FreeBSD/Linux Kernel Cross Reference
sys/dev/scsipi/stvar.h

     /*      $NetBSD: stvar.h,v 1.18 2008/04/28 20:23:58 martin Exp $ */
     
     /*-
      * Copyright (c) 1998 The NetBSD Foundation, Inc.
      * All rights reserved.
      *
      * This code is derived from software contributed to The NetBSD Foundation
      * by Charles M. Hannum.
      *
     * 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.
     *
     * THIS SOFTWARE IS PROVIDED BY THE NETBSD FOUNDATION, INC. AND CONTRIBUTORS
     * ``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 FOUNDATION OR CONTRIBUTORS
     * 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.
     */
    
    /*
     * Originally written by Julian Elischer (julian@tfs.com)
     * for TRW Financial Systems for use under the MACH(2.5) operating system.
     *
     * TRW Financial Systems, in accordance with their agreement with Carnegie
     * Mellon University, makes this software available to CMU to distribute
     * or use in any manner that they see fit as long as this message is kept with
     * the software. For this reason TFS also grants any other persons or
     * organisations permission to use or modify this software.
     *
     * TFS supplies this software to be publicly redistributed
     * on the understanding that TFS is not responsible for the correct
     * functioning of this software in any circumstances.
     *
     * Ported to run under 386BSD by Julian Elischer (julian@tfs.com) Sept 1992
     * major changes by Julian Elischer (julian@jules.dialix.oz.au) May 1993
     *
     * A lot of rewhacking done by mjacob (mjacob@nas.nasa.gov).
     */
    
    #include "rnd.h"
    #if NRND > 0
    #include <sys/rnd.h>
    #endif
    
    #include <dev/scsipi/scsipi_all.h>
    #include <dev/scsipi/scsiconf.h>
    
    #define ST_IO_TIME      (3 * 60 * 1000)         /* 3 minutes */
    #define ST_CTL_TIME     (30 * 1000)             /* 30 seconds */
    #define ST_SPC_TIME     (4 * 60 * 60 * 1000)    /* 4 hours */
    
    #define ST_RETRIES      4       /* only on non IO commands */
    
    struct modes {
            u_int quirks;                   /* same definitions as in quirkdata */
            int blksize;
            u_int8_t density;
    };
    
    struct quirkdata {
            u_int quirks;
    #define ST_Q_FORCE_BLKSIZE      0x0001
    #define ST_Q_SENSE_HELP         0x0002  /* must do READ for good MODE SENSE */
    #define ST_Q_IGNORE_LOADS       0x0004
    #define ST_Q_BLKSIZE            0x0008  /* variable-block media_blksize > 0 */
    #define ST_Q_UNIMODAL           0x0010  /* unimode drive rejects mode select */
    #define ST_Q_NOPREVENT          0x0020  /* does not support PREVENT */
    #define ST_Q_ERASE_NOIMM        0x0040  /* drive rejects ERASE/w Immed bit */
    #define ST_Q_NOFILEMARKS        0x0080  /* can only write 0 filemarks */
            u_int page_0_size;
    #define MAX_PAGE_0_SIZE 64
            struct modes modes[4];
    };
    
    struct st_quirk_inquiry_pattern {
            struct scsipi_inquiry_pattern pattern;
            struct quirkdata quirkdata;
    };
    
    struct st_softc {
            struct device sc_dev;
    /*--------------------callback to bus-specific code--------------------------*/
            int (*ops)(struct st_softc *, int, int);
    #define ST_OPS_RBL              0x00    /* read block limit */
    #define ST_OPS_MODESENSE        0x01    /* mode sense */
    #define ST_OPS_MODESELECT       0x02    /* mode select */
    #define ST_OPS_CMPRSS_ON        0x03    /* turn on compression */
   #define ST_OPS_CMPRSS_OFF       0x04    /* turn off compression */
   /*--------------------present operating parameters, flags etc.---------------*/
           int flags;              /* see below                         */
           u_int quirks;           /* quirks for the open mode          */
           int blksize;            /* blksize we are using              */
           u_int8_t density;       /* present density                   */
           u_int page_0_size;      /* size of page 0 data               */
           u_int last_dsty;        /* last density opened               */
           short mt_resid;         /* last (short) resid                */
           short mt_erreg;         /* last error (sense key) seen       */
           /* relative to BOT location */
           daddr_t fileno;
           daddr_t blkno;
           int32_t last_io_resid;
           int32_t last_ctl_resid;
   #define mt_key  mt_erreg
           u_int8_t asc;           /* last asc code seen                */
           u_int8_t ascq;          /* last asc code seen                */
   /*--------------------device/scsi parameters---------------------------------*/
           struct scsipi_periph *sc_periph;/* our link to the adpter etc.       */
   /*--------------------parameters reported by the device ---------------------*/
           int blkmin;             /* min blk size                       */
           int blkmax;             /* max blk size                       */
           const struct quirkdata *quirkdata;      /* if we have a rogue entry  */
   /*--------------------parameters reported by the device for this media-------*/
           u_long numblks;         /* nominal blocks capacity            */
           int media_blksize;      /* 0 if not ST_FIXEDBLOCKS            */
           u_int8_t media_density; /* this is what it said when asked    */
   /*--------------------quirks for the whole drive-----------------------------*/
           u_int drive_quirks;     /* quirks of this drive               */
   /*--------------------How we should set up when opening each minor device----*/
           struct modes modes[4];  /* plus more for each mode            */
           u_int8_t  modeflags[4]; /* flags for the modes                */
   #define DENSITY_SET_BY_USER     0x01
   #define DENSITY_SET_BY_QUIRK    0x02
   #define BLKSIZE_SET_BY_USER     0x04
   #define BLKSIZE_SET_BY_QUIRK    0x08
   /*--------------------storage for sense data returned by the drive-----------*/
           u_char sense_data[MAX_PAGE_0_SIZE];     /*
                                                    * additional sense data needed
                                                    * for mode sense/select.
                                                    */
           struct bufq_state *buf_queue;   /* the queue of pending IO */
                                           /* operations */
           struct callout sc_callout;      /* restarting the queue after */
                                           /* transient error */
   
           struct io_stats *stats;         /* statistics for the drive */
   
   #if NRND > 0
           rndsource_element_t     rnd_source;
   #endif
   };
   
   #define ST_INFO_VALID   0x0001
   #define ST_BLOCK_SET    0x0002  /* block size, mode set by ioctl      */
   #define ST_WRITTEN      0x0004  /* data has been written, EOD needed */
   #define ST_FIXEDBLOCKS  0x0008
   #define ST_AT_FILEMARK  0x0010
   #define ST_EIO_PENDING  0x0020  /* error reporting deferred until next op */
   #define ST_NEW_MOUNT    0x0040  /* still need to decide mode             */
   #define ST_READONLY     0x0080  /* st_mode_sense says write protected */
   #define ST_FM_WRITTEN   0x0100  /*
                                    * EOF file mark written  -- used with
                                    * ~ST_WRITTEN to indicate that multiple file
                                    * marks have been written
                                    */
   #define ST_BLANK_READ   0x0200  /* BLANK CHECK encountered already */
   #define ST_2FM_AT_EOD   0x0400  /* write 2 file marks at EOD */
   #define ST_MOUNTED      0x0800  /* Device is presently mounted */
   #define ST_DONTBUFFER   0x1000  /* Disable buffering/caching */
   #define ST_EARLYWARN    0x2000  /* Do (deferred) EOM for variable mode */
   #define ST_EOM_PENDING  0x4000  /* EOM reporting deferred until next op */
   #define ST_POSUPDATED   0x8000  /* tape position already updated */
   
   #define ST_PER_ACTION   (ST_AT_FILEMARK | ST_EIO_PENDING | ST_EOM_PENDING | \
                            ST_BLANK_READ)
   #define ST_PER_MOUNT    (ST_INFO_VALID | ST_BLOCK_SET | ST_WRITTEN |    \
                            ST_FIXEDBLOCKS | ST_READONLY | ST_FM_WRITTEN | \
                            ST_2FM_AT_EOD | ST_PER_ACTION | ST_POSUPDATED)
   
   void    stattach(struct device *, struct st_softc *, void *);
   int     stactivate(struct device *, enum devact);
   int     stdetach(struct device *, int);
   
   extern struct cfdriver st_cd;

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