/*

File:SCSIEmulatorIOKitDriver.cpp

Abstract: Implementation of an IOKit wrapper used to match and load

        instances of the SCSI HBA emulator

Version: 1.0

Disclaimer: IMPORTANT:  This Apple software is supplied to you by 

Apple Inc. ("Apple") in consideration of your agreement to the

following terms, and your use, installation, modification or

redistribution of this Apple software constitutes acceptance of these

terms.  If you do not agree with these terms, please do not use,

install, modify or redistribute this Apple software.

In consideration of your agreement to abide by the following terms, and

subject to these terms, Apple grants you a personal, non-exclusive

license, under Apple's copyrights in this original Apple software (the

"Apple Software"), to use, reproduce, modify and redistribute the Apple

Software, with or without modifications, in source and/or binary forms;

provided that if you redistribute the Apple Software in its entirety and

without modifications, you must retain this notice and the following

text and disclaimers in all such redistributions of the Apple Software. 

Neither the name, trademarks, service marks or logos of Apple Inc. 

may be used to endorse or promote products derived from the Apple

Software without specific prior written permission from Apple.  Except

as expressly stated in this notice, no other rights or licenses, express

or implied, are granted by Apple herein, including but not limited to

any patent rights that may be infringed by your derivative works or by

other works in which the Apple Software may be incorporated.

The Apple Software is provided by Apple on an "AS IS" basis.  APPLE

MAKES NO WARRANTIES, EXPRESS OR IMPLIED, INCLUDING WITHOUT LIMITATION

THE IMPLIED WARRANTIES OF NON-INFRINGEMENT, MERCHANTABILITY AND FITNESS

FOR A PARTICULAR PURPOSE, REGARDING THE APPLE SOFTWARE OR ITS USE AND

OPERATION ALONE OR IN COMBINATION WITH YOUR PRODUCTS.

IN NO EVENT SHALL APPLE BE LIABLE FOR ANY SPECIAL, INDIRECT, INCIDENTAL

OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF

SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS

INTERRUPTION) ARISING IN ANY WAY OUT OF THE USE, REPRODUCTION,

MODIFICATION AND/OR DISTRIBUTION OF THE APPLE SOFTWARE, HOWEVER CAUSED

AND WHETHER UNDER THEORY OF CONTRACT, TORT (INCLUDING NEGLIGENCE),

STRICT LIABILITY OR OTHERWISE, EVEN IF APPLE HAS BEEN ADVISED OF THE

POSSIBILITY OF SUCH DAMAGE.

Copyright (C) 2007 Apple Inc. All Rights Reserved.

*/

#include <IOKit/IOMessage.h>

#include <IOKit/IOLib.h>

#include <IOKit/pci/IOPCIDevice.h>

#include <IOKit/IOBufferMemoryDescriptor.h>

#include "SCSIEmulatorIOKitDriver.h"

#include "SCSIEmulator.h"

#include "SCSIEmulatorAdapterNub.h"

// Define superclass

#define super IOService

// REQUIRED! This macro defines the class's constructors, destructors,

// and several other methods I/O Kit requires. Do NOT use super as the

// second parameter. You must use the literal name of the superclass.

OSDefineMetaClassAndStructors(com_apple_dts_SCSIEmulatorIOKitDriver, IOService)

// Only present to provide a debug checkpoint

bool com_apple_dts_SCSIEmulatorIOKitDriver::init(OSDictionary *dict)

{

    bool res = super::init(dict);

    return res;

}

// Only present to provide a debug checkpoint

void com_apple_dts_SCSIEmulatorIOKitDriver::free(void)

{

    super::free();

}

// Only present to provide a debug checkpoint

IOService *com_apple_dts_SCSIEmulatorIOKitDriver::probe(IOService *provider, SInt32 *score)

{

    IOService *res = super::probe(provider, score);

    return res;

}

bool com_apple_dts_SCSIEmulatorIOKitDriver::start(IOService *provider)

{

    bool res = super::start(provider);

    if (res) {

        // OK... we could add a userClient to this to allow for configuration, but

        // this will suffice for now.  By default, this creates a single 20MB RAM disk

        mDisk = OSTypeAlloc(com_apple_dts_SCSIEmulator);

        if (mDisk) {

            if (mDisk->init()) {

                createNewAdapter(mDisk);

            } else {

                mDisk->release();

                mDisk = NULL;

            }

        }

    }

    return res;

}

// Only present to provide a debug checkpoint

void com_apple_dts_SCSIEmulatorIOKitDriver::stop(IOService *provider)

{       

    if (mDisk) {

        mDisk->release();

        mDisk = NULL;

    }

    super::stop(provider);

}

// Only present to provide a debug checkpoint

IOReturn

com_apple_dts_SCSIEmulatorIOKitDriver::message( UInt32 type, IOService *provider, void *argument )

{

    IOReturn ret;

    ret = super::message(type, provider, argument);

    return ret;

}

// Only present to provide a debug checkpoint

bool com_apple_dts_SCSIEmulatorIOKitDriver::willTerminate(IOService *provider, IOOptionBits options)

{

    return super::willTerminate(provider, options);

}

// Only present to provide a debug checkpoint

bool com_apple_dts_SCSIEmulatorIOKitDriver::didTerminate(IOService *provider, IOOptionBits options, bool *defer)

{

    return super::didTerminate(provider, options, defer);

}

com_apple_dts_SCSIEmulatorAdapterNub *

com_apple_dts_SCSIEmulatorIOKitDriver::createNewAdapter(com_apple_dts_SCSIEmulator *adapter)

{

    com_apple_dts_SCSIEmulatorAdapterNub *newService = OSTypeAlloc(com_apple_dts_SCSIEmulatorAdapterNub);

    bool startedOK = false;

    if (newService) {

        do {

            if (!newService->init(adapter)) {

                IOLog("createNewAdapter: Failed to init adapter nub\n");

                break;

            }

            if (!newService->attach(this)) {

                IOLog("createNewAdapter: Failed to attach adapter nub\n");

                break;

            }

            this->checkResources();

            newService->checkResources();

            if (!newService->start(this)) {

                IOLog("createNewAdapter: Failed start call to adapter nub\n");

                newService->detach(this);

            } else {

                startedOK = true;

            }

        } while (false);

        newService->release();

    }

    if (!startedOK) {

        newService = NULL;

    }

    return newService;

}