The Design and Implementation of the FreeBSD Operating System, Second Edition
Now available: The Design and Implementation of the FreeBSD Operating System (Second Edition)


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FreeBSD/Linux Kernel Cross Reference
sys/sys/chio.h

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    1 /*
    2  * Copyright (c) 1996 Jason R. Thorpe <thorpej@and.com>
    3  * All rights reserved.
    4  *
    5  * Redistribution and use in source and binary forms, with or without
    6  * modification, are permitted provided that the following conditions
    7  * are met:
    8  * 1. Redistributions of source code must retain the above copyright
    9  *    notice, this list of conditions and the following disclaimer.
   10  * 2. Redistributions in binary form must reproduce the above copyright
   11  *    notice, this list of conditions and the following disclaimer in the
   12  *    documentation and/or other materials provided with the distribution.
   13  * 3. All advertising materials mentioning features or use of this software
   14  *    must display the following acknowledgements:
   15  *      This product includes software developed by Jason R. Thorpe
   16  *      for And Communications, http://www.and.com/
   17  * 4. The name of the author may not be used to endorse or promote products
   18  *    derived from this software without specific prior written permission.
   19  *
   20  * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR
   21  * IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES
   22  * OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED.
   23  * IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT,
   24  * INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING,
   25  * BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES;
   26  * LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED
   27  * AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY,
   28  * OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
   29  * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
   30  * SUCH DAMAGE.
   31  *
   32  * $FreeBSD: src/sys/sys/chio.h,v 1.7.2.3 1999/09/05 08:22:02 peter Exp $
   33  */
   34 
   35 #ifndef _SYS_CHIO_H_
   36 #define _SYS_CHIO_H_
   37 
   38 #ifndef KERNEL
   39 #include <sys/types.h>
   40 #endif
   41 #include <sys/ioccom.h>
   42 
   43 /*
   44  * Element types.  Used as "to" and "from" type indicators in move
   45  * and exchange operations.
   46  *
   47  * Note that code in sys/scsi/ch.c relies on these values (uses them
   48  * as offsets in an array, and other evil), so don't muck with them
   49  * unless you know what you're doing.
   50  */
   51 #define CHET_MT         0       /* medium transport (picker) */
   52 #define CHET_ST         1       /* storage transport (slot) */
   53 #define CHET_IE         2       /* import/export (portal) */
   54 #define CHET_DT         3       /* data transfer (drive) */
   55 
   56 /*
   57  * Structure used to execute a MOVE MEDIUM command.
   58  */
   59 struct changer_move {
   60         int     cm_fromtype;    /* element type to move from */
   61         int     cm_fromunit;    /* logical unit of from element */
   62         int     cm_totype;      /* element type to move to */
   63         int     cm_tounit;      /* logical unit of to element */
   64         int     cm_flags;       /* misc. flags */
   65 };
   66 
   67 /* cm_flags */
   68 #define CM_INVERT       0x01    /* invert media */
   69 
   70 /*
   71  * Structure used to execute an EXCHANGE MEDIUM command.  In an
   72  * exchange operation, the following steps occur:
   73  *
   74  *      - media from source is moved to first destination.
   75  *
   76  *      - media previously occupying first destination is moved
   77  *        to the second destination.
   78  *
   79  * The second destination may or may not be the same as the source.
   80  * In the case of a simple exchange, the source and second destination
   81  * are the same.
   82  */
   83 struct changer_exchange {
   84         int     ce_srctype;     /* element type of source */
   85         int     ce_srcunit;     /* logical unit of source */
   86         int     ce_fdsttype;    /* element type of first destination */
   87         int     ce_fdstunit;    /* logical unit of first destination */
   88         int     ce_sdsttype;    /* element type of second destination */
   89         int     ce_sdstunit;    /* logical unit of second destination */
   90         int     ce_flags;       /* misc. flags */
   91 };
   92 
   93 /* ce_flags */
   94 #define CE_INVERT1      0x01    /* invert media 1 */
   95 #define CE_INVERT2      0x02    /* invert media 2 */
   96 
   97 /*
   98  * Structure used to execute a POSITION TO ELEMENT command.  This
   99  * moves the current picker in front of the specified element.
  100  */
  101 struct changer_position {
  102         int     cp_type;        /* element type */
  103         int     cp_unit;        /* logical unit of element */
  104         int     cp_flags;       /* misc. flags */
  105 };
  106 
  107 /* cp_flags */
  108 #define CP_INVERT       0x01    /* invert picker */
  109 
  110 /*
  111  * Data returned by CHIOGPARAMS.
  112  */
  113 struct changer_params {
  114         int     cp_curpicker;   /* current picker */
  115         int     cp_npickers;    /* number of pickers */
  116         int     cp_nslots;      /* number of slots */
  117         int     cp_nportals;    /* number of import/export portals */
  118         int     cp_ndrives;     /* number of drives */
  119 };
  120 
  121 /*
  122  * Command used to get element status.
  123  */
  124 struct changer_element_status {
  125         int     ces_type;       /* element type */
  126         u_int8_t *ces_data;     /* pre-allocated data storage */
  127 };
  128 
  129 /*
  130  * Data returned by CHIOGSTATUS is an array of flags bytes.
  131  * Not all flags have meaning for all element types.
  132  */
  133 #define CESTATUS_FULL           0x01    /* element is full */
  134 #define CESTATUS_IMPEXP         0x02    /* media deposited by operator */
  135 #define CESTATUS_EXCEPT         0x04    /* element in abnormal state */
  136 #define CESTATUS_ACCESS         0x08    /* media accessible by picker */
  137 #define CESTATUS_EXENAB         0x10    /* element supports exporting */
  138 #define CESTATUS_INENAB         0x20    /* element supports importing */
  139 
  140 #define CESTATUS_PICKER_MASK    0x05    /* flags valid for pickers */
  141 #define CESTATUS_SLOT_MASK      0x0c    /* flags valid for slots */
  142 #define CESTATUS_PORTAL_MASK    0x3f    /* flags valid for portals */
  143 #define CESTATUS_DRIVE_MASK     0x0c    /* flags valid for drives */
  144 
  145 #define CESTATUS_BITS   \
  146         "\2\6INEAB\5EXENAB\4ACCESS\3EXCEPT\2IMPEXP\1FULL"
  147 
  148 #define CHIOMOVE        _IOW('c', 0x01, struct changer_move)
  149 #define CHIOEXCHANGE    _IOW('c', 0x02, struct changer_exchange)
  150 #define CHIOPOSITION    _IOW('c', 0x03, struct changer_position)
  151 #define CHIOGPICKER     _IOR('c', 0x04, int)
  152 #define CHIOSPICKER     _IOW('c', 0x05, int)
  153 #define CHIOGPARAMS     _IOR('c', 0x06, struct changer_params)
  154 #define CHIOGSTATUS     _IOW('c', 0x08, struct changer_element_status)
  155 
  156 #endif /* !_SYS_CHIO_H_ */

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