freebsd-dev/sys/dev/isci/scil/sci_base_library.h

/*-
 * SPDX-License-Identifier: BSD-2-Clause OR GPL-2.0
 *
 * 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_BASE_LIBRARY_H_
#define _SCI_BASE_LIBRARY_H_

/**
 * @file
 *
 * @brief This file contains the protected interface structures, constants
 *        and interface methods for the SCI_BASE_LIBRARY object.
 *
 */

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

#include <dev/isci/scil/sci_library.h>
#include <dev/isci/scil/sci_pool.h>
#include <dev/isci/scil/sci_base_object.h>
#include <dev/isci/scil/sci_base_logger.h>
#include <dev/isci/scil/sci_controller_constants.h>

/**
 * @struct SCI_BASE_LIBRARY
 *
 * @brief This structure contains all of the objects common to all library
 *        sub-objects.
 */
typedef struct SCI_BASE_LIBRARY
{
   /**
    * This class derives directly from the base object class.  As a result,
    * the field is named "parent" and is the first field contained in the
    * structure.
    */
   SCI_BASE_OBJECT_T  parent;

   /**
    * This field provides the logger object to be utilized by all objects
    * contained inside of a library.
    */
   SCI_BASE_LOGGER_T  logger;

   // Create a pool structure to manage free controller indices.
   SCI_POOL_CREATE(controller_id_pool, U16, SCI_MAX_CONTROLLERS);

} SCI_BASE_LIBRARY_T;


/**
 * @brief This method will construct the base library object.
 *
 * @param[in] this_library This parameter specifies the library object
 *            to be constructed.
 * @param[in] max_controllers This parameter specifies the maximum number
 *            of controllers to be supported by this library.
 *
 * @return none
 */
void sci_base_library_construct(
   SCI_BASE_LIBRARY_T * this_library,
   U32                  max_controllers
);

/**
 * This macro provides common code for allocating a controller from a library.
 * It will ensure that we successfully allocate an available controller index
 * and return SCI_FAILURE_INSUFFICIENT_RESOURCES if unsuccessful.
 */
#define SCI_BASE_LIBRARY_ALLOCATE_CONTROLLER( \
   library, \
   controller_ptr, \
   rc \
) \
{ \
   U16 index; \
   *rc = SCI_SUCCESS; \
   if (! sci_pool_empty((library)->parent.controller_id_pool)) \
   { \
      sci_pool_get((library)->parent.controller_id_pool, index); \
      *controller_ptr = (SCI_CONTROLLER_HANDLE_T) \
                        & (library)->controllers[index]; \
   } \
   else \
      *rc = SCI_FAILURE_INSUFFICIENT_RESOURCES; \
}

/**
 * This macro provides common code for freeing a controller to a library.
 * It calculates the index to the controller instance in the array by
 * determining the offset.
 */
#define SCI_BASE_LIBRARY_FREE_CONTROLLER( \
   library, \
   controller, \
   CONTROLLER_TYPE, \
   rc \
) \
{ \
   U16 index = (U16) \
               ((((char *)(controller)) - ((char *)(library)->controllers))\
                / sizeof(CONTROLLER_TYPE)); \
   *rc = SCI_SUCCESS; \
   if (  (index < SCI_MAX_CONTROLLERS) \
      && (! sci_pool_full((library)->parent.controller_id_pool)) ) \
   { \
      sci_pool_put((library)->parent.controller_id_pool, index); \
   } \
   else \
      *rc = SCI_FAILURE_CONTROLLER_NOT_FOUND; \
}



/**
 * This macro provides common code for constructing library. It
 * It initialize and fill the library's controller_id_pool.
 */
#define SCI_BASE_LIBRARY_CONSTRUCT( \
   library, \
   base_library, \
   max_controllers, \
   CONTROLLER_TYPE, \
   status \
) \
{ \
   U32 controller_index; \
   sci_base_object_construct(&(base_library)->parent, &(base_library)->logger); \
   sci_pool_initialize((base_library)->controller_id_pool); \
   for (controller_index = 0; controller_index < max_controller_count; controller_index++) \
   { \
      SCI_BASE_LIBRARY_FREE_CONTROLLER( \
         library, \
         &library->controllers[controller_index], \
         CONTROLLER_TYPE, \
         &status \
      ); \
   } \
}

#ifdef __cplusplus
}
#endif // __cplusplus

#endif // _SCI_BASE_LIBRARY_H_