drivers/net/ethernet/intel/igb/igb_hwmon.c - linux - Git at Google

 /* Intel(R) Gigabit Ethernet Linux driver
  * Copyright(c) 2007-2014 Intel Corporation.
  *
  * This program is free software; you can redistribute it and/or modify it
  * under the terms and conditions of the GNU General Public License,
  * version 2, as published by the Free Software Foundation.
  *
  * This program is distributed in the hope it will be useful, but WITHOUT
  * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
  * FITNESS FOR A PARTICULAR PURPOSE.  See the GNU General Public License for
  * more details.
  *
  * You should have received a copy of the GNU General Public License along with
  * this program; if not, see <http://www.gnu.org/licenses/>.
  *
  * The full GNU General Public License is included in this distribution in
  * the file called "COPYING".
  *
  * Contact Information:
  * e1000-devel Mailing List <e1000-devel@lists.sourceforge.net>
  * Intel Corporation, 5200 N.E. Elam Young Parkway, Hillsboro, OR 97124-6497
  */

 #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 = S_IRUGO;
 	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
	/* Intel(R) Gigabit Ethernet Linux driver
	* Copyright(c) 2007-2014 Intel Corporation.
	*
	* This program is free software; you can redistribute it and/or modify it
	* under the terms and conditions of the GNU General Public License,
	* version 2, as published by the Free Software Foundation.
	*
	* This program is distributed in the hope it will be useful, but WITHOUT
	* ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
	* FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License for
	* more details.
	*
	* You should have received a copy of the GNU General Public License along with
	* this program; if not, see <http://www.gnu.org/licenses/>.
	*
	* The full GNU General Public License is included in this distribution in
	* the file called "COPYING".
	*
	* Contact Information:
	* e1000-devel Mailing List <e1000-devel@lists.sourceforge.net>
	* Intel Corporation, 5200 N.E. Elam Young Parkway, Hillsboro, OR 97124-6497
	*/

	#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 = S_IRUGO;
	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