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);
409 }
410
411 static ssize_t
mlxsw_hwmon_gbox_temp_label_show(struct device * dev,struct device_attribute * attr,char * buf)412 mlxsw_hwmon_gbox_temp_label_show(struct device *dev,
413 struct device_attribute *attr,
414 char *buf)
415 {
416 struct mlxsw_hwmon_attr *mlxsw_hwmon_attr =
417 container_of(attr, struct mlxsw_hwmon_attr, dev_attr);
418 struct mlxsw_hwmon_dev *mlxsw_hwmon_dev = mlxsw_hwmon_attr->mlxsw_hwmon_dev;
419 int index = mlxsw_hwmon_attr->type_index -
420 mlxsw_hwmon_dev->module_sensor_max + 1;
421
422 return sprintf(buf, "gearbox %03u\n", index);
423 }
424
mlxsw_hwmon_temp_critical_alarm_show(struct device * dev,struct device_attribute * attr,char * buf)425 static ssize_t mlxsw_hwmon_temp_critical_alarm_show(struct device *dev,
426 struct device_attribute *attr,
427 char *buf)
428 {
429 int err, temp, emergency_temp, critic_temp;
430
431 err = mlxsw_hwmon_module_temp_get(dev, attr, &temp);
432 if (err)
433 return err;
434
435 if (temp <= 0)
436 return sprintf(buf, "%d\n", false);
437
438 err = mlxsw_hwmon_module_temp_emergency_get(dev, attr, &emergency_temp);
439 if (err)
440 return err;
441
442 if (temp >= emergency_temp)
443 return sprintf(buf, "%d\n", false);
444
445 err = mlxsw_hwmon_module_temp_critical_get(dev, attr, &critic_temp);
446 if (err)
447 return err;
448
449 return sprintf(buf, "%d\n", temp >= critic_temp);
450 }
451
mlxsw_hwmon_temp_emergency_alarm_show(struct device * dev,struct device_attribute * attr,char * buf)452 static ssize_t mlxsw_hwmon_temp_emergency_alarm_show(struct device *dev,
453 struct device_attribute *attr,
454 char *buf)
455 {
456 int err, temp, emergency_temp;
457
458 err = mlxsw_hwmon_module_temp_get(dev, attr, &temp);
459 if (err)
460 return err;
461
462 if (temp <= 0)
463 return sprintf(buf, "%d\n", false);
464
465 err = mlxsw_hwmon_module_temp_emergency_get(dev, attr, &emergency_temp);
466 if (err)
467 return err;
468
469 return sprintf(buf, "%d\n", temp >= emergency_temp);
470 }
471
472 enum mlxsw_hwmon_attr_type {
473 MLXSW_HWMON_ATTR_TYPE_TEMP,
474 MLXSW_HWMON_ATTR_TYPE_TEMP_MAX,
475 MLXSW_HWMON_ATTR_TYPE_TEMP_RST,
476 MLXSW_HWMON_ATTR_TYPE_FAN_RPM,
477 MLXSW_HWMON_ATTR_TYPE_FAN_FAULT,
478 MLXSW_HWMON_ATTR_TYPE_PWM,
479 MLXSW_HWMON_ATTR_TYPE_TEMP_MODULE,
480 MLXSW_HWMON_ATTR_TYPE_TEMP_MODULE_FAULT,
481 MLXSW_HWMON_ATTR_TYPE_TEMP_MODULE_CRIT,
482 MLXSW_HWMON_ATTR_TYPE_TEMP_MODULE_EMERG,
483 MLXSW_HWMON_ATTR_TYPE_TEMP_MODULE_LABEL,
484 MLXSW_HWMON_ATTR_TYPE_TEMP_GBOX_LABEL,
485 MLXSW_HWMON_ATTR_TYPE_TEMP_CRIT_ALARM,
486 MLXSW_HWMON_ATTR_TYPE_TEMP_EMERGENCY_ALARM,
487 };
488
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)489 static void mlxsw_hwmon_attr_add(struct mlxsw_hwmon_dev *mlxsw_hwmon_dev,
490 enum mlxsw_hwmon_attr_type attr_type,
491 unsigned int type_index, unsigned int num)
492 {
493 struct mlxsw_hwmon_attr *mlxsw_hwmon_attr;
494 unsigned int attr_index;
495
496 attr_index = mlxsw_hwmon_dev->attrs_count;
497 mlxsw_hwmon_attr = &mlxsw_hwmon_dev->hwmon_attrs[attr_index];
498
499 switch (attr_type) {
500 case MLXSW_HWMON_ATTR_TYPE_TEMP:
501 mlxsw_hwmon_attr->dev_attr.show = mlxsw_hwmon_temp_show;
502 mlxsw_hwmon_attr->dev_attr.attr.mode = 0444;
503 snprintf(mlxsw_hwmon_attr->name, sizeof(mlxsw_hwmon_attr->name),
504 "temp%u_input", num + 1);
505 break;
506 case MLXSW_HWMON_ATTR_TYPE_TEMP_MAX:
507 mlxsw_hwmon_attr->dev_attr.show = mlxsw_hwmon_temp_max_show;
508 mlxsw_hwmon_attr->dev_attr.attr.mode = 0444;
509 snprintf(mlxsw_hwmon_attr->name, sizeof(mlxsw_hwmon_attr->name),
510 "temp%u_highest", num + 1);
511 break;
512 case MLXSW_HWMON_ATTR_TYPE_TEMP_RST:
513 mlxsw_hwmon_attr->dev_attr.store = mlxsw_hwmon_temp_rst_store;
514 mlxsw_hwmon_attr->dev_attr.attr.mode = 0200;
515 snprintf(mlxsw_hwmon_attr->name, sizeof(mlxsw_hwmon_attr->name),
516 "temp%u_reset_history", num + 1);
517 break;
518 case MLXSW_HWMON_ATTR_TYPE_FAN_RPM:
519 mlxsw_hwmon_attr->dev_attr.show = mlxsw_hwmon_fan_rpm_show;
520 mlxsw_hwmon_attr->dev_attr.attr.mode = 0444;
521 snprintf(mlxsw_hwmon_attr->name, sizeof(mlxsw_hwmon_attr->name),
522 "fan%u_input", num + 1);
523 break;
524 case MLXSW_HWMON_ATTR_TYPE_FAN_FAULT:
525 mlxsw_hwmon_attr->dev_attr.show = mlxsw_hwmon_fan_fault_show;
526 mlxsw_hwmon_attr->dev_attr.attr.mode = 0444;
527 snprintf(mlxsw_hwmon_attr->name, sizeof(mlxsw_hwmon_attr->name),
528 "fan%u_fault", num + 1);
529 break;
530 case MLXSW_HWMON_ATTR_TYPE_PWM:
531 mlxsw_hwmon_attr->dev_attr.show = mlxsw_hwmon_pwm_show;
532 mlxsw_hwmon_attr->dev_attr.store = mlxsw_hwmon_pwm_store;
533 mlxsw_hwmon_attr->dev_attr.attr.mode = 0644;
534 snprintf(mlxsw_hwmon_attr->name, sizeof(mlxsw_hwmon_attr->name),
535 "pwm%u", num + 1);
536 break;
537 case MLXSW_HWMON_ATTR_TYPE_TEMP_MODULE:
538 mlxsw_hwmon_attr->dev_attr.show = mlxsw_hwmon_module_temp_show;
539 mlxsw_hwmon_attr->dev_attr.attr.mode = 0444;
540 snprintf(mlxsw_hwmon_attr->name, sizeof(mlxsw_hwmon_attr->name),
541 "temp%u_input", num + 1);
542 break;
543 case MLXSW_HWMON_ATTR_TYPE_TEMP_MODULE_FAULT:
544 mlxsw_hwmon_attr->dev_attr.show =
545 mlxsw_hwmon_module_temp_fault_show;
546 mlxsw_hwmon_attr->dev_attr.attr.mode = 0444;
547 snprintf(mlxsw_hwmon_attr->name, sizeof(mlxsw_hwmon_attr->name),
548 "temp%u_fault", num + 1);
549 break;
550 case MLXSW_HWMON_ATTR_TYPE_TEMP_MODULE_CRIT:
551 mlxsw_hwmon_attr->dev_attr.show =
552 mlxsw_hwmon_module_temp_critical_show;
553 mlxsw_hwmon_attr->dev_attr.attr.mode = 0444;
554 snprintf(mlxsw_hwmon_attr->name, sizeof(mlxsw_hwmon_attr->name),
555 "temp%u_crit", num + 1);
556 break;
557 case MLXSW_HWMON_ATTR_TYPE_TEMP_MODULE_EMERG:
558 mlxsw_hwmon_attr->dev_attr.show =
559 mlxsw_hwmon_module_temp_emergency_show;
560 mlxsw_hwmon_attr->dev_attr.attr.mode = 0444;
561 snprintf(mlxsw_hwmon_attr->name, sizeof(mlxsw_hwmon_attr->name),
562 "temp%u_emergency", num + 1);
563 break;
564 case MLXSW_HWMON_ATTR_TYPE_TEMP_MODULE_LABEL:
565 mlxsw_hwmon_attr->dev_attr.show =
566 mlxsw_hwmon_module_temp_label_show;
567 mlxsw_hwmon_attr->dev_attr.attr.mode = 0444;
568 snprintf(mlxsw_hwmon_attr->name, sizeof(mlxsw_hwmon_attr->name),
569 "temp%u_label", num + 1);
570 break;
571 case MLXSW_HWMON_ATTR_TYPE_TEMP_GBOX_LABEL:
572 mlxsw_hwmon_attr->dev_attr.show =
573 mlxsw_hwmon_gbox_temp_label_show;
574 mlxsw_hwmon_attr->dev_attr.attr.mode = 0444;
575 snprintf(mlxsw_hwmon_attr->name, sizeof(mlxsw_hwmon_attr->name),
576 "temp%u_label", num + 1);
577 break;
578 case MLXSW_HWMON_ATTR_TYPE_TEMP_CRIT_ALARM:
579 mlxsw_hwmon_attr->dev_attr.show =
580 mlxsw_hwmon_temp_critical_alarm_show;
581 mlxsw_hwmon_attr->dev_attr.attr.mode = 0444;
582 snprintf(mlxsw_hwmon_attr->name, sizeof(mlxsw_hwmon_attr->name),
583 "temp%u_crit_alarm", num + 1);
584 break;
585 case MLXSW_HWMON_ATTR_TYPE_TEMP_EMERGENCY_ALARM:
586 mlxsw_hwmon_attr->dev_attr.show =
587 mlxsw_hwmon_temp_emergency_alarm_show;
588 mlxsw_hwmon_attr->dev_attr.attr.mode = 0444;
589 snprintf(mlxsw_hwmon_attr->name, sizeof(mlxsw_hwmon_attr->name),
590 "temp%u_emergency_alarm", num + 1);
591 break;
592 default:
593 WARN_ON(1);
594 }
595
596 mlxsw_hwmon_attr->type_index = type_index;
597 mlxsw_hwmon_attr->mlxsw_hwmon_dev = mlxsw_hwmon_dev;
598 mlxsw_hwmon_attr->dev_attr.attr.name = mlxsw_hwmon_attr->name;
599 sysfs_attr_init(&mlxsw_hwmon_attr->dev_attr.attr);
600
601 mlxsw_hwmon_dev->attrs[attr_index] = &mlxsw_hwmon_attr->dev_attr.attr;
602 mlxsw_hwmon_dev->attrs_count++;
603 }
604
mlxsw_hwmon_temp_init(struct mlxsw_hwmon_dev * mlxsw_hwmon_dev)605 static int mlxsw_hwmon_temp_init(struct mlxsw_hwmon_dev *mlxsw_hwmon_dev)
606 {
607 struct mlxsw_hwmon *mlxsw_hwmon = mlxsw_hwmon_dev->hwmon;
608 char mtcap_pl[MLXSW_REG_MTCAP_LEN] = {0};
609 int i;
610 int err;
611
612 err = mlxsw_reg_query(mlxsw_hwmon->core, MLXSW_REG(mtcap), mtcap_pl);
613 if (err) {
614 dev_err(mlxsw_hwmon->bus_info->dev, "Failed to get number of temp sensors\n");
615 return err;
616 }
617 mlxsw_hwmon_dev->sensor_count = mlxsw_reg_mtcap_sensor_count_get(mtcap_pl);
618 for (i = 0; i < mlxsw_hwmon_dev->sensor_count; i++) {
619 char mtmp_pl[MLXSW_REG_MTMP_LEN] = {0};
620
621 mlxsw_reg_mtmp_slot_index_set(mtmp_pl,
622 mlxsw_hwmon_dev->slot_index);
623 mlxsw_reg_mtmp_sensor_index_set(mtmp_pl, i);
624 err = mlxsw_reg_query(mlxsw_hwmon->core, MLXSW_REG(mtmp),
625 mtmp_pl);
626 if (err)
627 return err;
628 mlxsw_reg_mtmp_mte_set(mtmp_pl, true);
629 mlxsw_reg_mtmp_mtr_set(mtmp_pl, true);
630 err = mlxsw_reg_write(mlxsw_hwmon->core,
631 MLXSW_REG(mtmp), mtmp_pl);
632 if (err) {
633 dev_err(mlxsw_hwmon->bus_info->dev, "Failed to setup temp sensor number %d\n",
634 i);
635 return err;
636 }
637 mlxsw_hwmon_attr_add(mlxsw_hwmon_dev,
638 MLXSW_HWMON_ATTR_TYPE_TEMP, i, i);
639 mlxsw_hwmon_attr_add(mlxsw_hwmon_dev,
640 MLXSW_HWMON_ATTR_TYPE_TEMP_MAX, i, i);
641 mlxsw_hwmon_attr_add(mlxsw_hwmon_dev,
642 MLXSW_HWMON_ATTR_TYPE_TEMP_RST, i, i);
643 }
644 return 0;
645 }
646
mlxsw_hwmon_fans_init(struct mlxsw_hwmon_dev * mlxsw_hwmon_dev)647 static int mlxsw_hwmon_fans_init(struct mlxsw_hwmon_dev *mlxsw_hwmon_dev)
648 {
649 struct mlxsw_hwmon *mlxsw_hwmon = mlxsw_hwmon_dev->hwmon;
650 char mfcr_pl[MLXSW_REG_MFCR_LEN] = {0};
651 enum mlxsw_reg_mfcr_pwm_frequency freq;
652 unsigned int type_index;
653 unsigned int num;
654 u16 tacho_active;
655 u8 pwm_active;
656 int err;
657
658 err = mlxsw_reg_query(mlxsw_hwmon->core, MLXSW_REG(mfcr), mfcr_pl);
659 if (err) {
660 dev_err(mlxsw_hwmon->bus_info->dev, "Failed to get to probe PWMs and Tachometers\n");
661 return err;
662 }
663 mlxsw_reg_mfcr_unpack(mfcr_pl, &freq, &tacho_active, &pwm_active);
664 num = 0;
665 for (type_index = 0; type_index < MLXSW_MFCR_TACHOS_MAX; type_index++) {
666 if (tacho_active & BIT(type_index)) {
667 mlxsw_hwmon_attr_add(mlxsw_hwmon_dev,
668 MLXSW_HWMON_ATTR_TYPE_FAN_RPM,
669 type_index, num);
670 mlxsw_hwmon_attr_add(mlxsw_hwmon_dev,
671 MLXSW_HWMON_ATTR_TYPE_FAN_FAULT,
672 type_index, num++);
673 }
674 }
675 num = 0;
676 for (type_index = 0; type_index < MLXSW_MFCR_PWMS_MAX; type_index++) {
677 if (pwm_active & BIT(type_index))
678 mlxsw_hwmon_attr_add(mlxsw_hwmon_dev,
679 MLXSW_HWMON_ATTR_TYPE_PWM,
680 type_index, num++);
681 }
682 return 0;
683 }
684
mlxsw_hwmon_module_init(struct mlxsw_hwmon_dev * mlxsw_hwmon_dev)685 static int mlxsw_hwmon_module_init(struct mlxsw_hwmon_dev *mlxsw_hwmon_dev)
686 {
687 struct mlxsw_hwmon *mlxsw_hwmon = mlxsw_hwmon_dev->hwmon;
688 char mgpir_pl[MLXSW_REG_MGPIR_LEN];
689 u8 module_sensor_max;
690 int i, err;
691
692 mlxsw_reg_mgpir_pack(mgpir_pl, mlxsw_hwmon_dev->slot_index);
693 err = mlxsw_reg_query(mlxsw_hwmon->core, MLXSW_REG(mgpir), mgpir_pl);
694 if (err)
695 return err;
696
697 mlxsw_reg_mgpir_unpack(mgpir_pl, NULL, NULL, NULL,
698 &module_sensor_max, NULL);
699
700 /* Add extra attributes for module temperature. Sensor index is
701 * assigned to sensor_count value, while all indexed before
702 * sensor_count are already utilized by the sensors connected through
703 * mtmp register by mlxsw_hwmon_temp_init().
704 */
705 mlxsw_hwmon_dev->module_sensor_max = mlxsw_hwmon_dev->sensor_count +
706 module_sensor_max;
707 for (i = mlxsw_hwmon_dev->sensor_count;
708 i < mlxsw_hwmon_dev->module_sensor_max; i++) {
709 mlxsw_hwmon_attr_add(mlxsw_hwmon_dev,
710 MLXSW_HWMON_ATTR_TYPE_TEMP_MODULE, i, i);
711 mlxsw_hwmon_attr_add(mlxsw_hwmon_dev,
712 MLXSW_HWMON_ATTR_TYPE_TEMP_MODULE_FAULT,
713 i, i);
714 mlxsw_hwmon_attr_add(mlxsw_hwmon_dev,
715 MLXSW_HWMON_ATTR_TYPE_TEMP_MODULE_CRIT, i,
716 i);
717 mlxsw_hwmon_attr_add(mlxsw_hwmon_dev,
718 MLXSW_HWMON_ATTR_TYPE_TEMP_MODULE_EMERG,
719 i, i);
720 mlxsw_hwmon_attr_add(mlxsw_hwmon_dev,
721 MLXSW_HWMON_ATTR_TYPE_TEMP_MODULE_LABEL,
722 i, i);
723 mlxsw_hwmon_attr_add(mlxsw_hwmon_dev,
724 MLXSW_HWMON_ATTR_TYPE_TEMP_CRIT_ALARM,
725 i, i);
726 mlxsw_hwmon_attr_add(mlxsw_hwmon_dev,
727 MLXSW_HWMON_ATTR_TYPE_TEMP_EMERGENCY_ALARM,
728 i, i);
729 }
730
731 return 0;
732 }
733
mlxsw_hwmon_gearbox_init(struct mlxsw_hwmon_dev * mlxsw_hwmon_dev)734 static int mlxsw_hwmon_gearbox_init(struct mlxsw_hwmon_dev *mlxsw_hwmon_dev)
735 {
736 struct mlxsw_hwmon *mlxsw_hwmon = mlxsw_hwmon_dev->hwmon;
737 enum mlxsw_reg_mgpir_device_type device_type;
738 int index, max_index, sensor_index;
739 char mgpir_pl[MLXSW_REG_MGPIR_LEN];
740 char mtmp_pl[MLXSW_REG_MTMP_LEN];
741 u8 gbox_num;
742 int err;
743
744 mlxsw_reg_mgpir_pack(mgpir_pl, mlxsw_hwmon_dev->slot_index);
745 err = mlxsw_reg_query(mlxsw_hwmon->core, MLXSW_REG(mgpir), mgpir_pl);
746 if (err)
747 return err;
748
749 mlxsw_reg_mgpir_unpack(mgpir_pl, &gbox_num, &device_type, NULL, NULL,
750 NULL);
751 if (device_type != MLXSW_REG_MGPIR_DEVICE_TYPE_GEARBOX_DIE ||
752 !gbox_num)
753 return 0;
754
755 index = mlxsw_hwmon_dev->module_sensor_max;
756 max_index = mlxsw_hwmon_dev->module_sensor_max + gbox_num;
757 while (index < max_index) {
758 sensor_index = index % mlxsw_hwmon_dev->module_sensor_max +
759 MLXSW_REG_MTMP_GBOX_INDEX_MIN;
760 mlxsw_reg_mtmp_pack(mtmp_pl, mlxsw_hwmon_dev->slot_index,
761 sensor_index, true, true);
762 err = mlxsw_reg_write(mlxsw_hwmon->core,
763 MLXSW_REG(mtmp), mtmp_pl);
764 if (err) {
765 dev_err(mlxsw_hwmon->bus_info->dev, "Failed to setup temp sensor number %d\n",
766 sensor_index);
767 return err;
768 }
769 mlxsw_hwmon_attr_add(mlxsw_hwmon_dev,
770 MLXSW_HWMON_ATTR_TYPE_TEMP, index, index);
771 mlxsw_hwmon_attr_add(mlxsw_hwmon_dev,
772 MLXSW_HWMON_ATTR_TYPE_TEMP_MAX, index,
773 index);
774 mlxsw_hwmon_attr_add(mlxsw_hwmon_dev,
775 MLXSW_HWMON_ATTR_TYPE_TEMP_RST, index,
776 index);
777 mlxsw_hwmon_attr_add(mlxsw_hwmon_dev,
778 MLXSW_HWMON_ATTR_TYPE_TEMP_GBOX_LABEL,
779 index, index);
780 index++;
781 }
782
783 return 0;
784 }
785
786 static void
mlxsw_hwmon_got_active(struct mlxsw_core * mlxsw_core,u8 slot_index,void * priv)787 mlxsw_hwmon_got_active(struct mlxsw_core *mlxsw_core, u8 slot_index,
788 void *priv)
789 {
790 struct mlxsw_hwmon *hwmon = priv;
791 struct mlxsw_hwmon_dev *linecard;
792 struct device *dev;
793 int err;
794
795 dev = hwmon->bus_info->dev;
796 linecard = &hwmon->line_cards[slot_index];
797 if (linecard->active)
798 return;
799 /* For the main board, module sensor indexes start from 1, sensor index
800 * 0 is used for the ASIC. Use the same numbering for line cards.
801 */
802 linecard->sensor_count = 1;
803 linecard->slot_index = slot_index;
804 linecard->hwmon = hwmon;
805 err = mlxsw_hwmon_module_init(linecard);
806 if (err) {
807 dev_err(dev, "Failed to configure hwmon objects for line card modules in slot %d\n",
808 slot_index);
809 return;
810 }
811
812 err = mlxsw_hwmon_gearbox_init(linecard);
813 if (err) {
814 dev_err(dev, "Failed to configure hwmon objects for line card gearboxes in slot %d\n",
815 slot_index);
816 return;
817 }
818
819 linecard->groups[0] = &linecard->group;
820 linecard->group.attrs = linecard->attrs;
821 sprintf(linecard->name, "%s#%02u", "linecard", slot_index);
822 linecard->hwmon_dev =
823 hwmon_device_register_with_groups(dev, linecard->name,
824 linecard, linecard->groups);
825 if (IS_ERR(linecard->hwmon_dev)) {
826 dev_err(dev, "Failed to register hwmon objects for line card in slot %d\n",
827 slot_index);
828 return;
829 }
830
831 linecard->active = true;
832 }
833
834 static void
mlxsw_hwmon_got_inactive(struct mlxsw_core * mlxsw_core,u8 slot_index,void * priv)835 mlxsw_hwmon_got_inactive(struct mlxsw_core *mlxsw_core, u8 slot_index,
836 void *priv)
837 {
838 struct mlxsw_hwmon *hwmon = priv;
839 struct mlxsw_hwmon_dev *linecard;
840
841 linecard = &hwmon->line_cards[slot_index];
842 if (!linecard->active)
843 return;
844 linecard->active = false;
845 hwmon_device_unregister(linecard->hwmon_dev);
846 /* Reset attributes counter */
847 linecard->attrs_count = 0;
848 }
849
850 static struct mlxsw_linecards_event_ops mlxsw_hwmon_event_ops = {
851 .got_active = mlxsw_hwmon_got_active,
852 .got_inactive = mlxsw_hwmon_got_inactive,
853 };
854
mlxsw_hwmon_init(struct mlxsw_core * mlxsw_core,const struct mlxsw_bus_info * mlxsw_bus_info,struct mlxsw_hwmon ** p_hwmon)855 int mlxsw_hwmon_init(struct mlxsw_core *mlxsw_core,
856 const struct mlxsw_bus_info *mlxsw_bus_info,
857 struct mlxsw_hwmon **p_hwmon)
858 {
859 char mgpir_pl[MLXSW_REG_MGPIR_LEN];
860 struct mlxsw_hwmon *mlxsw_hwmon;
861 struct device *hwmon_dev;
862 u8 num_of_slots;
863 int err;
864
865 mlxsw_reg_mgpir_pack(mgpir_pl, 0);
866 err = mlxsw_reg_query(mlxsw_core, MLXSW_REG(mgpir), mgpir_pl);
867 if (err)
868 return err;
869
870 mlxsw_reg_mgpir_unpack(mgpir_pl, NULL, NULL, NULL, NULL,
871 &num_of_slots);
872
873 mlxsw_hwmon = kzalloc(struct_size(mlxsw_hwmon, line_cards,
874 num_of_slots + 1), GFP_KERNEL);
875 if (!mlxsw_hwmon)
876 return -ENOMEM;
877
878 mlxsw_hwmon->core = mlxsw_core;
879 mlxsw_hwmon->bus_info = mlxsw_bus_info;
880 mlxsw_hwmon->line_cards[0].hwmon = mlxsw_hwmon;
881 mlxsw_hwmon->line_cards[0].slot_index = 0;
882
883 err = mlxsw_hwmon_temp_init(&mlxsw_hwmon->line_cards[0]);
884 if (err)
885 goto err_temp_init;
886
887 err = mlxsw_hwmon_fans_init(&mlxsw_hwmon->line_cards[0]);
888 if (err)
889 goto err_fans_init;
890
891 err = mlxsw_hwmon_module_init(&mlxsw_hwmon->line_cards[0]);
892 if (err)
893 goto err_temp_module_init;
894
895 err = mlxsw_hwmon_gearbox_init(&mlxsw_hwmon->line_cards[0]);
896 if (err)
897 goto err_temp_gearbox_init;
898
899 mlxsw_hwmon->line_cards[0].groups[0] = &mlxsw_hwmon->line_cards[0].group;
900 mlxsw_hwmon->line_cards[0].group.attrs = mlxsw_hwmon->line_cards[0].attrs;
901
902 hwmon_dev = hwmon_device_register_with_groups(mlxsw_bus_info->dev,
903 "mlxsw",
904 &mlxsw_hwmon->line_cards[0],
905 mlxsw_hwmon->line_cards[0].groups);
906 if (IS_ERR(hwmon_dev)) {
907 err = PTR_ERR(hwmon_dev);
908 goto err_hwmon_register;
909 }
910
911 err = mlxsw_linecards_event_ops_register(mlxsw_hwmon->core,
912 &mlxsw_hwmon_event_ops,
913 mlxsw_hwmon);
914 if (err)
915 goto err_linecards_event_ops_register;
916
917 mlxsw_hwmon->line_cards[0].hwmon_dev = hwmon_dev;
918 mlxsw_hwmon->line_cards[0].active = true;
919 *p_hwmon = mlxsw_hwmon;
920 return 0;
921
922 err_linecards_event_ops_register:
923 hwmon_device_unregister(mlxsw_hwmon->line_cards[0].hwmon_dev);
924 err_hwmon_register:
925 err_temp_gearbox_init:
926 err_temp_module_init:
927 err_fans_init:
928 err_temp_init:
929 kfree(mlxsw_hwmon);
930 return err;
931 }
932
mlxsw_hwmon_fini(struct mlxsw_hwmon * mlxsw_hwmon)933 void mlxsw_hwmon_fini(struct mlxsw_hwmon *mlxsw_hwmon)
934 {
935 mlxsw_hwmon->line_cards[0].active = false;
936 mlxsw_linecards_event_ops_unregister(mlxsw_hwmon->core,
937 &mlxsw_hwmon_event_ops, mlxsw_hwmon);
938 hwmon_device_unregister(mlxsw_hwmon->line_cards[0].hwmon_dev);
939 kfree(mlxsw_hwmon);
940 }
941