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Annotation of researchv10dc/lsys/sys/bda.h, revision 1.1

1.1     ! root        1: /*
        !             2:  * defs for the kdb50 driver
        !             3:  */
        !             4: 
        !             5: /*
        !             6:  * per-controller structure
        !             7:  */
        !             8: 
        !             9: #define        BDACMD  32      /* no more than this many command packets */
        !            10: #define        BDANMAP 20      /* number of chunks of map */
        !            11: 
        !            12: struct bd {
        !            13:        struct biic *bd_addr;           /* device register address */
        !            14:        short   bd_flags;               /* misc flag bits */
        !            15:        short   bd_credits;             /* number of flow control credits */
        !            16:        struct bdcomm *bd_comm;         /* virt addr of comm area */
        !            17:        struct bdcmd *bd_cpkt;          /* virt addr of command packets */
        !            18:        struct bdrsp *bd_rpkt;          /* virt addr of response packets */
        !            19:        long    *bd_pmap;               /* page table for mapped transfers */
        !            20:        struct buf *bd_cbuf;            /* buffer for comm/cmds */
        !            21:        struct buf *bd_rbuf;            /* buffer for responses */
        !            22:        struct buf *bd_mbuf;            /* buffer for page table */
        !            23:        short   bd_cnext;               /* index of next cmd descriptor */
        !            24:        short   bd_rnext;               /* ditto response */
        !            25:        char    bd_cbusy[BDACMD];       /* busy flags for commands */
        !            26:        char    bd_back[BDACMD];        /* back-index from cmd ring to packets */
        !            27:        unsigned short bd_mbase[BDACMD];        /* base addr of allocated map */
        !            28:        unsigned short bd_msize[BDACMD];        /* size of allocated map */
        !            29:        struct map bd_map[BDANMAP];     /* and how it is allocated */
        !            30: };

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