diff options
Diffstat (limited to 'drivers/net/ethernet/sfc/mcdi_mon.c')
| -rw-r--r-- | drivers/net/ethernet/sfc/mcdi_mon.c | 531 |
1 files changed, 531 insertions, 0 deletions
diff --git a/drivers/net/ethernet/sfc/mcdi_mon.c b/drivers/net/ethernet/sfc/mcdi_mon.c new file mode 100644 index 000000000..f5128db7c --- /dev/null +++ b/drivers/net/ethernet/sfc/mcdi_mon.c @@ -0,0 +1,531 @@ +// SPDX-License-Identifier: GPL-2.0-only +/**************************************************************************** + * Driver for Solarflare network controllers and boards + * Copyright 2011-2013 Solarflare Communications Inc. + */ + +#include <linux/bitops.h> +#include <linux/slab.h> +#include <linux/hwmon.h> +#include <linux/stat.h> + +#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]; + + strscpy(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 */ |