iwlwifi: mvm: use the firmware to get the temperature during CT kill

Reading the temperature directly from the hardware, without the help
of the firmware, is a complex process and is not entirely the same for
different hardware.  Also, some NICs don't easily allow access to the
sensors when the firmware is not running, which would add even more
complexity to the code.

To reduce the code complexity and to avoid code duplication between
the firmware and the driver, boot the firmware briefly to read the
current temperature while in CT kill mode.

Signed-off-by: Luciano Coelho <luciano.coelho@intel.com>
Reviewed-by: Johannes Berg <johannes.berg@intel.com>
Signed-off-by: Emmanuel Grumbach <emmanuel.grumbach@intel.com>

1 files changed, 32 insertions, 0 deletions

diff --git a/drivers/net/wireless/iwlwifi/mvm/fw-api.h b/drivers/net/wireless/iwlwifi/mvm/fw-api.h
index b599b5288982..fbcc036b1e44 100644
--- a/drivers/net/wireless/iwlwifi/mvm/fw-api.h
+++ b/drivers/net/wireless/iwlwifi/mvm/fw-api.h
@@ -205,6 +205,10 @@ enum {
         REPLY_SF_CFG_CMD = 0xd1,
         REPLY_BEACON_FILTERING_CMD = 0xd2,
 
+        /* DTS measurements */
+        CMD_DTS_MEASUREMENT_TRIGGER = 0xdc,
+        DTS_MEASUREMENT_NOTIFICATION = 0xdd,
+
         REPLY_DEBUG_CMD = 0xf0,
         DEBUG_LOG_MSG = 0xf7,
 
@@ -1618,4 +1622,32 @@ struct iwl_sf_cfg_cmd {
         __le32 full_on_timeouts[SF_NUM_SCENARIO][SF_NUM_TIMEOUT_TYPES];
 } __packed; /* SF_CFG_API_S_VER_2 */
 
+/* DTS measurements */
+
+enum iwl_dts_measurement_flags {
+        DTS_TRIGGER_CMD_FLAGS_TEMP      = BIT(0),
+        DTS_TRIGGER_CMD_FLAGS_VOLT      = BIT(1),
+};
+
+/**
+ * iwl_dts_measurement_cmd - request DTS temperature and/or voltage measurements
+ *
+ * @flags: indicates which measurements we want as specified in &enum
+ *         iwl_dts_measurement_flags
+ */
+struct iwl_dts_measurement_cmd {
+        __le32 flags;
+} __packed; /* TEMPERATURE_MEASUREMENT_TRIGGER_CMD_S */
+
+/**
+ * iwl_dts_measurement_notif - notification received with the measurements
+ *
+ * @temp: the measured temperature
+ * @voltage: the measured voltage
+ */
+struct iwl_dts_measurement_notif {
+        __le32 temp;
+        __le32 voltage;
+} __packed; /* TEMPERATURE_MEASUREMENT_TRIGGER_NTFY_S */
+
 #endif /* __fw_api_h__ */