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1 | /******************************************************************************* |
2 | ||
3 | Intel(R) Gigabit Ethernet Linux driver | |
4 | Copyright(c) 2007-2012 Intel Corporation. | |
5 | ||
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. | |
9 | ||
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 | |
13 | more details. | |
14 | ||
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. | |
18 | ||
19 | The full GNU General Public License is included in this distribution in | |
20 | the file called "COPYING". | |
21 | ||
22 | Contact Information: | |
23 | e1000-devel Mailing List <e1000-devel@lists.sourceforge.net> | |
24 | Intel Corporation, 5200 N.E. Elam Young Parkway, Hillsboro, OR 97124-6497 | |
25 | ||
26 | *******************************************************************************/ | |
27 | ||
28 | #include "igb.h" | |
29 | #include "e1000_82575.h" | |
30 | #include "e1000_hw.h" | |
31 | ||
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> | |
40 | ||
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, | |
45 | char *buf) | |
46 | { | |
47 | struct hwmon_attr *igb_attr = container_of(attr, struct hwmon_attr, | |
48 | dev_attr); | |
49 | return sprintf(buf, "loc%u\n", | |
50 | igb_attr->sensor->location); | |
51 | } | |
52 | ||
53 | static ssize_t igb_hwmon_show_temp(struct device *dev, | |
54 | struct device_attribute *attr, | |
55 | char *buf) | |
56 | { | |
57 | struct hwmon_attr *igb_attr = container_of(attr, struct hwmon_attr, | |
58 | dev_attr); | |
59 | unsigned int value; | |
60 | ||
61 | /* reset the temp field */ | |
62 | igb_attr->hw->mac.ops.get_thermal_sensor_data(igb_attr->hw); | |
63 | ||
64 | value = igb_attr->sensor->temp; | |
65 | ||
66 | /* display millidegree */ | |
67 | value *= 1000; | |
68 | ||
69 | return sprintf(buf, "%u\n", value); | |
70 | } | |
71 | ||
72 | static ssize_t igb_hwmon_show_cautionthresh(struct device *dev, | |
73 | struct device_attribute *attr, | |
74 | char *buf) | |
75 | { | |
76 | struct hwmon_attr *igb_attr = container_of(attr, struct hwmon_attr, | |
77 | dev_attr); | |
78 | unsigned int value = igb_attr->sensor->caution_thresh; | |
79 | ||
80 | /* display millidegree */ | |
81 | value *= 1000; | |
82 | ||
83 | return sprintf(buf, "%u\n", value); | |
84 | } | |
85 | ||
86 | static ssize_t igb_hwmon_show_maxopthresh(struct device *dev, | |
87 | struct device_attribute *attr, | |
88 | char *buf) | |
89 | { | |
90 | struct hwmon_attr *igb_attr = container_of(attr, struct hwmon_attr, | |
91 | dev_attr); | |
92 | unsigned int value = igb_attr->sensor->max_op_thresh; | |
93 | ||
94 | /* display millidegree */ | |
95 | value *= 1000; | |
96 | ||
97 | return sprintf(buf, "%u\n", value); | |
98 | } | |
99 | ||
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 | |
104 | * | |
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. | |
108 | */ | |
109 | static int igb_add_hwmon_attr(struct igb_adapter *adapter, | |
110 | unsigned int offset, int type) { | |
111 | int rc; | |
112 | unsigned int n_attr; | |
113 | struct hwmon_attr *igb_attr; | |
114 | ||
115 | n_attr = adapter->igb_hwmon_buff.n_hwmon; | |
116 | igb_attr = &adapter->igb_hwmon_buff.hwmon_list[n_attr]; | |
117 | ||
118 | switch (type) { | |
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); | |
123 | break; | |
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); | |
128 | break; | |
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); | |
133 | break; | |
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); | |
138 | break; | |
139 | default: | |
140 | rc = -EPERM; | |
141 | return rc; | |
142 | } | |
143 | ||
144 | /* These always the same regardless of type */ | |
145 | igb_attr->sensor = | |
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); | |
154 | if (rc == 0) | |
155 | ++adapter->igb_hwmon_buff.n_hwmon; | |
156 | ||
157 | return rc; | |
158 | } | |
159 | ||
160 | static void igb_sysfs_del_adapter(struct igb_adapter *adapter) | |
161 | { | |
162 | int i; | |
163 | ||
164 | if (adapter == NULL) | |
165 | return; | |
166 | ||
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); | |
170 | } | |
171 | ||
172 | kfree(adapter->igb_hwmon_buff.hwmon_list); | |
173 | ||
174 | if (adapter->igb_hwmon_buff.device) | |
175 | hwmon_device_unregister(adapter->igb_hwmon_buff.device); | |
176 | } | |
177 | ||
178 | /* called from igb_main.c */ | |
179 | void igb_sysfs_exit(struct igb_adapter *adapter) | |
180 | { | |
181 | igb_sysfs_del_adapter(adapter); | |
182 | } | |
183 | ||
184 | /* called from igb_main.c */ | |
185 | int igb_sysfs_init(struct igb_adapter *adapter) | |
186 | { | |
187 | struct hwmon_buff *igb_hwmon = &adapter->igb_hwmon_buff; | |
188 | unsigned int i; | |
189 | int n_attrs; | |
190 | int rc = 0; | |
191 | ||
192 | /* If this method isn't defined we don't support thermals */ | |
193 | if (adapter->hw.mac.ops.init_thermal_sensor_thresh == NULL) | |
194 | goto exit; | |
195 | ||
196 | /* Don't create thermal hwmon interface if no sensors present */ | |
197 | rc = (adapter->hw.mac.ops.init_thermal_sensor_thresh(&adapter->hw)); | |
198 | if (rc) | |
199 | goto exit; | |
200 | ||
201 | /* Allocation space for max attributes | |
202 | * max num sensors * values (loc, temp, max, caution) | |
203 | */ | |
204 | n_attrs = E1000_MAX_SENSORS * 4; | |
205 | igb_hwmon->hwmon_list = kcalloc(n_attrs, sizeof(struct hwmon_attr), | |
206 | GFP_KERNEL); | |
207 | if (!igb_hwmon->hwmon_list) { | |
208 | rc = -ENOMEM; | |
209 | goto err; | |
210 | } | |
211 | ||
212 | igb_hwmon->device = hwmon_device_register(&adapter->pdev->dev); | |
213 | if (IS_ERR(igb_hwmon->device)) { | |
214 | rc = PTR_ERR(igb_hwmon->device); | |
215 | goto err; | |
216 | } | |
217 | ||
218 | for (i = 0; i < E1000_MAX_SENSORS; i++) { | |
219 | ||
220 | /* Only create hwmon sysfs entries for sensors that have | |
221 | * meaningful data. | |
222 | */ | |
223 | if (adapter->hw.mac.thermal_sensor_data.sensor[i].location == 0) | |
224 | continue; | |
225 | ||
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); | |
231 | if (rc) | |
232 | goto err; | |
233 | } | |
234 | ||
235 | goto exit; | |
236 | ||
237 | err: | |
238 | igb_sysfs_del_adapter(adapter); | |
239 | exit: | |
240 | return rc; | |
241 | } | |
242 | #endif |