1 // SPDX-License-Identifier: BSD-3-Clause OR GPL-2.0
2 /* Copyright (c) 2015-2018 Mellanox Technologies. All rights reserved */
3
4 #include <linux/kernel.h>
5 #include <linux/types.h>
6 #include <linux/device.h>
7 #include <linux/sysfs.h>
8 #include <linux/hwmon.h>
9 #include <linux/err.h>
10 #include <linux/sfp.h>
11
12 #include "core.h"
13 #include "core_env.h"
14
15 #define MLXSW_HWMON_SENSORS_MAX_COUNT 64
16 #define MLXSW_HWMON_MODULES_MAX_COUNT 64
17 #define MLXSW_HWMON_GEARBOXES_MAX_COUNT 32
18
19 #define MLXSW_HWMON_ATTR_PER_SENSOR 3
20 #define MLXSW_HWMON_ATTR_PER_MODULE 7
21 #define MLXSW_HWMON_ATTR_PER_GEARBOX 4
22 #define MLXSW_HWMON_DEV_NAME_LEN_MAX 16
23
24 #define MLXSW_HWMON_ATTR_COUNT (MLXSW_HWMON_SENSORS_MAX_COUNT * MLXSW_HWMON_ATTR_PER_SENSOR + \
25 MLXSW_HWMON_MODULES_MAX_COUNT * MLXSW_HWMON_ATTR_PER_MODULE + \
26 MLXSW_HWMON_GEARBOXES_MAX_COUNT * MLXSW_HWMON_ATTR_PER_GEARBOX + \
27 MLXSW_MFCR_TACHOS_MAX + MLXSW_MFCR_PWMS_MAX)
28
29 struct mlxsw_hwmon_attr {
30 struct device_attribute dev_attr;
31 struct mlxsw_hwmon_dev *mlxsw_hwmon_dev;
32 unsigned int type_index;
33 char name[32];
34 };
35
mlxsw_hwmon_get_attr_index(int index,int count)36 static int mlxsw_hwmon_get_attr_index(int index, int count)
37 {
38 if (index >= count)
39 return index % count + MLXSW_REG_MTMP_GBOX_INDEX_MIN;
40
41 return index;
42 }
43
44 struct mlxsw_hwmon_dev {
45 char name[MLXSW_HWMON_DEV_NAME_LEN_MAX];
46 struct mlxsw_hwmon *hwmon;
47 struct device *hwmon_dev;
48 struct attribute_group group;
49 const struct attribute_group *groups[2];
50 struct attribute *attrs[MLXSW_HWMON_ATTR_COUNT + 1];
51 struct mlxsw_hwmon_attr hwmon_attrs[MLXSW_HWMON_ATTR_COUNT];
52 unsigned int attrs_count;
53 u8 sensor_count;
54 u8 module_sensor_max;
55 u8 slot_index;
56 bool active;
57 };
58
59 struct mlxsw_hwmon {
60 struct mlxsw_core *core;
61 const struct mlxsw_bus_info *bus_info;
62 struct mlxsw_hwmon_dev line_cards[];
63 };
64
mlxsw_hwmon_temp_show(struct device * dev,struct device_attribute * attr,char * buf)65 static ssize_t mlxsw_hwmon_temp_show(struct device *dev,
66 struct device_attribute *attr,
67 char *buf)
68 {
69 struct mlxsw_hwmon_attr *mlxsw_hwmon_attr =
70 container_of(attr, struct mlxsw_hwmon_attr, dev_attr);
71 struct mlxsw_hwmon_dev *mlxsw_hwmon_dev = mlxsw_hwmon_attr->mlxsw_hwmon_dev;
72 struct mlxsw_hwmon *mlxsw_hwmon = mlxsw_hwmon_dev->hwmon;
73 char mtmp_pl[MLXSW_REG_MTMP_LEN];
74 int temp, index;
75 int err;
76
77 index = mlxsw_hwmon_get_attr_index(mlxsw_hwmon_attr->type_index,
78 mlxsw_hwmon_dev->module_sensor_max);
79 mlxsw_reg_mtmp_pack(mtmp_pl, mlxsw_hwmon_dev->slot_index, index, false,
80 false);
81 err = mlxsw_reg_query(mlxsw_hwmon->core, MLXSW_REG(mtmp), mtmp_pl);
82 if (err) {
83 dev_err(mlxsw_hwmon->bus_info->dev, "Failed to query temp sensor\n");
84 return err;
85 }
86 mlxsw_reg_mtmp_unpack(mtmp_pl, &temp, NULL, NULL, NULL, NULL);
87 return sprintf(buf, "%d\n", temp);
88 }
89
mlxsw_hwmon_temp_max_show(struct device * dev,struct device_attribute * attr,char * buf)90 static ssize_t mlxsw_hwmon_temp_max_show(struct device *dev,
91 struct device_attribute *attr,
92 char *buf)
93 {
94 struct mlxsw_hwmon_attr *mlxsw_hwmon_attr =
95 container_of(attr, struct mlxsw_hwmon_attr, dev_attr);
96 struct mlxsw_hwmon_dev *mlxsw_hwmon_dev = mlxsw_hwmon_attr->mlxsw_hwmon_dev;
97 struct mlxsw_hwmon *mlxsw_hwmon = mlxsw_hwmon_dev->hwmon;
98 char mtmp_pl[MLXSW_REG_MTMP_LEN];
99 int temp_max, index;
100 int err;
101
102 index = mlxsw_hwmon_get_attr_index(mlxsw_hwmon_attr->type_index,
103 mlxsw_hwmon_dev->module_sensor_max);
104 mlxsw_reg_mtmp_pack(mtmp_pl, mlxsw_hwmon_dev->slot_index, index, false,
105 false);
106 err = mlxsw_reg_query(mlxsw_hwmon->core, MLXSW_REG(mtmp), mtmp_pl);
107 if (err) {
108 dev_err(mlxsw_hwmon->bus_info->dev, "Failed to query temp sensor\n");
109 return err;
110 }
111 mlxsw_reg_mtmp_unpack(mtmp_pl, NULL, &temp_max, NULL, NULL, NULL);
112 return sprintf(buf, "%d\n", temp_max);
113 }
114
mlxsw_hwmon_temp_rst_store(struct device * dev,struct device_attribute * attr,const char * buf,size_t len)115 static ssize_t mlxsw_hwmon_temp_rst_store(struct device *dev,
116 struct device_attribute *attr,
117 const char *buf, size_t len)
118 {
119 struct mlxsw_hwmon_attr *mlxsw_hwmon_attr =
120 container_of(attr, struct mlxsw_hwmon_attr, dev_attr);
121 struct mlxsw_hwmon_dev *mlxsw_hwmon_dev = mlxsw_hwmon_attr->mlxsw_hwmon_dev;
122 struct mlxsw_hwmon *mlxsw_hwmon = mlxsw_hwmon_dev->hwmon;
123 char mtmp_pl[MLXSW_REG_MTMP_LEN];
124 unsigned long val;
125 int index;
126 int err;
127
128 err = kstrtoul(buf, 10, &val);
129 if (err)
130 return err;
131 if (val != 1)
132 return -EINVAL;
133
134 index = mlxsw_hwmon_get_attr_index(mlxsw_hwmon_attr->type_index,
135 mlxsw_hwmon_dev->module_sensor_max);
136
137 mlxsw_reg_mtmp_slot_index_set(mtmp_pl, mlxsw_hwmon_dev->slot_index);
138 mlxsw_reg_mtmp_sensor_index_set(mtmp_pl, index);
139 err = mlxsw_reg_query(mlxsw_hwmon->core, MLXSW_REG(mtmp), mtmp_pl);
140 if (err)
141 return err;
142 mlxsw_reg_mtmp_mte_set(mtmp_pl, true);
143 mlxsw_reg_mtmp_mtr_set(mtmp_pl, true);
144 err = mlxsw_reg_write(mlxsw_hwmon->core, MLXSW_REG(mtmp), mtmp_pl);
145 if (err) {
146 dev_err(mlxsw_hwmon->bus_info->dev, "Failed to reset temp sensor history\n");
147 return err;
148 }
149 return len;
150 }
151
mlxsw_hwmon_fan_rpm_show(struct device * dev,struct device_attribute * attr,char * buf)152 static ssize_t mlxsw_hwmon_fan_rpm_show(struct device *dev,
153 struct device_attribute *attr,
154 char *buf)
155 {
156 struct mlxsw_hwmon_attr *mlxsw_hwmon_attr =
157 container_of(attr, struct mlxsw_hwmon_attr, dev_attr);
158 struct mlxsw_hwmon_dev *mlxsw_hwmon_dev = mlxsw_hwmon_attr->mlxsw_hwmon_dev;
159 struct mlxsw_hwmon *mlxsw_hwmon = mlxsw_hwmon_dev->hwmon;
160 char mfsm_pl[MLXSW_REG_MFSM_LEN];
161 int err;
162
163 mlxsw_reg_mfsm_pack(mfsm_pl, mlxsw_hwmon_attr->type_index);
164 err = mlxsw_reg_query(mlxsw_hwmon->core, MLXSW_REG(mfsm), mfsm_pl);
165 if (err) {
166 dev_err(mlxsw_hwmon->bus_info->dev, "Failed to query fan\n");
167 return err;
168 }
169 return sprintf(buf, "%u\n", mlxsw_reg_mfsm_rpm_get(mfsm_pl));
170 }
171
mlxsw_hwmon_fan_fault_show(struct device * dev,struct device_attribute * attr,char * buf)172 static ssize_t mlxsw_hwmon_fan_fault_show(struct device *dev,
173 struct device_attribute *attr,
174 char *buf)
175 {
176 struct mlxsw_hwmon_attr *mlxsw_hwmon_attr =
177 container_of(attr, struct mlxsw_hwmon_attr, dev_attr);
178 struct mlxsw_hwmon_dev *mlxsw_hwmon_dev = mlxsw_hwmon_attr->mlxsw_hwmon_dev;
179 struct mlxsw_hwmon *mlxsw_hwmon = mlxsw_hwmon_dev->hwmon;
180 char fore_pl[MLXSW_REG_FORE_LEN];
181 bool fault;
182 int err;
183
184 err = mlxsw_reg_query(mlxsw_hwmon->core, MLXSW_REG(fore), fore_pl);
185 if (err) {
186 dev_err(mlxsw_hwmon->bus_info->dev, "Failed to query fan\n");
187 return err;
188 }
189 mlxsw_reg_fore_unpack(fore_pl, mlxsw_hwmon_attr->type_index, &fault);
190
191 return sprintf(buf, "%u\n", fault);
192 }
193
mlxsw_hwmon_pwm_show(struct device * dev,struct device_attribute * attr,char * buf)194 static ssize_t mlxsw_hwmon_pwm_show(struct device *dev,
195 struct device_attribute *attr,
196 char *buf)
197 {
198 struct mlxsw_hwmon_attr *mlxsw_hwmon_attr =
199 container_of(attr, struct mlxsw_hwmon_attr, dev_attr);
200 struct mlxsw_hwmon_dev *mlxsw_hwmon_dev = mlxsw_hwmon_attr->mlxsw_hwmon_dev;
201 struct mlxsw_hwmon *mlxsw_hwmon = mlxsw_hwmon_dev->hwmon;
202 char mfsc_pl[MLXSW_REG_MFSC_LEN];
203 int err;
204
205 mlxsw_reg_mfsc_pack(mfsc_pl, mlxsw_hwmon_attr->type_index, 0);
206 err = mlxsw_reg_query(mlxsw_hwmon->core, MLXSW_REG(mfsc), mfsc_pl);
207 if (err) {
208 dev_err(mlxsw_hwmon->bus_info->dev, "Failed to query PWM\n");
209 return err;
210 }
211 return sprintf(buf, "%u\n",
212 mlxsw_reg_mfsc_pwm_duty_cycle_get(mfsc_pl));
213 }
214
mlxsw_hwmon_pwm_store(struct device * dev,struct device_attribute * attr,const char * buf,size_t len)215 static ssize_t mlxsw_hwmon_pwm_store(struct device *dev,
216 struct device_attribute *attr,
217 const char *buf, size_t len)
218 {
219 struct mlxsw_hwmon_attr *mlxsw_hwmon_attr =
220 container_of(attr, struct mlxsw_hwmon_attr, dev_attr);
221 struct mlxsw_hwmon_dev *mlxsw_hwmon_dev = mlxsw_hwmon_attr->mlxsw_hwmon_dev;
222 struct mlxsw_hwmon *mlxsw_hwmon = mlxsw_hwmon_dev->hwmon;
223 char mfsc_pl[MLXSW_REG_MFSC_LEN];
224 unsigned long val;
225 int err;
226
227 err = kstrtoul(buf, 10, &val);
228 if (err)
229 return err;
230 if (val > 255)
231 return -EINVAL;
232
233 mlxsw_reg_mfsc_pack(mfsc_pl, mlxsw_hwmon_attr->type_index, val);
234 err = mlxsw_reg_write(mlxsw_hwmon->core, MLXSW_REG(mfsc), mfsc_pl);
235 if (err) {
236 dev_err(mlxsw_hwmon->bus_info->dev, "Failed to write PWM\n");
237 return err;
238 }
239 return len;
240 }
241
mlxsw_hwmon_module_temp_get(struct device * dev,struct device_attribute * attr,int * p_temp)242 static int mlxsw_hwmon_module_temp_get(struct device *dev,
243 struct device_attribute *attr,
244 int *p_temp)
245 {
246 struct mlxsw_hwmon_attr *mlxsw_hwmon_attr =
247 container_of(attr, struct mlxsw_hwmon_attr, dev_attr);
248 struct mlxsw_hwmon_dev *mlxsw_hwmon_dev = mlxsw_hwmon_attr->mlxsw_hwmon_dev;
249 struct mlxsw_hwmon *mlxsw_hwmon = mlxsw_hwmon_dev->hwmon;
250 char mtmp_pl[MLXSW_REG_MTMP_LEN];
251 u8 module;
252 int err;
253
254 module = mlxsw_hwmon_attr->type_index - mlxsw_hwmon_dev->sensor_count;
255 mlxsw_reg_mtmp_pack(mtmp_pl, mlxsw_hwmon_dev->slot_index,
256 MLXSW_REG_MTMP_MODULE_INDEX_MIN + module, false,
257 false);
258 err = mlxsw_reg_query(mlxsw_hwmon->core, MLXSW_REG(mtmp), mtmp_pl);
259 if (err) {
260 dev_err(dev, "Failed to query module temperature\n");
261 return err;
262 }
263 mlxsw_reg_mtmp_unpack(mtmp_pl, p_temp, NULL, NULL, NULL, NULL);
264
265 return 0;
266 }
267
mlxsw_hwmon_module_temp_show(struct device * dev,struct device_attribute * attr,char * buf)268 static ssize_t mlxsw_hwmon_module_temp_show(struct device *dev,
269 struct device_attribute *attr,
270 char *buf)
271 {
272 int err, temp;
273
274 err = mlxsw_hwmon_module_temp_get(dev, attr, &temp);
275 if (err)
276 return err;
277
278 return sprintf(buf, "%d\n", temp);
279 }
280
mlxsw_hwmon_module_temp_fault_show(struct device * dev,struct device_attribute * attr,char * buf)281 static ssize_t mlxsw_hwmon_module_temp_fault_show(struct device *dev,
282 struct device_attribute *attr,
283 char *buf)
284 {
285 struct mlxsw_hwmon_attr *mlxsw_hwmon_attr =
286 container_of(attr, struct mlxsw_hwmon_attr, dev_attr);
287 struct mlxsw_hwmon_dev *mlxsw_hwmon_dev = mlxsw_hwmon_attr->mlxsw_hwmon_dev;
288 struct mlxsw_hwmon *mlxsw_hwmon = mlxsw_hwmon_dev->hwmon;
289 char mtbr_pl[MLXSW_REG_MTBR_LEN] = {0};
290 u8 module, fault;
291 u16 temp;
292 int err;
293
294 module = mlxsw_hwmon_attr->type_index - mlxsw_hwmon_dev->sensor_count;
295 mlxsw_reg_mtbr_pack(mtbr_pl, mlxsw_hwmon_dev->slot_index,
296 MLXSW_REG_MTBR_BASE_MODULE_INDEX + module, 1);
297 err = mlxsw_reg_query(mlxsw_hwmon->core, MLXSW_REG(mtbr), mtbr_pl);
298 if (err) {
299 dev_err(dev, "Failed to query module temperature sensor\n");
300 return err;
301 }
302
303 mlxsw_reg_mtbr_temp_unpack(mtbr_pl, 0, &temp, NULL);
304
305 /* Update status and temperature cache. */
306 switch (temp) {
307 case MLXSW_REG_MTBR_BAD_SENS_INFO:
308 /* Untrusted cable is connected. Reading temperature from its
309 * sensor is faulty.
310 */
311 fault = 1;
312 break;
313 case MLXSW_REG_MTBR_NO_CONN:
314 case MLXSW_REG_MTBR_NO_TEMP_SENS:
315 case MLXSW_REG_MTBR_INDEX_NA:
316 default:
317 fault = 0;
318 break;
319 }
320
321 return sprintf(buf, "%u\n", fault);
322 }
323
mlxsw_hwmon_module_temp_critical_get(struct device * dev,struct device_attribute * attr,int * p_temp)324 static int mlxsw_hwmon_module_temp_critical_get(struct device *dev,
325 struct device_attribute *attr,
326 int *p_temp)
327 {
328 struct mlxsw_hwmon_attr *mlxsw_hwmon_attr =
329 container_of(attr, struct mlxsw_hwmon_attr, dev_attr);
330 struct mlxsw_hwmon_dev *mlxsw_hwmon_dev = mlxsw_hwmon_attr->mlxsw_hwmon_dev;
331 struct mlxsw_hwmon *mlxsw_hwmon = mlxsw_hwmon_dev->hwmon;
332 u8 module;
333 int err;
334
335 module = mlxsw_hwmon_attr->type_index - mlxsw_hwmon_dev->sensor_count;
336 err = mlxsw_env_module_temp_thresholds_get(mlxsw_hwmon->core,
337 mlxsw_hwmon_dev->slot_index,
338 module, SFP_TEMP_HIGH_WARN,
339 p_temp);
340 if (err) {
341 dev_err(dev, "Failed to query module temperature thresholds\n");
342 return err;
343 }
344
345 return 0;
346 }
347
348 static ssize_t
mlxsw_hwmon_module_temp_critical_show(struct device * dev,struct device_attribute * attr,char * buf)349 mlxsw_hwmon_module_temp_critical_show(struct device *dev,
350 struct device_attribute *attr, char *buf)
351 {
352 int err, temp;
353
354 err = mlxsw_hwmon_module_temp_critical_get(dev, attr, &temp);
355 if (err)
356 return err;
357
358 return sprintf(buf, "%u\n", temp);
359 }
360
mlxsw_hwmon_module_temp_emergency_get(struct device * dev,struct device_attribute * attr,int * p_temp)361 static int mlxsw_hwmon_module_temp_emergency_get(struct device *dev,
362 struct device_attribute *attr,
363 int *p_temp)
364 {
365 struct mlxsw_hwmon_attr *mlxsw_hwmon_attr =
366 container_of(attr, struct mlxsw_hwmon_attr, dev_attr);
367 struct mlxsw_hwmon_dev *mlxsw_hwmon_dev = mlxsw_hwmon_attr->mlxsw_hwmon_dev;
368 struct mlxsw_hwmon *mlxsw_hwmon = mlxsw_hwmon_dev->hwmon;
369 u8 module;
370 int err;
371
372 module = mlxsw_hwmon_attr->type_index - mlxsw_hwmon_dev->sensor_count;
373 err = mlxsw_env_module_temp_thresholds_get(mlxsw_hwmon->core,
374 mlxsw_hwmon_dev->slot_index,
375 module, SFP_TEMP_HIGH_ALARM,
376 p_temp);
377 if (err) {
378 dev_err(dev, "Failed to query module temperature thresholds\n");
379 return err;
380 }
381
382 return 0;
383 }
384
385 static ssize_t
mlxsw_hwmon_module_temp_emergency_show(struct device * dev,struct device_attribute * attr,char * buf)386 mlxsw_hwmon_module_temp_emergency_show(struct device *dev,
387 struct device_attribute *attr,
388 char *buf)
389 {
390 int err, temp;
391
392 err = mlxsw_hwmon_module_temp_emergency_get(dev, attr, &temp);
393 if (err)
394 return err;
395
396 return sprintf(buf, "%u\n", temp);
397 }
398
399 static ssize_t
mlxsw_hwmon_module_temp_label_show(struct device * dev,struct device_attribute * attr,char * buf)400 mlxsw_hwmon_module_temp_label_show(struct device *dev,
401 struct device_attribute *attr,
402 char *buf)
403 {
404 struct mlxsw_hwmon_attr *mlxsw_hwmon_attr =
405 container_of(attr, struct mlxsw_hwmon_attr, dev_attr);
406
407 return sprintf(buf, "front panel %03u\n",
408 mlxsw_hwmon_attr->type_index + 1 -
409 mlxsw_hwmon_attr->mlxsw_hwmon_dev->sensor_count);
410 }
411
412 static ssize_t
mlxsw_hwmon_gbox_temp_label_show(struct device * dev,struct device_attribute * attr,char * buf)413 mlxsw_hwmon_gbox_temp_label_show(struct device *dev,
414 struct device_attribute *attr,
415 char *buf)
416 {
417 struct mlxsw_hwmon_attr *mlxsw_hwmon_attr =
418 container_of(attr, struct mlxsw_hwmon_attr, dev_attr);
419 struct mlxsw_hwmon_dev *mlxsw_hwmon_dev = mlxsw_hwmon_attr->mlxsw_hwmon_dev;
420 int index = mlxsw_hwmon_attr->type_index -
421 mlxsw_hwmon_dev->module_sensor_max + 1;
422
423 return sprintf(buf, "gearbox %03u\n", index);
424 }
425
mlxsw_hwmon_temp_critical_alarm_show(struct device * dev,struct device_attribute * attr,char * buf)426 static ssize_t mlxsw_hwmon_temp_critical_alarm_show(struct device *dev,
427 struct device_attribute *attr,
428 char *buf)
429 {
430 int err, temp, emergency_temp, critic_temp;
431
432 err = mlxsw_hwmon_module_temp_get(dev, attr, &temp);
433 if (err)
434 return err;
435
436 if (temp <= 0)
437 return sprintf(buf, "%d\n", false);
438
439 err = mlxsw_hwmon_module_temp_emergency_get(dev, attr, &emergency_temp);
440 if (err)
441 return err;
442
443 if (temp >= emergency_temp)
444 return sprintf(buf, "%d\n", false);
445
446 err = mlxsw_hwmon_module_temp_critical_get(dev, attr, &critic_temp);
447 if (err)
448 return err;
449
450 return sprintf(buf, "%d\n", temp >= critic_temp);
451 }
452
mlxsw_hwmon_temp_emergency_alarm_show(struct device * dev,struct device_attribute * attr,char * buf)453 static ssize_t mlxsw_hwmon_temp_emergency_alarm_show(struct device *dev,
454 struct device_attribute *attr,
455 char *buf)
456 {
457 int err, temp, emergency_temp;
458
459 err = mlxsw_hwmon_module_temp_get(dev, attr, &temp);
460 if (err)
461 return err;
462
463 if (temp <= 0)
464 return sprintf(buf, "%d\n", false);
465
466 err = mlxsw_hwmon_module_temp_emergency_get(dev, attr, &emergency_temp);
467 if (err)
468 return err;
469
470 return sprintf(buf, "%d\n", temp >= emergency_temp);
471 }
472
473 enum mlxsw_hwmon_attr_type {
474 MLXSW_HWMON_ATTR_TYPE_TEMP,
475 MLXSW_HWMON_ATTR_TYPE_TEMP_MAX,
476 MLXSW_HWMON_ATTR_TYPE_TEMP_RST,
477 MLXSW_HWMON_ATTR_TYPE_FAN_RPM,
478 MLXSW_HWMON_ATTR_TYPE_FAN_FAULT,
479 MLXSW_HWMON_ATTR_TYPE_PWM,
480 MLXSW_HWMON_ATTR_TYPE_TEMP_MODULE,
481 MLXSW_HWMON_ATTR_TYPE_TEMP_MODULE_FAULT,
482 MLXSW_HWMON_ATTR_TYPE_TEMP_MODULE_CRIT,
483 MLXSW_HWMON_ATTR_TYPE_TEMP_MODULE_EMERG,
484 MLXSW_HWMON_ATTR_TYPE_TEMP_MODULE_LABEL,
485 MLXSW_HWMON_ATTR_TYPE_TEMP_GBOX_LABEL,
486 MLXSW_HWMON_ATTR_TYPE_TEMP_CRIT_ALARM,
487 MLXSW_HWMON_ATTR_TYPE_TEMP_EMERGENCY_ALARM,
488 };
489
mlxsw_hwmon_attr_add(struct mlxsw_hwmon_dev * mlxsw_hwmon_dev,enum mlxsw_hwmon_attr_type attr_type,unsigned int type_index,unsigned int num)490 static void mlxsw_hwmon_attr_add(struct mlxsw_hwmon_dev *mlxsw_hwmon_dev,
491 enum mlxsw_hwmon_attr_type attr_type,
492 unsigned int type_index, unsigned int num)
493 {
494 struct mlxsw_hwmon_attr *mlxsw_hwmon_attr;
495 unsigned int attr_index;
496
497 attr_index = mlxsw_hwmon_dev->attrs_count;
498 mlxsw_hwmon_attr = &mlxsw_hwmon_dev->hwmon_attrs[attr_index];
499
500 switch (attr_type) {
501 case MLXSW_HWMON_ATTR_TYPE_TEMP:
502 mlxsw_hwmon_attr->dev_attr.show = mlxsw_hwmon_temp_show;
503 mlxsw_hwmon_attr->dev_attr.attr.mode = 0444;
504 snprintf(mlxsw_hwmon_attr->name, sizeof(mlxsw_hwmon_attr->name),
505 "temp%u_input", num + 1);
506 break;
507 case MLXSW_HWMON_ATTR_TYPE_TEMP_MAX:
508 mlxsw_hwmon_attr->dev_attr.show = mlxsw_hwmon_temp_max_show;
509 mlxsw_hwmon_attr->dev_attr.attr.mode = 0444;
510 snprintf(mlxsw_hwmon_attr->name, sizeof(mlxsw_hwmon_attr->name),
511 "temp%u_highest", num + 1);
512 break;
513 case MLXSW_HWMON_ATTR_TYPE_TEMP_RST:
514 mlxsw_hwmon_attr->dev_attr.store = mlxsw_hwmon_temp_rst_store;
515 mlxsw_hwmon_attr->dev_attr.attr.mode = 0200;
516 snprintf(mlxsw_hwmon_attr->name, sizeof(mlxsw_hwmon_attr->name),
517 "temp%u_reset_history", num + 1);
518 break;
519 case MLXSW_HWMON_ATTR_TYPE_FAN_RPM:
520 mlxsw_hwmon_attr->dev_attr.show = mlxsw_hwmon_fan_rpm_show;
521 mlxsw_hwmon_attr->dev_attr.attr.mode = 0444;
522 snprintf(mlxsw_hwmon_attr->name, sizeof(mlxsw_hwmon_attr->name),
523 "fan%u_input", num + 1);
524 break;
525 case MLXSW_HWMON_ATTR_TYPE_FAN_FAULT:
526 mlxsw_hwmon_attr->dev_attr.show = mlxsw_hwmon_fan_fault_show;
527 mlxsw_hwmon_attr->dev_attr.attr.mode = 0444;
528 snprintf(mlxsw_hwmon_attr->name, sizeof(mlxsw_hwmon_attr->name),
529 "fan%u_fault", num + 1);
530 break;
531 case MLXSW_HWMON_ATTR_TYPE_PWM:
532 mlxsw_hwmon_attr->dev_attr.show = mlxsw_hwmon_pwm_show;
533 mlxsw_hwmon_attr->dev_attr.store = mlxsw_hwmon_pwm_store;
534 mlxsw_hwmon_attr->dev_attr.attr.mode = 0644;
535 snprintf(mlxsw_hwmon_attr->name, sizeof(mlxsw_hwmon_attr->name),
536 "pwm%u", num + 1);
537 break;
538 case MLXSW_HWMON_ATTR_TYPE_TEMP_MODULE:
539 mlxsw_hwmon_attr->dev_attr.show = mlxsw_hwmon_module_temp_show;
540 mlxsw_hwmon_attr->dev_attr.attr.mode = 0444;
541 snprintf(mlxsw_hwmon_attr->name, sizeof(mlxsw_hwmon_attr->name),
542 "temp%u_input", num + 1);
543 break;
544 case MLXSW_HWMON_ATTR_TYPE_TEMP_MODULE_FAULT:
545 mlxsw_hwmon_attr->dev_attr.show =
546 mlxsw_hwmon_module_temp_fault_show;
547 mlxsw_hwmon_attr->dev_attr.attr.mode = 0444;
548 snprintf(mlxsw_hwmon_attr->name, sizeof(mlxsw_hwmon_attr->name),
549 "temp%u_fault", num + 1);
550 break;
551 case MLXSW_HWMON_ATTR_TYPE_TEMP_MODULE_CRIT:
552 mlxsw_hwmon_attr->dev_attr.show =
553 mlxsw_hwmon_module_temp_critical_show;
554 mlxsw_hwmon_attr->dev_attr.attr.mode = 0444;
555 snprintf(mlxsw_hwmon_attr->name, sizeof(mlxsw_hwmon_attr->name),
556 "temp%u_crit", num + 1);
557 break;
558 case MLXSW_HWMON_ATTR_TYPE_TEMP_MODULE_EMERG:
559 mlxsw_hwmon_attr->dev_attr.show =
560 mlxsw_hwmon_module_temp_emergency_show;
561 mlxsw_hwmon_attr->dev_attr.attr.mode = 0444;
562 snprintf(mlxsw_hwmon_attr->name, sizeof(mlxsw_hwmon_attr->name),
563 "temp%u_emergency", num + 1);
564 break;
565 case MLXSW_HWMON_ATTR_TYPE_TEMP_MODULE_LABEL:
566 mlxsw_hwmon_attr->dev_attr.show =
567 mlxsw_hwmon_module_temp_label_show;
568 mlxsw_hwmon_attr->dev_attr.attr.mode = 0444;
569 snprintf(mlxsw_hwmon_attr->name, sizeof(mlxsw_hwmon_attr->name),
570 "temp%u_label", num + 1);
571 break;
572 case MLXSW_HWMON_ATTR_TYPE_TEMP_GBOX_LABEL:
573 mlxsw_hwmon_attr->dev_attr.show =
574 mlxsw_hwmon_gbox_temp_label_show;
575 mlxsw_hwmon_attr->dev_attr.attr.mode = 0444;
576 snprintf(mlxsw_hwmon_attr->name, sizeof(mlxsw_hwmon_attr->name),
577 "temp%u_label", num + 1);
578 break;
579 case MLXSW_HWMON_ATTR_TYPE_TEMP_CRIT_ALARM:
580 mlxsw_hwmon_attr->dev_attr.show =
581 mlxsw_hwmon_temp_critical_alarm_show;
582 mlxsw_hwmon_attr->dev_attr.attr.mode = 0444;
583 snprintf(mlxsw_hwmon_attr->name, sizeof(mlxsw_hwmon_attr->name),
584 "temp%u_crit_alarm", num + 1);
585 break;
586 case MLXSW_HWMON_ATTR_TYPE_TEMP_EMERGENCY_ALARM:
587 mlxsw_hwmon_attr->dev_attr.show =
588 mlxsw_hwmon_temp_emergency_alarm_show;
589 mlxsw_hwmon_attr->dev_attr.attr.mode = 0444;
590 snprintf(mlxsw_hwmon_attr->name, sizeof(mlxsw_hwmon_attr->name),
591 "temp%u_emergency_alarm", num + 1);
592 break;
593 default:
594 WARN_ON(1);
595 }
596
597 mlxsw_hwmon_attr->type_index = type_index;
598 mlxsw_hwmon_attr->mlxsw_hwmon_dev = mlxsw_hwmon_dev;
599 mlxsw_hwmon_attr->dev_attr.attr.name = mlxsw_hwmon_attr->name;
600 sysfs_attr_init(&mlxsw_hwmon_attr->dev_attr.attr);
601
602 mlxsw_hwmon_dev->attrs[attr_index] = &mlxsw_hwmon_attr->dev_attr.attr;
603 mlxsw_hwmon_dev->attrs_count++;
604 }
605
mlxsw_hwmon_temp_init(struct mlxsw_hwmon_dev * mlxsw_hwmon_dev)606 static int mlxsw_hwmon_temp_init(struct mlxsw_hwmon_dev *mlxsw_hwmon_dev)
607 {
608 struct mlxsw_hwmon *mlxsw_hwmon = mlxsw_hwmon_dev->hwmon;
609 char mtcap_pl[MLXSW_REG_MTCAP_LEN] = {0};
610 int i;
611 int err;
612
613 err = mlxsw_reg_query(mlxsw_hwmon->core, MLXSW_REG(mtcap), mtcap_pl);
614 if (err) {
615 dev_err(mlxsw_hwmon->bus_info->dev, "Failed to get number of temp sensors\n");
616 return err;
617 }
618 mlxsw_hwmon_dev->sensor_count = mlxsw_reg_mtcap_sensor_count_get(mtcap_pl);
619 for (i = 0; i < mlxsw_hwmon_dev->sensor_count; i++) {
620 char mtmp_pl[MLXSW_REG_MTMP_LEN] = {0};
621
622 mlxsw_reg_mtmp_slot_index_set(mtmp_pl,
623 mlxsw_hwmon_dev->slot_index);
624 mlxsw_reg_mtmp_sensor_index_set(mtmp_pl, i);
625 err = mlxsw_reg_query(mlxsw_hwmon->core, MLXSW_REG(mtmp),
626 mtmp_pl);
627 if (err)
628 return err;
629 mlxsw_reg_mtmp_mte_set(mtmp_pl, true);
630 mlxsw_reg_mtmp_mtr_set(mtmp_pl, true);
631 err = mlxsw_reg_write(mlxsw_hwmon->core,
632 MLXSW_REG(mtmp), mtmp_pl);
633 if (err) {
634 dev_err(mlxsw_hwmon->bus_info->dev, "Failed to setup temp sensor number %d\n",
635 i);
636 return err;
637 }
638 mlxsw_hwmon_attr_add(mlxsw_hwmon_dev,
639 MLXSW_HWMON_ATTR_TYPE_TEMP, i, i);
640 mlxsw_hwmon_attr_add(mlxsw_hwmon_dev,
641 MLXSW_HWMON_ATTR_TYPE_TEMP_MAX, i, i);
642 mlxsw_hwmon_attr_add(mlxsw_hwmon_dev,
643 MLXSW_HWMON_ATTR_TYPE_TEMP_RST, i, i);
644 }
645 return 0;
646 }
647
mlxsw_hwmon_fans_init(struct mlxsw_hwmon_dev * mlxsw_hwmon_dev)648 static int mlxsw_hwmon_fans_init(struct mlxsw_hwmon_dev *mlxsw_hwmon_dev)
649 {
650 struct mlxsw_hwmon *mlxsw_hwmon = mlxsw_hwmon_dev->hwmon;
651 char mfcr_pl[MLXSW_REG_MFCR_LEN] = {0};
652 enum mlxsw_reg_mfcr_pwm_frequency freq;
653 unsigned int type_index;
654 unsigned int num;
655 u16 tacho_active;
656 u8 pwm_active;
657 int err;
658
659 err = mlxsw_reg_query(mlxsw_hwmon->core, MLXSW_REG(mfcr), mfcr_pl);
660 if (err) {
661 dev_err(mlxsw_hwmon->bus_info->dev, "Failed to get to probe PWMs and Tachometers\n");
662 return err;
663 }
664 mlxsw_reg_mfcr_unpack(mfcr_pl, &freq, &tacho_active, &pwm_active);
665 num = 0;
666 for (type_index = 0; type_index < MLXSW_MFCR_TACHOS_MAX; type_index++) {
667 if (tacho_active & BIT(type_index)) {
668 mlxsw_hwmon_attr_add(mlxsw_hwmon_dev,
669 MLXSW_HWMON_ATTR_TYPE_FAN_RPM,
670 type_index, num);
671 mlxsw_hwmon_attr_add(mlxsw_hwmon_dev,
672 MLXSW_HWMON_ATTR_TYPE_FAN_FAULT,
673 type_index, num++);
674 }
675 }
676 num = 0;
677 for (type_index = 0; type_index < MLXSW_MFCR_PWMS_MAX; type_index++) {
678 if (pwm_active & BIT(type_index))
679 mlxsw_hwmon_attr_add(mlxsw_hwmon_dev,
680 MLXSW_HWMON_ATTR_TYPE_PWM,
681 type_index, num++);
682 }
683 return 0;
684 }
685
mlxsw_hwmon_module_init(struct mlxsw_hwmon_dev * mlxsw_hwmon_dev)686 static int mlxsw_hwmon_module_init(struct mlxsw_hwmon_dev *mlxsw_hwmon_dev)
687 {
688 struct mlxsw_hwmon *mlxsw_hwmon = mlxsw_hwmon_dev->hwmon;
689 char mgpir_pl[MLXSW_REG_MGPIR_LEN];
690 u8 module_sensor_max;
691 int i, err;
692
693 mlxsw_reg_mgpir_pack(mgpir_pl, mlxsw_hwmon_dev->slot_index);
694 err = mlxsw_reg_query(mlxsw_hwmon->core, MLXSW_REG(mgpir), mgpir_pl);
695 if (err)
696 return err;
697
698 mlxsw_reg_mgpir_unpack(mgpir_pl, NULL, NULL, NULL,
699 &module_sensor_max, NULL);
700
701 /* Add extra attributes for module temperature. Sensor index is
702 * assigned to sensor_count value, while all indexed before
703 * sensor_count are already utilized by the sensors connected through
704 * mtmp register by mlxsw_hwmon_temp_init().
705 */
706 mlxsw_hwmon_dev->module_sensor_max = mlxsw_hwmon_dev->sensor_count +
707 module_sensor_max;
708 for (i = mlxsw_hwmon_dev->sensor_count;
709 i < mlxsw_hwmon_dev->module_sensor_max; i++) {
710 mlxsw_hwmon_attr_add(mlxsw_hwmon_dev,
711 MLXSW_HWMON_ATTR_TYPE_TEMP_MODULE, i, i);
712 mlxsw_hwmon_attr_add(mlxsw_hwmon_dev,
713 MLXSW_HWMON_ATTR_TYPE_TEMP_MODULE_FAULT,
714 i, i);
715 mlxsw_hwmon_attr_add(mlxsw_hwmon_dev,
716 MLXSW_HWMON_ATTR_TYPE_TEMP_MODULE_CRIT, i,
717 i);
718 mlxsw_hwmon_attr_add(mlxsw_hwmon_dev,
719 MLXSW_HWMON_ATTR_TYPE_TEMP_MODULE_EMERG,
720 i, i);
721 mlxsw_hwmon_attr_add(mlxsw_hwmon_dev,
722 MLXSW_HWMON_ATTR_TYPE_TEMP_MODULE_LABEL,
723 i, i);
724 mlxsw_hwmon_attr_add(mlxsw_hwmon_dev,
725 MLXSW_HWMON_ATTR_TYPE_TEMP_CRIT_ALARM,
726 i, i);
727 mlxsw_hwmon_attr_add(mlxsw_hwmon_dev,
728 MLXSW_HWMON_ATTR_TYPE_TEMP_EMERGENCY_ALARM,
729 i, i);
730 }
731
732 return 0;
733 }
734
mlxsw_hwmon_gearbox_init(struct mlxsw_hwmon_dev * mlxsw_hwmon_dev)735 static int mlxsw_hwmon_gearbox_init(struct mlxsw_hwmon_dev *mlxsw_hwmon_dev)
736 {
737 struct mlxsw_hwmon *mlxsw_hwmon = mlxsw_hwmon_dev->hwmon;
738 enum mlxsw_reg_mgpir_device_type device_type;
739 int index, max_index, sensor_index;
740 char mgpir_pl[MLXSW_REG_MGPIR_LEN];
741 char mtmp_pl[MLXSW_REG_MTMP_LEN];
742 u8 gbox_num;
743 int err;
744
745 mlxsw_reg_mgpir_pack(mgpir_pl, mlxsw_hwmon_dev->slot_index);
746 err = mlxsw_reg_query(mlxsw_hwmon->core, MLXSW_REG(mgpir), mgpir_pl);
747 if (err)
748 return err;
749
750 mlxsw_reg_mgpir_unpack(mgpir_pl, &gbox_num, &device_type, NULL, NULL,
751 NULL);
752 if (device_type != MLXSW_REG_MGPIR_DEVICE_TYPE_GEARBOX_DIE ||
753 !gbox_num)
754 return 0;
755
756 index = mlxsw_hwmon_dev->module_sensor_max;
757 max_index = mlxsw_hwmon_dev->module_sensor_max + gbox_num;
758 while (index < max_index) {
759 sensor_index = index % mlxsw_hwmon_dev->module_sensor_max +
760 MLXSW_REG_MTMP_GBOX_INDEX_MIN;
761 mlxsw_reg_mtmp_pack(mtmp_pl, mlxsw_hwmon_dev->slot_index,
762 sensor_index, true, true);
763 err = mlxsw_reg_write(mlxsw_hwmon->core,
764 MLXSW_REG(mtmp), mtmp_pl);
765 if (err) {
766 dev_err(mlxsw_hwmon->bus_info->dev, "Failed to setup temp sensor number %d\n",
767 sensor_index);
768 return err;
769 }
770 mlxsw_hwmon_attr_add(mlxsw_hwmon_dev,
771 MLXSW_HWMON_ATTR_TYPE_TEMP, index, index);
772 mlxsw_hwmon_attr_add(mlxsw_hwmon_dev,
773 MLXSW_HWMON_ATTR_TYPE_TEMP_MAX, index,
774 index);
775 mlxsw_hwmon_attr_add(mlxsw_hwmon_dev,
776 MLXSW_HWMON_ATTR_TYPE_TEMP_RST, index,
777 index);
778 mlxsw_hwmon_attr_add(mlxsw_hwmon_dev,
779 MLXSW_HWMON_ATTR_TYPE_TEMP_GBOX_LABEL,
780 index, index);
781 index++;
782 }
783
784 return 0;
785 }
786
787 static void
mlxsw_hwmon_got_active(struct mlxsw_core * mlxsw_core,u8 slot_index,void * priv)788 mlxsw_hwmon_got_active(struct mlxsw_core *mlxsw_core, u8 slot_index,
789 void *priv)
790 {
791 struct mlxsw_hwmon *hwmon = priv;
792 struct mlxsw_hwmon_dev *linecard;
793 struct device *dev;
794 int err;
795
796 dev = hwmon->bus_info->dev;
797 linecard = &hwmon->line_cards[slot_index];
798 if (linecard->active)
799 return;
800 /* For the main board, module sensor indexes start from 1, sensor index
801 * 0 is used for the ASIC. Use the same numbering for line cards.
802 */
803 linecard->sensor_count = 1;
804 linecard->slot_index = slot_index;
805 linecard->hwmon = hwmon;
806 err = mlxsw_hwmon_module_init(linecard);
807 if (err) {
808 dev_err(dev, "Failed to configure hwmon objects for line card modules in slot %d\n",
809 slot_index);
810 return;
811 }
812
813 err = mlxsw_hwmon_gearbox_init(linecard);
814 if (err) {
815 dev_err(dev, "Failed to configure hwmon objects for line card gearboxes in slot %d\n",
816 slot_index);
817 return;
818 }
819
820 linecard->groups[0] = &linecard->group;
821 linecard->group.attrs = linecard->attrs;
822 sprintf(linecard->name, "%s#%02u", "linecard", slot_index);
823 linecard->hwmon_dev =
824 hwmon_device_register_with_groups(dev, linecard->name,
825 linecard, linecard->groups);
826 if (IS_ERR(linecard->hwmon_dev)) {
827 dev_err(dev, "Failed to register hwmon objects for line card in slot %d\n",
828 slot_index);
829 return;
830 }
831
832 linecard->active = true;
833 }
834
835 static void
mlxsw_hwmon_got_inactive(struct mlxsw_core * mlxsw_core,u8 slot_index,void * priv)836 mlxsw_hwmon_got_inactive(struct mlxsw_core *mlxsw_core, u8 slot_index,
837 void *priv)
838 {
839 struct mlxsw_hwmon *hwmon = priv;
840 struct mlxsw_hwmon_dev *linecard;
841
842 linecard = &hwmon->line_cards[slot_index];
843 if (!linecard->active)
844 return;
845 linecard->active = false;
846 hwmon_device_unregister(linecard->hwmon_dev);
847 /* Reset attributes counter */
848 linecard->attrs_count = 0;
849 }
850
851 static struct mlxsw_linecards_event_ops mlxsw_hwmon_event_ops = {
852 .got_active = mlxsw_hwmon_got_active,
853 .got_inactive = mlxsw_hwmon_got_inactive,
854 };
855
mlxsw_hwmon_init(struct mlxsw_core * mlxsw_core,const struct mlxsw_bus_info * mlxsw_bus_info,struct mlxsw_hwmon ** p_hwmon)856 int mlxsw_hwmon_init(struct mlxsw_core *mlxsw_core,
857 const struct mlxsw_bus_info *mlxsw_bus_info,
858 struct mlxsw_hwmon **p_hwmon)
859 {
860 char mgpir_pl[MLXSW_REG_MGPIR_LEN];
861 struct mlxsw_hwmon *mlxsw_hwmon;
862 struct device *hwmon_dev;
863 u8 num_of_slots;
864 int err;
865
866 mlxsw_reg_mgpir_pack(mgpir_pl, 0);
867 err = mlxsw_reg_query(mlxsw_core, MLXSW_REG(mgpir), mgpir_pl);
868 if (err)
869 return err;
870
871 mlxsw_reg_mgpir_unpack(mgpir_pl, NULL, NULL, NULL, NULL,
872 &num_of_slots);
873
874 mlxsw_hwmon = kzalloc(struct_size(mlxsw_hwmon, line_cards,
875 num_of_slots + 1), GFP_KERNEL);
876 if (!mlxsw_hwmon)
877 return -ENOMEM;
878
879 mlxsw_hwmon->core = mlxsw_core;
880 mlxsw_hwmon->bus_info = mlxsw_bus_info;
881 mlxsw_hwmon->line_cards[0].hwmon = mlxsw_hwmon;
882 mlxsw_hwmon->line_cards[0].slot_index = 0;
883
884 err = mlxsw_hwmon_temp_init(&mlxsw_hwmon->line_cards[0]);
885 if (err)
886 goto err_temp_init;
887
888 err = mlxsw_hwmon_fans_init(&mlxsw_hwmon->line_cards[0]);
889 if (err)
890 goto err_fans_init;
891
892 err = mlxsw_hwmon_module_init(&mlxsw_hwmon->line_cards[0]);
893 if (err)
894 goto err_temp_module_init;
895
896 err = mlxsw_hwmon_gearbox_init(&mlxsw_hwmon->line_cards[0]);
897 if (err)
898 goto err_temp_gearbox_init;
899
900 mlxsw_hwmon->line_cards[0].groups[0] = &mlxsw_hwmon->line_cards[0].group;
901 mlxsw_hwmon->line_cards[0].group.attrs = mlxsw_hwmon->line_cards[0].attrs;
902
903 hwmon_dev = hwmon_device_register_with_groups(mlxsw_bus_info->dev,
904 "mlxsw",
905 &mlxsw_hwmon->line_cards[0],
906 mlxsw_hwmon->line_cards[0].groups);
907 if (IS_ERR(hwmon_dev)) {
908 err = PTR_ERR(hwmon_dev);
909 goto err_hwmon_register;
910 }
911
912 err = mlxsw_linecards_event_ops_register(mlxsw_hwmon->core,
913 &mlxsw_hwmon_event_ops,
914 mlxsw_hwmon);
915 if (err)
916 goto err_linecards_event_ops_register;
917
918 mlxsw_hwmon->line_cards[0].hwmon_dev = hwmon_dev;
919 mlxsw_hwmon->line_cards[0].active = true;
920 *p_hwmon = mlxsw_hwmon;
921 return 0;
922
923 err_linecards_event_ops_register:
924 hwmon_device_unregister(mlxsw_hwmon->line_cards[0].hwmon_dev);
925 err_hwmon_register:
926 err_temp_gearbox_init:
927 err_temp_module_init:
928 err_fans_init:
929 err_temp_init:
930 kfree(mlxsw_hwmon);
931 return err;
932 }
933
mlxsw_hwmon_fini(struct mlxsw_hwmon * mlxsw_hwmon)934 void mlxsw_hwmon_fini(struct mlxsw_hwmon *mlxsw_hwmon)
935 {
936 mlxsw_hwmon->line_cards[0].active = false;
937 mlxsw_linecards_event_ops_unregister(mlxsw_hwmon->core,
938 &mlxsw_hwmon_event_ops, mlxsw_hwmon);
939 hwmon_device_unregister(mlxsw_hwmon->line_cards[0].hwmon_dev);
940 kfree(mlxsw_hwmon);
941 }
942