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kernel/linux-rt-4.4.41/drivers/net/wireless/iwlwifi/dvm/tt.h 4.53 KB
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  /******************************************************************************
   *
   * Copyright(c) 2007 - 2014 Intel Corporation. All rights reserved.
   *
   * Portions of this file are derived from the ipw3945 project, as well
   * as portions of the ieee80211 subsystem header files.
   *
   * This program is free software; you can redistribute it and/or modify it
   * under the terms of version 2 of the GNU General Public License as
   * published by the Free Software Foundation.
   *
   * This program is distributed in the hope that it will be useful, but WITHOUT
   * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
   * FITNESS FOR A PARTICULAR PURPOSE.  See the GNU General Public License for
   * more details.
   *
   * You should have received a copy of the GNU General Public License along with
   * this program; if not, write to the Free Software Foundation, Inc.,
   * 51 Franklin Street, Fifth Floor, Boston, MA 02110, USA
   *
   * The full GNU General Public License is included in this distribution in the
   * file called LICENSE.
   *
   * Contact Information:
   *  Intel Linux Wireless <ilw@linux.intel.com>
   * Intel Corporation, 5200 N.E. Elam Young Parkway, Hillsboro, OR 97124-6497
   *****************************************************************************/
  #ifndef __iwl_tt_setting_h__
  #define __iwl_tt_setting_h__
  
  #include "commands.h"
  
  #define IWL_ABSOLUTE_ZERO		0
  #define IWL_ABSOLUTE_MAX		0xFFFFFFFF
  #define IWL_TT_INCREASE_MARGIN	5
  #define IWL_TT_CT_KILL_MARGIN	3
  
  enum iwl_antenna_ok {
  	IWL_ANT_OK_NONE,
  	IWL_ANT_OK_SINGLE,
  	IWL_ANT_OK_MULTI,
  };
  
  /* Thermal Throttling State Machine states */
  enum  iwl_tt_state {
  	IWL_TI_0,	/* normal temperature, system power state */
  	IWL_TI_1,	/* high temperature detect, low power state */
  	IWL_TI_2,	/* higher temperature detected, lower power state */
  	IWL_TI_CT_KILL, /* critical temperature detected, lowest power state */
  	IWL_TI_STATE_MAX
  };
  
  /**
   * struct iwl_tt_restriction - Thermal Throttling restriction table
   * @tx_stream: number of tx stream allowed
   * @is_ht: ht enable/disable
   * @rx_stream: number of rx stream allowed
   *
   * This table is used by advance thermal throttling management
   * based on the current thermal throttling state, and determines
   * the number of tx/rx streams and the status of HT operation.
   */
  struct iwl_tt_restriction {
  	enum iwl_antenna_ok tx_stream;
  	enum iwl_antenna_ok rx_stream;
  	bool is_ht;
  };
  
  /**
   * struct iwl_tt_trans - Thermal Throttling transaction table
   * @next_state:  next thermal throttling mode
   * @tt_low: low temperature threshold to change state
   * @tt_high: high temperature threshold to change state
   *
   * This is used by the advanced thermal throttling algorithm
   * to determine the next thermal state to go based on the
   * current temperature.
   */
  struct iwl_tt_trans {
  	enum iwl_tt_state next_state;
  	u32 tt_low;
  	u32 tt_high;
  };
  
  /**
   * struct iwl_tt_mgnt - Thermal Throttling Management structure
   * @advanced_tt:    advanced thermal throttle required
   * @state:          current Thermal Throttling state
   * @tt_power_mode:  Thermal Throttling power mode index
   *		    being used to set power level when
   *		    when thermal throttling state != IWL_TI_0
   *		    the tt_power_mode should set to different
   *		    power mode based on the current tt state
   * @tt_previous_temperature: last measured temperature
   * @iwl_tt_restriction: ptr to restriction tbl, used by advance
   *		    thermal throttling to determine how many tx/rx streams
   *		    should be used in tt state; and can HT be enabled or not
   * @iwl_tt_trans: ptr to adv trans table, used by advance thermal throttling
   *		    state transaction
   * @ct_kill_toggle: used to toggle the CSR bit when checking uCode temperature
   * @ct_kill_exit_tm: timer to exit thermal kill
   */
  struct iwl_tt_mgmt {
  	enum iwl_tt_state state;
  	bool advanced_tt;
  	u8 tt_power_mode;
  	bool ct_kill_toggle;
  #ifdef CONFIG_IWLWIFI_DEBUG
  	s32 tt_previous_temp;
  #endif
  	struct iwl_tt_restriction *restriction;
  	struct iwl_tt_trans *transaction;
  	struct timer_list ct_kill_exit_tm;
  	struct timer_list ct_kill_waiting_tm;
  };
  
  u8 iwl_tt_current_power_mode(struct iwl_priv *priv);
  bool iwl_tt_is_low_power_state(struct iwl_priv *priv);
  bool iwl_ht_enabled(struct iwl_priv *priv);
  enum iwl_antenna_ok iwl_tx_ant_restriction(struct iwl_priv *priv);
  enum iwl_antenna_ok iwl_rx_ant_restriction(struct iwl_priv *priv);
  void iwl_tt_enter_ct_kill(struct iwl_priv *priv);
  void iwl_tt_exit_ct_kill(struct iwl_priv *priv);
  void iwl_tt_handler(struct iwl_priv *priv);
  void iwl_tt_initialize(struct iwl_priv *priv);
  void iwl_tt_exit(struct iwl_priv *priv);
  
  #endif  /* __iwl_tt_setting_h__ */