1 /******************************************************************************
3 * Copyright(c) 2005 - 2014 Intel Corporation. All rights reserved.
4 * Copyright(c) 2013 - 2015 Intel Mobile Communications GmbH
5 * Copyright(c) 2016 - 2017 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 if (!sta
->ht_cap
.ht_supported
)
167 if (sta
->smps_mode
== IEEE80211_SMPS_STATIC
)
170 if (num_of_ant(iwl_mvm_get_valid_tx_ant(mvm
)) < 2)
173 if (!iwl_mvm_bt_coex_is_mimo_allowed(mvm
, sta
))
176 if (mvm
->nvm_data
->sku_cap_mimo_disabled
)
182 static bool rs_siso_allow(struct iwl_mvm
*mvm
, struct ieee80211_sta
*sta
,
183 struct rs_rate
*rate
,
184 const struct rs_tx_column
*next_col
)
186 if (!sta
->ht_cap
.ht_supported
)
192 static bool rs_sgi_allow(struct iwl_mvm
*mvm
, struct ieee80211_sta
*sta
,
193 struct rs_rate
*rate
,
194 const struct rs_tx_column
*next_col
)
196 struct ieee80211_sta_ht_cap
*ht_cap
= &sta
->ht_cap
;
197 struct ieee80211_sta_vht_cap
*vht_cap
= &sta
->vht_cap
;
199 if (is_ht20(rate
) && (ht_cap
->cap
&
200 IEEE80211_HT_CAP_SGI_20
))
202 if (is_ht40(rate
) && (ht_cap
->cap
&
203 IEEE80211_HT_CAP_SGI_40
))
205 if (is_ht80(rate
) && (vht_cap
->cap
&
206 IEEE80211_VHT_CAP_SHORT_GI_80
))
208 if (is_ht160(rate
) && (vht_cap
->cap
&
209 IEEE80211_VHT_CAP_SHORT_GI_160
))
215 static const struct rs_tx_column rs_tx_columns
[] = {
216 [RS_COLUMN_LEGACY_ANT_A
] = {
220 RS_COLUMN_LEGACY_ANT_B
,
221 RS_COLUMN_SISO_ANT_A
,
232 [RS_COLUMN_LEGACY_ANT_B
] = {
236 RS_COLUMN_LEGACY_ANT_A
,
237 RS_COLUMN_SISO_ANT_B
,
248 [RS_COLUMN_SISO_ANT_A
] = {
252 RS_COLUMN_SISO_ANT_B
,
254 RS_COLUMN_SISO_ANT_A_SGI
,
255 RS_COLUMN_LEGACY_ANT_A
,
256 RS_COLUMN_LEGACY_ANT_B
,
265 [RS_COLUMN_SISO_ANT_B
] = {
269 RS_COLUMN_SISO_ANT_A
,
271 RS_COLUMN_SISO_ANT_B_SGI
,
272 RS_COLUMN_LEGACY_ANT_A
,
273 RS_COLUMN_LEGACY_ANT_B
,
282 [RS_COLUMN_SISO_ANT_A_SGI
] = {
287 RS_COLUMN_SISO_ANT_B_SGI
,
289 RS_COLUMN_SISO_ANT_A
,
290 RS_COLUMN_LEGACY_ANT_A
,
291 RS_COLUMN_LEGACY_ANT_B
,
301 [RS_COLUMN_SISO_ANT_B_SGI
] = {
306 RS_COLUMN_SISO_ANT_A_SGI
,
308 RS_COLUMN_SISO_ANT_B
,
309 RS_COLUMN_LEGACY_ANT_A
,
310 RS_COLUMN_LEGACY_ANT_B
,
320 [RS_COLUMN_MIMO2
] = {
324 RS_COLUMN_SISO_ANT_A
,
326 RS_COLUMN_LEGACY_ANT_A
,
327 RS_COLUMN_LEGACY_ANT_B
,
336 [RS_COLUMN_MIMO2_SGI
] = {
341 RS_COLUMN_SISO_ANT_A_SGI
,
343 RS_COLUMN_LEGACY_ANT_A
,
344 RS_COLUMN_LEGACY_ANT_B
,
356 static inline u8
rs_extract_rate(u32 rate_n_flags
)
358 /* also works for HT because bits 7:6 are zero there */
359 return (u8
)(rate_n_flags
& RATE_LEGACY_RATE_MSK
);
362 static int iwl_hwrate_to_plcp_idx(u32 rate_n_flags
)
366 if (rate_n_flags
& RATE_MCS_HT_MSK
) {
367 idx
= rate_n_flags
& RATE_HT_MCS_RATE_CODE_MSK
;
368 idx
+= IWL_RATE_MCS_0_INDEX
;
370 /* skip 9M not supported in HT*/
371 if (idx
>= IWL_RATE_9M_INDEX
)
373 if ((idx
>= IWL_FIRST_HT_RATE
) && (idx
<= IWL_LAST_HT_RATE
))
375 } else if (rate_n_flags
& RATE_MCS_VHT_MSK
) {
376 idx
= rate_n_flags
& RATE_VHT_MCS_RATE_CODE_MSK
;
377 idx
+= IWL_RATE_MCS_0_INDEX
;
379 /* skip 9M not supported in VHT*/
380 if (idx
>= IWL_RATE_9M_INDEX
)
382 if ((idx
>= IWL_FIRST_VHT_RATE
) && (idx
<= IWL_LAST_VHT_RATE
))
385 /* legacy rate format, search for match in table */
387 u8 legacy_rate
= rs_extract_rate(rate_n_flags
);
388 for (idx
= 0; idx
< ARRAY_SIZE(iwl_rates
); idx
++)
389 if (iwl_rates
[idx
].plcp
== legacy_rate
)
393 return IWL_RATE_INVALID
;
396 static void rs_rate_scale_perform(struct iwl_mvm
*mvm
,
397 struct ieee80211_sta
*sta
,
398 struct iwl_lq_sta
*lq_sta
,
400 static void rs_fill_lq_cmd(struct iwl_mvm
*mvm
,
401 struct ieee80211_sta
*sta
,
402 struct iwl_lq_sta
*lq_sta
,
403 const struct rs_rate
*initial_rate
);
404 static void rs_stay_in_table(struct iwl_lq_sta
*lq_sta
, bool force_search
);
407 * The following tables contain the expected throughput metrics for all rates
409 * 1, 2, 5.5, 11, 6, 9, 12, 18, 24, 36, 48, 54, 60 MBits
411 * where invalid entries are zeros.
413 * CCK rates are only valid in legacy table and will only be used in G
417 static const u16 expected_tpt_legacy
[IWL_RATE_COUNT
] = {
418 7, 13, 35, 58, 40, 57, 72, 98, 121, 154, 177, 186, 0, 0, 0
421 /* Expected TpT tables. 4 indexes:
422 * 0 - NGI, 1 - SGI, 2 - AGG+NGI, 3 - AGG+SGI
424 static const u16 expected_tpt_siso_20MHz
[4][IWL_RATE_COUNT
] = {
425 {0, 0, 0, 0, 42, 0, 76, 102, 124, 159, 183, 193, 202, 216, 0},
426 {0, 0, 0, 0, 46, 0, 82, 110, 132, 168, 192, 202, 210, 225, 0},
427 {0, 0, 0, 0, 49, 0, 97, 145, 192, 285, 375, 420, 464, 551, 0},
428 {0, 0, 0, 0, 54, 0, 108, 160, 213, 315, 415, 465, 513, 608, 0},
431 static const u16 expected_tpt_siso_40MHz
[4][IWL_RATE_COUNT
] = {
432 {0, 0, 0, 0, 77, 0, 127, 160, 184, 220, 242, 250, 257, 269, 275},
433 {0, 0, 0, 0, 83, 0, 135, 169, 193, 229, 250, 257, 264, 275, 280},
434 {0, 0, 0, 0, 101, 0, 199, 295, 389, 570, 744, 828, 911, 1070, 1173},
435 {0, 0, 0, 0, 112, 0, 220, 326, 429, 629, 819, 912, 1000, 1173, 1284},
438 static const u16 expected_tpt_siso_80MHz
[4][IWL_RATE_COUNT
] = {
439 {0, 0, 0, 0, 130, 0, 191, 223, 244, 273, 288, 294, 298, 305, 308},
440 {0, 0, 0, 0, 138, 0, 200, 231, 251, 279, 293, 298, 302, 308, 312},
441 {0, 0, 0, 0, 217, 0, 429, 634, 834, 1220, 1585, 1760, 1931, 2258, 2466},
442 {0, 0, 0, 0, 241, 0, 475, 701, 921, 1343, 1741, 1931, 2117, 2468, 2691},
445 static const u16 expected_tpt_siso_160MHz
[4][IWL_RATE_COUNT
] = {
446 {0, 0, 0, 0, 191, 0, 244, 288, 298, 308, 313, 318, 323, 328, 330},
447 {0, 0, 0, 0, 200, 0, 251, 293, 302, 312, 317, 322, 327, 332, 334},
448 {0, 0, 0, 0, 439, 0, 875, 1307, 1736, 2584, 3419, 3831, 4240, 5049, 5581},
449 {0, 0, 0, 0, 488, 0, 972, 1451, 1925, 2864, 3785, 4240, 4691, 5581, 6165},
452 static const u16 expected_tpt_mimo2_20MHz
[4][IWL_RATE_COUNT
] = {
453 {0, 0, 0, 0, 74, 0, 123, 155, 179, 213, 235, 243, 250, 261, 0},
454 {0, 0, 0, 0, 81, 0, 131, 164, 187, 221, 242, 250, 256, 267, 0},
455 {0, 0, 0, 0, 98, 0, 193, 286, 375, 550, 718, 799, 878, 1032, 0},
456 {0, 0, 0, 0, 109, 0, 214, 316, 414, 607, 790, 879, 965, 1132, 0},
459 static const u16 expected_tpt_mimo2_40MHz
[4][IWL_RATE_COUNT
] = {
460 {0, 0, 0, 0, 123, 0, 182, 214, 235, 264, 279, 285, 289, 296, 300},
461 {0, 0, 0, 0, 131, 0, 191, 222, 242, 270, 284, 289, 293, 300, 303},
462 {0, 0, 0, 0, 200, 0, 390, 571, 741, 1067, 1365, 1505, 1640, 1894, 2053},
463 {0, 0, 0, 0, 221, 0, 430, 630, 816, 1169, 1490, 1641, 1784, 2053, 2221},
466 static const u16 expected_tpt_mimo2_80MHz
[4][IWL_RATE_COUNT
] = {
467 {0, 0, 0, 0, 182, 0, 240, 264, 278, 299, 308, 311, 313, 317, 319},
468 {0, 0, 0, 0, 190, 0, 247, 269, 282, 302, 310, 313, 315, 319, 320},
469 {0, 0, 0, 0, 428, 0, 833, 1215, 1577, 2254, 2863, 3147, 3418, 3913, 4219},
470 {0, 0, 0, 0, 474, 0, 920, 1338, 1732, 2464, 3116, 3418, 3705, 4225, 4545},
473 static const u16 expected_tpt_mimo2_160MHz
[4][IWL_RATE_COUNT
] = {
474 {0, 0, 0, 0, 240, 0, 278, 308, 313, 319, 322, 324, 328, 330, 334},
475 {0, 0, 0, 0, 247, 0, 282, 310, 315, 320, 323, 325, 329, 332, 338},
476 {0, 0, 0, 0, 875, 0, 1735, 2582, 3414, 5043, 6619, 7389, 8147, 9629, 10592},
477 {0, 0, 0, 0, 971, 0, 1925, 2861, 3779, 5574, 7304, 8147, 8976, 10592, 11640},
481 static const struct iwl_rate_mcs_info iwl_rate_mcs
[IWL_RATE_COUNT
] = {
490 { "24", "16QAM 1/2"},
491 { "36", "16QAM 3/4"},
492 { "48", "64QAM 2/3"},
493 { "54", "64QAM 3/4"},
494 { "60", "64QAM 5/6"},
497 #define MCS_INDEX_PER_STREAM (8)
499 static const char *rs_pretty_ant(u8 ant
)
501 static const char * const ant_name
[] = {
515 return ant_name
[ant
];
518 static const char *rs_pretty_lq_type(enum iwl_table_type type
)
520 static const char * const lq_types
[] = {
522 [LQ_LEGACY_A
] = "LEGACY_A",
523 [LQ_LEGACY_G
] = "LEGACY_G",
524 [LQ_HT_SISO
] = "HT SISO",
525 [LQ_HT_MIMO2
] = "HT MIMO",
526 [LQ_VHT_SISO
] = "VHT SISO",
527 [LQ_VHT_MIMO2
] = "VHT MIMO",
530 if (type
< LQ_NONE
|| type
>= LQ_MAX
)
533 return lq_types
[type
];
536 static char *rs_pretty_rate(const struct rs_rate
*rate
)
539 static const char * const legacy_rates
[] = {
540 [IWL_RATE_1M_INDEX
] = "1M",
541 [IWL_RATE_2M_INDEX
] = "2M",
542 [IWL_RATE_5M_INDEX
] = "5.5M",
543 [IWL_RATE_11M_INDEX
] = "11M",
544 [IWL_RATE_6M_INDEX
] = "6M",
545 [IWL_RATE_9M_INDEX
] = "9M",
546 [IWL_RATE_12M_INDEX
] = "12M",
547 [IWL_RATE_18M_INDEX
] = "18M",
548 [IWL_RATE_24M_INDEX
] = "24M",
549 [IWL_RATE_36M_INDEX
] = "36M",
550 [IWL_RATE_48M_INDEX
] = "48M",
551 [IWL_RATE_54M_INDEX
] = "54M",
553 static const char *const ht_vht_rates
[] = {
554 [IWL_RATE_MCS_0_INDEX
] = "MCS0",
555 [IWL_RATE_MCS_1_INDEX
] = "MCS1",
556 [IWL_RATE_MCS_2_INDEX
] = "MCS2",
557 [IWL_RATE_MCS_3_INDEX
] = "MCS3",
558 [IWL_RATE_MCS_4_INDEX
] = "MCS4",
559 [IWL_RATE_MCS_5_INDEX
] = "MCS5",
560 [IWL_RATE_MCS_6_INDEX
] = "MCS6",
561 [IWL_RATE_MCS_7_INDEX
] = "MCS7",
562 [IWL_RATE_MCS_8_INDEX
] = "MCS8",
563 [IWL_RATE_MCS_9_INDEX
] = "MCS9",
565 const char *rate_str
;
567 if (is_type_legacy(rate
->type
) && (rate
->index
<= IWL_RATE_54M_INDEX
))
568 rate_str
= legacy_rates
[rate
->index
];
569 else if ((is_type_ht(rate
->type
) || is_type_vht(rate
->type
)) &&
570 (rate
->index
>= IWL_RATE_MCS_0_INDEX
) &&
571 (rate
->index
<= IWL_RATE_MCS_9_INDEX
))
572 rate_str
= ht_vht_rates
[rate
->index
];
574 rate_str
= "BAD_RATE";
576 sprintf(buf
, "(%s|%s|%s)", rs_pretty_lq_type(rate
->type
),
577 rs_pretty_ant(rate
->ant
), rate_str
);
581 static inline void rs_dump_rate(struct iwl_mvm
*mvm
, const struct rs_rate
*rate
,
585 "%s: %s BW: %d SGI: %d LDPC: %d STBC: %d\n",
586 prefix
, rs_pretty_rate(rate
), rate
->bw
,
587 rate
->sgi
, rate
->ldpc
, rate
->stbc
);
590 static void rs_rate_scale_clear_window(struct iwl_rate_scale_data
*window
)
593 window
->success_counter
= 0;
594 window
->success_ratio
= IWL_INVALID_VALUE
;
596 window
->average_tpt
= IWL_INVALID_VALUE
;
599 static void rs_rate_scale_clear_tbl_windows(struct iwl_mvm
*mvm
,
600 struct iwl_scale_tbl_info
*tbl
)
604 IWL_DEBUG_RATE(mvm
, "Clearing up window stats\n");
605 for (i
= 0; i
< IWL_RATE_COUNT
; i
++)
606 rs_rate_scale_clear_window(&tbl
->win
[i
]);
608 for (i
= 0; i
< ARRAY_SIZE(tbl
->tpc_win
); i
++)
609 rs_rate_scale_clear_window(&tbl
->tpc_win
[i
]);
612 static inline u8
rs_is_valid_ant(u8 valid_antenna
, u8 ant_type
)
614 return (ant_type
& valid_antenna
) == ant_type
;
617 static int rs_tl_turn_on_agg_for_tid(struct iwl_mvm
*mvm
,
618 struct iwl_lq_sta
*lq_data
, u8 tid
,
619 struct ieee80211_sta
*sta
)
623 IWL_DEBUG_HT(mvm
, "Starting Tx agg: STA: %pM tid: %d\n",
625 ret
= ieee80211_start_tx_ba_session(sta
, tid
, 5000);
626 if (ret
== -EAGAIN
) {
628 * driver and mac80211 is out of sync
629 * this might be cause by reloading firmware
630 * stop the tx ba session here
632 IWL_ERR(mvm
, "Fail start Tx agg on tid: %d\n",
634 ieee80211_stop_tx_ba_session(sta
, tid
);
639 static void rs_tl_turn_on_agg(struct iwl_mvm
*mvm
, u8 tid
,
640 struct iwl_lq_sta
*lq_data
,
641 struct ieee80211_sta
*sta
)
643 if (tid
< IWL_MAX_TID_COUNT
)
644 rs_tl_turn_on_agg_for_tid(mvm
, lq_data
, tid
, sta
);
646 IWL_ERR(mvm
, "tid exceeds max TID count: %d/%d\n",
647 tid
, IWL_MAX_TID_COUNT
);
650 static inline int get_num_of_ant_from_rate(u32 rate_n_flags
)
652 return !!(rate_n_flags
& RATE_MCS_ANT_A_MSK
) +
653 !!(rate_n_flags
& RATE_MCS_ANT_B_MSK
) +
654 !!(rate_n_flags
& RATE_MCS_ANT_C_MSK
);
658 * Static function to get the expected throughput from an iwl_scale_tbl_info
659 * that wraps a NULL pointer check
661 static s32
get_expected_tpt(struct iwl_scale_tbl_info
*tbl
, int rs_index
)
663 if (tbl
->expected_tpt
)
664 return tbl
->expected_tpt
[rs_index
];
669 * rs_collect_tx_data - Update the success/failure sliding window
671 * We keep a sliding window of the last 62 packets transmitted
672 * at this rate. window->data contains the bitmask of successful
675 static int _rs_collect_tx_data(struct iwl_mvm
*mvm
,
676 struct iwl_scale_tbl_info
*tbl
,
677 int scale_index
, int attempts
, int successes
,
678 struct iwl_rate_scale_data
*window
)
680 static const u64 mask
= (((u64
)1) << (IWL_RATE_MAX_WINDOW
- 1));
683 /* Get expected throughput */
684 tpt
= get_expected_tpt(tbl
, scale_index
);
687 * Keep track of only the latest 62 tx frame attempts in this rate's
688 * history window; anything older isn't really relevant any more.
689 * If we have filled up the sliding window, drop the oldest attempt;
690 * if the oldest attempt (highest bit in bitmap) shows "success",
691 * subtract "1" from the success counter (this is the main reason
692 * we keep these bitmaps!).
694 while (attempts
> 0) {
695 if (window
->counter
>= IWL_RATE_MAX_WINDOW
) {
696 /* remove earliest */
697 window
->counter
= IWL_RATE_MAX_WINDOW
- 1;
699 if (window
->data
& mask
) {
700 window
->data
&= ~mask
;
701 window
->success_counter
--;
705 /* Increment frames-attempted counter */
708 /* Shift bitmap by one frame to throw away oldest history */
711 /* Mark the most recent #successes attempts as successful */
713 window
->success_counter
++;
721 /* Calculate current success ratio, avoid divide-by-0! */
722 if (window
->counter
> 0)
723 window
->success_ratio
= 128 * (100 * window
->success_counter
)
726 window
->success_ratio
= IWL_INVALID_VALUE
;
728 fail_count
= window
->counter
- window
->success_counter
;
730 /* Calculate average throughput, if we have enough history. */
731 if ((fail_count
>= IWL_MVM_RS_RATE_MIN_FAILURE_TH
) ||
732 (window
->success_counter
>= IWL_MVM_RS_RATE_MIN_SUCCESS_TH
))
733 window
->average_tpt
= (window
->success_ratio
* tpt
+ 64) / 128;
735 window
->average_tpt
= IWL_INVALID_VALUE
;
740 static int rs_collect_tpc_data(struct iwl_mvm
*mvm
,
741 struct iwl_lq_sta
*lq_sta
,
742 struct iwl_scale_tbl_info
*tbl
,
743 int scale_index
, int attempts
, int successes
,
746 struct iwl_rate_scale_data
*window
= NULL
;
748 if (WARN_ON_ONCE(reduced_txp
> TPC_MAX_REDUCTION
))
751 window
= &tbl
->tpc_win
[reduced_txp
];
752 return _rs_collect_tx_data(mvm
, tbl
, scale_index
, attempts
, successes
,
756 static int rs_collect_tlc_data(struct iwl_mvm
*mvm
,
757 struct iwl_lq_sta
*lq_sta
,
758 struct iwl_scale_tbl_info
*tbl
,
759 int scale_index
, int attempts
, int successes
)
761 struct iwl_rate_scale_data
*window
= NULL
;
763 if (scale_index
< 0 || scale_index
>= IWL_RATE_COUNT
)
766 if (tbl
->column
!= RS_COLUMN_INVALID
) {
767 struct lq_sta_pers
*pers
= &lq_sta
->pers
;
769 pers
->tx_stats
[tbl
->column
][scale_index
].total
+= attempts
;
770 pers
->tx_stats
[tbl
->column
][scale_index
].success
+= successes
;
773 /* Select window for current tx bit rate */
774 window
= &(tbl
->win
[scale_index
]);
775 return _rs_collect_tx_data(mvm
, tbl
, scale_index
, attempts
, successes
,
779 /* Convert rs_rate object into ucode rate bitmask */
780 static u32
ucode_rate_from_rs_rate(struct iwl_mvm
*mvm
,
781 struct rs_rate
*rate
)
784 int index
= rate
->index
;
786 ucode_rate
|= ((rate
->ant
<< RATE_MCS_ANT_POS
) &
787 RATE_MCS_ANT_ABC_MSK
);
789 if (is_legacy(rate
)) {
790 ucode_rate
|= iwl_rates
[index
].plcp
;
791 if (index
>= IWL_FIRST_CCK_RATE
&& index
<= IWL_LAST_CCK_RATE
)
792 ucode_rate
|= RATE_MCS_CCK_MSK
;
797 if (index
< IWL_FIRST_HT_RATE
|| index
> IWL_LAST_HT_RATE
) {
798 IWL_ERR(mvm
, "Invalid HT rate index %d\n", index
);
799 index
= IWL_LAST_HT_RATE
;
801 ucode_rate
|= RATE_MCS_HT_MSK
;
803 if (is_ht_siso(rate
))
804 ucode_rate
|= iwl_rates
[index
].plcp_ht_siso
;
805 else if (is_ht_mimo2(rate
))
806 ucode_rate
|= iwl_rates
[index
].plcp_ht_mimo2
;
809 } else if (is_vht(rate
)) {
810 if (index
< IWL_FIRST_VHT_RATE
|| index
> IWL_LAST_VHT_RATE
) {
811 IWL_ERR(mvm
, "Invalid VHT rate index %d\n", index
);
812 index
= IWL_LAST_VHT_RATE
;
814 ucode_rate
|= RATE_MCS_VHT_MSK
;
815 if (is_vht_siso(rate
))
816 ucode_rate
|= iwl_rates
[index
].plcp_vht_siso
;
817 else if (is_vht_mimo2(rate
))
818 ucode_rate
|= iwl_rates
[index
].plcp_vht_mimo2
;
823 IWL_ERR(mvm
, "Invalid rate->type %d\n", rate
->type
);
826 if (is_siso(rate
) && rate
->stbc
) {
827 /* To enable STBC we need to set both a flag and ANT_AB */
828 ucode_rate
|= RATE_MCS_ANT_AB_MSK
;
829 ucode_rate
|= RATE_MCS_STBC_MSK
;
832 ucode_rate
|= rate
->bw
;
834 ucode_rate
|= RATE_MCS_SGI_MSK
;
836 ucode_rate
|= RATE_MCS_LDPC_MSK
;
841 /* Convert a ucode rate into an rs_rate object */
842 static int rs_rate_from_ucode_rate(const u32 ucode_rate
,
843 enum nl80211_band band
,
844 struct rs_rate
*rate
)
846 u32 ant_msk
= ucode_rate
& RATE_MCS_ANT_ABC_MSK
;
847 u8 num_of_ant
= get_num_of_ant_from_rate(ucode_rate
);
850 memset(rate
, 0, sizeof(*rate
));
851 rate
->index
= iwl_hwrate_to_plcp_idx(ucode_rate
);
853 if (rate
->index
== IWL_RATE_INVALID
)
856 rate
->ant
= (ant_msk
>> RATE_MCS_ANT_POS
);
859 if (!(ucode_rate
& RATE_MCS_HT_MSK
) &&
860 !(ucode_rate
& RATE_MCS_VHT_MSK
)) {
861 if (num_of_ant
== 1) {
862 if (band
== NL80211_BAND_5GHZ
)
863 rate
->type
= LQ_LEGACY_A
;
865 rate
->type
= LQ_LEGACY_G
;
872 if (ucode_rate
& RATE_MCS_SGI_MSK
)
874 if (ucode_rate
& RATE_MCS_LDPC_MSK
)
876 if (ucode_rate
& RATE_MCS_STBC_MSK
)
878 if (ucode_rate
& RATE_MCS_BF_MSK
)
881 rate
->bw
= ucode_rate
& RATE_MCS_CHAN_WIDTH_MSK
;
883 if (ucode_rate
& RATE_MCS_HT_MSK
) {
884 nss
= ((ucode_rate
& RATE_HT_MCS_NSS_MSK
) >>
885 RATE_HT_MCS_NSS_POS
) + 1;
888 rate
->type
= LQ_HT_SISO
;
889 WARN_ONCE(!rate
->stbc
&& !rate
->bfer
&& num_of_ant
!= 1,
891 rate
->stbc
, rate
->bfer
);
892 } else if (nss
== 2) {
893 rate
->type
= LQ_HT_MIMO2
;
894 WARN_ON_ONCE(num_of_ant
!= 2);
898 } else if (ucode_rate
& RATE_MCS_VHT_MSK
) {
899 nss
= ((ucode_rate
& RATE_VHT_MCS_NSS_MSK
) >>
900 RATE_VHT_MCS_NSS_POS
) + 1;
903 rate
->type
= LQ_VHT_SISO
;
904 WARN_ONCE(!rate
->stbc
&& !rate
->bfer
&& num_of_ant
!= 1,
906 rate
->stbc
, rate
->bfer
);
907 } else if (nss
== 2) {
908 rate
->type
= LQ_VHT_MIMO2
;
909 WARN_ON_ONCE(num_of_ant
!= 2);
915 WARN_ON_ONCE(rate
->bw
== RATE_MCS_CHAN_WIDTH_80
&&
921 /* switch to another antenna/antennas and return 1 */
922 /* if no other valid antenna found, return 0 */
923 static int rs_toggle_antenna(u32 valid_ant
, struct rs_rate
*rate
)
927 if (!rate
->ant
|| rate
->ant
> ANT_ABC
)
930 if (!rs_is_valid_ant(valid_ant
, rate
->ant
))
933 new_ant_type
= ant_toggle_lookup
[rate
->ant
];
935 while ((new_ant_type
!= rate
->ant
) &&
936 !rs_is_valid_ant(valid_ant
, new_ant_type
))
937 new_ant_type
= ant_toggle_lookup
[new_ant_type
];
939 if (new_ant_type
== rate
->ant
)
942 rate
->ant
= new_ant_type
;
947 static u16
rs_get_supported_rates(struct iwl_lq_sta
*lq_sta
,
948 struct rs_rate
*rate
)
951 return lq_sta
->active_legacy_rate
;
952 else if (is_siso(rate
))
953 return lq_sta
->active_siso_rate
;
954 else if (is_mimo2(rate
))
955 return lq_sta
->active_mimo2_rate
;
961 static u16
rs_get_adjacent_rate(struct iwl_mvm
*mvm
, u8 index
, u16 rate_mask
,
964 u8 high
= IWL_RATE_INVALID
;
965 u8 low
= IWL_RATE_INVALID
;
967 /* 802.11A or ht walks to the next literal adjacent rate in
969 if (is_type_a_band(rate_type
) || !is_type_legacy(rate_type
)) {
973 /* Find the previous rate that is in the rate mask */
977 for (; i
>= 0; i
--, mask
>>= 1) {
978 if (rate_mask
& mask
) {
984 /* Find the next rate that is in the rate mask */
986 for (mask
= (1 << i
); i
< IWL_RATE_COUNT
; i
++, mask
<<= 1) {
987 if (rate_mask
& mask
) {
993 return (high
<< 8) | low
;
997 while (low
!= IWL_RATE_INVALID
) {
998 low
= iwl_rates
[low
].prev_rs
;
999 if (low
== IWL_RATE_INVALID
)
1001 if (rate_mask
& (1 << low
))
1006 while (high
!= IWL_RATE_INVALID
) {
1007 high
= iwl_rates
[high
].next_rs
;
1008 if (high
== IWL_RATE_INVALID
)
1010 if (rate_mask
& (1 << high
))
1014 return (high
<< 8) | low
;
1017 static inline bool rs_rate_supported(struct iwl_lq_sta
*lq_sta
,
1018 struct rs_rate
*rate
)
1020 return BIT(rate
->index
) & rs_get_supported_rates(lq_sta
, rate
);
1023 /* Get the next supported lower rate in the current column.
1024 * Return true if bottom rate in the current column was reached
1026 static bool rs_get_lower_rate_in_column(struct iwl_lq_sta
*lq_sta
,
1027 struct rs_rate
*rate
)
1032 struct iwl_mvm
*mvm
= lq_sta
->pers
.drv
;
1034 rate_mask
= rs_get_supported_rates(lq_sta
, rate
);
1035 high_low
= rs_get_adjacent_rate(mvm
, rate
->index
, rate_mask
,
1037 low
= high_low
& 0xff;
1039 /* Bottom rate of column reached */
1040 if (low
== IWL_RATE_INVALID
)
1047 /* Get the next rate to use following a column downgrade */
1048 static void rs_get_lower_rate_down_column(struct iwl_lq_sta
*lq_sta
,
1049 struct rs_rate
*rate
)
1051 struct iwl_mvm
*mvm
= lq_sta
->pers
.drv
;
1053 if (is_legacy(rate
)) {
1054 /* No column to downgrade from Legacy */
1056 } else if (is_siso(rate
)) {
1057 /* Downgrade to Legacy if we were in SISO */
1058 if (lq_sta
->band
== NL80211_BAND_5GHZ
)
1059 rate
->type
= LQ_LEGACY_A
;
1061 rate
->type
= LQ_LEGACY_G
;
1063 rate
->bw
= RATE_MCS_CHAN_WIDTH_20
;
1065 WARN_ON_ONCE(rate
->index
< IWL_RATE_MCS_0_INDEX
||
1066 rate
->index
> IWL_RATE_MCS_9_INDEX
);
1068 rate
->index
= rs_ht_to_legacy
[rate
->index
];
1071 /* Downgrade to SISO with same MCS if in MIMO */
1072 rate
->type
= is_vht_mimo2(rate
) ?
1073 LQ_VHT_SISO
: LQ_HT_SISO
;
1076 if (num_of_ant(rate
->ant
) > 1)
1077 rate
->ant
= first_antenna(iwl_mvm_get_valid_tx_ant(mvm
));
1079 /* Relevant in both switching to SISO or Legacy */
1082 if (!rs_rate_supported(lq_sta
, rate
))
1083 rs_get_lower_rate_in_column(lq_sta
, rate
);
1086 /* Check if both rates share the same column */
1087 static inline bool rs_rate_column_match(struct rs_rate
*a
,
1092 if (a
->stbc
|| a
->bfer
)
1093 ant_match
= (b
->ant
== ANT_A
|| b
->ant
== ANT_B
);
1095 ant_match
= (a
->ant
== b
->ant
);
1097 return (a
->type
== b
->type
) && (a
->bw
== b
->bw
) && (a
->sgi
== b
->sgi
)
1101 static inline enum rs_column
rs_get_column_from_rate(struct rs_rate
*rate
)
1103 if (is_legacy(rate
)) {
1104 if (rate
->ant
== ANT_A
)
1105 return RS_COLUMN_LEGACY_ANT_A
;
1107 if (rate
->ant
== ANT_B
)
1108 return RS_COLUMN_LEGACY_ANT_B
;
1113 if (is_siso(rate
)) {
1114 if (rate
->ant
== ANT_A
|| rate
->stbc
|| rate
->bfer
)
1115 return rate
->sgi
? RS_COLUMN_SISO_ANT_A_SGI
:
1116 RS_COLUMN_SISO_ANT_A
;
1118 if (rate
->ant
== ANT_B
)
1119 return rate
->sgi
? RS_COLUMN_SISO_ANT_B_SGI
:
1120 RS_COLUMN_SISO_ANT_B
;
1126 return rate
->sgi
? RS_COLUMN_MIMO2_SGI
: RS_COLUMN_MIMO2
;
1129 return RS_COLUMN_INVALID
;
1132 static u8
rs_get_tid(struct ieee80211_hdr
*hdr
)
1134 u8 tid
= IWL_MAX_TID_COUNT
;
1136 if (ieee80211_is_data_qos(hdr
->frame_control
)) {
1137 u8
*qc
= ieee80211_get_qos_ctl(hdr
);
1141 if (unlikely(tid
> IWL_MAX_TID_COUNT
))
1142 tid
= IWL_MAX_TID_COUNT
;
1147 void iwl_mvm_rs_tx_status(struct iwl_mvm
*mvm
, struct ieee80211_sta
*sta
,
1148 int tid
, struct ieee80211_tx_info
*info
, bool ndp
)
1153 struct iwl_lq_cmd
*table
;
1155 struct rs_rate lq_rate
, tx_resp_rate
;
1156 struct iwl_scale_tbl_info
*curr_tbl
, *other_tbl
, *tmp_tbl
;
1157 u32 tlc_info
= (uintptr_t)info
->status
.status_driver_data
[0];
1158 u8 reduced_txp
= tlc_info
& RS_DRV_DATA_TXP_MSK
;
1159 u8 lq_color
= RS_DRV_DATA_LQ_COLOR_GET(tlc_info
);
1160 u32 tx_resp_hwrate
= (uintptr_t)info
->status
.status_driver_data
[1];
1161 struct iwl_mvm_sta
*mvmsta
= iwl_mvm_sta_from_mac80211(sta
);
1162 struct iwl_lq_sta
*lq_sta
= &mvmsta
->lq_sta
;
1164 /* Treat uninitialized rate scaling data same as non-existing. */
1166 IWL_DEBUG_RATE(mvm
, "Station rate scaling not created yet.\n");
1168 } else if (!lq_sta
->pers
.drv
) {
1169 IWL_DEBUG_RATE(mvm
, "Rate scaling not initialized yet.\n");
1173 /* This packet was aggregated but doesn't carry status info */
1174 if ((info
->flags
& IEEE80211_TX_CTL_AMPDU
) &&
1175 !(info
->flags
& IEEE80211_TX_STAT_AMPDU
))
1178 rs_rate_from_ucode_rate(tx_resp_hwrate
, info
->band
, &tx_resp_rate
);
1180 #ifdef CONFIG_MAC80211_DEBUGFS
1181 /* Disable last tx check if we are debugging with fixed rate but
1182 * update tx stats */
1183 if (lq_sta
->pers
.dbg_fixed_rate
) {
1184 int index
= tx_resp_rate
.index
;
1185 enum rs_column column
;
1186 int attempts
, success
;
1188 column
= rs_get_column_from_rate(&tx_resp_rate
);
1189 if (WARN_ONCE(column
== RS_COLUMN_INVALID
,
1190 "Can't map rate 0x%x to column",
1194 if (info
->flags
& IEEE80211_TX_STAT_AMPDU
) {
1195 attempts
= info
->status
.ampdu_len
;
1196 success
= info
->status
.ampdu_ack_len
;
1198 attempts
= info
->status
.rates
[0].count
;
1199 success
= !!(info
->flags
& IEEE80211_TX_STAT_ACK
);
1202 lq_sta
->pers
.tx_stats
[column
][index
].total
+= attempts
;
1203 lq_sta
->pers
.tx_stats
[column
][index
].success
+= success
;
1205 IWL_DEBUG_RATE(mvm
, "Fixed rate 0x%x success %d attempts %d\n",
1206 tx_resp_hwrate
, success
, attempts
);
1211 if (time_after(jiffies
,
1212 (unsigned long)(lq_sta
->last_tx
+
1213 (IWL_MVM_RS_IDLE_TIMEOUT
* HZ
)))) {
1216 IWL_DEBUG_RATE(mvm
, "Tx idle for too long. reinit rs\n");
1217 for (t
= 0; t
< IWL_MAX_TID_COUNT
; t
++)
1218 ieee80211_stop_tx_ba_session(sta
, t
);
1220 iwl_mvm_rs_rate_init(mvm
, sta
, info
->band
, false);
1223 lq_sta
->last_tx
= jiffies
;
1225 /* Ignore this Tx frame response if its initial rate doesn't match
1226 * that of latest Link Quality command. There may be stragglers
1227 * from a previous Link Quality command, but we're no longer interested
1228 * in those; they're either from the "active" mode while we're trying
1229 * to check "search" mode, or a prior "search" mode after we've moved
1230 * to a new "search" mode (which might become the new "active" mode).
1232 table
= &lq_sta
->lq
;
1233 lq_hwrate
= le32_to_cpu(table
->rs_table
[0]);
1234 rs_rate_from_ucode_rate(lq_hwrate
, info
->band
, &lq_rate
);
1236 /* Here we actually compare this rate to the latest LQ command */
1237 if (lq_color
!= LQ_FLAG_COLOR_GET(table
->flags
)) {
1239 "tx resp color 0x%x does not match 0x%x\n",
1240 lq_color
, LQ_FLAG_COLOR_GET(table
->flags
));
1243 * Since rates mis-match, the last LQ command may have failed.
1244 * After IWL_MISSED_RATE_MAX mis-matches, resync the uCode with
1247 lq_sta
->missed_rate_counter
++;
1248 if (lq_sta
->missed_rate_counter
> IWL_MVM_RS_MISSED_RATE_MAX
) {
1249 lq_sta
->missed_rate_counter
= 0;
1251 "Too many rates mismatch. Send sync LQ. rs_state %d\n",
1253 iwl_mvm_send_lq_cmd(mvm
, &lq_sta
->lq
, false);
1255 /* Regardless, ignore this status info for outdated rate */
1258 /* Rate did match, so reset the missed_rate_counter */
1259 lq_sta
->missed_rate_counter
= 0;
1261 if (!lq_sta
->search_better_tbl
) {
1262 curr_tbl
= &(lq_sta
->lq_info
[lq_sta
->active_tbl
]);
1263 other_tbl
= &(lq_sta
->lq_info
[1 - lq_sta
->active_tbl
]);
1265 curr_tbl
= &(lq_sta
->lq_info
[1 - lq_sta
->active_tbl
]);
1266 other_tbl
= &(lq_sta
->lq_info
[lq_sta
->active_tbl
]);
1269 if (WARN_ON_ONCE(!rs_rate_column_match(&lq_rate
, &curr_tbl
->rate
))) {
1271 "Neither active nor search matches tx rate\n");
1272 tmp_tbl
= &(lq_sta
->lq_info
[lq_sta
->active_tbl
]);
1273 rs_dump_rate(mvm
, &tmp_tbl
->rate
, "ACTIVE");
1274 tmp_tbl
= &(lq_sta
->lq_info
[1 - lq_sta
->active_tbl
]);
1275 rs_dump_rate(mvm
, &tmp_tbl
->rate
, "SEARCH");
1276 rs_dump_rate(mvm
, &lq_rate
, "ACTUAL");
1279 * no matching table found, let's by-pass the data collection
1280 * and continue to perform rate scale to find the rate table
1282 rs_stay_in_table(lq_sta
, true);
1287 * Updating the frame history depends on whether packets were
1290 * For aggregation, all packets were transmitted at the same rate, the
1291 * first index into rate scale table.
1293 if (info
->flags
& IEEE80211_TX_STAT_AMPDU
) {
1294 rs_collect_tpc_data(mvm
, lq_sta
, curr_tbl
, tx_resp_rate
.index
,
1295 info
->status
.ampdu_len
,
1296 info
->status
.ampdu_ack_len
,
1299 /* ampdu_ack_len = 0 marks no BA was received. For TLC, treat
1300 * it as a single frame loss as we don't want the success ratio
1301 * to dip too quickly because a BA wasn't received.
1302 * For TPC, there's no need for this optimisation since we want
1303 * to recover very quickly from a bad power reduction and,
1304 * therefore we'd like the success ratio to get an immediate hit
1305 * when failing to get a BA, so we'd switch back to a lower or
1306 * zero power reduction. When FW transmits agg with a rate
1307 * different from the initial rate, it will not use reduced txp
1308 * and will send BA notification twice (one empty with reduced
1309 * txp equal to the value from LQ and one with reduced txp 0).
1310 * We need to update counters for each txp level accordingly.
1312 if (info
->status
.ampdu_ack_len
== 0)
1313 info
->status
.ampdu_len
= 1;
1315 rs_collect_tlc_data(mvm
, lq_sta
, curr_tbl
, tx_resp_rate
.index
,
1316 info
->status
.ampdu_len
,
1317 info
->status
.ampdu_ack_len
);
1319 /* Update success/fail counts if not searching for new mode */
1320 if (lq_sta
->rs_state
== RS_STATE_STAY_IN_COLUMN
) {
1321 lq_sta
->total_success
+= info
->status
.ampdu_ack_len
;
1322 lq_sta
->total_failed
+= (info
->status
.ampdu_len
-
1323 info
->status
.ampdu_ack_len
);
1326 /* For legacy, update frame history with for each Tx retry. */
1327 retries
= info
->status
.rates
[0].count
- 1;
1328 /* HW doesn't send more than 15 retries */
1329 retries
= min(retries
, 15);
1331 /* The last transmission may have been successful */
1332 legacy_success
= !!(info
->flags
& IEEE80211_TX_STAT_ACK
);
1333 /* Collect data for each rate used during failed TX attempts */
1334 for (i
= 0; i
<= retries
; ++i
) {
1335 lq_hwrate
= le32_to_cpu(table
->rs_table
[i
]);
1336 rs_rate_from_ucode_rate(lq_hwrate
, info
->band
,
1339 * Only collect stats if retried rate is in the same RS
1340 * table as active/search.
1342 if (rs_rate_column_match(&lq_rate
, &curr_tbl
->rate
))
1344 else if (rs_rate_column_match(&lq_rate
,
1346 tmp_tbl
= other_tbl
;
1350 rs_collect_tpc_data(mvm
, lq_sta
, tmp_tbl
,
1351 tx_resp_rate
.index
, 1,
1352 i
< retries
? 0 : legacy_success
,
1354 rs_collect_tlc_data(mvm
, lq_sta
, tmp_tbl
,
1355 tx_resp_rate
.index
, 1,
1356 i
< retries
? 0 : legacy_success
);
1359 /* Update success/fail counts if not searching for new mode */
1360 if (lq_sta
->rs_state
== RS_STATE_STAY_IN_COLUMN
) {
1361 lq_sta
->total_success
+= legacy_success
;
1362 lq_sta
->total_failed
+= retries
+ (1 - legacy_success
);
1365 /* The last TX rate is cached in lq_sta; it's set in if/else above */
1366 lq_sta
->last_rate_n_flags
= lq_hwrate
;
1367 IWL_DEBUG_RATE(mvm
, "reduced txpower: %d\n", reduced_txp
);
1369 /* See if there's a better rate or modulation mode to try. */
1370 if (sta
->supp_rates
[info
->band
])
1371 rs_rate_scale_perform(mvm
, sta
, lq_sta
, tid
, ndp
);
1375 * mac80211 sends us Tx status
1377 static void rs_mac80211_tx_status(void *mvm_r
,
1378 struct ieee80211_supported_band
*sband
,
1379 struct ieee80211_sta
*sta
, void *priv_sta
,
1380 struct sk_buff
*skb
)
1382 struct ieee80211_hdr
*hdr
= (struct ieee80211_hdr
*)skb
->data
;
1383 struct iwl_op_mode
*op_mode
= (struct iwl_op_mode
*)mvm_r
;
1384 struct iwl_mvm
*mvm
= IWL_OP_MODE_GET_MVM(op_mode
);
1385 struct ieee80211_tx_info
*info
= IEEE80211_SKB_CB(skb
);
1387 if (!iwl_mvm_sta_from_mac80211(sta
)->vif
)
1390 if (!ieee80211_is_data(hdr
->frame_control
) ||
1391 info
->flags
& IEEE80211_TX_CTL_NO_ACK
)
1394 iwl_mvm_rs_tx_status(mvm
, sta
, rs_get_tid(hdr
), info
,
1395 ieee80211_is_qos_nullfunc(hdr
->frame_control
));
1399 * Begin a period of staying with a selected modulation mode.
1400 * Set "stay_in_tbl" flag to prevent any mode switches.
1401 * Set frame tx success limits according to legacy vs. high-throughput,
1402 * and reset overall (spanning all rates) tx success history statistics.
1403 * These control how long we stay using same modulation mode before
1404 * searching for a new mode.
1406 static void rs_set_stay_in_table(struct iwl_mvm
*mvm
, u8 is_legacy
,
1407 struct iwl_lq_sta
*lq_sta
)
1409 IWL_DEBUG_RATE(mvm
, "Moving to RS_STATE_STAY_IN_COLUMN\n");
1410 lq_sta
->rs_state
= RS_STATE_STAY_IN_COLUMN
;
1412 lq_sta
->table_count_limit
= IWL_MVM_RS_LEGACY_TABLE_COUNT
;
1413 lq_sta
->max_failure_limit
= IWL_MVM_RS_LEGACY_FAILURE_LIMIT
;
1414 lq_sta
->max_success_limit
= IWL_MVM_RS_LEGACY_SUCCESS_LIMIT
;
1416 lq_sta
->table_count_limit
= IWL_MVM_RS_NON_LEGACY_TABLE_COUNT
;
1417 lq_sta
->max_failure_limit
= IWL_MVM_RS_NON_LEGACY_FAILURE_LIMIT
;
1418 lq_sta
->max_success_limit
= IWL_MVM_RS_NON_LEGACY_SUCCESS_LIMIT
;
1420 lq_sta
->table_count
= 0;
1421 lq_sta
->total_failed
= 0;
1422 lq_sta
->total_success
= 0;
1423 lq_sta
->flush_timer
= jiffies
;
1424 lq_sta
->visited_columns
= 0;
1427 static inline int rs_get_max_rate_from_mask(unsigned long rate_mask
)
1430 return find_last_bit(&rate_mask
, BITS_PER_LONG
);
1431 return IWL_RATE_INVALID
;
1434 static int rs_get_max_allowed_rate(struct iwl_lq_sta
*lq_sta
,
1435 const struct rs_tx_column
*column
)
1437 switch (column
->mode
) {
1439 return lq_sta
->max_legacy_rate_idx
;
1441 return lq_sta
->max_siso_rate_idx
;
1443 return lq_sta
->max_mimo2_rate_idx
;
1448 return lq_sta
->max_legacy_rate_idx
;
1451 static const u16
*rs_get_expected_tpt_table(struct iwl_lq_sta
*lq_sta
,
1452 const struct rs_tx_column
*column
,
1455 /* Used to choose among HT tables */
1456 const u16 (*ht_tbl_pointer
)[IWL_RATE_COUNT
];
1458 if (WARN_ON_ONCE(column
->mode
!= RS_LEGACY
&&
1459 column
->mode
!= RS_SISO
&&
1460 column
->mode
!= RS_MIMO2
))
1461 return expected_tpt_legacy
;
1463 /* Legacy rates have only one table */
1464 if (column
->mode
== RS_LEGACY
)
1465 return expected_tpt_legacy
;
1467 ht_tbl_pointer
= expected_tpt_mimo2_20MHz
;
1468 /* Choose among many HT tables depending on number of streams
1469 * (SISO/MIMO2), channel width (20/40/80), SGI, and aggregation
1471 if (column
->mode
== RS_SISO
) {
1473 case RATE_MCS_CHAN_WIDTH_20
:
1474 ht_tbl_pointer
= expected_tpt_siso_20MHz
;
1476 case RATE_MCS_CHAN_WIDTH_40
:
1477 ht_tbl_pointer
= expected_tpt_siso_40MHz
;
1479 case RATE_MCS_CHAN_WIDTH_80
:
1480 ht_tbl_pointer
= expected_tpt_siso_80MHz
;
1482 case RATE_MCS_CHAN_WIDTH_160
:
1483 ht_tbl_pointer
= expected_tpt_siso_160MHz
;
1488 } else if (column
->mode
== RS_MIMO2
) {
1490 case RATE_MCS_CHAN_WIDTH_20
:
1491 ht_tbl_pointer
= expected_tpt_mimo2_20MHz
;
1493 case RATE_MCS_CHAN_WIDTH_40
:
1494 ht_tbl_pointer
= expected_tpt_mimo2_40MHz
;
1496 case RATE_MCS_CHAN_WIDTH_80
:
1497 ht_tbl_pointer
= expected_tpt_mimo2_80MHz
;
1499 case RATE_MCS_CHAN_WIDTH_160
:
1500 ht_tbl_pointer
= expected_tpt_mimo2_160MHz
;
1509 if (!column
->sgi
&& !lq_sta
->is_agg
) /* Normal */
1510 return ht_tbl_pointer
[0];
1511 else if (column
->sgi
&& !lq_sta
->is_agg
) /* SGI */
1512 return ht_tbl_pointer
[1];
1513 else if (!column
->sgi
&& lq_sta
->is_agg
) /* AGG */
1514 return ht_tbl_pointer
[2];
1516 return ht_tbl_pointer
[3];
1519 static void rs_set_expected_tpt_table(struct iwl_lq_sta
*lq_sta
,
1520 struct iwl_scale_tbl_info
*tbl
)
1522 struct rs_rate
*rate
= &tbl
->rate
;
1523 const struct rs_tx_column
*column
= &rs_tx_columns
[tbl
->column
];
1525 tbl
->expected_tpt
= rs_get_expected_tpt_table(lq_sta
, column
, rate
->bw
);
1528 static s32
rs_get_best_rate(struct iwl_mvm
*mvm
,
1529 struct iwl_lq_sta
*lq_sta
,
1530 struct iwl_scale_tbl_info
*tbl
, /* "search" */
1531 unsigned long rate_mask
, s8 index
)
1533 struct iwl_scale_tbl_info
*active_tbl
=
1534 &(lq_sta
->lq_info
[lq_sta
->active_tbl
]);
1535 s32 success_ratio
= active_tbl
->win
[index
].success_ratio
;
1536 u16 expected_current_tpt
= active_tbl
->expected_tpt
[index
];
1537 const u16
*tpt_tbl
= tbl
->expected_tpt
;
1542 if (success_ratio
>= RS_PERCENT(IWL_MVM_RS_SR_NO_DECREASE
)) {
1543 target_tpt
= 100 * expected_current_tpt
;
1545 "SR %d high. Find rate exceeding EXPECTED_CURRENT %d\n",
1546 success_ratio
, target_tpt
);
1548 target_tpt
= lq_sta
->last_tpt
;
1550 "SR %d not that good. Find rate exceeding ACTUAL_TPT %d\n",
1551 success_ratio
, target_tpt
);
1554 rate_idx
= find_first_bit(&rate_mask
, BITS_PER_LONG
);
1556 while (rate_idx
!= IWL_RATE_INVALID
) {
1557 if (target_tpt
< (100 * tpt_tbl
[rate_idx
]))
1560 high_low
= rs_get_adjacent_rate(mvm
, rate_idx
, rate_mask
,
1563 rate_idx
= (high_low
>> 8) & 0xff;
1566 IWL_DEBUG_RATE(mvm
, "Best rate found %d target_tp %d expected_new %d\n",
1567 rate_idx
, target_tpt
,
1568 rate_idx
!= IWL_RATE_INVALID
?
1569 100 * tpt_tbl
[rate_idx
] : IWL_INVALID_VALUE
);
1574 static u32
rs_bw_from_sta_bw(struct ieee80211_sta
*sta
)
1576 switch (sta
->bandwidth
) {
1577 case IEEE80211_STA_RX_BW_160
:
1578 return RATE_MCS_CHAN_WIDTH_160
;
1579 case IEEE80211_STA_RX_BW_80
:
1580 return RATE_MCS_CHAN_WIDTH_80
;
1581 case IEEE80211_STA_RX_BW_40
:
1582 return RATE_MCS_CHAN_WIDTH_40
;
1583 case IEEE80211_STA_RX_BW_20
:
1585 return RATE_MCS_CHAN_WIDTH_20
;
1590 * Check whether we should continue using same modulation mode, or
1591 * begin search for a new mode, based on:
1592 * 1) # tx successes or failures while using this mode
1593 * 2) # times calling this function
1594 * 3) elapsed time in this mode (not used, for now)
1596 static void rs_stay_in_table(struct iwl_lq_sta
*lq_sta
, bool force_search
)
1598 struct iwl_scale_tbl_info
*tbl
;
1600 int flush_interval_passed
= 0;
1601 struct iwl_mvm
*mvm
;
1603 mvm
= lq_sta
->pers
.drv
;
1604 active_tbl
= lq_sta
->active_tbl
;
1606 tbl
= &(lq_sta
->lq_info
[active_tbl
]);
1608 /* If we've been disallowing search, see if we should now allow it */
1609 if (lq_sta
->rs_state
== RS_STATE_STAY_IN_COLUMN
) {
1610 /* Elapsed time using current modulation mode */
1611 if (lq_sta
->flush_timer
)
1612 flush_interval_passed
=
1614 (unsigned long)(lq_sta
->flush_timer
+
1615 (IWL_MVM_RS_STAY_IN_COLUMN_TIMEOUT
* HZ
)));
1618 * Check if we should allow search for new modulation mode.
1619 * If many frames have failed or succeeded, or we've used
1620 * this same modulation for a long time, allow search, and
1621 * reset history stats that keep track of whether we should
1622 * allow a new search. Also (below) reset all bitmaps and
1623 * stats in active history.
1626 (lq_sta
->total_failed
> lq_sta
->max_failure_limit
) ||
1627 (lq_sta
->total_success
> lq_sta
->max_success_limit
) ||
1628 ((!lq_sta
->search_better_tbl
) &&
1629 (lq_sta
->flush_timer
) && (flush_interval_passed
))) {
1631 "LQ: stay is expired %d %d %d\n",
1632 lq_sta
->total_failed
,
1633 lq_sta
->total_success
,
1634 flush_interval_passed
);
1636 /* Allow search for new mode */
1637 lq_sta
->rs_state
= RS_STATE_SEARCH_CYCLE_STARTED
;
1639 "Moving to RS_STATE_SEARCH_CYCLE_STARTED\n");
1640 lq_sta
->total_failed
= 0;
1641 lq_sta
->total_success
= 0;
1642 lq_sta
->flush_timer
= 0;
1643 /* mark the current column as visited */
1644 lq_sta
->visited_columns
= BIT(tbl
->column
);
1646 * Else if we've used this modulation mode enough repetitions
1647 * (regardless of elapsed time or success/failure), reset
1648 * history bitmaps and rate-specific stats for all rates in
1652 lq_sta
->table_count
++;
1653 if (lq_sta
->table_count
>=
1654 lq_sta
->table_count_limit
) {
1655 lq_sta
->table_count
= 0;
1658 "LQ: stay in table clear win\n");
1659 rs_rate_scale_clear_tbl_windows(mvm
, tbl
);
1663 /* If transitioning to allow "search", reset all history
1664 * bitmaps and stats in active table (this will become the new
1665 * "search" table). */
1666 if (lq_sta
->rs_state
== RS_STATE_SEARCH_CYCLE_STARTED
) {
1667 rs_rate_scale_clear_tbl_windows(mvm
, tbl
);
1672 static void rs_set_amsdu_len(struct iwl_mvm
*mvm
, struct ieee80211_sta
*sta
,
1673 struct iwl_scale_tbl_info
*tbl
,
1674 enum rs_action scale_action
)
1676 struct iwl_mvm_sta
*sta_priv
= iwl_mvm_sta_from_mac80211(sta
);
1678 if ((!is_vht(&tbl
->rate
) && !is_ht(&tbl
->rate
)) ||
1679 tbl
->rate
.index
< IWL_RATE_MCS_5_INDEX
||
1680 scale_action
== RS_ACTION_DOWNSCALE
)
1681 sta_priv
->tlc_amsdu
= false;
1683 sta_priv
->tlc_amsdu
= true;
1687 * setup rate table in uCode
1689 static void rs_update_rate_tbl(struct iwl_mvm
*mvm
,
1690 struct ieee80211_sta
*sta
,
1691 struct iwl_lq_sta
*lq_sta
,
1692 struct iwl_scale_tbl_info
*tbl
)
1694 rs_fill_lq_cmd(mvm
, sta
, lq_sta
, &tbl
->rate
);
1695 iwl_mvm_send_lq_cmd(mvm
, &lq_sta
->lq
, false);
1698 static bool rs_tweak_rate_tbl(struct iwl_mvm
*mvm
,
1699 struct ieee80211_sta
*sta
,
1700 struct iwl_lq_sta
*lq_sta
,
1701 struct iwl_scale_tbl_info
*tbl
,
1702 enum rs_action scale_action
)
1704 if (sta
->bandwidth
!= IEEE80211_STA_RX_BW_80
)
1707 if (!is_vht_siso(&tbl
->rate
))
1710 if ((tbl
->rate
.bw
== RATE_MCS_CHAN_WIDTH_80
) &&
1711 (tbl
->rate
.index
== IWL_RATE_MCS_0_INDEX
) &&
1712 (scale_action
== RS_ACTION_DOWNSCALE
)) {
1713 tbl
->rate
.bw
= RATE_MCS_CHAN_WIDTH_20
;
1714 tbl
->rate
.index
= IWL_RATE_MCS_4_INDEX
;
1715 IWL_DEBUG_RATE(mvm
, "Switch 80Mhz SISO MCS0 -> 20Mhz MCS4\n");
1719 /* Go back to 80Mhz MCS1 only if we've established that 20Mhz MCS5 is
1720 * sustainable, i.e. we're past the test window. We can't go back
1721 * if MCS5 is just tested as this will happen always after switching
1722 * to 20Mhz MCS4 because the rate stats are cleared.
1724 if ((tbl
->rate
.bw
== RATE_MCS_CHAN_WIDTH_20
) &&
1725 (((tbl
->rate
.index
== IWL_RATE_MCS_5_INDEX
) &&
1726 (scale_action
== RS_ACTION_STAY
)) ||
1727 ((tbl
->rate
.index
> IWL_RATE_MCS_5_INDEX
) &&
1728 (scale_action
== RS_ACTION_UPSCALE
)))) {
1729 tbl
->rate
.bw
= RATE_MCS_CHAN_WIDTH_80
;
1730 tbl
->rate
.index
= IWL_RATE_MCS_1_INDEX
;
1731 IWL_DEBUG_RATE(mvm
, "Switch 20Mhz SISO MCS5 -> 80Mhz MCS1\n");
1738 rs_set_expected_tpt_table(lq_sta
, tbl
);
1739 rs_rate_scale_clear_tbl_windows(mvm
, tbl
);
1743 static enum rs_column
rs_get_next_column(struct iwl_mvm
*mvm
,
1744 struct iwl_lq_sta
*lq_sta
,
1745 struct ieee80211_sta
*sta
,
1746 struct iwl_scale_tbl_info
*tbl
)
1749 enum rs_column next_col_id
;
1750 const struct rs_tx_column
*curr_col
= &rs_tx_columns
[tbl
->column
];
1751 const struct rs_tx_column
*next_col
;
1752 allow_column_func_t allow_func
;
1753 u8 valid_ants
= iwl_mvm_get_valid_tx_ant(mvm
);
1754 const u16
*expected_tpt_tbl
;
1755 u16 tpt
, max_expected_tpt
;
1757 for (i
= 0; i
< MAX_NEXT_COLUMNS
; i
++) {
1758 next_col_id
= curr_col
->next_columns
[i
];
1760 if (next_col_id
== RS_COLUMN_INVALID
)
1763 if (lq_sta
->visited_columns
& BIT(next_col_id
)) {
1764 IWL_DEBUG_RATE(mvm
, "Skip already visited column %d\n",
1769 next_col
= &rs_tx_columns
[next_col_id
];
1771 if (!rs_is_valid_ant(valid_ants
, next_col
->ant
)) {
1773 "Skip column %d as ANT config isn't supported by chip. valid_ants 0x%x column ant 0x%x\n",
1774 next_col_id
, valid_ants
, next_col
->ant
);
1778 for (j
= 0; j
< MAX_COLUMN_CHECKS
; j
++) {
1779 allow_func
= next_col
->checks
[j
];
1780 if (allow_func
&& !allow_func(mvm
, sta
, &tbl
->rate
,
1785 if (j
!= MAX_COLUMN_CHECKS
) {
1787 "Skip column %d: not allowed (check %d failed)\n",
1793 tpt
= lq_sta
->last_tpt
/ 100;
1794 expected_tpt_tbl
= rs_get_expected_tpt_table(lq_sta
, next_col
,
1795 rs_bw_from_sta_bw(sta
));
1796 if (WARN_ON_ONCE(!expected_tpt_tbl
))
1799 max_rate
= rs_get_max_allowed_rate(lq_sta
, next_col
);
1800 if (max_rate
== IWL_RATE_INVALID
) {
1802 "Skip column %d: no rate is allowed in this column\n",
1807 max_expected_tpt
= expected_tpt_tbl
[max_rate
];
1808 if (tpt
>= max_expected_tpt
) {
1810 "Skip column %d: can't beat current TPT. Max expected %d current %d\n",
1811 next_col_id
, max_expected_tpt
, tpt
);
1816 "Found potential column %d. Max expected %d current %d\n",
1817 next_col_id
, max_expected_tpt
, tpt
);
1821 if (i
== MAX_NEXT_COLUMNS
)
1822 return RS_COLUMN_INVALID
;
1827 static int rs_switch_to_column(struct iwl_mvm
*mvm
,
1828 struct iwl_lq_sta
*lq_sta
,
1829 struct ieee80211_sta
*sta
,
1830 enum rs_column col_id
)
1832 struct iwl_scale_tbl_info
*tbl
= &(lq_sta
->lq_info
[lq_sta
->active_tbl
]);
1833 struct iwl_scale_tbl_info
*search_tbl
=
1834 &(lq_sta
->lq_info
[(1 - lq_sta
->active_tbl
)]);
1835 struct rs_rate
*rate
= &search_tbl
->rate
;
1836 const struct rs_tx_column
*column
= &rs_tx_columns
[col_id
];
1837 const struct rs_tx_column
*curr_column
= &rs_tx_columns
[tbl
->column
];
1838 u32 sz
= (sizeof(struct iwl_scale_tbl_info
) -
1839 (sizeof(struct iwl_rate_scale_data
) * IWL_RATE_COUNT
));
1840 unsigned long rate_mask
= 0;
1843 memcpy(search_tbl
, tbl
, sz
);
1845 rate
->sgi
= column
->sgi
;
1846 rate
->ant
= column
->ant
;
1848 if (column
->mode
== RS_LEGACY
) {
1849 if (lq_sta
->band
== NL80211_BAND_5GHZ
)
1850 rate
->type
= LQ_LEGACY_A
;
1852 rate
->type
= LQ_LEGACY_G
;
1854 rate
->bw
= RATE_MCS_CHAN_WIDTH_20
;
1856 rate_mask
= lq_sta
->active_legacy_rate
;
1857 } else if (column
->mode
== RS_SISO
) {
1858 rate
->type
= lq_sta
->is_vht
? LQ_VHT_SISO
: LQ_HT_SISO
;
1859 rate_mask
= lq_sta
->active_siso_rate
;
1860 } else if (column
->mode
== RS_MIMO2
) {
1861 rate
->type
= lq_sta
->is_vht
? LQ_VHT_MIMO2
: LQ_HT_MIMO2
;
1862 rate_mask
= lq_sta
->active_mimo2_rate
;
1864 WARN_ONCE(1, "Bad column mode");
1867 if (column
->mode
!= RS_LEGACY
) {
1868 rate
->bw
= rs_bw_from_sta_bw(sta
);
1869 rate
->ldpc
= lq_sta
->ldpc
;
1872 search_tbl
->column
= col_id
;
1873 rs_set_expected_tpt_table(lq_sta
, search_tbl
);
1875 lq_sta
->visited_columns
|= BIT(col_id
);
1877 /* Get the best matching rate if we're changing modes. e.g.
1878 * SISO->MIMO, LEGACY->SISO, MIMO->SISO
1880 if (curr_column
->mode
!= column
->mode
) {
1881 rate_idx
= rs_get_best_rate(mvm
, lq_sta
, search_tbl
,
1882 rate_mask
, rate
->index
);
1884 if ((rate_idx
== IWL_RATE_INVALID
) ||
1885 !(BIT(rate_idx
) & rate_mask
)) {
1887 "can not switch with index %d"
1889 rate_idx
, rate_mask
);
1894 rate
->index
= rate_idx
;
1897 IWL_DEBUG_RATE(mvm
, "Switched to column %d: Index %d\n",
1898 col_id
, rate
->index
);
1903 rate
->type
= LQ_NONE
;
1907 static enum rs_action
rs_get_rate_action(struct iwl_mvm
*mvm
,
1908 struct iwl_scale_tbl_info
*tbl
,
1909 s32 sr
, int low
, int high
,
1911 int low_tpt
, int high_tpt
)
1913 enum rs_action action
= RS_ACTION_STAY
;
1915 if ((sr
<= RS_PERCENT(IWL_MVM_RS_SR_FORCE_DECREASE
)) ||
1916 (current_tpt
== 0)) {
1918 "Decrease rate because of low SR\n");
1919 return RS_ACTION_DOWNSCALE
;
1922 if ((low_tpt
== IWL_INVALID_VALUE
) &&
1923 (high_tpt
== IWL_INVALID_VALUE
) &&
1924 (high
!= IWL_RATE_INVALID
)) {
1926 "No data about high/low rates. Increase rate\n");
1927 return RS_ACTION_UPSCALE
;
1930 if ((high_tpt
== IWL_INVALID_VALUE
) &&
1931 (high
!= IWL_RATE_INVALID
) &&
1932 (low_tpt
!= IWL_INVALID_VALUE
) &&
1933 (low_tpt
< current_tpt
)) {
1935 "No data about high rate and low rate is worse. Increase rate\n");
1936 return RS_ACTION_UPSCALE
;
1939 if ((high_tpt
!= IWL_INVALID_VALUE
) &&
1940 (high_tpt
> current_tpt
)) {
1942 "Higher rate is better. Increate rate\n");
1943 return RS_ACTION_UPSCALE
;
1946 if ((low_tpt
!= IWL_INVALID_VALUE
) &&
1947 (high_tpt
!= IWL_INVALID_VALUE
) &&
1948 (low_tpt
< current_tpt
) &&
1949 (high_tpt
< current_tpt
)) {
1951 "Both high and low are worse. Maintain rate\n");
1952 return RS_ACTION_STAY
;
1955 if ((low_tpt
!= IWL_INVALID_VALUE
) &&
1956 (low_tpt
> current_tpt
)) {
1958 "Lower rate is better\n");
1959 action
= RS_ACTION_DOWNSCALE
;
1963 if ((low_tpt
== IWL_INVALID_VALUE
) &&
1964 (low
!= IWL_RATE_INVALID
)) {
1966 "No data about lower rate\n");
1967 action
= RS_ACTION_DOWNSCALE
;
1971 IWL_DEBUG_RATE(mvm
, "Maintain rate\n");
1974 if ((action
== RS_ACTION_DOWNSCALE
) && (low
!= IWL_RATE_INVALID
)) {
1975 if (sr
>= RS_PERCENT(IWL_MVM_RS_SR_NO_DECREASE
)) {
1977 "SR is above NO DECREASE. Avoid downscale\n");
1978 action
= RS_ACTION_STAY
;
1979 } else if (current_tpt
> (100 * tbl
->expected_tpt
[low
])) {
1981 "Current TPT is higher than max expected in low rate. Avoid downscale\n");
1982 action
= RS_ACTION_STAY
;
1984 IWL_DEBUG_RATE(mvm
, "Decrease rate\n");
1991 static bool rs_stbc_allow(struct iwl_mvm
*mvm
, struct ieee80211_sta
*sta
,
1992 struct iwl_lq_sta
*lq_sta
)
1994 /* Our chip supports Tx STBC and the peer is an HT/VHT STA which
1995 * supports STBC of at least 1*SS
1997 if (!lq_sta
->stbc_capable
)
2000 if (!iwl_mvm_bt_coex_is_mimo_allowed(mvm
, sta
))
2006 static void rs_get_adjacent_txp(struct iwl_mvm
*mvm
, int index
,
2007 int *weaker
, int *stronger
)
2009 *weaker
= index
+ IWL_MVM_RS_TPC_TX_POWER_STEP
;
2010 if (*weaker
> TPC_MAX_REDUCTION
)
2011 *weaker
= TPC_INVALID
;
2013 *stronger
= index
- IWL_MVM_RS_TPC_TX_POWER_STEP
;
2015 *stronger
= TPC_INVALID
;
2018 static bool rs_tpc_allowed(struct iwl_mvm
*mvm
, struct ieee80211_vif
*vif
,
2019 struct rs_rate
*rate
, enum nl80211_band band
)
2021 int index
= rate
->index
;
2022 bool cam
= (iwlmvm_mod_params
.power_scheme
== IWL_POWER_SCHEME_CAM
);
2023 bool sta_ps_disabled
= (vif
->type
== NL80211_IFTYPE_STATION
&&
2026 IWL_DEBUG_RATE(mvm
, "cam: %d sta_ps_disabled %d\n",
2027 cam
, sta_ps_disabled
);
2029 * allow tpc only if power management is enabled, or bt coex
2030 * activity grade allows it and we are on 2.4Ghz.
2032 if ((cam
|| sta_ps_disabled
) &&
2033 !iwl_mvm_bt_coex_is_tpc_allowed(mvm
, band
))
2036 IWL_DEBUG_RATE(mvm
, "check rate, table type: %d\n", rate
->type
);
2037 if (is_legacy(rate
))
2038 return index
== IWL_RATE_54M_INDEX
;
2040 return index
== IWL_RATE_MCS_7_INDEX
;
2042 return index
== IWL_RATE_MCS_7_INDEX
||
2043 index
== IWL_RATE_MCS_8_INDEX
||
2044 index
== IWL_RATE_MCS_9_INDEX
;
2052 TPC_ACTION_DECREASE
,
2053 TPC_ACTION_INCREASE
,
2054 TPC_ACTION_NO_RESTIRCTION
,
2057 static enum tpc_action
rs_get_tpc_action(struct iwl_mvm
*mvm
,
2058 s32 sr
, int weak
, int strong
,
2060 int weak_tpt
, int strong_tpt
)
2062 /* stay until we have valid tpt */
2063 if (current_tpt
== IWL_INVALID_VALUE
) {
2064 IWL_DEBUG_RATE(mvm
, "no current tpt. stay.\n");
2065 return TPC_ACTION_STAY
;
2068 /* Too many failures, increase txp */
2069 if (sr
<= RS_PERCENT(IWL_MVM_RS_TPC_SR_FORCE_INCREASE
) ||
2071 IWL_DEBUG_RATE(mvm
, "increase txp because of weak SR\n");
2072 return TPC_ACTION_NO_RESTIRCTION
;
2075 /* try decreasing first if applicable */
2076 if (sr
>= RS_PERCENT(IWL_MVM_RS_TPC_SR_NO_INCREASE
) &&
2077 weak
!= TPC_INVALID
) {
2078 if (weak_tpt
== IWL_INVALID_VALUE
&&
2079 (strong_tpt
== IWL_INVALID_VALUE
||
2080 current_tpt
>= strong_tpt
)) {
2082 "no weak txp measurement. decrease txp\n");
2083 return TPC_ACTION_DECREASE
;
2086 if (weak_tpt
> current_tpt
) {
2088 "lower txp has better tpt. decrease txp\n");
2089 return TPC_ACTION_DECREASE
;
2093 /* next, increase if needed */
2094 if (sr
< RS_PERCENT(IWL_MVM_RS_TPC_SR_NO_INCREASE
) &&
2095 strong
!= TPC_INVALID
) {
2096 if (weak_tpt
== IWL_INVALID_VALUE
&&
2097 strong_tpt
!= IWL_INVALID_VALUE
&&
2098 current_tpt
< strong_tpt
) {
2100 "higher txp has better tpt. increase txp\n");
2101 return TPC_ACTION_INCREASE
;
2104 if (weak_tpt
< current_tpt
&&
2105 (strong_tpt
== IWL_INVALID_VALUE
||
2106 strong_tpt
> current_tpt
)) {
2108 "lower txp has worse tpt. increase txp\n");
2109 return TPC_ACTION_INCREASE
;
2113 IWL_DEBUG_RATE(mvm
, "no need to increase or decrease txp - stay\n");
2114 return TPC_ACTION_STAY
;
2117 static bool rs_tpc_perform(struct iwl_mvm
*mvm
,
2118 struct ieee80211_sta
*sta
,
2119 struct iwl_lq_sta
*lq_sta
,
2120 struct iwl_scale_tbl_info
*tbl
)
2122 struct iwl_mvm_sta
*mvm_sta
= iwl_mvm_sta_from_mac80211(sta
);
2123 struct ieee80211_vif
*vif
= mvm_sta
->vif
;
2124 struct ieee80211_chanctx_conf
*chanctx_conf
;
2125 enum nl80211_band band
;
2126 struct iwl_rate_scale_data
*window
;
2127 struct rs_rate
*rate
= &tbl
->rate
;
2128 enum tpc_action action
;
2130 u8 cur
= lq_sta
->lq
.reduced_tpc
;
2133 int weak_tpt
= IWL_INVALID_VALUE
, strong_tpt
= IWL_INVALID_VALUE
;
2135 #ifdef CONFIG_MAC80211_DEBUGFS
2136 if (lq_sta
->pers
.dbg_fixed_txp_reduction
<= TPC_MAX_REDUCTION
) {
2137 IWL_DEBUG_RATE(mvm
, "fixed tpc: %d\n",
2138 lq_sta
->pers
.dbg_fixed_txp_reduction
);
2139 lq_sta
->lq
.reduced_tpc
= lq_sta
->pers
.dbg_fixed_txp_reduction
;
2140 return cur
!= lq_sta
->pers
.dbg_fixed_txp_reduction
;
2145 chanctx_conf
= rcu_dereference(vif
->chanctx_conf
);
2146 if (WARN_ON(!chanctx_conf
))
2147 band
= NUM_NL80211_BANDS
;
2149 band
= chanctx_conf
->def
.chan
->band
;
2152 if (!rs_tpc_allowed(mvm
, vif
, rate
, band
)) {
2154 "tpc is not allowed. remove txp restrictions\n");
2155 lq_sta
->lq
.reduced_tpc
= TPC_NO_REDUCTION
;
2156 return cur
!= TPC_NO_REDUCTION
;
2159 rs_get_adjacent_txp(mvm
, cur
, &weak
, &strong
);
2161 /* Collect measured throughputs for current and adjacent rates */
2162 window
= tbl
->tpc_win
;
2163 sr
= window
[cur
].success_ratio
;
2164 current_tpt
= window
[cur
].average_tpt
;
2165 if (weak
!= TPC_INVALID
)
2166 weak_tpt
= window
[weak
].average_tpt
;
2167 if (strong
!= TPC_INVALID
)
2168 strong_tpt
= window
[strong
].average_tpt
;
2171 "(TPC: %d): cur_tpt %d SR %d weak %d strong %d weak_tpt %d strong_tpt %d\n",
2172 cur
, current_tpt
, sr
, weak
, strong
,
2173 weak_tpt
, strong_tpt
);
2175 action
= rs_get_tpc_action(mvm
, sr
, weak
, strong
,
2176 current_tpt
, weak_tpt
, strong_tpt
);
2178 /* override actions if we are on the edge */
2179 if (weak
== TPC_INVALID
&& action
== TPC_ACTION_DECREASE
) {
2180 IWL_DEBUG_RATE(mvm
, "already in lowest txp, stay\n");
2181 action
= TPC_ACTION_STAY
;
2182 } else if (strong
== TPC_INVALID
&&
2183 (action
== TPC_ACTION_INCREASE
||
2184 action
== TPC_ACTION_NO_RESTIRCTION
)) {
2185 IWL_DEBUG_RATE(mvm
, "already in highest txp, stay\n");
2186 action
= TPC_ACTION_STAY
;
2190 case TPC_ACTION_DECREASE
:
2191 lq_sta
->lq
.reduced_tpc
= weak
;
2193 case TPC_ACTION_INCREASE
:
2194 lq_sta
->lq
.reduced_tpc
= strong
;
2196 case TPC_ACTION_NO_RESTIRCTION
:
2197 lq_sta
->lq
.reduced_tpc
= TPC_NO_REDUCTION
;
2199 case TPC_ACTION_STAY
:
2207 * Do rate scaling and search for new modulation mode.
2209 static void rs_rate_scale_perform(struct iwl_mvm
*mvm
,
2210 struct ieee80211_sta
*sta
,
2211 struct iwl_lq_sta
*lq_sta
,
2214 int low
= IWL_RATE_INVALID
;
2215 int high
= IWL_RATE_INVALID
;
2217 struct iwl_rate_scale_data
*window
= NULL
;
2218 int current_tpt
= IWL_INVALID_VALUE
;
2219 int low_tpt
= IWL_INVALID_VALUE
;
2220 int high_tpt
= IWL_INVALID_VALUE
;
2222 enum rs_action scale_action
= RS_ACTION_STAY
;
2225 struct iwl_scale_tbl_info
*tbl
, *tbl1
;
2230 u8 prev_agg
= lq_sta
->is_agg
;
2231 struct iwl_mvm_sta
*sta_priv
= iwl_mvm_sta_from_mac80211(sta
);
2232 struct iwl_mvm_tid_data
*tid_data
;
2233 struct rs_rate
*rate
;
2235 lq_sta
->is_agg
= !!sta_priv
->agg_tids
;
2238 * Select rate-scale / modulation-mode table to work with in
2239 * the rest of this function: "search" if searching for better
2240 * modulation mode, or "active" if doing rate scaling within a mode.
2242 if (!lq_sta
->search_better_tbl
)
2243 active_tbl
= lq_sta
->active_tbl
;
2245 active_tbl
= 1 - lq_sta
->active_tbl
;
2247 tbl
= &(lq_sta
->lq_info
[active_tbl
]);
2250 if (prev_agg
!= lq_sta
->is_agg
) {
2252 "Aggregation changed: prev %d current %d. Update expected TPT table\n",
2253 prev_agg
, lq_sta
->is_agg
);
2254 rs_set_expected_tpt_table(lq_sta
, tbl
);
2255 rs_rate_scale_clear_tbl_windows(mvm
, tbl
);
2258 /* current tx rate */
2259 index
= rate
->index
;
2261 /* rates available for this association, and for modulation mode */
2262 rate_mask
= rs_get_supported_rates(lq_sta
, rate
);
2264 if (!(BIT(index
) & rate_mask
)) {
2265 IWL_ERR(mvm
, "Current Rate is not valid\n");
2266 if (lq_sta
->search_better_tbl
) {
2267 /* revert to active table if search table is not valid*/
2268 rate
->type
= LQ_NONE
;
2269 lq_sta
->search_better_tbl
= 0;
2270 tbl
= &(lq_sta
->lq_info
[lq_sta
->active_tbl
]);
2271 rs_update_rate_tbl(mvm
, sta
, lq_sta
, tbl
);
2276 /* Get expected throughput table and history window for current rate */
2277 if (!tbl
->expected_tpt
) {
2278 IWL_ERR(mvm
, "tbl->expected_tpt is NULL\n");
2282 /* TODO: handle rate_idx_mask and rate_idx_mcs_mask */
2283 window
= &(tbl
->win
[index
]);
2286 * If there is not enough history to calculate actual average
2287 * throughput, keep analyzing results of more tx frames, without
2288 * changing rate or mode (bypass most of the rest of this function).
2289 * Set up new rate table in uCode only if old rate is not supported
2290 * in current association (use new rate found above).
2292 fail_count
= window
->counter
- window
->success_counter
;
2293 if ((fail_count
< IWL_MVM_RS_RATE_MIN_FAILURE_TH
) &&
2294 (window
->success_counter
< IWL_MVM_RS_RATE_MIN_SUCCESS_TH
)) {
2296 "%s: Test Window: succ %d total %d\n",
2297 rs_pretty_rate(rate
),
2298 window
->success_counter
, window
->counter
);
2300 /* Can't calculate this yet; not enough history */
2301 window
->average_tpt
= IWL_INVALID_VALUE
;
2303 /* Should we stay with this modulation mode,
2304 * or search for a new one? */
2305 rs_stay_in_table(lq_sta
, false);
2310 /* If we are searching for better modulation mode, check success. */
2311 if (lq_sta
->search_better_tbl
) {
2312 /* If good success, continue using the "search" mode;
2313 * no need to send new link quality command, since we're
2314 * continuing to use the setup that we've been trying. */
2315 if (window
->average_tpt
> lq_sta
->last_tpt
) {
2317 "SWITCHING TO NEW TABLE SR: %d "
2318 "cur-tpt %d old-tpt %d\n",
2319 window
->success_ratio
,
2320 window
->average_tpt
,
2323 /* Swap tables; "search" becomes "active" */
2324 lq_sta
->active_tbl
= active_tbl
;
2325 current_tpt
= window
->average_tpt
;
2326 /* Else poor success; go back to mode in "active" table */
2329 "GOING BACK TO THE OLD TABLE: SR %d "
2330 "cur-tpt %d old-tpt %d\n",
2331 window
->success_ratio
,
2332 window
->average_tpt
,
2335 /* Nullify "search" table */
2336 rate
->type
= LQ_NONE
;
2338 /* Revert to "active" table */
2339 active_tbl
= lq_sta
->active_tbl
;
2340 tbl
= &(lq_sta
->lq_info
[active_tbl
]);
2342 /* Revert to "active" rate and throughput info */
2343 index
= tbl
->rate
.index
;
2344 current_tpt
= lq_sta
->last_tpt
;
2346 /* Need to set up a new rate table in uCode */
2350 /* Either way, we've made a decision; modulation mode
2351 * search is done, allow rate adjustment next time. */
2352 lq_sta
->search_better_tbl
= 0;
2353 done_search
= 1; /* Don't switch modes below! */
2357 /* (Else) not in search of better modulation mode, try for better
2358 * starting rate, while staying in this mode. */
2359 high_low
= rs_get_adjacent_rate(mvm
, index
, rate_mask
, rate
->type
);
2360 low
= high_low
& 0xff;
2361 high
= (high_low
>> 8) & 0xff;
2363 /* TODO: handle rate_idx_mask and rate_idx_mcs_mask */
2365 sr
= window
->success_ratio
;
2367 /* Collect measured throughputs for current and adjacent rates */
2368 current_tpt
= window
->average_tpt
;
2369 if (low
!= IWL_RATE_INVALID
)
2370 low_tpt
= tbl
->win
[low
].average_tpt
;
2371 if (high
!= IWL_RATE_INVALID
)
2372 high_tpt
= tbl
->win
[high
].average_tpt
;
2375 "%s: cur_tpt %d SR %d low %d high %d low_tpt %d high_tpt %d\n",
2376 rs_pretty_rate(rate
), current_tpt
, sr
,
2377 low
, high
, low_tpt
, high_tpt
);
2379 scale_action
= rs_get_rate_action(mvm
, tbl
, sr
, low
, high
,
2380 current_tpt
, low_tpt
, high_tpt
);
2382 /* Force a search in case BT doesn't like us being in MIMO */
2383 if (is_mimo(rate
) &&
2384 !iwl_mvm_bt_coex_is_mimo_allowed(mvm
, sta
)) {
2386 "BT Coex forbids MIMO. Search for new config\n");
2387 rs_stay_in_table(lq_sta
, true);
2391 switch (scale_action
) {
2392 case RS_ACTION_DOWNSCALE
:
2393 /* Decrease starting rate, update uCode's rate table */
2394 if (low
!= IWL_RATE_INVALID
) {
2399 "At the bottom rate. Can't decrease\n");
2403 case RS_ACTION_UPSCALE
:
2404 /* Increase starting rate, update uCode's rate table */
2405 if (high
!= IWL_RATE_INVALID
) {
2410 "At the top rate. Can't increase\n");
2414 case RS_ACTION_STAY
:
2416 if (lq_sta
->rs_state
== RS_STATE_STAY_IN_COLUMN
)
2417 update_lq
= rs_tpc_perform(mvm
, sta
, lq_sta
, tbl
);
2424 /* Replace uCode's rate table for the destination station. */
2426 tbl
->rate
.index
= index
;
2427 if (IWL_MVM_RS_80_20_FAR_RANGE_TWEAK
)
2428 rs_tweak_rate_tbl(mvm
, sta
, lq_sta
, tbl
, scale_action
);
2429 rs_set_amsdu_len(mvm
, sta
, tbl
, scale_action
);
2430 rs_update_rate_tbl(mvm
, sta
, lq_sta
, tbl
);
2433 rs_stay_in_table(lq_sta
, false);
2436 * Search for new modulation mode if we're:
2437 * 1) Not changing rates right now
2438 * 2) Not just finishing up a search
2439 * 3) Allowing a new search
2441 if (!update_lq
&& !done_search
&&
2442 lq_sta
->rs_state
== RS_STATE_SEARCH_CYCLE_STARTED
2443 && window
->counter
) {
2444 enum rs_column next_column
;
2446 /* Save current throughput to compare with "search" throughput*/
2447 lq_sta
->last_tpt
= current_tpt
;
2450 "Start Search: update_lq %d done_search %d rs_state %d win->counter %d\n",
2451 update_lq
, done_search
, lq_sta
->rs_state
,
2454 next_column
= rs_get_next_column(mvm
, lq_sta
, sta
, tbl
);
2455 if (next_column
!= RS_COLUMN_INVALID
) {
2456 int ret
= rs_switch_to_column(mvm
, lq_sta
, sta
,
2459 lq_sta
->search_better_tbl
= 1;
2462 "No more columns to explore in search cycle. Go to RS_STATE_SEARCH_CYCLE_ENDED\n");
2463 lq_sta
->rs_state
= RS_STATE_SEARCH_CYCLE_ENDED
;
2466 /* If new "search" mode was selected, set up in uCode table */
2467 if (lq_sta
->search_better_tbl
) {
2468 /* Access the "search" table, clear its history. */
2469 tbl
= &(lq_sta
->lq_info
[(1 - lq_sta
->active_tbl
)]);
2470 rs_rate_scale_clear_tbl_windows(mvm
, tbl
);
2472 /* Use new "search" start rate */
2473 index
= tbl
->rate
.index
;
2475 rs_dump_rate(mvm
, &tbl
->rate
,
2476 "Switch to SEARCH TABLE:");
2477 rs_update_rate_tbl(mvm
, sta
, lq_sta
, tbl
);
2483 if (done_search
&& lq_sta
->rs_state
== RS_STATE_SEARCH_CYCLE_ENDED
) {
2484 /* If the "active" (non-search) mode was legacy,
2485 * and we've tried switching antennas,
2486 * but we haven't been able to try HT modes (not available),
2487 * stay with best antenna legacy modulation for a while
2488 * before next round of mode comparisons. */
2489 tbl1
= &(lq_sta
->lq_info
[lq_sta
->active_tbl
]);
2490 if (is_legacy(&tbl1
->rate
)) {
2491 IWL_DEBUG_RATE(mvm
, "LQ: STAY in legacy table\n");
2493 if (tid
!= IWL_MAX_TID_COUNT
) {
2494 tid_data
= &sta_priv
->tid_data
[tid
];
2495 if (tid_data
->state
!= IWL_AGG_OFF
) {
2497 "Stop aggregation on tid %d\n",
2499 ieee80211_stop_tx_ba_session(sta
, tid
);
2502 rs_set_stay_in_table(mvm
, 1, lq_sta
);
2504 /* If we're in an HT mode, and all 3 mode switch actions
2505 * have been tried and compared, stay in this best modulation
2506 * mode for a while before next round of mode comparisons. */
2507 if ((lq_sta
->last_tpt
> IWL_AGG_TPT_THREHOLD
) &&
2508 (lq_sta
->tx_agg_tid_en
& (1 << tid
)) &&
2509 (tid
!= IWL_MAX_TID_COUNT
)) {
2510 tid_data
= &sta_priv
->tid_data
[tid
];
2511 if (tid_data
->state
== IWL_AGG_OFF
&& !ndp
) {
2513 "try to aggregate tid %d\n",
2515 rs_tl_turn_on_agg(mvm
, tid
,
2519 rs_set_stay_in_table(mvm
, 0, lq_sta
);
2524 struct rs_init_rate_info
{
2529 static const struct rs_init_rate_info rs_optimal_rates_24ghz_legacy
[] = {
2530 { -60, IWL_RATE_54M_INDEX
},
2531 { -64, IWL_RATE_48M_INDEX
},
2532 { -68, IWL_RATE_36M_INDEX
},
2533 { -80, IWL_RATE_24M_INDEX
},
2534 { -84, IWL_RATE_18M_INDEX
},
2535 { -85, IWL_RATE_12M_INDEX
},
2536 { -86, IWL_RATE_11M_INDEX
},
2537 { -88, IWL_RATE_5M_INDEX
},
2538 { -90, IWL_RATE_2M_INDEX
},
2539 { S8_MIN
, IWL_RATE_1M_INDEX
},
2542 static const struct rs_init_rate_info rs_optimal_rates_5ghz_legacy
[] = {
2543 { -60, IWL_RATE_54M_INDEX
},
2544 { -64, IWL_RATE_48M_INDEX
},
2545 { -72, IWL_RATE_36M_INDEX
},
2546 { -80, IWL_RATE_24M_INDEX
},
2547 { -84, IWL_RATE_18M_INDEX
},
2548 { -85, IWL_RATE_12M_INDEX
},
2549 { -87, IWL_RATE_9M_INDEX
},
2550 { S8_MIN
, IWL_RATE_6M_INDEX
},
2553 static const struct rs_init_rate_info rs_optimal_rates_ht
[] = {
2554 { -60, IWL_RATE_MCS_7_INDEX
},
2555 { -64, IWL_RATE_MCS_6_INDEX
},
2556 { -68, IWL_RATE_MCS_5_INDEX
},
2557 { -72, IWL_RATE_MCS_4_INDEX
},
2558 { -80, IWL_RATE_MCS_3_INDEX
},
2559 { -84, IWL_RATE_MCS_2_INDEX
},
2560 { -85, IWL_RATE_MCS_1_INDEX
},
2561 { S8_MIN
, IWL_RATE_MCS_0_INDEX
},
2564 /* MCS index 9 is not valid for 20MHz VHT channel width,
2565 * but is ok for 40, 80 and 160MHz channels.
2567 static const struct rs_init_rate_info rs_optimal_rates_vht_20mhz
[] = {
2568 { -60, IWL_RATE_MCS_8_INDEX
},
2569 { -64, IWL_RATE_MCS_7_INDEX
},
2570 { -68, IWL_RATE_MCS_6_INDEX
},
2571 { -72, IWL_RATE_MCS_5_INDEX
},
2572 { -80, IWL_RATE_MCS_4_INDEX
},
2573 { -84, IWL_RATE_MCS_3_INDEX
},
2574 { -85, IWL_RATE_MCS_2_INDEX
},
2575 { -87, IWL_RATE_MCS_1_INDEX
},
2576 { S8_MIN
, IWL_RATE_MCS_0_INDEX
},
2579 static const struct rs_init_rate_info rs_optimal_rates_vht
[] = {
2580 { -60, IWL_RATE_MCS_9_INDEX
},
2581 { -64, IWL_RATE_MCS_8_INDEX
},
2582 { -68, IWL_RATE_MCS_7_INDEX
},
2583 { -72, IWL_RATE_MCS_6_INDEX
},
2584 { -80, IWL_RATE_MCS_5_INDEX
},
2585 { -84, IWL_RATE_MCS_4_INDEX
},
2586 { -85, IWL_RATE_MCS_3_INDEX
},
2587 { -87, IWL_RATE_MCS_2_INDEX
},
2588 { -88, IWL_RATE_MCS_1_INDEX
},
2589 { S8_MIN
, IWL_RATE_MCS_0_INDEX
},
2592 #define IWL_RS_LOW_RSSI_THRESHOLD (-76) /* dBm */
2594 /* Init the optimal rate based on STA caps
2595 * This combined with rssi is used to report the last tx rate
2596 * to userspace when we haven't transmitted enough frames.
2598 static void rs_init_optimal_rate(struct iwl_mvm
*mvm
,
2599 struct ieee80211_sta
*sta
,
2600 struct iwl_lq_sta
*lq_sta
)
2602 struct rs_rate
*rate
= &lq_sta
->optimal_rate
;
2604 if (lq_sta
->max_mimo2_rate_idx
!= IWL_RATE_INVALID
)
2605 rate
->type
= lq_sta
->is_vht
? LQ_VHT_MIMO2
: LQ_HT_MIMO2
;
2606 else if (lq_sta
->max_siso_rate_idx
!= IWL_RATE_INVALID
)
2607 rate
->type
= lq_sta
->is_vht
? LQ_VHT_SISO
: LQ_HT_SISO
;
2608 else if (lq_sta
->band
== NL80211_BAND_5GHZ
)
2609 rate
->type
= LQ_LEGACY_A
;
2611 rate
->type
= LQ_LEGACY_G
;
2613 rate
->bw
= rs_bw_from_sta_bw(sta
);
2614 rate
->sgi
= rs_sgi_allow(mvm
, sta
, rate
, NULL
);
2616 /* ANT/LDPC/STBC aren't relevant for the rate reported to userspace */
2618 if (is_mimo(rate
)) {
2619 lq_sta
->optimal_rate_mask
= lq_sta
->active_mimo2_rate
;
2620 } else if (is_siso(rate
)) {
2621 lq_sta
->optimal_rate_mask
= lq_sta
->active_siso_rate
;
2623 lq_sta
->optimal_rate_mask
= lq_sta
->active_legacy_rate
;
2625 if (lq_sta
->band
== NL80211_BAND_5GHZ
) {
2626 lq_sta
->optimal_rates
= rs_optimal_rates_5ghz_legacy
;
2627 lq_sta
->optimal_nentries
=
2628 ARRAY_SIZE(rs_optimal_rates_5ghz_legacy
);
2630 lq_sta
->optimal_rates
= rs_optimal_rates_24ghz_legacy
;
2631 lq_sta
->optimal_nentries
=
2632 ARRAY_SIZE(rs_optimal_rates_24ghz_legacy
);
2637 if (rate
->bw
== RATE_MCS_CHAN_WIDTH_20
) {
2638 lq_sta
->optimal_rates
= rs_optimal_rates_vht_20mhz
;
2639 lq_sta
->optimal_nentries
=
2640 ARRAY_SIZE(rs_optimal_rates_vht_20mhz
);
2642 lq_sta
->optimal_rates
= rs_optimal_rates_vht
;
2643 lq_sta
->optimal_nentries
=
2644 ARRAY_SIZE(rs_optimal_rates_vht
);
2646 } else if (is_ht(rate
)) {
2647 lq_sta
->optimal_rates
= rs_optimal_rates_ht
;
2648 lq_sta
->optimal_nentries
= ARRAY_SIZE(rs_optimal_rates_ht
);
2652 /* Compute the optimal rate index based on RSSI */
2653 static struct rs_rate
*rs_get_optimal_rate(struct iwl_mvm
*mvm
,
2654 struct iwl_lq_sta
*lq_sta
)
2656 struct rs_rate
*rate
= &lq_sta
->optimal_rate
;
2659 rate
->index
= find_first_bit(&lq_sta
->optimal_rate_mask
,
2662 for (i
= 0; i
< lq_sta
->optimal_nentries
; i
++) {
2663 int rate_idx
= lq_sta
->optimal_rates
[i
].rate_idx
;
2665 if ((lq_sta
->pers
.last_rssi
>= lq_sta
->optimal_rates
[i
].rssi
) &&
2666 (BIT(rate_idx
) & lq_sta
->optimal_rate_mask
)) {
2667 rate
->index
= rate_idx
;
2675 /* Choose an initial legacy rate and antenna to use based on the RSSI
2678 static void rs_get_initial_rate(struct iwl_mvm
*mvm
,
2679 struct ieee80211_sta
*sta
,
2680 struct iwl_lq_sta
*lq_sta
,
2681 enum nl80211_band band
,
2682 struct rs_rate
*rate
)
2685 unsigned long active_rate
;
2686 s8 best_rssi
= S8_MIN
;
2687 u8 best_ant
= ANT_NONE
;
2688 u8 valid_tx_ant
= iwl_mvm_get_valid_tx_ant(mvm
);
2689 const struct rs_init_rate_info
*initial_rates
;
2691 for (i
= 0; i
< ARRAY_SIZE(lq_sta
->pers
.chain_signal
); i
++) {
2692 if (!(lq_sta
->pers
.chains
& BIT(i
)))
2695 if (lq_sta
->pers
.chain_signal
[i
] > best_rssi
) {
2696 best_rssi
= lq_sta
->pers
.chain_signal
[i
];
2701 IWL_DEBUG_RATE(mvm
, "Best ANT: %s Best RSSI: %d\n",
2702 rs_pretty_ant(best_ant
), best_rssi
);
2704 if (best_ant
!= ANT_A
&& best_ant
!= ANT_B
)
2705 rate
->ant
= first_antenna(valid_tx_ant
);
2707 rate
->ant
= best_ant
;
2711 rate
->bw
= RATE_MCS_CHAN_WIDTH_20
;
2713 rate
->index
= find_first_bit(&lq_sta
->active_legacy_rate
,
2716 if (band
== NL80211_BAND_5GHZ
) {
2717 rate
->type
= LQ_LEGACY_A
;
2718 initial_rates
= rs_optimal_rates_5ghz_legacy
;
2719 nentries
= ARRAY_SIZE(rs_optimal_rates_5ghz_legacy
);
2721 rate
->type
= LQ_LEGACY_G
;
2722 initial_rates
= rs_optimal_rates_24ghz_legacy
;
2723 nentries
= ARRAY_SIZE(rs_optimal_rates_24ghz_legacy
);
2726 if (!IWL_MVM_RS_RSSI_BASED_INIT_RATE
)
2729 /* Start from a higher rate if the corresponding debug capability
2730 * is enabled. The rate is chosen according to AP capabilities.
2731 * In case of VHT/HT when the rssi is low fallback to the case of
2734 if (sta
->vht_cap
.vht_supported
&&
2735 best_rssi
> IWL_RS_LOW_RSSI_THRESHOLD
) {
2736 switch (sta
->bandwidth
) {
2737 case IEEE80211_STA_RX_BW_160
:
2738 case IEEE80211_STA_RX_BW_80
:
2739 case IEEE80211_STA_RX_BW_40
:
2740 initial_rates
= rs_optimal_rates_vht
;
2741 nentries
= ARRAY_SIZE(rs_optimal_rates_vht
);
2743 case IEEE80211_STA_RX_BW_20
:
2744 initial_rates
= rs_optimal_rates_vht_20mhz
;
2745 nentries
= ARRAY_SIZE(rs_optimal_rates_vht_20mhz
);
2748 IWL_ERR(mvm
, "Invalid BW %d\n", sta
->bandwidth
);
2752 active_rate
= lq_sta
->active_siso_rate
;
2753 rate
->type
= LQ_VHT_SISO
;
2754 rate
->bw
= rs_bw_from_sta_bw(sta
);
2755 } else if (sta
->ht_cap
.ht_supported
&&
2756 best_rssi
> IWL_RS_LOW_RSSI_THRESHOLD
) {
2757 initial_rates
= rs_optimal_rates_ht
;
2758 nentries
= ARRAY_SIZE(rs_optimal_rates_ht
);
2759 active_rate
= lq_sta
->active_siso_rate
;
2760 rate
->type
= LQ_HT_SISO
;
2762 active_rate
= lq_sta
->active_legacy_rate
;
2765 for (i
= 0; i
< nentries
; i
++) {
2766 int rate_idx
= initial_rates
[i
].rate_idx
;
2768 if ((best_rssi
>= initial_rates
[i
].rssi
) &&
2769 (BIT(rate_idx
) & active_rate
)) {
2770 rate
->index
= rate_idx
;
2776 rs_dump_rate(mvm
, rate
, "INITIAL");
2779 /* Save info about RSSI of last Rx */
2780 void rs_update_last_rssi(struct iwl_mvm
*mvm
,
2781 struct iwl_lq_sta
*lq_sta
,
2782 struct ieee80211_rx_status
*rx_status
)
2786 lq_sta
->pers
.chains
= rx_status
->chains
;
2787 lq_sta
->pers
.chain_signal
[0] = rx_status
->chain_signal
[0];
2788 lq_sta
->pers
.chain_signal
[1] = rx_status
->chain_signal
[1];
2789 lq_sta
->pers
.chain_signal
[2] = rx_status
->chain_signal
[2];
2790 lq_sta
->pers
.last_rssi
= S8_MIN
;
2792 for (i
= 0; i
< ARRAY_SIZE(lq_sta
->pers
.chain_signal
); i
++) {
2793 if (!(lq_sta
->pers
.chains
& BIT(i
)))
2796 if (lq_sta
->pers
.chain_signal
[i
] > lq_sta
->pers
.last_rssi
)
2797 lq_sta
->pers
.last_rssi
= lq_sta
->pers
.chain_signal
[i
];
2802 * rs_initialize_lq - Initialize a station's hardware rate table
2804 * The uCode's station table contains a table of fallback rates
2805 * for automatic fallback during transmission.
2807 * NOTE: This sets up a default set of values. These will be replaced later
2808 * if the driver's iwl-agn-rs rate scaling algorithm is used, instead of
2811 * NOTE: Run REPLY_ADD_STA command to set up station table entry, before
2812 * calling this function (which runs REPLY_TX_LINK_QUALITY_CMD,
2813 * which requires station table entry to exist).
2815 static void rs_initialize_lq(struct iwl_mvm
*mvm
,
2816 struct ieee80211_sta
*sta
,
2817 struct iwl_lq_sta
*lq_sta
,
2818 enum nl80211_band band
,
2821 struct iwl_scale_tbl_info
*tbl
;
2822 struct rs_rate
*rate
;
2825 if (!sta
|| !lq_sta
)
2828 if (!lq_sta
->search_better_tbl
)
2829 active_tbl
= lq_sta
->active_tbl
;
2831 active_tbl
= 1 - lq_sta
->active_tbl
;
2833 tbl
= &(lq_sta
->lq_info
[active_tbl
]);
2836 rs_get_initial_rate(mvm
, sta
, lq_sta
, band
, rate
);
2837 rs_init_optimal_rate(mvm
, sta
, lq_sta
);
2839 WARN_ONCE(rate
->ant
!= ANT_A
&& rate
->ant
!= ANT_B
,
2840 "ant: 0x%x, chains 0x%x, fw tx ant: 0x%x, nvm tx ant: 0x%x\n",
2841 rate
->ant
, lq_sta
->pers
.chains
, mvm
->fw
->valid_tx_ant
,
2842 mvm
->nvm_data
? mvm
->nvm_data
->valid_tx_ant
: ANT_INVALID
);
2844 tbl
->column
= rs_get_column_from_rate(rate
);
2846 rs_set_expected_tpt_table(lq_sta
, tbl
);
2847 rs_fill_lq_cmd(mvm
, sta
, lq_sta
, rate
);
2848 /* TODO restore station should remember the lq cmd */
2849 iwl_mvm_send_lq_cmd(mvm
, &lq_sta
->lq
, init
);
2852 static void rs_get_rate(void *mvm_r
, struct ieee80211_sta
*sta
, void *mvm_sta
,
2853 struct ieee80211_tx_rate_control
*txrc
)
2855 struct sk_buff
*skb
= txrc
->skb
;
2856 struct iwl_op_mode
*op_mode __maybe_unused
=
2857 (struct iwl_op_mode
*)mvm_r
;
2858 struct iwl_mvm
*mvm __maybe_unused
= IWL_OP_MODE_GET_MVM(op_mode
);
2859 struct ieee80211_tx_info
*info
= IEEE80211_SKB_CB(skb
);
2860 struct iwl_lq_sta
*lq_sta
= mvm_sta
;
2861 struct rs_rate
*optimal_rate
;
2862 u32 last_ucode_rate
;
2864 if (sta
&& !iwl_mvm_sta_from_mac80211(sta
)->vif
) {
2865 /* if vif isn't initialized mvm doesn't know about
2866 * this station, so don't do anything with the it
2872 /* TODO: handle rate_idx_mask and rate_idx_mcs_mask */
2874 /* Treat uninitialized rate scaling data same as non-existing. */
2875 if (lq_sta
&& !lq_sta
->pers
.drv
) {
2876 IWL_DEBUG_RATE(mvm
, "Rate scaling not initialized yet.\n");
2880 /* Send management frames and NO_ACK data using lowest rate. */
2881 if (rate_control_send_low(sta
, mvm_sta
, txrc
))
2884 iwl_mvm_hwrate_to_tx_rate(lq_sta
->last_rate_n_flags
,
2885 info
->band
, &info
->control
.rates
[0]);
2886 info
->control
.rates
[0].count
= 1;
2888 /* Report the optimal rate based on rssi and STA caps if we haven't
2889 * converged yet (too little traffic) or exploring other modulations
2891 if (lq_sta
->rs_state
!= RS_STATE_STAY_IN_COLUMN
) {
2892 optimal_rate
= rs_get_optimal_rate(mvm
, lq_sta
);
2893 last_ucode_rate
= ucode_rate_from_rs_rate(mvm
,
2895 iwl_mvm_hwrate_to_tx_rate(last_ucode_rate
, info
->band
,
2896 &txrc
->reported_rate
);
2900 static void *rs_alloc_sta(void *mvm_rate
, struct ieee80211_sta
*sta
,
2903 struct iwl_mvm_sta
*sta_priv
= iwl_mvm_sta_from_mac80211(sta
);
2904 struct iwl_op_mode
*op_mode
= (struct iwl_op_mode
*)mvm_rate
;
2905 struct iwl_mvm
*mvm
= IWL_OP_MODE_GET_MVM(op_mode
);
2906 struct iwl_lq_sta
*lq_sta
= &sta_priv
->lq_sta
;
2908 IWL_DEBUG_RATE(mvm
, "create station rate scale window\n");
2910 lq_sta
->pers
.drv
= mvm
;
2911 #ifdef CONFIG_MAC80211_DEBUGFS
2912 lq_sta
->pers
.dbg_fixed_rate
= 0;
2913 lq_sta
->pers
.dbg_fixed_txp_reduction
= TPC_INVALID
;
2914 lq_sta
->pers
.ss_force
= RS_SS_FORCE_NONE
;
2916 lq_sta
->pers
.chains
= 0;
2917 memset(lq_sta
->pers
.chain_signal
, 0, sizeof(lq_sta
->pers
.chain_signal
));
2918 lq_sta
->pers
.last_rssi
= S8_MIN
;
2920 return &sta_priv
->lq_sta
;
2923 static int rs_vht_highest_rx_mcs_index(struct ieee80211_sta_vht_cap
*vht_cap
,
2926 u16 rx_mcs
= le16_to_cpu(vht_cap
->vht_mcs
.rx_mcs_map
) &
2927 (0x3 << (2 * (nss
- 1)));
2928 rx_mcs
>>= (2 * (nss
- 1));
2930 if (rx_mcs
== IEEE80211_VHT_MCS_SUPPORT_0_7
)
2931 return IWL_RATE_MCS_7_INDEX
;
2932 else if (rx_mcs
== IEEE80211_VHT_MCS_SUPPORT_0_8
)
2933 return IWL_RATE_MCS_8_INDEX
;
2934 else if (rx_mcs
== IEEE80211_VHT_MCS_SUPPORT_0_9
)
2935 return IWL_RATE_MCS_9_INDEX
;
2937 WARN_ON_ONCE(rx_mcs
!= IEEE80211_VHT_MCS_NOT_SUPPORTED
);
2941 static void rs_vht_set_enabled_rates(struct ieee80211_sta
*sta
,
2942 struct ieee80211_sta_vht_cap
*vht_cap
,
2943 struct iwl_lq_sta
*lq_sta
)
2946 int highest_mcs
= rs_vht_highest_rx_mcs_index(vht_cap
, 1);
2948 if (highest_mcs
>= IWL_RATE_MCS_0_INDEX
) {
2949 for (i
= IWL_RATE_MCS_0_INDEX
; i
<= highest_mcs
; i
++) {
2950 if (i
== IWL_RATE_9M_INDEX
)
2953 /* VHT MCS9 isn't valid for 20Mhz for NSS=1,2 */
2954 if (i
== IWL_RATE_MCS_9_INDEX
&&
2955 sta
->bandwidth
== IEEE80211_STA_RX_BW_20
)
2958 lq_sta
->active_siso_rate
|= BIT(i
);
2962 if (sta
->rx_nss
< 2)
2965 highest_mcs
= rs_vht_highest_rx_mcs_index(vht_cap
, 2);
2966 if (highest_mcs
>= IWL_RATE_MCS_0_INDEX
) {
2967 for (i
= IWL_RATE_MCS_0_INDEX
; i
<= highest_mcs
; i
++) {
2968 if (i
== IWL_RATE_9M_INDEX
)
2971 /* VHT MCS9 isn't valid for 20Mhz for NSS=1,2 */
2972 if (i
== IWL_RATE_MCS_9_INDEX
&&
2973 sta
->bandwidth
== IEEE80211_STA_RX_BW_20
)
2976 lq_sta
->active_mimo2_rate
|= BIT(i
);
2981 static void rs_ht_init(struct iwl_mvm
*mvm
,
2982 struct ieee80211_sta
*sta
,
2983 struct iwl_lq_sta
*lq_sta
,
2984 struct ieee80211_sta_ht_cap
*ht_cap
)
2986 /* active_siso_rate mask includes 9 MBits (bit 5),
2987 * and CCK (bits 0-3), supp_rates[] does not;
2988 * shift to convert format, force 9 MBits off.
2990 lq_sta
->active_siso_rate
= ht_cap
->mcs
.rx_mask
[0] << 1;
2991 lq_sta
->active_siso_rate
|= ht_cap
->mcs
.rx_mask
[0] & 0x1;
2992 lq_sta
->active_siso_rate
&= ~((u16
)0x2);
2993 lq_sta
->active_siso_rate
<<= IWL_FIRST_OFDM_RATE
;
2995 lq_sta
->active_mimo2_rate
= ht_cap
->mcs
.rx_mask
[1] << 1;
2996 lq_sta
->active_mimo2_rate
|= ht_cap
->mcs
.rx_mask
[1] & 0x1;
2997 lq_sta
->active_mimo2_rate
&= ~((u16
)0x2);
2998 lq_sta
->active_mimo2_rate
<<= IWL_FIRST_OFDM_RATE
;
3000 if (mvm
->cfg
->ht_params
->ldpc
&&
3001 (ht_cap
->cap
& IEEE80211_HT_CAP_LDPC_CODING
))
3002 lq_sta
->ldpc
= true;
3004 if (mvm
->cfg
->ht_params
->stbc
&&
3005 (num_of_ant(iwl_mvm_get_valid_tx_ant(mvm
)) > 1) &&
3006 (ht_cap
->cap
& IEEE80211_HT_CAP_RX_STBC
))
3007 lq_sta
->stbc_capable
= true;
3009 lq_sta
->is_vht
= false;
3012 static void rs_vht_init(struct iwl_mvm
*mvm
,
3013 struct ieee80211_sta
*sta
,
3014 struct iwl_lq_sta
*lq_sta
,
3015 struct ieee80211_sta_vht_cap
*vht_cap
)
3017 rs_vht_set_enabled_rates(sta
, vht_cap
, lq_sta
);
3019 if (mvm
->cfg
->ht_params
->ldpc
&&
3020 (vht_cap
->cap
& IEEE80211_VHT_CAP_RXLDPC
))
3021 lq_sta
->ldpc
= true;
3023 if (mvm
->cfg
->ht_params
->stbc
&&
3024 (num_of_ant(iwl_mvm_get_valid_tx_ant(mvm
)) > 1) &&
3025 (vht_cap
->cap
& IEEE80211_VHT_CAP_RXSTBC_MASK
))
3026 lq_sta
->stbc_capable
= true;
3028 if (fw_has_capa(&mvm
->fw
->ucode_capa
, IWL_UCODE_TLV_CAPA_BEAMFORMER
) &&
3029 (num_of_ant(iwl_mvm_get_valid_tx_ant(mvm
)) > 1) &&
3030 (vht_cap
->cap
& IEEE80211_VHT_CAP_SU_BEAMFORMEE_CAPABLE
))
3031 lq_sta
->bfer_capable
= true;
3033 lq_sta
->is_vht
= true;
3036 #ifdef CONFIG_IWLWIFI_DEBUGFS
3037 static void iwl_mvm_reset_frame_stats(struct iwl_mvm
*mvm
)
3039 spin_lock_bh(&mvm
->drv_stats_lock
);
3040 memset(&mvm
->drv_rx_stats
, 0, sizeof(mvm
->drv_rx_stats
));
3041 spin_unlock_bh(&mvm
->drv_stats_lock
);
3044 void iwl_mvm_update_frame_stats(struct iwl_mvm
*mvm
, u32 rate
, bool agg
)
3048 spin_lock(&mvm
->drv_stats_lock
);
3051 mvm
->drv_rx_stats
.agg_frames
++;
3053 mvm
->drv_rx_stats
.success_frames
++;
3055 switch (rate
& RATE_MCS_CHAN_WIDTH_MSK
) {
3056 case RATE_MCS_CHAN_WIDTH_20
:
3057 mvm
->drv_rx_stats
.bw_20_frames
++;
3059 case RATE_MCS_CHAN_WIDTH_40
:
3060 mvm
->drv_rx_stats
.bw_40_frames
++;
3062 case RATE_MCS_CHAN_WIDTH_80
:
3063 mvm
->drv_rx_stats
.bw_80_frames
++;
3065 case RATE_MCS_CHAN_WIDTH_160
:
3066 mvm
->drv_rx_stats
.bw_160_frames
++;
3069 WARN_ONCE(1, "bad BW. rate 0x%x", rate
);
3072 if (rate
& RATE_MCS_HT_MSK
) {
3073 mvm
->drv_rx_stats
.ht_frames
++;
3074 nss
= ((rate
& RATE_HT_MCS_NSS_MSK
) >> RATE_HT_MCS_NSS_POS
) + 1;
3075 } else if (rate
& RATE_MCS_VHT_MSK
) {
3076 mvm
->drv_rx_stats
.vht_frames
++;
3077 nss
= ((rate
& RATE_VHT_MCS_NSS_MSK
) >>
3078 RATE_VHT_MCS_NSS_POS
) + 1;
3080 mvm
->drv_rx_stats
.legacy_frames
++;
3084 mvm
->drv_rx_stats
.siso_frames
++;
3086 mvm
->drv_rx_stats
.mimo2_frames
++;
3088 if (rate
& RATE_MCS_SGI_MSK
)
3089 mvm
->drv_rx_stats
.sgi_frames
++;
3091 mvm
->drv_rx_stats
.ngi_frames
++;
3093 mvm
->drv_rx_stats
.last_rates
[mvm
->drv_rx_stats
.last_frame_idx
] = rate
;
3094 mvm
->drv_rx_stats
.last_frame_idx
=
3095 (mvm
->drv_rx_stats
.last_frame_idx
+ 1) %
3096 ARRAY_SIZE(mvm
->drv_rx_stats
.last_rates
);
3098 spin_unlock(&mvm
->drv_stats_lock
);
3103 * Called after adding a new station to initialize rate scaling
3105 void iwl_mvm_rs_rate_init(struct iwl_mvm
*mvm
, struct ieee80211_sta
*sta
,
3106 enum nl80211_band band
, bool init
)
3109 struct ieee80211_hw
*hw
= mvm
->hw
;
3110 struct ieee80211_sta_ht_cap
*ht_cap
= &sta
->ht_cap
;
3111 struct ieee80211_sta_vht_cap
*vht_cap
= &sta
->vht_cap
;
3112 struct iwl_mvm_sta
*sta_priv
= iwl_mvm_sta_from_mac80211(sta
);
3113 struct iwl_lq_sta
*lq_sta
= &sta_priv
->lq_sta
;
3114 struct ieee80211_supported_band
*sband
;
3115 unsigned long supp
; /* must be unsigned long for for_each_set_bit */
3117 /* clear all non-persistent lq data */
3118 memset(lq_sta
, 0, offsetof(typeof(*lq_sta
), pers
));
3120 sband
= hw
->wiphy
->bands
[band
];
3122 lq_sta
->lq
.sta_id
= sta_priv
->sta_id
;
3123 sta_priv
->tlc_amsdu
= false;
3125 for (j
= 0; j
< LQ_SIZE
; j
++)
3126 rs_rate_scale_clear_tbl_windows(mvm
, &lq_sta
->lq_info
[j
]);
3128 lq_sta
->flush_timer
= 0;
3129 lq_sta
->last_tx
= jiffies
;
3132 "LQ: *** rate scale station global init for station %d ***\n",
3134 /* TODO: what is a good starting rate for STA? About middle? Maybe not
3135 * the lowest or the highest rate.. Could consider using RSSI from
3136 * previous packets? Need to have IEEE 802.1X auth succeed immediately
3139 lq_sta
->missed_rate_counter
= IWL_MVM_RS_MISSED_RATE_MAX
;
3140 lq_sta
->band
= sband
->band
;
3142 * active legacy rates as per supported rates bitmap
3144 supp
= sta
->supp_rates
[sband
->band
];
3145 lq_sta
->active_legacy_rate
= 0;
3146 for_each_set_bit(i
, &supp
, BITS_PER_LONG
)
3147 lq_sta
->active_legacy_rate
|= BIT(sband
->bitrates
[i
].hw_value
);
3149 /* TODO: should probably account for rx_highest for both HT/VHT */
3150 if (!vht_cap
|| !vht_cap
->vht_supported
)
3151 rs_ht_init(mvm
, sta
, lq_sta
, ht_cap
);
3153 rs_vht_init(mvm
, sta
, lq_sta
, vht_cap
);
3155 lq_sta
->max_legacy_rate_idx
=
3156 rs_get_max_rate_from_mask(lq_sta
->active_legacy_rate
);
3157 lq_sta
->max_siso_rate_idx
=
3158 rs_get_max_rate_from_mask(lq_sta
->active_siso_rate
);
3159 lq_sta
->max_mimo2_rate_idx
=
3160 rs_get_max_rate_from_mask(lq_sta
->active_mimo2_rate
);
3163 "LEGACY=%lX SISO=%lX MIMO2=%lX VHT=%d LDPC=%d STBC=%d BFER=%d\n",
3164 lq_sta
->active_legacy_rate
,
3165 lq_sta
->active_siso_rate
,
3166 lq_sta
->active_mimo2_rate
,
3167 lq_sta
->is_vht
, lq_sta
->ldpc
, lq_sta
->stbc_capable
,
3168 lq_sta
->bfer_capable
);
3169 IWL_DEBUG_RATE(mvm
, "MAX RATE: LEGACY=%d SISO=%d MIMO2=%d\n",
3170 lq_sta
->max_legacy_rate_idx
,
3171 lq_sta
->max_siso_rate_idx
,
3172 lq_sta
->max_mimo2_rate_idx
);
3174 /* These values will be overridden later */
3175 lq_sta
->lq
.single_stream_ant_msk
=
3176 first_antenna(iwl_mvm_get_valid_tx_ant(mvm
));
3177 lq_sta
->lq
.dual_stream_ant_msk
= ANT_AB
;
3179 /* as default allow aggregation for all tids */
3180 lq_sta
->tx_agg_tid_en
= IWL_AGG_ALL_TID
;
3182 #ifdef CONFIG_IWLWIFI_DEBUGFS
3183 iwl_mvm_reset_frame_stats(mvm
);
3185 rs_initialize_lq(mvm
, sta
, lq_sta
, band
, init
);
3188 static void rs_rate_update(void *mvm_r
,
3189 struct ieee80211_supported_band
*sband
,
3190 struct cfg80211_chan_def
*chandef
,
3191 struct ieee80211_sta
*sta
, void *priv_sta
,
3195 struct iwl_op_mode
*op_mode
=
3196 (struct iwl_op_mode
*)mvm_r
;
3197 struct iwl_mvm
*mvm
= IWL_OP_MODE_GET_MVM(op_mode
);
3199 if (!iwl_mvm_sta_from_mac80211(sta
)->vif
)
3202 /* Stop any ongoing aggregations as rs starts off assuming no agg */
3203 for (tid
= 0; tid
< IWL_MAX_TID_COUNT
; tid
++)
3204 ieee80211_stop_tx_ba_session(sta
, tid
);
3206 iwl_mvm_rs_rate_init(mvm
, sta
, sband
->band
, false);
3209 #ifdef CONFIG_MAC80211_DEBUGFS
3210 static void rs_build_rates_table_from_fixed(struct iwl_mvm
*mvm
,
3211 struct iwl_lq_cmd
*lq_cmd
,
3212 enum nl80211_band band
,
3215 struct rs_rate rate
;
3217 int num_rates
= ARRAY_SIZE(lq_cmd
->rs_table
);
3218 __le32 ucode_rate_le32
= cpu_to_le32(ucode_rate
);
3219 u8 ant
= (ucode_rate
& RATE_MCS_ANT_ABC_MSK
) >> RATE_MCS_ANT_POS
;
3221 for (i
= 0; i
< num_rates
; i
++)
3222 lq_cmd
->rs_table
[i
] = ucode_rate_le32
;
3224 rs_rate_from_ucode_rate(ucode_rate
, band
, &rate
);
3227 lq_cmd
->mimo_delim
= num_rates
- 1;
3229 lq_cmd
->mimo_delim
= 0;
3231 lq_cmd
->reduced_tpc
= 0;
3233 if (num_of_ant(ant
) == 1)
3234 lq_cmd
->single_stream_ant_msk
= ant
;
3236 if (!mvm
->trans
->cfg
->gen2
)
3237 lq_cmd
->agg_frame_cnt_limit
= LINK_QUAL_AGG_FRAME_LIMIT_DEF
;
3239 lq_cmd
->agg_frame_cnt_limit
=
3240 LINK_QUAL_AGG_FRAME_LIMIT_GEN2_DEF
;
3242 #endif /* CONFIG_MAC80211_DEBUGFS */
3244 static void rs_fill_rates_for_column(struct iwl_mvm
*mvm
,
3245 struct iwl_lq_sta
*lq_sta
,
3246 struct rs_rate
*rate
,
3247 __le32
*rs_table
, int *rs_table_index
,
3248 int num_rates
, int num_retries
,
3249 u8 valid_tx_ant
, bool toggle_ant
)
3253 bool bottom_reached
= false;
3254 int prev_rate_idx
= rate
->index
;
3255 int end
= LINK_QUAL_MAX_RETRY_NUM
;
3256 int index
= *rs_table_index
;
3258 for (i
= 0; i
< num_rates
&& index
< end
; i
++) {
3259 for (j
= 0; j
< num_retries
&& index
< end
; j
++, index
++) {
3260 ucode_rate
= cpu_to_le32(ucode_rate_from_rs_rate(mvm
,
3262 rs_table
[index
] = ucode_rate
;
3264 rs_toggle_antenna(valid_tx_ant
, rate
);
3267 prev_rate_idx
= rate
->index
;
3268 bottom_reached
= rs_get_lower_rate_in_column(lq_sta
, rate
);
3269 if (bottom_reached
&& !is_legacy(rate
))
3273 if (!bottom_reached
&& !is_legacy(rate
))
3274 rate
->index
= prev_rate_idx
;
3276 *rs_table_index
= index
;
3279 /* Building the rate table is non trivial. When we're in MIMO2/VHT/80Mhz/SGI
3280 * column the rate table should look like this:
3282 * rate[0] 0x400D019 VHT | ANT: AB BW: 80Mhz MCS: 9 NSS: 2 SGI
3283 * rate[1] 0x400D019 VHT | ANT: AB BW: 80Mhz MCS: 9 NSS: 2 SGI
3284 * rate[2] 0x400D018 VHT | ANT: AB BW: 80Mhz MCS: 8 NSS: 2 SGI
3285 * rate[3] 0x400D018 VHT | ANT: AB BW: 80Mhz MCS: 8 NSS: 2 SGI
3286 * rate[4] 0x400D017 VHT | ANT: AB BW: 80Mhz MCS: 7 NSS: 2 SGI
3287 * rate[5] 0x400D017 VHT | ANT: AB BW: 80Mhz MCS: 7 NSS: 2 SGI
3288 * rate[6] 0x4005007 VHT | ANT: A BW: 80Mhz MCS: 7 NSS: 1 NGI
3289 * rate[7] 0x4009006 VHT | ANT: B BW: 80Mhz MCS: 6 NSS: 1 NGI
3290 * rate[8] 0x4005005 VHT | ANT: A BW: 80Mhz MCS: 5 NSS: 1 NGI
3291 * rate[9] 0x800B Legacy | ANT: B Rate: 36 Mbps
3292 * rate[10] 0x4009 Legacy | ANT: A Rate: 24 Mbps
3293 * rate[11] 0x8007 Legacy | ANT: B Rate: 18 Mbps
3294 * rate[12] 0x4005 Legacy | ANT: A Rate: 12 Mbps
3295 * rate[13] 0x800F Legacy | ANT: B Rate: 9 Mbps
3296 * rate[14] 0x400D Legacy | ANT: A Rate: 6 Mbps
3297 * rate[15] 0x800D Legacy | ANT: B Rate: 6 Mbps
3299 static void rs_build_rates_table(struct iwl_mvm
*mvm
,
3300 struct ieee80211_sta
*sta
,
3301 struct iwl_lq_sta
*lq_sta
,
3302 const struct rs_rate
*initial_rate
)
3304 struct rs_rate rate
;
3305 int num_rates
, num_retries
, index
= 0;
3306 u8 valid_tx_ant
= 0;
3307 struct iwl_lq_cmd
*lq_cmd
= &lq_sta
->lq
;
3308 bool toggle_ant
= false;
3311 memcpy(&rate
, initial_rate
, sizeof(rate
));
3313 valid_tx_ant
= iwl_mvm_get_valid_tx_ant(mvm
);
3315 /* TODO: remove old API when min FW API hits 14 */
3316 if (!fw_has_api(&mvm
->fw
->ucode_capa
, IWL_UCODE_TLV_API_LQ_SS_PARAMS
) &&
3317 rs_stbc_allow(mvm
, sta
, lq_sta
))
3320 if (is_siso(&rate
)) {
3321 num_rates
= IWL_MVM_RS_INITIAL_SISO_NUM_RATES
;
3322 num_retries
= IWL_MVM_RS_HT_VHT_RETRIES_PER_RATE
;
3323 } else if (is_mimo(&rate
)) {
3324 num_rates
= IWL_MVM_RS_INITIAL_MIMO_NUM_RATES
;
3325 num_retries
= IWL_MVM_RS_HT_VHT_RETRIES_PER_RATE
;
3327 num_rates
= IWL_MVM_RS_INITIAL_LEGACY_NUM_RATES
;
3328 num_retries
= IWL_MVM_RS_INITIAL_LEGACY_RETRIES
;
3332 rs_fill_rates_for_column(mvm
, lq_sta
, &rate
, lq_cmd
->rs_table
, &index
,
3333 num_rates
, num_retries
, valid_tx_ant
,
3336 rs_get_lower_rate_down_column(lq_sta
, &rate
);
3338 if (is_siso(&rate
)) {
3339 num_rates
= IWL_MVM_RS_SECONDARY_SISO_NUM_RATES
;
3340 num_retries
= IWL_MVM_RS_SECONDARY_SISO_RETRIES
;
3341 lq_cmd
->mimo_delim
= index
;
3342 } else if (is_legacy(&rate
)) {
3343 num_rates
= IWL_MVM_RS_SECONDARY_LEGACY_NUM_RATES
;
3344 num_retries
= IWL_MVM_RS_SECONDARY_LEGACY_RETRIES
;
3351 rs_fill_rates_for_column(mvm
, lq_sta
, &rate
, lq_cmd
->rs_table
, &index
,
3352 num_rates
, num_retries
, valid_tx_ant
,
3355 rs_get_lower_rate_down_column(lq_sta
, &rate
);
3357 num_rates
= IWL_MVM_RS_SECONDARY_LEGACY_NUM_RATES
;
3358 num_retries
= IWL_MVM_RS_SECONDARY_LEGACY_RETRIES
;
3360 rs_fill_rates_for_column(mvm
, lq_sta
, &rate
, lq_cmd
->rs_table
, &index
,
3361 num_rates
, num_retries
, valid_tx_ant
,
3364 /* update the color of the LQ command (as a counter at bits 1-3) */
3365 color
= LQ_FLAGS_COLOR_INC(LQ_FLAG_COLOR_GET(lq_cmd
->flags
));
3366 lq_cmd
->flags
= LQ_FLAG_COLOR_SET(lq_cmd
->flags
, color
);
3369 struct rs_bfer_active_iter_data
{
3370 struct ieee80211_sta
*exclude_sta
;
3371 struct iwl_mvm_sta
*bfer_mvmsta
;
3374 static void rs_bfer_active_iter(void *_data
,
3375 struct ieee80211_sta
*sta
)
3377 struct rs_bfer_active_iter_data
*data
= _data
;
3378 struct iwl_mvm_sta
*mvmsta
= iwl_mvm_sta_from_mac80211(sta
);
3379 struct iwl_lq_cmd
*lq_cmd
= &mvmsta
->lq_sta
.lq
;
3380 u32 ss_params
= le32_to_cpu(lq_cmd
->ss_params
);
3382 if (sta
== data
->exclude_sta
)
3385 /* The current sta has BFER allowed */
3386 if (ss_params
& LQ_SS_BFER_ALLOWED
) {
3387 WARN_ON_ONCE(data
->bfer_mvmsta
!= NULL
);
3389 data
->bfer_mvmsta
= mvmsta
;
3393 static int rs_bfer_priority(struct iwl_mvm_sta
*sta
)
3396 enum nl80211_iftype viftype
= ieee80211_vif_type_p2p(sta
->vif
);
3399 case NL80211_IFTYPE_AP
:
3400 case NL80211_IFTYPE_P2P_GO
:
3403 case NL80211_IFTYPE_P2P_CLIENT
:
3406 case NL80211_IFTYPE_STATION
:
3410 WARN_ONCE(true, "viftype %d sta_id %d", viftype
, sta
->sta_id
);
3417 /* Returns >0 if sta1 has a higher BFER priority compared to sta2 */
3418 static int rs_bfer_priority_cmp(struct iwl_mvm_sta
*sta1
,
3419 struct iwl_mvm_sta
*sta2
)
3421 int prio1
= rs_bfer_priority(sta1
);
3422 int prio2
= rs_bfer_priority(sta2
);
3431 static void rs_set_lq_ss_params(struct iwl_mvm
*mvm
,
3432 struct ieee80211_sta
*sta
,
3433 struct iwl_lq_sta
*lq_sta
,
3434 const struct rs_rate
*initial_rate
)
3436 struct iwl_lq_cmd
*lq_cmd
= &lq_sta
->lq
;
3437 struct iwl_mvm_sta
*mvmsta
= iwl_mvm_sta_from_mac80211(sta
);
3438 struct rs_bfer_active_iter_data data
= {
3440 .bfer_mvmsta
= NULL
,
3442 struct iwl_mvm_sta
*bfer_mvmsta
= NULL
;
3443 u32 ss_params
= LQ_SS_PARAMS_VALID
;
3445 if (!iwl_mvm_bt_coex_is_mimo_allowed(mvm
, sta
))
3448 #ifdef CONFIG_MAC80211_DEBUGFS
3449 /* Check if forcing the decision is configured.
3450 * Note that SISO is forced by not allowing STBC or BFER
3452 if (lq_sta
->pers
.ss_force
== RS_SS_FORCE_STBC
)
3453 ss_params
|= (LQ_SS_STBC_1SS_ALLOWED
| LQ_SS_FORCE
);
3454 else if (lq_sta
->pers
.ss_force
== RS_SS_FORCE_BFER
)
3455 ss_params
|= (LQ_SS_BFER_ALLOWED
| LQ_SS_FORCE
);
3457 if (lq_sta
->pers
.ss_force
!= RS_SS_FORCE_NONE
) {
3458 IWL_DEBUG_RATE(mvm
, "Forcing single stream Tx decision %d\n",
3459 lq_sta
->pers
.ss_force
);
3464 if (lq_sta
->stbc_capable
)
3465 ss_params
|= LQ_SS_STBC_1SS_ALLOWED
;
3467 if (!lq_sta
->bfer_capable
)
3470 ieee80211_iterate_stations_atomic(mvm
->hw
,
3471 rs_bfer_active_iter
,
3473 bfer_mvmsta
= data
.bfer_mvmsta
;
3475 /* This code is safe as it doesn't run concurrently for different
3476 * stations. This is guaranteed by the fact that calls to
3477 * ieee80211_tx_status wouldn't run concurrently for a single HW.
3480 IWL_DEBUG_RATE(mvm
, "No sta with BFER allowed found. Allow\n");
3482 ss_params
|= LQ_SS_BFER_ALLOWED
;
3486 IWL_DEBUG_RATE(mvm
, "Found existing sta %d with BFER activated\n",
3487 bfer_mvmsta
->sta_id
);
3489 /* Disallow BFER on another STA if active and we're a higher priority */
3490 if (rs_bfer_priority_cmp(mvmsta
, bfer_mvmsta
) > 0) {
3491 struct iwl_lq_cmd
*bfersta_lq_cmd
= &bfer_mvmsta
->lq_sta
.lq
;
3492 u32 bfersta_ss_params
= le32_to_cpu(bfersta_lq_cmd
->ss_params
);
3494 bfersta_ss_params
&= ~LQ_SS_BFER_ALLOWED
;
3495 bfersta_lq_cmd
->ss_params
= cpu_to_le32(bfersta_ss_params
);
3496 iwl_mvm_send_lq_cmd(mvm
, bfersta_lq_cmd
, false);
3498 ss_params
|= LQ_SS_BFER_ALLOWED
;
3500 "Lower priority BFER sta found (%d). Switch BFER\n",
3501 bfer_mvmsta
->sta_id
);
3504 lq_cmd
->ss_params
= cpu_to_le32(ss_params
);
3507 static void rs_fill_lq_cmd(struct iwl_mvm
*mvm
,
3508 struct ieee80211_sta
*sta
,
3509 struct iwl_lq_sta
*lq_sta
,
3510 const struct rs_rate
*initial_rate
)
3512 struct iwl_lq_cmd
*lq_cmd
= &lq_sta
->lq
;
3513 struct iwl_mvm_sta
*mvmsta
;
3514 struct iwl_mvm_vif
*mvmvif
;
3516 lq_cmd
->agg_disable_start_th
= IWL_MVM_RS_AGG_DISABLE_START
;
3517 lq_cmd
->agg_time_limit
=
3518 cpu_to_le16(IWL_MVM_RS_AGG_TIME_LIMIT
);
3520 #ifdef CONFIG_MAC80211_DEBUGFS
3521 if (lq_sta
->pers
.dbg_fixed_rate
) {
3522 rs_build_rates_table_from_fixed(mvm
, lq_cmd
,
3524 lq_sta
->pers
.dbg_fixed_rate
);
3528 if (WARN_ON_ONCE(!sta
|| !initial_rate
))
3531 rs_build_rates_table(mvm
, sta
, lq_sta
, initial_rate
);
3533 if (fw_has_api(&mvm
->fw
->ucode_capa
, IWL_UCODE_TLV_API_LQ_SS_PARAMS
))
3534 rs_set_lq_ss_params(mvm
, sta
, lq_sta
, initial_rate
);
3536 mvmsta
= iwl_mvm_sta_from_mac80211(sta
);
3537 mvmvif
= iwl_mvm_vif_from_mac80211(mvmsta
->vif
);
3539 if (num_of_ant(initial_rate
->ant
) == 1)
3540 lq_cmd
->single_stream_ant_msk
= initial_rate
->ant
;
3542 lq_cmd
->agg_frame_cnt_limit
= mvmsta
->max_agg_bufsize
;
3545 * In case of low latency, tell the firmware to leave a frame in the
3546 * Tx Fifo so that it can start a transaction in the same TxOP. This
3547 * basically allows the firmware to send bursts.
3549 if (iwl_mvm_vif_low_latency(mvmvif
))
3550 lq_cmd
->agg_frame_cnt_limit
--;
3552 if (mvmsta
->vif
->p2p
)
3553 lq_cmd
->flags
|= LQ_FLAG_USE_RTS_MSK
;
3555 lq_cmd
->agg_time_limit
=
3556 cpu_to_le16(iwl_mvm_coex_agg_time_limit(mvm
, sta
));
3559 static void *rs_alloc(struct ieee80211_hw
*hw
, struct dentry
*debugfsdir
)
3563 /* rate scale requires free function to be implemented */
3564 static void rs_free(void *mvm_rate
)
3569 static void rs_free_sta(void *mvm_r
, struct ieee80211_sta
*sta
,
3572 struct iwl_op_mode
*op_mode __maybe_unused
= mvm_r
;
3573 struct iwl_mvm
*mvm __maybe_unused
= IWL_OP_MODE_GET_MVM(op_mode
);
3575 IWL_DEBUG_RATE(mvm
, "enter\n");
3576 IWL_DEBUG_RATE(mvm
, "leave\n");
3579 #ifdef CONFIG_MAC80211_DEBUGFS
3580 int rs_pretty_print_rate(char *buf
, const u32 rate
)
3584 u8 mcs
= 0, nss
= 0;
3585 u8 ant
= (rate
& RATE_MCS_ANT_ABC_MSK
) >> RATE_MCS_ANT_POS
;
3587 if (!(rate
& RATE_MCS_HT_MSK
) &&
3588 !(rate
& RATE_MCS_VHT_MSK
)) {
3589 int index
= iwl_hwrate_to_plcp_idx(rate
);
3591 return sprintf(buf
, "Legacy | ANT: %s Rate: %s Mbps\n",
3593 index
== IWL_RATE_INVALID
? "BAD" :
3594 iwl_rate_mcs
[index
].mbps
);
3597 if (rate
& RATE_MCS_VHT_MSK
) {
3599 mcs
= rate
& RATE_VHT_MCS_RATE_CODE_MSK
;
3600 nss
= ((rate
& RATE_VHT_MCS_NSS_MSK
)
3601 >> RATE_VHT_MCS_NSS_POS
) + 1;
3602 } else if (rate
& RATE_MCS_HT_MSK
) {
3604 mcs
= rate
& RATE_HT_MCS_INDEX_MSK
;
3605 nss
= ((rate
& RATE_HT_MCS_NSS_MSK
)
3606 >> RATE_HT_MCS_NSS_POS
) + 1;
3608 type
= "Unknown"; /* shouldn't happen */
3611 switch (rate
& RATE_MCS_CHAN_WIDTH_MSK
) {
3612 case RATE_MCS_CHAN_WIDTH_20
:
3615 case RATE_MCS_CHAN_WIDTH_40
:
3618 case RATE_MCS_CHAN_WIDTH_80
:
3621 case RATE_MCS_CHAN_WIDTH_160
:
3628 return sprintf(buf
, "%s | ANT: %s BW: %s MCS: %d NSS: %d %s%s%s%s\n",
3629 type
, rs_pretty_ant(ant
), bw
, mcs
, nss
,
3630 (rate
& RATE_MCS_SGI_MSK
) ? "SGI " : "NGI ",
3631 (rate
& RATE_MCS_STBC_MSK
) ? "STBC " : "",
3632 (rate
& RATE_MCS_LDPC_MSK
) ? "LDPC " : "",
3633 (rate
& RATE_MCS_BF_MSK
) ? "BF " : "");
3637 * Program the device to use fixed rate for frame transmit
3638 * This is for debugging/testing only
3639 * once the device start use fixed rate, we need to reload the module
3640 * to being back the normal operation.
3642 static void rs_program_fix_rate(struct iwl_mvm
*mvm
,
3643 struct iwl_lq_sta
*lq_sta
)
3645 lq_sta
->active_legacy_rate
= 0x0FFF; /* 1 - 54 MBits, includes CCK */
3646 lq_sta
->active_siso_rate
= 0x1FD0; /* 6 - 60 MBits, no 9, no CCK */
3647 lq_sta
->active_mimo2_rate
= 0x1FD0; /* 6 - 60 MBits, no 9, no CCK */
3649 IWL_DEBUG_RATE(mvm
, "sta_id %d rate 0x%X\n",
3650 lq_sta
->lq
.sta_id
, lq_sta
->pers
.dbg_fixed_rate
);
3652 if (lq_sta
->pers
.dbg_fixed_rate
) {
3653 rs_fill_lq_cmd(mvm
, NULL
, lq_sta
, NULL
);
3654 iwl_mvm_send_lq_cmd(lq_sta
->pers
.drv
, &lq_sta
->lq
, false);
3658 static ssize_t
rs_sta_dbgfs_scale_table_write(struct file
*file
,
3659 const char __user
*user_buf
, size_t count
, loff_t
*ppos
)
3661 struct iwl_lq_sta
*lq_sta
= file
->private_data
;
3662 struct iwl_mvm
*mvm
;
3667 mvm
= lq_sta
->pers
.drv
;
3668 memset(buf
, 0, sizeof(buf
));
3669 buf_size
= min(count
, sizeof(buf
) - 1);
3670 if (copy_from_user(buf
, user_buf
, buf_size
))
3673 if (sscanf(buf
, "%x", &parsed_rate
) == 1)
3674 lq_sta
->pers
.dbg_fixed_rate
= parsed_rate
;
3676 lq_sta
->pers
.dbg_fixed_rate
= 0;
3678 rs_program_fix_rate(mvm
, lq_sta
);
3683 static ssize_t
rs_sta_dbgfs_scale_table_read(struct file
*file
,
3684 char __user
*user_buf
, size_t count
, loff_t
*ppos
)
3691 struct iwl_lq_sta
*lq_sta
= file
->private_data
;
3692 struct iwl_mvm_sta
*mvmsta
=
3693 container_of(lq_sta
, struct iwl_mvm_sta
, lq_sta
);
3694 struct iwl_mvm
*mvm
;
3695 struct iwl_scale_tbl_info
*tbl
= &(lq_sta
->lq_info
[lq_sta
->active_tbl
]);
3696 struct rs_rate
*rate
= &tbl
->rate
;
3699 mvm
= lq_sta
->pers
.drv
;
3700 buff
= kmalloc(2048, GFP_KERNEL
);
3704 desc
+= sprintf(buff
+desc
, "sta_id %d\n", lq_sta
->lq
.sta_id
);
3705 desc
+= sprintf(buff
+desc
, "failed=%d success=%d rate=0%lX\n",
3706 lq_sta
->total_failed
, lq_sta
->total_success
,
3707 lq_sta
->active_legacy_rate
);
3708 desc
+= sprintf(buff
+desc
, "fixed rate 0x%X\n",
3709 lq_sta
->pers
.dbg_fixed_rate
);
3710 desc
+= sprintf(buff
+desc
, "valid_tx_ant %s%s%s\n",
3711 (iwl_mvm_get_valid_tx_ant(mvm
) & ANT_A
) ? "ANT_A," : "",
3712 (iwl_mvm_get_valid_tx_ant(mvm
) & ANT_B
) ? "ANT_B," : "",
3713 (iwl_mvm_get_valid_tx_ant(mvm
) & ANT_C
) ? "ANT_C" : "");
3714 desc
+= sprintf(buff
+desc
, "lq type %s\n",
3715 (is_legacy(rate
)) ? "legacy" :
3716 is_vht(rate
) ? "VHT" : "HT");
3717 if (!is_legacy(rate
)) {
3718 desc
+= sprintf(buff
+ desc
, " %s",
3719 (is_siso(rate
)) ? "SISO" : "MIMO2");
3720 desc
+= sprintf(buff
+ desc
, " %s",
3721 (is_ht20(rate
)) ? "20MHz" :
3722 (is_ht40(rate
)) ? "40MHz" :
3723 (is_ht80(rate
)) ? "80MHz" :
3724 (is_ht160(rate
)) ? "160MHz" : "BAD BW");
3725 desc
+= sprintf(buff
+ desc
, " %s %s %s %s\n",
3726 (rate
->sgi
) ? "SGI" : "NGI",
3727 (rate
->ldpc
) ? "LDPC" : "BCC",
3728 (lq_sta
->is_agg
) ? "AGG on" : "",
3729 (mvmsta
->tlc_amsdu
) ? "AMSDU on" : "");
3731 desc
+= sprintf(buff
+desc
, "last tx rate=0x%X\n",
3732 lq_sta
->last_rate_n_flags
);
3733 desc
+= sprintf(buff
+desc
,
3734 "general: flags=0x%X mimo-d=%d s-ant=0x%x d-ant=0x%x\n",
3736 lq_sta
->lq
.mimo_delim
,
3737 lq_sta
->lq
.single_stream_ant_msk
,
3738 lq_sta
->lq
.dual_stream_ant_msk
);
3740 desc
+= sprintf(buff
+desc
,
3741 "agg: time_limit=%d dist_start_th=%d frame_cnt_limit=%d\n",
3742 le16_to_cpu(lq_sta
->lq
.agg_time_limit
),
3743 lq_sta
->lq
.agg_disable_start_th
,
3744 lq_sta
->lq
.agg_frame_cnt_limit
);
3746 desc
+= sprintf(buff
+desc
, "reduced tpc=%d\n", lq_sta
->lq
.reduced_tpc
);
3747 ss_params
= le32_to_cpu(lq_sta
->lq
.ss_params
);
3748 desc
+= sprintf(buff
+desc
, "single stream params: %s%s%s%s\n",
3749 (ss_params
& LQ_SS_PARAMS_VALID
) ?
3750 "VALID" : "INVALID",
3751 (ss_params
& LQ_SS_BFER_ALLOWED
) ?
3753 (ss_params
& LQ_SS_STBC_1SS_ALLOWED
) ?
3755 (ss_params
& LQ_SS_FORCE
) ?
3757 desc
+= sprintf(buff
+desc
,
3758 "Start idx [0]=0x%x [1]=0x%x [2]=0x%x [3]=0x%x\n",
3759 lq_sta
->lq
.initial_rate_index
[0],
3760 lq_sta
->lq
.initial_rate_index
[1],
3761 lq_sta
->lq
.initial_rate_index
[2],
3762 lq_sta
->lq
.initial_rate_index
[3]);
3764 for (i
= 0; i
< LINK_QUAL_MAX_RETRY_NUM
; i
++) {
3765 u32 r
= le32_to_cpu(lq_sta
->lq
.rs_table
[i
]);
3767 desc
+= sprintf(buff
+desc
, " rate[%d] 0x%X ", i
, r
);
3768 desc
+= rs_pretty_print_rate(buff
+desc
, r
);
3771 ret
= simple_read_from_buffer(user_buf
, count
, ppos
, buff
, desc
);
3776 static const struct file_operations rs_sta_dbgfs_scale_table_ops
= {
3777 .write
= rs_sta_dbgfs_scale_table_write
,
3778 .read
= rs_sta_dbgfs_scale_table_read
,
3779 .open
= simple_open
,
3780 .llseek
= default_llseek
,
3782 static ssize_t
rs_sta_dbgfs_stats_table_read(struct file
*file
,
3783 char __user
*user_buf
, size_t count
, loff_t
*ppos
)
3789 struct iwl_scale_tbl_info
*tbl
;
3790 struct rs_rate
*rate
;
3791 struct iwl_lq_sta
*lq_sta
= file
->private_data
;
3793 buff
= kmalloc(1024, GFP_KERNEL
);
3797 for (i
= 0; i
< LQ_SIZE
; i
++) {
3798 tbl
= &(lq_sta
->lq_info
[i
]);
3800 desc
+= sprintf(buff
+desc
,
3801 "%s type=%d SGI=%d BW=%s DUP=0\n"
3803 lq_sta
->active_tbl
== i
? "*" : "x",
3806 is_ht20(rate
) ? "20MHz" :
3807 is_ht40(rate
) ? "40MHz" :
3808 is_ht80(rate
) ? "80MHz" :
3809 is_ht160(rate
) ? "160MHz" : "ERR",
3811 for (j
= 0; j
< IWL_RATE_COUNT
; j
++) {
3812 desc
+= sprintf(buff
+desc
,
3813 "counter=%d success=%d %%=%d\n",
3814 tbl
->win
[j
].counter
,
3815 tbl
->win
[j
].success_counter
,
3816 tbl
->win
[j
].success_ratio
);
3819 ret
= simple_read_from_buffer(user_buf
, count
, ppos
, buff
, desc
);
3824 static const struct file_operations rs_sta_dbgfs_stats_table_ops
= {
3825 .read
= rs_sta_dbgfs_stats_table_read
,
3826 .open
= simple_open
,
3827 .llseek
= default_llseek
,
3830 static ssize_t
rs_sta_dbgfs_drv_tx_stats_read(struct file
*file
,
3831 char __user
*user_buf
,
3832 size_t count
, loff_t
*ppos
)
3834 static const char * const column_name
[] = {
3835 [RS_COLUMN_LEGACY_ANT_A
] = "LEGACY_ANT_A",
3836 [RS_COLUMN_LEGACY_ANT_B
] = "LEGACY_ANT_B",
3837 [RS_COLUMN_SISO_ANT_A
] = "SISO_ANT_A",
3838 [RS_COLUMN_SISO_ANT_B
] = "SISO_ANT_B",
3839 [RS_COLUMN_SISO_ANT_A_SGI
] = "SISO_ANT_A_SGI",
3840 [RS_COLUMN_SISO_ANT_B_SGI
] = "SISO_ANT_B_SGI",
3841 [RS_COLUMN_MIMO2
] = "MIMO2",
3842 [RS_COLUMN_MIMO2_SGI
] = "MIMO2_SGI",
3845 static const char * const rate_name
[] = {
3846 [IWL_RATE_1M_INDEX
] = "1M",
3847 [IWL_RATE_2M_INDEX
] = "2M",
3848 [IWL_RATE_5M_INDEX
] = "5.5M",
3849 [IWL_RATE_11M_INDEX
] = "11M",
3850 [IWL_RATE_6M_INDEX
] = "6M|MCS0",
3851 [IWL_RATE_9M_INDEX
] = "9M",
3852 [IWL_RATE_12M_INDEX
] = "12M|MCS1",
3853 [IWL_RATE_18M_INDEX
] = "18M|MCS2",
3854 [IWL_RATE_24M_INDEX
] = "24M|MCS3",
3855 [IWL_RATE_36M_INDEX
] = "36M|MCS4",
3856 [IWL_RATE_48M_INDEX
] = "48M|MCS5",
3857 [IWL_RATE_54M_INDEX
] = "54M|MCS6",
3858 [IWL_RATE_MCS_7_INDEX
] = "MCS7",
3859 [IWL_RATE_MCS_8_INDEX
] = "MCS8",
3860 [IWL_RATE_MCS_9_INDEX
] = "MCS9",
3863 char *buff
, *pos
, *endpos
;
3866 struct iwl_lq_sta
*lq_sta
= file
->private_data
;
3867 struct rs_rate_stats
*stats
;
3868 static const size_t bufsz
= 1024;
3870 buff
= kmalloc(bufsz
, GFP_KERNEL
);
3875 endpos
= pos
+ bufsz
;
3877 pos
+= scnprintf(pos
, endpos
- pos
, "COLUMN,");
3878 for (rate
= 0; rate
< IWL_RATE_COUNT
; rate
++)
3879 pos
+= scnprintf(pos
, endpos
- pos
, "%s,", rate_name
[rate
]);
3880 pos
+= scnprintf(pos
, endpos
- pos
, "\n");
3882 for (col
= 0; col
< RS_COLUMN_COUNT
; col
++) {
3883 pos
+= scnprintf(pos
, endpos
- pos
,
3884 "%s,", column_name
[col
]);
3886 for (rate
= 0; rate
< IWL_RATE_COUNT
; rate
++) {
3887 stats
= &(lq_sta
->pers
.tx_stats
[col
][rate
]);
3888 pos
+= scnprintf(pos
, endpos
- pos
,
3893 pos
+= scnprintf(pos
, endpos
- pos
, "\n");
3896 ret
= simple_read_from_buffer(user_buf
, count
, ppos
, buff
, pos
- buff
);
3901 static ssize_t
rs_sta_dbgfs_drv_tx_stats_write(struct file
*file
,
3902 const char __user
*user_buf
,
3903 size_t count
, loff_t
*ppos
)
3905 struct iwl_lq_sta
*lq_sta
= file
->private_data
;
3906 memset(lq_sta
->pers
.tx_stats
, 0, sizeof(lq_sta
->pers
.tx_stats
));
3911 static const struct file_operations rs_sta_dbgfs_drv_tx_stats_ops
= {
3912 .read
= rs_sta_dbgfs_drv_tx_stats_read
,
3913 .write
= rs_sta_dbgfs_drv_tx_stats_write
,
3914 .open
= simple_open
,
3915 .llseek
= default_llseek
,
3918 static ssize_t
iwl_dbgfs_ss_force_read(struct file
*file
,
3919 char __user
*user_buf
,
3920 size_t count
, loff_t
*ppos
)
3922 struct iwl_lq_sta
*lq_sta
= file
->private_data
;
3924 int bufsz
= sizeof(buf
);
3926 static const char * const ss_force_name
[] = {
3927 [RS_SS_FORCE_NONE
] = "none",
3928 [RS_SS_FORCE_STBC
] = "stbc",
3929 [RS_SS_FORCE_BFER
] = "bfer",
3930 [RS_SS_FORCE_SISO
] = "siso",
3933 pos
+= scnprintf(buf
+pos
, bufsz
-pos
, "%s\n",
3934 ss_force_name
[lq_sta
->pers
.ss_force
]);
3935 return simple_read_from_buffer(user_buf
, count
, ppos
, buf
, pos
);
3938 static ssize_t
iwl_dbgfs_ss_force_write(struct iwl_lq_sta
*lq_sta
, char *buf
,
3939 size_t count
, loff_t
*ppos
)
3941 struct iwl_mvm
*mvm
= lq_sta
->pers
.drv
;
3944 if (!strncmp("none", buf
, 4)) {
3945 lq_sta
->pers
.ss_force
= RS_SS_FORCE_NONE
;
3946 } else if (!strncmp("siso", buf
, 4)) {
3947 lq_sta
->pers
.ss_force
= RS_SS_FORCE_SISO
;
3948 } else if (!strncmp("stbc", buf
, 4)) {
3949 if (lq_sta
->stbc_capable
) {
3950 lq_sta
->pers
.ss_force
= RS_SS_FORCE_STBC
;
3953 "can't force STBC. peer doesn't support\n");
3956 } else if (!strncmp("bfer", buf
, 4)) {
3957 if (lq_sta
->bfer_capable
) {
3958 lq_sta
->pers
.ss_force
= RS_SS_FORCE_BFER
;
3961 "can't force BFER. peer doesn't support\n");
3965 IWL_ERR(mvm
, "valid values none|siso|stbc|bfer\n");
3968 return ret
?: count
;
3971 #define MVM_DEBUGFS_READ_WRITE_FILE_OPS(name, bufsz) \
3972 _MVM_DEBUGFS_READ_WRITE_FILE_OPS(name, bufsz, struct iwl_lq_sta)
3973 #define MVM_DEBUGFS_ADD_FILE_RS(name, parent, mode) do { \
3974 if (!debugfs_create_file(#name, mode, parent, lq_sta, \
3975 &iwl_dbgfs_##name##_ops)) \
3979 MVM_DEBUGFS_READ_WRITE_FILE_OPS(ss_force
, 32);
3981 static void rs_add_debugfs(void *mvm
, void *priv_sta
, struct dentry
*dir
)
3983 struct iwl_lq_sta
*lq_sta
= priv_sta
;
3984 struct iwl_mvm_sta
*mvmsta
;
3986 mvmsta
= container_of(lq_sta
, struct iwl_mvm_sta
, lq_sta
);
3991 debugfs_create_file("rate_scale_table", S_IRUSR
| S_IWUSR
, dir
,
3992 lq_sta
, &rs_sta_dbgfs_scale_table_ops
);
3993 debugfs_create_file("rate_stats_table", S_IRUSR
, dir
,
3994 lq_sta
, &rs_sta_dbgfs_stats_table_ops
);
3995 debugfs_create_file("drv_tx_stats", S_IRUSR
| S_IWUSR
, dir
,
3996 lq_sta
, &rs_sta_dbgfs_drv_tx_stats_ops
);
3997 debugfs_create_u8("tx_agg_tid_enable", S_IRUSR
| S_IWUSR
, dir
,
3998 &lq_sta
->tx_agg_tid_en
);
3999 debugfs_create_u8("reduced_tpc", S_IRUSR
| S_IWUSR
, dir
,
4000 &lq_sta
->pers
.dbg_fixed_txp_reduction
);
4002 MVM_DEBUGFS_ADD_FILE_RS(ss_force
, dir
, S_IRUSR
| S_IWUSR
);
4005 IWL_ERR((struct iwl_mvm
*)mvm
, "Can't create debugfs entity\n");
4008 static void rs_remove_debugfs(void *mvm
, void *mvm_sta
)
4014 * Initialization of rate scaling information is done by driver after
4015 * the station is added. Since mac80211 calls this function before a
4016 * station is added we ignore it.
4018 static void rs_rate_init_stub(void *mvm_r
,
4019 struct ieee80211_supported_band
*sband
,
4020 struct cfg80211_chan_def
*chandef
,
4021 struct ieee80211_sta
*sta
, void *mvm_sta
)
4025 static const struct rate_control_ops rs_mvm_ops
= {
4027 .tx_status
= rs_mac80211_tx_status
,
4028 .get_rate
= rs_get_rate
,
4029 .rate_init
= rs_rate_init_stub
,
4032 .alloc_sta
= rs_alloc_sta
,
4033 .free_sta
= rs_free_sta
,
4034 .rate_update
= rs_rate_update
,
4035 #ifdef CONFIG_MAC80211_DEBUGFS
4036 .add_sta_debugfs
= rs_add_debugfs
,
4037 .remove_sta_debugfs
= rs_remove_debugfs
,
4041 int iwl_mvm_rate_control_register(void)
4043 return ieee80211_rate_control_register(&rs_mvm_ops
);
4046 void iwl_mvm_rate_control_unregister(void)
4048 ieee80211_rate_control_unregister(&rs_mvm_ops
);
4052 * iwl_mvm_tx_protection - Gets LQ command, change it to enable/disable
4053 * Tx protection, according to this request and previous requests,
4054 * and send the LQ command.
4055 * @mvmsta: The station
4056 * @enable: Enable Tx protection?
4058 int iwl_mvm_tx_protection(struct iwl_mvm
*mvm
, struct iwl_mvm_sta
*mvmsta
,
4061 struct iwl_lq_cmd
*lq
= &mvmsta
->lq_sta
.lq
;
4063 lockdep_assert_held(&mvm
->mutex
);
4066 if (mvmsta
->tx_protection
== 0)
4067 lq
->flags
|= LQ_FLAG_USE_RTS_MSK
;
4068 mvmsta
->tx_protection
++;
4070 mvmsta
->tx_protection
--;
4071 if (mvmsta
->tx_protection
== 0)
4072 lq
->flags
&= ~LQ_FLAG_USE_RTS_MSK
;
4075 return iwl_mvm_send_lq_cmd(mvm
, lq
, false);