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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 |
69c7fda4 | 5 | * Copyright(c) 2016 Intel Deutschland GmbH |
8ca151b5 JB |
6 | * |
7 | * This program is free software; you can redistribute it and/or modify it | |
8 | * under the terms of version 2 of the GNU General Public License as | |
9 | * published by the Free Software Foundation. | |
10 | * | |
11 | * This program is distributed in the hope that it will be useful, but WITHOUT | |
12 | * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or | |
13 | * FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License for | |
14 | * more details. | |
15 | * | |
16 | * You should have received a copy of the GNU General Public License along with | |
17 | * this program; if not, write to the Free Software Foundation, Inc., | |
18 | * 51 Franklin Street, Fifth Floor, Boston, MA 02110, USA | |
19 | * | |
20 | * The full GNU General Public License is included in this distribution in the | |
21 | * file called LICENSE. | |
22 | * | |
23 | * Contact Information: | |
cb2f8277 | 24 | * Intel Linux Wireless <linuxwifi@intel.com> |
8ca151b5 JB |
25 | * Intel Corporation, 5200 N.E. Elam Young Parkway, Hillsboro, OR 97124-6497 |
26 | * | |
27 | *****************************************************************************/ | |
28 | #include <linux/kernel.h> | |
8ca151b5 JB |
29 | #include <linux/skbuff.h> |
30 | #include <linux/slab.h> | |
31 | #include <net/mac80211.h> | |
32 | ||
33 | #include <linux/netdevice.h> | |
34 | #include <linux/etherdevice.h> | |
35 | #include <linux/delay.h> | |
36 | ||
37 | #include <linux/workqueue.h> | |
38 | #include "rs.h" | |
39 | #include "fw-api.h" | |
40 | #include "sta.h" | |
41 | #include "iwl-op-mode.h" | |
42 | #include "mvm.h" | |
1e9c62fa | 43 | #include "debugfs.h" |
8ca151b5 JB |
44 | |
45 | #define RS_NAME "iwl-mvm-rs" | |
46 | ||
8ca151b5 | 47 | #define IWL_RATE_MAX_WINDOW 62 /* # tx in history window */ |
8ca151b5 | 48 | |
834437da ES |
49 | /* Calculations of success ratio are done in fixed point where 12800 is 100%. |
50 | * Use this macro when dealing with thresholds consts set as a percentage | |
51 | */ | |
52 | #define RS_PERCENT(x) (128 * x) | |
8ca151b5 JB |
53 | |
54 | static u8 rs_ht_to_legacy[] = { | |
da87d7d5 ES |
55 | [IWL_RATE_MCS_0_INDEX] = IWL_RATE_6M_INDEX, |
56 | [IWL_RATE_MCS_1_INDEX] = IWL_RATE_9M_INDEX, | |
57 | [IWL_RATE_MCS_2_INDEX] = IWL_RATE_12M_INDEX, | |
58 | [IWL_RATE_MCS_3_INDEX] = IWL_RATE_18M_INDEX, | |
59 | [IWL_RATE_MCS_4_INDEX] = IWL_RATE_24M_INDEX, | |
60 | [IWL_RATE_MCS_5_INDEX] = IWL_RATE_36M_INDEX, | |
61 | [IWL_RATE_MCS_6_INDEX] = IWL_RATE_48M_INDEX, | |
62 | [IWL_RATE_MCS_7_INDEX] = IWL_RATE_54M_INDEX, | |
63 | [IWL_RATE_MCS_8_INDEX] = IWL_RATE_54M_INDEX, | |
64 | [IWL_RATE_MCS_9_INDEX] = IWL_RATE_54M_INDEX, | |
8ca151b5 JB |
65 | }; |
66 | ||
67 | static const u8 ant_toggle_lookup[] = { | |
ef4394b9 EP |
68 | [ANT_NONE] = ANT_NONE, |
69 | [ANT_A] = ANT_B, | |
70 | [ANT_B] = ANT_C, | |
71 | [ANT_AB] = ANT_BC, | |
72 | [ANT_C] = ANT_A, | |
73 | [ANT_AC] = ANT_AB, | |
74 | [ANT_BC] = ANT_AC, | |
75 | [ANT_ABC] = ANT_ABC, | |
8ca151b5 JB |
76 | }; |
77 | ||
d310e405 ES |
78 | #define IWL_DECLARE_RATE_INFO(r, s, rp, rn) \ |
79 | [IWL_RATE_##r##M_INDEX] = { IWL_RATE_##r##M_PLCP, \ | |
80 | IWL_RATE_HT_SISO_MCS_##s##_PLCP, \ | |
81 | IWL_RATE_HT_MIMO2_MCS_##s##_PLCP, \ | |
82 | IWL_RATE_VHT_SISO_MCS_##s##_PLCP, \ | |
83 | IWL_RATE_VHT_MIMO2_MCS_##s##_PLCP,\ | |
84 | IWL_RATE_##rp##M_INDEX, \ | |
ab055ce9 | 85 | IWL_RATE_##rn##M_INDEX } |
8ca151b5 | 86 | |
d310e405 ES |
87 | #define IWL_DECLARE_MCS_RATE(s) \ |
88 | [IWL_RATE_MCS_##s##_INDEX] = { IWL_RATE_INVM_PLCP, \ | |
89 | IWL_RATE_HT_SISO_MCS_##s##_PLCP, \ | |
90 | IWL_RATE_HT_MIMO2_MCS_##s##_PLCP, \ | |
91 | IWL_RATE_VHT_SISO_MCS_##s##_PLCP, \ | |
92 | IWL_RATE_VHT_MIMO2_MCS_##s##_PLCP, \ | |
93 | IWL_RATE_INVM_INDEX, \ | |
94 | IWL_RATE_INVM_INDEX } | |
95 | ||
8ca151b5 JB |
96 | /* |
97 | * Parameter order: | |
ab055ce9 | 98 | * rate, ht rate, prev rate, next rate |
8ca151b5 JB |
99 | * |
100 | * If there isn't a valid next or previous rate then INV is used which | |
101 | * maps to IWL_RATE_INVALID | |
102 | * | |
103 | */ | |
104 | static const struct iwl_rs_rate_info iwl_rates[IWL_RATE_COUNT] = { | |
ab055ce9 ES |
105 | IWL_DECLARE_RATE_INFO(1, INV, INV, 2), /* 1mbps */ |
106 | IWL_DECLARE_RATE_INFO(2, INV, 1, 5), /* 2mbps */ | |
107 | IWL_DECLARE_RATE_INFO(5, INV, 2, 11), /*5.5mbps */ | |
108 | IWL_DECLARE_RATE_INFO(11, INV, 9, 12), /* 11mbps */ | |
d310e405 ES |
109 | IWL_DECLARE_RATE_INFO(6, 0, 5, 11), /* 6mbps ; MCS 0 */ |
110 | IWL_DECLARE_RATE_INFO(9, INV, 6, 11), /* 9mbps */ | |
111 | IWL_DECLARE_RATE_INFO(12, 1, 11, 18), /* 12mbps ; MCS 1 */ | |
112 | IWL_DECLARE_RATE_INFO(18, 2, 12, 24), /* 18mbps ; MCS 2 */ | |
113 | IWL_DECLARE_RATE_INFO(24, 3, 18, 36), /* 24mbps ; MCS 3 */ | |
114 | IWL_DECLARE_RATE_INFO(36, 4, 24, 48), /* 36mbps ; MCS 4 */ | |
115 | IWL_DECLARE_RATE_INFO(48, 5, 36, 54), /* 48mbps ; MCS 5 */ | |
116 | IWL_DECLARE_RATE_INFO(54, 6, 48, INV), /* 54mbps ; MCS 6 */ | |
117 | IWL_DECLARE_MCS_RATE(7), /* MCS 7 */ | |
118 | IWL_DECLARE_MCS_RATE(8), /* MCS 8 */ | |
119 | IWL_DECLARE_MCS_RATE(9), /* MCS 9 */ | |
8ca151b5 JB |
120 | }; |
121 | ||
4e4b815c ES |
122 | enum rs_action { |
123 | RS_ACTION_STAY = 0, | |
124 | RS_ACTION_DOWNSCALE = -1, | |
125 | RS_ACTION_UPSCALE = 1, | |
126 | }; | |
127 | ||
b3b06a32 ES |
128 | enum rs_column_mode { |
129 | RS_INVALID = 0, | |
130 | RS_LEGACY, | |
131 | RS_SISO, | |
132 | RS_MIMO2, | |
133 | }; | |
134 | ||
fd7dbee5 | 135 | #define MAX_NEXT_COLUMNS 7 |
b3b06a32 ES |
136 | #define MAX_COLUMN_CHECKS 3 |
137 | ||
0b8d17f3 ES |
138 | struct rs_tx_column; |
139 | ||
b3b06a32 ES |
140 | typedef bool (*allow_column_func_t) (struct iwl_mvm *mvm, |
141 | struct ieee80211_sta *sta, | |
bb8f44c9 | 142 | struct rs_rate *rate, |
0b8d17f3 | 143 | const struct rs_tx_column *next_col); |
b3b06a32 ES |
144 | |
145 | struct rs_tx_column { | |
146 | enum rs_column_mode mode; | |
147 | u8 ant; | |
148 | bool sgi; | |
149 | enum rs_column next_columns[MAX_NEXT_COLUMNS]; | |
150 | allow_column_func_t checks[MAX_COLUMN_CHECKS]; | |
151 | }; | |
152 | ||
219fb66b | 153 | static bool rs_ant_allow(struct iwl_mvm *mvm, struct ieee80211_sta *sta, |
bb8f44c9 | 154 | struct rs_rate *rate, |
0b8d17f3 | 155 | const struct rs_tx_column *next_col) |
219fb66b | 156 | { |
0b8d17f3 | 157 | return iwl_mvm_bt_coex_is_ant_avail(mvm, next_col->ant); |
219fb66b EG |
158 | } |
159 | ||
b3b06a32 | 160 | static bool rs_mimo_allow(struct iwl_mvm *mvm, struct ieee80211_sta *sta, |
bb8f44c9 | 161 | struct rs_rate *rate, |
0b8d17f3 | 162 | const struct rs_tx_column *next_col) |
b3b06a32 | 163 | { |
7ac4a50a ES |
164 | struct iwl_mvm_sta *mvmsta; |
165 | struct iwl_mvm_vif *mvmvif; | |
166 | ||
b3b06a32 ES |
167 | if (!sta->ht_cap.ht_supported) |
168 | return false; | |
169 | ||
170 | if (sta->smps_mode == IEEE80211_SMPS_STATIC) | |
171 | return false; | |
172 | ||
a0544272 | 173 | if (num_of_ant(iwl_mvm_get_valid_tx_ant(mvm)) < 2) |
b3b06a32 ES |
174 | return false; |
175 | ||
176 | if (!iwl_mvm_bt_coex_is_mimo_allowed(mvm, sta)) | |
177 | return false; | |
178 | ||
7ac4a50a ES |
179 | mvmsta = iwl_mvm_sta_from_mac80211(sta); |
180 | mvmvif = iwl_mvm_vif_from_mac80211(mvmsta->vif); | |
7ac4a50a | 181 | |
5f0d98f2 EG |
182 | if (mvm->nvm_data->sku_cap_mimo_disabled) |
183 | return false; | |
184 | ||
b3b06a32 ES |
185 | return true; |
186 | } | |
187 | ||
188 | static bool rs_siso_allow(struct iwl_mvm *mvm, struct ieee80211_sta *sta, | |
bb8f44c9 | 189 | struct rs_rate *rate, |
0b8d17f3 | 190 | const struct rs_tx_column *next_col) |
b3b06a32 ES |
191 | { |
192 | if (!sta->ht_cap.ht_supported) | |
193 | return false; | |
194 | ||
195 | return true; | |
196 | } | |
197 | ||
198 | static bool rs_sgi_allow(struct iwl_mvm *mvm, struct ieee80211_sta *sta, | |
bb8f44c9 | 199 | struct rs_rate *rate, |
0b8d17f3 | 200 | const struct rs_tx_column *next_col) |
b3b06a32 | 201 | { |
b3b06a32 ES |
202 | struct ieee80211_sta_ht_cap *ht_cap = &sta->ht_cap; |
203 | struct ieee80211_sta_vht_cap *vht_cap = &sta->vht_cap; | |
204 | ||
205 | if (is_ht20(rate) && (ht_cap->cap & | |
206 | IEEE80211_HT_CAP_SGI_20)) | |
207 | return true; | |
208 | if (is_ht40(rate) && (ht_cap->cap & | |
209 | IEEE80211_HT_CAP_SGI_40)) | |
210 | return true; | |
211 | if (is_ht80(rate) && (vht_cap->cap & | |
212 | IEEE80211_VHT_CAP_SHORT_GI_80)) | |
213 | return true; | |
214 | ||
215 | return false; | |
216 | } | |
217 | ||
218 | static const struct rs_tx_column rs_tx_columns[] = { | |
219 | [RS_COLUMN_LEGACY_ANT_A] = { | |
220 | .mode = RS_LEGACY, | |
221 | .ant = ANT_A, | |
222 | .next_columns = { | |
223 | RS_COLUMN_LEGACY_ANT_B, | |
224 | RS_COLUMN_SISO_ANT_A, | |
31b20452 | 225 | RS_COLUMN_MIMO2, |
d8fff919 ES |
226 | RS_COLUMN_INVALID, |
227 | RS_COLUMN_INVALID, | |
fd7dbee5 ES |
228 | RS_COLUMN_INVALID, |
229 | RS_COLUMN_INVALID, | |
b3b06a32 | 230 | }, |
219fb66b EG |
231 | .checks = { |
232 | rs_ant_allow, | |
233 | }, | |
b3b06a32 ES |
234 | }, |
235 | [RS_COLUMN_LEGACY_ANT_B] = { | |
236 | .mode = RS_LEGACY, | |
237 | .ant = ANT_B, | |
238 | .next_columns = { | |
239 | RS_COLUMN_LEGACY_ANT_A, | |
240 | RS_COLUMN_SISO_ANT_B, | |
31b20452 | 241 | RS_COLUMN_MIMO2, |
d8fff919 ES |
242 | RS_COLUMN_INVALID, |
243 | RS_COLUMN_INVALID, | |
fd7dbee5 ES |
244 | RS_COLUMN_INVALID, |
245 | RS_COLUMN_INVALID, | |
b3b06a32 | 246 | }, |
219fb66b EG |
247 | .checks = { |
248 | rs_ant_allow, | |
249 | }, | |
b3b06a32 ES |
250 | }, |
251 | [RS_COLUMN_SISO_ANT_A] = { | |
252 | .mode = RS_SISO, | |
253 | .ant = ANT_A, | |
254 | .next_columns = { | |
255 | RS_COLUMN_SISO_ANT_B, | |
256 | RS_COLUMN_MIMO2, | |
257 | RS_COLUMN_SISO_ANT_A_SGI, | |
fd7dbee5 ES |
258 | RS_COLUMN_LEGACY_ANT_A, |
259 | RS_COLUMN_LEGACY_ANT_B, | |
d8fff919 | 260 | RS_COLUMN_INVALID, |
31b20452 | 261 | RS_COLUMN_INVALID, |
b3b06a32 ES |
262 | }, |
263 | .checks = { | |
264 | rs_siso_allow, | |
219fb66b | 265 | rs_ant_allow, |
b3b06a32 ES |
266 | }, |
267 | }, | |
268 | [RS_COLUMN_SISO_ANT_B] = { | |
269 | .mode = RS_SISO, | |
270 | .ant = ANT_B, | |
271 | .next_columns = { | |
272 | RS_COLUMN_SISO_ANT_A, | |
273 | RS_COLUMN_MIMO2, | |
274 | RS_COLUMN_SISO_ANT_B_SGI, | |
fd7dbee5 ES |
275 | RS_COLUMN_LEGACY_ANT_A, |
276 | RS_COLUMN_LEGACY_ANT_B, | |
d8fff919 | 277 | RS_COLUMN_INVALID, |
31b20452 | 278 | RS_COLUMN_INVALID, |
b3b06a32 ES |
279 | }, |
280 | .checks = { | |
281 | rs_siso_allow, | |
219fb66b | 282 | rs_ant_allow, |
b3b06a32 ES |
283 | }, |
284 | }, | |
285 | [RS_COLUMN_SISO_ANT_A_SGI] = { | |
286 | .mode = RS_SISO, | |
287 | .ant = ANT_A, | |
288 | .sgi = true, | |
289 | .next_columns = { | |
290 | RS_COLUMN_SISO_ANT_B_SGI, | |
291 | RS_COLUMN_MIMO2_SGI, | |
292 | RS_COLUMN_SISO_ANT_A, | |
fd7dbee5 ES |
293 | RS_COLUMN_LEGACY_ANT_A, |
294 | RS_COLUMN_LEGACY_ANT_B, | |
31b20452 ES |
295 | RS_COLUMN_INVALID, |
296 | RS_COLUMN_INVALID, | |
b3b06a32 ES |
297 | }, |
298 | .checks = { | |
299 | rs_siso_allow, | |
219fb66b | 300 | rs_ant_allow, |
b3b06a32 ES |
301 | rs_sgi_allow, |
302 | }, | |
303 | }, | |
304 | [RS_COLUMN_SISO_ANT_B_SGI] = { | |
305 | .mode = RS_SISO, | |
306 | .ant = ANT_B, | |
307 | .sgi = true, | |
308 | .next_columns = { | |
309 | RS_COLUMN_SISO_ANT_A_SGI, | |
310 | RS_COLUMN_MIMO2_SGI, | |
311 | RS_COLUMN_SISO_ANT_B, | |
fd7dbee5 ES |
312 | RS_COLUMN_LEGACY_ANT_A, |
313 | RS_COLUMN_LEGACY_ANT_B, | |
31b20452 ES |
314 | RS_COLUMN_INVALID, |
315 | RS_COLUMN_INVALID, | |
b3b06a32 ES |
316 | }, |
317 | .checks = { | |
318 | rs_siso_allow, | |
219fb66b | 319 | rs_ant_allow, |
b3b06a32 ES |
320 | rs_sgi_allow, |
321 | }, | |
322 | }, | |
323 | [RS_COLUMN_MIMO2] = { | |
324 | .mode = RS_MIMO2, | |
325 | .ant = ANT_AB, | |
326 | .next_columns = { | |
327 | RS_COLUMN_SISO_ANT_A, | |
328 | RS_COLUMN_MIMO2_SGI, | |
fd7dbee5 ES |
329 | RS_COLUMN_LEGACY_ANT_A, |
330 | RS_COLUMN_LEGACY_ANT_B, | |
31b20452 ES |
331 | RS_COLUMN_INVALID, |
332 | RS_COLUMN_INVALID, | |
333 | RS_COLUMN_INVALID, | |
b3b06a32 ES |
334 | }, |
335 | .checks = { | |
336 | rs_mimo_allow, | |
337 | }, | |
338 | }, | |
339 | [RS_COLUMN_MIMO2_SGI] = { | |
340 | .mode = RS_MIMO2, | |
341 | .ant = ANT_AB, | |
342 | .sgi = true, | |
343 | .next_columns = { | |
344 | RS_COLUMN_SISO_ANT_A_SGI, | |
345 | RS_COLUMN_MIMO2, | |
fd7dbee5 ES |
346 | RS_COLUMN_LEGACY_ANT_A, |
347 | RS_COLUMN_LEGACY_ANT_B, | |
31b20452 ES |
348 | RS_COLUMN_INVALID, |
349 | RS_COLUMN_INVALID, | |
350 | RS_COLUMN_INVALID, | |
b3b06a32 ES |
351 | }, |
352 | .checks = { | |
353 | rs_mimo_allow, | |
354 | rs_sgi_allow, | |
355 | }, | |
356 | }, | |
357 | }; | |
358 | ||
8ca151b5 JB |
359 | static inline u8 rs_extract_rate(u32 rate_n_flags) |
360 | { | |
361 | /* also works for HT because bits 7:6 are zero there */ | |
362 | return (u8)(rate_n_flags & RATE_LEGACY_RATE_MSK); | |
363 | } | |
364 | ||
365 | static int iwl_hwrate_to_plcp_idx(u32 rate_n_flags) | |
366 | { | |
367 | int idx = 0; | |
368 | ||
8ca151b5 | 369 | if (rate_n_flags & RATE_MCS_HT_MSK) { |
d310e405 ES |
370 | idx = rate_n_flags & RATE_HT_MCS_RATE_CODE_MSK; |
371 | idx += IWL_RATE_MCS_0_INDEX; | |
8ca151b5 | 372 | |
d310e405 | 373 | /* skip 9M not supported in HT*/ |
8ca151b5 JB |
374 | if (idx >= IWL_RATE_9M_INDEX) |
375 | idx += 1; | |
4e82dd3a | 376 | if ((idx >= IWL_FIRST_HT_RATE) && (idx <= IWL_LAST_HT_RATE)) |
8ca151b5 | 377 | return idx; |
d310e405 ES |
378 | } else if (rate_n_flags & RATE_MCS_VHT_MSK) { |
379 | idx = rate_n_flags & RATE_VHT_MCS_RATE_CODE_MSK; | |
380 | idx += IWL_RATE_MCS_0_INDEX; | |
8ca151b5 | 381 | |
d310e405 ES |
382 | /* skip 9M not supported in VHT*/ |
383 | if (idx >= IWL_RATE_9M_INDEX) | |
384 | idx++; | |
385 | if ((idx >= IWL_FIRST_VHT_RATE) && (idx <= IWL_LAST_VHT_RATE)) | |
386 | return idx; | |
8ca151b5 | 387 | } else { |
d310e405 ES |
388 | /* legacy rate format, search for match in table */ |
389 | ||
390 | u8 legacy_rate = rs_extract_rate(rate_n_flags); | |
8ca151b5 | 391 | for (idx = 0; idx < ARRAY_SIZE(iwl_rates); idx++) |
d310e405 | 392 | if (iwl_rates[idx].plcp == legacy_rate) |
8ca151b5 JB |
393 | return idx; |
394 | } | |
395 | ||
560843f4 | 396 | return IWL_RATE_INVALID; |
8ca151b5 JB |
397 | } |
398 | ||
399 | static void rs_rate_scale_perform(struct iwl_mvm *mvm, | |
1ebc8f2e ES |
400 | struct ieee80211_sta *sta, |
401 | struct iwl_lq_sta *lq_sta, | |
402 | int tid); | |
8fc7c58c ES |
403 | static void rs_fill_lq_cmd(struct iwl_mvm *mvm, |
404 | struct ieee80211_sta *sta, | |
405 | struct iwl_lq_sta *lq_sta, | |
406 | const struct rs_rate *initial_rate); | |
8ca151b5 | 407 | static void rs_stay_in_table(struct iwl_lq_sta *lq_sta, bool force_search); |
8ca151b5 | 408 | |
8ca151b5 JB |
409 | /** |
410 | * The following tables contain the expected throughput metrics for all rates | |
411 | * | |
412 | * 1, 2, 5.5, 11, 6, 9, 12, 18, 24, 36, 48, 54, 60 MBits | |
413 | * | |
414 | * where invalid entries are zeros. | |
415 | * | |
416 | * CCK rates are only valid in legacy table and will only be used in G | |
417 | * (2.4 GHz) band. | |
418 | */ | |
419 | ||
a34529e8 | 420 | static const u16 expected_tpt_legacy[IWL_RATE_COUNT] = { |
4e82dd3a | 421 | 7, 13, 35, 58, 40, 57, 72, 98, 121, 154, 177, 186, 0, 0, 0 |
8ca151b5 JB |
422 | }; |
423 | ||
4e82dd3a ES |
424 | /* Expected TpT tables. 4 indexes: |
425 | * 0 - NGI, 1 - SGI, 2 - AGG+NGI, 3 - AGG+SGI | |
426 | */ | |
a34529e8 | 427 | static const u16 expected_tpt_siso_20MHz[4][IWL_RATE_COUNT] = { |
4e82dd3a ES |
428 | {0, 0, 0, 0, 42, 0, 76, 102, 124, 159, 183, 193, 202, 216, 0}, |
429 | {0, 0, 0, 0, 46, 0, 82, 110, 132, 168, 192, 202, 210, 225, 0}, | |
430 | {0, 0, 0, 0, 49, 0, 97, 145, 192, 285, 375, 420, 464, 551, 0}, | |
431 | {0, 0, 0, 0, 54, 0, 108, 160, 213, 315, 415, 465, 513, 608, 0}, | |
8ca151b5 JB |
432 | }; |
433 | ||
a34529e8 | 434 | static const u16 expected_tpt_siso_40MHz[4][IWL_RATE_COUNT] = { |
4e82dd3a ES |
435 | {0, 0, 0, 0, 77, 0, 127, 160, 184, 220, 242, 250, 257, 269, 275}, |
436 | {0, 0, 0, 0, 83, 0, 135, 169, 193, 229, 250, 257, 264, 275, 280}, | |
437 | {0, 0, 0, 0, 101, 0, 199, 295, 389, 570, 744, 828, 911, 1070, 1173}, | |
438 | {0, 0, 0, 0, 112, 0, 220, 326, 429, 629, 819, 912, 1000, 1173, 1284}, | |
8ca151b5 JB |
439 | }; |
440 | ||
a34529e8 | 441 | static const u16 expected_tpt_siso_80MHz[4][IWL_RATE_COUNT] = { |
d310e405 ES |
442 | {0, 0, 0, 0, 130, 0, 191, 223, 244, 273, 288, 294, 298, 305, 308}, |
443 | {0, 0, 0, 0, 138, 0, 200, 231, 251, 279, 293, 298, 302, 308, 312}, | |
444 | {0, 0, 0, 0, 217, 0, 429, 634, 834, 1220, 1585, 1760, 1931, 2258, 2466}, | |
445 | {0, 0, 0, 0, 241, 0, 475, 701, 921, 1343, 1741, 1931, 2117, 2468, 2691}, | |
446 | }; | |
447 | ||
a34529e8 | 448 | static const u16 expected_tpt_mimo2_20MHz[4][IWL_RATE_COUNT] = { |
4e82dd3a ES |
449 | {0, 0, 0, 0, 74, 0, 123, 155, 179, 213, 235, 243, 250, 261, 0}, |
450 | {0, 0, 0, 0, 81, 0, 131, 164, 187, 221, 242, 250, 256, 267, 0}, | |
451 | {0, 0, 0, 0, 98, 0, 193, 286, 375, 550, 718, 799, 878, 1032, 0}, | |
452 | {0, 0, 0, 0, 109, 0, 214, 316, 414, 607, 790, 879, 965, 1132, 0}, | |
8ca151b5 JB |
453 | }; |
454 | ||
a34529e8 | 455 | static const u16 expected_tpt_mimo2_40MHz[4][IWL_RATE_COUNT] = { |
4e82dd3a ES |
456 | {0, 0, 0, 0, 123, 0, 182, 214, 235, 264, 279, 285, 289, 296, 300}, |
457 | {0, 0, 0, 0, 131, 0, 191, 222, 242, 270, 284, 289, 293, 300, 303}, | |
458 | {0, 0, 0, 0, 200, 0, 390, 571, 741, 1067, 1365, 1505, 1640, 1894, 2053}, | |
459 | {0, 0, 0, 0, 221, 0, 430, 630, 816, 1169, 1490, 1641, 1784, 2053, 2221}, | |
8ca151b5 JB |
460 | }; |
461 | ||
a34529e8 | 462 | static const u16 expected_tpt_mimo2_80MHz[4][IWL_RATE_COUNT] = { |
d310e405 ES |
463 | {0, 0, 0, 0, 182, 0, 240, 264, 278, 299, 308, 311, 313, 317, 319}, |
464 | {0, 0, 0, 0, 190, 0, 247, 269, 282, 302, 310, 313, 315, 319, 320}, | |
465 | {0, 0, 0, 0, 428, 0, 833, 1215, 1577, 2254, 2863, 3147, 3418, 3913, 4219}, | |
466 | {0, 0, 0, 0, 474, 0, 920, 1338, 1732, 2464, 3116, 3418, 3705, 4225, 4545}, | |
467 | }; | |
468 | ||
8ca151b5 JB |
469 | /* mbps, mcs */ |
470 | static const struct iwl_rate_mcs_info iwl_rate_mcs[IWL_RATE_COUNT] = { | |
471 | { "1", "BPSK DSSS"}, | |
472 | { "2", "QPSK DSSS"}, | |
473 | {"5.5", "BPSK CCK"}, | |
474 | { "11", "QPSK CCK"}, | |
475 | { "6", "BPSK 1/2"}, | |
476 | { "9", "BPSK 1/2"}, | |
477 | { "12", "QPSK 1/2"}, | |
478 | { "18", "QPSK 3/4"}, | |
479 | { "24", "16QAM 1/2"}, | |
480 | { "36", "16QAM 3/4"}, | |
481 | { "48", "64QAM 2/3"}, | |
482 | { "54", "64QAM 3/4"}, | |
483 | { "60", "64QAM 5/6"}, | |
484 | }; | |
485 | ||
486 | #define MCS_INDEX_PER_STREAM (8) | |
487 | ||
9d10849e EG |
488 | static const char *rs_pretty_ant(u8 ant) |
489 | { | |
490 | static const char * const ant_name[] = { | |
491 | [ANT_NONE] = "None", | |
492 | [ANT_A] = "A", | |
493 | [ANT_B] = "B", | |
494 | [ANT_AB] = "AB", | |
495 | [ANT_C] = "C", | |
496 | [ANT_AC] = "AC", | |
497 | [ANT_BC] = "BC", | |
498 | [ANT_ABC] = "ABC", | |
499 | }; | |
500 | ||
501 | if (ant > ANT_ABC) | |
502 | return "UNKNOWN"; | |
503 | ||
504 | return ant_name[ant]; | |
505 | } | |
506 | ||
507 | static const char *rs_pretty_lq_type(enum iwl_table_type type) | |
508 | { | |
509 | static const char * const lq_types[] = { | |
510 | [LQ_NONE] = "NONE", | |
511 | [LQ_LEGACY_A] = "LEGACY_A", | |
512 | [LQ_LEGACY_G] = "LEGACY_G", | |
513 | [LQ_HT_SISO] = "HT SISO", | |
514 | [LQ_HT_MIMO2] = "HT MIMO", | |
515 | [LQ_VHT_SISO] = "VHT SISO", | |
516 | [LQ_VHT_MIMO2] = "VHT MIMO", | |
517 | }; | |
518 | ||
519 | if (type < LQ_NONE || type >= LQ_MAX) | |
520 | return "UNKNOWN"; | |
521 | ||
522 | return lq_types[type]; | |
523 | } | |
524 | ||
cc60c6e9 ES |
525 | static char *rs_pretty_rate(const struct rs_rate *rate) |
526 | { | |
527 | static char buf[40]; | |
528 | static const char * const legacy_rates[] = { | |
529 | [IWL_RATE_1M_INDEX] = "1M", | |
530 | [IWL_RATE_2M_INDEX] = "2M", | |
531 | [IWL_RATE_5M_INDEX] = "5.5M", | |
532 | [IWL_RATE_11M_INDEX] = "11M", | |
533 | [IWL_RATE_6M_INDEX] = "6M", | |
534 | [IWL_RATE_9M_INDEX] = "9M", | |
535 | [IWL_RATE_12M_INDEX] = "12M", | |
536 | [IWL_RATE_18M_INDEX] = "18M", | |
537 | [IWL_RATE_24M_INDEX] = "24M", | |
538 | [IWL_RATE_36M_INDEX] = "36M", | |
539 | [IWL_RATE_48M_INDEX] = "48M", | |
540 | [IWL_RATE_54M_INDEX] = "54M", | |
541 | }; | |
542 | static const char *const ht_vht_rates[] = { | |
543 | [IWL_RATE_MCS_0_INDEX] = "MCS0", | |
544 | [IWL_RATE_MCS_1_INDEX] = "MCS1", | |
545 | [IWL_RATE_MCS_2_INDEX] = "MCS2", | |
546 | [IWL_RATE_MCS_3_INDEX] = "MCS3", | |
547 | [IWL_RATE_MCS_4_INDEX] = "MCS4", | |
548 | [IWL_RATE_MCS_5_INDEX] = "MCS5", | |
549 | [IWL_RATE_MCS_6_INDEX] = "MCS6", | |
550 | [IWL_RATE_MCS_7_INDEX] = "MCS7", | |
551 | [IWL_RATE_MCS_8_INDEX] = "MCS8", | |
552 | [IWL_RATE_MCS_9_INDEX] = "MCS9", | |
553 | }; | |
554 | const char *rate_str; | |
555 | ||
e8b3f7b6 | 556 | if (is_type_legacy(rate->type) && (rate->index <= IWL_RATE_54M_INDEX)) |
cc60c6e9 | 557 | rate_str = legacy_rates[rate->index]; |
e8b3f7b6 | 558 | else if ((is_type_ht(rate->type) || is_type_vht(rate->type)) && |
4494541c | 559 | (rate->index >= IWL_RATE_MCS_0_INDEX) && |
e8b3f7b6 | 560 | (rate->index <= IWL_RATE_MCS_9_INDEX)) |
cc60c6e9 ES |
561 | rate_str = ht_vht_rates[rate->index]; |
562 | else | |
563 | rate_str = "BAD_RATE"; | |
564 | ||
565 | sprintf(buf, "(%s|%s|%s)", rs_pretty_lq_type(rate->type), | |
566 | rs_pretty_ant(rate->ant), rate_str); | |
567 | return buf; | |
568 | } | |
569 | ||
5aa33553 ES |
570 | static inline void rs_dump_rate(struct iwl_mvm *mvm, const struct rs_rate *rate, |
571 | const char *prefix) | |
572 | { | |
d8bafeaf | 573 | IWL_DEBUG_RATE(mvm, |
cc60c6e9 ES |
574 | "%s: %s BW: %d SGI: %d LDPC: %d STBC: %d\n", |
575 | prefix, rs_pretty_rate(rate), rate->bw, | |
576 | rate->sgi, rate->ldpc, rate->stbc); | |
5aa33553 ES |
577 | } |
578 | ||
8ca151b5 JB |
579 | static void rs_rate_scale_clear_window(struct iwl_rate_scale_data *window) |
580 | { | |
581 | window->data = 0; | |
582 | window->success_counter = 0; | |
583 | window->success_ratio = IWL_INVALID_VALUE; | |
584 | window->counter = 0; | |
585 | window->average_tpt = IWL_INVALID_VALUE; | |
8ca151b5 JB |
586 | } |
587 | ||
b804eeb6 ES |
588 | static void rs_rate_scale_clear_tbl_windows(struct iwl_mvm *mvm, |
589 | struct iwl_scale_tbl_info *tbl) | |
3ca71f60 EP |
590 | { |
591 | int i; | |
592 | ||
b804eeb6 | 593 | IWL_DEBUG_RATE(mvm, "Clearing up window stats\n"); |
3ca71f60 EP |
594 | for (i = 0; i < IWL_RATE_COUNT; i++) |
595 | rs_rate_scale_clear_window(&tbl->win[i]); | |
2fd647f8 EP |
596 | |
597 | for (i = 0; i < ARRAY_SIZE(tbl->tpc_win); i++) | |
598 | rs_rate_scale_clear_window(&tbl->tpc_win[i]); | |
3ca71f60 EP |
599 | } |
600 | ||
8ca151b5 JB |
601 | static inline u8 rs_is_valid_ant(u8 valid_antenna, u8 ant_type) |
602 | { | |
603 | return (ant_type & valid_antenna) == ant_type; | |
604 | } | |
605 | ||
8ca151b5 | 606 | static int rs_tl_turn_on_agg_for_tid(struct iwl_mvm *mvm, |
40ce5ed1 ES |
607 | struct iwl_lq_sta *lq_data, u8 tid, |
608 | struct ieee80211_sta *sta) | |
8ca151b5 JB |
609 | { |
610 | int ret = -EAGAIN; | |
8ca151b5 | 611 | |
44cc429c EG |
612 | IWL_DEBUG_HT(mvm, "Starting Tx agg: STA: %pM tid: %d\n", |
613 | sta->addr, tid); | |
614 | ret = ieee80211_start_tx_ba_session(sta, tid, 5000); | |
615 | if (ret == -EAGAIN) { | |
616 | /* | |
617 | * driver and mac80211 is out of sync | |
618 | * this might be cause by reloading firmware | |
619 | * stop the tx ba session here | |
620 | */ | |
621 | IWL_ERR(mvm, "Fail start Tx agg on tid: %d\n", | |
622 | tid); | |
623 | ieee80211_stop_tx_ba_session(sta, tid); | |
8ca151b5 JB |
624 | } |
625 | return ret; | |
626 | } | |
627 | ||
628 | static void rs_tl_turn_on_agg(struct iwl_mvm *mvm, u8 tid, | |
629 | struct iwl_lq_sta *lq_data, | |
630 | struct ieee80211_sta *sta) | |
631 | { | |
632 | if (tid < IWL_MAX_TID_COUNT) | |
633 | rs_tl_turn_on_agg_for_tid(mvm, lq_data, tid, sta); | |
634 | else | |
635 | IWL_ERR(mvm, "tid exceeds max TID count: %d/%d\n", | |
636 | tid, IWL_MAX_TID_COUNT); | |
637 | } | |
638 | ||
639 | static inline int get_num_of_ant_from_rate(u32 rate_n_flags) | |
640 | { | |
641 | return !!(rate_n_flags & RATE_MCS_ANT_A_MSK) + | |
642 | !!(rate_n_flags & RATE_MCS_ANT_B_MSK) + | |
643 | !!(rate_n_flags & RATE_MCS_ANT_C_MSK); | |
644 | } | |
645 | ||
646 | /* | |
647 | * Static function to get the expected throughput from an iwl_scale_tbl_info | |
648 | * that wraps a NULL pointer check | |
649 | */ | |
650 | static s32 get_expected_tpt(struct iwl_scale_tbl_info *tbl, int rs_index) | |
651 | { | |
652 | if (tbl->expected_tpt) | |
653 | return tbl->expected_tpt[rs_index]; | |
654 | return 0; | |
655 | } | |
656 | ||
657 | /** | |
658 | * rs_collect_tx_data - Update the success/failure sliding window | |
659 | * | |
660 | * We keep a sliding window of the last 62 packets transmitted | |
661 | * at this rate. window->data contains the bitmask of successful | |
662 | * packets. | |
663 | */ | |
834437da ES |
664 | static int _rs_collect_tx_data(struct iwl_mvm *mvm, |
665 | struct iwl_scale_tbl_info *tbl, | |
0bd3c5a7 EP |
666 | int scale_index, int attempts, int successes, |
667 | struct iwl_rate_scale_data *window) | |
8ca151b5 | 668 | { |
8ca151b5 JB |
669 | static const u64 mask = (((u64)1) << (IWL_RATE_MAX_WINDOW - 1)); |
670 | s32 fail_count, tpt; | |
671 | ||
8ca151b5 JB |
672 | /* Get expected throughput */ |
673 | tpt = get_expected_tpt(tbl, scale_index); | |
674 | ||
675 | /* | |
676 | * Keep track of only the latest 62 tx frame attempts in this rate's | |
677 | * history window; anything older isn't really relevant any more. | |
678 | * If we have filled up the sliding window, drop the oldest attempt; | |
679 | * if the oldest attempt (highest bit in bitmap) shows "success", | |
680 | * subtract "1" from the success counter (this is the main reason | |
681 | * we keep these bitmaps!). | |
682 | */ | |
683 | while (attempts > 0) { | |
684 | if (window->counter >= IWL_RATE_MAX_WINDOW) { | |
685 | /* remove earliest */ | |
686 | window->counter = IWL_RATE_MAX_WINDOW - 1; | |
687 | ||
688 | if (window->data & mask) { | |
689 | window->data &= ~mask; | |
690 | window->success_counter--; | |
691 | } | |
692 | } | |
693 | ||
694 | /* Increment frames-attempted counter */ | |
695 | window->counter++; | |
696 | ||
697 | /* Shift bitmap by one frame to throw away oldest history */ | |
698 | window->data <<= 1; | |
699 | ||
700 | /* Mark the most recent #successes attempts as successful */ | |
701 | if (successes > 0) { | |
702 | window->success_counter++; | |
703 | window->data |= 0x1; | |
704 | successes--; | |
705 | } | |
706 | ||
707 | attempts--; | |
708 | } | |
709 | ||
710 | /* Calculate current success ratio, avoid divide-by-0! */ | |
711 | if (window->counter > 0) | |
712 | window->success_ratio = 128 * (100 * window->success_counter) | |
713 | / window->counter; | |
714 | else | |
715 | window->success_ratio = IWL_INVALID_VALUE; | |
716 | ||
717 | fail_count = window->counter - window->success_counter; | |
718 | ||
719 | /* Calculate average throughput, if we have enough history. */ | |
834437da ES |
720 | if ((fail_count >= IWL_MVM_RS_RATE_MIN_FAILURE_TH) || |
721 | (window->success_counter >= IWL_MVM_RS_RATE_MIN_SUCCESS_TH)) | |
8ca151b5 JB |
722 | window->average_tpt = (window->success_ratio * tpt + 64) / 128; |
723 | else | |
724 | window->average_tpt = IWL_INVALID_VALUE; | |
725 | ||
8ca151b5 JB |
726 | return 0; |
727 | } | |
728 | ||
69c7fda4 GG |
729 | static int rs_collect_tpc_data(struct iwl_mvm *mvm, |
730 | struct iwl_lq_sta *lq_sta, | |
731 | struct iwl_scale_tbl_info *tbl, | |
732 | int scale_index, int attempts, int successes, | |
733 | u8 reduced_txp) | |
734 | { | |
735 | struct iwl_rate_scale_data *window = NULL; | |
736 | ||
737 | if (WARN_ON_ONCE(reduced_txp > TPC_MAX_REDUCTION)) | |
738 | return -EINVAL; | |
739 | ||
740 | window = &tbl->tpc_win[reduced_txp]; | |
741 | return _rs_collect_tx_data(mvm, tbl, scale_index, attempts, successes, | |
742 | window); | |
743 | } | |
744 | ||
745 | static int rs_collect_tlc_data(struct iwl_mvm *mvm, | |
746 | struct iwl_lq_sta *lq_sta, | |
747 | struct iwl_scale_tbl_info *tbl, | |
748 | int scale_index, int attempts, int successes) | |
0bd3c5a7 EP |
749 | { |
750 | struct iwl_rate_scale_data *window = NULL; | |
751 | ||
752 | if (scale_index < 0 || scale_index >= IWL_RATE_COUNT) | |
753 | return -EINVAL; | |
754 | ||
757cf23b | 755 | if (tbl->column != RS_COLUMN_INVALID) { |
f58220f6 ES |
756 | struct lq_sta_pers *pers = &lq_sta->pers; |
757 | ||
758 | pers->tx_stats[tbl->column][scale_index].total += attempts; | |
759 | pers->tx_stats[tbl->column][scale_index].success += successes; | |
757cf23b ES |
760 | } |
761 | ||
0bd3c5a7 EP |
762 | /* Select window for current tx bit rate */ |
763 | window = &(tbl->win[scale_index]); | |
834437da | 764 | return _rs_collect_tx_data(mvm, tbl, scale_index, attempts, successes, |
0bd3c5a7 EP |
765 | window); |
766 | } | |
767 | ||
5aa33553 ES |
768 | /* Convert rs_rate object into ucode rate bitmask */ |
769 | static u32 ucode_rate_from_rs_rate(struct iwl_mvm *mvm, | |
8fc7c58c | 770 | struct rs_rate *rate) |
8ca151b5 | 771 | { |
5aa33553 ES |
772 | u32 ucode_rate = 0; |
773 | int index = rate->index; | |
8ca151b5 | 774 | |
5aa33553 | 775 | ucode_rate |= ((rate->ant << RATE_MCS_ANT_POS) & |
d310e405 ES |
776 | RATE_MCS_ANT_ABC_MSK); |
777 | ||
5aa33553 ES |
778 | if (is_legacy(rate)) { |
779 | ucode_rate |= iwl_rates[index].plcp; | |
8ca151b5 | 780 | if (index >= IWL_FIRST_CCK_RATE && index <= IWL_LAST_CCK_RATE) |
5aa33553 ES |
781 | ucode_rate |= RATE_MCS_CCK_MSK; |
782 | return ucode_rate; | |
d310e405 ES |
783 | } |
784 | ||
5aa33553 | 785 | if (is_ht(rate)) { |
d310e405 | 786 | if (index < IWL_FIRST_HT_RATE || index > IWL_LAST_HT_RATE) { |
8ca151b5 | 787 | IWL_ERR(mvm, "Invalid HT rate index %d\n", index); |
4e82dd3a | 788 | index = IWL_LAST_HT_RATE; |
8ca151b5 | 789 | } |
5aa33553 | 790 | ucode_rate |= RATE_MCS_HT_MSK; |
8ca151b5 | 791 | |
5aa33553 ES |
792 | if (is_ht_siso(rate)) |
793 | ucode_rate |= iwl_rates[index].plcp_ht_siso; | |
794 | else if (is_ht_mimo2(rate)) | |
795 | ucode_rate |= iwl_rates[index].plcp_ht_mimo2; | |
8ca151b5 | 796 | else |
d972ab31 | 797 | WARN_ON_ONCE(1); |
5aa33553 | 798 | } else if (is_vht(rate)) { |
d310e405 ES |
799 | if (index < IWL_FIRST_VHT_RATE || index > IWL_LAST_VHT_RATE) { |
800 | IWL_ERR(mvm, "Invalid VHT rate index %d\n", index); | |
801 | index = IWL_LAST_VHT_RATE; | |
802 | } | |
5aa33553 ES |
803 | ucode_rate |= RATE_MCS_VHT_MSK; |
804 | if (is_vht_siso(rate)) | |
805 | ucode_rate |= iwl_rates[index].plcp_vht_siso; | |
806 | else if (is_vht_mimo2(rate)) | |
807 | ucode_rate |= iwl_rates[index].plcp_vht_mimo2; | |
d310e405 ES |
808 | else |
809 | WARN_ON_ONCE(1); | |
810 | ||
8ca151b5 | 811 | } else { |
5aa33553 | 812 | IWL_ERR(mvm, "Invalid rate->type %d\n", rate->type); |
8ca151b5 JB |
813 | } |
814 | ||
d8bafeaf ES |
815 | if (is_siso(rate) && rate->stbc) { |
816 | /* To enable STBC we need to set both a flag and ANT_AB */ | |
817 | ucode_rate |= RATE_MCS_ANT_AB_MSK; | |
818 | ucode_rate |= RATE_MCS_VHT_STBC_MSK; | |
819 | } | |
820 | ||
5aa33553 ES |
821 | ucode_rate |= rate->bw; |
822 | if (rate->sgi) | |
823 | ucode_rate |= RATE_MCS_SGI_MSK; | |
a3576ff2 ES |
824 | if (rate->ldpc) |
825 | ucode_rate |= RATE_MCS_LDPC_MSK; | |
d310e405 | 826 | |
5aa33553 | 827 | return ucode_rate; |
8ca151b5 JB |
828 | } |
829 | ||
5aa33553 ES |
830 | /* Convert a ucode rate into an rs_rate object */ |
831 | static int rs_rate_from_ucode_rate(const u32 ucode_rate, | |
832 | enum ieee80211_band band, | |
833 | struct rs_rate *rate) | |
8ca151b5 | 834 | { |
5aa33553 ES |
835 | u32 ant_msk = ucode_rate & RATE_MCS_ANT_ABC_MSK; |
836 | u8 num_of_ant = get_num_of_ant_from_rate(ucode_rate); | |
d310e405 | 837 | u8 nss; |
8ca151b5 | 838 | |
9e898f1b | 839 | memset(rate, 0, sizeof(*rate)); |
5aa33553 | 840 | rate->index = iwl_hwrate_to_plcp_idx(ucode_rate); |
8ca151b5 | 841 | |
560843f4 | 842 | if (rate->index == IWL_RATE_INVALID) |
8ca151b5 | 843 | return -EINVAL; |
5aa33553 ES |
844 | |
845 | rate->ant = (ant_msk >> RATE_MCS_ANT_POS); | |
8ca151b5 | 846 | |
d310e405 | 847 | /* Legacy */ |
5aa33553 ES |
848 | if (!(ucode_rate & RATE_MCS_HT_MSK) && |
849 | !(ucode_rate & RATE_MCS_VHT_MSK)) { | |
8ca151b5 JB |
850 | if (num_of_ant == 1) { |
851 | if (band == IEEE80211_BAND_5GHZ) | |
5aa33553 | 852 | rate->type = LQ_LEGACY_A; |
8ca151b5 | 853 | else |
5aa33553 | 854 | rate->type = LQ_LEGACY_G; |
8ca151b5 | 855 | } |
d310e405 ES |
856 | |
857 | return 0; | |
858 | } | |
859 | ||
860 | /* HT or VHT */ | |
5aa33553 ES |
861 | if (ucode_rate & RATE_MCS_SGI_MSK) |
862 | rate->sgi = true; | |
a3576ff2 ES |
863 | if (ucode_rate & RATE_MCS_LDPC_MSK) |
864 | rate->ldpc = true; | |
d8bafeaf ES |
865 | if (ucode_rate & RATE_MCS_VHT_STBC_MSK) |
866 | rate->stbc = true; | |
ba69d0e3 ES |
867 | if (ucode_rate & RATE_MCS_BF_MSK) |
868 | rate->bfer = true; | |
d310e405 | 869 | |
5aa33553 | 870 | rate->bw = ucode_rate & RATE_MCS_CHAN_WIDTH_MSK; |
d310e405 | 871 | |
5aa33553 ES |
872 | if (ucode_rate & RATE_MCS_HT_MSK) { |
873 | nss = ((ucode_rate & RATE_HT_MCS_NSS_MSK) >> | |
d310e405 ES |
874 | RATE_HT_MCS_NSS_POS) + 1; |
875 | ||
876 | if (nss == 1) { | |
5aa33553 | 877 | rate->type = LQ_HT_SISO; |
ba69d0e3 ES |
878 | WARN_ONCE(!rate->stbc && !rate->bfer && num_of_ant != 1, |
879 | "stbc %d bfer %d", | |
880 | rate->stbc, rate->bfer); | |
d310e405 | 881 | } else if (nss == 2) { |
5aa33553 | 882 | rate->type = LQ_HT_MIMO2; |
d310e405 | 883 | WARN_ON_ONCE(num_of_ant != 2); |
8ca151b5 | 884 | } else { |
d310e405 ES |
885 | WARN_ON_ONCE(1); |
886 | } | |
5aa33553 ES |
887 | } else if (ucode_rate & RATE_MCS_VHT_MSK) { |
888 | nss = ((ucode_rate & RATE_VHT_MCS_NSS_MSK) >> | |
d310e405 ES |
889 | RATE_VHT_MCS_NSS_POS) + 1; |
890 | ||
891 | if (nss == 1) { | |
5aa33553 | 892 | rate->type = LQ_VHT_SISO; |
ba69d0e3 ES |
893 | WARN_ONCE(!rate->stbc && !rate->bfer && num_of_ant != 1, |
894 | "stbc %d bfer %d", | |
895 | rate->stbc, rate->bfer); | |
d310e405 | 896 | } else if (nss == 2) { |
5aa33553 | 897 | rate->type = LQ_VHT_MIMO2; |
d310e405 ES |
898 | WARN_ON_ONCE(num_of_ant != 2); |
899 | } else { | |
900 | WARN_ON_ONCE(1); | |
8ca151b5 JB |
901 | } |
902 | } | |
d310e405 | 903 | |
5aa33553 ES |
904 | WARN_ON_ONCE(rate->bw == RATE_MCS_CHAN_WIDTH_160); |
905 | WARN_ON_ONCE(rate->bw == RATE_MCS_CHAN_WIDTH_80 && | |
906 | !is_vht(rate)); | |
d310e405 | 907 | |
8ca151b5 JB |
908 | return 0; |
909 | } | |
910 | ||
911 | /* switch to another antenna/antennas and return 1 */ | |
912 | /* if no other valid antenna found, return 0 */ | |
8fc7c58c | 913 | static int rs_toggle_antenna(u32 valid_ant, struct rs_rate *rate) |
8ca151b5 JB |
914 | { |
915 | u8 new_ant_type; | |
916 | ||
5aa33553 | 917 | if (!rate->ant || rate->ant > ANT_ABC) |
8ca151b5 JB |
918 | return 0; |
919 | ||
5aa33553 | 920 | if (!rs_is_valid_ant(valid_ant, rate->ant)) |
8ca151b5 JB |
921 | return 0; |
922 | ||
5aa33553 | 923 | new_ant_type = ant_toggle_lookup[rate->ant]; |
8ca151b5 | 924 | |
5aa33553 | 925 | while ((new_ant_type != rate->ant) && |
8ca151b5 JB |
926 | !rs_is_valid_ant(valid_ant, new_ant_type)) |
927 | new_ant_type = ant_toggle_lookup[new_ant_type]; | |
928 | ||
5aa33553 | 929 | if (new_ant_type == rate->ant) |
8ca151b5 JB |
930 | return 0; |
931 | ||
5aa33553 ES |
932 | rate->ant = new_ant_type; |
933 | ||
8ca151b5 JB |
934 | return 1; |
935 | } | |
936 | ||
8ca151b5 | 937 | static u16 rs_get_supported_rates(struct iwl_lq_sta *lq_sta, |
5aa33553 | 938 | struct rs_rate *rate) |
8ca151b5 | 939 | { |
5aa33553 | 940 | if (is_legacy(rate)) |
8ca151b5 | 941 | return lq_sta->active_legacy_rate; |
5aa33553 | 942 | else if (is_siso(rate)) |
d310e405 | 943 | return lq_sta->active_siso_rate; |
5aa33553 | 944 | else if (is_mimo2(rate)) |
d310e405 ES |
945 | return lq_sta->active_mimo2_rate; |
946 | ||
947 | WARN_ON_ONCE(1); | |
948 | return 0; | |
8ca151b5 JB |
949 | } |
950 | ||
951 | static u16 rs_get_adjacent_rate(struct iwl_mvm *mvm, u8 index, u16 rate_mask, | |
952 | int rate_type) | |
953 | { | |
954 | u8 high = IWL_RATE_INVALID; | |
955 | u8 low = IWL_RATE_INVALID; | |
956 | ||
957 | /* 802.11A or ht walks to the next literal adjacent rate in | |
958 | * the rate table */ | |
5aa33553 | 959 | if (is_type_a_band(rate_type) || !is_type_legacy(rate_type)) { |
8ca151b5 JB |
960 | int i; |
961 | u32 mask; | |
962 | ||
963 | /* Find the previous rate that is in the rate mask */ | |
964 | i = index - 1; | |
965 | for (mask = (1 << i); i >= 0; i--, mask >>= 1) { | |
966 | if (rate_mask & mask) { | |
967 | low = i; | |
968 | break; | |
969 | } | |
970 | } | |
971 | ||
972 | /* Find the next rate that is in the rate mask */ | |
973 | i = index + 1; | |
974 | for (mask = (1 << i); i < IWL_RATE_COUNT; i++, mask <<= 1) { | |
975 | if (rate_mask & mask) { | |
976 | high = i; | |
977 | break; | |
978 | } | |
979 | } | |
980 | ||
981 | return (high << 8) | low; | |
982 | } | |
983 | ||
984 | low = index; | |
985 | while (low != IWL_RATE_INVALID) { | |
986 | low = iwl_rates[low].prev_rs; | |
987 | if (low == IWL_RATE_INVALID) | |
988 | break; | |
989 | if (rate_mask & (1 << low)) | |
990 | break; | |
8ca151b5 JB |
991 | } |
992 | ||
993 | high = index; | |
994 | while (high != IWL_RATE_INVALID) { | |
995 | high = iwl_rates[high].next_rs; | |
996 | if (high == IWL_RATE_INVALID) | |
997 | break; | |
998 | if (rate_mask & (1 << high)) | |
999 | break; | |
8ca151b5 JB |
1000 | } |
1001 | ||
1002 | return (high << 8) | low; | |
1003 | } | |
1004 | ||
e07be6d3 ES |
1005 | static inline bool rs_rate_supported(struct iwl_lq_sta *lq_sta, |
1006 | struct rs_rate *rate) | |
8ca151b5 | 1007 | { |
e07be6d3 ES |
1008 | return BIT(rate->index) & rs_get_supported_rates(lq_sta, rate); |
1009 | } | |
1010 | ||
1011 | /* Get the next supported lower rate in the current column. | |
1012 | * Return true if bottom rate in the current column was reached | |
1013 | */ | |
1014 | static bool rs_get_lower_rate_in_column(struct iwl_lq_sta *lq_sta, | |
1015 | struct rs_rate *rate) | |
1016 | { | |
1017 | u8 low; | |
8ca151b5 | 1018 | u16 high_low; |
e07be6d3 | 1019 | u16 rate_mask; |
ae969afe | 1020 | struct iwl_mvm *mvm = lq_sta->pers.drv; |
e07be6d3 ES |
1021 | |
1022 | rate_mask = rs_get_supported_rates(lq_sta, rate); | |
1023 | high_low = rs_get_adjacent_rate(mvm, rate->index, rate_mask, | |
1024 | rate->type); | |
1025 | low = high_low & 0xff; | |
1026 | ||
1027 | /* Bottom rate of column reached */ | |
1028 | if (low == IWL_RATE_INVALID) | |
1029 | return true; | |
1030 | ||
1031 | rate->index = low; | |
1032 | return false; | |
1033 | } | |
1034 | ||
1035 | /* Get the next rate to use following a column downgrade */ | |
1036 | static void rs_get_lower_rate_down_column(struct iwl_lq_sta *lq_sta, | |
1037 | struct rs_rate *rate) | |
1038 | { | |
ae969afe | 1039 | struct iwl_mvm *mvm = lq_sta->pers.drv; |
8ca151b5 | 1040 | |
e07be6d3 ES |
1041 | if (is_legacy(rate)) { |
1042 | /* No column to downgrade from Legacy */ | |
1043 | return; | |
1044 | } else if (is_siso(rate)) { | |
1045 | /* Downgrade to Legacy if we were in SISO */ | |
8ca151b5 | 1046 | if (lq_sta->band == IEEE80211_BAND_5GHZ) |
5aa33553 | 1047 | rate->type = LQ_LEGACY_A; |
8ca151b5 | 1048 | else |
5aa33553 | 1049 | rate->type = LQ_LEGACY_G; |
8ca151b5 | 1050 | |
a56db7d1 | 1051 | rate->bw = RATE_MCS_CHAN_WIDTH_20; |
8ca151b5 | 1052 | |
b800040d | 1053 | WARN_ON_ONCE(rate->index < IWL_RATE_MCS_0_INDEX || |
e07be6d3 | 1054 | rate->index > IWL_RATE_MCS_9_INDEX); |
8ca151b5 | 1055 | |
e07be6d3 | 1056 | rate->index = rs_ht_to_legacy[rate->index]; |
a3576ff2 | 1057 | rate->ldpc = false; |
e07be6d3 ES |
1058 | } else { |
1059 | /* Downgrade to SISO with same MCS if in MIMO */ | |
1060 | rate->type = is_vht_mimo2(rate) ? | |
1061 | LQ_VHT_SISO : LQ_HT_SISO; | |
8ca151b5 JB |
1062 | } |
1063 | ||
e07be6d3 | 1064 | if (num_of_ant(rate->ant) > 1) |
a0544272 | 1065 | rate->ant = first_antenna(iwl_mvm_get_valid_tx_ant(mvm)); |
8ca151b5 | 1066 | |
e07be6d3 ES |
1067 | /* Relevant in both switching to SISO or Legacy */ |
1068 | rate->sgi = false; | |
1069 | ||
1070 | if (!rs_rate_supported(lq_sta, rate)) | |
1071 | rs_get_lower_rate_in_column(lq_sta, rate); | |
8ca151b5 JB |
1072 | } |
1073 | ||
ba69d0e3 ES |
1074 | /* Check if both rates are identical |
1075 | * allow_ant_mismatch enables matching a SISO rate on ANT_A or ANT_B | |
1076 | * with a rate indicating STBC/BFER and ANT_AB. | |
1077 | */ | |
929e6ede | 1078 | static inline bool rs_rate_equal(struct rs_rate *a, |
ba69d0e3 ES |
1079 | struct rs_rate *b, |
1080 | bool allow_ant_mismatch) | |
1081 | ||
929e6ede | 1082 | { |
ba69d0e3 ES |
1083 | bool ant_match = (a->ant == b->ant) && (a->stbc == b->stbc) && |
1084 | (a->bfer == b->bfer); | |
1085 | ||
1086 | if (allow_ant_mismatch) { | |
1087 | if (a->stbc || a->bfer) { | |
1088 | WARN_ONCE(a->ant != ANT_AB, "stbc %d bfer %d ant %d", | |
1089 | a->stbc, a->bfer, a->ant); | |
1090 | ant_match |= (b->ant == ANT_A || b->ant == ANT_B); | |
1091 | } else if (b->stbc || b->bfer) { | |
1092 | WARN_ONCE(b->ant != ANT_AB, "stbc %d bfer %d ant %d", | |
1093 | b->stbc, b->bfer, b->ant); | |
1094 | ant_match |= (a->ant == ANT_A || a->ant == ANT_B); | |
1095 | } | |
1096 | } | |
1097 | ||
929e6ede | 1098 | return (a->type == b->type) && (a->bw == b->bw) && (a->sgi == b->sgi) && |
ba69d0e3 | 1099 | (a->ldpc == b->ldpc) && (a->index == b->index) && ant_match; |
929e6ede ES |
1100 | } |
1101 | ||
1102 | /* Check if both rates share the same column */ | |
1103 | static inline bool rs_rate_column_match(struct rs_rate *a, | |
1104 | struct rs_rate *b) | |
8ca151b5 | 1105 | { |
d8bafeaf ES |
1106 | bool ant_match; |
1107 | ||
ba69d0e3 | 1108 | if (a->stbc || a->bfer) |
d8bafeaf ES |
1109 | ant_match = (b->ant == ANT_A || b->ant == ANT_B); |
1110 | else | |
1111 | ant_match = (a->ant == b->ant); | |
1112 | ||
1113 | return (a->type == b->type) && (a->bw == b->bw) && (a->sgi == b->sgi) | |
1114 | && ant_match; | |
8ca151b5 JB |
1115 | } |
1116 | ||
ad82d8a5 ES |
1117 | static inline enum rs_column rs_get_column_from_rate(struct rs_rate *rate) |
1118 | { | |
1119 | if (is_legacy(rate)) { | |
1120 | if (rate->ant == ANT_A) | |
1121 | return RS_COLUMN_LEGACY_ANT_A; | |
1122 | ||
1123 | if (rate->ant == ANT_B) | |
1124 | return RS_COLUMN_LEGACY_ANT_B; | |
1125 | ||
1126 | goto err; | |
1127 | } | |
1128 | ||
1129 | if (is_siso(rate)) { | |
1130 | if (rate->ant == ANT_A || rate->stbc || rate->bfer) | |
1131 | return rate->sgi ? RS_COLUMN_SISO_ANT_A_SGI : | |
1132 | RS_COLUMN_SISO_ANT_A; | |
1133 | ||
1134 | if (rate->ant == ANT_B) | |
1135 | return rate->sgi ? RS_COLUMN_SISO_ANT_B_SGI : | |
1136 | RS_COLUMN_SISO_ANT_B; | |
1137 | ||
1138 | goto err; | |
1139 | } | |
1140 | ||
1141 | if (is_mimo(rate)) | |
1142 | return rate->sgi ? RS_COLUMN_MIMO2_SGI : RS_COLUMN_MIMO2; | |
1143 | ||
1144 | err: | |
1145 | return RS_COLUMN_INVALID; | |
1146 | } | |
1147 | ||
1ebc8f2e ES |
1148 | static u8 rs_get_tid(struct ieee80211_hdr *hdr) |
1149 | { | |
1150 | u8 tid = IWL_MAX_TID_COUNT; | |
1151 | ||
1152 | if (ieee80211_is_data_qos(hdr->frame_control)) { | |
1153 | u8 *qc = ieee80211_get_qos_ctl(hdr); | |
1154 | tid = qc[0] & 0xf; | |
1155 | } | |
1156 | ||
1157 | if (unlikely(tid > IWL_MAX_TID_COUNT)) | |
1158 | tid = IWL_MAX_TID_COUNT; | |
1159 | ||
1160 | return tid; | |
1161 | } | |
1162 | ||
1163 | void iwl_mvm_rs_tx_status(struct iwl_mvm *mvm, struct ieee80211_sta *sta, | |
1164 | int tid, struct ieee80211_tx_info *info) | |
8ca151b5 JB |
1165 | { |
1166 | int legacy_success; | |
1167 | int retries; | |
929e6ede | 1168 | int i; |
8ca151b5 | 1169 | struct iwl_lq_cmd *table; |
929e6ede ES |
1170 | u32 lq_hwrate; |
1171 | struct rs_rate lq_rate, tx_resp_rate; | |
8ca151b5 | 1172 | struct iwl_scale_tbl_info *curr_tbl, *other_tbl, *tmp_tbl; |
2fd647f8 | 1173 | u8 reduced_txp = (uintptr_t)info->status.status_driver_data[0]; |
929e6ede | 1174 | u32 tx_resp_hwrate = (uintptr_t)info->status.status_driver_data[1]; |
1ebc8f2e ES |
1175 | struct iwl_mvm_sta *mvmsta = iwl_mvm_sta_from_mac80211(sta); |
1176 | struct iwl_lq_sta *lq_sta = &mvmsta->lq_sta; | |
859d914c JB |
1177 | bool allow_ant_mismatch = fw_has_api(&mvm->fw->ucode_capa, |
1178 | IWL_UCODE_TLV_API_LQ_SS_PARAMS); | |
8ca151b5 | 1179 | |
8ca151b5 JB |
1180 | /* Treat uninitialized rate scaling data same as non-existing. */ |
1181 | if (!lq_sta) { | |
1182 | IWL_DEBUG_RATE(mvm, "Station rate scaling not created yet.\n"); | |
1183 | return; | |
ae969afe | 1184 | } else if (!lq_sta->pers.drv) { |
8ca151b5 JB |
1185 | IWL_DEBUG_RATE(mvm, "Rate scaling not initialized yet.\n"); |
1186 | return; | |
1187 | } | |
1188 | ||
ad82d8a5 ES |
1189 | /* This packet was aggregated but doesn't carry status info */ |
1190 | if ((info->flags & IEEE80211_TX_CTL_AMPDU) && | |
1191 | !(info->flags & IEEE80211_TX_STAT_AMPDU)) | |
1192 | return; | |
1193 | ||
1194 | rs_rate_from_ucode_rate(tx_resp_hwrate, info->band, &tx_resp_rate); | |
1195 | ||
8e96440e | 1196 | #ifdef CONFIG_MAC80211_DEBUGFS |
ad82d8a5 ES |
1197 | /* Disable last tx check if we are debugging with fixed rate but |
1198 | * update tx stats */ | |
ae969afe | 1199 | if (lq_sta->pers.dbg_fixed_rate) { |
ad82d8a5 ES |
1200 | int index = tx_resp_rate.index; |
1201 | enum rs_column column; | |
1202 | int attempts, success; | |
1203 | ||
1204 | column = rs_get_column_from_rate(&tx_resp_rate); | |
1205 | if (WARN_ONCE(column == RS_COLUMN_INVALID, | |
1206 | "Can't map rate 0x%x to column", | |
1207 | tx_resp_hwrate)) | |
1208 | return; | |
1209 | ||
1210 | if (info->flags & IEEE80211_TX_STAT_AMPDU) { | |
1211 | attempts = info->status.ampdu_len; | |
1212 | success = info->status.ampdu_ack_len; | |
1213 | } else { | |
1214 | attempts = info->status.rates[0].count; | |
1215 | success = !!(info->flags & IEEE80211_TX_STAT_ACK); | |
1216 | } | |
1217 | ||
1218 | lq_sta->pers.tx_stats[column][index].total += attempts; | |
1219 | lq_sta->pers.tx_stats[column][index].success += success; | |
1220 | ||
1221 | IWL_DEBUG_RATE(mvm, "Fixed rate 0x%x success %d attempts %d\n", | |
1222 | tx_resp_hwrate, success, attempts); | |
87d5e415 ES |
1223 | return; |
1224 | } | |
1225 | #endif | |
8ca151b5 | 1226 | |
87d5e415 | 1227 | if (time_after(jiffies, |
834437da ES |
1228 | (unsigned long)(lq_sta->last_tx + |
1229 | (IWL_MVM_RS_IDLE_TIMEOUT * HZ)))) { | |
efad21d2 JB |
1230 | int t; |
1231 | ||
87d5e415 | 1232 | IWL_DEBUG_RATE(mvm, "Tx idle for too long. reinit rs\n"); |
efad21d2 JB |
1233 | for (t = 0; t < IWL_MAX_TID_COUNT; t++) |
1234 | ieee80211_stop_tx_ba_session(sta, t); | |
87d5e415 | 1235 | |
1ebc8f2e | 1236 | iwl_mvm_rs_rate_init(mvm, sta, info->band, false); |
87d5e415 ES |
1237 | return; |
1238 | } | |
1239 | lq_sta->last_tx = jiffies; | |
1240 | ||
929e6ede ES |
1241 | /* Ignore this Tx frame response if its initial rate doesn't match |
1242 | * that of latest Link Quality command. There may be stragglers | |
1243 | * from a previous Link Quality command, but we're no longer interested | |
1244 | * in those; they're either from the "active" mode while we're trying | |
1245 | * to check "search" mode, or a prior "search" mode after we've moved | |
1246 | * to a new "search" mode (which might become the new "active" mode). | |
1247 | */ | |
1248 | table = &lq_sta->lq; | |
1249 | lq_hwrate = le32_to_cpu(table->rs_table[0]); | |
1250 | rs_rate_from_ucode_rate(lq_hwrate, info->band, &lq_rate); | |
929e6ede | 1251 | |
8ca151b5 | 1252 | /* Here we actually compare this rate to the latest LQ command */ |
ba69d0e3 | 1253 | if (!rs_rate_equal(&tx_resp_rate, &lq_rate, allow_ant_mismatch)) { |
8ca151b5 | 1254 | IWL_DEBUG_RATE(mvm, |
929e6ede ES |
1255 | "initial tx resp rate 0x%x does not match 0x%x\n", |
1256 | tx_resp_hwrate, lq_hwrate); | |
1257 | ||
8ca151b5 JB |
1258 | /* |
1259 | * Since rates mis-match, the last LQ command may have failed. | |
1260 | * After IWL_MISSED_RATE_MAX mis-matches, resync the uCode with | |
1261 | * ... driver. | |
1262 | */ | |
1263 | lq_sta->missed_rate_counter++; | |
834437da | 1264 | if (lq_sta->missed_rate_counter > IWL_MVM_RS_MISSED_RATE_MAX) { |
8ca151b5 | 1265 | lq_sta->missed_rate_counter = 0; |
b3b06a32 ES |
1266 | IWL_DEBUG_RATE(mvm, |
1267 | "Too many rates mismatch. Send sync LQ. rs_state %d\n", | |
1268 | lq_sta->rs_state); | |
9e680946 | 1269 | iwl_mvm_send_lq_cmd(mvm, &lq_sta->lq, false); |
8ca151b5 JB |
1270 | } |
1271 | /* Regardless, ignore this status info for outdated rate */ | |
1272 | return; | |
1273 | } else | |
1274 | /* Rate did match, so reset the missed_rate_counter */ | |
1275 | lq_sta->missed_rate_counter = 0; | |
1276 | ||
26a2cc01 | 1277 | if (!lq_sta->search_better_tbl) { |
8ca151b5 JB |
1278 | curr_tbl = &(lq_sta->lq_info[lq_sta->active_tbl]); |
1279 | other_tbl = &(lq_sta->lq_info[1 - lq_sta->active_tbl]); | |
26a2cc01 | 1280 | } else { |
8ca151b5 JB |
1281 | curr_tbl = &(lq_sta->lq_info[1 - lq_sta->active_tbl]); |
1282 | other_tbl = &(lq_sta->lq_info[lq_sta->active_tbl]); | |
26a2cc01 ES |
1283 | } |
1284 | ||
929e6ede | 1285 | if (WARN_ON_ONCE(!rs_rate_column_match(&lq_rate, &curr_tbl->rate))) { |
8ca151b5 JB |
1286 | IWL_DEBUG_RATE(mvm, |
1287 | "Neither active nor search matches tx rate\n"); | |
1288 | tmp_tbl = &(lq_sta->lq_info[lq_sta->active_tbl]); | |
5aa33553 | 1289 | rs_dump_rate(mvm, &tmp_tbl->rate, "ACTIVE"); |
8ca151b5 | 1290 | tmp_tbl = &(lq_sta->lq_info[1 - lq_sta->active_tbl]); |
5aa33553 | 1291 | rs_dump_rate(mvm, &tmp_tbl->rate, "SEARCH"); |
929e6ede | 1292 | rs_dump_rate(mvm, &lq_rate, "ACTUAL"); |
5aa33553 | 1293 | |
8ca151b5 JB |
1294 | /* |
1295 | * no matching table found, let's by-pass the data collection | |
1296 | * and continue to perform rate scale to find the rate table | |
1297 | */ | |
1298 | rs_stay_in_table(lq_sta, true); | |
1299 | goto done; | |
1300 | } | |
1301 | ||
1302 | /* | |
1303 | * Updating the frame history depends on whether packets were | |
1304 | * aggregated. | |
1305 | * | |
1306 | * For aggregation, all packets were transmitted at the same rate, the | |
1307 | * first index into rate scale table. | |
1308 | */ | |
1309 | if (info->flags & IEEE80211_TX_STAT_AMPDU) { | |
69c7fda4 GG |
1310 | rs_collect_tpc_data(mvm, lq_sta, curr_tbl, lq_rate.index, |
1311 | info->status.ampdu_len, | |
1312 | info->status.ampdu_ack_len, | |
1313 | reduced_txp); | |
1314 | ||
1315 | /* ampdu_ack_len = 0 marks no BA was received. For TLC, treat | |
1316 | * it as a single frame loss as we don't want the success ratio | |
1317 | * to dip too quickly because a BA wasn't received. | |
1318 | * For TPC, there's no need for this optimisation since we want | |
1319 | * to recover very quickly from a bad power reduction and, | |
1320 | * therefore we'd like the success ratio to get an immediate hit | |
1321 | * when failing to get a BA, so we'd switch back to a lower or | |
1322 | * zero power reduction. When FW transmits agg with a rate | |
1323 | * different from the initial rate, it will not use reduced txp | |
1324 | * and will send BA notification twice (one empty with reduced | |
1325 | * txp equal to the value from LQ and one with reduced txp 0). | |
1326 | * We need to update counters for each txp level accordingly. | |
d6bda667 ES |
1327 | */ |
1328 | if (info->status.ampdu_ack_len == 0) | |
1329 | info->status.ampdu_len = 1; | |
1330 | ||
69c7fda4 GG |
1331 | rs_collect_tlc_data(mvm, lq_sta, curr_tbl, lq_rate.index, |
1332 | info->status.ampdu_len, | |
1333 | info->status.ampdu_ack_len); | |
8ca151b5 JB |
1334 | |
1335 | /* Update success/fail counts if not searching for new mode */ | |
b3b06a32 | 1336 | if (lq_sta->rs_state == RS_STATE_STAY_IN_COLUMN) { |
8ca151b5 JB |
1337 | lq_sta->total_success += info->status.ampdu_ack_len; |
1338 | lq_sta->total_failed += (info->status.ampdu_len - | |
1339 | info->status.ampdu_ack_len); | |
1340 | } | |
1341 | } else { | |
90cb1237 | 1342 | /* For legacy, update frame history with for each Tx retry. */ |
8ca151b5 JB |
1343 | retries = info->status.rates[0].count - 1; |
1344 | /* HW doesn't send more than 15 retries */ | |
1345 | retries = min(retries, 15); | |
1346 | ||
1347 | /* The last transmission may have been successful */ | |
1348 | legacy_success = !!(info->flags & IEEE80211_TX_STAT_ACK); | |
1349 | /* Collect data for each rate used during failed TX attempts */ | |
1350 | for (i = 0; i <= retries; ++i) { | |
929e6ede ES |
1351 | lq_hwrate = le32_to_cpu(table->rs_table[i]); |
1352 | rs_rate_from_ucode_rate(lq_hwrate, info->band, | |
1353 | &lq_rate); | |
8ca151b5 JB |
1354 | /* |
1355 | * Only collect stats if retried rate is in the same RS | |
1356 | * table as active/search. | |
1357 | */ | |
929e6ede | 1358 | if (rs_rate_column_match(&lq_rate, &curr_tbl->rate)) |
8ca151b5 | 1359 | tmp_tbl = curr_tbl; |
929e6ede ES |
1360 | else if (rs_rate_column_match(&lq_rate, |
1361 | &other_tbl->rate)) | |
8ca151b5 | 1362 | tmp_tbl = other_tbl; |
4107dbd2 | 1363 | else |
8ca151b5 | 1364 | continue; |
4107dbd2 | 1365 | |
69c7fda4 GG |
1366 | rs_collect_tpc_data(mvm, lq_sta, tmp_tbl, |
1367 | lq_rate.index, 1, | |
1368 | i < retries ? 0 : legacy_success, | |
1369 | reduced_txp); | |
1370 | rs_collect_tlc_data(mvm, lq_sta, tmp_tbl, | |
1371 | lq_rate.index, 1, | |
1372 | i < retries ? 0 : legacy_success); | |
8ca151b5 JB |
1373 | } |
1374 | ||
1375 | /* Update success/fail counts if not searching for new mode */ | |
b3b06a32 | 1376 | if (lq_sta->rs_state == RS_STATE_STAY_IN_COLUMN) { |
8ca151b5 JB |
1377 | lq_sta->total_success += legacy_success; |
1378 | lq_sta->total_failed += retries + (1 - legacy_success); | |
1379 | } | |
1380 | } | |
1381 | /* The last TX rate is cached in lq_sta; it's set in if/else above */ | |
929e6ede | 1382 | lq_sta->last_rate_n_flags = lq_hwrate; |
2fd647f8 | 1383 | IWL_DEBUG_RATE(mvm, "reduced txpower: %d\n", reduced_txp); |
8ca151b5 JB |
1384 | done: |
1385 | /* See if there's a better rate or modulation mode to try. */ | |
8dfc2751 | 1386 | if (sta->supp_rates[info->band]) |
1ebc8f2e ES |
1387 | rs_rate_scale_perform(mvm, sta, lq_sta, tid); |
1388 | } | |
1389 | ||
1390 | /* | |
1391 | * mac80211 sends us Tx status | |
1392 | */ | |
1393 | static void rs_mac80211_tx_status(void *mvm_r, | |
1394 | struct ieee80211_supported_band *sband, | |
1395 | struct ieee80211_sta *sta, void *priv_sta, | |
1396 | struct sk_buff *skb) | |
1397 | { | |
1398 | struct ieee80211_hdr *hdr = (struct ieee80211_hdr *)skb->data; | |
1399 | struct iwl_op_mode *op_mode = (struct iwl_op_mode *)mvm_r; | |
1400 | struct iwl_mvm *mvm = IWL_OP_MODE_GET_MVM(op_mode); | |
1401 | struct ieee80211_tx_info *info = IEEE80211_SKB_CB(skb); | |
1402 | ||
dcbc17ad JB |
1403 | if (!iwl_mvm_sta_from_mac80211(sta)->vif) |
1404 | return; | |
1405 | ||
1ebc8f2e ES |
1406 | if (!ieee80211_is_data(hdr->frame_control) || |
1407 | info->flags & IEEE80211_TX_CTL_NO_ACK) | |
1408 | return; | |
1409 | ||
1410 | iwl_mvm_rs_tx_status(mvm, sta, rs_get_tid(hdr), info); | |
8ca151b5 JB |
1411 | } |
1412 | ||
1413 | /* | |
1414 | * Begin a period of staying with a selected modulation mode. | |
1415 | * Set "stay_in_tbl" flag to prevent any mode switches. | |
1416 | * Set frame tx success limits according to legacy vs. high-throughput, | |
1417 | * and reset overall (spanning all rates) tx success history statistics. | |
1418 | * These control how long we stay using same modulation mode before | |
1419 | * searching for a new mode. | |
1420 | */ | |
1421 | static void rs_set_stay_in_table(struct iwl_mvm *mvm, u8 is_legacy, | |
1422 | struct iwl_lq_sta *lq_sta) | |
1423 | { | |
b3b06a32 ES |
1424 | IWL_DEBUG_RATE(mvm, "Moving to RS_STATE_STAY_IN_COLUMN\n"); |
1425 | lq_sta->rs_state = RS_STATE_STAY_IN_COLUMN; | |
8ca151b5 | 1426 | if (is_legacy) { |
834437da ES |
1427 | lq_sta->table_count_limit = IWL_MVM_RS_LEGACY_TABLE_COUNT; |
1428 | lq_sta->max_failure_limit = IWL_MVM_RS_LEGACY_FAILURE_LIMIT; | |
1429 | lq_sta->max_success_limit = IWL_MVM_RS_LEGACY_SUCCESS_LIMIT; | |
8ca151b5 | 1430 | } else { |
834437da ES |
1431 | lq_sta->table_count_limit = IWL_MVM_RS_NON_LEGACY_TABLE_COUNT; |
1432 | lq_sta->max_failure_limit = IWL_MVM_RS_NON_LEGACY_FAILURE_LIMIT; | |
1433 | lq_sta->max_success_limit = IWL_MVM_RS_NON_LEGACY_SUCCESS_LIMIT; | |
8ca151b5 JB |
1434 | } |
1435 | lq_sta->table_count = 0; | |
1436 | lq_sta->total_failed = 0; | |
1437 | lq_sta->total_success = 0; | |
1438 | lq_sta->flush_timer = jiffies; | |
b3b06a32 | 1439 | lq_sta->visited_columns = 0; |
8ca151b5 JB |
1440 | } |
1441 | ||
6a028d9a ES |
1442 | static inline int rs_get_max_rate_from_mask(unsigned long rate_mask) |
1443 | { | |
1444 | if (rate_mask) | |
1445 | return find_last_bit(&rate_mask, BITS_PER_LONG); | |
1446 | return IWL_RATE_INVALID; | |
1447 | } | |
1448 | ||
198266a3 ES |
1449 | static int rs_get_max_allowed_rate(struct iwl_lq_sta *lq_sta, |
1450 | const struct rs_tx_column *column) | |
1451 | { | |
1452 | switch (column->mode) { | |
1453 | case RS_LEGACY: | |
1454 | return lq_sta->max_legacy_rate_idx; | |
1455 | case RS_SISO: | |
1456 | return lq_sta->max_siso_rate_idx; | |
1457 | case RS_MIMO2: | |
1458 | return lq_sta->max_mimo2_rate_idx; | |
1459 | default: | |
1460 | WARN_ON_ONCE(1); | |
1461 | } | |
1462 | ||
1463 | return lq_sta->max_legacy_rate_idx; | |
1464 | } | |
1465 | ||
a34529e8 | 1466 | static const u16 *rs_get_expected_tpt_table(struct iwl_lq_sta *lq_sta, |
198266a3 ES |
1467 | const struct rs_tx_column *column, |
1468 | u32 bw) | |
8ca151b5 JB |
1469 | { |
1470 | /* Used to choose among HT tables */ | |
a34529e8 | 1471 | const u16 (*ht_tbl_pointer)[IWL_RATE_COUNT]; |
8ca151b5 | 1472 | |
b3b06a32 ES |
1473 | if (WARN_ON_ONCE(column->mode != RS_LEGACY && |
1474 | column->mode != RS_SISO && | |
1475 | column->mode != RS_MIMO2)) | |
1476 | return expected_tpt_legacy; | |
8ca151b5 JB |
1477 | |
1478 | /* Legacy rates have only one table */ | |
b3b06a32 ES |
1479 | if (column->mode == RS_LEGACY) |
1480 | return expected_tpt_legacy; | |
8ca151b5 | 1481 | |
d310e405 | 1482 | ht_tbl_pointer = expected_tpt_mimo2_20MHz; |
8ca151b5 | 1483 | /* Choose among many HT tables depending on number of streams |
d310e405 | 1484 | * (SISO/MIMO2), channel width (20/40/80), SGI, and aggregation |
8ca151b5 | 1485 | * status */ |
b3b06a32 ES |
1486 | if (column->mode == RS_SISO) { |
1487 | switch (bw) { | |
d310e405 ES |
1488 | case RATE_MCS_CHAN_WIDTH_20: |
1489 | ht_tbl_pointer = expected_tpt_siso_20MHz; | |
1490 | break; | |
1491 | case RATE_MCS_CHAN_WIDTH_40: | |
1492 | ht_tbl_pointer = expected_tpt_siso_40MHz; | |
1493 | break; | |
1494 | case RATE_MCS_CHAN_WIDTH_80: | |
1495 | ht_tbl_pointer = expected_tpt_siso_80MHz; | |
1496 | break; | |
1497 | default: | |
1498 | WARN_ON_ONCE(1); | |
1499 | } | |
b3b06a32 ES |
1500 | } else if (column->mode == RS_MIMO2) { |
1501 | switch (bw) { | |
d310e405 ES |
1502 | case RATE_MCS_CHAN_WIDTH_20: |
1503 | ht_tbl_pointer = expected_tpt_mimo2_20MHz; | |
1504 | break; | |
1505 | case RATE_MCS_CHAN_WIDTH_40: | |
1506 | ht_tbl_pointer = expected_tpt_mimo2_40MHz; | |
1507 | break; | |
1508 | case RATE_MCS_CHAN_WIDTH_80: | |
1509 | ht_tbl_pointer = expected_tpt_mimo2_80MHz; | |
1510 | break; | |
1511 | default: | |
1512 | WARN_ON_ONCE(1); | |
1513 | } | |
1514 | } else { | |
1515 | WARN_ON_ONCE(1); | |
d972ab31 | 1516 | } |
8ca151b5 | 1517 | |
b3b06a32 ES |
1518 | if (!column->sgi && !lq_sta->is_agg) /* Normal */ |
1519 | return ht_tbl_pointer[0]; | |
1520 | else if (column->sgi && !lq_sta->is_agg) /* SGI */ | |
1521 | return ht_tbl_pointer[1]; | |
1522 | else if (!column->sgi && lq_sta->is_agg) /* AGG */ | |
1523 | return ht_tbl_pointer[2]; | |
8ca151b5 | 1524 | else /* AGG+SGI */ |
b3b06a32 ES |
1525 | return ht_tbl_pointer[3]; |
1526 | } | |
1527 | ||
1528 | static void rs_set_expected_tpt_table(struct iwl_lq_sta *lq_sta, | |
1529 | struct iwl_scale_tbl_info *tbl) | |
1530 | { | |
1531 | struct rs_rate *rate = &tbl->rate; | |
1532 | const struct rs_tx_column *column = &rs_tx_columns[tbl->column]; | |
1533 | ||
1534 | tbl->expected_tpt = rs_get_expected_tpt_table(lq_sta, column, rate->bw); | |
8ca151b5 JB |
1535 | } |
1536 | ||
8ca151b5 JB |
1537 | static s32 rs_get_best_rate(struct iwl_mvm *mvm, |
1538 | struct iwl_lq_sta *lq_sta, | |
1539 | struct iwl_scale_tbl_info *tbl, /* "search" */ | |
80763515 | 1540 | unsigned long rate_mask, s8 index) |
8ca151b5 | 1541 | { |
8ca151b5 JB |
1542 | struct iwl_scale_tbl_info *active_tbl = |
1543 | &(lq_sta->lq_info[lq_sta->active_tbl]); | |
80763515 ES |
1544 | s32 success_ratio = active_tbl->win[index].success_ratio; |
1545 | u16 expected_current_tpt = active_tbl->expected_tpt[index]; | |
a34529e8 | 1546 | const u16 *tpt_tbl = tbl->expected_tpt; |
8ca151b5 | 1547 | u16 high_low; |
80763515 ES |
1548 | u32 target_tpt; |
1549 | int rate_idx; | |
8ca151b5 | 1550 | |
ed21a384 | 1551 | if (success_ratio >= RS_PERCENT(IWL_MVM_RS_SR_NO_DECREASE)) { |
80763515 ES |
1552 | target_tpt = 100 * expected_current_tpt; |
1553 | IWL_DEBUG_RATE(mvm, | |
1554 | "SR %d high. Find rate exceeding EXPECTED_CURRENT %d\n", | |
1555 | success_ratio, target_tpt); | |
1556 | } else { | |
1557 | target_tpt = lq_sta->last_tpt; | |
1558 | IWL_DEBUG_RATE(mvm, | |
ed21a384 | 1559 | "SR %d not that good. Find rate exceeding ACTUAL_TPT %d\n", |
80763515 ES |
1560 | success_ratio, target_tpt); |
1561 | } | |
8ca151b5 | 1562 | |
80763515 | 1563 | rate_idx = find_first_bit(&rate_mask, BITS_PER_LONG); |
8ca151b5 | 1564 | |
80763515 ES |
1565 | while (rate_idx != IWL_RATE_INVALID) { |
1566 | if (target_tpt < (100 * tpt_tbl[rate_idx])) | |
1567 | break; | |
8ca151b5 | 1568 | |
80763515 ES |
1569 | high_low = rs_get_adjacent_rate(mvm, rate_idx, rate_mask, |
1570 | tbl->rate.type); | |
8ca151b5 | 1571 | |
80763515 | 1572 | rate_idx = (high_low >> 8) & 0xff; |
8ca151b5 JB |
1573 | } |
1574 | ||
80763515 ES |
1575 | IWL_DEBUG_RATE(mvm, "Best rate found %d target_tp %d expected_new %d\n", |
1576 | rate_idx, target_tpt, | |
1577 | rate_idx != IWL_RATE_INVALID ? | |
1578 | 100 * tpt_tbl[rate_idx] : IWL_INVALID_VALUE); | |
1579 | ||
1580 | return rate_idx; | |
8ca151b5 JB |
1581 | } |
1582 | ||
5aa33553 | 1583 | static u32 rs_bw_from_sta_bw(struct ieee80211_sta *sta) |
d310e405 ES |
1584 | { |
1585 | if (sta->bandwidth >= IEEE80211_STA_RX_BW_80) | |
5aa33553 | 1586 | return RATE_MCS_CHAN_WIDTH_80; |
d310e405 | 1587 | else if (sta->bandwidth >= IEEE80211_STA_RX_BW_40) |
5aa33553 ES |
1588 | return RATE_MCS_CHAN_WIDTH_40; |
1589 | ||
1590 | return RATE_MCS_CHAN_WIDTH_20; | |
d310e405 ES |
1591 | } |
1592 | ||
8ca151b5 JB |
1593 | /* |
1594 | * Check whether we should continue using same modulation mode, or | |
1595 | * begin search for a new mode, based on: | |
1596 | * 1) # tx successes or failures while using this mode | |
1597 | * 2) # times calling this function | |
1598 | * 3) elapsed time in this mode (not used, for now) | |
1599 | */ | |
1600 | static void rs_stay_in_table(struct iwl_lq_sta *lq_sta, bool force_search) | |
1601 | { | |
1602 | struct iwl_scale_tbl_info *tbl; | |
8ca151b5 JB |
1603 | int active_tbl; |
1604 | int flush_interval_passed = 0; | |
1605 | struct iwl_mvm *mvm; | |
1606 | ||
ae969afe | 1607 | mvm = lq_sta->pers.drv; |
8ca151b5 JB |
1608 | active_tbl = lq_sta->active_tbl; |
1609 | ||
1610 | tbl = &(lq_sta->lq_info[active_tbl]); | |
1611 | ||
1612 | /* If we've been disallowing search, see if we should now allow it */ | |
b3b06a32 | 1613 | if (lq_sta->rs_state == RS_STATE_STAY_IN_COLUMN) { |
8ca151b5 JB |
1614 | /* Elapsed time using current modulation mode */ |
1615 | if (lq_sta->flush_timer) | |
1616 | flush_interval_passed = | |
1617 | time_after(jiffies, | |
1618 | (unsigned long)(lq_sta->flush_timer + | |
834437da | 1619 | (IWL_MVM_RS_STAY_IN_COLUMN_TIMEOUT * HZ))); |
8ca151b5 JB |
1620 | |
1621 | /* | |
1622 | * Check if we should allow search for new modulation mode. | |
1623 | * If many frames have failed or succeeded, or we've used | |
1624 | * this same modulation for a long time, allow search, and | |
1625 | * reset history stats that keep track of whether we should | |
1626 | * allow a new search. Also (below) reset all bitmaps and | |
1627 | * stats in active history. | |
1628 | */ | |
1629 | if (force_search || | |
1630 | (lq_sta->total_failed > lq_sta->max_failure_limit) || | |
1631 | (lq_sta->total_success > lq_sta->max_success_limit) || | |
1632 | ((!lq_sta->search_better_tbl) && | |
1633 | (lq_sta->flush_timer) && (flush_interval_passed))) { | |
1634 | IWL_DEBUG_RATE(mvm, | |
1635 | "LQ: stay is expired %d %d %d\n", | |
1636 | lq_sta->total_failed, | |
1637 | lq_sta->total_success, | |
1638 | flush_interval_passed); | |
1639 | ||
1640 | /* Allow search for new mode */ | |
b3b06a32 ES |
1641 | lq_sta->rs_state = RS_STATE_SEARCH_CYCLE_STARTED; |
1642 | IWL_DEBUG_RATE(mvm, | |
1643 | "Moving to RS_STATE_SEARCH_CYCLE_STARTED\n"); | |
8ca151b5 JB |
1644 | lq_sta->total_failed = 0; |
1645 | lq_sta->total_success = 0; | |
1646 | lq_sta->flush_timer = 0; | |
b3b06a32 ES |
1647 | /* mark the current column as visited */ |
1648 | lq_sta->visited_columns = BIT(tbl->column); | |
8ca151b5 JB |
1649 | /* |
1650 | * Else if we've used this modulation mode enough repetitions | |
1651 | * (regardless of elapsed time or success/failure), reset | |
1652 | * history bitmaps and rate-specific stats for all rates in | |
1653 | * active table. | |
1654 | */ | |
1655 | } else { | |
1656 | lq_sta->table_count++; | |
1657 | if (lq_sta->table_count >= | |
1658 | lq_sta->table_count_limit) { | |
1659 | lq_sta->table_count = 0; | |
1660 | ||
1661 | IWL_DEBUG_RATE(mvm, | |
1662 | "LQ: stay in table clear win\n"); | |
b804eeb6 | 1663 | rs_rate_scale_clear_tbl_windows(mvm, tbl); |
8ca151b5 JB |
1664 | } |
1665 | } | |
1666 | ||
1667 | /* If transitioning to allow "search", reset all history | |
1668 | * bitmaps and stats in active table (this will become the new | |
1669 | * "search" table). */ | |
b3b06a32 | 1670 | if (lq_sta->rs_state == RS_STATE_SEARCH_CYCLE_STARTED) { |
b804eeb6 | 1671 | rs_rate_scale_clear_tbl_windows(mvm, tbl); |
8ca151b5 JB |
1672 | } |
1673 | } | |
1674 | } | |
1675 | ||
04e3a5da EG |
1676 | static void rs_set_amsdu_len(struct iwl_mvm *mvm, struct ieee80211_sta *sta, |
1677 | struct iwl_scale_tbl_info *tbl, | |
1678 | enum rs_action scale_action) | |
1679 | { | |
1680 | struct iwl_mvm_sta *sta_priv = iwl_mvm_sta_from_mac80211(sta); | |
1681 | ||
1682 | if ((!is_vht(&tbl->rate) && !is_ht(&tbl->rate)) || | |
1683 | tbl->rate.index < IWL_RATE_MCS_5_INDEX || | |
1684 | scale_action == RS_ACTION_DOWNSCALE) | |
1685 | sta_priv->tlc_amsdu = false; | |
1686 | else | |
1687 | sta_priv->tlc_amsdu = true; | |
1688 | } | |
1689 | ||
8ca151b5 JB |
1690 | /* |
1691 | * setup rate table in uCode | |
1692 | */ | |
1693 | static void rs_update_rate_tbl(struct iwl_mvm *mvm, | |
9145d151 | 1694 | struct ieee80211_sta *sta, |
8ca151b5 | 1695 | struct iwl_lq_sta *lq_sta, |
7b9d74e4 | 1696 | struct iwl_scale_tbl_info *tbl) |
8ca151b5 | 1697 | { |
7b9d74e4 | 1698 | rs_fill_lq_cmd(mvm, sta, lq_sta, &tbl->rate); |
9e680946 | 1699 | iwl_mvm_send_lq_cmd(mvm, &lq_sta->lq, false); |
8ca151b5 JB |
1700 | } |
1701 | ||
1191f646 ES |
1702 | static bool rs_tweak_rate_tbl(struct iwl_mvm *mvm, |
1703 | struct ieee80211_sta *sta, | |
1704 | struct iwl_lq_sta *lq_sta, | |
1705 | struct iwl_scale_tbl_info *tbl, | |
1706 | enum rs_action scale_action) | |
1707 | { | |
1708 | if (sta->bandwidth != IEEE80211_STA_RX_BW_80) | |
1709 | return false; | |
1710 | ||
1711 | if (!is_vht_siso(&tbl->rate)) | |
1712 | return false; | |
1713 | ||
1714 | if ((tbl->rate.bw == RATE_MCS_CHAN_WIDTH_80) && | |
1715 | (tbl->rate.index == IWL_RATE_MCS_0_INDEX) && | |
1716 | (scale_action == RS_ACTION_DOWNSCALE)) { | |
1717 | tbl->rate.bw = RATE_MCS_CHAN_WIDTH_20; | |
1718 | tbl->rate.index = IWL_RATE_MCS_4_INDEX; | |
1719 | IWL_DEBUG_RATE(mvm, "Switch 80Mhz SISO MCS0 -> 20Mhz MCS4\n"); | |
1720 | goto tweaked; | |
1721 | } | |
1722 | ||
1723 | /* Go back to 80Mhz MCS1 only if we've established that 20Mhz MCS5 is | |
1724 | * sustainable, i.e. we're past the test window. We can't go back | |
1725 | * if MCS5 is just tested as this will happen always after switching | |
1726 | * to 20Mhz MCS4 because the rate stats are cleared. | |
1727 | */ | |
1728 | if ((tbl->rate.bw == RATE_MCS_CHAN_WIDTH_20) && | |
1729 | (((tbl->rate.index == IWL_RATE_MCS_5_INDEX) && | |
1730 | (scale_action == RS_ACTION_STAY)) || | |
1731 | ((tbl->rate.index > IWL_RATE_MCS_5_INDEX) && | |
1732 | (scale_action == RS_ACTION_UPSCALE)))) { | |
1733 | tbl->rate.bw = RATE_MCS_CHAN_WIDTH_80; | |
1734 | tbl->rate.index = IWL_RATE_MCS_1_INDEX; | |
1735 | IWL_DEBUG_RATE(mvm, "Switch 20Mhz SISO MCS5 -> 80Mhz MCS1\n"); | |
1736 | goto tweaked; | |
1737 | } | |
1738 | ||
1739 | return false; | |
1740 | ||
1741 | tweaked: | |
1742 | rs_set_expected_tpt_table(lq_sta, tbl); | |
1743 | rs_rate_scale_clear_tbl_windows(mvm, tbl); | |
1744 | return true; | |
1745 | } | |
1746 | ||
b3b06a32 ES |
1747 | static enum rs_column rs_get_next_column(struct iwl_mvm *mvm, |
1748 | struct iwl_lq_sta *lq_sta, | |
1749 | struct ieee80211_sta *sta, | |
1750 | struct iwl_scale_tbl_info *tbl) | |
1751 | { | |
198266a3 | 1752 | int i, j, max_rate; |
b3b06a32 ES |
1753 | enum rs_column next_col_id; |
1754 | const struct rs_tx_column *curr_col = &rs_tx_columns[tbl->column]; | |
1755 | const struct rs_tx_column *next_col; | |
1756 | allow_column_func_t allow_func; | |
a0544272 | 1757 | u8 valid_ants = iwl_mvm_get_valid_tx_ant(mvm); |
a34529e8 | 1758 | const u16 *expected_tpt_tbl; |
198266a3 | 1759 | u16 tpt, max_expected_tpt; |
b3b06a32 ES |
1760 | |
1761 | for (i = 0; i < MAX_NEXT_COLUMNS; i++) { | |
1762 | next_col_id = curr_col->next_columns[i]; | |
1763 | ||
1764 | if (next_col_id == RS_COLUMN_INVALID) | |
1765 | continue; | |
1766 | ||
1767 | if (lq_sta->visited_columns & BIT(next_col_id)) { | |
1768 | IWL_DEBUG_RATE(mvm, "Skip already visited column %d\n", | |
1769 | next_col_id); | |
1770 | continue; | |
1771 | } | |
1772 | ||
1773 | next_col = &rs_tx_columns[next_col_id]; | |
1774 | ||
1775 | if (!rs_is_valid_ant(valid_ants, next_col->ant)) { | |
1776 | IWL_DEBUG_RATE(mvm, | |
1777 | "Skip column %d as ANT config isn't supported by chip. valid_ants 0x%x column ant 0x%x\n", | |
1778 | next_col_id, valid_ants, next_col->ant); | |
1779 | continue; | |
1780 | } | |
1781 | ||
1782 | for (j = 0; j < MAX_COLUMN_CHECKS; j++) { | |
1783 | allow_func = next_col->checks[j]; | |
bb8f44c9 ES |
1784 | if (allow_func && !allow_func(mvm, sta, &tbl->rate, |
1785 | next_col)) | |
b3b06a32 ES |
1786 | break; |
1787 | } | |
1788 | ||
1789 | if (j != MAX_COLUMN_CHECKS) { | |
1790 | IWL_DEBUG_RATE(mvm, | |
1791 | "Skip column %d: not allowed (check %d failed)\n", | |
1792 | next_col_id, j); | |
1793 | ||
1794 | continue; | |
1795 | } | |
1796 | ||
1797 | tpt = lq_sta->last_tpt / 100; | |
1798 | expected_tpt_tbl = rs_get_expected_tpt_table(lq_sta, next_col, | |
049e0c33 | 1799 | rs_bw_from_sta_bw(sta)); |
b3b06a32 ES |
1800 | if (WARN_ON_ONCE(!expected_tpt_tbl)) |
1801 | continue; | |
1802 | ||
198266a3 | 1803 | max_rate = rs_get_max_allowed_rate(lq_sta, next_col); |
6a028d9a ES |
1804 | if (max_rate == IWL_RATE_INVALID) { |
1805 | IWL_DEBUG_RATE(mvm, | |
1806 | "Skip column %d: no rate is allowed in this column\n", | |
1807 | next_col_id); | |
198266a3 | 1808 | continue; |
6a028d9a | 1809 | } |
b3b06a32 | 1810 | |
198266a3 | 1811 | max_expected_tpt = expected_tpt_tbl[max_rate]; |
b3b06a32 ES |
1812 | if (tpt >= max_expected_tpt) { |
1813 | IWL_DEBUG_RATE(mvm, | |
1814 | "Skip column %d: can't beat current TPT. Max expected %d current %d\n", | |
1815 | next_col_id, max_expected_tpt, tpt); | |
1816 | continue; | |
1817 | } | |
1818 | ||
198266a3 ES |
1819 | IWL_DEBUG_RATE(mvm, |
1820 | "Found potential column %d. Max expected %d current %d\n", | |
1821 | next_col_id, max_expected_tpt, tpt); | |
b3b06a32 ES |
1822 | break; |
1823 | } | |
1824 | ||
1825 | if (i == MAX_NEXT_COLUMNS) | |
1826 | return RS_COLUMN_INVALID; | |
1827 | ||
b3b06a32 ES |
1828 | return next_col_id; |
1829 | } | |
1830 | ||
1831 | static int rs_switch_to_column(struct iwl_mvm *mvm, | |
1832 | struct iwl_lq_sta *lq_sta, | |
1833 | struct ieee80211_sta *sta, | |
1834 | enum rs_column col_id) | |
1835 | { | |
1836 | struct iwl_scale_tbl_info *tbl = &(lq_sta->lq_info[lq_sta->active_tbl]); | |
1837 | struct iwl_scale_tbl_info *search_tbl = | |
1838 | &(lq_sta->lq_info[(1 - lq_sta->active_tbl)]); | |
1839 | struct rs_rate *rate = &search_tbl->rate; | |
1840 | const struct rs_tx_column *column = &rs_tx_columns[col_id]; | |
1841 | const struct rs_tx_column *curr_column = &rs_tx_columns[tbl->column]; | |
1842 | u32 sz = (sizeof(struct iwl_scale_tbl_info) - | |
1843 | (sizeof(struct iwl_rate_scale_data) * IWL_RATE_COUNT)); | |
80763515 | 1844 | unsigned long rate_mask = 0; |
b3b06a32 ES |
1845 | u32 rate_idx = 0; |
1846 | ||
1847 | memcpy(search_tbl, tbl, sz); | |
1848 | ||
1849 | rate->sgi = column->sgi; | |
1850 | rate->ant = column->ant; | |
1851 | ||
1852 | if (column->mode == RS_LEGACY) { | |
1853 | if (lq_sta->band == IEEE80211_BAND_5GHZ) | |
1854 | rate->type = LQ_LEGACY_A; | |
1855 | else | |
1856 | rate->type = LQ_LEGACY_G; | |
1857 | ||
d8bafeaf ES |
1858 | rate->bw = RATE_MCS_CHAN_WIDTH_20; |
1859 | rate->ldpc = false; | |
b3b06a32 ES |
1860 | rate_mask = lq_sta->active_legacy_rate; |
1861 | } else if (column->mode == RS_SISO) { | |
1862 | rate->type = lq_sta->is_vht ? LQ_VHT_SISO : LQ_HT_SISO; | |
1863 | rate_mask = lq_sta->active_siso_rate; | |
1864 | } else if (column->mode == RS_MIMO2) { | |
1865 | rate->type = lq_sta->is_vht ? LQ_VHT_MIMO2 : LQ_HT_MIMO2; | |
1866 | rate_mask = lq_sta->active_mimo2_rate; | |
1867 | } else { | |
7281b164 | 1868 | WARN_ONCE(1, "Bad column mode"); |
b3b06a32 ES |
1869 | } |
1870 | ||
d8bafeaf ES |
1871 | if (column->mode != RS_LEGACY) { |
1872 | rate->bw = rs_bw_from_sta_bw(sta); | |
1873 | rate->ldpc = lq_sta->ldpc; | |
1874 | } | |
1875 | ||
b3b06a32 ES |
1876 | search_tbl->column = col_id; |
1877 | rs_set_expected_tpt_table(lq_sta, search_tbl); | |
1878 | ||
75d3e2d6 ES |
1879 | lq_sta->visited_columns |= BIT(col_id); |
1880 | ||
b3b06a32 ES |
1881 | /* Get the best matching rate if we're changing modes. e.g. |
1882 | * SISO->MIMO, LEGACY->SISO, MIMO->SISO | |
1883 | */ | |
1884 | if (curr_column->mode != column->mode) { | |
1885 | rate_idx = rs_get_best_rate(mvm, lq_sta, search_tbl, | |
1886 | rate_mask, rate->index); | |
1887 | ||
1888 | if ((rate_idx == IWL_RATE_INVALID) || | |
1889 | !(BIT(rate_idx) & rate_mask)) { | |
1890 | IWL_DEBUG_RATE(mvm, | |
1891 | "can not switch with index %d" | |
80763515 | 1892 | " rate mask %lx\n", |
b3b06a32 ES |
1893 | rate_idx, rate_mask); |
1894 | ||
1895 | goto err; | |
1896 | } | |
1897 | ||
1898 | rate->index = rate_idx; | |
1899 | } | |
1900 | ||
b3b06a32 ES |
1901 | IWL_DEBUG_RATE(mvm, "Switched to column %d: Index %d\n", |
1902 | col_id, rate->index); | |
1903 | ||
b3b06a32 ES |
1904 | return 0; |
1905 | ||
1906 | err: | |
1907 | rate->type = LQ_NONE; | |
1908 | return -1; | |
1909 | } | |
1910 | ||
4e4b815c ES |
1911 | static enum rs_action rs_get_rate_action(struct iwl_mvm *mvm, |
1912 | struct iwl_scale_tbl_info *tbl, | |
1913 | s32 sr, int low, int high, | |
1914 | int current_tpt, | |
1915 | int low_tpt, int high_tpt) | |
1916 | { | |
1917 | enum rs_action action = RS_ACTION_STAY; | |
1918 | ||
834437da ES |
1919 | if ((sr <= RS_PERCENT(IWL_MVM_RS_SR_FORCE_DECREASE)) || |
1920 | (current_tpt == 0)) { | |
4e4b815c | 1921 | IWL_DEBUG_RATE(mvm, |
e53839eb ES |
1922 | "Decrease rate because of low SR\n"); |
1923 | return RS_ACTION_DOWNSCALE; | |
4e4b815c ES |
1924 | } |
1925 | ||
e53839eb ES |
1926 | if ((low_tpt == IWL_INVALID_VALUE) && |
1927 | (high_tpt == IWL_INVALID_VALUE) && | |
1928 | (high != IWL_RATE_INVALID)) { | |
4e4b815c | 1929 | IWL_DEBUG_RATE(mvm, |
e53839eb ES |
1930 | "No data about high/low rates. Increase rate\n"); |
1931 | return RS_ACTION_UPSCALE; | |
4e4b815c ES |
1932 | } |
1933 | ||
e53839eb ES |
1934 | if ((high_tpt == IWL_INVALID_VALUE) && |
1935 | (high != IWL_RATE_INVALID) && | |
1936 | (low_tpt != IWL_INVALID_VALUE) && | |
1937 | (low_tpt < current_tpt)) { | |
1938 | IWL_DEBUG_RATE(mvm, | |
1939 | "No data about high rate and low rate is worse. Increase rate\n"); | |
1940 | return RS_ACTION_UPSCALE; | |
1941 | } | |
4e4b815c | 1942 | |
e53839eb ES |
1943 | if ((high_tpt != IWL_INVALID_VALUE) && |
1944 | (high_tpt > current_tpt)) { | |
1945 | IWL_DEBUG_RATE(mvm, | |
1946 | "Higher rate is better. Increate rate\n"); | |
1947 | return RS_ACTION_UPSCALE; | |
4e4b815c ES |
1948 | } |
1949 | ||
e53839eb ES |
1950 | if ((low_tpt != IWL_INVALID_VALUE) && |
1951 | (high_tpt != IWL_INVALID_VALUE) && | |
1952 | (low_tpt < current_tpt) && | |
1953 | (high_tpt < current_tpt)) { | |
4e4b815c | 1954 | IWL_DEBUG_RATE(mvm, |
e53839eb ES |
1955 | "Both high and low are worse. Maintain rate\n"); |
1956 | return RS_ACTION_STAY; | |
1957 | } | |
1958 | ||
1959 | if ((low_tpt != IWL_INVALID_VALUE) && | |
1960 | (low_tpt > current_tpt)) { | |
1961 | IWL_DEBUG_RATE(mvm, | |
1962 | "Lower rate is better\n"); | |
1963 | action = RS_ACTION_DOWNSCALE; | |
1964 | goto out; | |
1965 | } | |
1966 | ||
1967 | if ((low_tpt == IWL_INVALID_VALUE) && | |
1968 | (low != IWL_RATE_INVALID)) { | |
4e4b815c | 1969 | IWL_DEBUG_RATE(mvm, |
e53839eb ES |
1970 | "No data about lower rate\n"); |
1971 | action = RS_ACTION_DOWNSCALE; | |
1972 | goto out; | |
1973 | } | |
1974 | ||
1975 | IWL_DEBUG_RATE(mvm, "Maintain rate\n"); | |
1976 | ||
1977 | out: | |
1978 | if ((action == RS_ACTION_DOWNSCALE) && (low != IWL_RATE_INVALID)) { | |
834437da | 1979 | if (sr >= RS_PERCENT(IWL_MVM_RS_SR_NO_DECREASE)) { |
e53839eb ES |
1980 | IWL_DEBUG_RATE(mvm, |
1981 | "SR is above NO DECREASE. Avoid downscale\n"); | |
1982 | action = RS_ACTION_STAY; | |
1983 | } else if (current_tpt > (100 * tbl->expected_tpt[low])) { | |
1984 | IWL_DEBUG_RATE(mvm, | |
1985 | "Current TPT is higher than max expected in low rate. Avoid downscale\n"); | |
1986 | action = RS_ACTION_STAY; | |
1987 | } else { | |
1988 | IWL_DEBUG_RATE(mvm, "Decrease rate\n"); | |
1989 | } | |
4e4b815c ES |
1990 | } |
1991 | ||
1992 | return action; | |
1993 | } | |
b3b06a32 | 1994 | |
d8bafeaf ES |
1995 | static bool rs_stbc_allow(struct iwl_mvm *mvm, struct ieee80211_sta *sta, |
1996 | struct iwl_lq_sta *lq_sta) | |
1997 | { | |
d8bafeaf ES |
1998 | /* Our chip supports Tx STBC and the peer is an HT/VHT STA which |
1999 | * supports STBC of at least 1*SS | |
2000 | */ | |
3d44eebf | 2001 | if (!lq_sta->stbc_capable) |
d8bafeaf ES |
2002 | return false; |
2003 | ||
d8bafeaf ES |
2004 | if (!iwl_mvm_bt_coex_is_mimo_allowed(mvm, sta)) |
2005 | return false; | |
2006 | ||
2007 | return true; | |
2008 | } | |
2009 | ||
2fd647f8 EP |
2010 | static void rs_get_adjacent_txp(struct iwl_mvm *mvm, int index, |
2011 | int *weaker, int *stronger) | |
2012 | { | |
834437da | 2013 | *weaker = index + IWL_MVM_RS_TPC_TX_POWER_STEP; |
2fd647f8 EP |
2014 | if (*weaker > TPC_MAX_REDUCTION) |
2015 | *weaker = TPC_INVALID; | |
2016 | ||
834437da | 2017 | *stronger = index - IWL_MVM_RS_TPC_TX_POWER_STEP; |
2fd647f8 EP |
2018 | if (*stronger < 0) |
2019 | *stronger = TPC_INVALID; | |
2020 | } | |
2021 | ||
1e9551de ES |
2022 | static bool rs_tpc_allowed(struct iwl_mvm *mvm, struct ieee80211_vif *vif, |
2023 | struct rs_rate *rate, enum ieee80211_band band) | |
2fd647f8 EP |
2024 | { |
2025 | int index = rate->index; | |
1e9551de ES |
2026 | bool cam = (iwlmvm_mod_params.power_scheme == IWL_POWER_SCHEME_CAM); |
2027 | bool sta_ps_disabled = (vif->type == NL80211_IFTYPE_STATION && | |
2028 | !vif->bss_conf.ps); | |
2fd647f8 | 2029 | |
1e9551de ES |
2030 | IWL_DEBUG_RATE(mvm, "cam: %d sta_ps_disabled %d\n", |
2031 | cam, sta_ps_disabled); | |
2fd647f8 EP |
2032 | /* |
2033 | * allow tpc only if power management is enabled, or bt coex | |
2034 | * activity grade allows it and we are on 2.4Ghz. | |
2035 | */ | |
1e9551de | 2036 | if ((cam || sta_ps_disabled) && |
2fd647f8 EP |
2037 | !iwl_mvm_bt_coex_is_tpc_allowed(mvm, band)) |
2038 | return false; | |
2039 | ||
2040 | IWL_DEBUG_RATE(mvm, "check rate, table type: %d\n", rate->type); | |
2041 | if (is_legacy(rate)) | |
2042 | return index == IWL_RATE_54M_INDEX; | |
2043 | if (is_ht(rate)) | |
2044 | return index == IWL_RATE_MCS_7_INDEX; | |
2045 | if (is_vht(rate)) | |
2046 | return index == IWL_RATE_MCS_7_INDEX || | |
2047 | index == IWL_RATE_MCS_8_INDEX || | |
2048 | index == IWL_RATE_MCS_9_INDEX; | |
2049 | ||
2050 | WARN_ON_ONCE(1); | |
2051 | return false; | |
2052 | } | |
2053 | ||
2054 | enum tpc_action { | |
2055 | TPC_ACTION_STAY, | |
2056 | TPC_ACTION_DECREASE, | |
2057 | TPC_ACTION_INCREASE, | |
2058 | TPC_ACTION_NO_RESTIRCTION, | |
2059 | }; | |
2060 | ||
2061 | static enum tpc_action rs_get_tpc_action(struct iwl_mvm *mvm, | |
2062 | s32 sr, int weak, int strong, | |
2063 | int current_tpt, | |
2064 | int weak_tpt, int strong_tpt) | |
2065 | { | |
2066 | /* stay until we have valid tpt */ | |
2067 | if (current_tpt == IWL_INVALID_VALUE) { | |
2068 | IWL_DEBUG_RATE(mvm, "no current tpt. stay.\n"); | |
2069 | return TPC_ACTION_STAY; | |
2070 | } | |
2071 | ||
2072 | /* Too many failures, increase txp */ | |
834437da ES |
2073 | if (sr <= RS_PERCENT(IWL_MVM_RS_TPC_SR_FORCE_INCREASE) || |
2074 | current_tpt == 0) { | |
2fd647f8 EP |
2075 | IWL_DEBUG_RATE(mvm, "increase txp because of weak SR\n"); |
2076 | return TPC_ACTION_NO_RESTIRCTION; | |
2077 | } | |
2078 | ||
2079 | /* try decreasing first if applicable */ | |
6ad6c01f GG |
2080 | if (sr >= RS_PERCENT(IWL_MVM_RS_TPC_SR_NO_INCREASE) && |
2081 | weak != TPC_INVALID) { | |
2fd647f8 EP |
2082 | if (weak_tpt == IWL_INVALID_VALUE && |
2083 | (strong_tpt == IWL_INVALID_VALUE || | |
2084 | current_tpt >= strong_tpt)) { | |
2085 | IWL_DEBUG_RATE(mvm, | |
2086 | "no weak txp measurement. decrease txp\n"); | |
2087 | return TPC_ACTION_DECREASE; | |
2088 | } | |
2089 | ||
2090 | if (weak_tpt > current_tpt) { | |
2091 | IWL_DEBUG_RATE(mvm, | |
2092 | "lower txp has better tpt. decrease txp\n"); | |
2093 | return TPC_ACTION_DECREASE; | |
2094 | } | |
2095 | } | |
2096 | ||
2097 | /* next, increase if needed */ | |
834437da ES |
2098 | if (sr < RS_PERCENT(IWL_MVM_RS_TPC_SR_NO_INCREASE) && |
2099 | strong != TPC_INVALID) { | |
2fd647f8 EP |
2100 | if (weak_tpt == IWL_INVALID_VALUE && |
2101 | strong_tpt != IWL_INVALID_VALUE && | |
2102 | current_tpt < strong_tpt) { | |
2103 | IWL_DEBUG_RATE(mvm, | |
2104 | "higher txp has better tpt. increase txp\n"); | |
2105 | return TPC_ACTION_INCREASE; | |
2106 | } | |
2107 | ||
2108 | if (weak_tpt < current_tpt && | |
2109 | (strong_tpt == IWL_INVALID_VALUE || | |
2110 | strong_tpt > current_tpt)) { | |
2111 | IWL_DEBUG_RATE(mvm, | |
2112 | "lower txp has worse tpt. increase txp\n"); | |
2113 | return TPC_ACTION_INCREASE; | |
2114 | } | |
2115 | } | |
2116 | ||
2117 | IWL_DEBUG_RATE(mvm, "no need to increase or decrease txp - stay\n"); | |
2118 | return TPC_ACTION_STAY; | |
2119 | } | |
2120 | ||
2121 | static bool rs_tpc_perform(struct iwl_mvm *mvm, | |
2122 | struct ieee80211_sta *sta, | |
2123 | struct iwl_lq_sta *lq_sta, | |
2124 | struct iwl_scale_tbl_info *tbl) | |
2125 | { | |
9d8ce6af | 2126 | struct iwl_mvm_sta *mvm_sta = iwl_mvm_sta_from_mac80211(sta); |
2fd647f8 EP |
2127 | struct ieee80211_vif *vif = mvm_sta->vif; |
2128 | struct ieee80211_chanctx_conf *chanctx_conf; | |
2129 | enum ieee80211_band band; | |
2130 | struct iwl_rate_scale_data *window; | |
2131 | struct rs_rate *rate = &tbl->rate; | |
2132 | enum tpc_action action; | |
2133 | s32 sr; | |
2134 | u8 cur = lq_sta->lq.reduced_tpc; | |
2135 | int current_tpt; | |
2136 | int weak, strong; | |
2137 | int weak_tpt = IWL_INVALID_VALUE, strong_tpt = IWL_INVALID_VALUE; | |
2138 | ||
9a75b3df | 2139 | #ifdef CONFIG_MAC80211_DEBUGFS |
ae969afe | 2140 | if (lq_sta->pers.dbg_fixed_txp_reduction <= TPC_MAX_REDUCTION) { |
3c6acb61 | 2141 | IWL_DEBUG_RATE(mvm, "fixed tpc: %d\n", |
ae969afe EP |
2142 | lq_sta->pers.dbg_fixed_txp_reduction); |
2143 | lq_sta->lq.reduced_tpc = lq_sta->pers.dbg_fixed_txp_reduction; | |
2144 | return cur != lq_sta->pers.dbg_fixed_txp_reduction; | |
9a75b3df EP |
2145 | } |
2146 | #endif | |
2147 | ||
2fd647f8 EP |
2148 | rcu_read_lock(); |
2149 | chanctx_conf = rcu_dereference(vif->chanctx_conf); | |
2150 | if (WARN_ON(!chanctx_conf)) | |
2151 | band = IEEE80211_NUM_BANDS; | |
2152 | else | |
2153 | band = chanctx_conf->def.chan->band; | |
2154 | rcu_read_unlock(); | |
2155 | ||
1e9551de | 2156 | if (!rs_tpc_allowed(mvm, vif, rate, band)) { |
2fd647f8 | 2157 | IWL_DEBUG_RATE(mvm, |
3c6acb61 | 2158 | "tpc is not allowed. remove txp restrictions\n"); |
2fd647f8 EP |
2159 | lq_sta->lq.reduced_tpc = TPC_NO_REDUCTION; |
2160 | return cur != TPC_NO_REDUCTION; | |
2161 | } | |
2162 | ||
2163 | rs_get_adjacent_txp(mvm, cur, &weak, &strong); | |
2164 | ||
2165 | /* Collect measured throughputs for current and adjacent rates */ | |
2166 | window = tbl->tpc_win; | |
2167 | sr = window[cur].success_ratio; | |
2168 | current_tpt = window[cur].average_tpt; | |
2169 | if (weak != TPC_INVALID) | |
2170 | weak_tpt = window[weak].average_tpt; | |
2171 | if (strong != TPC_INVALID) | |
2172 | strong_tpt = window[strong].average_tpt; | |
2173 | ||
2174 | IWL_DEBUG_RATE(mvm, | |
2175 | "(TPC: %d): cur_tpt %d SR %d weak %d strong %d weak_tpt %d strong_tpt %d\n", | |
2176 | cur, current_tpt, sr, weak, strong, | |
2177 | weak_tpt, strong_tpt); | |
2178 | ||
2179 | action = rs_get_tpc_action(mvm, sr, weak, strong, | |
2180 | current_tpt, weak_tpt, strong_tpt); | |
2181 | ||
2182 | /* override actions if we are on the edge */ | |
2183 | if (weak == TPC_INVALID && action == TPC_ACTION_DECREASE) { | |
3c6acb61 | 2184 | IWL_DEBUG_RATE(mvm, "already in lowest txp, stay\n"); |
2fd647f8 EP |
2185 | action = TPC_ACTION_STAY; |
2186 | } else if (strong == TPC_INVALID && | |
2187 | (action == TPC_ACTION_INCREASE || | |
2188 | action == TPC_ACTION_NO_RESTIRCTION)) { | |
3c6acb61 | 2189 | IWL_DEBUG_RATE(mvm, "already in highest txp, stay\n"); |
2fd647f8 EP |
2190 | action = TPC_ACTION_STAY; |
2191 | } | |
2192 | ||
2193 | switch (action) { | |
2194 | case TPC_ACTION_DECREASE: | |
2195 | lq_sta->lq.reduced_tpc = weak; | |
2196 | return true; | |
2197 | case TPC_ACTION_INCREASE: | |
2198 | lq_sta->lq.reduced_tpc = strong; | |
2199 | return true; | |
2200 | case TPC_ACTION_NO_RESTIRCTION: | |
2201 | lq_sta->lq.reduced_tpc = TPC_NO_REDUCTION; | |
2202 | return true; | |
2203 | case TPC_ACTION_STAY: | |
2204 | /* do nothing */ | |
2205 | break; | |
2206 | } | |
2207 | return false; | |
2208 | } | |
2209 | ||
8ca151b5 JB |
2210 | /* |
2211 | * Do rate scaling and search for new modulation mode. | |
2212 | */ | |
2213 | static void rs_rate_scale_perform(struct iwl_mvm *mvm, | |
8ca151b5 | 2214 | struct ieee80211_sta *sta, |
1ebc8f2e ES |
2215 | struct iwl_lq_sta *lq_sta, |
2216 | int tid) | |
8ca151b5 | 2217 | { |
8ca151b5 JB |
2218 | int low = IWL_RATE_INVALID; |
2219 | int high = IWL_RATE_INVALID; | |
2220 | int index; | |
8ca151b5 JB |
2221 | struct iwl_rate_scale_data *window = NULL; |
2222 | int current_tpt = IWL_INVALID_VALUE; | |
2223 | int low_tpt = IWL_INVALID_VALUE; | |
2224 | int high_tpt = IWL_INVALID_VALUE; | |
2225 | u32 fail_count; | |
4e4b815c | 2226 | enum rs_action scale_action = RS_ACTION_STAY; |
8ca151b5 JB |
2227 | u16 rate_mask; |
2228 | u8 update_lq = 0; | |
2229 | struct iwl_scale_tbl_info *tbl, *tbl1; | |
8ca151b5 JB |
2230 | u8 active_tbl = 0; |
2231 | u8 done_search = 0; | |
2232 | u16 high_low; | |
2233 | s32 sr; | |
9d015a03 | 2234 | u8 prev_agg = lq_sta->is_agg; |
9d8ce6af | 2235 | struct iwl_mvm_sta *sta_priv = iwl_mvm_sta_from_mac80211(sta); |
8ca151b5 | 2236 | struct iwl_mvm_tid_data *tid_data; |
5aa33553 | 2237 | struct rs_rate *rate; |
8ca151b5 | 2238 | |
efed6640 | 2239 | lq_sta->is_agg = !!sta_priv->agg_tids; |
8ca151b5 JB |
2240 | |
2241 | /* | |
2242 | * Select rate-scale / modulation-mode table to work with in | |
2243 | * the rest of this function: "search" if searching for better | |
2244 | * modulation mode, or "active" if doing rate scaling within a mode. | |
2245 | */ | |
2246 | if (!lq_sta->search_better_tbl) | |
2247 | active_tbl = lq_sta->active_tbl; | |
2248 | else | |
2249 | active_tbl = 1 - lq_sta->active_tbl; | |
2250 | ||
2251 | tbl = &(lq_sta->lq_info[active_tbl]); | |
5aa33553 | 2252 | rate = &tbl->rate; |
8ca151b5 | 2253 | |
9d015a03 ES |
2254 | if (prev_agg != lq_sta->is_agg) { |
2255 | IWL_DEBUG_RATE(mvm, | |
2256 | "Aggregation changed: prev %d current %d. Update expected TPT table\n", | |
2257 | prev_agg, lq_sta->is_agg); | |
2258 | rs_set_expected_tpt_table(lq_sta, tbl); | |
b804eeb6 | 2259 | rs_rate_scale_clear_tbl_windows(mvm, tbl); |
9d015a03 ES |
2260 | } |
2261 | ||
8ca151b5 | 2262 | /* current tx rate */ |
fcc5e851 | 2263 | index = rate->index; |
8ca151b5 | 2264 | |
8ca151b5 | 2265 | /* rates available for this association, and for modulation mode */ |
a8ff14f5 | 2266 | rate_mask = rs_get_supported_rates(lq_sta, rate); |
8ca151b5 | 2267 | |
ca6f38ff | 2268 | if (!(BIT(index) & rate_mask)) { |
8ca151b5 JB |
2269 | IWL_ERR(mvm, "Current Rate is not valid\n"); |
2270 | if (lq_sta->search_better_tbl) { | |
2271 | /* revert to active table if search table is not valid*/ | |
5aa33553 | 2272 | rate->type = LQ_NONE; |
8ca151b5 JB |
2273 | lq_sta->search_better_tbl = 0; |
2274 | tbl = &(lq_sta->lq_info[lq_sta->active_tbl]); | |
7b9d74e4 | 2275 | rs_update_rate_tbl(mvm, sta, lq_sta, tbl); |
8ca151b5 JB |
2276 | } |
2277 | return; | |
2278 | } | |
2279 | ||
2280 | /* Get expected throughput table and history window for current rate */ | |
2281 | if (!tbl->expected_tpt) { | |
2282 | IWL_ERR(mvm, "tbl->expected_tpt is NULL\n"); | |
2283 | return; | |
2284 | } | |
2285 | ||
2536e7c3 | 2286 | /* TODO: handle rate_idx_mask and rate_idx_mcs_mask */ |
8ca151b5 JB |
2287 | window = &(tbl->win[index]); |
2288 | ||
2289 | /* | |
2290 | * If there is not enough history to calculate actual average | |
2291 | * throughput, keep analyzing results of more tx frames, without | |
2292 | * changing rate or mode (bypass most of the rest of this function). | |
2293 | * Set up new rate table in uCode only if old rate is not supported | |
2294 | * in current association (use new rate found above). | |
2295 | */ | |
2296 | fail_count = window->counter - window->success_counter; | |
834437da ES |
2297 | if ((fail_count < IWL_MVM_RS_RATE_MIN_FAILURE_TH) && |
2298 | (window->success_counter < IWL_MVM_RS_RATE_MIN_SUCCESS_TH)) { | |
8ca151b5 | 2299 | IWL_DEBUG_RATE(mvm, |
cc60c6e9 ES |
2300 | "%s: Test Window: succ %d total %d\n", |
2301 | rs_pretty_rate(rate), | |
2302 | window->success_counter, window->counter); | |
8ca151b5 JB |
2303 | |
2304 | /* Can't calculate this yet; not enough history */ | |
2305 | window->average_tpt = IWL_INVALID_VALUE; | |
2306 | ||
2307 | /* Should we stay with this modulation mode, | |
2308 | * or search for a new one? */ | |
2309 | rs_stay_in_table(lq_sta, false); | |
2310 | ||
fcc5e851 | 2311 | return; |
8ca151b5 | 2312 | } |
8ca151b5 JB |
2313 | |
2314 | /* If we are searching for better modulation mode, check success. */ | |
2315 | if (lq_sta->search_better_tbl) { | |
2316 | /* If good success, continue using the "search" mode; | |
2317 | * no need to send new link quality command, since we're | |
2318 | * continuing to use the setup that we've been trying. */ | |
2319 | if (window->average_tpt > lq_sta->last_tpt) { | |
2320 | IWL_DEBUG_RATE(mvm, | |
4d30ee82 ES |
2321 | "SWITCHING TO NEW TABLE SR: %d " |
2322 | "cur-tpt %d old-tpt %d\n", | |
8ca151b5 JB |
2323 | window->success_ratio, |
2324 | window->average_tpt, | |
2325 | lq_sta->last_tpt); | |
2326 | ||
8ca151b5 JB |
2327 | /* Swap tables; "search" becomes "active" */ |
2328 | lq_sta->active_tbl = active_tbl; | |
2329 | current_tpt = window->average_tpt; | |
2330 | /* Else poor success; go back to mode in "active" table */ | |
2331 | } else { | |
2332 | IWL_DEBUG_RATE(mvm, | |
4d30ee82 ES |
2333 | "GOING BACK TO THE OLD TABLE: SR %d " |
2334 | "cur-tpt %d old-tpt %d\n", | |
8ca151b5 JB |
2335 | window->success_ratio, |
2336 | window->average_tpt, | |
2337 | lq_sta->last_tpt); | |
2338 | ||
2339 | /* Nullify "search" table */ | |
5aa33553 | 2340 | rate->type = LQ_NONE; |
8ca151b5 JB |
2341 | |
2342 | /* Revert to "active" table */ | |
2343 | active_tbl = lq_sta->active_tbl; | |
2344 | tbl = &(lq_sta->lq_info[active_tbl]); | |
2345 | ||
2346 | /* Revert to "active" rate and throughput info */ | |
8fc7c58c | 2347 | index = tbl->rate.index; |
8ca151b5 JB |
2348 | current_tpt = lq_sta->last_tpt; |
2349 | ||
2350 | /* Need to set up a new rate table in uCode */ | |
2351 | update_lq = 1; | |
2352 | } | |
2353 | ||
2354 | /* Either way, we've made a decision; modulation mode | |
2355 | * search is done, allow rate adjustment next time. */ | |
2356 | lq_sta->search_better_tbl = 0; | |
2357 | done_search = 1; /* Don't switch modes below! */ | |
2358 | goto lq_update; | |
2359 | } | |
2360 | ||
2361 | /* (Else) not in search of better modulation mode, try for better | |
2362 | * starting rate, while staying in this mode. */ | |
ca6f38ff | 2363 | high_low = rs_get_adjacent_rate(mvm, index, rate_mask, rate->type); |
8ca151b5 JB |
2364 | low = high_low & 0xff; |
2365 | high = (high_low >> 8) & 0xff; | |
2366 | ||
2536e7c3 | 2367 | /* TODO: handle rate_idx_mask and rate_idx_mcs_mask */ |
8ca151b5 JB |
2368 | |
2369 | sr = window->success_ratio; | |
2370 | ||
2371 | /* Collect measured throughputs for current and adjacent rates */ | |
2372 | current_tpt = window->average_tpt; | |
2373 | if (low != IWL_RATE_INVALID) | |
2374 | low_tpt = tbl->win[low].average_tpt; | |
2375 | if (high != IWL_RATE_INVALID) | |
2376 | high_tpt = tbl->win[high].average_tpt; | |
2377 | ||
4d30ee82 | 2378 | IWL_DEBUG_RATE(mvm, |
cc60c6e9 ES |
2379 | "%s: cur_tpt %d SR %d low %d high %d low_tpt %d high_tpt %d\n", |
2380 | rs_pretty_rate(rate), current_tpt, sr, | |
5aa33553 | 2381 | low, high, low_tpt, high_tpt); |
4d30ee82 | 2382 | |
4e4b815c ES |
2383 | scale_action = rs_get_rate_action(mvm, tbl, sr, low, high, |
2384 | current_tpt, low_tpt, high_tpt); | |
8ca151b5 | 2385 | |
393b9e5b | 2386 | /* Force a search in case BT doesn't like us being in MIMO */ |
5aa33553 | 2387 | if (is_mimo(rate) && |
393b9e5b | 2388 | !iwl_mvm_bt_coex_is_mimo_allowed(mvm, sta)) { |
4d30ee82 ES |
2389 | IWL_DEBUG_RATE(mvm, |
2390 | "BT Coex forbids MIMO. Search for new config\n"); | |
36946ce6 EG |
2391 | rs_stay_in_table(lq_sta, true); |
2392 | goto lq_update; | |
2393 | } | |
2394 | ||
8ca151b5 | 2395 | switch (scale_action) { |
4e4b815c | 2396 | case RS_ACTION_DOWNSCALE: |
8ca151b5 JB |
2397 | /* Decrease starting rate, update uCode's rate table */ |
2398 | if (low != IWL_RATE_INVALID) { | |
2399 | update_lq = 1; | |
2400 | index = low; | |
4d30ee82 ES |
2401 | } else { |
2402 | IWL_DEBUG_RATE(mvm, | |
2403 | "At the bottom rate. Can't decrease\n"); | |
8ca151b5 JB |
2404 | } |
2405 | ||
2406 | break; | |
4e4b815c | 2407 | case RS_ACTION_UPSCALE: |
8ca151b5 JB |
2408 | /* Increase starting rate, update uCode's rate table */ |
2409 | if (high != IWL_RATE_INVALID) { | |
2410 | update_lq = 1; | |
2411 | index = high; | |
4d30ee82 ES |
2412 | } else { |
2413 | IWL_DEBUG_RATE(mvm, | |
2414 | "At the top rate. Can't increase\n"); | |
8ca151b5 JB |
2415 | } |
2416 | ||
2417 | break; | |
4e4b815c | 2418 | case RS_ACTION_STAY: |
8ca151b5 | 2419 | /* No change */ |
e6c8d602 ES |
2420 | if (lq_sta->rs_state == RS_STATE_STAY_IN_COLUMN) |
2421 | update_lq = rs_tpc_perform(mvm, sta, lq_sta, tbl); | |
2fd647f8 | 2422 | break; |
8ca151b5 JB |
2423 | default: |
2424 | break; | |
2425 | } | |
2426 | ||
8ca151b5 JB |
2427 | lq_update: |
2428 | /* Replace uCode's rate table for the destination station. */ | |
5aa33553 ES |
2429 | if (update_lq) { |
2430 | tbl->rate.index = index; | |
1191f646 ES |
2431 | if (IWL_MVM_RS_80_20_FAR_RANGE_TWEAK) |
2432 | rs_tweak_rate_tbl(mvm, sta, lq_sta, tbl, scale_action); | |
04e3a5da | 2433 | rs_set_amsdu_len(mvm, sta, tbl, scale_action); |
7b9d74e4 | 2434 | rs_update_rate_tbl(mvm, sta, lq_sta, tbl); |
5aa33553 | 2435 | } |
8ca151b5 JB |
2436 | |
2437 | rs_stay_in_table(lq_sta, false); | |
2438 | ||
2439 | /* | |
2440 | * Search for new modulation mode if we're: | |
2441 | * 1) Not changing rates right now | |
2442 | * 2) Not just finishing up a search | |
2443 | * 3) Allowing a new search | |
2444 | */ | |
2445 | if (!update_lq && !done_search && | |
b3b06a32 ES |
2446 | lq_sta->rs_state == RS_STATE_SEARCH_CYCLE_STARTED |
2447 | && window->counter) { | |
2448 | enum rs_column next_column; | |
2449 | ||
8ca151b5 JB |
2450 | /* Save current throughput to compare with "search" throughput*/ |
2451 | lq_sta->last_tpt = current_tpt; | |
2452 | ||
4d30ee82 | 2453 | IWL_DEBUG_RATE(mvm, |
b3b06a32 ES |
2454 | "Start Search: update_lq %d done_search %d rs_state %d win->counter %d\n", |
2455 | update_lq, done_search, lq_sta->rs_state, | |
4d30ee82 | 2456 | window->counter); |
b3b06a32 ES |
2457 | |
2458 | next_column = rs_get_next_column(mvm, lq_sta, sta, tbl); | |
2459 | if (next_column != RS_COLUMN_INVALID) { | |
2460 | int ret = rs_switch_to_column(mvm, lq_sta, sta, | |
2461 | next_column); | |
2462 | if (!ret) | |
2463 | lq_sta->search_better_tbl = 1; | |
2464 | } else { | |
2465 | IWL_DEBUG_RATE(mvm, | |
2466 | "No more columns to explore in search cycle. Go to RS_STATE_SEARCH_CYCLE_ENDED\n"); | |
2467 | lq_sta->rs_state = RS_STATE_SEARCH_CYCLE_ENDED; | |
2468 | } | |
8ca151b5 JB |
2469 | |
2470 | /* If new "search" mode was selected, set up in uCode table */ | |
2471 | if (lq_sta->search_better_tbl) { | |
2472 | /* Access the "search" table, clear its history. */ | |
2473 | tbl = &(lq_sta->lq_info[(1 - lq_sta->active_tbl)]); | |
b804eeb6 | 2474 | rs_rate_scale_clear_tbl_windows(mvm, tbl); |
8ca151b5 JB |
2475 | |
2476 | /* Use new "search" start rate */ | |
8fc7c58c | 2477 | index = tbl->rate.index; |
8ca151b5 | 2478 | |
b3b06a32 ES |
2479 | rs_dump_rate(mvm, &tbl->rate, |
2480 | "Switch to SEARCH TABLE:"); | |
7b9d74e4 | 2481 | rs_update_rate_tbl(mvm, sta, lq_sta, tbl); |
8ca151b5 JB |
2482 | } else { |
2483 | done_search = 1; | |
2484 | } | |
2485 | } | |
2486 | ||
b3b06a32 | 2487 | if (done_search && lq_sta->rs_state == RS_STATE_SEARCH_CYCLE_ENDED) { |
8ca151b5 JB |
2488 | /* If the "active" (non-search) mode was legacy, |
2489 | * and we've tried switching antennas, | |
2490 | * but we haven't been able to try HT modes (not available), | |
2491 | * stay with best antenna legacy modulation for a while | |
2492 | * before next round of mode comparisons. */ | |
2493 | tbl1 = &(lq_sta->lq_info[lq_sta->active_tbl]); | |
fd7dbee5 | 2494 | if (is_legacy(&tbl1->rate)) { |
8ca151b5 | 2495 | IWL_DEBUG_RATE(mvm, "LQ: STAY in legacy table\n"); |
fd7dbee5 ES |
2496 | |
2497 | if (tid != IWL_MAX_TID_COUNT) { | |
2498 | tid_data = &sta_priv->tid_data[tid]; | |
2499 | if (tid_data->state != IWL_AGG_OFF) { | |
2500 | IWL_DEBUG_RATE(mvm, | |
2501 | "Stop aggregation on tid %d\n", | |
2502 | tid); | |
2503 | ieee80211_stop_tx_ba_session(sta, tid); | |
2504 | } | |
2505 | } | |
8ca151b5 | 2506 | rs_set_stay_in_table(mvm, 1, lq_sta); |
b3b06a32 | 2507 | } else { |
8ca151b5 JB |
2508 | /* If we're in an HT mode, and all 3 mode switch actions |
2509 | * have been tried and compared, stay in this best modulation | |
2510 | * mode for a while before next round of mode comparisons. */ | |
8ca151b5 JB |
2511 | if ((lq_sta->last_tpt > IWL_AGG_TPT_THREHOLD) && |
2512 | (lq_sta->tx_agg_tid_en & (1 << tid)) && | |
2513 | (tid != IWL_MAX_TID_COUNT)) { | |
2514 | tid_data = &sta_priv->tid_data[tid]; | |
2515 | if (tid_data->state == IWL_AGG_OFF) { | |
2516 | IWL_DEBUG_RATE(mvm, | |
2517 | "try to aggregate tid %d\n", | |
2518 | tid); | |
2519 | rs_tl_turn_on_agg(mvm, tid, | |
2520 | lq_sta, sta); | |
2521 | } | |
2522 | } | |
2523 | rs_set_stay_in_table(mvm, 0, lq_sta); | |
2524 | } | |
2525 | } | |
8ca151b5 JB |
2526 | } |
2527 | ||
361dbec8 ES |
2528 | struct rs_init_rate_info { |
2529 | s8 rssi; | |
2530 | u8 rate_idx; | |
2531 | }; | |
2532 | ||
b503ed60 | 2533 | static const struct rs_init_rate_info rs_optimal_rates_24ghz_legacy[] = { |
361dbec8 ES |
2534 | { -60, IWL_RATE_54M_INDEX }, |
2535 | { -64, IWL_RATE_48M_INDEX }, | |
2536 | { -68, IWL_RATE_36M_INDEX }, | |
2537 | { -80, IWL_RATE_24M_INDEX }, | |
2538 | { -84, IWL_RATE_18M_INDEX }, | |
2539 | { -85, IWL_RATE_12M_INDEX }, | |
2540 | { -86, IWL_RATE_11M_INDEX }, | |
2541 | { -88, IWL_RATE_5M_INDEX }, | |
2542 | { -90, IWL_RATE_2M_INDEX }, | |
2543 | { S8_MIN, IWL_RATE_1M_INDEX }, | |
2544 | }; | |
2545 | ||
b503ed60 | 2546 | static const struct rs_init_rate_info rs_optimal_rates_5ghz_legacy[] = { |
361dbec8 ES |
2547 | { -60, IWL_RATE_54M_INDEX }, |
2548 | { -64, IWL_RATE_48M_INDEX }, | |
2549 | { -72, IWL_RATE_36M_INDEX }, | |
2550 | { -80, IWL_RATE_24M_INDEX }, | |
2551 | { -84, IWL_RATE_18M_INDEX }, | |
2552 | { -85, IWL_RATE_12M_INDEX }, | |
2553 | { -87, IWL_RATE_9M_INDEX }, | |
2554 | { S8_MIN, IWL_RATE_6M_INDEX }, | |
2555 | }; | |
2556 | ||
b503ed60 ES |
2557 | static const struct rs_init_rate_info rs_optimal_rates_ht[] = { |
2558 | { -60, IWL_RATE_MCS_7_INDEX }, | |
2559 | { -64, IWL_RATE_MCS_6_INDEX }, | |
2560 | { -68, IWL_RATE_MCS_5_INDEX }, | |
2561 | { -72, IWL_RATE_MCS_4_INDEX }, | |
2562 | { -80, IWL_RATE_MCS_3_INDEX }, | |
2563 | { -84, IWL_RATE_MCS_2_INDEX }, | |
2564 | { -85, IWL_RATE_MCS_1_INDEX }, | |
2565 | { S8_MIN, IWL_RATE_MCS_0_INDEX}, | |
2566 | }; | |
2567 | ||
2568 | static const struct rs_init_rate_info rs_optimal_rates_vht_20mhz[] = { | |
2569 | { -60, IWL_RATE_MCS_8_INDEX }, | |
2570 | { -64, IWL_RATE_MCS_7_INDEX }, | |
2571 | { -68, IWL_RATE_MCS_6_INDEX }, | |
2572 | { -72, IWL_RATE_MCS_5_INDEX }, | |
2573 | { -80, IWL_RATE_MCS_4_INDEX }, | |
2574 | { -84, IWL_RATE_MCS_3_INDEX }, | |
2575 | { -85, IWL_RATE_MCS_2_INDEX }, | |
2576 | { -87, IWL_RATE_MCS_1_INDEX }, | |
2577 | { S8_MIN, IWL_RATE_MCS_0_INDEX}, | |
2578 | }; | |
2579 | ||
2580 | static const struct rs_init_rate_info rs_optimal_rates_vht_40_80mhz[] = { | |
2581 | { -60, IWL_RATE_MCS_9_INDEX }, | |
2582 | { -64, IWL_RATE_MCS_8_INDEX }, | |
2583 | { -68, IWL_RATE_MCS_7_INDEX }, | |
2584 | { -72, IWL_RATE_MCS_6_INDEX }, | |
2585 | { -80, IWL_RATE_MCS_5_INDEX }, | |
2586 | { -84, IWL_RATE_MCS_4_INDEX }, | |
2587 | { -85, IWL_RATE_MCS_3_INDEX }, | |
2588 | { -87, IWL_RATE_MCS_2_INDEX }, | |
2589 | { -88, IWL_RATE_MCS_1_INDEX }, | |
2590 | { S8_MIN, IWL_RATE_MCS_0_INDEX }, | |
2591 | }; | |
2592 | ||
99319b8c GG |
2593 | #define IWL_RS_LOW_RSSI_THRESHOLD (-76) /* dBm */ |
2594 | ||
b503ed60 ES |
2595 | /* Init the optimal rate based on STA caps |
2596 | * This combined with rssi is used to report the last tx rate | |
2597 | * to userspace when we haven't transmitted enough frames. | |
2598 | */ | |
2599 | static void rs_init_optimal_rate(struct iwl_mvm *mvm, | |
2600 | struct ieee80211_sta *sta, | |
2601 | struct iwl_lq_sta *lq_sta) | |
2602 | { | |
2603 | struct rs_rate *rate = &lq_sta->optimal_rate; | |
2604 | ||
2605 | if (lq_sta->max_mimo2_rate_idx != IWL_RATE_INVALID) | |
2606 | rate->type = lq_sta->is_vht ? LQ_VHT_MIMO2 : LQ_HT_MIMO2; | |
2607 | else if (lq_sta->max_siso_rate_idx != IWL_RATE_INVALID) | |
2608 | rate->type = lq_sta->is_vht ? LQ_VHT_SISO : LQ_HT_SISO; | |
2609 | else if (lq_sta->band == IEEE80211_BAND_5GHZ) | |
2610 | rate->type = LQ_LEGACY_A; | |
2611 | else | |
2612 | rate->type = LQ_LEGACY_G; | |
2613 | ||
2614 | rate->bw = rs_bw_from_sta_bw(sta); | |
2615 | rate->sgi = rs_sgi_allow(mvm, sta, rate, NULL); | |
2616 | ||
2617 | /* ANT/LDPC/STBC aren't relevant for the rate reported to userspace */ | |
2618 | ||
2619 | if (is_mimo(rate)) { | |
2620 | lq_sta->optimal_rate_mask = lq_sta->active_mimo2_rate; | |
2621 | } else if (is_siso(rate)) { | |
2622 | lq_sta->optimal_rate_mask = lq_sta->active_siso_rate; | |
2623 | } else { | |
2624 | lq_sta->optimal_rate_mask = lq_sta->active_legacy_rate; | |
2625 | ||
2626 | if (lq_sta->band == IEEE80211_BAND_5GHZ) { | |
2627 | lq_sta->optimal_rates = rs_optimal_rates_5ghz_legacy; | |
2628 | lq_sta->optimal_nentries = | |
2629 | ARRAY_SIZE(rs_optimal_rates_5ghz_legacy); | |
2630 | } else { | |
2631 | lq_sta->optimal_rates = rs_optimal_rates_24ghz_legacy; | |
2632 | lq_sta->optimal_nentries = | |
2633 | ARRAY_SIZE(rs_optimal_rates_24ghz_legacy); | |
2634 | } | |
2635 | } | |
2636 | ||
2637 | if (is_vht(rate)) { | |
2638 | if (rate->bw == RATE_MCS_CHAN_WIDTH_20) { | |
2639 | lq_sta->optimal_rates = rs_optimal_rates_vht_20mhz; | |
2640 | lq_sta->optimal_nentries = | |
2641 | ARRAY_SIZE(rs_optimal_rates_vht_20mhz); | |
2642 | } else { | |
2643 | lq_sta->optimal_rates = rs_optimal_rates_vht_40_80mhz; | |
2644 | lq_sta->optimal_nentries = | |
2645 | ARRAY_SIZE(rs_optimal_rates_vht_40_80mhz); | |
2646 | } | |
2647 | } else if (is_ht(rate)) { | |
2648 | lq_sta->optimal_rates = rs_optimal_rates_ht; | |
2649 | lq_sta->optimal_nentries = ARRAY_SIZE(rs_optimal_rates_ht); | |
2650 | } | |
2651 | } | |
2652 | ||
2653 | /* Compute the optimal rate index based on RSSI */ | |
2654 | static struct rs_rate *rs_get_optimal_rate(struct iwl_mvm *mvm, | |
2655 | struct iwl_lq_sta *lq_sta) | |
2656 | { | |
2657 | struct rs_rate *rate = &lq_sta->optimal_rate; | |
2658 | int i; | |
2659 | ||
2660 | rate->index = find_first_bit(&lq_sta->optimal_rate_mask, | |
2661 | BITS_PER_LONG); | |
2662 | ||
2663 | for (i = 0; i < lq_sta->optimal_nentries; i++) { | |
2664 | int rate_idx = lq_sta->optimal_rates[i].rate_idx; | |
2665 | ||
2666 | if ((lq_sta->pers.last_rssi >= lq_sta->optimal_rates[i].rssi) && | |
2667 | (BIT(rate_idx) & lq_sta->optimal_rate_mask)) { | |
2668 | rate->index = rate_idx; | |
2669 | break; | |
2670 | } | |
2671 | } | |
2672 | ||
b503ed60 ES |
2673 | return rate; |
2674 | } | |
2675 | ||
361dbec8 ES |
2676 | /* Choose an initial legacy rate and antenna to use based on the RSSI |
2677 | * of last Rx | |
2678 | */ | |
2679 | static void rs_get_initial_rate(struct iwl_mvm *mvm, | |
99319b8c | 2680 | struct ieee80211_sta *sta, |
361dbec8 ES |
2681 | struct iwl_lq_sta *lq_sta, |
2682 | enum ieee80211_band band, | |
2683 | struct rs_rate *rate) | |
2684 | { | |
2685 | int i, nentries; | |
99319b8c | 2686 | unsigned long active_rate; |
361dbec8 ES |
2687 | s8 best_rssi = S8_MIN; |
2688 | u8 best_ant = ANT_NONE; | |
a0544272 | 2689 | u8 valid_tx_ant = iwl_mvm_get_valid_tx_ant(mvm); |
361dbec8 ES |
2690 | const struct rs_init_rate_info *initial_rates; |
2691 | ||
2692 | for (i = 0; i < ARRAY_SIZE(lq_sta->pers.chain_signal); i++) { | |
2693 | if (!(lq_sta->pers.chains & BIT(i))) | |
2694 | continue; | |
2695 | ||
2696 | if (lq_sta->pers.chain_signal[i] > best_rssi) { | |
2697 | best_rssi = lq_sta->pers.chain_signal[i]; | |
2698 | best_ant = BIT(i); | |
2699 | } | |
2700 | } | |
2701 | ||
2702 | IWL_DEBUG_RATE(mvm, "Best ANT: %s Best RSSI: %d\n", | |
2703 | rs_pretty_ant(best_ant), best_rssi); | |
2704 | ||
2705 | if (best_ant != ANT_A && best_ant != ANT_B) | |
2706 | rate->ant = first_antenna(valid_tx_ant); | |
2707 | else | |
2708 | rate->ant = best_ant; | |
2709 | ||
2710 | rate->sgi = false; | |
2711 | rate->ldpc = false; | |
2712 | rate->bw = RATE_MCS_CHAN_WIDTH_20; | |
2713 | ||
2714 | rate->index = find_first_bit(&lq_sta->active_legacy_rate, | |
2715 | BITS_PER_LONG); | |
2716 | ||
2717 | if (band == IEEE80211_BAND_5GHZ) { | |
2718 | rate->type = LQ_LEGACY_A; | |
b503ed60 ES |
2719 | initial_rates = rs_optimal_rates_5ghz_legacy; |
2720 | nentries = ARRAY_SIZE(rs_optimal_rates_5ghz_legacy); | |
361dbec8 ES |
2721 | } else { |
2722 | rate->type = LQ_LEGACY_G; | |
b503ed60 ES |
2723 | initial_rates = rs_optimal_rates_24ghz_legacy; |
2724 | nentries = ARRAY_SIZE(rs_optimal_rates_24ghz_legacy); | |
361dbec8 ES |
2725 | } |
2726 | ||
99319b8c GG |
2727 | if (!IWL_MVM_RS_RSSI_BASED_INIT_RATE) |
2728 | goto out; | |
2729 | ||
2730 | /* Start from a higher rate if the corresponding debug capability | |
2731 | * is enabled. The rate is chosen according to AP capabilities. | |
2732 | * In case of VHT/HT when the rssi is low fallback to the case of | |
2733 | * legacy rates. | |
2734 | */ | |
2735 | if (sta->vht_cap.vht_supported && | |
2736 | best_rssi > IWL_RS_LOW_RSSI_THRESHOLD) { | |
2737 | if (sta->bandwidth >= IEEE80211_STA_RX_BW_40) { | |
2738 | initial_rates = rs_optimal_rates_vht_40_80mhz; | |
2739 | nentries = ARRAY_SIZE(rs_optimal_rates_vht_40_80mhz); | |
2740 | if (sta->bandwidth >= IEEE80211_STA_RX_BW_80) | |
2741 | rate->bw = RATE_MCS_CHAN_WIDTH_80; | |
2742 | else | |
2743 | rate->bw = RATE_MCS_CHAN_WIDTH_40; | |
2744 | } else if (sta->bandwidth == IEEE80211_STA_RX_BW_20) { | |
2745 | initial_rates = rs_optimal_rates_vht_20mhz; | |
2746 | nentries = ARRAY_SIZE(rs_optimal_rates_vht_20mhz); | |
2747 | rate->bw = RATE_MCS_CHAN_WIDTH_20; | |
2748 | } else { | |
2749 | IWL_ERR(mvm, "Invalid BW %d\n", sta->bandwidth); | |
2750 | goto out; | |
361dbec8 | 2751 | } |
99319b8c GG |
2752 | active_rate = lq_sta->active_siso_rate; |
2753 | rate->type = LQ_VHT_SISO; | |
2754 | } else if (sta->ht_cap.ht_supported && | |
2755 | best_rssi > IWL_RS_LOW_RSSI_THRESHOLD) { | |
2756 | initial_rates = rs_optimal_rates_ht; | |
2757 | nentries = ARRAY_SIZE(rs_optimal_rates_ht); | |
2758 | active_rate = lq_sta->active_siso_rate; | |
2759 | rate->type = LQ_HT_SISO; | |
2760 | } else { | |
2761 | active_rate = lq_sta->active_legacy_rate; | |
361dbec8 ES |
2762 | } |
2763 | ||
99319b8c GG |
2764 | for (i = 0; i < nentries; i++) { |
2765 | int rate_idx = initial_rates[i].rate_idx; | |
2766 | ||
2767 | if ((best_rssi >= initial_rates[i].rssi) && | |
2768 | (BIT(rate_idx) & active_rate)) { | |
2769 | rate->index = rate_idx; | |
2770 | break; | |
2771 | } | |
2772 | } | |
2773 | ||
2774 | out: | |
2775 | rs_dump_rate(mvm, rate, "INITIAL"); | |
361dbec8 ES |
2776 | } |
2777 | ||
2778 | /* Save info about RSSI of last Rx */ | |
2779 | void rs_update_last_rssi(struct iwl_mvm *mvm, | |
2780 | struct iwl_lq_sta *lq_sta, | |
2781 | struct ieee80211_rx_status *rx_status) | |
2782 | { | |
b503ed60 ES |
2783 | int i; |
2784 | ||
361dbec8 ES |
2785 | lq_sta->pers.chains = rx_status->chains; |
2786 | lq_sta->pers.chain_signal[0] = rx_status->chain_signal[0]; | |
2787 | lq_sta->pers.chain_signal[1] = rx_status->chain_signal[1]; | |
2788 | lq_sta->pers.chain_signal[2] = rx_status->chain_signal[2]; | |
b503ed60 ES |
2789 | lq_sta->pers.last_rssi = S8_MIN; |
2790 | ||
2791 | for (i = 0; i < ARRAY_SIZE(lq_sta->pers.chain_signal); i++) { | |
2792 | if (!(lq_sta->pers.chains & BIT(i))) | |
2793 | continue; | |
2794 | ||
2795 | if (lq_sta->pers.chain_signal[i] > lq_sta->pers.last_rssi) | |
2796 | lq_sta->pers.last_rssi = lq_sta->pers.chain_signal[i]; | |
2797 | } | |
361dbec8 ES |
2798 | } |
2799 | ||
8ca151b5 JB |
2800 | /** |
2801 | * rs_initialize_lq - Initialize a station's hardware rate table | |
2802 | * | |
2803 | * The uCode's station table contains a table of fallback rates | |
2804 | * for automatic fallback during transmission. | |
2805 | * | |
2806 | * NOTE: This sets up a default set of values. These will be replaced later | |
2807 | * if the driver's iwl-agn-rs rate scaling algorithm is used, instead of | |
2808 | * rc80211_simple. | |
2809 | * | |
2810 | * NOTE: Run REPLY_ADD_STA command to set up station table entry, before | |
2811 | * calling this function (which runs REPLY_TX_LINK_QUALITY_CMD, | |
2812 | * which requires station table entry to exist). | |
2813 | */ | |
2814 | static void rs_initialize_lq(struct iwl_mvm *mvm, | |
2815 | struct ieee80211_sta *sta, | |
2816 | struct iwl_lq_sta *lq_sta, | |
b87c2179 ES |
2817 | enum ieee80211_band band, |
2818 | bool init) | |
8ca151b5 JB |
2819 | { |
2820 | struct iwl_scale_tbl_info *tbl; | |
5aa33553 | 2821 | struct rs_rate *rate; |
8ca151b5 | 2822 | u8 active_tbl = 0; |
8ca151b5 JB |
2823 | |
2824 | if (!sta || !lq_sta) | |
2825 | return; | |
2826 | ||
8ca151b5 JB |
2827 | if (!lq_sta->search_better_tbl) |
2828 | active_tbl = lq_sta->active_tbl; | |
2829 | else | |
2830 | active_tbl = 1 - lq_sta->active_tbl; | |
2831 | ||
2832 | tbl = &(lq_sta->lq_info[active_tbl]); | |
5aa33553 | 2833 | rate = &tbl->rate; |
8ca151b5 | 2834 | |
99319b8c | 2835 | rs_get_initial_rate(mvm, sta, lq_sta, band, rate); |
b503ed60 | 2836 | rs_init_optimal_rate(mvm, sta, lq_sta); |
8ca151b5 | 2837 | |
b3b06a32 | 2838 | WARN_ON_ONCE(rate->ant != ANT_A && rate->ant != ANT_B); |
99319b8c | 2839 | tbl->column = rs_get_column_from_rate(rate); |
b3b06a32 | 2840 | |
8ca151b5 | 2841 | rs_set_expected_tpt_table(lq_sta, tbl); |
80e9e5cd | 2842 | rs_fill_lq_cmd(mvm, sta, lq_sta, rate); |
8ca151b5 | 2843 | /* TODO restore station should remember the lq cmd */ |
b87c2179 | 2844 | iwl_mvm_send_lq_cmd(mvm, &lq_sta->lq, init); |
8ca151b5 JB |
2845 | } |
2846 | ||
2847 | static void rs_get_rate(void *mvm_r, struct ieee80211_sta *sta, void *mvm_sta, | |
2848 | struct ieee80211_tx_rate_control *txrc) | |
2849 | { | |
2850 | struct sk_buff *skb = txrc->skb; | |
8ca151b5 JB |
2851 | struct iwl_op_mode *op_mode __maybe_unused = |
2852 | (struct iwl_op_mode *)mvm_r; | |
2853 | struct iwl_mvm *mvm __maybe_unused = IWL_OP_MODE_GET_MVM(op_mode); | |
2854 | struct ieee80211_tx_info *info = IEEE80211_SKB_CB(skb); | |
2855 | struct iwl_lq_sta *lq_sta = mvm_sta; | |
b503ed60 ES |
2856 | struct rs_rate *optimal_rate; |
2857 | u32 last_ucode_rate; | |
8ca151b5 | 2858 | |
dcbc17ad JB |
2859 | if (sta && !iwl_mvm_sta_from_mac80211(sta)->vif) { |
2860 | /* if vif isn't initialized mvm doesn't know about | |
2861 | * this station, so don't do anything with the it | |
2862 | */ | |
2863 | sta = NULL; | |
2864 | mvm_sta = NULL; | |
2865 | } | |
2866 | ||
2536e7c3 | 2867 | /* TODO: handle rate_idx_mask and rate_idx_mcs_mask */ |
8ca151b5 JB |
2868 | |
2869 | /* Treat uninitialized rate scaling data same as non-existing. */ | |
ae969afe | 2870 | if (lq_sta && !lq_sta->pers.drv) { |
8ca151b5 JB |
2871 | IWL_DEBUG_RATE(mvm, "Rate scaling not initialized yet.\n"); |
2872 | mvm_sta = NULL; | |
2873 | } | |
2874 | ||
2875 | /* Send management frames and NO_ACK data using lowest rate. */ | |
2876 | if (rate_control_send_low(sta, mvm_sta, txrc)) | |
2877 | return; | |
2878 | ||
d310e405 ES |
2879 | iwl_mvm_hwrate_to_tx_rate(lq_sta->last_rate_n_flags, |
2880 | info->band, &info->control.rates[0]); | |
622ebe99 | 2881 | info->control.rates[0].count = 1; |
b503ed60 ES |
2882 | |
2883 | /* Report the optimal rate based on rssi and STA caps if we haven't | |
2884 | * converged yet (too little traffic) or exploring other modulations | |
2885 | */ | |
2886 | if (lq_sta->rs_state != RS_STATE_STAY_IN_COLUMN) { | |
2887 | optimal_rate = rs_get_optimal_rate(mvm, lq_sta); | |
2888 | last_ucode_rate = ucode_rate_from_rs_rate(mvm, | |
2889 | optimal_rate); | |
2890 | iwl_mvm_hwrate_to_tx_rate(last_ucode_rate, info->band, | |
2891 | &txrc->reported_rate); | |
2892 | } | |
8ca151b5 JB |
2893 | } |
2894 | ||
2895 | static void *rs_alloc_sta(void *mvm_rate, struct ieee80211_sta *sta, | |
2896 | gfp_t gfp) | |
2897 | { | |
9d8ce6af | 2898 | struct iwl_mvm_sta *sta_priv = iwl_mvm_sta_from_mac80211(sta); |
ae969afe EP |
2899 | struct iwl_op_mode *op_mode = (struct iwl_op_mode *)mvm_rate; |
2900 | struct iwl_mvm *mvm = IWL_OP_MODE_GET_MVM(op_mode); | |
2901 | struct iwl_lq_sta *lq_sta = &sta_priv->lq_sta; | |
8ca151b5 JB |
2902 | |
2903 | IWL_DEBUG_RATE(mvm, "create station rate scale window\n"); | |
2904 | ||
ae969afe EP |
2905 | lq_sta->pers.drv = mvm; |
2906 | #ifdef CONFIG_MAC80211_DEBUGFS | |
2907 | lq_sta->pers.dbg_fixed_rate = 0; | |
2908 | lq_sta->pers.dbg_fixed_txp_reduction = TPC_INVALID; | |
878985ce | 2909 | lq_sta->pers.ss_force = RS_SS_FORCE_NONE; |
ae969afe | 2910 | #endif |
361dbec8 ES |
2911 | lq_sta->pers.chains = 0; |
2912 | memset(lq_sta->pers.chain_signal, 0, sizeof(lq_sta->pers.chain_signal)); | |
b503ed60 | 2913 | lq_sta->pers.last_rssi = S8_MIN; |
ae969afe | 2914 | |
8ca151b5 JB |
2915 | return &sta_priv->lq_sta; |
2916 | } | |
2917 | ||
d310e405 ES |
2918 | static int rs_vht_highest_rx_mcs_index(struct ieee80211_sta_vht_cap *vht_cap, |
2919 | int nss) | |
2920 | { | |
2921 | u16 rx_mcs = le16_to_cpu(vht_cap->vht_mcs.rx_mcs_map) & | |
2922 | (0x3 << (2 * (nss - 1))); | |
2923 | rx_mcs >>= (2 * (nss - 1)); | |
2924 | ||
2925 | if (rx_mcs == IEEE80211_VHT_MCS_SUPPORT_0_7) | |
2926 | return IWL_RATE_MCS_7_INDEX; | |
2927 | else if (rx_mcs == IEEE80211_VHT_MCS_SUPPORT_0_8) | |
2928 | return IWL_RATE_MCS_8_INDEX; | |
2929 | else if (rx_mcs == IEEE80211_VHT_MCS_SUPPORT_0_9) | |
2930 | return IWL_RATE_MCS_9_INDEX; | |
2931 | ||
2932 | WARN_ON_ONCE(rx_mcs != IEEE80211_VHT_MCS_NOT_SUPPORTED); | |
2933 | return -1; | |
2934 | } | |
2935 | ||
750a1b45 ES |
2936 | static void rs_vht_set_enabled_rates(struct ieee80211_sta *sta, |
2937 | struct ieee80211_sta_vht_cap *vht_cap, | |
2938 | struct iwl_lq_sta *lq_sta) | |
2939 | { | |
2940 | int i; | |
2941 | int highest_mcs = rs_vht_highest_rx_mcs_index(vht_cap, 1); | |
2942 | ||
2943 | if (highest_mcs >= IWL_RATE_MCS_0_INDEX) { | |
2944 | for (i = IWL_RATE_MCS_0_INDEX; i <= highest_mcs; i++) { | |
2945 | if (i == IWL_RATE_9M_INDEX) | |
2946 | continue; | |
2947 | ||
271518ad ES |
2948 | /* VHT MCS9 isn't valid for 20Mhz for NSS=1,2 */ |
2949 | if (i == IWL_RATE_MCS_9_INDEX && | |
2950 | sta->bandwidth == IEEE80211_STA_RX_BW_20) | |
2951 | continue; | |
2952 | ||
750a1b45 ES |
2953 | lq_sta->active_siso_rate |= BIT(i); |
2954 | } | |
2955 | } | |
2956 | ||
ecc90e79 ES |
2957 | if (sta->rx_nss < 2) |
2958 | return; | |
2959 | ||
750a1b45 ES |
2960 | highest_mcs = rs_vht_highest_rx_mcs_index(vht_cap, 2); |
2961 | if (highest_mcs >= IWL_RATE_MCS_0_INDEX) { | |
2962 | for (i = IWL_RATE_MCS_0_INDEX; i <= highest_mcs; i++) { | |
2963 | if (i == IWL_RATE_9M_INDEX) | |
2964 | continue; | |
2965 | ||
271518ad ES |
2966 | /* VHT MCS9 isn't valid for 20Mhz for NSS=1,2 */ |
2967 | if (i == IWL_RATE_MCS_9_INDEX && | |
2968 | sta->bandwidth == IEEE80211_STA_RX_BW_20) | |
2969 | continue; | |
2970 | ||
750a1b45 ES |
2971 | lq_sta->active_mimo2_rate |= BIT(i); |
2972 | } | |
2973 | } | |
2974 | } | |
2975 | ||
2f15a829 JB |
2976 | static void rs_ht_init(struct iwl_mvm *mvm, |
2977 | struct ieee80211_sta *sta, | |
2978 | struct iwl_lq_sta *lq_sta, | |
2979 | struct ieee80211_sta_ht_cap *ht_cap) | |
2980 | { | |
2981 | /* active_siso_rate mask includes 9 MBits (bit 5), | |
2982 | * and CCK (bits 0-3), supp_rates[] does not; | |
2983 | * shift to convert format, force 9 MBits off. | |
2984 | */ | |
2985 | lq_sta->active_siso_rate = ht_cap->mcs.rx_mask[0] << 1; | |
2986 | lq_sta->active_siso_rate |= ht_cap->mcs.rx_mask[0] & 0x1; | |
2987 | lq_sta->active_siso_rate &= ~((u16)0x2); | |
2988 | lq_sta->active_siso_rate <<= IWL_FIRST_OFDM_RATE; | |
2989 | ||
2990 | lq_sta->active_mimo2_rate = ht_cap->mcs.rx_mask[1] << 1; | |
2991 | lq_sta->active_mimo2_rate |= ht_cap->mcs.rx_mask[1] & 0x1; | |
2992 | lq_sta->active_mimo2_rate &= ~((u16)0x2); | |
2993 | lq_sta->active_mimo2_rate <<= IWL_FIRST_OFDM_RATE; | |
2994 | ||
2995 | if (mvm->cfg->ht_params->ldpc && | |
2996 | (ht_cap->cap & IEEE80211_HT_CAP_LDPC_CODING)) | |
2997 | lq_sta->ldpc = true; | |
2998 | ||
2999 | if (mvm->cfg->ht_params->stbc && | |
3000 | (num_of_ant(iwl_mvm_get_valid_tx_ant(mvm)) > 1) && | |
3001 | (ht_cap->cap & IEEE80211_HT_CAP_RX_STBC)) | |
3d44eebf | 3002 | lq_sta->stbc_capable = true; |
2f15a829 JB |
3003 | |
3004 | lq_sta->is_vht = false; | |
3005 | } | |
3006 | ||
3007 | static void rs_vht_init(struct iwl_mvm *mvm, | |
3008 | struct ieee80211_sta *sta, | |
3009 | struct iwl_lq_sta *lq_sta, | |
3010 | struct ieee80211_sta_vht_cap *vht_cap) | |
3011 | { | |
3012 | rs_vht_set_enabled_rates(sta, vht_cap, lq_sta); | |
3013 | ||
3014 | if (mvm->cfg->ht_params->ldpc && | |
3015 | (vht_cap->cap & IEEE80211_VHT_CAP_RXLDPC)) | |
3016 | lq_sta->ldpc = true; | |
3017 | ||
3018 | if (mvm->cfg->ht_params->stbc && | |
3019 | (num_of_ant(iwl_mvm_get_valid_tx_ant(mvm)) > 1) && | |
3020 | (vht_cap->cap & IEEE80211_VHT_CAP_RXSTBC_MASK)) | |
3d44eebf ES |
3021 | lq_sta->stbc_capable = true; |
3022 | ||
859d914c | 3023 | if (fw_has_capa(&mvm->fw->ucode_capa, IWL_UCODE_TLV_CAPA_BEAMFORMER) && |
3d44eebf ES |
3024 | (num_of_ant(iwl_mvm_get_valid_tx_ant(mvm)) > 1) && |
3025 | (vht_cap->cap & IEEE80211_VHT_CAP_SU_BEAMFORMEE_CAPABLE)) | |
3026 | lq_sta->bfer_capable = true; | |
2f15a829 JB |
3027 | |
3028 | lq_sta->is_vht = true; | |
3029 | } | |
3030 | ||
5fc0f76c | 3031 | #ifdef CONFIG_IWLWIFI_DEBUGFS |
2f15a829 | 3032 | static void iwl_mvm_reset_frame_stats(struct iwl_mvm *mvm) |
5fc0f76c ES |
3033 | { |
3034 | spin_lock_bh(&mvm->drv_stats_lock); | |
2f15a829 | 3035 | memset(&mvm->drv_rx_stats, 0, sizeof(mvm->drv_rx_stats)); |
5fc0f76c ES |
3036 | spin_unlock_bh(&mvm->drv_stats_lock); |
3037 | } | |
3038 | ||
2f15a829 | 3039 | void iwl_mvm_update_frame_stats(struct iwl_mvm *mvm, u32 rate, bool agg) |
5fc0f76c ES |
3040 | { |
3041 | u8 nss = 0, mcs = 0; | |
3042 | ||
3043 | spin_lock(&mvm->drv_stats_lock); | |
3044 | ||
3045 | if (agg) | |
2f15a829 | 3046 | mvm->drv_rx_stats.agg_frames++; |
5fc0f76c | 3047 | |
2f15a829 | 3048 | mvm->drv_rx_stats.success_frames++; |
5fc0f76c ES |
3049 | |
3050 | switch (rate & RATE_MCS_CHAN_WIDTH_MSK) { | |
3051 | case RATE_MCS_CHAN_WIDTH_20: | |
2f15a829 | 3052 | mvm->drv_rx_stats.bw_20_frames++; |
5fc0f76c ES |
3053 | break; |
3054 | case RATE_MCS_CHAN_WIDTH_40: | |
2f15a829 | 3055 | mvm->drv_rx_stats.bw_40_frames++; |
5fc0f76c ES |
3056 | break; |
3057 | case RATE_MCS_CHAN_WIDTH_80: | |
2f15a829 | 3058 | mvm->drv_rx_stats.bw_80_frames++; |
5fc0f76c ES |
3059 | break; |
3060 | default: | |
3061 | WARN_ONCE(1, "bad BW. rate 0x%x", rate); | |
3062 | } | |
3063 | ||
3064 | if (rate & RATE_MCS_HT_MSK) { | |
2f15a829 | 3065 | mvm->drv_rx_stats.ht_frames++; |
5fc0f76c ES |
3066 | mcs = rate & RATE_HT_MCS_RATE_CODE_MSK; |
3067 | nss = ((rate & RATE_HT_MCS_NSS_MSK) >> RATE_HT_MCS_NSS_POS) + 1; | |
3068 | } else if (rate & RATE_MCS_VHT_MSK) { | |
2f15a829 | 3069 | mvm->drv_rx_stats.vht_frames++; |
5fc0f76c ES |
3070 | mcs = rate & RATE_VHT_MCS_RATE_CODE_MSK; |
3071 | nss = ((rate & RATE_VHT_MCS_NSS_MSK) >> | |
3072 | RATE_VHT_MCS_NSS_POS) + 1; | |
3073 | } else { | |
2f15a829 | 3074 | mvm->drv_rx_stats.legacy_frames++; |
5fc0f76c ES |
3075 | } |
3076 | ||
3077 | if (nss == 1) | |
2f15a829 | 3078 | mvm->drv_rx_stats.siso_frames++; |
5fc0f76c | 3079 | else if (nss == 2) |
2f15a829 | 3080 | mvm->drv_rx_stats.mimo2_frames++; |
5fc0f76c ES |
3081 | |
3082 | if (rate & RATE_MCS_SGI_MSK) | |
2f15a829 | 3083 | mvm->drv_rx_stats.sgi_frames++; |
5fc0f76c | 3084 | else |
2f15a829 | 3085 | mvm->drv_rx_stats.ngi_frames++; |
5fc0f76c | 3086 | |
2f15a829 JB |
3087 | mvm->drv_rx_stats.last_rates[mvm->drv_rx_stats.last_frame_idx] = rate; |
3088 | mvm->drv_rx_stats.last_frame_idx = | |
3089 | (mvm->drv_rx_stats.last_frame_idx + 1) % | |
3090 | ARRAY_SIZE(mvm->drv_rx_stats.last_rates); | |
5fc0f76c ES |
3091 | |
3092 | spin_unlock(&mvm->drv_stats_lock); | |
3093 | } | |
3094 | #endif | |
3095 | ||
8ca151b5 JB |
3096 | /* |
3097 | * Called after adding a new station to initialize rate scaling | |
3098 | */ | |
3099 | void iwl_mvm_rs_rate_init(struct iwl_mvm *mvm, struct ieee80211_sta *sta, | |
b87c2179 | 3100 | enum ieee80211_band band, bool init) |
8ca151b5 JB |
3101 | { |
3102 | int i, j; | |
3103 | struct ieee80211_hw *hw = mvm->hw; | |
3104 | struct ieee80211_sta_ht_cap *ht_cap = &sta->ht_cap; | |
d310e405 | 3105 | struct ieee80211_sta_vht_cap *vht_cap = &sta->vht_cap; |
9d8ce6af JB |
3106 | struct iwl_mvm_sta *sta_priv = iwl_mvm_sta_from_mac80211(sta); |
3107 | struct iwl_lq_sta *lq_sta = &sta_priv->lq_sta; | |
8ca151b5 JB |
3108 | struct ieee80211_supported_band *sband; |
3109 | unsigned long supp; /* must be unsigned long for for_each_set_bit */ | |
3110 | ||
ae969afe EP |
3111 | /* clear all non-persistent lq data */ |
3112 | memset(lq_sta, 0, offsetof(typeof(*lq_sta), pers)); | |
b87c2179 | 3113 | |
8ca151b5 JB |
3114 | sband = hw->wiphy->bands[band]; |
3115 | ||
3116 | lq_sta->lq.sta_id = sta_priv->sta_id; | |
04e3a5da | 3117 | sta_priv->tlc_amsdu = false; |
8ca151b5 JB |
3118 | |
3119 | for (j = 0; j < LQ_SIZE; j++) | |
b804eeb6 | 3120 | rs_rate_scale_clear_tbl_windows(mvm, &lq_sta->lq_info[j]); |
8ca151b5 JB |
3121 | |
3122 | lq_sta->flush_timer = 0; | |
87d5e415 | 3123 | lq_sta->last_tx = jiffies; |
8ca151b5 JB |
3124 | |
3125 | IWL_DEBUG_RATE(mvm, | |
3126 | "LQ: *** rate scale station global init for station %d ***\n", | |
3127 | sta_priv->sta_id); | |
3128 | /* TODO: what is a good starting rate for STA? About middle? Maybe not | |
3129 | * the lowest or the highest rate.. Could consider using RSSI from | |
3130 | * previous packets? Need to have IEEE 802.1X auth succeed immediately | |
3131 | * after assoc.. */ | |
3132 | ||
834437da | 3133 | lq_sta->missed_rate_counter = IWL_MVM_RS_MISSED_RATE_MAX; |
8ca151b5 JB |
3134 | lq_sta->band = sband->band; |
3135 | /* | |
3136 | * active legacy rates as per supported rates bitmap | |
3137 | */ | |
3138 | supp = sta->supp_rates[sband->band]; | |
3139 | lq_sta->active_legacy_rate = 0; | |
3140 | for_each_set_bit(i, &supp, BITS_PER_LONG) | |
3141 | lq_sta->active_legacy_rate |= BIT(sband->bitrates[i].hw_value); | |
3142 | ||
d310e405 | 3143 | /* TODO: should probably account for rx_highest for both HT/VHT */ |
2c59d80c ES |
3144 | if (!vht_cap || !vht_cap->vht_supported) |
3145 | rs_ht_init(mvm, sta, lq_sta, ht_cap); | |
3146 | else | |
3147 | rs_vht_init(mvm, sta, lq_sta, vht_cap); | |
8ca151b5 | 3148 | |
6a028d9a ES |
3149 | lq_sta->max_legacy_rate_idx = |
3150 | rs_get_max_rate_from_mask(lq_sta->active_legacy_rate); | |
3151 | lq_sta->max_siso_rate_idx = | |
3152 | rs_get_max_rate_from_mask(lq_sta->active_siso_rate); | |
3153 | lq_sta->max_mimo2_rate_idx = | |
3154 | rs_get_max_rate_from_mask(lq_sta->active_mimo2_rate); | |
198266a3 | 3155 | |
a3576ff2 | 3156 | IWL_DEBUG_RATE(mvm, |
3d44eebf | 3157 | "LEGACY=%lX SISO=%lX MIMO2=%lX VHT=%d LDPC=%d STBC=%d BFER=%d\n", |
198266a3 | 3158 | lq_sta->active_legacy_rate, |
8ca151b5 | 3159 | lq_sta->active_siso_rate, |
d310e405 | 3160 | lq_sta->active_mimo2_rate, |
3d44eebf ES |
3161 | lq_sta->is_vht, lq_sta->ldpc, lq_sta->stbc_capable, |
3162 | lq_sta->bfer_capable); | |
198266a3 ES |
3163 | IWL_DEBUG_RATE(mvm, "MAX RATE: LEGACY=%d SISO=%d MIMO2=%d\n", |
3164 | lq_sta->max_legacy_rate_idx, | |
3165 | lq_sta->max_siso_rate_idx, | |
3166 | lq_sta->max_mimo2_rate_idx); | |
8ca151b5 JB |
3167 | |
3168 | /* These values will be overridden later */ | |
3169 | lq_sta->lq.single_stream_ant_msk = | |
a0544272 | 3170 | first_antenna(iwl_mvm_get_valid_tx_ant(mvm)); |
809bccfa | 3171 | lq_sta->lq.dual_stream_ant_msk = ANT_AB; |
8ca151b5 JB |
3172 | |
3173 | /* as default allow aggregation for all tids */ | |
3174 | lq_sta->tx_agg_tid_en = IWL_AGG_ALL_TID; | |
8ca151b5 | 3175 | lq_sta->is_agg = 0; |
5fc0f76c | 3176 | #ifdef CONFIG_IWLWIFI_DEBUGFS |
2f15a829 | 3177 | iwl_mvm_reset_frame_stats(mvm); |
5fc0f76c | 3178 | #endif |
b87c2179 ES |
3179 | rs_initialize_lq(mvm, sta, lq_sta, band, init); |
3180 | } | |
3181 | ||
3182 | static void rs_rate_update(void *mvm_r, | |
3183 | struct ieee80211_supported_band *sband, | |
3184 | struct cfg80211_chan_def *chandef, | |
3185 | struct ieee80211_sta *sta, void *priv_sta, | |
3186 | u32 changed) | |
3187 | { | |
3188 | u8 tid; | |
3189 | struct iwl_op_mode *op_mode = | |
3190 | (struct iwl_op_mode *)mvm_r; | |
3191 | struct iwl_mvm *mvm = IWL_OP_MODE_GET_MVM(op_mode); | |
3192 | ||
dcbc17ad JB |
3193 | if (!iwl_mvm_sta_from_mac80211(sta)->vif) |
3194 | return; | |
3195 | ||
b87c2179 ES |
3196 | /* Stop any ongoing aggregations as rs starts off assuming no agg */ |
3197 | for (tid = 0; tid < IWL_MAX_TID_COUNT; tid++) | |
3198 | ieee80211_stop_tx_ba_session(sta, tid); | |
3199 | ||
3200 | iwl_mvm_rs_rate_init(mvm, sta, sband->band, false); | |
8ca151b5 JB |
3201 | } |
3202 | ||
8fc7c58c ES |
3203 | #ifdef CONFIG_MAC80211_DEBUGFS |
3204 | static void rs_build_rates_table_from_fixed(struct iwl_mvm *mvm, | |
3205 | struct iwl_lq_cmd *lq_cmd, | |
3206 | enum ieee80211_band band, | |
3207 | u32 ucode_rate) | |
3208 | { | |
3209 | struct rs_rate rate; | |
3210 | int i; | |
3211 | int num_rates = ARRAY_SIZE(lq_cmd->rs_table); | |
3212 | __le32 ucode_rate_le32 = cpu_to_le32(ucode_rate); | |
7ceb98a3 | 3213 | u8 ant = (ucode_rate & RATE_MCS_ANT_ABC_MSK) >> RATE_MCS_ANT_POS; |
8fc7c58c ES |
3214 | |
3215 | for (i = 0; i < num_rates; i++) | |
3216 | lq_cmd->rs_table[i] = ucode_rate_le32; | |
3217 | ||
3218 | rs_rate_from_ucode_rate(ucode_rate, band, &rate); | |
3219 | ||
3220 | if (is_mimo(&rate)) | |
3221 | lq_cmd->mimo_delim = num_rates - 1; | |
3222 | else | |
3223 | lq_cmd->mimo_delim = 0; | |
7ceb98a3 EG |
3224 | |
3225 | lq_cmd->reduced_tpc = 0; | |
3226 | ||
3227 | if (num_of_ant(ant) == 1) | |
3228 | lq_cmd->single_stream_ant_msk = ant; | |
3229 | ||
3230 | lq_cmd->agg_frame_cnt_limit = LINK_QUAL_AGG_FRAME_LIMIT_DEF; | |
8fc7c58c ES |
3231 | } |
3232 | #endif /* CONFIG_MAC80211_DEBUGFS */ | |
3233 | ||
e07be6d3 ES |
3234 | static void rs_fill_rates_for_column(struct iwl_mvm *mvm, |
3235 | struct iwl_lq_sta *lq_sta, | |
3236 | struct rs_rate *rate, | |
3237 | __le32 *rs_table, int *rs_table_index, | |
3238 | int num_rates, int num_retries, | |
3239 | u8 valid_tx_ant, bool toggle_ant) | |
3240 | { | |
3241 | int i, j; | |
3242 | __le32 ucode_rate; | |
3243 | bool bottom_reached = false; | |
3244 | int prev_rate_idx = rate->index; | |
3245 | int end = LINK_QUAL_MAX_RETRY_NUM; | |
3246 | int index = *rs_table_index; | |
3247 | ||
3248 | for (i = 0; i < num_rates && index < end; i++) { | |
bd999318 ES |
3249 | for (j = 0; j < num_retries && index < end; j++, index++) { |
3250 | ucode_rate = cpu_to_le32(ucode_rate_from_rs_rate(mvm, | |
3251 | rate)); | |
e07be6d3 | 3252 | rs_table[index] = ucode_rate; |
bd999318 ES |
3253 | if (toggle_ant) |
3254 | rs_toggle_antenna(valid_tx_ant, rate); | |
3255 | } | |
e07be6d3 ES |
3256 | |
3257 | prev_rate_idx = rate->index; | |
3258 | bottom_reached = rs_get_lower_rate_in_column(lq_sta, rate); | |
3259 | if (bottom_reached && !is_legacy(rate)) | |
3260 | break; | |
3261 | } | |
3262 | ||
bd999318 | 3263 | if (!bottom_reached && !is_legacy(rate)) |
e07be6d3 ES |
3264 | rate->index = prev_rate_idx; |
3265 | ||
3266 | *rs_table_index = index; | |
3267 | } | |
3268 | ||
3269 | /* Building the rate table is non trivial. When we're in MIMO2/VHT/80Mhz/SGI | |
3270 | * column the rate table should look like this: | |
3271 | * | |
3272 | * rate[0] 0x400D019 VHT | ANT: AB BW: 80Mhz MCS: 9 NSS: 2 SGI | |
3273 | * rate[1] 0x400D019 VHT | ANT: AB BW: 80Mhz MCS: 9 NSS: 2 SGI | |
3274 | * rate[2] 0x400D018 VHT | ANT: AB BW: 80Mhz MCS: 8 NSS: 2 SGI | |
3275 | * rate[3] 0x400D018 VHT | ANT: AB BW: 80Mhz MCS: 8 NSS: 2 SGI | |
3276 | * rate[4] 0x400D017 VHT | ANT: AB BW: 80Mhz MCS: 7 NSS: 2 SGI | |
3277 | * rate[5] 0x400D017 VHT | ANT: AB BW: 80Mhz MCS: 7 NSS: 2 SGI | |
3278 | * rate[6] 0x4005007 VHT | ANT: A BW: 80Mhz MCS: 7 NSS: 1 NGI | |
3279 | * rate[7] 0x4009006 VHT | ANT: B BW: 80Mhz MCS: 6 NSS: 1 NGI | |
3280 | * rate[8] 0x4005005 VHT | ANT: A BW: 80Mhz MCS: 5 NSS: 1 NGI | |
3281 | * rate[9] 0x800B Legacy | ANT: B Rate: 36 Mbps | |
3282 | * rate[10] 0x4009 Legacy | ANT: A Rate: 24 Mbps | |
3283 | * rate[11] 0x8007 Legacy | ANT: B Rate: 18 Mbps | |
3284 | * rate[12] 0x4005 Legacy | ANT: A Rate: 12 Mbps | |
3285 | * rate[13] 0x800F Legacy | ANT: B Rate: 9 Mbps | |
3286 | * rate[14] 0x400D Legacy | ANT: A Rate: 6 Mbps | |
3287 | * rate[15] 0x800D Legacy | ANT: B Rate: 6 Mbps | |
3288 | */ | |
8fc7c58c | 3289 | static void rs_build_rates_table(struct iwl_mvm *mvm, |
d8bafeaf | 3290 | struct ieee80211_sta *sta, |
8fc7c58c ES |
3291 | struct iwl_lq_sta *lq_sta, |
3292 | const struct rs_rate *initial_rate) | |
8ca151b5 | 3293 | { |
5aa33553 | 3294 | struct rs_rate rate; |
e07be6d3 | 3295 | int num_rates, num_retries, index = 0; |
8ca151b5 JB |
3296 | u8 valid_tx_ant = 0; |
3297 | struct iwl_lq_cmd *lq_cmd = &lq_sta->lq; | |
e07be6d3 | 3298 | bool toggle_ant = false; |
8ca151b5 | 3299 | |
9e898f1b | 3300 | memcpy(&rate, initial_rate, sizeof(rate)); |
8fc7c58c | 3301 | |
a0544272 | 3302 | valid_tx_ant = iwl_mvm_get_valid_tx_ant(mvm); |
c5d679a5 | 3303 | |
3d44eebf | 3304 | /* TODO: remove old API when min FW API hits 14 */ |
859d914c | 3305 | if (!fw_has_api(&mvm->fw->ucode_capa, IWL_UCODE_TLV_API_LQ_SS_PARAMS) && |
3d44eebf ES |
3306 | rs_stbc_allow(mvm, sta, lq_sta)) |
3307 | rate.stbc = true; | |
8ca151b5 | 3308 | |
e07be6d3 | 3309 | if (is_siso(&rate)) { |
834437da ES |
3310 | num_rates = IWL_MVM_RS_INITIAL_SISO_NUM_RATES; |
3311 | num_retries = IWL_MVM_RS_HT_VHT_RETRIES_PER_RATE; | |
e07be6d3 | 3312 | } else if (is_mimo(&rate)) { |
834437da ES |
3313 | num_rates = IWL_MVM_RS_INITIAL_MIMO_NUM_RATES; |
3314 | num_retries = IWL_MVM_RS_HT_VHT_RETRIES_PER_RATE; | |
8ca151b5 | 3315 | } else { |
834437da | 3316 | num_rates = IWL_MVM_RS_INITIAL_LEGACY_NUM_RATES; |
bd999318 | 3317 | num_retries = IWL_MVM_RS_INITIAL_LEGACY_RETRIES; |
e07be6d3 | 3318 | toggle_ant = true; |
8ca151b5 JB |
3319 | } |
3320 | ||
e07be6d3 ES |
3321 | rs_fill_rates_for_column(mvm, lq_sta, &rate, lq_cmd->rs_table, &index, |
3322 | num_rates, num_retries, valid_tx_ant, | |
3323 | toggle_ant); | |
8ca151b5 | 3324 | |
e07be6d3 | 3325 | rs_get_lower_rate_down_column(lq_sta, &rate); |
8ca151b5 | 3326 | |
e07be6d3 | 3327 | if (is_siso(&rate)) { |
834437da ES |
3328 | num_rates = IWL_MVM_RS_SECONDARY_SISO_NUM_RATES; |
3329 | num_retries = IWL_MVM_RS_SECONDARY_SISO_RETRIES; | |
d9088f60 | 3330 | lq_cmd->mimo_delim = index; |
e07be6d3 | 3331 | } else if (is_legacy(&rate)) { |
834437da | 3332 | num_rates = IWL_MVM_RS_SECONDARY_LEGACY_NUM_RATES; |
bd999318 | 3333 | num_retries = IWL_MVM_RS_SECONDARY_LEGACY_RETRIES; |
e07be6d3 ES |
3334 | } else { |
3335 | WARN_ON_ONCE(1); | |
3336 | } | |
8ca151b5 | 3337 | |
e07be6d3 | 3338 | toggle_ant = true; |
8ca151b5 | 3339 | |
e07be6d3 ES |
3340 | rs_fill_rates_for_column(mvm, lq_sta, &rate, lq_cmd->rs_table, &index, |
3341 | num_rates, num_retries, valid_tx_ant, | |
3342 | toggle_ant); | |
8ca151b5 | 3343 | |
e07be6d3 | 3344 | rs_get_lower_rate_down_column(lq_sta, &rate); |
8ca151b5 | 3345 | |
834437da | 3346 | num_rates = IWL_MVM_RS_SECONDARY_LEGACY_NUM_RATES; |
bd999318 | 3347 | num_retries = IWL_MVM_RS_SECONDARY_LEGACY_RETRIES; |
8ca151b5 | 3348 | |
e07be6d3 ES |
3349 | rs_fill_rates_for_column(mvm, lq_sta, &rate, lq_cmd->rs_table, &index, |
3350 | num_rates, num_retries, valid_tx_ant, | |
3351 | toggle_ant); | |
8ca151b5 | 3352 | |
8fc7c58c ES |
3353 | } |
3354 | ||
3d44eebf ES |
3355 | struct rs_bfer_active_iter_data { |
3356 | struct ieee80211_sta *exclude_sta; | |
3357 | struct iwl_mvm_sta *bfer_mvmsta; | |
3358 | }; | |
3359 | ||
3360 | static void rs_bfer_active_iter(void *_data, | |
3361 | struct ieee80211_sta *sta) | |
3362 | { | |
3363 | struct rs_bfer_active_iter_data *data = _data; | |
3364 | struct iwl_mvm_sta *mvmsta = iwl_mvm_sta_from_mac80211(sta); | |
3365 | struct iwl_lq_cmd *lq_cmd = &mvmsta->lq_sta.lq; | |
3366 | u32 ss_params = le32_to_cpu(lq_cmd->ss_params); | |
3367 | ||
3368 | if (sta == data->exclude_sta) | |
3369 | return; | |
3370 | ||
3371 | /* The current sta has BFER allowed */ | |
3372 | if (ss_params & LQ_SS_BFER_ALLOWED) { | |
3373 | WARN_ON_ONCE(data->bfer_mvmsta != NULL); | |
3374 | ||
3375 | data->bfer_mvmsta = mvmsta; | |
3376 | } | |
3377 | } | |
3378 | ||
3379 | static int rs_bfer_priority(struct iwl_mvm_sta *sta) | |
3380 | { | |
3381 | int prio = -1; | |
3382 | enum nl80211_iftype viftype = ieee80211_vif_type_p2p(sta->vif); | |
3383 | ||
3384 | switch (viftype) { | |
3385 | case NL80211_IFTYPE_AP: | |
3386 | case NL80211_IFTYPE_P2P_GO: | |
3387 | prio = 3; | |
3388 | break; | |
3389 | case NL80211_IFTYPE_P2P_CLIENT: | |
3390 | prio = 2; | |
3391 | break; | |
3392 | case NL80211_IFTYPE_STATION: | |
3393 | prio = 1; | |
3394 | break; | |
3395 | default: | |
3396 | WARN_ONCE(true, "viftype %d sta_id %d", viftype, sta->sta_id); | |
3397 | prio = -1; | |
3398 | } | |
3399 | ||
3400 | return prio; | |
3401 | } | |
3402 | ||
3403 | /* Returns >0 if sta1 has a higher BFER priority compared to sta2 */ | |
3404 | static int rs_bfer_priority_cmp(struct iwl_mvm_sta *sta1, | |
3405 | struct iwl_mvm_sta *sta2) | |
3406 | { | |
3407 | int prio1 = rs_bfer_priority(sta1); | |
3408 | int prio2 = rs_bfer_priority(sta2); | |
3409 | ||
3410 | if (prio1 > prio2) | |
3411 | return 1; | |
3412 | if (prio1 < prio2) | |
3413 | return -1; | |
3414 | return 0; | |
3415 | } | |
3416 | ||
3417 | static void rs_set_lq_ss_params(struct iwl_mvm *mvm, | |
3418 | struct ieee80211_sta *sta, | |
3419 | struct iwl_lq_sta *lq_sta, | |
3420 | const struct rs_rate *initial_rate) | |
3421 | { | |
3422 | struct iwl_lq_cmd *lq_cmd = &lq_sta->lq; | |
3423 | struct iwl_mvm_sta *mvmsta = iwl_mvm_sta_from_mac80211(sta); | |
3424 | struct rs_bfer_active_iter_data data = { | |
3425 | .exclude_sta = sta, | |
3426 | .bfer_mvmsta = NULL, | |
3427 | }; | |
3428 | struct iwl_mvm_sta *bfer_mvmsta = NULL; | |
3429 | u32 ss_params = LQ_SS_PARAMS_VALID; | |
3430 | ||
3431 | if (!iwl_mvm_bt_coex_is_mimo_allowed(mvm, sta)) | |
3432 | goto out; | |
3433 | ||
878985ce | 3434 | #ifdef CONFIG_MAC80211_DEBUGFS |
1e9c62fa ES |
3435 | /* Check if forcing the decision is configured. |
3436 | * Note that SISO is forced by not allowing STBC or BFER | |
3437 | */ | |
878985ce | 3438 | if (lq_sta->pers.ss_force == RS_SS_FORCE_STBC) |
1e9c62fa | 3439 | ss_params |= (LQ_SS_STBC_1SS_ALLOWED | LQ_SS_FORCE); |
878985ce | 3440 | else if (lq_sta->pers.ss_force == RS_SS_FORCE_BFER) |
1e9c62fa ES |
3441 | ss_params |= (LQ_SS_BFER_ALLOWED | LQ_SS_FORCE); |
3442 | ||
878985ce | 3443 | if (lq_sta->pers.ss_force != RS_SS_FORCE_NONE) { |
1e9c62fa | 3444 | IWL_DEBUG_RATE(mvm, "Forcing single stream Tx decision %d\n", |
878985ce | 3445 | lq_sta->pers.ss_force); |
1e9c62fa ES |
3446 | goto out; |
3447 | } | |
878985ce | 3448 | #endif |
1e9c62fa | 3449 | |
3d44eebf ES |
3450 | if (lq_sta->stbc_capable) |
3451 | ss_params |= LQ_SS_STBC_1SS_ALLOWED; | |
3452 | ||
3453 | if (!lq_sta->bfer_capable) | |
3454 | goto out; | |
3455 | ||
3456 | ieee80211_iterate_stations_atomic(mvm->hw, | |
3457 | rs_bfer_active_iter, | |
3458 | &data); | |
3459 | bfer_mvmsta = data.bfer_mvmsta; | |
3460 | ||
3461 | /* This code is safe as it doesn't run concurrently for different | |
3462 | * stations. This is guaranteed by the fact that calls to | |
3463 | * ieee80211_tx_status wouldn't run concurrently for a single HW. | |
3464 | */ | |
3465 | if (!bfer_mvmsta) { | |
3466 | IWL_DEBUG_RATE(mvm, "No sta with BFER allowed found. Allow\n"); | |
3467 | ||
3468 | ss_params |= LQ_SS_BFER_ALLOWED; | |
3469 | goto out; | |
3470 | } | |
3471 | ||
3472 | IWL_DEBUG_RATE(mvm, "Found existing sta %d with BFER activated\n", | |
3473 | bfer_mvmsta->sta_id); | |
3474 | ||
3475 | /* Disallow BFER on another STA if active and we're a higher priority */ | |
3476 | if (rs_bfer_priority_cmp(mvmsta, bfer_mvmsta) > 0) { | |
3477 | struct iwl_lq_cmd *bfersta_lq_cmd = &bfer_mvmsta->lq_sta.lq; | |
3478 | u32 bfersta_ss_params = le32_to_cpu(bfersta_lq_cmd->ss_params); | |
3479 | ||
3480 | bfersta_ss_params &= ~LQ_SS_BFER_ALLOWED; | |
3481 | bfersta_lq_cmd->ss_params = cpu_to_le32(bfersta_ss_params); | |
3482 | iwl_mvm_send_lq_cmd(mvm, bfersta_lq_cmd, false); | |
3483 | ||
3484 | ss_params |= LQ_SS_BFER_ALLOWED; | |
3485 | IWL_DEBUG_RATE(mvm, | |
3486 | "Lower priority BFER sta found (%d). Switch BFER\n", | |
3487 | bfer_mvmsta->sta_id); | |
3488 | } | |
3489 | out: | |
3490 | lq_cmd->ss_params = cpu_to_le32(ss_params); | |
3491 | } | |
3492 | ||
8fc7c58c ES |
3493 | static void rs_fill_lq_cmd(struct iwl_mvm *mvm, |
3494 | struct ieee80211_sta *sta, | |
3495 | struct iwl_lq_sta *lq_sta, | |
3496 | const struct rs_rate *initial_rate) | |
3497 | { | |
3498 | struct iwl_lq_cmd *lq_cmd = &lq_sta->lq; | |
7ceb98a3 EG |
3499 | struct iwl_mvm_sta *mvmsta; |
3500 | struct iwl_mvm_vif *mvmvif; | |
3501 | ||
834437da | 3502 | lq_cmd->agg_disable_start_th = IWL_MVM_RS_AGG_DISABLE_START; |
7ceb98a3 | 3503 | lq_cmd->agg_time_limit = |
834437da | 3504 | cpu_to_le16(IWL_MVM_RS_AGG_TIME_LIMIT); |
8fc7c58c ES |
3505 | |
3506 | #ifdef CONFIG_MAC80211_DEBUGFS | |
ae969afe | 3507 | if (lq_sta->pers.dbg_fixed_rate) { |
8fc7c58c ES |
3508 | rs_build_rates_table_from_fixed(mvm, lq_cmd, |
3509 | lq_sta->band, | |
ae969afe | 3510 | lq_sta->pers.dbg_fixed_rate); |
7ceb98a3 EG |
3511 | return; |
3512 | } | |
8fc7c58c | 3513 | #endif |
7ceb98a3 EG |
3514 | if (WARN_ON_ONCE(!sta || !initial_rate)) |
3515 | return; | |
8fc7c58c | 3516 | |
d8bafeaf | 3517 | rs_build_rates_table(mvm, sta, lq_sta, initial_rate); |
8ca151b5 | 3518 | |
859d914c | 3519 | if (fw_has_api(&mvm->fw->ucode_capa, IWL_UCODE_TLV_API_LQ_SS_PARAMS)) |
3d44eebf ES |
3520 | rs_set_lq_ss_params(mvm, sta, lq_sta, initial_rate); |
3521 | ||
7ceb98a3 EG |
3522 | mvmsta = iwl_mvm_sta_from_mac80211(sta); |
3523 | mvmvif = iwl_mvm_vif_from_mac80211(mvmsta->vif); | |
e96d551f | 3524 | |
7ceb98a3 EG |
3525 | if (num_of_ant(initial_rate->ant) == 1) |
3526 | lq_cmd->single_stream_ant_msk = initial_rate->ant; | |
3527 | ||
3528 | lq_cmd->agg_frame_cnt_limit = mvmsta->max_agg_bufsize; | |
3529 | ||
3530 | /* | |
0d365ae5 | 3531 | * In case of low latency, tell the firmware to leave a frame in the |
7ceb98a3 EG |
3532 | * Tx Fifo so that it can start a transaction in the same TxOP. This |
3533 | * basically allows the firmware to send bursts. | |
3534 | */ | |
1412ee39 | 3535 | if (iwl_mvm_vif_low_latency(mvmvif)) |
7ceb98a3 EG |
3536 | lq_cmd->agg_frame_cnt_limit--; |
3537 | ||
a4db848f EG |
3538 | if (mvmsta->vif->p2p) |
3539 | lq_cmd->flags |= LQ_FLAG_USE_RTS_MSK; | |
3540 | ||
7ceb98a3 | 3541 | lq_cmd->agg_time_limit = |
5b7ff615 | 3542 | cpu_to_le16(iwl_mvm_coex_agg_time_limit(mvm, sta)); |
8ca151b5 JB |
3543 | } |
3544 | ||
3545 | static void *rs_alloc(struct ieee80211_hw *hw, struct dentry *debugfsdir) | |
3546 | { | |
3547 | return hw->priv; | |
3548 | } | |
3549 | /* rate scale requires free function to be implemented */ | |
3550 | static void rs_free(void *mvm_rate) | |
3551 | { | |
3552 | return; | |
3553 | } | |
3554 | ||
3555 | static void rs_free_sta(void *mvm_r, struct ieee80211_sta *sta, | |
3556 | void *mvm_sta) | |
3557 | { | |
3558 | struct iwl_op_mode *op_mode __maybe_unused = mvm_r; | |
3559 | struct iwl_mvm *mvm __maybe_unused = IWL_OP_MODE_GET_MVM(op_mode); | |
3560 | ||
3561 | IWL_DEBUG_RATE(mvm, "enter\n"); | |
3562 | IWL_DEBUG_RATE(mvm, "leave\n"); | |
3563 | } | |
3564 | ||
3565 | #ifdef CONFIG_MAC80211_DEBUGFS | |
5fc0f76c | 3566 | int rs_pretty_print_rate(char *buf, const u32 rate) |
5aa33553 ES |
3567 | { |
3568 | ||
1a61b347 ES |
3569 | char *type, *bw; |
3570 | u8 mcs = 0, nss = 0; | |
3571 | u8 ant = (rate & RATE_MCS_ANT_ABC_MSK) >> RATE_MCS_ANT_POS; | |
3572 | ||
3573 | if (!(rate & RATE_MCS_HT_MSK) && | |
3574 | !(rate & RATE_MCS_VHT_MSK)) { | |
3575 | int index = iwl_hwrate_to_plcp_idx(rate); | |
3576 | ||
3577 | return sprintf(buf, "Legacy | ANT: %s Rate: %s Mbps\n", | |
560843f4 ES |
3578 | rs_pretty_ant(ant), |
3579 | index == IWL_RATE_INVALID ? "BAD" : | |
3580 | iwl_rate_mcs[index].mbps); | |
1a61b347 ES |
3581 | } |
3582 | ||
3583 | if (rate & RATE_MCS_VHT_MSK) { | |
3584 | type = "VHT"; | |
3585 | mcs = rate & RATE_VHT_MCS_RATE_CODE_MSK; | |
3586 | nss = ((rate & RATE_VHT_MCS_NSS_MSK) | |
3587 | >> RATE_VHT_MCS_NSS_POS) + 1; | |
3588 | } else if (rate & RATE_MCS_HT_MSK) { | |
3589 | type = "HT"; | |
3590 | mcs = rate & RATE_HT_MCS_INDEX_MSK; | |
3591 | } else { | |
3592 | type = "Unknown"; /* shouldn't happen */ | |
3593 | } | |
3594 | ||
3595 | switch (rate & RATE_MCS_CHAN_WIDTH_MSK) { | |
3596 | case RATE_MCS_CHAN_WIDTH_20: | |
3597 | bw = "20Mhz"; | |
3598 | break; | |
3599 | case RATE_MCS_CHAN_WIDTH_40: | |
3600 | bw = "40Mhz"; | |
3601 | break; | |
3602 | case RATE_MCS_CHAN_WIDTH_80: | |
3603 | bw = "80Mhz"; | |
3604 | break; | |
3605 | case RATE_MCS_CHAN_WIDTH_160: | |
3606 | bw = "160Mhz"; | |
3607 | break; | |
3608 | default: | |
3609 | bw = "BAD BW"; | |
3610 | } | |
3611 | ||
3612 | return sprintf(buf, "%s | ANT: %s BW: %s MCS: %d NSS: %d %s%s%s%s%s\n", | |
5aa33553 | 3613 | type, rs_pretty_ant(ant), bw, mcs, nss, |
1a61b347 | 3614 | (rate & RATE_MCS_SGI_MSK) ? "SGI " : "NGI ", |
7b1dd048 | 3615 | (rate & RATE_MCS_HT_STBC_MSK) ? "STBC " : "", |
1a61b347 ES |
3616 | (rate & RATE_MCS_LDPC_MSK) ? "LDPC " : "", |
3617 | (rate & RATE_MCS_BF_MSK) ? "BF " : "", | |
3618 | (rate & RATE_MCS_ZLF_MSK) ? "ZLF " : ""); | |
3619 | } | |
3620 | ||
a0c38b21 ES |
3621 | /** |
3622 | * Program the device to use fixed rate for frame transmit | |
3623 | * This is for debugging/testing only | |
3624 | * once the device start use fixed rate, we need to reload the module | |
3625 | * to being back the normal operation. | |
3626 | */ | |
3627 | static void rs_program_fix_rate(struct iwl_mvm *mvm, | |
3628 | struct iwl_lq_sta *lq_sta) | |
3629 | { | |
3630 | lq_sta->active_legacy_rate = 0x0FFF; /* 1 - 54 MBits, includes CCK */ | |
3631 | lq_sta->active_siso_rate = 0x1FD0; /* 6 - 60 MBits, no 9, no CCK */ | |
3632 | lq_sta->active_mimo2_rate = 0x1FD0; /* 6 - 60 MBits, no 9, no CCK */ | |
3633 | ||
3634 | IWL_DEBUG_RATE(mvm, "sta_id %d rate 0x%X\n", | |
ae969afe | 3635 | lq_sta->lq.sta_id, lq_sta->pers.dbg_fixed_rate); |
a0c38b21 | 3636 | |
ae969afe | 3637 | if (lq_sta->pers.dbg_fixed_rate) { |
7ceb98a3 | 3638 | rs_fill_lq_cmd(mvm, NULL, lq_sta, NULL); |
ae969afe | 3639 | iwl_mvm_send_lq_cmd(lq_sta->pers.drv, &lq_sta->lq, false); |
a0c38b21 ES |
3640 | } |
3641 | } | |
3642 | ||
9d10849e EG |
3643 | static ssize_t rs_sta_dbgfs_scale_table_write(struct file *file, |
3644 | const char __user *user_buf, size_t count, loff_t *ppos) | |
3645 | { | |
3646 | struct iwl_lq_sta *lq_sta = file->private_data; | |
3647 | struct iwl_mvm *mvm; | |
3648 | char buf[64]; | |
3649 | size_t buf_size; | |
3650 | u32 parsed_rate; | |
3651 | ||
ae969afe | 3652 | mvm = lq_sta->pers.drv; |
9d10849e EG |
3653 | memset(buf, 0, sizeof(buf)); |
3654 | buf_size = min(count, sizeof(buf) - 1); | |
3655 | if (copy_from_user(buf, user_buf, buf_size)) | |
3656 | return -EFAULT; | |
3657 | ||
3658 | if (sscanf(buf, "%x", &parsed_rate) == 1) | |
ae969afe | 3659 | lq_sta->pers.dbg_fixed_rate = parsed_rate; |
9d10849e | 3660 | else |
ae969afe | 3661 | lq_sta->pers.dbg_fixed_rate = 0; |
9d10849e EG |
3662 | |
3663 | rs_program_fix_rate(mvm, lq_sta); | |
3664 | ||
3665 | return count; | |
3666 | } | |
3667 | ||
8ca151b5 JB |
3668 | static ssize_t rs_sta_dbgfs_scale_table_read(struct file *file, |
3669 | char __user *user_buf, size_t count, loff_t *ppos) | |
3670 | { | |
3671 | char *buff; | |
3672 | int desc = 0; | |
3673 | int i = 0; | |
8ca151b5 JB |
3674 | ssize_t ret; |
3675 | ||
3676 | struct iwl_lq_sta *lq_sta = file->private_data; | |
04e3a5da EG |
3677 | struct iwl_mvm_sta *mvmsta = |
3678 | container_of(lq_sta, struct iwl_mvm_sta, lq_sta); | |
8ca151b5 JB |
3679 | struct iwl_mvm *mvm; |
3680 | struct iwl_scale_tbl_info *tbl = &(lq_sta->lq_info[lq_sta->active_tbl]); | |
5aa33553 | 3681 | struct rs_rate *rate = &tbl->rate; |
16c426ff | 3682 | u32 ss_params; |
04e3a5da | 3683 | |
ae969afe | 3684 | mvm = lq_sta->pers.drv; |
1a61b347 | 3685 | buff = kmalloc(2048, GFP_KERNEL); |
8ca151b5 JB |
3686 | if (!buff) |
3687 | return -ENOMEM; | |
3688 | ||
3689 | desc += sprintf(buff+desc, "sta_id %d\n", lq_sta->lq.sta_id); | |
198266a3 | 3690 | desc += sprintf(buff+desc, "failed=%d success=%d rate=0%lX\n", |
8ca151b5 JB |
3691 | lq_sta->total_failed, lq_sta->total_success, |
3692 | lq_sta->active_legacy_rate); | |
3693 | desc += sprintf(buff+desc, "fixed rate 0x%X\n", | |
ae969afe | 3694 | lq_sta->pers.dbg_fixed_rate); |
8ca151b5 | 3695 | desc += sprintf(buff+desc, "valid_tx_ant %s%s%s\n", |
a0544272 MH |
3696 | (iwl_mvm_get_valid_tx_ant(mvm) & ANT_A) ? "ANT_A," : "", |
3697 | (iwl_mvm_get_valid_tx_ant(mvm) & ANT_B) ? "ANT_B," : "", | |
3698 | (iwl_mvm_get_valid_tx_ant(mvm) & ANT_C) ? "ANT_C" : ""); | |
8ca151b5 | 3699 | desc += sprintf(buff+desc, "lq type %s\n", |
5aa33553 ES |
3700 | (is_legacy(rate)) ? "legacy" : |
3701 | is_vht(rate) ? "VHT" : "HT"); | |
3702 | if (!is_legacy(rate)) { | |
e70fe7eb | 3703 | desc += sprintf(buff + desc, " %s", |
5aa33553 | 3704 | (is_siso(rate)) ? "SISO" : "MIMO2"); |
e70fe7eb EG |
3705 | desc += sprintf(buff + desc, " %s", |
3706 | (is_ht20(rate)) ? "20MHz" : | |
3707 | (is_ht40(rate)) ? "40MHz" : | |
3708 | (is_ht80(rate)) ? "80Mhz" : "BAD BW"); | |
04e3a5da | 3709 | desc += sprintf(buff + desc, " %s %s %s %s\n", |
e70fe7eb EG |
3710 | (rate->sgi) ? "SGI" : "NGI", |
3711 | (rate->ldpc) ? "LDPC" : "BCC", | |
04e3a5da EG |
3712 | (lq_sta->is_agg) ? "AGG on" : "", |
3713 | (mvmsta->tlc_amsdu) ? "AMSDU on" : ""); | |
8ca151b5 JB |
3714 | } |
3715 | desc += sprintf(buff+desc, "last tx rate=0x%X\n", | |
3716 | lq_sta->last_rate_n_flags); | |
3717 | desc += sprintf(buff+desc, | |
1a61b347 | 3718 | "general: flags=0x%X mimo-d=%d s-ant=0x%x d-ant=0x%x\n", |
8ca151b5 JB |
3719 | lq_sta->lq.flags, |
3720 | lq_sta->lq.mimo_delim, | |
3721 | lq_sta->lq.single_stream_ant_msk, | |
3722 | lq_sta->lq.dual_stream_ant_msk); | |
3723 | ||
3724 | desc += sprintf(buff+desc, | |
3725 | "agg: time_limit=%d dist_start_th=%d frame_cnt_limit=%d\n", | |
3726 | le16_to_cpu(lq_sta->lq.agg_time_limit), | |
3727 | lq_sta->lq.agg_disable_start_th, | |
3728 | lq_sta->lq.agg_frame_cnt_limit); | |
3729 | ||
2fd647f8 | 3730 | desc += sprintf(buff+desc, "reduced tpc=%d\n", lq_sta->lq.reduced_tpc); |
16c426ff ES |
3731 | ss_params = le32_to_cpu(lq_sta->lq.ss_params); |
3732 | desc += sprintf(buff+desc, "single stream params: %s%s%s%s\n", | |
3733 | (ss_params & LQ_SS_PARAMS_VALID) ? | |
db7c689d | 3734 | "VALID" : "INVALID", |
16c426ff | 3735 | (ss_params & LQ_SS_BFER_ALLOWED) ? |
db7c689d | 3736 | ", BFER" : "", |
16c426ff | 3737 | (ss_params & LQ_SS_STBC_1SS_ALLOWED) ? |
db7c689d | 3738 | ", STBC" : "", |
16c426ff | 3739 | (ss_params & LQ_SS_FORCE) ? |
db7c689d | 3740 | ", FORCE" : ""); |
8ca151b5 JB |
3741 | desc += sprintf(buff+desc, |
3742 | "Start idx [0]=0x%x [1]=0x%x [2]=0x%x [3]=0x%x\n", | |
3743 | lq_sta->lq.initial_rate_index[0], | |
3744 | lq_sta->lq.initial_rate_index[1], | |
3745 | lq_sta->lq.initial_rate_index[2], | |
3746 | lq_sta->lq.initial_rate_index[3]); | |
3747 | ||
3748 | for (i = 0; i < LINK_QUAL_MAX_RETRY_NUM; i++) { | |
cf4ef654 | 3749 | u32 r = le32_to_cpu(lq_sta->lq.rs_table[i]); |
1a61b347 | 3750 | |
cf4ef654 JB |
3751 | desc += sprintf(buff+desc, " rate[%d] 0x%X ", i, r); |
3752 | desc += rs_pretty_print_rate(buff+desc, r); | |
8ca151b5 JB |
3753 | } |
3754 | ||
3755 | ret = simple_read_from_buffer(user_buf, count, ppos, buff, desc); | |
3756 | kfree(buff); | |
3757 | return ret; | |
3758 | } | |
3759 | ||
3760 | static const struct file_operations rs_sta_dbgfs_scale_table_ops = { | |
3761 | .write = rs_sta_dbgfs_scale_table_write, | |
3762 | .read = rs_sta_dbgfs_scale_table_read, | |
3763 | .open = simple_open, | |
3764 | .llseek = default_llseek, | |
3765 | }; | |
3766 | static ssize_t rs_sta_dbgfs_stats_table_read(struct file *file, | |
3767 | char __user *user_buf, size_t count, loff_t *ppos) | |
3768 | { | |
3769 | char *buff; | |
3770 | int desc = 0; | |
3771 | int i, j; | |
3772 | ssize_t ret; | |
d310e405 | 3773 | struct iwl_scale_tbl_info *tbl; |
5aa33553 | 3774 | struct rs_rate *rate; |
8ca151b5 JB |
3775 | struct iwl_lq_sta *lq_sta = file->private_data; |
3776 | ||
3777 | buff = kmalloc(1024, GFP_KERNEL); | |
3778 | if (!buff) | |
3779 | return -ENOMEM; | |
3780 | ||
3781 | for (i = 0; i < LQ_SIZE; i++) { | |
d310e405 | 3782 | tbl = &(lq_sta->lq_info[i]); |
5aa33553 | 3783 | rate = &tbl->rate; |
8ca151b5 | 3784 | desc += sprintf(buff+desc, |
6a524f48 | 3785 | "%s type=%d SGI=%d BW=%s DUP=0\n" |
8fc7c58c | 3786 | "index=%d\n", |
8ca151b5 | 3787 | lq_sta->active_tbl == i ? "*" : "x", |
5aa33553 ES |
3788 | rate->type, |
3789 | rate->sgi, | |
3790 | is_ht20(rate) ? "20Mhz" : | |
3791 | is_ht40(rate) ? "40Mhz" : | |
3792 | is_ht80(rate) ? "80Mhz" : "ERR", | |
8fc7c58c | 3793 | rate->index); |
8ca151b5 JB |
3794 | for (j = 0; j < IWL_RATE_COUNT; j++) { |
3795 | desc += sprintf(buff+desc, | |
3796 | "counter=%d success=%d %%=%d\n", | |
d310e405 ES |
3797 | tbl->win[j].counter, |
3798 | tbl->win[j].success_counter, | |
3799 | tbl->win[j].success_ratio); | |
8ca151b5 JB |
3800 | } |
3801 | } | |
3802 | ret = simple_read_from_buffer(user_buf, count, ppos, buff, desc); | |
3803 | kfree(buff); | |
3804 | return ret; | |
3805 | } | |
3806 | ||
3807 | static const struct file_operations rs_sta_dbgfs_stats_table_ops = { | |
3808 | .read = rs_sta_dbgfs_stats_table_read, | |
3809 | .open = simple_open, | |
3810 | .llseek = default_llseek, | |
3811 | }; | |
3812 | ||
757cf23b ES |
3813 | static ssize_t rs_sta_dbgfs_drv_tx_stats_read(struct file *file, |
3814 | char __user *user_buf, | |
3815 | size_t count, loff_t *ppos) | |
3816 | { | |
3817 | static const char * const column_name[] = { | |
3818 | [RS_COLUMN_LEGACY_ANT_A] = "LEGACY_ANT_A", | |
3819 | [RS_COLUMN_LEGACY_ANT_B] = "LEGACY_ANT_B", | |
3820 | [RS_COLUMN_SISO_ANT_A] = "SISO_ANT_A", | |
3821 | [RS_COLUMN_SISO_ANT_B] = "SISO_ANT_B", | |
3822 | [RS_COLUMN_SISO_ANT_A_SGI] = "SISO_ANT_A_SGI", | |
3823 | [RS_COLUMN_SISO_ANT_B_SGI] = "SISO_ANT_B_SGI", | |
3824 | [RS_COLUMN_MIMO2] = "MIMO2", | |
3825 | [RS_COLUMN_MIMO2_SGI] = "MIMO2_SGI", | |
3826 | }; | |
3827 | ||
3828 | static const char * const rate_name[] = { | |
3829 | [IWL_RATE_1M_INDEX] = "1M", | |
3830 | [IWL_RATE_2M_INDEX] = "2M", | |
3831 | [IWL_RATE_5M_INDEX] = "5.5M", | |
3832 | [IWL_RATE_11M_INDEX] = "11M", | |
3833 | [IWL_RATE_6M_INDEX] = "6M|MCS0", | |
3834 | [IWL_RATE_9M_INDEX] = "9M", | |
3835 | [IWL_RATE_12M_INDEX] = "12M|MCS1", | |
3836 | [IWL_RATE_18M_INDEX] = "18M|MCS2", | |
3837 | [IWL_RATE_24M_INDEX] = "24M|MCS3", | |
3838 | [IWL_RATE_36M_INDEX] = "36M|MCS4", | |
3839 | [IWL_RATE_48M_INDEX] = "48M|MCS5", | |
3840 | [IWL_RATE_54M_INDEX] = "54M|MCS6", | |
3841 | [IWL_RATE_MCS_7_INDEX] = "MCS7", | |
3842 | [IWL_RATE_MCS_8_INDEX] = "MCS8", | |
3843 | [IWL_RATE_MCS_9_INDEX] = "MCS9", | |
3844 | }; | |
3845 | ||
3846 | char *buff, *pos, *endpos; | |
3847 | int col, rate; | |
3848 | ssize_t ret; | |
3849 | struct iwl_lq_sta *lq_sta = file->private_data; | |
3850 | struct rs_rate_stats *stats; | |
3851 | static const size_t bufsz = 1024; | |
3852 | ||
3853 | buff = kmalloc(bufsz, GFP_KERNEL); | |
3854 | if (!buff) | |
3855 | return -ENOMEM; | |
3856 | ||
3857 | pos = buff; | |
3858 | endpos = pos + bufsz; | |
3859 | ||
3860 | pos += scnprintf(pos, endpos - pos, "COLUMN,"); | |
3861 | for (rate = 0; rate < IWL_RATE_COUNT; rate++) | |
3862 | pos += scnprintf(pos, endpos - pos, "%s,", rate_name[rate]); | |
3863 | pos += scnprintf(pos, endpos - pos, "\n"); | |
3864 | ||
3865 | for (col = 0; col < RS_COLUMN_COUNT; col++) { | |
3866 | pos += scnprintf(pos, endpos - pos, | |
3867 | "%s,", column_name[col]); | |
3868 | ||
3869 | for (rate = 0; rate < IWL_RATE_COUNT; rate++) { | |
f58220f6 | 3870 | stats = &(lq_sta->pers.tx_stats[col][rate]); |
757cf23b ES |
3871 | pos += scnprintf(pos, endpos - pos, |
3872 | "%llu/%llu,", | |
3873 | stats->success, | |
3874 | stats->total); | |
3875 | } | |
3876 | pos += scnprintf(pos, endpos - pos, "\n"); | |
3877 | } | |
3878 | ||
3879 | ret = simple_read_from_buffer(user_buf, count, ppos, buff, pos - buff); | |
3880 | kfree(buff); | |
3881 | return ret; | |
3882 | } | |
3883 | ||
3884 | static ssize_t rs_sta_dbgfs_drv_tx_stats_write(struct file *file, | |
3885 | const char __user *user_buf, | |
3886 | size_t count, loff_t *ppos) | |
3887 | { | |
3888 | struct iwl_lq_sta *lq_sta = file->private_data; | |
f58220f6 | 3889 | memset(lq_sta->pers.tx_stats, 0, sizeof(lq_sta->pers.tx_stats)); |
757cf23b ES |
3890 | |
3891 | return count; | |
3892 | } | |
3893 | ||
3894 | static const struct file_operations rs_sta_dbgfs_drv_tx_stats_ops = { | |
3895 | .read = rs_sta_dbgfs_drv_tx_stats_read, | |
3896 | .write = rs_sta_dbgfs_drv_tx_stats_write, | |
3897 | .open = simple_open, | |
3898 | .llseek = default_llseek, | |
3899 | }; | |
3900 | ||
1e9c62fa ES |
3901 | static ssize_t iwl_dbgfs_ss_force_read(struct file *file, |
3902 | char __user *user_buf, | |
3903 | size_t count, loff_t *ppos) | |
3904 | { | |
3905 | struct iwl_lq_sta *lq_sta = file->private_data; | |
3906 | char buf[12]; | |
3907 | int bufsz = sizeof(buf); | |
3908 | int pos = 0; | |
3909 | static const char * const ss_force_name[] = { | |
3910 | [RS_SS_FORCE_NONE] = "none", | |
3911 | [RS_SS_FORCE_STBC] = "stbc", | |
3912 | [RS_SS_FORCE_BFER] = "bfer", | |
3913 | [RS_SS_FORCE_SISO] = "siso", | |
3914 | }; | |
3915 | ||
3916 | pos += scnprintf(buf+pos, bufsz-pos, "%s\n", | |
878985ce | 3917 | ss_force_name[lq_sta->pers.ss_force]); |
1e9c62fa ES |
3918 | return simple_read_from_buffer(user_buf, count, ppos, buf, pos); |
3919 | } | |
3920 | ||
3921 | static ssize_t iwl_dbgfs_ss_force_write(struct iwl_lq_sta *lq_sta, char *buf, | |
3922 | size_t count, loff_t *ppos) | |
3923 | { | |
3924 | struct iwl_mvm *mvm = lq_sta->pers.drv; | |
3925 | int ret = 0; | |
3926 | ||
3927 | if (!strncmp("none", buf, 4)) { | |
878985ce | 3928 | lq_sta->pers.ss_force = RS_SS_FORCE_NONE; |
1e9c62fa | 3929 | } else if (!strncmp("siso", buf, 4)) { |
878985ce | 3930 | lq_sta->pers.ss_force = RS_SS_FORCE_SISO; |
1e9c62fa ES |
3931 | } else if (!strncmp("stbc", buf, 4)) { |
3932 | if (lq_sta->stbc_capable) { | |
878985ce | 3933 | lq_sta->pers.ss_force = RS_SS_FORCE_STBC; |
1e9c62fa ES |
3934 | } else { |
3935 | IWL_ERR(mvm, | |
3936 | "can't force STBC. peer doesn't support\n"); | |
3937 | ret = -EINVAL; | |
3938 | } | |
3939 | } else if (!strncmp("bfer", buf, 4)) { | |
3940 | if (lq_sta->bfer_capable) { | |
878985ce | 3941 | lq_sta->pers.ss_force = RS_SS_FORCE_BFER; |
1e9c62fa ES |
3942 | } else { |
3943 | IWL_ERR(mvm, | |
3944 | "can't force BFER. peer doesn't support\n"); | |
3945 | ret = -EINVAL; | |
3946 | } | |
3947 | } else { | |
3948 | IWL_ERR(mvm, "valid values none|siso|stbc|bfer\n"); | |
3949 | ret = -EINVAL; | |
3950 | } | |
3951 | return ret ?: count; | |
3952 | } | |
3953 | ||
3954 | #define MVM_DEBUGFS_READ_WRITE_FILE_OPS(name, bufsz) \ | |
3955 | _MVM_DEBUGFS_READ_WRITE_FILE_OPS(name, bufsz, struct iwl_lq_sta) | |
3956 | #define MVM_DEBUGFS_ADD_FILE_RS(name, parent, mode) do { \ | |
3957 | if (!debugfs_create_file(#name, mode, parent, lq_sta, \ | |
3958 | &iwl_dbgfs_##name##_ops)) \ | |
3959 | goto err; \ | |
3960 | } while (0) | |
3961 | ||
3962 | MVM_DEBUGFS_READ_WRITE_FILE_OPS(ss_force, 32); | |
3963 | ||
dcbc17ad | 3964 | static void rs_add_debugfs(void *mvm, void *priv_sta, struct dentry *dir) |
8ca151b5 | 3965 | { |
dcbc17ad JB |
3966 | struct iwl_lq_sta *lq_sta = priv_sta; |
3967 | struct iwl_mvm_sta *mvmsta; | |
3968 | ||
3969 | mvmsta = container_of(lq_sta, struct iwl_mvm_sta, lq_sta); | |
3970 | ||
3971 | if (!mvmsta->vif) | |
3972 | return; | |
1e9c62fa | 3973 | |
c6e1faad EP |
3974 | debugfs_create_file("rate_scale_table", S_IRUSR | S_IWUSR, dir, |
3975 | lq_sta, &rs_sta_dbgfs_scale_table_ops); | |
3976 | debugfs_create_file("rate_stats_table", S_IRUSR, dir, | |
3977 | lq_sta, &rs_sta_dbgfs_stats_table_ops); | |
3978 | debugfs_create_file("drv_tx_stats", S_IRUSR | S_IWUSR, dir, | |
3979 | lq_sta, &rs_sta_dbgfs_drv_tx_stats_ops); | |
3980 | debugfs_create_u8("tx_agg_tid_enable", S_IRUSR | S_IWUSR, dir, | |
3981 | &lq_sta->tx_agg_tid_en); | |
3982 | debugfs_create_u8("reduced_tpc", S_IRUSR | S_IWUSR, dir, | |
3983 | &lq_sta->pers.dbg_fixed_txp_reduction); | |
1e9c62fa ES |
3984 | |
3985 | MVM_DEBUGFS_ADD_FILE_RS(ss_force, dir, S_IRUSR | S_IWUSR); | |
3986 | return; | |
3987 | err: | |
3988 | IWL_ERR((struct iwl_mvm *)mvm, "Can't create debugfs entity\n"); | |
8ca151b5 JB |
3989 | } |
3990 | ||
3991 | static void rs_remove_debugfs(void *mvm, void *mvm_sta) | |
3992 | { | |
8ca151b5 JB |
3993 | } |
3994 | #endif | |
3995 | ||
3996 | /* | |
3997 | * Initialization of rate scaling information is done by driver after | |
3998 | * the station is added. Since mac80211 calls this function before a | |
3999 | * station is added we ignore it. | |
4000 | */ | |
4001 | static void rs_rate_init_stub(void *mvm_r, | |
3de805cf SW |
4002 | struct ieee80211_supported_band *sband, |
4003 | struct cfg80211_chan_def *chandef, | |
4004 | struct ieee80211_sta *sta, void *mvm_sta) | |
8ca151b5 JB |
4005 | { |
4006 | } | |
631ad703 JB |
4007 | |
4008 | static const struct rate_control_ops rs_mvm_ops = { | |
8ca151b5 | 4009 | .name = RS_NAME, |
1ebc8f2e | 4010 | .tx_status = rs_mac80211_tx_status, |
8ca151b5 JB |
4011 | .get_rate = rs_get_rate, |
4012 | .rate_init = rs_rate_init_stub, | |
4013 | .alloc = rs_alloc, | |
4014 | .free = rs_free, | |
4015 | .alloc_sta = rs_alloc_sta, | |
4016 | .free_sta = rs_free_sta, | |
b87c2179 | 4017 | .rate_update = rs_rate_update, |
8ca151b5 JB |
4018 | #ifdef CONFIG_MAC80211_DEBUGFS |
4019 | .add_sta_debugfs = rs_add_debugfs, | |
4020 | .remove_sta_debugfs = rs_remove_debugfs, | |
4021 | #endif | |
4022 | }; | |
4023 | ||
4024 | int iwl_mvm_rate_control_register(void) | |
4025 | { | |
4026 | return ieee80211_rate_control_register(&rs_mvm_ops); | |
4027 | } | |
4028 | ||
4029 | void iwl_mvm_rate_control_unregister(void) | |
4030 | { | |
4031 | ieee80211_rate_control_unregister(&rs_mvm_ops); | |
4032 | } | |
9ee718aa EL |
4033 | |
4034 | /** | |
4035 | * iwl_mvm_tx_protection - Gets LQ command, change it to enable/disable | |
0d365ae5 | 4036 | * Tx protection, according to this request and previous requests, |
9ee718aa | 4037 | * and send the LQ command. |
9ee718aa EL |
4038 | * @mvmsta: The station |
4039 | * @enable: Enable Tx protection? | |
4040 | */ | |
e126b5d9 JB |
4041 | int iwl_mvm_tx_protection(struct iwl_mvm *mvm, struct iwl_mvm_sta *mvmsta, |
4042 | bool enable) | |
9ee718aa | 4043 | { |
e126b5d9 JB |
4044 | struct iwl_lq_cmd *lq = &mvmsta->lq_sta.lq; |
4045 | ||
9ee718aa EL |
4046 | lockdep_assert_held(&mvm->mutex); |
4047 | ||
4048 | if (enable) { | |
4049 | if (mvmsta->tx_protection == 0) | |
d307ec8d | 4050 | lq->flags |= LQ_FLAG_USE_RTS_MSK; |
9ee718aa EL |
4051 | mvmsta->tx_protection++; |
4052 | } else { | |
4053 | mvmsta->tx_protection--; | |
4054 | if (mvmsta->tx_protection == 0) | |
d307ec8d | 4055 | lq->flags &= ~LQ_FLAG_USE_RTS_MSK; |
9ee718aa EL |
4056 | } |
4057 | ||
9e680946 | 4058 | return iwl_mvm_send_lq_cmd(mvm, lq, false); |
9ee718aa | 4059 | } |