1 /****************************************************************************** 2 * 3 * Copyright(c) 2003 - 2014 Intel Corporation. All rights reserved. 4 * Copyright(c) 2015 Intel Mobile Communications GmbH 5 * 6 * This program is free software; you can redistribute it and/or modify it 7 * under the terms of version 2 of the GNU General Public License as 8 * published by the Free Software Foundation. 9 * 10 * This program is distributed in the hope that it will be useful, but WITHOUT 11 * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or 12 * FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License for 13 * more details. 14 * 15 * You should have received a copy of the GNU General Public License along with 16 * this program; if not, write to the Free Software Foundation, Inc., 17 * 51 Franklin Street, Fifth Floor, Boston, MA 02110, USA 18 * 19 * The full GNU General Public License is included in this distribution in the 20 * file called LICENSE. 21 * 22 * Contact Information: 23 * Intel Linux Wireless <linuxwifi@intel.com> 24 * Intel Corporation, 5200 N.E. Elam Young Parkway, Hillsboro, OR 97124-6497 25 * 26 *****************************************************************************/ 27 28 #ifndef __rs_h__ 29 #define __rs_h__ 30 31 #include <net/mac80211.h> 32 33 #include "iwl-config.h" 34 35 #include "fw-api.h" 36 #include "iwl-trans.h" 37 38 struct iwl_rs_rate_info { 39 u8 plcp; /* uCode API: IWL_RATE_6M_PLCP, etc. */ 40 u8 plcp_ht_siso; /* uCode API: IWL_RATE_SISO_6M_PLCP, etc. */ 41 u8 plcp_ht_mimo2; /* uCode API: IWL_RATE_MIMO2_6M_PLCP, etc. */ 42 u8 plcp_vht_siso; 43 u8 plcp_vht_mimo2; 44 u8 prev_rs; /* previous rate used in rs algo */ 45 u8 next_rs; /* next rate used in rs algo */ 46 }; 47 48 #define IWL_RATE_60M_PLCP 3 49 50 enum { 51 IWL_RATE_INVM_INDEX = IWL_RATE_COUNT, 52 IWL_RATE_INVALID = IWL_RATE_COUNT, 53 }; 54 55 #define LINK_QUAL_MAX_RETRY_NUM 16 56 57 enum { 58 IWL_RATE_6M_INDEX_TABLE = 0, 59 IWL_RATE_9M_INDEX_TABLE, 60 IWL_RATE_12M_INDEX_TABLE, 61 IWL_RATE_18M_INDEX_TABLE, 62 IWL_RATE_24M_INDEX_TABLE, 63 IWL_RATE_36M_INDEX_TABLE, 64 IWL_RATE_48M_INDEX_TABLE, 65 IWL_RATE_54M_INDEX_TABLE, 66 IWL_RATE_1M_INDEX_TABLE, 67 IWL_RATE_2M_INDEX_TABLE, 68 IWL_RATE_5M_INDEX_TABLE, 69 IWL_RATE_11M_INDEX_TABLE, 70 IWL_RATE_INVM_INDEX_TABLE = IWL_RATE_INVM_INDEX - 1, 71 }; 72 73 /* #define vs. enum to keep from defaulting to 'large integer' */ 74 #define IWL_RATE_6M_MASK (1 << IWL_RATE_6M_INDEX) 75 #define IWL_RATE_9M_MASK (1 << IWL_RATE_9M_INDEX) 76 #define IWL_RATE_12M_MASK (1 << IWL_RATE_12M_INDEX) 77 #define IWL_RATE_18M_MASK (1 << IWL_RATE_18M_INDEX) 78 #define IWL_RATE_24M_MASK (1 << IWL_RATE_24M_INDEX) 79 #define IWL_RATE_36M_MASK (1 << IWL_RATE_36M_INDEX) 80 #define IWL_RATE_48M_MASK (1 << IWL_RATE_48M_INDEX) 81 #define IWL_RATE_54M_MASK (1 << IWL_RATE_54M_INDEX) 82 #define IWL_RATE_60M_MASK (1 << IWL_RATE_60M_INDEX) 83 #define IWL_RATE_1M_MASK (1 << IWL_RATE_1M_INDEX) 84 #define IWL_RATE_2M_MASK (1 << IWL_RATE_2M_INDEX) 85 #define IWL_RATE_5M_MASK (1 << IWL_RATE_5M_INDEX) 86 #define IWL_RATE_11M_MASK (1 << IWL_RATE_11M_INDEX) 87 88 89 /* uCode API values for HT/VHT bit rates */ 90 enum { 91 IWL_RATE_HT_SISO_MCS_0_PLCP = 0, 92 IWL_RATE_HT_SISO_MCS_1_PLCP = 1, 93 IWL_RATE_HT_SISO_MCS_2_PLCP = 2, 94 IWL_RATE_HT_SISO_MCS_3_PLCP = 3, 95 IWL_RATE_HT_SISO_MCS_4_PLCP = 4, 96 IWL_RATE_HT_SISO_MCS_5_PLCP = 5, 97 IWL_RATE_HT_SISO_MCS_6_PLCP = 6, 98 IWL_RATE_HT_SISO_MCS_7_PLCP = 7, 99 IWL_RATE_HT_MIMO2_MCS_0_PLCP = 0x8, 100 IWL_RATE_HT_MIMO2_MCS_1_PLCP = 0x9, 101 IWL_RATE_HT_MIMO2_MCS_2_PLCP = 0xA, 102 IWL_RATE_HT_MIMO2_MCS_3_PLCP = 0xB, 103 IWL_RATE_HT_MIMO2_MCS_4_PLCP = 0xC, 104 IWL_RATE_HT_MIMO2_MCS_5_PLCP = 0xD, 105 IWL_RATE_HT_MIMO2_MCS_6_PLCP = 0xE, 106 IWL_RATE_HT_MIMO2_MCS_7_PLCP = 0xF, 107 IWL_RATE_VHT_SISO_MCS_0_PLCP = 0, 108 IWL_RATE_VHT_SISO_MCS_1_PLCP = 1, 109 IWL_RATE_VHT_SISO_MCS_2_PLCP = 2, 110 IWL_RATE_VHT_SISO_MCS_3_PLCP = 3, 111 IWL_RATE_VHT_SISO_MCS_4_PLCP = 4, 112 IWL_RATE_VHT_SISO_MCS_5_PLCP = 5, 113 IWL_RATE_VHT_SISO_MCS_6_PLCP = 6, 114 IWL_RATE_VHT_SISO_MCS_7_PLCP = 7, 115 IWL_RATE_VHT_SISO_MCS_8_PLCP = 8, 116 IWL_RATE_VHT_SISO_MCS_9_PLCP = 9, 117 IWL_RATE_VHT_MIMO2_MCS_0_PLCP = 0x10, 118 IWL_RATE_VHT_MIMO2_MCS_1_PLCP = 0x11, 119 IWL_RATE_VHT_MIMO2_MCS_2_PLCP = 0x12, 120 IWL_RATE_VHT_MIMO2_MCS_3_PLCP = 0x13, 121 IWL_RATE_VHT_MIMO2_MCS_4_PLCP = 0x14, 122 IWL_RATE_VHT_MIMO2_MCS_5_PLCP = 0x15, 123 IWL_RATE_VHT_MIMO2_MCS_6_PLCP = 0x16, 124 IWL_RATE_VHT_MIMO2_MCS_7_PLCP = 0x17, 125 IWL_RATE_VHT_MIMO2_MCS_8_PLCP = 0x18, 126 IWL_RATE_VHT_MIMO2_MCS_9_PLCP = 0x19, 127 IWL_RATE_HT_SISO_MCS_INV_PLCP, 128 IWL_RATE_HT_MIMO2_MCS_INV_PLCP = IWL_RATE_HT_SISO_MCS_INV_PLCP, 129 IWL_RATE_VHT_SISO_MCS_INV_PLCP = IWL_RATE_HT_SISO_MCS_INV_PLCP, 130 IWL_RATE_VHT_MIMO2_MCS_INV_PLCP = IWL_RATE_HT_SISO_MCS_INV_PLCP, 131 IWL_RATE_HT_SISO_MCS_8_PLCP = IWL_RATE_HT_SISO_MCS_INV_PLCP, 132 IWL_RATE_HT_SISO_MCS_9_PLCP = IWL_RATE_HT_SISO_MCS_INV_PLCP, 133 IWL_RATE_HT_MIMO2_MCS_8_PLCP = IWL_RATE_HT_SISO_MCS_INV_PLCP, 134 IWL_RATE_HT_MIMO2_MCS_9_PLCP = IWL_RATE_HT_SISO_MCS_INV_PLCP, 135 }; 136 137 #define IWL_RATES_MASK ((1 << IWL_RATE_COUNT) - 1) 138 139 #define IWL_INVALID_VALUE -1 140 141 #define TPC_MAX_REDUCTION 15 142 #define TPC_NO_REDUCTION 0 143 #define TPC_INVALID 0xff 144 145 #define LINK_QUAL_AGG_FRAME_LIMIT_DEF (63) 146 #define LINK_QUAL_AGG_FRAME_LIMIT_MAX (63) 147 #define LINK_QUAL_AGG_FRAME_LIMIT_MIN (0) 148 149 #define LQ_SIZE 2 /* 2 mode tables: "Active" and "Search" */ 150 151 /* load per tid defines for A-MPDU activation */ 152 #define IWL_AGG_TPT_THREHOLD 0 153 #define IWL_AGG_ALL_TID 0xff 154 155 enum iwl_table_type { 156 LQ_NONE, 157 LQ_LEGACY_G, /* legacy types */ 158 LQ_LEGACY_A, 159 LQ_HT_SISO, /* HT types */ 160 LQ_HT_MIMO2, 161 LQ_VHT_SISO, /* VHT types */ 162 LQ_VHT_MIMO2, 163 LQ_MAX, 164 }; 165 166 struct rs_rate { 167 int index; 168 enum iwl_table_type type; 169 u8 ant; 170 u32 bw; 171 bool sgi; 172 bool ldpc; 173 bool stbc; 174 bool bfer; 175 }; 176 177 178 #define is_type_legacy(type) (((type) == LQ_LEGACY_G) || \ 179 ((type) == LQ_LEGACY_A)) 180 #define is_type_ht_siso(type) ((type) == LQ_HT_SISO) 181 #define is_type_ht_mimo2(type) ((type) == LQ_HT_MIMO2) 182 #define is_type_vht_siso(type) ((type) == LQ_VHT_SISO) 183 #define is_type_vht_mimo2(type) ((type) == LQ_VHT_MIMO2) 184 #define is_type_siso(type) (is_type_ht_siso(type) || is_type_vht_siso(type)) 185 #define is_type_mimo2(type) (is_type_ht_mimo2(type) || is_type_vht_mimo2(type)) 186 #define is_type_mimo(type) (is_type_mimo2(type)) 187 #define is_type_ht(type) (is_type_ht_siso(type) || is_type_ht_mimo2(type)) 188 #define is_type_vht(type) (is_type_vht_siso(type) || is_type_vht_mimo2(type)) 189 #define is_type_a_band(type) ((type) == LQ_LEGACY_A) 190 #define is_type_g_band(type) ((type) == LQ_LEGACY_G) 191 192 #define is_legacy(rate) is_type_legacy((rate)->type) 193 #define is_ht_siso(rate) is_type_ht_siso((rate)->type) 194 #define is_ht_mimo2(rate) is_type_ht_mimo2((rate)->type) 195 #define is_vht_siso(rate) is_type_vht_siso((rate)->type) 196 #define is_vht_mimo2(rate) is_type_vht_mimo2((rate)->type) 197 #define is_siso(rate) is_type_siso((rate)->type) 198 #define is_mimo2(rate) is_type_mimo2((rate)->type) 199 #define is_mimo(rate) is_type_mimo((rate)->type) 200 #define is_ht(rate) is_type_ht((rate)->type) 201 #define is_vht(rate) is_type_vht((rate)->type) 202 #define is_a_band(rate) is_type_a_band((rate)->type) 203 #define is_g_band(rate) is_type_g_band((rate)->type) 204 205 #define is_ht20(rate) ((rate)->bw == RATE_MCS_CHAN_WIDTH_20) 206 #define is_ht40(rate) ((rate)->bw == RATE_MCS_CHAN_WIDTH_40) 207 #define is_ht80(rate) ((rate)->bw == RATE_MCS_CHAN_WIDTH_80) 208 209 #define IWL_MAX_MCS_DISPLAY_SIZE 12 210 211 struct iwl_rate_mcs_info { 212 char mbps[IWL_MAX_MCS_DISPLAY_SIZE]; 213 char mcs[IWL_MAX_MCS_DISPLAY_SIZE]; 214 }; 215 216 /** 217 * struct iwl_rate_scale_data -- tx success history for one rate 218 */ 219 struct iwl_rate_scale_data { 220 u64 data; /* bitmap of successful frames */ 221 s32 success_counter; /* number of frames successful */ 222 s32 success_ratio; /* per-cent * 128 */ 223 s32 counter; /* number of frames attempted */ 224 s32 average_tpt; /* success ratio * expected throughput */ 225 }; 226 227 /* Possible Tx columns 228 * Tx Column = a combo of legacy/siso/mimo x antenna x SGI 229 */ 230 enum rs_column { 231 RS_COLUMN_LEGACY_ANT_A = 0, 232 RS_COLUMN_LEGACY_ANT_B, 233 RS_COLUMN_SISO_ANT_A, 234 RS_COLUMN_SISO_ANT_B, 235 RS_COLUMN_SISO_ANT_A_SGI, 236 RS_COLUMN_SISO_ANT_B_SGI, 237 RS_COLUMN_MIMO2, 238 RS_COLUMN_MIMO2_SGI, 239 240 RS_COLUMN_LAST = RS_COLUMN_MIMO2_SGI, 241 RS_COLUMN_COUNT = RS_COLUMN_LAST + 1, 242 RS_COLUMN_INVALID, 243 }; 244 245 enum rs_ss_force_opt { 246 RS_SS_FORCE_NONE = 0, 247 RS_SS_FORCE_STBC, 248 RS_SS_FORCE_BFER, 249 RS_SS_FORCE_SISO, 250 }; 251 252 /* Packet stats per rate */ 253 struct rs_rate_stats { 254 u64 success; 255 u64 total; 256 }; 257 258 /** 259 * struct iwl_scale_tbl_info -- tx params and success history for all rates 260 * 261 * There are two of these in struct iwl_lq_sta, 262 * one for "active", and one for "search". 263 */ 264 struct iwl_scale_tbl_info { 265 struct rs_rate rate; 266 enum rs_column column; 267 const u16 *expected_tpt; /* throughput metrics; expected_tpt_G, etc. */ 268 struct iwl_rate_scale_data win[IWL_RATE_COUNT]; /* rate histories */ 269 /* per txpower-reduction history */ 270 struct iwl_rate_scale_data tpc_win[TPC_MAX_REDUCTION + 1]; 271 }; 272 273 enum { 274 RS_STATE_SEARCH_CYCLE_STARTED, 275 RS_STATE_SEARCH_CYCLE_ENDED, 276 RS_STATE_STAY_IN_COLUMN, 277 }; 278 279 /** 280 * struct iwl_lq_sta -- driver's rate scaling private structure 281 * 282 * Pointer to this gets passed back and forth between driver and mac80211. 283 */ 284 struct iwl_lq_sta { 285 u8 active_tbl; /* index of active table, range 0-1 */ 286 u8 rs_state; /* RS_STATE_* */ 287 u8 search_better_tbl; /* 1: currently trying alternate mode */ 288 s32 last_tpt; 289 290 /* The following determine when to search for a new mode */ 291 u32 table_count_limit; 292 u32 max_failure_limit; /* # failed frames before new search */ 293 u32 max_success_limit; /* # successful frames before new search */ 294 u32 table_count; 295 u32 total_failed; /* total failed frames, any/all rates */ 296 u32 total_success; /* total successful frames, any/all rates */ 297 u64 flush_timer; /* time staying in mode before new search */ 298 299 u32 visited_columns; /* Bitmask marking which Tx columns were 300 * explored during a search cycle 301 */ 302 u64 last_tx; 303 bool is_vht; 304 bool ldpc; /* LDPC Rx is supported by the STA */ 305 bool stbc_capable; /* Tx STBC is supported by chip and Rx by STA */ 306 bool bfer_capable; /* Remote supports beamformee and we BFer */ 307 308 enum nl80211_band band; 309 310 /* The following are bitmaps of rates; IWL_RATE_6M_MASK, etc. */ 311 unsigned long active_legacy_rate; 312 unsigned long active_siso_rate; 313 unsigned long active_mimo2_rate; 314 315 /* Highest rate per Tx mode */ 316 u8 max_legacy_rate_idx; 317 u8 max_siso_rate_idx; 318 u8 max_mimo2_rate_idx; 319 320 /* Optimal rate based on RSSI and STA caps. 321 * Used only to reflect link speed to userspace. 322 */ 323 struct rs_rate optimal_rate; 324 unsigned long optimal_rate_mask; 325 const struct rs_init_rate_info *optimal_rates; 326 int optimal_nentries; 327 328 u8 missed_rate_counter; 329 330 struct iwl_lq_cmd lq; 331 struct iwl_scale_tbl_info lq_info[LQ_SIZE]; /* "active", "search" */ 332 u8 tx_agg_tid_en; 333 334 /* last tx rate_n_flags */ 335 u32 last_rate_n_flags; 336 /* packets destined for this STA are aggregated */ 337 u8 is_agg; 338 339 /* tx power reduce for this sta */ 340 int tpc_reduce; 341 342 /* persistent fields - initialized only once - keep last! */ 343 struct lq_sta_pers { 344 #ifdef CONFIG_MAC80211_DEBUGFS 345 u32 dbg_fixed_rate; 346 u8 dbg_fixed_txp_reduction; 347 348 /* force STBC/BFER/SISO for testing */ 349 enum rs_ss_force_opt ss_force; 350 #endif 351 u8 chains; 352 s8 chain_signal[IEEE80211_MAX_CHAINS]; 353 s8 last_rssi; 354 struct rs_rate_stats tx_stats[RS_COLUMN_COUNT][IWL_RATE_COUNT]; 355 struct iwl_mvm *drv; 356 } pers; 357 }; 358 359 /* Initialize station's rate scaling information after adding station */ 360 void iwl_mvm_rs_rate_init(struct iwl_mvm *mvm, struct ieee80211_sta *sta, 361 enum nl80211_band band, bool init); 362 363 /* Notify RS about Tx status */ 364 void iwl_mvm_rs_tx_status(struct iwl_mvm *mvm, struct ieee80211_sta *sta, 365 int tid, struct ieee80211_tx_info *info); 366 367 /** 368 * iwl_rate_control_register - Register the rate control algorithm callbacks 369 * 370 * Since the rate control algorithm is hardware specific, there is no need 371 * or reason to place it as a stand alone module. The driver can call 372 * iwl_rate_control_register in order to register the rate control callbacks 373 * with the mac80211 subsystem. This should be performed prior to calling 374 * ieee80211_register_hw 375 * 376 */ 377 int iwl_mvm_rate_control_register(void); 378 379 /** 380 * iwl_rate_control_unregister - Unregister the rate control callbacks 381 * 382 * This should be called after calling ieee80211_unregister_hw, but before 383 * the driver is unloaded. 384 */ 385 void iwl_mvm_rate_control_unregister(void); 386 387 struct iwl_mvm_sta; 388 389 int iwl_mvm_tx_protection(struct iwl_mvm *mvm, struct iwl_mvm_sta *mvmsta, 390 bool enable); 391 392 #endif /* __rs__ */ 393