341 lines
12 KiB
C
341 lines
12 KiB
C
/*-
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* This file is provided under a dual BSD/GPLv2 license. When using or
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* redistributing this file, you may do so under either license.
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*
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* GPL LICENSE SUMMARY
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*
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* Copyright(c) 2008 - 2011 Intel Corporation. All rights reserved.
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*
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* This program is free software; you can redistribute it and/or modify
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* it under the terms of version 2 of the GNU General Public License as
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* published by the Free Software Foundation.
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*
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* This program is distributed in the hope that it will be useful, but
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* WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
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* General Public License for more details.
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*
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* You should have received a copy of the GNU General Public License
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* along with this program; if not, write to the Free Software
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* Foundation, Inc., 51 Franklin St - Fifth Floor, Boston, MA 02110-1301 USA.
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* The full GNU General Public License is included in this distribution
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* in the file called LICENSE.GPL.
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*
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* BSD LICENSE
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*
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* Copyright(c) 2008 - 2011 Intel Corporation. All rights reserved.
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* All rights reserved.
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*
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* Redistribution and use in source and binary forms, with or without
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* modification, are permitted provided that the following conditions
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* are met:
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*
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* * Redistributions of source code must retain the above copyright
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* notice, this list of conditions and the following disclaimer.
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* * Redistributions in binary form must reproduce the above copyright
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* notice, this list of conditions and the following disclaimer in
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* the documentation and/or other materials provided with the
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* distribution.
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*
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* THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
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* "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
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* LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
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* A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
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* OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
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* SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
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* LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
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* DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
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* THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
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* (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
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* OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
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*/
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#include <sys/cdefs.h>
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__FBSDID("$FreeBSD$");
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/**
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* @file
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*
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* @brief This file contains the task management substate handlers for the
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* SCIC_SDS_IO_REQUEST object.
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* This file contains the enter/exit methods associated with each of
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* the task management raw request states. For more information on the
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* task management request state machine please refer to
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* scic_sds_io_request.h
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*/
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#include <dev/isci/scil/intel_sas.h>
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#include <dev/isci/scil/scic_sds_request.h>
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#include <dev/isci/scil/scic_controller.h>
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#include <dev/isci/scil/scic_sds_logger.h>
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#include <dev/isci/scil/scic_sds_controller.h>
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#include <dev/isci/scil/scu_completion_codes.h>
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#include <dev/isci/scil/scu_task_context.h>
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#include <dev/isci/scil/sci_base_state_machine.h>
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/**
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* @brief This method processes the completions transport layer (TL) status
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* to determine if the RAW task management frame was sent successfully.
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* If the raw frame was sent successfully, then the state for the
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* task request transitions to waiting for a response frame.
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*
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* @param[in] this_request This parameter specifies the request for which
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* the TC completion was received.
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* @param[in] completion_code This parameter indicates the completion status
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* information for the TC.
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*
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* @return Indicate if the tc completion handler was successful.
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* @retval SCI_SUCCESS currently this method always returns success.
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*/
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static
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SCI_STATUS scic_sds_ssp_task_request_await_tc_completion_tc_completion_handler(
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SCIC_SDS_REQUEST_T * this_request,
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U32 completion_code
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)
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{
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SCIC_LOG_TRACE((
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sci_base_object_get_logger(this_request),
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SCIC_LOG_OBJECT_TASK_MANAGEMENT,
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"scic_sds_ssp_task_request_await_tc_completion_tc_completion_handler(0x%x, 0x%x) enter\n",
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this_request, completion_code
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));
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switch (SCU_GET_COMPLETION_TL_STATUS(completion_code))
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{
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case SCU_MAKE_COMPLETION_STATUS(SCU_TASK_DONE_GOOD):
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scic_sds_request_set_status(
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this_request, SCU_TASK_DONE_GOOD, SCI_SUCCESS
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);
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sci_base_state_machine_change_state(
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&this_request->started_substate_machine,
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SCIC_SDS_IO_REQUEST_STARTED_TASK_MGMT_SUBSTATE_AWAIT_TC_RESPONSE
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);
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break;
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case SCU_MAKE_COMPLETION_STATUS(SCU_TASK_DONE_ACK_NAK_TO):
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// Currently, the decision is to simply allow the task request to
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// timeout if the task IU wasn't received successfully.
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// There is a potential for receiving multiple task responses if we
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// decide to send the task IU again.
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SCIC_LOG_WARNING((
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sci_base_object_get_logger(this_request),
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SCIC_LOG_OBJECT_TASK_MANAGEMENT,
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"TaskRequest:0x%x CompletionCode:%x - ACK/NAK timeout\n",
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this_request, completion_code
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));
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sci_base_state_machine_change_state(
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&this_request->started_substate_machine,
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SCIC_SDS_IO_REQUEST_STARTED_TASK_MGMT_SUBSTATE_AWAIT_TC_RESPONSE
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);
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break;
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default:
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// All other completion status cause the IO to be complete. If a NAK
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// was received, then it is up to the user to retry the request.
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scic_sds_request_set_status(
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this_request,
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SCU_NORMALIZE_COMPLETION_STATUS(completion_code),
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SCI_FAILURE_CONTROLLER_SPECIFIC_IO_ERR
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);
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sci_base_state_machine_change_state(
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&this_request->parent.state_machine,
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SCI_BASE_REQUEST_STATE_COMPLETED
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);
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break;
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}
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return SCI_SUCCESS;
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}
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/**
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* @brief This method is responsible for processing a terminate/abort
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* request for this TC while the request is waiting for the task
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* management response unsolicited frame.
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*
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* @param[in] this_request This parameter specifies the request for which
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* the termination was requested.
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*
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* @return This method returns an indication as to whether the abort
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* request was successfully handled.
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*
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* @todo need to update to ensure the received UF doesn't cause damage
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* to subsequent requests (i.e. put the extended tag in a holding
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* pattern for this particular device).
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*/
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static
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SCI_STATUS scic_sds_ssp_task_request_await_tc_response_abort_handler(
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SCI_BASE_REQUEST_T * request
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)
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{
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SCIC_SDS_REQUEST_T *this_request = (SCIC_SDS_REQUEST_T *)request;
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SCIC_LOG_TRACE((
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sci_base_object_get_logger(this_request),
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SCIC_LOG_OBJECT_TASK_MANAGEMENT,
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"scic_sds_ssp_task_request_await_tc_response_abort_handler(0x%x) enter\n",
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this_request
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));
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sci_base_state_machine_change_state(
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&this_request->parent.state_machine,
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SCI_BASE_REQUEST_STATE_ABORTING
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);
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sci_base_state_machine_change_state(
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&this_request->parent.state_machine,
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SCI_BASE_REQUEST_STATE_COMPLETED
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);
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return SCI_SUCCESS;
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}
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/**
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* @brief This method processes an unsolicited frame while the task mgmt
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* request is waiting for a response frame. It will copy the
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* response data, release the unsolicited frame, and transition
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* the request to the SCI_BASE_REQUEST_STATE_COMPLETED state.
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*
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* @param[in] this_request This parameter specifies the request for which
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* the unsolicited frame was received.
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* @param[in] frame_index This parameter indicates the unsolicited frame
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* index that should contain the response.
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*
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* @return This method returns an indication of whether the TC response
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* frame was handled successfully or not.
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* @retval SCI_SUCCESS Currently this value is always returned and indicates
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* successful processing of the TC response.
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*
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* @todo Should probably update to check frame type and make sure it is
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* a response frame.
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*/
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static
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SCI_STATUS scic_sds_ssp_task_request_await_tc_response_frame_handler(
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SCIC_SDS_REQUEST_T * this_request,
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U32 frame_index
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)
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{
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// Save off the controller, so that we do not touch the request after it
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// is completed.
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SCIC_SDS_CONTROLLER_T * owning_controller = this_request->owning_controller;
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SCIC_LOG_TRACE((
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sci_base_object_get_logger(this_request),
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SCIC_LOG_OBJECT_TASK_MANAGEMENT,
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"scic_sds_ssp_task_request_await_tc_response_frame_handler(0x%x, 0x%x) enter\n",
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this_request, frame_index
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));
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scic_sds_io_request_copy_response(this_request);
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sci_base_state_machine_change_state(
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&this_request->parent.state_machine,
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SCI_BASE_REQUEST_STATE_COMPLETED
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);
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scic_sds_controller_release_frame(
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owning_controller, frame_index
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);
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return SCI_SUCCESS;
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}
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SCIC_SDS_IO_REQUEST_STATE_HANDLER_T
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scic_sds_ssp_task_request_started_substate_handler_table
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[SCIC_SDS_IO_REQUEST_STARTED_TASK_MGMT_MAX_SUBSTATES] =
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{
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// SCIC_SDS_IO_REQUEST_STARTED_TASK_MGMT_SUBSTATE_AWAIT_TC_COMPLETION
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{
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{
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scic_sds_request_default_start_handler,
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scic_sds_request_started_state_abort_handler,
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scic_sds_request_default_complete_handler,
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scic_sds_request_default_destruct_handler
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},
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scic_sds_ssp_task_request_await_tc_completion_tc_completion_handler,
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scic_sds_request_default_event_handler,
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scic_sds_request_default_frame_handler
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},
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// SCIC_SDS_IO_REQUEST_STARTED_TASK_MGMT_SUBSTATE_AWAIT_TC_RESPONSE
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{
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{
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scic_sds_request_default_start_handler,
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scic_sds_ssp_task_request_await_tc_response_abort_handler,
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scic_sds_request_default_complete_handler,
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scic_sds_request_default_destruct_handler
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},
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scic_sds_request_default_tc_completion_handler,
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scic_sds_request_default_event_handler,
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scic_sds_ssp_task_request_await_tc_response_frame_handler
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}
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};
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/**
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* @brief This method performs the actions required when entering the
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* SCIC_SDS_IO_REQUEST_STARTED_TASK_MGMT_SUBSTATE_AWAIT_TC_COMPLETION
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* sub-state. This includes setting the IO request state handlers
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* for this sub-state.
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*
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* @param[in] object This parameter specifies the request object for which
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* the sub-state change is occurring.
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*
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* @return none.
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*/
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static
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void scic_sds_io_request_started_task_mgmt_await_tc_completion_substate_enter(
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SCI_BASE_OBJECT_T *object
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)
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{
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SCIC_SDS_REQUEST_T *this_request = (SCIC_SDS_REQUEST_T *)object;
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SET_STATE_HANDLER(
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this_request,
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scic_sds_ssp_task_request_started_substate_handler_table,
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SCIC_SDS_IO_REQUEST_STARTED_TASK_MGMT_SUBSTATE_AWAIT_TC_COMPLETION
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);
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}
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/**
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* @brief This method performs the actions required when entering the
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* SCIC_SDS_IO_REQUEST_STARTED_SUBSTATE_AWAIT_TC_RESPONSE sub-state.
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* This includes setting the IO request state handlers for this
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* sub-state.
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*
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* @param[in] object This parameter specifies the request object for which
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* the sub-state change is occurring.
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*
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* @return none.
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*/
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static
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void scic_sds_io_request_started_task_mgmt_await_task_response_substate_enter(
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SCI_BASE_OBJECT_T *object
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)
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{
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SCIC_SDS_REQUEST_T *this_request = (SCIC_SDS_REQUEST_T *)object;
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SET_STATE_HANDLER(
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this_request,
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scic_sds_ssp_task_request_started_substate_handler_table,
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SCIC_SDS_IO_REQUEST_STARTED_TASK_MGMT_SUBSTATE_AWAIT_TC_RESPONSE
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);
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}
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SCI_BASE_STATE_T scic_sds_io_request_started_task_mgmt_substate_table
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[SCIC_SDS_IO_REQUEST_STARTED_TASK_MGMT_MAX_SUBSTATES] =
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{
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{
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SCIC_SDS_IO_REQUEST_STARTED_TASK_MGMT_SUBSTATE_AWAIT_TC_COMPLETION,
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scic_sds_io_request_started_task_mgmt_await_tc_completion_substate_enter,
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NULL
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},
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{
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SCIC_SDS_IO_REQUEST_STARTED_TASK_MGMT_SUBSTATE_AWAIT_TC_RESPONSE,
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scic_sds_io_request_started_task_mgmt_await_task_response_substate_enter,
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NULL
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}
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};
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