This source file includes following definitions.
- il4965_hwrate_to_plcp_idx
- il4965_rs_dbgfs_set_mcs
- il4965_rs_extract_rate
- il4965_rs_rate_scale_clear_win
- il4965_rs_is_valid_ant
- il4965_rs_tl_rm_old_stats
- il4965_rs_tl_add_packet
- il4965_rs_tl_get_load
- il4965_rs_tl_turn_on_agg_for_tid
- il4965_rs_tl_turn_on_agg
- il4965_get_il4965_num_of_ant_from_rate
- il4965_get_expected_tpt
- il4965_rs_collect_tx_data
- il4965_rate_n_flags_from_tbl
- il4965_rs_get_tbl_info_from_mcs
- il4965_rs_toggle_antenna
- il4965_rs_use_green
- il4965_rs_get_supported_rates
- il4965_rs_get_adjacent_rate
- il4965_rs_get_lower_rate
- il4965_table_type_matches
- il4965_rs_tx_status
- il4965_rs_set_stay_in_table
- il4965_rs_set_expected_tpt_table
- il4965_rs_get_best_rate
- il4965_rs_switch_to_mimo2
- il4965_rs_switch_to_siso
- il4965_rs_move_legacy_other
- il4965_rs_move_siso_to_other
- il4965_rs_move_mimo2_to_other
- il4965_rs_stay_in_table
- il4965_rs_update_rate_tbl
- il4965_rs_rate_scale_perform
- il4965_rs_initialize_lq
- il4965_rs_get_rate
- il4965_rs_alloc_sta
- il4965_rs_rate_init
- il4965_rs_fill_link_cmd
- il4965_rs_alloc
- il4965_rs_free
- il4965_rs_free_sta
- il4965_rs_dbgfs_set_mcs
- il4965_rs_sta_dbgfs_scale_table_write
- il4965_rs_sta_dbgfs_scale_table_read
- il4965_rs_sta_dbgfs_stats_table_read
- il4965_rs_sta_dbgfs_rate_scale_data_read
- il4965_rs_add_debugfs
- il4965_rs_rate_init_stub
- il4965_rate_control_register
- il4965_rate_control_unregister
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11 #include <linux/kernel.h>
12 #include <linux/skbuff.h>
13 #include <linux/slab.h>
14 #include <net/mac80211.h>
15
16 #include <linux/netdevice.h>
17 #include <linux/etherdevice.h>
18 #include <linux/delay.h>
19
20 #include <linux/workqueue.h>
21
22 #include "common.h"
23 #include "4965.h"
24
25 #define IL4965_RS_NAME "iwl-4965-rs"
26
27 #define NUM_TRY_BEFORE_ANT_TOGGLE 1
28 #define IL_NUMBER_TRY 1
29 #define IL_HT_NUMBER_TRY 3
30
31 #define RATE_MAX_WINDOW 62
32 #define RATE_MIN_FAILURE_TH 6
33 #define RATE_MIN_SUCCESS_TH 8
34
35
36 #define IL_MISSED_RATE_MAX 15
37
38 #define RATE_SCALE_FLUSH_INTVL (3*HZ)
39
40 static u8 rs_ht_to_legacy[] = {
41 RATE_6M_IDX, RATE_6M_IDX,
42 RATE_6M_IDX, RATE_6M_IDX,
43 RATE_6M_IDX,
44 RATE_6M_IDX, RATE_9M_IDX,
45 RATE_12M_IDX, RATE_18M_IDX,
46 RATE_24M_IDX, RATE_36M_IDX,
47 RATE_48M_IDX, RATE_54M_IDX
48 };
49
50 static const u8 ant_toggle_lookup[] = {
51 ANT_NONE,
52 ANT_B,
53 ANT_C,
54 ANT_BC,
55 ANT_A,
56 ANT_AB,
57 ANT_AC,
58 ANT_ABC,
59 };
60
61 #define IL_DECLARE_RATE_INFO(r, s, ip, in, rp, rn, pp, np) \
62 [RATE_##r##M_IDX] = { RATE_##r##M_PLCP, \
63 RATE_SISO_##s##M_PLCP, \
64 RATE_MIMO2_##s##M_PLCP,\
65 RATE_##r##M_IEEE, \
66 RATE_##ip##M_IDX, \
67 RATE_##in##M_IDX, \
68 RATE_##rp##M_IDX, \
69 RATE_##rn##M_IDX, \
70 RATE_##pp##M_IDX, \
71 RATE_##np##M_IDX }
72
73
74
75
76
77
78
79
80
81 const struct il_rate_info il_rates[RATE_COUNT] = {
82 IL_DECLARE_RATE_INFO(1, INV, INV, 2, INV, 2, INV, 2),
83 IL_DECLARE_RATE_INFO(2, INV, 1, 5, 1, 5, 1, 5),
84 IL_DECLARE_RATE_INFO(5, INV, 2, 6, 2, 11, 2, 11),
85 IL_DECLARE_RATE_INFO(11, INV, 9, 12, 9, 12, 5, 18),
86 IL_DECLARE_RATE_INFO(6, 6, 5, 9, 5, 11, 5, 11),
87 IL_DECLARE_RATE_INFO(9, 6, 6, 11, 6, 11, 5, 11),
88 IL_DECLARE_RATE_INFO(12, 12, 11, 18, 11, 18, 11, 18),
89 IL_DECLARE_RATE_INFO(18, 18, 12, 24, 12, 24, 11, 24),
90 IL_DECLARE_RATE_INFO(24, 24, 18, 36, 18, 36, 18, 36),
91 IL_DECLARE_RATE_INFO(36, 36, 24, 48, 24, 48, 24, 48),
92 IL_DECLARE_RATE_INFO(48, 48, 36, 54, 36, 54, 36, 54),
93 IL_DECLARE_RATE_INFO(54, 54, 48, INV, 48, INV, 48, INV),
94 IL_DECLARE_RATE_INFO(60, 60, 48, INV, 48, INV, 48, INV),
95 };
96
97 static int
98 il4965_hwrate_to_plcp_idx(u32 rate_n_flags)
99 {
100 int idx = 0;
101
102
103 if (rate_n_flags & RATE_MCS_HT_MSK) {
104 idx = (rate_n_flags & 0xff);
105
106 if (idx >= RATE_MIMO2_6M_PLCP)
107 idx = idx - RATE_MIMO2_6M_PLCP;
108
109 idx += IL_FIRST_OFDM_RATE;
110
111 if (idx >= RATE_9M_IDX)
112 idx += 1;
113 if (idx >= IL_FIRST_OFDM_RATE && idx <= IL_LAST_OFDM_RATE)
114 return idx;
115
116
117 } else {
118 for (idx = 0; idx < ARRAY_SIZE(il_rates); idx++)
119 if (il_rates[idx].plcp == (rate_n_flags & 0xFF))
120 return idx;
121 }
122
123 return -1;
124 }
125
126 static void il4965_rs_rate_scale_perform(struct il_priv *il,
127 struct sk_buff *skb,
128 struct ieee80211_sta *sta,
129 struct il_lq_sta *lq_sta);
130 static void il4965_rs_fill_link_cmd(struct il_priv *il,
131 struct il_lq_sta *lq_sta, u32 rate_n_flags);
132 static void il4965_rs_stay_in_table(struct il_lq_sta *lq_sta,
133 bool force_search);
134
135 #ifdef CONFIG_MAC80211_DEBUGFS
136 static void il4965_rs_dbgfs_set_mcs(struct il_lq_sta *lq_sta,
137 u32 *rate_n_flags, int idx);
138 #else
139 static void
140 il4965_rs_dbgfs_set_mcs(struct il_lq_sta *lq_sta, u32 * rate_n_flags, int idx)
141 {
142 }
143 #endif
144
145
146
147
148
149
150
151
152
153
154
155
156 static s32 expected_tpt_legacy[RATE_COUNT] = {
157 7, 13, 35, 58, 40, 57, 72, 98, 121, 154, 177, 186, 0
158 };
159
160 static s32 expected_tpt_siso20MHz[4][RATE_COUNT] = {
161 {0, 0, 0, 0, 42, 0, 76, 102, 124, 158, 183, 193, 202},
162 {0, 0, 0, 0, 46, 0, 82, 110, 132, 167, 192, 202, 210},
163 {0, 0, 0, 0, 48, 0, 93, 135, 176, 251, 319, 351, 381},
164 {0, 0, 0, 0, 53, 0, 102, 149, 193, 275, 348, 381, 413},
165 };
166
167 static s32 expected_tpt_siso40MHz[4][RATE_COUNT] = {
168 {0, 0, 0, 0, 77, 0, 127, 160, 184, 220, 242, 250, 257},
169 {0, 0, 0, 0, 83, 0, 135, 169, 193, 229, 250, 257, 264},
170 {0, 0, 0, 0, 96, 0, 182, 259, 328, 451, 553, 598, 640},
171 {0, 0, 0, 0, 106, 0, 199, 282, 357, 487, 593, 640, 683},
172 };
173
174 static s32 expected_tpt_mimo2_20MHz[4][RATE_COUNT] = {
175 {0, 0, 0, 0, 74, 0, 123, 155, 179, 213, 235, 243, 250},
176 {0, 0, 0, 0, 81, 0, 131, 164, 187, 221, 242, 250, 256},
177 {0, 0, 0, 0, 92, 0, 175, 250, 317, 436, 534, 578, 619},
178 {0, 0, 0, 0, 102, 0, 192, 273, 344, 470, 573, 619, 660},
179 };
180
181 static s32 expected_tpt_mimo2_40MHz[4][RATE_COUNT] = {
182 {0, 0, 0, 0, 123, 0, 182, 214, 235, 264, 279, 285, 289},
183 {0, 0, 0, 0, 131, 0, 191, 222, 242, 270, 284, 289, 293},
184 {0, 0, 0, 0, 180, 0, 327, 446, 545, 708, 828, 878, 922},
185 {0, 0, 0, 0, 197, 0, 355, 481, 584, 752, 872, 922, 966},
186 };
187
188
189 static const struct il_rate_mcs_info il_rate_mcs[RATE_COUNT] = {
190 {"1", "BPSK DSSS"},
191 {"2", "QPSK DSSS"},
192 {"5.5", "BPSK CCK"},
193 {"11", "QPSK CCK"},
194 {"6", "BPSK 1/2"},
195 {"9", "BPSK 1/2"},
196 {"12", "QPSK 1/2"},
197 {"18", "QPSK 3/4"},
198 {"24", "16QAM 1/2"},
199 {"36", "16QAM 3/4"},
200 {"48", "64QAM 2/3"},
201 {"54", "64QAM 3/4"},
202 {"60", "64QAM 5/6"},
203 };
204
205 #define MCS_IDX_PER_STREAM (8)
206
207 static inline u8
208 il4965_rs_extract_rate(u32 rate_n_flags)
209 {
210 return (u8) (rate_n_flags & 0xFF);
211 }
212
213 static void
214 il4965_rs_rate_scale_clear_win(struct il_rate_scale_data *win)
215 {
216 win->data = 0;
217 win->success_counter = 0;
218 win->success_ratio = IL_INVALID_VALUE;
219 win->counter = 0;
220 win->average_tpt = IL_INVALID_VALUE;
221 win->stamp = 0;
222 }
223
224 static inline u8
225 il4965_rs_is_valid_ant(u8 valid_antenna, u8 ant_type)
226 {
227 return (ant_type & valid_antenna) == ant_type;
228 }
229
230
231
232
233
234 static void
235 il4965_rs_tl_rm_old_stats(struct il_traffic_load *tl, u32 curr_time)
236 {
237
238 u32 oldest_time = curr_time - TID_MAX_TIME_DIFF;
239
240 while (tl->queue_count && tl->time_stamp < oldest_time) {
241 tl->total -= tl->packet_count[tl->head];
242 tl->packet_count[tl->head] = 0;
243 tl->time_stamp += TID_QUEUE_CELL_SPACING;
244 tl->queue_count--;
245 tl->head++;
246 if (tl->head >= TID_QUEUE_MAX_SIZE)
247 tl->head = 0;
248 }
249 }
250
251
252
253
254
255 static u8
256 il4965_rs_tl_add_packet(struct il_lq_sta *lq_data, struct ieee80211_hdr *hdr)
257 {
258 u32 curr_time = jiffies_to_msecs(jiffies);
259 u32 time_diff;
260 s32 idx;
261 struct il_traffic_load *tl = NULL;
262 u8 tid;
263
264 if (ieee80211_is_data_qos(hdr->frame_control)) {
265 u8 *qc = ieee80211_get_qos_ctl(hdr);
266 tid = qc[0] & 0xf;
267 } else
268 return MAX_TID_COUNT;
269
270 if (unlikely(tid >= TID_MAX_LOAD_COUNT))
271 return MAX_TID_COUNT;
272
273 tl = &lq_data->load[tid];
274
275 curr_time -= curr_time % TID_ROUND_VALUE;
276
277
278 if (!(tl->queue_count)) {
279 tl->total = 1;
280 tl->time_stamp = curr_time;
281 tl->queue_count = 1;
282 tl->head = 0;
283 tl->packet_count[0] = 1;
284 return MAX_TID_COUNT;
285 }
286
287 time_diff = TIME_WRAP_AROUND(tl->time_stamp, curr_time);
288 idx = time_diff / TID_QUEUE_CELL_SPACING;
289
290
291
292 if (idx >= TID_QUEUE_MAX_SIZE)
293 il4965_rs_tl_rm_old_stats(tl, curr_time);
294
295 idx = (tl->head + idx) % TID_QUEUE_MAX_SIZE;
296 tl->packet_count[idx] = tl->packet_count[idx] + 1;
297 tl->total = tl->total + 1;
298
299 if ((idx + 1) > tl->queue_count)
300 tl->queue_count = idx + 1;
301
302 return tid;
303 }
304
305
306
307
308 static u32
309 il4965_rs_tl_get_load(struct il_lq_sta *lq_data, u8 tid)
310 {
311 u32 curr_time = jiffies_to_msecs(jiffies);
312 u32 time_diff;
313 s32 idx;
314 struct il_traffic_load *tl = NULL;
315
316 if (tid >= TID_MAX_LOAD_COUNT)
317 return 0;
318
319 tl = &(lq_data->load[tid]);
320
321 curr_time -= curr_time % TID_ROUND_VALUE;
322
323 if (!(tl->queue_count))
324 return 0;
325
326 time_diff = TIME_WRAP_AROUND(tl->time_stamp, curr_time);
327 idx = time_diff / TID_QUEUE_CELL_SPACING;
328
329
330
331 if (idx >= TID_QUEUE_MAX_SIZE)
332 il4965_rs_tl_rm_old_stats(tl, curr_time);
333
334 return tl->total;
335 }
336
337 static int
338 il4965_rs_tl_turn_on_agg_for_tid(struct il_priv *il, struct il_lq_sta *lq_data,
339 u8 tid, struct ieee80211_sta *sta)
340 {
341 int ret = -EAGAIN;
342 u32 load;
343
344 load = il4965_rs_tl_get_load(lq_data, tid);
345
346 if (load > IL_AGG_LOAD_THRESHOLD) {
347 D_HT("Starting Tx agg: STA: %pM tid: %d\n", sta->addr, tid);
348 ret = ieee80211_start_tx_ba_session(sta, tid, 5000);
349 if (ret == -EAGAIN) {
350
351
352
353
354
355 IL_ERR("Fail start Tx agg on tid: %d\n", tid);
356 ieee80211_stop_tx_ba_session(sta, tid);
357 }
358 } else
359 D_HT("Aggregation not enabled for tid %d because load = %u\n",
360 tid, load);
361
362 return ret;
363 }
364
365 static void
366 il4965_rs_tl_turn_on_agg(struct il_priv *il, u8 tid, struct il_lq_sta *lq_data,
367 struct ieee80211_sta *sta)
368 {
369 if (tid < TID_MAX_LOAD_COUNT)
370 il4965_rs_tl_turn_on_agg_for_tid(il, lq_data, tid, sta);
371 else
372 IL_ERR("tid exceeds max load count: %d/%d\n", tid,
373 TID_MAX_LOAD_COUNT);
374 }
375
376 static inline int
377 il4965_get_il4965_num_of_ant_from_rate(u32 rate_n_flags)
378 {
379 return !!(rate_n_flags & RATE_MCS_ANT_A_MSK) +
380 !!(rate_n_flags & RATE_MCS_ANT_B_MSK) +
381 !!(rate_n_flags & RATE_MCS_ANT_C_MSK);
382 }
383
384
385
386
387
388 static s32
389 il4965_get_expected_tpt(struct il_scale_tbl_info *tbl, int rs_idx)
390 {
391 if (tbl->expected_tpt)
392 return tbl->expected_tpt[rs_idx];
393 return 0;
394 }
395
396
397
398
399
400
401
402
403 static int
404 il4965_rs_collect_tx_data(struct il_scale_tbl_info *tbl, int scale_idx,
405 int attempts, int successes)
406 {
407 struct il_rate_scale_data *win = NULL;
408 static const u64 mask = (((u64) 1) << (RATE_MAX_WINDOW - 1));
409 s32 fail_count, tpt;
410
411 if (scale_idx < 0 || scale_idx >= RATE_COUNT)
412 return -EINVAL;
413
414
415 win = &(tbl->win[scale_idx]);
416
417
418 tpt = il4965_get_expected_tpt(tbl, scale_idx);
419
420
421
422
423
424
425
426
427
428 while (attempts > 0) {
429 if (win->counter >= RATE_MAX_WINDOW) {
430
431
432 win->counter = RATE_MAX_WINDOW - 1;
433
434 if (win->data & mask) {
435 win->data &= ~mask;
436 win->success_counter--;
437 }
438 }
439
440
441 win->counter++;
442
443
444 win->data <<= 1;
445
446
447 if (successes > 0) {
448 win->success_counter++;
449 win->data |= 0x1;
450 successes--;
451 }
452
453 attempts--;
454 }
455
456
457 if (win->counter > 0)
458 win->success_ratio =
459 128 * (100 * win->success_counter) / win->counter;
460 else
461 win->success_ratio = IL_INVALID_VALUE;
462
463 fail_count = win->counter - win->success_counter;
464
465
466 if (fail_count >= RATE_MIN_FAILURE_TH ||
467 win->success_counter >= RATE_MIN_SUCCESS_TH)
468 win->average_tpt = (win->success_ratio * tpt + 64) / 128;
469 else
470 win->average_tpt = IL_INVALID_VALUE;
471
472
473 win->stamp = jiffies;
474
475 return 0;
476 }
477
478
479
480
481 static u32
482 il4965_rate_n_flags_from_tbl(struct il_priv *il, struct il_scale_tbl_info *tbl,
483 int idx, u8 use_green)
484 {
485 u32 rate_n_flags = 0;
486
487 if (is_legacy(tbl->lq_type)) {
488 rate_n_flags = il_rates[idx].plcp;
489 if (idx >= IL_FIRST_CCK_RATE && idx <= IL_LAST_CCK_RATE)
490 rate_n_flags |= RATE_MCS_CCK_MSK;
491
492 } else if (is_Ht(tbl->lq_type)) {
493 if (idx > IL_LAST_OFDM_RATE) {
494 IL_ERR("Invalid HT rate idx %d\n", idx);
495 idx = IL_LAST_OFDM_RATE;
496 }
497 rate_n_flags = RATE_MCS_HT_MSK;
498
499 if (is_siso(tbl->lq_type))
500 rate_n_flags |= il_rates[idx].plcp_siso;
501 else
502 rate_n_flags |= il_rates[idx].plcp_mimo2;
503 } else {
504 IL_ERR("Invalid tbl->lq_type %d\n", tbl->lq_type);
505 }
506
507 rate_n_flags |=
508 ((tbl->ant_type << RATE_MCS_ANT_POS) & RATE_MCS_ANT_ABC_MSK);
509
510 if (is_Ht(tbl->lq_type)) {
511 if (tbl->is_ht40) {
512 if (tbl->is_dup)
513 rate_n_flags |= RATE_MCS_DUP_MSK;
514 else
515 rate_n_flags |= RATE_MCS_HT40_MSK;
516 }
517 if (tbl->is_SGI)
518 rate_n_flags |= RATE_MCS_SGI_MSK;
519
520 if (use_green) {
521 rate_n_flags |= RATE_MCS_GF_MSK;
522 if (is_siso(tbl->lq_type) && tbl->is_SGI) {
523 rate_n_flags &= ~RATE_MCS_SGI_MSK;
524 IL_ERR("GF was set with SGI:SISO\n");
525 }
526 }
527 }
528 return rate_n_flags;
529 }
530
531
532
533
534
535 static int
536 il4965_rs_get_tbl_info_from_mcs(const u32 rate_n_flags,
537 enum nl80211_band band,
538 struct il_scale_tbl_info *tbl, int *rate_idx)
539 {
540 u32 ant_msk = (rate_n_flags & RATE_MCS_ANT_ABC_MSK);
541 u8 il4965_num_of_ant =
542 il4965_get_il4965_num_of_ant_from_rate(rate_n_flags);
543 u8 mcs;
544
545 memset(tbl, 0, sizeof(struct il_scale_tbl_info));
546 *rate_idx = il4965_hwrate_to_plcp_idx(rate_n_flags);
547
548 if (*rate_idx == RATE_INVALID) {
549 *rate_idx = -1;
550 return -EINVAL;
551 }
552 tbl->is_SGI = 0;
553 tbl->is_ht40 = 0;
554 tbl->is_dup = 0;
555 tbl->ant_type = (ant_msk >> RATE_MCS_ANT_POS);
556 tbl->lq_type = LQ_NONE;
557 tbl->max_search = IL_MAX_SEARCH;
558
559
560 if (!(rate_n_flags & RATE_MCS_HT_MSK)) {
561 if (il4965_num_of_ant == 1) {
562 if (band == NL80211_BAND_5GHZ)
563 tbl->lq_type = LQ_A;
564 else
565 tbl->lq_type = LQ_G;
566 }
567
568 } else {
569 if (rate_n_flags & RATE_MCS_SGI_MSK)
570 tbl->is_SGI = 1;
571
572 if ((rate_n_flags & RATE_MCS_HT40_MSK) ||
573 (rate_n_flags & RATE_MCS_DUP_MSK))
574 tbl->is_ht40 = 1;
575
576 if (rate_n_flags & RATE_MCS_DUP_MSK)
577 tbl->is_dup = 1;
578
579 mcs = il4965_rs_extract_rate(rate_n_flags);
580
581
582 if (mcs <= RATE_SISO_60M_PLCP) {
583 if (il4965_num_of_ant == 1)
584 tbl->lq_type = LQ_SISO;
585
586 } else {
587 if (il4965_num_of_ant == 2)
588 tbl->lq_type = LQ_MIMO2;
589 }
590 }
591 return 0;
592 }
593
594
595
596 static int
597 il4965_rs_toggle_antenna(u32 valid_ant, u32 *rate_n_flags,
598 struct il_scale_tbl_info *tbl)
599 {
600 u8 new_ant_type;
601
602 if (!tbl->ant_type || tbl->ant_type > ANT_ABC)
603 return 0;
604
605 if (!il4965_rs_is_valid_ant(valid_ant, tbl->ant_type))
606 return 0;
607
608 new_ant_type = ant_toggle_lookup[tbl->ant_type];
609
610 while (new_ant_type != tbl->ant_type &&
611 !il4965_rs_is_valid_ant(valid_ant, new_ant_type))
612 new_ant_type = ant_toggle_lookup[new_ant_type];
613
614 if (new_ant_type == tbl->ant_type)
615 return 0;
616
617 tbl->ant_type = new_ant_type;
618 *rate_n_flags &= ~RATE_MCS_ANT_ABC_MSK;
619 *rate_n_flags |= new_ant_type << RATE_MCS_ANT_POS;
620 return 1;
621 }
622
623
624
625
626
627 static bool
628 il4965_rs_use_green(struct il_priv *il, struct ieee80211_sta *sta)
629 {
630 return (sta->ht_cap.cap & IEEE80211_HT_CAP_GRN_FLD) &&
631 !il->ht.non_gf_sta_present;
632 }
633
634
635
636
637
638
639
640
641 static u16
642 il4965_rs_get_supported_rates(struct il_lq_sta *lq_sta,
643 struct ieee80211_hdr *hdr,
644 enum il_table_type rate_type)
645 {
646 if (is_legacy(rate_type)) {
647 return lq_sta->active_legacy_rate;
648 } else {
649 if (is_siso(rate_type))
650 return lq_sta->active_siso_rate;
651 else
652 return lq_sta->active_mimo2_rate;
653 }
654 }
655
656 static u16
657 il4965_rs_get_adjacent_rate(struct il_priv *il, u8 idx, u16 rate_mask,
658 int rate_type)
659 {
660 u8 high = RATE_INVALID;
661 u8 low = RATE_INVALID;
662
663
664
665 if (is_a_band(rate_type) || !is_legacy(rate_type)) {
666 int i;
667 u32 mask;
668
669
670 i = idx - 1;
671 for (mask = (1 << i); i >= 0; i--, mask >>= 1) {
672 if (rate_mask & mask) {
673 low = i;
674 break;
675 }
676 }
677
678
679 i = idx + 1;
680 for (mask = (1 << i); i < RATE_COUNT; i++, mask <<= 1) {
681 if (rate_mask & mask) {
682 high = i;
683 break;
684 }
685 }
686
687 return (high << 8) | low;
688 }
689
690 low = idx;
691 while (low != RATE_INVALID) {
692 low = il_rates[low].prev_rs;
693 if (low == RATE_INVALID)
694 break;
695 if (rate_mask & (1 << low))
696 break;
697 D_RATE("Skipping masked lower rate: %d\n", low);
698 }
699
700 high = idx;
701 while (high != RATE_INVALID) {
702 high = il_rates[high].next_rs;
703 if (high == RATE_INVALID)
704 break;
705 if (rate_mask & (1 << high))
706 break;
707 D_RATE("Skipping masked higher rate: %d\n", high);
708 }
709
710 return (high << 8) | low;
711 }
712
713 static u32
714 il4965_rs_get_lower_rate(struct il_lq_sta *lq_sta,
715 struct il_scale_tbl_info *tbl, u8 scale_idx,
716 u8 ht_possible)
717 {
718 s32 low;
719 u16 rate_mask;
720 u16 high_low;
721 u8 switch_to_legacy = 0;
722 u8 is_green = lq_sta->is_green;
723 struct il_priv *il = lq_sta->drv;
724
725
726
727
728 if (!is_legacy(tbl->lq_type) && (!ht_possible || !scale_idx)) {
729 switch_to_legacy = 1;
730 scale_idx = rs_ht_to_legacy[scale_idx];
731 if (lq_sta->band == NL80211_BAND_5GHZ)
732 tbl->lq_type = LQ_A;
733 else
734 tbl->lq_type = LQ_G;
735
736 if (il4965_num_of_ant(tbl->ant_type) > 1)
737 tbl->ant_type =
738 il4965_first_antenna(il->hw_params.valid_tx_ant);
739
740 tbl->is_ht40 = 0;
741 tbl->is_SGI = 0;
742 tbl->max_search = IL_MAX_SEARCH;
743 }
744
745 rate_mask = il4965_rs_get_supported_rates(lq_sta, NULL, tbl->lq_type);
746
747
748 if (is_legacy(tbl->lq_type)) {
749
750 if (lq_sta->band == NL80211_BAND_5GHZ)
751 rate_mask =
752 (u16) (rate_mask &
753 (lq_sta->supp_rates << IL_FIRST_OFDM_RATE));
754 else
755 rate_mask = (u16) (rate_mask & lq_sta->supp_rates);
756 }
757
758
759 if (switch_to_legacy && (rate_mask & (1 << scale_idx))) {
760 low = scale_idx;
761 goto out;
762 }
763
764 high_low =
765 il4965_rs_get_adjacent_rate(lq_sta->drv, scale_idx, rate_mask,
766 tbl->lq_type);
767 low = high_low & 0xff;
768
769 if (low == RATE_INVALID)
770 low = scale_idx;
771
772 out:
773 return il4965_rate_n_flags_from_tbl(lq_sta->drv, tbl, low, is_green);
774 }
775
776
777
778
779 static bool
780 il4965_table_type_matches(struct il_scale_tbl_info *a,
781 struct il_scale_tbl_info *b)
782 {
783 return (a->lq_type == b->lq_type && a->ant_type == b->ant_type &&
784 a->is_SGI == b->is_SGI);
785 }
786
787
788
789
790 static void
791 il4965_rs_tx_status(void *il_r, struct ieee80211_supported_band *sband,
792 struct ieee80211_sta *sta, void *il_sta,
793 struct sk_buff *skb)
794 {
795 int legacy_success;
796 int retries;
797 int rs_idx, mac_idx, i;
798 struct il_lq_sta *lq_sta = il_sta;
799 struct il_link_quality_cmd *table;
800 struct ieee80211_hdr *hdr = (struct ieee80211_hdr *)skb->data;
801 struct il_priv *il = (struct il_priv *)il_r;
802 struct ieee80211_tx_info *info = IEEE80211_SKB_CB(skb);
803 enum mac80211_rate_control_flags mac_flags;
804 u32 tx_rate;
805 struct il_scale_tbl_info tbl_type;
806 struct il_scale_tbl_info *curr_tbl, *other_tbl, *tmp_tbl;
807
808 D_RATE("get frame ack response, update rate scale win\n");
809
810
811 if (!lq_sta) {
812 D_RATE("Station rate scaling not created yet.\n");
813 return;
814 } else if (!lq_sta->drv) {
815 D_RATE("Rate scaling not initialized yet.\n");
816 return;
817 }
818
819 if (!ieee80211_is_data(hdr->frame_control) ||
820 (info->flags & IEEE80211_TX_CTL_NO_ACK))
821 return;
822
823
824 if ((info->flags & IEEE80211_TX_CTL_AMPDU) &&
825 !(info->flags & IEEE80211_TX_STAT_AMPDU))
826 return;
827
828
829
830
831
832
833
834
835
836 table = &lq_sta->lq;
837 tx_rate = le32_to_cpu(table->rs_table[0].rate_n_flags);
838 il4965_rs_get_tbl_info_from_mcs(tx_rate, il->band, &tbl_type, &rs_idx);
839 if (il->band == NL80211_BAND_5GHZ)
840 rs_idx -= IL_FIRST_OFDM_RATE;
841 mac_flags = info->status.rates[0].flags;
842 mac_idx = info->status.rates[0].idx;
843
844 if (mac_flags & IEEE80211_TX_RC_MCS) {
845 mac_idx &= RATE_MCS_CODE_MSK;
846 if (mac_idx >= (RATE_9M_IDX - IL_FIRST_OFDM_RATE))
847 mac_idx++;
848
849
850
851
852 if (il->band == NL80211_BAND_2GHZ)
853 mac_idx += IL_FIRST_OFDM_RATE;
854 }
855
856 if (mac_idx < 0 ||
857 tbl_type.is_SGI != !!(mac_flags & IEEE80211_TX_RC_SHORT_GI) ||
858 tbl_type.is_ht40 != !!(mac_flags & IEEE80211_TX_RC_40_MHZ_WIDTH) ||
859 tbl_type.is_dup != !!(mac_flags & IEEE80211_TX_RC_DUP_DATA) ||
860 tbl_type.ant_type != info->status.antenna ||
861 !!(tx_rate & RATE_MCS_HT_MSK) != !!(mac_flags & IEEE80211_TX_RC_MCS)
862 || !!(tx_rate & RATE_MCS_GF_MSK) !=
863 !!(mac_flags & IEEE80211_TX_RC_GREEN_FIELD) || rs_idx != mac_idx) {
864 D_RATE("initial rate %d does not match %d (0x%x)\n", mac_idx,
865 rs_idx, tx_rate);
866
867
868
869
870
871 lq_sta->missed_rate_counter++;
872 if (lq_sta->missed_rate_counter > IL_MISSED_RATE_MAX) {
873 lq_sta->missed_rate_counter = 0;
874 il_send_lq_cmd(il, &lq_sta->lq, CMD_ASYNC, false);
875 }
876
877 return;
878 } else
879
880 lq_sta->missed_rate_counter = 0;
881
882
883 if (il4965_table_type_matches
884 (&tbl_type, &(lq_sta->lq_info[lq_sta->active_tbl]))) {
885 curr_tbl = &(lq_sta->lq_info[lq_sta->active_tbl]);
886 other_tbl = &(lq_sta->lq_info[1 - lq_sta->active_tbl]);
887 } else
888 if (il4965_table_type_matches
889 (&tbl_type, &lq_sta->lq_info[1 - lq_sta->active_tbl])) {
890 curr_tbl = &(lq_sta->lq_info[1 - lq_sta->active_tbl]);
891 other_tbl = &(lq_sta->lq_info[lq_sta->active_tbl]);
892 } else {
893 D_RATE("Neither active nor search matches tx rate\n");
894 tmp_tbl = &(lq_sta->lq_info[lq_sta->active_tbl]);
895 D_RATE("active- lq:%x, ant:%x, SGI:%d\n", tmp_tbl->lq_type,
896 tmp_tbl->ant_type, tmp_tbl->is_SGI);
897 tmp_tbl = &(lq_sta->lq_info[1 - lq_sta->active_tbl]);
898 D_RATE("search- lq:%x, ant:%x, SGI:%d\n", tmp_tbl->lq_type,
899 tmp_tbl->ant_type, tmp_tbl->is_SGI);
900 D_RATE("actual- lq:%x, ant:%x, SGI:%d\n", tbl_type.lq_type,
901 tbl_type.ant_type, tbl_type.is_SGI);
902
903
904
905
906 il4965_rs_stay_in_table(lq_sta, true);
907 goto done;
908 }
909
910
911
912
913
914
915
916
917 if (info->flags & IEEE80211_TX_STAT_AMPDU) {
918 tx_rate = le32_to_cpu(table->rs_table[0].rate_n_flags);
919 il4965_rs_get_tbl_info_from_mcs(tx_rate, il->band, &tbl_type,
920 &rs_idx);
921 il4965_rs_collect_tx_data(curr_tbl, rs_idx,
922 info->status.ampdu_len,
923 info->status.ampdu_ack_len);
924
925
926 if (lq_sta->stay_in_tbl) {
927 lq_sta->total_success += info->status.ampdu_ack_len;
928 lq_sta->total_failed +=
929 (info->status.ampdu_len -
930 info->status.ampdu_ack_len);
931 }
932 } else {
933
934
935
936 retries = info->status.rates[0].count - 1;
937
938 retries = min(retries, 15);
939
940
941 legacy_success = !!(info->flags & IEEE80211_TX_STAT_ACK);
942
943 for (i = 0; i <= retries; ++i) {
944 tx_rate = le32_to_cpu(table->rs_table[i].rate_n_flags);
945 il4965_rs_get_tbl_info_from_mcs(tx_rate, il->band,
946 &tbl_type, &rs_idx);
947
948
949
950
951 if (il4965_table_type_matches(&tbl_type, curr_tbl))
952 tmp_tbl = curr_tbl;
953 else if (il4965_table_type_matches
954 (&tbl_type, other_tbl))
955 tmp_tbl = other_tbl;
956 else
957 continue;
958 il4965_rs_collect_tx_data(tmp_tbl, rs_idx, 1,
959 i <
960 retries ? 0 : legacy_success);
961 }
962
963
964 if (lq_sta->stay_in_tbl) {
965 lq_sta->total_success += legacy_success;
966 lq_sta->total_failed += retries + (1 - legacy_success);
967 }
968 }
969
970 lq_sta->last_rate_n_flags = tx_rate;
971 done:
972
973 if (sta->supp_rates[sband->band])
974 il4965_rs_rate_scale_perform(il, skb, sta, lq_sta);
975 }
976
977
978
979
980
981
982
983
984
985 static void
986 il4965_rs_set_stay_in_table(struct il_priv *il, u8 is_legacy,
987 struct il_lq_sta *lq_sta)
988 {
989 D_RATE("we are staying in the same table\n");
990 lq_sta->stay_in_tbl = 1;
991 if (is_legacy) {
992 lq_sta->table_count_limit = IL_LEGACY_TBL_COUNT;
993 lq_sta->max_failure_limit = IL_LEGACY_FAILURE_LIMIT;
994 lq_sta->max_success_limit = IL_LEGACY_SUCCESS_LIMIT;
995 } else {
996 lq_sta->table_count_limit = IL_NONE_LEGACY_TBL_COUNT;
997 lq_sta->max_failure_limit = IL_NONE_LEGACY_FAILURE_LIMIT;
998 lq_sta->max_success_limit = IL_NONE_LEGACY_SUCCESS_LIMIT;
999 }
1000 lq_sta->table_count = 0;
1001 lq_sta->total_failed = 0;
1002 lq_sta->total_success = 0;
1003 lq_sta->flush_timer = jiffies;
1004 lq_sta->action_counter = 0;
1005 }
1006
1007
1008
1009
1010 static void
1011 il4965_rs_set_expected_tpt_table(struct il_lq_sta *lq_sta,
1012 struct il_scale_tbl_info *tbl)
1013 {
1014
1015 s32(*ht_tbl_pointer)[RATE_COUNT];
1016
1017
1018 if (WARN_ON_ONCE(!is_legacy(tbl->lq_type) && !is_Ht(tbl->lq_type))) {
1019 tbl->expected_tpt = expected_tpt_legacy;
1020 return;
1021 }
1022
1023
1024 if (is_legacy(tbl->lq_type)) {
1025 tbl->expected_tpt = expected_tpt_legacy;
1026 return;
1027 }
1028
1029
1030
1031
1032 if (is_siso(tbl->lq_type) && (!tbl->is_ht40 || lq_sta->is_dup))
1033 ht_tbl_pointer = expected_tpt_siso20MHz;
1034 else if (is_siso(tbl->lq_type))
1035 ht_tbl_pointer = expected_tpt_siso40MHz;
1036 else if (is_mimo2(tbl->lq_type) && (!tbl->is_ht40 || lq_sta->is_dup))
1037 ht_tbl_pointer = expected_tpt_mimo2_20MHz;
1038 else
1039 ht_tbl_pointer = expected_tpt_mimo2_40MHz;
1040
1041 if (!tbl->is_SGI && !lq_sta->is_agg)
1042 tbl->expected_tpt = ht_tbl_pointer[0];
1043 else if (tbl->is_SGI && !lq_sta->is_agg)
1044 tbl->expected_tpt = ht_tbl_pointer[1];
1045 else if (!tbl->is_SGI && lq_sta->is_agg)
1046 tbl->expected_tpt = ht_tbl_pointer[2];
1047 else
1048 tbl->expected_tpt = ht_tbl_pointer[3];
1049 }
1050
1051
1052
1053
1054
1055
1056
1057
1058
1059
1060
1061
1062
1063 static s32
1064 il4965_rs_get_best_rate(struct il_priv *il, struct il_lq_sta *lq_sta,
1065 struct il_scale_tbl_info *tbl,
1066 u16 rate_mask, s8 idx)
1067 {
1068
1069 struct il_scale_tbl_info *active_tbl =
1070 &(lq_sta->lq_info[lq_sta->active_tbl]);
1071 s32 active_sr = active_tbl->win[idx].success_ratio;
1072 s32 active_tpt = active_tbl->expected_tpt[idx];
1073
1074
1075 s32 *tpt_tbl = tbl->expected_tpt;
1076
1077 s32 new_rate, high, low, start_hi;
1078 u16 high_low;
1079 s8 rate = idx;
1080
1081 new_rate = high = low = start_hi = RATE_INVALID;
1082
1083 for (;;) {
1084 high_low =
1085 il4965_rs_get_adjacent_rate(il, rate, rate_mask,
1086 tbl->lq_type);
1087
1088 low = high_low & 0xff;
1089 high = (high_low >> 8) & 0xff;
1090
1091
1092
1093
1094
1095
1096
1097
1098
1099
1100
1101
1102
1103
1104
1105
1106 if ((100 * tpt_tbl[rate] > lq_sta->last_tpt &&
1107 (active_sr > RATE_DECREASE_TH && active_sr <= RATE_HIGH_TH
1108 && tpt_tbl[rate] <= active_tpt)) ||
1109 (active_sr >= RATE_SCALE_SWITCH &&
1110 tpt_tbl[rate] > active_tpt)) {
1111
1112
1113
1114
1115 if (start_hi != RATE_INVALID) {
1116 new_rate = start_hi;
1117 break;
1118 }
1119
1120 new_rate = rate;
1121
1122
1123 if (low != RATE_INVALID)
1124 rate = low;
1125
1126
1127 else
1128 break;
1129
1130
1131 } else {
1132
1133
1134
1135 if (new_rate != RATE_INVALID)
1136 break;
1137
1138
1139 else if (high != RATE_INVALID) {
1140 start_hi = high;
1141 rate = high;
1142
1143
1144 } else {
1145 new_rate = rate;
1146 break;
1147 }
1148 }
1149 }
1150
1151 return new_rate;
1152 }
1153
1154
1155
1156
1157 static int
1158 il4965_rs_switch_to_mimo2(struct il_priv *il, struct il_lq_sta *lq_sta,
1159 struct ieee80211_conf *conf,
1160 struct ieee80211_sta *sta,
1161 struct il_scale_tbl_info *tbl, int idx)
1162 {
1163 u16 rate_mask;
1164 s32 rate;
1165 s8 is_green = lq_sta->is_green;
1166
1167 if (!conf_is_ht(conf) || !sta->ht_cap.ht_supported)
1168 return -1;
1169
1170 if (sta->smps_mode == IEEE80211_SMPS_STATIC)
1171 return -1;
1172
1173
1174 if (il->hw_params.tx_chains_num < 2)
1175 return -1;
1176
1177 D_RATE("LQ: try to switch to MIMO2\n");
1178
1179 tbl->lq_type = LQ_MIMO2;
1180 tbl->is_dup = lq_sta->is_dup;
1181 tbl->action = 0;
1182 tbl->max_search = IL_MAX_SEARCH;
1183 rate_mask = lq_sta->active_mimo2_rate;
1184
1185 if (il_is_ht40_tx_allowed(il, &sta->ht_cap))
1186 tbl->is_ht40 = 1;
1187 else
1188 tbl->is_ht40 = 0;
1189
1190 il4965_rs_set_expected_tpt_table(lq_sta, tbl);
1191
1192 rate = il4965_rs_get_best_rate(il, lq_sta, tbl, rate_mask, idx);
1193
1194 D_RATE("LQ: MIMO2 best rate %d mask %X\n", rate, rate_mask);
1195 if (rate == RATE_INVALID || !((1 << rate) & rate_mask)) {
1196 D_RATE("Can't switch with idx %d rate mask %x\n", rate,
1197 rate_mask);
1198 return -1;
1199 }
1200 tbl->current_rate =
1201 il4965_rate_n_flags_from_tbl(il, tbl, rate, is_green);
1202
1203 D_RATE("LQ: Switch to new mcs %X idx is green %X\n", tbl->current_rate,
1204 is_green);
1205 return 0;
1206 }
1207
1208
1209
1210
1211 static int
1212 il4965_rs_switch_to_siso(struct il_priv *il, struct il_lq_sta *lq_sta,
1213 struct ieee80211_conf *conf, struct ieee80211_sta *sta,
1214 struct il_scale_tbl_info *tbl, int idx)
1215 {
1216 u16 rate_mask;
1217 u8 is_green = lq_sta->is_green;
1218 s32 rate;
1219
1220 if (!conf_is_ht(conf) || !sta->ht_cap.ht_supported)
1221 return -1;
1222
1223 D_RATE("LQ: try to switch to SISO\n");
1224
1225 tbl->is_dup = lq_sta->is_dup;
1226 tbl->lq_type = LQ_SISO;
1227 tbl->action = 0;
1228 tbl->max_search = IL_MAX_SEARCH;
1229 rate_mask = lq_sta->active_siso_rate;
1230
1231 if (il_is_ht40_tx_allowed(il, &sta->ht_cap))
1232 tbl->is_ht40 = 1;
1233 else
1234 tbl->is_ht40 = 0;
1235
1236 if (is_green)
1237 tbl->is_SGI = 0;
1238
1239 il4965_rs_set_expected_tpt_table(lq_sta, tbl);
1240 rate = il4965_rs_get_best_rate(il, lq_sta, tbl, rate_mask, idx);
1241
1242 D_RATE("LQ: get best rate %d mask %X\n", rate, rate_mask);
1243 if (rate == RATE_INVALID || !((1 << rate) & rate_mask)) {
1244 D_RATE("can not switch with idx %d rate mask %x\n", rate,
1245 rate_mask);
1246 return -1;
1247 }
1248 tbl->current_rate =
1249 il4965_rate_n_flags_from_tbl(il, tbl, rate, is_green);
1250 D_RATE("LQ: Switch to new mcs %X idx is green %X\n", tbl->current_rate,
1251 is_green);
1252 return 0;
1253 }
1254
1255
1256
1257
1258 static int
1259 il4965_rs_move_legacy_other(struct il_priv *il, struct il_lq_sta *lq_sta,
1260 struct ieee80211_conf *conf,
1261 struct ieee80211_sta *sta, int idx)
1262 {
1263 struct il_scale_tbl_info *tbl = &(lq_sta->lq_info[lq_sta->active_tbl]);
1264 struct il_scale_tbl_info *search_tbl =
1265 &(lq_sta->lq_info[(1 - lq_sta->active_tbl)]);
1266 struct il_rate_scale_data *win = &(tbl->win[idx]);
1267 u32 sz =
1268 (sizeof(struct il_scale_tbl_info) -
1269 (sizeof(struct il_rate_scale_data) * RATE_COUNT));
1270 u8 start_action;
1271 u8 valid_tx_ant = il->hw_params.valid_tx_ant;
1272 u8 tx_chains_num = il->hw_params.tx_chains_num;
1273 int ret = 0;
1274 u8 update_search_tbl_counter = 0;
1275
1276 tbl->action = IL_LEGACY_SWITCH_SISO;
1277
1278 start_action = tbl->action;
1279 for (;;) {
1280 lq_sta->action_counter++;
1281 switch (tbl->action) {
1282 case IL_LEGACY_SWITCH_ANTENNA1:
1283 case IL_LEGACY_SWITCH_ANTENNA2:
1284 D_RATE("LQ: Legacy toggle Antenna\n");
1285
1286 if ((tbl->action == IL_LEGACY_SWITCH_ANTENNA1 &&
1287 tx_chains_num <= 1) ||
1288 (tbl->action == IL_LEGACY_SWITCH_ANTENNA2 &&
1289 tx_chains_num <= 2))
1290 break;
1291
1292
1293 if (win->success_ratio >= IL_RS_GOOD_RATIO)
1294 break;
1295
1296
1297 memcpy(search_tbl, tbl, sz);
1298
1299 if (il4965_rs_toggle_antenna
1300 (valid_tx_ant, &search_tbl->current_rate,
1301 search_tbl)) {
1302 update_search_tbl_counter = 1;
1303 il4965_rs_set_expected_tpt_table(lq_sta,
1304 search_tbl);
1305 goto out;
1306 }
1307 break;
1308 case IL_LEGACY_SWITCH_SISO:
1309 D_RATE("LQ: Legacy switch to SISO\n");
1310
1311
1312 memcpy(search_tbl, tbl, sz);
1313 search_tbl->is_SGI = 0;
1314 ret =
1315 il4965_rs_switch_to_siso(il, lq_sta, conf, sta,
1316 search_tbl, idx);
1317 if (!ret) {
1318 lq_sta->action_counter = 0;
1319 goto out;
1320 }
1321
1322 break;
1323 case IL_LEGACY_SWITCH_MIMO2_AB:
1324 case IL_LEGACY_SWITCH_MIMO2_AC:
1325 case IL_LEGACY_SWITCH_MIMO2_BC:
1326 D_RATE("LQ: Legacy switch to MIMO2\n");
1327
1328
1329 memcpy(search_tbl, tbl, sz);
1330 search_tbl->is_SGI = 0;
1331
1332 if (tbl->action == IL_LEGACY_SWITCH_MIMO2_AB)
1333 search_tbl->ant_type = ANT_AB;
1334 else if (tbl->action == IL_LEGACY_SWITCH_MIMO2_AC)
1335 search_tbl->ant_type = ANT_AC;
1336 else
1337 search_tbl->ant_type = ANT_BC;
1338
1339 if (!il4965_rs_is_valid_ant
1340 (valid_tx_ant, search_tbl->ant_type))
1341 break;
1342
1343 ret =
1344 il4965_rs_switch_to_mimo2(il, lq_sta, conf, sta,
1345 search_tbl, idx);
1346 if (!ret) {
1347 lq_sta->action_counter = 0;
1348 goto out;
1349 }
1350 break;
1351 }
1352 tbl->action++;
1353 if (tbl->action > IL_LEGACY_SWITCH_MIMO2_BC)
1354 tbl->action = IL_LEGACY_SWITCH_ANTENNA1;
1355
1356 if (tbl->action == start_action)
1357 break;
1358
1359 }
1360 search_tbl->lq_type = LQ_NONE;
1361 return 0;
1362
1363 out:
1364 lq_sta->search_better_tbl = 1;
1365 tbl->action++;
1366 if (tbl->action > IL_LEGACY_SWITCH_MIMO2_BC)
1367 tbl->action = IL_LEGACY_SWITCH_ANTENNA1;
1368 if (update_search_tbl_counter)
1369 search_tbl->action = tbl->action;
1370 return 0;
1371
1372 }
1373
1374
1375
1376
1377 static int
1378 il4965_rs_move_siso_to_other(struct il_priv *il, struct il_lq_sta *lq_sta,
1379 struct ieee80211_conf *conf,
1380 struct ieee80211_sta *sta, int idx)
1381 {
1382 u8 is_green = lq_sta->is_green;
1383 struct il_scale_tbl_info *tbl = &(lq_sta->lq_info[lq_sta->active_tbl]);
1384 struct il_scale_tbl_info *search_tbl =
1385 &(lq_sta->lq_info[(1 - lq_sta->active_tbl)]);
1386 struct il_rate_scale_data *win = &(tbl->win[idx]);
1387 struct ieee80211_sta_ht_cap *ht_cap = &sta->ht_cap;
1388 u32 sz =
1389 (sizeof(struct il_scale_tbl_info) -
1390 (sizeof(struct il_rate_scale_data) * RATE_COUNT));
1391 u8 start_action;
1392 u8 valid_tx_ant = il->hw_params.valid_tx_ant;
1393 u8 tx_chains_num = il->hw_params.tx_chains_num;
1394 u8 update_search_tbl_counter = 0;
1395 int ret;
1396
1397 start_action = tbl->action;
1398
1399 for (;;) {
1400 lq_sta->action_counter++;
1401 switch (tbl->action) {
1402 case IL_SISO_SWITCH_ANTENNA1:
1403 case IL_SISO_SWITCH_ANTENNA2:
1404 D_RATE("LQ: SISO toggle Antenna\n");
1405 if ((tbl->action == IL_SISO_SWITCH_ANTENNA1 &&
1406 tx_chains_num <= 1) ||
1407 (tbl->action == IL_SISO_SWITCH_ANTENNA2 &&
1408 tx_chains_num <= 2))
1409 break;
1410
1411 if (win->success_ratio >= IL_RS_GOOD_RATIO)
1412 break;
1413
1414 memcpy(search_tbl, tbl, sz);
1415 if (il4965_rs_toggle_antenna
1416 (valid_tx_ant, &search_tbl->current_rate,
1417 search_tbl)) {
1418 update_search_tbl_counter = 1;
1419 goto out;
1420 }
1421 break;
1422 case IL_SISO_SWITCH_MIMO2_AB:
1423 case IL_SISO_SWITCH_MIMO2_AC:
1424 case IL_SISO_SWITCH_MIMO2_BC:
1425 D_RATE("LQ: SISO switch to MIMO2\n");
1426 memcpy(search_tbl, tbl, sz);
1427 search_tbl->is_SGI = 0;
1428
1429 if (tbl->action == IL_SISO_SWITCH_MIMO2_AB)
1430 search_tbl->ant_type = ANT_AB;
1431 else if (tbl->action == IL_SISO_SWITCH_MIMO2_AC)
1432 search_tbl->ant_type = ANT_AC;
1433 else
1434 search_tbl->ant_type = ANT_BC;
1435
1436 if (!il4965_rs_is_valid_ant
1437 (valid_tx_ant, search_tbl->ant_type))
1438 break;
1439
1440 ret =
1441 il4965_rs_switch_to_mimo2(il, lq_sta, conf, sta,
1442 search_tbl, idx);
1443 if (!ret)
1444 goto out;
1445 break;
1446 case IL_SISO_SWITCH_GI:
1447 if (!tbl->is_ht40 &&
1448 !(ht_cap->cap & IEEE80211_HT_CAP_SGI_20))
1449 break;
1450 if (tbl->is_ht40 &&
1451 !(ht_cap->cap & IEEE80211_HT_CAP_SGI_40))
1452 break;
1453
1454 D_RATE("LQ: SISO toggle SGI/NGI\n");
1455
1456 memcpy(search_tbl, tbl, sz);
1457 if (is_green) {
1458 if (!tbl->is_SGI)
1459 break;
1460 else
1461 IL_ERR("SGI was set in GF+SISO\n");
1462 }
1463 search_tbl->is_SGI = !tbl->is_SGI;
1464 il4965_rs_set_expected_tpt_table(lq_sta, search_tbl);
1465 if (tbl->is_SGI) {
1466 s32 tpt = lq_sta->last_tpt / 100;
1467 if (tpt >= search_tbl->expected_tpt[idx])
1468 break;
1469 }
1470 search_tbl->current_rate =
1471 il4965_rate_n_flags_from_tbl(il, search_tbl, idx,
1472 is_green);
1473 update_search_tbl_counter = 1;
1474 goto out;
1475 }
1476 tbl->action++;
1477 if (tbl->action > IL_SISO_SWITCH_GI)
1478 tbl->action = IL_SISO_SWITCH_ANTENNA1;
1479
1480 if (tbl->action == start_action)
1481 break;
1482 }
1483 search_tbl->lq_type = LQ_NONE;
1484 return 0;
1485
1486 out:
1487 lq_sta->search_better_tbl = 1;
1488 tbl->action++;
1489 if (tbl->action > IL_SISO_SWITCH_GI)
1490 tbl->action = IL_SISO_SWITCH_ANTENNA1;
1491 if (update_search_tbl_counter)
1492 search_tbl->action = tbl->action;
1493
1494 return 0;
1495 }
1496
1497
1498
1499
1500 static int
1501 il4965_rs_move_mimo2_to_other(struct il_priv *il, struct il_lq_sta *lq_sta,
1502 struct ieee80211_conf *conf,
1503 struct ieee80211_sta *sta, int idx)
1504 {
1505 s8 is_green = lq_sta->is_green;
1506 struct il_scale_tbl_info *tbl = &(lq_sta->lq_info[lq_sta->active_tbl]);
1507 struct il_scale_tbl_info *search_tbl =
1508 &(lq_sta->lq_info[(1 - lq_sta->active_tbl)]);
1509 struct il_rate_scale_data *win = &(tbl->win[idx]);
1510 struct ieee80211_sta_ht_cap *ht_cap = &sta->ht_cap;
1511 u32 sz =
1512 (sizeof(struct il_scale_tbl_info) -
1513 (sizeof(struct il_rate_scale_data) * RATE_COUNT));
1514 u8 start_action;
1515 u8 valid_tx_ant = il->hw_params.valid_tx_ant;
1516 u8 tx_chains_num = il->hw_params.tx_chains_num;
1517 u8 update_search_tbl_counter = 0;
1518 int ret;
1519
1520 start_action = tbl->action;
1521 for (;;) {
1522 lq_sta->action_counter++;
1523 switch (tbl->action) {
1524 case IL_MIMO2_SWITCH_ANTENNA1:
1525 case IL_MIMO2_SWITCH_ANTENNA2:
1526 D_RATE("LQ: MIMO2 toggle Antennas\n");
1527
1528 if (tx_chains_num <= 2)
1529 break;
1530
1531 if (win->success_ratio >= IL_RS_GOOD_RATIO)
1532 break;
1533
1534 memcpy(search_tbl, tbl, sz);
1535 if (il4965_rs_toggle_antenna
1536 (valid_tx_ant, &search_tbl->current_rate,
1537 search_tbl)) {
1538 update_search_tbl_counter = 1;
1539 goto out;
1540 }
1541 break;
1542 case IL_MIMO2_SWITCH_SISO_A:
1543 case IL_MIMO2_SWITCH_SISO_B:
1544 case IL_MIMO2_SWITCH_SISO_C:
1545 D_RATE("LQ: MIMO2 switch to SISO\n");
1546
1547
1548 memcpy(search_tbl, tbl, sz);
1549
1550 if (tbl->action == IL_MIMO2_SWITCH_SISO_A)
1551 search_tbl->ant_type = ANT_A;
1552 else if (tbl->action == IL_MIMO2_SWITCH_SISO_B)
1553 search_tbl->ant_type = ANT_B;
1554 else
1555 search_tbl->ant_type = ANT_C;
1556
1557 if (!il4965_rs_is_valid_ant
1558 (valid_tx_ant, search_tbl->ant_type))
1559 break;
1560
1561 ret =
1562 il4965_rs_switch_to_siso(il, lq_sta, conf, sta,
1563 search_tbl, idx);
1564 if (!ret)
1565 goto out;
1566
1567 break;
1568
1569 case IL_MIMO2_SWITCH_GI:
1570 if (!tbl->is_ht40 &&
1571 !(ht_cap->cap & IEEE80211_HT_CAP_SGI_20))
1572 break;
1573 if (tbl->is_ht40 &&
1574 !(ht_cap->cap & IEEE80211_HT_CAP_SGI_40))
1575 break;
1576
1577 D_RATE("LQ: MIMO2 toggle SGI/NGI\n");
1578
1579
1580 memcpy(search_tbl, tbl, sz);
1581 search_tbl->is_SGI = !tbl->is_SGI;
1582 il4965_rs_set_expected_tpt_table(lq_sta, search_tbl);
1583
1584
1585
1586
1587
1588
1589 if (tbl->is_SGI) {
1590 s32 tpt = lq_sta->last_tpt / 100;
1591 if (tpt >= search_tbl->expected_tpt[idx])
1592 break;
1593 }
1594 search_tbl->current_rate =
1595 il4965_rate_n_flags_from_tbl(il, search_tbl, idx,
1596 is_green);
1597 update_search_tbl_counter = 1;
1598 goto out;
1599
1600 }
1601 tbl->action++;
1602 if (tbl->action > IL_MIMO2_SWITCH_GI)
1603 tbl->action = IL_MIMO2_SWITCH_ANTENNA1;
1604
1605 if (tbl->action == start_action)
1606 break;
1607 }
1608 search_tbl->lq_type = LQ_NONE;
1609 return 0;
1610 out:
1611 lq_sta->search_better_tbl = 1;
1612 tbl->action++;
1613 if (tbl->action > IL_MIMO2_SWITCH_GI)
1614 tbl->action = IL_MIMO2_SWITCH_ANTENNA1;
1615 if (update_search_tbl_counter)
1616 search_tbl->action = tbl->action;
1617
1618 return 0;
1619
1620 }
1621
1622
1623
1624
1625
1626
1627
1628
1629 static void
1630 il4965_rs_stay_in_table(struct il_lq_sta *lq_sta, bool force_search)
1631 {
1632 struct il_scale_tbl_info *tbl;
1633 int i;
1634 int active_tbl;
1635 int flush_interval_passed = 0;
1636 struct il_priv *il;
1637
1638 il = lq_sta->drv;
1639 active_tbl = lq_sta->active_tbl;
1640
1641 tbl = &(lq_sta->lq_info[active_tbl]);
1642
1643
1644 if (lq_sta->stay_in_tbl) {
1645
1646
1647 if (lq_sta->flush_timer)
1648 flush_interval_passed =
1649 time_after(jiffies,
1650 (unsigned long)(lq_sta->flush_timer +
1651 RATE_SCALE_FLUSH_INTVL));
1652
1653
1654
1655
1656
1657
1658
1659
1660
1661 if (force_search ||
1662 lq_sta->total_failed > lq_sta->max_failure_limit ||
1663 lq_sta->total_success > lq_sta->max_success_limit ||
1664 (!lq_sta->search_better_tbl && lq_sta->flush_timer &&
1665 flush_interval_passed)) {
1666 D_RATE("LQ: stay is expired %d %d %d\n",
1667 lq_sta->total_failed, lq_sta->total_success,
1668 flush_interval_passed);
1669
1670
1671 lq_sta->stay_in_tbl = 0;
1672 lq_sta->total_failed = 0;
1673 lq_sta->total_success = 0;
1674 lq_sta->flush_timer = 0;
1675
1676
1677
1678
1679
1680
1681
1682 } else {
1683 lq_sta->table_count++;
1684 if (lq_sta->table_count >= lq_sta->table_count_limit) {
1685 lq_sta->table_count = 0;
1686
1687 D_RATE("LQ: stay in table clear win\n");
1688 for (i = 0; i < RATE_COUNT; i++)
1689 il4965_rs_rate_scale_clear_win(&
1690 (tbl->
1691 win
1692 [i]));
1693 }
1694 }
1695
1696
1697
1698
1699 if (!lq_sta->stay_in_tbl) {
1700 for (i = 0; i < RATE_COUNT; i++)
1701 il4965_rs_rate_scale_clear_win(&(tbl->win[i]));
1702 }
1703 }
1704 }
1705
1706
1707
1708
1709 static void
1710 il4965_rs_update_rate_tbl(struct il_priv *il, struct il_lq_sta *lq_sta,
1711 struct il_scale_tbl_info *tbl, int idx, u8 is_green)
1712 {
1713 u32 rate;
1714
1715
1716 rate = il4965_rate_n_flags_from_tbl(il, tbl, idx, is_green);
1717 il4965_rs_fill_link_cmd(il, lq_sta, rate);
1718 il_send_lq_cmd(il, &lq_sta->lq, CMD_ASYNC, false);
1719 }
1720
1721
1722
1723
1724 static void
1725 il4965_rs_rate_scale_perform(struct il_priv *il, struct sk_buff *skb,
1726 struct ieee80211_sta *sta,
1727 struct il_lq_sta *lq_sta)
1728 {
1729 struct ieee80211_hw *hw = il->hw;
1730 struct ieee80211_conf *conf = &hw->conf;
1731 struct ieee80211_tx_info *info = IEEE80211_SKB_CB(skb);
1732 struct ieee80211_hdr *hdr = (struct ieee80211_hdr *)skb->data;
1733 int low = RATE_INVALID;
1734 int high = RATE_INVALID;
1735 int idx;
1736 int i;
1737 struct il_rate_scale_data *win = NULL;
1738 int current_tpt = IL_INVALID_VALUE;
1739 int low_tpt = IL_INVALID_VALUE;
1740 int high_tpt = IL_INVALID_VALUE;
1741 u32 fail_count;
1742 s8 scale_action = 0;
1743 u16 rate_mask;
1744 u8 update_lq = 0;
1745 struct il_scale_tbl_info *tbl, *tbl1;
1746 u16 rate_scale_idx_msk = 0;
1747 u8 is_green = 0;
1748 u8 active_tbl = 0;
1749 u8 done_search = 0;
1750 u16 high_low;
1751 s32 sr;
1752 u8 tid = MAX_TID_COUNT;
1753 struct il_tid_data *tid_data;
1754
1755 D_RATE("rate scale calculate new rate for skb\n");
1756
1757
1758
1759 if (!ieee80211_is_data(hdr->frame_control) ||
1760 (info->flags & IEEE80211_TX_CTL_NO_ACK))
1761 return;
1762
1763 lq_sta->supp_rates = sta->supp_rates[lq_sta->band];
1764
1765 tid = il4965_rs_tl_add_packet(lq_sta, hdr);
1766 if (tid != MAX_TID_COUNT && (lq_sta->tx_agg_tid_en & (1 << tid))) {
1767 tid_data = &il->stations[lq_sta->lq.sta_id].tid[tid];
1768 if (tid_data->agg.state == IL_AGG_OFF)
1769 lq_sta->is_agg = 0;
1770 else
1771 lq_sta->is_agg = 1;
1772 } else
1773 lq_sta->is_agg = 0;
1774
1775
1776
1777
1778
1779
1780 if (!lq_sta->search_better_tbl)
1781 active_tbl = lq_sta->active_tbl;
1782 else
1783 active_tbl = 1 - lq_sta->active_tbl;
1784
1785 tbl = &(lq_sta->lq_info[active_tbl]);
1786 if (is_legacy(tbl->lq_type))
1787 lq_sta->is_green = 0;
1788 else
1789 lq_sta->is_green = il4965_rs_use_green(il, sta);
1790 is_green = lq_sta->is_green;
1791
1792
1793 idx = lq_sta->last_txrate_idx;
1794
1795 D_RATE("Rate scale idx %d for type %d\n", idx, tbl->lq_type);
1796
1797
1798 rate_mask = il4965_rs_get_supported_rates(lq_sta, hdr, tbl->lq_type);
1799
1800 D_RATE("mask 0x%04X\n", rate_mask);
1801
1802
1803 if (is_legacy(tbl->lq_type)) {
1804 if (lq_sta->band == NL80211_BAND_5GHZ)
1805
1806 rate_scale_idx_msk =
1807 (u16) (rate_mask &
1808 (lq_sta->supp_rates << IL_FIRST_OFDM_RATE));
1809 else
1810 rate_scale_idx_msk =
1811 (u16) (rate_mask & lq_sta->supp_rates);
1812
1813 } else
1814 rate_scale_idx_msk = rate_mask;
1815
1816 if (!rate_scale_idx_msk)
1817 rate_scale_idx_msk = rate_mask;
1818
1819 if (!((1 << idx) & rate_scale_idx_msk)) {
1820 IL_ERR("Current Rate is not valid\n");
1821 if (lq_sta->search_better_tbl) {
1822
1823 tbl->lq_type = LQ_NONE;
1824 lq_sta->search_better_tbl = 0;
1825 tbl = &(lq_sta->lq_info[lq_sta->active_tbl]);
1826
1827 idx = il4965_hwrate_to_plcp_idx(tbl->current_rate);
1828 il4965_rs_update_rate_tbl(il, lq_sta, tbl, idx,
1829 is_green);
1830 }
1831 return;
1832 }
1833
1834
1835 if (!tbl->expected_tpt) {
1836 IL_ERR("tbl->expected_tpt is NULL\n");
1837 return;
1838 }
1839
1840
1841 if (lq_sta->max_rate_idx != -1 && lq_sta->max_rate_idx < idx) {
1842 idx = lq_sta->max_rate_idx;
1843 update_lq = 1;
1844 win = &(tbl->win[idx]);
1845 goto lq_update;
1846 }
1847
1848 win = &(tbl->win[idx]);
1849
1850
1851
1852
1853
1854
1855
1856
1857 fail_count = win->counter - win->success_counter;
1858 if (fail_count < RATE_MIN_FAILURE_TH &&
1859 win->success_counter < RATE_MIN_SUCCESS_TH) {
1860 D_RATE("LQ: still below TH. succ=%d total=%d " "for idx %d\n",
1861 win->success_counter, win->counter, idx);
1862
1863
1864 win->average_tpt = IL_INVALID_VALUE;
1865
1866
1867
1868 il4965_rs_stay_in_table(lq_sta, false);
1869
1870 goto out;
1871 }
1872
1873
1874 if (win->average_tpt !=
1875 ((win->success_ratio * tbl->expected_tpt[idx] + 64) / 128)) {
1876 IL_ERR("expected_tpt should have been calculated by now\n");
1877 win->average_tpt =
1878 ((win->success_ratio * tbl->expected_tpt[idx] + 64) / 128);
1879 }
1880
1881
1882 if (lq_sta->search_better_tbl) {
1883
1884
1885
1886 if (win->average_tpt > lq_sta->last_tpt) {
1887
1888 D_RATE("LQ: SWITCHING TO NEW TBL "
1889 "suc=%d cur-tpt=%d old-tpt=%d\n",
1890 win->success_ratio, win->average_tpt,
1891 lq_sta->last_tpt);
1892
1893 if (!is_legacy(tbl->lq_type))
1894 lq_sta->enable_counter = 1;
1895
1896
1897 lq_sta->active_tbl = active_tbl;
1898 current_tpt = win->average_tpt;
1899
1900
1901 } else {
1902
1903 D_RATE("LQ: GOING BACK TO THE OLD TBL "
1904 "suc=%d cur-tpt=%d old-tpt=%d\n",
1905 win->success_ratio, win->average_tpt,
1906 lq_sta->last_tpt);
1907
1908
1909 tbl->lq_type = LQ_NONE;
1910
1911
1912 active_tbl = lq_sta->active_tbl;
1913 tbl = &(lq_sta->lq_info[active_tbl]);
1914
1915
1916 idx = il4965_hwrate_to_plcp_idx(tbl->current_rate);
1917 current_tpt = lq_sta->last_tpt;
1918
1919
1920 update_lq = 1;
1921 }
1922
1923
1924
1925 lq_sta->search_better_tbl = 0;
1926 done_search = 1;
1927 goto lq_update;
1928 }
1929
1930
1931
1932 high_low =
1933 il4965_rs_get_adjacent_rate(il, idx, rate_scale_idx_msk,
1934 tbl->lq_type);
1935 low = high_low & 0xff;
1936 high = (high_low >> 8) & 0xff;
1937
1938
1939 if (lq_sta->max_rate_idx != -1 && lq_sta->max_rate_idx < high)
1940 high = RATE_INVALID;
1941
1942 sr = win->success_ratio;
1943
1944
1945 current_tpt = win->average_tpt;
1946 if (low != RATE_INVALID)
1947 low_tpt = tbl->win[low].average_tpt;
1948 if (high != RATE_INVALID)
1949 high_tpt = tbl->win[high].average_tpt;
1950
1951 scale_action = 0;
1952
1953
1954 if (sr <= RATE_DECREASE_TH || current_tpt == 0) {
1955 D_RATE("decrease rate because of low success_ratio\n");
1956 scale_action = -1;
1957
1958
1959 } else if (low_tpt == IL_INVALID_VALUE && high_tpt == IL_INVALID_VALUE) {
1960
1961 if (high != RATE_INVALID && sr >= RATE_INCREASE_TH)
1962 scale_action = 1;
1963 else if (low != RATE_INVALID)
1964 scale_action = 0;
1965 }
1966
1967
1968
1969 else if (low_tpt != IL_INVALID_VALUE && high_tpt != IL_INVALID_VALUE &&
1970 low_tpt < current_tpt && high_tpt < current_tpt)
1971 scale_action = 0;
1972
1973
1974
1975 else {
1976
1977 if (high_tpt != IL_INVALID_VALUE) {
1978
1979 if (high_tpt > current_tpt && sr >= RATE_INCREASE_TH)
1980 scale_action = 1;
1981 else
1982 scale_action = 0;
1983
1984
1985 } else if (low_tpt != IL_INVALID_VALUE) {
1986
1987 if (low_tpt > current_tpt) {
1988 D_RATE("decrease rate because of low tpt\n");
1989 scale_action = -1;
1990 } else if (sr >= RATE_INCREASE_TH) {
1991 scale_action = 1;
1992 }
1993 }
1994 }
1995
1996
1997
1998 if (scale_action == -1 && low != RATE_INVALID &&
1999 (sr > RATE_HIGH_TH || current_tpt > 100 * tbl->expected_tpt[low]))
2000 scale_action = 0;
2001
2002 switch (scale_action) {
2003 case -1:
2004
2005 if (low != RATE_INVALID) {
2006 update_lq = 1;
2007 idx = low;
2008 }
2009
2010 break;
2011 case 1:
2012
2013 if (high != RATE_INVALID) {
2014 update_lq = 1;
2015 idx = high;
2016 }
2017
2018 break;
2019 case 0:
2020
2021 default:
2022 break;
2023 }
2024
2025 D_RATE("choose rate scale idx %d action %d low %d " "high %d type %d\n",
2026 idx, scale_action, low, high, tbl->lq_type);
2027
2028 lq_update:
2029
2030 if (update_lq)
2031 il4965_rs_update_rate_tbl(il, lq_sta, tbl, idx, is_green);
2032
2033
2034
2035 il4965_rs_stay_in_table(lq_sta, false);
2036
2037
2038
2039
2040
2041
2042
2043 if (!update_lq && !done_search && !lq_sta->stay_in_tbl && win->counter) {
2044
2045 lq_sta->last_tpt = current_tpt;
2046
2047
2048
2049 if (is_legacy(tbl->lq_type))
2050 il4965_rs_move_legacy_other(il, lq_sta, conf, sta, idx);
2051 else if (is_siso(tbl->lq_type))
2052 il4965_rs_move_siso_to_other(il, lq_sta, conf, sta,
2053 idx);
2054 else
2055 il4965_rs_move_mimo2_to_other(il, lq_sta, conf, sta,
2056 idx);
2057
2058
2059 if (lq_sta->search_better_tbl) {
2060
2061 tbl = &(lq_sta->lq_info[(1 - lq_sta->active_tbl)]);
2062 for (i = 0; i < RATE_COUNT; i++)
2063 il4965_rs_rate_scale_clear_win(&(tbl->win[i]));
2064
2065
2066 idx = il4965_hwrate_to_plcp_idx(tbl->current_rate);
2067
2068 D_RATE("Switch current mcs: %X idx: %d\n",
2069 tbl->current_rate, idx);
2070 il4965_rs_fill_link_cmd(il, lq_sta, tbl->current_rate);
2071 il_send_lq_cmd(il, &lq_sta->lq, CMD_ASYNC, false);
2072 } else
2073 done_search = 1;
2074 }
2075
2076 if (done_search && !lq_sta->stay_in_tbl) {
2077
2078
2079
2080
2081
2082 tbl1 = &(lq_sta->lq_info[lq_sta->active_tbl]);
2083 if (is_legacy(tbl1->lq_type) && !conf_is_ht(conf) &&
2084 lq_sta->action_counter > tbl1->max_search) {
2085 D_RATE("LQ: STAY in legacy table\n");
2086 il4965_rs_set_stay_in_table(il, 1, lq_sta);
2087 }
2088
2089
2090
2091
2092 if (lq_sta->enable_counter &&
2093 lq_sta->action_counter >= tbl1->max_search) {
2094 if (lq_sta->last_tpt > IL_AGG_TPT_THREHOLD &&
2095 (lq_sta->tx_agg_tid_en & (1 << tid)) &&
2096 tid != MAX_TID_COUNT) {
2097 tid_data =
2098 &il->stations[lq_sta->lq.sta_id].tid[tid];
2099 if (tid_data->agg.state == IL_AGG_OFF) {
2100 D_RATE("try to aggregate tid %d\n",
2101 tid);
2102 il4965_rs_tl_turn_on_agg(il, tid,
2103 lq_sta, sta);
2104 }
2105 }
2106 il4965_rs_set_stay_in_table(il, 0, lq_sta);
2107 }
2108 }
2109
2110 out:
2111 tbl->current_rate =
2112 il4965_rate_n_flags_from_tbl(il, tbl, idx, is_green);
2113 i = idx;
2114 lq_sta->last_txrate_idx = i;
2115 }
2116
2117
2118
2119
2120
2121
2122
2123
2124
2125
2126
2127
2128
2129
2130
2131 static void
2132 il4965_rs_initialize_lq(struct il_priv *il, struct ieee80211_conf *conf,
2133 struct ieee80211_sta *sta, struct il_lq_sta *lq_sta)
2134 {
2135 struct il_scale_tbl_info *tbl;
2136 int rate_idx;
2137 int i;
2138 u32 rate;
2139 u8 use_green;
2140 u8 active_tbl = 0;
2141 u8 valid_tx_ant;
2142
2143 if (!sta || !lq_sta)
2144 return;
2145
2146 use_green = il4965_rs_use_green(il, sta);
2147
2148 i = lq_sta->last_txrate_idx;
2149
2150 valid_tx_ant = il->hw_params.valid_tx_ant;
2151
2152 if (!lq_sta->search_better_tbl)
2153 active_tbl = lq_sta->active_tbl;
2154 else
2155 active_tbl = 1 - lq_sta->active_tbl;
2156
2157 tbl = &(lq_sta->lq_info[active_tbl]);
2158
2159 if (i < 0 || i >= RATE_COUNT)
2160 i = 0;
2161
2162 rate = il_rates[i].plcp;
2163 tbl->ant_type = il4965_first_antenna(valid_tx_ant);
2164 rate |= tbl->ant_type << RATE_MCS_ANT_POS;
2165
2166 if (i >= IL_FIRST_CCK_RATE && i <= IL_LAST_CCK_RATE)
2167 rate |= RATE_MCS_CCK_MSK;
2168
2169 il4965_rs_get_tbl_info_from_mcs(rate, il->band, tbl, &rate_idx);
2170 if (!il4965_rs_is_valid_ant(valid_tx_ant, tbl->ant_type))
2171 il4965_rs_toggle_antenna(valid_tx_ant, &rate, tbl);
2172
2173 rate = il4965_rate_n_flags_from_tbl(il, tbl, rate_idx, use_green);
2174 tbl->current_rate = rate;
2175 il4965_rs_set_expected_tpt_table(lq_sta, tbl);
2176 il4965_rs_fill_link_cmd(NULL, lq_sta, rate);
2177 il->stations[lq_sta->lq.sta_id].lq = &lq_sta->lq;
2178 il_send_lq_cmd(il, &lq_sta->lq, CMD_SYNC, true);
2179 }
2180
2181 static void
2182 il4965_rs_get_rate(void *il_r, struct ieee80211_sta *sta, void *il_sta,
2183 struct ieee80211_tx_rate_control *txrc)
2184 {
2185
2186 struct sk_buff *skb = txrc->skb;
2187 struct ieee80211_supported_band *sband = txrc->sband;
2188 struct il_priv *il __maybe_unused = (struct il_priv *)il_r;
2189 struct ieee80211_tx_info *info = IEEE80211_SKB_CB(skb);
2190 struct il_lq_sta *lq_sta = il_sta;
2191 int rate_idx;
2192
2193 D_RATE("rate scale calculate new rate for skb\n");
2194
2195
2196 if (lq_sta) {
2197 lq_sta->max_rate_idx = fls(txrc->rate_idx_mask) - 1;
2198 if (sband->band == NL80211_BAND_5GHZ &&
2199 lq_sta->max_rate_idx != -1)
2200 lq_sta->max_rate_idx += IL_FIRST_OFDM_RATE;
2201 if (lq_sta->max_rate_idx < 0 ||
2202 lq_sta->max_rate_idx >= RATE_COUNT)
2203 lq_sta->max_rate_idx = -1;
2204 }
2205
2206
2207 if (lq_sta && !lq_sta->drv) {
2208 D_RATE("Rate scaling not initialized yet.\n");
2209 il_sta = NULL;
2210 }
2211
2212 if (!lq_sta)
2213 return;
2214
2215 rate_idx = lq_sta->last_txrate_idx;
2216
2217 if (lq_sta->last_rate_n_flags & RATE_MCS_HT_MSK) {
2218 rate_idx -= IL_FIRST_OFDM_RATE;
2219
2220 rate_idx = (rate_idx > 0) ? (rate_idx - 1) : 0;
2221 if (il4965_rs_extract_rate(lq_sta->last_rate_n_flags) >=
2222 RATE_MIMO2_6M_PLCP)
2223 rate_idx = rate_idx + MCS_IDX_PER_STREAM;
2224 info->control.rates[0].flags = IEEE80211_TX_RC_MCS;
2225 if (lq_sta->last_rate_n_flags & RATE_MCS_SGI_MSK)
2226 info->control.rates[0].flags |=
2227 IEEE80211_TX_RC_SHORT_GI;
2228 if (lq_sta->last_rate_n_flags & RATE_MCS_DUP_MSK)
2229 info->control.rates[0].flags |=
2230 IEEE80211_TX_RC_DUP_DATA;
2231 if (lq_sta->last_rate_n_flags & RATE_MCS_HT40_MSK)
2232 info->control.rates[0].flags |=
2233 IEEE80211_TX_RC_40_MHZ_WIDTH;
2234 if (lq_sta->last_rate_n_flags & RATE_MCS_GF_MSK)
2235 info->control.rates[0].flags |=
2236 IEEE80211_TX_RC_GREEN_FIELD;
2237 } else {
2238
2239 if (rate_idx < 0 || rate_idx >= RATE_COUNT_LEGACY ||
2240 (sband->band == NL80211_BAND_5GHZ &&
2241 rate_idx < IL_FIRST_OFDM_RATE))
2242 rate_idx = rate_lowest_index(sband, sta);
2243
2244 else if (sband->band == NL80211_BAND_5GHZ)
2245 rate_idx -= IL_FIRST_OFDM_RATE;
2246 info->control.rates[0].flags = 0;
2247 }
2248 info->control.rates[0].idx = rate_idx;
2249 info->control.rates[0].count = 1;
2250 }
2251
2252 static void *
2253 il4965_rs_alloc_sta(void *il_rate, struct ieee80211_sta *sta, gfp_t gfp)
2254 {
2255 struct il_station_priv *sta_priv =
2256 (struct il_station_priv *)sta->drv_priv;
2257 struct il_priv *il;
2258
2259 il = (struct il_priv *)il_rate;
2260 D_RATE("create station rate scale win\n");
2261
2262 return &sta_priv->lq_sta;
2263 }
2264
2265
2266
2267
2268 void
2269 il4965_rs_rate_init(struct il_priv *il, struct ieee80211_sta *sta, u8 sta_id)
2270 {
2271 int i, j;
2272 struct ieee80211_hw *hw = il->hw;
2273 struct ieee80211_conf *conf = &il->hw->conf;
2274 struct ieee80211_sta_ht_cap *ht_cap = &sta->ht_cap;
2275 struct il_station_priv *sta_priv;
2276 struct il_lq_sta *lq_sta;
2277 struct ieee80211_supported_band *sband;
2278
2279 sta_priv = (struct il_station_priv *)sta->drv_priv;
2280 lq_sta = &sta_priv->lq_sta;
2281 sband = hw->wiphy->bands[conf->chandef.chan->band];
2282
2283 lq_sta->lq.sta_id = sta_id;
2284
2285 for (j = 0; j < LQ_SIZE; j++)
2286 for (i = 0; i < RATE_COUNT; i++)
2287 il4965_rs_rate_scale_clear_win(&lq_sta->lq_info[j].
2288 win[i]);
2289
2290 lq_sta->flush_timer = 0;
2291 lq_sta->supp_rates = sta->supp_rates[sband->band];
2292 for (j = 0; j < LQ_SIZE; j++)
2293 for (i = 0; i < RATE_COUNT; i++)
2294 il4965_rs_rate_scale_clear_win(&lq_sta->lq_info[j].
2295 win[i]);
2296
2297 D_RATE("LQ:" "*** rate scale station global init for station %d ***\n",
2298 sta_id);
2299
2300
2301
2302
2303
2304 lq_sta->is_dup = 0;
2305 lq_sta->max_rate_idx = -1;
2306 lq_sta->missed_rate_counter = IL_MISSED_RATE_MAX;
2307 lq_sta->is_green = il4965_rs_use_green(il, sta);
2308 lq_sta->active_legacy_rate = il->active_rate & ~(0x1000);
2309 lq_sta->band = il->band;
2310
2311
2312
2313
2314 lq_sta->active_siso_rate = ht_cap->mcs.rx_mask[0] << 1;
2315 lq_sta->active_siso_rate |= ht_cap->mcs.rx_mask[0] & 0x1;
2316 lq_sta->active_siso_rate &= ~((u16) 0x2);
2317 lq_sta->active_siso_rate <<= IL_FIRST_OFDM_RATE;
2318
2319
2320 lq_sta->active_mimo2_rate = ht_cap->mcs.rx_mask[1] << 1;
2321 lq_sta->active_mimo2_rate |= ht_cap->mcs.rx_mask[1] & 0x1;
2322 lq_sta->active_mimo2_rate &= ~((u16) 0x2);
2323 lq_sta->active_mimo2_rate <<= IL_FIRST_OFDM_RATE;
2324
2325
2326 lq_sta->lq.general_params.single_stream_ant_msk =
2327 il4965_first_antenna(il->hw_params.valid_tx_ant);
2328 lq_sta->lq.general_params.dual_stream_ant_msk =
2329 il->hw_params.valid_tx_ant & ~il4965_first_antenna(il->hw_params.
2330 valid_tx_ant);
2331 if (!lq_sta->lq.general_params.dual_stream_ant_msk) {
2332 lq_sta->lq.general_params.dual_stream_ant_msk = ANT_AB;
2333 } else if (il4965_num_of_ant(il->hw_params.valid_tx_ant) == 2) {
2334 lq_sta->lq.general_params.dual_stream_ant_msk =
2335 il->hw_params.valid_tx_ant;
2336 }
2337
2338
2339 lq_sta->tx_agg_tid_en = IL_AGG_ALL_TID;
2340 lq_sta->drv = il;
2341
2342
2343 lq_sta->last_txrate_idx = rate_lowest_index(sband, sta);
2344 if (sband->band == NL80211_BAND_5GHZ)
2345 lq_sta->last_txrate_idx += IL_FIRST_OFDM_RATE;
2346 lq_sta->is_agg = 0;
2347
2348 #ifdef CONFIG_MAC80211_DEBUGFS
2349 lq_sta->dbg_fixed_rate = 0;
2350 #endif
2351
2352 il4965_rs_initialize_lq(il, conf, sta, lq_sta);
2353 }
2354
2355 static void
2356 il4965_rs_fill_link_cmd(struct il_priv *il, struct il_lq_sta *lq_sta,
2357 u32 new_rate)
2358 {
2359 struct il_scale_tbl_info tbl_type;
2360 int idx = 0;
2361 int rate_idx;
2362 int repeat_rate = 0;
2363 u8 ant_toggle_cnt = 0;
2364 u8 use_ht_possible = 1;
2365 u8 valid_tx_ant = 0;
2366 struct il_link_quality_cmd *lq_cmd = &lq_sta->lq;
2367
2368
2369 il4965_rs_dbgfs_set_mcs(lq_sta, &new_rate, idx);
2370
2371
2372 il4965_rs_get_tbl_info_from_mcs(new_rate, lq_sta->band, &tbl_type,
2373 &rate_idx);
2374
2375
2376 if (is_legacy(tbl_type.lq_type)) {
2377 ant_toggle_cnt = 1;
2378 repeat_rate = IL_NUMBER_TRY;
2379 } else {
2380 repeat_rate = IL_HT_NUMBER_TRY;
2381 }
2382
2383 lq_cmd->general_params.mimo_delimiter =
2384 is_mimo(tbl_type.lq_type) ? 1 : 0;
2385
2386
2387 lq_cmd->rs_table[idx].rate_n_flags = cpu_to_le32(new_rate);
2388
2389 if (il4965_num_of_ant(tbl_type.ant_type) == 1) {
2390 lq_cmd->general_params.single_stream_ant_msk =
2391 tbl_type.ant_type;
2392 } else if (il4965_num_of_ant(tbl_type.ant_type) == 2) {
2393 lq_cmd->general_params.dual_stream_ant_msk = tbl_type.ant_type;
2394 }
2395
2396 idx++;
2397 repeat_rate--;
2398 if (il)
2399 valid_tx_ant = il->hw_params.valid_tx_ant;
2400
2401
2402 while (idx < LINK_QUAL_MAX_RETRY_NUM) {
2403
2404
2405
2406 while (repeat_rate > 0 && idx < LINK_QUAL_MAX_RETRY_NUM) {
2407 if (is_legacy(tbl_type.lq_type)) {
2408 if (ant_toggle_cnt < NUM_TRY_BEFORE_ANT_TOGGLE)
2409 ant_toggle_cnt++;
2410 else if (il &&
2411 il4965_rs_toggle_antenna(valid_tx_ant,
2412 &new_rate,
2413 &tbl_type))
2414 ant_toggle_cnt = 1;
2415 }
2416
2417
2418 il4965_rs_dbgfs_set_mcs(lq_sta, &new_rate, idx);
2419
2420
2421 lq_cmd->rs_table[idx].rate_n_flags =
2422 cpu_to_le32(new_rate);
2423 repeat_rate--;
2424 idx++;
2425 }
2426
2427 il4965_rs_get_tbl_info_from_mcs(new_rate, lq_sta->band,
2428 &tbl_type, &rate_idx);
2429
2430
2431
2432
2433 if (is_mimo(tbl_type.lq_type))
2434 lq_cmd->general_params.mimo_delimiter = idx;
2435
2436
2437 new_rate =
2438 il4965_rs_get_lower_rate(lq_sta, &tbl_type, rate_idx,
2439 use_ht_possible);
2440
2441
2442 if (is_legacy(tbl_type.lq_type)) {
2443 if (ant_toggle_cnt < NUM_TRY_BEFORE_ANT_TOGGLE)
2444 ant_toggle_cnt++;
2445 else if (il &&
2446 il4965_rs_toggle_antenna(valid_tx_ant,
2447 &new_rate, &tbl_type))
2448 ant_toggle_cnt = 1;
2449
2450 repeat_rate = IL_NUMBER_TRY;
2451 } else {
2452 repeat_rate = IL_HT_NUMBER_TRY;
2453 }
2454
2455
2456
2457 use_ht_possible = 0;
2458
2459
2460 il4965_rs_dbgfs_set_mcs(lq_sta, &new_rate, idx);
2461
2462
2463 lq_cmd->rs_table[idx].rate_n_flags = cpu_to_le32(new_rate);
2464
2465 idx++;
2466 repeat_rate--;
2467 }
2468
2469 lq_cmd->agg_params.agg_frame_cnt_limit = LINK_QUAL_AGG_FRAME_LIMIT_DEF;
2470 lq_cmd->agg_params.agg_dis_start_th = LINK_QUAL_AGG_DISABLE_START_DEF;
2471
2472 lq_cmd->agg_params.agg_time_limit =
2473 cpu_to_le16(LINK_QUAL_AGG_TIME_LIMIT_DEF);
2474 }
2475
2476 static void *
2477 il4965_rs_alloc(struct ieee80211_hw *hw)
2478 {
2479 return hw->priv;
2480 }
2481
2482
2483 static void
2484 il4965_rs_free(void *il_rate)
2485 {
2486 return;
2487 }
2488
2489 static void
2490 il4965_rs_free_sta(void *il_r, struct ieee80211_sta *sta, void *il_sta)
2491 {
2492 struct il_priv *il __maybe_unused = il_r;
2493
2494 D_RATE("enter\n");
2495 D_RATE("leave\n");
2496 }
2497
2498 #ifdef CONFIG_MAC80211_DEBUGFS
2499
2500 static void
2501 il4965_rs_dbgfs_set_mcs(struct il_lq_sta *lq_sta, u32 * rate_n_flags, int idx)
2502 {
2503 struct il_priv *il;
2504 u8 valid_tx_ant;
2505 u8 ant_sel_tx;
2506
2507 il = lq_sta->drv;
2508 valid_tx_ant = il->hw_params.valid_tx_ant;
2509 if (lq_sta->dbg_fixed_rate) {
2510 ant_sel_tx =
2511 ((lq_sta->
2512 dbg_fixed_rate & RATE_MCS_ANT_ABC_MSK) >>
2513 RATE_MCS_ANT_POS);
2514 if ((valid_tx_ant & ant_sel_tx) == ant_sel_tx) {
2515 *rate_n_flags = lq_sta->dbg_fixed_rate;
2516 D_RATE("Fixed rate ON\n");
2517 } else {
2518 lq_sta->dbg_fixed_rate = 0;
2519 IL_ERR
2520 ("Invalid antenna selection 0x%X, Valid is 0x%X\n",
2521 ant_sel_tx, valid_tx_ant);
2522 D_RATE("Fixed rate OFF\n");
2523 }
2524 } else {
2525 D_RATE("Fixed rate OFF\n");
2526 }
2527 }
2528
2529 static ssize_t
2530 il4965_rs_sta_dbgfs_scale_table_write(struct file *file,
2531 const char __user *user_buf,
2532 size_t count, loff_t *ppos)
2533 {
2534 struct il_lq_sta *lq_sta = file->private_data;
2535 struct il_priv *il;
2536 char buf[64];
2537 size_t buf_size;
2538 u32 parsed_rate;
2539
2540 il = lq_sta->drv;
2541 memset(buf, 0, sizeof(buf));
2542 buf_size = min(count, sizeof(buf) - 1);
2543 if (copy_from_user(buf, user_buf, buf_size))
2544 return -EFAULT;
2545
2546 if (sscanf(buf, "%x", &parsed_rate) == 1)
2547 lq_sta->dbg_fixed_rate = parsed_rate;
2548 else
2549 lq_sta->dbg_fixed_rate = 0;
2550
2551 lq_sta->active_legacy_rate = 0x0FFF;
2552 lq_sta->active_siso_rate = 0x1FD0;
2553 lq_sta->active_mimo2_rate = 0x1FD0;
2554
2555 D_RATE("sta_id %d rate 0x%X\n", lq_sta->lq.sta_id,
2556 lq_sta->dbg_fixed_rate);
2557
2558 if (lq_sta->dbg_fixed_rate) {
2559 il4965_rs_fill_link_cmd(NULL, lq_sta, lq_sta->dbg_fixed_rate);
2560 il_send_lq_cmd(lq_sta->drv, &lq_sta->lq, CMD_ASYNC, false);
2561 }
2562
2563 return count;
2564 }
2565
2566 static ssize_t
2567 il4965_rs_sta_dbgfs_scale_table_read(struct file *file, char __user *user_buf,
2568 size_t count, loff_t *ppos)
2569 {
2570 char *buff;
2571 int desc = 0;
2572 int i = 0;
2573 int idx = 0;
2574 ssize_t ret;
2575
2576 struct il_lq_sta *lq_sta = file->private_data;
2577 struct il_priv *il;
2578 struct il_scale_tbl_info *tbl = &(lq_sta->lq_info[lq_sta->active_tbl]);
2579
2580 il = lq_sta->drv;
2581 buff = kmalloc(1024, GFP_KERNEL);
2582 if (!buff)
2583 return -ENOMEM;
2584
2585 desc += sprintf(buff + desc, "sta_id %d\n", lq_sta->lq.sta_id);
2586 desc +=
2587 sprintf(buff + desc, "failed=%d success=%d rate=0%X\n",
2588 lq_sta->total_failed, lq_sta->total_success,
2589 lq_sta->active_legacy_rate);
2590 desc +=
2591 sprintf(buff + desc, "fixed rate 0x%X\n", lq_sta->dbg_fixed_rate);
2592 desc +=
2593 sprintf(buff + desc, "valid_tx_ant %s%s%s\n",
2594 (il->hw_params.valid_tx_ant & ANT_A) ? "ANT_A," : "",
2595 (il->hw_params.valid_tx_ant & ANT_B) ? "ANT_B," : "",
2596 (il->hw_params.valid_tx_ant & ANT_C) ? "ANT_C" : "");
2597 desc +=
2598 sprintf(buff + desc, "lq type %s\n",
2599 (is_legacy(tbl->lq_type)) ? "legacy" : "HT");
2600 if (is_Ht(tbl->lq_type)) {
2601 desc +=
2602 sprintf(buff + desc, " %s",
2603 (is_siso(tbl->lq_type)) ? "SISO" : "MIMO2");
2604 desc +=
2605 sprintf(buff + desc, " %s",
2606 (tbl->is_ht40) ? "40MHz" : "20MHz");
2607 desc +=
2608 sprintf(buff + desc, " %s %s %s\n",
2609 (tbl->is_SGI) ? "SGI" : "",
2610 (lq_sta->is_green) ? "GF enabled" : "",
2611 (lq_sta->is_agg) ? "AGG on" : "");
2612 }
2613 desc +=
2614 sprintf(buff + desc, "last tx rate=0x%X\n",
2615 lq_sta->last_rate_n_flags);
2616 desc +=
2617 sprintf(buff + desc,
2618 "general:" "flags=0x%X mimo-d=%d s-ant0x%x d-ant=0x%x\n",
2619 lq_sta->lq.general_params.flags,
2620 lq_sta->lq.general_params.mimo_delimiter,
2621 lq_sta->lq.general_params.single_stream_ant_msk,
2622 lq_sta->lq.general_params.dual_stream_ant_msk);
2623
2624 desc +=
2625 sprintf(buff + desc,
2626 "agg:"
2627 "time_limit=%d dist_start_th=%d frame_cnt_limit=%d\n",
2628 le16_to_cpu(lq_sta->lq.agg_params.agg_time_limit),
2629 lq_sta->lq.agg_params.agg_dis_start_th,
2630 lq_sta->lq.agg_params.agg_frame_cnt_limit);
2631
2632 desc +=
2633 sprintf(buff + desc,
2634 "Start idx [0]=0x%x [1]=0x%x [2]=0x%x [3]=0x%x\n",
2635 lq_sta->lq.general_params.start_rate_idx[0],
2636 lq_sta->lq.general_params.start_rate_idx[1],
2637 lq_sta->lq.general_params.start_rate_idx[2],
2638 lq_sta->lq.general_params.start_rate_idx[3]);
2639
2640 for (i = 0; i < LINK_QUAL_MAX_RETRY_NUM; i++) {
2641 idx =
2642 il4965_hwrate_to_plcp_idx(le32_to_cpu
2643 (lq_sta->lq.rs_table[i].
2644 rate_n_flags));
2645 if (is_legacy(tbl->lq_type)) {
2646 desc +=
2647 sprintf(buff + desc, " rate[%d] 0x%X %smbps\n", i,
2648 le32_to_cpu(lq_sta->lq.rs_table[i].
2649 rate_n_flags),
2650 il_rate_mcs[idx].mbps);
2651 } else {
2652 desc +=
2653 sprintf(buff + desc, " rate[%d] 0x%X %smbps (%s)\n",
2654 i,
2655 le32_to_cpu(lq_sta->lq.rs_table[i].
2656 rate_n_flags),
2657 il_rate_mcs[idx].mbps,
2658 il_rate_mcs[idx].mcs);
2659 }
2660 }
2661
2662 ret = simple_read_from_buffer(user_buf, count, ppos, buff, desc);
2663 kfree(buff);
2664 return ret;
2665 }
2666
2667 static const struct file_operations rs_sta_dbgfs_scale_table_ops = {
2668 .write = il4965_rs_sta_dbgfs_scale_table_write,
2669 .read = il4965_rs_sta_dbgfs_scale_table_read,
2670 .open = simple_open,
2671 .llseek = default_llseek,
2672 };
2673
2674 static ssize_t
2675 il4965_rs_sta_dbgfs_stats_table_read(struct file *file, char __user *user_buf,
2676 size_t count, loff_t *ppos)
2677 {
2678 char *buff;
2679 int desc = 0;
2680 int i, j;
2681 ssize_t ret;
2682
2683 struct il_lq_sta *lq_sta = file->private_data;
2684
2685 buff = kmalloc(1024, GFP_KERNEL);
2686 if (!buff)
2687 return -ENOMEM;
2688
2689 for (i = 0; i < LQ_SIZE; i++) {
2690 desc +=
2691 sprintf(buff + desc,
2692 "%s type=%d SGI=%d HT40=%d DUP=%d GF=%d\n"
2693 "rate=0x%X\n", lq_sta->active_tbl == i ? "*" : "x",
2694 lq_sta->lq_info[i].lq_type,
2695 lq_sta->lq_info[i].is_SGI,
2696 lq_sta->lq_info[i].is_ht40,
2697 lq_sta->lq_info[i].is_dup, lq_sta->is_green,
2698 lq_sta->lq_info[i].current_rate);
2699 for (j = 0; j < RATE_COUNT; j++) {
2700 desc +=
2701 sprintf(buff + desc,
2702 "counter=%d success=%d %%=%d\n",
2703 lq_sta->lq_info[i].win[j].counter,
2704 lq_sta->lq_info[i].win[j].success_counter,
2705 lq_sta->lq_info[i].win[j].success_ratio);
2706 }
2707 }
2708 ret = simple_read_from_buffer(user_buf, count, ppos, buff, desc);
2709 kfree(buff);
2710 return ret;
2711 }
2712
2713 static const struct file_operations rs_sta_dbgfs_stats_table_ops = {
2714 .read = il4965_rs_sta_dbgfs_stats_table_read,
2715 .open = simple_open,
2716 .llseek = default_llseek,
2717 };
2718
2719 static ssize_t
2720 il4965_rs_sta_dbgfs_rate_scale_data_read(struct file *file,
2721 char __user *user_buf, size_t count,
2722 loff_t *ppos)
2723 {
2724 char buff[120];
2725 int desc = 0;
2726 struct il_lq_sta *lq_sta = file->private_data;
2727 struct il_scale_tbl_info *tbl = &lq_sta->lq_info[lq_sta->active_tbl];
2728
2729 if (is_Ht(tbl->lq_type))
2730 desc +=
2731 sprintf(buff + desc, "Bit Rate= %d Mb/s\n",
2732 tbl->expected_tpt[lq_sta->last_txrate_idx]);
2733 else
2734 desc +=
2735 sprintf(buff + desc, "Bit Rate= %d Mb/s\n",
2736 il_rates[lq_sta->last_txrate_idx].ieee >> 1);
2737
2738 return simple_read_from_buffer(user_buf, count, ppos, buff, desc);
2739 }
2740
2741 static const struct file_operations rs_sta_dbgfs_rate_scale_data_ops = {
2742 .read = il4965_rs_sta_dbgfs_rate_scale_data_read,
2743 .open = simple_open,
2744 .llseek = default_llseek,
2745 };
2746
2747 static void
2748 il4965_rs_add_debugfs(void *il, void *il_sta, struct dentry *dir)
2749 {
2750 struct il_lq_sta *lq_sta = il_sta;
2751
2752 debugfs_create_file("rate_scale_table", 0600, dir, lq_sta,
2753 &rs_sta_dbgfs_scale_table_ops);
2754 debugfs_create_file("rate_stats_table", 0400, dir, lq_sta,
2755 &rs_sta_dbgfs_stats_table_ops);
2756 debugfs_create_file("rate_scale_data", 0400, dir, lq_sta,
2757 &rs_sta_dbgfs_rate_scale_data_ops);
2758 debugfs_create_u8("tx_agg_tid_enable", 0600, dir,
2759 &lq_sta->tx_agg_tid_en);
2760 }
2761 #endif
2762
2763
2764
2765
2766
2767
2768 static void
2769 il4965_rs_rate_init_stub(void *il_r, struct ieee80211_supported_band *sband,
2770 struct cfg80211_chan_def *chandef,
2771 struct ieee80211_sta *sta, void *il_sta)
2772 {
2773 }
2774
2775 static const struct rate_control_ops rs_4965_ops = {
2776 .name = IL4965_RS_NAME,
2777 .tx_status = il4965_rs_tx_status,
2778 .get_rate = il4965_rs_get_rate,
2779 .rate_init = il4965_rs_rate_init_stub,
2780 .alloc = il4965_rs_alloc,
2781 .free = il4965_rs_free,
2782 .alloc_sta = il4965_rs_alloc_sta,
2783 .free_sta = il4965_rs_free_sta,
2784 #ifdef CONFIG_MAC80211_DEBUGFS
2785 .add_sta_debugfs = il4965_rs_add_debugfs,
2786 #endif
2787 };
2788
2789 int
2790 il4965_rate_control_register(void)
2791 {
2792 return ieee80211_rate_control_register(&rs_4965_ops);
2793 }
2794
2795 void
2796 il4965_rate_control_unregister(void)
2797 {
2798 ieee80211_rate_control_unregister(&rs_4965_ops);
2799 }