#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)
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));
}
projects / mirror_ubuntu-jammy-kernel.git / commitdiff