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Annotation of Examples/DriverKit/Adaptec1542B/Adaptec1542B_reloc.tproj/AHAController.h, revision 1.1

1.1     ! root        1: /*
        !             2:  * Copyright (c) 1993 NeXT Computer, Inc.
        !             3:  *
        !             4:  * AHAController.h. - class definition for Adaptec 1542 driver.
        !             5:  *
        !             6:  * HISTORY
        !             7:  *
        !             8:  * 13 Apr 1993 Doug Mitchell at NeXT
        !             9:  *     Created from Brian Pinkerton's Adaptec driver. 
        !            10:  */
        !            11:  
        !            12: 
        !            13: #import <driverkit/IODevice.h>
        !            14: #import <driverkit/IODeviceDescription.h>
        !            15: #import <driverkit/return.h>
        !            16: #import <driverkit/scsiTypes.h>
        !            17: #import <driverkit/IOSCSIController.h>
        !            18: #import <driverkit/i386/directDevice.h>
        !            19: #import "AHAControllerPrivate.h"
        !            20: #import "AHATypes.h"
        !            21: 
        !            22: 
        !            23: @interface AHAController : IOSCSIController 
        !            24: {
        !            25:        /*
        !            26:         * Hardware info.
        !            27:         */
        !            28:        struct aha_config       config;         /* config info from device */
        !            29:        IOEISAPortAddress       ioBase;         /* base IO port addr */
        !            30:        unsigned char           ahaBoardId;
        !            31:        BOOL                    ioThreadRunning;
        !            32:        
        !            33:        /*
        !            34:         * mailbox and CCB areas. Dynamically allocated from low 
        !            35:         * 16 MB of memory.
        !            36:         */  
        !            37:        struct aha_mb_area      *ahaMbArea;
        !            38:        struct ccb              *ahaCcb;
        !            39:        int                     numFreeCcbs;    /* number of free CCBs */
        !            40: 
        !            41:        /*
        !            42:         * Three queues:
        !            43:         * 
        !            44:         * commandQ:     contains AHACommandBuf's to be executed by the 
        !            45:         *               I/O thread. Enqueued by exported methods (via
        !            46:         *               -executeCmdBuf); dequeued by the I/O thread in
        !            47:         *               -commandRequestOccurred.
        !            48:         *
        !            49:         * outstandingQ: contains ccb's on which the controller is
        !            50:         *               currently operating. The number of ccb's in
        !            51:         *               outstandingQ is outstandingCount. Ccb's are 
        !            52:         *               enqueued here by -runPendingCommands. 
        !            53:         *
        !            54:         * pendingQ:     contains ccb's which the I/O thread is holding
        !            55:         *               on to because outstandingCount == AHA_QUEUE_SIZE.
        !            56:         *               Ccb's are enqueued here by -threadExecuteRequest:.
        !            57:         *
        !            58:         */
        !            59:        queue_head_t    commandQ;               /* list of waiting
        !            60:                                                 * AHACommandBuf's */
        !            61:        id              commandLock;            /* NXLock; protects commandQ */
        !            62:        queue_head_t    outstandingQ;           /* list of running cmds */
        !            63:        unsigned int    outstandingCount;       /* length of outstandingQ */
        !            64:        queue_head_t    pendingQ;
        !            65:        
        !            66:        /*
        !            67:         * Local reference count for reserveDMALock.
        !            68:         */ 
        !            69:        unsigned        dmaLockCount;           
        !            70:        
        !            71:        /*
        !            72:         * Statistics counters.
        !            73:         */ 
        !            74:        unsigned int    maxQueueLen;
        !            75:        unsigned int    queueLenTotal;
        !            76:        unsigned int    totalCommands;
        !            77:        
        !            78:        port_t          interruptPortKern;      /* kernel version of 
        !            79:                                                 * interruptPort */
        !            80: }
        !            81: 
        !            82: /*
        !            83:  * Standard IODirectDevice methods overridden here.
        !            84:  */
        !            85: + (BOOL)probe:deviceDescription;
        !            86: - initFromDeviceDescription    : deviceDescription;
        !            87: - (unsigned)maxTransfer;
        !            88: - free;
        !            89: - (void)interruptOccurred;     
        !            90: - (void)interruptOccurredAt:(int)localNum;
        !            91: - (void)otherOccurred:(int)id;
        !            92: - (void)receiveMsg;
        !            93: - (void)timeoutOccurred;
        !            94: - (void)commandRequestOccurred;
        !            95: 
        !            96: /*
        !            97:  * IOSCSIControllerExported methods implemented here.
        !            98:  */
        !            99: - (sc_status_t) executeRequest         : (IOSCSIRequest *)scsiReq 
        !           100:                         buffer : (void *)buffer 
        !           101:                         client : (vm_task_t)client;
        !           102: - (sc_status_t)resetSCSIBus;
        !           103: 
        !           104: @end
        !           105: 
        !           106: 

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