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

   1 /* SPDX-License-Identifier: GPL-2.0-only */
   2 /******************************************************************************
   3  *
   4  * Copyright(c) 2003 - 2014, 2023 Intel Corporation. All rights reserved.
   5  *****************************************************************************/
   6
   7 #ifndef __iwl_agn_rs_h__
   8 #define __iwl_agn_rs_h__
   9
  10 #include <net/mac80211.h>
  11
  12 #include "iwl-config.h"
  13
  14 #include "commands.h"
  15
  16 struct iwl_rate_info {
  17         u8 plcp;        /* uCode API:  IWL_RATE_6M_PLCP, etc. */
  18         u8 plcp_siso;   /* uCode API:  IWL_RATE_SISO_6M_PLCP, etc. */
  19         u8 plcp_mimo2;  /* uCode API:  IWL_RATE_MIMO2_6M_PLCP, etc. */
  20         u8 plcp_mimo3;  /* uCode API:  IWL_RATE_MIMO3_6M_PLCP, etc. */
  21         u8 ieee;        /* MAC header:  IWL_RATE_6M_IEEE, etc. */
  22         u8 prev_ieee;    /* previous rate in IEEE speeds */
  23         u8 next_ieee;    /* next rate in IEEE speeds */
  24         u8 prev_rs;      /* previous rate used in rs algo */
  25         u8 next_rs;      /* next rate used in rs algo */
  26         u8 prev_rs_tgg;  /* previous rate used in TGG rs algo */
  27         u8 next_rs_tgg;  /* next rate used in TGG rs algo */
  28 };
  29
  30 /*
  31  * These serve as indexes into
  32  * struct iwl_rate_info iwl_rates[IWL_RATE_COUNT];
  33  */
  34 enum {
  35         IWL_RATE_1M_INDEX = 0,
  36         IWL_RATE_2M_INDEX,
  37         IWL_RATE_5M_INDEX,
  38         IWL_RATE_11M_INDEX,
  39         IWL_RATE_6M_INDEX,
  40         IWL_RATE_9M_INDEX,
  41         IWL_RATE_12M_INDEX,
  42         IWL_RATE_18M_INDEX,
  43         IWL_RATE_24M_INDEX,
  44         IWL_RATE_36M_INDEX,
  45         IWL_RATE_48M_INDEX,
  46         IWL_RATE_54M_INDEX,
  47         IWL_RATE_60M_INDEX,
  48         IWL_RATE_COUNT, /*FIXME:RS:change to IWL_RATE_INDEX_COUNT,*/
  49         IWL_RATE_COUNT_LEGACY = IWL_RATE_COUNT - 1,     /* Excluding 60M */
  50         IWL_RATE_INVM_INDEX = IWL_RATE_COUNT,
  51         IWL_RATE_INVALID = IWL_RATE_COUNT,
  52 };
  53
  54 enum {
  55         IWL_RATE_6M_INDEX_TABLE = 0,
  56         IWL_RATE_9M_INDEX_TABLE,
  57         IWL_RATE_12M_INDEX_TABLE,
  58         IWL_RATE_18M_INDEX_TABLE,
  59         IWL_RATE_24M_INDEX_TABLE,
  60         IWL_RATE_36M_INDEX_TABLE,
  61         IWL_RATE_48M_INDEX_TABLE,
  62         IWL_RATE_54M_INDEX_TABLE,
  63         IWL_RATE_1M_INDEX_TABLE,
  64         IWL_RATE_2M_INDEX_TABLE,
  65         IWL_RATE_5M_INDEX_TABLE,
  66         IWL_RATE_11M_INDEX_TABLE,
  67         IWL_RATE_INVM_INDEX_TABLE = IWL_RATE_INVM_INDEX - 1,
  68 };
  69
  70 enum {
  71         IWL_FIRST_OFDM_RATE = IWL_RATE_6M_INDEX,
  72         IWL_LAST_OFDM_RATE = IWL_RATE_60M_INDEX,
  73         IWL_FIRST_CCK_RATE = IWL_RATE_1M_INDEX,
  74         IWL_LAST_CCK_RATE = IWL_RATE_11M_INDEX,
  75 };
  76
  77 /* #define vs. enum to keep from defaulting to 'large integer' */
  78 #define IWL_RATE_6M_MASK   (1 << IWL_RATE_6M_INDEX)
  79 #define IWL_RATE_9M_MASK   (1 << IWL_RATE_9M_INDEX)
  80 #define IWL_RATE_12M_MASK  (1 << IWL_RATE_12M_INDEX)
  81 #define IWL_RATE_18M_MASK  (1 << IWL_RATE_18M_INDEX)
  82 #define IWL_RATE_24M_MASK  (1 << IWL_RATE_24M_INDEX)
  83 #define IWL_RATE_36M_MASK  (1 << IWL_RATE_36M_INDEX)
  84 #define IWL_RATE_48M_MASK  (1 << IWL_RATE_48M_INDEX)
  85 #define IWL_RATE_54M_MASK  (1 << IWL_RATE_54M_INDEX)
  86 #define IWL_RATE_60M_MASK  (1 << IWL_RATE_60M_INDEX)
  87 #define IWL_RATE_1M_MASK   (1 << IWL_RATE_1M_INDEX)
  88 #define IWL_RATE_2M_MASK   (1 << IWL_RATE_2M_INDEX)
  89 #define IWL_RATE_5M_MASK   (1 << IWL_RATE_5M_INDEX)
  90 #define IWL_RATE_11M_MASK  (1 << IWL_RATE_11M_INDEX)
  91
  92 /* uCode API values for legacy bit rates, both OFDM and CCK */
  93 enum {
  94         IWL_RATE_6M_PLCP  = 13,
  95         IWL_RATE_9M_PLCP  = 15,
  96         IWL_RATE_12M_PLCP = 5,
  97         IWL_RATE_18M_PLCP = 7,
  98         IWL_RATE_24M_PLCP = 9,
  99         IWL_RATE_36M_PLCP = 11,
 100         IWL_RATE_48M_PLCP = 1,
 101         IWL_RATE_54M_PLCP = 3,
 102         IWL_RATE_60M_PLCP = 3,/*FIXME:RS:should be removed*/
 103         IWL_RATE_1M_PLCP  = 10,
 104         IWL_RATE_2M_PLCP  = 20,
 105         IWL_RATE_5M_PLCP  = 55,
 106         IWL_RATE_11M_PLCP = 110,
 107         /*FIXME:RS:change to IWL_RATE_LEGACY_??M_PLCP */
 108         /*FIXME:RS:add IWL_RATE_LEGACY_INVM_PLCP = 0,*/
 109 };
 110
 111 /* uCode API values for OFDM high-throughput (HT) bit rates */
 112 enum {
 113         IWL_RATE_SISO_6M_PLCP = 0,
 114         IWL_RATE_SISO_12M_PLCP = 1,
 115         IWL_RATE_SISO_18M_PLCP = 2,
 116         IWL_RATE_SISO_24M_PLCP = 3,
 117         IWL_RATE_SISO_36M_PLCP = 4,
 118         IWL_RATE_SISO_48M_PLCP = 5,
 119         IWL_RATE_SISO_54M_PLCP = 6,
 120         IWL_RATE_SISO_60M_PLCP = 7,
 121         IWL_RATE_MIMO2_6M_PLCP  = 0x8,
 122         IWL_RATE_MIMO2_12M_PLCP = 0x9,
 123         IWL_RATE_MIMO2_18M_PLCP = 0xa,
 124         IWL_RATE_MIMO2_24M_PLCP = 0xb,
 125         IWL_RATE_MIMO2_36M_PLCP = 0xc,
 126         IWL_RATE_MIMO2_48M_PLCP = 0xd,
 127         IWL_RATE_MIMO2_54M_PLCP = 0xe,
 128         IWL_RATE_MIMO2_60M_PLCP = 0xf,
 129         IWL_RATE_MIMO3_6M_PLCP  = 0x10,
 130         IWL_RATE_MIMO3_12M_PLCP = 0x11,
 131         IWL_RATE_MIMO3_18M_PLCP = 0x12,
 132         IWL_RATE_MIMO3_24M_PLCP = 0x13,
 133         IWL_RATE_MIMO3_36M_PLCP = 0x14,
 134         IWL_RATE_MIMO3_48M_PLCP = 0x15,
 135         IWL_RATE_MIMO3_54M_PLCP = 0x16,
 136         IWL_RATE_MIMO3_60M_PLCP = 0x17,
 137         IWL_RATE_SISO_INVM_PLCP,
 138         IWL_RATE_MIMO2_INVM_PLCP = IWL_RATE_SISO_INVM_PLCP,
 139         IWL_RATE_MIMO3_INVM_PLCP = IWL_RATE_SISO_INVM_PLCP,
 140 };
 141
 142 /* MAC header values for bit rates */
 143 enum {
 144         IWL_RATE_6M_IEEE  = 12,
 145         IWL_RATE_9M_IEEE  = 18,
 146         IWL_RATE_12M_IEEE = 24,
 147         IWL_RATE_18M_IEEE = 36,
 148         IWL_RATE_24M_IEEE = 48,
 149         IWL_RATE_36M_IEEE = 72,
 150         IWL_RATE_48M_IEEE = 96,
 151         IWL_RATE_54M_IEEE = 108,
 152         IWL_RATE_60M_IEEE = 120,
 153         IWL_RATE_1M_IEEE  = 2,
 154         IWL_RATE_2M_IEEE  = 4,
 155         IWL_RATE_5M_IEEE  = 11,
 156         IWL_RATE_11M_IEEE = 22,
 157 };
 158
 159 #define IWL_RATES_MASK ((1 << IWL_RATE_COUNT) - 1)
 160
 161 #define IWL_INVALID_VALUE    -1
 162
 163 #define IWL_MIN_RSSI_VAL                 -100
 164 #define IWL_MAX_RSSI_VAL                    0
 165
 166 /* These values specify how many Tx frame attempts before
 167  * searching for a new modulation mode */
 168 #define IWL_LEGACY_FAILURE_LIMIT        160
 169 #define IWL_LEGACY_SUCCESS_LIMIT        480
 170 #define IWL_LEGACY_TABLE_COUNT          160
 171
 172 #define IWL_NONE_LEGACY_FAILURE_LIMIT   400
 173 #define IWL_NONE_LEGACY_SUCCESS_LIMIT   4500
 174 #define IWL_NONE_LEGACY_TABLE_COUNT     1500
 175
 176 /* Success ratio (ACKed / attempted tx frames) values (perfect is 128 * 100) */
 177 #define IWL_RS_GOOD_RATIO               12800   /* 100% */
 178 #define IWL_RATE_SCALE_SWITCH           10880   /*  85% */
 179 #define IWL_RATE_HIGH_TH                10880   /*  85% */
 180 #define IWL_RATE_INCREASE_TH            6400    /*  50% */
 181 #define IWL_RATE_DECREASE_TH            1920    /*  15% */
 182
 183 /* possible actions when in legacy mode */
 184 #define IWL_LEGACY_SWITCH_ANTENNA1      0
 185 #define IWL_LEGACY_SWITCH_ANTENNA2      1
 186 #define IWL_LEGACY_SWITCH_SISO          2
 187 #define IWL_LEGACY_SWITCH_MIMO2_AB      3
 188 #define IWL_LEGACY_SWITCH_MIMO2_AC      4
 189 #define IWL_LEGACY_SWITCH_MIMO2_BC      5
 190 #define IWL_LEGACY_SWITCH_MIMO3_ABC     6
 191
 192 /* possible actions when in siso mode */
 193 #define IWL_SISO_SWITCH_ANTENNA1        0
 194 #define IWL_SISO_SWITCH_ANTENNA2        1
 195 #define IWL_SISO_SWITCH_MIMO2_AB        2
 196 #define IWL_SISO_SWITCH_MIMO2_AC        3
 197 #define IWL_SISO_SWITCH_MIMO2_BC        4
 198 #define IWL_SISO_SWITCH_GI              5
 199 #define IWL_SISO_SWITCH_MIMO3_ABC       6
 200
 201
 202 /* possible actions when in mimo mode */
 203 #define IWL_MIMO2_SWITCH_ANTENNA1       0
 204 #define IWL_MIMO2_SWITCH_ANTENNA2       1
 205 #define IWL_MIMO2_SWITCH_SISO_A         2
 206 #define IWL_MIMO2_SWITCH_SISO_B         3
 207 #define IWL_MIMO2_SWITCH_SISO_C         4
 208 #define IWL_MIMO2_SWITCH_GI             5
 209 #define IWL_MIMO2_SWITCH_MIMO3_ABC      6
 210
 211
 212 /* possible actions when in mimo3 mode */
 213 #define IWL_MIMO3_SWITCH_ANTENNA1       0
 214 #define IWL_MIMO3_SWITCH_ANTENNA2       1
 215 #define IWL_MIMO3_SWITCH_SISO_A         2
 216 #define IWL_MIMO3_SWITCH_SISO_B         3
 217 #define IWL_MIMO3_SWITCH_SISO_C         4
 218 #define IWL_MIMO3_SWITCH_MIMO2_AB       5
 219 #define IWL_MIMO3_SWITCH_MIMO2_AC       6
 220 #define IWL_MIMO3_SWITCH_MIMO2_BC       7
 221 #define IWL_MIMO3_SWITCH_GI             8
 222
 223
 224 #define IWL_MAX_11N_MIMO3_SEARCH IWL_MIMO3_SWITCH_GI
 225 #define IWL_MAX_SEARCH IWL_MIMO2_SWITCH_MIMO3_ABC
 226
 227 /*FIXME:RS:add possible actions for MIMO3*/
 228
 229 #define IWL_ACTION_LIMIT                3       /* # possible actions */
 230
 231 #define LQ_SIZE         2       /* 2 mode tables:  "Active" and "Search" */
 232
 233 /* load per tid defines for A-MPDU activation */
 234 #define IWL_AGG_TPT_THREHOLD    0
 235 #define IWL_AGG_LOAD_THRESHOLD  10
 236 #define IWL_AGG_ALL_TID         0xff
 237 #define TID_QUEUE_CELL_SPACING  50      /*mS */
 238 #define TID_QUEUE_MAX_SIZE      20
 239 #define TID_ROUND_VALUE         5       /* mS */
 240
 241 #define TID_MAX_TIME_DIFF ((TID_QUEUE_MAX_SIZE - 1) * TID_QUEUE_CELL_SPACING)
 242 #define TIME_WRAP_AROUND(x, y) (((y) > (x)) ? (y) - (x) : (0-(x)) + (y))
 243
 244 extern const struct iwl_rate_info iwl_rates[IWL_RATE_COUNT];
 245
 246 enum iwl_table_type {
 247         LQ_NONE,
 248         LQ_G,           /* legacy types */
 249         LQ_A,
 250         LQ_SISO,        /* high-throughput types */
 251         LQ_MIMO2,
 252         LQ_MIMO3,
 253         LQ_MAX,
 254 };
 255
 256 #define is_legacy(tbl) (((tbl) == LQ_G) || ((tbl) == LQ_A))
 257 #define is_siso(tbl) ((tbl) == LQ_SISO)
 258 #define is_mimo2(tbl) ((tbl) == LQ_MIMO2)
 259 #define is_mimo3(tbl) ((tbl) == LQ_MIMO3)
 260 #define is_mimo(tbl) (is_mimo2(tbl) || is_mimo3(tbl))
 261 #define is_Ht(tbl) (is_siso(tbl) || is_mimo(tbl))
 262 #define is_a_band(tbl) ((tbl) == LQ_A)
 263 #define is_g_and(tbl) ((tbl) == LQ_G)
 264
 265 #define IWL_MAX_MCS_DISPLAY_SIZE        12
 266
 267 struct iwl_rate_mcs_info {
 268         char    mbps[IWL_MAX_MCS_DISPLAY_SIZE];
 269         char    mcs[IWL_MAX_MCS_DISPLAY_SIZE];
 270 };
 271
 272 /*
 273  * struct iwl_rate_scale_data -- tx success history for one rate
 274  */
 275 struct iwl_rate_scale_data {
 276         u64 data;               /* bitmap of successful frames */
 277         s32 success_counter;    /* number of frames successful */
 278         s32 success_ratio;      /* per-cent * 128  */
 279         s32 counter;            /* number of frames attempted */
 280         s32 average_tpt;        /* success ratio * expected throughput */
 281         unsigned long stamp;
 282 };
 283
 284 /*
 285  * struct iwl_scale_tbl_info -- tx params and success history for all rates
 286  *
 287  * There are two of these in struct iwl_lq_sta,
 288  * one for "active", and one for "search".
 289  */
 290 struct iwl_scale_tbl_info {
 291         enum iwl_table_type lq_type;
 292         u8 ant_type;
 293         u8 is_SGI;      /* 1 = short guard interval */
 294         u8 is_ht40;     /* 1 = 40 MHz channel width */
 295         u8 is_dup;      /* 1 = duplicated data streams */
 296         u8 action;      /* change modulation; IWL_[LEGACY/SISO/MIMO]_SWITCH_* */
 297         u8 max_search;  /* maximun number of tables we can search */
 298         const u16 *expected_tpt;        /* throughput metrics; expected_tpt_G, etc. */
 299         u32 current_rate;  /* rate_n_flags, uCode API format */
 300         struct iwl_rate_scale_data win[IWL_RATE_COUNT]; /* rate histories */
 301 };
 302
 303 struct iwl_traffic_load {
 304         unsigned long time_stamp;       /* age of the oldest statistics */
 305         u32 packet_count[TID_QUEUE_MAX_SIZE];   /* packet count in this time
 306                                                  * slice */
 307         u32 total;                      /* total num of packets during the
 308                                          * last TID_MAX_TIME_DIFF */
 309         u8 queue_count;                 /* number of queues that has
 310                                          * been used since the last cleanup */
 311         u8 head;                        /* start of the circular buffer */
 312 };
 313
 314 /*
 315  * struct iwl_lq_sta -- driver's rate scaling private structure
 316  *
 317  * Pointer to this gets passed back and forth between driver and mac80211.
 318  */
 319 struct iwl_lq_sta {
 320         u8 active_tbl;          /* index of active table, range 0-1 */
 321         u8 enable_counter;      /* indicates HT mode */
 322         u8 stay_in_tbl;         /* 1: disallow, 0: allow search for new mode */
 323         u8 search_better_tbl;   /* 1: currently trying alternate mode */
 324         s32 last_tpt;
 325
 326         /* The following determine when to search for a new mode */
 327         u32 table_count_limit;
 328         u32 max_failure_limit;  /* # failed frames before new search */
 329         u32 max_success_limit;  /* # successful frames before new search */
 330         u32 table_count;
 331         u32 total_failed;       /* total failed frames, any/all rates */
 332         u32 total_success;      /* total successful frames, any/all rates */
 333         u64 flush_timer;        /* time staying in mode before new search */
 334
 335         u8 action_counter;      /* # mode-switch actions tried */
 336         u8 is_green;
 337         u8 is_dup;
 338         enum nl80211_band band;
 339
 340         /* The following are bitmaps of rates; IWL_RATE_6M_MASK, etc. */
 341         u32 supp_rates;
 342         u16 active_legacy_rate;
 343         u16 active_siso_rate;
 344         u16 active_mimo2_rate;
 345         u16 active_mimo3_rate;
 346         s8 max_rate_idx;     /* Max rate set by user */
 347         u8 missed_rate_counter;
 348
 349         struct iwl_link_quality_cmd lq;
 350         struct iwl_scale_tbl_info lq_info[LQ_SIZE]; /* "active", "search" */
 351         struct iwl_traffic_load load[IWL_MAX_TID_COUNT];
 352         u8 tx_agg_tid_en;
 353 #ifdef CONFIG_MAC80211_DEBUGFS
 354         u32 dbg_fixed_rate;
 355 #endif
 356         struct iwl_priv *drv;
 357
 358         /* used to be in sta_info */
 359         int last_txrate_idx;
 360         /* last tx rate_n_flags */
 361         u32 last_rate_n_flags;
 362         /* packets destined for this STA are aggregated */
 363         u8 is_agg;
 364         /* BT traffic this sta was last updated in */
 365         u8 last_bt_traffic;
 366 };
 367
 368 static inline u8 first_antenna(u8 mask)
 369 {
 370         if (mask & ANT_A)
 371                 return ANT_A;
 372         if (mask & ANT_B)
 373                 return ANT_B;
 374         return ANT_C;
 375 }
 376
 377
 378 /* Initialize station's rate scaling information after adding station */
 379 void iwl_rs_rate_init(struct iwl_priv *priv, struct ieee80211_sta *sta,
 380                       u8 sta_id);
 381
 382 /*
 383  * iwl_rate_control_register - Register the rate control algorithm callbacks
 384  *
 385  * Since the rate control algorithm is hardware specific, there is no need
 386  * or reason to place it as a stand alone module.  The driver can call
 387  * iwl_rate_control_register in order to register the rate control callbacks
 388  * with the mac80211 subsystem.  This should be performed prior to calling
 389  * ieee80211_register_hw
 390  *
 391  */
 392 int iwlagn_rate_control_register(void);
 393
 394 /*
 395  * iwl_rate_control_unregister - Unregister the rate control callbacks
 396  *
 397  * This should be called after calling ieee80211_unregister_hw, but before
 398  * the driver is unloaded.
 399  */
 400 void iwlagn_rate_control_unregister(void);
 401
 402 #endif /* __iwl_agn__rs__ */