | |
3302 | toggle_ant); | |
8ca151b5 | 3303 | |
e07be6d3 | 3304 | rs_get_lower_rate_down_column(lq_sta, &rate); |
8ca151b5 | 3305 | |
834437da | 3306 | num_rates = IWL_MVM_RS_SECONDARY_LEGACY_NUM_RATES; |
bd999318 | 3307 | num_retries = IWL_MVM_RS_SECONDARY_LEGACY_RETRIES; |
8ca151b5 | 3308 | |
e07be6d3 ES |
3309 | rs_fill_rates_for_column(mvm, lq_sta, &rate, lq_cmd->rs_table, &index, |
3310 | num_rates, num_retries, valid_tx_ant, | |
3311 | toggle_ant); | |
8ca151b5 | 3312 | |
8fc7c58c ES |
3313 | } |
3314 | ||
3d44eebf ES |
3315 | struct rs_bfer_active_iter_data { |
3316 | struct ieee80211_sta *exclude_sta; | |
3317 | struct iwl_mvm_sta *bfer_mvmsta; | |
3318 | }; | |
3319 | ||
3320 | static void rs_bfer_active_iter(void *_data, | |
3321 | struct ieee80211_sta *sta) | |
3322 | { | |
3323 | struct rs_bfer_active_iter_data *data = _data; | |
3324 | struct iwl_mvm_sta *mvmsta = iwl_mvm_sta_from_mac80211(sta); | |
3325 | struct iwl_lq_cmd *lq_cmd = &mvmsta->lq_sta.lq; | |
3326 | u32 ss_params = le32_to_cpu(lq_cmd->ss_params); | |
3327 | ||
3328 | if (sta == data->exclude_sta) | |
3329 | return; | |
3330 | ||
3331 | /* The current sta has BFER allowed */ | |
3332 | if (ss_params & LQ_SS_BFER_ALLOWED) { | |
3333 | WARN_ON_ONCE(data->bfer_mvmsta != NULL); | |
3334 | ||
3335 | data->bfer_mvmsta = mvmsta; | |
3336 | } | |
3337 | } | |
3338 | ||
3339 | static int rs_bfer_priority(struct iwl_mvm_sta *sta) | |
3340 | { | |
3341 | int prio = -1; | |
3342 | enum nl80211_iftype viftype = ieee80211_vif_type_p2p(sta->vif); | |
3343 | ||
3344 | switch (viftype) { | |
3345 | case NL80211_IFTYPE_AP: | |
3346 | case NL80211_IFTYPE_P2P_GO: | |
3347 | prio = 3; | |
3348 | break; | |
3349 | case NL80211_IFTYPE_P2P_CLIENT: | |
3350 | prio = 2; | |
3351 | break; | |
3352 | case NL80211_IFTYPE_STATION: | |
3353 | prio = 1; | |
3354 | break; | |
3355 | default: | |
3356 | WARN_ONCE(true, "viftype %d sta_id %d", viftype, sta->sta_id); | |
3357 | prio = -1; | |
3358 | } | |
3359 | ||
3360 | return prio; | |
3361 | } | |
3362 | ||
3363 | /* Returns >0 if sta1 has a higher BFER priority compared to sta2 */ | |
3364 | static int rs_bfer_priority_cmp(struct iwl_mvm_sta *sta1, | |
3365 | struct iwl_mvm_sta *sta2) | |
3366 | { | |
3367 | int prio1 = rs_bfer_priority(sta1); | |
3368 | int prio2 = rs_bfer_priority(sta2); | |
3369 | ||
3370 | if (prio1 > prio2) | |
3371 | return 1; | |
3372 | if (prio1 < prio2) | |
3373 | return -1; | |
3374 | return 0; | |
3375 | } | |
3376 | ||
3377 | static void rs_set_lq_ss_params(struct iwl_mvm *mvm, | |
3378 | struct ieee80211_sta *sta, | |
3379 | struct iwl_lq_sta *lq_sta, | |
3380 | const struct rs_rate *initial_rate) | |
3381 | { | |
3382 | struct iwl_lq_cmd *lq_cmd = &lq_sta->lq; | |
3383 | struct iwl_mvm_sta *mvmsta = iwl_mvm_sta_from_mac80211(sta); | |
3384 | struct rs_bfer_active_iter_data data = { | |
3385 | .exclude_sta = sta, | |
3386 | .bfer_mvmsta = NULL, | |
3387 | }; | |
3388 | struct iwl_mvm_sta *bfer_mvmsta = NULL; | |
3389 | u32 ss_params = LQ_SS_PARAMS_VALID; | |
3390 | ||
3391 | if (!iwl_mvm_bt_coex_is_mimo_allowed(mvm, sta)) | |
3392 | goto out; | |
3393 | ||
878985ce | 3394 | #ifdef CONFIG_MAC80211_DEBUGFS |
1e9c62fa ES |
3395 | /* Check if forcing the decision is configured. |
3396 | * Note that SISO is forced by not allowing STBC or BFER | |
3397 | */ | |
878985ce | 3398 | if (lq_sta->pers.ss_force == RS_SS_FORCE_STBC) |
1e9c62fa | 3399 | ss_params |= (LQ_SS_STBC_1SS_ALLOWED | LQ_SS_FORCE); |
878985ce | 3400 | else if (lq_sta->pers.ss_force == RS_SS_FORCE_BFER) |
1e9c62fa ES |
3401 | ss_params |= (LQ_SS_BFER_ALLOWED | LQ_SS_FORCE); |
3402 | ||
878985ce | 3403 | if (lq_sta->pers.ss_force != RS_SS_FORCE_NONE) { |
1e9c62fa | 3404 | IWL_DEBUG_RATE(mvm, "Forcing single stream Tx decision %d\n", |
878985ce | 3405 | lq_sta->pers.ss_force); |
1e9c62fa ES |
3406 | goto out; |
3407 | } | |
878985ce | 3408 | #endif |
1e9c62fa | 3409 | |
3d44eebf ES |
3410 | if (lq_sta->stbc_capable) |
3411 | ss_params |= LQ_SS_STBC_1SS_ALLOWED; | |
3412 | ||
3413 | if (!lq_sta->bfer_capable) | |
3414 | goto out; | |
3415 | ||
3416 | ieee80211_iterate_stations_atomic(mvm->hw, | |
3417 | rs_bfer_active_iter, | |
3418 | &data); | |
3419 | bfer_mvmsta = data.bfer_mvmsta; | |
3420 | ||
3421 | /* This code is safe as it doesn't run concurrently for different | |
3422 | * stations. This is guaranteed by the fact that calls to | |
3423 | * ieee80211_tx_status wouldn't run concurrently for a single HW. | |
3424 | */ | |
3425 | if (!bfer_mvmsta) { | |
3426 | IWL_DEBUG_RATE(mvm, "No sta with BFER allowed found. Allow\n"); | |
3427 | ||
3428 | ss_params |= LQ_SS_BFER_ALLOWED; | |
3429 | goto out; | |
3430 | } | |
3431 | ||
3432 | IWL_DEBUG_RATE(mvm, "Found existing sta %d with BFER activated\n", | |
3433 | bfer_mvmsta->sta_id); | |
3434 | ||
3435 | /* Disallow BFER on another STA if active and we're a higher priority */ | |
3436 | if (rs_bfer_priority_cmp(mvmsta, bfer_mvmsta) > 0) { | |
3437 | struct iwl_lq_cmd *bfersta_lq_cmd = &bfer_mvmsta->lq_sta.lq; | |
3438 | u32 bfersta_ss_params = le32_to_cpu(bfersta_lq_cmd->ss_params); | |
3439 | ||
3440 | bfersta_ss_params &= ~LQ_SS_BFER_ALLOWED; | |
3441 | bfersta_lq_cmd->ss_params = cpu_to_le32(bfersta_ss_params); | |
3442 | iwl_mvm_send_lq_cmd(mvm, bfersta_lq_cmd, false); | |
3443 | ||
3444 | ss_params |= LQ_SS_BFER_ALLOWED; | |
3445 | IWL_DEBUG_RATE(mvm, | |
3446 | "Lower priority BFER sta found (%d). Switch BFER\n", | |
3447 | bfer_mvmsta->sta_id); | |
3448 | } | |
3449 | out: | |
3450 | lq_cmd->ss_params = cpu_to_le32(ss_params); | |
3451 | } | |
3452 | ||
8fc7c58c ES |
3453 | static void rs_fill_lq_cmd(struct iwl_mvm *mvm, |
3454 | struct ieee80211_sta *sta, | |
3455 | struct iwl_lq_sta *lq_sta, | |
3456 | const struct rs_rate *initial_rate) | |
3457 | { | |
3458 | struct iwl_lq_cmd *lq_cmd = &lq_sta->lq; | |
7ceb98a3 EG |
3459 | struct iwl_mvm_sta *mvmsta; |
3460 | struct iwl_mvm_vif *mvmvif; | |
3461 | ||
834437da | 3462 | lq_cmd->agg_disable_start_th = IWL_MVM_RS_AGG_DISABLE_START; |
7ceb98a3 | 3463 | lq_cmd->agg_time_limit = |
834437da | 3464 | cpu_to_le16(IWL_MVM_RS_AGG_TIME_LIMIT); |
8fc7c58c ES |
3465 | |
3466 | #ifdef CONFIG_MAC80211_DEBUGFS | |
ae969afe | 3467 | if (lq_sta->pers.dbg_fixed_rate) { |
8fc7c58c ES |
3468 | rs_build_rates_table_from_fixed(mvm, lq_cmd, |
3469 | lq_sta->band, | |
ae969afe | 3470 | lq_sta->pers.dbg_fixed_rate); |
7ceb98a3 EG |
3471 | return; |
3472 | } | |
8fc7c58c | 3473 | #endif |
7ceb98a3 EG |
3474 | if (WARN_ON_ONCE(!sta || !initial_rate)) |
3475 | return; | |
8fc7c58c | 3476 | |
d8bafeaf | 3477 | rs_build_rates_table(mvm, sta, lq_sta, initial_rate); |
8ca151b5 | 3478 | |
859d914c | 3479 | if (fw_has_api(&mvm->fw->ucode_capa, IWL_UCODE_TLV_API_LQ_SS_PARAMS)) |
3d44eebf ES |
3480 | rs_set_lq_ss_params(mvm, sta, lq_sta, initial_rate); |
3481 | ||
7ceb98a3 EG |
3482 | mvmsta = iwl_mvm_sta_from_mac80211(sta); |
3483 | mvmvif = iwl_mvm_vif_from_mac80211(mvmsta->vif); | |
e96d551f | 3484 | |
7ceb98a3 EG |
3485 | if (num_of_ant(initial_rate->ant) == 1) |
3486 | lq_cmd->single_stream_ant_msk = initial_rate->ant; | |
3487 | ||
3488 | lq_cmd->agg_frame_cnt_limit = mvmsta->max_agg_bufsize; | |
3489 | ||
3490 | /* | |
0d365ae5 | 3491 | * In case of low latency, tell the firmware to leave a frame in the |
7ceb98a3 EG |
3492 | * Tx Fifo so that it can start a transaction in the same TxOP. This |
3493 | * basically allows the firmware to send bursts. | |
3494 | */ | |
1412ee39 | 3495 | if (iwl_mvm_vif_low_latency(mvmvif)) |
7ceb98a3 EG |
3496 | lq_cmd->agg_frame_cnt_limit--; |
3497 | ||
a4db848f EG |
3498 | if (mvmsta->vif->p2p) |
3499 | lq_cmd->flags |= LQ_FLAG_USE_RTS_MSK; | |
3500 | ||
7ceb98a3 | 3501 | lq_cmd->agg_time_limit = |
5b7ff615 | 3502 | cpu_to_le16(iwl_mvm_coex_agg_time_limit(mvm, sta)); |
8ca151b5 JB |
3503 | } |
3504 | ||
3505 | static void *rs_alloc(struct ieee80211_hw *hw, struct dentry *debugfsdir) | |
3506 | { | |
3507 | return hw->priv; | |
3508 | } | |
3509 | /* rate scale requires free function to be implemented */ | |
3510 | static void rs_free(void *mvm_rate) | |
3511 | { | |
3512 | return; | |
3513 | } | |
3514 | ||
3515 | static void rs_free_sta(void *mvm_r, struct ieee80211_sta *sta, | |
3516 | void *mvm_sta) | |
3517 | { | |
3518 | struct iwl_op_mode *op_mode __maybe_unused = mvm_r; | |
3519 | struct iwl_mvm *mvm __maybe_unused = IWL_OP_MODE_GET_MVM(op_mode); | |
3520 | ||
3521 | IWL_DEBUG_RATE(mvm, "enter\n"); | |
3522 | IWL_DEBUG_RATE(mvm, "leave\n"); | |
3523 | } | |
3524 | ||
3525 | #ifdef CONFIG_MAC80211_DEBUGFS | |
5fc0f76c | 3526 | int rs_pretty_print_rate(char *buf, const u32 rate) |
5aa33553 ES |
3527 | { |
3528 | ||
1a61b347 ES |
3529 | char *type, *bw; |
3530 | u8 mcs = 0, nss = 0; | |
3531 | u8 ant = (rate & RATE_MCS_ANT_ABC_MSK) >> RATE_MCS_ANT_POS; | |
3532 | ||
3533 | if (!(rate & RATE_MCS_HT_MSK) && | |
3534 | !(rate & RATE_MCS_VHT_MSK)) { | |
3535 | int index = iwl_hwrate_to_plcp_idx(rate); | |
3536 | ||
3537 | return sprintf(buf, "Legacy | ANT: %s Rate: %s Mbps\n", | |
560843f4 ES |
3538 | rs_pretty_ant(ant), |
3539 | index == IWL_RATE_INVALID ? "BAD" : | |
3540 | iwl_rate_mcs[index].mbps); | |
1a61b347 ES |
3541 | } |
3542 | ||
3543 | if (rate & RATE_MCS_VHT_MSK) { | |
3544 | type = "VHT"; | |
3545 | mcs = rate & RATE_VHT_MCS_RATE_CODE_MSK; | |
3546 | nss = ((rate & RATE_VHT_MCS_NSS_MSK) | |
3547 | >> RATE_VHT_MCS_NSS_POS) + 1; | |
3548 | } else if (rate & RATE_MCS_HT_MSK) { | |
3549 | type = "HT"; | |
3550 | mcs = rate & RATE_HT_MCS_INDEX_MSK; | |
3551 | } else { | |
3552 | type = "Unknown"; /* shouldn't happen */ | |
3553 | } | |
3554 | ||
3555 | switch (rate & RATE_MCS_CHAN_WIDTH_MSK) { | |
3556 | case RATE_MCS_CHAN_WIDTH_20: | |
3557 | bw = "20Mhz"; | |
3558 | break; | |
3559 | case RATE_MCS_CHAN_WIDTH_40: | |
3560 | bw = "40Mhz"; | |
3561 | break; | |
3562 | case RATE_MCS_CHAN_WIDTH_80: | |
3563 | bw = "80Mhz"; | |
3564 | break; | |
3565 | case RATE_MCS_CHAN_WIDTH_160: | |
3566 | bw = "160Mhz"; | |
3567 | break; | |
3568 | default: | |
3569 | bw = "BAD BW"; | |
3570 | } | |
3571 | ||
3572 | return sprintf(buf, "%s | ANT: %s BW: %s MCS: %d NSS: %d %s%s%s%s%s\n", | |
5aa33553 | 3573 | type, rs_pretty_ant(ant), bw, mcs, nss, |
1a61b347 | 3574 | (rate & RATE_MCS_SGI_MSK) ? "SGI " : "NGI ", |
7b1dd048 | 3575 | (rate & RATE_MCS_HT_STBC_MSK) ? "STBC " : "", |
1a61b347 ES |
3576 | (rate & RATE_MCS_LDPC_MSK) ? "LDPC " : "", |
3577 | (rate & RATE_MCS_BF_MSK) ? "BF " : "", | |
3578 | (rate & RATE_MCS_ZLF_MSK) ? "ZLF " : ""); | |
3579 | } | |
3580 | ||
a0c38b21 ES |
3581 | /** |
3582 | * Program the device to use fixed rate for frame transmit | |
3583 | * This is for debugging/testing only | |
3584 | * once the device start use fixed rate, we need to reload the module | |
3585 | * to being back the normal operation. | |
3586 | */ | |
3587 | static void rs_program_fix_rate(struct iwl_mvm *mvm, | |
3588 | struct iwl_lq_sta *lq_sta) | |
3589 | { | |
3590 | lq_sta->active_legacy_rate = 0x0FFF; /* 1 - 54 MBits, includes CCK */ | |
3591 | lq_sta->active_siso_rate = 0x1FD0; /* 6 - 60 MBits, no 9, no CCK */ | |
3592 | lq_sta->active_mimo2_rate = 0x1FD0; /* 6 - 60 MBits, no 9, no CCK */ | |
3593 | ||
3594 | IWL_DEBUG_RATE(mvm, "sta_id %d rate 0x%X\n", | |
ae969afe | 3595 | lq_sta->lq.sta_id, lq_sta->pers.dbg_fixed_rate); |
a0c38b21 | 3596 | |
ae969afe | 3597 | if (lq_sta->pers.dbg_fixed_rate) { |
7ceb98a3 | 3598 | rs_fill_lq_cmd(mvm, NULL, lq_sta, NULL); |
ae969afe | 3599 | iwl_mvm_send_lq_cmd(lq_sta->pers.drv, &lq_sta->lq, false); |
a0c38b21 ES |
3600 | } |
3601 | } | |
3602 | ||
9d10849e EG |
3603 | static ssize_t rs_sta_dbgfs_scale_table_write(struct file *file, |
3604 | const char __user *user_buf, size_t count, loff_t *ppos) | |
3605 | { | |
3606 | struct iwl_lq_sta *lq_sta = file->private_data; | |
3607 | struct iwl_mvm *mvm; | |
3608 | char buf[64]; | |
3609 | size_t buf_size; | |
3610 | u32 parsed_rate; | |
3611 | ||
ae969afe | 3612 | mvm = lq_sta->pers.drv; |
9d10849e EG |
3613 | memset(buf, 0, sizeof(buf)); |
3614 | buf_size = min(count, sizeof(buf) - 1); | |
3615 | if (copy_from_user(buf, user_buf, buf_size)) | |
3616 | return -EFAULT; | |
3617 | ||
3618 | if (sscanf(buf, "%x", &parsed_rate) == 1) | |
ae969afe | 3619 | lq_sta->pers.dbg_fixed_rate = parsed_rate; |
9d10849e | 3620 | else |
ae969afe | 3621 | lq_sta->pers.dbg_fixed_rate = 0; |
9d10849e EG |
3622 | |
3623 | rs_program_fix_rate(mvm, lq_sta); | |
3624 | ||
3625 | return count; | |
3626 | } | |
3627 | ||
8ca151b5 JB |
3628 | static ssize_t rs_sta_dbgfs_scale_table_read(struct file *file, |
3629 | char __user *user_buf, size_t count, loff_t *ppos) | |
3630 | { | |
3631 | char *buff; | |
3632 | int desc = 0; | |
3633 | int i = 0; | |
8ca151b5 JB |
3634 | ssize_t ret; |
3635 | ||
3636 | struct iwl_lq_sta *lq_sta = file->private_data; | |
3637 | struct iwl_mvm *mvm; | |
3638 | struct iwl_scale_tbl_info *tbl = &(lq_sta->lq_info[lq_sta->active_tbl]); | |
5aa33553 | 3639 | struct rs_rate *rate = &tbl->rate; |
16c426ff | 3640 | u32 ss_params; |
ae969afe | 3641 | mvm = lq_sta->pers.drv; |
1a61b347 | 3642 | buff = kmalloc(2048, GFP_KERNEL); |
8ca151b5 JB |
3643 | if (!buff) |
3644 | return -ENOMEM; | |
3645 | ||
3646 | desc += sprintf(buff+desc, "sta_id %d\n", lq_sta->lq.sta_id); | |
198266a3 | 3647 | desc += sprintf(buff+desc, "failed=%d success=%d rate=0%lX\n", |
8ca151b5 JB |
3648 | lq_sta->total_failed, lq_sta->total_success, |
3649 | lq_sta->active_legacy_rate); | |
3650 | desc += sprintf(buff+desc, "fixed rate 0x%X\n", | |
ae969afe | 3651 | lq_sta->pers.dbg_fixed_rate); |
8ca151b5 | 3652 | desc += sprintf(buff+desc, "valid_tx_ant %s%s%s\n", |
a0544272 MH |
3653 | (iwl_mvm_get_valid_tx_ant(mvm) & ANT_A) ? "ANT_A," : "", |
3654 | (iwl_mvm_get_valid_tx_ant(mvm) & ANT_B) ? "ANT_B," : "", | |
3655 | (iwl_mvm_get_valid_tx_ant(mvm) & ANT_C) ? "ANT_C" : ""); | |
8ca151b5 | 3656 | desc += sprintf(buff+desc, "lq type %s\n", |
5aa33553 ES |
3657 | (is_legacy(rate)) ? "legacy" : |
3658 | is_vht(rate) ? "VHT" : "HT"); | |
3659 | if (!is_legacy(rate)) { | |
e70fe7eb | 3660 | desc += sprintf(buff + desc, " %s", |
5aa33553 | 3661 | (is_siso(rate)) ? "SISO" : "MIMO2"); |
e70fe7eb EG |
3662 | desc += sprintf(buff + desc, " %s", |
3663 | (is_ht20(rate)) ? "20MHz" : | |
3664 | (is_ht40(rate)) ? "40MHz" : | |
3665 | (is_ht80(rate)) ? "80Mhz" : "BAD BW"); | |
3666 | desc += sprintf(buff + desc, " %s %s %s\n", | |
3667 | (rate->sgi) ? "SGI" : "NGI", | |
3668 | (rate->ldpc) ? "LDPC" : "BCC", | |
3669 | (lq_sta->is_agg) ? "AGG on" : ""); | |
8ca151b5 JB |
3670 | } |
3671 | desc += sprintf(buff+desc, "last tx rate=0x%X\n", | |
3672 | lq_sta->last_rate_n_flags); | |
3673 | desc += sprintf(buff+desc, | |
1a61b347 | 3674 | "general: flags=0x%X mimo-d=%d s-ant=0x%x d-ant=0x%x\n", |
8ca151b5 JB |
3675 | lq_sta->lq.flags, |
3676 | lq_sta->lq.mimo_delim, | |
3677 | lq_sta->lq.single_stream_ant_msk, | |
3678 | lq_sta->lq.dual_stream_ant_msk); | |
3679 | ||
3680 | desc += sprintf(buff+desc, | |
3681 | "agg: time_limit=%d dist_start_th=%d frame_cnt_limit=%d\n", | |
3682 | le16_to_cpu(lq_sta->lq.agg_time_limit), | |
3683 | lq_sta->lq.agg_disable_start_th, | |
3684 | lq_sta->lq.agg_frame_cnt_limit); | |
3685 | ||
2fd647f8 | 3686 | desc += sprintf(buff+desc, "reduced tpc=%d\n", lq_sta->lq.reduced_tpc); |
16c426ff ES |
3687 | ss_params = le32_to_cpu(lq_sta->lq.ss_params); |
3688 | desc += sprintf(buff+desc, "single stream params: %s%s%s%s\n", | |
3689 | (ss_params & LQ_SS_PARAMS_VALID) ? | |
db7c689d | 3690 | "VALID" : "INVALID", |
16c426ff | 3691 | (ss_params & LQ_SS_BFER_ALLOWED) ? |
db7c689d | 3692 | ", BFER" : "", |
16c426ff | 3693 | (ss_params & LQ_SS_STBC_1SS_ALLOWED) ? |
db7c689d | 3694 | ", STBC" : "", |
16c426ff | 3695 | (ss_params & LQ_SS_FORCE) ? |
db7c689d | 3696 | ", FORCE" : ""); |
8ca151b5 JB |
3697 | desc += sprintf(buff+desc, |
3698 | "Start idx [0]=0x%x [1]=0x%x [2]=0x%x [3]=0x%x\n", | |
3699 | lq_sta->lq.initial_rate_index[0], | |
3700 | lq_sta->lq.initial_rate_index[1], | |
3701 | lq_sta->lq.initial_rate_index[2], | |
3702 | lq_sta->lq.initial_rate_index[3]); | |
3703 | ||
3704 | for (i = 0; i < LINK_QUAL_MAX_RETRY_NUM; i++) { | |
cf4ef654 | 3705 | u32 r = le32_to_cpu(lq_sta->lq.rs_table[i]); |
1a61b347 | 3706 | |
cf4ef654 JB |
3707 | desc += sprintf(buff+desc, " rate[%d] 0x%X ", i, r); |
3708 | desc += rs_pretty_print_rate(buff+desc, r); | |
8ca151b5 JB |
3709 | } |
3710 | ||
3711 | ret = simple_read_from_buffer(user_buf, count, ppos, buff, desc); | |
3712 | kfree(buff); | |
3713 | return ret; | |
3714 | } | |
3715 | ||
3716 | static const struct file_operations rs_sta_dbgfs_scale_table_ops = { | |
3717 | .write = rs_sta_dbgfs_scale_table_write, | |
3718 | .read = rs_sta_dbgfs_scale_table_read, | |
3719 | .open = simple_open, | |
3720 | .llseek = default_llseek, | |
3721 | }; | |
3722 | static ssize_t rs_sta_dbgfs_stats_table_read(struct file *file, | |
3723 | char __user *user_buf, size_t count, loff_t *ppos) | |
3724 | { | |
3725 | char *buff; | |
3726 | int desc = 0; | |
3727 | int i, j; | |
3728 | ssize_t ret; | |
d310e405 | 3729 | struct iwl_scale_tbl_info *tbl; |
5aa33553 | 3730 | struct rs_rate *rate; |
8ca151b5 JB |
3731 | struct iwl_lq_sta *lq_sta = file->private_data; |
3732 | ||
3733 | buff = kmalloc(1024, GFP_KERNEL); | |
3734 | if (!buff) | |
3735 | return -ENOMEM; | |
3736 | ||
3737 | for (i = 0; i < LQ_SIZE; i++) { | |
d310e405 | 3738 | tbl = &(lq_sta->lq_info[i]); |
5aa33553 | 3739 | rate = &tbl->rate; |
8ca151b5 | 3740 | desc += sprintf(buff+desc, |
6a524f48 | 3741 | "%s type=%d SGI=%d BW=%s DUP=0\n" |
8fc7c58c | 3742 | "index=%d\n", |
8ca151b5 | 3743 | lq_sta->active_tbl == i ? "*" : "x", |
5aa33553 ES |
3744 | rate->type, |
3745 | rate->sgi, | |
3746 | is_ht20(rate) ? "20Mhz" : | |
3747 | is_ht40(rate) ? "40Mhz" : | |
3748 | is_ht80(rate) ? "80Mhz" : "ERR", | |
8fc7c58c | 3749 | rate->index); |
8ca151b5 JB |
3750 | for (j = 0; j < IWL_RATE_COUNT; j++) { |
3751 | desc += sprintf(buff+desc, | |
3752 | "counter=%d success=%d %%=%d\n", | |
d310e405 ES |
3753 | tbl->win[j].counter, |
3754 | tbl->win[j].success_counter, | |
3755 | tbl->win[j].success_ratio); | |
8ca151b5 JB |
3756 | } |
3757 | } | |
3758 | ret = simple_read_from_buffer(user_buf, count, ppos, buff, desc); | |
3759 | kfree(buff); | |
3760 | return ret; | |
3761 | } | |
3762 | ||
3763 | static const struct file_operations rs_sta_dbgfs_stats_table_ops = { | |
3764 | .read = rs_sta_dbgfs_stats_table_read, | |
3765 | .open = simple_open, | |
3766 | .llseek = default_llseek, | |
3767 | }; | |
3768 | ||
757cf23b ES |
3769 | static ssize_t rs_sta_dbgfs_drv_tx_stats_read(struct file *file, |
3770 | char __user *user_buf, | |
3771 | size_t count, loff_t *ppos) | |
3772 | { | |
3773 | static const char * const column_name[] = { | |
3774 | [RS_COLUMN_LEGACY_ANT_A] = "LEGACY_ANT_A", | |
3775 | [RS_COLUMN_LEGACY_ANT_B] = "LEGACY_ANT_B", | |
3776 | [RS_COLUMN_SISO_ANT_A] = "SISO_ANT_A", | |
3777 | [RS_COLUMN_SISO_ANT_B] = "SISO_ANT_B", | |
3778 | [RS_COLUMN_SISO_ANT_A_SGI] = "SISO_ANT_A_SGI", | |
3779 | [RS_COLUMN_SISO_ANT_B_SGI] = "SISO_ANT_B_SGI", | |
3780 | [RS_COLUMN_MIMO2] = "MIMO2", | |
3781 | [RS_COLUMN_MIMO2_SGI] = "MIMO2_SGI", | |
3782 | }; | |
3783 | ||
3784 | static const char * const rate_name[] = { | |
3785 | [IWL_RATE_1M_INDEX] = "1M", | |
3786 | [IWL_RATE_2M_INDEX] = "2M", | |
3787 | [IWL_RATE_5M_INDEX] = "5.5M", | |
3788 | [IWL_RATE_11M_INDEX] = "11M", | |
3789 | [IWL_RATE_6M_INDEX] = "6M|MCS0", | |
3790 | [IWL_RATE_9M_INDEX] = "9M", | |
3791 | [IWL_RATE_12M_INDEX] = "12M|MCS1", | |
3792 | [IWL_RATE_18M_INDEX] = "18M|MCS2", | |
3793 | [IWL_RATE_24M_INDEX] = "24M|MCS3", | |
3794 | [IWL_RATE_36M_INDEX] = "36M|MCS4", | |
3795 | [IWL_RATE_48M_INDEX] = "48M|MCS5", | |
3796 | [IWL_RATE_54M_INDEX] = "54M|MCS6", | |
3797 | [IWL_RATE_MCS_7_INDEX] = "MCS7", | |
3798 | [IWL_RATE_MCS_8_INDEX] = "MCS8", | |
3799 | [IWL_RATE_MCS_9_INDEX] = "MCS9", | |
3800 | }; | |
3801 | ||
3802 | char *buff, *pos, *endpos; | |
3803 | int col, rate; | |
3804 | ssize_t ret; | |
3805 | struct iwl_lq_sta *lq_sta = file->private_data; | |
3806 | struct rs_rate_stats *stats; | |
3807 | static const size_t bufsz = 1024; | |
3808 | ||
3809 | buff = kmalloc(bufsz, GFP_KERNEL); | |
3810 | if (!buff) | |
3811 | return -ENOMEM; | |
3812 | ||
3813 | pos = buff; | |
3814 | endpos = pos + bufsz; | |
3815 | ||
3816 | pos += scnprintf(pos, endpos - pos, "COLUMN,"); | |
3817 | for (rate = 0; rate < IWL_RATE_COUNT; rate++) | |
3818 | pos += scnprintf(pos, endpos - pos, "%s,", rate_name[rate]); | |
3819 | pos += scnprintf(pos, endpos - pos, "\n"); | |
3820 | ||
3821 | for (col = 0; col < RS_COLUMN_COUNT; col++) { | |
3822 | pos += scnprintf(pos, endpos - pos, | |
3823 | "%s,", column_name[col]); | |
3824 | ||
3825 | for (rate = 0; rate < IWL_RATE_COUNT; rate++) { | |
f58220f6 | 3826 | stats = &(lq_sta->pers.tx_stats[col][rate]); |
757cf23b ES |
3827 | pos += scnprintf(pos, endpos - pos, |
3828 | "%llu/%llu,", | |
3829 | stats->success, | |
3830 | stats->total); | |
3831 | } | |
3832 | pos += scnprintf(pos, endpos - pos, "\n"); | |
3833 | } | |
3834 | ||
3835 | ret = simple_read_from_buffer(user_buf, count, ppos, buff, pos - buff); | |
3836 | kfree(buff); | |
3837 | return ret; | |
3838 | } | |
3839 | ||
3840 | static ssize_t rs_sta_dbgfs_drv_tx_stats_write(struct file *file, | |
3841 | const char __user *user_buf, | |
3842 | size_t count, loff_t *ppos) | |
3843 | { | |
3844 | struct iwl_lq_sta *lq_sta = file->private_data; | |
f58220f6 | 3845 | memset(lq_sta->pers.tx_stats, 0, sizeof(lq_sta->pers.tx_stats)); |
757cf23b ES |
3846 | |
3847 | return count; | |
3848 | } | |
3849 | ||
3850 | static const struct file_operations rs_sta_dbgfs_drv_tx_stats_ops = { | |
3851 | .read = rs_sta_dbgfs_drv_tx_stats_read, | |
3852 | .write = rs_sta_dbgfs_drv_tx_stats_write, | |
3853 | .open = simple_open, | |
3854 | .llseek = default_llseek, | |
3855 | }; | |
3856 | ||
1e9c62fa ES |
3857 | static ssize_t iwl_dbgfs_ss_force_read(struct file *file, |
3858 | char __user *user_buf, | |
3859 | size_t count, loff_t *ppos) | |
3860 | { | |
3861 | struct iwl_lq_sta *lq_sta = file->private_data; | |
3862 | char buf[12]; | |
3863 | int bufsz = sizeof(buf); | |
3864 | int pos = 0; | |
3865 | static const char * const ss_force_name[] = { | |
3866 | [RS_SS_FORCE_NONE] = "none", | |
3867 | [RS_SS_FORCE_STBC] = "stbc", | |
3868 | [RS_SS_FORCE_BFER] = "bfer", | |
3869 | [RS_SS_FORCE_SISO] = "siso", | |
3870 | }; | |
3871 | ||
3872 | pos += scnprintf(buf+pos, bufsz-pos, "%s\n", | |
878985ce | 3873 | ss_force_name[lq_sta->pers.ss_force]); |
1e9c62fa ES |
3874 | return simple_read_from_buffer(user_buf, count, ppos, buf, pos); |
3875 | } | |
3876 | ||
3877 | static ssize_t iwl_dbgfs_ss_force_write(struct iwl_lq_sta *lq_sta, char *buf, | |
3878 | size_t count, loff_t *ppos) | |
3879 | { | |
3880 | struct iwl_mvm *mvm = lq_sta->pers.drv; | |
3881 | int ret = 0; | |
3882 | ||
3883 | if (!strncmp("none", buf, 4)) { | |
878985ce | 3884 | lq_sta->pers.ss_force = RS_SS_FORCE_NONE; |
1e9c62fa | 3885 | } else if (!strncmp("siso", buf, 4)) { |
878985ce | 3886 | lq_sta->pers.ss_force = RS_SS_FORCE_SISO; |
1e9c62fa ES |
3887 | } else if (!strncmp("stbc", buf, 4)) { |
3888 | if (lq_sta->stbc_capable) { | |
878985ce | 3889 | lq_sta->pers.ss_force = RS_SS_FORCE_STBC; |
1e9c62fa ES |
3890 | } else { |
3891 | IWL_ERR(mvm, | |
3892 | "can't force STBC. peer doesn't support\n"); | |
3893 | ret = -EINVAL; | |
3894 | } | |
3895 | } else if (!strncmp("bfer", buf, 4)) { | |
3896 | if (lq_sta->bfer_capable) { | |
878985ce | 3897 | lq_sta->pers.ss_force = RS_SS_FORCE_BFER; |
1e9c62fa ES |
3898 | } else { |
3899 | IWL_ERR(mvm, | |
3900 | "can't force BFER. peer doesn't support\n"); | |
3901 | ret = -EINVAL; | |
3902 | } | |
3903 | } else { | |
3904 | IWL_ERR(mvm, "valid values none|siso|stbc|bfer\n"); | |
3905 | ret = -EINVAL; | |
3906 | } | |
3907 | return ret ?: count; | |
3908 | } | |
3909 | ||
3910 | #define MVM_DEBUGFS_READ_WRITE_FILE_OPS(name, bufsz) \ | |
3911 | _MVM_DEBUGFS_READ_WRITE_FILE_OPS(name, bufsz, struct iwl_lq_sta) | |
3912 | #define MVM_DEBUGFS_ADD_FILE_RS(name, parent, mode) do { \ | |
3913 | if (!debugfs_create_file(#name, mode, parent, lq_sta, \ | |
3914 | &iwl_dbgfs_##name##_ops)) \ | |
3915 | goto err; \ | |
3916 | } while (0) | |
3917 | ||
3918 | MVM_DEBUGFS_READ_WRITE_FILE_OPS(ss_force, 32); | |
3919 | ||
dcbc17ad | 3920 | static void rs_add_debugfs(void *mvm, void *priv_sta, struct dentry *dir) |
8ca151b5 | 3921 | { |
dcbc17ad JB |
3922 | struct iwl_lq_sta *lq_sta = priv_sta; |
3923 | struct iwl_mvm_sta *mvmsta; | |
3924 | ||
3925 | mvmsta = container_of(lq_sta, struct iwl_mvm_sta, lq_sta); | |
3926 | ||
3927 | if (!mvmsta->vif) | |
3928 | return; | |
1e9c62fa | 3929 | |
c6e1faad EP |
3930 | debugfs_create_file("rate_scale_table", S_IRUSR | S_IWUSR, dir, |
3931 | lq_sta, &rs_sta_dbgfs_scale_table_ops); | |
3932 | debugfs_create_file("rate_stats_table", S_IRUSR, dir, | |
3933 | lq_sta, &rs_sta_dbgfs_stats_table_ops); | |
3934 | debugfs_create_file("drv_tx_stats", S_IRUSR | S_IWUSR, dir, | |
3935 | lq_sta, &rs_sta_dbgfs_drv_tx_stats_ops); | |
3936 | debugfs_create_u8("tx_agg_tid_enable", S_IRUSR | S_IWUSR, dir, | |
3937 | &lq_sta->tx_agg_tid_en); | |
3938 | debugfs_create_u8("reduced_tpc", S_IRUSR | S_IWUSR, dir, | |
3939 | &lq_sta->pers.dbg_fixed_txp_reduction); | |
1e9c62fa ES |
3940 | |
3941 | MVM_DEBUGFS_ADD_FILE_RS(ss_force, dir, S_IRUSR | S_IWUSR); | |
3942 | return; | |
3943 | err: | |
3944 | IWL_ERR((struct iwl_mvm *)mvm, "Can't create debugfs entity\n"); | |
8ca151b5 JB |
3945 | } |
3946 | ||
3947 | static void rs_remove_debugfs(void *mvm, void *mvm_sta) | |
3948 | { | |
8ca151b5 JB |
3949 | } |
3950 | #endif | |
3951 | ||
3952 | /* | |
3953 | * Initialization of rate scaling information is done by driver after | |
3954 | * the station is added. Since mac80211 calls this function before a | |
3955 | * station is added we ignore it. | |
3956 | */ | |
3957 | static void rs_rate_init_stub(void *mvm_r, | |
3de805cf SW |
3958 | struct ieee80211_supported_band *sband, |
3959 | struct cfg80211_chan_def *chandef, | |
3960 | struct ieee80211_sta *sta, void *mvm_sta) | |
8ca151b5 JB |
3961 | { |
3962 | } | |
631ad703 JB |
3963 | |
3964 | static const struct rate_control_ops rs_mvm_ops = { | |
8ca151b5 | 3965 | .name = RS_NAME, |
1ebc8f2e | 3966 | .tx_status = rs_mac80211_tx_status, |
8ca151b5 JB |
3967 | .get_rate = rs_get_rate, |
3968 | .rate_init = rs_rate_init_stub, | |
3969 | .alloc = rs_alloc, | |
3970 | .free = rs_free, | |
3971 | .alloc_sta = rs_alloc_sta, | |
3972 | .free_sta = rs_free_sta, | |
b87c2179 | 3973 | .rate_update = rs_rate_update, |
8ca151b5 JB |
3974 | #ifdef CONFIG_MAC80211_DEBUGFS |
3975 | .add_sta_debugfs = rs_add_debugfs, | |
3976 | .remove_sta_debugfs = rs_remove_debugfs, | |
3977 | #endif | |
3978 | }; | |
3979 | ||
3980 | int iwl_mvm_rate_control_register(void) | |
3981 | { | |
3982 | return ieee80211_rate_control_register(&rs_mvm_ops); | |
3983 | } | |
3984 | ||
3985 | void iwl_mvm_rate_control_unregister(void) | |
3986 | { | |
3987 | ieee80211_rate_control_unregister(&rs_mvm_ops); | |
3988 | } | |
9ee718aa EL |
3989 | |
3990 | /** | |
3991 | * iwl_mvm_tx_protection - Gets LQ command, change it to enable/disable | |
0d365ae5 | 3992 | * Tx protection, according to this request and previous requests, |
9ee718aa | 3993 | * and send the LQ command. |
9ee718aa EL |
3994 | * @mvmsta: The station |
3995 | * @enable: Enable Tx protection? | |
3996 | */ | |
e126b5d9 JB |
3997 | int iwl_mvm_tx_protection(struct iwl_mvm *mvm, struct iwl_mvm_sta *mvmsta, |
3998 | bool enable) | |
9ee718aa | 3999 | { |
e126b5d9 JB |
4000 | struct iwl_lq_cmd *lq = &mvmsta->lq_sta.lq; |
4001 | ||
9ee718aa EL |
4002 | lockdep_assert_held(&mvm->mutex); |
4003 | ||
4004 | if (enable) { | |
4005 | if (mvmsta->tx_protection == 0) | |
d307ec8d | 4006 | lq->flags |= LQ_FLAG_USE_RTS_MSK; |
9ee718aa EL |
4007 | mvmsta->tx_protection++; |
4008 | } else { | |
4009 | mvmsta->tx_protection--; | |
4010 | if (mvmsta->tx_protection == 0) | |
d307ec8d | 4011 | lq->flags &= ~LQ_FLAG_USE_RTS_MSK; |
9ee718aa EL |
4012 | } |
4013 | ||
9e680946 | 4014 | return iwl_mvm_send_lq_cmd(mvm, lq, false); |
9ee718aa | 4015 | } |