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freebsd-dev/sys/dev/isci/scil/scic_controller.h
Pedro F. Giffuni 718cf2ccb9 sys/dev: further adoption of SPDX licensing ID tags. 
Mainly focus on files that use BSD 2-Clause license, however the tool I
was using misidentified many licenses so this was mostly a manual - error
prone - task.

The Software Package Data Exchange (SPDX) group provides a specification
to make it easier for automated tools to detect and summarize well known
opensource licenses. We are gradually adopting the specification, noting
that the tags are considered only advisory and do not, in any way,
superceed or replace the license texts.
2017-11-27 14:52:40 +00:00

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/*-
* 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
* (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_CONTROLLER_H_
#define _SCIC_CONTROLLER_H_
/**
* @file
*
* @brief This file contains all of the interface methods that can be called
* by an SCIC user on a controller object.
*/
#ifdef __cplusplus
extern "C" {
#endif // __cplusplus
#include <dev/isci/scil/sci_types.h>
#include <dev/isci/scil/sci_status.h>
#include <dev/isci/scil/sci_controller.h>
#include <dev/isci/scil/scic_config_parameters.h>
/**
* @enum
*
* Allowed PORT configuration modes
*
* APC Automatic PORT configuration mode is defined by the OEM configuration
* parameters providing no PHY_MASK parameters for any PORT. i.e. There are
* no phys assigned to any of the ports at start.
*
* MPC Manual PORT configuration mode is defined by the OEM configuration
* parameters providing a PHY_MASK value for any PORT. It is assumed that
* any PORT with no PHY_MASK is an invalid port and not all PHYs must be
* assigned. A PORT_PHY mask that assigns just a single PHY to a port and no
* other PHYs being assigned is sufficient to declare manual PORT configuration.
*/
enum SCIC_PORT_CONFIGURATION_MODE
{
SCIC_PORT_MANUAL_CONFIGURATION_MODE,
SCIC_PORT_AUTOMATIC_CONFIGURATION_MODE
};
/**
* @enum _SCIC_INTERRUPT_TYPE
*
* @brief This enumeration depicts the various types of interrupts that
* are potentially supported by a SCI Core implementation.
*/
typedef enum _SCIC_INTERRUPT_TYPE
{
SCIC_LEGACY_LINE_INTERRUPT_TYPE,
SCIC_MSIX_INTERRUPT_TYPE,
/**
* This enumeration value indicates the use of polling.
*/
SCIC_NO_INTERRUPTS
} SCIC_INTERRUPT_TYPE;
/**
* @typedef SCIC_CONTROLLER_INTERRUPT_HANDLER
*
* @brief This method is called by the SCI user in order to have the SCI
* implementation handle the interrupt. This method performs
* minimal processing to allow for streamlined interrupt time usage.
* @note
* TRUE: returned if there is an interrupt to process and it was
* processed.
* FALSE: returned if no interrupt was processed.
*
*/
typedef BOOL (*SCIC_CONTROLLER_INTERRUPT_HANDLER)(
SCI_CONTROLLER_HANDLE_T controller
);
/**
* @brief This method is called by the SCI user to process completions
* generated as a result of a previously handled interrupt. This
* method will result in the completion of IO requests and handling
* of other controller generated events. This method should be
* called some time after the interrupt handler.
*
* @note Most, if not all, of the user callback APIs are invoked from within
* this API. As a result, the user should be cognizant of the operating
* level at which they invoke this API.
*
*/
typedef void (*SCIC_CONTROLLER_COMPLETION_HANDLER)(
SCI_CONTROLLER_HANDLE_T controller
);
/**
* @struct SCIC_CONTROLLER_HANDLER_METHODS
*
* @brief This structure contains an interrupt handler and completion
* handler function pointers.
*/
typedef struct SCIC_CONTROLLER_HANDLER_METHODS
{
SCIC_CONTROLLER_INTERRUPT_HANDLER interrupt_handler;
SCIC_CONTROLLER_COMPLETION_HANDLER completion_handler;
} SCIC_CONTROLLER_HANDLER_METHODS_T;
/**
* @brief This method will attempt to construct a controller object
* utilizing the supplied parameter information.
*
* @param[in] library This parameter specifies the handle to the library
* object associated with the controller being constructed.
* @param[in] controller This parameter specifies the controller to be
* constructed.
* @param[in] user_object This parameter is a reference to the SCIL users
* controller object and will be used to associate with the core
* controller.
*
* @return Indicate if the controller was successfully constructed or if
* it failed in some way.
* @retval SCI_SUCCESS This value is returned if the controller was
* successfully constructed.
* @retval SCI_WARNING_TIMER_CONFLICT This value is returned if the
* interrupt coalescence timer may cause SAS compliance issues
* for SMP Target mode response processing.
* @retval SCI_FAILURE_UNSUPPORTED_CONTROLLER_TYPE This value is returned if
* the controller does not support the supplied type.
* @retval SCI_FAILURE_UNSUPPORTED_INIT_DATA_VERSION This value is returned
* if the controller does not support the supplied initialization
* data version.
*/
SCI_STATUS scic_controller_construct(
SCI_LIBRARY_HANDLE_T library,
SCI_CONTROLLER_HANDLE_T controller,
void * user_object
);
/**
* @brief This method will enable all controller interrupts.
*
* @param[in] controller This parameter specifies the controller for which
* to enable interrupts.
*
* @return none
*/
void scic_controller_enable_interrupts(
SCI_CONTROLLER_HANDLE_T controller
);
/**
* @brief This method will disable all controller interrupts.
*
* @param[in] controller This parameter specifies the controller for which
* to disable interrupts.
*
* @return none
*/
void scic_controller_disable_interrupts(
SCI_CONTROLLER_HANDLE_T controller
);
/**
* @brief This method will return provide function pointers for the
* interrupt handler and completion handler. The interrupt handler
* is expected to be invoked at interrupt time. The completion
* handler is scheduled to run as a result of the interrupt handler.
* The completion handler performs the bulk work for processing
* silicon events.
*
* @param[in] interrupt_type This parameter informs the core which type
* of interrupt/completion methods are being requested. These
* are the types: SCIC_LEGACY_LINE_INTERRUPT_TYPE,
* SCIC_MSIX_INTERRUPT_TYPE, SCIC_NO_INTERRUPTS (POLLING)
* @param[in] message_count This parameter informs the core the
* number of MSI-X messages to be utilized. This parameter must
* be 0 when requesting legacy line based handlers.
* @param[in] handler_methods The caller provides a pointer to a buffer of
* type SCIC_CONTROLLER_HANDLER_METHODS_T. The size depends on
* the combination of the interrupt_type and message_count input
* parameters:
* SCIC_LEGACY_LINE_INTERRUPT_TYPE:
* - size = sizeof(SCIC_CONTROLLER_HANDLER_METHODS_T)
* SCIC_MSIX_INTERRUPT_TYPE:
* - size = message_count*sizeof(SCIC_CONTROLLER_HANDLER_METHODS_T)
* @param[out] handler_methods SCIC fills out the caller's buffer with the
* appropriate interrupt and completion handlers based on the info
* provided in the interrupt_type and message_count input
* parameters. For SCIC_LEGACY_LINE_INTERRUPT_TYPE, the buffer
* receives a single SCIC_CONTROLLER_HANDLER_METHODS_T element
* regardless that the message_count parameter is zero.
* For SCIC_MSIX_INTERRUPT_TYPE, the buffer receives an array of
* elements of type SCIC_CONTROLLER_HANDLER_METHODS_T where the
* array size is equivalent to the message_count parameter. The
* array is zero-relative where entry zero corresponds to
* message-vector zero, entry one corresponds to message-vector one,
* and so forth.
*
* @return Indicate if the handler retrieval operation was successful.
* @retval SCI_SUCCESS This value is returned if retrieval succeeded.
* @retval SCI_FAILURE_UNSUPPORTED_MESSAGE_COUNT This value is returned
* if the user supplied an unsupported number of MSI-X messages.
* For legacy line interrupts the only valid value is 0.
*/
SCI_STATUS scic_controller_get_handler_methods(
SCIC_INTERRUPT_TYPE interrupt_type,
U16 message_count,
SCIC_CONTROLLER_HANDLER_METHODS_T * handler_methods
);
/**
* @brief This method will initialize the controller hardware managed by
* the supplied core controller object. This method will bring the
* physical controller hardware out of reset and enable the core to
* determine the capabilities of the hardware being managed. Thus,
* the core controller can determine it's exact physical (DMA capable)
* memory requirements.
*
* @pre The SCI Core user must have called scic_controller_construct()
* on the supplied controller object previously.
*
* @param[in] controller This parameter specifies the controller to be
* initialized.
*
* @return Indicate if the controller was successfully initialized or if
* it failed in some way.
* @retval SCI_SUCCESS This value is returned if the controller hardware
* was successfully initialized.
*/
SCI_STATUS scic_controller_initialize(
SCI_CONTROLLER_HANDLE_T controller
);
/**
* @brief This method returns the suggested scic_controller_start()
* timeout amount. The user is free to use any timeout value,
* but this method provides the suggested minimum start timeout
* value. The returned value is based upon empirical information
* determined as a result of interoperability testing.
*
* @param[in] controller the handle to the controller object for which
* to return the suggested start timeout.
*
* @return This method returns the number of milliseconds for the
* suggested start operation timeout.
*/
U32 scic_controller_get_suggested_start_timeout(
SCI_CONTROLLER_HANDLE_T controller
);
/**
* @brief This method will start the supplied core controller. This method
* will start the staggered spin up operation. The SCI User completion
* callback is called when the following conditions are met:
* -# the return status of this method is SCI_SUCCESS.
* -# after all of the phys have successfully started or been given
* the opportunity to start.
*
* @pre The SCI Core user must have filled in the physical memory
* descriptor structure via the
* sci_controller_get_memory_descriptor_list() method.
* @pre The SCI Core user must have invoked the scic_controller_initialize()
* method prior to invoking this method.
*
* @pre The controller must be in the INITIALIZED or STARTED state.
*
* @param[in] controller the handle to the controller object to start.
* @param[in] timeout This parameter specifies the number of milliseconds
* in which the start operation should complete.
*
* @return Indicate if the controller start method succeeded or failed in
* some way.
* @retval SCI_SUCCESS if the start operation succeeded.
* @retval SCI_WARNING_ALREADY_IN_STATE if the controller is already in
* the STARTED state.
* @retval SCI_FAILURE_INVALID_STATE if the controller is not either in
* the INITIALIZED or STARTED states.
* @retval SCI_FAILURE_INVALID_MEMORY_DESCRIPTOR if there are
* inconsistent or invalid values in the supplied
* SCI_PHYSICAL_MEMORY_DESCRIPTOR array.
*/
SCI_STATUS scic_controller_start(
SCI_CONTROLLER_HANDLE_T controller,
U32 timeout
);
/**
* @brief This method will stop an individual controller object.This method
* will invoke the associated user callback upon completion. The
* completion callback is called when the following conditions are met:
* -# the method return status is SCI_SUCCESS.
* -# the controller has been quiesced.
* This method will ensure that all IO requests are quiesced, phys
* are stopped, and all additional operation by the hardware is halted.
*
* @pre The controller must be in the STARTED or STOPPED state.
*
* @param[in] controller the handle to the controller object to stop.
* @param[in] timeout This parameter specifies the number of milliseconds
* in which the stop operation should complete.
*
* @return Indicate if the controller stop method succeeded or failed in
* some way.
* @retval SCI_SUCCESS if the stop operation successfully began.
* @retval SCI_WARNING_ALREADY_IN_STATE if the controller is already in
* the STOPPED state.
* @retval SCI_FAILURE_INVALID_STATE if the controller is not either in
* the STARTED or STOPPED states.
*/
SCI_STATUS scic_controller_stop(
SCI_CONTROLLER_HANDLE_T controller,
U32 timeout
);
/**
* @brief This method will reset the supplied core controller regardless of
* the state of said controller. This operation is considered
* destructive. In other words, all current operations are wiped
* out. No IO completions for outstanding devices occur. Outstanding
* IO requests are not aborted or completed at the actual remote
* device.
*
* @param[in] controller the handle to the controller object to reset.
*
* @return Indicate if the controller reset method succeeded or failed in
* some way.
* @retval SCI_SUCCESS if the reset operation successfully started.
* @retval SCI_FATAL_ERROR if the controller reset operation is unable to
* complete.
*/
SCI_STATUS scic_controller_reset(
SCI_CONTROLLER_HANDLE_T controller
);
/**
* @brief This method is called by the SCI user to send/start an IO request.
* If the method invocation is successful, then the IO request has
* been queued to the hardware for processing.
*
* @warning
* - IO tags are a protected resource. It is incumbent upon the
* SCI Core user to ensure that each of the methods that may
* allocate or free available IO tags are handled in a mutually
* exclusive manner. This method is one of said methods requiring
* proper critical code section protection (e.g. semaphore,
* spin-lock, etc.).
* - For SATA, the user is required to manage NCQ tags. As a
* result, it is expected the user will have set the NCQ tag
* field in the host to device register FIS prior to calling
* this method. There is also a requirement for the user
* to call scic_stp_io_set_ncq_tag() prior to invoking the
* scic_controller_start_io() method.
*
* @param[in] controller the handle to the controller object for which
* to start an IO request.
* @param[in] remote_device the handle to the remote device object for which
* to start an IO request.
* @param[in] io_request the handle to the io request object to start.
* @param[in] io_tag This parameter specifies a previously allocated IO tag
* that the user desires to be utilized for this request.
* This parameter is optional. The user is allowed to supply
* SCI_CONTROLLER_INVALID_IO_TAG as the value for this parameter.
* @see scic_controller_allocate_tag() for more information
* on allocating a tag.
*
* @return Indicate if the controller successfully started the IO request.
* @retval SCI_IO_SUCCESS if the IO request was successfully started.
*
* @todo Determine the failure situations and return values.
*/
SCI_IO_STATUS scic_controller_start_io(
SCI_CONTROLLER_HANDLE_T controller,
SCI_REMOTE_DEVICE_HANDLE_T remote_device,
SCI_IO_REQUEST_HANDLE_T io_request,
U16 io_tag
);
#if !defined(DISABLE_TASK_MANAGEMENT)
/**
* @brief This method is called by the SCIC user to send/start a framework
* task management request.
*
* @warning
* - IO tags are a protected resource. It is incumbent upon the
* SCI Core user to ensure that each of the methods that may
* allocate or free available IO tags are handled in a mutually
* exclusive manner. This method is one of said methods requiring
* proper critical code section protection (e.g. semaphore,
* spin-lock, etc.).
* - The user must synchronize this task with completion queue
* processing. If they are not synchronized then it is possible
* for the io requests that are being managed by the task request
* can complete before starting the task request.
*
* @param[in] controller the handle to the controller object for which
* to start the task management request.
* @param[in] remote_device the handle to the remote device object for which
* to start the task management request.
* @param[in] task_request the handle to the task request object to start.
* @param[in] io_tag This parameter specifies a previously allocated IO tag
* that the user desires to be utilized for this request. Note
* this not the io_tag of the request being managed. It is to
* be utilized for the task request itself.
* This parameter is optional. The user is allowed to supply
* SCI_CONTROLLER_INVALID_IO_TAG as the value for this parameter.
* @see scic_controller_allocate_tag() for more information
* on allocating a tag.
*
* @return Indicate if the controller successfully started the IO request.
* @retval SCI_TASK_SUCCESS if the task request was successfully started.
* @retval SCI_TASK_FAILURE_REQUIRES_SCSI_ABORT This value is returned if
* there is/are task(s) outstanding that require termination or
* completion before this request can succeed.
*/
SCI_TASK_STATUS scic_controller_start_task(
SCI_CONTROLLER_HANDLE_T controller,
SCI_REMOTE_DEVICE_HANDLE_T remote_device,
SCI_TASK_REQUEST_HANDLE_T task_request,
U16 io_tag
);
/**
* @brief This method will perform core specific completion operations for
* task management request. After this method is invoked, the user should
* consider the task request as invalid until it is properly reused
* (i.e. re-constructed).
*
* @param[in] controller The handle to the controller object for which
* to complete the task management request.
* @param[in] remote_device The handle to the remote device object for which
* to complete the task management request.
* @param[in] task_request the handle to the task management request object
* to complete.
*
* @return Indicate if the controller successfully completed the task
* management request.
* @retval SCI_SUCCESS if the completion process was successful.
*/
SCI_STATUS scic_controller_complete_task(
SCI_CONTROLLER_HANDLE_T controller,
SCI_REMOTE_DEVICE_HANDLE_T remote_device,
SCI_TASK_REQUEST_HANDLE_T task_request
);
#else // !defined(DISABLE_TASK_MANAGEMENT)
#define scic_controller_start_task(controller, dev, task, tag) SCI_TASK_FAILURE
#define scic_controller_complete_task(controller, dev, task) SCI_FAILURE
#endif // !defined(DISABLE_TASK_MANAGEMENT)
/**
* @brief This method is called by the SCI Core user to terminate an ongoing
* (i.e. started) core IO request. This does not abort the IO request
* at the target, but rather removes the IO request from the host
* controller.
*
* @param[in] controller the handle to the controller object for which
* to terminate a request.
* @param[in] remote_device the handle to the remote device object for which
* to terminate a request.
* @param[in] request the handle to the io or task management request
* object to terminate.
*
* @return Indicate if the controller successfully began the terminate process
* for the IO request.
* @retval SCI_SUCCESS if the terminate process was successfully started for
* the request.
*
* @todo Determine the failure situations and return values.
*/
SCI_STATUS scic_controller_terminate_request(
SCI_CONTROLLER_HANDLE_T controller,
SCI_REMOTE_DEVICE_HANDLE_T remote_device,
SCI_IO_REQUEST_HANDLE_T request
);
/**
* @brief This method will perform core specific completion operations for
* an IO request. After this method is invoked, the user should
* consider the IO request as invalid until it is properly reused
* (i.e. re-constructed).
*
* @warning
* - IO tags are a protected resource. It is incumbent upon the
* SCI Core user to ensure that each of the methods that may
* allocate or free available IO tags are handled in a mutually
* exclusive manner. This method is one of said methods requiring
* proper critical code section protection (e.g. semaphore,
* spin-lock, etc.).
* - If the IO tag for a request was allocated, by the SCI Core user,
* using the scic_controller_allocate_io_tag() method, then it is
* the responsibility of the caller to invoke the
* scic_controller_free_io_tag() method to free the tag (i.e. this
* method will not free the IO tag).
*
* @param[in] controller The handle to the controller object for which
* to complete the IO request.
* @param[in] remote_device The handle to the remote device object for which
* to complete the IO request.
* @param[in] io_request the handle to the io request object to complete.
*
* @return Indicate if the controller successfully completed the IO request.
* @retval SCI_SUCCESS if the completion process was successful.
*/
SCI_STATUS scic_controller_complete_io(
SCI_CONTROLLER_HANDLE_T controller,
SCI_REMOTE_DEVICE_HANDLE_T remote_device,
SCI_IO_REQUEST_HANDLE_T io_request
);
/**
* @brief This method simply provides the user with a unique handle for a
* given SAS/SATA core port index.
*
* @param[in] controller This parameter represents the handle to the
* controller object from which to retrieve a port (SAS or
* SATA) handle.
* @param[in] port_index This parameter specifies the port index in
* the controller for which to retrieve the port handle.
* 0 <= port_index < maximum number of phys.
* @param[out] port_handle This parameter specifies the retrieved port handle
* to be provided to the caller.
*
* @return Indicate if the retrieval of the port handle was successful.
* @retval SCI_SUCCESS This value is returned if the retrieval was successful.
* @retval SCI_FAILURE_INVALID_PORT This value is returned if the supplied
* port id is not in the supported range.
*/
SCI_STATUS scic_controller_get_port_handle(
SCI_CONTROLLER_HANDLE_T controller,
U8 port_index,
SCI_PORT_HANDLE_T * port_handle
);
/**
* @brief This method simply provides the user with a unique handle for a
* given SAS/SATA phy index/identifier.
*
* @param[in] controller This parameter represents the handle to the
* controller object from which to retrieve a phy (SAS or
* SATA) handle.
* @param[in] phy_index This parameter specifies the phy index in
* the controller for which to retrieve the phy handle.
* 0 <= phy_index < maximum number of phys.
* @param[out] phy_handle This parameter specifies the retrieved phy handle
* to be provided to the caller.
*
* @return Indicate if the retrieval of the phy handle was successful.
* @retval SCI_SUCCESS This value is returned if the retrieval was successful.
* @retval SCI_FAILURE_INVALID_PHY This value is returned if the supplied phy
* id is not in the supported range.
*/
SCI_STATUS scic_controller_get_phy_handle(
SCI_CONTROLLER_HANDLE_T controller,
U8 phy_index,
SCI_PHY_HANDLE_T * phy_handle
);
/**
* @brief This method will allocate a tag from the pool of free IO tags.
* Direct allocation of IO tags by the SCI Core user is optional.
* The scic_controller_start_io() method will allocate an IO
* tag if this method is not utilized and the tag is not
* supplied to the IO construct routine. Direct allocation of IO tags
* may provide additional performance improvements in environments
* capable of supporting this usage model. Additionally, direct
* allocation of IO tags also provides additional flexibility to the
* SCI Core user. Specifically, the user may retain IO tags across
* the lives of multiple IO requests.
*
* @warning IO tags are a protected resource. It is incumbent upon the
* SCI Core user to ensure that each of the methods that may
* allocate or free available IO tags are handled in a mutually
* exclusive manner. This method is one of said methods requiring
* proper critical code section protection (e.g. semaphore,
* spin-lock, etc.).
*
* @param[in] controller the handle to the controller object for which to
* allocate the tag.
*
* @return An unsigned integer representing an available IO tag.
* @retval SCI_CONTROLLER_INVALID_IO_TAG This value is returned if there
* are no currently available tags to be allocated.
* @retval All return other values indicate a legitimate tag.
*/
U16 scic_controller_allocate_io_tag(
SCI_CONTROLLER_HANDLE_T controller
);
/**
* @brief This method will free an IO tag to the pool of free IO tags.
* This method provides the SCI Core user more flexibility with
* regards to IO tags. The user may desire to keep an IO tag after
* an IO request has completed, because they plan on re-using the
* tag for a subsequent IO request. This method is only legal if
* the tag was allocated via scic_controller_allocate_io_tag().
*
* @warning
* - IO tags are a protected resource. It is incumbent upon the
* SCI Core user to ensure that each of the methods that may
* allocate or free available IO tags are handled in a mutually
* exclusive manner. This method is one of said methods requiring
* proper critical code section protection (e.g. semaphore,
* spin-lock, etc.).
* - If the IO tag for a request was allocated, by the SCI Core user,
* using the scic_controller_allocate_io_tag() method, then it is
* the responsibility of the caller to invoke this method to free
* the tag.
*
* @param[in] controller This parameter specifies the handle to the
* controller object for which to free/return the tag.
* @param[in] io_tag This parameter represents the tag to be freed to the
* pool of available tags.
*
* @return This method returns an indication of whether the tag was
* successfully put back (freed) to the pool of available tags.
* @retval SCI_SUCCESS This return value indicates the tag was successfully
* placed into the pool of available IO tags.
* @retval SCI_FAILURE_INVALID_IO_TAG This value is returned if the supplied
* tag is not a valid IO tag value.
*/
SCI_STATUS scic_controller_free_io_tag(
SCI_CONTROLLER_HANDLE_T controller,
U16 io_tag
);
/**
* @brief This method returns the size of the core's scratch RAM.
*
* @return Size of the scratch RAM in dwords.
*/
U32 scic_controller_get_scratch_ram_size(
SCI_CONTROLLER_HANDLE_T controller
);
/**
* @brief This method allows the user to read a U32 from the core's
* scratch RAM.
*
* @param[in] controller This parameter represents the handle to the
* controller object for which to read scratch RAM.
* @param[in] offset The offset (in dwords) into the scratch RAM.
* @param[out] value The location where the read value should be stored.
*
* @return Indicate if the user specified a valid offset into the
* scratch RAM.
* @retval SCI_SUCCESS The scratch RAM was successfully read.
* @retval SCI_FAILURE_INVALID_PARAMETER_VALUE The user specified an
* invalid offset.
*/
SCI_STATUS scic_controller_read_scratch_ram_dword(
SCI_CONTROLLER_HANDLE_T controller,
U32 offset,
U32 * value
);
/**
* @brief This method allows the user to write a U32 to the core's
* scratch RAM.
*
* @param[in] controller This parameter represents the handle to the
* controller object for which to write scratch RAM.
* @param[in] offset The offset (in dwords) into the scratch RAM.
* @param[out] value The value to be written to scratch RAM.
*
* @return Indicate if the user specified a valid offset into the
* scratch RAM.
* @retval SCI_SUCCESS The scratch RAM was successfully written.
* @retval SCI_FAILURE_INVALID_PARAMETER_VALUE The user specified an
* invalid offset.
*/
SCI_STATUS scic_controller_write_scratch_ram_dword(
SCI_CONTROLLER_HANDLE_T controller,
U32 offset,
U32 value
);
/**
* @brief This method allows the user to configure the SCI core into
* either a performance mode or a memory savings mode.
*
* @param[in] controller This parameter represents the handle to the
* controller object for which to update the operating
* mode.
* @param[in] mode This parameter specifies the new mode for the
* controller.
*
* @return Indicate if the user successfully change the operating mode
* of the controller.
* @retval SCI_SUCCESS The user successfully updated the mode.
*/
SCI_STATUS scic_controller_set_mode(
SCI_CONTROLLER_HANDLE_T controller,
SCI_CONTROLLER_MODE mode
);
#if !defined(DISABLE_INTERRUPTS)
/**
* @brief This method allows the user to configure the interrupt coalescence.
*
* @param[in] controller This parameter represents the handle to the
* controller object for which its interrupt coalesce register
* is overridden.
*
* @param[in] coalesce_number Used to control the number of entries in the
* Completion Queue before an interrupt is generated. If the
* number of entries exceed this number, an interrupt will be
* generated. The valid range of the input is [0, 256].
* A setting of 0 results in coalescing being disabled.
* @param[in] coalesce_timeout Timeout value in microseconds. The valid range
* of the input is [0, 2700000] . A setting of 0 is allowed and
* results in no interrupt coalescing timeout.
*
* @return Indicate if the user successfully set the interrupt coalesce parameters.
* @retval SCI_SUCCESS The user successfully updated the interrutp coalescence.
* @retval SCI_FAILURE_INVALID_PARAMETER_VALUE The user input value is out of range.
*/
SCI_STATUS scic_controller_set_interrupt_coalescence(
SCI_CONTROLLER_HANDLE_T controller,
U32 coalesce_number,
U32 coalesce_timeout
);
/**
* @brief This method retrieves the interrupt coalescing values
*
* @param[in] controller This parameter specifies the controller for
* which its interrupt coalescing number is read.
*
* @param[out] coalesce_number, interrupt coalescing number read from controller.
*
* @param[out] coalesce_timeout, timeout value in microseconds.
*
* @return None
*/
void scic_controller_get_interrupt_coalescence(
SCI_CONTROLLER_HANDLE_T controller,
U32 * coalesce_number,
U32 * coalesce_timeout
);
#else // !defined(DISABLE_INTERRUPTS)
#define scic_controller_set_interrupt_coalescence(controller, num, timeout) \
SCI_FAILURE
#define scic_controller_get_interrupt_coalescence(controller, num, timeout)
#endif // !defined(DISABLE_INTERRUPTS)
/**
* @brief This method suspend the controller, reinitialize RAMs, then resume
* the controller.
*
* @param[in] controller This parameter specifies the controller which is transitioning.
*
* @param[in] restrict_completions This parameter specifies whether the controller should
* ignore completion processing for non-fastpath events. This will cause
* the completions to be thrown away.
*
* @return SCI_STATUS The status of controller transition.
*/
SCI_STATUS scic_controller_transition(
SCI_CONTROLLER_HANDLE_T controller,
BOOL restrict_completions
);
/**
* @brief This method suspends the controller.
*
* @param[in] controller This parameter specifies the controller which is to be suspended.
*
* @return SCI_STATUS The status of controller suspend.
*/
SCI_STATUS scic_controller_suspend(
SCI_CONTROLLER_HANDLE_T controller
);
/**
* @brief This method resumes the controller.
*
* @param[in] controller This parameter specifies the controller which is to be resumed.
*
* @return SCI_STATUS The status of controller resume.
*/
SCI_STATUS scic_controller_resume(
SCI_CONTROLLER_HANDLE_T controller
);
SCI_STATUS scic_controller_get_max_ports(
SCI_CONTROLLER_HANDLE_T controller,
U8 * count
);
SCI_STATUS scic_controller_get_max_phys(
SCI_CONTROLLER_HANDLE_T controller,
U8 * count
);
#ifdef __cplusplus
}
#endif // __cplusplus
#endif // _SCIC_CONTROLLER_H_
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