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14#include <linux/kernel.h>
15#include <linux/skbuff.h>
16#include <linux/slab.h>
17#include <net/mac80211.h>
18
19#include <linux/netdevice.h>
20#include <linux/etherdevice.h>
21#include <linux/delay.h>
22
23#include <linux/workqueue.h>
24#include "rs.h"
25#include "fw-api.h"
26#include "sta.h"
27#include "iwl-op-mode.h"
28#include "mvm.h"
29#include "debugfs.h"
30
31#define IWL_RATE_MAX_WINDOW 62
32
33
34
35
36#define RS_PERCENT(x) (128 * x)
37
38static u8 rs_ht_to_legacy[] = {
39 [IWL_RATE_MCS_0_INDEX] = IWL_RATE_6M_INDEX,
40 [IWL_RATE_MCS_1_INDEX] = IWL_RATE_9M_INDEX,
41 [IWL_RATE_MCS_2_INDEX] = IWL_RATE_12M_INDEX,
42 [IWL_RATE_MCS_3_INDEX] = IWL_RATE_18M_INDEX,
43 [IWL_RATE_MCS_4_INDEX] = IWL_RATE_24M_INDEX,
44 [IWL_RATE_MCS_5_INDEX] = IWL_RATE_36M_INDEX,
45 [IWL_RATE_MCS_6_INDEX] = IWL_RATE_48M_INDEX,
46 [IWL_RATE_MCS_7_INDEX] = IWL_RATE_54M_INDEX,
47 [IWL_RATE_MCS_8_INDEX] = IWL_RATE_54M_INDEX,
48 [IWL_RATE_MCS_9_INDEX] = IWL_RATE_54M_INDEX,
49};
50
51static const u8 ant_toggle_lookup[] = {
52 [ANT_NONE] = ANT_NONE,
53 [ANT_A] = ANT_B,
54 [ANT_B] = ANT_A,
55 [ANT_AB] = ANT_AB,
56};
57
58#define IWL_DECLARE_RATE_INFO(r, s, rp, rn) \
59 [IWL_RATE_##r##M_INDEX] = { IWL_RATE_##r##M_PLCP, \
60 IWL_RATE_HT_SISO_MCS_##s##_PLCP, \
61 IWL_RATE_HT_MIMO2_MCS_##s##_PLCP, \
62 IWL_RATE_VHT_SISO_MCS_##s##_PLCP, \
63 IWL_RATE_VHT_MIMO2_MCS_##s##_PLCP,\
64 IWL_RATE_##rp##M_INDEX, \
65 IWL_RATE_##rn##M_INDEX }
66
67#define IWL_DECLARE_MCS_RATE(s) \
68 [IWL_RATE_MCS_##s##_INDEX] = { IWL_RATE_INVM_PLCP, \
69 IWL_RATE_HT_SISO_MCS_##s##_PLCP, \
70 IWL_RATE_HT_MIMO2_MCS_##s##_PLCP, \
71 IWL_RATE_VHT_SISO_MCS_##s##_PLCP, \
72 IWL_RATE_VHT_MIMO2_MCS_##s##_PLCP, \
73 IWL_RATE_INVM_INDEX, \
74 IWL_RATE_INVM_INDEX }
75
76
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82
83
84static const struct iwl_rs_rate_info iwl_rates[IWL_RATE_COUNT] = {
85 IWL_DECLARE_RATE_INFO(1, INV, INV, 2),
86 IWL_DECLARE_RATE_INFO(2, INV, 1, 5),
87 IWL_DECLARE_RATE_INFO(5, INV, 2, 11),
88 IWL_DECLARE_RATE_INFO(11, INV, 9, 12),
89 IWL_DECLARE_RATE_INFO(6, 0, 5, 11),
90 IWL_DECLARE_RATE_INFO(9, INV, 6, 11),
91 IWL_DECLARE_RATE_INFO(12, 1, 11, 18),
92 IWL_DECLARE_RATE_INFO(18, 2, 12, 24),
93 IWL_DECLARE_RATE_INFO(24, 3, 18, 36),
94 IWL_DECLARE_RATE_INFO(36, 4, 24, 48),
95 IWL_DECLARE_RATE_INFO(48, 5, 36, 54),
96 IWL_DECLARE_RATE_INFO(54, 6, 48, INV),
97 IWL_DECLARE_MCS_RATE(7),
98 IWL_DECLARE_MCS_RATE(8),
99 IWL_DECLARE_MCS_RATE(9),
100};
101
102enum rs_action {
103 RS_ACTION_STAY = 0,
104 RS_ACTION_DOWNSCALE = -1,
105 RS_ACTION_UPSCALE = 1,
106};
107
108enum rs_column_mode {
109 RS_INVALID = 0,
110 RS_LEGACY,
111 RS_SISO,
112 RS_MIMO2,
113};
114
115#define MAX_NEXT_COLUMNS 7
116#define MAX_COLUMN_CHECKS 3
117
118struct rs_tx_column;
119
120typedef bool (*allow_column_func_t) (struct iwl_mvm *mvm,
121 struct ieee80211_sta *sta,
122 struct rs_rate *rate,
123 const struct rs_tx_column *next_col);
124
125struct rs_tx_column {
126 enum rs_column_mode mode;
127 u8 ant;
128 bool sgi;
129 enum rs_column next_columns[MAX_NEXT_COLUMNS];
130 allow_column_func_t checks[MAX_COLUMN_CHECKS];
131};
132
133static bool rs_ant_allow(struct iwl_mvm *mvm, struct ieee80211_sta *sta,
134 struct rs_rate *rate,
135 const struct rs_tx_column *next_col)
136{
137 return iwl_mvm_bt_coex_is_ant_avail(mvm, next_col->ant);
138}
139
140static bool rs_mimo_allow(struct iwl_mvm *mvm, struct ieee80211_sta *sta,
141 struct rs_rate *rate,
142 const struct rs_tx_column *next_col)
143{
144 if (!sta->ht_cap.ht_supported)
145 return false;
146
147 if (sta->smps_mode == IEEE80211_SMPS_STATIC)
148 return false;
149
150 if (num_of_ant(iwl_mvm_get_valid_tx_ant(mvm)) < 2)
151 return false;
152
153 if (!iwl_mvm_bt_coex_is_mimo_allowed(mvm, sta))
154 return false;
155
156 if (mvm->nvm_data->sku_cap_mimo_disabled)
157 return false;
158
159 return true;
160}
161
162static bool rs_siso_allow(struct iwl_mvm *mvm, struct ieee80211_sta *sta,
163 struct rs_rate *rate,
164 const struct rs_tx_column *next_col)
165{
166 if (!sta->ht_cap.ht_supported)
167 return false;
168
169 return true;
170}
171
172static bool rs_sgi_allow(struct iwl_mvm *mvm, struct ieee80211_sta *sta,
173 struct rs_rate *rate,
174 const struct rs_tx_column *next_col)
175{
176 struct ieee80211_sta_ht_cap *ht_cap = &sta->ht_cap;
177 struct ieee80211_sta_vht_cap *vht_cap = &sta->vht_cap;
178
179 if (is_ht20(rate) && (ht_cap->cap &
180 IEEE80211_HT_CAP_SGI_20))
181 return true;
182 if (is_ht40(rate) && (ht_cap->cap &
183 IEEE80211_HT_CAP_SGI_40))
184 return true;
185 if (is_ht80(rate) && (vht_cap->cap &
186 IEEE80211_VHT_CAP_SHORT_GI_80))
187 return true;
188 if (is_ht160(rate) && (vht_cap->cap &
189 IEEE80211_VHT_CAP_SHORT_GI_160))
190 return true;
191
192 return false;
193}
194
195static const struct rs_tx_column rs_tx_columns[] = {
196 [RS_COLUMN_LEGACY_ANT_A] = {
197 .mode = RS_LEGACY,
198 .ant = ANT_A,
199 .next_columns = {
200 RS_COLUMN_LEGACY_ANT_B,
201 RS_COLUMN_SISO_ANT_A,
202 RS_COLUMN_MIMO2,
203 RS_COLUMN_INVALID,
204 RS_COLUMN_INVALID,
205 RS_COLUMN_INVALID,
206 RS_COLUMN_INVALID,
207 },
208 .checks = {
209 rs_ant_allow,
210 },
211 },
212 [RS_COLUMN_LEGACY_ANT_B] = {
213 .mode = RS_LEGACY,
214 .ant = ANT_B,
215 .next_columns = {
216 RS_COLUMN_LEGACY_ANT_A,
217 RS_COLUMN_SISO_ANT_B,
218 RS_COLUMN_MIMO2,
219 RS_COLUMN_INVALID,
220 RS_COLUMN_INVALID,
221 RS_COLUMN_INVALID,
222 RS_COLUMN_INVALID,
223 },
224 .checks = {
225 rs_ant_allow,
226 },
227 },
228 [RS_COLUMN_SISO_ANT_A] = {
229 .mode = RS_SISO,
230 .ant = ANT_A,
231 .next_columns = {
232 RS_COLUMN_SISO_ANT_B,
233 RS_COLUMN_MIMO2,
234 RS_COLUMN_SISO_ANT_A_SGI,
235 RS_COLUMN_LEGACY_ANT_A,
236 RS_COLUMN_LEGACY_ANT_B,
237 RS_COLUMN_INVALID,
238 RS_COLUMN_INVALID,
239 },
240 .checks = {
241 rs_siso_allow,
242 rs_ant_allow,
243 },
244 },
245 [RS_COLUMN_SISO_ANT_B] = {
246 .mode = RS_SISO,
247 .ant = ANT_B,
248 .next_columns = {
249 RS_COLUMN_SISO_ANT_A,
250 RS_COLUMN_MIMO2,
251 RS_COLUMN_SISO_ANT_B_SGI,
252 RS_COLUMN_LEGACY_ANT_A,
253 RS_COLUMN_LEGACY_ANT_B,
254 RS_COLUMN_INVALID,
255 RS_COLUMN_INVALID,
256 },
257 .checks = {
258 rs_siso_allow,
259 rs_ant_allow,
260 },
261 },
262 [RS_COLUMN_SISO_ANT_A_SGI] = {
263 .mode = RS_SISO,
264 .ant = ANT_A,
265 .sgi = true,
266 .next_columns = {
267 RS_COLUMN_SISO_ANT_B_SGI,
268 RS_COLUMN_MIMO2_SGI,
269 RS_COLUMN_SISO_ANT_A,
270 RS_COLUMN_LEGACY_ANT_A,
271 RS_COLUMN_LEGACY_ANT_B,
272 RS_COLUMN_INVALID,
273 RS_COLUMN_INVALID,
274 },
275 .checks = {
276 rs_siso_allow,
277 rs_ant_allow,
278 rs_sgi_allow,
279 },
280 },
281 [RS_COLUMN_SISO_ANT_B_SGI] = {
282 .mode = RS_SISO,
283 .ant = ANT_B,
284 .sgi = true,
285 .next_columns = {
286 RS_COLUMN_SISO_ANT_A_SGI,
287 RS_COLUMN_MIMO2_SGI,
288 RS_COLUMN_SISO_ANT_B,
289 RS_COLUMN_LEGACY_ANT_A,
290 RS_COLUMN_LEGACY_ANT_B,
291 RS_COLUMN_INVALID,
292 RS_COLUMN_INVALID,
293 },
294 .checks = {
295 rs_siso_allow,
296 rs_ant_allow,
297 rs_sgi_allow,
298 },
299 },
300 [RS_COLUMN_MIMO2] = {
301 .mode = RS_MIMO2,
302 .ant = ANT_AB,
303 .next_columns = {
304 RS_COLUMN_SISO_ANT_A,
305 RS_COLUMN_MIMO2_SGI,
306 RS_COLUMN_LEGACY_ANT_A,
307 RS_COLUMN_LEGACY_ANT_B,
308 RS_COLUMN_INVALID,
309 RS_COLUMN_INVALID,
310 RS_COLUMN_INVALID,
311 },
312 .checks = {
313 rs_mimo_allow,
314 },
315 },
316 [RS_COLUMN_MIMO2_SGI] = {
317 .mode = RS_MIMO2,
318 .ant = ANT_AB,
319 .sgi = true,
320 .next_columns = {
321 RS_COLUMN_SISO_ANT_A_SGI,
322 RS_COLUMN_MIMO2,
323 RS_COLUMN_LEGACY_ANT_A,
324 RS_COLUMN_LEGACY_ANT_B,
325 RS_COLUMN_INVALID,
326 RS_COLUMN_INVALID,
327 RS_COLUMN_INVALID,
328 },
329 .checks = {
330 rs_mimo_allow,
331 rs_sgi_allow,
332 },
333 },
334};
335
336static inline u8 rs_extract_rate(u32 rate_n_flags)
337{
338
339 return (u8)(rate_n_flags & RATE_LEGACY_RATE_MSK);
340}
341
342static int iwl_hwrate_to_plcp_idx(u32 rate_n_flags)
343{
344 int idx = 0;
345
346 if (rate_n_flags & RATE_MCS_HT_MSK) {
347 idx = rate_n_flags & RATE_HT_MCS_RATE_CODE_MSK;
348 idx += IWL_RATE_MCS_0_INDEX;
349
350
351 if (idx >= IWL_RATE_9M_INDEX)
352 idx += 1;
353 if ((idx >= IWL_FIRST_HT_RATE) && (idx <= IWL_LAST_HT_RATE))
354 return idx;
355 } else if (rate_n_flags & RATE_MCS_VHT_MSK ||
356 rate_n_flags & RATE_MCS_HE_MSK) {
357 idx = rate_n_flags & RATE_VHT_MCS_RATE_CODE_MSK;
358 idx += IWL_RATE_MCS_0_INDEX;
359
360
361 if (idx >= IWL_RATE_9M_INDEX)
362 idx++;
363 if ((idx >= IWL_FIRST_VHT_RATE) && (idx <= IWL_LAST_VHT_RATE))
364 return idx;
365 if ((rate_n_flags & RATE_MCS_HE_MSK) &&
366 (idx <= IWL_LAST_HE_RATE))
367 return idx;
368 } else {
369
370
371 u8 legacy_rate = rs_extract_rate(rate_n_flags);
372 for (idx = 0; idx < ARRAY_SIZE(iwl_rates); idx++)
373 if (iwl_rates[idx].plcp == legacy_rate)
374 return idx;
375 }
376
377 return IWL_RATE_INVALID;
378}
379
380static void rs_rate_scale_perform(struct iwl_mvm *mvm,
381 struct ieee80211_sta *sta,
382 struct iwl_lq_sta *lq_sta,
383 int tid, bool ndp);
384static void rs_fill_lq_cmd(struct iwl_mvm *mvm,
385 struct ieee80211_sta *sta,
386 struct iwl_lq_sta *lq_sta,
387 const struct rs_rate *initial_rate);
388static void rs_stay_in_table(struct iwl_lq_sta *lq_sta, bool force_search);
389
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398
399
400
401static const u16 expected_tpt_legacy[IWL_RATE_COUNT] = {
402 7, 13, 35, 58, 40, 57, 72, 98, 121, 154, 177, 186, 0, 0, 0
403};
404
405
406
407
408static const u16 expected_tpt_siso_20MHz[4][IWL_RATE_COUNT] = {
409 {0, 0, 0, 0, 42, 0, 76, 102, 124, 159, 183, 193, 202, 216, 0},
410 {0, 0, 0, 0, 46, 0, 82, 110, 132, 168, 192, 202, 210, 225, 0},
411 {0, 0, 0, 0, 49, 0, 97, 145, 192, 285, 375, 420, 464, 551, 0},
412 {0, 0, 0, 0, 54, 0, 108, 160, 213, 315, 415, 465, 513, 608, 0},
413};
414
415static const u16 expected_tpt_siso_40MHz[4][IWL_RATE_COUNT] = {
416 {0, 0, 0, 0, 77, 0, 127, 160, 184, 220, 242, 250, 257, 269, 275},
417 {0, 0, 0, 0, 83, 0, 135, 169, 193, 229, 250, 257, 264, 275, 280},
418 {0, 0, 0, 0, 101, 0, 199, 295, 389, 570, 744, 828, 911, 1070, 1173},
419 {0, 0, 0, 0, 112, 0, 220, 326, 429, 629, 819, 912, 1000, 1173, 1284},
420};
421
422static const u16 expected_tpt_siso_80MHz[4][IWL_RATE_COUNT] = {
423 {0, 0, 0, 0, 130, 0, 191, 223, 244, 273, 288, 294, 298, 305, 308},
424 {0, 0, 0, 0, 138, 0, 200, 231, 251, 279, 293, 298, 302, 308, 312},
425 {0, 0, 0, 0, 217, 0, 429, 634, 834, 1220, 1585, 1760, 1931, 2258, 2466},
426 {0, 0, 0, 0, 241, 0, 475, 701, 921, 1343, 1741, 1931, 2117, 2468, 2691},
427};
428
429static const u16 expected_tpt_siso_160MHz[4][IWL_RATE_COUNT] = {
430 {0, 0, 0, 0, 191, 0, 244, 288, 298, 308, 313, 318, 323, 328, 330},
431 {0, 0, 0, 0, 200, 0, 251, 293, 302, 312, 317, 322, 327, 332, 334},
432 {0, 0, 0, 0, 439, 0, 875, 1307, 1736, 2584, 3419, 3831, 4240, 5049, 5581},
433 {0, 0, 0, 0, 488, 0, 972, 1451, 1925, 2864, 3785, 4240, 4691, 5581, 6165},
434};
435
436static const u16 expected_tpt_mimo2_20MHz[4][IWL_RATE_COUNT] = {
437 {0, 0, 0, 0, 74, 0, 123, 155, 179, 213, 235, 243, 250, 261, 0},
438 {0, 0, 0, 0, 81, 0, 131, 164, 187, 221, 242, 250, 256, 267, 0},
439 {0, 0, 0, 0, 98, 0, 193, 286, 375, 550, 718, 799, 878, 1032, 0},
440 {0, 0, 0, 0, 109, 0, 214, 316, 414, 607, 790, 879, 965, 1132, 0},
441};
442
443static const u16 expected_tpt_mimo2_40MHz[4][IWL_RATE_COUNT] = {
444 {0, 0, 0, 0, 123, 0, 182, 214, 235, 264, 279, 285, 289, 296, 300},
445 {0, 0, 0, 0, 131, 0, 191, 222, 242, 270, 284, 289, 293, 300, 303},
446 {0, 0, 0, 0, 200, 0, 390, 571, 741, 1067, 1365, 1505, 1640, 1894, 2053},
447 {0, 0, 0, 0, 221, 0, 430, 630, 816, 1169, 1490, 1641, 1784, 2053, 2221},
448};
449
450static const u16 expected_tpt_mimo2_80MHz[4][IWL_RATE_COUNT] = {
451 {0, 0, 0, 0, 182, 0, 240, 264, 278, 299, 308, 311, 313, 317, 319},
452 {0, 0, 0, 0, 190, 0, 247, 269, 282, 302, 310, 313, 315, 319, 320},
453 {0, 0, 0, 0, 428, 0, 833, 1215, 1577, 2254, 2863, 3147, 3418, 3913, 4219},
454 {0, 0, 0, 0, 474, 0, 920, 1338, 1732, 2464, 3116, 3418, 3705, 4225, 4545},
455};
456
457static const u16 expected_tpt_mimo2_160MHz[4][IWL_RATE_COUNT] = {
458 {0, 0, 0, 0, 240, 0, 278, 308, 313, 319, 322, 324, 328, 330, 334},
459 {0, 0, 0, 0, 247, 0, 282, 310, 315, 320, 323, 325, 329, 332, 338},
460 {0, 0, 0, 0, 875, 0, 1735, 2582, 3414, 5043, 6619, 7389, 8147, 9629, 10592},
461 {0, 0, 0, 0, 971, 0, 1925, 2861, 3779, 5574, 7304, 8147, 8976, 10592, 11640},
462};
463
464
465static const struct iwl_rate_mcs_info iwl_rate_mcs[IWL_RATE_COUNT] = {
466 { "1", "BPSK DSSS"},
467 { "2", "QPSK DSSS"},
468 {"5.5", "BPSK CCK"},
469 { "11", "QPSK CCK"},
470 { "6", "BPSK 1/2"},
471 { "9", "BPSK 1/2"},
472 { "12", "QPSK 1/2"},
473 { "18", "QPSK 3/4"},
474 { "24", "16QAM 1/2"},
475 { "36", "16QAM 3/4"},
476 { "48", "64QAM 2/3"},
477 { "54", "64QAM 3/4"},
478 { "60", "64QAM 5/6"},
479};
480
481#define MCS_INDEX_PER_STREAM (8)
482
483static const char *rs_pretty_ant(u8 ant)
484{
485 static const char * const ant_name[] = {
486 [ANT_NONE] = "None",
487 [ANT_A] = "A",
488 [ANT_B] = "B",
489 [ANT_AB] = "AB",
490 [ANT_C] = "C",
491 [ANT_AC] = "AC",
492 [ANT_BC] = "BC",
493 [ANT_ABC] = "ABC",
494 };
495
496 if (ant > ANT_ABC)
497 return "UNKNOWN";
498
499 return ant_name[ant];
500}
501
502static const char *rs_pretty_lq_type(enum iwl_table_type type)
503{
504 static const char * const lq_types[] = {
505 [LQ_NONE] = "NONE",
506 [LQ_LEGACY_A] = "LEGACY_A",
507 [LQ_LEGACY_G] = "LEGACY_G",
508 [LQ_HT_SISO] = "HT SISO",
509 [LQ_HT_MIMO2] = "HT MIMO",
510 [LQ_VHT_SISO] = "VHT SISO",
511 [LQ_VHT_MIMO2] = "VHT MIMO",
512 [LQ_HE_SISO] = "HE SISO",
513 [LQ_HE_MIMO2] = "HE MIMO",
514 };
515
516 if (type < LQ_NONE || type >= LQ_MAX)
517 return "UNKNOWN";
518
519 return lq_types[type];
520}
521
522static char *rs_pretty_rate(const struct rs_rate *rate)
523{
524 static char buf[40];
525 static const char * const legacy_rates[] = {
526 [IWL_RATE_1M_INDEX] = "1M",
527 [IWL_RATE_2M_INDEX] = "2M",
528 [IWL_RATE_5M_INDEX] = "5.5M",
529 [IWL_RATE_11M_INDEX] = "11M",
530 [IWL_RATE_6M_INDEX] = "6M",
531 [IWL_RATE_9M_INDEX] = "9M",
532 [IWL_RATE_12M_INDEX] = "12M",
533 [IWL_RATE_18M_INDEX] = "18M",
534 [IWL_RATE_24M_INDEX] = "24M",
535 [IWL_RATE_36M_INDEX] = "36M",
536 [IWL_RATE_48M_INDEX] = "48M",
537 [IWL_RATE_54M_INDEX] = "54M",
538 };
539 static const char *const ht_vht_rates[] = {
540 [IWL_RATE_MCS_0_INDEX] = "MCS0",
541 [IWL_RATE_MCS_1_INDEX] = "MCS1",
542 [IWL_RATE_MCS_2_INDEX] = "MCS2",
543 [IWL_RATE_MCS_3_INDEX] = "MCS3",
544 [IWL_RATE_MCS_4_INDEX] = "MCS4",
545 [IWL_RATE_MCS_5_INDEX] = "MCS5",
546 [IWL_RATE_MCS_6_INDEX] = "MCS6",
547 [IWL_RATE_MCS_7_INDEX] = "MCS7",
548 [IWL_RATE_MCS_8_INDEX] = "MCS8",
549 [IWL_RATE_MCS_9_INDEX] = "MCS9",
550 };
551 const char *rate_str;
552
553 if (is_type_legacy(rate->type) && (rate->index <= IWL_RATE_54M_INDEX))
554 rate_str = legacy_rates[rate->index];
555 else if ((is_type_ht(rate->type) || is_type_vht(rate->type)) &&
556 (rate->index >= IWL_RATE_MCS_0_INDEX) &&
557 (rate->index <= IWL_RATE_MCS_9_INDEX))
558 rate_str = ht_vht_rates[rate->index];
559 else
560 rate_str = "BAD_RATE";
561
562 sprintf(buf, "(%s|%s|%s)", rs_pretty_lq_type(rate->type),
563 rs_pretty_ant(rate->ant), rate_str);
564 return buf;
565}
566
567static inline void rs_dump_rate(struct iwl_mvm *mvm, const struct rs_rate *rate,
568 const char *prefix)
569{
570 IWL_DEBUG_RATE(mvm,
571 "%s: %s BW: %d SGI: %d LDPC: %d STBC: %d\n",
572 prefix, rs_pretty_rate(rate), rate->bw,
573 rate->sgi, rate->ldpc, rate->stbc);
574}
575
576static void rs_rate_scale_clear_window(struct iwl_rate_scale_data *window)
577{
578 window->data = 0;
579 window->success_counter = 0;
580 window->success_ratio = IWL_INVALID_VALUE;
581 window->counter = 0;
582 window->average_tpt = IWL_INVALID_VALUE;
583}
584
585static void rs_rate_scale_clear_tbl_windows(struct iwl_mvm *mvm,
586 struct iwl_scale_tbl_info *tbl)
587{
588 int i;
589
590 IWL_DEBUG_RATE(mvm, "Clearing up window stats\n");
591 for (i = 0; i < IWL_RATE_COUNT; i++)
592 rs_rate_scale_clear_window(&tbl->win[i]);
593
594 for (i = 0; i < ARRAY_SIZE(tbl->tpc_win); i++)
595 rs_rate_scale_clear_window(&tbl->tpc_win[i]);
596}
597
598static inline u8 rs_is_valid_ant(u8 valid_antenna, u8 ant_type)
599{
600 return (ant_type & valid_antenna) == ant_type;
601}
602
603static int rs_tl_turn_on_agg_for_tid(struct iwl_mvm *mvm,
604 struct iwl_lq_sta *lq_data, u8 tid,
605 struct ieee80211_sta *sta)
606{
607 int ret = -EAGAIN;
608
609 IWL_DEBUG_HT(mvm, "Starting Tx agg: STA: %pM tid: %d\n",
610 sta->addr, tid);
611
612
613 ret = ieee80211_start_tx_ba_session(sta, tid, 0);
614 if (ret == -EAGAIN) {
615
616
617
618
619
620 IWL_ERR(mvm, "Fail start Tx agg on tid: %d\n",
621 tid);
622 ieee80211_stop_tx_ba_session(sta, tid);
623 }
624 return ret;
625}
626
627static void rs_tl_turn_on_agg(struct iwl_mvm *mvm, struct iwl_mvm_sta *mvmsta,
628 u8 tid, struct iwl_lq_sta *lq_sta,
629 struct ieee80211_sta *sta)
630{
631 struct iwl_mvm_tid_data *tid_data;
632
633
634
635
636
637 if (WARN_ON_ONCE(tid > IWL_MAX_TID_COUNT)) {
638 IWL_ERR(mvm, "tid exceeds max TID count: %d/%d\n",
639 tid, IWL_MAX_TID_COUNT);
640 return;
641 } else if (tid == IWL_MAX_TID_COUNT) {
642 return;
643 }
644
645 tid_data = &mvmsta->tid_data[tid];
646 if (mvmsta->sta_state >= IEEE80211_STA_AUTHORIZED &&
647 tid_data->state == IWL_AGG_OFF &&
648 (lq_sta->tx_agg_tid_en & BIT(tid)) &&
649 tid_data->tx_count_last >= IWL_MVM_RS_AGG_START_THRESHOLD) {
650 IWL_DEBUG_RATE(mvm, "try to aggregate tid %d\n", tid);
651 if (rs_tl_turn_on_agg_for_tid(mvm, lq_sta, tid, sta) == 0)
652 tid_data->state = IWL_AGG_QUEUED;
653 }
654}
655
656static inline int get_num_of_ant_from_rate(u32 rate_n_flags)
657{
658 return !!(rate_n_flags & RATE_MCS_ANT_A_MSK) +
659 !!(rate_n_flags & RATE_MCS_ANT_B_MSK) +
660 !!(rate_n_flags & RATE_MCS_ANT_C_MSK);
661}
662
663
664
665
666
667static s32 get_expected_tpt(struct iwl_scale_tbl_info *tbl, int rs_index)
668{
669 if (tbl->expected_tpt)
670 return tbl->expected_tpt[rs_index];
671 return 0;
672}
673
674
675
676
677
678
679
680
681static int _rs_collect_tx_data(struct iwl_mvm *mvm,
682 struct iwl_scale_tbl_info *tbl,
683 int scale_index, int attempts, int successes,
684 struct iwl_rate_scale_data *window)
685{
686 static const u64 mask = (((u64)1) << (IWL_RATE_MAX_WINDOW - 1));
687 s32 fail_count, tpt;
688
689
690 tpt = get_expected_tpt(tbl, scale_index);
691
692
693
694
695
696
697
698
699
700 while (attempts > 0) {
701 if (window->counter >= IWL_RATE_MAX_WINDOW) {
702
703 window->counter = IWL_RATE_MAX_WINDOW - 1;
704
705 if (window->data & mask) {
706 window->data &= ~mask;
707 window->success_counter--;
708 }
709 }
710
711
712 window->counter++;
713
714
715 window->data <<= 1;
716
717
718 if (successes > 0) {
719 window->success_counter++;
720 window->data |= 0x1;
721 successes--;
722 }
723
724 attempts--;
725 }
726
727
728 if (window->counter > 0)
729 window->success_ratio = 128 * (100 * window->success_counter)
730 / window->counter;
731 else
732 window->success_ratio = IWL_INVALID_VALUE;
733
734 fail_count = window->counter - window->success_counter;
735
736
737 if ((fail_count >= IWL_MVM_RS_RATE_MIN_FAILURE_TH) ||
738 (window->success_counter >= IWL_MVM_RS_RATE_MIN_SUCCESS_TH))
739 window->average_tpt = (window->success_ratio * tpt + 64) / 128;
740 else
741 window->average_tpt = IWL_INVALID_VALUE;
742
743 return 0;
744}
745
746static int rs_collect_tpc_data(struct iwl_mvm *mvm,
747 struct iwl_lq_sta *lq_sta,
748 struct iwl_scale_tbl_info *tbl,
749 int scale_index, int attempts, int successes,
750 u8 reduced_txp)
751{
752 struct iwl_rate_scale_data *window = NULL;
753
754 if (WARN_ON_ONCE(reduced_txp > TPC_MAX_REDUCTION))
755 return -EINVAL;
756
757 window = &tbl->tpc_win[reduced_txp];
758 return _rs_collect_tx_data(mvm, tbl, scale_index, attempts, successes,
759 window);
760}
761
762static void rs_update_tid_tpt_stats(struct iwl_mvm *mvm,
763 struct iwl_mvm_sta *mvmsta,
764 u8 tid, int successes)
765{
766 struct iwl_mvm_tid_data *tid_data;
767
768 if (tid >= IWL_MAX_TID_COUNT)
769 return;
770
771 tid_data = &mvmsta->tid_data[tid];
772
773
774
775
776
777
778
779 if (tid_data->state != IWL_AGG_OFF)
780 return;
781
782 if (time_is_before_jiffies(tid_data->tpt_meas_start + HZ) ||
783 (tid_data->tx_count >= IWL_MVM_RS_AGG_START_THRESHOLD)) {
784 tid_data->tx_count_last = tid_data->tx_count;
785 tid_data->tx_count = 0;
786 tid_data->tpt_meas_start = jiffies;
787 } else {
788 tid_data->tx_count += successes;
789 }
790}
791
792static int rs_collect_tlc_data(struct iwl_mvm *mvm,
793 struct iwl_mvm_sta *mvmsta, u8 tid,
794 struct iwl_scale_tbl_info *tbl,
795 int scale_index, int attempts, int successes)
796{
797 struct iwl_rate_scale_data *window = NULL;
798
799 if (scale_index < 0 || scale_index >= IWL_RATE_COUNT)
800 return -EINVAL;
801
802 if (tbl->column != RS_COLUMN_INVALID) {
803 struct lq_sta_pers *pers = &mvmsta->lq_sta.rs_drv.pers;
804
805 pers->tx_stats[tbl->column][scale_index].total += attempts;
806 pers->tx_stats[tbl->column][scale_index].success += successes;
807 }
808
809 rs_update_tid_tpt_stats(mvm, mvmsta, tid, successes);
810
811
812 window = &(tbl->win[scale_index]);
813 return _rs_collect_tx_data(mvm, tbl, scale_index, attempts, successes,
814 window);
815}
816
817
818static u32 ucode_rate_from_rs_rate(struct iwl_mvm *mvm,
819 struct rs_rate *rate)
820{
821 u32 ucode_rate = 0;
822 int index = rate->index;
823
824 ucode_rate |= ((rate->ant << RATE_MCS_ANT_POS) &
825 RATE_MCS_ANT_ABC_MSK);
826
827 if (is_legacy(rate)) {
828 ucode_rate |= iwl_rates[index].plcp;
829 if (index >= IWL_FIRST_CCK_RATE && index <= IWL_LAST_CCK_RATE)
830 ucode_rate |= RATE_MCS_CCK_MSK;
831 return ucode_rate;
832 }
833
834 if (is_ht(rate)) {
835 if (index < IWL_FIRST_HT_RATE || index > IWL_LAST_HT_RATE) {
836 IWL_ERR(mvm, "Invalid HT rate index %d\n", index);
837 index = IWL_LAST_HT_RATE;
838 }
839 ucode_rate |= RATE_MCS_HT_MSK;
840
841 if (is_ht_siso(rate))
842 ucode_rate |= iwl_rates[index].plcp_ht_siso;
843 else if (is_ht_mimo2(rate))
844 ucode_rate |= iwl_rates[index].plcp_ht_mimo2;
845 else
846 WARN_ON_ONCE(1);
847 } else if (is_vht(rate)) {
848 if (index < IWL_FIRST_VHT_RATE || index > IWL_LAST_VHT_RATE) {
849 IWL_ERR(mvm, "Invalid VHT rate index %d\n", index);
850 index = IWL_LAST_VHT_RATE;
851 }
852 ucode_rate |= RATE_MCS_VHT_MSK;
853 if (is_vht_siso(rate))
854 ucode_rate |= iwl_rates[index].plcp_vht_siso;
855 else if (is_vht_mimo2(rate))
856 ucode_rate |= iwl_rates[index].plcp_vht_mimo2;
857 else
858 WARN_ON_ONCE(1);
859
860 } else {
861 IWL_ERR(mvm, "Invalid rate->type %d\n", rate->type);
862 }
863
864 if (is_siso(rate) && rate->stbc) {
865
866 ucode_rate |= RATE_MCS_ANT_AB_MSK;
867 ucode_rate |= RATE_MCS_STBC_MSK;
868 }
869
870 ucode_rate |= rate->bw;
871 if (rate->sgi)
872 ucode_rate |= RATE_MCS_SGI_MSK;
873 if (rate->ldpc)
874 ucode_rate |= RATE_MCS_LDPC_MSK;
875
876 return ucode_rate;
877}
878
879
880static int rs_rate_from_ucode_rate(const u32 ucode_rate,
881 enum nl80211_band band,
882 struct rs_rate *rate)
883{
884 u32 ant_msk = ucode_rate & RATE_MCS_ANT_ABC_MSK;
885 u8 num_of_ant = get_num_of_ant_from_rate(ucode_rate);
886 u8 nss;
887
888 memset(rate, 0, sizeof(*rate));
889 rate->index = iwl_hwrate_to_plcp_idx(ucode_rate);
890
891 if (rate->index == IWL_RATE_INVALID)
892 return -EINVAL;
893
894 rate->ant = (ant_msk >> RATE_MCS_ANT_POS);
895
896
897 if (!(ucode_rate & RATE_MCS_HT_MSK) &&
898 !(ucode_rate & RATE_MCS_VHT_MSK) &&
899 !(ucode_rate & RATE_MCS_HE_MSK)) {
900 if (num_of_ant == 1) {
901 if (band == NL80211_BAND_5GHZ)
902 rate->type = LQ_LEGACY_A;
903 else
904 rate->type = LQ_LEGACY_G;
905 }
906
907 return 0;
908 }
909
910
911 if (ucode_rate & RATE_MCS_SGI_MSK)
912 rate->sgi = true;
913 if (ucode_rate & RATE_MCS_LDPC_MSK)
914 rate->ldpc = true;
915 if (ucode_rate & RATE_MCS_STBC_MSK)
916 rate->stbc = true;
917 if (ucode_rate & RATE_MCS_BF_MSK)
918 rate->bfer = true;
919
920 rate->bw = ucode_rate & RATE_MCS_CHAN_WIDTH_MSK;
921
922 if (ucode_rate & RATE_MCS_HT_MSK) {
923 nss = ((ucode_rate & RATE_HT_MCS_NSS_MSK) >>
924 RATE_HT_MCS_NSS_POS) + 1;
925
926 if (nss == 1) {
927 rate->type = LQ_HT_SISO;
928 WARN_ONCE(!rate->stbc && !rate->bfer && num_of_ant != 1,
929 "stbc %d bfer %d",
930 rate->stbc, rate->bfer);
931 } else if (nss == 2) {
932 rate->type = LQ_HT_MIMO2;
933 WARN_ON_ONCE(num_of_ant != 2);
934 } else {
935 WARN_ON_ONCE(1);
936 }
937 } else if (ucode_rate & RATE_MCS_VHT_MSK) {
938 nss = ((ucode_rate & RATE_VHT_MCS_NSS_MSK) >>
939 RATE_VHT_MCS_NSS_POS) + 1;
940
941 if (nss == 1) {
942 rate->type = LQ_VHT_SISO;
943 WARN_ONCE(!rate->stbc && !rate->bfer && num_of_ant != 1,
944 "stbc %d bfer %d",
945 rate->stbc, rate->bfer);
946 } else if (nss == 2) {
947 rate->type = LQ_VHT_MIMO2;
948 WARN_ON_ONCE(num_of_ant != 2);
949 } else {
950 WARN_ON_ONCE(1);
951 }
952 } else if (ucode_rate & RATE_MCS_HE_MSK) {
953 nss = ((ucode_rate & RATE_VHT_MCS_NSS_MSK) >>
954 RATE_VHT_MCS_NSS_POS) + 1;
955
956 if (nss == 1) {
957 rate->type = LQ_HE_SISO;
958 WARN_ONCE(!rate->stbc && !rate->bfer && num_of_ant != 1,
959 "stbc %d bfer %d", rate->stbc, rate->bfer);
960 } else if (nss == 2) {
961 rate->type = LQ_HE_MIMO2;
962 WARN_ON_ONCE(num_of_ant != 2);
963 } else {
964 WARN_ON_ONCE(1);
965 }
966 }
967
968 WARN_ON_ONCE(rate->bw == RATE_MCS_CHAN_WIDTH_80 &&
969 !is_he(rate) && !is_vht(rate));
970
971 return 0;
972}
973
974
975
976static int rs_toggle_antenna(u32 valid_ant, struct rs_rate *rate)
977{
978 u8 new_ant_type;
979
980 if (!rate->ant || WARN_ON_ONCE(rate->ant & ANT_C))
981 return 0;
982
983 if (!rs_is_valid_ant(valid_ant, rate->ant))
984 return 0;
985
986 new_ant_type = ant_toggle_lookup[rate->ant];
987
988 while ((new_ant_type != rate->ant) &&
989 !rs_is_valid_ant(valid_ant, new_ant_type))
990 new_ant_type = ant_toggle_lookup[new_ant_type];
991
992 if (new_ant_type == rate->ant)
993 return 0;
994
995 rate->ant = new_ant_type;
996
997 return 1;
998}
999
1000static u16 rs_get_supported_rates(struct iwl_lq_sta *lq_sta,
1001 struct rs_rate *rate)
1002{
1003 if (is_legacy(rate))
1004 return lq_sta->active_legacy_rate;
1005 else if (is_siso(rate))
1006 return lq_sta->active_siso_rate;
1007 else if (is_mimo2(rate))
1008 return lq_sta->active_mimo2_rate;
1009
1010 WARN_ON_ONCE(1);
1011 return 0;
1012}
1013
1014static u16 rs_get_adjacent_rate(struct iwl_mvm *mvm, u8 index, u16 rate_mask,
1015 int rate_type)
1016{
1017 u8 high = IWL_RATE_INVALID;
1018 u8 low = IWL_RATE_INVALID;
1019
1020
1021
1022 if (is_type_a_band(rate_type) || !is_type_legacy(rate_type)) {
1023 int i;
1024 u32 mask;
1025
1026
1027 i = index - 1;
1028 if (i >= 0)
1029 mask = BIT(i);
1030 for (; i >= 0; i--, mask >>= 1) {
1031 if (rate_mask & mask) {
1032 low = i;
1033 break;
1034 }
1035 }
1036
1037
1038 i = index + 1;
1039 for (mask = (1 << i); i < IWL_RATE_COUNT; i++, mask <<= 1) {
1040 if (rate_mask & mask) {
1041 high = i;
1042 break;
1043 }
1044 }
1045
1046 return (high << 8) | low;
1047 }
1048
1049 low = index;
1050 while (low != IWL_RATE_INVALID) {
1051 low = iwl_rates[low].prev_rs;
1052 if (low == IWL_RATE_INVALID)
1053 break;
1054 if (rate_mask & (1 << low))
1055 break;
1056 }
1057
1058 high = index;
1059 while (high != IWL_RATE_INVALID) {
1060 high = iwl_rates[high].next_rs;
1061 if (high == IWL_RATE_INVALID)
1062 break;
1063 if (rate_mask & (1 << high))
1064 break;
1065 }
1066
1067 return (high << 8) | low;
1068}
1069
1070static inline bool rs_rate_supported(struct iwl_lq_sta *lq_sta,
1071 struct rs_rate *rate)
1072{
1073 return BIT(rate->index) & rs_get_supported_rates(lq_sta, rate);
1074}
1075
1076
1077
1078
1079static bool rs_get_lower_rate_in_column(struct iwl_lq_sta *lq_sta,
1080 struct rs_rate *rate)
1081{
1082 u8 low;
1083 u16 high_low;
1084 u16 rate_mask;
1085 struct iwl_mvm *mvm = lq_sta->pers.drv;
1086
1087 rate_mask = rs_get_supported_rates(lq_sta, rate);
1088 high_low = rs_get_adjacent_rate(mvm, rate->index, rate_mask,
1089 rate->type);
1090 low = high_low & 0xff;
1091
1092
1093 if (low == IWL_RATE_INVALID)
1094 return true;
1095
1096 rate->index = low;
1097 return false;
1098}
1099
1100
1101static void rs_get_lower_rate_down_column(struct iwl_lq_sta *lq_sta,
1102 struct rs_rate *rate)
1103{
1104 struct iwl_mvm *mvm = lq_sta->pers.drv;
1105
1106 if (is_legacy(rate)) {
1107
1108 return;
1109 } else if (is_siso(rate)) {
1110
1111 if (lq_sta->band == NL80211_BAND_5GHZ)
1112 rate->type = LQ_LEGACY_A;
1113 else
1114 rate->type = LQ_LEGACY_G;
1115
1116 rate->bw = RATE_MCS_CHAN_WIDTH_20;
1117
1118 WARN_ON_ONCE(rate->index < IWL_RATE_MCS_0_INDEX ||
1119 rate->index > IWL_RATE_MCS_9_INDEX);
1120
1121 rate->index = rs_ht_to_legacy[rate->index];
1122 rate->ldpc = false;
1123 } else {
1124
1125 rate->type = is_vht_mimo2(rate) ?
1126 LQ_VHT_SISO : LQ_HT_SISO;
1127 }
1128
1129 if (num_of_ant(rate->ant) > 1)
1130 rate->ant = first_antenna(iwl_mvm_get_valid_tx_ant(mvm));
1131
1132
1133 rate->sgi = false;
1134
1135 if (!rs_rate_supported(lq_sta, rate))
1136 rs_get_lower_rate_in_column(lq_sta, rate);
1137}
1138
1139
1140static inline bool rs_rate_column_match(struct rs_rate *a,
1141 struct rs_rate *b)
1142{
1143 bool ant_match;
1144
1145 if (a->stbc || a->bfer)
1146 ant_match = (b->ant == ANT_A || b->ant == ANT_B);
1147 else
1148 ant_match = (a->ant == b->ant);
1149
1150 return (a->type == b->type) && (a->bw == b->bw) && (a->sgi == b->sgi)
1151 && ant_match;
1152}
1153
1154static inline enum rs_column rs_get_column_from_rate(struct rs_rate *rate)
1155{
1156 if (is_legacy(rate)) {
1157 if (rate->ant == ANT_A)
1158 return RS_COLUMN_LEGACY_ANT_A;
1159
1160 if (rate->ant == ANT_B)
1161 return RS_COLUMN_LEGACY_ANT_B;
1162
1163 goto err;
1164 }
1165
1166 if (is_siso(rate)) {
1167 if (rate->ant == ANT_A || rate->stbc || rate->bfer)
1168 return rate->sgi ? RS_COLUMN_SISO_ANT_A_SGI :
1169 RS_COLUMN_SISO_ANT_A;
1170
1171 if (rate->ant == ANT_B)
1172 return rate->sgi ? RS_COLUMN_SISO_ANT_B_SGI :
1173 RS_COLUMN_SISO_ANT_B;
1174
1175 goto err;
1176 }
1177
1178 if (is_mimo(rate))
1179 return rate->sgi ? RS_COLUMN_MIMO2_SGI : RS_COLUMN_MIMO2;
1180
1181err:
1182 return RS_COLUMN_INVALID;
1183}
1184
1185static u8 rs_get_tid(struct ieee80211_hdr *hdr)
1186{
1187 u8 tid = IWL_MAX_TID_COUNT;
1188
1189 if (ieee80211_is_data_qos(hdr->frame_control)) {
1190 u8 *qc = ieee80211_get_qos_ctl(hdr);
1191 tid = qc[0] & 0xf;
1192 }
1193
1194 if (unlikely(tid > IWL_MAX_TID_COUNT))
1195 tid = IWL_MAX_TID_COUNT;
1196
1197 return tid;
1198}
1199
1200void iwl_mvm_rs_tx_status(struct iwl_mvm *mvm, struct ieee80211_sta *sta,
1201 int tid, struct ieee80211_tx_info *info, bool ndp)
1202{
1203 int legacy_success;
1204 int retries;
1205 int i;
1206 struct iwl_lq_cmd *table;
1207 u32 lq_hwrate;
1208 struct rs_rate lq_rate, tx_resp_rate;
1209 struct iwl_scale_tbl_info *curr_tbl, *other_tbl, *tmp_tbl;
1210 u32 tlc_info = (uintptr_t)info->status.status_driver_data[0];
1211 u8 reduced_txp = tlc_info & RS_DRV_DATA_TXP_MSK;
1212 u8 lq_color = RS_DRV_DATA_LQ_COLOR_GET(tlc_info);
1213 u32 tx_resp_hwrate = (uintptr_t)info->status.status_driver_data[1];
1214 struct iwl_mvm_sta *mvmsta = iwl_mvm_sta_from_mac80211(sta);
1215 struct iwl_lq_sta *lq_sta = &mvmsta->lq_sta.rs_drv;
1216
1217
1218 if (!lq_sta) {
1219 IWL_DEBUG_RATE(mvm, "Station rate scaling not created yet.\n");
1220 return;
1221 } else if (!lq_sta->pers.drv) {
1222 IWL_DEBUG_RATE(mvm, "Rate scaling not initialized yet.\n");
1223 return;
1224 }
1225
1226
1227 if ((info->flags & IEEE80211_TX_CTL_AMPDU) &&
1228 !(info->flags & IEEE80211_TX_STAT_AMPDU))
1229 return;
1230
1231 if (rs_rate_from_ucode_rate(tx_resp_hwrate, info->band,
1232 &tx_resp_rate)) {
1233 WARN_ON_ONCE(1);
1234 return;
1235 }
1236
1237#ifdef CONFIG_MAC80211_DEBUGFS
1238
1239
1240 if (lq_sta->pers.dbg_fixed_rate) {
1241 int index = tx_resp_rate.index;
1242 enum rs_column column;
1243 int attempts, success;
1244
1245 column = rs_get_column_from_rate(&tx_resp_rate);
1246 if (WARN_ONCE(column == RS_COLUMN_INVALID,
1247 "Can't map rate 0x%x to column",
1248 tx_resp_hwrate))
1249 return;
1250
1251 if (info->flags & IEEE80211_TX_STAT_AMPDU) {
1252 attempts = info->status.ampdu_len;
1253 success = info->status.ampdu_ack_len;
1254 } else {
1255 attempts = info->status.rates[0].count;
1256 success = !!(info->flags & IEEE80211_TX_STAT_ACK);
1257 }
1258
1259 lq_sta->pers.tx_stats[column][index].total += attempts;
1260 lq_sta->pers.tx_stats[column][index].success += success;
1261
1262 IWL_DEBUG_RATE(mvm, "Fixed rate 0x%x success %d attempts %d\n",
1263 tx_resp_hwrate, success, attempts);
1264 return;
1265 }
1266#endif
1267
1268 if (time_after(jiffies,
1269 (unsigned long)(lq_sta->last_tx +
1270 (IWL_MVM_RS_IDLE_TIMEOUT * HZ)))) {
1271 IWL_DEBUG_RATE(mvm, "Tx idle for too long. reinit rs\n");
1272 iwl_mvm_rs_rate_init(mvm, sta, info->band, true);
1273 return;
1274 }
1275 lq_sta->last_tx = jiffies;
1276
1277
1278
1279
1280
1281
1282
1283
1284 table = &lq_sta->lq;
1285 lq_hwrate = le32_to_cpu(table->rs_table[0]);
1286 if (rs_rate_from_ucode_rate(lq_hwrate, info->band, &lq_rate)) {
1287 WARN_ON_ONCE(1);
1288 return;
1289 }
1290
1291
1292 if (lq_color != LQ_FLAG_COLOR_GET(table->flags)) {
1293 IWL_DEBUG_RATE(mvm,
1294 "tx resp color 0x%x does not match 0x%x\n",
1295 lq_color, LQ_FLAG_COLOR_GET(table->flags));
1296
1297
1298
1299
1300
1301
1302 lq_sta->missed_rate_counter++;
1303 if (lq_sta->missed_rate_counter > IWL_MVM_RS_MISSED_RATE_MAX) {
1304 lq_sta->missed_rate_counter = 0;
1305 IWL_DEBUG_RATE(mvm,
1306 "Too many rates mismatch. Send sync LQ. rs_state %d\n",
1307 lq_sta->rs_state);
1308 iwl_mvm_send_lq_cmd(mvm, &lq_sta->lq, false);
1309 }
1310
1311 return;
1312 } else
1313
1314 lq_sta->missed_rate_counter = 0;
1315
1316 if (!lq_sta->search_better_tbl) {
1317 curr_tbl = &(lq_sta->lq_info[lq_sta->active_tbl]);
1318 other_tbl = &(lq_sta->lq_info[1 - lq_sta->active_tbl]);
1319 } else {
1320 curr_tbl = &(lq_sta->lq_info[1 - lq_sta->active_tbl]);
1321 other_tbl = &(lq_sta->lq_info[lq_sta->active_tbl]);
1322 }
1323
1324 if (WARN_ON_ONCE(!rs_rate_column_match(&lq_rate, &curr_tbl->rate))) {
1325 IWL_DEBUG_RATE(mvm,
1326 "Neither active nor search matches tx rate\n");
1327 tmp_tbl = &(lq_sta->lq_info[lq_sta->active_tbl]);
1328 rs_dump_rate(mvm, &tmp_tbl->rate, "ACTIVE");
1329 tmp_tbl = &(lq_sta->lq_info[1 - lq_sta->active_tbl]);
1330 rs_dump_rate(mvm, &tmp_tbl->rate, "SEARCH");
1331 rs_dump_rate(mvm, &lq_rate, "ACTUAL");
1332
1333
1334
1335
1336
1337 rs_stay_in_table(lq_sta, true);
1338 goto done;
1339 }
1340
1341
1342
1343
1344
1345
1346
1347
1348 if (info->flags & IEEE80211_TX_STAT_AMPDU) {
1349 rs_collect_tpc_data(mvm, lq_sta, curr_tbl, tx_resp_rate.index,
1350 info->status.ampdu_len,
1351 info->status.ampdu_ack_len,
1352 reduced_txp);
1353
1354
1355
1356
1357
1358
1359
1360
1361
1362
1363
1364
1365
1366
1367 if (info->status.ampdu_ack_len == 0)
1368 info->status.ampdu_len = 1;
1369
1370 rs_collect_tlc_data(mvm, mvmsta, tid, curr_tbl, tx_resp_rate.index,
1371 info->status.ampdu_len,
1372 info->status.ampdu_ack_len);
1373
1374
1375 if (lq_sta->rs_state == RS_STATE_STAY_IN_COLUMN) {
1376 lq_sta->total_success += info->status.ampdu_ack_len;
1377 lq_sta->total_failed += (info->status.ampdu_len -
1378 info->status.ampdu_ack_len);
1379 }
1380 } else {
1381
1382 retries = info->status.rates[0].count - 1;
1383
1384 retries = min(retries, 15);
1385
1386
1387 legacy_success = !!(info->flags & IEEE80211_TX_STAT_ACK);
1388
1389 for (i = 0; i <= retries; ++i) {
1390 lq_hwrate = le32_to_cpu(table->rs_table[i]);
1391 if (rs_rate_from_ucode_rate(lq_hwrate, info->band,
1392 &lq_rate)) {
1393 WARN_ON_ONCE(1);
1394 return;
1395 }
1396
1397
1398
1399
1400
1401 if (rs_rate_column_match(&lq_rate, &curr_tbl->rate))
1402 tmp_tbl = curr_tbl;
1403 else if (rs_rate_column_match(&lq_rate,
1404 &other_tbl->rate))
1405 tmp_tbl = other_tbl;
1406 else
1407 continue;
1408
1409 rs_collect_tpc_data(mvm, lq_sta, tmp_tbl,
1410 tx_resp_rate.index, 1,
1411 i < retries ? 0 : legacy_success,
1412 reduced_txp);
1413 rs_collect_tlc_data(mvm, mvmsta, tid, tmp_tbl,
1414 tx_resp_rate.index, 1,
1415 i < retries ? 0 : legacy_success);
1416 }
1417
1418
1419 if (lq_sta->rs_state == RS_STATE_STAY_IN_COLUMN) {
1420 lq_sta->total_success += legacy_success;
1421 lq_sta->total_failed += retries + (1 - legacy_success);
1422 }
1423 }
1424
1425 lq_sta->last_rate_n_flags = lq_hwrate;
1426 IWL_DEBUG_RATE(mvm, "reduced txpower: %d\n", reduced_txp);
1427done:
1428
1429 if (sta->supp_rates[info->band])
1430 rs_rate_scale_perform(mvm, sta, lq_sta, tid, ndp);
1431}
1432
1433
1434
1435
1436static void rs_drv_mac80211_tx_status(void *mvm_r,
1437 struct ieee80211_supported_band *sband,
1438 struct ieee80211_sta *sta, void *priv_sta,
1439 struct sk_buff *skb)
1440{
1441 struct ieee80211_hdr *hdr = (struct ieee80211_hdr *)skb->data;
1442 struct iwl_op_mode *op_mode = mvm_r;
1443 struct iwl_mvm *mvm = IWL_OP_MODE_GET_MVM(op_mode);
1444 struct ieee80211_tx_info *info = IEEE80211_SKB_CB(skb);
1445
1446 if (!iwl_mvm_sta_from_mac80211(sta)->vif)
1447 return;
1448
1449 if (!ieee80211_is_data(hdr->frame_control) ||
1450 info->flags & IEEE80211_TX_CTL_NO_ACK)
1451 return;
1452
1453 iwl_mvm_rs_tx_status(mvm, sta, rs_get_tid(hdr), info,
1454 ieee80211_is_qos_nullfunc(hdr->frame_control));
1455}
1456
1457
1458
1459
1460
1461
1462
1463
1464
1465static void rs_set_stay_in_table(struct iwl_mvm *mvm, u8 is_legacy,
1466 struct iwl_lq_sta *lq_sta)
1467{
1468 IWL_DEBUG_RATE(mvm, "Moving to RS_STATE_STAY_IN_COLUMN\n");
1469 lq_sta->rs_state = RS_STATE_STAY_IN_COLUMN;
1470 if (is_legacy) {
1471 lq_sta->table_count_limit = IWL_MVM_RS_LEGACY_TABLE_COUNT;
1472 lq_sta->max_failure_limit = IWL_MVM_RS_LEGACY_FAILURE_LIMIT;
1473 lq_sta->max_success_limit = IWL_MVM_RS_LEGACY_SUCCESS_LIMIT;
1474 } else {
1475 lq_sta->table_count_limit = IWL_MVM_RS_NON_LEGACY_TABLE_COUNT;
1476 lq_sta->max_failure_limit = IWL_MVM_RS_NON_LEGACY_FAILURE_LIMIT;
1477 lq_sta->max_success_limit = IWL_MVM_RS_NON_LEGACY_SUCCESS_LIMIT;
1478 }
1479 lq_sta->table_count = 0;
1480 lq_sta->total_failed = 0;
1481 lq_sta->total_success = 0;
1482 lq_sta->flush_timer = jiffies;
1483 lq_sta->visited_columns = 0;
1484}
1485
1486static inline int rs_get_max_rate_from_mask(unsigned long rate_mask)
1487{
1488 if (rate_mask)
1489 return find_last_bit(&rate_mask, BITS_PER_LONG);
1490 return IWL_RATE_INVALID;
1491}
1492
1493static int rs_get_max_allowed_rate(struct iwl_lq_sta *lq_sta,
1494 const struct rs_tx_column *column)
1495{
1496 switch (column->mode) {
1497 case RS_LEGACY:
1498 return lq_sta->max_legacy_rate_idx;
1499 case RS_SISO:
1500 return lq_sta->max_siso_rate_idx;
1501 case RS_MIMO2:
1502 return lq_sta->max_mimo2_rate_idx;
1503 default:
1504 WARN_ON_ONCE(1);
1505 }
1506
1507 return lq_sta->max_legacy_rate_idx;
1508}
1509
1510static const u16 *rs_get_expected_tpt_table(struct iwl_lq_sta *lq_sta,
1511 const struct rs_tx_column *column,
1512 u32 bw)
1513{
1514
1515 const u16 (*ht_tbl_pointer)[IWL_RATE_COUNT];
1516
1517 if (WARN_ON_ONCE(column->mode != RS_LEGACY &&
1518 column->mode != RS_SISO &&
1519 column->mode != RS_MIMO2))
1520 return expected_tpt_legacy;
1521
1522
1523 if (column->mode == RS_LEGACY)
1524 return expected_tpt_legacy;
1525
1526 ht_tbl_pointer = expected_tpt_mimo2_20MHz;
1527
1528
1529
1530 if (column->mode == RS_SISO) {
1531 switch (bw) {
1532 case RATE_MCS_CHAN_WIDTH_20:
1533 ht_tbl_pointer = expected_tpt_siso_20MHz;
1534 break;
1535 case RATE_MCS_CHAN_WIDTH_40:
1536 ht_tbl_pointer = expected_tpt_siso_40MHz;
1537 break;
1538 case RATE_MCS_CHAN_WIDTH_80:
1539 ht_tbl_pointer = expected_tpt_siso_80MHz;
1540 break;
1541 case RATE_MCS_CHAN_WIDTH_160:
1542 ht_tbl_pointer = expected_tpt_siso_160MHz;
1543 break;
1544 default:
1545 WARN_ON_ONCE(1);
1546 }
1547 } else if (column->mode == RS_MIMO2) {
1548 switch (bw) {
1549 case RATE_MCS_CHAN_WIDTH_20:
1550 ht_tbl_pointer = expected_tpt_mimo2_20MHz;
1551 break;
1552 case RATE_MCS_CHAN_WIDTH_40:
1553 ht_tbl_pointer = expected_tpt_mimo2_40MHz;
1554 break;
1555 case RATE_MCS_CHAN_WIDTH_80:
1556 ht_tbl_pointer = expected_tpt_mimo2_80MHz;
1557 break;
1558 case RATE_MCS_CHAN_WIDTH_160:
1559 ht_tbl_pointer = expected_tpt_mimo2_160MHz;
1560 break;
1561 default:
1562 WARN_ON_ONCE(1);
1563 }
1564 } else {
1565 WARN_ON_ONCE(1);
1566 }
1567
1568 if (!column->sgi && !lq_sta->is_agg)
1569 return ht_tbl_pointer[0];
1570 else if (column->sgi && !lq_sta->is_agg)
1571 return ht_tbl_pointer[1];
1572 else if (!column->sgi && lq_sta->is_agg)
1573 return ht_tbl_pointer[2];
1574 else
1575 return ht_tbl_pointer[3];
1576}
1577
1578static void rs_set_expected_tpt_table(struct iwl_lq_sta *lq_sta,
1579 struct iwl_scale_tbl_info *tbl)
1580{
1581 struct rs_rate *rate = &tbl->rate;
1582 const struct rs_tx_column *column = &rs_tx_columns[tbl->column];
1583
1584 tbl->expected_tpt = rs_get_expected_tpt_table(lq_sta, column, rate->bw);
1585}
1586
1587static s32 rs_get_best_rate(struct iwl_mvm *mvm,
1588 struct iwl_lq_sta *lq_sta,
1589 struct iwl_scale_tbl_info *tbl,
1590 unsigned long rate_mask, s8 index)
1591{
1592 struct iwl_scale_tbl_info *active_tbl =
1593 &(lq_sta->lq_info[lq_sta->active_tbl]);
1594 s32 success_ratio = active_tbl->win[index].success_ratio;
1595 u16 expected_current_tpt = active_tbl->expected_tpt[index];
1596 const u16 *tpt_tbl = tbl->expected_tpt;
1597 u16 high_low;
1598 u32 target_tpt;
1599 int rate_idx;
1600
1601 if (success_ratio >= RS_PERCENT(IWL_MVM_RS_SR_NO_DECREASE)) {
1602 target_tpt = 100 * expected_current_tpt;
1603 IWL_DEBUG_RATE(mvm,
1604 "SR %d high. Find rate exceeding EXPECTED_CURRENT %d\n",
1605 success_ratio, target_tpt);
1606 } else {
1607 target_tpt = lq_sta->last_tpt;
1608 IWL_DEBUG_RATE(mvm,
1609 "SR %d not that good. Find rate exceeding ACTUAL_TPT %d\n",
1610 success_ratio, target_tpt);
1611 }
1612
1613 rate_idx = find_first_bit(&rate_mask, BITS_PER_LONG);
1614
1615 while (rate_idx != IWL_RATE_INVALID) {
1616 if (target_tpt < (100 * tpt_tbl[rate_idx]))
1617 break;
1618
1619 high_low = rs_get_adjacent_rate(mvm, rate_idx, rate_mask,
1620 tbl->rate.type);
1621
1622 rate_idx = (high_low >> 8) & 0xff;
1623 }
1624
1625 IWL_DEBUG_RATE(mvm, "Best rate found %d target_tp %d expected_new %d\n",
1626 rate_idx, target_tpt,
1627 rate_idx != IWL_RATE_INVALID ?
1628 100 * tpt_tbl[rate_idx] : IWL_INVALID_VALUE);
1629
1630 return rate_idx;
1631}
1632
1633static u32 rs_bw_from_sta_bw(struct ieee80211_sta *sta)
1634{
1635 struct ieee80211_sta_vht_cap *sta_vht_cap = &sta->vht_cap;
1636 struct ieee80211_vht_cap vht_cap = {
1637 .vht_cap_info = cpu_to_le32(sta_vht_cap->cap),
1638 .supp_mcs = sta_vht_cap->vht_mcs,
1639 };
1640
1641 switch (sta->bandwidth) {
1642 case IEEE80211_STA_RX_BW_160:
1643
1644
1645
1646
1647
1648
1649
1650
1651 if (ieee80211_get_vht_max_nss(&vht_cap,
1652 IEEE80211_VHT_CHANWIDTH_160MHZ,
1653 0, true) < sta->rx_nss)
1654 return RATE_MCS_CHAN_WIDTH_80;
1655 return RATE_MCS_CHAN_WIDTH_160;
1656 case IEEE80211_STA_RX_BW_80:
1657 return RATE_MCS_CHAN_WIDTH_80;
1658 case IEEE80211_STA_RX_BW_40:
1659 return RATE_MCS_CHAN_WIDTH_40;
1660 case IEEE80211_STA_RX_BW_20:
1661 default:
1662 return RATE_MCS_CHAN_WIDTH_20;
1663 }
1664}
1665
1666
1667
1668
1669
1670
1671
1672
1673static void rs_stay_in_table(struct iwl_lq_sta *lq_sta, bool force_search)
1674{
1675 struct iwl_scale_tbl_info *tbl;
1676 int active_tbl;
1677 int flush_interval_passed = 0;
1678 struct iwl_mvm *mvm;
1679
1680 mvm = lq_sta->pers.drv;
1681 active_tbl = lq_sta->active_tbl;
1682
1683 tbl = &(lq_sta->lq_info[active_tbl]);
1684
1685
1686 if (lq_sta->rs_state == RS_STATE_STAY_IN_COLUMN) {
1687
1688 if (lq_sta->flush_timer)
1689 flush_interval_passed =
1690 time_after(jiffies,
1691 (unsigned long)(lq_sta->flush_timer +
1692 (IWL_MVM_RS_STAY_IN_COLUMN_TIMEOUT * HZ)));
1693
1694
1695
1696
1697
1698
1699
1700
1701
1702 if (force_search ||
1703 (lq_sta->total_failed > lq_sta->max_failure_limit) ||
1704 (lq_sta->total_success > lq_sta->max_success_limit) ||
1705 ((!lq_sta->search_better_tbl) &&
1706 (lq_sta->flush_timer) && (flush_interval_passed))) {
1707 IWL_DEBUG_RATE(mvm,
1708 "LQ: stay is expired %d %d %d\n",
1709 lq_sta->total_failed,
1710 lq_sta->total_success,
1711 flush_interval_passed);
1712
1713
1714 lq_sta->rs_state = RS_STATE_SEARCH_CYCLE_STARTED;
1715 IWL_DEBUG_RATE(mvm,
1716 "Moving to RS_STATE_SEARCH_CYCLE_STARTED\n");
1717 lq_sta->total_failed = 0;
1718 lq_sta->total_success = 0;
1719 lq_sta->flush_timer = 0;
1720
1721 lq_sta->visited_columns = BIT(tbl->column);
1722
1723
1724
1725
1726
1727
1728 } else {
1729 lq_sta->table_count++;
1730 if (lq_sta->table_count >=
1731 lq_sta->table_count_limit) {
1732 lq_sta->table_count = 0;
1733
1734 IWL_DEBUG_RATE(mvm,
1735 "LQ: stay in table clear win\n");
1736 rs_rate_scale_clear_tbl_windows(mvm, tbl);
1737 }
1738 }
1739
1740
1741
1742
1743 if (lq_sta->rs_state == RS_STATE_SEARCH_CYCLE_STARTED) {
1744 rs_rate_scale_clear_tbl_windows(mvm, tbl);
1745 }
1746 }
1747}
1748
1749static void rs_set_amsdu_len(struct iwl_mvm *mvm, struct ieee80211_sta *sta,
1750 struct iwl_scale_tbl_info *tbl,
1751 enum rs_action scale_action)
1752{
1753 struct iwl_mvm_sta *mvmsta = iwl_mvm_sta_from_mac80211(sta);
1754 int i;
1755
1756
1757
1758
1759
1760 if ((!is_vht(&tbl->rate) && !is_ht(&tbl->rate)) ||
1761 tbl->rate.index < IWL_RATE_MCS_5_INDEX ||
1762 scale_action == RS_ACTION_DOWNSCALE)
1763 mvmsta->amsdu_enabled = 0;
1764 else
1765 mvmsta->amsdu_enabled = 0xFFFF;
1766
1767 if (mvmsta->vif->bss_conf.he_support &&
1768 !iwlwifi_mod_params.disable_11ax)
1769 mvmsta->max_amsdu_len = sta->max_amsdu_len;
1770 else
1771 mvmsta->max_amsdu_len = min_t(int, sta->max_amsdu_len, 8500);
1772
1773 sta->max_rc_amsdu_len = mvmsta->max_amsdu_len;
1774
1775 for (i = 0; i < IWL_MAX_TID_COUNT; i++) {
1776 if (mvmsta->amsdu_enabled)
1777 sta->max_tid_amsdu_len[i] =
1778 iwl_mvm_max_amsdu_size(mvm, sta, i);
1779 else
1780
1781
1782
1783
1784 sta->max_tid_amsdu_len[i] = 1;
1785 }
1786}
1787
1788
1789
1790
1791static void rs_update_rate_tbl(struct iwl_mvm *mvm,
1792 struct ieee80211_sta *sta,
1793 struct iwl_lq_sta *lq_sta,
1794 struct iwl_scale_tbl_info *tbl)
1795{
1796 rs_fill_lq_cmd(mvm, sta, lq_sta, &tbl->rate);
1797 iwl_mvm_send_lq_cmd(mvm, &lq_sta->lq, false);
1798}
1799
1800static bool rs_tweak_rate_tbl(struct iwl_mvm *mvm,
1801 struct ieee80211_sta *sta,
1802 struct iwl_lq_sta *lq_sta,
1803 struct iwl_scale_tbl_info *tbl,
1804 enum rs_action scale_action)
1805{
1806 if (rs_bw_from_sta_bw(sta) != RATE_MCS_CHAN_WIDTH_80)
1807 return false;
1808
1809 if (!is_vht_siso(&tbl->rate))
1810 return false;
1811
1812 if ((tbl->rate.bw == RATE_MCS_CHAN_WIDTH_80) &&
1813 (tbl->rate.index == IWL_RATE_MCS_0_INDEX) &&
1814 (scale_action == RS_ACTION_DOWNSCALE)) {
1815 tbl->rate.bw = RATE_MCS_CHAN_WIDTH_20;
1816 tbl->rate.index = IWL_RATE_MCS_4_INDEX;
1817 IWL_DEBUG_RATE(mvm, "Switch 80Mhz SISO MCS0 -> 20Mhz MCS4\n");
1818 goto tweaked;
1819 }
1820
1821
1822
1823
1824
1825
1826 if ((tbl->rate.bw == RATE_MCS_CHAN_WIDTH_20) &&
1827 (((tbl->rate.index == IWL_RATE_MCS_5_INDEX) &&
1828 (scale_action == RS_ACTION_STAY)) ||
1829 ((tbl->rate.index > IWL_RATE_MCS_5_INDEX) &&
1830 (scale_action == RS_ACTION_UPSCALE)))) {
1831 tbl->rate.bw = RATE_MCS_CHAN_WIDTH_80;
1832 tbl->rate.index = IWL_RATE_MCS_1_INDEX;
1833 IWL_DEBUG_RATE(mvm, "Switch 20Mhz SISO MCS5 -> 80Mhz MCS1\n");
1834 goto tweaked;
1835 }
1836
1837 return false;
1838
1839tweaked:
1840 rs_set_expected_tpt_table(lq_sta, tbl);
1841 rs_rate_scale_clear_tbl_windows(mvm, tbl);
1842 return true;
1843}
1844
1845static enum rs_column rs_get_next_column(struct iwl_mvm *mvm,
1846 struct iwl_lq_sta *lq_sta,
1847 struct ieee80211_sta *sta,
1848 struct iwl_scale_tbl_info *tbl)
1849{
1850 int i, j, max_rate;
1851 enum rs_column next_col_id;
1852 const struct rs_tx_column *curr_col = &rs_tx_columns[tbl->column];
1853 const struct rs_tx_column *next_col;
1854 allow_column_func_t allow_func;
1855 u8 valid_ants = iwl_mvm_get_valid_tx_ant(mvm);
1856 const u16 *expected_tpt_tbl;
1857 u16 tpt, max_expected_tpt;
1858
1859 for (i = 0; i < MAX_NEXT_COLUMNS; i++) {
1860 next_col_id = curr_col->next_columns[i];
1861
1862 if (next_col_id == RS_COLUMN_INVALID)
1863 continue;
1864
1865 if (lq_sta->visited_columns & BIT(next_col_id)) {
1866 IWL_DEBUG_RATE(mvm, "Skip already visited column %d\n",
1867 next_col_id);
1868 continue;
1869 }
1870
1871 next_col = &rs_tx_columns[next_col_id];
1872
1873 if (!rs_is_valid_ant(valid_ants, next_col->ant)) {
1874 IWL_DEBUG_RATE(mvm,
1875 "Skip column %d as ANT config isn't supported by chip. valid_ants 0x%x column ant 0x%x\n",
1876 next_col_id, valid_ants, next_col->ant);
1877 continue;
1878 }
1879
1880 for (j = 0; j < MAX_COLUMN_CHECKS; j++) {
1881 allow_func = next_col->checks[j];
1882 if (allow_func && !allow_func(mvm, sta, &tbl->rate,
1883 next_col))
1884 break;
1885 }
1886
1887 if (j != MAX_COLUMN_CHECKS) {
1888 IWL_DEBUG_RATE(mvm,
1889 "Skip column %d: not allowed (check %d failed)\n",
1890 next_col_id, j);
1891
1892 continue;
1893 }
1894
1895 tpt = lq_sta->last_tpt / 100;
1896 expected_tpt_tbl = rs_get_expected_tpt_table(lq_sta, next_col,
1897 rs_bw_from_sta_bw(sta));
1898 if (WARN_ON_ONCE(!expected_tpt_tbl))
1899 continue;
1900
1901 max_rate = rs_get_max_allowed_rate(lq_sta, next_col);
1902 if (max_rate == IWL_RATE_INVALID) {
1903 IWL_DEBUG_RATE(mvm,
1904 "Skip column %d: no rate is allowed in this column\n",
1905 next_col_id);
1906 continue;
1907 }
1908
1909 max_expected_tpt = expected_tpt_tbl[max_rate];
1910 if (tpt >= max_expected_tpt) {
1911 IWL_DEBUG_RATE(mvm,
1912 "Skip column %d: can't beat current TPT. Max expected %d current %d\n",
1913 next_col_id, max_expected_tpt, tpt);
1914 continue;
1915 }
1916
1917 IWL_DEBUG_RATE(mvm,
1918 "Found potential column %d. Max expected %d current %d\n",
1919 next_col_id, max_expected_tpt, tpt);
1920 break;
1921 }
1922
1923 if (i == MAX_NEXT_COLUMNS)
1924 return RS_COLUMN_INVALID;
1925
1926 return next_col_id;
1927}
1928
1929static int rs_switch_to_column(struct iwl_mvm *mvm,
1930 struct iwl_lq_sta *lq_sta,
1931 struct ieee80211_sta *sta,
1932 enum rs_column col_id)
1933{
1934 struct iwl_scale_tbl_info *tbl = &(lq_sta->lq_info[lq_sta->active_tbl]);
1935 struct iwl_scale_tbl_info *search_tbl =
1936 &(lq_sta->lq_info[(1 - lq_sta->active_tbl)]);
1937 struct rs_rate *rate = &search_tbl->rate;
1938 const struct rs_tx_column *column = &rs_tx_columns[col_id];
1939 const struct rs_tx_column *curr_column = &rs_tx_columns[tbl->column];
1940 unsigned long rate_mask = 0;
1941 u32 rate_idx = 0;
1942
1943 memcpy(search_tbl, tbl, offsetof(struct iwl_scale_tbl_info, win));
1944
1945 rate->sgi = column->sgi;
1946 rate->ant = column->ant;
1947
1948 if (column->mode == RS_LEGACY) {
1949 if (lq_sta->band == NL80211_BAND_5GHZ)
1950 rate->type = LQ_LEGACY_A;
1951 else
1952 rate->type = LQ_LEGACY_G;
1953
1954 rate->bw = RATE_MCS_CHAN_WIDTH_20;
1955 rate->ldpc = false;
1956 rate_mask = lq_sta->active_legacy_rate;
1957 } else if (column->mode == RS_SISO) {
1958 rate->type = lq_sta->is_vht ? LQ_VHT_SISO : LQ_HT_SISO;
1959 rate_mask = lq_sta->active_siso_rate;
1960 } else if (column->mode == RS_MIMO2) {
1961 rate->type = lq_sta->is_vht ? LQ_VHT_MIMO2 : LQ_HT_MIMO2;
1962 rate_mask = lq_sta->active_mimo2_rate;
1963 } else {
1964 WARN_ONCE(1, "Bad column mode");
1965 }
1966
1967 if (column->mode != RS_LEGACY) {
1968 rate->bw = rs_bw_from_sta_bw(sta);
1969 rate->ldpc = lq_sta->ldpc;
1970 }
1971
1972 search_tbl->column = col_id;
1973 rs_set_expected_tpt_table(lq_sta, search_tbl);
1974
1975 lq_sta->visited_columns |= BIT(col_id);
1976
1977
1978
1979
1980 if (curr_column->mode != column->mode) {
1981 rate_idx = rs_get_best_rate(mvm, lq_sta, search_tbl,
1982 rate_mask, rate->index);
1983
1984 if ((rate_idx == IWL_RATE_INVALID) ||
1985 !(BIT(rate_idx) & rate_mask)) {
1986 IWL_DEBUG_RATE(mvm,
1987 "can not switch with index %d"
1988 " rate mask %lx\n",
1989 rate_idx, rate_mask);
1990
1991 goto err;
1992 }
1993
1994 rate->index = rate_idx;
1995 }
1996
1997 IWL_DEBUG_RATE(mvm, "Switched to column %d: Index %d\n",
1998 col_id, rate->index);
1999
2000 return 0;
2001
2002err:
2003 rate->type = LQ_NONE;
2004 return -1;
2005}
2006
2007static enum rs_action rs_get_rate_action(struct iwl_mvm *mvm,
2008 struct iwl_scale_tbl_info *tbl,
2009 s32 sr, int low, int high,
2010 int current_tpt,
2011 int low_tpt, int high_tpt)
2012{
2013 enum rs_action action = RS_ACTION_STAY;
2014
2015 if ((sr <= RS_PERCENT(IWL_MVM_RS_SR_FORCE_DECREASE)) ||
2016 (current_tpt == 0)) {
2017 IWL_DEBUG_RATE(mvm,
2018 "Decrease rate because of low SR\n");
2019 return RS_ACTION_DOWNSCALE;
2020 }
2021
2022 if ((low_tpt == IWL_INVALID_VALUE) &&
2023 (high_tpt == IWL_INVALID_VALUE) &&
2024 (high != IWL_RATE_INVALID)) {
2025 IWL_DEBUG_RATE(mvm,
2026 "No data about high/low rates. Increase rate\n");
2027 return RS_ACTION_UPSCALE;
2028 }
2029
2030 if ((high_tpt == IWL_INVALID_VALUE) &&
2031 (high != IWL_RATE_INVALID) &&
2032 (low_tpt != IWL_INVALID_VALUE) &&
2033 (low_tpt < current_tpt)) {
2034 IWL_DEBUG_RATE(mvm,
2035 "No data about high rate and low rate is worse. Increase rate\n");
2036 return RS_ACTION_UPSCALE;
2037 }
2038
2039 if ((high_tpt != IWL_INVALID_VALUE) &&
2040 (high_tpt > current_tpt)) {
2041 IWL_DEBUG_RATE(mvm,
2042 "Higher rate is better. Increate rate\n");
2043 return RS_ACTION_UPSCALE;
2044 }
2045
2046 if ((low_tpt != IWL_INVALID_VALUE) &&
2047 (high_tpt != IWL_INVALID_VALUE) &&
2048 (low_tpt < current_tpt) &&
2049 (high_tpt < current_tpt)) {
2050 IWL_DEBUG_RATE(mvm,
2051 "Both high and low are worse. Maintain rate\n");
2052 return RS_ACTION_STAY;
2053 }
2054
2055 if ((low_tpt != IWL_INVALID_VALUE) &&
2056 (low_tpt > current_tpt)) {
2057 IWL_DEBUG_RATE(mvm,
2058 "Lower rate is better\n");
2059 action = RS_ACTION_DOWNSCALE;
2060 goto out;
2061 }
2062
2063 if ((low_tpt == IWL_INVALID_VALUE) &&
2064 (low != IWL_RATE_INVALID)) {
2065 IWL_DEBUG_RATE(mvm,
2066 "No data about lower rate\n");
2067 action = RS_ACTION_DOWNSCALE;
2068 goto out;
2069 }
2070
2071 IWL_DEBUG_RATE(mvm, "Maintain rate\n");
2072
2073out:
2074 if ((action == RS_ACTION_DOWNSCALE) && (low != IWL_RATE_INVALID)) {
2075 if (sr >= RS_PERCENT(IWL_MVM_RS_SR_NO_DECREASE)) {
2076 IWL_DEBUG_RATE(mvm,
2077 "SR is above NO DECREASE. Avoid downscale\n");
2078 action = RS_ACTION_STAY;
2079 } else if (current_tpt > (100 * tbl->expected_tpt[low])) {
2080 IWL_DEBUG_RATE(mvm,
2081 "Current TPT is higher than max expected in low rate. Avoid downscale\n");
2082 action = RS_ACTION_STAY;
2083 } else {
2084 IWL_DEBUG_RATE(mvm, "Decrease rate\n");
2085 }
2086 }
2087
2088 return action;
2089}
2090
2091static bool rs_stbc_allow(struct iwl_mvm *mvm, struct ieee80211_sta *sta,
2092 struct iwl_lq_sta *lq_sta)
2093{
2094
2095
2096
2097 if (!lq_sta->stbc_capable)
2098 return false;
2099
2100 if (!iwl_mvm_bt_coex_is_mimo_allowed(mvm, sta))
2101 return false;
2102
2103 return true;
2104}
2105
2106static void rs_get_adjacent_txp(struct iwl_mvm *mvm, int index,
2107 int *weaker, int *stronger)
2108{
2109 *weaker = index + IWL_MVM_RS_TPC_TX_POWER_STEP;
2110 if (*weaker > TPC_MAX_REDUCTION)
2111 *weaker = TPC_INVALID;
2112
2113 *stronger = index - IWL_MVM_RS_TPC_TX_POWER_STEP;
2114 if (*stronger < 0)
2115 *stronger = TPC_INVALID;
2116}
2117
2118static bool rs_tpc_allowed(struct iwl_mvm *mvm, struct ieee80211_vif *vif,
2119 struct rs_rate *rate, enum nl80211_band band)
2120{
2121 int index = rate->index;
2122 bool cam = (iwlmvm_mod_params.power_scheme == IWL_POWER_SCHEME_CAM);
2123 bool sta_ps_disabled = (vif->type == NL80211_IFTYPE_STATION &&
2124 !vif->bss_conf.ps);
2125
2126 IWL_DEBUG_RATE(mvm, "cam: %d sta_ps_disabled %d\n",
2127 cam, sta_ps_disabled);
2128
2129
2130
2131
2132 if ((cam || sta_ps_disabled) &&
2133 !iwl_mvm_bt_coex_is_tpc_allowed(mvm, band))
2134 return false;
2135
2136 IWL_DEBUG_RATE(mvm, "check rate, table type: %d\n", rate->type);
2137 if (is_legacy(rate))
2138 return index == IWL_RATE_54M_INDEX;
2139 if (is_ht(rate))
2140 return index == IWL_RATE_MCS_7_INDEX;
2141 if (is_vht(rate))
2142 return index == IWL_RATE_MCS_7_INDEX ||
2143 index == IWL_RATE_MCS_8_INDEX ||
2144 index == IWL_RATE_MCS_9_INDEX;
2145
2146 WARN_ON_ONCE(1);
2147 return false;
2148}
2149
2150enum tpc_action {
2151 TPC_ACTION_STAY,
2152 TPC_ACTION_DECREASE,
2153 TPC_ACTION_INCREASE,
2154 TPC_ACTION_NO_RESTIRCTION,
2155};
2156
2157static enum tpc_action rs_get_tpc_action(struct iwl_mvm *mvm,
2158 s32 sr, int weak, int strong,
2159 int current_tpt,
2160 int weak_tpt, int strong_tpt)
2161{
2162
2163 if (current_tpt == IWL_INVALID_VALUE) {
2164 IWL_DEBUG_RATE(mvm, "no current tpt. stay.\n");
2165 return TPC_ACTION_STAY;
2166 }
2167
2168
2169 if (sr <= RS_PERCENT(IWL_MVM_RS_TPC_SR_FORCE_INCREASE) ||
2170 current_tpt == 0) {
2171 IWL_DEBUG_RATE(mvm, "increase txp because of weak SR\n");
2172 return TPC_ACTION_NO_RESTIRCTION;
2173 }
2174
2175
2176 if (sr >= RS_PERCENT(IWL_MVM_RS_TPC_SR_NO_INCREASE) &&
2177 weak != TPC_INVALID) {
2178 if (weak_tpt == IWL_INVALID_VALUE &&
2179 (strong_tpt == IWL_INVALID_VALUE ||
2180 current_tpt >= strong_tpt)) {
2181 IWL_DEBUG_RATE(mvm,
2182 "no weak txp measurement. decrease txp\n");
2183 return TPC_ACTION_DECREASE;
2184 }
2185
2186 if (weak_tpt > current_tpt) {
2187 IWL_DEBUG_RATE(mvm,
2188 "lower txp has better tpt. decrease txp\n");
2189 return TPC_ACTION_DECREASE;
2190 }
2191 }
2192
2193
2194 if (sr < RS_PERCENT(IWL_MVM_RS_TPC_SR_NO_INCREASE) &&
2195 strong != TPC_INVALID) {
2196 if (weak_tpt == IWL_INVALID_VALUE &&
2197 strong_tpt != IWL_INVALID_VALUE &&
2198 current_tpt < strong_tpt) {
2199 IWL_DEBUG_RATE(mvm,
2200 "higher txp has better tpt. increase txp\n");
2201 return TPC_ACTION_INCREASE;
2202 }
2203
2204 if (weak_tpt < current_tpt &&
2205 (strong_tpt == IWL_INVALID_VALUE ||
2206 strong_tpt > current_tpt)) {
2207 IWL_DEBUG_RATE(mvm,
2208 "lower txp has worse tpt. increase txp\n");
2209 return TPC_ACTION_INCREASE;
2210 }
2211 }
2212
2213 IWL_DEBUG_RATE(mvm, "no need to increase or decrease txp - stay\n");
2214 return TPC_ACTION_STAY;
2215}
2216
2217static bool rs_tpc_perform(struct iwl_mvm *mvm,
2218 struct ieee80211_sta *sta,
2219 struct iwl_lq_sta *lq_sta,
2220 struct iwl_scale_tbl_info *tbl)
2221{
2222 struct iwl_mvm_sta *mvm_sta = iwl_mvm_sta_from_mac80211(sta);
2223 struct ieee80211_vif *vif = mvm_sta->vif;
2224 struct ieee80211_chanctx_conf *chanctx_conf;
2225 enum nl80211_band band;
2226 struct iwl_rate_scale_data *window;
2227 struct rs_rate *rate = &tbl->rate;
2228 enum tpc_action action;
2229 s32 sr;
2230 u8 cur = lq_sta->lq.reduced_tpc;
2231 int current_tpt;
2232 int weak, strong;
2233 int weak_tpt = IWL_INVALID_VALUE, strong_tpt = IWL_INVALID_VALUE;
2234
2235#ifdef CONFIG_MAC80211_DEBUGFS
2236 if (lq_sta->pers.dbg_fixed_txp_reduction <= TPC_MAX_REDUCTION) {
2237 IWL_DEBUG_RATE(mvm, "fixed tpc: %d\n",
2238 lq_sta->pers.dbg_fixed_txp_reduction);
2239 lq_sta->lq.reduced_tpc = lq_sta->pers.dbg_fixed_txp_reduction;
2240 return cur != lq_sta->pers.dbg_fixed_txp_reduction;
2241 }
2242#endif
2243
2244 rcu_read_lock();
2245 chanctx_conf = rcu_dereference(vif->chanctx_conf);
2246 if (WARN_ON(!chanctx_conf))
2247 band = NUM_NL80211_BANDS;
2248 else
2249 band = chanctx_conf->def.chan->band;
2250 rcu_read_unlock();
2251
2252 if (!rs_tpc_allowed(mvm, vif, rate, band)) {
2253 IWL_DEBUG_RATE(mvm,
2254 "tpc is not allowed. remove txp restrictions\n");
2255 lq_sta->lq.reduced_tpc = TPC_NO_REDUCTION;
2256 return cur != TPC_NO_REDUCTION;
2257 }
2258
2259 rs_get_adjacent_txp(mvm, cur, &weak, &strong);
2260
2261
2262 window = tbl->tpc_win;
2263 sr = window[cur].success_ratio;
2264 current_tpt = window[cur].average_tpt;
2265 if (weak != TPC_INVALID)
2266 weak_tpt = window[weak].average_tpt;
2267 if (strong != TPC_INVALID)
2268 strong_tpt = window[strong].average_tpt;
2269
2270 IWL_DEBUG_RATE(mvm,
2271 "(TPC: %d): cur_tpt %d SR %d weak %d strong %d weak_tpt %d strong_tpt %d\n",
2272 cur, current_tpt, sr, weak, strong,
2273 weak_tpt, strong_tpt);
2274
2275 action = rs_get_tpc_action(mvm, sr, weak, strong,
2276 current_tpt, weak_tpt, strong_tpt);
2277
2278
2279 if (weak == TPC_INVALID && action == TPC_ACTION_DECREASE) {
2280 IWL_DEBUG_RATE(mvm, "already in lowest txp, stay\n");
2281 action = TPC_ACTION_STAY;
2282 } else if (strong == TPC_INVALID &&
2283 (action == TPC_ACTION_INCREASE ||
2284 action == TPC_ACTION_NO_RESTIRCTION)) {
2285 IWL_DEBUG_RATE(mvm, "already in highest txp, stay\n");
2286 action = TPC_ACTION_STAY;
2287 }
2288
2289 switch (action) {
2290 case TPC_ACTION_DECREASE:
2291 lq_sta->lq.reduced_tpc = weak;
2292 return true;
2293 case TPC_ACTION_INCREASE:
2294 lq_sta->lq.reduced_tpc = strong;
2295 return true;
2296 case TPC_ACTION_NO_RESTIRCTION:
2297 lq_sta->lq.reduced_tpc = TPC_NO_REDUCTION;
2298 return true;
2299 case TPC_ACTION_STAY:
2300
2301 break;
2302 }
2303 return false;
2304}
2305
2306
2307
2308
2309static void rs_rate_scale_perform(struct iwl_mvm *mvm,
2310 struct ieee80211_sta *sta,
2311 struct iwl_lq_sta *lq_sta,
2312 int tid, bool ndp)
2313{
2314 int low = IWL_RATE_INVALID;
2315 int high = IWL_RATE_INVALID;
2316 int index;
2317 struct iwl_rate_scale_data *window = NULL;
2318 int current_tpt = IWL_INVALID_VALUE;
2319 int low_tpt = IWL_INVALID_VALUE;
2320 int high_tpt = IWL_INVALID_VALUE;
2321 u32 fail_count;
2322 enum rs_action scale_action = RS_ACTION_STAY;
2323 u16 rate_mask;
2324 u8 update_lq = 0;
2325 struct iwl_scale_tbl_info *tbl, *tbl1;
2326 u8 active_tbl = 0;
2327 u8 done_search = 0;
2328 u16 high_low;
2329 s32 sr;
2330 u8 prev_agg = lq_sta->is_agg;
2331 struct iwl_mvm_sta *mvmsta = iwl_mvm_sta_from_mac80211(sta);
2332 struct rs_rate *rate;
2333
2334 lq_sta->is_agg = !!mvmsta->agg_tids;
2335
2336
2337
2338
2339
2340
2341 if (!lq_sta->search_better_tbl)
2342 active_tbl = lq_sta->active_tbl;
2343 else
2344 active_tbl = 1 - lq_sta->active_tbl;
2345
2346 tbl = &(lq_sta->lq_info[active_tbl]);
2347 rate = &tbl->rate;
2348
2349 if (prev_agg != lq_sta->is_agg) {
2350 IWL_DEBUG_RATE(mvm,
2351 "Aggregation changed: prev %d current %d. Update expected TPT table\n",
2352 prev_agg, lq_sta->is_agg);
2353 rs_set_expected_tpt_table(lq_sta, tbl);
2354 rs_rate_scale_clear_tbl_windows(mvm, tbl);
2355 }
2356
2357
2358 index = rate->index;
2359
2360
2361 rate_mask = rs_get_supported_rates(lq_sta, rate);
2362
2363 if (!(BIT(index) & rate_mask)) {
2364 IWL_ERR(mvm, "Current Rate is not valid\n");
2365 if (lq_sta->search_better_tbl) {
2366
2367 rate->type = LQ_NONE;
2368 lq_sta->search_better_tbl = 0;
2369 tbl = &(lq_sta->lq_info[lq_sta->active_tbl]);
2370 rs_update_rate_tbl(mvm, sta, lq_sta, tbl);
2371 }
2372 return;
2373 }
2374
2375
2376 if (!tbl->expected_tpt) {
2377 IWL_ERR(mvm, "tbl->expected_tpt is NULL\n");
2378 return;
2379 }
2380
2381
2382 window = &(tbl->win[index]);
2383
2384
2385
2386
2387
2388
2389
2390
2391 fail_count = window->counter - window->success_counter;
2392 if ((fail_count < IWL_MVM_RS_RATE_MIN_FAILURE_TH) &&
2393 (window->success_counter < IWL_MVM_RS_RATE_MIN_SUCCESS_TH)) {
2394 IWL_DEBUG_RATE(mvm,
2395 "%s: Test Window: succ %d total %d\n",
2396 rs_pretty_rate(rate),
2397 window->success_counter, window->counter);
2398
2399
2400 window->average_tpt = IWL_INVALID_VALUE;
2401
2402
2403
2404 rs_stay_in_table(lq_sta, false);
2405
2406 return;
2407 }
2408
2409
2410 if (lq_sta->search_better_tbl) {
2411
2412
2413
2414 if (window->average_tpt > lq_sta->last_tpt) {
2415 IWL_DEBUG_RATE(mvm,
2416 "SWITCHING TO NEW TABLE SR: %d "
2417 "cur-tpt %d old-tpt %d\n",
2418 window->success_ratio,
2419 window->average_tpt,
2420 lq_sta->last_tpt);
2421
2422
2423 lq_sta->active_tbl = active_tbl;
2424 current_tpt = window->average_tpt;
2425
2426 } else {
2427 IWL_DEBUG_RATE(mvm,
2428 "GOING BACK TO THE OLD TABLE: SR %d "
2429 "cur-tpt %d old-tpt %d\n",
2430 window->success_ratio,
2431 window->average_tpt,
2432 lq_sta->last_tpt);
2433
2434
2435 rate->type = LQ_NONE;
2436
2437
2438 active_tbl = lq_sta->active_tbl;
2439 tbl = &(lq_sta->lq_info[active_tbl]);
2440
2441
2442 index = tbl->rate.index;
2443 current_tpt = lq_sta->last_tpt;
2444
2445
2446 update_lq = 1;
2447 }
2448
2449
2450
2451 lq_sta->search_better_tbl = 0;
2452 done_search = 1;
2453 goto lq_update;
2454 }
2455
2456
2457
2458 high_low = rs_get_adjacent_rate(mvm, index, rate_mask, rate->type);
2459 low = high_low & 0xff;
2460 high = (high_low >> 8) & 0xff;
2461
2462
2463
2464 sr = window->success_ratio;
2465
2466
2467 current_tpt = window->average_tpt;
2468 if (low != IWL_RATE_INVALID)
2469 low_tpt = tbl->win[low].average_tpt;
2470 if (high != IWL_RATE_INVALID)
2471 high_tpt = tbl->win[high].average_tpt;
2472
2473 IWL_DEBUG_RATE(mvm,
2474 "%s: cur_tpt %d SR %d low %d high %d low_tpt %d high_tpt %d\n",
2475 rs_pretty_rate(rate), current_tpt, sr,
2476 low, high, low_tpt, high_tpt);
2477
2478 scale_action = rs_get_rate_action(mvm, tbl, sr, low, high,
2479 current_tpt, low_tpt, high_tpt);
2480
2481
2482 if (is_mimo(rate) &&
2483 !iwl_mvm_bt_coex_is_mimo_allowed(mvm, sta)) {
2484 IWL_DEBUG_RATE(mvm,
2485 "BT Coex forbids MIMO. Search for new config\n");
2486 rs_stay_in_table(lq_sta, true);
2487 goto lq_update;
2488 }
2489
2490 switch (scale_action) {
2491 case RS_ACTION_DOWNSCALE:
2492
2493 if (low != IWL_RATE_INVALID) {
2494 update_lq = 1;
2495 index = low;
2496 } else {
2497 IWL_DEBUG_RATE(mvm,
2498 "At the bottom rate. Can't decrease\n");
2499 }
2500
2501 break;
2502 case RS_ACTION_UPSCALE:
2503
2504 if (high != IWL_RATE_INVALID) {
2505 update_lq = 1;
2506 index = high;
2507 } else {
2508 IWL_DEBUG_RATE(mvm,
2509 "At the top rate. Can't increase\n");
2510 }
2511
2512 break;
2513 case RS_ACTION_STAY:
2514
2515 if (lq_sta->rs_state == RS_STATE_STAY_IN_COLUMN)
2516 update_lq = rs_tpc_perform(mvm, sta, lq_sta, tbl);
2517 break;
2518 default:
2519 break;
2520 }
2521
2522lq_update:
2523
2524 if (update_lq) {
2525 tbl->rate.index = index;
2526 if (IWL_MVM_RS_80_20_FAR_RANGE_TWEAK)
2527 rs_tweak_rate_tbl(mvm, sta, lq_sta, tbl, scale_action);
2528 rs_set_amsdu_len(mvm, sta, tbl, scale_action);
2529 rs_update_rate_tbl(mvm, sta, lq_sta, tbl);
2530 }
2531
2532 rs_stay_in_table(lq_sta, false);
2533
2534
2535
2536
2537
2538
2539
2540 if (!update_lq && !done_search &&
2541 lq_sta->rs_state == RS_STATE_SEARCH_CYCLE_STARTED
2542 && window->counter) {
2543 enum rs_column next_column;
2544
2545
2546 lq_sta->last_tpt = current_tpt;
2547
2548 IWL_DEBUG_RATE(mvm,
2549 "Start Search: update_lq %d done_search %d rs_state %d win->counter %d\n",
2550 update_lq, done_search, lq_sta->rs_state,
2551 window->counter);
2552
2553 next_column = rs_get_next_column(mvm, lq_sta, sta, tbl);
2554 if (next_column != RS_COLUMN_INVALID) {
2555 int ret = rs_switch_to_column(mvm, lq_sta, sta,
2556 next_column);
2557 if (!ret)
2558 lq_sta->search_better_tbl = 1;
2559 } else {
2560 IWL_DEBUG_RATE(mvm,
2561 "No more columns to explore in search cycle. Go to RS_STATE_SEARCH_CYCLE_ENDED\n");
2562 lq_sta->rs_state = RS_STATE_SEARCH_CYCLE_ENDED;
2563 }
2564
2565
2566 if (lq_sta->search_better_tbl) {
2567
2568 tbl = &(lq_sta->lq_info[(1 - lq_sta->active_tbl)]);
2569 rs_rate_scale_clear_tbl_windows(mvm, tbl);
2570
2571
2572 index = tbl->rate.index;
2573
2574 rs_dump_rate(mvm, &tbl->rate,
2575 "Switch to SEARCH TABLE:");
2576 rs_update_rate_tbl(mvm, sta, lq_sta, tbl);
2577 } else {
2578 done_search = 1;
2579 }
2580 }
2581
2582 if (!ndp)
2583 rs_tl_turn_on_agg(mvm, mvmsta, tid, lq_sta, sta);
2584
2585 if (done_search && lq_sta->rs_state == RS_STATE_SEARCH_CYCLE_ENDED) {
2586 tbl1 = &(lq_sta->lq_info[lq_sta->active_tbl]);
2587 rs_set_stay_in_table(mvm, is_legacy(&tbl1->rate), lq_sta);
2588 }
2589}
2590
2591struct rs_init_rate_info {
2592 s8 rssi;
2593 u8 rate_idx;
2594};
2595
2596static const struct rs_init_rate_info rs_optimal_rates_24ghz_legacy[] = {
2597 { -60, IWL_RATE_54M_INDEX },
2598 { -64, IWL_RATE_48M_INDEX },
2599 { -68, IWL_RATE_36M_INDEX },
2600 { -80, IWL_RATE_24M_INDEX },
2601 { -84, IWL_RATE_18M_INDEX },
2602 { -85, IWL_RATE_12M_INDEX },
2603 { -86, IWL_RATE_11M_INDEX },
2604 { -88, IWL_RATE_5M_INDEX },
2605 { -90, IWL_RATE_2M_INDEX },
2606 { S8_MIN, IWL_RATE_1M_INDEX },
2607};
2608
2609static const struct rs_init_rate_info rs_optimal_rates_5ghz_legacy[] = {
2610 { -60, IWL_RATE_54M_INDEX },
2611 { -64, IWL_RATE_48M_INDEX },
2612 { -72, IWL_RATE_36M_INDEX },
2613 { -80, IWL_RATE_24M_INDEX },
2614 { -84, IWL_RATE_18M_INDEX },
2615 { -85, IWL_RATE_12M_INDEX },
2616 { -87, IWL_RATE_9M_INDEX },
2617 { S8_MIN, IWL_RATE_6M_INDEX },
2618};
2619
2620static const struct rs_init_rate_info rs_optimal_rates_ht[] = {
2621 { -60, IWL_RATE_MCS_7_INDEX },
2622 { -64, IWL_RATE_MCS_6_INDEX },
2623 { -68, IWL_RATE_MCS_5_INDEX },
2624 { -72, IWL_RATE_MCS_4_INDEX },
2625 { -80, IWL_RATE_MCS_3_INDEX },
2626 { -84, IWL_RATE_MCS_2_INDEX },
2627 { -85, IWL_RATE_MCS_1_INDEX },
2628 { S8_MIN, IWL_RATE_MCS_0_INDEX},
2629};
2630
2631
2632
2633
2634static const struct rs_init_rate_info rs_optimal_rates_vht_20mhz[] = {
2635 { -60, IWL_RATE_MCS_8_INDEX },
2636 { -64, IWL_RATE_MCS_7_INDEX },
2637 { -68, IWL_RATE_MCS_6_INDEX },
2638 { -72, IWL_RATE_MCS_5_INDEX },
2639 { -80, IWL_RATE_MCS_4_INDEX },
2640 { -84, IWL_RATE_MCS_3_INDEX },
2641 { -85, IWL_RATE_MCS_2_INDEX },
2642 { -87, IWL_RATE_MCS_1_INDEX },
2643 { S8_MIN, IWL_RATE_MCS_0_INDEX},
2644};
2645
2646static const struct rs_init_rate_info rs_optimal_rates_vht[] = {
2647 { -60, IWL_RATE_MCS_9_INDEX },
2648 { -64, IWL_RATE_MCS_8_INDEX },
2649 { -68, IWL_RATE_MCS_7_INDEX },
2650 { -72, IWL_RATE_MCS_6_INDEX },
2651 { -80, IWL_RATE_MCS_5_INDEX },
2652 { -84, IWL_RATE_MCS_4_INDEX },
2653 { -85, IWL_RATE_MCS_3_INDEX },
2654 { -87, IWL_RATE_MCS_2_INDEX },
2655 { -88, IWL_RATE_MCS_1_INDEX },
2656 { S8_MIN, IWL_RATE_MCS_0_INDEX },
2657};
2658
2659#define IWL_RS_LOW_RSSI_THRESHOLD (-76)
2660
2661
2662
2663
2664
2665static void rs_init_optimal_rate(struct iwl_mvm *mvm,
2666 struct ieee80211_sta *sta,
2667 struct iwl_lq_sta *lq_sta)
2668{
2669 struct rs_rate *rate = &lq_sta->optimal_rate;
2670
2671 if (lq_sta->max_mimo2_rate_idx != IWL_RATE_INVALID)
2672 rate->type = lq_sta->is_vht ? LQ_VHT_MIMO2 : LQ_HT_MIMO2;
2673 else if (lq_sta->max_siso_rate_idx != IWL_RATE_INVALID)
2674 rate->type = lq_sta->is_vht ? LQ_VHT_SISO : LQ_HT_SISO;
2675 else if (lq_sta->band == NL80211_BAND_5GHZ)
2676 rate->type = LQ_LEGACY_A;
2677 else
2678 rate->type = LQ_LEGACY_G;
2679
2680 rate->bw = rs_bw_from_sta_bw(sta);
2681 rate->sgi = rs_sgi_allow(mvm, sta, rate, NULL);
2682
2683
2684
2685 if (is_mimo(rate)) {
2686 lq_sta->optimal_rate_mask = lq_sta->active_mimo2_rate;
2687 } else if (is_siso(rate)) {
2688 lq_sta->optimal_rate_mask = lq_sta->active_siso_rate;
2689 } else {
2690 lq_sta->optimal_rate_mask = lq_sta->active_legacy_rate;
2691
2692 if (lq_sta->band == NL80211_BAND_5GHZ) {
2693 lq_sta->optimal_rates = rs_optimal_rates_5ghz_legacy;
2694 lq_sta->optimal_nentries =
2695 ARRAY_SIZE(rs_optimal_rates_5ghz_legacy);
2696 } else {
2697 lq_sta->optimal_rates = rs_optimal_rates_24ghz_legacy;
2698 lq_sta->optimal_nentries =
2699 ARRAY_SIZE(rs_optimal_rates_24ghz_legacy);
2700 }
2701 }
2702
2703 if (is_vht(rate)) {
2704 if (rate->bw == RATE_MCS_CHAN_WIDTH_20) {
2705 lq_sta->optimal_rates = rs_optimal_rates_vht_20mhz;
2706 lq_sta->optimal_nentries =
2707 ARRAY_SIZE(rs_optimal_rates_vht_20mhz);
2708 } else {
2709 lq_sta->optimal_rates = rs_optimal_rates_vht;
2710 lq_sta->optimal_nentries =
2711 ARRAY_SIZE(rs_optimal_rates_vht);
2712 }
2713 } else if (is_ht(rate)) {
2714 lq_sta->optimal_rates = rs_optimal_rates_ht;
2715 lq_sta->optimal_nentries = ARRAY_SIZE(rs_optimal_rates_ht);
2716 }
2717}
2718
2719
2720static struct rs_rate *rs_get_optimal_rate(struct iwl_mvm *mvm,
2721 struct iwl_lq_sta *lq_sta)
2722{
2723 struct rs_rate *rate = &lq_sta->optimal_rate;
2724 int i;
2725
2726 rate->index = find_first_bit(&lq_sta->optimal_rate_mask,
2727 BITS_PER_LONG);
2728
2729 for (i = 0; i < lq_sta->optimal_nentries; i++) {
2730 int rate_idx = lq_sta->optimal_rates[i].rate_idx;
2731
2732 if ((lq_sta->pers.last_rssi >= lq_sta->optimal_rates[i].rssi) &&
2733 (BIT(rate_idx) & lq_sta->optimal_rate_mask)) {
2734 rate->index = rate_idx;
2735 break;
2736 }
2737 }
2738
2739 return rate;
2740}
2741
2742
2743
2744
2745static void rs_get_initial_rate(struct iwl_mvm *mvm,
2746 struct ieee80211_sta *sta,
2747 struct iwl_lq_sta *lq_sta,
2748 enum nl80211_band band,
2749 struct rs_rate *rate)
2750{
2751 struct iwl_mvm_sta *mvmsta = iwl_mvm_sta_from_mac80211(sta);
2752 int i, nentries;
2753 unsigned long active_rate;
2754 s8 best_rssi = S8_MIN;
2755 u8 best_ant = ANT_NONE;
2756 u8 valid_tx_ant = iwl_mvm_get_valid_tx_ant(mvm);
2757 const struct rs_init_rate_info *initial_rates;
2758
2759 for (i = 0; i < ARRAY_SIZE(lq_sta->pers.chain_signal); i++) {
2760 if (!(lq_sta->pers.chains & BIT(i)))
2761 continue;
2762
2763 if (lq_sta->pers.chain_signal[i] > best_rssi) {
2764 best_rssi = lq_sta->pers.chain_signal[i];
2765 best_ant = BIT(i);
2766 }
2767 }
2768
2769 IWL_DEBUG_RATE(mvm, "Best ANT: %s Best RSSI: %d\n",
2770 rs_pretty_ant(best_ant), best_rssi);
2771
2772 if (best_ant != ANT_A && best_ant != ANT_B)
2773 rate->ant = first_antenna(valid_tx_ant);
2774 else
2775 rate->ant = best_ant;
2776
2777 rate->sgi = false;
2778 rate->ldpc = false;
2779 rate->bw = RATE_MCS_CHAN_WIDTH_20;
2780
2781 rate->index = find_first_bit(&lq_sta->active_legacy_rate,
2782 BITS_PER_LONG);
2783
2784 if (band == NL80211_BAND_5GHZ) {
2785 rate->type = LQ_LEGACY_A;
2786 initial_rates = rs_optimal_rates_5ghz_legacy;
2787 nentries = ARRAY_SIZE(rs_optimal_rates_5ghz_legacy);
2788 } else {
2789 rate->type = LQ_LEGACY_G;
2790 initial_rates = rs_optimal_rates_24ghz_legacy;
2791 nentries = ARRAY_SIZE(rs_optimal_rates_24ghz_legacy);
2792 }
2793
2794 if (!IWL_MVM_RS_RSSI_BASED_INIT_RATE)
2795 goto out;
2796
2797
2798
2799
2800
2801
2802 if (sta->vht_cap.vht_supported &&
2803 best_rssi > IWL_RS_LOW_RSSI_THRESHOLD) {
2804
2805
2806
2807
2808
2809
2810
2811
2812
2813 u32 bw = mvmsta->sta_state < IEEE80211_STA_AUTHORIZED ?
2814 RATE_MCS_CHAN_WIDTH_20 : rs_bw_from_sta_bw(sta);
2815
2816 switch (bw) {
2817 case RATE_MCS_CHAN_WIDTH_40:
2818 case RATE_MCS_CHAN_WIDTH_80:
2819 case RATE_MCS_CHAN_WIDTH_160:
2820 initial_rates = rs_optimal_rates_vht;
2821 nentries = ARRAY_SIZE(rs_optimal_rates_vht);
2822 break;
2823 case RATE_MCS_CHAN_WIDTH_20:
2824 initial_rates = rs_optimal_rates_vht_20mhz;
2825 nentries = ARRAY_SIZE(rs_optimal_rates_vht_20mhz);
2826 break;
2827 default:
2828 IWL_ERR(mvm, "Invalid BW %d\n", sta->bandwidth);
2829 goto out;
2830 }
2831
2832 active_rate = lq_sta->active_siso_rate;
2833 rate->type = LQ_VHT_SISO;
2834 rate->bw = bw;
2835 } else if (sta->ht_cap.ht_supported &&
2836 best_rssi > IWL_RS_LOW_RSSI_THRESHOLD) {
2837 initial_rates = rs_optimal_rates_ht;
2838 nentries = ARRAY_SIZE(rs_optimal_rates_ht);
2839 active_rate = lq_sta->active_siso_rate;
2840 rate->type = LQ_HT_SISO;
2841 } else {
2842 active_rate = lq_sta->active_legacy_rate;
2843 }
2844
2845 for (i = 0; i < nentries; i++) {
2846 int rate_idx = initial_rates[i].rate_idx;
2847
2848 if ((best_rssi >= initial_rates[i].rssi) &&
2849 (BIT(rate_idx) & active_rate)) {
2850 rate->index = rate_idx;
2851 break;
2852 }
2853 }
2854
2855out:
2856 rs_dump_rate(mvm, rate, "INITIAL");
2857}
2858
2859
2860void rs_update_last_rssi(struct iwl_mvm *mvm,
2861 struct iwl_mvm_sta *mvmsta,
2862 struct ieee80211_rx_status *rx_status)
2863{
2864 struct iwl_lq_sta *lq_sta = &mvmsta->lq_sta.rs_drv;
2865 int i;
2866
2867 lq_sta->pers.chains = rx_status->chains;
2868 lq_sta->pers.chain_signal[0] = rx_status->chain_signal[0];
2869 lq_sta->pers.chain_signal[1] = rx_status->chain_signal[1];
2870 lq_sta->pers.chain_signal[2] = rx_status->chain_signal[2];
2871 lq_sta->pers.last_rssi = S8_MIN;
2872
2873 for (i = 0; i < ARRAY_SIZE(lq_sta->pers.chain_signal); i++) {
2874 if (!(lq_sta->pers.chains & BIT(i)))
2875 continue;
2876
2877 if (lq_sta->pers.chain_signal[i] > lq_sta->pers.last_rssi)
2878 lq_sta->pers.last_rssi = lq_sta->pers.chain_signal[i];
2879 }
2880}
2881
2882
2883
2884
2885
2886
2887
2888
2889
2890
2891
2892
2893
2894
2895
2896static void rs_initialize_lq(struct iwl_mvm *mvm,
2897 struct ieee80211_sta *sta,
2898 struct iwl_lq_sta *lq_sta,
2899 enum nl80211_band band, bool update)
2900{
2901 struct iwl_scale_tbl_info *tbl;
2902 struct rs_rate *rate;
2903 u8 active_tbl = 0;
2904
2905 if (!sta || !lq_sta)
2906 return;
2907
2908 if (!lq_sta->search_better_tbl)
2909 active_tbl = lq_sta->active_tbl;
2910 else
2911 active_tbl = 1 - lq_sta->active_tbl;
2912
2913 tbl = &(lq_sta->lq_info[active_tbl]);
2914 rate = &tbl->rate;
2915
2916 rs_get_initial_rate(mvm, sta, lq_sta, band, rate);
2917 rs_init_optimal_rate(mvm, sta, lq_sta);
2918
2919 WARN_ONCE(rate->ant != ANT_A && rate->ant != ANT_B,
2920 "ant: 0x%x, chains 0x%x, fw tx ant: 0x%x, nvm tx ant: 0x%x\n",
2921 rate->ant, lq_sta->pers.chains, mvm->fw->valid_tx_ant,
2922 mvm->nvm_data ? mvm->nvm_data->valid_tx_ant : ANT_INVALID);
2923
2924 tbl->column = rs_get_column_from_rate(rate);
2925
2926 rs_set_expected_tpt_table(lq_sta, tbl);
2927 rs_fill_lq_cmd(mvm, sta, lq_sta, rate);
2928
2929 iwl_mvm_send_lq_cmd(mvm, &lq_sta->lq, !update);
2930}
2931
2932static void rs_drv_get_rate(void *mvm_r, struct ieee80211_sta *sta,
2933 void *mvm_sta,
2934 struct ieee80211_tx_rate_control *txrc)
2935{
2936 struct iwl_op_mode *op_mode = mvm_r;
2937 struct iwl_mvm *mvm __maybe_unused = IWL_OP_MODE_GET_MVM(op_mode);
2938 struct sk_buff *skb = txrc->skb;
2939 struct ieee80211_tx_info *info = IEEE80211_SKB_CB(skb);
2940 struct iwl_lq_sta *lq_sta;
2941 struct rs_rate *optimal_rate;
2942 u32 last_ucode_rate;
2943
2944 if (sta && !iwl_mvm_sta_from_mac80211(sta)->vif) {
2945
2946
2947
2948 sta = NULL;
2949 mvm_sta = NULL;
2950 }
2951
2952
2953 if (rate_control_send_low(sta, mvm_sta, txrc))
2954 return;
2955
2956 if (!mvm_sta)
2957 return;
2958
2959 lq_sta = mvm_sta;
2960 iwl_mvm_hwrate_to_tx_rate(lq_sta->last_rate_n_flags,
2961 info->band, &info->control.rates[0]);
2962 info->control.rates[0].count = 1;
2963
2964
2965
2966
2967 if (lq_sta->rs_state != RS_STATE_STAY_IN_COLUMN) {
2968 optimal_rate = rs_get_optimal_rate(mvm, lq_sta);
2969 last_ucode_rate = ucode_rate_from_rs_rate(mvm,
2970 optimal_rate);
2971 iwl_mvm_hwrate_to_tx_rate(last_ucode_rate, info->band,
2972 &txrc->reported_rate);
2973 }
2974}
2975
2976static void *rs_drv_alloc_sta(void *mvm_rate, struct ieee80211_sta *sta,
2977 gfp_t gfp)
2978{
2979 struct iwl_mvm_sta *mvmsta = iwl_mvm_sta_from_mac80211(sta);
2980 struct iwl_op_mode *op_mode = (struct iwl_op_mode *)mvm_rate;
2981 struct iwl_mvm *mvm = IWL_OP_MODE_GET_MVM(op_mode);
2982 struct iwl_lq_sta *lq_sta = &mvmsta->lq_sta.rs_drv;
2983
2984 IWL_DEBUG_RATE(mvm, "create station rate scale window\n");
2985
2986 lq_sta->pers.drv = mvm;
2987#ifdef CONFIG_MAC80211_DEBUGFS
2988 lq_sta->pers.dbg_fixed_rate = 0;
2989 lq_sta->pers.dbg_fixed_txp_reduction = TPC_INVALID;
2990 lq_sta->pers.ss_force = RS_SS_FORCE_NONE;
2991#endif
2992 lq_sta->pers.chains = 0;
2993 memset(lq_sta->pers.chain_signal, 0, sizeof(lq_sta->pers.chain_signal));
2994 lq_sta->pers.last_rssi = S8_MIN;
2995
2996 return lq_sta;
2997}
2998
2999static int rs_vht_highest_rx_mcs_index(struct ieee80211_sta_vht_cap *vht_cap,
3000 int nss)
3001{
3002 u16 rx_mcs = le16_to_cpu(vht_cap->vht_mcs.rx_mcs_map) &
3003 (0x3 << (2 * (nss - 1)));
3004 rx_mcs >>= (2 * (nss - 1));
3005
3006 if (rx_mcs == IEEE80211_VHT_MCS_SUPPORT_0_7)
3007 return IWL_RATE_MCS_7_INDEX;
3008 else if (rx_mcs == IEEE80211_VHT_MCS_SUPPORT_0_8)
3009 return IWL_RATE_MCS_8_INDEX;
3010 else if (rx_mcs == IEEE80211_VHT_MCS_SUPPORT_0_9)
3011 return IWL_RATE_MCS_9_INDEX;
3012
3013 WARN_ON_ONCE(rx_mcs != IEEE80211_VHT_MCS_NOT_SUPPORTED);
3014 return -1;
3015}
3016
3017static void rs_vht_set_enabled_rates(struct ieee80211_sta *sta,
3018 struct ieee80211_sta_vht_cap *vht_cap,
3019 struct iwl_lq_sta *lq_sta)
3020{
3021 int i;
3022 int highest_mcs = rs_vht_highest_rx_mcs_index(vht_cap, 1);
3023
3024 if (highest_mcs >= IWL_RATE_MCS_0_INDEX) {
3025 for (i = IWL_RATE_MCS_0_INDEX; i <= highest_mcs; i++) {
3026 if (i == IWL_RATE_9M_INDEX)
3027 continue;
3028
3029
3030 if (i == IWL_RATE_MCS_9_INDEX &&
3031 sta->bandwidth == IEEE80211_STA_RX_BW_20)
3032 continue;
3033
3034 lq_sta->active_siso_rate |= BIT(i);
3035 }
3036 }
3037
3038 if (sta->rx_nss < 2)
3039 return;
3040
3041 highest_mcs = rs_vht_highest_rx_mcs_index(vht_cap, 2);
3042 if (highest_mcs >= IWL_RATE_MCS_0_INDEX) {
3043 for (i = IWL_RATE_MCS_0_INDEX; i <= highest_mcs; i++) {
3044 if (i == IWL_RATE_9M_INDEX)
3045 continue;
3046
3047
3048 if (i == IWL_RATE_MCS_9_INDEX &&
3049 sta->bandwidth == IEEE80211_STA_RX_BW_20)
3050 continue;
3051
3052 lq_sta->active_mimo2_rate |= BIT(i);
3053 }
3054 }
3055}
3056
3057static void rs_ht_init(struct iwl_mvm *mvm,
3058 struct ieee80211_sta *sta,
3059 struct iwl_lq_sta *lq_sta,
3060 struct ieee80211_sta_ht_cap *ht_cap)
3061{
3062
3063
3064
3065
3066 lq_sta->active_siso_rate = ht_cap->mcs.rx_mask[0] << 1;
3067 lq_sta->active_siso_rate |= ht_cap->mcs.rx_mask[0] & 0x1;
3068 lq_sta->active_siso_rate &= ~((u16)0x2);
3069 lq_sta->active_siso_rate <<= IWL_FIRST_OFDM_RATE;
3070
3071 lq_sta->active_mimo2_rate = ht_cap->mcs.rx_mask[1] << 1;
3072 lq_sta->active_mimo2_rate |= ht_cap->mcs.rx_mask[1] & 0x1;
3073 lq_sta->active_mimo2_rate &= ~((u16)0x2);
3074 lq_sta->active_mimo2_rate <<= IWL_FIRST_OFDM_RATE;
3075
3076 if (mvm->cfg->ht_params->ldpc &&
3077 (ht_cap->cap & IEEE80211_HT_CAP_LDPC_CODING))
3078 lq_sta->ldpc = true;
3079
3080 if (mvm->cfg->ht_params->stbc &&
3081 (num_of_ant(iwl_mvm_get_valid_tx_ant(mvm)) > 1) &&
3082 (ht_cap->cap & IEEE80211_HT_CAP_RX_STBC))
3083 lq_sta->stbc_capable = true;
3084
3085 lq_sta->is_vht = false;
3086}
3087
3088static void rs_vht_init(struct iwl_mvm *mvm,
3089 struct ieee80211_sta *sta,
3090 struct iwl_lq_sta *lq_sta,
3091 struct ieee80211_sta_vht_cap *vht_cap)
3092{
3093 rs_vht_set_enabled_rates(sta, vht_cap, lq_sta);
3094
3095 if (mvm->cfg->ht_params->ldpc &&
3096 (vht_cap->cap & IEEE80211_VHT_CAP_RXLDPC))
3097 lq_sta->ldpc = true;
3098
3099 if (mvm->cfg->ht_params->stbc &&
3100 (num_of_ant(iwl_mvm_get_valid_tx_ant(mvm)) > 1) &&
3101 (vht_cap->cap & IEEE80211_VHT_CAP_RXSTBC_MASK))
3102 lq_sta->stbc_capable = true;
3103
3104 if (fw_has_capa(&mvm->fw->ucode_capa, IWL_UCODE_TLV_CAPA_BEAMFORMER) &&
3105 (num_of_ant(iwl_mvm_get_valid_tx_ant(mvm)) > 1) &&
3106 (vht_cap->cap & IEEE80211_VHT_CAP_SU_BEAMFORMEE_CAPABLE))
3107 lq_sta->bfer_capable = true;
3108
3109 lq_sta->is_vht = true;
3110}
3111
3112#ifdef CONFIG_IWLWIFI_DEBUGFS
3113void iwl_mvm_reset_frame_stats(struct iwl_mvm *mvm)
3114{
3115 spin_lock_bh(&mvm->drv_stats_lock);
3116 memset(&mvm->drv_rx_stats, 0, sizeof(mvm->drv_rx_stats));
3117 spin_unlock_bh(&mvm->drv_stats_lock);
3118}
3119
3120void iwl_mvm_update_frame_stats(struct iwl_mvm *mvm, u32 rate, bool agg)
3121{
3122 u8 nss = 0;
3123
3124 spin_lock(&mvm->drv_stats_lock);
3125
3126 if (agg)
3127 mvm->drv_rx_stats.agg_frames++;
3128
3129 mvm->drv_rx_stats.success_frames++;
3130
3131 switch (rate & RATE_MCS_CHAN_WIDTH_MSK) {
3132 case RATE_MCS_CHAN_WIDTH_20:
3133 mvm->drv_rx_stats.bw_20_frames++;
3134 break;
3135 case RATE_MCS_CHAN_WIDTH_40:
3136 mvm->drv_rx_stats.bw_40_frames++;
3137 break;
3138 case RATE_MCS_CHAN_WIDTH_80:
3139 mvm->drv_rx_stats.bw_80_frames++;
3140 break;
3141 case RATE_MCS_CHAN_WIDTH_160:
3142 mvm->drv_rx_stats.bw_160_frames++;
3143 break;
3144 default:
3145 WARN_ONCE(1, "bad BW. rate 0x%x", rate);
3146 }
3147
3148 if (rate & RATE_MCS_HT_MSK) {
3149 mvm->drv_rx_stats.ht_frames++;
3150 nss = ((rate & RATE_HT_MCS_NSS_MSK) >> RATE_HT_MCS_NSS_POS) + 1;
3151 } else if (rate & RATE_MCS_VHT_MSK) {
3152 mvm->drv_rx_stats.vht_frames++;
3153 nss = ((rate & RATE_VHT_MCS_NSS_MSK) >>
3154 RATE_VHT_MCS_NSS_POS) + 1;
3155 } else {
3156 mvm->drv_rx_stats.legacy_frames++;
3157 }
3158
3159 if (nss == 1)
3160 mvm->drv_rx_stats.siso_frames++;
3161 else if (nss == 2)
3162 mvm->drv_rx_stats.mimo2_frames++;
3163
3164 if (rate & RATE_MCS_SGI_MSK)
3165 mvm->drv_rx_stats.sgi_frames++;
3166 else
3167 mvm->drv_rx_stats.ngi_frames++;
3168
3169 mvm->drv_rx_stats.last_rates[mvm->drv_rx_stats.last_frame_idx] = rate;
3170 mvm->drv_rx_stats.last_frame_idx =
3171 (mvm->drv_rx_stats.last_frame_idx + 1) %
3172 ARRAY_SIZE(mvm->drv_rx_stats.last_rates);
3173
3174 spin_unlock(&mvm->drv_stats_lock);
3175}
3176#endif
3177
3178
3179
3180
3181static void rs_drv_rate_init(struct iwl_mvm *mvm, struct ieee80211_sta *sta,
3182 enum nl80211_band band, bool update)
3183{
3184 int i, j;
3185 struct ieee80211_hw *hw = mvm->hw;
3186 struct ieee80211_sta_ht_cap *ht_cap = &sta->ht_cap;
3187 struct ieee80211_sta_vht_cap *vht_cap = &sta->vht_cap;
3188 struct iwl_mvm_sta *mvmsta = iwl_mvm_sta_from_mac80211(sta);
3189 struct iwl_lq_sta *lq_sta = &mvmsta->lq_sta.rs_drv;
3190 struct ieee80211_supported_band *sband;
3191 unsigned long supp;
3192
3193
3194 memset(lq_sta, 0, offsetof(typeof(*lq_sta), pers));
3195
3196 sband = hw->wiphy->bands[band];
3197
3198 lq_sta->lq.sta_id = mvmsta->sta_id;
3199 mvmsta->amsdu_enabled = 0;
3200 mvmsta->max_amsdu_len = sta->max_amsdu_len;
3201
3202 for (j = 0; j < LQ_SIZE; j++)
3203 rs_rate_scale_clear_tbl_windows(mvm, &lq_sta->lq_info[j]);
3204
3205 lq_sta->flush_timer = 0;
3206 lq_sta->last_tx = jiffies;
3207
3208 IWL_DEBUG_RATE(mvm,
3209 "LQ: *** rate scale station global init for station %d ***\n",
3210 mvmsta->sta_id);
3211
3212
3213
3214
3215
3216 lq_sta->missed_rate_counter = IWL_MVM_RS_MISSED_RATE_MAX;
3217 lq_sta->band = sband->band;
3218
3219
3220
3221 supp = sta->supp_rates[sband->band];
3222 lq_sta->active_legacy_rate = 0;
3223 for_each_set_bit(i, &supp, BITS_PER_LONG)
3224 lq_sta->active_legacy_rate |= BIT(sband->bitrates[i].hw_value);
3225
3226
3227 if (!vht_cap || !vht_cap->vht_supported)
3228 rs_ht_init(mvm, sta, lq_sta, ht_cap);
3229 else
3230 rs_vht_init(mvm, sta, lq_sta, vht_cap);
3231
3232 lq_sta->max_legacy_rate_idx =
3233 rs_get_max_rate_from_mask(lq_sta->active_legacy_rate);
3234 lq_sta->max_siso_rate_idx =
3235 rs_get_max_rate_from_mask(lq_sta->active_siso_rate);
3236 lq_sta->max_mimo2_rate_idx =
3237 rs_get_max_rate_from_mask(lq_sta->active_mimo2_rate);
3238
3239 IWL_DEBUG_RATE(mvm,
3240 "LEGACY=%lX SISO=%lX MIMO2=%lX VHT=%d LDPC=%d STBC=%d BFER=%d\n",
3241 lq_sta->active_legacy_rate,
3242 lq_sta->active_siso_rate,
3243 lq_sta->active_mimo2_rate,
3244 lq_sta->is_vht, lq_sta->ldpc, lq_sta->stbc_capable,
3245 lq_sta->bfer_capable);
3246 IWL_DEBUG_RATE(mvm, "MAX RATE: LEGACY=%d SISO=%d MIMO2=%d\n",
3247 lq_sta->max_legacy_rate_idx,
3248 lq_sta->max_siso_rate_idx,
3249 lq_sta->max_mimo2_rate_idx);
3250
3251
3252 lq_sta->lq.single_stream_ant_msk =
3253 iwl_mvm_bt_coex_get_single_ant_msk(mvm, iwl_mvm_get_valid_tx_ant(mvm));
3254 lq_sta->lq.dual_stream_ant_msk = ANT_AB;
3255
3256
3257 lq_sta->tx_agg_tid_en = IWL_AGG_ALL_TID;
3258 lq_sta->is_agg = 0;
3259#ifdef CONFIG_IWLWIFI_DEBUGFS
3260 iwl_mvm_reset_frame_stats(mvm);
3261#endif
3262 rs_initialize_lq(mvm, sta, lq_sta, band, update);
3263}
3264
3265static void rs_drv_rate_update(void *mvm_r,
3266 struct ieee80211_supported_band *sband,
3267 struct cfg80211_chan_def *chandef,
3268 struct ieee80211_sta *sta,
3269 void *priv_sta, u32 changed)
3270{
3271 struct iwl_op_mode *op_mode = mvm_r;
3272 struct iwl_mvm *mvm __maybe_unused = IWL_OP_MODE_GET_MVM(op_mode);
3273 u8 tid;
3274
3275 if (!iwl_mvm_sta_from_mac80211(sta)->vif)
3276 return;
3277
3278
3279 for (tid = 0; tid < IWL_MAX_TID_COUNT; tid++)
3280 ieee80211_stop_tx_ba_session(sta, tid);
3281
3282 iwl_mvm_rs_rate_init(mvm, sta, sband->band, true);
3283}
3284
3285#ifdef CONFIG_MAC80211_DEBUGFS
3286static void rs_build_rates_table_from_fixed(struct iwl_mvm *mvm,
3287 struct iwl_lq_cmd *lq_cmd,
3288 enum nl80211_band band,
3289 u32 ucode_rate)
3290{
3291 struct rs_rate rate;
3292 int i;
3293 int num_rates = ARRAY_SIZE(lq_cmd->rs_table);
3294 __le32 ucode_rate_le32 = cpu_to_le32(ucode_rate);
3295 u8 ant = (ucode_rate & RATE_MCS_ANT_ABC_MSK) >> RATE_MCS_ANT_POS;
3296
3297 for (i = 0; i < num_rates; i++)
3298 lq_cmd->rs_table[i] = ucode_rate_le32;
3299
3300 if (rs_rate_from_ucode_rate(ucode_rate, band, &rate)) {
3301 WARN_ON_ONCE(1);
3302 return;
3303 }
3304
3305 if (is_mimo(&rate))
3306 lq_cmd->mimo_delim = num_rates - 1;
3307 else
3308 lq_cmd->mimo_delim = 0;
3309
3310 lq_cmd->reduced_tpc = 0;
3311
3312 if (num_of_ant(ant) == 1)
3313 lq_cmd->single_stream_ant_msk = ant;
3314
3315 if (!mvm->trans->cfg->gen2)
3316 lq_cmd->agg_frame_cnt_limit = LINK_QUAL_AGG_FRAME_LIMIT_DEF;
3317 else
3318 lq_cmd->agg_frame_cnt_limit =
3319 LINK_QUAL_AGG_FRAME_LIMIT_GEN2_DEF;
3320}
3321#endif
3322
3323static void rs_fill_rates_for_column(struct iwl_mvm *mvm,
3324 struct iwl_lq_sta *lq_sta,
3325 struct rs_rate *rate,
3326 __le32 *rs_table, int *rs_table_index,
3327 int num_rates, int num_retries,
3328 u8 valid_tx_ant, bool toggle_ant)
3329{
3330 int i, j;
3331 __le32 ucode_rate;
3332 bool bottom_reached = false;
3333 int prev_rate_idx = rate->index;
3334 int end = LINK_QUAL_MAX_RETRY_NUM;
3335 int index = *rs_table_index;
3336
3337 for (i = 0; i < num_rates && index < end; i++) {
3338 for (j = 0; j < num_retries && index < end; j++, index++) {
3339 ucode_rate = cpu_to_le32(ucode_rate_from_rs_rate(mvm,
3340 rate));
3341 rs_table[index] = ucode_rate;
3342 if (toggle_ant)
3343 rs_toggle_antenna(valid_tx_ant, rate);
3344 }
3345
3346 prev_rate_idx = rate->index;
3347 bottom_reached = rs_get_lower_rate_in_column(lq_sta, rate);
3348 if (bottom_reached && !is_legacy(rate))
3349 break;
3350 }
3351
3352 if (!bottom_reached && !is_legacy(rate))
3353 rate->index = prev_rate_idx;
3354
3355 *rs_table_index = index;
3356}
3357
3358
3359
3360
3361
3362
3363
3364
3365
3366
3367
3368
3369
3370
3371
3372
3373
3374
3375
3376
3377
3378static void rs_build_rates_table(struct iwl_mvm *mvm,
3379 struct ieee80211_sta *sta,
3380 struct iwl_lq_sta *lq_sta,
3381 const struct rs_rate *initial_rate)
3382{
3383 struct rs_rate rate;
3384 int num_rates, num_retries, index = 0;
3385 u8 valid_tx_ant = 0;
3386 struct iwl_lq_cmd *lq_cmd = &lq_sta->lq;
3387 bool toggle_ant = false;
3388 u32 color;
3389
3390 memcpy(&rate, initial_rate, sizeof(rate));
3391
3392 valid_tx_ant = iwl_mvm_get_valid_tx_ant(mvm);
3393
3394
3395 if (!fw_has_api(&mvm->fw->ucode_capa, IWL_UCODE_TLV_API_LQ_SS_PARAMS) &&
3396 rs_stbc_allow(mvm, sta, lq_sta))
3397 rate.stbc = true;
3398
3399 if (is_siso(&rate)) {
3400 num_rates = IWL_MVM_RS_INITIAL_SISO_NUM_RATES;
3401 num_retries = IWL_MVM_RS_HT_VHT_RETRIES_PER_RATE;
3402 } else if (is_mimo(&rate)) {
3403 num_rates = IWL_MVM_RS_INITIAL_MIMO_NUM_RATES;
3404 num_retries = IWL_MVM_RS_HT_VHT_RETRIES_PER_RATE;
3405 } else {
3406 num_rates = IWL_MVM_RS_INITIAL_LEGACY_NUM_RATES;
3407 num_retries = IWL_MVM_RS_INITIAL_LEGACY_RETRIES;
3408 toggle_ant = true;
3409 }
3410
3411 rs_fill_rates_for_column(mvm, lq_sta, &rate, lq_cmd->rs_table, &index,
3412 num_rates, num_retries, valid_tx_ant,
3413 toggle_ant);
3414
3415 rs_get_lower_rate_down_column(lq_sta, &rate);
3416
3417 if (is_siso(&rate)) {
3418 num_rates = IWL_MVM_RS_SECONDARY_SISO_NUM_RATES;
3419 num_retries = IWL_MVM_RS_SECONDARY_SISO_RETRIES;
3420 lq_cmd->mimo_delim = index;
3421 } else if (is_legacy(&rate)) {
3422 num_rates = IWL_MVM_RS_SECONDARY_LEGACY_NUM_RATES;
3423 num_retries = IWL_MVM_RS_SECONDARY_LEGACY_RETRIES;
3424 } else {
3425 WARN_ON_ONCE(1);
3426 }
3427
3428 toggle_ant = true;
3429
3430 rs_fill_rates_for_column(mvm, lq_sta, &rate, lq_cmd->rs_table, &index,
3431 num_rates, num_retries, valid_tx_ant,
3432 toggle_ant);
3433
3434 rs_get_lower_rate_down_column(lq_sta, &rate);
3435
3436 num_rates = IWL_MVM_RS_SECONDARY_LEGACY_NUM_RATES;
3437 num_retries = IWL_MVM_RS_SECONDARY_LEGACY_RETRIES;
3438
3439 rs_fill_rates_for_column(mvm, lq_sta, &rate, lq_cmd->rs_table, &index,
3440 num_rates, num_retries, valid_tx_ant,
3441 toggle_ant);
3442
3443
3444 color = LQ_FLAGS_COLOR_INC(LQ_FLAG_COLOR_GET(lq_cmd->flags));
3445 lq_cmd->flags = LQ_FLAG_COLOR_SET(lq_cmd->flags, color);
3446}
3447
3448struct rs_bfer_active_iter_data {
3449 struct ieee80211_sta *exclude_sta;
3450 struct iwl_mvm_sta *bfer_mvmsta;
3451};
3452
3453static void rs_bfer_active_iter(void *_data,
3454 struct ieee80211_sta *sta)
3455{
3456 struct rs_bfer_active_iter_data *data = _data;
3457 struct iwl_mvm_sta *mvmsta = iwl_mvm_sta_from_mac80211(sta);
3458 struct iwl_lq_cmd *lq_cmd = &mvmsta->lq_sta.rs_drv.lq;
3459 u32 ss_params = le32_to_cpu(lq_cmd->ss_params);
3460
3461 if (sta == data->exclude_sta)
3462 return;
3463
3464
3465 if (ss_params & LQ_SS_BFER_ALLOWED) {
3466 WARN_ON_ONCE(data->bfer_mvmsta != NULL);
3467
3468 data->bfer_mvmsta = mvmsta;
3469 }
3470}
3471
3472static int rs_bfer_priority(struct iwl_mvm_sta *sta)
3473{
3474 int prio = -1;
3475 enum nl80211_iftype viftype = ieee80211_vif_type_p2p(sta->vif);
3476
3477 switch (viftype) {
3478 case NL80211_IFTYPE_AP:
3479 case NL80211_IFTYPE_P2P_GO:
3480 prio = 3;
3481 break;
3482 case NL80211_IFTYPE_P2P_CLIENT:
3483 prio = 2;
3484 break;
3485 case NL80211_IFTYPE_STATION:
3486 prio = 1;
3487 break;
3488 default:
3489 WARN_ONCE(true, "viftype %d sta_id %d", viftype, sta->sta_id);
3490 prio = -1;
3491 }
3492
3493 return prio;
3494}
3495
3496
3497static int rs_bfer_priority_cmp(struct iwl_mvm_sta *sta1,
3498 struct iwl_mvm_sta *sta2)
3499{
3500 int prio1 = rs_bfer_priority(sta1);
3501 int prio2 = rs_bfer_priority(sta2);
3502
3503 if (prio1 > prio2)
3504 return 1;
3505 if (prio1 < prio2)
3506 return -1;
3507 return 0;
3508}
3509
3510static void rs_set_lq_ss_params(struct iwl_mvm *mvm,
3511 struct ieee80211_sta *sta,
3512 struct iwl_lq_sta *lq_sta,
3513 const struct rs_rate *initial_rate)
3514{
3515 struct iwl_lq_cmd *lq_cmd = &lq_sta->lq;
3516 struct iwl_mvm_sta *mvmsta = iwl_mvm_sta_from_mac80211(sta);
3517 struct rs_bfer_active_iter_data data = {
3518 .exclude_sta = sta,
3519 .bfer_mvmsta = NULL,
3520 };
3521 struct iwl_mvm_sta *bfer_mvmsta = NULL;
3522 u32 ss_params = LQ_SS_PARAMS_VALID;
3523
3524 if (!iwl_mvm_bt_coex_is_mimo_allowed(mvm, sta))
3525 goto out;
3526
3527#ifdef CONFIG_MAC80211_DEBUGFS
3528
3529
3530
3531 if (lq_sta->pers.ss_force == RS_SS_FORCE_STBC)
3532 ss_params |= (LQ_SS_STBC_1SS_ALLOWED | LQ_SS_FORCE);
3533 else if (lq_sta->pers.ss_force == RS_SS_FORCE_BFER)
3534 ss_params |= (LQ_SS_BFER_ALLOWED | LQ_SS_FORCE);
3535
3536 if (lq_sta->pers.ss_force != RS_SS_FORCE_NONE) {
3537 IWL_DEBUG_RATE(mvm, "Forcing single stream Tx decision %d\n",
3538 lq_sta->pers.ss_force);
3539 goto out;
3540 }
3541#endif
3542
3543 if (lq_sta->stbc_capable)
3544 ss_params |= LQ_SS_STBC_1SS_ALLOWED;
3545
3546 if (!lq_sta->bfer_capable)
3547 goto out;
3548
3549 ieee80211_iterate_stations_atomic(mvm->hw,
3550 rs_bfer_active_iter,
3551 &data);
3552 bfer_mvmsta = data.bfer_mvmsta;
3553
3554
3555
3556
3557
3558 if (!bfer_mvmsta) {
3559 IWL_DEBUG_RATE(mvm, "No sta with BFER allowed found. Allow\n");
3560
3561 ss_params |= LQ_SS_BFER_ALLOWED;
3562 goto out;
3563 }
3564
3565 IWL_DEBUG_RATE(mvm, "Found existing sta %d with BFER activated\n",
3566 bfer_mvmsta->sta_id);
3567
3568
3569 if (rs_bfer_priority_cmp(mvmsta, bfer_mvmsta) > 0) {
3570 struct iwl_lq_cmd *bfersta_lq_cmd =
3571 &bfer_mvmsta->lq_sta.rs_drv.lq;
3572 u32 bfersta_ss_params = le32_to_cpu(bfersta_lq_cmd->ss_params);
3573
3574 bfersta_ss_params &= ~LQ_SS_BFER_ALLOWED;
3575 bfersta_lq_cmd->ss_params = cpu_to_le32(bfersta_ss_params);
3576 iwl_mvm_send_lq_cmd(mvm, bfersta_lq_cmd, false);
3577
3578 ss_params |= LQ_SS_BFER_ALLOWED;
3579 IWL_DEBUG_RATE(mvm,
3580 "Lower priority BFER sta found (%d). Switch BFER\n",
3581 bfer_mvmsta->sta_id);
3582 }
3583out:
3584 lq_cmd->ss_params = cpu_to_le32(ss_params);
3585}
3586
3587static void rs_fill_lq_cmd(struct iwl_mvm *mvm,
3588 struct ieee80211_sta *sta,
3589 struct iwl_lq_sta *lq_sta,
3590 const struct rs_rate *initial_rate)
3591{
3592 struct iwl_lq_cmd *lq_cmd = &lq_sta->lq;
3593 struct iwl_mvm_sta *mvmsta;
3594 struct iwl_mvm_vif *mvmvif;
3595
3596 lq_cmd->agg_disable_start_th = IWL_MVM_RS_AGG_DISABLE_START;
3597 lq_cmd->agg_time_limit =
3598 cpu_to_le16(IWL_MVM_RS_AGG_TIME_LIMIT);
3599
3600#ifdef CONFIG_MAC80211_DEBUGFS
3601 if (lq_sta->pers.dbg_fixed_rate) {
3602 rs_build_rates_table_from_fixed(mvm, lq_cmd,
3603 lq_sta->band,
3604 lq_sta->pers.dbg_fixed_rate);
3605 return;
3606 }
3607#endif
3608 if (WARN_ON_ONCE(!sta || !initial_rate))
3609 return;
3610
3611 rs_build_rates_table(mvm, sta, lq_sta, initial_rate);
3612
3613 if (fw_has_api(&mvm->fw->ucode_capa, IWL_UCODE_TLV_API_LQ_SS_PARAMS))
3614 rs_set_lq_ss_params(mvm, sta, lq_sta, initial_rate);
3615
3616 mvmsta = iwl_mvm_sta_from_mac80211(sta);
3617 mvmvif = iwl_mvm_vif_from_mac80211(mvmsta->vif);
3618
3619 if (!fw_has_capa(&mvm->fw->ucode_capa, IWL_UCODE_TLV_CAPA_COEX_SCHEMA_2) &&
3620 num_of_ant(initial_rate->ant) == 1)
3621 lq_cmd->single_stream_ant_msk = initial_rate->ant;
3622
3623 lq_cmd->agg_frame_cnt_limit = mvmsta->max_agg_bufsize;
3624
3625
3626
3627
3628
3629
3630 if (iwl_mvm_vif_low_latency(mvmvif))
3631 lq_cmd->agg_frame_cnt_limit--;
3632
3633 if (mvmsta->vif->p2p)
3634 lq_cmd->flags |= LQ_FLAG_USE_RTS_MSK;
3635
3636 lq_cmd->agg_time_limit =
3637 cpu_to_le16(iwl_mvm_coex_agg_time_limit(mvm, sta));
3638}
3639
3640static void *rs_alloc(struct ieee80211_hw *hw, struct dentry *debugfsdir)
3641{
3642 return hw->priv;
3643}
3644
3645
3646static void rs_free(void *mvm_rate)
3647{
3648 return;
3649}
3650
3651static void rs_free_sta(void *mvm_r, struct ieee80211_sta *sta, void *mvm_sta)
3652{
3653 struct iwl_op_mode *op_mode __maybe_unused = mvm_r;
3654 struct iwl_mvm *mvm __maybe_unused = IWL_OP_MODE_GET_MVM(op_mode);
3655
3656 IWL_DEBUG_RATE(mvm, "enter\n");
3657 IWL_DEBUG_RATE(mvm, "leave\n");
3658}
3659
3660#ifdef CONFIG_MAC80211_DEBUGFS
3661int rs_pretty_print_rate(char *buf, int bufsz, const u32 rate)
3662{
3663
3664 char *type, *bw;
3665 u8 mcs = 0, nss = 0;
3666 u8 ant = (rate & RATE_MCS_ANT_ABC_MSK) >> RATE_MCS_ANT_POS;
3667
3668 if (!(rate & RATE_MCS_HT_MSK) &&
3669 !(rate & RATE_MCS_VHT_MSK) &&
3670 !(rate & RATE_MCS_HE_MSK)) {
3671 int index = iwl_hwrate_to_plcp_idx(rate);
3672
3673 return scnprintf(buf, bufsz, "Legacy | ANT: %s Rate: %s Mbps\n",
3674 rs_pretty_ant(ant),
3675 index == IWL_RATE_INVALID ? "BAD" :
3676 iwl_rate_mcs[index].mbps);
3677 }
3678
3679 if (rate & RATE_MCS_VHT_MSK) {
3680 type = "VHT";
3681 mcs = rate & RATE_VHT_MCS_RATE_CODE_MSK;
3682 nss = ((rate & RATE_VHT_MCS_NSS_MSK)
3683 >> RATE_VHT_MCS_NSS_POS) + 1;
3684 } else if (rate & RATE_MCS_HT_MSK) {
3685 type = "HT";
3686 mcs = rate & RATE_HT_MCS_INDEX_MSK;
3687 nss = ((rate & RATE_HT_MCS_NSS_MSK)
3688 >> RATE_HT_MCS_NSS_POS) + 1;
3689 } else if (rate & RATE_MCS_HE_MSK) {
3690 type = "HE";
3691 mcs = rate & RATE_VHT_MCS_RATE_CODE_MSK;
3692 nss = ((rate & RATE_VHT_MCS_NSS_MSK)
3693 >> RATE_VHT_MCS_NSS_POS) + 1;
3694 } else {
3695 type = "Unknown";
3696 }
3697
3698 switch (rate & RATE_MCS_CHAN_WIDTH_MSK) {
3699 case RATE_MCS_CHAN_WIDTH_20:
3700 bw = "20Mhz";
3701 break;
3702 case RATE_MCS_CHAN_WIDTH_40:
3703 bw = "40Mhz";
3704 break;
3705 case RATE_MCS_CHAN_WIDTH_80:
3706 bw = "80Mhz";
3707 break;
3708 case RATE_MCS_CHAN_WIDTH_160:
3709 bw = "160Mhz";
3710 break;
3711 default:
3712 bw = "BAD BW";
3713 }
3714
3715 return scnprintf(buf, bufsz,
3716 "%s | ANT: %s BW: %s MCS: %d NSS: %d %s%s%s%s\n",
3717 type, rs_pretty_ant(ant), bw, mcs, nss,
3718 (rate & RATE_MCS_SGI_MSK) ? "SGI " : "NGI ",
3719 (rate & RATE_MCS_STBC_MSK) ? "STBC " : "",
3720 (rate & RATE_MCS_LDPC_MSK) ? "LDPC " : "",
3721 (rate & RATE_MCS_BF_MSK) ? "BF " : "");
3722}
3723
3724
3725
3726
3727
3728
3729
3730static void rs_program_fix_rate(struct iwl_mvm *mvm,
3731 struct iwl_lq_sta *lq_sta)
3732{
3733 lq_sta->active_legacy_rate = 0x0FFF;
3734 lq_sta->active_siso_rate = 0x1FD0;
3735 lq_sta->active_mimo2_rate = 0x1FD0;
3736
3737 IWL_DEBUG_RATE(mvm, "sta_id %d rate 0x%X\n",
3738 lq_sta->lq.sta_id, lq_sta->pers.dbg_fixed_rate);
3739
3740 if (lq_sta->pers.dbg_fixed_rate) {
3741 rs_fill_lq_cmd(mvm, NULL, lq_sta, NULL);
3742 iwl_mvm_send_lq_cmd(lq_sta->pers.drv, &lq_sta->lq, false);
3743 }
3744}
3745
3746static ssize_t rs_sta_dbgfs_scale_table_write(struct file *file,
3747 const char __user *user_buf, size_t count, loff_t *ppos)
3748{
3749 struct iwl_lq_sta *lq_sta = file->private_data;
3750 struct iwl_mvm *mvm;
3751 char buf[64];
3752 size_t buf_size;
3753 u32 parsed_rate;
3754
3755 mvm = lq_sta->pers.drv;
3756 memset(buf, 0, sizeof(buf));
3757 buf_size = min(count, sizeof(buf) - 1);
3758 if (copy_from_user(buf, user_buf, buf_size))
3759 return -EFAULT;
3760
3761 if (sscanf(buf, "%x", &parsed_rate) == 1)
3762 lq_sta->pers.dbg_fixed_rate = parsed_rate;
3763 else
3764 lq_sta->pers.dbg_fixed_rate = 0;
3765
3766 rs_program_fix_rate(mvm, lq_sta);
3767
3768 return count;
3769}
3770
3771static ssize_t rs_sta_dbgfs_scale_table_read(struct file *file,
3772 char __user *user_buf, size_t count, loff_t *ppos)
3773{
3774 char *buff;
3775 int desc = 0;
3776 int i = 0;
3777 ssize_t ret;
3778 static const size_t bufsz = 2048;
3779
3780 struct iwl_lq_sta *lq_sta = file->private_data;
3781 struct iwl_mvm_sta *mvmsta =
3782 container_of(lq_sta, struct iwl_mvm_sta, lq_sta.rs_drv);
3783 struct iwl_mvm *mvm;
3784 struct iwl_scale_tbl_info *tbl = &(lq_sta->lq_info[lq_sta->active_tbl]);
3785 struct rs_rate *rate = &tbl->rate;
3786 u32 ss_params;
3787
3788 mvm = lq_sta->pers.drv;
3789 buff = kmalloc(bufsz, GFP_KERNEL);
3790 if (!buff)
3791 return -ENOMEM;
3792
3793 desc += scnprintf(buff + desc, bufsz - desc,
3794 "sta_id %d\n", lq_sta->lq.sta_id);
3795 desc += scnprintf(buff + desc, bufsz - desc,
3796 "failed=%d success=%d rate=0%lX\n",
3797 lq_sta->total_failed, lq_sta->total_success,
3798 lq_sta->active_legacy_rate);
3799 desc += scnprintf(buff + desc, bufsz - desc, "fixed rate 0x%X\n",
3800 lq_sta->pers.dbg_fixed_rate);
3801 desc += scnprintf(buff + desc, bufsz - desc, "valid_tx_ant %s%s%s\n",
3802 (iwl_mvm_get_valid_tx_ant(mvm) & ANT_A) ? "ANT_A," : "",
3803 (iwl_mvm_get_valid_tx_ant(mvm) & ANT_B) ? "ANT_B," : "",
3804 (iwl_mvm_get_valid_tx_ant(mvm) & ANT_C) ? "ANT_C" : "");
3805 desc += scnprintf(buff + desc, bufsz - desc, "lq type %s\n",
3806 (is_legacy(rate)) ? "legacy" :
3807 is_vht(rate) ? "VHT" : "HT");
3808 if (!is_legacy(rate)) {
3809 desc += scnprintf(buff + desc, bufsz - desc, " %s",
3810 (is_siso(rate)) ? "SISO" : "MIMO2");
3811 desc += scnprintf(buff + desc, bufsz - desc, " %s",
3812 (is_ht20(rate)) ? "20MHz" :
3813 (is_ht40(rate)) ? "40MHz" :
3814 (is_ht80(rate)) ? "80MHz" :
3815 (is_ht160(rate)) ? "160MHz" : "BAD BW");
3816 desc += scnprintf(buff + desc, bufsz - desc, " %s %s %s %s\n",
3817 (rate->sgi) ? "SGI" : "NGI",
3818 (rate->ldpc) ? "LDPC" : "BCC",
3819 (lq_sta->is_agg) ? "AGG on" : "",
3820 (mvmsta->amsdu_enabled) ? "AMSDU on" : "");
3821 }
3822 desc += scnprintf(buff + desc, bufsz - desc, "last tx rate=0x%X\n",
3823 lq_sta->last_rate_n_flags);
3824 desc += scnprintf(buff + desc, bufsz - desc,
3825 "general: flags=0x%X mimo-d=%d s-ant=0x%x d-ant=0x%x\n",
3826 lq_sta->lq.flags,
3827 lq_sta->lq.mimo_delim,
3828 lq_sta->lq.single_stream_ant_msk,
3829 lq_sta->lq.dual_stream_ant_msk);
3830
3831 desc += scnprintf(buff + desc, bufsz - desc,
3832 "agg: time_limit=%d dist_start_th=%d frame_cnt_limit=%d\n",
3833 le16_to_cpu(lq_sta->lq.agg_time_limit),
3834 lq_sta->lq.agg_disable_start_th,
3835 lq_sta->lq.agg_frame_cnt_limit);
3836
3837 desc += scnprintf(buff + desc, bufsz - desc, "reduced tpc=%d\n",
3838 lq_sta->lq.reduced_tpc);
3839 ss_params = le32_to_cpu(lq_sta->lq.ss_params);
3840 desc += scnprintf(buff + desc, bufsz - desc,
3841 "single stream params: %s%s%s%s\n",
3842 (ss_params & LQ_SS_PARAMS_VALID) ?
3843 "VALID" : "INVALID",
3844 (ss_params & LQ_SS_BFER_ALLOWED) ?
3845 ", BFER" : "",
3846 (ss_params & LQ_SS_STBC_1SS_ALLOWED) ?
3847 ", STBC" : "",
3848 (ss_params & LQ_SS_FORCE) ?
3849 ", FORCE" : "");
3850 desc += scnprintf(buff + desc, bufsz - desc,
3851 "Start idx [0]=0x%x [1]=0x%x [2]=0x%x [3]=0x%x\n",
3852 lq_sta->lq.initial_rate_index[0],
3853 lq_sta->lq.initial_rate_index[1],
3854 lq_sta->lq.initial_rate_index[2],
3855 lq_sta->lq.initial_rate_index[3]);
3856
3857 for (i = 0; i < LINK_QUAL_MAX_RETRY_NUM; i++) {
3858 u32 r = le32_to_cpu(lq_sta->lq.rs_table[i]);
3859
3860 desc += scnprintf(buff + desc, bufsz - desc,
3861 " rate[%d] 0x%X ", i, r);
3862 desc += rs_pretty_print_rate(buff + desc, bufsz - desc, r);
3863 }
3864
3865 ret = simple_read_from_buffer(user_buf, count, ppos, buff, desc);
3866 kfree(buff);
3867 return ret;
3868}
3869
3870static const struct file_operations rs_sta_dbgfs_scale_table_ops = {
3871 .write = rs_sta_dbgfs_scale_table_write,
3872 .read = rs_sta_dbgfs_scale_table_read,
3873 .open = simple_open,
3874 .llseek = default_llseek,
3875};
3876static ssize_t rs_sta_dbgfs_stats_table_read(struct file *file,
3877 char __user *user_buf, size_t count, loff_t *ppos)
3878{
3879 char *buff;
3880 int desc = 0;
3881 int i, j;
3882 ssize_t ret;
3883 struct iwl_scale_tbl_info *tbl;
3884 struct rs_rate *rate;
3885 struct iwl_lq_sta *lq_sta = file->private_data;
3886
3887 buff = kmalloc(1024, GFP_KERNEL);
3888 if (!buff)
3889 return -ENOMEM;
3890
3891 for (i = 0; i < LQ_SIZE; i++) {
3892 tbl = &(lq_sta->lq_info[i]);
3893 rate = &tbl->rate;
3894 desc += sprintf(buff+desc,
3895 "%s type=%d SGI=%d BW=%s DUP=0\n"
3896 "index=%d\n",
3897 lq_sta->active_tbl == i ? "*" : "x",
3898 rate->type,
3899 rate->sgi,
3900 is_ht20(rate) ? "20MHz" :
3901 is_ht40(rate) ? "40MHz" :
3902 is_ht80(rate) ? "80MHz" :
3903 is_ht160(rate) ? "160MHz" : "ERR",
3904 rate->index);
3905 for (j = 0; j < IWL_RATE_COUNT; j++) {
3906 desc += sprintf(buff+desc,
3907 "counter=%d success=%d %%=%d\n",
3908 tbl->win[j].counter,
3909 tbl->win[j].success_counter,
3910 tbl->win[j].success_ratio);
3911 }
3912 }
3913 ret = simple_read_from_buffer(user_buf, count, ppos, buff, desc);
3914 kfree(buff);
3915 return ret;
3916}
3917
3918static const struct file_operations rs_sta_dbgfs_stats_table_ops = {
3919 .read = rs_sta_dbgfs_stats_table_read,
3920 .open = simple_open,
3921 .llseek = default_llseek,
3922};
3923
3924static ssize_t rs_sta_dbgfs_drv_tx_stats_read(struct file *file,
3925 char __user *user_buf,
3926 size_t count, loff_t *ppos)
3927{
3928 static const char * const column_name[] = {
3929 [RS_COLUMN_LEGACY_ANT_A] = "LEGACY_ANT_A",
3930 [RS_COLUMN_LEGACY_ANT_B] = "LEGACY_ANT_B",
3931 [RS_COLUMN_SISO_ANT_A] = "SISO_ANT_A",
3932 [RS_COLUMN_SISO_ANT_B] = "SISO_ANT_B",
3933 [RS_COLUMN_SISO_ANT_A_SGI] = "SISO_ANT_A_SGI",
3934 [RS_COLUMN_SISO_ANT_B_SGI] = "SISO_ANT_B_SGI",
3935 [RS_COLUMN_MIMO2] = "MIMO2",
3936 [RS_COLUMN_MIMO2_SGI] = "MIMO2_SGI",
3937 };
3938
3939 static const char * const rate_name[] = {
3940 [IWL_RATE_1M_INDEX] = "1M",
3941 [IWL_RATE_2M_INDEX] = "2M",
3942 [IWL_RATE_5M_INDEX] = "5.5M",
3943 [IWL_RATE_11M_INDEX] = "11M",
3944 [IWL_RATE_6M_INDEX] = "6M|MCS0",
3945 [IWL_RATE_9M_INDEX] = "9M",
3946 [IWL_RATE_12M_INDEX] = "12M|MCS1",
3947 [IWL_RATE_18M_INDEX] = "18M|MCS2",
3948 [IWL_RATE_24M_INDEX] = "24M|MCS3",
3949 [IWL_RATE_36M_INDEX] = "36M|MCS4",
3950 [IWL_RATE_48M_INDEX] = "48M|MCS5",
3951 [IWL_RATE_54M_INDEX] = "54M|MCS6",
3952 [IWL_RATE_MCS_7_INDEX] = "MCS7",
3953 [IWL_RATE_MCS_8_INDEX] = "MCS8",
3954 [IWL_RATE_MCS_9_INDEX] = "MCS9",
3955 [IWL_RATE_MCS_10_INDEX] = "MCS10",
3956 [IWL_RATE_MCS_11_INDEX] = "MCS11",
3957 };
3958
3959 char *buff, *pos, *endpos;
3960 int col, rate;
3961 ssize_t ret;
3962 struct iwl_lq_sta *lq_sta = file->private_data;
3963 struct rs_rate_stats *stats;
3964 static const size_t bufsz = 1024;
3965
3966 buff = kmalloc(bufsz, GFP_KERNEL);
3967 if (!buff)
3968 return -ENOMEM;
3969
3970 pos = buff;
3971 endpos = pos + bufsz;
3972
3973 pos += scnprintf(pos, endpos - pos, "COLUMN,");
3974 for (rate = 0; rate < IWL_RATE_COUNT; rate++)
3975 pos += scnprintf(pos, endpos - pos, "%s,", rate_name[rate]);
3976 pos += scnprintf(pos, endpos - pos, "\n");
3977
3978 for (col = 0; col < RS_COLUMN_COUNT; col++) {
3979 pos += scnprintf(pos, endpos - pos,
3980 "%s,", column_name[col]);
3981
3982 for (rate = 0; rate < IWL_RATE_COUNT; rate++) {
3983 stats = &(lq_sta->pers.tx_stats[col][rate]);
3984 pos += scnprintf(pos, endpos - pos,
3985 "%llu/%llu,",
3986 stats->success,
3987 stats->total);
3988 }
3989 pos += scnprintf(pos, endpos - pos, "\n");
3990 }
3991
3992 ret = simple_read_from_buffer(user_buf, count, ppos, buff, pos - buff);
3993 kfree(buff);
3994 return ret;
3995}
3996
3997static ssize_t rs_sta_dbgfs_drv_tx_stats_write(struct file *file,
3998 const char __user *user_buf,
3999 size_t count, loff_t *ppos)
4000{
4001 struct iwl_lq_sta *lq_sta = file->private_data;
4002 memset(lq_sta->pers.tx_stats, 0, sizeof(lq_sta->pers.tx_stats));
4003
4004 return count;
4005}
4006
4007static const struct file_operations rs_sta_dbgfs_drv_tx_stats_ops = {
4008 .read = rs_sta_dbgfs_drv_tx_stats_read,
4009 .write = rs_sta_dbgfs_drv_tx_stats_write,
4010 .open = simple_open,
4011 .llseek = default_llseek,
4012};
4013
4014static ssize_t iwl_dbgfs_ss_force_read(struct file *file,
4015 char __user *user_buf,
4016 size_t count, loff_t *ppos)
4017{
4018 struct iwl_lq_sta *lq_sta = file->private_data;
4019 char buf[12];
4020 int bufsz = sizeof(buf);
4021 int pos = 0;
4022 static const char * const ss_force_name[] = {
4023 [RS_SS_FORCE_NONE] = "none",
4024 [RS_SS_FORCE_STBC] = "stbc",
4025 [RS_SS_FORCE_BFER] = "bfer",
4026 [RS_SS_FORCE_SISO] = "siso",
4027 };
4028
4029 pos += scnprintf(buf+pos, bufsz-pos, "%s\n",
4030 ss_force_name[lq_sta->pers.ss_force]);
4031 return simple_read_from_buffer(user_buf, count, ppos, buf, pos);
4032}
4033
4034static ssize_t iwl_dbgfs_ss_force_write(struct iwl_lq_sta *lq_sta, char *buf,
4035 size_t count, loff_t *ppos)
4036{
4037 struct iwl_mvm *mvm = lq_sta->pers.drv;
4038 int ret = 0;
4039
4040 if (!strncmp("none", buf, 4)) {
4041 lq_sta->pers.ss_force = RS_SS_FORCE_NONE;
4042 } else if (!strncmp("siso", buf, 4)) {
4043 lq_sta->pers.ss_force = RS_SS_FORCE_SISO;
4044 } else if (!strncmp("stbc", buf, 4)) {
4045 if (lq_sta->stbc_capable) {
4046 lq_sta->pers.ss_force = RS_SS_FORCE_STBC;
4047 } else {
4048 IWL_ERR(mvm,
4049 "can't force STBC. peer doesn't support\n");
4050 ret = -EINVAL;
4051 }
4052 } else if (!strncmp("bfer", buf, 4)) {
4053 if (lq_sta->bfer_capable) {
4054 lq_sta->pers.ss_force = RS_SS_FORCE_BFER;
4055 } else {
4056 IWL_ERR(mvm,
4057 "can't force BFER. peer doesn't support\n");
4058 ret = -EINVAL;
4059 }
4060 } else {
4061 IWL_ERR(mvm, "valid values none|siso|stbc|bfer\n");
4062 ret = -EINVAL;
4063 }
4064 return ret ?: count;
4065}
4066
4067#define MVM_DEBUGFS_READ_WRITE_FILE_OPS(name, bufsz) \
4068 _MVM_DEBUGFS_READ_WRITE_FILE_OPS(name, bufsz, struct iwl_lq_sta)
4069#define MVM_DEBUGFS_ADD_FILE_RS(name, parent, mode) do { \
4070 debugfs_create_file(#name, mode, parent, lq_sta, \
4071 &iwl_dbgfs_##name##_ops); \
4072 } while (0)
4073
4074MVM_DEBUGFS_READ_WRITE_FILE_OPS(ss_force, 32);
4075
4076static void rs_drv_add_sta_debugfs(void *mvm, void *priv_sta,
4077 struct dentry *dir)
4078{
4079 struct iwl_lq_sta *lq_sta = priv_sta;
4080 struct iwl_mvm_sta *mvmsta;
4081
4082 mvmsta = container_of(lq_sta, struct iwl_mvm_sta, lq_sta.rs_drv);
4083
4084 if (!mvmsta->vif)
4085 return;
4086
4087 debugfs_create_file("rate_scale_table", 0600, dir,
4088 lq_sta, &rs_sta_dbgfs_scale_table_ops);
4089 debugfs_create_file("rate_stats_table", 0400, dir,
4090 lq_sta, &rs_sta_dbgfs_stats_table_ops);
4091 debugfs_create_file("drv_tx_stats", 0600, dir,
4092 lq_sta, &rs_sta_dbgfs_drv_tx_stats_ops);
4093 debugfs_create_u8("tx_agg_tid_enable", 0600, dir,
4094 &lq_sta->tx_agg_tid_en);
4095 debugfs_create_u8("reduced_tpc", 0600, dir,
4096 &lq_sta->pers.dbg_fixed_txp_reduction);
4097
4098 MVM_DEBUGFS_ADD_FILE_RS(ss_force, dir, 0600);
4099}
4100
4101void rs_remove_sta_debugfs(void *mvm, void *mvm_sta)
4102{
4103}
4104#endif
4105
4106
4107
4108
4109
4110
4111static void rs_rate_init_ops(void *mvm_r,
4112 struct ieee80211_supported_band *sband,
4113 struct cfg80211_chan_def *chandef,
4114 struct ieee80211_sta *sta, void *mvm_sta)
4115{
4116}
4117
4118
4119static const struct rate_control_ops rs_mvm_ops_drv = {
4120 .name = RS_NAME,
4121 .tx_status = rs_drv_mac80211_tx_status,
4122 .get_rate = rs_drv_get_rate,
4123 .rate_init = rs_rate_init_ops,
4124 .alloc = rs_alloc,
4125 .free = rs_free,
4126 .alloc_sta = rs_drv_alloc_sta,
4127 .free_sta = rs_free_sta,
4128 .rate_update = rs_drv_rate_update,
4129#ifdef CONFIG_MAC80211_DEBUGFS
4130 .add_sta_debugfs = rs_drv_add_sta_debugfs,
4131 .remove_sta_debugfs = rs_remove_sta_debugfs,
4132#endif
4133 .capa = RATE_CTRL_CAPA_VHT_EXT_NSS_BW,
4134};
4135
4136void iwl_mvm_rs_rate_init(struct iwl_mvm *mvm, struct ieee80211_sta *sta,
4137 enum nl80211_band band, bool update)
4138{
4139 if (iwl_mvm_has_tlc_offload(mvm))
4140 rs_fw_rate_init(mvm, sta, band, update);
4141 else
4142 rs_drv_rate_init(mvm, sta, band, update);
4143}
4144
4145int iwl_mvm_rate_control_register(void)
4146{
4147 return ieee80211_rate_control_register(&rs_mvm_ops_drv);
4148}
4149
4150void iwl_mvm_rate_control_unregister(void)
4151{
4152 ieee80211_rate_control_unregister(&rs_mvm_ops_drv);
4153}
4154
4155static int rs_drv_tx_protection(struct iwl_mvm *mvm, struct iwl_mvm_sta *mvmsta,
4156 bool enable)
4157{
4158 struct iwl_lq_cmd *lq = &mvmsta->lq_sta.rs_drv.lq;
4159
4160 lockdep_assert_held(&mvm->mutex);
4161
4162 if (enable) {
4163 if (mvmsta->tx_protection == 0)
4164 lq->flags |= LQ_FLAG_USE_RTS_MSK;
4165 mvmsta->tx_protection++;
4166 } else {
4167 mvmsta->tx_protection--;
4168 if (mvmsta->tx_protection == 0)
4169 lq->flags &= ~LQ_FLAG_USE_RTS_MSK;
4170 }
4171
4172 return iwl_mvm_send_lq_cmd(mvm, lq, false);
4173}
4174
4175
4176
4177
4178
4179
4180int iwl_mvm_tx_protection(struct iwl_mvm *mvm, struct iwl_mvm_sta *mvmsta,
4181 bool enable)
4182{
4183 if (iwl_mvm_has_tlc_offload(mvm))
4184 return rs_fw_tx_protection(mvm, mvmsta, enable);
4185 else
4186 return rs_drv_tx_protection(mvm, mvmsta, enable);
4187}
4188