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8ca151b5 JB |
1 | /****************************************************************************** |
2 | * | |
51368bf7 | 3 | * Copyright(c) 2005 - 2014 Intel Corporation. All rights reserved. |
fcc5e851 | 4 | * Copyright(c) 2013 - 2015 Intel Mobile Communications GmbH |
8ca151b5 JB |
5 | * |
6 | * This program is free software; you can redistribute it and/or modify it | |
7 | * under the terms of version 2 of the GNU General Public License as | |
8 | * published by the Free Software Foundation. | |
9 | * | |
10 | * This program is distributed in the hope that it will be useful, but WITHOUT | |
11 | * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or | |
12 | * FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License for | |
13 | * more details. | |
14 | * | |
15 | * You should have received a copy of the GNU General Public License along with | |
16 | * this program; if not, write to the Free Software Foundation, Inc., | |
17 | * 51 Franklin Street, Fifth Floor, Boston, MA 02110, USA | |
18 | * | |
19 | * The full GNU General Public License is included in this distribution in the | |
20 | * file called LICENSE. | |
21 | * | |
22 | * Contact Information: | |
23 | * Intel Linux Wireless <ilw@linux.intel.com> | |
24 | * Intel Corporation, 5200 N.E. Elam Young Parkway, Hillsboro, OR 97124-6497 | |
25 | * | |
26 | *****************************************************************************/ | |
27 | #include <linux/kernel.h> | |
8ca151b5 JB |
28 | #include <linux/skbuff.h> |
29 | #include <linux/slab.h> | |
30 | #include <net/mac80211.h> | |
31 | ||
32 | #include <linux/netdevice.h> | |
33 | #include <linux/etherdevice.h> | |
34 | #include <linux/delay.h> | |
35 | ||
36 | #include <linux/workqueue.h> | |
37 | #include "rs.h" | |
38 | #include "fw-api.h" | |
39 | #include "sta.h" | |
40 | #include "iwl-op-mode.h" | |
41 | #include "mvm.h" | |
1e9c62fa | 42 | #include "debugfs.h" |
8ca151b5 JB |
43 | |
44 | #define RS_NAME "iwl-mvm-rs" | |
45 | ||
8ca151b5 | 46 | #define IWL_RATE_MAX_WINDOW 62 /* # tx in history window */ |
8ca151b5 | 47 | |
834437da ES |
48 | /* Calculations of success ratio are done in fixed point where 12800 is 100%. |
49 | * Use this macro when dealing with thresholds consts set as a percentage | |
50 | */ | |
51 | #define RS_PERCENT(x) (128 * x) | |
8ca151b5 JB |
52 | |
53 | static u8 rs_ht_to_legacy[] = { | |
da87d7d5 ES |
54 | [IWL_RATE_MCS_0_INDEX] = IWL_RATE_6M_INDEX, |
55 | [IWL_RATE_MCS_1_INDEX] = IWL_RATE_9M_INDEX, | |
56 | [IWL_RATE_MCS_2_INDEX] = IWL_RATE_12M_INDEX, | |
57 | [IWL_RATE_MCS_3_INDEX] = IWL_RATE_18M_INDEX, | |
58 | [IWL_RATE_MCS_4_INDEX] = IWL_RATE_24M_INDEX, | |
59 | [IWL_RATE_MCS_5_INDEX] = IWL_RATE_36M_INDEX, | |
60 | [IWL_RATE_MCS_6_INDEX] = IWL_RATE_48M_INDEX, | |
61 | [IWL_RATE_MCS_7_INDEX] = IWL_RATE_54M_INDEX, | |
62 | [IWL_RATE_MCS_8_INDEX] = IWL_RATE_54M_INDEX, | |
63 | [IWL_RATE_MCS_9_INDEX] = IWL_RATE_54M_INDEX, | |
8ca151b5 JB |
64 | }; |
65 | ||
66 | static const u8 ant_toggle_lookup[] = { | |
ef4394b9 EP |
67 | [ANT_NONE] = ANT_NONE, |
68 | [ANT_A] = ANT_B, | |
69 | [ANT_B] = ANT_C, | |
70 | [ANT_AB] = ANT_BC, | |
71 | [ANT_C] = ANT_A, | |
72 | [ANT_AC] = ANT_AB, | |
73 | [ANT_BC] = ANT_AC, | |
74 | [ANT_ABC] = ANT_ABC, | |
8ca151b5 JB |
75 | }; |
76 | ||
d310e405 ES |
77 | #define IWL_DECLARE_RATE_INFO(r, s, rp, rn) \ |
78 | [IWL_RATE_##r##M_INDEX] = { IWL_RATE_##r##M_PLCP, \ | |
79 | IWL_RATE_HT_SISO_MCS_##s##_PLCP, \ | |
80 | IWL_RATE_HT_MIMO2_MCS_##s##_PLCP, \ | |
81 | IWL_RATE_VHT_SISO_MCS_##s##_PLCP, \ | |
82 | IWL_RATE_VHT_MIMO2_MCS_##s##_PLCP,\ | |
83 | IWL_RATE_##rp##M_INDEX, \ | |
ab055ce9 | 84 | IWL_RATE_##rn##M_INDEX } |
8ca151b5 | 85 | |
d310e405 ES |
86 | #define IWL_DECLARE_MCS_RATE(s) \ |
87 | [IWL_RATE_MCS_##s##_INDEX] = { IWL_RATE_INVM_PLCP, \ | |
88 | IWL_RATE_HT_SISO_MCS_##s##_PLCP, \ | |
89 | IWL_RATE_HT_MIMO2_MCS_##s##_PLCP, \ | |
90 | IWL_RATE_VHT_SISO_MCS_##s##_PLCP, \ | |
91 | IWL_RATE_VHT_MIMO2_MCS_##s##_PLCP, \ | |
92 | IWL_RATE_INVM_INDEX, \ | |
93 | IWL_RATE_INVM_INDEX } | |
94 | ||
8ca151b5 JB |
95 | /* |
96 | * Parameter order: | |
ab055ce9 | 97 | * rate, ht rate, prev rate, next rate |
8ca151b5 JB |
98 | * |
99 | * If there isn't a valid next or previous rate then INV is used which | |
100 | * maps to IWL_RATE_INVALID | |
101 | * | |
102 | */ | |
103 | static const struct iwl_rs_rate_info iwl_rates[IWL_RATE_COUNT] = { | |
ab055ce9 ES |
104 | IWL_DECLARE_RATE_INFO(1, INV, INV, 2), /* 1mbps */ |
105 | IWL_DECLARE_RATE_INFO(2, INV, 1, 5), /* 2mbps */ | |
106 | IWL_DECLARE_RATE_INFO(5, INV, 2, 11), /*5.5mbps */ | |
107 | IWL_DECLARE_RATE_INFO(11, INV, 9, 12), /* 11mbps */ | |
d310e405 ES |
108 | IWL_DECLARE_RATE_INFO(6, 0, 5, 11), /* 6mbps ; MCS 0 */ |
109 | IWL_DECLARE_RATE_INFO(9, INV, 6, 11), /* 9mbps */ | |
110 | IWL_DECLARE_RATE_INFO(12, 1, 11, 18), /* 12mbps ; MCS 1 */ | |
111 | IWL_DECLARE_RATE_INFO(18, 2, 12, 24), /* 18mbps ; MCS 2 */ | |
112 | IWL_DECLARE_RATE_INFO(24, 3, 18, 36), /* 24mbps ; MCS 3 */ | |
113 | IWL_DECLARE_RATE_INFO(36, 4, 24, 48), /* 36mbps ; MCS 4 */ | |
114 | IWL_DECLARE_RATE_INFO(48, 5, 36, 54), /* 48mbps ; MCS 5 */ | |
115 | IWL_DECLARE_RATE_INFO(54, 6, 48, INV), /* 54mbps ; MCS 6 */ | |
116 | IWL_DECLARE_MCS_RATE(7), /* MCS 7 */ | |
117 | IWL_DECLARE_MCS_RATE(8), /* MCS 8 */ | |
118 | IWL_DECLARE_MCS_RATE(9), /* MCS 9 */ | |
8ca151b5 JB |
119 | }; |
120 | ||
4e4b815c ES |
121 | enum rs_action { |
122 | RS_ACTION_STAY = 0, | |
123 | RS_ACTION_DOWNSCALE = -1, | |
124 | RS_ACTION_UPSCALE = 1, | |
125 | }; | |
126 | ||
b3b06a32 ES |
127 | enum rs_column_mode { |
128 | RS_INVALID = 0, | |
129 | RS_LEGACY, | |
130 | RS_SISO, | |
131 | RS_MIMO2, | |
132 | }; | |
133 | ||
fd7dbee5 | 134 | #define MAX_NEXT_COLUMNS 7 |
b3b06a32 ES |
135 | #define MAX_COLUMN_CHECKS 3 |
136 | ||
0b8d17f3 ES |
137 | struct rs_tx_column; |
138 | ||
b3b06a32 ES |
139 | typedef bool (*allow_column_func_t) (struct iwl_mvm *mvm, |
140 | struct ieee80211_sta *sta, | |
bb8f44c9 | 141 | struct rs_rate *rate, |
0b8d17f3 | 142 | const struct rs_tx_column *next_col); |
b3b06a32 ES |
143 | |
144 | struct rs_tx_column { | |
145 | enum rs_column_mode mode; | |
146 | u8 ant; | |
147 | bool sgi; | |
148 | enum rs_column next_columns[MAX_NEXT_COLUMNS]; | |
149 | allow_column_func_t checks[MAX_COLUMN_CHECKS]; | |
150 | }; | |
151 | ||
219fb66b | 152 | static bool rs_ant_allow(struct iwl_mvm *mvm, struct ieee80211_sta *sta, |
bb8f44c9 | 153 | struct rs_rate *rate, |
0b8d17f3 | 154 | const struct rs_tx_column *next_col) |
219fb66b | 155 | { |
0b8d17f3 | 156 | return iwl_mvm_bt_coex_is_ant_avail(mvm, next_col->ant); |
219fb66b EG |
157 | } |
158 | ||
b3b06a32 | 159 | static bool rs_mimo_allow(struct iwl_mvm *mvm, struct ieee80211_sta *sta, |
bb8f44c9 | 160 | struct rs_rate *rate, |
0b8d17f3 | 161 | const struct rs_tx_column *next_col) |
b3b06a32 | 162 | { |
7ac4a50a ES |
163 | struct iwl_mvm_sta *mvmsta; |
164 | struct iwl_mvm_vif *mvmvif; | |
165 | ||
b3b06a32 ES |
166 | if (!sta->ht_cap.ht_supported) |
167 | return false; | |
168 | ||
169 | if (sta->smps_mode == IEEE80211_SMPS_STATIC) | |
170 | return false; | |
171 | ||
a0544272 | 172 | if (num_of_ant(iwl_mvm_get_valid_tx_ant(mvm)) < 2) |
b3b06a32 ES |
173 | return false; |
174 | ||
175 | if (!iwl_mvm_bt_coex_is_mimo_allowed(mvm, sta)) | |
176 | return false; | |
177 | ||
7ac4a50a ES |
178 | mvmsta = iwl_mvm_sta_from_mac80211(sta); |
179 | mvmvif = iwl_mvm_vif_from_mac80211(mvmsta->vif); | |
783eaee6 AB |
180 | if (IWL_MVM_RS_DISABLE_P2P_MIMO && |
181 | iwl_mvm_vif_low_latency(mvmvif) && mvmsta->vif->p2p) | |
7ac4a50a ES |
182 | return false; |
183 | ||
5f0d98f2 EG |
184 | if (mvm->nvm_data->sku_cap_mimo_disabled) |
185 | return false; | |
186 | ||
b3b06a32 ES |
187 | return true; |
188 | } | |
189 | ||
190 | static bool rs_siso_allow(struct iwl_mvm *mvm, struct ieee80211_sta *sta, | |
bb8f44c9 | 191 | struct rs_rate *rate, |
0b8d17f3 | 192 | const struct rs_tx_column *next_col) |
b3b06a32 ES |
193 | { |
194 | if (!sta->ht_cap.ht_supported) | |
195 | return false; | |
196 | ||
197 | return true; | |
198 | } | |
199 | ||
200 | static bool rs_sgi_allow(struct iwl_mvm *mvm, struct ieee80211_sta *sta, | |
bb8f44c9 | 201 | struct rs_rate *rate, |
0b8d17f3 | 202 | const struct rs_tx_column *next_col) |
b3b06a32 | 203 | { |
b3b06a32 ES |
204 | struct ieee80211_sta_ht_cap *ht_cap = &sta->ht_cap; |
205 | struct ieee80211_sta_vht_cap *vht_cap = &sta->vht_cap; | |
206 | ||
207 | if (is_ht20(rate) && (ht_cap->cap & | |
208 | IEEE80211_HT_CAP_SGI_20)) | |
209 | return true; | |
210 | if (is_ht40(rate) && (ht_cap->cap & | |
211 | IEEE80211_HT_CAP_SGI_40)) | |
212 | return true; | |
213 | if (is_ht80(rate) && (vht_cap->cap & | |
214 | IEEE80211_VHT_CAP_SHORT_GI_80)) | |
215 | return true; | |
216 | ||
217 | return false; | |
218 | } | |
219 | ||
220 | static const struct rs_tx_column rs_tx_columns[] = { | |
221 | [RS_COLUMN_LEGACY_ANT_A] = { | |
222 | .mode = RS_LEGACY, | |
223 | .ant = ANT_A, | |
224 | .next_columns = { | |
225 | RS_COLUMN_LEGACY_ANT_B, | |
226 | RS_COLUMN_SISO_ANT_A, | |
31b20452 | 227 | RS_COLUMN_MIMO2, |
d8fff919 ES |
228 | RS_COLUMN_INVALID, |
229 | RS_COLUMN_INVALID, | |
fd7dbee5 ES |
230 | RS_COLUMN_INVALID, |
231 | RS_COLUMN_INVALID, | |
b3b06a32 | 232 | }, |
219fb66b EG |
233 | .checks = { |
234 | rs_ant_allow, | |
235 | }, | |
b3b06a32 ES |
236 | }, |
237 | [RS_COLUMN_LEGACY_ANT_B] = { | |
238 | .mode = RS_LEGACY, | |
239 | .ant = ANT_B, | |
240 | .next_columns = { | |
241 | RS_COLUMN_LEGACY_ANT_A, | |
242 | RS_COLUMN_SISO_ANT_B, | |
31b20452 | 243 | RS_COLUMN_MIMO2, |
d8fff919 ES |
244 | RS_COLUMN_INVALID, |
245 | RS_COLUMN_INVALID, | |
fd7dbee5 ES |
246 | RS_COLUMN_INVALID, |
247 | RS_COLUMN_INVALID, | |
b3b06a32 | 248 | }, |
219fb66b EG |
249 | .checks = { |
250 | rs_ant_allow, | |
251 | }, | |
b3b06a32 ES |
252 | }, |
253 | [RS_COLUMN_SISO_ANT_A] = { | |
254 | .mode = RS_SISO, | |
255 | .ant = ANT_A, | |
256 | .next_columns = { | |
257 | RS_COLUMN_SISO_ANT_B, | |
258 | RS_COLUMN_MIMO2, | |
259 | RS_COLUMN_SISO_ANT_A_SGI, | |
fd7dbee5 ES |
260 | RS_COLUMN_LEGACY_ANT_A, |
261 | RS_COLUMN_LEGACY_ANT_B, | |
d8fff919 | 262 | RS_COLUMN_INVALID, |
31b20452 | 263 | RS_COLUMN_INVALID, |
b3b06a32 ES |
264 | }, |
265 | .checks = { | |
266 | rs_siso_allow, | |
219fb66b | 267 | rs_ant_allow, |
b3b06a32 ES |
268 | }, |
269 | }, | |
270 | [RS_COLUMN_SISO_ANT_B] = { | |
271 | .mode = RS_SISO, | |
272 | .ant = ANT_B, | |
273 | .next_columns = { | |
274 | RS_COLUMN_SISO_ANT_A, | |
275 | RS_COLUMN_MIMO2, | |
276 | RS_COLUMN_SISO_ANT_B_SGI, | |
fd7dbee5 ES |
277 | RS_COLUMN_LEGACY_ANT_A, |
278 | RS_COLUMN_LEGACY_ANT_B, | |
d8fff919 | 279 | RS_COLUMN_INVALID, |
31b20452 | 280 | RS_COLUMN_INVALID, |
b3b06a32 ES |
281 | }, |
282 | .checks = { | |
283 | rs_siso_allow, | |
219fb66b | 284 | rs_ant_allow, |
b3b06a32 ES |
285 | }, |
286 | }, | |
287 | [RS_COLUMN_SISO_ANT_A_SGI] = { | |
288 | .mode = RS_SISO, | |
289 | .ant = ANT_A, | |
290 | .sgi = true, | |
291 | .next_columns = { | |
292 | RS_COLUMN_SISO_ANT_B_SGI, | |
293 | RS_COLUMN_MIMO2_SGI, | |
294 | RS_COLUMN_SISO_ANT_A, | |
fd7dbee5 ES |
295 | RS_COLUMN_LEGACY_ANT_A, |
296 | RS_COLUMN_LEGACY_ANT_B, | |
31b20452 ES |
297 | RS_COLUMN_INVALID, |
298 | RS_COLUMN_INVALID, | |
b3b06a32 ES |
299 | }, |
300 | .checks = { | |
301 | rs_siso_allow, | |
219fb66b | 302 | rs_ant_allow, |
b3b06a32 ES |
303 | rs_sgi_allow, |
304 | }, | |
305 | }, | |
306 | [RS_COLUMN_SISO_ANT_B_SGI] = { | |
307 | .mode = RS_SISO, | |
308 | .ant = ANT_B, | |
309 | .sgi = true, | |
310 | .next_columns = { | |
311 | RS_COLUMN_SISO_ANT_A_SGI, | |
312 | RS_COLUMN_MIMO2_SGI, | |
313 | RS_COLUMN_SISO_ANT_B, | |
fd7dbee5 ES |
314 | RS_COLUMN_LEGACY_ANT_A, |
315 | RS_COLUMN_LEGACY_ANT_B, | |
31b20452 ES |
316 | RS_COLUMN_INVALID, |
317 | RS_COLUMN_INVALID, | |
b3b06a32 ES |
318 | }, |
319 | .checks = { | |
320 | rs_siso_allow, | |
219fb66b | 321 | rs_ant_allow, |
b3b06a32 ES |
322 | rs_sgi_allow, |
323 | }, | |
324 | }, | |
325 | [RS_COLUMN_MIMO2] = { | |
326 | .mode = RS_MIMO2, | |
327 | .ant = ANT_AB, | |
328 | .next_columns = { | |
329 | RS_COLUMN_SISO_ANT_A, | |
330 | RS_COLUMN_MIMO2_SGI, | |
fd7dbee5 ES |
331 | RS_COLUMN_LEGACY_ANT_A, |
332 | RS_COLUMN_LEGACY_ANT_B, | |
31b20452 ES |
333 | RS_COLUMN_INVALID, |
334 | RS_COLUMN_INVALID, | |
335 | RS_COLUMN_INVALID, | |
b3b06a32 ES |
336 | }, |
337 | .checks = { | |
338 | rs_mimo_allow, | |
339 | }, | |
340 | }, | |
341 | [RS_COLUMN_MIMO2_SGI] = { | |
342 | .mode = RS_MIMO2, | |
343 | .ant = ANT_AB, | |
344 | .sgi = true, | |
345 | .next_columns = { | |
346 | RS_COLUMN_SISO_ANT_A_SGI, | |
347 | RS_COLUMN_MIMO2, | |
fd7dbee5 ES |
348 | RS_COLUMN_LEGACY_ANT_A, |
349 | RS_COLUMN_LEGACY_ANT_B, | |
31b20452 ES |
350 | RS_COLUMN_INVALID, |
351 | RS_COLUMN_INVALID, | |
352 | RS_COLUMN_INVALID, | |
b3b06a32 ES |
353 | }, |
354 | .checks = { | |
355 | rs_mimo_allow, | |
356 | rs_sgi_allow, | |
357 | }, | |
358 | }, | |
359 | }; | |
360 | ||
8ca151b5 JB |
361 | static inline u8 rs_extract_rate(u32 rate_n_flags) |
362 | { | |
363 | /* also works for HT because bits 7:6 are zero there */ | |
364 | return (u8)(rate_n_flags & RATE_LEGACY_RATE_MSK); | |
365 | } | |
366 | ||
367 | static int iwl_hwrate_to_plcp_idx(u32 rate_n_flags) | |
368 | { | |
369 | int idx = 0; | |
370 | ||
8ca151b5 | 371 | if (rate_n_flags & RATE_MCS_HT_MSK) { |
d310e405 ES |
372 | idx = rate_n_flags & RATE_HT_MCS_RATE_CODE_MSK; |
373 | idx += IWL_RATE_MCS_0_INDEX; | |
8ca151b5 | 374 | |
d310e405 | 375 | /* skip 9M not supported in HT*/ |
8ca151b5 JB |
376 | if (idx >= IWL_RATE_9M_INDEX) |
377 | idx += 1; | |
4e82dd3a | 378 | if ((idx >= IWL_FIRST_HT_RATE) && (idx <= IWL_LAST_HT_RATE)) |
8ca151b5 | 379 | return idx; |
d310e405 ES |
380 | } else if (rate_n_flags & RATE_MCS_VHT_MSK) { |
381 | idx = rate_n_flags & RATE_VHT_MCS_RATE_CODE_MSK; | |
382 | idx += IWL_RATE_MCS_0_INDEX; | |
8ca151b5 | 383 | |
d310e405 ES |
384 | /* skip 9M not supported in VHT*/ |
385 | if (idx >= IWL_RATE_9M_INDEX) | |
386 | idx++; | |
387 | if ((idx >= IWL_FIRST_VHT_RATE) && (idx <= IWL_LAST_VHT_RATE)) | |
388 | return idx; | |
8ca151b5 | 389 | } else { |
d310e405 ES |
390 | /* legacy rate format, search for match in table */ |
391 | ||
392 | u8 legacy_rate = rs_extract_rate(rate_n_flags); | |
8ca151b5 | 393 | for (idx = 0; idx < ARRAY_SIZE(iwl_rates); idx++) |
d310e405 | 394 | if (iwl_rates[idx].plcp == legacy_rate) |
8ca151b5 JB |
395 | return idx; |
396 | } | |
397 | ||
560843f4 | 398 | return IWL_RATE_INVALID; |
8ca151b5 JB |
399 | } |
400 | ||
401 | static void rs_rate_scale_perform(struct iwl_mvm *mvm, | |
1ebc8f2e ES |
402 | struct ieee80211_sta *sta, |
403 | struct iwl_lq_sta *lq_sta, | |
404 | int tid); | |
8fc7c58c ES |
405 | static void rs_fill_lq_cmd(struct iwl_mvm *mvm, |
406 | struct ieee80211_sta *sta, | |
407 | struct iwl_lq_sta *lq_sta, | |
408 | const struct rs_rate *initial_rate); | |
8ca151b5 | 409 | static void rs_stay_in_table(struct iwl_lq_sta *lq_sta, bool force_search); |
8ca151b5 | 410 | |
8ca151b5 JB |
411 | /** |
412 | * The following tables contain the expected throughput metrics for all rates | |
413 | * | |
414 | * 1, 2, 5.5, 11, 6, 9, 12, 18, 24, 36, 48, 54, 60 MBits | |
415 | * | |
416 | * where invalid entries are zeros. | |
417 | * | |
418 | * CCK rates are only valid in legacy table and will only be used in G | |
419 | * (2.4 GHz) band. | |
420 | */ | |
421 | ||
a34529e8 | 422 | static const u16 expected_tpt_legacy[IWL_RATE_COUNT] = { |
4e82dd3a | 423 | 7, 13, 35, 58, 40, 57, 72, 98, 121, 154, 177, 186, 0, 0, 0 |
8ca151b5 JB |
424 | }; |
425 | ||
4e82dd3a ES |
426 | /* Expected TpT tables. 4 indexes: |
427 | * 0 - NGI, 1 - SGI, 2 - AGG+NGI, 3 - AGG+SGI | |
428 | */ | |
a34529e8 | 429 | static const u16 expected_tpt_siso_20MHz[4][IWL_RATE_COUNT] = { |
4e82dd3a ES |
430 | {0, 0, 0, 0, 42, 0, 76, 102, 124, 159, 183, 193, 202, 216, 0}, |
431 | {0, 0, 0, 0, 46, 0, 82, 110, 132, 168, 192, 202, 210, 225, 0}, | |
432 | {0, 0, 0, 0, 49, 0, 97, 145, 192, 285, 375, 420, 464, 551, 0}, | |
433 | {0, 0, 0, 0, 54, 0, 108, 160, 213, 315, 415, 465, 513, 608, 0}, | |
8ca151b5 JB |
434 | }; |
435 | ||
a34529e8 | 436 | static const u16 expected_tpt_siso_40MHz[4][IWL_RATE_COUNT] = { |
4e82dd3a ES |
437 | {0, 0, 0, 0, 77, 0, 127, 160, 184, 220, 242, 250, 257, 269, 275}, |
438 | {0, 0, 0, 0, 83, 0, 135, 169, 193, 229, 250, 257, 264, 275, 280}, | |
439 | {0, 0, 0, 0, 101, 0, 199, 295, 389, 570, 744, 828, 911, 1070, 1173}, | |
440 | {0, 0, 0, 0, 112, 0, 220, 326, 429, 629, 819, 912, 1000, 1173, 1284}, | |
8ca151b5 JB |
441 | }; |
442 | ||
a34529e8 | 443 | static const u16 expected_tpt_siso_80MHz[4][IWL_RATE_COUNT] = { |
d310e405 ES |
444 | {0, 0, 0, 0, 130, 0, 191, 223, 244, 273, 288, 294, 298, 305, 308}, |
445 | {0, 0, 0, 0, 138, 0, 200, 231, 251, 279, 293, 298, 302, 308, 312}, | |
446 | {0, 0, 0, 0, 217, 0, 429, 634, 834, 1220, 1585, 1760, 1931, 2258, 2466}, | |
447 | {0, 0, 0, 0, 241, 0, 475, 701, 921, 1343, 1741, 1931, 2117, 2468, 2691}, | |
448 | }; | |
449 | ||
a34529e8 | 450 | static const u16 expected_tpt_mimo2_20MHz[4][IWL_RATE_COUNT] = { |
4e82dd3a ES |
451 | {0, 0, 0, 0, 74, 0, 123, 155, 179, 213, 235, 243, 250, 261, 0}, |
452 | {0, 0, 0, 0, 81, 0, 131, 164, 187, 221, 242, 250, 256, 267, 0}, | |
453 | {0, 0, 0, 0, 98, 0, 193, 286, 375, 550, 718, 799, 878, 1032, 0}, | |
454 | {0, 0, 0, 0, 109, 0, 214, 316, 414, 607, 790, 879, 965, 1132, 0}, | |
8ca151b5 JB |
455 | }; |
456 | ||
a34529e8 | 457 | static const u16 expected_tpt_mimo2_40MHz[4][IWL_RATE_COUNT] = { |
4e82dd3a ES |
458 | {0, 0, 0, 0, 123, 0, 182, 214, 235, 264, 279, 285, 289, 296, 300}, |
459 | {0, 0, 0, 0, 131, 0, 191, 222, 242, 270, 284, 289, 293, 300, 303}, | |
460 | {0, 0, 0, 0, 200, 0, 390, 571, 741, 1067, 1365, 1505, 1640, 1894, 2053}, | |
461 | {0, 0, 0, 0, 221, 0, 430, 630, 816, 1169, 1490, 1641, 1784, 2053, 2221}, | |
8ca151b5 JB |
462 | }; |
463 | ||
a34529e8 | 464 | static const u16 expected_tpt_mimo2_80MHz[4][IWL_RATE_COUNT] = { |
d310e405 ES |
465 | {0, 0, 0, 0, 182, 0, 240, 264, 278, 299, 308, 311, 313, 317, 319}, |
466 | {0, 0, 0, 0, 190, 0, 247, 269, 282, 302, 310, 313, 315, 319, 320}, | |
467 | {0, 0, 0, 0, 428, 0, 833, 1215, 1577, 2254, 2863, 3147, 3418, 3913, 4219}, | |
468 | {0, 0, 0, 0, 474, 0, 920, 1338, 1732, 2464, 3116, 3418, 3705, 4225, 4545}, | |
469 | }; | |
470 | ||
8ca151b5 JB |
471 | /* mbps, mcs */ |
472 | static const struct iwl_rate_mcs_info iwl_rate_mcs[IWL_RATE_COUNT] = { | |
473 | { "1", "BPSK DSSS"}, | |
474 | { "2", "QPSK DSSS"}, | |
475 | {"5.5", "BPSK CCK"}, | |
476 | { "11", "QPSK CCK"}, | |
477 | { "6", "BPSK 1/2"}, | |
478 | { "9", "BPSK 1/2"}, | |
479 | { "12", "QPSK 1/2"}, | |
480 | { "18", "QPSK 3/4"}, | |
481 | { "24", "16QAM 1/2"}, | |
482 | { "36", "16QAM 3/4"}, | |
483 | { "48", "64QAM 2/3"}, | |
484 | { "54", "64QAM 3/4"}, | |
485 | { "60", "64QAM 5/6"}, | |
486 | }; | |
487 | ||
488 | #define MCS_INDEX_PER_STREAM (8) | |
489 | ||
9d10849e EG |
490 | static const char *rs_pretty_ant(u8 ant) |
491 | { | |
492 | static const char * const ant_name[] = { | |
493 | [ANT_NONE] = "None", | |
494 | [ANT_A] = "A", | |
495 | [ANT_B] = "B", | |
496 | [ANT_AB] = "AB", | |
497 | [ANT_C] = "C", | |
498 | [ANT_AC] = "AC", | |
499 | [ANT_BC] = "BC", | |
500 | [ANT_ABC] = "ABC", | |
501 | }; | |
502 | ||
503 | if (ant > ANT_ABC) | |
504 | return "UNKNOWN"; | |
505 | ||
506 | return ant_name[ant]; | |
507 | } | |
508 | ||
509 | static const char *rs_pretty_lq_type(enum iwl_table_type type) | |
510 | { | |
511 | static const char * const lq_types[] = { | |
512 | [LQ_NONE] = "NONE", | |
513 | [LQ_LEGACY_A] = "LEGACY_A", | |
514 | [LQ_LEGACY_G] = "LEGACY_G", | |
515 | [LQ_HT_SISO] = "HT SISO", | |
516 | [LQ_HT_MIMO2] = "HT MIMO", | |
517 | [LQ_VHT_SISO] = "VHT SISO", | |
518 | [LQ_VHT_MIMO2] = "VHT MIMO", | |
519 | }; | |
520 | ||
521 | if (type < LQ_NONE || type >= LQ_MAX) | |
522 | return "UNKNOWN"; | |
523 | ||
524 | return lq_types[type]; | |
525 | } | |
526 | ||
5aa33553 ES |
527 | static inline void rs_dump_rate(struct iwl_mvm *mvm, const struct rs_rate *rate, |
528 | const char *prefix) | |
529 | { | |
d8bafeaf | 530 | IWL_DEBUG_RATE(mvm, |
26a2cc01 | 531 | "%s: (%s: %d) ANT: %s BW: %d SGI: %d LDPC: %d STBC: %d\n", |
5aa33553 ES |
532 | prefix, rs_pretty_lq_type(rate->type), |
533 | rate->index, rs_pretty_ant(rate->ant), | |
d8bafeaf | 534 | rate->bw, rate->sgi, rate->ldpc, rate->stbc); |
5aa33553 ES |
535 | } |
536 | ||
8ca151b5 JB |
537 | static void rs_rate_scale_clear_window(struct iwl_rate_scale_data *window) |
538 | { | |
539 | window->data = 0; | |
540 | window->success_counter = 0; | |
541 | window->success_ratio = IWL_INVALID_VALUE; | |
542 | window->counter = 0; | |
543 | window->average_tpt = IWL_INVALID_VALUE; | |
8ca151b5 JB |
544 | } |
545 | ||
b804eeb6 ES |
546 | static void rs_rate_scale_clear_tbl_windows(struct iwl_mvm *mvm, |
547 | struct iwl_scale_tbl_info *tbl) | |
3ca71f60 EP |
548 | { |
549 | int i; | |
550 | ||
b804eeb6 | 551 | IWL_DEBUG_RATE(mvm, "Clearing up window stats\n"); |
3ca71f60 EP |
552 | for (i = 0; i < IWL_RATE_COUNT; i++) |
553 | rs_rate_scale_clear_window(&tbl->win[i]); | |
2fd647f8 EP |
554 | |
555 | for (i = 0; i < ARRAY_SIZE(tbl->tpc_win); i++) | |
556 | rs_rate_scale_clear_window(&tbl->tpc_win[i]); | |
3ca71f60 EP |
557 | } |
558 | ||
8ca151b5 JB |
559 | static inline u8 rs_is_valid_ant(u8 valid_antenna, u8 ant_type) |
560 | { | |
561 | return (ant_type & valid_antenna) == ant_type; | |
562 | } | |
563 | ||
8ca151b5 JB |
564 | static int rs_tl_turn_on_agg_for_tid(struct iwl_mvm *mvm, |
565 | struct iwl_lq_sta *lq_data, u8 tid, | |
566 | struct ieee80211_sta *sta) | |
567 | { | |
568 | int ret = -EAGAIN; | |
8ca151b5 | 569 | |
44cc429c EG |
570 | IWL_DEBUG_HT(mvm, "Starting Tx agg: STA: %pM tid: %d\n", |
571 | sta->addr, tid); | |
572 | ret = ieee80211_start_tx_ba_session(sta, tid, 5000); | |
573 | if (ret == -EAGAIN) { | |
574 | /* | |
575 | * driver and mac80211 is out of sync | |
576 | * this might be cause by reloading firmware | |
577 | * stop the tx ba session here | |
578 | */ | |
579 | IWL_ERR(mvm, "Fail start Tx agg on tid: %d\n", | |
580 | tid); | |
581 | ieee80211_stop_tx_ba_session(sta, tid); | |
8ca151b5 JB |
582 | } |
583 | return ret; | |
584 | } | |
585 | ||
586 | static void rs_tl_turn_on_agg(struct iwl_mvm *mvm, u8 tid, | |
587 | struct iwl_lq_sta *lq_data, | |
588 | struct ieee80211_sta *sta) | |
589 | { | |
590 | if (tid < IWL_MAX_TID_COUNT) | |
591 | rs_tl_turn_on_agg_for_tid(mvm, lq_data, tid, sta); | |
592 | else | |
593 | IWL_ERR(mvm, "tid exceeds max TID count: %d/%d\n", | |
594 | tid, IWL_MAX_TID_COUNT); | |
595 | } | |
596 | ||
597 | static inline int get_num_of_ant_from_rate(u32 rate_n_flags) | |
598 | { | |
599 | return !!(rate_n_flags & RATE_MCS_ANT_A_MSK) + | |
600 | !!(rate_n_flags & RATE_MCS_ANT_B_MSK) + | |
601 | !!(rate_n_flags & RATE_MCS_ANT_C_MSK); | |
602 | } | |
603 | ||
604 | /* | |
605 | * Static function to get the expected throughput from an iwl_scale_tbl_info | |
606 | * that wraps a NULL pointer check | |
607 | */ | |
608 | static s32 get_expected_tpt(struct iwl_scale_tbl_info *tbl, int rs_index) | |
609 | { | |
610 | if (tbl->expected_tpt) | |
611 | return tbl->expected_tpt[rs_index]; | |
612 | return 0; | |
613 | } | |
614 | ||
615 | /** | |
616 | * rs_collect_tx_data - Update the success/failure sliding window | |
617 | * | |
618 | * We keep a sliding window of the last 62 packets transmitted | |
619 | * at this rate. window->data contains the bitmask of successful | |
620 | * packets. | |
621 | */ | |
834437da ES |
622 | static int _rs_collect_tx_data(struct iwl_mvm *mvm, |
623 | struct iwl_scale_tbl_info *tbl, | |
0bd3c5a7 EP |
624 | int scale_index, int attempts, int successes, |
625 | struct iwl_rate_scale_data *window) | |
8ca151b5 | 626 | { |
8ca151b5 JB |
627 | static const u64 mask = (((u64)1) << (IWL_RATE_MAX_WINDOW - 1)); |
628 | s32 fail_count, tpt; | |
629 | ||
8ca151b5 JB |
630 | /* Get expected throughput */ |
631 | tpt = get_expected_tpt(tbl, scale_index); | |
632 | ||
633 | /* | |
634 | * Keep track of only the latest 62 tx frame attempts in this rate's | |
635 | * history window; anything older isn't really relevant any more. | |
636 | * If we have filled up the sliding window, drop the oldest attempt; | |
637 | * if the oldest attempt (highest bit in bitmap) shows "success", | |
638 | * subtract "1" from the success counter (this is the main reason | |
639 | * we keep these bitmaps!). | |
640 | */ | |
641 | while (attempts > 0) { | |
642 | if (window->counter >= IWL_RATE_MAX_WINDOW) { | |
643 | /* remove earliest */ | |
644 | window->counter = IWL_RATE_MAX_WINDOW - 1; | |
645 | ||
646 | if (window->data & mask) { | |
647 | window->data &= ~mask; | |
648 | window->success_counter--; | |
649 | } | |
650 | } | |
651 | ||
652 | /* Increment frames-attempted counter */ | |
653 | window->counter++; | |
654 | ||
655 | /* Shift bitmap by one frame to throw away oldest history */ | |
656 | window->data <<= 1; | |
657 | ||
658 | /* Mark the most recent #successes attempts as successful */ | |
659 | if (successes > 0) { | |
660 | window->success_counter++; | |
661 | window->data |= 0x1; | |
662 | successes--; | |
663 | } | |
664 | ||
665 | attempts--; | |
666 | } | |
667 | ||
668 | /* Calculate current success ratio, avoid divide-by-0! */ | |
669 | if (window->counter > 0) | |
670 | window->success_ratio = 128 * (100 * window->success_counter) | |
671 | / window->counter; | |
672 | else | |
673 | window->success_ratio = IWL_INVALID_VALUE; | |
674 | ||
675 | fail_count = window->counter - window->success_counter; | |
676 | ||
677 | /* Calculate average throughput, if we have enough history. */ | |
834437da ES |
678 | if ((fail_count >= IWL_MVM_RS_RATE_MIN_FAILURE_TH) || |
679 | (window->success_counter >= IWL_MVM_RS_RATE_MIN_SUCCESS_TH)) | |
8ca151b5 JB |
680 | window->average_tpt = (window->success_ratio * tpt + 64) / 128; |
681 | else | |
682 | window->average_tpt = IWL_INVALID_VALUE; | |
683 | ||
8ca151b5 JB |
684 | return 0; |
685 | } | |
686 | ||
834437da ES |
687 | static int rs_collect_tx_data(struct iwl_mvm *mvm, |
688 | struct iwl_lq_sta *lq_sta, | |
757cf23b | 689 | struct iwl_scale_tbl_info *tbl, |
2fd647f8 EP |
690 | int scale_index, int attempts, int successes, |
691 | u8 reduced_txp) | |
0bd3c5a7 EP |
692 | { |
693 | struct iwl_rate_scale_data *window = NULL; | |
2fd647f8 | 694 | int ret; |
0bd3c5a7 EP |
695 | |
696 | if (scale_index < 0 || scale_index >= IWL_RATE_COUNT) | |
697 | return -EINVAL; | |
698 | ||
757cf23b | 699 | if (tbl->column != RS_COLUMN_INVALID) { |
f58220f6 ES |
700 | struct lq_sta_pers *pers = &lq_sta->pers; |
701 | ||
702 | pers->tx_stats[tbl->column][scale_index].total += attempts; | |
703 | pers->tx_stats[tbl->column][scale_index].success += successes; | |
757cf23b ES |
704 | } |
705 | ||
0bd3c5a7 EP |
706 | /* Select window for current tx bit rate */ |
707 | window = &(tbl->win[scale_index]); | |
708 | ||
834437da | 709 | ret = _rs_collect_tx_data(mvm, tbl, scale_index, attempts, successes, |
2fd647f8 EP |
710 | window); |
711 | if (ret) | |
712 | return ret; | |
713 | ||
714 | if (WARN_ON_ONCE(reduced_txp > TPC_MAX_REDUCTION)) | |
715 | return -EINVAL; | |
716 | ||
717 | window = &tbl->tpc_win[reduced_txp]; | |
834437da | 718 | return _rs_collect_tx_data(mvm, tbl, scale_index, attempts, successes, |
0bd3c5a7 EP |
719 | window); |
720 | } | |
721 | ||
5aa33553 ES |
722 | /* Convert rs_rate object into ucode rate bitmask */ |
723 | static u32 ucode_rate_from_rs_rate(struct iwl_mvm *mvm, | |
8fc7c58c | 724 | struct rs_rate *rate) |
8ca151b5 | 725 | { |
5aa33553 ES |
726 | u32 ucode_rate = 0; |
727 | int index = rate->index; | |
8ca151b5 | 728 | |
5aa33553 | 729 | ucode_rate |= ((rate->ant << RATE_MCS_ANT_POS) & |
d310e405 ES |
730 | RATE_MCS_ANT_ABC_MSK); |
731 | ||
5aa33553 ES |
732 | if (is_legacy(rate)) { |
733 | ucode_rate |= iwl_rates[index].plcp; | |
8ca151b5 | 734 | if (index >= IWL_FIRST_CCK_RATE && index <= IWL_LAST_CCK_RATE) |
5aa33553 ES |
735 | ucode_rate |= RATE_MCS_CCK_MSK; |
736 | return ucode_rate; | |
d310e405 ES |
737 | } |
738 | ||
5aa33553 | 739 | if (is_ht(rate)) { |
d310e405 | 740 | if (index < IWL_FIRST_HT_RATE || index > IWL_LAST_HT_RATE) { |
8ca151b5 | 741 | IWL_ERR(mvm, "Invalid HT rate index %d\n", index); |
4e82dd3a | 742 | index = IWL_LAST_HT_RATE; |
8ca151b5 | 743 | } |
5aa33553 | 744 | ucode_rate |= RATE_MCS_HT_MSK; |
8ca151b5 | 745 | |
5aa33553 ES |
746 | if (is_ht_siso(rate)) |
747 | ucode_rate |= iwl_rates[index].plcp_ht_siso; | |
748 | else if (is_ht_mimo2(rate)) | |
749 | ucode_rate |= iwl_rates[index].plcp_ht_mimo2; | |
8ca151b5 | 750 | else |
d972ab31 | 751 | WARN_ON_ONCE(1); |
5aa33553 | 752 | } else if (is_vht(rate)) { |
d310e405 ES |
753 | if (index < IWL_FIRST_VHT_RATE || index > IWL_LAST_VHT_RATE) { |
754 | IWL_ERR(mvm, "Invalid VHT rate index %d\n", index); | |
755 | index = IWL_LAST_VHT_RATE; | |
756 | } | |
5aa33553 ES |
757 | ucode_rate |= RATE_MCS_VHT_MSK; |
758 | if (is_vht_siso(rate)) | |
759 | ucode_rate |= iwl_rates[index].plcp_vht_siso; | |
760 | else if (is_vht_mimo2(rate)) | |
761 | ucode_rate |= iwl_rates[index].plcp_vht_mimo2; | |
d310e405 ES |
762 | else |
763 | WARN_ON_ONCE(1); | |
764 | ||
8ca151b5 | 765 | } else { |
5aa33553 | 766 | IWL_ERR(mvm, "Invalid rate->type %d\n", rate->type); |
8ca151b5 JB |
767 | } |
768 | ||
d8bafeaf ES |
769 | if (is_siso(rate) && rate->stbc) { |
770 | /* To enable STBC we need to set both a flag and ANT_AB */ | |
771 | ucode_rate |= RATE_MCS_ANT_AB_MSK; | |
772 | ucode_rate |= RATE_MCS_VHT_STBC_MSK; | |
773 | } | |
774 | ||
5aa33553 ES |
775 | ucode_rate |= rate->bw; |
776 | if (rate->sgi) | |
777 | ucode_rate |= RATE_MCS_SGI_MSK; | |
a3576ff2 ES |
778 | if (rate->ldpc) |
779 | ucode_rate |= RATE_MCS_LDPC_MSK; | |
d310e405 | 780 | |
5aa33553 | 781 | return ucode_rate; |
8ca151b5 JB |
782 | } |
783 | ||
5aa33553 ES |
784 | /* Convert a ucode rate into an rs_rate object */ |
785 | static int rs_rate_from_ucode_rate(const u32 ucode_rate, | |
786 | enum ieee80211_band band, | |
787 | struct rs_rate *rate) | |
8ca151b5 | 788 | { |
5aa33553 ES |
789 | u32 ant_msk = ucode_rate & RATE_MCS_ANT_ABC_MSK; |
790 | u8 num_of_ant = get_num_of_ant_from_rate(ucode_rate); | |
d310e405 | 791 | u8 nss; |
8ca151b5 | 792 | |
9e898f1b | 793 | memset(rate, 0, sizeof(*rate)); |
5aa33553 | 794 | rate->index = iwl_hwrate_to_plcp_idx(ucode_rate); |
8ca151b5 | 795 | |
560843f4 | 796 | if (rate->index == IWL_RATE_INVALID) |
8ca151b5 | 797 | return -EINVAL; |
5aa33553 ES |
798 | |
799 | rate->ant = (ant_msk >> RATE_MCS_ANT_POS); | |
8ca151b5 | 800 | |
d310e405 | 801 | /* Legacy */ |
5aa33553 ES |
802 | if (!(ucode_rate & RATE_MCS_HT_MSK) && |
803 | !(ucode_rate & RATE_MCS_VHT_MSK)) { | |
8ca151b5 JB |
804 | if (num_of_ant == 1) { |
805 | if (band == IEEE80211_BAND_5GHZ) | |
5aa33553 | 806 | rate->type = LQ_LEGACY_A; |
8ca151b5 | 807 | else |
5aa33553 | 808 | rate->type = LQ_LEGACY_G; |
8ca151b5 | 809 | } |
d310e405 ES |
810 | |
811 | return 0; | |
812 | } | |
813 | ||
814 | /* HT or VHT */ | |
5aa33553 ES |
815 | if (ucode_rate & RATE_MCS_SGI_MSK) |
816 | rate->sgi = true; | |
a3576ff2 ES |
817 | if (ucode_rate & RATE_MCS_LDPC_MSK) |
818 | rate->ldpc = true; | |
d8bafeaf ES |
819 | if (ucode_rate & RATE_MCS_VHT_STBC_MSK) |
820 | rate->stbc = true; | |
ba69d0e3 ES |
821 | if (ucode_rate & RATE_MCS_BF_MSK) |
822 | rate->bfer = true; | |
d310e405 | 823 | |
5aa33553 | 824 | rate->bw = ucode_rate & RATE_MCS_CHAN_WIDTH_MSK; |
d310e405 | 825 | |
5aa33553 ES |
826 | if (ucode_rate & RATE_MCS_HT_MSK) { |
827 | nss = ((ucode_rate & RATE_HT_MCS_NSS_MSK) >> | |
d310e405 ES |
828 | RATE_HT_MCS_NSS_POS) + 1; |
829 | ||
830 | if (nss == 1) { | |
5aa33553 | 831 | rate->type = LQ_HT_SISO; |
ba69d0e3 ES |
832 | WARN_ONCE(!rate->stbc && !rate->bfer && num_of_ant != 1, |
833 | "stbc %d bfer %d", | |
834 | rate->stbc, rate->bfer); | |
d310e405 | 835 | } else if (nss == 2) { |
5aa33553 | 836 | rate->type = LQ_HT_MIMO2; |
d310e405 | 837 | WARN_ON_ONCE(num_of_ant != 2); |
8ca151b5 | 838 | } else { |
d310e405 ES |
839 | WARN_ON_ONCE(1); |
840 | } | |
5aa33553 ES |
841 | } else if (ucode_rate & RATE_MCS_VHT_MSK) { |
842 | nss = ((ucode_rate & RATE_VHT_MCS_NSS_MSK) >> | |
d310e405 ES |
843 | RATE_VHT_MCS_NSS_POS) + 1; |
844 | ||
845 | if (nss == 1) { | |
5aa33553 | 846 | rate->type = LQ_VHT_SISO; |
ba69d0e3 ES |
847 | WARN_ONCE(!rate->stbc && !rate->bfer && num_of_ant != 1, |
848 | "stbc %d bfer %d", | |
849 | rate->stbc, rate->bfer); | |
d310e405 | 850 | } else if (nss == 2) { |
5aa33553 | 851 | rate->type = LQ_VHT_MIMO2; |
d310e405 ES |
852 | WARN_ON_ONCE(num_of_ant != 2); |
853 | } else { | |
854 | WARN_ON_ONCE(1); | |
8ca151b5 JB |
855 | } |
856 | } | |
d310e405 | 857 | |
5aa33553 ES |
858 | WARN_ON_ONCE(rate->bw == RATE_MCS_CHAN_WIDTH_160); |
859 | WARN_ON_ONCE(rate->bw == RATE_MCS_CHAN_WIDTH_80 && | |
860 | !is_vht(rate)); | |
d310e405 | 861 | |
8ca151b5 JB |
862 | return 0; |
863 | } | |
864 | ||
865 | /* switch to another antenna/antennas and return 1 */ | |
866 | /* if no other valid antenna found, return 0 */ | |
8fc7c58c | 867 | static int rs_toggle_antenna(u32 valid_ant, struct rs_rate *rate) |
8ca151b5 JB |
868 | { |
869 | u8 new_ant_type; | |
870 | ||
5aa33553 | 871 | if (!rate->ant || rate->ant > ANT_ABC) |
8ca151b5 JB |
872 | return 0; |
873 | ||
5aa33553 | 874 | if (!rs_is_valid_ant(valid_ant, rate->ant)) |
8ca151b5 JB |
875 | return 0; |
876 | ||
5aa33553 | 877 | new_ant_type = ant_toggle_lookup[rate->ant]; |
8ca151b5 | 878 | |
5aa33553 | 879 | while ((new_ant_type != rate->ant) && |
8ca151b5 JB |
880 | !rs_is_valid_ant(valid_ant, new_ant_type)) |
881 | new_ant_type = ant_toggle_lookup[new_ant_type]; | |
882 | ||
5aa33553 | 883 | if (new_ant_type == rate->ant) |
8ca151b5 JB |
884 | return 0; |
885 | ||
5aa33553 ES |
886 | rate->ant = new_ant_type; |
887 | ||
8ca151b5 JB |
888 | return 1; |
889 | } | |
890 | ||
8ca151b5 | 891 | static u16 rs_get_supported_rates(struct iwl_lq_sta *lq_sta, |
5aa33553 | 892 | struct rs_rate *rate) |
8ca151b5 | 893 | { |
5aa33553 | 894 | if (is_legacy(rate)) |
8ca151b5 | 895 | return lq_sta->active_legacy_rate; |
5aa33553 | 896 | else if (is_siso(rate)) |
d310e405 | 897 | return lq_sta->active_siso_rate; |
5aa33553 | 898 | else if (is_mimo2(rate)) |
d310e405 ES |
899 | return lq_sta->active_mimo2_rate; |
900 | ||
901 | WARN_ON_ONCE(1); | |
902 | return 0; | |
8ca151b5 JB |
903 | } |
904 | ||
905 | static u16 rs_get_adjacent_rate(struct iwl_mvm *mvm, u8 index, u16 rate_mask, | |
906 | int rate_type) | |
907 | { | |
908 | u8 high = IWL_RATE_INVALID; | |
909 | u8 low = IWL_RATE_INVALID; | |
910 | ||
911 | /* 802.11A or ht walks to the next literal adjacent rate in | |
912 | * the rate table */ | |
5aa33553 | 913 | if (is_type_a_band(rate_type) || !is_type_legacy(rate_type)) { |
8ca151b5 JB |
914 | int i; |
915 | u32 mask; | |
916 | ||
917 | /* Find the previous rate that is in the rate mask */ | |
918 | i = index - 1; | |
919 | for (mask = (1 << i); i >= 0; i--, mask >>= 1) { | |
920 | if (rate_mask & mask) { | |
921 | low = i; | |
922 | break; | |
923 | } | |
924 | } | |
925 | ||
926 | /* Find the next rate that is in the rate mask */ | |
927 | i = index + 1; | |
928 | for (mask = (1 << i); i < IWL_RATE_COUNT; i++, mask <<= 1) { | |
929 | if (rate_mask & mask) { | |
930 | high = i; | |
931 | break; | |
932 | } | |
933 | } | |
934 | ||
935 | return (high << 8) | low; | |
936 | } | |
937 | ||
938 | low = index; | |
939 | while (low != IWL_RATE_INVALID) { | |
940 | low = iwl_rates[low].prev_rs; | |
941 | if (low == IWL_RATE_INVALID) | |
942 | break; | |
943 | if (rate_mask & (1 << low)) | |
944 | break; | |
8ca151b5 JB |
945 | } |
946 | ||
947 | high = index; | |
948 | while (high != IWL_RATE_INVALID) { | |
949 | high = iwl_rates[high].next_rs; | |
950 | if (high == IWL_RATE_INVALID) | |
951 | break; | |
952 | if (rate_mask & (1 << high)) | |
953 | break; | |
8ca151b5 JB |
954 | } |
955 | ||
956 | return (high << 8) | low; | |
957 | } | |
958 | ||
e07be6d3 ES |
959 | static inline bool rs_rate_supported(struct iwl_lq_sta *lq_sta, |
960 | struct rs_rate *rate) | |
8ca151b5 | 961 | { |
e07be6d3 ES |
962 | return BIT(rate->index) & rs_get_supported_rates(lq_sta, rate); |
963 | } | |
964 | ||
965 | /* Get the next supported lower rate in the current column. | |
966 | * Return true if bottom rate in the current column was reached | |
967 | */ | |
968 | static bool rs_get_lower_rate_in_column(struct iwl_lq_sta *lq_sta, | |
969 | struct rs_rate *rate) | |
970 | { | |
971 | u8 low; | |
8ca151b5 | 972 | u16 high_low; |
e07be6d3 | 973 | u16 rate_mask; |
ae969afe | 974 | struct iwl_mvm *mvm = lq_sta->pers.drv; |
e07be6d3 ES |
975 | |
976 | rate_mask = rs_get_supported_rates(lq_sta, rate); | |
977 | high_low = rs_get_adjacent_rate(mvm, rate->index, rate_mask, | |
978 | rate->type); | |
979 | low = high_low & 0xff; | |
980 | ||
981 | /* Bottom rate of column reached */ | |
982 | if (low == IWL_RATE_INVALID) | |
983 | return true; | |
984 | ||
985 | rate->index = low; | |
986 | return false; | |
987 | } | |
988 | ||
989 | /* Get the next rate to use following a column downgrade */ | |
990 | static void rs_get_lower_rate_down_column(struct iwl_lq_sta *lq_sta, | |
991 | struct rs_rate *rate) | |
992 | { | |
ae969afe | 993 | struct iwl_mvm *mvm = lq_sta->pers.drv; |
8ca151b5 | 994 | |
e07be6d3 ES |
995 | if (is_legacy(rate)) { |
996 | /* No column to downgrade from Legacy */ | |
997 | return; | |
998 | } else if (is_siso(rate)) { | |
999 | /* Downgrade to Legacy if we were in SISO */ | |
8ca151b5 | 1000 | if (lq_sta->band == IEEE80211_BAND_5GHZ) |
5aa33553 | 1001 | rate->type = LQ_LEGACY_A; |
8ca151b5 | 1002 | else |
5aa33553 | 1003 | rate->type = LQ_LEGACY_G; |
8ca151b5 | 1004 | |
a56db7d1 | 1005 | rate->bw = RATE_MCS_CHAN_WIDTH_20; |
8ca151b5 | 1006 | |
b800040d | 1007 | WARN_ON_ONCE(rate->index < IWL_RATE_MCS_0_INDEX || |
e07be6d3 | 1008 | rate->index > IWL_RATE_MCS_9_INDEX); |
8ca151b5 | 1009 | |
e07be6d3 | 1010 | rate->index = rs_ht_to_legacy[rate->index]; |
a3576ff2 | 1011 | rate->ldpc = false; |
e07be6d3 ES |
1012 | } else { |
1013 | /* Downgrade to SISO with same MCS if in MIMO */ | |
1014 | rate->type = is_vht_mimo2(rate) ? | |
1015 | LQ_VHT_SISO : LQ_HT_SISO; | |
8ca151b5 JB |
1016 | } |
1017 | ||
e07be6d3 | 1018 | if (num_of_ant(rate->ant) > 1) |
a0544272 | 1019 | rate->ant = first_antenna(iwl_mvm_get_valid_tx_ant(mvm)); |
8ca151b5 | 1020 | |
e07be6d3 ES |
1021 | /* Relevant in both switching to SISO or Legacy */ |
1022 | rate->sgi = false; | |
1023 | ||
1024 | if (!rs_rate_supported(lq_sta, rate)) | |
1025 | rs_get_lower_rate_in_column(lq_sta, rate); | |
8ca151b5 JB |
1026 | } |
1027 | ||
ba69d0e3 ES |
1028 | /* Check if both rates are identical |
1029 | * allow_ant_mismatch enables matching a SISO rate on ANT_A or ANT_B | |
1030 | * with a rate indicating STBC/BFER and ANT_AB. | |
1031 | */ | |
929e6ede | 1032 | static inline bool rs_rate_equal(struct rs_rate *a, |
ba69d0e3 ES |
1033 | struct rs_rate *b, |
1034 | bool allow_ant_mismatch) | |
1035 | ||
929e6ede | 1036 | { |
ba69d0e3 ES |
1037 | bool ant_match = (a->ant == b->ant) && (a->stbc == b->stbc) && |
1038 | (a->bfer == b->bfer); | |
1039 | ||
1040 | if (allow_ant_mismatch) { | |
1041 | if (a->stbc || a->bfer) { | |
1042 | WARN_ONCE(a->ant != ANT_AB, "stbc %d bfer %d ant %d", | |
1043 | a->stbc, a->bfer, a->ant); | |
1044 | ant_match |= (b->ant == ANT_A || b->ant == ANT_B); | |
1045 | } else if (b->stbc || b->bfer) { | |
1046 | WARN_ONCE(b->ant != ANT_AB, "stbc %d bfer %d ant %d", | |
1047 | b->stbc, b->bfer, b->ant); | |
1048 | ant_match |= (a->ant == ANT_A || a->ant == ANT_B); | |
1049 | } | |
1050 | } | |
1051 | ||
929e6ede | 1052 | return (a->type == b->type) && (a->bw == b->bw) && (a->sgi == b->sgi) && |
ba69d0e3 | 1053 | (a->ldpc == b->ldpc) && (a->index == b->index) && ant_match; |
929e6ede ES |
1054 | } |
1055 | ||
1056 | /* Check if both rates share the same column */ | |
1057 | static inline bool rs_rate_column_match(struct rs_rate *a, | |
1058 | struct rs_rate *b) | |
8ca151b5 | 1059 | { |
d8bafeaf ES |
1060 | bool ant_match; |
1061 | ||
ba69d0e3 | 1062 | if (a->stbc || a->bfer) |
d8bafeaf ES |
1063 | ant_match = (b->ant == ANT_A || b->ant == ANT_B); |
1064 | else | |
1065 | ant_match = (a->ant == b->ant); | |
1066 | ||
1067 | return (a->type == b->type) && (a->bw == b->bw) && (a->sgi == b->sgi) | |
1068 | && ant_match; | |
8ca151b5 JB |
1069 | } |
1070 | ||
ad82d8a5 ES |
1071 | static inline enum rs_column rs_get_column_from_rate(struct rs_rate *rate) |
1072 | { | |
1073 | if (is_legacy(rate)) { | |
1074 | if (rate->ant == ANT_A) | |
1075 | return RS_COLUMN_LEGACY_ANT_A; | |
1076 | ||
1077 | if (rate->ant == ANT_B) | |
1078 | return RS_COLUMN_LEGACY_ANT_B; | |
1079 | ||
1080 | goto err; | |
1081 | } | |
1082 | ||
1083 | if (is_siso(rate)) { | |
1084 | if (rate->ant == ANT_A || rate->stbc || rate->bfer) | |
1085 | return rate->sgi ? RS_COLUMN_SISO_ANT_A_SGI : | |
1086 | RS_COLUMN_SISO_ANT_A; | |
1087 | ||
1088 | if (rate->ant == ANT_B) | |
1089 | return rate->sgi ? RS_COLUMN_SISO_ANT_B_SGI : | |
1090 | RS_COLUMN_SISO_ANT_B; | |
1091 | ||
1092 | goto err; | |
1093 | } | |
1094 | ||
1095 | if (is_mimo(rate)) | |
1096 | return rate->sgi ? RS_COLUMN_MIMO2_SGI : RS_COLUMN_MIMO2; | |
1097 | ||
1098 | err: | |
1099 | return RS_COLUMN_INVALID; | |
1100 | } | |
1101 | ||
1ebc8f2e ES |
1102 | static u8 rs_get_tid(struct ieee80211_hdr *hdr) |
1103 | { | |
1104 | u8 tid = IWL_MAX_TID_COUNT; | |
1105 | ||
1106 | if (ieee80211_is_data_qos(hdr->frame_control)) { | |
1107 | u8 *qc = ieee80211_get_qos_ctl(hdr); | |
1108 | tid = qc[0] & 0xf; | |
1109 | } | |
1110 | ||
1111 | if (unlikely(tid > IWL_MAX_TID_COUNT)) | |
1112 | tid = IWL_MAX_TID_COUNT; | |
1113 | ||
1114 | return tid; | |
1115 | } | |
1116 | ||
1117 | void iwl_mvm_rs_tx_status(struct iwl_mvm *mvm, struct ieee80211_sta *sta, | |
1118 | int tid, struct ieee80211_tx_info *info) | |
8ca151b5 JB |
1119 | { |
1120 | int legacy_success; | |
1121 | int retries; | |
929e6ede | 1122 | int i; |
8ca151b5 | 1123 | struct iwl_lq_cmd *table; |
929e6ede ES |
1124 | u32 lq_hwrate; |
1125 | struct rs_rate lq_rate, tx_resp_rate; | |
8ca151b5 | 1126 | struct iwl_scale_tbl_info *curr_tbl, *other_tbl, *tmp_tbl; |
2fd647f8 | 1127 | u8 reduced_txp = (uintptr_t)info->status.status_driver_data[0]; |
929e6ede | 1128 | u32 tx_resp_hwrate = (uintptr_t)info->status.status_driver_data[1]; |
1ebc8f2e ES |
1129 | struct iwl_mvm_sta *mvmsta = iwl_mvm_sta_from_mac80211(sta); |
1130 | struct iwl_lq_sta *lq_sta = &mvmsta->lq_sta; | |
859d914c JB |
1131 | bool allow_ant_mismatch = fw_has_api(&mvm->fw->ucode_capa, |
1132 | IWL_UCODE_TLV_API_LQ_SS_PARAMS); | |
8ca151b5 | 1133 | |
8ca151b5 JB |
1134 | /* Treat uninitialized rate scaling data same as non-existing. */ |
1135 | if (!lq_sta) { | |
1136 | IWL_DEBUG_RATE(mvm, "Station rate scaling not created yet.\n"); | |
1137 | return; | |
ae969afe | 1138 | } else if (!lq_sta->pers.drv) { |
8ca151b5 JB |
1139 | IWL_DEBUG_RATE(mvm, "Rate scaling not initialized yet.\n"); |
1140 | return; | |
1141 | } | |
1142 | ||
ad82d8a5 ES |
1143 | /* This packet was aggregated but doesn't carry status info */ |
1144 | if ((info->flags & IEEE80211_TX_CTL_AMPDU) && | |
1145 | !(info->flags & IEEE80211_TX_STAT_AMPDU)) | |
1146 | return; | |
1147 | ||
1148 | rs_rate_from_ucode_rate(tx_resp_hwrate, info->band, &tx_resp_rate); | |
1149 | ||
8e96440e | 1150 | #ifdef CONFIG_MAC80211_DEBUGFS |
ad82d8a5 ES |
1151 | /* Disable last tx check if we are debugging with fixed rate but |
1152 | * update tx stats */ | |
ae969afe | 1153 | if (lq_sta->pers.dbg_fixed_rate) { |
ad82d8a5 ES |
1154 | int index = tx_resp_rate.index; |
1155 | enum rs_column column; | |
1156 | int attempts, success; | |
1157 | ||
1158 | column = rs_get_column_from_rate(&tx_resp_rate); | |
1159 | if (WARN_ONCE(column == RS_COLUMN_INVALID, | |
1160 | "Can't map rate 0x%x to column", | |
1161 | tx_resp_hwrate)) | |
1162 | return; | |
1163 | ||
1164 | if (info->flags & IEEE80211_TX_STAT_AMPDU) { | |
1165 | attempts = info->status.ampdu_len; | |
1166 | success = info->status.ampdu_ack_len; | |
1167 | } else { | |
1168 | attempts = info->status.rates[0].count; | |
1169 | success = !!(info->flags & IEEE80211_TX_STAT_ACK); | |
1170 | } | |
1171 | ||
1172 | lq_sta->pers.tx_stats[column][index].total += attempts; | |
1173 | lq_sta->pers.tx_stats[column][index].success += success; | |
1174 | ||
1175 | IWL_DEBUG_RATE(mvm, "Fixed rate 0x%x success %d attempts %d\n", | |
1176 | tx_resp_hwrate, success, attempts); | |
87d5e415 ES |
1177 | return; |
1178 | } | |
1179 | #endif | |
8ca151b5 | 1180 | |
87d5e415 | 1181 | if (time_after(jiffies, |
834437da ES |
1182 | (unsigned long)(lq_sta->last_tx + |
1183 | (IWL_MVM_RS_IDLE_TIMEOUT * HZ)))) { | |
efad21d2 JB |
1184 | int t; |
1185 | ||
87d5e415 | 1186 | IWL_DEBUG_RATE(mvm, "Tx idle for too long. reinit rs\n"); |
efad21d2 JB |
1187 | for (t = 0; t < IWL_MAX_TID_COUNT; t++) |
1188 | ieee80211_stop_tx_ba_session(sta, t); | |
87d5e415 | 1189 | |
1ebc8f2e | 1190 | iwl_mvm_rs_rate_init(mvm, sta, info->band, false); |
87d5e415 ES |
1191 | return; |
1192 | } | |
1193 | lq_sta->last_tx = jiffies; | |
1194 | ||
929e6ede ES |
1195 | /* Ignore this Tx frame response if its initial rate doesn't match |
1196 | * that of latest Link Quality command. There may be stragglers | |
1197 | * from a previous Link Quality command, but we're no longer interested | |
1198 | * in those; they're either from the "active" mode while we're trying | |
1199 | * to check "search" mode, or a prior "search" mode after we've moved | |
1200 | * to a new "search" mode (which might become the new "active" mode). | |
1201 | */ | |
1202 | table = &lq_sta->lq; | |
1203 | lq_hwrate = le32_to_cpu(table->rs_table[0]); | |
1204 | rs_rate_from_ucode_rate(lq_hwrate, info->band, &lq_rate); | |
929e6ede | 1205 | |
8ca151b5 | 1206 | /* Here we actually compare this rate to the latest LQ command */ |
ba69d0e3 | 1207 | if (!rs_rate_equal(&tx_resp_rate, &lq_rate, allow_ant_mismatch)) { |
8ca151b5 | 1208 | IWL_DEBUG_RATE(mvm, |
929e6ede ES |
1209 | "initial tx resp rate 0x%x does not match 0x%x\n", |
1210 | tx_resp_hwrate, lq_hwrate); | |
1211 | ||
8ca151b5 JB |
1212 | /* |
1213 | * Since rates mis-match, the last LQ command may have failed. | |
1214 | * After IWL_MISSED_RATE_MAX mis-matches, resync the uCode with | |
1215 | * ... driver. | |
1216 | */ | |
1217 | lq_sta->missed_rate_counter++; | |
834437da | 1218 | if (lq_sta->missed_rate_counter > IWL_MVM_RS_MISSED_RATE_MAX) { |
8ca151b5 | 1219 | lq_sta->missed_rate_counter = 0; |
b3b06a32 ES |
1220 | IWL_DEBUG_RATE(mvm, |
1221 | "Too many rates mismatch. Send sync LQ. rs_state %d\n", | |
1222 | lq_sta->rs_state); | |
9e680946 | 1223 | iwl_mvm_send_lq_cmd(mvm, &lq_sta->lq, false); |
8ca151b5 JB |
1224 | } |
1225 | /* Regardless, ignore this status info for outdated rate */ | |
1226 | return; | |
1227 | } else | |
1228 | /* Rate did match, so reset the missed_rate_counter */ | |
1229 | lq_sta->missed_rate_counter = 0; | |
1230 | ||
26a2cc01 | 1231 | if (!lq_sta->search_better_tbl) { |
8ca151b5 JB |
1232 | curr_tbl = &(lq_sta->lq_info[lq_sta->active_tbl]); |
1233 | other_tbl = &(lq_sta->lq_info[1 - lq_sta->active_tbl]); | |
26a2cc01 | 1234 | } else { |
8ca151b5 JB |
1235 | curr_tbl = &(lq_sta->lq_info[1 - lq_sta->active_tbl]); |
1236 | other_tbl = &(lq_sta->lq_info[lq_sta->active_tbl]); | |
26a2cc01 ES |
1237 | } |
1238 | ||
929e6ede | 1239 | if (WARN_ON_ONCE(!rs_rate_column_match(&lq_rate, &curr_tbl->rate))) { |
8ca151b5 JB |
1240 | IWL_DEBUG_RATE(mvm, |
1241 | "Neither active nor search matches tx rate\n"); | |
1242 | tmp_tbl = &(lq_sta->lq_info[lq_sta->active_tbl]); | |
5aa33553 | 1243 | rs_dump_rate(mvm, &tmp_tbl->rate, "ACTIVE"); |
8ca151b5 | 1244 | tmp_tbl = &(lq_sta->lq_info[1 - lq_sta->active_tbl]); |
5aa33553 | 1245 | rs_dump_rate(mvm, &tmp_tbl->rate, "SEARCH"); |
929e6ede | 1246 | rs_dump_rate(mvm, &lq_rate, "ACTUAL"); |
5aa33553 | 1247 | |
8ca151b5 JB |
1248 | /* |
1249 | * no matching table found, let's by-pass the data collection | |
1250 | * and continue to perform rate scale to find the rate table | |
1251 | */ | |
1252 | rs_stay_in_table(lq_sta, true); | |
1253 | goto done; | |
1254 | } | |
1255 | ||
1256 | /* | |
1257 | * Updating the frame history depends on whether packets were | |
1258 | * aggregated. | |
1259 | * | |
1260 | * For aggregation, all packets were transmitted at the same rate, the | |
1261 | * first index into rate scale table. | |
1262 | */ | |
1263 | if (info->flags & IEEE80211_TX_STAT_AMPDU) { | |
d6bda667 ES |
1264 | /* ampdu_ack_len = 0 marks no BA was received. In this case |
1265 | * treat it as a single frame loss as we don't want the success | |
1266 | * ratio to dip too quickly because a BA wasn't received | |
1267 | */ | |
1268 | if (info->status.ampdu_ack_len == 0) | |
1269 | info->status.ampdu_len = 1; | |
1270 | ||
929e6ede | 1271 | rs_collect_tx_data(mvm, lq_sta, curr_tbl, lq_rate.index, |
8ca151b5 | 1272 | info->status.ampdu_len, |
2fd647f8 EP |
1273 | info->status.ampdu_ack_len, |
1274 | reduced_txp); | |
8ca151b5 JB |
1275 | |
1276 | /* Update success/fail counts if not searching for new mode */ | |
b3b06a32 | 1277 | if (lq_sta->rs_state == RS_STATE_STAY_IN_COLUMN) { |
8ca151b5 JB |
1278 | lq_sta->total_success += info->status.ampdu_ack_len; |
1279 | lq_sta->total_failed += (info->status.ampdu_len - | |
1280 | info->status.ampdu_ack_len); | |
1281 | } | |
1282 | } else { | |
90cb1237 | 1283 | /* For legacy, update frame history with for each Tx retry. */ |
8ca151b5 JB |
1284 | retries = info->status.rates[0].count - 1; |
1285 | /* HW doesn't send more than 15 retries */ | |
1286 | retries = min(retries, 15); | |
1287 | ||
1288 | /* The last transmission may have been successful */ | |
1289 | legacy_success = !!(info->flags & IEEE80211_TX_STAT_ACK); | |
1290 | /* Collect data for each rate used during failed TX attempts */ | |
1291 | for (i = 0; i <= retries; ++i) { | |
929e6ede ES |
1292 | lq_hwrate = le32_to_cpu(table->rs_table[i]); |
1293 | rs_rate_from_ucode_rate(lq_hwrate, info->band, | |
1294 | &lq_rate); | |
8ca151b5 JB |
1295 | /* |
1296 | * Only collect stats if retried rate is in the same RS | |
1297 | * table as active/search. | |
1298 | */ | |
929e6ede | 1299 | if (rs_rate_column_match(&lq_rate, &curr_tbl->rate)) |
8ca151b5 | 1300 | tmp_tbl = curr_tbl; |
929e6ede ES |
1301 | else if (rs_rate_column_match(&lq_rate, |
1302 | &other_tbl->rate)) | |
8ca151b5 | 1303 | tmp_tbl = other_tbl; |
4107dbd2 | 1304 | else |
8ca151b5 | 1305 | continue; |
4107dbd2 | 1306 | |
929e6ede ES |
1307 | rs_collect_tx_data(mvm, lq_sta, tmp_tbl, lq_rate.index, |
1308 | 1, i < retries ? 0 : legacy_success, | |
2fd647f8 | 1309 | reduced_txp); |
8ca151b5 JB |
1310 | } |
1311 | ||
1312 | /* Update success/fail counts if not searching for new mode */ | |
b3b06a32 | 1313 | if (lq_sta->rs_state == RS_STATE_STAY_IN_COLUMN) { |
8ca151b5 JB |
1314 | lq_sta->total_success += legacy_success; |
1315 | lq_sta->total_failed += retries + (1 - legacy_success); | |
1316 | } | |
1317 | } | |
1318 | /* The last TX rate is cached in lq_sta; it's set in if/else above */ | |
929e6ede | 1319 | lq_sta->last_rate_n_flags = lq_hwrate; |
2fd647f8 | 1320 | IWL_DEBUG_RATE(mvm, "reduced txpower: %d\n", reduced_txp); |
8ca151b5 JB |
1321 | done: |
1322 | /* See if there's a better rate or modulation mode to try. */ | |
8dfc2751 | 1323 | if (sta->supp_rates[info->band]) |
1ebc8f2e ES |
1324 | rs_rate_scale_perform(mvm, sta, lq_sta, tid); |
1325 | } | |
1326 | ||
1327 | /* | |
1328 | * mac80211 sends us Tx status | |
1329 | */ | |
1330 | static void rs_mac80211_tx_status(void *mvm_r, | |
1331 | struct ieee80211_supported_band *sband, | |
1332 | struct ieee80211_sta *sta, void *priv_sta, | |
1333 | struct sk_buff *skb) | |
1334 | { | |
1335 | struct ieee80211_hdr *hdr = (struct ieee80211_hdr *)skb->data; | |
1336 | struct iwl_op_mode *op_mode = (struct iwl_op_mode *)mvm_r; | |
1337 | struct iwl_mvm *mvm = IWL_OP_MODE_GET_MVM(op_mode); | |
1338 | struct ieee80211_tx_info *info = IEEE80211_SKB_CB(skb); | |
1339 | ||
dcbc17ad JB |
1340 | if (!iwl_mvm_sta_from_mac80211(sta)->vif) |
1341 | return; | |
1342 | ||
1ebc8f2e ES |
1343 | if (!ieee80211_is_data(hdr->frame_control) || |
1344 | info->flags & IEEE80211_TX_CTL_NO_ACK) | |
1345 | return; | |
1346 | ||
1347 | iwl_mvm_rs_tx_status(mvm, sta, rs_get_tid(hdr), info); | |
8ca151b5 JB |
1348 | } |
1349 | ||
1350 | /* | |
1351 | * Begin a period of staying with a selected modulation mode. | |
1352 | * Set "stay_in_tbl" flag to prevent any mode switches. | |
1353 | * Set frame tx success limits according to legacy vs. high-throughput, | |
1354 | * and reset overall (spanning all rates) tx success history statistics. | |
1355 | * These control how long we stay using same modulation mode before | |
1356 | * searching for a new mode. | |
1357 | */ | |
1358 | static void rs_set_stay_in_table(struct iwl_mvm *mvm, u8 is_legacy, | |
1359 | struct iwl_lq_sta *lq_sta) | |
1360 | { | |
b3b06a32 ES |
1361 | IWL_DEBUG_RATE(mvm, "Moving to RS_STATE_STAY_IN_COLUMN\n"); |
1362 | lq_sta->rs_state = RS_STATE_STAY_IN_COLUMN; | |
8ca151b5 | 1363 | if (is_legacy) { |
834437da ES |
1364 | lq_sta->table_count_limit = IWL_MVM_RS_LEGACY_TABLE_COUNT; |
1365 | lq_sta->max_failure_limit = IWL_MVM_RS_LEGACY_FAILURE_LIMIT; | |
1366 | lq_sta->max_success_limit = IWL_MVM_RS_LEGACY_SUCCESS_LIMIT; | |
8ca151b5 | 1367 | } else { |
834437da ES |
1368 | lq_sta->table_count_limit = IWL_MVM_RS_NON_LEGACY_TABLE_COUNT; |
1369 | lq_sta->max_failure_limit = IWL_MVM_RS_NON_LEGACY_FAILURE_LIMIT; | |
1370 | lq_sta->max_success_limit = IWL_MVM_RS_NON_LEGACY_SUCCESS_LIMIT; | |
8ca151b5 JB |
1371 | } |
1372 | lq_sta->table_count = 0; | |
1373 | lq_sta->total_failed = 0; | |
1374 | lq_sta->total_success = 0; | |
1375 | lq_sta->flush_timer = jiffies; | |
b3b06a32 | 1376 | lq_sta->visited_columns = 0; |
8ca151b5 JB |
1377 | } |
1378 | ||
6a028d9a ES |
1379 | static inline int rs_get_max_rate_from_mask(unsigned long rate_mask) |
1380 | { | |
1381 | if (rate_mask) | |
1382 | return find_last_bit(&rate_mask, BITS_PER_LONG); | |
1383 | return IWL_RATE_INVALID; | |
1384 | } | |
1385 | ||
198266a3 ES |
1386 | static int rs_get_max_allowed_rate(struct iwl_lq_sta *lq_sta, |
1387 | const struct rs_tx_column *column) | |
1388 | { | |
1389 | switch (column->mode) { | |
1390 | case RS_LEGACY: | |
1391 | return lq_sta->max_legacy_rate_idx; | |
1392 | case RS_SISO: | |
1393 | return lq_sta->max_siso_rate_idx; | |
1394 | case RS_MIMO2: | |
1395 | return lq_sta->max_mimo2_rate_idx; | |
1396 | default: | |
1397 | WARN_ON_ONCE(1); | |
1398 | } | |
1399 | ||
1400 | return lq_sta->max_legacy_rate_idx; | |
1401 | } | |
1402 | ||
a34529e8 | 1403 | static const u16 *rs_get_expected_tpt_table(struct iwl_lq_sta *lq_sta, |
198266a3 ES |
1404 | const struct rs_tx_column *column, |
1405 | u32 bw) | |
8ca151b5 JB |
1406 | { |
1407 | /* Used to choose among HT tables */ | |
a34529e8 | 1408 | const u16 (*ht_tbl_pointer)[IWL_RATE_COUNT]; |
8ca151b5 | 1409 | |
b3b06a32 ES |
1410 | if (WARN_ON_ONCE(column->mode != RS_LEGACY && |
1411 | column->mode != RS_SISO && | |
1412 | column->mode != RS_MIMO2)) | |
1413 | return expected_tpt_legacy; | |
8ca151b5 JB |
1414 | |
1415 | /* Legacy rates have only one table */ | |
b3b06a32 ES |
1416 | if (column->mode == RS_LEGACY) |
1417 | return expected_tpt_legacy; | |
8ca151b5 | 1418 | |
d310e405 | 1419 | ht_tbl_pointer = expected_tpt_mimo2_20MHz; |
8ca151b5 | 1420 | /* Choose among many HT tables depending on number of streams |
d310e405 | 1421 | * (SISO/MIMO2), channel width (20/40/80), SGI, and aggregation |
8ca151b5 | 1422 | * status */ |
b3b06a32 ES |
1423 | if (column->mode == RS_SISO) { |
1424 | switch (bw) { | |
d310e405 ES |
1425 | case RATE_MCS_CHAN_WIDTH_20: |
1426 | ht_tbl_pointer = expected_tpt_siso_20MHz; | |
1427 | break; | |
1428 | case RATE_MCS_CHAN_WIDTH_40: | |
1429 | ht_tbl_pointer = expected_tpt_siso_40MHz; | |
1430 | break; | |
1431 | case RATE_MCS_CHAN_WIDTH_80: | |
1432 | ht_tbl_pointer = expected_tpt_siso_80MHz; | |
1433 | break; | |
1434 | default: | |
1435 | WARN_ON_ONCE(1); | |
1436 | } | |
b3b06a32 ES |
1437 | } else if (column->mode == RS_MIMO2) { |
1438 | switch (bw) { | |
d310e405 ES |
1439 | case RATE_MCS_CHAN_WIDTH_20: |
1440 | ht_tbl_pointer = expected_tpt_mimo2_20MHz; | |
1441 | break; | |
1442 | case RATE_MCS_CHAN_WIDTH_40: | |
1443 | ht_tbl_pointer = expected_tpt_mimo2_40MHz; | |
1444 | break; | |
1445 | case RATE_MCS_CHAN_WIDTH_80: | |
1446 | ht_tbl_pointer = expected_tpt_mimo2_80MHz; | |
1447 | break; | |
1448 | default: | |
1449 | WARN_ON_ONCE(1); | |
1450 | } | |
1451 | } else { | |
1452 | WARN_ON_ONCE(1); | |
d972ab31 | 1453 | } |
8ca151b5 | 1454 | |
b3b06a32 ES |
1455 | if (!column->sgi && !lq_sta->is_agg) /* Normal */ |
1456 | return ht_tbl_pointer[0]; | |
1457 | else if (column->sgi && !lq_sta->is_agg) /* SGI */ | |
1458 | return ht_tbl_pointer[1]; | |
1459 | else if (!column->sgi && lq_sta->is_agg) /* AGG */ | |
1460 | return ht_tbl_pointer[2]; | |
8ca151b5 | 1461 | else /* AGG+SGI */ |
b3b06a32 ES |
1462 | return ht_tbl_pointer[3]; |
1463 | } | |
1464 | ||
1465 | static void rs_set_expected_tpt_table(struct iwl_lq_sta *lq_sta, | |
1466 | struct iwl_scale_tbl_info *tbl) | |
1467 | { | |
1468 | struct rs_rate *rate = &tbl->rate; | |
1469 | const struct rs_tx_column *column = &rs_tx_columns[tbl->column]; | |
1470 | ||
1471 | tbl->expected_tpt = rs_get_expected_tpt_table(lq_sta, column, rate->bw); | |
8ca151b5 JB |
1472 | } |
1473 | ||
8ca151b5 JB |
1474 | static s32 rs_get_best_rate(struct iwl_mvm *mvm, |
1475 | struct iwl_lq_sta *lq_sta, | |
1476 | struct iwl_scale_tbl_info *tbl, /* "search" */ | |
80763515 | 1477 | unsigned long rate_mask, s8 index) |
8ca151b5 | 1478 | { |
8ca151b5 JB |
1479 | struct iwl_scale_tbl_info *active_tbl = |
1480 | &(lq_sta->lq_info[lq_sta->active_tbl]); | |
80763515 ES |
1481 | s32 success_ratio = active_tbl->win[index].success_ratio; |
1482 | u16 expected_current_tpt = active_tbl->expected_tpt[index]; | |
a34529e8 | 1483 | const u16 *tpt_tbl = tbl->expected_tpt; |
8ca151b5 | 1484 | u16 high_low; |
80763515 ES |
1485 | u32 target_tpt; |
1486 | int rate_idx; | |
8ca151b5 | 1487 | |
834437da | 1488 | if (success_ratio > IWL_MVM_RS_SR_NO_DECREASE) { |
80763515 ES |
1489 | target_tpt = 100 * expected_current_tpt; |
1490 | IWL_DEBUG_RATE(mvm, | |
1491 | "SR %d high. Find rate exceeding EXPECTED_CURRENT %d\n", | |
1492 | success_ratio, target_tpt); | |
1493 | } else { | |
1494 | target_tpt = lq_sta->last_tpt; | |
1495 | IWL_DEBUG_RATE(mvm, | |
1496 | "SR %d not thag good. Find rate exceeding ACTUAL_TPT %d\n", | |
1497 | success_ratio, target_tpt); | |
1498 | } | |
8ca151b5 | 1499 | |
80763515 | 1500 | rate_idx = find_first_bit(&rate_mask, BITS_PER_LONG); |
8ca151b5 | 1501 | |
80763515 ES |
1502 | while (rate_idx != IWL_RATE_INVALID) { |
1503 | if (target_tpt < (100 * tpt_tbl[rate_idx])) | |
1504 | break; | |
8ca151b5 | 1505 | |
80763515 ES |
1506 | high_low = rs_get_adjacent_rate(mvm, rate_idx, rate_mask, |
1507 | tbl->rate.type); | |
8ca151b5 | 1508 | |
80763515 | 1509 | rate_idx = (high_low >> 8) & 0xff; |
8ca151b5 JB |
1510 | } |
1511 | ||
80763515 ES |
1512 | IWL_DEBUG_RATE(mvm, "Best rate found %d target_tp %d expected_new %d\n", |
1513 | rate_idx, target_tpt, | |
1514 | rate_idx != IWL_RATE_INVALID ? | |
1515 | 100 * tpt_tbl[rate_idx] : IWL_INVALID_VALUE); | |
1516 | ||
1517 | return rate_idx; | |
8ca151b5 JB |
1518 | } |
1519 | ||
5aa33553 | 1520 | static u32 rs_bw_from_sta_bw(struct ieee80211_sta *sta) |
d310e405 ES |
1521 | { |
1522 | if (sta->bandwidth >= IEEE80211_STA_RX_BW_80) | |
5aa33553 | 1523 | return RATE_MCS_CHAN_WIDTH_80; |
d310e405 | 1524 | else if (sta->bandwidth >= IEEE80211_STA_RX_BW_40) |
5aa33553 ES |
1525 | return RATE_MCS_CHAN_WIDTH_40; |
1526 | ||
1527 | return RATE_MCS_CHAN_WIDTH_20; | |
d310e405 ES |
1528 | } |
1529 | ||
8ca151b5 JB |
1530 | /* |
1531 | * Check whether we should continue using same modulation mode, or | |
1532 | * begin search for a new mode, based on: | |
1533 | * 1) # tx successes or failures while using this mode | |
1534 | * 2) # times calling this function | |
1535 | * 3) elapsed time in this mode (not used, for now) | |
1536 | */ | |
1537 | static void rs_stay_in_table(struct iwl_lq_sta *lq_sta, bool force_search) | |
1538 | { | |
1539 | struct iwl_scale_tbl_info *tbl; | |
8ca151b5 JB |
1540 | int active_tbl; |
1541 | int flush_interval_passed = 0; | |
1542 | struct iwl_mvm *mvm; | |
1543 | ||
ae969afe | 1544 | mvm = lq_sta->pers.drv; |
8ca151b5 JB |
1545 | active_tbl = lq_sta->active_tbl; |
1546 | ||
1547 | tbl = &(lq_sta->lq_info[active_tbl]); | |
1548 | ||
1549 | /* If we've been disallowing search, see if we should now allow it */ | |
b3b06a32 | 1550 | if (lq_sta->rs_state == RS_STATE_STAY_IN_COLUMN) { |
8ca151b5 JB |
1551 | /* Elapsed time using current modulation mode */ |
1552 | if (lq_sta->flush_timer) | |
1553 | flush_interval_passed = | |
1554 | time_after(jiffies, | |
1555 | (unsigned long)(lq_sta->flush_timer + | |
834437da | 1556 | (IWL_MVM_RS_STAY_IN_COLUMN_TIMEOUT * HZ))); |
8ca151b5 JB |
1557 | |
1558 | /* | |
1559 | * Check if we should allow search for new modulation mode. | |
1560 | * If many frames have failed or succeeded, or we've used | |
1561 | * this same modulation for a long time, allow search, and | |
1562 | * reset history stats that keep track of whether we should | |
1563 | * allow a new search. Also (below) reset all bitmaps and | |
1564 | * stats in active history. | |
1565 | */ | |
1566 | if (force_search || | |
1567 | (lq_sta->total_failed > lq_sta->max_failure_limit) || | |
1568 | (lq_sta->total_success > lq_sta->max_success_limit) || | |
1569 | ((!lq_sta->search_better_tbl) && | |
1570 | (lq_sta->flush_timer) && (flush_interval_passed))) { | |
1571 | IWL_DEBUG_RATE(mvm, | |
1572 | "LQ: stay is expired %d %d %d\n", | |
1573 | lq_sta->total_failed, | |
1574 | lq_sta->total_success, | |
1575 | flush_interval_passed); | |
1576 | ||
1577 | /* Allow search for new mode */ | |
b3b06a32 ES |
1578 | lq_sta->rs_state = RS_STATE_SEARCH_CYCLE_STARTED; |
1579 | IWL_DEBUG_RATE(mvm, | |
1580 | "Moving to RS_STATE_SEARCH_CYCLE_STARTED\n"); | |
8ca151b5 JB |
1581 | lq_sta->total_failed = 0; |
1582 | lq_sta->total_success = 0; | |
1583 | lq_sta->flush_timer = 0; | |
b3b06a32 ES |
1584 | /* mark the current column as visited */ |
1585 | lq_sta->visited_columns = BIT(tbl->column); | |
8ca151b5 JB |
1586 | /* |
1587 | * Else if we've used this modulation mode enough repetitions | |
1588 | * (regardless of elapsed time or success/failure), reset | |
1589 | * history bitmaps and rate-specific stats for all rates in | |
1590 | * active table. | |
1591 | */ | |
1592 | } else { | |
1593 | lq_sta->table_count++; | |
1594 | if (lq_sta->table_count >= | |
1595 | lq_sta->table_count_limit) { | |
1596 | lq_sta->table_count = 0; | |
1597 | ||
1598 | IWL_DEBUG_RATE(mvm, | |
1599 | "LQ: stay in table clear win\n"); | |
b804eeb6 | 1600 | rs_rate_scale_clear_tbl_windows(mvm, tbl); |
8ca151b5 JB |
1601 | } |
1602 | } | |
1603 | ||
1604 | /* If transitioning to allow "search", reset all history | |
1605 | * bitmaps and stats in active table (this will become the new | |
1606 | * "search" table). */ | |
b3b06a32 | 1607 | if (lq_sta->rs_state == RS_STATE_SEARCH_CYCLE_STARTED) { |
b804eeb6 | 1608 | rs_rate_scale_clear_tbl_windows(mvm, tbl); |
8ca151b5 JB |
1609 | } |
1610 | } | |
1611 | } | |
1612 | ||
1613 | /* | |
1614 | * setup rate table in uCode | |
1615 | */ | |
1616 | static void rs_update_rate_tbl(struct iwl_mvm *mvm, | |
9145d151 | 1617 | struct ieee80211_sta *sta, |
8ca151b5 | 1618 | struct iwl_lq_sta *lq_sta, |
7b9d74e4 | 1619 | struct iwl_scale_tbl_info *tbl) |
8ca151b5 | 1620 | { |
7b9d74e4 | 1621 | rs_fill_lq_cmd(mvm, sta, lq_sta, &tbl->rate); |
9e680946 | 1622 | iwl_mvm_send_lq_cmd(mvm, &lq_sta->lq, false); |
8ca151b5 JB |
1623 | } |
1624 | ||
b3b06a32 ES |
1625 | static enum rs_column rs_get_next_column(struct iwl_mvm *mvm, |
1626 | struct iwl_lq_sta *lq_sta, | |
1627 | struct ieee80211_sta *sta, | |
1628 | struct iwl_scale_tbl_info *tbl) | |
1629 | { | |
198266a3 | 1630 | int i, j, max_rate; |
b3b06a32 ES |
1631 | enum rs_column next_col_id; |
1632 | const struct rs_tx_column *curr_col = &rs_tx_columns[tbl->column]; | |
1633 | const struct rs_tx_column *next_col; | |
1634 | allow_column_func_t allow_func; | |
a0544272 | 1635 | u8 valid_ants = iwl_mvm_get_valid_tx_ant(mvm); |
a34529e8 | 1636 | const u16 *expected_tpt_tbl; |
198266a3 | 1637 | u16 tpt, max_expected_tpt; |
b3b06a32 ES |
1638 | |
1639 | for (i = 0; i < MAX_NEXT_COLUMNS; i++) { | |
1640 | next_col_id = curr_col->next_columns[i]; | |
1641 | ||
1642 | if (next_col_id == RS_COLUMN_INVALID) | |
1643 | continue; | |
1644 | ||
1645 | if (lq_sta->visited_columns & BIT(next_col_id)) { | |
1646 | IWL_DEBUG_RATE(mvm, "Skip already visited column %d\n", | |
1647 | next_col_id); | |
1648 | continue; | |
1649 | } | |
1650 | ||
1651 | next_col = &rs_tx_columns[next_col_id]; | |
1652 | ||
1653 | if (!rs_is_valid_ant(valid_ants, next_col->ant)) { | |
1654 | IWL_DEBUG_RATE(mvm, | |
1655 | "Skip column %d as ANT config isn't supported by chip. valid_ants 0x%x column ant 0x%x\n", | |
1656 | next_col_id, valid_ants, next_col->ant); | |
1657 | continue; | |
1658 | } | |
1659 | ||
1660 | for (j = 0; j < MAX_COLUMN_CHECKS; j++) { | |
1661 | allow_func = next_col->checks[j]; | |
bb8f44c9 ES |
1662 | if (allow_func && !allow_func(mvm, sta, &tbl->rate, |
1663 | next_col)) | |
b3b06a32 ES |
1664 | break; |
1665 | } | |
1666 | ||
1667 | if (j != MAX_COLUMN_CHECKS) { | |
1668 | IWL_DEBUG_RATE(mvm, | |
1669 | "Skip column %d: not allowed (check %d failed)\n", | |
1670 | next_col_id, j); | |
1671 | ||
1672 | continue; | |
1673 | } | |
1674 | ||
1675 | tpt = lq_sta->last_tpt / 100; | |
1676 | expected_tpt_tbl = rs_get_expected_tpt_table(lq_sta, next_col, | |
049e0c33 | 1677 | rs_bw_from_sta_bw(sta)); |
b3b06a32 ES |
1678 | if (WARN_ON_ONCE(!expected_tpt_tbl)) |
1679 | continue; | |
1680 | ||
198266a3 | 1681 | max_rate = rs_get_max_allowed_rate(lq_sta, next_col); |
6a028d9a ES |
1682 | if (max_rate == IWL_RATE_INVALID) { |
1683 | IWL_DEBUG_RATE(mvm, | |
1684 | "Skip column %d: no rate is allowed in this column\n", | |
1685 | next_col_id); | |
198266a3 | 1686 | continue; |
6a028d9a | 1687 | } |
b3b06a32 | 1688 | |
198266a3 | 1689 | max_expected_tpt = expected_tpt_tbl[max_rate]; |
b3b06a32 ES |
1690 | if (tpt >= max_expected_tpt) { |
1691 | IWL_DEBUG_RATE(mvm, | |
1692 | "Skip column %d: can't beat current TPT. Max expected %d current %d\n", | |
1693 | next_col_id, max_expected_tpt, tpt); | |
1694 | continue; | |
1695 | } | |
1696 | ||
198266a3 ES |
1697 | IWL_DEBUG_RATE(mvm, |
1698 | "Found potential column %d. Max expected %d current %d\n", | |
1699 | next_col_id, max_expected_tpt, tpt); | |
b3b06a32 ES |
1700 | break; |
1701 | } | |
1702 | ||
1703 | if (i == MAX_NEXT_COLUMNS) | |
1704 | return RS_COLUMN_INVALID; | |
1705 | ||
b3b06a32 ES |
1706 | return next_col_id; |
1707 | } | |
1708 | ||
1709 | static int rs_switch_to_column(struct iwl_mvm *mvm, | |
1710 | struct iwl_lq_sta *lq_sta, | |
1711 | struct ieee80211_sta *sta, | |
1712 | enum rs_column col_id) | |
1713 | { | |
1714 | struct iwl_scale_tbl_info *tbl = &(lq_sta->lq_info[lq_sta->active_tbl]); | |
1715 | struct iwl_scale_tbl_info *search_tbl = | |
1716 | &(lq_sta->lq_info[(1 - lq_sta->active_tbl)]); | |
1717 | struct rs_rate *rate = &search_tbl->rate; | |
1718 | const struct rs_tx_column *column = &rs_tx_columns[col_id]; | |
1719 | const struct rs_tx_column *curr_column = &rs_tx_columns[tbl->column]; | |
1720 | u32 sz = (sizeof(struct iwl_scale_tbl_info) - | |
1721 | (sizeof(struct iwl_rate_scale_data) * IWL_RATE_COUNT)); | |
80763515 | 1722 | unsigned long rate_mask = 0; |
b3b06a32 ES |
1723 | u32 rate_idx = 0; |
1724 | ||
1725 | memcpy(search_tbl, tbl, sz); | |
1726 | ||
1727 | rate->sgi = column->sgi; | |
1728 | rate->ant = column->ant; | |
1729 | ||
1730 | if (column->mode == RS_LEGACY) { | |
1731 | if (lq_sta->band == IEEE80211_BAND_5GHZ) | |
1732 | rate->type = LQ_LEGACY_A; | |
1733 | else | |
1734 | rate->type = LQ_LEGACY_G; | |
1735 | ||
d8bafeaf ES |
1736 | rate->bw = RATE_MCS_CHAN_WIDTH_20; |
1737 | rate->ldpc = false; | |
b3b06a32 ES |
1738 | rate_mask = lq_sta->active_legacy_rate; |
1739 | } else if (column->mode == RS_SISO) { | |
1740 | rate->type = lq_sta->is_vht ? LQ_VHT_SISO : LQ_HT_SISO; | |
1741 | rate_mask = lq_sta->active_siso_rate; | |
1742 | } else if (column->mode == RS_MIMO2) { | |
1743 | rate->type = lq_sta->is_vht ? LQ_VHT_MIMO2 : LQ_HT_MIMO2; | |
1744 | rate_mask = lq_sta->active_mimo2_rate; | |
1745 | } else { | |
1746 | WARN_ON_ONCE("Bad column mode"); | |
1747 | } | |
1748 | ||
d8bafeaf ES |
1749 | if (column->mode != RS_LEGACY) { |
1750 | rate->bw = rs_bw_from_sta_bw(sta); | |
1751 | rate->ldpc = lq_sta->ldpc; | |
1752 | } | |
1753 | ||
b3b06a32 ES |
1754 | search_tbl->column = col_id; |
1755 | rs_set_expected_tpt_table(lq_sta, search_tbl); | |
1756 | ||
75d3e2d6 ES |
1757 | lq_sta->visited_columns |= BIT(col_id); |
1758 | ||
b3b06a32 ES |
1759 | /* Get the best matching rate if we're changing modes. e.g. |
1760 | * SISO->MIMO, LEGACY->SISO, MIMO->SISO | |
1761 | */ | |
1762 | if (curr_column->mode != column->mode) { | |
1763 | rate_idx = rs_get_best_rate(mvm, lq_sta, search_tbl, | |
1764 | rate_mask, rate->index); | |
1765 | ||
1766 | if ((rate_idx == IWL_RATE_INVALID) || | |
1767 | !(BIT(rate_idx) & rate_mask)) { | |
1768 | IWL_DEBUG_RATE(mvm, | |
1769 | "can not switch with index %d" | |
80763515 | 1770 | " rate mask %lx\n", |
b3b06a32 ES |
1771 | rate_idx, rate_mask); |
1772 | ||
1773 | goto err; | |
1774 | } | |
1775 | ||
1776 | rate->index = rate_idx; | |
1777 | } | |
1778 | ||
b3b06a32 ES |
1779 | IWL_DEBUG_RATE(mvm, "Switched to column %d: Index %d\n", |
1780 | col_id, rate->index); | |
1781 | ||
b3b06a32 ES |
1782 | return 0; |
1783 | ||
1784 | err: | |
1785 | rate->type = LQ_NONE; | |
1786 | return -1; | |
1787 | } | |
1788 | ||
4e4b815c ES |
1789 | static enum rs_action rs_get_rate_action(struct iwl_mvm *mvm, |
1790 | struct iwl_scale_tbl_info *tbl, | |
1791 | s32 sr, int low, int high, | |
1792 | int current_tpt, | |
1793 | int low_tpt, int high_tpt) | |
1794 | { | |
1795 | enum rs_action action = RS_ACTION_STAY; | |
1796 | ||
834437da ES |
1797 | if ((sr <= RS_PERCENT(IWL_MVM_RS_SR_FORCE_DECREASE)) || |
1798 | (current_tpt == 0)) { | |
4e4b815c | 1799 | IWL_DEBUG_RATE(mvm, |
e53839eb ES |
1800 | "Decrease rate because of low SR\n"); |
1801 | return RS_ACTION_DOWNSCALE; | |
4e4b815c ES |
1802 | } |
1803 | ||
e53839eb ES |
1804 | if ((low_tpt == IWL_INVALID_VALUE) && |
1805 | (high_tpt == IWL_INVALID_VALUE) && | |
1806 | (high != IWL_RATE_INVALID)) { | |
4e4b815c | 1807 | IWL_DEBUG_RATE(mvm, |
e53839eb ES |
1808 | "No data about high/low rates. Increase rate\n"); |
1809 | return RS_ACTION_UPSCALE; | |
4e4b815c ES |
1810 | } |
1811 | ||
e53839eb ES |
1812 | if ((high_tpt == IWL_INVALID_VALUE) && |
1813 | (high != IWL_RATE_INVALID) && | |
1814 | (low_tpt != IWL_INVALID_VALUE) && | |
1815 | (low_tpt < current_tpt)) { | |
1816 | IWL_DEBUG_RATE(mvm, | |
1817 | "No data about high rate and low rate is worse. Increase rate\n"); | |
1818 | return RS_ACTION_UPSCALE; | |
1819 | } | |
4e4b815c | 1820 | |
e53839eb ES |
1821 | if ((high_tpt != IWL_INVALID_VALUE) && |
1822 | (high_tpt > current_tpt)) { | |
1823 | IWL_DEBUG_RATE(mvm, | |
1824 | "Higher rate is better. Increate rate\n"); | |
1825 | return RS_ACTION_UPSCALE; | |
4e4b815c ES |
1826 | } |
1827 | ||
e53839eb ES |
1828 | if ((low_tpt != IWL_INVALID_VALUE) && |
1829 | (high_tpt != IWL_INVALID_VALUE) && | |
1830 | (low_tpt < current_tpt) && | |
1831 | (high_tpt < current_tpt)) { | |
4e4b815c | 1832 | IWL_DEBUG_RATE(mvm, |
e53839eb ES |
1833 | "Both high and low are worse. Maintain rate\n"); |
1834 | return RS_ACTION_STAY; | |
1835 | } | |
1836 | ||
1837 | if ((low_tpt != IWL_INVALID_VALUE) && | |
1838 | (low_tpt > current_tpt)) { | |
1839 | IWL_DEBUG_RATE(mvm, | |
1840 | "Lower rate is better\n"); | |
1841 | action = RS_ACTION_DOWNSCALE; | |
1842 | goto out; | |
1843 | } | |
1844 | ||
1845 | if ((low_tpt == IWL_INVALID_VALUE) && | |
1846 | (low != IWL_RATE_INVALID)) { | |
4e4b815c | 1847 | IWL_DEBUG_RATE(mvm, |
e53839eb ES |
1848 | "No data about lower rate\n"); |
1849 | action = RS_ACTION_DOWNSCALE; | |
1850 | goto out; | |
1851 | } | |
1852 | ||
1853 | IWL_DEBUG_RATE(mvm, "Maintain rate\n"); | |
1854 | ||
1855 | out: | |
1856 | if ((action == RS_ACTION_DOWNSCALE) && (low != IWL_RATE_INVALID)) { | |
834437da | 1857 | if (sr >= RS_PERCENT(IWL_MVM_RS_SR_NO_DECREASE)) { |
e53839eb ES |
1858 | IWL_DEBUG_RATE(mvm, |
1859 | "SR is above NO DECREASE. Avoid downscale\n"); | |
1860 | action = RS_ACTION_STAY; | |
1861 | } else if (current_tpt > (100 * tbl->expected_tpt[low])) { | |
1862 | IWL_DEBUG_RATE(mvm, | |
1863 | "Current TPT is higher than max expected in low rate. Avoid downscale\n"); | |
1864 | action = RS_ACTION_STAY; | |
1865 | } else { | |
1866 | IWL_DEBUG_RATE(mvm, "Decrease rate\n"); | |
1867 | } | |
4e4b815c ES |
1868 | } |
1869 | ||
1870 | return action; | |
1871 | } | |
b3b06a32 | 1872 | |
d8bafeaf ES |
1873 | static bool rs_stbc_allow(struct iwl_mvm *mvm, struct ieee80211_sta *sta, |
1874 | struct iwl_lq_sta *lq_sta) | |
1875 | { | |
d8bafeaf ES |
1876 | /* Our chip supports Tx STBC and the peer is an HT/VHT STA which |
1877 | * supports STBC of at least 1*SS | |
1878 | */ | |
3d44eebf | 1879 | if (!lq_sta->stbc_capable) |
d8bafeaf ES |
1880 | return false; |
1881 | ||
d8bafeaf ES |
1882 | if (!iwl_mvm_bt_coex_is_mimo_allowed(mvm, sta)) |
1883 | return false; | |
1884 | ||
1885 | return true; | |
1886 | } | |
1887 | ||
2fd647f8 EP |
1888 | static void rs_get_adjacent_txp(struct iwl_mvm *mvm, int index, |
1889 | int *weaker, int *stronger) | |
1890 | { | |
834437da | 1891 | *weaker = index + IWL_MVM_RS_TPC_TX_POWER_STEP; |
2fd647f8 EP |
1892 | if (*weaker > TPC_MAX_REDUCTION) |
1893 | *weaker = TPC_INVALID; | |
1894 | ||
834437da | 1895 | *stronger = index - IWL_MVM_RS_TPC_TX_POWER_STEP; |
2fd647f8 EP |
1896 | if (*stronger < 0) |
1897 | *stronger = TPC_INVALID; | |
1898 | } | |
1899 | ||
1e9551de ES |
1900 | static bool rs_tpc_allowed(struct iwl_mvm *mvm, struct ieee80211_vif *vif, |
1901 | struct rs_rate *rate, enum ieee80211_band band) | |
2fd647f8 EP |
1902 | { |
1903 | int index = rate->index; | |
1e9551de ES |
1904 | bool cam = (iwlmvm_mod_params.power_scheme == IWL_POWER_SCHEME_CAM); |
1905 | bool sta_ps_disabled = (vif->type == NL80211_IFTYPE_STATION && | |
1906 | !vif->bss_conf.ps); | |
2fd647f8 | 1907 | |
1e9551de ES |
1908 | IWL_DEBUG_RATE(mvm, "cam: %d sta_ps_disabled %d\n", |
1909 | cam, sta_ps_disabled); | |
2fd647f8 EP |
1910 | /* |
1911 | * allow tpc only if power management is enabled, or bt coex | |
1912 | * activity grade allows it and we are on 2.4Ghz. | |
1913 | */ | |
1e9551de | 1914 | if ((cam || sta_ps_disabled) && |
2fd647f8 EP |
1915 | !iwl_mvm_bt_coex_is_tpc_allowed(mvm, band)) |
1916 | return false; | |
1917 | ||
1918 | IWL_DEBUG_RATE(mvm, "check rate, table type: %d\n", rate->type); | |
1919 | if (is_legacy(rate)) | |
1920 | return index == IWL_RATE_54M_INDEX; | |
1921 | if (is_ht(rate)) | |
1922 | return index == IWL_RATE_MCS_7_INDEX; | |
1923 | if (is_vht(rate)) | |
1924 | return index == IWL_RATE_MCS_7_INDEX || | |
1925 | index == IWL_RATE_MCS_8_INDEX || | |
1926 | index == IWL_RATE_MCS_9_INDEX; | |
1927 | ||
1928 | WARN_ON_ONCE(1); | |
1929 | return false; | |
1930 | } | |
1931 | ||
1932 | enum tpc_action { | |
1933 | TPC_ACTION_STAY, | |
1934 | TPC_ACTION_DECREASE, | |
1935 | TPC_ACTION_INCREASE, | |
1936 | TPC_ACTION_NO_RESTIRCTION, | |
1937 | }; | |
1938 | ||
1939 | static enum tpc_action rs_get_tpc_action(struct iwl_mvm *mvm, | |
1940 | s32 sr, int weak, int strong, | |
1941 | int current_tpt, | |
1942 | int weak_tpt, int strong_tpt) | |
1943 | { | |
1944 | /* stay until we have valid tpt */ | |
1945 | if (current_tpt == IWL_INVALID_VALUE) { | |
1946 | IWL_DEBUG_RATE(mvm, "no current tpt. stay.\n"); | |
1947 | return TPC_ACTION_STAY; | |
1948 | } | |
1949 | ||
1950 | /* Too many failures, increase txp */ | |
834437da ES |
1951 | if (sr <= RS_PERCENT(IWL_MVM_RS_TPC_SR_FORCE_INCREASE) || |
1952 | current_tpt == 0) { | |
2fd647f8 EP |
1953 | IWL_DEBUG_RATE(mvm, "increase txp because of weak SR\n"); |
1954 | return TPC_ACTION_NO_RESTIRCTION; | |
1955 | } | |
1956 | ||
1957 | /* try decreasing first if applicable */ | |
1958 | if (weak != TPC_INVALID) { | |
1959 | if (weak_tpt == IWL_INVALID_VALUE && | |
1960 | (strong_tpt == IWL_INVALID_VALUE || | |
1961 | current_tpt >= strong_tpt)) { | |
1962 | IWL_DEBUG_RATE(mvm, | |
1963 | "no weak txp measurement. decrease txp\n"); | |
1964 | return TPC_ACTION_DECREASE; | |
1965 | } | |
1966 | ||
1967 | if (weak_tpt > current_tpt) { | |
1968 | IWL_DEBUG_RATE(mvm, | |
1969 | "lower txp has better tpt. decrease txp\n"); | |
1970 | return TPC_ACTION_DECREASE; | |
1971 | } | |
1972 | } | |
1973 | ||
1974 | /* next, increase if needed */ | |
834437da ES |
1975 | if (sr < RS_PERCENT(IWL_MVM_RS_TPC_SR_NO_INCREASE) && |
1976 | strong != TPC_INVALID) { | |
2fd647f8 EP |
1977 | if (weak_tpt == IWL_INVALID_VALUE && |
1978 | strong_tpt != IWL_INVALID_VALUE && | |
1979 | current_tpt < strong_tpt) { | |
1980 | IWL_DEBUG_RATE(mvm, | |
1981 | "higher txp has better tpt. increase txp\n"); | |
1982 | return TPC_ACTION_INCREASE; | |
1983 | } | |
1984 | ||
1985 | if (weak_tpt < current_tpt && | |
1986 | (strong_tpt == IWL_INVALID_VALUE || | |
1987 | strong_tpt > current_tpt)) { | |
1988 | IWL_DEBUG_RATE(mvm, | |
1989 | "lower txp has worse tpt. increase txp\n"); | |
1990 | return TPC_ACTION_INCREASE; | |
1991 | } | |
1992 | } | |
1993 | ||
1994 | IWL_DEBUG_RATE(mvm, "no need to increase or decrease txp - stay\n"); | |
1995 | return TPC_ACTION_STAY; | |
1996 | } | |
1997 | ||
1998 | static bool rs_tpc_perform(struct iwl_mvm *mvm, | |
1999 | struct ieee80211_sta *sta, | |
2000 | struct iwl_lq_sta *lq_sta, | |
2001 | struct iwl_scale_tbl_info *tbl) | |
2002 | { | |
9d8ce6af | 2003 | struct iwl_mvm_sta *mvm_sta = iwl_mvm_sta_from_mac80211(sta); |
2fd647f8 EP |
2004 | struct ieee80211_vif *vif = mvm_sta->vif; |
2005 | struct ieee80211_chanctx_conf *chanctx_conf; | |
2006 | enum ieee80211_band band; | |
2007 | struct iwl_rate_scale_data *window; | |
2008 | struct rs_rate *rate = &tbl->rate; | |
2009 | enum tpc_action action; | |
2010 | s32 sr; | |
2011 | u8 cur = lq_sta->lq.reduced_tpc; | |
2012 | int current_tpt; | |
2013 | int weak, strong; | |
2014 | int weak_tpt = IWL_INVALID_VALUE, strong_tpt = IWL_INVALID_VALUE; | |
2015 | ||
9a75b3df | 2016 | #ifdef CONFIG_MAC80211_DEBUGFS |
ae969afe | 2017 | if (lq_sta->pers.dbg_fixed_txp_reduction <= TPC_MAX_REDUCTION) { |
3c6acb61 | 2018 | IWL_DEBUG_RATE(mvm, "fixed tpc: %d\n", |
ae969afe EP |
2019 | lq_sta->pers.dbg_fixed_txp_reduction); |
2020 | lq_sta->lq.reduced_tpc = lq_sta->pers.dbg_fixed_txp_reduction; | |
2021 | return cur != lq_sta->pers.dbg_fixed_txp_reduction; | |
9a75b3df EP |
2022 | } |
2023 | #endif | |
2024 | ||
2fd647f8 EP |
2025 | rcu_read_lock(); |
2026 | chanctx_conf = rcu_dereference(vif->chanctx_conf); | |
2027 | if (WARN_ON(!chanctx_conf)) | |
2028 | band = IEEE80211_NUM_BANDS; | |
2029 | else | |
2030 | band = chanctx_conf->def.chan->band; | |
2031 | rcu_read_unlock(); | |
2032 | ||
1e9551de | 2033 | if (!rs_tpc_allowed(mvm, vif, rate, band)) { |
2fd647f8 | 2034 | IWL_DEBUG_RATE(mvm, |
3c6acb61 | 2035 | "tpc is not allowed. remove txp restrictions\n"); |
2fd647f8 EP |
2036 | lq_sta->lq.reduced_tpc = TPC_NO_REDUCTION; |
2037 | return cur != TPC_NO_REDUCTION; | |
2038 | } | |
2039 | ||
2040 | rs_get_adjacent_txp(mvm, cur, &weak, &strong); | |
2041 | ||
2042 | /* Collect measured throughputs for current and adjacent rates */ | |
2043 | window = tbl->tpc_win; | |
2044 | sr = window[cur].success_ratio; | |
2045 | current_tpt = window[cur].average_tpt; | |
2046 | if (weak != TPC_INVALID) | |
2047 | weak_tpt = window[weak].average_tpt; | |
2048 | if (strong != TPC_INVALID) | |
2049 | strong_tpt = window[strong].average_tpt; | |
2050 | ||
2051 | IWL_DEBUG_RATE(mvm, | |
2052 | "(TPC: %d): cur_tpt %d SR %d weak %d strong %d weak_tpt %d strong_tpt %d\n", | |
2053 | cur, current_tpt, sr, weak, strong, | |
2054 | weak_tpt, strong_tpt); | |
2055 | ||
2056 | action = rs_get_tpc_action(mvm, sr, weak, strong, | |
2057 | current_tpt, weak_tpt, strong_tpt); | |
2058 | ||
2059 | /* override actions if we are on the edge */ | |
2060 | if (weak == TPC_INVALID && action == TPC_ACTION_DECREASE) { | |
3c6acb61 | 2061 | IWL_DEBUG_RATE(mvm, "already in lowest txp, stay\n"); |
2fd647f8 EP |
2062 | action = TPC_ACTION_STAY; |
2063 | } else if (strong == TPC_INVALID && | |
2064 | (action == TPC_ACTION_INCREASE || | |
2065 | action == TPC_ACTION_NO_RESTIRCTION)) { | |
3c6acb61 | 2066 | IWL_DEBUG_RATE(mvm, "already in highest txp, stay\n"); |
2fd647f8 EP |
2067 | action = TPC_ACTION_STAY; |
2068 | } | |
2069 | ||
2070 | switch (action) { | |
2071 | case TPC_ACTION_DECREASE: | |
2072 | lq_sta->lq.reduced_tpc = weak; | |
2073 | return true; | |
2074 | case TPC_ACTION_INCREASE: | |
2075 | lq_sta->lq.reduced_tpc = strong; | |
2076 | return true; | |
2077 | case TPC_ACTION_NO_RESTIRCTION: | |
2078 | lq_sta->lq.reduced_tpc = TPC_NO_REDUCTION; | |
2079 | return true; | |
2080 | case TPC_ACTION_STAY: | |
2081 | /* do nothing */ | |
2082 | break; | |
2083 | } | |
2084 | return false; | |
2085 | } | |
2086 | ||
8ca151b5 JB |
2087 | /* |
2088 | * Do rate scaling and search for new modulation mode. | |
2089 | */ | |
2090 | static void rs_rate_scale_perform(struct iwl_mvm *mvm, | |
8ca151b5 | 2091 | struct ieee80211_sta *sta, |
1ebc8f2e ES |
2092 | struct iwl_lq_sta *lq_sta, |
2093 | int tid) | |
8ca151b5 | 2094 | { |
8ca151b5 JB |
2095 | int low = IWL_RATE_INVALID; |
2096 | int high = IWL_RATE_INVALID; | |
2097 | int index; | |
8ca151b5 JB |
2098 | struct iwl_rate_scale_data *window = NULL; |
2099 | int current_tpt = IWL_INVALID_VALUE; | |
2100 | int low_tpt = IWL_INVALID_VALUE; | |
2101 | int high_tpt = IWL_INVALID_VALUE; | |
2102 | u32 fail_count; | |
4e4b815c | 2103 | enum rs_action scale_action = RS_ACTION_STAY; |
8ca151b5 JB |
2104 | u16 rate_mask; |
2105 | u8 update_lq = 0; | |
2106 | struct iwl_scale_tbl_info *tbl, *tbl1; | |
8ca151b5 JB |
2107 | u8 active_tbl = 0; |
2108 | u8 done_search = 0; | |
2109 | u16 high_low; | |
2110 | s32 sr; | |
9d015a03 | 2111 | u8 prev_agg = lq_sta->is_agg; |
9d8ce6af | 2112 | struct iwl_mvm_sta *sta_priv = iwl_mvm_sta_from_mac80211(sta); |
8ca151b5 | 2113 | struct iwl_mvm_tid_data *tid_data; |
5aa33553 | 2114 | struct rs_rate *rate; |
8ca151b5 | 2115 | |
efed6640 | 2116 | lq_sta->is_agg = !!sta_priv->agg_tids; |
8ca151b5 JB |
2117 | |
2118 | /* | |
2119 | * Select rate-scale / modulation-mode table to work with in | |
2120 | * the rest of this function: "search" if searching for better | |
2121 | * modulation mode, or "active" if doing rate scaling within a mode. | |
2122 | */ | |
2123 | if (!lq_sta->search_better_tbl) | |
2124 | active_tbl = lq_sta->active_tbl; | |
2125 | else | |
2126 | active_tbl = 1 - lq_sta->active_tbl; | |
2127 | ||
2128 | tbl = &(lq_sta->lq_info[active_tbl]); | |
5aa33553 | 2129 | rate = &tbl->rate; |
8ca151b5 | 2130 | |
9d015a03 ES |
2131 | if (prev_agg != lq_sta->is_agg) { |
2132 | IWL_DEBUG_RATE(mvm, | |
2133 | "Aggregation changed: prev %d current %d. Update expected TPT table\n", | |
2134 | prev_agg, lq_sta->is_agg); | |
2135 | rs_set_expected_tpt_table(lq_sta, tbl); | |
b804eeb6 | 2136 | rs_rate_scale_clear_tbl_windows(mvm, tbl); |
9d015a03 ES |
2137 | } |
2138 | ||
8ca151b5 | 2139 | /* current tx rate */ |
fcc5e851 | 2140 | index = rate->index; |
8ca151b5 | 2141 | |
8ca151b5 | 2142 | /* rates available for this association, and for modulation mode */ |
a8ff14f5 | 2143 | rate_mask = rs_get_supported_rates(lq_sta, rate); |
8ca151b5 | 2144 | |
ca6f38ff | 2145 | if (!(BIT(index) & rate_mask)) { |
8ca151b5 JB |
2146 | IWL_ERR(mvm, "Current Rate is not valid\n"); |
2147 | if (lq_sta->search_better_tbl) { | |
2148 | /* revert to active table if search table is not valid*/ | |
5aa33553 | 2149 | rate->type = LQ_NONE; |
8ca151b5 JB |
2150 | lq_sta->search_better_tbl = 0; |
2151 | tbl = &(lq_sta->lq_info[lq_sta->active_tbl]); | |
7b9d74e4 | 2152 | rs_update_rate_tbl(mvm, sta, lq_sta, tbl); |
8ca151b5 JB |
2153 | } |
2154 | return; | |
2155 | } | |
2156 | ||
2157 | /* Get expected throughput table and history window for current rate */ | |
2158 | if (!tbl->expected_tpt) { | |
2159 | IWL_ERR(mvm, "tbl->expected_tpt is NULL\n"); | |
2160 | return; | |
2161 | } | |
2162 | ||
2536e7c3 | 2163 | /* TODO: handle rate_idx_mask and rate_idx_mcs_mask */ |
8ca151b5 JB |
2164 | window = &(tbl->win[index]); |
2165 | ||
2166 | /* | |
2167 | * If there is not enough history to calculate actual average | |
2168 | * throughput, keep analyzing results of more tx frames, without | |
2169 | * changing rate or mode (bypass most of the rest of this function). | |
2170 | * Set up new rate table in uCode only if old rate is not supported | |
2171 | * in current association (use new rate found above). | |
2172 | */ | |
2173 | fail_count = window->counter - window->success_counter; | |
834437da ES |
2174 | if ((fail_count < IWL_MVM_RS_RATE_MIN_FAILURE_TH) && |
2175 | (window->success_counter < IWL_MVM_RS_RATE_MIN_SUCCESS_TH)) { | |
8ca151b5 | 2176 | IWL_DEBUG_RATE(mvm, |
4d30ee82 | 2177 | "(%s: %d): Test Window: succ %d total %d\n", |
5aa33553 | 2178 | rs_pretty_lq_type(rate->type), |
4d30ee82 | 2179 | index, window->success_counter, window->counter); |
8ca151b5 JB |
2180 | |
2181 | /* Can't calculate this yet; not enough history */ | |
2182 | window->average_tpt = IWL_INVALID_VALUE; | |
2183 | ||
2184 | /* Should we stay with this modulation mode, | |
2185 | * or search for a new one? */ | |
2186 | rs_stay_in_table(lq_sta, false); | |
2187 | ||
fcc5e851 | 2188 | return; |
8ca151b5 | 2189 | } |
8ca151b5 JB |
2190 | |
2191 | /* If we are searching for better modulation mode, check success. */ | |
2192 | if (lq_sta->search_better_tbl) { | |
2193 | /* If good success, continue using the "search" mode; | |
2194 | * no need to send new link quality command, since we're | |
2195 | * continuing to use the setup that we've been trying. */ | |
2196 | if (window->average_tpt > lq_sta->last_tpt) { | |
2197 | IWL_DEBUG_RATE(mvm, | |
4d30ee82 ES |
2198 | "SWITCHING TO NEW TABLE SR: %d " |
2199 | "cur-tpt %d old-tpt %d\n", | |
8ca151b5 JB |
2200 | window->success_ratio, |
2201 | window->average_tpt, | |
2202 | lq_sta->last_tpt); | |
2203 | ||
8ca151b5 JB |
2204 | /* Swap tables; "search" becomes "active" */ |
2205 | lq_sta->active_tbl = active_tbl; | |
2206 | current_tpt = window->average_tpt; | |
2207 | /* Else poor success; go back to mode in "active" table */ | |
2208 | } else { | |
2209 | IWL_DEBUG_RATE(mvm, | |
4d30ee82 ES |
2210 | "GOING BACK TO THE OLD TABLE: SR %d " |
2211 | "cur-tpt %d old-tpt %d\n", | |
8ca151b5 JB |
2212 | window->success_ratio, |
2213 | window->average_tpt, | |
2214 | lq_sta->last_tpt); | |
2215 | ||
2216 | /* Nullify "search" table */ | |
5aa33553 | 2217 | rate->type = LQ_NONE; |
8ca151b5 JB |
2218 | |
2219 | /* Revert to "active" table */ | |
2220 | active_tbl = lq_sta->active_tbl; | |
2221 | tbl = &(lq_sta->lq_info[active_tbl]); | |
2222 | ||
2223 | /* Revert to "active" rate and throughput info */ | |
8fc7c58c | 2224 | index = tbl->rate.index; |
8ca151b5 JB |
2225 | current_tpt = lq_sta->last_tpt; |
2226 | ||
2227 | /* Need to set up a new rate table in uCode */ | |
2228 | update_lq = 1; | |
2229 | } | |
2230 | ||
2231 | /* Either way, we've made a decision; modulation mode | |
2232 | * search is done, allow rate adjustment next time. */ | |
2233 | lq_sta->search_better_tbl = 0; | |
2234 | done_search = 1; /* Don't switch modes below! */ | |
2235 | goto lq_update; | |
2236 | } | |
2237 | ||
2238 | /* (Else) not in search of better modulation mode, try for better | |
2239 | * starting rate, while staying in this mode. */ | |
ca6f38ff | 2240 | high_low = rs_get_adjacent_rate(mvm, index, rate_mask, rate->type); |
8ca151b5 JB |
2241 | low = high_low & 0xff; |
2242 | high = (high_low >> 8) & 0xff; | |
2243 | ||
2536e7c3 | 2244 | /* TODO: handle rate_idx_mask and rate_idx_mcs_mask */ |
8ca151b5 JB |
2245 | |
2246 | sr = window->success_ratio; | |
2247 | ||
2248 | /* Collect measured throughputs for current and adjacent rates */ | |
2249 | current_tpt = window->average_tpt; | |
2250 | if (low != IWL_RATE_INVALID) | |
2251 | low_tpt = tbl->win[low].average_tpt; | |
2252 | if (high != IWL_RATE_INVALID) | |
2253 | high_tpt = tbl->win[high].average_tpt; | |
2254 | ||
4d30ee82 ES |
2255 | IWL_DEBUG_RATE(mvm, |
2256 | "(%s: %d): cur_tpt %d SR %d low %d high %d low_tpt %d high_tpt %d\n", | |
5aa33553 ES |
2257 | rs_pretty_lq_type(rate->type), index, current_tpt, sr, |
2258 | low, high, low_tpt, high_tpt); | |
4d30ee82 | 2259 | |
4e4b815c ES |
2260 | scale_action = rs_get_rate_action(mvm, tbl, sr, low, high, |
2261 | current_tpt, low_tpt, high_tpt); | |
8ca151b5 | 2262 | |
393b9e5b | 2263 | /* Force a search in case BT doesn't like us being in MIMO */ |
5aa33553 | 2264 | if (is_mimo(rate) && |
393b9e5b | 2265 | !iwl_mvm_bt_coex_is_mimo_allowed(mvm, sta)) { |
4d30ee82 ES |
2266 | IWL_DEBUG_RATE(mvm, |
2267 | "BT Coex forbids MIMO. Search for new config\n"); | |
36946ce6 EG |
2268 | rs_stay_in_table(lq_sta, true); |
2269 | goto lq_update; | |
2270 | } | |
2271 | ||
8ca151b5 | 2272 | switch (scale_action) { |
4e4b815c | 2273 | case RS_ACTION_DOWNSCALE: |
8ca151b5 JB |
2274 | /* Decrease starting rate, update uCode's rate table */ |
2275 | if (low != IWL_RATE_INVALID) { | |
2276 | update_lq = 1; | |
2277 | index = low; | |
4d30ee82 ES |
2278 | } else { |
2279 | IWL_DEBUG_RATE(mvm, | |
2280 | "At the bottom rate. Can't decrease\n"); | |
8ca151b5 JB |
2281 | } |
2282 | ||
2283 | break; | |
4e4b815c | 2284 | case RS_ACTION_UPSCALE: |
8ca151b5 JB |
2285 | /* Increase starting rate, update uCode's rate table */ |
2286 | if (high != IWL_RATE_INVALID) { | |
2287 | update_lq = 1; | |
2288 | index = high; | |
4d30ee82 ES |
2289 | } else { |
2290 | IWL_DEBUG_RATE(mvm, | |
2291 | "At the top rate. Can't increase\n"); | |
8ca151b5 JB |
2292 | } |
2293 | ||
2294 | break; | |
4e4b815c | 2295 | case RS_ACTION_STAY: |
8ca151b5 | 2296 | /* No change */ |
e6c8d602 ES |
2297 | if (lq_sta->rs_state == RS_STATE_STAY_IN_COLUMN) |
2298 | update_lq = rs_tpc_perform(mvm, sta, lq_sta, tbl); | |
2fd647f8 | 2299 | break; |
8ca151b5 JB |
2300 | default: |
2301 | break; | |
2302 | } | |
2303 | ||
8ca151b5 JB |
2304 | lq_update: |
2305 | /* Replace uCode's rate table for the destination station. */ | |
5aa33553 ES |
2306 | if (update_lq) { |
2307 | tbl->rate.index = index; | |
7b9d74e4 | 2308 | rs_update_rate_tbl(mvm, sta, lq_sta, tbl); |
5aa33553 | 2309 | } |
8ca151b5 JB |
2310 | |
2311 | rs_stay_in_table(lq_sta, false); | |
2312 | ||
2313 | /* | |
2314 | * Search for new modulation mode if we're: | |
2315 | * 1) Not changing rates right now | |
2316 | * 2) Not just finishing up a search | |
2317 | * 3) Allowing a new search | |
2318 | */ | |
2319 | if (!update_lq && !done_search && | |
b3b06a32 ES |
2320 | lq_sta->rs_state == RS_STATE_SEARCH_CYCLE_STARTED |
2321 | && window->counter) { | |
2322 | enum rs_column next_column; | |
2323 | ||
8ca151b5 JB |
2324 | /* Save current throughput to compare with "search" throughput*/ |
2325 | lq_sta->last_tpt = current_tpt; | |
2326 | ||
4d30ee82 | 2327 | IWL_DEBUG_RATE(mvm, |
b3b06a32 ES |
2328 | "Start Search: update_lq %d done_search %d rs_state %d win->counter %d\n", |
2329 | update_lq, done_search, lq_sta->rs_state, | |
4d30ee82 | 2330 | window->counter); |
b3b06a32 ES |
2331 | |
2332 | next_column = rs_get_next_column(mvm, lq_sta, sta, tbl); | |
2333 | if (next_column != RS_COLUMN_INVALID) { | |
2334 | int ret = rs_switch_to_column(mvm, lq_sta, sta, | |
2335 | next_column); | |
2336 | if (!ret) | |
2337 | lq_sta->search_better_tbl = 1; | |
2338 | } else { | |
2339 | IWL_DEBUG_RATE(mvm, | |
2340 | "No more columns to explore in search cycle. Go to RS_STATE_SEARCH_CYCLE_ENDED\n"); | |
2341 | lq_sta->rs_state = RS_STATE_SEARCH_CYCLE_ENDED; | |
2342 | } | |
8ca151b5 JB |
2343 | |
2344 | /* If new "search" mode was selected, set up in uCode table */ | |
2345 | if (lq_sta->search_better_tbl) { | |
2346 | /* Access the "search" table, clear its history. */ | |
2347 | tbl = &(lq_sta->lq_info[(1 - lq_sta->active_tbl)]); | |
b804eeb6 | 2348 | rs_rate_scale_clear_tbl_windows(mvm, tbl); |
8ca151b5 JB |
2349 | |
2350 | /* Use new "search" start rate */ | |
8fc7c58c | 2351 | index = tbl->rate.index; |
8ca151b5 | 2352 | |
b3b06a32 ES |
2353 | rs_dump_rate(mvm, &tbl->rate, |
2354 | "Switch to SEARCH TABLE:"); | |
7b9d74e4 | 2355 | rs_update_rate_tbl(mvm, sta, lq_sta, tbl); |
8ca151b5 JB |
2356 | } else { |
2357 | done_search = 1; | |
2358 | } | |
2359 | } | |
2360 | ||
b3b06a32 | 2361 | if (done_search && lq_sta->rs_state == RS_STATE_SEARCH_CYCLE_ENDED) { |
8ca151b5 JB |
2362 | /* If the "active" (non-search) mode was legacy, |
2363 | * and we've tried switching antennas, | |
2364 | * but we haven't been able to try HT modes (not available), | |
2365 | * stay with best antenna legacy modulation for a while | |
2366 | * before next round of mode comparisons. */ | |
2367 | tbl1 = &(lq_sta->lq_info[lq_sta->active_tbl]); | |
fd7dbee5 | 2368 | if (is_legacy(&tbl1->rate)) { |
8ca151b5 | 2369 | IWL_DEBUG_RATE(mvm, "LQ: STAY in legacy table\n"); |
fd7dbee5 ES |
2370 | |
2371 | if (tid != IWL_MAX_TID_COUNT) { | |
2372 | tid_data = &sta_priv->tid_data[tid]; | |
2373 | if (tid_data->state != IWL_AGG_OFF) { | |
2374 | IWL_DEBUG_RATE(mvm, | |
2375 | "Stop aggregation on tid %d\n", | |
2376 | tid); | |
2377 | ieee80211_stop_tx_ba_session(sta, tid); | |
2378 | } | |
2379 | } | |
8ca151b5 | 2380 | rs_set_stay_in_table(mvm, 1, lq_sta); |
b3b06a32 | 2381 | } else { |
8ca151b5 JB |
2382 | /* If we're in an HT mode, and all 3 mode switch actions |
2383 | * have been tried and compared, stay in this best modulation | |
2384 | * mode for a while before next round of mode comparisons. */ | |
8ca151b5 JB |
2385 | if ((lq_sta->last_tpt > IWL_AGG_TPT_THREHOLD) && |
2386 | (lq_sta->tx_agg_tid_en & (1 << tid)) && | |
2387 | (tid != IWL_MAX_TID_COUNT)) { | |
2388 | tid_data = &sta_priv->tid_data[tid]; | |
2389 | if (tid_data->state == IWL_AGG_OFF) { | |
2390 | IWL_DEBUG_RATE(mvm, | |
2391 | "try to aggregate tid %d\n", | |
2392 | tid); | |
2393 | rs_tl_turn_on_agg(mvm, tid, | |
2394 | lq_sta, sta); | |
2395 | } | |
2396 | } | |
2397 | rs_set_stay_in_table(mvm, 0, lq_sta); | |
2398 | } | |
2399 | } | |
8ca151b5 JB |
2400 | } |
2401 | ||
361dbec8 ES |
2402 | struct rs_init_rate_info { |
2403 | s8 rssi; | |
2404 | u8 rate_idx; | |
2405 | }; | |
2406 | ||
b503ed60 | 2407 | static const struct rs_init_rate_info rs_optimal_rates_24ghz_legacy[] = { |
361dbec8 ES |
2408 | { -60, IWL_RATE_54M_INDEX }, |
2409 | { -64, IWL_RATE_48M_INDEX }, | |
2410 | { -68, IWL_RATE_36M_INDEX }, | |
2411 | { -80, IWL_RATE_24M_INDEX }, | |
2412 | { -84, IWL_RATE_18M_INDEX }, | |
2413 | { -85, IWL_RATE_12M_INDEX }, | |
2414 | { -86, IWL_RATE_11M_INDEX }, | |
2415 | { -88, IWL_RATE_5M_INDEX }, | |
2416 | { -90, IWL_RATE_2M_INDEX }, | |
2417 | { S8_MIN, IWL_RATE_1M_INDEX }, | |
2418 | }; | |
2419 | ||
b503ed60 | 2420 | static const struct rs_init_rate_info rs_optimal_rates_5ghz_legacy[] = { |
361dbec8 ES |
2421 | { -60, IWL_RATE_54M_INDEX }, |
2422 | { -64, IWL_RATE_48M_INDEX }, | |
2423 | { -72, IWL_RATE_36M_INDEX }, | |
2424 | { -80, IWL_RATE_24M_INDEX }, | |
2425 | { -84, IWL_RATE_18M_INDEX }, | |
2426 | { -85, IWL_RATE_12M_INDEX }, | |
2427 | { -87, IWL_RATE_9M_INDEX }, | |
2428 | { S8_MIN, IWL_RATE_6M_INDEX }, | |
2429 | }; | |
2430 | ||
b503ed60 ES |
2431 | static const struct rs_init_rate_info rs_optimal_rates_ht[] = { |
2432 | { -60, IWL_RATE_MCS_7_INDEX }, | |
2433 | { -64, IWL_RATE_MCS_6_INDEX }, | |
2434 | { -68, IWL_RATE_MCS_5_INDEX }, | |
2435 | { -72, IWL_RATE_MCS_4_INDEX }, | |
2436 | { -80, IWL_RATE_MCS_3_INDEX }, | |
2437 | { -84, IWL_RATE_MCS_2_INDEX }, | |
2438 | { -85, IWL_RATE_MCS_1_INDEX }, | |
2439 | { S8_MIN, IWL_RATE_MCS_0_INDEX}, | |
2440 | }; | |
2441 | ||
2442 | static const struct rs_init_rate_info rs_optimal_rates_vht_20mhz[] = { | |
2443 | { -60, IWL_RATE_MCS_8_INDEX }, | |
2444 | { -64, IWL_RATE_MCS_7_INDEX }, | |
2445 | { -68, IWL_RATE_MCS_6_INDEX }, | |
2446 | { -72, IWL_RATE_MCS_5_INDEX }, | |
2447 | { -80, IWL_RATE_MCS_4_INDEX }, | |
2448 | { -84, IWL_RATE_MCS_3_INDEX }, | |
2449 | { -85, IWL_RATE_MCS_2_INDEX }, | |
2450 | { -87, IWL_RATE_MCS_1_INDEX }, | |
2451 | { S8_MIN, IWL_RATE_MCS_0_INDEX}, | |
2452 | }; | |
2453 | ||
2454 | static const struct rs_init_rate_info rs_optimal_rates_vht_40_80mhz[] = { | |
2455 | { -60, IWL_RATE_MCS_9_INDEX }, | |
2456 | { -64, IWL_RATE_MCS_8_INDEX }, | |
2457 | { -68, IWL_RATE_MCS_7_INDEX }, | |
2458 | { -72, IWL_RATE_MCS_6_INDEX }, | |
2459 | { -80, IWL_RATE_MCS_5_INDEX }, | |
2460 | { -84, IWL_RATE_MCS_4_INDEX }, | |
2461 | { -85, IWL_RATE_MCS_3_INDEX }, | |
2462 | { -87, IWL_RATE_MCS_2_INDEX }, | |
2463 | { -88, IWL_RATE_MCS_1_INDEX }, | |
2464 | { S8_MIN, IWL_RATE_MCS_0_INDEX }, | |
2465 | }; | |
2466 | ||
2467 | /* Init the optimal rate based on STA caps | |
2468 | * This combined with rssi is used to report the last tx rate | |
2469 | * to userspace when we haven't transmitted enough frames. | |
2470 | */ | |
2471 | static void rs_init_optimal_rate(struct iwl_mvm *mvm, | |
2472 | struct ieee80211_sta *sta, | |
2473 | struct iwl_lq_sta *lq_sta) | |
2474 | { | |
2475 | struct rs_rate *rate = &lq_sta->optimal_rate; | |
2476 | ||
2477 | if (lq_sta->max_mimo2_rate_idx != IWL_RATE_INVALID) | |
2478 | rate->type = lq_sta->is_vht ? LQ_VHT_MIMO2 : LQ_HT_MIMO2; | |
2479 | else if (lq_sta->max_siso_rate_idx != IWL_RATE_INVALID) | |
2480 | rate->type = lq_sta->is_vht ? LQ_VHT_SISO : LQ_HT_SISO; | |
2481 | else if (lq_sta->band == IEEE80211_BAND_5GHZ) | |
2482 | rate->type = LQ_LEGACY_A; | |
2483 | else | |
2484 | rate->type = LQ_LEGACY_G; | |
2485 | ||
2486 | rate->bw = rs_bw_from_sta_bw(sta); | |
2487 | rate->sgi = rs_sgi_allow(mvm, sta, rate, NULL); | |
2488 | ||
2489 | /* ANT/LDPC/STBC aren't relevant for the rate reported to userspace */ | |
2490 | ||
2491 | if (is_mimo(rate)) { | |
2492 | lq_sta->optimal_rate_mask = lq_sta->active_mimo2_rate; | |
2493 | } else if (is_siso(rate)) { | |
2494 | lq_sta->optimal_rate_mask = lq_sta->active_siso_rate; | |
2495 | } else { | |
2496 | lq_sta->optimal_rate_mask = lq_sta->active_legacy_rate; | |
2497 | ||
2498 | if (lq_sta->band == IEEE80211_BAND_5GHZ) { | |
2499 | lq_sta->optimal_rates = rs_optimal_rates_5ghz_legacy; | |
2500 | lq_sta->optimal_nentries = | |
2501 | ARRAY_SIZE(rs_optimal_rates_5ghz_legacy); | |
2502 | } else { | |
2503 | lq_sta->optimal_rates = rs_optimal_rates_24ghz_legacy; | |
2504 | lq_sta->optimal_nentries = | |
2505 | ARRAY_SIZE(rs_optimal_rates_24ghz_legacy); | |
2506 | } | |
2507 | } | |
2508 | ||
2509 | if (is_vht(rate)) { | |
2510 | if (rate->bw == RATE_MCS_CHAN_WIDTH_20) { | |
2511 | lq_sta->optimal_rates = rs_optimal_rates_vht_20mhz; | |
2512 | lq_sta->optimal_nentries = | |
2513 | ARRAY_SIZE(rs_optimal_rates_vht_20mhz); | |
2514 | } else { | |
2515 | lq_sta->optimal_rates = rs_optimal_rates_vht_40_80mhz; | |
2516 | lq_sta->optimal_nentries = | |
2517 | ARRAY_SIZE(rs_optimal_rates_vht_40_80mhz); | |
2518 | } | |
2519 | } else if (is_ht(rate)) { | |
2520 | lq_sta->optimal_rates = rs_optimal_rates_ht; | |
2521 | lq_sta->optimal_nentries = ARRAY_SIZE(rs_optimal_rates_ht); | |
2522 | } | |
2523 | } | |
2524 | ||
2525 | /* Compute the optimal rate index based on RSSI */ | |
2526 | static struct rs_rate *rs_get_optimal_rate(struct iwl_mvm *mvm, | |
2527 | struct iwl_lq_sta *lq_sta) | |
2528 | { | |
2529 | struct rs_rate *rate = &lq_sta->optimal_rate; | |
2530 | int i; | |
2531 | ||
2532 | rate->index = find_first_bit(&lq_sta->optimal_rate_mask, | |
2533 | BITS_PER_LONG); | |
2534 | ||
2535 | for (i = 0; i < lq_sta->optimal_nentries; i++) { | |
2536 | int rate_idx = lq_sta->optimal_rates[i].rate_idx; | |
2537 | ||
2538 | if ((lq_sta->pers.last_rssi >= lq_sta->optimal_rates[i].rssi) && | |
2539 | (BIT(rate_idx) & lq_sta->optimal_rate_mask)) { | |
2540 | rate->index = rate_idx; | |
2541 | break; | |
2542 | } | |
2543 | } | |
2544 | ||
2545 | rs_dump_rate(mvm, rate, "OPTIMAL RATE"); | |
2546 | return rate; | |
2547 | } | |
2548 | ||
361dbec8 ES |
2549 | /* Choose an initial legacy rate and antenna to use based on the RSSI |
2550 | * of last Rx | |
2551 | */ | |
2552 | static void rs_get_initial_rate(struct iwl_mvm *mvm, | |
2553 | struct iwl_lq_sta *lq_sta, | |
2554 | enum ieee80211_band band, | |
2555 | struct rs_rate *rate) | |
2556 | { | |
2557 | int i, nentries; | |
2558 | s8 best_rssi = S8_MIN; | |
2559 | u8 best_ant = ANT_NONE; | |
a0544272 | 2560 | u8 valid_tx_ant = iwl_mvm_get_valid_tx_ant(mvm); |
361dbec8 ES |
2561 | const struct rs_init_rate_info *initial_rates; |
2562 | ||
2563 | for (i = 0; i < ARRAY_SIZE(lq_sta->pers.chain_signal); i++) { | |
2564 | if (!(lq_sta->pers.chains & BIT(i))) | |
2565 | continue; | |
2566 | ||
2567 | if (lq_sta->pers.chain_signal[i] > best_rssi) { | |
2568 | best_rssi = lq_sta->pers.chain_signal[i]; | |
2569 | best_ant = BIT(i); | |
2570 | } | |
2571 | } | |
2572 | ||
2573 | IWL_DEBUG_RATE(mvm, "Best ANT: %s Best RSSI: %d\n", | |
2574 | rs_pretty_ant(best_ant), best_rssi); | |
2575 | ||
2576 | if (best_ant != ANT_A && best_ant != ANT_B) | |
2577 | rate->ant = first_antenna(valid_tx_ant); | |
2578 | else | |
2579 | rate->ant = best_ant; | |
2580 | ||
2581 | rate->sgi = false; | |
2582 | rate->ldpc = false; | |
2583 | rate->bw = RATE_MCS_CHAN_WIDTH_20; | |
2584 | ||
2585 | rate->index = find_first_bit(&lq_sta->active_legacy_rate, | |
2586 | BITS_PER_LONG); | |
2587 | ||
2588 | if (band == IEEE80211_BAND_5GHZ) { | |
2589 | rate->type = LQ_LEGACY_A; | |
b503ed60 ES |
2590 | initial_rates = rs_optimal_rates_5ghz_legacy; |
2591 | nentries = ARRAY_SIZE(rs_optimal_rates_5ghz_legacy); | |
361dbec8 ES |
2592 | } else { |
2593 | rate->type = LQ_LEGACY_G; | |
b503ed60 ES |
2594 | initial_rates = rs_optimal_rates_24ghz_legacy; |
2595 | nentries = ARRAY_SIZE(rs_optimal_rates_24ghz_legacy); | |
361dbec8 ES |
2596 | } |
2597 | ||
2598 | if (IWL_MVM_RS_RSSI_BASED_INIT_RATE) { | |
2599 | for (i = 0; i < nentries; i++) { | |
2600 | int rate_idx = initial_rates[i].rate_idx; | |
2601 | if ((best_rssi >= initial_rates[i].rssi) && | |
2602 | (BIT(rate_idx) & lq_sta->active_legacy_rate)) { | |
2603 | rate->index = rate_idx; | |
2604 | break; | |
2605 | } | |
2606 | } | |
2607 | } | |
2608 | ||
2609 | IWL_DEBUG_RATE(mvm, "rate_idx %d ANT %s\n", rate->index, | |
2610 | rs_pretty_ant(rate->ant)); | |
2611 | } | |
2612 | ||
2613 | /* Save info about RSSI of last Rx */ | |
2614 | void rs_update_last_rssi(struct iwl_mvm *mvm, | |
2615 | struct iwl_lq_sta *lq_sta, | |
2616 | struct ieee80211_rx_status *rx_status) | |
2617 | { | |
b503ed60 ES |
2618 | int i; |
2619 | ||
361dbec8 ES |
2620 | lq_sta->pers.chains = rx_status->chains; |
2621 | lq_sta->pers.chain_signal[0] = rx_status->chain_signal[0]; | |
2622 | lq_sta->pers.chain_signal[1] = rx_status->chain_signal[1]; | |
2623 | lq_sta->pers.chain_signal[2] = rx_status->chain_signal[2]; | |
b503ed60 ES |
2624 | lq_sta->pers.last_rssi = S8_MIN; |
2625 | ||
2626 | for (i = 0; i < ARRAY_SIZE(lq_sta->pers.chain_signal); i++) { | |
2627 | if (!(lq_sta->pers.chains & BIT(i))) | |
2628 | continue; | |
2629 | ||
2630 | if (lq_sta->pers.chain_signal[i] > lq_sta->pers.last_rssi) | |
2631 | lq_sta->pers.last_rssi = lq_sta->pers.chain_signal[i]; | |
2632 | } | |
361dbec8 ES |
2633 | } |
2634 | ||
8ca151b5 JB |
2635 | /** |
2636 | * rs_initialize_lq - Initialize a station's hardware rate table | |
2637 | * | |
2638 | * The uCode's station table contains a table of fallback rates | |
2639 | * for automatic fallback during transmission. | |
2640 | * | |
2641 | * NOTE: This sets up a default set of values. These will be replaced later | |
2642 | * if the driver's iwl-agn-rs rate scaling algorithm is used, instead of | |
2643 | * rc80211_simple. | |
2644 | * | |
2645 | * NOTE: Run REPLY_ADD_STA command to set up station table entry, before | |
2646 | * calling this function (which runs REPLY_TX_LINK_QUALITY_CMD, | |
2647 | * which requires station table entry to exist). | |
2648 | */ | |
2649 | static void rs_initialize_lq(struct iwl_mvm *mvm, | |
2650 | struct ieee80211_sta *sta, | |
2651 | struct iwl_lq_sta *lq_sta, | |
b87c2179 ES |
2652 | enum ieee80211_band band, |
2653 | bool init) | |
8ca151b5 JB |
2654 | { |
2655 | struct iwl_scale_tbl_info *tbl; | |
5aa33553 | 2656 | struct rs_rate *rate; |
8ca151b5 | 2657 | u8 active_tbl = 0; |
8ca151b5 JB |
2658 | |
2659 | if (!sta || !lq_sta) | |
2660 | return; | |
2661 | ||
8ca151b5 JB |
2662 | if (!lq_sta->search_better_tbl) |
2663 | active_tbl = lq_sta->active_tbl; | |
2664 | else | |
2665 | active_tbl = 1 - lq_sta->active_tbl; | |
2666 | ||
2667 | tbl = &(lq_sta->lq_info[active_tbl]); | |
5aa33553 | 2668 | rate = &tbl->rate; |
8ca151b5 | 2669 | |
361dbec8 | 2670 | rs_get_initial_rate(mvm, lq_sta, band, rate); |
b503ed60 | 2671 | rs_init_optimal_rate(mvm, sta, lq_sta); |
8ca151b5 | 2672 | |
b3b06a32 ES |
2673 | WARN_ON_ONCE(rate->ant != ANT_A && rate->ant != ANT_B); |
2674 | if (rate->ant == ANT_A) | |
2675 | tbl->column = RS_COLUMN_LEGACY_ANT_A; | |
2676 | else | |
2677 | tbl->column = RS_COLUMN_LEGACY_ANT_B; | |
2678 | ||
8ca151b5 | 2679 | rs_set_expected_tpt_table(lq_sta, tbl); |
80e9e5cd | 2680 | rs_fill_lq_cmd(mvm, sta, lq_sta, rate); |
8ca151b5 | 2681 | /* TODO restore station should remember the lq cmd */ |
b87c2179 | 2682 | iwl_mvm_send_lq_cmd(mvm, &lq_sta->lq, init); |
8ca151b5 JB |
2683 | } |
2684 | ||
2685 | static void rs_get_rate(void *mvm_r, struct ieee80211_sta *sta, void *mvm_sta, | |
2686 | struct ieee80211_tx_rate_control *txrc) | |
2687 | { | |
2688 | struct sk_buff *skb = txrc->skb; | |
8ca151b5 JB |
2689 | struct iwl_op_mode *op_mode __maybe_unused = |
2690 | (struct iwl_op_mode *)mvm_r; | |
2691 | struct iwl_mvm *mvm __maybe_unused = IWL_OP_MODE_GET_MVM(op_mode); | |
2692 | struct ieee80211_tx_info *info = IEEE80211_SKB_CB(skb); | |
2693 | struct iwl_lq_sta *lq_sta = mvm_sta; | |
b503ed60 ES |
2694 | struct rs_rate *optimal_rate; |
2695 | u32 last_ucode_rate; | |
8ca151b5 | 2696 | |
dcbc17ad JB |
2697 | if (sta && !iwl_mvm_sta_from_mac80211(sta)->vif) { |
2698 | /* if vif isn't initialized mvm doesn't know about | |
2699 | * this station, so don't do anything with the it | |
2700 | */ | |
2701 | sta = NULL; | |
2702 | mvm_sta = NULL; | |
2703 | } | |
2704 | ||
2536e7c3 | 2705 | /* TODO: handle rate_idx_mask and rate_idx_mcs_mask */ |
8ca151b5 JB |
2706 | |
2707 | /* Treat uninitialized rate scaling data same as non-existing. */ | |
ae969afe | 2708 | if (lq_sta && !lq_sta->pers.drv) { |
8ca151b5 JB |
2709 | IWL_DEBUG_RATE(mvm, "Rate scaling not initialized yet.\n"); |
2710 | mvm_sta = NULL; | |
2711 | } | |
2712 | ||
2713 | /* Send management frames and NO_ACK data using lowest rate. */ | |
2714 | if (rate_control_send_low(sta, mvm_sta, txrc)) | |
2715 | return; | |
2716 | ||
d310e405 ES |
2717 | iwl_mvm_hwrate_to_tx_rate(lq_sta->last_rate_n_flags, |
2718 | info->band, &info->control.rates[0]); | |
622ebe99 | 2719 | info->control.rates[0].count = 1; |
b503ed60 ES |
2720 | |
2721 | /* Report the optimal rate based on rssi and STA caps if we haven't | |
2722 | * converged yet (too little traffic) or exploring other modulations | |
2723 | */ | |
2724 | if (lq_sta->rs_state != RS_STATE_STAY_IN_COLUMN) { | |
2725 | optimal_rate = rs_get_optimal_rate(mvm, lq_sta); | |
2726 | last_ucode_rate = ucode_rate_from_rs_rate(mvm, | |
2727 | optimal_rate); | |
2728 | iwl_mvm_hwrate_to_tx_rate(last_ucode_rate, info->band, | |
2729 | &txrc->reported_rate); | |
2730 | } | |
8ca151b5 JB |
2731 | } |
2732 | ||
2733 | static void *rs_alloc_sta(void *mvm_rate, struct ieee80211_sta *sta, | |
2734 | gfp_t gfp) | |
2735 | { | |
9d8ce6af | 2736 | struct iwl_mvm_sta *sta_priv = iwl_mvm_sta_from_mac80211(sta); |
ae969afe EP |
2737 | struct iwl_op_mode *op_mode = (struct iwl_op_mode *)mvm_rate; |
2738 | struct iwl_mvm *mvm = IWL_OP_MODE_GET_MVM(op_mode); | |
2739 | struct iwl_lq_sta *lq_sta = &sta_priv->lq_sta; | |
8ca151b5 JB |
2740 | |
2741 | IWL_DEBUG_RATE(mvm, "create station rate scale window\n"); | |
2742 | ||
ae969afe EP |
2743 | lq_sta->pers.drv = mvm; |
2744 | #ifdef CONFIG_MAC80211_DEBUGFS | |
2745 | lq_sta->pers.dbg_fixed_rate = 0; | |
2746 | lq_sta->pers.dbg_fixed_txp_reduction = TPC_INVALID; | |
878985ce | 2747 | lq_sta->pers.ss_force = RS_SS_FORCE_NONE; |
ae969afe | 2748 | #endif |
361dbec8 ES |
2749 | lq_sta->pers.chains = 0; |
2750 | memset(lq_sta->pers.chain_signal, 0, sizeof(lq_sta->pers.chain_signal)); | |
b503ed60 | 2751 | lq_sta->pers.last_rssi = S8_MIN; |
ae969afe | 2752 | |
8ca151b5 JB |
2753 | return &sta_priv->lq_sta; |
2754 | } | |
2755 | ||
d310e405 ES |
2756 | static int rs_vht_highest_rx_mcs_index(struct ieee80211_sta_vht_cap *vht_cap, |
2757 | int nss) | |
2758 | { | |
2759 | u16 rx_mcs = le16_to_cpu(vht_cap->vht_mcs.rx_mcs_map) & | |
2760 | (0x3 << (2 * (nss - 1))); | |
2761 | rx_mcs >>= (2 * (nss - 1)); | |
2762 | ||
2763 | if (rx_mcs == IEEE80211_VHT_MCS_SUPPORT_0_7) | |
2764 | return IWL_RATE_MCS_7_INDEX; | |
2765 | else if (rx_mcs == IEEE80211_VHT_MCS_SUPPORT_0_8) | |
2766 | return IWL_RATE_MCS_8_INDEX; | |
2767 | else if (rx_mcs == IEEE80211_VHT_MCS_SUPPORT_0_9) | |
2768 | return IWL_RATE_MCS_9_INDEX; | |
2769 | ||
2770 | WARN_ON_ONCE(rx_mcs != IEEE80211_VHT_MCS_NOT_SUPPORTED); | |
2771 | return -1; | |
2772 | } | |
2773 | ||
750a1b45 ES |
2774 | static void rs_vht_set_enabled_rates(struct ieee80211_sta *sta, |
2775 | struct ieee80211_sta_vht_cap *vht_cap, | |
2776 | struct iwl_lq_sta *lq_sta) | |
2777 | { | |
2778 | int i; | |
2779 | int highest_mcs = rs_vht_highest_rx_mcs_index(vht_cap, 1); | |
2780 | ||
2781 | if (highest_mcs >= IWL_RATE_MCS_0_INDEX) { | |
2782 | for (i = IWL_RATE_MCS_0_INDEX; i <= highest_mcs; i++) { | |
2783 | if (i == IWL_RATE_9M_INDEX) | |
2784 | continue; | |
2785 | ||
271518ad ES |
2786 | /* VHT MCS9 isn't valid for 20Mhz for NSS=1,2 */ |
2787 | if (i == IWL_RATE_MCS_9_INDEX && | |
2788 | sta->bandwidth == IEEE80211_STA_RX_BW_20) | |
2789 | continue; | |
2790 | ||
750a1b45 ES |
2791 | lq_sta->active_siso_rate |= BIT(i); |
2792 | } | |
2793 | } | |
2794 | ||
ecc90e79 ES |
2795 | if (sta->rx_nss < 2) |
2796 | return; | |
2797 | ||
750a1b45 ES |
2798 | highest_mcs = rs_vht_highest_rx_mcs_index(vht_cap, 2); |
2799 | if (highest_mcs >= IWL_RATE_MCS_0_INDEX) { | |
2800 | for (i = IWL_RATE_MCS_0_INDEX; i <= highest_mcs; i++) { | |
2801 | if (i == IWL_RATE_9M_INDEX) | |
2802 | continue; | |
2803 | ||
271518ad ES |
2804 | /* VHT MCS9 isn't valid for 20Mhz for NSS=1,2 */ |
2805 | if (i == IWL_RATE_MCS_9_INDEX && | |
2806 | sta->bandwidth == IEEE80211_STA_RX_BW_20) | |
2807 | continue; | |
2808 | ||
750a1b45 ES |
2809 | lq_sta->active_mimo2_rate |= BIT(i); |
2810 | } | |
2811 | } | |
2812 | } | |
2813 | ||
2f15a829 JB |
2814 | static void rs_ht_init(struct iwl_mvm *mvm, |
2815 | struct ieee80211_sta *sta, | |
2816 | struct iwl_lq_sta *lq_sta, | |
2817 | struct ieee80211_sta_ht_cap *ht_cap) | |
2818 | { | |
2819 | /* active_siso_rate mask includes 9 MBits (bit 5), | |
2820 | * and CCK (bits 0-3), supp_rates[] does not; | |
2821 | * shift to convert format, force 9 MBits off. | |
2822 | */ | |
2823 | lq_sta->active_siso_rate = ht_cap->mcs.rx_mask[0] << 1; | |
2824 | lq_sta->active_siso_rate |= ht_cap->mcs.rx_mask[0] & 0x1; | |
2825 | lq_sta->active_siso_rate &= ~((u16)0x2); | |
2826 | lq_sta->active_siso_rate <<= IWL_FIRST_OFDM_RATE; | |
2827 | ||
2828 | lq_sta->active_mimo2_rate = ht_cap->mcs.rx_mask[1] << 1; | |
2829 | lq_sta->active_mimo2_rate |= ht_cap->mcs.rx_mask[1] & 0x1; | |
2830 | lq_sta->active_mimo2_rate &= ~((u16)0x2); | |
2831 | lq_sta->active_mimo2_rate <<= IWL_FIRST_OFDM_RATE; | |
2832 | ||
2833 | if (mvm->cfg->ht_params->ldpc && | |
2834 | (ht_cap->cap & IEEE80211_HT_CAP_LDPC_CODING)) | |
2835 | lq_sta->ldpc = true; | |
2836 | ||
2837 | if (mvm->cfg->ht_params->stbc && | |
2838 | (num_of_ant(iwl_mvm_get_valid_tx_ant(mvm)) > 1) && | |
2839 | (ht_cap->cap & IEEE80211_HT_CAP_RX_STBC)) | |
3d44eebf | 2840 | lq_sta->stbc_capable = true; |
2f15a829 JB |
2841 | |
2842 | lq_sta->is_vht = false; | |
2843 | } | |
2844 | ||
2845 | static void rs_vht_init(struct iwl_mvm *mvm, | |
2846 | struct ieee80211_sta *sta, | |
2847 | struct iwl_lq_sta *lq_sta, | |
2848 | struct ieee80211_sta_vht_cap *vht_cap) | |
2849 | { | |
2850 | rs_vht_set_enabled_rates(sta, vht_cap, lq_sta); | |
2851 | ||
2852 | if (mvm->cfg->ht_params->ldpc && | |
2853 | (vht_cap->cap & IEEE80211_VHT_CAP_RXLDPC)) | |
2854 | lq_sta->ldpc = true; | |
2855 | ||
2856 | if (mvm->cfg->ht_params->stbc && | |
2857 | (num_of_ant(iwl_mvm_get_valid_tx_ant(mvm)) > 1) && | |
2858 | (vht_cap->cap & IEEE80211_VHT_CAP_RXSTBC_MASK)) | |
3d44eebf ES |
2859 | lq_sta->stbc_capable = true; |
2860 | ||
859d914c | 2861 | if (fw_has_capa(&mvm->fw->ucode_capa, IWL_UCODE_TLV_CAPA_BEAMFORMER) && |
3d44eebf ES |
2862 | (num_of_ant(iwl_mvm_get_valid_tx_ant(mvm)) > 1) && |
2863 | (vht_cap->cap & IEEE80211_VHT_CAP_SU_BEAMFORMEE_CAPABLE)) | |
2864 | lq_sta->bfer_capable = true; | |
2f15a829 JB |
2865 | |
2866 | lq_sta->is_vht = true; | |
2867 | } | |
2868 | ||
5fc0f76c | 2869 | #ifdef CONFIG_IWLWIFI_DEBUGFS |
2f15a829 | 2870 | static void iwl_mvm_reset_frame_stats(struct iwl_mvm *mvm) |
5fc0f76c ES |
2871 | { |
2872 | spin_lock_bh(&mvm->drv_stats_lock); | |
2f15a829 | 2873 | memset(&mvm->drv_rx_stats, 0, sizeof(mvm->drv_rx_stats)); |
5fc0f76c ES |
2874 | spin_unlock_bh(&mvm->drv_stats_lock); |
2875 | } | |
2876 | ||
2f15a829 | 2877 | void iwl_mvm_update_frame_stats(struct iwl_mvm *mvm, u32 rate, bool agg) |
5fc0f76c ES |
2878 | { |
2879 | u8 nss = 0, mcs = 0; | |
2880 | ||
2881 | spin_lock(&mvm->drv_stats_lock); | |
2882 | ||
2883 | if (agg) | |
2f15a829 | 2884 | mvm->drv_rx_stats.agg_frames++; |
5fc0f76c | 2885 | |
2f15a829 | 2886 | mvm->drv_rx_stats.success_frames++; |
5fc0f76c ES |
2887 | |
2888 | switch (rate & RATE_MCS_CHAN_WIDTH_MSK) { | |
2889 | case RATE_MCS_CHAN_WIDTH_20: | |
2f15a829 | 2890 | mvm->drv_rx_stats.bw_20_frames++; |
5fc0f76c ES |
2891 | break; |
2892 | case RATE_MCS_CHAN_WIDTH_40: | |
2f15a829 | 2893 | mvm->drv_rx_stats.bw_40_frames++; |
5fc0f76c ES |
2894 | break; |
2895 | case RATE_MCS_CHAN_WIDTH_80: | |
2f15a829 | 2896 | mvm->drv_rx_stats.bw_80_frames++; |
5fc0f76c ES |
2897 | break; |
2898 | default: | |
2899 | WARN_ONCE(1, "bad BW. rate 0x%x", rate); | |
2900 | } | |
2901 | ||
2902 | if (rate & RATE_MCS_HT_MSK) { | |
2f15a829 | 2903 | mvm->drv_rx_stats.ht_frames++; |
5fc0f76c ES |
2904 | mcs = rate & RATE_HT_MCS_RATE_CODE_MSK; |
2905 | nss = ((rate & RATE_HT_MCS_NSS_MSK) >> RATE_HT_MCS_NSS_POS) + 1; | |
2906 | } else if (rate & RATE_MCS_VHT_MSK) { | |
2f15a829 | 2907 | mvm->drv_rx_stats.vht_frames++; |
5fc0f76c ES |
2908 | mcs = rate & RATE_VHT_MCS_RATE_CODE_MSK; |
2909 | nss = ((rate & RATE_VHT_MCS_NSS_MSK) >> | |
2910 | RATE_VHT_MCS_NSS_POS) + 1; | |
2911 | } else { | |
2f15a829 | 2912 | mvm->drv_rx_stats.legacy_frames++; |
5fc0f76c ES |
2913 | } |
2914 | ||
2915 | if (nss == 1) | |
2f15a829 | 2916 | mvm->drv_rx_stats.siso_frames++; |
5fc0f76c | 2917 | else if (nss == 2) |
2f15a829 | 2918 | mvm->drv_rx_stats.mimo2_frames++; |
5fc0f76c ES |
2919 | |
2920 | if (rate & RATE_MCS_SGI_MSK) | |
2f15a829 | 2921 | mvm->drv_rx_stats.sgi_frames++; |
5fc0f76c | 2922 | else |
2f15a829 | 2923 | mvm->drv_rx_stats.ngi_frames++; |
5fc0f76c | 2924 | |
2f15a829 JB |
2925 | mvm->drv_rx_stats.last_rates[mvm->drv_rx_stats.last_frame_idx] = rate; |
2926 | mvm->drv_rx_stats.last_frame_idx = | |
2927 | (mvm->drv_rx_stats.last_frame_idx + 1) % | |
2928 | ARRAY_SIZE(mvm->drv_rx_stats.last_rates); | |
5fc0f76c ES |
2929 | |
2930 | spin_unlock(&mvm->drv_stats_lock); | |
2931 | } | |
2932 | #endif | |
2933 | ||
8ca151b5 JB |
2934 | /* |
2935 | * Called after adding a new station to initialize rate scaling | |
2936 | */ | |
2937 | void iwl_mvm_rs_rate_init(struct iwl_mvm *mvm, struct ieee80211_sta *sta, | |
b87c2179 | 2938 | enum ieee80211_band band, bool init) |
8ca151b5 JB |
2939 | { |
2940 | int i, j; | |
2941 | struct ieee80211_hw *hw = mvm->hw; | |
2942 | struct ieee80211_sta_ht_cap *ht_cap = &sta->ht_cap; | |
d310e405 | 2943 | struct ieee80211_sta_vht_cap *vht_cap = &sta->vht_cap; |
9d8ce6af JB |
2944 | struct iwl_mvm_sta *sta_priv = iwl_mvm_sta_from_mac80211(sta); |
2945 | struct iwl_lq_sta *lq_sta = &sta_priv->lq_sta; | |
8ca151b5 JB |
2946 | struct ieee80211_supported_band *sband; |
2947 | unsigned long supp; /* must be unsigned long for for_each_set_bit */ | |
2948 | ||
ae969afe EP |
2949 | /* clear all non-persistent lq data */ |
2950 | memset(lq_sta, 0, offsetof(typeof(*lq_sta), pers)); | |
b87c2179 | 2951 | |
8ca151b5 JB |
2952 | sband = hw->wiphy->bands[band]; |
2953 | ||
2954 | lq_sta->lq.sta_id = sta_priv->sta_id; | |
2955 | ||
2956 | for (j = 0; j < LQ_SIZE; j++) | |
b804eeb6 | 2957 | rs_rate_scale_clear_tbl_windows(mvm, &lq_sta->lq_info[j]); |
8ca151b5 JB |
2958 | |
2959 | lq_sta->flush_timer = 0; | |
87d5e415 | 2960 | lq_sta->last_tx = jiffies; |
8ca151b5 JB |
2961 | |
2962 | IWL_DEBUG_RATE(mvm, | |
2963 | "LQ: *** rate scale station global init for station %d ***\n", | |
2964 | sta_priv->sta_id); | |
2965 | /* TODO: what is a good starting rate for STA? About middle? Maybe not | |
2966 | * the lowest or the highest rate.. Could consider using RSSI from | |
2967 | * previous packets? Need to have IEEE 802.1X auth succeed immediately | |
2968 | * after assoc.. */ | |
2969 | ||
834437da | 2970 | lq_sta->missed_rate_counter = IWL_MVM_RS_MISSED_RATE_MAX; |
8ca151b5 JB |
2971 | lq_sta->band = sband->band; |
2972 | /* | |
2973 | * active legacy rates as per supported rates bitmap | |
2974 | */ | |
2975 | supp = sta->supp_rates[sband->band]; | |
2976 | lq_sta->active_legacy_rate = 0; | |
2977 | for_each_set_bit(i, &supp, BITS_PER_LONG) | |
2978 | lq_sta->active_legacy_rate |= BIT(sband->bitrates[i].hw_value); | |
2979 | ||
d310e405 | 2980 | /* TODO: should probably account for rx_highest for both HT/VHT */ |
2c59d80c ES |
2981 | if (!vht_cap || !vht_cap->vht_supported) |
2982 | rs_ht_init(mvm, sta, lq_sta, ht_cap); | |
2983 | else | |
2984 | rs_vht_init(mvm, sta, lq_sta, vht_cap); | |
8ca151b5 | 2985 | |
afe08e1c | 2986 | if (IWL_MVM_RS_DISABLE_P2P_MIMO && sta_priv->vif->p2p) |
dc574e52 ES |
2987 | lq_sta->active_mimo2_rate = 0; |
2988 | ||
6a028d9a ES |
2989 | lq_sta->max_legacy_rate_idx = |
2990 | rs_get_max_rate_from_mask(lq_sta->active_legacy_rate); | |
2991 | lq_sta->max_siso_rate_idx = | |
2992 | rs_get_max_rate_from_mask(lq_sta->active_siso_rate); | |
2993 | lq_sta->max_mimo2_rate_idx = | |
2994 | rs_get_max_rate_from_mask(lq_sta->active_mimo2_rate); | |
198266a3 | 2995 | |
a3576ff2 | 2996 | IWL_DEBUG_RATE(mvm, |
3d44eebf | 2997 | "LEGACY=%lX SISO=%lX MIMO2=%lX VHT=%d LDPC=%d STBC=%d BFER=%d\n", |
198266a3 | 2998 | lq_sta->active_legacy_rate, |
8ca151b5 | 2999 | lq_sta->active_siso_rate, |
d310e405 | 3000 | lq_sta->active_mimo2_rate, |
3d44eebf ES |
3001 | lq_sta->is_vht, lq_sta->ldpc, lq_sta->stbc_capable, |
3002 | lq_sta->bfer_capable); | |
198266a3 ES |
3003 | IWL_DEBUG_RATE(mvm, "MAX RATE: LEGACY=%d SISO=%d MIMO2=%d\n", |
3004 | lq_sta->max_legacy_rate_idx, | |
3005 | lq_sta->max_siso_rate_idx, | |
3006 | lq_sta->max_mimo2_rate_idx); | |
8ca151b5 JB |
3007 | |
3008 | /* These values will be overridden later */ | |
3009 | lq_sta->lq.single_stream_ant_msk = | |
a0544272 | 3010 | first_antenna(iwl_mvm_get_valid_tx_ant(mvm)); |
809bccfa | 3011 | lq_sta->lq.dual_stream_ant_msk = ANT_AB; |
8ca151b5 JB |
3012 | |
3013 | /* as default allow aggregation for all tids */ | |
3014 | lq_sta->tx_agg_tid_en = IWL_AGG_ALL_TID; | |
8ca151b5 | 3015 | lq_sta->is_agg = 0; |
5fc0f76c | 3016 | #ifdef CONFIG_IWLWIFI_DEBUGFS |
2f15a829 | 3017 | iwl_mvm_reset_frame_stats(mvm); |
5fc0f76c | 3018 | #endif |
b87c2179 ES |
3019 | rs_initialize_lq(mvm, sta, lq_sta, band, init); |
3020 | } | |
3021 | ||
3022 | static void rs_rate_update(void *mvm_r, | |
3023 | struct ieee80211_supported_band *sband, | |
3024 | struct cfg80211_chan_def *chandef, | |
3025 | struct ieee80211_sta *sta, void *priv_sta, | |
3026 | u32 changed) | |
3027 | { | |
3028 | u8 tid; | |
3029 | struct iwl_op_mode *op_mode = | |
3030 | (struct iwl_op_mode *)mvm_r; | |
3031 | struct iwl_mvm *mvm = IWL_OP_MODE_GET_MVM(op_mode); | |
3032 | ||
dcbc17ad JB |
3033 | if (!iwl_mvm_sta_from_mac80211(sta)->vif) |
3034 | return; | |
3035 | ||
b87c2179 ES |
3036 | /* Stop any ongoing aggregations as rs starts off assuming no agg */ |
3037 | for (tid = 0; tid < IWL_MAX_TID_COUNT; tid++) | |
3038 | ieee80211_stop_tx_ba_session(sta, tid); | |
3039 | ||
3040 | iwl_mvm_rs_rate_init(mvm, sta, sband->band, false); | |
8ca151b5 JB |
3041 | } |
3042 | ||
8fc7c58c ES |
3043 | #ifdef CONFIG_MAC80211_DEBUGFS |
3044 | static void rs_build_rates_table_from_fixed(struct iwl_mvm *mvm, | |
3045 | struct iwl_lq_cmd *lq_cmd, | |
3046 | enum ieee80211_band band, | |
3047 | u32 ucode_rate) | |
3048 | { | |
3049 | struct rs_rate rate; | |
3050 | int i; | |
3051 | int num_rates = ARRAY_SIZE(lq_cmd->rs_table); | |
3052 | __le32 ucode_rate_le32 = cpu_to_le32(ucode_rate); | |
7ceb98a3 | 3053 | u8 ant = (ucode_rate & RATE_MCS_ANT_ABC_MSK) >> RATE_MCS_ANT_POS; |
8fc7c58c ES |
3054 | |
3055 | for (i = 0; i < num_rates; i++) | |
3056 | lq_cmd->rs_table[i] = ucode_rate_le32; | |
3057 | ||
3058 | rs_rate_from_ucode_rate(ucode_rate, band, &rate); | |
3059 | ||
3060 | if (is_mimo(&rate)) | |
3061 | lq_cmd->mimo_delim = num_rates - 1; | |
3062 | else | |
3063 | lq_cmd->mimo_delim = 0; | |
7ceb98a3 EG |
3064 | |
3065 | lq_cmd->reduced_tpc = 0; | |
3066 | ||
3067 | if (num_of_ant(ant) == 1) | |
3068 | lq_cmd->single_stream_ant_msk = ant; | |
3069 | ||
3070 | lq_cmd->agg_frame_cnt_limit = LINK_QUAL_AGG_FRAME_LIMIT_DEF; | |
8fc7c58c ES |
3071 | } |
3072 | #endif /* CONFIG_MAC80211_DEBUGFS */ | |
3073 | ||
e07be6d3 ES |
3074 | static void rs_fill_rates_for_column(struct iwl_mvm *mvm, |
3075 | struct iwl_lq_sta *lq_sta, | |
3076 | struct rs_rate *rate, | |
3077 | __le32 *rs_table, int *rs_table_index, | |
3078 | int num_rates, int num_retries, | |
3079 | u8 valid_tx_ant, bool toggle_ant) | |
3080 | { | |
3081 | int i, j; | |
3082 | __le32 ucode_rate; | |
3083 | bool bottom_reached = false; | |
3084 | int prev_rate_idx = rate->index; | |
3085 | int end = LINK_QUAL_MAX_RETRY_NUM; | |
3086 | int index = *rs_table_index; | |
3087 | ||
3088 | for (i = 0; i < num_rates && index < end; i++) { | |
bd999318 ES |
3089 | for (j = 0; j < num_retries && index < end; j++, index++) { |
3090 | ucode_rate = cpu_to_le32(ucode_rate_from_rs_rate(mvm, | |
3091 | rate)); | |
e07be6d3 | 3092 | rs_table[index] = ucode_rate; |
bd999318 ES |
3093 | if (toggle_ant) |
3094 | rs_toggle_antenna(valid_tx_ant, rate); | |
3095 | } | |
e07be6d3 ES |
3096 | |
3097 | prev_rate_idx = rate->index; | |
3098 | bottom_reached = rs_get_lower_rate_in_column(lq_sta, rate); | |
3099 | if (bottom_reached && !is_legacy(rate)) | |
3100 | break; | |
3101 | } | |
3102 | ||
bd999318 | 3103 | if (!bottom_reached && !is_legacy(rate)) |
e07be6d3 ES |
3104 | rate->index = prev_rate_idx; |
3105 | ||
3106 | *rs_table_index = index; | |
3107 | } | |
3108 | ||
3109 | /* Building the rate table is non trivial. When we're in MIMO2/VHT/80Mhz/SGI | |
3110 | * column the rate table should look like this: | |
3111 | * | |
3112 | * rate[0] 0x400D019 VHT | ANT: AB BW: 80Mhz MCS: 9 NSS: 2 SGI | |
3113 | * rate[1] 0x400D019 VHT | ANT: AB BW: 80Mhz MCS: 9 NSS: 2 SGI | |
3114 | * rate[2] 0x400D018 VHT | ANT: AB BW: 80Mhz MCS: 8 NSS: 2 SGI | |
3115 | * rate[3] 0x400D018 VHT | ANT: AB BW: 80Mhz MCS: 8 NSS: 2 SGI | |
3116 | * rate[4] 0x400D017 VHT | ANT: AB BW: 80Mhz MCS: 7 NSS: 2 SGI | |
3117 | * rate[5] 0x400D017 VHT | ANT: AB BW: 80Mhz MCS: 7 NSS: 2 SGI | |
3118 | * rate[6] 0x4005007 VHT | ANT: A BW: 80Mhz MCS: 7 NSS: 1 NGI | |
3119 | * rate[7] 0x4009006 VHT | ANT: B BW: 80Mhz MCS: 6 NSS: 1 NGI | |
3120 | * rate[8] 0x4005005 VHT | ANT: A BW: 80Mhz MCS: 5 NSS: 1 NGI | |
3121 | * rate[9] 0x800B Legacy | ANT: B Rate: 36 Mbps | |
3122 | * rate[10] 0x4009 Legacy | ANT: A Rate: 24 Mbps | |
3123 | * rate[11] 0x8007 Legacy | ANT: B Rate: 18 Mbps | |
3124 | * rate[12] 0x4005 Legacy | ANT: A Rate: 12 Mbps | |
3125 | * rate[13] 0x800F Legacy | ANT: B Rate: 9 Mbps | |
3126 | * rate[14] 0x400D Legacy | ANT: A Rate: 6 Mbps | |
3127 | * rate[15] 0x800D Legacy | ANT: B Rate: 6 Mbps | |
3128 | */ | |
8fc7c58c | 3129 | static void rs_build_rates_table(struct iwl_mvm *mvm, |
d8bafeaf | 3130 | struct ieee80211_sta *sta, |
8fc7c58c ES |
3131 | struct iwl_lq_sta *lq_sta, |
3132 | const struct rs_rate *initial_rate) | |
8ca151b5 | 3133 | { |
5aa33553 | 3134 | struct rs_rate rate; |
e07be6d3 | 3135 | int num_rates, num_retries, index = 0; |
8ca151b5 JB |
3136 | u8 valid_tx_ant = 0; |
3137 | struct iwl_lq_cmd *lq_cmd = &lq_sta->lq; | |
e07be6d3 | 3138 | bool toggle_ant = false; |
8ca151b5 | 3139 | |
9e898f1b | 3140 | memcpy(&rate, initial_rate, sizeof(rate)); |
8fc7c58c | 3141 | |
a0544272 | 3142 | valid_tx_ant = iwl_mvm_get_valid_tx_ant(mvm); |
c5d679a5 | 3143 | |
3d44eebf | 3144 | /* TODO: remove old API when min FW API hits 14 */ |
859d914c | 3145 | if (!fw_has_api(&mvm->fw->ucode_capa, IWL_UCODE_TLV_API_LQ_SS_PARAMS) && |
3d44eebf ES |
3146 | rs_stbc_allow(mvm, sta, lq_sta)) |
3147 | rate.stbc = true; | |
8ca151b5 | 3148 | |
e07be6d3 | 3149 | if (is_siso(&rate)) { |
834437da ES |
3150 | num_rates = IWL_MVM_RS_INITIAL_SISO_NUM_RATES; |
3151 | num_retries = IWL_MVM_RS_HT_VHT_RETRIES_PER_RATE; | |
e07be6d3 | 3152 | } else if (is_mimo(&rate)) { |
834437da ES |
3153 | num_rates = IWL_MVM_RS_INITIAL_MIMO_NUM_RATES; |
3154 | num_retries = IWL_MVM_RS_HT_VHT_RETRIES_PER_RATE; | |
8ca151b5 | 3155 | } else { |
834437da | 3156 | num_rates = IWL_MVM_RS_INITIAL_LEGACY_NUM_RATES; |
bd999318 | 3157 | num_retries = IWL_MVM_RS_INITIAL_LEGACY_RETRIES; |
e07be6d3 | 3158 | toggle_ant = true; |
8ca151b5 JB |
3159 | } |
3160 | ||
e07be6d3 ES |
3161 | rs_fill_rates_for_column(mvm, lq_sta, &rate, lq_cmd->rs_table, &index, |
3162 | num_rates, num_retries, valid_tx_ant, | |
3163 | toggle_ant); | |
8ca151b5 | 3164 | |
e07be6d3 | 3165 | rs_get_lower_rate_down_column(lq_sta, &rate); |
8ca151b5 | 3166 | |
e07be6d3 | 3167 | if (is_siso(&rate)) { |
834437da ES |
3168 | num_rates = IWL_MVM_RS_SECONDARY_SISO_NUM_RATES; |
3169 | num_retries = IWL_MVM_RS_SECONDARY_SISO_RETRIES; | |
d9088f60 | 3170 | lq_cmd->mimo_delim = index; |
e07be6d3 | 3171 | } else if (is_legacy(&rate)) { |
834437da | 3172 | num_rates = IWL_MVM_RS_SECONDARY_LEGACY_NUM_RATES; |
bd999318 | 3173 | num_retries = IWL_MVM_RS_SECONDARY_LEGACY_RETRIES; |
e07be6d3 ES |
3174 | } else { |
3175 | WARN_ON_ONCE(1); | |
3176 | } | |
8ca151b5 | 3177 | |
e07be6d3 | 3178 | toggle_ant = true; |
8ca151b5 | 3179 | |
e07be6d3 ES |
3180 | rs_fill_rates_for_column(mvm, lq_sta, &rate, lq_cmd->rs_table, &index, |
3181 | num_rates, num_retries, valid_tx_ant, | |
3182 | toggle_ant); | |
8ca151b5 | 3183 | |
e07be6d3 | 3184 | rs_get_lower_rate_down_column(lq_sta, &rate); |
8ca151b5 | 3185 | |
834437da | 3186 | num_rates = IWL_MVM_RS_SECONDARY_LEGACY_NUM_RATES; |
bd999318 | 3187 | num_retries = IWL_MVM_RS_SECONDARY_LEGACY_RETRIES; |
8ca151b5 | 3188 | |
e07be6d3 ES |
3189 | rs_fill_rates_for_column(mvm, lq_sta, &rate, lq_cmd->rs_table, &index, |
3190 | num_rates, num_retries, valid_tx_ant, | |
3191 | toggle_ant); | |
8ca151b5 | 3192 | |
8fc7c58c ES |
3193 | } |
3194 | ||
3d44eebf ES |
3195 | struct rs_bfer_active_iter_data { |
3196 | struct ieee80211_sta *exclude_sta; | |
3197 | struct iwl_mvm_sta *bfer_mvmsta; | |
3198 | }; | |
3199 | ||
3200 | static void rs_bfer_active_iter(void *_data, | |
3201 | struct ieee80211_sta *sta) | |
3202 | { | |
3203 | struct rs_bfer_active_iter_data *data = _data; | |
3204 | struct iwl_mvm_sta *mvmsta = iwl_mvm_sta_from_mac80211(sta); | |
3205 | struct iwl_lq_cmd *lq_cmd = &mvmsta->lq_sta.lq; | |
3206 | u32 ss_params = le32_to_cpu(lq_cmd->ss_params); | |
3207 | ||
3208 | if (sta == data->exclude_sta) | |
3209 | return; | |
3210 | ||
3211 | /* The current sta has BFER allowed */ | |
3212 | if (ss_params & LQ_SS_BFER_ALLOWED) { | |
3213 | WARN_ON_ONCE(data->bfer_mvmsta != NULL); | |
3214 | ||
3215 | data->bfer_mvmsta = mvmsta; | |
3216 | } | |
3217 | } | |
3218 | ||
3219 | static int rs_bfer_priority(struct iwl_mvm_sta *sta) | |
3220 | { | |
3221 | int prio = -1; | |
3222 | enum nl80211_iftype viftype = ieee80211_vif_type_p2p(sta->vif); | |
3223 | ||
3224 | switch (viftype) { | |
3225 | case NL80211_IFTYPE_AP: | |
3226 | case NL80211_IFTYPE_P2P_GO: | |
3227 | prio = 3; | |
3228 | break; | |
3229 | case NL80211_IFTYPE_P2P_CLIENT: | |
3230 | prio = 2; | |
3231 | break; | |
3232 | case NL80211_IFTYPE_STATION: | |
3233 | prio = 1; | |
3234 | break; | |
3235 | default: | |
3236 | WARN_ONCE(true, "viftype %d sta_id %d", viftype, sta->sta_id); | |
3237 | prio = -1; | |
3238 | } | |
3239 | ||
3240 | return prio; | |
3241 | } | |
3242 | ||
3243 | /* Returns >0 if sta1 has a higher BFER priority compared to sta2 */ | |
3244 | static int rs_bfer_priority_cmp(struct iwl_mvm_sta *sta1, | |
3245 | struct iwl_mvm_sta *sta2) | |
3246 | { | |
3247 | int prio1 = rs_bfer_priority(sta1); | |
3248 | int prio2 = rs_bfer_priority(sta2); | |
3249 | ||
3250 | if (prio1 > prio2) | |
3251 | return 1; | |
3252 | if (prio1 < prio2) | |
3253 | return -1; | |
3254 | return 0; | |
3255 | } | |
3256 | ||
3257 | static void rs_set_lq_ss_params(struct iwl_mvm *mvm, | |
3258 | struct ieee80211_sta *sta, | |
3259 | struct iwl_lq_sta *lq_sta, | |
3260 | const struct rs_rate *initial_rate) | |
3261 | { | |
3262 | struct iwl_lq_cmd *lq_cmd = &lq_sta->lq; | |
3263 | struct iwl_mvm_sta *mvmsta = iwl_mvm_sta_from_mac80211(sta); | |
3264 | struct rs_bfer_active_iter_data data = { | |
3265 | .exclude_sta = sta, | |
3266 | .bfer_mvmsta = NULL, | |
3267 | }; | |
3268 | struct iwl_mvm_sta *bfer_mvmsta = NULL; | |
3269 | u32 ss_params = LQ_SS_PARAMS_VALID; | |
3270 | ||
3271 | if (!iwl_mvm_bt_coex_is_mimo_allowed(mvm, sta)) | |
3272 | goto out; | |
3273 | ||
878985ce | 3274 | #ifdef CONFIG_MAC80211_DEBUGFS |
1e9c62fa ES |
3275 | /* Check if forcing the decision is configured. |
3276 | * Note that SISO is forced by not allowing STBC or BFER | |
3277 | */ | |
878985ce | 3278 | if (lq_sta->pers.ss_force == RS_SS_FORCE_STBC) |
1e9c62fa | 3279 | ss_params |= (LQ_SS_STBC_1SS_ALLOWED | LQ_SS_FORCE); |
878985ce | 3280 | else if (lq_sta->pers.ss_force == RS_SS_FORCE_BFER) |
1e9c62fa ES |
3281 | ss_params |= (LQ_SS_BFER_ALLOWED | LQ_SS_FORCE); |
3282 | ||
878985ce | 3283 | if (lq_sta->pers.ss_force != RS_SS_FORCE_NONE) { |
1e9c62fa | 3284 | IWL_DEBUG_RATE(mvm, "Forcing single stream Tx decision %d\n", |
878985ce | 3285 | lq_sta->pers.ss_force); |
1e9c62fa ES |
3286 | goto out; |
3287 | } | |
878985ce | 3288 | #endif |
1e9c62fa | 3289 | |
3d44eebf ES |
3290 | if (lq_sta->stbc_capable) |
3291 | ss_params |= LQ_SS_STBC_1SS_ALLOWED; | |
3292 | ||
3293 | if (!lq_sta->bfer_capable) | |
3294 | goto out; | |
3295 | ||
3296 | ieee80211_iterate_stations_atomic(mvm->hw, | |
3297 | rs_bfer_active_iter, | |
3298 | &data); | |
3299 | bfer_mvmsta = data.bfer_mvmsta; | |
3300 | ||
3301 | /* This code is safe as it doesn't run concurrently for different | |
3302 | * stations. This is guaranteed by the fact that calls to | |
3303 | * ieee80211_tx_status wouldn't run concurrently for a single HW. | |
3304 | */ | |
3305 | if (!bfer_mvmsta) { | |
3306 | IWL_DEBUG_RATE(mvm, "No sta with BFER allowed found. Allow\n"); | |
3307 | ||
3308 | ss_params |= LQ_SS_BFER_ALLOWED; | |
3309 | goto out; | |
3310 | } | |
3311 | ||
3312 | IWL_DEBUG_RATE(mvm, "Found existing sta %d with BFER activated\n", | |
3313 | bfer_mvmsta->sta_id); | |
3314 | ||
3315 | /* Disallow BFER on another STA if active and we're a higher priority */ | |
3316 | if (rs_bfer_priority_cmp(mvmsta, bfer_mvmsta) > 0) { | |
3317 | struct iwl_lq_cmd *bfersta_lq_cmd = &bfer_mvmsta->lq_sta.lq; | |
3318 | u32 bfersta_ss_params = le32_to_cpu(bfersta_lq_cmd->ss_params); | |
3319 | ||
3320 | bfersta_ss_params &= ~LQ_SS_BFER_ALLOWED; | |
3321 | bfersta_lq_cmd->ss_params = cpu_to_le32(bfersta_ss_params); | |
3322 | iwl_mvm_send_lq_cmd(mvm, bfersta_lq_cmd, false); | |
3323 | ||
3324 | ss_params |= LQ_SS_BFER_ALLOWED; | |
3325 | IWL_DEBUG_RATE(mvm, | |
3326 | "Lower priority BFER sta found (%d). Switch BFER\n", | |
3327 | bfer_mvmsta->sta_id); | |
3328 | } | |
3329 | out: | |
3330 | lq_cmd->ss_params = cpu_to_le32(ss_params); | |
3331 | } | |
3332 | ||
8fc7c58c ES |
3333 | static void rs_fill_lq_cmd(struct iwl_mvm *mvm, |
3334 | struct ieee80211_sta *sta, | |
3335 | struct iwl_lq_sta *lq_sta, | |
3336 | const struct rs_rate *initial_rate) | |
3337 | { | |
3338 | struct iwl_lq_cmd *lq_cmd = &lq_sta->lq; | |
7ceb98a3 EG |
3339 | struct iwl_mvm_sta *mvmsta; |
3340 | struct iwl_mvm_vif *mvmvif; | |
3341 | ||
834437da | 3342 | lq_cmd->agg_disable_start_th = IWL_MVM_RS_AGG_DISABLE_START; |
7ceb98a3 | 3343 | lq_cmd->agg_time_limit = |
834437da | 3344 | cpu_to_le16(IWL_MVM_RS_AGG_TIME_LIMIT); |
8fc7c58c ES |
3345 | |
3346 | #ifdef CONFIG_MAC80211_DEBUGFS | |
ae969afe | 3347 | if (lq_sta->pers.dbg_fixed_rate) { |
8fc7c58c ES |
3348 | rs_build_rates_table_from_fixed(mvm, lq_cmd, |
3349 | lq_sta->band, | |
ae969afe | 3350 | lq_sta->pers.dbg_fixed_rate); |
7ceb98a3 EG |
3351 | return; |
3352 | } | |
8fc7c58c | 3353 | #endif |
7ceb98a3 EG |
3354 | if (WARN_ON_ONCE(!sta || !initial_rate)) |
3355 | return; | |
8fc7c58c | 3356 | |
d8bafeaf | 3357 | rs_build_rates_table(mvm, sta, lq_sta, initial_rate); |
8ca151b5 | 3358 | |
859d914c | 3359 | if (fw_has_api(&mvm->fw->ucode_capa, IWL_UCODE_TLV_API_LQ_SS_PARAMS)) |
3d44eebf ES |
3360 | rs_set_lq_ss_params(mvm, sta, lq_sta, initial_rate); |
3361 | ||
7ceb98a3 EG |
3362 | mvmsta = iwl_mvm_sta_from_mac80211(sta); |
3363 | mvmvif = iwl_mvm_vif_from_mac80211(mvmsta->vif); | |
e96d551f | 3364 | |
7ceb98a3 EG |
3365 | if (num_of_ant(initial_rate->ant) == 1) |
3366 | lq_cmd->single_stream_ant_msk = initial_rate->ant; | |
3367 | ||
3368 | lq_cmd->agg_frame_cnt_limit = mvmsta->max_agg_bufsize; | |
3369 | ||
3370 | /* | |
0d365ae5 | 3371 | * In case of low latency, tell the firmware to leave a frame in the |
7ceb98a3 EG |
3372 | * Tx Fifo so that it can start a transaction in the same TxOP. This |
3373 | * basically allows the firmware to send bursts. | |
3374 | */ | |
9ecd051e | 3375 | if (iwl_mvm_vif_low_latency(mvmvif)) { |
7ceb98a3 EG |
3376 | lq_cmd->agg_frame_cnt_limit--; |
3377 | ||
9ecd051e ES |
3378 | if (mvm->low_latency_agg_frame_limit) |
3379 | lq_cmd->agg_frame_cnt_limit = | |
3380 | min(lq_cmd->agg_frame_cnt_limit, | |
3381 | mvm->low_latency_agg_frame_limit); | |
3382 | } | |
3383 | ||
a4db848f EG |
3384 | if (mvmsta->vif->p2p) |
3385 | lq_cmd->flags |= LQ_FLAG_USE_RTS_MSK; | |
3386 | ||
7ceb98a3 | 3387 | lq_cmd->agg_time_limit = |
5b7ff615 | 3388 | cpu_to_le16(iwl_mvm_coex_agg_time_limit(mvm, sta)); |
8ca151b5 JB |
3389 | } |
3390 | ||
3391 | static void *rs_alloc(struct ieee80211_hw *hw, struct dentry *debugfsdir) | |
3392 | { | |
3393 | return hw->priv; | |
3394 | } | |
3395 | /* rate scale requires free function to be implemented */ | |
3396 | static void rs_free(void *mvm_rate) | |
3397 | { | |
3398 | return; | |
3399 | } | |
3400 | ||
3401 | static void rs_free_sta(void *mvm_r, struct ieee80211_sta *sta, | |
3402 | void *mvm_sta) | |
3403 | { | |
3404 | struct iwl_op_mode *op_mode __maybe_unused = mvm_r; | |
3405 | struct iwl_mvm *mvm __maybe_unused = IWL_OP_MODE_GET_MVM(op_mode); | |
3406 | ||
3407 | IWL_DEBUG_RATE(mvm, "enter\n"); | |
3408 | IWL_DEBUG_RATE(mvm, "leave\n"); | |
3409 | } | |
3410 | ||
3411 | #ifdef CONFIG_MAC80211_DEBUGFS | |
5fc0f76c | 3412 | int rs_pretty_print_rate(char *buf, const u32 rate) |
5aa33553 ES |
3413 | { |
3414 | ||
1a61b347 ES |
3415 | char *type, *bw; |
3416 | u8 mcs = 0, nss = 0; | |
3417 | u8 ant = (rate & RATE_MCS_ANT_ABC_MSK) >> RATE_MCS_ANT_POS; | |
3418 | ||
3419 | if (!(rate & RATE_MCS_HT_MSK) && | |
3420 | !(rate & RATE_MCS_VHT_MSK)) { | |
3421 | int index = iwl_hwrate_to_plcp_idx(rate); | |
3422 | ||
3423 | return sprintf(buf, "Legacy | ANT: %s Rate: %s Mbps\n", | |
560843f4 ES |
3424 | rs_pretty_ant(ant), |
3425 | index == IWL_RATE_INVALID ? "BAD" : | |
3426 | iwl_rate_mcs[index].mbps); | |
1a61b347 ES |
3427 | } |
3428 | ||
3429 | if (rate & RATE_MCS_VHT_MSK) { | |
3430 | type = "VHT"; | |
3431 | mcs = rate & RATE_VHT_MCS_RATE_CODE_MSK; | |
3432 | nss = ((rate & RATE_VHT_MCS_NSS_MSK) | |
3433 | >> RATE_VHT_MCS_NSS_POS) + 1; | |
3434 | } else if (rate & RATE_MCS_HT_MSK) { | |
3435 | type = "HT"; | |
3436 | mcs = rate & RATE_HT_MCS_INDEX_MSK; | |
3437 | } else { | |
3438 | type = "Unknown"; /* shouldn't happen */ | |
3439 | } | |
3440 | ||
3441 | switch (rate & RATE_MCS_CHAN_WIDTH_MSK) { | |
3442 | case RATE_MCS_CHAN_WIDTH_20: | |
3443 | bw = "20Mhz"; | |
3444 | break; | |
3445 | case RATE_MCS_CHAN_WIDTH_40: | |
3446 | bw = "40Mhz"; | |
3447 | break; | |
3448 | case RATE_MCS_CHAN_WIDTH_80: | |
3449 | bw = "80Mhz"; | |
3450 | break; | |
3451 | case RATE_MCS_CHAN_WIDTH_160: | |
3452 | bw = "160Mhz"; | |
3453 | break; | |
3454 | default: | |
3455 | bw = "BAD BW"; | |
3456 | } | |
3457 | ||
3458 | return sprintf(buf, "%s | ANT: %s BW: %s MCS: %d NSS: %d %s%s%s%s%s\n", | |
5aa33553 | 3459 | type, rs_pretty_ant(ant), bw, mcs, nss, |
1a61b347 | 3460 | (rate & RATE_MCS_SGI_MSK) ? "SGI " : "NGI ", |
7b1dd048 | 3461 | (rate & RATE_MCS_HT_STBC_MSK) ? "STBC " : "", |
1a61b347 ES |
3462 | (rate & RATE_MCS_LDPC_MSK) ? "LDPC " : "", |
3463 | (rate & RATE_MCS_BF_MSK) ? "BF " : "", | |
3464 | (rate & RATE_MCS_ZLF_MSK) ? "ZLF " : ""); | |
3465 | } | |
3466 | ||
a0c38b21 ES |
3467 | /** |
3468 | * Program the device to use fixed rate for frame transmit | |
3469 | * This is for debugging/testing only | |
3470 | * once the device start use fixed rate, we need to reload the module | |
3471 | * to being back the normal operation. | |
3472 | */ | |
3473 | static void rs_program_fix_rate(struct iwl_mvm *mvm, | |
3474 | struct iwl_lq_sta *lq_sta) | |
3475 | { | |
3476 | lq_sta->active_legacy_rate = 0x0FFF; /* 1 - 54 MBits, includes CCK */ | |
3477 | lq_sta->active_siso_rate = 0x1FD0; /* 6 - 60 MBits, no 9, no CCK */ | |
3478 | lq_sta->active_mimo2_rate = 0x1FD0; /* 6 - 60 MBits, no 9, no CCK */ | |
3479 | ||
3480 | IWL_DEBUG_RATE(mvm, "sta_id %d rate 0x%X\n", | |
ae969afe | 3481 | lq_sta->lq.sta_id, lq_sta->pers.dbg_fixed_rate); |
a0c38b21 | 3482 | |
ae969afe | 3483 | if (lq_sta->pers.dbg_fixed_rate) { |
7ceb98a3 | 3484 | rs_fill_lq_cmd(mvm, NULL, lq_sta, NULL); |
ae969afe | 3485 | iwl_mvm_send_lq_cmd(lq_sta->pers.drv, &lq_sta->lq, false); |
a0c38b21 ES |
3486 | } |
3487 | } | |
3488 | ||
9d10849e EG |
3489 | static ssize_t rs_sta_dbgfs_scale_table_write(struct file *file, |
3490 | const char __user *user_buf, size_t count, loff_t *ppos) | |
3491 | { | |
3492 | struct iwl_lq_sta *lq_sta = file->private_data; | |
3493 | struct iwl_mvm *mvm; | |
3494 | char buf[64]; | |
3495 | size_t buf_size; | |
3496 | u32 parsed_rate; | |
3497 | ||
ae969afe | 3498 | mvm = lq_sta->pers.drv; |
9d10849e EG |
3499 | memset(buf, 0, sizeof(buf)); |
3500 | buf_size = min(count, sizeof(buf) - 1); | |
3501 | if (copy_from_user(buf, user_buf, buf_size)) | |
3502 | return -EFAULT; | |
3503 | ||
3504 | if (sscanf(buf, "%x", &parsed_rate) == 1) | |
ae969afe | 3505 | lq_sta->pers.dbg_fixed_rate = parsed_rate; |
9d10849e | 3506 | else |
ae969afe | 3507 | lq_sta->pers.dbg_fixed_rate = 0; |
9d10849e EG |
3508 | |
3509 | rs_program_fix_rate(mvm, lq_sta); | |
3510 | ||
3511 | return count; | |
3512 | } | |
3513 | ||
8ca151b5 JB |
3514 | static ssize_t rs_sta_dbgfs_scale_table_read(struct file *file, |
3515 | char __user *user_buf, size_t count, loff_t *ppos) | |
3516 | { | |
3517 | char *buff; | |
3518 | int desc = 0; | |
3519 | int i = 0; | |
8ca151b5 JB |
3520 | ssize_t ret; |
3521 | ||
3522 | struct iwl_lq_sta *lq_sta = file->private_data; | |
3523 | struct iwl_mvm *mvm; | |
3524 | struct iwl_scale_tbl_info *tbl = &(lq_sta->lq_info[lq_sta->active_tbl]); | |
5aa33553 | 3525 | struct rs_rate *rate = &tbl->rate; |
16c426ff | 3526 | u32 ss_params; |
ae969afe | 3527 | mvm = lq_sta->pers.drv; |
1a61b347 | 3528 | buff = kmalloc(2048, GFP_KERNEL); |
8ca151b5 JB |
3529 | if (!buff) |
3530 | return -ENOMEM; | |
3531 | ||
3532 | desc += sprintf(buff+desc, "sta_id %d\n", lq_sta->lq.sta_id); | |
198266a3 | 3533 | desc += sprintf(buff+desc, "failed=%d success=%d rate=0%lX\n", |
8ca151b5 JB |
3534 | lq_sta->total_failed, lq_sta->total_success, |
3535 | lq_sta->active_legacy_rate); | |
3536 | desc += sprintf(buff+desc, "fixed rate 0x%X\n", | |
ae969afe | 3537 | lq_sta->pers.dbg_fixed_rate); |
8ca151b5 | 3538 | desc += sprintf(buff+desc, "valid_tx_ant %s%s%s\n", |
a0544272 MH |
3539 | (iwl_mvm_get_valid_tx_ant(mvm) & ANT_A) ? "ANT_A," : "", |
3540 | (iwl_mvm_get_valid_tx_ant(mvm) & ANT_B) ? "ANT_B," : "", | |
3541 | (iwl_mvm_get_valid_tx_ant(mvm) & ANT_C) ? "ANT_C" : ""); | |
8ca151b5 | 3542 | desc += sprintf(buff+desc, "lq type %s\n", |
5aa33553 ES |
3543 | (is_legacy(rate)) ? "legacy" : |
3544 | is_vht(rate) ? "VHT" : "HT"); | |
3545 | if (!is_legacy(rate)) { | |
e70fe7eb | 3546 | desc += sprintf(buff + desc, " %s", |
5aa33553 | 3547 | (is_siso(rate)) ? "SISO" : "MIMO2"); |
e70fe7eb EG |
3548 | desc += sprintf(buff + desc, " %s", |
3549 | (is_ht20(rate)) ? "20MHz" : | |
3550 | (is_ht40(rate)) ? "40MHz" : | |
3551 | (is_ht80(rate)) ? "80Mhz" : "BAD BW"); | |
3552 | desc += sprintf(buff + desc, " %s %s %s\n", | |
3553 | (rate->sgi) ? "SGI" : "NGI", | |
3554 | (rate->ldpc) ? "LDPC" : "BCC", | |
3555 | (lq_sta->is_agg) ? "AGG on" : ""); | |
8ca151b5 JB |
3556 | } |
3557 | desc += sprintf(buff+desc, "last tx rate=0x%X\n", | |
3558 | lq_sta->last_rate_n_flags); | |
3559 | desc += sprintf(buff+desc, | |
1a61b347 | 3560 | "general: flags=0x%X mimo-d=%d s-ant=0x%x d-ant=0x%x\n", |
8ca151b5 JB |
3561 | lq_sta->lq.flags, |
3562 | lq_sta->lq.mimo_delim, | |
3563 | lq_sta->lq.single_stream_ant_msk, | |
3564 | lq_sta->lq.dual_stream_ant_msk); | |
3565 | ||
3566 | desc += sprintf(buff+desc, | |
3567 | "agg: time_limit=%d dist_start_th=%d frame_cnt_limit=%d\n", | |
3568 | le16_to_cpu(lq_sta->lq.agg_time_limit), | |
3569 | lq_sta->lq.agg_disable_start_th, | |
3570 | lq_sta->lq.agg_frame_cnt_limit); | |
3571 | ||
2fd647f8 | 3572 | desc += sprintf(buff+desc, "reduced tpc=%d\n", lq_sta->lq.reduced_tpc); |
16c426ff ES |
3573 | ss_params = le32_to_cpu(lq_sta->lq.ss_params); |
3574 | desc += sprintf(buff+desc, "single stream params: %s%s%s%s\n", | |
3575 | (ss_params & LQ_SS_PARAMS_VALID) ? | |
db7c689d | 3576 | "VALID" : "INVALID", |
16c426ff | 3577 | (ss_params & LQ_SS_BFER_ALLOWED) ? |
db7c689d | 3578 | ", BFER" : "", |
16c426ff | 3579 | (ss_params & LQ_SS_STBC_1SS_ALLOWED) ? |
db7c689d | 3580 | ", STBC" : "", |
16c426ff | 3581 | (ss_params & LQ_SS_FORCE) ? |
db7c689d | 3582 | ", FORCE" : ""); |
8ca151b5 JB |
3583 | desc += sprintf(buff+desc, |
3584 | "Start idx [0]=0x%x [1]=0x%x [2]=0x%x [3]=0x%x\n", | |
3585 | lq_sta->lq.initial_rate_index[0], | |
3586 | lq_sta->lq.initial_rate_index[1], | |
3587 | lq_sta->lq.initial_rate_index[2], | |
3588 | lq_sta->lq.initial_rate_index[3]); | |
3589 | ||
3590 | for (i = 0; i < LINK_QUAL_MAX_RETRY_NUM; i++) { | |
cf4ef654 | 3591 | u32 r = le32_to_cpu(lq_sta->lq.rs_table[i]); |
1a61b347 | 3592 | |
cf4ef654 JB |
3593 | desc += sprintf(buff+desc, " rate[%d] 0x%X ", i, r); |
3594 | desc += rs_pretty_print_rate(buff+desc, r); | |
8ca151b5 JB |
3595 | } |
3596 | ||
3597 | ret = simple_read_from_buffer(user_buf, count, ppos, buff, desc); | |
3598 | kfree(buff); | |
3599 | return ret; | |
3600 | } | |
3601 | ||
3602 | static const struct file_operations rs_sta_dbgfs_scale_table_ops = { | |
3603 | .write = rs_sta_dbgfs_scale_table_write, | |
3604 | .read = rs_sta_dbgfs_scale_table_read, | |
3605 | .open = simple_open, | |
3606 | .llseek = default_llseek, | |
3607 | }; | |
3608 | static ssize_t rs_sta_dbgfs_stats_table_read(struct file *file, | |
3609 | char __user *user_buf, size_t count, loff_t *ppos) | |
3610 | { | |
3611 | char *buff; | |
3612 | int desc = 0; | |
3613 | int i, j; | |
3614 | ssize_t ret; | |
d310e405 | 3615 | struct iwl_scale_tbl_info *tbl; |
5aa33553 | 3616 | struct rs_rate *rate; |
8ca151b5 JB |
3617 | struct iwl_lq_sta *lq_sta = file->private_data; |
3618 | ||
3619 | buff = kmalloc(1024, GFP_KERNEL); | |
3620 | if (!buff) | |
3621 | return -ENOMEM; | |
3622 | ||
3623 | for (i = 0; i < LQ_SIZE; i++) { | |
d310e405 | 3624 | tbl = &(lq_sta->lq_info[i]); |
5aa33553 | 3625 | rate = &tbl->rate; |
8ca151b5 | 3626 | desc += sprintf(buff+desc, |
6a524f48 | 3627 | "%s type=%d SGI=%d BW=%s DUP=0\n" |
8fc7c58c | 3628 | "index=%d\n", |
8ca151b5 | 3629 | lq_sta->active_tbl == i ? "*" : "x", |
5aa33553 ES |
3630 | rate->type, |
3631 | rate->sgi, | |
3632 | is_ht20(rate) ? "20Mhz" : | |
3633 | is_ht40(rate) ? "40Mhz" : | |
3634 | is_ht80(rate) ? "80Mhz" : "ERR", | |
8fc7c58c | 3635 | rate->index); |
8ca151b5 JB |
3636 | for (j = 0; j < IWL_RATE_COUNT; j++) { |
3637 | desc += sprintf(buff+desc, | |
3638 | "counter=%d success=%d %%=%d\n", | |
d310e405 ES |
3639 | tbl->win[j].counter, |
3640 | tbl->win[j].success_counter, | |
3641 | tbl->win[j].success_ratio); | |
8ca151b5 JB |
3642 | } |
3643 | } | |
3644 | ret = simple_read_from_buffer(user_buf, count, ppos, buff, desc); | |
3645 | kfree(buff); | |
3646 | return ret; | |
3647 | } | |
3648 | ||
3649 | static const struct file_operations rs_sta_dbgfs_stats_table_ops = { | |
3650 | .read = rs_sta_dbgfs_stats_table_read, | |
3651 | .open = simple_open, | |
3652 | .llseek = default_llseek, | |
3653 | }; | |
3654 | ||
757cf23b ES |
3655 | static ssize_t rs_sta_dbgfs_drv_tx_stats_read(struct file *file, |
3656 | char __user *user_buf, | |
3657 | size_t count, loff_t *ppos) | |
3658 | { | |
3659 | static const char * const column_name[] = { | |
3660 | [RS_COLUMN_LEGACY_ANT_A] = "LEGACY_ANT_A", | |
3661 | [RS_COLUMN_LEGACY_ANT_B] = "LEGACY_ANT_B", | |
3662 | [RS_COLUMN_SISO_ANT_A] = "SISO_ANT_A", | |
3663 | [RS_COLUMN_SISO_ANT_B] = "SISO_ANT_B", | |
3664 | [RS_COLUMN_SISO_ANT_A_SGI] = "SISO_ANT_A_SGI", | |
3665 | [RS_COLUMN_SISO_ANT_B_SGI] = "SISO_ANT_B_SGI", | |
3666 | [RS_COLUMN_MIMO2] = "MIMO2", | |
3667 | [RS_COLUMN_MIMO2_SGI] = "MIMO2_SGI", | |
3668 | }; | |
3669 | ||
3670 | static const char * const rate_name[] = { | |
3671 | [IWL_RATE_1M_INDEX] = "1M", | |
3672 | [IWL_RATE_2M_INDEX] = "2M", | |
3673 | [IWL_RATE_5M_INDEX] = "5.5M", | |
3674 | [IWL_RATE_11M_INDEX] = "11M", | |
3675 | [IWL_RATE_6M_INDEX] = "6M|MCS0", | |
3676 | [IWL_RATE_9M_INDEX] = "9M", | |
3677 | [IWL_RATE_12M_INDEX] = "12M|MCS1", | |
3678 | [IWL_RATE_18M_INDEX] = "18M|MCS2", | |
3679 | [IWL_RATE_24M_INDEX] = "24M|MCS3", | |
3680 | [IWL_RATE_36M_INDEX] = "36M|MCS4", | |
3681 | [IWL_RATE_48M_INDEX] = "48M|MCS5", | |
3682 | [IWL_RATE_54M_INDEX] = "54M|MCS6", | |
3683 | [IWL_RATE_MCS_7_INDEX] = "MCS7", | |
3684 | [IWL_RATE_MCS_8_INDEX] = "MCS8", | |
3685 | [IWL_RATE_MCS_9_INDEX] = "MCS9", | |
3686 | }; | |
3687 | ||
3688 | char *buff, *pos, *endpos; | |
3689 | int col, rate; | |
3690 | ssize_t ret; | |
3691 | struct iwl_lq_sta *lq_sta = file->private_data; | |
3692 | struct rs_rate_stats *stats; | |
3693 | static const size_t bufsz = 1024; | |
3694 | ||
3695 | buff = kmalloc(bufsz, GFP_KERNEL); | |
3696 | if (!buff) | |
3697 | return -ENOMEM; | |
3698 | ||
3699 | pos = buff; | |
3700 | endpos = pos + bufsz; | |
3701 | ||
3702 | pos += scnprintf(pos, endpos - pos, "COLUMN,"); | |
3703 | for (rate = 0; rate < IWL_RATE_COUNT; rate++) | |
3704 | pos += scnprintf(pos, endpos - pos, "%s,", rate_name[rate]); | |
3705 | pos += scnprintf(pos, endpos - pos, "\n"); | |
3706 | ||
3707 | for (col = 0; col < RS_COLUMN_COUNT; col++) { | |
3708 | pos += scnprintf(pos, endpos - pos, | |
3709 | "%s,", column_name[col]); | |
3710 | ||
3711 | for (rate = 0; rate < IWL_RATE_COUNT; rate++) { | |
f58220f6 | 3712 | stats = &(lq_sta->pers.tx_stats[col][rate]); |
757cf23b ES |
3713 | pos += scnprintf(pos, endpos - pos, |
3714 | "%llu/%llu,", | |
3715 | stats->success, | |
3716 | stats->total); | |
3717 | } | |
3718 | pos += scnprintf(pos, endpos - pos, "\n"); | |
3719 | } | |
3720 | ||
3721 | ret = simple_read_from_buffer(user_buf, count, ppos, buff, pos - buff); | |
3722 | kfree(buff); | |
3723 | return ret; | |
3724 | } | |
3725 | ||
3726 | static ssize_t rs_sta_dbgfs_drv_tx_stats_write(struct file *file, | |
3727 | const char __user *user_buf, | |
3728 | size_t count, loff_t *ppos) | |
3729 | { | |
3730 | struct iwl_lq_sta *lq_sta = file->private_data; | |
f58220f6 | 3731 | memset(lq_sta->pers.tx_stats, 0, sizeof(lq_sta->pers.tx_stats)); |
757cf23b ES |
3732 | |
3733 | return count; | |
3734 | } | |
3735 | ||
3736 | static const struct file_operations rs_sta_dbgfs_drv_tx_stats_ops = { | |
3737 | .read = rs_sta_dbgfs_drv_tx_stats_read, | |
3738 | .write = rs_sta_dbgfs_drv_tx_stats_write, | |
3739 | .open = simple_open, | |
3740 | .llseek = default_llseek, | |
3741 | }; | |
3742 | ||
1e9c62fa ES |
3743 | static ssize_t iwl_dbgfs_ss_force_read(struct file *file, |
3744 | char __user *user_buf, | |
3745 | size_t count, loff_t *ppos) | |
3746 | { | |
3747 | struct iwl_lq_sta *lq_sta = file->private_data; | |
3748 | char buf[12]; | |
3749 | int bufsz = sizeof(buf); | |
3750 | int pos = 0; | |
3751 | static const char * const ss_force_name[] = { | |
3752 | [RS_SS_FORCE_NONE] = "none", | |
3753 | [RS_SS_FORCE_STBC] = "stbc", | |
3754 | [RS_SS_FORCE_BFER] = "bfer", | |
3755 | [RS_SS_FORCE_SISO] = "siso", | |
3756 | }; | |
3757 | ||
3758 | pos += scnprintf(buf+pos, bufsz-pos, "%s\n", | |
878985ce | 3759 | ss_force_name[lq_sta->pers.ss_force]); |
1e9c62fa ES |
3760 | return simple_read_from_buffer(user_buf, count, ppos, buf, pos); |
3761 | } | |
3762 | ||
3763 | static ssize_t iwl_dbgfs_ss_force_write(struct iwl_lq_sta *lq_sta, char *buf, | |
3764 | size_t count, loff_t *ppos) | |
3765 | { | |
3766 | struct iwl_mvm *mvm = lq_sta->pers.drv; | |
3767 | int ret = 0; | |
3768 | ||
3769 | if (!strncmp("none", buf, 4)) { | |
878985ce | 3770 | lq_sta->pers.ss_force = RS_SS_FORCE_NONE; |
1e9c62fa | 3771 | } else if (!strncmp("siso", buf, 4)) { |
878985ce | 3772 | lq_sta->pers.ss_force = RS_SS_FORCE_SISO; |
1e9c62fa ES |
3773 | } else if (!strncmp("stbc", buf, 4)) { |
3774 | if (lq_sta->stbc_capable) { | |
878985ce | 3775 | lq_sta->pers.ss_force = RS_SS_FORCE_STBC; |
1e9c62fa ES |
3776 | } else { |
3777 | IWL_ERR(mvm, | |
3778 | "can't force STBC. peer doesn't support\n"); | |
3779 | ret = -EINVAL; | |
3780 | } | |
3781 | } else if (!strncmp("bfer", buf, 4)) { | |
3782 | if (lq_sta->bfer_capable) { | |
878985ce | 3783 | lq_sta->pers.ss_force = RS_SS_FORCE_BFER; |
1e9c62fa ES |
3784 | } else { |
3785 | IWL_ERR(mvm, | |
3786 | "can't force BFER. peer doesn't support\n"); | |
3787 | ret = -EINVAL; | |
3788 | } | |
3789 | } else { | |
3790 | IWL_ERR(mvm, "valid values none|siso|stbc|bfer\n"); | |
3791 | ret = -EINVAL; | |
3792 | } | |
3793 | return ret ?: count; | |
3794 | } | |
3795 | ||
3796 | #define MVM_DEBUGFS_READ_WRITE_FILE_OPS(name, bufsz) \ | |
3797 | _MVM_DEBUGFS_READ_WRITE_FILE_OPS(name, bufsz, struct iwl_lq_sta) | |
3798 | #define MVM_DEBUGFS_ADD_FILE_RS(name, parent, mode) do { \ | |
3799 | if (!debugfs_create_file(#name, mode, parent, lq_sta, \ | |
3800 | &iwl_dbgfs_##name##_ops)) \ | |
3801 | goto err; \ | |
3802 | } while (0) | |
3803 | ||
3804 | MVM_DEBUGFS_READ_WRITE_FILE_OPS(ss_force, 32); | |
3805 | ||
dcbc17ad | 3806 | static void rs_add_debugfs(void *mvm, void *priv_sta, struct dentry *dir) |
8ca151b5 | 3807 | { |
dcbc17ad JB |
3808 | struct iwl_lq_sta *lq_sta = priv_sta; |
3809 | struct iwl_mvm_sta *mvmsta; | |
3810 | ||
3811 | mvmsta = container_of(lq_sta, struct iwl_mvm_sta, lq_sta); | |
3812 | ||
3813 | if (!mvmsta->vif) | |
3814 | return; | |
1e9c62fa | 3815 | |
c6e1faad EP |
3816 | debugfs_create_file("rate_scale_table", S_IRUSR | S_IWUSR, dir, |
3817 | lq_sta, &rs_sta_dbgfs_scale_table_ops); | |
3818 | debugfs_create_file("rate_stats_table", S_IRUSR, dir, | |
3819 | lq_sta, &rs_sta_dbgfs_stats_table_ops); | |
3820 | debugfs_create_file("drv_tx_stats", S_IRUSR | S_IWUSR, dir, | |
3821 | lq_sta, &rs_sta_dbgfs_drv_tx_stats_ops); | |
3822 | debugfs_create_u8("tx_agg_tid_enable", S_IRUSR | S_IWUSR, dir, | |
3823 | &lq_sta->tx_agg_tid_en); | |
3824 | debugfs_create_u8("reduced_tpc", S_IRUSR | S_IWUSR, dir, | |
3825 | &lq_sta->pers.dbg_fixed_txp_reduction); | |
1e9c62fa ES |
3826 | |
3827 | MVM_DEBUGFS_ADD_FILE_RS(ss_force, dir, S_IRUSR | S_IWUSR); | |
3828 | return; | |
3829 | err: | |
3830 | IWL_ERR((struct iwl_mvm *)mvm, "Can't create debugfs entity\n"); | |
8ca151b5 JB |
3831 | } |
3832 | ||
3833 | static void rs_remove_debugfs(void *mvm, void *mvm_sta) | |
3834 | { | |
8ca151b5 JB |
3835 | } |
3836 | #endif | |
3837 | ||
3838 | /* | |
3839 | * Initialization of rate scaling information is done by driver after | |
3840 | * the station is added. Since mac80211 calls this function before a | |
3841 | * station is added we ignore it. | |
3842 | */ | |
3843 | static void rs_rate_init_stub(void *mvm_r, | |
3de805cf SW |
3844 | struct ieee80211_supported_band *sband, |
3845 | struct cfg80211_chan_def *chandef, | |
3846 | struct ieee80211_sta *sta, void *mvm_sta) | |
8ca151b5 JB |
3847 | { |
3848 | } | |
631ad703 JB |
3849 | |
3850 | static const struct rate_control_ops rs_mvm_ops = { | |
8ca151b5 | 3851 | .name = RS_NAME, |
1ebc8f2e | 3852 | .tx_status = rs_mac80211_tx_status, |
8ca151b5 JB |
3853 | .get_rate = rs_get_rate, |
3854 | .rate_init = rs_rate_init_stub, | |
3855 | .alloc = rs_alloc, | |
3856 | .free = rs_free, | |
3857 | .alloc_sta = rs_alloc_sta, | |
3858 | .free_sta = rs_free_sta, | |
b87c2179 | 3859 | .rate_update = rs_rate_update, |
8ca151b5 JB |
3860 | #ifdef CONFIG_MAC80211_DEBUGFS |
3861 | .add_sta_debugfs = rs_add_debugfs, | |
3862 | .remove_sta_debugfs = rs_remove_debugfs, | |
3863 | #endif | |
3864 | }; | |
3865 | ||
3866 | int iwl_mvm_rate_control_register(void) | |
3867 | { | |
3868 | return ieee80211_rate_control_register(&rs_mvm_ops); | |
3869 | } | |
3870 | ||
3871 | void iwl_mvm_rate_control_unregister(void) | |
3872 | { | |
3873 | ieee80211_rate_control_unregister(&rs_mvm_ops); | |
3874 | } | |
9ee718aa EL |
3875 | |
3876 | /** | |
3877 | * iwl_mvm_tx_protection - Gets LQ command, change it to enable/disable | |
0d365ae5 | 3878 | * Tx protection, according to this request and previous requests, |
9ee718aa | 3879 | * and send the LQ command. |
9ee718aa EL |
3880 | * @mvmsta: The station |
3881 | * @enable: Enable Tx protection? | |
3882 | */ | |
e126b5d9 JB |
3883 | int iwl_mvm_tx_protection(struct iwl_mvm *mvm, struct iwl_mvm_sta *mvmsta, |
3884 | bool enable) | |
9ee718aa | 3885 | { |
e126b5d9 JB |
3886 | struct iwl_lq_cmd *lq = &mvmsta->lq_sta.lq; |
3887 | ||
9ee718aa EL |
3888 | lockdep_assert_held(&mvm->mutex); |
3889 | ||
3890 | if (enable) { | |
3891 | if (mvmsta->tx_protection == 0) | |
d307ec8d | 3892 | lq->flags |= LQ_FLAG_USE_RTS_MSK; |
9ee718aa EL |
3893 | mvmsta->tx_protection++; |
3894 | } else { | |
3895 | mvmsta->tx_protection--; | |
3896 | if (mvmsta->tx_protection == 0) | |
d307ec8d | 3897 | lq->flags &= ~LQ_FLAG_USE_RTS_MSK; |
9ee718aa EL |
3898 | } |
3899 | ||
9e680946 | 3900 | return iwl_mvm_send_lq_cmd(mvm, lq, false); |
9ee718aa | 3901 | } |