drivers/net/wireless/iwlwifi/iwl-3945-rs.h

   1 /******************************************************************************
   2  *
   3  * Copyright(c) 2005 - 2007 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  * James P. Ketrenos <ipw2100-admin@linux.intel.com>
  23  * Intel Corporation, 5200 N.E. Elam Young Parkway, Hillsboro, OR 97124-6497
  24  *
  25  *****************************************************************************/
  26
  27 #ifndef __iwl_3945_rs_h__
  28 #define __iwl_3945_rs_h__
  29
  30 struct iwl3945_rate_info {
  31         u8 plcp;
  32         u8 ieee;
  33         u8 prev_ieee;           /* previous rate in IEEE speeds */
  34         u8 next_ieee;           /* next rate in IEEE speeds */
  35         u8 prev_rs;             /* previous rate used in rs algo */
  36         u8 next_rs;             /* next rate used in rs algo */
  37         u8 prev_rs_tgg;         /* previous rate used in TGG rs algo */
  38         u8 next_rs_tgg;         /* next rate used in TGG rs algo */
  39         u8 table_rs_index;      /* index in rate scale table cmd */
  40         u8 prev_table_rs;       /* prev in rate table cmd */
  41
  42 };
  43
  44 enum {
  45         IWL_RATE_1M_INDEX = 0,
  46         IWL_RATE_2M_INDEX,
  47         IWL_RATE_5M_INDEX,
  48         IWL_RATE_11M_INDEX,
  49         IWL_RATE_6M_INDEX,
  50         IWL_RATE_9M_INDEX,
  51         IWL_RATE_12M_INDEX,
  52         IWL_RATE_18M_INDEX,
  53         IWL_RATE_24M_INDEX,
  54         IWL_RATE_36M_INDEX,
  55         IWL_RATE_48M_INDEX,
  56         IWL_RATE_54M_INDEX,
  57         IWL_RATE_COUNT,
  58         IWL_RATE_INVM_INDEX,
  59         IWL_RATE_INVALID = IWL_RATE_INVM_INDEX
  60 };
  61
  62 enum {
  63         IWL_RATE_6M_INDEX_TABLE = 0,
  64         IWL_RATE_9M_INDEX_TABLE,
  65         IWL_RATE_12M_INDEX_TABLE,
  66         IWL_RATE_18M_INDEX_TABLE,
  67         IWL_RATE_24M_INDEX_TABLE,
  68         IWL_RATE_36M_INDEX_TABLE,
  69         IWL_RATE_48M_INDEX_TABLE,
  70         IWL_RATE_54M_INDEX_TABLE,
  71         IWL_RATE_1M_INDEX_TABLE,
  72         IWL_RATE_2M_INDEX_TABLE,
  73         IWL_RATE_5M_INDEX_TABLE,
  74         IWL_RATE_11M_INDEX_TABLE,
  75         IWL_RATE_INVM_INDEX_TABLE = IWL_RATE_INVM_INDEX,
  76 };
  77
  78 enum {
  79         IWL_FIRST_OFDM_RATE = IWL_RATE_6M_INDEX,
  80         IWL_LAST_OFDM_RATE = IWL_RATE_54M_INDEX,
  81         IWL_FIRST_CCK_RATE = IWL_RATE_1M_INDEX,
  82         IWL_LAST_CCK_RATE = IWL_RATE_11M_INDEX,
  83 };
  84
  85 /* #define vs. enum to keep from defaulting to 'large integer' */
  86 #define IWL_RATE_6M_MASK   (1<<IWL_RATE_6M_INDEX)
  87 #define IWL_RATE_9M_MASK   (1<<IWL_RATE_9M_INDEX)
  88 #define IWL_RATE_12M_MASK  (1<<IWL_RATE_12M_INDEX)
  89 #define IWL_RATE_18M_MASK  (1<<IWL_RATE_18M_INDEX)
  90 #define IWL_RATE_24M_MASK  (1<<IWL_RATE_24M_INDEX)
  91 #define IWL_RATE_36M_MASK  (1<<IWL_RATE_36M_INDEX)
  92 #define IWL_RATE_48M_MASK  (1<<IWL_RATE_48M_INDEX)
  93 #define IWL_RATE_54M_MASK  (1<<IWL_RATE_54M_INDEX)
  94 #define IWL_RATE_1M_MASK   (1<<IWL_RATE_1M_INDEX)
  95 #define IWL_RATE_2M_MASK   (1<<IWL_RATE_2M_INDEX)
  96 #define IWL_RATE_5M_MASK   (1<<IWL_RATE_5M_INDEX)
  97 #define IWL_RATE_11M_MASK  (1<<IWL_RATE_11M_INDEX)
  98
  99 enum {
 100         IWL_RATE_6M_PLCP = 13,
 101         IWL_RATE_9M_PLCP = 15,
 102         IWL_RATE_12M_PLCP = 5,
 103         IWL_RATE_18M_PLCP = 7,
 104         IWL_RATE_24M_PLCP = 9,
 105         IWL_RATE_36M_PLCP = 11,
 106         IWL_RATE_48M_PLCP = 1,
 107         IWL_RATE_54M_PLCP = 3,
 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 };
 113
 114 enum {
 115         IWL_RATE_6M_IEEE = 12,
 116         IWL_RATE_9M_IEEE = 18,
 117         IWL_RATE_12M_IEEE = 24,
 118         IWL_RATE_18M_IEEE = 36,
 119         IWL_RATE_24M_IEEE = 48,
 120         IWL_RATE_36M_IEEE = 72,
 121         IWL_RATE_48M_IEEE = 96,
 122         IWL_RATE_54M_IEEE = 108,
 123         IWL_RATE_1M_IEEE = 2,
 124         IWL_RATE_2M_IEEE = 4,
 125         IWL_RATE_5M_IEEE = 11,
 126         IWL_RATE_11M_IEEE = 22,
 127 };
 128
 129 #define IWL_CCK_BASIC_RATES_MASK    \
 130        (IWL_RATE_1M_MASK          | \
 131         IWL_RATE_2M_MASK)
 132
 133 #define IWL_CCK_RATES_MASK          \
 134        (IWL_BASIC_RATES_MASK      | \
 135         IWL_RATE_5M_MASK          | \
 136         IWL_RATE_11M_MASK)
 137
 138 #define IWL_OFDM_BASIC_RATES_MASK   \
 139         (IWL_RATE_6M_MASK         | \
 140         IWL_RATE_12M_MASK         | \
 141         IWL_RATE_24M_MASK)
 142
 143 #define IWL_OFDM_RATES_MASK         \
 144        (IWL_OFDM_BASIC_RATES_MASK | \
 145         IWL_RATE_9M_MASK          | \
 146         IWL_RATE_18M_MASK         | \
 147         IWL_RATE_36M_MASK         | \
 148         IWL_RATE_48M_MASK         | \
 149         IWL_RATE_54M_MASK)
 150
 151 #define IWL_BASIC_RATES_MASK         \
 152         (IWL_OFDM_BASIC_RATES_MASK | \
 153          IWL_CCK_BASIC_RATES_MASK)
 154
 155 #define IWL_RATES_MASK ((1<<IWL_RATE_COUNT)-1)
 156
 157 #define IWL_INVALID_VALUE    -1
 158
 159 #define IWL_MIN_RSSI_VAL                 -100
 160 #define IWL_MAX_RSSI_VAL                    0
 161
 162 extern const struct iwl3945_rate_info iwl3945_rates[IWL_RATE_COUNT];
 163
 164 static inline u8 iwl3945_get_prev_ieee_rate(u8 rate_index)
 165 {
 166         u8 rate = iwl3945_rates[rate_index].prev_ieee;
 167
 168         if (rate == IWL_RATE_INVALID)
 169                 rate = rate_index;
 170         return rate;
 171 }
 172
 173 /**
 174  * iwl3945_fill_rs_info - Fill an output text buffer with the rate representation
 175  *
 176  * NOTE:  This is provided as a quick mechanism for a user to visualize
 177  * the performance of the rate control algorithm and is not meant to be
 178  * parsed software.
 179  */
 180 extern int iwl3945_fill_rs_info(struct ieee80211_hw *, char *buf, u8 sta_id);
 181
 182 /**
 183  * iwl3945_rate_scale_init - Initialize the rate scale table based on assoc info
 184  *
 185  * The specific throughput table used is based on the type of network
 186  * the associated with, including A, B, G, and G w/ TGG protection
 187  */
 188 extern void iwl3945_rate_scale_init(struct ieee80211_hw *hw, s32 sta_id);
 189
 190 /**
 191  * iwl3945_rate_control_register - Register the rate control algorithm callbacks
 192  *
 193  * Since the rate control algorithm is hardware specific, there is no need
 194  * or reason to place it as a stand alone module.  The driver can call
 195  * iwl3945_rate_control_register in order to register the rate control callbacks
 196  * with the mac80211 subsystem.  This should be performed prior to calling
 197  * ieee80211_register_hw
 198  *
 199  */
 200 extern void iwl3945_rate_control_register(struct ieee80211_hw *hw);
 201
 202 /**
 203  * iwl3945_rate_control_unregister - Unregister the rate control callbacks
 204  *
 205  * This should be called after calling ieee80211_unregister_hw, but before
 206  * the driver is unloaded.
 207  */
 208 extern void iwl3945_rate_control_unregister(struct ieee80211_hw *hw);
 209
 210 #endif