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   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 */
  42 static 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
  52 static 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
  71 static 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
  85 static 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  */
 109 static 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
 160 static void ixgbe_sysfs_del_adapter(struct ixgbe_adapter *adapter)
 161 {
 162 }
 163
 164 /* called from ixgbe_main.c */
 165 void ixgbe_sysfs_exit(struct ixgbe_adapter *adapter)
 166 {
 167         ixgbe_sysfs_del_adapter(adapter);
 168 }
 169
 170 /* called from ixgbe_main.c */
 171 int 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);
 227 exit:
 228         return rc;
 229 }
 230