1 /******************************************************************************
3 * Copyright(c) 2005 - 2014 Intel Corporation. All rights reserved.
4 * Copyright(c) 2013 - 2015 Intel Mobile Communications GmbH
5 * Copyright(c) 2016 Intel Deutschland GmbH
7 * This program is free software; you can redistribute it and/or modify it
8 * under the terms of version 2 of the GNU General Public License as
9 * published by the Free Software Foundation.
11 * This program is distributed in the hope that it will be useful, but WITHOUT
12 * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
13 * FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License for
16 * You should have received a copy of the GNU General Public License along with
17 * this program; if not, write to the Free Software Foundation, Inc.,
18 * 51 Franklin Street, Fifth Floor, Boston, MA 02110, USA
20 * The full GNU General Public License is included in this distribution in the
21 * file called LICENSE.
23 * Contact Information:
24 * Intel Linux Wireless <linuxwifi@intel.com>
25 * Intel Corporation, 5200 N.E. Elam Young Parkway, Hillsboro, OR 97124-6497
27 *****************************************************************************/
28 #include <linux/kernel.h>
29 #include <linux/skbuff.h>
30 #include <linux/slab.h>
31 #include <net/mac80211.h>
33 #include <linux/netdevice.h>
34 #include <linux/etherdevice.h>
35 #include <linux/delay.h>
37 #include <linux/workqueue.h>
41 #include "iwl-op-mode.h"
45 #define RS_NAME "iwl-mvm-rs"
47 #define IWL_RATE_MAX_WINDOW 62 /* # tx in history window */
49 /* Calculations of success ratio are done in fixed point where 12800 is 100%.
50 * Use this macro when dealing with thresholds consts set as a percentage
52 #define RS_PERCENT(x) (128 * x)
54 static u8 rs_ht_to_legacy
[] = {
55 [IWL_RATE_MCS_0_INDEX
] = IWL_RATE_6M_INDEX
,
56 [IWL_RATE_MCS_1_INDEX
] = IWL_RATE_9M_INDEX
,
57 [IWL_RATE_MCS_2_INDEX
] = IWL_RATE_12M_INDEX
,
58 [IWL_RATE_MCS_3_INDEX
] = IWL_RATE_18M_INDEX
,
59 [IWL_RATE_MCS_4_INDEX
] = IWL_RATE_24M_INDEX
,
60 [IWL_RATE_MCS_5_INDEX
] = IWL_RATE_36M_INDEX
,
61 [IWL_RATE_MCS_6_INDEX
] = IWL_RATE_48M_INDEX
,
62 [IWL_RATE_MCS_7_INDEX
] = IWL_RATE_54M_INDEX
,
63 [IWL_RATE_MCS_8_INDEX
] = IWL_RATE_54M_INDEX
,
64 [IWL_RATE_MCS_9_INDEX
] = IWL_RATE_54M_INDEX
,
67 static const u8 ant_toggle_lookup
[] = {
68 [ANT_NONE
] = ANT_NONE
,
78 #define IWL_DECLARE_RATE_INFO(r, s, rp, rn) \
79 [IWL_RATE_##r##M_INDEX] = { IWL_RATE_##r##M_PLCP, \
80 IWL_RATE_HT_SISO_MCS_##s##_PLCP, \
81 IWL_RATE_HT_MIMO2_MCS_##s##_PLCP, \
82 IWL_RATE_VHT_SISO_MCS_##s##_PLCP, \
83 IWL_RATE_VHT_MIMO2_MCS_##s##_PLCP,\
84 IWL_RATE_##rp##M_INDEX, \
85 IWL_RATE_##rn##M_INDEX }
87 #define IWL_DECLARE_MCS_RATE(s) \
88 [IWL_RATE_MCS_##s##_INDEX] = { IWL_RATE_INVM_PLCP, \
89 IWL_RATE_HT_SISO_MCS_##s##_PLCP, \
90 IWL_RATE_HT_MIMO2_MCS_##s##_PLCP, \
91 IWL_RATE_VHT_SISO_MCS_##s##_PLCP, \
92 IWL_RATE_VHT_MIMO2_MCS_##s##_PLCP, \
93 IWL_RATE_INVM_INDEX, \
98 * rate, ht rate, prev rate, next rate
100 * If there isn't a valid next or previous rate then INV is used which
101 * maps to IWL_RATE_INVALID
104 static const struct iwl_rs_rate_info iwl_rates
[IWL_RATE_COUNT
] = {
105 IWL_DECLARE_RATE_INFO(1, INV
, INV
, 2), /* 1mbps */
106 IWL_DECLARE_RATE_INFO(2, INV
, 1, 5), /* 2mbps */
107 IWL_DECLARE_RATE_INFO(5, INV
, 2, 11), /*5.5mbps */
108 IWL_DECLARE_RATE_INFO(11, INV
, 9, 12), /* 11mbps */
109 IWL_DECLARE_RATE_INFO(6, 0, 5, 11), /* 6mbps ; MCS 0 */
110 IWL_DECLARE_RATE_INFO(9, INV
, 6, 11), /* 9mbps */
111 IWL_DECLARE_RATE_INFO(12, 1, 11, 18), /* 12mbps ; MCS 1 */
112 IWL_DECLARE_RATE_INFO(18, 2, 12, 24), /* 18mbps ; MCS 2 */
113 IWL_DECLARE_RATE_INFO(24, 3, 18, 36), /* 24mbps ; MCS 3 */
114 IWL_DECLARE_RATE_INFO(36, 4, 24, 48), /* 36mbps ; MCS 4 */
115 IWL_DECLARE_RATE_INFO(48, 5, 36, 54), /* 48mbps ; MCS 5 */
116 IWL_DECLARE_RATE_INFO(54, 6, 48, INV
), /* 54mbps ; MCS 6 */
117 IWL_DECLARE_MCS_RATE(7), /* MCS 7 */
118 IWL_DECLARE_MCS_RATE(8), /* MCS 8 */
119 IWL_DECLARE_MCS_RATE(9), /* MCS 9 */
124 RS_ACTION_DOWNSCALE
= -1,
125 RS_ACTION_UPSCALE
= 1,
128 enum rs_column_mode
{
135 #define MAX_NEXT_COLUMNS 7
136 #define MAX_COLUMN_CHECKS 3
140 typedef bool (*allow_column_func_t
) (struct iwl_mvm
*mvm
,
141 struct ieee80211_sta
*sta
,
142 struct rs_rate
*rate
,
143 const struct rs_tx_column
*next_col
);
145 struct rs_tx_column
{
146 enum rs_column_mode mode
;
149 enum rs_column next_columns
[MAX_NEXT_COLUMNS
];
150 allow_column_func_t checks
[MAX_COLUMN_CHECKS
];
153 static bool rs_ant_allow(struct iwl_mvm
*mvm
, struct ieee80211_sta
*sta
,
154 struct rs_rate
*rate
,
155 const struct rs_tx_column
*next_col
)
157 return iwl_mvm_bt_coex_is_ant_avail(mvm
, next_col
->ant
);
160 static bool rs_mimo_allow(struct iwl_mvm
*mvm
, struct ieee80211_sta
*sta
,
161 struct rs_rate
*rate
,
162 const struct rs_tx_column
*next_col
)
164 struct iwl_mvm_sta
*mvmsta
;
165 struct iwl_mvm_vif
*mvmvif
;
167 if (!sta
->ht_cap
.ht_supported
)
170 if (sta
->smps_mode
== IEEE80211_SMPS_STATIC
)
173 if (num_of_ant(iwl_mvm_get_valid_tx_ant(mvm
)) < 2)
176 if (!iwl_mvm_bt_coex_is_mimo_allowed(mvm
, sta
))
179 mvmsta
= iwl_mvm_sta_from_mac80211(sta
);
180 mvmvif
= iwl_mvm_vif_from_mac80211(mvmsta
->vif
);
182 if (mvm
->nvm_data
->sku_cap_mimo_disabled
)
188 static bool rs_siso_allow(struct iwl_mvm
*mvm
, struct ieee80211_sta
*sta
,
189 struct rs_rate
*rate
,
190 const struct rs_tx_column
*next_col
)
192 if (!sta
->ht_cap
.ht_supported
)
198 static bool rs_sgi_allow(struct iwl_mvm
*mvm
, struct ieee80211_sta
*sta
,
199 struct rs_rate
*rate
,
200 const struct rs_tx_column
*next_col
)
202 struct ieee80211_sta_ht_cap
*ht_cap
= &sta
->ht_cap
;
203 struct ieee80211_sta_vht_cap
*vht_cap
= &sta
->vht_cap
;
205 if (is_ht20(rate
) && (ht_cap
->cap
&
206 IEEE80211_HT_CAP_SGI_20
))
208 if (is_ht40(rate
) && (ht_cap
->cap
&
209 IEEE80211_HT_CAP_SGI_40
))
211 if (is_ht80(rate
) && (vht_cap
->cap
&
212 IEEE80211_VHT_CAP_SHORT_GI_80
))
218 static const struct rs_tx_column rs_tx_columns
[] = {
219 [RS_COLUMN_LEGACY_ANT_A
] = {
223 RS_COLUMN_LEGACY_ANT_B
,
224 RS_COLUMN_SISO_ANT_A
,
235 [RS_COLUMN_LEGACY_ANT_B
] = {
239 RS_COLUMN_LEGACY_ANT_A
,
240 RS_COLUMN_SISO_ANT_B
,
251 [RS_COLUMN_SISO_ANT_A
] = {
255 RS_COLUMN_SISO_ANT_B
,
257 RS_COLUMN_SISO_ANT_A_SGI
,
258 RS_COLUMN_LEGACY_ANT_A
,
259 RS_COLUMN_LEGACY_ANT_B
,
268 [RS_COLUMN_SISO_ANT_B
] = {
272 RS_COLUMN_SISO_ANT_A
,
274 RS_COLUMN_SISO_ANT_B_SGI
,
275 RS_COLUMN_LEGACY_ANT_A
,
276 RS_COLUMN_LEGACY_ANT_B
,
285 [RS_COLUMN_SISO_ANT_A_SGI
] = {
290 RS_COLUMN_SISO_ANT_B_SGI
,
292 RS_COLUMN_SISO_ANT_A
,
293 RS_COLUMN_LEGACY_ANT_A
,
294 RS_COLUMN_LEGACY_ANT_B
,
304 [RS_COLUMN_SISO_ANT_B_SGI
] = {
309 RS_COLUMN_SISO_ANT_A_SGI
,
311 RS_COLUMN_SISO_ANT_B
,
312 RS_COLUMN_LEGACY_ANT_A
,
313 RS_COLUMN_LEGACY_ANT_B
,
323 [RS_COLUMN_MIMO2
] = {
327 RS_COLUMN_SISO_ANT_A
,
329 RS_COLUMN_LEGACY_ANT_A
,
330 RS_COLUMN_LEGACY_ANT_B
,
339 [RS_COLUMN_MIMO2_SGI
] = {
344 RS_COLUMN_SISO_ANT_A_SGI
,
346 RS_COLUMN_LEGACY_ANT_A
,
347 RS_COLUMN_LEGACY_ANT_B
,
359 static inline u8
rs_extract_rate(u32 rate_n_flags
)
361 /* also works for HT because bits 7:6 are zero there */
362 return (u8
)(rate_n_flags
& RATE_LEGACY_RATE_MSK
);
365 static int iwl_hwrate_to_plcp_idx(u32 rate_n_flags
)
369 if (rate_n_flags
& RATE_MCS_HT_MSK
) {
370 idx
= rate_n_flags
& RATE_HT_MCS_RATE_CODE_MSK
;
371 idx
+= IWL_RATE_MCS_0_INDEX
;
373 /* skip 9M not supported in HT*/
374 if (idx
>= IWL_RATE_9M_INDEX
)
376 if ((idx
>= IWL_FIRST_HT_RATE
) && (idx
<= IWL_LAST_HT_RATE
))
378 } else if (rate_n_flags
& RATE_MCS_VHT_MSK
) {
379 idx
= rate_n_flags
& RATE_VHT_MCS_RATE_CODE_MSK
;
380 idx
+= IWL_RATE_MCS_0_INDEX
;
382 /* skip 9M not supported in VHT*/
383 if (idx
>= IWL_RATE_9M_INDEX
)
385 if ((idx
>= IWL_FIRST_VHT_RATE
) && (idx
<= IWL_LAST_VHT_RATE
))
388 /* legacy rate format, search for match in table */
390 u8 legacy_rate
= rs_extract_rate(rate_n_flags
);
391 for (idx
= 0; idx
< ARRAY_SIZE(iwl_rates
); idx
++)
392 if (iwl_rates
[idx
].plcp
== legacy_rate
)
396 return IWL_RATE_INVALID
;
399 static void rs_rate_scale_perform(struct iwl_mvm
*mvm
,
400 struct ieee80211_sta
*sta
,
401 struct iwl_lq_sta
*lq_sta
,
403 static void rs_fill_lq_cmd(struct iwl_mvm
*mvm
,
404 struct ieee80211_sta
*sta
,
405 struct iwl_lq_sta
*lq_sta
,
406 const struct rs_rate
*initial_rate
);
407 static void rs_stay_in_table(struct iwl_lq_sta
*lq_sta
, bool force_search
);
410 * The following tables contain the expected throughput metrics for all rates
412 * 1, 2, 5.5, 11, 6, 9, 12, 18, 24, 36, 48, 54, 60 MBits
414 * where invalid entries are zeros.
416 * CCK rates are only valid in legacy table and will only be used in G
420 static const u16 expected_tpt_legacy
[IWL_RATE_COUNT
] = {
421 7, 13, 35, 58, 40, 57, 72, 98, 121, 154, 177, 186, 0, 0, 0
424 /* Expected TpT tables. 4 indexes:
425 * 0 - NGI, 1 - SGI, 2 - AGG+NGI, 3 - AGG+SGI
427 static const u16 expected_tpt_siso_20MHz
[4][IWL_RATE_COUNT
] = {
428 {0, 0, 0, 0, 42, 0, 76, 102, 124, 159, 183, 193, 202, 216, 0},
429 {0, 0, 0, 0, 46, 0, 82, 110, 132, 168, 192, 202, 210, 225, 0},
430 {0, 0, 0, 0, 49, 0, 97, 145, 192, 285, 375, 420, 464, 551, 0},
431 {0, 0, 0, 0, 54, 0, 108, 160, 213, 315, 415, 465, 513, 608, 0},
434 static const u16 expected_tpt_siso_40MHz
[4][IWL_RATE_COUNT
] = {
435 {0, 0, 0, 0, 77, 0, 127, 160, 184, 220, 242, 250, 257, 269, 275},
436 {0, 0, 0, 0, 83, 0, 135, 169, 193, 229, 250, 257, 264, 275, 280},
437 {0, 0, 0, 0, 101, 0, 199, 295, 389, 570, 744, 828, 911, 1070, 1173},
438 {0, 0, 0, 0, 112, 0, 220, 326, 429, 629, 819, 912, 1000, 1173, 1284},
441 static const u16 expected_tpt_siso_80MHz
[4][IWL_RATE_COUNT
] = {
442 {0, 0, 0, 0, 130, 0, 191, 223, 244, 273, 288, 294, 298, 305, 308},
443 {0, 0, 0, 0, 138, 0, 200, 231, 251, 279, 293, 298, 302, 308, 312},
444 {0, 0, 0, 0, 217, 0, 429, 634, 834, 1220, 1585, 1760, 1931, 2258, 2466},
445 {0, 0, 0, 0, 241, 0, 475, 701, 921, 1343, 1741, 1931, 2117, 2468, 2691},
448 static const u16 expected_tpt_mimo2_20MHz
[4][IWL_RATE_COUNT
] = {
449 {0, 0, 0, 0, 74, 0, 123, 155, 179, 213, 235, 243, 250, 261, 0},
450 {0, 0, 0, 0, 81, 0, 131, 164, 187, 221, 242, 250, 256, 267, 0},
451 {0, 0, 0, 0, 98, 0, 193, 286, 375, 550, 718, 799, 878, 1032, 0},
452 {0, 0, 0, 0, 109, 0, 214, 316, 414, 607, 790, 879, 965, 1132, 0},
455 static const u16 expected_tpt_mimo2_40MHz
[4][IWL_RATE_COUNT
] = {
456 {0, 0, 0, 0, 123, 0, 182, 214, 235, 264, 279, 285, 289, 296, 300},
457 {0, 0, 0, 0, 131, 0, 191, 222, 242, 270, 284, 289, 293, 300, 303},
458 {0, 0, 0, 0, 200, 0, 390, 571, 741, 1067, 1365, 1505, 1640, 1894, 2053},
459 {0, 0, 0, 0, 221, 0, 430, 630, 816, 1169, 1490, 1641, 1784, 2053, 2221},
462 static const u16 expected_tpt_mimo2_80MHz
[4][IWL_RATE_COUNT
] = {
463 {0, 0, 0, 0, 182, 0, 240, 264, 278, 299, 308, 311, 313, 317, 319},
464 {0, 0, 0, 0, 190, 0, 247, 269, 282, 302, 310, 313, 315, 319, 320},
465 {0, 0, 0, 0, 428, 0, 833, 1215, 1577, 2254, 2863, 3147, 3418, 3913, 4219},
466 {0, 0, 0, 0, 474, 0, 920, 1338, 1732, 2464, 3116, 3418, 3705, 4225, 4545},
470 static const struct iwl_rate_mcs_info iwl_rate_mcs
[IWL_RATE_COUNT
] = {
479 { "24", "16QAM 1/2"},
480 { "36", "16QAM 3/4"},
481 { "48", "64QAM 2/3"},
482 { "54", "64QAM 3/4"},
483 { "60", "64QAM 5/6"},
486 #define MCS_INDEX_PER_STREAM (8)
488 static const char *rs_pretty_ant(u8 ant
)
490 static const char * const ant_name
[] = {
504 return ant_name
[ant
];
507 static const char *rs_pretty_lq_type(enum iwl_table_type type
)
509 static const char * const lq_types
[] = {
511 [LQ_LEGACY_A
] = "LEGACY_A",
512 [LQ_LEGACY_G
] = "LEGACY_G",
513 [LQ_HT_SISO
] = "HT SISO",
514 [LQ_HT_MIMO2
] = "HT MIMO",
515 [LQ_VHT_SISO
] = "VHT SISO",
516 [LQ_VHT_MIMO2
] = "VHT MIMO",
519 if (type
< LQ_NONE
|| type
>= LQ_MAX
)
522 return lq_types
[type
];
525 static char *rs_pretty_rate(const struct rs_rate
*rate
)
528 static const char * const legacy_rates
[] = {
529 [IWL_RATE_1M_INDEX
] = "1M",
530 [IWL_RATE_2M_INDEX
] = "2M",
531 [IWL_RATE_5M_INDEX
] = "5.5M",
532 [IWL_RATE_11M_INDEX
] = "11M",
533 [IWL_RATE_6M_INDEX
] = "6M",
534 [IWL_RATE_9M_INDEX
] = "9M",
535 [IWL_RATE_12M_INDEX
] = "12M",
536 [IWL_RATE_18M_INDEX
] = "18M",
537 [IWL_RATE_24M_INDEX
] = "24M",
538 [IWL_RATE_36M_INDEX
] = "36M",
539 [IWL_RATE_48M_INDEX
] = "48M",
540 [IWL_RATE_54M_INDEX
] = "54M",
542 static const char *const ht_vht_rates
[] = {
543 [IWL_RATE_MCS_0_INDEX
] = "MCS0",
544 [IWL_RATE_MCS_1_INDEX
] = "MCS1",
545 [IWL_RATE_MCS_2_INDEX
] = "MCS2",
546 [IWL_RATE_MCS_3_INDEX
] = "MCS3",
547 [IWL_RATE_MCS_4_INDEX
] = "MCS4",
548 [IWL_RATE_MCS_5_INDEX
] = "MCS5",
549 [IWL_RATE_MCS_6_INDEX
] = "MCS6",
550 [IWL_RATE_MCS_7_INDEX
] = "MCS7",
551 [IWL_RATE_MCS_8_INDEX
] = "MCS8",
552 [IWL_RATE_MCS_9_INDEX
] = "MCS9",
554 const char *rate_str
;
556 if (is_type_legacy(rate
->type
) && (rate
->index
<= IWL_RATE_54M_INDEX
))
557 rate_str
= legacy_rates
[rate
->index
];
558 else if ((is_type_ht(rate
->type
) || is_type_vht(rate
->type
)) &&
559 (rate
->index
<= IWL_RATE_MCS_9_INDEX
))
560 rate_str
= ht_vht_rates
[rate
->index
];
562 rate_str
= "BAD_RATE";
564 sprintf(buf
, "(%s|%s|%s)", rs_pretty_lq_type(rate
->type
),
565 rs_pretty_ant(rate
->ant
), rate_str
);
569 static inline void rs_dump_rate(struct iwl_mvm
*mvm
, const struct rs_rate
*rate
,
573 "%s: %s BW: %d SGI: %d LDPC: %d STBC: %d\n",
574 prefix
, rs_pretty_rate(rate
), rate
->bw
,
575 rate
->sgi
, rate
->ldpc
, rate
->stbc
);
578 static void rs_rate_scale_clear_window(struct iwl_rate_scale_data
*window
)
581 window
->success_counter
= 0;
582 window
->success_ratio
= IWL_INVALID_VALUE
;
584 window
->average_tpt
= IWL_INVALID_VALUE
;
587 static void rs_rate_scale_clear_tbl_windows(struct iwl_mvm
*mvm
,
588 struct iwl_scale_tbl_info
*tbl
)
592 IWL_DEBUG_RATE(mvm
, "Clearing up window stats\n");
593 for (i
= 0; i
< IWL_RATE_COUNT
; i
++)
594 rs_rate_scale_clear_window(&tbl
->win
[i
]);
596 for (i
= 0; i
< ARRAY_SIZE(tbl
->tpc_win
); i
++)
597 rs_rate_scale_clear_window(&tbl
->tpc_win
[i
]);
600 static inline u8
rs_is_valid_ant(u8 valid_antenna
, u8 ant_type
)
602 return (ant_type
& valid_antenna
) == ant_type
;
605 static int rs_tl_turn_on_agg_for_tid(struct iwl_mvm
*mvm
,
606 struct iwl_lq_sta
*lq_data
, u8 tid
,
607 struct ieee80211_sta
*sta
)
611 IWL_DEBUG_HT(mvm
, "Starting Tx agg: STA: %pM tid: %d\n",
613 ret
= ieee80211_start_tx_ba_session(sta
, tid
, 5000);
614 if (ret
== -EAGAIN
) {
616 * driver and mac80211 is out of sync
617 * this might be cause by reloading firmware
618 * stop the tx ba session here
620 IWL_ERR(mvm
, "Fail start Tx agg on tid: %d\n",
622 ieee80211_stop_tx_ba_session(sta
, tid
);
627 static void rs_tl_turn_on_agg(struct iwl_mvm
*mvm
, u8 tid
,
628 struct iwl_lq_sta
*lq_data
,
629 struct ieee80211_sta
*sta
)
631 if (tid
< IWL_MAX_TID_COUNT
)
632 rs_tl_turn_on_agg_for_tid(mvm
, lq_data
, tid
, sta
);
634 IWL_ERR(mvm
, "tid exceeds max TID count: %d/%d\n",
635 tid
, IWL_MAX_TID_COUNT
);
638 static inline int get_num_of_ant_from_rate(u32 rate_n_flags
)
640 return !!(rate_n_flags
& RATE_MCS_ANT_A_MSK
) +
641 !!(rate_n_flags
& RATE_MCS_ANT_B_MSK
) +
642 !!(rate_n_flags
& RATE_MCS_ANT_C_MSK
);
646 * Static function to get the expected throughput from an iwl_scale_tbl_info
647 * that wraps a NULL pointer check
649 static s32
get_expected_tpt(struct iwl_scale_tbl_info
*tbl
, int rs_index
)
651 if (tbl
->expected_tpt
)
652 return tbl
->expected_tpt
[rs_index
];
657 * rs_collect_tx_data - Update the success/failure sliding window
659 * We keep a sliding window of the last 62 packets transmitted
660 * at this rate. window->data contains the bitmask of successful
663 static int _rs_collect_tx_data(struct iwl_mvm
*mvm
,
664 struct iwl_scale_tbl_info
*tbl
,
665 int scale_index
, int attempts
, int successes
,
666 struct iwl_rate_scale_data
*window
)
668 static const u64 mask
= (((u64
)1) << (IWL_RATE_MAX_WINDOW
- 1));
671 /* Get expected throughput */
672 tpt
= get_expected_tpt(tbl
, scale_index
);
675 * Keep track of only the latest 62 tx frame attempts in this rate's
676 * history window; anything older isn't really relevant any more.
677 * If we have filled up the sliding window, drop the oldest attempt;
678 * if the oldest attempt (highest bit in bitmap) shows "success",
679 * subtract "1" from the success counter (this is the main reason
680 * we keep these bitmaps!).
682 while (attempts
> 0) {
683 if (window
->counter
>= IWL_RATE_MAX_WINDOW
) {
684 /* remove earliest */
685 window
->counter
= IWL_RATE_MAX_WINDOW
- 1;
687 if (window
->data
& mask
) {
688 window
->data
&= ~mask
;
689 window
->success_counter
--;
693 /* Increment frames-attempted counter */
696 /* Shift bitmap by one frame to throw away oldest history */
699 /* Mark the most recent #successes attempts as successful */
701 window
->success_counter
++;
709 /* Calculate current success ratio, avoid divide-by-0! */
710 if (window
->counter
> 0)
711 window
->success_ratio
= 128 * (100 * window
->success_counter
)
714 window
->success_ratio
= IWL_INVALID_VALUE
;
716 fail_count
= window
->counter
- window
->success_counter
;
718 /* Calculate average throughput, if we have enough history. */
719 if ((fail_count
>= IWL_MVM_RS_RATE_MIN_FAILURE_TH
) ||
720 (window
->success_counter
>= IWL_MVM_RS_RATE_MIN_SUCCESS_TH
))
721 window
->average_tpt
= (window
->success_ratio
* tpt
+ 64) / 128;
723 window
->average_tpt
= IWL_INVALID_VALUE
;
728 static int rs_collect_tpc_data(struct iwl_mvm
*mvm
,
729 struct iwl_lq_sta
*lq_sta
,
730 struct iwl_scale_tbl_info
*tbl
,
731 int scale_index
, int attempts
, int successes
,
734 struct iwl_rate_scale_data
*window
= NULL
;
736 if (WARN_ON_ONCE(reduced_txp
> TPC_MAX_REDUCTION
))
739 window
= &tbl
->tpc_win
[reduced_txp
];
740 return _rs_collect_tx_data(mvm
, tbl
, scale_index
, attempts
, successes
,
744 static int rs_collect_tlc_data(struct iwl_mvm
*mvm
,
745 struct iwl_lq_sta
*lq_sta
,
746 struct iwl_scale_tbl_info
*tbl
,
747 int scale_index
, int attempts
, int successes
)
749 struct iwl_rate_scale_data
*window
= NULL
;
751 if (scale_index
< 0 || scale_index
>= IWL_RATE_COUNT
)
754 if (tbl
->column
!= RS_COLUMN_INVALID
) {
755 struct lq_sta_pers
*pers
= &lq_sta
->pers
;
757 pers
->tx_stats
[tbl
->column
][scale_index
].total
+= attempts
;
758 pers
->tx_stats
[tbl
->column
][scale_index
].success
+= successes
;
761 /* Select window for current tx bit rate */
762 window
= &(tbl
->win
[scale_index
]);
763 return _rs_collect_tx_data(mvm
, tbl
, scale_index
, attempts
, successes
,
767 /* Convert rs_rate object into ucode rate bitmask */
768 static u32
ucode_rate_from_rs_rate(struct iwl_mvm
*mvm
,
769 struct rs_rate
*rate
)
772 int index
= rate
->index
;
774 ucode_rate
|= ((rate
->ant
<< RATE_MCS_ANT_POS
) &
775 RATE_MCS_ANT_ABC_MSK
);
777 if (is_legacy(rate
)) {
778 ucode_rate
|= iwl_rates
[index
].plcp
;
779 if (index
>= IWL_FIRST_CCK_RATE
&& index
<= IWL_LAST_CCK_RATE
)
780 ucode_rate
|= RATE_MCS_CCK_MSK
;
785 if (index
< IWL_FIRST_HT_RATE
|| index
> IWL_LAST_HT_RATE
) {
786 IWL_ERR(mvm
, "Invalid HT rate index %d\n", index
);
787 index
= IWL_LAST_HT_RATE
;
789 ucode_rate
|= RATE_MCS_HT_MSK
;
791 if (is_ht_siso(rate
))
792 ucode_rate
|= iwl_rates
[index
].plcp_ht_siso
;
793 else if (is_ht_mimo2(rate
))
794 ucode_rate
|= iwl_rates
[index
].plcp_ht_mimo2
;
797 } else if (is_vht(rate
)) {
798 if (index
< IWL_FIRST_VHT_RATE
|| index
> IWL_LAST_VHT_RATE
) {
799 IWL_ERR(mvm
, "Invalid VHT rate index %d\n", index
);
800 index
= IWL_LAST_VHT_RATE
;
802 ucode_rate
|= RATE_MCS_VHT_MSK
;
803 if (is_vht_siso(rate
))
804 ucode_rate
|= iwl_rates
[index
].plcp_vht_siso
;
805 else if (is_vht_mimo2(rate
))
806 ucode_rate
|= iwl_rates
[index
].plcp_vht_mimo2
;
811 IWL_ERR(mvm
, "Invalid rate->type %d\n", rate
->type
);
814 if (is_siso(rate
) && rate
->stbc
) {
815 /* To enable STBC we need to set both a flag and ANT_AB */
816 ucode_rate
|= RATE_MCS_ANT_AB_MSK
;
817 ucode_rate
|= RATE_MCS_VHT_STBC_MSK
;
820 ucode_rate
|= rate
->bw
;
822 ucode_rate
|= RATE_MCS_SGI_MSK
;
824 ucode_rate
|= RATE_MCS_LDPC_MSK
;
829 /* Convert a ucode rate into an rs_rate object */
830 static int rs_rate_from_ucode_rate(const u32 ucode_rate
,
831 enum ieee80211_band band
,
832 struct rs_rate
*rate
)
834 u32 ant_msk
= ucode_rate
& RATE_MCS_ANT_ABC_MSK
;
835 u8 num_of_ant
= get_num_of_ant_from_rate(ucode_rate
);
838 memset(rate
, 0, sizeof(*rate
));
839 rate
->index
= iwl_hwrate_to_plcp_idx(ucode_rate
);
841 if (rate
->index
== IWL_RATE_INVALID
)
844 rate
->ant
= (ant_msk
>> RATE_MCS_ANT_POS
);
847 if (!(ucode_rate
& RATE_MCS_HT_MSK
) &&
848 !(ucode_rate
& RATE_MCS_VHT_MSK
)) {
849 if (num_of_ant
== 1) {
850 if (band
== IEEE80211_BAND_5GHZ
)
851 rate
->type
= LQ_LEGACY_A
;
853 rate
->type
= LQ_LEGACY_G
;
860 if (ucode_rate
& RATE_MCS_SGI_MSK
)
862 if (ucode_rate
& RATE_MCS_LDPC_MSK
)
864 if (ucode_rate
& RATE_MCS_VHT_STBC_MSK
)
866 if (ucode_rate
& RATE_MCS_BF_MSK
)
869 rate
->bw
= ucode_rate
& RATE_MCS_CHAN_WIDTH_MSK
;
871 if (ucode_rate
& RATE_MCS_HT_MSK
) {
872 nss
= ((ucode_rate
& RATE_HT_MCS_NSS_MSK
) >>
873 RATE_HT_MCS_NSS_POS
) + 1;
876 rate
->type
= LQ_HT_SISO
;
877 WARN_ONCE(!rate
->stbc
&& !rate
->bfer
&& num_of_ant
!= 1,
879 rate
->stbc
, rate
->bfer
);
880 } else if (nss
== 2) {
881 rate
->type
= LQ_HT_MIMO2
;
882 WARN_ON_ONCE(num_of_ant
!= 2);
886 } else if (ucode_rate
& RATE_MCS_VHT_MSK
) {
887 nss
= ((ucode_rate
& RATE_VHT_MCS_NSS_MSK
) >>
888 RATE_VHT_MCS_NSS_POS
) + 1;
891 rate
->type
= LQ_VHT_SISO
;
892 WARN_ONCE(!rate
->stbc
&& !rate
->bfer
&& num_of_ant
!= 1,
894 rate
->stbc
, rate
->bfer
);
895 } else if (nss
== 2) {
896 rate
->type
= LQ_VHT_MIMO2
;
897 WARN_ON_ONCE(num_of_ant
!= 2);
903 WARN_ON_ONCE(rate
->bw
== RATE_MCS_CHAN_WIDTH_160
);
904 WARN_ON_ONCE(rate
->bw
== RATE_MCS_CHAN_WIDTH_80
&&
910 /* switch to another antenna/antennas and return 1 */
911 /* if no other valid antenna found, return 0 */
912 static int rs_toggle_antenna(u32 valid_ant
, struct rs_rate
*rate
)
916 if (!rate
->ant
|| rate
->ant
> ANT_ABC
)
919 if (!rs_is_valid_ant(valid_ant
, rate
->ant
))
922 new_ant_type
= ant_toggle_lookup
[rate
->ant
];
924 while ((new_ant_type
!= rate
->ant
) &&
925 !rs_is_valid_ant(valid_ant
, new_ant_type
))
926 new_ant_type
= ant_toggle_lookup
[new_ant_type
];
928 if (new_ant_type
== rate
->ant
)
931 rate
->ant
= new_ant_type
;
936 static u16
rs_get_supported_rates(struct iwl_lq_sta
*lq_sta
,
937 struct rs_rate
*rate
)
940 return lq_sta
->active_legacy_rate
;
941 else if (is_siso(rate
))
942 return lq_sta
->active_siso_rate
;
943 else if (is_mimo2(rate
))
944 return lq_sta
->active_mimo2_rate
;
950 static u16
rs_get_adjacent_rate(struct iwl_mvm
*mvm
, u8 index
, u16 rate_mask
,
953 u8 high
= IWL_RATE_INVALID
;
954 u8 low
= IWL_RATE_INVALID
;
956 /* 802.11A or ht walks to the next literal adjacent rate in
958 if (is_type_a_band(rate_type
) || !is_type_legacy(rate_type
)) {
962 /* Find the previous rate that is in the rate mask */
964 for (mask
= (1 << i
); i
>= 0; i
--, mask
>>= 1) {
965 if (rate_mask
& mask
) {
971 /* Find the next rate that is in the rate mask */
973 for (mask
= (1 << i
); i
< IWL_RATE_COUNT
; i
++, mask
<<= 1) {
974 if (rate_mask
& mask
) {
980 return (high
<< 8) | low
;
984 while (low
!= IWL_RATE_INVALID
) {
985 low
= iwl_rates
[low
].prev_rs
;
986 if (low
== IWL_RATE_INVALID
)
988 if (rate_mask
& (1 << low
))
993 while (high
!= IWL_RATE_INVALID
) {
994 high
= iwl_rates
[high
].next_rs
;
995 if (high
== IWL_RATE_INVALID
)
997 if (rate_mask
& (1 << high
))
1001 return (high
<< 8) | low
;
1004 static inline bool rs_rate_supported(struct iwl_lq_sta
*lq_sta
,
1005 struct rs_rate
*rate
)
1007 return BIT(rate
->index
) & rs_get_supported_rates(lq_sta
, rate
);
1010 /* Get the next supported lower rate in the current column.
1011 * Return true if bottom rate in the current column was reached
1013 static bool rs_get_lower_rate_in_column(struct iwl_lq_sta
*lq_sta
,
1014 struct rs_rate
*rate
)
1019 struct iwl_mvm
*mvm
= lq_sta
->pers
.drv
;
1021 rate_mask
= rs_get_supported_rates(lq_sta
, rate
);
1022 high_low
= rs_get_adjacent_rate(mvm
, rate
->index
, rate_mask
,
1024 low
= high_low
& 0xff;
1026 /* Bottom rate of column reached */
1027 if (low
== IWL_RATE_INVALID
)
1034 /* Get the next rate to use following a column downgrade */
1035 static void rs_get_lower_rate_down_column(struct iwl_lq_sta
*lq_sta
,
1036 struct rs_rate
*rate
)
1038 struct iwl_mvm
*mvm
= lq_sta
->pers
.drv
;
1040 if (is_legacy(rate
)) {
1041 /* No column to downgrade from Legacy */
1043 } else if (is_siso(rate
)) {
1044 /* Downgrade to Legacy if we were in SISO */
1045 if (lq_sta
->band
== IEEE80211_BAND_5GHZ
)
1046 rate
->type
= LQ_LEGACY_A
;
1048 rate
->type
= LQ_LEGACY_G
;
1050 rate
->bw
= RATE_MCS_CHAN_WIDTH_20
;
1052 WARN_ON_ONCE(rate
->index
< IWL_RATE_MCS_0_INDEX
||
1053 rate
->index
> IWL_RATE_MCS_9_INDEX
);
1055 rate
->index
= rs_ht_to_legacy
[rate
->index
];
1058 /* Downgrade to SISO with same MCS if in MIMO */
1059 rate
->type
= is_vht_mimo2(rate
) ?
1060 LQ_VHT_SISO
: LQ_HT_SISO
;
1063 if (num_of_ant(rate
->ant
) > 1)
1064 rate
->ant
= first_antenna(iwl_mvm_get_valid_tx_ant(mvm
));
1066 /* Relevant in both switching to SISO or Legacy */
1069 if (!rs_rate_supported(lq_sta
, rate
))
1070 rs_get_lower_rate_in_column(lq_sta
, rate
);
1073 /* Check if both rates are identical
1074 * allow_ant_mismatch enables matching a SISO rate on ANT_A or ANT_B
1075 * with a rate indicating STBC/BFER and ANT_AB.
1077 static inline bool rs_rate_equal(struct rs_rate
*a
,
1079 bool allow_ant_mismatch
)
1082 bool ant_match
= (a
->ant
== b
->ant
) && (a
->stbc
== b
->stbc
) &&
1083 (a
->bfer
== b
->bfer
);
1085 if (allow_ant_mismatch
) {
1086 if (a
->stbc
|| a
->bfer
) {
1087 WARN_ONCE(a
->ant
!= ANT_AB
, "stbc %d bfer %d ant %d",
1088 a
->stbc
, a
->bfer
, a
->ant
);
1089 ant_match
|= (b
->ant
== ANT_A
|| b
->ant
== ANT_B
);
1090 } else if (b
->stbc
|| b
->bfer
) {
1091 WARN_ONCE(b
->ant
!= ANT_AB
, "stbc %d bfer %d ant %d",
1092 b
->stbc
, b
->bfer
, b
->ant
);
1093 ant_match
|= (a
->ant
== ANT_A
|| a
->ant
== ANT_B
);
1097 return (a
->type
== b
->type
) && (a
->bw
== b
->bw
) && (a
->sgi
== b
->sgi
) &&
1098 (a
->ldpc
== b
->ldpc
) && (a
->index
== b
->index
) && ant_match
;
1101 /* Check if both rates share the same column */
1102 static inline bool rs_rate_column_match(struct rs_rate
*a
,
1107 if (a
->stbc
|| a
->bfer
)
1108 ant_match
= (b
->ant
== ANT_A
|| b
->ant
== ANT_B
);
1110 ant_match
= (a
->ant
== b
->ant
);
1112 return (a
->type
== b
->type
) && (a
->bw
== b
->bw
) && (a
->sgi
== b
->sgi
)
1116 static inline enum rs_column
rs_get_column_from_rate(struct rs_rate
*rate
)
1118 if (is_legacy(rate
)) {
1119 if (rate
->ant
== ANT_A
)
1120 return RS_COLUMN_LEGACY_ANT_A
;
1122 if (rate
->ant
== ANT_B
)
1123 return RS_COLUMN_LEGACY_ANT_B
;
1128 if (is_siso(rate
)) {
1129 if (rate
->ant
== ANT_A
|| rate
->stbc
|| rate
->bfer
)
1130 return rate
->sgi
? RS_COLUMN_SISO_ANT_A_SGI
:
1131 RS_COLUMN_SISO_ANT_A
;
1133 if (rate
->ant
== ANT_B
)
1134 return rate
->sgi
? RS_COLUMN_SISO_ANT_B_SGI
:
1135 RS_COLUMN_SISO_ANT_B
;
1141 return rate
->sgi
? RS_COLUMN_MIMO2_SGI
: RS_COLUMN_MIMO2
;
1144 return RS_COLUMN_INVALID
;
1147 static u8
rs_get_tid(struct ieee80211_hdr
*hdr
)
1149 u8 tid
= IWL_MAX_TID_COUNT
;
1151 if (ieee80211_is_data_qos(hdr
->frame_control
)) {
1152 u8
*qc
= ieee80211_get_qos_ctl(hdr
);
1156 if (unlikely(tid
> IWL_MAX_TID_COUNT
))
1157 tid
= IWL_MAX_TID_COUNT
;
1162 void iwl_mvm_rs_tx_status(struct iwl_mvm
*mvm
, struct ieee80211_sta
*sta
,
1163 int tid
, struct ieee80211_tx_info
*info
)
1168 struct iwl_lq_cmd
*table
;
1170 struct rs_rate lq_rate
, tx_resp_rate
;
1171 struct iwl_scale_tbl_info
*curr_tbl
, *other_tbl
, *tmp_tbl
;
1172 u8 reduced_txp
= (uintptr_t)info
->status
.status_driver_data
[0];
1173 u32 tx_resp_hwrate
= (uintptr_t)info
->status
.status_driver_data
[1];
1174 struct iwl_mvm_sta
*mvmsta
= iwl_mvm_sta_from_mac80211(sta
);
1175 struct iwl_lq_sta
*lq_sta
= &mvmsta
->lq_sta
;
1176 bool allow_ant_mismatch
= fw_has_api(&mvm
->fw
->ucode_capa
,
1177 IWL_UCODE_TLV_API_LQ_SS_PARAMS
);
1179 /* Treat uninitialized rate scaling data same as non-existing. */
1181 IWL_DEBUG_RATE(mvm
, "Station rate scaling not created yet.\n");
1183 } else if (!lq_sta
->pers
.drv
) {
1184 IWL_DEBUG_RATE(mvm
, "Rate scaling not initialized yet.\n");
1188 /* This packet was aggregated but doesn't carry status info */
1189 if ((info
->flags
& IEEE80211_TX_CTL_AMPDU
) &&
1190 !(info
->flags
& IEEE80211_TX_STAT_AMPDU
))
1193 rs_rate_from_ucode_rate(tx_resp_hwrate
, info
->band
, &tx_resp_rate
);
1195 #ifdef CONFIG_MAC80211_DEBUGFS
1196 /* Disable last tx check if we are debugging with fixed rate but
1197 * update tx stats */
1198 if (lq_sta
->pers
.dbg_fixed_rate
) {
1199 int index
= tx_resp_rate
.index
;
1200 enum rs_column column
;
1201 int attempts
, success
;
1203 column
= rs_get_column_from_rate(&tx_resp_rate
);
1204 if (WARN_ONCE(column
== RS_COLUMN_INVALID
,
1205 "Can't map rate 0x%x to column",
1209 if (info
->flags
& IEEE80211_TX_STAT_AMPDU
) {
1210 attempts
= info
->status
.ampdu_len
;
1211 success
= info
->status
.ampdu_ack_len
;
1213 attempts
= info
->status
.rates
[0].count
;
1214 success
= !!(info
->flags
& IEEE80211_TX_STAT_ACK
);
1217 lq_sta
->pers
.tx_stats
[column
][index
].total
+= attempts
;
1218 lq_sta
->pers
.tx_stats
[column
][index
].success
+= success
;
1220 IWL_DEBUG_RATE(mvm
, "Fixed rate 0x%x success %d attempts %d\n",
1221 tx_resp_hwrate
, success
, attempts
);
1226 if (time_after(jiffies
,
1227 (unsigned long)(lq_sta
->last_tx
+
1228 (IWL_MVM_RS_IDLE_TIMEOUT
* HZ
)))) {
1231 IWL_DEBUG_RATE(mvm
, "Tx idle for too long. reinit rs\n");
1232 for (t
= 0; t
< IWL_MAX_TID_COUNT
; t
++)
1233 ieee80211_stop_tx_ba_session(sta
, t
);
1235 iwl_mvm_rs_rate_init(mvm
, sta
, info
->band
, false);
1238 lq_sta
->last_tx
= jiffies
;
1240 /* Ignore this Tx frame response if its initial rate doesn't match
1241 * that of latest Link Quality command. There may be stragglers
1242 * from a previous Link Quality command, but we're no longer interested
1243 * in those; they're either from the "active" mode while we're trying
1244 * to check "search" mode, or a prior "search" mode after we've moved
1245 * to a new "search" mode (which might become the new "active" mode).
1247 table
= &lq_sta
->lq
;
1248 lq_hwrate
= le32_to_cpu(table
->rs_table
[0]);
1249 rs_rate_from_ucode_rate(lq_hwrate
, info
->band
, &lq_rate
);
1251 /* Here we actually compare this rate to the latest LQ command */
1252 if (!rs_rate_equal(&tx_resp_rate
, &lq_rate
, allow_ant_mismatch
)) {
1254 "initial tx resp rate 0x%x does not match 0x%x\n",
1255 tx_resp_hwrate
, lq_hwrate
);
1258 * Since rates mis-match, the last LQ command may have failed.
1259 * After IWL_MISSED_RATE_MAX mis-matches, resync the uCode with
1262 lq_sta
->missed_rate_counter
++;
1263 if (lq_sta
->missed_rate_counter
> IWL_MVM_RS_MISSED_RATE_MAX
) {
1264 lq_sta
->missed_rate_counter
= 0;
1266 "Too many rates mismatch. Send sync LQ. rs_state %d\n",
1268 iwl_mvm_send_lq_cmd(mvm
, &lq_sta
->lq
, false);
1270 /* Regardless, ignore this status info for outdated rate */
1273 /* Rate did match, so reset the missed_rate_counter */
1274 lq_sta
->missed_rate_counter
= 0;
1276 if (!lq_sta
->search_better_tbl
) {
1277 curr_tbl
= &(lq_sta
->lq_info
[lq_sta
->active_tbl
]);
1278 other_tbl
= &(lq_sta
->lq_info
[1 - lq_sta
->active_tbl
]);
1280 curr_tbl
= &(lq_sta
->lq_info
[1 - lq_sta
->active_tbl
]);
1281 other_tbl
= &(lq_sta
->lq_info
[lq_sta
->active_tbl
]);
1284 if (WARN_ON_ONCE(!rs_rate_column_match(&lq_rate
, &curr_tbl
->rate
))) {
1286 "Neither active nor search matches tx rate\n");
1287 tmp_tbl
= &(lq_sta
->lq_info
[lq_sta
->active_tbl
]);
1288 rs_dump_rate(mvm
, &tmp_tbl
->rate
, "ACTIVE");
1289 tmp_tbl
= &(lq_sta
->lq_info
[1 - lq_sta
->active_tbl
]);
1290 rs_dump_rate(mvm
, &tmp_tbl
->rate
, "SEARCH");
1291 rs_dump_rate(mvm
, &lq_rate
, "ACTUAL");
1294 * no matching table found, let's by-pass the data collection
1295 * and continue to perform rate scale to find the rate table
1297 rs_stay_in_table(lq_sta
, true);
1302 * Updating the frame history depends on whether packets were
1305 * For aggregation, all packets were transmitted at the same rate, the
1306 * first index into rate scale table.
1308 if (info
->flags
& IEEE80211_TX_STAT_AMPDU
) {
1309 rs_collect_tpc_data(mvm
, lq_sta
, curr_tbl
, lq_rate
.index
,
1310 info
->status
.ampdu_len
,
1311 info
->status
.ampdu_ack_len
,
1314 /* ampdu_ack_len = 0 marks no BA was received. For TLC, treat
1315 * it as a single frame loss as we don't want the success ratio
1316 * to dip too quickly because a BA wasn't received.
1317 * For TPC, there's no need for this optimisation since we want
1318 * to recover very quickly from a bad power reduction and,
1319 * therefore we'd like the success ratio to get an immediate hit
1320 * when failing to get a BA, so we'd switch back to a lower or
1321 * zero power reduction. When FW transmits agg with a rate
1322 * different from the initial rate, it will not use reduced txp
1323 * and will send BA notification twice (one empty with reduced
1324 * txp equal to the value from LQ and one with reduced txp 0).
1325 * We need to update counters for each txp level accordingly.
1327 if (info
->status
.ampdu_ack_len
== 0)
1328 info
->status
.ampdu_len
= 1;
1330 rs_collect_tlc_data(mvm
, lq_sta
, curr_tbl
, lq_rate
.index
,
1331 info
->status
.ampdu_len
,
1332 info
->status
.ampdu_ack_len
);
1334 /* Update success/fail counts if not searching for new mode */
1335 if (lq_sta
->rs_state
== RS_STATE_STAY_IN_COLUMN
) {
1336 lq_sta
->total_success
+= info
->status
.ampdu_ack_len
;
1337 lq_sta
->total_failed
+= (info
->status
.ampdu_len
-
1338 info
->status
.ampdu_ack_len
);
1341 /* For legacy, update frame history with for each Tx retry. */
1342 retries
= info
->status
.rates
[0].count
- 1;
1343 /* HW doesn't send more than 15 retries */
1344 retries
= min(retries
, 15);
1346 /* The last transmission may have been successful */
1347 legacy_success
= !!(info
->flags
& IEEE80211_TX_STAT_ACK
);
1348 /* Collect data for each rate used during failed TX attempts */
1349 for (i
= 0; i
<= retries
; ++i
) {
1350 lq_hwrate
= le32_to_cpu(table
->rs_table
[i
]);
1351 rs_rate_from_ucode_rate(lq_hwrate
, info
->band
,
1354 * Only collect stats if retried rate is in the same RS
1355 * table as active/search.
1357 if (rs_rate_column_match(&lq_rate
, &curr_tbl
->rate
))
1359 else if (rs_rate_column_match(&lq_rate
,
1361 tmp_tbl
= other_tbl
;
1365 rs_collect_tpc_data(mvm
, lq_sta
, tmp_tbl
,
1367 i
< retries
? 0 : legacy_success
,
1369 rs_collect_tlc_data(mvm
, lq_sta
, tmp_tbl
,
1371 i
< retries
? 0 : legacy_success
);
1374 /* Update success/fail counts if not searching for new mode */
1375 if (lq_sta
->rs_state
== RS_STATE_STAY_IN_COLUMN
) {
1376 lq_sta
->total_success
+= legacy_success
;
1377 lq_sta
->total_failed
+= retries
+ (1 - legacy_success
);
1380 /* The last TX rate is cached in lq_sta; it's set in if/else above */
1381 lq_sta
->last_rate_n_flags
= lq_hwrate
;
1382 IWL_DEBUG_RATE(mvm
, "reduced txpower: %d\n", reduced_txp
);
1384 /* See if there's a better rate or modulation mode to try. */
1385 if (sta
->supp_rates
[info
->band
])
1386 rs_rate_scale_perform(mvm
, sta
, lq_sta
, tid
);
1390 * mac80211 sends us Tx status
1392 static void rs_mac80211_tx_status(void *mvm_r
,
1393 struct ieee80211_supported_band
*sband
,
1394 struct ieee80211_sta
*sta
, void *priv_sta
,
1395 struct sk_buff
*skb
)
1397 struct ieee80211_hdr
*hdr
= (struct ieee80211_hdr
*)skb
->data
;
1398 struct iwl_op_mode
*op_mode
= (struct iwl_op_mode
*)mvm_r
;
1399 struct iwl_mvm
*mvm
= IWL_OP_MODE_GET_MVM(op_mode
);
1400 struct ieee80211_tx_info
*info
= IEEE80211_SKB_CB(skb
);
1402 if (!iwl_mvm_sta_from_mac80211(sta
)->vif
)
1405 if (!ieee80211_is_data(hdr
->frame_control
) ||
1406 info
->flags
& IEEE80211_TX_CTL_NO_ACK
)
1409 iwl_mvm_rs_tx_status(mvm
, sta
, rs_get_tid(hdr
), info
);
1413 * Begin a period of staying with a selected modulation mode.
1414 * Set "stay_in_tbl" flag to prevent any mode switches.
1415 * Set frame tx success limits according to legacy vs. high-throughput,
1416 * and reset overall (spanning all rates) tx success history statistics.
1417 * These control how long we stay using same modulation mode before
1418 * searching for a new mode.
1420 static void rs_set_stay_in_table(struct iwl_mvm
*mvm
, u8 is_legacy
,
1421 struct iwl_lq_sta
*lq_sta
)
1423 IWL_DEBUG_RATE(mvm
, "Moving to RS_STATE_STAY_IN_COLUMN\n");
1424 lq_sta
->rs_state
= RS_STATE_STAY_IN_COLUMN
;
1426 lq_sta
->table_count_limit
= IWL_MVM_RS_LEGACY_TABLE_COUNT
;
1427 lq_sta
->max_failure_limit
= IWL_MVM_RS_LEGACY_FAILURE_LIMIT
;
1428 lq_sta
->max_success_limit
= IWL_MVM_RS_LEGACY_SUCCESS_LIMIT
;
1430 lq_sta
->table_count_limit
= IWL_MVM_RS_NON_LEGACY_TABLE_COUNT
;
1431 lq_sta
->max_failure_limit
= IWL_MVM_RS_NON_LEGACY_FAILURE_LIMIT
;
1432 lq_sta
->max_success_limit
= IWL_MVM_RS_NON_LEGACY_SUCCESS_LIMIT
;
1434 lq_sta
->table_count
= 0;
1435 lq_sta
->total_failed
= 0;
1436 lq_sta
->total_success
= 0;
1437 lq_sta
->flush_timer
= jiffies
;
1438 lq_sta
->visited_columns
= 0;
1441 static inline int rs_get_max_rate_from_mask(unsigned long rate_mask
)
1444 return find_last_bit(&rate_mask
, BITS_PER_LONG
);
1445 return IWL_RATE_INVALID
;
1448 static int rs_get_max_allowed_rate(struct iwl_lq_sta
*lq_sta
,
1449 const struct rs_tx_column
*column
)
1451 switch (column
->mode
) {
1453 return lq_sta
->max_legacy_rate_idx
;
1455 return lq_sta
->max_siso_rate_idx
;
1457 return lq_sta
->max_mimo2_rate_idx
;
1462 return lq_sta
->max_legacy_rate_idx
;
1465 static const u16
*rs_get_expected_tpt_table(struct iwl_lq_sta
*lq_sta
,
1466 const struct rs_tx_column
*column
,
1469 /* Used to choose among HT tables */
1470 const u16 (*ht_tbl_pointer
)[IWL_RATE_COUNT
];
1472 if (WARN_ON_ONCE(column
->mode
!= RS_LEGACY
&&
1473 column
->mode
!= RS_SISO
&&
1474 column
->mode
!= RS_MIMO2
))
1475 return expected_tpt_legacy
;
1477 /* Legacy rates have only one table */
1478 if (column
->mode
== RS_LEGACY
)
1479 return expected_tpt_legacy
;
1481 ht_tbl_pointer
= expected_tpt_mimo2_20MHz
;
1482 /* Choose among many HT tables depending on number of streams
1483 * (SISO/MIMO2), channel width (20/40/80), SGI, and aggregation
1485 if (column
->mode
== RS_SISO
) {
1487 case RATE_MCS_CHAN_WIDTH_20
:
1488 ht_tbl_pointer
= expected_tpt_siso_20MHz
;
1490 case RATE_MCS_CHAN_WIDTH_40
:
1491 ht_tbl_pointer
= expected_tpt_siso_40MHz
;
1493 case RATE_MCS_CHAN_WIDTH_80
:
1494 ht_tbl_pointer
= expected_tpt_siso_80MHz
;
1499 } else if (column
->mode
== RS_MIMO2
) {
1501 case RATE_MCS_CHAN_WIDTH_20
:
1502 ht_tbl_pointer
= expected_tpt_mimo2_20MHz
;
1504 case RATE_MCS_CHAN_WIDTH_40
:
1505 ht_tbl_pointer
= expected_tpt_mimo2_40MHz
;
1507 case RATE_MCS_CHAN_WIDTH_80
:
1508 ht_tbl_pointer
= expected_tpt_mimo2_80MHz
;
1517 if (!column
->sgi
&& !lq_sta
->is_agg
) /* Normal */
1518 return ht_tbl_pointer
[0];
1519 else if (column
->sgi
&& !lq_sta
->is_agg
) /* SGI */
1520 return ht_tbl_pointer
[1];
1521 else if (!column
->sgi
&& lq_sta
->is_agg
) /* AGG */
1522 return ht_tbl_pointer
[2];
1524 return ht_tbl_pointer
[3];
1527 static void rs_set_expected_tpt_table(struct iwl_lq_sta
*lq_sta
,
1528 struct iwl_scale_tbl_info
*tbl
)
1530 struct rs_rate
*rate
= &tbl
->rate
;
1531 const struct rs_tx_column
*column
= &rs_tx_columns
[tbl
->column
];
1533 tbl
->expected_tpt
= rs_get_expected_tpt_table(lq_sta
, column
, rate
->bw
);
1536 static s32
rs_get_best_rate(struct iwl_mvm
*mvm
,
1537 struct iwl_lq_sta
*lq_sta
,
1538 struct iwl_scale_tbl_info
*tbl
, /* "search" */
1539 unsigned long rate_mask
, s8 index
)
1541 struct iwl_scale_tbl_info
*active_tbl
=
1542 &(lq_sta
->lq_info
[lq_sta
->active_tbl
]);
1543 s32 success_ratio
= active_tbl
->win
[index
].success_ratio
;
1544 u16 expected_current_tpt
= active_tbl
->expected_tpt
[index
];
1545 const u16
*tpt_tbl
= tbl
->expected_tpt
;
1550 if (success_ratio
>= RS_PERCENT(IWL_MVM_RS_SR_NO_DECREASE
)) {
1551 target_tpt
= 100 * expected_current_tpt
;
1553 "SR %d high. Find rate exceeding EXPECTED_CURRENT %d\n",
1554 success_ratio
, target_tpt
);
1556 target_tpt
= lq_sta
->last_tpt
;
1558 "SR %d not that good. Find rate exceeding ACTUAL_TPT %d\n",
1559 success_ratio
, target_tpt
);
1562 rate_idx
= find_first_bit(&rate_mask
, BITS_PER_LONG
);
1564 while (rate_idx
!= IWL_RATE_INVALID
) {
1565 if (target_tpt
< (100 * tpt_tbl
[rate_idx
]))
1568 high_low
= rs_get_adjacent_rate(mvm
, rate_idx
, rate_mask
,
1571 rate_idx
= (high_low
>> 8) & 0xff;
1574 IWL_DEBUG_RATE(mvm
, "Best rate found %d target_tp %d expected_new %d\n",
1575 rate_idx
, target_tpt
,
1576 rate_idx
!= IWL_RATE_INVALID
?
1577 100 * tpt_tbl
[rate_idx
] : IWL_INVALID_VALUE
);
1582 static u32
rs_bw_from_sta_bw(struct ieee80211_sta
*sta
)
1584 if (sta
->bandwidth
>= IEEE80211_STA_RX_BW_80
)
1585 return RATE_MCS_CHAN_WIDTH_80
;
1586 else if (sta
->bandwidth
>= IEEE80211_STA_RX_BW_40
)
1587 return RATE_MCS_CHAN_WIDTH_40
;
1589 return RATE_MCS_CHAN_WIDTH_20
;
1593 * Check whether we should continue using same modulation mode, or
1594 * begin search for a new mode, based on:
1595 * 1) # tx successes or failures while using this mode
1596 * 2) # times calling this function
1597 * 3) elapsed time in this mode (not used, for now)
1599 static void rs_stay_in_table(struct iwl_lq_sta
*lq_sta
, bool force_search
)
1601 struct iwl_scale_tbl_info
*tbl
;
1603 int flush_interval_passed
= 0;
1604 struct iwl_mvm
*mvm
;
1606 mvm
= lq_sta
->pers
.drv
;
1607 active_tbl
= lq_sta
->active_tbl
;
1609 tbl
= &(lq_sta
->lq_info
[active_tbl
]);
1611 /* If we've been disallowing search, see if we should now allow it */
1612 if (lq_sta
->rs_state
== RS_STATE_STAY_IN_COLUMN
) {
1613 /* Elapsed time using current modulation mode */
1614 if (lq_sta
->flush_timer
)
1615 flush_interval_passed
=
1617 (unsigned long)(lq_sta
->flush_timer
+
1618 (IWL_MVM_RS_STAY_IN_COLUMN_TIMEOUT
* HZ
)));
1621 * Check if we should allow search for new modulation mode.
1622 * If many frames have failed or succeeded, or we've used
1623 * this same modulation for a long time, allow search, and
1624 * reset history stats that keep track of whether we should
1625 * allow a new search. Also (below) reset all bitmaps and
1626 * stats in active history.
1629 (lq_sta
->total_failed
> lq_sta
->max_failure_limit
) ||
1630 (lq_sta
->total_success
> lq_sta
->max_success_limit
) ||
1631 ((!lq_sta
->search_better_tbl
) &&
1632 (lq_sta
->flush_timer
) && (flush_interval_passed
))) {
1634 "LQ: stay is expired %d %d %d\n",
1635 lq_sta
->total_failed
,
1636 lq_sta
->total_success
,
1637 flush_interval_passed
);
1639 /* Allow search for new mode */
1640 lq_sta
->rs_state
= RS_STATE_SEARCH_CYCLE_STARTED
;
1642 "Moving to RS_STATE_SEARCH_CYCLE_STARTED\n");
1643 lq_sta
->total_failed
= 0;
1644 lq_sta
->total_success
= 0;
1645 lq_sta
->flush_timer
= 0;
1646 /* mark the current column as visited */
1647 lq_sta
->visited_columns
= BIT(tbl
->column
);
1649 * Else if we've used this modulation mode enough repetitions
1650 * (regardless of elapsed time or success/failure), reset
1651 * history bitmaps and rate-specific stats for all rates in
1655 lq_sta
->table_count
++;
1656 if (lq_sta
->table_count
>=
1657 lq_sta
->table_count_limit
) {
1658 lq_sta
->table_count
= 0;
1661 "LQ: stay in table clear win\n");
1662 rs_rate_scale_clear_tbl_windows(mvm
, tbl
);
1666 /* If transitioning to allow "search", reset all history
1667 * bitmaps and stats in active table (this will become the new
1668 * "search" table). */
1669 if (lq_sta
->rs_state
== RS_STATE_SEARCH_CYCLE_STARTED
) {
1670 rs_rate_scale_clear_tbl_windows(mvm
, tbl
);
1676 * setup rate table in uCode
1678 static void rs_update_rate_tbl(struct iwl_mvm
*mvm
,
1679 struct ieee80211_sta
*sta
,
1680 struct iwl_lq_sta
*lq_sta
,
1681 struct iwl_scale_tbl_info
*tbl
)
1683 rs_fill_lq_cmd(mvm
, sta
, lq_sta
, &tbl
->rate
);
1684 iwl_mvm_send_lq_cmd(mvm
, &lq_sta
->lq
, false);
1687 static bool rs_tweak_rate_tbl(struct iwl_mvm
*mvm
,
1688 struct ieee80211_sta
*sta
,
1689 struct iwl_lq_sta
*lq_sta
,
1690 struct iwl_scale_tbl_info
*tbl
,
1691 enum rs_action scale_action
)
1693 if (sta
->bandwidth
!= IEEE80211_STA_RX_BW_80
)
1696 if (!is_vht_siso(&tbl
->rate
))
1699 if ((tbl
->rate
.bw
== RATE_MCS_CHAN_WIDTH_80
) &&
1700 (tbl
->rate
.index
== IWL_RATE_MCS_0_INDEX
) &&
1701 (scale_action
== RS_ACTION_DOWNSCALE
)) {
1702 tbl
->rate
.bw
= RATE_MCS_CHAN_WIDTH_20
;
1703 tbl
->rate
.index
= IWL_RATE_MCS_4_INDEX
;
1704 IWL_DEBUG_RATE(mvm
, "Switch 80Mhz SISO MCS0 -> 20Mhz MCS4\n");
1708 /* Go back to 80Mhz MCS1 only if we've established that 20Mhz MCS5 is
1709 * sustainable, i.e. we're past the test window. We can't go back
1710 * if MCS5 is just tested as this will happen always after switching
1711 * to 20Mhz MCS4 because the rate stats are cleared.
1713 if ((tbl
->rate
.bw
== RATE_MCS_CHAN_WIDTH_20
) &&
1714 (((tbl
->rate
.index
== IWL_RATE_MCS_5_INDEX
) &&
1715 (scale_action
== RS_ACTION_STAY
)) ||
1716 ((tbl
->rate
.index
> IWL_RATE_MCS_5_INDEX
) &&
1717 (scale_action
== RS_ACTION_UPSCALE
)))) {
1718 tbl
->rate
.bw
= RATE_MCS_CHAN_WIDTH_80
;
1719 tbl
->rate
.index
= IWL_RATE_MCS_1_INDEX
;
1720 IWL_DEBUG_RATE(mvm
, "Switch 20Mhz SISO MCS5 -> 80Mhz MCS1\n");
1727 rs_set_expected_tpt_table(lq_sta
, tbl
);
1728 rs_rate_scale_clear_tbl_windows(mvm
, tbl
);
1732 static enum rs_column
rs_get_next_column(struct iwl_mvm
*mvm
,
1733 struct iwl_lq_sta
*lq_sta
,
1734 struct ieee80211_sta
*sta
,
1735 struct iwl_scale_tbl_info
*tbl
)
1738 enum rs_column next_col_id
;
1739 const struct rs_tx_column
*curr_col
= &rs_tx_columns
[tbl
->column
];
1740 const struct rs_tx_column
*next_col
;
1741 allow_column_func_t allow_func
;
1742 u8 valid_ants
= iwl_mvm_get_valid_tx_ant(mvm
);
1743 const u16
*expected_tpt_tbl
;
1744 u16 tpt
, max_expected_tpt
;
1746 for (i
= 0; i
< MAX_NEXT_COLUMNS
; i
++) {
1747 next_col_id
= curr_col
->next_columns
[i
];
1749 if (next_col_id
== RS_COLUMN_INVALID
)
1752 if (lq_sta
->visited_columns
& BIT(next_col_id
)) {
1753 IWL_DEBUG_RATE(mvm
, "Skip already visited column %d\n",
1758 next_col
= &rs_tx_columns
[next_col_id
];
1760 if (!rs_is_valid_ant(valid_ants
, next_col
->ant
)) {
1762 "Skip column %d as ANT config isn't supported by chip. valid_ants 0x%x column ant 0x%x\n",
1763 next_col_id
, valid_ants
, next_col
->ant
);
1767 for (j
= 0; j
< MAX_COLUMN_CHECKS
; j
++) {
1768 allow_func
= next_col
->checks
[j
];
1769 if (allow_func
&& !allow_func(mvm
, sta
, &tbl
->rate
,
1774 if (j
!= MAX_COLUMN_CHECKS
) {
1776 "Skip column %d: not allowed (check %d failed)\n",
1782 tpt
= lq_sta
->last_tpt
/ 100;
1783 expected_tpt_tbl
= rs_get_expected_tpt_table(lq_sta
, next_col
,
1784 rs_bw_from_sta_bw(sta
));
1785 if (WARN_ON_ONCE(!expected_tpt_tbl
))
1788 max_rate
= rs_get_max_allowed_rate(lq_sta
, next_col
);
1789 if (max_rate
== IWL_RATE_INVALID
) {
1791 "Skip column %d: no rate is allowed in this column\n",
1796 max_expected_tpt
= expected_tpt_tbl
[max_rate
];
1797 if (tpt
>= max_expected_tpt
) {
1799 "Skip column %d: can't beat current TPT. Max expected %d current %d\n",
1800 next_col_id
, max_expected_tpt
, tpt
);
1805 "Found potential column %d. Max expected %d current %d\n",
1806 next_col_id
, max_expected_tpt
, tpt
);
1810 if (i
== MAX_NEXT_COLUMNS
)
1811 return RS_COLUMN_INVALID
;
1816 static int rs_switch_to_column(struct iwl_mvm
*mvm
,
1817 struct iwl_lq_sta
*lq_sta
,
1818 struct ieee80211_sta
*sta
,
1819 enum rs_column col_id
)
1821 struct iwl_scale_tbl_info
*tbl
= &(lq_sta
->lq_info
[lq_sta
->active_tbl
]);
1822 struct iwl_scale_tbl_info
*search_tbl
=
1823 &(lq_sta
->lq_info
[(1 - lq_sta
->active_tbl
)]);
1824 struct rs_rate
*rate
= &search_tbl
->rate
;
1825 const struct rs_tx_column
*column
= &rs_tx_columns
[col_id
];
1826 const struct rs_tx_column
*curr_column
= &rs_tx_columns
[tbl
->column
];
1827 u32 sz
= (sizeof(struct iwl_scale_tbl_info
) -
1828 (sizeof(struct iwl_rate_scale_data
) * IWL_RATE_COUNT
));
1829 unsigned long rate_mask
= 0;
1832 memcpy(search_tbl
, tbl
, sz
);
1834 rate
->sgi
= column
->sgi
;
1835 rate
->ant
= column
->ant
;
1837 if (column
->mode
== RS_LEGACY
) {
1838 if (lq_sta
->band
== IEEE80211_BAND_5GHZ
)
1839 rate
->type
= LQ_LEGACY_A
;
1841 rate
->type
= LQ_LEGACY_G
;
1843 rate
->bw
= RATE_MCS_CHAN_WIDTH_20
;
1845 rate_mask
= lq_sta
->active_legacy_rate
;
1846 } else if (column
->mode
== RS_SISO
) {
1847 rate
->type
= lq_sta
->is_vht
? LQ_VHT_SISO
: LQ_HT_SISO
;
1848 rate_mask
= lq_sta
->active_siso_rate
;
1849 } else if (column
->mode
== RS_MIMO2
) {
1850 rate
->type
= lq_sta
->is_vht
? LQ_VHT_MIMO2
: LQ_HT_MIMO2
;
1851 rate_mask
= lq_sta
->active_mimo2_rate
;
1853 WARN_ONCE(1, "Bad column mode");
1856 if (column
->mode
!= RS_LEGACY
) {
1857 rate
->bw
= rs_bw_from_sta_bw(sta
);
1858 rate
->ldpc
= lq_sta
->ldpc
;
1861 search_tbl
->column
= col_id
;
1862 rs_set_expected_tpt_table(lq_sta
, search_tbl
);
1864 lq_sta
->visited_columns
|= BIT(col_id
);
1866 /* Get the best matching rate if we're changing modes. e.g.
1867 * SISO->MIMO, LEGACY->SISO, MIMO->SISO
1869 if (curr_column
->mode
!= column
->mode
) {
1870 rate_idx
= rs_get_best_rate(mvm
, lq_sta
, search_tbl
,
1871 rate_mask
, rate
->index
);
1873 if ((rate_idx
== IWL_RATE_INVALID
) ||
1874 !(BIT(rate_idx
) & rate_mask
)) {
1876 "can not switch with index %d"
1878 rate_idx
, rate_mask
);
1883 rate
->index
= rate_idx
;
1886 IWL_DEBUG_RATE(mvm
, "Switched to column %d: Index %d\n",
1887 col_id
, rate
->index
);
1892 rate
->type
= LQ_NONE
;
1896 static enum rs_action
rs_get_rate_action(struct iwl_mvm
*mvm
,
1897 struct iwl_scale_tbl_info
*tbl
,
1898 s32 sr
, int low
, int high
,
1900 int low_tpt
, int high_tpt
)
1902 enum rs_action action
= RS_ACTION_STAY
;
1904 if ((sr
<= RS_PERCENT(IWL_MVM_RS_SR_FORCE_DECREASE
)) ||
1905 (current_tpt
== 0)) {
1907 "Decrease rate because of low SR\n");
1908 return RS_ACTION_DOWNSCALE
;
1911 if ((low_tpt
== IWL_INVALID_VALUE
) &&
1912 (high_tpt
== IWL_INVALID_VALUE
) &&
1913 (high
!= IWL_RATE_INVALID
)) {
1915 "No data about high/low rates. Increase rate\n");
1916 return RS_ACTION_UPSCALE
;
1919 if ((high_tpt
== IWL_INVALID_VALUE
) &&
1920 (high
!= IWL_RATE_INVALID
) &&
1921 (low_tpt
!= IWL_INVALID_VALUE
) &&
1922 (low_tpt
< current_tpt
)) {
1924 "No data about high rate and low rate is worse. Increase rate\n");
1925 return RS_ACTION_UPSCALE
;
1928 if ((high_tpt
!= IWL_INVALID_VALUE
) &&
1929 (high_tpt
> current_tpt
)) {
1931 "Higher rate is better. Increate rate\n");
1932 return RS_ACTION_UPSCALE
;
1935 if ((low_tpt
!= IWL_INVALID_VALUE
) &&
1936 (high_tpt
!= IWL_INVALID_VALUE
) &&
1937 (low_tpt
< current_tpt
) &&
1938 (high_tpt
< current_tpt
)) {
1940 "Both high and low are worse. Maintain rate\n");
1941 return RS_ACTION_STAY
;
1944 if ((low_tpt
!= IWL_INVALID_VALUE
) &&
1945 (low_tpt
> current_tpt
)) {
1947 "Lower rate is better\n");
1948 action
= RS_ACTION_DOWNSCALE
;
1952 if ((low_tpt
== IWL_INVALID_VALUE
) &&
1953 (low
!= IWL_RATE_INVALID
)) {
1955 "No data about lower rate\n");
1956 action
= RS_ACTION_DOWNSCALE
;
1960 IWL_DEBUG_RATE(mvm
, "Maintain rate\n");
1963 if ((action
== RS_ACTION_DOWNSCALE
) && (low
!= IWL_RATE_INVALID
)) {
1964 if (sr
>= RS_PERCENT(IWL_MVM_RS_SR_NO_DECREASE
)) {
1966 "SR is above NO DECREASE. Avoid downscale\n");
1967 action
= RS_ACTION_STAY
;
1968 } else if (current_tpt
> (100 * tbl
->expected_tpt
[low
])) {
1970 "Current TPT is higher than max expected in low rate. Avoid downscale\n");
1971 action
= RS_ACTION_STAY
;
1973 IWL_DEBUG_RATE(mvm
, "Decrease rate\n");
1980 static bool rs_stbc_allow(struct iwl_mvm
*mvm
, struct ieee80211_sta
*sta
,
1981 struct iwl_lq_sta
*lq_sta
)
1983 /* Our chip supports Tx STBC and the peer is an HT/VHT STA which
1984 * supports STBC of at least 1*SS
1986 if (!lq_sta
->stbc_capable
)
1989 if (!iwl_mvm_bt_coex_is_mimo_allowed(mvm
, sta
))
1995 static void rs_get_adjacent_txp(struct iwl_mvm
*mvm
, int index
,
1996 int *weaker
, int *stronger
)
1998 *weaker
= index
+ IWL_MVM_RS_TPC_TX_POWER_STEP
;
1999 if (*weaker
> TPC_MAX_REDUCTION
)
2000 *weaker
= TPC_INVALID
;
2002 *stronger
= index
- IWL_MVM_RS_TPC_TX_POWER_STEP
;
2004 *stronger
= TPC_INVALID
;
2007 static bool rs_tpc_allowed(struct iwl_mvm
*mvm
, struct ieee80211_vif
*vif
,
2008 struct rs_rate
*rate
, enum ieee80211_band band
)
2010 int index
= rate
->index
;
2011 bool cam
= (iwlmvm_mod_params
.power_scheme
== IWL_POWER_SCHEME_CAM
);
2012 bool sta_ps_disabled
= (vif
->type
== NL80211_IFTYPE_STATION
&&
2015 IWL_DEBUG_RATE(mvm
, "cam: %d sta_ps_disabled %d\n",
2016 cam
, sta_ps_disabled
);
2018 * allow tpc only if power management is enabled, or bt coex
2019 * activity grade allows it and we are on 2.4Ghz.
2021 if ((cam
|| sta_ps_disabled
) &&
2022 !iwl_mvm_bt_coex_is_tpc_allowed(mvm
, band
))
2025 IWL_DEBUG_RATE(mvm
, "check rate, table type: %d\n", rate
->type
);
2026 if (is_legacy(rate
))
2027 return index
== IWL_RATE_54M_INDEX
;
2029 return index
== IWL_RATE_MCS_7_INDEX
;
2031 return index
== IWL_RATE_MCS_7_INDEX
||
2032 index
== IWL_RATE_MCS_8_INDEX
||
2033 index
== IWL_RATE_MCS_9_INDEX
;
2041 TPC_ACTION_DECREASE
,
2042 TPC_ACTION_INCREASE
,
2043 TPC_ACTION_NO_RESTIRCTION
,
2046 static enum tpc_action
rs_get_tpc_action(struct iwl_mvm
*mvm
,
2047 s32 sr
, int weak
, int strong
,
2049 int weak_tpt
, int strong_tpt
)
2051 /* stay until we have valid tpt */
2052 if (current_tpt
== IWL_INVALID_VALUE
) {
2053 IWL_DEBUG_RATE(mvm
, "no current tpt. stay.\n");
2054 return TPC_ACTION_STAY
;
2057 /* Too many failures, increase txp */
2058 if (sr
<= RS_PERCENT(IWL_MVM_RS_TPC_SR_FORCE_INCREASE
) ||
2060 IWL_DEBUG_RATE(mvm
, "increase txp because of weak SR\n");
2061 return TPC_ACTION_NO_RESTIRCTION
;
2064 /* try decreasing first if applicable */
2065 if (weak
!= TPC_INVALID
) {
2066 if (weak_tpt
== IWL_INVALID_VALUE
&&
2067 (strong_tpt
== IWL_INVALID_VALUE
||
2068 current_tpt
>= strong_tpt
)) {
2070 "no weak txp measurement. decrease txp\n");
2071 return TPC_ACTION_DECREASE
;
2074 if (weak_tpt
> current_tpt
) {
2076 "lower txp has better tpt. decrease txp\n");
2077 return TPC_ACTION_DECREASE
;
2081 /* next, increase if needed */
2082 if (sr
< RS_PERCENT(IWL_MVM_RS_TPC_SR_NO_INCREASE
) &&
2083 strong
!= TPC_INVALID
) {
2084 if (weak_tpt
== IWL_INVALID_VALUE
&&
2085 strong_tpt
!= IWL_INVALID_VALUE
&&
2086 current_tpt
< strong_tpt
) {
2088 "higher txp has better tpt. increase txp\n");
2089 return TPC_ACTION_INCREASE
;
2092 if (weak_tpt
< current_tpt
&&
2093 (strong_tpt
== IWL_INVALID_VALUE
||
2094 strong_tpt
> current_tpt
)) {
2096 "lower txp has worse tpt. increase txp\n");
2097 return TPC_ACTION_INCREASE
;
2101 IWL_DEBUG_RATE(mvm
, "no need to increase or decrease txp - stay\n");
2102 return TPC_ACTION_STAY
;
2105 static bool rs_tpc_perform(struct iwl_mvm
*mvm
,
2106 struct ieee80211_sta
*sta
,
2107 struct iwl_lq_sta
*lq_sta
,
2108 struct iwl_scale_tbl_info
*tbl
)
2110 struct iwl_mvm_sta
*mvm_sta
= iwl_mvm_sta_from_mac80211(sta
);
2111 struct ieee80211_vif
*vif
= mvm_sta
->vif
;
2112 struct ieee80211_chanctx_conf
*chanctx_conf
;
2113 enum ieee80211_band band
;
2114 struct iwl_rate_scale_data
*window
;
2115 struct rs_rate
*rate
= &tbl
->rate
;
2116 enum tpc_action action
;
2118 u8 cur
= lq_sta
->lq
.reduced_tpc
;
2121 int weak_tpt
= IWL_INVALID_VALUE
, strong_tpt
= IWL_INVALID_VALUE
;
2123 #ifdef CONFIG_MAC80211_DEBUGFS
2124 if (lq_sta
->pers
.dbg_fixed_txp_reduction
<= TPC_MAX_REDUCTION
) {
2125 IWL_DEBUG_RATE(mvm
, "fixed tpc: %d\n",
2126 lq_sta
->pers
.dbg_fixed_txp_reduction
);
2127 lq_sta
->lq
.reduced_tpc
= lq_sta
->pers
.dbg_fixed_txp_reduction
;
2128 return cur
!= lq_sta
->pers
.dbg_fixed_txp_reduction
;
2133 chanctx_conf
= rcu_dereference(vif
->chanctx_conf
);
2134 if (WARN_ON(!chanctx_conf
))
2135 band
= IEEE80211_NUM_BANDS
;
2137 band
= chanctx_conf
->def
.chan
->band
;
2140 if (!rs_tpc_allowed(mvm
, vif
, rate
, band
)) {
2142 "tpc is not allowed. remove txp restrictions\n");
2143 lq_sta
->lq
.reduced_tpc
= TPC_NO_REDUCTION
;
2144 return cur
!= TPC_NO_REDUCTION
;
2147 rs_get_adjacent_txp(mvm
, cur
, &weak
, &strong
);
2149 /* Collect measured throughputs for current and adjacent rates */
2150 window
= tbl
->tpc_win
;
2151 sr
= window
[cur
].success_ratio
;
2152 current_tpt
= window
[cur
].average_tpt
;
2153 if (weak
!= TPC_INVALID
)
2154 weak_tpt
= window
[weak
].average_tpt
;
2155 if (strong
!= TPC_INVALID
)
2156 strong_tpt
= window
[strong
].average_tpt
;
2159 "(TPC: %d): cur_tpt %d SR %d weak %d strong %d weak_tpt %d strong_tpt %d\n",
2160 cur
, current_tpt
, sr
, weak
, strong
,
2161 weak_tpt
, strong_tpt
);
2163 action
= rs_get_tpc_action(mvm
, sr
, weak
, strong
,
2164 current_tpt
, weak_tpt
, strong_tpt
);
2166 /* override actions if we are on the edge */
2167 if (weak
== TPC_INVALID
&& action
== TPC_ACTION_DECREASE
) {
2168 IWL_DEBUG_RATE(mvm
, "already in lowest txp, stay\n");
2169 action
= TPC_ACTION_STAY
;
2170 } else if (strong
== TPC_INVALID
&&
2171 (action
== TPC_ACTION_INCREASE
||
2172 action
== TPC_ACTION_NO_RESTIRCTION
)) {
2173 IWL_DEBUG_RATE(mvm
, "already in highest txp, stay\n");
2174 action
= TPC_ACTION_STAY
;
2178 case TPC_ACTION_DECREASE
:
2179 lq_sta
->lq
.reduced_tpc
= weak
;
2181 case TPC_ACTION_INCREASE
:
2182 lq_sta
->lq
.reduced_tpc
= strong
;
2184 case TPC_ACTION_NO_RESTIRCTION
:
2185 lq_sta
->lq
.reduced_tpc
= TPC_NO_REDUCTION
;
2187 case TPC_ACTION_STAY
:
2195 * Do rate scaling and search for new modulation mode.
2197 static void rs_rate_scale_perform(struct iwl_mvm
*mvm
,
2198 struct ieee80211_sta
*sta
,
2199 struct iwl_lq_sta
*lq_sta
,
2202 int low
= IWL_RATE_INVALID
;
2203 int high
= IWL_RATE_INVALID
;
2205 struct iwl_rate_scale_data
*window
= NULL
;
2206 int current_tpt
= IWL_INVALID_VALUE
;
2207 int low_tpt
= IWL_INVALID_VALUE
;
2208 int high_tpt
= IWL_INVALID_VALUE
;
2210 enum rs_action scale_action
= RS_ACTION_STAY
;
2213 struct iwl_scale_tbl_info
*tbl
, *tbl1
;
2218 u8 prev_agg
= lq_sta
->is_agg
;
2219 struct iwl_mvm_sta
*sta_priv
= iwl_mvm_sta_from_mac80211(sta
);
2220 struct iwl_mvm_tid_data
*tid_data
;
2221 struct rs_rate
*rate
;
2223 lq_sta
->is_agg
= !!sta_priv
->agg_tids
;
2226 * Select rate-scale / modulation-mode table to work with in
2227 * the rest of this function: "search" if searching for better
2228 * modulation mode, or "active" if doing rate scaling within a mode.
2230 if (!lq_sta
->search_better_tbl
)
2231 active_tbl
= lq_sta
->active_tbl
;
2233 active_tbl
= 1 - lq_sta
->active_tbl
;
2235 tbl
= &(lq_sta
->lq_info
[active_tbl
]);
2238 if (prev_agg
!= lq_sta
->is_agg
) {
2240 "Aggregation changed: prev %d current %d. Update expected TPT table\n",
2241 prev_agg
, lq_sta
->is_agg
);
2242 rs_set_expected_tpt_table(lq_sta
, tbl
);
2243 rs_rate_scale_clear_tbl_windows(mvm
, tbl
);
2246 /* current tx rate */
2247 index
= rate
->index
;
2249 /* rates available for this association, and for modulation mode */
2250 rate_mask
= rs_get_supported_rates(lq_sta
, rate
);
2252 if (!(BIT(index
) & rate_mask
)) {
2253 IWL_ERR(mvm
, "Current Rate is not valid\n");
2254 if (lq_sta
->search_better_tbl
) {
2255 /* revert to active table if search table is not valid*/
2256 rate
->type
= LQ_NONE
;
2257 lq_sta
->search_better_tbl
= 0;
2258 tbl
= &(lq_sta
->lq_info
[lq_sta
->active_tbl
]);
2259 rs_update_rate_tbl(mvm
, sta
, lq_sta
, tbl
);
2264 /* Get expected throughput table and history window for current rate */
2265 if (!tbl
->expected_tpt
) {
2266 IWL_ERR(mvm
, "tbl->expected_tpt is NULL\n");
2270 /* TODO: handle rate_idx_mask and rate_idx_mcs_mask */
2271 window
= &(tbl
->win
[index
]);
2274 * If there is not enough history to calculate actual average
2275 * throughput, keep analyzing results of more tx frames, without
2276 * changing rate or mode (bypass most of the rest of this function).
2277 * Set up new rate table in uCode only if old rate is not supported
2278 * in current association (use new rate found above).
2280 fail_count
= window
->counter
- window
->success_counter
;
2281 if ((fail_count
< IWL_MVM_RS_RATE_MIN_FAILURE_TH
) &&
2282 (window
->success_counter
< IWL_MVM_RS_RATE_MIN_SUCCESS_TH
)) {
2284 "%s: Test Window: succ %d total %d\n",
2285 rs_pretty_rate(rate
),
2286 window
->success_counter
, window
->counter
);
2288 /* Can't calculate this yet; not enough history */
2289 window
->average_tpt
= IWL_INVALID_VALUE
;
2291 /* Should we stay with this modulation mode,
2292 * or search for a new one? */
2293 rs_stay_in_table(lq_sta
, false);
2298 /* If we are searching for better modulation mode, check success. */
2299 if (lq_sta
->search_better_tbl
) {
2300 /* If good success, continue using the "search" mode;
2301 * no need to send new link quality command, since we're
2302 * continuing to use the setup that we've been trying. */
2303 if (window
->average_tpt
> lq_sta
->last_tpt
) {
2305 "SWITCHING TO NEW TABLE SR: %d "
2306 "cur-tpt %d old-tpt %d\n",
2307 window
->success_ratio
,
2308 window
->average_tpt
,
2311 /* Swap tables; "search" becomes "active" */
2312 lq_sta
->active_tbl
= active_tbl
;
2313 current_tpt
= window
->average_tpt
;
2314 /* Else poor success; go back to mode in "active" table */
2317 "GOING BACK TO THE OLD TABLE: SR %d "
2318 "cur-tpt %d old-tpt %d\n",
2319 window
->success_ratio
,
2320 window
->average_tpt
,
2323 /* Nullify "search" table */
2324 rate
->type
= LQ_NONE
;
2326 /* Revert to "active" table */
2327 active_tbl
= lq_sta
->active_tbl
;
2328 tbl
= &(lq_sta
->lq_info
[active_tbl
]);
2330 /* Revert to "active" rate and throughput info */
2331 index
= tbl
->rate
.index
;
2332 current_tpt
= lq_sta
->last_tpt
;
2334 /* Need to set up a new rate table in uCode */
2338 /* Either way, we've made a decision; modulation mode
2339 * search is done, allow rate adjustment next time. */
2340 lq_sta
->search_better_tbl
= 0;
2341 done_search
= 1; /* Don't switch modes below! */
2345 /* (Else) not in search of better modulation mode, try for better
2346 * starting rate, while staying in this mode. */
2347 high_low
= rs_get_adjacent_rate(mvm
, index
, rate_mask
, rate
->type
);
2348 low
= high_low
& 0xff;
2349 high
= (high_low
>> 8) & 0xff;
2351 /* TODO: handle rate_idx_mask and rate_idx_mcs_mask */
2353 sr
= window
->success_ratio
;
2355 /* Collect measured throughputs for current and adjacent rates */
2356 current_tpt
= window
->average_tpt
;
2357 if (low
!= IWL_RATE_INVALID
)
2358 low_tpt
= tbl
->win
[low
].average_tpt
;
2359 if (high
!= IWL_RATE_INVALID
)
2360 high_tpt
= tbl
->win
[high
].average_tpt
;
2363 "%s: cur_tpt %d SR %d low %d high %d low_tpt %d high_tpt %d\n",
2364 rs_pretty_rate(rate
), current_tpt
, sr
,
2365 low
, high
, low_tpt
, high_tpt
);
2367 scale_action
= rs_get_rate_action(mvm
, tbl
, sr
, low
, high
,
2368 current_tpt
, low_tpt
, high_tpt
);
2370 /* Force a search in case BT doesn't like us being in MIMO */
2371 if (is_mimo(rate
) &&
2372 !iwl_mvm_bt_coex_is_mimo_allowed(mvm
, sta
)) {
2374 "BT Coex forbids MIMO. Search for new config\n");
2375 rs_stay_in_table(lq_sta
, true);
2379 switch (scale_action
) {
2380 case RS_ACTION_DOWNSCALE
:
2381 /* Decrease starting rate, update uCode's rate table */
2382 if (low
!= IWL_RATE_INVALID
) {
2387 "At the bottom rate. Can't decrease\n");
2391 case RS_ACTION_UPSCALE
:
2392 /* Increase starting rate, update uCode's rate table */
2393 if (high
!= IWL_RATE_INVALID
) {
2398 "At the top rate. Can't increase\n");
2402 case RS_ACTION_STAY
:
2404 if (lq_sta
->rs_state
== RS_STATE_STAY_IN_COLUMN
)
2405 update_lq
= rs_tpc_perform(mvm
, sta
, lq_sta
, tbl
);
2412 /* Replace uCode's rate table for the destination station. */
2414 tbl
->rate
.index
= index
;
2415 if (IWL_MVM_RS_80_20_FAR_RANGE_TWEAK
)
2416 rs_tweak_rate_tbl(mvm
, sta
, lq_sta
, tbl
, scale_action
);
2417 rs_update_rate_tbl(mvm
, sta
, lq_sta
, tbl
);
2420 rs_stay_in_table(lq_sta
, false);
2423 * Search for new modulation mode if we're:
2424 * 1) Not changing rates right now
2425 * 2) Not just finishing up a search
2426 * 3) Allowing a new search
2428 if (!update_lq
&& !done_search
&&
2429 lq_sta
->rs_state
== RS_STATE_SEARCH_CYCLE_STARTED
2430 && window
->counter
) {
2431 enum rs_column next_column
;
2433 /* Save current throughput to compare with "search" throughput*/
2434 lq_sta
->last_tpt
= current_tpt
;
2437 "Start Search: update_lq %d done_search %d rs_state %d win->counter %d\n",
2438 update_lq
, done_search
, lq_sta
->rs_state
,
2441 next_column
= rs_get_next_column(mvm
, lq_sta
, sta
, tbl
);
2442 if (next_column
!= RS_COLUMN_INVALID
) {
2443 int ret
= rs_switch_to_column(mvm
, lq_sta
, sta
,
2446 lq_sta
->search_better_tbl
= 1;
2449 "No more columns to explore in search cycle. Go to RS_STATE_SEARCH_CYCLE_ENDED\n");
2450 lq_sta
->rs_state
= RS_STATE_SEARCH_CYCLE_ENDED
;
2453 /* If new "search" mode was selected, set up in uCode table */
2454 if (lq_sta
->search_better_tbl
) {
2455 /* Access the "search" table, clear its history. */
2456 tbl
= &(lq_sta
->lq_info
[(1 - lq_sta
->active_tbl
)]);
2457 rs_rate_scale_clear_tbl_windows(mvm
, tbl
);
2459 /* Use new "search" start rate */
2460 index
= tbl
->rate
.index
;
2462 rs_dump_rate(mvm
, &tbl
->rate
,
2463 "Switch to SEARCH TABLE:");
2464 rs_update_rate_tbl(mvm
, sta
, lq_sta
, tbl
);
2470 if (done_search
&& lq_sta
->rs_state
== RS_STATE_SEARCH_CYCLE_ENDED
) {
2471 /* If the "active" (non-search) mode was legacy,
2472 * and we've tried switching antennas,
2473 * but we haven't been able to try HT modes (not available),
2474 * stay with best antenna legacy modulation for a while
2475 * before next round of mode comparisons. */
2476 tbl1
= &(lq_sta
->lq_info
[lq_sta
->active_tbl
]);
2477 if (is_legacy(&tbl1
->rate
)) {
2478 IWL_DEBUG_RATE(mvm
, "LQ: STAY in legacy table\n");
2480 if (tid
!= IWL_MAX_TID_COUNT
) {
2481 tid_data
= &sta_priv
->tid_data
[tid
];
2482 if (tid_data
->state
!= IWL_AGG_OFF
) {
2484 "Stop aggregation on tid %d\n",
2486 ieee80211_stop_tx_ba_session(sta
, tid
);
2489 rs_set_stay_in_table(mvm
, 1, lq_sta
);
2491 /* If we're in an HT mode, and all 3 mode switch actions
2492 * have been tried and compared, stay in this best modulation
2493 * mode for a while before next round of mode comparisons. */
2494 if ((lq_sta
->last_tpt
> IWL_AGG_TPT_THREHOLD
) &&
2495 (lq_sta
->tx_agg_tid_en
& (1 << tid
)) &&
2496 (tid
!= IWL_MAX_TID_COUNT
)) {
2497 tid_data
= &sta_priv
->tid_data
[tid
];
2498 if (tid_data
->state
== IWL_AGG_OFF
) {
2500 "try to aggregate tid %d\n",
2502 rs_tl_turn_on_agg(mvm
, tid
,
2506 rs_set_stay_in_table(mvm
, 0, lq_sta
);
2511 struct rs_init_rate_info
{
2516 static const struct rs_init_rate_info rs_optimal_rates_24ghz_legacy
[] = {
2517 { -60, IWL_RATE_54M_INDEX
},
2518 { -64, IWL_RATE_48M_INDEX
},
2519 { -68, IWL_RATE_36M_INDEX
},
2520 { -80, IWL_RATE_24M_INDEX
},
2521 { -84, IWL_RATE_18M_INDEX
},
2522 { -85, IWL_RATE_12M_INDEX
},
2523 { -86, IWL_RATE_11M_INDEX
},
2524 { -88, IWL_RATE_5M_INDEX
},
2525 { -90, IWL_RATE_2M_INDEX
},
2526 { S8_MIN
, IWL_RATE_1M_INDEX
},
2529 static const struct rs_init_rate_info rs_optimal_rates_5ghz_legacy
[] = {
2530 { -60, IWL_RATE_54M_INDEX
},
2531 { -64, IWL_RATE_48M_INDEX
},
2532 { -72, IWL_RATE_36M_INDEX
},
2533 { -80, IWL_RATE_24M_INDEX
},
2534 { -84, IWL_RATE_18M_INDEX
},
2535 { -85, IWL_RATE_12M_INDEX
},
2536 { -87, IWL_RATE_9M_INDEX
},
2537 { S8_MIN
, IWL_RATE_6M_INDEX
},
2540 static const struct rs_init_rate_info rs_optimal_rates_ht
[] = {
2541 { -60, IWL_RATE_MCS_7_INDEX
},
2542 { -64, IWL_RATE_MCS_6_INDEX
},
2543 { -68, IWL_RATE_MCS_5_INDEX
},
2544 { -72, IWL_RATE_MCS_4_INDEX
},
2545 { -80, IWL_RATE_MCS_3_INDEX
},
2546 { -84, IWL_RATE_MCS_2_INDEX
},
2547 { -85, IWL_RATE_MCS_1_INDEX
},
2548 { S8_MIN
, IWL_RATE_MCS_0_INDEX
},
2551 static const struct rs_init_rate_info rs_optimal_rates_vht_20mhz
[] = {
2552 { -60, IWL_RATE_MCS_8_INDEX
},
2553 { -64, IWL_RATE_MCS_7_INDEX
},
2554 { -68, IWL_RATE_MCS_6_INDEX
},
2555 { -72, IWL_RATE_MCS_5_INDEX
},
2556 { -80, IWL_RATE_MCS_4_INDEX
},
2557 { -84, IWL_RATE_MCS_3_INDEX
},
2558 { -85, IWL_RATE_MCS_2_INDEX
},
2559 { -87, IWL_RATE_MCS_1_INDEX
},
2560 { S8_MIN
, IWL_RATE_MCS_0_INDEX
},
2563 static const struct rs_init_rate_info rs_optimal_rates_vht_40_80mhz
[] = {
2564 { -60, IWL_RATE_MCS_9_INDEX
},
2565 { -64, IWL_RATE_MCS_8_INDEX
},
2566 { -68, IWL_RATE_MCS_7_INDEX
},
2567 { -72, IWL_RATE_MCS_6_INDEX
},
2568 { -80, IWL_RATE_MCS_5_INDEX
},
2569 { -84, IWL_RATE_MCS_4_INDEX
},
2570 { -85, IWL_RATE_MCS_3_INDEX
},
2571 { -87, IWL_RATE_MCS_2_INDEX
},
2572 { -88, IWL_RATE_MCS_1_INDEX
},
2573 { S8_MIN
, IWL_RATE_MCS_0_INDEX
},
2576 #define IWL_RS_LOW_RSSI_THRESHOLD (-76) /* dBm */
2578 /* Init the optimal rate based on STA caps
2579 * This combined with rssi is used to report the last tx rate
2580 * to userspace when we haven't transmitted enough frames.
2582 static void rs_init_optimal_rate(struct iwl_mvm
*mvm
,
2583 struct ieee80211_sta
*sta
,
2584 struct iwl_lq_sta
*lq_sta
)
2586 struct rs_rate
*rate
= &lq_sta
->optimal_rate
;
2588 if (lq_sta
->max_mimo2_rate_idx
!= IWL_RATE_INVALID
)
2589 rate
->type
= lq_sta
->is_vht
? LQ_VHT_MIMO2
: LQ_HT_MIMO2
;
2590 else if (lq_sta
->max_siso_rate_idx
!= IWL_RATE_INVALID
)
2591 rate
->type
= lq_sta
->is_vht
? LQ_VHT_SISO
: LQ_HT_SISO
;
2592 else if (lq_sta
->band
== IEEE80211_BAND_5GHZ
)
2593 rate
->type
= LQ_LEGACY_A
;
2595 rate
->type
= LQ_LEGACY_G
;
2597 rate
->bw
= rs_bw_from_sta_bw(sta
);
2598 rate
->sgi
= rs_sgi_allow(mvm
, sta
, rate
, NULL
);
2600 /* ANT/LDPC/STBC aren't relevant for the rate reported to userspace */
2602 if (is_mimo(rate
)) {
2603 lq_sta
->optimal_rate_mask
= lq_sta
->active_mimo2_rate
;
2604 } else if (is_siso(rate
)) {
2605 lq_sta
->optimal_rate_mask
= lq_sta
->active_siso_rate
;
2607 lq_sta
->optimal_rate_mask
= lq_sta
->active_legacy_rate
;
2609 if (lq_sta
->band
== IEEE80211_BAND_5GHZ
) {
2610 lq_sta
->optimal_rates
= rs_optimal_rates_5ghz_legacy
;
2611 lq_sta
->optimal_nentries
=
2612 ARRAY_SIZE(rs_optimal_rates_5ghz_legacy
);
2614 lq_sta
->optimal_rates
= rs_optimal_rates_24ghz_legacy
;
2615 lq_sta
->optimal_nentries
=
2616 ARRAY_SIZE(rs_optimal_rates_24ghz_legacy
);
2621 if (rate
->bw
== RATE_MCS_CHAN_WIDTH_20
) {
2622 lq_sta
->optimal_rates
= rs_optimal_rates_vht_20mhz
;
2623 lq_sta
->optimal_nentries
=
2624 ARRAY_SIZE(rs_optimal_rates_vht_20mhz
);
2626 lq_sta
->optimal_rates
= rs_optimal_rates_vht_40_80mhz
;
2627 lq_sta
->optimal_nentries
=
2628 ARRAY_SIZE(rs_optimal_rates_vht_40_80mhz
);
2630 } else if (is_ht(rate
)) {
2631 lq_sta
->optimal_rates
= rs_optimal_rates_ht
;
2632 lq_sta
->optimal_nentries
= ARRAY_SIZE(rs_optimal_rates_ht
);
2636 /* Compute the optimal rate index based on RSSI */
2637 static struct rs_rate
*rs_get_optimal_rate(struct iwl_mvm
*mvm
,
2638 struct iwl_lq_sta
*lq_sta
)
2640 struct rs_rate
*rate
= &lq_sta
->optimal_rate
;
2643 rate
->index
= find_first_bit(&lq_sta
->optimal_rate_mask
,
2646 for (i
= 0; i
< lq_sta
->optimal_nentries
; i
++) {
2647 int rate_idx
= lq_sta
->optimal_rates
[i
].rate_idx
;
2649 if ((lq_sta
->pers
.last_rssi
>= lq_sta
->optimal_rates
[i
].rssi
) &&
2650 (BIT(rate_idx
) & lq_sta
->optimal_rate_mask
)) {
2651 rate
->index
= rate_idx
;
2659 /* Choose an initial legacy rate and antenna to use based on the RSSI
2662 static void rs_get_initial_rate(struct iwl_mvm
*mvm
,
2663 struct ieee80211_sta
*sta
,
2664 struct iwl_lq_sta
*lq_sta
,
2665 enum ieee80211_band band
,
2666 struct rs_rate
*rate
)
2669 unsigned long active_rate
;
2670 s8 best_rssi
= S8_MIN
;
2671 u8 best_ant
= ANT_NONE
;
2672 u8 valid_tx_ant
= iwl_mvm_get_valid_tx_ant(mvm
);
2673 const struct rs_init_rate_info
*initial_rates
;
2675 for (i
= 0; i
< ARRAY_SIZE(lq_sta
->pers
.chain_signal
); i
++) {
2676 if (!(lq_sta
->pers
.chains
& BIT(i
)))
2679 if (lq_sta
->pers
.chain_signal
[i
] > best_rssi
) {
2680 best_rssi
= lq_sta
->pers
.chain_signal
[i
];
2685 IWL_DEBUG_RATE(mvm
, "Best ANT: %s Best RSSI: %d\n",
2686 rs_pretty_ant(best_ant
), best_rssi
);
2688 if (best_ant
!= ANT_A
&& best_ant
!= ANT_B
)
2689 rate
->ant
= first_antenna(valid_tx_ant
);
2691 rate
->ant
= best_ant
;
2695 rate
->bw
= RATE_MCS_CHAN_WIDTH_20
;
2697 rate
->index
= find_first_bit(&lq_sta
->active_legacy_rate
,
2700 if (band
== IEEE80211_BAND_5GHZ
) {
2701 rate
->type
= LQ_LEGACY_A
;
2702 initial_rates
= rs_optimal_rates_5ghz_legacy
;
2703 nentries
= ARRAY_SIZE(rs_optimal_rates_5ghz_legacy
);
2705 rate
->type
= LQ_LEGACY_G
;
2706 initial_rates
= rs_optimal_rates_24ghz_legacy
;
2707 nentries
= ARRAY_SIZE(rs_optimal_rates_24ghz_legacy
);
2710 if (!IWL_MVM_RS_RSSI_BASED_INIT_RATE
)
2713 /* Start from a higher rate if the corresponding debug capability
2714 * is enabled. The rate is chosen according to AP capabilities.
2715 * In case of VHT/HT when the rssi is low fallback to the case of
2718 if (sta
->vht_cap
.vht_supported
&&
2719 best_rssi
> IWL_RS_LOW_RSSI_THRESHOLD
) {
2720 if (sta
->bandwidth
>= IEEE80211_STA_RX_BW_40
) {
2721 initial_rates
= rs_optimal_rates_vht_40_80mhz
;
2722 nentries
= ARRAY_SIZE(rs_optimal_rates_vht_40_80mhz
);
2723 if (sta
->bandwidth
>= IEEE80211_STA_RX_BW_80
)
2724 rate
->bw
= RATE_MCS_CHAN_WIDTH_80
;
2726 rate
->bw
= RATE_MCS_CHAN_WIDTH_40
;
2727 } else if (sta
->bandwidth
== IEEE80211_STA_RX_BW_20
) {
2728 initial_rates
= rs_optimal_rates_vht_20mhz
;
2729 nentries
= ARRAY_SIZE(rs_optimal_rates_vht_20mhz
);
2730 rate
->bw
= RATE_MCS_CHAN_WIDTH_20
;
2732 IWL_ERR(mvm
, "Invalid BW %d\n", sta
->bandwidth
);
2735 active_rate
= lq_sta
->active_siso_rate
;
2736 rate
->type
= LQ_VHT_SISO
;
2737 } else if (sta
->ht_cap
.ht_supported
&&
2738 best_rssi
> IWL_RS_LOW_RSSI_THRESHOLD
) {
2739 initial_rates
= rs_optimal_rates_ht
;
2740 nentries
= ARRAY_SIZE(rs_optimal_rates_ht
);
2741 active_rate
= lq_sta
->active_siso_rate
;
2742 rate
->type
= LQ_HT_SISO
;
2744 active_rate
= lq_sta
->active_legacy_rate
;
2747 for (i
= 0; i
< nentries
; i
++) {
2748 int rate_idx
= initial_rates
[i
].rate_idx
;
2750 if ((best_rssi
>= initial_rates
[i
].rssi
) &&
2751 (BIT(rate_idx
) & active_rate
)) {
2752 rate
->index
= rate_idx
;
2758 rs_dump_rate(mvm
, rate
, "INITIAL");
2761 /* Save info about RSSI of last Rx */
2762 void rs_update_last_rssi(struct iwl_mvm
*mvm
,
2763 struct iwl_lq_sta
*lq_sta
,
2764 struct ieee80211_rx_status
*rx_status
)
2768 lq_sta
->pers
.chains
= rx_status
->chains
;
2769 lq_sta
->pers
.chain_signal
[0] = rx_status
->chain_signal
[0];
2770 lq_sta
->pers
.chain_signal
[1] = rx_status
->chain_signal
[1];
2771 lq_sta
->pers
.chain_signal
[2] = rx_status
->chain_signal
[2];
2772 lq_sta
->pers
.last_rssi
= S8_MIN
;
2774 for (i
= 0; i
< ARRAY_SIZE(lq_sta
->pers
.chain_signal
); i
++) {
2775 if (!(lq_sta
->pers
.chains
& BIT(i
)))
2778 if (lq_sta
->pers
.chain_signal
[i
] > lq_sta
->pers
.last_rssi
)
2779 lq_sta
->pers
.last_rssi
= lq_sta
->pers
.chain_signal
[i
];
2784 * rs_initialize_lq - Initialize a station's hardware rate table
2786 * The uCode's station table contains a table of fallback rates
2787 * for automatic fallback during transmission.
2789 * NOTE: This sets up a default set of values. These will be replaced later
2790 * if the driver's iwl-agn-rs rate scaling algorithm is used, instead of
2793 * NOTE: Run REPLY_ADD_STA command to set up station table entry, before
2794 * calling this function (which runs REPLY_TX_LINK_QUALITY_CMD,
2795 * which requires station table entry to exist).
2797 static void rs_initialize_lq(struct iwl_mvm
*mvm
,
2798 struct ieee80211_sta
*sta
,
2799 struct iwl_lq_sta
*lq_sta
,
2800 enum ieee80211_band band
,
2803 struct iwl_scale_tbl_info
*tbl
;
2804 struct rs_rate
*rate
;
2807 if (!sta
|| !lq_sta
)
2810 if (!lq_sta
->search_better_tbl
)
2811 active_tbl
= lq_sta
->active_tbl
;
2813 active_tbl
= 1 - lq_sta
->active_tbl
;
2815 tbl
= &(lq_sta
->lq_info
[active_tbl
]);
2818 rs_get_initial_rate(mvm
, sta
, lq_sta
, band
, rate
);
2819 rs_init_optimal_rate(mvm
, sta
, lq_sta
);
2821 WARN_ON_ONCE(rate
->ant
!= ANT_A
&& rate
->ant
!= ANT_B
);
2822 tbl
->column
= rs_get_column_from_rate(rate
);
2824 rs_set_expected_tpt_table(lq_sta
, tbl
);
2825 rs_fill_lq_cmd(mvm
, sta
, lq_sta
, rate
);
2826 /* TODO restore station should remember the lq cmd */
2827 iwl_mvm_send_lq_cmd(mvm
, &lq_sta
->lq
, init
);
2830 static void rs_get_rate(void *mvm_r
, struct ieee80211_sta
*sta
, void *mvm_sta
,
2831 struct ieee80211_tx_rate_control
*txrc
)
2833 struct sk_buff
*skb
= txrc
->skb
;
2834 struct iwl_op_mode
*op_mode __maybe_unused
=
2835 (struct iwl_op_mode
*)mvm_r
;
2836 struct iwl_mvm
*mvm __maybe_unused
= IWL_OP_MODE_GET_MVM(op_mode
);
2837 struct ieee80211_tx_info
*info
= IEEE80211_SKB_CB(skb
);
2838 struct iwl_lq_sta
*lq_sta
= mvm_sta
;
2839 struct rs_rate
*optimal_rate
;
2840 u32 last_ucode_rate
;
2842 if (sta
&& !iwl_mvm_sta_from_mac80211(sta
)->vif
) {
2843 /* if vif isn't initialized mvm doesn't know about
2844 * this station, so don't do anything with the it
2850 /* TODO: handle rate_idx_mask and rate_idx_mcs_mask */
2852 /* Treat uninitialized rate scaling data same as non-existing. */
2853 if (lq_sta
&& !lq_sta
->pers
.drv
) {
2854 IWL_DEBUG_RATE(mvm
, "Rate scaling not initialized yet.\n");
2858 /* Send management frames and NO_ACK data using lowest rate. */
2859 if (rate_control_send_low(sta
, mvm_sta
, txrc
))
2862 iwl_mvm_hwrate_to_tx_rate(lq_sta
->last_rate_n_flags
,
2863 info
->band
, &info
->control
.rates
[0]);
2864 info
->control
.rates
[0].count
= 1;
2866 /* Report the optimal rate based on rssi and STA caps if we haven't
2867 * converged yet (too little traffic) or exploring other modulations
2869 if (lq_sta
->rs_state
!= RS_STATE_STAY_IN_COLUMN
) {
2870 optimal_rate
= rs_get_optimal_rate(mvm
, lq_sta
);
2871 last_ucode_rate
= ucode_rate_from_rs_rate(mvm
,
2873 iwl_mvm_hwrate_to_tx_rate(last_ucode_rate
, info
->band
,
2874 &txrc
->reported_rate
);
2878 static void *rs_alloc_sta(void *mvm_rate
, struct ieee80211_sta
*sta
,
2881 struct iwl_mvm_sta
*sta_priv
= iwl_mvm_sta_from_mac80211(sta
);
2882 struct iwl_op_mode
*op_mode
= (struct iwl_op_mode
*)mvm_rate
;
2883 struct iwl_mvm
*mvm
= IWL_OP_MODE_GET_MVM(op_mode
);
2884 struct iwl_lq_sta
*lq_sta
= &sta_priv
->lq_sta
;
2886 IWL_DEBUG_RATE(mvm
, "create station rate scale window\n");
2888 lq_sta
->pers
.drv
= mvm
;
2889 #ifdef CONFIG_MAC80211_DEBUGFS
2890 lq_sta
->pers
.dbg_fixed_rate
= 0;
2891 lq_sta
->pers
.dbg_fixed_txp_reduction
= TPC_INVALID
;
2892 lq_sta
->pers
.ss_force
= RS_SS_FORCE_NONE
;
2894 lq_sta
->pers
.chains
= 0;
2895 memset(lq_sta
->pers
.chain_signal
, 0, sizeof(lq_sta
->pers
.chain_signal
));
2896 lq_sta
->pers
.last_rssi
= S8_MIN
;
2898 return &sta_priv
->lq_sta
;
2901 static int rs_vht_highest_rx_mcs_index(struct ieee80211_sta_vht_cap
*vht_cap
,
2904 u16 rx_mcs
= le16_to_cpu(vht_cap
->vht_mcs
.rx_mcs_map
) &
2905 (0x3 << (2 * (nss
- 1)));
2906 rx_mcs
>>= (2 * (nss
- 1));
2908 if (rx_mcs
== IEEE80211_VHT_MCS_SUPPORT_0_7
)
2909 return IWL_RATE_MCS_7_INDEX
;
2910 else if (rx_mcs
== IEEE80211_VHT_MCS_SUPPORT_0_8
)
2911 return IWL_RATE_MCS_8_INDEX
;
2912 else if (rx_mcs
== IEEE80211_VHT_MCS_SUPPORT_0_9
)
2913 return IWL_RATE_MCS_9_INDEX
;
2915 WARN_ON_ONCE(rx_mcs
!= IEEE80211_VHT_MCS_NOT_SUPPORTED
);
2919 static void rs_vht_set_enabled_rates(struct ieee80211_sta
*sta
,
2920 struct ieee80211_sta_vht_cap
*vht_cap
,
2921 struct iwl_lq_sta
*lq_sta
)
2924 int highest_mcs
= rs_vht_highest_rx_mcs_index(vht_cap
, 1);
2926 if (highest_mcs
>= IWL_RATE_MCS_0_INDEX
) {
2927 for (i
= IWL_RATE_MCS_0_INDEX
; i
<= highest_mcs
; i
++) {
2928 if (i
== IWL_RATE_9M_INDEX
)
2931 /* VHT MCS9 isn't valid for 20Mhz for NSS=1,2 */
2932 if (i
== IWL_RATE_MCS_9_INDEX
&&
2933 sta
->bandwidth
== IEEE80211_STA_RX_BW_20
)
2936 lq_sta
->active_siso_rate
|= BIT(i
);
2940 if (sta
->rx_nss
< 2)
2943 highest_mcs
= rs_vht_highest_rx_mcs_index(vht_cap
, 2);
2944 if (highest_mcs
>= IWL_RATE_MCS_0_INDEX
) {
2945 for (i
= IWL_RATE_MCS_0_INDEX
; i
<= highest_mcs
; i
++) {
2946 if (i
== IWL_RATE_9M_INDEX
)
2949 /* VHT MCS9 isn't valid for 20Mhz for NSS=1,2 */
2950 if (i
== IWL_RATE_MCS_9_INDEX
&&
2951 sta
->bandwidth
== IEEE80211_STA_RX_BW_20
)
2954 lq_sta
->active_mimo2_rate
|= BIT(i
);
2959 static void rs_ht_init(struct iwl_mvm
*mvm
,
2960 struct ieee80211_sta
*sta
,
2961 struct iwl_lq_sta
*lq_sta
,
2962 struct ieee80211_sta_ht_cap
*ht_cap
)
2964 /* active_siso_rate mask includes 9 MBits (bit 5),
2965 * and CCK (bits 0-3), supp_rates[] does not;
2966 * shift to convert format, force 9 MBits off.
2968 lq_sta
->active_siso_rate
= ht_cap
->mcs
.rx_mask
[0] << 1;
2969 lq_sta
->active_siso_rate
|= ht_cap
->mcs
.rx_mask
[0] & 0x1;
2970 lq_sta
->active_siso_rate
&= ~((u16
)0x2);
2971 lq_sta
->active_siso_rate
<<= IWL_FIRST_OFDM_RATE
;
2973 lq_sta
->active_mimo2_rate
= ht_cap
->mcs
.rx_mask
[1] << 1;
2974 lq_sta
->active_mimo2_rate
|= ht_cap
->mcs
.rx_mask
[1] & 0x1;
2975 lq_sta
->active_mimo2_rate
&= ~((u16
)0x2);
2976 lq_sta
->active_mimo2_rate
<<= IWL_FIRST_OFDM_RATE
;
2978 if (mvm
->cfg
->ht_params
->ldpc
&&
2979 (ht_cap
->cap
& IEEE80211_HT_CAP_LDPC_CODING
))
2980 lq_sta
->ldpc
= true;
2982 if (mvm
->cfg
->ht_params
->stbc
&&
2983 (num_of_ant(iwl_mvm_get_valid_tx_ant(mvm
)) > 1) &&
2984 (ht_cap
->cap
& IEEE80211_HT_CAP_RX_STBC
))
2985 lq_sta
->stbc_capable
= true;
2987 lq_sta
->is_vht
= false;
2990 static void rs_vht_init(struct iwl_mvm
*mvm
,
2991 struct ieee80211_sta
*sta
,
2992 struct iwl_lq_sta
*lq_sta
,
2993 struct ieee80211_sta_vht_cap
*vht_cap
)
2995 rs_vht_set_enabled_rates(sta
, vht_cap
, lq_sta
);
2997 if (mvm
->cfg
->ht_params
->ldpc
&&
2998 (vht_cap
->cap
& IEEE80211_VHT_CAP_RXLDPC
))
2999 lq_sta
->ldpc
= true;
3001 if (mvm
->cfg
->ht_params
->stbc
&&
3002 (num_of_ant(iwl_mvm_get_valid_tx_ant(mvm
)) > 1) &&
3003 (vht_cap
->cap
& IEEE80211_VHT_CAP_RXSTBC_MASK
))
3004 lq_sta
->stbc_capable
= true;
3006 if (fw_has_capa(&mvm
->fw
->ucode_capa
, IWL_UCODE_TLV_CAPA_BEAMFORMER
) &&
3007 (num_of_ant(iwl_mvm_get_valid_tx_ant(mvm
)) > 1) &&
3008 (vht_cap
->cap
& IEEE80211_VHT_CAP_SU_BEAMFORMEE_CAPABLE
))
3009 lq_sta
->bfer_capable
= true;
3011 lq_sta
->is_vht
= true;
3014 #ifdef CONFIG_IWLWIFI_DEBUGFS
3015 static void iwl_mvm_reset_frame_stats(struct iwl_mvm
*mvm
)
3017 spin_lock_bh(&mvm
->drv_stats_lock
);
3018 memset(&mvm
->drv_rx_stats
, 0, sizeof(mvm
->drv_rx_stats
));
3019 spin_unlock_bh(&mvm
->drv_stats_lock
);
3022 void iwl_mvm_update_frame_stats(struct iwl_mvm
*mvm
, u32 rate
, bool agg
)
3024 u8 nss
= 0, mcs
= 0;
3026 spin_lock(&mvm
->drv_stats_lock
);
3029 mvm
->drv_rx_stats
.agg_frames
++;
3031 mvm
->drv_rx_stats
.success_frames
++;
3033 switch (rate
& RATE_MCS_CHAN_WIDTH_MSK
) {
3034 case RATE_MCS_CHAN_WIDTH_20
:
3035 mvm
->drv_rx_stats
.bw_20_frames
++;
3037 case RATE_MCS_CHAN_WIDTH_40
:
3038 mvm
->drv_rx_stats
.bw_40_frames
++;
3040 case RATE_MCS_CHAN_WIDTH_80
:
3041 mvm
->drv_rx_stats
.bw_80_frames
++;
3044 WARN_ONCE(1, "bad BW. rate 0x%x", rate
);
3047 if (rate
& RATE_MCS_HT_MSK
) {
3048 mvm
->drv_rx_stats
.ht_frames
++;
3049 mcs
= rate
& RATE_HT_MCS_RATE_CODE_MSK
;
3050 nss
= ((rate
& RATE_HT_MCS_NSS_MSK
) >> RATE_HT_MCS_NSS_POS
) + 1;
3051 } else if (rate
& RATE_MCS_VHT_MSK
) {
3052 mvm
->drv_rx_stats
.vht_frames
++;
3053 mcs
= rate
& RATE_VHT_MCS_RATE_CODE_MSK
;
3054 nss
= ((rate
& RATE_VHT_MCS_NSS_MSK
) >>
3055 RATE_VHT_MCS_NSS_POS
) + 1;
3057 mvm
->drv_rx_stats
.legacy_frames
++;
3061 mvm
->drv_rx_stats
.siso_frames
++;
3063 mvm
->drv_rx_stats
.mimo2_frames
++;
3065 if (rate
& RATE_MCS_SGI_MSK
)
3066 mvm
->drv_rx_stats
.sgi_frames
++;
3068 mvm
->drv_rx_stats
.ngi_frames
++;
3070 mvm
->drv_rx_stats
.last_rates
[mvm
->drv_rx_stats
.last_frame_idx
] = rate
;
3071 mvm
->drv_rx_stats
.last_frame_idx
=
3072 (mvm
->drv_rx_stats
.last_frame_idx
+ 1) %
3073 ARRAY_SIZE(mvm
->drv_rx_stats
.last_rates
);
3075 spin_unlock(&mvm
->drv_stats_lock
);
3080 * Called after adding a new station to initialize rate scaling
3082 void iwl_mvm_rs_rate_init(struct iwl_mvm
*mvm
, struct ieee80211_sta
*sta
,
3083 enum ieee80211_band band
, bool init
)
3086 struct ieee80211_hw
*hw
= mvm
->hw
;
3087 struct ieee80211_sta_ht_cap
*ht_cap
= &sta
->ht_cap
;
3088 struct ieee80211_sta_vht_cap
*vht_cap
= &sta
->vht_cap
;
3089 struct iwl_mvm_sta
*sta_priv
= iwl_mvm_sta_from_mac80211(sta
);
3090 struct iwl_lq_sta
*lq_sta
= &sta_priv
->lq_sta
;
3091 struct ieee80211_supported_band
*sband
;
3092 unsigned long supp
; /* must be unsigned long for for_each_set_bit */
3094 /* clear all non-persistent lq data */
3095 memset(lq_sta
, 0, offsetof(typeof(*lq_sta
), pers
));
3097 sband
= hw
->wiphy
->bands
[band
];
3099 lq_sta
->lq
.sta_id
= sta_priv
->sta_id
;
3101 for (j
= 0; j
< LQ_SIZE
; j
++)
3102 rs_rate_scale_clear_tbl_windows(mvm
, &lq_sta
->lq_info
[j
]);
3104 lq_sta
->flush_timer
= 0;
3105 lq_sta
->last_tx
= jiffies
;
3108 "LQ: *** rate scale station global init for station %d ***\n",
3110 /* TODO: what is a good starting rate for STA? About middle? Maybe not
3111 * the lowest or the highest rate.. Could consider using RSSI from
3112 * previous packets? Need to have IEEE 802.1X auth succeed immediately
3115 lq_sta
->missed_rate_counter
= IWL_MVM_RS_MISSED_RATE_MAX
;
3116 lq_sta
->band
= sband
->band
;
3118 * active legacy rates as per supported rates bitmap
3120 supp
= sta
->supp_rates
[sband
->band
];
3121 lq_sta
->active_legacy_rate
= 0;
3122 for_each_set_bit(i
, &supp
, BITS_PER_LONG
)
3123 lq_sta
->active_legacy_rate
|= BIT(sband
->bitrates
[i
].hw_value
);
3125 /* TODO: should probably account for rx_highest for both HT/VHT */
3126 if (!vht_cap
|| !vht_cap
->vht_supported
)
3127 rs_ht_init(mvm
, sta
, lq_sta
, ht_cap
);
3129 rs_vht_init(mvm
, sta
, lq_sta
, vht_cap
);
3131 lq_sta
->max_legacy_rate_idx
=
3132 rs_get_max_rate_from_mask(lq_sta
->active_legacy_rate
);
3133 lq_sta
->max_siso_rate_idx
=
3134 rs_get_max_rate_from_mask(lq_sta
->active_siso_rate
);
3135 lq_sta
->max_mimo2_rate_idx
=
3136 rs_get_max_rate_from_mask(lq_sta
->active_mimo2_rate
);
3139 "LEGACY=%lX SISO=%lX MIMO2=%lX VHT=%d LDPC=%d STBC=%d BFER=%d\n",
3140 lq_sta
->active_legacy_rate
,
3141 lq_sta
->active_siso_rate
,
3142 lq_sta
->active_mimo2_rate
,
3143 lq_sta
->is_vht
, lq_sta
->ldpc
, lq_sta
->stbc_capable
,
3144 lq_sta
->bfer_capable
);
3145 IWL_DEBUG_RATE(mvm
, "MAX RATE: LEGACY=%d SISO=%d MIMO2=%d\n",
3146 lq_sta
->max_legacy_rate_idx
,
3147 lq_sta
->max_siso_rate_idx
,
3148 lq_sta
->max_mimo2_rate_idx
);
3150 /* These values will be overridden later */
3151 lq_sta
->lq
.single_stream_ant_msk
=
3152 first_antenna(iwl_mvm_get_valid_tx_ant(mvm
));
3153 lq_sta
->lq
.dual_stream_ant_msk
= ANT_AB
;
3155 /* as default allow aggregation for all tids */
3156 lq_sta
->tx_agg_tid_en
= IWL_AGG_ALL_TID
;
3158 #ifdef CONFIG_IWLWIFI_DEBUGFS
3159 iwl_mvm_reset_frame_stats(mvm
);
3161 rs_initialize_lq(mvm
, sta
, lq_sta
, band
, init
);
3164 static void rs_rate_update(void *mvm_r
,
3165 struct ieee80211_supported_band
*sband
,
3166 struct cfg80211_chan_def
*chandef
,
3167 struct ieee80211_sta
*sta
, void *priv_sta
,
3171 struct iwl_op_mode
*op_mode
=
3172 (struct iwl_op_mode
*)mvm_r
;
3173 struct iwl_mvm
*mvm
= IWL_OP_MODE_GET_MVM(op_mode
);
3175 if (!iwl_mvm_sta_from_mac80211(sta
)->vif
)
3178 /* Stop any ongoing aggregations as rs starts off assuming no agg */
3179 for (tid
= 0; tid
< IWL_MAX_TID_COUNT
; tid
++)
3180 ieee80211_stop_tx_ba_session(sta
, tid
);
3182 iwl_mvm_rs_rate_init(mvm
, sta
, sband
->band
, false);
3185 #ifdef CONFIG_MAC80211_DEBUGFS
3186 static void rs_build_rates_table_from_fixed(struct iwl_mvm
*mvm
,
3187 struct iwl_lq_cmd
*lq_cmd
,
3188 enum ieee80211_band band
,
3191 struct rs_rate rate
;
3193 int num_rates
= ARRAY_SIZE(lq_cmd
->rs_table
);
3194 __le32 ucode_rate_le32
= cpu_to_le32(ucode_rate
);
3195 u8 ant
= (ucode_rate
& RATE_MCS_ANT_ABC_MSK
) >> RATE_MCS_ANT_POS
;
3197 for (i
= 0; i
< num_rates
; i
++)
3198 lq_cmd
->rs_table
[i
] = ucode_rate_le32
;
3200 rs_rate_from_ucode_rate(ucode_rate
, band
, &rate
);
3203 lq_cmd
->mimo_delim
= num_rates
- 1;
3205 lq_cmd
->mimo_delim
= 0;
3207 lq_cmd
->reduced_tpc
= 0;
3209 if (num_of_ant(ant
) == 1)
3210 lq_cmd
->single_stream_ant_msk
= ant
;
3212 lq_cmd
->agg_frame_cnt_limit
= LINK_QUAL_AGG_FRAME_LIMIT_DEF
;
3214 #endif /* CONFIG_MAC80211_DEBUGFS */
3216 static void rs_fill_rates_for_column(struct iwl_mvm
*mvm
,
3217 struct iwl_lq_sta
*lq_sta
,
3218 struct rs_rate
*rate
,
3219 __le32
*rs_table
, int *rs_table_index
,
3220 int num_rates
, int num_retries
,
3221 u8 valid_tx_ant
, bool toggle_ant
)
3225 bool bottom_reached
= false;
3226 int prev_rate_idx
= rate
->index
;
3227 int end
= LINK_QUAL_MAX_RETRY_NUM
;
3228 int index
= *rs_table_index
;
3230 for (i
= 0; i
< num_rates
&& index
< end
; i
++) {
3231 for (j
= 0; j
< num_retries
&& index
< end
; j
++, index
++) {
3232 ucode_rate
= cpu_to_le32(ucode_rate_from_rs_rate(mvm
,
3234 rs_table
[index
] = ucode_rate
;
3236 rs_toggle_antenna(valid_tx_ant
, rate
);
3239 prev_rate_idx
= rate
->index
;
3240 bottom_reached
= rs_get_lower_rate_in_column(lq_sta
, rate
);
3241 if (bottom_reached
&& !is_legacy(rate
))
3245 if (!bottom_reached
&& !is_legacy(rate
))
3246 rate
->index
= prev_rate_idx
;
3248 *rs_table_index
= index
;
3251 /* Building the rate table is non trivial. When we're in MIMO2/VHT/80Mhz/SGI
3252 * column the rate table should look like this:
3254 * rate[0] 0x400D019 VHT | ANT: AB BW: 80Mhz MCS: 9 NSS: 2 SGI
3255 * rate[1] 0x400D019 VHT | ANT: AB BW: 80Mhz MCS: 9 NSS: 2 SGI
3256 * rate[2] 0x400D018 VHT | ANT: AB BW: 80Mhz MCS: 8 NSS: 2 SGI
3257 * rate[3] 0x400D018 VHT | ANT: AB BW: 80Mhz MCS: 8 NSS: 2 SGI
3258 * rate[4] 0x400D017 VHT | ANT: AB BW: 80Mhz MCS: 7 NSS: 2 SGI
3259 * rate[5] 0x400D017 VHT | ANT: AB BW: 80Mhz MCS: 7 NSS: 2 SGI
3260 * rate[6] 0x4005007 VHT | ANT: A BW: 80Mhz MCS: 7 NSS: 1 NGI
3261 * rate[7] 0x4009006 VHT | ANT: B BW: 80Mhz MCS: 6 NSS: 1 NGI
3262 * rate[8] 0x4005005 VHT | ANT: A BW: 80Mhz MCS: 5 NSS: 1 NGI
3263 * rate[9] 0x800B Legacy | ANT: B Rate: 36 Mbps
3264 * rate[10] 0x4009 Legacy | ANT: A Rate: 24 Mbps
3265 * rate[11] 0x8007 Legacy | ANT: B Rate: 18 Mbps
3266 * rate[12] 0x4005 Legacy | ANT: A Rate: 12 Mbps
3267 * rate[13] 0x800F Legacy | ANT: B Rate: 9 Mbps
3268 * rate[14] 0x400D Legacy | ANT: A Rate: 6 Mbps
3269 * rate[15] 0x800D Legacy | ANT: B Rate: 6 Mbps
3271 static void rs_build_rates_table(struct iwl_mvm
*mvm
,
3272 struct ieee80211_sta
*sta
,
3273 struct iwl_lq_sta
*lq_sta
,
3274 const struct rs_rate
*initial_rate
)
3276 struct rs_rate rate
;
3277 int num_rates
, num_retries
, index
= 0;
3278 u8 valid_tx_ant
= 0;
3279 struct iwl_lq_cmd
*lq_cmd
= &lq_sta
->lq
;
3280 bool toggle_ant
= false;
3282 memcpy(&rate
, initial_rate
, sizeof(rate
));
3284 valid_tx_ant
= iwl_mvm_get_valid_tx_ant(mvm
);
3286 /* TODO: remove old API when min FW API hits 14 */
3287 if (!fw_has_api(&mvm
->fw
->ucode_capa
, IWL_UCODE_TLV_API_LQ_SS_PARAMS
) &&
3288 rs_stbc_allow(mvm
, sta
, lq_sta
))
3291 if (is_siso(&rate
)) {
3292 num_rates
= IWL_MVM_RS_INITIAL_SISO_NUM_RATES
;
3293 num_retries
= IWL_MVM_RS_HT_VHT_RETRIES_PER_RATE
;
3294 } else if (is_mimo(&rate
)) {
3295 num_rates
= IWL_MVM_RS_INITIAL_MIMO_NUM_RATES
;
3296 num_retries
= IWL_MVM_RS_HT_VHT_RETRIES_PER_RATE
;
3298 num_rates
= IWL_MVM_RS_INITIAL_LEGACY_NUM_RATES
;
3299 num_retries
= IWL_MVM_RS_INITIAL_LEGACY_RETRIES
;
3303 rs_fill_rates_for_column(mvm
, lq_sta
, &rate
, lq_cmd
->rs_table
, &index
,
3304 num_rates
, num_retries
, valid_tx_ant
,
3307 rs_get_lower_rate_down_column(lq_sta
, &rate
);
3309 if (is_siso(&rate
)) {
3310 num_rates
= IWL_MVM_RS_SECONDARY_SISO_NUM_RATES
;
3311 num_retries
= IWL_MVM_RS_SECONDARY_SISO_RETRIES
;
3312 lq_cmd
->mimo_delim
= index
;
3313 } else if (is_legacy(&rate
)) {
3314 num_rates
= IWL_MVM_RS_SECONDARY_LEGACY_NUM_RATES
;
3315 num_retries
= IWL_MVM_RS_SECONDARY_LEGACY_RETRIES
;
3322 rs_fill_rates_for_column(mvm
, lq_sta
, &rate
, lq_cmd
->rs_table
, &index
,
3323 num_rates
, num_retries
, valid_tx_ant
,
3326 rs_get_lower_rate_down_column(lq_sta
, &rate
);
3328 num_rates
= IWL_MVM_RS_SECONDARY_LEGACY_NUM_RATES
;
3329 num_retries
= IWL_MVM_RS_SECONDARY_LEGACY_RETRIES
;
3331 rs_fill_rates_for_column(mvm
, lq_sta
, &rate
, lq_cmd
->rs_table
, &index
,
3332 num_rates
, num_retries
, valid_tx_ant
,
3337 struct rs_bfer_active_iter_data
{
3338 struct ieee80211_sta
*exclude_sta
;
3339 struct iwl_mvm_sta
*bfer_mvmsta
;
3342 static void rs_bfer_active_iter(void *_data
,
3343 struct ieee80211_sta
*sta
)
3345 struct rs_bfer_active_iter_data
*data
= _data
;
3346 struct iwl_mvm_sta
*mvmsta
= iwl_mvm_sta_from_mac80211(sta
);
3347 struct iwl_lq_cmd
*lq_cmd
= &mvmsta
->lq_sta
.lq
;
3348 u32 ss_params
= le32_to_cpu(lq_cmd
->ss_params
);
3350 if (sta
== data
->exclude_sta
)
3353 /* The current sta has BFER allowed */
3354 if (ss_params
& LQ_SS_BFER_ALLOWED
) {
3355 WARN_ON_ONCE(data
->bfer_mvmsta
!= NULL
);
3357 data
->bfer_mvmsta
= mvmsta
;
3361 static int rs_bfer_priority(struct iwl_mvm_sta
*sta
)
3364 enum nl80211_iftype viftype
= ieee80211_vif_type_p2p(sta
->vif
);
3367 case NL80211_IFTYPE_AP
:
3368 case NL80211_IFTYPE_P2P_GO
:
3371 case NL80211_IFTYPE_P2P_CLIENT
:
3374 case NL80211_IFTYPE_STATION
:
3378 WARN_ONCE(true, "viftype %d sta_id %d", viftype
, sta
->sta_id
);
3385 /* Returns >0 if sta1 has a higher BFER priority compared to sta2 */
3386 static int rs_bfer_priority_cmp(struct iwl_mvm_sta
*sta1
,
3387 struct iwl_mvm_sta
*sta2
)
3389 int prio1
= rs_bfer_priority(sta1
);
3390 int prio2
= rs_bfer_priority(sta2
);
3399 static void rs_set_lq_ss_params(struct iwl_mvm
*mvm
,
3400 struct ieee80211_sta
*sta
,
3401 struct iwl_lq_sta
*lq_sta
,
3402 const struct rs_rate
*initial_rate
)
3404 struct iwl_lq_cmd
*lq_cmd
= &lq_sta
->lq
;
3405 struct iwl_mvm_sta
*mvmsta
= iwl_mvm_sta_from_mac80211(sta
);
3406 struct rs_bfer_active_iter_data data
= {
3408 .bfer_mvmsta
= NULL
,
3410 struct iwl_mvm_sta
*bfer_mvmsta
= NULL
;
3411 u32 ss_params
= LQ_SS_PARAMS_VALID
;
3413 if (!iwl_mvm_bt_coex_is_mimo_allowed(mvm
, sta
))
3416 #ifdef CONFIG_MAC80211_DEBUGFS
3417 /* Check if forcing the decision is configured.
3418 * Note that SISO is forced by not allowing STBC or BFER
3420 if (lq_sta
->pers
.ss_force
== RS_SS_FORCE_STBC
)
3421 ss_params
|= (LQ_SS_STBC_1SS_ALLOWED
| LQ_SS_FORCE
);
3422 else if (lq_sta
->pers
.ss_force
== RS_SS_FORCE_BFER
)
3423 ss_params
|= (LQ_SS_BFER_ALLOWED
| LQ_SS_FORCE
);
3425 if (lq_sta
->pers
.ss_force
!= RS_SS_FORCE_NONE
) {
3426 IWL_DEBUG_RATE(mvm
, "Forcing single stream Tx decision %d\n",
3427 lq_sta
->pers
.ss_force
);
3432 if (lq_sta
->stbc_capable
)
3433 ss_params
|= LQ_SS_STBC_1SS_ALLOWED
;
3435 if (!lq_sta
->bfer_capable
)
3438 ieee80211_iterate_stations_atomic(mvm
->hw
,
3439 rs_bfer_active_iter
,
3441 bfer_mvmsta
= data
.bfer_mvmsta
;
3443 /* This code is safe as it doesn't run concurrently for different
3444 * stations. This is guaranteed by the fact that calls to
3445 * ieee80211_tx_status wouldn't run concurrently for a single HW.
3448 IWL_DEBUG_RATE(mvm
, "No sta with BFER allowed found. Allow\n");
3450 ss_params
|= LQ_SS_BFER_ALLOWED
;
3454 IWL_DEBUG_RATE(mvm
, "Found existing sta %d with BFER activated\n",
3455 bfer_mvmsta
->sta_id
);
3457 /* Disallow BFER on another STA if active and we're a higher priority */
3458 if (rs_bfer_priority_cmp(mvmsta
, bfer_mvmsta
) > 0) {
3459 struct iwl_lq_cmd
*bfersta_lq_cmd
= &bfer_mvmsta
->lq_sta
.lq
;
3460 u32 bfersta_ss_params
= le32_to_cpu(bfersta_lq_cmd
->ss_params
);
3462 bfersta_ss_params
&= ~LQ_SS_BFER_ALLOWED
;
3463 bfersta_lq_cmd
->ss_params
= cpu_to_le32(bfersta_ss_params
);
3464 iwl_mvm_send_lq_cmd(mvm
, bfersta_lq_cmd
, false);
3466 ss_params
|= LQ_SS_BFER_ALLOWED
;
3468 "Lower priority BFER sta found (%d). Switch BFER\n",
3469 bfer_mvmsta
->sta_id
);
3472 lq_cmd
->ss_params
= cpu_to_le32(ss_params
);
3475 static void rs_fill_lq_cmd(struct iwl_mvm
*mvm
,
3476 struct ieee80211_sta
*sta
,
3477 struct iwl_lq_sta
*lq_sta
,
3478 const struct rs_rate
*initial_rate
)
3480 struct iwl_lq_cmd
*lq_cmd
= &lq_sta
->lq
;
3481 struct iwl_mvm_sta
*mvmsta
;
3482 struct iwl_mvm_vif
*mvmvif
;
3484 lq_cmd
->agg_disable_start_th
= IWL_MVM_RS_AGG_DISABLE_START
;
3485 lq_cmd
->agg_time_limit
=
3486 cpu_to_le16(IWL_MVM_RS_AGG_TIME_LIMIT
);
3488 #ifdef CONFIG_MAC80211_DEBUGFS
3489 if (lq_sta
->pers
.dbg_fixed_rate
) {
3490 rs_build_rates_table_from_fixed(mvm
, lq_cmd
,
3492 lq_sta
->pers
.dbg_fixed_rate
);
3496 if (WARN_ON_ONCE(!sta
|| !initial_rate
))
3499 rs_build_rates_table(mvm
, sta
, lq_sta
, initial_rate
);
3501 if (fw_has_api(&mvm
->fw
->ucode_capa
, IWL_UCODE_TLV_API_LQ_SS_PARAMS
))
3502 rs_set_lq_ss_params(mvm
, sta
, lq_sta
, initial_rate
);
3504 mvmsta
= iwl_mvm_sta_from_mac80211(sta
);
3505 mvmvif
= iwl_mvm_vif_from_mac80211(mvmsta
->vif
);
3507 if (num_of_ant(initial_rate
->ant
) == 1)
3508 lq_cmd
->single_stream_ant_msk
= initial_rate
->ant
;
3510 lq_cmd
->agg_frame_cnt_limit
= mvmsta
->max_agg_bufsize
;
3513 * In case of low latency, tell the firmware to leave a frame in the
3514 * Tx Fifo so that it can start a transaction in the same TxOP. This
3515 * basically allows the firmware to send bursts.
3517 if (iwl_mvm_vif_low_latency(mvmvif
))
3518 lq_cmd
->agg_frame_cnt_limit
--;
3520 if (mvmsta
->vif
->p2p
)
3521 lq_cmd
->flags
|= LQ_FLAG_USE_RTS_MSK
;
3523 lq_cmd
->agg_time_limit
=
3524 cpu_to_le16(iwl_mvm_coex_agg_time_limit(mvm
, sta
));
3527 static void *rs_alloc(struct ieee80211_hw
*hw
, struct dentry
*debugfsdir
)
3531 /* rate scale requires free function to be implemented */
3532 static void rs_free(void *mvm_rate
)
3537 static void rs_free_sta(void *mvm_r
, struct ieee80211_sta
*sta
,
3540 struct iwl_op_mode
*op_mode __maybe_unused
= mvm_r
;
3541 struct iwl_mvm
*mvm __maybe_unused
= IWL_OP_MODE_GET_MVM(op_mode
);
3543 IWL_DEBUG_RATE(mvm
, "enter\n");
3544 IWL_DEBUG_RATE(mvm
, "leave\n");
3547 #ifdef CONFIG_MAC80211_DEBUGFS
3548 int rs_pretty_print_rate(char *buf
, const u32 rate
)
3552 u8 mcs
= 0, nss
= 0;
3553 u8 ant
= (rate
& RATE_MCS_ANT_ABC_MSK
) >> RATE_MCS_ANT_POS
;
3555 if (!(rate
& RATE_MCS_HT_MSK
) &&
3556 !(rate
& RATE_MCS_VHT_MSK
)) {
3557 int index
= iwl_hwrate_to_plcp_idx(rate
);
3559 return sprintf(buf
, "Legacy | ANT: %s Rate: %s Mbps\n",
3561 index
== IWL_RATE_INVALID
? "BAD" :
3562 iwl_rate_mcs
[index
].mbps
);
3565 if (rate
& RATE_MCS_VHT_MSK
) {
3567 mcs
= rate
& RATE_VHT_MCS_RATE_CODE_MSK
;
3568 nss
= ((rate
& RATE_VHT_MCS_NSS_MSK
)
3569 >> RATE_VHT_MCS_NSS_POS
) + 1;
3570 } else if (rate
& RATE_MCS_HT_MSK
) {
3572 mcs
= rate
& RATE_HT_MCS_INDEX_MSK
;
3574 type
= "Unknown"; /* shouldn't happen */
3577 switch (rate
& RATE_MCS_CHAN_WIDTH_MSK
) {
3578 case RATE_MCS_CHAN_WIDTH_20
:
3581 case RATE_MCS_CHAN_WIDTH_40
:
3584 case RATE_MCS_CHAN_WIDTH_80
:
3587 case RATE_MCS_CHAN_WIDTH_160
:
3594 return sprintf(buf
, "%s | ANT: %s BW: %s MCS: %d NSS: %d %s%s%s%s%s\n",
3595 type
, rs_pretty_ant(ant
), bw
, mcs
, nss
,
3596 (rate
& RATE_MCS_SGI_MSK
) ? "SGI " : "NGI ",
3597 (rate
& RATE_MCS_HT_STBC_MSK
) ? "STBC " : "",
3598 (rate
& RATE_MCS_LDPC_MSK
) ? "LDPC " : "",
3599 (rate
& RATE_MCS_BF_MSK
) ? "BF " : "",
3600 (rate
& RATE_MCS_ZLF_MSK
) ? "ZLF " : "");
3604 * Program the device to use fixed rate for frame transmit
3605 * This is for debugging/testing only
3606 * once the device start use fixed rate, we need to reload the module
3607 * to being back the normal operation.
3609 static void rs_program_fix_rate(struct iwl_mvm
*mvm
,
3610 struct iwl_lq_sta
*lq_sta
)
3612 lq_sta
->active_legacy_rate
= 0x0FFF; /* 1 - 54 MBits, includes CCK */
3613 lq_sta
->active_siso_rate
= 0x1FD0; /* 6 - 60 MBits, no 9, no CCK */
3614 lq_sta
->active_mimo2_rate
= 0x1FD0; /* 6 - 60 MBits, no 9, no CCK */
3616 IWL_DEBUG_RATE(mvm
, "sta_id %d rate 0x%X\n",
3617 lq_sta
->lq
.sta_id
, lq_sta
->pers
.dbg_fixed_rate
);
3619 if (lq_sta
->pers
.dbg_fixed_rate
) {
3620 rs_fill_lq_cmd(mvm
, NULL
, lq_sta
, NULL
);
3621 iwl_mvm_send_lq_cmd(lq_sta
->pers
.drv
, &lq_sta
->lq
, false);
3625 static ssize_t
rs_sta_dbgfs_scale_table_write(struct file
*file
,
3626 const char __user
*user_buf
, size_t count
, loff_t
*ppos
)
3628 struct iwl_lq_sta
*lq_sta
= file
->private_data
;
3629 struct iwl_mvm
*mvm
;
3634 mvm
= lq_sta
->pers
.drv
;
3635 memset(buf
, 0, sizeof(buf
));
3636 buf_size
= min(count
, sizeof(buf
) - 1);
3637 if (copy_from_user(buf
, user_buf
, buf_size
))
3640 if (sscanf(buf
, "%x", &parsed_rate
) == 1)
3641 lq_sta
->pers
.dbg_fixed_rate
= parsed_rate
;
3643 lq_sta
->pers
.dbg_fixed_rate
= 0;
3645 rs_program_fix_rate(mvm
, lq_sta
);
3650 static ssize_t
rs_sta_dbgfs_scale_table_read(struct file
*file
,
3651 char __user
*user_buf
, size_t count
, loff_t
*ppos
)
3658 struct iwl_lq_sta
*lq_sta
= file
->private_data
;
3659 struct iwl_mvm
*mvm
;
3660 struct iwl_scale_tbl_info
*tbl
= &(lq_sta
->lq_info
[lq_sta
->active_tbl
]);
3661 struct rs_rate
*rate
= &tbl
->rate
;
3663 mvm
= lq_sta
->pers
.drv
;
3664 buff
= kmalloc(2048, GFP_KERNEL
);
3668 desc
+= sprintf(buff
+desc
, "sta_id %d\n", lq_sta
->lq
.sta_id
);
3669 desc
+= sprintf(buff
+desc
, "failed=%d success=%d rate=0%lX\n",
3670 lq_sta
->total_failed
, lq_sta
->total_success
,
3671 lq_sta
->active_legacy_rate
);
3672 desc
+= sprintf(buff
+desc
, "fixed rate 0x%X\n",
3673 lq_sta
->pers
.dbg_fixed_rate
);
3674 desc
+= sprintf(buff
+desc
, "valid_tx_ant %s%s%s\n",
3675 (iwl_mvm_get_valid_tx_ant(mvm
) & ANT_A
) ? "ANT_A," : "",
3676 (iwl_mvm_get_valid_tx_ant(mvm
) & ANT_B
) ? "ANT_B," : "",
3677 (iwl_mvm_get_valid_tx_ant(mvm
) & ANT_C
) ? "ANT_C" : "");
3678 desc
+= sprintf(buff
+desc
, "lq type %s\n",
3679 (is_legacy(rate
)) ? "legacy" :
3680 is_vht(rate
) ? "VHT" : "HT");
3681 if (!is_legacy(rate
)) {
3682 desc
+= sprintf(buff
+ desc
, " %s",
3683 (is_siso(rate
)) ? "SISO" : "MIMO2");
3684 desc
+= sprintf(buff
+ desc
, " %s",
3685 (is_ht20(rate
)) ? "20MHz" :
3686 (is_ht40(rate
)) ? "40MHz" :
3687 (is_ht80(rate
)) ? "80Mhz" : "BAD BW");
3688 desc
+= sprintf(buff
+ desc
, " %s %s %s\n",
3689 (rate
->sgi
) ? "SGI" : "NGI",
3690 (rate
->ldpc
) ? "LDPC" : "BCC",
3691 (lq_sta
->is_agg
) ? "AGG on" : "");
3693 desc
+= sprintf(buff
+desc
, "last tx rate=0x%X\n",
3694 lq_sta
->last_rate_n_flags
);
3695 desc
+= sprintf(buff
+desc
,
3696 "general: flags=0x%X mimo-d=%d s-ant=0x%x d-ant=0x%x\n",
3698 lq_sta
->lq
.mimo_delim
,
3699 lq_sta
->lq
.single_stream_ant_msk
,
3700 lq_sta
->lq
.dual_stream_ant_msk
);
3702 desc
+= sprintf(buff
+desc
,
3703 "agg: time_limit=%d dist_start_th=%d frame_cnt_limit=%d\n",
3704 le16_to_cpu(lq_sta
->lq
.agg_time_limit
),
3705 lq_sta
->lq
.agg_disable_start_th
,
3706 lq_sta
->lq
.agg_frame_cnt_limit
);
3708 desc
+= sprintf(buff
+desc
, "reduced tpc=%d\n", lq_sta
->lq
.reduced_tpc
);
3709 ss_params
= le32_to_cpu(lq_sta
->lq
.ss_params
);
3710 desc
+= sprintf(buff
+desc
, "single stream params: %s%s%s%s\n",
3711 (ss_params
& LQ_SS_PARAMS_VALID
) ?
3712 "VALID" : "INVALID",
3713 (ss_params
& LQ_SS_BFER_ALLOWED
) ?
3715 (ss_params
& LQ_SS_STBC_1SS_ALLOWED
) ?
3717 (ss_params
& LQ_SS_FORCE
) ?
3719 desc
+= sprintf(buff
+desc
,
3720 "Start idx [0]=0x%x [1]=0x%x [2]=0x%x [3]=0x%x\n",
3721 lq_sta
->lq
.initial_rate_index
[0],
3722 lq_sta
->lq
.initial_rate_index
[1],
3723 lq_sta
->lq
.initial_rate_index
[2],
3724 lq_sta
->lq
.initial_rate_index
[3]);
3726 for (i
= 0; i
< LINK_QUAL_MAX_RETRY_NUM
; i
++) {
3727 u32 r
= le32_to_cpu(lq_sta
->lq
.rs_table
[i
]);
3729 desc
+= sprintf(buff
+desc
, " rate[%d] 0x%X ", i
, r
);
3730 desc
+= rs_pretty_print_rate(buff
+desc
, r
);
3733 ret
= simple_read_from_buffer(user_buf
, count
, ppos
, buff
, desc
);
3738 static const struct file_operations rs_sta_dbgfs_scale_table_ops
= {
3739 .write
= rs_sta_dbgfs_scale_table_write
,
3740 .read
= rs_sta_dbgfs_scale_table_read
,
3741 .open
= simple_open
,
3742 .llseek
= default_llseek
,
3744 static ssize_t
rs_sta_dbgfs_stats_table_read(struct file
*file
,
3745 char __user
*user_buf
, size_t count
, loff_t
*ppos
)
3751 struct iwl_scale_tbl_info
*tbl
;
3752 struct rs_rate
*rate
;
3753 struct iwl_lq_sta
*lq_sta
= file
->private_data
;
3755 buff
= kmalloc(1024, GFP_KERNEL
);
3759 for (i
= 0; i
< LQ_SIZE
; i
++) {
3760 tbl
= &(lq_sta
->lq_info
[i
]);
3762 desc
+= sprintf(buff
+desc
,
3763 "%s type=%d SGI=%d BW=%s DUP=0\n"
3765 lq_sta
->active_tbl
== i
? "*" : "x",
3768 is_ht20(rate
) ? "20Mhz" :
3769 is_ht40(rate
) ? "40Mhz" :
3770 is_ht80(rate
) ? "80Mhz" : "ERR",
3772 for (j
= 0; j
< IWL_RATE_COUNT
; j
++) {
3773 desc
+= sprintf(buff
+desc
,
3774 "counter=%d success=%d %%=%d\n",
3775 tbl
->win
[j
].counter
,
3776 tbl
->win
[j
].success_counter
,
3777 tbl
->win
[j
].success_ratio
);
3780 ret
= simple_read_from_buffer(user_buf
, count
, ppos
, buff
, desc
);
3785 static const struct file_operations rs_sta_dbgfs_stats_table_ops
= {
3786 .read
= rs_sta_dbgfs_stats_table_read
,
3787 .open
= simple_open
,
3788 .llseek
= default_llseek
,
3791 static ssize_t
rs_sta_dbgfs_drv_tx_stats_read(struct file
*file
,
3792 char __user
*user_buf
,
3793 size_t count
, loff_t
*ppos
)
3795 static const char * const column_name
[] = {
3796 [RS_COLUMN_LEGACY_ANT_A
] = "LEGACY_ANT_A",
3797 [RS_COLUMN_LEGACY_ANT_B
] = "LEGACY_ANT_B",
3798 [RS_COLUMN_SISO_ANT_A
] = "SISO_ANT_A",
3799 [RS_COLUMN_SISO_ANT_B
] = "SISO_ANT_B",
3800 [RS_COLUMN_SISO_ANT_A_SGI
] = "SISO_ANT_A_SGI",
3801 [RS_COLUMN_SISO_ANT_B_SGI
] = "SISO_ANT_B_SGI",
3802 [RS_COLUMN_MIMO2
] = "MIMO2",
3803 [RS_COLUMN_MIMO2_SGI
] = "MIMO2_SGI",
3806 static const char * const rate_name
[] = {
3807 [IWL_RATE_1M_INDEX
] = "1M",
3808 [IWL_RATE_2M_INDEX
] = "2M",
3809 [IWL_RATE_5M_INDEX
] = "5.5M",
3810 [IWL_RATE_11M_INDEX
] = "11M",
3811 [IWL_RATE_6M_INDEX
] = "6M|MCS0",
3812 [IWL_RATE_9M_INDEX
] = "9M",
3813 [IWL_RATE_12M_INDEX
] = "12M|MCS1",
3814 [IWL_RATE_18M_INDEX
] = "18M|MCS2",
3815 [IWL_RATE_24M_INDEX
] = "24M|MCS3",
3816 [IWL_RATE_36M_INDEX
] = "36M|MCS4",
3817 [IWL_RATE_48M_INDEX
] = "48M|MCS5",
3818 [IWL_RATE_54M_INDEX
] = "54M|MCS6",
3819 [IWL_RATE_MCS_7_INDEX
] = "MCS7",
3820 [IWL_RATE_MCS_8_INDEX
] = "MCS8",
3821 [IWL_RATE_MCS_9_INDEX
] = "MCS9",
3824 char *buff
, *pos
, *endpos
;
3827 struct iwl_lq_sta
*lq_sta
= file
->private_data
;
3828 struct rs_rate_stats
*stats
;
3829 static const size_t bufsz
= 1024;
3831 buff
= kmalloc(bufsz
, GFP_KERNEL
);
3836 endpos
= pos
+ bufsz
;
3838 pos
+= scnprintf(pos
, endpos
- pos
, "COLUMN,");
3839 for (rate
= 0; rate
< IWL_RATE_COUNT
; rate
++)
3840 pos
+= scnprintf(pos
, endpos
- pos
, "%s,", rate_name
[rate
]);
3841 pos
+= scnprintf(pos
, endpos
- pos
, "\n");
3843 for (col
= 0; col
< RS_COLUMN_COUNT
; col
++) {
3844 pos
+= scnprintf(pos
, endpos
- pos
,
3845 "%s,", column_name
[col
]);
3847 for (rate
= 0; rate
< IWL_RATE_COUNT
; rate
++) {
3848 stats
= &(lq_sta
->pers
.tx_stats
[col
][rate
]);
3849 pos
+= scnprintf(pos
, endpos
- pos
,
3854 pos
+= scnprintf(pos
, endpos
- pos
, "\n");
3857 ret
= simple_read_from_buffer(user_buf
, count
, ppos
, buff
, pos
- buff
);
3862 static ssize_t
rs_sta_dbgfs_drv_tx_stats_write(struct file
*file
,
3863 const char __user
*user_buf
,
3864 size_t count
, loff_t
*ppos
)
3866 struct iwl_lq_sta
*lq_sta
= file
->private_data
;
3867 memset(lq_sta
->pers
.tx_stats
, 0, sizeof(lq_sta
->pers
.tx_stats
));
3872 static const struct file_operations rs_sta_dbgfs_drv_tx_stats_ops
= {
3873 .read
= rs_sta_dbgfs_drv_tx_stats_read
,
3874 .write
= rs_sta_dbgfs_drv_tx_stats_write
,
3875 .open
= simple_open
,
3876 .llseek
= default_llseek
,
3879 static ssize_t
iwl_dbgfs_ss_force_read(struct file
*file
,
3880 char __user
*user_buf
,
3881 size_t count
, loff_t
*ppos
)
3883 struct iwl_lq_sta
*lq_sta
= file
->private_data
;
3885 int bufsz
= sizeof(buf
);
3887 static const char * const ss_force_name
[] = {
3888 [RS_SS_FORCE_NONE
] = "none",
3889 [RS_SS_FORCE_STBC
] = "stbc",
3890 [RS_SS_FORCE_BFER
] = "bfer",
3891 [RS_SS_FORCE_SISO
] = "siso",
3894 pos
+= scnprintf(buf
+pos
, bufsz
-pos
, "%s\n",
3895 ss_force_name
[lq_sta
->pers
.ss_force
]);
3896 return simple_read_from_buffer(user_buf
, count
, ppos
, buf
, pos
);
3899 static ssize_t
iwl_dbgfs_ss_force_write(struct iwl_lq_sta
*lq_sta
, char *buf
,
3900 size_t count
, loff_t
*ppos
)
3902 struct iwl_mvm
*mvm
= lq_sta
->pers
.drv
;
3905 if (!strncmp("none", buf
, 4)) {
3906 lq_sta
->pers
.ss_force
= RS_SS_FORCE_NONE
;
3907 } else if (!strncmp("siso", buf
, 4)) {
3908 lq_sta
->pers
.ss_force
= RS_SS_FORCE_SISO
;
3909 } else if (!strncmp("stbc", buf
, 4)) {
3910 if (lq_sta
->stbc_capable
) {
3911 lq_sta
->pers
.ss_force
= RS_SS_FORCE_STBC
;
3914 "can't force STBC. peer doesn't support\n");
3917 } else if (!strncmp("bfer", buf
, 4)) {
3918 if (lq_sta
->bfer_capable
) {
3919 lq_sta
->pers
.ss_force
= RS_SS_FORCE_BFER
;
3922 "can't force BFER. peer doesn't support\n");
3926 IWL_ERR(mvm
, "valid values none|siso|stbc|bfer\n");
3929 return ret
?: count
;
3932 #define MVM_DEBUGFS_READ_WRITE_FILE_OPS(name, bufsz) \
3933 _MVM_DEBUGFS_READ_WRITE_FILE_OPS(name, bufsz, struct iwl_lq_sta)
3934 #define MVM_DEBUGFS_ADD_FILE_RS(name, parent, mode) do { \
3935 if (!debugfs_create_file(#name, mode, parent, lq_sta, \
3936 &iwl_dbgfs_##name##_ops)) \
3940 MVM_DEBUGFS_READ_WRITE_FILE_OPS(ss_force
, 32);
3942 static void rs_add_debugfs(void *mvm
, void *priv_sta
, struct dentry
*dir
)
3944 struct iwl_lq_sta
*lq_sta
= priv_sta
;
3945 struct iwl_mvm_sta
*mvmsta
;
3947 mvmsta
= container_of(lq_sta
, struct iwl_mvm_sta
, lq_sta
);
3952 debugfs_create_file("rate_scale_table", S_IRUSR
| S_IWUSR
, dir
,
3953 lq_sta
, &rs_sta_dbgfs_scale_table_ops
);
3954 debugfs_create_file("rate_stats_table", S_IRUSR
, dir
,
3955 lq_sta
, &rs_sta_dbgfs_stats_table_ops
);
3956 debugfs_create_file("drv_tx_stats", S_IRUSR
| S_IWUSR
, dir
,
3957 lq_sta
, &rs_sta_dbgfs_drv_tx_stats_ops
);
3958 debugfs_create_u8("tx_agg_tid_enable", S_IRUSR
| S_IWUSR
, dir
,
3959 &lq_sta
->tx_agg_tid_en
);
3960 debugfs_create_u8("reduced_tpc", S_IRUSR
| S_IWUSR
, dir
,
3961 &lq_sta
->pers
.dbg_fixed_txp_reduction
);
3963 MVM_DEBUGFS_ADD_FILE_RS(ss_force
, dir
, S_IRUSR
| S_IWUSR
);
3966 IWL_ERR((struct iwl_mvm
*)mvm
, "Can't create debugfs entity\n");
3969 static void rs_remove_debugfs(void *mvm
, void *mvm_sta
)
3975 * Initialization of rate scaling information is done by driver after
3976 * the station is added. Since mac80211 calls this function before a
3977 * station is added we ignore it.
3979 static void rs_rate_init_stub(void *mvm_r
,
3980 struct ieee80211_supported_band
*sband
,
3981 struct cfg80211_chan_def
*chandef
,
3982 struct ieee80211_sta
*sta
, void *mvm_sta
)
3986 static const struct rate_control_ops rs_mvm_ops
= {
3988 .tx_status
= rs_mac80211_tx_status
,
3989 .get_rate
= rs_get_rate
,
3990 .rate_init
= rs_rate_init_stub
,
3993 .alloc_sta
= rs_alloc_sta
,
3994 .free_sta
= rs_free_sta
,
3995 .rate_update
= rs_rate_update
,
3996 #ifdef CONFIG_MAC80211_DEBUGFS
3997 .add_sta_debugfs
= rs_add_debugfs
,
3998 .remove_sta_debugfs
= rs_remove_debugfs
,
4002 int iwl_mvm_rate_control_register(void)
4004 return ieee80211_rate_control_register(&rs_mvm_ops
);
4007 void iwl_mvm_rate_control_unregister(void)
4009 ieee80211_rate_control_unregister(&rs_mvm_ops
);
4013 * iwl_mvm_tx_protection - Gets LQ command, change it to enable/disable
4014 * Tx protection, according to this request and previous requests,
4015 * and send the LQ command.
4016 * @mvmsta: The station
4017 * @enable: Enable Tx protection?
4019 int iwl_mvm_tx_protection(struct iwl_mvm
*mvm
, struct iwl_mvm_sta
*mvmsta
,
4022 struct iwl_lq_cmd
*lq
= &mvmsta
->lq_sta
.lq
;
4024 lockdep_assert_held(&mvm
->mutex
);
4027 if (mvmsta
->tx_protection
== 0)
4028 lq
->flags
|= LQ_FLAG_USE_RTS_MSK
;
4029 mvmsta
->tx_protection
++;
4031 mvmsta
->tx_protection
--;
4032 if (mvmsta
->tx_protection
== 0)
4033 lq
->flags
&= ~LQ_FLAG_USE_RTS_MSK
;
4036 return iwl_mvm_send_lq_cmd(mvm
, lq
, false);