drivers/net/ethernet/intel/ixgbe/ixgbe_sysfs.c

   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   e1000-devel Mailing List <e1000-devel@lists.sourceforge.net>
  24   Intel Corporation, 5200 N.E. Elam Young Parkway, Hillsboro, OR 97124-6497
  25
  26 *******************************************************************************/
  27
  28 #include "ixgbe.h"
  29 #include "ixgbe_common.h"
  30 #include "ixgbe_type.h"
  31
  32 #include <linux/module.h>
  33 #include <linux/types.h>
  34 #include <linux/sysfs.h>
  35 #include <linux/kobject.h>
  36 #include <linux/device.h>
  37 #include <linux/netdevice.h>
  38 #include <linux/hwmon.h>
  39
  40 /* hwmon callback functions */
  41 static ssize_t ixgbe_hwmon_show_location(struct device *dev,
  42                                          struct device_attribute *attr,
  43                                          char *buf)
  44 {
  45         struct hwmon_attr *ixgbe_attr = container_of(attr, struct hwmon_attr,
  46                                                      dev_attr);
  47         return sprintf(buf, "loc%u\n",
  48                        ixgbe_attr->sensor->location);
  49 }
  50
  51 static ssize_t ixgbe_hwmon_show_temp(struct device *dev,
  52                                      struct device_attribute *attr,
  53                                      char *buf)
  54 {
  55         struct hwmon_attr *ixgbe_attr = container_of(attr, struct hwmon_attr,
  56                                                      dev_attr);
  57         unsigned int value;
  58
  59         /* reset the temp field */
  60         ixgbe_attr->hw->mac.ops.get_thermal_sensor_data(ixgbe_attr->hw);
  61
  62         value = ixgbe_attr->sensor->temp;
  63
  64         /* display millidegree */
  65         value *= 1000;
  66
  67         return sprintf(buf, "%u\n", value);
  68 }
  69
  70 static ssize_t ixgbe_hwmon_show_cautionthresh(struct device *dev,
  71                                      struct device_attribute *attr,
  72                                      char *buf)
  73 {
  74         struct hwmon_attr *ixgbe_attr = container_of(attr, struct hwmon_attr,
  75                                                      dev_attr);
  76         unsigned int value = ixgbe_attr->sensor->caution_thresh;
  77
  78         /* display millidegree */
  79         value *= 1000;
  80
  81         return sprintf(buf, "%u\n", value);
  82 }
  83
  84 static ssize_t ixgbe_hwmon_show_maxopthresh(struct device *dev,
  85                                      struct device_attribute *attr,
  86                                      char *buf)
  87 {
  88         struct hwmon_attr *ixgbe_attr = container_of(attr, struct hwmon_attr,
  89                                                      dev_attr);
  90         unsigned int value = ixgbe_attr->sensor->max_op_thresh;
  91
  92         /* display millidegree */
  93         value *= 1000;
  94
  95         return sprintf(buf, "%u\n", value);
  96 }
  97
  98 /**
  99  * ixgbe_add_hwmon_attr - Create hwmon attr table for a hwmon sysfs file.
 100  * @adapter: pointer to the adapter structure
 101  * @offset: offset in the eeprom sensor data table
 102  * @type: type of sensor data to display
 103  *
 104  * For each file we want in hwmon's sysfs interface we need a device_attribute
 105  * This is included in our hwmon_attr struct that contains the references to
 106  * the data structures we need to get the data to display.
 107  */
 108 static int ixgbe_add_hwmon_attr(struct ixgbe_adapter *adapter,
 109                                 unsigned int offset, int type) {
 110         int rc;
 111         unsigned int n_attr;
 112         struct hwmon_attr *ixgbe_attr;
 113
 114         n_attr = adapter->ixgbe_hwmon_buff->n_hwmon;
 115         ixgbe_attr = &adapter->ixgbe_hwmon_buff->hwmon_list[n_attr];
 116
 117         switch (type) {
 118         case IXGBE_HWMON_TYPE_LOC:
 119                 ixgbe_attr->dev_attr.show = ixgbe_hwmon_show_location;
 120                 snprintf(ixgbe_attr->name, sizeof(ixgbe_attr->name),
 121                          "temp%u_label", offset + 1);
 122                 break;
 123         case IXGBE_HWMON_TYPE_TEMP:
 124                 ixgbe_attr->dev_attr.show = ixgbe_hwmon_show_temp;
 125                 snprintf(ixgbe_attr->name, sizeof(ixgbe_attr->name),
 126                          "temp%u_input", offset + 1);
 127                 break;
 128         case IXGBE_HWMON_TYPE_CAUTION:
 129                 ixgbe_attr->dev_attr.show = ixgbe_hwmon_show_cautionthresh;
 130                 snprintf(ixgbe_attr->name, sizeof(ixgbe_attr->name),
 131                          "temp%u_max", offset + 1);
 132                 break;
 133         case IXGBE_HWMON_TYPE_MAX:
 134                 ixgbe_attr->dev_attr.show = ixgbe_hwmon_show_maxopthresh;
 135                 snprintf(ixgbe_attr->name, sizeof(ixgbe_attr->name),
 136                          "temp%u_crit", offset + 1);
 137                 break;
 138         default:
 139                 rc = -EPERM;
 140                 return rc;
 141         }
 142
 143         /* These always the same regardless of type */
 144         ixgbe_attr->sensor =
 145                 &adapter->hw.mac.thermal_sensor_data.sensor[offset];
 146         ixgbe_attr->hw = &adapter->hw;
 147         ixgbe_attr->dev_attr.store = NULL;
 148         ixgbe_attr->dev_attr.attr.mode = S_IRUGO;
 149         ixgbe_attr->dev_attr.attr.name = ixgbe_attr->name;
 150         sysfs_attr_init(&ixgbe_attr->dev_attr.attr);
 151
 152         adapter->ixgbe_hwmon_buff->attrs[n_attr] = &ixgbe_attr->dev_attr.attr;
 153
 154         ++adapter->ixgbe_hwmon_buff->n_hwmon;
 155
 156         return 0;
 157 }
 158
 159 static void ixgbe_sysfs_del_adapter(struct ixgbe_adapter *adapter)
 160 {
 161 }
 162
 163 /* called from ixgbe_main.c */
 164 void ixgbe_sysfs_exit(struct ixgbe_adapter *adapter)
 165 {
 166         ixgbe_sysfs_del_adapter(adapter);
 167 }
 168
 169 /* called from ixgbe_main.c */
 170 int ixgbe_sysfs_init(struct ixgbe_adapter *adapter)
 171 {
 172         struct hwmon_buff *ixgbe_hwmon;
 173         struct device *hwmon_dev;
 174         unsigned int i;
 175         int rc = 0;
 176
 177         /* If this method isn't defined we don't support thermals */
 178         if (adapter->hw.mac.ops.init_thermal_sensor_thresh == NULL) {
 179                 goto exit;
 180         }
 181
 182         /* Don't create thermal hwmon interface if no sensors present */
 183         if (adapter->hw.mac.ops.init_thermal_sensor_thresh(&adapter->hw))
 184                 goto exit;
 185
 186         ixgbe_hwmon = devm_kzalloc(&adapter->pdev->dev, sizeof(*ixgbe_hwmon),
 187                                    GFP_KERNEL);
 188         if (ixgbe_hwmon == NULL) {
 189                 rc = -ENOMEM;
 190                 goto exit;
 191         }
 192         adapter->ixgbe_hwmon_buff = ixgbe_hwmon;
 193
 194         for (i = 0; i < IXGBE_MAX_SENSORS; i++) {
 195                 /*
 196                  * Only create hwmon sysfs entries for sensors that have
 197                  * meaningful data for.
 198                  */
 199                 if (adapter->hw.mac.thermal_sensor_data.sensor[i].location == 0)
 200                         continue;
 201
 202                 /* Bail if any hwmon attr struct fails to initialize */
 203                 rc = ixgbe_add_hwmon_attr(adapter, i, IXGBE_HWMON_TYPE_CAUTION);
 204                 if (rc)
 205                         goto exit;
 206                 rc = ixgbe_add_hwmon_attr(adapter, i, IXGBE_HWMON_TYPE_LOC);
 207                 if (rc)
 208                         goto exit;
 209                 rc = ixgbe_add_hwmon_attr(adapter, i, IXGBE_HWMON_TYPE_TEMP);
 210                 if (rc)
 211                         goto exit;
 212                 rc = ixgbe_add_hwmon_attr(adapter, i, IXGBE_HWMON_TYPE_MAX);
 213                 if (rc)
 214                         goto exit;
 215         }
 216
 217         ixgbe_hwmon->groups[0] = &ixgbe_hwmon->group;
 218         ixgbe_hwmon->group.attrs = ixgbe_hwmon->attrs;
 219
 220         hwmon_dev = devm_hwmon_device_register_with_groups(&adapter->pdev->dev,
 221                                                            "ixgbe",
 222                                                            ixgbe_hwmon,
 223                                                            ixgbe_hwmon->groups);
 224         if (IS_ERR(hwmon_dev))
 225                 rc = PTR_ERR(hwmon_dev);
 226 exit:
 227         return rc;
 228 }
 229