diff options
Diffstat (limited to 'drivers/net/wireless/iwlwifi/mvm/tt.c')
| -rw-r--r-- | drivers/net/wireless/iwlwifi/mvm/tt.c | 530 |
1 files changed, 0 insertions, 530 deletions
diff --git a/drivers/net/wireless/iwlwifi/mvm/tt.c b/drivers/net/wireless/iwlwifi/mvm/tt.c deleted file mode 100644 index d6ae7f16ac11..000000000000 --- a/drivers/net/wireless/iwlwifi/mvm/tt.c +++ /dev/null @@ -1,530 +0,0 @@ -/****************************************************************************** - * - * This file is provided under a dual BSD/GPLv2 license. When using or - * redistributing this file, you may do so under either license. - * - * GPL LICENSE SUMMARY - * - * Copyright(c) 2013 Intel Corporation. All rights reserved. - * - * 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 COPYING. - * - * Contact Information: - * Intel Linux Wireless <ilw@linux.intel.com> - * Intel Corporation, 5200 N.E. Elam Young Parkway, Hillsboro, OR 97124-6497 - * - * BSD LICENSE - * - * Copyright(c) 2012 - 2013 Intel Corporation. All rights reserved. - * All rights reserved. - * - * Redistribution and use in source and binary forms, with or without - * modification, are permitted provided that the following conditions - * are met: - * - * * Redistributions of source code must retain the above copyright - * notice, this list of conditions and the following disclaimer. - * * Redistributions in binary form must reproduce the above copyright - * notice, this list of conditions and the following disclaimer in - * the documentation and/or other materials provided with the - * distribution. - * * Neither the name Intel Corporation nor the names of its - * contributors may be used to endorse or promote products derived - * from this software without specific prior written permission. - * - * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS - * "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT - * LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR - * A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT - * OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, - * SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT - * LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, - * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY - * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT - * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE - * OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. - * - *****************************************************************************/ - -#include "mvm.h" -#include "iwl-config.h" -#include "iwl-io.h" -#include "iwl-csr.h" -#include "iwl-prph.h" - -#define OTP_DTS_DIODE_DEVIATION 96 /*in words*/ -/* VBG - Voltage Band Gap error data (temperature offset) */ -#define OTP_WP_DTS_VBG (OTP_DTS_DIODE_DEVIATION + 2) -#define MEAS_VBG_MIN_VAL 2300 -#define MEAS_VBG_MAX_VAL 3000 -#define MEAS_VBG_DEFAULT_VAL 2700 -#define DTS_DIODE_VALID(flags) (flags & DTS_DIODE_REG_FLAGS_PASS_ONCE) -#define MIN_TEMPERATURE 0 -#define MAX_TEMPERATURE 125 -#define TEMPERATURE_ERROR (MAX_TEMPERATURE + 1) -#define PTAT_DIGITAL_VALUE_MIN_VALUE 0 -#define PTAT_DIGITAL_VALUE_MAX_VALUE 0xFF -#define DTS_VREFS_NUM 5 -static inline u32 DTS_DIODE_GET_VREFS_ID(u32 flags) -{ - return (flags & DTS_DIODE_REG_FLAGS_VREFS_ID) >> - DTS_DIODE_REG_FLAGS_VREFS_ID_POS; -} - -#define CALC_VREFS_MIN_DIFF 43 -#define CALC_VREFS_MAX_DIFF 51 -#define CALC_LUT_SIZE (1 + CALC_VREFS_MAX_DIFF - CALC_VREFS_MIN_DIFF) -#define CALC_LUT_INDEX_OFFSET CALC_VREFS_MIN_DIFF -#define CALC_TEMPERATURE_RESULT_SHIFT_OFFSET 23 - -/* - * @digital_value: The diode's digital-value sampled (temperature/voltage) - * @vref_low: The lower voltage-reference (the vref just below the diode's - * sampled digital-value) - * @vref_high: The higher voltage-reference (the vref just above the diode's - * sampled digital-value) - * @flags: bits[1:0]: The ID of the Vrefs pair (lowVref,highVref) - * bits[6:2]: Reserved. - * bits[7:7]: Indicates completion of at least 1 successful sample - * since last DTS reset. - */ -struct iwl_mvm_dts_diode_bits { - u8 digital_value; - u8 vref_low; - u8 vref_high; - u8 flags; -} __packed; - -union dts_diode_results { - u32 reg_value; - struct iwl_mvm_dts_diode_bits bits; -} __packed; - -static s16 iwl_mvm_dts_get_volt_band_gap(struct iwl_mvm *mvm) -{ - struct iwl_nvm_section calib_sec; - const __le16 *calib; - u16 vbg; - - /* TODO: move parsing to NVM code */ - calib_sec = mvm->nvm_sections[NVM_SECTION_TYPE_CALIBRATION]; - calib = (__le16 *)calib_sec.data; - - vbg = le16_to_cpu(calib[OTP_WP_DTS_VBG]); - - if (vbg < MEAS_VBG_MIN_VAL || vbg > MEAS_VBG_MAX_VAL) - vbg = MEAS_VBG_DEFAULT_VAL; - - return vbg; -} - -static u16 iwl_mvm_dts_get_ptat_deviation_offset(struct iwl_mvm *mvm) -{ - const u8 *calib; - u8 ptat, pa1, pa2, median; - - /* TODO: move parsing to NVM code */ - calib = mvm->nvm_sections[NVM_SECTION_TYPE_CALIBRATION].data; - ptat = calib[OTP_DTS_DIODE_DEVIATION]; - pa1 = calib[OTP_DTS_DIODE_DEVIATION + 1]; - pa2 = calib[OTP_DTS_DIODE_DEVIATION + 2]; - - /* get the median: */ - if (ptat > pa1) { - if (ptat > pa2) - median = (pa1 > pa2) ? pa1 : pa2; - else - median = ptat; - } else { - if (pa1 > pa2) - median = (ptat > pa2) ? ptat : pa2; - else - median = pa1; - } - - return ptat - median; -} - -static u8 iwl_mvm_dts_calibrate_ptat_deviation(struct iwl_mvm *mvm, u8 value) -{ - /* Calibrate the PTAT digital value, based on PTAT deviation data: */ - s16 new_val = value - iwl_mvm_dts_get_ptat_deviation_offset(mvm); - - if (new_val > PTAT_DIGITAL_VALUE_MAX_VALUE) - new_val = PTAT_DIGITAL_VALUE_MAX_VALUE; - else if (new_val < PTAT_DIGITAL_VALUE_MIN_VALUE) - new_val = PTAT_DIGITAL_VALUE_MIN_VALUE; - - return new_val; -} - -static bool dts_get_adjacent_vrefs(struct iwl_mvm *mvm, - union dts_diode_results *avg_ptat) -{ - u8 vrefs_results[DTS_VREFS_NUM]; - u8 low_vref_index = 0, flags; - u32 reg; - - reg = iwl_read_prph(mvm->trans, DTSC_VREF_AVG); - memcpy(vrefs_results, ®, sizeof(reg)); - reg = iwl_read_prph(mvm->trans, DTSC_VREF5_AVG); - vrefs_results[4] = reg & 0xff; - - if (avg_ptat->bits.digital_value < vrefs_results[0] || - avg_ptat->bits.digital_value > vrefs_results[4]) - return false; - - if (avg_ptat->bits.digital_value > vrefs_results[3]) - low_vref_index = 3; - else if (avg_ptat->bits.digital_value > vrefs_results[2]) - low_vref_index = 2; - else if (avg_ptat->bits.digital_value > vrefs_results[1]) - low_vref_index = 1; - - avg_ptat->bits.vref_low = vrefs_results[low_vref_index]; - avg_ptat->bits.vref_high = vrefs_results[low_vref_index + 1]; - flags = avg_ptat->bits.flags; - avg_ptat->bits.flags = - (flags & ~DTS_DIODE_REG_FLAGS_VREFS_ID) | - (low_vref_index & DTS_DIODE_REG_FLAGS_VREFS_ID); - return true; -} - -/* - * return true it the results are valid, and false otherwise. - */ -static bool dts_read_ptat_avg_results(struct iwl_mvm *mvm, - union dts_diode_results *avg_ptat) -{ - u32 reg; - u8 tmp; - - /* fill the diode value and pass_once with avg-reg results */ - reg = iwl_read_prph(mvm->trans, DTSC_PTAT_AVG); - reg &= DTS_DIODE_REG_DIG_VAL | DTS_DIODE_REG_PASS_ONCE; - avg_ptat->reg_value = reg; - - /* calibrate the PTAT digital value */ - tmp = avg_ptat->bits.digital_value; - tmp = iwl_mvm_dts_calibrate_ptat_deviation(mvm, tmp); - avg_ptat->bits.digital_value = tmp; - - /* - * fill vrefs fields, based on the avgVrefs results - * and the diode value - */ - return dts_get_adjacent_vrefs(mvm, avg_ptat) && - DTS_DIODE_VALID(avg_ptat->bits.flags); -} - -static s32 calculate_nic_temperature(union dts_diode_results avg_ptat, - u16 volt_band_gap) -{ - u32 tmp_result; - u8 vrefs_diff; - /* - * For temperature calculation (at the end, shift right by 23) - * LUT[(D2-D1)] = ROUND{ 2^23 / ((D2-D1)*9*10) } - * (D2-D1) == 43 44 45 46 47 48 49 50 51 - */ - static const u16 calc_lut[CALC_LUT_SIZE] = { - 2168, 2118, 2071, 2026, 1983, 1942, 1902, 1864, 1828, - }; - - /* - * The diff between the high and low voltage-references is assumed - * to be strictly be in range of [60,68] - */ - vrefs_diff = avg_ptat.bits.vref_high - avg_ptat.bits.vref_low; - - if (vrefs_diff < CALC_VREFS_MIN_DIFF || - vrefs_diff > CALC_VREFS_MAX_DIFF) - return TEMPERATURE_ERROR; - - /* calculate the result: */ - tmp_result = - vrefs_diff * (DTS_DIODE_GET_VREFS_ID(avg_ptat.bits.flags) + 9); - tmp_result += avg_ptat.bits.digital_value; - tmp_result -= avg_ptat.bits.vref_high; - - /* multiply by the LUT value (based on the diff) */ - tmp_result *= calc_lut[vrefs_diff - CALC_LUT_INDEX_OFFSET]; - - /* - * Get the BandGap (the voltage refereces source) error data - * (temperature offset) - */ - tmp_result *= volt_band_gap; - - /* - * here, tmp_result value can be up to 32-bits. We want to right-shift - * it *without* sign-extend. - */ - tmp_result = tmp_result >> CALC_TEMPERATURE_RESULT_SHIFT_OFFSET; - - /* - * at this point, tmp_result should be in the range: - * 200 <= tmp_result <= 365 - */ - return (s16)tmp_result - 240; -} - -static s32 check_nic_temperature(struct iwl_mvm *mvm) -{ - u16 volt_band_gap; - union dts_diode_results avg_ptat; - - volt_band_gap = iwl_mvm_dts_get_volt_band_gap(mvm); - - /* disable DTS */ - iwl_write_prph(mvm->trans, SHR_MISC_WFM_DTS_EN, 0); - - /* SV initialization */ - iwl_write_prph(mvm->trans, SHR_MISC_WFM_DTS_EN, 1); - iwl_write_prph(mvm->trans, DTSC_CFG_MODE, - DTSC_CFG_MODE_PERIODIC); - - /* wait for results */ - msleep(100); - if (!dts_read_ptat_avg_results(mvm, &avg_ptat)) - return TEMPERATURE_ERROR; - - /* disable DTS */ - iwl_write_prph(mvm->trans, SHR_MISC_WFM_DTS_EN, 0); - - return calculate_nic_temperature(avg_ptat, volt_band_gap); -} - -static void iwl_mvm_enter_ctkill(struct iwl_mvm *mvm) -{ - u32 duration = mvm->thermal_throttle.params->ct_kill_duration; - - IWL_ERR(mvm, "Enter CT Kill\n"); - iwl_mvm_set_hw_ctkill_state(mvm, true); - schedule_delayed_work(&mvm->thermal_throttle.ct_kill_exit, - round_jiffies_relative(duration * HZ)); -} - -static void iwl_mvm_exit_ctkill(struct iwl_mvm *mvm) -{ - IWL_ERR(mvm, "Exit CT Kill\n"); - iwl_mvm_set_hw_ctkill_state(mvm, false); -} - -static void check_exit_ctkill(struct work_struct *work) -{ - struct iwl_mvm_tt_mgmt *tt; - struct iwl_mvm *mvm; - u32 duration; - s32 temp; - - tt = container_of(work, struct iwl_mvm_tt_mgmt, ct_kill_exit.work); - mvm = container_of(tt, struct iwl_mvm, thermal_throttle); - - duration = tt->params->ct_kill_duration; - - iwl_trans_start_hw(mvm->trans); - temp = check_nic_temperature(mvm); - iwl_trans_stop_hw(mvm->trans, false); - - if (temp < MIN_TEMPERATURE || temp > MAX_TEMPERATURE) { - IWL_DEBUG_TEMP(mvm, "Failed to measure NIC temperature\n"); - goto reschedule; - } - IWL_DEBUG_TEMP(mvm, "NIC temperature: %d\n", temp); - - if (temp <= tt->params->ct_kill_exit) { - iwl_mvm_exit_ctkill(mvm); - return; - } - -reschedule: - schedule_delayed_work(&mvm->thermal_throttle.ct_kill_exit, - round_jiffies(duration * HZ)); -} - -static void iwl_mvm_tt_smps_iterator(void *_data, u8 *mac, - struct ieee80211_vif *vif) -{ - struct iwl_mvm *mvm = _data; - enum ieee80211_smps_mode smps_mode; - - lockdep_assert_held(&mvm->mutex); - - if (mvm->thermal_throttle.dynamic_smps) - smps_mode = IEEE80211_SMPS_DYNAMIC; - else - smps_mode = IEEE80211_SMPS_AUTOMATIC; - - if (vif->type != NL80211_IFTYPE_STATION) - return; - - iwl_mvm_update_smps(mvm, vif, IWL_MVM_SMPS_REQ_TT, smps_mode); -} - -static void iwl_mvm_tt_tx_protection(struct iwl_mvm *mvm, bool enable) -{ - struct ieee80211_sta *sta; - struct iwl_mvm_sta *mvmsta; - int i, err; - - for (i = 0; i < IWL_MVM_STATION_COUNT; i++) { - sta = rcu_dereference_protected(mvm->fw_id_to_mac_id[i], - lockdep_is_held(&mvm->mutex)); - if (IS_ERR_OR_NULL(sta)) - continue; - mvmsta = (void *)sta->drv_priv; - if (enable == mvmsta->tt_tx_protection) - continue; - err = iwl_mvm_tx_protection(mvm, &mvmsta->lq_sta.lq, - mvmsta, enable); - if (err) { - IWL_ERR(mvm, "Failed to %s Tx protection\n", - enable ? "enable" : "disable"); - } else { - IWL_DEBUG_TEMP(mvm, "%s Tx protection\n", - enable ? "Enable" : "Disable"); - mvmsta->tt_tx_protection = enable; - } - } -} - -static void iwl_mvm_tt_tx_backoff(struct iwl_mvm *mvm, u32 backoff) -{ - struct iwl_host_cmd cmd = { - .id = REPLY_THERMAL_MNG_BACKOFF, - .len = { sizeof(u32), }, - .data = { &backoff, }, - .flags = CMD_SYNC, - }; - - if (iwl_mvm_send_cmd(mvm, &cmd) == 0) { - IWL_DEBUG_TEMP(mvm, "Set Thermal Tx backoff to: %u\n", - backoff); - mvm->thermal_throttle.tx_backoff = backoff; - } else { - IWL_ERR(mvm, "Failed to change Thermal Tx backoff\n"); - } -} - -void iwl_mvm_tt_handler(struct iwl_mvm *mvm) -{ - const struct iwl_tt_params *params = mvm->thermal_throttle.params; - struct iwl_mvm_tt_mgmt *tt = &mvm->thermal_throttle; - s32 temperature = mvm->temperature; - bool throttle_enable = false; - int i; - u32 tx_backoff; - - IWL_DEBUG_TEMP(mvm, "NIC temperature: %d\n", mvm->temperature); - - if (params->support_ct_kill && temperature >= params->ct_kill_entry) { - iwl_mvm_enter_ctkill(mvm); - return; - } - - if (params->support_dynamic_smps) { - if (!tt->dynamic_smps && - temperature >= params->dynamic_smps_entry) { - IWL_DEBUG_TEMP(mvm, "Enable dynamic SMPS\n"); - tt->dynamic_smps = true; - ieee80211_iterate_active_interfaces_atomic( - mvm->hw, IEEE80211_IFACE_ITER_NORMAL, - iwl_mvm_tt_smps_iterator, mvm); - throttle_enable = true; - } else if (tt->dynamic_smps && - temperature <= params->dynamic_smps_exit) { - IWL_DEBUG_TEMP(mvm, "Disable dynamic SMPS\n"); - tt->dynamic_smps = false; - ieee80211_iterate_active_interfaces_atomic( - mvm->hw, IEEE80211_IFACE_ITER_NORMAL, - iwl_mvm_tt_smps_iterator, mvm); - } - } - - if (params->support_tx_protection) { - if (temperature >= params->tx_protection_entry) { - iwl_mvm_tt_tx_protection(mvm, true); - throttle_enable = true; - } else if (temperature <= params->tx_protection_exit) { - iwl_mvm_tt_tx_protection(mvm, false); - } - } - - if (params->support_tx_backoff) { - tx_backoff = 0; - for (i = 0; i < TT_TX_BACKOFF_SIZE; i++) { - if (temperature < params->tx_backoff[i].temperature) - break; - tx_backoff = params->tx_backoff[i].backoff; - } - if (tx_backoff != 0) - throttle_enable = true; - if (tt->tx_backoff != tx_backoff) - iwl_mvm_tt_tx_backoff(mvm, tx_backoff); - } - - if (!tt->throttle && throttle_enable) { - IWL_WARN(mvm, - "Due to high temperature thermal throttling initiated\n"); - tt->throttle = true; - } else if (tt->throttle && !tt->dynamic_smps && tt->tx_backoff == 0 && - temperature <= params->tx_protection_exit) { - IWL_WARN(mvm, - "Temperature is back to normal thermal throttling stopped\n"); - tt->throttle = false; - } -} - -static const struct iwl_tt_params iwl7000_tt_params = { - .ct_kill_entry = 118, - .ct_kill_exit = 96, - .ct_kill_duration = 5, - .dynamic_smps_entry = 114, - .dynamic_smps_exit = 110, - .tx_protection_entry = 114, - .tx_protection_exit = 108, - .tx_backoff = { - {.temperature = 112, .backoff = 200}, - {.temperature = 113, .backoff = 600}, - {.temperature = 114, .backoff = 1200}, - {.temperature = 115, .backoff = 2000}, - {.temperature = 116, .backoff = 4000}, - {.temperature = 117, .backoff = 10000}, - }, - .support_ct_kill = true, - .support_dynamic_smps = true, - .support_tx_protection = true, - .support_tx_backoff = true, -}; - -void iwl_mvm_tt_initialize(struct iwl_mvm *mvm) -{ - struct iwl_mvm_tt_mgmt *tt = &mvm->thermal_throttle; - - IWL_DEBUG_TEMP(mvm, "Initialize Thermal Throttling\n"); - tt->params = &iwl7000_tt_params; - tt->throttle = false; - INIT_DELAYED_WORK(&tt->ct_kill_exit, check_exit_ctkill); -} - -void iwl_mvm_tt_exit(struct iwl_mvm *mvm) -{ - cancel_delayed_work_sync(&mvm->thermal_throttle.ct_kill_exit); - IWL_DEBUG_TEMP(mvm, "Exit Thermal Throttling\n"); -} |