416 lines
12 KiB
C
416 lines
12 KiB
C
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/****************************************************************************
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* Driver for Solarflare Solarstorm network controllers and boards
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* Copyright 2011 Solarflare Communications Inc.
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*
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* This program is free software; you can redistribute it and/or modify it
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* under the terms of the GNU General Public License version 2 as published
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* by the Free Software Foundation, incorporated herein by reference.
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*/
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#include <linux/bitops.h>
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#include <linux/slab.h>
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#include <linux/hwmon.h>
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#include <linux/stat.h>
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#include "net_driver.h"
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#include "mcdi.h"
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#include "mcdi_pcol.h"
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#include "nic.h"
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enum efx_hwmon_type {
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EFX_HWMON_UNKNOWN,
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EFX_HWMON_TEMP, /* temperature */
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EFX_HWMON_COOL, /* cooling device, probably a heatsink */
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EFX_HWMON_IN /* input voltage */
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};
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static const struct {
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const char *label;
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enum efx_hwmon_type hwmon_type;
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int port;
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} efx_mcdi_sensor_type[MC_CMD_SENSOR_ENTRY_MAXNUM] = {
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#define SENSOR(name, label, hwmon_type, port) \
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[MC_CMD_SENSOR_##name] = { label, hwmon_type, port }
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SENSOR(CONTROLLER_TEMP, "Controller temp.", EFX_HWMON_TEMP, -1),
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SENSOR(PHY_COMMON_TEMP, "PHY temp.", EFX_HWMON_TEMP, -1),
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SENSOR(CONTROLLER_COOLING, "Controller cooling", EFX_HWMON_COOL, -1),
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SENSOR(PHY0_TEMP, "PHY temp.", EFX_HWMON_TEMP, 0),
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SENSOR(PHY0_COOLING, "PHY cooling", EFX_HWMON_COOL, 0),
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SENSOR(PHY1_TEMP, "PHY temp.", EFX_HWMON_TEMP, 1),
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SENSOR(PHY1_COOLING, "PHY cooling", EFX_HWMON_COOL, 1),
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SENSOR(IN_1V0, "1.0V supply", EFX_HWMON_IN, -1),
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SENSOR(IN_1V2, "1.2V supply", EFX_HWMON_IN, -1),
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SENSOR(IN_1V8, "1.8V supply", EFX_HWMON_IN, -1),
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SENSOR(IN_2V5, "2.5V supply", EFX_HWMON_IN, -1),
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SENSOR(IN_3V3, "3.3V supply", EFX_HWMON_IN, -1),
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SENSOR(IN_12V0, "12.0V supply", EFX_HWMON_IN, -1),
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SENSOR(IN_1V2A, "1.2V analogue supply", EFX_HWMON_IN, -1),
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SENSOR(IN_VREF, "ref. voltage", EFX_HWMON_IN, -1),
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#undef SENSOR
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};
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static const char *const sensor_status_names[] = {
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[MC_CMD_SENSOR_STATE_OK] = "OK",
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[MC_CMD_SENSOR_STATE_WARNING] = "Warning",
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[MC_CMD_SENSOR_STATE_FATAL] = "Fatal",
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[MC_CMD_SENSOR_STATE_BROKEN] = "Device failure",
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};
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void efx_mcdi_sensor_event(struct efx_nic *efx, efx_qword_t *ev)
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{
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unsigned int type, state, value;
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const char *name = NULL, *state_txt;
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type = EFX_QWORD_FIELD(*ev, MCDI_EVENT_SENSOREVT_MONITOR);
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state = EFX_QWORD_FIELD(*ev, MCDI_EVENT_SENSOREVT_STATE);
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value = EFX_QWORD_FIELD(*ev, MCDI_EVENT_SENSOREVT_VALUE);
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/* Deal gracefully with the board having more drivers than we
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* know about, but do not expect new sensor states. */
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if (type < ARRAY_SIZE(efx_mcdi_sensor_type))
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name = efx_mcdi_sensor_type[type].label;
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if (!name)
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name = "No sensor name available";
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EFX_BUG_ON_PARANOID(state >= ARRAY_SIZE(sensor_status_names));
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state_txt = sensor_status_names[state];
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netif_err(efx, hw, efx->net_dev,
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"Sensor %d (%s) reports condition '%s' for raw value %d\n",
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type, name, state_txt, value);
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}
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#ifdef CONFIG_SFC_MCDI_MON
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struct efx_mcdi_mon_attribute {
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struct device_attribute dev_attr;
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unsigned int index;
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unsigned int type;
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unsigned int limit_value;
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char name[12];
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};
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static int efx_mcdi_mon_update(struct efx_nic *efx)
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{
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struct efx_mcdi_mon *hwmon = efx_mcdi_mon(efx);
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u8 inbuf[MC_CMD_READ_SENSORS_IN_LEN];
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int rc;
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MCDI_SET_DWORD(inbuf, READ_SENSORS_IN_DMA_ADDR_LO,
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hwmon->dma_buf.dma_addr & 0xffffffff);
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MCDI_SET_DWORD(inbuf, READ_SENSORS_IN_DMA_ADDR_HI,
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(u64)hwmon->dma_buf.dma_addr >> 32);
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rc = efx_mcdi_rpc(efx, MC_CMD_READ_SENSORS,
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inbuf, sizeof(inbuf), NULL, 0, NULL);
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if (rc == 0)
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hwmon->last_update = jiffies;
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return rc;
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}
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static ssize_t efx_mcdi_mon_show_name(struct device *dev,
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struct device_attribute *attr,
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char *buf)
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{
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return sprintf(buf, "%s\n", KBUILD_MODNAME);
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}
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static int efx_mcdi_mon_get_entry(struct device *dev, unsigned int index,
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efx_dword_t *entry)
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{
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struct efx_nic *efx = dev_get_drvdata(dev);
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struct efx_mcdi_mon *hwmon = efx_mcdi_mon(efx);
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int rc;
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BUILD_BUG_ON(MC_CMD_READ_SENSORS_OUT_LEN != 0);
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mutex_lock(&hwmon->update_lock);
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/* Use cached value if last update was < 1 s ago */
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if (time_before(jiffies, hwmon->last_update + HZ))
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rc = 0;
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else
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rc = efx_mcdi_mon_update(efx);
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/* Copy out the requested entry */
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*entry = ((efx_dword_t *)hwmon->dma_buf.addr)[index];
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mutex_unlock(&hwmon->update_lock);
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return rc;
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}
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static ssize_t efx_mcdi_mon_show_value(struct device *dev,
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struct device_attribute *attr,
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char *buf)
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{
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struct efx_mcdi_mon_attribute *mon_attr =
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container_of(attr, struct efx_mcdi_mon_attribute, dev_attr);
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efx_dword_t entry;
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unsigned int value;
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int rc;
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rc = efx_mcdi_mon_get_entry(dev, mon_attr->index, &entry);
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if (rc)
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return rc;
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value = EFX_DWORD_FIELD(entry, MC_CMD_SENSOR_VALUE_ENTRY_TYPEDEF_VALUE);
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/* Convert temperature from degrees to milli-degrees Celsius */
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if (efx_mcdi_sensor_type[mon_attr->type].hwmon_type == EFX_HWMON_TEMP)
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value *= 1000;
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return sprintf(buf, "%u\n", value);
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}
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static ssize_t efx_mcdi_mon_show_limit(struct device *dev,
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struct device_attribute *attr,
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char *buf)
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{
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struct efx_mcdi_mon_attribute *mon_attr =
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container_of(attr, struct efx_mcdi_mon_attribute, dev_attr);
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unsigned int value;
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value = mon_attr->limit_value;
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/* Convert temperature from degrees to milli-degrees Celsius */
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if (efx_mcdi_sensor_type[mon_attr->type].hwmon_type == EFX_HWMON_TEMP)
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value *= 1000;
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return sprintf(buf, "%u\n", value);
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}
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static ssize_t efx_mcdi_mon_show_alarm(struct device *dev,
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struct device_attribute *attr,
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char *buf)
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{
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struct efx_mcdi_mon_attribute *mon_attr =
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container_of(attr, struct efx_mcdi_mon_attribute, dev_attr);
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efx_dword_t entry;
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int state;
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int rc;
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rc = efx_mcdi_mon_get_entry(dev, mon_attr->index, &entry);
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if (rc)
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return rc;
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state = EFX_DWORD_FIELD(entry, MC_CMD_SENSOR_VALUE_ENTRY_TYPEDEF_STATE);
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return sprintf(buf, "%d\n", state != MC_CMD_SENSOR_STATE_OK);
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}
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static ssize_t efx_mcdi_mon_show_label(struct device *dev,
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struct device_attribute *attr,
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char *buf)
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{
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struct efx_mcdi_mon_attribute *mon_attr =
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container_of(attr, struct efx_mcdi_mon_attribute, dev_attr);
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return sprintf(buf, "%s\n",
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efx_mcdi_sensor_type[mon_attr->type].label);
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}
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static int
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efx_mcdi_mon_add_attr(struct efx_nic *efx, const char *name,
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ssize_t (*reader)(struct device *,
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struct device_attribute *, char *),
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unsigned int index, unsigned int type,
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unsigned int limit_value)
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{
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struct efx_mcdi_mon *hwmon = efx_mcdi_mon(efx);
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struct efx_mcdi_mon_attribute *attr = &hwmon->attrs[hwmon->n_attrs];
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int rc;
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strlcpy(attr->name, name, sizeof(attr->name));
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attr->index = index;
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attr->type = type;
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attr->limit_value = limit_value;
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attr->dev_attr.attr.name = attr->name;
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attr->dev_attr.attr.mode = S_IRUGO;
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attr->dev_attr.show = reader;
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rc = device_create_file(&efx->pci_dev->dev, &attr->dev_attr);
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if (rc == 0)
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++hwmon->n_attrs;
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return rc;
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}
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int efx_mcdi_mon_probe(struct efx_nic *efx)
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{
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struct efx_mcdi_mon *hwmon = efx_mcdi_mon(efx);
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unsigned int n_attrs, n_temp = 0, n_cool = 0, n_in = 0;
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u8 outbuf[MC_CMD_SENSOR_INFO_OUT_LENMAX];
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size_t outlen;
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char name[12];
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u32 mask;
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int rc, i, type;
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BUILD_BUG_ON(MC_CMD_SENSOR_INFO_IN_LEN != 0);
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rc = efx_mcdi_rpc(efx, MC_CMD_SENSOR_INFO, NULL, 0,
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outbuf, sizeof(outbuf), &outlen);
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if (rc)
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return rc;
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if (outlen < MC_CMD_SENSOR_INFO_OUT_LENMIN)
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return -EIO;
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/* Find out which sensors are present. Don't create a device
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* if there are none.
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*/
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mask = MCDI_DWORD(outbuf, SENSOR_INFO_OUT_MASK);
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if (mask == 0)
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return 0;
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/* Check again for short response */
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if (outlen < MC_CMD_SENSOR_INFO_OUT_LEN(hweight32(mask)))
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return -EIO;
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rc = efx_nic_alloc_buffer(efx, &hwmon->dma_buf,
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4 * MC_CMD_SENSOR_ENTRY_MAXNUM);
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if (rc)
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return rc;
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mutex_init(&hwmon->update_lock);
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efx_mcdi_mon_update(efx);
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/* Allocate space for the maximum possible number of
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* attributes for this set of sensors: name of the driver plus
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* value, min, max, crit, alarm and label for each sensor.
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*/
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n_attrs = 1 + 6 * hweight32(mask);
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hwmon->attrs = kcalloc(n_attrs, sizeof(*hwmon->attrs), GFP_KERNEL);
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if (!hwmon->attrs) {
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rc = -ENOMEM;
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goto fail;
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}
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hwmon->device = hwmon_device_register(&efx->pci_dev->dev);
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if (IS_ERR(hwmon->device)) {
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rc = PTR_ERR(hwmon->device);
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goto fail;
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}
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rc = efx_mcdi_mon_add_attr(efx, "name", efx_mcdi_mon_show_name, 0, 0, 0);
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if (rc)
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goto fail;
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for (i = 0, type = -1; ; i++) {
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const char *hwmon_prefix;
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unsigned hwmon_index;
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u16 min1, max1, min2, max2;
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/* Find next sensor type or exit if there is none */
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type++;
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while (!(mask & (1 << type))) {
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type++;
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if (type == 32)
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return 0;
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}
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/* Skip sensors specific to a different port */
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if (efx_mcdi_sensor_type[type].hwmon_type != EFX_HWMON_UNKNOWN &&
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efx_mcdi_sensor_type[type].port >= 0 &&
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efx_mcdi_sensor_type[type].port != efx_port_num(efx))
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continue;
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switch (efx_mcdi_sensor_type[type].hwmon_type) {
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case EFX_HWMON_TEMP:
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hwmon_prefix = "temp";
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hwmon_index = ++n_temp; /* 1-based */
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break;
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case EFX_HWMON_COOL:
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/* This is likely to be a heatsink, but there
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* is no convention for representing cooling
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* devices other than fans.
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*/
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hwmon_prefix = "fan";
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hwmon_index = ++n_cool; /* 1-based */
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break;
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default:
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hwmon_prefix = "in";
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hwmon_index = n_in++; /* 0-based */
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break;
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}
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min1 = MCDI_ARRAY_FIELD(outbuf, SENSOR_ENTRY,
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SENSOR_INFO_ENTRY, i, MIN1);
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max1 = MCDI_ARRAY_FIELD(outbuf, SENSOR_ENTRY,
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SENSOR_INFO_ENTRY, i, MAX1);
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min2 = MCDI_ARRAY_FIELD(outbuf, SENSOR_ENTRY,
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SENSOR_INFO_ENTRY, i, MIN2);
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max2 = MCDI_ARRAY_FIELD(outbuf, SENSOR_ENTRY,
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SENSOR_INFO_ENTRY, i, MAX2);
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|
|
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 */
|