drivers/net/ethernet/intel/igb/igb_hwmon.c

   1 /*******************************************************************************
   2
   3   Intel(R) Gigabit Ethernet Linux driver
   4   Copyright(c) 2007-2013 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 "igb.h"
  29 #include "e1000_82575.h"
  30 #include "e1000_hw.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 #include <linux/pci.h>
  40
  41 #ifdef CONFIG_IGB_HWMON
  42 static struct i2c_board_info i350_sensor_info = {
  43         I2C_BOARD_INFO("i350bb", (0Xf8 >> 1)),
  44 };
  45
  46 /* hwmon callback functions */
  47 static ssize_t igb_hwmon_show_location(struct device *dev,
  48                                        struct device_attribute *attr,
  49                                        char *buf)
  50 {
  51         struct hwmon_attr *igb_attr = container_of(attr, struct hwmon_attr,
  52                                                    dev_attr);
  53         return sprintf(buf, "loc%u\n",
  54                        igb_attr->sensor->location);
  55 }
  56
  57 static ssize_t igb_hwmon_show_temp(struct device *dev,
  58                                    struct device_attribute *attr,
  59                                    char *buf)
  60 {
  61         struct hwmon_attr *igb_attr = container_of(attr, struct hwmon_attr,
  62                                                    dev_attr);
  63         unsigned int value;
  64
  65         /* reset the temp field */
  66         igb_attr->hw->mac.ops.get_thermal_sensor_data(igb_attr->hw);
  67
  68         value = igb_attr->sensor->temp;
  69
  70         /* display millidegree */
  71         value *= 1000;
  72
  73         return sprintf(buf, "%u\n", value);
  74 }
  75
  76 static ssize_t igb_hwmon_show_cautionthresh(struct device *dev,
  77                                             struct device_attribute *attr,
  78                                             char *buf)
  79 {
  80         struct hwmon_attr *igb_attr = container_of(attr, struct hwmon_attr,
  81                                                    dev_attr);
  82         unsigned int value = igb_attr->sensor->caution_thresh;
  83
  84         /* display millidegree */
  85         value *= 1000;
  86
  87         return sprintf(buf, "%u\n", value);
  88 }
  89
  90 static ssize_t igb_hwmon_show_maxopthresh(struct device *dev,
  91                                           struct device_attribute *attr,
  92                                           char *buf)
  93 {
  94         struct hwmon_attr *igb_attr = container_of(attr, struct hwmon_attr,
  95                                                    dev_attr);
  96         unsigned int value = igb_attr->sensor->max_op_thresh;
  97
  98         /* display millidegree */
  99         value *= 1000;
 100
 101         return sprintf(buf, "%u\n", value);
 102 }
 103
 104 /* igb_add_hwmon_attr - Create hwmon attr table for a hwmon sysfs file.
 105  * @ adapter: pointer to the adapter structure
 106  * @ offset: offset in the eeprom sensor data table
 107  * @ type: type of sensor data to display
 108  *
 109  * For each file we want in hwmon's sysfs interface we need a device_attribute
 110  * This is included in our hwmon_attr struct that contains the references to
 111  * the data structures we need to get the data to display.
 112  */
 113 static int igb_add_hwmon_attr(struct igb_adapter *adapter,
 114                               unsigned int offset, int type)
 115 {
 116         int rc;
 117         unsigned int n_attr;
 118         struct hwmon_attr *igb_attr;
 119
 120         n_attr = adapter->igb_hwmon_buff->n_hwmon;
 121         igb_attr = &adapter->igb_hwmon_buff->hwmon_list[n_attr];
 122
 123         switch (type) {
 124         case IGB_HWMON_TYPE_LOC:
 125                 igb_attr->dev_attr.show = igb_hwmon_show_location;
 126                 snprintf(igb_attr->name, sizeof(igb_attr->name),
 127                          "temp%u_label", offset + 1);
 128                 break;
 129         case IGB_HWMON_TYPE_TEMP:
 130                 igb_attr->dev_attr.show = igb_hwmon_show_temp;
 131                 snprintf(igb_attr->name, sizeof(igb_attr->name),
 132                          "temp%u_input", offset + 1);
 133                 break;
 134         case IGB_HWMON_TYPE_CAUTION:
 135                 igb_attr->dev_attr.show = igb_hwmon_show_cautionthresh;
 136                 snprintf(igb_attr->name, sizeof(igb_attr->name),
 137                          "temp%u_max", offset + 1);
 138                 break;
 139         case IGB_HWMON_TYPE_MAX:
 140                 igb_attr->dev_attr.show = igb_hwmon_show_maxopthresh;
 141                 snprintf(igb_attr->name, sizeof(igb_attr->name),
 142                          "temp%u_crit", offset + 1);
 143                 break;
 144         default:
 145                 rc = -EPERM;
 146                 return rc;
 147         }
 148
 149         /* These always the same regardless of type */
 150         igb_attr->sensor =
 151                 &adapter->hw.mac.thermal_sensor_data.sensor[offset];
 152         igb_attr->hw = &adapter->hw;
 153         igb_attr->dev_attr.store = NULL;
 154         igb_attr->dev_attr.attr.mode = S_IRUGO;
 155         igb_attr->dev_attr.attr.name = igb_attr->name;
 156         sysfs_attr_init(&igb_attr->dev_attr.attr);
 157
 158         adapter->igb_hwmon_buff->attrs[n_attr] = &igb_attr->dev_attr.attr;
 159
 160         ++adapter->igb_hwmon_buff->n_hwmon;
 161
 162         return 0;
 163 }
 164
 165 static void igb_sysfs_del_adapter(struct igb_adapter *adapter)
 166 {
 167 }
 168
 169 /* called from igb_main.c */
 170 void igb_sysfs_exit(struct igb_adapter *adapter)
 171 {
 172         igb_sysfs_del_adapter(adapter);
 173 }
 174
 175 /* called from igb_main.c */
 176 int igb_sysfs_init(struct igb_adapter *adapter)
 177 {
 178         struct hwmon_buff *igb_hwmon;
 179         struct i2c_client *client;
 180         struct device *hwmon_dev;
 181         unsigned int i;
 182         int rc = 0;
 183
 184         /* If this method isn't defined we don't support thermals */
 185         if (adapter->hw.mac.ops.init_thermal_sensor_thresh == NULL)
 186                 goto exit;
 187
 188         /* Don't create thermal hwmon interface if no sensors present */
 189         rc = (adapter->hw.mac.ops.init_thermal_sensor_thresh(&adapter->hw));
 190         if (rc)
 191                 goto exit;
 192
 193         igb_hwmon = devm_kzalloc(&adapter->pdev->dev, sizeof(*igb_hwmon),
 194                                  GFP_KERNEL);
 195         if (!igb_hwmon) {
 196                 rc = -ENOMEM;
 197                 goto exit;
 198         }
 199         adapter->igb_hwmon_buff = igb_hwmon;
 200
 201         for (i = 0; i < E1000_MAX_SENSORS; i++) {
 202
 203                 /* Only create hwmon sysfs entries for sensors that have
 204                  * meaningful data.
 205                  */
 206                 if (adapter->hw.mac.thermal_sensor_data.sensor[i].location == 0)
 207                         continue;
 208
 209                 /* Bail if any hwmon attr struct fails to initialize */
 210                 rc = igb_add_hwmon_attr(adapter, i, IGB_HWMON_TYPE_CAUTION);
 211                 if (rc)
 212                         goto exit;
 213                 rc = igb_add_hwmon_attr(adapter, i, IGB_HWMON_TYPE_LOC);
 214                 if (rc)
 215                         goto exit;
 216                 rc = igb_add_hwmon_attr(adapter, i, IGB_HWMON_TYPE_TEMP);
 217                 if (rc)
 218                         goto exit;
 219                 rc = igb_add_hwmon_attr(adapter, i, IGB_HWMON_TYPE_MAX);
 220                 if (rc)
 221                         goto exit;
 222         }
 223
 224         /* init i2c_client */
 225         client = i2c_new_device(&adapter->i2c_adap, &i350_sensor_info);
 226         if (client == NULL) {
 227                 dev_info(&adapter->pdev->dev,
 228                          "Failed to create new i2c device.\n");
 229                 rc = -ENODEV;
 230                 goto exit;
 231         }
 232         adapter->i2c_client = client;
 233
 234         igb_hwmon->groups[0] = &igb_hwmon->group;
 235         igb_hwmon->group.attrs = igb_hwmon->attrs;
 236
 237         hwmon_dev = devm_hwmon_device_register_with_groups(&adapter->pdev->dev,
 238                                                            client->name,
 239                                                            igb_hwmon,
 240                                                            igb_hwmon->groups);
 241         if (IS_ERR(hwmon_dev)) {
 242                 rc = PTR_ERR(hwmon_dev);
 243                 goto err;
 244         }
 245
 246         goto exit;
 247
 248 err:
 249         igb_sysfs_del_adapter(adapter);
 250 exit:
 251         return rc;
 252 }
 253 #endif