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

   1 /* SPDX-License-Identifier: GPL-2.0-only */
   2 /******************************************************************************
   3  *
   4  * Copyright(c) 2003 - 2014 Intel Corporation. All rights reserved.
   5  *
   6  * Contact Information:
   7  *  Intel Linux Wireless <linuxwifi@intel.com>
   8  * Intel Corporation, 5200 N.E. Elam Young Parkway, Hillsboro, OR 97124-6497
   9  *
  10  *****************************************************************************/
  11
  12 #ifndef __iwl_agn_rs_h__
  13 #define __iwl_agn_rs_h__
  14
  15 #include <net/mac80211.h>
  16
  17 #include "iwl-config.h"
  18
  19 #include "commands.h"
  20
  21 struct iwl_rate_info {
  22         u8 plcp;        /* uCode API:  IWL_RATE_6M_PLCP, etc. */
  23         u8 plcp_siso;   /* uCode API:  IWL_RATE_SISO_6M_PLCP, etc. */
  24         u8 plcp_mimo2;  /* uCode API:  IWL_RATE_MIMO2_6M_PLCP, etc. */
  25         u8 plcp_mimo3;  /* uCode API:  IWL_RATE_MIMO3_6M_PLCP, etc. */
  26         u8 ieee;        /* MAC header:  IWL_RATE_6M_IEEE, etc. */
  27         u8 prev_ieee;    /* previous rate in IEEE speeds */
  28         u8 next_ieee;    /* next rate in IEEE speeds */
  29         u8 prev_rs;      /* previous rate used in rs algo */
  30         u8 next_rs;      /* next rate used in rs algo */
  31         u8 prev_rs_tgg;  /* previous rate used in TGG rs algo */
  32         u8 next_rs_tgg;  /* next rate used in TGG rs algo */
  33 };
  34
  35 /*
  36  * These serve as indexes into
  37  * struct iwl_rate_info iwl_rates[IWL_RATE_COUNT];
  38  */
  39 enum {
  40         IWL_RATE_1M_INDEX = 0,
  41         IWL_RATE_2M_INDEX,
  42         IWL_RATE_5M_INDEX,
  43         IWL_RATE_11M_INDEX,
  44         IWL_RATE_6M_INDEX,
  45         IWL_RATE_9M_INDEX,
  46         IWL_RATE_12M_INDEX,
  47         IWL_RATE_18M_INDEX,
  48         IWL_RATE_24M_INDEX,
  49         IWL_RATE_36M_INDEX,
  50         IWL_RATE_48M_INDEX,
  51         IWL_RATE_54M_INDEX,
  52         IWL_RATE_60M_INDEX,
  53         IWL_RATE_COUNT, /*FIXME:RS:change to IWL_RATE_INDEX_COUNT,*/
  54         IWL_RATE_COUNT_LEGACY = IWL_RATE_COUNT - 1,     /* Excluding 60M */
  55         IWL_RATE_INVM_INDEX = IWL_RATE_COUNT,
  56         IWL_RATE_INVALID = IWL_RATE_COUNT,
  57 };
  58
  59 enum {
  60         IWL_RATE_6M_INDEX_TABLE = 0,
  61         IWL_RATE_9M_INDEX_TABLE,
  62         IWL_RATE_12M_INDEX_TABLE,
  63         IWL_RATE_18M_INDEX_TABLE,
  64         IWL_RATE_24M_INDEX_TABLE,
  65         IWL_RATE_36M_INDEX_TABLE,
  66         IWL_RATE_48M_INDEX_TABLE,
  67         IWL_RATE_54M_INDEX_TABLE,
  68         IWL_RATE_1M_INDEX_TABLE,
  69         IWL_RATE_2M_INDEX_TABLE,
  70         IWL_RATE_5M_INDEX_TABLE,
  71         IWL_RATE_11M_INDEX_TABLE,
  72         IWL_RATE_INVM_INDEX_TABLE = IWL_RATE_INVM_INDEX - 1,
  73 };
  74
  75 enum {
  76         IWL_FIRST_OFDM_RATE = IWL_RATE_6M_INDEX,
  77         IWL_LAST_OFDM_RATE = IWL_RATE_60M_INDEX,
  78         IWL_FIRST_CCK_RATE = IWL_RATE_1M_INDEX,
  79         IWL_LAST_CCK_RATE = IWL_RATE_11M_INDEX,
  80 };
  81
  82 /* #define vs. enum to keep from defaulting to 'large integer' */
  83 #define IWL_RATE_6M_MASK   (1 << IWL_RATE_6M_INDEX)
  84 #define IWL_RATE_9M_MASK   (1 << IWL_RATE_9M_INDEX)
  85 #define IWL_RATE_12M_MASK  (1 << IWL_RATE_12M_INDEX)
  86 #define IWL_RATE_18M_MASK  (1 << IWL_RATE_18M_INDEX)
  87 #define IWL_RATE_24M_MASK  (1 << IWL_RATE_24M_INDEX)
  88 #define IWL_RATE_36M_MASK  (1 << IWL_RATE_36M_INDEX)
  89 #define IWL_RATE_48M_MASK  (1 << IWL_RATE_48M_INDEX)
  90 #define IWL_RATE_54M_MASK  (1 << IWL_RATE_54M_INDEX)
  91 #define IWL_RATE_60M_MASK  (1 << IWL_RATE_60M_INDEX)
  92 #define IWL_RATE_1M_MASK   (1 << IWL_RATE_1M_INDEX)
  93 #define IWL_RATE_2M_MASK   (1 << IWL_RATE_2M_INDEX)
  94 #define IWL_RATE_5M_MASK   (1 << IWL_RATE_5M_INDEX)
  95 #define IWL_RATE_11M_MASK  (1 << IWL_RATE_11M_INDEX)
  96
  97 /* uCode API values for legacy bit rates, both OFDM and CCK */
  98 enum {
  99         IWL_RATE_6M_PLCP  = 13,
 100         IWL_RATE_9M_PLCP  = 15,
 101         IWL_RATE_12M_PLCP = 5,
 102         IWL_RATE_18M_PLCP = 7,
 103         IWL_RATE_24M_PLCP = 9,
 104         IWL_RATE_36M_PLCP = 11,
 105         IWL_RATE_48M_PLCP = 1,
 106         IWL_RATE_54M_PLCP = 3,
 107         IWL_RATE_60M_PLCP = 3,/*FIXME:RS:should be removed*/
 108         IWL_RATE_1M_PLCP  = 10,
 109         IWL_RATE_2M_PLCP  = 20,
 110         IWL_RATE_5M_PLCP  = 55,
 111         IWL_RATE_11M_PLCP = 110,
 112         /*FIXME:RS:change to IWL_RATE_LEGACY_??M_PLCP */
 113         /*FIXME:RS:add IWL_RATE_LEGACY_INVM_PLCP = 0,*/
 114 };
 115
 116 /* uCode API values for OFDM high-throughput (HT) bit rates */
 117 enum {
 118         IWL_RATE_SISO_6M_PLCP = 0,
 119         IWL_RATE_SISO_12M_PLCP = 1,
 120         IWL_RATE_SISO_18M_PLCP = 2,
 121         IWL_RATE_SISO_24M_PLCP = 3,
 122         IWL_RATE_SISO_36M_PLCP = 4,
 123         IWL_RATE_SISO_48M_PLCP = 5,
 124         IWL_RATE_SISO_54M_PLCP = 6,
 125         IWL_RATE_SISO_60M_PLCP = 7,
 126         IWL_RATE_MIMO2_6M_PLCP  = 0x8,
 127         IWL_RATE_MIMO2_12M_PLCP = 0x9,
 128         IWL_RATE_MIMO2_18M_PLCP = 0xa,
 129         IWL_RATE_MIMO2_24M_PLCP = 0xb,
 130         IWL_RATE_MIMO2_36M_PLCP = 0xc,
 131         IWL_RATE_MIMO2_48M_PLCP = 0xd,
 132         IWL_RATE_MIMO2_54M_PLCP = 0xe,
 133         IWL_RATE_MIMO2_60M_PLCP = 0xf,
 134         IWL_RATE_MIMO3_6M_PLCP  = 0x10,
 135         IWL_RATE_MIMO3_12M_PLCP = 0x11,
 136         IWL_RATE_MIMO3_18M_PLCP = 0x12,
 137         IWL_RATE_MIMO3_24M_PLCP = 0x13,
 138         IWL_RATE_MIMO3_36M_PLCP = 0x14,
 139         IWL_RATE_MIMO3_48M_PLCP = 0x15,
 140         IWL_RATE_MIMO3_54M_PLCP = 0x16,
 141         IWL_RATE_MIMO3_60M_PLCP = 0x17,
 142         IWL_RATE_SISO_INVM_PLCP,
 143         IWL_RATE_MIMO2_INVM_PLCP = IWL_RATE_SISO_INVM_PLCP,
 144         IWL_RATE_MIMO3_INVM_PLCP = IWL_RATE_SISO_INVM_PLCP,
 145 };
 146
 147 /* MAC header values for bit rates */
 148 enum {
 149         IWL_RATE_6M_IEEE  = 12,
 150         IWL_RATE_9M_IEEE  = 18,
 151         IWL_RATE_12M_IEEE = 24,
 152         IWL_RATE_18M_IEEE = 36,
 153         IWL_RATE_24M_IEEE = 48,
 154         IWL_RATE_36M_IEEE = 72,
 155         IWL_RATE_48M_IEEE = 96,
 156         IWL_RATE_54M_IEEE = 108,
 157         IWL_RATE_60M_IEEE = 120,
 158         IWL_RATE_1M_IEEE  = 2,
 159         IWL_RATE_2M_IEEE  = 4,
 160         IWL_RATE_5M_IEEE  = 11,
 161         IWL_RATE_11M_IEEE = 22,
 162 };
 163
 164 #define IWL_RATES_MASK ((1 << IWL_RATE_COUNT) - 1)
 165
 166 #define IWL_INVALID_VALUE    -1
 167
 168 #define IWL_MIN_RSSI_VAL                 -100
 169 #define IWL_MAX_RSSI_VAL                    0
 170
 171 /* These values specify how many Tx frame attempts before
 172  * searching for a new modulation mode */
 173 #define IWL_LEGACY_FAILURE_LIMIT        160
 174 #define IWL_LEGACY_SUCCESS_LIMIT        480
 175 #define IWL_LEGACY_TABLE_COUNT          160
 176
 177 #define IWL_NONE_LEGACY_FAILURE_LIMIT   400
 178 #define IWL_NONE_LEGACY_SUCCESS_LIMIT   4500
 179 #define IWL_NONE_LEGACY_TABLE_COUNT     1500
 180
 181 /* Success ratio (ACKed / attempted tx frames) values (perfect is 128 * 100) */
 182 #define IWL_RS_GOOD_RATIO               12800   /* 100% */
 183 #define IWL_RATE_SCALE_SWITCH           10880   /*  85% */
 184 #define IWL_RATE_HIGH_TH                10880   /*  85% */
 185 #define IWL_RATE_INCREASE_TH            6400    /*  50% */
 186 #define IWL_RATE_DECREASE_TH            1920    /*  15% */
 187
 188 /* possible actions when in legacy mode */
 189 #define IWL_LEGACY_SWITCH_ANTENNA1      0
 190 #define IWL_LEGACY_SWITCH_ANTENNA2      1
 191 #define IWL_LEGACY_SWITCH_SISO          2
 192 #define IWL_LEGACY_SWITCH_MIMO2_AB      3
 193 #define IWL_LEGACY_SWITCH_MIMO2_AC      4
 194 #define IWL_LEGACY_SWITCH_MIMO2_BC      5
 195 #define IWL_LEGACY_SWITCH_MIMO3_ABC     6
 196
 197 /* possible actions when in siso mode */
 198 #define IWL_SISO_SWITCH_ANTENNA1        0
 199 #define IWL_SISO_SWITCH_ANTENNA2        1
 200 #define IWL_SISO_SWITCH_MIMO2_AB        2
 201 #define IWL_SISO_SWITCH_MIMO2_AC        3
 202 #define IWL_SISO_SWITCH_MIMO2_BC        4
 203 #define IWL_SISO_SWITCH_GI              5
 204 #define IWL_SISO_SWITCH_MIMO3_ABC       6
 205
 206
 207 /* possible actions when in mimo mode */
 208 #define IWL_MIMO2_SWITCH_ANTENNA1       0
 209 #define IWL_MIMO2_SWITCH_ANTENNA2       1
 210 #define IWL_MIMO2_SWITCH_SISO_A         2
 211 #define IWL_MIMO2_SWITCH_SISO_B         3
 212 #define IWL_MIMO2_SWITCH_SISO_C         4
 213 #define IWL_MIMO2_SWITCH_GI             5
 214 #define IWL_MIMO2_SWITCH_MIMO3_ABC      6
 215
 216
 217 /* possible actions when in mimo3 mode */
 218 #define IWL_MIMO3_SWITCH_ANTENNA1       0
 219 #define IWL_MIMO3_SWITCH_ANTENNA2       1
 220 #define IWL_MIMO3_SWITCH_SISO_A         2
 221 #define IWL_MIMO3_SWITCH_SISO_B         3
 222 #define IWL_MIMO3_SWITCH_SISO_C         4
 223 #define IWL_MIMO3_SWITCH_MIMO2_AB       5
 224 #define IWL_MIMO3_SWITCH_MIMO2_AC       6
 225 #define IWL_MIMO3_SWITCH_MIMO2_BC       7
 226 #define IWL_MIMO3_SWITCH_GI             8
 227
 228
 229 #define IWL_MAX_11N_MIMO3_SEARCH IWL_MIMO3_SWITCH_GI
 230 #define IWL_MAX_SEARCH IWL_MIMO2_SWITCH_MIMO3_ABC
 231
 232 /*FIXME:RS:add possible actions for MIMO3*/
 233
 234 #define IWL_ACTION_LIMIT                3       /* # possible actions */
 235
 236 #define LQ_SIZE         2       /* 2 mode tables:  "Active" and "Search" */
 237
 238 /* load per tid defines for A-MPDU activation */
 239 #define IWL_AGG_TPT_THREHOLD    0
 240 #define IWL_AGG_LOAD_THRESHOLD  10
 241 #define IWL_AGG_ALL_TID         0xff
 242 #define TID_QUEUE_CELL_SPACING  50      /*mS */
 243 #define TID_QUEUE_MAX_SIZE      20
 244 #define TID_ROUND_VALUE         5       /* mS */
 245
 246 #define TID_MAX_TIME_DIFF ((TID_QUEUE_MAX_SIZE - 1) * TID_QUEUE_CELL_SPACING)
 247 #define TIME_WRAP_AROUND(x, y) (((y) > (x)) ? (y) - (x) : (0-(x)) + (y))
 248
 249 extern const struct iwl_rate_info iwl_rates[IWL_RATE_COUNT];
 250
 251 enum iwl_table_type {
 252         LQ_NONE,
 253         LQ_G,           /* legacy types */
 254         LQ_A,
 255         LQ_SISO,        /* high-throughput types */
 256         LQ_MIMO2,
 257         LQ_MIMO3,
 258         LQ_MAX,
 259 };
 260
 261 #define is_legacy(tbl) (((tbl) == LQ_G) || ((tbl) == LQ_A))
 262 #define is_siso(tbl) ((tbl) == LQ_SISO)
 263 #define is_mimo2(tbl) ((tbl) == LQ_MIMO2)
 264 #define is_mimo3(tbl) ((tbl) == LQ_MIMO3)
 265 #define is_mimo(tbl) (is_mimo2(tbl) || is_mimo3(tbl))
 266 #define is_Ht(tbl) (is_siso(tbl) || is_mimo(tbl))
 267 #define is_a_band(tbl) ((tbl) == LQ_A)
 268 #define is_g_and(tbl) ((tbl) == LQ_G)
 269
 270 #define IWL_MAX_MCS_DISPLAY_SIZE        12
 271
 272 struct iwl_rate_mcs_info {
 273         char    mbps[IWL_MAX_MCS_DISPLAY_SIZE];
 274         char    mcs[IWL_MAX_MCS_DISPLAY_SIZE];
 275 };
 276
 277 /**
 278  * struct iwl_rate_scale_data -- tx success history for one rate
 279  */
 280 struct iwl_rate_scale_data {
 281         u64 data;               /* bitmap of successful frames */
 282         s32 success_counter;    /* number of frames successful */
 283         s32 success_ratio;      /* per-cent * 128  */
 284         s32 counter;            /* number of frames attempted */
 285         s32 average_tpt;        /* success ratio * expected throughput */
 286         unsigned long stamp;
 287 };
 288
 289 /**
 290  * struct iwl_scale_tbl_info -- tx params and success history for all rates
 291  *
 292  * There are two of these in struct iwl_lq_sta,
 293  * one for "active", and one for "search".
 294  */
 295 struct iwl_scale_tbl_info {
 296         enum iwl_table_type lq_type;
 297         u8 ant_type;
 298         u8 is_SGI;      /* 1 = short guard interval */
 299         u8 is_ht40;     /* 1 = 40 MHz channel width */
 300         u8 is_dup;      /* 1 = duplicated data streams */
 301         u8 action;      /* change modulation; IWL_[LEGACY/SISO/MIMO]_SWITCH_* */
 302         u8 max_search;  /* maximun number of tables we can search */
 303         const u16 *expected_tpt;        /* throughput metrics; expected_tpt_G, etc. */
 304         u32 current_rate;  /* rate_n_flags, uCode API format */
 305         struct iwl_rate_scale_data win[IWL_RATE_COUNT]; /* rate histories */
 306 };
 307
 308 struct iwl_traffic_load {
 309         unsigned long time_stamp;       /* age of the oldest statistics */
 310         u32 packet_count[TID_QUEUE_MAX_SIZE];   /* packet count in this time
 311                                                  * slice */
 312         u32 total;                      /* total num of packets during the
 313                                          * last TID_MAX_TIME_DIFF */
 314         u8 queue_count;                 /* number of queues that has
 315                                          * been used since the last cleanup */
 316         u8 head;                        /* start of the circular buffer */
 317 };
 318
 319 /**
 320  * struct iwl_lq_sta -- driver's rate scaling private structure
 321  *
 322  * Pointer to this gets passed back and forth between driver and mac80211.
 323  */
 324 struct iwl_lq_sta {
 325         u8 active_tbl;          /* index of active table, range 0-1 */
 326         u8 enable_counter;      /* indicates HT mode */
 327         u8 stay_in_tbl;         /* 1: disallow, 0: allow search for new mode */
 328         u8 search_better_tbl;   /* 1: currently trying alternate mode */
 329         s32 last_tpt;
 330
 331         /* The following determine when to search for a new mode */
 332         u32 table_count_limit;
 333         u32 max_failure_limit;  /* # failed frames before new search */
 334         u32 max_success_limit;  /* # successful frames before new search */
 335         u32 table_count;
 336         u32 total_failed;       /* total failed frames, any/all rates */
 337         u32 total_success;      /* total successful frames, any/all rates */
 338         u64 flush_timer;        /* time staying in mode before new search */
 339
 340         u8 action_counter;      /* # mode-switch actions tried */
 341         u8 is_green;
 342         u8 is_dup;
 343         enum nl80211_band band;
 344
 345         /* The following are bitmaps of rates; IWL_RATE_6M_MASK, etc. */
 346         u32 supp_rates;
 347         u16 active_legacy_rate;
 348         u16 active_siso_rate;
 349         u16 active_mimo2_rate;
 350         u16 active_mimo3_rate;
 351         s8 max_rate_idx;     /* Max rate set by user */
 352         u8 missed_rate_counter;
 353
 354         struct iwl_link_quality_cmd lq;
 355         struct iwl_scale_tbl_info lq_info[LQ_SIZE]; /* "active", "search" */
 356         struct iwl_traffic_load load[IWL_MAX_TID_COUNT];
 357         u8 tx_agg_tid_en;
 358 #ifdef CONFIG_MAC80211_DEBUGFS
 359         u32 dbg_fixed_rate;
 360 #endif
 361         struct iwl_priv *drv;
 362
 363         /* used to be in sta_info */
 364         int last_txrate_idx;
 365         /* last tx rate_n_flags */
 366         u32 last_rate_n_flags;
 367         /* packets destined for this STA are aggregated */
 368         u8 is_agg;
 369         /* BT traffic this sta was last updated in */
 370         u8 last_bt_traffic;
 371 };
 372
 373 static inline u8 first_antenna(u8 mask)
 374 {
 375         if (mask & ANT_A)
 376                 return ANT_A;
 377         if (mask & ANT_B)
 378                 return ANT_B;
 379         return ANT_C;
 380 }
 381
 382
 383 /* Initialize station's rate scaling information after adding station */
 384 void iwl_rs_rate_init(struct iwl_priv *priv, struct ieee80211_sta *sta,
 385                       u8 sta_id);
 386
 387 /**
 388  * iwl_rate_control_register - Register the rate control algorithm callbacks
 389  *
 390  * Since the rate control algorithm is hardware specific, there is no need
 391  * or reason to place it as a stand alone module.  The driver can call
 392  * iwl_rate_control_register in order to register the rate control callbacks
 393  * with the mac80211 subsystem.  This should be performed prior to calling
 394  * ieee80211_register_hw
 395  *
 396  */
 397 int iwlagn_rate_control_register(void);
 398
 399 /**
 400  * iwl_rate_control_unregister - Unregister the rate control callbacks
 401  *
 402  * This should be called after calling ieee80211_unregister_hw, but before
 403  * the driver is unloaded.
 404  */
 405 void iwlagn_rate_control_unregister(void);
 406
 407 #endif /* __iwl_agn__rs__ */