drivers/net/wireless/iwlwifi/iwl-agn-rs.h

   1 /******************************************************************************
   2  *
   3  * Copyright(c) 2003 - 2011 Intel Corporation. All rights reserved.
   4  *
   5  * This program is free software; you can redistribute it and/or modify it
   6  * under the terms of version 2 of the GNU General Public License as
   7  * published by the Free Software Foundation.
   8  *
   9  * This program is distributed in the hope that it will be useful, but WITHOUT
  10  * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
  11  * FITNESS FOR A PARTICULAR PURPOSE.  See the GNU General Public License for
  12  * more details.
  13  *
  14  * You should have received a copy of the GNU General Public License along with
  15  * this program; if not, write to the Free Software Foundation, Inc.,
  16  * 51 Franklin Street, Fifth Floor, Boston, MA 02110, USA
  17  *
  18  * The full GNU General Public License is included in this distribution in the
  19  * file called LICENSE.
  20  *
  21  * Contact Information:
  22  *  Intel Linux Wireless <ilw@linux.intel.com>
  23  * Intel Corporation, 5200 N.E. Elam Young Parkway, Hillsboro, OR 97124-6497
  24  *
  25  *****************************************************************************/
  26
  27 #ifndef __iwl_agn_rs_h__
  28 #define __iwl_agn_rs_h__
  29
  30 struct iwl_rate_info {
  31         u8 plcp;        /* uCode API:  IWL_RATE_6M_PLCP, etc. */
  32         u8 plcp_siso;   /* uCode API:  IWL_RATE_SISO_6M_PLCP, etc. */
  33         u8 plcp_mimo2;  /* uCode API:  IWL_RATE_MIMO2_6M_PLCP, etc. */
  34         u8 plcp_mimo3;  /* uCode API:  IWL_RATE_MIMO3_6M_PLCP, etc. */
  35         u8 ieee;        /* MAC header:  IWL_RATE_6M_IEEE, etc. */
  36         u8 prev_ieee;    /* previous rate in IEEE speeds */
  37         u8 next_ieee;    /* next rate in IEEE speeds */
  38         u8 prev_rs;      /* previous rate used in rs algo */
  39         u8 next_rs;      /* next rate used in rs algo */
  40         u8 prev_rs_tgg;  /* previous rate used in TGG rs algo */
  41         u8 next_rs_tgg;  /* next rate used in TGG rs algo */
  42 };
  43
  44 /*
  45  * These serve as indexes into
  46  * struct iwl_rate_info iwl_rates[IWL_RATE_COUNT];
  47  */
  48 enum {
  49         IWL_RATE_1M_INDEX = 0,
  50         IWL_RATE_2M_INDEX,
  51         IWL_RATE_5M_INDEX,
  52         IWL_RATE_11M_INDEX,
  53         IWL_RATE_6M_INDEX,
  54         IWL_RATE_9M_INDEX,
  55         IWL_RATE_12M_INDEX,
  56         IWL_RATE_18M_INDEX,
  57         IWL_RATE_24M_INDEX,
  58         IWL_RATE_36M_INDEX,
  59         IWL_RATE_48M_INDEX,
  60         IWL_RATE_54M_INDEX,
  61         IWL_RATE_60M_INDEX,
  62         IWL_RATE_COUNT, /*FIXME:RS:change to IWL_RATE_INDEX_COUNT,*/
  63         IWL_RATE_COUNT_LEGACY = IWL_RATE_COUNT - 1,     /* Excluding 60M */
  64         IWL_RATE_INVM_INDEX = IWL_RATE_COUNT,
  65         IWL_RATE_INVALID = IWL_RATE_COUNT,
  66 };
  67
  68 enum {
  69         IWL_RATE_6M_INDEX_TABLE = 0,
  70         IWL_RATE_9M_INDEX_TABLE,
  71         IWL_RATE_12M_INDEX_TABLE,
  72         IWL_RATE_18M_INDEX_TABLE,
  73         IWL_RATE_24M_INDEX_TABLE,
  74         IWL_RATE_36M_INDEX_TABLE,
  75         IWL_RATE_48M_INDEX_TABLE,
  76         IWL_RATE_54M_INDEX_TABLE,
  77         IWL_RATE_1M_INDEX_TABLE,
  78         IWL_RATE_2M_INDEX_TABLE,
  79         IWL_RATE_5M_INDEX_TABLE,
  80         IWL_RATE_11M_INDEX_TABLE,
  81         IWL_RATE_INVM_INDEX_TABLE = IWL_RATE_INVM_INDEX - 1,
  82 };
  83
  84 enum {
  85         IWL_FIRST_OFDM_RATE = IWL_RATE_6M_INDEX,
  86         IWL_LAST_OFDM_RATE = IWL_RATE_60M_INDEX,
  87         IWL_FIRST_CCK_RATE = IWL_RATE_1M_INDEX,
  88         IWL_LAST_CCK_RATE = IWL_RATE_11M_INDEX,
  89 };
  90
  91 /* #define vs. enum to keep from defaulting to 'large integer' */
  92 #define IWL_RATE_6M_MASK   (1 << IWL_RATE_6M_INDEX)
  93 #define IWL_RATE_9M_MASK   (1 << IWL_RATE_9M_INDEX)
  94 #define IWL_RATE_12M_MASK  (1 << IWL_RATE_12M_INDEX)
  95 #define IWL_RATE_18M_MASK  (1 << IWL_RATE_18M_INDEX)
  96 #define IWL_RATE_24M_MASK  (1 << IWL_RATE_24M_INDEX)
  97 #define IWL_RATE_36M_MASK  (1 << IWL_RATE_36M_INDEX)
  98 #define IWL_RATE_48M_MASK  (1 << IWL_RATE_48M_INDEX)
  99 #define IWL_RATE_54M_MASK  (1 << IWL_RATE_54M_INDEX)
 100 #define IWL_RATE_60M_MASK  (1 << IWL_RATE_60M_INDEX)
 101 #define IWL_RATE_1M_MASK   (1 << IWL_RATE_1M_INDEX)
 102 #define IWL_RATE_2M_MASK   (1 << IWL_RATE_2M_INDEX)
 103 #define IWL_RATE_5M_MASK   (1 << IWL_RATE_5M_INDEX)
 104 #define IWL_RATE_11M_MASK  (1 << IWL_RATE_11M_INDEX)
 105
 106 /* uCode API values for legacy bit rates, both OFDM and CCK */
 107 enum {
 108         IWL_RATE_6M_PLCP  = 13,
 109         IWL_RATE_9M_PLCP  = 15,
 110         IWL_RATE_12M_PLCP = 5,
 111         IWL_RATE_18M_PLCP = 7,
 112         IWL_RATE_24M_PLCP = 9,
 113         IWL_RATE_36M_PLCP = 11,
 114         IWL_RATE_48M_PLCP = 1,
 115         IWL_RATE_54M_PLCP = 3,
 116         IWL_RATE_60M_PLCP = 3,/*FIXME:RS:should be removed*/
 117         IWL_RATE_1M_PLCP  = 10,
 118         IWL_RATE_2M_PLCP  = 20,
 119         IWL_RATE_5M_PLCP  = 55,
 120         IWL_RATE_11M_PLCP = 110,
 121         /*FIXME:RS:change to IWL_RATE_LEGACY_??M_PLCP */
 122         /*FIXME:RS:add IWL_RATE_LEGACY_INVM_PLCP = 0,*/
 123 };
 124
 125 /* uCode API values for OFDM high-throughput (HT) bit rates */
 126 enum {
 127         IWL_RATE_SISO_6M_PLCP = 0,
 128         IWL_RATE_SISO_12M_PLCP = 1,
 129         IWL_RATE_SISO_18M_PLCP = 2,
 130         IWL_RATE_SISO_24M_PLCP = 3,
 131         IWL_RATE_SISO_36M_PLCP = 4,
 132         IWL_RATE_SISO_48M_PLCP = 5,
 133         IWL_RATE_SISO_54M_PLCP = 6,
 134         IWL_RATE_SISO_60M_PLCP = 7,
 135         IWL_RATE_MIMO2_6M_PLCP  = 0x8,
 136         IWL_RATE_MIMO2_12M_PLCP = 0x9,
 137         IWL_RATE_MIMO2_18M_PLCP = 0xa,
 138         IWL_RATE_MIMO2_24M_PLCP = 0xb,
 139         IWL_RATE_MIMO2_36M_PLCP = 0xc,
 140         IWL_RATE_MIMO2_48M_PLCP = 0xd,
 141         IWL_RATE_MIMO2_54M_PLCP = 0xe,
 142         IWL_RATE_MIMO2_60M_PLCP = 0xf,
 143         IWL_RATE_MIMO3_6M_PLCP  = 0x10,
 144         IWL_RATE_MIMO3_12M_PLCP = 0x11,
 145         IWL_RATE_MIMO3_18M_PLCP = 0x12,
 146         IWL_RATE_MIMO3_24M_PLCP = 0x13,
 147         IWL_RATE_MIMO3_36M_PLCP = 0x14,
 148         IWL_RATE_MIMO3_48M_PLCP = 0x15,
 149         IWL_RATE_MIMO3_54M_PLCP = 0x16,
 150         IWL_RATE_MIMO3_60M_PLCP = 0x17,
 151         IWL_RATE_SISO_INVM_PLCP,
 152         IWL_RATE_MIMO2_INVM_PLCP = IWL_RATE_SISO_INVM_PLCP,
 153         IWL_RATE_MIMO3_INVM_PLCP = IWL_RATE_SISO_INVM_PLCP,
 154 };
 155
 156 /* MAC header values for bit rates */
 157 enum {
 158         IWL_RATE_6M_IEEE  = 12,
 159         IWL_RATE_9M_IEEE  = 18,
 160         IWL_RATE_12M_IEEE = 24,
 161         IWL_RATE_18M_IEEE = 36,
 162         IWL_RATE_24M_IEEE = 48,
 163         IWL_RATE_36M_IEEE = 72,
 164         IWL_RATE_48M_IEEE = 96,
 165         IWL_RATE_54M_IEEE = 108,
 166         IWL_RATE_60M_IEEE = 120,
 167         IWL_RATE_1M_IEEE  = 2,
 168         IWL_RATE_2M_IEEE  = 4,
 169         IWL_RATE_5M_IEEE  = 11,
 170         IWL_RATE_11M_IEEE = 22,
 171 };
 172
 173 #define IWL_CCK_BASIC_RATES_MASK    \
 174        (IWL_RATE_1M_MASK          | \
 175         IWL_RATE_2M_MASK)
 176
 177 #define IWL_CCK_RATES_MASK          \
 178        (IWL_CCK_BASIC_RATES_MASK  | \
 179         IWL_RATE_5M_MASK          | \
 180         IWL_RATE_11M_MASK)
 181
 182 #define IWL_OFDM_BASIC_RATES_MASK   \
 183         (IWL_RATE_6M_MASK         | \
 184         IWL_RATE_12M_MASK         | \
 185         IWL_RATE_24M_MASK)
 186
 187 #define IWL_OFDM_RATES_MASK         \
 188        (IWL_OFDM_BASIC_RATES_MASK | \
 189         IWL_RATE_9M_MASK          | \
 190         IWL_RATE_18M_MASK         | \
 191         IWL_RATE_36M_MASK         | \
 192         IWL_RATE_48M_MASK         | \
 193         IWL_RATE_54M_MASK)
 194
 195 #define IWL_BASIC_RATES_MASK         \
 196         (IWL_OFDM_BASIC_RATES_MASK | \
 197          IWL_CCK_BASIC_RATES_MASK)
 198
 199 #define IWL_RATES_MASK ((1 << IWL_RATE_COUNT) - 1)
 200
 201 #define IWL_INVALID_VALUE    -1
 202
 203 #define IWL_MIN_RSSI_VAL                 -100
 204 #define IWL_MAX_RSSI_VAL                    0
 205
 206 /* These values specify how many Tx frame attempts before
 207  * searching for a new modulation mode */
 208 #define IWL_LEGACY_FAILURE_LIMIT        160
 209 #define IWL_LEGACY_SUCCESS_LIMIT        480
 210 #define IWL_LEGACY_TABLE_COUNT          160
 211
 212 #define IWL_NONE_LEGACY_FAILURE_LIMIT   400
 213 #define IWL_NONE_LEGACY_SUCCESS_LIMIT   4500
 214 #define IWL_NONE_LEGACY_TABLE_COUNT     1500
 215
 216 /* Success ratio (ACKed / attempted tx frames) values (perfect is 128 * 100) */
 217 #define IWL_RS_GOOD_RATIO               12800   /* 100% */
 218 #define IWL_RATE_SCALE_SWITCH           10880   /*  85% */
 219 #define IWL_RATE_HIGH_TH                10880   /*  85% */
 220 #define IWL_RATE_INCREASE_TH            6400    /*  50% */
 221 #define IWL_RATE_DECREASE_TH            1920    /*  15% */
 222
 223 /* possible actions when in legacy mode */
 224 #define IWL_LEGACY_SWITCH_ANTENNA1      0
 225 #define IWL_LEGACY_SWITCH_ANTENNA2      1
 226 #define IWL_LEGACY_SWITCH_SISO          2
 227 #define IWL_LEGACY_SWITCH_MIMO2_AB      3
 228 #define IWL_LEGACY_SWITCH_MIMO2_AC      4
 229 #define IWL_LEGACY_SWITCH_MIMO2_BC      5
 230 #define IWL_LEGACY_SWITCH_MIMO3_ABC     6
 231
 232 /* possible actions when in siso mode */
 233 #define IWL_SISO_SWITCH_ANTENNA1        0
 234 #define IWL_SISO_SWITCH_ANTENNA2        1
 235 #define IWL_SISO_SWITCH_MIMO2_AB        2
 236 #define IWL_SISO_SWITCH_MIMO2_AC        3
 237 #define IWL_SISO_SWITCH_MIMO2_BC        4
 238 #define IWL_SISO_SWITCH_GI              5
 239 #define IWL_SISO_SWITCH_MIMO3_ABC       6
 240
 241
 242 /* possible actions when in mimo mode */
 243 #define IWL_MIMO2_SWITCH_ANTENNA1       0
 244 #define IWL_MIMO2_SWITCH_ANTENNA2       1
 245 #define IWL_MIMO2_SWITCH_SISO_A         2
 246 #define IWL_MIMO2_SWITCH_SISO_B         3
 247 #define IWL_MIMO2_SWITCH_SISO_C         4
 248 #define IWL_MIMO2_SWITCH_GI             5
 249 #define IWL_MIMO2_SWITCH_MIMO3_ABC      6
 250
 251
 252 /* possible actions when in mimo3 mode */
 253 #define IWL_MIMO3_SWITCH_ANTENNA1       0
 254 #define IWL_MIMO3_SWITCH_ANTENNA2       1
 255 #define IWL_MIMO3_SWITCH_SISO_A         2
 256 #define IWL_MIMO3_SWITCH_SISO_B         3
 257 #define IWL_MIMO3_SWITCH_SISO_C         4
 258 #define IWL_MIMO3_SWITCH_MIMO2_AB       5
 259 #define IWL_MIMO3_SWITCH_MIMO2_AC       6
 260 #define IWL_MIMO3_SWITCH_MIMO2_BC       7
 261 #define IWL_MIMO3_SWITCH_GI             8
 262
 263
 264 #define IWL_MAX_11N_MIMO3_SEARCH IWL_MIMO3_SWITCH_GI
 265 #define IWL_MAX_SEARCH IWL_MIMO2_SWITCH_MIMO3_ABC
 266
 267 /*FIXME:RS:add possible actions for MIMO3*/
 268
 269 #define IWL_ACTION_LIMIT                3       /* # possible actions */
 270
 271 #define LQ_SIZE         2       /* 2 mode tables:  "Active" and "Search" */
 272
 273 /* load per tid defines for A-MPDU activation */
 274 #define IWL_AGG_TPT_THREHOLD    0
 275 #define IWL_AGG_LOAD_THRESHOLD  10
 276 #define IWL_AGG_ALL_TID         0xff
 277 #define TID_QUEUE_CELL_SPACING  50      /*mS */
 278 #define TID_QUEUE_MAX_SIZE      20
 279 #define TID_ROUND_VALUE         5       /* mS */
 280 #define TID_MAX_LOAD_COUNT      8
 281
 282 #define TID_MAX_TIME_DIFF ((TID_QUEUE_MAX_SIZE - 1) * TID_QUEUE_CELL_SPACING)
 283 #define TIME_WRAP_AROUND(x, y) (((y) > (x)) ? (y) - (x) : (0-(x)) + (y))
 284
 285 extern const struct iwl_rate_info iwl_rates[IWL_RATE_COUNT];
 286
 287 enum iwl_table_type {
 288         LQ_NONE,
 289         LQ_G,           /* legacy types */
 290         LQ_A,
 291         LQ_SISO,        /* high-throughput types */
 292         LQ_MIMO2,
 293         LQ_MIMO3,
 294         LQ_MAX,
 295 };
 296
 297 #define is_legacy(tbl) (((tbl) == LQ_G) || ((tbl) == LQ_A))
 298 #define is_siso(tbl) ((tbl) == LQ_SISO)
 299 #define is_mimo2(tbl) ((tbl) == LQ_MIMO2)
 300 #define is_mimo3(tbl) ((tbl) == LQ_MIMO3)
 301 #define is_mimo(tbl) (is_mimo2(tbl) || is_mimo3(tbl))
 302 #define is_Ht(tbl) (is_siso(tbl) || is_mimo(tbl))
 303 #define is_a_band(tbl) ((tbl) == LQ_A)
 304 #define is_g_and(tbl) ((tbl) == LQ_G)
 305
 306 #define ANT_NONE        0x0
 307 #define ANT_A           BIT(0)
 308 #define ANT_B           BIT(1)
 309 #define ANT_AB          (ANT_A | ANT_B)
 310 #define ANT_C           BIT(2)
 311 #define ANT_AC          (ANT_A | ANT_C)
 312 #define ANT_BC          (ANT_B | ANT_C)
 313 #define ANT_ABC         (ANT_AB | ANT_C)
 314
 315 #define IWL_MAX_MCS_DISPLAY_SIZE        12
 316
 317 struct iwl_rate_mcs_info {
 318         char    mbps[IWL_MAX_MCS_DISPLAY_SIZE];
 319         char    mcs[IWL_MAX_MCS_DISPLAY_SIZE];
 320 };
 321
 322 /**
 323  * struct iwl_rate_scale_data -- tx success history for one rate
 324  */
 325 struct iwl_rate_scale_data {
 326         u64 data;               /* bitmap of successful frames */
 327         s32 success_counter;    /* number of frames successful */
 328         s32 success_ratio;      /* per-cent * 128  */
 329         s32 counter;            /* number of frames attempted */
 330         s32 average_tpt;        /* success ratio * expected throughput */
 331         unsigned long stamp;
 332 };
 333
 334 /**
 335  * struct iwl_scale_tbl_info -- tx params and success history for all rates
 336  *
 337  * There are two of these in struct iwl_lq_sta,
 338  * one for "active", and one for "search".
 339  */
 340 struct iwl_scale_tbl_info {
 341         enum iwl_table_type lq_type;
 342         u8 ant_type;
 343         u8 is_SGI;      /* 1 = short guard interval */
 344         u8 is_ht40;     /* 1 = 40 MHz channel width */
 345         u8 is_dup;      /* 1 = duplicated data streams */
 346         u8 action;      /* change modulation; IWL_[LEGACY/SISO/MIMO]_SWITCH_* */
 347         u8 max_search;  /* maximun number of tables we can search */
 348         s32 *expected_tpt;      /* throughput metrics; expected_tpt_G, etc. */
 349         u32 current_rate;  /* rate_n_flags, uCode API format */
 350         struct iwl_rate_scale_data win[IWL_RATE_COUNT]; /* rate histories */
 351 };
 352
 353 struct iwl_traffic_load {
 354         unsigned long time_stamp;       /* age of the oldest statistics */
 355         u32 packet_count[TID_QUEUE_MAX_SIZE];   /* packet count in this time
 356                                                  * slice */
 357         u32 total;                      /* total num of packets during the
 358                                          * last TID_MAX_TIME_DIFF */
 359         u8 queue_count;                 /* number of queues that has
 360                                          * been used since the last cleanup */
 361         u8 head;                        /* start of the circular buffer */
 362 };
 363
 364 /**
 365  * struct iwl_lq_sta -- driver's rate scaling private structure
 366  *
 367  * Pointer to this gets passed back and forth between driver and mac80211.
 368  */
 369 struct iwl_lq_sta {
 370         u8 active_tbl;          /* index of active table, range 0-1 */
 371         u8 enable_counter;      /* indicates HT mode */
 372         u8 stay_in_tbl;         /* 1: disallow, 0: allow search for new mode */
 373         u8 search_better_tbl;   /* 1: currently trying alternate mode */
 374         s32 last_tpt;
 375
 376         /* The following determine when to search for a new mode */
 377         u32 table_count_limit;
 378         u32 max_failure_limit;  /* # failed frames before new search */
 379         u32 max_success_limit;  /* # successful frames before new search */
 380         u32 table_count;
 381         u32 total_failed;       /* total failed frames, any/all rates */
 382         u32 total_success;      /* total successful frames, any/all rates */
 383         u64 flush_timer;        /* time staying in mode before new search */
 384
 385         u8 action_counter;      /* # mode-switch actions tried */
 386         u8 is_green;
 387         u8 is_dup;
 388         enum ieee80211_band band;
 389
 390         /* The following are bitmaps of rates; IWL_RATE_6M_MASK, etc. */
 391         u32 supp_rates;
 392         u16 active_legacy_rate;
 393         u16 active_siso_rate;
 394         u16 active_mimo2_rate;
 395         u16 active_mimo3_rate;
 396         s8 max_rate_idx;     /* Max rate set by user */
 397         u8 missed_rate_counter;
 398
 399         struct iwl_link_quality_cmd lq;
 400         struct iwl_scale_tbl_info lq_info[LQ_SIZE]; /* "active", "search" */
 401         struct iwl_traffic_load load[TID_MAX_LOAD_COUNT];
 402         u8 tx_agg_tid_en;
 403 #ifdef CONFIG_MAC80211_DEBUGFS
 404         struct dentry *rs_sta_dbgfs_scale_table_file;
 405         struct dentry *rs_sta_dbgfs_stats_table_file;
 406         struct dentry *rs_sta_dbgfs_rate_scale_data_file;
 407         struct dentry *rs_sta_dbgfs_tx_agg_tid_en_file;
 408         u32 dbg_fixed_rate;
 409 #endif
 410         struct iwl_priv *drv;
 411
 412         /* used to be in sta_info */
 413         int last_txrate_idx;
 414         /* last tx rate_n_flags */
 415         u32 last_rate_n_flags;
 416         /* packets destined for this STA are aggregated */
 417         u8 is_agg;
 418         /* BT traffic this sta was last updated in */
 419         u8 last_bt_traffic;
 420 };
 421
 422 static inline u8 num_of_ant(u8 mask)
 423 {
 424         return  !!((mask) & ANT_A) +
 425                 !!((mask) & ANT_B) +
 426                 !!((mask) & ANT_C);
 427 }
 428
 429 static inline u8 first_antenna(u8 mask)
 430 {
 431         if (mask & ANT_A)
 432                 return ANT_A;
 433         if (mask & ANT_B)
 434                 return ANT_B;
 435         return ANT_C;
 436 }
 437
 438
 439 /* Initialize station's rate scaling information after adding station */
 440 extern void iwl_rs_rate_init(struct iwl_priv *priv,
 441                              struct ieee80211_sta *sta, u8 sta_id);
 442
 443 /**
 444  * iwl_rate_control_register - Register the rate control algorithm callbacks
 445  *
 446  * Since the rate control algorithm is hardware specific, there is no need
 447  * or reason to place it as a stand alone module.  The driver can call
 448  * iwl_rate_control_register in order to register the rate control callbacks
 449  * with the mac80211 subsystem.  This should be performed prior to calling
 450  * ieee80211_register_hw
 451  *
 452  */
 453 extern int iwlagn_rate_control_register(void);
 454
 455 /**
 456  * iwl_rate_control_unregister - Unregister the rate control callbacks
 457  *
 458  * This should be called after calling ieee80211_unregister_hw, but before
 459  * the driver is unloaded.
 460  */
 461 extern void iwlagn_rate_control_unregister(void);
 462
 463 #endif /* __iwl_agn__rs__ */