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

   1 /******************************************************************************
   2  *
   3  * Copyright(c) 2003 - 2013 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 __rs_h__
  28 #define __rs_h__
  29
  30 #include <net/mac80211.h>
  31
  32 #include "iwl-config.h"
  33
  34 #include "fw-api.h"
  35 #include "iwl-trans.h"
  36
  37 struct iwl_rs_rate_info {
  38         u8 plcp;        /* uCode API:  IWL_RATE_6M_PLCP, etc. */
  39         u8 plcp_siso;   /* uCode API:  IWL_RATE_SISO_6M_PLCP, etc. */
  40         u8 plcp_mimo2;  /* uCode API:  IWL_RATE_MIMO2_6M_PLCP, etc. */
  41         u8 prev_rs;      /* previous rate used in rs algo */
  42         u8 next_rs;      /* next rate used in rs algo */
  43 };
  44
  45 #define IWL_RATE_60M_PLCP 3
  46
  47 enum {
  48         IWL_RATE_INVM_INDEX = IWL_RATE_COUNT,
  49         IWL_RATE_INVALID = IWL_RATE_COUNT,
  50 };
  51
  52 #define LINK_QUAL_MAX_RETRY_NUM 16
  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 /* #define vs. enum to keep from defaulting to 'large integer' */
  71 #define IWL_RATE_6M_MASK   (1 << IWL_RATE_6M_INDEX)
  72 #define IWL_RATE_9M_MASK   (1 << IWL_RATE_9M_INDEX)
  73 #define IWL_RATE_12M_MASK  (1 << IWL_RATE_12M_INDEX)
  74 #define IWL_RATE_18M_MASK  (1 << IWL_RATE_18M_INDEX)
  75 #define IWL_RATE_24M_MASK  (1 << IWL_RATE_24M_INDEX)
  76 #define IWL_RATE_36M_MASK  (1 << IWL_RATE_36M_INDEX)
  77 #define IWL_RATE_48M_MASK  (1 << IWL_RATE_48M_INDEX)
  78 #define IWL_RATE_54M_MASK  (1 << IWL_RATE_54M_INDEX)
  79 #define IWL_RATE_60M_MASK  (1 << IWL_RATE_60M_INDEX)
  80 #define IWL_RATE_1M_MASK   (1 << IWL_RATE_1M_INDEX)
  81 #define IWL_RATE_2M_MASK   (1 << IWL_RATE_2M_INDEX)
  82 #define IWL_RATE_5M_MASK   (1 << IWL_RATE_5M_INDEX)
  83 #define IWL_RATE_11M_MASK  (1 << IWL_RATE_11M_INDEX)
  84
  85
  86 /* uCode API values for OFDM high-throughput (HT) bit rates */
  87 enum {
  88         IWL_RATE_SISO_6M_PLCP = 0,
  89         IWL_RATE_SISO_12M_PLCP = 1,
  90         IWL_RATE_SISO_18M_PLCP = 2,
  91         IWL_RATE_SISO_24M_PLCP = 3,
  92         IWL_RATE_SISO_36M_PLCP = 4,
  93         IWL_RATE_SISO_48M_PLCP = 5,
  94         IWL_RATE_SISO_54M_PLCP = 6,
  95         IWL_RATE_SISO_60M_PLCP = 7,
  96         IWL_RATE_MIMO2_6M_PLCP  = 0x8,
  97         IWL_RATE_MIMO2_12M_PLCP = 0x9,
  98         IWL_RATE_MIMO2_18M_PLCP = 0xa,
  99         IWL_RATE_MIMO2_24M_PLCP = 0xb,
 100         IWL_RATE_MIMO2_36M_PLCP = 0xc,
 101         IWL_RATE_MIMO2_48M_PLCP = 0xd,
 102         IWL_RATE_MIMO2_54M_PLCP = 0xe,
 103         IWL_RATE_MIMO2_60M_PLCP = 0xf,
 104         IWL_RATE_MIMO3_6M_PLCP  = 0x10,
 105         IWL_RATE_MIMO3_12M_PLCP = 0x11,
 106         IWL_RATE_MIMO3_18M_PLCP = 0x12,
 107         IWL_RATE_MIMO3_24M_PLCP = 0x13,
 108         IWL_RATE_MIMO3_36M_PLCP = 0x14,
 109         IWL_RATE_MIMO3_48M_PLCP = 0x15,
 110         IWL_RATE_MIMO3_54M_PLCP = 0x16,
 111         IWL_RATE_MIMO3_60M_PLCP = 0x17,
 112         IWL_RATE_SISO_INVM_PLCP,
 113         IWL_RATE_MIMO2_INVM_PLCP = IWL_RATE_SISO_INVM_PLCP,
 114         IWL_RATE_MIMO3_INVM_PLCP = IWL_RATE_SISO_INVM_PLCP,
 115 };
 116
 117 #define IWL_RATES_MASK ((1 << IWL_RATE_COUNT) - 1)
 118
 119 #define IWL_INVALID_VALUE    -1
 120
 121 #define IWL_MIN_RSSI_VAL                 -100
 122 #define IWL_MAX_RSSI_VAL                    0
 123
 124 /* These values specify how many Tx frame attempts before
 125  * searching for a new modulation mode */
 126 #define IWL_LEGACY_FAILURE_LIMIT        160
 127 #define IWL_LEGACY_SUCCESS_LIMIT        480
 128 #define IWL_LEGACY_TABLE_COUNT          160
 129
 130 #define IWL_NONE_LEGACY_FAILURE_LIMIT   400
 131 #define IWL_NONE_LEGACY_SUCCESS_LIMIT   4500
 132 #define IWL_NONE_LEGACY_TABLE_COUNT     1500
 133
 134 /* Success ratio (ACKed / attempted tx frames) values (perfect is 128 * 100) */
 135 #define IWL_RS_GOOD_RATIO               12800   /* 100% */
 136 #define IWL_RATE_SCALE_SWITCH           10880   /*  85% */
 137 #define IWL_RATE_HIGH_TH                10880   /*  85% */
 138 #define IWL_RATE_INCREASE_TH            6400    /*  50% */
 139 #define IWL_RATE_DECREASE_TH            1920    /*  15% */
 140
 141 /* possible actions when in legacy mode */
 142 #define IWL_LEGACY_SWITCH_ANTENNA1      0
 143 #define IWL_LEGACY_SWITCH_ANTENNA2      1
 144 #define IWL_LEGACY_SWITCH_SISO          2
 145 #define IWL_LEGACY_SWITCH_MIMO2         3
 146
 147 /* possible actions when in siso mode */
 148 #define IWL_SISO_SWITCH_ANTENNA1        0
 149 #define IWL_SISO_SWITCH_ANTENNA2        1
 150 #define IWL_SISO_SWITCH_MIMO2           2
 151 #define IWL_SISO_SWITCH_GI              3
 152
 153 /* possible actions when in mimo mode */
 154 #define IWL_MIMO2_SWITCH_ANTENNA1       0
 155 #define IWL_MIMO2_SWITCH_ANTENNA2       1
 156 #define IWL_MIMO2_SWITCH_SISO_A         2
 157 #define IWL_MIMO2_SWITCH_SISO_B         3
 158 #define IWL_MIMO2_SWITCH_GI             4
 159
 160 #define IWL_MAX_SEARCH IWL_MIMO2_SWITCH_GI
 161
 162 #define IWL_ACTION_LIMIT                3       /* # possible actions */
 163
 164 #define LINK_QUAL_AGG_TIME_LIMIT_DEF    (4000) /* 4 milliseconds */
 165 #define LINK_QUAL_AGG_TIME_LIMIT_MAX    (8000)
 166 #define LINK_QUAL_AGG_TIME_LIMIT_MIN    (100)
 167
 168 #define LINK_QUAL_AGG_DISABLE_START_DEF (3)
 169 #define LINK_QUAL_AGG_DISABLE_START_MAX (255)
 170 #define LINK_QUAL_AGG_DISABLE_START_MIN (0)
 171
 172 #define LINK_QUAL_AGG_FRAME_LIMIT_DEF   (63)
 173 #define LINK_QUAL_AGG_FRAME_LIMIT_MAX   (63)
 174 #define LINK_QUAL_AGG_FRAME_LIMIT_MIN   (0)
 175
 176 #define LQ_SIZE         2       /* 2 mode tables:  "Active" and "Search" */
 177
 178 /* load per tid defines for A-MPDU activation */
 179 #define IWL_AGG_TPT_THREHOLD    0
 180 #define IWL_AGG_LOAD_THRESHOLD  10
 181 #define IWL_AGG_ALL_TID         0xff
 182 #define TID_QUEUE_CELL_SPACING  50      /*mS */
 183 #define TID_QUEUE_MAX_SIZE      20
 184 #define TID_ROUND_VALUE         5       /* mS */
 185
 186 #define TID_MAX_TIME_DIFF ((TID_QUEUE_MAX_SIZE - 1) * TID_QUEUE_CELL_SPACING)
 187 #define TIME_WRAP_AROUND(x, y) (((y) > (x)) ? (y) - (x) : (0-(x)) + (y))
 188
 189 enum iwl_table_type {
 190         LQ_NONE,
 191         LQ_G,           /* legacy types */
 192         LQ_A,
 193         LQ_SISO,        /* high-throughput types */
 194         LQ_MIMO2,
 195         LQ_MAX,
 196 };
 197
 198 #define is_legacy(tbl) (((tbl) == LQ_G) || ((tbl) == LQ_A))
 199 #define is_siso(tbl) ((tbl) == LQ_SISO)
 200 #define is_mimo2(tbl) ((tbl) == LQ_MIMO2)
 201 #define is_mimo(tbl) is_mimo2(tbl)
 202 #define is_Ht(tbl) (is_siso(tbl) || is_mimo(tbl))
 203 #define is_a_band(tbl) ((tbl) == LQ_A)
 204 #define is_g_and(tbl) ((tbl) == LQ_G)
 205
 206 #define IWL_MAX_MCS_DISPLAY_SIZE        12
 207
 208 struct iwl_rate_mcs_info {
 209         char    mbps[IWL_MAX_MCS_DISPLAY_SIZE];
 210         char    mcs[IWL_MAX_MCS_DISPLAY_SIZE];
 211 };
 212
 213 /**
 214  * struct iwl_rate_scale_data -- tx success history for one rate
 215  */
 216 struct iwl_rate_scale_data {
 217         u64 data;               /* bitmap of successful frames */
 218         s32 success_counter;    /* number of frames successful */
 219         s32 success_ratio;      /* per-cent * 128  */
 220         s32 counter;            /* number of frames attempted */
 221         s32 average_tpt;        /* success ratio * expected throughput */
 222         unsigned long stamp;
 223 };
 224
 225 /**
 226  * struct iwl_scale_tbl_info -- tx params and success history for all rates
 227  *
 228  * There are two of these in struct iwl_lq_sta,
 229  * one for "active", and one for "search".
 230  */
 231 struct iwl_scale_tbl_info {
 232         enum iwl_table_type lq_type;
 233         u8 ant_type;
 234         u8 is_SGI;      /* 1 = short guard interval */
 235         u8 is_ht40;     /* 1 = 40 MHz channel width */
 236         u8 action;      /* change modulation; IWL_[LEGACY/SISO/MIMO]_SWITCH_* */
 237         u8 max_search;  /* maximun number of tables we can search */
 238         s32 *expected_tpt;      /* throughput metrics; expected_tpt_G, etc. */
 239         u32 current_rate;  /* rate_n_flags, uCode API format */
 240         struct iwl_rate_scale_data win[IWL_RATE_COUNT]; /* rate histories */
 241 };
 242
 243 /**
 244  * struct iwl_lq_sta -- driver's rate scaling private structure
 245  *
 246  * Pointer to this gets passed back and forth between driver and mac80211.
 247  */
 248 struct iwl_lq_sta {
 249         u8 active_tbl;          /* index of active table, range 0-1 */
 250         u8 enable_counter;      /* indicates HT mode */
 251         u8 stay_in_tbl;         /* 1: disallow, 0: allow search for new mode */
 252         u8 search_better_tbl;   /* 1: currently trying alternate mode */
 253         s32 last_tpt;
 254
 255         /* The following determine when to search for a new mode */
 256         u32 table_count_limit;
 257         u32 max_failure_limit;  /* # failed frames before new search */
 258         u32 max_success_limit;  /* # successful frames before new search */
 259         u32 table_count;
 260         u32 total_failed;       /* total failed frames, any/all rates */
 261         u32 total_success;      /* total successful frames, any/all rates */
 262         u64 flush_timer;        /* time staying in mode before new search */
 263
 264         u8 action_counter;      /* # mode-switch actions tried */
 265         u8 is_green;
 266         enum ieee80211_band band;
 267
 268         /* The following are bitmaps of rates; IWL_RATE_6M_MASK, etc. */
 269         u32 supp_rates;
 270         u16 active_legacy_rate;
 271         u16 active_siso_rate;
 272         u16 active_mimo2_rate;
 273         s8 max_rate_idx;     /* Max rate set by user */
 274         u8 missed_rate_counter;
 275
 276         struct iwl_lq_cmd lq;
 277         struct iwl_scale_tbl_info lq_info[LQ_SIZE]; /* "active", "search" */
 278         u8 tx_agg_tid_en;
 279 #ifdef CONFIG_MAC80211_DEBUGFS
 280         struct dentry *rs_sta_dbgfs_scale_table_file;
 281         struct dentry *rs_sta_dbgfs_stats_table_file;
 282         struct dentry *rs_sta_dbgfs_tx_agg_tid_en_file;
 283         u32 dbg_fixed_rate;
 284 #endif
 285         struct iwl_mvm *drv;
 286
 287         /* used to be in sta_info */
 288         int last_txrate_idx;
 289         /* last tx rate_n_flags */
 290         u32 last_rate_n_flags;
 291         /* packets destined for this STA are aggregated */
 292         u8 is_agg;
 293         /* BT traffic this sta was last updated in */
 294         u8 last_bt_traffic;
 295 };
 296
 297 enum iwl_bt_coex_profile_traffic_load {
 298         IWL_BT_COEX_TRAFFIC_LOAD_NONE           = 0,
 299         IWL_BT_COEX_TRAFFIC_LOAD_LOW            = 1,
 300         IWL_BT_COEX_TRAFFIC_LOAD_HIGH           = 2,
 301         IWL_BT_COEX_TRAFFIC_LOAD_CONTINUOUS     = 3,
 302 /*
 303  * There are no more even though below is a u8, the
 304  * indication from the BT device only has two bits.
 305  */
 306 };
 307
 308
 309 static inline u8 num_of_ant(u8 mask)
 310 {
 311         return  !!((mask) & ANT_A) +
 312                 !!((mask) & ANT_B) +
 313                 !!((mask) & ANT_C);
 314 }
 315
 316 /* Initialize station's rate scaling information after adding station */
 317 void iwl_mvm_rs_rate_init(struct iwl_mvm *mvm, struct ieee80211_sta *sta,
 318                           enum ieee80211_band band);
 319
 320 /**
 321  * iwl_rate_control_register - Register the rate control algorithm callbacks
 322  *
 323  * Since the rate control algorithm is hardware specific, there is no need
 324  * or reason to place it as a stand alone module.  The driver can call
 325  * iwl_rate_control_register in order to register the rate control callbacks
 326  * with the mac80211 subsystem.  This should be performed prior to calling
 327  * ieee80211_register_hw
 328  *
 329  */
 330 int iwl_mvm_rate_control_register(void);
 331
 332 /**
 333  * iwl_rate_control_unregister - Unregister the rate control callbacks
 334  *
 335  * This should be called after calling ieee80211_unregister_hw, but before
 336  * the driver is unloaded.
 337  */
 338 void iwl_mvm_rate_control_unregister(void);
 339
 340 struct iwl_mvm_sta;
 341
 342 int iwl_mvm_tx_protection(struct iwl_mvm *mvm, struct iwl_mvm_sta *mvmsta,
 343                           bool enable);
 344
 345 #endif /* __rs__ */