1// SPDX-License-Identifier: GPL-2.0-only 2/****************************************************************************** 3 * 4 * Copyright(c) 2005 - 2014, 2018 - 2023 Intel Corporation. All rights reserved. 5 * Copyright(c) 2013 - 2015 Intel Mobile Communications GmbH 6 * Copyright(c) 2016 - 2017 Intel Deutschland GmbH 7 *****************************************************************************/ 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 percentage 29 */ 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 rate 73 * 74 * If there isn't a valid next or previous rate then INV is used which 75 * maps to IWL_RATE_INVALID 76 * 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 7 110#define MAX_COLUMN_CHECKS 3 111 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 rates 386 * 387 * 1, 2, 5.5, 11, 6, 9, 12, 18, 24, 36, 48, 54, 60 MBits 388 * 389 * where invalid entries are zeros. 390 * 391 * CCK rates are only valid in legacy table and will only be used in G 392 * (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, 0 396}; 397 398/* Expected TpT tables. 4 indexes: 399 * 0 - NGI, 1 - SGI, 2 - AGG+NGI, 3 - AGG+SGI 400 */ 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 else 515 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 sync 572 * this might be cause by reloading firmware 573 * stop the tx ba session here 574 */ 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_COUNT 590 * when the frame is not QoS 591 */ 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_info 619 * that wraps a NULL pointer check 620 */ 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 window 630 * 631 * We keep a sliding window of the last 62 packets transmitted 632 * at this rate. window->data contains the bitmask of successful 633 * 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's 648 * 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 reason 652 * 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 else 686 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 else 695 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 a 730 * BA session, so it should be updated only when A-MPDU is 731 * 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 rates 789 * This helps with congested environments reducing the conflict cost to 790 * 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 else 806 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 else 818 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 else 864 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 in 976 * 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 reached 1033 */ 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 else 1069 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 else 1078 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 else 1106 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 status 1160 */ 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 before 1189 * 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 streams 1254 * (SISO/MIMO2), channel width (20/40/80), SGI, and aggregation 1255 * 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 better 1314 * configuration. This function, according to the index of the currently 1315 * active table returns the search table, which is located at the 1316 * 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 support 1383 * says we cannot use 2 streams, we don't want to 1384 * deal with this. 1385 * We only check MCS 0 - they will support that if 1386 * 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, or 1407 * begin search for a new mode, based on: 1408 * 1) # tx successes or failures while using this mode 1409 * 2) # times calling this function 1410 * 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 used 1436 * this same modulation for a long time, allow search, and 1437 * reset history stats that keep track of whether we should 1438 * allow a new search. Also (below) reset all bitmaps and 1439 * 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 repetitions 1463 * (regardless of elapsed time or success/failure), reset 1464 * history bitmaps and rate-specific stats for all rates in 1465 * 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 history 1480 * bitmaps and stats in active table (this will become the new 1481 * "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 0xFFFF 1501 * 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 else 1508 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 else 1514 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 else 1524 /* 1525 * Not so elegant, but this will effectively 1526 * prevent AMSDU on this TID 1527 */ 1528 sta->deflink.agg.max_tid_amsdu_len[i] = 1; 1529 } 1530} 1531 1532/* 1533 * setup rate table in uCode 1534 */ 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 is 1566 * sustainable, i.e. we're past the test window. We can't go back 1567 * if MCS5 is just tested as this will happen always after switching 1568 * 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 else 1696 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->SISO 1723 */ 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 which 1839 * supports STBC of at least 1*SS 1840 */ 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 coex 1874 * 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_DEBUGFS 1978 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#endif 1985 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 else 1991 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 in 2080 * the rest of this function: "search" if searching for better 2081 * 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 else 2086 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 average 2128 * throughput, keep analyzing results of more tx frames, without 2129 * 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 supported 2131 * 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're 2155 * 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 mode 2192 * 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 better 2199 * 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 now 2279 * 2) Not just finishing up a search 2280 * 3) Allowing a new search 2281 */ 2282 if (!update_lq && !done_search && 2283 lq_sta->rs_state == RS_STATE_SEARCH_CYCLE_STARTED 2284 && 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 caps 2404 * This combined with rssi is used to report the last tx rate 2405 * 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 else 2420 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 RSSI 2485 * of last Rx 2486 */ 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 else 2517 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 capability 2540 * 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 of 2542 * 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 initialized 2548 * immediately upon association completion, before the phy 2549 * context is updated with the association parameters, so the 2550 * sta bandwidth might be wider than the phy context allows. 2551 * To avoid this issue, always initialize rs with 20mhz 2552 * bandwidth rate, and after authorization, when the phy context 2553 * 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 table 2626 * 2627 * The uCode's station table contains a table of fallback rates 2628 * for automatic fallback during transmission. 2629 * 2630 * NOTE: This sets up a default set of values. These will be replaced later 2631 * if the driver's iwl-agn-rs rate scaling algorithm is used, instead of 2632 * rc80211_simple. 2633 * 2634 * NOTE: Run REPLY_ADD_STA command to set up station table entry, before 2635 * 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 else 2653 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 about 2688 * this station, so don't do anything with the it 2689 */ 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't 2704 * converged yet (too little traffic) or exploring other modulations 2705 */ 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_DEBUGFS 2728 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#endif 2732 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_DEBUGFS 2853void 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 else 2906 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#endif 2916 2917/* 2918 * Called after adding a new station to initialize rate scaling 2919 */ 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 not 2953 * the lowest or the highest rate.. Could consider using RSSI from 2954 * previous packets? Need to have IEEE 802.1X auth succeed immediately 2955 * 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 bitmap 2961 */ 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 else 2971 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_DEBUGFS 3001 iwl_mvm_reset_frame_stats(mvm); 3002#endif 3003 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_DEBUGFS 3065 /* Disable last tx check if we are debugging with fixed rate but 3066 * update tx stats 3067 */ 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#endif 3095 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 directly 3101 * the unlocked version 3102 */ 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 match 3109 * that of latest Link Quality command. There may be stragglers 3110 * from a previous Link Quality command, but we're no longer interested 3111 * in those; they're either from the "active" mode while we're trying 3112 * to check "search" mode, or a prior "search" mode after we've moved 3113 * 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 with 3130 * ... 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 collection 3165 * and continue to perform rate scale to find the rate table 3166 */ 3167 rs_stay_in_table(lq_sta, true); 3168 goto done; 3169 } 3170 3171 /* Updating the frame history depends on whether packets were 3172 * aggregated. 3173 * 3174 * For aggregation, all packets were transmitted at the same rate, the 3175 * 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, treat 3184 * it as a single frame loss as we don't want the success ratio 3185 * to dip too quickly because a BA wasn't received. 3186 * For TPC, there's no need for this optimisation since we want 3187 * to recover very quickly from a bad power reduction and, 3188 * therefore we'd like the success ratio to get an immediate hit 3189 * when failing to get a BA, so we'd switch back to a lower or 3190 * zero power reduction. When FW transmits agg with a rate 3191 * different from the initial rate, it will not use reduced txp 3192 * and will send BA notification twice (one empty with reduced 3193 * 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 RS 3228 * 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 else 3236 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 flow 3268 * just wait for next tx status to update the lq_sta data 3269 */ 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_DEBUGFS 3278static 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 else 3300 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 else 3310 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/SGI 3351 * column the rate table should look like this: 3352 * 3353 * rate[0] 0x400F019 VHT | ANT: AB BW: 80Mhz MCS: 9 NSS: 2 SGI 3354 * rate[1] 0x400F019 VHT | ANT: AB BW: 80Mhz MCS: 9 NSS: 2 SGI 3355 * rate[2] 0x400F018 VHT | ANT: AB BW: 80Mhz MCS: 8 NSS: 2 SGI 3356 * rate[3] 0x400F018 VHT | ANT: AB BW: 80Mhz MCS: 8 NSS: 2 SGI 3357 * rate[4] 0x400F017 VHT | ANT: AB BW: 80Mhz MCS: 7 NSS: 2 SGI 3358 * rate[5] 0x400F017 VHT | ANT: AB BW: 80Mhz MCS: 7 NSS: 2 SGI 3359 * rate[6] 0x4005007 VHT | ANT: A BW: 80Mhz MCS: 7 NSS: 1 NGI 3360 * rate[7] 0x4009006 VHT | ANT: B BW: 80Mhz MCS: 6 NSS: 1 NGI 3361 * rate[8] 0x4005005 VHT | ANT: A BW: 80Mhz MCS: 5 NSS: 1 NGI 3362 * rate[9] 0x800B Legacy | ANT: B Rate: 36 Mbps 3363 * rate[10] 0x4009 Legacy | ANT: A Rate: 24 Mbps 3364 * rate[11] 0x8007 Legacy | ANT: B Rate: 18 Mbps 3365 * rate[12] 0x4005 Legacy | ANT: A Rate: 12 Mbps 3366 * rate[13] 0x800F Legacy | ANT: B Rate: 9 Mbps 3367 * rate[14] 0x400D Legacy | ANT: A Rate: 6 Mbps 3368 * rate[15] 0x800D Legacy | ANT: B Rate: 6 Mbps 3369 */ 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_DEBUGFS 3521 /* Check if forcing the decision is configured. 3522 * Note that SISO is forced by not allowing STBC or BFER 3523 */ 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#endif 3535 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 different 3548 * stations. This is guaranteed by the fact that calls to 3549 * 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_DEBUGFS 3594 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#endif 3601 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 the 3620 * Tx Fifo so that it can start a transaction in the same TxOP. This 3621 * 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_DEBUGFS 3701/* 3702 * Program the device to use fixed rate for frame transmit 3703 * This is for debugging/testing only 3704 * once the device start use fixed rate, we need to reload the module 3705 * 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 else 3741 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#endif 4080 4081/* 4082 * Initialization of rate scaling information is done by driver after 4083 * the station is added. Since mac80211 calls this function before a 4084 * 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_DEBUGFS 4105 .add_sta_debugfs = rs_drv_add_sta_debugfs, 4106#endif 4107 .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 protection 4161 * @mvm: The mvm component 4162 * @mvmsta: The station 4163 * @enable: Enable Tx protection? 4164 * 4165 * Returns: an error code 4166 */ 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 else 4173 return rs_drv_tx_protection(mvm, mvmsta, enable); 4174} 4175