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26#include <linux/kernel.h>
27#include <linux/init.h>
28#include <linux/skbuff.h>
29#include <linux/slab.h>
30#include <net/mac80211.h>
31
32#include <linux/netdevice.h>
33#include <linux/etherdevice.h>
34#include <linux/delay.h>
35
36#include <linux/workqueue.h>
37
38#include "dev.h"
39#include "agn.h"
40
41#define RS_NAME "iwl-agn-rs"
42
43#define NUM_TRY_BEFORE_ANT_TOGGLE 1
44#define IWL_NUMBER_TRY 1
45#define IWL_HT_NUMBER_TRY 3
46
47#define IWL_RATE_MAX_WINDOW 62
48#define IWL_RATE_MIN_FAILURE_TH 6
49#define IWL_RATE_MIN_SUCCESS_TH 8
50
51
52#define IWL_MISSED_RATE_MAX 15
53
54#define IWL_RATE_SCALE_FLUSH_INTVL (3*HZ)
55
56static u8 rs_ht_to_legacy[] = {
57 IWL_RATE_6M_INDEX, IWL_RATE_6M_INDEX,
58 IWL_RATE_6M_INDEX, IWL_RATE_6M_INDEX,
59 IWL_RATE_6M_INDEX,
60 IWL_RATE_6M_INDEX, IWL_RATE_9M_INDEX,
61 IWL_RATE_12M_INDEX, IWL_RATE_18M_INDEX,
62 IWL_RATE_24M_INDEX, IWL_RATE_36M_INDEX,
63 IWL_RATE_48M_INDEX, IWL_RATE_54M_INDEX
64};
65
66static const u8 ant_toggle_lookup[] = {
67 ANT_NONE,
68 ANT_B,
69 ANT_C,
70 ANT_BC,
71 ANT_A,
72 ANT_AB,
73 ANT_AC,
74 ANT_ABC,
75};
76
77#define IWL_DECLARE_RATE_INFO(r, s, ip, in, rp, rn, pp, np) \
78 [IWL_RATE_##r##M_INDEX] = { IWL_RATE_##r##M_PLCP, \
79 IWL_RATE_SISO_##s##M_PLCP, \
80 IWL_RATE_MIMO2_##s##M_PLCP,\
81 IWL_RATE_MIMO3_##s##M_PLCP,\
82 IWL_RATE_##r##M_IEEE, \
83 IWL_RATE_##ip##M_INDEX, \
84 IWL_RATE_##in##M_INDEX, \
85 IWL_RATE_##rp##M_INDEX, \
86 IWL_RATE_##rn##M_INDEX, \
87 IWL_RATE_##pp##M_INDEX, \
88 IWL_RATE_##np##M_INDEX }
89
90
91
92
93
94
95
96
97
98const struct iwl_rate_info iwl_rates[IWL_RATE_COUNT] = {
99 IWL_DECLARE_RATE_INFO(1, INV, INV, 2, INV, 2, INV, 2),
100 IWL_DECLARE_RATE_INFO(2, INV, 1, 5, 1, 5, 1, 5),
101 IWL_DECLARE_RATE_INFO(5, INV, 2, 6, 2, 11, 2, 11),
102 IWL_DECLARE_RATE_INFO(11, INV, 9, 12, 9, 12, 5, 18),
103 IWL_DECLARE_RATE_INFO(6, 6, 5, 9, 5, 11, 5, 11),
104 IWL_DECLARE_RATE_INFO(9, 6, 6, 11, 6, 11, 5, 11),
105 IWL_DECLARE_RATE_INFO(12, 12, 11, 18, 11, 18, 11, 18),
106 IWL_DECLARE_RATE_INFO(18, 18, 12, 24, 12, 24, 11, 24),
107 IWL_DECLARE_RATE_INFO(24, 24, 18, 36, 18, 36, 18, 36),
108 IWL_DECLARE_RATE_INFO(36, 36, 24, 48, 24, 48, 24, 48),
109 IWL_DECLARE_RATE_INFO(48, 48, 36, 54, 36, 54, 36, 54),
110 IWL_DECLARE_RATE_INFO(54, 54, 48, INV, 48, INV, 48, INV),
111 IWL_DECLARE_RATE_INFO(60, 60, 48, INV, 48, INV, 48, INV),
112
113};
114
115static inline u8 rs_extract_rate(u32 rate_n_flags)
116{
117 return (u8)(rate_n_flags & RATE_MCS_RATE_MSK);
118}
119
120static int iwl_hwrate_to_plcp_idx(u32 rate_n_flags)
121{
122 int idx = 0;
123
124
125 if (rate_n_flags & RATE_MCS_HT_MSK) {
126 idx = rs_extract_rate(rate_n_flags);
127
128 if (idx >= IWL_RATE_MIMO3_6M_PLCP)
129 idx = idx - IWL_RATE_MIMO3_6M_PLCP;
130 else if (idx >= IWL_RATE_MIMO2_6M_PLCP)
131 idx = idx - IWL_RATE_MIMO2_6M_PLCP;
132
133 idx += IWL_FIRST_OFDM_RATE;
134
135 if (idx >= IWL_RATE_9M_INDEX)
136 idx += 1;
137 if ((idx >= IWL_FIRST_OFDM_RATE) && (idx <= IWL_LAST_OFDM_RATE))
138 return idx;
139
140
141 } else {
142 for (idx = 0; idx < ARRAY_SIZE(iwl_rates); idx++)
143 if (iwl_rates[idx].plcp ==
144 rs_extract_rate(rate_n_flags))
145 return idx;
146 }
147
148 return -1;
149}
150
151static void rs_rate_scale_perform(struct iwl_priv *priv,
152 struct sk_buff *skb,
153 struct ieee80211_sta *sta,
154 struct iwl_lq_sta *lq_sta);
155static void rs_fill_link_cmd(struct iwl_priv *priv,
156 struct iwl_lq_sta *lq_sta, u32 rate_n_flags);
157static void rs_stay_in_table(struct iwl_lq_sta *lq_sta, bool force_search);
158
159
160#ifdef CONFIG_MAC80211_DEBUGFS
161static void rs_dbgfs_set_mcs(struct iwl_lq_sta *lq_sta,
162 u32 *rate_n_flags, int index);
163#else
164static void rs_dbgfs_set_mcs(struct iwl_lq_sta *lq_sta,
165 u32 *rate_n_flags, int index)
166{}
167#endif
168
169
170
171
172
173
174
175
176
177
178
179
180static s32 expected_tpt_legacy[IWL_RATE_COUNT] = {
181 7, 13, 35, 58, 40, 57, 72, 98, 121, 154, 177, 186, 0
182};
183
184static s32 expected_tpt_siso20MHz[4][IWL_RATE_COUNT] = {
185 {0, 0, 0, 0, 42, 0, 76, 102, 124, 159, 183, 193, 202},
186 {0, 0, 0, 0, 46, 0, 82, 110, 132, 168, 192, 202, 210},
187 {0, 0, 0, 0, 47, 0, 91, 133, 171, 242, 305, 334, 362},
188 {0, 0, 0, 0, 52, 0, 101, 145, 187, 264, 330, 361, 390},
189};
190
191static s32 expected_tpt_siso40MHz[4][IWL_RATE_COUNT] = {
192 {0, 0, 0, 0, 77, 0, 127, 160, 184, 220, 242, 250, 257},
193 {0, 0, 0, 0, 83, 0, 135, 169, 193, 229, 250, 257, 264},
194 {0, 0, 0, 0, 94, 0, 177, 249, 313, 423, 512, 550, 586},
195 {0, 0, 0, 0, 104, 0, 193, 270, 338, 454, 545, 584, 620},
196};
197
198static s32 expected_tpt_mimo2_20MHz[4][IWL_RATE_COUNT] = {
199 {0, 0, 0, 0, 74, 0, 123, 155, 179, 214, 236, 244, 251},
200 {0, 0, 0, 0, 81, 0, 131, 164, 188, 223, 243, 251, 257},
201 {0, 0, 0, 0, 89, 0, 167, 235, 296, 402, 488, 526, 560},
202 {0, 0, 0, 0, 97, 0, 182, 255, 320, 431, 520, 558, 593},
203};
204
205static s32 expected_tpt_mimo2_40MHz[4][IWL_RATE_COUNT] = {
206 {0, 0, 0, 0, 123, 0, 182, 214, 235, 264, 279, 285, 289},
207 {0, 0, 0, 0, 131, 0, 191, 222, 242, 270, 284, 289, 293},
208 {0, 0, 0, 0, 171, 0, 305, 410, 496, 634, 731, 771, 805},
209 {0, 0, 0, 0, 186, 0, 329, 439, 527, 667, 764, 803, 838},
210};
211
212static s32 expected_tpt_mimo3_20MHz[4][IWL_RATE_COUNT] = {
213 {0, 0, 0, 0, 99, 0, 153, 186, 208, 239, 256, 263, 268},
214 {0, 0, 0, 0, 106, 0, 162, 194, 215, 246, 262, 268, 273},
215 {0, 0, 0, 0, 134, 0, 249, 346, 431, 574, 685, 732, 775},
216 {0, 0, 0, 0, 148, 0, 272, 376, 465, 614, 727, 775, 818},
217};
218
219static s32 expected_tpt_mimo3_40MHz[4][IWL_RATE_COUNT] = {
220 {0, 0, 0, 0, 152, 0, 211, 239, 255, 279, 290, 294, 297},
221 {0, 0, 0, 0, 160, 0, 219, 245, 261, 284, 294, 297, 300},
222 {0, 0, 0, 0, 254, 0, 443, 584, 695, 868, 984, 1030, 1070},
223 {0, 0, 0, 0, 277, 0, 478, 624, 737, 911, 1026, 1070, 1109},
224};
225
226
227static const struct iwl_rate_mcs_info iwl_rate_mcs[IWL_RATE_COUNT] = {
228 { "1", "BPSK DSSS"},
229 { "2", "QPSK DSSS"},
230 {"5.5", "BPSK CCK"},
231 { "11", "QPSK CCK"},
232 { "6", "BPSK 1/2"},
233 { "9", "BPSK 1/2"},
234 { "12", "QPSK 1/2"},
235 { "18", "QPSK 3/4"},
236 { "24", "16QAM 1/2"},
237 { "36", "16QAM 3/4"},
238 { "48", "64QAM 2/3"},
239 { "54", "64QAM 3/4"},
240 { "60", "64QAM 5/6"},
241};
242
243#define MCS_INDEX_PER_STREAM (8)
244
245static void rs_rate_scale_clear_window(struct iwl_rate_scale_data *window)
246{
247 window->data = 0;
248 window->success_counter = 0;
249 window->success_ratio = IWL_INVALID_VALUE;
250 window->counter = 0;
251 window->average_tpt = IWL_INVALID_VALUE;
252 window->stamp = 0;
253}
254
255static inline u8 rs_is_valid_ant(u8 valid_antenna, u8 ant_type)
256{
257 return (ant_type & valid_antenna) == ant_type;
258}
259
260
261
262
263
264static void rs_tl_rm_old_stats(struct iwl_traffic_load *tl, u32 curr_time)
265{
266
267 u32 oldest_time = curr_time - TID_MAX_TIME_DIFF;
268
269 while (tl->queue_count &&
270 (tl->time_stamp < oldest_time)) {
271 tl->total -= tl->packet_count[tl->head];
272 tl->packet_count[tl->head] = 0;
273 tl->time_stamp += TID_QUEUE_CELL_SPACING;
274 tl->queue_count--;
275 tl->head++;
276 if (tl->head >= TID_QUEUE_MAX_SIZE)
277 tl->head = 0;
278 }
279}
280
281
282
283
284
285static u8 rs_tl_add_packet(struct iwl_lq_sta *lq_data,
286 struct ieee80211_hdr *hdr)
287{
288 u32 curr_time = jiffies_to_msecs(jiffies);
289 u32 time_diff;
290 s32 index;
291 struct iwl_traffic_load *tl = NULL;
292 u8 tid;
293
294 if (ieee80211_is_data_qos(hdr->frame_control)) {
295 u8 *qc = ieee80211_get_qos_ctl(hdr);
296 tid = qc[0] & 0xf;
297 } else
298 return IWL_MAX_TID_COUNT;
299
300 if (unlikely(tid >= IWL_MAX_TID_COUNT))
301 return IWL_MAX_TID_COUNT;
302
303 tl = &lq_data->load[tid];
304
305 curr_time -= curr_time % TID_ROUND_VALUE;
306
307
308 if (!(tl->queue_count)) {
309 tl->total = 1;
310 tl->time_stamp = curr_time;
311 tl->queue_count = 1;
312 tl->head = 0;
313 tl->packet_count[0] = 1;
314 return IWL_MAX_TID_COUNT;
315 }
316
317 time_diff = TIME_WRAP_AROUND(tl->time_stamp, curr_time);
318 index = time_diff / TID_QUEUE_CELL_SPACING;
319
320
321
322 if (index >= TID_QUEUE_MAX_SIZE)
323 rs_tl_rm_old_stats(tl, curr_time);
324
325 index = (tl->head + index) % TID_QUEUE_MAX_SIZE;
326 tl->packet_count[index] = tl->packet_count[index] + 1;
327 tl->total = tl->total + 1;
328
329 if ((index + 1) > tl->queue_count)
330 tl->queue_count = index + 1;
331
332 return tid;
333}
334
335#ifdef CONFIG_MAC80211_DEBUGFS
336
337
338
339
340
341
342static void rs_program_fix_rate(struct iwl_priv *priv,
343 struct iwl_lq_sta *lq_sta)
344{
345 struct iwl_station_priv *sta_priv =
346 container_of(lq_sta, struct iwl_station_priv, lq_sta);
347 struct iwl_rxon_context *ctx = sta_priv->ctx;
348
349 lq_sta->active_legacy_rate = 0x0FFF;
350 lq_sta->active_siso_rate = 0x1FD0;
351 lq_sta->active_mimo2_rate = 0x1FD0;
352 lq_sta->active_mimo3_rate = 0x1FD0;
353
354#ifdef CONFIG_IWLWIFI_DEVICE_TESTMODE
355
356 if (priv->tm_fixed_rate)
357 lq_sta->dbg_fixed_rate = priv->tm_fixed_rate;
358#endif
359
360 IWL_DEBUG_RATE(priv, "sta_id %d rate 0x%X\n",
361 lq_sta->lq.sta_id, lq_sta->dbg_fixed_rate);
362
363 if (lq_sta->dbg_fixed_rate) {
364 rs_fill_link_cmd(NULL, lq_sta, lq_sta->dbg_fixed_rate);
365 iwl_send_lq_cmd(lq_sta->drv, ctx, &lq_sta->lq, CMD_ASYNC,
366 false);
367 }
368}
369#endif
370
371
372
373
374static u32 rs_tl_get_load(struct iwl_lq_sta *lq_data, u8 tid)
375{
376 u32 curr_time = jiffies_to_msecs(jiffies);
377 u32 time_diff;
378 s32 index;
379 struct iwl_traffic_load *tl = NULL;
380
381 if (tid >= IWL_MAX_TID_COUNT)
382 return 0;
383
384 tl = &(lq_data->load[tid]);
385
386 curr_time -= curr_time % TID_ROUND_VALUE;
387
388 if (!(tl->queue_count))
389 return 0;
390
391 time_diff = TIME_WRAP_AROUND(tl->time_stamp, curr_time);
392 index = time_diff / TID_QUEUE_CELL_SPACING;
393
394
395
396 if (index >= TID_QUEUE_MAX_SIZE)
397 rs_tl_rm_old_stats(tl, curr_time);
398
399 return tl->total;
400}
401
402static int rs_tl_turn_on_agg_for_tid(struct iwl_priv *priv,
403 struct iwl_lq_sta *lq_data, u8 tid,
404 struct ieee80211_sta *sta)
405{
406 int ret = -EAGAIN;
407 u32 load;
408
409
410
411
412
413 if (priv->bt_traffic_load >= IWL_BT_COEX_TRAFFIC_LOAD_HIGH) {
414 IWL_DEBUG_COEX(priv,
415 "BT traffic (%d), no aggregation allowed\n",
416 priv->bt_traffic_load);
417 return ret;
418 }
419
420 load = rs_tl_get_load(lq_data, tid);
421
422 if ((iwlwifi_mod_params.auto_agg) || (load > IWL_AGG_LOAD_THRESHOLD)) {
423 IWL_DEBUG_HT(priv, "Starting Tx agg: STA: %pM tid: %d\n",
424 sta->addr, tid);
425 ret = ieee80211_start_tx_ba_session(sta, tid, 5000);
426 if (ret == -EAGAIN) {
427
428
429
430
431
432 IWL_ERR(priv, "Fail start Tx agg on tid: %d\n",
433 tid);
434 ieee80211_stop_tx_ba_session(sta, tid);
435 }
436 } else {
437 IWL_DEBUG_HT(priv, "Aggregation not enabled for tid %d "
438 "because load = %u\n", tid, load);
439 }
440 return ret;
441}
442
443static void rs_tl_turn_on_agg(struct iwl_priv *priv, u8 tid,
444 struct iwl_lq_sta *lq_data,
445 struct ieee80211_sta *sta)
446{
447 if (tid < IWL_MAX_TID_COUNT)
448 rs_tl_turn_on_agg_for_tid(priv, lq_data, tid, sta);
449 else
450 IWL_ERR(priv, "tid exceeds max TID count: %d/%d\n",
451 tid, IWL_MAX_TID_COUNT);
452}
453
454static inline int get_num_of_ant_from_rate(u32 rate_n_flags)
455{
456 return !!(rate_n_flags & RATE_MCS_ANT_A_MSK) +
457 !!(rate_n_flags & RATE_MCS_ANT_B_MSK) +
458 !!(rate_n_flags & RATE_MCS_ANT_C_MSK);
459}
460
461
462
463
464
465static s32 get_expected_tpt(struct iwl_scale_tbl_info *tbl, int rs_index)
466{
467 if (tbl->expected_tpt)
468 return tbl->expected_tpt[rs_index];
469 return 0;
470}
471
472
473
474
475
476
477
478
479static int rs_collect_tx_data(struct iwl_scale_tbl_info *tbl,
480 int scale_index, int attempts, int successes)
481{
482 struct iwl_rate_scale_data *window = NULL;
483 static const u64 mask = (((u64)1) << (IWL_RATE_MAX_WINDOW - 1));
484 s32 fail_count, tpt;
485
486 if (scale_index < 0 || scale_index >= IWL_RATE_COUNT)
487 return -EINVAL;
488
489
490 window = &(tbl->win[scale_index]);
491
492
493 tpt = get_expected_tpt(tbl, scale_index);
494
495
496
497
498
499
500
501
502
503 while (attempts > 0) {
504 if (window->counter >= IWL_RATE_MAX_WINDOW) {
505
506
507 window->counter = IWL_RATE_MAX_WINDOW - 1;
508
509 if (window->data & mask) {
510 window->data &= ~mask;
511 window->success_counter--;
512 }
513 }
514
515
516 window->counter++;
517
518
519 window->data <<= 1;
520
521
522 if (successes > 0) {
523 window->success_counter++;
524 window->data |= 0x1;
525 successes--;
526 }
527
528 attempts--;
529 }
530
531
532 if (window->counter > 0)
533 window->success_ratio = 128 * (100 * window->success_counter)
534 / window->counter;
535 else
536 window->success_ratio = IWL_INVALID_VALUE;
537
538 fail_count = window->counter - window->success_counter;
539
540
541 if ((fail_count >= IWL_RATE_MIN_FAILURE_TH) ||
542 (window->success_counter >= IWL_RATE_MIN_SUCCESS_TH))
543 window->average_tpt = (window->success_ratio * tpt + 64) / 128;
544 else
545 window->average_tpt = IWL_INVALID_VALUE;
546
547
548 window->stamp = jiffies;
549
550 return 0;
551}
552
553
554
555
556
557static u32 rate_n_flags_from_tbl(struct iwl_priv *priv,
558 struct iwl_scale_tbl_info *tbl,
559 int index, u8 use_green)
560{
561 u32 rate_n_flags = 0;
562
563 if (is_legacy(tbl->lq_type)) {
564 rate_n_flags = iwl_rates[index].plcp;
565 if (index >= IWL_FIRST_CCK_RATE && index <= IWL_LAST_CCK_RATE)
566 rate_n_flags |= RATE_MCS_CCK_MSK;
567
568 } else if (is_Ht(tbl->lq_type)) {
569 if (index > IWL_LAST_OFDM_RATE) {
570 IWL_ERR(priv, "Invalid HT rate index %d\n", index);
571 index = IWL_LAST_OFDM_RATE;
572 }
573 rate_n_flags = RATE_MCS_HT_MSK;
574
575 if (is_siso(tbl->lq_type))
576 rate_n_flags |= iwl_rates[index].plcp_siso;
577 else if (is_mimo2(tbl->lq_type))
578 rate_n_flags |= iwl_rates[index].plcp_mimo2;
579 else
580 rate_n_flags |= iwl_rates[index].plcp_mimo3;
581 } else {
582 IWL_ERR(priv, "Invalid tbl->lq_type %d\n", tbl->lq_type);
583 }
584
585 rate_n_flags |= ((tbl->ant_type << RATE_MCS_ANT_POS) &
586 RATE_MCS_ANT_ABC_MSK);
587
588 if (is_Ht(tbl->lq_type)) {
589 if (tbl->is_ht40) {
590 if (tbl->is_dup)
591 rate_n_flags |= RATE_MCS_DUP_MSK;
592 else
593 rate_n_flags |= RATE_MCS_HT40_MSK;
594 }
595 if (tbl->is_SGI)
596 rate_n_flags |= RATE_MCS_SGI_MSK;
597
598 if (use_green) {
599 rate_n_flags |= RATE_MCS_GF_MSK;
600 if (is_siso(tbl->lq_type) && tbl->is_SGI) {
601 rate_n_flags &= ~RATE_MCS_SGI_MSK;
602 IWL_ERR(priv, "GF was set with SGI:SISO\n");
603 }
604 }
605 }
606 return rate_n_flags;
607}
608
609
610
611
612
613static int rs_get_tbl_info_from_mcs(const u32 rate_n_flags,
614 enum ieee80211_band band,
615 struct iwl_scale_tbl_info *tbl,
616 int *rate_idx)
617{
618 u32 ant_msk = (rate_n_flags & RATE_MCS_ANT_ABC_MSK);
619 u8 num_of_ant = get_num_of_ant_from_rate(rate_n_flags);
620 u8 mcs;
621
622 memset(tbl, 0, sizeof(struct iwl_scale_tbl_info));
623 *rate_idx = iwl_hwrate_to_plcp_idx(rate_n_flags);
624
625 if (*rate_idx == IWL_RATE_INVALID) {
626 *rate_idx = -1;
627 return -EINVAL;
628 }
629 tbl->is_SGI = 0;
630 tbl->is_ht40 = 0;
631 tbl->is_dup = 0;
632 tbl->ant_type = (ant_msk >> RATE_MCS_ANT_POS);
633 tbl->lq_type = LQ_NONE;
634 tbl->max_search = IWL_MAX_SEARCH;
635
636
637 if (!(rate_n_flags & RATE_MCS_HT_MSK)) {
638 if (num_of_ant == 1) {
639 if (band == IEEE80211_BAND_5GHZ)
640 tbl->lq_type = LQ_A;
641 else
642 tbl->lq_type = LQ_G;
643 }
644
645 } else {
646 if (rate_n_flags & RATE_MCS_SGI_MSK)
647 tbl->is_SGI = 1;
648
649 if ((rate_n_flags & RATE_MCS_HT40_MSK) ||
650 (rate_n_flags & RATE_MCS_DUP_MSK))
651 tbl->is_ht40 = 1;
652
653 if (rate_n_flags & RATE_MCS_DUP_MSK)
654 tbl->is_dup = 1;
655
656 mcs = rs_extract_rate(rate_n_flags);
657
658
659 if (mcs <= IWL_RATE_SISO_60M_PLCP) {
660 if (num_of_ant == 1)
661 tbl->lq_type = LQ_SISO;
662
663 } else if (mcs <= IWL_RATE_MIMO2_60M_PLCP) {
664 if (num_of_ant == 2)
665 tbl->lq_type = LQ_MIMO2;
666
667 } else {
668 if (num_of_ant == 3) {
669 tbl->max_search = IWL_MAX_11N_MIMO3_SEARCH;
670 tbl->lq_type = LQ_MIMO3;
671 }
672 }
673 }
674 return 0;
675}
676
677
678
679static int rs_toggle_antenna(u32 valid_ant, u32 *rate_n_flags,
680 struct iwl_scale_tbl_info *tbl)
681{
682 u8 new_ant_type;
683
684 if (!tbl->ant_type || tbl->ant_type > ANT_ABC)
685 return 0;
686
687 if (!rs_is_valid_ant(valid_ant, tbl->ant_type))
688 return 0;
689
690 new_ant_type = ant_toggle_lookup[tbl->ant_type];
691
692 while ((new_ant_type != tbl->ant_type) &&
693 !rs_is_valid_ant(valid_ant, new_ant_type))
694 new_ant_type = ant_toggle_lookup[new_ant_type];
695
696 if (new_ant_type == tbl->ant_type)
697 return 0;
698
699 tbl->ant_type = new_ant_type;
700 *rate_n_flags &= ~RATE_MCS_ANT_ABC_MSK;
701 *rate_n_flags |= new_ant_type << RATE_MCS_ANT_POS;
702 return 1;
703}
704
705
706
707
708
709static bool rs_use_green(struct ieee80211_sta *sta)
710{
711
712
713
714
715
716
717
718 return false;
719}
720
721
722
723
724
725
726
727
728static u16 rs_get_supported_rates(struct iwl_lq_sta *lq_sta,
729 struct ieee80211_hdr *hdr,
730 enum iwl_table_type rate_type)
731{
732 if (is_legacy(rate_type)) {
733 return lq_sta->active_legacy_rate;
734 } else {
735 if (is_siso(rate_type))
736 return lq_sta->active_siso_rate;
737 else if (is_mimo2(rate_type))
738 return lq_sta->active_mimo2_rate;
739 else
740 return lq_sta->active_mimo3_rate;
741 }
742}
743
744static u16 rs_get_adjacent_rate(struct iwl_priv *priv, u8 index, u16 rate_mask,
745 int rate_type)
746{
747 u8 high = IWL_RATE_INVALID;
748 u8 low = IWL_RATE_INVALID;
749
750
751
752 if (is_a_band(rate_type) || !is_legacy(rate_type)) {
753 int i;
754 u32 mask;
755
756
757 i = index - 1;
758 for (mask = (1 << i); i >= 0; i--, mask >>= 1) {
759 if (rate_mask & mask) {
760 low = i;
761 break;
762 }
763 }
764
765
766 i = index + 1;
767 for (mask = (1 << i); i < IWL_RATE_COUNT; i++, mask <<= 1) {
768 if (rate_mask & mask) {
769 high = i;
770 break;
771 }
772 }
773
774 return (high << 8) | low;
775 }
776
777 low = index;
778 while (low != IWL_RATE_INVALID) {
779 low = iwl_rates[low].prev_rs;
780 if (low == IWL_RATE_INVALID)
781 break;
782 if (rate_mask & (1 << low))
783 break;
784 IWL_DEBUG_RATE(priv, "Skipping masked lower rate: %d\n", low);
785 }
786
787 high = index;
788 while (high != IWL_RATE_INVALID) {
789 high = iwl_rates[high].next_rs;
790 if (high == IWL_RATE_INVALID)
791 break;
792 if (rate_mask & (1 << high))
793 break;
794 IWL_DEBUG_RATE(priv, "Skipping masked higher rate: %d\n", high);
795 }
796
797 return (high << 8) | low;
798}
799
800static u32 rs_get_lower_rate(struct iwl_lq_sta *lq_sta,
801 struct iwl_scale_tbl_info *tbl,
802 u8 scale_index, u8 ht_possible)
803{
804 s32 low;
805 u16 rate_mask;
806 u16 high_low;
807 u8 switch_to_legacy = 0;
808 u8 is_green = lq_sta->is_green;
809 struct iwl_priv *priv = lq_sta->drv;
810
811
812
813
814 if (!is_legacy(tbl->lq_type) && (!ht_possible || !scale_index)) {
815 switch_to_legacy = 1;
816 scale_index = rs_ht_to_legacy[scale_index];
817 if (lq_sta->band == IEEE80211_BAND_5GHZ)
818 tbl->lq_type = LQ_A;
819 else
820 tbl->lq_type = LQ_G;
821
822 if (num_of_ant(tbl->ant_type) > 1)
823 tbl->ant_type =
824 first_antenna(priv->nvm_data->valid_tx_ant);
825
826 tbl->is_ht40 = 0;
827 tbl->is_SGI = 0;
828 tbl->max_search = IWL_MAX_SEARCH;
829 }
830
831 rate_mask = rs_get_supported_rates(lq_sta, NULL, tbl->lq_type);
832
833
834 if (is_legacy(tbl->lq_type)) {
835
836 if (lq_sta->band == IEEE80211_BAND_5GHZ)
837 rate_mask = (u16)(rate_mask &
838 (lq_sta->supp_rates << IWL_FIRST_OFDM_RATE));
839 else
840 rate_mask = (u16)(rate_mask & lq_sta->supp_rates);
841 }
842
843
844 if (switch_to_legacy && (rate_mask & (1 << scale_index))) {
845 low = scale_index;
846 goto out;
847 }
848
849 high_low = rs_get_adjacent_rate(lq_sta->drv, scale_index, rate_mask,
850 tbl->lq_type);
851 low = high_low & 0xff;
852
853 if (low == IWL_RATE_INVALID)
854 low = scale_index;
855
856out:
857 return rate_n_flags_from_tbl(lq_sta->drv, tbl, low, is_green);
858}
859
860
861
862
863static bool table_type_matches(struct iwl_scale_tbl_info *a,
864 struct iwl_scale_tbl_info *b)
865{
866 return (a->lq_type == b->lq_type) && (a->ant_type == b->ant_type) &&
867 (a->is_SGI == b->is_SGI);
868}
869
870static void rs_bt_update_lq(struct iwl_priv *priv, struct iwl_rxon_context *ctx,
871 struct iwl_lq_sta *lq_sta)
872{
873 struct iwl_scale_tbl_info *tbl;
874 bool full_concurrent = priv->bt_full_concurrent;
875
876 if (priv->bt_ant_couple_ok) {
877
878
879
880
881 if (priv->bt_ci_compliance && priv->bt_ant_couple_ok)
882 full_concurrent = true;
883 else
884 full_concurrent = false;
885 }
886 if ((priv->bt_traffic_load != priv->last_bt_traffic_load) ||
887 (priv->bt_full_concurrent != full_concurrent)) {
888 priv->bt_full_concurrent = full_concurrent;
889 priv->last_bt_traffic_load = priv->bt_traffic_load;
890
891
892 tbl = &(lq_sta->lq_info[lq_sta->active_tbl]);
893 rs_fill_link_cmd(priv, lq_sta, tbl->current_rate);
894 iwl_send_lq_cmd(priv, ctx, &lq_sta->lq, CMD_ASYNC, false);
895
896 queue_work(priv->workqueue, &priv->bt_full_concurrency);
897 }
898}
899
900
901
902
903static void rs_tx_status(void *priv_r, struct ieee80211_supported_band *sband,
904 struct ieee80211_sta *sta, void *priv_sta,
905 struct sk_buff *skb)
906{
907 int legacy_success;
908 int retries;
909 int rs_index, mac_index, i;
910 struct iwl_lq_sta *lq_sta = priv_sta;
911 struct iwl_link_quality_cmd *table;
912 struct ieee80211_hdr *hdr = (struct ieee80211_hdr *)skb->data;
913 struct iwl_op_mode *op_mode = (struct iwl_op_mode *)priv_r;
914 struct iwl_priv *priv = IWL_OP_MODE_GET_DVM(op_mode);
915 struct ieee80211_tx_info *info = IEEE80211_SKB_CB(skb);
916 enum mac80211_rate_control_flags mac_flags;
917 u32 tx_rate;
918 struct iwl_scale_tbl_info tbl_type;
919 struct iwl_scale_tbl_info *curr_tbl, *other_tbl, *tmp_tbl;
920 struct iwl_station_priv *sta_priv = (void *)sta->drv_priv;
921 struct iwl_rxon_context *ctx = sta_priv->ctx;
922
923 IWL_DEBUG_RATE_LIMIT(priv, "get frame ack response, update rate scale window\n");
924
925
926 if (!lq_sta) {
927 IWL_DEBUG_RATE(priv, "Station rate scaling not created yet.\n");
928 return;
929 } else if (!lq_sta->drv) {
930 IWL_DEBUG_RATE(priv, "Rate scaling not initialized yet.\n");
931 return;
932 }
933
934 if (!ieee80211_is_data(hdr->frame_control) ||
935 info->flags & IEEE80211_TX_CTL_NO_ACK)
936 return;
937
938
939 if ((info->flags & IEEE80211_TX_CTL_AMPDU) &&
940 !(info->flags & IEEE80211_TX_STAT_AMPDU))
941 return;
942
943
944
945
946
947
948
949
950
951 table = &lq_sta->lq;
952 tx_rate = le32_to_cpu(table->rs_table[0].rate_n_flags);
953 rs_get_tbl_info_from_mcs(tx_rate, priv->band, &tbl_type, &rs_index);
954 if (priv->band == IEEE80211_BAND_5GHZ)
955 rs_index -= IWL_FIRST_OFDM_RATE;
956 mac_flags = info->status.rates[0].flags;
957 mac_index = info->status.rates[0].idx;
958
959 if (mac_flags & IEEE80211_TX_RC_MCS) {
960 mac_index &= RATE_MCS_CODE_MSK;
961 if (mac_index >= (IWL_RATE_9M_INDEX - IWL_FIRST_OFDM_RATE))
962 mac_index++;
963
964
965
966
967 if (priv->band == IEEE80211_BAND_2GHZ)
968 mac_index += IWL_FIRST_OFDM_RATE;
969 }
970
971 if ((mac_index < 0) ||
972 (tbl_type.is_SGI != !!(mac_flags & IEEE80211_TX_RC_SHORT_GI)) ||
973 (tbl_type.is_ht40 != !!(mac_flags & IEEE80211_TX_RC_40_MHZ_WIDTH)) ||
974 (tbl_type.is_dup != !!(mac_flags & IEEE80211_TX_RC_DUP_DATA)) ||
975 (tbl_type.ant_type != info->status.antenna) ||
976 (!!(tx_rate & RATE_MCS_HT_MSK) != !!(mac_flags & IEEE80211_TX_RC_MCS)) ||
977 (!!(tx_rate & RATE_MCS_GF_MSK) != !!(mac_flags & IEEE80211_TX_RC_GREEN_FIELD)) ||
978 (rs_index != mac_index)) {
979 IWL_DEBUG_RATE(priv, "initial rate %d does not match %d (0x%x)\n", mac_index, rs_index, tx_rate);
980
981
982
983
984
985 lq_sta->missed_rate_counter++;
986 if (lq_sta->missed_rate_counter > IWL_MISSED_RATE_MAX) {
987 lq_sta->missed_rate_counter = 0;
988 iwl_send_lq_cmd(priv, ctx, &lq_sta->lq, CMD_ASYNC, false);
989 }
990
991 return;
992 } else
993
994 lq_sta->missed_rate_counter = 0;
995
996
997 if (table_type_matches(&tbl_type,
998 &(lq_sta->lq_info[lq_sta->active_tbl]))) {
999 curr_tbl = &(lq_sta->lq_info[lq_sta->active_tbl]);
1000 other_tbl = &(lq_sta->lq_info[1 - lq_sta->active_tbl]);
1001 } else if (table_type_matches(&tbl_type,
1002 &lq_sta->lq_info[1 - lq_sta->active_tbl])) {
1003 curr_tbl = &(lq_sta->lq_info[1 - lq_sta->active_tbl]);
1004 other_tbl = &(lq_sta->lq_info[lq_sta->active_tbl]);
1005 } else {
1006 IWL_DEBUG_RATE(priv, "Neither active nor search matches tx rate\n");
1007 tmp_tbl = &(lq_sta->lq_info[lq_sta->active_tbl]);
1008 IWL_DEBUG_RATE(priv, "active- lq:%x, ant:%x, SGI:%d\n",
1009 tmp_tbl->lq_type, tmp_tbl->ant_type, tmp_tbl->is_SGI);
1010 tmp_tbl = &(lq_sta->lq_info[1 - lq_sta->active_tbl]);
1011 IWL_DEBUG_RATE(priv, "search- lq:%x, ant:%x, SGI:%d\n",
1012 tmp_tbl->lq_type, tmp_tbl->ant_type, tmp_tbl->is_SGI);
1013 IWL_DEBUG_RATE(priv, "actual- lq:%x, ant:%x, SGI:%d\n",
1014 tbl_type.lq_type, tbl_type.ant_type, tbl_type.is_SGI);
1015
1016
1017
1018
1019 rs_stay_in_table(lq_sta, true);
1020 goto done;
1021 }
1022
1023
1024
1025
1026
1027
1028
1029
1030 if (info->flags & IEEE80211_TX_STAT_AMPDU) {
1031 tx_rate = le32_to_cpu(table->rs_table[0].rate_n_flags);
1032 rs_get_tbl_info_from_mcs(tx_rate, priv->band, &tbl_type,
1033 &rs_index);
1034 rs_collect_tx_data(curr_tbl, rs_index,
1035 info->status.ampdu_len,
1036 info->status.ampdu_ack_len);
1037
1038
1039 if (lq_sta->stay_in_tbl) {
1040 lq_sta->total_success += info->status.ampdu_ack_len;
1041 lq_sta->total_failed += (info->status.ampdu_len -
1042 info->status.ampdu_ack_len);
1043 }
1044 } else {
1045
1046
1047
1048 retries = info->status.rates[0].count - 1;
1049
1050 retries = min(retries, 15);
1051
1052
1053 legacy_success = !!(info->flags & IEEE80211_TX_STAT_ACK);
1054
1055 for (i = 0; i <= retries; ++i) {
1056 tx_rate = le32_to_cpu(table->rs_table[i].rate_n_flags);
1057 rs_get_tbl_info_from_mcs(tx_rate, priv->band,
1058 &tbl_type, &rs_index);
1059
1060
1061
1062
1063 if (table_type_matches(&tbl_type, curr_tbl))
1064 tmp_tbl = curr_tbl;
1065 else if (table_type_matches(&tbl_type, other_tbl))
1066 tmp_tbl = other_tbl;
1067 else
1068 continue;
1069 rs_collect_tx_data(tmp_tbl, rs_index, 1,
1070 i < retries ? 0 : legacy_success);
1071 }
1072
1073
1074 if (lq_sta->stay_in_tbl) {
1075 lq_sta->total_success += legacy_success;
1076 lq_sta->total_failed += retries + (1 - legacy_success);
1077 }
1078 }
1079
1080 lq_sta->last_rate_n_flags = tx_rate;
1081done:
1082
1083 if (sta && sta->supp_rates[sband->band])
1084 rs_rate_scale_perform(priv, skb, sta, lq_sta);
1085
1086#if defined(CONFIG_MAC80211_DEBUGFS) && defined(CONFIG_IWLWIFI_DEVICE_TESTMODE)
1087 if ((priv->tm_fixed_rate) &&
1088 (priv->tm_fixed_rate != lq_sta->dbg_fixed_rate))
1089 rs_program_fix_rate(priv, lq_sta);
1090#endif
1091 if (priv->cfg->bt_params && priv->cfg->bt_params->advanced_bt_coexist)
1092 rs_bt_update_lq(priv, ctx, lq_sta);
1093}
1094
1095
1096
1097
1098
1099
1100
1101
1102
1103static void rs_set_stay_in_table(struct iwl_priv *priv, u8 is_legacy,
1104 struct iwl_lq_sta *lq_sta)
1105{
1106 IWL_DEBUG_RATE(priv, "we are staying in the same table\n");
1107 lq_sta->stay_in_tbl = 1;
1108 if (is_legacy) {
1109 lq_sta->table_count_limit = IWL_LEGACY_TABLE_COUNT;
1110 lq_sta->max_failure_limit = IWL_LEGACY_FAILURE_LIMIT;
1111 lq_sta->max_success_limit = IWL_LEGACY_SUCCESS_LIMIT;
1112 } else {
1113 lq_sta->table_count_limit = IWL_NONE_LEGACY_TABLE_COUNT;
1114 lq_sta->max_failure_limit = IWL_NONE_LEGACY_FAILURE_LIMIT;
1115 lq_sta->max_success_limit = IWL_NONE_LEGACY_SUCCESS_LIMIT;
1116 }
1117 lq_sta->table_count = 0;
1118 lq_sta->total_failed = 0;
1119 lq_sta->total_success = 0;
1120 lq_sta->flush_timer = jiffies;
1121 lq_sta->action_counter = 0;
1122}
1123
1124
1125
1126
1127static void rs_set_expected_tpt_table(struct iwl_lq_sta *lq_sta,
1128 struct iwl_scale_tbl_info *tbl)
1129{
1130
1131 s32 (*ht_tbl_pointer)[IWL_RATE_COUNT];
1132
1133
1134 if (WARN_ON_ONCE(!is_legacy(tbl->lq_type) && !is_Ht(tbl->lq_type))) {
1135 tbl->expected_tpt = expected_tpt_legacy;
1136 return;
1137 }
1138
1139
1140 if (is_legacy(tbl->lq_type)) {
1141 tbl->expected_tpt = expected_tpt_legacy;
1142 return;
1143 }
1144
1145
1146
1147
1148 if (is_siso(tbl->lq_type) && (!tbl->is_ht40 || lq_sta->is_dup))
1149 ht_tbl_pointer = expected_tpt_siso20MHz;
1150 else if (is_siso(tbl->lq_type))
1151 ht_tbl_pointer = expected_tpt_siso40MHz;
1152 else if (is_mimo2(tbl->lq_type) && (!tbl->is_ht40 || lq_sta->is_dup))
1153 ht_tbl_pointer = expected_tpt_mimo2_20MHz;
1154 else if (is_mimo2(tbl->lq_type))
1155 ht_tbl_pointer = expected_tpt_mimo2_40MHz;
1156 else if (is_mimo3(tbl->lq_type) && (!tbl->is_ht40 || lq_sta->is_dup))
1157 ht_tbl_pointer = expected_tpt_mimo3_20MHz;
1158 else
1159 ht_tbl_pointer = expected_tpt_mimo3_40MHz;
1160
1161 if (!tbl->is_SGI && !lq_sta->is_agg)
1162 tbl->expected_tpt = ht_tbl_pointer[0];
1163 else if (tbl->is_SGI && !lq_sta->is_agg)
1164 tbl->expected_tpt = ht_tbl_pointer[1];
1165 else if (!tbl->is_SGI && lq_sta->is_agg)
1166 tbl->expected_tpt = ht_tbl_pointer[2];
1167 else
1168 tbl->expected_tpt = ht_tbl_pointer[3];
1169}
1170
1171
1172
1173
1174
1175
1176
1177
1178
1179
1180
1181
1182
1183static s32 rs_get_best_rate(struct iwl_priv *priv,
1184 struct iwl_lq_sta *lq_sta,
1185 struct iwl_scale_tbl_info *tbl,
1186 u16 rate_mask, s8 index)
1187{
1188
1189 struct iwl_scale_tbl_info *active_tbl =
1190 &(lq_sta->lq_info[lq_sta->active_tbl]);
1191 s32 active_sr = active_tbl->win[index].success_ratio;
1192 s32 active_tpt = active_tbl->expected_tpt[index];
1193
1194
1195 s32 *tpt_tbl = tbl->expected_tpt;
1196
1197 s32 new_rate, high, low, start_hi;
1198 u16 high_low;
1199 s8 rate = index;
1200
1201 new_rate = high = low = start_hi = IWL_RATE_INVALID;
1202
1203 for (; ;) {
1204 high_low = rs_get_adjacent_rate(priv, rate, rate_mask,
1205 tbl->lq_type);
1206
1207 low = high_low & 0xff;
1208 high = (high_low >> 8) & 0xff;
1209
1210
1211
1212
1213
1214
1215
1216
1217
1218
1219
1220
1221
1222
1223
1224
1225 if ((((100 * tpt_tbl[rate]) > lq_sta->last_tpt) &&
1226 ((active_sr > IWL_RATE_DECREASE_TH) &&
1227 (active_sr <= IWL_RATE_HIGH_TH) &&
1228 (tpt_tbl[rate] <= active_tpt))) ||
1229 ((active_sr >= IWL_RATE_SCALE_SWITCH) &&
1230 (tpt_tbl[rate] > active_tpt))) {
1231
1232
1233
1234
1235 if (start_hi != IWL_RATE_INVALID) {
1236 new_rate = start_hi;
1237 break;
1238 }
1239
1240 new_rate = rate;
1241
1242
1243 if (low != IWL_RATE_INVALID)
1244 rate = low;
1245
1246
1247 else
1248 break;
1249
1250
1251 } else {
1252
1253
1254
1255 if (new_rate != IWL_RATE_INVALID)
1256 break;
1257
1258
1259 else if (high != IWL_RATE_INVALID) {
1260 start_hi = high;
1261 rate = high;
1262
1263
1264 } else {
1265 new_rate = rate;
1266 break;
1267 }
1268 }
1269 }
1270
1271 return new_rate;
1272}
1273
1274
1275
1276
1277static int rs_switch_to_mimo2(struct iwl_priv *priv,
1278 struct iwl_lq_sta *lq_sta,
1279 struct ieee80211_conf *conf,
1280 struct ieee80211_sta *sta,
1281 struct iwl_scale_tbl_info *tbl, int index)
1282{
1283 u16 rate_mask;
1284 s32 rate;
1285 s8 is_green = lq_sta->is_green;
1286 struct iwl_station_priv *sta_priv = (void *)sta->drv_priv;
1287 struct iwl_rxon_context *ctx = sta_priv->ctx;
1288
1289 if (!conf_is_ht(conf) || !sta->ht_cap.ht_supported)
1290 return -1;
1291
1292 if (sta->smps_mode == IEEE80211_SMPS_STATIC)
1293 return -1;
1294
1295
1296 if (priv->hw_params.tx_chains_num < 2)
1297 return -1;
1298
1299 IWL_DEBUG_RATE(priv, "LQ: try to switch to MIMO2\n");
1300
1301 tbl->lq_type = LQ_MIMO2;
1302 tbl->is_dup = lq_sta->is_dup;
1303 tbl->action = 0;
1304 tbl->max_search = IWL_MAX_SEARCH;
1305 rate_mask = lq_sta->active_mimo2_rate;
1306
1307 if (iwl_is_ht40_tx_allowed(priv, ctx, sta))
1308 tbl->is_ht40 = 1;
1309 else
1310 tbl->is_ht40 = 0;
1311
1312 rs_set_expected_tpt_table(lq_sta, tbl);
1313
1314 rate = rs_get_best_rate(priv, lq_sta, tbl, rate_mask, index);
1315
1316 IWL_DEBUG_RATE(priv, "LQ: MIMO2 best rate %d mask %X\n", rate, rate_mask);
1317 if ((rate == IWL_RATE_INVALID) || !((1 << rate) & rate_mask)) {
1318 IWL_DEBUG_RATE(priv, "Can't switch with index %d rate mask %x\n",
1319 rate, rate_mask);
1320 return -1;
1321 }
1322 tbl->current_rate = rate_n_flags_from_tbl(priv, tbl, rate, is_green);
1323
1324 IWL_DEBUG_RATE(priv, "LQ: Switch to new mcs %X index is green %X\n",
1325 tbl->current_rate, is_green);
1326 return 0;
1327}
1328
1329
1330
1331
1332static int rs_switch_to_mimo3(struct iwl_priv *priv,
1333 struct iwl_lq_sta *lq_sta,
1334 struct ieee80211_conf *conf,
1335 struct ieee80211_sta *sta,
1336 struct iwl_scale_tbl_info *tbl, int index)
1337{
1338 u16 rate_mask;
1339 s32 rate;
1340 s8 is_green = lq_sta->is_green;
1341 struct iwl_station_priv *sta_priv = (void *)sta->drv_priv;
1342 struct iwl_rxon_context *ctx = sta_priv->ctx;
1343
1344 if (!conf_is_ht(conf) || !sta->ht_cap.ht_supported)
1345 return -1;
1346
1347 if (sta->smps_mode == IEEE80211_SMPS_STATIC)
1348 return -1;
1349
1350
1351 if (priv->hw_params.tx_chains_num < 3)
1352 return -1;
1353
1354 IWL_DEBUG_RATE(priv, "LQ: try to switch to MIMO3\n");
1355
1356 tbl->lq_type = LQ_MIMO3;
1357 tbl->is_dup = lq_sta->is_dup;
1358 tbl->action = 0;
1359 tbl->max_search = IWL_MAX_11N_MIMO3_SEARCH;
1360 rate_mask = lq_sta->active_mimo3_rate;
1361
1362 if (iwl_is_ht40_tx_allowed(priv, ctx, sta))
1363 tbl->is_ht40 = 1;
1364 else
1365 tbl->is_ht40 = 0;
1366
1367 rs_set_expected_tpt_table(lq_sta, tbl);
1368
1369 rate = rs_get_best_rate(priv, lq_sta, tbl, rate_mask, index);
1370
1371 IWL_DEBUG_RATE(priv, "LQ: MIMO3 best rate %d mask %X\n",
1372 rate, rate_mask);
1373 if ((rate == IWL_RATE_INVALID) || !((1 << rate) & rate_mask)) {
1374 IWL_DEBUG_RATE(priv, "Can't switch with index %d rate mask %x\n",
1375 rate, rate_mask);
1376 return -1;
1377 }
1378 tbl->current_rate = rate_n_flags_from_tbl(priv, tbl, rate, is_green);
1379
1380 IWL_DEBUG_RATE(priv, "LQ: Switch to new mcs %X index is green %X\n",
1381 tbl->current_rate, is_green);
1382 return 0;
1383}
1384
1385
1386
1387
1388static int rs_switch_to_siso(struct iwl_priv *priv,
1389 struct iwl_lq_sta *lq_sta,
1390 struct ieee80211_conf *conf,
1391 struct ieee80211_sta *sta,
1392 struct iwl_scale_tbl_info *tbl, int index)
1393{
1394 u16 rate_mask;
1395 u8 is_green = lq_sta->is_green;
1396 s32 rate;
1397 struct iwl_station_priv *sta_priv = (void *)sta->drv_priv;
1398 struct iwl_rxon_context *ctx = sta_priv->ctx;
1399
1400 if (!conf_is_ht(conf) || !sta->ht_cap.ht_supported)
1401 return -1;
1402
1403 IWL_DEBUG_RATE(priv, "LQ: try to switch to SISO\n");
1404
1405 tbl->is_dup = lq_sta->is_dup;
1406 tbl->lq_type = LQ_SISO;
1407 tbl->action = 0;
1408 tbl->max_search = IWL_MAX_SEARCH;
1409 rate_mask = lq_sta->active_siso_rate;
1410
1411 if (iwl_is_ht40_tx_allowed(priv, ctx, sta))
1412 tbl->is_ht40 = 1;
1413 else
1414 tbl->is_ht40 = 0;
1415
1416 if (is_green)
1417 tbl->is_SGI = 0;
1418
1419 rs_set_expected_tpt_table(lq_sta, tbl);
1420 rate = rs_get_best_rate(priv, lq_sta, tbl, rate_mask, index);
1421
1422 IWL_DEBUG_RATE(priv, "LQ: get best rate %d mask %X\n", rate, rate_mask);
1423 if ((rate == IWL_RATE_INVALID) || !((1 << rate) & rate_mask)) {
1424 IWL_DEBUG_RATE(priv, "can not switch with index %d rate mask %x\n",
1425 rate, rate_mask);
1426 return -1;
1427 }
1428 tbl->current_rate = rate_n_flags_from_tbl(priv, tbl, rate, is_green);
1429 IWL_DEBUG_RATE(priv, "LQ: Switch to new mcs %X index is green %X\n",
1430 tbl->current_rate, is_green);
1431 return 0;
1432}
1433
1434
1435
1436
1437static int rs_move_legacy_other(struct iwl_priv *priv,
1438 struct iwl_lq_sta *lq_sta,
1439 struct ieee80211_conf *conf,
1440 struct ieee80211_sta *sta,
1441 int index)
1442{
1443 struct iwl_scale_tbl_info *tbl = &(lq_sta->lq_info[lq_sta->active_tbl]);
1444 struct iwl_scale_tbl_info *search_tbl =
1445 &(lq_sta->lq_info[(1 - lq_sta->active_tbl)]);
1446 struct iwl_rate_scale_data *window = &(tbl->win[index]);
1447 u32 sz = (sizeof(struct iwl_scale_tbl_info) -
1448 (sizeof(struct iwl_rate_scale_data) * IWL_RATE_COUNT));
1449 u8 start_action;
1450 u8 valid_tx_ant = priv->nvm_data->valid_tx_ant;
1451 u8 tx_chains_num = priv->hw_params.tx_chains_num;
1452 int ret = 0;
1453 u8 update_search_tbl_counter = 0;
1454
1455 switch (priv->bt_traffic_load) {
1456 case IWL_BT_COEX_TRAFFIC_LOAD_NONE:
1457
1458 break;
1459 case IWL_BT_COEX_TRAFFIC_LOAD_LOW:
1460
1461 if (tbl->action == IWL_LEGACY_SWITCH_ANTENNA2)
1462 tbl->action = IWL_LEGACY_SWITCH_SISO;
1463 break;
1464 case IWL_BT_COEX_TRAFFIC_LOAD_HIGH:
1465 case IWL_BT_COEX_TRAFFIC_LOAD_CONTINUOUS:
1466
1467 valid_tx_ant =
1468 first_antenna(priv->nvm_data->valid_tx_ant);
1469 if (tbl->action >= IWL_LEGACY_SWITCH_ANTENNA2 &&
1470 tbl->action != IWL_LEGACY_SWITCH_SISO)
1471 tbl->action = IWL_LEGACY_SWITCH_SISO;
1472 break;
1473 default:
1474 IWL_ERR(priv, "Invalid BT load %d", priv->bt_traffic_load);
1475 break;
1476 }
1477
1478 if (!iwl_ht_enabled(priv))
1479
1480 tbl->action = IWL_LEGACY_SWITCH_ANTENNA1;
1481 else if (iwl_tx_ant_restriction(priv) == IWL_ANT_OK_SINGLE &&
1482 tbl->action > IWL_LEGACY_SWITCH_SISO)
1483 tbl->action = IWL_LEGACY_SWITCH_SISO;
1484
1485
1486 if (priv->bt_full_concurrent) {
1487 if (!iwl_ht_enabled(priv))
1488 tbl->action = IWL_LEGACY_SWITCH_ANTENNA1;
1489 else if (tbl->action >= IWL_LEGACY_SWITCH_ANTENNA2)
1490 tbl->action = IWL_LEGACY_SWITCH_SISO;
1491 valid_tx_ant =
1492 first_antenna(priv->nvm_data->valid_tx_ant);
1493 }
1494
1495 start_action = tbl->action;
1496 for (; ;) {
1497 lq_sta->action_counter++;
1498 switch (tbl->action) {
1499 case IWL_LEGACY_SWITCH_ANTENNA1:
1500 case IWL_LEGACY_SWITCH_ANTENNA2:
1501 IWL_DEBUG_RATE(priv, "LQ: Legacy toggle Antenna\n");
1502
1503 if ((tbl->action == IWL_LEGACY_SWITCH_ANTENNA1 &&
1504 tx_chains_num <= 1) ||
1505 (tbl->action == IWL_LEGACY_SWITCH_ANTENNA2 &&
1506 tx_chains_num <= 2))
1507 break;
1508
1509
1510 if (window->success_ratio >= IWL_RS_GOOD_RATIO &&
1511 !priv->bt_full_concurrent &&
1512 priv->bt_traffic_load ==
1513 IWL_BT_COEX_TRAFFIC_LOAD_NONE)
1514 break;
1515
1516
1517 memcpy(search_tbl, tbl, sz);
1518
1519 if (rs_toggle_antenna(valid_tx_ant,
1520 &search_tbl->current_rate, search_tbl)) {
1521 update_search_tbl_counter = 1;
1522 rs_set_expected_tpt_table(lq_sta, search_tbl);
1523 goto out;
1524 }
1525 break;
1526 case IWL_LEGACY_SWITCH_SISO:
1527 IWL_DEBUG_RATE(priv, "LQ: Legacy switch to SISO\n");
1528
1529
1530 memcpy(search_tbl, tbl, sz);
1531 search_tbl->is_SGI = 0;
1532 ret = rs_switch_to_siso(priv, lq_sta, conf, sta,
1533 search_tbl, index);
1534 if (!ret) {
1535 lq_sta->action_counter = 0;
1536 goto out;
1537 }
1538
1539 break;
1540 case IWL_LEGACY_SWITCH_MIMO2_AB:
1541 case IWL_LEGACY_SWITCH_MIMO2_AC:
1542 case IWL_LEGACY_SWITCH_MIMO2_BC:
1543 IWL_DEBUG_RATE(priv, "LQ: Legacy switch to MIMO2\n");
1544
1545
1546 memcpy(search_tbl, tbl, sz);
1547 search_tbl->is_SGI = 0;
1548
1549 if (tbl->action == IWL_LEGACY_SWITCH_MIMO2_AB)
1550 search_tbl->ant_type = ANT_AB;
1551 else if (tbl->action == IWL_LEGACY_SWITCH_MIMO2_AC)
1552 search_tbl->ant_type = ANT_AC;
1553 else
1554 search_tbl->ant_type = ANT_BC;
1555
1556 if (!rs_is_valid_ant(valid_tx_ant, search_tbl->ant_type))
1557 break;
1558
1559 ret = rs_switch_to_mimo2(priv, lq_sta, conf, sta,
1560 search_tbl, index);
1561 if (!ret) {
1562 lq_sta->action_counter = 0;
1563 goto out;
1564 }
1565 break;
1566
1567 case IWL_LEGACY_SWITCH_MIMO3_ABC:
1568 IWL_DEBUG_RATE(priv, "LQ: Legacy switch to MIMO3\n");
1569
1570
1571 memcpy(search_tbl, tbl, sz);
1572 search_tbl->is_SGI = 0;
1573
1574 search_tbl->ant_type = ANT_ABC;
1575
1576 if (!rs_is_valid_ant(valid_tx_ant, search_tbl->ant_type))
1577 break;
1578
1579 ret = rs_switch_to_mimo3(priv, lq_sta, conf, sta,
1580 search_tbl, index);
1581 if (!ret) {
1582 lq_sta->action_counter = 0;
1583 goto out;
1584 }
1585 break;
1586 }
1587 tbl->action++;
1588 if (tbl->action > IWL_LEGACY_SWITCH_MIMO3_ABC)
1589 tbl->action = IWL_LEGACY_SWITCH_ANTENNA1;
1590
1591 if (tbl->action == start_action)
1592 break;
1593
1594 }
1595 search_tbl->lq_type = LQ_NONE;
1596 return 0;
1597
1598out:
1599 lq_sta->search_better_tbl = 1;
1600 tbl->action++;
1601 if (tbl->action > IWL_LEGACY_SWITCH_MIMO3_ABC)
1602 tbl->action = IWL_LEGACY_SWITCH_ANTENNA1;
1603 if (update_search_tbl_counter)
1604 search_tbl->action = tbl->action;
1605 return 0;
1606
1607}
1608
1609
1610
1611
1612static int rs_move_siso_to_other(struct iwl_priv *priv,
1613 struct iwl_lq_sta *lq_sta,
1614 struct ieee80211_conf *conf,
1615 struct ieee80211_sta *sta, int index)
1616{
1617 u8 is_green = lq_sta->is_green;
1618 struct iwl_scale_tbl_info *tbl = &(lq_sta->lq_info[lq_sta->active_tbl]);
1619 struct iwl_scale_tbl_info *search_tbl =
1620 &(lq_sta->lq_info[(1 - lq_sta->active_tbl)]);
1621 struct iwl_rate_scale_data *window = &(tbl->win[index]);
1622 struct ieee80211_sta_ht_cap *ht_cap = &sta->ht_cap;
1623 u32 sz = (sizeof(struct iwl_scale_tbl_info) -
1624 (sizeof(struct iwl_rate_scale_data) * IWL_RATE_COUNT));
1625 u8 start_action;
1626 u8 valid_tx_ant = priv->nvm_data->valid_tx_ant;
1627 u8 tx_chains_num = priv->hw_params.tx_chains_num;
1628 u8 update_search_tbl_counter = 0;
1629 int ret;
1630
1631 switch (priv->bt_traffic_load) {
1632 case IWL_BT_COEX_TRAFFIC_LOAD_NONE:
1633
1634 break;
1635 case IWL_BT_COEX_TRAFFIC_LOAD_LOW:
1636
1637 if (tbl->action == IWL_SISO_SWITCH_ANTENNA2)
1638 tbl->action = IWL_SISO_SWITCH_MIMO2_AB;
1639 break;
1640 case IWL_BT_COEX_TRAFFIC_LOAD_HIGH:
1641 case IWL_BT_COEX_TRAFFIC_LOAD_CONTINUOUS:
1642
1643 valid_tx_ant =
1644 first_antenna(priv->nvm_data->valid_tx_ant);
1645 if (tbl->action != IWL_SISO_SWITCH_ANTENNA1)
1646 tbl->action = IWL_SISO_SWITCH_ANTENNA1;
1647 break;
1648 default:
1649 IWL_ERR(priv, "Invalid BT load %d", priv->bt_traffic_load);
1650 break;
1651 }
1652
1653 if (iwl_tx_ant_restriction(priv) == IWL_ANT_OK_SINGLE &&
1654 tbl->action > IWL_SISO_SWITCH_ANTENNA2) {
1655
1656 tbl->action = IWL_SISO_SWITCH_ANTENNA1;
1657 }
1658
1659
1660 if (priv->bt_full_concurrent) {
1661 valid_tx_ant =
1662 first_antenna(priv->nvm_data->valid_tx_ant);
1663 if (tbl->action >= IWL_LEGACY_SWITCH_ANTENNA2)
1664 tbl->action = IWL_SISO_SWITCH_ANTENNA1;
1665 }
1666
1667 start_action = tbl->action;
1668 for (;;) {
1669 lq_sta->action_counter++;
1670 switch (tbl->action) {
1671 case IWL_SISO_SWITCH_ANTENNA1:
1672 case IWL_SISO_SWITCH_ANTENNA2:
1673 IWL_DEBUG_RATE(priv, "LQ: SISO toggle Antenna\n");
1674 if ((tbl->action == IWL_SISO_SWITCH_ANTENNA1 &&
1675 tx_chains_num <= 1) ||
1676 (tbl->action == IWL_SISO_SWITCH_ANTENNA2 &&
1677 tx_chains_num <= 2))
1678 break;
1679
1680 if (window->success_ratio >= IWL_RS_GOOD_RATIO &&
1681 !priv->bt_full_concurrent &&
1682 priv->bt_traffic_load ==
1683 IWL_BT_COEX_TRAFFIC_LOAD_NONE)
1684 break;
1685
1686 memcpy(search_tbl, tbl, sz);
1687 if (rs_toggle_antenna(valid_tx_ant,
1688 &search_tbl->current_rate, search_tbl)) {
1689 update_search_tbl_counter = 1;
1690 goto out;
1691 }
1692 break;
1693 case IWL_SISO_SWITCH_MIMO2_AB:
1694 case IWL_SISO_SWITCH_MIMO2_AC:
1695 case IWL_SISO_SWITCH_MIMO2_BC:
1696 IWL_DEBUG_RATE(priv, "LQ: SISO switch to MIMO2\n");
1697 memcpy(search_tbl, tbl, sz);
1698 search_tbl->is_SGI = 0;
1699
1700 if (tbl->action == IWL_SISO_SWITCH_MIMO2_AB)
1701 search_tbl->ant_type = ANT_AB;
1702 else if (tbl->action == IWL_SISO_SWITCH_MIMO2_AC)
1703 search_tbl->ant_type = ANT_AC;
1704 else
1705 search_tbl->ant_type = ANT_BC;
1706
1707 if (!rs_is_valid_ant(valid_tx_ant, search_tbl->ant_type))
1708 break;
1709
1710 ret = rs_switch_to_mimo2(priv, lq_sta, conf, sta,
1711 search_tbl, index);
1712 if (!ret)
1713 goto out;
1714 break;
1715 case IWL_SISO_SWITCH_GI:
1716 if (!tbl->is_ht40 && !(ht_cap->cap &
1717 IEEE80211_HT_CAP_SGI_20))
1718 break;
1719 if (tbl->is_ht40 && !(ht_cap->cap &
1720 IEEE80211_HT_CAP_SGI_40))
1721 break;
1722
1723 IWL_DEBUG_RATE(priv, "LQ: SISO toggle SGI/NGI\n");
1724
1725 memcpy(search_tbl, tbl, sz);
1726 if (is_green) {
1727 if (!tbl->is_SGI)
1728 break;
1729 else
1730 IWL_ERR(priv,
1731 "SGI was set in GF+SISO\n");
1732 }
1733 search_tbl->is_SGI = !tbl->is_SGI;
1734 rs_set_expected_tpt_table(lq_sta, search_tbl);
1735 if (tbl->is_SGI) {
1736 s32 tpt = lq_sta->last_tpt / 100;
1737 if (tpt >= search_tbl->expected_tpt[index])
1738 break;
1739 }
1740 search_tbl->current_rate =
1741 rate_n_flags_from_tbl(priv, search_tbl,
1742 index, is_green);
1743 update_search_tbl_counter = 1;
1744 goto out;
1745 case IWL_SISO_SWITCH_MIMO3_ABC:
1746 IWL_DEBUG_RATE(priv, "LQ: SISO switch to MIMO3\n");
1747 memcpy(search_tbl, tbl, sz);
1748 search_tbl->is_SGI = 0;
1749 search_tbl->ant_type = ANT_ABC;
1750
1751 if (!rs_is_valid_ant(valid_tx_ant, search_tbl->ant_type))
1752 break;
1753
1754 ret = rs_switch_to_mimo3(priv, lq_sta, conf, sta,
1755 search_tbl, index);
1756 if (!ret)
1757 goto out;
1758 break;
1759 }
1760 tbl->action++;
1761 if (tbl->action > IWL_LEGACY_SWITCH_MIMO3_ABC)
1762 tbl->action = IWL_SISO_SWITCH_ANTENNA1;
1763
1764 if (tbl->action == start_action)
1765 break;
1766 }
1767 search_tbl->lq_type = LQ_NONE;
1768 return 0;
1769
1770 out:
1771 lq_sta->search_better_tbl = 1;
1772 tbl->action++;
1773 if (tbl->action > IWL_SISO_SWITCH_MIMO3_ABC)
1774 tbl->action = IWL_SISO_SWITCH_ANTENNA1;
1775 if (update_search_tbl_counter)
1776 search_tbl->action = tbl->action;
1777
1778 return 0;
1779}
1780
1781
1782
1783
1784static int rs_move_mimo2_to_other(struct iwl_priv *priv,
1785 struct iwl_lq_sta *lq_sta,
1786 struct ieee80211_conf *conf,
1787 struct ieee80211_sta *sta, int index)
1788{
1789 s8 is_green = lq_sta->is_green;
1790 struct iwl_scale_tbl_info *tbl = &(lq_sta->lq_info[lq_sta->active_tbl]);
1791 struct iwl_scale_tbl_info *search_tbl =
1792 &(lq_sta->lq_info[(1 - lq_sta->active_tbl)]);
1793 struct iwl_rate_scale_data *window = &(tbl->win[index]);
1794 struct ieee80211_sta_ht_cap *ht_cap = &sta->ht_cap;
1795 u32 sz = (sizeof(struct iwl_scale_tbl_info) -
1796 (sizeof(struct iwl_rate_scale_data) * IWL_RATE_COUNT));
1797 u8 start_action;
1798 u8 valid_tx_ant = priv->nvm_data->valid_tx_ant;
1799 u8 tx_chains_num = priv->hw_params.tx_chains_num;
1800 u8 update_search_tbl_counter = 0;
1801 int ret;
1802
1803 switch (priv->bt_traffic_load) {
1804 case IWL_BT_COEX_TRAFFIC_LOAD_NONE:
1805
1806 break;
1807 case IWL_BT_COEX_TRAFFIC_LOAD_HIGH:
1808 case IWL_BT_COEX_TRAFFIC_LOAD_CONTINUOUS:
1809
1810 if (tbl->action != IWL_MIMO2_SWITCH_SISO_A)
1811 tbl->action = IWL_MIMO2_SWITCH_SISO_A;
1812 break;
1813 case IWL_BT_COEX_TRAFFIC_LOAD_LOW:
1814
1815 if (tbl->action == IWL_MIMO2_SWITCH_SISO_B ||
1816 tbl->action == IWL_MIMO2_SWITCH_SISO_C)
1817 tbl->action = IWL_MIMO2_SWITCH_SISO_A;
1818 break;
1819 default:
1820 IWL_ERR(priv, "Invalid BT load %d", priv->bt_traffic_load);
1821 break;
1822 }
1823
1824 if ((iwl_tx_ant_restriction(priv) == IWL_ANT_OK_SINGLE) &&
1825 (tbl->action < IWL_MIMO2_SWITCH_SISO_A ||
1826 tbl->action > IWL_MIMO2_SWITCH_SISO_C)) {
1827
1828 tbl->action = IWL_MIMO2_SWITCH_SISO_A;
1829 }
1830
1831
1832 if (priv->bt_full_concurrent &&
1833 (tbl->action < IWL_MIMO2_SWITCH_SISO_A ||
1834 tbl->action > IWL_MIMO2_SWITCH_SISO_C))
1835 tbl->action = IWL_MIMO2_SWITCH_SISO_A;
1836
1837 start_action = tbl->action;
1838 for (;;) {
1839 lq_sta->action_counter++;
1840 switch (tbl->action) {
1841 case IWL_MIMO2_SWITCH_ANTENNA1:
1842 case IWL_MIMO2_SWITCH_ANTENNA2:
1843 IWL_DEBUG_RATE(priv, "LQ: MIMO2 toggle Antennas\n");
1844
1845 if (tx_chains_num <= 2)
1846 break;
1847
1848 if (window->success_ratio >= IWL_RS_GOOD_RATIO)
1849 break;
1850
1851 memcpy(search_tbl, tbl, sz);
1852 if (rs_toggle_antenna(valid_tx_ant,
1853 &search_tbl->current_rate, search_tbl)) {
1854 update_search_tbl_counter = 1;
1855 goto out;
1856 }
1857 break;
1858 case IWL_MIMO2_SWITCH_SISO_A:
1859 case IWL_MIMO2_SWITCH_SISO_B:
1860 case IWL_MIMO2_SWITCH_SISO_C:
1861 IWL_DEBUG_RATE(priv, "LQ: MIMO2 switch to SISO\n");
1862
1863
1864 memcpy(search_tbl, tbl, sz);
1865
1866 if (tbl->action == IWL_MIMO2_SWITCH_SISO_A)
1867 search_tbl->ant_type = ANT_A;
1868 else if (tbl->action == IWL_MIMO2_SWITCH_SISO_B)
1869 search_tbl->ant_type = ANT_B;
1870 else
1871 search_tbl->ant_type = ANT_C;
1872
1873 if (!rs_is_valid_ant(valid_tx_ant, search_tbl->ant_type))
1874 break;
1875
1876 ret = rs_switch_to_siso(priv, lq_sta, conf, sta,
1877 search_tbl, index);
1878 if (!ret)
1879 goto out;
1880
1881 break;
1882
1883 case IWL_MIMO2_SWITCH_GI:
1884 if (!tbl->is_ht40 && !(ht_cap->cap &
1885 IEEE80211_HT_CAP_SGI_20))
1886 break;
1887 if (tbl->is_ht40 && !(ht_cap->cap &
1888 IEEE80211_HT_CAP_SGI_40))
1889 break;
1890
1891 IWL_DEBUG_RATE(priv, "LQ: MIMO2 toggle SGI/NGI\n");
1892
1893
1894 memcpy(search_tbl, tbl, sz);
1895 search_tbl->is_SGI = !tbl->is_SGI;
1896 rs_set_expected_tpt_table(lq_sta, search_tbl);
1897
1898
1899
1900
1901
1902
1903 if (tbl->is_SGI) {
1904 s32 tpt = lq_sta->last_tpt / 100;
1905 if (tpt >= search_tbl->expected_tpt[index])
1906 break;
1907 }
1908 search_tbl->current_rate =
1909 rate_n_flags_from_tbl(priv, search_tbl,
1910 index, is_green);
1911 update_search_tbl_counter = 1;
1912 goto out;
1913
1914 case IWL_MIMO2_SWITCH_MIMO3_ABC:
1915 IWL_DEBUG_RATE(priv, "LQ: MIMO2 switch to MIMO3\n");
1916 memcpy(search_tbl, tbl, sz);
1917 search_tbl->is_SGI = 0;
1918 search_tbl->ant_type = ANT_ABC;
1919
1920 if (!rs_is_valid_ant(valid_tx_ant, search_tbl->ant_type))
1921 break;
1922
1923 ret = rs_switch_to_mimo3(priv, lq_sta, conf, sta,
1924 search_tbl, index);
1925 if (!ret)
1926 goto out;
1927
1928 break;
1929 }
1930 tbl->action++;
1931 if (tbl->action > IWL_MIMO2_SWITCH_MIMO3_ABC)
1932 tbl->action = IWL_MIMO2_SWITCH_ANTENNA1;
1933
1934 if (tbl->action == start_action)
1935 break;
1936 }
1937 search_tbl->lq_type = LQ_NONE;
1938 return 0;
1939 out:
1940 lq_sta->search_better_tbl = 1;
1941 tbl->action++;
1942 if (tbl->action > IWL_MIMO2_SWITCH_MIMO3_ABC)
1943 tbl->action = IWL_MIMO2_SWITCH_ANTENNA1;
1944 if (update_search_tbl_counter)
1945 search_tbl->action = tbl->action;
1946
1947 return 0;
1948
1949}
1950
1951
1952
1953
1954static int rs_move_mimo3_to_other(struct iwl_priv *priv,
1955 struct iwl_lq_sta *lq_sta,
1956 struct ieee80211_conf *conf,
1957 struct ieee80211_sta *sta, int index)
1958{
1959 s8 is_green = lq_sta->is_green;
1960 struct iwl_scale_tbl_info *tbl = &(lq_sta->lq_info[lq_sta->active_tbl]);
1961 struct iwl_scale_tbl_info *search_tbl =
1962 &(lq_sta->lq_info[(1 - lq_sta->active_tbl)]);
1963 struct iwl_rate_scale_data *window = &(tbl->win[index]);
1964 struct ieee80211_sta_ht_cap *ht_cap = &sta->ht_cap;
1965 u32 sz = (sizeof(struct iwl_scale_tbl_info) -
1966 (sizeof(struct iwl_rate_scale_data) * IWL_RATE_COUNT));
1967 u8 start_action;
1968 u8 valid_tx_ant = priv->nvm_data->valid_tx_ant;
1969 u8 tx_chains_num = priv->hw_params.tx_chains_num;
1970 int ret;
1971 u8 update_search_tbl_counter = 0;
1972
1973 switch (priv->bt_traffic_load) {
1974 case IWL_BT_COEX_TRAFFIC_LOAD_NONE:
1975
1976 break;
1977 case IWL_BT_COEX_TRAFFIC_LOAD_HIGH:
1978 case IWL_BT_COEX_TRAFFIC_LOAD_CONTINUOUS:
1979
1980 if (tbl->action != IWL_MIMO3_SWITCH_SISO_A)
1981 tbl->action = IWL_MIMO3_SWITCH_SISO_A;
1982 break;
1983 case IWL_BT_COEX_TRAFFIC_LOAD_LOW:
1984
1985 if (tbl->action == IWL_MIMO3_SWITCH_SISO_B ||
1986 tbl->action == IWL_MIMO3_SWITCH_SISO_C)
1987 tbl->action = IWL_MIMO3_SWITCH_SISO_A;
1988 break;
1989 default:
1990 IWL_ERR(priv, "Invalid BT load %d", priv->bt_traffic_load);
1991 break;
1992 }
1993
1994 if ((iwl_tx_ant_restriction(priv) == IWL_ANT_OK_SINGLE) &&
1995 (tbl->action < IWL_MIMO3_SWITCH_SISO_A ||
1996 tbl->action > IWL_MIMO3_SWITCH_SISO_C)) {
1997
1998 tbl->action = IWL_MIMO3_SWITCH_SISO_A;
1999 }
2000
2001
2002 if (priv->bt_full_concurrent &&
2003 (tbl->action < IWL_MIMO3_SWITCH_SISO_A ||
2004 tbl->action > IWL_MIMO3_SWITCH_SISO_C))
2005 tbl->action = IWL_MIMO3_SWITCH_SISO_A;
2006
2007 start_action = tbl->action;
2008 for (;;) {
2009 lq_sta->action_counter++;
2010 switch (tbl->action) {
2011 case IWL_MIMO3_SWITCH_ANTENNA1:
2012 case IWL_MIMO3_SWITCH_ANTENNA2:
2013 IWL_DEBUG_RATE(priv, "LQ: MIMO3 toggle Antennas\n");
2014
2015 if (tx_chains_num <= 3)
2016 break;
2017
2018 if (window->success_ratio >= IWL_RS_GOOD_RATIO)
2019 break;
2020
2021 memcpy(search_tbl, tbl, sz);
2022 if (rs_toggle_antenna(valid_tx_ant,
2023 &search_tbl->current_rate, search_tbl))
2024 goto out;
2025 break;
2026 case IWL_MIMO3_SWITCH_SISO_A:
2027 case IWL_MIMO3_SWITCH_SISO_B:
2028 case IWL_MIMO3_SWITCH_SISO_C:
2029 IWL_DEBUG_RATE(priv, "LQ: MIMO3 switch to SISO\n");
2030
2031
2032 memcpy(search_tbl, tbl, sz);
2033
2034 if (tbl->action == IWL_MIMO3_SWITCH_SISO_A)
2035 search_tbl->ant_type = ANT_A;
2036 else if (tbl->action == IWL_MIMO3_SWITCH_SISO_B)
2037 search_tbl->ant_type = ANT_B;
2038 else
2039 search_tbl->ant_type = ANT_C;
2040
2041 if (!rs_is_valid_ant(valid_tx_ant, search_tbl->ant_type))
2042 break;
2043
2044 ret = rs_switch_to_siso(priv, lq_sta, conf, sta,
2045 search_tbl, index);
2046 if (!ret)
2047 goto out;
2048
2049 break;
2050
2051 case IWL_MIMO3_SWITCH_MIMO2_AB:
2052 case IWL_MIMO3_SWITCH_MIMO2_AC:
2053 case IWL_MIMO3_SWITCH_MIMO2_BC:
2054 IWL_DEBUG_RATE(priv, "LQ: MIMO3 switch to MIMO2\n");
2055
2056 memcpy(search_tbl, tbl, sz);
2057 search_tbl->is_SGI = 0;
2058 if (tbl->action == IWL_MIMO3_SWITCH_MIMO2_AB)
2059 search_tbl->ant_type = ANT_AB;
2060 else if (tbl->action == IWL_MIMO3_SWITCH_MIMO2_AC)
2061 search_tbl->ant_type = ANT_AC;
2062 else
2063 search_tbl->ant_type = ANT_BC;
2064
2065 if (!rs_is_valid_ant(valid_tx_ant, search_tbl->ant_type))
2066 break;
2067
2068 ret = rs_switch_to_mimo2(priv, lq_sta, conf, sta,
2069 search_tbl, index);
2070 if (!ret)
2071 goto out;
2072
2073 break;
2074
2075 case IWL_MIMO3_SWITCH_GI:
2076 if (!tbl->is_ht40 && !(ht_cap->cap &
2077 IEEE80211_HT_CAP_SGI_20))
2078 break;
2079 if (tbl->is_ht40 && !(ht_cap->cap &
2080 IEEE80211_HT_CAP_SGI_40))
2081 break;
2082
2083 IWL_DEBUG_RATE(priv, "LQ: MIMO3 toggle SGI/NGI\n");
2084
2085
2086 memcpy(search_tbl, tbl, sz);
2087 search_tbl->is_SGI = !tbl->is_SGI;
2088 rs_set_expected_tpt_table(lq_sta, search_tbl);
2089
2090
2091
2092
2093
2094
2095 if (tbl->is_SGI) {
2096 s32 tpt = lq_sta->last_tpt / 100;
2097 if (tpt >= search_tbl->expected_tpt[index])
2098 break;
2099 }
2100 search_tbl->current_rate =
2101 rate_n_flags_from_tbl(priv, search_tbl,
2102 index, is_green);
2103 update_search_tbl_counter = 1;
2104 goto out;
2105 }
2106 tbl->action++;
2107 if (tbl->action > IWL_MIMO3_SWITCH_GI)
2108 tbl->action = IWL_MIMO3_SWITCH_ANTENNA1;
2109
2110 if (tbl->action == start_action)
2111 break;
2112 }
2113 search_tbl->lq_type = LQ_NONE;
2114 return 0;
2115 out:
2116 lq_sta->search_better_tbl = 1;
2117 tbl->action++;
2118 if (tbl->action > IWL_MIMO3_SWITCH_GI)
2119 tbl->action = IWL_MIMO3_SWITCH_ANTENNA1;
2120 if (update_search_tbl_counter)
2121 search_tbl->action = tbl->action;
2122
2123 return 0;
2124
2125}
2126
2127
2128
2129
2130
2131
2132
2133
2134static void rs_stay_in_table(struct iwl_lq_sta *lq_sta, bool force_search)
2135{
2136 struct iwl_scale_tbl_info *tbl;
2137 int i;
2138 int active_tbl;
2139 int flush_interval_passed = 0;
2140 struct iwl_priv *priv;
2141
2142 priv = lq_sta->drv;
2143 active_tbl = lq_sta->active_tbl;
2144
2145 tbl = &(lq_sta->lq_info[active_tbl]);
2146
2147
2148 if (lq_sta->stay_in_tbl) {
2149
2150
2151 if (lq_sta->flush_timer)
2152 flush_interval_passed =
2153 time_after(jiffies,
2154 (unsigned long)(lq_sta->flush_timer +
2155 IWL_RATE_SCALE_FLUSH_INTVL));
2156
2157
2158
2159
2160
2161
2162
2163
2164
2165 if (force_search ||
2166 (lq_sta->total_failed > lq_sta->max_failure_limit) ||
2167 (lq_sta->total_success > lq_sta->max_success_limit) ||
2168 ((!lq_sta->search_better_tbl) && (lq_sta->flush_timer)
2169 && (flush_interval_passed))) {
2170 IWL_DEBUG_RATE(priv, "LQ: stay is expired %d %d %d\n",
2171 lq_sta->total_failed,
2172 lq_sta->total_success,
2173 flush_interval_passed);
2174
2175
2176 lq_sta->stay_in_tbl = 0;
2177 lq_sta->total_failed = 0;
2178 lq_sta->total_success = 0;
2179 lq_sta->flush_timer = 0;
2180
2181
2182
2183
2184
2185
2186
2187 } else {
2188 lq_sta->table_count++;
2189 if (lq_sta->table_count >=
2190 lq_sta->table_count_limit) {
2191 lq_sta->table_count = 0;
2192
2193 IWL_DEBUG_RATE(priv, "LQ: stay in table clear win\n");
2194 for (i = 0; i < IWL_RATE_COUNT; i++)
2195 rs_rate_scale_clear_window(
2196 &(tbl->win[i]));
2197 }
2198 }
2199
2200
2201
2202
2203 if (!lq_sta->stay_in_tbl) {
2204 for (i = 0; i < IWL_RATE_COUNT; i++)
2205 rs_rate_scale_clear_window(&(tbl->win[i]));
2206 }
2207 }
2208}
2209
2210
2211
2212
2213static void rs_update_rate_tbl(struct iwl_priv *priv,
2214 struct iwl_rxon_context *ctx,
2215 struct iwl_lq_sta *lq_sta,
2216 struct iwl_scale_tbl_info *tbl,
2217 int index, u8 is_green)
2218{
2219 u32 rate;
2220
2221
2222 rate = rate_n_flags_from_tbl(priv, tbl, index, is_green);
2223 rs_fill_link_cmd(priv, lq_sta, rate);
2224 iwl_send_lq_cmd(priv, ctx, &lq_sta->lq, CMD_ASYNC, false);
2225}
2226
2227
2228
2229
2230static void rs_rate_scale_perform(struct iwl_priv *priv,
2231 struct sk_buff *skb,
2232 struct ieee80211_sta *sta,
2233 struct iwl_lq_sta *lq_sta)
2234{
2235 struct ieee80211_hw *hw = priv->hw;
2236 struct ieee80211_conf *conf = &hw->conf;
2237 struct ieee80211_tx_info *info = IEEE80211_SKB_CB(skb);
2238 struct ieee80211_hdr *hdr = (struct ieee80211_hdr *)skb->data;
2239 int low = IWL_RATE_INVALID;
2240 int high = IWL_RATE_INVALID;
2241 int index;
2242 int i;
2243 struct iwl_rate_scale_data *window = NULL;
2244 int current_tpt = IWL_INVALID_VALUE;
2245 int low_tpt = IWL_INVALID_VALUE;
2246 int high_tpt = IWL_INVALID_VALUE;
2247 u32 fail_count;
2248 s8 scale_action = 0;
2249 u16 rate_mask;
2250 u8 update_lq = 0;
2251 struct iwl_scale_tbl_info *tbl, *tbl1;
2252 u16 rate_scale_index_msk = 0;
2253 u8 is_green = 0;
2254 u8 active_tbl = 0;
2255 u8 done_search = 0;
2256 u16 high_low;
2257 s32 sr;
2258 u8 tid = IWL_MAX_TID_COUNT;
2259 struct iwl_tid_data *tid_data;
2260 struct iwl_station_priv *sta_priv = (void *)sta->drv_priv;
2261 struct iwl_rxon_context *ctx = sta_priv->ctx;
2262
2263 IWL_DEBUG_RATE(priv, "rate scale calculate new rate for skb\n");
2264
2265
2266
2267 if (!ieee80211_is_data(hdr->frame_control) ||
2268 info->flags & IEEE80211_TX_CTL_NO_ACK)
2269 return;
2270
2271 lq_sta->supp_rates = sta->supp_rates[lq_sta->band];
2272
2273 tid = rs_tl_add_packet(lq_sta, hdr);
2274 if ((tid != IWL_MAX_TID_COUNT) &&
2275 (lq_sta->tx_agg_tid_en & (1 << tid))) {
2276 tid_data = &priv->tid_data[lq_sta->lq.sta_id][tid];
2277 if (tid_data->agg.state == IWL_AGG_OFF)
2278 lq_sta->is_agg = 0;
2279 else
2280 lq_sta->is_agg = 1;
2281 } else
2282 lq_sta->is_agg = 0;
2283
2284
2285
2286
2287
2288
2289 if (!lq_sta->search_better_tbl)
2290 active_tbl = lq_sta->active_tbl;
2291 else
2292 active_tbl = 1 - lq_sta->active_tbl;
2293
2294 tbl = &(lq_sta->lq_info[active_tbl]);
2295 if (is_legacy(tbl->lq_type))
2296 lq_sta->is_green = 0;
2297 else
2298 lq_sta->is_green = rs_use_green(sta);
2299 is_green = lq_sta->is_green;
2300
2301
2302 index = lq_sta->last_txrate_idx;
2303
2304 IWL_DEBUG_RATE(priv, "Rate scale index %d for type %d\n", index,
2305 tbl->lq_type);
2306
2307
2308 rate_mask = rs_get_supported_rates(lq_sta, hdr, tbl->lq_type);
2309
2310 IWL_DEBUG_RATE(priv, "mask 0x%04X\n", rate_mask);
2311
2312
2313 if (is_legacy(tbl->lq_type)) {
2314 if (lq_sta->band == IEEE80211_BAND_5GHZ)
2315
2316 rate_scale_index_msk = (u16) (rate_mask &
2317 (lq_sta->supp_rates << IWL_FIRST_OFDM_RATE));
2318 else
2319 rate_scale_index_msk = (u16) (rate_mask &
2320 lq_sta->supp_rates);
2321
2322 } else
2323 rate_scale_index_msk = rate_mask;
2324
2325 if (!rate_scale_index_msk)
2326 rate_scale_index_msk = rate_mask;
2327
2328 if (!((1 << index) & rate_scale_index_msk)) {
2329 IWL_ERR(priv, "Current Rate is not valid\n");
2330 if (lq_sta->search_better_tbl) {
2331
2332 tbl->lq_type = LQ_NONE;
2333 lq_sta->search_better_tbl = 0;
2334 tbl = &(lq_sta->lq_info[lq_sta->active_tbl]);
2335
2336 index = iwl_hwrate_to_plcp_idx(tbl->current_rate);
2337 rs_update_rate_tbl(priv, ctx, lq_sta, tbl,
2338 index, is_green);
2339 }
2340 return;
2341 }
2342
2343
2344 if (!tbl->expected_tpt) {
2345 IWL_ERR(priv, "tbl->expected_tpt is NULL\n");
2346 return;
2347 }
2348
2349
2350 if ((lq_sta->max_rate_idx != -1) &&
2351 (lq_sta->max_rate_idx < index)) {
2352 index = lq_sta->max_rate_idx;
2353 update_lq = 1;
2354 window = &(tbl->win[index]);
2355 goto lq_update;
2356 }
2357
2358 window = &(tbl->win[index]);
2359
2360
2361
2362
2363
2364
2365
2366
2367 fail_count = window->counter - window->success_counter;
2368 if ((fail_count < IWL_RATE_MIN_FAILURE_TH) &&
2369 (window->success_counter < IWL_RATE_MIN_SUCCESS_TH)) {
2370 IWL_DEBUG_RATE(priv, "LQ: still below TH. succ=%d total=%d "
2371 "for index %d\n",
2372 window->success_counter, window->counter, index);
2373
2374
2375 window->average_tpt = IWL_INVALID_VALUE;
2376
2377
2378
2379 rs_stay_in_table(lq_sta, false);
2380
2381 goto out;
2382 }
2383
2384
2385 if (window->average_tpt != ((window->success_ratio *
2386 tbl->expected_tpt[index] + 64) / 128)) {
2387 IWL_ERR(priv, "expected_tpt should have been calculated by now\n");
2388 window->average_tpt = ((window->success_ratio *
2389 tbl->expected_tpt[index] + 64) / 128);
2390 }
2391
2392
2393 if (lq_sta->search_better_tbl &&
2394 (iwl_tx_ant_restriction(priv) == IWL_ANT_OK_MULTI)) {
2395
2396
2397
2398 if (window->average_tpt > lq_sta->last_tpt) {
2399
2400 IWL_DEBUG_RATE(priv, "LQ: SWITCHING TO NEW TABLE "
2401 "suc=%d cur-tpt=%d old-tpt=%d\n",
2402 window->success_ratio,
2403 window->average_tpt,
2404 lq_sta->last_tpt);
2405
2406 if (!is_legacy(tbl->lq_type))
2407 lq_sta->enable_counter = 1;
2408
2409
2410 lq_sta->active_tbl = active_tbl;
2411 current_tpt = window->average_tpt;
2412
2413
2414 } else {
2415
2416 IWL_DEBUG_RATE(priv, "LQ: GOING BACK TO THE OLD TABLE "
2417 "suc=%d cur-tpt=%d old-tpt=%d\n",
2418 window->success_ratio,
2419 window->average_tpt,
2420 lq_sta->last_tpt);
2421
2422
2423 tbl->lq_type = LQ_NONE;
2424
2425
2426 active_tbl = lq_sta->active_tbl;
2427 tbl = &(lq_sta->lq_info[active_tbl]);
2428
2429
2430 index = iwl_hwrate_to_plcp_idx(tbl->current_rate);
2431 current_tpt = lq_sta->last_tpt;
2432
2433
2434 update_lq = 1;
2435 }
2436
2437
2438
2439 lq_sta->search_better_tbl = 0;
2440 done_search = 1;
2441 goto lq_update;
2442 }
2443
2444
2445
2446 high_low = rs_get_adjacent_rate(priv, index, rate_scale_index_msk,
2447 tbl->lq_type);
2448 low = high_low & 0xff;
2449 high = (high_low >> 8) & 0xff;
2450
2451
2452 if ((lq_sta->max_rate_idx != -1) &&
2453 (lq_sta->max_rate_idx < high))
2454 high = IWL_RATE_INVALID;
2455
2456 sr = window->success_ratio;
2457
2458
2459 current_tpt = window->average_tpt;
2460 if (low != IWL_RATE_INVALID)
2461 low_tpt = tbl->win[low].average_tpt;
2462 if (high != IWL_RATE_INVALID)
2463 high_tpt = tbl->win[high].average_tpt;
2464
2465 scale_action = 0;
2466
2467
2468 if ((sr <= IWL_RATE_DECREASE_TH) || (current_tpt == 0)) {
2469 IWL_DEBUG_RATE(priv, "decrease rate because of low success_ratio\n");
2470 scale_action = -1;
2471
2472
2473 } else if ((low_tpt == IWL_INVALID_VALUE) &&
2474 (high_tpt == IWL_INVALID_VALUE)) {
2475
2476 if (high != IWL_RATE_INVALID && sr >= IWL_RATE_INCREASE_TH)
2477 scale_action = 1;
2478 else if (low != IWL_RATE_INVALID)
2479 scale_action = 0;
2480 }
2481
2482
2483
2484 else if ((low_tpt != IWL_INVALID_VALUE) &&
2485 (high_tpt != IWL_INVALID_VALUE) &&
2486 (low_tpt < current_tpt) &&
2487 (high_tpt < current_tpt))
2488 scale_action = 0;
2489
2490
2491
2492 else {
2493
2494 if (high_tpt != IWL_INVALID_VALUE) {
2495
2496 if (high_tpt > current_tpt &&
2497 sr >= IWL_RATE_INCREASE_TH) {
2498 scale_action = 1;
2499 } else {
2500 scale_action = 0;
2501 }
2502
2503
2504 } else if (low_tpt != IWL_INVALID_VALUE) {
2505
2506 if (low_tpt > current_tpt) {
2507 IWL_DEBUG_RATE(priv,
2508 "decrease rate because of low tpt\n");
2509 scale_action = -1;
2510 } else if (sr >= IWL_RATE_INCREASE_TH) {
2511 scale_action = 1;
2512 }
2513 }
2514 }
2515
2516
2517
2518 if ((scale_action == -1) && (low != IWL_RATE_INVALID) &&
2519 ((sr > IWL_RATE_HIGH_TH) ||
2520 (current_tpt > (100 * tbl->expected_tpt[low]))))
2521 scale_action = 0;
2522 if (!iwl_ht_enabled(priv) && !is_legacy(tbl->lq_type))
2523 scale_action = -1;
2524 if (iwl_tx_ant_restriction(priv) != IWL_ANT_OK_MULTI &&
2525 (is_mimo2(tbl->lq_type) || is_mimo3(tbl->lq_type)))
2526 scale_action = -1;
2527
2528 if ((priv->bt_traffic_load >= IWL_BT_COEX_TRAFFIC_LOAD_HIGH) &&
2529 (is_mimo2(tbl->lq_type) || is_mimo3(tbl->lq_type))) {
2530 if (lq_sta->last_bt_traffic > priv->bt_traffic_load) {
2531
2532
2533
2534
2535
2536 } else if (lq_sta->last_bt_traffic <= priv->bt_traffic_load) {
2537 scale_action = -1;
2538 }
2539 }
2540 lq_sta->last_bt_traffic = priv->bt_traffic_load;
2541
2542 if ((priv->bt_traffic_load >= IWL_BT_COEX_TRAFFIC_LOAD_HIGH) &&
2543 (is_mimo2(tbl->lq_type) || is_mimo3(tbl->lq_type))) {
2544
2545 rs_stay_in_table(lq_sta, true);
2546 goto lq_update;
2547 }
2548
2549 switch (scale_action) {
2550 case -1:
2551
2552 if (low != IWL_RATE_INVALID) {
2553 update_lq = 1;
2554 index = low;
2555 }
2556
2557 break;
2558 case 1:
2559
2560 if (high != IWL_RATE_INVALID) {
2561 update_lq = 1;
2562 index = high;
2563 }
2564
2565 break;
2566 case 0:
2567
2568 default:
2569 break;
2570 }
2571
2572 IWL_DEBUG_RATE(priv, "choose rate scale index %d action %d low %d "
2573 "high %d type %d\n",
2574 index, scale_action, low, high, tbl->lq_type);
2575
2576lq_update:
2577
2578 if (update_lq)
2579 rs_update_rate_tbl(priv, ctx, lq_sta, tbl, index, is_green);
2580
2581 if (iwl_tx_ant_restriction(priv) == IWL_ANT_OK_MULTI) {
2582
2583
2584 rs_stay_in_table(lq_sta, false);
2585 }
2586
2587
2588
2589
2590
2591
2592 if (!update_lq && !done_search && !lq_sta->stay_in_tbl && window->counter) {
2593
2594 lq_sta->last_tpt = current_tpt;
2595
2596
2597
2598 if (is_legacy(tbl->lq_type))
2599 rs_move_legacy_other(priv, lq_sta, conf, sta, index);
2600 else if (is_siso(tbl->lq_type))
2601 rs_move_siso_to_other(priv, lq_sta, conf, sta, index);
2602 else if (is_mimo2(tbl->lq_type))
2603 rs_move_mimo2_to_other(priv, lq_sta, conf, sta, index);
2604 else
2605 rs_move_mimo3_to_other(priv, lq_sta, conf, sta, index);
2606
2607
2608 if (lq_sta->search_better_tbl) {
2609
2610 tbl = &(lq_sta->lq_info[(1 - lq_sta->active_tbl)]);
2611 for (i = 0; i < IWL_RATE_COUNT; i++)
2612 rs_rate_scale_clear_window(&(tbl->win[i]));
2613
2614
2615 index = iwl_hwrate_to_plcp_idx(tbl->current_rate);
2616
2617 IWL_DEBUG_RATE(priv, "Switch current mcs: %X index: %d\n",
2618 tbl->current_rate, index);
2619 rs_fill_link_cmd(priv, lq_sta, tbl->current_rate);
2620 iwl_send_lq_cmd(priv, ctx, &lq_sta->lq, CMD_ASYNC, false);
2621 } else
2622 done_search = 1;
2623 }
2624
2625 if (done_search && !lq_sta->stay_in_tbl) {
2626
2627
2628
2629
2630
2631 tbl1 = &(lq_sta->lq_info[lq_sta->active_tbl]);
2632 if (is_legacy(tbl1->lq_type) && !conf_is_ht(conf) &&
2633 lq_sta->action_counter > tbl1->max_search) {
2634 IWL_DEBUG_RATE(priv, "LQ: STAY in legacy table\n");
2635 rs_set_stay_in_table(priv, 1, lq_sta);
2636 }
2637
2638
2639
2640
2641 if (lq_sta->enable_counter &&
2642 (lq_sta->action_counter >= tbl1->max_search) &&
2643 iwl_ht_enabled(priv)) {
2644 if ((lq_sta->last_tpt > IWL_AGG_TPT_THREHOLD) &&
2645 (lq_sta->tx_agg_tid_en & (1 << tid)) &&
2646 (tid != IWL_MAX_TID_COUNT)) {
2647 u8 sta_id = lq_sta->lq.sta_id;
2648 tid_data = &priv->tid_data[sta_id][tid];
2649 if (tid_data->agg.state == IWL_AGG_OFF) {
2650 IWL_DEBUG_RATE(priv,
2651 "try to aggregate tid %d\n",
2652 tid);
2653 rs_tl_turn_on_agg(priv, tid,
2654 lq_sta, sta);
2655 }
2656 }
2657 rs_set_stay_in_table(priv, 0, lq_sta);
2658 }
2659 }
2660
2661out:
2662 tbl->current_rate = rate_n_flags_from_tbl(priv, tbl, index, is_green);
2663 lq_sta->last_txrate_idx = index;
2664}
2665
2666
2667
2668
2669
2670
2671
2672
2673
2674
2675
2676
2677
2678
2679
2680static void rs_initialize_lq(struct iwl_priv *priv,
2681 struct ieee80211_sta *sta,
2682 struct iwl_lq_sta *lq_sta)
2683{
2684 struct iwl_scale_tbl_info *tbl;
2685 int rate_idx;
2686 int i;
2687 u32 rate;
2688 u8 use_green = rs_use_green(sta);
2689 u8 active_tbl = 0;
2690 u8 valid_tx_ant;
2691 struct iwl_station_priv *sta_priv;
2692 struct iwl_rxon_context *ctx;
2693
2694 if (!sta || !lq_sta)
2695 return;
2696
2697 sta_priv = (void *)sta->drv_priv;
2698 ctx = sta_priv->ctx;
2699
2700 i = lq_sta->last_txrate_idx;
2701
2702 valid_tx_ant = priv->nvm_data->valid_tx_ant;
2703
2704 if (!lq_sta->search_better_tbl)
2705 active_tbl = lq_sta->active_tbl;
2706 else
2707 active_tbl = 1 - lq_sta->active_tbl;
2708
2709 tbl = &(lq_sta->lq_info[active_tbl]);
2710
2711 if ((i < 0) || (i >= IWL_RATE_COUNT))
2712 i = 0;
2713
2714 rate = iwl_rates[i].plcp;
2715 tbl->ant_type = first_antenna(valid_tx_ant);
2716 rate |= tbl->ant_type << RATE_MCS_ANT_POS;
2717
2718 if (i >= IWL_FIRST_CCK_RATE && i <= IWL_LAST_CCK_RATE)
2719 rate |= RATE_MCS_CCK_MSK;
2720
2721 rs_get_tbl_info_from_mcs(rate, priv->band, tbl, &rate_idx);
2722 if (!rs_is_valid_ant(valid_tx_ant, tbl->ant_type))
2723 rs_toggle_antenna(valid_tx_ant, &rate, tbl);
2724
2725 rate = rate_n_flags_from_tbl(priv, tbl, rate_idx, use_green);
2726 tbl->current_rate = rate;
2727 rs_set_expected_tpt_table(lq_sta, tbl);
2728 rs_fill_link_cmd(NULL, lq_sta, rate);
2729 priv->stations[lq_sta->lq.sta_id].lq = &lq_sta->lq;
2730 iwl_send_lq_cmd(priv, ctx, &lq_sta->lq, CMD_SYNC, true);
2731}
2732
2733static void rs_get_rate(void *priv_r, struct ieee80211_sta *sta, void *priv_sta,
2734 struct ieee80211_tx_rate_control *txrc)
2735{
2736
2737 struct sk_buff *skb = txrc->skb;
2738 struct ieee80211_supported_band *sband = txrc->sband;
2739 struct iwl_op_mode *op_mode __maybe_unused =
2740 (struct iwl_op_mode *)priv_r;
2741 struct iwl_priv *priv __maybe_unused = IWL_OP_MODE_GET_DVM(op_mode);
2742 struct ieee80211_tx_info *info = IEEE80211_SKB_CB(skb);
2743 struct iwl_lq_sta *lq_sta = priv_sta;
2744 int rate_idx;
2745
2746 IWL_DEBUG_RATE_LIMIT(priv, "rate scale calculate new rate for skb\n");
2747
2748
2749 if (lq_sta) {
2750 lq_sta->max_rate_idx = txrc->max_rate_idx;
2751 if ((sband->band == IEEE80211_BAND_5GHZ) &&
2752 (lq_sta->max_rate_idx != -1))
2753 lq_sta->max_rate_idx += IWL_FIRST_OFDM_RATE;
2754 if ((lq_sta->max_rate_idx < 0) ||
2755 (lq_sta->max_rate_idx >= IWL_RATE_COUNT))
2756 lq_sta->max_rate_idx = -1;
2757 }
2758
2759
2760 if (lq_sta && !lq_sta->drv) {
2761 IWL_DEBUG_RATE(priv, "Rate scaling not initialized yet.\n");
2762 priv_sta = NULL;
2763 }
2764
2765
2766 if (rate_control_send_low(sta, priv_sta, txrc))
2767 return;
2768
2769 rate_idx = lq_sta->last_txrate_idx;
2770
2771 if (lq_sta->last_rate_n_flags & RATE_MCS_HT_MSK) {
2772 rate_idx -= IWL_FIRST_OFDM_RATE;
2773
2774 rate_idx = (rate_idx > 0) ? (rate_idx - 1) : 0;
2775 if (rs_extract_rate(lq_sta->last_rate_n_flags) >=
2776 IWL_RATE_MIMO3_6M_PLCP)
2777 rate_idx = rate_idx + (2 * MCS_INDEX_PER_STREAM);
2778 else if (rs_extract_rate(lq_sta->last_rate_n_flags) >=
2779 IWL_RATE_MIMO2_6M_PLCP)
2780 rate_idx = rate_idx + MCS_INDEX_PER_STREAM;
2781 info->control.rates[0].flags = IEEE80211_TX_RC_MCS;
2782 if (lq_sta->last_rate_n_flags & RATE_MCS_SGI_MSK)
2783 info->control.rates[0].flags |= IEEE80211_TX_RC_SHORT_GI;
2784 if (lq_sta->last_rate_n_flags & RATE_MCS_DUP_MSK)
2785 info->control.rates[0].flags |= IEEE80211_TX_RC_DUP_DATA;
2786 if (lq_sta->last_rate_n_flags & RATE_MCS_HT40_MSK)
2787 info->control.rates[0].flags |= IEEE80211_TX_RC_40_MHZ_WIDTH;
2788 if (lq_sta->last_rate_n_flags & RATE_MCS_GF_MSK)
2789 info->control.rates[0].flags |= IEEE80211_TX_RC_GREEN_FIELD;
2790 } else {
2791
2792 if ((rate_idx < 0) || (rate_idx >= IWL_RATE_COUNT_LEGACY) ||
2793 ((sband->band == IEEE80211_BAND_5GHZ) &&
2794 (rate_idx < IWL_FIRST_OFDM_RATE)))
2795 rate_idx = rate_lowest_index(sband, sta);
2796
2797 else if (sband->band == IEEE80211_BAND_5GHZ)
2798 rate_idx -= IWL_FIRST_OFDM_RATE;
2799 info->control.rates[0].flags = 0;
2800 }
2801 info->control.rates[0].idx = rate_idx;
2802
2803}
2804
2805static void *rs_alloc_sta(void *priv_rate, struct ieee80211_sta *sta,
2806 gfp_t gfp)
2807{
2808 struct iwl_station_priv *sta_priv = (struct iwl_station_priv *) sta->drv_priv;
2809 struct iwl_op_mode *op_mode __maybe_unused =
2810 (struct iwl_op_mode *)priv_rate;
2811 struct iwl_priv *priv __maybe_unused = IWL_OP_MODE_GET_DVM(op_mode);
2812
2813 IWL_DEBUG_RATE(priv, "create station rate scale window\n");
2814
2815 return &sta_priv->lq_sta;
2816}
2817
2818
2819
2820
2821void iwl_rs_rate_init(struct iwl_priv *priv, struct ieee80211_sta *sta, u8 sta_id)
2822{
2823 int i, j;
2824 struct ieee80211_hw *hw = priv->hw;
2825 struct ieee80211_conf *conf = &priv->hw->conf;
2826 struct ieee80211_sta_ht_cap *ht_cap = &sta->ht_cap;
2827 struct iwl_station_priv *sta_priv;
2828 struct iwl_lq_sta *lq_sta;
2829 struct ieee80211_supported_band *sband;
2830 unsigned long supp;
2831
2832 sta_priv = (struct iwl_station_priv *) sta->drv_priv;
2833 lq_sta = &sta_priv->lq_sta;
2834 sband = hw->wiphy->bands[conf->channel->band];
2835
2836
2837 lq_sta->lq.sta_id = sta_id;
2838
2839 for (j = 0; j < LQ_SIZE; j++)
2840 for (i = 0; i < IWL_RATE_COUNT; i++)
2841 rs_rate_scale_clear_window(&lq_sta->lq_info[j].win[i]);
2842
2843 lq_sta->flush_timer = 0;
2844 lq_sta->supp_rates = sta->supp_rates[sband->band];
2845 for (j = 0; j < LQ_SIZE; j++)
2846 for (i = 0; i < IWL_RATE_COUNT; i++)
2847 rs_rate_scale_clear_window(&lq_sta->lq_info[j].win[i]);
2848
2849 IWL_DEBUG_RATE(priv, "LQ: *** rate scale station global init for station %d ***\n",
2850 sta_id);
2851
2852
2853
2854
2855
2856 lq_sta->is_dup = 0;
2857 lq_sta->max_rate_idx = -1;
2858 lq_sta->missed_rate_counter = IWL_MISSED_RATE_MAX;
2859 lq_sta->is_green = rs_use_green(sta);
2860 lq_sta->band = sband->band;
2861
2862
2863
2864 supp = sta->supp_rates[sband->band];
2865 lq_sta->active_legacy_rate = 0;
2866 for_each_set_bit(i, &supp, BITS_PER_LONG)
2867 lq_sta->active_legacy_rate |= BIT(sband->bitrates[i].hw_value);
2868
2869
2870
2871
2872
2873 lq_sta->active_siso_rate = ht_cap->mcs.rx_mask[0] << 1;
2874 lq_sta->active_siso_rate |= ht_cap->mcs.rx_mask[0] & 0x1;
2875 lq_sta->active_siso_rate &= ~((u16)0x2);
2876 lq_sta->active_siso_rate <<= IWL_FIRST_OFDM_RATE;
2877
2878
2879 lq_sta->active_mimo2_rate = ht_cap->mcs.rx_mask[1] << 1;
2880 lq_sta->active_mimo2_rate |= ht_cap->mcs.rx_mask[1] & 0x1;
2881 lq_sta->active_mimo2_rate &= ~((u16)0x2);
2882 lq_sta->active_mimo2_rate <<= IWL_FIRST_OFDM_RATE;
2883
2884 lq_sta->active_mimo3_rate = ht_cap->mcs.rx_mask[2] << 1;
2885 lq_sta->active_mimo3_rate |= ht_cap->mcs.rx_mask[2] & 0x1;
2886 lq_sta->active_mimo3_rate &= ~((u16)0x2);
2887 lq_sta->active_mimo3_rate <<= IWL_FIRST_OFDM_RATE;
2888
2889 IWL_DEBUG_RATE(priv, "SISO-RATE=%X MIMO2-RATE=%X MIMO3-RATE=%X\n",
2890 lq_sta->active_siso_rate,
2891 lq_sta->active_mimo2_rate,
2892 lq_sta->active_mimo3_rate);
2893
2894
2895 lq_sta->lq.general_params.single_stream_ant_msk =
2896 first_antenna(priv->nvm_data->valid_tx_ant);
2897 lq_sta->lq.general_params.dual_stream_ant_msk =
2898 priv->nvm_data->valid_tx_ant &
2899 ~first_antenna(priv->nvm_data->valid_tx_ant);
2900 if (!lq_sta->lq.general_params.dual_stream_ant_msk) {
2901 lq_sta->lq.general_params.dual_stream_ant_msk = ANT_AB;
2902 } else if (num_of_ant(priv->nvm_data->valid_tx_ant) == 2) {
2903 lq_sta->lq.general_params.dual_stream_ant_msk =
2904 priv->nvm_data->valid_tx_ant;
2905 }
2906
2907
2908 lq_sta->tx_agg_tid_en = IWL_AGG_ALL_TID;
2909 lq_sta->drv = priv;
2910
2911
2912 lq_sta->last_txrate_idx = rate_lowest_index(sband, sta);
2913 if (sband->band == IEEE80211_BAND_5GHZ)
2914 lq_sta->last_txrate_idx += IWL_FIRST_OFDM_RATE;
2915 lq_sta->is_agg = 0;
2916#ifdef CONFIG_IWLWIFI_DEVICE_TESTMODE
2917 priv->tm_fixed_rate = 0;
2918#endif
2919#ifdef CONFIG_MAC80211_DEBUGFS
2920 lq_sta->dbg_fixed_rate = 0;
2921#endif
2922
2923 rs_initialize_lq(priv, sta, lq_sta);
2924}
2925
2926static void rs_fill_link_cmd(struct iwl_priv *priv,
2927 struct iwl_lq_sta *lq_sta, u32 new_rate)
2928{
2929 struct iwl_scale_tbl_info tbl_type;
2930 int index = 0;
2931 int rate_idx;
2932 int repeat_rate = 0;
2933 u8 ant_toggle_cnt = 0;
2934 u8 use_ht_possible = 1;
2935 u8 valid_tx_ant = 0;
2936 struct iwl_station_priv *sta_priv =
2937 container_of(lq_sta, struct iwl_station_priv, lq_sta);
2938 struct iwl_link_quality_cmd *lq_cmd = &lq_sta->lq;
2939
2940
2941 rs_dbgfs_set_mcs(lq_sta, &new_rate, index);
2942
2943
2944 rs_get_tbl_info_from_mcs(new_rate, lq_sta->band,
2945 &tbl_type, &rate_idx);
2946
2947 if (priv && priv->bt_full_concurrent) {
2948
2949 tbl_type.ant_type =
2950 first_antenna(priv->nvm_data->valid_tx_ant);
2951 }
2952
2953
2954 if (is_legacy(tbl_type.lq_type)) {
2955 ant_toggle_cnt = 1;
2956 repeat_rate = IWL_NUMBER_TRY;
2957 } else {
2958 repeat_rate = min(IWL_HT_NUMBER_TRY,
2959 LINK_QUAL_AGG_DISABLE_START_DEF - 1);
2960 }
2961
2962 lq_cmd->general_params.mimo_delimiter =
2963 is_mimo(tbl_type.lq_type) ? 1 : 0;
2964
2965
2966 lq_cmd->rs_table[index].rate_n_flags = cpu_to_le32(new_rate);
2967
2968 if (num_of_ant(tbl_type.ant_type) == 1) {
2969 lq_cmd->general_params.single_stream_ant_msk =
2970 tbl_type.ant_type;
2971 } else if (num_of_ant(tbl_type.ant_type) == 2) {
2972 lq_cmd->general_params.dual_stream_ant_msk =
2973 tbl_type.ant_type;
2974 }
2975
2976 index++;
2977 repeat_rate--;
2978 if (priv) {
2979 if (priv->bt_full_concurrent)
2980 valid_tx_ant = ANT_A;
2981 else
2982 valid_tx_ant = priv->nvm_data->valid_tx_ant;
2983 }
2984
2985
2986 while (index < LINK_QUAL_MAX_RETRY_NUM) {
2987
2988
2989
2990 while (repeat_rate > 0 && (index < LINK_QUAL_MAX_RETRY_NUM)) {
2991 if (is_legacy(tbl_type.lq_type)) {
2992 if (ant_toggle_cnt < NUM_TRY_BEFORE_ANT_TOGGLE)
2993 ant_toggle_cnt++;
2994 else if (priv &&
2995 rs_toggle_antenna(valid_tx_ant,
2996 &new_rate, &tbl_type))
2997 ant_toggle_cnt = 1;
2998 }
2999
3000
3001 rs_dbgfs_set_mcs(lq_sta, &new_rate, index);
3002
3003
3004 lq_cmd->rs_table[index].rate_n_flags =
3005 cpu_to_le32(new_rate);
3006 repeat_rate--;
3007 index++;
3008 }
3009
3010 rs_get_tbl_info_from_mcs(new_rate, lq_sta->band, &tbl_type,
3011 &rate_idx);
3012
3013 if (priv && priv->bt_full_concurrent) {
3014
3015 tbl_type.ant_type =
3016 first_antenna(priv->nvm_data->valid_tx_ant);
3017 }
3018
3019
3020
3021
3022 if (is_mimo(tbl_type.lq_type))
3023 lq_cmd->general_params.mimo_delimiter = index;
3024
3025
3026 new_rate = rs_get_lower_rate(lq_sta, &tbl_type, rate_idx,
3027 use_ht_possible);
3028
3029
3030 if (is_legacy(tbl_type.lq_type)) {
3031 if (ant_toggle_cnt < NUM_TRY_BEFORE_ANT_TOGGLE)
3032 ant_toggle_cnt++;
3033 else if (priv &&
3034 rs_toggle_antenna(valid_tx_ant,
3035 &new_rate, &tbl_type))
3036 ant_toggle_cnt = 1;
3037
3038 repeat_rate = IWL_NUMBER_TRY;
3039 } else {
3040 repeat_rate = IWL_HT_NUMBER_TRY;
3041 }
3042
3043
3044
3045 use_ht_possible = 0;
3046
3047
3048 rs_dbgfs_set_mcs(lq_sta, &new_rate, index);
3049
3050
3051 lq_cmd->rs_table[index].rate_n_flags = cpu_to_le32(new_rate);
3052
3053 index++;
3054 repeat_rate--;
3055 }
3056
3057 lq_cmd->agg_params.agg_frame_cnt_limit =
3058 sta_priv->max_agg_bufsize ?: LINK_QUAL_AGG_FRAME_LIMIT_DEF;
3059 lq_cmd->agg_params.agg_dis_start_th = LINK_QUAL_AGG_DISABLE_START_DEF;
3060
3061 lq_cmd->agg_params.agg_time_limit =
3062 cpu_to_le16(LINK_QUAL_AGG_TIME_LIMIT_DEF);
3063
3064
3065
3066
3067 if (priv && priv->cfg->bt_params &&
3068 priv->cfg->bt_params->agg_time_limit &&
3069 priv->bt_traffic_load >= IWL_BT_COEX_TRAFFIC_LOAD_HIGH)
3070 lq_cmd->agg_params.agg_time_limit =
3071 cpu_to_le16(priv->cfg->bt_params->agg_time_limit);
3072}
3073
3074static void *rs_alloc(struct ieee80211_hw *hw, struct dentry *debugfsdir)
3075{
3076 return hw->priv;
3077}
3078
3079static void rs_free(void *priv_rate)
3080{
3081 return;
3082}
3083
3084static void rs_free_sta(void *priv_r, struct ieee80211_sta *sta,
3085 void *priv_sta)
3086{
3087 struct iwl_op_mode *op_mode __maybe_unused = priv_r;
3088 struct iwl_priv *priv __maybe_unused = IWL_OP_MODE_GET_DVM(op_mode);
3089
3090 IWL_DEBUG_RATE(priv, "enter\n");
3091 IWL_DEBUG_RATE(priv, "leave\n");
3092}
3093
3094#ifdef CONFIG_MAC80211_DEBUGFS
3095static void rs_dbgfs_set_mcs(struct iwl_lq_sta *lq_sta,
3096 u32 *rate_n_flags, int index)
3097{
3098 struct iwl_priv *priv;
3099 u8 valid_tx_ant;
3100 u8 ant_sel_tx;
3101
3102 priv = lq_sta->drv;
3103 valid_tx_ant = priv->nvm_data->valid_tx_ant;
3104 if (lq_sta->dbg_fixed_rate) {
3105 ant_sel_tx =
3106 ((lq_sta->dbg_fixed_rate & RATE_MCS_ANT_ABC_MSK)
3107 >> RATE_MCS_ANT_POS);
3108 if ((valid_tx_ant & ant_sel_tx) == ant_sel_tx) {
3109 *rate_n_flags = lq_sta->dbg_fixed_rate;
3110 IWL_DEBUG_RATE(priv, "Fixed rate ON\n");
3111 } else {
3112 lq_sta->dbg_fixed_rate = 0;
3113 IWL_ERR(priv,
3114 "Invalid antenna selection 0x%X, Valid is 0x%X\n",
3115 ant_sel_tx, valid_tx_ant);
3116 IWL_DEBUG_RATE(priv, "Fixed rate OFF\n");
3117 }
3118 } else {
3119 IWL_DEBUG_RATE(priv, "Fixed rate OFF\n");
3120 }
3121}
3122
3123static ssize_t rs_sta_dbgfs_scale_table_write(struct file *file,
3124 const char __user *user_buf, size_t count, loff_t *ppos)
3125{
3126 struct iwl_lq_sta *lq_sta = file->private_data;
3127 struct iwl_priv *priv;
3128 char buf[64];
3129 size_t buf_size;
3130 u32 parsed_rate;
3131
3132
3133 priv = lq_sta->drv;
3134 memset(buf, 0, sizeof(buf));
3135 buf_size = min(count, sizeof(buf) - 1);
3136 if (copy_from_user(buf, user_buf, buf_size))
3137 return -EFAULT;
3138
3139 if (sscanf(buf, "%x", &parsed_rate) == 1)
3140 lq_sta->dbg_fixed_rate = parsed_rate;
3141 else
3142 lq_sta->dbg_fixed_rate = 0;
3143
3144 rs_program_fix_rate(priv, lq_sta);
3145
3146 return count;
3147}
3148
3149static ssize_t rs_sta_dbgfs_scale_table_read(struct file *file,
3150 char __user *user_buf, size_t count, loff_t *ppos)
3151{
3152 char *buff;
3153 int desc = 0;
3154 int i = 0;
3155 int index = 0;
3156 ssize_t ret;
3157
3158 struct iwl_lq_sta *lq_sta = file->private_data;
3159 struct iwl_priv *priv;
3160 struct iwl_scale_tbl_info *tbl = &(lq_sta->lq_info[lq_sta->active_tbl]);
3161
3162 priv = lq_sta->drv;
3163 buff = kmalloc(1024, GFP_KERNEL);
3164 if (!buff)
3165 return -ENOMEM;
3166
3167 desc += sprintf(buff+desc, "sta_id %d\n", lq_sta->lq.sta_id);
3168 desc += sprintf(buff+desc, "failed=%d success=%d rate=0%X\n",
3169 lq_sta->total_failed, lq_sta->total_success,
3170 lq_sta->active_legacy_rate);
3171 desc += sprintf(buff+desc, "fixed rate 0x%X\n",
3172 lq_sta->dbg_fixed_rate);
3173 desc += sprintf(buff+desc, "valid_tx_ant %s%s%s\n",
3174 (priv->nvm_data->valid_tx_ant & ANT_A) ? "ANT_A," : "",
3175 (priv->nvm_data->valid_tx_ant & ANT_B) ? "ANT_B," : "",
3176 (priv->nvm_data->valid_tx_ant & ANT_C) ? "ANT_C" : "");
3177 desc += sprintf(buff+desc, "lq type %s\n",
3178 (is_legacy(tbl->lq_type)) ? "legacy" : "HT");
3179 if (is_Ht(tbl->lq_type)) {
3180 desc += sprintf(buff+desc, " %s",
3181 (is_siso(tbl->lq_type)) ? "SISO" :
3182 ((is_mimo2(tbl->lq_type)) ? "MIMO2" : "MIMO3"));
3183 desc += sprintf(buff+desc, " %s",
3184 (tbl->is_ht40) ? "40MHz" : "20MHz");
3185 desc += sprintf(buff+desc, " %s %s %s\n", (tbl->is_SGI) ? "SGI" : "",
3186 (lq_sta->is_green) ? "GF enabled" : "",
3187 (lq_sta->is_agg) ? "AGG on" : "");
3188 }
3189 desc += sprintf(buff+desc, "last tx rate=0x%X\n",
3190 lq_sta->last_rate_n_flags);
3191 desc += sprintf(buff+desc, "general:"
3192 "flags=0x%X mimo-d=%d s-ant0x%x d-ant=0x%x\n",
3193 lq_sta->lq.general_params.flags,
3194 lq_sta->lq.general_params.mimo_delimiter,
3195 lq_sta->lq.general_params.single_stream_ant_msk,
3196 lq_sta->lq.general_params.dual_stream_ant_msk);
3197
3198 desc += sprintf(buff+desc, "agg:"
3199 "time_limit=%d dist_start_th=%d frame_cnt_limit=%d\n",
3200 le16_to_cpu(lq_sta->lq.agg_params.agg_time_limit),
3201 lq_sta->lq.agg_params.agg_dis_start_th,
3202 lq_sta->lq.agg_params.agg_frame_cnt_limit);
3203
3204 desc += sprintf(buff+desc,
3205 "Start idx [0]=0x%x [1]=0x%x [2]=0x%x [3]=0x%x\n",
3206 lq_sta->lq.general_params.start_rate_index[0],
3207 lq_sta->lq.general_params.start_rate_index[1],
3208 lq_sta->lq.general_params.start_rate_index[2],
3209 lq_sta->lq.general_params.start_rate_index[3]);
3210
3211 for (i = 0; i < LINK_QUAL_MAX_RETRY_NUM; i++) {
3212 index = iwl_hwrate_to_plcp_idx(
3213 le32_to_cpu(lq_sta->lq.rs_table[i].rate_n_flags));
3214 if (is_legacy(tbl->lq_type)) {
3215 desc += sprintf(buff+desc, " rate[%d] 0x%X %smbps\n",
3216 i, le32_to_cpu(lq_sta->lq.rs_table[i].rate_n_flags),
3217 iwl_rate_mcs[index].mbps);
3218 } else {
3219 desc += sprintf(buff+desc, " rate[%d] 0x%X %smbps (%s)\n",
3220 i, le32_to_cpu(lq_sta->lq.rs_table[i].rate_n_flags),
3221 iwl_rate_mcs[index].mbps, iwl_rate_mcs[index].mcs);
3222 }
3223 }
3224
3225 ret = simple_read_from_buffer(user_buf, count, ppos, buff, desc);
3226 kfree(buff);
3227 return ret;
3228}
3229
3230static const struct file_operations rs_sta_dbgfs_scale_table_ops = {
3231 .write = rs_sta_dbgfs_scale_table_write,
3232 .read = rs_sta_dbgfs_scale_table_read,
3233 .open = simple_open,
3234 .llseek = default_llseek,
3235};
3236static ssize_t rs_sta_dbgfs_stats_table_read(struct file *file,
3237 char __user *user_buf, size_t count, loff_t *ppos)
3238{
3239 char *buff;
3240 int desc = 0;
3241 int i, j;
3242 ssize_t ret;
3243
3244 struct iwl_lq_sta *lq_sta = file->private_data;
3245
3246 buff = kmalloc(1024, GFP_KERNEL);
3247 if (!buff)
3248 return -ENOMEM;
3249
3250 for (i = 0; i < LQ_SIZE; i++) {
3251 desc += sprintf(buff+desc,
3252 "%s type=%d SGI=%d HT40=%d DUP=%d GF=%d\n"
3253 "rate=0x%X\n",
3254 lq_sta->active_tbl == i ? "*" : "x",
3255 lq_sta->lq_info[i].lq_type,
3256 lq_sta->lq_info[i].is_SGI,
3257 lq_sta->lq_info[i].is_ht40,
3258 lq_sta->lq_info[i].is_dup,
3259 lq_sta->is_green,
3260 lq_sta->lq_info[i].current_rate);
3261 for (j = 0; j < IWL_RATE_COUNT; j++) {
3262 desc += sprintf(buff+desc,
3263 "counter=%d success=%d %%=%d\n",
3264 lq_sta->lq_info[i].win[j].counter,
3265 lq_sta->lq_info[i].win[j].success_counter,
3266 lq_sta->lq_info[i].win[j].success_ratio);
3267 }
3268 }
3269 ret = simple_read_from_buffer(user_buf, count, ppos, buff, desc);
3270 kfree(buff);
3271 return ret;
3272}
3273
3274static const struct file_operations rs_sta_dbgfs_stats_table_ops = {
3275 .read = rs_sta_dbgfs_stats_table_read,
3276 .open = simple_open,
3277 .llseek = default_llseek,
3278};
3279
3280static ssize_t rs_sta_dbgfs_rate_scale_data_read(struct file *file,
3281 char __user *user_buf, size_t count, loff_t *ppos)
3282{
3283 struct iwl_lq_sta *lq_sta = file->private_data;
3284 struct iwl_scale_tbl_info *tbl = &lq_sta->lq_info[lq_sta->active_tbl];
3285 char buff[120];
3286 int desc = 0;
3287
3288 if (is_Ht(tbl->lq_type))
3289 desc += sprintf(buff+desc,
3290 "Bit Rate= %d Mb/s\n",
3291 tbl->expected_tpt[lq_sta->last_txrate_idx]);
3292 else
3293 desc += sprintf(buff+desc,
3294 "Bit Rate= %d Mb/s\n",
3295 iwl_rates[lq_sta->last_txrate_idx].ieee >> 1);
3296
3297 return simple_read_from_buffer(user_buf, count, ppos, buff, desc);
3298}
3299
3300static const struct file_operations rs_sta_dbgfs_rate_scale_data_ops = {
3301 .read = rs_sta_dbgfs_rate_scale_data_read,
3302 .open = simple_open,
3303 .llseek = default_llseek,
3304};
3305
3306static void rs_add_debugfs(void *priv, void *priv_sta,
3307 struct dentry *dir)
3308{
3309 struct iwl_lq_sta *lq_sta = priv_sta;
3310 lq_sta->rs_sta_dbgfs_scale_table_file =
3311 debugfs_create_file("rate_scale_table", S_IRUSR | S_IWUSR, dir,
3312 lq_sta, &rs_sta_dbgfs_scale_table_ops);
3313 lq_sta->rs_sta_dbgfs_stats_table_file =
3314 debugfs_create_file("rate_stats_table", S_IRUSR, dir,
3315 lq_sta, &rs_sta_dbgfs_stats_table_ops);
3316 lq_sta->rs_sta_dbgfs_rate_scale_data_file =
3317 debugfs_create_file("rate_scale_data", S_IRUSR, dir,
3318 lq_sta, &rs_sta_dbgfs_rate_scale_data_ops);
3319 lq_sta->rs_sta_dbgfs_tx_agg_tid_en_file =
3320 debugfs_create_u8("tx_agg_tid_enable", S_IRUSR | S_IWUSR, dir,
3321 &lq_sta->tx_agg_tid_en);
3322
3323}
3324
3325static void rs_remove_debugfs(void *priv, void *priv_sta)
3326{
3327 struct iwl_lq_sta *lq_sta = priv_sta;
3328 debugfs_remove(lq_sta->rs_sta_dbgfs_scale_table_file);
3329 debugfs_remove(lq_sta->rs_sta_dbgfs_stats_table_file);
3330 debugfs_remove(lq_sta->rs_sta_dbgfs_rate_scale_data_file);
3331 debugfs_remove(lq_sta->rs_sta_dbgfs_tx_agg_tid_en_file);
3332}
3333#endif
3334
3335
3336
3337
3338
3339
3340static void rs_rate_init_stub(void *priv_r, struct ieee80211_supported_band *sband,
3341 struct ieee80211_sta *sta, void *priv_sta)
3342{
3343}
3344static struct rate_control_ops rs_ops = {
3345 .module = NULL,
3346 .name = RS_NAME,
3347 .tx_status = rs_tx_status,
3348 .get_rate = rs_get_rate,
3349 .rate_init = rs_rate_init_stub,
3350 .alloc = rs_alloc,
3351 .free = rs_free,
3352 .alloc_sta = rs_alloc_sta,
3353 .free_sta = rs_free_sta,
3354#ifdef CONFIG_MAC80211_DEBUGFS
3355 .add_sta_debugfs = rs_add_debugfs,
3356 .remove_sta_debugfs = rs_remove_debugfs,
3357#endif
3358};
3359
3360int iwlagn_rate_control_register(void)
3361{
3362 return ieee80211_rate_control_register(&rs_ops);
3363}
3364
3365void iwlagn_rate_control_unregister(void)
3366{
3367 ieee80211_rate_control_unregister(&rs_ops);
3368}
3369
3370