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Annotation of researchv10dc/lsys/sys/bda.h, revision 1.1.1.1

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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