lib/librte_eal/linuxapp/kni/ethtool/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 #ifdef IGB_HWMON
  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 HAVE_I2C_SUPPORT
  42 static struct i2c_board_info i350_sensor_info = {
  43         I2C_BOARD_INFO("i350bb", (0Xf8 >> 1)),
  44 };
  45 #endif /* HAVE_I2C_SUPPORT */
  46
  47 /* hwmon callback functions */
  48 static ssize_t igb_hwmon_show_location(struct device *dev,
  49                                          struct device_attribute *attr,
  50                                          char *buf)
  51 {
  52         struct hwmon_attr *igb_attr = container_of(attr, struct hwmon_attr,
  53                                                      dev_attr);
  54         return sprintf(buf, "loc%u\n",
  55                        igb_attr->sensor->location);
  56 }
  57
  58 static ssize_t igb_hwmon_show_temp(struct device *dev,
  59                                      struct device_attribute *attr,
  60                                      char *buf)
  61 {
  62         struct hwmon_attr *igb_attr = container_of(attr, struct hwmon_attr,
  63                                                      dev_attr);
  64         unsigned int value;
  65
  66         /* reset the temp field */
  67         igb_attr->hw->mac.ops.get_thermal_sensor_data(igb_attr->hw);
  68
  69         value = igb_attr->sensor->temp;
  70
  71         /* display millidegree */
  72         value *= 1000;
  73
  74         return sprintf(buf, "%u\n", value);
  75 }
  76
  77 static ssize_t igb_hwmon_show_cautionthresh(struct device *dev,
  78                                      struct device_attribute *attr,
  79                                      char *buf)
  80 {
  81         struct hwmon_attr *igb_attr = container_of(attr, struct hwmon_attr,
  82                                                      dev_attr);
  83         unsigned int value = igb_attr->sensor->caution_thresh;
  84
  85         /* display millidegree */
  86         value *= 1000;
  87
  88         return sprintf(buf, "%u\n", value);
  89 }
  90
  91 static ssize_t igb_hwmon_show_maxopthresh(struct device *dev,
  92                                      struct device_attribute *attr,
  93                                      char *buf)
  94 {
  95         struct hwmon_attr *igb_attr = container_of(attr, struct hwmon_attr,
  96                                                      dev_attr);
  97         unsigned int value = igb_attr->sensor->max_op_thresh;
  98
  99         /* display millidegree */
 100         value *= 1000;
 101
 102         return sprintf(buf, "%u\n", value);
 103 }
 104
 105 /* igb_add_hwmon_attr - Create hwmon attr table for a hwmon sysfs file.
 106  * @ adapter: pointer to the adapter structure
 107  * @ offset: offset in the eeprom sensor data table
 108  * @ type: type of sensor data to display
 109  *
 110  * For each file we want in hwmon's sysfs interface we need a device_attribute
 111  * This is included in our hwmon_attr struct that contains the references to
 112  * the data structures we need to get the data to display.
 113  */
 114 static int igb_add_hwmon_attr(struct igb_adapter *adapter,
 115                                 unsigned int offset, int type) {
 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);
 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);
 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);
 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);
 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         rc = device_create_file(&adapter->pdev->dev,
 158                                 &igb_attr->dev_attr);
 159         if (rc == 0)
 160                 ++adapter->igb_hwmon_buff.n_hwmon;
 161
 162         return rc;
 163 }
 164
 165 static void igb_sysfs_del_adapter(struct igb_adapter *adapter)
 166 {
 167         int i;
 168
 169         if (adapter == NULL)
 170                 return;
 171
 172         for (i = 0; i < adapter->igb_hwmon_buff.n_hwmon; i++) {
 173                 device_remove_file(&adapter->pdev->dev,
 174                            &adapter->igb_hwmon_buff.hwmon_list[i].dev_attr);
 175         }
 176
 177         kfree(adapter->igb_hwmon_buff.hwmon_list);
 178
 179         if (adapter->igb_hwmon_buff.device)
 180                 hwmon_device_unregister(adapter->igb_hwmon_buff.device);
 181 }
 182
 183 /* called from igb_main.c */
 184 void igb_sysfs_exit(struct igb_adapter *adapter)
 185 {
 186         igb_sysfs_del_adapter(adapter);
 187 }
 188
 189 /* called from igb_main.c */
 190 int igb_sysfs_init(struct igb_adapter *adapter)
 191 {
 192         struct hwmon_buff *igb_hwmon = &adapter->igb_hwmon_buff;
 193         unsigned int i;
 194         int n_attrs;
 195         int rc = 0;
 196 #ifdef HAVE_I2C_SUPPORT
 197         struct i2c_client *client = NULL;
 198 #endif /* HAVE_I2C_SUPPORT */
 199
 200         /* If this method isn't defined we don't support thermals */
 201         if (adapter->hw.mac.ops.init_thermal_sensor_thresh == NULL)
 202                 goto exit;
 203
 204         /* Don't create thermal hwmon interface if no sensors present */
 205         rc = (adapter->hw.mac.ops.init_thermal_sensor_thresh(&adapter->hw));
 206                 if (rc)
 207                         goto exit;
 208 #ifdef HAVE_I2C_SUPPORT
 209         /* init i2c_client */
 210         client = i2c_new_device(&adapter->i2c_adap, &i350_sensor_info);
 211         if (client == NULL) {
 212                 dev_info(&adapter->pdev->dev,
 213                         "Failed to create new i2c device..\n");
 214                 goto exit;
 215         }
 216         adapter->i2c_client = client;
 217 #endif /* HAVE_I2C_SUPPORT */
 218
 219         /* Allocation space for max attributes
 220          * max num sensors * values (loc, temp, max, caution)
 221          */
 222         n_attrs = E1000_MAX_SENSORS * 4;
 223         igb_hwmon->hwmon_list = kcalloc(n_attrs, sizeof(struct hwmon_attr),
 224                                           GFP_KERNEL);
 225         if (!igb_hwmon->hwmon_list) {
 226                 rc = -ENOMEM;
 227                 goto err;
 228         }
 229
 230         igb_hwmon->device = hwmon_device_register(&adapter->pdev->dev);
 231         if (IS_ERR(igb_hwmon->device)) {
 232                 rc = PTR_ERR(igb_hwmon->device);
 233                 goto err;
 234         }
 235
 236         for (i = 0; i < E1000_MAX_SENSORS; i++) {
 237
 238                 /* Only create hwmon sysfs entries for sensors that have
 239                  * meaningful data.
 240                  */
 241                 if (adapter->hw.mac.thermal_sensor_data.sensor[i].location == 0)
 242                         continue;
 243
 244                 /* Bail if any hwmon attr struct fails to initialize */
 245                 rc = igb_add_hwmon_attr(adapter, i, IGB_HWMON_TYPE_CAUTION);
 246                 rc |= igb_add_hwmon_attr(adapter, i, IGB_HWMON_TYPE_LOC);
 247                 rc |= igb_add_hwmon_attr(adapter, i, IGB_HWMON_TYPE_TEMP);
 248                 rc |= igb_add_hwmon_attr(adapter, i, IGB_HWMON_TYPE_MAX);
 249                 if (rc)
 250                         goto err;
 251         }
 252
 253         goto exit;
 254
 255 err:
 256         igb_sysfs_del_adapter(adapter);
 257 exit:
 258         return rc;
 259 }
 260 #endif /* IGB_HWMON */