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 - 2022 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 #define LINK_QUAL_AGG_FRAME_LIMIT_GEN2_DEF (64) 126 #define LINK_QUAL_AGG_FRAME_LIMIT_GEN2_MAX (64) 127 #define LINK_QUAL_AGG_FRAME_LIMIT_MIN (0) 128 129 #define LQ_SIZE 2 /* 2 mode tables: "Active" and "Search" */ 130 131 /* load per tid defines for A-MPDU activation */ 132 #define IWL_AGG_TPT_THREHOLD 0 133 #define IWL_AGG_ALL_TID 0xff 134 135 enum iwl_table_type { 136 LQ_NONE, 137 LQ_LEGACY_G, /* legacy types */ 138 LQ_LEGACY_A, 139 LQ_HT_SISO, /* HT types */ 140 LQ_HT_MIMO2, 141 LQ_VHT_SISO, /* VHT types */ 142 LQ_VHT_MIMO2, 143 LQ_HE_SISO, /* HE types */ 144 LQ_HE_MIMO2, 145 LQ_MAX, 146 }; 147 148 struct rs_rate { 149 int index; 150 enum iwl_table_type type; 151 u8 ant; 152 u32 bw; 153 bool sgi; 154 bool ldpc; 155 bool stbc; 156 bool bfer; 157 }; 158 159 160 #define is_type_legacy(type) (((type) == LQ_LEGACY_G) || \ 161 ((type) == LQ_LEGACY_A)) 162 #define is_type_ht_siso(type) ((type) == LQ_HT_SISO) 163 #define is_type_ht_mimo2(type) ((type) == LQ_HT_MIMO2) 164 #define is_type_vht_siso(type) ((type) == LQ_VHT_SISO) 165 #define is_type_vht_mimo2(type) ((type) == LQ_VHT_MIMO2) 166 #define is_type_he_siso(type) ((type) == LQ_HE_SISO) 167 #define is_type_he_mimo2(type) ((type) == LQ_HE_MIMO2) 168 #define is_type_siso(type) (is_type_ht_siso(type) || is_type_vht_siso(type) || \ 169 is_type_he_siso(type)) 170 #define is_type_mimo2(type) (is_type_ht_mimo2(type) || \ 171 is_type_vht_mimo2(type) || is_type_he_mimo2(type)) 172 #define is_type_mimo(type) (is_type_mimo2(type)) 173 #define is_type_ht(type) (is_type_ht_siso(type) || is_type_ht_mimo2(type)) 174 #define is_type_vht(type) (is_type_vht_siso(type) || is_type_vht_mimo2(type)) 175 #define is_type_he(type) (is_type_he_siso(type) || is_type_he_mimo2(type)) 176 #define is_type_a_band(type) ((type) == LQ_LEGACY_A) 177 #define is_type_g_band(type) ((type) == LQ_LEGACY_G) 178 179 #define is_legacy(rate) is_type_legacy((rate)->type) 180 #define is_ht_siso(rate) is_type_ht_siso((rate)->type) 181 #define is_ht_mimo2(rate) is_type_ht_mimo2((rate)->type) 182 #define is_vht_siso(rate) is_type_vht_siso((rate)->type) 183 #define is_vht_mimo2(rate) is_type_vht_mimo2((rate)->type) 184 #define is_siso(rate) is_type_siso((rate)->type) 185 #define is_mimo2(rate) is_type_mimo2((rate)->type) 186 #define is_mimo(rate) is_type_mimo((rate)->type) 187 #define is_ht(rate) is_type_ht((rate)->type) 188 #define is_vht(rate) is_type_vht((rate)->type) 189 #define is_he(rate) is_type_he((rate)->type) 190 #define is_a_band(rate) is_type_a_band((rate)->type) 191 #define is_g_band(rate) is_type_g_band((rate)->type) 192 193 #define is_ht20(rate) ((rate)->bw == RATE_MCS_CHAN_WIDTH_20) 194 #define is_ht40(rate) ((rate)->bw == RATE_MCS_CHAN_WIDTH_40) 195 #define is_ht80(rate) ((rate)->bw == RATE_MCS_CHAN_WIDTH_80) 196 #define is_ht160(rate) ((rate)->bw == RATE_MCS_CHAN_WIDTH_160) 197 198 /** 199 * struct iwl_lq_sta_rs_fw - rate and related statistics for RS in FW 200 * @last_rate_n_flags: last rate reported by FW 201 * @max_agg_bufsize: the maximal size of the AGG buffer for this station 202 * @sta_id: the id of the station 203 #ifdef CONFIG_MAC80211_DEBUGFS 204 * @dbg_fixed_rate: for debug, use fixed rate if not 0 205 * @dbg_agg_frame_count_lim: for debug, max number of frames in A-MPDU 206 #endif 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 */ 212 213 struct iwl_lq_sta_rs_fw { 214 /* last tx rate_n_flags */ 215 u32 last_rate_n_flags; 216 217 /* persistent fields - initialized only once - keep last! */ 218 struct lq_sta_pers_rs_fw { 219 u32 sta_id; 220 #ifdef CONFIG_MAC80211_DEBUGFS 221 u32 dbg_fixed_rate; 222 u16 dbg_agg_frame_count_lim; 223 #endif 224 u8 chains; 225 s8 chain_signal[IEEE80211_MAX_CHAINS]; 226 s8 last_rssi; 227 struct iwl_mvm *drv; 228 } pers; 229 }; 230 231 /** 232 * struct iwl_rate_scale_data -- tx success history for one rate 233 */ 234 struct iwl_rate_scale_data { 235 u64 data; /* bitmap of successful frames */ 236 s32 success_counter; /* number of frames successful */ 237 s32 success_ratio; /* per-cent * 128 */ 238 s32 counter; /* number of frames attempted */ 239 s32 average_tpt; /* success ratio * expected throughput */ 240 }; 241 242 /* Possible Tx columns 243 * Tx Column = a combo of legacy/siso/mimo x antenna x SGI 244 */ 245 enum rs_column { 246 RS_COLUMN_LEGACY_ANT_A = 0, 247 RS_COLUMN_LEGACY_ANT_B, 248 RS_COLUMN_SISO_ANT_A, 249 RS_COLUMN_SISO_ANT_B, 250 RS_COLUMN_SISO_ANT_A_SGI, 251 RS_COLUMN_SISO_ANT_B_SGI, 252 RS_COLUMN_MIMO2, 253 RS_COLUMN_MIMO2_SGI, 254 255 RS_COLUMN_LAST = RS_COLUMN_MIMO2_SGI, 256 RS_COLUMN_COUNT = RS_COLUMN_LAST + 1, 257 RS_COLUMN_INVALID, 258 }; 259 260 enum rs_ss_force_opt { 261 RS_SS_FORCE_NONE = 0, 262 RS_SS_FORCE_STBC, 263 RS_SS_FORCE_BFER, 264 RS_SS_FORCE_SISO, 265 }; 266 267 /* Packet stats per rate */ 268 struct rs_rate_stats { 269 u64 success; 270 u64 total; 271 }; 272 273 /** 274 * struct iwl_scale_tbl_info -- tx params and success history for all rates 275 * 276 * There are two of these in struct iwl_lq_sta, 277 * one for "active", and one for "search". 278 */ 279 struct iwl_scale_tbl_info { 280 struct rs_rate rate; 281 enum rs_column column; 282 const u16 *expected_tpt; /* throughput metrics; expected_tpt_G, etc. */ 283 struct iwl_rate_scale_data win[IWL_RATE_COUNT]; /* rate histories */ 284 /* per txpower-reduction history */ 285 struct iwl_rate_scale_data tpc_win[TPC_MAX_REDUCTION + 1]; 286 }; 287 288 enum { 289 RS_STATE_SEARCH_CYCLE_STARTED, 290 RS_STATE_SEARCH_CYCLE_ENDED, 291 RS_STATE_STAY_IN_COLUMN, 292 }; 293 294 /** 295 * struct iwl_lq_sta -- driver's rate scaling private structure 296 * 297 * Pointer to this gets passed back and forth between driver and mac80211. 298 */ 299 struct iwl_lq_sta { 300 u8 active_tbl; /* index of active table, range 0-1 */ 301 u8 rs_state; /* RS_STATE_* */ 302 u8 search_better_tbl; /* 1: currently trying alternate mode */ 303 s32 last_tpt; 304 305 /* The following determine when to search for a new mode */ 306 u32 table_count_limit; 307 u32 max_failure_limit; /* # failed frames before new search */ 308 u32 max_success_limit; /* # successful frames before new search */ 309 u32 table_count; 310 u32 total_failed; /* total failed frames, any/all rates */ 311 u32 total_success; /* total successful frames, any/all rates */ 312 u64 flush_timer; /* time staying in mode before new search */ 313 314 u32 visited_columns; /* Bitmask marking which Tx columns were 315 * explored during a search cycle 316 */ 317 u64 last_tx; 318 bool is_vht; 319 bool ldpc; /* LDPC Rx is supported by the STA */ 320 bool stbc_capable; /* Tx STBC is supported by chip and Rx by STA */ 321 bool bfer_capable; /* Remote supports beamformee and we BFer */ 322 323 enum nl80211_band band; 324 325 /* The following are bitmaps of rates; IWL_RATE_6M_MASK, etc. */ 326 unsigned long active_legacy_rate; 327 unsigned long active_siso_rate; 328 unsigned long active_mimo2_rate; 329 330 /* Highest rate per Tx mode */ 331 u8 max_legacy_rate_idx; 332 u8 max_siso_rate_idx; 333 u8 max_mimo2_rate_idx; 334 335 /* Optimal rate based on RSSI and STA caps. 336 * Used only to reflect link speed to userspace. 337 */ 338 struct rs_rate optimal_rate; 339 unsigned long optimal_rate_mask; 340 const struct rs_init_rate_info *optimal_rates; 341 int optimal_nentries; 342 343 u8 missed_rate_counter; 344 345 struct iwl_lq_cmd lq; 346 struct iwl_scale_tbl_info lq_info[LQ_SIZE]; /* "active", "search" */ 347 u8 tx_agg_tid_en; 348 349 /* last tx rate_n_flags */ 350 u32 last_rate_n_flags; 351 352 /* packets destined for this STA are aggregated */ 353 u8 is_agg; 354 355 /* tx power reduce for this sta */ 356 int tpc_reduce; 357 358 /* persistent fields - initialized only once - keep last! */ 359 struct lq_sta_pers { 360 #ifdef CONFIG_MAC80211_DEBUGFS 361 u32 dbg_fixed_rate; 362 u8 dbg_fixed_txp_reduction; 363 364 /* force STBC/BFER/SISO for testing */ 365 enum rs_ss_force_opt ss_force; 366 #endif 367 u8 chains; 368 s8 chain_signal[IEEE80211_MAX_CHAINS]; 369 s8 last_rssi; 370 u16 max_agg_bufsize; 371 struct rs_rate_stats tx_stats[RS_COLUMN_COUNT][IWL_RATE_COUNT]; 372 struct iwl_mvm *drv; 373 spinlock_t lock; /* for races in reinit/update table */ 374 } pers; 375 }; 376 377 /* ieee80211_tx_info's status_driver_data[0] is packed with lq color and txp 378 * Note, it's iwlmvm <-> mac80211 interface. 379 * bits 0-7: reduced tx power 380 * bits 8-10: LQ command's color 381 */ 382 #define RS_DRV_DATA_TXP_MSK 0xff 383 #define RS_DRV_DATA_LQ_COLOR_POS 8 384 #define RS_DRV_DATA_LQ_COLOR_MSK (7 << RS_DRV_DATA_LQ_COLOR_POS) 385 #define RS_DRV_DATA_LQ_COLOR_GET(_f) (((_f) & RS_DRV_DATA_LQ_COLOR_MSK) >>\ 386 RS_DRV_DATA_LQ_COLOR_POS) 387 #define RS_DRV_DATA_PACK(_c, _p) ((void *)(uintptr_t)\ 388 (((uintptr_t)_p) |\ 389 ((_c) << RS_DRV_DATA_LQ_COLOR_POS))) 390 391 /* Initialize station's rate scaling information after adding station */ 392 void iwl_mvm_rs_rate_init(struct iwl_mvm *mvm, 393 struct ieee80211_vif *vif, 394 struct ieee80211_sta *sta, 395 struct ieee80211_bss_conf *link_conf, 396 struct ieee80211_link_sta *link_sta, 397 enum nl80211_band band); 398 399 /* Notify RS about Tx status */ 400 void iwl_mvm_rs_tx_status(struct iwl_mvm *mvm, struct ieee80211_sta *sta, 401 int tid, struct ieee80211_tx_info *info, bool ndp); 402 403 /** 404 * iwl_rate_control_register - Register the rate control algorithm callbacks 405 * 406 * Since the rate control algorithm is hardware specific, there is no need 407 * or reason to place it as a stand alone module. The driver can call 408 * iwl_rate_control_register in order to register the rate control callbacks 409 * with the mac80211 subsystem. This should be performed prior to calling 410 * ieee80211_register_hw 411 * 412 */ 413 int iwl_mvm_rate_control_register(void); 414 415 /** 416 * iwl_rate_control_unregister - Unregister the rate control callbacks 417 * 418 * This should be called after calling ieee80211_unregister_hw, but before 419 * the driver is unloaded. 420 */ 421 void iwl_mvm_rate_control_unregister(void); 422 423 struct iwl_mvm_sta; 424 425 int iwl_mvm_tx_protection(struct iwl_mvm *mvm, struct iwl_mvm_sta *mvmsta, 426 bool enable); 427 428 #ifdef CONFIG_IWLWIFI_DEBUGFS 429 void iwl_mvm_reset_frame_stats(struct iwl_mvm *mvm); 430 #endif 431 432 struct iwl_mvm_link_sta; 433 434 void iwl_mvm_rs_add_sta(struct iwl_mvm *mvm, struct iwl_mvm_sta *mvmsta); 435 void iwl_mvm_rs_add_sta_link(struct iwl_mvm *mvm, 436 struct iwl_mvm_link_sta *link_sta); 437 438 void iwl_mvm_rs_fw_rate_init(struct iwl_mvm *mvm, 439 struct ieee80211_vif *vif, 440 struct ieee80211_sta *sta, 441 struct ieee80211_bss_conf *link_conf, 442 struct ieee80211_link_sta *link_sta, 443 enum nl80211_band band); 444 int rs_fw_tx_protection(struct iwl_mvm *mvm, struct iwl_mvm_sta *mvmsta, 445 bool enable); 446 void iwl_mvm_tlc_update_notif(struct iwl_mvm *mvm, 447 struct iwl_rx_cmd_buffer *rxb); 448 449 u16 rs_fw_get_max_amsdu_len(struct ieee80211_sta *sta, 450 struct ieee80211_bss_conf *link_conf, 451 struct ieee80211_link_sta *link_sta); 452 #endif /* __rs__ */ 453