linux/drivers/net/ethernet/intel/ixgbe/ixgbe_sysfs.c
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   1/*******************************************************************************
   2
   3  Intel 10 Gigabit PCI Express Linux driver
   4  Copyright(c) 1999 - 2013 Intel Corporation.
   5
   6  This program is free software; you can redistribute it and/or modify it
   7  under the terms and conditions of the GNU General Public License,
   8  version 2, as published by the Free Software Foundation.
   9
  10  This program is distributed in the hope it will be useful, but WITHOUT
  11  ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
  12  FITNESS FOR A PARTICULAR PURPOSE.  See the GNU General Public License for
  13  more details.
  14
  15  You should have received a copy of the GNU General Public License along with
  16  this program; if not, write to the Free Software Foundation, Inc.,
  17  51 Franklin St - Fifth Floor, Boston, MA 02110-1301 USA.
  18
  19  The full GNU General Public License is included in this distribution in
  20  the file called "COPYING".
  21
  22  Contact Information:
  23  Linux NICS <linux.nics@intel.com>
  24  e1000-devel Mailing List <e1000-devel@lists.sourceforge.net>
  25  Intel Corporation, 5200 N.E. Elam Young Parkway, Hillsboro, OR 97124-6497
  26
  27*******************************************************************************/
  28
  29#include "ixgbe.h"
  30#include "ixgbe_common.h"
  31#include "ixgbe_type.h"
  32
  33#include <linux/module.h>
  34#include <linux/types.h>
  35#include <linux/sysfs.h>
  36#include <linux/kobject.h>
  37#include <linux/device.h>
  38#include <linux/netdevice.h>
  39#include <linux/hwmon.h>
  40
  41/* hwmon callback functions */
  42static ssize_t ixgbe_hwmon_show_location(struct device *dev,
  43                                         struct device_attribute *attr,
  44                                         char *buf)
  45{
  46        struct hwmon_attr *ixgbe_attr = container_of(attr, struct hwmon_attr,
  47                                                     dev_attr);
  48        return sprintf(buf, "loc%u\n",
  49                       ixgbe_attr->sensor->location);
  50}
  51
  52static ssize_t ixgbe_hwmon_show_temp(struct device *dev,
  53                                     struct device_attribute *attr,
  54                                     char *buf)
  55{
  56        struct hwmon_attr *ixgbe_attr = container_of(attr, struct hwmon_attr,
  57                                                     dev_attr);
  58        unsigned int value;
  59
  60        /* reset the temp field */
  61        ixgbe_attr->hw->mac.ops.get_thermal_sensor_data(ixgbe_attr->hw);
  62
  63        value = ixgbe_attr->sensor->temp;
  64
  65        /* display millidegree */
  66        value *= 1000;
  67
  68        return sprintf(buf, "%u\n", value);
  69}
  70
  71static ssize_t ixgbe_hwmon_show_cautionthresh(struct device *dev,
  72                                     struct device_attribute *attr,
  73                                     char *buf)
  74{
  75        struct hwmon_attr *ixgbe_attr = container_of(attr, struct hwmon_attr,
  76                                                     dev_attr);
  77        unsigned int value = ixgbe_attr->sensor->caution_thresh;
  78
  79        /* display millidegree */
  80        value *= 1000;
  81
  82        return sprintf(buf, "%u\n", value);
  83}
  84
  85static ssize_t ixgbe_hwmon_show_maxopthresh(struct device *dev,
  86                                     struct device_attribute *attr,
  87                                     char *buf)
  88{
  89        struct hwmon_attr *ixgbe_attr = container_of(attr, struct hwmon_attr,
  90                                                     dev_attr);
  91        unsigned int value = ixgbe_attr->sensor->max_op_thresh;
  92
  93        /* display millidegree */
  94        value *= 1000;
  95
  96        return sprintf(buf, "%u\n", value);
  97}
  98
  99/**
 100 * ixgbe_add_hwmon_attr - Create hwmon attr table for a hwmon sysfs file.
 101 * @adapter: pointer to the adapter structure
 102 * @offset: offset in the eeprom sensor data table
 103 * @type: type of sensor data to display
 104 *
 105 * For each file we want in hwmon's sysfs interface we need a device_attribute
 106 * This is included in our hwmon_attr struct that contains the references to
 107 * the data structures we need to get the data to display.
 108 */
 109static int ixgbe_add_hwmon_attr(struct ixgbe_adapter *adapter,
 110                                unsigned int offset, int type) {
 111        int rc;
 112        unsigned int n_attr;
 113        struct hwmon_attr *ixgbe_attr;
 114
 115        n_attr = adapter->ixgbe_hwmon_buff->n_hwmon;
 116        ixgbe_attr = &adapter->ixgbe_hwmon_buff->hwmon_list[n_attr];
 117
 118        switch (type) {
 119        case IXGBE_HWMON_TYPE_LOC:
 120                ixgbe_attr->dev_attr.show = ixgbe_hwmon_show_location;
 121                snprintf(ixgbe_attr->name, sizeof(ixgbe_attr->name),
 122                         "temp%u_label", offset + 1);
 123                break;
 124        case IXGBE_HWMON_TYPE_TEMP:
 125                ixgbe_attr->dev_attr.show = ixgbe_hwmon_show_temp;
 126                snprintf(ixgbe_attr->name, sizeof(ixgbe_attr->name),
 127                         "temp%u_input", offset + 1);
 128                break;
 129        case IXGBE_HWMON_TYPE_CAUTION:
 130                ixgbe_attr->dev_attr.show = ixgbe_hwmon_show_cautionthresh;
 131                snprintf(ixgbe_attr->name, sizeof(ixgbe_attr->name),
 132                         "temp%u_max", offset + 1);
 133                break;
 134        case IXGBE_HWMON_TYPE_MAX:
 135                ixgbe_attr->dev_attr.show = ixgbe_hwmon_show_maxopthresh;
 136                snprintf(ixgbe_attr->name, sizeof(ixgbe_attr->name),
 137                         "temp%u_crit", offset + 1);
 138                break;
 139        default:
 140                rc = -EPERM;
 141                return rc;
 142        }
 143
 144        /* These always the same regardless of type */
 145        ixgbe_attr->sensor =
 146                &adapter->hw.mac.thermal_sensor_data.sensor[offset];
 147        ixgbe_attr->hw = &adapter->hw;
 148        ixgbe_attr->dev_attr.store = NULL;
 149        ixgbe_attr->dev_attr.attr.mode = S_IRUGO;
 150        ixgbe_attr->dev_attr.attr.name = ixgbe_attr->name;
 151        sysfs_attr_init(&ixgbe_attr->dev_attr.attr);
 152
 153        adapter->ixgbe_hwmon_buff->attrs[n_attr] = &ixgbe_attr->dev_attr.attr;
 154
 155        ++adapter->ixgbe_hwmon_buff->n_hwmon;
 156
 157        return 0;
 158}
 159
 160static void ixgbe_sysfs_del_adapter(struct ixgbe_adapter *adapter)
 161{
 162}
 163
 164/* called from ixgbe_main.c */
 165void ixgbe_sysfs_exit(struct ixgbe_adapter *adapter)
 166{
 167        ixgbe_sysfs_del_adapter(adapter);
 168}
 169
 170/* called from ixgbe_main.c */
 171int ixgbe_sysfs_init(struct ixgbe_adapter *adapter)
 172{
 173        struct hwmon_buff *ixgbe_hwmon;
 174        struct device *hwmon_dev;
 175        unsigned int i;
 176        int rc = 0;
 177
 178        /* If this method isn't defined we don't support thermals */
 179        if (adapter->hw.mac.ops.init_thermal_sensor_thresh == NULL) {
 180                goto exit;
 181        }
 182
 183        /* Don't create thermal hwmon interface if no sensors present */
 184        if (adapter->hw.mac.ops.init_thermal_sensor_thresh(&adapter->hw))
 185                goto exit;
 186
 187        ixgbe_hwmon = devm_kzalloc(&adapter->pdev->dev, sizeof(*ixgbe_hwmon),
 188                                   GFP_KERNEL);
 189        if (ixgbe_hwmon == NULL) {
 190                rc = -ENOMEM;
 191                goto exit;
 192        }
 193        adapter->ixgbe_hwmon_buff = ixgbe_hwmon;
 194
 195        for (i = 0; i < IXGBE_MAX_SENSORS; i++) {
 196                /*
 197                 * Only create hwmon sysfs entries for sensors that have
 198                 * meaningful data for.
 199                 */
 200                if (adapter->hw.mac.thermal_sensor_data.sensor[i].location == 0)
 201                        continue;
 202
 203                /* Bail if any hwmon attr struct fails to initialize */
 204                rc = ixgbe_add_hwmon_attr(adapter, i, IXGBE_HWMON_TYPE_CAUTION);
 205                if (rc)
 206                        goto exit;
 207                rc = ixgbe_add_hwmon_attr(adapter, i, IXGBE_HWMON_TYPE_LOC);
 208                if (rc)
 209                        goto exit;
 210                rc = ixgbe_add_hwmon_attr(adapter, i, IXGBE_HWMON_TYPE_TEMP);
 211                if (rc)
 212                        goto exit;
 213                rc = ixgbe_add_hwmon_attr(adapter, i, IXGBE_HWMON_TYPE_MAX);
 214                if (rc)
 215                        goto exit;
 216        }
 217
 218        ixgbe_hwmon->groups[0] = &ixgbe_hwmon->group;
 219        ixgbe_hwmon->group.attrs = ixgbe_hwmon->attrs;
 220
 221        hwmon_dev = devm_hwmon_device_register_with_groups(&adapter->pdev->dev,
 222                                                           "ixgbe",
 223                                                           ixgbe_hwmon,
 224                                                           ixgbe_hwmon->groups);
 225        if (IS_ERR(hwmon_dev))
 226                rc = PTR_ERR(hwmon_dev);
 227exit:
 228        return rc;
 229}
 230
 231