401 lines
12 KiB
C
401 lines
12 KiB
C
/* $NetBSD: scsi_changer.h,v 1.9 1997/09/29 00:55:26 mjacob Exp $ */
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/*
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* Copyright (c) 1996 Jason R. Thorpe <thorpej@and.com>
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* All rights reserved.
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*
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* Partially based on an autochanger driver written by Stefan Grefen
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* and on an autochanger driver written by the Systems Programming Group
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* at the University of Utah Computer Science Department.
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*
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* Redistribution and use in source and binary forms, with or without
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* modification, are permitted provided that the following conditions
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* are met:
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* 1. Redistributions of source code must retain the above copyright
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* notice, this list of conditions and the following disclaimer.
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* 2. Redistributions in binary form must reproduce the above copyright
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* notice, this list of conditions and the following disclaimer in the
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* documentation and/or other materials provided with the distribution.
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* 3. All advertising materials mentioning features or use of this software
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* must display the following acknowledgements:
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* This product includes software developed by Jason R. Thorpe
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* for And Communications, http://www.and.com/
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* 4. The name of the author may not be used to endorse or promote products
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* derived from this software without specific prior written permission.
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*
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* THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR
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* IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES
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* OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED.
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* IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT,
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* INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING,
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* BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES;
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* LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED
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* AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY,
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* OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
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* OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
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* SUCH DAMAGE.
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*/
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/*
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* SCSI changer interface description
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*/
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/*
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* Partially derived from software written by Stefan Grefen
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* (grefen@goofy.zdv.uni-mainz.de soon grefen@convex.com)
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* based on the SCSI System by written Julian Elischer (julian@tfs.com)
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* for TRW Financial Systems.
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*
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* TRW Financial Systems, in accordance with their agreement with Carnegie
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* Mellon University, makes this software available to CMU to distribute
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* or use in any manner that they see fit as long as this message is kept with
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* the software. For this reason TFS also grants any other persons or
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* organisations permission to use or modify this software.
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*
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* TFS supplies this software to be publicly redistributed
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* on the understanding that TFS is not responsible for the correct
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* functioning of this software in any circumstances.
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*
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* Ported to run under 386BSD by Julian Elischer (julian@tfs.com) Sept 1992
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*/
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#ifndef _SCSI_SCSI_CHANGER_H
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#define _SCSI_SCSI_CHANGER_H 1
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/*
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* SCSI command format
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*/
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/*
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* Exchange the medium in the source element with the medium
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* located at the destination element.
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*/
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struct scsi_exchange_medium {
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u_int8_t opcode;
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#define EXCHANGE_MEDIUM 0xa6
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u_int8_t byte2;
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u_int8_t tea[2]; /* transport element address */
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u_int8_t src[2]; /* source address */
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u_int8_t fdst[2]; /* first destination address */
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u_int8_t sdst[2]; /* second destination address */
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u_int8_t flags;
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#define EXCHANGE_MEDIUM_INV1 0x01
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#define EXCHANGE_MEDIUM_INV2 0x02
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u_int8_t control;
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};
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/*
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* Cause the medium changer to check all elements for medium and any
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* other status relevant to the element.
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*/
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struct scsi_initialize_element_status {
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u_int8_t opcode;
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#define INITIALIZE_ELEMENT_STATUS 0x07
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u_int8_t byte2;
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u_int8_t reserved[3];
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u_int8_t control;
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};
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/*
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* Request the changer to move a unit of media from the source element
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* to the destination element.
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*/
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struct scsi_move_medium {
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u_int8_t opcode;
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#define MOVE_MEDIUM 0xa5
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u_int8_t byte2;
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u_int8_t tea[2]; /* transport element address */
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u_int8_t src[2]; /* source element address */
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u_int8_t dst[2]; /* destination element address */
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u_int8_t reserved[2];
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u_int8_t flags;
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#define MOVE_MEDIUM_INVERT 0x01
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u_int8_t control;
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};
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/*
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* Position the specified transport element (picker) in front of
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* the destination element specified.
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*/
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struct scsi_position_to_element {
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u_int8_t opcode;
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#define POSITION_TO_ELEMENT 0x2b
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u_int8_t byte2;
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u_int8_t tea[2]; /* transport element address */
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u_int8_t dst[2]; /* destination element address */
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u_int8_t reserved[2];
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u_int8_t flags;
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#define POSITION_TO_ELEMENT_INVERT 0x01
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u_int8_t control;
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};
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/*
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* Request that the changer report the status of its internal elements.
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*/
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struct scsi_read_element_status {
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u_int8_t opcode;
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#define READ_ELEMENT_STATUS 0xb8
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u_int8_t byte2;
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#define READ_ELEMENT_STATUS_VOLTAG 0x10 /* report volume tag info */
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/* ...next 4 bits are an element type code... */
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u_int8_t sea[2]; /* starting element address */
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u_int8_t count[2]; /* number of elements */
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u_int8_t reserved0;
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u_int8_t len[3]; /* length of data buffer */
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u_int8_t reserved1;
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u_int8_t control;
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};
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struct scsi_request_volume_element_address {
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u_int8_t opcode;
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#define REQUEST_VOLUME_ELEMENT_ADDRESS 0xb5
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u_int8_t byte2;
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#define REQUEST_VOLUME_ELEMENT_ADDRESS_VOLTAG 0x10
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/* ...next 4 bits are an element type code... */
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u_int8_t eaddr[2]; /* element address */
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u_int8_t count[2]; /* number of elements */
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u_int8_t reserved0;
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u_int8_t len[3]; /* length of data buffer */
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u_int8_t reserved1;
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u_int8_t control;
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};
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/* XXX scsi_release */
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/*
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* Data returned by READ ELEMENT STATUS consists of an 8-byte header
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* followed by one or more read_element_status_pages.
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*/
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struct read_element_status_header {
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u_int8_t fear[2]; /* first element address reported */
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u_int8_t count[2]; /* number of elements available */
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u_int8_t reserved;
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u_int8_t nbytes[3]; /* byte count of all pages */
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};
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struct read_element_status_page_header {
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u_int8_t type; /* element type code; see type codes below */
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u_int8_t flags;
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#define READ_ELEMENT_STATUS_AVOLTAG 0x40
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#define READ_ELEMENT_STATUS_PVOLTAG 0x80
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u_int8_t edl[2]; /* element descriptor length */
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u_int8_t reserved;
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u_int8_t nbytes[3]; /* byte count of all descriptors */
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};
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struct read_element_status_descriptor {
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u_int8_t eaddr[2]; /* element address */
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u_int8_t flags1;
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#define READ_ELEMENT_STATUS_FULL 0x01
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#define READ_ELEMENT_STATUS_IMPEXP 0x02
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#define READ_ELEMENT_STATUS_EXCEPT 0x04
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#define READ_ELEMENT_STATUS_ACCESS 0x08
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#define READ_ELEMENT_STATUS_EXENAB 0x10
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#define READ_ELEMENT_STATUS_INENAB 0x20
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#define READ_ELEMENT_STATUS_MT_MASK1 0x05
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#define READ_ELEMENT_STATUS_ST_MASK1 0x0c
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#define READ_ELEMENT_STATUS_IE_MASK1 0x3f
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#define READ_ELEMENT_STATUS_DT_MASK1 0x0c
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u_int8_t reserved0;
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u_int8_t sense_code;
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u_int8_t sense_qual;
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/*
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* dt_scsi_flags and dt_scsi_addr are valid only on data transport
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* elements. These bytes are undefined for all other element types.
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*/
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u_int8_t dt_scsi_flags;
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#define READ_ELEMENT_STATUS_DT_LUNMASK 0x07
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#define READ_ELEMENT_STATUS_DT_LUVALID 0x10
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#define READ_ELEMENT_STATUS_DT_IDVALID 0x20
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#define READ_ELEMENT_STATUS_DT_NOTBUS 0x80
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u_int8_t dt_scsi_addr;
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u_int8_t reserved1;
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u_int8_t flags2;
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#define READ_ELEMENT_STATUS_INVERT 0x40
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#define READ_ELEMENT_STATUS_SVALID 0x80
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u_int8_t ssea[2]; /* source storage element address */
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/*
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* bytes 12-47: Primary volume tag information.
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* (field omitted if PVOLTAG = 0)
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*
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* bytes 48-83: Alternate volume tag information.
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* (field omitted if AVOLTAG = 0)
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*
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* bytes 84-87: Reserved (moved up if either of the above fields
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* are omitted)
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*
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* bytes 88-end: Vendor-specific: (moved up if either of the
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* above fields are missing)
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*/
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};
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/* XXX add data returned by REQUEST VOLUME ELEMENT ADDRESS */
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/* Element type codes */
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#define ELEMENT_TYPE_MASK 0x0f /* Note: these aren't bits */
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#define ELEMENT_TYPE_ALL 0x00
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#define ELEMENT_TYPE_MT 0x01
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#define ELEMENT_TYPE_ST 0x02
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#define ELEMENT_TYPE_IE 0x03
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#define ELEMENT_TYPE_DT 0x04
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/*
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* XXX The following definitions should be common to all SCSI device types.
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*/
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#define PGCODE_MASK 0x3f /* valid page number bits in pg_code */
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#define PGCODE_PS 0x80 /* indicates page is savable */
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/*
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* Device capabilities page.
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*
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* This page defines characteristics of the elemenet types in the
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* medium changer device.
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*
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* Note in the definitions below, the following abbreviations are
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* used:
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* MT Medium transport element (picker)
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* ST Storage transport element (slot)
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* IE Import/export element (portal)
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* DT Data tranfer element (tape/disk drive)
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*/
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struct page_device_capabilities {
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u_int8_t pg_code; /* page code (0x1f) */
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u_int8_t pg_length; /* page length (0x12) */
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/*
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* The STOR_xx bits indicate that an element of a given
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* type may provide independent storage for a unit of
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* media. The top four bits of this value are reserved.
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*/
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u_int8_t stor;
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#define STOR_MT 0x01
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#define STOR_ST 0x02
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#define STOR_IE 0x04
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#define STOR_DT 0x08
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u_int8_t reserved0;
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/*
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* The MOVE_TO_yy bits indicate the changer supports
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* moving a unit of medium from an element of a given type to an
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* element of type yy. This is used to determine if a given
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* MOVE MEDIUM command is legal. The top four bits of each
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* of these values are reserved.
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*/
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u_int8_t move_from_mt;
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u_int8_t move_from_st;
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u_int8_t move_from_ie;
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u_int8_t move_from_dt;
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#define MOVE_TO_MT 0x01
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#define MOVE_TO_ST 0x02
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#define MOVE_TO_IE 0x04
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#define MOVE_TO_DT 0x08
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u_int8_t reserved1[2];
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/*
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* Similar to above, but for EXCHANGE MEDIUM.
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*/
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u_int8_t exchange_with_mt;
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u_int8_t exchange_with_st;
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u_int8_t exchange_with_ie;
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u_int8_t exchange_with_dt;
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#define EXCHANGE_WITH_MT 0x01
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#define EXCHANGE_WITH_ST 0x02
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#define EXCHANGE_WITH_IE 0x04
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#define EXCHANGE_WITH_DT 0x08
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};
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/*
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* Medium changer elemement address assignment page.
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*
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* Some of these fields can be a little confusing, so an explanation
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* is in order.
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*
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* Each component within a a medium changer apparatus is called an
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* "element".
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*
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* The "medium transport element address" is the address of the first
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* picker (robotic arm). "Number of medium transport elements" tells
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* us how many pickers exist in the changer.
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*
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* The "first storage element address" is the address of the first
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* slot in the tape or disk magazine. "Number of storage elements" tells
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* us how many slots exist in the changer.
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*
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* The "first import/export element address" is the address of the first
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* medium portal accessible both by the medium changer and an outside
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* human operator. This is where the changer might deposit tapes destined
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* for some vault. The "number of import/export elements" tells us
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* not many of these portals exist in the changer. NOTE: this number may
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* be 0.
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*
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* The "first data transfer element address" is the address of the first
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* tape or disk drive in the changer. "Number of data transfer elements"
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* tells us how many drives exist in the changer.
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*/
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struct page_element_address_assignment {
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u_int8_t pg_code; /* page code (0x1d) */
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u_int8_t pg_length; /* page length (0x12) */
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/* Medium transport element address */
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u_int8_t mtea[2];
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/* Number of medium transport elements */
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u_int8_t nmte[2];
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/* First storage element address */
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u_int8_t fsea[2];
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/* Number of storage elements */
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u_int8_t nse[2];
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/* First import/export element address */
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u_int8_t fieea[2];
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/* Number of import/export elements */
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u_int8_t niee[2];
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/* First data transfer element address */
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u_int8_t fdtea[2];
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/* Number of data trafer elements */
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u_int8_t ndte[2];
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u_int8_t reserved[2];
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};
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/*
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* Transport geometry parameters page.
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*
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* Defines whether each medium transport element is a member of a set of
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* elements that share a common robotics subsystem and whether the element
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* is capable of media rotation. One transport geometry descriptor is
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* transferred for each medium transport element, beginning with the first
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* medium transport element (other than the default transport element address
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* of 0).
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*/
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struct page_transport_geometry_parameters {
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u_int8_t pg_code; /* page code (0x1e) */
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u_int8_t pg_length; /* page length; variable */
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/* Transport geometry descriptor(s) are here. */
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u_int8_t misc;
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#define CAN_ROTATE 0x01
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/* Member number in transport element set. */
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u_int8_t member;
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};
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#endif /* _SCSI_SCSI_CHANGER_H */
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