1 // SPDX-License-Identifier: GPL-2.0
2 /* Copyright(c) 2007 - 2018 Intel Corporation. */
3
4 #include "igb.h"
5 #include "e1000_82575.h"
6 #include "e1000_hw.h"
7
8 #include <linux/module.h>
9 #include <linux/types.h>
10 #include <linux/sysfs.h>
11 #include <linux/kobject.h>
12 #include <linux/device.h>
13 #include <linux/netdevice.h>
14 #include <linux/hwmon.h>
15 #include <linux/pci.h>
16
17 #ifdef CONFIG_IGB_HWMON
18 static struct i2c_board_info i350_sensor_info = {
19 I2C_BOARD_INFO("i350bb", (0Xf8 >> 1)),
20 };
21
22 /* hwmon callback functions */
igb_hwmon_show_location(struct device * dev,struct device_attribute * attr,char * buf)23 static ssize_t igb_hwmon_show_location(struct device *dev,
24 struct device_attribute *attr,
25 char *buf)
26 {
27 struct hwmon_attr *igb_attr = container_of(attr, struct hwmon_attr,
28 dev_attr);
29 return sprintf(buf, "loc%u\n",
30 igb_attr->sensor->location);
31 }
32
igb_hwmon_show_temp(struct device * dev,struct device_attribute * attr,char * buf)33 static ssize_t igb_hwmon_show_temp(struct device *dev,
34 struct device_attribute *attr,
35 char *buf)
36 {
37 struct hwmon_attr *igb_attr = container_of(attr, struct hwmon_attr,
38 dev_attr);
39 unsigned int value;
40
41 /* reset the temp field */
42 igb_attr->hw->mac.ops.get_thermal_sensor_data(igb_attr->hw);
43
44 value = igb_attr->sensor->temp;
45
46 /* display millidegree */
47 value *= 1000;
48
49 return sprintf(buf, "%u\n", value);
50 }
51
igb_hwmon_show_cautionthresh(struct device * dev,struct device_attribute * attr,char * buf)52 static ssize_t igb_hwmon_show_cautionthresh(struct device *dev,
53 struct device_attribute *attr,
54 char *buf)
55 {
56 struct hwmon_attr *igb_attr = container_of(attr, struct hwmon_attr,
57 dev_attr);
58 unsigned int value = igb_attr->sensor->caution_thresh;
59
60 /* display millidegree */
61 value *= 1000;
62
63 return sprintf(buf, "%u\n", value);
64 }
65
igb_hwmon_show_maxopthresh(struct device * dev,struct device_attribute * attr,char * buf)66 static ssize_t igb_hwmon_show_maxopthresh(struct device *dev,
67 struct device_attribute *attr,
68 char *buf)
69 {
70 struct hwmon_attr *igb_attr = container_of(attr, struct hwmon_attr,
71 dev_attr);
72 unsigned int value = igb_attr->sensor->max_op_thresh;
73
74 /* display millidegree */
75 value *= 1000;
76
77 return sprintf(buf, "%u\n", value);
78 }
79
80 /* igb_add_hwmon_attr - Create hwmon attr table for a hwmon sysfs file.
81 * @ adapter: pointer to the adapter structure
82 * @ offset: offset in the eeprom sensor data table
83 * @ type: type of sensor data to display
84 *
85 * For each file we want in hwmon's sysfs interface we need a device_attribute
86 * This is included in our hwmon_attr struct that contains the references to
87 * the data structures we need to get the data to display.
88 */
igb_add_hwmon_attr(struct igb_adapter * adapter,unsigned int offset,int type)89 static int igb_add_hwmon_attr(struct igb_adapter *adapter,
90 unsigned int offset, int type)
91 {
92 int rc;
93 unsigned int n_attr;
94 struct hwmon_attr *igb_attr;
95
96 n_attr = adapter->igb_hwmon_buff->n_hwmon;
97 igb_attr = &adapter->igb_hwmon_buff->hwmon_list[n_attr];
98
99 switch (type) {
100 case IGB_HWMON_TYPE_LOC:
101 igb_attr->dev_attr.show = igb_hwmon_show_location;
102 snprintf(igb_attr->name, sizeof(igb_attr->name),
103 "temp%u_label", offset + 1);
104 break;
105 case IGB_HWMON_TYPE_TEMP:
106 igb_attr->dev_attr.show = igb_hwmon_show_temp;
107 snprintf(igb_attr->name, sizeof(igb_attr->name),
108 "temp%u_input", offset + 1);
109 break;
110 case IGB_HWMON_TYPE_CAUTION:
111 igb_attr->dev_attr.show = igb_hwmon_show_cautionthresh;
112 snprintf(igb_attr->name, sizeof(igb_attr->name),
113 "temp%u_max", offset + 1);
114 break;
115 case IGB_HWMON_TYPE_MAX:
116 igb_attr->dev_attr.show = igb_hwmon_show_maxopthresh;
117 snprintf(igb_attr->name, sizeof(igb_attr->name),
118 "temp%u_crit", offset + 1);
119 break;
120 default:
121 rc = -EPERM;
122 return rc;
123 }
124
125 /* These always the same regardless of type */
126 igb_attr->sensor =
127 &adapter->hw.mac.thermal_sensor_data.sensor[offset];
128 igb_attr->hw = &adapter->hw;
129 igb_attr->dev_attr.store = NULL;
130 igb_attr->dev_attr.attr.mode = 0444;
131 igb_attr->dev_attr.attr.name = igb_attr->name;
132 sysfs_attr_init(&igb_attr->dev_attr.attr);
133
134 adapter->igb_hwmon_buff->attrs[n_attr] = &igb_attr->dev_attr.attr;
135
136 ++adapter->igb_hwmon_buff->n_hwmon;
137
138 return 0;
139 }
140
igb_sysfs_del_adapter(struct igb_adapter * adapter)141 static void igb_sysfs_del_adapter(struct igb_adapter *adapter)
142 {
143 }
144
145 /* called from igb_main.c */
igb_sysfs_exit(struct igb_adapter * adapter)146 void igb_sysfs_exit(struct igb_adapter *adapter)
147 {
148 igb_sysfs_del_adapter(adapter);
149 }
150
151 /* called from igb_main.c */
igb_sysfs_init(struct igb_adapter * adapter)152 int igb_sysfs_init(struct igb_adapter *adapter)
153 {
154 struct hwmon_buff *igb_hwmon;
155 struct i2c_client *client;
156 struct device *hwmon_dev;
157 unsigned int i;
158 int rc = 0;
159
160 /* If this method isn't defined we don't support thermals */
161 if (adapter->hw.mac.ops.init_thermal_sensor_thresh == NULL)
162 goto exit;
163
164 /* Don't create thermal hwmon interface if no sensors present */
165 rc = (adapter->hw.mac.ops.init_thermal_sensor_thresh(&adapter->hw));
166 if (rc)
167 goto exit;
168
169 igb_hwmon = devm_kzalloc(&adapter->pdev->dev, sizeof(*igb_hwmon),
170 GFP_KERNEL);
171 if (!igb_hwmon) {
172 rc = -ENOMEM;
173 goto exit;
174 }
175 adapter->igb_hwmon_buff = igb_hwmon;
176
177 for (i = 0; i < E1000_MAX_SENSORS; i++) {
178
179 /* Only create hwmon sysfs entries for sensors that have
180 * meaningful data.
181 */
182 if (adapter->hw.mac.thermal_sensor_data.sensor[i].location == 0)
183 continue;
184
185 /* Bail if any hwmon attr struct fails to initialize */
186 rc = igb_add_hwmon_attr(adapter, i, IGB_HWMON_TYPE_CAUTION);
187 if (rc)
188 goto exit;
189 rc = igb_add_hwmon_attr(adapter, i, IGB_HWMON_TYPE_LOC);
190 if (rc)
191 goto exit;
192 rc = igb_add_hwmon_attr(adapter, i, IGB_HWMON_TYPE_TEMP);
193 if (rc)
194 goto exit;
195 rc = igb_add_hwmon_attr(adapter, i, IGB_HWMON_TYPE_MAX);
196 if (rc)
197 goto exit;
198 }
199
200 /* init i2c_client */
201 client = i2c_new_device(&adapter->i2c_adap, &i350_sensor_info);
202 if (client == NULL) {
203 dev_info(&adapter->pdev->dev,
204 "Failed to create new i2c device.\n");
205 rc = -ENODEV;
206 goto exit;
207 }
208 adapter->i2c_client = client;
209
210 igb_hwmon->groups[0] = &igb_hwmon->group;
211 igb_hwmon->group.attrs = igb_hwmon->attrs;
212
213 hwmon_dev = devm_hwmon_device_register_with_groups(&adapter->pdev->dev,
214 client->name,
215 igb_hwmon,
216 igb_hwmon->groups);
217 if (IS_ERR(hwmon_dev)) {
218 rc = PTR_ERR(hwmon_dev);
219 goto err;
220 }
221
222 goto exit;
223
224 err:
225 igb_sysfs_del_adapter(adapter);
226 exit:
227 return rc;
228 }
229 #endif
230
