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1// SPDX-License-Identifier: GPL-2.0-only2/******************************************************************************3 *4 * Copyright(c) 2005 - 2014, 2018 - 2023 Intel Corporation. All rights reserved.5 * Copyright(c) 2013 - 2015 Intel Mobile Communications GmbH6 * Copyright(c) 2016 - 2017 Intel Deutschland GmbH7 *****************************************************************************/8#include <linux/kernel.h>9#include <linux/skbuff.h>10#include <linux/slab.h>11#include <net/mac80211.h>12 13#include <linux/netdevice.h>14#include <linux/etherdevice.h>15#include <linux/delay.h>16 17#include <linux/workqueue.h>18#include "rs.h"19#include "fw-api.h"20#include "sta.h"21#include "iwl-op-mode.h"22#include "mvm.h"23#include "debugfs.h"24 25#define IWL_RATE_MAX_WINDOW 62 /* # tx in history window */26 27/* Calculations of success ratio are done in fixed point where 12800 is 100%.28 * Use this macro when dealing with thresholds consts set as a percentage29 */30#define RS_PERCENT(x) (128 * x)31 32static u8 rs_ht_to_legacy[] = {33 [IWL_RATE_MCS_0_INDEX] = IWL_RATE_6M_INDEX,34 [IWL_RATE_MCS_1_INDEX] = IWL_RATE_9M_INDEX,35 [IWL_RATE_MCS_2_INDEX] = IWL_RATE_12M_INDEX,36 [IWL_RATE_MCS_3_INDEX] = IWL_RATE_18M_INDEX,37 [IWL_RATE_MCS_4_INDEX] = IWL_RATE_24M_INDEX,38 [IWL_RATE_MCS_5_INDEX] = IWL_RATE_36M_INDEX,39 [IWL_RATE_MCS_6_INDEX] = IWL_RATE_48M_INDEX,40 [IWL_RATE_MCS_7_INDEX] = IWL_RATE_54M_INDEX,41 [IWL_RATE_MCS_8_INDEX] = IWL_RATE_54M_INDEX,42 [IWL_RATE_MCS_9_INDEX] = IWL_RATE_54M_INDEX,43};44 45static const u8 ant_toggle_lookup[] = {46 [ANT_NONE] = ANT_NONE,47 [ANT_A] = ANT_B,48 [ANT_B] = ANT_A,49 [ANT_AB] = ANT_AB,50};51 52#define IWL_DECLARE_RATE_INFO(r, s, rp, rn) \53 [IWL_RATE_##r##M_INDEX] = { IWL_RATE_##r##M_PLCP, \54 IWL_RATE_HT_SISO_MCS_##s##_PLCP, \55 IWL_RATE_HT_MIMO2_MCS_##s##_PLCP, \56 IWL_RATE_VHT_SISO_MCS_##s##_PLCP, \57 IWL_RATE_VHT_MIMO2_MCS_##s##_PLCP,\58 IWL_RATE_##rp##M_INDEX, \59 IWL_RATE_##rn##M_INDEX }60 61#define IWL_DECLARE_MCS_RATE(s) \62 [IWL_RATE_MCS_##s##_INDEX] = { IWL_RATE_INVM_PLCP, \63 IWL_RATE_HT_SISO_MCS_##s##_PLCP, \64 IWL_RATE_HT_MIMO2_MCS_##s##_PLCP, \65 IWL_RATE_VHT_SISO_MCS_##s##_PLCP, \66 IWL_RATE_VHT_MIMO2_MCS_##s##_PLCP, \67 IWL_RATE_INVM_INDEX, \68 IWL_RATE_INVM_INDEX }69 70/*71 * Parameter order:72 * rate, ht rate, prev rate, next rate73 *74 * If there isn't a valid next or previous rate then INV is used which75 * maps to IWL_RATE_INVALID76 *77 */78static const struct iwl_rs_rate_info iwl_rates[IWL_RATE_COUNT] = {79 IWL_DECLARE_RATE_INFO(1, INV, INV, 2), /* 1mbps */80 IWL_DECLARE_RATE_INFO(2, INV, 1, 5), /* 2mbps */81 IWL_DECLARE_RATE_INFO(5, INV, 2, 11), /*5.5mbps */82 IWL_DECLARE_RATE_INFO(11, INV, 9, 12), /* 11mbps */83 IWL_DECLARE_RATE_INFO(6, 0, 5, 11), /* 6mbps ; MCS 0 */84 IWL_DECLARE_RATE_INFO(9, INV, 6, 11), /* 9mbps */85 IWL_DECLARE_RATE_INFO(12, 1, 11, 18), /* 12mbps ; MCS 1 */86 IWL_DECLARE_RATE_INFO(18, 2, 12, 24), /* 18mbps ; MCS 2 */87 IWL_DECLARE_RATE_INFO(24, 3, 18, 36), /* 24mbps ; MCS 3 */88 IWL_DECLARE_RATE_INFO(36, 4, 24, 48), /* 36mbps ; MCS 4 */89 IWL_DECLARE_RATE_INFO(48, 5, 36, 54), /* 48mbps ; MCS 5 */90 IWL_DECLARE_RATE_INFO(54, 6, 48, INV), /* 54mbps ; MCS 6 */91 IWL_DECLARE_MCS_RATE(7), /* MCS 7 */92 IWL_DECLARE_MCS_RATE(8), /* MCS 8 */93 IWL_DECLARE_MCS_RATE(9), /* MCS 9 */94};95 96enum rs_action {97 RS_ACTION_STAY = 0,98 RS_ACTION_DOWNSCALE = -1,99 RS_ACTION_UPSCALE = 1,100};101 102enum rs_column_mode {103 RS_INVALID = 0,104 RS_LEGACY,105 RS_SISO,106 RS_MIMO2,107};108 109#define MAX_NEXT_COLUMNS 7110#define MAX_COLUMN_CHECKS 3111 112struct rs_tx_column;113 114typedef bool (*allow_column_func_t) (struct iwl_mvm *mvm,115 struct ieee80211_sta *sta,116 struct rs_rate *rate,117 const struct rs_tx_column *next_col);118 119struct rs_tx_column {120 enum rs_column_mode mode;121 u8 ant;122 bool sgi;123 enum rs_column next_columns[MAX_NEXT_COLUMNS];124 allow_column_func_t checks[MAX_COLUMN_CHECKS];125};126 127static bool rs_ant_allow(struct iwl_mvm *mvm, struct ieee80211_sta *sta,128 struct rs_rate *rate,129 const struct rs_tx_column *next_col)130{131 return iwl_mvm_bt_coex_is_ant_avail(mvm, next_col->ant);132}133 134static bool rs_mimo_allow(struct iwl_mvm *mvm, struct ieee80211_sta *sta,135 struct rs_rate *rate,136 const struct rs_tx_column *next_col)137{138 if (!sta->deflink.ht_cap.ht_supported)139 return false;140 141 if (sta->deflink.smps_mode == IEEE80211_SMPS_STATIC)142 return false;143 144 if (num_of_ant(iwl_mvm_get_valid_tx_ant(mvm)) < 2)145 return false;146 147 if (!iwl_mvm_bt_coex_is_mimo_allowed(mvm, sta))148 return false;149 150 if (mvm->nvm_data->sku_cap_mimo_disabled)151 return false;152 153 return true;154}155 156static bool rs_siso_allow(struct iwl_mvm *mvm, struct ieee80211_sta *sta,157 struct rs_rate *rate,158 const struct rs_tx_column *next_col)159{160 if (!sta->deflink.ht_cap.ht_supported)161 return false;162 163 return true;164}165 166static bool rs_sgi_allow(struct iwl_mvm *mvm, struct ieee80211_sta *sta,167 struct rs_rate *rate,168 const struct rs_tx_column *next_col)169{170 struct ieee80211_sta_ht_cap *ht_cap = &sta->deflink.ht_cap;171 struct ieee80211_sta_vht_cap *vht_cap = &sta->deflink.vht_cap;172 173 if (is_ht20(rate) && (ht_cap->cap &174 IEEE80211_HT_CAP_SGI_20))175 return true;176 if (is_ht40(rate) && (ht_cap->cap &177 IEEE80211_HT_CAP_SGI_40))178 return true;179 if (is_ht80(rate) && (vht_cap->cap &180 IEEE80211_VHT_CAP_SHORT_GI_80))181 return true;182 if (is_ht160(rate) && (vht_cap->cap &183 IEEE80211_VHT_CAP_SHORT_GI_160))184 return true;185 186 return false;187}188 189static const struct rs_tx_column rs_tx_columns[] = {190 [RS_COLUMN_LEGACY_ANT_A] = {191 .mode = RS_LEGACY,192 .ant = ANT_A,193 .next_columns = {194 RS_COLUMN_LEGACY_ANT_B,195 RS_COLUMN_SISO_ANT_A,196 RS_COLUMN_MIMO2,197 RS_COLUMN_INVALID,198 RS_COLUMN_INVALID,199 RS_COLUMN_INVALID,200 RS_COLUMN_INVALID,201 },202 .checks = {203 rs_ant_allow,204 },205 },206 [RS_COLUMN_LEGACY_ANT_B] = {207 .mode = RS_LEGACY,208 .ant = ANT_B,209 .next_columns = {210 RS_COLUMN_LEGACY_ANT_A,211 RS_COLUMN_SISO_ANT_B,212 RS_COLUMN_MIMO2,213 RS_COLUMN_INVALID,214 RS_COLUMN_INVALID,215 RS_COLUMN_INVALID,216 RS_COLUMN_INVALID,217 },218 .checks = {219 rs_ant_allow,220 },221 },222 [RS_COLUMN_SISO_ANT_A] = {223 .mode = RS_SISO,224 .ant = ANT_A,225 .next_columns = {226 RS_COLUMN_SISO_ANT_B,227 RS_COLUMN_MIMO2,228 RS_COLUMN_SISO_ANT_A_SGI,229 RS_COLUMN_LEGACY_ANT_A,230 RS_COLUMN_LEGACY_ANT_B,231 RS_COLUMN_INVALID,232 RS_COLUMN_INVALID,233 },234 .checks = {235 rs_siso_allow,236 rs_ant_allow,237 },238 },239 [RS_COLUMN_SISO_ANT_B] = {240 .mode = RS_SISO,241 .ant = ANT_B,242 .next_columns = {243 RS_COLUMN_SISO_ANT_A,244 RS_COLUMN_MIMO2,245 RS_COLUMN_SISO_ANT_B_SGI,246 RS_COLUMN_LEGACY_ANT_A,247 RS_COLUMN_LEGACY_ANT_B,248 RS_COLUMN_INVALID,249 RS_COLUMN_INVALID,250 },251 .checks = {252 rs_siso_allow,253 rs_ant_allow,254 },255 },256 [RS_COLUMN_SISO_ANT_A_SGI] = {257 .mode = RS_SISO,258 .ant = ANT_A,259 .sgi = true,260 .next_columns = {261 RS_COLUMN_SISO_ANT_B_SGI,262 RS_COLUMN_MIMO2_SGI,263 RS_COLUMN_SISO_ANT_A,264 RS_COLUMN_LEGACY_ANT_A,265 RS_COLUMN_LEGACY_ANT_B,266 RS_COLUMN_INVALID,267 RS_COLUMN_INVALID,268 },269 .checks = {270 rs_siso_allow,271 rs_ant_allow,272 rs_sgi_allow,273 },274 },275 [RS_COLUMN_SISO_ANT_B_SGI] = {276 .mode = RS_SISO,277 .ant = ANT_B,278 .sgi = true,279 .next_columns = {280 RS_COLUMN_SISO_ANT_A_SGI,281 RS_COLUMN_MIMO2_SGI,282 RS_COLUMN_SISO_ANT_B,283 RS_COLUMN_LEGACY_ANT_A,284 RS_COLUMN_LEGACY_ANT_B,285 RS_COLUMN_INVALID,286 RS_COLUMN_INVALID,287 },288 .checks = {289 rs_siso_allow,290 rs_ant_allow,291 rs_sgi_allow,292 },293 },294 [RS_COLUMN_MIMO2] = {295 .mode = RS_MIMO2,296 .ant = ANT_AB,297 .next_columns = {298 RS_COLUMN_SISO_ANT_A,299 RS_COLUMN_MIMO2_SGI,300 RS_COLUMN_LEGACY_ANT_A,301 RS_COLUMN_LEGACY_ANT_B,302 RS_COLUMN_INVALID,303 RS_COLUMN_INVALID,304 RS_COLUMN_INVALID,305 },306 .checks = {307 rs_mimo_allow,308 },309 },310 [RS_COLUMN_MIMO2_SGI] = {311 .mode = RS_MIMO2,312 .ant = ANT_AB,313 .sgi = true,314 .next_columns = {315 RS_COLUMN_SISO_ANT_A_SGI,316 RS_COLUMN_MIMO2,317 RS_COLUMN_LEGACY_ANT_A,318 RS_COLUMN_LEGACY_ANT_B,319 RS_COLUMN_INVALID,320 RS_COLUMN_INVALID,321 RS_COLUMN_INVALID,322 },323 .checks = {324 rs_mimo_allow,325 rs_sgi_allow,326 },327 },328};329 330static inline u8 rs_extract_rate(u32 rate_n_flags)331{332 /* also works for HT because bits 7:6 are zero there */333 return (u8)(rate_n_flags & RATE_LEGACY_RATE_MSK_V1);334}335 336static int iwl_hwrate_to_plcp_idx(u32 rate_n_flags)337{338 int idx = 0;339 340 if (rate_n_flags & RATE_MCS_HT_MSK_V1) {341 idx = rate_n_flags & RATE_HT_MCS_RATE_CODE_MSK_V1;342 idx += IWL_RATE_MCS_0_INDEX;343 344 /* skip 9M not supported in HT*/345 if (idx >= IWL_RATE_9M_INDEX)346 idx += 1;347 if ((idx >= IWL_FIRST_HT_RATE) && (idx <= IWL_LAST_HT_RATE))348 return idx;349 } else if (rate_n_flags & RATE_MCS_VHT_MSK_V1 ||350 rate_n_flags & RATE_MCS_HE_MSK_V1) {351 idx = rate_n_flags & RATE_VHT_MCS_RATE_CODE_MSK;352 idx += IWL_RATE_MCS_0_INDEX;353 354 /* skip 9M not supported in VHT*/355 if (idx >= IWL_RATE_9M_INDEX)356 idx++;357 if ((idx >= IWL_FIRST_VHT_RATE) && (idx <= IWL_LAST_VHT_RATE))358 return idx;359 if ((rate_n_flags & RATE_MCS_HE_MSK_V1) &&360 idx <= IWL_LAST_HE_RATE)361 return idx;362 } else {363 /* legacy rate format, search for match in table */364 365 u8 legacy_rate = rs_extract_rate(rate_n_flags);366 for (idx = 0; idx < ARRAY_SIZE(iwl_rates); idx++)367 if (iwl_rates[idx].plcp == legacy_rate)368 return idx;369 }370 371 return IWL_RATE_INVALID;372}373 374static void rs_rate_scale_perform(struct iwl_mvm *mvm,375 struct ieee80211_sta *sta,376 struct iwl_lq_sta *lq_sta,377 int tid, bool ndp);378static void rs_fill_lq_cmd(struct iwl_mvm *mvm,379 struct ieee80211_sta *sta,380 struct iwl_lq_sta *lq_sta,381 const struct rs_rate *initial_rate);382static void rs_stay_in_table(struct iwl_lq_sta *lq_sta, bool force_search);383 384/*385 * The following tables contain the expected throughput metrics for all rates386 *387 * 1, 2, 5.5, 11, 6, 9, 12, 18, 24, 36, 48, 54, 60 MBits388 *389 * where invalid entries are zeros.390 *391 * CCK rates are only valid in legacy table and will only be used in G392 * (2.4 GHz) band.393 */394static const u16 expected_tpt_legacy[IWL_RATE_COUNT] = {395 7, 13, 35, 58, 40, 57, 72, 98, 121, 154, 177, 186, 0, 0, 0396};397 398/* Expected TpT tables. 4 indexes:399 * 0 - NGI, 1 - SGI, 2 - AGG+NGI, 3 - AGG+SGI400 */401static const u16 expected_tpt_siso_20MHz[4][IWL_RATE_COUNT] = {402 {0, 0, 0, 0, 42, 0, 76, 102, 124, 159, 183, 193, 202, 216, 0},403 {0, 0, 0, 0, 46, 0, 82, 110, 132, 168, 192, 202, 210, 225, 0},404 {0, 0, 0, 0, 49, 0, 97, 145, 192, 285, 375, 420, 464, 551, 0},405 {0, 0, 0, 0, 54, 0, 108, 160, 213, 315, 415, 465, 513, 608, 0},406};407 408static const u16 expected_tpt_siso_40MHz[4][IWL_RATE_COUNT] = {409 {0, 0, 0, 0, 77, 0, 127, 160, 184, 220, 242, 250, 257, 269, 275},410 {0, 0, 0, 0, 83, 0, 135, 169, 193, 229, 250, 257, 264, 275, 280},411 {0, 0, 0, 0, 101, 0, 199, 295, 389, 570, 744, 828, 911, 1070, 1173},412 {0, 0, 0, 0, 112, 0, 220, 326, 429, 629, 819, 912, 1000, 1173, 1284},413};414 415static const u16 expected_tpt_siso_80MHz[4][IWL_RATE_COUNT] = {416 {0, 0, 0, 0, 130, 0, 191, 223, 244, 273, 288, 294, 298, 305, 308},417 {0, 0, 0, 0, 138, 0, 200, 231, 251, 279, 293, 298, 302, 308, 312},418 {0, 0, 0, 0, 217, 0, 429, 634, 834, 1220, 1585, 1760, 1931, 2258, 2466},419 {0, 0, 0, 0, 241, 0, 475, 701, 921, 1343, 1741, 1931, 2117, 2468, 2691},420};421 422static const u16 expected_tpt_siso_160MHz[4][IWL_RATE_COUNT] = {423 {0, 0, 0, 0, 191, 0, 244, 288, 298, 308, 313, 318, 323, 328, 330},424 {0, 0, 0, 0, 200, 0, 251, 293, 302, 312, 317, 322, 327, 332, 334},425 {0, 0, 0, 0, 439, 0, 875, 1307, 1736, 2584, 3419, 3831, 4240, 5049, 5581},426 {0, 0, 0, 0, 488, 0, 972, 1451, 1925, 2864, 3785, 4240, 4691, 5581, 6165},427};428 429static const u16 expected_tpt_mimo2_20MHz[4][IWL_RATE_COUNT] = {430 {0, 0, 0, 0, 74, 0, 123, 155, 179, 213, 235, 243, 250, 261, 0},431 {0, 0, 0, 0, 81, 0, 131, 164, 187, 221, 242, 250, 256, 267, 0},432 {0, 0, 0, 0, 98, 0, 193, 286, 375, 550, 718, 799, 878, 1032, 0},433 {0, 0, 0, 0, 109, 0, 214, 316, 414, 607, 790, 879, 965, 1132, 0},434};435 436static const u16 expected_tpt_mimo2_40MHz[4][IWL_RATE_COUNT] = {437 {0, 0, 0, 0, 123, 0, 182, 214, 235, 264, 279, 285, 289, 296, 300},438 {0, 0, 0, 0, 131, 0, 191, 222, 242, 270, 284, 289, 293, 300, 303},439 {0, 0, 0, 0, 200, 0, 390, 571, 741, 1067, 1365, 1505, 1640, 1894, 2053},440 {0, 0, 0, 0, 221, 0, 430, 630, 816, 1169, 1490, 1641, 1784, 2053, 2221},441};442 443static const u16 expected_tpt_mimo2_80MHz[4][IWL_RATE_COUNT] = {444 {0, 0, 0, 0, 182, 0, 240, 264, 278, 299, 308, 311, 313, 317, 319},445 {0, 0, 0, 0, 190, 0, 247, 269, 282, 302, 310, 313, 315, 319, 320},446 {0, 0, 0, 0, 428, 0, 833, 1215, 1577, 2254, 2863, 3147, 3418, 3913, 4219},447 {0, 0, 0, 0, 474, 0, 920, 1338, 1732, 2464, 3116, 3418, 3705, 4225, 4545},448};449 450static const u16 expected_tpt_mimo2_160MHz[4][IWL_RATE_COUNT] = {451 {0, 0, 0, 0, 240, 0, 278, 308, 313, 319, 322, 324, 328, 330, 334},452 {0, 0, 0, 0, 247, 0, 282, 310, 315, 320, 323, 325, 329, 332, 338},453 {0, 0, 0, 0, 875, 0, 1735, 2582, 3414, 5043, 6619, 7389, 8147, 9629, 10592},454 {0, 0, 0, 0, 971, 0, 1925, 2861, 3779, 5574, 7304, 8147, 8976, 10592, 11640},455};456 457static const char *rs_pretty_lq_type(enum iwl_table_type type)458{459 static const char * const lq_types[] = {460 [LQ_NONE] = "NONE",461 [LQ_LEGACY_A] = "LEGACY_A",462 [LQ_LEGACY_G] = "LEGACY_G",463 [LQ_HT_SISO] = "HT SISO",464 [LQ_HT_MIMO2] = "HT MIMO",465 [LQ_VHT_SISO] = "VHT SISO",466 [LQ_VHT_MIMO2] = "VHT MIMO",467 [LQ_HE_SISO] = "HE SISO",468 [LQ_HE_MIMO2] = "HE MIMO",469 };470 471 if (type < LQ_NONE || type >= LQ_MAX)472 return "UNKNOWN";473 474 return lq_types[type];475}476 477static char *rs_pretty_rate(const struct rs_rate *rate)478{479 static char buf[40];480 static const char * const legacy_rates[] = {481 [IWL_RATE_1M_INDEX] = "1M",482 [IWL_RATE_2M_INDEX] = "2M",483 [IWL_RATE_5M_INDEX] = "5.5M",484 [IWL_RATE_11M_INDEX] = "11M",485 [IWL_RATE_6M_INDEX] = "6M",486 [IWL_RATE_9M_INDEX] = "9M",487 [IWL_RATE_12M_INDEX] = "12M",488 [IWL_RATE_18M_INDEX] = "18M",489 [IWL_RATE_24M_INDEX] = "24M",490 [IWL_RATE_36M_INDEX] = "36M",491 [IWL_RATE_48M_INDEX] = "48M",492 [IWL_RATE_54M_INDEX] = "54M",493 };494 static const char *const ht_vht_rates[] = {495 [IWL_RATE_MCS_0_INDEX] = "MCS0",496 [IWL_RATE_MCS_1_INDEX] = "MCS1",497 [IWL_RATE_MCS_2_INDEX] = "MCS2",498 [IWL_RATE_MCS_3_INDEX] = "MCS3",499 [IWL_RATE_MCS_4_INDEX] = "MCS4",500 [IWL_RATE_MCS_5_INDEX] = "MCS5",501 [IWL_RATE_MCS_6_INDEX] = "MCS6",502 [IWL_RATE_MCS_7_INDEX] = "MCS7",503 [IWL_RATE_MCS_8_INDEX] = "MCS8",504 [IWL_RATE_MCS_9_INDEX] = "MCS9",505 };506 const char *rate_str;507 508 if (is_type_legacy(rate->type) && (rate->index <= IWL_RATE_54M_INDEX))509 rate_str = legacy_rates[rate->index];510 else if ((is_type_ht(rate->type) || is_type_vht(rate->type)) &&511 (rate->index >= IWL_RATE_MCS_0_INDEX) &&512 (rate->index <= IWL_RATE_MCS_9_INDEX))513 rate_str = ht_vht_rates[rate->index];514 else515 rate_str = NULL;516 517 sprintf(buf, "(%s|%s|%s)", rs_pretty_lq_type(rate->type),518 iwl_rs_pretty_ant(rate->ant), rate_str ?: "BAD_RATE");519 return buf;520}521 522static inline void rs_dump_rate(struct iwl_mvm *mvm, const struct rs_rate *rate,523 const char *prefix)524{525 IWL_DEBUG_RATE(mvm,526 "%s: %s BW: %d SGI: %d LDPC: %d STBC: %d\n",527 prefix, rs_pretty_rate(rate), rate->bw,528 rate->sgi, rate->ldpc, rate->stbc);529}530 531static void rs_rate_scale_clear_window(struct iwl_rate_scale_data *window)532{533 window->data = 0;534 window->success_counter = 0;535 window->success_ratio = IWL_INVALID_VALUE;536 window->counter = 0;537 window->average_tpt = IWL_INVALID_VALUE;538}539 540static void rs_rate_scale_clear_tbl_windows(struct iwl_mvm *mvm,541 struct iwl_scale_tbl_info *tbl)542{543 int i;544 545 IWL_DEBUG_RATE(mvm, "Clearing up window stats\n");546 for (i = 0; i < IWL_RATE_COUNT; i++)547 rs_rate_scale_clear_window(&tbl->win[i]);548 549 for (i = 0; i < ARRAY_SIZE(tbl->tpc_win); i++)550 rs_rate_scale_clear_window(&tbl->tpc_win[i]);551}552 553static inline u8 rs_is_valid_ant(u8 valid_antenna, u8 ant_type)554{555 return (ant_type & valid_antenna) == ant_type;556}557 558static int rs_tl_turn_on_agg_for_tid(struct iwl_mvm *mvm,559 struct iwl_lq_sta *lq_data, u8 tid,560 struct ieee80211_sta *sta)561{562 int ret;563 564 IWL_DEBUG_HT(mvm, "Starting Tx agg: STA: %pM tid: %d\n",565 sta->addr, tid);566 567 /* start BA session until the peer sends del BA */568 ret = ieee80211_start_tx_ba_session(sta, tid, 0);569 if (ret == -EAGAIN) {570 /*571 * driver and mac80211 is out of sync572 * this might be cause by reloading firmware573 * stop the tx ba session here574 */575 IWL_ERR(mvm, "Fail start Tx agg on tid: %d\n",576 tid);577 ieee80211_stop_tx_ba_session(sta, tid);578 }579 return ret;580}581 582static void rs_tl_turn_on_agg(struct iwl_mvm *mvm, struct iwl_mvm_sta *mvmsta,583 u8 tid, struct iwl_lq_sta *lq_sta,584 struct ieee80211_sta *sta)585{586 struct iwl_mvm_tid_data *tid_data;587 588 /*589 * In AP mode, tid can be equal to IWL_MAX_TID_COUNT590 * when the frame is not QoS591 */592 if (WARN_ON_ONCE(tid > IWL_MAX_TID_COUNT)) {593 IWL_ERR(mvm, "tid exceeds max TID count: %d/%d\n",594 tid, IWL_MAX_TID_COUNT);595 return;596 } else if (tid == IWL_MAX_TID_COUNT) {597 return;598 }599 600 tid_data = &mvmsta->tid_data[tid];601 if (mvmsta->sta_state >= IEEE80211_STA_AUTHORIZED &&602 tid_data->state == IWL_AGG_OFF &&603 (lq_sta->tx_agg_tid_en & BIT(tid)) &&604 tid_data->tx_count_last >= IWL_MVM_RS_AGG_START_THRESHOLD) {605 IWL_DEBUG_RATE(mvm, "try to aggregate tid %d\n", tid);606 if (rs_tl_turn_on_agg_for_tid(mvm, lq_sta, tid, sta) == 0)607 tid_data->state = IWL_AGG_QUEUED;608 }609}610 611static inline int get_num_of_ant_from_rate(u32 rate_n_flags)612{613 return !!(rate_n_flags & RATE_MCS_ANT_A_MSK) +614 !!(rate_n_flags & RATE_MCS_ANT_B_MSK);615}616 617/*618 * Static function to get the expected throughput from an iwl_scale_tbl_info619 * that wraps a NULL pointer check620 */621static s32 get_expected_tpt(struct iwl_scale_tbl_info *tbl, int rs_index)622{623 if (tbl->expected_tpt)624 return tbl->expected_tpt[rs_index];625 return 0;626}627 628/*629 * rs_collect_tx_data - Update the success/failure sliding window630 *631 * We keep a sliding window of the last 62 packets transmitted632 * at this rate. window->data contains the bitmask of successful633 * packets.634 */635static int _rs_collect_tx_data(struct iwl_mvm *mvm,636 struct iwl_scale_tbl_info *tbl,637 int scale_index, int attempts, int successes,638 struct iwl_rate_scale_data *window)639{640 static const u64 mask = (((u64)1) << (IWL_RATE_MAX_WINDOW - 1));641 s32 fail_count, tpt;642 643 /* Get expected throughput */644 tpt = get_expected_tpt(tbl, scale_index);645 646 /*647 * Keep track of only the latest 62 tx frame attempts in this rate's648 * history window; anything older isn't really relevant any more.649 * If we have filled up the sliding window, drop the oldest attempt;650 * if the oldest attempt (highest bit in bitmap) shows "success",651 * subtract "1" from the success counter (this is the main reason652 * we keep these bitmaps!).653 */654 while (attempts > 0) {655 if (window->counter >= IWL_RATE_MAX_WINDOW) {656 /* remove earliest */657 window->counter = IWL_RATE_MAX_WINDOW - 1;658 659 if (window->data & mask) {660 window->data &= ~mask;661 window->success_counter--;662 }663 }664 665 /* Increment frames-attempted counter */666 window->counter++;667 668 /* Shift bitmap by one frame to throw away oldest history */669 window->data <<= 1;670 671 /* Mark the most recent #successes attempts as successful */672 if (successes > 0) {673 window->success_counter++;674 window->data |= 0x1;675 successes--;676 }677 678 attempts--;679 }680 681 /* Calculate current success ratio, avoid divide-by-0! */682 if (window->counter > 0)683 window->success_ratio = 128 * (100 * window->success_counter)684 / window->counter;685 else686 window->success_ratio = IWL_INVALID_VALUE;687 688 fail_count = window->counter - window->success_counter;689 690 /* Calculate average throughput, if we have enough history. */691 if ((fail_count >= IWL_MVM_RS_RATE_MIN_FAILURE_TH) ||692 (window->success_counter >= IWL_MVM_RS_RATE_MIN_SUCCESS_TH))693 window->average_tpt = (window->success_ratio * tpt + 64) / 128;694 else695 window->average_tpt = IWL_INVALID_VALUE;696 697 return 0;698}699 700static int rs_collect_tpc_data(struct iwl_mvm *mvm,701 struct iwl_lq_sta *lq_sta,702 struct iwl_scale_tbl_info *tbl,703 int scale_index, int attempts, int successes,704 u8 reduced_txp)705{706 struct iwl_rate_scale_data *window = NULL;707 708 if (WARN_ON_ONCE(reduced_txp > TPC_MAX_REDUCTION))709 return -EINVAL;710 711 window = &tbl->tpc_win[reduced_txp];712 return _rs_collect_tx_data(mvm, tbl, scale_index, attempts, successes,713 window);714}715 716static void rs_update_tid_tpt_stats(struct iwl_mvm *mvm,717 struct iwl_mvm_sta *mvmsta,718 u8 tid, int successes)719{720 struct iwl_mvm_tid_data *tid_data;721 722 if (tid >= IWL_MAX_TID_COUNT)723 return;724 725 tid_data = &mvmsta->tid_data[tid];726 727 /*728 * Measure if there're enough successful transmits per second.729 * These statistics are used only to decide if we can start a730 * BA session, so it should be updated only when A-MPDU is731 * off.732 */733 if (tid_data->state != IWL_AGG_OFF)734 return;735 736 if (time_is_before_jiffies(tid_data->tpt_meas_start + HZ) ||737 (tid_data->tx_count >= IWL_MVM_RS_AGG_START_THRESHOLD)) {738 tid_data->tx_count_last = tid_data->tx_count;739 tid_data->tx_count = 0;740 tid_data->tpt_meas_start = jiffies;741 } else {742 tid_data->tx_count += successes;743 }744}745 746static int rs_collect_tlc_data(struct iwl_mvm *mvm,747 struct iwl_mvm_sta *mvmsta, u8 tid,748 struct iwl_scale_tbl_info *tbl,749 int scale_index, int attempts, int successes)750{751 struct iwl_rate_scale_data *window = NULL;752 753 if (scale_index < 0 || scale_index >= IWL_RATE_COUNT)754 return -EINVAL;755 756 if (tbl->column != RS_COLUMN_INVALID) {757 struct lq_sta_pers *pers = &mvmsta->deflink.lq_sta.rs_drv.pers;758 759 pers->tx_stats[tbl->column][scale_index].total += attempts;760 pers->tx_stats[tbl->column][scale_index].success += successes;761 }762 763 rs_update_tid_tpt_stats(mvm, mvmsta, tid, successes);764 765 /* Select window for current tx bit rate */766 window = &(tbl->win[scale_index]);767 return _rs_collect_tx_data(mvm, tbl, scale_index, attempts, successes,768 window);769}770 771/* Convert rs_rate object into ucode rate bitmask */772static u32 ucode_rate_from_rs_rate(struct iwl_mvm *mvm,773 struct rs_rate *rate)774{775 u32 ucode_rate = 0;776 int index = rate->index;777 778 ucode_rate |= ((rate->ant << RATE_MCS_ANT_POS) &779 RATE_MCS_ANT_AB_MSK);780 781 if (is_legacy(rate)) {782 ucode_rate |= iwl_rates[index].plcp;783 if (index >= IWL_FIRST_CCK_RATE && index <= IWL_LAST_CCK_RATE)784 ucode_rate |= RATE_MCS_CCK_MSK_V1;785 return ucode_rate;786 }787 788 /* set RTS protection for all non legacy rates789 * This helps with congested environments reducing the conflict cost to790 * RTS retries only, instead of the entire BA packet.791 */792 ucode_rate |= RATE_MCS_RTS_REQUIRED_MSK;793 794 if (is_ht(rate)) {795 if (index < IWL_FIRST_HT_RATE || index > IWL_LAST_HT_RATE) {796 IWL_ERR(mvm, "Invalid HT rate index %d\n", index);797 index = IWL_LAST_HT_RATE;798 }799 ucode_rate |= RATE_MCS_HT_MSK_V1;800 801 if (is_ht_siso(rate))802 ucode_rate |= iwl_rates[index].plcp_ht_siso;803 else if (is_ht_mimo2(rate))804 ucode_rate |= iwl_rates[index].plcp_ht_mimo2;805 else806 WARN_ON_ONCE(1);807 } else if (is_vht(rate)) {808 if (index < IWL_FIRST_VHT_RATE || index > IWL_LAST_VHT_RATE) {809 IWL_ERR(mvm, "Invalid VHT rate index %d\n", index);810 index = IWL_LAST_VHT_RATE;811 }812 ucode_rate |= RATE_MCS_VHT_MSK_V1;813 if (is_vht_siso(rate))814 ucode_rate |= iwl_rates[index].plcp_vht_siso;815 else if (is_vht_mimo2(rate))816 ucode_rate |= iwl_rates[index].plcp_vht_mimo2;817 else818 WARN_ON_ONCE(1);819 820 } else {821 IWL_ERR(mvm, "Invalid rate->type %d\n", rate->type);822 }823 824 if (is_siso(rate) && rate->stbc) {825 /* To enable STBC we need to set both a flag and ANT_AB */826 ucode_rate |= RATE_MCS_ANT_AB_MSK;827 ucode_rate |= RATE_MCS_STBC_MSK;828 }829 830 ucode_rate |= rate->bw;831 if (rate->sgi)832 ucode_rate |= RATE_MCS_SGI_MSK_V1;833 if (rate->ldpc)834 ucode_rate |= RATE_MCS_LDPC_MSK_V1;835 836 return ucode_rate;837}838 839/* Convert a ucode rate into an rs_rate object */840static int rs_rate_from_ucode_rate(const u32 ucode_rate,841 enum nl80211_band band,842 struct rs_rate *rate)843{844 u32 ant_msk = ucode_rate & RATE_MCS_ANT_AB_MSK;845 u8 num_of_ant = get_num_of_ant_from_rate(ucode_rate);846 u8 nss;847 848 memset(rate, 0, sizeof(*rate));849 rate->index = iwl_hwrate_to_plcp_idx(ucode_rate);850 851 if (rate->index == IWL_RATE_INVALID)852 return -EINVAL;853 854 rate->ant = (ant_msk >> RATE_MCS_ANT_POS);855 856 /* Legacy */857 if (!(ucode_rate & RATE_MCS_HT_MSK_V1) &&858 !(ucode_rate & RATE_MCS_VHT_MSK_V1) &&859 !(ucode_rate & RATE_MCS_HE_MSK_V1)) {860 if (num_of_ant == 1) {861 if (band == NL80211_BAND_5GHZ)862 rate->type = LQ_LEGACY_A;863 else864 rate->type = LQ_LEGACY_G;865 }866 867 return 0;868 }869 870 /* HT, VHT or HE */871 if (ucode_rate & RATE_MCS_SGI_MSK_V1)872 rate->sgi = true;873 if (ucode_rate & RATE_MCS_LDPC_MSK_V1)874 rate->ldpc = true;875 if (ucode_rate & RATE_MCS_STBC_MSK)876 rate->stbc = true;877 if (ucode_rate & RATE_MCS_BF_MSK)878 rate->bfer = true;879 880 rate->bw = ucode_rate & RATE_MCS_CHAN_WIDTH_MSK_V1;881 882 if (ucode_rate & RATE_MCS_HT_MSK_V1) {883 nss = ((ucode_rate & RATE_HT_MCS_NSS_MSK_V1) >>884 RATE_HT_MCS_NSS_POS_V1) + 1;885 886 if (nss == 1) {887 rate->type = LQ_HT_SISO;888 WARN_ONCE(!rate->stbc && !rate->bfer && num_of_ant != 1,889 "stbc %d bfer %d",890 rate->stbc, rate->bfer);891 } else if (nss == 2) {892 rate->type = LQ_HT_MIMO2;893 WARN_ON_ONCE(num_of_ant != 2);894 } else {895 WARN_ON_ONCE(1);896 }897 } else if (ucode_rate & RATE_MCS_VHT_MSK_V1) {898 nss = FIELD_GET(RATE_MCS_NSS_MSK, ucode_rate) + 1;899 900 if (nss == 1) {901 rate->type = LQ_VHT_SISO;902 WARN_ONCE(!rate->stbc && !rate->bfer && num_of_ant != 1,903 "stbc %d bfer %d",904 rate->stbc, rate->bfer);905 } else if (nss == 2) {906 rate->type = LQ_VHT_MIMO2;907 WARN_ON_ONCE(num_of_ant != 2);908 } else {909 WARN_ON_ONCE(1);910 }911 } else if (ucode_rate & RATE_MCS_HE_MSK_V1) {912 nss = FIELD_GET(RATE_MCS_NSS_MSK, ucode_rate) + 1;913 914 if (nss == 1) {915 rate->type = LQ_HE_SISO;916 WARN_ONCE(!rate->stbc && !rate->bfer && num_of_ant != 1,917 "stbc %d bfer %d", rate->stbc, rate->bfer);918 } else if (nss == 2) {919 rate->type = LQ_HE_MIMO2;920 WARN_ON_ONCE(num_of_ant != 2);921 } else {922 WARN_ON_ONCE(1);923 }924 }925 926 WARN_ON_ONCE(rate->bw == RATE_MCS_CHAN_WIDTH_80 &&927 !is_he(rate) && !is_vht(rate));928 929 return 0;930}931 932/* switch to another antenna/antennas and return 1 */933/* if no other valid antenna found, return 0 */934static int rs_toggle_antenna(u32 valid_ant, struct rs_rate *rate)935{936 u8 new_ant_type;937 938 if (!rs_is_valid_ant(valid_ant, rate->ant))939 return 0;940 941 new_ant_type = ant_toggle_lookup[rate->ant];942 943 while ((new_ant_type != rate->ant) &&944 !rs_is_valid_ant(valid_ant, new_ant_type))945 new_ant_type = ant_toggle_lookup[new_ant_type];946 947 if (new_ant_type == rate->ant)948 return 0;949 950 rate->ant = new_ant_type;951 952 return 1;953}954 955static u16 rs_get_supported_rates(struct iwl_lq_sta *lq_sta,956 struct rs_rate *rate)957{958 if (is_legacy(rate))959 return lq_sta->active_legacy_rate;960 else if (is_siso(rate))961 return lq_sta->active_siso_rate;962 else if (is_mimo2(rate))963 return lq_sta->active_mimo2_rate;964 965 WARN_ON_ONCE(1);966 return 0;967}968 969static u16 rs_get_adjacent_rate(struct iwl_mvm *mvm, u8 index, u16 rate_mask,970 int rate_type)971{972 u8 high = IWL_RATE_INVALID;973 u8 low = IWL_RATE_INVALID;974 975 /* 802.11A or ht walks to the next literal adjacent rate in976 * the rate table */977 if (is_type_a_band(rate_type) || !is_type_legacy(rate_type)) {978 int i;979 u32 mask;980 981 /* Find the previous rate that is in the rate mask */982 i = index - 1;983 if (i >= 0)984 mask = BIT(i);985 for (; i >= 0; i--, mask >>= 1) {986 if (rate_mask & mask) {987 low = i;988 break;989 }990 }991 992 /* Find the next rate that is in the rate mask */993 i = index + 1;994 for (mask = (1 << i); i < IWL_RATE_COUNT; i++, mask <<= 1) {995 if (rate_mask & mask) {996 high = i;997 break;998 }999 }1000 1001 return (high << 8) | low;1002 }1003 1004 low = index;1005 while (low != IWL_RATE_INVALID) {1006 low = iwl_rates[low].prev_rs;1007 if (low == IWL_RATE_INVALID)1008 break;1009 if (rate_mask & (1 << low))1010 break;1011 }1012 1013 high = index;1014 while (high != IWL_RATE_INVALID) {1015 high = iwl_rates[high].next_rs;1016 if (high == IWL_RATE_INVALID)1017 break;1018 if (rate_mask & (1 << high))1019 break;1020 }1021 1022 return (high << 8) | low;1023}1024 1025static inline bool rs_rate_supported(struct iwl_lq_sta *lq_sta,1026 struct rs_rate *rate)1027{1028 return BIT(rate->index) & rs_get_supported_rates(lq_sta, rate);1029}1030 1031/* Get the next supported lower rate in the current column.1032 * Return true if bottom rate in the current column was reached1033 */1034static bool rs_get_lower_rate_in_column(struct iwl_lq_sta *lq_sta,1035 struct rs_rate *rate)1036{1037 u8 low;1038 u16 high_low;1039 u16 rate_mask;1040 struct iwl_mvm *mvm = lq_sta->pers.drv;1041 1042 rate_mask = rs_get_supported_rates(lq_sta, rate);1043 high_low = rs_get_adjacent_rate(mvm, rate->index, rate_mask,1044 rate->type);1045 low = high_low & 0xff;1046 1047 /* Bottom rate of column reached */1048 if (low == IWL_RATE_INVALID)1049 return true;1050 1051 rate->index = low;1052 return false;1053}1054 1055/* Get the next rate to use following a column downgrade */1056static void rs_get_lower_rate_down_column(struct iwl_lq_sta *lq_sta,1057 struct rs_rate *rate)1058{1059 struct iwl_mvm *mvm = lq_sta->pers.drv;1060 1061 if (is_legacy(rate)) {1062 /* No column to downgrade from Legacy */1063 return;1064 } else if (is_siso(rate)) {1065 /* Downgrade to Legacy if we were in SISO */1066 if (lq_sta->band == NL80211_BAND_5GHZ)1067 rate->type = LQ_LEGACY_A;1068 else1069 rate->type = LQ_LEGACY_G;1070 1071 rate->bw = RATE_MCS_CHAN_WIDTH_20;1072 1073 if (WARN_ON_ONCE(rate->index < IWL_RATE_MCS_0_INDEX))1074 rate->index = rs_ht_to_legacy[IWL_RATE_MCS_0_INDEX];1075 else if (WARN_ON_ONCE(rate->index > IWL_RATE_MCS_9_INDEX))1076 rate->index = rs_ht_to_legacy[IWL_RATE_MCS_9_INDEX];1077 else1078 rate->index = rs_ht_to_legacy[rate->index];1079 1080 rate->ldpc = false;1081 } else {1082 /* Downgrade to SISO with same MCS if in MIMO */1083 rate->type = is_vht_mimo2(rate) ?1084 LQ_VHT_SISO : LQ_HT_SISO;1085 }1086 1087 if (num_of_ant(rate->ant) > 1)1088 rate->ant = first_antenna(iwl_mvm_get_valid_tx_ant(mvm));1089 1090 /* Relevant in both switching to SISO or Legacy */1091 rate->sgi = false;1092 1093 if (!rs_rate_supported(lq_sta, rate))1094 rs_get_lower_rate_in_column(lq_sta, rate);1095}1096 1097/* Check if both rates share the same column */1098static inline bool rs_rate_column_match(struct rs_rate *a,1099 struct rs_rate *b)1100{1101 bool ant_match;1102 1103 if (a->stbc || a->bfer)1104 ant_match = (b->ant == ANT_A || b->ant == ANT_B);1105 else1106 ant_match = (a->ant == b->ant);1107 1108 return (a->type == b->type) && (a->bw == b->bw) && (a->sgi == b->sgi)1109 && ant_match;1110}1111 1112static inline enum rs_column rs_get_column_from_rate(struct rs_rate *rate)1113{1114 if (is_legacy(rate)) {1115 if (rate->ant == ANT_A)1116 return RS_COLUMN_LEGACY_ANT_A;1117 1118 if (rate->ant == ANT_B)1119 return RS_COLUMN_LEGACY_ANT_B;1120 1121 goto err;1122 }1123 1124 if (is_siso(rate)) {1125 if (rate->ant == ANT_A || rate->stbc || rate->bfer)1126 return rate->sgi ? RS_COLUMN_SISO_ANT_A_SGI :1127 RS_COLUMN_SISO_ANT_A;1128 1129 if (rate->ant == ANT_B)1130 return rate->sgi ? RS_COLUMN_SISO_ANT_B_SGI :1131 RS_COLUMN_SISO_ANT_B;1132 1133 goto err;1134 }1135 1136 if (is_mimo(rate))1137 return rate->sgi ? RS_COLUMN_MIMO2_SGI : RS_COLUMN_MIMO2;1138 1139err:1140 return RS_COLUMN_INVALID;1141}1142 1143static u8 rs_get_tid(struct ieee80211_hdr *hdr)1144{1145 u8 tid = IWL_MAX_TID_COUNT;1146 1147 if (ieee80211_is_data_qos(hdr->frame_control)) {1148 u8 *qc = ieee80211_get_qos_ctl(hdr);1149 tid = qc[0] & 0xf;1150 }1151 1152 if (unlikely(tid > IWL_MAX_TID_COUNT))1153 tid = IWL_MAX_TID_COUNT;1154 1155 return tid;1156}1157 1158/*1159 * mac80211 sends us Tx status1160 */1161static void rs_drv_mac80211_tx_status(void *mvm_r,1162 struct ieee80211_supported_band *sband,1163 struct ieee80211_sta *sta, void *priv_sta,1164 struct sk_buff *skb)1165{1166 struct ieee80211_hdr *hdr = (struct ieee80211_hdr *)skb->data;1167 struct iwl_op_mode *op_mode = mvm_r;1168 struct iwl_mvm *mvm = IWL_OP_MODE_GET_MVM(op_mode);1169 struct ieee80211_tx_info *info = IEEE80211_SKB_CB(skb);1170 struct iwl_mvm_sta *mvmsta = iwl_mvm_sta_from_mac80211(sta);1171 1172 if (!mvmsta->vif)1173 return;1174 1175 if (!ieee80211_is_data(hdr->frame_control) ||1176 info->flags & IEEE80211_TX_CTL_NO_ACK)1177 return;1178 1179 iwl_mvm_rs_tx_status(mvm, sta, rs_get_tid(hdr), info,1180 ieee80211_is_qos_nullfunc(hdr->frame_control));1181}1182 1183/*1184 * Begin a period of staying with a selected modulation mode.1185 * Set "stay_in_tbl" flag to prevent any mode switches.1186 * Set frame tx success limits according to legacy vs. high-throughput,1187 * and reset overall (spanning all rates) tx success history statistics.1188 * These control how long we stay using same modulation mode before1189 * searching for a new mode.1190 */1191static void rs_set_stay_in_table(struct iwl_mvm *mvm, u8 is_legacy,1192 struct iwl_lq_sta *lq_sta)1193{1194 IWL_DEBUG_RATE(mvm, "Moving to RS_STATE_STAY_IN_COLUMN\n");1195 lq_sta->rs_state = RS_STATE_STAY_IN_COLUMN;1196 if (is_legacy) {1197 lq_sta->table_count_limit = IWL_MVM_RS_LEGACY_TABLE_COUNT;1198 lq_sta->max_failure_limit = IWL_MVM_RS_LEGACY_FAILURE_LIMIT;1199 lq_sta->max_success_limit = IWL_MVM_RS_LEGACY_SUCCESS_LIMIT;1200 } else {1201 lq_sta->table_count_limit = IWL_MVM_RS_NON_LEGACY_TABLE_COUNT;1202 lq_sta->max_failure_limit = IWL_MVM_RS_NON_LEGACY_FAILURE_LIMIT;1203 lq_sta->max_success_limit = IWL_MVM_RS_NON_LEGACY_SUCCESS_LIMIT;1204 }1205 lq_sta->table_count = 0;1206 lq_sta->total_failed = 0;1207 lq_sta->total_success = 0;1208 lq_sta->flush_timer = jiffies;1209 lq_sta->visited_columns = 0;1210}1211 1212static inline int rs_get_max_rate_from_mask(unsigned long rate_mask)1213{1214 if (rate_mask)1215 return find_last_bit(&rate_mask, BITS_PER_LONG);1216 return IWL_RATE_INVALID;1217}1218 1219static int rs_get_max_allowed_rate(struct iwl_lq_sta *lq_sta,1220 const struct rs_tx_column *column)1221{1222 switch (column->mode) {1223 case RS_LEGACY:1224 return lq_sta->max_legacy_rate_idx;1225 case RS_SISO:1226 return lq_sta->max_siso_rate_idx;1227 case RS_MIMO2:1228 return lq_sta->max_mimo2_rate_idx;1229 default:1230 WARN_ON_ONCE(1);1231 }1232 1233 return lq_sta->max_legacy_rate_idx;1234}1235 1236static const u16 *rs_get_expected_tpt_table(struct iwl_lq_sta *lq_sta,1237 const struct rs_tx_column *column,1238 u32 bw)1239{1240 /* Used to choose among HT tables */1241 const u16 (*ht_tbl_pointer)[IWL_RATE_COUNT];1242 1243 if (WARN_ON_ONCE(column->mode != RS_LEGACY &&1244 column->mode != RS_SISO &&1245 column->mode != RS_MIMO2))1246 return expected_tpt_legacy;1247 1248 /* Legacy rates have only one table */1249 if (column->mode == RS_LEGACY)1250 return expected_tpt_legacy;1251 1252 ht_tbl_pointer = expected_tpt_mimo2_20MHz;1253 /* Choose among many HT tables depending on number of streams1254 * (SISO/MIMO2), channel width (20/40/80), SGI, and aggregation1255 * status */1256 if (column->mode == RS_SISO) {1257 switch (bw) {1258 case RATE_MCS_CHAN_WIDTH_20:1259 ht_tbl_pointer = expected_tpt_siso_20MHz;1260 break;1261 case RATE_MCS_CHAN_WIDTH_40:1262 ht_tbl_pointer = expected_tpt_siso_40MHz;1263 break;1264 case RATE_MCS_CHAN_WIDTH_80:1265 ht_tbl_pointer = expected_tpt_siso_80MHz;1266 break;1267 case RATE_MCS_CHAN_WIDTH_160:1268 ht_tbl_pointer = expected_tpt_siso_160MHz;1269 break;1270 default:1271 WARN_ON_ONCE(1);1272 }1273 } else if (column->mode == RS_MIMO2) {1274 switch (bw) {1275 case RATE_MCS_CHAN_WIDTH_20:1276 ht_tbl_pointer = expected_tpt_mimo2_20MHz;1277 break;1278 case RATE_MCS_CHAN_WIDTH_40:1279 ht_tbl_pointer = expected_tpt_mimo2_40MHz;1280 break;1281 case RATE_MCS_CHAN_WIDTH_80:1282 ht_tbl_pointer = expected_tpt_mimo2_80MHz;1283 break;1284 case RATE_MCS_CHAN_WIDTH_160:1285 ht_tbl_pointer = expected_tpt_mimo2_160MHz;1286 break;1287 default:1288 WARN_ON_ONCE(1);1289 }1290 } else {1291 WARN_ON_ONCE(1);1292 }1293 1294 if (!column->sgi && !lq_sta->is_agg) /* Normal */1295 return ht_tbl_pointer[0];1296 else if (column->sgi && !lq_sta->is_agg) /* SGI */1297 return ht_tbl_pointer[1];1298 else if (!column->sgi && lq_sta->is_agg) /* AGG */1299 return ht_tbl_pointer[2];1300 else /* AGG+SGI */1301 return ht_tbl_pointer[3];1302}1303 1304static void rs_set_expected_tpt_table(struct iwl_lq_sta *lq_sta,1305 struct iwl_scale_tbl_info *tbl)1306{1307 struct rs_rate *rate = &tbl->rate;1308 const struct rs_tx_column *column = &rs_tx_columns[tbl->column];1309 1310 tbl->expected_tpt = rs_get_expected_tpt_table(lq_sta, column, rate->bw);1311}1312 1313/* rs uses two tables, one is active and the second is for searching better1314 * configuration. This function, according to the index of the currently1315 * active table returns the search table, which is located at the1316 * index complementary to 1 according to the active table (active = 1,1317 * search = 0 or active = 0, search = 1).1318 * Since lq_info is an arary of size 2, make sure index cannot be out of bounds.1319 */1320static inline u8 rs_search_tbl(u8 active_tbl)1321{1322 return (active_tbl ^ 1) & 1;1323}1324 1325static s32 rs_get_best_rate(struct iwl_mvm *mvm,1326 struct iwl_lq_sta *lq_sta,1327 struct iwl_scale_tbl_info *tbl, /* "search" */1328 unsigned long rate_mask, s8 index)1329{1330 struct iwl_scale_tbl_info *active_tbl =1331 &(lq_sta->lq_info[lq_sta->active_tbl]);1332 s32 success_ratio = active_tbl->win[index].success_ratio;1333 u16 expected_current_tpt = active_tbl->expected_tpt[index];1334 const u16 *tpt_tbl = tbl->expected_tpt;1335 u16 high_low;1336 u32 target_tpt;1337 int rate_idx;1338 1339 if (success_ratio >= RS_PERCENT(IWL_MVM_RS_SR_NO_DECREASE)) {1340 target_tpt = 100 * expected_current_tpt;1341 IWL_DEBUG_RATE(mvm,1342 "SR %d high. Find rate exceeding EXPECTED_CURRENT %d\n",1343 success_ratio, target_tpt);1344 } else {1345 target_tpt = lq_sta->last_tpt;1346 IWL_DEBUG_RATE(mvm,1347 "SR %d not that good. Find rate exceeding ACTUAL_TPT %d\n",1348 success_ratio, target_tpt);1349 }1350 1351 rate_idx = find_first_bit(&rate_mask, BITS_PER_LONG);1352 1353 while (rate_idx != IWL_RATE_INVALID) {1354 if (target_tpt < (100 * tpt_tbl[rate_idx]))1355 break;1356 1357 high_low = rs_get_adjacent_rate(mvm, rate_idx, rate_mask,1358 tbl->rate.type);1359 1360 rate_idx = (high_low >> 8) & 0xff;1361 }1362 1363 IWL_DEBUG_RATE(mvm, "Best rate found %d target_tp %d expected_new %d\n",1364 rate_idx, target_tpt,1365 rate_idx != IWL_RATE_INVALID ?1366 100 * tpt_tbl[rate_idx] : IWL_INVALID_VALUE);1367 1368 return rate_idx;1369}1370 1371static u32 rs_bw_from_sta_bw(struct ieee80211_sta *sta)1372{1373 struct ieee80211_sta_vht_cap *sta_vht_cap = &sta->deflink.vht_cap;1374 struct ieee80211_vht_cap vht_cap = {1375 .vht_cap_info = cpu_to_le32(sta_vht_cap->cap),1376 .supp_mcs = sta_vht_cap->vht_mcs,1377 };1378 1379 switch (sta->deflink.bandwidth) {1380 case IEEE80211_STA_RX_BW_160:1381 /*1382 * Don't use 160 MHz if VHT extended NSS support1383 * says we cannot use 2 streams, we don't want to1384 * deal with this.1385 * We only check MCS 0 - they will support that if1386 * we got here at all and we don't care which MCS,1387 * we want to determine a more global state.1388 */1389 if (ieee80211_get_vht_max_nss(&vht_cap,1390 IEEE80211_VHT_CHANWIDTH_160MHZ,1391 0, true,1392 sta->deflink.rx_nss) < sta->deflink.rx_nss)1393 return RATE_MCS_CHAN_WIDTH_80;1394 return RATE_MCS_CHAN_WIDTH_160;1395 case IEEE80211_STA_RX_BW_80:1396 return RATE_MCS_CHAN_WIDTH_80;1397 case IEEE80211_STA_RX_BW_40:1398 return RATE_MCS_CHAN_WIDTH_40;1399 case IEEE80211_STA_RX_BW_20:1400 default:1401 return RATE_MCS_CHAN_WIDTH_20;1402 }1403}1404 1405/*1406 * Check whether we should continue using same modulation mode, or1407 * begin search for a new mode, based on:1408 * 1) # tx successes or failures while using this mode1409 * 2) # times calling this function1410 * 3) elapsed time in this mode (not used, for now)1411 */1412static void rs_stay_in_table(struct iwl_lq_sta *lq_sta, bool force_search)1413{1414 struct iwl_scale_tbl_info *tbl;1415 int active_tbl;1416 int flush_interval_passed = 0;1417 struct iwl_mvm *mvm;1418 1419 mvm = lq_sta->pers.drv;1420 active_tbl = lq_sta->active_tbl;1421 1422 tbl = &(lq_sta->lq_info[active_tbl]);1423 1424 /* If we've been disallowing search, see if we should now allow it */1425 if (lq_sta->rs_state == RS_STATE_STAY_IN_COLUMN) {1426 /* Elapsed time using current modulation mode */1427 if (lq_sta->flush_timer)1428 flush_interval_passed =1429 time_after(jiffies,1430 (unsigned long)(lq_sta->flush_timer +1431 (IWL_MVM_RS_STAY_IN_COLUMN_TIMEOUT * HZ)));1432 1433 /*1434 * Check if we should allow search for new modulation mode.1435 * If many frames have failed or succeeded, or we've used1436 * this same modulation for a long time, allow search, and1437 * reset history stats that keep track of whether we should1438 * allow a new search. Also (below) reset all bitmaps and1439 * stats in active history.1440 */1441 if (force_search ||1442 (lq_sta->total_failed > lq_sta->max_failure_limit) ||1443 (lq_sta->total_success > lq_sta->max_success_limit) ||1444 ((!lq_sta->search_better_tbl) &&1445 (lq_sta->flush_timer) && (flush_interval_passed))) {1446 IWL_DEBUG_RATE(mvm,1447 "LQ: stay is expired %d %d %d\n",1448 lq_sta->total_failed,1449 lq_sta->total_success,1450 flush_interval_passed);1451 1452 /* Allow search for new mode */1453 lq_sta->rs_state = RS_STATE_SEARCH_CYCLE_STARTED;1454 IWL_DEBUG_RATE(mvm,1455 "Moving to RS_STATE_SEARCH_CYCLE_STARTED\n");1456 lq_sta->total_failed = 0;1457 lq_sta->total_success = 0;1458 lq_sta->flush_timer = 0;1459 /* mark the current column as visited */1460 lq_sta->visited_columns = BIT(tbl->column);1461 /*1462 * Else if we've used this modulation mode enough repetitions1463 * (regardless of elapsed time or success/failure), reset1464 * history bitmaps and rate-specific stats for all rates in1465 * active table.1466 */1467 } else {1468 lq_sta->table_count++;1469 if (lq_sta->table_count >=1470 lq_sta->table_count_limit) {1471 lq_sta->table_count = 0;1472 1473 IWL_DEBUG_RATE(mvm,1474 "LQ: stay in table clear win\n");1475 rs_rate_scale_clear_tbl_windows(mvm, tbl);1476 }1477 }1478 1479 /* If transitioning to allow "search", reset all history1480 * bitmaps and stats in active table (this will become the new1481 * "search" table). */1482 if (lq_sta->rs_state == RS_STATE_SEARCH_CYCLE_STARTED) {1483 rs_rate_scale_clear_tbl_windows(mvm, tbl);1484 }1485 }1486}1487 1488static void rs_set_amsdu_len(struct iwl_mvm *mvm, struct ieee80211_sta *sta,1489 struct iwl_scale_tbl_info *tbl,1490 enum rs_action scale_action)1491{1492 struct iwl_mvm_sta *mvmsta = iwl_mvm_sta_from_mac80211(sta);1493 struct ieee80211_bss_conf *bss_conf = &mvmsta->vif->bss_conf;1494 int i;1495 1496 sta->deflink.agg.max_amsdu_len =1497 rs_fw_get_max_amsdu_len(sta, bss_conf, &sta->deflink);1498 1499 /*1500 * In case TLC offload is not active amsdu_enabled is either 0xFFFF1501 * or 0, since there is no per-TID alg.1502 */1503 if ((!is_vht(&tbl->rate) && !is_ht(&tbl->rate)) ||1504 tbl->rate.index < IWL_RATE_MCS_5_INDEX ||1505 scale_action == RS_ACTION_DOWNSCALE)1506 mvmsta->amsdu_enabled = 0;1507 else1508 mvmsta->amsdu_enabled = 0xFFFF;1509 1510 if (bss_conf->he_support &&1511 !iwlwifi_mod_params.disable_11ax)1512 mvmsta->max_amsdu_len = sta->deflink.agg.max_amsdu_len;1513 else1514 mvmsta->max_amsdu_len =1515 min_t(int, sta->deflink.agg.max_amsdu_len, 8500);1516 1517 sta->deflink.agg.max_rc_amsdu_len = mvmsta->max_amsdu_len;1518 1519 for (i = 0; i < IWL_MAX_TID_COUNT; i++) {1520 if (mvmsta->amsdu_enabled)1521 sta->deflink.agg.max_tid_amsdu_len[i] =1522 iwl_mvm_max_amsdu_size(mvm, sta, i);1523 else1524 /*1525 * Not so elegant, but this will effectively1526 * prevent AMSDU on this TID1527 */1528 sta->deflink.agg.max_tid_amsdu_len[i] = 1;1529 }1530}1531 1532/*1533 * setup rate table in uCode1534 */1535static void rs_update_rate_tbl(struct iwl_mvm *mvm,1536 struct ieee80211_sta *sta,1537 struct iwl_lq_sta *lq_sta,1538 struct iwl_scale_tbl_info *tbl)1539{1540 rs_fill_lq_cmd(mvm, sta, lq_sta, &tbl->rate);1541 iwl_mvm_send_lq_cmd(mvm, &lq_sta->lq);1542}1543 1544static bool rs_tweak_rate_tbl(struct iwl_mvm *mvm,1545 struct ieee80211_sta *sta,1546 struct iwl_lq_sta *lq_sta,1547 struct iwl_scale_tbl_info *tbl,1548 enum rs_action scale_action)1549{1550 if (rs_bw_from_sta_bw(sta) != RATE_MCS_CHAN_WIDTH_80)1551 return false;1552 1553 if (!is_vht_siso(&tbl->rate))1554 return false;1555 1556 if ((tbl->rate.bw == RATE_MCS_CHAN_WIDTH_80) &&1557 (tbl->rate.index == IWL_RATE_MCS_0_INDEX) &&1558 (scale_action == RS_ACTION_DOWNSCALE)) {1559 tbl->rate.bw = RATE_MCS_CHAN_WIDTH_20;1560 tbl->rate.index = IWL_RATE_MCS_4_INDEX;1561 IWL_DEBUG_RATE(mvm, "Switch 80Mhz SISO MCS0 -> 20Mhz MCS4\n");1562 goto tweaked;1563 }1564 1565 /* Go back to 80Mhz MCS1 only if we've established that 20Mhz MCS5 is1566 * sustainable, i.e. we're past the test window. We can't go back1567 * if MCS5 is just tested as this will happen always after switching1568 * to 20Mhz MCS4 because the rate stats are cleared.1569 */1570 if ((tbl->rate.bw == RATE_MCS_CHAN_WIDTH_20) &&1571 (((tbl->rate.index == IWL_RATE_MCS_5_INDEX) &&1572 (scale_action == RS_ACTION_STAY)) ||1573 ((tbl->rate.index > IWL_RATE_MCS_5_INDEX) &&1574 (scale_action == RS_ACTION_UPSCALE)))) {1575 tbl->rate.bw = RATE_MCS_CHAN_WIDTH_80;1576 tbl->rate.index = IWL_RATE_MCS_1_INDEX;1577 IWL_DEBUG_RATE(mvm, "Switch 20Mhz SISO MCS5 -> 80Mhz MCS1\n");1578 goto tweaked;1579 }1580 1581 return false;1582 1583tweaked:1584 rs_set_expected_tpt_table(lq_sta, tbl);1585 rs_rate_scale_clear_tbl_windows(mvm, tbl);1586 return true;1587}1588 1589static enum rs_column rs_get_next_column(struct iwl_mvm *mvm,1590 struct iwl_lq_sta *lq_sta,1591 struct ieee80211_sta *sta,1592 struct iwl_scale_tbl_info *tbl)1593{1594 int i, j, max_rate;1595 enum rs_column next_col_id;1596 const struct rs_tx_column *curr_col = &rs_tx_columns[tbl->column];1597 const struct rs_tx_column *next_col;1598 allow_column_func_t allow_func;1599 u8 valid_ants = iwl_mvm_get_valid_tx_ant(mvm);1600 const u16 *expected_tpt_tbl;1601 u16 tpt, max_expected_tpt;1602 1603 for (i = 0; i < MAX_NEXT_COLUMNS; i++) {1604 next_col_id = curr_col->next_columns[i];1605 1606 if (next_col_id == RS_COLUMN_INVALID)1607 continue;1608 1609 if (lq_sta->visited_columns & BIT(next_col_id)) {1610 IWL_DEBUG_RATE(mvm, "Skip already visited column %d\n",1611 next_col_id);1612 continue;1613 }1614 1615 next_col = &rs_tx_columns[next_col_id];1616 1617 if (!rs_is_valid_ant(valid_ants, next_col->ant)) {1618 IWL_DEBUG_RATE(mvm,1619 "Skip column %d as ANT config isn't supported by chip. valid_ants 0x%x column ant 0x%x\n",1620 next_col_id, valid_ants, next_col->ant);1621 continue;1622 }1623 1624 for (j = 0; j < MAX_COLUMN_CHECKS; j++) {1625 allow_func = next_col->checks[j];1626 if (allow_func && !allow_func(mvm, sta, &tbl->rate,1627 next_col))1628 break;1629 }1630 1631 if (j != MAX_COLUMN_CHECKS) {1632 IWL_DEBUG_RATE(mvm,1633 "Skip column %d: not allowed (check %d failed)\n",1634 next_col_id, j);1635 1636 continue;1637 }1638 1639 tpt = lq_sta->last_tpt / 100;1640 expected_tpt_tbl = rs_get_expected_tpt_table(lq_sta, next_col,1641 rs_bw_from_sta_bw(sta));1642 if (WARN_ON_ONCE(!expected_tpt_tbl))1643 continue;1644 1645 max_rate = rs_get_max_allowed_rate(lq_sta, next_col);1646 if (max_rate == IWL_RATE_INVALID) {1647 IWL_DEBUG_RATE(mvm,1648 "Skip column %d: no rate is allowed in this column\n",1649 next_col_id);1650 continue;1651 }1652 1653 max_expected_tpt = expected_tpt_tbl[max_rate];1654 if (tpt >= max_expected_tpt) {1655 IWL_DEBUG_RATE(mvm,1656 "Skip column %d: can't beat current TPT. Max expected %d current %d\n",1657 next_col_id, max_expected_tpt, tpt);1658 continue;1659 }1660 1661 IWL_DEBUG_RATE(mvm,1662 "Found potential column %d. Max expected %d current %d\n",1663 next_col_id, max_expected_tpt, tpt);1664 break;1665 }1666 1667 if (i == MAX_NEXT_COLUMNS)1668 return RS_COLUMN_INVALID;1669 1670 return next_col_id;1671}1672 1673static int rs_switch_to_column(struct iwl_mvm *mvm,1674 struct iwl_lq_sta *lq_sta,1675 struct ieee80211_sta *sta,1676 enum rs_column col_id)1677{1678 struct iwl_scale_tbl_info *tbl = &lq_sta->lq_info[lq_sta->active_tbl];1679 struct iwl_scale_tbl_info *search_tbl =1680 &lq_sta->lq_info[rs_search_tbl(lq_sta->active_tbl)];1681 struct rs_rate *rate = &search_tbl->rate;1682 const struct rs_tx_column *column = &rs_tx_columns[col_id];1683 const struct rs_tx_column *curr_column = &rs_tx_columns[tbl->column];1684 unsigned long rate_mask = 0;1685 u32 rate_idx = 0;1686 1687 memcpy(search_tbl, tbl, offsetof(struct iwl_scale_tbl_info, win));1688 1689 rate->sgi = column->sgi;1690 rate->ant = column->ant;1691 1692 if (column->mode == RS_LEGACY) {1693 if (lq_sta->band == NL80211_BAND_5GHZ)1694 rate->type = LQ_LEGACY_A;1695 else1696 rate->type = LQ_LEGACY_G;1697 1698 rate->bw = RATE_MCS_CHAN_WIDTH_20;1699 rate->ldpc = false;1700 rate_mask = lq_sta->active_legacy_rate;1701 } else if (column->mode == RS_SISO) {1702 rate->type = lq_sta->is_vht ? LQ_VHT_SISO : LQ_HT_SISO;1703 rate_mask = lq_sta->active_siso_rate;1704 } else if (column->mode == RS_MIMO2) {1705 rate->type = lq_sta->is_vht ? LQ_VHT_MIMO2 : LQ_HT_MIMO2;1706 rate_mask = lq_sta->active_mimo2_rate;1707 } else {1708 WARN_ONCE(1, "Bad column mode");1709 }1710 1711 if (column->mode != RS_LEGACY) {1712 rate->bw = rs_bw_from_sta_bw(sta);1713 rate->ldpc = lq_sta->ldpc;1714 }1715 1716 search_tbl->column = col_id;1717 rs_set_expected_tpt_table(lq_sta, search_tbl);1718 1719 lq_sta->visited_columns |= BIT(col_id);1720 1721 /* Get the best matching rate if we're changing modes. e.g.1722 * SISO->MIMO, LEGACY->SISO, MIMO->SISO1723 */1724 if (curr_column->mode != column->mode) {1725 rate_idx = rs_get_best_rate(mvm, lq_sta, search_tbl,1726 rate_mask, rate->index);1727 1728 if ((rate_idx == IWL_RATE_INVALID) ||1729 !(BIT(rate_idx) & rate_mask)) {1730 IWL_DEBUG_RATE(mvm,1731 "can not switch with index %d"1732 " rate mask %lx\n",1733 rate_idx, rate_mask);1734 1735 goto err;1736 }1737 1738 rate->index = rate_idx;1739 }1740 1741 IWL_DEBUG_RATE(mvm, "Switched to column %d: Index %d\n",1742 col_id, rate->index);1743 1744 return 0;1745 1746err:1747 rate->type = LQ_NONE;1748 return -1;1749}1750 1751static enum rs_action rs_get_rate_action(struct iwl_mvm *mvm,1752 struct iwl_scale_tbl_info *tbl,1753 s32 sr, int low, int high,1754 int current_tpt,1755 int low_tpt, int high_tpt)1756{1757 enum rs_action action = RS_ACTION_STAY;1758 1759 if ((sr <= RS_PERCENT(IWL_MVM_RS_SR_FORCE_DECREASE)) ||1760 (current_tpt == 0)) {1761 IWL_DEBUG_RATE(mvm,1762 "Decrease rate because of low SR\n");1763 return RS_ACTION_DOWNSCALE;1764 }1765 1766 if ((low_tpt == IWL_INVALID_VALUE) &&1767 (high_tpt == IWL_INVALID_VALUE) &&1768 (high != IWL_RATE_INVALID)) {1769 IWL_DEBUG_RATE(mvm,1770 "No data about high/low rates. Increase rate\n");1771 return RS_ACTION_UPSCALE;1772 }1773 1774 if ((high_tpt == IWL_INVALID_VALUE) &&1775 (high != IWL_RATE_INVALID) &&1776 (low_tpt != IWL_INVALID_VALUE) &&1777 (low_tpt < current_tpt)) {1778 IWL_DEBUG_RATE(mvm,1779 "No data about high rate and low rate is worse. Increase rate\n");1780 return RS_ACTION_UPSCALE;1781 }1782 1783 if ((high_tpt != IWL_INVALID_VALUE) &&1784 (high_tpt > current_tpt)) {1785 IWL_DEBUG_RATE(mvm,1786 "Higher rate is better. Increate rate\n");1787 return RS_ACTION_UPSCALE;1788 }1789 1790 if ((low_tpt != IWL_INVALID_VALUE) &&1791 (high_tpt != IWL_INVALID_VALUE) &&1792 (low_tpt < current_tpt) &&1793 (high_tpt < current_tpt)) {1794 IWL_DEBUG_RATE(mvm,1795 "Both high and low are worse. Maintain rate\n");1796 return RS_ACTION_STAY;1797 }1798 1799 if ((low_tpt != IWL_INVALID_VALUE) &&1800 (low_tpt > current_tpt)) {1801 IWL_DEBUG_RATE(mvm,1802 "Lower rate is better\n");1803 action = RS_ACTION_DOWNSCALE;1804 goto out;1805 }1806 1807 if ((low_tpt == IWL_INVALID_VALUE) &&1808 (low != IWL_RATE_INVALID)) {1809 IWL_DEBUG_RATE(mvm,1810 "No data about lower rate\n");1811 action = RS_ACTION_DOWNSCALE;1812 goto out;1813 }1814 1815 IWL_DEBUG_RATE(mvm, "Maintain rate\n");1816 1817out:1818 if ((action == RS_ACTION_DOWNSCALE) && (low != IWL_RATE_INVALID)) {1819 if (sr >= RS_PERCENT(IWL_MVM_RS_SR_NO_DECREASE)) {1820 IWL_DEBUG_RATE(mvm,1821 "SR is above NO DECREASE. Avoid downscale\n");1822 action = RS_ACTION_STAY;1823 } else if (current_tpt > (100 * tbl->expected_tpt[low])) {1824 IWL_DEBUG_RATE(mvm,1825 "Current TPT is higher than max expected in low rate. Avoid downscale\n");1826 action = RS_ACTION_STAY;1827 } else {1828 IWL_DEBUG_RATE(mvm, "Decrease rate\n");1829 }1830 }1831 1832 return action;1833}1834 1835static bool rs_stbc_allow(struct iwl_mvm *mvm, struct ieee80211_sta *sta,1836 struct iwl_lq_sta *lq_sta)1837{1838 /* Our chip supports Tx STBC and the peer is an HT/VHT STA which1839 * supports STBC of at least 1*SS1840 */1841 if (!lq_sta->stbc_capable)1842 return false;1843 1844 if (!iwl_mvm_bt_coex_is_mimo_allowed(mvm, sta))1845 return false;1846 1847 return true;1848}1849 1850static void rs_get_adjacent_txp(struct iwl_mvm *mvm, int index,1851 int *weaker, int *stronger)1852{1853 *weaker = index + IWL_MVM_RS_TPC_TX_POWER_STEP;1854 if (*weaker > TPC_MAX_REDUCTION)1855 *weaker = TPC_INVALID;1856 1857 *stronger = index - IWL_MVM_RS_TPC_TX_POWER_STEP;1858 if (*stronger < 0)1859 *stronger = TPC_INVALID;1860}1861 1862static bool rs_tpc_allowed(struct iwl_mvm *mvm, struct ieee80211_vif *vif,1863 struct rs_rate *rate, enum nl80211_band band)1864{1865 int index = rate->index;1866 bool cam = (iwlmvm_mod_params.power_scheme == IWL_POWER_SCHEME_CAM);1867 bool sta_ps_disabled = (vif->type == NL80211_IFTYPE_STATION &&1868 !vif->cfg.ps);1869 1870 IWL_DEBUG_RATE(mvm, "cam: %d sta_ps_disabled %d\n",1871 cam, sta_ps_disabled);1872 /*1873 * allow tpc only if power management is enabled, or bt coex1874 * activity grade allows it and we are on 2.4Ghz.1875 */1876 if ((cam || sta_ps_disabled) &&1877 !iwl_mvm_bt_coex_is_tpc_allowed(mvm, band))1878 return false;1879 1880 IWL_DEBUG_RATE(mvm, "check rate, table type: %d\n", rate->type);1881 if (is_legacy(rate))1882 return index == IWL_RATE_54M_INDEX;1883 if (is_ht(rate))1884 return index == IWL_RATE_MCS_7_INDEX;1885 if (is_vht(rate))1886 return index == IWL_RATE_MCS_9_INDEX;1887 1888 WARN_ON_ONCE(1);1889 return false;1890}1891 1892enum tpc_action {1893 TPC_ACTION_STAY,1894 TPC_ACTION_DECREASE,1895 TPC_ACTION_INCREASE,1896 TPC_ACTION_NO_RESTIRCTION,1897};1898 1899static enum tpc_action rs_get_tpc_action(struct iwl_mvm *mvm,1900 s32 sr, int weak, int strong,1901 int current_tpt,1902 int weak_tpt, int strong_tpt)1903{1904 /* stay until we have valid tpt */1905 if (current_tpt == IWL_INVALID_VALUE) {1906 IWL_DEBUG_RATE(mvm, "no current tpt. stay.\n");1907 return TPC_ACTION_STAY;1908 }1909 1910 /* Too many failures, increase txp */1911 if (sr <= RS_PERCENT(IWL_MVM_RS_TPC_SR_FORCE_INCREASE) ||1912 current_tpt == 0) {1913 IWL_DEBUG_RATE(mvm, "increase txp because of weak SR\n");1914 return TPC_ACTION_NO_RESTIRCTION;1915 }1916 1917 /* try decreasing first if applicable */1918 if (sr >= RS_PERCENT(IWL_MVM_RS_TPC_SR_NO_INCREASE) &&1919 weak != TPC_INVALID) {1920 if (weak_tpt == IWL_INVALID_VALUE &&1921 (strong_tpt == IWL_INVALID_VALUE ||1922 current_tpt >= strong_tpt)) {1923 IWL_DEBUG_RATE(mvm,1924 "no weak txp measurement. decrease txp\n");1925 return TPC_ACTION_DECREASE;1926 }1927 1928 if (weak_tpt > current_tpt) {1929 IWL_DEBUG_RATE(mvm,1930 "lower txp has better tpt. decrease txp\n");1931 return TPC_ACTION_DECREASE;1932 }1933 }1934 1935 /* next, increase if needed */1936 if (sr < RS_PERCENT(IWL_MVM_RS_TPC_SR_NO_INCREASE) &&1937 strong != TPC_INVALID) {1938 if (weak_tpt == IWL_INVALID_VALUE &&1939 strong_tpt != IWL_INVALID_VALUE &&1940 current_tpt < strong_tpt) {1941 IWL_DEBUG_RATE(mvm,1942 "higher txp has better tpt. increase txp\n");1943 return TPC_ACTION_INCREASE;1944 }1945 1946 if (weak_tpt < current_tpt &&1947 (strong_tpt == IWL_INVALID_VALUE ||1948 strong_tpt > current_tpt)) {1949 IWL_DEBUG_RATE(mvm,1950 "lower txp has worse tpt. increase txp\n");1951 return TPC_ACTION_INCREASE;1952 }1953 }1954 1955 IWL_DEBUG_RATE(mvm, "no need to increase or decrease txp - stay\n");1956 return TPC_ACTION_STAY;1957}1958 1959static bool rs_tpc_perform(struct iwl_mvm *mvm,1960 struct ieee80211_sta *sta,1961 struct iwl_lq_sta *lq_sta,1962 struct iwl_scale_tbl_info *tbl)1963{1964 struct iwl_mvm_sta *mvm_sta = iwl_mvm_sta_from_mac80211(sta);1965 struct ieee80211_vif *vif = mvm_sta->vif;1966 struct ieee80211_chanctx_conf *chanctx_conf;1967 enum nl80211_band band;1968 struct iwl_rate_scale_data *window;1969 struct rs_rate *rate = &tbl->rate;1970 enum tpc_action action;1971 s32 sr;1972 u8 cur = lq_sta->lq.reduced_tpc;1973 int current_tpt;1974 int weak, strong;1975 int weak_tpt = IWL_INVALID_VALUE, strong_tpt = IWL_INVALID_VALUE;1976 1977#ifdef CONFIG_MAC80211_DEBUGFS1978 if (lq_sta->pers.dbg_fixed_txp_reduction <= TPC_MAX_REDUCTION) {1979 IWL_DEBUG_RATE(mvm, "fixed tpc: %d\n",1980 lq_sta->pers.dbg_fixed_txp_reduction);1981 lq_sta->lq.reduced_tpc = lq_sta->pers.dbg_fixed_txp_reduction;1982 return cur != lq_sta->pers.dbg_fixed_txp_reduction;1983 }1984#endif1985 1986 rcu_read_lock();1987 chanctx_conf = rcu_dereference(vif->bss_conf.chanctx_conf);1988 if (WARN_ON(!chanctx_conf))1989 band = NUM_NL80211_BANDS;1990 else1991 band = chanctx_conf->def.chan->band;1992 rcu_read_unlock();1993 1994 if (!rs_tpc_allowed(mvm, vif, rate, band)) {1995 IWL_DEBUG_RATE(mvm,1996 "tpc is not allowed. remove txp restrictions\n");1997 lq_sta->lq.reduced_tpc = TPC_NO_REDUCTION;1998 return cur != TPC_NO_REDUCTION;1999 }2000 2001 rs_get_adjacent_txp(mvm, cur, &weak, &strong);2002 2003 /* Collect measured throughputs for current and adjacent rates */2004 window = tbl->tpc_win;2005 sr = window[cur].success_ratio;2006 current_tpt = window[cur].average_tpt;2007 if (weak != TPC_INVALID)2008 weak_tpt = window[weak].average_tpt;2009 if (strong != TPC_INVALID)2010 strong_tpt = window[strong].average_tpt;2011 2012 IWL_DEBUG_RATE(mvm,2013 "(TPC: %d): cur_tpt %d SR %d weak %d strong %d weak_tpt %d strong_tpt %d\n",2014 cur, current_tpt, sr, weak, strong,2015 weak_tpt, strong_tpt);2016 2017 action = rs_get_tpc_action(mvm, sr, weak, strong,2018 current_tpt, weak_tpt, strong_tpt);2019 2020 /* override actions if we are on the edge */2021 if (weak == TPC_INVALID && action == TPC_ACTION_DECREASE) {2022 IWL_DEBUG_RATE(mvm, "already in lowest txp, stay\n");2023 action = TPC_ACTION_STAY;2024 } else if (strong == TPC_INVALID &&2025 (action == TPC_ACTION_INCREASE ||2026 action == TPC_ACTION_NO_RESTIRCTION)) {2027 IWL_DEBUG_RATE(mvm, "already in highest txp, stay\n");2028 action = TPC_ACTION_STAY;2029 }2030 2031 switch (action) {2032 case TPC_ACTION_DECREASE:2033 lq_sta->lq.reduced_tpc = weak;2034 return true;2035 case TPC_ACTION_INCREASE:2036 lq_sta->lq.reduced_tpc = strong;2037 return true;2038 case TPC_ACTION_NO_RESTIRCTION:2039 lq_sta->lq.reduced_tpc = TPC_NO_REDUCTION;2040 return true;2041 case TPC_ACTION_STAY:2042 /* do nothing */2043 break;2044 }2045 return false;2046}2047 2048/*2049 * Do rate scaling and search for new modulation mode.2050 */2051static void rs_rate_scale_perform(struct iwl_mvm *mvm,2052 struct ieee80211_sta *sta,2053 struct iwl_lq_sta *lq_sta,2054 int tid, bool ndp)2055{2056 int low = IWL_RATE_INVALID;2057 int high = IWL_RATE_INVALID;2058 int index;2059 struct iwl_rate_scale_data *window = NULL;2060 int current_tpt = IWL_INVALID_VALUE;2061 int low_tpt = IWL_INVALID_VALUE;2062 int high_tpt = IWL_INVALID_VALUE;2063 u32 fail_count;2064 enum rs_action scale_action = RS_ACTION_STAY;2065 u16 rate_mask;2066 u8 update_lq = 0;2067 struct iwl_scale_tbl_info *tbl, *tbl1;2068 u8 active_tbl = 0;2069 u8 done_search = 0;2070 u16 high_low;2071 s32 sr;2072 u8 prev_agg = lq_sta->is_agg;2073 struct iwl_mvm_sta *mvmsta = iwl_mvm_sta_from_mac80211(sta);2074 struct rs_rate *rate;2075 2076 lq_sta->is_agg = !!mvmsta->agg_tids;2077 2078 /*2079 * Select rate-scale / modulation-mode table to work with in2080 * the rest of this function: "search" if searching for better2081 * modulation mode, or "active" if doing rate scaling within a mode.2082 */2083 if (!lq_sta->search_better_tbl)2084 active_tbl = lq_sta->active_tbl;2085 else2086 active_tbl = rs_search_tbl(lq_sta->active_tbl);2087 2088 tbl = &(lq_sta->lq_info[active_tbl]);2089 rate = &tbl->rate;2090 2091 if (prev_agg != lq_sta->is_agg) {2092 IWL_DEBUG_RATE(mvm,2093 "Aggregation changed: prev %d current %d. Update expected TPT table\n",2094 prev_agg, lq_sta->is_agg);2095 rs_set_expected_tpt_table(lq_sta, tbl);2096 rs_rate_scale_clear_tbl_windows(mvm, tbl);2097 }2098 2099 /* current tx rate */2100 index = rate->index;2101 2102 /* rates available for this association, and for modulation mode */2103 rate_mask = rs_get_supported_rates(lq_sta, rate);2104 2105 if (!(BIT(index) & rate_mask)) {2106 IWL_ERR(mvm, "Current Rate is not valid\n");2107 if (lq_sta->search_better_tbl) {2108 /* revert to active table if search table is not valid*/2109 rate->type = LQ_NONE;2110 lq_sta->search_better_tbl = 0;2111 tbl = &(lq_sta->lq_info[lq_sta->active_tbl]);2112 rs_update_rate_tbl(mvm, sta, lq_sta, tbl);2113 }2114 return;2115 }2116 2117 /* Get expected throughput table and history window for current rate */2118 if (!tbl->expected_tpt) {2119 IWL_ERR(mvm, "tbl->expected_tpt is NULL\n");2120 return;2121 }2122 2123 /* TODO: handle rate_idx_mask and rate_idx_mcs_mask */2124 window = &(tbl->win[index]);2125 2126 /*2127 * If there is not enough history to calculate actual average2128 * throughput, keep analyzing results of more tx frames, without2129 * changing rate or mode (bypass most of the rest of this function).2130 * Set up new rate table in uCode only if old rate is not supported2131 * in current association (use new rate found above).2132 */2133 fail_count = window->counter - window->success_counter;2134 if ((fail_count < IWL_MVM_RS_RATE_MIN_FAILURE_TH) &&2135 (window->success_counter < IWL_MVM_RS_RATE_MIN_SUCCESS_TH)) {2136 IWL_DEBUG_RATE(mvm,2137 "%s: Test Window: succ %d total %d\n",2138 rs_pretty_rate(rate),2139 window->success_counter, window->counter);2140 2141 /* Can't calculate this yet; not enough history */2142 window->average_tpt = IWL_INVALID_VALUE;2143 2144 /* Should we stay with this modulation mode,2145 * or search for a new one? */2146 rs_stay_in_table(lq_sta, false);2147 2148 return;2149 }2150 2151 /* If we are searching for better modulation mode, check success. */2152 if (lq_sta->search_better_tbl) {2153 /* If good success, continue using the "search" mode;2154 * no need to send new link quality command, since we're2155 * continuing to use the setup that we've been trying. */2156 if (window->average_tpt > lq_sta->last_tpt) {2157 IWL_DEBUG_RATE(mvm,2158 "SWITCHING TO NEW TABLE SR: %d "2159 "cur-tpt %d old-tpt %d\n",2160 window->success_ratio,2161 window->average_tpt,2162 lq_sta->last_tpt);2163 2164 /* Swap tables; "search" becomes "active" */2165 lq_sta->active_tbl = active_tbl;2166 current_tpt = window->average_tpt;2167 /* Else poor success; go back to mode in "active" table */2168 } else {2169 IWL_DEBUG_RATE(mvm,2170 "GOING BACK TO THE OLD TABLE: SR %d "2171 "cur-tpt %d old-tpt %d\n",2172 window->success_ratio,2173 window->average_tpt,2174 lq_sta->last_tpt);2175 2176 /* Nullify "search" table */2177 rate->type = LQ_NONE;2178 2179 /* Revert to "active" table */2180 active_tbl = lq_sta->active_tbl;2181 tbl = &(lq_sta->lq_info[active_tbl]);2182 2183 /* Revert to "active" rate and throughput info */2184 index = tbl->rate.index;2185 current_tpt = lq_sta->last_tpt;2186 2187 /* Need to set up a new rate table in uCode */2188 update_lq = 1;2189 }2190 2191 /* Either way, we've made a decision; modulation mode2192 * search is done, allow rate adjustment next time. */2193 lq_sta->search_better_tbl = 0;2194 done_search = 1; /* Don't switch modes below! */2195 goto lq_update;2196 }2197 2198 /* (Else) not in search of better modulation mode, try for better2199 * starting rate, while staying in this mode. */2200 high_low = rs_get_adjacent_rate(mvm, index, rate_mask, rate->type);2201 low = high_low & 0xff;2202 high = (high_low >> 8) & 0xff;2203 2204 /* TODO: handle rate_idx_mask and rate_idx_mcs_mask */2205 2206 sr = window->success_ratio;2207 2208 /* Collect measured throughputs for current and adjacent rates */2209 current_tpt = window->average_tpt;2210 if (low != IWL_RATE_INVALID)2211 low_tpt = tbl->win[low].average_tpt;2212 if (high != IWL_RATE_INVALID)2213 high_tpt = tbl->win[high].average_tpt;2214 2215 IWL_DEBUG_RATE(mvm,2216 "%s: cur_tpt %d SR %d low %d high %d low_tpt %d high_tpt %d\n",2217 rs_pretty_rate(rate), current_tpt, sr,2218 low, high, low_tpt, high_tpt);2219 2220 scale_action = rs_get_rate_action(mvm, tbl, sr, low, high,2221 current_tpt, low_tpt, high_tpt);2222 2223 /* Force a search in case BT doesn't like us being in MIMO */2224 if (is_mimo(rate) &&2225 !iwl_mvm_bt_coex_is_mimo_allowed(mvm, sta)) {2226 IWL_DEBUG_RATE(mvm,2227 "BT Coex forbids MIMO. Search for new config\n");2228 rs_stay_in_table(lq_sta, true);2229 goto lq_update;2230 }2231 2232 switch (scale_action) {2233 case RS_ACTION_DOWNSCALE:2234 /* Decrease starting rate, update uCode's rate table */2235 if (low != IWL_RATE_INVALID) {2236 update_lq = 1;2237 index = low;2238 } else {2239 IWL_DEBUG_RATE(mvm,2240 "At the bottom rate. Can't decrease\n");2241 }2242 2243 break;2244 case RS_ACTION_UPSCALE:2245 /* Increase starting rate, update uCode's rate table */2246 if (high != IWL_RATE_INVALID) {2247 update_lq = 1;2248 index = high;2249 } else {2250 IWL_DEBUG_RATE(mvm,2251 "At the top rate. Can't increase\n");2252 }2253 2254 break;2255 case RS_ACTION_STAY:2256 /* No change */2257 if (lq_sta->rs_state == RS_STATE_STAY_IN_COLUMN)2258 update_lq = rs_tpc_perform(mvm, sta, lq_sta, tbl);2259 break;2260 default:2261 break;2262 }2263 2264lq_update:2265 /* Replace uCode's rate table for the destination station. */2266 if (update_lq) {2267 tbl->rate.index = index;2268 if (IWL_MVM_RS_80_20_FAR_RANGE_TWEAK)2269 rs_tweak_rate_tbl(mvm, sta, lq_sta, tbl, scale_action);2270 rs_set_amsdu_len(mvm, sta, tbl, scale_action);2271 rs_update_rate_tbl(mvm, sta, lq_sta, tbl);2272 }2273 2274 rs_stay_in_table(lq_sta, false);2275 2276 /*2277 * Search for new modulation mode if we're:2278 * 1) Not changing rates right now2279 * 2) Not just finishing up a search2280 * 3) Allowing a new search2281 */2282 if (!update_lq && !done_search &&2283 lq_sta->rs_state == RS_STATE_SEARCH_CYCLE_STARTED2284 && window->counter) {2285 enum rs_column next_column;2286 2287 /* Save current throughput to compare with "search" throughput*/2288 lq_sta->last_tpt = current_tpt;2289 2290 IWL_DEBUG_RATE(mvm,2291 "Start Search: update_lq %d done_search %d rs_state %d win->counter %d\n",2292 update_lq, done_search, lq_sta->rs_state,2293 window->counter);2294 2295 next_column = rs_get_next_column(mvm, lq_sta, sta, tbl);2296 if (next_column != RS_COLUMN_INVALID) {2297 int ret = rs_switch_to_column(mvm, lq_sta, sta,2298 next_column);2299 if (!ret)2300 lq_sta->search_better_tbl = 1;2301 } else {2302 IWL_DEBUG_RATE(mvm,2303 "No more columns to explore in search cycle. Go to RS_STATE_SEARCH_CYCLE_ENDED\n");2304 lq_sta->rs_state = RS_STATE_SEARCH_CYCLE_ENDED;2305 }2306 2307 /* If new "search" mode was selected, set up in uCode table */2308 if (lq_sta->search_better_tbl) {2309 /* Access the "search" table, clear its history. */2310 tbl = &lq_sta->lq_info[rs_search_tbl(lq_sta->active_tbl)];2311 rs_rate_scale_clear_tbl_windows(mvm, tbl);2312 2313 /* Use new "search" start rate */2314 index = tbl->rate.index;2315 2316 rs_dump_rate(mvm, &tbl->rate,2317 "Switch to SEARCH TABLE:");2318 rs_update_rate_tbl(mvm, sta, lq_sta, tbl);2319 } else {2320 done_search = 1;2321 }2322 }2323 2324 if (!ndp)2325 rs_tl_turn_on_agg(mvm, mvmsta, tid, lq_sta, sta);2326 2327 if (done_search && lq_sta->rs_state == RS_STATE_SEARCH_CYCLE_ENDED) {2328 tbl1 = &(lq_sta->lq_info[lq_sta->active_tbl]);2329 rs_set_stay_in_table(mvm, is_legacy(&tbl1->rate), lq_sta);2330 }2331}2332 2333struct rs_init_rate_info {2334 s8 rssi;2335 u8 rate_idx;2336};2337 2338static const struct rs_init_rate_info rs_optimal_rates_24ghz_legacy[] = {2339 { -60, IWL_RATE_54M_INDEX },2340 { -64, IWL_RATE_48M_INDEX },2341 { -68, IWL_RATE_36M_INDEX },2342 { -80, IWL_RATE_24M_INDEX },2343 { -84, IWL_RATE_18M_INDEX },2344 { -85, IWL_RATE_12M_INDEX },2345 { -86, IWL_RATE_11M_INDEX },2346 { -88, IWL_RATE_5M_INDEX },2347 { -90, IWL_RATE_2M_INDEX },2348 { S8_MIN, IWL_RATE_1M_INDEX },2349};2350 2351static const struct rs_init_rate_info rs_optimal_rates_5ghz_legacy[] = {2352 { -60, IWL_RATE_54M_INDEX },2353 { -64, IWL_RATE_48M_INDEX },2354 { -72, IWL_RATE_36M_INDEX },2355 { -80, IWL_RATE_24M_INDEX },2356 { -84, IWL_RATE_18M_INDEX },2357 { -85, IWL_RATE_12M_INDEX },2358 { -87, IWL_RATE_9M_INDEX },2359 { S8_MIN, IWL_RATE_6M_INDEX },2360};2361 2362static const struct rs_init_rate_info rs_optimal_rates_ht[] = {2363 { -60, IWL_RATE_MCS_7_INDEX },2364 { -64, IWL_RATE_MCS_6_INDEX },2365 { -68, IWL_RATE_MCS_5_INDEX },2366 { -72, IWL_RATE_MCS_4_INDEX },2367 { -80, IWL_RATE_MCS_3_INDEX },2368 { -84, IWL_RATE_MCS_2_INDEX },2369 { -85, IWL_RATE_MCS_1_INDEX },2370 { S8_MIN, IWL_RATE_MCS_0_INDEX},2371};2372 2373/* MCS index 9 is not valid for 20MHz VHT channel width,2374 * but is ok for 40, 80 and 160MHz channels.2375 */2376static const struct rs_init_rate_info rs_optimal_rates_vht_20mhz[] = {2377 { -60, IWL_RATE_MCS_8_INDEX },2378 { -64, IWL_RATE_MCS_7_INDEX },2379 { -68, IWL_RATE_MCS_6_INDEX },2380 { -72, IWL_RATE_MCS_5_INDEX },2381 { -80, IWL_RATE_MCS_4_INDEX },2382 { -84, IWL_RATE_MCS_3_INDEX },2383 { -85, IWL_RATE_MCS_2_INDEX },2384 { -87, IWL_RATE_MCS_1_INDEX },2385 { S8_MIN, IWL_RATE_MCS_0_INDEX},2386};2387 2388static const struct rs_init_rate_info rs_optimal_rates_vht[] = {2389 { -60, IWL_RATE_MCS_9_INDEX },2390 { -64, IWL_RATE_MCS_8_INDEX },2391 { -68, IWL_RATE_MCS_7_INDEX },2392 { -72, IWL_RATE_MCS_6_INDEX },2393 { -80, IWL_RATE_MCS_5_INDEX },2394 { -84, IWL_RATE_MCS_4_INDEX },2395 { -85, IWL_RATE_MCS_3_INDEX },2396 { -87, IWL_RATE_MCS_2_INDEX },2397 { -88, IWL_RATE_MCS_1_INDEX },2398 { S8_MIN, IWL_RATE_MCS_0_INDEX },2399};2400 2401#define IWL_RS_LOW_RSSI_THRESHOLD (-76) /* dBm */2402 2403/* Init the optimal rate based on STA caps2404 * This combined with rssi is used to report the last tx rate2405 * to userspace when we haven't transmitted enough frames.2406 */2407static void rs_init_optimal_rate(struct iwl_mvm *mvm,2408 struct ieee80211_sta *sta,2409 struct iwl_lq_sta *lq_sta)2410{2411 struct rs_rate *rate = &lq_sta->optimal_rate;2412 2413 if (lq_sta->max_mimo2_rate_idx != IWL_RATE_INVALID)2414 rate->type = lq_sta->is_vht ? LQ_VHT_MIMO2 : LQ_HT_MIMO2;2415 else if (lq_sta->max_siso_rate_idx != IWL_RATE_INVALID)2416 rate->type = lq_sta->is_vht ? LQ_VHT_SISO : LQ_HT_SISO;2417 else if (lq_sta->band == NL80211_BAND_5GHZ)2418 rate->type = LQ_LEGACY_A;2419 else2420 rate->type = LQ_LEGACY_G;2421 2422 rate->bw = rs_bw_from_sta_bw(sta);2423 rate->sgi = rs_sgi_allow(mvm, sta, rate, NULL);2424 2425 /* ANT/LDPC/STBC aren't relevant for the rate reported to userspace */2426 2427 if (is_mimo(rate)) {2428 lq_sta->optimal_rate_mask = lq_sta->active_mimo2_rate;2429 } else if (is_siso(rate)) {2430 lq_sta->optimal_rate_mask = lq_sta->active_siso_rate;2431 } else {2432 lq_sta->optimal_rate_mask = lq_sta->active_legacy_rate;2433 2434 if (lq_sta->band == NL80211_BAND_5GHZ) {2435 lq_sta->optimal_rates = rs_optimal_rates_5ghz_legacy;2436 lq_sta->optimal_nentries =2437 ARRAY_SIZE(rs_optimal_rates_5ghz_legacy);2438 } else {2439 lq_sta->optimal_rates = rs_optimal_rates_24ghz_legacy;2440 lq_sta->optimal_nentries =2441 ARRAY_SIZE(rs_optimal_rates_24ghz_legacy);2442 }2443 }2444 2445 if (is_vht(rate)) {2446 if (rate->bw == RATE_MCS_CHAN_WIDTH_20) {2447 lq_sta->optimal_rates = rs_optimal_rates_vht_20mhz;2448 lq_sta->optimal_nentries =2449 ARRAY_SIZE(rs_optimal_rates_vht_20mhz);2450 } else {2451 lq_sta->optimal_rates = rs_optimal_rates_vht;2452 lq_sta->optimal_nentries =2453 ARRAY_SIZE(rs_optimal_rates_vht);2454 }2455 } else if (is_ht(rate)) {2456 lq_sta->optimal_rates = rs_optimal_rates_ht;2457 lq_sta->optimal_nentries = ARRAY_SIZE(rs_optimal_rates_ht);2458 }2459}2460 2461/* Compute the optimal rate index based on RSSI */2462static struct rs_rate *rs_get_optimal_rate(struct iwl_mvm *mvm,2463 struct iwl_lq_sta *lq_sta)2464{2465 struct rs_rate *rate = &lq_sta->optimal_rate;2466 int i;2467 2468 rate->index = find_first_bit(&lq_sta->optimal_rate_mask,2469 BITS_PER_LONG);2470 2471 for (i = 0; i < lq_sta->optimal_nentries; i++) {2472 int rate_idx = lq_sta->optimal_rates[i].rate_idx;2473 2474 if ((lq_sta->pers.last_rssi >= lq_sta->optimal_rates[i].rssi) &&2475 (BIT(rate_idx) & lq_sta->optimal_rate_mask)) {2476 rate->index = rate_idx;2477 break;2478 }2479 }2480 2481 return rate;2482}2483 2484/* Choose an initial legacy rate and antenna to use based on the RSSI2485 * of last Rx2486 */2487static void rs_get_initial_rate(struct iwl_mvm *mvm,2488 struct ieee80211_sta *sta,2489 struct iwl_lq_sta *lq_sta,2490 enum nl80211_band band,2491 struct rs_rate *rate)2492{2493 struct iwl_mvm_sta *mvmsta = iwl_mvm_sta_from_mac80211(sta);2494 int i, nentries;2495 unsigned long active_rate;2496 s8 best_rssi = S8_MIN;2497 u8 best_ant = ANT_NONE;2498 u8 valid_tx_ant = iwl_mvm_get_valid_tx_ant(mvm);2499 const struct rs_init_rate_info *initial_rates;2500 2501 for (i = 0; i < ARRAY_SIZE(lq_sta->pers.chain_signal); i++) {2502 if (!(lq_sta->pers.chains & BIT(i)))2503 continue;2504 2505 if (lq_sta->pers.chain_signal[i] > best_rssi) {2506 best_rssi = lq_sta->pers.chain_signal[i];2507 best_ant = BIT(i);2508 }2509 }2510 2511 IWL_DEBUG_RATE(mvm, "Best ANT: %s Best RSSI: %d\n",2512 iwl_rs_pretty_ant(best_ant), best_rssi);2513 2514 if (best_ant != ANT_A && best_ant != ANT_B)2515 rate->ant = first_antenna(valid_tx_ant);2516 else2517 rate->ant = best_ant;2518 2519 rate->sgi = false;2520 rate->ldpc = false;2521 rate->bw = RATE_MCS_CHAN_WIDTH_20;2522 2523 rate->index = find_first_bit(&lq_sta->active_legacy_rate,2524 BITS_PER_LONG);2525 2526 if (band == NL80211_BAND_5GHZ) {2527 rate->type = LQ_LEGACY_A;2528 initial_rates = rs_optimal_rates_5ghz_legacy;2529 nentries = ARRAY_SIZE(rs_optimal_rates_5ghz_legacy);2530 } else {2531 rate->type = LQ_LEGACY_G;2532 initial_rates = rs_optimal_rates_24ghz_legacy;2533 nentries = ARRAY_SIZE(rs_optimal_rates_24ghz_legacy);2534 }2535 2536 if (!IWL_MVM_RS_RSSI_BASED_INIT_RATE)2537 goto out;2538 2539 /* Start from a higher rate if the corresponding debug capability2540 * is enabled. The rate is chosen according to AP capabilities.2541 * In case of VHT/HT when the rssi is low fallback to the case of2542 * legacy rates.2543 */2544 if (sta->deflink.vht_cap.vht_supported &&2545 best_rssi > IWL_RS_LOW_RSSI_THRESHOLD) {2546 /*2547 * In AP mode, when a new station associates, rs is initialized2548 * immediately upon association completion, before the phy2549 * context is updated with the association parameters, so the2550 * sta bandwidth might be wider than the phy context allows.2551 * To avoid this issue, always initialize rs with 20mhz2552 * bandwidth rate, and after authorization, when the phy context2553 * is already up-to-date, re-init rs with the correct bw.2554 */2555 u32 bw = mvmsta->sta_state < IEEE80211_STA_AUTHORIZED ?2556 RATE_MCS_CHAN_WIDTH_20 : rs_bw_from_sta_bw(sta);2557 2558 switch (bw) {2559 case RATE_MCS_CHAN_WIDTH_40:2560 case RATE_MCS_CHAN_WIDTH_80:2561 case RATE_MCS_CHAN_WIDTH_160:2562 initial_rates = rs_optimal_rates_vht;2563 nentries = ARRAY_SIZE(rs_optimal_rates_vht);2564 break;2565 case RATE_MCS_CHAN_WIDTH_20:2566 initial_rates = rs_optimal_rates_vht_20mhz;2567 nentries = ARRAY_SIZE(rs_optimal_rates_vht_20mhz);2568 break;2569 default:2570 IWL_ERR(mvm, "Invalid BW %d\n",2571 sta->deflink.bandwidth);2572 goto out;2573 }2574 2575 active_rate = lq_sta->active_siso_rate;2576 rate->type = LQ_VHT_SISO;2577 rate->bw = bw;2578 } else if (sta->deflink.ht_cap.ht_supported &&2579 best_rssi > IWL_RS_LOW_RSSI_THRESHOLD) {2580 initial_rates = rs_optimal_rates_ht;2581 nentries = ARRAY_SIZE(rs_optimal_rates_ht);2582 active_rate = lq_sta->active_siso_rate;2583 rate->type = LQ_HT_SISO;2584 } else {2585 active_rate = lq_sta->active_legacy_rate;2586 }2587 2588 for (i = 0; i < nentries; i++) {2589 int rate_idx = initial_rates[i].rate_idx;2590 2591 if ((best_rssi >= initial_rates[i].rssi) &&2592 (BIT(rate_idx) & active_rate)) {2593 rate->index = rate_idx;2594 break;2595 }2596 }2597 2598out:2599 rs_dump_rate(mvm, rate, "INITIAL");2600}2601 2602/* Save info about RSSI of last Rx */2603void rs_update_last_rssi(struct iwl_mvm *mvm,2604 struct iwl_mvm_sta *mvmsta,2605 struct ieee80211_rx_status *rx_status)2606{2607 struct iwl_lq_sta *lq_sta = &mvmsta->deflink.lq_sta.rs_drv;2608 int i;2609 2610 lq_sta->pers.chains = rx_status->chains;2611 lq_sta->pers.chain_signal[0] = rx_status->chain_signal[0];2612 lq_sta->pers.chain_signal[1] = rx_status->chain_signal[1];2613 lq_sta->pers.last_rssi = S8_MIN;2614 2615 for (i = 0; i < ARRAY_SIZE(lq_sta->pers.chain_signal); i++) {2616 if (!(lq_sta->pers.chains & BIT(i)))2617 continue;2618 2619 if (lq_sta->pers.chain_signal[i] > lq_sta->pers.last_rssi)2620 lq_sta->pers.last_rssi = lq_sta->pers.chain_signal[i];2621 }2622}2623 2624/*2625 * rs_initialize_lq - Initialize a station's hardware rate table2626 *2627 * The uCode's station table contains a table of fallback rates2628 * for automatic fallback during transmission.2629 *2630 * NOTE: This sets up a default set of values. These will be replaced later2631 * if the driver's iwl-agn-rs rate scaling algorithm is used, instead of2632 * rc80211_simple.2633 *2634 * NOTE: Run REPLY_ADD_STA command to set up station table entry, before2635 * calling this function (which runs REPLY_TX_LINK_QUALITY_CMD,2636 * which requires station table entry to exist).2637 */2638static void rs_initialize_lq(struct iwl_mvm *mvm,2639 struct ieee80211_sta *sta,2640 struct iwl_lq_sta *lq_sta,2641 enum nl80211_band band)2642{2643 struct iwl_scale_tbl_info *tbl;2644 struct rs_rate *rate;2645 u8 active_tbl = 0;2646 2647 if (!sta || !lq_sta)2648 return;2649 2650 if (!lq_sta->search_better_tbl)2651 active_tbl = lq_sta->active_tbl;2652 else2653 active_tbl = rs_search_tbl(lq_sta->active_tbl);2654 2655 tbl = &(lq_sta->lq_info[active_tbl]);2656 rate = &tbl->rate;2657 2658 rs_get_initial_rate(mvm, sta, lq_sta, band, rate);2659 rs_init_optimal_rate(mvm, sta, lq_sta);2660 2661 WARN_ONCE(rate->ant != ANT_A && rate->ant != ANT_B,2662 "ant: 0x%x, chains 0x%x, fw tx ant: 0x%x, nvm tx ant: 0x%x\n",2663 rate->ant, lq_sta->pers.chains, mvm->fw->valid_tx_ant,2664 mvm->nvm_data ? mvm->nvm_data->valid_tx_ant : ANT_INVALID);2665 2666 tbl->column = rs_get_column_from_rate(rate);2667 2668 rs_set_expected_tpt_table(lq_sta, tbl);2669 rs_fill_lq_cmd(mvm, sta, lq_sta, rate);2670 /* TODO restore station should remember the lq cmd */2671 iwl_mvm_send_lq_cmd(mvm, &lq_sta->lq);2672}2673 2674static void rs_drv_get_rate(void *mvm_r, struct ieee80211_sta *sta,2675 void *mvm_sta,2676 struct ieee80211_tx_rate_control *txrc)2677{2678 struct iwl_op_mode *op_mode = mvm_r;2679 struct iwl_mvm *mvm __maybe_unused = IWL_OP_MODE_GET_MVM(op_mode);2680 struct sk_buff *skb = txrc->skb;2681 struct ieee80211_tx_info *info = IEEE80211_SKB_CB(skb);2682 struct iwl_lq_sta *lq_sta;2683 struct rs_rate *optimal_rate;2684 u32 last_ucode_rate;2685 2686 if (sta && !iwl_mvm_sta_from_mac80211(sta)->vif) {2687 /* if vif isn't initialized mvm doesn't know about2688 * this station, so don't do anything with the it2689 */2690 mvm_sta = NULL;2691 }2692 2693 if (!mvm_sta)2694 return;2695 2696 lq_sta = mvm_sta;2697 2698 spin_lock_bh(&lq_sta->pers.lock);2699 iwl_mvm_hwrate_to_tx_rate_v1(lq_sta->last_rate_n_flags,2700 info->band, &info->control.rates[0]);2701 info->control.rates[0].count = 1;2702 2703 /* Report the optimal rate based on rssi and STA caps if we haven't2704 * converged yet (too little traffic) or exploring other modulations2705 */2706 if (lq_sta->rs_state != RS_STATE_STAY_IN_COLUMN) {2707 optimal_rate = rs_get_optimal_rate(mvm, lq_sta);2708 last_ucode_rate = ucode_rate_from_rs_rate(mvm,2709 optimal_rate);2710 iwl_mvm_hwrate_to_tx_rate_v1(last_ucode_rate, info->band,2711 &txrc->reported_rate);2712 }2713 spin_unlock_bh(&lq_sta->pers.lock);2714}2715 2716static void *rs_drv_alloc_sta(void *mvm_rate, struct ieee80211_sta *sta,2717 gfp_t gfp)2718{2719 struct iwl_mvm_sta *mvmsta = iwl_mvm_sta_from_mac80211(sta);2720 struct iwl_op_mode *op_mode = (struct iwl_op_mode *)mvm_rate;2721 struct iwl_mvm *mvm = IWL_OP_MODE_GET_MVM(op_mode);2722 struct iwl_lq_sta *lq_sta = &mvmsta->deflink.lq_sta.rs_drv;2723 2724 IWL_DEBUG_RATE(mvm, "create station rate scale window\n");2725 2726 lq_sta->pers.drv = mvm;2727#ifdef CONFIG_MAC80211_DEBUGFS2728 lq_sta->pers.dbg_fixed_rate = 0;2729 lq_sta->pers.dbg_fixed_txp_reduction = TPC_INVALID;2730 lq_sta->pers.ss_force = RS_SS_FORCE_NONE;2731#endif2732 lq_sta->pers.chains = 0;2733 memset(lq_sta->pers.chain_signal, 0, sizeof(lq_sta->pers.chain_signal));2734 lq_sta->pers.last_rssi = S8_MIN;2735 2736 return lq_sta;2737}2738 2739static int rs_vht_highest_rx_mcs_index(struct ieee80211_sta_vht_cap *vht_cap,2740 int nss)2741{2742 u16 rx_mcs = le16_to_cpu(vht_cap->vht_mcs.rx_mcs_map) &2743 (0x3 << (2 * (nss - 1)));2744 rx_mcs >>= (2 * (nss - 1));2745 2746 if (rx_mcs == IEEE80211_VHT_MCS_SUPPORT_0_7)2747 return IWL_RATE_MCS_7_INDEX;2748 else if (rx_mcs == IEEE80211_VHT_MCS_SUPPORT_0_8)2749 return IWL_RATE_MCS_8_INDEX;2750 else if (rx_mcs == IEEE80211_VHT_MCS_SUPPORT_0_9)2751 return IWL_RATE_MCS_9_INDEX;2752 2753 WARN_ON_ONCE(rx_mcs != IEEE80211_VHT_MCS_NOT_SUPPORTED);2754 return -1;2755}2756 2757static void rs_vht_set_enabled_rates(struct ieee80211_sta *sta,2758 struct ieee80211_sta_vht_cap *vht_cap,2759 struct iwl_lq_sta *lq_sta)2760{2761 int i;2762 int highest_mcs = rs_vht_highest_rx_mcs_index(vht_cap, 1);2763 2764 if (highest_mcs >= IWL_RATE_MCS_0_INDEX) {2765 for (i = IWL_RATE_MCS_0_INDEX; i <= highest_mcs; i++) {2766 if (i == IWL_RATE_9M_INDEX)2767 continue;2768 2769 /* VHT MCS9 isn't valid for 20Mhz for NSS=1,2 */2770 if (i == IWL_RATE_MCS_9_INDEX &&2771 sta->deflink.bandwidth == IEEE80211_STA_RX_BW_20)2772 continue;2773 2774 lq_sta->active_siso_rate |= BIT(i);2775 }2776 }2777 2778 if (sta->deflink.rx_nss < 2)2779 return;2780 2781 highest_mcs = rs_vht_highest_rx_mcs_index(vht_cap, 2);2782 if (highest_mcs >= IWL_RATE_MCS_0_INDEX) {2783 for (i = IWL_RATE_MCS_0_INDEX; i <= highest_mcs; i++) {2784 if (i == IWL_RATE_9M_INDEX)2785 continue;2786 2787 /* VHT MCS9 isn't valid for 20Mhz for NSS=1,2 */2788 if (i == IWL_RATE_MCS_9_INDEX &&2789 sta->deflink.bandwidth == IEEE80211_STA_RX_BW_20)2790 continue;2791 2792 lq_sta->active_mimo2_rate |= BIT(i);2793 }2794 }2795}2796 2797static void rs_ht_init(struct iwl_mvm *mvm,2798 struct ieee80211_sta *sta,2799 struct iwl_lq_sta *lq_sta,2800 struct ieee80211_sta_ht_cap *ht_cap)2801{2802 /* active_siso_rate mask includes 9 MBits (bit 5),2803 * and CCK (bits 0-3), supp_rates[] does not;2804 * shift to convert format, force 9 MBits off.2805 */2806 lq_sta->active_siso_rate = ht_cap->mcs.rx_mask[0] << 1;2807 lq_sta->active_siso_rate |= ht_cap->mcs.rx_mask[0] & 0x1;2808 lq_sta->active_siso_rate &= ~((u16)0x2);2809 lq_sta->active_siso_rate <<= IWL_FIRST_OFDM_RATE;2810 2811 lq_sta->active_mimo2_rate = ht_cap->mcs.rx_mask[1] << 1;2812 lq_sta->active_mimo2_rate |= ht_cap->mcs.rx_mask[1] & 0x1;2813 lq_sta->active_mimo2_rate &= ~((u16)0x2);2814 lq_sta->active_mimo2_rate <<= IWL_FIRST_OFDM_RATE;2815 2816 if (mvm->cfg->ht_params->ldpc &&2817 (ht_cap->cap & IEEE80211_HT_CAP_LDPC_CODING))2818 lq_sta->ldpc = true;2819 2820 if (mvm->cfg->ht_params->stbc &&2821 (num_of_ant(iwl_mvm_get_valid_tx_ant(mvm)) > 1) &&2822 (ht_cap->cap & IEEE80211_HT_CAP_RX_STBC))2823 lq_sta->stbc_capable = true;2824 2825 lq_sta->is_vht = false;2826}2827 2828static void rs_vht_init(struct iwl_mvm *mvm,2829 struct ieee80211_sta *sta,2830 struct iwl_lq_sta *lq_sta,2831 struct ieee80211_sta_vht_cap *vht_cap)2832{2833 rs_vht_set_enabled_rates(sta, vht_cap, lq_sta);2834 2835 if (mvm->cfg->ht_params->ldpc &&2836 (vht_cap->cap & IEEE80211_VHT_CAP_RXLDPC))2837 lq_sta->ldpc = true;2838 2839 if (mvm->cfg->ht_params->stbc &&2840 (num_of_ant(iwl_mvm_get_valid_tx_ant(mvm)) > 1) &&2841 (vht_cap->cap & IEEE80211_VHT_CAP_RXSTBC_MASK))2842 lq_sta->stbc_capable = true;2843 2844 if (fw_has_capa(&mvm->fw->ucode_capa, IWL_UCODE_TLV_CAPA_BEAMFORMER) &&2845 (num_of_ant(iwl_mvm_get_valid_tx_ant(mvm)) > 1) &&2846 (vht_cap->cap & IEEE80211_VHT_CAP_SU_BEAMFORMEE_CAPABLE))2847 lq_sta->bfer_capable = true;2848 2849 lq_sta->is_vht = true;2850}2851 2852#ifdef CONFIG_IWLWIFI_DEBUGFS2853void iwl_mvm_reset_frame_stats(struct iwl_mvm *mvm)2854{2855 spin_lock_bh(&mvm->drv_stats_lock);2856 memset(&mvm->drv_rx_stats, 0, sizeof(mvm->drv_rx_stats));2857 spin_unlock_bh(&mvm->drv_stats_lock);2858}2859 2860void iwl_mvm_update_frame_stats(struct iwl_mvm *mvm, u32 rate, bool agg)2861{2862 u8 nss = 0;2863 2864 spin_lock(&mvm->drv_stats_lock);2865 2866 if (agg)2867 mvm->drv_rx_stats.agg_frames++;2868 2869 mvm->drv_rx_stats.success_frames++;2870 2871 switch (rate & RATE_MCS_CHAN_WIDTH_MSK_V1) {2872 case RATE_MCS_CHAN_WIDTH_20:2873 mvm->drv_rx_stats.bw_20_frames++;2874 break;2875 case RATE_MCS_CHAN_WIDTH_40:2876 mvm->drv_rx_stats.bw_40_frames++;2877 break;2878 case RATE_MCS_CHAN_WIDTH_80:2879 mvm->drv_rx_stats.bw_80_frames++;2880 break;2881 case RATE_MCS_CHAN_WIDTH_160:2882 mvm->drv_rx_stats.bw_160_frames++;2883 break;2884 default:2885 WARN_ONCE(1, "bad BW. rate 0x%x", rate);2886 }2887 2888 if (rate & RATE_MCS_HT_MSK_V1) {2889 mvm->drv_rx_stats.ht_frames++;2890 nss = ((rate & RATE_HT_MCS_NSS_MSK_V1) >> RATE_HT_MCS_NSS_POS_V1) + 1;2891 } else if (rate & RATE_MCS_VHT_MSK_V1) {2892 mvm->drv_rx_stats.vht_frames++;2893 nss = FIELD_GET(RATE_MCS_NSS_MSK, rate) + 1;2894 } else {2895 mvm->drv_rx_stats.legacy_frames++;2896 }2897 2898 if (nss == 1)2899 mvm->drv_rx_stats.siso_frames++;2900 else if (nss == 2)2901 mvm->drv_rx_stats.mimo2_frames++;2902 2903 if (rate & RATE_MCS_SGI_MSK_V1)2904 mvm->drv_rx_stats.sgi_frames++;2905 else2906 mvm->drv_rx_stats.ngi_frames++;2907 2908 mvm->drv_rx_stats.last_rates[mvm->drv_rx_stats.last_frame_idx] = rate;2909 mvm->drv_rx_stats.last_frame_idx =2910 (mvm->drv_rx_stats.last_frame_idx + 1) %2911 ARRAY_SIZE(mvm->drv_rx_stats.last_rates);2912 2913 spin_unlock(&mvm->drv_stats_lock);2914}2915#endif2916 2917/*2918 * Called after adding a new station to initialize rate scaling2919 */2920static void rs_drv_rate_init(struct iwl_mvm *mvm, struct ieee80211_sta *sta,2921 enum nl80211_band band)2922{2923 int i, j;2924 struct ieee80211_hw *hw = mvm->hw;2925 struct ieee80211_sta_ht_cap *ht_cap = &sta->deflink.ht_cap;2926 struct ieee80211_sta_vht_cap *vht_cap = &sta->deflink.vht_cap;2927 struct iwl_mvm_sta *mvmsta = iwl_mvm_sta_from_mac80211(sta);2928 struct iwl_lq_sta *lq_sta = &mvmsta->deflink.lq_sta.rs_drv;2929 struct ieee80211_supported_band *sband;2930 unsigned long supp; /* must be unsigned long for for_each_set_bit */2931 2932 lockdep_assert_held(&mvmsta->deflink.lq_sta.rs_drv.pers.lock);2933 2934 /* clear all non-persistent lq data */2935 memset(lq_sta, 0, offsetof(typeof(*lq_sta), pers));2936 2937 sband = hw->wiphy->bands[band];2938 2939 lq_sta->lq.sta_id = mvmsta->deflink.sta_id;2940 mvmsta->amsdu_enabled = 0;2941 mvmsta->max_amsdu_len = sta->cur->max_amsdu_len;2942 2943 for (j = 0; j < LQ_SIZE; j++)2944 rs_rate_scale_clear_tbl_windows(mvm, &lq_sta->lq_info[j]);2945 2946 lq_sta->flush_timer = 0;2947 lq_sta->last_tx = jiffies;2948 2949 IWL_DEBUG_RATE(mvm,2950 "LQ: *** rate scale station global init for station %d ***\n",2951 mvmsta->deflink.sta_id);2952 /* TODO: what is a good starting rate for STA? About middle? Maybe not2953 * the lowest or the highest rate.. Could consider using RSSI from2954 * previous packets? Need to have IEEE 802.1X auth succeed immediately2955 * after assoc.. */2956 2957 lq_sta->missed_rate_counter = IWL_MVM_RS_MISSED_RATE_MAX;2958 lq_sta->band = sband->band;2959 /*2960 * active legacy rates as per supported rates bitmap2961 */2962 supp = sta->deflink.supp_rates[sband->band];2963 lq_sta->active_legacy_rate = 0;2964 for_each_set_bit(i, &supp, BITS_PER_LONG)2965 lq_sta->active_legacy_rate |= BIT(sband->bitrates[i].hw_value);2966 2967 /* TODO: should probably account for rx_highest for both HT/VHT */2968 if (!vht_cap || !vht_cap->vht_supported)2969 rs_ht_init(mvm, sta, lq_sta, ht_cap);2970 else2971 rs_vht_init(mvm, sta, lq_sta, vht_cap);2972 2973 lq_sta->max_legacy_rate_idx =2974 rs_get_max_rate_from_mask(lq_sta->active_legacy_rate);2975 lq_sta->max_siso_rate_idx =2976 rs_get_max_rate_from_mask(lq_sta->active_siso_rate);2977 lq_sta->max_mimo2_rate_idx =2978 rs_get_max_rate_from_mask(lq_sta->active_mimo2_rate);2979 2980 IWL_DEBUG_RATE(mvm,2981 "LEGACY=%lX SISO=%lX MIMO2=%lX VHT=%d LDPC=%d STBC=%d BFER=%d\n",2982 lq_sta->active_legacy_rate,2983 lq_sta->active_siso_rate,2984 lq_sta->active_mimo2_rate,2985 lq_sta->is_vht, lq_sta->ldpc, lq_sta->stbc_capable,2986 lq_sta->bfer_capable);2987 IWL_DEBUG_RATE(mvm, "MAX RATE: LEGACY=%d SISO=%d MIMO2=%d\n",2988 lq_sta->max_legacy_rate_idx,2989 lq_sta->max_siso_rate_idx,2990 lq_sta->max_mimo2_rate_idx);2991 2992 /* These values will be overridden later */2993 lq_sta->lq.single_stream_ant_msk =2994 iwl_mvm_bt_coex_get_single_ant_msk(mvm, iwl_mvm_get_valid_tx_ant(mvm));2995 lq_sta->lq.dual_stream_ant_msk = ANT_AB;2996 2997 /* as default allow aggregation for all tids */2998 lq_sta->tx_agg_tid_en = IWL_AGG_ALL_TID;2999 lq_sta->is_agg = 0;3000#ifdef CONFIG_IWLWIFI_DEBUGFS3001 iwl_mvm_reset_frame_stats(mvm);3002#endif3003 rs_initialize_lq(mvm, sta, lq_sta, band);3004}3005 3006static void rs_drv_rate_update(void *mvm_r,3007 struct ieee80211_supported_band *sband,3008 struct cfg80211_chan_def *chandef,3009 struct ieee80211_sta *sta,3010 void *priv_sta, u32 changed)3011{3012 struct iwl_op_mode *op_mode = mvm_r;3013 struct iwl_mvm_sta *mvmsta = iwl_mvm_sta_from_mac80211(sta);3014 struct iwl_mvm *mvm __maybe_unused = IWL_OP_MODE_GET_MVM(op_mode);3015 u8 tid;3016 3017 if (!mvmsta->vif)3018 return;3019 3020 /* Stop any ongoing aggregations as rs starts off assuming no agg */3021 for (tid = 0; tid < IWL_MAX_TID_COUNT; tid++)3022 ieee80211_stop_tx_ba_session(sta, tid);3023 3024 iwl_mvm_rs_rate_init(mvm, mvmsta->vif, sta,3025 &mvmsta->vif->bss_conf, &sta->deflink,3026 sband->band);3027}3028 3029static void __iwl_mvm_rs_tx_status(struct iwl_mvm *mvm,3030 struct ieee80211_sta *sta,3031 int tid, struct ieee80211_tx_info *info,3032 bool ndp)3033{3034 int legacy_success;3035 int retries;3036 int i;3037 struct iwl_lq_cmd *table;3038 u32 lq_hwrate;3039 struct rs_rate lq_rate, tx_resp_rate;3040 struct iwl_scale_tbl_info *curr_tbl, *other_tbl, *tmp_tbl;3041 u32 tlc_info = (uintptr_t)info->status.status_driver_data[0];3042 u8 reduced_txp = tlc_info & RS_DRV_DATA_TXP_MSK;3043 u8 lq_color = RS_DRV_DATA_LQ_COLOR_GET(tlc_info);3044 u32 tx_resp_hwrate = (uintptr_t)info->status.status_driver_data[1];3045 struct iwl_mvm_sta *mvmsta = iwl_mvm_sta_from_mac80211(sta);3046 struct iwl_lq_sta *lq_sta = &mvmsta->deflink.lq_sta.rs_drv;3047 3048 if (!lq_sta->pers.drv) {3049 IWL_DEBUG_RATE(mvm, "Rate scaling not initialized yet.\n");3050 return;3051 }3052 3053 /* This packet was aggregated but doesn't carry status info */3054 if ((info->flags & IEEE80211_TX_CTL_AMPDU) &&3055 !(info->flags & IEEE80211_TX_STAT_AMPDU))3056 return;3057 3058 if (rs_rate_from_ucode_rate(tx_resp_hwrate, info->band,3059 &tx_resp_rate)) {3060 WARN_ON_ONCE(1);3061 return;3062 }3063 3064#ifdef CONFIG_MAC80211_DEBUGFS3065 /* Disable last tx check if we are debugging with fixed rate but3066 * update tx stats3067 */3068 if (lq_sta->pers.dbg_fixed_rate) {3069 int index = tx_resp_rate.index;3070 enum rs_column column;3071 int attempts, success;3072 3073 column = rs_get_column_from_rate(&tx_resp_rate);3074 if (WARN_ONCE(column == RS_COLUMN_INVALID,3075 "Can't map rate 0x%x to column",3076 tx_resp_hwrate))3077 return;3078 3079 if (info->flags & IEEE80211_TX_STAT_AMPDU) {3080 attempts = info->status.ampdu_len;3081 success = info->status.ampdu_ack_len;3082 } else {3083 attempts = info->status.rates[0].count;3084 success = !!(info->flags & IEEE80211_TX_STAT_ACK);3085 }3086 3087 lq_sta->pers.tx_stats[column][index].total += attempts;3088 lq_sta->pers.tx_stats[column][index].success += success;3089 3090 IWL_DEBUG_RATE(mvm, "Fixed rate 0x%x success %d attempts %d\n",3091 tx_resp_hwrate, success, attempts);3092 return;3093 }3094#endif3095 3096 if (time_after(jiffies,3097 (unsigned long)(lq_sta->last_tx +3098 (IWL_MVM_RS_IDLE_TIMEOUT * HZ)))) {3099 IWL_DEBUG_RATE(mvm, "Tx idle for too long. reinit rs\n");3100 /* reach here only in case of driver RS, call directly3101 * the unlocked version3102 */3103 rs_drv_rate_init(mvm, sta, info->band);3104 return;3105 }3106 lq_sta->last_tx = jiffies;3107 3108 /* Ignore this Tx frame response if its initial rate doesn't match3109 * that of latest Link Quality command. There may be stragglers3110 * from a previous Link Quality command, but we're no longer interested3111 * in those; they're either from the "active" mode while we're trying3112 * to check "search" mode, or a prior "search" mode after we've moved3113 * to a new "search" mode (which might become the new "active" mode).3114 */3115 table = &lq_sta->lq;3116 lq_hwrate = le32_to_cpu(table->rs_table[0]);3117 if (rs_rate_from_ucode_rate(lq_hwrate, info->band, &lq_rate)) {3118 WARN_ON_ONCE(1);3119 return;3120 }3121 3122 /* Here we actually compare this rate to the latest LQ command */3123 if (lq_color != LQ_FLAG_COLOR_GET(table->flags)) {3124 IWL_DEBUG_RATE(mvm,3125 "tx resp color 0x%x does not match 0x%x\n",3126 lq_color, LQ_FLAG_COLOR_GET(table->flags));3127 3128 /* Since rates mis-match, the last LQ command may have failed.3129 * After IWL_MISSED_RATE_MAX mis-matches, resync the uCode with3130 * ... driver.3131 */3132 lq_sta->missed_rate_counter++;3133 if (lq_sta->missed_rate_counter > IWL_MVM_RS_MISSED_RATE_MAX) {3134 lq_sta->missed_rate_counter = 0;3135 IWL_DEBUG_RATE(mvm,3136 "Too many rates mismatch. Send sync LQ. rs_state %d\n",3137 lq_sta->rs_state);3138 iwl_mvm_send_lq_cmd(mvm, &lq_sta->lq);3139 }3140 /* Regardless, ignore this status info for outdated rate */3141 return;3142 }3143 3144 /* Rate did match, so reset the missed_rate_counter */3145 lq_sta->missed_rate_counter = 0;3146 3147 if (!lq_sta->search_better_tbl) {3148 curr_tbl = &lq_sta->lq_info[lq_sta->active_tbl];3149 other_tbl = &lq_sta->lq_info[rs_search_tbl(lq_sta->active_tbl)];3150 } else {3151 curr_tbl = &lq_sta->lq_info[rs_search_tbl(lq_sta->active_tbl)];3152 other_tbl = &lq_sta->lq_info[lq_sta->active_tbl];3153 }3154 3155 if (WARN_ON_ONCE(!rs_rate_column_match(&lq_rate, &curr_tbl->rate))) {3156 IWL_DEBUG_RATE(mvm,3157 "Neither active nor search matches tx rate\n");3158 tmp_tbl = &lq_sta->lq_info[lq_sta->active_tbl];3159 rs_dump_rate(mvm, &tmp_tbl->rate, "ACTIVE");3160 tmp_tbl = &lq_sta->lq_info[rs_search_tbl(lq_sta->active_tbl)];3161 rs_dump_rate(mvm, &tmp_tbl->rate, "SEARCH");3162 rs_dump_rate(mvm, &lq_rate, "ACTUAL");3163 3164 /* no matching table found, let's by-pass the data collection3165 * and continue to perform rate scale to find the rate table3166 */3167 rs_stay_in_table(lq_sta, true);3168 goto done;3169 }3170 3171 /* Updating the frame history depends on whether packets were3172 * aggregated.3173 *3174 * For aggregation, all packets were transmitted at the same rate, the3175 * first index into rate scale table.3176 */3177 if (info->flags & IEEE80211_TX_STAT_AMPDU) {3178 rs_collect_tpc_data(mvm, lq_sta, curr_tbl, tx_resp_rate.index,3179 info->status.ampdu_len,3180 info->status.ampdu_ack_len,3181 reduced_txp);3182 3183 /* ampdu_ack_len = 0 marks no BA was received. For TLC, treat3184 * it as a single frame loss as we don't want the success ratio3185 * to dip too quickly because a BA wasn't received.3186 * For TPC, there's no need for this optimisation since we want3187 * to recover very quickly from a bad power reduction and,3188 * therefore we'd like the success ratio to get an immediate hit3189 * when failing to get a BA, so we'd switch back to a lower or3190 * zero power reduction. When FW transmits agg with a rate3191 * different from the initial rate, it will not use reduced txp3192 * and will send BA notification twice (one empty with reduced3193 * txp equal to the value from LQ and one with reduced txp 0).3194 * We need to update counters for each txp level accordingly.3195 */3196 if (info->status.ampdu_ack_len == 0)3197 info->status.ampdu_len = 1;3198 3199 rs_collect_tlc_data(mvm, mvmsta, tid, curr_tbl,3200 tx_resp_rate.index,3201 info->status.ampdu_len,3202 info->status.ampdu_ack_len);3203 3204 /* Update success/fail counts if not searching for new mode */3205 if (lq_sta->rs_state == RS_STATE_STAY_IN_COLUMN) {3206 lq_sta->total_success += info->status.ampdu_ack_len;3207 lq_sta->total_failed += (info->status.ampdu_len -3208 info->status.ampdu_ack_len);3209 }3210 } else {3211 /* For legacy, update frame history with for each Tx retry. */3212 retries = info->status.rates[0].count - 1;3213 /* HW doesn't send more than 15 retries */3214 retries = min(retries, 15);3215 3216 /* The last transmission may have been successful */3217 legacy_success = !!(info->flags & IEEE80211_TX_STAT_ACK);3218 /* Collect data for each rate used during failed TX attempts */3219 for (i = 0; i <= retries; ++i) {3220 lq_hwrate = le32_to_cpu(table->rs_table[i]);3221 if (rs_rate_from_ucode_rate(lq_hwrate, info->band,3222 &lq_rate)) {3223 WARN_ON_ONCE(1);3224 return;3225 }3226 3227 /* Only collect stats if retried rate is in the same RS3228 * table as active/search.3229 */3230 if (rs_rate_column_match(&lq_rate, &curr_tbl->rate))3231 tmp_tbl = curr_tbl;3232 else if (rs_rate_column_match(&lq_rate,3233 &other_tbl->rate))3234 tmp_tbl = other_tbl;3235 else3236 continue;3237 3238 rs_collect_tpc_data(mvm, lq_sta, tmp_tbl,3239 tx_resp_rate.index, 1,3240 i < retries ? 0 : legacy_success,3241 reduced_txp);3242 rs_collect_tlc_data(mvm, mvmsta, tid, tmp_tbl,3243 tx_resp_rate.index, 1,3244 i < retries ? 0 : legacy_success);3245 }3246 3247 /* Update success/fail counts if not searching for new mode */3248 if (lq_sta->rs_state == RS_STATE_STAY_IN_COLUMN) {3249 lq_sta->total_success += legacy_success;3250 lq_sta->total_failed += retries + (1 - legacy_success);3251 }3252 }3253 /* The last TX rate is cached in lq_sta; it's set in if/else above */3254 lq_sta->last_rate_n_flags = lq_hwrate;3255 IWL_DEBUG_RATE(mvm, "reduced txpower: %d\n", reduced_txp);3256done:3257 /* See if there's a better rate or modulation mode to try. */3258 if (sta->deflink.supp_rates[info->band])3259 rs_rate_scale_perform(mvm, sta, lq_sta, tid, ndp);3260}3261 3262void iwl_mvm_rs_tx_status(struct iwl_mvm *mvm, struct ieee80211_sta *sta,3263 int tid, struct ieee80211_tx_info *info, bool ndp)3264{3265 struct iwl_mvm_sta *mvmsta = iwl_mvm_sta_from_mac80211(sta);3266 3267 /* If it's locked we are in middle of init flow3268 * just wait for next tx status to update the lq_sta data3269 */3270 if (!spin_trylock_bh(&mvmsta->deflink.lq_sta.rs_drv.pers.lock))3271 return;3272 3273 __iwl_mvm_rs_tx_status(mvm, sta, tid, info, ndp);3274 spin_unlock_bh(&mvmsta->deflink.lq_sta.rs_drv.pers.lock);3275}3276 3277#ifdef CONFIG_MAC80211_DEBUGFS3278static void rs_build_rates_table_from_fixed(struct iwl_mvm *mvm,3279 struct iwl_lq_cmd *lq_cmd,3280 enum nl80211_band band,3281 u32 ucode_rate)3282{3283 struct rs_rate rate;3284 int i;3285 int num_rates = ARRAY_SIZE(lq_cmd->rs_table);3286 __le32 ucode_rate_le32 = cpu_to_le32(ucode_rate);3287 u8 ant = (ucode_rate & RATE_MCS_ANT_AB_MSK) >> RATE_MCS_ANT_POS;3288 3289 for (i = 0; i < num_rates; i++)3290 lq_cmd->rs_table[i] = ucode_rate_le32;3291 3292 if (rs_rate_from_ucode_rate(ucode_rate, band, &rate)) {3293 WARN_ON_ONCE(1);3294 return;3295 }3296 3297 if (is_mimo(&rate))3298 lq_cmd->mimo_delim = num_rates - 1;3299 else3300 lq_cmd->mimo_delim = 0;3301 3302 lq_cmd->reduced_tpc = 0;3303 3304 if (num_of_ant(ant) == 1)3305 lq_cmd->single_stream_ant_msk = ant;3306 3307 if (!mvm->trans->trans_cfg->gen2)3308 lq_cmd->agg_frame_cnt_limit = LINK_QUAL_AGG_FRAME_LIMIT_DEF;3309 else3310 lq_cmd->agg_frame_cnt_limit =3311 LINK_QUAL_AGG_FRAME_LIMIT_GEN2_DEF;3312}3313#endif /* CONFIG_MAC80211_DEBUGFS */3314 3315static void rs_fill_rates_for_column(struct iwl_mvm *mvm,3316 struct iwl_lq_sta *lq_sta,3317 struct rs_rate *rate,3318 __le32 *rs_table, int *rs_table_index,3319 int num_rates, int num_retries,3320 u8 valid_tx_ant, bool toggle_ant)3321{3322 int i, j;3323 __le32 ucode_rate;3324 bool bottom_reached = false;3325 int prev_rate_idx = rate->index;3326 int end = LINK_QUAL_MAX_RETRY_NUM;3327 int index = *rs_table_index;3328 3329 for (i = 0; i < num_rates && index < end; i++) {3330 for (j = 0; j < num_retries && index < end; j++, index++) {3331 ucode_rate = cpu_to_le32(ucode_rate_from_rs_rate(mvm,3332 rate));3333 rs_table[index] = ucode_rate;3334 if (toggle_ant)3335 rs_toggle_antenna(valid_tx_ant, rate);3336 }3337 3338 prev_rate_idx = rate->index;3339 bottom_reached = rs_get_lower_rate_in_column(lq_sta, rate);3340 if (bottom_reached && !is_legacy(rate))3341 break;3342 }3343 3344 if (!bottom_reached && !is_legacy(rate))3345 rate->index = prev_rate_idx;3346 3347 *rs_table_index = index;3348}3349 3350/* Building the rate table is non trivial. When we're in MIMO2/VHT/80Mhz/SGI3351 * column the rate table should look like this:3352 *3353 * rate[0] 0x400F019 VHT | ANT: AB BW: 80Mhz MCS: 9 NSS: 2 SGI3354 * rate[1] 0x400F019 VHT | ANT: AB BW: 80Mhz MCS: 9 NSS: 2 SGI3355 * rate[2] 0x400F018 VHT | ANT: AB BW: 80Mhz MCS: 8 NSS: 2 SGI3356 * rate[3] 0x400F018 VHT | ANT: AB BW: 80Mhz MCS: 8 NSS: 2 SGI3357 * rate[4] 0x400F017 VHT | ANT: AB BW: 80Mhz MCS: 7 NSS: 2 SGI3358 * rate[5] 0x400F017 VHT | ANT: AB BW: 80Mhz MCS: 7 NSS: 2 SGI3359 * rate[6] 0x4005007 VHT | ANT: A BW: 80Mhz MCS: 7 NSS: 1 NGI3360 * rate[7] 0x4009006 VHT | ANT: B BW: 80Mhz MCS: 6 NSS: 1 NGI3361 * rate[8] 0x4005005 VHT | ANT: A BW: 80Mhz MCS: 5 NSS: 1 NGI3362 * rate[9] 0x800B Legacy | ANT: B Rate: 36 Mbps3363 * rate[10] 0x4009 Legacy | ANT: A Rate: 24 Mbps3364 * rate[11] 0x8007 Legacy | ANT: B Rate: 18 Mbps3365 * rate[12] 0x4005 Legacy | ANT: A Rate: 12 Mbps3366 * rate[13] 0x800F Legacy | ANT: B Rate: 9 Mbps3367 * rate[14] 0x400D Legacy | ANT: A Rate: 6 Mbps3368 * rate[15] 0x800D Legacy | ANT: B Rate: 6 Mbps3369 */3370static void rs_build_rates_table(struct iwl_mvm *mvm,3371 struct ieee80211_sta *sta,3372 struct iwl_lq_sta *lq_sta,3373 const struct rs_rate *initial_rate)3374{3375 struct rs_rate rate;3376 int num_rates, num_retries, index = 0;3377 u8 valid_tx_ant = 0;3378 struct iwl_lq_cmd *lq_cmd = &lq_sta->lq;3379 bool toggle_ant = false;3380 u32 color;3381 3382 memcpy(&rate, initial_rate, sizeof(rate));3383 3384 valid_tx_ant = iwl_mvm_get_valid_tx_ant(mvm);3385 3386 /* TODO: remove old API when min FW API hits 14 */3387 if (!fw_has_api(&mvm->fw->ucode_capa, IWL_UCODE_TLV_API_LQ_SS_PARAMS) &&3388 rs_stbc_allow(mvm, sta, lq_sta))3389 rate.stbc = true;3390 3391 if (is_siso(&rate)) {3392 num_rates = IWL_MVM_RS_INITIAL_SISO_NUM_RATES;3393 num_retries = IWL_MVM_RS_HT_VHT_RETRIES_PER_RATE;3394 } else if (is_mimo(&rate)) {3395 num_rates = IWL_MVM_RS_INITIAL_MIMO_NUM_RATES;3396 num_retries = IWL_MVM_RS_HT_VHT_RETRIES_PER_RATE;3397 } else {3398 num_rates = IWL_MVM_RS_INITIAL_LEGACY_NUM_RATES;3399 num_retries = IWL_MVM_RS_INITIAL_LEGACY_RETRIES;3400 toggle_ant = true;3401 }3402 3403 rs_fill_rates_for_column(mvm, lq_sta, &rate, lq_cmd->rs_table, &index,3404 num_rates, num_retries, valid_tx_ant,3405 toggle_ant);3406 3407 rs_get_lower_rate_down_column(lq_sta, &rate);3408 3409 if (is_siso(&rate)) {3410 num_rates = IWL_MVM_RS_SECONDARY_SISO_NUM_RATES;3411 num_retries = IWL_MVM_RS_SECONDARY_SISO_RETRIES;3412 lq_cmd->mimo_delim = index;3413 } else if (is_legacy(&rate)) {3414 num_rates = IWL_MVM_RS_SECONDARY_LEGACY_NUM_RATES;3415 num_retries = IWL_MVM_RS_SECONDARY_LEGACY_RETRIES;3416 } else {3417 WARN_ON_ONCE(1);3418 }3419 3420 toggle_ant = true;3421 3422 rs_fill_rates_for_column(mvm, lq_sta, &rate, lq_cmd->rs_table, &index,3423 num_rates, num_retries, valid_tx_ant,3424 toggle_ant);3425 3426 rs_get_lower_rate_down_column(lq_sta, &rate);3427 3428 num_rates = IWL_MVM_RS_SECONDARY_LEGACY_NUM_RATES;3429 num_retries = IWL_MVM_RS_SECONDARY_LEGACY_RETRIES;3430 3431 rs_fill_rates_for_column(mvm, lq_sta, &rate, lq_cmd->rs_table, &index,3432 num_rates, num_retries, valid_tx_ant,3433 toggle_ant);3434 3435 /* update the color of the LQ command (as a counter at bits 1-3) */3436 color = LQ_FLAGS_COLOR_INC(LQ_FLAG_COLOR_GET(lq_cmd->flags));3437 lq_cmd->flags = LQ_FLAG_COLOR_SET(lq_cmd->flags, color);3438}3439 3440struct rs_bfer_active_iter_data {3441 struct ieee80211_sta *exclude_sta;3442 struct iwl_mvm_sta *bfer_mvmsta;3443};3444 3445static void rs_bfer_active_iter(void *_data,3446 struct ieee80211_sta *sta)3447{3448 struct rs_bfer_active_iter_data *data = _data;3449 struct iwl_mvm_sta *mvmsta = iwl_mvm_sta_from_mac80211(sta);3450 struct iwl_lq_cmd *lq_cmd = &mvmsta->deflink.lq_sta.rs_drv.lq;3451 u32 ss_params = le32_to_cpu(lq_cmd->ss_params);3452 3453 if (sta == data->exclude_sta)3454 return;3455 3456 /* The current sta has BFER allowed */3457 if (ss_params & LQ_SS_BFER_ALLOWED) {3458 WARN_ON_ONCE(data->bfer_mvmsta != NULL);3459 3460 data->bfer_mvmsta = mvmsta;3461 }3462}3463 3464static int rs_bfer_priority(struct iwl_mvm_sta *sta)3465{3466 int prio = -1;3467 enum nl80211_iftype viftype = ieee80211_vif_type_p2p(sta->vif);3468 3469 switch (viftype) {3470 case NL80211_IFTYPE_AP:3471 case NL80211_IFTYPE_P2P_GO:3472 prio = 3;3473 break;3474 case NL80211_IFTYPE_P2P_CLIENT:3475 prio = 2;3476 break;3477 case NL80211_IFTYPE_STATION:3478 prio = 1;3479 break;3480 default:3481 WARN_ONCE(true, "viftype %d sta_id %d", viftype,3482 sta->deflink.sta_id);3483 prio = -1;3484 }3485 3486 return prio;3487}3488 3489/* Returns >0 if sta1 has a higher BFER priority compared to sta2 */3490static int rs_bfer_priority_cmp(struct iwl_mvm_sta *sta1,3491 struct iwl_mvm_sta *sta2)3492{3493 int prio1 = rs_bfer_priority(sta1);3494 int prio2 = rs_bfer_priority(sta2);3495 3496 if (prio1 > prio2)3497 return 1;3498 if (prio1 < prio2)3499 return -1;3500 return 0;3501}3502 3503static void rs_set_lq_ss_params(struct iwl_mvm *mvm,3504 struct ieee80211_sta *sta,3505 struct iwl_lq_sta *lq_sta,3506 const struct rs_rate *initial_rate)3507{3508 struct iwl_lq_cmd *lq_cmd = &lq_sta->lq;3509 struct iwl_mvm_sta *mvmsta = iwl_mvm_sta_from_mac80211(sta);3510 struct rs_bfer_active_iter_data data = {3511 .exclude_sta = sta,3512 .bfer_mvmsta = NULL,3513 };3514 struct iwl_mvm_sta *bfer_mvmsta = NULL;3515 u32 ss_params = LQ_SS_PARAMS_VALID;3516 3517 if (!iwl_mvm_bt_coex_is_mimo_allowed(mvm, sta))3518 goto out;3519 3520#ifdef CONFIG_MAC80211_DEBUGFS3521 /* Check if forcing the decision is configured.3522 * Note that SISO is forced by not allowing STBC or BFER3523 */3524 if (lq_sta->pers.ss_force == RS_SS_FORCE_STBC)3525 ss_params |= (LQ_SS_STBC_1SS_ALLOWED | LQ_SS_FORCE);3526 else if (lq_sta->pers.ss_force == RS_SS_FORCE_BFER)3527 ss_params |= (LQ_SS_BFER_ALLOWED | LQ_SS_FORCE);3528 3529 if (lq_sta->pers.ss_force != RS_SS_FORCE_NONE) {3530 IWL_DEBUG_RATE(mvm, "Forcing single stream Tx decision %d\n",3531 lq_sta->pers.ss_force);3532 goto out;3533 }3534#endif3535 3536 if (lq_sta->stbc_capable)3537 ss_params |= LQ_SS_STBC_1SS_ALLOWED;3538 3539 if (!lq_sta->bfer_capable)3540 goto out;3541 3542 ieee80211_iterate_stations_atomic(mvm->hw,3543 rs_bfer_active_iter,3544 &data);3545 bfer_mvmsta = data.bfer_mvmsta;3546 3547 /* This code is safe as it doesn't run concurrently for different3548 * stations. This is guaranteed by the fact that calls to3549 * ieee80211_tx_status wouldn't run concurrently for a single HW.3550 */3551 if (!bfer_mvmsta) {3552 IWL_DEBUG_RATE(mvm, "No sta with BFER allowed found. Allow\n");3553 3554 ss_params |= LQ_SS_BFER_ALLOWED;3555 goto out;3556 }3557 3558 IWL_DEBUG_RATE(mvm, "Found existing sta %d with BFER activated\n",3559 bfer_mvmsta->deflink.sta_id);3560 3561 /* Disallow BFER on another STA if active and we're a higher priority */3562 if (rs_bfer_priority_cmp(mvmsta, bfer_mvmsta) > 0) {3563 struct iwl_lq_cmd *bfersta_lq_cmd =3564 &bfer_mvmsta->deflink.lq_sta.rs_drv.lq;3565 u32 bfersta_ss_params = le32_to_cpu(bfersta_lq_cmd->ss_params);3566 3567 bfersta_ss_params &= ~LQ_SS_BFER_ALLOWED;3568 bfersta_lq_cmd->ss_params = cpu_to_le32(bfersta_ss_params);3569 iwl_mvm_send_lq_cmd(mvm, bfersta_lq_cmd);3570 3571 ss_params |= LQ_SS_BFER_ALLOWED;3572 IWL_DEBUG_RATE(mvm,3573 "Lower priority BFER sta found (%d). Switch BFER\n",3574 bfer_mvmsta->deflink.sta_id);3575 }3576out:3577 lq_cmd->ss_params = cpu_to_le32(ss_params);3578}3579 3580static void rs_fill_lq_cmd(struct iwl_mvm *mvm,3581 struct ieee80211_sta *sta,3582 struct iwl_lq_sta *lq_sta,3583 const struct rs_rate *initial_rate)3584{3585 struct iwl_lq_cmd *lq_cmd = &lq_sta->lq;3586 struct iwl_mvm_sta *mvmsta;3587 struct iwl_mvm_vif *mvmvif;3588 3589 lq_cmd->agg_disable_start_th = IWL_MVM_RS_AGG_DISABLE_START;3590 lq_cmd->agg_time_limit =3591 cpu_to_le16(IWL_MVM_RS_AGG_TIME_LIMIT);3592 3593#ifdef CONFIG_MAC80211_DEBUGFS3594 if (lq_sta->pers.dbg_fixed_rate) {3595 rs_build_rates_table_from_fixed(mvm, lq_cmd,3596 lq_sta->band,3597 lq_sta->pers.dbg_fixed_rate);3598 return;3599 }3600#endif3601 if (WARN_ON_ONCE(!sta || !initial_rate))3602 return;3603 3604 rs_build_rates_table(mvm, sta, lq_sta, initial_rate);3605 3606 if (fw_has_api(&mvm->fw->ucode_capa, IWL_UCODE_TLV_API_LQ_SS_PARAMS))3607 rs_set_lq_ss_params(mvm, sta, lq_sta, initial_rate);3608 3609 mvmsta = iwl_mvm_sta_from_mac80211(sta);3610 mvmvif = iwl_mvm_vif_from_mac80211(mvmsta->vif);3611 3612 if (!fw_has_capa(&mvm->fw->ucode_capa, IWL_UCODE_TLV_CAPA_COEX_SCHEMA_2) &&3613 num_of_ant(initial_rate->ant) == 1)3614 lq_cmd->single_stream_ant_msk = initial_rate->ant;3615 3616 lq_cmd->agg_frame_cnt_limit = lq_sta->pers.max_agg_bufsize;3617 3618 /*3619 * In case of low latency, tell the firmware to leave a frame in the3620 * Tx Fifo so that it can start a transaction in the same TxOP. This3621 * basically allows the firmware to send bursts.3622 */3623 if (iwl_mvm_vif_low_latency(mvmvif))3624 lq_cmd->agg_frame_cnt_limit--;3625 3626 if (mvmsta->vif->p2p)3627 lq_cmd->flags |= LQ_FLAG_USE_RTS_MSK;3628 3629 lq_cmd->agg_time_limit =3630 cpu_to_le16(iwl_mvm_coex_agg_time_limit(mvm, sta));3631}3632 3633static void *rs_alloc(struct ieee80211_hw *hw)3634{3635 return hw->priv;3636}3637 3638/* rate scale requires free function to be implemented */3639static void rs_free(void *mvm_rate)3640{3641 return;3642}3643 3644static void rs_free_sta(void *mvm_r, struct ieee80211_sta *sta, void *mvm_sta)3645{3646 struct iwl_op_mode *op_mode __maybe_unused = mvm_r;3647 struct iwl_mvm *mvm __maybe_unused = IWL_OP_MODE_GET_MVM(op_mode);3648 3649 IWL_DEBUG_RATE(mvm, "enter\n");3650 IWL_DEBUG_RATE(mvm, "leave\n");3651}3652 3653int rs_pretty_print_rate_v1(char *buf, int bufsz, const u32 rate)3654{3655 3656 char *type;3657 u8 mcs = 0, nss = 0;3658 u8 ant = (rate & RATE_MCS_ANT_AB_MSK) >> RATE_MCS_ANT_POS;3659 u32 bw = (rate & RATE_MCS_CHAN_WIDTH_MSK_V1) >>3660 RATE_MCS_CHAN_WIDTH_POS;3661 3662 if (!(rate & RATE_MCS_HT_MSK_V1) &&3663 !(rate & RATE_MCS_VHT_MSK_V1) &&3664 !(rate & RATE_MCS_HE_MSK_V1)) {3665 int index = iwl_hwrate_to_plcp_idx(rate);3666 3667 return scnprintf(buf, bufsz, "Legacy | ANT: %s Rate: %s Mbps",3668 iwl_rs_pretty_ant(ant),3669 index == IWL_RATE_INVALID ? "BAD" :3670 iwl_rate_mcs(index)->mbps);3671 }3672 3673 if (rate & RATE_MCS_VHT_MSK_V1) {3674 type = "VHT";3675 mcs = rate & RATE_VHT_MCS_RATE_CODE_MSK;3676 nss = FIELD_GET(RATE_MCS_NSS_MSK, rate) + 1;3677 } else if (rate & RATE_MCS_HT_MSK_V1) {3678 type = "HT";3679 mcs = rate & RATE_HT_MCS_INDEX_MSK_V1;3680 nss = ((rate & RATE_HT_MCS_NSS_MSK_V1)3681 >> RATE_HT_MCS_NSS_POS_V1) + 1;3682 } else if (rate & RATE_MCS_HE_MSK_V1) {3683 type = "HE";3684 mcs = rate & RATE_VHT_MCS_RATE_CODE_MSK;3685 nss = FIELD_GET(RATE_MCS_NSS_MSK, rate) + 1;3686 } else {3687 type = "Unknown"; /* shouldn't happen */3688 }3689 3690 return scnprintf(buf, bufsz,3691 "0x%x: %s | ANT: %s BW: %s MCS: %d NSS: %d %s%s%s%s%s",3692 rate, type, iwl_rs_pretty_ant(ant), iwl_rs_pretty_bw(bw), mcs, nss,3693 (rate & RATE_MCS_SGI_MSK_V1) ? "SGI " : "NGI ",3694 (rate & RATE_MCS_STBC_MSK) ? "STBC " : "",3695 (rate & RATE_MCS_LDPC_MSK_V1) ? "LDPC " : "",3696 (rate & RATE_HE_DUAL_CARRIER_MODE_MSK) ? "DCM " : "",3697 (rate & RATE_MCS_BF_MSK) ? "BF " : "");3698}3699 3700#ifdef CONFIG_MAC80211_DEBUGFS3701/*3702 * Program the device to use fixed rate for frame transmit3703 * This is for debugging/testing only3704 * once the device start use fixed rate, we need to reload the module3705 * to being back the normal operation.3706 */3707static void rs_program_fix_rate(struct iwl_mvm *mvm,3708 struct iwl_lq_sta *lq_sta)3709{3710 lq_sta->active_legacy_rate = 0x0FFF; /* 1 - 54 MBits, includes CCK */3711 lq_sta->active_siso_rate = 0x1FD0; /* 6 - 60 MBits, no 9, no CCK */3712 lq_sta->active_mimo2_rate = 0x1FD0; /* 6 - 60 MBits, no 9, no CCK */3713 3714 IWL_DEBUG_RATE(mvm, "sta_id %d rate 0x%X\n",3715 lq_sta->lq.sta_id, lq_sta->pers.dbg_fixed_rate);3716 3717 if (lq_sta->pers.dbg_fixed_rate) {3718 rs_fill_lq_cmd(mvm, NULL, lq_sta, NULL);3719 iwl_mvm_send_lq_cmd(lq_sta->pers.drv, &lq_sta->lq);3720 }3721}3722 3723static ssize_t rs_sta_dbgfs_scale_table_write(struct file *file,3724 const char __user *user_buf, size_t count, loff_t *ppos)3725{3726 struct iwl_lq_sta *lq_sta = file->private_data;3727 struct iwl_mvm *mvm;3728 char buf[64];3729 size_t buf_size;3730 u32 parsed_rate;3731 3732 mvm = lq_sta->pers.drv;3733 memset(buf, 0, sizeof(buf));3734 buf_size = min(count, sizeof(buf) - 1);3735 if (copy_from_user(buf, user_buf, buf_size))3736 return -EFAULT;3737 3738 if (sscanf(buf, "%x", &parsed_rate) == 1)3739 lq_sta->pers.dbg_fixed_rate = parsed_rate;3740 else3741 lq_sta->pers.dbg_fixed_rate = 0;3742 3743 rs_program_fix_rate(mvm, lq_sta);3744 3745 return count;3746}3747 3748static ssize_t rs_sta_dbgfs_scale_table_read(struct file *file,3749 char __user *user_buf, size_t count, loff_t *ppos)3750{3751 char *buff;3752 int desc = 0;3753 int i = 0;3754 ssize_t ret;3755 static const size_t bufsz = 2048;3756 3757 struct iwl_lq_sta *lq_sta = file->private_data;3758 struct iwl_mvm_sta *mvmsta =3759 container_of(lq_sta, struct iwl_mvm_sta, deflink.lq_sta.rs_drv);3760 struct iwl_mvm *mvm;3761 struct iwl_scale_tbl_info *tbl = &(lq_sta->lq_info[lq_sta->active_tbl]);3762 struct rs_rate *rate = &tbl->rate;3763 u32 ss_params;3764 3765 mvm = lq_sta->pers.drv;3766 buff = kmalloc(bufsz, GFP_KERNEL);3767 if (!buff)3768 return -ENOMEM;3769 3770 desc += scnprintf(buff + desc, bufsz - desc,3771 "sta_id %d\n", lq_sta->lq.sta_id);3772 desc += scnprintf(buff + desc, bufsz - desc,3773 "failed=%d success=%d rate=0%lX\n",3774 lq_sta->total_failed, lq_sta->total_success,3775 lq_sta->active_legacy_rate);3776 desc += scnprintf(buff + desc, bufsz - desc, "fixed rate 0x%X\n",3777 lq_sta->pers.dbg_fixed_rate);3778 desc += scnprintf(buff + desc, bufsz - desc, "valid_tx_ant %s%s\n",3779 (iwl_mvm_get_valid_tx_ant(mvm) & ANT_A) ? "ANT_A," : "",3780 (iwl_mvm_get_valid_tx_ant(mvm) & ANT_B) ? "ANT_B," : "");3781 desc += scnprintf(buff + desc, bufsz - desc, "lq type %s\n",3782 (is_legacy(rate)) ? "legacy" :3783 is_vht(rate) ? "VHT" : "HT");3784 if (!is_legacy(rate)) {3785 desc += scnprintf(buff + desc, bufsz - desc, " %s",3786 (is_siso(rate)) ? "SISO" : "MIMO2");3787 desc += scnprintf(buff + desc, bufsz - desc, " %s",3788 (is_ht20(rate)) ? "20MHz" :3789 (is_ht40(rate)) ? "40MHz" :3790 (is_ht80(rate)) ? "80MHz" :3791 (is_ht160(rate)) ? "160MHz" : "BAD BW");3792 desc += scnprintf(buff + desc, bufsz - desc, " %s %s %s %s\n",3793 (rate->sgi) ? "SGI" : "NGI",3794 (rate->ldpc) ? "LDPC" : "BCC",3795 (lq_sta->is_agg) ? "AGG on" : "",3796 (mvmsta->amsdu_enabled) ? "AMSDU on" : "");3797 }3798 desc += scnprintf(buff + desc, bufsz - desc, "last tx rate=0x%X\n",3799 lq_sta->last_rate_n_flags);3800 desc += scnprintf(buff + desc, bufsz - desc,3801 "general: flags=0x%X mimo-d=%d s-ant=0x%x d-ant=0x%x\n",3802 lq_sta->lq.flags,3803 lq_sta->lq.mimo_delim,3804 lq_sta->lq.single_stream_ant_msk,3805 lq_sta->lq.dual_stream_ant_msk);3806 3807 desc += scnprintf(buff + desc, bufsz - desc,3808 "agg: time_limit=%d dist_start_th=%d frame_cnt_limit=%d\n",3809 le16_to_cpu(lq_sta->lq.agg_time_limit),3810 lq_sta->lq.agg_disable_start_th,3811 lq_sta->lq.agg_frame_cnt_limit);3812 3813 desc += scnprintf(buff + desc, bufsz - desc, "reduced tpc=%d\n",3814 lq_sta->lq.reduced_tpc);3815 ss_params = le32_to_cpu(lq_sta->lq.ss_params);3816 desc += scnprintf(buff + desc, bufsz - desc,3817 "single stream params: %s%s%s%s\n",3818 (ss_params & LQ_SS_PARAMS_VALID) ?3819 "VALID" : "INVALID",3820 (ss_params & LQ_SS_BFER_ALLOWED) ?3821 ", BFER" : "",3822 (ss_params & LQ_SS_STBC_1SS_ALLOWED) ?3823 ", STBC" : "",3824 (ss_params & LQ_SS_FORCE) ?3825 ", FORCE" : "");3826 desc += scnprintf(buff + desc, bufsz - desc,3827 "Start idx [0]=0x%x [1]=0x%x [2]=0x%x [3]=0x%x\n",3828 lq_sta->lq.initial_rate_index[0],3829 lq_sta->lq.initial_rate_index[1],3830 lq_sta->lq.initial_rate_index[2],3831 lq_sta->lq.initial_rate_index[3]);3832 3833 for (i = 0; i < LINK_QUAL_MAX_RETRY_NUM; i++) {3834 u32 r = le32_to_cpu(lq_sta->lq.rs_table[i]);3835 3836 desc += scnprintf(buff + desc, bufsz - desc,3837 " rate[%d] 0x%X ", i, r);3838 desc += rs_pretty_print_rate_v1(buff + desc, bufsz - desc, r);3839 if (desc < bufsz - 1)3840 buff[desc++] = '\n';3841 }3842 3843 ret = simple_read_from_buffer(user_buf, count, ppos, buff, desc);3844 kfree(buff);3845 return ret;3846}3847 3848static const struct file_operations rs_sta_dbgfs_scale_table_ops = {3849 .write = rs_sta_dbgfs_scale_table_write,3850 .read = rs_sta_dbgfs_scale_table_read,3851 .open = simple_open,3852 .llseek = default_llseek,3853};3854static ssize_t rs_sta_dbgfs_stats_table_read(struct file *file,3855 char __user *user_buf, size_t count, loff_t *ppos)3856{3857 char *buff;3858 int desc = 0;3859 int i, j;3860 ssize_t ret;3861 struct iwl_scale_tbl_info *tbl;3862 struct rs_rate *rate;3863 struct iwl_lq_sta *lq_sta = file->private_data;3864 3865 buff = kmalloc(1024, GFP_KERNEL);3866 if (!buff)3867 return -ENOMEM;3868 3869 for (i = 0; i < LQ_SIZE; i++) {3870 tbl = &(lq_sta->lq_info[i]);3871 rate = &tbl->rate;3872 desc += sprintf(buff+desc,3873 "%s type=%d SGI=%d BW=%s DUP=0\n"3874 "index=%d\n",3875 lq_sta->active_tbl == i ? "*" : "x",3876 rate->type,3877 rate->sgi,3878 is_ht20(rate) ? "20MHz" :3879 is_ht40(rate) ? "40MHz" :3880 is_ht80(rate) ? "80MHz" :3881 is_ht160(rate) ? "160MHz" : "ERR",3882 rate->index);3883 for (j = 0; j < IWL_RATE_COUNT; j++) {3884 desc += sprintf(buff+desc,3885 "counter=%d success=%d %%=%d\n",3886 tbl->win[j].counter,3887 tbl->win[j].success_counter,3888 tbl->win[j].success_ratio);3889 }3890 }3891 ret = simple_read_from_buffer(user_buf, count, ppos, buff, desc);3892 kfree(buff);3893 return ret;3894}3895 3896static const struct file_operations rs_sta_dbgfs_stats_table_ops = {3897 .read = rs_sta_dbgfs_stats_table_read,3898 .open = simple_open,3899 .llseek = default_llseek,3900};3901 3902static ssize_t rs_sta_dbgfs_drv_tx_stats_read(struct file *file,3903 char __user *user_buf,3904 size_t count, loff_t *ppos)3905{3906 static const char * const column_name[] = {3907 [RS_COLUMN_LEGACY_ANT_A] = "LEGACY_ANT_A",3908 [RS_COLUMN_LEGACY_ANT_B] = "LEGACY_ANT_B",3909 [RS_COLUMN_SISO_ANT_A] = "SISO_ANT_A",3910 [RS_COLUMN_SISO_ANT_B] = "SISO_ANT_B",3911 [RS_COLUMN_SISO_ANT_A_SGI] = "SISO_ANT_A_SGI",3912 [RS_COLUMN_SISO_ANT_B_SGI] = "SISO_ANT_B_SGI",3913 [RS_COLUMN_MIMO2] = "MIMO2",3914 [RS_COLUMN_MIMO2_SGI] = "MIMO2_SGI",3915 };3916 3917 static const char * const rate_name[] = {3918 [IWL_RATE_1M_INDEX] = "1M",3919 [IWL_RATE_2M_INDEX] = "2M",3920 [IWL_RATE_5M_INDEX] = "5.5M",3921 [IWL_RATE_11M_INDEX] = "11M",3922 [IWL_RATE_6M_INDEX] = "6M|MCS0",3923 [IWL_RATE_9M_INDEX] = "9M",3924 [IWL_RATE_12M_INDEX] = "12M|MCS1",3925 [IWL_RATE_18M_INDEX] = "18M|MCS2",3926 [IWL_RATE_24M_INDEX] = "24M|MCS3",3927 [IWL_RATE_36M_INDEX] = "36M|MCS4",3928 [IWL_RATE_48M_INDEX] = "48M|MCS5",3929 [IWL_RATE_54M_INDEX] = "54M|MCS6",3930 [IWL_RATE_MCS_7_INDEX] = "MCS7",3931 [IWL_RATE_MCS_8_INDEX] = "MCS8",3932 [IWL_RATE_MCS_9_INDEX] = "MCS9",3933 [IWL_RATE_MCS_10_INDEX] = "MCS10",3934 [IWL_RATE_MCS_11_INDEX] = "MCS11",3935 };3936 3937 char *buff, *pos, *endpos;3938 int col, rate;3939 ssize_t ret;3940 struct iwl_lq_sta *lq_sta = file->private_data;3941 struct rs_rate_stats *stats;3942 static const size_t bufsz = 1024;3943 3944 buff = kmalloc(bufsz, GFP_KERNEL);3945 if (!buff)3946 return -ENOMEM;3947 3948 pos = buff;3949 endpos = pos + bufsz;3950 3951 pos += scnprintf(pos, endpos - pos, "COLUMN,");3952 for (rate = 0; rate < IWL_RATE_COUNT; rate++)3953 pos += scnprintf(pos, endpos - pos, "%s,", rate_name[rate]);3954 pos += scnprintf(pos, endpos - pos, "\n");3955 3956 for (col = 0; col < RS_COLUMN_COUNT; col++) {3957 pos += scnprintf(pos, endpos - pos,3958 "%s,", column_name[col]);3959 3960 for (rate = 0; rate < IWL_RATE_COUNT; rate++) {3961 stats = &(lq_sta->pers.tx_stats[col][rate]);3962 pos += scnprintf(pos, endpos - pos,3963 "%llu/%llu,",3964 stats->success,3965 stats->total);3966 }3967 pos += scnprintf(pos, endpos - pos, "\n");3968 }3969 3970 ret = simple_read_from_buffer(user_buf, count, ppos, buff, pos - buff);3971 kfree(buff);3972 return ret;3973}3974 3975static ssize_t rs_sta_dbgfs_drv_tx_stats_write(struct file *file,3976 const char __user *user_buf,3977 size_t count, loff_t *ppos)3978{3979 struct iwl_lq_sta *lq_sta = file->private_data;3980 memset(lq_sta->pers.tx_stats, 0, sizeof(lq_sta->pers.tx_stats));3981 3982 return count;3983}3984 3985static const struct file_operations rs_sta_dbgfs_drv_tx_stats_ops = {3986 .read = rs_sta_dbgfs_drv_tx_stats_read,3987 .write = rs_sta_dbgfs_drv_tx_stats_write,3988 .open = simple_open,3989 .llseek = default_llseek,3990};3991 3992static ssize_t iwl_dbgfs_ss_force_read(struct file *file,3993 char __user *user_buf,3994 size_t count, loff_t *ppos)3995{3996 struct iwl_lq_sta *lq_sta = file->private_data;3997 char buf[12];3998 int bufsz = sizeof(buf);3999 int pos = 0;4000 static const char * const ss_force_name[] = {4001 [RS_SS_FORCE_NONE] = "none",4002 [RS_SS_FORCE_STBC] = "stbc",4003 [RS_SS_FORCE_BFER] = "bfer",4004 [RS_SS_FORCE_SISO] = "siso",4005 };4006 4007 pos += scnprintf(buf+pos, bufsz-pos, "%s\n",4008 ss_force_name[lq_sta->pers.ss_force]);4009 return simple_read_from_buffer(user_buf, count, ppos, buf, pos);4010}4011 4012static ssize_t iwl_dbgfs_ss_force_write(struct iwl_lq_sta *lq_sta, char *buf,4013 size_t count, loff_t *ppos)4014{4015 struct iwl_mvm *mvm = lq_sta->pers.drv;4016 int ret = 0;4017 4018 if (!strncmp("none", buf, 4)) {4019 lq_sta->pers.ss_force = RS_SS_FORCE_NONE;4020 } else if (!strncmp("siso", buf, 4)) {4021 lq_sta->pers.ss_force = RS_SS_FORCE_SISO;4022 } else if (!strncmp("stbc", buf, 4)) {4023 if (lq_sta->stbc_capable) {4024 lq_sta->pers.ss_force = RS_SS_FORCE_STBC;4025 } else {4026 IWL_ERR(mvm,4027 "can't force STBC. peer doesn't support\n");4028 ret = -EINVAL;4029 }4030 } else if (!strncmp("bfer", buf, 4)) {4031 if (lq_sta->bfer_capable) {4032 lq_sta->pers.ss_force = RS_SS_FORCE_BFER;4033 } else {4034 IWL_ERR(mvm,4035 "can't force BFER. peer doesn't support\n");4036 ret = -EINVAL;4037 }4038 } else {4039 IWL_ERR(mvm, "valid values none|siso|stbc|bfer\n");4040 ret = -EINVAL;4041 }4042 return ret ?: count;4043}4044 4045#define MVM_DEBUGFS_READ_WRITE_FILE_OPS(name, bufsz) \4046 _MVM_DEBUGFS_READ_WRITE_FILE_OPS(name, bufsz, struct iwl_lq_sta)4047#define MVM_DEBUGFS_ADD_FILE_RS(name, parent, mode) do { \4048 debugfs_create_file(#name, mode, parent, lq_sta, \4049 &iwl_dbgfs_##name##_ops); \4050 } while (0)4051 4052MVM_DEBUGFS_READ_WRITE_FILE_OPS(ss_force, 32);4053 4054static void rs_drv_add_sta_debugfs(void *mvm, void *priv_sta,4055 struct dentry *dir)4056{4057 struct iwl_lq_sta *lq_sta = priv_sta;4058 struct iwl_mvm_sta *mvmsta;4059 4060 mvmsta = container_of(lq_sta, struct iwl_mvm_sta,4061 deflink.lq_sta.rs_drv);4062 4063 if (!mvmsta->vif)4064 return;4065 4066 debugfs_create_file("rate_scale_table", 0600, dir,4067 lq_sta, &rs_sta_dbgfs_scale_table_ops);4068 debugfs_create_file("rate_stats_table", 0400, dir,4069 lq_sta, &rs_sta_dbgfs_stats_table_ops);4070 debugfs_create_file("drv_tx_stats", 0600, dir,4071 lq_sta, &rs_sta_dbgfs_drv_tx_stats_ops);4072 debugfs_create_u8("tx_agg_tid_enable", 0600, dir,4073 &lq_sta->tx_agg_tid_en);4074 debugfs_create_u8("reduced_tpc", 0600, dir,4075 &lq_sta->pers.dbg_fixed_txp_reduction);4076 4077 MVM_DEBUGFS_ADD_FILE_RS(ss_force, dir, 0600);4078}4079#endif4080 4081/*4082 * Initialization of rate scaling information is done by driver after4083 * the station is added. Since mac80211 calls this function before a4084 * station is added we ignore it.4085 */4086static void rs_rate_init_ops(void *mvm_r,4087 struct ieee80211_supported_band *sband,4088 struct cfg80211_chan_def *chandef,4089 struct ieee80211_sta *sta, void *mvm_sta)4090{4091}4092 4093/* ops for rate scaling implemented in the driver */4094static const struct rate_control_ops rs_mvm_ops_drv = {4095 .name = RS_NAME,4096 .tx_status = rs_drv_mac80211_tx_status,4097 .get_rate = rs_drv_get_rate,4098 .rate_init = rs_rate_init_ops,4099 .alloc = rs_alloc,4100 .free = rs_free,4101 .alloc_sta = rs_drv_alloc_sta,4102 .free_sta = rs_free_sta,4103 .rate_update = rs_drv_rate_update,4104#ifdef CONFIG_MAC80211_DEBUGFS4105 .add_sta_debugfs = rs_drv_add_sta_debugfs,4106#endif4107 .capa = RATE_CTRL_CAPA_VHT_EXT_NSS_BW,4108};4109 4110void iwl_mvm_rs_rate_init(struct iwl_mvm *mvm,4111 struct ieee80211_vif *vif,4112 struct ieee80211_sta *sta,4113 struct ieee80211_bss_conf *link_conf,4114 struct ieee80211_link_sta *link_sta,4115 enum nl80211_band band)4116{4117 if (iwl_mvm_has_tlc_offload(mvm)) {4118 iwl_mvm_rs_fw_rate_init(mvm, vif, sta, link_conf,4119 link_sta, band);4120 } else {4121 struct iwl_mvm_sta *mvmsta = iwl_mvm_sta_from_mac80211(sta);4122 4123 spin_lock_bh(&mvmsta->deflink.lq_sta.rs_drv.pers.lock);4124 rs_drv_rate_init(mvm, sta, band);4125 spin_unlock_bh(&mvmsta->deflink.lq_sta.rs_drv.pers.lock);4126 }4127}4128 4129int iwl_mvm_rate_control_register(void)4130{4131 return ieee80211_rate_control_register(&rs_mvm_ops_drv);4132}4133 4134void iwl_mvm_rate_control_unregister(void)4135{4136 ieee80211_rate_control_unregister(&rs_mvm_ops_drv);4137}4138 4139static int rs_drv_tx_protection(struct iwl_mvm *mvm, struct iwl_mvm_sta *mvmsta,4140 bool enable)4141{4142 struct iwl_lq_cmd *lq = &mvmsta->deflink.lq_sta.rs_drv.lq;4143 4144 lockdep_assert_held(&mvm->mutex);4145 4146 if (enable) {4147 if (mvmsta->tx_protection == 0)4148 lq->flags |= LQ_FLAG_USE_RTS_MSK;4149 mvmsta->tx_protection++;4150 } else {4151 mvmsta->tx_protection--;4152 if (mvmsta->tx_protection == 0)4153 lq->flags &= ~LQ_FLAG_USE_RTS_MSK;4154 }4155 4156 return iwl_mvm_send_lq_cmd(mvm, lq);4157}4158 4159/**4160 * iwl_mvm_tx_protection - ask FW to enable RTS/CTS protection4161 * @mvm: The mvm component4162 * @mvmsta: The station4163 * @enable: Enable Tx protection?4164 *4165 * Returns: an error code4166 */4167int iwl_mvm_tx_protection(struct iwl_mvm *mvm, struct iwl_mvm_sta *mvmsta,4168 bool enable)4169{4170 if (iwl_mvm_has_tlc_offload(mvm))4171 return rs_fw_tx_protection(mvm, mvmsta, enable);4172 else4173 return rs_drv_tx_protection(mvm, mvmsta, enable);4174}4175