xref: /freebsd/sys/dev/isci/scil/scic_task_request.h (revision 95ee2897e98f5d444f26ed2334cc7c439f9c16c6)

/*-
 * 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.
 */
#ifndef _SCIC_TASK_REQUEST_H_
#define _SCIC_TASK_REQUEST_H_

/**
 * @file
 *
 * @brief This file contains the structures and interface methods that
 *        can be referenced and used by the SCI user for to utilize
 *        task management requests.
 */

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

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

#if !defined(DISABLE_TASK_MANAGEMENT)

/**
 * @brief This method simply returns the size required to build an SCI
 *        based task management request object.
 *
 * @return Return the size of the SCIC task request object.
 */
U32 scic_task_request_get_object_size(
   void
);

/**
 * @brief This method is called by the SCI user to construct all SCI Core
 *        task management requests, regardless of protocol.  Memory
 *        initialization and functionality common to all task request types
 *        is performed in this method.
 *
 * @note  The SCI core implementation will create an association between
 *        the user task request object and the core task request object.
 *
 * @param[in]  scic_controller the handle to the core controller object
 *             for which to build the task managmement request.
 * @param[in]  scic_remote_device the handle to the core remote device
 *             object for which to build the task management request.
 *             passed, then a copy of the request is built internally.  The
 *             request will be copied into the actual controller request
 *             memory when the task is allocated internally during the
 *             scic_controller_start_task() method.
 * @param[in]  io_tag This parameter specifies the IO tag to be associated
 *             with this request.  If SCI_CONTROLLER_INVALID_IO_TAG is
 *             passed, then a copy of the request is built internally.  The
 *             request will be copied into the actual controller request
 *             memory when the IO tag is allocated internally during the
 *             scic_controller_start_io() method.
 * @param[in]  user_task_request_object This parameter specifies the user
 *             task request to be utilized during construction.  This task
 *             pointer will become the associated object for the core
 *             task request object.
 * @param[in]  scic_task_request_memory This parameter specifies the memory
 *             location to be utilized when building the core request.
 * @param[out] new_scic_task_request_handle This parameter specifies a
 *             pointer to the handle the core will expect in further
 *             interactions with the core task request object.
 *
 * @return Indicate if the controller successfully built the task request.
 * @retval SCI_SUCCESS This value is returned if the task request was
 *         successfully built.
 */
SCI_STATUS scic_task_request_construct(
   SCI_CONTROLLER_HANDLE_T      scic_controller,
   SCI_REMOTE_DEVICE_HANDLE_T   scic_remote_device,
   U16                          io_tag,
   void                       * user_task_request_object,
   void                       * scic_task_request_memory,
   SCI_TASK_REQUEST_HANDLE_T  * new_scic_task_request_handle
);

/**
 * @brief This method is called by the SCI user to construct all SCI Core
 *        SSP task management requests.  Memory initialization and
 *        functionality common to all task request types is performed in
 *        this method.
 *
 * @param[out] scic_task_request This parameter specifies the handle
 *             to the core task request object for which to construct
 *             a SATA specific task management request.
 *
 * @return Indicate if the controller successfully built the task request.
 * @retval SCI_SUCCESS This value is returned if the task request was
 *         successfully built.
 */
SCI_STATUS scic_task_request_construct_ssp(
   SCI_TASK_REQUEST_HANDLE_T  scic_task_request
);

/**
 * @brief This method is called by the SCI user to construct all SCI Core
 *        SATA task management requests.  Memory initialization and
 *        functionality common to all task request types is performed in
 *        this method.
 *
 * @param[out] scic_task_request_handle This parameter specifies the
 *             handle to the core task request object for which to construct
 *             a SATA specific task management request.
 *
 * @return Indicate if the controller successfully built the task request.
 * @retval SCI_SUCCESS This value is returned if the task request was
 *         successfully built.
 */
SCI_STATUS scic_task_request_construct_sata(
   SCI_TASK_REQUEST_HANDLE_T  scic_task_request_handle
);

#else // !defined(DISABLE_TASK_MANAGEMENT)

#define scic_task_request_get_object_size() 0
#define scic_task_request_construct(controller, dev, tag, task, mem, handle) \
        SCI_FAILURE
#define scic_task_request_construct_ssp(task) SCI_FAILURE
#define scic_task_request_construct_sata(task) SCI_FAILURE

#endif // !defined(DISABLE_TASK_MANAGEMENT)

#ifdef __cplusplus
}
#endif // __cplusplus

#endif // _SCIC_TASK_REQUEST_H_