path: root/drivers/accel/habanalabs/common/hwmon.c

// SPDX-License-Identifier: GPL-2.0

/*
 * Copyright 2016-2019 HabanaLabs, Ltd.
 * All Rights Reserved.
 */

#include "habanalabs.h"

#include <linux/pci.h>
#include <linux/hwmon.h>

#define HWMON_NR_SENSOR_TYPES		(hwmon_max)

#ifdef _HAS_HWMON_HWMON_T_ENABLE

static u32 fixup_flags_legacy_fw(struct hl_device *hdev, enum hwmon_sensor_types type,
					u32 cpucp_flags)
{
	u32 flags;

	switch (type) {
	case hwmon_temp:
		flags = (cpucp_flags << 1) | HWMON_T_ENABLE;
		break;

	case hwmon_in:
		flags = (cpucp_flags << 1) | HWMON_I_ENABLE;
		break;

	case hwmon_curr:
		flags = (cpucp_flags << 1) | HWMON_C_ENABLE;
		break;

	case hwmon_fan:
		flags = (cpucp_flags << 1) | HWMON_F_ENABLE;
		break;

	case hwmon_power:
		flags = (cpucp_flags << 1) | HWMON_P_ENABLE;
		break;

	case hwmon_pwm:
		/* enable bit was here from day 1, so no need to adjust */
		flags = cpucp_flags;
		break;

	default:
		dev_err_ratelimited(hdev->dev, "unsupported h/w sensor type %d\n", type);
		flags = cpucp_flags;
		break;
	}

	return flags;
}

static u32 fixup_attr_legacy_fw(u32 attr)
{
	return (attr - 1);
}

#else

static u32 fixup_flags_legacy_fw(struct hl_device *hdev, enum hwmon_sensor_types type,
						u32 cpucp_flags)
{
	return cpucp_flags;
}

static u32 fixup_attr_legacy_fw(u32 attr)
{
	return attr;
}

#endif /* !_HAS_HWMON_HWMON_T_ENABLE */

static u32 adjust_hwmon_flags(struct hl_device *hdev, enum hwmon_sensor_types type, u32 cpucp_flags)
{
	u32 flags, cpucp_input_val;
	bool use_cpucp_enum;

	use_cpucp_enum = (hdev->asic_prop.fw_app_cpu_boot_dev_sts0 &
					CPU_BOOT_DEV_STS0_MAP_HWMON_EN) ? true : false;

	/* If f/w is using it's own enum, we need to check if the properties values are aligned.
	 * If not, it means we need to adjust the values to the new format that is used in the
	 * kernel since 5.6 (enum values were incremented by 1 by adding a new enable value).
	 */
	if (use_cpucp_enum) {
		switch (type) {
		case hwmon_temp:
			cpucp_input_val = cpucp_temp_input;
			if (cpucp_input_val == hwmon_temp_input)
				flags = cpucp_flags;
			else
				flags = (cpucp_flags << 1) | HWMON_T_ENABLE;
			break;

		case hwmon_in:
			cpucp_input_val = cpucp_in_input;
			if (cpucp_input_val == hwmon_in_input)
				flags = cpucp_flags;
			else
				flags = (cpucp_flags << 1) | HWMON_I_ENABLE;
			break;

		case hwmon_curr:
			cpucp_input_val = cpucp_curr_input;
			if (cpucp_input_val == hwmon_curr_input)
				flags = cpucp_flags;
			else
				flags = (cpucp_flags << 1) | HWMON_C_ENABLE;
			break;

		case hwmon_fan:
			cpucp_input_val = cpucp_fan_input;
			if (cpucp_input_val == hwmon_fan_input)
				flags = cpucp_flags;
			else
				flags = (cpucp_flags << 1) | HWMON_F_ENABLE;
			break;

		case hwmon_pwm:
			/* enable bit was here from day 1, so no need to adjust */
			flags = cpucp_flags;
			break;

		case hwmon_power:
			cpucp_input_val = CPUCP_POWER_INPUT;
			if (cpucp_input_val == hwmon_power_input)
				flags = cpucp_flags;
			else
				flags = (cpucp_flags << 1) | HWMON_P_ENABLE;
			break;

		default:
			dev_err_ratelimited(hdev->dev, "unsupported h/w sensor type %d\n", type);
			flags = cpucp_flags;
			break;
		}
	} else {
		flags = fixup_flags_legacy_fw(hdev, type, cpucp_flags);
	}

	return flags;
}

int hl_build_hwmon_channel_info(struct hl_device *hdev, struct cpucp_sensor *sensors_arr)
{
	u32 num_sensors_for_type, flags, num_active_sensor_types = 0, arr_size = 0, *curr_arr;
	u32 sensors_by_type_next_index[HWMON_NR_SENSOR_TYPES] = {0};
	u32 *sensors_by_type[HWMON_NR_SENSOR_TYPES] = {NULL};
	struct hwmon_channel_info **channels_info;
	u32 counts[HWMON_NR_SENSOR_TYPES] = {0};
	enum hwmon_sensor_types type;
	int rc, i, j;

	for (i = 0 ; i < CPUCP_MAX_SENSORS ; i++) {
		type = le32_to_cpu(sensors_arr[i].type);

		if ((type == 0) && (sensors_arr[i].flags ==