freebsd-nq/sys/dev/isci/scil/scic_library.h

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/*-
* 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
* (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
* OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
*
* $FreeBSD$
*/
#ifndef _SCIC_LIBRARY_H_
#define _SCIC_LIBRARY_H_
/**
* @file
*
* @brief This file contains all of the interface methods that can be called
* by an SCI Core user on the library object. The library is the
* container of all other objects being managed (i.e. controllers,
* target devices, sas ports, etc.).
*/
#ifdef __cplusplus
extern "C" {
#endif // __cplusplus
#include <dev/isci/scil/sci_types.h>
#include <dev/isci/scil/sci_status.h>
/**
* @enum _SCIC_LIBRARY_IO_MODE
* @brief This enumeration depicts the different IO modes in which the SCI
* library and it's controllers can operate.
*/
typedef enum _SCIC_LIBRARY_IO_MODE
{
/**
* In this mode the SCI library will operate in a polling mode for
* operations. In other words, the library will not return from a
* send io method until the completion for the IO has been received.
*/
SCIC_IO_MODE_POLLING,
/**
* In this mode the SCI library returns after committing the IO request
* to the controller hardware. Completion of the request will occur
* asynchronously.
*/
SCIC_IO_MODE_ASYNCHRONOUS
} SCIC_LIBRARY_IO_MODE;
struct sci_pci_common_header;
/**
* @brief This method will contsruct the core library based on the supplied
* parameter information. By default, libraries are considered
* "ready" as soon as they are constructed.
*
* @param[in] library_memory a pointer to the memory at which the
* library object is located.
* @param[in] max_controller_count the maximum number of controllers that
* this library can manage.
*
* @return An opaque library handle to be used by the SCI user for all
* subsequent library operations.
*/
SCI_LIBRARY_HANDLE_T scic_library_construct(
void * library_memory,
U8 max_controller_count
);
/**
* This method sets the PCI header information required for proper
* controller object creation/allocation.
*
* @param[in] library the handle to the library object for which to allocate
* a controller.
* @param[in] pci_header a pointer to the pci header data for the pci
* device for which this library is being created.
*
* @return none
*/
void scic_library_set_pci_info(
SCI_LIBRARY_HANDLE_T library,
struct sci_pci_common_header * pci_header
);
/**
* @brief This method returns the size of the core library object.
*
* @param[in] max_controller_count the maximum number of controllers that
* this library can manage.
*
* @return a positive integer value indicating the size (in bytes) of the
* library object.
*/
U32 scic_library_get_object_size(
U8 max_controller_count
);
/**
*
*
*/
U8 scic_library_get_pci_device_controller_count(
SCI_LIBRARY_HANDLE_T library
);
/**
* @brief This method will allocate the next available core controller object
* that can be managed by this core library.
*
* @param[in] library the handle to the library object for which to allocate
* a controller.
* @param[out] new_controller This parameter specifies a pointer to the
* controller handle that was added to the library.
* @return Indicate if the controller was successfully allocated or if iti
* failed in some way.
* @retval SCI_SUCCESS if the controller was successfully allocated.
* @retval SCI_FAILURE_INSUFFICIENT_RESOURCES if the library has no more
* available controller objects to allocate.
*/
SCI_STATUS scic_library_allocate_controller(
SCI_LIBRARY_HANDLE_T library,
SCI_CONTROLLER_HANDLE_T * new_controller
);
/**
* @brief This method will attempt to free the supplied controller to the
* library.
*
* @param[in] library the handle to the library object for which to free
* a controller.
* @param[in] controller the handle to the controller object to be freed
* from the library.
*
* @return Indicate if the controller was successfully freed or if it failed
* in some way.
* @retval SCI_SUCCESS if the controller was successfully freed.
* @retval SCI_FAILURE_CONTROLLER_NOT_FOUND if the supplied controller is
* not managed by the supplied library.
*/
SCI_STATUS scic_library_free_controller(
SCI_LIBRARY_HANDLE_T library,
SCI_CONTROLLER_HANDLE_T controller
);
/**
* @brief This method returns the maximum size (in bytes) that an individual
* SGL element can address using this library.
*
* @note SGL size is restricted to the lowest common denominator across all
* controllers managed by the library.
* @todo Does the byte count have to be DWORD aligned?
*
* @param[in] library the handle to the library object for which to
* determine the maximum SGL size.
*
* @return Return the maximum size (in bytes) for an SGE for any controller
* managed by this library.
*/
U32 scic_library_get_max_sge_size(
SCI_LIBRARY_HANDLE_T library
);
/**
* @brief This method returns the maximum number of SGL elements for a
* single IO request using this library.
*
* @note SGE count is restricted to the lowest common denominator across all
* controllers managed by the library.
*
* @param[in] library the handle to the library object for which to
* determine the maximum number of SGEs per IO request.
*
* @return Return the maximum number of SGEs for an IO request for any
* controller in this library.
*/
U32 scic_library_get_max_sge_count(
SCI_LIBRARY_HANDLE_T library
);
/**
* @brief This method returns the maximum length for any IO request that
* can be handled by the underlying controllers
*
* @note IO length is restricted to the lowest common denominator across all
* controllers managed by the library.
*
* @param[in] library the handle to the library object for which to
* determine the maximum length for all IO requests.
*
* @return Return the maximum length for all IO requests for any
* controller in this library.
*/
U32 scic_library_get_max_io_length(
SCI_LIBRARY_HANDLE_T library
);
/**
* @brief This method returns the minimum number of timers needed. If the
* user supplies timers less then the number specified via this
* call, then the user runs the risk of improper operation.
*
* @return This method returns a value representing the minimum number of
* timers required by this framework implementation
*/
U16 scic_library_get_min_timer_count(
void
);
/**
* @brief This method returns the maximum number of timers that could
* be ever be in use by this component at a given time.
*
* @return This method returns a value representing the minimum number of
* timers required by this framework implementation
*/
U16 scic_library_get_max_timer_count(
void
);
#ifdef __cplusplus
}
#endif // __cplusplus
#endif // _SCIC_LIBRARY_H_