xref: /freebsd-10-stable/sys/dev/isci/scil/sci_base_phy.h

/*-
 * 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.
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 *     notice, this list of conditions and the following disclaimer in
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 * 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
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 * $FreeBSD$
 */
#ifndef _SCI_BASE_PHY_H_
#define _SCI_BASE_PHY_H_

/**
 * @file
 *
 * @brief This file contains all of the structures, constants, and methods
 *        common to all phy object definitions.
 */

#ifdef __cplusplus
extern "C" {
#endif // __cplusplus

#include <dev/isci/scil/sci_base_logger.h>
#include <dev/isci/scil/sci_base_state_machine.h>
#include <dev/isci/scil/sci_base_state_machine_logger.h>

/**
 * @enum SCI_BASE_PHY_STATES
 *
 * @brief This enumeration depicts the standard states common to all phy
 *        state machine implementations.
 */
typedef enum _SCI_BASE_PHY_STATES
{
   /**
    * Simply the initial state for the base domain state machine.
    */
   SCI_BASE_PHY_STATE_INITIAL,

   /**
    * This state indicates that the phy has successfully been stopped.
    * In this state no new IO operations are permitted on this phy.
    * This state is entered from the INITIAL state.
    * This state is entered from the STARTING state.
    * This state is entered from the READY state.
    * This state is entered from the RESETTING state.
    */
   SCI_BASE_PHY_STATE_STOPPED,

   /**
    * This state indicates that the phy is in the process of becomming
    * ready.  In this state no new IO operations are permitted on this phy.
    * This state is entered from the STOPPED state.
    * This state is entered from the READY state.
    * This state is entered from the RESETTING state.
    */
   SCI_BASE_PHY_STATE_STARTING,

   /**
    * This state indicates the phy is now ready.  Thus, the user
    * is able to perform IO operations utilizing this phy as long as it
    * is currently part of a valid port.
    * This state is entered from the STARTING state.
    */
   SCI_BASE_PHY_STATE_READY,

   /**
    * This state indicates that the phy is in the process of being reset.
    * In this state no new IO operations are permitted on this phy.
    * This state is entered from the READY state.
    */
   SCI_BASE_PHY_STATE_RESETTING,

   /**
    * Simply the final state for the base phy state machine.
    */
   SCI_BASE_PHY_STATE_FINAL,

   SCI_BASE_PHY_MAX_STATES

} SCI_BASE_PHY_STATES;

/**
 * @struct SCI_BASE_PHY
 *
 * @brief This structure defines all of the fields common to PHY objects.
 */
typedef struct SCI_BASE_PHY
{
   /**
    * This field depicts the parent object (SCI_BASE_OBJECT) for the phy.
    */
   SCI_BASE_OBJECT_T parent;

   /**
    * This field contains the information for the base phy state machine.
    */
   SCI_BASE_STATE_MACHINE_T state_machine;

   #ifdef SCI_LOGGING
   SCI_BASE_STATE_MACHINE_LOGGER_T state_machine_logger;
   #endif // SCI_LOGGING

} SCI_BASE_PHY_T;

typedef SCI_STATUS (*SCI_BASE_PHY_HANDLER_T)(
   SCI_BASE_PHY_T *
);

/**
 * @struct SCI_BASE_PHY_STATE_HANDLER
 *
 * @brief This structure contains all of the state handler methods common to
 *        base phy state machines.  Handler methods provide the ability
 *        to change the behavior for user requests or transitions depending
 *        on the state the machine is in.
 */
typedef struct SCI_BASE_PHY_STATE_HANDLER
{
   /**
    * The start_handler specifies the method invoked when there is an
    * attempt to start a phy.
    */
   SCI_BASE_PHY_HANDLER_T start_handler;

   /**
    * The stop_handler specifies the method invoked when there is an
    * attempt to stop a phy.
    */
   SCI_BASE_PHY_HANDLER_T stop_handler;

   /**
    * The reset_handler specifies the method invoked when there is an
    * attempt to reset a phy.
    */
   SCI_BASE_PHY_HANDLER_T reset_handler;

   /**
    * The destruct_handler specifies the method invoked when attempting to
    * destruct a phy.
    */
   SCI_BASE_PHY_HANDLER_T destruct_handler;

} SCI_BASE_PHY_STATE_HANDLER_T;

/**
 * @brief Construct the base phy
 *
 * @param[in] this_phy This parameter specifies the base phy to be
 *            constructed.
 * @param[in] logger This parameter specifies the logger associated with
 *            this base phy object.
 * @param[in] state_table This parameter specifies the table of state
 *            definitions to be utilized for the phy state machine.
 *
 * @return none
 */
void sci_base_phy_construct(
   SCI_BASE_PHY_T    * this_phy,
   SCI_BASE_LOGGER_T * logger,
   SCI_BASE_STATE_T  * state_table
);

#ifdef __cplusplus
}
#endif // __cplusplus

#endif // _SCI_BASE_PHY_H_