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

   1 /******************************************************************************
   2  *
   3  * Copyright(c) 2007 - 2011 Intel Corporation. All rights reserved.
   4  *
   5  * Portions of this file are derived from the ipw3945 project, as well
   6  * as portions of the ieee80211 subsystem header files.
   7  *
   8  * This program is free software; you can redistribute it and/or modify it
   9  * under the terms of version 2 of the GNU General Public License as
  10  * published by the Free Software Foundation.
  11  *
  12  * This program is distributed in the hope that it will be useful, but WITHOUT
  13  * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
  14  * FITNESS FOR A PARTICULAR PURPOSE.  See the GNU General Public License for
  15  * more details.
  16  *
  17  * You should have received a copy of the GNU General Public License along with
  18  * this program; if not, write to the Free Software Foundation, Inc.,
  19  * 51 Franklin Street, Fifth Floor, Boston, MA 02110, USA
  20  *
  21  * The full GNU General Public License is included in this distribution in the
  22  * file called LICENSE.
  23  *
  24  * Contact Information:
  25  *  Intel Linux Wireless <ilw@linux.intel.com>
  26  * Intel Corporation, 5200 N.E. Elam Young Parkway, Hillsboro, OR 97124-6497
  27  *****************************************************************************/
  28 #ifndef __iwl_tt_setting_h__
  29 #define __iwl_tt_setting_h__
  30
  31 #include "iwl-commands.h"
  32
  33 #define IWL_ABSOLUTE_ZERO               0
  34 #define IWL_ABSOLUTE_MAX                0xFFFFFFFF
  35 #define IWL_TT_INCREASE_MARGIN  5
  36 #define IWL_TT_CT_KILL_MARGIN   3
  37
  38 enum iwl_antenna_ok {
  39         IWL_ANT_OK_NONE,
  40         IWL_ANT_OK_SINGLE,
  41         IWL_ANT_OK_MULTI,
  42 };
  43
  44 /* Thermal Throttling State Machine states */
  45 enum  iwl_tt_state {
  46         IWL_TI_0,       /* normal temperature, system power state */
  47         IWL_TI_1,       /* high temperature detect, low power state */
  48         IWL_TI_2,       /* higher temperature detected, lower power state */
  49         IWL_TI_CT_KILL, /* critical temperature detected, lowest power state */
  50         IWL_TI_STATE_MAX
  51 };
  52
  53 /**
  54  * struct iwl_tt_restriction - Thermal Throttling restriction table
  55  * @tx_stream: number of tx stream allowed
  56  * @is_ht: ht enable/disable
  57  * @rx_stream: number of rx stream allowed
  58  *
  59  * This table is used by advance thermal throttling management
  60  * based on the current thermal throttling state, and determines
  61  * the number of tx/rx streams and the status of HT operation.
  62  */
  63 struct iwl_tt_restriction {
  64         enum iwl_antenna_ok tx_stream;
  65         enum iwl_antenna_ok rx_stream;
  66         bool is_ht;
  67 };
  68
  69 /**
  70  * struct iwl_tt_trans - Thermal Throttling transaction table
  71  * @next_state:  next thermal throttling mode
  72  * @tt_low: low temperature threshold to change state
  73  * @tt_high: high temperature threshold to change state
  74  *
  75  * This is used by the advanced thermal throttling algorithm
  76  * to determine the next thermal state to go based on the
  77  * current temperature.
  78  */
  79 struct iwl_tt_trans {
  80         enum iwl_tt_state next_state;
  81         u32 tt_low;
  82         u32 tt_high;
  83 };
  84
  85 /**
  86  * struct iwl_tt_mgnt - Thermal Throttling Management structure
  87  * @advanced_tt:    advanced thermal throttle required
  88  * @state:          current Thermal Throttling state
  89  * @tt_power_mode:  Thermal Throttling power mode index
  90  *                  being used to set power level when
  91  *                  when thermal throttling state != IWL_TI_0
  92  *                  the tt_power_mode should set to different
  93  *                  power mode based on the current tt state
  94  * @tt_previous_temperature: last measured temperature
  95  * @iwl_tt_restriction: ptr to restriction tbl, used by advance
  96  *                  thermal throttling to determine how many tx/rx streams
  97  *                  should be used in tt state; and can HT be enabled or not
  98  * @iwl_tt_trans: ptr to adv trans table, used by advance thermal throttling
  99  *                  state transaction
 100  * @ct_kill_toggle: used to toggle the CSR bit when checking uCode temperature
 101  * @ct_kill_exit_tm: timer to exit thermal kill
 102  */
 103 struct iwl_tt_mgmt {
 104         enum iwl_tt_state state;
 105         bool advanced_tt;
 106         u8 tt_power_mode;
 107         bool ct_kill_toggle;
 108 #ifdef CONFIG_IWLWIFI_DEBUG
 109         s32 tt_previous_temp;
 110 #endif
 111         struct iwl_tt_restriction *restriction;
 112         struct iwl_tt_trans *transaction;
 113         struct timer_list ct_kill_exit_tm;
 114         struct timer_list ct_kill_waiting_tm;
 115 };
 116
 117 u8 iwl_tt_current_power_mode(struct iwl_priv *priv);
 118 bool iwl_tt_is_low_power_state(struct iwl_priv *priv);
 119 bool iwl_ht_enabled(struct iwl_priv *priv);
 120 enum iwl_antenna_ok iwl_tx_ant_restriction(struct iwl_priv *priv);
 121 enum iwl_antenna_ok iwl_rx_ant_restriction(struct iwl_priv *priv);
 122 void iwl_tt_enter_ct_kill(struct iwl_priv *priv);
 123 void iwl_tt_exit_ct_kill(struct iwl_priv *priv);
 124 void iwl_tt_handler(struct iwl_priv *priv);
 125 void iwl_tt_initialize(struct iwl_priv *priv);
 126 void iwl_tt_exit(struct iwl_priv *priv);
 127
 128 #endif  /* __iwl_tt_setting_h__ */