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
|
/* Broadcom NetXtreme-C/E network driver.
*
* Copyright (c) 2023 Broadcom Limited
*
* This program is free software; you can redistribute it and/or modify
* it under the terms of the GNU General Public License as published by
* the Free Software Foundation.
*/
#include <linux/dev_printk.h>
#include <linux/errno.h>
#include <linux/hwmon.h>
#include <linux/hwmon-sysfs.h>
#include <linux/pci.h>
#include "bnxt_hsi.h"
#include "bnxt.h"
#include "bnxt_hwrm.h"
#include "bnxt_hwmon.h"
void bnxt_hwmon_notify_event(struct bnxt *bp, u32 type)
{
u32 attr;
if (!bp->hwmon_dev)
return;
switch (type) {
case ASYNC_EVENT_CMPL_ERROR_REPORT_THERMAL_EVENT_DATA1_THRESHOLD_TYPE_WARN:
attr = hwmon_temp_max_alarm;
break;
case ASYNC_EVENT_CMPL_ERROR_REPORT_THERMAL_EVENT_DATA1_THRESHOLD_TYPE_CRITICAL:
attr = hwmon_temp_crit_alarm;
break;
case ASYNC_EVENT_CMPL_ERROR_REPORT_THERMAL_EVENT_DATA1_THRESHOLD_TYPE_FATAL:
case ASYNC_EVENT_CMPL_ERROR_REPORT_THERMAL_EVENT_DATA1_THRESHOLD_TYPE_SHUTDOWN:
attr = hwmon_temp_emergency_alarm;
break;
default:
return;
}
hwmon_notify_event(&bp->pdev->dev, hwmon_temp, attr, 0);
}
static int bnxt_hwrm_temp_query(struct bnxt *bp, u8 *temp)
{
struct hwrm_temp_monitor_query_output *resp;
struct hwrm_temp_monitor_query_input *req;
int rc;
rc = hwrm_req_init(bp, req, HWRM_TEMP_MONITOR_QUERY);
if (rc)
return rc;
resp = hwrm_req_hold(bp, req);
rc = hwrm_req_send_silent(bp, req);
if (rc)
goto drop_req;
if (temp) {
*temp = resp->temp;
} else if (resp->flags &
TEMP_MONITOR_QUERY_RESP_FLAGS_THRESHOLD_VALUES_AVAILABLE) {
bp->fw_cap |= BNXT_FW_CAP_THRESHOLD_TEMP_SUPPORTED;
bp->warn_thresh_temp = resp->warn_threshold;
bp->crit_thresh_temp = resp->critical_threshold;
bp->fatal_thresh_temp = resp->fatal_threshold;
bp->shutdown_thresh_temp = resp->shutdown_threshold;
}
drop_req:
hwrm_req_drop(bp, req);
return rc;
}
static umode_t bnxt_hwmon_is_visible(const void *_data, enum hwmon_sensor_types type,
u32 attr, int channel)
{
const struct bnxt *bp = _data;
if (type != hwmon_temp)
return 0;
switch (attr) {
case hwmon_temp_input:
return 0444;
case hwmon_temp_max:
case hwmon_temp_crit:
case hwmon_temp_emergency:
case hwmon_temp_max_alarm:
case hwmon_temp_crit_alarm:
case hwmon_temp_emergency_alarm:
if (!(bp->fw_cap & BNXT_FW_CAP_THRESHOLD_TEMP_SUPPORTED))
return 0;
return 0444;
default:
return 0;
}
}
static int bnxt_hwmon_read(struct device *dev, enum hwmon_sensor_types type, u32 attr,
int channel, long *val)
{
struct bnxt *bp = dev_get_drvdata(dev);
u8 temp = 0;
int rc;
switch (attr) {
case hwmon_temp_input:
rc = bnxt_hwrm_temp_query(bp, &temp);
if (!rc)
*val = temp * 1000;
return rc;
case hwmon_temp_max:
*val = bp->warn_thresh_temp * 1000;
return 0;
case hwmon_temp_crit:
*val = bp->crit_thresh_temp * 1000;
return 0;
case hwmon_temp_emergency:
*val = bp->fatal_thresh_temp * 1000;
return 0;
case hwmon_temp_max_alarm:
rc = bnxt_hwrm_temp_query(bp, &temp);
if (!rc)
*val = temp >= bp->warn_thresh_temp;
return rc;
case hwmon_temp_crit_alarm:
rc = bnxt_hwrm_temp_query(bp, &temp);
if (!rc)
*val = temp >= bp->crit_thresh_temp;
return rc;
case hwmon_temp_emergency_alarm:
rc = bnxt_hwrm_temp_query(bp, &temp);
if (!rc)
*val = temp >= bp->fatal_thresh_temp;
return rc;
default:
return -EOPNOTSUPP;
}
}
static const struct hwmon_channel_info *bnxt_hwmon_info[] = {
HWMON_CHANNEL_INFO(temp, HWMON_T_INPUT | HWMON_T_MAX | HWMON_T_CRIT |
HWMON_T_EMERGENCY | HWMON_T_MAX_ALARM |
HWMON_T_CRIT_ALARM | HWMON_T_EMERGENCY_ALARM),
NULL
};
static const struct hwmon_ops bnxt_hwmon_ops = {
.is_visible = bnxt_hwmon_is_visible,
.read = bnxt_hwmon_read,
};
static const struct hwmon_chip_info bnxt_hwmon_chip_info = {
.ops = &bnxt_hwmon_ops,
.info = bnxt_hwmon_info,
};
static ssize_t temp1_shutdown_show(struct device *dev,
struct device_attribute *attr, char *buf)
{
struct bnxt *bp = dev_get_drvdata(dev);
return sysfs_emit(buf, "%u\n", bp->shutdown_thresh_temp * 1000);
}
static ssize_t temp1_shutdown_alarm_show(struct device *dev,
struct device_attribute *attr, char *buf)
{
struct bnxt *bp = dev_get_drvdata(dev);
u8 temp;
int rc;
rc = bnxt_hwrm_temp_query(bp, &temp);
if (rc)
return -EIO;
return sysfs_emit(buf, "%u\n", temp >= bp->shutdown_thresh_temp);
}
static DEVICE_ATTR_RO(temp1_shutdown);
static DEVICE_ATTR_RO(temp1_shutdown_alarm);
static struct attribute *bnxt_temp_extra_attrs[] = {
&dev_attr_temp1_shutdown.attr,
&dev_attr_temp1_shutdown_alarm.attr,
NULL,
};
static umode_t bnxt_temp_extra_attrs_visible(struct kobject *kobj,
struct attribute *attr, int index)
{
struct device *dev = kobj_to_dev(kobj);
struct bnxt *bp = dev_get_drvdata(dev);
/* Shutdown temperature setting in NVM is optional */
if (!(bp->fw_cap & BNXT_FW_CAP_THRESHOLD_TEMP_SUPPORTED) ||
!bp->shutdown_thresh_temp)
return 0;
return attr->mode;
}
static const struct attribute_group bnxt_temp_extra_group = {
.attrs = bnxt_temp_extra_attrs,
.is_visible = bnxt_temp_extra_attrs_visible,
};
__ATTRIBUTE_GROUPS(bnxt_temp_extra);
void bnxt_hwmon_uninit(struct bnxt *bp)
{
if (bp->hwmon_dev) {
hwmon_device_unregister(bp->hwmon_dev);
bp->hwmon_dev = NULL;
}
}
void bnxt_hwmon_init(struct bnxt *bp)
{
struct pci_dev *pdev = bp->pdev;
int rc;
/* temp1_xxx is only sensor, ensure not registered if it will fail */
rc = bnxt_hwrm_temp_query(bp, NULL);
if (rc == -EACCES || rc == -EOPNOTSUPP) {
bnxt_hwmon_uninit(bp);
return;
}
if (bp->hwmon_dev)
return;
bp->hwmon_dev = hwmon_device_register_with_info(&pdev->dev,
DRV_MODULE_NAME, bp,
&bnxt_hwmon_chip_info,
bnxt_temp_extra_groups);
if (IS_ERR(bp->hwmon_dev)) {
bp->hwmon_dev = NULL;
dev_warn(&pdev->dev, "Cannot register hwmon device\n");
}
}
|
