forked from Minki/linux
91dd6c27a2
Includes minor improvements in debugging messages in iwl-4965.c, function iwl4965_is_temp_calib_needed(). Signed-off-by: Frans Pop <elendil@planet.nl> Cc: Zhu Yi <yi.zhu@intel.com> Cc: Reinette Chatre <reinette.chatre@intel.com> Cc: Intel Linux Wireless <ilw@linux.intel.com> Signed-off-by: Reinette Chatre <reinette.chatre@intel.com>
971 lines
31 KiB
C
971 lines
31 KiB
C
/******************************************************************************
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*
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* Copyright(c) 2007 - 2010 Intel Corporation. All rights reserved.
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*
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* Portions of this file are derived from the ipw3945 project, as well
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* as portions of the ieee80211 subsystem header files.
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*
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* This program is free software; you can redistribute it and/or modify it
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* under the terms of version 2 of the GNU General Public License as
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* published by the Free Software Foundation.
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*
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* This program is distributed in the hope that it will be useful, but WITHOUT
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* ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
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* FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License for
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* more details.
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*
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* You should have received a copy of the GNU General Public License along with
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* this program; if not, write to the Free Software Foundation, Inc.,
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* 51 Franklin Street, Fifth Floor, Boston, MA 02110, USA
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*
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* The full GNU General Public License is included in this distribution in the
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* file called LICENSE.
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*
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* Contact Information:
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* Intel Linux Wireless <ilw@linux.intel.com>
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* Intel Corporation, 5200 N.E. Elam Young Parkway, Hillsboro, OR 97124-6497
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*****************************************************************************/
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#include <linux/kernel.h>
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#include <linux/module.h>
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#include <linux/init.h>
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#include <net/mac80211.h>
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#include "iwl-eeprom.h"
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#include "iwl-dev.h"
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#include "iwl-core.h"
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#include "iwl-io.h"
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#include "iwl-commands.h"
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#include "iwl-debug.h"
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#include "iwl-power.h"
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/*
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* Setting power level allows the card to go to sleep when not busy.
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*
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* We calculate a sleep command based on the required latency, which
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* we get from mac80211. In order to handle thermal throttling, we can
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* also use pre-defined power levels.
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*/
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/*
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* For now, keep using power level 1 instead of automatically
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* adjusting ...
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*/
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bool no_sleep_autoadjust = true;
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module_param(no_sleep_autoadjust, bool, S_IRUGO);
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MODULE_PARM_DESC(no_sleep_autoadjust,
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"don't automatically adjust sleep level "
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"according to maximum network latency");
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/*
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* This defines the old power levels. They are still used by default
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* (level 1) and for thermal throttle (levels 3 through 5)
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*/
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struct iwl_power_vec_entry {
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struct iwl_powertable_cmd cmd;
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u8 no_dtim; /* number of skip dtim */
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};
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#define IWL_DTIM_RANGE_0_MAX 2
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#define IWL_DTIM_RANGE_1_MAX 10
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#define NOSLP cpu_to_le16(0), 0, 0
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#define SLP IWL_POWER_DRIVER_ALLOW_SLEEP_MSK, 0, 0
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#define TU_TO_USEC 1024
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#define SLP_TOUT(T) cpu_to_le32((T) * TU_TO_USEC)
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#define SLP_VEC(X0, X1, X2, X3, X4) {cpu_to_le32(X0), \
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cpu_to_le32(X1), \
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cpu_to_le32(X2), \
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cpu_to_le32(X3), \
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cpu_to_le32(X4)}
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/* default power management (not Tx power) table values */
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/* for DTIM period 0 through IWL_DTIM_RANGE_0_MAX */
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/* DTIM 0 - 2 */
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static const struct iwl_power_vec_entry range_0[IWL_POWER_NUM] = {
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{{SLP, SLP_TOUT(200), SLP_TOUT(500), SLP_VEC(1, 1, 2, 2, 0xFF)}, 0},
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{{SLP, SLP_TOUT(200), SLP_TOUT(300), SLP_VEC(1, 2, 2, 2, 0xFF)}, 0},
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{{SLP, SLP_TOUT(50), SLP_TOUT(100), SLP_VEC(2, 2, 2, 2, 0xFF)}, 0},
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{{SLP, SLP_TOUT(50), SLP_TOUT(25), SLP_VEC(2, 2, 4, 4, 0xFF)}, 1},
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{{SLP, SLP_TOUT(25), SLP_TOUT(25), SLP_VEC(2, 2, 4, 6, 0xFF)}, 2}
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};
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/* for DTIM period IWL_DTIM_RANGE_0_MAX + 1 through IWL_DTIM_RANGE_1_MAX */
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/* DTIM 3 - 10 */
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static const struct iwl_power_vec_entry range_1[IWL_POWER_NUM] = {
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{{SLP, SLP_TOUT(200), SLP_TOUT(500), SLP_VEC(1, 2, 3, 4, 4)}, 0},
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{{SLP, SLP_TOUT(200), SLP_TOUT(300), SLP_VEC(1, 2, 3, 4, 7)}, 0},
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{{SLP, SLP_TOUT(50), SLP_TOUT(100), SLP_VEC(2, 4, 6, 7, 9)}, 0},
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{{SLP, SLP_TOUT(50), SLP_TOUT(25), SLP_VEC(2, 4, 6, 9, 10)}, 1},
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{{SLP, SLP_TOUT(25), SLP_TOUT(25), SLP_VEC(2, 4, 6, 10, 10)}, 2}
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};
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/* for DTIM period > IWL_DTIM_RANGE_1_MAX */
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/* DTIM 11 - */
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static const struct iwl_power_vec_entry range_2[IWL_POWER_NUM] = {
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{{SLP, SLP_TOUT(200), SLP_TOUT(500), SLP_VEC(1, 2, 3, 4, 0xFF)}, 0},
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{{SLP, SLP_TOUT(200), SLP_TOUT(300), SLP_VEC(2, 4, 6, 7, 0xFF)}, 0},
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{{SLP, SLP_TOUT(50), SLP_TOUT(100), SLP_VEC(2, 7, 9, 9, 0xFF)}, 0},
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{{SLP, SLP_TOUT(50), SLP_TOUT(25), SLP_VEC(2, 7, 9, 9, 0xFF)}, 0},
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{{SLP, SLP_TOUT(25), SLP_TOUT(25), SLP_VEC(4, 7, 10, 10, 0xFF)}, 0}
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};
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static void iwl_static_sleep_cmd(struct iwl_priv *priv,
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struct iwl_powertable_cmd *cmd,
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enum iwl_power_level lvl, int period)
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{
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const struct iwl_power_vec_entry *table;
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int max_sleep[IWL_POWER_VEC_SIZE] = { 0 };
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int i;
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u8 skip;
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u32 slp_itrvl;
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table = range_2;
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if (period <= IWL_DTIM_RANGE_1_MAX)
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table = range_1;
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if (period <= IWL_DTIM_RANGE_0_MAX)
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table = range_0;
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BUG_ON(lvl < 0 || lvl >= IWL_POWER_NUM);
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*cmd = table[lvl].cmd;
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if (period == 0) {
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skip = 0;
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period = 1;
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for (i = 0; i < IWL_POWER_VEC_SIZE; i++)
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max_sleep[i] = 1;
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} else {
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skip = table[lvl].no_dtim;
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for (i = 0; i < IWL_POWER_VEC_SIZE; i++)
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max_sleep[i] = le32_to_cpu(cmd->sleep_interval[i]);
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max_sleep[IWL_POWER_VEC_SIZE - 1] = skip + 1;
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}
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slp_itrvl = le32_to_cpu(cmd->sleep_interval[IWL_POWER_VEC_SIZE - 1]);
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/* figure out the listen interval based on dtim period and skip */
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if (slp_itrvl == 0xFF)
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cmd->sleep_interval[IWL_POWER_VEC_SIZE - 1] =
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cpu_to_le32(period * (skip + 1));
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slp_itrvl = le32_to_cpu(cmd->sleep_interval[IWL_POWER_VEC_SIZE - 1]);
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if (slp_itrvl > period)
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cmd->sleep_interval[IWL_POWER_VEC_SIZE - 1] =
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cpu_to_le32((slp_itrvl / period) * period);
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if (skip)
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cmd->flags |= IWL_POWER_SLEEP_OVER_DTIM_MSK;
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else
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cmd->flags &= ~IWL_POWER_SLEEP_OVER_DTIM_MSK;
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slp_itrvl = le32_to_cpu(cmd->sleep_interval[IWL_POWER_VEC_SIZE - 1]);
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if (slp_itrvl > IWL_CONN_MAX_LISTEN_INTERVAL)
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cmd->sleep_interval[IWL_POWER_VEC_SIZE - 1] =
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cpu_to_le32(IWL_CONN_MAX_LISTEN_INTERVAL);
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/* enforce max sleep interval */
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for (i = IWL_POWER_VEC_SIZE - 1; i >= 0 ; i--) {
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if (le32_to_cpu(cmd->sleep_interval[i]) >
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(max_sleep[i] * period))
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cmd->sleep_interval[i] =
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cpu_to_le32(max_sleep[i] * period);
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if (i != (IWL_POWER_VEC_SIZE - 1)) {
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if (le32_to_cpu(cmd->sleep_interval[i]) >
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le32_to_cpu(cmd->sleep_interval[i+1]))
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cmd->sleep_interval[i] =
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cmd->sleep_interval[i+1];
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}
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}
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if (priv->power_data.pci_pm)
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cmd->flags |= IWL_POWER_PCI_PM_MSK;
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else
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cmd->flags &= ~IWL_POWER_PCI_PM_MSK;
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IWL_DEBUG_POWER(priv, "numSkipDtim = %u, dtimPeriod = %d\n",
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skip, period);
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IWL_DEBUG_POWER(priv, "Sleep command for index %d\n", lvl + 1);
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}
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/* default Thermal Throttling transaction table
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* Current state | Throttling Down | Throttling Up
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*=============================================================================
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* Condition Nxt State Condition Nxt State Condition Nxt State
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*-----------------------------------------------------------------------------
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* IWL_TI_0 T >= 114 CT_KILL 114>T>=105 TI_1 N/A N/A
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* IWL_TI_1 T >= 114 CT_KILL 114>T>=110 TI_2 T<=95 TI_0
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* IWL_TI_2 T >= 114 CT_KILL T<=100 TI_1
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* IWL_CT_KILL N/A N/A N/A N/A T<=95 TI_0
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*=============================================================================
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*/
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static const struct iwl_tt_trans tt_range_0[IWL_TI_STATE_MAX - 1] = {
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{IWL_TI_0, IWL_ABSOLUTE_ZERO, 104},
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{IWL_TI_1, 105, CT_KILL_THRESHOLD - 1},
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{IWL_TI_CT_KILL, CT_KILL_THRESHOLD, IWL_ABSOLUTE_MAX}
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};
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static const struct iwl_tt_trans tt_range_1[IWL_TI_STATE_MAX - 1] = {
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{IWL_TI_0, IWL_ABSOLUTE_ZERO, 95},
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{IWL_TI_2, 110, CT_KILL_THRESHOLD - 1},
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{IWL_TI_CT_KILL, CT_KILL_THRESHOLD, IWL_ABSOLUTE_MAX}
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};
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static const struct iwl_tt_trans tt_range_2[IWL_TI_STATE_MAX - 1] = {
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{IWL_TI_1, IWL_ABSOLUTE_ZERO, 100},
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{IWL_TI_CT_KILL, CT_KILL_THRESHOLD, IWL_ABSOLUTE_MAX},
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{IWL_TI_CT_KILL, CT_KILL_THRESHOLD, IWL_ABSOLUTE_MAX}
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};
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static const struct iwl_tt_trans tt_range_3[IWL_TI_STATE_MAX - 1] = {
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{IWL_TI_0, IWL_ABSOLUTE_ZERO, CT_KILL_EXIT_THRESHOLD},
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{IWL_TI_CT_KILL, CT_KILL_EXIT_THRESHOLD + 1, IWL_ABSOLUTE_MAX},
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{IWL_TI_CT_KILL, CT_KILL_EXIT_THRESHOLD + 1, IWL_ABSOLUTE_MAX}
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};
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/* Advance Thermal Throttling default restriction table */
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static const struct iwl_tt_restriction restriction_range[IWL_TI_STATE_MAX] = {
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{IWL_ANT_OK_MULTI, IWL_ANT_OK_MULTI, true },
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{IWL_ANT_OK_SINGLE, IWL_ANT_OK_MULTI, true },
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{IWL_ANT_OK_SINGLE, IWL_ANT_OK_SINGLE, false },
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{IWL_ANT_OK_NONE, IWL_ANT_OK_NONE, false }
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};
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static void iwl_power_sleep_cam_cmd(struct iwl_priv *priv,
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struct iwl_powertable_cmd *cmd)
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{
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memset(cmd, 0, sizeof(*cmd));
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if (priv->power_data.pci_pm)
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cmd->flags |= IWL_POWER_PCI_PM_MSK;
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IWL_DEBUG_POWER(priv, "Sleep command for CAM\n");
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}
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static void iwl_power_fill_sleep_cmd(struct iwl_priv *priv,
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struct iwl_powertable_cmd *cmd,
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int dynps_ms, int wakeup_period)
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{
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/*
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* These are the original power level 3 sleep successions. The
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* device may behave better with such succession and was also
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* only tested with that. Just like the original sleep commands,
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* also adjust the succession here to the wakeup_period below.
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* The ranges are the same as for the sleep commands, 0-2, 3-9
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* and >10, which is selected based on the DTIM interval for
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* the sleep index but here we use the wakeup period since that
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* is what we need to do for the latency requirements.
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*/
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static const u8 slp_succ_r0[IWL_POWER_VEC_SIZE] = { 2, 2, 2, 2, 2 };
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static const u8 slp_succ_r1[IWL_POWER_VEC_SIZE] = { 2, 4, 6, 7, 9 };
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static const u8 slp_succ_r2[IWL_POWER_VEC_SIZE] = { 2, 7, 9, 9, 0xFF };
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const u8 *slp_succ = slp_succ_r0;
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int i;
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if (wakeup_period > IWL_DTIM_RANGE_0_MAX)
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slp_succ = slp_succ_r1;
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if (wakeup_period > IWL_DTIM_RANGE_1_MAX)
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slp_succ = slp_succ_r2;
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memset(cmd, 0, sizeof(*cmd));
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cmd->flags = IWL_POWER_DRIVER_ALLOW_SLEEP_MSK |
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IWL_POWER_FAST_PD; /* no use seeing frames for others */
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if (priv->power_data.pci_pm)
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cmd->flags |= IWL_POWER_PCI_PM_MSK;
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cmd->rx_data_timeout = cpu_to_le32(1000 * dynps_ms);
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cmd->tx_data_timeout = cpu_to_le32(1000 * dynps_ms);
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for (i = 0; i < IWL_POWER_VEC_SIZE; i++)
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cmd->sleep_interval[i] =
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cpu_to_le32(min_t(int, slp_succ[i], wakeup_period));
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IWL_DEBUG_POWER(priv, "Automatic sleep command\n");
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}
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static int iwl_set_power(struct iwl_priv *priv, struct iwl_powertable_cmd *cmd)
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{
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IWL_DEBUG_POWER(priv, "Sending power/sleep command\n");
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IWL_DEBUG_POWER(priv, "Flags value = 0x%08X\n", cmd->flags);
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IWL_DEBUG_POWER(priv, "Tx timeout = %u\n", le32_to_cpu(cmd->tx_data_timeout));
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IWL_DEBUG_POWER(priv, "Rx timeout = %u\n", le32_to_cpu(cmd->rx_data_timeout));
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IWL_DEBUG_POWER(priv, "Sleep interval vector = { %d , %d , %d , %d , %d }\n",
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le32_to_cpu(cmd->sleep_interval[0]),
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le32_to_cpu(cmd->sleep_interval[1]),
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le32_to_cpu(cmd->sleep_interval[2]),
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le32_to_cpu(cmd->sleep_interval[3]),
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le32_to_cpu(cmd->sleep_interval[4]));
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return iwl_send_cmd_pdu(priv, POWER_TABLE_CMD,
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sizeof(struct iwl_powertable_cmd), cmd);
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}
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/* priv->mutex must be held */
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int iwl_power_update_mode(struct iwl_priv *priv, bool force)
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{
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int ret = 0;
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struct iwl_tt_mgmt *tt = &priv->thermal_throttle;
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bool enabled = priv->hw->conf.flags & IEEE80211_CONF_PS;
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bool update_chains;
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struct iwl_powertable_cmd cmd;
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int dtimper;
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/* Don't update the RX chain when chain noise calibration is running */
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update_chains = priv->chain_noise_data.state == IWL_CHAIN_NOISE_DONE ||
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priv->chain_noise_data.state == IWL_CHAIN_NOISE_ALIVE;
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if (priv->vif)
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dtimper = priv->hw->conf.ps_dtim_period;
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else
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dtimper = 1;
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if (priv->cfg->broken_powersave)
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iwl_power_sleep_cam_cmd(priv, &cmd);
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else if (priv->cfg->supports_idle &&
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priv->hw->conf.flags & IEEE80211_CONF_IDLE)
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iwl_static_sleep_cmd(priv, &cmd, IWL_POWER_INDEX_5, 20);
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else if (tt->state >= IWL_TI_1)
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iwl_static_sleep_cmd(priv, &cmd, tt->tt_power_mode, dtimper);
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else if (!enabled)
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iwl_power_sleep_cam_cmd(priv, &cmd);
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else if (priv->power_data.debug_sleep_level_override >= 0)
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iwl_static_sleep_cmd(priv, &cmd,
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priv->power_data.debug_sleep_level_override,
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dtimper);
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else if (no_sleep_autoadjust)
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iwl_static_sleep_cmd(priv, &cmd, IWL_POWER_INDEX_1, dtimper);
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else
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iwl_power_fill_sleep_cmd(priv, &cmd,
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priv->hw->conf.dynamic_ps_timeout,
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priv->hw->conf.max_sleep_period);
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if (iwl_is_ready_rf(priv) &&
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(memcmp(&priv->power_data.sleep_cmd, &cmd, sizeof(cmd)) || force)) {
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if (cmd.flags & IWL_POWER_DRIVER_ALLOW_SLEEP_MSK)
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set_bit(STATUS_POWER_PMI, &priv->status);
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ret = iwl_set_power(priv, &cmd);
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if (!ret) {
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if (!(cmd.flags & IWL_POWER_DRIVER_ALLOW_SLEEP_MSK))
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clear_bit(STATUS_POWER_PMI, &priv->status);
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if (priv->cfg->ops->lib->update_chain_flags &&
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update_chains)
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priv->cfg->ops->lib->update_chain_flags(priv);
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else if (priv->cfg->ops->lib->update_chain_flags)
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IWL_DEBUG_POWER(priv,
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"Cannot update the power, chain noise "
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"calibration running: %d\n",
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priv->chain_noise_data.state);
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memcpy(&priv->power_data.sleep_cmd, &cmd, sizeof(cmd));
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} else
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IWL_ERR(priv, "set power fail, ret = %d", ret);
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}
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return ret;
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}
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EXPORT_SYMBOL(iwl_power_update_mode);
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bool iwl_ht_enabled(struct iwl_priv *priv)
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{
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struct iwl_tt_mgmt *tt = &priv->thermal_throttle;
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struct iwl_tt_restriction *restriction;
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if (!priv->thermal_throttle.advanced_tt)
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return true;
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restriction = tt->restriction + tt->state;
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return restriction->is_ht;
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}
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EXPORT_SYMBOL(iwl_ht_enabled);
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bool iwl_within_ct_kill_margin(struct iwl_priv *priv)
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{
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s32 temp = priv->temperature; /* degrees CELSIUS except specified */
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bool within_margin = false;
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if (priv->cfg->temperature_kelvin)
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temp = KELVIN_TO_CELSIUS(priv->temperature);
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if (!priv->thermal_throttle.advanced_tt)
|
|
within_margin = ((temp + IWL_TT_CT_KILL_MARGIN) >=
|
|
CT_KILL_THRESHOLD_LEGACY) ? true : false;
|
|
else
|
|
within_margin = ((temp + IWL_TT_CT_KILL_MARGIN) >=
|
|
CT_KILL_THRESHOLD) ? true : false;
|
|
return within_margin;
|
|
}
|
|
|
|
enum iwl_antenna_ok iwl_tx_ant_restriction(struct iwl_priv *priv)
|
|
{
|
|
struct iwl_tt_mgmt *tt = &priv->thermal_throttle;
|
|
struct iwl_tt_restriction *restriction;
|
|
|
|
if (!priv->thermal_throttle.advanced_tt)
|
|
return IWL_ANT_OK_MULTI;
|
|
restriction = tt->restriction + tt->state;
|
|
return restriction->tx_stream;
|
|
}
|
|
EXPORT_SYMBOL(iwl_tx_ant_restriction);
|
|
|
|
enum iwl_antenna_ok iwl_rx_ant_restriction(struct iwl_priv *priv)
|
|
{
|
|
struct iwl_tt_mgmt *tt = &priv->thermal_throttle;
|
|
struct iwl_tt_restriction *restriction;
|
|
|
|
if (!priv->thermal_throttle.advanced_tt)
|
|
return IWL_ANT_OK_MULTI;
|
|
restriction = tt->restriction + tt->state;
|
|
return restriction->rx_stream;
|
|
}
|
|
|
|
#define CT_KILL_EXIT_DURATION (5) /* 5 seconds duration */
|
|
#define CT_KILL_WAITING_DURATION (300) /* 300ms duration */
|
|
|
|
/*
|
|
* toggle the bit to wake up uCode and check the temperature
|
|
* if the temperature is below CT, uCode will stay awake and send card
|
|
* state notification with CT_KILL bit clear to inform Thermal Throttling
|
|
* Management to change state. Otherwise, uCode will go back to sleep
|
|
* without doing anything, driver should continue the 5 seconds timer
|
|
* to wake up uCode for temperature check until temperature drop below CT
|
|
*/
|
|
static void iwl_tt_check_exit_ct_kill(unsigned long data)
|
|
{
|
|
struct iwl_priv *priv = (struct iwl_priv *)data;
|
|
struct iwl_tt_mgmt *tt = &priv->thermal_throttle;
|
|
unsigned long flags;
|
|
|
|
if (test_bit(STATUS_EXIT_PENDING, &priv->status))
|
|
return;
|
|
|
|
if (tt->state == IWL_TI_CT_KILL) {
|
|
if (priv->thermal_throttle.ct_kill_toggle) {
|
|
iwl_write32(priv, CSR_UCODE_DRV_GP1_CLR,
|
|
CSR_UCODE_DRV_GP1_REG_BIT_CT_KILL_EXIT);
|
|
priv->thermal_throttle.ct_kill_toggle = false;
|
|
} else {
|
|
iwl_write32(priv, CSR_UCODE_DRV_GP1_SET,
|
|
CSR_UCODE_DRV_GP1_REG_BIT_CT_KILL_EXIT);
|
|
priv->thermal_throttle.ct_kill_toggle = true;
|
|
}
|
|
iwl_read32(priv, CSR_UCODE_DRV_GP1);
|
|
spin_lock_irqsave(&priv->reg_lock, flags);
|
|
if (!iwl_grab_nic_access(priv))
|
|
iwl_release_nic_access(priv);
|
|
spin_unlock_irqrestore(&priv->reg_lock, flags);
|
|
|
|
/* Reschedule the ct_kill timer to occur in
|
|
* CT_KILL_EXIT_DURATION seconds to ensure we get a
|
|
* thermal update */
|
|
IWL_DEBUG_POWER(priv, "schedule ct_kill exit timer\n");
|
|
mod_timer(&priv->thermal_throttle.ct_kill_exit_tm, jiffies +
|
|
CT_KILL_EXIT_DURATION * HZ);
|
|
}
|
|
}
|
|
|
|
static void iwl_perform_ct_kill_task(struct iwl_priv *priv,
|
|
bool stop)
|
|
{
|
|
if (stop) {
|
|
IWL_DEBUG_POWER(priv, "Stop all queues\n");
|
|
if (priv->mac80211_registered)
|
|
ieee80211_stop_queues(priv->hw);
|
|
IWL_DEBUG_POWER(priv,
|
|
"Schedule 5 seconds CT_KILL Timer\n");
|
|
mod_timer(&priv->thermal_throttle.ct_kill_exit_tm, jiffies +
|
|
CT_KILL_EXIT_DURATION * HZ);
|
|
} else {
|
|
IWL_DEBUG_POWER(priv, "Wake all queues\n");
|
|
if (priv->mac80211_registered)
|
|
ieee80211_wake_queues(priv->hw);
|
|
}
|
|
}
|
|
|
|
static void iwl_tt_ready_for_ct_kill(unsigned long data)
|
|
{
|
|
struct iwl_priv *priv = (struct iwl_priv *)data;
|
|
struct iwl_tt_mgmt *tt = &priv->thermal_throttle;
|
|
|
|
if (test_bit(STATUS_EXIT_PENDING, &priv->status))
|
|
return;
|
|
|
|
/* temperature timer expired, ready to go into CT_KILL state */
|
|
if (tt->state != IWL_TI_CT_KILL) {
|
|
IWL_DEBUG_POWER(priv, "entering CT_KILL state when temperature timer expired\n");
|
|
tt->state = IWL_TI_CT_KILL;
|
|
set_bit(STATUS_CT_KILL, &priv->status);
|
|
iwl_perform_ct_kill_task(priv, true);
|
|
}
|
|
}
|
|
|
|
static void iwl_prepare_ct_kill_task(struct iwl_priv *priv)
|
|
{
|
|
IWL_DEBUG_POWER(priv, "Prepare to enter IWL_TI_CT_KILL\n");
|
|
/* make request to retrieve statistics information */
|
|
iwl_send_statistics_request(priv, CMD_SYNC, false);
|
|
/* Reschedule the ct_kill wait timer */
|
|
mod_timer(&priv->thermal_throttle.ct_kill_waiting_tm,
|
|
jiffies + msecs_to_jiffies(CT_KILL_WAITING_DURATION));
|
|
}
|
|
|
|
#define IWL_MINIMAL_POWER_THRESHOLD (CT_KILL_THRESHOLD_LEGACY)
|
|
#define IWL_REDUCED_PERFORMANCE_THRESHOLD_2 (100)
|
|
#define IWL_REDUCED_PERFORMANCE_THRESHOLD_1 (90)
|
|
|
|
/*
|
|
* Legacy thermal throttling
|
|
* 1) Avoid NIC destruction due to high temperatures
|
|
* Chip will identify dangerously high temperatures that can
|
|
* harm the device and will power down
|
|
* 2) Avoid the NIC power down due to high temperature
|
|
* Throttle early enough to lower the power consumption before
|
|
* drastic steps are needed
|
|
*/
|
|
static void iwl_legacy_tt_handler(struct iwl_priv *priv, s32 temp, bool force)
|
|
{
|
|
struct iwl_tt_mgmt *tt = &priv->thermal_throttle;
|
|
enum iwl_tt_state old_state;
|
|
|
|
#ifdef CONFIG_IWLWIFI_DEBUG
|
|
if ((tt->tt_previous_temp) &&
|
|
(temp > tt->tt_previous_temp) &&
|
|
((temp - tt->tt_previous_temp) >
|
|
IWL_TT_INCREASE_MARGIN)) {
|
|
IWL_DEBUG_POWER(priv,
|
|
"Temperature increase %d degree Celsius\n",
|
|
(temp - tt->tt_previous_temp));
|
|
}
|
|
#endif
|
|
old_state = tt->state;
|
|
/* in Celsius */
|
|
if (temp >= IWL_MINIMAL_POWER_THRESHOLD)
|
|
tt->state = IWL_TI_CT_KILL;
|
|
else if (temp >= IWL_REDUCED_PERFORMANCE_THRESHOLD_2)
|
|
tt->state = IWL_TI_2;
|
|
else if (temp >= IWL_REDUCED_PERFORMANCE_THRESHOLD_1)
|
|
tt->state = IWL_TI_1;
|
|
else
|
|
tt->state = IWL_TI_0;
|
|
|
|
#ifdef CONFIG_IWLWIFI_DEBUG
|
|
tt->tt_previous_temp = temp;
|
|
#endif
|
|
/* stop ct_kill_waiting_tm timer */
|
|
del_timer_sync(&priv->thermal_throttle.ct_kill_waiting_tm);
|
|
if (tt->state != old_state) {
|
|
switch (tt->state) {
|
|
case IWL_TI_0:
|
|
/*
|
|
* When the system is ready to go back to IWL_TI_0
|
|
* we only have to call iwl_power_update_mode() to
|
|
* do so.
|
|
*/
|
|
break;
|
|
case IWL_TI_1:
|
|
tt->tt_power_mode = IWL_POWER_INDEX_3;
|
|
break;
|
|
case IWL_TI_2:
|
|
tt->tt_power_mode = IWL_POWER_INDEX_4;
|
|
break;
|
|
default:
|
|
tt->tt_power_mode = IWL_POWER_INDEX_5;
|
|
break;
|
|
}
|
|
mutex_lock(&priv->mutex);
|
|
if (old_state == IWL_TI_CT_KILL)
|
|
clear_bit(STATUS_CT_KILL, &priv->status);
|
|
if (tt->state != IWL_TI_CT_KILL &&
|
|
iwl_power_update_mode(priv, true)) {
|
|
/* TT state not updated
|
|
* try again during next temperature read
|
|
*/
|
|
if (old_state == IWL_TI_CT_KILL)
|
|
set_bit(STATUS_CT_KILL, &priv->status);
|
|
tt->state = old_state;
|
|
IWL_ERR(priv, "Cannot update power mode, "
|
|
"TT state not updated\n");
|
|
} else {
|
|
if (tt->state == IWL_TI_CT_KILL) {
|
|
if (force) {
|
|
set_bit(STATUS_CT_KILL, &priv->status);
|
|
iwl_perform_ct_kill_task(priv, true);
|
|
} else {
|
|
iwl_prepare_ct_kill_task(priv);
|
|
tt->state = old_state;
|
|
}
|
|
} else if (old_state == IWL_TI_CT_KILL &&
|
|
tt->state != IWL_TI_CT_KILL)
|
|
iwl_perform_ct_kill_task(priv, false);
|
|
IWL_DEBUG_POWER(priv, "Temperature state changed %u\n",
|
|
tt->state);
|
|
IWL_DEBUG_POWER(priv, "Power Index change to %u\n",
|
|
tt->tt_power_mode);
|
|
}
|
|
mutex_unlock(&priv->mutex);
|
|
}
|
|
}
|
|
|
|
/*
|
|
* Advance thermal throttling
|
|
* 1) Avoid NIC destruction due to high temperatures
|
|
* Chip will identify dangerously high temperatures that can
|
|
* harm the device and will power down
|
|
* 2) Avoid the NIC power down due to high temperature
|
|
* Throttle early enough to lower the power consumption before
|
|
* drastic steps are needed
|
|
* Actions include relaxing the power down sleep thresholds and
|
|
* decreasing the number of TX streams
|
|
* 3) Avoid throughput performance impact as much as possible
|
|
*
|
|
*=============================================================================
|
|
* Condition Nxt State Condition Nxt State Condition Nxt State
|
|
*-----------------------------------------------------------------------------
|
|
* IWL_TI_0 T >= 114 CT_KILL 114>T>=105 TI_1 N/A N/A
|
|
* IWL_TI_1 T >= 114 CT_KILL 114>T>=110 TI_2 T<=95 TI_0
|
|
* IWL_TI_2 T >= 114 CT_KILL T<=100 TI_1
|
|
* IWL_CT_KILL N/A N/A N/A N/A T<=95 TI_0
|
|
*=============================================================================
|
|
*/
|
|
static void iwl_advance_tt_handler(struct iwl_priv *priv, s32 temp, bool force)
|
|
{
|
|
struct iwl_tt_mgmt *tt = &priv->thermal_throttle;
|
|
int i;
|
|
bool changed = false;
|
|
enum iwl_tt_state old_state;
|
|
struct iwl_tt_trans *transaction;
|
|
|
|
old_state = tt->state;
|
|
for (i = 0; i < IWL_TI_STATE_MAX - 1; i++) {
|
|
/* based on the current TT state,
|
|
* find the curresponding transaction table
|
|
* each table has (IWL_TI_STATE_MAX - 1) entries
|
|
* tt->transaction + ((old_state * (IWL_TI_STATE_MAX - 1))
|
|
* will advance to the correct table.
|
|
* then based on the current temperature
|
|
* find the next state need to transaction to
|
|
* go through all the possible (IWL_TI_STATE_MAX - 1) entries
|
|
* in the current table to see if transaction is needed
|
|
*/
|
|
transaction = tt->transaction +
|
|
((old_state * (IWL_TI_STATE_MAX - 1)) + i);
|
|
if (temp >= transaction->tt_low &&
|
|
temp <= transaction->tt_high) {
|
|
#ifdef CONFIG_IWLWIFI_DEBUG
|
|
if ((tt->tt_previous_temp) &&
|
|
(temp > tt->tt_previous_temp) &&
|
|
((temp - tt->tt_previous_temp) >
|
|
IWL_TT_INCREASE_MARGIN)) {
|
|
IWL_DEBUG_POWER(priv,
|
|
"Temperature increase %d "
|
|
"degree Celsius\n",
|
|
(temp - tt->tt_previous_temp));
|
|
}
|
|
tt->tt_previous_temp = temp;
|
|
#endif
|
|
if (old_state !=
|
|
transaction->next_state) {
|
|
changed = true;
|
|
tt->state =
|
|
transaction->next_state;
|
|
}
|
|
break;
|
|
}
|
|
}
|
|
/* stop ct_kill_waiting_tm timer */
|
|
del_timer_sync(&priv->thermal_throttle.ct_kill_waiting_tm);
|
|
if (changed) {
|
|
struct iwl_rxon_cmd *rxon = &priv->staging_rxon;
|
|
|
|
if (tt->state >= IWL_TI_1) {
|
|
/* force PI = IWL_POWER_INDEX_5 in the case of TI > 0 */
|
|
tt->tt_power_mode = IWL_POWER_INDEX_5;
|
|
if (!iwl_ht_enabled(priv))
|
|
/* disable HT */
|
|
rxon->flags &= ~(RXON_FLG_CHANNEL_MODE_MSK |
|
|
RXON_FLG_CTRL_CHANNEL_LOC_HI_MSK |
|
|
RXON_FLG_HT40_PROT_MSK |
|
|
RXON_FLG_HT_PROT_MSK);
|
|
else {
|
|
/* check HT capability and set
|
|
* according to the system HT capability
|
|
* in case get disabled before */
|
|
iwl_set_rxon_ht(priv, &priv->current_ht_config);
|
|
}
|
|
|
|
} else {
|
|
/*
|
|
* restore system power setting -- it will be
|
|
* recalculated automatically.
|
|
*/
|
|
|
|
/* check HT capability and set
|
|
* according to the system HT capability
|
|
* in case get disabled before */
|
|
iwl_set_rxon_ht(priv, &priv->current_ht_config);
|
|
}
|
|
mutex_lock(&priv->mutex);
|
|
if (old_state == IWL_TI_CT_KILL)
|
|
clear_bit(STATUS_CT_KILL, &priv->status);
|
|
if (tt->state != IWL_TI_CT_KILL &&
|
|
iwl_power_update_mode(priv, true)) {
|
|
/* TT state not updated
|
|
* try again during next temperature read
|
|
*/
|
|
IWL_ERR(priv, "Cannot update power mode, "
|
|
"TT state not updated\n");
|
|
if (old_state == IWL_TI_CT_KILL)
|
|
set_bit(STATUS_CT_KILL, &priv->status);
|
|
tt->state = old_state;
|
|
} else {
|
|
IWL_DEBUG_POWER(priv,
|
|
"Thermal Throttling to new state: %u\n",
|
|
tt->state);
|
|
if (old_state != IWL_TI_CT_KILL &&
|
|
tt->state == IWL_TI_CT_KILL) {
|
|
if (force) {
|
|
IWL_DEBUG_POWER(priv,
|
|
"Enter IWL_TI_CT_KILL\n");
|
|
set_bit(STATUS_CT_KILL, &priv->status);
|
|
iwl_perform_ct_kill_task(priv, true);
|
|
} else {
|
|
iwl_prepare_ct_kill_task(priv);
|
|
tt->state = old_state;
|
|
}
|
|
} else if (old_state == IWL_TI_CT_KILL &&
|
|
tt->state != IWL_TI_CT_KILL) {
|
|
IWL_DEBUG_POWER(priv, "Exit IWL_TI_CT_KILL\n");
|
|
iwl_perform_ct_kill_task(priv, false);
|
|
}
|
|
}
|
|
mutex_unlock(&priv->mutex);
|
|
}
|
|
}
|
|
|
|
/* Card State Notification indicated reach critical temperature
|
|
* if PSP not enable, no Thermal Throttling function will be performed
|
|
* just set the GP1 bit to acknowledge the event
|
|
* otherwise, go into IWL_TI_CT_KILL state
|
|
* since Card State Notification will not provide any temperature reading
|
|
* for Legacy mode
|
|
* so just pass the CT_KILL temperature to iwl_legacy_tt_handler()
|
|
* for advance mode
|
|
* pass CT_KILL_THRESHOLD+1 to make sure move into IWL_TI_CT_KILL state
|
|
*/
|
|
static void iwl_bg_ct_enter(struct work_struct *work)
|
|
{
|
|
struct iwl_priv *priv = container_of(work, struct iwl_priv, ct_enter);
|
|
struct iwl_tt_mgmt *tt = &priv->thermal_throttle;
|
|
|
|
if (test_bit(STATUS_EXIT_PENDING, &priv->status))
|
|
return;
|
|
|
|
if (!iwl_is_ready(priv))
|
|
return;
|
|
|
|
if (tt->state != IWL_TI_CT_KILL) {
|
|
IWL_ERR(priv, "Device reached critical temperature "
|
|
"- ucode going to sleep!\n");
|
|
if (!priv->thermal_throttle.advanced_tt)
|
|
iwl_legacy_tt_handler(priv,
|
|
IWL_MINIMAL_POWER_THRESHOLD,
|
|
true);
|
|
else
|
|
iwl_advance_tt_handler(priv,
|
|
CT_KILL_THRESHOLD + 1, true);
|
|
}
|
|
}
|
|
|
|
/* Card State Notification indicated out of critical temperature
|
|
* since Card State Notification will not provide any temperature reading
|
|
* so pass the IWL_REDUCED_PERFORMANCE_THRESHOLD_2 temperature
|
|
* to iwl_legacy_tt_handler() to get out of IWL_CT_KILL state
|
|
*/
|
|
static void iwl_bg_ct_exit(struct work_struct *work)
|
|
{
|
|
struct iwl_priv *priv = container_of(work, struct iwl_priv, ct_exit);
|
|
struct iwl_tt_mgmt *tt = &priv->thermal_throttle;
|
|
|
|
if (test_bit(STATUS_EXIT_PENDING, &priv->status))
|
|
return;
|
|
|
|
if (!iwl_is_ready(priv))
|
|
return;
|
|
|
|
/* stop ct_kill_exit_tm timer */
|
|
del_timer_sync(&priv->thermal_throttle.ct_kill_exit_tm);
|
|
|
|
if (tt->state == IWL_TI_CT_KILL) {
|
|
IWL_ERR(priv,
|
|
"Device temperature below critical"
|
|
"- ucode awake!\n");
|
|
/*
|
|
* exit from CT_KILL state
|
|
* reset the current temperature reading
|
|
*/
|
|
priv->temperature = 0;
|
|
if (!priv->thermal_throttle.advanced_tt)
|
|
iwl_legacy_tt_handler(priv,
|
|
IWL_REDUCED_PERFORMANCE_THRESHOLD_2,
|
|
true);
|
|
else
|
|
iwl_advance_tt_handler(priv, CT_KILL_EXIT_THRESHOLD,
|
|
true);
|
|
}
|
|
}
|
|
|
|
void iwl_tt_enter_ct_kill(struct iwl_priv *priv)
|
|
{
|
|
if (test_bit(STATUS_EXIT_PENDING, &priv->status))
|
|
return;
|
|
|
|
IWL_DEBUG_POWER(priv, "Queueing critical temperature enter.\n");
|
|
queue_work(priv->workqueue, &priv->ct_enter);
|
|
}
|
|
EXPORT_SYMBOL(iwl_tt_enter_ct_kill);
|
|
|
|
void iwl_tt_exit_ct_kill(struct iwl_priv *priv)
|
|
{
|
|
if (test_bit(STATUS_EXIT_PENDING, &priv->status))
|
|
return;
|
|
|
|
IWL_DEBUG_POWER(priv, "Queueing critical temperature exit.\n");
|
|
queue_work(priv->workqueue, &priv->ct_exit);
|
|
}
|
|
EXPORT_SYMBOL(iwl_tt_exit_ct_kill);
|
|
|
|
static void iwl_bg_tt_work(struct work_struct *work)
|
|
{
|
|
struct iwl_priv *priv = container_of(work, struct iwl_priv, tt_work);
|
|
s32 temp = priv->temperature; /* degrees CELSIUS except specified */
|
|
|
|
if (test_bit(STATUS_EXIT_PENDING, &priv->status))
|
|
return;
|
|
|
|
if (priv->cfg->temperature_kelvin)
|
|
temp = KELVIN_TO_CELSIUS(priv->temperature);
|
|
|
|
if (!priv->thermal_throttle.advanced_tt)
|
|
iwl_legacy_tt_handler(priv, temp, false);
|
|
else
|
|
iwl_advance_tt_handler(priv, temp, false);
|
|
}
|
|
|
|
void iwl_tt_handler(struct iwl_priv *priv)
|
|
{
|
|
if (test_bit(STATUS_EXIT_PENDING, &priv->status))
|
|
return;
|
|
|
|
IWL_DEBUG_POWER(priv, "Queueing thermal throttling work.\n");
|
|
queue_work(priv->workqueue, &priv->tt_work);
|
|
}
|
|
EXPORT_SYMBOL(iwl_tt_handler);
|
|
|
|
/* Thermal throttling initialization
|
|
* For advance thermal throttling:
|
|
* Initialize Thermal Index and temperature threshold table
|
|
* Initialize thermal throttling restriction table
|
|
*/
|
|
void iwl_tt_initialize(struct iwl_priv *priv)
|
|
{
|
|
struct iwl_tt_mgmt *tt = &priv->thermal_throttle;
|
|
int size = sizeof(struct iwl_tt_trans) * (IWL_TI_STATE_MAX - 1);
|
|
struct iwl_tt_trans *transaction;
|
|
|
|
IWL_DEBUG_POWER(priv, "Initialize Thermal Throttling\n");
|
|
|
|
memset(tt, 0, sizeof(struct iwl_tt_mgmt));
|
|
|
|
tt->state = IWL_TI_0;
|
|
init_timer(&priv->thermal_throttle.ct_kill_exit_tm);
|
|
priv->thermal_throttle.ct_kill_exit_tm.data = (unsigned long)priv;
|
|
priv->thermal_throttle.ct_kill_exit_tm.function =
|
|
iwl_tt_check_exit_ct_kill;
|
|
init_timer(&priv->thermal_throttle.ct_kill_waiting_tm);
|
|
priv->thermal_throttle.ct_kill_waiting_tm.data = (unsigned long)priv;
|
|
priv->thermal_throttle.ct_kill_waiting_tm.function =
|
|
iwl_tt_ready_for_ct_kill;
|
|
/* setup deferred ct kill work */
|
|
INIT_WORK(&priv->tt_work, iwl_bg_tt_work);
|
|
INIT_WORK(&priv->ct_enter, iwl_bg_ct_enter);
|
|
INIT_WORK(&priv->ct_exit, iwl_bg_ct_exit);
|
|
|
|
if (priv->cfg->adv_thermal_throttle) {
|
|
IWL_DEBUG_POWER(priv, "Advanced Thermal Throttling\n");
|
|
tt->restriction = kzalloc(sizeof(struct iwl_tt_restriction) *
|
|
IWL_TI_STATE_MAX, GFP_KERNEL);
|
|
tt->transaction = kzalloc(sizeof(struct iwl_tt_trans) *
|
|
IWL_TI_STATE_MAX * (IWL_TI_STATE_MAX - 1),
|
|
GFP_KERNEL);
|
|
if (!tt->restriction || !tt->transaction) {
|
|
IWL_ERR(priv, "Fallback to Legacy Throttling\n");
|
|
priv->thermal_throttle.advanced_tt = false;
|
|
kfree(tt->restriction);
|
|
tt->restriction = NULL;
|
|
kfree(tt->transaction);
|
|
tt->transaction = NULL;
|
|
} else {
|
|
transaction = tt->transaction +
|
|
(IWL_TI_0 * (IWL_TI_STATE_MAX - 1));
|
|
memcpy(transaction, &tt_range_0[0], size);
|
|
transaction = tt->transaction +
|
|
(IWL_TI_1 * (IWL_TI_STATE_MAX - 1));
|
|
memcpy(transaction, &tt_range_1[0], size);
|
|
transaction = tt->transaction +
|
|
(IWL_TI_2 * (IWL_TI_STATE_MAX - 1));
|
|
memcpy(transaction, &tt_range_2[0], size);
|
|
transaction = tt->transaction +
|
|
(IWL_TI_CT_KILL * (IWL_TI_STATE_MAX - 1));
|
|
memcpy(transaction, &tt_range_3[0], size);
|
|
size = sizeof(struct iwl_tt_restriction) *
|
|
IWL_TI_STATE_MAX;
|
|
memcpy(tt->restriction,
|
|
&restriction_range[0], size);
|
|
priv->thermal_throttle.advanced_tt = true;
|
|
}
|
|
} else {
|
|
IWL_DEBUG_POWER(priv, "Legacy Thermal Throttling\n");
|
|
priv->thermal_throttle.advanced_tt = false;
|
|
}
|
|
}
|
|
EXPORT_SYMBOL(iwl_tt_initialize);
|
|
|
|
/* cleanup thermal throttling management related memory and timer */
|
|
void iwl_tt_exit(struct iwl_priv *priv)
|
|
{
|
|
struct iwl_tt_mgmt *tt = &priv->thermal_throttle;
|
|
|
|
/* stop ct_kill_exit_tm timer if activated */
|
|
del_timer_sync(&priv->thermal_throttle.ct_kill_exit_tm);
|
|
/* stop ct_kill_waiting_tm timer if activated */
|
|
del_timer_sync(&priv->thermal_throttle.ct_kill_waiting_tm);
|
|
cancel_work_sync(&priv->tt_work);
|
|
cancel_work_sync(&priv->ct_enter);
|
|
cancel_work_sync(&priv->ct_exit);
|
|
|
|
if (priv->thermal_throttle.advanced_tt) {
|
|
/* free advance thermal throttling memory */
|
|
kfree(tt->restriction);
|
|
tt->restriction = NULL;
|
|
kfree(tt->transaction);
|
|
tt->transaction = NULL;
|
|
}
|
|
}
|
|
EXPORT_SYMBOL(iwl_tt_exit);
|
|
|
|
/* initialize to default */
|
|
void iwl_power_initialize(struct iwl_priv *priv)
|
|
{
|
|
u16 lctl = iwl_pcie_link_ctl(priv);
|
|
|
|
priv->power_data.pci_pm = !(lctl & PCI_CFG_LINK_CTRL_VAL_L0S_EN);
|
|
|
|
priv->power_data.debug_sleep_level_override = -1;
|
|
|
|
memset(&priv->power_data.sleep_cmd, 0,
|
|
sizeof(priv->power_data.sleep_cmd));
|
|
}
|
|
EXPORT_SYMBOL(iwl_power_initialize);
|