1 /* SPDX-License-Identifier: GPL-2.0-only */ 2 /****************************************************************************** 3 * 4 * Copyright(c) 2003 - 2014 Intel Corporation. All rights reserved. 5 * Copyright(c) 2015 Intel Mobile Communications GmbH 6 * Copyright(c) 2017 Intel Deutschland GmbH 7 * Copyright(c) 2018 - 2019 Intel Corporation 8 *****************************************************************************/ 9 10 #ifndef __rs_h__ 11 #define __rs_h__ 12 13 #include <net/mac80211.h> 14 15 #include "iwl-config.h" 16 17 #include "fw-api.h" 18 #include "iwl-trans.h" 19 20 #define RS_NAME "iwl-mvm-rs" 21 22 struct iwl_rs_rate_info { 23 u8 plcp; /* uCode API: IWL_RATE_6M_PLCP, etc. */ 24 u8 plcp_ht_siso; /* uCode API: IWL_RATE_SISO_6M_PLCP, etc. */ 25 u8 plcp_ht_mimo2; /* uCode API: IWL_RATE_MIMO2_6M_PLCP, etc. */ 26 u8 plcp_vht_siso; 27 u8 plcp_vht_mimo2; 28 u8 prev_rs; /* previous rate used in rs algo */ 29 u8 next_rs; /* next rate used in rs algo */ 30 }; 31 32 #define IWL_RATE_60M_PLCP 3 33 34 #define LINK_QUAL_MAX_RETRY_NUM 16 35 36 enum { 37 IWL_RATE_6M_INDEX_TABLE = 0, 38 IWL_RATE_9M_INDEX_TABLE, 39 IWL_RATE_12M_INDEX_TABLE, 40 IWL_RATE_18M_INDEX_TABLE, 41 IWL_RATE_24M_INDEX_TABLE, 42 IWL_RATE_36M_INDEX_TABLE, 43 IWL_RATE_48M_INDEX_TABLE, 44 IWL_RATE_54M_INDEX_TABLE, 45 IWL_RATE_1M_INDEX_TABLE, 46 IWL_RATE_2M_INDEX_TABLE, 47 IWL_RATE_5M_INDEX_TABLE, 48 IWL_RATE_11M_INDEX_TABLE, 49 IWL_RATE_INVM_INDEX_TABLE = IWL_RATE_INVM_INDEX - 1, 50 }; 51 52 /* #define vs. enum to keep from defaulting to 'large integer' */ 53 #define IWL_RATE_6M_MASK (1 << IWL_RATE_6M_INDEX) 54 #define IWL_RATE_9M_MASK (1 << IWL_RATE_9M_INDEX) 55 #define IWL_RATE_12M_MASK (1 << IWL_RATE_12M_INDEX) 56 #define IWL_RATE_18M_MASK (1 << IWL_RATE_18M_INDEX) 57 #define IWL_RATE_24M_MASK (1 << IWL_RATE_24M_INDEX) 58 #define IWL_RATE_36M_MASK (1 << IWL_RATE_36M_INDEX) 59 #define IWL_RATE_48M_MASK (1 << IWL_RATE_48M_INDEX) 60 #define IWL_RATE_54M_MASK (1 << IWL_RATE_54M_INDEX) 61 #define IWL_RATE_60M_MASK (1 << IWL_RATE_60M_INDEX) 62 #define IWL_RATE_1M_MASK (1 << IWL_RATE_1M_INDEX) 63 #define IWL_RATE_2M_MASK (1 << IWL_RATE_2M_INDEX) 64 #define IWL_RATE_5M_MASK (1 << IWL_RATE_5M_INDEX) 65 #define IWL_RATE_11M_MASK (1 << IWL_RATE_11M_INDEX) 66 67 68 /* uCode API values for HT/VHT bit rates */ 69 enum { 70 IWL_RATE_HT_SISO_MCS_0_PLCP = 0, 71 IWL_RATE_HT_SISO_MCS_1_PLCP = 1, 72 IWL_RATE_HT_SISO_MCS_2_PLCP = 2, 73 IWL_RATE_HT_SISO_MCS_3_PLCP = 3, 74 IWL_RATE_HT_SISO_MCS_4_PLCP = 4, 75 IWL_RATE_HT_SISO_MCS_5_PLCP = 5, 76 IWL_RATE_HT_SISO_MCS_6_PLCP = 6, 77 IWL_RATE_HT_SISO_MCS_7_PLCP = 7, 78 IWL_RATE_HT_MIMO2_MCS_0_PLCP = 0x8, 79 IWL_RATE_HT_MIMO2_MCS_1_PLCP = 0x9, 80 IWL_RATE_HT_MIMO2_MCS_2_PLCP = 0xA, 81 IWL_RATE_HT_MIMO2_MCS_3_PLCP = 0xB, 82 IWL_RATE_HT_MIMO2_MCS_4_PLCP = 0xC, 83 IWL_RATE_HT_MIMO2_MCS_5_PLCP = 0xD, 84 IWL_RATE_HT_MIMO2_MCS_6_PLCP = 0xE, 85 IWL_RATE_HT_MIMO2_MCS_7_PLCP = 0xF, 86 IWL_RATE_VHT_SISO_MCS_0_PLCP = 0, 87 IWL_RATE_VHT_SISO_MCS_1_PLCP = 1, 88 IWL_RATE_VHT_SISO_MCS_2_PLCP = 2, 89 IWL_RATE_VHT_SISO_MCS_3_PLCP = 3, 90 IWL_RATE_VHT_SISO_MCS_4_PLCP = 4, 91 IWL_RATE_VHT_SISO_MCS_5_PLCP = 5, 92 IWL_RATE_VHT_SISO_MCS_6_PLCP = 6, 93 IWL_RATE_VHT_SISO_MCS_7_PLCP = 7, 94 IWL_RATE_VHT_SISO_MCS_8_PLCP = 8, 95 IWL_RATE_VHT_SISO_MCS_9_PLCP = 9, 96 IWL_RATE_VHT_MIMO2_MCS_0_PLCP = 0x10, 97 IWL_RATE_VHT_MIMO2_MCS_1_PLCP = 0x11, 98 IWL_RATE_VHT_MIMO2_MCS_2_PLCP = 0x12, 99 IWL_RATE_VHT_MIMO2_MCS_3_PLCP = 0x13, 100 IWL_RATE_VHT_MIMO2_MCS_4_PLCP = 0x14, 101 IWL_RATE_VHT_MIMO2_MCS_5_PLCP = 0x15, 102 IWL_RATE_VHT_MIMO2_MCS_6_PLCP = 0x16, 103 IWL_RATE_VHT_MIMO2_MCS_7_PLCP = 0x17, 104 IWL_RATE_VHT_MIMO2_MCS_8_PLCP = 0x18, 105 IWL_RATE_VHT_MIMO2_MCS_9_PLCP = 0x19, 106 IWL_RATE_HT_SISO_MCS_INV_PLCP, 107 IWL_RATE_HT_MIMO2_MCS_INV_PLCP = IWL_RATE_HT_SISO_MCS_INV_PLCP, 108 IWL_RATE_VHT_SISO_MCS_INV_PLCP = IWL_RATE_HT_SISO_MCS_INV_PLCP, 109 IWL_RATE_VHT_MIMO2_MCS_INV_PLCP = IWL_RATE_HT_SISO_MCS_INV_PLCP, 110 IWL_RATE_HT_SISO_MCS_8_PLCP = IWL_RATE_HT_SISO_MCS_INV_PLCP, 111 IWL_RATE_HT_SISO_MCS_9_PLCP = IWL_RATE_HT_SISO_MCS_INV_PLCP, 112 IWL_RATE_HT_MIMO2_MCS_8_PLCP = IWL_RATE_HT_SISO_MCS_INV_PLCP, 113 IWL_RATE_HT_MIMO2_MCS_9_PLCP = IWL_RATE_HT_SISO_MCS_INV_PLCP, 114 }; 115 116 #define IWL_RATES_MASK ((1 << IWL_RATE_COUNT) - 1) 117 118 #define IWL_INVALID_VALUE -1 119 120 #define TPC_MAX_REDUCTION 15 121 #define TPC_NO_REDUCTION 0 122 #define TPC_INVALID 0xff 123 124 #define LINK_QUAL_AGG_FRAME_LIMIT_DEF (63) 125 #define LINK_QUAL_AGG_FRAME_LIMIT_MAX (63) 126 /* 127 * FIXME - various places in firmware API still use u8, 128 * e.g. LQ command and SCD config command. 129 * This should be 256 instead. 130 */ 131 #define LINK_QUAL_AGG_FRAME_LIMIT_GEN2_DEF (255) 132 #define LINK_QUAL_AGG_FRAME_LIMIT_GEN2_MAX (255) 133 #define LINK_QUAL_AGG_FRAME_LIMIT_MIN (0) 134 135 #define LQ_SIZE 2 /* 2 mode tables: "Active" and "Search" */ 136 137 /* load per tid defines for A-MPDU activation */ 138 #define IWL_AGG_TPT_THREHOLD 0 139 #define IWL_AGG_ALL_TID 0xff 140 141 enum iwl_table_type { 142 LQ_NONE, 143 LQ_LEGACY_G, /* legacy types */ 144 LQ_LEGACY_A, 145 LQ_HT_SISO, /* HT types */ 146 LQ_HT_MIMO2, 147 LQ_VHT_SISO, /* VHT types */ 148 LQ_VHT_MIMO2, 149 LQ_HE_SISO, /* HE types */ 150 LQ_HE_MIMO2, 151 LQ_MAX, 152 }; 153 154 struct rs_rate { 155 int index; 156 enum iwl_table_type type; 157 u8 ant; 158 u32 bw; 159 bool sgi; 160 bool ldpc; 161 bool stbc; 162 bool bfer; 163 }; 164 165 166 #define is_type_legacy(type) (((type) == LQ_LEGACY_G) || \ 167 ((type) == LQ_LEGACY_A)) 168 #define is_type_ht_siso(type) ((type) == LQ_HT_SISO) 169 #define is_type_ht_mimo2(type) ((type) == LQ_HT_MIMO2) 170 #define is_type_vht_siso(type) ((type) == LQ_VHT_SISO) 171 #define is_type_vht_mimo2(type) ((type) == LQ_VHT_MIMO2) 172 #define is_type_he_siso(type) ((type) == LQ_HE_SISO) 173 #define is_type_he_mimo2(type) ((type) == LQ_HE_MIMO2) 174 #define is_type_siso(type) (is_type_ht_siso(type) || is_type_vht_siso(type) || \ 175 is_type_he_siso(type)) 176 #define is_type_mimo2(type) (is_type_ht_mimo2(type) || \ 177 is_type_vht_mimo2(type) || is_type_he_mimo2(type)) 178 #define is_type_mimo(type) (is_type_mimo2(type)) 179 #define is_type_ht(type) (is_type_ht_siso(type) || is_type_ht_mimo2(type)) 180 #define is_type_vht(type) (is_type_vht_siso(type) || is_type_vht_mimo2(type)) 181 #define is_type_he(type) (is_type_he_siso(type) || is_type_he_mimo2(type)) 182 #define is_type_a_band(type) ((type) == LQ_LEGACY_A) 183 #define is_type_g_band(type) ((type) == LQ_LEGACY_G) 184 185 #define is_legacy(rate) is_type_legacy((rate)->type) 186 #define is_ht_siso(rate) is_type_ht_siso((rate)->type) 187 #define is_ht_mimo2(rate) is_type_ht_mimo2((rate)->type) 188 #define is_vht_siso(rate) is_type_vht_siso((rate)->type) 189 #define is_vht_mimo2(rate) is_type_vht_mimo2((rate)->type) 190 #define is_siso(rate) is_type_siso((rate)->type) 191 #define is_mimo2(rate) is_type_mimo2((rate)->type) 192 #define is_mimo(rate) is_type_mimo((rate)->type) 193 #define is_ht(rate) is_type_ht((rate)->type) 194 #define is_vht(rate) is_type_vht((rate)->type) 195 #define is_he(rate) is_type_he((rate)->type) 196 #define is_a_band(rate) is_type_a_band((rate)->type) 197 #define is_g_band(rate) is_type_g_band((rate)->type) 198 199 #define is_ht20(rate) ((rate)->bw == RATE_MCS_CHAN_WIDTH_20) 200 #define is_ht40(rate) ((rate)->bw == RATE_MCS_CHAN_WIDTH_40) 201 #define is_ht80(rate) ((rate)->bw == RATE_MCS_CHAN_WIDTH_80) 202 #define is_ht160(rate) ((rate)->bw == RATE_MCS_CHAN_WIDTH_160) 203 204 /** 205 * struct iwl_lq_sta_rs_fw - rate and related statistics for RS in FW 206 * @last_rate_n_flags: last rate reported by FW 207 * @sta_id: the id of the station 208 #ifdef CONFIG_MAC80211_DEBUGFS 209 * @dbg_fixed_rate: for debug, use fixed rate if not 0 210 * @dbg_agg_frame_count_lim: for debug, max number of frames in A-MPDU 211 #endif 212 * @chains: bitmask of chains reported in %chain_signal 213 * @chain_signal: per chain signal strength 214 * @last_rssi: last rssi reported 215 * @drv: pointer back to the driver data 216 */ 217 218 struct iwl_lq_sta_rs_fw { 219 /* last tx rate_n_flags */ 220 u32 last_rate_n_flags; 221 222 /* persistent fields - initialized only once - keep last! */ 223 struct lq_sta_pers_rs_fw { 224 u32 sta_id; 225 #ifdef CONFIG_MAC80211_DEBUGFS 226 u32 dbg_fixed_rate; 227 u16 dbg_agg_frame_count_lim; 228 #endif 229 u8 chains; 230 s8 chain_signal[IEEE80211_MAX_CHAINS]; 231 s8 last_rssi; 232 struct iwl_mvm *drv; 233 } pers; 234 }; 235 236 /** 237 * struct iwl_rate_scale_data -- tx success history for one rate 238 */ 239 struct iwl_rate_scale_data { 240 u64 data; /* bitmap of successful frames */ 241 s32 success_counter; /* number of frames successful */ 242 s32 success_ratio; /* per-cent * 128 */ 243 s32 counter; /* number of frames attempted */ 244 s32 average_tpt; /* success ratio * expected throughput */ 245 }; 246 247 /* Possible Tx columns 248 * Tx Column = a combo of legacy/siso/mimo x antenna x SGI 249 */ 250 enum rs_column { 251 RS_COLUMN_LEGACY_ANT_A = 0, 252 RS_COLUMN_LEGACY_ANT_B, 253 RS_COLUMN_SISO_ANT_A, 254 RS_COLUMN_SISO_ANT_B, 255 RS_COLUMN_SISO_ANT_A_SGI, 256 RS_COLUMN_SISO_ANT_B_SGI, 257 RS_COLUMN_MIMO2, 258 RS_COLUMN_MIMO2_SGI, 259 260 RS_COLUMN_LAST = RS_COLUMN_MIMO2_SGI, 261 RS_COLUMN_COUNT = RS_COLUMN_LAST + 1, 262 RS_COLUMN_INVALID, 263 }; 264 265 enum rs_ss_force_opt { 266 RS_SS_FORCE_NONE = 0, 267 RS_SS_FORCE_STBC, 268 RS_SS_FORCE_BFER, 269 RS_SS_FORCE_SISO, 270 }; 271 272 /* Packet stats per rate */ 273 struct rs_rate_stats { 274 u64 success; 275 u64 total; 276 }; 277 278 /** 279 * struct iwl_scale_tbl_info -- tx params and success history for all rates 280 * 281 * There are two of these in struct iwl_lq_sta, 282 * one for "active", and one for "search". 283 */ 284 struct iwl_scale_tbl_info { 285 struct rs_rate rate; 286 enum rs_column column; 287 const u16 *expected_tpt; /* throughput metrics; expected_tpt_G, etc. */ 288 struct iwl_rate_scale_data win[IWL_RATE_COUNT]; /* rate histories */ 289 /* per txpower-reduction history */ 290 struct iwl_rate_scale_data tpc_win[TPC_MAX_REDUCTION + 1]; 291 }; 292 293 enum { 294 RS_STATE_SEARCH_CYCLE_STARTED, 295 RS_STATE_SEARCH_CYCLE_ENDED, 296 RS_STATE_STAY_IN_COLUMN, 297 }; 298 299 /** 300 * struct iwl_lq_sta -- driver's rate scaling private structure 301 * 302 * Pointer to this gets passed back and forth between driver and mac80211. 303 */ 304 struct iwl_lq_sta { 305 u8 active_tbl; /* index of active table, range 0-1 */ 306 u8 rs_state; /* RS_STATE_* */ 307 u8 search_better_tbl; /* 1: currently trying alternate mode */ 308 s32 last_tpt; 309 310 /* The following determine when to search for a new mode */ 311 u32 table_count_limit; 312 u32 max_failure_limit; /* # failed frames before new search */ 313 u32 max_success_limit; /* # successful frames before new search */ 314 u32 table_count; 315 u32 total_failed; /* total failed frames, any/all rates */ 316 u32 total_success; /* total successful frames, any/all rates */ 317 u64 flush_timer; /* time staying in mode before new search */ 318 319 u32 visited_columns; /* Bitmask marking which Tx columns were 320 * explored during a search cycle 321 */ 322 u64 last_tx; 323 bool is_vht; 324 bool ldpc; /* LDPC Rx is supported by the STA */ 325 bool stbc_capable; /* Tx STBC is supported by chip and Rx by STA */ 326 bool bfer_capable; /* Remote supports beamformee and we BFer */ 327 328 enum nl80211_band band; 329 330 /* The following are bitmaps of rates; IWL_RATE_6M_MASK, etc. */ 331 unsigned long active_legacy_rate; 332 unsigned long active_siso_rate; 333 unsigned long active_mimo2_rate; 334 335 /* Highest rate per Tx mode */ 336 u8 max_legacy_rate_idx; 337 u8 max_siso_rate_idx; 338 u8 max_mimo2_rate_idx; 339 340 /* Optimal rate based on RSSI and STA caps. 341 * Used only to reflect link speed to userspace. 342 */ 343 struct rs_rate optimal_rate; 344 unsigned long optimal_rate_mask; 345 const struct rs_init_rate_info *optimal_rates; 346 int optimal_nentries; 347 348 u8 missed_rate_counter; 349 350 struct iwl_lq_cmd lq; 351 struct iwl_scale_tbl_info lq_info[LQ_SIZE]; /* "active", "search" */ 352 u8 tx_agg_tid_en; 353 354 /* last tx rate_n_flags */ 355 u32 last_rate_n_flags; 356 /* packets destined for this STA are aggregated */ 357 u8 is_agg; 358 359 /* tx power reduce for this sta */ 360 int tpc_reduce; 361 362 /* persistent fields - initialized only once - keep last! */ 363 struct lq_sta_pers { 364 #ifdef CONFIG_MAC80211_DEBUGFS 365 u32 dbg_fixed_rate; 366 u8 dbg_fixed_txp_reduction; 367 368 /* force STBC/BFER/SISO for testing */ 369 enum rs_ss_force_opt ss_force; 370 #endif 371 u8 chains; 372 s8 chain_signal[IEEE80211_MAX_CHAINS]; 373 s8 last_rssi; 374 struct rs_rate_stats tx_stats[RS_COLUMN_COUNT][IWL_RATE_COUNT]; 375 struct iwl_mvm *drv; 376 spinlock_t lock; /* for races in reinit/update table */ 377 } pers; 378 }; 379 380 /* ieee80211_tx_info's status_driver_data[0] is packed with lq color and txp 381 * Note, it's iwlmvm <-> mac80211 interface. 382 * bits 0-7: reduced tx power 383 * bits 8-10: LQ command's color 384 */ 385 #define RS_DRV_DATA_TXP_MSK 0xff 386 #define RS_DRV_DATA_LQ_COLOR_POS 8 387 #define RS_DRV_DATA_LQ_COLOR_MSK (7 << RS_DRV_DATA_LQ_COLOR_POS) 388 #define RS_DRV_DATA_LQ_COLOR_GET(_f) (((_f) & RS_DRV_DATA_LQ_COLOR_MSK) >>\ 389 RS_DRV_DATA_LQ_COLOR_POS) 390 #define RS_DRV_DATA_PACK(_c, _p) ((void *)(uintptr_t)\ 391 (((uintptr_t)_p) |\ 392 ((_c) << RS_DRV_DATA_LQ_COLOR_POS))) 393 394 /* Initialize station's rate scaling information after adding station */ 395 void iwl_mvm_rs_rate_init(struct iwl_mvm *mvm, struct ieee80211_sta *sta, 396 enum nl80211_band band, bool init); 397 398 /* Notify RS about Tx status */ 399 void iwl_mvm_rs_tx_status(struct iwl_mvm *mvm, struct ieee80211_sta *sta, 400 int tid, struct ieee80211_tx_info *info, bool ndp); 401 402 /** 403 * iwl_rate_control_register - Register the rate control algorithm callbacks 404 * 405 * Since the rate control algorithm is hardware specific, there is no need 406 * or reason to place it as a stand alone module. The driver can call 407 * iwl_rate_control_register in order to register the rate control callbacks 408 * with the mac80211 subsystem. This should be performed prior to calling 409 * ieee80211_register_hw 410 * 411 */ 412 int iwl_mvm_rate_control_register(void); 413 414 /** 415 * iwl_rate_control_unregister - Unregister the rate control callbacks 416 * 417 * This should be called after calling ieee80211_unregister_hw, but before 418 * the driver is unloaded. 419 */ 420 void iwl_mvm_rate_control_unregister(void); 421 422 struct iwl_mvm_sta; 423 424 int iwl_mvm_tx_protection(struct iwl_mvm *mvm, struct iwl_mvm_sta *mvmsta, 425 bool enable); 426 427 #ifdef CONFIG_IWLWIFI_DEBUGFS 428 void iwl_mvm_reset_frame_stats(struct iwl_mvm *mvm); 429 #endif 430 431 void iwl_mvm_rs_add_sta(struct iwl_mvm *mvm, struct iwl_mvm_sta *mvmsta); 432 void rs_fw_rate_init(struct iwl_mvm *mvm, struct ieee80211_sta *sta, 433 enum nl80211_band band, bool update); 434 int rs_fw_tx_protection(struct iwl_mvm *mvm, struct iwl_mvm_sta *mvmsta, 435 bool enable); 436 void iwl_mvm_tlc_update_notif(struct iwl_mvm *mvm, 437 struct iwl_rx_cmd_buffer *rxb); 438 439 u16 rs_fw_get_max_amsdu_len(struct ieee80211_sta *sta); 440 #endif /* __rs__ */ 441