/****************************************************************************
* Driver for Solarflare Solarstorm network controllers and boards
* Copyright 2011 Solarflare Communications Inc.
*
* This program is free software; you can redistribute it and/or modify it
* under the terms of the GNU General Public License version 2 as published
* by the Free Software Foundation, incorporated herein by reference.
*/
#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 /* input voltage */
};
static const struct {
const char *label;
enum efx_hwmon_type hwmon_type;
int port;
} efx_mcdi_sensor_type[MC_CMD_SENSOR_ENTRY_MAXNUM] = {
#define SENSOR(name, label, hwmon_type, port) \
[MC_CMD_SENSOR_##name] = { label, hwmon_type, port }
SENSOR(CONTROLLER_TEMP, "Controller temp.", EFX_HWMON_TEMP, -1),
SENSOR(PHY_COMMON_TEMP, "PHY temp.", EFX_HWMON_TEMP, -1),
SENSOR(CONTROLLER_COOLING, "Controller cooling", EFX_HWMON_COOL, -1),
SENSOR(PHY0_TEMP, "PHY temp.", EFX_HWMON_TEMP, 0),
SENSOR(PHY0_COOLING, "PHY cooling", EFX_HWMON_COOL, 0),
SENSOR(PHY1_TEMP, "PHY temp.", EFX_HWMON_TEMP, 1),
SENSOR(PHY1_COOLING, "PHY cooling", EFX_HWMON_COOL, 1),
SENSOR(IN_1V0, "1.0V supply", EFX_HWMON_IN, -1),
SENSOR(IN_1V2, "1.2V supply", EFX_HWMON_IN, -1),
SENSOR(IN_1V8, "1.8V supply", EFX_HWMON_IN, -1),
SENSOR(IN_2V5, "2.5V supply", EFX_HWMON_IN, -1),
SENSOR(IN_3V3, "3.3V supply", EFX_HWMON_IN, -1),
SENSOR(IN_12V0, "12.0V supply", EFX_HWMON_IN, -1),
SENSOR(IN_1V2A, "1.2V analogue supply", EFX_HWMON_IN, -1),
SENSOR(IN_VREF, "ref. voltage", EFX_HWMON_IN, -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",
};
void efx_mcdi_sensor_event(struct efx_nic *efx, efx_qword_t *ev)
{
unsigned int type, state, value;
const char *name = NULL, *state_txt;
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;
if (!name)
name = "No sensor name available";
EFX_BUG_ON_PARANOID(state >= ARRAY_SIZE(sensor_status_names));
state_txt = sensor_status_names[state];
netif_err(efx, hw, efx->net_dev,
"Sensor %d (%s) reports condition '%s' for raw value %d\n",
type, name, state_txt, value);
}
#ifdef CONFIG_SFC_MCDI_MON
struct efx_mcdi_mon_attribute {
struct device_attribute dev_attr;
unsigned int index;
unsigned int 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);
u8 inbuf[MC_CMD_READ_SENSORS_IN_LEN];
int rc;
MCDI_SET_DWORD(inbuf, READ_SENSORS_IN_DMA_ADDR_LO,
hwmon->dma_buf.dma_addr & 0xffffffff);
MCDI_SET_DWORD(inbuf, READ_SENSORS_IN_DMA_ADDR_HI,
(u64)hwmon->dma_buf.dma_addr >> 32);
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 ssize_t efx_mcdi_mon_show_name(struct device *dev,
struct device_attribute *attr,
char *buf)
{
return sprintf(buf, "%s\n", KBUILD_MODNAME);
}
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);
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;
int rc;
rc = efx_mcdi_mon_get_entry(dev, mon_attr->index, &entry);
if (rc)
return rc;
value = EFX_DWORD_FIELD(entry, MC_CMD_SENSOR_VALUE_ENTRY_TYPEDEF_VALUE);
/* Convert temperature from degrees to milli-degrees Celsius */
if (efx_mcdi_sensor_type[mon_attr->type].hwmon_type == EFX_HWMON_TEMP)
value *= 1000;
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;
/* Convert temperature from degrees to milli-degrees Celsius */
if (efx_mcdi_sensor_type[mon_attr->type].hwmon_type == EFX_HWMON_TEMP)
value *= 1000;
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 int
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];
int rc;
strlcpy(attr->name, name, sizeof(attr->name));
attr->index = index;
attr->type = type;
attr->limit_value = limit_value;
attr->dev_attr.attr.name = attr->name;
attr->dev_attr.attr.mode = S_IRUGO;
attr->dev_attr.show = reader;
rc = device_create_file(&efx->pci_dev->dev, &attr->dev_attr);
if (rc == 0)
++hwmon->n_attrs;
return rc;
}
int efx_mcdi_mon_probe(struct efx_nic *efx)
{
struct efx_mcdi_mon *hwmon = efx_mcdi_mon(efx);
unsigned int n_attrs, n_temp = 0, n_cool = 0, n_in = 0;
u8 outbuf[MC_CMD_SENSOR_INFO_OUT_LENMAX];
size_t outlen;
char name[12];
u32 mask;
int rc, i, type;
BUILD_BUG_ON(MC_CMD_SENSOR_INFO_IN_LEN != 0);
rc = efx_mcdi_rpc(efx, MC_CMD_SENSOR_INFO, NULL, 0,
outbuf, sizeof(outbuf), &outlen);
if (rc)
return rc;
if (outlen < MC_CMD_SENSOR_INFO_OUT_LENMIN)
return -EIO;
/* Find out which sensors are present. Don't create a device
* if there are none.
*/
mask = MCDI_DWORD(outbuf, SENSOR_INFO_OUT_MASK);
if (mask == 0)
return 0;
/* Check again for short response */
if (outlen < MC_CMD_SENSOR_INFO_OUT_LEN(hweight32(mask)))
return -EIO;
rc = efx_nic_alloc_buffer(efx, &hwmon->dma_buf,
4 * MC_CMD_SENSOR_ENTRY_MAXNUM);
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: name of the driver plus
* value, min, max, crit, alarm and label for each sensor.
*/
n_attrs = 1 + 6 * hweight32(mask);
hwmon->attrs = kcalloc(n_attrs, sizeof(*hwmon->attrs), GFP_KERNEL);
if (!hwmon->attrs) {
rc = -ENOMEM;
goto fail;
}
hwmon->device = hwmon_device_register(&efx->pci_dev->dev);
if (IS_ERR(hwmon->device)) {
rc = PTR_ERR(hwmon->device);
goto fail;
}
rc = efx_mcdi_mon_add_attr(efx, "name", efx_mcdi_mon_show_name, 0, 0, 0);
if (rc)
goto fail;
for (i = 0, type = -1; ; i++) {
const char *hwmon_prefix;
unsigned hwmon_index;
u16 min1, max1, min2, max2;
/* Find next sensor type or exit if there is none */
type++;
while (!(mask & (1 << type))) {
type++;
if (type == 32)
return 0;
}
/* Skip sensors specific to a different port */
if (efx_mcdi_sensor_type[type].hwmon_type != EFX_HWMON_UNKNOWN &&
efx_mcdi_sensor_type[type].port >= 0 &&
efx_mcdi_sensor_type[type].port != efx_port_num(efx))
continue;
switch (efx_mcdi_sensor_type[type].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;
}
min1 = MCDI_ARRAY_FIELD(outbuf, SENSOR_ENTRY,
SENSOR_INFO_ENTRY, i, MIN1);
max1 = MCDI_ARRAY_FIELD(outbuf, SENSOR_ENTRY,
SENSOR_INFO_ENTRY, i, MAX1);
min2 = MCDI_ARRAY_FIELD(outbuf, SENSOR_ENTRY,
SENSOR_INFO_ENTRY, i, MIN2);
max2 = MCDI_ARRAY_FIELD(outbuf, SENSOR_ENTRY,
SENSOR_INFO_ENTRY, i, MAX2);
if (min1 != max1) {
snprintf(name, sizeof(name), "%s%u_input",
hwmon_prefix, hwmon_index);
rc = efx_mcdi_mon_add_attr(
efx, name, efx_mcdi_mon_show_value, i, type, 0);
if (rc)
goto fail;
snprintf(name, sizeof(name), "%s%u_min",
hwmon_prefix, hwmon_index);
rc = efx_mcdi_mon_add_attr(
efx, name, efx_mcdi_mon_show_limit,
i, type, min1);
if (rc)
goto fail;
snprintf(name, sizeof(name), "%s%u_max",
hwmon_prefix, hwmon_index);
rc = efx_mcdi_mon_add_attr(
efx, name, efx_mcdi_mon_show_limit,
i, type, max1);
if (rc)
goto fail;
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);
rc = efx_mcdi_mon_add_attr(
efx, name, efx_mcdi_mon_show_limit,
i, type, max2);
if (rc)
goto fail;
}
}
snprintf(name, sizeof(name), "%s%u_alarm",
hwmon_prefix, hwmon_index);
rc = efx_mcdi_mon_add_attr(
efx, name, efx_mcdi_mon_show_alarm, i, type, 0);
if (rc)
goto fail;
if (efx_mcdi_sensor_type[type].label) {
snprintf(name, sizeof(name), "%s%u_label",
hwmon_prefix, hwmon_index);
rc = efx_mcdi_mon_add_attr(
efx, name, efx_mcdi_mon_show_label, i, type, 0);
if (rc)
goto fail;
}
}
fail:
efx_mcdi_mon_remove(efx);
return rc;
}
void efx_mcdi_mon_remove(struct efx_nic *efx)
{
struct siena_nic_data *nic_data = efx->nic_data;
struct efx_mcdi_mon *hwmon = &nic_data->hwmon;
unsigned int i;
for (i = 0; i < hwmon->n_attrs; i++)
device_remove_file(&efx->pci_dev->dev,
&hwmon->attrs[i].dev_attr);
kfree(hwmon->attrs);
if (hwmon->device)
hwmon_device_unregister(hwmon->device);
efx_nic_free_buffer(efx, &hwmon->dma_buf);
}
#endif /* CONFIG_SFC_MCDI_MON */
