1 /* SPDX-License-Identifier: GPL-2.0-only */ 2 /****************************************************************************** 3 * 4 * Copyright(c) 2015 Intel Mobile Communications GmbH 5 * Copyright(c) 2017 Intel Deutschland GmbH 6 * Copyright (C) 2003 - 2014, 2018 - 2023 Intel Corporation 7 *****************************************************************************/ 8 9 #ifndef __rs_h__ 10 #define __rs_h__ 11 12 #include <net/mac80211.h> 13 14 #include "iwl-config.h" 15 16 #include "fw-api.h" 17 #include "iwl-trans.h" 18 19 #define RS_NAME "iwl-mvm-rs" 20 21 struct iwl_rs_rate_info { 22 u8 plcp; /* uCode API: IWL_RATE_6M_PLCP, etc. */ 23 u8 plcp_ht_siso; /* uCode API: IWL_RATE_SISO_6M_PLCP, etc. */ 24 u8 plcp_ht_mimo2; /* uCode API: IWL_RATE_MIMO2_6M_PLCP, etc. */ 25 u8 plcp_vht_siso; 26 u8 plcp_vht_mimo2; 27 u8 prev_rs; /* previous rate used in rs algo */ 28 u8 next_rs; /* next rate used in rs algo */ 29 }; 30 31 #define IWL_RATE_60M_PLCP 3 32 33 #define LINK_QUAL_MAX_RETRY_NUM 16 34 35 enum { 36 IWL_RATE_6M_INDEX_TABLE = 0, 37 IWL_RATE_9M_INDEX_TABLE, 38 IWL_RATE_12M_INDEX_TABLE, 39 IWL_RATE_18M_INDEX_TABLE, 40 IWL_RATE_24M_INDEX_TABLE, 41 IWL_RATE_36M_INDEX_TABLE, 42 IWL_RATE_48M_INDEX_TABLE, 43 IWL_RATE_54M_INDEX_TABLE, 44 IWL_RATE_1M_INDEX_TABLE, 45 IWL_RATE_2M_INDEX_TABLE, 46 IWL_RATE_5M_INDEX_TABLE, 47 IWL_RATE_11M_INDEX_TABLE, 48 IWL_RATE_INVM_INDEX_TABLE = IWL_RATE_INVM_INDEX - 1, 49 }; 50 51 /* #define vs. enum to keep from defaulting to 'large integer' */ 52 #define IWL_RATE_6M_MASK (1 << IWL_RATE_6M_INDEX) 53 #define IWL_RATE_9M_MASK (1 << IWL_RATE_9M_INDEX) 54 #define IWL_RATE_12M_MASK (1 << IWL_RATE_12M_INDEX) 55 #define IWL_RATE_18M_MASK (1 << IWL_RATE_18M_INDEX) 56 #define IWL_RATE_24M_MASK (1 << IWL_RATE_24M_INDEX) 57 #define IWL_RATE_36M_MASK (1 << IWL_RATE_36M_INDEX) 58 #define IWL_RATE_48M_MASK (1 << IWL_RATE_48M_INDEX) 59 #define IWL_RATE_54M_MASK (1 << IWL_RATE_54M_INDEX) 60 #define IWL_RATE_60M_MASK (1 << IWL_RATE_60M_INDEX) 61 #define IWL_RATE_1M_MASK (1 << IWL_RATE_1M_INDEX) 62 #define IWL_RATE_2M_MASK (1 << IWL_RATE_2M_INDEX) 63 #define IWL_RATE_5M_MASK (1 << IWL_RATE_5M_INDEX) 64 #define IWL_RATE_11M_MASK (1 << IWL_RATE_11M_INDEX) 65 66 67 /* uCode API values for HT/VHT bit rates */ 68 enum { 69 IWL_RATE_HT_SISO_MCS_0_PLCP = 0, 70 IWL_RATE_HT_SISO_MCS_1_PLCP = 1, 71 IWL_RATE_HT_SISO_MCS_2_PLCP = 2, 72 IWL_RATE_HT_SISO_MCS_3_PLCP = 3, 73 IWL_RATE_HT_SISO_MCS_4_PLCP = 4, 74 IWL_RATE_HT_SISO_MCS_5_PLCP = 5, 75 IWL_RATE_HT_SISO_MCS_6_PLCP = 6, 76 IWL_RATE_HT_SISO_MCS_7_PLCP = 7, 77 IWL_RATE_HT_MIMO2_MCS_0_PLCP = 0x8, 78 IWL_RATE_HT_MIMO2_MCS_1_PLCP = 0x9, 79 IWL_RATE_HT_MIMO2_MCS_2_PLCP = 0xA, 80 IWL_RATE_HT_MIMO2_MCS_3_PLCP = 0xB, 81 IWL_RATE_HT_MIMO2_MCS_4_PLCP = 0xC, 82 IWL_RATE_HT_MIMO2_MCS_5_PLCP = 0xD, 83 IWL_RATE_HT_MIMO2_MCS_6_PLCP = 0xE, 84 IWL_RATE_HT_MIMO2_MCS_7_PLCP = 0xF, 85 IWL_RATE_VHT_SISO_MCS_0_PLCP = 0, 86 IWL_RATE_VHT_SISO_MCS_1_PLCP = 1, 87 IWL_RATE_VHT_SISO_MCS_2_PLCP = 2, 88 IWL_RATE_VHT_SISO_MCS_3_PLCP = 3, 89 IWL_RATE_VHT_SISO_MCS_4_PLCP = 4, 90 IWL_RATE_VHT_SISO_MCS_5_PLCP = 5, 91 IWL_RATE_VHT_SISO_MCS_6_PLCP = 6, 92 IWL_RATE_VHT_SISO_MCS_7_PLCP = 7, 93 IWL_RATE_VHT_SISO_MCS_8_PLCP = 8, 94 IWL_RATE_VHT_SISO_MCS_9_PLCP = 9, 95 IWL_RATE_VHT_MIMO2_MCS_0_PLCP = 0x10, 96 IWL_RATE_VHT_MIMO2_MCS_1_PLCP = 0x11, 97 IWL_RATE_VHT_MIMO2_MCS_2_PLCP = 0x12, 98 IWL_RATE_VHT_MIMO2_MCS_3_PLCP = 0x13, 99 IWL_RATE_VHT_MIMO2_MCS_4_PLCP = 0x14, 100 IWL_RATE_VHT_MIMO2_MCS_5_PLCP = 0x15, 101 IWL_RATE_VHT_MIMO2_MCS_6_PLCP = 0x16, 102 IWL_RATE_VHT_MIMO2_MCS_7_PLCP = 0x17, 103 IWL_RATE_VHT_MIMO2_MCS_8_PLCP = 0x18, 104 IWL_RATE_VHT_MIMO2_MCS_9_PLCP = 0x19, 105 IWL_RATE_HT_SISO_MCS_INV_PLCP, 106 IWL_RATE_HT_MIMO2_MCS_INV_PLCP = IWL_RATE_HT_SISO_MCS_INV_PLCP, 107 IWL_RATE_VHT_SISO_MCS_INV_PLCP = IWL_RATE_HT_SISO_MCS_INV_PLCP, 108 IWL_RATE_VHT_MIMO2_MCS_INV_PLCP = IWL_RATE_HT_SISO_MCS_INV_PLCP, 109 IWL_RATE_HT_SISO_MCS_8_PLCP = IWL_RATE_HT_SISO_MCS_INV_PLCP, 110 IWL_RATE_HT_SISO_MCS_9_PLCP = IWL_RATE_HT_SISO_MCS_INV_PLCP, 111 IWL_RATE_HT_MIMO2_MCS_8_PLCP = IWL_RATE_HT_SISO_MCS_INV_PLCP, 112 IWL_RATE_HT_MIMO2_MCS_9_PLCP = IWL_RATE_HT_SISO_MCS_INV_PLCP, 113 }; 114 115 #define IWL_RATES_MASK ((1 << IWL_RATE_COUNT) - 1) 116 117 #define IWL_INVALID_VALUE -1 118 119 #define TPC_MAX_REDUCTION 15 120 #define TPC_NO_REDUCTION 0 121 #define TPC_INVALID 0xff 122 123 #define LINK_QUAL_AGG_FRAME_LIMIT_DEF (63) 124 #define LINK_QUAL_AGG_FRAME_LIMIT_MAX (63) 125 /* 126 * FIXME - various places in firmware API still use u8, 127 * e.g. LQ command and SCD config command. 128 * This should be 256 instead. 129 */ 130 #define LINK_QUAL_AGG_FRAME_LIMIT_GEN2_DEF (255) 131 #define LINK_QUAL_AGG_FRAME_LIMIT_GEN2_MAX (255) 132 #define LINK_QUAL_AGG_FRAME_LIMIT_MIN (0) 133 134 #define LQ_SIZE 2 /* 2 mode tables: "Active" and "Search" */ 135 136 /* load per tid defines for A-MPDU activation */ 137 #define IWL_AGG_TPT_THREHOLD 0 138 #define IWL_AGG_ALL_TID 0xff 139 140 enum iwl_table_type { 141 LQ_NONE, 142 LQ_LEGACY_G, /* legacy types */ 143 LQ_LEGACY_A, 144 LQ_HT_SISO, /* HT types */ 145 LQ_HT_MIMO2, 146 LQ_VHT_SISO, /* VHT types */ 147 LQ_VHT_MIMO2, 148 LQ_HE_SISO, /* HE types */ 149 LQ_HE_MIMO2, 150 LQ_MAX, 151 }; 152 153 struct rs_rate { 154 int index; 155 enum iwl_table_type type; 156 u8 ant; 157 u32 bw; 158 bool sgi; 159 bool ldpc; 160 bool stbc; 161 bool bfer; 162 }; 163 164 165 #define is_type_legacy(type) (((type) == LQ_LEGACY_G) || \ 166 ((type) == LQ_LEGACY_A)) 167 #define is_type_ht_siso(type) ((type) == LQ_HT_SISO) 168 #define is_type_ht_mimo2(type) ((type) == LQ_HT_MIMO2) 169 #define is_type_vht_siso(type) ((type) == LQ_VHT_SISO) 170 #define is_type_vht_mimo2(type) ((type) == LQ_VHT_MIMO2) 171 #define is_type_he_siso(type) ((type) == LQ_HE_SISO) 172 #define is_type_he_mimo2(type) ((type) == LQ_HE_MIMO2) 173 #define is_type_siso(type) (is_type_ht_siso(type) || is_type_vht_siso(type) || \ 174 is_type_he_siso(type)) 175 #define is_type_mimo2(type) (is_type_ht_mimo2(type) || \ 176 is_type_vht_mimo2(type) || is_type_he_mimo2(type)) 177 #define is_type_mimo(type) (is_type_mimo2(type)) 178 #define is_type_ht(type) (is_type_ht_siso(type) || is_type_ht_mimo2(type)) 179 #define is_type_vht(type) (is_type_vht_siso(type) || is_type_vht_mimo2(type)) 180 #define is_type_he(type) (is_type_he_siso(type) || is_type_he_mimo2(type)) 181 #define is_type_a_band(type) ((type) == LQ_LEGACY_A) 182 #define is_type_g_band(type) ((type) == LQ_LEGACY_G) 183 184 #define is_legacy(rate) is_type_legacy((rate)->type) 185 #define is_ht_siso(rate) is_type_ht_siso((rate)->type) 186 #define is_ht_mimo2(rate) is_type_ht_mimo2((rate)->type) 187 #define is_vht_siso(rate) is_type_vht_siso((rate)->type) 188 #define is_vht_mimo2(rate) is_type_vht_mimo2((rate)->type) 189 #define is_siso(rate) is_type_siso((rate)->type) 190 #define is_mimo2(rate) is_type_mimo2((rate)->type) 191 #define is_mimo(rate) is_type_mimo((rate)->type) 192 #define is_ht(rate) is_type_ht((rate)->type) 193 #define is_vht(rate) is_type_vht((rate)->type) 194 #define is_he(rate) is_type_he((rate)->type) 195 #define is_a_band(rate) is_type_a_band((rate)->type) 196 #define is_g_band(rate) is_type_g_band((rate)->type) 197 198 #define is_ht20(rate) ((rate)->bw == RATE_MCS_CHAN_WIDTH_20) 199 #define is_ht40(rate) ((rate)->bw == RATE_MCS_CHAN_WIDTH_40) 200 #define is_ht80(rate) ((rate)->bw == RATE_MCS_CHAN_WIDTH_80) 201 #define is_ht160(rate) ((rate)->bw == RATE_MCS_CHAN_WIDTH_160) 202 203 /** 204 * struct iwl_lq_sta_rs_fw - rate and related statistics for RS in FW 205 * @last_rate_n_flags: last rate reported by FW 206 * @pers.sta_id: the id of the station 207 * @chains: bitmask of chains reported in %chain_signal 208 * @chain_signal: per chain signal strength 209 * @last_rssi: last rssi reported 210 * @drv: pointer back to the driver data 211 */ 212 struct iwl_lq_sta_rs_fw { 213 /* last tx rate_n_flags */ 214 u32 last_rate_n_flags; 215 216 /* persistent fields - initialized only once - keep last! */ 217 struct lq_sta_pers_rs_fw { 218 u32 sta_id; 219 #ifdef CONFIG_MAC80211_DEBUGFS 220 /** 221 * @dbg_fixed_rate: for debug, use fixed rate if not 0 222 */ 223 u32 dbg_fixed_rate; 224 /** 225 * @dbg_agg_frame_count_lim: for debug, max number of 226 * frames in A-MPDU 227 */ 228 u16 dbg_agg_frame_count_lim; 229 #endif 230 u8 chains; 231 s8 chain_signal[IEEE80211_MAX_CHAINS]; 232 s8 last_rssi; 233 struct iwl_mvm *drv; 234 } pers; 235 }; 236 237 /* 238 * struct iwl_rate_scale_data -- tx success history for one rate 239 */ 240 struct iwl_rate_scale_data { 241 u64 data; /* bitmap of successful frames */ 242 s32 success_counter; /* number of frames successful */ 243 s32 success_ratio; /* per-cent * 128 */ 244 s32 counter; /* number of frames attempted */ 245 s32 average_tpt; /* success ratio * expected throughput */ 246 }; 247 248 /* Possible Tx columns 249 * Tx Column = a combo of legacy/siso/mimo x antenna x SGI 250 */ 251 enum rs_column { 252 RS_COLUMN_LEGACY_ANT_A = 0, 253 RS_COLUMN_LEGACY_ANT_B, 254 RS_COLUMN_SISO_ANT_A, 255 RS_COLUMN_SISO_ANT_B, 256 RS_COLUMN_SISO_ANT_A_SGI, 257 RS_COLUMN_SISO_ANT_B_SGI, 258 RS_COLUMN_MIMO2, 259 RS_COLUMN_MIMO2_SGI, 260 261 RS_COLUMN_LAST = RS_COLUMN_MIMO2_SGI, 262 RS_COLUMN_COUNT = RS_COLUMN_LAST + 1, 263 RS_COLUMN_INVALID, 264 }; 265 266 enum rs_ss_force_opt { 267 RS_SS_FORCE_NONE = 0, 268 RS_SS_FORCE_STBC, 269 RS_SS_FORCE_BFER, 270 RS_SS_FORCE_SISO, 271 }; 272 273 /* Packet stats per rate */ 274 struct rs_rate_stats { 275 u64 success; 276 u64 total; 277 }; 278 279 /* 280 * struct iwl_scale_tbl_info -- tx params and success history for all rates 281 * 282 * There are two of these in struct iwl_lq_sta, 283 * one for "active", and one for "search". 284 */ 285 struct iwl_scale_tbl_info { 286 struct rs_rate rate; 287 enum rs_column column; 288 const u16 *expected_tpt; /* throughput metrics; expected_tpt_G, etc. */ 289 struct iwl_rate_scale_data win[IWL_RATE_COUNT]; /* rate histories */ 290 /* per txpower-reduction history */ 291 struct iwl_rate_scale_data tpc_win[TPC_MAX_REDUCTION + 1]; 292 }; 293 294 enum { 295 RS_STATE_SEARCH_CYCLE_STARTED, 296 RS_STATE_SEARCH_CYCLE_ENDED, 297 RS_STATE_STAY_IN_COLUMN, 298 }; 299 300 /* 301 * struct iwl_lq_sta -- driver's rate scaling private structure 302 * 303 * Pointer to this gets passed back and forth between driver and mac80211. 304 */ 305 struct iwl_lq_sta { 306 u8 active_tbl; /* index of active table, range 0-1 */ 307 u8 rs_state; /* RS_STATE_* */ 308 u8 search_better_tbl; /* 1: currently trying alternate mode */ 309 s32 last_tpt; 310 311 /* The following determine when to search for a new mode */ 312 u32 table_count_limit; 313 u32 max_failure_limit; /* # failed frames before new search */ 314 u32 max_success_limit; /* # successful frames before new search */ 315 u32 table_count; 316 u32 total_failed; /* total failed frames, any/all rates */ 317 u32 total_success; /* total successful frames, any/all rates */ 318 u64 flush_timer; /* time staying in mode before new search */ 319 320 u32 visited_columns; /* Bitmask marking which Tx columns were 321 * explored during a search cycle 322 */ 323 u64 last_tx; 324 bool is_vht; 325 bool ldpc; /* LDPC Rx is supported by the STA */ 326 bool stbc_capable; /* Tx STBC is supported by chip and Rx by STA */ 327 bool bfer_capable; /* Remote supports beamformee and we BFer */ 328 329 enum nl80211_band band; 330 331 /* The following are bitmaps of rates; IWL_RATE_6M_MASK, etc. */ 332 unsigned long active_legacy_rate; 333 unsigned long active_siso_rate; 334 unsigned long active_mimo2_rate; 335 336 /* Highest rate per Tx mode */ 337 u8 max_legacy_rate_idx; 338 u8 max_siso_rate_idx; 339 u8 max_mimo2_rate_idx; 340 341 /* Optimal rate based on RSSI and STA caps. 342 * Used only to reflect link speed to userspace. 343 */ 344 struct rs_rate optimal_rate; 345 unsigned long optimal_rate_mask; 346 const struct rs_init_rate_info *optimal_rates; 347 int optimal_nentries; 348 349 u8 missed_rate_counter; 350 351 struct iwl_lq_cmd lq; 352 struct iwl_scale_tbl_info lq_info[LQ_SIZE]; /* "active", "search" */ 353 u8 tx_agg_tid_en; 354 355 /* last tx rate_n_flags */ 356 u32 last_rate_n_flags; 357 358 /* packets destined for this STA are aggregated */ 359 u8 is_agg; 360 361 /* tx power reduce for this sta */ 362 int tpc_reduce; 363 364 /* persistent fields - initialized only once - keep last! */ 365 struct lq_sta_pers { 366 #ifdef CONFIG_MAC80211_DEBUGFS 367 u32 dbg_fixed_rate; 368 u8 dbg_fixed_txp_reduction; 369 370 /* force STBC/BFER/SISO for testing */ 371 enum rs_ss_force_opt ss_force; 372 #endif 373 u8 chains; 374 s8 chain_signal[IEEE80211_MAX_CHAINS]; 375 s8 last_rssi; 376 u16 max_agg_bufsize; 377 struct rs_rate_stats tx_stats[RS_COLUMN_COUNT][IWL_RATE_COUNT]; 378 struct iwl_mvm *drv; 379 spinlock_t lock; /* for races in reinit/update table */ 380 } pers; 381 }; 382 383 /* ieee80211_tx_info's status_driver_data[0] is packed with lq color and txp 384 * Note, it's iwlmvm <-> mac80211 interface. 385 * bits 0-7: reduced tx power 386 * bits 8-10: LQ command's color 387 */ 388 #define RS_DRV_DATA_TXP_MSK 0xff 389 #define RS_DRV_DATA_LQ_COLOR_POS 8 390 #define RS_DRV_DATA_LQ_COLOR_MSK (7 << RS_DRV_DATA_LQ_COLOR_POS) 391 #define RS_DRV_DATA_LQ_COLOR_GET(_f) (((_f) & RS_DRV_DATA_LQ_COLOR_MSK) >>\ 392 RS_DRV_DATA_LQ_COLOR_POS) 393 #define RS_DRV_DATA_PACK(_c, _p) ((void *)(uintptr_t)\ 394 (((uintptr_t)_p) |\ 395 ((_c) << RS_DRV_DATA_LQ_COLOR_POS))) 396 397 /* Initialize station's rate scaling information after adding station */ 398 void iwl_mvm_rs_rate_init(struct iwl_mvm *mvm, 399 struct ieee80211_vif *vif, 400 struct ieee80211_sta *sta, 401 struct ieee80211_bss_conf *link_conf, 402 struct ieee80211_link_sta *link_sta, 403 enum nl80211_band band); 404 405 /* Notify RS about Tx status */ 406 void iwl_mvm_rs_tx_status(struct iwl_mvm *mvm, struct ieee80211_sta *sta, 407 int tid, struct ieee80211_tx_info *info, bool ndp); 408 409 /** 410 * iwl_rate_control_register - Register the rate control algorithm callbacks 411 * 412 * Since the rate control algorithm is hardware specific, there is no need 413 * or reason to place it as a stand alone module. The driver can call 414 * iwl_rate_control_register in order to register the rate control callbacks 415 * with the mac80211 subsystem. This should be performed prior to calling 416 * ieee80211_register_hw 417 * 418 */ 419 int iwl_mvm_rate_control_register(void); 420 421 /** 422 * iwl_rate_control_unregister - Unregister the rate control callbacks 423 * 424 * This should be called after calling ieee80211_unregister_hw, but before 425 * the driver is unloaded. 426 */ 427 void iwl_mvm_rate_control_unregister(void); 428 429 struct iwl_mvm_sta; 430 431 int iwl_mvm_tx_protection(struct iwl_mvm *mvm, struct iwl_mvm_sta *mvmsta, 432 bool enable); 433 434 #ifdef CONFIG_IWLWIFI_DEBUGFS 435 void iwl_mvm_reset_frame_stats(struct iwl_mvm *mvm); 436 #endif 437 438 struct iwl_mvm_link_sta; 439 440 void iwl_mvm_rs_add_sta(struct iwl_mvm *mvm, struct iwl_mvm_sta *mvmsta); 441 void iwl_mvm_rs_add_sta_link(struct iwl_mvm *mvm, 442 struct iwl_mvm_link_sta *link_sta); 443 444 void iwl_mvm_rs_fw_rate_init(struct iwl_mvm *mvm, 445 struct ieee80211_vif *vif, 446 struct ieee80211_sta *sta, 447 struct ieee80211_bss_conf *link_conf, 448 struct ieee80211_link_sta *link_sta, 449 enum nl80211_band band); 450 int rs_fw_tx_protection(struct iwl_mvm *mvm, struct iwl_mvm_sta *mvmsta, 451 bool enable); 452 void iwl_mvm_tlc_update_notif(struct iwl_mvm *mvm, 453 struct iwl_rx_cmd_buffer *rxb); 454 455 u16 rs_fw_get_max_amsdu_len(struct ieee80211_sta *sta, 456 struct ieee80211_bss_conf *link_conf, 457 struct ieee80211_link_sta *link_sta); 458 #endif /* __rs__ */ 459