/*
* 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.
* * Neither the name of Intel Corporation nor the names of its
* contributors may be used to endorse or promote products derived
* from this software without specific prior written permission.
*
* 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
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* OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
*/
#ifndef _SCIC_SDS_REMOTE_NODE_CONTEXT_H_
#define _SCIC_SDS_REMOTE_NODE_CONTEXT_H_
/**
* This file contains the structures, constants, and prototypes associated with
* the remote node context in the silicon. It exists to model and manage
* the remote node context in the silicon.
*
*
*/
#include "isci.h"
/**
*
*
* This constant represents an invalid remote device id, it is used to program
* the STPDARNI register so the driver knows when it has received a SIGNATURE
* FIS from the SCU.
*/
#define SCIC_SDS_REMOTE_NODE_CONTEXT_INVALID_INDEX 0x0FFF
#define SCU_HARDWARE_SUSPENSION (0)
#define SCI_SOFTWARE_SUSPENSION (1)
struct isci_request;
struct isci_remote_device;
struct scic_sds_remote_node_context;
typedef void (*scics_sds_remote_node_context_callback)(void *);
/**
* This is the enumeration of the remote node context states.
*/
enum scis_sds_remote_node_context_states {
/**
* This state is the initial state for a remote node context. On a resume
* request the remote node context will transition to the posting state.
*/
SCI_RNC_INITIAL,
/**
* This is a transition state that posts the RNi to the hardware. Once the RNC
* is posted the remote node context will be made ready.
*/
SCI_RNC_POSTING,
/**
* This is a transition state that will post an RNC invalidate to the
* hardware. Once the invalidate is complete the remote node context will
* transition to the posting state.
*/
SCI_RNC_INVALIDATING,
/**
* This is a transition state that will post an RNC resume to the hardare.
* Once the event notification of resume complete is received the remote node
* context will transition to the ready state.
*/
SCI_RNC_RESUMING,
/**
* This is the state that the remote node context must be in to accept io
* request operations.
*/
SCI_RNC_READY,
/**
* This is the state that the remote node context transitions to when it gets
* a TX suspend notification from the hardware.
*/
SCI_RNC_TX_SUSPENDED,
/**
* This is the state that the remote node context transitions to when it gets
* a TX RX suspend notification from the hardware.
*/
SCI_RNC_TX_RX_SUSPENDED,
/**
* This state is a wait state for the remote node context that waits for a
* suspend notification from the hardware. This state is entered when either
* there is a request to supend the remote node context or when there is a TC
* completion where the remote node will be suspended by the hardware.
*/
SCI_RNC_AWAIT_SUSPENSION
};
/**
*
*
* This enumeration is used to define the end destination state for the remote
* node context.
*/
enum scic_sds_remote_node_context_destination_state {
SCIC_SDS_REMOTE_NODE_DESTINATION_STATE_UNSPECIFIED,
SCIC_SDS_REMOTE_NODE_DESTINATION_STATE_READY,
SCIC_SDS_REMOTE_NODE_DESTINATION_STATE_FINAL
};
/**
* struct scic_sds_remote_node_context - This structure contains the data
* associated with the remote node context object. The remote node context
* (RNC) object models the the remote device information necessary to manage
* the silicon RNC.
*/
struct scic_sds_remote_node_context {
/**
* This field indicates the remote node index (RNI) associated with
* this RNC.
*/
u16 remote_node_index;
/**
* This field is the recored suspension code or the reason for the remote node
* context suspension.
*/
u32 suspension_code;
/**
* This field is true if the remote node context is resuming from its current
* state. This can cause an automatic resume on receiving a suspension
* notification.
*/
enum scic_sds_remote_node_context_destination_state destination_state;
/**
* This field contains the callback function that the user requested to be
* called when the requested state transition is complete.
*/
scics_sds_remote_node_context_callback user_callback;
/**
* This field contains the parameter that is called when the user requested
* state transition is completed.
*/
void *user_cookie;
/**
* This field contains the data for the object's state machine.
*/
struct sci_base_state_machine sm;
};
void scic_sds_remote_node_context_construct(struct scic_sds_remote_node_context *rnc,
u16 remote_node_index);
bool scic_sds_remote_node_context_is_ready(
struct scic_sds_remote_node_context *sci_rnc);
#define scic_sds_remote_node_context_get_remote_node_index(rcn) \
((rnc)->remote_node_index)
enum sci_status scic_sds_remote_node_context_event_handler(struct scic_sds_remote_node_context *sci_rnc,
u32 event_code);
enum sci_status scic_sds_remote_node_context_destruct(struct scic_sds_remote_node_context *sci_rnc,
scics_sds_remote_node_context_callback callback,
void *callback_parameter);
enum sci_status scic_sds_remote_node_context_suspend(struct scic_sds_remote_node_context *sci_rnc,
u32 suspend_type,
scics_sds_remote_node_context_callback cb_fn,
void *cb_p);
enum sci_status scic_sds_remote_node_context_resume(struct scic_sds_remote_node_context *sci_rnc,
scics_sds_remote_node_context_callback cb_fn,
void *cb_p);
enum sci_status scic_sds_remote_node_context_start_task(struct scic_sds_remote_node_context *sci_rnc,
struct isci_request *ireq);
enum sci_status scic_sds_remote_node_context_start_io(struct scic_sds_remote_node_context *sci_rnc,
struct isci_request *ireq);
#endif /* _SCIC_SDS_REMOTE_NODE_CONTEXT_H_ */
