void pal_OEM_1S_ACCURACY_SENSOR_READING()

in meta-facebook/yv35-bb/src/ipmi/plat_ipmi.c [1078:1158]

• 75 lines of code
• 15 McCabe index (conditional complexity)

void pal_OEM_1S_ACCURACY_SENSOR_READING(ipmi_msg *msg)
{
	uint8_t status, sensor_num, option, sensor_report_status;
	uint8_t enable_sensor_scan = 0xC0; // following IPMI sensor status response
	uint8_t disable_sensor_scan = 0x80;
	int reading;

	if (msg->data_len != 2) {
		msg->completion_code = CC_INVALID_LENGTH;
		return;
	}

	if (enable_sensor_poll) {
		sensor_report_status = enable_sensor_scan;
	} else {
		sensor_report_status = disable_sensor_scan;
	}

	option = msg->data[1];
	sensor_num = msg->data[0];

	if (option == GET_SENSOR_CACHE_DATA) {
		if (enable_sensor_poll) {
			status = get_sensor_reading(sensor_num, &reading, get_from_cache);
		} else {
			status = SENSOR_POLLING_DISABLE;
		}
	} else if (option == GET_SENSOR_DATA) {
		status = get_sensor_reading(sensor_num, &reading, get_from_sensor);
	} else {
		status = SENSOR_UNSPECIFIED_ERROR;
	}

	switch (status) {
	case SENSOR_READ_SUCCESS:
		msg->data[0] = reading & 0xff;
		msg->data[1] = 0x00;
		msg->data[2] = sensor_report_status;
		msg->data_len = 3;
		msg->completion_code = CC_SUCCESS;
		break;
	case SENSOR_READ_ACUR_SUCCESS:
		msg->data[0] = (reading >> 8) & 0xff;
		msg->data[1] = reading & 0xff;
		msg->data[2] = sensor_report_status;
		msg->data_len = 3;
		msg->completion_code = CC_SUCCESS;
		break;
	case SENSOR_READ_4BYTE_ACUR_SUCCESS:
		memcpy(msg->data, &reading, sizeof(reading));
		msg->data[4] = sensor_report_status;
		msg->data_len = 5;
		msg->completion_code = CC_SUCCESS;
		break;
	case SENSOR_NOT_ACCESSIBLE:
	case SENSOR_INIT_STATUS:
		msg->data[0] = 0x00;
		msg->data[1] = 0x00;
		msg->data[2] = (sensor_report_status |
				0x20); // notice BMC about sensor temporary in not accessible status
		msg->data_len = 3;
		msg->completion_code = CC_SUCCESS;
		break;
	case SENSOR_POLLING_DISABLE:
		msg->completion_code =
			CC_SENSOR_NOT_PRESENT; // getting sensor cache while sensor polling disable
		break;
	case SENSOR_FAIL_TO_ACCESS:
		msg->completion_code = CC_NODE_BUSY; // transection error
		break;
	case SENSOR_NOT_FOUND:
		msg->completion_code = CC_INVALID_DATA_FIELD; // request sensor number not found
		break;
	case SENSOR_UNSPECIFIED_ERROR:
	default:
		msg->completion_code = CC_UNSPECIFIED_ERROR; // unknown error
		break;
	}

	return;
}