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// SPDX-License-Identifier: GPL-2.0
/* Copyright (C) 2023, Intel Corporation. */
#include "ice.h"
#include "ice_hwmon.h"
#include "ice_adminq_cmd.h"
#include <linux/hwmon.h>
#define TEMP_FROM_REG(reg) ((reg) * 1000)
static const struct hwmon_channel_info *ice_hwmon_info[] = {
HWMON_CHANNEL_INFO(temp,
HWMON_T_INPUT | HWMON_T_MAX |
HWMON_T_CRIT | HWMON_T_EMERGENCY),
NULL
};
static int ice_hwmon_read(struct device *dev, enum hwmon_sensor_types type,
u32 attr, int channel, long *val)
{
struct ice_aqc_get_sensor_reading_resp resp;
struct ice_pf *pf = dev_get_drvdata(dev);
int ret;
if (type != hwmon_temp)
return -EOPNOTSUPP;
ret = ice_aq_get_sensor_reading(&pf->hw, &resp);
if (ret) {
dev_warn_ratelimited(dev,
"%s HW read failure (%d)\n",
__func__,
ret);
return ret;
}
switch (attr) {
case hwmon_temp_input:
*val = TEMP_FROM_REG(resp.data.s0f0.temp);
break;
case hwmon_temp_max:
*val = TEMP_FROM_REG(resp.data.s0f0.temp_warning_threshold);
break;
case hwmon_temp_crit:
*val = TEMP_FROM_REG(resp.data.s0f0.temp_critical_threshold);
break;
case hwmon_temp_emergency:
*val = TEMP_FROM_REG(resp.data.s0f0.temp_fatal_threshold);
break;
default:
dev_dbg(dev, "%s unsupported attribute (%d)\n",
__func__, attr);
return -EOPNOTSUPP;
}
return 0;
}
static umode_t ice_hwmon_is_visible(const void *data,
enum hwmon_sensor_types type, u32 attr,
int channel)
{
if (type != hwmon_temp)
return 0;
switch (attr) {
case hwmon_temp_input:
case hwmon_temp_crit:
case hwmon_temp_max:
case hwmon_temp_emergency:
return 0444;
}
return 0;
}
static const struct hwmon_ops ice_hwmon_ops = {
.is_visible = ice_hwmon_is_visible,
.read = ice_hwmon_read
};
static const struct hwmon_chip_info ice_chip_info = {
.ops = &ice_hwmon_ops,
.info = ice_hwmon_info
};
static bool ice_is_internal_reading_supported(struct ice_pf *pf)
{
/* Only the first PF will report temperature for a chip.
* Note that internal temp reading is not supported
* for older FW (< v4.30).
*/
if (pf->hw.pf_id)
return false;
unsigned long sensors = pf->hw.dev_caps.supported_sensors;
return _test_bit(ICE_SENSOR_SUPPORT_E810_INT_TEMP_BIT, &sensors);
};
void ice_hwmon_init(struct ice_pf *pf)
{
struct device *dev = ice_pf_to_dev(pf);
struct device *hdev;
if (!ice_is_internal_reading_supported(pf))
return;
hdev = hwmon_device_register_with_info(dev, "ice", pf, &ice_chip_info,
NULL);
if (IS_ERR(hdev)) {
dev_warn(dev,
"hwmon_device_register_with_info returns error (%ld)",
PTR_ERR(hdev));
return;
}
pf->hwmon_dev = hdev;
}
void ice_hwmon_exit(struct ice_pf *pf)
{
if (!pf->hwmon_dev)
return;
hwmon_device_unregister(pf->hwmon_dev);
}
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