diff options
Diffstat (limited to 'drivers/net/wireless/iwlwifi/mvm/tt.c')
| -rw-r--r-- | drivers/net/wireless/iwlwifi/mvm/tt.c | 326 |
1 files changed, 79 insertions, 247 deletions
diff --git a/drivers/net/wireless/iwlwifi/mvm/tt.c b/drivers/net/wireless/iwlwifi/mvm/tt.c index c3e1fe4282f1..c750ca7b8269 100644 --- a/drivers/net/wireless/iwlwifi/mvm/tt.c +++ b/drivers/net/wireless/iwlwifi/mvm/tt.c @@ -69,275 +69,99 @@ #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 IWL_MVM_TEMP_NOTIF_WAIT_TIMEOUT HZ -#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) +static void iwl_mvm_enter_ctkill(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; + u32 duration = mvm->thermal_throttle.params->ct_kill_duration; - vbg = le16_to_cpu(calib[OTP_WP_DTS_VBG]); + if (test_bit(IWL_MVM_STATUS_HW_CTKILL, &mvm->status)) + return; - if (vbg < MEAS_VBG_MIN_VAL || vbg > MEAS_VBG_MAX_VAL) - vbg = MEAS_VBG_DEFAULT_VAL; + IWL_ERR(mvm, "Enter CT Kill\n"); + iwl_mvm_set_hw_ctkill_state(mvm, true); - return vbg; + /* Don't schedule an exit work if we're in test mode, since + * the temperature will not change unless we manually set it + * again (or disable testing). + */ + if (!mvm->temperature_test) + schedule_delayed_work(&mvm->thermal_throttle.ct_kill_exit, + round_jiffies_relative(duration * HZ)); } -static u16 iwl_mvm_dts_get_ptat_deviation_offset(struct iwl_mvm *mvm) +static void iwl_mvm_exit_ctkill(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 * 2]; - pa1 = calib[OTP_DTS_DIODE_DEVIATION * 2 + 1]; - pa2 = calib[OTP_DTS_DIODE_DEVIATION * 2 + 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; - } + if (!test_bit(IWL_MVM_STATUS_HW_CTKILL, &mvm->status)) + return; - return ptat - median; + IWL_ERR(mvm, "Exit CT Kill\n"); + iwl_mvm_set_hw_ctkill_state(mvm, false); } -static u8 iwl_mvm_dts_calibrate_ptat_deviation(struct iwl_mvm *mvm, u8 value) +static bool iwl_mvm_temp_notif(struct iwl_notif_wait_data *notif_wait, + struct iwl_rx_packet *pkt, void *data) { - /* Calibrate the PTAT digital value, based on PTAT deviation data: */ - s16 new_val = value - iwl_mvm_dts_get_ptat_deviation_offset(mvm); + struct iwl_mvm *mvm = + container_of(notif_wait, struct iwl_mvm, notif_wait); + int *temp = data; + struct iwl_dts_measurement_notif *notif; + int len = iwl_rx_packet_payload_len(pkt); + + if (WARN_ON_ONCE(len != sizeof(*notif))) { + IWL_ERR(mvm, "Invalid DTS_MEASUREMENT_NOTIFICATION\n"); + return true; + } - 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; + notif = (void *)pkt->data; - return new_val; -} + *temp = le32_to_cpu(notif->temp); -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; -} + /* shouldn't be negative, but since it's s32, make sure it isn't */ + if (WARN_ON_ONCE(*temp < 0)) + *temp = 0; -/* - * 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); + IWL_DEBUG_TEMP(mvm, "DTS_MEASUREMENT_NOTIFICATION - %d\n", *temp); + return true; } -static s32 calculate_nic_temperature(union dts_diode_results avg_ptat, - u16 volt_band_gap) +static int iwl_mvm_get_temp_cmd(struct iwl_mvm *mvm) { - 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, + struct iwl_dts_measurement_cmd cmd = { + .flags = cpu_to_le32(DTS_TRIGGER_CMD_FLAGS_TEMP), }; - /* - * 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); + return iwl_mvm_send_cmd_pdu(mvm, CMD_DTS_MEASUREMENT_TRIGGER, 0, + sizeof(cmd), &cmd); } -static void iwl_mvm_enter_ctkill(struct iwl_mvm *mvm) +static int iwl_mvm_get_temp(struct iwl_mvm *mvm) { - u32 duration = mvm->thermal_throttle.params->ct_kill_duration; + struct iwl_notification_wait wait_temp_notif; + static const u8 temp_notif[] = { DTS_MEASUREMENT_NOTIFICATION }; + int ret, temp; - if (test_bit(IWL_MVM_STATUS_HW_CTKILL, &mvm->status)) - return; + lockdep_assert_held(&mvm->mutex); - IWL_ERR(mvm, "Enter CT Kill\n"); - iwl_mvm_set_hw_ctkill_state(mvm, true); + iwl_init_notification_wait(&mvm->notif_wait, &wait_temp_notif, + temp_notif, ARRAY_SIZE(temp_notif), + iwl_mvm_temp_notif, &temp); - /* Don't schedule an exit work if we're in test mode, since - * the temperature will not change unless we manually set it - * again (or disable testing). - */ - if (!mvm->temperature_test) - schedule_delayed_work(&mvm->thermal_throttle.ct_kill_exit, - round_jiffies_relative(duration * HZ)); -} + ret = iwl_mvm_get_temp_cmd(mvm); + if (ret) { + IWL_ERR(mvm, "Failed to get the temperature (err=%d)\n", ret); + iwl_remove_notification(&mvm->notif_wait, &wait_temp_notif); + return ret; + } -static void iwl_mvm_exit_ctkill(struct iwl_mvm *mvm) -{ - if (!test_bit(IWL_MVM_STATUS_HW_CTKILL, &mvm->status)) - return; + ret = iwl_wait_notification(&mvm->notif_wait, &wait_temp_notif, + IWL_MVM_TEMP_NOTIF_WAIT_TIMEOUT); + if (ret) { + IWL_ERR(mvm, "Getting the temperature timed out\n"); + return ret; + } - IWL_ERR(mvm, "Exit CT Kill\n"); - iwl_mvm_set_hw_ctkill_state(mvm, false); + return temp; } static void check_exit_ctkill(struct work_struct *work) @@ -352,28 +176,36 @@ static void check_exit_ctkill(struct work_struct *work) duration = tt->params->ct_kill_duration; + mutex_lock(&mvm->mutex); + + if (__iwl_mvm_mac_start(mvm)) + goto reschedule; + /* make sure the device is available for direct read/writes */ - if (iwl_mvm_ref_sync(mvm, IWL_MVM_REF_CHECK_CTKILL)) + if (iwl_mvm_ref_sync(mvm, IWL_MVM_REF_CHECK_CTKILL)) { + __iwl_mvm_mac_stop(mvm); goto reschedule; + } - iwl_trans_start_hw(mvm->trans); - temp = check_nic_temperature(mvm); - iwl_trans_stop_device(mvm->trans); + temp = iwl_mvm_get_temp(mvm); iwl_mvm_unref(mvm, IWL_MVM_REF_CHECK_CTKILL); - if (temp < MIN_TEMPERATURE || temp > MAX_TEMPERATURE) { - IWL_DEBUG_TEMP(mvm, "Failed to measure NIC temperature\n"); + __iwl_mvm_mac_stop(mvm); + + if (temp < 0) goto reschedule; - } + IWL_DEBUG_TEMP(mvm, "NIC temperature: %d\n", temp); if (temp <= tt->params->ct_kill_exit) { + mutex_unlock(&mvm->mutex); iwl_mvm_exit_ctkill(mvm); return; } reschedule: + mutex_unlock(&mvm->mutex); schedule_delayed_work(&mvm->thermal_throttle.ct_kill_exit, round_jiffies(duration * HZ)); } |