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 iwl_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 };
  40
  41 enum {
  42         IWL_RATE_6M_INDEX = 0,
  43         IWL_RATE_9M_INDEX,
  44         IWL_RATE_12M_INDEX,
  45         IWL_RATE_18M_INDEX,
  46         IWL_RATE_24M_INDEX,
  47         IWL_RATE_36M_INDEX,
  48         IWL_RATE_48M_INDEX,
  49         IWL_RATE_54M_INDEX,
  50         IWL_RATE_1M_INDEX,
  51         IWL_RATE_2M_INDEX,
  52         IWL_RATE_5M_INDEX,
  53         IWL_RATE_11M_INDEX,
  54         IWL_RATE_COUNT,
  55         IWL_RATE_INVM_INDEX,
  56         IWL_RATE_INVALID = IWL_RATE_INVM_INDEX
  57 };
  58
  59 enum {
  60         IWL_FIRST_OFDM_RATE = IWL_RATE_6M_INDEX,
  61         IWL_LAST_OFDM_RATE = IWL_RATE_54M_INDEX,
  62         IWL_FIRST_CCK_RATE = IWL_RATE_1M_INDEX,
  63         IWL_LAST_CCK_RATE = IWL_RATE_11M_INDEX,
  64 };
  65
  66 /* #define vs. enum to keep from defaulting to 'large integer' */
  67 #define IWL_RATE_6M_MASK   (1<<IWL_RATE_6M_INDEX)
  68 #define IWL_RATE_9M_MASK   (1<<IWL_RATE_9M_INDEX)
  69 #define IWL_RATE_12M_MASK  (1<<IWL_RATE_12M_INDEX)
  70 #define IWL_RATE_18M_MASK  (1<<IWL_RATE_18M_INDEX)
  71 #define IWL_RATE_24M_MASK  (1<<IWL_RATE_24M_INDEX)
  72 #define IWL_RATE_36M_MASK  (1<<IWL_RATE_36M_INDEX)
  73 #define IWL_RATE_48M_MASK  (1<<IWL_RATE_48M_INDEX)
  74 #define IWL_RATE_54M_MASK  (1<<IWL_RATE_54M_INDEX)
  75 #define IWL_RATE_1M_MASK   (1<<IWL_RATE_1M_INDEX)
  76 #define IWL_RATE_2M_MASK   (1<<IWL_RATE_2M_INDEX)
  77 #define IWL_RATE_5M_MASK   (1<<IWL_RATE_5M_INDEX)
  78 #define IWL_RATE_11M_MASK  (1<<IWL_RATE_11M_INDEX)
  79
  80 enum {
  81         IWL_RATE_6M_PLCP = 13,
  82         IWL_RATE_9M_PLCP = 15,
  83         IWL_RATE_12M_PLCP = 5,
  84         IWL_RATE_18M_PLCP = 7,
  85         IWL_RATE_24M_PLCP = 9,
  86         IWL_RATE_36M_PLCP = 11,
  87         IWL_RATE_48M_PLCP = 1,
  88         IWL_RATE_54M_PLCP = 3,
  89         IWL_RATE_1M_PLCP = 10,
  90         IWL_RATE_2M_PLCP = 20,
  91         IWL_RATE_5M_PLCP = 55,
  92         IWL_RATE_11M_PLCP = 110,
  93 };
  94
  95 enum {
  96         IWL_RATE_6M_IEEE = 12,
  97         IWL_RATE_9M_IEEE = 18,
  98         IWL_RATE_12M_IEEE = 24,
  99         IWL_RATE_18M_IEEE = 36,
 100         IWL_RATE_24M_IEEE = 48,
 101         IWL_RATE_36M_IEEE = 72,
 102         IWL_RATE_48M_IEEE = 96,
 103         IWL_RATE_54M_IEEE = 108,
 104         IWL_RATE_1M_IEEE = 2,
 105         IWL_RATE_2M_IEEE = 4,
 106         IWL_RATE_5M_IEEE = 11,
 107         IWL_RATE_11M_IEEE = 22,
 108 };
 109
 110 #define IWL_CCK_BASIC_RATES_MASK    \
 111        (IWL_RATE_1M_MASK          | \
 112         IWL_RATE_2M_MASK)
 113
 114 #define IWL_CCK_RATES_MASK          \
 115        (IWL_BASIC_RATES_MASK      | \
 116         IWL_RATE_5M_MASK          | \
 117         IWL_RATE_11M_MASK)
 118
 119 #define IWL_OFDM_BASIC_RATES_MASK   \
 120         (IWL_RATE_6M_MASK         | \
 121         IWL_RATE_12M_MASK         | \
 122         IWL_RATE_24M_MASK)
 123
 124 #define IWL_OFDM_RATES_MASK         \
 125        (IWL_OFDM_BASIC_RATES_MASK | \
 126         IWL_RATE_9M_MASK          | \
 127         IWL_RATE_18M_MASK         | \
 128         IWL_RATE_36M_MASK         | \
 129         IWL_RATE_48M_MASK         | \
 130         IWL_RATE_54M_MASK)
 131
 132 #define IWL_BASIC_RATES_MASK         \
 133         (IWL_OFDM_BASIC_RATES_MASK | \
 134          IWL_CCK_BASIC_RATES_MASK)
 135
 136 #define IWL_RATES_MASK ((1<<IWL_RATE_COUNT)-1)
 137
 138 #define IWL_INVALID_VALUE    -1
 139
 140 #define IWL_MIN_RSSI_VAL                 -100
 141 #define IWL_MAX_RSSI_VAL                    0
 142
 143 extern const struct iwl_rate_info iwl_rates[IWL_RATE_COUNT];
 144
 145 static inline u8 iwl_get_prev_ieee_rate(u8 rate_index)
 146 {
 147         u8 rate = iwl_rates[rate_index].prev_ieee;
 148
 149         if (rate == IWL_RATE_INVALID)
 150                 rate = rate_index;
 151         return rate;
 152 }
 153
 154 /**
 155  * iwl_fill_rs_info - Fill an output text buffer with the rate representation
 156  *
 157  * NOTE:  This is provided as a quick mechanism for a user to visualize
 158  * the performance of the rate control alogirthm and is not meant to be
 159  * parsed software.
 160  */
 161 extern int iwl_fill_rs_info(struct ieee80211_hw *, char *buf, u8 sta_id);
 162
 163 /**
 164  * iwl_rate_scale_init - Initialize the rate scale table based on assoc info
 165  *
 166  * The specific througput table used is based on the type of network
 167  * the associated with, including A, B, G, and G w/ TGG protection
 168  */
 169 extern void iwl_rate_scale_init(struct ieee80211_hw *hw, s32 sta_id);
 170
 171 /**
 172  * iwl_rate_control_register - Register the rate control algorithm callbacks
 173  *
 174  * Since the rate control algorithm is hardware specific, there is no need
 175  * or reason to place it as a stand alone module.  The driver can call
 176  * iwl_rate_control_register in order to register the rate control callbacks
 177  * with the mac80211 subsystem.  This should be performed prior to calling
 178  * ieee80211_register_hw
 179  *
 180  */
 181 extern void iwl_rate_control_register(struct ieee80211_hw *hw);
 182
 183 /**
 184  * iwl_rate_control_unregister - Unregister the rate control callbacks
 185  *
 186  * This should be called after calling ieee80211_unregister_hw, but before
 187  * the driver is unloaded.
 188  */
 189 extern void iwl_rate_control_unregister(struct ieee80211_hw *hw);
 190
 191 #endif