/* $OpenBSD: scsi_changer.h,v 1.11 2023/04/11 00:45:09 jsg Exp $ */ /* $NetBSD: scsi_changer.h,v 1.7 1996/04/03 00:25:48 thorpej Exp $ */ /* * Copyright (c) 1996 Jason R. Thorpe <thorpej@and.com> * All rights reserved. * * Partially based on an autochanger driver written by Stefan Grefen * and on an autochanger driver written by the Systems Programming Group * at the University of Utah Computer Science Department. * * 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 acknowledgements: * This product includes software developed by Jason R. Thorpe * for And Communications, http://www.and.com/ * 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. */ /* * SCSI changer interface description */ /* * Partially derived from software written by Stefan Grefen * (grefen@goofy.zdv.uni-mainz.de soon grefen@convex.com) * based on the SCSI System by written Julian Elischer (julian@tfs.com) * for TRW Financial Systems. * * 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 */ #ifndef _SCSI_SCSI_CHANGER_H #define _SCSI_SCSI_CHANGER_H /* * SCSI command format */ /* * Exchange the medium in the source element with the medium * located at the destination element. */ struct scsi_exchange_medium { u_int8_t opcode; #define EXCHANGE_MEDIUM 0xa6 u_int8_t byte2; u_int8_t tea[2]; /* transport element address */ u_int8_t src[2]; /* source address */ u_int8_t fdst[2]; /* first destination address */ u_int8_t sdst[2]; /* second destination address */ u_int8_t flags; #define EXCHANGE_MEDIUM_INV1 0x01 #define EXCHANGE_MEDIUM_INV2 0x02 u_int8_t control; }; /* * Cause the medium changer to check all elements for medium and any * other status relevant to the element. */ struct scsi_initialize_elememt_status { u_int8_t opcode; #define INITIALIZE_ELEMENT_STATUS 0x07 u_int8_t byte2; u_int8_t reserved[3]; u_int8_t control; }; /* * Request the changer to move a unit of media from the source element * to the destination element. */ struct scsi_move_medium { u_int8_t opcode; #define MOVE_MEDIUM 0xa5 u_int8_t byte2; u_int8_t tea[2]; /* transport element address */ u_int8_t src[2]; /* source element address */ u_int8_t dst[2]; /* destination element address */ u_int8_t reserved[2]; u_int8_t flags; #define MOVE_MEDIUM_INVERT 0x01 u_int8_t control; }; /* * Position the specified transport element (picker) in front of * the destination element specified. */ struct scsi_position_to_element { u_int8_t opcode; #define POSITION_TO_ELEMENT 0x2b u_int8_t byte2; u_int8_t tea[2]; /* transport element address */ u_int8_t dst[2]; /* destination element address */ u_int8_t reserved[2]; u_int8_t flags; #define POSITION_TO_ELEMENT_INVERT 0x01 u_int8_t control; }; /* * Request that the changer report the status of its internal elements. */ struct scsi_read_element_status { u_int8_t opcode; #define READ_ELEMENT_STATUS 0xb8 u_int8_t byte2; #define READ_ELEMENT_STATUS_VOLTAG 0x10 /* report volume tag info */ /* ...next 4 bits are an element type code... */ u_int8_t sea[2]; /* starting element address */ u_int8_t count[2]; /* number of elements */ u_int8_t reserved0; u_int8_t len[3]; /* length of data buffer */ u_int8_t reserved1; u_int8_t control; }; struct scsi_request_volume_element_address { u_int8_t opcode; #define REQUEST_VOLUME_ELEMENT_ADDRESS 0xb5 u_int8_t byte2; #define REQUEST_VOLUME_ELEMENT_ADDRESS_VOLTAG 0x10 /* ...next 4 bits are an element type code... */ u_int8_t eaddr[2]; /* element address */ u_int8_t count[2]; /* number of elements */ u_int8_t reserved0; u_int8_t len[3]; /* length of data buffer */ u_int8_t reserved1; u_int8_t control; }; /* XXX scsi_release */ /* * Data returned by READ ELEMENT STATUS consists of an 8-byte header * followed by one or more read_element_status_pages. */ struct read_element_status_header { u_int8_t fear[2]; /* first element address reported */ u_int8_t count[2]; /* number of elements available */ u_int8_t reserved; u_int8_t nbytes[3]; /* byte count of all pages */ }; struct read_element_status_page_header { u_int8_t type; /* element type code; see type codes below */ u_int8_t flags; #define READ_ELEMENT_STATUS_AVOLTAG 0x40 #define READ_ELEMENT_STATUS_PVOLTAG 0x80 u_int8_t edl[2]; /* element descriptor length */ u_int8_t reserved; u_int8_t nbytes[3]; /* byte count of all descriptors */ }; /* * Format of a volume tag */ struct volume_tag { u_int8_t vif[32]; /* volume identification field */ u_int8_t reserved[2]; u_int8_t vsn[2]; /* volume sequence number */ }; struct read_element_status_descriptor { u_int8_t eaddr[2]; /* element address */ u_int8_t flags1; #define READ_ELEMENT_STATUS_FULL 0x01 #define READ_ELEMENT_STATUS_IMPEXP 0x02 #define READ_ELEMENT_STATUS_EXCEPT 0x04 #define READ_ELEMENT_STATUS_ACCESS 0x08 #define READ_ELEMENT_STATUS_EXENAB 0x10 #define READ_ELEMENT_STATUS_INENAB 0x20 #define READ_ELEMENT_STATUS_MT_MASK1 0x05 #define READ_ELEMENT_STATUS_ST_MASK1 0x0c #define READ_ELEMENT_STATUS_IE_MASK1 0x3f #define READ_ELEMENT_STATUS_DT_MASK1 0x0c u_int8_t reserved0; u_int8_t sense_code; u_int8_t sense_qual; /* * dt_scsi_flags and dt_scsi_addr are valid only on data transport * elements. These bytes are undefined for all other element types. */ u_int8_t dt_scsi_flags; #define READ_ELEMENT_STATUS_DT_LUNMASK 0x07 #define READ_ELEMENT_STATUS_DT_LUVALID 0x10 #define READ_ELEMENT_STATUS_DT_IDVALID 0x20 #define READ_ELEMENT_STATUS_DT_NOTBUS 0x80 u_int8_t dt_scsi_addr; u_int8_t reserved1; u_int8_t flags2; #define READ_ELEMENT_STATUS_INVERT 0x40 #define READ_ELEMENT_STATUS_SVALID 0x80 u_int8_t ssea[2]; /* source storage element address */ /* * bytes 12-47: Primary volume tag information. * (field omitted if PVOLTAG = 0) * * bytes 48-83: Alternate volume tag information. * (field omitted if AVOLTAG = 0) */ struct volume_tag pvoltag; /* omitted if PVOLTAG == 0 */ struct volume_tag avoltag; /* omitted if AVOLTAG == 0 */ /* * bytes 84-87: Reserved (moved up if either of the above fields * are omitted) * * bytes 88-end: Vendor-specific: (moved up if either of the * above fields are missing) */ }; /* XXX add data returned by REQUEST VOLUME ELEMENT ADDRESS */ /* Element type codes */ #define ELEMENT_TYPE_MASK 0x0f /* Note: these aren't bits */ #define ELEMENT_TYPE_ALL 0x00 #define ELEMENT_TYPE_MT 0x01 #define ELEMENT_TYPE_ST 0x02 #define ELEMENT_TYPE_IE 0x03 #define ELEMENT_TYPE_DT 0x04 /* * XXX The following definitions should be common to all SCSI device types. */ #define PGCODE_MASK 0x3f /* valid page number bits in pg_code */ #define PGCODE_PS 0x80 /* indicates page is savable */ /* * Device capabilities page. * * This page defines characteristics of the element types in the * medium changer device. * * Note in the definitions below, the following abbreviations are * used: * MT Medium transport element (picker) * ST Storage transport element (slot) * IE Import/export element (portal) * DT Data transfer element (tape/disk drive) */ #define CAP_PAGE 0x1f struct page_device_capabilities { u_int8_t pg_code; /* page code (0x1f) */ u_int8_t pg_length; /* page length (0x12) */ /* * The STOR_xx bits indicate that an element of a given * type may provide independent storage for a unit of * media. The top four bits of this value are reserved. */ u_int8_t stor; #define STOR_MT 0x01 #define STOR_ST 0x02 #define STOR_IE 0x04 #define STOR_DT 0x08 u_int8_t reserved0; /* * The MOVE_TO_yy bits indicate the changer supports * moving a unit of medium from an element of a given type to an * element of type yy. This is used to determine if a given * MOVE MEDIUM command is legal. The top four bits of each * of these values are reserved. */ u_int8_t move_from_mt; u_int8_t move_from_st; u_int8_t move_from_ie; u_int8_t move_from_dt; #define MOVE_TO_MT 0x01 #define MOVE_TO_ST 0x02 #define MOVE_TO_IE 0x04 #define MOVE_TO_DT 0x08 u_int8_t reserved1[2]; /* * Similar to above, but for EXCHANGE MEDIUM. */ u_int8_t exchange_with_mt; u_int8_t exchange_with_st; u_int8_t exchange_with_ie; u_int8_t exchange_with_dt; #define EXCHANGE_WITH_MT 0x01 #define EXCHANGE_WITH_ST 0x02 #define EXCHANGE_WITH_IE 0x04 #define EXCHANGE_WITH_DT 0x08 }; /* * Medium changer element address assignment page. * * Some of these fields can be a little confusing, so an explanation * is in order. * * Each component within a medium changer apparatus is called an * "element". * * The "medium transport element address" is the address of the first * picker (robotic arm). "Number of medium transport elements" tells * us how many pickers exist in the changer. * * The "first storage element address" is the address of the first * slot in the tape or disk magazine. "Number of storage elements" tells * us how many slots exist in the changer. * * The "first import/export element address" is the address of the first * medium portal accessible both by the medium changer and an outside * human operator. This is where the changer might deposit tapes destined * for some vault. The "number of import/export elements" tells us * not many of these portals exist in the changer. NOTE: this number may * be 0. * * The "first data transfer element address" is the address of the first * tape or disk drive in the changer. "Number of data transfer elements" * tells us how many drives exist in the changer. */ #define EA_PAGE 0x1d struct page_element_address_assignment { u_int8_t pg_code; /* page code (0x1d) */ u_int8_t pg_length; /* page length (0x12) */ /* Medium transport element address */ u_int8_t mtea[2]; /* Number of medium transport elements */ u_int8_t nmte[2]; /* First storage element address */ u_int8_t fsea[2]; /* Number of storage elements */ u_int8_t nse[2]; /* First import/export element address */ u_int8_t fieea[2]; /* Number of import/export elements */ u_int8_t niee[2]; /* First data transfer element address */ u_int8_t fdtea[2]; /* Number of data transfer elements */ u_int8_t ndte[2]; u_int8_t reserved[2]; }; /* * Transport geometry parameters page. * * Defines whether each medium transport element is a member of a set of * elements that share a common robotics subsystem and whether the element * is capable of media rotation. One transport geometry descriptor is * transferred for each medium transport element, beginning with the first * medium transport element (other than the default transport element address * of 0). */ #define TGP_PAGE 0x1e struct page_transport_geometry_parameters { u_int8_t pg_code; /* page code (0x1e) */ u_int8_t pg_length; /* page length; variable */ /* Transport geometry descriptor(s) are here. */ u_int8_t misc; #define CAN_ROTATE 0x01 /* Member number in transport element set. */ u_int8_t member; }; #endif /* _SCSI_SCSI_CHANGER_H */
