Commit 2b28485d authored by Rajaravi Krishna Katta's avatar Rajaravi Krishna Katta Committed by Oded Gabbay
Browse files

habanalabs: enable power info via HWMON framework 



Add support to retrieve following power info via HWMON:
- instantaneous power value
- highest value since last reset
- reset the highest place holder

Signed-off-by: default avatarRajaravi Krishna Katta <rkatta@habana.ai>
Reviewed-by: default avatarOded Gabbay <ogabbay@kernel.org>
Signed-off-by: default avatarOded Gabbay <ogabbay@kernel.org>
parent 2ee58fee

drivers/misc/habanalabs/common/habanalabs.h

+4 −0
Original line number Diff line number Diff line
@@ -2956,6 +2956,10 @@ int hl_set_voltage(struct hl_device *hdev, 
			int sensor_index, u32 attr, long value);

int hl_set_current(struct hl_device *hdev,

			int sensor_index, u32 attr, long value);

int hl_set_power(struct hl_device *hdev,

			int sensor_index, u32 attr, long value);

int hl_get_power(struct hl_device *hdev,

			int sensor_index, u32 attr, long *value);

void hw_sob_get(struct hl_hw_sob *hw_sob);

void hw_sob_put(struct hl_hw_sob *hw_sob);

void hl_encaps_handle_do_release(struct kref *ref);

drivers/misc/habanalabs/common/hwmon.c

+94 −0
Original line number Diff line number Diff line
@@ -236,6 +236,23 @@ static int hl_read(struct device *dev, enum hwmon_sensor_types type, 
		else

			rc = hl_get_pwm_info(hdev, channel, attr, val);

		break;

	case hwmon_power:

		switch (attr) {

		case hwmon_power_input:

			cpucp_attr = CPUCP_POWER_INPUT;

			break;

		case hwmon_power_input_highest:

			cpucp_attr = CPUCP_POWER_INPUT_HIGHEST;

			break;

		default:

			return -EINVAL;

		}



		if (use_cpucp_enum)

			rc = hl_get_power(hdev, channel, cpucp_attr, val);

		else

			rc = hl_get_power(hdev, channel, attr, val);

		break;

	default:

		return -EINVAL;

	}
@@ -316,6 +333,20 @@ static int hl_write(struct device *dev, enum hwmon_sensor_types type, 
		else

			hl_set_current(hdev, channel, attr, val);

		break;

	case hwmon_power:

		switch (attr) {

		case hwmon_power_reset_history:

			cpucp_attr = CPUCP_POWER_RESET_INPUT_HISTORY;

			break;

		default:

			return -EINVAL;

		}



		if (use_cpucp_enum)

			hl_set_power(hdev, channel, cpucp_attr, val);

		else

			hl_set_power(hdev, channel, attr, val);

		break;

	default:

		return -EINVAL;

	}
@@ -378,6 +409,15 @@ static umode_t hl_is_visible(const void *data, enum hwmon_sensor_types type, 
			return 0644;

		}

		break;

	case hwmon_power:

		switch (attr) {

		case hwmon_power_input:

		case hwmon_power_input_highest:

			return 0444;

		case hwmon_power_reset_history:

			return 0200;

		}

		break;

	default:

		break;

	}
@@ -633,6 +673,60 @@ int hl_set_current(struct hl_device *hdev, 
	return rc;

}



int hl_set_power(struct hl_device *hdev,

			int sensor_index, u32 attr, long value)

{

	struct cpucp_packet pkt;

	int rc;



	memset(&pkt, 0, sizeof(pkt));



	pkt.ctl = cpu_to_le32(CPUCP_PACKET_POWER_GET <<

				CPUCP_PKT_CTL_OPCODE_SHIFT);

	pkt.sensor_index = __cpu_to_le16(sensor_index);

	pkt.type = __cpu_to_le16(attr);

	pkt.value = __cpu_to_le64(value);



	rc = hdev->asic_funcs->send_cpu_message(hdev, (u32 *) &pkt, sizeof(pkt),

						0, NULL);



	if (rc)

		dev_err(hdev->dev,

			"Failed to set power of sensor %d, error %d\n",

			sensor_index, rc);



	return rc;

}



int hl_get_power(struct hl_device *hdev,

			int sensor_index, u32 attr, long *value)

{

	struct cpucp_packet pkt;

	u64 result;

	int rc;



	memset(&pkt, 0, sizeof(pkt));



	pkt.ctl = cpu_to_le32(CPUCP_PACKET_POWER_GET <<

				CPUCP_PKT_CTL_OPCODE_SHIFT);

	pkt.sensor_index = __cpu_to_le16(sensor_index);

	pkt.type = __cpu_to_le16(attr);



	rc = hdev->asic_funcs->send_cpu_message(hdev, (u32 *) &pkt, sizeof(pkt),

						0, &result);



	*value = (long) result;



	if (rc) {

		dev_err(hdev->dev,

			"Failed to get power of sensor %d, error %d\n",

			sensor_index, rc);

		*value = 0;

	}



	return rc;

}



int hl_hwmon_init(struct hl_device *hdev)

{

	struct device *dev = hdev->pdev ? &hdev->pdev->dev : hdev->dev;

drivers/misc/habanalabs/include/common/cpucp_if.h

+10 −0
Original line number Diff line number Diff line
@@ -598,6 +598,16 @@ enum cpucp_pll_type_attributes { 
	cpucp_pll_pci,

};



/*

 * cpucp_power_type aligns with hwmon_power_attributes

 * defined in Linux kernel hwmon.h file

 */

enum cpucp_power_type {

	CPUCP_POWER_INPUT = 8,

	CPUCP_POWER_INPUT_HIGHEST = 9,

	CPUCP_POWER_RESET_INPUT_HISTORY = 11

};



/*

 * MSI type enumeration table for all ASICs and future SW versions.

 * For future ASIC-LKD compatibility, we can only add new enumerations.