1 files changed, 90 insertions, 0 deletions
diff --git a/drivers/net/ethernet/chelsio/cxgb4/cxgb4_thermal.c b/drivers/net/ethernet/chelsio/cxgb4/cxgb4_thermal.c
new file mode 100644
index 0000000000..dea9d29076
--- /dev/null
+++ b/drivers/net/ethernet/chelsio/cxgb4/cxgb4_thermal.c
@@ -0,0 +1,90 @@
+// SPDX-License-Identifier: GPL-2.0-only
+/*
+ *  Copyright (C) 2017 Chelsio Communications.  All rights reserved.
+ *
+ *  Written by: Ganesh Goudar (ganeshgr@chelsio.com)
+ */
+
+#include "cxgb4.h"
+
+#define CXGB4_NUM_TRIPS 1
+
+static int cxgb4_thermal_get_temp(struct thermal_zone_device *tzdev,
+				  int *temp)
+{
+	struct adapter *adap = thermal_zone_device_priv(tzdev);
+	u32 param, val;
+	int ret;
+
+	param = (FW_PARAMS_MNEM_V(FW_PARAMS_MNEM_DEV) |
+		 FW_PARAMS_PARAM_X_V(FW_PARAMS_PARAM_DEV_DIAG) |
+		 FW_PARAMS_PARAM_Y_V(FW_PARAM_DEV_DIAG_TMP));
+
+	ret = t4_query_params(adap, adap->mbox, adap->pf, 0, 1,
+			      &param, &val);
+	if (ret < 0 || val == 0)
+		return -1;
+
+	*temp = val * 1000;
+	return 0;
+}
+
+static struct thermal_zone_device_ops cxgb4_thermal_ops = {
+	.get_temp = cxgb4_thermal_get_temp,
+};
+
+static struct thermal_trip trip = { .type = THERMAL_TRIP_CRITICAL } ;
+
+int cxgb4_thermal_init(struct adapter *adap)
+{
+	struct ch_thermal *ch_thermal = &adap->ch_thermal;
+	char ch_tz_name[THERMAL_NAME_LENGTH];
+	int num_trip = CXGB4_NUM_TRIPS;
+	u32 param, val;
+	int ret;
+
+	/* on older firmwares we may not get the trip temperature,
+	 * set the num of trips to 0.
+	 */
+	param = (FW_PARAMS_MNEM_V(FW_PARAMS_MNEM_DEV) |
+		 FW_PARAMS_PARAM_X_V(FW_PARAMS_PARAM_DEV_DIAG) |
+		 FW_PARAMS_PARAM_Y_V(FW_PARAM_DEV_DIAG_MAXTMPTHRESH));
+
+	ret = t4_query_params(adap, adap->mbox, adap->pf, 0, 1,
+			      &param, &val);
+	if (ret < 0) {
+		num_trip = 0; /* could not get trip temperature */
+	} else {
+		trip.temperature = val * 1000;
+	}
+
+	snprintf(ch_tz_name, sizeof(ch_tz_name), "cxgb4_%s", adap->name);
+	ch_thermal->tzdev = thermal_zone_device_register_with_trips(ch_tz_name, &trip, num_trip,
+								    0, adap,
+								    &cxgb4_thermal_ops,
+								    NULL, 0, 0);
+	if (IS_ERR(ch_thermal->tzdev)) {
+		ret = PTR_ERR(ch_thermal->tzdev);
+		dev_err(adap->pdev_dev, "Failed to register thermal zone\n");
+		ch_thermal->tzdev = NULL;
+		return ret;
+	}
+
+	ret = thermal_zone_device_enable(ch_thermal->tzdev);
+	if (ret) {
+		dev_err(adap->pdev_dev, "Failed to enable thermal zone\n");
+		thermal_zone_device_unregister(adap->ch_thermal.tzdev);
+		return ret;
+	}
+
+	return 0;
+}
+
+int cxgb4_thermal_remove(struct adapter *adap)
+{
+	if (adap->ch_thermal.tzdev) {
+		thermal_zone_device_unregister(adap->ch_thermal.tzdev);
+		adap->ch_thermal.tzdev = NULL;
+	}
+	return 0;
+}