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linux/drivers/net/ethernet/sfc/mcdi_mon.c

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// 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];
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 */
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