1 /******************************************************************************
3 * Copyright(c) 2005 - 2014 Intel Corporation. All rights reserved.
5 * This program is free software; you can redistribute it and/or modify it
6 * under the terms of version 2 of the GNU General Public License as
7 * published by the Free Software Foundation.
9 * This program is distributed in the hope that it will be useful, but WITHOUT
10 * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
11 * FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License for
14 * You should have received a copy of the GNU General Public License along with
15 * this program; if not, write to the Free Software Foundation, Inc.,
16 * 51 Franklin Street, Fifth Floor, Boston, MA 02110, USA
18 * The full GNU General Public License is included in this distribution in the
19 * file called LICENSE.
21 * Contact Information:
22 * Intel Linux Wireless <ilw@linux.intel.com>
23 * Intel Corporation, 5200 N.E. Elam Young Parkway, Hillsboro, OR 97124-6497
25 *****************************************************************************/
26 #include <linux/kernel.h>
27 #include <linux/skbuff.h>
28 #include <linux/slab.h>
29 #include <net/mac80211.h>
31 #include <linux/netdevice.h>
32 #include <linux/etherdevice.h>
33 #include <linux/delay.h>
35 #include <linux/workqueue.h>
39 #include "iwl-op-mode.h"
42 #define RS_NAME "iwl-mvm-rs"
44 #define NUM_TRY_BEFORE_ANT_TOGGLE 1
45 #define RS_LEGACY_RETRIES_PER_RATE 1
46 #define RS_HT_VHT_RETRIES_PER_RATE 2
47 #define RS_HT_VHT_RETRIES_PER_RATE_TW 1
48 #define RS_INITIAL_MIMO_NUM_RATES 3
49 #define RS_INITIAL_SISO_NUM_RATES 3
50 #define RS_INITIAL_LEGACY_NUM_RATES LINK_QUAL_MAX_RETRY_NUM
51 #define RS_SECONDARY_LEGACY_NUM_RATES LINK_QUAL_MAX_RETRY_NUM
52 #define RS_SECONDARY_SISO_NUM_RATES 3
53 #define RS_SECONDARY_SISO_RETRIES 1
55 #define IWL_RATE_MAX_WINDOW 62 /* # tx in history window */
56 #define IWL_RATE_MIN_FAILURE_TH 3 /* min failures to calc tpt */
57 #define IWL_RATE_MIN_SUCCESS_TH 8 /* min successes to calc tpt */
59 /* max allowed rate miss before sync LQ cmd */
60 #define IWL_MISSED_RATE_MAX 15
61 #define RS_STAY_IN_COLUMN_TIMEOUT (5*HZ)
62 #define RS_IDLE_TIMEOUT (5*HZ)
64 static u8 rs_ht_to_legacy
[] = {
65 [IWL_RATE_MCS_0_INDEX
] = IWL_RATE_6M_INDEX
,
66 [IWL_RATE_MCS_1_INDEX
] = IWL_RATE_9M_INDEX
,
67 [IWL_RATE_MCS_2_INDEX
] = IWL_RATE_12M_INDEX
,
68 [IWL_RATE_MCS_3_INDEX
] = IWL_RATE_18M_INDEX
,
69 [IWL_RATE_MCS_4_INDEX
] = IWL_RATE_24M_INDEX
,
70 [IWL_RATE_MCS_5_INDEX
] = IWL_RATE_36M_INDEX
,
71 [IWL_RATE_MCS_6_INDEX
] = IWL_RATE_48M_INDEX
,
72 [IWL_RATE_MCS_7_INDEX
] = IWL_RATE_54M_INDEX
,
73 [IWL_RATE_MCS_8_INDEX
] = IWL_RATE_54M_INDEX
,
74 [IWL_RATE_MCS_9_INDEX
] = IWL_RATE_54M_INDEX
,
77 static const u8 ant_toggle_lookup
[] = {
78 [ANT_NONE
] = ANT_NONE
,
88 #define IWL_DECLARE_RATE_INFO(r, s, rp, rn) \
89 [IWL_RATE_##r##M_INDEX] = { IWL_RATE_##r##M_PLCP, \
90 IWL_RATE_HT_SISO_MCS_##s##_PLCP, \
91 IWL_RATE_HT_MIMO2_MCS_##s##_PLCP, \
92 IWL_RATE_VHT_SISO_MCS_##s##_PLCP, \
93 IWL_RATE_VHT_MIMO2_MCS_##s##_PLCP,\
94 IWL_RATE_##rp##M_INDEX, \
95 IWL_RATE_##rn##M_INDEX }
97 #define IWL_DECLARE_MCS_RATE(s) \
98 [IWL_RATE_MCS_##s##_INDEX] = { IWL_RATE_INVM_PLCP, \
99 IWL_RATE_HT_SISO_MCS_##s##_PLCP, \
100 IWL_RATE_HT_MIMO2_MCS_##s##_PLCP, \
101 IWL_RATE_VHT_SISO_MCS_##s##_PLCP, \
102 IWL_RATE_VHT_MIMO2_MCS_##s##_PLCP, \
103 IWL_RATE_INVM_INDEX, \
104 IWL_RATE_INVM_INDEX }
108 * rate, ht rate, prev rate, next rate
110 * If there isn't a valid next or previous rate then INV is used which
111 * maps to IWL_RATE_INVALID
114 static const struct iwl_rs_rate_info iwl_rates
[IWL_RATE_COUNT
] = {
115 IWL_DECLARE_RATE_INFO(1, INV
, INV
, 2), /* 1mbps */
116 IWL_DECLARE_RATE_INFO(2, INV
, 1, 5), /* 2mbps */
117 IWL_DECLARE_RATE_INFO(5, INV
, 2, 11), /*5.5mbps */
118 IWL_DECLARE_RATE_INFO(11, INV
, 9, 12), /* 11mbps */
119 IWL_DECLARE_RATE_INFO(6, 0, 5, 11), /* 6mbps ; MCS 0 */
120 IWL_DECLARE_RATE_INFO(9, INV
, 6, 11), /* 9mbps */
121 IWL_DECLARE_RATE_INFO(12, 1, 11, 18), /* 12mbps ; MCS 1 */
122 IWL_DECLARE_RATE_INFO(18, 2, 12, 24), /* 18mbps ; MCS 2 */
123 IWL_DECLARE_RATE_INFO(24, 3, 18, 36), /* 24mbps ; MCS 3 */
124 IWL_DECLARE_RATE_INFO(36, 4, 24, 48), /* 36mbps ; MCS 4 */
125 IWL_DECLARE_RATE_INFO(48, 5, 36, 54), /* 48mbps ; MCS 5 */
126 IWL_DECLARE_RATE_INFO(54, 6, 48, INV
), /* 54mbps ; MCS 6 */
127 IWL_DECLARE_MCS_RATE(7), /* MCS 7 */
128 IWL_DECLARE_MCS_RATE(8), /* MCS 8 */
129 IWL_DECLARE_MCS_RATE(9), /* MCS 9 */
134 RS_ACTION_DOWNSCALE
= -1,
135 RS_ACTION_UPSCALE
= 1,
138 enum rs_column_mode
{
145 #define MAX_NEXT_COLUMNS 7
146 #define MAX_COLUMN_CHECKS 3
148 typedef bool (*allow_column_func_t
) (struct iwl_mvm
*mvm
,
149 struct ieee80211_sta
*sta
,
150 struct iwl_scale_tbl_info
*tbl
);
152 struct rs_tx_column
{
153 enum rs_column_mode mode
;
156 enum rs_column next_columns
[MAX_NEXT_COLUMNS
];
157 allow_column_func_t checks
[MAX_COLUMN_CHECKS
];
160 static bool rs_mimo_allow(struct iwl_mvm
*mvm
, struct ieee80211_sta
*sta
,
161 struct iwl_scale_tbl_info
*tbl
)
163 if (!sta
->ht_cap
.ht_supported
)
166 if (sta
->smps_mode
== IEEE80211_SMPS_STATIC
)
169 if (num_of_ant(mvm
->fw
->valid_tx_ant
) < 2)
172 if (!iwl_mvm_bt_coex_is_mimo_allowed(mvm
, sta
))
178 static bool rs_siso_allow(struct iwl_mvm
*mvm
, struct ieee80211_sta
*sta
,
179 struct iwl_scale_tbl_info
*tbl
)
181 if (!sta
->ht_cap
.ht_supported
)
187 static bool rs_sgi_allow(struct iwl_mvm
*mvm
, struct ieee80211_sta
*sta
,
188 struct iwl_scale_tbl_info
*tbl
)
190 struct rs_rate
*rate
= &tbl
->rate
;
191 struct ieee80211_sta_ht_cap
*ht_cap
= &sta
->ht_cap
;
192 struct ieee80211_sta_vht_cap
*vht_cap
= &sta
->vht_cap
;
194 if (is_ht20(rate
) && (ht_cap
->cap
&
195 IEEE80211_HT_CAP_SGI_20
))
197 if (is_ht40(rate
) && (ht_cap
->cap
&
198 IEEE80211_HT_CAP_SGI_40
))
200 if (is_ht80(rate
) && (vht_cap
->cap
&
201 IEEE80211_VHT_CAP_SHORT_GI_80
))
207 static const struct rs_tx_column rs_tx_columns
[] = {
208 [RS_COLUMN_LEGACY_ANT_A
] = {
212 RS_COLUMN_LEGACY_ANT_B
,
213 RS_COLUMN_SISO_ANT_A
,
221 [RS_COLUMN_LEGACY_ANT_B
] = {
225 RS_COLUMN_LEGACY_ANT_A
,
226 RS_COLUMN_SISO_ANT_B
,
234 [RS_COLUMN_SISO_ANT_A
] = {
238 RS_COLUMN_SISO_ANT_B
,
240 RS_COLUMN_SISO_ANT_A_SGI
,
241 RS_COLUMN_LEGACY_ANT_A
,
242 RS_COLUMN_LEGACY_ANT_B
,
250 [RS_COLUMN_SISO_ANT_B
] = {
254 RS_COLUMN_SISO_ANT_A
,
256 RS_COLUMN_SISO_ANT_B_SGI
,
257 RS_COLUMN_LEGACY_ANT_A
,
258 RS_COLUMN_LEGACY_ANT_B
,
266 [RS_COLUMN_SISO_ANT_A_SGI
] = {
271 RS_COLUMN_SISO_ANT_B_SGI
,
273 RS_COLUMN_SISO_ANT_A
,
274 RS_COLUMN_LEGACY_ANT_A
,
275 RS_COLUMN_LEGACY_ANT_B
,
284 [RS_COLUMN_SISO_ANT_B_SGI
] = {
289 RS_COLUMN_SISO_ANT_A_SGI
,
291 RS_COLUMN_SISO_ANT_B
,
292 RS_COLUMN_LEGACY_ANT_A
,
293 RS_COLUMN_LEGACY_ANT_B
,
302 [RS_COLUMN_MIMO2
] = {
306 RS_COLUMN_SISO_ANT_A
,
308 RS_COLUMN_LEGACY_ANT_A
,
309 RS_COLUMN_LEGACY_ANT_B
,
318 [RS_COLUMN_MIMO2_SGI
] = {
323 RS_COLUMN_SISO_ANT_A_SGI
,
325 RS_COLUMN_LEGACY_ANT_A
,
326 RS_COLUMN_LEGACY_ANT_B
,
338 static inline u8
rs_extract_rate(u32 rate_n_flags
)
340 /* also works for HT because bits 7:6 are zero there */
341 return (u8
)(rate_n_flags
& RATE_LEGACY_RATE_MSK
);
344 static int iwl_hwrate_to_plcp_idx(u32 rate_n_flags
)
348 if (rate_n_flags
& RATE_MCS_HT_MSK
) {
349 idx
= rate_n_flags
& RATE_HT_MCS_RATE_CODE_MSK
;
350 idx
+= IWL_RATE_MCS_0_INDEX
;
352 /* skip 9M not supported in HT*/
353 if (idx
>= IWL_RATE_9M_INDEX
)
355 if ((idx
>= IWL_FIRST_HT_RATE
) && (idx
<= IWL_LAST_HT_RATE
))
357 } else if (rate_n_flags
& RATE_MCS_VHT_MSK
) {
358 idx
= rate_n_flags
& RATE_VHT_MCS_RATE_CODE_MSK
;
359 idx
+= IWL_RATE_MCS_0_INDEX
;
361 /* skip 9M not supported in VHT*/
362 if (idx
>= IWL_RATE_9M_INDEX
)
364 if ((idx
>= IWL_FIRST_VHT_RATE
) && (idx
<= IWL_LAST_VHT_RATE
))
367 /* legacy rate format, search for match in table */
369 u8 legacy_rate
= rs_extract_rate(rate_n_flags
);
370 for (idx
= 0; idx
< ARRAY_SIZE(iwl_rates
); idx
++)
371 if (iwl_rates
[idx
].plcp
== legacy_rate
)
375 return IWL_RATE_INVALID
;
378 static void rs_rate_scale_perform(struct iwl_mvm
*mvm
,
380 struct ieee80211_sta
*sta
,
381 struct iwl_lq_sta
*lq_sta
);
382 static void rs_fill_lq_cmd(struct iwl_mvm
*mvm
,
383 struct ieee80211_sta
*sta
,
384 struct iwl_lq_sta
*lq_sta
,
385 const struct rs_rate
*initial_rate
);
386 static void rs_stay_in_table(struct iwl_lq_sta
*lq_sta
, bool force_search
);
389 * The following tables contain the expected throughput metrics for all rates
391 * 1, 2, 5.5, 11, 6, 9, 12, 18, 24, 36, 48, 54, 60 MBits
393 * where invalid entries are zeros.
395 * CCK rates are only valid in legacy table and will only be used in G
399 static const u16 expected_tpt_legacy
[IWL_RATE_COUNT
] = {
400 7, 13, 35, 58, 40, 57, 72, 98, 121, 154, 177, 186, 0, 0, 0
403 /* Expected TpT tables. 4 indexes:
404 * 0 - NGI, 1 - SGI, 2 - AGG+NGI, 3 - AGG+SGI
406 static const u16 expected_tpt_siso_20MHz
[4][IWL_RATE_COUNT
] = {
407 {0, 0, 0, 0, 42, 0, 76, 102, 124, 159, 183, 193, 202, 216, 0},
408 {0, 0, 0, 0, 46, 0, 82, 110, 132, 168, 192, 202, 210, 225, 0},
409 {0, 0, 0, 0, 49, 0, 97, 145, 192, 285, 375, 420, 464, 551, 0},
410 {0, 0, 0, 0, 54, 0, 108, 160, 213, 315, 415, 465, 513, 608, 0},
413 static const u16 expected_tpt_siso_40MHz
[4][IWL_RATE_COUNT
] = {
414 {0, 0, 0, 0, 77, 0, 127, 160, 184, 220, 242, 250, 257, 269, 275},
415 {0, 0, 0, 0, 83, 0, 135, 169, 193, 229, 250, 257, 264, 275, 280},
416 {0, 0, 0, 0, 101, 0, 199, 295, 389, 570, 744, 828, 911, 1070, 1173},
417 {0, 0, 0, 0, 112, 0, 220, 326, 429, 629, 819, 912, 1000, 1173, 1284},
420 static const u16 expected_tpt_siso_80MHz
[4][IWL_RATE_COUNT
] = {
421 {0, 0, 0, 0, 130, 0, 191, 223, 244, 273, 288, 294, 298, 305, 308},
422 {0, 0, 0, 0, 138, 0, 200, 231, 251, 279, 293, 298, 302, 308, 312},
423 {0, 0, 0, 0, 217, 0, 429, 634, 834, 1220, 1585, 1760, 1931, 2258, 2466},
424 {0, 0, 0, 0, 241, 0, 475, 701, 921, 1343, 1741, 1931, 2117, 2468, 2691},
427 static const u16 expected_tpt_mimo2_20MHz
[4][IWL_RATE_COUNT
] = {
428 {0, 0, 0, 0, 74, 0, 123, 155, 179, 213, 235, 243, 250, 261, 0},
429 {0, 0, 0, 0, 81, 0, 131, 164, 187, 221, 242, 250, 256, 267, 0},
430 {0, 0, 0, 0, 98, 0, 193, 286, 375, 550, 718, 799, 878, 1032, 0},
431 {0, 0, 0, 0, 109, 0, 214, 316, 414, 607, 790, 879, 965, 1132, 0},
434 static const u16 expected_tpt_mimo2_40MHz
[4][IWL_RATE_COUNT
] = {
435 {0, 0, 0, 0, 123, 0, 182, 214, 235, 264, 279, 285, 289, 296, 300},
436 {0, 0, 0, 0, 131, 0, 191, 222, 242, 270, 284, 289, 293, 300, 303},
437 {0, 0, 0, 0, 200, 0, 390, 571, 741, 1067, 1365, 1505, 1640, 1894, 2053},
438 {0, 0, 0, 0, 221, 0, 430, 630, 816, 1169, 1490, 1641, 1784, 2053, 2221},
441 static const u16 expected_tpt_mimo2_80MHz
[4][IWL_RATE_COUNT
] = {
442 {0, 0, 0, 0, 182, 0, 240, 264, 278, 299, 308, 311, 313, 317, 319},
443 {0, 0, 0, 0, 190, 0, 247, 269, 282, 302, 310, 313, 315, 319, 320},
444 {0, 0, 0, 0, 428, 0, 833, 1215, 1577, 2254, 2863, 3147, 3418, 3913, 4219},
445 {0, 0, 0, 0, 474, 0, 920, 1338, 1732, 2464, 3116, 3418, 3705, 4225, 4545},
449 static const struct iwl_rate_mcs_info iwl_rate_mcs
[IWL_RATE_COUNT
] = {
458 { "24", "16QAM 1/2"},
459 { "36", "16QAM 3/4"},
460 { "48", "64QAM 2/3"},
461 { "54", "64QAM 3/4"},
462 { "60", "64QAM 5/6"},
465 #define MCS_INDEX_PER_STREAM (8)
467 static const char *rs_pretty_ant(u8 ant
)
469 static const char * const ant_name
[] = {
483 return ant_name
[ant
];
486 static const char *rs_pretty_lq_type(enum iwl_table_type type
)
488 static const char * const lq_types
[] = {
490 [LQ_LEGACY_A
] = "LEGACY_A",
491 [LQ_LEGACY_G
] = "LEGACY_G",
492 [LQ_HT_SISO
] = "HT SISO",
493 [LQ_HT_MIMO2
] = "HT MIMO",
494 [LQ_VHT_SISO
] = "VHT SISO",
495 [LQ_VHT_MIMO2
] = "VHT MIMO",
498 if (type
< LQ_NONE
|| type
>= LQ_MAX
)
501 return lq_types
[type
];
504 static inline void rs_dump_rate(struct iwl_mvm
*mvm
, const struct rs_rate
*rate
,
507 IWL_DEBUG_RATE(mvm
, "%s: (%s: %d) ANT: %s BW: %d SGI: %d\n",
508 prefix
, rs_pretty_lq_type(rate
->type
),
509 rate
->index
, rs_pretty_ant(rate
->ant
),
510 rate
->bw
, rate
->sgi
);
513 static void rs_rate_scale_clear_window(struct iwl_rate_scale_data
*window
)
516 window
->success_counter
= 0;
517 window
->success_ratio
= IWL_INVALID_VALUE
;
519 window
->average_tpt
= IWL_INVALID_VALUE
;
522 static void rs_rate_scale_clear_tbl_windows(struct iwl_mvm
*mvm
,
523 struct iwl_scale_tbl_info
*tbl
)
527 IWL_DEBUG_RATE(mvm
, "Clearing up window stats\n");
528 for (i
= 0; i
< IWL_RATE_COUNT
; i
++)
529 rs_rate_scale_clear_window(&tbl
->win
[i
]);
531 for (i
= 0; i
< ARRAY_SIZE(tbl
->tpc_win
); i
++)
532 rs_rate_scale_clear_window(&tbl
->tpc_win
[i
]);
535 static inline u8
rs_is_valid_ant(u8 valid_antenna
, u8 ant_type
)
537 return (ant_type
& valid_antenna
) == ant_type
;
540 static int rs_tl_turn_on_agg_for_tid(struct iwl_mvm
*mvm
,
541 struct iwl_lq_sta
*lq_data
, u8 tid
,
542 struct ieee80211_sta
*sta
)
546 IWL_DEBUG_HT(mvm
, "Starting Tx agg: STA: %pM tid: %d\n",
548 ret
= ieee80211_start_tx_ba_session(sta
, tid
, 5000);
549 if (ret
== -EAGAIN
) {
551 * driver and mac80211 is out of sync
552 * this might be cause by reloading firmware
553 * stop the tx ba session here
555 IWL_ERR(mvm
, "Fail start Tx agg on tid: %d\n",
557 ieee80211_stop_tx_ba_session(sta
, tid
);
562 static void rs_tl_turn_on_agg(struct iwl_mvm
*mvm
, u8 tid
,
563 struct iwl_lq_sta
*lq_data
,
564 struct ieee80211_sta
*sta
)
566 if (tid
< IWL_MAX_TID_COUNT
)
567 rs_tl_turn_on_agg_for_tid(mvm
, lq_data
, tid
, sta
);
569 IWL_ERR(mvm
, "tid exceeds max TID count: %d/%d\n",
570 tid
, IWL_MAX_TID_COUNT
);
573 static inline int get_num_of_ant_from_rate(u32 rate_n_flags
)
575 return !!(rate_n_flags
& RATE_MCS_ANT_A_MSK
) +
576 !!(rate_n_flags
& RATE_MCS_ANT_B_MSK
) +
577 !!(rate_n_flags
& RATE_MCS_ANT_C_MSK
);
581 * Static function to get the expected throughput from an iwl_scale_tbl_info
582 * that wraps a NULL pointer check
584 static s32
get_expected_tpt(struct iwl_scale_tbl_info
*tbl
, int rs_index
)
586 if (tbl
->expected_tpt
)
587 return tbl
->expected_tpt
[rs_index
];
592 * rs_collect_tx_data - Update the success/failure sliding window
594 * We keep a sliding window of the last 62 packets transmitted
595 * at this rate. window->data contains the bitmask of successful
598 static int _rs_collect_tx_data(struct iwl_scale_tbl_info
*tbl
,
599 int scale_index
, int attempts
, int successes
,
600 struct iwl_rate_scale_data
*window
)
602 static const u64 mask
= (((u64
)1) << (IWL_RATE_MAX_WINDOW
- 1));
605 /* Get expected throughput */
606 tpt
= get_expected_tpt(tbl
, scale_index
);
609 * Keep track of only the latest 62 tx frame attempts in this rate's
610 * history window; anything older isn't really relevant any more.
611 * If we have filled up the sliding window, drop the oldest attempt;
612 * if the oldest attempt (highest bit in bitmap) shows "success",
613 * subtract "1" from the success counter (this is the main reason
614 * we keep these bitmaps!).
616 while (attempts
> 0) {
617 if (window
->counter
>= IWL_RATE_MAX_WINDOW
) {
618 /* remove earliest */
619 window
->counter
= IWL_RATE_MAX_WINDOW
- 1;
621 if (window
->data
& mask
) {
622 window
->data
&= ~mask
;
623 window
->success_counter
--;
627 /* Increment frames-attempted counter */
630 /* Shift bitmap by one frame to throw away oldest history */
633 /* Mark the most recent #successes attempts as successful */
635 window
->success_counter
++;
643 /* Calculate current success ratio, avoid divide-by-0! */
644 if (window
->counter
> 0)
645 window
->success_ratio
= 128 * (100 * window
->success_counter
)
648 window
->success_ratio
= IWL_INVALID_VALUE
;
650 fail_count
= window
->counter
- window
->success_counter
;
652 /* Calculate average throughput, if we have enough history. */
653 if ((fail_count
>= IWL_RATE_MIN_FAILURE_TH
) ||
654 (window
->success_counter
>= IWL_RATE_MIN_SUCCESS_TH
))
655 window
->average_tpt
= (window
->success_ratio
* tpt
+ 64) / 128;
657 window
->average_tpt
= IWL_INVALID_VALUE
;
662 static int rs_collect_tx_data(struct iwl_lq_sta
*lq_sta
,
663 struct iwl_scale_tbl_info
*tbl
,
664 int scale_index
, int attempts
, int successes
,
667 struct iwl_rate_scale_data
*window
= NULL
;
670 if (scale_index
< 0 || scale_index
>= IWL_RATE_COUNT
)
673 if (tbl
->column
!= RS_COLUMN_INVALID
) {
674 lq_sta
->tx_stats
[tbl
->column
][scale_index
].total
+= attempts
;
675 lq_sta
->tx_stats
[tbl
->column
][scale_index
].success
+= successes
;
678 /* Select window for current tx bit rate */
679 window
= &(tbl
->win
[scale_index
]);
681 ret
= _rs_collect_tx_data(tbl
, scale_index
, attempts
, successes
,
686 if (WARN_ON_ONCE(reduced_txp
> TPC_MAX_REDUCTION
))
689 window
= &tbl
->tpc_win
[reduced_txp
];
690 return _rs_collect_tx_data(tbl
, scale_index
, attempts
, successes
,
694 /* Convert rs_rate object into ucode rate bitmask */
695 static u32
ucode_rate_from_rs_rate(struct iwl_mvm
*mvm
,
696 struct rs_rate
*rate
)
699 int index
= rate
->index
;
701 ucode_rate
|= ((rate
->ant
<< RATE_MCS_ANT_POS
) &
702 RATE_MCS_ANT_ABC_MSK
);
704 if (is_legacy(rate
)) {
705 ucode_rate
|= iwl_rates
[index
].plcp
;
706 if (index
>= IWL_FIRST_CCK_RATE
&& index
<= IWL_LAST_CCK_RATE
)
707 ucode_rate
|= RATE_MCS_CCK_MSK
;
712 if (index
< IWL_FIRST_HT_RATE
|| index
> IWL_LAST_HT_RATE
) {
713 IWL_ERR(mvm
, "Invalid HT rate index %d\n", index
);
714 index
= IWL_LAST_HT_RATE
;
716 ucode_rate
|= RATE_MCS_HT_MSK
;
718 if (is_ht_siso(rate
))
719 ucode_rate
|= iwl_rates
[index
].plcp_ht_siso
;
720 else if (is_ht_mimo2(rate
))
721 ucode_rate
|= iwl_rates
[index
].plcp_ht_mimo2
;
724 } else if (is_vht(rate
)) {
725 if (index
< IWL_FIRST_VHT_RATE
|| index
> IWL_LAST_VHT_RATE
) {
726 IWL_ERR(mvm
, "Invalid VHT rate index %d\n", index
);
727 index
= IWL_LAST_VHT_RATE
;
729 ucode_rate
|= RATE_MCS_VHT_MSK
;
730 if (is_vht_siso(rate
))
731 ucode_rate
|= iwl_rates
[index
].plcp_vht_siso
;
732 else if (is_vht_mimo2(rate
))
733 ucode_rate
|= iwl_rates
[index
].plcp_vht_mimo2
;
738 IWL_ERR(mvm
, "Invalid rate->type %d\n", rate
->type
);
741 ucode_rate
|= rate
->bw
;
743 ucode_rate
|= RATE_MCS_SGI_MSK
;
748 /* Convert a ucode rate into an rs_rate object */
749 static int rs_rate_from_ucode_rate(const u32 ucode_rate
,
750 enum ieee80211_band band
,
751 struct rs_rate
*rate
)
753 u32 ant_msk
= ucode_rate
& RATE_MCS_ANT_ABC_MSK
;
754 u8 num_of_ant
= get_num_of_ant_from_rate(ucode_rate
);
757 memset(rate
, 0, sizeof(*rate
));
758 rate
->index
= iwl_hwrate_to_plcp_idx(ucode_rate
);
760 if (rate
->index
== IWL_RATE_INVALID
)
763 rate
->ant
= (ant_msk
>> RATE_MCS_ANT_POS
);
766 if (!(ucode_rate
& RATE_MCS_HT_MSK
) &&
767 !(ucode_rate
& RATE_MCS_VHT_MSK
)) {
768 if (num_of_ant
== 1) {
769 if (band
== IEEE80211_BAND_5GHZ
)
770 rate
->type
= LQ_LEGACY_A
;
772 rate
->type
= LQ_LEGACY_G
;
779 if (ucode_rate
& RATE_MCS_SGI_MSK
)
782 rate
->bw
= ucode_rate
& RATE_MCS_CHAN_WIDTH_MSK
;
784 if (ucode_rate
& RATE_MCS_HT_MSK
) {
785 nss
= ((ucode_rate
& RATE_HT_MCS_NSS_MSK
) >>
786 RATE_HT_MCS_NSS_POS
) + 1;
789 rate
->type
= LQ_HT_SISO
;
790 WARN_ON_ONCE(num_of_ant
!= 1);
791 } else if (nss
== 2) {
792 rate
->type
= LQ_HT_MIMO2
;
793 WARN_ON_ONCE(num_of_ant
!= 2);
797 } else if (ucode_rate
& RATE_MCS_VHT_MSK
) {
798 nss
= ((ucode_rate
& RATE_VHT_MCS_NSS_MSK
) >>
799 RATE_VHT_MCS_NSS_POS
) + 1;
802 rate
->type
= LQ_VHT_SISO
;
803 WARN_ON_ONCE(num_of_ant
!= 1);
804 } else if (nss
== 2) {
805 rate
->type
= LQ_VHT_MIMO2
;
806 WARN_ON_ONCE(num_of_ant
!= 2);
812 WARN_ON_ONCE(rate
->bw
== RATE_MCS_CHAN_WIDTH_160
);
813 WARN_ON_ONCE(rate
->bw
== RATE_MCS_CHAN_WIDTH_80
&&
819 /* switch to another antenna/antennas and return 1 */
820 /* if no other valid antenna found, return 0 */
821 static int rs_toggle_antenna(u32 valid_ant
, struct rs_rate
*rate
)
825 if (!rate
->ant
|| rate
->ant
> ANT_ABC
)
828 if (!rs_is_valid_ant(valid_ant
, rate
->ant
))
831 new_ant_type
= ant_toggle_lookup
[rate
->ant
];
833 while ((new_ant_type
!= rate
->ant
) &&
834 !rs_is_valid_ant(valid_ant
, new_ant_type
))
835 new_ant_type
= ant_toggle_lookup
[new_ant_type
];
837 if (new_ant_type
== rate
->ant
)
840 rate
->ant
= new_ant_type
;
845 static u16
rs_get_supported_rates(struct iwl_lq_sta
*lq_sta
,
846 struct rs_rate
*rate
)
849 return lq_sta
->active_legacy_rate
;
850 else if (is_siso(rate
))
851 return lq_sta
->active_siso_rate
;
852 else if (is_mimo2(rate
))
853 return lq_sta
->active_mimo2_rate
;
859 static u16
rs_get_adjacent_rate(struct iwl_mvm
*mvm
, u8 index
, u16 rate_mask
,
862 u8 high
= IWL_RATE_INVALID
;
863 u8 low
= IWL_RATE_INVALID
;
865 /* 802.11A or ht walks to the next literal adjacent rate in
867 if (is_type_a_band(rate_type
) || !is_type_legacy(rate_type
)) {
871 /* Find the previous rate that is in the rate mask */
873 for (mask
= (1 << i
); i
>= 0; i
--, mask
>>= 1) {
874 if (rate_mask
& mask
) {
880 /* Find the next rate that is in the rate mask */
882 for (mask
= (1 << i
); i
< IWL_RATE_COUNT
; i
++, mask
<<= 1) {
883 if (rate_mask
& mask
) {
889 return (high
<< 8) | low
;
893 while (low
!= IWL_RATE_INVALID
) {
894 low
= iwl_rates
[low
].prev_rs
;
895 if (low
== IWL_RATE_INVALID
)
897 if (rate_mask
& (1 << low
))
899 IWL_DEBUG_RATE(mvm
, "Skipping masked lower rate: %d\n", low
);
903 while (high
!= IWL_RATE_INVALID
) {
904 high
= iwl_rates
[high
].next_rs
;
905 if (high
== IWL_RATE_INVALID
)
907 if (rate_mask
& (1 << high
))
909 IWL_DEBUG_RATE(mvm
, "Skipping masked higher rate: %d\n", high
);
912 return (high
<< 8) | low
;
915 static inline bool rs_rate_supported(struct iwl_lq_sta
*lq_sta
,
916 struct rs_rate
*rate
)
918 return BIT(rate
->index
) & rs_get_supported_rates(lq_sta
, rate
);
921 /* Get the next supported lower rate in the current column.
922 * Return true if bottom rate in the current column was reached
924 static bool rs_get_lower_rate_in_column(struct iwl_lq_sta
*lq_sta
,
925 struct rs_rate
*rate
)
930 struct iwl_mvm
*mvm
= lq_sta
->drv
;
932 rate_mask
= rs_get_supported_rates(lq_sta
, rate
);
933 high_low
= rs_get_adjacent_rate(mvm
, rate
->index
, rate_mask
,
935 low
= high_low
& 0xff;
937 /* Bottom rate of column reached */
938 if (low
== IWL_RATE_INVALID
)
945 /* Get the next rate to use following a column downgrade */
946 static void rs_get_lower_rate_down_column(struct iwl_lq_sta
*lq_sta
,
947 struct rs_rate
*rate
)
949 struct iwl_mvm
*mvm
= lq_sta
->drv
;
951 if (is_legacy(rate
)) {
952 /* No column to downgrade from Legacy */
954 } else if (is_siso(rate
)) {
955 /* Downgrade to Legacy if we were in SISO */
956 if (lq_sta
->band
== IEEE80211_BAND_5GHZ
)
957 rate
->type
= LQ_LEGACY_A
;
959 rate
->type
= LQ_LEGACY_G
;
961 rate
->bw
= RATE_MCS_CHAN_WIDTH_20
;
963 WARN_ON_ONCE(rate
->index
< IWL_RATE_MCS_0_INDEX
||
964 rate
->index
> IWL_RATE_MCS_9_INDEX
);
966 rate
->index
= rs_ht_to_legacy
[rate
->index
];
968 /* Downgrade to SISO with same MCS if in MIMO */
969 rate
->type
= is_vht_mimo2(rate
) ?
970 LQ_VHT_SISO
: LQ_HT_SISO
;
974 if (num_of_ant(rate
->ant
) > 1)
975 rate
->ant
= first_antenna(mvm
->fw
->valid_tx_ant
);
977 /* Relevant in both switching to SISO or Legacy */
980 if (!rs_rate_supported(lq_sta
, rate
))
981 rs_get_lower_rate_in_column(lq_sta
, rate
);
984 /* Simple function to compare two rate scale table types */
985 static inline bool rs_rate_match(struct rs_rate
*a
,
988 return (a
->type
== b
->type
) && (a
->ant
== b
->ant
) && (a
->sgi
== b
->sgi
);
991 static u32
rs_ch_width_from_mac_flags(enum mac80211_rate_control_flags flags
)
993 if (flags
& IEEE80211_TX_RC_40_MHZ_WIDTH
)
994 return RATE_MCS_CHAN_WIDTH_40
;
995 else if (flags
& IEEE80211_TX_RC_80_MHZ_WIDTH
)
996 return RATE_MCS_CHAN_WIDTH_80
;
997 else if (flags
& IEEE80211_TX_RC_160_MHZ_WIDTH
)
998 return RATE_MCS_CHAN_WIDTH_160
;
1000 return RATE_MCS_CHAN_WIDTH_20
;
1004 * mac80211 sends us Tx status
1006 static void rs_tx_status(void *mvm_r
, struct ieee80211_supported_band
*sband
,
1007 struct ieee80211_sta
*sta
, void *priv_sta
,
1008 struct sk_buff
*skb
)
1013 struct iwl_lq_sta
*lq_sta
= priv_sta
;
1014 struct iwl_lq_cmd
*table
;
1015 struct ieee80211_hdr
*hdr
= (struct ieee80211_hdr
*)skb
->data
;
1016 struct iwl_op_mode
*op_mode
= (struct iwl_op_mode
*)mvm_r
;
1017 struct iwl_mvm
*mvm
= IWL_OP_MODE_GET_MVM(op_mode
);
1018 struct ieee80211_tx_info
*info
= IEEE80211_SKB_CB(skb
);
1019 enum mac80211_rate_control_flags mac_flags
;
1021 struct rs_rate rate
;
1022 struct iwl_scale_tbl_info
*curr_tbl
, *other_tbl
, *tmp_tbl
;
1023 u8 reduced_txp
= (uintptr_t)info
->status
.status_driver_data
[0];
1025 /* Treat uninitialized rate scaling data same as non-existing. */
1027 IWL_DEBUG_RATE(mvm
, "Station rate scaling not created yet.\n");
1029 } else if (!lq_sta
->drv
) {
1030 IWL_DEBUG_RATE(mvm
, "Rate scaling not initialized yet.\n");
1034 #ifdef CONFIG_MAC80211_DEBUGFS
1035 /* Disable last tx check if we are debugging with fixed rate */
1036 if (lq_sta
->dbg_fixed_rate
) {
1037 IWL_DEBUG_RATE(mvm
, "Fixed rate. avoid rate scaling\n");
1041 if (!ieee80211_is_data(hdr
->frame_control
) ||
1042 info
->flags
& IEEE80211_TX_CTL_NO_ACK
)
1045 /* This packet was aggregated but doesn't carry status info */
1046 if ((info
->flags
& IEEE80211_TX_CTL_AMPDU
) &&
1047 !(info
->flags
& IEEE80211_TX_STAT_AMPDU
))
1051 * Ignore this Tx frame response if its initial rate doesn't match
1052 * that of latest Link Quality command. There may be stragglers
1053 * from a previous Link Quality command, but we're no longer interested
1054 * in those; they're either from the "active" mode while we're trying
1055 * to check "search" mode, or a prior "search" mode after we've moved
1056 * to a new "search" mode (which might become the new "active" mode).
1058 table
= &lq_sta
->lq
;
1059 ucode_rate
= le32_to_cpu(table
->rs_table
[0]);
1060 rs_rate_from_ucode_rate(ucode_rate
, info
->band
, &rate
);
1061 if (info
->band
== IEEE80211_BAND_5GHZ
)
1062 rate
.index
-= IWL_FIRST_OFDM_RATE
;
1063 mac_flags
= info
->status
.rates
[0].flags
;
1064 mac_index
= info
->status
.rates
[0].idx
;
1065 /* For HT packets, map MCS to PLCP */
1066 if (mac_flags
& IEEE80211_TX_RC_MCS
) {
1067 /* Remove # of streams */
1068 mac_index
&= RATE_HT_MCS_RATE_CODE_MSK
;
1069 if (mac_index
>= (IWL_RATE_9M_INDEX
- IWL_FIRST_OFDM_RATE
))
1072 * mac80211 HT index is always zero-indexed; we need to move
1073 * HT OFDM rates after CCK rates in 2.4 GHz band
1075 if (info
->band
== IEEE80211_BAND_2GHZ
)
1076 mac_index
+= IWL_FIRST_OFDM_RATE
;
1077 } else if (mac_flags
& IEEE80211_TX_RC_VHT_MCS
) {
1078 mac_index
&= RATE_VHT_MCS_RATE_CODE_MSK
;
1079 if (mac_index
>= (IWL_RATE_9M_INDEX
- IWL_FIRST_OFDM_RATE
))
1083 if (time_after(jiffies
,
1084 (unsigned long)(lq_sta
->last_tx
+ RS_IDLE_TIMEOUT
))) {
1086 IWL_DEBUG_RATE(mvm
, "Tx idle for too long. reinit rs\n");
1087 for (tid
= 0; tid
< IWL_MAX_TID_COUNT
; tid
++)
1088 ieee80211_stop_tx_ba_session(sta
, tid
);
1090 iwl_mvm_rs_rate_init(mvm
, sta
, sband
->band
, false);
1093 lq_sta
->last_tx
= jiffies
;
1095 /* Here we actually compare this rate to the latest LQ command */
1096 if ((mac_index
< 0) ||
1097 (rate
.sgi
!= !!(mac_flags
& IEEE80211_TX_RC_SHORT_GI
)) ||
1098 (rate
.bw
!= rs_ch_width_from_mac_flags(mac_flags
)) ||
1099 (rate
.ant
!= info
->status
.antenna
) ||
1100 (!!(ucode_rate
& RATE_MCS_HT_MSK
) !=
1101 !!(mac_flags
& IEEE80211_TX_RC_MCS
)) ||
1102 (!!(ucode_rate
& RATE_MCS_VHT_MSK
) !=
1103 !!(mac_flags
& IEEE80211_TX_RC_VHT_MCS
)) ||
1104 (!!(ucode_rate
& RATE_HT_MCS_GF_MSK
) !=
1105 !!(mac_flags
& IEEE80211_TX_RC_GREEN_FIELD
)) ||
1106 (rate
.index
!= mac_index
)) {
1108 "initial rate %d does not match %d (0x%x)\n",
1109 mac_index
, rate
.index
, ucode_rate
);
1111 * Since rates mis-match, the last LQ command may have failed.
1112 * After IWL_MISSED_RATE_MAX mis-matches, resync the uCode with
1115 lq_sta
->missed_rate_counter
++;
1116 if (lq_sta
->missed_rate_counter
> IWL_MISSED_RATE_MAX
) {
1117 lq_sta
->missed_rate_counter
= 0;
1119 "Too many rates mismatch. Send sync LQ. rs_state %d\n",
1121 iwl_mvm_send_lq_cmd(mvm
, &lq_sta
->lq
, false);
1123 /* Regardless, ignore this status info for outdated rate */
1126 /* Rate did match, so reset the missed_rate_counter */
1127 lq_sta
->missed_rate_counter
= 0;
1129 /* Figure out if rate scale algorithm is in active or search table */
1130 if (rs_rate_match(&rate
,
1131 &(lq_sta
->lq_info
[lq_sta
->active_tbl
].rate
))) {
1132 curr_tbl
= &(lq_sta
->lq_info
[lq_sta
->active_tbl
]);
1133 other_tbl
= &(lq_sta
->lq_info
[1 - lq_sta
->active_tbl
]);
1134 } else if (rs_rate_match(&rate
,
1135 &lq_sta
->lq_info
[1 - lq_sta
->active_tbl
].rate
)) {
1136 curr_tbl
= &(lq_sta
->lq_info
[1 - lq_sta
->active_tbl
]);
1137 other_tbl
= &(lq_sta
->lq_info
[lq_sta
->active_tbl
]);
1140 "Neither active nor search matches tx rate\n");
1141 tmp_tbl
= &(lq_sta
->lq_info
[lq_sta
->active_tbl
]);
1142 rs_dump_rate(mvm
, &tmp_tbl
->rate
, "ACTIVE");
1143 tmp_tbl
= &(lq_sta
->lq_info
[1 - lq_sta
->active_tbl
]);
1144 rs_dump_rate(mvm
, &tmp_tbl
->rate
, "SEARCH");
1145 rs_dump_rate(mvm
, &rate
, "ACTUAL");
1148 * no matching table found, let's by-pass the data collection
1149 * and continue to perform rate scale to find the rate table
1151 rs_stay_in_table(lq_sta
, true);
1156 * Updating the frame history depends on whether packets were
1159 * For aggregation, all packets were transmitted at the same rate, the
1160 * first index into rate scale table.
1162 if (info
->flags
& IEEE80211_TX_STAT_AMPDU
) {
1163 ucode_rate
= le32_to_cpu(table
->rs_table
[0]);
1164 rs_rate_from_ucode_rate(ucode_rate
, info
->band
, &rate
);
1165 rs_collect_tx_data(lq_sta
, curr_tbl
, rate
.index
,
1166 info
->status
.ampdu_len
,
1167 info
->status
.ampdu_ack_len
,
1170 /* Update success/fail counts if not searching for new mode */
1171 if (lq_sta
->rs_state
== RS_STATE_STAY_IN_COLUMN
) {
1172 lq_sta
->total_success
+= info
->status
.ampdu_ack_len
;
1173 lq_sta
->total_failed
+= (info
->status
.ampdu_len
-
1174 info
->status
.ampdu_ack_len
);
1178 * For legacy, update frame history with for each Tx retry.
1180 retries
= info
->status
.rates
[0].count
- 1;
1181 /* HW doesn't send more than 15 retries */
1182 retries
= min(retries
, 15);
1184 /* The last transmission may have been successful */
1185 legacy_success
= !!(info
->flags
& IEEE80211_TX_STAT_ACK
);
1186 /* Collect data for each rate used during failed TX attempts */
1187 for (i
= 0; i
<= retries
; ++i
) {
1188 ucode_rate
= le32_to_cpu(table
->rs_table
[i
]);
1189 rs_rate_from_ucode_rate(ucode_rate
, info
->band
, &rate
);
1191 * Only collect stats if retried rate is in the same RS
1192 * table as active/search.
1194 if (rs_rate_match(&rate
, &curr_tbl
->rate
))
1196 else if (rs_rate_match(&rate
, &other_tbl
->rate
))
1197 tmp_tbl
= other_tbl
;
1201 rs_collect_tx_data(lq_sta
, tmp_tbl
, rate
.index
, 1,
1202 i
< retries
? 0 : legacy_success
,
1206 /* Update success/fail counts if not searching for new mode */
1207 if (lq_sta
->rs_state
== RS_STATE_STAY_IN_COLUMN
) {
1208 lq_sta
->total_success
+= legacy_success
;
1209 lq_sta
->total_failed
+= retries
+ (1 - legacy_success
);
1212 /* The last TX rate is cached in lq_sta; it's set in if/else above */
1213 lq_sta
->last_rate_n_flags
= ucode_rate
;
1214 IWL_DEBUG_RATE(mvm
, "reduced txpower: %d\n", reduced_txp
);
1216 /* See if there's a better rate or modulation mode to try. */
1217 if (sta
&& sta
->supp_rates
[sband
->band
])
1218 rs_rate_scale_perform(mvm
, skb
, sta
, lq_sta
);
1222 * Begin a period of staying with a selected modulation mode.
1223 * Set "stay_in_tbl" flag to prevent any mode switches.
1224 * Set frame tx success limits according to legacy vs. high-throughput,
1225 * and reset overall (spanning all rates) tx success history statistics.
1226 * These control how long we stay using same modulation mode before
1227 * searching for a new mode.
1229 static void rs_set_stay_in_table(struct iwl_mvm
*mvm
, u8 is_legacy
,
1230 struct iwl_lq_sta
*lq_sta
)
1232 IWL_DEBUG_RATE(mvm
, "Moving to RS_STATE_STAY_IN_COLUMN\n");
1233 lq_sta
->rs_state
= RS_STATE_STAY_IN_COLUMN
;
1235 lq_sta
->table_count_limit
= IWL_LEGACY_TABLE_COUNT
;
1236 lq_sta
->max_failure_limit
= IWL_LEGACY_FAILURE_LIMIT
;
1237 lq_sta
->max_success_limit
= IWL_LEGACY_SUCCESS_LIMIT
;
1239 lq_sta
->table_count_limit
= IWL_NONE_LEGACY_TABLE_COUNT
;
1240 lq_sta
->max_failure_limit
= IWL_NONE_LEGACY_FAILURE_LIMIT
;
1241 lq_sta
->max_success_limit
= IWL_NONE_LEGACY_SUCCESS_LIMIT
;
1243 lq_sta
->table_count
= 0;
1244 lq_sta
->total_failed
= 0;
1245 lq_sta
->total_success
= 0;
1246 lq_sta
->flush_timer
= jiffies
;
1247 lq_sta
->visited_columns
= 0;
1250 static int rs_get_max_allowed_rate(struct iwl_lq_sta
*lq_sta
,
1251 const struct rs_tx_column
*column
)
1253 switch (column
->mode
) {
1255 return lq_sta
->max_legacy_rate_idx
;
1257 return lq_sta
->max_siso_rate_idx
;
1259 return lq_sta
->max_mimo2_rate_idx
;
1264 return lq_sta
->max_legacy_rate_idx
;
1267 static const u16
*rs_get_expected_tpt_table(struct iwl_lq_sta
*lq_sta
,
1268 const struct rs_tx_column
*column
,
1271 /* Used to choose among HT tables */
1272 const u16 (*ht_tbl_pointer
)[IWL_RATE_COUNT
];
1274 if (WARN_ON_ONCE(column
->mode
!= RS_LEGACY
&&
1275 column
->mode
!= RS_SISO
&&
1276 column
->mode
!= RS_MIMO2
))
1277 return expected_tpt_legacy
;
1279 /* Legacy rates have only one table */
1280 if (column
->mode
== RS_LEGACY
)
1281 return expected_tpt_legacy
;
1283 ht_tbl_pointer
= expected_tpt_mimo2_20MHz
;
1284 /* Choose among many HT tables depending on number of streams
1285 * (SISO/MIMO2), channel width (20/40/80), SGI, and aggregation
1287 if (column
->mode
== RS_SISO
) {
1289 case RATE_MCS_CHAN_WIDTH_20
:
1290 ht_tbl_pointer
= expected_tpt_siso_20MHz
;
1292 case RATE_MCS_CHAN_WIDTH_40
:
1293 ht_tbl_pointer
= expected_tpt_siso_40MHz
;
1295 case RATE_MCS_CHAN_WIDTH_80
:
1296 ht_tbl_pointer
= expected_tpt_siso_80MHz
;
1301 } else if (column
->mode
== RS_MIMO2
) {
1303 case RATE_MCS_CHAN_WIDTH_20
:
1304 ht_tbl_pointer
= expected_tpt_mimo2_20MHz
;
1306 case RATE_MCS_CHAN_WIDTH_40
:
1307 ht_tbl_pointer
= expected_tpt_mimo2_40MHz
;
1309 case RATE_MCS_CHAN_WIDTH_80
:
1310 ht_tbl_pointer
= expected_tpt_mimo2_80MHz
;
1319 if (!column
->sgi
&& !lq_sta
->is_agg
) /* Normal */
1320 return ht_tbl_pointer
[0];
1321 else if (column
->sgi
&& !lq_sta
->is_agg
) /* SGI */
1322 return ht_tbl_pointer
[1];
1323 else if (!column
->sgi
&& lq_sta
->is_agg
) /* AGG */
1324 return ht_tbl_pointer
[2];
1326 return ht_tbl_pointer
[3];
1329 static void rs_set_expected_tpt_table(struct iwl_lq_sta
*lq_sta
,
1330 struct iwl_scale_tbl_info
*tbl
)
1332 struct rs_rate
*rate
= &tbl
->rate
;
1333 const struct rs_tx_column
*column
= &rs_tx_columns
[tbl
->column
];
1335 tbl
->expected_tpt
= rs_get_expected_tpt_table(lq_sta
, column
, rate
->bw
);
1338 static s32
rs_get_best_rate(struct iwl_mvm
*mvm
,
1339 struct iwl_lq_sta
*lq_sta
,
1340 struct iwl_scale_tbl_info
*tbl
, /* "search" */
1341 unsigned long rate_mask
, s8 index
)
1343 struct iwl_scale_tbl_info
*active_tbl
=
1344 &(lq_sta
->lq_info
[lq_sta
->active_tbl
]);
1345 s32 success_ratio
= active_tbl
->win
[index
].success_ratio
;
1346 u16 expected_current_tpt
= active_tbl
->expected_tpt
[index
];
1347 const u16
*tpt_tbl
= tbl
->expected_tpt
;
1352 if (success_ratio
> RS_SR_NO_DECREASE
) {
1353 target_tpt
= 100 * expected_current_tpt
;
1355 "SR %d high. Find rate exceeding EXPECTED_CURRENT %d\n",
1356 success_ratio
, target_tpt
);
1358 target_tpt
= lq_sta
->last_tpt
;
1360 "SR %d not thag good. Find rate exceeding ACTUAL_TPT %d\n",
1361 success_ratio
, target_tpt
);
1364 rate_idx
= find_first_bit(&rate_mask
, BITS_PER_LONG
);
1366 while (rate_idx
!= IWL_RATE_INVALID
) {
1367 if (target_tpt
< (100 * tpt_tbl
[rate_idx
]))
1370 high_low
= rs_get_adjacent_rate(mvm
, rate_idx
, rate_mask
,
1373 rate_idx
= (high_low
>> 8) & 0xff;
1376 IWL_DEBUG_RATE(mvm
, "Best rate found %d target_tp %d expected_new %d\n",
1377 rate_idx
, target_tpt
,
1378 rate_idx
!= IWL_RATE_INVALID
?
1379 100 * tpt_tbl
[rate_idx
] : IWL_INVALID_VALUE
);
1384 static u32
rs_bw_from_sta_bw(struct ieee80211_sta
*sta
)
1386 if (sta
->bandwidth
>= IEEE80211_STA_RX_BW_80
)
1387 return RATE_MCS_CHAN_WIDTH_80
;
1388 else if (sta
->bandwidth
>= IEEE80211_STA_RX_BW_40
)
1389 return RATE_MCS_CHAN_WIDTH_40
;
1391 return RATE_MCS_CHAN_WIDTH_20
;
1395 * Check whether we should continue using same modulation mode, or
1396 * begin search for a new mode, based on:
1397 * 1) # tx successes or failures while using this mode
1398 * 2) # times calling this function
1399 * 3) elapsed time in this mode (not used, for now)
1401 static void rs_stay_in_table(struct iwl_lq_sta
*lq_sta
, bool force_search
)
1403 struct iwl_scale_tbl_info
*tbl
;
1405 int flush_interval_passed
= 0;
1406 struct iwl_mvm
*mvm
;
1409 active_tbl
= lq_sta
->active_tbl
;
1411 tbl
= &(lq_sta
->lq_info
[active_tbl
]);
1413 /* If we've been disallowing search, see if we should now allow it */
1414 if (lq_sta
->rs_state
== RS_STATE_STAY_IN_COLUMN
) {
1415 /* Elapsed time using current modulation mode */
1416 if (lq_sta
->flush_timer
)
1417 flush_interval_passed
=
1419 (unsigned long)(lq_sta
->flush_timer
+
1420 RS_STAY_IN_COLUMN_TIMEOUT
));
1423 * Check if we should allow search for new modulation mode.
1424 * If many frames have failed or succeeded, or we've used
1425 * this same modulation for a long time, allow search, and
1426 * reset history stats that keep track of whether we should
1427 * allow a new search. Also (below) reset all bitmaps and
1428 * stats in active history.
1431 (lq_sta
->total_failed
> lq_sta
->max_failure_limit
) ||
1432 (lq_sta
->total_success
> lq_sta
->max_success_limit
) ||
1433 ((!lq_sta
->search_better_tbl
) &&
1434 (lq_sta
->flush_timer
) && (flush_interval_passed
))) {
1436 "LQ: stay is expired %d %d %d\n",
1437 lq_sta
->total_failed
,
1438 lq_sta
->total_success
,
1439 flush_interval_passed
);
1441 /* Allow search for new mode */
1442 lq_sta
->rs_state
= RS_STATE_SEARCH_CYCLE_STARTED
;
1444 "Moving to RS_STATE_SEARCH_CYCLE_STARTED\n");
1445 lq_sta
->total_failed
= 0;
1446 lq_sta
->total_success
= 0;
1447 lq_sta
->flush_timer
= 0;
1448 /* mark the current column as visited */
1449 lq_sta
->visited_columns
= BIT(tbl
->column
);
1451 * Else if we've used this modulation mode enough repetitions
1452 * (regardless of elapsed time or success/failure), reset
1453 * history bitmaps and rate-specific stats for all rates in
1457 lq_sta
->table_count
++;
1458 if (lq_sta
->table_count
>=
1459 lq_sta
->table_count_limit
) {
1460 lq_sta
->table_count
= 0;
1463 "LQ: stay in table clear win\n");
1464 rs_rate_scale_clear_tbl_windows(mvm
, tbl
);
1468 /* If transitioning to allow "search", reset all history
1469 * bitmaps and stats in active table (this will become the new
1470 * "search" table). */
1471 if (lq_sta
->rs_state
== RS_STATE_SEARCH_CYCLE_STARTED
) {
1472 rs_rate_scale_clear_tbl_windows(mvm
, tbl
);
1478 * setup rate table in uCode
1480 static void rs_update_rate_tbl(struct iwl_mvm
*mvm
,
1481 struct ieee80211_sta
*sta
,
1482 struct iwl_lq_sta
*lq_sta
,
1483 struct rs_rate
*rate
)
1485 rs_fill_lq_cmd(mvm
, sta
, lq_sta
, rate
);
1486 iwl_mvm_send_lq_cmd(mvm
, &lq_sta
->lq
, false);
1489 static u8
rs_get_tid(struct iwl_lq_sta
*lq_data
,
1490 struct ieee80211_hdr
*hdr
)
1492 u8 tid
= IWL_MAX_TID_COUNT
;
1494 if (ieee80211_is_data_qos(hdr
->frame_control
)) {
1495 u8
*qc
= ieee80211_get_qos_ctl(hdr
);
1499 if (unlikely(tid
> IWL_MAX_TID_COUNT
))
1500 tid
= IWL_MAX_TID_COUNT
;
1505 static enum rs_column
rs_get_next_column(struct iwl_mvm
*mvm
,
1506 struct iwl_lq_sta
*lq_sta
,
1507 struct ieee80211_sta
*sta
,
1508 struct iwl_scale_tbl_info
*tbl
)
1511 enum rs_column next_col_id
;
1512 const struct rs_tx_column
*curr_col
= &rs_tx_columns
[tbl
->column
];
1513 const struct rs_tx_column
*next_col
;
1514 allow_column_func_t allow_func
;
1515 u8 valid_ants
= mvm
->fw
->valid_tx_ant
;
1516 const u16
*expected_tpt_tbl
;
1517 u16 tpt
, max_expected_tpt
;
1519 for (i
= 0; i
< MAX_NEXT_COLUMNS
; i
++) {
1520 next_col_id
= curr_col
->next_columns
[i
];
1522 if (next_col_id
== RS_COLUMN_INVALID
)
1525 if (lq_sta
->visited_columns
& BIT(next_col_id
)) {
1526 IWL_DEBUG_RATE(mvm
, "Skip already visited column %d\n",
1531 next_col
= &rs_tx_columns
[next_col_id
];
1533 if (!rs_is_valid_ant(valid_ants
, next_col
->ant
)) {
1535 "Skip column %d as ANT config isn't supported by chip. valid_ants 0x%x column ant 0x%x\n",
1536 next_col_id
, valid_ants
, next_col
->ant
);
1540 for (j
= 0; j
< MAX_COLUMN_CHECKS
; j
++) {
1541 allow_func
= next_col
->checks
[j
];
1542 if (allow_func
&& !allow_func(mvm
, sta
, tbl
))
1546 if (j
!= MAX_COLUMN_CHECKS
) {
1548 "Skip column %d: not allowed (check %d failed)\n",
1554 tpt
= lq_sta
->last_tpt
/ 100;
1555 expected_tpt_tbl
= rs_get_expected_tpt_table(lq_sta
, next_col
,
1556 rs_bw_from_sta_bw(sta
));
1557 if (WARN_ON_ONCE(!expected_tpt_tbl
))
1560 max_rate
= rs_get_max_allowed_rate(lq_sta
, next_col
);
1561 if (WARN_ON_ONCE(max_rate
== IWL_RATE_INVALID
))
1564 max_expected_tpt
= expected_tpt_tbl
[max_rate
];
1565 if (tpt
>= max_expected_tpt
) {
1567 "Skip column %d: can't beat current TPT. Max expected %d current %d\n",
1568 next_col_id
, max_expected_tpt
, tpt
);
1573 "Found potential column %d. Max expected %d current %d\n",
1574 next_col_id
, max_expected_tpt
, tpt
);
1578 if (i
== MAX_NEXT_COLUMNS
)
1579 return RS_COLUMN_INVALID
;
1584 static int rs_switch_to_column(struct iwl_mvm
*mvm
,
1585 struct iwl_lq_sta
*lq_sta
,
1586 struct ieee80211_sta
*sta
,
1587 enum rs_column col_id
)
1589 struct iwl_scale_tbl_info
*tbl
= &(lq_sta
->lq_info
[lq_sta
->active_tbl
]);
1590 struct iwl_scale_tbl_info
*search_tbl
=
1591 &(lq_sta
->lq_info
[(1 - lq_sta
->active_tbl
)]);
1592 struct rs_rate
*rate
= &search_tbl
->rate
;
1593 const struct rs_tx_column
*column
= &rs_tx_columns
[col_id
];
1594 const struct rs_tx_column
*curr_column
= &rs_tx_columns
[tbl
->column
];
1595 u32 sz
= (sizeof(struct iwl_scale_tbl_info
) -
1596 (sizeof(struct iwl_rate_scale_data
) * IWL_RATE_COUNT
));
1597 unsigned long rate_mask
= 0;
1600 memcpy(search_tbl
, tbl
, sz
);
1602 rate
->sgi
= column
->sgi
;
1603 rate
->ant
= column
->ant
;
1605 if (column
->mode
== RS_LEGACY
) {
1606 if (lq_sta
->band
== IEEE80211_BAND_5GHZ
)
1607 rate
->type
= LQ_LEGACY_A
;
1609 rate
->type
= LQ_LEGACY_G
;
1611 rate_mask
= lq_sta
->active_legacy_rate
;
1612 } else if (column
->mode
== RS_SISO
) {
1613 rate
->type
= lq_sta
->is_vht
? LQ_VHT_SISO
: LQ_HT_SISO
;
1614 rate_mask
= lq_sta
->active_siso_rate
;
1615 } else if (column
->mode
== RS_MIMO2
) {
1616 rate
->type
= lq_sta
->is_vht
? LQ_VHT_MIMO2
: LQ_HT_MIMO2
;
1617 rate_mask
= lq_sta
->active_mimo2_rate
;
1619 WARN_ON_ONCE("Bad column mode");
1622 rate
->bw
= rs_bw_from_sta_bw(sta
);
1623 search_tbl
->column
= col_id
;
1624 rs_set_expected_tpt_table(lq_sta
, search_tbl
);
1626 lq_sta
->visited_columns
|= BIT(col_id
);
1628 /* Get the best matching rate if we're changing modes. e.g.
1629 * SISO->MIMO, LEGACY->SISO, MIMO->SISO
1631 if (curr_column
->mode
!= column
->mode
) {
1632 rate_idx
= rs_get_best_rate(mvm
, lq_sta
, search_tbl
,
1633 rate_mask
, rate
->index
);
1635 if ((rate_idx
== IWL_RATE_INVALID
) ||
1636 !(BIT(rate_idx
) & rate_mask
)) {
1638 "can not switch with index %d"
1640 rate_idx
, rate_mask
);
1645 rate
->index
= rate_idx
;
1648 IWL_DEBUG_RATE(mvm
, "Switched to column %d: Index %d\n",
1649 col_id
, rate
->index
);
1654 rate
->type
= LQ_NONE
;
1658 static enum rs_action
rs_get_rate_action(struct iwl_mvm
*mvm
,
1659 struct iwl_scale_tbl_info
*tbl
,
1660 s32 sr
, int low
, int high
,
1662 int low_tpt
, int high_tpt
)
1664 enum rs_action action
= RS_ACTION_STAY
;
1666 if ((sr
<= RS_SR_FORCE_DECREASE
) || (current_tpt
== 0)) {
1668 "Decrease rate because of low SR\n");
1669 return RS_ACTION_DOWNSCALE
;
1672 if ((low_tpt
== IWL_INVALID_VALUE
) &&
1673 (high_tpt
== IWL_INVALID_VALUE
) &&
1674 (high
!= IWL_RATE_INVALID
)) {
1676 "No data about high/low rates. Increase rate\n");
1677 return RS_ACTION_UPSCALE
;
1680 if ((high_tpt
== IWL_INVALID_VALUE
) &&
1681 (high
!= IWL_RATE_INVALID
) &&
1682 (low_tpt
!= IWL_INVALID_VALUE
) &&
1683 (low_tpt
< current_tpt
)) {
1685 "No data about high rate and low rate is worse. Increase rate\n");
1686 return RS_ACTION_UPSCALE
;
1689 if ((high_tpt
!= IWL_INVALID_VALUE
) &&
1690 (high_tpt
> current_tpt
)) {
1692 "Higher rate is better. Increate rate\n");
1693 return RS_ACTION_UPSCALE
;
1696 if ((low_tpt
!= IWL_INVALID_VALUE
) &&
1697 (high_tpt
!= IWL_INVALID_VALUE
) &&
1698 (low_tpt
< current_tpt
) &&
1699 (high_tpt
< current_tpt
)) {
1701 "Both high and low are worse. Maintain rate\n");
1702 return RS_ACTION_STAY
;
1705 if ((low_tpt
!= IWL_INVALID_VALUE
) &&
1706 (low_tpt
> current_tpt
)) {
1708 "Lower rate is better\n");
1709 action
= RS_ACTION_DOWNSCALE
;
1713 if ((low_tpt
== IWL_INVALID_VALUE
) &&
1714 (low
!= IWL_RATE_INVALID
)) {
1716 "No data about lower rate\n");
1717 action
= RS_ACTION_DOWNSCALE
;
1721 IWL_DEBUG_RATE(mvm
, "Maintain rate\n");
1724 if ((action
== RS_ACTION_DOWNSCALE
) && (low
!= IWL_RATE_INVALID
)) {
1725 if (sr
>= RS_SR_NO_DECREASE
) {
1727 "SR is above NO DECREASE. Avoid downscale\n");
1728 action
= RS_ACTION_STAY
;
1729 } else if (current_tpt
> (100 * tbl
->expected_tpt
[low
])) {
1731 "Current TPT is higher than max expected in low rate. Avoid downscale\n");
1732 action
= RS_ACTION_STAY
;
1734 IWL_DEBUG_RATE(mvm
, "Decrease rate\n");
1741 static void rs_get_adjacent_txp(struct iwl_mvm
*mvm
, int index
,
1742 int *weaker
, int *stronger
)
1744 *weaker
= index
+ TPC_TX_POWER_STEP
;
1745 if (*weaker
> TPC_MAX_REDUCTION
)
1746 *weaker
= TPC_INVALID
;
1748 *stronger
= index
- TPC_TX_POWER_STEP
;
1750 *stronger
= TPC_INVALID
;
1753 static bool rs_tpc_allowed(struct iwl_mvm
*mvm
, struct ieee80211_vif
*vif
,
1754 struct rs_rate
*rate
, enum ieee80211_band band
)
1756 int index
= rate
->index
;
1757 bool cam
= (iwlmvm_mod_params
.power_scheme
== IWL_POWER_SCHEME_CAM
);
1758 bool sta_ps_disabled
= (vif
->type
== NL80211_IFTYPE_STATION
&&
1761 IWL_DEBUG_RATE(mvm
, "cam: %d sta_ps_disabled %d\n",
1762 cam
, sta_ps_disabled
);
1764 * allow tpc only if power management is enabled, or bt coex
1765 * activity grade allows it and we are on 2.4Ghz.
1767 if ((cam
|| sta_ps_disabled
) &&
1768 !iwl_mvm_bt_coex_is_tpc_allowed(mvm
, band
))
1771 IWL_DEBUG_RATE(mvm
, "check rate, table type: %d\n", rate
->type
);
1772 if (is_legacy(rate
))
1773 return index
== IWL_RATE_54M_INDEX
;
1775 return index
== IWL_RATE_MCS_7_INDEX
;
1777 return index
== IWL_RATE_MCS_7_INDEX
||
1778 index
== IWL_RATE_MCS_8_INDEX
||
1779 index
== IWL_RATE_MCS_9_INDEX
;
1787 TPC_ACTION_DECREASE
,
1788 TPC_ACTION_INCREASE
,
1789 TPC_ACTION_NO_RESTIRCTION
,
1792 static enum tpc_action
rs_get_tpc_action(struct iwl_mvm
*mvm
,
1793 s32 sr
, int weak
, int strong
,
1795 int weak_tpt
, int strong_tpt
)
1797 /* stay until we have valid tpt */
1798 if (current_tpt
== IWL_INVALID_VALUE
) {
1799 IWL_DEBUG_RATE(mvm
, "no current tpt. stay.\n");
1800 return TPC_ACTION_STAY
;
1803 /* Too many failures, increase txp */
1804 if (sr
<= TPC_SR_FORCE_INCREASE
|| current_tpt
== 0) {
1805 IWL_DEBUG_RATE(mvm
, "increase txp because of weak SR\n");
1806 return TPC_ACTION_NO_RESTIRCTION
;
1809 /* try decreasing first if applicable */
1810 if (weak
!= TPC_INVALID
) {
1811 if (weak_tpt
== IWL_INVALID_VALUE
&&
1812 (strong_tpt
== IWL_INVALID_VALUE
||
1813 current_tpt
>= strong_tpt
)) {
1815 "no weak txp measurement. decrease txp\n");
1816 return TPC_ACTION_DECREASE
;
1819 if (weak_tpt
> current_tpt
) {
1821 "lower txp has better tpt. decrease txp\n");
1822 return TPC_ACTION_DECREASE
;
1826 /* next, increase if needed */
1827 if (sr
< TPC_SR_NO_INCREASE
&& strong
!= TPC_INVALID
) {
1828 if (weak_tpt
== IWL_INVALID_VALUE
&&
1829 strong_tpt
!= IWL_INVALID_VALUE
&&
1830 current_tpt
< strong_tpt
) {
1832 "higher txp has better tpt. increase txp\n");
1833 return TPC_ACTION_INCREASE
;
1836 if (weak_tpt
< current_tpt
&&
1837 (strong_tpt
== IWL_INVALID_VALUE
||
1838 strong_tpt
> current_tpt
)) {
1840 "lower txp has worse tpt. increase txp\n");
1841 return TPC_ACTION_INCREASE
;
1845 IWL_DEBUG_RATE(mvm
, "no need to increase or decrease txp - stay\n");
1846 return TPC_ACTION_STAY
;
1849 static bool rs_tpc_perform(struct iwl_mvm
*mvm
,
1850 struct ieee80211_sta
*sta
,
1851 struct iwl_lq_sta
*lq_sta
,
1852 struct iwl_scale_tbl_info
*tbl
)
1854 struct iwl_mvm_sta
*mvm_sta
= (void *)sta
->drv_priv
;
1855 struct ieee80211_vif
*vif
= mvm_sta
->vif
;
1856 struct ieee80211_chanctx_conf
*chanctx_conf
;
1857 enum ieee80211_band band
;
1858 struct iwl_rate_scale_data
*window
;
1859 struct rs_rate
*rate
= &tbl
->rate
;
1860 enum tpc_action action
;
1862 u8 cur
= lq_sta
->lq
.reduced_tpc
;
1865 int weak_tpt
= IWL_INVALID_VALUE
, strong_tpt
= IWL_INVALID_VALUE
;
1867 #ifdef CONFIG_MAC80211_DEBUGFS
1868 if (lq_sta
->dbg_fixed_txp_reduction
<= TPC_MAX_REDUCTION
) {
1869 IWL_DEBUG_RATE(mvm
, "fixed tpc: %d\n",
1870 lq_sta
->dbg_fixed_txp_reduction
);
1871 lq_sta
->lq
.reduced_tpc
= lq_sta
->dbg_fixed_txp_reduction
;
1872 return cur
!= lq_sta
->dbg_fixed_txp_reduction
;
1877 chanctx_conf
= rcu_dereference(vif
->chanctx_conf
);
1878 if (WARN_ON(!chanctx_conf
))
1879 band
= IEEE80211_NUM_BANDS
;
1881 band
= chanctx_conf
->def
.chan
->band
;
1884 if (!rs_tpc_allowed(mvm
, vif
, rate
, band
)) {
1886 "tpc is not allowed. remove txp restrictions\n");
1887 lq_sta
->lq
.reduced_tpc
= TPC_NO_REDUCTION
;
1888 return cur
!= TPC_NO_REDUCTION
;
1891 rs_get_adjacent_txp(mvm
, cur
, &weak
, &strong
);
1893 /* Collect measured throughputs for current and adjacent rates */
1894 window
= tbl
->tpc_win
;
1895 sr
= window
[cur
].success_ratio
;
1896 current_tpt
= window
[cur
].average_tpt
;
1897 if (weak
!= TPC_INVALID
)
1898 weak_tpt
= window
[weak
].average_tpt
;
1899 if (strong
!= TPC_INVALID
)
1900 strong_tpt
= window
[strong
].average_tpt
;
1903 "(TPC: %d): cur_tpt %d SR %d weak %d strong %d weak_tpt %d strong_tpt %d\n",
1904 cur
, current_tpt
, sr
, weak
, strong
,
1905 weak_tpt
, strong_tpt
);
1907 action
= rs_get_tpc_action(mvm
, sr
, weak
, strong
,
1908 current_tpt
, weak_tpt
, strong_tpt
);
1910 /* override actions if we are on the edge */
1911 if (weak
== TPC_INVALID
&& action
== TPC_ACTION_DECREASE
) {
1912 IWL_DEBUG_RATE(mvm
, "already in lowest txp, stay\n");
1913 action
= TPC_ACTION_STAY
;
1914 } else if (strong
== TPC_INVALID
&&
1915 (action
== TPC_ACTION_INCREASE
||
1916 action
== TPC_ACTION_NO_RESTIRCTION
)) {
1917 IWL_DEBUG_RATE(mvm
, "already in highest txp, stay\n");
1918 action
= TPC_ACTION_STAY
;
1922 case TPC_ACTION_DECREASE
:
1923 lq_sta
->lq
.reduced_tpc
= weak
;
1925 case TPC_ACTION_INCREASE
:
1926 lq_sta
->lq
.reduced_tpc
= strong
;
1928 case TPC_ACTION_NO_RESTIRCTION
:
1929 lq_sta
->lq
.reduced_tpc
= TPC_NO_REDUCTION
;
1931 case TPC_ACTION_STAY
:
1939 * Do rate scaling and search for new modulation mode.
1941 static void rs_rate_scale_perform(struct iwl_mvm
*mvm
,
1942 struct sk_buff
*skb
,
1943 struct ieee80211_sta
*sta
,
1944 struct iwl_lq_sta
*lq_sta
)
1946 struct ieee80211_tx_info
*info
= IEEE80211_SKB_CB(skb
);
1947 struct ieee80211_hdr
*hdr
= (struct ieee80211_hdr
*)skb
->data
;
1948 int low
= IWL_RATE_INVALID
;
1949 int high
= IWL_RATE_INVALID
;
1951 struct iwl_rate_scale_data
*window
= NULL
;
1952 int current_tpt
= IWL_INVALID_VALUE
;
1953 int low_tpt
= IWL_INVALID_VALUE
;
1954 int high_tpt
= IWL_INVALID_VALUE
;
1956 enum rs_action scale_action
= RS_ACTION_STAY
;
1959 struct iwl_scale_tbl_info
*tbl
, *tbl1
;
1964 u8 tid
= IWL_MAX_TID_COUNT
;
1965 u8 prev_agg
= lq_sta
->is_agg
;
1966 struct iwl_mvm_sta
*sta_priv
= (void *)sta
->drv_priv
;
1967 struct iwl_mvm_tid_data
*tid_data
;
1968 struct rs_rate
*rate
;
1970 /* Send management frames and NO_ACK data using lowest rate. */
1971 /* TODO: this could probably be improved.. */
1972 if (!ieee80211_is_data(hdr
->frame_control
) ||
1973 info
->flags
& IEEE80211_TX_CTL_NO_ACK
)
1976 tid
= rs_get_tid(lq_sta
, hdr
);
1977 if ((tid
!= IWL_MAX_TID_COUNT
) &&
1978 (lq_sta
->tx_agg_tid_en
& (1 << tid
))) {
1979 tid_data
= &sta_priv
->tid_data
[tid
];
1980 if (tid_data
->state
== IWL_AGG_OFF
)
1989 * Select rate-scale / modulation-mode table to work with in
1990 * the rest of this function: "search" if searching for better
1991 * modulation mode, or "active" if doing rate scaling within a mode.
1993 if (!lq_sta
->search_better_tbl
)
1994 active_tbl
= lq_sta
->active_tbl
;
1996 active_tbl
= 1 - lq_sta
->active_tbl
;
1998 tbl
= &(lq_sta
->lq_info
[active_tbl
]);
2001 if (prev_agg
!= lq_sta
->is_agg
) {
2003 "Aggregation changed: prev %d current %d. Update expected TPT table\n",
2004 prev_agg
, lq_sta
->is_agg
);
2005 rs_set_expected_tpt_table(lq_sta
, tbl
);
2006 rs_rate_scale_clear_tbl_windows(mvm
, tbl
);
2009 /* current tx rate */
2010 index
= lq_sta
->last_txrate_idx
;
2012 /* rates available for this association, and for modulation mode */
2013 rate_mask
= rs_get_supported_rates(lq_sta
, rate
);
2015 if (!(BIT(index
) & rate_mask
)) {
2016 IWL_ERR(mvm
, "Current Rate is not valid\n");
2017 if (lq_sta
->search_better_tbl
) {
2018 /* revert to active table if search table is not valid*/
2019 rate
->type
= LQ_NONE
;
2020 lq_sta
->search_better_tbl
= 0;
2021 tbl
= &(lq_sta
->lq_info
[lq_sta
->active_tbl
]);
2022 rs_update_rate_tbl(mvm
, sta
, lq_sta
, &tbl
->rate
);
2027 /* Get expected throughput table and history window for current rate */
2028 if (!tbl
->expected_tpt
) {
2029 IWL_ERR(mvm
, "tbl->expected_tpt is NULL\n");
2033 /* force user max rate if set by user */
2034 if ((lq_sta
->max_rate_idx
!= -1) &&
2035 (lq_sta
->max_rate_idx
< index
)) {
2036 index
= lq_sta
->max_rate_idx
;
2038 window
= &(tbl
->win
[index
]);
2040 "Forcing user max rate %d\n",
2045 window
= &(tbl
->win
[index
]);
2048 * If there is not enough history to calculate actual average
2049 * throughput, keep analyzing results of more tx frames, without
2050 * changing rate or mode (bypass most of the rest of this function).
2051 * Set up new rate table in uCode only if old rate is not supported
2052 * in current association (use new rate found above).
2054 fail_count
= window
->counter
- window
->success_counter
;
2055 if ((fail_count
< IWL_RATE_MIN_FAILURE_TH
) &&
2056 (window
->success_counter
< IWL_RATE_MIN_SUCCESS_TH
)) {
2058 "(%s: %d): Test Window: succ %d total %d\n",
2059 rs_pretty_lq_type(rate
->type
),
2060 index
, window
->success_counter
, window
->counter
);
2062 /* Can't calculate this yet; not enough history */
2063 window
->average_tpt
= IWL_INVALID_VALUE
;
2065 /* Should we stay with this modulation mode,
2066 * or search for a new one? */
2067 rs_stay_in_table(lq_sta
, false);
2071 /* Else we have enough samples; calculate estimate of
2072 * actual average throughput */
2073 if (window
->average_tpt
!= ((window
->success_ratio
*
2074 tbl
->expected_tpt
[index
] + 64) / 128)) {
2075 window
->average_tpt
= ((window
->success_ratio
*
2076 tbl
->expected_tpt
[index
] + 64) / 128);
2079 /* If we are searching for better modulation mode, check success. */
2080 if (lq_sta
->search_better_tbl
) {
2081 /* If good success, continue using the "search" mode;
2082 * no need to send new link quality command, since we're
2083 * continuing to use the setup that we've been trying. */
2084 if (window
->average_tpt
> lq_sta
->last_tpt
) {
2086 "SWITCHING TO NEW TABLE SR: %d "
2087 "cur-tpt %d old-tpt %d\n",
2088 window
->success_ratio
,
2089 window
->average_tpt
,
2092 /* Swap tables; "search" becomes "active" */
2093 lq_sta
->active_tbl
= active_tbl
;
2094 current_tpt
= window
->average_tpt
;
2095 /* Else poor success; go back to mode in "active" table */
2098 "GOING BACK TO THE OLD TABLE: SR %d "
2099 "cur-tpt %d old-tpt %d\n",
2100 window
->success_ratio
,
2101 window
->average_tpt
,
2104 /* Nullify "search" table */
2105 rate
->type
= LQ_NONE
;
2107 /* Revert to "active" table */
2108 active_tbl
= lq_sta
->active_tbl
;
2109 tbl
= &(lq_sta
->lq_info
[active_tbl
]);
2111 /* Revert to "active" rate and throughput info */
2112 index
= tbl
->rate
.index
;
2113 current_tpt
= lq_sta
->last_tpt
;
2115 /* Need to set up a new rate table in uCode */
2119 /* Either way, we've made a decision; modulation mode
2120 * search is done, allow rate adjustment next time. */
2121 lq_sta
->search_better_tbl
= 0;
2122 done_search
= 1; /* Don't switch modes below! */
2126 /* (Else) not in search of better modulation mode, try for better
2127 * starting rate, while staying in this mode. */
2128 high_low
= rs_get_adjacent_rate(mvm
, index
, rate_mask
, rate
->type
);
2129 low
= high_low
& 0xff;
2130 high
= (high_low
>> 8) & 0xff;
2132 /* If user set max rate, dont allow higher than user constrain */
2133 if ((lq_sta
->max_rate_idx
!= -1) &&
2134 (lq_sta
->max_rate_idx
< high
))
2135 high
= IWL_RATE_INVALID
;
2137 sr
= window
->success_ratio
;
2139 /* Collect measured throughputs for current and adjacent rates */
2140 current_tpt
= window
->average_tpt
;
2141 if (low
!= IWL_RATE_INVALID
)
2142 low_tpt
= tbl
->win
[low
].average_tpt
;
2143 if (high
!= IWL_RATE_INVALID
)
2144 high_tpt
= tbl
->win
[high
].average_tpt
;
2147 "(%s: %d): cur_tpt %d SR %d low %d high %d low_tpt %d high_tpt %d\n",
2148 rs_pretty_lq_type(rate
->type
), index
, current_tpt
, sr
,
2149 low
, high
, low_tpt
, high_tpt
);
2151 scale_action
= rs_get_rate_action(mvm
, tbl
, sr
, low
, high
,
2152 current_tpt
, low_tpt
, high_tpt
);
2154 /* Force a search in case BT doesn't like us being in MIMO */
2155 if (is_mimo(rate
) &&
2156 !iwl_mvm_bt_coex_is_mimo_allowed(mvm
, sta
)) {
2158 "BT Coex forbids MIMO. Search for new config\n");
2159 rs_stay_in_table(lq_sta
, true);
2163 switch (scale_action
) {
2164 case RS_ACTION_DOWNSCALE
:
2165 /* Decrease starting rate, update uCode's rate table */
2166 if (low
!= IWL_RATE_INVALID
) {
2171 "At the bottom rate. Can't decrease\n");
2175 case RS_ACTION_UPSCALE
:
2176 /* Increase starting rate, update uCode's rate table */
2177 if (high
!= IWL_RATE_INVALID
) {
2182 "At the top rate. Can't increase\n");
2186 case RS_ACTION_STAY
:
2188 if (lq_sta
->rs_state
== RS_STATE_STAY_IN_COLUMN
)
2189 update_lq
= rs_tpc_perform(mvm
, sta
, lq_sta
, tbl
);
2196 /* Replace uCode's rate table for the destination station. */
2198 tbl
->rate
.index
= index
;
2199 rs_update_rate_tbl(mvm
, sta
, lq_sta
, &tbl
->rate
);
2202 rs_stay_in_table(lq_sta
, false);
2205 * Search for new modulation mode if we're:
2206 * 1) Not changing rates right now
2207 * 2) Not just finishing up a search
2208 * 3) Allowing a new search
2210 if (!update_lq
&& !done_search
&&
2211 lq_sta
->rs_state
== RS_STATE_SEARCH_CYCLE_STARTED
2212 && window
->counter
) {
2213 enum rs_column next_column
;
2215 /* Save current throughput to compare with "search" throughput*/
2216 lq_sta
->last_tpt
= current_tpt
;
2219 "Start Search: update_lq %d done_search %d rs_state %d win->counter %d\n",
2220 update_lq
, done_search
, lq_sta
->rs_state
,
2223 next_column
= rs_get_next_column(mvm
, lq_sta
, sta
, tbl
);
2224 if (next_column
!= RS_COLUMN_INVALID
) {
2225 int ret
= rs_switch_to_column(mvm
, lq_sta
, sta
,
2228 lq_sta
->search_better_tbl
= 1;
2231 "No more columns to explore in search cycle. Go to RS_STATE_SEARCH_CYCLE_ENDED\n");
2232 lq_sta
->rs_state
= RS_STATE_SEARCH_CYCLE_ENDED
;
2235 /* If new "search" mode was selected, set up in uCode table */
2236 if (lq_sta
->search_better_tbl
) {
2237 /* Access the "search" table, clear its history. */
2238 tbl
= &(lq_sta
->lq_info
[(1 - lq_sta
->active_tbl
)]);
2239 rs_rate_scale_clear_tbl_windows(mvm
, tbl
);
2241 /* Use new "search" start rate */
2242 index
= tbl
->rate
.index
;
2244 rs_dump_rate(mvm
, &tbl
->rate
,
2245 "Switch to SEARCH TABLE:");
2246 rs_fill_lq_cmd(mvm
, sta
, lq_sta
, &tbl
->rate
);
2247 iwl_mvm_send_lq_cmd(mvm
, &lq_sta
->lq
, false);
2253 if (done_search
&& lq_sta
->rs_state
== RS_STATE_SEARCH_CYCLE_ENDED
) {
2254 /* If the "active" (non-search) mode was legacy,
2255 * and we've tried switching antennas,
2256 * but we haven't been able to try HT modes (not available),
2257 * stay with best antenna legacy modulation for a while
2258 * before next round of mode comparisons. */
2259 tbl1
= &(lq_sta
->lq_info
[lq_sta
->active_tbl
]);
2260 if (is_legacy(&tbl1
->rate
)) {
2261 IWL_DEBUG_RATE(mvm
, "LQ: STAY in legacy table\n");
2263 if (tid
!= IWL_MAX_TID_COUNT
) {
2264 tid_data
= &sta_priv
->tid_data
[tid
];
2265 if (tid_data
->state
!= IWL_AGG_OFF
) {
2267 "Stop aggregation on tid %d\n",
2269 ieee80211_stop_tx_ba_session(sta
, tid
);
2272 rs_set_stay_in_table(mvm
, 1, lq_sta
);
2274 /* If we're in an HT mode, and all 3 mode switch actions
2275 * have been tried and compared, stay in this best modulation
2276 * mode for a while before next round of mode comparisons. */
2277 if ((lq_sta
->last_tpt
> IWL_AGG_TPT_THREHOLD
) &&
2278 (lq_sta
->tx_agg_tid_en
& (1 << tid
)) &&
2279 (tid
!= IWL_MAX_TID_COUNT
)) {
2280 tid_data
= &sta_priv
->tid_data
[tid
];
2281 if (tid_data
->state
== IWL_AGG_OFF
) {
2283 "try to aggregate tid %d\n",
2285 rs_tl_turn_on_agg(mvm
, tid
,
2289 rs_set_stay_in_table(mvm
, 0, lq_sta
);
2294 lq_sta
->last_txrate_idx
= index
;
2298 * rs_initialize_lq - Initialize a station's hardware rate table
2300 * The uCode's station table contains a table of fallback rates
2301 * for automatic fallback during transmission.
2303 * NOTE: This sets up a default set of values. These will be replaced later
2304 * if the driver's iwl-agn-rs rate scaling algorithm is used, instead of
2307 * NOTE: Run REPLY_ADD_STA command to set up station table entry, before
2308 * calling this function (which runs REPLY_TX_LINK_QUALITY_CMD,
2309 * which requires station table entry to exist).
2311 static void rs_initialize_lq(struct iwl_mvm
*mvm
,
2312 struct ieee80211_sta
*sta
,
2313 struct iwl_lq_sta
*lq_sta
,
2314 enum ieee80211_band band
,
2317 struct iwl_scale_tbl_info
*tbl
;
2318 struct rs_rate
*rate
;
2323 if (!sta
|| !lq_sta
)
2326 i
= lq_sta
->last_txrate_idx
;
2328 valid_tx_ant
= mvm
->fw
->valid_tx_ant
;
2330 if (!lq_sta
->search_better_tbl
)
2331 active_tbl
= lq_sta
->active_tbl
;
2333 active_tbl
= 1 - lq_sta
->active_tbl
;
2335 tbl
= &(lq_sta
->lq_info
[active_tbl
]);
2338 if ((i
< 0) || (i
>= IWL_RATE_COUNT
))
2342 rate
->ant
= first_antenna(valid_tx_ant
);
2344 rate
->bw
= RATE_MCS_CHAN_WIDTH_20
;
2345 if (band
== IEEE80211_BAND_5GHZ
)
2346 rate
->type
= LQ_LEGACY_A
;
2348 rate
->type
= LQ_LEGACY_G
;
2350 WARN_ON_ONCE(rate
->ant
!= ANT_A
&& rate
->ant
!= ANT_B
);
2351 if (rate
->ant
== ANT_A
)
2352 tbl
->column
= RS_COLUMN_LEGACY_ANT_A
;
2354 tbl
->column
= RS_COLUMN_LEGACY_ANT_B
;
2356 rs_set_expected_tpt_table(lq_sta
, tbl
);
2357 rs_fill_lq_cmd(mvm
, sta
, lq_sta
, rate
);
2358 /* TODO restore station should remember the lq cmd */
2359 iwl_mvm_send_lq_cmd(mvm
, &lq_sta
->lq
, init
);
2362 static void rs_get_rate(void *mvm_r
, struct ieee80211_sta
*sta
, void *mvm_sta
,
2363 struct ieee80211_tx_rate_control
*txrc
)
2365 struct sk_buff
*skb
= txrc
->skb
;
2366 struct ieee80211_supported_band
*sband
= txrc
->sband
;
2367 struct iwl_op_mode
*op_mode __maybe_unused
=
2368 (struct iwl_op_mode
*)mvm_r
;
2369 struct iwl_mvm
*mvm __maybe_unused
= IWL_OP_MODE_GET_MVM(op_mode
);
2370 struct ieee80211_tx_info
*info
= IEEE80211_SKB_CB(skb
);
2371 struct iwl_lq_sta
*lq_sta
= mvm_sta
;
2373 /* Get max rate if user set max rate */
2375 lq_sta
->max_rate_idx
= txrc
->max_rate_idx
;
2376 if ((sband
->band
== IEEE80211_BAND_5GHZ
) &&
2377 (lq_sta
->max_rate_idx
!= -1))
2378 lq_sta
->max_rate_idx
+= IWL_FIRST_OFDM_RATE
;
2379 if ((lq_sta
->max_rate_idx
< 0) ||
2380 (lq_sta
->max_rate_idx
>= IWL_RATE_COUNT
))
2381 lq_sta
->max_rate_idx
= -1;
2384 /* Treat uninitialized rate scaling data same as non-existing. */
2385 if (lq_sta
&& !lq_sta
->drv
) {
2386 IWL_DEBUG_RATE(mvm
, "Rate scaling not initialized yet.\n");
2390 /* Send management frames and NO_ACK data using lowest rate. */
2391 if (rate_control_send_low(sta
, mvm_sta
, txrc
))
2394 iwl_mvm_hwrate_to_tx_rate(lq_sta
->last_rate_n_flags
,
2395 info
->band
, &info
->control
.rates
[0]);
2397 info
->control
.rates
[0].count
= 1;
2400 static void *rs_alloc_sta(void *mvm_rate
, struct ieee80211_sta
*sta
,
2403 struct iwl_mvm_sta
*sta_priv
= (struct iwl_mvm_sta
*)sta
->drv_priv
;
2404 struct iwl_op_mode
*op_mode __maybe_unused
=
2405 (struct iwl_op_mode
*)mvm_rate
;
2406 struct iwl_mvm
*mvm __maybe_unused
= IWL_OP_MODE_GET_MVM(op_mode
);
2408 IWL_DEBUG_RATE(mvm
, "create station rate scale window\n");
2410 return &sta_priv
->lq_sta
;
2413 static int rs_vht_highest_rx_mcs_index(struct ieee80211_sta_vht_cap
*vht_cap
,
2416 u16 rx_mcs
= le16_to_cpu(vht_cap
->vht_mcs
.rx_mcs_map
) &
2417 (0x3 << (2 * (nss
- 1)));
2418 rx_mcs
>>= (2 * (nss
- 1));
2420 if (rx_mcs
== IEEE80211_VHT_MCS_SUPPORT_0_7
)
2421 return IWL_RATE_MCS_7_INDEX
;
2422 else if (rx_mcs
== IEEE80211_VHT_MCS_SUPPORT_0_8
)
2423 return IWL_RATE_MCS_8_INDEX
;
2424 else if (rx_mcs
== IEEE80211_VHT_MCS_SUPPORT_0_9
)
2425 return IWL_RATE_MCS_9_INDEX
;
2427 WARN_ON_ONCE(rx_mcs
!= IEEE80211_VHT_MCS_NOT_SUPPORTED
);
2431 static void rs_vht_set_enabled_rates(struct ieee80211_sta
*sta
,
2432 struct ieee80211_sta_vht_cap
*vht_cap
,
2433 struct iwl_lq_sta
*lq_sta
)
2436 int highest_mcs
= rs_vht_highest_rx_mcs_index(vht_cap
, 1);
2438 if (highest_mcs
>= IWL_RATE_MCS_0_INDEX
) {
2439 for (i
= IWL_RATE_MCS_0_INDEX
; i
<= highest_mcs
; i
++) {
2440 if (i
== IWL_RATE_9M_INDEX
)
2443 /* VHT MCS9 isn't valid for 20Mhz for NSS=1,2 */
2444 if (i
== IWL_RATE_MCS_9_INDEX
&&
2445 sta
->bandwidth
== IEEE80211_STA_RX_BW_20
)
2448 lq_sta
->active_siso_rate
|= BIT(i
);
2452 if (sta
->rx_nss
< 2)
2455 highest_mcs
= rs_vht_highest_rx_mcs_index(vht_cap
, 2);
2456 if (highest_mcs
>= IWL_RATE_MCS_0_INDEX
) {
2457 for (i
= IWL_RATE_MCS_0_INDEX
; i
<= highest_mcs
; i
++) {
2458 if (i
== IWL_RATE_9M_INDEX
)
2461 /* VHT MCS9 isn't valid for 20Mhz for NSS=1,2 */
2462 if (i
== IWL_RATE_MCS_9_INDEX
&&
2463 sta
->bandwidth
== IEEE80211_STA_RX_BW_20
)
2466 lq_sta
->active_mimo2_rate
|= BIT(i
);
2471 #ifdef CONFIG_IWLWIFI_DEBUGFS
2472 static void iwl_mvm_reset_frame_stats(struct iwl_mvm
*mvm
,
2473 struct iwl_mvm_frame_stats
*stats
)
2475 spin_lock_bh(&mvm
->drv_stats_lock
);
2476 memset(stats
, 0, sizeof(*stats
));
2477 spin_unlock_bh(&mvm
->drv_stats_lock
);
2480 void iwl_mvm_update_frame_stats(struct iwl_mvm
*mvm
,
2481 struct iwl_mvm_frame_stats
*stats
,
2484 u8 nss
= 0, mcs
= 0;
2486 spin_lock(&mvm
->drv_stats_lock
);
2489 stats
->agg_frames
++;
2491 stats
->success_frames
++;
2493 switch (rate
& RATE_MCS_CHAN_WIDTH_MSK
) {
2494 case RATE_MCS_CHAN_WIDTH_20
:
2495 stats
->bw_20_frames
++;
2497 case RATE_MCS_CHAN_WIDTH_40
:
2498 stats
->bw_40_frames
++;
2500 case RATE_MCS_CHAN_WIDTH_80
:
2501 stats
->bw_80_frames
++;
2504 WARN_ONCE(1, "bad BW. rate 0x%x", rate
);
2507 if (rate
& RATE_MCS_HT_MSK
) {
2509 mcs
= rate
& RATE_HT_MCS_RATE_CODE_MSK
;
2510 nss
= ((rate
& RATE_HT_MCS_NSS_MSK
) >> RATE_HT_MCS_NSS_POS
) + 1;
2511 } else if (rate
& RATE_MCS_VHT_MSK
) {
2512 stats
->vht_frames
++;
2513 mcs
= rate
& RATE_VHT_MCS_RATE_CODE_MSK
;
2514 nss
= ((rate
& RATE_VHT_MCS_NSS_MSK
) >>
2515 RATE_VHT_MCS_NSS_POS
) + 1;
2517 stats
->legacy_frames
++;
2521 stats
->siso_frames
++;
2523 stats
->mimo2_frames
++;
2525 if (rate
& RATE_MCS_SGI_MSK
)
2526 stats
->sgi_frames
++;
2528 stats
->ngi_frames
++;
2530 stats
->last_rates
[stats
->last_frame_idx
] = rate
;
2531 stats
->last_frame_idx
= (stats
->last_frame_idx
+ 1) %
2532 ARRAY_SIZE(stats
->last_rates
);
2534 spin_unlock(&mvm
->drv_stats_lock
);
2539 * Called after adding a new station to initialize rate scaling
2541 void iwl_mvm_rs_rate_init(struct iwl_mvm
*mvm
, struct ieee80211_sta
*sta
,
2542 enum ieee80211_band band
, bool init
)
2545 struct ieee80211_hw
*hw
= mvm
->hw
;
2546 struct ieee80211_sta_ht_cap
*ht_cap
= &sta
->ht_cap
;
2547 struct ieee80211_sta_vht_cap
*vht_cap
= &sta
->vht_cap
;
2548 struct iwl_mvm_sta
*sta_priv
;
2549 struct iwl_lq_sta
*lq_sta
;
2550 struct ieee80211_supported_band
*sband
;
2551 unsigned long supp
; /* must be unsigned long for for_each_set_bit */
2553 sta_priv
= (struct iwl_mvm_sta
*)sta
->drv_priv
;
2554 lq_sta
= &sta_priv
->lq_sta
;
2555 memset(lq_sta
, 0, sizeof(*lq_sta
));
2557 sband
= hw
->wiphy
->bands
[band
];
2559 lq_sta
->lq
.sta_id
= sta_priv
->sta_id
;
2561 for (j
= 0; j
< LQ_SIZE
; j
++)
2562 rs_rate_scale_clear_tbl_windows(mvm
, &lq_sta
->lq_info
[j
]);
2564 lq_sta
->flush_timer
= 0;
2565 lq_sta
->last_tx
= jiffies
;
2568 "LQ: *** rate scale station global init for station %d ***\n",
2570 /* TODO: what is a good starting rate for STA? About middle? Maybe not
2571 * the lowest or the highest rate.. Could consider using RSSI from
2572 * previous packets? Need to have IEEE 802.1X auth succeed immediately
2575 lq_sta
->max_rate_idx
= -1;
2576 lq_sta
->missed_rate_counter
= IWL_MISSED_RATE_MAX
;
2577 lq_sta
->band
= sband
->band
;
2579 * active legacy rates as per supported rates bitmap
2581 supp
= sta
->supp_rates
[sband
->band
];
2582 lq_sta
->active_legacy_rate
= 0;
2583 for_each_set_bit(i
, &supp
, BITS_PER_LONG
)
2584 lq_sta
->active_legacy_rate
|= BIT(sband
->bitrates
[i
].hw_value
);
2586 /* TODO: should probably account for rx_highest for both HT/VHT */
2587 if (!vht_cap
|| !vht_cap
->vht_supported
) {
2588 /* active_siso_rate mask includes 9 MBits (bit 5),
2589 * and CCK (bits 0-3), supp_rates[] does not;
2590 * shift to convert format, force 9 MBits off.
2592 lq_sta
->active_siso_rate
= ht_cap
->mcs
.rx_mask
[0] << 1;
2593 lq_sta
->active_siso_rate
|= ht_cap
->mcs
.rx_mask
[0] & 0x1;
2594 lq_sta
->active_siso_rate
&= ~((u16
)0x2);
2595 lq_sta
->active_siso_rate
<<= IWL_FIRST_OFDM_RATE
;
2598 lq_sta
->active_mimo2_rate
= ht_cap
->mcs
.rx_mask
[1] << 1;
2599 lq_sta
->active_mimo2_rate
|= ht_cap
->mcs
.rx_mask
[1] & 0x1;
2600 lq_sta
->active_mimo2_rate
&= ~((u16
)0x2);
2601 lq_sta
->active_mimo2_rate
<<= IWL_FIRST_OFDM_RATE
;
2603 lq_sta
->is_vht
= false;
2605 rs_vht_set_enabled_rates(sta
, vht_cap
, lq_sta
);
2606 lq_sta
->is_vht
= true;
2609 lq_sta
->max_legacy_rate_idx
= find_last_bit(&lq_sta
->active_legacy_rate
,
2611 lq_sta
->max_siso_rate_idx
= find_last_bit(&lq_sta
->active_siso_rate
,
2613 lq_sta
->max_mimo2_rate_idx
= find_last_bit(&lq_sta
->active_mimo2_rate
,
2616 IWL_DEBUG_RATE(mvm
, "RATE MASK: LEGACY=%lX SISO=%lX MIMO2=%lX VHT=%d\n",
2617 lq_sta
->active_legacy_rate
,
2618 lq_sta
->active_siso_rate
,
2619 lq_sta
->active_mimo2_rate
,
2621 IWL_DEBUG_RATE(mvm
, "MAX RATE: LEGACY=%d SISO=%d MIMO2=%d\n",
2622 lq_sta
->max_legacy_rate_idx
,
2623 lq_sta
->max_siso_rate_idx
,
2624 lq_sta
->max_mimo2_rate_idx
);
2626 /* These values will be overridden later */
2627 lq_sta
->lq
.single_stream_ant_msk
=
2628 first_antenna(mvm
->fw
->valid_tx_ant
);
2629 lq_sta
->lq
.dual_stream_ant_msk
= ANT_AB
;
2631 /* as default allow aggregation for all tids */
2632 lq_sta
->tx_agg_tid_en
= IWL_AGG_ALL_TID
;
2635 /* Set last_txrate_idx to lowest rate */
2636 lq_sta
->last_txrate_idx
= rate_lowest_index(sband
, sta
);
2637 if (sband
->band
== IEEE80211_BAND_5GHZ
)
2638 lq_sta
->last_txrate_idx
+= IWL_FIRST_OFDM_RATE
;
2640 #ifdef CONFIG_MAC80211_DEBUGFS
2641 lq_sta
->dbg_fixed_rate
= 0;
2642 lq_sta
->dbg_fixed_txp_reduction
= TPC_INVALID
;
2644 #ifdef CONFIG_IWLWIFI_DEBUGFS
2645 iwl_mvm_reset_frame_stats(mvm
, &mvm
->drv_rx_stats
);
2647 rs_initialize_lq(mvm
, sta
, lq_sta
, band
, init
);
2650 static void rs_rate_update(void *mvm_r
,
2651 struct ieee80211_supported_band
*sband
,
2652 struct cfg80211_chan_def
*chandef
,
2653 struct ieee80211_sta
*sta
, void *priv_sta
,
2657 struct iwl_op_mode
*op_mode
=
2658 (struct iwl_op_mode
*)mvm_r
;
2659 struct iwl_mvm
*mvm
= IWL_OP_MODE_GET_MVM(op_mode
);
2661 /* Stop any ongoing aggregations as rs starts off assuming no agg */
2662 for (tid
= 0; tid
< IWL_MAX_TID_COUNT
; tid
++)
2663 ieee80211_stop_tx_ba_session(sta
, tid
);
2665 iwl_mvm_rs_rate_init(mvm
, sta
, sband
->band
, false);
2668 #ifdef CONFIG_MAC80211_DEBUGFS
2669 static void rs_build_rates_table_from_fixed(struct iwl_mvm
*mvm
,
2670 struct iwl_lq_cmd
*lq_cmd
,
2671 enum ieee80211_band band
,
2674 struct rs_rate rate
;
2676 int num_rates
= ARRAY_SIZE(lq_cmd
->rs_table
);
2677 __le32 ucode_rate_le32
= cpu_to_le32(ucode_rate
);
2679 for (i
= 0; i
< num_rates
; i
++)
2680 lq_cmd
->rs_table
[i
] = ucode_rate_le32
;
2682 rs_rate_from_ucode_rate(ucode_rate
, band
, &rate
);
2685 lq_cmd
->mimo_delim
= num_rates
- 1;
2687 lq_cmd
->mimo_delim
= 0;
2689 #endif /* CONFIG_MAC80211_DEBUGFS */
2691 static void rs_fill_rates_for_column(struct iwl_mvm
*mvm
,
2692 struct iwl_lq_sta
*lq_sta
,
2693 struct rs_rate
*rate
,
2694 __le32
*rs_table
, int *rs_table_index
,
2695 int num_rates
, int num_retries
,
2696 u8 valid_tx_ant
, bool toggle_ant
)
2700 bool bottom_reached
= false;
2701 int prev_rate_idx
= rate
->index
;
2702 int end
= LINK_QUAL_MAX_RETRY_NUM
;
2703 int index
= *rs_table_index
;
2705 for (i
= 0; i
< num_rates
&& index
< end
; i
++) {
2706 ucode_rate
= cpu_to_le32(ucode_rate_from_rs_rate(mvm
, rate
));
2707 for (j
= 0; j
< num_retries
&& index
< end
; j
++, index
++)
2708 rs_table
[index
] = ucode_rate
;
2711 rs_toggle_antenna(valid_tx_ant
, rate
);
2713 prev_rate_idx
= rate
->index
;
2714 bottom_reached
= rs_get_lower_rate_in_column(lq_sta
, rate
);
2715 if (bottom_reached
&& !is_legacy(rate
))
2719 if (!bottom_reached
)
2720 rate
->index
= prev_rate_idx
;
2722 *rs_table_index
= index
;
2725 /* Building the rate table is non trivial. When we're in MIMO2/VHT/80Mhz/SGI
2726 * column the rate table should look like this:
2728 * rate[0] 0x400D019 VHT | ANT: AB BW: 80Mhz MCS: 9 NSS: 2 SGI
2729 * rate[1] 0x400D019 VHT | ANT: AB BW: 80Mhz MCS: 9 NSS: 2 SGI
2730 * rate[2] 0x400D018 VHT | ANT: AB BW: 80Mhz MCS: 8 NSS: 2 SGI
2731 * rate[3] 0x400D018 VHT | ANT: AB BW: 80Mhz MCS: 8 NSS: 2 SGI
2732 * rate[4] 0x400D017 VHT | ANT: AB BW: 80Mhz MCS: 7 NSS: 2 SGI
2733 * rate[5] 0x400D017 VHT | ANT: AB BW: 80Mhz MCS: 7 NSS: 2 SGI
2734 * rate[6] 0x4005007 VHT | ANT: A BW: 80Mhz MCS: 7 NSS: 1 NGI
2735 * rate[7] 0x4009006 VHT | ANT: B BW: 80Mhz MCS: 6 NSS: 1 NGI
2736 * rate[8] 0x4005005 VHT | ANT: A BW: 80Mhz MCS: 5 NSS: 1 NGI
2737 * rate[9] 0x800B Legacy | ANT: B Rate: 36 Mbps
2738 * rate[10] 0x4009 Legacy | ANT: A Rate: 24 Mbps
2739 * rate[11] 0x8007 Legacy | ANT: B Rate: 18 Mbps
2740 * rate[12] 0x4005 Legacy | ANT: A Rate: 12 Mbps
2741 * rate[13] 0x800F Legacy | ANT: B Rate: 9 Mbps
2742 * rate[14] 0x400D Legacy | ANT: A Rate: 6 Mbps
2743 * rate[15] 0x800D Legacy | ANT: B Rate: 6 Mbps
2745 static void rs_build_rates_table(struct iwl_mvm
*mvm
,
2746 struct iwl_lq_sta
*lq_sta
,
2747 const struct rs_rate
*initial_rate
)
2749 struct rs_rate rate
;
2750 int num_rates
, num_retries
, index
= 0;
2751 u8 valid_tx_ant
= 0;
2752 struct iwl_lq_cmd
*lq_cmd
= &lq_sta
->lq
;
2753 bool toggle_ant
= false;
2755 memcpy(&rate
, initial_rate
, sizeof(rate
));
2757 valid_tx_ant
= mvm
->fw
->valid_tx_ant
;
2759 if (is_siso(&rate
)) {
2760 num_rates
= RS_INITIAL_SISO_NUM_RATES
;
2761 num_retries
= RS_HT_VHT_RETRIES_PER_RATE
;
2762 } else if (is_mimo(&rate
)) {
2763 num_rates
= RS_INITIAL_MIMO_NUM_RATES
;
2764 num_retries
= RS_HT_VHT_RETRIES_PER_RATE
;
2766 num_rates
= RS_INITIAL_LEGACY_NUM_RATES
;
2767 num_retries
= RS_LEGACY_RETRIES_PER_RATE
;
2771 rs_fill_rates_for_column(mvm
, lq_sta
, &rate
, lq_cmd
->rs_table
, &index
,
2772 num_rates
, num_retries
, valid_tx_ant
,
2775 rs_get_lower_rate_down_column(lq_sta
, &rate
);
2777 if (is_siso(&rate
)) {
2778 num_rates
= RS_SECONDARY_SISO_NUM_RATES
;
2779 num_retries
= RS_SECONDARY_SISO_RETRIES
;
2780 lq_cmd
->mimo_delim
= index
;
2781 } else if (is_legacy(&rate
)) {
2782 num_rates
= RS_SECONDARY_LEGACY_NUM_RATES
;
2783 num_retries
= RS_LEGACY_RETRIES_PER_RATE
;
2790 rs_fill_rates_for_column(mvm
, lq_sta
, &rate
, lq_cmd
->rs_table
, &index
,
2791 num_rates
, num_retries
, valid_tx_ant
,
2794 rs_get_lower_rate_down_column(lq_sta
, &rate
);
2796 num_rates
= RS_SECONDARY_LEGACY_NUM_RATES
;
2797 num_retries
= RS_LEGACY_RETRIES_PER_RATE
;
2799 rs_fill_rates_for_column(mvm
, lq_sta
, &rate
, lq_cmd
->rs_table
, &index
,
2800 num_rates
, num_retries
, valid_tx_ant
,
2805 static void rs_fill_lq_cmd(struct iwl_mvm
*mvm
,
2806 struct ieee80211_sta
*sta
,
2807 struct iwl_lq_sta
*lq_sta
,
2808 const struct rs_rate
*initial_rate
)
2810 struct iwl_lq_cmd
*lq_cmd
= &lq_sta
->lq
;
2811 u8 ant
= initial_rate
->ant
;
2813 #ifdef CONFIG_MAC80211_DEBUGFS
2814 if (lq_sta
->dbg_fixed_rate
) {
2815 rs_build_rates_table_from_fixed(mvm
, lq_cmd
,
2817 lq_sta
->dbg_fixed_rate
);
2818 lq_cmd
->reduced_tpc
= 0;
2819 ant
= (lq_sta
->dbg_fixed_rate
& RATE_MCS_ANT_ABC_MSK
) >>
2823 rs_build_rates_table(mvm
, lq_sta
, initial_rate
);
2825 if (num_of_ant(ant
) == 1)
2826 lq_cmd
->single_stream_ant_msk
= ant
;
2828 lq_cmd
->agg_frame_cnt_limit
= LINK_QUAL_AGG_FRAME_LIMIT_DEF
;
2829 lq_cmd
->agg_disable_start_th
= LINK_QUAL_AGG_DISABLE_START_DEF
;
2831 lq_cmd
->agg_time_limit
=
2832 cpu_to_le16(LINK_QUAL_AGG_TIME_LIMIT_DEF
);
2835 lq_cmd
->agg_time_limit
=
2836 cpu_to_le16(iwl_mvm_coex_agg_time_limit(mvm
, sta
));
2839 static void *rs_alloc(struct ieee80211_hw
*hw
, struct dentry
*debugfsdir
)
2843 /* rate scale requires free function to be implemented */
2844 static void rs_free(void *mvm_rate
)
2849 static void rs_free_sta(void *mvm_r
, struct ieee80211_sta
*sta
,
2852 struct iwl_op_mode
*op_mode __maybe_unused
= mvm_r
;
2853 struct iwl_mvm
*mvm __maybe_unused
= IWL_OP_MODE_GET_MVM(op_mode
);
2855 IWL_DEBUG_RATE(mvm
, "enter\n");
2856 IWL_DEBUG_RATE(mvm
, "leave\n");
2859 #ifdef CONFIG_MAC80211_DEBUGFS
2860 int rs_pretty_print_rate(char *buf
, const u32 rate
)
2864 u8 mcs
= 0, nss
= 0;
2865 u8 ant
= (rate
& RATE_MCS_ANT_ABC_MSK
) >> RATE_MCS_ANT_POS
;
2867 if (!(rate
& RATE_MCS_HT_MSK
) &&
2868 !(rate
& RATE_MCS_VHT_MSK
)) {
2869 int index
= iwl_hwrate_to_plcp_idx(rate
);
2871 return sprintf(buf
, "Legacy | ANT: %s Rate: %s Mbps\n",
2873 index
== IWL_RATE_INVALID
? "BAD" :
2874 iwl_rate_mcs
[index
].mbps
);
2877 if (rate
& RATE_MCS_VHT_MSK
) {
2879 mcs
= rate
& RATE_VHT_MCS_RATE_CODE_MSK
;
2880 nss
= ((rate
& RATE_VHT_MCS_NSS_MSK
)
2881 >> RATE_VHT_MCS_NSS_POS
) + 1;
2882 } else if (rate
& RATE_MCS_HT_MSK
) {
2884 mcs
= rate
& RATE_HT_MCS_INDEX_MSK
;
2886 type
= "Unknown"; /* shouldn't happen */
2889 switch (rate
& RATE_MCS_CHAN_WIDTH_MSK
) {
2890 case RATE_MCS_CHAN_WIDTH_20
:
2893 case RATE_MCS_CHAN_WIDTH_40
:
2896 case RATE_MCS_CHAN_WIDTH_80
:
2899 case RATE_MCS_CHAN_WIDTH_160
:
2906 return sprintf(buf
, "%s | ANT: %s BW: %s MCS: %d NSS: %d %s%s%s%s%s\n",
2907 type
, rs_pretty_ant(ant
), bw
, mcs
, nss
,
2908 (rate
& RATE_MCS_SGI_MSK
) ? "SGI " : "NGI ",
2909 (rate
& RATE_MCS_HT_STBC_MSK
) ? "STBC " : "",
2910 (rate
& RATE_MCS_LDPC_MSK
) ? "LDPC " : "",
2911 (rate
& RATE_MCS_BF_MSK
) ? "BF " : "",
2912 (rate
& RATE_MCS_ZLF_MSK
) ? "ZLF " : "");
2916 * Program the device to use fixed rate for frame transmit
2917 * This is for debugging/testing only
2918 * once the device start use fixed rate, we need to reload the module
2919 * to being back the normal operation.
2921 static void rs_program_fix_rate(struct iwl_mvm
*mvm
,
2922 struct iwl_lq_sta
*lq_sta
)
2924 lq_sta
->active_legacy_rate
= 0x0FFF; /* 1 - 54 MBits, includes CCK */
2925 lq_sta
->active_siso_rate
= 0x1FD0; /* 6 - 60 MBits, no 9, no CCK */
2926 lq_sta
->active_mimo2_rate
= 0x1FD0; /* 6 - 60 MBits, no 9, no CCK */
2928 IWL_DEBUG_RATE(mvm
, "sta_id %d rate 0x%X\n",
2929 lq_sta
->lq
.sta_id
, lq_sta
->dbg_fixed_rate
);
2931 if (lq_sta
->dbg_fixed_rate
) {
2932 struct rs_rate rate
;
2933 rs_rate_from_ucode_rate(lq_sta
->dbg_fixed_rate
,
2934 lq_sta
->band
, &rate
);
2935 rs_fill_lq_cmd(mvm
, NULL
, lq_sta
, &rate
);
2936 iwl_mvm_send_lq_cmd(lq_sta
->drv
, &lq_sta
->lq
, false);
2940 static ssize_t
rs_sta_dbgfs_scale_table_write(struct file
*file
,
2941 const char __user
*user_buf
, size_t count
, loff_t
*ppos
)
2943 struct iwl_lq_sta
*lq_sta
= file
->private_data
;
2944 struct iwl_mvm
*mvm
;
2950 memset(buf
, 0, sizeof(buf
));
2951 buf_size
= min(count
, sizeof(buf
) - 1);
2952 if (copy_from_user(buf
, user_buf
, buf_size
))
2955 if (sscanf(buf
, "%x", &parsed_rate
) == 1)
2956 lq_sta
->dbg_fixed_rate
= parsed_rate
;
2958 lq_sta
->dbg_fixed_rate
= 0;
2960 rs_program_fix_rate(mvm
, lq_sta
);
2965 static ssize_t
rs_sta_dbgfs_scale_table_read(struct file
*file
,
2966 char __user
*user_buf
, size_t count
, loff_t
*ppos
)
2973 struct iwl_lq_sta
*lq_sta
= file
->private_data
;
2974 struct iwl_mvm
*mvm
;
2975 struct iwl_scale_tbl_info
*tbl
= &(lq_sta
->lq_info
[lq_sta
->active_tbl
]);
2976 struct rs_rate
*rate
= &tbl
->rate
;
2978 buff
= kmalloc(2048, GFP_KERNEL
);
2982 desc
+= sprintf(buff
+desc
, "sta_id %d\n", lq_sta
->lq
.sta_id
);
2983 desc
+= sprintf(buff
+desc
, "failed=%d success=%d rate=0%lX\n",
2984 lq_sta
->total_failed
, lq_sta
->total_success
,
2985 lq_sta
->active_legacy_rate
);
2986 desc
+= sprintf(buff
+desc
, "fixed rate 0x%X\n",
2987 lq_sta
->dbg_fixed_rate
);
2988 desc
+= sprintf(buff
+desc
, "valid_tx_ant %s%s%s\n",
2989 (mvm
->fw
->valid_tx_ant
& ANT_A
) ? "ANT_A," : "",
2990 (mvm
->fw
->valid_tx_ant
& ANT_B
) ? "ANT_B," : "",
2991 (mvm
->fw
->valid_tx_ant
& ANT_C
) ? "ANT_C" : "");
2992 desc
+= sprintf(buff
+desc
, "lq type %s\n",
2993 (is_legacy(rate
)) ? "legacy" :
2994 is_vht(rate
) ? "VHT" : "HT");
2995 if (!is_legacy(rate
)) {
2996 desc
+= sprintf(buff
+desc
, " %s",
2997 (is_siso(rate
)) ? "SISO" : "MIMO2");
2998 desc
+= sprintf(buff
+desc
, " %s",
2999 (is_ht20(rate
)) ? "20MHz" :
3000 (is_ht40(rate
)) ? "40MHz" :
3001 (is_ht80(rate
)) ? "80Mhz" : "BAD BW");
3002 desc
+= sprintf(buff
+desc
, " %s %s\n",
3003 (rate
->sgi
) ? "SGI" : "NGI",
3004 (lq_sta
->is_agg
) ? "AGG on" : "");
3006 desc
+= sprintf(buff
+desc
, "last tx rate=0x%X\n",
3007 lq_sta
->last_rate_n_flags
);
3008 desc
+= sprintf(buff
+desc
,
3009 "general: flags=0x%X mimo-d=%d s-ant=0x%x d-ant=0x%x\n",
3011 lq_sta
->lq
.mimo_delim
,
3012 lq_sta
->lq
.single_stream_ant_msk
,
3013 lq_sta
->lq
.dual_stream_ant_msk
);
3015 desc
+= sprintf(buff
+desc
,
3016 "agg: time_limit=%d dist_start_th=%d frame_cnt_limit=%d\n",
3017 le16_to_cpu(lq_sta
->lq
.agg_time_limit
),
3018 lq_sta
->lq
.agg_disable_start_th
,
3019 lq_sta
->lq
.agg_frame_cnt_limit
);
3021 desc
+= sprintf(buff
+desc
, "reduced tpc=%d\n", lq_sta
->lq
.reduced_tpc
);
3022 desc
+= sprintf(buff
+desc
,
3023 "Start idx [0]=0x%x [1]=0x%x [2]=0x%x [3]=0x%x\n",
3024 lq_sta
->lq
.initial_rate_index
[0],
3025 lq_sta
->lq
.initial_rate_index
[1],
3026 lq_sta
->lq
.initial_rate_index
[2],
3027 lq_sta
->lq
.initial_rate_index
[3]);
3029 for (i
= 0; i
< LINK_QUAL_MAX_RETRY_NUM
; i
++) {
3030 u32 r
= le32_to_cpu(lq_sta
->lq
.rs_table
[i
]);
3032 desc
+= sprintf(buff
+desc
, " rate[%d] 0x%X ", i
, r
);
3033 desc
+= rs_pretty_print_rate(buff
+desc
, r
);
3036 ret
= simple_read_from_buffer(user_buf
, count
, ppos
, buff
, desc
);
3041 static const struct file_operations rs_sta_dbgfs_scale_table_ops
= {
3042 .write
= rs_sta_dbgfs_scale_table_write
,
3043 .read
= rs_sta_dbgfs_scale_table_read
,
3044 .open
= simple_open
,
3045 .llseek
= default_llseek
,
3047 static ssize_t
rs_sta_dbgfs_stats_table_read(struct file
*file
,
3048 char __user
*user_buf
, size_t count
, loff_t
*ppos
)
3054 struct iwl_scale_tbl_info
*tbl
;
3055 struct rs_rate
*rate
;
3056 struct iwl_lq_sta
*lq_sta
= file
->private_data
;
3058 buff
= kmalloc(1024, GFP_KERNEL
);
3062 for (i
= 0; i
< LQ_SIZE
; i
++) {
3063 tbl
= &(lq_sta
->lq_info
[i
]);
3065 desc
+= sprintf(buff
+desc
,
3066 "%s type=%d SGI=%d BW=%s DUP=0\n"
3068 lq_sta
->active_tbl
== i
? "*" : "x",
3071 is_ht20(rate
) ? "20Mhz" :
3072 is_ht40(rate
) ? "40Mhz" :
3073 is_ht80(rate
) ? "80Mhz" : "ERR",
3075 for (j
= 0; j
< IWL_RATE_COUNT
; j
++) {
3076 desc
+= sprintf(buff
+desc
,
3077 "counter=%d success=%d %%=%d\n",
3078 tbl
->win
[j
].counter
,
3079 tbl
->win
[j
].success_counter
,
3080 tbl
->win
[j
].success_ratio
);
3083 ret
= simple_read_from_buffer(user_buf
, count
, ppos
, buff
, desc
);
3088 static const struct file_operations rs_sta_dbgfs_stats_table_ops
= {
3089 .read
= rs_sta_dbgfs_stats_table_read
,
3090 .open
= simple_open
,
3091 .llseek
= default_llseek
,
3094 static ssize_t
rs_sta_dbgfs_drv_tx_stats_read(struct file
*file
,
3095 char __user
*user_buf
,
3096 size_t count
, loff_t
*ppos
)
3098 static const char * const column_name
[] = {
3099 [RS_COLUMN_LEGACY_ANT_A
] = "LEGACY_ANT_A",
3100 [RS_COLUMN_LEGACY_ANT_B
] = "LEGACY_ANT_B",
3101 [RS_COLUMN_SISO_ANT_A
] = "SISO_ANT_A",
3102 [RS_COLUMN_SISO_ANT_B
] = "SISO_ANT_B",
3103 [RS_COLUMN_SISO_ANT_A_SGI
] = "SISO_ANT_A_SGI",
3104 [RS_COLUMN_SISO_ANT_B_SGI
] = "SISO_ANT_B_SGI",
3105 [RS_COLUMN_MIMO2
] = "MIMO2",
3106 [RS_COLUMN_MIMO2_SGI
] = "MIMO2_SGI",
3109 static const char * const rate_name
[] = {
3110 [IWL_RATE_1M_INDEX
] = "1M",
3111 [IWL_RATE_2M_INDEX
] = "2M",
3112 [IWL_RATE_5M_INDEX
] = "5.5M",
3113 [IWL_RATE_11M_INDEX
] = "11M",
3114 [IWL_RATE_6M_INDEX
] = "6M|MCS0",
3115 [IWL_RATE_9M_INDEX
] = "9M",
3116 [IWL_RATE_12M_INDEX
] = "12M|MCS1",
3117 [IWL_RATE_18M_INDEX
] = "18M|MCS2",
3118 [IWL_RATE_24M_INDEX
] = "24M|MCS3",
3119 [IWL_RATE_36M_INDEX
] = "36M|MCS4",
3120 [IWL_RATE_48M_INDEX
] = "48M|MCS5",
3121 [IWL_RATE_54M_INDEX
] = "54M|MCS6",
3122 [IWL_RATE_MCS_7_INDEX
] = "MCS7",
3123 [IWL_RATE_MCS_8_INDEX
] = "MCS8",
3124 [IWL_RATE_MCS_9_INDEX
] = "MCS9",
3127 char *buff
, *pos
, *endpos
;
3130 struct iwl_lq_sta
*lq_sta
= file
->private_data
;
3131 struct rs_rate_stats
*stats
;
3132 static const size_t bufsz
= 1024;
3134 buff
= kmalloc(bufsz
, GFP_KERNEL
);
3139 endpos
= pos
+ bufsz
;
3141 pos
+= scnprintf(pos
, endpos
- pos
, "COLUMN,");
3142 for (rate
= 0; rate
< IWL_RATE_COUNT
; rate
++)
3143 pos
+= scnprintf(pos
, endpos
- pos
, "%s,", rate_name
[rate
]);
3144 pos
+= scnprintf(pos
, endpos
- pos
, "\n");
3146 for (col
= 0; col
< RS_COLUMN_COUNT
; col
++) {
3147 pos
+= scnprintf(pos
, endpos
- pos
,
3148 "%s,", column_name
[col
]);
3150 for (rate
= 0; rate
< IWL_RATE_COUNT
; rate
++) {
3151 stats
= &(lq_sta
->tx_stats
[col
][rate
]);
3152 pos
+= scnprintf(pos
, endpos
- pos
,
3157 pos
+= scnprintf(pos
, endpos
- pos
, "\n");
3160 ret
= simple_read_from_buffer(user_buf
, count
, ppos
, buff
, pos
- buff
);
3165 static ssize_t
rs_sta_dbgfs_drv_tx_stats_write(struct file
*file
,
3166 const char __user
*user_buf
,
3167 size_t count
, loff_t
*ppos
)
3169 struct iwl_lq_sta
*lq_sta
= file
->private_data
;
3170 memset(lq_sta
->tx_stats
, 0, sizeof(lq_sta
->tx_stats
));
3175 static const struct file_operations rs_sta_dbgfs_drv_tx_stats_ops
= {
3176 .read
= rs_sta_dbgfs_drv_tx_stats_read
,
3177 .write
= rs_sta_dbgfs_drv_tx_stats_write
,
3178 .open
= simple_open
,
3179 .llseek
= default_llseek
,
3182 static void rs_add_debugfs(void *mvm
, void *mvm_sta
, struct dentry
*dir
)
3184 struct iwl_lq_sta
*lq_sta
= mvm_sta
;
3185 lq_sta
->rs_sta_dbgfs_scale_table_file
=
3186 debugfs_create_file("rate_scale_table", S_IRUSR
| S_IWUSR
, dir
,
3187 lq_sta
, &rs_sta_dbgfs_scale_table_ops
);
3188 lq_sta
->rs_sta_dbgfs_stats_table_file
=
3189 debugfs_create_file("rate_stats_table", S_IRUSR
, dir
,
3190 lq_sta
, &rs_sta_dbgfs_stats_table_ops
);
3191 lq_sta
->rs_sta_dbgfs_drv_tx_stats_file
=
3192 debugfs_create_file("drv_tx_stats", S_IRUSR
| S_IWUSR
, dir
,
3193 lq_sta
, &rs_sta_dbgfs_drv_tx_stats_ops
);
3194 lq_sta
->rs_sta_dbgfs_tx_agg_tid_en_file
=
3195 debugfs_create_u8("tx_agg_tid_enable", S_IRUSR
| S_IWUSR
, dir
,
3196 &lq_sta
->tx_agg_tid_en
);
3197 lq_sta
->rs_sta_dbgfs_reduced_txp_file
=
3198 debugfs_create_u8("reduced_tpc", S_IRUSR
| S_IWUSR
, dir
,
3199 &lq_sta
->dbg_fixed_txp_reduction
);
3202 static void rs_remove_debugfs(void *mvm
, void *mvm_sta
)
3204 struct iwl_lq_sta
*lq_sta
= mvm_sta
;
3205 debugfs_remove(lq_sta
->rs_sta_dbgfs_scale_table_file
);
3206 debugfs_remove(lq_sta
->rs_sta_dbgfs_stats_table_file
);
3207 debugfs_remove(lq_sta
->rs_sta_dbgfs_drv_tx_stats_file
);
3208 debugfs_remove(lq_sta
->rs_sta_dbgfs_tx_agg_tid_en_file
);
3209 debugfs_remove(lq_sta
->rs_sta_dbgfs_reduced_txp_file
);
3214 * Initialization of rate scaling information is done by driver after
3215 * the station is added. Since mac80211 calls this function before a
3216 * station is added we ignore it.
3218 static void rs_rate_init_stub(void *mvm_r
,
3219 struct ieee80211_supported_band
*sband
,
3220 struct cfg80211_chan_def
*chandef
,
3221 struct ieee80211_sta
*sta
, void *mvm_sta
)
3225 static const struct rate_control_ops rs_mvm_ops
= {
3227 .tx_status
= rs_tx_status
,
3228 .get_rate
= rs_get_rate
,
3229 .rate_init
= rs_rate_init_stub
,
3232 .alloc_sta
= rs_alloc_sta
,
3233 .free_sta
= rs_free_sta
,
3234 .rate_update
= rs_rate_update
,
3235 #ifdef CONFIG_MAC80211_DEBUGFS
3236 .add_sta_debugfs
= rs_add_debugfs
,
3237 .remove_sta_debugfs
= rs_remove_debugfs
,
3241 int iwl_mvm_rate_control_register(void)
3243 return ieee80211_rate_control_register(&rs_mvm_ops
);
3246 void iwl_mvm_rate_control_unregister(void)
3248 ieee80211_rate_control_unregister(&rs_mvm_ops
);
3252 * iwl_mvm_tx_protection - Gets LQ command, change it to enable/disable
3253 * Tx protection, according to this rquest and previous requests,
3254 * and send the LQ command.
3255 * @mvmsta: The station
3256 * @enable: Enable Tx protection?
3258 int iwl_mvm_tx_protection(struct iwl_mvm
*mvm
, struct iwl_mvm_sta
*mvmsta
,
3261 struct iwl_lq_cmd
*lq
= &mvmsta
->lq_sta
.lq
;
3263 lockdep_assert_held(&mvm
->mutex
);
3266 if (mvmsta
->tx_protection
== 0)
3267 lq
->flags
|= LQ_FLAG_USE_RTS_MSK
;
3268 mvmsta
->tx_protection
++;
3270 mvmsta
->tx_protection
--;
3271 if (mvmsta
->tx_protection
== 0)
3272 lq
->flags
&= ~LQ_FLAG_USE_RTS_MSK
;
3275 return iwl_mvm_send_lq_cmd(mvm
, lq
, false);