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Release 4.11 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 */
	
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); }

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#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; }

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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; }

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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); }

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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); }

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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); }

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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); }

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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; }

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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; }

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Total1016100.00%6100.00%


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); }

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#endif /* CONFIG_SFC_MCDI_MON */

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Michal Schmidt100.36%16.67%
Total2749100.00%15100.00%
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