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Annotation of kernel/bsd/dev/ppc/drvPPCATA/AtapiCntInternal.h, revision 1.1

1.1     ! root        1: /*
        !             2:  * Copyright (c) 1999 Apple Computer, Inc. All rights reserved.
        !             3:  *
        !             4:  * @APPLE_LICENSE_HEADER_START@
        !             5:  * 
        !             6:  * Portions Copyright (c) 1999 Apple Computer, Inc.  All Rights
        !             7:  * Reserved.  This file contains Original Code and/or Modifications of
        !             8:  * Original Code as defined in and that are subject to the Apple Public
        !             9:  * Source License Version 1.1 (the "License").  You may not use this file
        !            10:  * except in compliance with the License.  Please obtain a copy of the
        !            11:  * License at http://www.apple.com/publicsource and read it before using
        !            12:  * this file.
        !            13:  * 
        !            14:  * The Original Code and all software distributed under the License are
        !            15:  * distributed on an "AS IS" basis, WITHOUT WARRANTY OF ANY KIND, EITHER
        !            16:  * EXPRESS OR IMPLIED, AND APPLE HEREBY DISCLAIMS ALL SUCH WARRANTIES,
        !            17:  * INCLUDING WITHOUT LIMITATION, ANY WARRANTIES OF MERCHANTABILITY,
        !            18:  * FITNESS FOR A PARTICULAR PURPOSE OR NON-INFRINGEMENT.  Please see the
        !            19:  * License for the specific language governing rights and limitations
        !            20:  * under the License.
        !            21:  * 
        !            22:  * @APPLE_LICENSE_HEADER_END@
        !            23:  */
        !            24: 
        !            25: // Copyright 1997 by Apple Computer, Inc., all rights reserved.
        !            26: /*
        !            27:  * Copyright (c) 1995-1997 NeXT Software, Inc.  All rights reserved. 
        !            28:  *
        !            29:  * AtapiCntInternal.h - Definition of ATAPI controller class.
        !            30:  *
        !            31:  *
        !            32:  * HISTORY 
        !            33:  * 21-Mar-1995         Rakesh Dubey at NeXT 
        !            34:  *     Created. 
        !            35:  */
        !            36:  
        !            37: #import "AtapiCnt.h"
        !            38: 
        !            39: /*
        !            40:  * Condition variable states for ioQueueLock.
        !            41:  */
        !            42: #define NO_WORK_AVAILABLE      0
        !            43: #define WORK_AVAILABLE         1
        !            44: 
        !            45: @interface AtapiController(Internal)
        !            46: 
        !            47: /*
        !            48:  * One-time only initialization.
        !            49:  */
        !            50: - initResources:controller;
        !            51: 
        !            52: /*
        !            53:  * Free up local resources. 
        !            54:  */
        !            55: - free;
        !            56: 
        !            57: 
        !            58: /*
        !            59:  * Alloc/free command buffers.
        !            60:  */
        !            61: - (atapiBuf_t *)allocAtapiBuf;
        !            62: - (void)freeAtapiBuf:(atapiBuf_t *)atapiBuf;
        !            63: 
        !            64: 
        !            65: /*
        !            66:  * -- Enqueue an atapiBuf_t on ioQueue<Disk,Nodisk>
        !            67:  * -- wake up the I/O thread
        !            68:  * -- wait for I/O complete (if atapiBuf->pending == NULL)
        !            69:  */
        !            70: - (IOReturn)enqueueAtapiBuf    : (atapiBuf_t *)atapiBuf;
        !            71: 
        !            72: /*
        !            73:  * Either wake up the thread which is waiting on the atapiCmdBuf, or send an 
        !            74:  * ioComplete back to client. atapiCmdBuf->status must be valid.
        !            75:  */
        !            76: - (void)atapiIoComplete                : (atapiBuf_t *)atapiBuf;
        !            77: 
        !            78: /*
        !            79:  * Main command dispatch method.
        !            80:  */
        !            81: - (void)atapiCmdDispatch               : (atapiBuf_t *)atapiBuf;
        !            82: 
        !            83: /*
        !            84:  * Unlock ioQLock, updating condition variable as appropriate.
        !            85:  */
        !            86: - (void)unlockIoQLock;
        !            87: 
        !            88: /*
        !            89:  * Top-level I/O thread.
        !            90:  */
        !            91: volatile void atapiThread(AtapiController *atapiCnt);
        !            92: 
        !            93: @end   /* AtapiController(Internal) */
        !            94: 

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