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/**
 * @file types_enum.h
 * @brief Definitions of enumerated types for the OPAE C API
 *
 * This file defines return and error codes, event and object types, states,
 * and flags as used or reported by OPAE C API functions.
 */

#ifndef __FPGA_TYPES_ENUM_H__
#define __FPGA_TYPES_ENUM_H__

/**
 * OPAE C API function return codes
 *
 * Every public API function exported by the OPAE C library will return one of
 * these codes. Usually, FPGA_OK denotes successful completion of the requested
 * operation, while any return code *other* than FPGA_OK indicates an error or
 * other deviation from the expected behavior. Users of the OPAE C API should
 * always check the return codes of the APIs they call, and not use output
 * parameters of functions that did not execute successfully.

 * The fpgaErrStr() function converts error codes into printable messages.
 *
 * OPAE also has a logging mechanism that allows a developer to get more
 * information about why a particular call failed with a specific message. If
 * enabled, any function that returns an error code different from FPGA_OK will
 * also print out a message with further details. This mechanism can be enabled
 * by setting the environment variable `LIBOPAE_LOG` to 1 before running the
 * respective application.
 */
typedef enum {
	FPGA_OK = 0,         /**< Operation completed successfully */
	FPGA_INVALID_PARAM,  /**< Invalid parameter supplied */
	FPGA_BUSY,           /**< Resource is busy */
	FPGA_EXCEPTION,      /**< An exception occurred */
	FPGA_NOT_FOUND,      /**< A required resource was not found */
	FPGA_NO_MEMORY,      /**< Not enough memory to complete operation */
	FPGA_NOT_SUPPORTED,  /**< Requested operation is not supported */
	FPGA_NO_DRIVER,      /**< Driver is not loaded */
	FPGA_NO_DAEMON,      /**< FPGA Daemon (fpgad) is not running */
	FPGA_NO_ACCESS,      /**< Insufficient privileges or permissions */
	FPGA_RECONF_ERROR    /**< Error while reconfiguring FPGA */
} fpga_result;

/**
 * FPGA events
 *
 * OPAE currently defines the following event types that applications can
 * register for. Note that not all FPGA resources and target platforms may
 * support all event types.
 */
typedef enum {
	FPGA_EVENT_INTERRUPT = 0,   /**< Interrupt generated by an accelerator */
	FPGA_EVENT_ERROR,           /**< Infrastructure error event */
	FPGA_EVENT_POWER_THERMAL    /**< Infrastructure thermal event */
} fpga_event_type;

/* TODO: consider adding lifecycle events in the future
 * to help with orchestration.  Need a complete specification
 * before including them in the API.  Proposed events:
 *	FPGA_EVENT_APPEAR
 *	FPGA_EVENT_DISAPPEAR
 *	FPGA_EVENT_CHANGE
 */

/** accelerator state */
typedef enum {
	/** accelerator is opened exclusively by another process */
	FPGA_ACCELERATOR_ASSIGNED = 0,
	/** accelerator is free to be opened */
	FPGA_ACCELERATOR_UNASSIGNED
} fpga_accelerator_state;

/**
 * OPAE FPGA resources (objects)
 *
 * These are the FPGA resources currently supported by the OPAE object model.
 */
typedef enum {
	/** FPGA_DEVICE objects represent FPGA devices and their management functionality.
	* These objects can be opened (typically requires a certain privilege level or
	* access permissions) and used for management functions like fpgaReconfigreSlot(). */
	FPGA_DEVICE = 0,
	/** FPGA_ACCELERATOR objects represent allocatable units for accessing
	* accelerated functions on the FPGA. They are frequently opened for
	* interacting via control registers (MMIO), shared memory, or other,
	* possibly platform-specific functions. */
	FPGA_ACCELERATOR
} fpga_objtype;

/**
 * Buffer flags
 *
 * These flags can be passed to the fpgaPrepareBuffer() function.
 */
enum fpga_buffer_flags {
	FPGA_BUF_PREALLOCATED = (1u << 0), /**< Use existing buffer */
	FPGA_BUF_QUIET = (1u << 1),        /**< Suppress error messages */
	FPGA_BUF_READ_ONLY = (1u << 2)     /**< Buffer is read-only */
};

/**
 * Open flags
 *
 * These flags can be passed to the fpgaOpen() function.
 */
enum fpga_open_flags {
	/** Open FPGA resource for shared access */
	FPGA_OPEN_SHARED = (1u << 0)
};

/**
 * Reconfiguration flags
 *
 * These flags can be passed to the fpgaReconfigureSlot() function.
 */
enum fpga_reconf_flags {
	/** Reconfigure the slot without checking if it is in use */
	FPGA_RECONF_FORCE = (1u << 0)
};

enum fpga_sysobject_flags {
	FPGA_OBJECT_SYNC = (1u << 0), /**< Synchronize data from driver */
	FPGA_OBJECT_GLOB = (1u << 1), /**< Treat names as glob expressions */
	FPGA_OBJECT_RAW =
		(1u << 2), /**< Read or write object data as raw bytes */
	FPGA_OBJECT_RECURSE_ONE =
		(1u
		 << 3), /**< Create subobjects one level down from containers */
	FPGA_OBJECT_RECURSE_ALL =
		(1u
		 << 4) /**< Create subobjects all levels from from containers */
};

enum fpga_sysobject_type {
	FPGA_OBJECT_CONTAINER =
		(1u << 0), /**< Represents a group of objects */
	FPGA_OBJECT_ATTRIBUTE =
		(1u << 1) /**< An object with an attribute value that can be
			       read/written */
};

/** fpga metrics types
* opae defines power,thermal, performance counter
* and afu metric types
*/
enum fpga_metric_type {
	FPGA_METRIC_TYPE_POWER,             // Metric power
	FPGA_METRIC_TYPE_THERMAL,           // Metric Thermal
	FPGA_METRIC_TYPE_PERFORMANCE_CTR,   // Metric Performance counter
	FPGA_METRIC_TYPE_AFU,               // Metric AFU
	FPGA_METRIC_TYPE_UNKNOWN            // Unknown
};

/** Metrics data type
*
*
*/
enum fpga_metric_datatype {
	FPGA_METRIC_DATATYPE_INT,       // Metric datatype integer
	FPGA_METRIC_DATATYPE_FLOAT,     // Metric datatype float
	FPGA_METRIC_DATATYPE_DOUBLE,    // Metric datatype double
	FPGA_METRIC_DATATYPE_BOOL,      // Metric datatype bool
	FPGA_METRIC_DATATYPE_UNKNOWN    // Metric datatype unknown
};

#endif // __FPGA_TYPES_ENUM_H__