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 */ |
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, fmt: "loc%u\n" , |
30 | igb_attr->sensor->location); |
31 | } |
32 | |
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, fmt: "%u\n" , value); |
50 | } |
51 | |
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, fmt: "%u\n" , value); |
64 | } |
65 | |
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, fmt: "%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 | */ |
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(buf: igb_attr->name, size: sizeof(igb_attr->name), |
103 | fmt: "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(buf: igb_attr->name, size: sizeof(igb_attr->name), |
108 | fmt: "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(buf: igb_attr->name, size: sizeof(igb_attr->name), |
113 | fmt: "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(buf: igb_attr->name, size: sizeof(igb_attr->name), |
118 | fmt: "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 | |
141 | static void igb_sysfs_del_adapter(struct igb_adapter *adapter) |
142 | { |
143 | } |
144 | |
145 | /* called from igb_main.c */ |
146 | void igb_sysfs_exit(struct igb_adapter *adapter) |
147 | { |
148 | igb_sysfs_del_adapter(adapter); |
149 | } |
150 | |
151 | /* called from igb_main.c */ |
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(dev: &adapter->pdev->dev, size: 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, offset: i, IGB_HWMON_TYPE_CAUTION); |
187 | if (rc) |
188 | goto exit; |
189 | rc = igb_add_hwmon_attr(adapter, offset: i, IGB_HWMON_TYPE_LOC); |
190 | if (rc) |
191 | goto exit; |
192 | rc = igb_add_hwmon_attr(adapter, offset: i, IGB_HWMON_TYPE_TEMP); |
193 | if (rc) |
194 | goto exit; |
195 | rc = igb_add_hwmon_attr(adapter, offset: i, IGB_HWMON_TYPE_MAX); |
196 | if (rc) |
197 | goto exit; |
198 | } |
199 | |
200 | /* init i2c_client */ |
201 | client = i2c_new_client_device(adap: &adapter->i2c_adap, info: &i350_sensor_info); |
202 | if (IS_ERR(ptr: client)) { |
203 | dev_info(&adapter->pdev->dev, |
204 | "Failed to create new i2c device.\n" ); |
205 | rc = PTR_ERR(ptr: client); |
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(dev: &adapter->pdev->dev, |
214 | name: client->name, |
215 | drvdata: igb_hwmon, |
216 | groups: igb_hwmon->groups); |
217 | if (IS_ERR(ptr: hwmon_dev)) { |
218 | rc = PTR_ERR(ptr: 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 | |