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Linux 4.16.11
[linux/fpc-iii.git] / drivers / net / ethernet / sfc / mcdi_mon.c
blobf97da05952c749279f6615f5a3c79a605ff4d488
1 /****************************************************************************
2 * Driver for Solarflare network controllers and boards
3 * Copyright 2011-2013 Solarflare Communications Inc.
4 *
5 * This program is free software; you can redistribute it and/or modify it
6 * under the terms of the GNU General Public License version 2 as published
7 * by the Free Software Foundation, incorporated herein by reference.
8 */
9
10 #include <linux/bitops.h>
11 #include <linux/slab.h>
12 #include <linux/hwmon.h>
13 #include <linux/stat.h>
14
15 #include "net_driver.h"
16 #include "mcdi.h"
17 #include "mcdi_pcol.h"
18 #include "nic.h"
19
20 enum efx_hwmon_type {
21 EFX_HWMON_UNKNOWN,
22 EFX_HWMON_TEMP, /* temperature */
23 EFX_HWMON_COOL, /* cooling device, probably a heatsink */
24 EFX_HWMON_IN, /* voltage */
25 EFX_HWMON_CURR, /* current */
26 EFX_HWMON_POWER, /* power */
27 EFX_HWMON_TYPES_COUNT
28 };
29
30 static const char *const efx_hwmon_unit[EFX_HWMON_TYPES_COUNT] = {
31 [EFX_HWMON_TEMP] = " degC",
32 [EFX_HWMON_COOL] = " rpm", /* though nonsense for a heatsink */
33 [EFX_HWMON_IN] = " mV",
34 [EFX_HWMON_CURR] = " mA",
35 [EFX_HWMON_POWER] = " W",
36 };
37
38 static const struct {
39 const char *label;
40 enum efx_hwmon_type hwmon_type;
41 int port;
42 } efx_mcdi_sensor_type[] = {
43 #define SENSOR(name, label, hwmon_type, port) \
44 [MC_CMD_SENSOR_##name] = { label, EFX_HWMON_ ## hwmon_type, port }
45 SENSOR(CONTROLLER_TEMP, "Controller board temp.", TEMP, -1),
46 SENSOR(PHY_COMMON_TEMP, "PHY temp.", TEMP, -1),
47 SENSOR(CONTROLLER_COOLING, "Controller heat sink", COOL, -1),
48 SENSOR(PHY0_TEMP, "PHY temp.", TEMP, 0),
49 SENSOR(PHY0_COOLING, "PHY heat sink", COOL, 0),
50 SENSOR(PHY1_TEMP, "PHY temp.", TEMP, 1),
51 SENSOR(PHY1_COOLING, "PHY heat sink", COOL, 1),
52 SENSOR(IN_1V0, "1.0V supply", IN, -1),
53 SENSOR(IN_1V2, "1.2V supply", IN, -1),
54 SENSOR(IN_1V8, "1.8V supply", IN, -1),
55 SENSOR(IN_2V5, "2.5V supply", IN, -1),
56 SENSOR(IN_3V3, "3.3V supply", IN, -1),
57 SENSOR(IN_12V0, "12.0V supply", IN, -1),
58 SENSOR(IN_1V2A, "1.2V analogue supply", IN, -1),
59 SENSOR(IN_VREF, "Ref. voltage", IN, -1),
60 SENSOR(OUT_VAOE, "AOE FPGA supply", IN, -1),
61 SENSOR(AOE_TEMP, "AOE FPGA temp.", TEMP, -1),
62 SENSOR(PSU_AOE_TEMP, "AOE regulator temp.", TEMP, -1),
63 SENSOR(PSU_TEMP, "Controller regulator temp.",
64 TEMP, -1),
65 SENSOR(FAN_0, "Fan 0", COOL, -1),
66 SENSOR(FAN_1, "Fan 1", COOL, -1),
67 SENSOR(FAN_2, "Fan 2", COOL, -1),
68 SENSOR(FAN_3, "Fan 3", COOL, -1),
69 SENSOR(FAN_4, "Fan 4", COOL, -1),
70 SENSOR(IN_VAOE, "AOE input supply", IN, -1),
71 SENSOR(OUT_IAOE, "AOE output current", CURR, -1),
72 SENSOR(IN_IAOE, "AOE input current", CURR, -1),
73 SENSOR(NIC_POWER, "Board power use", POWER, -1),
74 SENSOR(IN_0V9, "0.9V supply", IN, -1),
75 SENSOR(IN_I0V9, "0.9V supply current", CURR, -1),
76 SENSOR(IN_I1V2, "1.2V supply current", CURR, -1),
77 SENSOR(IN_0V9_ADC, "0.9V supply (ext. ADC)", IN, -1),
78 SENSOR(CONTROLLER_2_TEMP, "Controller board temp. 2", TEMP, -1),
79 SENSOR(VREG_INTERNAL_TEMP, "Regulator die temp.", TEMP, -1),
80 SENSOR(VREG_0V9_TEMP, "0.9V regulator temp.", TEMP, -1),
81 SENSOR(VREG_1V2_TEMP, "1.2V regulator temp.", TEMP, -1),
82 SENSOR(CONTROLLER_VPTAT,
83 "Controller PTAT voltage (int. ADC)", IN, -1),
84 SENSOR(CONTROLLER_INTERNAL_TEMP,
85 "Controller die temp. (int. ADC)", TEMP, -1),
86 SENSOR(CONTROLLER_VPTAT_EXTADC,
87 "Controller PTAT voltage (ext. ADC)", IN, -1),
88 SENSOR(CONTROLLER_INTERNAL_TEMP_EXTADC,
89 "Controller die temp. (ext. ADC)", TEMP, -1),
90 SENSOR(AMBIENT_TEMP, "Ambient temp.", TEMP, -1),
91 SENSOR(AIRFLOW, "Air flow raw", IN, -1),
92 SENSOR(VDD08D_VSS08D_CSR, "0.9V die (int. ADC)", IN, -1),
93 SENSOR(VDD08D_VSS08D_CSR_EXTADC, "0.9V die (ext. ADC)", IN, -1),
94 SENSOR(HOTPOINT_TEMP, "Controller board temp. (hotpoint)", TEMP, -1),
95 #undef SENSOR
96 };
97
98 static const char *const sensor_status_names[] = {
99 [MC_CMD_SENSOR_STATE_OK] = "OK",
100 [MC_CMD_SENSOR_STATE_WARNING] = "Warning",
101 [MC_CMD_SENSOR_STATE_FATAL] = "Fatal",
102 [MC_CMD_SENSOR_STATE_BROKEN] = "Device failure",
103 [MC_CMD_SENSOR_STATE_NO_READING] = "No reading",
104 };
105
106 void efx_mcdi_sensor_event(struct efx_nic *efx, efx_qword_t *ev)
107 {
108 unsigned int type, state, value;
109 enum efx_hwmon_type hwmon_type = EFX_HWMON_UNKNOWN;
110 const char *name = NULL, *state_txt, *unit;
111
112 type = EFX_QWORD_FIELD(*ev, MCDI_EVENT_SENSOREVT_MONITOR);
113 state = EFX_QWORD_FIELD(*ev, MCDI_EVENT_SENSOREVT_STATE);
114 value = EFX_QWORD_FIELD(*ev, MCDI_EVENT_SENSOREVT_VALUE);
115
116 /* Deal gracefully with the board having more drivers than we
117 * know about, but do not expect new sensor states. */
118 if (type < ARRAY_SIZE(efx_mcdi_sensor_type)) {
119 name = efx_mcdi_sensor_type[type].label;
120 hwmon_type = efx_mcdi_sensor_type[type].hwmon_type;
121 }
122 if (!name)
123 name = "No sensor name available";
124 EFX_WARN_ON_PARANOID(state >= ARRAY_SIZE(sensor_status_names));
125 state_txt = sensor_status_names[state];
126 EFX_WARN_ON_PARANOID(hwmon_type >= EFX_HWMON_TYPES_COUNT);
127 unit = efx_hwmon_unit[hwmon_type];
128 if (!unit)
129 unit = "";
130
131 netif_err(efx, hw, efx->net_dev,
132 "Sensor %d (%s) reports condition '%s' for value %d%s\n",
133 type, name, state_txt, value, unit);
134 }
135
136 #ifdef CONFIG_SFC_MCDI_MON
137
138 struct efx_mcdi_mon_attribute {
139 struct device_attribute dev_attr;
140 unsigned int index;
141 unsigned int type;
142 enum efx_hwmon_type hwmon_type;
143 unsigned int limit_value;
144 char name[12];
145 };
146
147 static int efx_mcdi_mon_update(struct efx_nic *efx)
148 {
149 struct efx_mcdi_mon *hwmon = efx_mcdi_mon(efx);
150 MCDI_DECLARE_BUF(inbuf, MC_CMD_READ_SENSORS_EXT_IN_LEN);
151 int rc;
152
153 MCDI_SET_QWORD(inbuf, READ_SENSORS_EXT_IN_DMA_ADDR,
154 hwmon->dma_buf.dma_addr);
155 MCDI_SET_DWORD(inbuf, READ_SENSORS_EXT_IN_LENGTH, hwmon->dma_buf.len);
156
157 rc = efx_mcdi_rpc(efx, MC_CMD_READ_SENSORS,
158 inbuf, sizeof(inbuf), NULL, 0, NULL);
159 if (rc == 0)
160 hwmon->last_update = jiffies;
161 return rc;
162 }
163
164 static int efx_mcdi_mon_get_entry(struct device *dev, unsigned int index,
165 efx_dword_t *entry)
166 {
167 struct efx_nic *efx = dev_get_drvdata(dev->parent);
168 struct efx_mcdi_mon *hwmon = efx_mcdi_mon(efx);
169 int rc;
170
171 BUILD_BUG_ON(MC_CMD_READ_SENSORS_OUT_LEN != 0);
172
173 mutex_lock(&hwmon->update_lock);
174
175 /* Use cached value if last update was < 1 s ago */
176 if (time_before(jiffies, hwmon->last_update + HZ))
177 rc = 0;
178 else
179 rc = efx_mcdi_mon_update(efx);
180
181 /* Copy out the requested entry */
182 *entry = ((efx_dword_t *)hwmon->dma_buf.addr)[index];
183
184 mutex_unlock(&hwmon->update_lock);
185
186 return rc;
187 }
188
189 static ssize_t efx_mcdi_mon_show_value(struct device *dev,
190 struct device_attribute *attr,
191 char *buf)
192 {
193 struct efx_mcdi_mon_attribute *mon_attr =
194 container_of(attr, struct efx_mcdi_mon_attribute, dev_attr);
195 efx_dword_t entry;
196 unsigned int value, state;
197 int rc;
198
199 rc = efx_mcdi_mon_get_entry(dev, mon_attr->index, &entry);
200 if (rc)
201 return rc;
202
203 state = EFX_DWORD_FIELD(entry, MC_CMD_SENSOR_VALUE_ENTRY_TYPEDEF_STATE);
204 if (state == MC_CMD_SENSOR_STATE_NO_READING)
205 return -EBUSY;
206
207 value = EFX_DWORD_FIELD(entry, MC_CMD_SENSOR_VALUE_ENTRY_TYPEDEF_VALUE);
208
209 switch (mon_attr->hwmon_type) {
210 case EFX_HWMON_TEMP:
211 /* Convert temperature from degrees to milli-degrees Celsius */
212 value *= 1000;
213 break;
214 case EFX_HWMON_POWER:
215 /* Convert power from watts to microwatts */
216 value *= 1000000;
217 break;
218 default:
219 /* No conversion needed */
220 break;
221 }
222
223 return sprintf(buf, "%u\n", value);
224 }
225
226 static ssize_t efx_mcdi_mon_show_limit(struct device *dev,
227 struct device_attribute *attr,
228 char *buf)
229 {
230 struct efx_mcdi_mon_attribute *mon_attr =
231 container_of(attr, struct efx_mcdi_mon_attribute, dev_attr);
232 unsigned int value;
233
234 value = mon_attr->limit_value;
235
236 switch (mon_attr->hwmon_type) {
237 case EFX_HWMON_TEMP:
238 /* Convert temperature from degrees to milli-degrees Celsius */
239 value *= 1000;
240 break;
241 case EFX_HWMON_POWER:
242 /* Convert power from watts to microwatts */
243 value *= 1000000;
244 break;
245 default:
246 /* No conversion needed */
247 break;
248 }
249
250 return sprintf(buf, "%u\n", value);
251 }
252
253 static ssize_t efx_mcdi_mon_show_alarm(struct device *dev,
254 struct device_attribute *attr,
255 char *buf)
256 {
257 struct efx_mcdi_mon_attribute *mon_attr =
258 container_of(attr, struct efx_mcdi_mon_attribute, dev_attr);
259 efx_dword_t entry;
260 int state;
261 int rc;
262
263 rc = efx_mcdi_mon_get_entry(dev, mon_attr->index, &entry);
264 if (rc)
265 return rc;
266
267 state = EFX_DWORD_FIELD(entry, MC_CMD_SENSOR_VALUE_ENTRY_TYPEDEF_STATE);
268 return sprintf(buf, "%d\n", state != MC_CMD_SENSOR_STATE_OK);
269 }
270
271 static ssize_t efx_mcdi_mon_show_label(struct device *dev,
272 struct device_attribute *attr,
273 char *buf)
274 {
275 struct efx_mcdi_mon_attribute *mon_attr =
276 container_of(attr, struct efx_mcdi_mon_attribute, dev_attr);
277 return sprintf(buf, "%s\n",
278 efx_mcdi_sensor_type[mon_attr->type].label);
279 }
280
281 static void
282 efx_mcdi_mon_add_attr(struct efx_nic *efx, const char *name,
283 ssize_t (*reader)(struct device *,
284 struct device_attribute *, char *),
285 unsigned int index, unsigned int type,
286 unsigned int limit_value)
287 {
288 struct efx_mcdi_mon *hwmon = efx_mcdi_mon(efx);
289 struct efx_mcdi_mon_attribute *attr = &hwmon->attrs[hwmon->n_attrs];
290
291 strlcpy(attr->name, name, sizeof(attr->name));
292 attr->index = index;
293 attr->type = type;
294 if (type < ARRAY_SIZE(efx_mcdi_sensor_type))
295 attr->hwmon_type = efx_mcdi_sensor_type[type].hwmon_type;
296 else
297 attr->hwmon_type = EFX_HWMON_UNKNOWN;
298 attr->limit_value = limit_value;
299 sysfs_attr_init(&attr->dev_attr.attr);
300 attr->dev_attr.attr.name = attr->name;
301 attr->dev_attr.attr.mode = S_IRUGO;
302 attr->dev_attr.show = reader;
303 hwmon->group.attrs[hwmon->n_attrs++] = &attr->dev_attr.attr;
304 }
305
306 int efx_mcdi_mon_probe(struct efx_nic *efx)
307 {
308 unsigned int n_temp = 0, n_cool = 0, n_in = 0, n_curr = 0, n_power = 0;
309 struct efx_mcdi_mon *hwmon = efx_mcdi_mon(efx);
310 MCDI_DECLARE_BUF(inbuf, MC_CMD_SENSOR_INFO_EXT_IN_LEN);
311 MCDI_DECLARE_BUF(outbuf, MC_CMD_SENSOR_INFO_OUT_LENMAX);
312 unsigned int n_pages, n_sensors, n_attrs, page;
313 size_t outlen;
314 char name[12];
315 u32 mask;
316 int rc, i, j, type;
317
318 /* Find out how many sensors are present */
319 n_sensors = 0;
320 page = 0;
321 do {
322 MCDI_SET_DWORD(inbuf, SENSOR_INFO_EXT_IN_PAGE, page);
323
324 rc = efx_mcdi_rpc(efx, MC_CMD_SENSOR_INFO, inbuf, sizeof(inbuf),
325 outbuf, sizeof(outbuf), &outlen);
326 if (rc)
327 return rc;
328 if (outlen < MC_CMD_SENSOR_INFO_OUT_LENMIN)
329 return -EIO;
330
331 mask = MCDI_DWORD(outbuf, SENSOR_INFO_OUT_MASK);
332 n_sensors += hweight32(mask & ~(1 << MC_CMD_SENSOR_PAGE0_NEXT));
333 ++page;
334 } while (mask & (1 << MC_CMD_SENSOR_PAGE0_NEXT));
335 n_pages = page;
336
337 /* Don't create a device if there are none */
338 if (n_sensors == 0)
339 return 0;
340
341 rc = efx_nic_alloc_buffer(
342 efx, &hwmon->dma_buf,
343 n_sensors * MC_CMD_SENSOR_VALUE_ENTRY_TYPEDEF_LEN,
344 GFP_KERNEL);
345 if (rc)
346 return rc;
347
348 mutex_init(&hwmon->update_lock);
349 efx_mcdi_mon_update(efx);
350
351 /* Allocate space for the maximum possible number of
352 * attributes for this set of sensors:
353 * value, min, max, crit, alarm and label for each sensor.
354 */
355 n_attrs = 6 * n_sensors;
356 hwmon->attrs = kcalloc(n_attrs, sizeof(*hwmon->attrs), GFP_KERNEL);
357 if (!hwmon->attrs) {
358 rc = -ENOMEM;
359 goto fail;
360 }
361 hwmon->group.attrs = kcalloc(n_attrs + 1, sizeof(struct attribute *),
362 GFP_KERNEL);
363 if (!hwmon->group.attrs) {
364 rc = -ENOMEM;
365 goto fail;
366 }
367
368 for (i = 0, j = -1, type = -1; ; i++) {
369 enum efx_hwmon_type hwmon_type;
370 const char *hwmon_prefix;
371 unsigned hwmon_index;
372 u16 min1, max1, min2, max2;
373
374 /* Find next sensor type or exit if there is none */
375 do {
376 type++;
377
378 if ((type % 32) == 0) {
379 page = type / 32;
380 j = -1;
381 if (page == n_pages)
382 goto hwmon_register;
383
384 MCDI_SET_DWORD(inbuf, SENSOR_INFO_EXT_IN_PAGE,
385 page);
386 rc = efx_mcdi_rpc(efx, MC_CMD_SENSOR_INFO,
387 inbuf, sizeof(inbuf),
388 outbuf, sizeof(outbuf),
389 &outlen);
390 if (rc)
391 goto fail;
392 if (outlen < MC_CMD_SENSOR_INFO_OUT_LENMIN) {
393 rc = -EIO;
394 goto fail;
395 }
396
397 mask = (MCDI_DWORD(outbuf,
398 SENSOR_INFO_OUT_MASK) &
399 ~(1 << MC_CMD_SENSOR_PAGE0_NEXT));
400
401 /* Check again for short response */
402 if (outlen <
403 MC_CMD_SENSOR_INFO_OUT_LEN(hweight32(mask))) {
404 rc = -EIO;
405 goto fail;
406 }
407 }
408 } while (!(mask & (1 << type % 32)));
409 j++;
410
411 if (type < ARRAY_SIZE(efx_mcdi_sensor_type)) {
412 hwmon_type = efx_mcdi_sensor_type[type].hwmon_type;
413
414 /* Skip sensors specific to a different port */
415 if (hwmon_type != EFX_HWMON_UNKNOWN &&
416 efx_mcdi_sensor_type[type].port >= 0 &&
417 efx_mcdi_sensor_type[type].port !=
418 efx_port_num(efx))
419 continue;
420 } else {
421 hwmon_type = EFX_HWMON_UNKNOWN;
422 }
423
424 switch (hwmon_type) {
425 case EFX_HWMON_TEMP:
426 hwmon_prefix = "temp";
427 hwmon_index = ++n_temp; /* 1-based */
428 break;
429 case EFX_HWMON_COOL:
430 /* This is likely to be a heatsink, but there
431 * is no convention for representing cooling
432 * devices other than fans.
433 */
434 hwmon_prefix = "fan";
435 hwmon_index = ++n_cool; /* 1-based */
436 break;
437 default:
438 hwmon_prefix = "in";
439 hwmon_index = n_in++; /* 0-based */
440 break;
441 case EFX_HWMON_CURR:
442 hwmon_prefix = "curr";
443 hwmon_index = ++n_curr; /* 1-based */
444 break;
445 case EFX_HWMON_POWER:
446 hwmon_prefix = "power";
447 hwmon_index = ++n_power; /* 1-based */
448 break;
449 }
450
451 min1 = MCDI_ARRAY_FIELD(outbuf, SENSOR_ENTRY,
452 SENSOR_INFO_ENTRY, j, MIN1);
453 max1 = MCDI_ARRAY_FIELD(outbuf, SENSOR_ENTRY,
454 SENSOR_INFO_ENTRY, j, MAX1);
455 min2 = MCDI_ARRAY_FIELD(outbuf, SENSOR_ENTRY,
456 SENSOR_INFO_ENTRY, j, MIN2);
457 max2 = MCDI_ARRAY_FIELD(outbuf, SENSOR_ENTRY,
458 SENSOR_INFO_ENTRY, j, MAX2);
459
460 if (min1 != max1) {
461 snprintf(name, sizeof(name), "%s%u_input",
462 hwmon_prefix, hwmon_index);
463 efx_mcdi_mon_add_attr(
464 efx, name, efx_mcdi_mon_show_value, i, type, 0);
465
466 if (hwmon_type != EFX_HWMON_POWER) {
467 snprintf(name, sizeof(name), "%s%u_min",
468 hwmon_prefix, hwmon_index);
469 efx_mcdi_mon_add_attr(
470 efx, name, efx_mcdi_mon_show_limit,
471 i, type, min1);
472 }
473
474 snprintf(name, sizeof(name), "%s%u_max",
475 hwmon_prefix, hwmon_index);
476 efx_mcdi_mon_add_attr(
477 efx, name, efx_mcdi_mon_show_limit,
478 i, type, max1);
479
480 if (min2 != max2) {
481 /* Assume max2 is critical value.
482 * But we have no good way to expose min2.
483 */
484 snprintf(name, sizeof(name), "%s%u_crit",
485 hwmon_prefix, hwmon_index);
486 efx_mcdi_mon_add_attr(
487 efx, name, efx_mcdi_mon_show_limit,
488 i, type, max2);
489 }
490 }
491
492 snprintf(name, sizeof(name), "%s%u_alarm",
493 hwmon_prefix, hwmon_index);
494 efx_mcdi_mon_add_attr(
495 efx, name, efx_mcdi_mon_show_alarm, i, type, 0);
496
497 if (type < ARRAY_SIZE(efx_mcdi_sensor_type) &&
498 efx_mcdi_sensor_type[type].label) {
499 snprintf(name, sizeof(name), "%s%u_label",
500 hwmon_prefix, hwmon_index);
501 efx_mcdi_mon_add_attr(
502 efx, name, efx_mcdi_mon_show_label, i, type, 0);
503 }
504 }
505
506 hwmon_register:
507 hwmon->groups[0] = &hwmon->group;
508 hwmon->device = hwmon_device_register_with_groups(&efx->pci_dev->dev,
509 KBUILD_MODNAME, NULL,
510 hwmon->groups);
511 if (IS_ERR(hwmon->device)) {
512 rc = PTR_ERR(hwmon->device);
513 goto fail;
514 }
515
516 return 0;
517
518 fail:
519 efx_mcdi_mon_remove(efx);
520 return rc;
521 }
522
523 void efx_mcdi_mon_remove(struct efx_nic *efx)
524 {
525 struct efx_mcdi_mon *hwmon = efx_mcdi_mon(efx);
526
527 if (hwmon->device)
528 hwmon_device_unregister(hwmon->device);
529 kfree(hwmon->attrs);
530 kfree(hwmon->group.attrs);
531 efx_nic_free_buffer(efx, &hwmon->dma_buf);
532 }
533
534 #endif /* CONFIG_SFC_MCDI_MON */
Linux with added FPC-III support