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| Current File : //sys/dev/isci/scil/scif_sas_remote_device_states.c |
/*-
* 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.
*/
#include <sys/cdefs.h>
__FBSDID("$FreeBSD: release/9.1.0/sys/dev/isci/scil/scif_sas_remote_device_states.c 231689 2012-02-14 15:58:49Z jimharris $");
/**
* @file
*
* @brief
*/
#include <dev/isci/scil/scic_remote_device.h>
#include <dev/isci/scil/scif_sas_remote_device.h>
#include <dev/isci/scil/scif_sas_domain.h>
#include <dev/isci/scil/scif_sas_logger.h>
/**
* This constant indicates the number of milliseconds to wait for the core
* to start/stop it's remote device object.
*/
//#define SCIF_SAS_REMOTE_DEVICE_CORE_OP_TIMEOUT 1000
//******************************************************************************
//* P R O T E C T E D M E T H O D S
//******************************************************************************
/**
* @brief This method implements the actions taken when entering the
* INITIAL state. This basically, causes an immediate transition
* into the STOPPED state.
*
* @param[in] object This parameter specifies the base object for which
* the state transition is occurring. This is cast into a
* SCIF_SAS_REMOTE_DEVICE object in the method implementation.
*
* @return none
*/
static
void scif_sas_remote_device_initial_state_enter(
SCI_BASE_OBJECT_T *object
)
{
SCIF_SAS_REMOTE_DEVICE_T * fw_device = (SCIF_SAS_REMOTE_DEVICE_T *)object;
SET_STATE_HANDLER(
fw_device,
scif_sas_remote_device_state_handler_table,
SCI_BASE_REMOTE_DEVICE_STATE_INITIAL
);
// Initial state is a transitional state to the stopped state
sci_base_state_machine_change_state(
&fw_device->parent.state_machine,
SCI_BASE_REMOTE_DEVICE_STATE_STOPPED
);
}
/**
* @brief This method implements the actions taken when entering the
* STOPPED state. This method updates the domains count of started
* devices and will invoke the destruct method if this entrance into
* the STOPPED state was due to a scif_remote_device_destruct()
* call by the user.
*
* @param[in] object This parameter specifies the base object for which
* the state transition is occurring. This is cast into a
* SCIF_SAS_REMOTE_DEVICE object in the method implementation.
*
* @return none
*/
static
void scif_sas_remote_device_stopped_state_enter(
SCI_BASE_OBJECT_T *object
)
{
SCIF_SAS_REMOTE_DEVICE_T * fw_device = (SCIF_SAS_REMOTE_DEVICE_T *)object;
SET_STATE_HANDLER(
fw_device,
scif_sas_remote_device_state_handler_table,
SCI_BASE_REMOTE_DEVICE_STATE_STOPPED
);
// There should be no outstanding requests for this device in the
// stopped state.
ASSERT(fw_device->request_count == 0);
// If we are entering the stopped state as a result of a destruct
// request, then let's perform the actual destruct operation now.
if (fw_device->destruct_when_stopped == TRUE)
fw_device->operation_status
= fw_device->state_handlers->parent.destruct_handler(
&fw_device->parent
);
/// @todo What should we do if this call fails?
fw_device->domain->state_handlers->device_stop_complete_handler(
&fw_device->domain->parent, &fw_device->parent
);
}
/**
* @brief This method implements the actions taken when entering the
* STARTING state. This method will attempt to start the core
* remote device and will kick-start the starting sub-state machine
* if no errors are encountered.
*
* @param[in] object This parameter specifies the base object for which
* the state transition is occurring. This is cast into a
* SCIF_SAS_REMOTE_DEVICE object in the method implementation.
*
* @return none
*/
static
void scif_sas_remote_device_starting_state_enter(
SCI_BASE_OBJECT_T *object
)
{
SCIF_SAS_REMOTE_DEVICE_T * fw_device = (SCIF_SAS_REMOTE_DEVICE_T *)object;
SET_STATE_HANDLER(
fw_device,
scif_sas_remote_device_state_handler_table,
SCI_BASE_REMOTE_DEVICE_STATE_STARTING
);
SCIF_LOG_INFO((
sci_base_object_get_logger(fw_device),
SCIF_LOG_OBJECT_REMOTE_DEVICE | SCIF_LOG_OBJECT_REMOTE_DEVICE_CONFIG,
"RemoteDevice:0x%x starting/configuring\n",
fw_device
));
fw_device->destination_state =
SCIF_SAS_REMOTE_DEVICE_DESTINATION_STATE_READY;
sci_base_state_machine_start(&fw_device->starting_substate_machine);
fw_device->operation_status = scic_remote_device_start(
fw_device->core_object,
SCIF_SAS_REMOTE_DEVICE_CORE_OP_TIMEOUT
);
if (fw_device->operation_status != SCI_SUCCESS)
{
fw_device->state_handlers->parent.fail_handler(&fw_device->parent);
// Something is seriously wrong. Starting the core remote device
// shouldn't fail in anyway in this state.
scif_cb_controller_error(fw_device->domain->controller,
SCI_CONTROLLER_REMOTE_DEVICE_ERROR);
}
}
/**
* @brief This method implements the actions taken when exiting the
* STARTING state. Currently this method simply stops the
* sub-state machine.
*
* @param[in] object This parameter specifies the base object for which
* the state transition is occurring. This is cast into a
* SCIF_SAS_REMOTE_DEVICE object in the method implementation.
*
* @return none
*/
static
void scif_sas_remote_device_starting_state_exit(
SCI_BASE_OBJECT_T *object
)
{
SCIF_SAS_REMOTE_DEVICE_T * fw_device = (SCIF_SAS_REMOTE_DEVICE_T *)object;
fw_device->destination_state =
SCIF_SAS_REMOTE_DEVICE_DESTINATION_STATE_UNSPECIFIED;
// Transition immediately into the operational sub-state.
sci_base_state_machine_stop(&fw_device->starting_substate_machine);
}
/**
* @brief This method implements the actions taken when entering the
* READY state. Currently this method simply starts the
* sub-state machine.
*
* @param[in] object This parameter specifies the base object for which
* the state transition is occurring. This is cast into a
* SCIF_SAS_REMOTE_DEVICE object in the method implementation.
*
* @return none
*/
static
void scif_sas_remote_device_ready_state_enter(
SCI_BASE_OBJECT_T *object
)
{
SCIF_SAS_REMOTE_DEVICE_T * fw_device = (SCIF_SAS_REMOTE_DEVICE_T *)object;
// Transition immediately into the operational sub-state.
sci_base_state_machine_start(&fw_device->ready_substate_machine);
#if defined(DISABLE_WIDE_PORTED_TARGETS)
scif_sas_domain_remote_device_start_complete(fw_device->domain,fw_device);
#endif
}
/**
* @brief This method implements the actions taken when exiting the
* READY state. Currently this method simply stops the
* sub-state machine.
*
* @param[in] object This parameter specifies the base object for which
* the state transition is occurring. This is cast into a
* SCIF_SAS_REMOTE_DEVICE object in the method implementation.
*
* @return none
*/
static
void scif_sas_remote_device_ready_state_exit(
SCI_BASE_OBJECT_T *object
)
{
SCIF_SAS_REMOTE_DEVICE_T * fw_device = (SCIF_SAS_REMOTE_DEVICE_T *)object;
// Transition immediately into the operational sub-state.
sci_base_state_machine_stop(&fw_device->ready_substate_machine);
}
/**
* @brief This method implements the actions taken when entering the
* STOPPING state. This includes: stopping the core remote device
* and handling any errors that may occur.
*
* @param[in] object This parameter specifies the base object for which
* the state transition is occurring. This is cast into a
* SCIF_SAS_REMOTE_DEVICE object in the method implementation.
*
* @return none
*/
static
void scif_sas_remote_device_stopping_state_enter(
SCI_BASE_OBJECT_T *object
)
{
SCIF_SAS_REMOTE_DEVICE_T * fw_device = (SCIF_SAS_REMOTE_DEVICE_T *)object;
SET_STATE_HANDLER(
fw_device,
scif_sas_remote_device_state_handler_table,
SCI_BASE_REMOTE_DEVICE_STATE_STOPPING
);
fw_device->operation_status = scic_remote_device_stop(
fw_device->core_object,
SCIF_SAS_REMOTE_DEVICE_CORE_OP_TIMEOUT
);
// If there was a failure, then transition directly to the stopped state.
if (fw_device->operation_status != SCI_SUCCESS)
{
/**
* @todo We may want to consider adding handling to reset the
* structure data for the framework and core devices here
* in order to help aid recovery.
*/
fw_device->state_handlers->stop_complete_handler(
fw_device, fw_device->operation_status
);
}
}
/**
* @brief This method implements the actions taken when exiting the
* STOPPING state.
*
* @param[in] object This parameter specifies the base object for which
* the state transition is occurring. This is cast into a
* SCIF_SAS_REMOTE_DEVICE object in the method implementation.
*
* @return none
*/
static
void scif_sas_remote_device_stopping_state_exit(
SCI_BASE_OBJECT_T *object
)
{
SCIF_SAS_REMOTE_DEVICE_T * fw_device = (SCIF_SAS_REMOTE_DEVICE_T *)object;
// Let the domain know that the device has stopped
fw_device->domain->device_start_count--;
}
/**
* @brief This method implements the actions taken when entering the
* FAILED state. This includes setting the state handler methods
* and issuing a scif_cb_remote_device_failed() notification to
* the user.
*
* @param[in] object This parameter specifies the base object for which
* the state transition is occurring. This is cast into a
* SCIF_SAS_REMOTE_DEVICE object in the method implementation.
*
* @return none
*/
static
void scif_sas_remote_device_failed_state_enter(
SCI_BASE_OBJECT_T *object
)
{
SCIF_SAS_REMOTE_DEVICE_T * fw_device = (SCIF_SAS_REMOTE_DEVICE_T *)object;
SET_STATE_HANDLER(
fw_device,
scif_sas_remote_device_state_handler_table,
SCI_BASE_REMOTE_DEVICE_STATE_FAILED
);
SCIF_LOG_INFO((
sci_base_object_get_logger(fw_device),
SCIF_LOG_OBJECT_REMOTE_DEVICE | SCIF_LOG_OBJECT_REMOTE_DEVICE_CONFIG,
"Domain:0x%x Device:0x%x Status:0x%x device failed\n",
fw_device->domain, fw_device, fw_device->operation_status
));
// Notify the user that the device has failed.
scif_cb_remote_device_failed(
fw_device->domain->controller,
fw_device->domain,
fw_device,
fw_device->operation_status
);
// Only call start_complete for the remote device if the device failed
// from the STARTING state.
if (fw_device->parent.state_machine.previous_state_id
== SCI_BASE_REMOTE_DEVICE_STATE_STARTING)
scif_sas_domain_remote_device_start_complete(fw_device->domain,fw_device);
}
/**
* @brief This method implements the actions taken when entering the RESETTING
* state.
*
* @param[in] object This parameter specifies the base object for which
* the state transition is occurring. This is cast into a
* SCIF_SAS_REMOTE_DEVICE object in the method implementation.
*
* @return none
*/
static
void scif_sas_remote_device_resetting_state_enter(
SCI_BASE_OBJECT_T *object
)
{
}
#if !defined(DISABLE_WIDE_PORTED_TARGETS)
/**
* @brief This method implements the actions taken when entering the UPDATING
* PORT WIDTH state.
*
* @param[in] object This parameter specifies the base object for which
* the state transition is occurring. This is cast into a
* SCIF_SAS_REMOTE_DEVICE object in the method implementation.
*
* @return none
*/
static
void scif_sas_remote_device_updating_port_width_state_enter(
SCI_BASE_OBJECT_T *object
)
{
SCIF_SAS_REMOTE_DEVICE_T * fw_device = (SCIF_SAS_REMOTE_DEVICE_T *)object;
SET_STATE_HANDLER(
fw_device,
scif_sas_remote_device_state_handler_table,
SCI_BASE_REMOTE_DEVICE_STATE_UPDATING_PORT_WIDTH
);
fw_device->destination_state = SCIF_SAS_REMOTE_DEVICE_DESTINATION_STATE_READY;
//If the request count is zero, go ahead to update the RNC.
//If not, don't do anything for now. The IO complete handler of this state
//will update the RNC whenever the request count goes down to zero.
if (fw_device->request_count == 0)
{
//stop the device, upon the stop complete callback, start the device again
//with the updated port width.
scic_remote_device_stop(
fw_device->core_object, SCIF_SAS_REMOTE_DEVICE_CORE_OP_TIMEOUT);
}
}
/**
* @brief This method implements the actions taken when exiting the
* STOPPING state.
*
* @param[in] object This parameter specifies the base object for which
* the state transition is occurring. This is cast into a
* SCIF_SAS_REMOTE_DEVICE object in the method implementation.
*
* @return none
*/
static
void scif_sas_remote_device_updating_port_width_state_exit(
SCI_BASE_OBJECT_T *object
)
{
SCIF_SAS_REMOTE_DEVICE_T * fw_device = (SCIF_SAS_REMOTE_DEVICE_T *)object;
fw_device->destination_state =
SCIF_SAS_REMOTE_DEVICE_DESTINATION_STATE_UNSPECIFIED;
}
#endif //#if !defined(DISABLE_WIDE_PORTED_TARGETS)
/**
* @brief This method implements the actions taken when entering the
* FINAL state. This includes setting the FINAL state handler
* methods.
*
* @param[in] object This parameter specifies the base object for which
* the state transition is occurring. This is cast into a
* SCIF_SAS_REMOTE_DEVICE object in the method implementation.
*
* @return none
*/
static
void scif_sas_remote_device_final_state_enter(
SCI_BASE_OBJECT_T *object
)
{
SCIF_SAS_REMOTE_DEVICE_T * fw_device = (SCIF_SAS_REMOTE_DEVICE_T *)object;
SET_STATE_HANDLER(
fw_device,
scif_sas_remote_device_state_handler_table,
SCI_BASE_REMOTE_DEVICE_STATE_FINAL
);
}
SCI_BASE_STATE_T
scif_sas_remote_device_state_table[SCI_BASE_REMOTE_DEVICE_MAX_STATES] =
{
{
SCI_BASE_REMOTE_DEVICE_STATE_INITIAL,
scif_sas_remote_device_initial_state_enter,
NULL
},
{
SCI_BASE_REMOTE_DEVICE_STATE_STOPPED,
scif_sas_remote_device_stopped_state_enter,
NULL
},
{
SCI_BASE_REMOTE_DEVICE_STATE_STARTING,
scif_sas_remote_device_starting_state_enter,
scif_sas_remote_device_starting_state_exit
},
{
SCI_BASE_REMOTE_DEVICE_STATE_READY,
scif_sas_remote_device_ready_state_enter,
scif_sas_remote_device_ready_state_exit
},
{
SCI_BASE_REMOTE_DEVICE_STATE_STOPPING,
scif_sas_remote_device_stopping_state_enter,
scif_sas_remote_device_stopping_state_exit
},
{
SCI_BASE_REMOTE_DEVICE_STATE_FAILED,
scif_sas_remote_device_failed_state_enter,
NULL
},
{
SCI_BASE_REMOTE_DEVICE_STATE_RESETTING,
scif_sas_remote_device_resetting_state_enter,
NULL
},
#if !defined(DISABLE_WIDE_PORTED_TARGETS)
{
SCI_BASE_REMOTE_DEVICE_STATE_UPDATING_PORT_WIDTH,
scif_sas_remote_device_updating_port_width_state_enter,
scif_sas_remote_device_updating_port_width_state_exit
},
#endif //#if !defined(DISABLE_WIDE_PORTED_TARGETS)
{
SCI_BASE_REMOTE_DEVICE_STATE_FINAL,
scif_sas_remote_device_final_state_enter,
NULL
},
};