FreeBSD/Linux Kernel Cross Reference
sys/dev/vme/xyvar.h

     /*      $NetBSD: xyvar.h,v 1.8 2002/07/23 20:49:55 hannken Exp $        */
     
     /*
      *
      * Copyright (c) 1995 Charles D. Cranor
      * All rights reserved.
      *
      * Redistribution and use in source and binary forms, with or without
      * modification, are permitted provided that the following conditions
     * are met:
     * 1. Redistributions of source code must retain the above copyright
     *    notice, this list of conditions and the following disclaimer.
     * 2. Redistributions in binary form must reproduce the above copyright
     *    notice, this list of conditions and the following disclaimer in the
     *    documentation and/or other materials provided with the distribution.
     * 3. All advertising materials mentioning features or use of this software
     *    must display the following acknowledgement:
     *      This product includes software developed by Charles D. Cranor.
     * 4. The name of the author may not be used to endorse or promote products
     *    derived from this software without specific prior written permission.
     *
     * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR
     * IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES
     * OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED.
     * IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT,
     * INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT
     * NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
     * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
     * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
     * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF
     * THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
     */
    
    /*
     * x y v a r . h
     *
     * this file defines the software structure we use to control the
     * 450/451.
     *
     * author: Chuck Cranor <chuck@ccrc.wustl.edu>
     */
    
    #include <sys/callout.h>
    
    /*
     * i/o request: wrapper for hardware's iopb data structure
     */
    struct xy_iorq {
            struct xy_iopb *iopb;   /* address of matching iopb */
            struct xy_iopb *dmaiopb;/* DMA address of above */
            struct xyc_softc *xyc;  /* who we are working with */
            struct xy_softc *xy;    /* which disk */
            int ttl;                /* time to live */
            int mode;               /* current mode (state+other data) */
            int tries;              /* number of times we have tried it */
            int errno;              /* error number if we fail */
            int lasterror;          /* last error we got */
            int blockno;            /* starting block no for this xfer */
            int sectcnt;            /* number of sectors in xfer */
            char *dbuf;             /* KVA of data buffer (advances) */
            struct buf *buf;        /* for NORM */
            bus_dmamap_t dmamap;    /* DMA I/O handle */
    };
    
    /*
     * state
     */
    #define XY_SUB_MASK     0xf0    /* mask bits for state */
    #define XY_SUB_FREE     0x00    /* free */
    #define XY_SUB_NORM     0x10    /* normal I/O request */
    #define XY_SUB_WAIT     0x20    /* normal I/O request in the
                                       context of a process */
    #define XY_SUB_POLL     0x30    /* polled mode */
    #define XY_SUB_DONE     0x40    /* not active, but can't be free'd yet */
    #define XY_SUB_NOQ      0x50    /* don't queue, just submit (internal) */
    
    #define XY_STATE(X) ((X) & XY_SUB_MASK) /* extract state from mode */
    #define XY_NEWSTATE(OLD, NEW) (((OLD) & ~XY_SUB_MASK) |(NEW)) /* new state */
    
    
    /*
     * other mode data
     */
    #define XY_MODE_VERBO   0x08    /* print error messages */
    #define XY_MODE_B144    0x04    /* handling a bad144 sector */
    
    
    /*
     * software timers and flags
     */
    #define XYC_SUBWAITLIM  4       /* max number of "done" IOPBs there can be
                                       where we still allow a SUB_WAIT command */
    #define XYC_TICKCNT     (5*hz)  /* call xyc_tick on this interval (5 sec) */
    #define XYC_MAXTTL      2       /* max number of xy ticks to live */
    #define XYC_NOUNIT      (-1)    /* for xycmd: no unit number */
    
    /*
     * a "xy_softc" structure contains per-disk state info.
     */
   struct xy_softc {
           struct device sc_dev;   /* device struct, reqd by autoconf */
           struct disk sc_dk;      /* generic disk info */
           struct xyc_softc *parent;/* parent */
           u_short flags;          /* flags */
           u_short state;          /* device state */
           int xy_drive;           /* unit number */
           int drive_type;         /* drive type (as per disk) */
   
           /* geometry */
           u_short ncyl, acyl, pcyl;       /* number of cyl's */
           u_short sectpercyl;     /* nhead*nsect */
           u_char nhead;           /* number of heads */
           u_char nsect;           /* number of sectors per track */
           u_char hw_spt;          /* as above, but includes spare sectors */
           struct xy_iorq *xyrq;   /* this disk's ioreq structure */
           struct bufq_state xyq;  /* queued I/O requests */
           struct dkbad dkb;       /* bad144 sectors */
   };
   
   /*
    * flags
    */
   
   #define XY_WLABEL 0x0001           /* write label */
   /*
    * state
    */
   
   #define XY_DRIVE_UNKNOWN 0         /* never talked to it */
   #define XY_DRIVE_ATTACHING 1       /* attach in progress */
   #define XY_DRIVE_NOLABEL 2         /* drive on-line, no label */
   #define XY_DRIVE_ONLINE  3         /* drive is on-line */
   
   /*
    * a "xyc_softc" structure contains per-disk-controller state info,
    * including a list of active controllers.
    */
   
   struct xyc_softc {
           struct device sc_dev;           /* device struct, reqd by autoconf */
           struct evcnt sc_intrcnt;        /* event counter (for vmstat -i) */
   
           struct callout sc_tick_ch;
   
           struct xyc *xyc;                /* vaddr of vme registers */
   
           struct xy_softc *sc_drives[XYC_MAXDEV]; /* drives on this controller */
           int ipl;                        /* interrupt level */
           int vector;                     /* interrupt vector */
           bus_dma_tag_t dmatag;           /* Bus DMA tag */
   
           struct xy_iorq *reqs;           /* i/o requests */
           struct xy_iopb *iopbase;        /* iopb base addr (maps iopb->iorq) */
           struct xy_iopb *dvmaiopb;       /* iopb base in DVMA space, not kvm */
           bus_dmamap_t iopmap;            /* IOPB DMA handle */
           bus_dmamap_t auxmap;            /* auxiliary DMA handle */
   
           struct xy_iorq *ciorq;          /* controller's iorq */
           struct xy_iopb *ciopb;          /* controller's iopb */
   
           int xy_hand;                    /* hand */
           struct xy_iorq *xy_chain[XYC_MAXIOPB];
                                           /* current chain */
           int no_ols;                     /* disable overlap seek for stupid 450s */
   };
   
   /*
    * reset blast modes
    */
   
   #define XY_RSET_NONE (struct xy_iorq *)(-1)   /* restart all requests */
   #define XY_RSET_ALL  (struct xy_iorq *)(-2)   /* don't restart anything */

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