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28#include <linux/kernel.h>
29#include <linux/skbuff.h>
30#include <linux/slab.h>
31#include <net/mac80211.h>
32
33#include <linux/netdevice.h>
34#include <linux/etherdevice.h>
35#include <linux/delay.h>
36
37#include <linux/workqueue.h>
38#include "rs.h"
39#include "fw-api.h"
40#include "sta.h"
41#include "iwl-op-mode.h"
42#include "mvm.h"
43#include "debugfs.h"
44
45#define RS_NAME "iwl-mvm-rs"
46
47#define IWL_RATE_MAX_WINDOW 62
48
49
50
51
52#define RS_PERCENT(x) (128 * x)
53
54static u8 rs_ht_to_legacy[] = {
55 [IWL_RATE_MCS_0_INDEX] = IWL_RATE_6M_INDEX,
56 [IWL_RATE_MCS_1_INDEX] = IWL_RATE_9M_INDEX,
57 [IWL_RATE_MCS_2_INDEX] = IWL_RATE_12M_INDEX,
58 [IWL_RATE_MCS_3_INDEX] = IWL_RATE_18M_INDEX,
59 [IWL_RATE_MCS_4_INDEX] = IWL_RATE_24M_INDEX,
60 [IWL_RATE_MCS_5_INDEX] = IWL_RATE_36M_INDEX,
61 [IWL_RATE_MCS_6_INDEX] = IWL_RATE_48M_INDEX,
62 [IWL_RATE_MCS_7_INDEX] = IWL_RATE_54M_INDEX,
63 [IWL_RATE_MCS_8_INDEX] = IWL_RATE_54M_INDEX,
64 [IWL_RATE_MCS_9_INDEX] = IWL_RATE_54M_INDEX,
65};
66
67static const u8 ant_toggle_lookup[] = {
68 [ANT_NONE] = ANT_NONE,
69 [ANT_A] = ANT_B,
70 [ANT_B] = ANT_C,
71 [ANT_AB] = ANT_BC,
72 [ANT_C] = ANT_A,
73 [ANT_AC] = ANT_AB,
74 [ANT_BC] = ANT_AC,
75 [ANT_ABC] = ANT_ABC,
76};
77
78#define IWL_DECLARE_RATE_INFO(r, s, rp, rn) \
79 [IWL_RATE_##r##M_INDEX] = { IWL_RATE_##r##M_PLCP, \
80 IWL_RATE_HT_SISO_MCS_##s##_PLCP, \
81 IWL_RATE_HT_MIMO2_MCS_##s##_PLCP, \
82 IWL_RATE_VHT_SISO_MCS_##s##_PLCP, \
83 IWL_RATE_VHT_MIMO2_MCS_##s##_PLCP,\
84 IWL_RATE_##rp##M_INDEX, \
85 IWL_RATE_##rn##M_INDEX }
86
87#define IWL_DECLARE_MCS_RATE(s) \
88 [IWL_RATE_MCS_##s##_INDEX] = { IWL_RATE_INVM_PLCP, \
89 IWL_RATE_HT_SISO_MCS_##s##_PLCP, \
90 IWL_RATE_HT_MIMO2_MCS_##s##_PLCP, \
91 IWL_RATE_VHT_SISO_MCS_##s##_PLCP, \
92 IWL_RATE_VHT_MIMO2_MCS_##s##_PLCP, \
93 IWL_RATE_INVM_INDEX, \
94 IWL_RATE_INVM_INDEX }
95
96
97
98
99
100
101
102
103
104static const struct iwl_rs_rate_info iwl_rates[IWL_RATE_COUNT] = {
105 IWL_DECLARE_RATE_INFO(1, INV, INV, 2),
106 IWL_DECLARE_RATE_INFO(2, INV, 1, 5),
107 IWL_DECLARE_RATE_INFO(5, INV, 2, 11),
108 IWL_DECLARE_RATE_INFO(11, INV, 9, 12),
109 IWL_DECLARE_RATE_INFO(6, 0, 5, 11),
110 IWL_DECLARE_RATE_INFO(9, INV, 6, 11),
111 IWL_DECLARE_RATE_INFO(12, 1, 11, 18),
112 IWL_DECLARE_RATE_INFO(18, 2, 12, 24),
113 IWL_DECLARE_RATE_INFO(24, 3, 18, 36),
114 IWL_DECLARE_RATE_INFO(36, 4, 24, 48),
115 IWL_DECLARE_RATE_INFO(48, 5, 36, 54),
116 IWL_DECLARE_RATE_INFO(54, 6, 48, INV),
117 IWL_DECLARE_MCS_RATE(7),
118 IWL_DECLARE_MCS_RATE(8),
119 IWL_DECLARE_MCS_RATE(9),
120};
121
122enum rs_action {
123 RS_ACTION_STAY = 0,
124 RS_ACTION_DOWNSCALE = -1,
125 RS_ACTION_UPSCALE = 1,
126};
127
128enum rs_column_mode {
129 RS_INVALID = 0,
130 RS_LEGACY,
131 RS_SISO,
132 RS_MIMO2,
133};
134
135#define MAX_NEXT_COLUMNS 7
136#define MAX_COLUMN_CHECKS 3
137
138struct rs_tx_column;
139
140typedef bool (*allow_column_func_t) (struct iwl_mvm *mvm,
141 struct ieee80211_sta *sta,
142 struct rs_rate *rate,
143 const struct rs_tx_column *next_col);
144
145struct rs_tx_column {
146 enum rs_column_mode mode;
147 u8 ant;
148 bool sgi;
149 enum rs_column next_columns[MAX_NEXT_COLUMNS];
150 allow_column_func_t checks[MAX_COLUMN_CHECKS];
151};
152
153static bool rs_ant_allow(struct iwl_mvm *mvm, struct ieee80211_sta *sta,
154 struct rs_rate *rate,
155 const struct rs_tx_column *next_col)
156{
157 return iwl_mvm_bt_coex_is_ant_avail(mvm, next_col->ant);
158}
159
160static bool rs_mimo_allow(struct iwl_mvm *mvm, struct ieee80211_sta *sta,
161 struct rs_rate *rate,
162 const struct rs_tx_column *next_col)
163{
164 if (!sta->ht_cap.ht_supported)
165 return false;
166
167 if (sta->smps_mode == IEEE80211_SMPS_STATIC)
168 return false;
169
170 if (num_of_ant(iwl_mvm_get_valid_tx_ant(mvm)) < 2)
171 return false;
172
173 if (!iwl_mvm_bt_coex_is_mimo_allowed(mvm, sta))
174 return false;
175
176 if (mvm->nvm_data->sku_cap_mimo_disabled)
177 return false;
178
179 return true;
180}
181
182static bool rs_siso_allow(struct iwl_mvm *mvm, struct ieee80211_sta *sta,
183 struct rs_rate *rate,
184 const struct rs_tx_column *next_col)
185{
186 if (!sta->ht_cap.ht_supported)
187 return false;
188
189 return true;
190}
191
192static bool rs_sgi_allow(struct iwl_mvm *mvm, struct ieee80211_sta *sta,
193 struct rs_rate *rate,
194 const struct rs_tx_column *next_col)
195{
196 struct ieee80211_sta_ht_cap *ht_cap = &sta->ht_cap;
197 struct ieee80211_sta_vht_cap *vht_cap = &sta->vht_cap;
198
199 if (is_ht20(rate) && (ht_cap->cap &
200 IEEE80211_HT_CAP_SGI_20))
201 return true;
202 if (is_ht40(rate) && (ht_cap->cap &
203 IEEE80211_HT_CAP_SGI_40))
204 return true;
205 if (is_ht80(rate) && (vht_cap->cap &
206 IEEE80211_VHT_CAP_SHORT_GI_80))
207 return true;
208 if (is_ht160(rate) && (vht_cap->cap &
209 IEEE80211_VHT_CAP_SHORT_GI_160))
210 return true;
211
212 return false;
213}
214
215static const struct rs_tx_column rs_tx_columns[] = {
216 [RS_COLUMN_LEGACY_ANT_A] = {
217 .mode = RS_LEGACY,
218 .ant = ANT_A,
219 .next_columns = {
220 RS_COLUMN_LEGACY_ANT_B,
221 RS_COLUMN_SISO_ANT_A,
222 RS_COLUMN_MIMO2,
223 RS_COLUMN_INVALID,
224 RS_COLUMN_INVALID,
225 RS_COLUMN_INVALID,
226 RS_COLUMN_INVALID,
227 },
228 .checks = {
229 rs_ant_allow,
230 },
231 },
232 [RS_COLUMN_LEGACY_ANT_B] = {
233 .mode = RS_LEGACY,
234 .ant = ANT_B,
235 .next_columns = {
236 RS_COLUMN_LEGACY_ANT_A,
237 RS_COLUMN_SISO_ANT_B,
238 RS_COLUMN_MIMO2,
239 RS_COLUMN_INVALID,
240 RS_COLUMN_INVALID,
241 RS_COLUMN_INVALID,
242 RS_COLUMN_INVALID,
243 },
244 .checks = {
245 rs_ant_allow,
246 },
247 },
248 [RS_COLUMN_SISO_ANT_A] = {
249 .mode = RS_SISO,
250 .ant = ANT_A,
251 .next_columns = {
252 RS_COLUMN_SISO_ANT_B,
253 RS_COLUMN_MIMO2,
254 RS_COLUMN_SISO_ANT_A_SGI,
255 RS_COLUMN_LEGACY_ANT_A,
256 RS_COLUMN_LEGACY_ANT_B,
257 RS_COLUMN_INVALID,
258 RS_COLUMN_INVALID,
259 },
260 .checks = {
261 rs_siso_allow,
262 rs_ant_allow,
263 },
264 },
265 [RS_COLUMN_SISO_ANT_B] = {
266 .mode = RS_SISO,
267 .ant = ANT_B,
268 .next_columns = {
269 RS_COLUMN_SISO_ANT_A,
270 RS_COLUMN_MIMO2,
271 RS_COLUMN_SISO_ANT_B_SGI,
272 RS_COLUMN_LEGACY_ANT_A,
273 RS_COLUMN_LEGACY_ANT_B,
274 RS_COLUMN_INVALID,
275 RS_COLUMN_INVALID,
276 },
277 .checks = {
278 rs_siso_allow,
279 rs_ant_allow,
280 },
281 },
282 [RS_COLUMN_SISO_ANT_A_SGI] = {
283 .mode = RS_SISO,
284 .ant = ANT_A,
285 .sgi = true,
286 .next_columns = {
287 RS_COLUMN_SISO_ANT_B_SGI,
288 RS_COLUMN_MIMO2_SGI,
289 RS_COLUMN_SISO_ANT_A,
290 RS_COLUMN_LEGACY_ANT_A,
291 RS_COLUMN_LEGACY_ANT_B,
292 RS_COLUMN_INVALID,
293 RS_COLUMN_INVALID,
294 },
295 .checks = {
296 rs_siso_allow,
297 rs_ant_allow,
298 rs_sgi_allow,
299 },
300 },
301 [RS_COLUMN_SISO_ANT_B_SGI] = {
302 .mode = RS_SISO,
303 .ant = ANT_B,
304 .sgi = true,
305 .next_columns = {
306 RS_COLUMN_SISO_ANT_A_SGI,
307 RS_COLUMN_MIMO2_SGI,
308 RS_COLUMN_SISO_ANT_B,
309 RS_COLUMN_LEGACY_ANT_A,
310 RS_COLUMN_LEGACY_ANT_B,
311 RS_COLUMN_INVALID,
312 RS_COLUMN_INVALID,
313 },
314 .checks = {
315 rs_siso_allow,
316 rs_ant_allow,
317 rs_sgi_allow,
318 },
319 },
320 [RS_COLUMN_MIMO2] = {
321 .mode = RS_MIMO2,
322 .ant = ANT_AB,
323 .next_columns = {
324 RS_COLUMN_SISO_ANT_A,
325 RS_COLUMN_MIMO2_SGI,
326 RS_COLUMN_LEGACY_ANT_A,
327 RS_COLUMN_LEGACY_ANT_B,
328 RS_COLUMN_INVALID,
329 RS_COLUMN_INVALID,
330 RS_COLUMN_INVALID,
331 },
332 .checks = {
333 rs_mimo_allow,
334 },
335 },
336 [RS_COLUMN_MIMO2_SGI] = {
337 .mode = RS_MIMO2,
338 .ant = ANT_AB,
339 .sgi = true,
340 .next_columns = {
341 RS_COLUMN_SISO_ANT_A_SGI,
342 RS_COLUMN_MIMO2,
343 RS_COLUMN_LEGACY_ANT_A,
344 RS_COLUMN_LEGACY_ANT_B,
345 RS_COLUMN_INVALID,
346 RS_COLUMN_INVALID,
347 RS_COLUMN_INVALID,
348 },
349 .checks = {
350 rs_mimo_allow,
351 rs_sgi_allow,
352 },
353 },
354};
355
356static inline u8 rs_extract_rate(u32 rate_n_flags)
357{
358
359 return (u8)(rate_n_flags & RATE_LEGACY_RATE_MSK);
360}
361
362static int iwl_hwrate_to_plcp_idx(u32 rate_n_flags)
363{
364 int idx = 0;
365
366 if (rate_n_flags & RATE_MCS_HT_MSK) {
367 idx = rate_n_flags & RATE_HT_MCS_RATE_CODE_MSK;
368 idx += IWL_RATE_MCS_0_INDEX;
369
370
371 if (idx >= IWL_RATE_9M_INDEX)
372 idx += 1;
373 if ((idx >= IWL_FIRST_HT_RATE) && (idx <= IWL_LAST_HT_RATE))
374 return idx;
375 } else if (rate_n_flags & RATE_MCS_VHT_MSK) {
376 idx = rate_n_flags & RATE_VHT_MCS_RATE_CODE_MSK;
377 idx += IWL_RATE_MCS_0_INDEX;
378
379
380 if (idx >= IWL_RATE_9M_INDEX)
381 idx++;
382 if ((idx >= IWL_FIRST_VHT_RATE) && (idx <= IWL_LAST_VHT_RATE))
383 return idx;
384 } else {
385
386
387 u8 legacy_rate = rs_extract_rate(rate_n_flags);
388 for (idx = 0; idx < ARRAY_SIZE(iwl_rates); idx++)
389 if (iwl_rates[idx].plcp == legacy_rate)
390 return idx;
391 }
392
393 return IWL_RATE_INVALID;
394}
395
396static void rs_rate_scale_perform(struct iwl_mvm *mvm,
397 struct ieee80211_sta *sta,
398 struct iwl_lq_sta *lq_sta,
399 int tid, bool ndp);
400static void rs_fill_lq_cmd(struct iwl_mvm *mvm,
401 struct ieee80211_sta *sta,
402 struct iwl_lq_sta *lq_sta,
403 const struct rs_rate *initial_rate);
404static void rs_stay_in_table(struct iwl_lq_sta *lq_sta, bool force_search);
405
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415
416
417static const u16 expected_tpt_legacy[IWL_RATE_COUNT] = {
418 7, 13, 35, 58, 40, 57, 72, 98, 121, 154, 177, 186, 0, 0, 0
419};
420
421
422
423
424static const u16 expected_tpt_siso_20MHz[4][IWL_RATE_COUNT] = {
425 {0, 0, 0, 0, 42, 0, 76, 102, 124, 159, 183, 193, 202, 216, 0},
426 {0, 0, 0, 0, 46, 0, 82, 110, 132, 168, 192, 202, 210, 225, 0},
427 {0, 0, 0, 0, 49, 0, 97, 145, 192, 285, 375, 420, 464, 551, 0},
428 {0, 0, 0, 0, 54, 0, 108, 160, 213, 315, 415, 465, 513, 608, 0},
429};
430
431static const u16 expected_tpt_siso_40MHz[4][IWL_RATE_COUNT] = {
432 {0, 0, 0, 0, 77, 0, 127, 160, 184, 220, 242, 250, 257, 269, 275},
433 {0, 0, 0, 0, 83, 0, 135, 169, 193, 229, 250, 257, 264, 275, 280},
434 {0, 0, 0, 0, 101, 0, 199, 295, 389, 570, 744, 828, 911, 1070, 1173},
435 {0, 0, 0, 0, 112, 0, 220, 326, 429, 629, 819, 912, 1000, 1173, 1284},
436};
437
438static const u16 expected_tpt_siso_80MHz[4][IWL_RATE_COUNT] = {
439 {0, 0, 0, 0, 130, 0, 191, 223, 244, 273, 288, 294, 298, 305, 308},
440 {0, 0, 0, 0, 138, 0, 200, 231, 251, 279, 293, 298, 302, 308, 312},
441 {0, 0, 0, 0, 217, 0, 429, 634, 834, 1220, 1585, 1760, 1931, 2258, 2466},
442 {0, 0, 0, 0, 241, 0, 475, 701, 921, 1343, 1741, 1931, 2117, 2468, 2691},
443};
444
445static const u16 expected_tpt_siso_160MHz[4][IWL_RATE_COUNT] = {
446 {0, 0, 0, 0, 191, 0, 244, 288, 298, 308, 313, 318, 323, 328, 330},
447 {0, 0, 0, 0, 200, 0, 251, 293, 302, 312, 317, 322, 327, 332, 334},
448 {0, 0, 0, 0, 439, 0, 875, 1307, 1736, 2584, 3419, 3831, 4240, 5049, 5581},
449 {0, 0, 0, 0, 488, 0, 972, 1451, 1925, 2864, 3785, 4240, 4691, 5581, 6165},
450};
451
452static const u16 expected_tpt_mimo2_20MHz[4][IWL_RATE_COUNT] = {
453 {0, 0, 0, 0, 74, 0, 123, 155, 179, 213, 235, 243, 250, 261, 0},
454 {0, 0, 0, 0, 81, 0, 131, 164, 187, 221, 242, 250, 256, 267, 0},
455 {0, 0, 0, 0, 98, 0, 193, 286, 375, 550, 718, 799, 878, 1032, 0},
456 {0, 0, 0, 0, 109, 0, 214, 316, 414, 607, 790, 879, 965, 1132, 0},
457};
458
459static const u16 expected_tpt_mimo2_40MHz[4][IWL_RATE_COUNT] = {
460 {0, 0, 0, 0, 123, 0, 182, 214, 235, 264, 279, 285, 289, 296, 300},
461 {0, 0, 0, 0, 131, 0, 191, 222, 242, 270, 284, 289, 293, 300, 303},
462 {0, 0, 0, 0, 200, 0, 390, 571, 741, 1067, 1365, 1505, 1640, 1894, 2053},
463 {0, 0, 0, 0, 221, 0, 430, 630, 816, 1169, 1490, 1641, 1784, 2053, 2221},
464};
465
466static const u16 expected_tpt_mimo2_80MHz[4][IWL_RATE_COUNT] = {
467 {0, 0, 0, 0, 182, 0, 240, 264, 278, 299, 308, 311, 313, 317, 319},
468 {0, 0, 0, 0, 190, 0, 247, 269, 282, 302, 310, 313, 315, 319, 320},
469 {0, 0, 0, 0, 428, 0, 833, 1215, 1577, 2254, 2863, 3147, 3418, 3913, 4219},
470 {0, 0, 0, 0, 474, 0, 920, 1338, 1732, 2464, 3116, 3418, 3705, 4225, 4545},
471};
472
473static const u16 expected_tpt_mimo2_160MHz[4][IWL_RATE_COUNT] = {
474 {0, 0, 0, 0, 240, 0, 278, 308, 313, 319, 322, 324, 328, 330, 334},
475 {0, 0, 0, 0, 247, 0, 282, 310, 315, 320, 323, 325, 329, 332, 338},
476 {0, 0, 0, 0, 875, 0, 1735, 2582, 3414, 5043, 6619, 7389, 8147, 9629, 10592},
477 {0, 0, 0, 0, 971, 0, 1925, 2861, 3779, 5574, 7304, 8147, 8976, 10592, 11640},
478};
479
480
481static const struct iwl_rate_mcs_info iwl_rate_mcs[IWL_RATE_COUNT] = {
482 { "1", "BPSK DSSS"},
483 { "2", "QPSK DSSS"},
484 {"5.5", "BPSK CCK"},
485 { "11", "QPSK CCK"},
486 { "6", "BPSK 1/2"},
487 { "9", "BPSK 1/2"},
488 { "12", "QPSK 1/2"},
489 { "18", "QPSK 3/4"},
490 { "24", "16QAM 1/2"},
491 { "36", "16QAM 3/4"},
492 { "48", "64QAM 2/3"},
493 { "54", "64QAM 3/4"},
494 { "60", "64QAM 5/6"},
495};
496
497#define MCS_INDEX_PER_STREAM (8)
498
499static const char *rs_pretty_ant(u8 ant)
500{
501 static const char * const ant_name[] = {
502 [ANT_NONE] = "None",
503 [ANT_A] = "A",
504 [ANT_B] = "B",
505 [ANT_AB] = "AB",
506 [ANT_C] = "C",
507 [ANT_AC] = "AC",
508 [ANT_BC] = "BC",
509 [ANT_ABC] = "ABC",
510 };
511
512 if (ant > ANT_ABC)
513 return "UNKNOWN";
514
515 return ant_name[ant];
516}
517
518static const char *rs_pretty_lq_type(enum iwl_table_type type)
519{
520 static const char * const lq_types[] = {
521 [LQ_NONE] = "NONE",
522 [LQ_LEGACY_A] = "LEGACY_A",
523 [LQ_LEGACY_G] = "LEGACY_G",
524 [LQ_HT_SISO] = "HT SISO",
525 [LQ_HT_MIMO2] = "HT MIMO",
526 [LQ_VHT_SISO] = "VHT SISO",
527 [LQ_VHT_MIMO2] = "VHT MIMO",
528 };
529
530 if (type < LQ_NONE || type >= LQ_MAX)
531 return "UNKNOWN";
532
533 return lq_types[type];
534}
535
536static char *rs_pretty_rate(const struct rs_rate *rate)
537{
538 static char buf[40];
539 static const char * const legacy_rates[] = {
540 [IWL_RATE_1M_INDEX] = "1M",
541 [IWL_RATE_2M_INDEX] = "2M",
542 [IWL_RATE_5M_INDEX] = "5.5M",
543 [IWL_RATE_11M_INDEX] = "11M",
544 [IWL_RATE_6M_INDEX] = "6M",
545 [IWL_RATE_9M_INDEX] = "9M",
546 [IWL_RATE_12M_INDEX] = "12M",
547 [IWL_RATE_18M_INDEX] = "18M",
548 [IWL_RATE_24M_INDEX] = "24M",
549 [IWL_RATE_36M_INDEX] = "36M",
550 [IWL_RATE_48M_INDEX] = "48M",
551 [IWL_RATE_54M_INDEX] = "54M",
552 };
553 static const char *const ht_vht_rates[] = {
554 [IWL_RATE_MCS_0_INDEX] = "MCS0",
555 [IWL_RATE_MCS_1_INDEX] = "MCS1",
556 [IWL_RATE_MCS_2_INDEX] = "MCS2",
557 [IWL_RATE_MCS_3_INDEX] = "MCS3",
558 [IWL_RATE_MCS_4_INDEX] = "MCS4",
559 [IWL_RATE_MCS_5_INDEX] = "MCS5",
560 [IWL_RATE_MCS_6_INDEX] = "MCS6",
561 [IWL_RATE_MCS_7_INDEX] = "MCS7",
562 [IWL_RATE_MCS_8_INDEX] = "MCS8",
563 [IWL_RATE_MCS_9_INDEX] = "MCS9",
564 };
565 const char *rate_str;
566
567 if (is_type_legacy(rate->type) && (rate->index <= IWL_RATE_54M_INDEX))
568 rate_str = legacy_rates[rate->index];
569 else if ((is_type_ht(rate->type) || is_type_vht(rate->type)) &&
570 (rate->index >= IWL_RATE_MCS_0_INDEX) &&
571 (rate->index <= IWL_RATE_MCS_9_INDEX))
572 rate_str = ht_vht_rates[rate->index];
573 else
574 rate_str = "BAD_RATE";
575
576 sprintf(buf, "(%s|%s|%s)", rs_pretty_lq_type(rate->type),
577 rs_pretty_ant(rate->ant), rate_str);
578 return buf;
579}
580
581static inline void rs_dump_rate(struct iwl_mvm *mvm, const struct rs_rate *rate,
582 const char *prefix)
583{
584 IWL_DEBUG_RATE(mvm,
585 "%s: %s BW: %d SGI: %d LDPC: %d STBC: %d\n",
586 prefix, rs_pretty_rate(rate), rate->bw,
587 rate->sgi, rate->ldpc, rate->stbc);
588}
589
590static void rs_rate_scale_clear_window(struct iwl_rate_scale_data *window)
591{
592 window->data = 0;
593 window->success_counter = 0;
594 window->success_ratio = IWL_INVALID_VALUE;
595 window->counter = 0;
596 window->average_tpt = IWL_INVALID_VALUE;
597}
598
599static void rs_rate_scale_clear_tbl_windows(struct iwl_mvm *mvm,
600 struct iwl_scale_tbl_info *tbl)
601{
602 int i;
603
604 IWL_DEBUG_RATE(mvm, "Clearing up window stats\n");
605 for (i = 0; i < IWL_RATE_COUNT; i++)
606 rs_rate_scale_clear_window(&tbl->win[i]);
607
608 for (i = 0; i < ARRAY_SIZE(tbl->tpc_win); i++)
609 rs_rate_scale_clear_window(&tbl->tpc_win[i]);
610}
611
612static inline u8 rs_is_valid_ant(u8 valid_antenna, u8 ant_type)
613{
614 return (ant_type & valid_antenna) == ant_type;
615}
616
617static int rs_tl_turn_on_agg_for_tid(struct iwl_mvm *mvm,
618 struct iwl_lq_sta *lq_data, u8 tid,
619 struct ieee80211_sta *sta)
620{
621 int ret = -EAGAIN;
622
623 IWL_DEBUG_HT(mvm, "Starting Tx agg: STA: %pM tid: %d\n",
624 sta->addr, tid);
625
626
627 ret = ieee80211_start_tx_ba_session(sta, tid, 0);
628 if (ret == -EAGAIN) {
629
630
631
632
633
634 IWL_ERR(mvm, "Fail start Tx agg on tid: %d\n",
635 tid);
636 ieee80211_stop_tx_ba_session(sta, tid);
637 }
638 return ret;
639}
640
641static void rs_tl_turn_on_agg(struct iwl_mvm *mvm, struct iwl_mvm_sta *mvmsta,
642 u8 tid, struct iwl_lq_sta *lq_sta,
643 struct ieee80211_sta *sta)
644{
645 struct iwl_mvm_tid_data *tid_data;
646
647
648
649
650
651 if (WARN_ON_ONCE(tid > IWL_MAX_TID_COUNT)) {
652 IWL_ERR(mvm, "tid exceeds max TID count: %d/%d\n",
653 tid, IWL_MAX_TID_COUNT);
654 return;
655 } else if (tid == IWL_MAX_TID_COUNT) {
656 return;
657 }
658
659 tid_data = &mvmsta->tid_data[tid];
660 if ((tid_data->state == IWL_AGG_OFF) &&
661 (lq_sta->tx_agg_tid_en & BIT(tid)) &&
662 (tid_data->tx_count_last >= IWL_MVM_RS_AGG_START_THRESHOLD)) {
663 IWL_DEBUG_RATE(mvm, "try to aggregate tid %d\n", tid);
664 if (rs_tl_turn_on_agg_for_tid(mvm, lq_sta, tid, sta) == 0)
665 tid_data->state = IWL_AGG_QUEUED;
666 }
667}
668
669static inline int get_num_of_ant_from_rate(u32 rate_n_flags)
670{
671 return !!(rate_n_flags & RATE_MCS_ANT_A_MSK) +
672 !!(rate_n_flags & RATE_MCS_ANT_B_MSK) +
673 !!(rate_n_flags & RATE_MCS_ANT_C_MSK);
674}
675
676
677
678
679
680static s32 get_expected_tpt(struct iwl_scale_tbl_info *tbl, int rs_index)
681{
682 if (tbl->expected_tpt)
683 return tbl->expected_tpt[rs_index];
684 return 0;
685}
686
687
688
689
690
691
692
693
694static int _rs_collect_tx_data(struct iwl_mvm *mvm,
695 struct iwl_scale_tbl_info *tbl,
696 int scale_index, int attempts, int successes,
697 struct iwl_rate_scale_data *window)
698{
699 static const u64 mask = (((u64)1) << (IWL_RATE_MAX_WINDOW - 1));
700 s32 fail_count, tpt;
701
702
703 tpt = get_expected_tpt(tbl, scale_index);
704
705
706
707
708
709
710
711
712
713 while (attempts > 0) {
714 if (window->counter >= IWL_RATE_MAX_WINDOW) {
715
716 window->counter = IWL_RATE_MAX_WINDOW - 1;
717
718 if (window->data & mask) {
719 window->data &= ~mask;
720 window->success_counter--;
721 }
722 }
723
724
725 window->counter++;
726
727
728 window->data <<= 1;
729
730
731 if (successes > 0) {
732 window->success_counter++;
733 window->data |= 0x1;
734 successes--;
735 }
736
737 attempts--;
738 }
739
740
741 if (window->counter > 0)
742 window->success_ratio = 128 * (100 * window->success_counter)
743 / window->counter;
744 else
745 window->success_ratio = IWL_INVALID_VALUE;
746
747 fail_count = window->counter - window->success_counter;
748
749
750 if ((fail_count >= IWL_MVM_RS_RATE_MIN_FAILURE_TH) ||
751 (window->success_counter >= IWL_MVM_RS_RATE_MIN_SUCCESS_TH))
752 window->average_tpt = (window->success_ratio * tpt + 64) / 128;
753 else
754 window->average_tpt = IWL_INVALID_VALUE;
755
756 return 0;
757}
758
759static int rs_collect_tpc_data(struct iwl_mvm *mvm,
760 struct iwl_lq_sta *lq_sta,
761 struct iwl_scale_tbl_info *tbl,
762 int scale_index, int attempts, int successes,
763 u8 reduced_txp)
764{
765 struct iwl_rate_scale_data *window = NULL;
766
767 if (WARN_ON_ONCE(reduced_txp > TPC_MAX_REDUCTION))
768 return -EINVAL;
769
770 window = &tbl->tpc_win[reduced_txp];
771 return _rs_collect_tx_data(mvm, tbl, scale_index, attempts, successes,
772 window);
773}
774
775static void rs_update_tid_tpt_stats(struct iwl_mvm *mvm,
776 struct iwl_mvm_sta *mvmsta,
777 u8 tid, int successes)
778{
779 struct iwl_mvm_tid_data *tid_data;
780
781 if (tid >= IWL_MAX_TID_COUNT)
782 return;
783
784 tid_data = &mvmsta->tid_data[tid];
785
786
787
788
789
790
791
792 if (tid_data->state != IWL_AGG_OFF)
793 return;
794
795 if (time_is_before_jiffies(tid_data->tpt_meas_start + HZ) ||
796 (tid_data->tx_count >= IWL_MVM_RS_AGG_START_THRESHOLD)) {
797 tid_data->tx_count_last = tid_data->tx_count;
798 tid_data->tx_count = 0;
799 tid_data->tpt_meas_start = jiffies;
800 } else {
801 tid_data->tx_count += successes;
802 }
803}
804
805static int rs_collect_tlc_data(struct iwl_mvm *mvm,
806 struct iwl_mvm_sta *mvmsta, u8 tid,
807 struct iwl_scale_tbl_info *tbl,
808 int scale_index, int attempts, int successes)
809{
810 struct iwl_rate_scale_data *window = NULL;
811
812 if (scale_index < 0 || scale_index >= IWL_RATE_COUNT)
813 return -EINVAL;
814
815 if (tbl->column != RS_COLUMN_INVALID) {
816 struct lq_sta_pers *pers = &mvmsta->lq_sta.pers;
817
818 pers->tx_stats[tbl->column][scale_index].total += attempts;
819 pers->tx_stats[tbl->column][scale_index].success += successes;
820 }
821
822 rs_update_tid_tpt_stats(mvm, mvmsta, tid, successes);
823
824
825 window = &(tbl->win[scale_index]);
826 return _rs_collect_tx_data(mvm, tbl, scale_index, attempts, successes,
827 window);
828}
829
830
831static u32 ucode_rate_from_rs_rate(struct iwl_mvm *mvm,
832 struct rs_rate *rate)
833{
834 u32 ucode_rate = 0;
835 int index = rate->index;
836
837 ucode_rate |= ((rate->ant << RATE_MCS_ANT_POS) &
838 RATE_MCS_ANT_ABC_MSK);
839
840 if (is_legacy(rate)) {
841 ucode_rate |= iwl_rates[index].plcp;
842 if (index >= IWL_FIRST_CCK_RATE && index <= IWL_LAST_CCK_RATE)
843 ucode_rate |= RATE_MCS_CCK_MSK;
844 return ucode_rate;
845 }
846
847 if (is_ht(rate)) {
848 if (index < IWL_FIRST_HT_RATE || index > IWL_LAST_HT_RATE) {
849 IWL_ERR(mvm, "Invalid HT rate index %d\n", index);
850 index = IWL_LAST_HT_RATE;
851 }
852 ucode_rate |= RATE_MCS_HT_MSK;
853
854 if (is_ht_siso(rate))
855 ucode_rate |= iwl_rates[index].plcp_ht_siso;
856 else if (is_ht_mimo2(rate))
857 ucode_rate |= iwl_rates[index].plcp_ht_mimo2;
858 else
859 WARN_ON_ONCE(1);
860 } else if (is_vht(rate)) {
861 if (index < IWL_FIRST_VHT_RATE || index > IWL_LAST_VHT_RATE) {
862 IWL_ERR(mvm, "Invalid VHT rate index %d\n", index);
863 index = IWL_LAST_VHT_RATE;
864 }
865 ucode_rate |= RATE_MCS_VHT_MSK;
866 if (is_vht_siso(rate))
867 ucode_rate |= iwl_rates[index].plcp_vht_siso;
868 else if (is_vht_mimo2(rate))
869 ucode_rate |= iwl_rates[index].plcp_vht_mimo2;
870 else
871 WARN_ON_ONCE(1);
872
873 } else {
874 IWL_ERR(mvm, "Invalid rate->type %d\n", rate->type);
875 }
876
877 if (is_siso(rate) && rate->stbc) {
878
879 ucode_rate |= RATE_MCS_ANT_AB_MSK;
880 ucode_rate |= RATE_MCS_STBC_MSK;
881 }
882
883 ucode_rate |= rate->bw;
884 if (rate->sgi)
885 ucode_rate |= RATE_MCS_SGI_MSK;
886 if (rate->ldpc)
887 ucode_rate |= RATE_MCS_LDPC_MSK;
888
889 return ucode_rate;
890}
891
892
893static int rs_rate_from_ucode_rate(const u32 ucode_rate,
894 enum nl80211_band band,
895 struct rs_rate *rate)
896{
897 u32 ant_msk = ucode_rate & RATE_MCS_ANT_ABC_MSK;
898 u8 num_of_ant = get_num_of_ant_from_rate(ucode_rate);
899 u8 nss;
900
901 memset(rate, 0, sizeof(*rate));
902 rate->index = iwl_hwrate_to_plcp_idx(ucode_rate);
903
904 if (rate->index == IWL_RATE_INVALID)
905 return -EINVAL;
906
907 rate->ant = (ant_msk >> RATE_MCS_ANT_POS);
908
909
910 if (!(ucode_rate & RATE_MCS_HT_MSK) &&
911 !(ucode_rate & RATE_MCS_VHT_MSK)) {
912 if (num_of_ant == 1) {
913 if (band == NL80211_BAND_5GHZ)
914 rate->type = LQ_LEGACY_A;
915 else
916 rate->type = LQ_LEGACY_G;
917 }
918
919 return 0;
920 }
921
922
923 if (ucode_rate & RATE_MCS_SGI_MSK)
924 rate->sgi = true;
925 if (ucode_rate & RATE_MCS_LDPC_MSK)
926 rate->ldpc = true;
927 if (ucode_rate & RATE_MCS_STBC_MSK)
928 rate->stbc = true;
929 if (ucode_rate & RATE_MCS_BF_MSK)
930 rate->bfer = true;
931
932 rate->bw = ucode_rate & RATE_MCS_CHAN_WIDTH_MSK;
933
934 if (ucode_rate & RATE_MCS_HT_MSK) {
935 nss = ((ucode_rate & RATE_HT_MCS_NSS_MSK) >>
936 RATE_HT_MCS_NSS_POS) + 1;
937
938 if (nss == 1) {
939 rate->type = LQ_HT_SISO;
940 WARN_ONCE(!rate->stbc && !rate->bfer && num_of_ant != 1,
941 "stbc %d bfer %d",
942 rate->stbc, rate->bfer);
943 } else if (nss == 2) {
944 rate->type = LQ_HT_MIMO2;
945 WARN_ON_ONCE(num_of_ant != 2);
946 } else {
947 WARN_ON_ONCE(1);
948 }
949 } else if (ucode_rate & RATE_MCS_VHT_MSK) {
950 nss = ((ucode_rate & RATE_VHT_MCS_NSS_MSK) >>
951 RATE_VHT_MCS_NSS_POS) + 1;
952
953 if (nss == 1) {
954 rate->type = LQ_VHT_SISO;
955 WARN_ONCE(!rate->stbc && !rate->bfer && num_of_ant != 1,
956 "stbc %d bfer %d",
957 rate->stbc, rate->bfer);
958 } else if (nss == 2) {
959 rate->type = LQ_VHT_MIMO2;
960 WARN_ON_ONCE(num_of_ant != 2);
961 } else {
962 WARN_ON_ONCE(1);
963 }
964 }
965
966 WARN_ON_ONCE(rate->bw == RATE_MCS_CHAN_WIDTH_80 &&
967 !is_vht(rate));
968
969 return 0;
970}
971
972
973
974static int rs_toggle_antenna(u32 valid_ant, struct rs_rate *rate)
975{
976 u8 new_ant_type;
977
978 if (!rate->ant || rate->ant > ANT_ABC)
979 return 0;
980
981 if (!rs_is_valid_ant(valid_ant, rate->ant))
982 return 0;
983
984 new_ant_type = ant_toggle_lookup[rate->ant];
985
986 while ((new_ant_type != rate->ant) &&
987 !rs_is_valid_ant(valid_ant, new_ant_type))
988 new_ant_type = ant_toggle_lookup[new_ant_type];
989
990 if (new_ant_type == rate->ant)
991 return 0;
992
993 rate->ant = new_ant_type;
994
995 return 1;
996}
997
998static u16 rs_get_supported_rates(struct iwl_lq_sta *lq_sta,
999 struct rs_rate *rate)
1000{
1001 if (is_legacy(rate))
1002 return lq_sta->active_legacy_rate;
1003 else if (is_siso(rate))
1004 return lq_sta->active_siso_rate;
1005 else if (is_mimo2(rate))
1006 return lq_sta->active_mimo2_rate;
1007
1008 WARN_ON_ONCE(1);
1009 return 0;
1010}
1011
1012static u16 rs_get_adjacent_rate(struct iwl_mvm *mvm, u8 index, u16 rate_mask,
1013 int rate_type)
1014{
1015 u8 high = IWL_RATE_INVALID;
1016 u8 low = IWL_RATE_INVALID;
1017
1018
1019
1020 if (is_type_a_band(rate_type) || !is_type_legacy(rate_type)) {
1021 int i;
1022 u32 mask;
1023
1024
1025 i = index - 1;
1026 if (i >= 0)
1027 mask = BIT(i);
1028 for (; i >= 0; i--, mask >>= 1) {
1029 if (rate_mask & mask) {
1030 low = i;
1031 break;
1032 }
1033 }
1034
1035
1036 i = index + 1;
1037 for (mask = (1 << i); i < IWL_RATE_COUNT; i++, mask <<= 1) {
1038 if (rate_mask & mask) {
1039 high = i;
1040 break;
1041 }
1042 }
1043
1044 return (high << 8) | low;
1045 }
1046
1047 low = index;
1048 while (low != IWL_RATE_INVALID) {
1049 low = iwl_rates[low].prev_rs;
1050 if (low == IWL_RATE_INVALID)
1051 break;
1052 if (rate_mask & (1 << low))
1053 break;
1054 }
1055
1056 high = index;
1057 while (high != IWL_RATE_INVALID) {
1058 high = iwl_rates[high].next_rs;
1059 if (high == IWL_RATE_INVALID)
1060 break;
1061 if (rate_mask & (1 << high))
1062 break;
1063 }
1064
1065 return (high << 8) | low;
1066}
1067
1068static inline bool rs_rate_supported(struct iwl_lq_sta *lq_sta,
1069 struct rs_rate *rate)
1070{
1071 return BIT(rate->index) & rs_get_supported_rates(lq_sta, rate);
1072}
1073
1074
1075
1076
1077static bool rs_get_lower_rate_in_column(struct iwl_lq_sta *lq_sta,
1078 struct rs_rate *rate)
1079{
1080 u8 low;
1081 u16 high_low;
1082 u16 rate_mask;
1083 struct iwl_mvm *mvm = lq_sta->pers.drv;
1084
1085 rate_mask = rs_get_supported_rates(lq_sta, rate);
1086 high_low = rs_get_adjacent_rate(mvm, rate->index, rate_mask,
1087 rate->type);
1088 low = high_low & 0xff;
1089
1090
1091 if (low == IWL_RATE_INVALID)
1092 return true;
1093
1094 rate->index = low;
1095 return false;
1096}
1097
1098
1099static void rs_get_lower_rate_down_column(struct iwl_lq_sta *lq_sta,
1100 struct rs_rate *rate)
1101{
1102 struct iwl_mvm *mvm = lq_sta->pers.drv;
1103
1104 if (is_legacy(rate)) {
1105
1106 return;
1107 } else if (is_siso(rate)) {
1108
1109 if (lq_sta->band == NL80211_BAND_5GHZ)
1110 rate->type = LQ_LEGACY_A;
1111 else
1112 rate->type = LQ_LEGACY_G;
1113
1114 rate->bw = RATE_MCS_CHAN_WIDTH_20;
1115
1116 WARN_ON_ONCE(rate->index < IWL_RATE_MCS_0_INDEX ||
1117 rate->index > IWL_RATE_MCS_9_INDEX);
1118
1119 rate->index = rs_ht_to_legacy[rate->index];
1120 rate->ldpc = false;
1121 } else {
1122
1123 rate->type = is_vht_mimo2(rate) ?
1124 LQ_VHT_SISO : LQ_HT_SISO;
1125 }
1126
1127 if (num_of_ant(rate->ant) > 1)
1128 rate->ant = first_antenna(iwl_mvm_get_valid_tx_ant(mvm));
1129
1130
1131 rate->sgi = false;
1132
1133 if (!rs_rate_supported(lq_sta, rate))
1134 rs_get_lower_rate_in_column(lq_sta, rate);
1135}
1136
1137
1138static inline bool rs_rate_column_match(struct rs_rate *a,
1139 struct rs_rate *b)
1140{
1141 bool ant_match;
1142
1143 if (a->stbc || a->bfer)
1144 ant_match = (b->ant == ANT_A || b->ant == ANT_B);
1145 else
1146 ant_match = (a->ant == b->ant);
1147
1148 return (a->type == b->type) && (a->bw == b->bw) && (a->sgi == b->sgi)
1149 && ant_match;
1150}
1151
1152static inline enum rs_column rs_get_column_from_rate(struct rs_rate *rate)
1153{
1154 if (is_legacy(rate)) {
1155 if (rate->ant == ANT_A)
1156 return RS_COLUMN_LEGACY_ANT_A;
1157
1158 if (rate->ant == ANT_B)
1159 return RS_COLUMN_LEGACY_ANT_B;
1160
1161 goto err;
1162 }
1163
1164 if (is_siso(rate)) {
1165 if (rate->ant == ANT_A || rate->stbc || rate->bfer)
1166 return rate->sgi ? RS_COLUMN_SISO_ANT_A_SGI :
1167 RS_COLUMN_SISO_ANT_A;
1168
1169 if (rate->ant == ANT_B)
1170 return rate->sgi ? RS_COLUMN_SISO_ANT_B_SGI :
1171 RS_COLUMN_SISO_ANT_B;
1172
1173 goto err;
1174 }
1175
1176 if (is_mimo(rate))
1177 return rate->sgi ? RS_COLUMN_MIMO2_SGI : RS_COLUMN_MIMO2;
1178
1179err:
1180 return RS_COLUMN_INVALID;
1181}
1182
1183static u8 rs_get_tid(struct ieee80211_hdr *hdr)
1184{
1185 u8 tid = IWL_MAX_TID_COUNT;
1186
1187 if (ieee80211_is_data_qos(hdr->frame_control)) {
1188 u8 *qc = ieee80211_get_qos_ctl(hdr);
1189 tid = qc[0] & 0xf;
1190 }
1191
1192 if (unlikely(tid > IWL_MAX_TID_COUNT))
1193 tid = IWL_MAX_TID_COUNT;
1194
1195 return tid;
1196}
1197
1198void iwl_mvm_rs_tx_status(struct iwl_mvm *mvm, struct ieee80211_sta *sta,
1199 int tid, struct ieee80211_tx_info *info, bool ndp)
1200{
1201 int legacy_success;
1202 int retries;
1203 int i;
1204 struct iwl_lq_cmd *table;
1205 u32 lq_hwrate;
1206 struct rs_rate lq_rate, tx_resp_rate;
1207 struct iwl_scale_tbl_info *curr_tbl, *other_tbl, *tmp_tbl;
1208 u32 tlc_info = (uintptr_t)info->status.status_driver_data[0];
1209 u8 reduced_txp = tlc_info & RS_DRV_DATA_TXP_MSK;
1210 u8 lq_color = RS_DRV_DATA_LQ_COLOR_GET(tlc_info);
1211 u32 tx_resp_hwrate = (uintptr_t)info->status.status_driver_data[1];
1212 struct iwl_mvm_sta *mvmsta = iwl_mvm_sta_from_mac80211(sta);
1213 struct iwl_lq_sta *lq_sta = &mvmsta->lq_sta;
1214
1215
1216 if (!lq_sta) {
1217 IWL_DEBUG_RATE(mvm, "Station rate scaling not created yet.\n");
1218 return;
1219 } else if (!lq_sta->pers.drv) {
1220 IWL_DEBUG_RATE(mvm, "Rate scaling not initialized yet.\n");
1221 return;
1222 }
1223
1224
1225 if ((info->flags & IEEE80211_TX_CTL_AMPDU) &&
1226 !(info->flags & IEEE80211_TX_STAT_AMPDU))
1227 return;
1228
1229 rs_rate_from_ucode_rate(tx_resp_hwrate, info->band, &tx_resp_rate);
1230
1231#ifdef CONFIG_MAC80211_DEBUGFS
1232
1233
1234 if (lq_sta->pers.dbg_fixed_rate) {
1235 int index = tx_resp_rate.index;
1236 enum rs_column column;
1237 int attempts, success;
1238
1239 column = rs_get_column_from_rate(&tx_resp_rate);
1240 if (WARN_ONCE(column == RS_COLUMN_INVALID,
1241 "Can't map rate 0x%x to column",
1242 tx_resp_hwrate))
1243 return;
1244
1245 if (info->flags & IEEE80211_TX_STAT_AMPDU) {
1246 attempts = info->status.ampdu_len;
1247 success = info->status.ampdu_ack_len;
1248 } else {
1249 attempts = info->status.rates[0].count;
1250 success = !!(info->flags & IEEE80211_TX_STAT_ACK);
1251 }
1252
1253 lq_sta->pers.tx_stats[column][index].total += attempts;
1254 lq_sta->pers.tx_stats[column][index].success += success;
1255
1256 IWL_DEBUG_RATE(mvm, "Fixed rate 0x%x success %d attempts %d\n",
1257 tx_resp_hwrate, success, attempts);
1258 return;
1259 }
1260#endif
1261
1262 if (time_after(jiffies,
1263 (unsigned long)(lq_sta->last_tx +
1264 (IWL_MVM_RS_IDLE_TIMEOUT * HZ)))) {
1265 IWL_DEBUG_RATE(mvm, "Tx idle for too long. reinit rs\n");
1266 iwl_mvm_rs_rate_init(mvm, sta, info->band, false);
1267 return;
1268 }
1269 lq_sta->last_tx = jiffies;
1270
1271
1272
1273
1274
1275
1276
1277
1278 table = &lq_sta->lq;
1279 lq_hwrate = le32_to_cpu(table->rs_table[0]);
1280 rs_rate_from_ucode_rate(lq_hwrate, info->band, &lq_rate);
1281
1282
1283 if (lq_color != LQ_FLAG_COLOR_GET(table->flags)) {
1284 IWL_DEBUG_RATE(mvm,
1285 "tx resp color 0x%x does not match 0x%x\n",
1286 lq_color, LQ_FLAG_COLOR_GET(table->flags));
1287
1288
1289
1290
1291
1292
1293 lq_sta->missed_rate_counter++;
1294 if (lq_sta->missed_rate_counter > IWL_MVM_RS_MISSED_RATE_MAX) {
1295 lq_sta->missed_rate_counter = 0;
1296 IWL_DEBUG_RATE(mvm,
1297 "Too many rates mismatch. Send sync LQ. rs_state %d\n",
1298 lq_sta->rs_state);
1299 iwl_mvm_send_lq_cmd(mvm, &lq_sta->lq, false);
1300 }
1301
1302 return;
1303 } else
1304
1305 lq_sta->missed_rate_counter = 0;
1306
1307 if (!lq_sta->search_better_tbl) {
1308 curr_tbl = &(lq_sta->lq_info[lq_sta->active_tbl]);
1309 other_tbl = &(lq_sta->lq_info[1 - lq_sta->active_tbl]);
1310 } else {
1311 curr_tbl = &(lq_sta->lq_info[1 - lq_sta->active_tbl]);
1312 other_tbl = &(lq_sta->lq_info[lq_sta->active_tbl]);
1313 }
1314
1315 if (WARN_ON_ONCE(!rs_rate_column_match(&lq_rate, &curr_tbl->rate))) {
1316 IWL_DEBUG_RATE(mvm,
1317 "Neither active nor search matches tx rate\n");
1318 tmp_tbl = &(lq_sta->lq_info[lq_sta->active_tbl]);
1319 rs_dump_rate(mvm, &tmp_tbl->rate, "ACTIVE");
1320 tmp_tbl = &(lq_sta->lq_info[1 - lq_sta->active_tbl]);
1321 rs_dump_rate(mvm, &tmp_tbl->rate, "SEARCH");
1322 rs_dump_rate(mvm, &lq_rate, "ACTUAL");
1323
1324
1325
1326
1327
1328 rs_stay_in_table(lq_sta, true);
1329 goto done;
1330 }
1331
1332
1333
1334
1335
1336
1337
1338
1339 if (info->flags & IEEE80211_TX_STAT_AMPDU) {
1340 rs_collect_tpc_data(mvm, lq_sta, curr_tbl, tx_resp_rate.index,
1341 info->status.ampdu_len,
1342 info->status.ampdu_ack_len,
1343 reduced_txp);
1344
1345
1346
1347
1348
1349
1350
1351
1352
1353
1354
1355
1356
1357
1358 if (info->status.ampdu_ack_len == 0)
1359 info->status.ampdu_len = 1;
1360
1361 rs_collect_tlc_data(mvm, mvmsta, tid, curr_tbl, tx_resp_rate.index,
1362 info->status.ampdu_len,
1363 info->status.ampdu_ack_len);
1364
1365
1366 if (lq_sta->rs_state == RS_STATE_STAY_IN_COLUMN) {
1367 lq_sta->total_success += info->status.ampdu_ack_len;
1368 lq_sta->total_failed += (info->status.ampdu_len -
1369 info->status.ampdu_ack_len);
1370 }
1371 } else {
1372
1373 retries = info->status.rates[0].count - 1;
1374
1375 retries = min(retries, 15);
1376
1377
1378 legacy_success = !!(info->flags & IEEE80211_TX_STAT_ACK);
1379
1380 for (i = 0; i <= retries; ++i) {
1381 lq_hwrate = le32_to_cpu(table->rs_table[i]);
1382 rs_rate_from_ucode_rate(lq_hwrate, info->band,
1383 &lq_rate);
1384
1385
1386
1387
1388 if (rs_rate_column_match(&lq_rate, &curr_tbl->rate))
1389 tmp_tbl = curr_tbl;
1390 else if (rs_rate_column_match(&lq_rate,
1391 &other_tbl->rate))
1392 tmp_tbl = other_tbl;
1393 else
1394 continue;
1395
1396 rs_collect_tpc_data(mvm, lq_sta, tmp_tbl,
1397 tx_resp_rate.index, 1,
1398 i < retries ? 0 : legacy_success,
1399 reduced_txp);
1400 rs_collect_tlc_data(mvm, mvmsta, tid, tmp_tbl,
1401 tx_resp_rate.index, 1,
1402 i < retries ? 0 : legacy_success);
1403 }
1404
1405
1406 if (lq_sta->rs_state == RS_STATE_STAY_IN_COLUMN) {
1407 lq_sta->total_success += legacy_success;
1408 lq_sta->total_failed += retries + (1 - legacy_success);
1409 }
1410 }
1411
1412 lq_sta->last_rate_n_flags = lq_hwrate;
1413 IWL_DEBUG_RATE(mvm, "reduced txpower: %d\n", reduced_txp);
1414done:
1415
1416 if (sta->supp_rates[info->band])
1417 rs_rate_scale_perform(mvm, sta, lq_sta, tid, ndp);
1418}
1419
1420
1421
1422
1423static void rs_mac80211_tx_status(void *mvm_r,
1424 struct ieee80211_supported_band *sband,
1425 struct ieee80211_sta *sta, void *priv_sta,
1426 struct sk_buff *skb)
1427{
1428 struct ieee80211_hdr *hdr = (struct ieee80211_hdr *)skb->data;
1429 struct iwl_op_mode *op_mode = (struct iwl_op_mode *)mvm_r;
1430 struct iwl_mvm *mvm = IWL_OP_MODE_GET_MVM(op_mode);
1431 struct ieee80211_tx_info *info = IEEE80211_SKB_CB(skb);
1432
1433 if (!iwl_mvm_sta_from_mac80211(sta)->vif)
1434 return;
1435
1436 if (!ieee80211_is_data(hdr->frame_control) ||
1437 info->flags & IEEE80211_TX_CTL_NO_ACK)
1438 return;
1439
1440 iwl_mvm_rs_tx_status(mvm, sta, rs_get_tid(hdr), info,
1441 ieee80211_is_qos_nullfunc(hdr->frame_control));
1442}
1443
1444
1445
1446
1447
1448
1449
1450
1451
1452static void rs_set_stay_in_table(struct iwl_mvm *mvm, u8 is_legacy,
1453 struct iwl_lq_sta *lq_sta)
1454{
1455 IWL_DEBUG_RATE(mvm, "Moving to RS_STATE_STAY_IN_COLUMN\n");
1456 lq_sta->rs_state = RS_STATE_STAY_IN_COLUMN;
1457 if (is_legacy) {
1458 lq_sta->table_count_limit = IWL_MVM_RS_LEGACY_TABLE_COUNT;
1459 lq_sta->max_failure_limit = IWL_MVM_RS_LEGACY_FAILURE_LIMIT;
1460 lq_sta->max_success_limit = IWL_MVM_RS_LEGACY_SUCCESS_LIMIT;
1461 } else {
1462 lq_sta->table_count_limit = IWL_MVM_RS_NON_LEGACY_TABLE_COUNT;
1463 lq_sta->max_failure_limit = IWL_MVM_RS_NON_LEGACY_FAILURE_LIMIT;
1464 lq_sta->max_success_limit = IWL_MVM_RS_NON_LEGACY_SUCCESS_LIMIT;
1465 }
1466 lq_sta->table_count = 0;
1467 lq_sta->total_failed = 0;
1468 lq_sta->total_success = 0;
1469 lq_sta->flush_timer = jiffies;
1470 lq_sta->visited_columns = 0;
1471}
1472
1473static inline int rs_get_max_rate_from_mask(unsigned long rate_mask)
1474{
1475 if (rate_mask)
1476 return find_last_bit(&rate_mask, BITS_PER_LONG);
1477 return IWL_RATE_INVALID;
1478}
1479
1480static int rs_get_max_allowed_rate(struct iwl_lq_sta *lq_sta,
1481 const struct rs_tx_column *column)
1482{
1483 switch (column->mode) {
1484 case RS_LEGACY:
1485 return lq_sta->max_legacy_rate_idx;
1486 case RS_SISO:
1487 return lq_sta->max_siso_rate_idx;
1488 case RS_MIMO2:
1489 return lq_sta->max_mimo2_rate_idx;
1490 default:
1491 WARN_ON_ONCE(1);
1492 }
1493
1494 return lq_sta->max_legacy_rate_idx;
1495}
1496
1497static const u16 *rs_get_expected_tpt_table(struct iwl_lq_sta *lq_sta,
1498 const struct rs_tx_column *column,
1499 u32 bw)
1500{
1501
1502 const u16 (*ht_tbl_pointer)[IWL_RATE_COUNT];
1503
1504 if (WARN_ON_ONCE(column->mode != RS_LEGACY &&
1505 column->mode != RS_SISO &&
1506 column->mode != RS_MIMO2))
1507 return expected_tpt_legacy;
1508
1509
1510 if (column->mode == RS_LEGACY)
1511 return expected_tpt_legacy;
1512
1513 ht_tbl_pointer = expected_tpt_mimo2_20MHz;
1514
1515
1516
1517 if (column->mode == RS_SISO) {
1518 switch (bw) {
1519 case RATE_MCS_CHAN_WIDTH_20:
1520 ht_tbl_pointer = expected_tpt_siso_20MHz;
1521 break;
1522 case RATE_MCS_CHAN_WIDTH_40:
1523 ht_tbl_pointer = expected_tpt_siso_40MHz;
1524 break;
1525 case RATE_MCS_CHAN_WIDTH_80:
1526 ht_tbl_pointer = expected_tpt_siso_80MHz;
1527 break;
1528 case RATE_MCS_CHAN_WIDTH_160:
1529 ht_tbl_pointer = expected_tpt_siso_160MHz;
1530 break;
1531 default:
1532 WARN_ON_ONCE(1);
1533 }
1534 } else if (column->mode == RS_MIMO2) {
1535 switch (bw) {
1536 case RATE_MCS_CHAN_WIDTH_20:
1537 ht_tbl_pointer = expected_tpt_mimo2_20MHz;
1538 break;
1539 case RATE_MCS_CHAN_WIDTH_40:
1540 ht_tbl_pointer = expected_tpt_mimo2_40MHz;
1541 break;
1542 case RATE_MCS_CHAN_WIDTH_80:
1543 ht_tbl_pointer = expected_tpt_mimo2_80MHz;
1544 break;
1545 case RATE_MCS_CHAN_WIDTH_160:
1546 ht_tbl_pointer = expected_tpt_mimo2_160MHz;
1547 break;
1548 default:
1549 WARN_ON_ONCE(1);
1550 }
1551 } else {
1552 WARN_ON_ONCE(1);
1553 }
1554
1555 if (!column->sgi && !lq_sta->is_agg)
1556 return ht_tbl_pointer[0];
1557 else if (column->sgi && !lq_sta->is_agg)
1558 return ht_tbl_pointer[1];
1559 else if (!column->sgi && lq_sta->is_agg)
1560 return ht_tbl_pointer[2];
1561 else
1562 return ht_tbl_pointer[3];
1563}
1564
1565static void rs_set_expected_tpt_table(struct iwl_lq_sta *lq_sta,
1566 struct iwl_scale_tbl_info *tbl)
1567{
1568 struct rs_rate *rate = &tbl->rate;
1569 const struct rs_tx_column *column = &rs_tx_columns[tbl->column];
1570
1571 tbl->expected_tpt = rs_get_expected_tpt_table(lq_sta, column, rate->bw);
1572}
1573
1574static s32 rs_get_best_rate(struct iwl_mvm *mvm,
1575 struct iwl_lq_sta *lq_sta,
1576 struct iwl_scale_tbl_info *tbl,
1577 unsigned long rate_mask, s8 index)
1578{
1579 struct iwl_scale_tbl_info *active_tbl =
1580 &(lq_sta->lq_info[lq_sta->active_tbl]);
1581 s32 success_ratio = active_tbl->win[index].success_ratio;
1582 u16 expected_current_tpt = active_tbl->expected_tpt[index];
1583 const u16 *tpt_tbl = tbl->expected_tpt;
1584 u16 high_low;
1585 u32 target_tpt;
1586 int rate_idx;
1587
1588 if (success_ratio >= RS_PERCENT(IWL_MVM_RS_SR_NO_DECREASE)) {
1589 target_tpt = 100 * expected_current_tpt;
1590 IWL_DEBUG_RATE(mvm,
1591 "SR %d high. Find rate exceeding EXPECTED_CURRENT %d\n",
1592 success_ratio, target_tpt);
1593 } else {
1594 target_tpt = lq_sta->last_tpt;
1595 IWL_DEBUG_RATE(mvm,
1596 "SR %d not that good. Find rate exceeding ACTUAL_TPT %d\n",
1597 success_ratio, target_tpt);
1598 }
1599
1600 rate_idx = find_first_bit(&rate_mask, BITS_PER_LONG);
1601
1602 while (rate_idx != IWL_RATE_INVALID) {
1603 if (target_tpt < (100 * tpt_tbl[rate_idx]))
1604 break;
1605
1606 high_low = rs_get_adjacent_rate(mvm, rate_idx, rate_mask,
1607 tbl->rate.type);
1608
1609 rate_idx = (high_low >> 8) & 0xff;
1610 }
1611
1612 IWL_DEBUG_RATE(mvm, "Best rate found %d target_tp %d expected_new %d\n",
1613 rate_idx, target_tpt,
1614 rate_idx != IWL_RATE_INVALID ?
1615 100 * tpt_tbl[rate_idx] : IWL_INVALID_VALUE);
1616
1617 return rate_idx;
1618}
1619
1620static u32 rs_bw_from_sta_bw(struct ieee80211_sta *sta)
1621{
1622 switch (sta->bandwidth) {
1623 case IEEE80211_STA_RX_BW_160:
1624 return RATE_MCS_CHAN_WIDTH_160;
1625 case IEEE80211_STA_RX_BW_80:
1626 return RATE_MCS_CHAN_WIDTH_80;
1627 case IEEE80211_STA_RX_BW_40:
1628 return RATE_MCS_CHAN_WIDTH_40;
1629 case IEEE80211_STA_RX_BW_20:
1630 default:
1631 return RATE_MCS_CHAN_WIDTH_20;
1632 }
1633}
1634
1635
1636
1637
1638
1639
1640
1641
1642static void rs_stay_in_table(struct iwl_lq_sta *lq_sta, bool force_search)
1643{
1644 struct iwl_scale_tbl_info *tbl;
1645 int active_tbl;
1646 int flush_interval_passed = 0;
1647 struct iwl_mvm *mvm;
1648
1649 mvm = lq_sta->pers.drv;
1650 active_tbl = lq_sta->active_tbl;
1651
1652 tbl = &(lq_sta->lq_info[active_tbl]);
1653
1654
1655 if (lq_sta->rs_state == RS_STATE_STAY_IN_COLUMN) {
1656
1657 if (lq_sta->flush_timer)
1658 flush_interval_passed =
1659 time_after(jiffies,
1660 (unsigned long)(lq_sta->flush_timer +
1661 (IWL_MVM_RS_STAY_IN_COLUMN_TIMEOUT * HZ)));
1662
1663
1664
1665
1666
1667
1668
1669
1670
1671 if (force_search ||
1672 (lq_sta->total_failed > lq_sta->max_failure_limit) ||
1673 (lq_sta->total_success > lq_sta->max_success_limit) ||
1674 ((!lq_sta->search_better_tbl) &&
1675 (lq_sta->flush_timer) && (flush_interval_passed))) {
1676 IWL_DEBUG_RATE(mvm,
1677 "LQ: stay is expired %d %d %d\n",
1678 lq_sta->total_failed,
1679 lq_sta->total_success,
1680 flush_interval_passed);
1681
1682
1683 lq_sta->rs_state = RS_STATE_SEARCH_CYCLE_STARTED;
1684 IWL_DEBUG_RATE(mvm,
1685 "Moving to RS_STATE_SEARCH_CYCLE_STARTED\n");
1686 lq_sta->total_failed = 0;
1687 lq_sta->total_success = 0;
1688 lq_sta->flush_timer = 0;
1689
1690 lq_sta->visited_columns = BIT(tbl->column);
1691
1692
1693
1694
1695
1696
1697 } else {
1698 lq_sta->table_count++;
1699 if (lq_sta->table_count >=
1700 lq_sta->table_count_limit) {
1701 lq_sta->table_count = 0;
1702
1703 IWL_DEBUG_RATE(mvm,
1704 "LQ: stay in table clear win\n");
1705 rs_rate_scale_clear_tbl_windows(mvm, tbl);
1706 }
1707 }
1708
1709
1710
1711
1712 if (lq_sta->rs_state == RS_STATE_SEARCH_CYCLE_STARTED) {
1713 rs_rate_scale_clear_tbl_windows(mvm, tbl);
1714 }
1715 }
1716}
1717
1718static void rs_set_amsdu_len(struct iwl_mvm *mvm, struct ieee80211_sta *sta,
1719 struct iwl_scale_tbl_info *tbl,
1720 enum rs_action scale_action)
1721{
1722 struct iwl_mvm_sta *mvmsta = iwl_mvm_sta_from_mac80211(sta);
1723
1724 if ((!is_vht(&tbl->rate) && !is_ht(&tbl->rate)) ||
1725 tbl->rate.index < IWL_RATE_MCS_5_INDEX ||
1726 scale_action == RS_ACTION_DOWNSCALE)
1727 mvmsta->tlc_amsdu = false;
1728 else
1729 mvmsta->tlc_amsdu = true;
1730}
1731
1732
1733
1734
1735static void rs_update_rate_tbl(struct iwl_mvm *mvm,
1736 struct ieee80211_sta *sta,
1737 struct iwl_lq_sta *lq_sta,
1738 struct iwl_scale_tbl_info *tbl)
1739{
1740 rs_fill_lq_cmd(mvm, sta, lq_sta, &tbl->rate);
1741 iwl_mvm_send_lq_cmd(mvm, &lq_sta->lq, false);
1742}
1743
1744static bool rs_tweak_rate_tbl(struct iwl_mvm *mvm,
1745 struct ieee80211_sta *sta,
1746 struct iwl_lq_sta *lq_sta,
1747 struct iwl_scale_tbl_info *tbl,
1748 enum rs_action scale_action)
1749{
1750 if (sta->bandwidth != IEEE80211_STA_RX_BW_80)
1751 return false;
1752
1753 if (!is_vht_siso(&tbl->rate))
1754 return false;
1755
1756 if ((tbl->rate.bw == RATE_MCS_CHAN_WIDTH_80) &&
1757 (tbl->rate.index == IWL_RATE_MCS_0_INDEX) &&
1758 (scale_action == RS_ACTION_DOWNSCALE)) {
1759 tbl->rate.bw = RATE_MCS_CHAN_WIDTH_20;
1760 tbl->rate.index = IWL_RATE_MCS_4_INDEX;
1761 IWL_DEBUG_RATE(mvm, "Switch 80Mhz SISO MCS0 -> 20Mhz MCS4\n");
1762 goto tweaked;
1763 }
1764
1765
1766
1767
1768
1769
1770 if ((tbl->rate.bw == RATE_MCS_CHAN_WIDTH_20) &&
1771 (((tbl->rate.index == IWL_RATE_MCS_5_INDEX) &&
1772 (scale_action == RS_ACTION_STAY)) ||
1773 ((tbl->rate.index > IWL_RATE_MCS_5_INDEX) &&
1774 (scale_action == RS_ACTION_UPSCALE)))) {
1775 tbl->rate.bw = RATE_MCS_CHAN_WIDTH_80;
1776 tbl->rate.index = IWL_RATE_MCS_1_INDEX;
1777 IWL_DEBUG_RATE(mvm, "Switch 20Mhz SISO MCS5 -> 80Mhz MCS1\n");
1778 goto tweaked;
1779 }
1780
1781 return false;
1782
1783tweaked:
1784 rs_set_expected_tpt_table(lq_sta, tbl);
1785 rs_rate_scale_clear_tbl_windows(mvm, tbl);
1786 return true;
1787}
1788
1789static enum rs_column rs_get_next_column(struct iwl_mvm *mvm,
1790 struct iwl_lq_sta *lq_sta,
1791 struct ieee80211_sta *sta,
1792 struct iwl_scale_tbl_info *tbl)
1793{
1794 int i, j, max_rate;
1795 enum rs_column next_col_id;
1796 const struct rs_tx_column *curr_col = &rs_tx_columns[tbl->column];
1797 const struct rs_tx_column *next_col;
1798 allow_column_func_t allow_func;
1799 u8 valid_ants = iwl_mvm_get_valid_tx_ant(mvm);
1800 const u16 *expected_tpt_tbl;
1801 u16 tpt, max_expected_tpt;
1802
1803 for (i = 0; i < MAX_NEXT_COLUMNS; i++) {
1804 next_col_id = curr_col->next_columns[i];
1805
1806 if (next_col_id == RS_COLUMN_INVALID)
1807 continue;
1808
1809 if (lq_sta->visited_columns & BIT(next_col_id)) {
1810 IWL_DEBUG_RATE(mvm, "Skip already visited column %d\n",
1811 next_col_id);
1812 continue;
1813 }
1814
1815 next_col = &rs_tx_columns[next_col_id];
1816
1817 if (!rs_is_valid_ant(valid_ants, next_col->ant)) {
1818 IWL_DEBUG_RATE(mvm,
1819 "Skip column %d as ANT config isn't supported by chip. valid_ants 0x%x column ant 0x%x\n",
1820 next_col_id, valid_ants, next_col->ant);
1821 continue;
1822 }
1823
1824 for (j = 0; j < MAX_COLUMN_CHECKS; j++) {
1825 allow_func = next_col->checks[j];
1826 if (allow_func && !allow_func(mvm, sta, &tbl->rate,
1827 next_col))
1828 break;
1829 }
1830
1831 if (j != MAX_COLUMN_CHECKS) {
1832 IWL_DEBUG_RATE(mvm,
1833 "Skip column %d: not allowed (check %d failed)\n",
1834 next_col_id, j);
1835
1836 continue;
1837 }
1838
1839 tpt = lq_sta->last_tpt / 100;
1840 expected_tpt_tbl = rs_get_expected_tpt_table(lq_sta, next_col,
1841 rs_bw_from_sta_bw(sta));
1842 if (WARN_ON_ONCE(!expected_tpt_tbl))
1843 continue;
1844
1845 max_rate = rs_get_max_allowed_rate(lq_sta, next_col);
1846 if (max_rate == IWL_RATE_INVALID) {
1847 IWL_DEBUG_RATE(mvm,
1848 "Skip column %d: no rate is allowed in this column\n",
1849 next_col_id);
1850 continue;
1851 }
1852
1853 max_expected_tpt = expected_tpt_tbl[max_rate];
1854 if (tpt >= max_expected_tpt) {
1855 IWL_DEBUG_RATE(mvm,
1856 "Skip column %d: can't beat current TPT. Max expected %d current %d\n",
1857 next_col_id, max_expected_tpt, tpt);
1858 continue;
1859 }
1860
1861 IWL_DEBUG_RATE(mvm,
1862 "Found potential column %d. Max expected %d current %d\n",
1863 next_col_id, max_expected_tpt, tpt);
1864 break;
1865 }
1866
1867 if (i == MAX_NEXT_COLUMNS)
1868 return RS_COLUMN_INVALID;
1869
1870 return next_col_id;
1871}
1872
1873static int rs_switch_to_column(struct iwl_mvm *mvm,
1874 struct iwl_lq_sta *lq_sta,
1875 struct ieee80211_sta *sta,
1876 enum rs_column col_id)
1877{
1878 struct iwl_scale_tbl_info *tbl = &(lq_sta->lq_info[lq_sta->active_tbl]);
1879 struct iwl_scale_tbl_info *search_tbl =
1880 &(lq_sta->lq_info[(1 - lq_sta->active_tbl)]);
1881 struct rs_rate *rate = &search_tbl->rate;
1882 const struct rs_tx_column *column = &rs_tx_columns[col_id];
1883 const struct rs_tx_column *curr_column = &rs_tx_columns[tbl->column];
1884 u32 sz = (sizeof(struct iwl_scale_tbl_info) -
1885 (sizeof(struct iwl_rate_scale_data) * IWL_RATE_COUNT));
1886 unsigned long rate_mask = 0;
1887 u32 rate_idx = 0;
1888
1889 memcpy(search_tbl, tbl, sz);
1890
1891 rate->sgi = column->sgi;
1892 rate->ant = column->ant;
1893
1894 if (column->mode == RS_LEGACY) {
1895 if (lq_sta->band == NL80211_BAND_5GHZ)
1896 rate->type = LQ_LEGACY_A;
1897 else
1898 rate->type = LQ_LEGACY_G;
1899
1900 rate->bw = RATE_MCS_CHAN_WIDTH_20;
1901 rate->ldpc = false;
1902 rate_mask = lq_sta->active_legacy_rate;
1903 } else if (column->mode == RS_SISO) {
1904 rate->type = lq_sta->is_vht ? LQ_VHT_SISO : LQ_HT_SISO;
1905 rate_mask = lq_sta->active_siso_rate;
1906 } else if (column->mode == RS_MIMO2) {
1907 rate->type = lq_sta->is_vht ? LQ_VHT_MIMO2 : LQ_HT_MIMO2;
1908 rate_mask = lq_sta->active_mimo2_rate;
1909 } else {
1910 WARN_ONCE(1, "Bad column mode");
1911 }
1912
1913 if (column->mode != RS_LEGACY) {
1914 rate->bw = rs_bw_from_sta_bw(sta);
1915 rate->ldpc = lq_sta->ldpc;
1916 }
1917
1918 search_tbl->column = col_id;
1919 rs_set_expected_tpt_table(lq_sta, search_tbl);
1920
1921 lq_sta->visited_columns |= BIT(col_id);
1922
1923
1924
1925
1926 if (curr_column->mode != column->mode) {
1927 rate_idx = rs_get_best_rate(mvm, lq_sta, search_tbl,
1928 rate_mask, rate->index);
1929
1930 if ((rate_idx == IWL_RATE_INVALID) ||
1931 !(BIT(rate_idx) & rate_mask)) {
1932 IWL_DEBUG_RATE(mvm,
1933 "can not switch with index %d"
1934 " rate mask %lx\n",
1935 rate_idx, rate_mask);
1936
1937 goto err;
1938 }
1939
1940 rate->index = rate_idx;
1941 }
1942
1943 IWL_DEBUG_RATE(mvm, "Switched to column %d: Index %d\n",
1944 col_id, rate->index);
1945
1946 return 0;
1947
1948err:
1949 rate->type = LQ_NONE;
1950 return -1;
1951}
1952
1953static enum rs_action rs_get_rate_action(struct iwl_mvm *mvm,
1954 struct iwl_scale_tbl_info *tbl,
1955 s32 sr, int low, int high,
1956 int current_tpt,
1957 int low_tpt, int high_tpt)
1958{
1959 enum rs_action action = RS_ACTION_STAY;
1960
1961 if ((sr <= RS_PERCENT(IWL_MVM_RS_SR_FORCE_DECREASE)) ||
1962 (current_tpt == 0)) {
1963 IWL_DEBUG_RATE(mvm,
1964 "Decrease rate because of low SR\n");
1965 return RS_ACTION_DOWNSCALE;
1966 }
1967
1968 if ((low_tpt == IWL_INVALID_VALUE) &&
1969 (high_tpt == IWL_INVALID_VALUE) &&
1970 (high != IWL_RATE_INVALID)) {
1971 IWL_DEBUG_RATE(mvm,
1972 "No data about high/low rates. Increase rate\n");
1973 return RS_ACTION_UPSCALE;
1974 }
1975
1976 if ((high_tpt == IWL_INVALID_VALUE) &&
1977 (high != IWL_RATE_INVALID) &&
1978 (low_tpt != IWL_INVALID_VALUE) &&
1979 (low_tpt < current_tpt)) {
1980 IWL_DEBUG_RATE(mvm,
1981 "No data about high rate and low rate is worse. Increase rate\n");
1982 return RS_ACTION_UPSCALE;
1983 }
1984
1985 if ((high_tpt != IWL_INVALID_VALUE) &&
1986 (high_tpt > current_tpt)) {
1987 IWL_DEBUG_RATE(mvm,
1988 "Higher rate is better. Increate rate\n");
1989 return RS_ACTION_UPSCALE;
1990 }
1991
1992 if ((low_tpt != IWL_INVALID_VALUE) &&
1993 (high_tpt != IWL_INVALID_VALUE) &&
1994 (low_tpt < current_tpt) &&
1995 (high_tpt < current_tpt)) {
1996 IWL_DEBUG_RATE(mvm,
1997 "Both high and low are worse. Maintain rate\n");
1998 return RS_ACTION_STAY;
1999 }
2000
2001 if ((low_tpt != IWL_INVALID_VALUE) &&
2002 (low_tpt > current_tpt)) {
2003 IWL_DEBUG_RATE(mvm,
2004 "Lower rate is better\n");
2005 action = RS_ACTION_DOWNSCALE;
2006 goto out;
2007 }
2008
2009 if ((low_tpt == IWL_INVALID_VALUE) &&
2010 (low != IWL_RATE_INVALID)) {
2011 IWL_DEBUG_RATE(mvm,
2012 "No data about lower rate\n");
2013 action = RS_ACTION_DOWNSCALE;
2014 goto out;
2015 }
2016
2017 IWL_DEBUG_RATE(mvm, "Maintain rate\n");
2018
2019out:
2020 if ((action == RS_ACTION_DOWNSCALE) && (low != IWL_RATE_INVALID)) {
2021 if (sr >= RS_PERCENT(IWL_MVM_RS_SR_NO_DECREASE)) {
2022 IWL_DEBUG_RATE(mvm,
2023 "SR is above NO DECREASE. Avoid downscale\n");
2024 action = RS_ACTION_STAY;
2025 } else if (current_tpt > (100 * tbl->expected_tpt[low])) {
2026 IWL_DEBUG_RATE(mvm,
2027 "Current TPT is higher than max expected in low rate. Avoid downscale\n");
2028 action = RS_ACTION_STAY;
2029 } else {
2030 IWL_DEBUG_RATE(mvm, "Decrease rate\n");
2031 }
2032 }
2033
2034 return action;
2035}
2036
2037static bool rs_stbc_allow(struct iwl_mvm *mvm, struct ieee80211_sta *sta,
2038 struct iwl_lq_sta *lq_sta)
2039{
2040
2041
2042
2043 if (!lq_sta->stbc_capable)
2044 return false;
2045
2046 if (!iwl_mvm_bt_coex_is_mimo_allowed(mvm, sta))
2047 return false;
2048
2049 return true;
2050}
2051
2052static void rs_get_adjacent_txp(struct iwl_mvm *mvm, int index,
2053 int *weaker, int *stronger)
2054{
2055 *weaker = index + IWL_MVM_RS_TPC_TX_POWER_STEP;
2056 if (*weaker > TPC_MAX_REDUCTION)
2057 *weaker = TPC_INVALID;
2058
2059 *stronger = index - IWL_MVM_RS_TPC_TX_POWER_STEP;
2060 if (*stronger < 0)
2061 *stronger = TPC_INVALID;
2062}
2063
2064static bool rs_tpc_allowed(struct iwl_mvm *mvm, struct ieee80211_vif *vif,
2065 struct rs_rate *rate, enum nl80211_band band)
2066{
2067 int index = rate->index;
2068 bool cam = (iwlmvm_mod_params.power_scheme == IWL_POWER_SCHEME_CAM);
2069 bool sta_ps_disabled = (vif->type == NL80211_IFTYPE_STATION &&
2070 !vif->bss_conf.ps);
2071
2072 IWL_DEBUG_RATE(mvm, "cam: %d sta_ps_disabled %d\n",
2073 cam, sta_ps_disabled);
2074
2075
2076
2077
2078 if ((cam || sta_ps_disabled) &&
2079 !iwl_mvm_bt_coex_is_tpc_allowed(mvm, band))
2080 return false;
2081
2082 IWL_DEBUG_RATE(mvm, "check rate, table type: %d\n", rate->type);
2083 if (is_legacy(rate))
2084 return index == IWL_RATE_54M_INDEX;
2085 if (is_ht(rate))
2086 return index == IWL_RATE_MCS_7_INDEX;
2087 if (is_vht(rate))
2088 return index == IWL_RATE_MCS_7_INDEX ||
2089 index == IWL_RATE_MCS_8_INDEX ||
2090 index == IWL_RATE_MCS_9_INDEX;
2091
2092 WARN_ON_ONCE(1);
2093 return false;
2094}
2095
2096enum tpc_action {
2097 TPC_ACTION_STAY,
2098 TPC_ACTION_DECREASE,
2099 TPC_ACTION_INCREASE,
2100 TPC_ACTION_NO_RESTIRCTION,
2101};
2102
2103static enum tpc_action rs_get_tpc_action(struct iwl_mvm *mvm,
2104 s32 sr, int weak, int strong,
2105 int current_tpt,
2106 int weak_tpt, int strong_tpt)
2107{
2108
2109 if (current_tpt == IWL_INVALID_VALUE) {
2110 IWL_DEBUG_RATE(mvm, "no current tpt. stay.\n");
2111 return TPC_ACTION_STAY;
2112 }
2113
2114
2115 if (sr <= RS_PERCENT(IWL_MVM_RS_TPC_SR_FORCE_INCREASE) ||
2116 current_tpt == 0) {
2117 IWL_DEBUG_RATE(mvm, "increase txp because of weak SR\n");
2118 return TPC_ACTION_NO_RESTIRCTION;
2119 }
2120
2121
2122 if (sr >= RS_PERCENT(IWL_MVM_RS_TPC_SR_NO_INCREASE) &&
2123 weak != TPC_INVALID) {
2124 if (weak_tpt == IWL_INVALID_VALUE &&
2125 (strong_tpt == IWL_INVALID_VALUE ||
2126 current_tpt >= strong_tpt)) {
2127 IWL_DEBUG_RATE(mvm,
2128 "no weak txp measurement. decrease txp\n");
2129 return TPC_ACTION_DECREASE;
2130 }
2131
2132 if (weak_tpt > current_tpt) {
2133 IWL_DEBUG_RATE(mvm,
2134 "lower txp has better tpt. decrease txp\n");
2135 return TPC_ACTION_DECREASE;
2136 }
2137 }
2138
2139
2140 if (sr < RS_PERCENT(IWL_MVM_RS_TPC_SR_NO_INCREASE) &&
2141 strong != TPC_INVALID) {
2142 if (weak_tpt == IWL_INVALID_VALUE &&
2143 strong_tpt != IWL_INVALID_VALUE &&
2144 current_tpt < strong_tpt) {
2145 IWL_DEBUG_RATE(mvm,
2146 "higher txp has better tpt. increase txp\n");
2147 return TPC_ACTION_INCREASE;
2148 }
2149
2150 if (weak_tpt < current_tpt &&
2151 (strong_tpt == IWL_INVALID_VALUE ||
2152 strong_tpt > current_tpt)) {
2153 IWL_DEBUG_RATE(mvm,
2154 "lower txp has worse tpt. increase txp\n");
2155 return TPC_ACTION_INCREASE;
2156 }
2157 }
2158
2159 IWL_DEBUG_RATE(mvm, "no need to increase or decrease txp - stay\n");
2160 return TPC_ACTION_STAY;
2161}
2162
2163static bool rs_tpc_perform(struct iwl_mvm *mvm,
2164 struct ieee80211_sta *sta,
2165 struct iwl_lq_sta *lq_sta,
2166 struct iwl_scale_tbl_info *tbl)
2167{
2168 struct iwl_mvm_sta *mvm_sta = iwl_mvm_sta_from_mac80211(sta);
2169 struct ieee80211_vif *vif = mvm_sta->vif;
2170 struct ieee80211_chanctx_conf *chanctx_conf;
2171 enum nl80211_band band;
2172 struct iwl_rate_scale_data *window;
2173 struct rs_rate *rate = &tbl->rate;
2174 enum tpc_action action;
2175 s32 sr;
2176 u8 cur = lq_sta->lq.reduced_tpc;
2177 int current_tpt;
2178 int weak, strong;
2179 int weak_tpt = IWL_INVALID_VALUE, strong_tpt = IWL_INVALID_VALUE;
2180
2181#ifdef CONFIG_MAC80211_DEBUGFS
2182 if (lq_sta->pers.dbg_fixed_txp_reduction <= TPC_MAX_REDUCTION) {
2183 IWL_DEBUG_RATE(mvm, "fixed tpc: %d\n",
2184 lq_sta->pers.dbg_fixed_txp_reduction);
2185 lq_sta->lq.reduced_tpc = lq_sta->pers.dbg_fixed_txp_reduction;
2186 return cur != lq_sta->pers.dbg_fixed_txp_reduction;
2187 }
2188#endif
2189
2190 rcu_read_lock();
2191 chanctx_conf = rcu_dereference(vif->chanctx_conf);
2192 if (WARN_ON(!chanctx_conf))
2193 band = NUM_NL80211_BANDS;
2194 else
2195 band = chanctx_conf->def.chan->band;
2196 rcu_read_unlock();
2197
2198 if (!rs_tpc_allowed(mvm, vif, rate, band)) {
2199 IWL_DEBUG_RATE(mvm,
2200 "tpc is not allowed. remove txp restrictions\n");
2201 lq_sta->lq.reduced_tpc = TPC_NO_REDUCTION;
2202 return cur != TPC_NO_REDUCTION;
2203 }
2204
2205 rs_get_adjacent_txp(mvm, cur, &weak, &strong);
2206
2207
2208 window = tbl->tpc_win;
2209 sr = window[cur].success_ratio;
2210 current_tpt = window[cur].average_tpt;
2211 if (weak != TPC_INVALID)
2212 weak_tpt = window[weak].average_tpt;
2213 if (strong != TPC_INVALID)
2214 strong_tpt = window[strong].average_tpt;
2215
2216 IWL_DEBUG_RATE(mvm,
2217 "(TPC: %d): cur_tpt %d SR %d weak %d strong %d weak_tpt %d strong_tpt %d\n",
2218 cur, current_tpt, sr, weak, strong,
2219 weak_tpt, strong_tpt);
2220
2221 action = rs_get_tpc_action(mvm, sr, weak, strong,
2222 current_tpt, weak_tpt, strong_tpt);
2223
2224
2225 if (weak == TPC_INVALID && action == TPC_ACTION_DECREASE) {
2226 IWL_DEBUG_RATE(mvm, "already in lowest txp, stay\n");
2227 action = TPC_ACTION_STAY;
2228 } else if (strong == TPC_INVALID &&
2229 (action == TPC_ACTION_INCREASE ||
2230 action == TPC_ACTION_NO_RESTIRCTION)) {
2231 IWL_DEBUG_RATE(mvm, "already in highest txp, stay\n");
2232 action = TPC_ACTION_STAY;
2233 }
2234
2235 switch (action) {
2236 case TPC_ACTION_DECREASE:
2237 lq_sta->lq.reduced_tpc = weak;
2238 return true;
2239 case TPC_ACTION_INCREASE:
2240 lq_sta->lq.reduced_tpc = strong;
2241 return true;
2242 case TPC_ACTION_NO_RESTIRCTION:
2243 lq_sta->lq.reduced_tpc = TPC_NO_REDUCTION;
2244 return true;
2245 case TPC_ACTION_STAY:
2246
2247 break;
2248 }
2249 return false;
2250}
2251
2252
2253
2254
2255static void rs_rate_scale_perform(struct iwl_mvm *mvm,
2256 struct ieee80211_sta *sta,
2257 struct iwl_lq_sta *lq_sta,
2258 int tid, bool ndp)
2259{
2260 int low = IWL_RATE_INVALID;
2261 int high = IWL_RATE_INVALID;
2262 int index;
2263 struct iwl_rate_scale_data *window = NULL;
2264 int current_tpt = IWL_INVALID_VALUE;
2265 int low_tpt = IWL_INVALID_VALUE;
2266 int high_tpt = IWL_INVALID_VALUE;
2267 u32 fail_count;
2268 enum rs_action scale_action = RS_ACTION_STAY;
2269 u16 rate_mask;
2270 u8 update_lq = 0;
2271 struct iwl_scale_tbl_info *tbl, *tbl1;
2272 u8 active_tbl = 0;
2273 u8 done_search = 0;
2274 u16 high_low;
2275 s32 sr;
2276 u8 prev_agg = lq_sta->is_agg;
2277 struct iwl_mvm_sta *mvmsta = iwl_mvm_sta_from_mac80211(sta);
2278 struct rs_rate *rate;
2279
2280 lq_sta->is_agg = !!mvmsta->agg_tids;
2281
2282
2283
2284
2285
2286
2287 if (!lq_sta->search_better_tbl)
2288 active_tbl = lq_sta->active_tbl;
2289 else
2290 active_tbl = 1 - lq_sta->active_tbl;
2291
2292 tbl = &(lq_sta->lq_info[active_tbl]);
2293 rate = &tbl->rate;
2294
2295 if (prev_agg != lq_sta->is_agg) {
2296 IWL_DEBUG_RATE(mvm,
2297 "Aggregation changed: prev %d current %d. Update expected TPT table\n",
2298 prev_agg, lq_sta->is_agg);
2299 rs_set_expected_tpt_table(lq_sta, tbl);
2300 rs_rate_scale_clear_tbl_windows(mvm, tbl);
2301 }
2302
2303
2304 index = rate->index;
2305
2306
2307 rate_mask = rs_get_supported_rates(lq_sta, rate);
2308
2309 if (!(BIT(index) & rate_mask)) {
2310 IWL_ERR(mvm, "Current Rate is not valid\n");
2311 if (lq_sta->search_better_tbl) {
2312
2313 rate->type = LQ_NONE;
2314 lq_sta->search_better_tbl = 0;
2315 tbl = &(lq_sta->lq_info[lq_sta->active_tbl]);
2316 rs_update_rate_tbl(mvm, sta, lq_sta, tbl);
2317 }
2318 return;
2319 }
2320
2321
2322 if (!tbl->expected_tpt) {
2323 IWL_ERR(mvm, "tbl->expected_tpt is NULL\n");
2324 return;
2325 }
2326
2327
2328 window = &(tbl->win[index]);
2329
2330
2331
2332
2333
2334
2335
2336
2337 fail_count = window->counter - window->success_counter;
2338 if ((fail_count < IWL_MVM_RS_RATE_MIN_FAILURE_TH) &&
2339 (window->success_counter < IWL_MVM_RS_RATE_MIN_SUCCESS_TH)) {
2340 IWL_DEBUG_RATE(mvm,
2341 "%s: Test Window: succ %d total %d\n",
2342 rs_pretty_rate(rate),
2343 window->success_counter, window->counter);
2344
2345
2346 window->average_tpt = IWL_INVALID_VALUE;
2347
2348
2349
2350 rs_stay_in_table(lq_sta, false);
2351
2352 return;
2353 }
2354
2355
2356 if (lq_sta->search_better_tbl) {
2357
2358
2359
2360 if (window->average_tpt > lq_sta->last_tpt) {
2361 IWL_DEBUG_RATE(mvm,
2362 "SWITCHING TO NEW TABLE SR: %d "
2363 "cur-tpt %d old-tpt %d\n",
2364 window->success_ratio,
2365 window->average_tpt,
2366 lq_sta->last_tpt);
2367
2368
2369 lq_sta->active_tbl = active_tbl;
2370 current_tpt = window->average_tpt;
2371
2372 } else {
2373 IWL_DEBUG_RATE(mvm,
2374 "GOING BACK TO THE OLD TABLE: SR %d "
2375 "cur-tpt %d old-tpt %d\n",
2376 window->success_ratio,
2377 window->average_tpt,
2378 lq_sta->last_tpt);
2379
2380
2381 rate->type = LQ_NONE;
2382
2383
2384 active_tbl = lq_sta->active_tbl;
2385 tbl = &(lq_sta->lq_info[active_tbl]);
2386
2387
2388 index = tbl->rate.index;
2389 current_tpt = lq_sta->last_tpt;
2390
2391
2392 update_lq = 1;
2393 }
2394
2395
2396
2397 lq_sta->search_better_tbl = 0;
2398 done_search = 1;
2399 goto lq_update;
2400 }
2401
2402
2403
2404 high_low = rs_get_adjacent_rate(mvm, index, rate_mask, rate->type);
2405 low = high_low & 0xff;
2406 high = (high_low >> 8) & 0xff;
2407
2408
2409
2410 sr = window->success_ratio;
2411
2412
2413 current_tpt = window->average_tpt;
2414 if (low != IWL_RATE_INVALID)
2415 low_tpt = tbl->win[low].average_tpt;
2416 if (high != IWL_RATE_INVALID)
2417 high_tpt = tbl->win[high].average_tpt;
2418
2419 IWL_DEBUG_RATE(mvm,
2420 "%s: cur_tpt %d SR %d low %d high %d low_tpt %d high_tpt %d\n",
2421 rs_pretty_rate(rate), current_tpt, sr,
2422 low, high, low_tpt, high_tpt);
2423
2424 scale_action = rs_get_rate_action(mvm, tbl, sr, low, high,
2425 current_tpt, low_tpt, high_tpt);
2426
2427
2428 if (is_mimo(rate) &&
2429 !iwl_mvm_bt_coex_is_mimo_allowed(mvm, sta)) {
2430 IWL_DEBUG_RATE(mvm,
2431 "BT Coex forbids MIMO. Search for new config\n");
2432 rs_stay_in_table(lq_sta, true);
2433 goto lq_update;
2434 }
2435
2436 switch (scale_action) {
2437 case RS_ACTION_DOWNSCALE:
2438
2439 if (low != IWL_RATE_INVALID) {
2440 update_lq = 1;
2441 index = low;
2442 } else {
2443 IWL_DEBUG_RATE(mvm,
2444 "At the bottom rate. Can't decrease\n");
2445 }
2446
2447 break;
2448 case RS_ACTION_UPSCALE:
2449
2450 if (high != IWL_RATE_INVALID) {
2451 update_lq = 1;
2452 index = high;
2453 } else {
2454 IWL_DEBUG_RATE(mvm,
2455 "At the top rate. Can't increase\n");
2456 }
2457
2458 break;
2459 case RS_ACTION_STAY:
2460
2461 if (lq_sta->rs_state == RS_STATE_STAY_IN_COLUMN)
2462 update_lq = rs_tpc_perform(mvm, sta, lq_sta, tbl);
2463 break;
2464 default:
2465 break;
2466 }
2467
2468lq_update:
2469
2470 if (update_lq) {
2471 tbl->rate.index = index;
2472 if (IWL_MVM_RS_80_20_FAR_RANGE_TWEAK)
2473 rs_tweak_rate_tbl(mvm, sta, lq_sta, tbl, scale_action);
2474 rs_set_amsdu_len(mvm, sta, tbl, scale_action);
2475 rs_update_rate_tbl(mvm, sta, lq_sta, tbl);
2476 }
2477
2478 rs_stay_in_table(lq_sta, false);
2479
2480
2481
2482
2483
2484
2485
2486 if (!update_lq && !done_search &&
2487 lq_sta->rs_state == RS_STATE_SEARCH_CYCLE_STARTED
2488 && window->counter) {
2489 enum rs_column next_column;
2490
2491
2492 lq_sta->last_tpt = current_tpt;
2493
2494 IWL_DEBUG_RATE(mvm,
2495 "Start Search: update_lq %d done_search %d rs_state %d win->counter %d\n",
2496 update_lq, done_search, lq_sta->rs_state,
2497 window->counter);
2498
2499 next_column = rs_get_next_column(mvm, lq_sta, sta, tbl);
2500 if (next_column != RS_COLUMN_INVALID) {
2501 int ret = rs_switch_to_column(mvm, lq_sta, sta,
2502 next_column);
2503 if (!ret)
2504 lq_sta->search_better_tbl = 1;
2505 } else {
2506 IWL_DEBUG_RATE(mvm,
2507 "No more columns to explore in search cycle. Go to RS_STATE_SEARCH_CYCLE_ENDED\n");
2508 lq_sta->rs_state = RS_STATE_SEARCH_CYCLE_ENDED;
2509 }
2510
2511
2512 if (lq_sta->search_better_tbl) {
2513
2514 tbl = &(lq_sta->lq_info[(1 - lq_sta->active_tbl)]);
2515 rs_rate_scale_clear_tbl_windows(mvm, tbl);
2516
2517
2518 index = tbl->rate.index;
2519
2520 rs_dump_rate(mvm, &tbl->rate,
2521 "Switch to SEARCH TABLE:");
2522 rs_update_rate_tbl(mvm, sta, lq_sta, tbl);
2523 } else {
2524 done_search = 1;
2525 }
2526 }
2527
2528 if (!ndp)
2529 rs_tl_turn_on_agg(mvm, mvmsta, tid, lq_sta, sta);
2530
2531 if (done_search && lq_sta->rs_state == RS_STATE_SEARCH_CYCLE_ENDED) {
2532 tbl1 = &(lq_sta->lq_info[lq_sta->active_tbl]);
2533 rs_set_stay_in_table(mvm, is_legacy(&tbl1->rate), lq_sta);
2534 }
2535}
2536
2537struct rs_init_rate_info {
2538 s8 rssi;
2539 u8 rate_idx;
2540};
2541
2542static const struct rs_init_rate_info rs_optimal_rates_24ghz_legacy[] = {
2543 { -60, IWL_RATE_54M_INDEX },
2544 { -64, IWL_RATE_48M_INDEX },
2545 { -68, IWL_RATE_36M_INDEX },
2546 { -80, IWL_RATE_24M_INDEX },
2547 { -84, IWL_RATE_18M_INDEX },
2548 { -85, IWL_RATE_12M_INDEX },
2549 { -86, IWL_RATE_11M_INDEX },
2550 { -88, IWL_RATE_5M_INDEX },
2551 { -90, IWL_RATE_2M_INDEX },
2552 { S8_MIN, IWL_RATE_1M_INDEX },
2553};
2554
2555static const struct rs_init_rate_info rs_optimal_rates_5ghz_legacy[] = {
2556 { -60, IWL_RATE_54M_INDEX },
2557 { -64, IWL_RATE_48M_INDEX },
2558 { -72, IWL_RATE_36M_INDEX },
2559 { -80, IWL_RATE_24M_INDEX },
2560 { -84, IWL_RATE_18M_INDEX },
2561 { -85, IWL_RATE_12M_INDEX },
2562 { -87, IWL_RATE_9M_INDEX },
2563 { S8_MIN, IWL_RATE_6M_INDEX },
2564};
2565
2566static const struct rs_init_rate_info rs_optimal_rates_ht[] = {
2567 { -60, IWL_RATE_MCS_7_INDEX },
2568 { -64, IWL_RATE_MCS_6_INDEX },
2569 { -68, IWL_RATE_MCS_5_INDEX },
2570 { -72, IWL_RATE_MCS_4_INDEX },
2571 { -80, IWL_RATE_MCS_3_INDEX },
2572 { -84, IWL_RATE_MCS_2_INDEX },
2573 { -85, IWL_RATE_MCS_1_INDEX },
2574 { S8_MIN, IWL_RATE_MCS_0_INDEX},
2575};
2576
2577
2578
2579
2580static const struct rs_init_rate_info rs_optimal_rates_vht_20mhz[] = {
2581 { -60, IWL_RATE_MCS_8_INDEX },
2582 { -64, IWL_RATE_MCS_7_INDEX },
2583 { -68, IWL_RATE_MCS_6_INDEX },
2584 { -72, IWL_RATE_MCS_5_INDEX },
2585 { -80, IWL_RATE_MCS_4_INDEX },
2586 { -84, IWL_RATE_MCS_3_INDEX },
2587 { -85, IWL_RATE_MCS_2_INDEX },
2588 { -87, IWL_RATE_MCS_1_INDEX },
2589 { S8_MIN, IWL_RATE_MCS_0_INDEX},
2590};
2591
2592static const struct rs_init_rate_info rs_optimal_rates_vht[] = {
2593 { -60, IWL_RATE_MCS_9_INDEX },
2594 { -64, IWL_RATE_MCS_8_INDEX },
2595 { -68, IWL_RATE_MCS_7_INDEX },
2596 { -72, IWL_RATE_MCS_6_INDEX },
2597 { -80, IWL_RATE_MCS_5_INDEX },
2598 { -84, IWL_RATE_MCS_4_INDEX },
2599 { -85, IWL_RATE_MCS_3_INDEX },
2600 { -87, IWL_RATE_MCS_2_INDEX },
2601 { -88, IWL_RATE_MCS_1_INDEX },
2602 { S8_MIN, IWL_RATE_MCS_0_INDEX },
2603};
2604
2605#define IWL_RS_LOW_RSSI_THRESHOLD (-76)
2606
2607
2608
2609
2610
2611static void rs_init_optimal_rate(struct iwl_mvm *mvm,
2612 struct ieee80211_sta *sta,
2613 struct iwl_lq_sta *lq_sta)
2614{
2615 struct rs_rate *rate = &lq_sta->optimal_rate;
2616
2617 if (lq_sta->max_mimo2_rate_idx != IWL_RATE_INVALID)
2618 rate->type = lq_sta->is_vht ? LQ_VHT_MIMO2 : LQ_HT_MIMO2;
2619 else if (lq_sta->max_siso_rate_idx != IWL_RATE_INVALID)
2620 rate->type = lq_sta->is_vht ? LQ_VHT_SISO : LQ_HT_SISO;
2621 else if (lq_sta->band == NL80211_BAND_5GHZ)
2622 rate->type = LQ_LEGACY_A;
2623 else
2624 rate->type = LQ_LEGACY_G;
2625
2626 rate->bw = rs_bw_from_sta_bw(sta);
2627 rate->sgi = rs_sgi_allow(mvm, sta, rate, NULL);
2628
2629
2630
2631 if (is_mimo(rate)) {
2632 lq_sta->optimal_rate_mask = lq_sta->active_mimo2_rate;
2633 } else if (is_siso(rate)) {
2634 lq_sta->optimal_rate_mask = lq_sta->active_siso_rate;
2635 } else {
2636 lq_sta->optimal_rate_mask = lq_sta->active_legacy_rate;
2637
2638 if (lq_sta->band == NL80211_BAND_5GHZ) {
2639 lq_sta->optimal_rates = rs_optimal_rates_5ghz_legacy;
2640 lq_sta->optimal_nentries =
2641 ARRAY_SIZE(rs_optimal_rates_5ghz_legacy);
2642 } else {
2643 lq_sta->optimal_rates = rs_optimal_rates_24ghz_legacy;
2644 lq_sta->optimal_nentries =
2645 ARRAY_SIZE(rs_optimal_rates_24ghz_legacy);
2646 }
2647 }
2648
2649 if (is_vht(rate)) {
2650 if (rate->bw == RATE_MCS_CHAN_WIDTH_20) {
2651 lq_sta->optimal_rates = rs_optimal_rates_vht_20mhz;
2652 lq_sta->optimal_nentries =
2653 ARRAY_SIZE(rs_optimal_rates_vht_20mhz);
2654 } else {
2655 lq_sta->optimal_rates = rs_optimal_rates_vht;
2656 lq_sta->optimal_nentries =
2657 ARRAY_SIZE(rs_optimal_rates_vht);
2658 }
2659 } else if (is_ht(rate)) {
2660 lq_sta->optimal_rates = rs_optimal_rates_ht;
2661 lq_sta->optimal_nentries = ARRAY_SIZE(rs_optimal_rates_ht);
2662 }
2663}
2664
2665
2666static struct rs_rate *rs_get_optimal_rate(struct iwl_mvm *mvm,
2667 struct iwl_lq_sta *lq_sta)
2668{
2669 struct rs_rate *rate = &lq_sta->optimal_rate;
2670 int i;
2671
2672 rate->index = find_first_bit(&lq_sta->optimal_rate_mask,
2673 BITS_PER_LONG);
2674
2675 for (i = 0; i < lq_sta->optimal_nentries; i++) {
2676 int rate_idx = lq_sta->optimal_rates[i].rate_idx;
2677
2678 if ((lq_sta->pers.last_rssi >= lq_sta->optimal_rates[i].rssi) &&
2679 (BIT(rate_idx) & lq_sta->optimal_rate_mask)) {
2680 rate->index = rate_idx;
2681 break;
2682 }
2683 }
2684
2685 return rate;
2686}
2687
2688
2689
2690
2691static void rs_get_initial_rate(struct iwl_mvm *mvm,
2692 struct ieee80211_sta *sta,
2693 struct iwl_lq_sta *lq_sta,
2694 enum nl80211_band band,
2695 struct rs_rate *rate)
2696{
2697 int i, nentries;
2698 unsigned long active_rate;
2699 s8 best_rssi = S8_MIN;
2700 u8 best_ant = ANT_NONE;
2701 u8 valid_tx_ant = iwl_mvm_get_valid_tx_ant(mvm);
2702 const struct rs_init_rate_info *initial_rates;
2703
2704 for (i = 0; i < ARRAY_SIZE(lq_sta->pers.chain_signal); i++) {
2705 if (!(lq_sta->pers.chains & BIT(i)))
2706 continue;
2707
2708 if (lq_sta->pers.chain_signal[i] > best_rssi) {
2709 best_rssi = lq_sta->pers.chain_signal[i];
2710 best_ant = BIT(i);
2711 }
2712 }
2713
2714 IWL_DEBUG_RATE(mvm, "Best ANT: %s Best RSSI: %d\n",
2715 rs_pretty_ant(best_ant), best_rssi);
2716
2717 if (best_ant != ANT_A && best_ant != ANT_B)
2718 rate->ant = first_antenna(valid_tx_ant);
2719 else
2720 rate->ant = best_ant;
2721
2722 rate->sgi = false;
2723 rate->ldpc = false;
2724 rate->bw = RATE_MCS_CHAN_WIDTH_20;
2725
2726 rate->index = find_first_bit(&lq_sta->active_legacy_rate,
2727 BITS_PER_LONG);
2728
2729 if (band == NL80211_BAND_5GHZ) {
2730 rate->type = LQ_LEGACY_A;
2731 initial_rates = rs_optimal_rates_5ghz_legacy;
2732 nentries = ARRAY_SIZE(rs_optimal_rates_5ghz_legacy);
2733 } else {
2734 rate->type = LQ_LEGACY_G;
2735 initial_rates = rs_optimal_rates_24ghz_legacy;
2736 nentries = ARRAY_SIZE(rs_optimal_rates_24ghz_legacy);
2737 }
2738
2739 if (!IWL_MVM_RS_RSSI_BASED_INIT_RATE)
2740 goto out;
2741
2742
2743
2744
2745
2746
2747 if (sta->vht_cap.vht_supported &&
2748 best_rssi > IWL_RS_LOW_RSSI_THRESHOLD) {
2749 switch (sta->bandwidth) {
2750 case IEEE80211_STA_RX_BW_160:
2751 case IEEE80211_STA_RX_BW_80:
2752 case IEEE80211_STA_RX_BW_40:
2753 initial_rates = rs_optimal_rates_vht;
2754 nentries = ARRAY_SIZE(rs_optimal_rates_vht);
2755 break;
2756 case IEEE80211_STA_RX_BW_20:
2757 initial_rates = rs_optimal_rates_vht_20mhz;
2758 nentries = ARRAY_SIZE(rs_optimal_rates_vht_20mhz);
2759 break;
2760 default:
2761 IWL_ERR(mvm, "Invalid BW %d\n", sta->bandwidth);
2762 goto out;
2763 }
2764
2765 active_rate = lq_sta->active_siso_rate;
2766 rate->type = LQ_VHT_SISO;
2767 rate->bw = rs_bw_from_sta_bw(sta);
2768 } else if (sta->ht_cap.ht_supported &&
2769 best_rssi > IWL_RS_LOW_RSSI_THRESHOLD) {
2770 initial_rates = rs_optimal_rates_ht;
2771 nentries = ARRAY_SIZE(rs_optimal_rates_ht);
2772 active_rate = lq_sta->active_siso_rate;
2773 rate->type = LQ_HT_SISO;
2774 } else {
2775 active_rate = lq_sta->active_legacy_rate;
2776 }
2777
2778 for (i = 0; i < nentries; i++) {
2779 int rate_idx = initial_rates[i].rate_idx;
2780
2781 if ((best_rssi >= initial_rates[i].rssi) &&
2782 (BIT(rate_idx) & active_rate)) {
2783 rate->index = rate_idx;
2784 break;
2785 }
2786 }
2787
2788out:
2789 rs_dump_rate(mvm, rate, "INITIAL");
2790}
2791
2792
2793void rs_update_last_rssi(struct iwl_mvm *mvm,
2794 struct iwl_lq_sta *lq_sta,
2795 struct ieee80211_rx_status *rx_status)
2796{
2797 int i;
2798
2799 lq_sta->pers.chains = rx_status->chains;
2800 lq_sta->pers.chain_signal[0] = rx_status->chain_signal[0];
2801 lq_sta->pers.chain_signal[1] = rx_status->chain_signal[1];
2802 lq_sta->pers.chain_signal[2] = rx_status->chain_signal[2];
2803 lq_sta->pers.last_rssi = S8_MIN;
2804
2805 for (i = 0; i < ARRAY_SIZE(lq_sta->pers.chain_signal); i++) {
2806 if (!(lq_sta->pers.chains & BIT(i)))
2807 continue;
2808
2809 if (lq_sta->pers.chain_signal[i] > lq_sta->pers.last_rssi)
2810 lq_sta->pers.last_rssi = lq_sta->pers.chain_signal[i];
2811 }
2812}
2813
2814
2815
2816
2817
2818
2819
2820
2821
2822
2823
2824
2825
2826
2827
2828static void rs_initialize_lq(struct iwl_mvm *mvm,
2829 struct ieee80211_sta *sta,
2830 struct iwl_lq_sta *lq_sta,
2831 enum nl80211_band band,
2832 bool init)
2833{
2834 struct iwl_scale_tbl_info *tbl;
2835 struct rs_rate *rate;
2836 u8 active_tbl = 0;
2837
2838 if (!sta || !lq_sta)
2839 return;
2840
2841 if (!lq_sta->search_better_tbl)
2842 active_tbl = lq_sta->active_tbl;
2843 else
2844 active_tbl = 1 - lq_sta->active_tbl;
2845
2846 tbl = &(lq_sta->lq_info[active_tbl]);
2847 rate = &tbl->rate;
2848
2849 rs_get_initial_rate(mvm, sta, lq_sta, band, rate);
2850 rs_init_optimal_rate(mvm, sta, lq_sta);
2851
2852 WARN_ONCE(rate->ant != ANT_A && rate->ant != ANT_B,
2853 "ant: 0x%x, chains 0x%x, fw tx ant: 0x%x, nvm tx ant: 0x%x\n",
2854 rate->ant, lq_sta->pers.chains, mvm->fw->valid_tx_ant,
2855 mvm->nvm_data ? mvm->nvm_data->valid_tx_ant : ANT_INVALID);
2856
2857 tbl->column = rs_get_column_from_rate(rate);
2858
2859 rs_set_expected_tpt_table(lq_sta, tbl);
2860 rs_fill_lq_cmd(mvm, sta, lq_sta, rate);
2861
2862 iwl_mvm_send_lq_cmd(mvm, &lq_sta->lq, init);
2863}
2864
2865static void rs_get_rate(void *mvm_r, struct ieee80211_sta *sta, void *mvm_sta,
2866 struct ieee80211_tx_rate_control *txrc)
2867{
2868 struct sk_buff *skb = txrc->skb;
2869 struct iwl_op_mode *op_mode __maybe_unused =
2870 (struct iwl_op_mode *)mvm_r;
2871 struct iwl_mvm *mvm __maybe_unused = IWL_OP_MODE_GET_MVM(op_mode);
2872 struct ieee80211_tx_info *info = IEEE80211_SKB_CB(skb);
2873 struct iwl_lq_sta *lq_sta = mvm_sta;
2874 struct rs_rate *optimal_rate;
2875 u32 last_ucode_rate;
2876
2877 if (sta && !iwl_mvm_sta_from_mac80211(sta)->vif) {
2878
2879
2880
2881 sta = NULL;
2882 mvm_sta = NULL;
2883 }
2884
2885
2886
2887
2888 if (lq_sta && !lq_sta->pers.drv) {
2889 IWL_DEBUG_RATE(mvm, "Rate scaling not initialized yet.\n");
2890 mvm_sta = NULL;
2891 }
2892
2893
2894 if (rate_control_send_low(sta, mvm_sta, txrc))
2895 return;
2896
2897 iwl_mvm_hwrate_to_tx_rate(lq_sta->last_rate_n_flags,
2898 info->band, &info->control.rates[0]);
2899 info->control.rates[0].count = 1;
2900
2901
2902
2903
2904 if (lq_sta->rs_state != RS_STATE_STAY_IN_COLUMN) {
2905 optimal_rate = rs_get_optimal_rate(mvm, lq_sta);
2906 last_ucode_rate = ucode_rate_from_rs_rate(mvm,
2907 optimal_rate);
2908 iwl_mvm_hwrate_to_tx_rate(last_ucode_rate, info->band,
2909 &txrc->reported_rate);
2910 }
2911}
2912
2913static void *rs_alloc_sta(void *mvm_rate, struct ieee80211_sta *sta,
2914 gfp_t gfp)
2915{
2916 struct iwl_mvm_sta *mvmsta = iwl_mvm_sta_from_mac80211(sta);
2917 struct iwl_op_mode *op_mode = (struct iwl_op_mode *)mvm_rate;
2918 struct iwl_mvm *mvm = IWL_OP_MODE_GET_MVM(op_mode);
2919 struct iwl_lq_sta *lq_sta = &mvmsta->lq_sta;
2920
2921 IWL_DEBUG_RATE(mvm, "create station rate scale window\n");
2922
2923 lq_sta->pers.drv = mvm;
2924#ifdef CONFIG_MAC80211_DEBUGFS
2925 lq_sta->pers.dbg_fixed_rate = 0;
2926 lq_sta->pers.dbg_fixed_txp_reduction = TPC_INVALID;
2927 lq_sta->pers.ss_force = RS_SS_FORCE_NONE;
2928#endif
2929 lq_sta->pers.chains = 0;
2930 memset(lq_sta->pers.chain_signal, 0, sizeof(lq_sta->pers.chain_signal));
2931 lq_sta->pers.last_rssi = S8_MIN;
2932
2933 return &mvmsta->lq_sta;
2934}
2935
2936static int rs_vht_highest_rx_mcs_index(struct ieee80211_sta_vht_cap *vht_cap,
2937 int nss)
2938{
2939 u16 rx_mcs = le16_to_cpu(vht_cap->vht_mcs.rx_mcs_map) &
2940 (0x3 << (2 * (nss - 1)));
2941 rx_mcs >>= (2 * (nss - 1));
2942
2943 if (rx_mcs == IEEE80211_VHT_MCS_SUPPORT_0_7)
2944 return IWL_RATE_MCS_7_INDEX;
2945 else if (rx_mcs == IEEE80211_VHT_MCS_SUPPORT_0_8)
2946 return IWL_RATE_MCS_8_INDEX;
2947 else if (rx_mcs == IEEE80211_VHT_MCS_SUPPORT_0_9)
2948 return IWL_RATE_MCS_9_INDEX;
2949
2950 WARN_ON_ONCE(rx_mcs != IEEE80211_VHT_MCS_NOT_SUPPORTED);
2951 return -1;
2952}
2953
2954static void rs_vht_set_enabled_rates(struct ieee80211_sta *sta,
2955 struct ieee80211_sta_vht_cap *vht_cap,
2956 struct iwl_lq_sta *lq_sta)
2957{
2958 int i;
2959 int highest_mcs = rs_vht_highest_rx_mcs_index(vht_cap, 1);
2960
2961 if (highest_mcs >= IWL_RATE_MCS_0_INDEX) {
2962 for (i = IWL_RATE_MCS_0_INDEX; i <= highest_mcs; i++) {
2963 if (i == IWL_RATE_9M_INDEX)
2964 continue;
2965
2966
2967 if (i == IWL_RATE_MCS_9_INDEX &&
2968 sta->bandwidth == IEEE80211_STA_RX_BW_20)
2969 continue;
2970
2971 lq_sta->active_siso_rate |= BIT(i);
2972 }
2973 }
2974
2975 if (sta->rx_nss < 2)
2976 return;
2977
2978 highest_mcs = rs_vht_highest_rx_mcs_index(vht_cap, 2);
2979 if (highest_mcs >= IWL_RATE_MCS_0_INDEX) {
2980 for (i = IWL_RATE_MCS_0_INDEX; i <= highest_mcs; i++) {
2981 if (i == IWL_RATE_9M_INDEX)
2982 continue;
2983
2984
2985 if (i == IWL_RATE_MCS_9_INDEX &&
2986 sta->bandwidth == IEEE80211_STA_RX_BW_20)
2987 continue;
2988
2989 lq_sta->active_mimo2_rate |= BIT(i);
2990 }
2991 }
2992}
2993
2994static void rs_ht_init(struct iwl_mvm *mvm,
2995 struct ieee80211_sta *sta,
2996 struct iwl_lq_sta *lq_sta,
2997 struct ieee80211_sta_ht_cap *ht_cap)
2998{
2999
3000
3001
3002
3003 lq_sta->active_siso_rate = ht_cap->mcs.rx_mask[0] << 1;
3004 lq_sta->active_siso_rate |= ht_cap->mcs.rx_mask[0] & 0x1;
3005 lq_sta->active_siso_rate &= ~((u16)0x2);
3006 lq_sta->active_siso_rate <<= IWL_FIRST_OFDM_RATE;
3007
3008 lq_sta->active_mimo2_rate = ht_cap->mcs.rx_mask[1] << 1;
3009 lq_sta->active_mimo2_rate |= ht_cap->mcs.rx_mask[1] & 0x1;
3010 lq_sta->active_mimo2_rate &= ~((u16)0x2);
3011 lq_sta->active_mimo2_rate <<= IWL_FIRST_OFDM_RATE;
3012
3013 if (mvm->cfg->ht_params->ldpc &&
3014 (ht_cap->cap & IEEE80211_HT_CAP_LDPC_CODING))
3015 lq_sta->ldpc = true;
3016
3017 if (mvm->cfg->ht_params->stbc &&
3018 (num_of_ant(iwl_mvm_get_valid_tx_ant(mvm)) > 1) &&
3019 (ht_cap->cap & IEEE80211_HT_CAP_RX_STBC))
3020 lq_sta->stbc_capable = true;
3021
3022 lq_sta->is_vht = false;
3023}
3024
3025static void rs_vht_init(struct iwl_mvm *mvm,
3026 struct ieee80211_sta *sta,
3027 struct iwl_lq_sta *lq_sta,
3028 struct ieee80211_sta_vht_cap *vht_cap)
3029{
3030 rs_vht_set_enabled_rates(sta, vht_cap, lq_sta);
3031
3032 if (mvm->cfg->ht_params->ldpc &&
3033 (vht_cap->cap & IEEE80211_VHT_CAP_RXLDPC))
3034 lq_sta->ldpc = true;
3035
3036 if (mvm->cfg->ht_params->stbc &&
3037 (num_of_ant(iwl_mvm_get_valid_tx_ant(mvm)) > 1) &&
3038 (vht_cap->cap & IEEE80211_VHT_CAP_RXSTBC_MASK))
3039 lq_sta->stbc_capable = true;
3040
3041 if (fw_has_capa(&mvm->fw->ucode_capa, IWL_UCODE_TLV_CAPA_BEAMFORMER) &&
3042 (num_of_ant(iwl_mvm_get_valid_tx_ant(mvm)) > 1) &&
3043 (vht_cap->cap & IEEE80211_VHT_CAP_SU_BEAMFORMEE_CAPABLE))
3044 lq_sta->bfer_capable = true;
3045
3046 lq_sta->is_vht = true;
3047}
3048
3049#ifdef CONFIG_IWLWIFI_DEBUGFS
3050static void iwl_mvm_reset_frame_stats(struct iwl_mvm *mvm)
3051{
3052 spin_lock_bh(&mvm->drv_stats_lock);
3053 memset(&mvm->drv_rx_stats, 0, sizeof(mvm->drv_rx_stats));
3054 spin_unlock_bh(&mvm->drv_stats_lock);
3055}
3056
3057void iwl_mvm_update_frame_stats(struct iwl_mvm *mvm, u32 rate, bool agg)
3058{
3059 u8 nss = 0;
3060
3061 spin_lock(&mvm->drv_stats_lock);
3062
3063 if (agg)
3064 mvm->drv_rx_stats.agg_frames++;
3065
3066 mvm->drv_rx_stats.success_frames++;
3067
3068 switch (rate & RATE_MCS_CHAN_WIDTH_MSK) {
3069 case RATE_MCS_CHAN_WIDTH_20:
3070 mvm->drv_rx_stats.bw_20_frames++;
3071 break;
3072 case RATE_MCS_CHAN_WIDTH_40:
3073 mvm->drv_rx_stats.bw_40_frames++;
3074 break;
3075 case RATE_MCS_CHAN_WIDTH_80:
3076 mvm->drv_rx_stats.bw_80_frames++;
3077 break;
3078 case RATE_MCS_CHAN_WIDTH_160:
3079 mvm->drv_rx_stats.bw_160_frames++;
3080 break;
3081 default:
3082 WARN_ONCE(1, "bad BW. rate 0x%x", rate);
3083 }
3084
3085 if (rate & RATE_MCS_HT_MSK) {
3086 mvm->drv_rx_stats.ht_frames++;
3087 nss = ((rate & RATE_HT_MCS_NSS_MSK) >> RATE_HT_MCS_NSS_POS) + 1;
3088 } else if (rate & RATE_MCS_VHT_MSK) {
3089 mvm->drv_rx_stats.vht_frames++;
3090 nss = ((rate & RATE_VHT_MCS_NSS_MSK) >>
3091 RATE_VHT_MCS_NSS_POS) + 1;
3092 } else {
3093 mvm->drv_rx_stats.legacy_frames++;
3094 }
3095
3096 if (nss == 1)
3097 mvm->drv_rx_stats.siso_frames++;
3098 else if (nss == 2)
3099 mvm->drv_rx_stats.mimo2_frames++;
3100
3101 if (rate & RATE_MCS_SGI_MSK)
3102 mvm->drv_rx_stats.sgi_frames++;
3103 else
3104 mvm->drv_rx_stats.ngi_frames++;
3105
3106 mvm->drv_rx_stats.last_rates[mvm->drv_rx_stats.last_frame_idx] = rate;
3107 mvm->drv_rx_stats.last_frame_idx =
3108 (mvm->drv_rx_stats.last_frame_idx + 1) %
3109 ARRAY_SIZE(mvm->drv_rx_stats.last_rates);
3110
3111 spin_unlock(&mvm->drv_stats_lock);
3112}
3113#endif
3114
3115
3116
3117
3118void iwl_mvm_rs_rate_init(struct iwl_mvm *mvm, struct ieee80211_sta *sta,
3119 enum nl80211_band band, bool init)
3120{
3121 int i, j;
3122 struct ieee80211_hw *hw = mvm->hw;
3123 struct ieee80211_sta_ht_cap *ht_cap = &sta->ht_cap;
3124 struct ieee80211_sta_vht_cap *vht_cap = &sta->vht_cap;
3125 struct iwl_mvm_sta *mvmsta = iwl_mvm_sta_from_mac80211(sta);
3126 struct iwl_lq_sta *lq_sta = &mvmsta->lq_sta;
3127 struct ieee80211_supported_band *sband;
3128 unsigned long supp;
3129
3130
3131 memset(lq_sta, 0, offsetof(typeof(*lq_sta), pers));
3132
3133 sband = hw->wiphy->bands[band];
3134
3135 lq_sta->lq.sta_id = mvmsta->sta_id;
3136 mvmsta->tlc_amsdu = false;
3137
3138 for (j = 0; j < LQ_SIZE; j++)
3139 rs_rate_scale_clear_tbl_windows(mvm, &lq_sta->lq_info[j]);
3140
3141 lq_sta->flush_timer = 0;
3142 lq_sta->last_tx = jiffies;
3143
3144 IWL_DEBUG_RATE(mvm,
3145 "LQ: *** rate scale station global init for station %d ***\n",
3146 mvmsta->sta_id);
3147
3148
3149
3150
3151
3152 lq_sta->missed_rate_counter = IWL_MVM_RS_MISSED_RATE_MAX;
3153 lq_sta->band = sband->band;
3154
3155
3156
3157 supp = sta->supp_rates[sband->band];
3158 lq_sta->active_legacy_rate = 0;
3159 for_each_set_bit(i, &supp, BITS_PER_LONG)
3160 lq_sta->active_legacy_rate |= BIT(sband->bitrates[i].hw_value);
3161
3162
3163 if (!vht_cap || !vht_cap->vht_supported)
3164 rs_ht_init(mvm, sta, lq_sta, ht_cap);
3165 else
3166 rs_vht_init(mvm, sta, lq_sta, vht_cap);
3167
3168 lq_sta->max_legacy_rate_idx =
3169 rs_get_max_rate_from_mask(lq_sta->active_legacy_rate);
3170 lq_sta->max_siso_rate_idx =
3171 rs_get_max_rate_from_mask(lq_sta->active_siso_rate);
3172 lq_sta->max_mimo2_rate_idx =
3173 rs_get_max_rate_from_mask(lq_sta->active_mimo2_rate);
3174
3175 IWL_DEBUG_RATE(mvm,
3176 "LEGACY=%lX SISO=%lX MIMO2=%lX VHT=%d LDPC=%d STBC=%d BFER=%d\n",
3177 lq_sta->active_legacy_rate,
3178 lq_sta->active_siso_rate,
3179 lq_sta->active_mimo2_rate,
3180 lq_sta->is_vht, lq_sta->ldpc, lq_sta->stbc_capable,
3181 lq_sta->bfer_capable);
3182 IWL_DEBUG_RATE(mvm, "MAX RATE: LEGACY=%d SISO=%d MIMO2=%d\n",
3183 lq_sta->max_legacy_rate_idx,
3184 lq_sta->max_siso_rate_idx,
3185 lq_sta->max_mimo2_rate_idx);
3186
3187
3188 lq_sta->lq.single_stream_ant_msk =
3189 first_antenna(iwl_mvm_get_valid_tx_ant(mvm));
3190 lq_sta->lq.dual_stream_ant_msk = ANT_AB;
3191
3192
3193 lq_sta->tx_agg_tid_en = IWL_AGG_ALL_TID;
3194 lq_sta->is_agg = 0;
3195#ifdef CONFIG_IWLWIFI_DEBUGFS
3196 iwl_mvm_reset_frame_stats(mvm);
3197#endif
3198 rs_initialize_lq(mvm, sta, lq_sta, band, init);
3199}
3200
3201static void rs_rate_update(void *mvm_r,
3202 struct ieee80211_supported_band *sband,
3203 struct cfg80211_chan_def *chandef,
3204 struct ieee80211_sta *sta, void *priv_sta,
3205 u32 changed)
3206{
3207 u8 tid;
3208 struct iwl_op_mode *op_mode =
3209 (struct iwl_op_mode *)mvm_r;
3210 struct iwl_mvm *mvm = IWL_OP_MODE_GET_MVM(op_mode);
3211
3212 if (!iwl_mvm_sta_from_mac80211(sta)->vif)
3213 return;
3214
3215
3216 for (tid = 0; tid < IWL_MAX_TID_COUNT; tid++)
3217 ieee80211_stop_tx_ba_session(sta, tid);
3218
3219 iwl_mvm_rs_rate_init(mvm, sta, sband->band, false);
3220}
3221
3222#ifdef CONFIG_MAC80211_DEBUGFS
3223static void rs_build_rates_table_from_fixed(struct iwl_mvm *mvm,
3224 struct iwl_lq_cmd *lq_cmd,
3225 enum nl80211_band band,
3226 u32 ucode_rate)
3227{
3228 struct rs_rate rate;
3229 int i;
3230 int num_rates = ARRAY_SIZE(lq_cmd->rs_table);
3231 __le32 ucode_rate_le32 = cpu_to_le32(ucode_rate);
3232 u8 ant = (ucode_rate & RATE_MCS_ANT_ABC_MSK) >> RATE_MCS_ANT_POS;
3233
3234 for (i = 0; i < num_rates; i++)
3235 lq_cmd->rs_table[i] = ucode_rate_le32;
3236
3237 rs_rate_from_ucode_rate(ucode_rate, band, &rate);
3238
3239 if (is_mimo(&rate))
3240 lq_cmd->mimo_delim = num_rates - 1;
3241 else
3242 lq_cmd->mimo_delim = 0;
3243
3244 lq_cmd->reduced_tpc = 0;
3245
3246 if (num_of_ant(ant) == 1)
3247 lq_cmd->single_stream_ant_msk = ant;
3248
3249 if (!mvm->trans->cfg->gen2)
3250 lq_cmd->agg_frame_cnt_limit = LINK_QUAL_AGG_FRAME_LIMIT_DEF;
3251 else
3252 lq_cmd->agg_frame_cnt_limit =
3253 LINK_QUAL_AGG_FRAME_LIMIT_GEN2_DEF;
3254}
3255#endif
3256
3257static void rs_fill_rates_for_column(struct iwl_mvm *mvm,
3258 struct iwl_lq_sta *lq_sta,
3259 struct rs_rate *rate,
3260 __le32 *rs_table, int *rs_table_index,
3261 int num_rates, int num_retries,
3262 u8 valid_tx_ant, bool toggle_ant)
3263{
3264 int i, j;
3265 __le32 ucode_rate;
3266 bool bottom_reached = false;
3267 int prev_rate_idx = rate->index;
3268 int end = LINK_QUAL_MAX_RETRY_NUM;
3269 int index = *rs_table_index;
3270
3271 for (i = 0; i < num_rates && index < end; i++) {
3272 for (j = 0; j < num_retries && index < end; j++, index++) {
3273 ucode_rate = cpu_to_le32(ucode_rate_from_rs_rate(mvm,
3274 rate));
3275 rs_table[index] = ucode_rate;
3276 if (toggle_ant)
3277 rs_toggle_antenna(valid_tx_ant, rate);
3278 }
3279
3280 prev_rate_idx = rate->index;
3281 bottom_reached = rs_get_lower_rate_in_column(lq_sta, rate);
3282 if (bottom_reached && !is_legacy(rate))
3283 break;
3284 }
3285
3286 if (!bottom_reached && !is_legacy(rate))
3287 rate->index = prev_rate_idx;
3288
3289 *rs_table_index = index;
3290}
3291
3292
3293
3294
3295
3296
3297
3298
3299
3300
3301
3302
3303
3304
3305
3306
3307
3308
3309
3310
3311
3312static void rs_build_rates_table(struct iwl_mvm *mvm,
3313 struct ieee80211_sta *sta,
3314 struct iwl_lq_sta *lq_sta,
3315 const struct rs_rate *initial_rate)
3316{
3317 struct rs_rate rate;
3318 int num_rates, num_retries, index = 0;
3319 u8 valid_tx_ant = 0;
3320 struct iwl_lq_cmd *lq_cmd = &lq_sta->lq;
3321 bool toggle_ant = false;
3322 u32 color;
3323
3324 memcpy(&rate, initial_rate, sizeof(rate));
3325
3326 valid_tx_ant = iwl_mvm_get_valid_tx_ant(mvm);
3327
3328
3329 if (!fw_has_api(&mvm->fw->ucode_capa, IWL_UCODE_TLV_API_LQ_SS_PARAMS) &&
3330 rs_stbc_allow(mvm, sta, lq_sta))
3331 rate.stbc = true;
3332
3333 if (is_siso(&rate)) {
3334 num_rates = IWL_MVM_RS_INITIAL_SISO_NUM_RATES;
3335 num_retries = IWL_MVM_RS_HT_VHT_RETRIES_PER_RATE;
3336 } else if (is_mimo(&rate)) {
3337 num_rates = IWL_MVM_RS_INITIAL_MIMO_NUM_RATES;
3338 num_retries = IWL_MVM_RS_HT_VHT_RETRIES_PER_RATE;
3339 } else {
3340 num_rates = IWL_MVM_RS_INITIAL_LEGACY_NUM_RATES;
3341 num_retries = IWL_MVM_RS_INITIAL_LEGACY_RETRIES;
3342 toggle_ant = true;
3343 }
3344
3345 rs_fill_rates_for_column(mvm, lq_sta, &rate, lq_cmd->rs_table, &index,
3346 num_rates, num_retries, valid_tx_ant,
3347 toggle_ant);
3348
3349 rs_get_lower_rate_down_column(lq_sta, &rate);
3350
3351 if (is_siso(&rate)) {
3352 num_rates = IWL_MVM_RS_SECONDARY_SISO_NUM_RATES;
3353 num_retries = IWL_MVM_RS_SECONDARY_SISO_RETRIES;
3354 lq_cmd->mimo_delim = index;
3355 } else if (is_legacy(&rate)) {
3356 num_rates = IWL_MVM_RS_SECONDARY_LEGACY_NUM_RATES;
3357 num_retries = IWL_MVM_RS_SECONDARY_LEGACY_RETRIES;
3358 } else {
3359 WARN_ON_ONCE(1);
3360 }
3361
3362 toggle_ant = true;
3363
3364 rs_fill_rates_for_column(mvm, lq_sta, &rate, lq_cmd->rs_table, &index,
3365 num_rates, num_retries, valid_tx_ant,
3366 toggle_ant);
3367
3368 rs_get_lower_rate_down_column(lq_sta, &rate);
3369
3370 num_rates = IWL_MVM_RS_SECONDARY_LEGACY_NUM_RATES;
3371 num_retries = IWL_MVM_RS_SECONDARY_LEGACY_RETRIES;
3372
3373 rs_fill_rates_for_column(mvm, lq_sta, &rate, lq_cmd->rs_table, &index,
3374 num_rates, num_retries, valid_tx_ant,
3375 toggle_ant);
3376
3377
3378 color = LQ_FLAGS_COLOR_INC(LQ_FLAG_COLOR_GET(lq_cmd->flags));
3379 lq_cmd->flags = LQ_FLAG_COLOR_SET(lq_cmd->flags, color);
3380}
3381
3382struct rs_bfer_active_iter_data {
3383 struct ieee80211_sta *exclude_sta;
3384 struct iwl_mvm_sta *bfer_mvmsta;
3385};
3386
3387static void rs_bfer_active_iter(void *_data,
3388 struct ieee80211_sta *sta)
3389{
3390 struct rs_bfer_active_iter_data *data = _data;
3391 struct iwl_mvm_sta *mvmsta = iwl_mvm_sta_from_mac80211(sta);
3392 struct iwl_lq_cmd *lq_cmd = &mvmsta->lq_sta.lq;
3393 u32 ss_params = le32_to_cpu(lq_cmd->ss_params);
3394
3395 if (sta == data->exclude_sta)
3396 return;
3397
3398
3399 if (ss_params & LQ_SS_BFER_ALLOWED) {
3400 WARN_ON_ONCE(data->bfer_mvmsta != NULL);
3401
3402 data->bfer_mvmsta = mvmsta;
3403 }
3404}
3405
3406static int rs_bfer_priority(struct iwl_mvm_sta *sta)
3407{
3408 int prio = -1;
3409 enum nl80211_iftype viftype = ieee80211_vif_type_p2p(sta->vif);
3410
3411 switch (viftype) {
3412 case NL80211_IFTYPE_AP:
3413 case NL80211_IFTYPE_P2P_GO:
3414 prio = 3;
3415 break;
3416 case NL80211_IFTYPE_P2P_CLIENT:
3417 prio = 2;
3418 break;
3419 case NL80211_IFTYPE_STATION:
3420 prio = 1;
3421 break;
3422 default:
3423 WARN_ONCE(true, "viftype %d sta_id %d", viftype, sta->sta_id);
3424 prio = -1;
3425 }
3426
3427 return prio;
3428}
3429
3430
3431static int rs_bfer_priority_cmp(struct iwl_mvm_sta *sta1,
3432 struct iwl_mvm_sta *sta2)
3433{
3434 int prio1 = rs_bfer_priority(sta1);
3435 int prio2 = rs_bfer_priority(sta2);
3436
3437 if (prio1 > prio2)
3438 return 1;
3439 if (prio1 < prio2)
3440 return -1;
3441 return 0;
3442}
3443
3444static void rs_set_lq_ss_params(struct iwl_mvm *mvm,
3445 struct ieee80211_sta *sta,
3446 struct iwl_lq_sta *lq_sta,
3447 const struct rs_rate *initial_rate)
3448{
3449 struct iwl_lq_cmd *lq_cmd = &lq_sta->lq;
3450 struct iwl_mvm_sta *mvmsta = iwl_mvm_sta_from_mac80211(sta);
3451 struct rs_bfer_active_iter_data data = {
3452 .exclude_sta = sta,
3453 .bfer_mvmsta = NULL,
3454 };
3455 struct iwl_mvm_sta *bfer_mvmsta = NULL;
3456 u32 ss_params = LQ_SS_PARAMS_VALID;
3457
3458 if (!iwl_mvm_bt_coex_is_mimo_allowed(mvm, sta))
3459 goto out;
3460
3461#ifdef CONFIG_MAC80211_DEBUGFS
3462
3463
3464
3465 if (lq_sta->pers.ss_force == RS_SS_FORCE_STBC)
3466 ss_params |= (LQ_SS_STBC_1SS_ALLOWED | LQ_SS_FORCE);
3467 else if (lq_sta->pers.ss_force == RS_SS_FORCE_BFER)
3468 ss_params |= (LQ_SS_BFER_ALLOWED | LQ_SS_FORCE);
3469
3470 if (lq_sta->pers.ss_force != RS_SS_FORCE_NONE) {
3471 IWL_DEBUG_RATE(mvm, "Forcing single stream Tx decision %d\n",
3472 lq_sta->pers.ss_force);
3473 goto out;
3474 }
3475#endif
3476
3477 if (lq_sta->stbc_capable)
3478 ss_params |= LQ_SS_STBC_1SS_ALLOWED;
3479
3480 if (!lq_sta->bfer_capable)
3481 goto out;
3482
3483 ieee80211_iterate_stations_atomic(mvm->hw,
3484 rs_bfer_active_iter,
3485 &data);
3486 bfer_mvmsta = data.bfer_mvmsta;
3487
3488
3489
3490
3491
3492 if (!bfer_mvmsta) {
3493 IWL_DEBUG_RATE(mvm, "No sta with BFER allowed found. Allow\n");
3494
3495 ss_params |= LQ_SS_BFER_ALLOWED;
3496 goto out;
3497 }
3498
3499 IWL_DEBUG_RATE(mvm, "Found existing sta %d with BFER activated\n",
3500 bfer_mvmsta->sta_id);
3501
3502
3503 if (rs_bfer_priority_cmp(mvmsta, bfer_mvmsta) > 0) {
3504 struct iwl_lq_cmd *bfersta_lq_cmd = &bfer_mvmsta->lq_sta.lq;
3505 u32 bfersta_ss_params = le32_to_cpu(bfersta_lq_cmd->ss_params);
3506
3507 bfersta_ss_params &= ~LQ_SS_BFER_ALLOWED;
3508 bfersta_lq_cmd->ss_params = cpu_to_le32(bfersta_ss_params);
3509 iwl_mvm_send_lq_cmd(mvm, bfersta_lq_cmd, false);
3510
3511 ss_params |= LQ_SS_BFER_ALLOWED;
3512 IWL_DEBUG_RATE(mvm,
3513 "Lower priority BFER sta found (%d). Switch BFER\n",
3514 bfer_mvmsta->sta_id);
3515 }
3516out:
3517 lq_cmd->ss_params = cpu_to_le32(ss_params);
3518}
3519
3520static void rs_fill_lq_cmd(struct iwl_mvm *mvm,
3521 struct ieee80211_sta *sta,
3522 struct iwl_lq_sta *lq_sta,
3523 const struct rs_rate *initial_rate)
3524{
3525 struct iwl_lq_cmd *lq_cmd = &lq_sta->lq;
3526 struct iwl_mvm_sta *mvmsta;
3527 struct iwl_mvm_vif *mvmvif;
3528
3529 lq_cmd->agg_disable_start_th = IWL_MVM_RS_AGG_DISABLE_START;
3530 lq_cmd->agg_time_limit =
3531 cpu_to_le16(IWL_MVM_RS_AGG_TIME_LIMIT);
3532
3533#ifdef CONFIG_MAC80211_DEBUGFS
3534 if (lq_sta->pers.dbg_fixed_rate) {
3535 rs_build_rates_table_from_fixed(mvm, lq_cmd,
3536 lq_sta->band,
3537 lq_sta->pers.dbg_fixed_rate);
3538 return;
3539 }
3540#endif
3541 if (WARN_ON_ONCE(!sta || !initial_rate))
3542 return;
3543
3544 rs_build_rates_table(mvm, sta, lq_sta, initial_rate);
3545
3546 if (fw_has_api(&mvm->fw->ucode_capa, IWL_UCODE_TLV_API_LQ_SS_PARAMS))
3547 rs_set_lq_ss_params(mvm, sta, lq_sta, initial_rate);
3548
3549 mvmsta = iwl_mvm_sta_from_mac80211(sta);
3550 mvmvif = iwl_mvm_vif_from_mac80211(mvmsta->vif);
3551
3552 if (num_of_ant(initial_rate->ant) == 1)
3553 lq_cmd->single_stream_ant_msk = initial_rate->ant;
3554
3555 lq_cmd->agg_frame_cnt_limit = mvmsta->max_agg_bufsize;
3556
3557
3558
3559
3560
3561
3562 if (iwl_mvm_vif_low_latency(mvmvif))
3563 lq_cmd->agg_frame_cnt_limit--;
3564
3565 if (mvmsta->vif->p2p)
3566 lq_cmd->flags |= LQ_FLAG_USE_RTS_MSK;
3567
3568 lq_cmd->agg_time_limit =
3569 cpu_to_le16(iwl_mvm_coex_agg_time_limit(mvm, sta));
3570}
3571
3572static void *rs_alloc(struct ieee80211_hw *hw, struct dentry *debugfsdir)
3573{
3574 return hw->priv;
3575}
3576
3577static void rs_free(void *mvm_rate)
3578{
3579 return;
3580}
3581
3582static void rs_free_sta(void *mvm_r, struct ieee80211_sta *sta,
3583 void *mvm_sta)
3584{
3585 struct iwl_op_mode *op_mode __maybe_unused = mvm_r;
3586 struct iwl_mvm *mvm __maybe_unused = IWL_OP_MODE_GET_MVM(op_mode);
3587
3588 IWL_DEBUG_RATE(mvm, "enter\n");
3589 IWL_DEBUG_RATE(mvm, "leave\n");
3590}
3591
3592#ifdef CONFIG_MAC80211_DEBUGFS
3593int rs_pretty_print_rate(char *buf, const u32 rate)
3594{
3595
3596 char *type, *bw;
3597 u8 mcs = 0, nss = 0;
3598 u8 ant = (rate & RATE_MCS_ANT_ABC_MSK) >> RATE_MCS_ANT_POS;
3599
3600 if (!(rate & RATE_MCS_HT_MSK) &&
3601 !(rate & RATE_MCS_VHT_MSK)) {
3602 int index = iwl_hwrate_to_plcp_idx(rate);
3603
3604 return sprintf(buf, "Legacy | ANT: %s Rate: %s Mbps\n",
3605 rs_pretty_ant(ant),
3606 index == IWL_RATE_INVALID ? "BAD" :
3607 iwl_rate_mcs[index].mbps);
3608 }
3609
3610 if (rate & RATE_MCS_VHT_MSK) {
3611 type = "VHT";
3612 mcs = rate & RATE_VHT_MCS_RATE_CODE_MSK;
3613 nss = ((rate & RATE_VHT_MCS_NSS_MSK)
3614 >> RATE_VHT_MCS_NSS_POS) + 1;
3615 } else if (rate & RATE_MCS_HT_MSK) {
3616 type = "HT";
3617 mcs = rate & RATE_HT_MCS_INDEX_MSK;
3618 nss = ((rate & RATE_HT_MCS_NSS_MSK)
3619 >> RATE_HT_MCS_NSS_POS) + 1;
3620 } else {
3621 type = "Unknown";
3622 }
3623
3624 switch (rate & RATE_MCS_CHAN_WIDTH_MSK) {
3625 case RATE_MCS_CHAN_WIDTH_20:
3626 bw = "20Mhz";
3627 break;
3628 case RATE_MCS_CHAN_WIDTH_40:
3629 bw = "40Mhz";
3630 break;
3631 case RATE_MCS_CHAN_WIDTH_80:
3632 bw = "80Mhz";
3633 break;
3634 case RATE_MCS_CHAN_WIDTH_160:
3635 bw = "160Mhz";
3636 break;
3637 default:
3638 bw = "BAD BW";
3639 }
3640
3641 return sprintf(buf, "%s | ANT: %s BW: %s MCS: %d NSS: %d %s%s%s%s\n",
3642 type, rs_pretty_ant(ant), bw, mcs, nss,
3643 (rate & RATE_MCS_SGI_MSK) ? "SGI " : "NGI ",
3644 (rate & RATE_MCS_STBC_MSK) ? "STBC " : "",
3645 (rate & RATE_MCS_LDPC_MSK) ? "LDPC " : "",
3646 (rate & RATE_MCS_BF_MSK) ? "BF " : "");
3647}
3648
3649
3650
3651
3652
3653
3654
3655static void rs_program_fix_rate(struct iwl_mvm *mvm,
3656 struct iwl_lq_sta *lq_sta)
3657{
3658 lq_sta->active_legacy_rate = 0x0FFF;
3659 lq_sta->active_siso_rate = 0x1FD0;
3660 lq_sta->active_mimo2_rate = 0x1FD0;
3661
3662 IWL_DEBUG_RATE(mvm, "sta_id %d rate 0x%X\n",
3663 lq_sta->lq.sta_id, lq_sta->pers.dbg_fixed_rate);
3664
3665 if (lq_sta->pers.dbg_fixed_rate) {
3666 rs_fill_lq_cmd(mvm, NULL, lq_sta, NULL);
3667 iwl_mvm_send_lq_cmd(lq_sta->pers.drv, &lq_sta->lq, false);
3668 }
3669}
3670
3671static ssize_t rs_sta_dbgfs_scale_table_write(struct file *file,
3672 const char __user *user_buf, size_t count, loff_t *ppos)
3673{
3674 struct iwl_lq_sta *lq_sta = file->private_data;
3675 struct iwl_mvm *mvm;
3676 char buf[64];
3677 size_t buf_size;
3678 u32 parsed_rate;
3679
3680 mvm = lq_sta->pers.drv;
3681 memset(buf, 0, sizeof(buf));
3682 buf_size = min(count, sizeof(buf) - 1);
3683 if (copy_from_user(buf, user_buf, buf_size))
3684 return -EFAULT;
3685
3686 if (sscanf(buf, "%x", &parsed_rate) == 1)
3687 lq_sta->pers.dbg_fixed_rate = parsed_rate;
3688 else
3689 lq_sta->pers.dbg_fixed_rate = 0;
3690
3691 rs_program_fix_rate(mvm, lq_sta);
3692
3693 return count;
3694}
3695
3696static ssize_t rs_sta_dbgfs_scale_table_read(struct file *file,
3697 char __user *user_buf, size_t count, loff_t *ppos)
3698{
3699 char *buff;
3700 int desc = 0;
3701 int i = 0;
3702 ssize_t ret;
3703
3704 struct iwl_lq_sta *lq_sta = file->private_data;
3705 struct iwl_mvm_sta *mvmsta =
3706 container_of(lq_sta, struct iwl_mvm_sta, lq_sta);
3707 struct iwl_mvm *mvm;
3708 struct iwl_scale_tbl_info *tbl = &(lq_sta->lq_info[lq_sta->active_tbl]);
3709 struct rs_rate *rate = &tbl->rate;
3710 u32 ss_params;
3711
3712 mvm = lq_sta->pers.drv;
3713 buff = kmalloc(2048, GFP_KERNEL);
3714 if (!buff)
3715 return -ENOMEM;
3716
3717 desc += sprintf(buff+desc, "sta_id %d\n", lq_sta->lq.sta_id);
3718 desc += sprintf(buff+desc, "failed=%d success=%d rate=0%lX\n",
3719 lq_sta->total_failed, lq_sta->total_success,
3720 lq_sta->active_legacy_rate);
3721 desc += sprintf(buff+desc, "fixed rate 0x%X\n",
3722 lq_sta->pers.dbg_fixed_rate);
3723 desc += sprintf(buff+desc, "valid_tx_ant %s%s%s\n",
3724 (iwl_mvm_get_valid_tx_ant(mvm) & ANT_A) ? "ANT_A," : "",
3725 (iwl_mvm_get_valid_tx_ant(mvm) & ANT_B) ? "ANT_B," : "",
3726 (iwl_mvm_get_valid_tx_ant(mvm) & ANT_C) ? "ANT_C" : "");
3727 desc += sprintf(buff+desc, "lq type %s\n",
3728 (is_legacy(rate)) ? "legacy" :
3729 is_vht(rate) ? "VHT" : "HT");
3730 if (!is_legacy(rate)) {
3731 desc += sprintf(buff + desc, " %s",
3732 (is_siso(rate)) ? "SISO" : "MIMO2");
3733 desc += sprintf(buff + desc, " %s",
3734 (is_ht20(rate)) ? "20MHz" :
3735 (is_ht40(rate)) ? "40MHz" :
3736 (is_ht80(rate)) ? "80MHz" :
3737 (is_ht160(rate)) ? "160MHz" : "BAD BW");
3738 desc += sprintf(buff + desc, " %s %s %s %s\n",
3739 (rate->sgi) ? "SGI" : "NGI",
3740 (rate->ldpc) ? "LDPC" : "BCC",
3741 (lq_sta->is_agg) ? "AGG on" : "",
3742 (mvmsta->tlc_amsdu) ? "AMSDU on" : "");
3743 }
3744 desc += sprintf(buff+desc, "last tx rate=0x%X\n",
3745 lq_sta->last_rate_n_flags);
3746 desc += sprintf(buff+desc,
3747 "general: flags=0x%X mimo-d=%d s-ant=0x%x d-ant=0x%x\n",
3748 lq_sta->lq.flags,
3749 lq_sta->lq.mimo_delim,
3750 lq_sta->lq.single_stream_ant_msk,
3751 lq_sta->lq.dual_stream_ant_msk);
3752
3753 desc += sprintf(buff+desc,
3754 "agg: time_limit=%d dist_start_th=%d frame_cnt_limit=%d\n",
3755 le16_to_cpu(lq_sta->lq.agg_time_limit),
3756 lq_sta->lq.agg_disable_start_th,
3757 lq_sta->lq.agg_frame_cnt_limit);
3758
3759 desc += sprintf(buff+desc, "reduced tpc=%d\n", lq_sta->lq.reduced_tpc);
3760 ss_params = le32_to_cpu(lq_sta->lq.ss_params);
3761 desc += sprintf(buff+desc, "single stream params: %s%s%s%s\n",
3762 (ss_params & LQ_SS_PARAMS_VALID) ?
3763 "VALID" : "INVALID",
3764 (ss_params & LQ_SS_BFER_ALLOWED) ?
3765 ", BFER" : "",
3766 (ss_params & LQ_SS_STBC_1SS_ALLOWED) ?
3767 ", STBC" : "",
3768 (ss_params & LQ_SS_FORCE) ?
3769 ", FORCE" : "");
3770 desc += sprintf(buff+desc,
3771 "Start idx [0]=0x%x [1]=0x%x [2]=0x%x [3]=0x%x\n",
3772 lq_sta->lq.initial_rate_index[0],
3773 lq_sta->lq.initial_rate_index[1],
3774 lq_sta->lq.initial_rate_index[2],
3775 lq_sta->lq.initial_rate_index[3]);
3776
3777 for (i = 0; i < LINK_QUAL_MAX_RETRY_NUM; i++) {
3778 u32 r = le32_to_cpu(lq_sta->lq.rs_table[i]);
3779
3780 desc += sprintf(buff+desc, " rate[%d] 0x%X ", i, r);
3781 desc += rs_pretty_print_rate(buff+desc, r);
3782 }
3783
3784 ret = simple_read_from_buffer(user_buf, count, ppos, buff, desc);
3785 kfree(buff);
3786 return ret;
3787}
3788
3789static const struct file_operations rs_sta_dbgfs_scale_table_ops = {
3790 .write = rs_sta_dbgfs_scale_table_write,
3791 .read = rs_sta_dbgfs_scale_table_read,
3792 .open = simple_open,
3793 .llseek = default_llseek,
3794};
3795static ssize_t rs_sta_dbgfs_stats_table_read(struct file *file,
3796 char __user *user_buf, size_t count, loff_t *ppos)
3797{
3798 char *buff;
3799 int desc = 0;
3800 int i, j;
3801 ssize_t ret;
3802 struct iwl_scale_tbl_info *tbl;
3803 struct rs_rate *rate;
3804 struct iwl_lq_sta *lq_sta = file->private_data;
3805
3806 buff = kmalloc(1024, GFP_KERNEL);
3807 if (!buff)
3808 return -ENOMEM;
3809
3810 for (i = 0; i < LQ_SIZE; i++) {
3811 tbl = &(lq_sta->lq_info[i]);
3812 rate = &tbl->rate;
3813 desc += sprintf(buff+desc,
3814 "%s type=%d SGI=%d BW=%s DUP=0\n"
3815 "index=%d\n",
3816 lq_sta->active_tbl == i ? "*" : "x",
3817 rate->type,
3818 rate->sgi,
3819 is_ht20(rate) ? "20MHz" :
3820 is_ht40(rate) ? "40MHz" :
3821 is_ht80(rate) ? "80MHz" :
3822 is_ht160(rate) ? "160MHz" : "ERR",
3823 rate->index);
3824 for (j = 0; j < IWL_RATE_COUNT; j++) {
3825 desc += sprintf(buff+desc,
3826 "counter=%d success=%d %%=%d\n",
3827 tbl->win[j].counter,
3828 tbl->win[j].success_counter,
3829 tbl->win[j].success_ratio);
3830 }
3831 }
3832 ret = simple_read_from_buffer(user_buf, count, ppos, buff, desc);
3833 kfree(buff);
3834 return ret;
3835}
3836
3837static const struct file_operations rs_sta_dbgfs_stats_table_ops = {
3838 .read = rs_sta_dbgfs_stats_table_read,
3839 .open = simple_open,
3840 .llseek = default_llseek,
3841};
3842
3843static ssize_t rs_sta_dbgfs_drv_tx_stats_read(struct file *file,
3844 char __user *user_buf,
3845 size_t count, loff_t *ppos)
3846{
3847 static const char * const column_name[] = {
3848 [RS_COLUMN_LEGACY_ANT_A] = "LEGACY_ANT_A",
3849 [RS_COLUMN_LEGACY_ANT_B] = "LEGACY_ANT_B",
3850 [RS_COLUMN_SISO_ANT_A] = "SISO_ANT_A",
3851 [RS_COLUMN_SISO_ANT_B] = "SISO_ANT_B",
3852 [RS_COLUMN_SISO_ANT_A_SGI] = "SISO_ANT_A_SGI",
3853 [RS_COLUMN_SISO_ANT_B_SGI] = "SISO_ANT_B_SGI",
3854 [RS_COLUMN_MIMO2] = "MIMO2",
3855 [RS_COLUMN_MIMO2_SGI] = "MIMO2_SGI",
3856 };
3857
3858 static const char * const rate_name[] = {
3859 [IWL_RATE_1M_INDEX] = "1M",
3860 [IWL_RATE_2M_INDEX] = "2M",
3861 [IWL_RATE_5M_INDEX] = "5.5M",
3862 [IWL_RATE_11M_INDEX] = "11M",
3863 [IWL_RATE_6M_INDEX] = "6M|MCS0",
3864 [IWL_RATE_9M_INDEX] = "9M",
3865 [IWL_RATE_12M_INDEX] = "12M|MCS1",
3866 [IWL_RATE_18M_INDEX] = "18M|MCS2",
3867 [IWL_RATE_24M_INDEX] = "24M|MCS3",
3868 [IWL_RATE_36M_INDEX] = "36M|MCS4",
3869 [IWL_RATE_48M_INDEX] = "48M|MCS5",
3870 [IWL_RATE_54M_INDEX] = "54M|MCS6",
3871 [IWL_RATE_MCS_7_INDEX] = "MCS7",
3872 [IWL_RATE_MCS_8_INDEX] = "MCS8",
3873 [IWL_RATE_MCS_9_INDEX] = "MCS9",
3874 };
3875
3876 char *buff, *pos, *endpos;
3877 int col, rate;
3878 ssize_t ret;
3879 struct iwl_lq_sta *lq_sta = file->private_data;
3880 struct rs_rate_stats *stats;
3881 static const size_t bufsz = 1024;
3882
3883 buff = kmalloc(bufsz, GFP_KERNEL);
3884 if (!buff)
3885 return -ENOMEM;
3886
3887 pos = buff;
3888 endpos = pos + bufsz;
3889
3890 pos += scnprintf(pos, endpos - pos, "COLUMN,");
3891 for (rate = 0; rate < IWL_RATE_COUNT; rate++)
3892 pos += scnprintf(pos, endpos - pos, "%s,", rate_name[rate]);
3893 pos += scnprintf(pos, endpos - pos, "\n");
3894
3895 for (col = 0; col < RS_COLUMN_COUNT; col++) {
3896 pos += scnprintf(pos, endpos - pos,
3897 "%s,", column_name[col]);
3898
3899 for (rate = 0; rate < IWL_RATE_COUNT; rate++) {
3900 stats = &(lq_sta->pers.tx_stats[col][rate]);
3901 pos += scnprintf(pos, endpos - pos,
3902 "%llu/%llu,",
3903 stats->success,
3904 stats->total);
3905 }
3906 pos += scnprintf(pos, endpos - pos, "\n");
3907 }
3908
3909 ret = simple_read_from_buffer(user_buf, count, ppos, buff, pos - buff);
3910 kfree(buff);
3911 return ret;
3912}
3913
3914static ssize_t rs_sta_dbgfs_drv_tx_stats_write(struct file *file,
3915 const char __user *user_buf,
3916 size_t count, loff_t *ppos)
3917{
3918 struct iwl_lq_sta *lq_sta = file->private_data;
3919 memset(lq_sta->pers.tx_stats, 0, sizeof(lq_sta->pers.tx_stats));
3920
3921 return count;
3922}
3923
3924static const struct file_operations rs_sta_dbgfs_drv_tx_stats_ops = {
3925 .read = rs_sta_dbgfs_drv_tx_stats_read,
3926 .write = rs_sta_dbgfs_drv_tx_stats_write,
3927 .open = simple_open,
3928 .llseek = default_llseek,
3929};
3930
3931static ssize_t iwl_dbgfs_ss_force_read(struct file *file,
3932 char __user *user_buf,
3933 size_t count, loff_t *ppos)
3934{
3935 struct iwl_lq_sta *lq_sta = file->private_data;
3936 char buf[12];
3937 int bufsz = sizeof(buf);
3938 int pos = 0;
3939 static const char * const ss_force_name[] = {
3940 [RS_SS_FORCE_NONE] = "none",
3941 [RS_SS_FORCE_STBC] = "stbc",
3942 [RS_SS_FORCE_BFER] = "bfer",
3943 [RS_SS_FORCE_SISO] = "siso",
3944 };
3945
3946 pos += scnprintf(buf+pos, bufsz-pos, "%s\n",
3947 ss_force_name[lq_sta->pers.ss_force]);
3948 return simple_read_from_buffer(user_buf, count, ppos, buf, pos);
3949}
3950
3951static ssize_t iwl_dbgfs_ss_force_write(struct iwl_lq_sta *lq_sta, char *buf,
3952 size_t count, loff_t *ppos)
3953{
3954 struct iwl_mvm *mvm = lq_sta->pers.drv;
3955 int ret = 0;
3956
3957 if (!strncmp("none", buf, 4)) {
3958 lq_sta->pers.ss_force = RS_SS_FORCE_NONE;
3959 } else if (!strncmp("siso", buf, 4)) {
3960 lq_sta->pers.ss_force = RS_SS_FORCE_SISO;
3961 } else if (!strncmp("stbc", buf, 4)) {
3962 if (lq_sta->stbc_capable) {
3963 lq_sta->pers.ss_force = RS_SS_FORCE_STBC;
3964 } else {
3965 IWL_ERR(mvm,
3966 "can't force STBC. peer doesn't support\n");
3967 ret = -EINVAL;
3968 }
3969 } else if (!strncmp("bfer", buf, 4)) {
3970 if (lq_sta->bfer_capable) {
3971 lq_sta->pers.ss_force = RS_SS_FORCE_BFER;
3972 } else {
3973 IWL_ERR(mvm,
3974 "can't force BFER. peer doesn't support\n");
3975 ret = -EINVAL;
3976 }
3977 } else {
3978 IWL_ERR(mvm, "valid values none|siso|stbc|bfer\n");
3979 ret = -EINVAL;
3980 }
3981 return ret ?: count;
3982}
3983
3984#define MVM_DEBUGFS_READ_WRITE_FILE_OPS(name, bufsz) \
3985 _MVM_DEBUGFS_READ_WRITE_FILE_OPS(name, bufsz, struct iwl_lq_sta)
3986#define MVM_DEBUGFS_ADD_FILE_RS(name, parent, mode) do { \
3987 if (!debugfs_create_file(#name, mode, parent, lq_sta, \
3988 &iwl_dbgfs_##name##_ops)) \
3989 goto err; \
3990 } while (0)
3991
3992MVM_DEBUGFS_READ_WRITE_FILE_OPS(ss_force, 32);
3993
3994static void rs_add_debugfs(void *mvm, void *priv_sta, struct dentry *dir)
3995{
3996 struct iwl_lq_sta *lq_sta = priv_sta;
3997 struct iwl_mvm_sta *mvmsta;
3998
3999 mvmsta = container_of(lq_sta, struct iwl_mvm_sta, lq_sta);
4000
4001 if (!mvmsta->vif)
4002 return;
4003
4004 debugfs_create_file("rate_scale_table", S_IRUSR | S_IWUSR, dir,
4005 lq_sta, &rs_sta_dbgfs_scale_table_ops);
4006 debugfs_create_file("rate_stats_table", S_IRUSR, dir,
4007 lq_sta, &rs_sta_dbgfs_stats_table_ops);
4008 debugfs_create_file("drv_tx_stats", S_IRUSR | S_IWUSR, dir,
4009 lq_sta, &rs_sta_dbgfs_drv_tx_stats_ops);
4010 debugfs_create_u8("tx_agg_tid_enable", S_IRUSR | S_IWUSR, dir,
4011 &lq_sta->tx_agg_tid_en);
4012 debugfs_create_u8("reduced_tpc", S_IRUSR | S_IWUSR, dir,
4013 &lq_sta->pers.dbg_fixed_txp_reduction);
4014
4015 MVM_DEBUGFS_ADD_FILE_RS(ss_force, dir, S_IRUSR | S_IWUSR);
4016 return;
4017err:
4018 IWL_ERR((struct iwl_mvm *)mvm, "Can't create debugfs entity\n");
4019}
4020
4021static void rs_remove_debugfs(void *mvm, void *mvm_sta)
4022{
4023}
4024#endif
4025
4026
4027
4028
4029
4030
4031static void rs_rate_init_stub(void *mvm_r,
4032 struct ieee80211_supported_band *sband,
4033 struct cfg80211_chan_def *chandef,
4034 struct ieee80211_sta *sta, void *mvm_sta)
4035{
4036}
4037
4038static const struct rate_control_ops rs_mvm_ops = {
4039 .name = RS_NAME,
4040 .tx_status = rs_mac80211_tx_status,
4041 .get_rate = rs_get_rate,
4042 .rate_init = rs_rate_init_stub,
4043 .alloc = rs_alloc,
4044 .free = rs_free,
4045 .alloc_sta = rs_alloc_sta,
4046 .free_sta = rs_free_sta,
4047 .rate_update = rs_rate_update,
4048#ifdef CONFIG_MAC80211_DEBUGFS
4049 .add_sta_debugfs = rs_add_debugfs,
4050 .remove_sta_debugfs = rs_remove_debugfs,
4051#endif
4052};
4053
4054int iwl_mvm_rate_control_register(void)
4055{
4056 return ieee80211_rate_control_register(&rs_mvm_ops);
4057}
4058
4059void iwl_mvm_rate_control_unregister(void)
4060{
4061 ieee80211_rate_control_unregister(&rs_mvm_ops);
4062}
4063
4064
4065
4066
4067
4068
4069
4070
4071int iwl_mvm_tx_protection(struct iwl_mvm *mvm, struct iwl_mvm_sta *mvmsta,
4072 bool enable)
4073{
4074 struct iwl_lq_cmd *lq = &mvmsta->lq_sta.lq;
4075
4076 lockdep_assert_held(&mvm->mutex);
4077
4078 if (enable) {
4079 if (mvmsta->tx_protection == 0)
4080 lq->flags |= LQ_FLAG_USE_RTS_MSK;
4081 mvmsta->tx_protection++;
4082 } else {
4083 mvmsta->tx_protection--;
4084 if (mvmsta->tx_protection == 0)
4085 lq->flags &= ~LQ_FLAG_USE_RTS_MSK;
4086 }
4087
4088 return iwl_mvm_send_lq_cmd(mvm, lq, false);
4089}
4090