297 lines
10 KiB
C
297 lines
10 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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#ifndef _SCIC_SDS_REMOTE_NODE_CONTEXT_H_
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#define _SCIC_SDS_REMOTE_NODE_CONTEXT_H_
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/**
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* This file contains the structures, constants, and prototypes associated with
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* the remote node context in the silicon. It exists to model and manage
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* the remote node context in the silicon.
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*
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*
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*/
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#include "sci_base_state.h"
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#include "sci_base_state_machine.h"
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/**
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*
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*
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* This constant represents an invalid remote device id, it is used to program
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* the STPDARNI register so the driver knows when it has received a SIGNATURE
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* FIS from the SCU.
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*/
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#define SCIC_SDS_REMOTE_NODE_CONTEXT_INVALID_INDEX 0x0FFF
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#define SCU_HARDWARE_SUSPENSION (0)
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#define SCI_SOFTWARE_SUSPENSION (1)
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struct scic_sds_request;
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struct scic_sds_remote_device;
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struct scic_sds_remote_node_context;
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typedef void (*scics_sds_remote_node_context_callback)(void *);
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typedef enum sci_status (*scic_sds_remote_node_context_operation)(
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struct scic_sds_remote_node_context *sci_rnc,
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scics_sds_remote_node_context_callback callback,
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void *callback_parameter
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);
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typedef enum sci_status (*scic_sds_remote_node_context_suspend_operation)(
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struct scic_sds_remote_node_context *sci_rnc,
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u32 suspension_type,
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scics_sds_remote_node_context_callback callback,
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void *callback_parameter
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);
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typedef enum sci_status (*scic_sds_remote_node_context_io_request)(
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struct scic_sds_remote_node_context *sci_rnc,
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struct scic_sds_request *sci_req
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);
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typedef enum sci_status (*scic_sds_remote_node_context_event_handler)(
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struct scic_sds_remote_node_context *sci_rnc,
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u32 event_code
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);
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struct scic_sds_remote_node_context_handlers {
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/**
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* This handle is invoked to stop the RNC. The callback is invoked when after
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* the hardware notification that the RNC has been invalidated.
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*/
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scic_sds_remote_node_context_operation destruct_handler;
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/**
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* This handler is invoked when there is a request to suspend the RNC. The
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* callback is invoked after the hardware notification that the remote node is
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* suspended.
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*/
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scic_sds_remote_node_context_suspend_operation suspend_handler;
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/**
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* This handler is invoked when there is a request to resume the RNC. The
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* callback is invoked when after the RNC has reached the ready state.
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*/
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scic_sds_remote_node_context_operation resume_handler;
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/**
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* This handler is invoked when there is a request to start an io request
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* operation.
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*/
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scic_sds_remote_node_context_io_request start_io_handler;
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/**
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* This handler is invoked when there is a request to start a task request
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* operation.
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*/
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scic_sds_remote_node_context_io_request start_task_handler;
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/**
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* This handler is invoked where there is an RNC event that must be processed.
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*/
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scic_sds_remote_node_context_event_handler event_handler;
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};
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/**
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* This is the enumeration of the remote node context states.
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*/
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enum scis_sds_remote_node_context_states {
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/**
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* This state is the initial state for a remote node context. On a resume
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* request the remote node context will transition to the posting state.
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*/
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SCIC_SDS_REMOTE_NODE_CONTEXT_INITIAL_STATE,
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/**
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* This is a transition state that posts the RNi to the hardware. Once the RNC
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* is posted the remote node context will be made ready.
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*/
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SCIC_SDS_REMOTE_NODE_CONTEXT_POSTING_STATE,
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/**
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* This is a transition state that will post an RNC invalidate to the
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* hardware. Once the invalidate is complete the remote node context will
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* transition to the posting state.
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*/
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SCIC_SDS_REMOTE_NODE_CONTEXT_INVALIDATING_STATE,
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/**
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* This is a transition state that will post an RNC resume to the hardare.
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* Once the event notification of resume complete is received the remote node
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* context will transition to the ready state.
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*/
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SCIC_SDS_REMOTE_NODE_CONTEXT_RESUMING_STATE,
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/**
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* This is the state that the remote node context must be in to accept io
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* request operations.
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*/
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SCIC_SDS_REMOTE_NODE_CONTEXT_READY_STATE,
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/**
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* This is the state that the remote node context transitions to when it gets
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* a TX suspend notification from the hardware.
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*/
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SCIC_SDS_REMOTE_NODE_CONTEXT_TX_SUSPENDED_STATE,
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/**
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* This is the state that the remote node context transitions to when it gets
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* a TX RX suspend notification from the hardware.
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*/
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SCIC_SDS_REMOTE_NODE_CONTEXT_TX_RX_SUSPENDED_STATE,
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/**
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* This state is a wait state for the remote node context that waits for a
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* suspend notification from the hardware. This state is entered when either
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* there is a request to supend the remote node context or when there is a TC
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* completion where the remote node will be suspended by the hardware.
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*/
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SCIC_SDS_REMOTE_NODE_CONTEXT_AWAIT_SUSPENSION_STATE,
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SCIC_SDS_REMOTE_NODE_CONTEXT_MAX_STATES
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};
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/**
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*
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*
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* This enumeration is used to define the end destination state for the remote
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* node context.
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*/
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enum scic_sds_remote_node_context_destination_state {
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SCIC_SDS_REMOTE_NODE_DESTINATION_STATE_UNSPECIFIED,
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SCIC_SDS_REMOTE_NODE_DESTINATION_STATE_READY,
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SCIC_SDS_REMOTE_NODE_DESTINATION_STATE_FINAL
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};
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/**
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* struct scic_sds_remote_node_context - This structure contains the data
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* associated with the remote node context object. The remote node context
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* (RNC) object models the the remote device information necessary to manage
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* the silicon RNC.
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*/
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struct scic_sds_remote_node_context {
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/**
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* This field indicates the remote node index (RNI) associated with
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* this RNC.
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*/
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u16 remote_node_index;
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/**
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* This field is the recored suspension code or the reason for the remote node
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* context suspension.
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*/
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u32 suspension_code;
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/**
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* This field is true if the remote node context is resuming from its current
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* state. This can cause an automatic resume on receiving a suspension
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* notification.
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*/
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enum scic_sds_remote_node_context_destination_state destination_state;
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/**
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* This field contains the callback function that the user requested to be
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* called when the requested state transition is complete.
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*/
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scics_sds_remote_node_context_callback user_callback;
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/**
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* This field contains the parameter that is called when the user requested
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* state transition is completed.
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*/
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void *user_cookie;
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/**
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* This field contains the data for the object's state machine.
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*/
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struct sci_base_state_machine state_machine;
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struct scic_sds_remote_node_context_handlers *state_handlers;
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};
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void scic_sds_remote_node_context_construct(struct scic_sds_remote_node_context *rnc,
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u16 remote_node_index);
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bool scic_sds_remote_node_context_is_ready(
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struct scic_sds_remote_node_context *sci_rnc);
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#define scic_sds_remote_node_context_get_remote_node_index(rcn) \
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((rnc)->remote_node_index)
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#define scic_sds_remote_node_context_event_handler(rnc, event_code) \
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((rnc)->state_handlers->event_handler(rnc, event_code))
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#define scic_sds_remote_node_context_resume(rnc, callback, parameter) \
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((rnc)->state_handlers->resume_handler(rnc, callback, parameter))
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#define scic_sds_remote_node_context_suspend(rnc, suspend_type, callback, parameter) \
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((rnc)->state_handlers->suspend_handler(rnc, suspend_type, callback, parameter))
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#define scic_sds_remote_node_context_destruct(rnc, callback, parameter) \
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((rnc)->state_handlers->destruct_handler(rnc, callback, parameter))
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#define scic_sds_remote_node_context_start_io(rnc, request) \
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((rnc)->state_handlers->start_io_handler(rnc, request))
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#define scic_sds_remote_node_context_start_task(rnc, task) \
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((rnc)->state_handlers->start_task_handler(rnc, task))
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#endif /* _SCIC_SDS_REMOTE_NODE_CONTEXT_H_ */
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