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| Current File : //sys/dev/isci/scil/scic_sds_ssp_request.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/scic_sds_ssp_request.c 231689 2012-02-14 15:58:49Z jimharris $");
/**
* @file
*
* @brief This file contains the task management substate handlers for the
* SCIC_SDS_IO_REQUEST object.
* This file contains the enter/exit methods associated with each of
* the task management raw request states. For more information on the
* task management request state machine please refer to
* scic_sds_io_request.h
*/
#include <dev/isci/scil/intel_sas.h>
#include <dev/isci/scil/scic_sds_request.h>
#include <dev/isci/scil/scic_controller.h>
#include <dev/isci/scil/scic_sds_logger.h>
#include <dev/isci/scil/scic_sds_controller.h>
#include <dev/isci/scil/scu_completion_codes.h>
#include <dev/isci/scil/scu_task_context.h>
#include <dev/isci/scil/sci_base_state_machine.h>
/**
* @brief This method processes the completions transport layer (TL) status
* to determine if the RAW task management frame was sent successfully.
* If the raw frame was sent successfully, then the state for the
* task request transitions to waiting for a response frame.
*
* @param[in] this_request This parameter specifies the request for which
* the TC completion was received.
* @param[in] completion_code This parameter indicates the completion status
* information for the TC.
*
* @return Indicate if the tc completion handler was successful.
* @retval SCI_SUCCESS currently this method always returns success.
*/
static
SCI_STATUS scic_sds_ssp_task_request_await_tc_completion_tc_completion_handler(
SCIC_SDS_REQUEST_T * this_request,
U32 completion_code
)
{
SCIC_LOG_TRACE((
sci_base_object_get_logger(this_request),
SCIC_LOG_OBJECT_TASK_MANAGEMENT,
"scic_sds_ssp_task_request_await_tc_completion_tc_completion_handler(0x%x, 0x%x) enter\n",
this_request, completion_code
));
switch (SCU_GET_COMPLETION_TL_STATUS(completion_code))
{
case SCU_MAKE_COMPLETION_STATUS(SCU_TASK_DONE_GOOD):
scic_sds_request_set_status(
this_request, SCU_TASK_DONE_GOOD, SCI_SUCCESS
);
sci_base_state_machine_change_state(
&this_request->started_substate_machine,
SCIC_SDS_IO_REQUEST_STARTED_TASK_MGMT_SUBSTATE_AWAIT_TC_RESPONSE
);
break;
case SCU_MAKE_COMPLETION_STATUS(SCU_TASK_DONE_ACK_NAK_TO):
// Currently, the decision is to simply allow the task request to
// timeout if the task IU wasn't received successfully.
// There is a potential for receiving multiple task responses if we
// decide to send the task IU again.
SCIC_LOG_WARNING((
sci_base_object_get_logger(this_request),
SCIC_LOG_OBJECT_TASK_MANAGEMENT,
"TaskRequest:0x%x CompletionCode:%x - ACK/NAK timeout\n",
this_request, completion_code
));
sci_base_state_machine_change_state(
&this_request->started_substate_machine,
SCIC_SDS_IO_REQUEST_STARTED_TASK_MGMT_SUBSTATE_AWAIT_TC_RESPONSE
);
break;
default:
// All other completion status cause the IO to be complete. If a NAK
// was received, then it is up to the user to retry the request.
scic_sds_request_set_status(
this_request,
SCU_NORMALIZE_COMPLETION_STATUS(completion_code),
SCI_FAILURE_CONTROLLER_SPECIFIC_IO_ERR
);
sci_base_state_machine_change_state(
&this_request->parent.state_machine,
SCI_BASE_REQUEST_STATE_COMPLETED
);
break;
}
return SCI_SUCCESS;
}
/**
* @brief This method is responsible for processing a terminate/abort
* request for this TC while the request is waiting for the task
* management response unsolicited frame.
*
* @param[in] this_request This parameter specifies the request for which
* the termination was requested.
*
* @return This method returns an indication as to whether the abort
* request was successfully handled.
*
* @todo need to update to ensure the received UF doesn't cause damage
* to subsequent requests (i.e. put the extended tag in a holding
* pattern for this particular device).
*/
static
SCI_STATUS scic_sds_ssp_task_request_await_tc_response_abort_handler(
SCI_BASE_REQUEST_T * request
)
{
SCIC_SDS_REQUEST_T *this_request = (SCIC_SDS_REQUEST_T *)request;
SCIC_LOG_TRACE((
sci_base_object_get_logger(this_request),
SCIC_LOG_OBJECT_TASK_MANAGEMENT,
"scic_sds_ssp_task_request_await_tc_response_abort_handler(0x%x) enter\n",
this_request
));
sci_base_state_machine_change_state(
&this_request->parent.state_machine,
SCI_BASE_REQUEST_STATE_ABORTING
);
sci_base_state_machine_change_state(
&this_request->parent.state_machine,
SCI_BASE_REQUEST_STATE_COMPLETED
);
return SCI_SUCCESS;
}
/**
* @brief This method processes an unsolicited frame while the task mgmt
* request is waiting for a response frame. It will copy the
* response data, release the unsolicited frame, and transition
* the request to the SCI_BASE_REQUEST_STATE_COMPLETED state.
*
* @param[in] this_request This parameter specifies the request for which
* the unsolicited frame was received.
* @param[in] frame_index This parameter indicates the unsolicited frame
* index that should contain the response.
*
* @return This method returns an indication of whether the TC response
* frame was handled successfully or not.
* @retval SCI_SUCCESS Currently this value is always returned and indicates
* successful processing of the TC response.
*
* @todo Should probably update to check frame type and make sure it is
* a response frame.
*/
static
SCI_STATUS scic_sds_ssp_task_request_await_tc_response_frame_handler(
SCIC_SDS_REQUEST_T * this_request,
U32 frame_index
)
{
// Save off the controller, so that we do not touch the request after it
// is completed.
SCIC_SDS_CONTROLLER_T * owning_controller = this_request->owning_controller;
SCIC_LOG_TRACE((
sci_base_object_get_logger(this_request),
SCIC_LOG_OBJECT_TASK_MANAGEMENT,
"scic_sds_ssp_task_request_await_tc_response_frame_handler(0x%x, 0x%x) enter\n",
this_request, frame_index
));
scic_sds_io_request_copy_response(this_request);
sci_base_state_machine_change_state(
&this_request->parent.state_machine,
SCI_BASE_REQUEST_STATE_COMPLETED
);
scic_sds_controller_release_frame(
owning_controller, frame_index
);
return SCI_SUCCESS;
}
SCIC_SDS_IO_REQUEST_STATE_HANDLER_T
scic_sds_ssp_task_request_started_substate_handler_table
[SCIC_SDS_IO_REQUEST_STARTED_TASK_MGMT_MAX_SUBSTATES] =
{
// SCIC_SDS_IO_REQUEST_STARTED_TASK_MGMT_SUBSTATE_AWAIT_TC_COMPLETION
{
{
scic_sds_request_default_start_handler,
scic_sds_request_started_state_abort_handler,
scic_sds_request_default_complete_handler,
scic_sds_request_default_destruct_handler
},
scic_sds_ssp_task_request_await_tc_completion_tc_completion_handler,
scic_sds_request_default_event_handler,
scic_sds_request_default_frame_handler
},
// SCIC_SDS_IO_REQUEST_STARTED_TASK_MGMT_SUBSTATE_AWAIT_TC_RESPONSE
{
{
scic_sds_request_default_start_handler,
scic_sds_ssp_task_request_await_tc_response_abort_handler,
scic_sds_request_default_complete_handler,
scic_sds_request_default_destruct_handler
},
scic_sds_request_default_tc_completion_handler,
scic_sds_request_default_event_handler,
scic_sds_ssp_task_request_await_tc_response_frame_handler
}
};
/**
* @brief This method performs the actions required when entering the
* SCIC_SDS_IO_REQUEST_STARTED_TASK_MGMT_SUBSTATE_AWAIT_TC_COMPLETION
* sub-state. This includes setting the IO request state handlers
* for this sub-state.
*
* @param[in] object This parameter specifies the request object for which
* the sub-state change is occuring.
*
* @return none.
*/
static
void scic_sds_io_request_started_task_mgmt_await_tc_completion_substate_enter(
SCI_BASE_OBJECT_T *object
)
{
SCIC_SDS_REQUEST_T *this_request = (SCIC_SDS_REQUEST_T *)object;
SET_STATE_HANDLER(
this_request,
scic_sds_ssp_task_request_started_substate_handler_table,
SCIC_SDS_IO_REQUEST_STARTED_TASK_MGMT_SUBSTATE_AWAIT_TC_COMPLETION
);
}
/**
* @brief This method performs the actions required when entering the
* SCIC_SDS_IO_REQUEST_STARTED_SUBSTATE_AWAIT_TC_RESPONSE sub-state.
* This includes setting the IO request state handlers for this
* sub-state.
*
* @param[in] object This parameter specifies the request object for which
* the sub-state change is occuring.
*
* @return none.
*/
static
void scic_sds_io_request_started_task_mgmt_await_task_response_substate_enter(
SCI_BASE_OBJECT_T *object
)
{
SCIC_SDS_REQUEST_T *this_request = (SCIC_SDS_REQUEST_T *)object;
SET_STATE_HANDLER(
this_request,
scic_sds_ssp_task_request_started_substate_handler_table,
SCIC_SDS_IO_REQUEST_STARTED_TASK_MGMT_SUBSTATE_AWAIT_TC_RESPONSE
);
}
SCI_BASE_STATE_T scic_sds_io_request_started_task_mgmt_substate_table
[SCIC_SDS_IO_REQUEST_STARTED_TASK_MGMT_MAX_SUBSTATES] =
{
{
SCIC_SDS_IO_REQUEST_STARTED_TASK_MGMT_SUBSTATE_AWAIT_TC_COMPLETION,
scic_sds_io_request_started_task_mgmt_await_tc_completion_substate_enter,
NULL
},
{
SCIC_SDS_IO_REQUEST_STARTED_TASK_MGMT_SUBSTATE_AWAIT_TC_RESPONSE,
scic_sds_io_request_started_task_mgmt_await_task_response_substate_enter,
NULL
}
};