aboutsummaryrefslogtreecommitdiffstats
path: root/drivers/net/ethernet/intel/igb/igb_hwmon.c
blob: 0478a1abe54110d1374c6d77d950f6a4d7bf0327 (plain)
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
156
157
158
159
160
161
162
163
164
165
166
167
168
169
170
171
172
173
174
175
176
177
178
179
180
181
182
183
184
185
186
187
188
189
190
191
192
193
194
195
196
197
198
199
200
201
202
203
204
205
206
207
208
209
210
211
212
213
214
215
216
217
218
219
220
221
222
223
224
225
226
227
228
229
230
231
232
233
234
235
236
237
238
239
240
241
242
243
244
245
246
247
248
249
250
251
252
253
254
255
256
/*******************************************************************************

  Intel(R) Gigabit Ethernet Linux driver
  Copyright(c) 2007-2013 Intel Corporation.

  This program is free software; you can redistribute it and/or modify it
  under the terms and conditions of the GNU General Public License,
  version 2, as published by the Free Software Foundation.

  This program is distributed in the hope it will be useful, but WITHOUT
  ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
  FITNESS FOR A PARTICULAR PURPOSE.  See the GNU General Public License for
  more details.

  You should have received a copy of the GNU General Public License along with
  this program; if not, write to the Free Software Foundation, Inc.,
  51 Franklin St - Fifth Floor, Boston, MA 02110-1301 USA.

  The full GNU General Public License is included in this distribution in
  the file called "COPYING".

  Contact Information:
  e1000-devel Mailing List <e1000-devel@lists.sourceforge.net>
  Intel Corporation, 5200 N.E. Elam Young Parkway, Hillsboro, OR 97124-6497

*******************************************************************************/

#include "igb.h"
#include "e1000_82575.h"
#include "e1000_hw.h"

#include <linux/module.h>
#include <linux/types.h>
#include <linux/sysfs.h>
#include <linux/kobject.h>
#include <linux/device.h>
#include <linux/netdevice.h>
#include <linux/hwmon.h>
#include <linux/pci.h>

#ifdef CONFIG_IGB_HWMON
static struct i2c_board_info i350_sensor_info = {
	I2C_BOARD_INFO("i350bb", (0Xf8 >> 1)),
};

/* hwmon callback functions */
static ssize_t igb_hwmon_show_location(struct device *dev,
					 struct device_attribute *attr,
					 char *buf)
{
	struct hwmon_attr *igb_attr = container_of(attr, struct hwmon_attr,
						     dev_attr);
	return sprintf(buf, "loc%u\n",
		       igb_attr->sensor->location);
}

static ssize_t igb_hwmon_show_temp(struct device *dev,
				     struct device_attribute *attr,
				     char *buf)
{
	struct hwmon_attr *igb_attr = container_of(attr, struct hwmon_attr,
						     dev_attr);
	unsigned int value;

	/* reset the temp field */
	igb_attr->hw->mac.ops.get_thermal_sensor_data(igb_attr->hw);

	value = igb_attr->sensor->temp;

	/* display millidegree */
	value *= 1000;

	return sprintf(buf, "%u\n", value);
}

static ssize_t igb_hwmon_show_cautionthresh(struct device *dev,
				     struct device_attribute *attr,
				     char *buf)
{
	struct hwmon_attr *igb_attr = container_of(attr, struct hwmon_attr,
						     dev_attr);
	unsigned int value = igb_attr->sensor->caution_thresh;

	/* display millidegree */
	value *= 1000;

	return sprintf(buf, "%u\n", value);
}

static ssize_t igb_hwmon_show_maxopthresh(struct device *dev,
				     struct device_attribute *attr,
				     char *buf)
{
	struct hwmon_attr *igb_attr = container_of(attr, struct hwmon_attr,
						     dev_attr);
	unsigned int value = igb_attr->sensor->max_op_thresh;

	/* display millidegree */
	value *= 1000;

	return sprintf(buf, "%u\n", value);
}

/* igb_add_hwmon_attr - Create hwmon attr table for a hwmon sysfs file.
 * @ adapter: pointer to the adapter structure
 * @ offset: offset in the eeprom sensor data table
 * @ type: type of sensor data to display
 *
 * For each file we want in hwmon's sysfs interface we need a device_attribute
 * This is included in our hwmon_attr struct that contains the references to
 * the data structures we need to get the data to display.
 */
static int igb_add_hwmon_attr(struct igb_adapter *adapter,
				unsigned int offset, int type) {
	int rc;
	unsigned int n_attr;
	struct hwmon_attr *igb_attr;

	n_attr = adapter->igb_hwmon_buff.n_hwmon;
	igb_attr = &adapter->igb_hwmon_buff.hwmon_list[n_attr];

	switch (type) {
	case IGB_HWMON_TYPE_LOC:
		igb_attr->dev_attr.show = igb_hwmon_show_location;
		snprintf(igb_attr->name, sizeof(igb_attr->name),
			 "temp%u_label", offset);
		break;
	case IGB_HWMON_TYPE_TEMP:
		igb_attr->dev_attr.show = igb_hwmon_show_temp;
		snprintf(igb_attr->name, sizeof(igb_attr->name),
			 "temp%u_input", offset);
		break;
	case IGB_HWMON_TYPE_CAUTION:
		igb_attr->dev_attr.show = igb_hwmon_show_cautionthresh;
		snprintf(igb_attr->name, sizeof(igb_attr->name),
			 "temp%u_max", offset);
		break;
	case IGB_HWMON_TYPE_MAX:
		igb_attr->dev_attr.show = igb_hwmon_show_maxopthresh;
		snprintf(igb_attr->name, sizeof(igb_attr->name),
			 "temp%u_crit", offset);
		break;
	default:
		rc = -EPERM;
		return rc;
	}

	/* These always the same regardless of type */
	igb_attr->sensor =
		&adapter->hw.mac.thermal_sensor_data.sensor[offset];
	igb_attr->hw = &adapter->hw;
	igb_attr->dev_attr.store = NULL;
	igb_attr->dev_attr.attr.mode = S_IRUGO;
	igb_attr->dev_attr.attr.name = igb_attr->name;
	sysfs_attr_init(&igb_attr->dev_attr.attr);
	rc = device_create_file(&adapter->pdev->dev,
				&igb_attr->dev_attr);
	if (rc == 0)
		++adapter->igb_hwmon_buff.n_hwmon;

	return rc;
}

static void igb_sysfs_del_adapter(struct igb_adapter *adapter)
{
	int i;

	if (adapter == NULL)
		return;

	for (i = 0; i < adapter->igb_hwmon_buff.n_hwmon; i++) {
		device_remove_file(&adapter->pdev->dev,
			   &adapter->igb_hwmon_buff.hwmon_list[i].dev_attr);
	}

	kfree(adapter->igb_hwmon_buff.hwmon_list);

	if (adapter->igb_hwmon_buff.device)
		hwmon_device_unregister(adapter->igb_hwmon_buff.device);
}

/* called from igb_main.c */
void igb_sysfs_exit(struct igb_adapter *adapter)
{
	igb_sysfs_del_adapter(adapter);
}

/* called from igb_main.c */
int igb_sysfs_init(struct igb_adapter *adapter)
{
	struct hwmon_buff *igb_hwmon = &adapter->igb_hwmon_buff;
	unsigned int i;
	int n_attrs;
	int rc = 0;
	struct i2c_client *client = NULL;

	/* If this method isn't defined we don't support thermals */
	if (adapter->hw.mac.ops.init_thermal_sensor_thresh == NULL)
		goto exit;

	/* Don't create thermal hwmon interface if no sensors present */
	rc = (adapter->hw.mac.ops.init_thermal_sensor_thresh(&adapter->hw));
		if (rc)
			goto exit;

	/* init i2c_client */
	client = i2c_new_device(&adapter->i2c_adap, &i350_sensor_info);
	if (client == NULL) {
		dev_info(&adapter->pdev->dev,
			"Failed to create new i2c device..\n");
		goto exit;
	}
	adapter->i2c_client = client;

	/* Allocation space for max attributes
	 * max num sensors * values (loc, temp, max, caution)
	 */
	n_attrs = E1000_MAX_SENSORS * 4;
	igb_hwmon->hwmon_list = kcalloc(n_attrs, sizeof(struct hwmon_attr),
					  GFP_KERNEL);
	if (!igb_hwmon->hwmon_list) {
		rc = -ENOMEM;
		goto err;
	}

	igb_hwmon->device = hwmon_device_register(&adapter->pdev->dev);
	if (IS_ERR(igb_hwmon->device)) {
		rc = PTR_ERR(igb_hwmon->device);
		goto err;
	}

	for (i = 0; i < E1000_MAX_SENSORS; i++) {

		/* Only create hwmon sysfs entries for sensors that have
		 * meaningful data.
		 */
		if (adapter->hw.mac.thermal_sensor_data.sensor[i].location == 0)
			continue;

		/* Bail if any hwmon attr struct fails to initialize */
		rc = igb_add_hwmon_attr(adapter, i, IGB_HWMON_TYPE_CAUTION);
		rc |= igb_add_hwmon_attr(adapter, i, IGB_HWMON_TYPE_LOC);
		rc |= igb_add_hwmon_attr(adapter, i, IGB_HWMON_TYPE_TEMP);
		rc |= igb_add_hwmon_attr(adapter, i, IGB_HWMON_TYPE_MAX);
		if (rc)
			goto err;
	}

	goto exit;

err:
	igb_sysfs_del_adapter(adapter);
exit:
	return rc;
}
#endif

Privacy Policy