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  * $FreeBSD$
   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 #define CHET_MAX        CHET_DT
   56 
   57 /*
   58  * Maximum length of a volume identification string
   59  */
   60 #define CH_VOLTAG_MAXLEN        32
   61 
   62 /*
   63  * Structure used to execute a MOVE MEDIUM command.
   64  */
   65 struct changer_move {
   66         u_int16_t       cm_fromtype;    /* element type to move from */
   67         u_int16_t       cm_fromunit;    /* logical unit of from element */
   68         u_int16_t       cm_totype;      /* element type to move to */
   69         u_int16_t       cm_tounit;      /* logical unit of to element */
   70         u_int16_t       cm_flags;       /* misc. flags */
   71 };
   72 
   73 /* cm_flags */
   74 #define CM_INVERT       0x01    /* invert media */
   75 
   76 /*
   77  * Structure used to execute an EXCHANGE MEDIUM command.  In an
   78  * exchange operation, the following steps occur:
   79  *
   80  *      - media from source is moved to first destination.
   81  *
   82  *      - media previously occupying first destination is moved
   83  *        to the second destination.
   84  *
   85  * The second destination may or may not be the same as the source.
   86  * In the case of a simple exchange, the source and second destination
   87  * are the same.
   88  */
   89 struct changer_exchange {
   90         u_int16_t       ce_srctype;     /* element type of source */
   91         u_int16_t       ce_srcunit;     /* logical unit of source */
   92         u_int16_t       ce_fdsttype;    /* element type of first destination */
   93         u_int16_t       ce_fdstunit;    /* logical unit of first destination */
   94         u_int16_t       ce_sdsttype;    /* element type of second destination */
   95         u_int16_t       ce_sdstunit;    /* logical unit of second destination */
   96         u_int16_t       ce_flags;       /* misc. flags */
   97 };
   98 
   99 /* ce_flags */
  100 #define CE_INVERT1      0x01    /* invert media 1 */
  101 #define CE_INVERT2      0x02    /* invert media 2 */
  102 
  103 /*
  104  * Structure used to execute a POSITION TO ELEMENT command.  This
  105  * moves the current picker in front of the specified element.
  106  */
  107 struct changer_position {
  108         u_int16_t       cp_type;        /* element type */
  109         u_int16_t       cp_unit;        /* logical unit of element */
  110         u_int16_t       cp_flags;       /* misc. flags */
  111 };
  112 
  113 /* cp_flags */
  114 #define CP_INVERT       0x01    /* invert picker */
  115 
  116 /*
  117  * Data returned by CHIOGPARAMS.
  118  */
  119 struct changer_params {
  120         u_int16_t       cp_npickers;    /* number of pickers */
  121         u_int16_t       cp_nslots;      /* number of slots */
  122         u_int16_t       cp_nportals;    /* number of import/export portals */
  123         u_int16_t       cp_ndrives;     /* number of drives */
  124 };
  125 
  126 /*
  127  * Command used to get element status.
  128  */
  129 
  130 struct changer_voltag {
  131         u_char          cv_volid[CH_VOLTAG_MAXLEN+1];
  132         u_int16_t       cv_serial;
  133 };
  134 
  135 typedef struct changer_voltag changer_voltag_t;
  136 
  137 /*
  138  * Flags definitions for ces_status
  139  * Not all flags have meaning for all element types.
  140  */
  141 typedef enum {
  142         CES_STATUS_FULL   = 0x001,      /* element is full */
  143         CES_STATUS_IMPEXP = 0x002,      /* media deposited by operator */
  144         CES_STATUS_EXCEPT = 0x004,      /* element in abnormal state */
  145         CES_PICKER_MASK   = 0x005,      /* flags valid for pickers */
  146         CES_STATUS_ACCESS = 0x008,      /* media accessible by picker */
  147         CES_SLOT_MASK     = 0x00c,      /* flags valid for slots */
  148         CES_DRIVE_MASK    = 0x00c,      /* flags valid for drives */
  149         CES_STATUS_EXENAB = 0x010,      /* element supports exporting */
  150         CES_STATUS_INENAB = 0x020,      /* element supports importing */
  151         CES_PORTAL_MASK   = 0x03f,      /* flags valid for portals */
  152         CES_INVERT        = 0x040,      /* invert bit */
  153         CES_SOURCE_VALID  = 0x080,      /* source address (ces_source) valid */
  154         CES_SCSIID_VALID  = 0x100,      /* ces_scsi_id is valid */
  155         CES_LUN_VALID     = 0x200       /* ces_scsi_lun is valid */
  156 } ces_status_flags;
  157 
  158 struct changer_element_status {
  159         u_int8_t                ces_type;         /* element type */
  160         u_int16_t               ces_addr;         /* logical element address */
  161         u_int16_t               ces_int_addr;     /* changer element address */
  162         ces_status_flags        ces_flags;        /* 
  163                                                    * see CESTATUS definitions
  164                                                    * below 
  165                                                    */ 
  166         u_int8_t                ces_sensecode;    /* 
  167                                                    * additional sense
  168                                                    * code for element */
  169         u_int8_t                ces_sensequal;    /*
  170                                                    * additional sense
  171                                                    * code qualifier 
  172                                                    */
  173         u_int8_t                ces_source_type;  /* 
  174                                                    * element type of
  175                                                    * source address 
  176                                                    */
  177         u_int16_t               ces_source_addr;  /* 
  178                                                    * source address of medium
  179                                                    */
  180         changer_voltag_t        ces_pvoltag;      /* primary volume tag */
  181         changer_voltag_t        ces_avoltag;      /* alternate volume tag */
  182         u_int8_t                ces_scsi_id;      /* SCSI id of element */
  183         u_int8_t                ces_scsi_lun;     /* SCSI lun of element */
  184 };
  185 
  186 struct changer_element_status_request {
  187         u_int16_t                       cesr_element_type;
  188         u_int16_t                       cesr_element_base;
  189         u_int16_t                       cesr_element_count;
  190 
  191         u_int16_t                       cesr_flags;
  192 #define CESR_VOLTAGS    0x01
  193 
  194         struct changer_element_status   *cesr_element_status;
  195 };
  196 
  197 
  198 struct changer_set_voltag_request {
  199         u_int16_t               csvr_type;
  200         u_int16_t               csvr_addr;
  201 
  202         u_int16_t               csvr_flags;
  203 #define CSVR_MODE_MASK          0x0f    /* mode mask, acceptable modes below: */
  204 #define CSVR_MODE_SET           0x00    /* set volume tag if not set */
  205 #define CSVR_MODE_REPLACE       0x01    /* unconditionally replace volume tag */
  206 #define CSVR_MODE_CLEAR         0x02    /* clear volume tag */
  207 
  208 #define CSVR_ALTERNATE          0x10    /* set to work with alternate voltag */
  209 
  210         changer_voltag_t        csvr_voltag;
  211 };
  212 
  213 
  214 #define CESTATUS_BITS   \
  215         "\2\6INEAB\5EXENAB\4ACCESS\3EXCEPT\2IMPEXP\1FULL"
  216 
  217 #define CHIOMOVE        _IOW('c', 0x01, struct changer_move)
  218 #define CHIOEXCHANGE    _IOW('c', 0x02, struct changer_exchange)
  219 #define CHIOPOSITION    _IOW('c', 0x03, struct changer_position)
  220 #define CHIOGPICKER     _IOR('c', 0x04, int)
  221 #define CHIOSPICKER     _IOW('c', 0x05, int)
  222 #define CHIOGPARAMS     _IOR('c', 0x06, struct changer_params)
  223 #define CHIOIELEM       _IOW('c', 0x07, u_int32_t)
  224 #define CHIOGSTATUS     _IOW('c', 0x08, struct changer_element_status_request)
  225 #define CHIOSETVOLTAG   _IOW('c', 0x09, struct changer_set_voltag_request)
  226 
  227 #endif /* !_SYS_CHIO_H_ */

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