[deliverable/linux.git] / drivers / net / ethernet / sfc / mcdi_mon.c

/****************************************************************************
 * Driver for Solarflare network controllers and boards
 * Copyright 2011-2013 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,		/* voltage */
	EFX_HWMON_CURR,		/* current */
	EFX_HWMON_POWER,	/* power */
};

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 ext. temp.",    TEMP,  -1),
	SENSOR(PHY_COMMON_TEMP,		"PHY temp.",		    TEMP,  -1),
	SENSOR(CONTROLLER_COOLING,	"Controller cooling",	    COOL,  -1),
	SENSOR(PHY0_TEMP,		"PHY temp.",		    TEMP,  0),
	SENSOR(PHY0_COOLING,		"PHY cooling",		    COOL,  0),
	SENSOR(PHY1_TEMP,		"PHY temp.",		    TEMP,  1),
	SENSOR(PHY1_COOLING,		"PHY cooling",		    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 power supply",	    IN,    -1),
	SENSOR(AOE_TEMP,		"AOE temp.",		    TEMP,  -1),
	SENSOR(PSU_AOE_TEMP,		"AOE PSU temp.",	    TEMP,  -1),
	SENSOR(PSU_TEMP,		"Controller PSU temp.",	    TEMP,  -1),
	SENSOR(FAN_0,			NULL,			    COOL,  -1),
	SENSOR(FAN_1,			NULL,			    COOL,  -1),
	SENSOR(FAN_2,			NULL,			    COOL,  -1),
	SENSOR(FAN_3,			NULL,			    COOL,  -1),
	SENSOR(FAN_4,			NULL,			    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 input current",	    CURR,  -1),
	SENSOR(IN_I1V2,			"1.2V input current",	    CURR,  -1),
	SENSOR(IN_0V9_ADC,		"0.9V supply (at ADC)",	    IN,    -1),
	SENSOR(CONTROLLER_2_TEMP,	"Controller ext. temp. 2",  TEMP,  -1),
	SENSOR(VREG_INTERNAL_TEMP,	"Voltage regulator 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 int. temp. raw", IN,    -1),
	SENSOR(CONTROLLER_INTERNAL_TEMP, "Controller int. temp.",   TEMP,  -1),
	SENSOR(CONTROLLER_VPTAT_EXTADC,
			      "Controller int. temp. raw (at ADC)", IN,    -1),
	SENSOR(CONTROLLER_INTERNAL_TEMP_EXTADC,
				 "Controller int. temp. (via ADC)", TEMP,  -1),
	SENSOR(AMBIENT_TEMP,		"Ambient temp.",	    TEMP,  -1),
	SENSOR(AIRFLOW,			"Air flow raw",		    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",
	[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;
	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;
	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 = S_IRUGO;
	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 */
Commit	Line	Data
55c5e0f8	1	/****************************************************************************
f7a6d2c4 BH	2	* Driver for Solarflare network controllers and boards
f7a6d2c4 BH	3	* Copyright 2011-2013 Solarflare Communications Inc.
55c5e0f8 BH	4	*
	5	* This program is free software; you can redistribute it and/or modify it
	6	* under the terms of the GNU General Public License version 2 as published
	7	* by the Free Software Foundation, incorporated herein by reference.
	8	*/
	9
	10	#include <linux/bitops.h>
	11	#include <linux/slab.h>
	12	#include <linux/hwmon.h>
	13	#include <linux/stat.h>
	14
	15	#include "net_driver.h"
	16	#include "mcdi.h"
	17	#include "mcdi_pcol.h"
	18	#include "nic.h"
	19
	20	enum efx_hwmon_type {
	21	EFX_HWMON_UNKNOWN,
	22	EFX_HWMON_TEMP, /* temperature */
	23	EFX_HWMON_COOL, /* cooling device, probably a heatsink */
38589cdc BH	24	EFX_HWMON_IN, /* voltage */
	25	EFX_HWMON_CURR, /* current */
	26	EFX_HWMON_POWER, /* power */
55c5e0f8 BH	27	};
	28
	29	static const struct {
	30	const char *label;
	31	enum efx_hwmon_type hwmon_type;
	32	int port;
d4fbdcfe	33	} efx_mcdi_sensor_type[] = {
38589cdc BH	34	#define SENSOR(name, label, hwmon_type, port) \
	35	[MC_CMD_SENSOR_##name] = { label, EFX_HWMON_ ## hwmon_type, port }
	36	SENSOR(CONTROLLER_TEMP, "Controller ext. temp.", TEMP, -1),
	37	SENSOR(PHY_COMMON_TEMP, "PHY temp.", TEMP, -1),
	38	SENSOR(CONTROLLER_COOLING, "Controller cooling", COOL, -1),
	39	SENSOR(PHY0_TEMP, "PHY temp.", TEMP, 0),
	40	SENSOR(PHY0_COOLING, "PHY cooling", COOL, 0),
	41	SENSOR(PHY1_TEMP, "PHY temp.", TEMP, 1),
	42	SENSOR(PHY1_COOLING, "PHY cooling", COOL, 1),
	43	SENSOR(IN_1V0, "1.0V supply", IN, -1),
	44	SENSOR(IN_1V2, "1.2V supply", IN, -1),
	45	SENSOR(IN_1V8, "1.8V supply", IN, -1),
	46	SENSOR(IN_2V5, "2.5V supply", IN, -1),
	47	SENSOR(IN_3V3, "3.3V supply", IN, -1),
	48	SENSOR(IN_12V0, "12.0V supply", IN, -1),
	49	SENSOR(IN_1V2A, "1.2V analogue supply", IN, -1),
	50	SENSOR(IN_VREF, "ref. voltage", IN, -1),
	51	SENSOR(OUT_VAOE, "AOE power supply", IN, -1),
	52	SENSOR(AOE_TEMP, "AOE temp.", TEMP, -1),
	53	SENSOR(PSU_AOE_TEMP, "AOE PSU temp.", TEMP, -1),
	54	SENSOR(PSU_TEMP, "Controller PSU temp.", TEMP, -1),
	55	SENSOR(FAN_0, NULL, COOL, -1),
	56	SENSOR(FAN_1, NULL, COOL, -1),
	57	SENSOR(FAN_2, NULL, COOL, -1),
	58	SENSOR(FAN_3, NULL, COOL, -1),
	59	SENSOR(FAN_4, NULL, COOL, -1),
	60	SENSOR(IN_VAOE, "AOE input supply", IN, -1),
	61	SENSOR(OUT_IAOE, "AOE output current", CURR, -1),
	62	SENSOR(IN_IAOE, "AOE input current", CURR, -1),
	63	SENSOR(NIC_POWER, "Board power use", POWER, -1),
	64	SENSOR(IN_0V9, "0.9V supply", IN, -1),
	65	SENSOR(IN_I0V9, "0.9V input current", CURR, -1),
	66	SENSOR(IN_I1V2, "1.2V input current", CURR, -1),
	67	SENSOR(IN_0V9_ADC, "0.9V supply (at ADC)", IN, -1),
	68	SENSOR(CONTROLLER_2_TEMP, "Controller ext. temp. 2", TEMP, -1),
	69	SENSOR(VREG_INTERNAL_TEMP, "Voltage regulator temp.", TEMP, -1),
	70	SENSOR(VREG_0V9_TEMP, "0.9V regulator temp.", TEMP, -1),
	71	SENSOR(VREG_1V2_TEMP, "1.2V regulator temp.", TEMP, -1),
	72	SENSOR(CONTROLLER_VPTAT, "Controller int. temp. raw", IN, -1),
	73	SENSOR(CONTROLLER_INTERNAL_TEMP, "Controller int. temp.", TEMP, -1),
	74	SENSOR(CONTROLLER_VPTAT_EXTADC,
	75	"Controller int. temp. raw (at ADC)", IN, -1),
	76	SENSOR(CONTROLLER_INTERNAL_TEMP_EXTADC,
	77	"Controller int. temp. (via ADC)", TEMP, -1),
	78	SENSOR(AMBIENT_TEMP, "Ambient temp.", TEMP, -1),
	79	SENSOR(AIRFLOW, "Air flow raw", IN, -1),
55c5e0f8 BH	80	#undef SENSOR
	81	};
	82
	83	static const char *const sensor_status_names[] = {
	84	[MC_CMD_SENSOR_STATE_OK] = "OK",
	85	[MC_CMD_SENSOR_STATE_WARNING] = "Warning",
	86	[MC_CMD_SENSOR_STATE_FATAL] = "Fatal",
	87	[MC_CMD_SENSOR_STATE_BROKEN] = "Device failure",
8c4e720f	88	[MC_CMD_SENSOR_STATE_NO_READING] = "No reading",
55c5e0f8 BH	89	};
	90
	91	void efx_mcdi_sensor_event(struct efx_nic efx, efx_qword_t ev)
	92	{
	93	unsigned int type, state, value;
	94	const char name = NULL, state_txt;
	95
	96	type = EFX_QWORD_FIELD(*ev, MCDI_EVENT_SENSOREVT_MONITOR);
	97	state = EFX_QWORD_FIELD(*ev, MCDI_EVENT_SENSOREVT_STATE);
	98	value = EFX_QWORD_FIELD(*ev, MCDI_EVENT_SENSOREVT_VALUE);
	99
	100	/* Deal gracefully with the board having more drivers than we
	101	* know about, but do not expect new sensor states. */
	102	if (type < ARRAY_SIZE(efx_mcdi_sensor_type))
	103	name = efx_mcdi_sensor_type[type].label;
	104	if (!name)
	105	name = "No sensor name available";
	106	EFX_BUG_ON_PARANOID(state >= ARRAY_SIZE(sensor_status_names));
	107	state_txt = sensor_status_names[state];
	108
	109	netif_err(efx, hw, efx->net_dev,
	110	"Sensor %d (%s) reports condition '%s' for raw value %d\n",
	111	type, name, state_txt, value);
	112	}
	113
	114	#ifdef CONFIG_SFC_MCDI_MON
	115
	116	struct efx_mcdi_mon_attribute {
	117	struct device_attribute dev_attr;
	118	unsigned int index;
	119	unsigned int type;
d4fbdcfe	120	enum efx_hwmon_type hwmon_type;
55c5e0f8 BH	121	unsigned int limit_value;
	122	char name[12];
	123	};
	124
	125	static int efx_mcdi_mon_update(struct efx_nic *efx)
	126	{
	127	struct efx_mcdi_mon *hwmon = efx_mcdi_mon(efx);
d4fbdcfe	128	MCDI_DECLARE_BUF(inbuf, MC_CMD_READ_SENSORS_EXT_IN_LEN);
55c5e0f8 BH	129	int rc;
55c5e0f8 BH	130
d4fbdcfe	131	MCDI_SET_QWORD(inbuf, READ_SENSORS_EXT_IN_DMA_ADDR,
338f74df	132	hwmon->dma_buf.dma_addr);
d4fbdcfe	133	MCDI_SET_DWORD(inbuf, READ_SENSORS_EXT_IN_LENGTH, hwmon->dma_buf.len);
55c5e0f8 BH	134
	135	rc = efx_mcdi_rpc(efx, MC_CMD_READ_SENSORS,
	136	inbuf, sizeof(inbuf), NULL, 0, NULL);
	137	if (rc == 0)
	138	hwmon->last_update = jiffies;
	139	return rc;
	140	}
	141
55c5e0f8 BH	142	static int efx_mcdi_mon_get_entry(struct device *dev, unsigned int index,
	143	efx_dword_t *entry)
	144	{
85493e6d	145	struct efx_nic *efx = dev_get_drvdata(dev->parent);
55c5e0f8 BH	146	struct efx_mcdi_mon *hwmon = efx_mcdi_mon(efx);
	147	int rc;
	148
	149	BUILD_BUG_ON(MC_CMD_READ_SENSORS_OUT_LEN != 0);
	150
	151	mutex_lock(&hwmon->update_lock);
	152
	153	/* Use cached value if last update was < 1 s ago */
	154	if (time_before(jiffies, hwmon->last_update + HZ))
	155	rc = 0;
	156	else
	157	rc = efx_mcdi_mon_update(efx);
	158
	159	/* Copy out the requested entry */
	160	entry = ((efx_dword_t )hwmon->dma_buf.addr)[index];
	161
	162	mutex_unlock(&hwmon->update_lock);
	163
	164	return rc;
	165	}
	166
	167	static ssize_t efx_mcdi_mon_show_value(struct device *dev,
	168	struct device_attribute *attr,
	169	char *buf)
	170	{
	171	struct efx_mcdi_mon_attribute *mon_attr =
	172	container_of(attr, struct efx_mcdi_mon_attribute, dev_attr);
	173	efx_dword_t entry;
8c4e720f	174	unsigned int value, state;
55c5e0f8 BH	175	int rc;
	176
	177	rc = efx_mcdi_mon_get_entry(dev, mon_attr->index, &entry);
	178	if (rc)
	179	return rc;
	180
8c4e720f AR	181	state = EFX_DWORD_FIELD(entry, MC_CMD_SENSOR_VALUE_ENTRY_TYPEDEF_STATE);
	182	if (state == MC_CMD_SENSOR_STATE_NO_READING)
	183	return -EBUSY;
	184
55c5e0f8 BH	185	value = EFX_DWORD_FIELD(entry, MC_CMD_SENSOR_VALUE_ENTRY_TYPEDEF_VALUE);
55c5e0f8 BH	186
38589cdc BH	187	switch (mon_attr->hwmon_type) {
	188	case EFX_HWMON_TEMP:
	189	/* Convert temperature from degrees to milli-degrees Celsius */
55c5e0f8	190	value *= 1000;
38589cdc BH	191	break;
	192	case EFX_HWMON_POWER:
	193	/* Convert power from watts to microwatts */
	194	value *= 1000000;
	195	break;
	196	default:
	197	/* No conversion needed */
	198	break;
	199	}
55c5e0f8 BH	200
	201	return sprintf(buf, "%u\n", value);
	202	}
	203
	204	static ssize_t efx_mcdi_mon_show_limit(struct device *dev,
	205	struct device_attribute *attr,
	206	char *buf)
	207	{
	208	struct efx_mcdi_mon_attribute *mon_attr =
	209	container_of(attr, struct efx_mcdi_mon_attribute, dev_attr);
	210	unsigned int value;
	211
	212	value = mon_attr->limit_value;
	213
38589cdc BH	214	switch (mon_attr->hwmon_type) {
	215	case EFX_HWMON_TEMP:
	216	/* Convert temperature from degrees to milli-degrees Celsius */
55c5e0f8	217	value *= 1000;
38589cdc BH	218	break;
	219	case EFX_HWMON_POWER:
	220	/* Convert power from watts to microwatts */
	221	value *= 1000000;
	222	break;
	223	default:
	224	/* No conversion needed */
	225	break;
	226	}
55c5e0f8 BH	227
	228	return sprintf(buf, "%u\n", value);
	229	}
	230
	231	static ssize_t efx_mcdi_mon_show_alarm(struct device *dev,
	232	struct device_attribute *attr,
	233	char *buf)
	234	{
	235	struct efx_mcdi_mon_attribute *mon_attr =
	236	container_of(attr, struct efx_mcdi_mon_attribute, dev_attr);
	237	efx_dword_t entry;
	238	int state;
	239	int rc;
	240
	241	rc = efx_mcdi_mon_get_entry(dev, mon_attr->index, &entry);
	242	if (rc)
	243	return rc;
	244
	245	state = EFX_DWORD_FIELD(entry, MC_CMD_SENSOR_VALUE_ENTRY_TYPEDEF_STATE);
	246	return sprintf(buf, "%d\n", state != MC_CMD_SENSOR_STATE_OK);
	247	}
	248
	249	static ssize_t efx_mcdi_mon_show_label(struct device *dev,
	250	struct device_attribute *attr,
	251	char *buf)
	252	{
	253	struct efx_mcdi_mon_attribute *mon_attr =
	254	container_of(attr, struct efx_mcdi_mon_attribute, dev_attr);
	255	return sprintf(buf, "%s\n",
	256	efx_mcdi_sensor_type[mon_attr->type].label);
	257	}
	258
85493e6d	259	static void
55c5e0f8 BH	260	efx_mcdi_mon_add_attr(struct efx_nic efx, const char name,
	261	ssize_t (reader)(struct device ,
	262	struct device_attribute , char ),
	263	unsigned int index, unsigned int type,
	264	unsigned int limit_value)
	265	{
	266	struct efx_mcdi_mon *hwmon = efx_mcdi_mon(efx);
	267	struct efx_mcdi_mon_attribute *attr = &hwmon->attrs[hwmon->n_attrs];
55c5e0f8 BH	268
	269	strlcpy(attr->name, name, sizeof(attr->name));
	270	attr->index = index;
	271	attr->type = type;
d4fbdcfe BH	272	if (type < ARRAY_SIZE(efx_mcdi_sensor_type))
	273	attr->hwmon_type = efx_mcdi_sensor_type[type].hwmon_type;
	274	else
	275	attr->hwmon_type = EFX_HWMON_UNKNOWN;
55c5e0f8	276	attr->limit_value = limit_value;
a9ec6bd1	277	sysfs_attr_init(&attr->dev_attr.attr);
55c5e0f8 BH	278	attr->dev_attr.attr.name = attr->name;
	279	attr->dev_attr.attr.mode = S_IRUGO;
	280	attr->dev_attr.show = reader;
85493e6d	281	hwmon->group.attrs[hwmon->n_attrs++] = &attr->dev_attr.attr;
55c5e0f8 BH	282	}
	283
	284	int efx_mcdi_mon_probe(struct efx_nic *efx)
	285	{
38589cdc	286	unsigned int n_temp = 0, n_cool = 0, n_in = 0, n_curr = 0, n_power = 0;
55c5e0f8	287	struct efx_mcdi_mon *hwmon = efx_mcdi_mon(efx);
d4fbdcfe	288	MCDI_DECLARE_BUF(inbuf, MC_CMD_SENSOR_INFO_EXT_IN_LEN);
59cfc479	289	MCDI_DECLARE_BUF(outbuf, MC_CMD_SENSOR_INFO_OUT_LENMAX);
d4fbdcfe	290	unsigned int n_pages, n_sensors, n_attrs, page;
55c5e0f8 BH	291	size_t outlen;
	292	char name[12];
	293	u32 mask;
d4fbdcfe	294	int rc, i, j, type;
55c5e0f8	295
d4fbdcfe BH	296	/* Find out how many sensors are present */
	297	n_sensors = 0;
	298	page = 0;
	299	do {
	300	MCDI_SET_DWORD(inbuf, SENSOR_INFO_EXT_IN_PAGE, page);
55c5e0f8	301
d4fbdcfe BH	302	rc = efx_mcdi_rpc(efx, MC_CMD_SENSOR_INFO, inbuf, sizeof(inbuf),
	303	outbuf, sizeof(outbuf), &outlen);
	304	if (rc)
	305	return rc;
	306	if (outlen < MC_CMD_SENSOR_INFO_OUT_LENMIN)
	307	return -EIO;
	308
	309	mask = MCDI_DWORD(outbuf, SENSOR_INFO_OUT_MASK);
	310	n_sensors += hweight32(mask & ~(1 << MC_CMD_SENSOR_PAGE0_NEXT));
	311	++page;
	312	} while (mask & (1 << MC_CMD_SENSOR_PAGE0_NEXT));
	313	n_pages = page;
	314
	315	/* Don't create a device if there are none */
	316	if (n_sensors == 0)
55c5e0f8 BH	317	return 0;
55c5e0f8 BH	318
d4fbdcfe BH	319	rc = efx_nic_alloc_buffer(
	320	efx, &hwmon->dma_buf,
	321	n_sensors * MC_CMD_SENSOR_VALUE_ENTRY_TYPEDEF_LEN,
	322	GFP_KERNEL);
55c5e0f8 BH	323	if (rc)
	324	return rc;
	325
	326	mutex_init(&hwmon->update_lock);
	327	efx_mcdi_mon_update(efx);
	328
	329	/* Allocate space for the maximum possible number of
85493e6d	330	* attributes for this set of sensors:
55c5e0f8 BH	331	* value, min, max, crit, alarm and label for each sensor.
55c5e0f8 BH	332	*/
85493e6d	333	n_attrs = 6 * n_sensors;
55c5e0f8 BH	334	hwmon->attrs = kcalloc(n_attrs, sizeof(*hwmon->attrs), GFP_KERNEL);
	335	if (!hwmon->attrs) {
	336	rc = -ENOMEM;
	337	goto fail;
	338	}
85493e6d GR	339	hwmon->group.attrs = kcalloc(n_attrs + 1, sizeof(struct attribute *),
	340	GFP_KERNEL);
	341	if (!hwmon->group.attrs) {
	342	rc = -ENOMEM;
55c5e0f8 BH	343	goto fail;
	344	}
	345
d4fbdcfe BH	346	for (i = 0, j = -1, type = -1; ; i++) {
d4fbdcfe BH	347	enum efx_hwmon_type hwmon_type;
55c5e0f8 BH	348	const char *hwmon_prefix;
	349	unsigned hwmon_index;
	350	u16 min1, max1, min2, max2;
	351
	352	/* Find next sensor type or exit if there is none */
d4fbdcfe	353	do {
55c5e0f8	354	type++;
55c5e0f8	355
d4fbdcfe BH	356	if ((type % 32) == 0) {
	357	page = type / 32;
	358	j = -1;
	359	if (page == n_pages)
85493e6d	360	goto hwmon_register;
d4fbdcfe BH	361
	362	MCDI_SET_DWORD(inbuf, SENSOR_INFO_EXT_IN_PAGE,
	363	page);
	364	rc = efx_mcdi_rpc(efx, MC_CMD_SENSOR_INFO,
	365	inbuf, sizeof(inbuf),
	366	outbuf, sizeof(outbuf),
	367	&outlen);
	368	if (rc)
	369	goto fail;
	370	if (outlen < MC_CMD_SENSOR_INFO_OUT_LENMIN) {
	371	rc = -EIO;
	372	goto fail;
	373	}
	374
	375	mask = (MCDI_DWORD(outbuf,
	376	SENSOR_INFO_OUT_MASK) &
	377	~(1 << MC_CMD_SENSOR_PAGE0_NEXT));
	378
	379	/* Check again for short response */
	380	if (outlen <
	381	MC_CMD_SENSOR_INFO_OUT_LEN(hweight32(mask))) {
	382	rc = -EIO;
	383	goto fail;
	384	}
	385	}
	386	} while (!(mask & (1 << type % 32)));
	387	j++;
	388
	389	if (type < ARRAY_SIZE(efx_mcdi_sensor_type)) {
	390	hwmon_type = efx_mcdi_sensor_type[type].hwmon_type;
	391
	392	/* Skip sensors specific to a different port */
	393	if (hwmon_type != EFX_HWMON_UNKNOWN &&
	394	efx_mcdi_sensor_type[type].port >= 0 &&
	395	efx_mcdi_sensor_type[type].port !=
	396	efx_port_num(efx))
	397	continue;
	398	} else {
	399	hwmon_type = EFX_HWMON_UNKNOWN;
	400	}
55c5e0f8	401
d4fbdcfe	402	switch (hwmon_type) {
55c5e0f8 BH	403	case EFX_HWMON_TEMP:
	404	hwmon_prefix = "temp";
	405	hwmon_index = ++n_temp; /* 1-based */
	406	break;
	407	case EFX_HWMON_COOL:
	408	/* This is likely to be a heatsink, but there
	409	* is no convention for representing cooling
	410	* devices other than fans.
	411	*/
	412	hwmon_prefix = "fan";
	413	hwmon_index = ++n_cool; /* 1-based */
	414	break;
	415	default:
	416	hwmon_prefix = "in";
	417	hwmon_index = n_in++; /* 0-based */
	418	break;
38589cdc BH	419	case EFX_HWMON_CURR:
	420	hwmon_prefix = "curr";
	421	hwmon_index = ++n_curr; /* 1-based */
	422	break;
	423	case EFX_HWMON_POWER:
	424	hwmon_prefix = "power";
	425	hwmon_index = ++n_power; /* 1-based */
	426	break;
55c5e0f8 BH	427	}
	428
	429	min1 = MCDI_ARRAY_FIELD(outbuf, SENSOR_ENTRY,
d4fbdcfe	430	SENSOR_INFO_ENTRY, j, MIN1);
55c5e0f8	431	max1 = MCDI_ARRAY_FIELD(outbuf, SENSOR_ENTRY,
d4fbdcfe	432	SENSOR_INFO_ENTRY, j, MAX1);
55c5e0f8	433	min2 = MCDI_ARRAY_FIELD(outbuf, SENSOR_ENTRY,
d4fbdcfe	434	SENSOR_INFO_ENTRY, j, MIN2);
55c5e0f8	435	max2 = MCDI_ARRAY_FIELD(outbuf, SENSOR_ENTRY,
d4fbdcfe	436	SENSOR_INFO_ENTRY, j, MAX2);
55c5e0f8 BH	437
	438	if (min1 != max1) {
	439	snprintf(name, sizeof(name), "%s%u_input",
	440	hwmon_prefix, hwmon_index);
85493e6d	441	efx_mcdi_mon_add_attr(
55c5e0f8	442	efx, name, efx_mcdi_mon_show_value, i, type, 0);
55c5e0f8	443
38589cdc BH	444	if (hwmon_type != EFX_HWMON_POWER) {
	445	snprintf(name, sizeof(name), "%s%u_min",
	446	hwmon_prefix, hwmon_index);
85493e6d	447	efx_mcdi_mon_add_attr(
38589cdc BH	448	efx, name, efx_mcdi_mon_show_limit,
38589cdc BH	449	i, type, min1);
38589cdc	450	}
55c5e0f8 BH	451
	452	snprintf(name, sizeof(name), "%s%u_max",
	453	hwmon_prefix, hwmon_index);
85493e6d	454	efx_mcdi_mon_add_attr(
55c5e0f8 BH	455	efx, name, efx_mcdi_mon_show_limit,
55c5e0f8 BH	456	i, type, max1);
55c5e0f8 BH	457
	458	if (min2 != max2) {
	459	/* Assume max2 is critical value.
	460	* But we have no good way to expose min2.
	461	*/
	462	snprintf(name, sizeof(name), "%s%u_crit",
	463	hwmon_prefix, hwmon_index);
85493e6d	464	efx_mcdi_mon_add_attr(
55c5e0f8 BH	465	efx, name, efx_mcdi_mon_show_limit,
55c5e0f8 BH	466	i, type, max2);
55c5e0f8 BH	467	}
	468	}
	469
	470	snprintf(name, sizeof(name), "%s%u_alarm",
	471	hwmon_prefix, hwmon_index);
85493e6d	472	efx_mcdi_mon_add_attr(
55c5e0f8	473	efx, name, efx_mcdi_mon_show_alarm, i, type, 0);
55c5e0f8	474
d4fbdcfe BH	475	if (type < ARRAY_SIZE(efx_mcdi_sensor_type) &&
d4fbdcfe BH	476	efx_mcdi_sensor_type[type].label) {
55c5e0f8 BH	477	snprintf(name, sizeof(name), "%s%u_label",
55c5e0f8 BH	478	hwmon_prefix, hwmon_index);
85493e6d	479	efx_mcdi_mon_add_attr(
55c5e0f8	480	efx, name, efx_mcdi_mon_show_label, i, type, 0);
55c5e0f8 BH	481	}
	482	}
	483
85493e6d GR	484	hwmon_register:
	485	hwmon->groups[0] = &hwmon->group;
	486	hwmon->device = hwmon_device_register_with_groups(&efx->pci_dev->dev,
	487	KBUILD_MODNAME, NULL,
	488	hwmon->groups);
	489	if (IS_ERR(hwmon->device)) {
	490	rc = PTR_ERR(hwmon->device);
	491	goto fail;
	492	}
	493
	494	return 0;
	495
55c5e0f8 BH	496	fail:
	497	efx_mcdi_mon_remove(efx);
	498	return rc;
	499	}
	500
	501	void efx_mcdi_mon_remove(struct efx_nic *efx)
	502	{
e847b53e	503	struct efx_mcdi_mon *hwmon = efx_mcdi_mon(efx);
55c5e0f8	504
55c5e0f8 BH	505	if (hwmon->device)
55c5e0f8 BH	506	hwmon_device_unregister(hwmon->device);
85493e6d GR	507	kfree(hwmon->attrs);
85493e6d GR	508	kfree(hwmon->group.attrs);
55c5e0f8 BH	509	efx_nic_free_buffer(efx, &hwmon->dma_buf);
	510	}
	511
	512	#endif /* CONFIG_SFC_MCDI_MON */