drivers/net/wireless/intel/iwlwifi/mvm/rs.h

   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  * Contact Information:
  10  *  Intel Linux Wireless <linuxwifi@intel.com>
  11  * Intel Corporation, 5200 N.E. Elam Young Parkway, Hillsboro, OR 97124-6497
  12  *
  13  *****************************************************************************/
  14
  15 #ifndef __rs_h__
  16 #define __rs_h__
  17
  18 #include <net/mac80211.h>
  19
  20 #include "iwl-config.h"
  21
  22 #include "fw-api.h"
  23 #include "iwl-trans.h"
  24
  25 #define RS_NAME "iwl-mvm-rs"
  26
  27 struct iwl_rs_rate_info {
  28         u8 plcp;          /* uCode API:  IWL_RATE_6M_PLCP, etc. */
  29         u8 plcp_ht_siso;  /* uCode API:  IWL_RATE_SISO_6M_PLCP, etc. */
  30         u8 plcp_ht_mimo2; /* uCode API:  IWL_RATE_MIMO2_6M_PLCP, etc. */
  31         u8 plcp_vht_siso;
  32         u8 plcp_vht_mimo2;
  33         u8 prev_rs;      /* previous rate used in rs algo */
  34         u8 next_rs;      /* next rate used in rs algo */
  35 };
  36
  37 #define IWL_RATE_60M_PLCP 3
  38
  39 enum {
  40         IWL_RATE_INVM_INDEX = IWL_RATE_COUNT,
  41         IWL_RATE_INVALID = IWL_RATE_COUNT,
  42 };
  43
  44 #define LINK_QUAL_MAX_RETRY_NUM 16
  45
  46 enum {
  47         IWL_RATE_6M_INDEX_TABLE = 0,
  48         IWL_RATE_9M_INDEX_TABLE,
  49         IWL_RATE_12M_INDEX_TABLE,
  50         IWL_RATE_18M_INDEX_TABLE,
  51         IWL_RATE_24M_INDEX_TABLE,
  52         IWL_RATE_36M_INDEX_TABLE,
  53         IWL_RATE_48M_INDEX_TABLE,
  54         IWL_RATE_54M_INDEX_TABLE,
  55         IWL_RATE_1M_INDEX_TABLE,
  56         IWL_RATE_2M_INDEX_TABLE,
  57         IWL_RATE_5M_INDEX_TABLE,
  58         IWL_RATE_11M_INDEX_TABLE,
  59         IWL_RATE_INVM_INDEX_TABLE = IWL_RATE_INVM_INDEX - 1,
  60 };
  61
  62 /* #define vs. enum to keep from defaulting to 'large integer' */
  63 #define IWL_RATE_6M_MASK   (1 << IWL_RATE_6M_INDEX)
  64 #define IWL_RATE_9M_MASK   (1 << IWL_RATE_9M_INDEX)
  65 #define IWL_RATE_12M_MASK  (1 << IWL_RATE_12M_INDEX)
  66 #define IWL_RATE_18M_MASK  (1 << IWL_RATE_18M_INDEX)
  67 #define IWL_RATE_24M_MASK  (1 << IWL_RATE_24M_INDEX)
  68 #define IWL_RATE_36M_MASK  (1 << IWL_RATE_36M_INDEX)
  69 #define IWL_RATE_48M_MASK  (1 << IWL_RATE_48M_INDEX)
  70 #define IWL_RATE_54M_MASK  (1 << IWL_RATE_54M_INDEX)
  71 #define IWL_RATE_60M_MASK  (1 << IWL_RATE_60M_INDEX)
  72 #define IWL_RATE_1M_MASK   (1 << IWL_RATE_1M_INDEX)
  73 #define IWL_RATE_2M_MASK   (1 << IWL_RATE_2M_INDEX)
  74 #define IWL_RATE_5M_MASK   (1 << IWL_RATE_5M_INDEX)
  75 #define IWL_RATE_11M_MASK  (1 << IWL_RATE_11M_INDEX)
  76
  77
  78 /* uCode API values for HT/VHT bit rates */
  79 enum {
  80         IWL_RATE_HT_SISO_MCS_0_PLCP = 0,
  81         IWL_RATE_HT_SISO_MCS_1_PLCP = 1,
  82         IWL_RATE_HT_SISO_MCS_2_PLCP = 2,
  83         IWL_RATE_HT_SISO_MCS_3_PLCP = 3,
  84         IWL_RATE_HT_SISO_MCS_4_PLCP = 4,
  85         IWL_RATE_HT_SISO_MCS_5_PLCP = 5,
  86         IWL_RATE_HT_SISO_MCS_6_PLCP = 6,
  87         IWL_RATE_HT_SISO_MCS_7_PLCP = 7,
  88         IWL_RATE_HT_MIMO2_MCS_0_PLCP = 0x8,
  89         IWL_RATE_HT_MIMO2_MCS_1_PLCP = 0x9,
  90         IWL_RATE_HT_MIMO2_MCS_2_PLCP = 0xA,
  91         IWL_RATE_HT_MIMO2_MCS_3_PLCP = 0xB,
  92         IWL_RATE_HT_MIMO2_MCS_4_PLCP = 0xC,
  93         IWL_RATE_HT_MIMO2_MCS_5_PLCP = 0xD,
  94         IWL_RATE_HT_MIMO2_MCS_6_PLCP = 0xE,
  95         IWL_RATE_HT_MIMO2_MCS_7_PLCP = 0xF,
  96         IWL_RATE_VHT_SISO_MCS_0_PLCP = 0,
  97         IWL_RATE_VHT_SISO_MCS_1_PLCP = 1,
  98         IWL_RATE_VHT_SISO_MCS_2_PLCP = 2,
  99         IWL_RATE_VHT_SISO_MCS_3_PLCP = 3,
 100         IWL_RATE_VHT_SISO_MCS_4_PLCP = 4,
 101         IWL_RATE_VHT_SISO_MCS_5_PLCP = 5,
 102         IWL_RATE_VHT_SISO_MCS_6_PLCP = 6,
 103         IWL_RATE_VHT_SISO_MCS_7_PLCP = 7,
 104         IWL_RATE_VHT_SISO_MCS_8_PLCP = 8,
 105         IWL_RATE_VHT_SISO_MCS_9_PLCP = 9,
 106         IWL_RATE_VHT_MIMO2_MCS_0_PLCP = 0x10,
 107         IWL_RATE_VHT_MIMO2_MCS_1_PLCP = 0x11,
 108         IWL_RATE_VHT_MIMO2_MCS_2_PLCP = 0x12,
 109         IWL_RATE_VHT_MIMO2_MCS_3_PLCP = 0x13,
 110         IWL_RATE_VHT_MIMO2_MCS_4_PLCP = 0x14,
 111         IWL_RATE_VHT_MIMO2_MCS_5_PLCP = 0x15,
 112         IWL_RATE_VHT_MIMO2_MCS_6_PLCP = 0x16,
 113         IWL_RATE_VHT_MIMO2_MCS_7_PLCP = 0x17,
 114         IWL_RATE_VHT_MIMO2_MCS_8_PLCP = 0x18,
 115         IWL_RATE_VHT_MIMO2_MCS_9_PLCP = 0x19,
 116         IWL_RATE_HT_SISO_MCS_INV_PLCP,
 117         IWL_RATE_HT_MIMO2_MCS_INV_PLCP = IWL_RATE_HT_SISO_MCS_INV_PLCP,
 118         IWL_RATE_VHT_SISO_MCS_INV_PLCP = IWL_RATE_HT_SISO_MCS_INV_PLCP,
 119         IWL_RATE_VHT_MIMO2_MCS_INV_PLCP = IWL_RATE_HT_SISO_MCS_INV_PLCP,
 120         IWL_RATE_HT_SISO_MCS_8_PLCP = IWL_RATE_HT_SISO_MCS_INV_PLCP,
 121         IWL_RATE_HT_SISO_MCS_9_PLCP = IWL_RATE_HT_SISO_MCS_INV_PLCP,
 122         IWL_RATE_HT_MIMO2_MCS_8_PLCP = IWL_RATE_HT_SISO_MCS_INV_PLCP,
 123         IWL_RATE_HT_MIMO2_MCS_9_PLCP = IWL_RATE_HT_SISO_MCS_INV_PLCP,
 124 };
 125
 126 #define IWL_RATES_MASK ((1 << IWL_RATE_COUNT) - 1)
 127
 128 #define IWL_INVALID_VALUE    -1
 129
 130 #define TPC_MAX_REDUCTION               15
 131 #define TPC_NO_REDUCTION                0
 132 #define TPC_INVALID                     0xff
 133
 134 #define LINK_QUAL_AGG_FRAME_LIMIT_DEF   (63)
 135 #define LINK_QUAL_AGG_FRAME_LIMIT_MAX   (63)
 136 /*
 137  * FIXME - various places in firmware API still use u8,
 138  * e.g. LQ command and SCD config command.
 139  * This should be 256 instead.
 140  */
 141 #define LINK_QUAL_AGG_FRAME_LIMIT_GEN2_DEF      (255)
 142 #define LINK_QUAL_AGG_FRAME_LIMIT_GEN2_MAX      (255)
 143 #define LINK_QUAL_AGG_FRAME_LIMIT_MIN   (0)
 144
 145 #define LQ_SIZE         2       /* 2 mode tables:  "Active" and "Search" */
 146
 147 /* load per tid defines for A-MPDU activation */
 148 #define IWL_AGG_TPT_THREHOLD    0
 149 #define IWL_AGG_ALL_TID         0xff
 150
 151 enum iwl_table_type {
 152         LQ_NONE,
 153         LQ_LEGACY_G,    /* legacy types */
 154         LQ_LEGACY_A,
 155         LQ_HT_SISO,     /* HT types */
 156         LQ_HT_MIMO2,
 157         LQ_VHT_SISO,    /* VHT types */
 158         LQ_VHT_MIMO2,
 159         LQ_HE_SISO,     /* HE types */
 160         LQ_HE_MIMO2,
 161         LQ_MAX,
 162 };
 163
 164 struct rs_rate {
 165         int index;
 166         enum iwl_table_type type;
 167         u8 ant;
 168         u32 bw;
 169         bool sgi;
 170         bool ldpc;
 171         bool stbc;
 172         bool bfer;
 173 };
 174
 175
 176 #define is_type_legacy(type) (((type) == LQ_LEGACY_G) || \
 177                               ((type) == LQ_LEGACY_A))
 178 #define is_type_ht_siso(type) ((type) == LQ_HT_SISO)
 179 #define is_type_ht_mimo2(type) ((type) == LQ_HT_MIMO2)
 180 #define is_type_vht_siso(type) ((type) == LQ_VHT_SISO)
 181 #define is_type_vht_mimo2(type) ((type) == LQ_VHT_MIMO2)
 182 #define is_type_he_siso(type) ((type) == LQ_HE_SISO)
 183 #define is_type_he_mimo2(type) ((type) == LQ_HE_MIMO2)
 184 #define is_type_siso(type) (is_type_ht_siso(type) || is_type_vht_siso(type) || \
 185                             is_type_he_siso(type))
 186 #define is_type_mimo2(type) (is_type_ht_mimo2(type) || \
 187                              is_type_vht_mimo2(type) || is_type_he_mimo2(type))
 188 #define is_type_mimo(type) (is_type_mimo2(type))
 189 #define is_type_ht(type) (is_type_ht_siso(type) || is_type_ht_mimo2(type))
 190 #define is_type_vht(type) (is_type_vht_siso(type) || is_type_vht_mimo2(type))
 191 #define is_type_he(type) (is_type_he_siso(type) || is_type_he_mimo2(type))
 192 #define is_type_a_band(type) ((type) == LQ_LEGACY_A)
 193 #define is_type_g_band(type) ((type) == LQ_LEGACY_G)
 194
 195 #define is_legacy(rate)       is_type_legacy((rate)->type)
 196 #define is_ht_siso(rate)      is_type_ht_siso((rate)->type)
 197 #define is_ht_mimo2(rate)     is_type_ht_mimo2((rate)->type)
 198 #define is_vht_siso(rate)     is_type_vht_siso((rate)->type)
 199 #define is_vht_mimo2(rate)    is_type_vht_mimo2((rate)->type)
 200 #define is_siso(rate)         is_type_siso((rate)->type)
 201 #define is_mimo2(rate)        is_type_mimo2((rate)->type)
 202 #define is_mimo(rate)         is_type_mimo((rate)->type)
 203 #define is_ht(rate)           is_type_ht((rate)->type)
 204 #define is_vht(rate)          is_type_vht((rate)->type)
 205 #define is_he(rate)           is_type_he((rate)->type)
 206 #define is_a_band(rate)       is_type_a_band((rate)->type)
 207 #define is_g_band(rate)       is_type_g_band((rate)->type)
 208
 209 #define is_ht20(rate)         ((rate)->bw == RATE_MCS_CHAN_WIDTH_20)
 210 #define is_ht40(rate)         ((rate)->bw == RATE_MCS_CHAN_WIDTH_40)
 211 #define is_ht80(rate)         ((rate)->bw == RATE_MCS_CHAN_WIDTH_80)
 212 #define is_ht160(rate)        ((rate)->bw == RATE_MCS_CHAN_WIDTH_160)
 213
 214 #define IWL_MAX_MCS_DISPLAY_SIZE        12
 215
 216 struct iwl_rate_mcs_info {
 217         char    mbps[IWL_MAX_MCS_DISPLAY_SIZE];
 218         char    mcs[IWL_MAX_MCS_DISPLAY_SIZE];
 219 };
 220
 221 /**
 222  * struct iwl_lq_sta_rs_fw - rate and related statistics for RS in FW
 223  * @last_rate_n_flags: last rate reported by FW
 224  * @sta_id: the id of the station
 225 #ifdef CONFIG_MAC80211_DEBUGFS
 226  * @dbg_fixed_rate: for debug, use fixed rate if not 0
 227  * @dbg_agg_frame_count_lim: for debug, max number of frames in A-MPDU
 228 #endif
 229  * @chains: bitmask of chains reported in %chain_signal
 230  * @chain_signal: per chain signal strength
 231  * @last_rssi: last rssi reported
 232  * @drv: pointer back to the driver data
 233  */
 234
 235 struct iwl_lq_sta_rs_fw {
 236         /* last tx rate_n_flags */
 237         u32 last_rate_n_flags;
 238
 239         /* persistent fields - initialized only once - keep last! */
 240         struct lq_sta_pers_rs_fw {
 241                 u32 sta_id;
 242 #ifdef CONFIG_MAC80211_DEBUGFS
 243                 u32 dbg_fixed_rate;
 244                 u16 dbg_agg_frame_count_lim;
 245 #endif
 246                 u8 chains;
 247                 s8 chain_signal[IEEE80211_MAX_CHAINS];
 248                 s8 last_rssi;
 249                 struct iwl_mvm *drv;
 250         } pers;
 251 };
 252
 253 /**
 254  * struct iwl_rate_scale_data -- tx success history for one rate
 255  */
 256 struct iwl_rate_scale_data {
 257         u64 data;               /* bitmap of successful frames */
 258         s32 success_counter;    /* number of frames successful */
 259         s32 success_ratio;      /* per-cent * 128  */
 260         s32 counter;            /* number of frames attempted */
 261         s32 average_tpt;        /* success ratio * expected throughput */
 262 };
 263
 264 /* Possible Tx columns
 265  * Tx Column = a combo of legacy/siso/mimo x antenna x SGI
 266  */
 267 enum rs_column {
 268         RS_COLUMN_LEGACY_ANT_A = 0,
 269         RS_COLUMN_LEGACY_ANT_B,
 270         RS_COLUMN_SISO_ANT_A,
 271         RS_COLUMN_SISO_ANT_B,
 272         RS_COLUMN_SISO_ANT_A_SGI,
 273         RS_COLUMN_SISO_ANT_B_SGI,
 274         RS_COLUMN_MIMO2,
 275         RS_COLUMN_MIMO2_SGI,
 276
 277         RS_COLUMN_LAST = RS_COLUMN_MIMO2_SGI,
 278         RS_COLUMN_COUNT = RS_COLUMN_LAST + 1,
 279         RS_COLUMN_INVALID,
 280 };
 281
 282 enum rs_ss_force_opt {
 283         RS_SS_FORCE_NONE = 0,
 284         RS_SS_FORCE_STBC,
 285         RS_SS_FORCE_BFER,
 286         RS_SS_FORCE_SISO,
 287 };
 288
 289 /* Packet stats per rate */
 290 struct rs_rate_stats {
 291         u64 success;
 292         u64 total;
 293 };
 294
 295 /**
 296  * struct iwl_scale_tbl_info -- tx params and success history for all rates
 297  *
 298  * There are two of these in struct iwl_lq_sta,
 299  * one for "active", and one for "search".
 300  */
 301 struct iwl_scale_tbl_info {
 302         struct rs_rate rate;
 303         enum rs_column column;
 304         const u16 *expected_tpt;        /* throughput metrics; expected_tpt_G, etc. */
 305         struct iwl_rate_scale_data win[IWL_RATE_COUNT]; /* rate histories */
 306         /* per txpower-reduction history */
 307         struct iwl_rate_scale_data tpc_win[TPC_MAX_REDUCTION + 1];
 308 };
 309
 310 enum {
 311         RS_STATE_SEARCH_CYCLE_STARTED,
 312         RS_STATE_SEARCH_CYCLE_ENDED,
 313         RS_STATE_STAY_IN_COLUMN,
 314 };
 315
 316 /**
 317  * struct iwl_lq_sta -- driver's rate scaling private structure
 318  *
 319  * Pointer to this gets passed back and forth between driver and mac80211.
 320  */
 321 struct iwl_lq_sta {
 322         u8 active_tbl;          /* index of active table, range 0-1 */
 323         u8 rs_state;            /* RS_STATE_* */
 324         u8 search_better_tbl;   /* 1: currently trying alternate mode */
 325         s32 last_tpt;
 326
 327         /* The following determine when to search for a new mode */
 328         u32 table_count_limit;
 329         u32 max_failure_limit;  /* # failed frames before new search */
 330         u32 max_success_limit;  /* # successful frames before new search */
 331         u32 table_count;
 332         u32 total_failed;       /* total failed frames, any/all rates */
 333         u32 total_success;      /* total successful frames, any/all rates */
 334         u64 flush_timer;        /* time staying in mode before new search */
 335
 336         u32 visited_columns;    /* Bitmask marking which Tx columns were
 337                                  * explored during a search cycle
 338                                  */
 339         u64 last_tx;
 340         bool is_vht;
 341         bool ldpc;              /* LDPC Rx is supported by the STA */
 342         bool stbc_capable;      /* Tx STBC is supported by chip and Rx by STA */
 343         bool bfer_capable;      /* Remote supports beamformee and we BFer */
 344
 345         enum nl80211_band band;
 346
 347         /* The following are bitmaps of rates; IWL_RATE_6M_MASK, etc. */
 348         unsigned long active_legacy_rate;
 349         unsigned long active_siso_rate;
 350         unsigned long active_mimo2_rate;
 351
 352         /* Highest rate per Tx mode */
 353         u8 max_legacy_rate_idx;
 354         u8 max_siso_rate_idx;
 355         u8 max_mimo2_rate_idx;
 356
 357         /* Optimal rate based on RSSI and STA caps.
 358          * Used only to reflect link speed to userspace.
 359          */
 360         struct rs_rate optimal_rate;
 361         unsigned long optimal_rate_mask;
 362         const struct rs_init_rate_info *optimal_rates;
 363         int optimal_nentries;
 364
 365         u8 missed_rate_counter;
 366
 367         struct iwl_lq_cmd lq;
 368         struct iwl_scale_tbl_info lq_info[LQ_SIZE]; /* "active", "search" */
 369         u8 tx_agg_tid_en;
 370
 371         /* last tx rate_n_flags */
 372         u32 last_rate_n_flags;
 373         /* packets destined for this STA are aggregated */
 374         u8 is_agg;
 375
 376         /* tx power reduce for this sta */
 377         int tpc_reduce;
 378
 379         /* persistent fields - initialized only once - keep last! */
 380         struct lq_sta_pers {
 381 #ifdef CONFIG_MAC80211_DEBUGFS
 382                 u32 dbg_fixed_rate;
 383                 u8 dbg_fixed_txp_reduction;
 384
 385                 /* force STBC/BFER/SISO for testing */
 386                 enum rs_ss_force_opt ss_force;
 387 #endif
 388                 u8 chains;
 389                 s8 chain_signal[IEEE80211_MAX_CHAINS];
 390                 s8 last_rssi;
 391                 struct rs_rate_stats tx_stats[RS_COLUMN_COUNT][IWL_RATE_COUNT];
 392                 struct iwl_mvm *drv;
 393                 spinlock_t lock; /* for races in reinit/update table */
 394         } pers;
 395 };
 396
 397 /* ieee80211_tx_info's status_driver_data[0] is packed with lq color and txp
 398  * Note, it's iwlmvm <-> mac80211 interface.
 399  * bits 0-7: reduced tx power
 400  * bits 8-10: LQ command's color
 401  */
 402 #define RS_DRV_DATA_TXP_MSK 0xff
 403 #define RS_DRV_DATA_LQ_COLOR_POS 8
 404 #define RS_DRV_DATA_LQ_COLOR_MSK (7 << RS_DRV_DATA_LQ_COLOR_POS)
 405 #define RS_DRV_DATA_LQ_COLOR_GET(_f) (((_f) & RS_DRV_DATA_LQ_COLOR_MSK) >>\
 406                                       RS_DRV_DATA_LQ_COLOR_POS)
 407 #define RS_DRV_DATA_PACK(_c, _p) ((void *)(uintptr_t)\
 408                                   (((uintptr_t)_p) |\
 409                                    ((_c) << RS_DRV_DATA_LQ_COLOR_POS)))
 410
 411 /* Initialize station's rate scaling information after adding station */
 412 void iwl_mvm_rs_rate_init(struct iwl_mvm *mvm, struct ieee80211_sta *sta,
 413                           enum nl80211_band band, bool init);
 414
 415 /* Notify RS about Tx status */
 416 void iwl_mvm_rs_tx_status(struct iwl_mvm *mvm, struct ieee80211_sta *sta,
 417                           int tid, struct ieee80211_tx_info *info, bool ndp);
 418
 419 /**
 420  * iwl_rate_control_register - Register the rate control algorithm callbacks
 421  *
 422  * Since the rate control algorithm is hardware specific, there is no need
 423  * or reason to place it as a stand alone module.  The driver can call
 424  * iwl_rate_control_register in order to register the rate control callbacks
 425  * with the mac80211 subsystem.  This should be performed prior to calling
 426  * ieee80211_register_hw
 427  *
 428  */
 429 int iwl_mvm_rate_control_register(void);
 430
 431 /**
 432  * iwl_rate_control_unregister - Unregister the rate control callbacks
 433  *
 434  * This should be called after calling ieee80211_unregister_hw, but before
 435  * the driver is unloaded.
 436  */
 437 void iwl_mvm_rate_control_unregister(void);
 438
 439 struct iwl_mvm_sta;
 440
 441 int iwl_mvm_tx_protection(struct iwl_mvm *mvm, struct iwl_mvm_sta *mvmsta,
 442                           bool enable);
 443
 444 #ifdef CONFIG_IWLWIFI_DEBUGFS
 445 void iwl_mvm_reset_frame_stats(struct iwl_mvm *mvm);
 446 #endif
 447
 448 void iwl_mvm_rs_add_sta(struct iwl_mvm *mvm, struct iwl_mvm_sta *mvmsta);
 449 void rs_fw_rate_init(struct iwl_mvm *mvm, struct ieee80211_sta *sta,
 450                      enum nl80211_band band, bool update);
 451 int rs_fw_tx_protection(struct iwl_mvm *mvm, struct iwl_mvm_sta *mvmsta,
 452                         bool enable);
 453 void iwl_mvm_tlc_update_notif(struct iwl_mvm *mvm,
 454                               struct iwl_rx_cmd_buffer *rxb);
 455
 456 u16 rs_fw_get_max_amsdu_len(struct ieee80211_sta *sta);
 457 #endif /* __rs__ */