1 | // SPDX-License-Identifier: GPL-2.0 |
2 | /* Copyright(c) 1999 - 2018 Intel Corporation. */ |
3 | |
4 | #include "ixgbe.h" |
5 | #include "ixgbe_common.h" |
6 | #include "ixgbe_type.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 | |
16 | /* hwmon callback functions */ |
17 | static ssize_t ixgbe_hwmon_show_location(struct device *dev, |
18 | struct device_attribute *attr, |
19 | char *buf) |
20 | { |
21 | struct hwmon_attr *ixgbe_attr = container_of(attr, struct hwmon_attr, |
22 | dev_attr); |
23 | return sprintf(buf, fmt: "loc%u\n" , |
24 | ixgbe_attr->sensor->location); |
25 | } |
26 | |
27 | static ssize_t ixgbe_hwmon_show_temp(struct device *dev, |
28 | struct device_attribute *attr, |
29 | char *buf) |
30 | { |
31 | struct hwmon_attr *ixgbe_attr = container_of(attr, struct hwmon_attr, |
32 | dev_attr); |
33 | unsigned int value; |
34 | |
35 | /* reset the temp field */ |
36 | ixgbe_attr->hw->mac.ops.get_thermal_sensor_data(ixgbe_attr->hw); |
37 | |
38 | value = ixgbe_attr->sensor->temp; |
39 | |
40 | /* display millidegree */ |
41 | value *= 1000; |
42 | |
43 | return sprintf(buf, fmt: "%u\n" , value); |
44 | } |
45 | |
46 | static ssize_t ixgbe_hwmon_show_cautionthresh(struct device *dev, |
47 | struct device_attribute *attr, |
48 | char *buf) |
49 | { |
50 | struct hwmon_attr *ixgbe_attr = container_of(attr, struct hwmon_attr, |
51 | dev_attr); |
52 | unsigned int value = ixgbe_attr->sensor->caution_thresh; |
53 | |
54 | /* display millidegree */ |
55 | value *= 1000; |
56 | |
57 | return sprintf(buf, fmt: "%u\n" , value); |
58 | } |
59 | |
60 | static ssize_t ixgbe_hwmon_show_maxopthresh(struct device *dev, |
61 | struct device_attribute *attr, |
62 | char *buf) |
63 | { |
64 | struct hwmon_attr *ixgbe_attr = container_of(attr, struct hwmon_attr, |
65 | dev_attr); |
66 | unsigned int value = ixgbe_attr->sensor->max_op_thresh; |
67 | |
68 | /* display millidegree */ |
69 | value *= 1000; |
70 | |
71 | return sprintf(buf, fmt: "%u\n" , value); |
72 | } |
73 | |
74 | /** |
75 | * ixgbe_add_hwmon_attr - Create hwmon attr table for a hwmon sysfs file. |
76 | * @adapter: pointer to the adapter structure |
77 | * @offset: offset in the eeprom sensor data table |
78 | * @type: type of sensor data to display |
79 | * |
80 | * For each file we want in hwmon's sysfs interface we need a device_attribute |
81 | * This is included in our hwmon_attr struct that contains the references to |
82 | * the data structures we need to get the data to display. |
83 | */ |
84 | static int ixgbe_add_hwmon_attr(struct ixgbe_adapter *adapter, |
85 | unsigned int offset, int type) { |
86 | int rc; |
87 | unsigned int n_attr; |
88 | struct hwmon_attr *ixgbe_attr; |
89 | |
90 | n_attr = adapter->ixgbe_hwmon_buff->n_hwmon; |
91 | ixgbe_attr = &adapter->ixgbe_hwmon_buff->hwmon_list[n_attr]; |
92 | |
93 | switch (type) { |
94 | case IXGBE_HWMON_TYPE_LOC: |
95 | ixgbe_attr->dev_attr.show = ixgbe_hwmon_show_location; |
96 | snprintf(buf: ixgbe_attr->name, size: sizeof(ixgbe_attr->name), |
97 | fmt: "temp%u_label" , offset + 1); |
98 | break; |
99 | case IXGBE_HWMON_TYPE_TEMP: |
100 | ixgbe_attr->dev_attr.show = ixgbe_hwmon_show_temp; |
101 | snprintf(buf: ixgbe_attr->name, size: sizeof(ixgbe_attr->name), |
102 | fmt: "temp%u_input" , offset + 1); |
103 | break; |
104 | case IXGBE_HWMON_TYPE_CAUTION: |
105 | ixgbe_attr->dev_attr.show = ixgbe_hwmon_show_cautionthresh; |
106 | snprintf(buf: ixgbe_attr->name, size: sizeof(ixgbe_attr->name), |
107 | fmt: "temp%u_max" , offset + 1); |
108 | break; |
109 | case IXGBE_HWMON_TYPE_MAX: |
110 | ixgbe_attr->dev_attr.show = ixgbe_hwmon_show_maxopthresh; |
111 | snprintf(buf: ixgbe_attr->name, size: sizeof(ixgbe_attr->name), |
112 | fmt: "temp%u_crit" , offset + 1); |
113 | break; |
114 | default: |
115 | rc = -EPERM; |
116 | return rc; |
117 | } |
118 | |
119 | /* These always the same regardless of type */ |
120 | ixgbe_attr->sensor = |
121 | &adapter->hw.mac.thermal_sensor_data.sensor[offset]; |
122 | ixgbe_attr->hw = &adapter->hw; |
123 | ixgbe_attr->dev_attr.store = NULL; |
124 | ixgbe_attr->dev_attr.attr.mode = 0444; |
125 | ixgbe_attr->dev_attr.attr.name = ixgbe_attr->name; |
126 | sysfs_attr_init(&ixgbe_attr->dev_attr.attr); |
127 | |
128 | adapter->ixgbe_hwmon_buff->attrs[n_attr] = &ixgbe_attr->dev_attr.attr; |
129 | |
130 | ++adapter->ixgbe_hwmon_buff->n_hwmon; |
131 | |
132 | return 0; |
133 | } |
134 | |
135 | static void ixgbe_sysfs_del_adapter(struct ixgbe_adapter *adapter) |
136 | { |
137 | } |
138 | |
139 | /* called from ixgbe_main.c */ |
140 | void ixgbe_sysfs_exit(struct ixgbe_adapter *adapter) |
141 | { |
142 | ixgbe_sysfs_del_adapter(adapter); |
143 | } |
144 | |
145 | /* called from ixgbe_main.c */ |
146 | int ixgbe_sysfs_init(struct ixgbe_adapter *adapter) |
147 | { |
148 | struct hwmon_buff *ixgbe_hwmon; |
149 | struct device *hwmon_dev; |
150 | unsigned int i; |
151 | int rc = 0; |
152 | |
153 | /* If this method isn't defined we don't support thermals */ |
154 | if (adapter->hw.mac.ops.init_thermal_sensor_thresh == NULL) { |
155 | goto exit; |
156 | } |
157 | |
158 | /* Don't create thermal hwmon interface if no sensors present */ |
159 | if (adapter->hw.mac.ops.init_thermal_sensor_thresh(&adapter->hw)) |
160 | goto exit; |
161 | |
162 | ixgbe_hwmon = devm_kzalloc(dev: &adapter->pdev->dev, size: sizeof(*ixgbe_hwmon), |
163 | GFP_KERNEL); |
164 | if (ixgbe_hwmon == NULL) { |
165 | rc = -ENOMEM; |
166 | goto exit; |
167 | } |
168 | adapter->ixgbe_hwmon_buff = ixgbe_hwmon; |
169 | |
170 | for (i = 0; i < IXGBE_MAX_SENSORS; i++) { |
171 | /* |
172 | * Only create hwmon sysfs entries for sensors that have |
173 | * meaningful data for. |
174 | */ |
175 | if (adapter->hw.mac.thermal_sensor_data.sensor[i].location == 0) |
176 | continue; |
177 | |
178 | /* Bail if any hwmon attr struct fails to initialize */ |
179 | rc = ixgbe_add_hwmon_attr(adapter, offset: i, IXGBE_HWMON_TYPE_CAUTION); |
180 | if (rc) |
181 | goto exit; |
182 | rc = ixgbe_add_hwmon_attr(adapter, offset: i, IXGBE_HWMON_TYPE_LOC); |
183 | if (rc) |
184 | goto exit; |
185 | rc = ixgbe_add_hwmon_attr(adapter, offset: i, IXGBE_HWMON_TYPE_TEMP); |
186 | if (rc) |
187 | goto exit; |
188 | rc = ixgbe_add_hwmon_attr(adapter, offset: i, IXGBE_HWMON_TYPE_MAX); |
189 | if (rc) |
190 | goto exit; |
191 | } |
192 | |
193 | ixgbe_hwmon->groups[0] = &ixgbe_hwmon->group; |
194 | ixgbe_hwmon->group.attrs = ixgbe_hwmon->attrs; |
195 | |
196 | hwmon_dev = devm_hwmon_device_register_with_groups(dev: &adapter->pdev->dev, |
197 | name: "ixgbe" , |
198 | drvdata: ixgbe_hwmon, |
199 | groups: ixgbe_hwmon->groups); |
200 | if (IS_ERR(ptr: hwmon_dev)) |
201 | rc = PTR_ERR(ptr: hwmon_dev); |
202 | exit: |
203 | return rc; |
204 | } |
205 | |
206 | |