Adding upstream version 4.19.249.upstream/4.19.249

Signed-off-by: Daniel Baumann <daniel.baumann@progress-linux.org>

1 files changed, 229 insertions, 0 deletions

diff --git a/drivers/net/ethernet/intel/igb/igb_hwmon.c b/drivers/net/ethernet/intel/igb/igb_hwmon.c
new file mode 100644
index 000000000..3b83747b2
--- /dev/null
+++ b/drivers/net/ethernet/intel/igb/igb_hwmon.c
@@ -0,0 +1,229 @@
+// SPDX-License-Identifier: GPL-2.0
+/* Copyright(c) 2007 - 2018 Intel Corporation. */
+
+#include "igb.h"
+#include "e1000_82575.h"
+#include "e1000_hw.h"
+
+#include <linux/module.h>
+#include <linux/types.h>
+#include <linux/sysfs.h>
+#include <linux/kobject.h>
+#include <linux/device.h>
+#include <linux/netdevice.h>
+#include <linux/hwmon.h>
+#include <linux/pci.h>
+
+#ifdef CONFIG_IGB_HWMON
+static struct i2c_board_info i350_sensor_info = {
+	I2C_BOARD_INFO("i350bb", (0Xf8 >> 1)),
+};
+
+/* hwmon callback functions */
+static ssize_t igb_hwmon_show_location(struct device *dev,
+				       struct device_attribute *attr,
+				       char *buf)
+{
+	struct hwmon_attr *igb_attr = container_of(attr, struct hwmon_attr,
+						   dev_attr);
+	return sprintf(buf, "loc%u\n",
+		       igb_attr->sensor->location);
+}
+
+static ssize_t igb_hwmon_show_temp(struct device *dev,
+				   struct device_attribute *attr,
+				   char *buf)
+{
+	struct hwmon_attr *igb_attr = container_of(attr, struct hwmon_attr,
+						   dev_attr);
+	unsigned int value;
+
+	/* reset the temp field */
+	igb_attr->hw->mac.ops.get_thermal_sensor_data(igb_attr->hw);
+
+	value = igb_attr->sensor->temp;
+
+	/* display millidegree */
+	value *= 1000;
+
+	return sprintf(buf, "%u\n", value);
+}
+
+static ssize_t igb_hwmon_show_cautionthresh(struct device *dev,
+					    struct device_attribute *attr,
+					    char *buf)
+{
+	struct hwmon_attr *igb_attr = container_of(attr, struct hwmon_attr,
+						   dev_attr);
+	unsigned int value = igb_attr->sensor->caution_thresh;
+
+	/* display millidegree */
+	value *= 1000;
+
+	return sprintf(buf, "%u\n", value);
+}
+
+static ssize_t igb_hwmon_show_maxopthresh(struct device *dev,
+					  struct device_attribute *attr,
+					  char *buf)
+{
+	struct hwmon_attr *igb_attr = container_of(attr, struct hwmon_attr,
+						   dev_attr);
+	unsigned int value = igb_attr->sensor->max_op_thresh;
+
+	/* display millidegree */
+	value *= 1000;
+
+	return sprintf(buf, "%u\n", value);
+}
+
+/* igb_add_hwmon_attr - Create hwmon attr table for a hwmon sysfs file.
+ * @ adapter: pointer to the adapter structure
+ * @ offset: offset in the eeprom sensor data table
+ * @ type: type of sensor data to display
+ *
+ * For each file we want in hwmon's sysfs interface we need a device_attribute
+ * This is included in our hwmon_attr struct that contains the references to
+ * the data structures we need to get the data to display.
+ */
+static int igb_add_hwmon_attr(struct igb_adapter *adapter,
+			      unsigned int offset, int type)
+{
+	int rc;
+	unsigned int n_attr;
+	struct hwmon_attr *igb_attr;
+
+	n_attr = adapter->igb_hwmon_buff->n_hwmon;
+	igb_attr = &adapter->igb_hwmon_buff->hwmon_list[n_attr];
+
+	switch (type) {
+	case IGB_HWMON_TYPE_LOC:
+		igb_attr->dev_attr.show = igb_hwmon_show_location;
+		snprintf(igb_attr->name, sizeof(igb_attr->name),
+			 "temp%u_label", offset + 1);
+		break;
+	case IGB_HWMON_TYPE_TEMP:
+		igb_attr->dev_attr.show = igb_hwmon_show_temp;
+		snprintf(igb_attr->name, sizeof(igb_attr->name),
+			 "temp%u_input", offset + 1);
+		break;
+	case IGB_HWMON_TYPE_CAUTION:
+		igb_attr->dev_attr.show = igb_hwmon_show_cautionthresh;
+		snprintf(igb_attr->name, sizeof(igb_attr->name),
+			 "temp%u_max", offset + 1);
+		break;
+	case IGB_HWMON_TYPE_MAX:
+		igb_attr->dev_attr.show = igb_hwmon_show_maxopthresh;
+		snprintf(igb_attr->name, sizeof(igb_attr->name),
+			 "temp%u_crit", offset + 1);
+		break;
+	default:
+		rc = -EPERM;
+		return rc;
+	}
+
+	/* These always the same regardless of type */
+	igb_attr->sensor =
+		&adapter->hw.mac.thermal_sensor_data.sensor[offset];
+	igb_attr->hw = &adapter->hw;
+	igb_attr->dev_attr.store = NULL;
+	igb_attr->dev_attr.attr.mode = 0444;
+	igb_attr->dev_attr.attr.name = igb_attr->name;
+	sysfs_attr_init(&igb_attr->dev_attr.attr);
+
+	adapter->igb_hwmon_buff->attrs[n_attr] = &igb_attr->dev_attr.attr;
+
+	++adapter->igb_hwmon_buff->n_hwmon;
+
+	return 0;
+}
+
+static void igb_sysfs_del_adapter(struct igb_adapter *adapter)
+{
+}
+
+/* called from igb_main.c */
+void igb_sysfs_exit(struct igb_adapter *adapter)
+{
+	igb_sysfs_del_adapter(adapter);
+}
+
+/* called from igb_main.c */
+int igb_sysfs_init(struct igb_adapter *adapter)
+{
+	struct hwmon_buff *igb_hwmon;
+	struct i2c_client *client;
+	struct device *hwmon_dev;
+	unsigned int i;
+	int rc = 0;
+
+	/* If this method isn't defined we don't support thermals */
+	if (adapter->hw.mac.ops.init_thermal_sensor_thresh == NULL)
+		goto exit;
+
+	/* Don't create thermal hwmon interface if no sensors present */
+	rc = (adapter->hw.mac.ops.init_thermal_sensor_thresh(&adapter->hw));
+	if (rc)
+		goto exit;
+
+	igb_hwmon = devm_kzalloc(&adapter->pdev->dev, sizeof(*igb_hwmon),
+				 GFP_KERNEL);
+	if (!igb_hwmon) {
+		rc = -ENOMEM;
+		goto exit;
+	}
+	adapter->igb_hwmon_buff = igb_hwmon;
+
+	for (i = 0; i < E1000_MAX_SENSORS; i++) {
+
+		/* Only create hwmon sysfs entries for sensors that have
+		 * meaningful data.
+		 */
+		if (adapter->hw.mac.thermal_sensor_data.sensor[i].location == 0)
+			continue;
+
+		/* Bail if any hwmon attr struct fails to initialize */
+		rc = igb_add_hwmon_attr(adapter, i, IGB_HWMON_TYPE_CAUTION);
+		if (rc)
+			goto exit;
+		rc = igb_add_hwmon_attr(adapter, i, IGB_HWMON_TYPE_LOC);
+		if (rc)
+			goto exit;
+		rc = igb_add_hwmon_attr(adapter, i, IGB_HWMON_TYPE_TEMP);
+		if (rc)
+			goto exit;
+		rc = igb_add_hwmon_attr(adapter, i, IGB_HWMON_TYPE_MAX);
+		if (rc)
+			goto exit;
+	}
+
+	/* init i2c_client */
+	client = i2c_new_device(&adapter->i2c_adap, &i350_sensor_info);
+	if (client == NULL) {
+		dev_info(&adapter->pdev->dev,
+			 "Failed to create new i2c device.\n");
+		rc = -ENODEV;
+		goto exit;
+	}
+	adapter->i2c_client = client;
+
+	igb_hwmon->groups[0] = &igb_hwmon->group;
+	igb_hwmon->group.attrs = igb_hwmon->attrs;
+
+	hwmon_dev = devm_hwmon_device_register_with_groups(&adapter->pdev->dev,
+							   client->name,
+							   igb_hwmon,
+							   igb_hwmon->groups);
+	if (IS_ERR(hwmon_dev)) {
+		rc = PTR_ERR(hwmon_dev);
+		goto err;
+	}
+
+	goto exit;
+
+err:
+	igb_sysfs_del_adapter(adapter);
+exit:
+	return rc;
+}
+#endif