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// SPDX-License-Identifier: GPL-2.0-only
/*
* SolidRun DPU driver for control plane
*
* Copyright (C) 2022-2023 SolidRun
*
* Author: Alvaro Karsz <alvaro.karsz@solid-run.com>
*
*/
#include <linux/hwmon.h>
#include "snet_vdpa.h"
/* Monitor offsets */
#define SNET_MON_TMP0_IN_OFF 0x00
#define SNET_MON_TMP0_MAX_OFF 0x08
#define SNET_MON_TMP0_CRIT_OFF 0x10
#define SNET_MON_TMP1_IN_OFF 0x18
#define SNET_MON_TMP1_CRIT_OFF 0x20
#define SNET_MON_CURR_IN_OFF 0x28
#define SNET_MON_CURR_MAX_OFF 0x30
#define SNET_MON_CURR_CRIT_OFF 0x38
#define SNET_MON_PWR_IN_OFF 0x40
#define SNET_MON_VOLT_IN_OFF 0x48
#define SNET_MON_VOLT_CRIT_OFF 0x50
#define SNET_MON_VOLT_LCRIT_OFF 0x58
static void snet_hwmon_read_reg(struct psnet *psnet, u32 reg, long *out)
{
*out = psnet_read64(psnet, psnet->cfg.hwmon_off + reg);
}
static umode_t snet_howmon_is_visible(const void *data,
enum hwmon_sensor_types type,
u32 attr, int channel)
{
return 0444;
}
static int snet_howmon_read(struct device *dev, enum hwmon_sensor_types type,
u32 attr, int channel, long *val)
{
struct psnet *psnet = dev_get_drvdata(dev);
int ret = 0;
switch (type) {
case hwmon_in:
switch (attr) {
case hwmon_in_lcrit:
snet_hwmon_read_reg(psnet, SNET_MON_VOLT_LCRIT_OFF, val);
break;
case hwmon_in_crit:
snet_hwmon_read_reg(psnet, SNET_MON_VOLT_CRIT_OFF, val);
break;
case hwmon_in_input:
snet_hwmon_read_reg(psnet, SNET_MON_VOLT_IN_OFF, val);
break;
default:
ret = -EOPNOTSUPP;
break;
}
break;
case hwmon_power:
switch (attr) {
case hwmon_power_input:
snet_hwmon_read_reg(psnet, SNET_MON_PWR_IN_OFF, val);
break;
default:
ret = -EOPNOTSUPP;
break;
}
break;
case hwmon_curr:
switch (attr) {
case hwmon_curr_input:
snet_hwmon_read_reg(psnet, SNET_MON_CURR_IN_OFF, val);
break;
case hwmon_curr_max:
snet_hwmon_read_reg(psnet, SNET_MON_CURR_MAX_OFF, val);
break;
case hwmon_curr_crit:
snet_hwmon_read_reg(psnet, SNET_MON_CURR_CRIT_OFF, val);
break;
default:
ret = -EOPNOTSUPP;
break;
}
break;
case hwmon_temp:
switch (attr) {
case hwmon_temp_input:
if (channel == 0)
snet_hwmon_read_reg(psnet, SNET_MON_TMP0_IN_OFF, val);
else
snet_hwmon_read_reg(psnet, SNET_MON_TMP1_IN_OFF, val);
break;
case hwmon_temp_max:
if (channel == 0)
snet_hwmon_read_reg(psnet, SNET_MON_TMP0_MAX_OFF, val);
else
ret = -EOPNOTSUPP;
break;
case hwmon_temp_crit:
if (channel == 0)
snet_hwmon_read_reg(psnet, SNET_MON_TMP0_CRIT_OFF, val);
else
snet_hwmon_read_reg(psnet, SNET_MON_TMP1_CRIT_OFF, val);
break;
default:
ret = -EOPNOTSUPP;
break;
}
break;
default:
ret = -EOPNOTSUPP;
break;
}
return ret;
}
static int snet_hwmon_read_string(struct device *dev,
enum hwmon_sensor_types type, u32 attr,
int channel, const char **str)
{
int ret = 0;
switch (type) {
case hwmon_in:
*str = "main_vin";
break;
case hwmon_power:
*str = "soc_pin";
break;
case hwmon_curr:
*str = "soc_iin";
break;
case hwmon_temp:
if (channel == 0)
*str = "power_stage_temp";
else
*str = "ic_junction_temp";
break;
default:
ret = -EOPNOTSUPP;
break;
}
return ret;
}
static const struct hwmon_ops snet_hwmon_ops = {
.is_visible = snet_howmon_is_visible,
.read = snet_howmon_read,
.read_string = snet_hwmon_read_string
};
static const struct hwmon_channel_info * const snet_hwmon_info[] = {
HWMON_CHANNEL_INFO(temp, HWMON_T_INPUT | HWMON_T_MAX | HWMON_T_CRIT | HWMON_T_LABEL,
HWMON_T_INPUT | HWMON_T_CRIT | HWMON_T_LABEL),
HWMON_CHANNEL_INFO(power, HWMON_P_INPUT | HWMON_P_LABEL),
HWMON_CHANNEL_INFO(curr, HWMON_C_INPUT | HWMON_C_MAX | HWMON_C_CRIT | HWMON_C_LABEL),
HWMON_CHANNEL_INFO(in, HWMON_I_INPUT | HWMON_I_CRIT | HWMON_I_LCRIT | HWMON_I_LABEL),
NULL
};
static const struct hwmon_chip_info snet_hwmono_info = {
.ops = &snet_hwmon_ops,
.info = snet_hwmon_info,
};
/* Create an HW monitor device */
void psnet_create_hwmon(struct pci_dev *pdev)
{
struct device *hwmon;
struct psnet *psnet = pci_get_drvdata(pdev);
snprintf(psnet->hwmon_name, SNET_NAME_SIZE, "snet_%s", pci_name(pdev));
hwmon = devm_hwmon_device_register_with_info(&pdev->dev, psnet->hwmon_name, psnet,
&snet_hwmono_info, NULL);
/* The monitor is not mandatory, Just alert user in case of an error */
if (IS_ERR(hwmon))
SNET_WARN(pdev, "Failed to create SNET hwmon, error %ld\n", PTR_ERR(hwmon));
}
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