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531 lines
15 KiB
531 lines
15 KiB
// SPDX-License-Identifier: GPL-2.0-only |
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/**************************************************************************** |
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* Driver for Solarflare network controllers and boards |
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* Copyright 2011-2013 Solarflare Communications Inc. |
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*/ |
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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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|
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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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|
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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, /* voltage */ |
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EFX_HWMON_CURR, /* current */ |
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EFX_HWMON_POWER, /* power */ |
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EFX_HWMON_TYPES_COUNT |
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}; |
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|
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static const char *const efx_hwmon_unit[EFX_HWMON_TYPES_COUNT] = { |
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[EFX_HWMON_TEMP] = " degC", |
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[EFX_HWMON_COOL] = " rpm", /* though nonsense for a heatsink */ |
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[EFX_HWMON_IN] = " mV", |
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[EFX_HWMON_CURR] = " mA", |
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[EFX_HWMON_POWER] = " W", |
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}; |
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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[] = { |
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#define SENSOR(name, label, hwmon_type, port) \ |
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[MC_CMD_SENSOR_##name] = { label, EFX_HWMON_ ## hwmon_type, port } |
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SENSOR(CONTROLLER_TEMP, "Controller board temp.", TEMP, -1), |
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SENSOR(PHY_COMMON_TEMP, "PHY temp.", TEMP, -1), |
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SENSOR(CONTROLLER_COOLING, "Controller heat sink", COOL, -1), |
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SENSOR(PHY0_TEMP, "PHY temp.", TEMP, 0), |
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SENSOR(PHY0_COOLING, "PHY heat sink", COOL, 0), |
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SENSOR(PHY1_TEMP, "PHY temp.", TEMP, 1), |
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SENSOR(PHY1_COOLING, "PHY heat sink", COOL, 1), |
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SENSOR(IN_1V0, "1.0V supply", IN, -1), |
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SENSOR(IN_1V2, "1.2V supply", IN, -1), |
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SENSOR(IN_1V8, "1.8V supply", IN, -1), |
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SENSOR(IN_2V5, "2.5V supply", IN, -1), |
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SENSOR(IN_3V3, "3.3V supply", IN, -1), |
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SENSOR(IN_12V0, "12.0V supply", IN, -1), |
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SENSOR(IN_1V2A, "1.2V analogue supply", IN, -1), |
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SENSOR(IN_VREF, "Ref. voltage", IN, -1), |
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SENSOR(OUT_VAOE, "AOE FPGA supply", IN, -1), |
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SENSOR(AOE_TEMP, "AOE FPGA temp.", TEMP, -1), |
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SENSOR(PSU_AOE_TEMP, "AOE regulator temp.", TEMP, -1), |
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SENSOR(PSU_TEMP, "Controller regulator temp.", |
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TEMP, -1), |
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SENSOR(FAN_0, "Fan 0", COOL, -1), |
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SENSOR(FAN_1, "Fan 1", COOL, -1), |
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SENSOR(FAN_2, "Fan 2", COOL, -1), |
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SENSOR(FAN_3, "Fan 3", COOL, -1), |
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SENSOR(FAN_4, "Fan 4", COOL, -1), |
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SENSOR(IN_VAOE, "AOE input supply", IN, -1), |
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SENSOR(OUT_IAOE, "AOE output current", CURR, -1), |
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SENSOR(IN_IAOE, "AOE input current", CURR, -1), |
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SENSOR(NIC_POWER, "Board power use", POWER, -1), |
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SENSOR(IN_0V9, "0.9V supply", IN, -1), |
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SENSOR(IN_I0V9, "0.9V supply current", CURR, -1), |
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SENSOR(IN_I1V2, "1.2V supply current", CURR, -1), |
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SENSOR(IN_0V9_ADC, "0.9V supply (ext. ADC)", IN, -1), |
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SENSOR(CONTROLLER_2_TEMP, "Controller board temp. 2", TEMP, -1), |
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SENSOR(VREG_INTERNAL_TEMP, "Regulator die temp.", TEMP, -1), |
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SENSOR(VREG_0V9_TEMP, "0.9V regulator temp.", TEMP, -1), |
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SENSOR(VREG_1V2_TEMP, "1.2V regulator temp.", TEMP, -1), |
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SENSOR(CONTROLLER_VPTAT, |
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"Controller PTAT voltage (int. ADC)", IN, -1), |
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SENSOR(CONTROLLER_INTERNAL_TEMP, |
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"Controller die temp. (int. ADC)", TEMP, -1), |
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SENSOR(CONTROLLER_VPTAT_EXTADC, |
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"Controller PTAT voltage (ext. ADC)", IN, -1), |
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SENSOR(CONTROLLER_INTERNAL_TEMP_EXTADC, |
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"Controller die temp. (ext. ADC)", TEMP, -1), |
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SENSOR(AMBIENT_TEMP, "Ambient temp.", TEMP, -1), |
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SENSOR(AIRFLOW, "Air flow raw", IN, -1), |
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SENSOR(VDD08D_VSS08D_CSR, "0.9V die (int. ADC)", IN, -1), |
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SENSOR(VDD08D_VSS08D_CSR_EXTADC, "0.9V die (ext. ADC)", IN, -1), |
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SENSOR(HOTPOINT_TEMP, "Controller board temp. (hotpoint)", TEMP, -1), |
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#undef SENSOR |
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}; |
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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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[MC_CMD_SENSOR_STATE_NO_READING] = "No reading", |
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}; |
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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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enum efx_hwmon_type hwmon_type = EFX_HWMON_UNKNOWN; |
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const char *name = NULL, *state_txt, *unit; |
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|
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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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|
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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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hwmon_type = efx_mcdi_sensor_type[type].hwmon_type; |
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} |
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if (!name) |
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name = "No sensor name available"; |
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EFX_WARN_ON_PARANOID(state >= ARRAY_SIZE(sensor_status_names)); |
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state_txt = sensor_status_names[state]; |
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EFX_WARN_ON_PARANOID(hwmon_type >= EFX_HWMON_TYPES_COUNT); |
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unit = efx_hwmon_unit[hwmon_type]; |
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if (!unit) |
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unit = ""; |
|
|
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netif_err(efx, hw, efx->net_dev, |
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"Sensor %d (%s) reports condition '%s' for value %d%s\n", |
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type, name, state_txt, value, unit); |
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} |
|
|
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#ifdef CONFIG_SFC_MCDI_MON |
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|
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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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enum efx_hwmon_type hwmon_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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MCDI_DECLARE_BUF(inbuf, MC_CMD_READ_SENSORS_EXT_IN_LEN); |
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int rc; |
|
|
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MCDI_SET_QWORD(inbuf, READ_SENSORS_EXT_IN_DMA_ADDR, |
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hwmon->dma_buf.dma_addr); |
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MCDI_SET_DWORD(inbuf, READ_SENSORS_EXT_IN_LENGTH, hwmon->dma_buf.len); |
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|
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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 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->parent); |
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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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|
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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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|
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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, state; |
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int rc; |
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|
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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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|
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state = EFX_DWORD_FIELD(entry, MC_CMD_SENSOR_VALUE_ENTRY_TYPEDEF_STATE); |
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if (state == MC_CMD_SENSOR_STATE_NO_READING) |
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return -EBUSY; |
|
|
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value = EFX_DWORD_FIELD(entry, MC_CMD_SENSOR_VALUE_ENTRY_TYPEDEF_VALUE); |
|
|
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switch (mon_attr->hwmon_type) { |
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case EFX_HWMON_TEMP: |
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/* Convert temperature from degrees to milli-degrees Celsius */ |
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value *= 1000; |
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break; |
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case EFX_HWMON_POWER: |
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/* Convert power from watts to microwatts */ |
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value *= 1000000; |
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break; |
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default: |
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/* No conversion needed */ |
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break; |
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} |
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|
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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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|
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value = mon_attr->limit_value; |
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|
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switch (mon_attr->hwmon_type) { |
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case EFX_HWMON_TEMP: |
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/* Convert temperature from degrees to milli-degrees Celsius */ |
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value *= 1000; |
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break; |
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case EFX_HWMON_POWER: |
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/* Convert power from watts to microwatts */ |
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value *= 1000000; |
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break; |
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default: |
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/* No conversion needed */ |
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break; |
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} |
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|
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return sprintf(buf, "%u\n", value); |
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} |
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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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|
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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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|
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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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static void |
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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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struct efx_mcdi_mon *hwmon = efx_mcdi_mon(efx); |
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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)) |
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attr->hwmon_type = efx_mcdi_sensor_type[type].hwmon_type; |
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else |
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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; |
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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; |
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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 */
|
|
|