1 /*******************************************************************************
3 Intel(R) Gigabit Ethernet Linux driver
4 Copyright(c) 2007-2013 Intel Corporation.
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.
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
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.
19 The full GNU General Public License is included in this distribution in
20 the file called "COPYING".
23 e1000-devel Mailing List <e1000-devel@lists.sourceforge.net>
24 Intel Corporation, 5200 N.E. Elam Young Parkway, Hillsboro, OR 97124-6497
26 *******************************************************************************/
29 #include "e1000_82575.h"
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>
41 #ifdef CONFIG_IGB_HWMON
42 /* hwmon callback functions */
43 static ssize_t igb_hwmon_show_location(struct device *dev,
44 struct device_attribute *attr,
47 struct hwmon_attr *igb_attr = container_of(attr, struct hwmon_attr,
49 return sprintf(buf, "loc%u\n",
50 igb_attr->sensor->location);
53 static ssize_t igb_hwmon_show_temp(struct device *dev,
54 struct device_attribute *attr,
57 struct hwmon_attr *igb_attr = container_of(attr, struct hwmon_attr,
61 /* reset the temp field */
62 igb_attr->hw->mac.ops.get_thermal_sensor_data(igb_attr->hw);
64 value = igb_attr->sensor->temp;
66 /* display millidegree */
69 return sprintf(buf, "%u\n", value);
72 static ssize_t igb_hwmon_show_cautionthresh(struct device *dev,
73 struct device_attribute *attr,
76 struct hwmon_attr *igb_attr = container_of(attr, struct hwmon_attr,
78 unsigned int value = igb_attr->sensor->caution_thresh;
80 /* display millidegree */
83 return sprintf(buf, "%u\n", value);
86 static ssize_t igb_hwmon_show_maxopthresh(struct device *dev,
87 struct device_attribute *attr,
90 struct hwmon_attr *igb_attr = container_of(attr, struct hwmon_attr,
92 unsigned int value = igb_attr->sensor->max_op_thresh;
94 /* display millidegree */
97 return sprintf(buf, "%u\n", value);
100 /* igb_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
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.
109 static int igb_add_hwmon_attr(struct igb_adapter *adapter,
110 unsigned int offset, int type) {
113 struct hwmon_attr *igb_attr;
115 n_attr = adapter->igb_hwmon_buff.n_hwmon;
116 igb_attr = &adapter->igb_hwmon_buff.hwmon_list[n_attr];
119 case IGB_HWMON_TYPE_LOC:
120 igb_attr->dev_attr.show = igb_hwmon_show_location;
121 snprintf(igb_attr->name, sizeof(igb_attr->name),
122 "temp%u_label", offset);
124 case IGB_HWMON_TYPE_TEMP:
125 igb_attr->dev_attr.show = igb_hwmon_show_temp;
126 snprintf(igb_attr->name, sizeof(igb_attr->name),
127 "temp%u_input", offset);
129 case IGB_HWMON_TYPE_CAUTION:
130 igb_attr->dev_attr.show = igb_hwmon_show_cautionthresh;
131 snprintf(igb_attr->name, sizeof(igb_attr->name),
132 "temp%u_max", offset);
134 case IGB_HWMON_TYPE_MAX:
135 igb_attr->dev_attr.show = igb_hwmon_show_maxopthresh;
136 snprintf(igb_attr->name, sizeof(igb_attr->name),
137 "temp%u_crit", offset);
144 /* These always the same regardless of type */
146 &adapter->hw.mac.thermal_sensor_data.sensor[offset];
147 igb_attr->hw = &adapter->hw;
148 igb_attr->dev_attr.store = NULL;
149 igb_attr->dev_attr.attr.mode = S_IRUGO;
150 igb_attr->dev_attr.attr.name = igb_attr->name;
151 sysfs_attr_init(&igb_attr->dev_attr.attr);
152 rc = device_create_file(&adapter->pdev->dev,
153 &igb_attr->dev_attr);
155 ++adapter->igb_hwmon_buff.n_hwmon;
160 static void igb_sysfs_del_adapter(struct igb_adapter *adapter)
167 for (i = 0; i < adapter->igb_hwmon_buff.n_hwmon; i++) {
168 device_remove_file(&adapter->pdev->dev,
169 &adapter->igb_hwmon_buff.hwmon_list[i].dev_attr);
172 kfree(adapter->igb_hwmon_buff.hwmon_list);
174 if (adapter->igb_hwmon_buff.device)
175 hwmon_device_unregister(adapter->igb_hwmon_buff.device);
178 /* called from igb_main.c */
179 void igb_sysfs_exit(struct igb_adapter *adapter)
181 igb_sysfs_del_adapter(adapter);
184 /* called from igb_main.c */
185 int igb_sysfs_init(struct igb_adapter *adapter)
187 struct hwmon_buff *igb_hwmon = &adapter->igb_hwmon_buff;
192 /* If this method isn't defined we don't support thermals */
193 if (adapter->hw.mac.ops.init_thermal_sensor_thresh == NULL)
196 /* Don't create thermal hwmon interface if no sensors present */
197 rc = (adapter->hw.mac.ops.init_thermal_sensor_thresh(&adapter->hw));
201 /* Allocation space for max attributes
202 * max num sensors * values (loc, temp, max, caution)
204 n_attrs = E1000_MAX_SENSORS * 4;
205 igb_hwmon->hwmon_list = kcalloc(n_attrs, sizeof(struct hwmon_attr),
207 if (!igb_hwmon->hwmon_list) {
212 igb_hwmon->device = hwmon_device_register(&adapter->pdev->dev);
213 if (IS_ERR(igb_hwmon->device)) {
214 rc = PTR_ERR(igb_hwmon->device);
218 for (i = 0; i < E1000_MAX_SENSORS; i++) {
220 /* Only create hwmon sysfs entries for sensors that have
223 if (adapter->hw.mac.thermal_sensor_data.sensor[i].location == 0)
226 /* Bail if any hwmon attr struct fails to initialize */
227 rc = igb_add_hwmon_attr(adapter, i, IGB_HWMON_TYPE_CAUTION);
228 rc |= igb_add_hwmon_attr(adapter, i, IGB_HWMON_TYPE_LOC);
229 rc |= igb_add_hwmon_attr(adapter, i, IGB_HWMON_TYPE_TEMP);
230 rc |= igb_add_hwmon_attr(adapter, i, IGB_HWMON_TYPE_MAX);
238 igb_sysfs_del_adapter(adapter);