linux/drivers/net/wireless/iwlwifi/iwl-power.h
Wey-Yi Guy 39b73fb15e iwlwifi: Thermal Throttling Management - Part 1
Part 1 of Thermal Throttling Management -

Thermal Throttling feature is used to put NIC into low power state when
driver detect the Radio temperature reach pre-defined threshold

Two Thermal Throttling Management Methods; this patch introduce the
Legacy Thermal Management:
   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

Once get into CT_KILL state, uCode go into sleep, driver will stop all
the active queues, then move to IWL_TI_CT_KILL state; also set up 5
seconds timer to toggle CSR flag, uCode wake up upon CSR flag change,
then measure the temperature.
If temperature is above CT_KILL exit threshold, uCode go backto sleep;
if temperature is below CT_KILL exit threshold, uCode send Card State
Notification response with appropriate CT_KILL status flag, and uCode
remain awake, Driver receive Card State Notification Response and update
the card temperature to the CT_KILL exit threshold.

Signed-off-by: Wey-Yi Guy <wey-yi.w.guy@intel.com>
Signed-off-by: Reinette Chatre <reinette.chatre@intel.com>
Signed-off-by: John W. Linville <linville@tuxdriver.com>
2009-07-27 15:24:20 -04:00

111 lines
3.7 KiB
C

/******************************************************************************
*
* Copyright(c) 2007 - 2009 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_power_setting_h__
#define __iwl_power_setting_h__
#include <net/mac80211.h>
#include "iwl-commands.h"
struct iwl_priv;
#define IWL_TT_INCREASE_MARGIN 5
/* 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_mgnt - Thermal Throttling Management structure
* @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
* @sys_power_mode: previous system power mode
* before transition into TT state
* @tt_previous_temperature: last measured temperature
*/
struct iwl_tt_mgmt {
enum iwl_tt_state state;
u8 tt_power_mode;
u8 sys_power_mode;
#ifdef CONFIG_IWLWIFI_DEBUG
s32 tt_previous_temp;
#endif
};
enum {
IWL_POWER_MODE_CAM, /* Continuously Aware Mode, always on */
IWL_POWER_INDEX_1,
IWL_POWER_INDEX_2,
IWL_POWER_INDEX_3,
IWL_POWER_INDEX_4,
IWL_POWER_INDEX_5,
IWL_POWER_NUM
};
/* Power management (not Tx power) structures */
struct iwl_power_vec_entry {
struct iwl_powertable_cmd cmd;
u8 no_dtim;
};
struct iwl_power_mgr {
struct iwl_power_vec_entry pwr_range_0[IWL_POWER_NUM];
struct iwl_power_vec_entry pwr_range_1[IWL_POWER_NUM];
struct iwl_power_vec_entry pwr_range_2[IWL_POWER_NUM];
u32 dtim_period;
/* final power level that used to calculate final power command */
u8 power_mode;
u8 user_power_setting; /* set by user through sysfs */
u8 power_disabled; /* set by mac80211's CONF_PS */
struct iwl_tt_mgmt tt; /* Thermal Throttling Management */
bool ct_kill_toggle; /* use to toggle the CSR bit when
* checking uCode temperature
*/
struct timer_list ct_kill_exit_tm;
};
int iwl_power_update_mode(struct iwl_priv *priv, bool force);
int iwl_power_set_user_mode(struct iwl_priv *priv, u16 mode);
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);
void iwl_power_initialize(struct iwl_priv *priv);
#endif /* __iwl_power_setting_h__ */