xref: /freebsd-10.0-release/sys/dev/isci/scil/sci_object.h

/*-
 * This file is provided under a dual BSD/GPLv2 license.  When using or
 * redistributing this file, you may do so under either license.
 *
 * GPL LICENSE SUMMARY
 *
 * Copyright(c) 2008 - 2011 Intel Corporation. All rights reserved.
 *
 * This program is free software; you can redistribute it and/or modify
 * it under the terms of version 2 of the GNU General Public License as
 * published by the Free Software Foundation.
 *
 * This program is distributed in the hope that it will be useful, but
 * WITHOUT ANY WARRANTY; without even the implied warranty of
 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
 * General Public License for more details.
 *
 * You should have received a copy of the GNU General Public License
 * along with this program; if not, write to the Free Software
 * Foundation, Inc., 51 Franklin St - Fifth Floor, Boston, MA 02110-1301 USA.
 * The full GNU General Public License is included in this distribution
 * in the file called LICENSE.GPL.
 *
 * BSD LICENSE
 *
 * Copyright(c) 2008 - 2011 Intel Corporation. All rights reserved.
 * All rights reserved.
 *
 * Redistribution and use in source and binary forms, with or without
 * modification, are permitted provided that the following conditions
 * are met:
 *
 *   * Redistributions of source code must retain the above copyright
 *     notice, this list of conditions and the following disclaimer.
 *   * Redistributions in binary form must reproduce the above copyright
 *     notice, this list of conditions and the following disclaimer in
 *     the documentation and/or other materials provided with the
 *     distribution.
 *
 * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
 * "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
 * LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
 * A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
 * OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
 * SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
 * LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
 * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
 * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
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 * OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
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 * $FreeBSD$
 */
#ifndef _SCI_OBJECT_H_
#define _SCI_OBJECT_H_

/**
 * @file
 *
 * @brief This file contains all of the method and constants associated with
 *        the SCI base object.  The SCI base object is the class from which
 *        all other objects derive in the Storage Controller Interface.
 */

#ifdef __cplusplus
extern "C" {
#endif // __cplusplus

#include <dev/isci/scil/sci_types.h>
#include <dev/isci/scil/sci_status.h>

/**
 * @brief This method returns the object to which a previous association was
 *        created.  This association represents a link between an SCI object
 *        and another SCI object or potentially a user object.  The
 *        association essentially acts as a cookie for the user of an object.
 *        The user of an SCI object is now able to retrieve a handle to their
 *        own object that is managing, or related in someway, to said SCI
 *        object.
 *
 * @param[in]  base_object This parameter specifies the SCI object for
 *             which to retrieve the association reference.
 *
 * @return This method returns a pointer to the object that was previously
 *         associated to the supplied base_object parameter.
 * @retval SCI_INVALID_HANDLE This value is returned when there is no known
 *         association for the supplied base_object instance.
 */
#if defined(SCI_OBJECT_USE_ASSOCIATION_FUNCTIONS)
void * sci_object_get_association(
   SCI_OBJECT_HANDLE_T  base_object
);
#else
#define sci_object_get_association(object) (*((void **)object))
#endif

/**
 * @brief This method will associate to SCI objects.
 *
 * @see   For more information about associations please reference the
 *        sci_object_get_association() method.
 *
 * @param[in]  base_object This parameter specifies the SCI object for
 *             which to set the association reference.
 * @param[in]  associated_object This parameter specifies a pointer to the
 *             object being associated.
 *
 * @return This method will return an indication as to whether the
 *         association was set successfully.
 * @retval SCI_SUCCESS This value is currently always returned.
 */
#if defined(SCI_OBJECT_USE_ASSOCIATION_FUNCTIONS)
SCI_STATUS sci_object_set_association(
   SCI_OBJECT_HANDLE_T   base_object,
   void                * associated_object
);
#else
#define sci_object_set_association(base_object, associated_object) \
   ((*((void **)base_object)) = (associated_object))
#endif

/**
 * @brief This method will get the logger for an object.
 *
 * @param[in] object This parameter specifies SCI object for
 *       which to retrieve its logger.
 *
 * @return This method returns a SCI_LOGGER_HANDLE to SCI user.
 */
SCI_LOGGER_HANDLE_T sci_object_get_logger(
   SCI_OBJECT_HANDLE_T object
);

#ifdef __cplusplus
}
#endif // __cplusplus

#endif // _SCI_OBJECT_H_