// SPDX-License-Identifier: GPL-2.0-only /**************************************************************************** * Driver for Solarflare network controllers and boards * Copyright 2011-2013 Solarflare Communications Inc. */ #include #include #include #include #include "net_driver.h" #include "mcdi.h" #include "mcdi_pcol.h" #include "nic.h" enum efx_hwmon_type { EFX_HWMON_UNKNOWN, EFX_HWMON_TEMP, /* temperature */ EFX_HWMON_COOL, /* cooling device, probably a heatsink */ EFX_HWMON_IN, /* voltage */ EFX_HWMON_CURR, /* current */ EFX_HWMON_POWER, /* power */ EFX_HWMON_TYPES_COUNT }; static const char *const efx_hwmon_unit[EFX_HWMON_TYPES_COUNT] = { [EFX_HWMON_TEMP] = " degC", [EFX_HWMON_COOL] = " rpm", /* though nonsense for a heatsink */ [EFX_HWMON_IN] = " mV", [EFX_HWMON_CURR] = " mA", [EFX_HWMON_POWER] = " W", }; static const struct { const char *label; enum efx_hwmon_type hwmon_type; int port; } efx_mcdi_sensor_type[] = { #define SENSOR(name, label, hwmon_type, port) \ [MC_CMD_SENSOR_##name] = { label, EFX_HWMON_ ## hwmon_type, port } SENSOR(CONTROLLER_TEMP, "Controller board temp.", TEMP, -1), SENSOR(PHY_COMMON_TEMP, "PHY temp.", TEMP, -1), SENSOR(CONTROLLER_COOLING, "Controller heat sink", COOL, -1), SENSOR(PHY0_TEMP, "PHY temp.", TEMP, 0), SENSOR(PHY0_COOLING, "PHY heat sink", COOL, 0), SENSOR(PHY1_TEMP, "PHY temp.", TEMP, 1), SENSOR(PHY1_COOLING, "PHY heat sink", COOL, 1), SENSOR(IN_1V0, "1.0V supply", IN, -1), SENSOR(IN_1V2, "1.2V supply", IN, -1), SENSOR(IN_1V8, "1.8V supply", IN, -1), SENSOR(IN_2V5, "2.5V supply", IN, -1), SENSOR(IN_3V3, "3.3V supply", IN, -1), SENSOR(IN_12V0, "12.0V supply", IN, -1), SENSOR(IN_1V2A, "1.2V analogue supply", IN, -1), SENSOR(IN_VREF, "Ref. voltage", IN, -1), SENSOR(OUT_VAOE, "AOE FPGA supply", IN, -1), SENSOR(AOE_TEMP, "AOE FPGA temp.", TEMP, -1), SENSOR(PSU_AOE_TEMP, "AOE regulator temp.", TEMP, -1), SENSOR(PSU_TEMP, "Controller regulator temp.", TEMP, -1), SENSOR(FAN_0, "Fan 0", COOL, -1), SENSOR(FAN_1, "Fan 1", COOL, -1), SENSOR(FAN_2, "Fan 2", COOL, -1), SENSOR(FAN_3, "Fan 3", COOL, -1), SENSOR(FAN_4, "Fan 4", COOL, -1), SENSOR(IN_VAOE, "AOE input supply", IN, -1), SENSOR(OUT_IAOE, "AOE output current", CURR, -1), SENSOR(IN_IAOE, "AOE input current", CURR, -1), SENSOR(NIC_POWER, "Board power use", POWER, -1), SENSOR(IN_0V9, "0.9V supply", IN, -1), SENSOR(IN_I0V9, "0.9V supply current", CURR, -1), SENSOR(IN_I1V2, "1.2V supply current", CURR, -1), SENSOR(IN_0V9_ADC, "0.9V supply (ext. ADC)", IN, -1), SENSOR(CONTROLLER_2_TEMP, "Controller board temp. 2", TEMP, -1), SENSOR(VREG_INTERNAL_TEMP, "Regulator die temp.", TEMP, -1), SENSOR(VREG_0V9_TEMP, "0.9V regulator temp.", TEMP, -1), SENSOR(VREG_1V2_TEMP, "1.2V regulator temp.", TEMP, -1), SENSOR(CONTROLLER_VPTAT, "Controller PTAT voltage (int. ADC)", IN, -1), SENSOR(CONTROLLER_INTERNAL_TEMP, "Controller die temp. (int. ADC)", TEMP, -1), SENSOR(CONTROLLER_VPTAT_EXTADC, "Controller PTAT voltage (ext. ADC)", IN, -1), SENSOR(CONTROLLER_INTERNAL_TEMP_EXTADC, "Controller die temp. (ext. ADC)", TEMP, -1), SENSOR(AMBIENT_TEMP, "Ambient temp.", TEMP, -1), SENSOR(AIRFLOW, "Air flow raw", IN, -1), SENSOR(VDD08D_VSS08D_CSR, "0.9V die (int. ADC)", IN, -1), SENSOR(VDD08D_VSS08D_CSR_EXTADC, "0.9V die (ext. ADC)", IN, -1), SENSOR(HOTPOINT_TEMP, "Controller board temp. (hotpoint)", TEMP, -1), #undef SENSOR }; static const char *const sensor_status_names[] = { [MC_CMD_SENSOR_STATE_OK] = "OK", [MC_CMD_SENSOR_STATE_WARNING] = "Warning", [MC_CMD_SENSOR_STATE_FATAL] = "Fatal", [MC_CMD_SENSOR_STATE_BROKEN] = "Device failure", [MC_CMD_SENSOR_STATE_NO_READING] = "No reading", }; void efx_mcdi_sensor_event(struct efx_nic *efx, efx_qword_t *ev) { unsigned int type, state, value; enum efx_hwmon_type hwmon_type = EFX_HWMON_UNKNOWN; const char *name = NULL, *state_txt, *unit; type = EFX_QWORD_FIELD(*ev, MCDI_EVENT_SENSOREVT_MONITOR); state = EFX_QWORD_FIELD(*ev, MCDI_EVENT_SENSOREVT_STATE); value = EFX_QWORD_FIELD(*ev, MCDI_EVENT_SENSOREVT_VALUE); /* Deal gracefully with the board having more drivers than we * know about, but do not expect new sensor states. */ if (type < ARRAY_SIZE(efx_mcdi_sensor_type)) { name = efx_mcdi_sensor_type[type].label; hwmon_type = efx_mcdi_sensor_type[type].hwmon_type; } if (!name) name = "No sensor name available"; EFX_WARN_ON_PARANOID(state >= ARRAY_SIZE(sensor_status_names)); state_txt = sensor_status_names[state]; EFX_WARN_ON_PARANOID(hwmon_type >= EFX_HWMON_TYPES_COUNT); unit = efx_hwmon_unit[hwmon_type]; if (!unit) unit = ""; netif_err(efx, hw, efx->net_dev, "Sensor %d (%s) reports condition '%s' for value %d%s\n", type, name, state_txt, value, unit); } #ifdef CONFIG_SFC_MCDI_MON struct efx_mcdi_mon_attribute { struct device_attribute dev_attr; unsigned int index; unsigned int type; enum efx_hwmon_type hwmon_type; unsigned int limit_value; char name[12]; }; static int efx_mcdi_mon_update(struct efx_nic *efx) { struct efx_mcdi_mon *hwmon = efx_mcdi_mon(efx); MCDI_DECLARE_BUF(inbuf, MC_CMD_READ_SENSORS_EXT_IN_LEN); int rc; MCDI_SET_QWORD(inbuf, READ_SENSORS_EXT_IN_DMA_ADDR, hwmon->dma_buf.dma_addr); MCDI_SET_DWORD(inbuf, READ_SENSORS_EXT_IN_LENGTH, hwmon->dma_buf.len); rc = efx_mcdi_rpc(efx, MC_CMD_READ_SENSORS, inbuf, sizeof(inbuf), NULL, 0, NULL); if (rc == 0) hwmon->last_update = jiffies; return rc; } static int efx_mcdi_mon_get_entry(struct device *dev, unsigned int index, efx_dword_t *entry) { struct efx_nic *efx = dev_get_drvdata(dev->parent); struct efx_mcdi_mon *hwmon = efx_mcdi_mon(efx); int rc; BUILD_BUG_ON(MC_CMD_READ_SENSORS_OUT_LEN != 0); mutex_lock(&hwmon->update_lock); /* Use cached value if last update was < 1 s ago */ if (time_before(jiffies, hwmon->last_update + HZ)) rc = 0; else rc = efx_mcdi_mon_update(efx); /* Copy out the requested entry */ *entry = ((efx_dword_t *)hwmon->dma_buf.addr)[index]; mutex_unlock(&hwmon->update_lock); return rc; } static ssize_t efx_mcdi_mon_show_value(struct device *dev, struct device_attribute *attr, char *buf) { struct efx_mcdi_mon_attribute *mon_attr = container_of(attr, struct efx_mcdi_mon_attribute, dev_attr); efx_dword_t entry; unsigned int value, state; int rc; rc = efx_mcdi_mon_get_entry(dev, mon_attr->index, &entry); if (rc) return rc; state = EFX_DWORD_FIELD(entry, MC_CMD_SENSOR_VALUE_ENTRY_TYPEDEF_STATE); if (state == MC_CMD_SENSOR_STATE_NO_READING) return -EBUSY; value = EFX_DWORD_FIELD(entry, MC_CMD_SENSOR_VALUE_ENTRY_TYPEDEF_VALUE); switch (mon_attr->hwmon_type) { case EFX_HWMON_TEMP: /* Convert temperature from degrees to milli-degrees Celsius */ value *= 1000; break; case EFX_HWMON_POWER: /* Convert power from watts to microwatts */ value *= 1000000; break; default: /* No conversion needed */ break; } return sprintf(buf, "%u\n", value); } static ssize_t efx_mcdi_mon_show_limit(struct device *dev, struct device_attribute *attr, char *buf) { struct efx_mcdi_mon_attribute *mon_attr = container_of(attr, struct efx_mcdi_mon_attribute, dev_attr); unsigned int value; value = mon_attr->limit_value; switch (mon_attr->hwmon_type) { case EFX_HWMON_TEMP: /* Convert temperature from degrees to milli-degrees Celsius */ value *= 1000; break; case EFX_HWMON_POWER: /* Convert power from watts to microwatts */ value *= 1000000; break; default: /* No conversion needed */ break; } return sprintf(buf, "%u\n", value); } static ssize_t efx_mcdi_mon_show_alarm(struct device *dev, struct device_attribute *attr, char *buf) { struct efx_mcdi_mon_attribute *mon_attr = container_of(attr, struct efx_mcdi_mon_attribute, dev_attr); efx_dword_t entry; int state; int rc; rc = efx_mcdi_mon_get_entry(dev, mon_attr->index, &entry); if (rc) return rc; state = EFX_DWORD_FIELD(entry, MC_CMD_SENSOR_VALUE_ENTRY_TYPEDEF_STATE); return sprintf(buf, "%d\n", state != MC_CMD_SENSOR_STATE_OK); } static ssize_t efx_mcdi_mon_show_label(struct device *dev, struct device_attribute *attr, char *buf) { struct efx_mcdi_mon_attribute *mon_attr = container_of(attr, struct efx_mcdi_mon_attribute, dev_attr); return sprintf(buf, "%s\n", efx_mcdi_sensor_type[mon_attr->type].label); } static void efx_mcdi_mon_add_attr(struct efx_nic *efx, const char *name, ssize_t (*reader)(struct device *, struct device_attribute *, char *), unsigned int index, unsigned int type, unsigned int limit_value) { struct efx_mcdi_mon *hwmon = efx_mcdi_mon(efx); struct efx_mcdi_mon_attribute *attr = &hwmon->attrs[hwmon->n_attrs]; strlcpy(attr->name, name, sizeof(attr->name)); attr->index = index; attr->type = type; if (type < ARRAY_SIZE(efx_mcdi_sensor_type)) attr->hwmon_type = efx_mcdi_sensor_type[type].hwmon_type; else attr->hwmon_type = EFX_HWMON_UNKNOWN; attr->limit_value = limit_value; sysfs_attr_init(&attr->dev_attr.attr); attr->dev_attr.attr.name = attr->name; attr->dev_attr.attr.mode = 0444; attr->dev_attr.show = reader; hwmon->group.attrs[hwmon->n_attrs++] = &attr->dev_attr.attr; } int efx_mcdi_mon_probe(struct efx_nic *efx) { unsigned int n_temp = 0, n_cool = 0, n_in = 0, n_curr = 0, n_power = 0; struct efx_mcdi_mon *hwmon = efx_mcdi_mon(efx); MCDI_DECLARE_BUF(inbuf, MC_CMD_SENSOR_INFO_EXT_IN_LEN); MCDI_DECLARE_BUF(outbuf, MC_CMD_SENSOR_INFO_OUT_LENMAX); unsigned int n_pages, n_sensors, n_attrs, page; size_t outlen; char name[12]; u32 mask; int rc, i, j, type; /* Find out how many sensors are present */ n_sensors = 0; page = 0; do { MCDI_SET_DWORD(inbuf, SENSOR_INFO_EXT_IN_PAGE, page); rc = efx_mcdi_rpc(efx, MC_CMD_SENSOR_INFO, inbuf, sizeof(inbuf), outbuf, sizeof(outbuf), &outlen); if (rc) return rc; if (outlen < MC_CMD_SENSOR_INFO_OUT_LENMIN) return -EIO; mask = MCDI_DWORD(outbuf, SENSOR_INFO_OUT_MASK); n_sensors += hweight32(mask & ~(1 << MC_CMD_SENSOR_PAGE0_NEXT)); ++page; } while (mask & (1 << MC_CMD_SENSOR_PAGE0_NEXT)); n_pages = page; /* Don't create a device if there are none */ if (n_sensors == 0) return 0; rc = efx_nic_alloc_buffer( efx, &hwmon->dma_buf, n_sensors * MC_CMD_SENSOR_VALUE_ENTRY_TYPEDEF_LEN, GFP_KERNEL); if (rc) return rc; mutex_init(&hwmon->update_lock); efx_mcdi_mon_update(efx); /* Allocate space for the maximum possible number of * attributes for this set of sensors: * value, min, max, crit, alarm and label for each sensor. */ n_attrs = 6 * n_sensors; hwmon->attrs = kcalloc(n_attrs, sizeof(*hwmon->attrs), GFP_KERNEL); if (!hwmon->attrs) { rc = -ENOMEM; goto fail; } hwmon->group.attrs = kcalloc(n_attrs + 1, sizeof(struct attribute *), GFP_KERNEL); if (!hwmon->group.attrs) { rc = -ENOMEM; goto fail; } for (i = 0, j = -1, type = -1; ; i++) { enum efx_hwmon_type hwmon_type; const char *hwmon_prefix; unsigned hwmon_index; u16 min1, max1, min2, max2; /* Find next sensor type or exit if there is none */ do { type++; if ((type % 32) == 0) { page = type / 32; j = -1; if (page == n_pages) goto hwmon_register; MCDI_SET_DWORD(inbuf, SENSOR_INFO_EXT_IN_PAGE, page); rc = efx_mcdi_rpc(efx, MC_CMD_SENSOR_INFO, inbuf, sizeof(inbuf), outbuf, sizeof(outbuf), &outlen); if (rc) goto fail; if (outlen < MC_CMD_SENSOR_INFO_OUT_LENMIN) { rc = -EIO; goto fail; } mask = (MCDI_DWORD(outbuf, SENSOR_INFO_OUT_MASK) & ~(1 << MC_CMD_SENSOR_PAGE0_NEXT)); /* Check again for short response */ if (outlen < MC_CMD_SENSOR_INFO_OUT_LEN(hweight32(mask))) { rc = -EIO; goto fail; } } } while (!(mask & (1 << type % 32))); j++; if (type < ARRAY_SIZE(efx_mcdi_sensor_type)) { hwmon_type = efx_mcdi_sensor_type[type].hwmon_type; /* Skip sensors specific to a different port */ if (hwmon_type != EFX_HWMON_UNKNOWN && efx_mcdi_sensor_type[type].port >= 0 && efx_mcdi_sensor_type[type].port != efx_port_num(efx)) continue; } else { hwmon_type = EFX_HWMON_UNKNOWN; } switch (hwmon_type) { case EFX_HWMON_TEMP: hwmon_prefix = "temp"; hwmon_index = ++n_temp; /* 1-based */ break; case EFX_HWMON_COOL: /* This is likely to be a heatsink, but there * is no convention for representing cooling * devices other than fans. */ hwmon_prefix = "fan"; hwmon_index = ++n_cool; /* 1-based */ break; default: hwmon_prefix = "in"; hwmon_index = n_in++; /* 0-based */ break; case EFX_HWMON_CURR: hwmon_prefix = "curr"; hwmon_index = ++n_curr; /* 1-based */ break; case EFX_HWMON_POWER: hwmon_prefix = "power"; hwmon_index = ++n_power; /* 1-based */ break; } min1 = MCDI_ARRAY_FIELD(outbuf, SENSOR_ENTRY, SENSOR_INFO_ENTRY, j, MIN1); max1 = MCDI_ARRAY_FIELD(outbuf, SENSOR_ENTRY, SENSOR_INFO_ENTRY, j, MAX1); min2 = MCDI_ARRAY_FIELD(outbuf, SENSOR_ENTRY, SENSOR_INFO_ENTRY, j, MIN2); max2 = MCDI_ARRAY_FIELD(outbuf, SENSOR_ENTRY, SENSOR_INFO_ENTRY, j, MAX2); if (min1 != max1) { snprintf(name, sizeof(name), "%s%u_input", hwmon_prefix, hwmon_index); efx_mcdi_mon_add_attr( efx, name, efx_mcdi_mon_show_value, i, type, 0); if (hwmon_type != EFX_HWMON_POWER) { snprintf(name, sizeof(name), "%s%u_min", hwmon_prefix, hwmon_index); efx_mcdi_mon_add_attr( efx, name, efx_mcdi_mon_show_limit, i, type, min1); } snprintf(name, sizeof(name), "%s%u_max", hwmon_prefix, hwmon_index); efx_mcdi_mon_add_attr( efx, name, efx_mcdi_mon_show_limit, i, type, max1); if (min2 != max2) { /* Assume max2 is critical value. * But we have no good way to expose min2. */ snprintf(name, sizeof(name), "%s%u_crit", hwmon_prefix, hwmon_index); efx_mcdi_mon_add_attr( efx, name, efx_mcdi_mon_show_limit, i, type, max2); } } snprintf(name, sizeof(name), "%s%u_alarm", hwmon_prefix, hwmon_index); efx_mcdi_mon_add_attr( efx, name, efx_mcdi_mon_show_alarm, i, type, 0); if (type < ARRAY_SIZE(efx_mcdi_sensor_type) && efx_mcdi_sensor_type[type].label) { snprintf(name, sizeof(name), "%s%u_label", hwmon_prefix, hwmon_index); efx_mcdi_mon_add_attr( efx, name, efx_mcdi_mon_show_label, i, type, 0); } } hwmon_register: hwmon->groups[0] = &hwmon->group; hwmon->device = hwmon_device_register_with_groups(&efx->pci_dev->dev, KBUILD_MODNAME, NULL, hwmon->groups); if (IS_ERR(hwmon->device)) { rc = PTR_ERR(hwmon->device); goto fail; } return 0; fail: efx_mcdi_mon_remove(efx); return rc; } void efx_mcdi_mon_remove(struct efx_nic *efx) { struct efx_mcdi_mon *hwmon = efx_mcdi_mon(efx); if (hwmon->device) hwmon_device_unregister(hwmon->device); kfree(hwmon->attrs); kfree(hwmon->group.attrs); efx_nic_free_buffer(efx, &hwmon->dma_buf); } #endif /* CONFIG_SFC_MCDI_MON */