532 lines · c
1// SPDX-License-Identifier: GPL-2.0-only2/****************************************************************************3 * Driver for Solarflare network controllers and boards4 * Copyright 2011-2013 Solarflare Communications Inc.5 */6 7#include <linux/bitops.h>8#include <linux/slab.h>9#include <linux/hwmon.h>10#include <linux/stat.h>11 12#include "net_driver.h"13#include "mcdi.h"14#include "mcdi_pcol.h"15#include "nic.h"16 17enum efx_hwmon_type {18 EFX_HWMON_UNKNOWN,19 EFX_HWMON_TEMP, /* temperature */20 EFX_HWMON_COOL, /* cooling device, probably a heatsink */21 EFX_HWMON_IN, /* voltage */22 EFX_HWMON_CURR, /* current */23 EFX_HWMON_POWER, /* power */24 EFX_HWMON_TYPES_COUNT25};26 27static const char *const efx_hwmon_unit[EFX_HWMON_TYPES_COUNT] = {28 [EFX_HWMON_TEMP] = " degC",29 [EFX_HWMON_COOL] = " rpm", /* though nonsense for a heatsink */30 [EFX_HWMON_IN] = " mV",31 [EFX_HWMON_CURR] = " mA",32 [EFX_HWMON_POWER] = " W",33};34 35static const struct {36 const char *label;37 enum efx_hwmon_type hwmon_type;38 int port;39} efx_mcdi_sensor_type[] = {40#define SENSOR(name, label, hwmon_type, port) \41 [MC_CMD_SENSOR_##name] = { label, EFX_HWMON_ ## hwmon_type, port }42 SENSOR(CONTROLLER_TEMP, "Controller board temp.", TEMP, -1),43 SENSOR(PHY_COMMON_TEMP, "PHY temp.", TEMP, -1),44 SENSOR(CONTROLLER_COOLING, "Controller heat sink", COOL, -1),45 SENSOR(PHY0_TEMP, "PHY temp.", TEMP, 0),46 SENSOR(PHY0_COOLING, "PHY heat sink", COOL, 0),47 SENSOR(PHY1_TEMP, "PHY temp.", TEMP, 1),48 SENSOR(PHY1_COOLING, "PHY heat sink", COOL, 1),49 SENSOR(IN_1V0, "1.0V supply", IN, -1),50 SENSOR(IN_1V2, "1.2V supply", IN, -1),51 SENSOR(IN_1V8, "1.8V supply", IN, -1),52 SENSOR(IN_2V5, "2.5V supply", IN, -1),53 SENSOR(IN_3V3, "3.3V supply", IN, -1),54 SENSOR(IN_12V0, "12.0V supply", IN, -1),55 SENSOR(IN_1V2A, "1.2V analogue supply", IN, -1),56 SENSOR(IN_VREF, "Ref. voltage", IN, -1),57 SENSOR(OUT_VAOE, "AOE FPGA supply", IN, -1),58 SENSOR(AOE_TEMP, "AOE FPGA temp.", TEMP, -1),59 SENSOR(PSU_AOE_TEMP, "AOE regulator temp.", TEMP, -1),60 SENSOR(PSU_TEMP, "Controller regulator temp.",61 TEMP, -1),62 SENSOR(FAN_0, "Fan 0", COOL, -1),63 SENSOR(FAN_1, "Fan 1", COOL, -1),64 SENSOR(FAN_2, "Fan 2", COOL, -1),65 SENSOR(FAN_3, "Fan 3", COOL, -1),66 SENSOR(FAN_4, "Fan 4", COOL, -1),67 SENSOR(IN_VAOE, "AOE input supply", IN, -1),68 SENSOR(OUT_IAOE, "AOE output current", CURR, -1),69 SENSOR(IN_IAOE, "AOE input current", CURR, -1),70 SENSOR(NIC_POWER, "Board power use", POWER, -1),71 SENSOR(IN_0V9, "0.9V supply", IN, -1),72 SENSOR(IN_I0V9, "0.9V supply current", CURR, -1),73 SENSOR(IN_I1V2, "1.2V supply current", CURR, -1),74 SENSOR(IN_0V9_ADC, "0.9V supply (ext. ADC)", IN, -1),75 SENSOR(CONTROLLER_2_TEMP, "Controller board temp. 2", TEMP, -1),76 SENSOR(VREG_INTERNAL_TEMP, "Regulator die temp.", TEMP, -1),77 SENSOR(VREG_0V9_TEMP, "0.9V regulator temp.", TEMP, -1),78 SENSOR(VREG_1V2_TEMP, "1.2V regulator temp.", TEMP, -1),79 SENSOR(CONTROLLER_VPTAT,80 "Controller PTAT voltage (int. ADC)", IN, -1),81 SENSOR(CONTROLLER_INTERNAL_TEMP,82 "Controller die temp. (int. ADC)", TEMP, -1),83 SENSOR(CONTROLLER_VPTAT_EXTADC,84 "Controller PTAT voltage (ext. ADC)", IN, -1),85 SENSOR(CONTROLLER_INTERNAL_TEMP_EXTADC,86 "Controller die temp. (ext. ADC)", TEMP, -1),87 SENSOR(AMBIENT_TEMP, "Ambient temp.", TEMP, -1),88 SENSOR(AIRFLOW, "Air flow raw", IN, -1),89 SENSOR(VDD08D_VSS08D_CSR, "0.9V die (int. ADC)", IN, -1),90 SENSOR(VDD08D_VSS08D_CSR_EXTADC, "0.9V die (ext. ADC)", IN, -1),91 SENSOR(HOTPOINT_TEMP, "Controller board temp. (hotpoint)", TEMP, -1),92#undef SENSOR93};94 95static const char *const sensor_status_names[] = {96 [MC_CMD_SENSOR_STATE_OK] = "OK",97 [MC_CMD_SENSOR_STATE_WARNING] = "Warning",98 [MC_CMD_SENSOR_STATE_FATAL] = "Fatal",99 [MC_CMD_SENSOR_STATE_BROKEN] = "Device failure",100 [MC_CMD_SENSOR_STATE_NO_READING] = "No reading",101};102 103void efx_mcdi_sensor_event(struct efx_nic *efx, efx_qword_t *ev)104{105 unsigned int type, state, value;106 enum efx_hwmon_type hwmon_type = EFX_HWMON_UNKNOWN;107 const char *name = NULL, *state_txt, *unit;108 109 type = EFX_QWORD_FIELD(*ev, MCDI_EVENT_SENSOREVT_MONITOR);110 state = EFX_QWORD_FIELD(*ev, MCDI_EVENT_SENSOREVT_STATE);111 value = EFX_QWORD_FIELD(*ev, MCDI_EVENT_SENSOREVT_VALUE);112 113 /* Deal gracefully with the board having more drivers than we114 * know about, but do not expect new sensor states. */115 if (type < ARRAY_SIZE(efx_mcdi_sensor_type)) {116 name = efx_mcdi_sensor_type[type].label;117 hwmon_type = efx_mcdi_sensor_type[type].hwmon_type;118 }119 if (!name)120 name = "No sensor name available";121 EFX_WARN_ON_PARANOID(state >= ARRAY_SIZE(sensor_status_names));122 state_txt = sensor_status_names[state];123 EFX_WARN_ON_PARANOID(hwmon_type >= EFX_HWMON_TYPES_COUNT);124 unit = efx_hwmon_unit[hwmon_type];125 if (!unit)126 unit = "";127 128 netif_err(efx, hw, efx->net_dev,129 "Sensor %d (%s) reports condition '%s' for value %d%s\n",130 type, name, state_txt, value, unit);131}132 133#ifdef CONFIG_SFC_MCDI_MON134 135struct efx_mcdi_mon_attribute {136 struct device_attribute dev_attr;137 unsigned int index;138 unsigned int type;139 enum efx_hwmon_type hwmon_type;140 unsigned int limit_value;141 char name[12];142};143 144static int efx_mcdi_mon_update(struct efx_nic *efx)145{146 struct efx_mcdi_mon *hwmon = efx_mcdi_mon(efx);147 MCDI_DECLARE_BUF(inbuf, MC_CMD_READ_SENSORS_EXT_IN_LEN);148 int rc;149 150 MCDI_SET_QWORD(inbuf, READ_SENSORS_EXT_IN_DMA_ADDR,151 hwmon->dma_buf.dma_addr);152 MCDI_SET_DWORD(inbuf, READ_SENSORS_EXT_IN_LENGTH, hwmon->dma_buf.len);153 154 rc = efx_mcdi_rpc(efx, MC_CMD_READ_SENSORS,155 inbuf, sizeof(inbuf), NULL, 0, NULL);156 if (rc == 0)157 hwmon->last_update = jiffies;158 return rc;159}160 161static int efx_mcdi_mon_get_entry(struct device *dev, unsigned int index,162 efx_dword_t *entry)163{164 struct efx_nic *efx = dev_get_drvdata(dev->parent);165 struct efx_mcdi_mon *hwmon = efx_mcdi_mon(efx);166 int rc;167 168 BUILD_BUG_ON(MC_CMD_READ_SENSORS_OUT_LEN != 0);169 170 mutex_lock(&hwmon->update_lock);171 172 /* Use cached value if last update was < 1 s ago */173 if (time_before(jiffies, hwmon->last_update + HZ))174 rc = 0;175 else176 rc = efx_mcdi_mon_update(efx);177 178 /* Copy out the requested entry */179 *entry = ((efx_dword_t *)hwmon->dma_buf.addr)[index];180 181 mutex_unlock(&hwmon->update_lock);182 183 return rc;184}185 186static ssize_t efx_mcdi_mon_show_value(struct device *dev,187 struct device_attribute *attr,188 char *buf)189{190 struct efx_mcdi_mon_attribute *mon_attr =191 container_of(attr, struct efx_mcdi_mon_attribute, dev_attr);192 efx_dword_t entry;193 unsigned int value, state;194 int rc;195 196 rc = efx_mcdi_mon_get_entry(dev, mon_attr->index, &entry);197 if (rc)198 return rc;199 200 state = EFX_DWORD_FIELD(entry, MC_CMD_SENSOR_VALUE_ENTRY_TYPEDEF_STATE);201 if (state == MC_CMD_SENSOR_STATE_NO_READING)202 return -EBUSY;203 204 value = EFX_DWORD_FIELD(entry, MC_CMD_SENSOR_VALUE_ENTRY_TYPEDEF_VALUE);205 206 switch (mon_attr->hwmon_type) {207 case EFX_HWMON_TEMP:208 /* Convert temperature from degrees to milli-degrees Celsius */209 value *= 1000;210 break;211 case EFX_HWMON_POWER:212 /* Convert power from watts to microwatts */213 value *= 1000000;214 break;215 default:216 /* No conversion needed */217 break;218 }219 220 return sprintf(buf, "%u\n", value);221}222 223static ssize_t efx_mcdi_mon_show_limit(struct device *dev,224 struct device_attribute *attr,225 char *buf)226{227 struct efx_mcdi_mon_attribute *mon_attr =228 container_of(attr, struct efx_mcdi_mon_attribute, dev_attr);229 unsigned int value;230 231 value = mon_attr->limit_value;232 233 switch (mon_attr->hwmon_type) {234 case EFX_HWMON_TEMP:235 /* Convert temperature from degrees to milli-degrees Celsius */236 value *= 1000;237 break;238 case EFX_HWMON_POWER:239 /* Convert power from watts to microwatts */240 value *= 1000000;241 break;242 default:243 /* No conversion needed */244 break;245 }246 247 return sprintf(buf, "%u\n", value);248}249 250static ssize_t efx_mcdi_mon_show_alarm(struct device *dev,251 struct device_attribute *attr,252 char *buf)253{254 struct efx_mcdi_mon_attribute *mon_attr =255 container_of(attr, struct efx_mcdi_mon_attribute, dev_attr);256 efx_dword_t entry;257 int state;258 int rc;259 260 rc = efx_mcdi_mon_get_entry(dev, mon_attr->index, &entry);261 if (rc)262 return rc;263 264 state = EFX_DWORD_FIELD(entry, MC_CMD_SENSOR_VALUE_ENTRY_TYPEDEF_STATE);265 return sprintf(buf, "%d\n", state != MC_CMD_SENSOR_STATE_OK);266}267 268static ssize_t efx_mcdi_mon_show_label(struct device *dev,269 struct device_attribute *attr,270 char *buf)271{272 struct efx_mcdi_mon_attribute *mon_attr =273 container_of(attr, struct efx_mcdi_mon_attribute, dev_attr);274 return sprintf(buf, "%s\n",275 efx_mcdi_sensor_type[mon_attr->type].label);276}277 278static void279efx_mcdi_mon_add_attr(struct efx_nic *efx, const char *name,280 ssize_t (*reader)(struct device *,281 struct device_attribute *, char *),282 unsigned int index, unsigned int type,283 unsigned int limit_value)284{285 struct efx_mcdi_mon *hwmon = efx_mcdi_mon(efx);286 struct efx_mcdi_mon_attribute *attr = &hwmon->attrs[hwmon->n_attrs];287 288 strscpy(attr->name, name, sizeof(attr->name));289 attr->index = index;290 attr->type = type;291 if (type < ARRAY_SIZE(efx_mcdi_sensor_type))292 attr->hwmon_type = efx_mcdi_sensor_type[type].hwmon_type;293 else294 attr->hwmon_type = EFX_HWMON_UNKNOWN;295 attr->limit_value = limit_value;296 sysfs_attr_init(&attr->dev_attr.attr);297 attr->dev_attr.attr.name = attr->name;298 attr->dev_attr.attr.mode = 0444;299 attr->dev_attr.show = reader;300 hwmon->group.attrs[hwmon->n_attrs++] = &attr->dev_attr.attr;301}302 303int efx_mcdi_mon_probe(struct efx_nic *efx)304{305 unsigned int n_temp = 0, n_cool = 0, n_in = 0, n_curr = 0, n_power = 0;306 struct efx_mcdi_mon *hwmon = efx_mcdi_mon(efx);307 MCDI_DECLARE_BUF(inbuf, MC_CMD_SENSOR_INFO_EXT_IN_LEN);308 MCDI_DECLARE_BUF(outbuf, MC_CMD_SENSOR_INFO_OUT_LENMAX);309 unsigned int n_pages, n_sensors, n_attrs, page;310 size_t outlen;311 char name[12];312 u32 mask;313 int rc, i, j, type;314 315 /* Find out how many sensors are present */316 n_sensors = 0;317 page = 0;318 do {319 MCDI_SET_DWORD(inbuf, SENSOR_INFO_EXT_IN_PAGE, page);320 321 rc = efx_mcdi_rpc(efx, MC_CMD_SENSOR_INFO, inbuf, sizeof(inbuf),322 outbuf, sizeof(outbuf), &outlen);323 if (rc)324 return rc;325 if (outlen < MC_CMD_SENSOR_INFO_OUT_LENMIN)326 return -EIO;327 328 mask = MCDI_DWORD(outbuf, SENSOR_INFO_OUT_MASK);329 n_sensors += hweight32(mask & ~(1 << MC_CMD_SENSOR_PAGE0_NEXT));330 ++page;331 } while (mask & (1 << MC_CMD_SENSOR_PAGE0_NEXT));332 n_pages = page;333 334 /* Don't create a device if there are none */335 if (n_sensors == 0)336 return 0;337 338 rc = efx_nic_alloc_buffer(339 efx, &hwmon->dma_buf,340 n_sensors * MC_CMD_SENSOR_VALUE_ENTRY_TYPEDEF_LEN,341 GFP_KERNEL);342 if (rc)343 return rc;344 345 mutex_init(&hwmon->update_lock);346 efx_mcdi_mon_update(efx);347 348 /* Allocate space for the maximum possible number of349 * attributes for this set of sensors:350 * value, min, max, crit, alarm and label for each sensor.351 */352 n_attrs = 6 * n_sensors;353 hwmon->attrs = kcalloc(n_attrs, sizeof(*hwmon->attrs), GFP_KERNEL);354 if (!hwmon->attrs) {355 rc = -ENOMEM;356 goto fail;357 }358 hwmon->group.attrs = kcalloc(n_attrs + 1, sizeof(struct attribute *),359 GFP_KERNEL);360 if (!hwmon->group.attrs) {361 rc = -ENOMEM;362 goto fail;363 }364 365 for (i = 0, j = -1, type = -1; ; i++) {366 enum efx_hwmon_type hwmon_type;367 const char *hwmon_prefix;368 unsigned hwmon_index;369 u16 min1, max1, min2, max2;370 371 /* Find next sensor type or exit if there is none */372 do {373 type++;374 375 if ((type % 32) == 0) {376 page = type / 32;377 j = -1;378 if (page == n_pages)379 goto hwmon_register;380 381 MCDI_SET_DWORD(inbuf, SENSOR_INFO_EXT_IN_PAGE,382 page);383 rc = efx_mcdi_rpc(efx, MC_CMD_SENSOR_INFO,384 inbuf, sizeof(inbuf),385 outbuf, sizeof(outbuf),386 &outlen);387 if (rc)388 goto fail;389 if (outlen < MC_CMD_SENSOR_INFO_OUT_LENMIN) {390 rc = -EIO;391 goto fail;392 }393 394 mask = (MCDI_DWORD(outbuf,395 SENSOR_INFO_OUT_MASK) &396 ~(1 << MC_CMD_SENSOR_PAGE0_NEXT));397 398 /* Check again for short response */399 if (outlen <400 MC_CMD_SENSOR_INFO_OUT_LEN(hweight32(mask))) {401 rc = -EIO;402 goto fail;403 }404 }405 } while (!(mask & (1 << type % 32)));406 j++;407 408 if (type < ARRAY_SIZE(efx_mcdi_sensor_type)) {409 hwmon_type = efx_mcdi_sensor_type[type].hwmon_type;410 411 /* Skip sensors specific to a different port */412 if (hwmon_type != EFX_HWMON_UNKNOWN &&413 efx_mcdi_sensor_type[type].port >= 0 &&414 efx_mcdi_sensor_type[type].port !=415 efx_port_num(efx))416 continue;417 } else {418 hwmon_type = EFX_HWMON_UNKNOWN;419 }420 421 switch (hwmon_type) {422 case EFX_HWMON_TEMP:423 hwmon_prefix = "temp";424 hwmon_index = ++n_temp; /* 1-based */425 break;426 case EFX_HWMON_COOL:427 /* This is likely to be a heatsink, but there428 * is no convention for representing cooling429 * devices other than fans.430 */431 hwmon_prefix = "fan";432 hwmon_index = ++n_cool; /* 1-based */433 break;434 default:435 hwmon_prefix = "in";436 hwmon_index = n_in++; /* 0-based */437 break;438 case EFX_HWMON_CURR:439 hwmon_prefix = "curr";440 hwmon_index = ++n_curr; /* 1-based */441 break;442 case EFX_HWMON_POWER:443 hwmon_prefix = "power";444 hwmon_index = ++n_power; /* 1-based */445 break;446 }447 448 min1 = MCDI_ARRAY_FIELD(outbuf, SENSOR_ENTRY,449 SENSOR_INFO_ENTRY, j, MIN1);450 max1 = MCDI_ARRAY_FIELD(outbuf, SENSOR_ENTRY,451 SENSOR_INFO_ENTRY, j, MAX1);452 min2 = MCDI_ARRAY_FIELD(outbuf, SENSOR_ENTRY,453 SENSOR_INFO_ENTRY, j, MIN2);454 max2 = MCDI_ARRAY_FIELD(outbuf, SENSOR_ENTRY,455 SENSOR_INFO_ENTRY, j, MAX2);456 457 if (min1 != max1) {458 snprintf(name, sizeof(name), "%s%u_input",459 hwmon_prefix, hwmon_index);460 efx_mcdi_mon_add_attr(461 efx, name, efx_mcdi_mon_show_value, i, type, 0);462 463 if (hwmon_type != EFX_HWMON_POWER) {464 snprintf(name, sizeof(name), "%s%u_min",465 hwmon_prefix, hwmon_index);466 efx_mcdi_mon_add_attr(467 efx, name, efx_mcdi_mon_show_limit,468 i, type, min1);469 }470 471 snprintf(name, sizeof(name), "%s%u_max",472 hwmon_prefix, hwmon_index);473 efx_mcdi_mon_add_attr(474 efx, name, efx_mcdi_mon_show_limit,475 i, type, max1);476 477 if (min2 != max2) {478 /* Assume max2 is critical value.479 * But we have no good way to expose min2.480 */481 snprintf(name, sizeof(name), "%s%u_crit",482 hwmon_prefix, hwmon_index);483 efx_mcdi_mon_add_attr(484 efx, name, efx_mcdi_mon_show_limit,485 i, type, max2);486 }487 }488 489 snprintf(name, sizeof(name), "%s%u_alarm",490 hwmon_prefix, hwmon_index);491 efx_mcdi_mon_add_attr(492 efx, name, efx_mcdi_mon_show_alarm, i, type, 0);493 494 if (type < ARRAY_SIZE(efx_mcdi_sensor_type) &&495 efx_mcdi_sensor_type[type].label) {496 snprintf(name, sizeof(name), "%s%u_label",497 hwmon_prefix, hwmon_index);498 efx_mcdi_mon_add_attr(499 efx, name, efx_mcdi_mon_show_label, i, type, 0);500 }501 }502 503hwmon_register:504 hwmon->groups[0] = &hwmon->group;505 hwmon->device = hwmon_device_register_with_groups(&efx->pci_dev->dev,506 KBUILD_MODNAME, NULL,507 hwmon->groups);508 if (IS_ERR(hwmon->device)) {509 rc = PTR_ERR(hwmon->device);510 goto fail;511 }512 513 return 0;514 515fail:516 efx_mcdi_mon_remove(efx);517 return rc;518}519 520void efx_mcdi_mon_remove(struct efx_nic *efx)521{522 struct efx_mcdi_mon *hwmon = efx_mcdi_mon(efx);523 524 if (hwmon->device)525 hwmon_device_unregister(hwmon->device);526 kfree(hwmon->attrs);527 kfree(hwmon->group.attrs);528 efx_nic_free_buffer(efx, &hwmon->dma_buf);529}530 531#endif /* CONFIG_SFC_MCDI_MON */532