1 /******************************************************************************
3 * Copyright(c) 2005 - 2012 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>
41 #include "iwl-op-mode.h"
43 #define RS_NAME "iwl-agn-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 const struct iwl_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 return (u8)(rate_n_flags & RATE_MCS_RATE_MSK);
122 static int iwl_hwrate_to_plcp_idx(u32 rate_n_flags)
127 if (rate_n_flags & RATE_MCS_HT_MSK) {
128 idx = rs_extract_rate(rate_n_flags);
130 if (idx >= IWL_RATE_MIMO3_6M_PLCP)
131 idx = idx - IWL_RATE_MIMO3_6M_PLCP;
132 else if (idx >= IWL_RATE_MIMO2_6M_PLCP)
133 idx = idx - IWL_RATE_MIMO2_6M_PLCP;
135 idx += IWL_FIRST_OFDM_RATE;
136 /* skip 9M not supported in ht*/
137 if (idx >= IWL_RATE_9M_INDEX)
139 if ((idx >= IWL_FIRST_OFDM_RATE) && (idx <= IWL_LAST_OFDM_RATE))
142 /* legacy rate format, search for match in table */
144 for (idx = 0; idx < ARRAY_SIZE(iwl_rates); idx++)
145 if (iwl_rates[idx].plcp ==
146 rs_extract_rate(rate_n_flags))
153 static void rs_rate_scale_perform(struct iwl_priv *priv,
155 struct ieee80211_sta *sta,
156 struct iwl_lq_sta *lq_sta);
157 static void rs_fill_link_cmd(struct iwl_priv *priv,
158 struct iwl_lq_sta *lq_sta, u32 rate_n_flags);
159 static void rs_stay_in_table(struct iwl_lq_sta *lq_sta, bool force_search);
162 #ifdef CONFIG_MAC80211_DEBUGFS
163 static void rs_dbgfs_set_mcs(struct iwl_lq_sta *lq_sta,
164 u32 *rate_n_flags, int index);
166 static void rs_dbgfs_set_mcs(struct iwl_lq_sta *lq_sta,
167 u32 *rate_n_flags, int index)
172 * The following tables contain the expected throughput metrics for all rates
174 * 1, 2, 5.5, 11, 6, 9, 12, 18, 24, 36, 48, 54, 60 MBits
176 * where invalid entries are zeros.
178 * CCK rates are only valid in legacy table and will only be used in G
182 static s32 expected_tpt_legacy[IWL_RATE_COUNT] = {
183 7, 13, 35, 58, 40, 57, 72, 98, 121, 154, 177, 186, 0
186 static s32 expected_tpt_siso20MHz[4][IWL_RATE_COUNT] = {
187 {0, 0, 0, 0, 42, 0, 76, 102, 124, 159, 183, 193, 202}, /* Norm */
188 {0, 0, 0, 0, 46, 0, 82, 110, 132, 168, 192, 202, 210}, /* SGI */
189 {0, 0, 0, 0, 47, 0, 91, 133, 171, 242, 305, 334, 362}, /* AGG */
190 {0, 0, 0, 0, 52, 0, 101, 145, 187, 264, 330, 361, 390}, /* AGG+SGI */
193 static s32 expected_tpt_siso40MHz[4][IWL_RATE_COUNT] = {
194 {0, 0, 0, 0, 77, 0, 127, 160, 184, 220, 242, 250, 257}, /* Norm */
195 {0, 0, 0, 0, 83, 0, 135, 169, 193, 229, 250, 257, 264}, /* SGI */
196 {0, 0, 0, 0, 94, 0, 177, 249, 313, 423, 512, 550, 586}, /* AGG */
197 {0, 0, 0, 0, 104, 0, 193, 270, 338, 454, 545, 584, 620}, /* AGG+SGI */
200 static s32 expected_tpt_mimo2_20MHz[4][IWL_RATE_COUNT] = {
201 {0, 0, 0, 0, 74, 0, 123, 155, 179, 214, 236, 244, 251}, /* Norm */
202 {0, 0, 0, 0, 81, 0, 131, 164, 188, 223, 243, 251, 257}, /* SGI */
203 {0, 0, 0, 0, 89, 0, 167, 235, 296, 402, 488, 526, 560}, /* AGG */
204 {0, 0, 0, 0, 97, 0, 182, 255, 320, 431, 520, 558, 593}, /* AGG+SGI*/
207 static s32 expected_tpt_mimo2_40MHz[4][IWL_RATE_COUNT] = {
208 {0, 0, 0, 0, 123, 0, 182, 214, 235, 264, 279, 285, 289}, /* Norm */
209 {0, 0, 0, 0, 131, 0, 191, 222, 242, 270, 284, 289, 293}, /* SGI */
210 {0, 0, 0, 0, 171, 0, 305, 410, 496, 634, 731, 771, 805}, /* AGG */
211 {0, 0, 0, 0, 186, 0, 329, 439, 527, 667, 764, 803, 838}, /* AGG+SGI */
214 static s32 expected_tpt_mimo3_20MHz[4][IWL_RATE_COUNT] = {
215 {0, 0, 0, 0, 99, 0, 153, 186, 208, 239, 256, 263, 268}, /* Norm */
216 {0, 0, 0, 0, 106, 0, 162, 194, 215, 246, 262, 268, 273}, /* SGI */
217 {0, 0, 0, 0, 134, 0, 249, 346, 431, 574, 685, 732, 775}, /* AGG */
218 {0, 0, 0, 0, 148, 0, 272, 376, 465, 614, 727, 775, 818}, /* AGG+SGI */
221 static s32 expected_tpt_mimo3_40MHz[4][IWL_RATE_COUNT] = {
222 {0, 0, 0, 0, 152, 0, 211, 239, 255, 279, 290, 294, 297}, /* Norm */
223 {0, 0, 0, 0, 160, 0, 219, 245, 261, 284, 294, 297, 300}, /* SGI */
224 {0, 0, 0, 0, 254, 0, 443, 584, 695, 868, 984, 1030, 1070}, /* AGG */
225 {0, 0, 0, 0, 277, 0, 478, 624, 737, 911, 1026, 1070, 1109}, /* AGG+SGI */
229 static const struct iwl_rate_mcs_info iwl_rate_mcs[IWL_RATE_COUNT] = {
238 { "24", "16QAM 1/2"},
239 { "36", "16QAM 3/4"},
240 { "48", "64QAM 2/3"},
241 { "54", "64QAM 3/4"},
242 { "60", "64QAM 5/6"},
245 #define MCS_INDEX_PER_STREAM (8)
247 static void rs_rate_scale_clear_window(struct iwl_rate_scale_data *window)
250 window->success_counter = 0;
251 window->success_ratio = IWL_INVALID_VALUE;
253 window->average_tpt = IWL_INVALID_VALUE;
257 static inline u8 rs_is_valid_ant(u8 valid_antenna, u8 ant_type)
259 return (ant_type & valid_antenna) == ant_type;
263 * removes the old data from the statistics. All data that is older than
264 * TID_MAX_TIME_DIFF, will be deleted.
266 static void rs_tl_rm_old_stats(struct iwl_traffic_load *tl, u32 curr_time)
268 /* The oldest age we want to keep */
269 u32 oldest_time = curr_time - TID_MAX_TIME_DIFF;
271 while (tl->queue_count &&
272 (tl->time_stamp < oldest_time)) {
273 tl->total -= tl->packet_count[tl->head];
274 tl->packet_count[tl->head] = 0;
275 tl->time_stamp += TID_QUEUE_CELL_SPACING;
278 if (tl->head >= TID_QUEUE_MAX_SIZE)
284 * increment traffic load value for tid and also remove
285 * any old values if passed the certain time period
287 static u8 rs_tl_add_packet(struct iwl_lq_sta *lq_data,
288 struct ieee80211_hdr *hdr)
290 u32 curr_time = jiffies_to_msecs(jiffies);
293 struct iwl_traffic_load *tl = NULL;
296 if (ieee80211_is_data_qos(hdr->frame_control)) {
297 u8 *qc = ieee80211_get_qos_ctl(hdr);
300 return IWL_MAX_TID_COUNT;
302 if (unlikely(tid >= IWL_MAX_TID_COUNT))
303 return IWL_MAX_TID_COUNT;
305 tl = &lq_data->load[tid];
307 curr_time -= curr_time % TID_ROUND_VALUE;
309 /* Happens only for the first packet. Initialize the data */
310 if (!(tl->queue_count)) {
312 tl->time_stamp = curr_time;
315 tl->packet_count[0] = 1;
316 return IWL_MAX_TID_COUNT;
319 time_diff = TIME_WRAP_AROUND(tl->time_stamp, curr_time);
320 index = time_diff / TID_QUEUE_CELL_SPACING;
322 /* The history is too long: remove data that is older than */
323 /* TID_MAX_TIME_DIFF */
324 if (index >= TID_QUEUE_MAX_SIZE)
325 rs_tl_rm_old_stats(tl, curr_time);
327 index = (tl->head + index) % TID_QUEUE_MAX_SIZE;
328 tl->packet_count[index] = tl->packet_count[index] + 1;
329 tl->total = tl->total + 1;
331 if ((index + 1) > tl->queue_count)
332 tl->queue_count = index + 1;
337 #ifdef CONFIG_MAC80211_DEBUGFS
339 * Program the device to use fixed rate for frame transmit
340 * This is for debugging/testing only
341 * once the device start use fixed rate, we need to reload the module
342 * to being back the normal operation.
344 static void rs_program_fix_rate(struct iwl_priv *priv,
345 struct iwl_lq_sta *lq_sta)
347 struct iwl_station_priv *sta_priv =
348 container_of(lq_sta, struct iwl_station_priv, lq_sta);
349 struct iwl_rxon_context *ctx = sta_priv->ctx;
351 lq_sta->active_legacy_rate = 0x0FFF; /* 1 - 54 MBits, includes CCK */
352 lq_sta->active_siso_rate = 0x1FD0; /* 6 - 60 MBits, no 9, no CCK */
353 lq_sta->active_mimo2_rate = 0x1FD0; /* 6 - 60 MBits, no 9, no CCK */
354 lq_sta->active_mimo3_rate = 0x1FD0; /* 6 - 60 MBits, no 9, no CCK */
356 #ifdef CONFIG_IWLWIFI_DEVICE_TESTMODE
357 /* testmode has higher priority to overwirte the fixed rate */
358 if (priv->tm_fixed_rate)
359 lq_sta->dbg_fixed_rate = priv->tm_fixed_rate;
362 IWL_DEBUG_RATE(priv, "sta_id %d rate 0x%X\n",
363 lq_sta->lq.sta_id, lq_sta->dbg_fixed_rate);
365 if (lq_sta->dbg_fixed_rate) {
366 rs_fill_link_cmd(NULL, lq_sta, lq_sta->dbg_fixed_rate);
367 iwl_send_lq_cmd(lq_sta->drv, ctx, &lq_sta->lq, CMD_ASYNC,
374 get the traffic load value for tid
376 static u32 rs_tl_get_load(struct iwl_lq_sta *lq_data, u8 tid)
378 u32 curr_time = jiffies_to_msecs(jiffies);
381 struct iwl_traffic_load *tl = NULL;
383 if (tid >= IWL_MAX_TID_COUNT)
386 tl = &(lq_data->load[tid]);
388 curr_time -= curr_time % TID_ROUND_VALUE;
390 if (!(tl->queue_count))
393 time_diff = TIME_WRAP_AROUND(tl->time_stamp, curr_time);
394 index = time_diff / TID_QUEUE_CELL_SPACING;
396 /* The history is too long: remove data that is older than */
397 /* TID_MAX_TIME_DIFF */
398 if (index >= TID_QUEUE_MAX_SIZE)
399 rs_tl_rm_old_stats(tl, curr_time);
404 static int rs_tl_turn_on_agg_for_tid(struct iwl_priv *priv,
405 struct iwl_lq_sta *lq_data, u8 tid,
406 struct ieee80211_sta *sta)
412 * Don't create TX aggregation sessions when in high
413 * BT traffic, as they would just be disrupted by BT.
415 if (priv->bt_traffic_load >= IWL_BT_COEX_TRAFFIC_LOAD_HIGH) {
416 IWL_ERR(priv, "BT traffic (%d), no aggregation allowed\n",
417 priv->bt_traffic_load);
421 load = rs_tl_get_load(lq_data, tid);
423 if ((iwlagn_mod_params.auto_agg) || (load > IWL_AGG_LOAD_THRESHOLD)) {
424 IWL_DEBUG_HT(priv, "Starting Tx agg: STA: %pM tid: %d\n",
426 ret = ieee80211_start_tx_ba_session(sta, tid, 5000);
427 if (ret == -EAGAIN) {
429 * driver and mac80211 is out of sync
430 * this might be cause by reloading firmware
431 * stop the tx ba session here
433 IWL_ERR(priv, "Fail start Tx agg on tid: %d\n",
435 ieee80211_stop_tx_ba_session(sta, tid);
438 IWL_DEBUG_HT(priv, "Aggregation not enabled for tid %d "
439 "because load = %u\n", tid, load);
444 static void rs_tl_turn_on_agg(struct iwl_priv *priv, u8 tid,
445 struct iwl_lq_sta *lq_data,
446 struct ieee80211_sta *sta)
448 if (tid < IWL_MAX_TID_COUNT)
449 rs_tl_turn_on_agg_for_tid(priv, lq_data, tid, sta);
451 IWL_ERR(priv, "tid exceeds max TID count: %d/%d\n",
452 tid, IWL_MAX_TID_COUNT);
455 static inline int get_num_of_ant_from_rate(u32 rate_n_flags)
457 return !!(rate_n_flags & RATE_MCS_ANT_A_MSK) +
458 !!(rate_n_flags & RATE_MCS_ANT_B_MSK) +
459 !!(rate_n_flags & RATE_MCS_ANT_C_MSK);
463 * Static function to get the expected throughput from an iwl_scale_tbl_info
464 * that wraps a NULL pointer check
466 static s32 get_expected_tpt(struct iwl_scale_tbl_info *tbl, int rs_index)
468 if (tbl->expected_tpt)
469 return tbl->expected_tpt[rs_index];
474 * rs_collect_tx_data - Update the success/failure sliding window
476 * We keep a sliding window of the last 62 packets transmitted
477 * at this rate. window->data contains the bitmask of successful
480 static int rs_collect_tx_data(struct iwl_scale_tbl_info *tbl,
481 int scale_index, int attempts, int successes)
483 struct iwl_rate_scale_data *window = NULL;
484 static const u64 mask = (((u64)1) << (IWL_RATE_MAX_WINDOW - 1));
487 if (scale_index < 0 || scale_index >= IWL_RATE_COUNT)
490 /* Select window for current tx bit rate */
491 window = &(tbl->win[scale_index]);
493 /* Get expected throughput */
494 tpt = get_expected_tpt(tbl, scale_index);
497 * Keep track of only the latest 62 tx frame attempts in this rate's
498 * history window; anything older isn't really relevant any more.
499 * If we have filled up the sliding window, drop the oldest attempt;
500 * if the oldest attempt (highest bit in bitmap) shows "success",
501 * subtract "1" from the success counter (this is the main reason
502 * we keep these bitmaps!).
504 while (attempts > 0) {
505 if (window->counter >= IWL_RATE_MAX_WINDOW) {
507 /* remove earliest */
508 window->counter = IWL_RATE_MAX_WINDOW - 1;
510 if (window->data & mask) {
511 window->data &= ~mask;
512 window->success_counter--;
516 /* Increment frames-attempted counter */
519 /* Shift bitmap by one frame to throw away oldest history */
522 /* Mark the most recent #successes attempts as successful */
524 window->success_counter++;
532 /* Calculate current success ratio, avoid divide-by-0! */
533 if (window->counter > 0)
534 window->success_ratio = 128 * (100 * window->success_counter)
537 window->success_ratio = IWL_INVALID_VALUE;
539 fail_count = window->counter - window->success_counter;
541 /* Calculate average throughput, if we have enough history. */
542 if ((fail_count >= IWL_RATE_MIN_FAILURE_TH) ||
543 (window->success_counter >= IWL_RATE_MIN_SUCCESS_TH))
544 window->average_tpt = (window->success_ratio * tpt + 64) / 128;
546 window->average_tpt = IWL_INVALID_VALUE;
548 /* Tag this window as having been updated */
549 window->stamp = jiffies;
555 * Fill uCode API rate_n_flags field, based on "search" or "active" table.
557 /* FIXME:RS:remove this function and put the flags statically in the table */
558 static u32 rate_n_flags_from_tbl(struct iwl_priv *priv,
559 struct iwl_scale_tbl_info *tbl,
560 int index, u8 use_green)
562 u32 rate_n_flags = 0;
564 if (is_legacy(tbl->lq_type)) {
565 rate_n_flags = iwl_rates[index].plcp;
566 if (index >= IWL_FIRST_CCK_RATE && index <= IWL_LAST_CCK_RATE)
567 rate_n_flags |= RATE_MCS_CCK_MSK;
569 } else if (is_Ht(tbl->lq_type)) {
570 if (index > IWL_LAST_OFDM_RATE) {
571 IWL_ERR(priv, "Invalid HT rate index %d\n", index);
572 index = IWL_LAST_OFDM_RATE;
574 rate_n_flags = RATE_MCS_HT_MSK;
576 if (is_siso(tbl->lq_type))
577 rate_n_flags |= iwl_rates[index].plcp_siso;
578 else if (is_mimo2(tbl->lq_type))
579 rate_n_flags |= iwl_rates[index].plcp_mimo2;
581 rate_n_flags |= iwl_rates[index].plcp_mimo3;
583 IWL_ERR(priv, "Invalid tbl->lq_type %d\n", tbl->lq_type);
586 rate_n_flags |= ((tbl->ant_type << RATE_MCS_ANT_POS) &
587 RATE_MCS_ANT_ABC_MSK);
589 if (is_Ht(tbl->lq_type)) {
592 rate_n_flags |= RATE_MCS_DUP_MSK;
594 rate_n_flags |= RATE_MCS_HT40_MSK;
597 rate_n_flags |= RATE_MCS_SGI_MSK;
600 rate_n_flags |= RATE_MCS_GF_MSK;
601 if (is_siso(tbl->lq_type) && tbl->is_SGI) {
602 rate_n_flags &= ~RATE_MCS_SGI_MSK;
603 IWL_ERR(priv, "GF was set with SGI:SISO\n");
611 * Interpret uCode API's rate_n_flags format,
612 * fill "search" or "active" tx mode table.
614 static int rs_get_tbl_info_from_mcs(const u32 rate_n_flags,
615 enum ieee80211_band band,
616 struct iwl_scale_tbl_info *tbl,
619 u32 ant_msk = (rate_n_flags & RATE_MCS_ANT_ABC_MSK);
620 u8 num_of_ant = get_num_of_ant_from_rate(rate_n_flags);
623 memset(tbl, 0, sizeof(struct iwl_scale_tbl_info));
624 *rate_idx = iwl_hwrate_to_plcp_idx(rate_n_flags);
626 if (*rate_idx == IWL_RATE_INVALID) {
630 tbl->is_SGI = 0; /* default legacy setup */
633 tbl->ant_type = (ant_msk >> RATE_MCS_ANT_POS);
634 tbl->lq_type = LQ_NONE;
635 tbl->max_search = IWL_MAX_SEARCH;
637 /* legacy rate format */
638 if (!(rate_n_flags & RATE_MCS_HT_MSK)) {
639 if (num_of_ant == 1) {
640 if (band == IEEE80211_BAND_5GHZ)
647 if (rate_n_flags & RATE_MCS_SGI_MSK)
650 if ((rate_n_flags & RATE_MCS_HT40_MSK) ||
651 (rate_n_flags & RATE_MCS_DUP_MSK))
654 if (rate_n_flags & RATE_MCS_DUP_MSK)
657 mcs = rs_extract_rate(rate_n_flags);
660 if (mcs <= IWL_RATE_SISO_60M_PLCP) {
662 tbl->lq_type = LQ_SISO; /*else NONE*/
664 } else if (mcs <= IWL_RATE_MIMO2_60M_PLCP) {
666 tbl->lq_type = LQ_MIMO2;
669 if (num_of_ant == 3) {
670 tbl->max_search = IWL_MAX_11N_MIMO3_SEARCH;
671 tbl->lq_type = LQ_MIMO3;
678 /* switch to another antenna/antennas and return 1 */
679 /* if no other valid antenna found, return 0 */
680 static int rs_toggle_antenna(u32 valid_ant, u32 *rate_n_flags,
681 struct iwl_scale_tbl_info *tbl)
685 if (!tbl->ant_type || tbl->ant_type > ANT_ABC)
688 if (!rs_is_valid_ant(valid_ant, tbl->ant_type))
691 new_ant_type = ant_toggle_lookup[tbl->ant_type];
693 while ((new_ant_type != tbl->ant_type) &&
694 !rs_is_valid_ant(valid_ant, new_ant_type))
695 new_ant_type = ant_toggle_lookup[new_ant_type];
697 if (new_ant_type == tbl->ant_type)
700 tbl->ant_type = new_ant_type;
701 *rate_n_flags &= ~RATE_MCS_ANT_ABC_MSK;
702 *rate_n_flags |= new_ant_type << RATE_MCS_ANT_POS;
707 * Green-field mode is valid if the station supports it and
708 * there are no non-GF stations present in the BSS.
710 static bool rs_use_green(struct ieee80211_sta *sta)
712 struct iwl_station_priv *sta_priv = (void *)sta->drv_priv;
713 struct iwl_rxon_context *ctx = sta_priv->ctx;
715 return (sta->ht_cap.cap & IEEE80211_HT_CAP_GRN_FLD) &&
716 !(ctx->ht.non_gf_sta_present);
720 * rs_get_supported_rates - get the available rates
722 * if management frame or broadcast frame only return
723 * basic available rates.
726 static u16 rs_get_supported_rates(struct iwl_lq_sta *lq_sta,
727 struct ieee80211_hdr *hdr,
728 enum iwl_table_type rate_type)
730 if (is_legacy(rate_type)) {
731 return lq_sta->active_legacy_rate;
733 if (is_siso(rate_type))
734 return lq_sta->active_siso_rate;
735 else if (is_mimo2(rate_type))
736 return lq_sta->active_mimo2_rate;
738 return lq_sta->active_mimo3_rate;
742 static u16 rs_get_adjacent_rate(struct iwl_priv *priv, u8 index, u16 rate_mask,
745 u8 high = IWL_RATE_INVALID;
746 u8 low = IWL_RATE_INVALID;
748 /* 802.11A or ht walks to the next literal adjacent rate in
750 if (is_a_band(rate_type) || !is_legacy(rate_type)) {
754 /* Find the previous rate that is in the rate mask */
756 for (mask = (1 << i); i >= 0; i--, mask >>= 1) {
757 if (rate_mask & mask) {
763 /* Find the next rate that is in the rate mask */
765 for (mask = (1 << i); i < IWL_RATE_COUNT; i++, mask <<= 1) {
766 if (rate_mask & mask) {
772 return (high << 8) | low;
776 while (low != IWL_RATE_INVALID) {
777 low = iwl_rates[low].prev_rs;
778 if (low == IWL_RATE_INVALID)
780 if (rate_mask & (1 << low))
782 IWL_DEBUG_RATE(priv, "Skipping masked lower rate: %d\n", low);
786 while (high != IWL_RATE_INVALID) {
787 high = iwl_rates[high].next_rs;
788 if (high == IWL_RATE_INVALID)
790 if (rate_mask & (1 << high))
792 IWL_DEBUG_RATE(priv, "Skipping masked higher rate: %d\n", high);
795 return (high << 8) | low;
798 static u32 rs_get_lower_rate(struct iwl_lq_sta *lq_sta,
799 struct iwl_scale_tbl_info *tbl,
800 u8 scale_index, u8 ht_possible)
805 u8 switch_to_legacy = 0;
806 u8 is_green = lq_sta->is_green;
807 struct iwl_priv *priv = lq_sta->drv;
809 /* check if we need to switch from HT to legacy rates.
810 * assumption is that mandatory rates (1Mbps or 6Mbps)
811 * are always supported (spec demand) */
812 if (!is_legacy(tbl->lq_type) && (!ht_possible || !scale_index)) {
813 switch_to_legacy = 1;
814 scale_index = rs_ht_to_legacy[scale_index];
815 if (lq_sta->band == IEEE80211_BAND_5GHZ)
820 if (num_of_ant(tbl->ant_type) > 1)
822 first_antenna(hw_params(priv).valid_tx_ant);
826 tbl->max_search = IWL_MAX_SEARCH;
829 rate_mask = rs_get_supported_rates(lq_sta, NULL, tbl->lq_type);
831 /* Mask with station rate restriction */
832 if (is_legacy(tbl->lq_type)) {
833 /* supp_rates has no CCK bits in A mode */
834 if (lq_sta->band == IEEE80211_BAND_5GHZ)
835 rate_mask = (u16)(rate_mask &
836 (lq_sta->supp_rates << IWL_FIRST_OFDM_RATE));
838 rate_mask = (u16)(rate_mask & lq_sta->supp_rates);
841 /* If we switched from HT to legacy, check current rate */
842 if (switch_to_legacy && (rate_mask & (1 << scale_index))) {
847 high_low = rs_get_adjacent_rate(lq_sta->drv, scale_index, rate_mask,
849 low = high_low & 0xff;
851 if (low == IWL_RATE_INVALID)
855 return rate_n_flags_from_tbl(lq_sta->drv, tbl, low, is_green);
859 * Simple function to compare two rate scale table types
861 static bool table_type_matches(struct iwl_scale_tbl_info *a,
862 struct iwl_scale_tbl_info *b)
864 return (a->lq_type == b->lq_type) && (a->ant_type == b->ant_type) &&
865 (a->is_SGI == b->is_SGI);
868 static void rs_bt_update_lq(struct iwl_priv *priv, struct iwl_rxon_context *ctx,
869 struct iwl_lq_sta *lq_sta)
871 struct iwl_scale_tbl_info *tbl;
872 bool full_concurrent = priv->bt_full_concurrent;
874 if (priv->bt_ant_couple_ok) {
876 * Is there a need to switch between
877 * full concurrency and 3-wire?
879 if (priv->bt_ci_compliance && priv->bt_ant_couple_ok)
880 full_concurrent = true;
882 full_concurrent = false;
884 if ((priv->bt_traffic_load != priv->last_bt_traffic_load) ||
885 (priv->bt_full_concurrent != full_concurrent)) {
886 priv->bt_full_concurrent = full_concurrent;
888 /* Update uCode's rate table. */
889 tbl = &(lq_sta->lq_info[lq_sta->active_tbl]);
890 rs_fill_link_cmd(priv, lq_sta, tbl->current_rate);
891 iwl_send_lq_cmd(priv, ctx, &lq_sta->lq, CMD_ASYNC, false);
893 queue_work(priv->workqueue, &priv->bt_full_concurrency);
898 * mac80211 sends us Tx status
900 static void rs_tx_status(void *priv_r, struct ieee80211_supported_band *sband,
901 struct ieee80211_sta *sta, void *priv_sta,
906 int rs_index, mac_index, i;
907 struct iwl_lq_sta *lq_sta = priv_sta;
908 struct iwl_link_quality_cmd *table;
909 struct ieee80211_hdr *hdr = (struct ieee80211_hdr *)skb->data;
910 struct iwl_op_mode *op_mode = (struct iwl_op_mode *)priv_r;
911 struct iwl_priv *priv = IWL_OP_MODE_GET_DVM(op_mode);
912 struct ieee80211_tx_info *info = IEEE80211_SKB_CB(skb);
913 enum mac80211_rate_control_flags mac_flags;
915 struct iwl_scale_tbl_info tbl_type;
916 struct iwl_scale_tbl_info *curr_tbl, *other_tbl, *tmp_tbl;
917 struct iwl_station_priv *sta_priv = (void *)sta->drv_priv;
918 struct iwl_rxon_context *ctx = sta_priv->ctx;
920 IWL_DEBUG_RATE_LIMIT(priv, "get frame ack response, update rate scale window\n");
922 /* Treat uninitialized rate scaling data same as non-existing. */
924 IWL_DEBUG_RATE(priv, "Station rate scaling not created yet.\n");
926 } else if (!lq_sta->drv) {
927 IWL_DEBUG_RATE(priv, "Rate scaling not initialized yet.\n");
931 if (!ieee80211_is_data(hdr->frame_control) ||
932 info->flags & IEEE80211_TX_CTL_NO_ACK)
935 /* This packet was aggregated but doesn't carry status info */
936 if ((info->flags & IEEE80211_TX_CTL_AMPDU) &&
937 !(info->flags & IEEE80211_TX_STAT_AMPDU))
941 * Ignore this Tx frame response if its initial rate doesn't match
942 * that of latest Link Quality command. There may be stragglers
943 * from a previous Link Quality command, but we're no longer interested
944 * in those; they're either from the "active" mode while we're trying
945 * to check "search" mode, or a prior "search" mode after we've moved
946 * to a new "search" mode (which might become the new "active" mode).
949 tx_rate = le32_to_cpu(table->rs_table[0].rate_n_flags);
950 rs_get_tbl_info_from_mcs(tx_rate, priv->band, &tbl_type, &rs_index);
951 if (priv->band == IEEE80211_BAND_5GHZ)
952 rs_index -= IWL_FIRST_OFDM_RATE;
953 mac_flags = info->status.rates[0].flags;
954 mac_index = info->status.rates[0].idx;
955 /* For HT packets, map MCS to PLCP */
956 if (mac_flags & IEEE80211_TX_RC_MCS) {
957 mac_index &= RATE_MCS_CODE_MSK; /* Remove # of streams */
958 if (mac_index >= (IWL_RATE_9M_INDEX - IWL_FIRST_OFDM_RATE))
961 * mac80211 HT index is always zero-indexed; we need to move
962 * HT OFDM rates after CCK rates in 2.4 GHz band
964 if (priv->band == IEEE80211_BAND_2GHZ)
965 mac_index += IWL_FIRST_OFDM_RATE;
967 /* Here we actually compare this rate to the latest LQ command */
968 if ((mac_index < 0) ||
969 (tbl_type.is_SGI != !!(mac_flags & IEEE80211_TX_RC_SHORT_GI)) ||
970 (tbl_type.is_ht40 != !!(mac_flags & IEEE80211_TX_RC_40_MHZ_WIDTH)) ||
971 (tbl_type.is_dup != !!(mac_flags & IEEE80211_TX_RC_DUP_DATA)) ||
972 (tbl_type.ant_type != info->antenna_sel_tx) ||
973 (!!(tx_rate & RATE_MCS_HT_MSK) != !!(mac_flags & IEEE80211_TX_RC_MCS)) ||
974 (!!(tx_rate & RATE_MCS_GF_MSK) != !!(mac_flags & IEEE80211_TX_RC_GREEN_FIELD)) ||
975 (rs_index != mac_index)) {
976 IWL_DEBUG_RATE(priv, "initial rate %d does not match %d (0x%x)\n", mac_index, rs_index, tx_rate);
978 * Since rates mis-match, the last LQ command may have failed.
979 * After IWL_MISSED_RATE_MAX mis-matches, resync the uCode with
982 lq_sta->missed_rate_counter++;
983 if (lq_sta->missed_rate_counter > IWL_MISSED_RATE_MAX) {
984 lq_sta->missed_rate_counter = 0;
985 iwl_send_lq_cmd(priv, ctx, &lq_sta->lq, CMD_ASYNC, false);
987 /* Regardless, ignore this status info for outdated rate */
990 /* Rate did match, so reset the missed_rate_counter */
991 lq_sta->missed_rate_counter = 0;
993 /* Figure out if rate scale algorithm is in active or search table */
994 if (table_type_matches(&tbl_type,
995 &(lq_sta->lq_info[lq_sta->active_tbl]))) {
996 curr_tbl = &(lq_sta->lq_info[lq_sta->active_tbl]);
997 other_tbl = &(lq_sta->lq_info[1 - lq_sta->active_tbl]);
998 } else if (table_type_matches(&tbl_type,
999 &lq_sta->lq_info[1 - lq_sta->active_tbl])) {
1000 curr_tbl = &(lq_sta->lq_info[1 - lq_sta->active_tbl]);
1001 other_tbl = &(lq_sta->lq_info[lq_sta->active_tbl]);
1003 IWL_DEBUG_RATE(priv, "Neither active nor search matches tx rate\n");
1004 tmp_tbl = &(lq_sta->lq_info[lq_sta->active_tbl]);
1005 IWL_DEBUG_RATE(priv, "active- lq:%x, ant:%x, SGI:%d\n",
1006 tmp_tbl->lq_type, tmp_tbl->ant_type, tmp_tbl->is_SGI);
1007 tmp_tbl = &(lq_sta->lq_info[1 - lq_sta->active_tbl]);
1008 IWL_DEBUG_RATE(priv, "search- lq:%x, ant:%x, SGI:%d\n",
1009 tmp_tbl->lq_type, tmp_tbl->ant_type, tmp_tbl->is_SGI);
1010 IWL_DEBUG_RATE(priv, "actual- lq:%x, ant:%x, SGI:%d\n",
1011 tbl_type.lq_type, tbl_type.ant_type, tbl_type.is_SGI);
1013 * no matching table found, let's by-pass the data collection
1014 * and continue to perform rate scale to find the rate table
1016 rs_stay_in_table(lq_sta, true);
1021 * Updating the frame history depends on whether packets were
1024 * For aggregation, all packets were transmitted at the same rate, the
1025 * first index into rate scale table.
1027 if (info->flags & IEEE80211_TX_STAT_AMPDU) {
1028 tx_rate = le32_to_cpu(table->rs_table[0].rate_n_flags);
1029 rs_get_tbl_info_from_mcs(tx_rate, priv->band, &tbl_type,
1031 rs_collect_tx_data(curr_tbl, rs_index,
1032 info->status.ampdu_len,
1033 info->status.ampdu_ack_len);
1035 /* Update success/fail counts if not searching for new mode */
1036 if (lq_sta->stay_in_tbl) {
1037 lq_sta->total_success += info->status.ampdu_ack_len;
1038 lq_sta->total_failed += (info->status.ampdu_len -
1039 info->status.ampdu_ack_len);
1043 * For legacy, update frame history with for each Tx retry.
1045 retries = info->status.rates[0].count - 1;
1046 /* HW doesn't send more than 15 retries */
1047 retries = min(retries, 15);
1049 /* The last transmission may have been successful */
1050 legacy_success = !!(info->flags & IEEE80211_TX_STAT_ACK);
1051 /* Collect data for each rate used during failed TX attempts */
1052 for (i = 0; i <= retries; ++i) {
1053 tx_rate = le32_to_cpu(table->rs_table[i].rate_n_flags);
1054 rs_get_tbl_info_from_mcs(tx_rate, priv->band,
1055 &tbl_type, &rs_index);
1057 * Only collect stats if retried rate is in the same RS
1058 * table as active/search.
1060 if (table_type_matches(&tbl_type, curr_tbl))
1062 else if (table_type_matches(&tbl_type, other_tbl))
1063 tmp_tbl = other_tbl;
1066 rs_collect_tx_data(tmp_tbl, rs_index, 1,
1067 i < retries ? 0 : legacy_success);
1070 /* Update success/fail counts if not searching for new mode */
1071 if (lq_sta->stay_in_tbl) {
1072 lq_sta->total_success += legacy_success;
1073 lq_sta->total_failed += retries + (1 - legacy_success);
1076 /* The last TX rate is cached in lq_sta; it's set in if/else above */
1077 lq_sta->last_rate_n_flags = tx_rate;
1079 /* See if there's a better rate or modulation mode to try. */
1080 if (sta && sta->supp_rates[sband->band])
1081 rs_rate_scale_perform(priv, skb, sta, lq_sta);
1083 #if defined(CONFIG_MAC80211_DEBUGFS) && defined(CONFIG_IWLWIFI_DEVICE_TESTMODE)
1084 if ((priv->tm_fixed_rate) &&
1085 (priv->tm_fixed_rate != lq_sta->dbg_fixed_rate))
1086 rs_program_fix_rate(priv, lq_sta);
1088 if (cfg(priv)->bt_params && cfg(priv)->bt_params->advanced_bt_coexist)
1089 rs_bt_update_lq(priv, ctx, lq_sta);
1093 * Begin a period of staying with a selected modulation mode.
1094 * Set "stay_in_tbl" flag to prevent any mode switches.
1095 * Set frame tx success limits according to legacy vs. high-throughput,
1096 * and reset overall (spanning all rates) tx success history statistics.
1097 * These control how long we stay using same modulation mode before
1098 * searching for a new mode.
1100 static void rs_set_stay_in_table(struct iwl_priv *priv, u8 is_legacy,
1101 struct iwl_lq_sta *lq_sta)
1103 IWL_DEBUG_RATE(priv, "we are staying in the same table\n");
1104 lq_sta->stay_in_tbl = 1; /* only place this gets set */
1106 lq_sta->table_count_limit = IWL_LEGACY_TABLE_COUNT;
1107 lq_sta->max_failure_limit = IWL_LEGACY_FAILURE_LIMIT;
1108 lq_sta->max_success_limit = IWL_LEGACY_SUCCESS_LIMIT;
1110 lq_sta->table_count_limit = IWL_NONE_LEGACY_TABLE_COUNT;
1111 lq_sta->max_failure_limit = IWL_NONE_LEGACY_FAILURE_LIMIT;
1112 lq_sta->max_success_limit = IWL_NONE_LEGACY_SUCCESS_LIMIT;
1114 lq_sta->table_count = 0;
1115 lq_sta->total_failed = 0;
1116 lq_sta->total_success = 0;
1117 lq_sta->flush_timer = jiffies;
1118 lq_sta->action_counter = 0;
1122 * Find correct throughput table for given mode of modulation
1124 static void rs_set_expected_tpt_table(struct iwl_lq_sta *lq_sta,
1125 struct iwl_scale_tbl_info *tbl)
1127 /* Used to choose among HT tables */
1128 s32 (*ht_tbl_pointer)[IWL_RATE_COUNT];
1130 /* Check for invalid LQ type */
1131 if (WARN_ON_ONCE(!is_legacy(tbl->lq_type) && !is_Ht(tbl->lq_type))) {
1132 tbl->expected_tpt = expected_tpt_legacy;
1136 /* Legacy rates have only one table */
1137 if (is_legacy(tbl->lq_type)) {
1138 tbl->expected_tpt = expected_tpt_legacy;
1142 /* Choose among many HT tables depending on number of streams
1143 * (SISO/MIMO2/MIMO3), channel width (20/40), SGI, and aggregation
1145 if (is_siso(tbl->lq_type) && (!tbl->is_ht40 || lq_sta->is_dup))
1146 ht_tbl_pointer = expected_tpt_siso20MHz;
1147 else if (is_siso(tbl->lq_type))
1148 ht_tbl_pointer = expected_tpt_siso40MHz;
1149 else if (is_mimo2(tbl->lq_type) && (!tbl->is_ht40 || lq_sta->is_dup))
1150 ht_tbl_pointer = expected_tpt_mimo2_20MHz;
1151 else if (is_mimo2(tbl->lq_type))
1152 ht_tbl_pointer = expected_tpt_mimo2_40MHz;
1153 else if (is_mimo3(tbl->lq_type) && (!tbl->is_ht40 || lq_sta->is_dup))
1154 ht_tbl_pointer = expected_tpt_mimo3_20MHz;
1155 else /* if (is_mimo3(tbl->lq_type)) <-- must be true */
1156 ht_tbl_pointer = expected_tpt_mimo3_40MHz;
1158 if (!tbl->is_SGI && !lq_sta->is_agg) /* Normal */
1159 tbl->expected_tpt = ht_tbl_pointer[0];
1160 else if (tbl->is_SGI && !lq_sta->is_agg) /* SGI */
1161 tbl->expected_tpt = ht_tbl_pointer[1];
1162 else if (!tbl->is_SGI && lq_sta->is_agg) /* AGG */
1163 tbl->expected_tpt = ht_tbl_pointer[2];
1165 tbl->expected_tpt = ht_tbl_pointer[3];
1169 * Find starting rate for new "search" high-throughput mode of modulation.
1170 * Goal is to find lowest expected rate (under perfect conditions) that is
1171 * above the current measured throughput of "active" mode, to give new mode
1172 * a fair chance to prove itself without too many challenges.
1174 * This gets called when transitioning to more aggressive modulation
1175 * (i.e. legacy to SISO or MIMO, or SISO to MIMO), as well as less aggressive
1176 * (i.e. MIMO to SISO). When moving to MIMO, bit rate will typically need
1177 * to decrease to match "active" throughput. When moving from MIMO to SISO,
1178 * bit rate will typically need to increase, but not if performance was bad.
1180 static s32 rs_get_best_rate(struct iwl_priv *priv,
1181 struct iwl_lq_sta *lq_sta,
1182 struct iwl_scale_tbl_info *tbl, /* "search" */
1183 u16 rate_mask, s8 index)
1185 /* "active" values */
1186 struct iwl_scale_tbl_info *active_tbl =
1187 &(lq_sta->lq_info[lq_sta->active_tbl]);
1188 s32 active_sr = active_tbl->win[index].success_ratio;
1189 s32 active_tpt = active_tbl->expected_tpt[index];
1191 /* expected "search" throughput */
1192 s32 *tpt_tbl = tbl->expected_tpt;
1194 s32 new_rate, high, low, start_hi;
1198 new_rate = high = low = start_hi = IWL_RATE_INVALID;
1201 high_low = rs_get_adjacent_rate(priv, rate, rate_mask,
1204 low = high_low & 0xff;
1205 high = (high_low >> 8) & 0xff;
1208 * Lower the "search" bit rate, to give new "search" mode
1209 * approximately the same throughput as "active" if:
1211 * 1) "Active" mode has been working modestly well (but not
1212 * great), and expected "search" throughput (under perfect
1213 * conditions) at candidate rate is above the actual
1214 * measured "active" throughput (but less than expected
1215 * "active" throughput under perfect conditions).
1217 * 2) "Active" mode has been working perfectly or very well
1218 * and expected "search" throughput (under perfect
1219 * conditions) at candidate rate is above expected
1220 * "active" throughput (under perfect conditions).
1222 if ((((100 * tpt_tbl[rate]) > lq_sta->last_tpt) &&
1223 ((active_sr > IWL_RATE_DECREASE_TH) &&
1224 (active_sr <= IWL_RATE_HIGH_TH) &&
1225 (tpt_tbl[rate] <= active_tpt))) ||
1226 ((active_sr >= IWL_RATE_SCALE_SWITCH) &&
1227 (tpt_tbl[rate] > active_tpt))) {
1229 /* (2nd or later pass)
1230 * If we've already tried to raise the rate, and are
1231 * now trying to lower it, use the higher rate. */
1232 if (start_hi != IWL_RATE_INVALID) {
1233 new_rate = start_hi;
1239 /* Loop again with lower rate */
1240 if (low != IWL_RATE_INVALID)
1243 /* Lower rate not available, use the original */
1247 /* Else try to raise the "search" rate to match "active" */
1249 /* (2nd or later pass)
1250 * If we've already tried to lower the rate, and are
1251 * now trying to raise it, use the lower rate. */
1252 if (new_rate != IWL_RATE_INVALID)
1255 /* Loop again with higher rate */
1256 else if (high != IWL_RATE_INVALID) {
1260 /* Higher rate not available, use the original */
1272 * Set up search table for MIMO2
1274 static int rs_switch_to_mimo2(struct iwl_priv *priv,
1275 struct iwl_lq_sta *lq_sta,
1276 struct ieee80211_conf *conf,
1277 struct ieee80211_sta *sta,
1278 struct iwl_scale_tbl_info *tbl, int index)
1282 s8 is_green = lq_sta->is_green;
1283 struct iwl_station_priv *sta_priv = (void *)sta->drv_priv;
1284 struct iwl_rxon_context *ctx = sta_priv->ctx;
1286 if (!conf_is_ht(conf) || !sta->ht_cap.ht_supported)
1289 if (((sta->ht_cap.cap & IEEE80211_HT_CAP_SM_PS) >> 2)
1290 == WLAN_HT_CAP_SM_PS_STATIC)
1293 /* Need both Tx chains/antennas to support MIMO */
1294 if (hw_params(priv).tx_chains_num < 2)
1297 IWL_DEBUG_RATE(priv, "LQ: try to switch to MIMO2\n");
1299 tbl->lq_type = LQ_MIMO2;
1300 tbl->is_dup = lq_sta->is_dup;
1302 tbl->max_search = IWL_MAX_SEARCH;
1303 rate_mask = lq_sta->active_mimo2_rate;
1305 if (iwl_is_ht40_tx_allowed(priv, ctx, &sta->ht_cap))
1310 rs_set_expected_tpt_table(lq_sta, tbl);
1312 rate = rs_get_best_rate(priv, lq_sta, tbl, rate_mask, index);
1314 IWL_DEBUG_RATE(priv, "LQ: MIMO2 best rate %d mask %X\n", rate, rate_mask);
1315 if ((rate == IWL_RATE_INVALID) || !((1 << rate) & rate_mask)) {
1316 IWL_DEBUG_RATE(priv, "Can't switch with index %d rate mask %x\n",
1320 tbl->current_rate = rate_n_flags_from_tbl(priv, tbl, rate, is_green);
1322 IWL_DEBUG_RATE(priv, "LQ: Switch to new mcs %X index is green %X\n",
1323 tbl->current_rate, is_green);
1328 * Set up search table for MIMO3
1330 static int rs_switch_to_mimo3(struct iwl_priv *priv,
1331 struct iwl_lq_sta *lq_sta,
1332 struct ieee80211_conf *conf,
1333 struct ieee80211_sta *sta,
1334 struct iwl_scale_tbl_info *tbl, int index)
1338 s8 is_green = lq_sta->is_green;
1339 struct iwl_station_priv *sta_priv = (void *)sta->drv_priv;
1340 struct iwl_rxon_context *ctx = sta_priv->ctx;
1342 if (!conf_is_ht(conf) || !sta->ht_cap.ht_supported)
1345 if (((sta->ht_cap.cap & IEEE80211_HT_CAP_SM_PS) >> 2)
1346 == WLAN_HT_CAP_SM_PS_STATIC)
1349 /* Need both Tx chains/antennas to support MIMO */
1350 if (hw_params(priv).tx_chains_num < 3)
1353 IWL_DEBUG_RATE(priv, "LQ: try to switch to MIMO3\n");
1355 tbl->lq_type = LQ_MIMO3;
1356 tbl->is_dup = lq_sta->is_dup;
1358 tbl->max_search = IWL_MAX_11N_MIMO3_SEARCH;
1359 rate_mask = lq_sta->active_mimo3_rate;
1361 if (iwl_is_ht40_tx_allowed(priv, ctx, &sta->ht_cap))
1366 rs_set_expected_tpt_table(lq_sta, tbl);
1368 rate = rs_get_best_rate(priv, lq_sta, tbl, rate_mask, index);
1370 IWL_DEBUG_RATE(priv, "LQ: MIMO3 best rate %d mask %X\n",
1372 if ((rate == IWL_RATE_INVALID) || !((1 << rate) & rate_mask)) {
1373 IWL_DEBUG_RATE(priv, "Can't switch with index %d rate mask %x\n",
1377 tbl->current_rate = rate_n_flags_from_tbl(priv, tbl, rate, is_green);
1379 IWL_DEBUG_RATE(priv, "LQ: Switch to new mcs %X index is green %X\n",
1380 tbl->current_rate, is_green);
1385 * Set up search table for SISO
1387 static int rs_switch_to_siso(struct iwl_priv *priv,
1388 struct iwl_lq_sta *lq_sta,
1389 struct ieee80211_conf *conf,
1390 struct ieee80211_sta *sta,
1391 struct iwl_scale_tbl_info *tbl, int index)
1394 u8 is_green = lq_sta->is_green;
1396 struct iwl_station_priv *sta_priv = (void *)sta->drv_priv;
1397 struct iwl_rxon_context *ctx = sta_priv->ctx;
1399 if (!conf_is_ht(conf) || !sta->ht_cap.ht_supported)
1402 IWL_DEBUG_RATE(priv, "LQ: try to switch to SISO\n");
1404 tbl->is_dup = lq_sta->is_dup;
1405 tbl->lq_type = LQ_SISO;
1407 tbl->max_search = IWL_MAX_SEARCH;
1408 rate_mask = lq_sta->active_siso_rate;
1410 if (iwl_is_ht40_tx_allowed(priv, ctx, &sta->ht_cap))
1416 tbl->is_SGI = 0; /*11n spec: no SGI in SISO+Greenfield*/
1418 rs_set_expected_tpt_table(lq_sta, tbl);
1419 rate = rs_get_best_rate(priv, lq_sta, tbl, rate_mask, index);
1421 IWL_DEBUG_RATE(priv, "LQ: get best rate %d mask %X\n", rate, rate_mask);
1422 if ((rate == IWL_RATE_INVALID) || !((1 << rate) & rate_mask)) {
1423 IWL_DEBUG_RATE(priv, "can not switch with index %d rate mask %x\n",
1427 tbl->current_rate = rate_n_flags_from_tbl(priv, tbl, rate, is_green);
1428 IWL_DEBUG_RATE(priv, "LQ: Switch to new mcs %X index is green %X\n",
1429 tbl->current_rate, is_green);
1434 * Try to switch to new modulation mode from legacy
1436 static int rs_move_legacy_other(struct iwl_priv *priv,
1437 struct iwl_lq_sta *lq_sta,
1438 struct ieee80211_conf *conf,
1439 struct ieee80211_sta *sta,
1442 struct iwl_scale_tbl_info *tbl = &(lq_sta->lq_info[lq_sta->active_tbl]);
1443 struct iwl_scale_tbl_info *search_tbl =
1444 &(lq_sta->lq_info[(1 - lq_sta->active_tbl)]);
1445 struct iwl_rate_scale_data *window = &(tbl->win[index]);
1446 u32 sz = (sizeof(struct iwl_scale_tbl_info) -
1447 (sizeof(struct iwl_rate_scale_data) * IWL_RATE_COUNT));
1449 u8 valid_tx_ant = hw_params(priv).valid_tx_ant;
1450 u8 tx_chains_num = hw_params(priv).tx_chains_num;
1452 u8 update_search_tbl_counter = 0;
1454 switch (priv->bt_traffic_load) {
1455 case IWL_BT_COEX_TRAFFIC_LOAD_NONE:
1458 case IWL_BT_COEX_TRAFFIC_LOAD_LOW:
1459 /* avoid antenna B unless MIMO */
1460 if (tbl->action == IWL_LEGACY_SWITCH_ANTENNA2)
1461 tbl->action = IWL_LEGACY_SWITCH_SISO;
1463 case IWL_BT_COEX_TRAFFIC_LOAD_HIGH:
1464 case IWL_BT_COEX_TRAFFIC_LOAD_CONTINUOUS:
1465 /* avoid antenna B and MIMO */
1467 first_antenna(hw_params(priv).valid_tx_ant);
1468 if (tbl->action >= IWL_LEGACY_SWITCH_ANTENNA2 &&
1469 tbl->action != IWL_LEGACY_SWITCH_SISO)
1470 tbl->action = IWL_LEGACY_SWITCH_SISO;
1473 IWL_ERR(priv, "Invalid BT load %d", priv->bt_traffic_load);
1477 if (!iwl_ht_enabled(priv))
1478 /* stay in Legacy */
1479 tbl->action = IWL_LEGACY_SWITCH_ANTENNA1;
1480 else if (iwl_tx_ant_restriction(priv) == IWL_ANT_OK_SINGLE &&
1481 tbl->action > IWL_LEGACY_SWITCH_SISO)
1482 tbl->action = IWL_LEGACY_SWITCH_SISO;
1484 /* configure as 1x1 if bt full concurrency */
1485 if (priv->bt_full_concurrent) {
1486 if (!iwl_ht_enabled(priv))
1487 tbl->action = IWL_LEGACY_SWITCH_ANTENNA1;
1488 else if (tbl->action >= IWL_LEGACY_SWITCH_ANTENNA2)
1489 tbl->action = IWL_LEGACY_SWITCH_SISO;
1491 first_antenna(hw_params(priv).valid_tx_ant);
1494 start_action = tbl->action;
1496 lq_sta->action_counter++;
1497 switch (tbl->action) {
1498 case IWL_LEGACY_SWITCH_ANTENNA1:
1499 case IWL_LEGACY_SWITCH_ANTENNA2:
1500 IWL_DEBUG_RATE(priv, "LQ: Legacy toggle Antenna\n");
1502 if ((tbl->action == IWL_LEGACY_SWITCH_ANTENNA1 &&
1503 tx_chains_num <= 1) ||
1504 (tbl->action == IWL_LEGACY_SWITCH_ANTENNA2 &&
1505 tx_chains_num <= 2))
1508 /* Don't change antenna if success has been great */
1509 if (window->success_ratio >= IWL_RS_GOOD_RATIO &&
1510 !priv->bt_full_concurrent &&
1511 priv->bt_traffic_load ==
1512 IWL_BT_COEX_TRAFFIC_LOAD_NONE)
1515 /* Set up search table to try other antenna */
1516 memcpy(search_tbl, tbl, sz);
1518 if (rs_toggle_antenna(valid_tx_ant,
1519 &search_tbl->current_rate, search_tbl)) {
1520 update_search_tbl_counter = 1;
1521 rs_set_expected_tpt_table(lq_sta, search_tbl);
1525 case IWL_LEGACY_SWITCH_SISO:
1526 IWL_DEBUG_RATE(priv, "LQ: Legacy switch to SISO\n");
1528 /* Set up search table to try SISO */
1529 memcpy(search_tbl, tbl, sz);
1530 search_tbl->is_SGI = 0;
1531 ret = rs_switch_to_siso(priv, lq_sta, conf, sta,
1534 lq_sta->action_counter = 0;
1539 case IWL_LEGACY_SWITCH_MIMO2_AB:
1540 case IWL_LEGACY_SWITCH_MIMO2_AC:
1541 case IWL_LEGACY_SWITCH_MIMO2_BC:
1542 IWL_DEBUG_RATE(priv, "LQ: Legacy switch to MIMO2\n");
1544 /* Set up search table to try MIMO */
1545 memcpy(search_tbl, tbl, sz);
1546 search_tbl->is_SGI = 0;
1548 if (tbl->action == IWL_LEGACY_SWITCH_MIMO2_AB)
1549 search_tbl->ant_type = ANT_AB;
1550 else if (tbl->action == IWL_LEGACY_SWITCH_MIMO2_AC)
1551 search_tbl->ant_type = ANT_AC;
1553 search_tbl->ant_type = ANT_BC;
1555 if (!rs_is_valid_ant(valid_tx_ant, search_tbl->ant_type))
1558 ret = rs_switch_to_mimo2(priv, lq_sta, conf, sta,
1561 lq_sta->action_counter = 0;
1566 case IWL_LEGACY_SWITCH_MIMO3_ABC:
1567 IWL_DEBUG_RATE(priv, "LQ: Legacy switch to MIMO3\n");
1569 /* Set up search table to try MIMO3 */
1570 memcpy(search_tbl, tbl, sz);
1571 search_tbl->is_SGI = 0;
1573 search_tbl->ant_type = ANT_ABC;
1575 if (!rs_is_valid_ant(valid_tx_ant, search_tbl->ant_type))
1578 ret = rs_switch_to_mimo3(priv, lq_sta, conf, sta,
1581 lq_sta->action_counter = 0;
1587 if (tbl->action > IWL_LEGACY_SWITCH_MIMO3_ABC)
1588 tbl->action = IWL_LEGACY_SWITCH_ANTENNA1;
1590 if (tbl->action == start_action)
1594 search_tbl->lq_type = LQ_NONE;
1598 lq_sta->search_better_tbl = 1;
1600 if (tbl->action > IWL_LEGACY_SWITCH_MIMO3_ABC)
1601 tbl->action = IWL_LEGACY_SWITCH_ANTENNA1;
1602 if (update_search_tbl_counter)
1603 search_tbl->action = tbl->action;
1609 * Try to switch to new modulation mode from SISO
1611 static int rs_move_siso_to_other(struct iwl_priv *priv,
1612 struct iwl_lq_sta *lq_sta,
1613 struct ieee80211_conf *conf,
1614 struct ieee80211_sta *sta, int index)
1616 u8 is_green = lq_sta->is_green;
1617 struct iwl_scale_tbl_info *tbl = &(lq_sta->lq_info[lq_sta->active_tbl]);
1618 struct iwl_scale_tbl_info *search_tbl =
1619 &(lq_sta->lq_info[(1 - lq_sta->active_tbl)]);
1620 struct iwl_rate_scale_data *window = &(tbl->win[index]);
1621 struct ieee80211_sta_ht_cap *ht_cap = &sta->ht_cap;
1622 u32 sz = (sizeof(struct iwl_scale_tbl_info) -
1623 (sizeof(struct iwl_rate_scale_data) * IWL_RATE_COUNT));
1625 u8 valid_tx_ant = hw_params(priv).valid_tx_ant;
1626 u8 tx_chains_num = hw_params(priv).tx_chains_num;
1627 u8 update_search_tbl_counter = 0;
1630 switch (priv->bt_traffic_load) {
1631 case IWL_BT_COEX_TRAFFIC_LOAD_NONE:
1634 case IWL_BT_COEX_TRAFFIC_LOAD_LOW:
1635 /* avoid antenna B unless MIMO */
1636 if (tbl->action == IWL_SISO_SWITCH_ANTENNA2)
1637 tbl->action = IWL_SISO_SWITCH_MIMO2_AB;
1639 case IWL_BT_COEX_TRAFFIC_LOAD_HIGH:
1640 case IWL_BT_COEX_TRAFFIC_LOAD_CONTINUOUS:
1641 /* avoid antenna B and MIMO */
1643 first_antenna(hw_params(priv).valid_tx_ant);
1644 if (tbl->action != IWL_SISO_SWITCH_ANTENNA1)
1645 tbl->action = IWL_SISO_SWITCH_ANTENNA1;
1648 IWL_ERR(priv, "Invalid BT load %d", priv->bt_traffic_load);
1652 if (iwl_tx_ant_restriction(priv) == IWL_ANT_OK_SINGLE &&
1653 tbl->action > IWL_SISO_SWITCH_ANTENNA2) {
1655 tbl->action = IWL_SISO_SWITCH_ANTENNA1;
1658 /* configure as 1x1 if bt full concurrency */
1659 if (priv->bt_full_concurrent) {
1661 first_antenna(hw_params(priv).valid_tx_ant);
1662 if (tbl->action >= IWL_LEGACY_SWITCH_ANTENNA2)
1663 tbl->action = IWL_SISO_SWITCH_ANTENNA1;
1666 start_action = tbl->action;
1668 lq_sta->action_counter++;
1669 switch (tbl->action) {
1670 case IWL_SISO_SWITCH_ANTENNA1:
1671 case IWL_SISO_SWITCH_ANTENNA2:
1672 IWL_DEBUG_RATE(priv, "LQ: SISO toggle Antenna\n");
1673 if ((tbl->action == IWL_SISO_SWITCH_ANTENNA1 &&
1674 tx_chains_num <= 1) ||
1675 (tbl->action == IWL_SISO_SWITCH_ANTENNA2 &&
1676 tx_chains_num <= 2))
1679 if (window->success_ratio >= IWL_RS_GOOD_RATIO &&
1680 !priv->bt_full_concurrent &&
1681 priv->bt_traffic_load ==
1682 IWL_BT_COEX_TRAFFIC_LOAD_NONE)
1685 memcpy(search_tbl, tbl, sz);
1686 if (rs_toggle_antenna(valid_tx_ant,
1687 &search_tbl->current_rate, search_tbl)) {
1688 update_search_tbl_counter = 1;
1692 case IWL_SISO_SWITCH_MIMO2_AB:
1693 case IWL_SISO_SWITCH_MIMO2_AC:
1694 case IWL_SISO_SWITCH_MIMO2_BC:
1695 IWL_DEBUG_RATE(priv, "LQ: SISO switch to MIMO2\n");
1696 memcpy(search_tbl, tbl, sz);
1697 search_tbl->is_SGI = 0;
1699 if (tbl->action == IWL_SISO_SWITCH_MIMO2_AB)
1700 search_tbl->ant_type = ANT_AB;
1701 else if (tbl->action == IWL_SISO_SWITCH_MIMO2_AC)
1702 search_tbl->ant_type = ANT_AC;
1704 search_tbl->ant_type = ANT_BC;
1706 if (!rs_is_valid_ant(valid_tx_ant, search_tbl->ant_type))
1709 ret = rs_switch_to_mimo2(priv, lq_sta, conf, sta,
1714 case IWL_SISO_SWITCH_GI:
1715 if (!tbl->is_ht40 && !(ht_cap->cap &
1716 IEEE80211_HT_CAP_SGI_20))
1718 if (tbl->is_ht40 && !(ht_cap->cap &
1719 IEEE80211_HT_CAP_SGI_40))
1722 IWL_DEBUG_RATE(priv, "LQ: SISO toggle SGI/NGI\n");
1724 memcpy(search_tbl, tbl, sz);
1730 "SGI was set in GF+SISO\n");
1732 search_tbl->is_SGI = !tbl->is_SGI;
1733 rs_set_expected_tpt_table(lq_sta, search_tbl);
1735 s32 tpt = lq_sta->last_tpt / 100;
1736 if (tpt >= search_tbl->expected_tpt[index])
1739 search_tbl->current_rate =
1740 rate_n_flags_from_tbl(priv, search_tbl,
1742 update_search_tbl_counter = 1;
1744 case IWL_SISO_SWITCH_MIMO3_ABC:
1745 IWL_DEBUG_RATE(priv, "LQ: SISO switch to MIMO3\n");
1746 memcpy(search_tbl, tbl, sz);
1747 search_tbl->is_SGI = 0;
1748 search_tbl->ant_type = ANT_ABC;
1750 if (!rs_is_valid_ant(valid_tx_ant, search_tbl->ant_type))
1753 ret = rs_switch_to_mimo3(priv, lq_sta, conf, sta,
1760 if (tbl->action > IWL_LEGACY_SWITCH_MIMO3_ABC)
1761 tbl->action = IWL_SISO_SWITCH_ANTENNA1;
1763 if (tbl->action == start_action)
1766 search_tbl->lq_type = LQ_NONE;
1770 lq_sta->search_better_tbl = 1;
1772 if (tbl->action > IWL_SISO_SWITCH_MIMO3_ABC)
1773 tbl->action = IWL_SISO_SWITCH_ANTENNA1;
1774 if (update_search_tbl_counter)
1775 search_tbl->action = tbl->action;
1781 * Try to switch to new modulation mode from MIMO2
1783 static int rs_move_mimo2_to_other(struct iwl_priv *priv,
1784 struct iwl_lq_sta *lq_sta,
1785 struct ieee80211_conf *conf,
1786 struct ieee80211_sta *sta, int index)
1788 s8 is_green = lq_sta->is_green;
1789 struct iwl_scale_tbl_info *tbl = &(lq_sta->lq_info[lq_sta->active_tbl]);
1790 struct iwl_scale_tbl_info *search_tbl =
1791 &(lq_sta->lq_info[(1 - lq_sta->active_tbl)]);
1792 struct iwl_rate_scale_data *window = &(tbl->win[index]);
1793 struct ieee80211_sta_ht_cap *ht_cap = &sta->ht_cap;
1794 u32 sz = (sizeof(struct iwl_scale_tbl_info) -
1795 (sizeof(struct iwl_rate_scale_data) * IWL_RATE_COUNT));
1797 u8 valid_tx_ant = hw_params(priv).valid_tx_ant;
1798 u8 tx_chains_num = hw_params(priv).tx_chains_num;
1799 u8 update_search_tbl_counter = 0;
1802 switch (priv->bt_traffic_load) {
1803 case IWL_BT_COEX_TRAFFIC_LOAD_NONE:
1806 case IWL_BT_COEX_TRAFFIC_LOAD_HIGH:
1807 case IWL_BT_COEX_TRAFFIC_LOAD_CONTINUOUS:
1808 /* avoid antenna B and MIMO */
1809 if (tbl->action != IWL_MIMO2_SWITCH_SISO_A)
1810 tbl->action = IWL_MIMO2_SWITCH_SISO_A;
1812 case IWL_BT_COEX_TRAFFIC_LOAD_LOW:
1813 /* avoid antenna B unless MIMO */
1814 if (tbl->action == IWL_MIMO2_SWITCH_SISO_B ||
1815 tbl->action == IWL_MIMO2_SWITCH_SISO_C)
1816 tbl->action = IWL_MIMO2_SWITCH_SISO_A;
1819 IWL_ERR(priv, "Invalid BT load %d", priv->bt_traffic_load);
1823 if ((iwl_tx_ant_restriction(priv) == IWL_ANT_OK_SINGLE) &&
1824 (tbl->action < IWL_MIMO2_SWITCH_SISO_A ||
1825 tbl->action > IWL_MIMO2_SWITCH_SISO_C)) {
1826 /* switch in SISO */
1827 tbl->action = IWL_MIMO2_SWITCH_SISO_A;
1830 /* configure as 1x1 if bt full concurrency */
1831 if (priv->bt_full_concurrent &&
1832 (tbl->action < IWL_MIMO2_SWITCH_SISO_A ||
1833 tbl->action > IWL_MIMO2_SWITCH_SISO_C))
1834 tbl->action = IWL_MIMO2_SWITCH_SISO_A;
1836 start_action = tbl->action;
1838 lq_sta->action_counter++;
1839 switch (tbl->action) {
1840 case IWL_MIMO2_SWITCH_ANTENNA1:
1841 case IWL_MIMO2_SWITCH_ANTENNA2:
1842 IWL_DEBUG_RATE(priv, "LQ: MIMO2 toggle Antennas\n");
1844 if (tx_chains_num <= 2)
1847 if (window->success_ratio >= IWL_RS_GOOD_RATIO)
1850 memcpy(search_tbl, tbl, sz);
1851 if (rs_toggle_antenna(valid_tx_ant,
1852 &search_tbl->current_rate, search_tbl)) {
1853 update_search_tbl_counter = 1;
1857 case IWL_MIMO2_SWITCH_SISO_A:
1858 case IWL_MIMO2_SWITCH_SISO_B:
1859 case IWL_MIMO2_SWITCH_SISO_C:
1860 IWL_DEBUG_RATE(priv, "LQ: MIMO2 switch to SISO\n");
1862 /* Set up new search table for SISO */
1863 memcpy(search_tbl, tbl, sz);
1865 if (tbl->action == IWL_MIMO2_SWITCH_SISO_A)
1866 search_tbl->ant_type = ANT_A;
1867 else if (tbl->action == IWL_MIMO2_SWITCH_SISO_B)
1868 search_tbl->ant_type = ANT_B;
1870 search_tbl->ant_type = ANT_C;
1872 if (!rs_is_valid_ant(valid_tx_ant, search_tbl->ant_type))
1875 ret = rs_switch_to_siso(priv, lq_sta, conf, sta,
1882 case IWL_MIMO2_SWITCH_GI:
1883 if (!tbl->is_ht40 && !(ht_cap->cap &
1884 IEEE80211_HT_CAP_SGI_20))
1886 if (tbl->is_ht40 && !(ht_cap->cap &
1887 IEEE80211_HT_CAP_SGI_40))
1890 IWL_DEBUG_RATE(priv, "LQ: MIMO2 toggle SGI/NGI\n");
1892 /* Set up new search table for MIMO2 */
1893 memcpy(search_tbl, tbl, sz);
1894 search_tbl->is_SGI = !tbl->is_SGI;
1895 rs_set_expected_tpt_table(lq_sta, search_tbl);
1897 * If active table already uses the fastest possible
1898 * modulation (dual stream with short guard interval),
1899 * and it's working well, there's no need to look
1900 * for a better type of modulation!
1903 s32 tpt = lq_sta->last_tpt / 100;
1904 if (tpt >= search_tbl->expected_tpt[index])
1907 search_tbl->current_rate =
1908 rate_n_flags_from_tbl(priv, search_tbl,
1910 update_search_tbl_counter = 1;
1913 case IWL_MIMO2_SWITCH_MIMO3_ABC:
1914 IWL_DEBUG_RATE(priv, "LQ: MIMO2 switch to MIMO3\n");
1915 memcpy(search_tbl, tbl, sz);
1916 search_tbl->is_SGI = 0;
1917 search_tbl->ant_type = ANT_ABC;
1919 if (!rs_is_valid_ant(valid_tx_ant, search_tbl->ant_type))
1922 ret = rs_switch_to_mimo3(priv, lq_sta, conf, sta,
1930 if (tbl->action > IWL_MIMO2_SWITCH_MIMO3_ABC)
1931 tbl->action = IWL_MIMO2_SWITCH_ANTENNA1;
1933 if (tbl->action == start_action)
1936 search_tbl->lq_type = LQ_NONE;
1939 lq_sta->search_better_tbl = 1;
1941 if (tbl->action > IWL_MIMO2_SWITCH_MIMO3_ABC)
1942 tbl->action = IWL_MIMO2_SWITCH_ANTENNA1;
1943 if (update_search_tbl_counter)
1944 search_tbl->action = tbl->action;
1951 * Try to switch to new modulation mode from MIMO3
1953 static int rs_move_mimo3_to_other(struct iwl_priv *priv,
1954 struct iwl_lq_sta *lq_sta,
1955 struct ieee80211_conf *conf,
1956 struct ieee80211_sta *sta, int index)
1958 s8 is_green = lq_sta->is_green;
1959 struct iwl_scale_tbl_info *tbl = &(lq_sta->lq_info[lq_sta->active_tbl]);
1960 struct iwl_scale_tbl_info *search_tbl =
1961 &(lq_sta->lq_info[(1 - lq_sta->active_tbl)]);
1962 struct iwl_rate_scale_data *window = &(tbl->win[index]);
1963 struct ieee80211_sta_ht_cap *ht_cap = &sta->ht_cap;
1964 u32 sz = (sizeof(struct iwl_scale_tbl_info) -
1965 (sizeof(struct iwl_rate_scale_data) * IWL_RATE_COUNT));
1967 u8 valid_tx_ant = hw_params(priv).valid_tx_ant;
1968 u8 tx_chains_num = hw_params(priv).tx_chains_num;
1970 u8 update_search_tbl_counter = 0;
1972 switch (priv->bt_traffic_load) {
1973 case IWL_BT_COEX_TRAFFIC_LOAD_NONE:
1976 case IWL_BT_COEX_TRAFFIC_LOAD_HIGH:
1977 case IWL_BT_COEX_TRAFFIC_LOAD_CONTINUOUS:
1978 /* avoid antenna B and MIMO */
1979 if (tbl->action != IWL_MIMO3_SWITCH_SISO_A)
1980 tbl->action = IWL_MIMO3_SWITCH_SISO_A;
1982 case IWL_BT_COEX_TRAFFIC_LOAD_LOW:
1983 /* avoid antenna B unless MIMO */
1984 if (tbl->action == IWL_MIMO3_SWITCH_SISO_B ||
1985 tbl->action == IWL_MIMO3_SWITCH_SISO_C)
1986 tbl->action = IWL_MIMO3_SWITCH_SISO_A;
1989 IWL_ERR(priv, "Invalid BT load %d", priv->bt_traffic_load);
1993 if ((iwl_tx_ant_restriction(priv) == IWL_ANT_OK_SINGLE) &&
1994 (tbl->action < IWL_MIMO3_SWITCH_SISO_A ||
1995 tbl->action > IWL_MIMO3_SWITCH_SISO_C)) {
1996 /* switch in SISO */
1997 tbl->action = IWL_MIMO3_SWITCH_SISO_A;
2000 /* configure as 1x1 if bt full concurrency */
2001 if (priv->bt_full_concurrent &&
2002 (tbl->action < IWL_MIMO3_SWITCH_SISO_A ||
2003 tbl->action > IWL_MIMO3_SWITCH_SISO_C))
2004 tbl->action = IWL_MIMO3_SWITCH_SISO_A;
2006 start_action = tbl->action;
2008 lq_sta->action_counter++;
2009 switch (tbl->action) {
2010 case IWL_MIMO3_SWITCH_ANTENNA1:
2011 case IWL_MIMO3_SWITCH_ANTENNA2:
2012 IWL_DEBUG_RATE(priv, "LQ: MIMO3 toggle Antennas\n");
2014 if (tx_chains_num <= 3)
2017 if (window->success_ratio >= IWL_RS_GOOD_RATIO)
2020 memcpy(search_tbl, tbl, sz);
2021 if (rs_toggle_antenna(valid_tx_ant,
2022 &search_tbl->current_rate, search_tbl))
2025 case IWL_MIMO3_SWITCH_SISO_A:
2026 case IWL_MIMO3_SWITCH_SISO_B:
2027 case IWL_MIMO3_SWITCH_SISO_C:
2028 IWL_DEBUG_RATE(priv, "LQ: MIMO3 switch to SISO\n");
2030 /* Set up new search table for SISO */
2031 memcpy(search_tbl, tbl, sz);
2033 if (tbl->action == IWL_MIMO3_SWITCH_SISO_A)
2034 search_tbl->ant_type = ANT_A;
2035 else if (tbl->action == IWL_MIMO3_SWITCH_SISO_B)
2036 search_tbl->ant_type = ANT_B;
2038 search_tbl->ant_type = ANT_C;
2040 if (!rs_is_valid_ant(valid_tx_ant, search_tbl->ant_type))
2043 ret = rs_switch_to_siso(priv, lq_sta, conf, sta,
2050 case IWL_MIMO3_SWITCH_MIMO2_AB:
2051 case IWL_MIMO3_SWITCH_MIMO2_AC:
2052 case IWL_MIMO3_SWITCH_MIMO2_BC:
2053 IWL_DEBUG_RATE(priv, "LQ: MIMO3 switch to MIMO2\n");
2055 memcpy(search_tbl, tbl, sz);
2056 search_tbl->is_SGI = 0;
2057 if (tbl->action == IWL_MIMO3_SWITCH_MIMO2_AB)
2058 search_tbl->ant_type = ANT_AB;
2059 else if (tbl->action == IWL_MIMO3_SWITCH_MIMO2_AC)
2060 search_tbl->ant_type = ANT_AC;
2062 search_tbl->ant_type = ANT_BC;
2064 if (!rs_is_valid_ant(valid_tx_ant, search_tbl->ant_type))
2067 ret = rs_switch_to_mimo2(priv, lq_sta, conf, sta,
2074 case IWL_MIMO3_SWITCH_GI:
2075 if (!tbl->is_ht40 && !(ht_cap->cap &
2076 IEEE80211_HT_CAP_SGI_20))
2078 if (tbl->is_ht40 && !(ht_cap->cap &
2079 IEEE80211_HT_CAP_SGI_40))
2082 IWL_DEBUG_RATE(priv, "LQ: MIMO3 toggle SGI/NGI\n");
2084 /* Set up new search table for MIMO */
2085 memcpy(search_tbl, tbl, sz);
2086 search_tbl->is_SGI = !tbl->is_SGI;
2087 rs_set_expected_tpt_table(lq_sta, search_tbl);
2089 * If active table already uses the fastest possible
2090 * modulation (dual stream with short guard interval),
2091 * and it's working well, there's no need to look
2092 * for a better type of modulation!
2095 s32 tpt = lq_sta->last_tpt / 100;
2096 if (tpt >= search_tbl->expected_tpt[index])
2099 search_tbl->current_rate =
2100 rate_n_flags_from_tbl(priv, search_tbl,
2102 update_search_tbl_counter = 1;
2106 if (tbl->action > IWL_MIMO3_SWITCH_GI)
2107 tbl->action = IWL_MIMO3_SWITCH_ANTENNA1;
2109 if (tbl->action == start_action)
2112 search_tbl->lq_type = LQ_NONE;
2115 lq_sta->search_better_tbl = 1;
2117 if (tbl->action > IWL_MIMO3_SWITCH_GI)
2118 tbl->action = IWL_MIMO3_SWITCH_ANTENNA1;
2119 if (update_search_tbl_counter)
2120 search_tbl->action = tbl->action;
2127 * Check whether we should continue using same modulation mode, or
2128 * begin search for a new mode, based on:
2129 * 1) # tx successes or failures while using this mode
2130 * 2) # times calling this function
2131 * 3) elapsed time in this mode (not used, for now)
2133 static void rs_stay_in_table(struct iwl_lq_sta *lq_sta, bool force_search)
2135 struct iwl_scale_tbl_info *tbl;
2138 int flush_interval_passed = 0;
2139 struct iwl_priv *priv;
2142 active_tbl = lq_sta->active_tbl;
2144 tbl = &(lq_sta->lq_info[active_tbl]);
2146 /* If we've been disallowing search, see if we should now allow it */
2147 if (lq_sta->stay_in_tbl) {
2149 /* Elapsed time using current modulation mode */
2150 if (lq_sta->flush_timer)
2151 flush_interval_passed =
2153 (unsigned long)(lq_sta->flush_timer +
2154 IWL_RATE_SCALE_FLUSH_INTVL));
2157 * Check if we should allow search for new modulation mode.
2158 * If many frames have failed or succeeded, or we've used
2159 * this same modulation for a long time, allow search, and
2160 * reset history stats that keep track of whether we should
2161 * allow a new search. Also (below) reset all bitmaps and
2162 * stats in active history.
2165 (lq_sta->total_failed > lq_sta->max_failure_limit) ||
2166 (lq_sta->total_success > lq_sta->max_success_limit) ||
2167 ((!lq_sta->search_better_tbl) && (lq_sta->flush_timer)
2168 && (flush_interval_passed))) {
2169 IWL_DEBUG_RATE(priv, "LQ: stay is expired %d %d %d\n:",
2170 lq_sta->total_failed,
2171 lq_sta->total_success,
2172 flush_interval_passed);
2174 /* Allow search for new mode */
2175 lq_sta->stay_in_tbl = 0; /* only place reset */
2176 lq_sta->total_failed = 0;
2177 lq_sta->total_success = 0;
2178 lq_sta->flush_timer = 0;
2181 * Else if we've used this modulation mode enough repetitions
2182 * (regardless of elapsed time or success/failure), reset
2183 * history bitmaps and rate-specific stats for all rates in
2187 lq_sta->table_count++;
2188 if (lq_sta->table_count >=
2189 lq_sta->table_count_limit) {
2190 lq_sta->table_count = 0;
2192 IWL_DEBUG_RATE(priv, "LQ: stay in table clear win\n");
2193 for (i = 0; i < IWL_RATE_COUNT; i++)
2194 rs_rate_scale_clear_window(
2199 /* If transitioning to allow "search", reset all history
2200 * bitmaps and stats in active table (this will become the new
2201 * "search" table). */
2202 if (!lq_sta->stay_in_tbl) {
2203 for (i = 0; i < IWL_RATE_COUNT; i++)
2204 rs_rate_scale_clear_window(&(tbl->win[i]));
2210 * setup rate table in uCode
2212 static void rs_update_rate_tbl(struct iwl_priv *priv,
2213 struct iwl_rxon_context *ctx,
2214 struct iwl_lq_sta *lq_sta,
2215 struct iwl_scale_tbl_info *tbl,
2216 int index, u8 is_green)
2220 /* Update uCode's rate table. */
2221 rate = rate_n_flags_from_tbl(priv, tbl, index, is_green);
2222 rs_fill_link_cmd(priv, lq_sta, rate);
2223 iwl_send_lq_cmd(priv, ctx, &lq_sta->lq, CMD_ASYNC, false);
2227 * Do rate scaling and search for new modulation mode.
2229 static void rs_rate_scale_perform(struct iwl_priv *priv,
2230 struct sk_buff *skb,
2231 struct ieee80211_sta *sta,
2232 struct iwl_lq_sta *lq_sta)
2234 struct ieee80211_hw *hw = priv->hw;
2235 struct ieee80211_conf *conf = &hw->conf;
2236 struct ieee80211_tx_info *info = IEEE80211_SKB_CB(skb);
2237 struct ieee80211_hdr *hdr = (struct ieee80211_hdr *)skb->data;
2238 int low = IWL_RATE_INVALID;
2239 int high = IWL_RATE_INVALID;
2242 struct iwl_rate_scale_data *window = NULL;
2243 int current_tpt = IWL_INVALID_VALUE;
2244 int low_tpt = IWL_INVALID_VALUE;
2245 int high_tpt = IWL_INVALID_VALUE;
2247 s8 scale_action = 0;
2250 struct iwl_scale_tbl_info *tbl, *tbl1;
2251 u16 rate_scale_index_msk = 0;
2257 u8 tid = IWL_MAX_TID_COUNT;
2258 struct iwl_tid_data *tid_data;
2259 struct iwl_station_priv *sta_priv = (void *)sta->drv_priv;
2260 struct iwl_rxon_context *ctx = sta_priv->ctx;
2262 IWL_DEBUG_RATE(priv, "rate scale calculate new rate for skb\n");
2264 /* Send management frames and NO_ACK data using lowest rate. */
2265 /* TODO: this could probably be improved.. */
2266 if (!ieee80211_is_data(hdr->frame_control) ||
2267 info->flags & IEEE80211_TX_CTL_NO_ACK)
2270 lq_sta->supp_rates = sta->supp_rates[lq_sta->band];
2272 tid = rs_tl_add_packet(lq_sta, hdr);
2273 if ((tid != IWL_MAX_TID_COUNT) &&
2274 (lq_sta->tx_agg_tid_en & (1 << tid))) {
2275 tid_data = &priv->tid_data[lq_sta->lq.sta_id][tid];
2276 if (tid_data->agg.state == IWL_AGG_OFF)
2284 * Select rate-scale / modulation-mode table to work with in
2285 * the rest of this function: "search" if searching for better
2286 * modulation mode, or "active" if doing rate scaling within a mode.
2288 if (!lq_sta->search_better_tbl)
2289 active_tbl = lq_sta->active_tbl;
2291 active_tbl = 1 - lq_sta->active_tbl;
2293 tbl = &(lq_sta->lq_info[active_tbl]);
2294 if (is_legacy(tbl->lq_type))
2295 lq_sta->is_green = 0;
2297 lq_sta->is_green = rs_use_green(sta);
2298 is_green = lq_sta->is_green;
2300 /* current tx rate */
2301 index = lq_sta->last_txrate_idx;
2303 IWL_DEBUG_RATE(priv, "Rate scale index %d for type %d\n", index,
2306 /* rates available for this association, and for modulation mode */
2307 rate_mask = rs_get_supported_rates(lq_sta, hdr, tbl->lq_type);
2309 IWL_DEBUG_RATE(priv, "mask 0x%04X\n", rate_mask);
2311 /* mask with station rate restriction */
2312 if (is_legacy(tbl->lq_type)) {
2313 if (lq_sta->band == IEEE80211_BAND_5GHZ)
2314 /* supp_rates has no CCK bits in A mode */
2315 rate_scale_index_msk = (u16) (rate_mask &
2316 (lq_sta->supp_rates << IWL_FIRST_OFDM_RATE));
2318 rate_scale_index_msk = (u16) (rate_mask &
2319 lq_sta->supp_rates);
2322 rate_scale_index_msk = rate_mask;
2324 if (!rate_scale_index_msk)
2325 rate_scale_index_msk = rate_mask;
2327 if (!((1 << index) & rate_scale_index_msk)) {
2328 IWL_ERR(priv, "Current Rate is not valid\n");
2329 if (lq_sta->search_better_tbl) {
2330 /* revert to active table if search table is not valid*/
2331 tbl->lq_type = LQ_NONE;
2332 lq_sta->search_better_tbl = 0;
2333 tbl = &(lq_sta->lq_info[lq_sta->active_tbl]);
2334 /* get "active" rate info */
2335 index = iwl_hwrate_to_plcp_idx(tbl->current_rate);
2336 rs_update_rate_tbl(priv, ctx, lq_sta, tbl,
2342 /* Get expected throughput table and history window for current rate */
2343 if (!tbl->expected_tpt) {
2344 IWL_ERR(priv, "tbl->expected_tpt is NULL\n");
2348 /* force user max rate if set by user */
2349 if ((lq_sta->max_rate_idx != -1) &&
2350 (lq_sta->max_rate_idx < index)) {
2351 index = lq_sta->max_rate_idx;
2353 window = &(tbl->win[index]);
2357 window = &(tbl->win[index]);
2360 * If there is not enough history to calculate actual average
2361 * throughput, keep analyzing results of more tx frames, without
2362 * changing rate or mode (bypass most of the rest of this function).
2363 * Set up new rate table in uCode only if old rate is not supported
2364 * in current association (use new rate found above).
2366 fail_count = window->counter - window->success_counter;
2367 if ((fail_count < IWL_RATE_MIN_FAILURE_TH) &&
2368 (window->success_counter < IWL_RATE_MIN_SUCCESS_TH)) {
2369 IWL_DEBUG_RATE(priv, "LQ: still below TH. succ=%d total=%d "
2371 window->success_counter, window->counter, index);
2373 /* Can't calculate this yet; not enough history */
2374 window->average_tpt = IWL_INVALID_VALUE;
2376 /* Should we stay with this modulation mode,
2377 * or search for a new one? */
2378 rs_stay_in_table(lq_sta, false);
2382 /* Else we have enough samples; calculate estimate of
2383 * actual average throughput */
2384 if (window->average_tpt != ((window->success_ratio *
2385 tbl->expected_tpt[index] + 64) / 128)) {
2386 IWL_ERR(priv, "expected_tpt should have been calculated by now\n");
2387 window->average_tpt = ((window->success_ratio *
2388 tbl->expected_tpt[index] + 64) / 128);
2391 /* If we are searching for better modulation mode, check success. */
2392 if (lq_sta->search_better_tbl &&
2393 (iwl_tx_ant_restriction(priv) == IWL_ANT_OK_MULTI)) {
2394 /* If good success, continue using the "search" mode;
2395 * no need to send new link quality command, since we're
2396 * continuing to use the setup that we've been trying. */
2397 if (window->average_tpt > lq_sta->last_tpt) {
2399 IWL_DEBUG_RATE(priv, "LQ: SWITCHING TO NEW TABLE "
2400 "suc=%d cur-tpt=%d old-tpt=%d\n",
2401 window->success_ratio,
2402 window->average_tpt,
2405 if (!is_legacy(tbl->lq_type))
2406 lq_sta->enable_counter = 1;
2408 /* Swap tables; "search" becomes "active" */
2409 lq_sta->active_tbl = active_tbl;
2410 current_tpt = window->average_tpt;
2412 /* Else poor success; go back to mode in "active" table */
2415 IWL_DEBUG_RATE(priv, "LQ: GOING BACK TO THE OLD TABLE "
2416 "suc=%d cur-tpt=%d old-tpt=%d\n",
2417 window->success_ratio,
2418 window->average_tpt,
2421 /* Nullify "search" table */
2422 tbl->lq_type = LQ_NONE;
2424 /* Revert to "active" table */
2425 active_tbl = lq_sta->active_tbl;
2426 tbl = &(lq_sta->lq_info[active_tbl]);
2428 /* Revert to "active" rate and throughput info */
2429 index = iwl_hwrate_to_plcp_idx(tbl->current_rate);
2430 current_tpt = lq_sta->last_tpt;
2432 /* Need to set up a new rate table in uCode */
2436 /* Either way, we've made a decision; modulation mode
2437 * search is done, allow rate adjustment next time. */
2438 lq_sta->search_better_tbl = 0;
2439 done_search = 1; /* Don't switch modes below! */
2443 /* (Else) not in search of better modulation mode, try for better
2444 * starting rate, while staying in this mode. */
2445 high_low = rs_get_adjacent_rate(priv, index, rate_scale_index_msk,
2447 low = high_low & 0xff;
2448 high = (high_low >> 8) & 0xff;
2450 /* If user set max rate, dont allow higher than user constrain */
2451 if ((lq_sta->max_rate_idx != -1) &&
2452 (lq_sta->max_rate_idx < high))
2453 high = IWL_RATE_INVALID;
2455 sr = window->success_ratio;
2457 /* Collect measured throughputs for current and adjacent rates */
2458 current_tpt = window->average_tpt;
2459 if (low != IWL_RATE_INVALID)
2460 low_tpt = tbl->win[low].average_tpt;
2461 if (high != IWL_RATE_INVALID)
2462 high_tpt = tbl->win[high].average_tpt;
2466 /* Too many failures, decrease rate */
2467 if ((sr <= IWL_RATE_DECREASE_TH) || (current_tpt == 0)) {
2468 IWL_DEBUG_RATE(priv, "decrease rate because of low success_ratio\n");
2471 /* No throughput measured yet for adjacent rates; try increase. */
2472 } else if ((low_tpt == IWL_INVALID_VALUE) &&
2473 (high_tpt == IWL_INVALID_VALUE)) {
2475 if (high != IWL_RATE_INVALID && sr >= IWL_RATE_INCREASE_TH)
2477 else if (low != IWL_RATE_INVALID)
2481 /* Both adjacent throughputs are measured, but neither one has better
2482 * throughput; we're using the best rate, don't change it! */
2483 else if ((low_tpt != IWL_INVALID_VALUE) &&
2484 (high_tpt != IWL_INVALID_VALUE) &&
2485 (low_tpt < current_tpt) &&
2486 (high_tpt < current_tpt))
2489 /* At least one adjacent rate's throughput is measured,
2490 * and may have better performance. */
2492 /* Higher adjacent rate's throughput is measured */
2493 if (high_tpt != IWL_INVALID_VALUE) {
2494 /* Higher rate has better throughput */
2495 if (high_tpt > current_tpt &&
2496 sr >= IWL_RATE_INCREASE_TH) {
2502 /* Lower adjacent rate's throughput is measured */
2503 } else if (low_tpt != IWL_INVALID_VALUE) {
2504 /* Lower rate has better throughput */
2505 if (low_tpt > current_tpt) {
2506 IWL_DEBUG_RATE(priv,
2507 "decrease rate because of low tpt\n");
2509 } else if (sr >= IWL_RATE_INCREASE_TH) {
2515 /* Sanity check; asked for decrease, but success rate or throughput
2516 * has been good at old rate. Don't change it. */
2517 if ((scale_action == -1) && (low != IWL_RATE_INVALID) &&
2518 ((sr > IWL_RATE_HIGH_TH) ||
2519 (current_tpt > (100 * tbl->expected_tpt[low]))))
2521 if (!iwl_ht_enabled(priv) && !is_legacy(tbl->lq_type))
2523 if (iwl_tx_ant_restriction(priv) != IWL_ANT_OK_MULTI &&
2524 (is_mimo2(tbl->lq_type) || is_mimo3(tbl->lq_type)))
2527 if ((priv->bt_traffic_load >= IWL_BT_COEX_TRAFFIC_LOAD_HIGH) &&
2528 (is_mimo2(tbl->lq_type) || is_mimo3(tbl->lq_type))) {
2529 if (lq_sta->last_bt_traffic > priv->bt_traffic_load) {
2531 * don't set scale_action, don't want to scale up if
2532 * the rate scale doesn't otherwise think that is a
2535 } else if (lq_sta->last_bt_traffic <= priv->bt_traffic_load) {
2539 lq_sta->last_bt_traffic = priv->bt_traffic_load;
2541 if ((priv->bt_traffic_load >= IWL_BT_COEX_TRAFFIC_LOAD_HIGH) &&
2542 (is_mimo2(tbl->lq_type) || is_mimo3(tbl->lq_type))) {
2543 /* search for a new modulation */
2544 rs_stay_in_table(lq_sta, true);
2548 switch (scale_action) {
2550 /* Decrease starting rate, update uCode's rate table */
2551 if (low != IWL_RATE_INVALID) {
2558 /* Increase starting rate, update uCode's rate table */
2559 if (high != IWL_RATE_INVALID) {
2571 IWL_DEBUG_RATE(priv, "choose rate scale index %d action %d low %d "
2572 "high %d type %d\n",
2573 index, scale_action, low, high, tbl->lq_type);
2576 /* Replace uCode's rate table for the destination station. */
2578 rs_update_rate_tbl(priv, ctx, lq_sta, tbl, index, is_green);
2580 if (iwl_tx_ant_restriction(priv) == IWL_ANT_OK_MULTI) {
2581 /* Should we stay with this modulation mode,
2582 * or search for a new one? */
2583 rs_stay_in_table(lq_sta, false);
2586 * Search for new modulation mode if we're:
2587 * 1) Not changing rates right now
2588 * 2) Not just finishing up a search
2589 * 3) Allowing a new search
2591 if (!update_lq && !done_search && !lq_sta->stay_in_tbl && window->counter) {
2592 /* Save current throughput to compare with "search" throughput*/
2593 lq_sta->last_tpt = current_tpt;
2595 /* Select a new "search" modulation mode to try.
2596 * If one is found, set up the new "search" table. */
2597 if (is_legacy(tbl->lq_type))
2598 rs_move_legacy_other(priv, lq_sta, conf, sta, index);
2599 else if (is_siso(tbl->lq_type))
2600 rs_move_siso_to_other(priv, lq_sta, conf, sta, index);
2601 else if (is_mimo2(tbl->lq_type))
2602 rs_move_mimo2_to_other(priv, lq_sta, conf, sta, index);
2604 rs_move_mimo3_to_other(priv, lq_sta, conf, sta, index);
2606 /* If new "search" mode was selected, set up in uCode table */
2607 if (lq_sta->search_better_tbl) {
2608 /* Access the "search" table, clear its history. */
2609 tbl = &(lq_sta->lq_info[(1 - lq_sta->active_tbl)]);
2610 for (i = 0; i < IWL_RATE_COUNT; i++)
2611 rs_rate_scale_clear_window(&(tbl->win[i]));
2613 /* Use new "search" start rate */
2614 index = iwl_hwrate_to_plcp_idx(tbl->current_rate);
2616 IWL_DEBUG_RATE(priv, "Switch current mcs: %X index: %d\n",
2617 tbl->current_rate, index);
2618 rs_fill_link_cmd(priv, lq_sta, tbl->current_rate);
2619 iwl_send_lq_cmd(priv, ctx, &lq_sta->lq, CMD_ASYNC, false);
2624 if (done_search && !lq_sta->stay_in_tbl) {
2625 /* If the "active" (non-search) mode was legacy,
2626 * and we've tried switching antennas,
2627 * but we haven't been able to try HT modes (not available),
2628 * stay with best antenna legacy modulation for a while
2629 * before next round of mode comparisons. */
2630 tbl1 = &(lq_sta->lq_info[lq_sta->active_tbl]);
2631 if (is_legacy(tbl1->lq_type) && !conf_is_ht(conf) &&
2632 lq_sta->action_counter > tbl1->max_search) {
2633 IWL_DEBUG_RATE(priv, "LQ: STAY in legacy table\n");
2634 rs_set_stay_in_table(priv, 1, lq_sta);
2637 /* If we're in an HT mode, and all 3 mode switch actions
2638 * have been tried and compared, stay in this best modulation
2639 * mode for a while before next round of mode comparisons. */
2640 if (lq_sta->enable_counter &&
2641 (lq_sta->action_counter >= tbl1->max_search) &&
2642 iwl_ht_enabled(priv)) {
2643 if ((lq_sta->last_tpt > IWL_AGG_TPT_THREHOLD) &&
2644 (lq_sta->tx_agg_tid_en & (1 << tid)) &&
2645 (tid != IWL_MAX_TID_COUNT)) {
2646 u8 sta_id = lq_sta->lq.sta_id;
2647 tid_data = &priv->tid_data[sta_id][tid];
2648 if (tid_data->agg.state == IWL_AGG_OFF) {
2649 IWL_DEBUG_RATE(priv,
2650 "try to aggregate tid %d\n",
2652 rs_tl_turn_on_agg(priv, tid,
2656 rs_set_stay_in_table(priv, 0, lq_sta);
2661 tbl->current_rate = rate_n_flags_from_tbl(priv, tbl, index, is_green);
2662 lq_sta->last_txrate_idx = index;
2666 * rs_initialize_lq - Initialize a station's hardware rate table
2668 * The uCode's station table contains a table of fallback rates
2669 * for automatic fallback during transmission.
2671 * NOTE: This sets up a default set of values. These will be replaced later
2672 * if the driver's iwl-agn-rs rate scaling algorithm is used, instead of
2675 * NOTE: Run REPLY_ADD_STA command to set up station table entry, before
2676 * calling this function (which runs REPLY_TX_LINK_QUALITY_CMD,
2677 * which requires station table entry to exist).
2679 static void rs_initialize_lq(struct iwl_priv *priv,
2680 struct ieee80211_sta *sta,
2681 struct iwl_lq_sta *lq_sta)
2683 struct iwl_scale_tbl_info *tbl;
2687 u8 use_green = rs_use_green(sta);
2690 struct iwl_station_priv *sta_priv;
2691 struct iwl_rxon_context *ctx;
2693 if (!sta || !lq_sta)
2696 sta_priv = (void *)sta->drv_priv;
2697 ctx = sta_priv->ctx;
2699 i = lq_sta->last_txrate_idx;
2701 valid_tx_ant = hw_params(priv).valid_tx_ant;
2703 if (!lq_sta->search_better_tbl)
2704 active_tbl = lq_sta->active_tbl;
2706 active_tbl = 1 - lq_sta->active_tbl;
2708 tbl = &(lq_sta->lq_info[active_tbl]);
2710 if ((i < 0) || (i >= IWL_RATE_COUNT))
2713 rate = iwl_rates[i].plcp;
2714 tbl->ant_type = first_antenna(valid_tx_ant);
2715 rate |= tbl->ant_type << RATE_MCS_ANT_POS;
2717 if (i >= IWL_FIRST_CCK_RATE && i <= IWL_LAST_CCK_RATE)
2718 rate |= RATE_MCS_CCK_MSK;
2720 rs_get_tbl_info_from_mcs(rate, priv->band, tbl, &rate_idx);
2721 if (!rs_is_valid_ant(valid_tx_ant, tbl->ant_type))
2722 rs_toggle_antenna(valid_tx_ant, &rate, tbl);
2724 rate = rate_n_flags_from_tbl(priv, tbl, rate_idx, use_green);
2725 tbl->current_rate = rate;
2726 rs_set_expected_tpt_table(lq_sta, tbl);
2727 rs_fill_link_cmd(NULL, lq_sta, rate);
2728 priv->stations[lq_sta->lq.sta_id].lq = &lq_sta->lq;
2729 iwl_send_lq_cmd(priv, ctx, &lq_sta->lq, CMD_SYNC, true);
2732 static void rs_get_rate(void *priv_r, struct ieee80211_sta *sta, void *priv_sta,
2733 struct ieee80211_tx_rate_control *txrc)
2736 struct sk_buff *skb = txrc->skb;
2737 struct ieee80211_supported_band *sband = txrc->sband;
2738 struct iwl_op_mode *op_mode __maybe_unused =
2739 (struct iwl_op_mode *)priv_r;
2740 struct iwl_priv *priv __maybe_unused = IWL_OP_MODE_GET_DVM(op_mode);
2741 struct ieee80211_tx_info *info = IEEE80211_SKB_CB(skb);
2742 struct iwl_lq_sta *lq_sta = priv_sta;
2745 IWL_DEBUG_RATE_LIMIT(priv, "rate scale calculate new rate for skb\n");
2747 /* Get max rate if user set max rate */
2749 lq_sta->max_rate_idx = txrc->max_rate_idx;
2750 if ((sband->band == IEEE80211_BAND_5GHZ) &&
2751 (lq_sta->max_rate_idx != -1))
2752 lq_sta->max_rate_idx += IWL_FIRST_OFDM_RATE;
2753 if ((lq_sta->max_rate_idx < 0) ||
2754 (lq_sta->max_rate_idx >= IWL_RATE_COUNT))
2755 lq_sta->max_rate_idx = -1;
2758 /* Treat uninitialized rate scaling data same as non-existing. */
2759 if (lq_sta && !lq_sta->drv) {
2760 IWL_DEBUG_RATE(priv, "Rate scaling not initialized yet.\n");
2764 /* Send management frames and NO_ACK data using lowest rate. */
2765 if (rate_control_send_low(sta, priv_sta, txrc))
2768 rate_idx = lq_sta->last_txrate_idx;
2770 if (lq_sta->last_rate_n_flags & RATE_MCS_HT_MSK) {
2771 rate_idx -= IWL_FIRST_OFDM_RATE;
2772 /* 6M and 9M shared same MCS index */
2773 rate_idx = (rate_idx > 0) ? (rate_idx - 1) : 0;
2774 if (rs_extract_rate(lq_sta->last_rate_n_flags) >=
2775 IWL_RATE_MIMO3_6M_PLCP)
2776 rate_idx = rate_idx + (2 * MCS_INDEX_PER_STREAM);
2777 else if (rs_extract_rate(lq_sta->last_rate_n_flags) >=
2778 IWL_RATE_MIMO2_6M_PLCP)
2779 rate_idx = rate_idx + MCS_INDEX_PER_STREAM;
2780 info->control.rates[0].flags = IEEE80211_TX_RC_MCS;
2781 if (lq_sta->last_rate_n_flags & RATE_MCS_SGI_MSK)
2782 info->control.rates[0].flags |= IEEE80211_TX_RC_SHORT_GI;
2783 if (lq_sta->last_rate_n_flags & RATE_MCS_DUP_MSK)
2784 info->control.rates[0].flags |= IEEE80211_TX_RC_DUP_DATA;
2785 if (lq_sta->last_rate_n_flags & RATE_MCS_HT40_MSK)
2786 info->control.rates[0].flags |= IEEE80211_TX_RC_40_MHZ_WIDTH;
2787 if (lq_sta->last_rate_n_flags & RATE_MCS_GF_MSK)
2788 info->control.rates[0].flags |= IEEE80211_TX_RC_GREEN_FIELD;
2790 /* Check for invalid rates */
2791 if ((rate_idx < 0) || (rate_idx >= IWL_RATE_COUNT_LEGACY) ||
2792 ((sband->band == IEEE80211_BAND_5GHZ) &&
2793 (rate_idx < IWL_FIRST_OFDM_RATE)))
2794 rate_idx = rate_lowest_index(sband, sta);
2795 /* On valid 5 GHz rate, adjust index */
2796 else if (sband->band == IEEE80211_BAND_5GHZ)
2797 rate_idx -= IWL_FIRST_OFDM_RATE;
2798 info->control.rates[0].flags = 0;
2800 info->control.rates[0].idx = rate_idx;
2804 static void *rs_alloc_sta(void *priv_rate, struct ieee80211_sta *sta,
2807 struct iwl_station_priv *sta_priv = (struct iwl_station_priv *) sta->drv_priv;
2808 struct iwl_op_mode *op_mode __maybe_unused =
2809 (struct iwl_op_mode *)priv_rate;
2810 struct iwl_priv *priv __maybe_unused = IWL_OP_MODE_GET_DVM(op_mode);
2812 IWL_DEBUG_RATE(priv, "create station rate scale window\n");
2814 return &sta_priv->lq_sta;
2818 * Called after adding a new station to initialize rate scaling
2820 void iwl_rs_rate_init(struct iwl_priv *priv, struct ieee80211_sta *sta, u8 sta_id)
2823 struct ieee80211_hw *hw = priv->hw;
2824 struct ieee80211_conf *conf = &priv->hw->conf;
2825 struct ieee80211_sta_ht_cap *ht_cap = &sta->ht_cap;
2826 struct iwl_station_priv *sta_priv;
2827 struct iwl_lq_sta *lq_sta;
2828 struct ieee80211_supported_band *sband;
2830 sta_priv = (struct iwl_station_priv *) sta->drv_priv;
2831 lq_sta = &sta_priv->lq_sta;
2832 sband = hw->wiphy->bands[conf->channel->band];
2835 lq_sta->lq.sta_id = sta_id;
2837 for (j = 0; j < LQ_SIZE; j++)
2838 for (i = 0; i < IWL_RATE_COUNT; i++)
2839 rs_rate_scale_clear_window(&lq_sta->lq_info[j].win[i]);
2841 lq_sta->flush_timer = 0;
2842 lq_sta->supp_rates = sta->supp_rates[sband->band];
2843 for (j = 0; j < LQ_SIZE; j++)
2844 for (i = 0; i < IWL_RATE_COUNT; i++)
2845 rs_rate_scale_clear_window(&lq_sta->lq_info[j].win[i]);
2847 IWL_DEBUG_RATE(priv, "LQ: *** rate scale station global init for station %d ***\n",
2849 /* TODO: what is a good starting rate for STA? About middle? Maybe not
2850 * the lowest or the highest rate.. Could consider using RSSI from
2851 * previous packets? Need to have IEEE 802.1X auth succeed immediately
2855 lq_sta->max_rate_idx = -1;
2856 lq_sta->missed_rate_counter = IWL_MISSED_RATE_MAX;
2857 lq_sta->is_green = rs_use_green(sta);
2858 lq_sta->active_legacy_rate = priv->active_rate & ~(0x1000);
2859 lq_sta->band = priv->band;
2861 * active_siso_rate mask includes 9 MBits (bit 5), and CCK (bits 0-3),
2862 * supp_rates[] does not; shift to convert format, force 9 MBits off.
2864 lq_sta->active_siso_rate = ht_cap->mcs.rx_mask[0] << 1;
2865 lq_sta->active_siso_rate |= ht_cap->mcs.rx_mask[0] & 0x1;
2866 lq_sta->active_siso_rate &= ~((u16)0x2);
2867 lq_sta->active_siso_rate <<= IWL_FIRST_OFDM_RATE;
2870 lq_sta->active_mimo2_rate = ht_cap->mcs.rx_mask[1] << 1;
2871 lq_sta->active_mimo2_rate |= ht_cap->mcs.rx_mask[1] & 0x1;
2872 lq_sta->active_mimo2_rate &= ~((u16)0x2);
2873 lq_sta->active_mimo2_rate <<= IWL_FIRST_OFDM_RATE;
2875 lq_sta->active_mimo3_rate = ht_cap->mcs.rx_mask[2] << 1;
2876 lq_sta->active_mimo3_rate |= ht_cap->mcs.rx_mask[2] & 0x1;
2877 lq_sta->active_mimo3_rate &= ~((u16)0x2);
2878 lq_sta->active_mimo3_rate <<= IWL_FIRST_OFDM_RATE;
2880 IWL_DEBUG_RATE(priv, "SISO-RATE=%X MIMO2-RATE=%X MIMO3-RATE=%X\n",
2881 lq_sta->active_siso_rate,
2882 lq_sta->active_mimo2_rate,
2883 lq_sta->active_mimo3_rate);
2885 /* These values will be overridden later */
2886 lq_sta->lq.general_params.single_stream_ant_msk =
2887 first_antenna(hw_params(priv).valid_tx_ant);
2888 lq_sta->lq.general_params.dual_stream_ant_msk =
2889 hw_params(priv).valid_tx_ant &
2890 ~first_antenna(hw_params(priv).valid_tx_ant);
2891 if (!lq_sta->lq.general_params.dual_stream_ant_msk) {
2892 lq_sta->lq.general_params.dual_stream_ant_msk = ANT_AB;
2893 } else if (num_of_ant(hw_params(priv).valid_tx_ant) == 2) {
2894 lq_sta->lq.general_params.dual_stream_ant_msk =
2895 hw_params(priv).valid_tx_ant;
2898 /* as default allow aggregation for all tids */
2899 lq_sta->tx_agg_tid_en = IWL_AGG_ALL_TID;
2902 /* Set last_txrate_idx to lowest rate */
2903 lq_sta->last_txrate_idx = rate_lowest_index(sband, sta);
2904 if (sband->band == IEEE80211_BAND_5GHZ)
2905 lq_sta->last_txrate_idx += IWL_FIRST_OFDM_RATE;
2907 #ifdef CONFIG_IWLWIFI_DEVICE_TESTMODE
2908 priv->tm_fixed_rate = 0;
2910 #ifdef CONFIG_MAC80211_DEBUGFS
2911 lq_sta->dbg_fixed_rate = 0;
2914 rs_initialize_lq(priv, sta, lq_sta);
2917 static void rs_fill_link_cmd(struct iwl_priv *priv,
2918 struct iwl_lq_sta *lq_sta, u32 new_rate)
2920 struct iwl_scale_tbl_info tbl_type;
2923 int repeat_rate = 0;
2924 u8 ant_toggle_cnt = 0;
2925 u8 use_ht_possible = 1;
2926 u8 valid_tx_ant = 0;
2927 struct iwl_station_priv *sta_priv =
2928 container_of(lq_sta, struct iwl_station_priv, lq_sta);
2929 struct iwl_link_quality_cmd *lq_cmd = &lq_sta->lq;
2931 /* Override starting rate (index 0) if needed for debug purposes */
2932 rs_dbgfs_set_mcs(lq_sta, &new_rate, index);
2934 /* Interpret new_rate (rate_n_flags) */
2935 rs_get_tbl_info_from_mcs(new_rate, lq_sta->band,
2936 &tbl_type, &rate_idx);
2938 if (priv && priv->bt_full_concurrent) {
2941 first_antenna(hw_params(priv).valid_tx_ant);
2944 /* How many times should we repeat the initial rate? */
2945 if (is_legacy(tbl_type.lq_type)) {
2947 repeat_rate = IWL_NUMBER_TRY;
2949 repeat_rate = min(IWL_HT_NUMBER_TRY,
2950 LINK_QUAL_AGG_DISABLE_START_DEF - 1);
2953 lq_cmd->general_params.mimo_delimiter =
2954 is_mimo(tbl_type.lq_type) ? 1 : 0;
2956 /* Fill 1st table entry (index 0) */
2957 lq_cmd->rs_table[index].rate_n_flags = cpu_to_le32(new_rate);
2959 if (num_of_ant(tbl_type.ant_type) == 1) {
2960 lq_cmd->general_params.single_stream_ant_msk =
2962 } else if (num_of_ant(tbl_type.ant_type) == 2) {
2963 lq_cmd->general_params.dual_stream_ant_msk =
2965 } /* otherwise we don't modify the existing value */
2970 if (priv->bt_full_concurrent)
2971 valid_tx_ant = ANT_A;
2973 valid_tx_ant = hw_params(priv).valid_tx_ant;
2976 /* Fill rest of rate table */
2977 while (index < LINK_QUAL_MAX_RETRY_NUM) {
2978 /* Repeat initial/next rate.
2979 * For legacy IWL_NUMBER_TRY == 1, this loop will not execute.
2980 * For HT IWL_HT_NUMBER_TRY == 3, this executes twice. */
2981 while (repeat_rate > 0 && (index < LINK_QUAL_MAX_RETRY_NUM)) {
2982 if (is_legacy(tbl_type.lq_type)) {
2983 if (ant_toggle_cnt < NUM_TRY_BEFORE_ANT_TOGGLE)
2986 rs_toggle_antenna(valid_tx_ant,
2987 &new_rate, &tbl_type))
2991 /* Override next rate if needed for debug purposes */
2992 rs_dbgfs_set_mcs(lq_sta, &new_rate, index);
2994 /* Fill next table entry */
2995 lq_cmd->rs_table[index].rate_n_flags =
2996 cpu_to_le32(new_rate);
3001 rs_get_tbl_info_from_mcs(new_rate, lq_sta->band, &tbl_type,
3004 if (priv && priv->bt_full_concurrent) {
3007 first_antenna(hw_params(priv).valid_tx_ant);
3010 /* Indicate to uCode which entries might be MIMO.
3011 * If initial rate was MIMO, this will finally end up
3012 * as (IWL_HT_NUMBER_TRY * 2), after 2nd pass, otherwise 0. */
3013 if (is_mimo(tbl_type.lq_type))
3014 lq_cmd->general_params.mimo_delimiter = index;
3017 new_rate = rs_get_lower_rate(lq_sta, &tbl_type, rate_idx,
3020 /* How many times should we repeat the next rate? */
3021 if (is_legacy(tbl_type.lq_type)) {
3022 if (ant_toggle_cnt < NUM_TRY_BEFORE_ANT_TOGGLE)
3025 rs_toggle_antenna(valid_tx_ant,
3026 &new_rate, &tbl_type))
3029 repeat_rate = IWL_NUMBER_TRY;
3031 repeat_rate = IWL_HT_NUMBER_TRY;
3034 /* Don't allow HT rates after next pass.
3035 * rs_get_lower_rate() will change type to LQ_A or LQ_G. */
3036 use_ht_possible = 0;
3038 /* Override next rate if needed for debug purposes */
3039 rs_dbgfs_set_mcs(lq_sta, &new_rate, index);
3041 /* Fill next table entry */
3042 lq_cmd->rs_table[index].rate_n_flags = cpu_to_le32(new_rate);
3048 lq_cmd->agg_params.agg_frame_cnt_limit =
3049 sta_priv->max_agg_bufsize ?: LINK_QUAL_AGG_FRAME_LIMIT_DEF;
3050 lq_cmd->agg_params.agg_dis_start_th = LINK_QUAL_AGG_DISABLE_START_DEF;
3052 lq_cmd->agg_params.agg_time_limit =
3053 cpu_to_le16(LINK_QUAL_AGG_TIME_LIMIT_DEF);
3055 * overwrite if needed, pass aggregation time limit
3058 if (priv && cfg(priv)->bt_params &&
3059 cfg(priv)->bt_params->agg_time_limit &&
3060 priv->bt_traffic_load >= IWL_BT_COEX_TRAFFIC_LOAD_HIGH)
3061 lq_cmd->agg_params.agg_time_limit =
3062 cpu_to_le16(cfg(priv)->bt_params->agg_time_limit);
3065 static void *rs_alloc(struct ieee80211_hw *hw, struct dentry *debugfsdir)
3069 /* rate scale requires free function to be implemented */
3070 static void rs_free(void *priv_rate)
3075 static void rs_free_sta(void *priv_r, struct ieee80211_sta *sta,
3078 struct iwl_op_mode *op_mode __maybe_unused = priv_r;
3079 struct iwl_priv *priv __maybe_unused = IWL_OP_MODE_GET_DVM(op_mode);
3081 IWL_DEBUG_RATE(priv, "enter\n");
3082 IWL_DEBUG_RATE(priv, "leave\n");
3085 #ifdef CONFIG_MAC80211_DEBUGFS
3086 static void rs_dbgfs_set_mcs(struct iwl_lq_sta *lq_sta,
3087 u32 *rate_n_flags, int index)
3089 struct iwl_priv *priv;
3094 valid_tx_ant = hw_params(priv).valid_tx_ant;
3095 if (lq_sta->dbg_fixed_rate) {
3097 ((lq_sta->dbg_fixed_rate & RATE_MCS_ANT_ABC_MSK)
3098 >> RATE_MCS_ANT_POS);
3099 if ((valid_tx_ant & ant_sel_tx) == ant_sel_tx) {
3100 *rate_n_flags = lq_sta->dbg_fixed_rate;
3101 IWL_DEBUG_RATE(priv, "Fixed rate ON\n");
3103 lq_sta->dbg_fixed_rate = 0;
3105 "Invalid antenna selection 0x%X, Valid is 0x%X\n",
3106 ant_sel_tx, valid_tx_ant);
3107 IWL_DEBUG_RATE(priv, "Fixed rate OFF\n");
3110 IWL_DEBUG_RATE(priv, "Fixed rate OFF\n");
3114 static ssize_t rs_sta_dbgfs_scale_table_write(struct file *file,
3115 const char __user *user_buf, size_t count, loff_t *ppos)
3117 struct iwl_lq_sta *lq_sta = file->private_data;
3118 struct iwl_priv *priv;
3125 memset(buf, 0, sizeof(buf));
3126 buf_size = min(count, sizeof(buf) - 1);
3127 if (copy_from_user(buf, user_buf, buf_size))
3130 if (sscanf(buf, "%x", &parsed_rate) == 1)
3131 lq_sta->dbg_fixed_rate = parsed_rate;
3133 lq_sta->dbg_fixed_rate = 0;
3135 rs_program_fix_rate(priv, lq_sta);
3140 static ssize_t rs_sta_dbgfs_scale_table_read(struct file *file,
3141 char __user *user_buf, size_t count, loff_t *ppos)
3149 struct iwl_lq_sta *lq_sta = file->private_data;
3150 struct iwl_priv *priv;
3151 struct iwl_scale_tbl_info *tbl = &(lq_sta->lq_info[lq_sta->active_tbl]);
3154 buff = kmalloc(1024, GFP_KERNEL);
3158 desc += sprintf(buff+desc, "sta_id %d\n", lq_sta->lq.sta_id);
3159 desc += sprintf(buff+desc, "failed=%d success=%d rate=0%X\n",
3160 lq_sta->total_failed, lq_sta->total_success,
3161 lq_sta->active_legacy_rate);
3162 desc += sprintf(buff+desc, "fixed rate 0x%X\n",
3163 lq_sta->dbg_fixed_rate);
3164 desc += sprintf(buff+desc, "valid_tx_ant %s%s%s\n",
3165 (hw_params(priv).valid_tx_ant & ANT_A) ? "ANT_A," : "",
3166 (hw_params(priv).valid_tx_ant & ANT_B) ? "ANT_B," : "",
3167 (hw_params(priv).valid_tx_ant & ANT_C) ? "ANT_C" : "");
3168 desc += sprintf(buff+desc, "lq type %s\n",
3169 (is_legacy(tbl->lq_type)) ? "legacy" : "HT");
3170 if (is_Ht(tbl->lq_type)) {
3171 desc += sprintf(buff+desc, " %s",
3172 (is_siso(tbl->lq_type)) ? "SISO" :
3173 ((is_mimo2(tbl->lq_type)) ? "MIMO2" : "MIMO3"));
3174 desc += sprintf(buff+desc, " %s",
3175 (tbl->is_ht40) ? "40MHz" : "20MHz");
3176 desc += sprintf(buff+desc, " %s %s %s\n", (tbl->is_SGI) ? "SGI" : "",
3177 (lq_sta->is_green) ? "GF enabled" : "",
3178 (lq_sta->is_agg) ? "AGG on" : "");
3180 desc += sprintf(buff+desc, "last tx rate=0x%X\n",
3181 lq_sta->last_rate_n_flags);
3182 desc += sprintf(buff+desc, "general:"
3183 "flags=0x%X mimo-d=%d s-ant0x%x d-ant=0x%x\n",
3184 lq_sta->lq.general_params.flags,
3185 lq_sta->lq.general_params.mimo_delimiter,
3186 lq_sta->lq.general_params.single_stream_ant_msk,
3187 lq_sta->lq.general_params.dual_stream_ant_msk);
3189 desc += sprintf(buff+desc, "agg:"
3190 "time_limit=%d dist_start_th=%d frame_cnt_limit=%d\n",
3191 le16_to_cpu(lq_sta->lq.agg_params.agg_time_limit),
3192 lq_sta->lq.agg_params.agg_dis_start_th,
3193 lq_sta->lq.agg_params.agg_frame_cnt_limit);
3195 desc += sprintf(buff+desc,
3196 "Start idx [0]=0x%x [1]=0x%x [2]=0x%x [3]=0x%x\n",
3197 lq_sta->lq.general_params.start_rate_index[0],
3198 lq_sta->lq.general_params.start_rate_index[1],
3199 lq_sta->lq.general_params.start_rate_index[2],
3200 lq_sta->lq.general_params.start_rate_index[3]);
3202 for (i = 0; i < LINK_QUAL_MAX_RETRY_NUM; i++) {
3203 index = iwl_hwrate_to_plcp_idx(
3204 le32_to_cpu(lq_sta->lq.rs_table[i].rate_n_flags));
3205 if (is_legacy(tbl->lq_type)) {
3206 desc += sprintf(buff+desc, " rate[%d] 0x%X %smbps\n",
3207 i, le32_to_cpu(lq_sta->lq.rs_table[i].rate_n_flags),
3208 iwl_rate_mcs[index].mbps);
3210 desc += sprintf(buff+desc, " rate[%d] 0x%X %smbps (%s)\n",
3211 i, le32_to_cpu(lq_sta->lq.rs_table[i].rate_n_flags),
3212 iwl_rate_mcs[index].mbps, iwl_rate_mcs[index].mcs);
3216 ret = simple_read_from_buffer(user_buf, count, ppos, buff, desc);
3221 static const struct file_operations rs_sta_dbgfs_scale_table_ops = {
3222 .write = rs_sta_dbgfs_scale_table_write,
3223 .read = rs_sta_dbgfs_scale_table_read,
3224 .open = simple_open,
3225 .llseek = default_llseek,
3227 static ssize_t rs_sta_dbgfs_stats_table_read(struct file *file,
3228 char __user *user_buf, size_t count, loff_t *ppos)
3235 struct iwl_lq_sta *lq_sta = file->private_data;
3237 buff = kmalloc(1024, GFP_KERNEL);
3241 for (i = 0; i < LQ_SIZE; i++) {
3242 desc += sprintf(buff+desc,
3243 "%s type=%d SGI=%d HT40=%d DUP=%d GF=%d\n"
3245 lq_sta->active_tbl == i ? "*" : "x",
3246 lq_sta->lq_info[i].lq_type,
3247 lq_sta->lq_info[i].is_SGI,
3248 lq_sta->lq_info[i].is_ht40,
3249 lq_sta->lq_info[i].is_dup,
3251 lq_sta->lq_info[i].current_rate);
3252 for (j = 0; j < IWL_RATE_COUNT; j++) {
3253 desc += sprintf(buff+desc,
3254 "counter=%d success=%d %%=%d\n",
3255 lq_sta->lq_info[i].win[j].counter,
3256 lq_sta->lq_info[i].win[j].success_counter,
3257 lq_sta->lq_info[i].win[j].success_ratio);
3260 ret = simple_read_from_buffer(user_buf, count, ppos, buff, desc);
3265 static const struct file_operations rs_sta_dbgfs_stats_table_ops = {
3266 .read = rs_sta_dbgfs_stats_table_read,
3267 .open = simple_open,
3268 .llseek = default_llseek,
3271 static ssize_t rs_sta_dbgfs_rate_scale_data_read(struct file *file,
3272 char __user *user_buf, size_t count, loff_t *ppos)
3274 struct iwl_lq_sta *lq_sta = file->private_data;
3275 struct iwl_scale_tbl_info *tbl = &lq_sta->lq_info[lq_sta->active_tbl];
3279 if (is_Ht(tbl->lq_type))
3280 desc += sprintf(buff+desc,
3281 "Bit Rate= %d Mb/s\n",
3282 tbl->expected_tpt[lq_sta->last_txrate_idx]);
3284 desc += sprintf(buff+desc,
3285 "Bit Rate= %d Mb/s\n",
3286 iwl_rates[lq_sta->last_txrate_idx].ieee >> 1);
3288 return simple_read_from_buffer(user_buf, count, ppos, buff, desc);
3291 static const struct file_operations rs_sta_dbgfs_rate_scale_data_ops = {
3292 .read = rs_sta_dbgfs_rate_scale_data_read,
3293 .open = simple_open,
3294 .llseek = default_llseek,
3297 static void rs_add_debugfs(void *priv, void *priv_sta,
3300 struct iwl_lq_sta *lq_sta = priv_sta;
3301 lq_sta->rs_sta_dbgfs_scale_table_file =
3302 debugfs_create_file("rate_scale_table", S_IRUSR | S_IWUSR, dir,
3303 lq_sta, &rs_sta_dbgfs_scale_table_ops);
3304 lq_sta->rs_sta_dbgfs_stats_table_file =
3305 debugfs_create_file("rate_stats_table", S_IRUSR, dir,
3306 lq_sta, &rs_sta_dbgfs_stats_table_ops);
3307 lq_sta->rs_sta_dbgfs_rate_scale_data_file =
3308 debugfs_create_file("rate_scale_data", S_IRUSR, dir,
3309 lq_sta, &rs_sta_dbgfs_rate_scale_data_ops);
3310 lq_sta->rs_sta_dbgfs_tx_agg_tid_en_file =
3311 debugfs_create_u8("tx_agg_tid_enable", S_IRUSR | S_IWUSR, dir,
3312 &lq_sta->tx_agg_tid_en);
3316 static void rs_remove_debugfs(void *priv, void *priv_sta)
3318 struct iwl_lq_sta *lq_sta = priv_sta;
3319 debugfs_remove(lq_sta->rs_sta_dbgfs_scale_table_file);
3320 debugfs_remove(lq_sta->rs_sta_dbgfs_stats_table_file);
3321 debugfs_remove(lq_sta->rs_sta_dbgfs_rate_scale_data_file);
3322 debugfs_remove(lq_sta->rs_sta_dbgfs_tx_agg_tid_en_file);
3327 * Initialization of rate scaling information is done by driver after
3328 * the station is added. Since mac80211 calls this function before a
3329 * station is added we ignore it.
3331 static void rs_rate_init_stub(void *priv_r, struct ieee80211_supported_band *sband,
3332 struct ieee80211_sta *sta, void *priv_sta)
3335 static struct rate_control_ops rs_ops = {
3338 .tx_status = rs_tx_status,
3339 .get_rate = rs_get_rate,
3340 .rate_init = rs_rate_init_stub,
3343 .alloc_sta = rs_alloc_sta,
3344 .free_sta = rs_free_sta,
3345 #ifdef CONFIG_MAC80211_DEBUGFS
3346 .add_sta_debugfs = rs_add_debugfs,
3347 .remove_sta_debugfs = rs_remove_debugfs,
3351 int iwlagn_rate_control_register(void)
3353 return ieee80211_rate_control_register(&rs_ops);
3356 void iwlagn_rate_control_unregister(void)
3358 ieee80211_rate_control_unregister(&rs_ops);