241 строка
9.2 KiB
C
241 строка
9.2 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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* * Neither the name of Intel Corporation nor the names of its
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* contributors may be used to endorse or promote products derived
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* from this software without specific prior written permission.
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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 "host.h"
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#include "request.h"
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#include "state_machine.h"
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#include "scu_task_context.h"
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#include "scu_completion_codes.h"
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/**
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* This method processes the completions transport layer (TL) status to
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* determine if the RAW task management frame was sent successfully. If the
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* raw frame was sent successfully, then the state for the task request
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* transitions to waiting for a response frame.
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* @sci_req: This parameter specifies the request for which the TC
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* completion was received.
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* @completion_code: This parameter indicates the completion status information
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* for the TC.
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*
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* Indicate if the tc completion handler was successful. SCI_SUCCESS currently
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* this method always returns success.
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*/
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static enum sci_status scic_sds_ssp_task_request_await_tc_completion_tc_completion_handler(
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struct scic_sds_request *sci_req,
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u32 completion_code)
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{
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switch (SCU_GET_COMPLETION_TL_STATUS(completion_code)) {
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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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sci_req, SCU_TASK_DONE_GOOD, SCI_SUCCESS
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);
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sci_base_state_machine_change_state(
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&sci_req->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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/*
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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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dev_warn(scic_to_dev(sci_req->owning_controller),
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"%s: TaskRequest:0x%p CompletionCode:%x - "
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"ACK/NAK timeout\n",
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__func__,
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sci_req,
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completion_code);
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sci_base_state_machine_change_state(
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&sci_req->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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/*
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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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sci_req,
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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(&sci_req->state_machine,
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SCI_BASE_REQUEST_STATE_COMPLETED);
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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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* This method is responsible for processing a terminate/abort request for this
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* TC while the request is waiting for the task management response
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* unsolicited frame.
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* @sci_req: This parameter specifies the request for which the
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* termination was requested.
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*
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* This method returns an indication as to whether the abort request was
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* successfully handled. need to update to ensure the received UF doesn't cause
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* damage 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 enum sci_status scic_sds_ssp_task_request_await_tc_response_abort_handler(
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struct scic_sds_request *request)
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{
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sci_base_state_machine_change_state(&request->state_machine,
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SCI_BASE_REQUEST_STATE_ABORTING);
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sci_base_state_machine_change_state(&request->state_machine,
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SCI_BASE_REQUEST_STATE_COMPLETED);
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return SCI_SUCCESS;
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}
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/**
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* This method processes an unsolicited frame while the task mgmt request is
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* waiting for a response frame. It will copy the response data, release
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* the unsolicited frame, and transition the request to the
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* SCI_BASE_REQUEST_STATE_COMPLETED state.
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* @sci_req: This parameter specifies the request for which the
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* unsolicited frame was received.
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* @frame_index: This parameter indicates the unsolicited frame index that
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* should contain the response.
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*
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* This method returns an indication of whether the TC response frame was
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* handled successfully or not. SCI_SUCCESS Currently this value is always
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* returned and indicates successful processing of the TC response. Should
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* probably update to check frame type and make sure it is a response frame.
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*/
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static enum sci_status scic_sds_ssp_task_request_await_tc_response_frame_handler(
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struct scic_sds_request *request,
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u32 frame_index)
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{
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scic_sds_io_request_copy_response(request);
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sci_base_state_machine_change_state(&request->state_machine,
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SCI_BASE_REQUEST_STATE_COMPLETED);
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scic_sds_controller_release_frame(request->owning_controller,
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frame_index);
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return SCI_SUCCESS;
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}
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static const struct scic_sds_io_request_state_handler 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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.abort_handler = scic_sds_request_started_state_abort_handler,
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.tc_completion_handler = scic_sds_ssp_task_request_await_tc_completion_tc_completion_handler,
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},
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[SCIC_SDS_IO_REQUEST_STARTED_TASK_MGMT_SUBSTATE_AWAIT_TC_RESPONSE] = {
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.abort_handler = scic_sds_ssp_task_request_await_tc_response_abort_handler,
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.frame_handler = 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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* 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 for this
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* sub-state.
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* @object: This parameter specifies the request object for which the sub-state
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* change is occurring.
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*
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* none.
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*/
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static void scic_sds_io_request_started_task_mgmt_await_tc_completion_substate_enter(
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void *object)
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{
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struct scic_sds_request *sci_req = object;
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SET_STATE_HANDLER(
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sci_req,
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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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* This method performs the actions required when entering the
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* SCIC_SDS_IO_REQUEST_STARTED_SUBSTATE_AWAIT_TC_RESPONSE sub-state. This
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* includes setting the IO request state handlers for this sub-state.
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* @object: This parameter specifies the request object for which the sub-state
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* change is occurring.
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*
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* none.
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*/
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static void scic_sds_io_request_started_task_mgmt_await_task_response_substate_enter(
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void *object)
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{
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struct scic_sds_request *sci_req = object;
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SET_STATE_HANDLER(
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sci_req,
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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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const struct sci_base_state scic_sds_io_request_started_task_mgmt_substate_table[] = {
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[SCIC_SDS_IO_REQUEST_STARTED_TASK_MGMT_SUBSTATE_AWAIT_TC_COMPLETION] = {
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.enter_state = scic_sds_io_request_started_task_mgmt_await_tc_completion_substate_enter,
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},
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[SCIC_SDS_IO_REQUEST_STARTED_TASK_MGMT_SUBSTATE_AWAIT_TC_RESPONSE] = {
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.enter_state = scic_sds_io_request_started_task_mgmt_await_task_response_substate_enter,
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},
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};
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