1 /******************************************************************************
3 * Copyright(c) 2005 - 2013 Intel Corporation. All rights reserved.
5 * This program is free software; you can redistribute it and/or modify it
6 * under the terms of version 2 of the GNU General Public License as
7 * published by the Free Software Foundation.
9 * This program is distributed in the hope that it will be useful, but WITHOUT
10 * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
11 * FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License for
14 * You should have received a copy of the GNU General Public License along with
15 * this program; if not, write to the Free Software Foundation, Inc.,
16 * 51 Franklin Street, Fifth Floor, Boston, MA 02110, USA
18 * The full GNU General Public License is included in this distribution in the
19 * file called LICENSE.
21 * Contact Information:
22 * Intel Linux Wireless <ilw@linux.intel.com>
23 * Intel Corporation, 5200 N.E. Elam Young Parkway, Hillsboro, OR 97124-6497
25 *****************************************************************************/
26 #include <linux/kernel.h>
27 #include <linux/init.h>
28 #include <linux/skbuff.h>
29 #include <linux/slab.h>
30 #include <net/mac80211.h>
32 #include <linux/netdevice.h>
33 #include <linux/etherdevice.h>
34 #include <linux/delay.h>
36 #include <linux/workqueue.h>
40 #include "iwl-op-mode.h"
43 #define RS_NAME "iwl-mvm-rs"
45 #define NUM_TRY_BEFORE_ANT_TOGGLE 1
46 #define IWL_NUMBER_TRY 1
47 #define IWL_HT_NUMBER_TRY 3
49 #define IWL_RATE_MAX_WINDOW 62 /* # tx in history window */
50 #define IWL_RATE_MIN_FAILURE_TH 6 /* min failures to calc tpt */
51 #define IWL_RATE_MIN_SUCCESS_TH 8 /* min successes to calc tpt */
53 /* max allowed rate miss before sync LQ cmd */
54 #define IWL_MISSED_RATE_MAX 15
55 /* max time to accum history 2 seconds */
56 #define IWL_RATE_SCALE_FLUSH_INTVL (3*HZ)
58 static u8 rs_ht_to_legacy
[] = {
59 IWL_RATE_6M_INDEX
, IWL_RATE_6M_INDEX
,
60 IWL_RATE_6M_INDEX
, IWL_RATE_6M_INDEX
,
62 IWL_RATE_6M_INDEX
, IWL_RATE_9M_INDEX
,
63 IWL_RATE_12M_INDEX
, IWL_RATE_18M_INDEX
,
64 IWL_RATE_24M_INDEX
, IWL_RATE_36M_INDEX
,
65 IWL_RATE_48M_INDEX
, IWL_RATE_54M_INDEX
68 static const u8 ant_toggle_lookup
[] = {
69 /*ANT_NONE -> */ ANT_NONE
,
72 /*ANT_AB -> */ ANT_BC
,
74 /*ANT_AC -> */ ANT_AB
,
75 /*ANT_BC -> */ ANT_AC
,
76 /*ANT_ABC -> */ ANT_ABC
,
79 #define IWL_DECLARE_RATE_INFO(r, s, ip, in, rp, rn, pp, np) \
80 [IWL_RATE_##r##M_INDEX] = { IWL_RATE_##r##M_PLCP, \
81 IWL_RATE_SISO_##s##M_PLCP, \
82 IWL_RATE_MIMO2_##s##M_PLCP,\
83 IWL_RATE_MIMO3_##s##M_PLCP,\
84 IWL_RATE_##r##M_IEEE, \
85 IWL_RATE_##ip##M_INDEX, \
86 IWL_RATE_##in##M_INDEX, \
87 IWL_RATE_##rp##M_INDEX, \
88 IWL_RATE_##rn##M_INDEX, \
89 IWL_RATE_##pp##M_INDEX, \
90 IWL_RATE_##np##M_INDEX }
94 * rate, ht rate, prev rate, next rate, prev tgg rate, next tgg rate
96 * If there isn't a valid next or previous rate then INV is used which
97 * maps to IWL_RATE_INVALID
100 static const struct iwl_rs_rate_info iwl_rates
[IWL_RATE_COUNT
] = {
101 IWL_DECLARE_RATE_INFO(1, INV
, INV
, 2, INV
, 2, INV
, 2), /* 1mbps */
102 IWL_DECLARE_RATE_INFO(2, INV
, 1, 5, 1, 5, 1, 5), /* 2mbps */
103 IWL_DECLARE_RATE_INFO(5, INV
, 2, 6, 2, 11, 2, 11), /*5.5mbps */
104 IWL_DECLARE_RATE_INFO(11, INV
, 9, 12, 9, 12, 5, 18), /* 11mbps */
105 IWL_DECLARE_RATE_INFO(6, 6, 5, 9, 5, 11, 5, 11), /* 6mbps */
106 IWL_DECLARE_RATE_INFO(9, 6, 6, 11, 6, 11, 5, 11), /* 9mbps */
107 IWL_DECLARE_RATE_INFO(12, 12, 11, 18, 11, 18, 11, 18), /* 12mbps */
108 IWL_DECLARE_RATE_INFO(18, 18, 12, 24, 12, 24, 11, 24), /* 18mbps */
109 IWL_DECLARE_RATE_INFO(24, 24, 18, 36, 18, 36, 18, 36), /* 24mbps */
110 IWL_DECLARE_RATE_INFO(36, 36, 24, 48, 24, 48, 24, 48), /* 36mbps */
111 IWL_DECLARE_RATE_INFO(48, 48, 36, 54, 36, 54, 36, 54), /* 48mbps */
112 IWL_DECLARE_RATE_INFO(54, 54, 48, INV
, 48, INV
, 48, INV
),/* 54mbps */
113 IWL_DECLARE_RATE_INFO(60, 60, 48, INV
, 48, INV
, 48, INV
),/* 60mbps */
114 /* FIXME:RS: ^^ should be INV (legacy) */
117 static inline u8
rs_extract_rate(u32 rate_n_flags
)
119 /* also works for HT because bits 7:6 are zero there */
120 return (u8
)(rate_n_flags
& RATE_LEGACY_RATE_MSK
);
123 static int iwl_hwrate_to_plcp_idx(u32 rate_n_flags
)
128 if (rate_n_flags
& RATE_MCS_HT_MSK
) {
129 idx
= rs_extract_rate(rate_n_flags
);
131 if (idx
>= IWL_RATE_MIMO3_6M_PLCP
)
132 idx
= idx
- IWL_RATE_MIMO3_6M_PLCP
;
133 else if (idx
>= IWL_RATE_MIMO2_6M_PLCP
)
134 idx
= idx
- IWL_RATE_MIMO2_6M_PLCP
;
136 idx
+= IWL_FIRST_OFDM_RATE
;
137 /* skip 9M not supported in ht*/
138 if (idx
>= IWL_RATE_9M_INDEX
)
140 if ((idx
>= IWL_FIRST_OFDM_RATE
) && (idx
<= IWL_LAST_OFDM_RATE
))
143 /* legacy rate format, search for match in table */
145 for (idx
= 0; idx
< ARRAY_SIZE(iwl_rates
); idx
++)
146 if (iwl_rates
[idx
].plcp
==
147 rs_extract_rate(rate_n_flags
))
154 static void rs_rate_scale_perform(struct iwl_mvm
*mvm
,
156 struct ieee80211_sta
*sta
,
157 struct iwl_lq_sta
*lq_sta
);
158 static void rs_fill_link_cmd(struct iwl_mvm
*mvm
,
159 struct iwl_lq_sta
*lq_sta
, u32 rate_n_flags
);
160 static void rs_stay_in_table(struct iwl_lq_sta
*lq_sta
, bool force_search
);
163 #ifdef CONFIG_MAC80211_DEBUGFS
164 static void rs_dbgfs_set_mcs(struct iwl_lq_sta
*lq_sta
,
165 u32
*rate_n_flags
, int index
);
167 static void rs_dbgfs_set_mcs(struct iwl_lq_sta
*lq_sta
,
168 u32
*rate_n_flags
, int index
)
173 * The following tables contain the expected throughput metrics for all rates
175 * 1, 2, 5.5, 11, 6, 9, 12, 18, 24, 36, 48, 54, 60 MBits
177 * where invalid entries are zeros.
179 * CCK rates are only valid in legacy table and will only be used in G
183 static s32 expected_tpt_legacy
[IWL_RATE_COUNT
] = {
184 7, 13, 35, 58, 40, 57, 72, 98, 121, 154, 177, 186, 0
187 static s32 expected_tpt_siso20MHz
[4][IWL_RATE_COUNT
] = {
188 {0, 0, 0, 0, 42, 0, 76, 102, 124, 159, 183, 193, 202}, /* Norm */
189 {0, 0, 0, 0, 46, 0, 82, 110, 132, 168, 192, 202, 210}, /* SGI */
190 {0, 0, 0, 0, 47, 0, 91, 133, 171, 242, 305, 334, 362}, /* AGG */
191 {0, 0, 0, 0, 52, 0, 101, 145, 187, 264, 330, 361, 390}, /* AGG+SGI */
194 static s32 expected_tpt_siso40MHz
[4][IWL_RATE_COUNT
] = {
195 {0, 0, 0, 0, 77, 0, 127, 160, 184, 220, 242, 250, 257}, /* Norm */
196 {0, 0, 0, 0, 83, 0, 135, 169, 193, 229, 250, 257, 264}, /* SGI */
197 {0, 0, 0, 0, 94, 0, 177, 249, 313, 423, 512, 550, 586}, /* AGG */
198 {0, 0, 0, 0, 104, 0, 193, 270, 338, 454, 545, 584, 620}, /* AGG+SGI */
201 static s32 expected_tpt_mimo2_20MHz
[4][IWL_RATE_COUNT
] = {
202 {0, 0, 0, 0, 74, 0, 123, 155, 179, 214, 236, 244, 251}, /* Norm */
203 {0, 0, 0, 0, 81, 0, 131, 164, 188, 223, 243, 251, 257}, /* SGI */
204 {0, 0, 0, 0, 89, 0, 167, 235, 296, 402, 488, 526, 560}, /* AGG */
205 {0, 0, 0, 0, 97, 0, 182, 255, 320, 431, 520, 558, 593}, /* AGG+SGI*/
208 static s32 expected_tpt_mimo2_40MHz
[4][IWL_RATE_COUNT
] = {
209 {0, 0, 0, 0, 123, 0, 182, 214, 235, 264, 279, 285, 289}, /* Norm */
210 {0, 0, 0, 0, 131, 0, 191, 222, 242, 270, 284, 289, 293}, /* SGI */
211 {0, 0, 0, 0, 171, 0, 305, 410, 496, 634, 731, 771, 805}, /* AGG */
212 {0, 0, 0, 0, 186, 0, 329, 439, 527, 667, 764, 803, 838}, /* AGG+SGI */
215 static s32 expected_tpt_mimo3_20MHz
[4][IWL_RATE_COUNT
] = {
216 {0, 0, 0, 0, 99, 0, 153, 186, 208, 239, 256, 263, 268}, /* Norm */
217 {0, 0, 0, 0, 106, 0, 162, 194, 215, 246, 262, 268, 273}, /* SGI */
218 {0, 0, 0, 0, 134, 0, 249, 346, 431, 574, 685, 732, 775}, /* AGG */
219 {0, 0, 0, 0, 148, 0, 272, 376, 465, 614, 727, 775, 818}, /* AGG+SGI */
222 static s32 expected_tpt_mimo3_40MHz
[4][IWL_RATE_COUNT
] = {
223 {0, 0, 0, 0, 152, 0, 211, 239, 255, 279, 290, 294, 297}, /* Norm */
224 {0, 0, 0, 0, 160, 0, 219, 245, 261, 284, 294, 297, 300}, /* SGI */
225 {0, 0, 0, 0, 254, 0, 443, 584, 695, 868, 984, 1030, 1070}, /* AGG */
226 {0, 0, 0, 0, 277, 0, 478, 624, 737, 911, 1026, 1070, 1109}, /* AGG+SGI */
230 static const struct iwl_rate_mcs_info iwl_rate_mcs
[IWL_RATE_COUNT
] = {
239 { "24", "16QAM 1/2"},
240 { "36", "16QAM 3/4"},
241 { "48", "64QAM 2/3"},
242 { "54", "64QAM 3/4"},
243 { "60", "64QAM 5/6"},
246 #define MCS_INDEX_PER_STREAM (8)
248 static void rs_rate_scale_clear_window(struct iwl_rate_scale_data
*window
)
251 window
->success_counter
= 0;
252 window
->success_ratio
= IWL_INVALID_VALUE
;
254 window
->average_tpt
= IWL_INVALID_VALUE
;
258 static inline u8
rs_is_valid_ant(u8 valid_antenna
, u8 ant_type
)
260 return (ant_type
& valid_antenna
) == ant_type
;
264 * removes the old data from the statistics. All data that is older than
265 * TID_MAX_TIME_DIFF, will be deleted.
267 static void rs_tl_rm_old_stats(struct iwl_traffic_load
*tl
, u32 curr_time
)
269 /* The oldest age we want to keep */
270 u32 oldest_time
= curr_time
- TID_MAX_TIME_DIFF
;
272 while (tl
->queue_count
&&
273 (tl
->time_stamp
< oldest_time
)) {
274 tl
->total
-= tl
->packet_count
[tl
->head
];
275 tl
->packet_count
[tl
->head
] = 0;
276 tl
->time_stamp
+= TID_QUEUE_CELL_SPACING
;
279 if (tl
->head
>= TID_QUEUE_MAX_SIZE
)
285 * increment traffic load value for tid and also remove
286 * any old values if passed the certain time period
288 static u8
rs_tl_add_packet(struct iwl_lq_sta
*lq_data
,
289 struct ieee80211_hdr
*hdr
)
291 u32 curr_time
= jiffies_to_msecs(jiffies
);
294 struct iwl_traffic_load
*tl
= NULL
;
297 if (ieee80211_is_data_qos(hdr
->frame_control
)) {
298 u8
*qc
= ieee80211_get_qos_ctl(hdr
);
301 return IWL_MAX_TID_COUNT
;
304 if (unlikely(tid
>= IWL_MAX_TID_COUNT
))
305 return IWL_MAX_TID_COUNT
;
307 tl
= &lq_data
->load
[tid
];
309 curr_time
-= curr_time
% TID_ROUND_VALUE
;
311 /* Happens only for the first packet. Initialize the data */
312 if (!(tl
->queue_count
)) {
314 tl
->time_stamp
= curr_time
;
317 tl
->packet_count
[0] = 1;
318 return IWL_MAX_TID_COUNT
;
321 time_diff
= TIME_WRAP_AROUND(tl
->time_stamp
, curr_time
);
322 index
= time_diff
/ TID_QUEUE_CELL_SPACING
;
324 /* The history is too long: remove data that is older than */
325 /* TID_MAX_TIME_DIFF */
326 if (index
>= TID_QUEUE_MAX_SIZE
)
327 rs_tl_rm_old_stats(tl
, curr_time
);
329 index
= (tl
->head
+ index
) % TID_QUEUE_MAX_SIZE
;
330 tl
->packet_count
[index
] = tl
->packet_count
[index
] + 1;
331 tl
->total
= tl
->total
+ 1;
333 if ((index
+ 1) > tl
->queue_count
)
334 tl
->queue_count
= index
+ 1;
339 #ifdef CONFIG_MAC80211_DEBUGFS
341 * Program the device to use fixed rate for frame transmit
342 * This is for debugging/testing only
343 * once the device start use fixed rate, we need to reload the module
344 * to being back the normal operation.
346 static void rs_program_fix_rate(struct iwl_mvm
*mvm
,
347 struct iwl_lq_sta
*lq_sta
)
349 lq_sta
->active_legacy_rate
= 0x0FFF; /* 1 - 54 MBits, includes CCK */
350 lq_sta
->active_siso_rate
= 0x1FD0; /* 6 - 60 MBits, no 9, no CCK */
351 lq_sta
->active_mimo2_rate
= 0x1FD0; /* 6 - 60 MBits, no 9, no CCK */
352 lq_sta
->active_mimo3_rate
= 0x1FD0; /* 6 - 60 MBits, no 9, no CCK */
354 IWL_DEBUG_RATE(mvm
, "sta_id %d rate 0x%X\n",
355 lq_sta
->lq
.sta_id
, lq_sta
->dbg_fixed_rate
);
357 if (lq_sta
->dbg_fixed_rate
) {
358 rs_fill_link_cmd(NULL
, lq_sta
, lq_sta
->dbg_fixed_rate
);
359 iwl_mvm_send_lq_cmd(lq_sta
->drv
, &lq_sta
->lq
, CMD_ASYNC
, false);
365 get the traffic load value for tid
367 static u32
rs_tl_get_load(struct iwl_lq_sta
*lq_data
, u8 tid
)
369 u32 curr_time
= jiffies_to_msecs(jiffies
);
372 struct iwl_traffic_load
*tl
= NULL
;
374 if (tid
>= IWL_MAX_TID_COUNT
)
377 tl
= &(lq_data
->load
[tid
]);
379 curr_time
-= curr_time
% TID_ROUND_VALUE
;
381 if (!(tl
->queue_count
))
384 time_diff
= TIME_WRAP_AROUND(tl
->time_stamp
, curr_time
);
385 index
= time_diff
/ TID_QUEUE_CELL_SPACING
;
387 /* The history is too long: remove data that is older than */
388 /* TID_MAX_TIME_DIFF */
389 if (index
>= TID_QUEUE_MAX_SIZE
)
390 rs_tl_rm_old_stats(tl
, curr_time
);
395 static int rs_tl_turn_on_agg_for_tid(struct iwl_mvm
*mvm
,
396 struct iwl_lq_sta
*lq_data
, u8 tid
,
397 struct ieee80211_sta
*sta
)
402 load
= rs_tl_get_load(lq_data
, tid
);
404 if ((iwlwifi_mod_params
.auto_agg
) || (load
> IWL_AGG_LOAD_THRESHOLD
)) {
405 IWL_DEBUG_HT(mvm
, "Starting Tx agg: STA: %pM tid: %d\n",
407 ret
= ieee80211_start_tx_ba_session(sta
, tid
, 5000);
408 if (ret
== -EAGAIN
) {
410 * driver and mac80211 is out of sync
411 * this might be cause by reloading firmware
412 * stop the tx ba session here
414 IWL_ERR(mvm
, "Fail start Tx agg on tid: %d\n",
416 ieee80211_stop_tx_ba_session(sta
, tid
);
420 "Aggregation not enabled for tid %d because load = %u\n",
426 static void rs_tl_turn_on_agg(struct iwl_mvm
*mvm
, u8 tid
,
427 struct iwl_lq_sta
*lq_data
,
428 struct ieee80211_sta
*sta
)
430 if (tid
< IWL_MAX_TID_COUNT
)
431 rs_tl_turn_on_agg_for_tid(mvm
, lq_data
, tid
, sta
);
433 IWL_ERR(mvm
, "tid exceeds max TID count: %d/%d\n",
434 tid
, IWL_MAX_TID_COUNT
);
437 static inline int get_num_of_ant_from_rate(u32 rate_n_flags
)
439 return !!(rate_n_flags
& RATE_MCS_ANT_A_MSK
) +
440 !!(rate_n_flags
& RATE_MCS_ANT_B_MSK
) +
441 !!(rate_n_flags
& RATE_MCS_ANT_C_MSK
);
445 * Static function to get the expected throughput from an iwl_scale_tbl_info
446 * that wraps a NULL pointer check
448 static s32
get_expected_tpt(struct iwl_scale_tbl_info
*tbl
, int rs_index
)
450 if (tbl
->expected_tpt
)
451 return tbl
->expected_tpt
[rs_index
];
456 * rs_collect_tx_data - Update the success/failure sliding window
458 * We keep a sliding window of the last 62 packets transmitted
459 * at this rate. window->data contains the bitmask of successful
462 static int rs_collect_tx_data(struct iwl_scale_tbl_info
*tbl
,
463 int scale_index
, int attempts
, int successes
)
465 struct iwl_rate_scale_data
*window
= NULL
;
466 static const u64 mask
= (((u64
)1) << (IWL_RATE_MAX_WINDOW
- 1));
469 if (scale_index
< 0 || scale_index
>= IWL_RATE_COUNT
)
472 /* Select window for current tx bit rate */
473 window
= &(tbl
->win
[scale_index
]);
475 /* Get expected throughput */
476 tpt
= get_expected_tpt(tbl
, scale_index
);
479 * Keep track of only the latest 62 tx frame attempts in this rate's
480 * history window; anything older isn't really relevant any more.
481 * If we have filled up the sliding window, drop the oldest attempt;
482 * if the oldest attempt (highest bit in bitmap) shows "success",
483 * subtract "1" from the success counter (this is the main reason
484 * we keep these bitmaps!).
486 while (attempts
> 0) {
487 if (window
->counter
>= IWL_RATE_MAX_WINDOW
) {
488 /* remove earliest */
489 window
->counter
= IWL_RATE_MAX_WINDOW
- 1;
491 if (window
->data
& mask
) {
492 window
->data
&= ~mask
;
493 window
->success_counter
--;
497 /* Increment frames-attempted counter */
500 /* Shift bitmap by one frame to throw away oldest history */
503 /* Mark the most recent #successes attempts as successful */
505 window
->success_counter
++;
513 /* Calculate current success ratio, avoid divide-by-0! */
514 if (window
->counter
> 0)
515 window
->success_ratio
= 128 * (100 * window
->success_counter
)
518 window
->success_ratio
= IWL_INVALID_VALUE
;
520 fail_count
= window
->counter
- window
->success_counter
;
522 /* Calculate average throughput, if we have enough history. */
523 if ((fail_count
>= IWL_RATE_MIN_FAILURE_TH
) ||
524 (window
->success_counter
>= IWL_RATE_MIN_SUCCESS_TH
))
525 window
->average_tpt
= (window
->success_ratio
* tpt
+ 64) / 128;
527 window
->average_tpt
= IWL_INVALID_VALUE
;
529 /* Tag this window as having been updated */
530 window
->stamp
= jiffies
;
536 * Fill uCode API rate_n_flags field, based on "search" or "active" table.
538 /* FIXME:RS:remove this function and put the flags statically in the table */
539 static u32
rate_n_flags_from_tbl(struct iwl_mvm
*mvm
,
540 struct iwl_scale_tbl_info
*tbl
,
541 int index
, u8 use_green
)
543 u32 rate_n_flags
= 0;
545 if (is_legacy(tbl
->lq_type
)) {
546 rate_n_flags
= iwl_rates
[index
].plcp
;
547 if (index
>= IWL_FIRST_CCK_RATE
&& index
<= IWL_LAST_CCK_RATE
)
548 rate_n_flags
|= RATE_MCS_CCK_MSK
;
549 } else if (is_Ht(tbl
->lq_type
)) {
550 if (index
> IWL_LAST_OFDM_RATE
) {
551 IWL_ERR(mvm
, "Invalid HT rate index %d\n", index
);
552 index
= IWL_LAST_OFDM_RATE
;
554 rate_n_flags
= RATE_MCS_HT_MSK
;
556 if (is_siso(tbl
->lq_type
))
557 rate_n_flags
|= iwl_rates
[index
].plcp_siso
;
558 else if (is_mimo2(tbl
->lq_type
))
559 rate_n_flags
|= iwl_rates
[index
].plcp_mimo2
;
561 rate_n_flags
|= iwl_rates
[index
].plcp_mimo3
;
563 IWL_ERR(mvm
, "Invalid tbl->lq_type %d\n", tbl
->lq_type
);
566 rate_n_flags
|= ((tbl
->ant_type
<< RATE_MCS_ANT_POS
) &
567 RATE_MCS_ANT_ABC_MSK
);
569 if (is_Ht(tbl
->lq_type
)) {
571 rate_n_flags
|= RATE_MCS_CHAN_WIDTH_40
;
573 rate_n_flags
|= RATE_MCS_SGI_MSK
;
576 rate_n_flags
|= RATE_HT_MCS_GF_MSK
;
577 if (is_siso(tbl
->lq_type
) && tbl
->is_SGI
) {
578 rate_n_flags
&= ~RATE_MCS_SGI_MSK
;
579 IWL_ERR(mvm
, "GF was set with SGI:SISO\n");
587 * Interpret uCode API's rate_n_flags format,
588 * fill "search" or "active" tx mode table.
590 static int rs_get_tbl_info_from_mcs(const u32 rate_n_flags
,
591 enum ieee80211_band band
,
592 struct iwl_scale_tbl_info
*tbl
,
595 u32 ant_msk
= (rate_n_flags
& RATE_MCS_ANT_ABC_MSK
);
596 u8 num_of_ant
= get_num_of_ant_from_rate(rate_n_flags
);
599 memset(tbl
, 0, sizeof(struct iwl_scale_tbl_info
));
600 *rate_idx
= iwl_hwrate_to_plcp_idx(rate_n_flags
);
602 if (*rate_idx
== IWL_RATE_INVALID
) {
606 tbl
->is_SGI
= 0; /* default legacy setup */
608 tbl
->ant_type
= (ant_msk
>> RATE_MCS_ANT_POS
);
609 tbl
->lq_type
= LQ_NONE
;
610 tbl
->max_search
= IWL_MAX_SEARCH
;
612 /* legacy rate format */
613 if (!(rate_n_flags
& RATE_MCS_HT_MSK
)) {
614 if (num_of_ant
== 1) {
615 if (band
== IEEE80211_BAND_5GHZ
)
622 if (rate_n_flags
& RATE_MCS_SGI_MSK
)
625 if (rate_n_flags
& RATE_MCS_CHAN_WIDTH_40
) /* TODO */
628 mcs
= rs_extract_rate(rate_n_flags
);
631 if (mcs
<= IWL_RATE_SISO_60M_PLCP
) {
633 tbl
->lq_type
= LQ_SISO
; /*else NONE*/
635 } else if (mcs
<= IWL_RATE_MIMO2_60M_PLCP
) {
637 tbl
->lq_type
= LQ_MIMO2
;
640 if (num_of_ant
== 3) {
641 tbl
->max_search
= IWL_MAX_11N_MIMO3_SEARCH
;
642 tbl
->lq_type
= LQ_MIMO3
;
649 /* switch to another antenna/antennas and return 1 */
650 /* if no other valid antenna found, return 0 */
651 static int rs_toggle_antenna(u32 valid_ant
, u32
*rate_n_flags
,
652 struct iwl_scale_tbl_info
*tbl
)
656 if (!tbl
->ant_type
|| tbl
->ant_type
> ANT_ABC
)
659 if (!rs_is_valid_ant(valid_ant
, tbl
->ant_type
))
662 new_ant_type
= ant_toggle_lookup
[tbl
->ant_type
];
664 while ((new_ant_type
!= tbl
->ant_type
) &&
665 !rs_is_valid_ant(valid_ant
, new_ant_type
))
666 new_ant_type
= ant_toggle_lookup
[new_ant_type
];
668 if (new_ant_type
== tbl
->ant_type
)
671 tbl
->ant_type
= new_ant_type
;
672 *rate_n_flags
&= ~RATE_MCS_ANT_ABC_MSK
;
673 *rate_n_flags
|= new_ant_type
<< RATE_MCS_ANT_POS
;
678 * Green-field mode is valid if the station supports it and
679 * there are no non-GF stations present in the BSS.
681 static bool rs_use_green(struct ieee80211_sta
*sta
)
683 struct iwl_mvm_sta
*sta_priv
= (void *)sta
->drv_priv
;
685 bool use_green
= !(sta_priv
->vif
->bss_conf
.ht_operation_mode
&
686 IEEE80211_HT_OP_MODE_NON_GF_STA_PRSNT
);
688 return (sta
->ht_cap
.cap
& IEEE80211_HT_CAP_GRN_FLD
) && use_green
;
692 * rs_get_supported_rates - get the available rates
694 * if management frame or broadcast frame only return
695 * basic available rates.
698 static u16
rs_get_supported_rates(struct iwl_lq_sta
*lq_sta
,
699 struct ieee80211_hdr
*hdr
,
700 enum iwl_table_type rate_type
)
702 if (is_legacy(rate_type
)) {
703 return lq_sta
->active_legacy_rate
;
705 if (is_siso(rate_type
))
706 return lq_sta
->active_siso_rate
;
707 else if (is_mimo2(rate_type
))
708 return lq_sta
->active_mimo2_rate
;
710 return lq_sta
->active_mimo3_rate
;
714 static u16
rs_get_adjacent_rate(struct iwl_mvm
*mvm
, u8 index
, u16 rate_mask
,
717 u8 high
= IWL_RATE_INVALID
;
718 u8 low
= IWL_RATE_INVALID
;
720 /* 802.11A or ht walks to the next literal adjacent rate in
722 if (is_a_band(rate_type
) || !is_legacy(rate_type
)) {
726 /* Find the previous rate that is in the rate mask */
728 for (mask
= (1 << i
); i
>= 0; i
--, mask
>>= 1) {
729 if (rate_mask
& mask
) {
735 /* Find the next rate that is in the rate mask */
737 for (mask
= (1 << i
); i
< IWL_RATE_COUNT
; i
++, mask
<<= 1) {
738 if (rate_mask
& mask
) {
744 return (high
<< 8) | low
;
748 while (low
!= IWL_RATE_INVALID
) {
749 low
= iwl_rates
[low
].prev_rs
;
750 if (low
== IWL_RATE_INVALID
)
752 if (rate_mask
& (1 << low
))
754 IWL_DEBUG_RATE(mvm
, "Skipping masked lower rate: %d\n", low
);
758 while (high
!= IWL_RATE_INVALID
) {
759 high
= iwl_rates
[high
].next_rs
;
760 if (high
== IWL_RATE_INVALID
)
762 if (rate_mask
& (1 << high
))
764 IWL_DEBUG_RATE(mvm
, "Skipping masked higher rate: %d\n", high
);
767 return (high
<< 8) | low
;
770 static u32
rs_get_lower_rate(struct iwl_lq_sta
*lq_sta
,
771 struct iwl_scale_tbl_info
*tbl
,
772 u8 scale_index
, u8 ht_possible
)
777 u8 switch_to_legacy
= 0;
778 u8 is_green
= lq_sta
->is_green
;
779 struct iwl_mvm
*mvm
= lq_sta
->drv
;
781 /* check if we need to switch from HT to legacy rates.
782 * assumption is that mandatory rates (1Mbps or 6Mbps)
783 * are always supported (spec demand) */
784 if (!is_legacy(tbl
->lq_type
) && (!ht_possible
|| !scale_index
)) {
785 switch_to_legacy
= 1;
786 scale_index
= rs_ht_to_legacy
[scale_index
];
787 if (lq_sta
->band
== IEEE80211_BAND_5GHZ
)
792 if (num_of_ant(tbl
->ant_type
) > 1)
794 first_antenna(mvm
->nvm_data
->valid_tx_ant
);
798 tbl
->max_search
= IWL_MAX_SEARCH
;
801 rate_mask
= rs_get_supported_rates(lq_sta
, NULL
, tbl
->lq_type
);
803 /* Mask with station rate restriction */
804 if (is_legacy(tbl
->lq_type
)) {
805 /* supp_rates has no CCK bits in A mode */
806 if (lq_sta
->band
== IEEE80211_BAND_5GHZ
)
807 rate_mask
= (u16
)(rate_mask
&
808 (lq_sta
->supp_rates
<< IWL_FIRST_OFDM_RATE
));
810 rate_mask
= (u16
)(rate_mask
& lq_sta
->supp_rates
);
813 /* If we switched from HT to legacy, check current rate */
814 if (switch_to_legacy
&& (rate_mask
& (1 << scale_index
))) {
819 high_low
= rs_get_adjacent_rate(lq_sta
->drv
, scale_index
, rate_mask
,
821 low
= high_low
& 0xff;
823 if (low
== IWL_RATE_INVALID
)
827 return rate_n_flags_from_tbl(lq_sta
->drv
, tbl
, low
, is_green
);
831 * Simple function to compare two rate scale table types
833 static bool table_type_matches(struct iwl_scale_tbl_info
*a
,
834 struct iwl_scale_tbl_info
*b
)
836 return (a
->lq_type
== b
->lq_type
) && (a
->ant_type
== b
->ant_type
) &&
837 (a
->is_SGI
== b
->is_SGI
);
841 * mac80211 sends us Tx status
843 static void rs_tx_status(void *mvm_r
, struct ieee80211_supported_band
*sband
,
844 struct ieee80211_sta
*sta
, void *priv_sta
,
849 int rs_index
, mac_index
, i
;
850 struct iwl_lq_sta
*lq_sta
= priv_sta
;
851 struct iwl_lq_cmd
*table
;
852 struct ieee80211_hdr
*hdr
= (struct ieee80211_hdr
*)skb
->data
;
853 struct iwl_op_mode
*op_mode
= (struct iwl_op_mode
*)mvm_r
;
854 struct iwl_mvm
*mvm
= IWL_OP_MODE_GET_MVM(op_mode
);
855 struct ieee80211_tx_info
*info
= IEEE80211_SKB_CB(skb
);
856 enum mac80211_rate_control_flags mac_flags
;
858 struct iwl_scale_tbl_info tbl_type
;
859 struct iwl_scale_tbl_info
*curr_tbl
, *other_tbl
, *tmp_tbl
;
861 IWL_DEBUG_RATE_LIMIT(mvm
,
862 "get frame ack response, update rate scale window\n");
864 /* Treat uninitialized rate scaling data same as non-existing. */
866 IWL_DEBUG_RATE(mvm
, "Station rate scaling not created yet.\n");
868 } else if (!lq_sta
->drv
) {
869 IWL_DEBUG_RATE(mvm
, "Rate scaling not initialized yet.\n");
873 if (!ieee80211_is_data(hdr
->frame_control
) ||
874 info
->flags
& IEEE80211_TX_CTL_NO_ACK
)
877 /* This packet was aggregated but doesn't carry status info */
878 if ((info
->flags
& IEEE80211_TX_CTL_AMPDU
) &&
879 !(info
->flags
& IEEE80211_TX_STAT_AMPDU
))
883 * Ignore this Tx frame response if its initial rate doesn't match
884 * that of latest Link Quality command. There may be stragglers
885 * from a previous Link Quality command, but we're no longer interested
886 * in those; they're either from the "active" mode while we're trying
887 * to check "search" mode, or a prior "search" mode after we've moved
888 * to a new "search" mode (which might become the new "active" mode).
891 tx_rate
= le32_to_cpu(table
->rs_table
[0]);
892 rs_get_tbl_info_from_mcs(tx_rate
, info
->band
, &tbl_type
, &rs_index
);
893 if (info
->band
== IEEE80211_BAND_5GHZ
)
894 rs_index
-= IWL_FIRST_OFDM_RATE
;
895 mac_flags
= info
->status
.rates
[0].flags
;
896 mac_index
= info
->status
.rates
[0].idx
;
897 /* For HT packets, map MCS to PLCP */
898 if (mac_flags
& IEEE80211_TX_RC_MCS
) {
899 /* Remove # of streams */
900 mac_index
&= RATE_HT_MCS_RATE_CODE_MSK
;
901 if (mac_index
>= (IWL_RATE_9M_INDEX
- IWL_FIRST_OFDM_RATE
))
904 * mac80211 HT index is always zero-indexed; we need to move
905 * HT OFDM rates after CCK rates in 2.4 GHz band
907 if (info
->band
== IEEE80211_BAND_2GHZ
)
908 mac_index
+= IWL_FIRST_OFDM_RATE
;
910 /* Here we actually compare this rate to the latest LQ command */
911 if ((mac_index
< 0) ||
912 (tbl_type
.is_SGI
!= !!(mac_flags
& IEEE80211_TX_RC_SHORT_GI
)) ||
913 (tbl_type
.is_ht40
!= !!(mac_flags
& IEEE80211_TX_RC_40_MHZ_WIDTH
)) ||
914 (tbl_type
.ant_type
!= info
->status
.antenna
) ||
915 (!!(tx_rate
& RATE_MCS_HT_MSK
) !=
916 !!(mac_flags
& IEEE80211_TX_RC_MCS
)) ||
917 (!!(tx_rate
& RATE_HT_MCS_GF_MSK
) !=
918 !!(mac_flags
& IEEE80211_TX_RC_GREEN_FIELD
)) ||
919 (rs_index
!= mac_index
)) {
921 "initial rate %d does not match %d (0x%x)\n",
922 mac_index
, rs_index
, tx_rate
);
924 * Since rates mis-match, the last LQ command may have failed.
925 * After IWL_MISSED_RATE_MAX mis-matches, resync the uCode with
928 lq_sta
->missed_rate_counter
++;
929 if (lq_sta
->missed_rate_counter
> IWL_MISSED_RATE_MAX
) {
930 lq_sta
->missed_rate_counter
= 0;
931 iwl_mvm_send_lq_cmd(mvm
, &lq_sta
->lq
, CMD_ASYNC
, false);
933 /* Regardless, ignore this status info for outdated rate */
936 /* Rate did match, so reset the missed_rate_counter */
937 lq_sta
->missed_rate_counter
= 0;
939 /* Figure out if rate scale algorithm is in active or search table */
940 if (table_type_matches(&tbl_type
,
941 &(lq_sta
->lq_info
[lq_sta
->active_tbl
]))) {
942 curr_tbl
= &(lq_sta
->lq_info
[lq_sta
->active_tbl
]);
943 other_tbl
= &(lq_sta
->lq_info
[1 - lq_sta
->active_tbl
]);
944 } else if (table_type_matches(
945 &tbl_type
, &lq_sta
->lq_info
[1 - lq_sta
->active_tbl
])) {
946 curr_tbl
= &(lq_sta
->lq_info
[1 - lq_sta
->active_tbl
]);
947 other_tbl
= &(lq_sta
->lq_info
[lq_sta
->active_tbl
]);
950 "Neither active nor search matches tx rate\n");
951 tmp_tbl
= &(lq_sta
->lq_info
[lq_sta
->active_tbl
]);
952 IWL_DEBUG_RATE(mvm
, "active- lq:%x, ant:%x, SGI:%d\n",
953 tmp_tbl
->lq_type
, tmp_tbl
->ant_type
,
955 tmp_tbl
= &(lq_sta
->lq_info
[1 - lq_sta
->active_tbl
]);
956 IWL_DEBUG_RATE(mvm
, "search- lq:%x, ant:%x, SGI:%d\n",
957 tmp_tbl
->lq_type
, tmp_tbl
->ant_type
,
959 IWL_DEBUG_RATE(mvm
, "actual- lq:%x, ant:%x, SGI:%d\n",
960 tbl_type
.lq_type
, tbl_type
.ant_type
,
963 * no matching table found, let's by-pass the data collection
964 * and continue to perform rate scale to find the rate table
966 rs_stay_in_table(lq_sta
, true);
971 * Updating the frame history depends on whether packets were
974 * For aggregation, all packets were transmitted at the same rate, the
975 * first index into rate scale table.
977 if (info
->flags
& IEEE80211_TX_STAT_AMPDU
) {
978 tx_rate
= le32_to_cpu(table
->rs_table
[0]);
979 rs_get_tbl_info_from_mcs(tx_rate
, info
->band
, &tbl_type
,
981 rs_collect_tx_data(curr_tbl
, rs_index
,
982 info
->status
.ampdu_len
,
983 info
->status
.ampdu_ack_len
);
985 /* Update success/fail counts if not searching for new mode */
986 if (lq_sta
->stay_in_tbl
) {
987 lq_sta
->total_success
+= info
->status
.ampdu_ack_len
;
988 lq_sta
->total_failed
+= (info
->status
.ampdu_len
-
989 info
->status
.ampdu_ack_len
);
993 * For legacy, update frame history with for each Tx retry.
995 retries
= info
->status
.rates
[0].count
- 1;
996 /* HW doesn't send more than 15 retries */
997 retries
= min(retries
, 15);
999 /* The last transmission may have been successful */
1000 legacy_success
= !!(info
->flags
& IEEE80211_TX_STAT_ACK
);
1001 /* Collect data for each rate used during failed TX attempts */
1002 for (i
= 0; i
<= retries
; ++i
) {
1003 tx_rate
= le32_to_cpu(table
->rs_table
[i
]);
1004 rs_get_tbl_info_from_mcs(tx_rate
, info
->band
,
1005 &tbl_type
, &rs_index
);
1007 * Only collect stats if retried rate is in the same RS
1008 * table as active/search.
1010 if (table_type_matches(&tbl_type
, curr_tbl
))
1012 else if (table_type_matches(&tbl_type
, other_tbl
))
1013 tmp_tbl
= other_tbl
;
1016 rs_collect_tx_data(tmp_tbl
, rs_index
, 1,
1017 i
< retries
? 0 : legacy_success
);
1020 /* Update success/fail counts if not searching for new mode */
1021 if (lq_sta
->stay_in_tbl
) {
1022 lq_sta
->total_success
+= legacy_success
;
1023 lq_sta
->total_failed
+= retries
+ (1 - legacy_success
);
1026 /* The last TX rate is cached in lq_sta; it's set in if/else above */
1027 lq_sta
->last_rate_n_flags
= tx_rate
;
1029 /* See if there's a better rate or modulation mode to try. */
1030 if (sta
&& sta
->supp_rates
[sband
->band
])
1031 rs_rate_scale_perform(mvm
, skb
, sta
, lq_sta
);
1035 * Begin a period of staying with a selected modulation mode.
1036 * Set "stay_in_tbl" flag to prevent any mode switches.
1037 * Set frame tx success limits according to legacy vs. high-throughput,
1038 * and reset overall (spanning all rates) tx success history statistics.
1039 * These control how long we stay using same modulation mode before
1040 * searching for a new mode.
1042 static void rs_set_stay_in_table(struct iwl_mvm
*mvm
, u8 is_legacy
,
1043 struct iwl_lq_sta
*lq_sta
)
1045 IWL_DEBUG_RATE(mvm
, "we are staying in the same table\n");
1046 lq_sta
->stay_in_tbl
= 1; /* only place this gets set */
1048 lq_sta
->table_count_limit
= IWL_LEGACY_TABLE_COUNT
;
1049 lq_sta
->max_failure_limit
= IWL_LEGACY_FAILURE_LIMIT
;
1050 lq_sta
->max_success_limit
= IWL_LEGACY_SUCCESS_LIMIT
;
1052 lq_sta
->table_count_limit
= IWL_NONE_LEGACY_TABLE_COUNT
;
1053 lq_sta
->max_failure_limit
= IWL_NONE_LEGACY_FAILURE_LIMIT
;
1054 lq_sta
->max_success_limit
= IWL_NONE_LEGACY_SUCCESS_LIMIT
;
1056 lq_sta
->table_count
= 0;
1057 lq_sta
->total_failed
= 0;
1058 lq_sta
->total_success
= 0;
1059 lq_sta
->flush_timer
= jiffies
;
1060 lq_sta
->action_counter
= 0;
1064 * Find correct throughput table for given mode of modulation
1066 static void rs_set_expected_tpt_table(struct iwl_lq_sta
*lq_sta
,
1067 struct iwl_scale_tbl_info
*tbl
)
1069 /* Used to choose among HT tables */
1070 s32 (*ht_tbl_pointer
)[IWL_RATE_COUNT
];
1072 /* Check for invalid LQ type */
1073 if (WARN_ON_ONCE(!is_legacy(tbl
->lq_type
) && !is_Ht(tbl
->lq_type
))) {
1074 tbl
->expected_tpt
= expected_tpt_legacy
;
1078 /* Legacy rates have only one table */
1079 if (is_legacy(tbl
->lq_type
)) {
1080 tbl
->expected_tpt
= expected_tpt_legacy
;
1084 /* Choose among many HT tables depending on number of streams
1085 * (SISO/MIMO2/MIMO3), channel width (20/40), SGI, and aggregation
1087 if (is_siso(tbl
->lq_type
) && !tbl
->is_ht40
)
1088 ht_tbl_pointer
= expected_tpt_siso20MHz
;
1089 else if (is_siso(tbl
->lq_type
))
1090 ht_tbl_pointer
= expected_tpt_siso40MHz
;
1091 else if (is_mimo2(tbl
->lq_type
) && !tbl
->is_ht40
)
1092 ht_tbl_pointer
= expected_tpt_mimo2_20MHz
;
1093 else if (is_mimo2(tbl
->lq_type
))
1094 ht_tbl_pointer
= expected_tpt_mimo2_40MHz
;
1095 else if (is_mimo3(tbl
->lq_type
) && !tbl
->is_ht40
)
1096 ht_tbl_pointer
= expected_tpt_mimo3_20MHz
;
1097 else /* if (is_mimo3(tbl->lq_type)) <-- must be true */
1098 ht_tbl_pointer
= expected_tpt_mimo3_40MHz
;
1100 if (!tbl
->is_SGI
&& !lq_sta
->is_agg
) /* Normal */
1101 tbl
->expected_tpt
= ht_tbl_pointer
[0];
1102 else if (tbl
->is_SGI
&& !lq_sta
->is_agg
) /* SGI */
1103 tbl
->expected_tpt
= ht_tbl_pointer
[1];
1104 else if (!tbl
->is_SGI
&& lq_sta
->is_agg
) /* AGG */
1105 tbl
->expected_tpt
= ht_tbl_pointer
[2];
1107 tbl
->expected_tpt
= ht_tbl_pointer
[3];
1111 * Find starting rate for new "search" high-throughput mode of modulation.
1112 * Goal is to find lowest expected rate (under perfect conditions) that is
1113 * above the current measured throughput of "active" mode, to give new mode
1114 * a fair chance to prove itself without too many challenges.
1116 * This gets called when transitioning to more aggressive modulation
1117 * (i.e. legacy to SISO or MIMO, or SISO to MIMO), as well as less aggressive
1118 * (i.e. MIMO to SISO). When moving to MIMO, bit rate will typically need
1119 * to decrease to match "active" throughput. When moving from MIMO to SISO,
1120 * bit rate will typically need to increase, but not if performance was bad.
1122 static s32
rs_get_best_rate(struct iwl_mvm
*mvm
,
1123 struct iwl_lq_sta
*lq_sta
,
1124 struct iwl_scale_tbl_info
*tbl
, /* "search" */
1125 u16 rate_mask
, s8 index
)
1127 /* "active" values */
1128 struct iwl_scale_tbl_info
*active_tbl
=
1129 &(lq_sta
->lq_info
[lq_sta
->active_tbl
]);
1130 s32 active_sr
= active_tbl
->win
[index
].success_ratio
;
1131 s32 active_tpt
= active_tbl
->expected_tpt
[index
];
1133 /* expected "search" throughput */
1134 s32
*tpt_tbl
= tbl
->expected_tpt
;
1136 s32 new_rate
, high
, low
, start_hi
;
1140 new_rate
= high
= low
= start_hi
= IWL_RATE_INVALID
;
1143 high_low
= rs_get_adjacent_rate(mvm
, rate
, rate_mask
,
1146 low
= high_low
& 0xff;
1147 high
= (high_low
>> 8) & 0xff;
1150 * Lower the "search" bit rate, to give new "search" mode
1151 * approximately the same throughput as "active" if:
1153 * 1) "Active" mode has been working modestly well (but not
1154 * great), and expected "search" throughput (under perfect
1155 * conditions) at candidate rate is above the actual
1156 * measured "active" throughput (but less than expected
1157 * "active" throughput under perfect conditions).
1159 * 2) "Active" mode has been working perfectly or very well
1160 * and expected "search" throughput (under perfect
1161 * conditions) at candidate rate is above expected
1162 * "active" throughput (under perfect conditions).
1164 if ((((100 * tpt_tbl
[rate
]) > lq_sta
->last_tpt
) &&
1165 ((active_sr
> IWL_RATE_DECREASE_TH
) &&
1166 (active_sr
<= IWL_RATE_HIGH_TH
) &&
1167 (tpt_tbl
[rate
] <= active_tpt
))) ||
1168 ((active_sr
>= IWL_RATE_SCALE_SWITCH
) &&
1169 (tpt_tbl
[rate
] > active_tpt
))) {
1170 /* (2nd or later pass)
1171 * If we've already tried to raise the rate, and are
1172 * now trying to lower it, use the higher rate. */
1173 if (start_hi
!= IWL_RATE_INVALID
) {
1174 new_rate
= start_hi
;
1180 /* Loop again with lower rate */
1181 if (low
!= IWL_RATE_INVALID
)
1184 /* Lower rate not available, use the original */
1188 /* Else try to raise the "search" rate to match "active" */
1190 /* (2nd or later pass)
1191 * If we've already tried to lower the rate, and are
1192 * now trying to raise it, use the lower rate. */
1193 if (new_rate
!= IWL_RATE_INVALID
)
1196 /* Loop again with higher rate */
1197 else if (high
!= IWL_RATE_INVALID
) {
1201 /* Higher rate not available, use the original */
1212 static bool iwl_is_ht40_tx_allowed(struct ieee80211_sta
*sta
)
1214 return sta
->bandwidth
>= IEEE80211_STA_RX_BW_40
;
1218 * Set up search table for MIMO2
1220 static int rs_switch_to_mimo2(struct iwl_mvm
*mvm
,
1221 struct iwl_lq_sta
*lq_sta
,
1222 struct ieee80211_sta
*sta
,
1223 struct iwl_scale_tbl_info
*tbl
, int index
)
1227 s8 is_green
= lq_sta
->is_green
;
1229 if (!sta
->ht_cap
.ht_supported
)
1232 if (((sta
->ht_cap
.cap
& IEEE80211_HT_CAP_SM_PS
) >> 2)
1233 == WLAN_HT_CAP_SM_PS_STATIC
)
1236 /* Need both Tx chains/antennas to support MIMO */
1237 if (num_of_ant(mvm
->nvm_data
->valid_tx_ant
) < 2)
1240 IWL_DEBUG_RATE(mvm
, "LQ: try to switch to MIMO2\n");
1242 tbl
->lq_type
= LQ_MIMO2
;
1244 tbl
->max_search
= IWL_MAX_SEARCH
;
1245 rate_mask
= lq_sta
->active_mimo2_rate
;
1247 if (iwl_is_ht40_tx_allowed(sta
))
1252 rs_set_expected_tpt_table(lq_sta
, tbl
);
1254 rate
= rs_get_best_rate(mvm
, lq_sta
, tbl
, rate_mask
, index
);
1256 IWL_DEBUG_RATE(mvm
, "LQ: MIMO2 best rate %d mask %X\n",
1258 if ((rate
== IWL_RATE_INVALID
) || !((1 << rate
) & rate_mask
)) {
1259 IWL_DEBUG_RATE(mvm
, "Can't switch with index %d rate mask %x\n",
1263 tbl
->current_rate
= rate_n_flags_from_tbl(mvm
, tbl
, rate
, is_green
);
1265 IWL_DEBUG_RATE(mvm
, "LQ: Switch to new mcs %X index is green %X\n",
1266 tbl
->current_rate
, is_green
);
1271 * Set up search table for MIMO3
1273 static int rs_switch_to_mimo3(struct iwl_mvm
*mvm
,
1274 struct iwl_lq_sta
*lq_sta
,
1275 struct ieee80211_sta
*sta
,
1276 struct iwl_scale_tbl_info
*tbl
, int index
)
1280 s8 is_green
= lq_sta
->is_green
;
1282 if (!sta
->ht_cap
.ht_supported
)
1285 if (((sta
->ht_cap
.cap
& IEEE80211_HT_CAP_SM_PS
) >> 2)
1286 == WLAN_HT_CAP_SM_PS_STATIC
)
1289 /* Need both Tx chains/antennas to support MIMO */
1290 if (num_of_ant(mvm
->nvm_data
->valid_tx_ant
) < 3)
1293 IWL_DEBUG_RATE(mvm
, "LQ: try to switch to MIMO3\n");
1295 tbl
->lq_type
= LQ_MIMO3
;
1297 tbl
->max_search
= IWL_MAX_11N_MIMO3_SEARCH
;
1298 rate_mask
= lq_sta
->active_mimo3_rate
;
1300 if (iwl_is_ht40_tx_allowed(sta
))
1305 rs_set_expected_tpt_table(lq_sta
, tbl
);
1307 rate
= rs_get_best_rate(mvm
, lq_sta
, tbl
, rate_mask
, index
);
1309 IWL_DEBUG_RATE(mvm
, "LQ: MIMO3 best rate %d mask %X\n",
1311 if ((rate
== IWL_RATE_INVALID
) || !((1 << rate
) & rate_mask
)) {
1312 IWL_DEBUG_RATE(mvm
, "Can't switch with index %d rate mask %x\n",
1316 tbl
->current_rate
= rate_n_flags_from_tbl(mvm
, tbl
, rate
, is_green
);
1318 IWL_DEBUG_RATE(mvm
, "LQ: Switch to new mcs %X index is green %X\n",
1319 tbl
->current_rate
, is_green
);
1324 * Set up search table for SISO
1326 static int rs_switch_to_siso(struct iwl_mvm
*mvm
,
1327 struct iwl_lq_sta
*lq_sta
,
1328 struct ieee80211_sta
*sta
,
1329 struct iwl_scale_tbl_info
*tbl
, int index
)
1332 u8 is_green
= lq_sta
->is_green
;
1335 if (!sta
->ht_cap
.ht_supported
)
1338 IWL_DEBUG_RATE(mvm
, "LQ: try to switch to SISO\n");
1340 tbl
->lq_type
= LQ_SISO
;
1342 tbl
->max_search
= IWL_MAX_SEARCH
;
1343 rate_mask
= lq_sta
->active_siso_rate
;
1345 if (iwl_is_ht40_tx_allowed(sta
))
1351 tbl
->is_SGI
= 0; /*11n spec: no SGI in SISO+Greenfield*/
1353 rs_set_expected_tpt_table(lq_sta
, tbl
);
1354 rate
= rs_get_best_rate(mvm
, lq_sta
, tbl
, rate_mask
, index
);
1356 IWL_DEBUG_RATE(mvm
, "LQ: get best rate %d mask %X\n", rate
, rate_mask
);
1357 if ((rate
== IWL_RATE_INVALID
) || !((1 << rate
) & rate_mask
)) {
1359 "can not switch with index %d rate mask %x\n",
1363 tbl
->current_rate
= rate_n_flags_from_tbl(mvm
, tbl
, rate
, is_green
);
1364 IWL_DEBUG_RATE(mvm
, "LQ: Switch to new mcs %X index is green %X\n",
1365 tbl
->current_rate
, is_green
);
1370 * Try to switch to new modulation mode from legacy
1372 static int rs_move_legacy_other(struct iwl_mvm
*mvm
,
1373 struct iwl_lq_sta
*lq_sta
,
1374 struct ieee80211_sta
*sta
,
1377 struct iwl_scale_tbl_info
*tbl
= &(lq_sta
->lq_info
[lq_sta
->active_tbl
]);
1378 struct iwl_scale_tbl_info
*search_tbl
=
1379 &(lq_sta
->lq_info
[(1 - lq_sta
->active_tbl
)]);
1380 struct iwl_rate_scale_data
*window
= &(tbl
->win
[index
]);
1381 u32 sz
= (sizeof(struct iwl_scale_tbl_info
) -
1382 (sizeof(struct iwl_rate_scale_data
) * IWL_RATE_COUNT
));
1384 u8 valid_tx_ant
= mvm
->nvm_data
->valid_tx_ant
;
1385 u8 tx_chains_num
= num_of_ant(valid_tx_ant
);
1387 u8 update_search_tbl_counter
= 0;
1389 start_action
= tbl
->action
;
1391 lq_sta
->action_counter
++;
1392 switch (tbl
->action
) {
1393 case IWL_LEGACY_SWITCH_ANTENNA1
:
1394 case IWL_LEGACY_SWITCH_ANTENNA2
:
1395 IWL_DEBUG_RATE(mvm
, "LQ: Legacy toggle Antenna\n");
1397 if ((tbl
->action
== IWL_LEGACY_SWITCH_ANTENNA1
&&
1398 tx_chains_num
<= 1) ||
1399 (tbl
->action
== IWL_LEGACY_SWITCH_ANTENNA2
&&
1400 tx_chains_num
<= 2))
1403 /* Don't change antenna if success has been great */
1404 if (window
->success_ratio
>= IWL_RS_GOOD_RATIO
)
1407 /* Set up search table to try other antenna */
1408 memcpy(search_tbl
, tbl
, sz
);
1410 if (rs_toggle_antenna(valid_tx_ant
,
1411 &search_tbl
->current_rate
,
1413 update_search_tbl_counter
= 1;
1414 rs_set_expected_tpt_table(lq_sta
, search_tbl
);
1418 case IWL_LEGACY_SWITCH_SISO
:
1419 IWL_DEBUG_RATE(mvm
, "LQ: Legacy switch to SISO\n");
1421 /* Set up search table to try SISO */
1422 memcpy(search_tbl
, tbl
, sz
);
1423 search_tbl
->is_SGI
= 0;
1424 ret
= rs_switch_to_siso(mvm
, lq_sta
, sta
,
1427 lq_sta
->action_counter
= 0;
1432 case IWL_LEGACY_SWITCH_MIMO2_AB
:
1433 case IWL_LEGACY_SWITCH_MIMO2_AC
:
1434 case IWL_LEGACY_SWITCH_MIMO2_BC
:
1435 IWL_DEBUG_RATE(mvm
, "LQ: Legacy switch to MIMO2\n");
1437 /* Set up search table to try MIMO */
1438 memcpy(search_tbl
, tbl
, sz
);
1439 search_tbl
->is_SGI
= 0;
1441 if (tbl
->action
== IWL_LEGACY_SWITCH_MIMO2_AB
)
1442 search_tbl
->ant_type
= ANT_AB
;
1443 else if (tbl
->action
== IWL_LEGACY_SWITCH_MIMO2_AC
)
1444 search_tbl
->ant_type
= ANT_AC
;
1446 search_tbl
->ant_type
= ANT_BC
;
1448 if (!rs_is_valid_ant(valid_tx_ant
,
1449 search_tbl
->ant_type
))
1452 ret
= rs_switch_to_mimo2(mvm
, lq_sta
, sta
,
1455 lq_sta
->action_counter
= 0;
1460 case IWL_LEGACY_SWITCH_MIMO3_ABC
:
1461 IWL_DEBUG_RATE(mvm
, "LQ: Legacy switch to MIMO3\n");
1463 /* Set up search table to try MIMO3 */
1464 memcpy(search_tbl
, tbl
, sz
);
1465 search_tbl
->is_SGI
= 0;
1467 search_tbl
->ant_type
= ANT_ABC
;
1469 if (!rs_is_valid_ant(valid_tx_ant
,
1470 search_tbl
->ant_type
))
1473 ret
= rs_switch_to_mimo3(mvm
, lq_sta
, sta
,
1476 lq_sta
->action_counter
= 0;
1482 if (tbl
->action
> IWL_LEGACY_SWITCH_MIMO3_ABC
)
1483 tbl
->action
= IWL_LEGACY_SWITCH_ANTENNA1
;
1485 if (tbl
->action
== start_action
)
1488 search_tbl
->lq_type
= LQ_NONE
;
1492 lq_sta
->search_better_tbl
= 1;
1494 if (tbl
->action
> IWL_LEGACY_SWITCH_MIMO3_ABC
)
1495 tbl
->action
= IWL_LEGACY_SWITCH_ANTENNA1
;
1496 if (update_search_tbl_counter
)
1497 search_tbl
->action
= tbl
->action
;
1502 * Try to switch to new modulation mode from SISO
1504 static int rs_move_siso_to_other(struct iwl_mvm
*mvm
,
1505 struct iwl_lq_sta
*lq_sta
,
1506 struct ieee80211_sta
*sta
, int index
)
1508 u8 is_green
= lq_sta
->is_green
;
1509 struct iwl_scale_tbl_info
*tbl
= &(lq_sta
->lq_info
[lq_sta
->active_tbl
]);
1510 struct iwl_scale_tbl_info
*search_tbl
=
1511 &(lq_sta
->lq_info
[(1 - lq_sta
->active_tbl
)]);
1512 struct iwl_rate_scale_data
*window
= &(tbl
->win
[index
]);
1513 struct ieee80211_sta_ht_cap
*ht_cap
= &sta
->ht_cap
;
1514 u32 sz
= (sizeof(struct iwl_scale_tbl_info
) -
1515 (sizeof(struct iwl_rate_scale_data
) * IWL_RATE_COUNT
));
1517 u8 valid_tx_ant
= mvm
->nvm_data
->valid_tx_ant
;
1518 u8 tx_chains_num
= num_of_ant(valid_tx_ant
);
1519 u8 update_search_tbl_counter
= 0;
1522 start_action
= tbl
->action
;
1524 lq_sta
->action_counter
++;
1525 switch (tbl
->action
) {
1526 case IWL_SISO_SWITCH_ANTENNA1
:
1527 case IWL_SISO_SWITCH_ANTENNA2
:
1528 IWL_DEBUG_RATE(mvm
, "LQ: SISO toggle Antenna\n");
1529 if ((tbl
->action
== IWL_SISO_SWITCH_ANTENNA1
&&
1530 tx_chains_num
<= 1) ||
1531 (tbl
->action
== IWL_SISO_SWITCH_ANTENNA2
&&
1532 tx_chains_num
<= 2))
1535 if (window
->success_ratio
>= IWL_RS_GOOD_RATIO
)
1538 memcpy(search_tbl
, tbl
, sz
);
1539 if (rs_toggle_antenna(valid_tx_ant
,
1540 &search_tbl
->current_rate
,
1542 update_search_tbl_counter
= 1;
1546 case IWL_SISO_SWITCH_MIMO2_AB
:
1547 case IWL_SISO_SWITCH_MIMO2_AC
:
1548 case IWL_SISO_SWITCH_MIMO2_BC
:
1549 IWL_DEBUG_RATE(mvm
, "LQ: SISO switch to MIMO2\n");
1550 memcpy(search_tbl
, tbl
, sz
);
1551 search_tbl
->is_SGI
= 0;
1553 if (tbl
->action
== IWL_SISO_SWITCH_MIMO2_AB
)
1554 search_tbl
->ant_type
= ANT_AB
;
1555 else if (tbl
->action
== IWL_SISO_SWITCH_MIMO2_AC
)
1556 search_tbl
->ant_type
= ANT_AC
;
1558 search_tbl
->ant_type
= ANT_BC
;
1560 if (!rs_is_valid_ant(valid_tx_ant
,
1561 search_tbl
->ant_type
))
1564 ret
= rs_switch_to_mimo2(mvm
, lq_sta
, sta
,
1569 case IWL_SISO_SWITCH_GI
:
1570 if (!tbl
->is_ht40
&& !(ht_cap
->cap
&
1571 IEEE80211_HT_CAP_SGI_20
))
1573 if (tbl
->is_ht40
&& !(ht_cap
->cap
&
1574 IEEE80211_HT_CAP_SGI_40
))
1577 IWL_DEBUG_RATE(mvm
, "LQ: SISO toggle SGI/NGI\n");
1579 memcpy(search_tbl
, tbl
, sz
);
1585 "SGI was set in GF+SISO\n");
1587 search_tbl
->is_SGI
= !tbl
->is_SGI
;
1588 rs_set_expected_tpt_table(lq_sta
, search_tbl
);
1590 s32 tpt
= lq_sta
->last_tpt
/ 100;
1591 if (tpt
>= search_tbl
->expected_tpt
[index
])
1594 search_tbl
->current_rate
=
1595 rate_n_flags_from_tbl(mvm
, search_tbl
,
1597 update_search_tbl_counter
= 1;
1599 case IWL_SISO_SWITCH_MIMO3_ABC
:
1600 IWL_DEBUG_RATE(mvm
, "LQ: SISO switch to MIMO3\n");
1601 memcpy(search_tbl
, tbl
, sz
);
1602 search_tbl
->is_SGI
= 0;
1603 search_tbl
->ant_type
= ANT_ABC
;
1605 if (!rs_is_valid_ant(valid_tx_ant
,
1606 search_tbl
->ant_type
))
1609 ret
= rs_switch_to_mimo3(mvm
, lq_sta
, sta
,
1616 if (tbl
->action
> IWL_LEGACY_SWITCH_MIMO3_ABC
)
1617 tbl
->action
= IWL_SISO_SWITCH_ANTENNA1
;
1619 if (tbl
->action
== start_action
)
1622 search_tbl
->lq_type
= LQ_NONE
;
1626 lq_sta
->search_better_tbl
= 1;
1628 if (tbl
->action
> IWL_SISO_SWITCH_MIMO3_ABC
)
1629 tbl
->action
= IWL_SISO_SWITCH_ANTENNA1
;
1630 if (update_search_tbl_counter
)
1631 search_tbl
->action
= tbl
->action
;
1637 * Try to switch to new modulation mode from MIMO2
1639 static int rs_move_mimo2_to_other(struct iwl_mvm
*mvm
,
1640 struct iwl_lq_sta
*lq_sta
,
1641 struct ieee80211_sta
*sta
, int index
)
1643 s8 is_green
= lq_sta
->is_green
;
1644 struct iwl_scale_tbl_info
*tbl
= &(lq_sta
->lq_info
[lq_sta
->active_tbl
]);
1645 struct iwl_scale_tbl_info
*search_tbl
=
1646 &(lq_sta
->lq_info
[(1 - lq_sta
->active_tbl
)]);
1647 struct iwl_rate_scale_data
*window
= &(tbl
->win
[index
]);
1648 struct ieee80211_sta_ht_cap
*ht_cap
= &sta
->ht_cap
;
1649 u32 sz
= (sizeof(struct iwl_scale_tbl_info
) -
1650 (sizeof(struct iwl_rate_scale_data
) * IWL_RATE_COUNT
));
1652 u8 valid_tx_ant
= mvm
->nvm_data
->valid_tx_ant
;
1653 u8 tx_chains_num
= num_of_ant(valid_tx_ant
);
1654 u8 update_search_tbl_counter
= 0;
1657 start_action
= tbl
->action
;
1659 lq_sta
->action_counter
++;
1660 switch (tbl
->action
) {
1661 case IWL_MIMO2_SWITCH_ANTENNA1
:
1662 case IWL_MIMO2_SWITCH_ANTENNA2
:
1663 IWL_DEBUG_RATE(mvm
, "LQ: MIMO2 toggle Antennas\n");
1665 if (tx_chains_num
<= 2)
1668 if (window
->success_ratio
>= IWL_RS_GOOD_RATIO
)
1671 memcpy(search_tbl
, tbl
, sz
);
1672 if (rs_toggle_antenna(valid_tx_ant
,
1673 &search_tbl
->current_rate
,
1675 update_search_tbl_counter
= 1;
1679 case IWL_MIMO2_SWITCH_SISO_A
:
1680 case IWL_MIMO2_SWITCH_SISO_B
:
1681 case IWL_MIMO2_SWITCH_SISO_C
:
1682 IWL_DEBUG_RATE(mvm
, "LQ: MIMO2 switch to SISO\n");
1684 /* Set up new search table for SISO */
1685 memcpy(search_tbl
, tbl
, sz
);
1687 if (tbl
->action
== IWL_MIMO2_SWITCH_SISO_A
)
1688 search_tbl
->ant_type
= ANT_A
;
1689 else if (tbl
->action
== IWL_MIMO2_SWITCH_SISO_B
)
1690 search_tbl
->ant_type
= ANT_B
;
1692 search_tbl
->ant_type
= ANT_C
;
1694 if (!rs_is_valid_ant(valid_tx_ant
,
1695 search_tbl
->ant_type
))
1698 ret
= rs_switch_to_siso(mvm
, lq_sta
, sta
,
1705 case IWL_MIMO2_SWITCH_GI
:
1706 if (!tbl
->is_ht40
&& !(ht_cap
->cap
&
1707 IEEE80211_HT_CAP_SGI_20
))
1709 if (tbl
->is_ht40
&& !(ht_cap
->cap
&
1710 IEEE80211_HT_CAP_SGI_40
))
1713 IWL_DEBUG_RATE(mvm
, "LQ: MIMO2 toggle SGI/NGI\n");
1715 /* Set up new search table for MIMO2 */
1716 memcpy(search_tbl
, tbl
, sz
);
1717 search_tbl
->is_SGI
= !tbl
->is_SGI
;
1718 rs_set_expected_tpt_table(lq_sta
, search_tbl
);
1720 * If active table already uses the fastest possible
1721 * modulation (dual stream with short guard interval),
1722 * and it's working well, there's no need to look
1723 * for a better type of modulation!
1726 s32 tpt
= lq_sta
->last_tpt
/ 100;
1727 if (tpt
>= search_tbl
->expected_tpt
[index
])
1730 search_tbl
->current_rate
=
1731 rate_n_flags_from_tbl(mvm
, search_tbl
,
1733 update_search_tbl_counter
= 1;
1736 case IWL_MIMO2_SWITCH_MIMO3_ABC
:
1737 IWL_DEBUG_RATE(mvm
, "LQ: MIMO2 switch to MIMO3\n");
1738 memcpy(search_tbl
, tbl
, sz
);
1739 search_tbl
->is_SGI
= 0;
1740 search_tbl
->ant_type
= ANT_ABC
;
1742 if (!rs_is_valid_ant(valid_tx_ant
,
1743 search_tbl
->ant_type
))
1746 ret
= rs_switch_to_mimo3(mvm
, lq_sta
, sta
,
1754 if (tbl
->action
> IWL_MIMO2_SWITCH_MIMO3_ABC
)
1755 tbl
->action
= IWL_MIMO2_SWITCH_ANTENNA1
;
1757 if (tbl
->action
== start_action
)
1760 search_tbl
->lq_type
= LQ_NONE
;
1763 lq_sta
->search_better_tbl
= 1;
1765 if (tbl
->action
> IWL_MIMO2_SWITCH_MIMO3_ABC
)
1766 tbl
->action
= IWL_MIMO2_SWITCH_ANTENNA1
;
1767 if (update_search_tbl_counter
)
1768 search_tbl
->action
= tbl
->action
;
1774 * Try to switch to new modulation mode from MIMO3
1776 static int rs_move_mimo3_to_other(struct iwl_mvm
*mvm
,
1777 struct iwl_lq_sta
*lq_sta
,
1778 struct ieee80211_sta
*sta
, int index
)
1780 s8 is_green
= lq_sta
->is_green
;
1781 struct iwl_scale_tbl_info
*tbl
= &(lq_sta
->lq_info
[lq_sta
->active_tbl
]);
1782 struct iwl_scale_tbl_info
*search_tbl
=
1783 &(lq_sta
->lq_info
[(1 - lq_sta
->active_tbl
)]);
1784 struct iwl_rate_scale_data
*window
= &(tbl
->win
[index
]);
1785 struct ieee80211_sta_ht_cap
*ht_cap
= &sta
->ht_cap
;
1786 u32 sz
= (sizeof(struct iwl_scale_tbl_info
) -
1787 (sizeof(struct iwl_rate_scale_data
) * IWL_RATE_COUNT
));
1789 u8 valid_tx_ant
= mvm
->nvm_data
->valid_tx_ant
;
1790 u8 tx_chains_num
= num_of_ant(valid_tx_ant
);
1792 u8 update_search_tbl_counter
= 0;
1794 start_action
= tbl
->action
;
1796 lq_sta
->action_counter
++;
1797 switch (tbl
->action
) {
1798 case IWL_MIMO3_SWITCH_ANTENNA1
:
1799 case IWL_MIMO3_SWITCH_ANTENNA2
:
1800 IWL_DEBUG_RATE(mvm
, "LQ: MIMO3 toggle Antennas\n");
1802 if (tx_chains_num
<= 3)
1805 if (window
->success_ratio
>= IWL_RS_GOOD_RATIO
)
1808 memcpy(search_tbl
, tbl
, sz
);
1809 if (rs_toggle_antenna(valid_tx_ant
,
1810 &search_tbl
->current_rate
,
1814 case IWL_MIMO3_SWITCH_SISO_A
:
1815 case IWL_MIMO3_SWITCH_SISO_B
:
1816 case IWL_MIMO3_SWITCH_SISO_C
:
1817 IWL_DEBUG_RATE(mvm
, "LQ: MIMO3 switch to SISO\n");
1819 /* Set up new search table for SISO */
1820 memcpy(search_tbl
, tbl
, sz
);
1822 if (tbl
->action
== IWL_MIMO3_SWITCH_SISO_A
)
1823 search_tbl
->ant_type
= ANT_A
;
1824 else if (tbl
->action
== IWL_MIMO3_SWITCH_SISO_B
)
1825 search_tbl
->ant_type
= ANT_B
;
1827 search_tbl
->ant_type
= ANT_C
;
1829 if (!rs_is_valid_ant(valid_tx_ant
,
1830 search_tbl
->ant_type
))
1833 ret
= rs_switch_to_siso(mvm
, lq_sta
, sta
,
1840 case IWL_MIMO3_SWITCH_MIMO2_AB
:
1841 case IWL_MIMO3_SWITCH_MIMO2_AC
:
1842 case IWL_MIMO3_SWITCH_MIMO2_BC
:
1843 IWL_DEBUG_RATE(mvm
, "LQ: MIMO3 switch to MIMO2\n");
1845 memcpy(search_tbl
, tbl
, sz
);
1846 search_tbl
->is_SGI
= 0;
1847 if (tbl
->action
== IWL_MIMO3_SWITCH_MIMO2_AB
)
1848 search_tbl
->ant_type
= ANT_AB
;
1849 else if (tbl
->action
== IWL_MIMO3_SWITCH_MIMO2_AC
)
1850 search_tbl
->ant_type
= ANT_AC
;
1852 search_tbl
->ant_type
= ANT_BC
;
1854 if (!rs_is_valid_ant(valid_tx_ant
,
1855 search_tbl
->ant_type
))
1858 ret
= rs_switch_to_mimo2(mvm
, lq_sta
, sta
,
1865 case IWL_MIMO3_SWITCH_GI
:
1866 if (!tbl
->is_ht40
&& !(ht_cap
->cap
&
1867 IEEE80211_HT_CAP_SGI_20
))
1869 if (tbl
->is_ht40
&& !(ht_cap
->cap
&
1870 IEEE80211_HT_CAP_SGI_40
))
1873 IWL_DEBUG_RATE(mvm
, "LQ: MIMO3 toggle SGI/NGI\n");
1875 /* Set up new search table for MIMO */
1876 memcpy(search_tbl
, tbl
, sz
);
1877 search_tbl
->is_SGI
= !tbl
->is_SGI
;
1878 rs_set_expected_tpt_table(lq_sta
, search_tbl
);
1880 * If active table already uses the fastest possible
1881 * modulation (dual stream with short guard interval),
1882 * and it's working well, there's no need to look
1883 * for a better type of modulation!
1886 s32 tpt
= lq_sta
->last_tpt
/ 100;
1887 if (tpt
>= search_tbl
->expected_tpt
[index
])
1890 search_tbl
->current_rate
=
1891 rate_n_flags_from_tbl(mvm
, search_tbl
,
1893 update_search_tbl_counter
= 1;
1897 if (tbl
->action
> IWL_MIMO3_SWITCH_GI
)
1898 tbl
->action
= IWL_MIMO3_SWITCH_ANTENNA1
;
1900 if (tbl
->action
== start_action
)
1903 search_tbl
->lq_type
= LQ_NONE
;
1906 lq_sta
->search_better_tbl
= 1;
1908 if (tbl
->action
> IWL_MIMO3_SWITCH_GI
)
1909 tbl
->action
= IWL_MIMO3_SWITCH_ANTENNA1
;
1910 if (update_search_tbl_counter
)
1911 search_tbl
->action
= tbl
->action
;
1917 * Check whether we should continue using same modulation mode, or
1918 * begin search for a new mode, based on:
1919 * 1) # tx successes or failures while using this mode
1920 * 2) # times calling this function
1921 * 3) elapsed time in this mode (not used, for now)
1923 static void rs_stay_in_table(struct iwl_lq_sta
*lq_sta
, bool force_search
)
1925 struct iwl_scale_tbl_info
*tbl
;
1928 int flush_interval_passed
= 0;
1929 struct iwl_mvm
*mvm
;
1932 active_tbl
= lq_sta
->active_tbl
;
1934 tbl
= &(lq_sta
->lq_info
[active_tbl
]);
1936 /* If we've been disallowing search, see if we should now allow it */
1937 if (lq_sta
->stay_in_tbl
) {
1938 /* Elapsed time using current modulation mode */
1939 if (lq_sta
->flush_timer
)
1940 flush_interval_passed
=
1942 (unsigned long)(lq_sta
->flush_timer
+
1943 IWL_RATE_SCALE_FLUSH_INTVL
));
1946 * Check if we should allow search for new modulation mode.
1947 * If many frames have failed or succeeded, or we've used
1948 * this same modulation for a long time, allow search, and
1949 * reset history stats that keep track of whether we should
1950 * allow a new search. Also (below) reset all bitmaps and
1951 * stats in active history.
1954 (lq_sta
->total_failed
> lq_sta
->max_failure_limit
) ||
1955 (lq_sta
->total_success
> lq_sta
->max_success_limit
) ||
1956 ((!lq_sta
->search_better_tbl
) &&
1957 (lq_sta
->flush_timer
) && (flush_interval_passed
))) {
1959 "LQ: stay is expired %d %d %d\n",
1960 lq_sta
->total_failed
,
1961 lq_sta
->total_success
,
1962 flush_interval_passed
);
1964 /* Allow search for new mode */
1965 lq_sta
->stay_in_tbl
= 0; /* only place reset */
1966 lq_sta
->total_failed
= 0;
1967 lq_sta
->total_success
= 0;
1968 lq_sta
->flush_timer
= 0;
1970 * Else if we've used this modulation mode enough repetitions
1971 * (regardless of elapsed time or success/failure), reset
1972 * history bitmaps and rate-specific stats for all rates in
1976 lq_sta
->table_count
++;
1977 if (lq_sta
->table_count
>=
1978 lq_sta
->table_count_limit
) {
1979 lq_sta
->table_count
= 0;
1982 "LQ: stay in table clear win\n");
1983 for (i
= 0; i
< IWL_RATE_COUNT
; i
++)
1984 rs_rate_scale_clear_window(
1989 /* If transitioning to allow "search", reset all history
1990 * bitmaps and stats in active table (this will become the new
1991 * "search" table). */
1992 if (!lq_sta
->stay_in_tbl
) {
1993 for (i
= 0; i
< IWL_RATE_COUNT
; i
++)
1994 rs_rate_scale_clear_window(&(tbl
->win
[i
]));
2000 * setup rate table in uCode
2002 static void rs_update_rate_tbl(struct iwl_mvm
*mvm
,
2003 struct iwl_lq_sta
*lq_sta
,
2004 struct iwl_scale_tbl_info
*tbl
,
2005 int index
, u8 is_green
)
2009 /* Update uCode's rate table. */
2010 rate
= rate_n_flags_from_tbl(mvm
, tbl
, index
, is_green
);
2011 rs_fill_link_cmd(mvm
, lq_sta
, rate
);
2012 iwl_mvm_send_lq_cmd(mvm
, &lq_sta
->lq
, CMD_ASYNC
, false);
2016 * Do rate scaling and search for new modulation mode.
2018 static void rs_rate_scale_perform(struct iwl_mvm
*mvm
,
2019 struct sk_buff
*skb
,
2020 struct ieee80211_sta
*sta
,
2021 struct iwl_lq_sta
*lq_sta
)
2023 struct ieee80211_tx_info
*info
= IEEE80211_SKB_CB(skb
);
2024 struct ieee80211_hdr
*hdr
= (struct ieee80211_hdr
*)skb
->data
;
2025 int low
= IWL_RATE_INVALID
;
2026 int high
= IWL_RATE_INVALID
;
2029 struct iwl_rate_scale_data
*window
= NULL
;
2030 int current_tpt
= IWL_INVALID_VALUE
;
2031 int low_tpt
= IWL_INVALID_VALUE
;
2032 int high_tpt
= IWL_INVALID_VALUE
;
2034 s8 scale_action
= 0;
2037 struct iwl_scale_tbl_info
*tbl
, *tbl1
;
2038 u16 rate_scale_index_msk
= 0;
2044 u8 tid
= IWL_MAX_TID_COUNT
;
2045 struct iwl_mvm_sta
*sta_priv
= (void *)sta
->drv_priv
;
2046 struct iwl_mvm_tid_data
*tid_data
;
2048 IWL_DEBUG_RATE(mvm
, "rate scale calculate new rate for skb\n");
2050 /* Send management frames and NO_ACK data using lowest rate. */
2051 /* TODO: this could probably be improved.. */
2052 if (!ieee80211_is_data(hdr
->frame_control
) ||
2053 info
->flags
& IEEE80211_TX_CTL_NO_ACK
)
2056 lq_sta
->supp_rates
= sta
->supp_rates
[lq_sta
->band
];
2058 tid
= rs_tl_add_packet(lq_sta
, hdr
);
2059 if ((tid
!= IWL_MAX_TID_COUNT
) &&
2060 (lq_sta
->tx_agg_tid_en
& (1 << tid
))) {
2061 tid_data
= &sta_priv
->tid_data
[tid
];
2062 if (tid_data
->state
== IWL_AGG_OFF
)
2071 * Select rate-scale / modulation-mode table to work with in
2072 * the rest of this function: "search" if searching for better
2073 * modulation mode, or "active" if doing rate scaling within a mode.
2075 if (!lq_sta
->search_better_tbl
)
2076 active_tbl
= lq_sta
->active_tbl
;
2078 active_tbl
= 1 - lq_sta
->active_tbl
;
2080 tbl
= &(lq_sta
->lq_info
[active_tbl
]);
2081 if (is_legacy(tbl
->lq_type
))
2082 lq_sta
->is_green
= 0;
2084 lq_sta
->is_green
= rs_use_green(sta
);
2085 is_green
= lq_sta
->is_green
;
2087 /* current tx rate */
2088 index
= lq_sta
->last_txrate_idx
;
2090 IWL_DEBUG_RATE(mvm
, "Rate scale index %d for type %d\n", index
,
2093 /* rates available for this association, and for modulation mode */
2094 rate_mask
= rs_get_supported_rates(lq_sta
, hdr
, tbl
->lq_type
);
2096 IWL_DEBUG_RATE(mvm
, "mask 0x%04X\n", rate_mask
);
2098 /* mask with station rate restriction */
2099 if (is_legacy(tbl
->lq_type
)) {
2100 if (lq_sta
->band
== IEEE80211_BAND_5GHZ
)
2101 /* supp_rates has no CCK bits in A mode */
2102 rate_scale_index_msk
= (u16
) (rate_mask
&
2103 (lq_sta
->supp_rates
<< IWL_FIRST_OFDM_RATE
));
2105 rate_scale_index_msk
= (u16
) (rate_mask
&
2106 lq_sta
->supp_rates
);
2109 rate_scale_index_msk
= rate_mask
;
2112 if (!rate_scale_index_msk
)
2113 rate_scale_index_msk
= rate_mask
;
2115 if (!((1 << index
) & rate_scale_index_msk
)) {
2116 IWL_ERR(mvm
, "Current Rate is not valid\n");
2117 if (lq_sta
->search_better_tbl
) {
2118 /* revert to active table if search table is not valid*/
2119 tbl
->lq_type
= LQ_NONE
;
2120 lq_sta
->search_better_tbl
= 0;
2121 tbl
= &(lq_sta
->lq_info
[lq_sta
->active_tbl
]);
2122 /* get "active" rate info */
2123 index
= iwl_hwrate_to_plcp_idx(tbl
->current_rate
);
2124 rs_update_rate_tbl(mvm
, lq_sta
, tbl
, index
, is_green
);
2129 /* Get expected throughput table and history window for current rate */
2130 if (!tbl
->expected_tpt
) {
2131 IWL_ERR(mvm
, "tbl->expected_tpt is NULL\n");
2135 /* force user max rate if set by user */
2136 if ((lq_sta
->max_rate_idx
!= -1) &&
2137 (lq_sta
->max_rate_idx
< index
)) {
2138 index
= lq_sta
->max_rate_idx
;
2140 window
= &(tbl
->win
[index
]);
2144 window
= &(tbl
->win
[index
]);
2147 * If there is not enough history to calculate actual average
2148 * throughput, keep analyzing results of more tx frames, without
2149 * changing rate or mode (bypass most of the rest of this function).
2150 * Set up new rate table in uCode only if old rate is not supported
2151 * in current association (use new rate found above).
2153 fail_count
= window
->counter
- window
->success_counter
;
2154 if ((fail_count
< IWL_RATE_MIN_FAILURE_TH
) &&
2155 (window
->success_counter
< IWL_RATE_MIN_SUCCESS_TH
)) {
2157 "LQ: still below TH. succ=%d total=%d for index %d\n",
2158 window
->success_counter
, window
->counter
, index
);
2160 /* Can't calculate this yet; not enough history */
2161 window
->average_tpt
= IWL_INVALID_VALUE
;
2163 /* Should we stay with this modulation mode,
2164 * or search for a new one? */
2165 rs_stay_in_table(lq_sta
, false);
2169 /* Else we have enough samples; calculate estimate of
2170 * actual average throughput */
2171 if (window
->average_tpt
!= ((window
->success_ratio
*
2172 tbl
->expected_tpt
[index
] + 64) / 128)) {
2174 "expected_tpt should have been calculated by now\n");
2175 window
->average_tpt
= ((window
->success_ratio
*
2176 tbl
->expected_tpt
[index
] + 64) / 128);
2179 /* If we are searching for better modulation mode, check success. */
2180 if (lq_sta
->search_better_tbl
) {
2181 /* If good success, continue using the "search" mode;
2182 * no need to send new link quality command, since we're
2183 * continuing to use the setup that we've been trying. */
2184 if (window
->average_tpt
> lq_sta
->last_tpt
) {
2186 "LQ: SWITCHING TO NEW TABLE suc=%d cur-tpt=%d old-tpt=%d\n",
2187 window
->success_ratio
,
2188 window
->average_tpt
,
2191 if (!is_legacy(tbl
->lq_type
))
2192 lq_sta
->enable_counter
= 1;
2194 /* Swap tables; "search" becomes "active" */
2195 lq_sta
->active_tbl
= active_tbl
;
2196 current_tpt
= window
->average_tpt
;
2197 /* Else poor success; go back to mode in "active" table */
2200 "LQ: GOING BACK TO THE OLD TABLE suc=%d cur-tpt=%d old-tpt=%d\n",
2201 window
->success_ratio
,
2202 window
->average_tpt
,
2205 /* Nullify "search" table */
2206 tbl
->lq_type
= LQ_NONE
;
2208 /* Revert to "active" table */
2209 active_tbl
= lq_sta
->active_tbl
;
2210 tbl
= &(lq_sta
->lq_info
[active_tbl
]);
2212 /* Revert to "active" rate and throughput info */
2213 index
= iwl_hwrate_to_plcp_idx(tbl
->current_rate
);
2214 current_tpt
= lq_sta
->last_tpt
;
2216 /* Need to set up a new rate table in uCode */
2220 /* Either way, we've made a decision; modulation mode
2221 * search is done, allow rate adjustment next time. */
2222 lq_sta
->search_better_tbl
= 0;
2223 done_search
= 1; /* Don't switch modes below! */
2227 /* (Else) not in search of better modulation mode, try for better
2228 * starting rate, while staying in this mode. */
2229 high_low
= rs_get_adjacent_rate(mvm
, index
, rate_scale_index_msk
,
2231 low
= high_low
& 0xff;
2232 high
= (high_low
>> 8) & 0xff;
2234 /* If user set max rate, dont allow higher than user constrain */
2235 if ((lq_sta
->max_rate_idx
!= -1) &&
2236 (lq_sta
->max_rate_idx
< high
))
2237 high
= IWL_RATE_INVALID
;
2239 sr
= window
->success_ratio
;
2241 /* Collect measured throughputs for current and adjacent rates */
2242 current_tpt
= window
->average_tpt
;
2243 if (low
!= IWL_RATE_INVALID
)
2244 low_tpt
= tbl
->win
[low
].average_tpt
;
2245 if (high
!= IWL_RATE_INVALID
)
2246 high_tpt
= tbl
->win
[high
].average_tpt
;
2250 /* Too many failures, decrease rate */
2251 if ((sr
<= IWL_RATE_DECREASE_TH
) || (current_tpt
== 0)) {
2253 "decrease rate because of low success_ratio\n");
2255 /* No throughput measured yet for adjacent rates; try increase. */
2256 } else if ((low_tpt
== IWL_INVALID_VALUE
) &&
2257 (high_tpt
== IWL_INVALID_VALUE
)) {
2258 if (high
!= IWL_RATE_INVALID
&& sr
>= IWL_RATE_INCREASE_TH
)
2260 else if (low
!= IWL_RATE_INVALID
)
2264 /* Both adjacent throughputs are measured, but neither one has better
2265 * throughput; we're using the best rate, don't change it! */
2266 else if ((low_tpt
!= IWL_INVALID_VALUE
) &&
2267 (high_tpt
!= IWL_INVALID_VALUE
) &&
2268 (low_tpt
< current_tpt
) &&
2269 (high_tpt
< current_tpt
))
2272 /* At least one adjacent rate's throughput is measured,
2273 * and may have better performance. */
2275 /* Higher adjacent rate's throughput is measured */
2276 if (high_tpt
!= IWL_INVALID_VALUE
) {
2277 /* Higher rate has better throughput */
2278 if (high_tpt
> current_tpt
&&
2279 sr
>= IWL_RATE_INCREASE_TH
) {
2285 /* Lower adjacent rate's throughput is measured */
2286 } else if (low_tpt
!= IWL_INVALID_VALUE
) {
2287 /* Lower rate has better throughput */
2288 if (low_tpt
> current_tpt
) {
2290 "decrease rate because of low tpt\n");
2292 } else if (sr
>= IWL_RATE_INCREASE_TH
) {
2298 /* Sanity check; asked for decrease, but success rate or throughput
2299 * has been good at old rate. Don't change it. */
2300 if ((scale_action
== -1) && (low
!= IWL_RATE_INVALID
) &&
2301 ((sr
> IWL_RATE_HIGH_TH
) ||
2302 (current_tpt
> (100 * tbl
->expected_tpt
[low
]))))
2305 switch (scale_action
) {
2307 /* Decrease starting rate, update uCode's rate table */
2308 if (low
!= IWL_RATE_INVALID
) {
2315 /* Increase starting rate, update uCode's rate table */
2316 if (high
!= IWL_RATE_INVALID
) {
2329 "choose rate scale index %d action %d low %d high %d type %d\n",
2330 index
, scale_action
, low
, high
, tbl
->lq_type
);
2333 /* Replace uCode's rate table for the destination station. */
2335 rs_update_rate_tbl(mvm
, lq_sta
, tbl
, index
, is_green
);
2337 rs_stay_in_table(lq_sta
, false);
2340 * Search for new modulation mode if we're:
2341 * 1) Not changing rates right now
2342 * 2) Not just finishing up a search
2343 * 3) Allowing a new search
2345 if (!update_lq
&& !done_search
&&
2346 !lq_sta
->stay_in_tbl
&& window
->counter
) {
2347 /* Save current throughput to compare with "search" throughput*/
2348 lq_sta
->last_tpt
= current_tpt
;
2350 /* Select a new "search" modulation mode to try.
2351 * If one is found, set up the new "search" table. */
2352 if (is_legacy(tbl
->lq_type
))
2353 rs_move_legacy_other(mvm
, lq_sta
, sta
, index
);
2354 else if (is_siso(tbl
->lq_type
))
2355 rs_move_siso_to_other(mvm
, lq_sta
, sta
, index
);
2356 else if (is_mimo2(tbl
->lq_type
))
2357 rs_move_mimo2_to_other(mvm
, lq_sta
, sta
, index
);
2359 rs_move_mimo3_to_other(mvm
, lq_sta
, sta
, index
);
2361 /* If new "search" mode was selected, set up in uCode table */
2362 if (lq_sta
->search_better_tbl
) {
2363 /* Access the "search" table, clear its history. */
2364 tbl
= &(lq_sta
->lq_info
[(1 - lq_sta
->active_tbl
)]);
2365 for (i
= 0; i
< IWL_RATE_COUNT
; i
++)
2366 rs_rate_scale_clear_window(&(tbl
->win
[i
]));
2368 /* Use new "search" start rate */
2369 index
= iwl_hwrate_to_plcp_idx(tbl
->current_rate
);
2372 "Switch current mcs: %X index: %d\n",
2373 tbl
->current_rate
, index
);
2374 rs_fill_link_cmd(mvm
, lq_sta
, tbl
->current_rate
);
2375 iwl_mvm_send_lq_cmd(mvm
, &lq_sta
->lq
, CMD_ASYNC
, false);
2381 if (done_search
&& !lq_sta
->stay_in_tbl
) {
2382 /* If the "active" (non-search) mode was legacy,
2383 * and we've tried switching antennas,
2384 * but we haven't been able to try HT modes (not available),
2385 * stay with best antenna legacy modulation for a while
2386 * before next round of mode comparisons. */
2387 tbl1
= &(lq_sta
->lq_info
[lq_sta
->active_tbl
]);
2388 if (is_legacy(tbl1
->lq_type
) && !sta
->ht_cap
.ht_supported
&&
2389 lq_sta
->action_counter
> tbl1
->max_search
) {
2390 IWL_DEBUG_RATE(mvm
, "LQ: STAY in legacy table\n");
2391 rs_set_stay_in_table(mvm
, 1, lq_sta
);
2394 /* If we're in an HT mode, and all 3 mode switch actions
2395 * have been tried and compared, stay in this best modulation
2396 * mode for a while before next round of mode comparisons. */
2397 if (lq_sta
->enable_counter
&&
2398 (lq_sta
->action_counter
>= tbl1
->max_search
)) {
2399 if ((lq_sta
->last_tpt
> IWL_AGG_TPT_THREHOLD
) &&
2400 (lq_sta
->tx_agg_tid_en
& (1 << tid
)) &&
2401 (tid
!= IWL_MAX_TID_COUNT
)) {
2402 tid_data
= &sta_priv
->tid_data
[tid
];
2403 if (tid_data
->state
== IWL_AGG_OFF
) {
2405 "try to aggregate tid %d\n",
2407 rs_tl_turn_on_agg(mvm
, tid
,
2411 rs_set_stay_in_table(mvm
, 0, lq_sta
);
2416 tbl
->current_rate
= rate_n_flags_from_tbl(mvm
, tbl
, index
, is_green
);
2417 lq_sta
->last_txrate_idx
= index
;
2421 * rs_initialize_lq - Initialize a station's hardware rate table
2423 * The uCode's station table contains a table of fallback rates
2424 * for automatic fallback during transmission.
2426 * NOTE: This sets up a default set of values. These will be replaced later
2427 * if the driver's iwl-agn-rs rate scaling algorithm is used, instead of
2430 * NOTE: Run REPLY_ADD_STA command to set up station table entry, before
2431 * calling this function (which runs REPLY_TX_LINK_QUALITY_CMD,
2432 * which requires station table entry to exist).
2434 static void rs_initialize_lq(struct iwl_mvm
*mvm
,
2435 struct ieee80211_sta
*sta
,
2436 struct iwl_lq_sta
*lq_sta
,
2437 enum ieee80211_band band
)
2439 struct iwl_scale_tbl_info
*tbl
;
2443 u8 use_green
= rs_use_green(sta
);
2447 if (!sta
|| !lq_sta
)
2450 i
= lq_sta
->last_txrate_idx
;
2452 valid_tx_ant
= mvm
->nvm_data
->valid_tx_ant
;
2454 if (!lq_sta
->search_better_tbl
)
2455 active_tbl
= lq_sta
->active_tbl
;
2457 active_tbl
= 1 - lq_sta
->active_tbl
;
2459 tbl
= &(lq_sta
->lq_info
[active_tbl
]);
2461 if ((i
< 0) || (i
>= IWL_RATE_COUNT
))
2464 rate
= iwl_rates
[i
].plcp
;
2465 tbl
->ant_type
= first_antenna(valid_tx_ant
);
2466 rate
|= tbl
->ant_type
<< RATE_MCS_ANT_POS
;
2468 if (i
>= IWL_FIRST_CCK_RATE
&& i
<= IWL_LAST_CCK_RATE
)
2469 rate
|= RATE_MCS_CCK_MSK
;
2471 rs_get_tbl_info_from_mcs(rate
, band
, tbl
, &rate_idx
);
2472 if (!rs_is_valid_ant(valid_tx_ant
, tbl
->ant_type
))
2473 rs_toggle_antenna(valid_tx_ant
, &rate
, tbl
);
2475 rate
= rate_n_flags_from_tbl(mvm
, tbl
, rate_idx
, use_green
);
2476 tbl
->current_rate
= rate
;
2477 rs_set_expected_tpt_table(lq_sta
, tbl
);
2478 rs_fill_link_cmd(NULL
, lq_sta
, rate
);
2479 /* TODO restore station should remember the lq cmd */
2480 iwl_mvm_send_lq_cmd(mvm
, &lq_sta
->lq
, CMD_SYNC
, true);
2483 static void rs_get_rate(void *mvm_r
, struct ieee80211_sta
*sta
, void *mvm_sta
,
2484 struct ieee80211_tx_rate_control
*txrc
)
2486 struct sk_buff
*skb
= txrc
->skb
;
2487 struct ieee80211_supported_band
*sband
= txrc
->sband
;
2488 struct iwl_op_mode
*op_mode __maybe_unused
=
2489 (struct iwl_op_mode
*)mvm_r
;
2490 struct iwl_mvm
*mvm __maybe_unused
= IWL_OP_MODE_GET_MVM(op_mode
);
2491 struct ieee80211_tx_info
*info
= IEEE80211_SKB_CB(skb
);
2492 struct iwl_lq_sta
*lq_sta
= mvm_sta
;
2495 IWL_DEBUG_RATE_LIMIT(mvm
, "rate scale calculate new rate for skb\n");
2497 /* Get max rate if user set max rate */
2499 lq_sta
->max_rate_idx
= txrc
->max_rate_idx
;
2500 if ((sband
->band
== IEEE80211_BAND_5GHZ
) &&
2501 (lq_sta
->max_rate_idx
!= -1))
2502 lq_sta
->max_rate_idx
+= IWL_FIRST_OFDM_RATE
;
2503 if ((lq_sta
->max_rate_idx
< 0) ||
2504 (lq_sta
->max_rate_idx
>= IWL_RATE_COUNT
))
2505 lq_sta
->max_rate_idx
= -1;
2508 /* Treat uninitialized rate scaling data same as non-existing. */
2509 if (lq_sta
&& !lq_sta
->drv
) {
2510 IWL_DEBUG_RATE(mvm
, "Rate scaling not initialized yet.\n");
2514 /* Send management frames and NO_ACK data using lowest rate. */
2515 if (rate_control_send_low(sta
, mvm_sta
, txrc
))
2518 rate_idx
= lq_sta
->last_txrate_idx
;
2520 if (lq_sta
->last_rate_n_flags
& RATE_MCS_HT_MSK
) {
2521 rate_idx
-= IWL_FIRST_OFDM_RATE
;
2522 /* 6M and 9M shared same MCS index */
2523 rate_idx
= (rate_idx
> 0) ? (rate_idx
- 1) : 0;
2524 if (rs_extract_rate(lq_sta
->last_rate_n_flags
) >=
2525 IWL_RATE_MIMO3_6M_PLCP
)
2526 rate_idx
= rate_idx
+ (2 * MCS_INDEX_PER_STREAM
);
2527 else if (rs_extract_rate(lq_sta
->last_rate_n_flags
) >=
2528 IWL_RATE_MIMO2_6M_PLCP
)
2529 rate_idx
= rate_idx
+ MCS_INDEX_PER_STREAM
;
2530 info
->control
.rates
[0].flags
= IEEE80211_TX_RC_MCS
;
2531 if (lq_sta
->last_rate_n_flags
& RATE_MCS_SGI_MSK
)
2532 info
->control
.rates
[0].flags
|= IEEE80211_TX_RC_SHORT_GI
;
2533 if (lq_sta
->last_rate_n_flags
& RATE_MCS_CHAN_WIDTH_40
) /* TODO */
2534 info
->control
.rates
[0].flags
|= IEEE80211_TX_RC_40_MHZ_WIDTH
;
2535 if (lq_sta
->last_rate_n_flags
& RATE_HT_MCS_GF_MSK
)
2536 info
->control
.rates
[0].flags
|= IEEE80211_TX_RC_GREEN_FIELD
;
2538 /* Check for invalid rates */
2539 if ((rate_idx
< 0) || (rate_idx
>= IWL_RATE_COUNT_LEGACY
) ||
2540 ((sband
->band
== IEEE80211_BAND_5GHZ
) &&
2541 (rate_idx
< IWL_FIRST_OFDM_RATE
)))
2542 rate_idx
= rate_lowest_index(sband
, sta
);
2543 /* On valid 5 GHz rate, adjust index */
2544 else if (sband
->band
== IEEE80211_BAND_5GHZ
)
2545 rate_idx
-= IWL_FIRST_OFDM_RATE
;
2546 info
->control
.rates
[0].flags
= 0;
2548 info
->control
.rates
[0].idx
= rate_idx
;
2551 static void *rs_alloc_sta(void *mvm_rate
, struct ieee80211_sta
*sta
,
2554 struct iwl_mvm_sta
*sta_priv
= (struct iwl_mvm_sta
*)sta
->drv_priv
;
2555 struct iwl_op_mode
*op_mode __maybe_unused
=
2556 (struct iwl_op_mode
*)mvm_rate
;
2557 struct iwl_mvm
*mvm __maybe_unused
= IWL_OP_MODE_GET_MVM(op_mode
);
2559 IWL_DEBUG_RATE(mvm
, "create station rate scale window\n");
2561 return &sta_priv
->lq_sta
;
2565 * Called after adding a new station to initialize rate scaling
2567 void iwl_mvm_rs_rate_init(struct iwl_mvm
*mvm
, struct ieee80211_sta
*sta
,
2568 enum ieee80211_band band
)
2571 struct ieee80211_hw
*hw
= mvm
->hw
;
2572 struct ieee80211_sta_ht_cap
*ht_cap
= &sta
->ht_cap
;
2573 struct iwl_mvm_sta
*sta_priv
;
2574 struct iwl_lq_sta
*lq_sta
;
2575 struct ieee80211_supported_band
*sband
;
2576 unsigned long supp
; /* must be unsigned long for for_each_set_bit */
2578 sta_priv
= (struct iwl_mvm_sta
*)sta
->drv_priv
;
2579 lq_sta
= &sta_priv
->lq_sta
;
2580 sband
= hw
->wiphy
->bands
[band
];
2582 lq_sta
->lq
.sta_id
= sta_priv
->sta_id
;
2584 for (j
= 0; j
< LQ_SIZE
; j
++)
2585 for (i
= 0; i
< IWL_RATE_COUNT
; i
++)
2586 rs_rate_scale_clear_window(&lq_sta
->lq_info
[j
].win
[i
]);
2588 lq_sta
->flush_timer
= 0;
2589 lq_sta
->supp_rates
= sta
->supp_rates
[sband
->band
];
2590 for (j
= 0; j
< LQ_SIZE
; j
++)
2591 for (i
= 0; i
< IWL_RATE_COUNT
; i
++)
2592 rs_rate_scale_clear_window(&lq_sta
->lq_info
[j
].win
[i
]);
2595 "LQ: *** rate scale station global init for station %d ***\n",
2597 /* TODO: what is a good starting rate for STA? About middle? Maybe not
2598 * the lowest or the highest rate.. Could consider using RSSI from
2599 * previous packets? Need to have IEEE 802.1X auth succeed immediately
2602 lq_sta
->max_rate_idx
= -1;
2603 lq_sta
->missed_rate_counter
= IWL_MISSED_RATE_MAX
;
2604 lq_sta
->is_green
= rs_use_green(sta
);
2605 lq_sta
->band
= sband
->band
;
2607 * active legacy rates as per supported rates bitmap
2609 supp
= sta
->supp_rates
[sband
->band
];
2610 lq_sta
->active_legacy_rate
= 0;
2611 for_each_set_bit(i
, &supp
, BITS_PER_LONG
)
2612 lq_sta
->active_legacy_rate
|= BIT(sband
->bitrates
[i
].hw_value
);
2615 * active_siso_rate mask includes 9 MBits (bit 5), and CCK (bits 0-3),
2616 * supp_rates[] does not; shift to convert format, force 9 MBits off.
2618 lq_sta
->active_siso_rate
= ht_cap
->mcs
.rx_mask
[0] << 1;
2619 lq_sta
->active_siso_rate
|= ht_cap
->mcs
.rx_mask
[0] & 0x1;
2620 lq_sta
->active_siso_rate
&= ~((u16
)0x2);
2621 lq_sta
->active_siso_rate
<<= IWL_FIRST_OFDM_RATE
;
2624 lq_sta
->active_mimo2_rate
= ht_cap
->mcs
.rx_mask
[1] << 1;
2625 lq_sta
->active_mimo2_rate
|= ht_cap
->mcs
.rx_mask
[1] & 0x1;
2626 lq_sta
->active_mimo2_rate
&= ~((u16
)0x2);
2627 lq_sta
->active_mimo2_rate
<<= IWL_FIRST_OFDM_RATE
;
2629 lq_sta
->active_mimo3_rate
= ht_cap
->mcs
.rx_mask
[2] << 1;
2630 lq_sta
->active_mimo3_rate
|= ht_cap
->mcs
.rx_mask
[2] & 0x1;
2631 lq_sta
->active_mimo3_rate
&= ~((u16
)0x2);
2632 lq_sta
->active_mimo3_rate
<<= IWL_FIRST_OFDM_RATE
;
2635 "SISO-RATE=%X MIMO2-RATE=%X MIMO3-RATE=%X\n",
2636 lq_sta
->active_siso_rate
,
2637 lq_sta
->active_mimo2_rate
,
2638 lq_sta
->active_mimo3_rate
);
2640 /* These values will be overridden later */
2641 lq_sta
->lq
.single_stream_ant_msk
=
2642 first_antenna(mvm
->nvm_data
->valid_tx_ant
);
2643 lq_sta
->lq
.dual_stream_ant_msk
=
2644 mvm
->nvm_data
->valid_tx_ant
&
2645 ~first_antenna(mvm
->nvm_data
->valid_tx_ant
);
2646 if (!lq_sta
->lq
.dual_stream_ant_msk
) {
2647 lq_sta
->lq
.dual_stream_ant_msk
= ANT_AB
;
2648 } else if (num_of_ant(mvm
->nvm_data
->valid_tx_ant
) == 2) {
2649 lq_sta
->lq
.dual_stream_ant_msk
=
2650 mvm
->nvm_data
->valid_tx_ant
;
2653 /* as default allow aggregation for all tids */
2654 lq_sta
->tx_agg_tid_en
= IWL_AGG_ALL_TID
;
2657 /* Set last_txrate_idx to lowest rate */
2658 lq_sta
->last_txrate_idx
= rate_lowest_index(sband
, sta
);
2659 if (sband
->band
== IEEE80211_BAND_5GHZ
)
2660 lq_sta
->last_txrate_idx
+= IWL_FIRST_OFDM_RATE
;
2662 #ifdef CONFIG_MAC80211_DEBUGFS
2663 lq_sta
->dbg_fixed_rate
= 0;
2666 rs_initialize_lq(mvm
, sta
, lq_sta
, band
);
2669 static void rs_fill_link_cmd(struct iwl_mvm
*mvm
,
2670 struct iwl_lq_sta
*lq_sta
, u32 new_rate
)
2672 struct iwl_scale_tbl_info tbl_type
;
2675 int repeat_rate
= 0;
2676 u8 ant_toggle_cnt
= 0;
2677 u8 use_ht_possible
= 1;
2678 u8 valid_tx_ant
= 0;
2679 struct iwl_lq_cmd
*lq_cmd
= &lq_sta
->lq
;
2681 /* Override starting rate (index 0) if needed for debug purposes */
2682 rs_dbgfs_set_mcs(lq_sta
, &new_rate
, index
);
2684 /* Interpret new_rate (rate_n_flags) */
2685 rs_get_tbl_info_from_mcs(new_rate
, lq_sta
->band
,
2686 &tbl_type
, &rate_idx
);
2688 /* How many times should we repeat the initial rate? */
2689 if (is_legacy(tbl_type
.lq_type
)) {
2691 repeat_rate
= IWL_NUMBER_TRY
;
2693 repeat_rate
= min(IWL_HT_NUMBER_TRY
,
2694 LINK_QUAL_AGG_DISABLE_START_DEF
- 1);
2697 lq_cmd
->mimo_delim
= is_mimo(tbl_type
.lq_type
) ? 1 : 0;
2699 /* Fill 1st table entry (index 0) */
2700 lq_cmd
->rs_table
[index
] = cpu_to_le32(new_rate
);
2702 if (num_of_ant(tbl_type
.ant_type
) == 1)
2703 lq_cmd
->single_stream_ant_msk
= tbl_type
.ant_type
;
2704 else if (num_of_ant(tbl_type
.ant_type
) == 2)
2705 lq_cmd
->dual_stream_ant_msk
= tbl_type
.ant_type
;
2706 /* otherwise we don't modify the existing value */
2711 valid_tx_ant
= mvm
->nvm_data
->valid_tx_ant
;
2713 /* Fill rest of rate table */
2714 while (index
< LINK_QUAL_MAX_RETRY_NUM
) {
2715 /* Repeat initial/next rate.
2716 * For legacy IWL_NUMBER_TRY == 1, this loop will not execute.
2717 * For HT IWL_HT_NUMBER_TRY == 3, this executes twice. */
2718 while (repeat_rate
> 0 && (index
< LINK_QUAL_MAX_RETRY_NUM
)) {
2719 if (is_legacy(tbl_type
.lq_type
)) {
2720 if (ant_toggle_cnt
< NUM_TRY_BEFORE_ANT_TOGGLE
)
2723 rs_toggle_antenna(valid_tx_ant
,
2724 &new_rate
, &tbl_type
))
2728 /* Override next rate if needed for debug purposes */
2729 rs_dbgfs_set_mcs(lq_sta
, &new_rate
, index
);
2731 /* Fill next table entry */
2732 lq_cmd
->rs_table
[index
] =
2733 cpu_to_le32(new_rate
);
2738 rs_get_tbl_info_from_mcs(new_rate
, lq_sta
->band
, &tbl_type
,
2742 /* Indicate to uCode which entries might be MIMO.
2743 * If initial rate was MIMO, this will finally end up
2744 * as (IWL_HT_NUMBER_TRY * 2), after 2nd pass, otherwise 0. */
2745 if (is_mimo(tbl_type
.lq_type
))
2746 lq_cmd
->mimo_delim
= index
;
2749 new_rate
= rs_get_lower_rate(lq_sta
, &tbl_type
, rate_idx
,
2752 /* How many times should we repeat the next rate? */
2753 if (is_legacy(tbl_type
.lq_type
)) {
2754 if (ant_toggle_cnt
< NUM_TRY_BEFORE_ANT_TOGGLE
)
2757 rs_toggle_antenna(valid_tx_ant
,
2758 &new_rate
, &tbl_type
))
2761 repeat_rate
= IWL_NUMBER_TRY
;
2763 repeat_rate
= IWL_HT_NUMBER_TRY
;
2766 /* Don't allow HT rates after next pass.
2767 * rs_get_lower_rate() will change type to LQ_A or LQ_G. */
2768 use_ht_possible
= 0;
2770 /* Override next rate if needed for debug purposes */
2771 rs_dbgfs_set_mcs(lq_sta
, &new_rate
, index
);
2773 /* Fill next table entry */
2774 lq_cmd
->rs_table
[index
] = cpu_to_le32(new_rate
);
2780 lq_cmd
->agg_frame_cnt_limit
= LINK_QUAL_AGG_FRAME_LIMIT_DEF
;
2781 lq_cmd
->agg_disable_start_th
= LINK_QUAL_AGG_DISABLE_START_DEF
;
2783 lq_cmd
->agg_time_limit
=
2784 cpu_to_le16(LINK_QUAL_AGG_TIME_LIMIT_DEF
);
2787 static void *rs_alloc(struct ieee80211_hw
*hw
, struct dentry
*debugfsdir
)
2791 /* rate scale requires free function to be implemented */
2792 static void rs_free(void *mvm_rate
)
2797 static void rs_free_sta(void *mvm_r
, struct ieee80211_sta
*sta
,
2800 struct iwl_op_mode
*op_mode __maybe_unused
= mvm_r
;
2801 struct iwl_mvm
*mvm __maybe_unused
= IWL_OP_MODE_GET_MVM(op_mode
);
2803 IWL_DEBUG_RATE(mvm
, "enter\n");
2804 IWL_DEBUG_RATE(mvm
, "leave\n");
2807 #ifdef CONFIG_MAC80211_DEBUGFS
2808 static void rs_dbgfs_set_mcs(struct iwl_lq_sta
*lq_sta
,
2809 u32
*rate_n_flags
, int index
)
2811 struct iwl_mvm
*mvm
;
2816 valid_tx_ant
= mvm
->nvm_data
->valid_tx_ant
;
2817 if (lq_sta
->dbg_fixed_rate
) {
2819 ((lq_sta
->dbg_fixed_rate
& RATE_MCS_ANT_ABC_MSK
)
2820 >> RATE_MCS_ANT_POS
);
2821 if ((valid_tx_ant
& ant_sel_tx
) == ant_sel_tx
) {
2822 *rate_n_flags
= lq_sta
->dbg_fixed_rate
;
2823 IWL_DEBUG_RATE(mvm
, "Fixed rate ON\n");
2825 lq_sta
->dbg_fixed_rate
= 0;
2827 "Invalid antenna selection 0x%X, Valid is 0x%X\n",
2828 ant_sel_tx
, valid_tx_ant
);
2829 IWL_DEBUG_RATE(mvm
, "Fixed rate OFF\n");
2832 IWL_DEBUG_RATE(mvm
, "Fixed rate OFF\n");
2836 static ssize_t
rs_sta_dbgfs_scale_table_write(struct file
*file
,
2837 const char __user
*user_buf
, size_t count
, loff_t
*ppos
)
2839 struct iwl_lq_sta
*lq_sta
= file
->private_data
;
2840 struct iwl_mvm
*mvm
;
2847 memset(buf
, 0, sizeof(buf
));
2848 buf_size
= min(count
, sizeof(buf
) - 1);
2849 if (copy_from_user(buf
, user_buf
, buf_size
))
2852 if (sscanf(buf
, "%x", &parsed_rate
) == 1)
2853 lq_sta
->dbg_fixed_rate
= parsed_rate
;
2855 lq_sta
->dbg_fixed_rate
= 0;
2857 rs_program_fix_rate(mvm
, lq_sta
);
2862 static ssize_t
rs_sta_dbgfs_scale_table_read(struct file
*file
,
2863 char __user
*user_buf
, size_t count
, loff_t
*ppos
)
2871 struct iwl_lq_sta
*lq_sta
= file
->private_data
;
2872 struct iwl_mvm
*mvm
;
2873 struct iwl_scale_tbl_info
*tbl
= &(lq_sta
->lq_info
[lq_sta
->active_tbl
]);
2876 buff
= kmalloc(1024, GFP_KERNEL
);
2880 desc
+= sprintf(buff
+desc
, "sta_id %d\n", lq_sta
->lq
.sta_id
);
2881 desc
+= sprintf(buff
+desc
, "failed=%d success=%d rate=0%X\n",
2882 lq_sta
->total_failed
, lq_sta
->total_success
,
2883 lq_sta
->active_legacy_rate
);
2884 desc
+= sprintf(buff
+desc
, "fixed rate 0x%X\n",
2885 lq_sta
->dbg_fixed_rate
);
2886 desc
+= sprintf(buff
+desc
, "valid_tx_ant %s%s%s\n",
2887 (mvm
->nvm_data
->valid_tx_ant
& ANT_A
) ? "ANT_A," : "",
2888 (mvm
->nvm_data
->valid_tx_ant
& ANT_B
) ? "ANT_B," : "",
2889 (mvm
->nvm_data
->valid_tx_ant
& ANT_C
) ? "ANT_C" : "");
2890 desc
+= sprintf(buff
+desc
, "lq type %s\n",
2891 (is_legacy(tbl
->lq_type
)) ? "legacy" : "HT");
2892 if (is_Ht(tbl
->lq_type
)) {
2893 desc
+= sprintf(buff
+desc
, " %s",
2894 (is_siso(tbl
->lq_type
)) ? "SISO" :
2895 ((is_mimo2(tbl
->lq_type
)) ? "MIMO2" : "MIMO3"));
2896 desc
+= sprintf(buff
+desc
, " %s",
2897 (tbl
->is_ht40
) ? "40MHz" : "20MHz");
2898 desc
+= sprintf(buff
+desc
, " %s %s %s\n",
2899 (tbl
->is_SGI
) ? "SGI" : "",
2900 (lq_sta
->is_green
) ? "GF enabled" : "",
2901 (lq_sta
->is_agg
) ? "AGG on" : "");
2903 desc
+= sprintf(buff
+desc
, "last tx rate=0x%X\n",
2904 lq_sta
->last_rate_n_flags
);
2905 desc
+= sprintf(buff
+desc
,
2906 "general: flags=0x%X mimo-d=%d s-ant0x%x d-ant=0x%x\n",
2908 lq_sta
->lq
.mimo_delim
,
2909 lq_sta
->lq
.single_stream_ant_msk
,
2910 lq_sta
->lq
.dual_stream_ant_msk
);
2912 desc
+= sprintf(buff
+desc
,
2913 "agg: time_limit=%d dist_start_th=%d frame_cnt_limit=%d\n",
2914 le16_to_cpu(lq_sta
->lq
.agg_time_limit
),
2915 lq_sta
->lq
.agg_disable_start_th
,
2916 lq_sta
->lq
.agg_frame_cnt_limit
);
2918 desc
+= sprintf(buff
+desc
,
2919 "Start idx [0]=0x%x [1]=0x%x [2]=0x%x [3]=0x%x\n",
2920 lq_sta
->lq
.initial_rate_index
[0],
2921 lq_sta
->lq
.initial_rate_index
[1],
2922 lq_sta
->lq
.initial_rate_index
[2],
2923 lq_sta
->lq
.initial_rate_index
[3]);
2925 for (i
= 0; i
< LINK_QUAL_MAX_RETRY_NUM
; i
++) {
2926 index
= iwl_hwrate_to_plcp_idx(
2927 le32_to_cpu(lq_sta
->lq
.rs_table
[i
]));
2928 if (is_legacy(tbl
->lq_type
)) {
2929 desc
+= sprintf(buff
+desc
, " rate[%d] 0x%X %smbps\n",
2930 i
, le32_to_cpu(lq_sta
->lq
.rs_table
[i
]),
2931 iwl_rate_mcs
[index
].mbps
);
2933 desc
+= sprintf(buff
+desc
,
2934 " rate[%d] 0x%X %smbps (%s)\n",
2935 i
, le32_to_cpu(lq_sta
->lq
.rs_table
[i
]),
2936 iwl_rate_mcs
[index
].mbps
,
2937 iwl_rate_mcs
[index
].mcs
);
2941 ret
= simple_read_from_buffer(user_buf
, count
, ppos
, buff
, desc
);
2946 static const struct file_operations rs_sta_dbgfs_scale_table_ops
= {
2947 .write
= rs_sta_dbgfs_scale_table_write
,
2948 .read
= rs_sta_dbgfs_scale_table_read
,
2949 .open
= simple_open
,
2950 .llseek
= default_llseek
,
2952 static ssize_t
rs_sta_dbgfs_stats_table_read(struct file
*file
,
2953 char __user
*user_buf
, size_t count
, loff_t
*ppos
)
2960 struct iwl_lq_sta
*lq_sta
= file
->private_data
;
2962 buff
= kmalloc(1024, GFP_KERNEL
);
2966 for (i
= 0; i
< LQ_SIZE
; i
++) {
2967 desc
+= sprintf(buff
+desc
,
2968 "%s type=%d SGI=%d HT40=%d DUP=0 GF=%d\n"
2970 lq_sta
->active_tbl
== i
? "*" : "x",
2971 lq_sta
->lq_info
[i
].lq_type
,
2972 lq_sta
->lq_info
[i
].is_SGI
,
2973 lq_sta
->lq_info
[i
].is_ht40
,
2975 lq_sta
->lq_info
[i
].current_rate
);
2976 for (j
= 0; j
< IWL_RATE_COUNT
; j
++) {
2977 desc
+= sprintf(buff
+desc
,
2978 "counter=%d success=%d %%=%d\n",
2979 lq_sta
->lq_info
[i
].win
[j
].counter
,
2980 lq_sta
->lq_info
[i
].win
[j
].success_counter
,
2981 lq_sta
->lq_info
[i
].win
[j
].success_ratio
);
2984 ret
= simple_read_from_buffer(user_buf
, count
, ppos
, buff
, desc
);
2989 static const struct file_operations rs_sta_dbgfs_stats_table_ops
= {
2990 .read
= rs_sta_dbgfs_stats_table_read
,
2991 .open
= simple_open
,
2992 .llseek
= default_llseek
,
2995 static ssize_t
rs_sta_dbgfs_rate_scale_data_read(struct file
*file
,
2996 char __user
*user_buf
, size_t count
, loff_t
*ppos
)
2998 struct iwl_lq_sta
*lq_sta
= file
->private_data
;
2999 struct iwl_scale_tbl_info
*tbl
= &lq_sta
->lq_info
[lq_sta
->active_tbl
];
3003 if (is_Ht(tbl
->lq_type
))
3004 desc
+= sprintf(buff
+desc
,
3005 "Bit Rate= %d Mb/s\n",
3006 tbl
->expected_tpt
[lq_sta
->last_txrate_idx
]);
3008 desc
+= sprintf(buff
+desc
,
3009 "Bit Rate= %d Mb/s\n",
3010 iwl_rates
[lq_sta
->last_txrate_idx
].ieee
>> 1);
3012 return simple_read_from_buffer(user_buf
, count
, ppos
, buff
, desc
);
3015 static const struct file_operations rs_sta_dbgfs_rate_scale_data_ops
= {
3016 .read
= rs_sta_dbgfs_rate_scale_data_read
,
3017 .open
= simple_open
,
3018 .llseek
= default_llseek
,
3021 static void rs_add_debugfs(void *mvm
, void *mvm_sta
, struct dentry
*dir
)
3023 struct iwl_lq_sta
*lq_sta
= mvm_sta
;
3024 lq_sta
->rs_sta_dbgfs_scale_table_file
=
3025 debugfs_create_file("rate_scale_table", S_IRUSR
| S_IWUSR
, dir
,
3026 lq_sta
, &rs_sta_dbgfs_scale_table_ops
);
3027 lq_sta
->rs_sta_dbgfs_stats_table_file
=
3028 debugfs_create_file("rate_stats_table", S_IRUSR
, dir
,
3029 lq_sta
, &rs_sta_dbgfs_stats_table_ops
);
3030 lq_sta
->rs_sta_dbgfs_rate_scale_data_file
=
3031 debugfs_create_file("rate_scale_data", S_IRUSR
, dir
,
3032 lq_sta
, &rs_sta_dbgfs_rate_scale_data_ops
);
3033 lq_sta
->rs_sta_dbgfs_tx_agg_tid_en_file
=
3034 debugfs_create_u8("tx_agg_tid_enable", S_IRUSR
| S_IWUSR
, dir
,
3035 &lq_sta
->tx_agg_tid_en
);
3038 static void rs_remove_debugfs(void *mvm
, void *mvm_sta
)
3040 struct iwl_lq_sta
*lq_sta
= mvm_sta
;
3041 debugfs_remove(lq_sta
->rs_sta_dbgfs_scale_table_file
);
3042 debugfs_remove(lq_sta
->rs_sta_dbgfs_stats_table_file
);
3043 debugfs_remove(lq_sta
->rs_sta_dbgfs_rate_scale_data_file
);
3044 debugfs_remove(lq_sta
->rs_sta_dbgfs_tx_agg_tid_en_file
);
3049 * Initialization of rate scaling information is done by driver after
3050 * the station is added. Since mac80211 calls this function before a
3051 * station is added we ignore it.
3053 static void rs_rate_init_stub(void *mvm_r
,
3054 struct ieee80211_supported_band
*sband
,
3055 struct ieee80211_sta
*sta
, void *mvm_sta
)
3058 static struct rate_control_ops rs_mvm_ops
= {
3061 .tx_status
= rs_tx_status
,
3062 .get_rate
= rs_get_rate
,
3063 .rate_init
= rs_rate_init_stub
,
3066 .alloc_sta
= rs_alloc_sta
,
3067 .free_sta
= rs_free_sta
,
3068 #ifdef CONFIG_MAC80211_DEBUGFS
3069 .add_sta_debugfs
= rs_add_debugfs
,
3070 .remove_sta_debugfs
= rs_remove_debugfs
,
3074 int iwl_mvm_rate_control_register(void)
3076 return ieee80211_rate_control_register(&rs_mvm_ops
);
3079 void iwl_mvm_rate_control_unregister(void)
3081 ieee80211_rate_control_unregister(&rs_mvm_ops
);